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1

Segmenting CT prostate images using population and patient-specific statistics for radiotherapy  

SciTech Connect

Purpose: In the segmentation of sequential treatment-time CT prostate images acquired in image-guided radiotherapy, accurately capturing the intrapatient variation of the patient under therapy is more important than capturing interpatient variation. However, using the traditional deformable-model-based segmentation methods, it is difficult to capture intrapatient variation when the number of samples from the same patient is limited. This article presents a new deformable model, designed specifically for segmenting sequential CT images of the prostate, which leverages both population and patient-specific statistics to accurately capture the intrapatient variation of the patient under therapy. Methods: The novelty of the proposed method is twofold: First, a weighted combination of gradient and probability distribution function (PDF) features is used to build the appearance model to guide model deformation. The strengths of each feature type are emphasized by dynamically adjusting the weight between the profile-based gradient features and the local-region-based PDF features during the optimization process. An additional novel aspect of the gradient-based features is that, to alleviate the effect of feature inconsistency in the regions of gas and bone adjacent to the prostate, the optimal profile length at each landmark is calculated by statistically investigating the intensity profile in the training set. The resulting gradient-PDF combined feature produces more accurate and robust segmentations than general gradient features. Second, an online learning mechanism is used to build shape and appearance statistics for accurately capturing intrapatient variation. Results: The performance of the proposed method was evaluated on 306 images of the 24 patients. Compared to traditional gradient features, the proposed gradient-PDF combination features brought 5.2% increment in the success ratio of segmentation (from 94.1% to 99.3%). To evaluate the effectiveness of online learning mechanism, the authors carried out a comparison between partial online update strategy and full online update strategy. Using the full online update strategy, the mean DSC was improved from 86.6% to 89.3% with 2.8% gain. On the basis of full online update strategy, the manual modification before online update strategy was introduced and tested, the best performance was obtained; here, the mean DSC and the mean ASD achieved 92.4% and 1.47 mm, respectively. Conclusions: The proposed prostate segmentation method provided accurate and robust segmentation results for CT images even under the situation where the samples of patient under radiotherapy were limited. A conclusion that the proposed method is suitable for clinical application can be drawn.

Feng, Qianjin; Foskey, Mark; Chen Wufan; Shen Dinggang [Biomedical Engineering College, South Medical University, Guangzhou (China) and Department of Radiology, University of North Carolina, Chapel Hill, North Carolina 27510 (United States); Department of Radiation Oncology, University of North Carolina, Chapel Hill, North Carolina 27599 (United States); Biomedical Engineering College, South Medical University, Guangzhou 510510 (China); Department of Radiology, University of North Carolina, Chapel Hill, North Carolina 27510 (United States)

2010-08-15T23:59:59.000Z

2

Crop to wild introgression in lettuce: following the fate of crop genome segments in backcross populations  

E-Print Network (OSTI)

article as: Uwimana et al. : Crop to wild introgression infollowing the fate of crop genome segments in backcrossto the wild parent reduces the crop genome content in amount

2012-01-01T23:59:59.000Z

3

Mon. Not. R. Astron. Soc. 392, 91103 (2009) doi:10.1111/j.1365-2966.2008.14063.x Low-luminosity gamma-ray bursts as a distinct GRB population: a firmer  

E-Print Network (OSTI)

-luminosity gamma-ray bursts as a distinct GRB population: a firmer case from multiple criteria constraints-BeppoSAX gamma-ray burst GRB 980425, both with much lower luminosity and redshift compared to other observed Gamma-ray Observatory (CGRO)/BATSE and Swift/BAT and the redshift-known gamma-ray burst (GRB) sample, we

Zhang, Bing

4

Type 2 segmental glomangiomas  

E-Print Network (OSTI)

skin disorders: different types of severitiy reflectevidence for dichotomous types of severitiy. Arch Dermatol9. Happle R, König A. Type 2 segmental manifestation of

Hoekzema, Rick; Zonneveld, Ingrid M; Wal, Allard C van der

2010-01-01T23:59:59.000Z

5

Exploring Customer Segmentation for Utility Energy Efficiency Programs  

Science Conference Proceedings (OSTI)

Customer segmentation is a method of identifying homogeneous groups of consumers within a greater population based on common purchasing patterns and behavioral traits. This Technical Update, prepared as part of the EPRI Energy Efficiency Initiative, examines strategies and methodologies for segmentation both in the utility sector and other industries. The reports primary goals are to: (1) Examine the strengths and challenges of previous segmentation approaches developed by EPRI, (2) Understand the segmen...

2008-05-26T23:59:59.000Z

6

Bayesian Segmentation of Protein Secondary Structure  

E-Print Network (OSTI)

We present a novel method for predicting the secondary structure of a protein from its amino acid sequence. Most existing methods predict each position in turn based on a local window of residues, sliding this window along the length of the sequence. In contrast, we develop a probabilistic model of protein sequence/structure relationships in terms of structural segments, and formulate secondary structure prediction as a general Bayesian inference problem. A distinctive feature of our approach is the ability to develop explicit probabilistic models for -helices, -strands, and other classes of secondary structure, incorporating experimentally and empirically observed aspects of protein structure such as helical capping signals, side chain correlations, and segment length distributions. Our model is Markovian in the segments, permitting ef# cient exact calculation of the posterior probability distribution over all possible segmentations of the sequence using dynamic programming. The optimal segmentation is computed and compared to a predictor based on marginal posterior modes, and the latter is shown to provide signi# cant improvement in predictive accuracy. The marginalization procedure provides exact secondary structure probabilities at each sequence position, which are shown to be reliable estimates of prediction uncertainty. We apply this model to a database of 452 nonhomologous structures, achieving accuracies as high as the best currently available methods. We conclude by discussing an extension of this framework to model nonlocal interactions in protein structures, providing a possible direction for future improvements in secondary structure prediction accuracy.

Scott C. Schmidler; Jun S. Liu; Douglas L. Brutlag

2000-01-01T23:59:59.000Z

7

Government Facilities Segment Analysis  

Science Conference Proceedings (OSTI)

Federal, state, and local governments own or lease an estimated 1.2 million buildings and facilities in the United States. These facilities are an important -- and often overlooked -- customer segment for all energy and energy service providers.

1998-12-19T23:59:59.000Z

8

Segmentally Constructed Prestressed Concrete  

E-Print Network (OSTI)

Segmentally Constructed Prestressed Concrete Hyperboloid Cooling Tower Saml H. Rizkalla Assistant large capacity power plant facilities, the natural draft cooling tower in the fonn of a thin shell concrete natural draft cooling towers is expensive and time-consuming. The cost of the structure

9

Analysis of pharmacogenetic traits in two distinct South African populations  

E-Print Network (OSTI)

PUBLICATIONS 1479 –7364. HUMAN GENOMICS. VOL 5. NO 4. 265 –PUBLICATIONS 1479– 7364. HUMAN GENOMICS. VOL 5. NO 4. 265 –PUBLICATIONS 1479– 7364. HUMAN GENOMICS. VOL 5. NO 4. 265 –

Ikediobi, Ogechi; Aouizerat, Bradley; Xiao, Yuanyuan; Gandhi, Monica; Gebhardt, Stefan; Warnich, Louise

2011-01-01T23:59:59.000Z

10

Segmented rail linear induction motor  

DOE Patents (OSTI)

A segmented rail linear induction motor has a segmented rail consisting of a plurality of nonferrous electrically conductive segments aligned along a guideway. The motor further includes a carriage including at least one pair of opposed coils fastened to the carriage for moving the carriage. A power source applies an electric current to the coils to induce currents in the conductive surfaces to repel the coils from adjacent edges of the conductive surfaces.

Cowan, Jr., Maynard (1107 Stagecoach Rd. SE., Albuquerque, NM 87123); Marder, Barry M. (1412 Pinnacle View Dr. NE., Albuquerque, NM 87123)

1996-01-01T23:59:59.000Z

11

Segmented rail linear induction motor  

DOE Patents (OSTI)

A segmented rail linear induction motor has a segmented rail consisting of a plurality of nonferrous electrically conductive segments aligned along a guideway. The motor further includes a carriage including at least one pair of opposed coils fastened to the carriage for moving the carriage. A power source applies an electric current to the coils to induce currents in the conductive surfaces to repel the coils from adjacent edges of the conductive surfaces. 6 figs.

Cowan, M. Jr.; Marder, B.M.

1996-09-03T23:59:59.000Z

12

Segmented heat exchanger  

DOE Patents (OSTI)

A segmented heat exchanger system for transferring heat energy from an exhaust fluid to a working fluid. The heat exchanger system may include a first heat exchanger for receiving incoming working fluid and the exhaust fluid. The working fluid and exhaust fluid may travel through at least a portion of the first heat exchanger in a parallel flow configuration. In addition, the heat exchanger system may include a second heat exchanger for receiving working fluid from the first heat exchanger and exhaust fluid from a third heat exchanger. The working fluid and exhaust fluid may travel through at least a portion of the second heat exchanger in a counter flow configuration. Furthermore, the heat exchanger system may include a third heat exchanger for receiving working fluid from the second heat exchanger and exhaust fluid from the first heat exchanger. The working fluid and exhaust fluid may travel through at least a portion of the third heat exchanger in a parallel flow configuration.

Baldwin, Darryl Dean (Lafayette, IN); Willi, Martin Leo (Dunlap, IL); Fiveland, Scott Byron (Metamara, IL); Timmons, Kristine Ann (Chillicothe, IL)

2010-12-14T23:59:59.000Z

13

Optimal segmentation and packaging process  

DOE Patents (OSTI)

A process for improving packaging efficiency uses three dimensional, computer simulated models with various optimization algorithms to determine the optimal segmentation process and packaging configurations based on constraints including container limitations. The present invention is applied to a process for decontaminating, decommissioning (D&D), and remediating a nuclear facility involving the segmentation and packaging of contaminated items in waste containers in order to minimize the number of cuts, maximize packaging density, and reduce worker radiation exposure. A three-dimensional, computer simulated, facility model of the contaminated items are created. The contaminated items are differentiated. The optimal location, orientation and sequence of the segmentation and packaging of the contaminated items is determined using the simulated model, the algorithms, and various constraints including container limitations. The cut locations and orientations are transposed to the simulated model. The contaminated items are actually segmented and packaged. The segmentation and packaging may be simulated beforehand. In addition, the contaminated items may be cataloged and recorded.

Kostelnik, Kevin M. (Idaho Falls, ID); Meservey, Richard H. (Idaho Falls, ID); Landon, Mark D. (Idaho Falls, ID)

1999-01-01T23:59:59.000Z

14

Gravitational waves with distinct wavefronts  

E-Print Network (OSTI)

Exact solutions of Einstein's vacuum equations are considered which describe gravitational waves with distinct wavefronts. A family of such solutions presented recently in which the wavefronts have various geometries and which propagate into a number of physically significant backgrounds is here related to an integral representation which is a generalisation of the Rosen pulse solution for cylindrical waves. A nondiagonal solution is also constructed which is a generalisation of the Rosen pulse, being a cylindrical pulse wave with two states of polarization propagating into a Minkowski background. The solution is given in a complete and explicit form. A further generalisation to include electromagnetic waves with a distinct wavefront of the same type is also discussed.

G A Alekseev; J B Griffiths

1997-07-22T23:59:59.000Z

15

Segmenting the mature travel market by motivation  

Science Conference Proceedings (OSTI)

The purpose of this study was to segment mature travellers based on their motivations and to profile the similarities and differences between mature travel market segments according to their sociodemographic and travel-related characteristics. A ... Keywords: USA, United States, cluster analysis, data analysis, educational travellers, factor analysis, mature markets, mature travellers, personal travellers, segmentation, social travellers, sociodemographics, travel market segments, travel motivation

Yawei Wang; Yanli Zhang; John Xia; Zhongxian Wang

2008-11-01T23:59:59.000Z

16

Slap Fingerprint Segmentation Evaluation 2004 API ...  

Science Conference Proceedings (OSTI)

API Specification. Overview. The Slap Fingerprint Segmentation Evaluation 2004 will investigate the accuracy of fingerprint ...

2010-11-18T23:59:59.000Z

17

Game-Theoretic Integration for Image Segmentation  

Science Conference Proceedings (OSTI)

Abstract¿Robust segmentation of structures from an image is essential for a variety of image analysis problems. However, the conventional methods of region-based segmentation and gradient-based boundary finding are often frustrated by poor image quality. ... Keywords: Image segmentation, integration, game theory, boundary finding, region-based segmentation, MRF.

Amit Chakraborty; James S. Duncan

1999-01-01T23:59:59.000Z

18

Optimal segmentation and packaging process  

DOE Patents (OSTI)

A process for improving packaging efficiency uses three dimensional, computer simulated models with various optimization algorithms to determine the optimal segmentation process and packaging configurations based on constraints including container limitations. The present invention is applied to a process for decontaminating, decommissioning (D and D), and remediating a nuclear facility involving the segmentation and packaging of contaminated items in waste containers in order to minimize the number of cuts, maximize packaging density, and reduce worker radiation exposure. A three-dimensional, computer simulated, facility model of the contaminated items are created. The contaminated items are differentiated. The optimal location, orientation and sequence of the segmentation and packaging of the contaminated items is determined using the simulated model, the algorithms, and various constraints including container limitations. The cut locations and orientations are transposed to the simulated model. The contaminated items are actually segmented and packaged. The segmentation and packaging may be simulated beforehand. In addition, the contaminated items may be cataloged and recorded. 3 figs.

Kostelnik, K.M.; Meservey, R.H.; Landon, M.D.

1999-08-10T23:59:59.000Z

19

Fast segmentation of large images  

Science Conference Proceedings (OSTI)

The processing of large images is a generic problem in wide area surveillance. An important difficulty is that many image processing algorithms are global rather than local and hence can be infeasible due to the required computing time or memory resources ... Keywords: algorithm, image, segmentation

David J. Crisp; Peter Perry; Nicholas J. Redding

2003-02-01T23:59:59.000Z

20

Text segmentation by clustering cohesion  

Science Conference Proceedings (OSTI)

An automatic linear text segmentation in order to detect the best topic boundaries is a difficult and very useful task in many text processing systems. Some methods have tried to solve this problem with reasonable results, but they present some drawbacks ...

Raúl Abella Pérez; José Eladio Medina Pagola

2010-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Self-Supervised Chinese Word Segmentation  

Science Conference Proceedings (OSTI)

We propose a new unsupervised training method for acquiring probability models that accurately segment Chinese character sequences into words. By constructing a core lexicon to guide unsupervised word learning, self-supervised segmentation overcomes ...

Fuchun Peng; Dale Schuurmans

2001-09-01T23:59:59.000Z

22

Preprocessing based statistical segmentation of MRA dataset  

Science Conference Proceedings (OSTI)

This paper describes a preprocessing mask technique based statistical mixture components segmentation method for extracting blood vessels from brain magnetic resonance angiography (MRA) dataset. The voxels whose intensity is high in the dataset belong ... Keywords: MIP, MRA, statistical segmentation

Fucang Jia; Shaorong Wang; Liyan Liu; Hua Li

2004-06-01T23:59:59.000Z

23

Reactor Internals Segmentation Experience Report  

Science Conference Proceedings (OSTI)

Several U.S. nuclear power plants entered decommissioning in the 1990's. Based on current information, the next group of plants will not begin this process for nearly a decade. This report provides detailed information on projects involving the segmentation of the Reactor Vessel Internal Subassemblies conducted at a number of plants undergoing decommissioning. Utilities have found this task very challenging from both a technological and radiation exposure perspective. This report documents the experience...

2007-07-10T23:59:59.000Z

24

Catalog segmentation with double constraints in business  

Science Conference Proceedings (OSTI)

Catalog segmentation is an important issue in data mining in business from the microeconomic point of view. In catalog segmentation, an enterprise tries to develop k catalogs with r products that are sent to corresponding customers in order to maximize ... Keywords: Catalog segmentation, Customer-oriented, DCCSP, Profit constraint

Xiujuan Xu; Yu Liu; Zhe Wang; Chunguang Zhou; Yanchun Liang

2009-03-01T23:59:59.000Z

25

Reasons to question seven segment displays  

Science Conference Proceedings (OSTI)

Seven segment number displays are ubiquitous and popular. They are simple and familiar. They seem to make economic sense, and with only seven segments they require little wiring and electronics to support. They are cheap to buy and cheap to use; they ... Keywords: calculators, dependable interaction, number display, number error, procurement, seven segment display

Harold Thimbleby

2013-04-01T23:59:59.000Z

26

Text segmentation: A topic modeling perspective  

Science Conference Proceedings (OSTI)

In this paper, the task of text segmentation is approached from a topic modeling perspective. We investigate the use of two unsupervised topic models, latent Dirichlet allocation (LDA) and multinomial mixture (MM), to segment a text into semantically ... Keywords: Dynamic programming, Latent Dirichlet allocation, Semantic information, Text segmentation, Topic modeling

Hemant Misra; François Yvon; Olivier Cappé; Joemon Jose

2011-07-01T23:59:59.000Z

27

Segmented rail linear induction motor - Energy Innovation Portal  

A segmented rail linear induction motor has a segmented rail consisting of a plurality of nonferrous electrically conductive segments aligned along a guideway. The ...

28

Segmented ceramic liner for induction furnaces  

DOE Patents (OSTI)

A non-fibrous ceramic liner for induction furnaces is provided by vertically stackable ring-shaped liner segments made of ceramic material in a light-weight cellular form. The liner segments can each be fabricated as a single unit or from a plurality of arcuate segments joined together by an interlocking mechanism. Also, the liner segments can be formed of a single ceramic material or can be constructed of multiple concentric layers with the layers being of different ceramic materials and/or cellular forms. Thermomechanically damaged liner segments are selectively replaceable in the furnace. 5 figs.

Gorin, A.H.; Holcombe, C.E.

1994-07-26T23:59:59.000Z

29

Fluidized bed boiler having a segmented grate  

DOE Patents (OSTI)

A fluidized bed furnace (10) is provided having a perforate grate (9) within a housing which supports a bed of particulate material including some combustibles. The grate is divided into a plurality of segments (E2-E6, SH1-SH5, RH1-RH5), with the airflow to each segment being independently controlled. Some of the segments have evaporating surface imbedded in the particulate material above them, while other segments are below superheater surface or reheater surface. Some of the segments (E1, E7) have no surface above them, and there are ignitor combustors (32, 34) directed to fire into the segments, for fast startup of the furnace without causing damage to any heating surface.

Waryasz, Richard E. (Longmeadow, MA)

1984-01-01T23:59:59.000Z

30

Hierarchical image segmentation for learning object priors  

Science Conference Proceedings (OSTI)

The proposed segmentation approach naturally combines experience based and image based information. The experience based information is obtained by training a classifier for each object class. For a given test image, the result of each classifier is represented as a probability map. The final segmentation is obtained with a hierarchial image segmentation algorithm that considers both the probability maps and the image features such as color and edge strength. We also utilize image region hierarchy to obtain not only local but also semi-global features as input to the classifiers. Moreover, to get robust probability maps, we take into account the region context information by averaging the probability maps over different levels of the hierarchical segmentation algorithm. The obtained segmentation results are superior to the state-of-the-art supervised image segmentation algorithms.

Prasad, Lakshman [Los Alamos National Laboratory; Yang, Xingwei [TEMPLE UNIV.; Latecki, Longin J [TEMPLE UNIV.; Li, Nan [TEMPLE UNIV.

2010-11-10T23:59:59.000Z

31

Counting Distinct Elements in a Data Stream  

Science Conference Proceedings (OSTI)

We present three algorithms to count the number of distinct elements in a data stream to within a factor of 1 ± ¿. Our algorithms improve upon known algorithms for this problem, and offer a spectrum of time/space tradeoffs.

Ziv Bar-Yossef; T. S. Jayram; Ravi Kumar; D. Sivakumar; Luca Trevisan

2002-09-01T23:59:59.000Z

32

Slap Fingerprint Segmentation Evaluation 2004 Appendix A ...  

Science Conference Proceedings (OSTI)

... files are segmented with hand (right/left) and source ... time, with hand and source left unspecified • The ... and return codes in a tab-separated format ...

2012-05-24T23:59:59.000Z

33

Segmented amplifier configurations for laser amplifier  

DOE Patents (OSTI)

An amplifier system for high power lasers, the system comprising a compact array of segments which (1) preserves high, large signal gain with improved pumping efficiency and (2) allows the total amplifier length to be shortened by as much as one order of magnitude. The system uses a three dimensional array of segments, with the plane of each segment being oriented at substantially the amplifier medium Brewster angle relative to the incident laser beam and with one or more linear arrays of flashlamps positioned between adjacent rows of amplifier segments, with the plane of the linear array of flashlamps being substantially parallel to the beam propagation direction.

Hagen, Wilhelm F. (Livermore, CA)

1979-01-01T23:59:59.000Z

34

Correspondence as energy-based segmentation  

Science Conference Proceedings (OSTI)

We pose the correspondence problem as one of energy-based segmentation. In this framework, correspondence assigns each pixel in an image to exactly one of several non-overlapping regions, and it also computes a displacement function for each region. ... Keywords: Affine, Correspondence, Energy minimization, Graph cuts, Motion, Multiway-cut, Segmentation, Stereo

Stanley T. Birchfield; Braga Natarajan; Carlo Tomasi

2007-08-01T23:59:59.000Z

35

Fast mesh segmentation using random walks  

Science Conference Proceedings (OSTI)

3D mesh models are now widely available for use in various applications. The demand for automatic model analysis and understanding is ever increasing. Mesh segmentation is an important step towards model understanding, and acts as a useful tool for different ... Keywords: interactive, mesh segmentation, random walks

Yu-Kun Lai; Shi-Min Hu; Ralph R. Martin; Paul L. Rosin

2008-06-01T23:59:59.000Z

36

Unsupervised multiscale segmentation of color images  

Science Conference Proceedings (OSTI)

This paper proposes a new multiresolution technique for color image representation and segmentation, particularly suited for noisy images. A decimated wavelet transform is initially applied to each color channel of the image, and a multiresolution representation ... Keywords: Color images, Multiresolution, Region merging, Segmentation, Watersheds, Wavelets

Cláudio Rosito Jung

2007-03-01T23:59:59.000Z

37

Automatic image segmentation optimized by bilateral filtering  

Science Conference Proceedings (OSTI)

The object-based methodology is one of the most commonly used strategies for processing high spatial resolution images. A prerequisite to object-based image analysis is image segmentation, which is normally defined as the subdivision of an image into ... Keywords: bilateral filter, image segmentation, self-calibrating framework

Javier Sanchez; Estibaliz Martinez; Agueda Arquero; Diego Renza

2010-11-01T23:59:59.000Z

38

Customer data mining for lifestyle segmentation  

Science Conference Proceedings (OSTI)

A good relationship between companies and customers is a crucial factor of competitiveness. Market segmentation is a key issue for companies to develop and maintain loyal relationships with customers as well as to promote the increase of company sales. ... Keywords: Clustering, Lifestyle, Retailing, Segmentation

V. L. Miguéis; A. S. Camanho; João Falcão e Cunha

2012-08-01T23:59:59.000Z

39

Vectorized image segmentation via trixel agglomeration  

Science Conference Proceedings (OSTI)

We present a broad algorithmic framework for transforming an image comprised of pixels into a vectorized image segmented into polygons that can be subsequently used in image analysis, understanding, and high-level representation. We introduce a new entity-the ... Keywords: Delaunay triangulation, Image segmentation, Perceptual grouping, Polygonal decomposition, Region and boundary duality, Trixel, Vectorization

Lakshman Prasad; Alexei N. Skourikhine

2006-04-01T23:59:59.000Z

40

Modified expectation maximization algorithm for MRI segmentation  

Science Conference Proceedings (OSTI)

Magnetic Resonance Image segmentation is a fundamental task in a wide variety of computed-based medical applications that support therapy, diagnostic and medical applications. In this work, spatial information is included for estimating paramaters of ... Keywords: expectation maximization algorithm, finite mixture models, magnetic resonance imaging segmentation, spatial information

Ramiro Donoso; Alejandro Veloz; Héctor Allende

2010-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Scale selection for supervised image segmentation  

Science Conference Proceedings (OSTI)

Finding the right scales for feature extraction is crucial for supervised image segmentation based on pixel classification. There are many scale selection methods in the literature; among them the one proposed by Lindeberg is widely used for image structures ... Keywords: Image segmentation, Max rule, Scale selection, Scale space theory, Supervised learning

Yan Li; David M. J. Tax; Marco Loog

2012-12-01T23:59:59.000Z

42

Evaluation for Uncertain Image Classification and Segmentation  

E-Print Network (OSTI)

Each year, numerous segmentation and classification algorithms are invented or reused to solve problems where machine vision is needed. Generally, the efficiency of these algorithms is compared against the results given by one or many human experts. However, in many situations, the location of the real boundaries of the objects as well as their classes are not known with certainty by the human experts. Furthermore, only one aspect of the segmentation and classification problem is generally evaluated. In this paper we present a new evaluation method for classification and segmentation of image, where we take into account both the classification and segmentation results as well as the level of certainty given by the experts. As a concrete example of our method, we evaluate an automatic seabed characterization algorithm based on sonar images.

Martin, Arnaud; Arnold-Bos, Andreas

2008-01-01T23:59:59.000Z

43

Unsupervised image segmentation using markov random fields  

Science Conference Proceedings (OSTI)

In this study, we carried out an unsupervised gray level image segmentation based on Markov Random Fields (MRF) model. First, we use the Expectation Maximization (EM) algorithm to estimate the distribution of the input image and the number of ...

Abdulkadir ?engür; ?brahim Türko?lu; M. Cevdet ?nce

2005-06-01T23:59:59.000Z

44

Segmenting consumers using smart meter data  

Science Conference Proceedings (OSTI)

Existing electricity market segmentation analysis techniques only make use of limited consumption statistics (usually averages and variances). In this paper we use power demand distributions (PDDs) obtained from fine-grain smart meter data to perform ...

Adrian Albert; Ram Rajagopal; Raffi Sevlian

2011-11-01T23:59:59.000Z

45

Vane segment support and alignment device  

DOE Patents (OSTI)

A support and alignment assembly for supporting and aligning a vane segment is provided. The support and alignment assembly comprises a torque plate which defines an opening for receiving an eccentric pin and a locking end member for receiving a lock socket member. An eccentric pin adjustably supported by the torque plate opening for supporting and aligning a vane segment is provided. A lock socket member adapted to securely receive the eccentric pin and rotated therewith, and adjustably engage the torque plate locking end is provided. The lock socket member receives the eccentric pin, such that when the eccentric pin is adjusted to align the vane segment, the lock socket member engages the torque plate locking end to secure the vane segment in the desired position. 5 figs.

McLaurin, L.D.; Sizemore, J.D.

1999-07-13T23:59:59.000Z

46

Fastbus cable segment extender based on TTL  

Science Conference Proceedings (OSTI)

A method to drive a FASTBUS cable segment over long distance is described. The signal level transmitted is converted from standard FASTBUS cable segment signal to a TTL differential output; the scheme increases noise immunity. In addition, the receiver has a wide tolerance of common mode range of +/-15 V. By applying a deskewing mechanism in the extender module, we have achieved more than 10/sup 10/ transactions of FASTBUS without any error with a cable length of 100 m.

Ikeda, H.; Yamauchi, M.

1986-10-01T23:59:59.000Z

47

Rancho Seco Reactor Vessel Segmentation Experience Report  

Science Conference Proceedings (OSTI)

This report documents the approach taken by Sacramento Municipal Utility District (SMUD) in the segmentation and disposal of the Reactor Vessel from the Rancho Seco Nuclear Generating Station (RSNGS). The location of the Rancho Seco plant placed major constraints on the shipping options available for large plant components (Steam Generators and Reactor Vessel). This report details the engineering evaluations leading to the segmentation and disposal of the Reactor Vessel (RV). It describes the key element...

2008-03-18T23:59:59.000Z

48

Epistemological Distinctions Between Science and History  

E-Print Network (OSTI)

This article describes epistemological distinctions between science and history. Science investigates models of natural law using repeatable experiments as the ultimate arbiter. In contrast, history investigates past events by considering physical evidence, documentary evidence, and eyewitness testimony. Because questions of natural law are repeatably testable by any audience that exercises due experimental care, models of natural law are inherently more objective and testable with greater certainty than theories of past events.

Michael Courtney; Amy Courtney

2008-03-31T23:59:59.000Z

49

Blood vessel segmentation methodologies in retinal images - A survey  

Science Conference Proceedings (OSTI)

Retinal vessel segmentation algorithms are a fundamental component of automatic retinal disease screening systems. This work examines the blood vessel segmentation methodologies in two dimensional retinal images acquired from a fundus camera and a survey ... Keywords: Blood vessel segmentation, Image segmentation, Medical imaging, Retinal images, Retinopathy, Survey

M. M. Fraz; P. Remagnino; A. Hoppe; B. Uyyanonvara; A. R. Rudnicka; C. G. Owen; S. A. Barman

2012-10-01T23:59:59.000Z

50

Character segmentation from ancient palm leaf manuscripts in Thailand  

Science Conference Proceedings (OSTI)

This paper presents a character segmentation system from ancient palm leaf manuscripts written in ancient Thai language. This aims to develop an automated system for the digitization and processing of ancient manuscripts. In this paper, the preprocessing ... Keywords: binarization, character segmentation, document image analysis, image segmentation, text segmentation

Rapeeporn Chamchong; Chun Che Fung

2011-09-01T23:59:59.000Z

51

Improving face segmentation in thermograms using image signatures  

Science Conference Proceedings (OSTI)

The aim of this paper is to present a method for the automatic segmentation of face images captured in Long Wavelength Infrared (LWIR), allowing for a large range of face rotations and expressions. The motivation behind this effort is to enable better ... Keywords: face segmentation, human skin segmentation, image segmentation, infrared thermal

Sílvio Filipe; Luís A. Alexandre

2010-11-01T23:59:59.000Z

52

Nuclear propulsion apparatus with alternate reactor segments  

DOE Patents (OSTI)

1. Nuclear propulsion apparatus comprising: A. means for compressing incoming air; B. nuclear fission reactor means for heating said air; C. means for expanding a portion of the heated air to drive said compressing means; D. said nuclear fission reactor means being divided into a plurality of radially extending segments; E. means for directing a portion of the compressed air for heating through alternate segments of said reactor means and another portion of the compressed air for heating through the remaining segments of said reactor means; and F. means for further expanding the heated air from said drive means and the remaining heated air from said reactor means through nozzle means to effect reactive thrust on said apparatus.

Szekely, Thomas (Santa Monica, CA)

1979-04-03T23:59:59.000Z

53

Arbitrary body segmentation in static images  

Science Conference Proceedings (OSTI)

In this paper, a novel method for segmenting arbitrary human body in static images is proposed. With the body probability map obtained by the pictorial structure model, we develop a superpixel based EM-like algorithm to refine the map, which can then ... Keywords: l1 based graph cuts, Pictorial structure, Superpixel based EM algorithm

Shifeng Li; Huchuan Lu; Lei Zhang

2012-09-01T23:59:59.000Z

54

Illustrative Couinaud segmentation for ultrasound liver examinations  

Science Conference Proceedings (OSTI)

Couinaud segmentation is a widely used liver partitioning scheme for describing the spatial relation between diagnostically relevant anatomical and pathological features in the liver. In this paper, we propose a new methodology for effectively conveying ... Keywords: biomedical and medical visualization, illustrative visualization

Ola Kristoffer Øye; Dag Magne Ulvang; Odd Helge Gilja; Helwig Hauser; Ivan Viola

2011-07-01T23:59:59.000Z

55

Segmentation of cracks in shale rock  

Science Conference Proceedings (OSTI)

In this paper the use of morphological connected filters are studied for segmenting sheet- and thread-like cracks in images of shale rock. A volume formed from a stack of 2-D X-ray images is processed using 3-D attributes. The shape-preserving property ...

Erik R. Urbach; Marina Pervukhina; Leanne Bischof

2011-07-01T23:59:59.000Z

56

EVIDENCE FOR TWO DISTINCT STELLAR INITIAL MASS FUNCTIONS  

Science Conference Proceedings (OSTI)

We present velocity dispersion measurements of 20 Local Group stellar clusters (7 < log(age [yr]) <10.2) from integrated light spectra and examine the evolution of the stellar mass-to-light ratio, Y{sub *}. We find that the clusters deviate from the evolutionary tracks corresponding to simple stellar populations drawn from standard stellar initial mass functions (IMFs). The nature of this failure, in which Y{sub *} is at first underestimated and then overestimated with age, invalidates potential simple solutions involving a rescaling of either the measured masses or modeled luminosities. A range of possible shortcomings in the straightforward interpretation of the data, including subtleties arising from cluster dynamical evolution on the present-day stellar mass functions and from stellar binarity on the measured velocity dispersions, do not materially affect this conclusion given the current understanding of those effects. Independent of further conjectures regarding the origin of this problem, this result highlights a basic failing of our understanding of the integrated stellar populations of these systems. We propose the existence of two distinct IMFs, one primarily, but not exclusively, valid for older, metal-poor clusters and the other for primarily, but not exclusively, younger, metal-rich clusters. The young (log(age [yr]) < 9.5) clusters are well described by a bottom-heavy IMF, such as a Salpeter IMF, while the older clusters are better described by a top-heavy IMF, such as a light-weighted Kroupa IMF, although neither of these specific forms is a unique solution. The sample is small, with the findings currently depending on the results for four key clusters, but doubling the sample is within reach.

Zaritsky, Dennis [Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States); Colucci, Janet E.; Bernstein, Rebecca A. [Department of Astronomy and Astrophysics, 1156 High Street, UCO/Lick Observatory, University of California, Santa Cruz, CA 95064 (United States); Pessev, Peter M. [Gemini South Observatory, c/o AURA Inc., Casilla 603, La Serena (Chile); Chandar, Rupali, E-mail: dzaritsky@as.arizona.edu [Department of Physics and Astronomy, University of Toledo, 2801 West Bancroft Street, Toledo, OH 43606 (United States)

2012-12-20T23:59:59.000Z

57

Molecular analysis of endothelial progenitor cell (EPC) subtypes reveals two distinct cell populations with different identities  

E-Print Network (OSTI)

showing a low PC1 value (Figure 1D). The PCA biplot analysis highlighted some differentially expressed genes for each group; eEPC genes included HLA-DRA, CD36, CD14, and complement 1QC, while OEC genes comprised caveolin1, VE-cadherin, CD34... higher in eEPCs. Gene Annotation* Symbol Fold Change Complement component 1, q subcomponent, C chain C1QC 257.10 TYRO protein tyrosine kinase binding protein TYROBP 250.38 CD163 molecule CD163 244.85 Secreted phosphoprotein 1 SPP1 239.94 Fc fragment...

Medina, Reinhold J; O'Neill, Christina L; Sweeney, Mark; Guduric-Fuchs, Jasenka; Gardiner, Tom A; Simpson, David A; Stitt, Alan W

2010-05-13T23:59:59.000Z

58

Joint Chinese word segmentation, POS tagging and parsing  

Science Conference Proceedings (OSTI)

In this paper, we propose a novel decoding algorithm for discriminative joint Chinese word segmentation, part-of-speech (POS) tagging, and parsing. Previous work often used a pipeline method -- Chinese word segmentation followed by POS tagging and parsing, ...

Xian Qian; Yang Liu

2012-07-01T23:59:59.000Z

59

Segmentation of Satellite Imagery Using Hierarchical Thresholding and Neural Networks  

Science Conference Proceedings (OSTI)

A significant task in the automated interpretation of cloud features on satellite imagery is the segmentation of the image into separate cloud features to be identified. A new technique, hierarchical threshold segmentation (HTS), is presented. In ...

James E. Peak; Paul M. Tag

1994-05-01T23:59:59.000Z

60

Supervised probabilistic segmentation of pulmonary nodules in CT scans  

Science Conference Proceedings (OSTI)

An automatic method for lung nodule segmentation from computed tomography (CT) data is presented that is different from previous work in several respects. Firstly, it is supervised; it learns how to obtain a reliable segmentation from examples in a training ...

Bram van Ginneken

2006-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Segmentation of airway trees from multislice CT using fuzzy logic  

Science Conference Proceedings (OSTI)

The segmentation and reconstruction of the human airway tree from volumetric computed tomography (CT) images facilitates many clinical applications and physiological investigations. The main problem with standard automated region-growing segmentation ...

Tan Kok Liang; Toshiyuki Tanaka; Hidetoshi Nakamura; Toru Shirahata; Hiroaki Sugiura

2009-11-01T23:59:59.000Z

62

Segmentation par modèle déformable surfacique localement régularisé par spline lissante.  

E-Print Network (OSTI)

??La segmentation d'image par modèles déformables est une méthode permettant de localiser les frontières d'un objet. Dans le cas d'images difficiles à segmenter en raison… (more)

Velut, Jérôme

2007-01-01T23:59:59.000Z

63

Segmented nanowires displaying locally controllable properties  

DOE Patents (OSTI)

Vapor-liquid-solid growth of nanowires is tailored to achieve complex one-dimensional material geometries using phase diagrams determined for nanoscale materials. Segmented one-dimensional nanowires having constant composition display locally variable electronic band structures that are determined by the diameter of the nanowires. The unique electrical and optical properties of the segmented nanowires are exploited to form electronic and optoelectronic devices. Using gold-germanium as a model system, in situ transmission electron microscopy establishes, for nanometer-sized Au--Ge alloy drops at the tips of Ge nanowires (NWs), the parts of the phase diagram that determine their temperature-dependent equilibrium composition. The nanoscale phase diagram is then used to determine the exchange of material between the NW and the drop. The phase diagram for the nanoscale drop deviates significantly from that of the bulk alloy.

Sutter, Eli Anguelova; Sutter, Peter Werner

2013-03-05T23:59:59.000Z

64

Decommissioning: Reactor Pressure Vessel Internals Segmentation  

Science Conference Proceedings (OSTI)

Decommissioning a nuclear plant covers a wide variety of challenging projects. One of the most challenging areas is the removal and disposal of the reactor pressure vessel (RPV) and the RPV internals. This report describes commercial reactor pressure vessel segmentation projects that have been completed and discusses several projects that are still in the planning stages. The report also covers lessons learned from each project.

2001-10-11T23:59:59.000Z

65

Modified bacterial foraging algorithm based multilevel thresholding for image segmentation  

Science Conference Proceedings (OSTI)

Multilevel thresholding is one of the most popular image segmentation techniques. In order to determine the thresholds, most methods use the histogram of the image. This paper proposes multilevel thresholding for histogram-based image segmentation using ... Keywords: Bacterial foraging, Histogram, Image segmentation, Kapur's function, Multilevel thresholding, Otsu's function

P. D. Sathya; R. Kayalvizhi

2011-06-01T23:59:59.000Z

66

Knowledge based lacunas detection and segmentation for ancient paintings  

Science Conference Proceedings (OSTI)

Lacunas are a common form of the damage that can occur to paintings and more often to murals. Taking Dunhuang murals as research background, a new algorithm to detect and segment the lacuna area from mural images is proposed, which consists of a training ... Keywords: bayesian classification, concurrent detection and segmentation, deterioration murals, graph cuts, image segmentation, mean shift

Jianming Liu; Dongming Lu

2007-09-01T23:59:59.000Z

67

Automated segmentation of tissue images for computerized IHC analysis  

Science Conference Proceedings (OSTI)

This paper presents two automated methods for the segmentation of immunohistochemical tissue images that overcome the limitations of the manual approach as well as of the existing computerized techniques. The first independent method, based on unsupervised ... Keywords: Image processing, Immunohistochemistry, Nuclear segmentation, Tissue images, Tissue segmentation

S. Di Cataldo; E. Ficarra; A. Acquaviva; E. Macii

2010-10-01T23:59:59.000Z

68

A fuzzy segmentation method for Computed Tomography images  

Science Conference Proceedings (OSTI)

This paper describes a way of medical image segmentation using an appropriately defined fuzzy clustering method based on a fuzzy similarity relation. The considered relation is defined in terms of the Minkowski metric. A fuzzy similarity relation based ... Keywords: CT, computed tomography, data partitional clustering, fuzzy clustering, fuzzy segmentation, fuzzy similarity relations, image segmentation, medical imaging

Martin Tabakov

2007-04-01T23:59:59.000Z

69

Automated temporal tracking and segmentation of lymphoma on serial CT examinations  

Science Conference Proceedings (OSTI)

Purpose: It is challenging to reproducibly measure and compare cancer lesions on numerous follow-up studies; the process is time-consuming and error-prone. In this paper, we show a method to automatically and reproducibly identify and segment abnormal lymph nodes in serial computed tomography (CT) exams. Methods: Our method leverages initial identification of enlarged (abnormal) lymph nodes in the baseline scan. We then identify an approximate region for the node in the follow-up scans using nonrigid image registration. The baseline scan is also used to locate regions of normal, non-nodal tissue surrounding the lymph node and to map them onto the follow-up scans, in order to reduce the search space to locate the lymph node on the follow-up scans. Adaptive region-growing and clustering algorithms are then used to obtain the final contours for segmentation. We applied our method to 24 distinct enlarged lymph nodes at multiple time points from 14 patients. The scan at the earlier time point was used as the baseline scan to be used in evaluating the follow-up scan, resulting in 70 total test cases (e.g., a series of scans obtained at 4 time points results in 3 test cases). For each of the 70 cases, a ''reference standard'' was obtained by manual segmentation by a radiologist. Assessment according to response evaluation criteria in solid tumors (RECIST) using our method agreed with RECIST assessments made using the reference standard segmentations in all test cases, and by calculating node overlap ratio and Hausdorff distance between the computer and radiologist-generated contours. Results: Compared to the reference standard, our method made the correct RECIST assessment for all 70 cases. The average overlap ratio was 80.7 {+-} 9.7% s.d., and the average Hausdorff distance was 3.2 {+-} 1.8 mm s.d. The concordance correlation between automated and manual segmentations was 0.978 (95% confidence interval 0.962, 0.984). The 100% agreement in our sample between our method and the standard with regard to RECIST classification suggests that the true disagreement rate is no more than 6%. Conclusions: Our automated lymph node segmentation method achieves excellent overall segmentation performance and provides equivalent RECIST assessment. It potentially will be useful to streamline and improve cancer lesion measurement and tracking and to improve assessment of cancer treatment response.

Xu Jiajing; Greenspan, Hayit; Napel, Sandy; Rubin, Daniel L. [Department of Electrical Engineering, Stanford University, Stanford, California 94305 (United States); Department of Biomedical Engineering, Tel Aviv University, Tel Aviv, 69978 (Israel); Department of Electrical Engineering, Stanford University, Stanford, California 94305 and Department of Radiology, Stanford University, Stanford, California 94305 (United States); Department of Radiology, Stanford University, Stanford, California 94305 (United States)

2011-11-15T23:59:59.000Z

70

Segmentation of x-ray images using Probabilistic Relaxation Labeling  

SciTech Connect

Segmentation is a process of separating objects of interest from their background or from other objects in an image. Without a suitable segmentation scheme, it is very difficult to detect contraband in X-rays images. In this paper, a Probabilistic Relaxation Labeling (PRL) segmentation scheme is presented and compared with other segmentation methods. PRL segmentation is an interative algorithm that labels each pixel in an image by cooperative use of two information sources: the pixel probability and the degree of certainty of its probability supported by the neighboring pixels. The practical implementation and results of the PRL segmentation on X-ray baggage images are also discussed and compared with other segmentation methods. 13 refs., 12 figs.

Thai, T.Q.

1991-01-01T23:59:59.000Z

71

Segmented lasing tube for high temperature laser assembly  

DOE Patents (OSTI)

A high temperature laser assembly capable of withstanding operating temperatures in excess of 1500.degree. C. is described comprising a segmented cylindrical ceramic lasing tube having a plurality of cylindrical ceramic lasing tube segments of the same inner and outer diameters non-rigidly joined together in axial alignment; insulation of uniform thickness surround the walls of the ceramic lasing tube; a ceramic casing, preferably of quartz, surrounding the insulation; and a fluid cooled metal jacket surrounds the ceramic casing. In a preferred embodiment, the inner surface of each of the ceramic lasing tube segments are provided with a pair of oppositely spaced grooves in the wall thereof parallel to the center axis of the segmented cylindrical ceramic lasing tube, and both of the grooves and the center axis of the segmented cylindrical ceramic lasing tube lie in a common plane, with the grooves in each ceramic lasing tube segment in circumferential alignment with the grooves in the adjoining ceramic lasing tube segments; and one or more ceramic plates, all lying in a common plane to one another and with the central axis of the segmented ceramic lasing tube, are received in the grooves to provide additional wall area in the segmented ceramic lasing tube for collision and return to ground state of metastable metal atoms within the segmented ceramic lasing tube.

Sawicki, Richard H. (Danville, CA); Alger, Terry W. (Tracy, CA); Finucane, Raymond G. (Pleasanton, CA); Hall, Jerome P. (Livermore, CA)

1996-01-01T23:59:59.000Z

72

Segmentation of historical machine-printed documents using Adaptive Run Length Smoothing and skeleton segmentation paths  

E-Print Network (OSTI)

of the valuable historical collections. In order to achieve accu- rate recognition results, a robust and efficientSegmentation of historical machine-printed documents using Adaptive Run Length Smoothing Stamatopoulos b , Nikos Papamarkos a a Department of Electrical and Computer Engineering, Democritus University

Gatos, Basilios

73

Facts and Distinctions 2012 College of Agricultural and Environmental Sciences  

E-Print Network (OSTI)

Facts and Distinctions 2012 College of Agricultural and Environmental Sciences University, and an improved standard of living for everyone. Distinctions National Program Ranking Agricultural sciences program 1 1 Agriculture / Agronomy 1 1 Entomology program 3 1 Environment / Ecology 1 1 Food science

Hammock, Bruce D.

74

Design and operations of Hall thruster with segmented electrodes  

DOE Green Energy (OSTI)

Principles of the Hall thruster with segmented electrodes are explored. A suitable vacuum facility was put into service. For purposes of comparison between segmented and conventional thruster approaches, a modular laboratory prototype thruster was designed and built. Under conventional operation, the thruster achieves state-of-the-art efficiencies (56% at 300 V and 890 W). Very preliminary results under operation with segmented electrodes are also described.

Fisch, N.J.; Raitses, Y.; Dorf, L.A.; Litvak, A.A.

1999-12-10T23:59:59.000Z

75

Effect of a plume reduction in segmented electrode Hall thruster  

DOE Green Energy (OSTI)

A segmented electrode, which is placed at the thruster exit, is shown to affect thruster operation in several ways, whether the electrode produce low emission current or no emission current, although there appear to be advantages to the more emissive segmented electrode. Measured by plume divergence, the performance of Hall thruster operation, even with only one power supply, can approach or surpass that of non segmented operation over a range of parameter regimes, including the low gas rate regime. This allows the flexibility in operation of segmented electrode thrusters in variable thrust regimes.

Raitses, Y.; Dorf, L.A.; Livak, A.A.; Fisch, N.J.

2000-01-27T23:59:59.000Z

76

A Bayesian Approach for Image Segmentation with Shape Priors  

E-Print Network (OSTI)

Gibbs distribution and the Bayesian restoration of images.A Bayesian Approach for Image Segmentation with Shapeshape prior models within a Bayesian framework. Interactive

Chang, Hang

2009-01-01T23:59:59.000Z

77

Blocked and recovered memories of affective, distinctive, and neutral paragraphs  

E-Print Network (OSTI)

Highly affective memories have been thought to be longer lasting and more detailed than other memories, and many experimental results have supported this assertion. The apparent robustness of these memories, however, may result from their high distinctiveness, rather than their emotional content. Two experiments tested free and cued recall for negative affect, distinctive, and neutral paragraphs. Experiment 1 compared neutral and negative affect paragraphs using a blocked and recovered memory technique. Affective paragraphs were remembered significantly better than neutral paragraphs in free recall of paragraph titles, regardless of condition. Details of neutral paragraphs were remembered significantly better than affective paragraphs, regardless of condition. No recovery effect was found. Experiment 2 compared distinctive and neutral paragraphs using the same technique. Free recall of paragraph titles did not differ between paragraph types. Neutral paragraphs were remembered better than distinctive paragraphs in cued recall, regardless of condition. Participants remembered significantly more with cued recall, and significantly more in the forget condition, and distinctive paragraphs were subject to a much greater forgetting effect than neutral paragraphs. It is unclear why a robust forgetting effect, using these stimuli, was not found. Consistent with previous literature, affective stimuli were remembered well, but inconsistently, distinctive stimuli were not. These results provide support for the claim that negative affect memories are more robust than other memories. This may result from their inherent emotional content as opposed to their being distinctive in some way.

Corbisier, Barbara Lynn

2007-05-01T23:59:59.000Z

78

Distinct Modes of the East Asian Winter Monsoon  

Science Conference Proceedings (OSTI)

Two distinct modes of the East Asian winter monsoon (EAWM) have been identified, and they correspond to real and imaginary parts of the leading mode of the EAWM, respectively. Analyses of these modes used the National Centers for Environment ...

Bingyi Wu; Renhe Zhang; Rosanne D’Arrigo

2006-08-01T23:59:59.000Z

79

Distinct Hydrological Signatures in Observed Historical Temperature Fields  

Science Conference Proceedings (OSTI)

In an atmospheric general circulation model (AGCM), the physical bounds on soil moisture content and the nonlinear relationship between soil moisture and evaporation lead to distinct geographical patterns in key surface energy and water balance ...

Randal D. Koster; Max J. Suarez; Siegfried D. Schubert

2006-10-01T23:59:59.000Z

80

Retinal vessel segmentation using multiwavelet kernels and multiscale hierarchical decomposition  

Science Conference Proceedings (OSTI)

We propose a comprehensive method for segmenting the retinal vasculature in fundus camera images. Our method does not require preprocessing and training and can therefore be used directly on different images sets. We enhance the vessels using matched ... Keywords: Matched filter, Multiscale hierarchical decomposition, Multiwavelet, Retinal images, Segmentation, Vessel detection

Yangfan Wang; Guangrong Ji; Ping Lin; Emanuele Trucco

2013-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Image segmentation by iterated region merging with localized graph cuts  

Science Conference Proceedings (OSTI)

This paper presents an iterated region merging-based graph cuts algorithm which is a novel extension of the standard graph cuts algorithm. Graph cuts addresses segmentation in an optimization framework and finds a globally optimal solution to a wide ... Keywords: Graph cuts, Image segmentation, Region merging

Bo Peng; Lei Zhang; David Zhang; Jian Yang

2011-10-01T23:59:59.000Z

82

Parallel version of image segmentation algorithm using polygonal markov fields  

Science Conference Proceedings (OSTI)

In this paper we present an application of parallel simulated annealing method to a segmentation algorithm using polygonal Markov fields. After a brief presentation of the algorithm and a general scheme of parallelization methods using simulated annealing ... Keywords: image segmentation, parallel simulated annealing, polygonal Markov field

Rafa? Kluszczy?ski; Piotr Ba?a

2011-09-01T23:59:59.000Z

83

A Quaternion Framework for Color Image Smoothing and Segmentation  

Science Conference Proceedings (OSTI)

In this paper, we present feature/detail preserving models for color image smoothing and segmentation using the Hamiltonian quaternion framework. First, we introduce a novel quaternionic Gabor filter (QGF) which can combine the color channels and the ... Keywords: Color image segmentation, Color image smoothing, Continuous mixture models, Directional distributions, Matrix-Fisher distribution, Quaternion Gabor filter, Quaternions, Watson distribution, von Mises distribution

Özlem N. Subakan; Baba C. Vemuri

2011-02-01T23:59:59.000Z

84

Comparison of Segmentation Algorithms For Fluorescence Microscopy Images of Cells  

E-Print Network (OSTI)

Comparison of Segmentation Algorithms For Fluorescence Microscopy Images of Cells Alden A. Dima,1 Mary C. Brady,1 Hai C. Tang,1 Anne L. Plant2 * Abstract The analysis of fluorescence microscopy fluorescence microscopy; k-means cluster; image segmentation; cell edge; bivariate simi- larity index NUMEROUS

Bernal, Javier

85

Color image segmentation by means of a similarity function  

Science Conference Proceedings (OSTI)

An interactive, semiautomatic image segmentation method is presented which, unlike most of the existing methods in the published literature, processes the color information of each pixel as a unit, thus avoiding color information scattering. The process ... Keywords: HSI parameter distances, adaptive color similarity function, color image segmentation, morphology in color images

Rodolfo Alvarado-Cervantes; Edgardo M. Felipe-Riveron; Luis P. Sanchez-Fernandez

2010-11-01T23:59:59.000Z

86

Segmentation of medical images using a genetic algorithm  

Science Conference Proceedings (OSTI)

Segmentation of medical images is challenging due to poor image contrast and artifacts that result in missing or diffuse organ/tissue boundaries. Consequently, this task involves incorporating as much prior information as possible (e.g., texture, shape, ... Keywords: genetic algorithms, level set methods, texture segmentation

Payel Ghosh; Melanie Mitchell

2006-07-01T23:59:59.000Z

87

A Bayesian Approach for Image Segmentation with Shape Priors  

SciTech Connect

Color and texture have been widely used in image segmentation; however, their performance is often hindered by scene ambiguities, overlapping objects, or missingparts. In this paper, we propose an interactive image segmentation approach with shape prior models within a Bayesian framework. Interactive features, through mouse strokes, reduce ambiguities, and the incorporation of shape priors enhances quality of the segmentation where color and/or texture are not solely adequate. The novelties of our approach are in (i) formulating the segmentation problem in a well-de?ned Bayesian framework with multiple shape priors, (ii) ef?ciently estimating parameters of the Bayesian model, and (iii) multi-object segmentation through user-speci?ed priors. We demonstrate the effectiveness of our method on a set of natural and synthetic images.

Chang, Hang; Yang, Qing; Parvin, Bahram

2008-06-20T23:59:59.000Z

88

Global Population Distribution and Urban Land Use in Geophysical Parameter Space  

Science Conference Proceedings (OSTI)

The spatial distribution of human population on the land surface is a fundamental determinant of land-use impacts on Earth's ecosystems. Census enumerations and satellite-detected night lights provide two complementary, but distinct, ...

Christopher Small

2004-06-01T23:59:59.000Z

89

The elusive minimum viable population size for white sturgeon  

SciTech Connect

Biological conservation of sturgeon populations is a concern for many species. Those responsible for managing the white sturgeon (Acipenser transmontanus) and similar species are interested in identifying extinction thresholds to avoid. Two thresholds that exist in theory are the minimum viable population size (MVP) and minimum amount of suitable habitat. In this paper, we present both model and empirical estimates of these thresholds. We modified a population viability analysis (PVA) model for white sturgeon to include two new Allee mechanisms. Despite this, PVA-based MVP estimates were unrealistically low compared with empirical estimates unless opportunities for spawning were assumed to be less frequent. PVA results revealed a trade-off between MVP and habitat thresholds; smaller populations persisted in longer river segments and vice versa. Our empirical analyses suggested (1) a MVP range based on population trends from 1,194 to 27,700 individuals, and (2) a MVP estimate of 4,000 individuals based on recruitment. Long-term historical population surveys are needed for more populations to pinpoint an MVP based on trends, whereas the available data were sufficient to estimate MVP based on recruitment. Beyond the MVP, we developed a hierarchical model for population status based on empirical data. Metapopulation support was the most important predictor of population health, followed by the length of free-flowing habitat, with habitat thresholds at 26 and 150 km. Together, these results suggest that habitat and connectivity are important determinants of population status that likely influence the site-specific MVP thresholds.

Jager, Yetta [ORNL; Lepla, Ken B. [Idaho Power Company; Van Winkle, Webb [Van Windle Environmental Consulting; James, Mr Brad [Washington Department of Fish and Wildlife; McAdam, Dr Steve [University of British Columbia, Vancouver

2010-01-01T23:59:59.000Z

90

Optimization in multi-scale segmentation of high-resolution satellite images for artificial feature recognition  

Science Conference Proceedings (OSTI)

Multi-resolution segmentation, as one of the most popular approaches in object-oriented image segmentation, has been greatly enabled by the advent of the commercial software, eCognition. However, the application of multi-resolution segmentation still ...

J. Tian; D. -M. Chen

2007-10-01T23:59:59.000Z

91

A Distinction Technique Between Volcanic And Tectonic Depression Structures  

Open Energy Info (EERE)

Distinction Technique Between Volcanic And Tectonic Depression Structures Distinction Technique Between Volcanic And Tectonic Depression Structures Based On The Restoration Modeling Of Gravity Anomaly- A Case Study Of The Hohi Volcanic Zone, Central Kyushu, Japan Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Distinction Technique Between Volcanic And Tectonic Depression Structures Based On The Restoration Modeling Of Gravity Anomaly- A Case Study Of The Hohi Volcanic Zone, Central Kyushu, Japan Details Activities (0) Areas (0) Regions (0) Abstract: In this study, we propose a numerical modeling technique which restores the gravity anomaly of tectonic origin and identifies the gravity low of caldera origin. The identification is performed just by comparing the restored gravity anomalies with the observed gravity anomalies, thus we

92

Energy implications of an aging population  

Science Conference Proceedings (OSTI)

This study provides various demographic, medical, and economic information relative to energy usage on a segment of the population, the elderly, which is growing in absolute numbers and relative population percentage. This growth is expected to continue well into the twenty-first century. The US aging population numbered 3.1 million in 1900, and by 1977 it had climbed to 23.5 million. It can be stated with reasonable certainty that this figure will rise to 31 million in the year 2000 and 43 million in the year 2020. These figures, corresponding to more than 10% of our population, are by no means insignificant. As our fossil-fuel reserves are being depleted and the cost of energy mounts, it becomes apparent that the elderly will become increasingly vulnerable to the energy crisis, primarily beause of their physical tendency to infirmity, their economic and social situation, and their susceptibility to psychological depression. This white paper concentrates on those aspects of aging and the nation's energy problem which are not usually related in our everyday consideration of these as separable problems. It seeks to identify the peculiar energy problems of the aged and to consider alternatives in the solution of these problems in light of modern technology.

Not Available

1980-08-01T23:59:59.000Z

93

Segmented instrumentation tube including a locking sleeve for interlocking the segments of the instrumentation tube  

DOE Patents (OSTI)

Segmented instrumentation tube including a locking sleeve for interlocking the segments of the instrumentation tube, so that the threaded ends of the instrumentation tube do not unthread when subjected to vibration, such an instrumentation tube being suitable for use in a nuclear reactor pressure vessel. The instrumentation tube has a first member having a threaded end portion that has a plurality of first holes circumferentially around the outside surface thereof. The instrumentation tube also has a second member having a threaded end portion that has a plurality of second holes circumferentially around the outside surface thereof. The threads of the second member are caused to threadably engage the threads of the first member for defining a threaded joint therebetween. A sleeve having an inside surface surrounds the end portion of the first member and the end portion of the second member and thus surrounds the threaded joint. The sleeve includes a plurality of first projections and second projections that outwardly extend from the inside surface to engage the first holes and the second holes, respectively. The outside surface of the sleeve is crimped or swaged at the locations of the first projections and second projections such that the first projections and the second projections engage their respective holes. In this manner, independent rotation of the first member with respect to the second member is prevented, so that the instrumentation tube will not unthread at its threaded joint.

Obermeyer, Franklin D. (Pensacola, FL)

1993-01-01T23:59:59.000Z

94

Segmented instrumentation tube including a locking sleeve for interlocking the segments of the instrumentation tube  

DOE Patents (OSTI)

Segmented instrumentation tube including a locking sleeve for interlocking the segments of the instrumentation tube, so that the threaded ends of the instrumentation tube do not unthread when subjected to vibration, such an instrumentation tube being suitable for use in a nuclear reactor pressure vessel. The instrumentation tube has a first member having a threaded end portion that has a plurality of first holes circumferentially around the outside surface thereof. The instrumentation tube also has a second member having a threaded end portion that has a plurality of second holes circumferentially around the outside surface thereof. The threads of the second member are caused to threadably engage the threads of the first member for defining a threaded joint there between. A sleeve having an inside surface surrounds the end portion of the first member and the end portion of the second member and thus surrounds the threaded joint. The sleeve includes a plurality of first projections and second projections that outwardly extend from the inside surface to engage the first holes and the second holes, respectively. The outside surface of the sleeve is crimped or swaged at the locations of the first projections and second projections such that the first projections and the second projections engage their respective holes. In this manner, independent rotation of the first member with respect to the second member is prevented, so that the instrumentation tube will not unthread at its threaded joint. 10 figures.

Obermeyer, F.D.

1993-11-16T23:59:59.000Z

95

Character Segmentation in Highly Blurred Ancient Printed Documents  

Science Conference Proceedings (OSTI)

Character segmentation, which is a fundamental preliminary step for character recognition, is particularly critic in the case of ancient printed documents, where several degradation processes may cause the characters to touch and merge one another. In ...

Anna Tonazzini; Luigi Bedini

1999-09-01T23:59:59.000Z

96

EIA - Natural Gas Pipeline Network - Interstate Pipelines Segment  

Gasoline and Diesel Fuel Update (EIA)

Home > Natural Gas > About U.S. Natural Gas Pipelines > Interstate Natural Gas Pipeline Segment About U.S. Natural Gas Pipelines - Transporting Natural Gas based on data through...

97

Monitoring transient repolarization segment morphology deviations in mouse ECG  

E-Print Network (OSTI)

This thesis details the design, implementation and validation of a system that facilitates partial automation for detection of anomalous repolarization segment morphologies in the ECG of mice. The technology consists of ...

Oefinger, Matthew Blake, 1976-

2006-01-01T23:59:59.000Z

98

SAR Imagery Segmentation by Statistical Region Growing and Hierarchical Merging  

SciTech Connect

This paper presents an approach to accomplish synthetic aperture radar (SAR) image segmentation, which are corrupted by speckle noise. Some ordinary segmentation techniques may require speckle filtering previously. Our approach performs radar image segmentation using the original noisy pixels as input data, eliminating preprocessing steps, an advantage over most of the current methods. The algorithm comprises a statistical region growing procedure combined with hierarchical region merging to extract regions of interest from SAR images. The region growing step over-segments the input image to enable region aggregation by employing a combination of the Kolmogorov-Smirnov (KS) test with a hierarchical stepwise optimization (HSWO) algorithm for the process coordination. We have tested and assessed the proposed technique on artificially speckled image and real SAR data containing different types of targets.

Ushizima, Daniela Mayumi; Carvalho, E.A.; Medeiros, F.N.S.; Martins, C.I.O.; Marques, R.C.P.; Oliveira, I.N.S.

2010-05-22T23:59:59.000Z

99

Effects of Segmented Electrode in Hall Current Plasma Thrusters  

DOE Green Energy (OSTI)

Segmented electrodes with a low secondary electron emission are shown to alter significantly plasma flow in the ceramic channel of the Hall thruster. The location of the axial acceleration region relative to the magnetic field can be moved. The radial potential distribution can also be altered near the channel walls. A hydrodynamic model shows that these effects are consistent with a lower secondary electron emission of the segmented electrode as compared to ceramic channel walls.

Y. Raitses; M. Keidar; D. Staack; N.J. Fisch

2001-12-03T23:59:59.000Z

100

Baum-Welch Training for Segment-Based Speech Recognition  

E-Print Network (OSTI)

The use of segment-based features and segmentation networks in a segment-based speec recflfl3O66 ccflfl3O66) the probabilistic modelingbecl se it alters the sample spac of all possible segmentation paths and the feature observation spac6 This paperdesc35 es a novel Baum-Welc training algorithm for segment-based speec recfl83O6%5 whic addresses these issues by an innovative use of finite-state transducs3 . Thisproc5flH( has the desirable property of not requiring initial seed models that were needed by the Viterbi trainingprocng35 we have used previously. On the PhoneBook telephone-basedc35(R of read, isolated words, the Baum-Welc training algorithm obtained a relative error reduc(3O of 37% on the training set and a relative error reducH3O of 5% on the test set,ct,3fl%6 to Viterbi trained models. Whencn358%% with a duration model, and more flexible segmentation network, the Baum-Welc trained models obtain an overall word error rate of 7.6%, whic is the best result we have seen published for the 8,000 word task. 1.

Han Shu; I. LM Hetherington; I. Lee Hetherington; James Glass

2003-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Magnetic mirror fusion systems: Characteristics and distinctive features  

SciTech Connect

A tutorial account is given of the main characteristics and distinctive features of conceptual magnetic fusion systems employing the magnetic mirror principle. These features are related to the potential advantages that mirror-based fusion systems may exhibit for the generation of economic fusion power.

Post, R.F.

1987-08-10T23:59:59.000Z

102

Automatic segmentation of human facial tissue by MRI-CT fusion: A feasibility study  

Science Conference Proceedings (OSTI)

The aim of this study was to develop automatic image segmentation methods to segment human facial tissue which contains very thin anatomic structures. The segmentation output can be used to construct a more realistic human face model for a variety of ... Keywords: Bayesian, Data fusion, Human facial tissue, Level Sets, Medical image segmentation, Partial volume

Emre H. Kale; Erkan U. Mumcuoglu; Salih Hamcan

2012-12-01T23:59:59.000Z

103

Motion-Based Selection of Relevant Video Segments for Video Summarization  

Science Conference Proceedings (OSTI)

We present a method for motion-based video segmentation and segment classification as a step towards video summarization. The sequential segmentation of the video is performed by detecting changes in the dominant image motion, assumed to be related to ... Keywords: probabilistic motion modelling, supervised event classification, video segmentation

Nathalie Peyrard; Patrick Bouthemy

2005-08-01T23:59:59.000Z

104

Population | OpenEI  

Open Energy Info (EERE)

Population Population Dataset Summary Description Total population (in millions) by country, 1980 to 2010. Compiled by Energy Information Administration (EIA). Source EIA Date Released Unknown Date Updated Unknown Keywords EIA Population world Data text/csv icon population_by_country_1980_2010millions.csv (csv, 59.1 KiB) Quality Metrics Level of Review Peer Reviewed Comment Temporal and Spatial Coverage Frequency Time Period 1980 - 2010 License License Other or unspecified, see optional comment below Comment Rate this dataset Usefulness of the metadata Average vote Your vote Usefulness of the dataset Average vote Your vote Ease of access Average vote Your vote Overall rating Average vote Your vote Comments Login or register to post comments If you rate this dataset, your published comment will include your rating.

105

Segmentation strategies for the irradiated and tritium contaminated PPPL TFTR  

Science Conference Proceedings (OSTI)

The Tokamak Fusion Test Reactor (TFTR) at Princeton Plasma Physics Laboratory is scheduled to complete its final experiments in the Fall of 1995. As a result, the TFTR will be activated and tritium contaminated. After the experiments are complete, the TFTR will undergo Shutdown and Removal (S and R). The space vacated by the TFTR will be used for a new test reactor, the Tokamak Physics Experiment (TPX). Remote methods may be required to remove components and to segment the Vacuum Vessel. The TFTR has been studied to determine alternatives for the segmentation of the Vacuum Vessel from the inside (In-Vessel). The methodology to determine suitable strategies to segment the Vacuum Vessel from In-Vessel included several areas of concentration. These areas were segmentation locations, cutting/removal technologies, pros and cons, and cutting/removal technology delivery systems. The segmentation locations for easiest implementation and minimal steps in cutting and removal have been identified. Each of these will also achieve the baseline for packaging and shipment. The methods for cutting and removal of components were determined. In addition, the delivery systems were conceptualized.

Walton, G.R. [Princeton Univ., NJ (United States). Plasma Physics Lab.; Litka, T.J. [Advanced Consulting Group, Inc., Chicago, IL (United States); Spampinato, P.T. [RHD Consultants, Inc., Princeton, NJ (United States)

1995-02-09T23:59:59.000Z

106

Image segmentation by hierarchial agglomeration of polygons using ecological statistics  

DOE Patents (OSTI)

A method for rapid hierarchical image segmentation based on perceptually driven contour completion and scene statistics is disclosed. The method begins with an initial fine-scale segmentation of an image, such as obtained by perceptual completion of partial contours into polygonal regions using region-contour correspondences established by Delaunay triangulation of edge pixels as implemented in VISTA. The resulting polygons are analyzed with respect to their size and color/intensity distributions and the structural properties of their boundaries. Statistical estimates of granularity of size, similarity of color, texture, and saliency of intervening boundaries are computed and formulated into logical (Boolean) predicates. The combined satisfiability of these Boolean predicates by a pair of adjacent polygons at a given segmentation level qualifies them for merging into a larger polygon representing a coarser, larger-scale feature of the pixel image and collectively obtains the next level of polygonal segments in a hierarchy of fine-to-coarse segmentations. The iterative application of this process precipitates textured regions as polygons with highly convolved boundaries and helps distinguish them from objects which typically have more regular boundaries. The method yields a multiscale decomposition of an image into constituent features that enjoy a hierarchical relationship with features at finer and coarser scales. This provides a traversable graph structure from which feature content and context in terms of other features can be derived, aiding in automated image understanding tasks. The method disclosed is highly efficient and can be used to decompose and analyze large images.

Prasad, Lakshman; Swaminarayan, Sriram

2013-04-23T23:59:59.000Z

107

Technical Safety Requirements for the B695 Segment  

Science Conference Proceedings (OSTI)

This document contains Technical Safety Requirements (TSRs) for the Radioactive and Hazardous Waste Management (RHWM) Division's B695 Segment of the Decontamination and Waste Treatment Facility (DWTF) at Lawrence Livermore National Laboratory (LLNL). The TSRs constitute requirements regarding the safe operation of the B695 Segment. The TSRs are derived from the Documented Safety Analysis (DSA) for the B695 Segment (LLNL 2007). The analysis presented there determined that the B695 Segment is a low-chemical hazard, Hazard Category 3, nonreactor nuclear facility. The TSRs consist primarily of inventory limits as well as controls to preserve the underlying assumptions in the hazard analyses. Furthermore, appropriate commitments to safety programs are presented in the administrative controls section of the TSRs. The B695 Segment (B695 and the west portion of B696) is a waste treatment and storage facility located in the northeast quadrant of the LLNL main site. The approximate area and boundary of the B695 Segment are shown in the B695 Segment DSA. Activities typically conducted in the B695 Segment include container storage, lab-packing, repacking, overpacking, bulking, sampling, waste transfer, and waste treatment. B695 is used to store and treat radioactive, mixed, and hazardous waste, and it also contains equipment used in conjunction with waste processing operations to treat various liquid and solid wastes. The portion of the building called Building 696 Solid Waste Processing Area (SWPA), also referred to as B696S in this report, is used primarily to manage solid radioactive, mixed, and hazardous waste. Operations specific to the SWPA include sorting and segregating waste, lab-packing, sampling, and crushing empty drums that previously contained waste. Furthermore, a Waste Packaging Unit will be permitted to treat hazardous and mixed waste. RHWM generally processes LLW with no, or extremely low, concentrations of transuranics (i.e., much less than 100 nCi/g). Wastes processed often contain only depleted uranium and beta- and gamma-emitting nuclides, e.g., {sup 90}Sr, {sup 137}Cs, {sup 3}H. Chapter 5 of the DSA documents the derivation of TSRs and develops the operational limits that protect the safety envelope defined for this facility. The DSA is applicable to the handling of radioactive waste stored and treated in the B695 Segment. Section 5 of the TSR, Administrative Controls, contains those Administrative Controls necessary to ensure safe operation of the B695 Segment. A basis explanation for each of the requirements described in Section 5.5, Specific Administrative Controls is provided in Appendix B. The basis explanation does not constitute an additional requirement, but is intended as an expansion of the logic and reasoning behind development of the requirement. Programmatic Administrative Controls are addressed in Section 5.6. This introduction to the B695 Segment TSRs is not part of the TSR limits or conditions and contains no requirements related to B695 Segment operations or to the safety analyses in the DSA.

Laycak, D

2008-09-11T23:59:59.000Z

108

Active Fault Segments As Potential Earthquake Sources- Inferences From  

Open Energy Info (EERE)

Active Fault Segments As Potential Earthquake Sources- Inferences From Active Fault Segments As Potential Earthquake Sources- Inferences From Integrated Geophysical Mapping Of The Magadi Fault System, Southern Kenya Rift Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Active Fault Segments As Potential Earthquake Sources- Inferences From Integrated Geophysical Mapping Of The Magadi Fault System, Southern Kenya Rift Details Activities (0) Areas (0) Regions (0) Abstract: Southern Kenya Rift has been known as a region of high geodynamic activity expressed by recent volcanism, geothermal activity and high rate of seismicity. The active faults that host these activities have not been investigated to determine their subsurface geometry, faulting intensity and constituents (fluids, sediments) for proper characterization of tectonic

109

Segmented inlet nozzle for gas turbine, and methods of installation  

SciTech Connect

A gas turbine nozzle guide vane assembly is formed of individual arcuate nozzle segments. The arcuate nozzle segments are elastically joined to each other to form a complete ring, with edges abutted to prevent leakage. The resultant nozzle ring is included within the overall gas turbine stationary structure and secured by a mounting arrangement which permits relative radial movement at both the inner and outer mountings. A spline-type outer mounting provides circumferential retention. A complete rigid nozzle ring with freedom to "float" radially results. Specific structures are disclosed for the inner and outer mounting arrangements. A specific tie-rod structure is also disclosed for elastically joining the individual nozzle segments. Also disclosed is a method of assembling the nozzle ring subassembly-by-subassembly into a gas turbine employing temporary jacks.

Klompas, Nicholas (Scotia, NY)

1985-01-01T23:59:59.000Z

110

Segmenting Simply Connected Moving Objects in a Static Scene  

E-Print Network (OSTI)

A new segmentation algorithm is derived, based on an object-background probability estimate exploiting the experimental fact that the statistics of local image derivatives show a Laplacian distribution. The objects' simply connectedness is included directly into the probability estimate and leads to an iterative optimization approach that can be implemented efficiently. This new approach avoids early thresholding, explicit edge detection, motion analysis, and grouping. Contribution type: Correspondence 1 This work was supported by the consortium VISAGE and KWF grant No. 2440.1 1 Introduction In many object recognition applications the objects of interest are moving whereas the background is static or can be stabilized [1, 2]. Motion segmentation can enormously simplify, subsequent object recognition steps. Therefore, detecting and segmenting moving objects in a static scene is an important computer vision task. In recent years a number of different approaches have been proposed for...

Martin Bichsel

1994-01-01T23:59:59.000Z

111

Documented Safety Analysis for the B695 Segment  

SciTech Connect

This Documented Safety Analysis (DSA) was prepared for the Lawrence Livermore National Laboratory (LLNL) Building 695 (B695) Segment of the Decontamination and Waste Treatment Facility (DWTF). The report provides comprehensive information on design and operations, including safety programs and safety structures, systems and components to address the potential process-related hazards, natural phenomena, and external hazards that can affect the public, facility workers, and the environment. Consideration is given to all modes of operation, including the potential for both equipment failure and human error. The facilities known collectively as the DWTF are used by LLNL's Radioactive and Hazardous Waste Management (RHWM) Division to store and treat regulated wastes generated at LLNL. RHWM generally processes low-level radioactive waste with no, or extremely low, concentrations of transuranics (e.g., much less than 100 nCi/g). Wastes processed often contain only depleted uranium and beta- and gamma-emitting nuclides, e.g., {sup 90}Sr, {sup 137}Cs, or {sup 3}H. The mission of the B695 Segment centers on container storage, lab-packing, repacking, overpacking, bulking, sampling, waste transfer, and waste treatment. The B695 Segment is used for storage of radioactive waste (including transuranic and low-level), hazardous, nonhazardous, mixed, and other waste. Storage of hazardous and mixed waste in B695 Segment facilities is in compliance with the Resource Conservation and Recovery Act (RCRA). LLNL is operated by the Lawrence Livermore National Security, LLC, for the Department of Energy (DOE). The B695 Segment is operated by the RHWM Division of LLNL. Many operations in the B695 Segment are performed under a Resource Conservation and Recovery Act (RCRA) operation plan, similar to commercial treatment operations with best demonstrated available technologies. The buildings of the B695 Segment were designed and built considering such operations, using proven building systems, and keeping them as simple as possible while complying with industry standards and institutional requirements. No operations to be performed in the B695 Segment or building system are considered to be complex. No anticipated future change in the facility mission is expected to impact the extent of safety analysis documented in this DSA.

Laycak, D

2008-09-11T23:59:59.000Z

112

B-spline active rays segmentation of microcalcifications in mammography  

Science Conference Proceedings (OSTI)

Accurate segmentation of microcalcifications in mammography is crucial for the quantification of morphologic properties by features incorporated in computer-aided diagnosis schemes. A novel segmentation method is proposed implementing active rays (polar-transformed active contours) on B-spline wavelet representation to identify microcalcification contour point estimates in a coarse-to-fine strategy at two levels of analysis. An iterative region growing method is used to delineate the final microcalcification contour curve, with pixel aggregation constrained by the microcalcification contour point estimates. A radial gradient-based method was also implemented for comparative purposes. The methods were tested on a dataset consisting of 149 mainly pleomorphic microcalcification clusters originating from 130 mammograms of the DDSM database. Segmentation accuracy of both methods was evaluated by three radiologists, based on a five-point rating scale. The radiologists' average accuracy ratings were 3.96{+-}0.77, 3.97{+-}0.80, and 3.83{+-}0.89 for the proposed method, and 2.91{+-}0.86, 2.10{+-}0.94, and 2.56{+-}0.76 for the radial gradient-based method, respectively, while the differences in accuracy ratings between the two segmentation methods were statistically significant (Wilcoxon signed-ranks test, p<0.05). The effect of the two segmentation methods in the classification of benign from malignant microcalcification clusters was also investigated. A least square minimum distance classifier was employed based on cluster features reflecting three morphological properties of individual microcalcifications (area, length, and relative contrast). Classification performance was evaluated by means of the area under ROC curve (A{sub z}). The area and length morphologic features demonstrated a statistically significant (Mann-Whitney U-test, p<0.05) higher patient-based classification performance when extracted from microcalcifications segmented by the proposed method (0.82{+-}0.06 and 0.86{+-}0.05, respectively), as compared to segmentation by the radial gradient-based method (0.71{+-}0.08 and 0.75{+-}0.08). The proposed method demonstrates improved segmentation accuracy, fulfilling human visual criteria, and enhances the ability of morphologic features to characterize microcalcification clusters.

Arikidis, Nikolaos S.; Skiadopoulos, Spyros; Karahaliou, Anna; Likaki, Eleni; Panayiotakis, George; Costaridou, Lena [Department of Medical Physics, School of Medicine, University of Patras, 265 00 Patras (Greece); Department of Radiology, School of Medicine, University of Patras, 265 00 Patras (Greece); Department of Medical Physics, School of Medicine, University of Patras, 265 00 Patras (Greece)

2008-11-15T23:59:59.000Z

113

Variable operation of Hall thruster with multiple segmented electrodes  

DOE Green Energy (OSTI)

Variable plasma jet velocity with low beam divergence over a range of mass flow rates can be achieved through segmented electrode operation of Hall plasma accelerator. With the use of just a cathode side electrode at the cathode potential, the beam divergence can be decreased substantially, at some cost in efficiency. However, the additional use of an anode side electrode retains the same reduced plume divergence, but at efficiencies comparable to the non-segmented operation. The high efficiency persists also when the anode side electrode is biased at an intermediate potential, thus producing two-stage Hall accelerator operation.

Fisch, N.J.; Raitses, Y.; Dorf, L.A.; Litvak, A.A.

2000-02-07T23:59:59.000Z

114

Study of segmented absorbers of thermal solar compound parabolic collectors  

SciTech Connect

One of the most promising means of improving the performance of solar thermal collectors is by reducing the energy lost by the host absorber. One way to do this, not currently part of the technology, is by recognizing that the absorber is usually not irradiated uniformly. Therefore, it is possible to construct an absorber of thermally isolated segments, circulate the fluid in sequence from low to high irradiance segments, and reduce loss by improving effective concentration. This procedure works even for ideal concentrators, without violating Winston's theorem.

Keita, M.

1988-01-01T23:59:59.000Z

115

Population and Environment  

E-Print Network (OSTI)

. . . . . . . . . . . . . . . . . . . . . 356 Coastal and Marine Environments . . . . . . . . . . . . . . . . . 358 Energy, Air Pollution or growth. Indeed, an overlay of graphs depicting global trends in population, energy consumption, carbon; coastal and marine environments; and energy, air pollu- tion, and climate change. In the concluding

116

Using temporal cues for segmenting texts into events  

Science Conference Proceedings (OSTI)

One of the early application of Information Extraction, motivated by the needs for intelligence tools, is the detection of events in news articles. But this detection may be difficult when news articles mention several occurrences of events of the same ... Keywords: information extraction, temporal cues, text segmentation

Ludovic Jean-Louis; Romaric Besançon; Olivier Ferret

2010-08-01T23:59:59.000Z

117

Service Provider Competition: Delay Cost Structure, Segmentation, and Cost Advantage  

Science Conference Proceedings (OSTI)

We model competition between two providers who serve delay-sensitive customers. We compare a generalized delay cost structure, where a customer's delay cost depends on her service valuation, with the traditional additive delay cost structure, where the ... Keywords: delay cost structure, service competition, value-based market segmentation

Maxim Afanasyev; Haim Mendelson

2010-04-01T23:59:59.000Z

118

Generating analyses for detecting faults in path segments  

Science Conference Proceedings (OSTI)

Although static bug detectors are extensively applied, there is a cost in using them. One challenge is that static analysis often reports a large number of false positives but little diagnostic information. Also, individual bug detectors need to be built ... Keywords: demand-driven, generate analysis, path segment, specification

Wei Le; Mary Lou Soffa

2011-07-01T23:59:59.000Z

119

Scene segmentation by cluster detection in color spaces  

Science Conference Proceedings (OSTI)

Ohlander [1] has shown that a variety of scenes can be segmented into meaningful parts by histogramming the values of various point or local properties of the scene; extracting the region whose points gave rise to that peak; and repeating the process ...

B. J. Schacter; L. S. Davis; A. Rosenfeld

1976-06-01T23:59:59.000Z

120

Suppressed fuzzy-soft learning vector quantization for MRI segmentation  

Science Conference Proceedings (OSTI)

Objective: A self-organizing map (SOM) is a competitive artificial neural network with unsupervised learning. To increase the SOM learning effect, a fuzzy-soft learning vector quantization (FSLVQ) algorithm has been proposed in the literature, using ... Keywords: CPU time, Learning vector quantization, Magnetic resonance image segmentation, Mean squared error, Self-organizing map

Wen-Liang Hung; De-Hua Chen; Miin-Shen Yang

2011-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Prostate cancer grading: Gland segmentation and structural features  

Science Conference Proceedings (OSTI)

In this paper, we introduce a novel approach to grade prostate malignancy using digitized histopathological specimens of the prostate tissue. Most of the approaches proposed in the literature to address this problem utilize various textural features ... Keywords: Benign, Carcinoma, Gland segmentation, Gleason grading system, Nuclei, Prostate cancer

Kien Nguyen; Bikash Sabata; Anil K. Jain

2012-05-01T23:59:59.000Z

122

Modified Segmental Histogram Equalization for robust speaker verification  

Science Conference Proceedings (OSTI)

It is well known that when there is an acoustic mismatch between the speech obtained during training and testing the accuracy of speaker recognition systems drastically deteriorates. In this paper we propose Modified Segmental Histogram Equalization ... Keywords: Histogram Equalization, Mismatched conditions, NIST 2000, Speaker verification

Marshalleno Skosan; Daniel Mashao

2006-04-01T23:59:59.000Z

123

A novel algorithm for segmenting fruit from unorganized point clouds  

Science Conference Proceedings (OSTI)

This paper proposes an efficient and robust four-step process to extracting fruit shape from background. At first, point clouds is divided into octree cells by an adaptive subdivision; Second, converting teach octree cell into a splat and approximating ... Keywords: MLS, PCA, covariance analysis, point cloud, segmentation, splat

Hui-jun Yang; Dong-jian He; Zhi-yi Zhang; Xin Wang

2011-12-01T23:59:59.000Z

124

Text segmentation based on document understanding for information retrieval  

E-Print Network (OSTI)

Text segmentation based on document understanding for information retrieval Violaine Prince,alexandre.labadie}@lirmm.fr Abstract. Information retrieval needs to match relevant texts with a given query. Selecting appropriate retrieval task is shown. 1 Introduction Information retrieval needs to match relevant texts with a given

Paris-Sud XI, Université de

125

Effective Tag Set Selection in Chinese Word Segmentation  

E-Print Network (OSTI)

Effective Tag Set Selection in Chinese Word Segmentation via Conditional Random Field Modeling Hai that we consider both feature template selection and tag set selection, instead of feature template as different tag sets are selected. Based on the proposed method, our system gives the state

126

Robust inside-outside segmentation using generalized winding numbers  

Science Conference Proceedings (OSTI)

Solid shapes in computer graphics are often represented with boundary descriptions, e.g. triangle meshes, but animation, physically-based simulation, and geometry processing are more realistic and accurate when explicit volume representations are available. ... Keywords: inside-outside segmentation, tetrahedral meshing, winding number

Alec Jacobson; Ladislav Kavan; Olga Sorkine-Hornung

2013-07-01T23:59:59.000Z

127

Method of making segmented pyrolytic graphite sputtering targets  

DOE Patents (OSTI)

Anisotropic pyrolytic graphite wafers are oriented and bonded together such that the graphite's high thermal conductivity planes are maximized along the back surface of the segmented pyrolytic graphite target to allow for optimum heat conduction away from the sputter target's sputtering surface and to allow for maximum energy transmission from the target's sputtering surface.

McKernan, Mark A. (Livermore, CA); Alford, Craig S. (Tracy, CA); Makowiecki, Daniel M. (Livermore, CA); Chen, Chih-Wen (Livermore, CA)

1994-01-01T23:59:59.000Z

128

Selectivity Estimation of Window Queries for Line Segment Datasets  

E-Print Network (OSTI)

Intl. Conf. on Information and Knowledge Management, pages 490--499, Washington, DC, 1993. [11] J 214--221, Washington, DC, 1993. [13] G. Proietti and C. Faloutsos. Accurate modeling of region dataSelectivity Estimation of Window Queries for Line Segment Datasets Guido Proietti 1 Christos

129

Selectivity Estimation of Window Queries for Line Segment Datasets  

E-Print Network (OSTI)

{499, Washington, DC, 1993. 11] J. Orenstein. Spatial query processing in an object- oriented database system- ples of Database Systems,pages 214{221, Washington, DC, 1993. 13] G. Proietti and C. FaloutsosSelectivity Estimation of Window Queries for Line Segment Datasets Guido Proietti Dept. of Computer

Faloutsos, Christos

130

Segmenting sensor data for activity monitoring in smart environments  

Science Conference Proceedings (OSTI)

Within a smart environment, sensors have the ability to perceive changes of the environment itself and can therefore be used to infer high-level information such as activity behaviours. Sensor events collected over a period of time may contain several ... Keywords: Activity detection, Evidential modelling, Smart environments, Time series sensor segmentation

Xin Hong; Chris D. Nugent

2013-03-01T23:59:59.000Z

131

Multiband segmentation based on a hierarchical Markov model  

Science Conference Proceedings (OSTI)

We develop a new multiscale Markov segmentation model for multiband images. Using quadtree multiple resolution analysis of a multiband image, we use both inter- and intra-scale spatial Markov statistical dependencies. Bayesian inference is used to assess ... Keywords: Bayes factor, Bayes information criterion, Bayesian inference, Generalized Gaussian distribution, Markov random field, Multiband image, Multiresolution, Multiscale, Multispectral image, Quadtree

Christophe Collet; Fionn Murtagh

2004-12-01T23:59:59.000Z

132

Design of statistical measures for the assessment of image segmentation schemes  

Science Conference Proceedings (OSTI)

Image segmentation is discussed for years in numerous papers, but assessing its quality is mainly dealt with in recent works. Quality assessment is a primary concern for anyone working towards better segmentation tools. It both helps to objectively improve ...

Marc Van Droogenbroeck; Olivier Barnich

2005-09-01T23:59:59.000Z

133

A PROBABILISTIC SEGMENTATION METHOD FOR IVUS Gerardo Mendizabal-Ruiz, Mariano Rivera and Ioannis A.  

E-Print Network (OSTI)

A PROBABILISTIC SEGMENTATION METHOD FOR IVUS IMAGES Gerardo Mendizabal-Ruiz, Mariano Rivera segmentation method for IVUS images Gerardo Mendizabal-Ruiz CIMAT egerardo@cimat.mx Mariano Rivera CIMAT

Rivera, Mariano

134

Binary Segmentation of Video Sequences in Real Time Francisco J. HernandezLopez and Mariano Rivera  

E-Print Network (OSTI)

Binary Segmentation of Video Sequences in Real Time Francisco J. Hernandez­Lopez and Mariano Rivera [8, 9]. Francisco Hernandez-Lopez and Mariano Rivera, Binary Segmentation of Video Sequences in Real

Rivera, Mariano

135

PEO-containing copolymers as polyurethane soft segments in the development of high performance materials  

E-Print Network (OSTI)

Silk-inspired segmented polyurethanes containing flexible, hydrophilic segments with crystalline and liquid crystalline moieties were developed to mimic the hierarchical morphology of the continuous domain in and the ...

James-Korley, LaShanda Teresa

2005-01-01T23:59:59.000Z

136

Statistical Characterization and Segmentation of Drusen in Fundus Images  

SciTech Connect

Age related Macular Degeneration (AMD) is a disease of the retina associated with aging. AMD progression in patients is characterized by drusen, pigmentation changes, and geographic atrophy, which can be seen using fundus imagery. The level of AMD is characterized by standard scaling methods, which can be somewhat subjective in practice. In this work we propose a statistical image processing approach to segment drusen with the ultimate goal of characterizing the AMD progression in a data set of longitudinal images. The method characterizes retinal structures with a statistical model of the colors in the retina image. When comparing the segmentation results of the method between longitudinal images with known AMD progression and those without, the method detects progression in our longitudinal data set with an area under the receiver operating characteristics curve of 0.99.

Santos-Villalobos, Hector J [ORNL; Karnowski, Thomas Paul [ORNL; Aykac, Deniz [ORNL; Giancardo, Luca [ORNL; Li, Yaquin [University of Tennessee, Knoxville (UTK); Nichols, Trent L [ORNL; Tobin Jr, Kenneth William [ORNL; Chaum, Edward [University of Tennessee, Knoxville (UTK)

2011-01-01T23:59:59.000Z

137

Measurements of Plasma Potential Distribution in Segmented Electrode Hall Thruster  

DOE Green Energy (OSTI)

Use of a segmented electrode placed at the Hall thruster exit can substantially reduce the voltage potential drop in the fringing magnetic field outside the thruster channel. In this paper, we investigate the dependence of this effect on thruster operating conditions and segmented electrode configuration. A fast movable emissive probe is used to measure plasma potential in a 1 kW laboratory Hall thruster with semented electrodes made of a graphite material. Relatively small probe-induced perturbations of the thruster discharge in the vicinity of the thruster exit allow a reasonable comparison of the measured results for different thruster configurations. It is shown that the plasma potential distribution is almost not sensitive to changes of the electrode potential, but depends on the magnetic field distribution and the electrode placement.

Y. Raitses; D. Staack; N.J. Fisch

2001-10-16T23:59:59.000Z

138

Segmented saddle-shaped passive stabilization conductors for toroidal plasmas  

DOE Patents (OSTI)

A large toroidal vacuum chamber for plasma generation and confinement is lined with a toroidal blanket for shielding using modules segmented in the toroidal direction. To provide passive stabilization in the same manner as a conductive vacuum chamber wall, saddle-shaped conductor loops are provided on blanket modules centered on a midplane of the toroidal chamber with horizontal conductive bars above and below the midplane, and vertical conductive legs on opposite sides of each module to provide return current paths between the upper and lower horizontal conductive bars. The close proximity of the vertical legs provided on adjacent modules without making physical contact cancel the electromagnetic field of adjacent vertical legs. The conductive bars spaced equally above and below the midplane simulate toroidal conductive loops or hoops that are continuous, for vertical stabilization of the plasma even though they are actually segmented.

Leuer, James A. (Encinitas, CA)

1990-05-01T23:59:59.000Z

139

B-Spline Active Contours for Fast Video Segmentation  

E-Print Network (OSTI)

Video segmentation is among the most important challenges of video processing and compression (MPEG-4 and MPEG-7). A drawback of classical methods is the computational cost due to the model complexity. In this paper we propose to use a B-Spline parametric contour to implement a region-based active contour segmentation. Hence we get a fast variational method based on active contours with an intrinsic regularizing constraint. More precisely the evolution force follows from the minimization of a region-based criterion. The theory of B-Splines allows analytical computation of the contour curvature at any point. The model complexity is fixed and depends on the desired level of detail. This complexity is highly compared to non parametric methods. We compare our new approach to classical parametric polygon-based methods. We show experiments on real video sequences.

F. Precioso; M. Barlaud

2001-01-01T23:59:59.000Z

140

Segmented saddle-shaped passive stabilization conductors for toroidal plasmas  

DOE Patents (OSTI)

A large toroidal vacuum chamber for plasma generation and confinement is lined with a toroidal blanket for shielding using modules segmented in the toroidal direction. To provide passive stabilization in the same manner as a conductive vacuum chamber wall, saddle-shaped conductor loops are provided on blanket modules centered on a midplane of the toroidal chamber with horizontal conductive bars above and below the midplane, and vertical conductive legs on opposite sides of each module to provide return current paths between the upper and lower horizontal conductive bars. The close proximity of the vertical legs provided on adjacent modules without making physical contact cancel the electromagnetic field of adjacent vertical legs. The conductive bars spaced equally above and below the midplane simulate toroidal conductive loops or hoops that are continuous, for vertical stabilization of the plasma even though they are actually segmented. 5 figs.

Leuer, J.A.

1990-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

A Geometric Approach For Fully Automatic Chromosome Segmentation  

E-Print Network (OSTI)

Chromosome segmentation is a fundamental task in human chromosome analysis. Most of previous methods for separation between touching chromosomes require human intervention. In this paper, a geometry based method is used for automatic chromosome segmentation. This method can be divided into two phases. In the first phase, chromosome clusters are detected using three geometric criteria and in the second phase chromosome clusters are separated using a proper cut line. However, most earlier methods do not work well with chromosome clusters that contain more than two chromosomes. Our method, on the other hand, has a high efficiency in separation of chromosome clusters in such scenarios. Another advantage of the proposed method is that it can easily apply to any type of images such as binary images. This is due to the fact that the proposed scheme uses the geometric features of chromosomes which are independent of the type of images. The performance of the proposed scheme is demonstrated on a database containing to...

Minaee, Shervin; Khalaj, Babak Hossein

2011-01-01T23:59:59.000Z

142

Neutron Interactions as Seen by A Segmented Germanium Detector  

E-Print Network (OSTI)

The GERmanium Detector Array, GERDA, is designed for the search for ``neutrinoless double beta decay'' (0-nu-2-beta) with germanium detectors enriched in Ge76. An 18-fold segmented prototype detector for GERDA Phase II was exposed to an AmBe neutron source to improve the understanding of neutron induced backgrounds. Neutron interactions with the germanium isotopes themselves and in the surrounding materials were studied. Segment information is used to identify neutron induced peaks in the recorded energy spectra. The Geant4 based simulation package MaGe is used to simulate the experiment. Though many photon peaks from germanium isotopes excited by neutrons are correctly described by Geant4, some physics processes were identified as being incorrectly treated or even missing.

I. Abt; A. Caldwell; K. Kroeninger; J. Liu; X. Liu; B. Majorovits

2007-11-14T23:59:59.000Z

143

Unsupervised Learning of Probabilistic Object Models (POMs) for Object Classification, Segmentation and Recognition using Knowledge Propagation  

E-Print Network (OSTI)

segmentation. In: ECCV (2). 4. Fukushima, K. : Neocognitron:design dates back to Fukushima’s Neocognitron [4]. Recently,

Chen, Yuanhao; Zhu, Long Leo; Yuille, Alan; Zhang, Hongjiang

2009-01-01T23:59:59.000Z

144

GPU-based relative fuzzy connectedness image segmentation  

SciTech Connect

Purpose:Recently, clinical radiological research and practice are becoming increasingly quantitative. Further, images continue to increase in size and volume. For quantitative radiology to become practical, it is crucial that image segmentation algorithms and their implementations are rapid and yield practical run time on very large data sets. The purpose of this paper is to present a parallel version of an algorithm that belongs to the family of fuzzy connectedness (FC) algorithms, to achieve an interactive speed for segmenting large medical image data sets. Methods: The most common FC segmentations, optimizing an Script-Small-L {sub {infinity}}-based energy, are known as relative fuzzy connectedness (RFC) and iterative relative fuzzy connectedness (IRFC). Both RFC and IRFC objects (of which IRFC contains RFC) can be found via linear time algorithms, linear with respect to the image size. The new algorithm, P-ORFC (for parallel optimal RFC), which is implemented by using NVIDIA's Compute Unified Device Architecture (CUDA) platform, considerably improves the computational speed of the above mentioned CPU based IRFC algorithm. Results: Experiments based on four data sets of small, medium, large, and super data size, achieved speedup factors of 32.8 Multiplication-Sign , 22.9 Multiplication-Sign , 20.9 Multiplication-Sign , and 17.5 Multiplication-Sign , correspondingly, on the NVIDIA Tesla C1060 platform. Although the output of P-ORFC need not precisely match that of IRFC output, it is very close to it and, as the authors prove, always lies between the RFC and IRFC objects. Conclusions: A parallel version of a top-of-the-line algorithm in the family of FC has been developed on the NVIDIA GPUs. An interactive speed of segmentation has been achieved, even for the largest medical image data set. Such GPU implementations may play a crucial role in automatic anatomy recognition in clinical radiology.

Zhuge Ying; Ciesielski, Krzysztof C.; Udupa, Jayaram K.; Miller, Robert W. [Radiation Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892 (United States); Department of Mathematics, West Virginia University, Morgantown, West Virginia 26506 (United States) and Medical Image Processing Group, Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States); Medical Image Processing Group, Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States); Radiation Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892 (United States)

2013-01-15T23:59:59.000Z

145

Dual-circuit segmented rail phased induction motor  

DOE Patents (OSTI)

An improved linear motor utilizes two circuits, rather that one circuit and an opposed plate, to gain efficiency. The powered circuit is a flat conductive coil. The opposed segmented rail circuit is either a plurality of similar conductive coils that are shorted, or a plurality of ladders formed of opposed conductive bars connected by a plurality of spaced conductors. In each embodiment, the conductors are preferably cables formed from a plurality of intertwined insulated wires to carry current evenly.

Marder, Barry M. (Albuquerque, NM); Cowan, Jr., Maynard (Albuquerque, NM)

2002-01-01T23:59:59.000Z

146

Combining Belief Networks and Neural Networks for Scene Segmentation  

Science Conference Proceedings (OSTI)

We are concerned with the problem of image segmentation, in which each pixel is assigned to one of a predefined finite number of labels. In Bayesian image analysis, this requires fusing together local predictions for the class labels with a prior model ... Keywords: tree-structured belief network (TSBN), hierarchical modeling, Markov random field (MRF), neural network, scaled-likelihood method, conditional maximum-likelihood training, Gaussian mixture model, expectation-maximization (EM)

X. Feng; C. K. I. Williams; S. N. Felderhof

2002-04-01T23:59:59.000Z

147

Method of making segmented pyrolytic graphite sputtering targets  

DOE Patents (OSTI)

Anisotropic pyrolytic graphite wafers are oriented and bonded together such that the graphite's high thermal conductivity planes are maximized along the back surface of the segmented pyrolytic graphite target to allow for optimum heat conduction away from the sputter target's sputtering surface and to allow for maximum energy transmission from the target's sputtering surface. 2 figures.

McKernan, M.A.; Alford, C.S.; Makowiecki, D.M.; Chen, C.W.

1994-02-08T23:59:59.000Z

148

Assessment of Grid Reliability Benefits and Transfer Gains with Segmentation  

Science Conference Proceedings (OSTI)

Developments in the electric power industry have accentuated the need to resolve problems caused by certain limitations inherent to ac transmission, including inadvertent (parallel and loop) flows, stability and voltage constraints limiting total transfer capability (TTC), the propagation of disturbances capable of producing system separations and cascading outages, limited power densities on rights-of-way, and difficulties in achieving coordinated transmission planning. Segmenting a grid by breaking it ...

2009-12-20T23:59:59.000Z

149

Automatic segmentation of histological structures in mammary gland tissue sections  

SciTech Connect

Real-time three-dimensional (3D) reconstruction of epithelial structures in human mammary gland tissue blocks mapped with selected markers would be an extremely helpful tool for breast cancer diagnosis and treatment planning. Besides its clear clinical application, this tool could also shed a great deal of light on the molecular basis of breast cancer initiation and progression. In this paper we present a framework for real-time segmentation of epithelial structures in two-dimensional (2D) images of sections of normal and neoplastic mammary gland tissue blocks. Complete 3D rendering of the tissue can then be done by surface rendering of the structures detected in consecutive sections of the blocks. Paraffin embedded or frozen tissue blocks are first sliced, and sections are stained with Hematoxylin and Eosin. The sections are then imaged using conventional bright field microscopy and their background is corrected using a phantom image. We then use the Fast-Marching algorithm to roughly extract the contours of the different morphological structures in the images. The result is then refined with the Level-Set method which converges to an accurate (sub-pixel) solution for the segmentation problem. Finally, our system stacks together the 2D results obtained in order to reconstruct a 3D representation of the entire tissue block under study. Our method is illustrated with results from the segmentation of human and mouse mammary gland tissue samples.

Fernandez-Gonzalez, Rodrigo; Deschamps, Thomas; Idica, Adam K.; Malladi, Ravikanth; Ortiz de Solorzano, Carlos

2004-02-17T23:59:59.000Z

150

Segmentation of images with separating layers by fuzzy c-means and convex optimization  

Science Conference Proceedings (OSTI)

This paper is concerned with the segmentation of two- and three-dimensional images containing separated layers. We tackle this problem by combining the fuzzy c-means algorithm with recently developed convex multi-class segmentation algorithms, where ... Keywords: ADMM, Convex optimization, Fuzzy-c means, Materials with layers, Segmentation, TV-functional

B. Shafei; G. Steidl

2012-05-01T23:59:59.000Z

151

Mixing of miscible liquids in gas-segmented serpentine channels Hakan Dogan a  

E-Print Network (OSTI)

Mixing of miscible liquids in gas-segmented serpentine channels Hakan Dogan a , Selman Nas b July 2009 Accepted 16 July 2009 Available online 22 July 2009 Keywords: Segmented gas-liquid flow of miscible liquids in gas-segmented serpentine channels is studied computationally in a two

Muradoglu, Metin

152

Axial dispersion in segmented gas-liquid flow: Effects of alternating channel curvature  

E-Print Network (OSTI)

Axial dispersion in segmented gas-liquid flow: Effects of alternating channel curvature Metin of channel curvature on the axial dispersion in segmented gas-liquid flows are studied computationally.1063/1.3531742 I. INTRODUCTION Segmented gas-liquid flow also known as Taylor flow has been studied extensively

Muradoglu, Metin

153

Remote sensing image segmentation by active queries Devis Tuia a,n  

E-Print Network (OSTI)

Remote sensing image segmentation by active queries Devis Tuia a,n , Jordi Mun~oz-Mari´ b , Gustavo Multiscale image segmentation Remote sensing Hyperspectral imagery Multispectral imagery a b s t r a c- istics in a compact way. For remote sensing image segmentation, the selected samples are the most

Camps-Valls, Gustavo

154

Medical image segmentation using cooccurrence matrix based texture features calculated on weighted region  

Science Conference Proceedings (OSTI)

An improvement of texture based 2D or 3D image segmentation method is proposed, aimed at medical image analysis. Segmentation of organs or disease diagnosing is the targetted problem. Features based on cooccurrence matrix are studied. A new approach ... Keywords: 3D image analysis, Haralick features, bioinformatics, cooccurrence matrix, image segmentation, medical image analysis, texture features

Ludvik Tesar; Daniel Smutek; Akinobu Shimizu; Hidefume Kobatake

2007-04-01T23:59:59.000Z

155

Abstract --Image segmentation plays an important role in medical image processing. The aim of conventional hard  

E-Print Network (OSTI)

of conventional hard segmentation methods is to assign a unique label to each voxel. However, due to the limited (PV) effect. Using the hard segmentation methods, the PV effect can substantially decrease evaluation. Results demonstrated that a hard segmentation method would loss a significant amount of details

156

An adaptive approach for online segmentation of multi-dimensional mobile data  

Science Conference Proceedings (OSTI)

With increasing availability of mobile sensing devices including smartphones, online mobile data segmentation becomes an important topic in reconstructing and understanding mobile data. Traditional approaches like online time series segmentation either ... Keywords: adaptive model creation, feature selection, mobile data mining, online segmentation

Tian Guo; Zhixian Yan; Karl Aberer

2012-05-01T23:59:59.000Z

157

Simultaneous Segmentation and Pose Estimation of Humans Using Dynamic Graph Cuts  

Science Conference Proceedings (OSTI)

This paper presents a novel algorithm for performing integrated segmentation and 3D pose estimation of a human body from multiple views. Unlike other state of the art methods which focus on either segmentation or ... Keywords: Energy minimization, Pose estimation, Segmentation

Pushmeet Kohli; Jonathan Rihan; Matthieu Bray; Philip H. Torr

2008-09-01T23:59:59.000Z

158

Automatic segmentation of the left ventricle cavity and myocardium in MRI data  

Science Conference Proceedings (OSTI)

A novel approach for the automatic segmentation has been developed to extract the epi-cardium and endo-cardium boundaries of the left ventricle (lv) of the heart. The developed segmentation scheme takes multi-slice and multi-phase magnetic resonance ... Keywords: Clustering, Left ventricle, Level-set, MRI, Myocardium, Segmentation

M. Lynch; O. Ghita; P. F. Whelan

2006-04-01T23:59:59.000Z

159

Functional Segmentation of Renal DCE-MRI Sequences Using Vector Quantization Algorithms  

Science Conference Proceedings (OSTI)

In dynamic contrast-enhanced magnetic resonance imaging, segmentation of internal kidney structures like cortex, medulla and cavities is essential for functional assessment. To avoid fastidious and time-consuming manual segmentation, semi-automatic methods ... Keywords: Biomedical image processing, Biomedical magnetic resonance imaging, Clustering methods, Image segmentation, Image sequence analysis, Vector quantization

Béatrice Chevaillier; Damien Mandry; Jean-Luc Collette; Michel Claudon; Marie-Agnès Galloy; Olivier Pietquin

2011-08-01T23:59:59.000Z

160

Segmentation of female pelvic organs in axial magnetic resonance images using coupled geometric deformable models  

Science Conference Proceedings (OSTI)

The segmentation of pelvic structures in magnetic resonance (MR) images of the female pelvic cavity is a challenging task. This paper proposes the use of three novel geometric deformable models to segment the bladder, vagina and rectum in axial MR images. ... Keywords: Bladder, Image segmentation, Imaging appearance, Level set, Prior shape knowledge, Rectum, Vagina

Zhen Ma; Renato M. Natal Jorge; Teresa Mascarenhas; JoãO Manuel R. S. Tavares

2013-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

The Researches of Microscopic Image Segmentation and Recognition on the Cancer Cells Fallen into Peritoneal Effusion  

Science Conference Proceedings (OSTI)

Abstract: Auto-segmentation of cell is one of the most interesting segmentation problems due to the complex nature of the cell tissues and to the inherent problems of video microscopic image. Objects, which are variant, narrow range of gray levels, non-random ... Keywords: Artificial neural network, computer-aided diagnosis, cell image segmentation, cell image recognition, peritoneal effusion

Hongyuan Wang; Shenggen Zeng; Chengang Yu; Xiaogang Wang; Deshen Xia

2001-06-01T23:59:59.000Z

162

Segment-Based Map Building Using Enhanced Adaptive Fuzzy Clustering Algorithm for Mobile Robot Applications  

Science Conference Proceedings (OSTI)

In this paper, we present a technique for on-line segment-based map building in an unknown indoor environment from sonar sensor observations. The world model is represented with two-dimensional line segments. The information obtained by the ultrasonic ... Keywords: fuzzy clustering, mobile robots, noise clustering, segment-based map building

Y. L. Ip; A. B. Rad; K. M. Chow; Y. K. Wong

2002-11-01T23:59:59.000Z

163

Character segmentation and retrieval for learning support system of Japanese historical books  

Science Conference Proceedings (OSTI)

This paper proposes a character segmentation and retrieval method for a learning support system that analyzes digitized Japanese historical woodblock printed books. The proposed system detects text lines, segments characters, and retrieves similar characters ... Keywords: Japanese historical book, character retrieval, character segmentation, learning support system, woodblock printed book

Chulapong Panichkriangkrai, Liang Li, Kozaburo Hachimura

2013-08-01T23:59:59.000Z

164

A survey of prostate segmentation methodologies in ultrasound, magnetic resonance and computed tomography images  

Science Conference Proceedings (OSTI)

Prostate segmentation is a challenging task, and the challenges significantly differ from one imaging modality to another. Low contrast, speckle, micro-calcifications and imaging artifacts like shadow poses serious challenges to accurate prostate segmentation ... Keywords: CT images, MR images, Prostate gland segmentation methods, TRUS images

Soumya Ghose; Arnau Oliver; Robert Martí; Xavier Lladó; Joan C. Vilanova; Jordi Freixenet; Jhimli Mitra; DéSiré Sidibé; Fabrice Meriaudeau

2012-10-01T23:59:59.000Z

165

Signal segmentation using changing regression models with application in seismic engineering  

Science Conference Proceedings (OSTI)

The change detection and segmentation methods have gained considerable attention in scientific research and appear to be the central issue in various application areas. The objective of the paper is to present a segmentation method, based on maximum ... Keywords: Change detection, Data segmentation, MAP estimator, Monte Carlo simulation, Seismic signal processing

Theodor D. Popescu

2014-01-01T23:59:59.000Z

166

HEART SEGMENTATION WITH AN ITERATIVE CHAN-VESE OLIVIER ROUSSEAU, YVES BOURGAULT  

E-Print Network (OSTI)

HEART SEGMENTATION WITH AN ITERATIVE CHAN-VESE ALGORITHM OLIVIER ROUSSEAU, YVES BOURGAULT Abstract. This paper presents 2D and 3D applications of the Chan-Vese model to heart and trachea segmentation. We is to segment the heart muscle from high resolution CT scans of the thorax and to produce meshes

Paris-Sud XI, Université de

167

Technological distinctive competencies and organizational learning: Effects on organizational innovation to improve firm performance  

Science Conference Proceedings (OSTI)

This paper analyzes how top management support of technology influences the generation of technological skills, technological distinctive competencies and organizational learning. The research also examines the effects of technological distinctive competencies ... Keywords: O32, O33, Organizational innovation, Organizational learning, Organizational performance, Q55, Technological distinctive competencies, Top management support

MaríA Teresa BolíVar-Ramos; VíCtor J. GarcíA-Morales; EncarnacióN GarcíA-SáNchez

2012-07-01T23:59:59.000Z

168

Part 5. Chapter 9 Segment-specific graphical modeling of the e-commerce market Segment-specific graphical modeling of the e-commerce market  

E-Print Network (OSTI)

of the structure and characteristics of specific segments that are not obvious in the visual inspection. Alternatively (Dawid, 1979), XiXj | Xk if the joint density ( ) (

Lisboa, Paulo

169

Distinct angiotensin II receptor in primary cultures of glial cells from rat brain  

SciTech Connect

Angiotensin II (Ang-II) has profound effects on the brain. Receptors for Ang-II have been demonstrated on neurons, but no relationship between glial cells and Agn-II has been established. Glial cells (from the hypothalamus and brain stem of 1-day-old rat brains) in primary culture have been used to demonstrate the presence of specific Ang-II receptors. Binding of /sup 125/I-Ang-II to glial cultures was rapid, reversible, saturable, and specific for Ang-II. The rank order of potency of /sup 125/I-Ang-II binding was determined. Scatchard analysis revealed a homogeneous population of high-affinity binding sites with a B/sub max/ of 110 fmol/mg of protein. Light-microscopic autoradiography of /sup 125/I-Ang-II binding supported the kinetic data, documenting specific Ang-II receptors on the glial cells. Ang-II stimulated a dose-dependent hydrolysis of phosphatidylinositols in glial cells, an effect mediated by Ang-II receptors. However, Ang-II failed to influence (/sup 3/H) norepinephrine uptake, and catecholamines failed to regulate Ang-II receptors, effects that occur in neurons. These observations demonstrate the presence of specific Ang-II receptors on the glial cells in primary cultures derived from normotensive rat brain. The receptors are kinetically similar to, but functionally distinct from, the neuronal Ang-II receptors.

Raizada, M.K.; Phillips, M.I.; Crews, F.T.; Sumners, C.

1987-07-01T23:59:59.000Z

170

Topology of Dupin hypersurfaces with six distinct principal curvatures  

E-Print Network (OSTI)

Let M be a Dupin hypersurface in the unit sphere S n+1 with six distinct principal curvatures. The main purpose of the present paper is to show M is either diffeomorphic to SU(2) \\Theta SU(2)=Q 8 or homeomorphic to the tube around an embedded 5dimensional complex Fermat hypersurface X 5 (2) in S 13 , where Q 8 ae SU(2) = Sp(1) denotes the subgroup f\\Sigma1; \\Sigmai; \\Sigmaj; \\Sigmakg and X 5 (2) = f[z 0 ; z 1 ; \\Delta \\Delta \\Delta z 6 ] 2 CP 6 jz 2 0 +z 2 1 + \\Delta \\Delta \\Delta + z 2 6 = 0g. Moreover, in the former case, all of the focal manifolds are diffeomorphic to S 3 \\Theta RP 2 ; In the latter case, one of the focal manifolds is homeomorphic to X 5 (2). 1 Introduction A closed n-dimensional submanifold in the unit sphere S n+1 is called a Dupin hypersurface if the multiplicities of the principal curvatures are constant and if each principal curvature function restricted to the leaves of the distribution T = fxjAx = xg is constant [16]. The most important sp...

Fuquan Fang

1995-01-01T23:59:59.000Z

171

Retina Lesion and Microaneurysm Segmentation using Morphological Reconstruction Methods with Ground-Truth Data  

SciTech Connect

In this work we report on a method for lesion segmentation based on the morphological reconstruction methods of Sbeh et. al. We adapt the method to include segmentation of dark lesions with a given vasculature segmentation. The segmentation is performed at a variety of scales determined using ground-truth data. Since the method tends to over-segment imagery, ground-truth data was used to create post-processing filters to separate nuisance blobs from true lesions. A sensitivity and specificity of 90% of classification of blobs into nuisance and actual lesion was achieved on two data sets of 86 images and 1296 images.

Karnowski, Thomas Paul [ORNL; Govindaswamy, Priya [Oak Ridge National Laboratory (ORNL); Tobin Jr, Kenneth William [ORNL; Chaum, Edward [University of Tennessee, Knoxville (UTK); Abramoff, M.D. [University of Iowa

2008-01-01T23:59:59.000Z

172

Retina Lesion and Microaneurysm Segmentation using Morphological Reconstruction Methods with Ground-Truth Data  

SciTech Connect

In this work we report on a method for lesion segmentation based on the morphological reconstruction methods of Sbeh et. al. We adapt the method to include segmentation of dark lesions with a given vasculature segmentation. The segmentation is performed at a variety of scales determined using ground-truth data. Since the method tends to over-segment imagery, ground-truth data was used to create post-processing filters to separate nuisance blobs from true lesions. A sensitivity and specificity of 90% of classification of blobs into nuisance and actual lesion was achieved on two data sets of 86 images and 1296 images.

Karnowski, Thomas Paul [ORNL; Tobin Jr, Kenneth William [ORNL; Chaum, Edward [ORNL; Muthusamy Govindasamy, Vijaya Priya [ORNL

2009-09-01T23:59:59.000Z

173

Population Monte Carlo algorithms  

E-Print Network (OSTI)

We give a cross-disciplinary survey on ``population'' Monte Carlo algorithms. In these algorithms, a set of ``walkers'' or ``particles'' is used as a representation of a high-dimensional vector. The computation is carried out by a random walk and split/deletion of these objects. The algorithms are developed in various fields in physics and statistical sciences and called by lots of different terms -- ``quantum Monte Carlo'', ``transfer-matrix Monte Carlo'', ``Monte Carlo filter (particle filter)'',``sequential Monte Carlo'' and ``PERM'' etc. Here we discuss them in a coherent framework. We also touch on related algorithms -- genetic algorithms and annealed importance sampling.

Yukito IBA

2000-08-16T23:59:59.000Z

174

The impacts of population change on carbon emissions in China during 1978-2008  

SciTech Connect

This study examines the impacts of population size, population structure, and consumption level on carbon emissions in China from 1978 to 2008. To this end, we expanded the stochastic impacts by regression on population, affluence, and technology model and used the ridge regression method, which overcomes the negative influences of multicollinearity among independent variables under acceptable bias. Results reveal that changes in consumption level and population structure were the major impact factors, not changes in population size. Consumption level and carbon emissions were highly correlated. In terms of population structure, urbanization, population age, and household size had distinct effects on carbon emissions. Urbanization increased carbon emissions, while the effect of age acted primarily through the expansion of the labor force and consequent overall economic growth. Shrinking household size increased residential consumption, resulting in higher carbon emissions. Households, rather than individuals, are a more reasonable explanation for the demographic impact on carbon emissions. Potential social policies for low carbon development are also discussed. - Highlights: Black-Right-Pointing-Pointer We examine the impacts of population change on carbon emissions in China. Black-Right-Pointing-Pointer We expand the STIRPAT model by containing population structure factors in the model. Black-Right-Pointing-Pointer The population structure includes age structure, urbanization level, and household size. Black-Right-Pointing-Pointer The ridge regression method is used to estimate the model with multicollinearity. Black-Right-Pointing-Pointer The population structure plays a more important role compared with the population size.

Zhu Qin, E-mail: zhuqin@fudan.edu.cn; Peng Xizhe, E-mail: xzpeng@fudan.edu.cn

2012-09-15T23:59:59.000Z

175

Segmented and self-adjusting wind turbine rotors. Final report  

DOE Green Energy (OSTI)

An investigation was carried out to examine the use of blade aeroelastic properties for providing rotational speed control for a wind turbine generator (WTG). The study was specifically directed at obtaining a rotor configuration that has the capability for maintaining nearly constant torque at constant RPM in the presence of varying wind conditions and is aimed at eliminating the current requirement for mechanical pitch change devices. The approach considered is one in which rotor twist due to aerodynamic loading is used to adjust the blade's pitch as the wind speed changes. The preliminary design concept that has evolved is a flexible rotor blade formed from a series of individual, light, rigid segments that are arranged along the blade spar. Each segment can rotate around the spar but is restricted in pitch by a nonlinear mechanical spring. The results of performance calculations as well as vibration and flutter analyses are presented. Based on these results, the concept appears to provide an attractive solution to the problem of WTG operation in a varying wind field.

Jordan, P.F.; Goldman, R.L.

1976-04-01T23:59:59.000Z

176

DOE Launches First Segment of its Next-Generation Nationwide Network to  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

First Segment of its Next-Generation Nationwide First Segment of its Next-Generation Nationwide Network to Support Scientific Research Efforts DOE Launches First Segment of its Next-Generation Nationwide Network to Support Scientific Research Efforts May 30, 2007 - 1:24pm Addthis WASHINGTON, DC- The U.S. Department of Energy's (DOE) Office of Science and Internet2 announced today that the first segment of a next-generation, nationwide network has gone live, marking a key step in significantly upgrading networking services to thousands of scientific researchers across the country and around the world. The first complete national ring of DOE's Energy Sciences Network (ESnet4) will be rolled out segment by segment from the east coast to the west coast and is expected to be fully operational by September, 2007.

177

Recent United States and International Experiences in Reactor Vessel and Internals Segmentation  

Science Conference Proceedings (OSTI)

The segmentation of reactor vessels and internals is one of the most challenging tasks in nuclear power plant decommissioning. Many experiences, lessons learned, and best practices have been gained through the execution of the first few reactor vessel and internals segmentation projects. The Electric Power Research Institute (EPRI) previously documented the experiences, lessons learned, best practices, and technologies used in decommissioning reactor vessel and internals segmentation projects in the Unit...

2011-11-29T23:59:59.000Z

178

2D object segmentation and matching using B-spline model.  

E-Print Network (OSTI)

??Including: 2 parts. This is part b. This thesis presents a research work on object segmentation and matching using a Bspline model. The B-spline is… (more)

Wang, Yue.

2008-01-01T23:59:59.000Z

179

2D object segmentation and matching using B-spline model.  

E-Print Network (OSTI)

??Including: 2 parts. This is part a. This thesis presents a research work on object segmentation and matching using a Bspline model. The B-spline is… (more)

Wang, Yue.

2008-01-01T23:59:59.000Z

180

Geographic information systems and spatial analysis of market segmentation for community banks.  

E-Print Network (OSTI)

??The purpose of this research was to determine the value of incorporating consumer behavioral datasets, specifically lifestyle market segmentation, into traditional site selection and location… (more)

Parrish, Jason S.

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Study of the Behaviour of LSCM Anode Composites in a Segmented ...  

Science Conference Proceedings (OSTI)

Symposium, Energy Conversion/Fuel Cells. Presentation Title, Study of the Behaviour of LSCM Anode Composites in a Segmented Planar Solid Oxide Fuel Cell.

182

Flow field design development using the segmented cell approach  

DOE Green Energy (OSTI)

We report on fuel cell flow-field development employing two-dimensional computational fluid dynamics (2-D CFD). Simulation of the flow distribution of a parallel channel flow-field, with a simple one-channel manifold, predicted inhomogeneous performance distribution within the cell. Further modeling, focusing on modification of the inlet and outlet flow fields, was used to predict a more homogeneous flow distribution in the flow-field. Attempts were made to verify the theoretical predictions experimentally by application of the segmented cell system. Measurements of the current distribution and CO transient response supported the 2-D CFD predictions. However, the margin of error between predicted and experimental results was considered insufficient to be of practical use. Future work will involve the evaluation of 3-D CFD to achieve the appropriate level of accuracy.

Bender, G. (Guido); Ramsey, J. C. (John C.)

2002-01-01T23:59:59.000Z

183

Turbine stator vane segment having internal cooling circuits  

SciTech Connect

A turbine stator vane includes outer and inner walls each having outer and inner chambers and a vane extending between the outer and inner walls. The vane includes first, second, third, fourth and fifth cavities for flowing a cooling medium. The cooling medium enters the outer chamber of the outer wall, flows through an impingement plate for impingement cooling of the outer band wall defining in part the hot gas path and through openings in the first, second and fourth cavities for flow radially inwardly, cooling the vane. The spent cooling medium flows into the inner wall and inner chamber for flow through an impingement plate radially outwardly to cool the inner wall. The spent cooling medium flows through the third cavity for egress from the turbine vane segment from the outer wall. The first, second or third cavities contain inserts having impingement openings for impingement cooling of the vane walls. The fifth cavity provides air cooling for the trailing edge.

Jones, Raymond Joseph (Oxford, MA); Burns, James Lee (Schenectady, NY); Bojappa, Parvangada Ganapathy (Simpsonville, SC); Jones, Schotsch Margaret (Greer, SC)

2003-01-01T23:59:59.000Z

184

AUTOMATIC RETINA EXUDATES SEGMENTATION WITHOUT A MANUALLY LABELLED TRAINING SET  

Science Conference Proceedings (OSTI)

Diabetic macular edema (DME) is a common vision threatening complication of diabetic retinopathy which can be assessed by detecting exudates (a type of bright lesion) in fundus images. In this work, two new methods for the detection of exudates are presented which do not use a supervised learning step and therefore do not require ground-truthed lesion training sets which are time consuming to create, difficult to obtain, and prone to human error. We introduce a new dataset of fundus images from various ethnic groups and levels of DME which we have made publicly available. We evaluate our algorithm with this dataset and compare our results with two recent exudate segmentation algorithms. In all of our tests, our algorithms perform better or comparable with an order of magnitude reduction in computational time.

Giancardo, Luca [ORNL; Meriaudeau, Fabrice [ORNL; Karnowski, Thomas Paul [ORNL; Li, Yaquin [University of Tennessee, Knoxville (UTK); Tobin Jr, Kenneth William [ORNL; Chaum, Edward [University of Tennessee, Knoxville (UTK)

2011-01-01T23:59:59.000Z

185

Estimated population near uranium tailings  

SciTech Connect

Population studies, which took place during the months of April, May, and June 1983, were performed for 27 active and 25 inactive mill sites. For each mill site, a table showing population by radius (1/2, 1, 2, 3, 4, and 5 km) in 16 compass directions was generated. 22 references, 6 tables.

Bloomster, C.H.; Brown, D.R.; Bruno, G.A.; Craig, S.N.; Dirks, J.A.; Griffin, E.A.; Reis, J.W.; Young, J.K.

1984-01-01T23:59:59.000Z

186

Actin filament segmentation using spatiotemporal active- surface and active-contour models  

Science Conference Proceedings (OSTI)

We introduce a novel algorithm for actin filament segmentation in a 2D TIRFM image sequence. We treat the 2D time-lapse sequence as a 3D image volume and propose an over-grown active surface model to segment the body of a filament on all slices simultaneously. ...

Hongsheng Li; Tian Shen; Dimitrios Vavylonis; Xiaolei Huang

2010-09-01T23:59:59.000Z

187

Geometric Approach to Hole Segmentation and Hole Closing in 3D Volumetric Objects  

Science Conference Proceedings (OSTI)

Hole segmentation (or hole filling) and hole closing in 3D volumetric objects, visualised in tomographic images, has many potential applications in material science and medicine. On the other hand there is no algorithm for hole segmentation in 3D volumetric ...

Marcin Janaszewski; Michel Couprie; Laurent Babout

2009-11-01T23:59:59.000Z

188

A Similarity Measure Between Fuzzy Regions to Obtain a Hierarchy of Fuzzy Image Segmentations  

E-Print Network (OSTI)

. in their characteristics. This idea involves the conjunction of both values, which in the Fuzzy Logic field directly lead multiscale graph theory based segmentation of color images," in Pattern Recognition, 2006. ICPR 2006. 18th theory based region merg- ing for robust image segmentation," Fuzzy Systems and Knowledge Discovery, pp

Granada, Universidad de

189

Agentification of Markov model-based segmentation: Application to magnetic resonance brain scans  

Science Conference Proceedings (OSTI)

Objective: Markov random field (MRF) models have been traditionally applied to the task of robust-to-noise image segmentation. Most approaches estimate MRF parameters on the whole image via a global expectation-maximization (EM) procedure. The resulting ... Keywords: Distributed expectation maximization, Magnetic resonance brain scan segmentation, Markov random field, Medical imaging, Multiagents system

Benoit Scherrer; Michel Dojat; Florence Forbes; Catherine Garbay

2009-05-01T23:59:59.000Z

190

A computational study of axial dispersion in segmented gas-liquid flow Metin Muradoglua  

E-Print Network (OSTI)

A computational study of axial dispersion in segmented gas-liquid flow Metin Muradoglua Department-dimensional gas-liquid flow is studied computationally using a finite-volume/front-tracking method. The effects models. © 2007 American Institute of Physics. DOI: 10.1063/1.2750295 I. INTRODUCTION Segmented gas-liquid

Muradoglu, Metin

191

Classification of coal images by a multi-scale segmentation techniques  

Science Conference Proceedings (OSTI)

This paper describes development of an automated and efficient technique for classifying different major maceral groups within polished coal blocks. Coal utilisation processes can be significantly affected by the distribution of macerals in the feed ... Keywords: coal images classification, computational complexity, image classification, image segmentation, maceral groups, multi-scale segmentation techniques, pixel values, polished coal blocks, probability, statistical model, transition distribution

1995-11-01T23:59:59.000Z

192

Image segmentation using quadtree-based similarity graph and normalized cut  

Science Conference Proceedings (OSTI)

The graph cuts in image segmentation have been widely used in recent years because it regards the problem of image partitioning as a graph partitioning issue, a well-known problem in graph theory. The normalized cut approach uses spectral graph properties ... Keywords: graph partitioning, image segmentation, quadtree, spectral graph

Marco Antonio Garcia De Carvalho; Anselmo Castelo Branco Ferreira; André Luis Costa

2010-11-01T23:59:59.000Z

193

Registration and interactive planar segmentation for stereo images of polyhedral scenes  

Science Conference Proceedings (OSTI)

We introduce a two-step iterative segmentation and registration method to find coplanar surfaces among stereo images of a polyhedral environment. The novelties of this paper are: (i) to propose a user-defined initialization easing the image matching ... Keywords: Color, Coplanarity, Interactive computer vision, Registration, Segmentation, Stereo

Javier Flavio Vigueras; Mariano Rivera

2010-02-01T23:59:59.000Z

194

Jaw tissues segmentation in dental 3D CT images using fuzzy-connectedness and morphological processing  

Science Conference Proceedings (OSTI)

The success of oral surgery is subject to accurate advanced planning. In order to properly plan for dental surgery or a suitable implant placement, it is necessary an accurate segmentation of the jaw tissues: the teeth, the cortical bone, the trabecular ... Keywords: Automatic computer-aided surgery, Fuzzy connectedness, Inferior alveolar nerve, Jaw tissue segmentation/reconstruction

Roberto LloréNs; Valery Naranjo; Fernando LóPez; Mariano AlcañIz

2012-11-01T23:59:59.000Z

195

Implementing automatic spot addressing and contour based segmentation in microarray image analysis  

Science Conference Proceedings (OSTI)

DNA microarrays have become a widely used technique by geneticists to diagnose or treat diseases through gene expression. The process of analysis gene expression with DNA microarrays is based on the hybridization of a tissue's DNA sequence into a substrate ... Keywords: DNA microarrays, contour segmentation, edge detection, image processing, segmentation, spot addressing

Alexandra Oliveros; Miguel Sotaquirá

2008-08-01T23:59:59.000Z

196

Tubular Surface Evolution for Segmentation of the Cingulum Bundle From DW-MRI  

E-Print Network (OSTI)

Tubular Surface Evolution for Segmentation of the Cingulum Bundle From DW-MRI Vandana Mohan1 Diffusion-Weighted Imagery (DW-MRI) of the brain. The CB is a tube-like structure in the brain, but vary globally. Standard region-based segmentation tech- niques adapted to DW-MRI are not suitable here

Paris-Sud XI, Université de

197

Bayesian inference for multiband image segmentation via model-based cluster trees  

Science Conference Proceedings (OSTI)

We consider the problem of multiband image clustering and segmentation. We propose a new methodology for doing this, called model-based cluster trees. This is grounded in model-based clustering, which bases inference on finite mixture models estimated ... Keywords: Bayesian model, Clustering, Hyperspectral, Information criterion, Information fusion, Ising, Markov model, Multiband, Multichannel, Multispectral, Potts, Quantization, Segmentation

Fionn Murtagh; Adrian E. Raftery; Jean-Luc Starck

2005-06-01T23:59:59.000Z

198

3D human posture segmentation by spectral clustering with surface normal constraint  

Science Conference Proceedings (OSTI)

In this paper, we propose a new algorithm for partitioning human posture represented by 3D point clouds sampled from the surface of human body. The algorithm is formed as a constrained extension of the recently developed segmentation method, spectral ... Keywords: 3D human posture segmentation, Constrained spectral clustering

Jun Cheng; Maoying Qiao; Wei Bian; Dacheng Tao

2011-09-01T23:59:59.000Z

199

Phase Contrast Microscopy with Soft and Hard X-rays Using a Segmented  

E-Print Network (OSTI)

Phase Contrast Microscopy with Soft and Hard X-rays Using a Segmented Detector A Dissertation Contrast Microscopy with Soft and Hard X-rays Using a Segmented Detector by Benjamin Hornberger Doctor. In the hard x-ray range (multi-keV), the main focus lies on trace ele- ment mapping by x-ray fluorescence

200

3D vector flow guided segmentation of airway wall in MSCT  

Science Conference Proceedings (OSTI)

This paper develops a 3D automated approach for airway wall segmentation and quantification inMSCT based on a patient-specific deformable model. The model is explicitly defined as a triangular surface mesh at the level of the airway lumen segmented from ...

Margarete Ortner; Catalin Fetita; Pierre-Yves Brillet; Françoise Prêteux; Philippe Grenier

2010-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Application of particle swarm optimization and perceptual map to tourist market segmentation  

Science Conference Proceedings (OSTI)

This study intends to apply particle swarm optimization algorithm to cluster analysis for investigating market segmentation of Taiwanese tourists based on their motivation to visit Indonesia. In addition, Taiwanese tourists' preference of several types ... Keywords: Cluster analysis, Market segmentation, Particle swarm optimization, Perceptual map

R. J. Kuo; Kartika Akbaria; Budiarto Subroto

2012-08-01T23:59:59.000Z

202

Automatic segmentation of non-enhancing brain tumors in magnetic resonance images  

Science Conference Proceedings (OSTI)

Tumor segmentation from magnetic resonance (MR) images may aid in tumor treatment by tracking the progress of tumor growth and/or shrinkage. In this paper we present the first automatic segmentation method which separates non-enhancing brain tumors from ... Keywords: Automatic tissue classification, Fuzzy clustering, Image processing, MRI, Non-enhancing brain tumors

Lynn M Fletcher-Heath; Lawrence O Hall; Dmitry B Goldgof; F.Reed Murtagh

2001-01-01T23:59:59.000Z

203

Segmentation of nerve bundles and ganglia in spine MRI using particle filters  

Science Conference Proceedings (OSTI)

Automatic segmentation of spinal nerve bundles that originate within the dural sac and exit the spinal canal is important for diagnosis and surgical planning. The variability in intensity, contrast, shape and direction of nerves seen in high resolution ... Keywords: nerve bundles, particle filter, segmentation, tracking

Adrian Dalca; Giovanna Danagoulian; Ron Kikinis; Ehud Schmidt; Polina Golland

2011-09-01T23:59:59.000Z

204

Global structure constrained local shape prior estimation for medical image segmentation  

Science Conference Proceedings (OSTI)

Organ shape plays an important role in clinical diagnosis, surgical planning and treatment evaluation. Shape modeling is a critical factor affecting the performance of deformable model based segmentation methods for organ shape extraction. In most existing ... Keywords: Manifold assumption, Manifold learning, Medical image segmentation, Target-oriented shape modeling

Pingkun Yan, Wuxia Zhang, Baris Turkbey, Peter L. Choyke, Xuelong Li

2013-09-01T23:59:59.000Z

205

Comparison of segmentation algorithms for cow contour extraction from natural barn background in side view images  

Science Conference Proceedings (OSTI)

Computer vision techniques are a means to extract individual animal information such as weight, activity and calving time in intensive farming. Automatic detection requires adequate image pre-processing such as segmentation to precisely distinguish the ... Keywords: Background segmentation, Computer vision, Cow contour, Dairy cattle, Static background

T. Van Hertem; V. Alchanatis; A. Antler; E. Maltz; I. Halachmi; A. Schlageter-Tello; C. Lokhorst; S. Viazzi; C. E. B. Romanini; A. Pluk; C. Bahr; D. Berckmans

2013-02-01T23:59:59.000Z

206

Connected Components for a Fast and Robust 2D Lidar Data Segmentation  

Science Conference Proceedings (OSTI)

The paper presents a novel segmentation approach applied to a two-dimensional point-cloud extracted by a LIDAR device. The most common approaches perform well in outdoor environments where usually furniture and other objects are rather big and are composed ... Keywords: 2D Lidar Segmentation, Connected Component, Intelligent Vehicles, Point-cloud analysis, Unmanned Ground Vehicle

Daniel Oñoro Rubio, Artem Lenskiy, Jee-Hwan Ryu

2013-07-01T23:59:59.000Z

207

Analysis of Scalar Maps for the Segmentation of the Corpus Callosum in Diffusion Tensor Fields  

Science Conference Proceedings (OSTI)

Diffusion tensor imaging (DTI) is a powerful technique for imaging axonal anatomy in vivo and its automatic segmentation is important for quantitative analysis and visualization. Application of the watershed transform is a recent approach for robustly ... Keywords: Corpus Callosum, Diffusion scalar maps, Diffusion tensor imaging, Mathematical morphology, Segmentation, Watershed

Leticia Rittner; Jennifer S. Campbell; Pedro F. Freitas; Simone Appenzeller; G. Bruce Pike; Roberto A. Lotufo

2013-03-01T23:59:59.000Z

208

How to Extract the Geometry and Topology from Very Large 3D Segmentations  

E-Print Network (OSTI)

Segmentation is often an essential intermediate step in image analysis. A volume segmentation characterizes the underlying volume image in terms of geometric information--segments, faces between segments, curves in which several faces meet--as well as a topology on these objects. Existing algorithms encode this information in designated data structures, but require that these data structures fit entirely in Random Access Memory (RAM). Today, 3D images with several billion voxels are acquired, e.g. in structural neurobiology. Since these large volumes can no longer be processed with existing methods, we present a new algorithm which performs geometry and topology extraction with a runtime linear in the number of voxels and log-linear in the number of faces and curves. The parallelizable algorithm proceeds in a block-wise fashion and constructs a consistent representation of the entire volume image on the hard drive, making the structure of very large volume segmentations accessible to image analysis. The paral...

Andres, Bjoern; Kroeger, Thorben; Hamprecht, Fred A

2010-01-01T23:59:59.000Z

209

Adaptive Breast Radiation Therapy Using Modeling of Tissue Mechanics: A Breast Tissue Segmentation Study  

Science Conference Proceedings (OSTI)

Purpose: To validate and compare the accuracy of breast tissue segmentation methods applied to computed tomography (CT) scans used for radiation therapy planning and to study the effect of tissue distribution on the segmentation accuracy for the purpose of developing models for use in adaptive breast radiation therapy. Methods and Materials: Twenty-four patients receiving postlumpectomy radiation therapy for breast cancer underwent CT imaging in prone and supine positions. The whole-breast clinical target volume was outlined. Clinical target volumes were segmented into fibroglandular and fatty tissue using the following algorithms: physical density thresholding; interactive thresholding; fuzzy c-means with 3 classes (FCM3) and 4 classes (FCM4); and k-means. The segmentation algorithms were evaluated in 2 stages: first, an approach based on the assumption that the breast composition should be the same in both prone and supine position; and second, comparison of segmentation with tissue outlines from 3 experts using the Dice similarity coefficient (DSC). Breast datasets were grouped into nonsparse and sparse fibroglandular tissue distributions according to expert assessment and used to assess the accuracy of the segmentation methods and the agreement between experts. Results: Prone and supine breast composition analysis showed differences between the methods. Validation against expert outlines found significant differences (P<.001) between FCM3 and FCM4. Fuzzy c-means with 3 classes generated segmentation results (mean DSC = 0.70) closest to the experts' outlines. There was good agreement (mean DSC = 0.85) among experts for breast tissue outlining. Segmentation accuracy and expert agreement was significantly higher (P<.005) in the nonsparse group than in the sparse group. Conclusions: The FCM3 gave the most accurate segmentation of breast tissues on CT data and could therefore be used in adaptive radiation therapy-based on tissue modeling. Breast tissue segmentation methods should be used with caution in patients with sparse fibroglandular tissue distribution.

Juneja, Prabhjot, E-mail: Prabhjot.Juneja@icr.ac.uk [Joint Department of Physics, Institute of Cancer Research, Sutton (United Kingdom)] [Joint Department of Physics, Institute of Cancer Research, Sutton (United Kingdom); Harris, Emma J. [Joint Department of Physics, Institute of Cancer Research, Sutton (United Kingdom)] [Joint Department of Physics, Institute of Cancer Research, Sutton (United Kingdom); Kirby, Anna M. [Department of Academic Radiotherapy, Royal Marsden National Health Service Foundation Trust, Sutton (United Kingdom)] [Department of Academic Radiotherapy, Royal Marsden National Health Service Foundation Trust, Sutton (United Kingdom); Evans, Philip M. [Joint Department of Physics, Institute of Cancer Research, Sutton (United Kingdom)] [Joint Department of Physics, Institute of Cancer Research, Sutton (United Kingdom)

2012-11-01T23:59:59.000Z

210

Unsupervised Segmentation of Object Shadow and Highlight Using Statistical Snakes  

E-Print Network (OSTI)

This paper deals with the detection and analysis of objects in side-scan sonar images for target identifi cation. The initial step for any identification is a good segmentation of the scene and a reliable extraction of the shadow of the object. The literature reports various techniques for detecting the shadow of objects on the seabed, the most popular of which is based on the use of Markov Random Field (MRF) models. We introduce in this paper, a new technique based on a statistical snake to perform this operation. This technique relies on the modeling of the shadow and non-shadow regions as probability density models expressed as exponential laws (Gaussian, Rayleigh, Poisson,..) which are well suited to the physics of sonar sensing. The algorithm determines the snake shape that optimally separates the scene into regions described by the same probability density function utilising a Monte Carlo Markov Chain (MCMC) method to drive the snake. Moreover, as in classical snake techniques, the shape can be constrained via an intrinsic energy term enabling a model-based search for man-made objects in the image. The problems introduced by directional seabeds are discussed and the use of directional filters to extract further information investigated. This

Scott Reed; Judith Bell; Yvan Petillot

2001-01-01T23:59:59.000Z

211

"Arab Americans and Segmented Assimilation: Looking Beyond the Theory to the Reality in the Detroit Metro Area".  

E-Print Network (OSTI)

??This thesis aims to apply Segmented Assimilation Theory to the Arab-American community in Metropolitan Detroit. Segmented assimilation theory relates to second-generation immigrants, and proposes three… (more)

Weaver, Kristin

2010-01-01T23:59:59.000Z

212

Track segments in hadronic showers in a highly granular scintillator-steel hadron calorimeter  

E-Print Network (OSTI)

We investigate the three dimensional substructure of hadronic showers in the CALICE scintillator-steel hadronic calorimeter. The high granularity of the detector is used to find track segments of minimum ionising particles within hadronic showers, providing sensitivity to the spatial structure and the details of secondary particle production in hadronic cascades. The multiplicity, length and angular distribution of identified track segments are compared to GEANT4 simulations with several different shower models. Track segments also provide the possibility for in-situ calibration of highly granular calorimeters.

CALICE Collaboration; C. Adloff; J. -J. Blaising; M. Chefdeville; C. Drancourt; R. Gaglione; N. Geffroy; Y. Karyotakis; I. Koletsou; J. Prast; G. Vouters; K. Francis; J. Repond; J. Schlereth; J. Smith; L. Xia; E. Baldolemar; J. Li; S. T. Park; M. Sosebee; A. P. White; J. Yu; G. Eigen; Y. Mikami; N. K. Watson; G. Mavromanolakis; M. A. Thomson; D. R. Ward; W. Yan; D. Benchekroun; A. Hoummada; Y. Khoulaki; J. Apostolakis; D. Dannheim; A. Dotti; G. Folger; V. Ivantchenko; W. Klempt; E. van der Kraaij; A. -I. Lucaci-Timoce; A. Ribon; D. Schlatter; V. Uzhinskiy; C. Carloganu; P. Gay; S. Manen; L. Royer; M. Tytgat; N. Zaganidis; G. C. Blazey; A. Dyshkant; J. G. R. Lima; V. Zutshi; J. -Y. Hostachy; L. Morin; U. Cornett; D. David; G. Falley; K. Gadow; P. Göttlicher; C. Günter; O. Hartbrich; B. Hermberg; S. Karstensen; F. Krivan; K. Krüger; S. Lu; S. Morozov; V. Morgunov; M. Reinecke; F. Sefkow; P. Smirnov; M. Terwort; N. Feege; E. Garutti; S. Laurien; I. Marchesini; M. Matysek; M. Ramilli; K. Briggl; P. Eckert; T. Harion; H. -Ch. Schultz-Coulon; W. Shen; R. Stamen; B. Bilki; E. Norbeck; Y. Onel; G. W. Wilson; K. Kawagoe; Y. Sudo; T. Yoshioka; P. D. Dauncey; A. -M. Magnan; V. Bartsch; M. Wing; F. Salvatore; E. Cortina Gil; S. Mannai; G. Baulieu; P. Calabria; L. Caponetto; C. Combaret; R. Della Negra; G. Grenier; R. Han; J-C. Ianigro; R. Kieffer; I. Laktineh; N. Lumb; H. Mathez; L. Mirabito; A. Petrukhin; A. Steen; W. Tromeur; M. Vander Donckt; Y. Zoccarato; E. Calvo Alamillo; M. -C. Fouz; J. Puerta-Pelayo; F. Corriveau; B. Bobchenko; M. Chadeeva; M. Danilov; A. Epifantsev; O. Markin; R. Mizuk; E. Novikov; V. Popov; V. Rusinov; E. Tarkovsky; N. Kirikova; V. Kozlov; P. Smirnov; Y. Soloviev; P. Buzhan; A. Ilyin; V. Kantserov; V. Kaplin; A. Karakash; E. Popova; V. Tikhomirov; C. Kiesling; K. Seidel; F. Simon; C. Soldner; M. Szalay; M. Tesar; L. Weuste; M. S. Amjad; J. Bonis; S. Callier; S. Conforti di Lorenzo; P. Cornebise; Ph. Doublet; F. Dulucq; J. Fleury; T. Frisson; N. van der Kolk; H. Li; G. Martin-Chassard; F. Richard; Ch. de la Taille; R. Pöschl; L. Raux; J. Rouene; N. Seguin-Moreau; M. Anduze; V. Balagura; V. Boudry; J-C. Brient; R. Cornat; M. Frotin; F. Gastaldi; E. Guliyev; Y. Haddad; F. Magniette; G. Musat; M. Ruan; T. H. Tran; H. Videau; B. Bulanek; J. Zacek; J. Cvach; P. Gallus; M. Havranek; M. Janata; J. Kvasnicka; D. Lednicky; M. Marcisovsky; I. Polak; J. Popule; L. Tomasek; M. Tomasek; P. Ruzicka; P. Sicho; J. Smolik; V. Vrba; J. Zalesak; B. Belhorma; H. Ghazlane; K. Kotera; T. Takeshita; S. Uozumi; D. Jeans; M. Götze; J. Sauer; S. Weber; C. Zeitnitz

2013-05-30T23:59:59.000Z

213

Copy number: Efficient algorithms for single- and multi-track copy number segmentation  

E-Print Network (OSTI)

of the last segment (dkj ), the optimal cost of the segmentation up until that point (ej?1) and the penalty for the break point (? ): ek = min j?{1,...,k} (dkj + ej?1 + ? ) where e0 = 0. The main work load of the above com- putation is to determine dkj for all... are common, while the estimated level in each segment is determined by the indi- vidual DTC/primary tumor. In Figure 5, two of the single cells seem to have a pattern similar to the primary tumor. The last one has an essentially flat (balanced) profile...

Nilsen, Gro; Liestøl, Knut; Loo, Peter Van; Moen Vollan, Hans Kristian; Eide, Marianne B; Rueda, Oscar M; Chin, Suet-Feung; Russell, Roslin; Baumbusch, Lars O; Caldas, Carlos; Børresen-Dale, Anne-Lise; Lingjærde, Ole Christian

2012-11-04T23:59:59.000Z

214

A robust kernel-based fuzzy c-means algorithm by incorporating suppressed and magnified membership for MRI image segmentation  

Science Conference Proceedings (OSTI)

Bias-corrected fuzzy c-means (BCFCM) algorithm with spatial information has been proven effective for image segmentation. It still lacks enough robustness to noise and outliers. Some kernel versions of FCM with spatial constraints, such as KFCM_S1, ... Keywords: Kernel-based FCM, fuzzy c-means (FCM), image segmentation, magic resonance image segmentation, spatial bias correction, suppressed membership

Hsu-Shen Tsai; Wen-Liang Hung; Miin-Shen Yang

2012-10-01T23:59:59.000Z

215

Using Doppler spectra to separate hydrometeor populations and analyze ice precipitation in multilayered mixed-phase clouds  

SciTech Connect

Multimodality of cloud radar Doppler spectra is used to partition cloud particle phases and to separate distinct ice populations in the radar sample volume, thereby facilitating analysis of individual ice showers in multilayered mixed-phase clouds. A 35-GHz cloud radar located at Barrow, Alaska, during the Mixed-Phase Arctic Cloud Experiment collected the Doppler spectra. Data from a pair of collocated depolarization lidars confirmed the presence of two liquid cloud layers reported in this study. Surprisingly, both of these cloud layers were embedded in ice precipitation yet maintained their liquid. Our spectral separation of the ice precipitation yielded two distinct ice populations: ice initiated within the two liquid cloud layers and ice precipitation formed in higher cloud layers. Comparisons of ice fall velocity versus radar reflectivity relationships derived for distinct showers reveal that a single relationship might not properly represent the ice showers during this period.

Rambukkange, Mahlon P.; Verlinde, J.; Eloranta, E. W.; Flynn, Connor J.; Clothiaux, Eugene E.

2011-01-31T23:59:59.000Z

216

Weighted Time Warping for Temporal Segmentation of Multi-Parameter Physiological Signals  

E-Print Network (OSTI)

We present a novel approach to segmenting a quasiperiodic multi-parameter physiological signal in the presence of noise and transient corruption. We use Weighted Time Warping (WTW), to combine the partially correlated ...

Ganeshapillai, Gartheeban

217

Vortex nozzle for segmenting and transporting metal chips from turning operations  

DOE Patents (OSTI)

Apparatus for collecting, segmenting and conveying metal chips from machining operations utilizes a compressed gas driven vortex nozzle for receiving the chip and twisting it to cause the chip to segment through the application of torsional forces to the chip. The vortex nozzle is open ended and generally tubular in shape with a converging inlet end, a constant diameter throat section and a diverging exhaust end. Compressed gas is discharged through angled vortex ports in the nozzle throat section to create vortex flow in the nozzle and through an annular inlet at the entrance to the converging inlet end to create suction at the nozzle inlet and cause ambient air to enter the nozzle. The vortex flow in the nozzle causes the metal chip to segment and the segments thus formed to pass out of the discharge end of the nozzle where they are collected, cleaned and compacted as needed.

Bieg, L.F.

1993-04-20T23:59:59.000Z

218

Operation of a Segmented Hall Thruster with Low-sputtering Carbon-velvet Electrodes  

Science Conference Proceedings (OSTI)

Carbon fiber velvet material provides exceptional sputtering resistance properties exceeding those for graphite and carbon composite materials. A 2 kW Hall thruster with segmented electrodes made of this material was operated in the discharge voltage range of 200–700 V. The arcing between the floating velvet electrodes and the plasma was visually observed, especially, during the initial conditioning time, which lasted for about 1 h. The comparison of voltage versus current and plume characteristics of the Hall thruster with and without segmented electrodes indicates that the magnetic insulation of the segmented thruster improves with the discharge voltage at a fixed magnetic field. The observations reported here also extend the regimes wherein the segmented Hall thruster can have a narrower plume than that of the conventional nonsegmented thruster.

Raitses, Y.; Staack, D.; Dunaevsky, A.; Fisch, N.J.

2005-12-01T23:59:59.000Z

219

Plume Dispersion Simulation in Low-Wind Conditions Using Coupled Plume Segment and Gaussian Puff Approaches  

Science Conference Proceedings (OSTI)

Short-range diffusion experiments conducted at Idaho National Engineering Laboratory in light-wind stable conditions have been simulated using a mathematical model that combines plume segment and Gaussian puff approaches. The model is shown to ...

Maithili Sharan; Anil Kumar Yadav; M. P. Singh

1996-10-01T23:59:59.000Z

220

Manual labeling strategy for ground truth estimation in MRI glial tumor segmentation  

Science Conference Proceedings (OSTI)

In this paper we focused our attention on the problem of determining reliable ground truth for validating unsupervised, fully automatic MRI brain tumor segmentation procedures in the clinical context of Glial Tumor treatment. The goal was achieved by ...

Valentina Pedoia; Alessandro De Benedictis; Giuseppe Renis; Emanuele Monti; Sergio Balbi; Elisabetta Binaghi

2012-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Filtrage anisotrope robuste et segmentation par B-spline snake : application aux images échographiques.  

E-Print Network (OSTI)

??Le contexte de ce travail est le traitement d'images échographiques. Plus précisément, on s'est intéressé au filtrage et à la segmentation automatique d'images dégradées par… (more)

Tauber, Clovis

2005-01-01T23:59:59.000Z

222

Vortex nozzle for segmenting and transporting metal chips from turning operations  

DOE Patents (OSTI)

This invention is comprised of an apparatus for collecting, segmenting and conveying metal chips from machining operations which utilizes a compressed gas driven vortex nozzle for receiving the chip and twisting it to cause the chip to segment through the application of torsional forces to the chip. The vortex nozzle is open ended and generally tubular in shape with a converging inlet end, a constant diameter throat section and a diverging exhaust end. Compressed gas is discharged through angled vortex ports in the nozzle throat section to create vortex flow in the nozzle and through an annular inlet at the entrance to the converging inlet end to create suction at the nozzle inlet and cause ambient air to enter the nozzle. The vortex flow in the nozzle causes the metal chip to segment and the segments thus formed to pass out of the discharge end of the nozzle where they are collected, cleaned and compacted as needed.

Bieg, L.F.

1992-12-31T23:59:59.000Z

223

Radiation protection training for diverse general employee populations  

Science Conference Proceedings (OSTI)

Radiation protection training for the general employee at the Oak Ridge National Laboratory has undergone a great deal of restructuring in the last two years. The number of personnel totally dedicated to nuclear facilities is less than a fifth of our employees and the percentage of contracted employees who are dedicated radiation workers is much smaller. However, the aging of our facilities and increasing emphasis on environmental control means that everyone needs to understand the basics of radiation protection. In accordance with changing DOE guidelines and internal ORNL policies, greater emphasis has been placed on keeping training focused on current issues, training the total workforce, and requiring some type of testing or feedback mechanism. This report describes efforts to instill respect, but not fear, of radiation in the work environment. Flexible tools are being developed to meet this objective for several diverse general employee populations. Continuing efforts include consideration of computer-based training for retraining, developing additional modules for specialized groups and jobs, and testing/documentation appropriate to each population segment. 6 refs.

Copenhaver, E.D.; Houser, B.S.

1986-01-01T23:59:59.000Z

224

A Distinctive Energy Policy for Scotland? The Impact of Low Carbon Generation on the Future Price of  

E-Print Network (OSTI)

A Distinctive Energy Policy for Scotland? The Impact of Low Carbon Generation on the Future Price Distinctive Energy Policy for Scotland?' explores the emergence of a distinctive energy policy for Scotland and raises the issue of the desirability of any differentiation from UK energy policy. Although

Mottram, Nigel

225

An extended segment pattern dictionary for pattern matching tracking algorithm at BESIII  

E-Print Network (OSTI)

A pattern matching based tracking algorithm, named MdcPatRec, is used for the reconstruction of charged tracks in the drift chamber of the BESIII detector. This paper addresses the shortage of segment finding in MdcPatRec algorithm. An extended segment construction scheme and the corresponding pattern dictionary are presented. Evaluation with Monte-Carlo and experimental data show that the new method can achieve higher efficiency for low transverse momentum tracks.

Changli Ma; Yao Zhang; Ye Yuan; Xiao-Rui LU; Yangheng Zheng; Kanglin He; Weidong Li; Huaiming Liu; Qiumei Ma; Linghui Wu

2013-05-04T23:59:59.000Z

226

Segmentation of the Outer Contact on P-Type Coaxial Germanium Detectors  

Science Conference Proceedings (OSTI)

Germanium detector arrays are needed for low-level counting facilities. The practical applications of such user facilities include characterization of low-level radioactive samples. In addition, the same detector arrays can also perform important fundamental physics measurements including the search for rare events like neutrino-less double-beta decay. Coaxial germanium detectors having segmented outer contacts will provide the next level of sensitivity improvement in low background measurements. The segmented outer detector contact allows performance of advanced pulse shape analysis measurements that provide additional background reduction. Currently, n-type (reverse electrode) germanium coaxial detectors are used whenever a segmented coaxial detector is needed because the outer boron (electron barrier) contact is thin and can be segmented. Coaxial detectors fabricated from p-type germanium cost less, have better resolution, and are larger than n-type coaxial detectors. However, it is difficult to reliably segment p-type coaxial detectors because thick (~1 mm) lithium-diffused (hole barrier) contacts are the standard outside contact for p-type coaxial detectors. During this Phase 1 Small Business Innovation Research (SBIR) we have researched the possibility of using amorphous germanium contacts as a thin outer contact of p-type coaxial detectors that can be segmented. We have developed amorphous germanium contacts that provide a very high hole barrier on small planar detectors. These easily segmented amorphous germanium contacts have been demonstrated to withstand several thousand volts/cm electric fields with no measurable leakage current (<1 pA) from charge injection over the hole barrier. We have also demonstrated that the contact can be sputter deposited around and over the curved outside surface of a small p-type coaxial detector. The amorphous contact has shown good rectification properties on the outside of a small p-type coaxial detector. These encouraging results are the first fundamental steps toward demonstrating the viability of the amorphous germanium contacts for much larger segmented p-type coaxial detectors. Large segmented p-type coaxial detectors based on this technology could serve as the gamma-ray spectrometers on instruments such as the Radionuclide Aerosol Sampler/Analyzer (RASA). These detectors will provide a more sensitive, lower background measurement than currently available unsegmented p-type coaxial detectors.

Hull, Ethan L.; Pehl, Richard H.; Lathrop, James R.; Martin, Gregory N.; Mashburn, R. B.; Miley, Harry S.; Aalseth, Craig E.; Hossbach, Todd W.

2006-09-21T23:59:59.000Z

227

TWO POPULATIONS OF MOLECULAR CLOUDS IN THE ANTENNAE GALAXIES  

SciTech Connect

Super star clusters-extremely massive clusters found predominately in starburst environments-are essential building blocks in the formation of galaxies and thought to dominate star formation in the high-redshift universe. However, the transformation from molecular gas into these ultracompact star clusters is not well understood. To study this process, we used the Submillimeter Array and the Plateau de Bure Interferometer to obtain high angular resolution ({approx}1.''5 or 160 pc) images of the Antennae overlap region in CO(2-1) to search for the molecular progenitors of the super star clusters. We resolve the molecular gas distribution into a large number of clouds, extending the differential cloud mass function down to a 5{sigma} completeness limit of 3.8 Multiplication-Sign 10{sup 5} M{sub Sun }. We identify a distinct break in the mass function around log M{sub mol}/M{sub Sun} Almost-Equal-To 6.5, which separates the molecular clouds into two distinct populations. The smaller, less massive clouds reside in more quiescent areas in the region, while the larger, more massive clouds cluster around regions of intense star formation. A broken power-law fit to the mass function yields slopes of {alpha} = -1.39 {+-} 0.10 and {alpha} = -1.44 {+-} 0.14 for the low- and high-mass cloud population, well matched to the mass function found for super star clusters in the Antennae galaxies. We find large velocity gradients and velocity dispersions at the locations of intense star formation, suggestive of compressive shocks. It is likely that these environmental factors contribute to the formation of the observed massive molecular clouds and super star clusters in the Antennae galaxies.

Wei, Lisa H.; Keto, Eric [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Ho, Luis C. [The Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101 (United States)

2012-05-10T23:59:59.000Z

228

Semi-Automated Neuron Boundary Detection and Nonbranching Process Segmentation in Electron Microscopy Images  

SciTech Connect

Neuroscientists are developing new imaging techniques and generating large volumes of data in an effort to understand the complex structure of the nervous system. The complexity and size of this data makes human interpretation a labor-intensive task. To aid in the analysis, new segmentation techniques for identifying neurons in these feature rich datasets are required. This paper presents a method for neuron boundary detection and nonbranching process segmentation in electron microscopy images and visualizing them in three dimensions. It combines both automated segmentation techniques with a graphical user interface for correction of mistakes in the automated process. The automated process first uses machine learning and image processing techniques to identify neuron membranes that deliniate the cells in each two-dimensional section. To segment nonbranching processes, the cell regions in each two-dimensional section are connected in 3D using correlation of regions between sections. The combination of this method with a graphical user interface specially designed for this purpose, enables users to quickly segment cellular processes in large volumes.

Jurrus, Elizabeth R.; Watanabe, Shigeki; Giuly, Richard J.; Paiva, Antonio R.; Ellisman, Mark H.; Jorgensen, Erik M.; Tasdizen, Tolga

2013-01-01T23:59:59.000Z

229

Application of Micro-segmentation Algorithms to the Healthcare Market:A Case Study  

Science Conference Proceedings (OSTI)

We draw inspiration from the recent success of loyalty programs and targeted personalized market campaigns of retail companies such as Kroger, Netflix, etc. to understand beneficiary behaviors in the healthcare system. Our posit is that we can emulate the financial success the companies have achieved by better understanding and predicting customer behaviors and translating such success to healthcare operations. Towards that goal, we survey current practices in market micro-segmentation research and analyze health insurance claims data using those algorithms. We present results and insights from micro-segmentation of the beneficiaries using different techniques and discuss how the interpretation can assist with matching the cost-effective insurance payment models to the beneficiary micro-segments.

Sukumar, Sreenivas R [ORNL; Aline, Frank [ORNL

2013-01-01T23:59:59.000Z

230

Evaluation of radioactive background rejection in 76Ge neutrino-lessdouble-beta decay experiments using a highly segmented HPGe detector  

Science Conference Proceedings (OSTI)

A highly segmented coaxial HPGe detector was operated in a low background counting facility for over 1 year to experimentally evaluate possible segmentation strategies for the proposed Majorana neutrino-less double-beta decay experiment. Segmentation schemes were evaluated on their ability to reject multi-segment events while retaining single-segment events. To quantify a segmentation scheme's acceptance efficiency the percentage of peak area due to single segment events was calculated for peaks located in the energy region 911-2614 keV. Single interaction site events were represented by the double-escape peak from the 2614 keV decay in {sup 208}Tl located at 1592 keV. In spite of its prototypical nature, the detector performed well under realistic operating conditions and required only minimal human interaction. Though the energy resolution for events with interactions in multiple segments was impacted by inter-segment cross-talk, the implementation of a cross-talk correlation matrix restored acceptable resolution. Additionally, simulations utilizing the MaGe simulation package were performed and found to be in good agreement with experimental observations verifying the external nature of the background radiation.

Chan, Yuen-Dat; Campbell, D.B.; Vetter, K.; Henning, R.; Lesko, K.; Chan, Y.D.; Poon, A.W.P.; Perry, M.; Hurley, D.; Smith, A.R.

2007-02-05T23:59:59.000Z

231

How Effective are "Off-The-Shelf" Segmentation Tools for Selling Energy Products?  

Science Conference Proceedings (OSTI)

The promise of market segmentation tools has always been that they offer the opportunity to make a company's marketing efforts more efficient by helping them to focus on the best, or easiest, target customers. To date, it has not been clear whether the off-the-shelf customer segmentation tools developed for other industries would be useful to retailers interested in selling energy products and services. It is also uncertain which of several available tools is likely to be the best option to use. This rep...

1999-11-09T23:59:59.000Z

232

A survey of shaped-based registration and segmentation techniques for cardiac images  

Science Conference Proceedings (OSTI)

Heart disease is the leading cause of death in the modern world. Cardiac imaging is routinely applied for assessment and diagnosis of cardiac diseases. Computerized image analysis methods are now widely applied to cardiac segmentation and registration ... Keywords: AAM, ASM, CT, CVD, Cardiac CT, Cardiac MR, Cardiac motion, Cardiac registration, Cardiac segmentation, EB, EDV, EF, EFFD, EM, ESV, Echocardiography, Endo, Epi, FE, FFD, Four CH, GMM, GRPM, LA, LADA, LAX, LCX, LV, MI, MIA, MRF, MRI, N, N/A, NMI, NURBS, P, PCA, PET, PM, RA, RPM, RV, Review article, SAD, SAX, SM, SPECT, SSD, TDI, TEE, TMI, US

Vahid Tavakoli, Amir A. Amini

2013-09-01T23:59:59.000Z

233

Sub-aperture piston phase diversity for segmented and multi-aperture systems  

Science Conference Proceedings (OSTI)

Phase diversity is a method of image-based wavefront sensing that simultaneously estimates the unknown phase aberrations of an imaging system along with an image of the object. To perform this estimation a series of images differing by a known aberration, typically defocus, are used. In this paper we present a new method of introducing the diversity unique to segmented and multi-aperture systems in which individual segments or sub-apertures are pistoned with respect to one another. We compare this new diversity with the conventional focus diversity.

Bolcar, Matthew R.; Fienup, James R

2009-01-01T23:59:59.000Z

234

Statistical description of heavy truck accidents on representative segments of interstate highway  

SciTech Connect

Any quantitative analysis of the risk of transportation accidents requires the use of many different statistical distributions. Included among these are the types of accidents which occur and the severity of these when they do occur. Several previous studies have derived this type of information for truck traffic over U. S. highways in general; these data are not necessarily applicable for the anticipated LMFBR spent fuel cask routes. This report presents data for highway segments representative of the specific LMFBR cask routes which are anticipated. These data are based upon a detailed record-by-record review of filed reports for accidents which occurred along the specified route segments.

Hartman, W.F.; Davidson, C.A.; Foley, J.T.

1977-01-01T23:59:59.000Z

235

Molecular analysis of the metabolic rates of discrete subsurface populations of sulfate reducers  

SciTech Connect

Elucidating the in situ metabolic activity of phylogenetically diverse populations of sulfate-reducing microorganisms that populate anoxic sedimentary environments is key to understanding subsurface ecology. Previous pure culture studies have demonstrated that transcript abundance of dissimilatory (bi)sulfite reductase genes is correlated with the sulfate reducing activity of individual cells. To evaluate whether expression of these genes was diagnostic for subsurface communities, dissimilatory (bi)sulfite reductase gene transcript abundance in phylogenetically distinct sulfate-reducing populations was quantified during a field experiment in which acetate was added to uranium-contaminated groundwater. Analysis of dsrAB sequences prior to the addition of acetate indicated that Desulfobacteraceae, Desulfobulbaceae, and Syntrophaceae-related sulfate reducers were the most abundant. Quantifying dsrB transcripts of the individual populations suggested that Desulfobacteraceae initially had higher dsrB transcripts per cell than Desulfobulbaceae or Syntrophaceae populations, and that the activity of Desulfobacteraceae increased further when the metabolism of dissimilatory metal reducers competing for the added acetate declined. In contrast, dsrB transcript abundance in Desulfobulbaceae and Syntrophaceae remained relatively constant, suggesting a lack of stimulation by added acetate. The indication of higher sulfate-reducing activity in the Desulfobacteraceae was consistent with the finding that Desulfobacteraceae became the predominant component of the sulfate-reducing community. Discontinuing acetate additions resulted in a decline in dsrB transcript abundance in the Desulfobacteraceae. These results suggest that monitoring transcripts of dissimilatory (bi)sulfite reductase genes in distinct populations of sulfate reducers can provide insight into the relative rates of metabolism of different components of the sulfate-reducing community and their ability to respond to environmental perturbations.

Miletto, M.; Williams, K.H.; N'Guessan, A.L.; Lovley, D.R.

2011-04-01T23:59:59.000Z

236

The Hirota Method for Reaction-Diffusion Equations with Three Distinct Roots  

SciTech Connect

The Hirota Method, with modified background is applied to construct exact analytical solutions of nonlinear reaction-diffusion equations of two types. The first equation has only nonlinear reaction part, while the second one has in addition the nonlinear transport term. For both cases, the reaction part has the form of the third order polynomial with three distinct roots. We found analytic one-soliton solutions and the relationships between three simple roots and the wave speed of the soliton. For the first case, if one of the roots is the mean value of other two roots, the soliton is static. We show that the restriction on three distinct roots to obtain moving soliton is removed in the second case by, adding nonlinear transport term to the first equation.

Tanoglu, Gamze; Pashaev, Oktay [Department of Mathematics, Izmir Institute of Technology, Gulbahce Campus, 35430, Urla, Izmir (Turkey)

2004-10-04T23:59:59.000Z

237

MPI-PhT/2003-28 Some results on distinction of Higgs boson models  

E-Print Network (OSTI)

MPI-PhT/2003-28 Some results on distinction of Higgs boson models #3; Jaume Guasch a , Wolfgang on the analysis of the ratio of branching ratios R = BR(H ! b #22; b)=BR(H ! #28; + #28; ) of Higgs boson decays and the e + e Linear Collider at 500 GeV center of mass energy. The search of a Higgs boson is nowadays

238

Homogeneity of Powassan virus populations in naturally infected Ixodes scapularis  

Science Conference Proceedings (OSTI)

Powassan virus (POWV, Flaviviridae: Flavivirus) is the sole North American member of the tick-borne encephalitis complex and consists of two distinct lineages that are maintained in ecologically discrete enzootic transmission cycles. The underlying genetic mechanisms that lead to niche partitioning in arboviruses are poorly understood. Therefore, intra- and interhost genetic diversity was analyzed to determine if POWV exists as a quasispecies in nature and quantify selective pressures within and between hosts. In contrast to previous reports for West Nile virus (WNV), significant intrahost genetic diversity was not observed. However, pN (0.238) and d{sub N}/d{sub S} ratios (0.092) for interhost diversity were similar to those of WNV. Combined, these data suggest that purifying selection and/or population bottlenecks constrain quasispecies diversity within ticks. These same selective and stochastic mechanisms appear to drive minor sequence changes between ticks. Moreover, Powassan virus populations seem not to be structured as quasispecies in naturally infected adult deer ticks.

Brackney, Doug E.; Brown, Ivy K.; Nofchissey, Robert A.; Fitzpatrick, Kelly A. [University of New Mexico School of Medicine, Department of Pathology, Albuquerque, New Mexico (United States); Ebel, Gregory D., E-mail: gebel@salud.unm.ed [University of New Mexico School of Medicine, Department of Pathology, Albuquerque, New Mexico (United States)

2010-07-05T23:59:59.000Z

239

Distinct p53 genomic binding patterns in normal and cancer-derived human cells  

Science Conference Proceedings (OSTI)

We report here genome-wide analysis of the tumor suppressor p53 binding sites in normal human cells. 743 high-confidence ChIP-seq peaks representing putative genomic binding sites were identified in normal IMR90 fibroblasts using a reference chromatin sample. More than 40% were located within 2 kb of a transcription start site (TSS), a distribution similar to that documented for individually studied, functional p53 binding sites and, to date, not observed by previous p53 genome-wide studies. Nearly half of the high-confidence binding sites in the IMR90 cells reside in CpG islands, in marked contrast to sites reported in cancer-derived cells. The distinct genomic features of the IMR90 binding sites do not reflect a distinct preference for specific sequences, since the de novo developed p53 motif based on our study is similar to those reported by genome-wide studies of cancer cells. More likely, the different chromatin landscape in normal, compared with cancer-derived cells, influences p53 binding via modulating availability of the sites. We compared the IMR90 ChIPseq peaks to the recently published IMR90 methylome1 and demonstrated that they are enriched at hypomethylated DNA. Our study represents the first genome-wide, de novo mapping of p53 binding sites in normal human cells and reveals that p53 binding sites reside in distinct genomic landscapes in normal and cancer-derived human cells.

Botcheva K.; McCorkle S. R.; McCombie W. R.; Dunn J. J.; Anderson C. W.

2011-12-15T23:59:59.000Z

240

An experimental study on the impact of network segmentation to the resilience of physical processes  

Science Conference Proceedings (OSTI)

The fact that modern Networked Industrial Control Systems (NICS) depend on Information and Communication Technologies (ICT) is well known. Although many studies have focused on the security of NICS, today we still lack a proper understanding of the impact ... Keywords: cyber-physical, network segmentation, resilience, security

Béla Genge; Christos Siaterlis

2012-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Joint Multi-Layer Segmentation and Reconstruction for Free-Viewpoint Video Applications  

Science Conference Proceedings (OSTI)

Current state-of-the-art image-based scene reconstruction techniques are capable of generating high-fidelity 3D models when used under controlled capture conditions. However, they are often inadequate when used in more challenging environments such as ... Keywords: Free-viewpoint video, Graph-cuts, Reconstruction, Segmentation

Jean-Yves Guillemaut; Adrian Hilton

2011-05-01T23:59:59.000Z

242

Targeting Products in Residential Markets: Comparing "Off-the-Shelf" and Custom Segmentation Systems  

Science Conference Proceedings (OSTI)

This report summarizes results of customer research designed to provide energy service companies that have an interest in selling value-added services with insight about selecting the best options among a variety of both "off-the-shelf" and custom segmentation tools.

2000-11-03T23:59:59.000Z

243

Breast MR segmentation and lesion detection with cellular neural networks and 3D template matching  

Science Conference Proceedings (OSTI)

A novel fully automated system is introduced to facilitate lesion detection in dynamic contrast-enhanced, magnetic resonance mammography (DCE-MRM). The system extracts breast regions from pre-contrast images using a cellular neural network, generates ... Keywords: 3D template matching, Cellular neural network, Lesion detection, MR mammography, Segmentation

Gökhan Erta?; H.Özcan Gülçür; Onur Osman; Osman N. Uçan; Mehtap Tunac?; Memduh Dursun

2008-01-01T23:59:59.000Z

244

The removal and segmentation of the Yankee Rowe reactor vessel internals  

Science Conference Proceedings (OSTI)

A major element of the reactor decommissioning of the Rowe Yankee reactor was the segmentation and packaging of the reactor internals. PCI Energy Services, specializing in remote cutting, machining, and welding, performed this work under contract to Yankee Atomic Electric Company. Removal techniques are described.

Child, C.; McGough, M.; Smith, G. [Power Cutting Inc., Lake Bluff, IL (United States)

1995-12-31T23:59:59.000Z

245

An adaptive algorithm for online time series segmentation with error bound guarantee  

Science Conference Proceedings (OSTI)

The volume of time series data grows rapidly in various applications such as network traffic management, telecommunications, finance and sensor network. To reduce the cost of storage, transmission and processing of time series data, the need for more ... Keywords: approximation, segmentation, time series

Zhenghua Xu; Rui Zhang; Ramamohanarao Kotagiri; Udaya Parampalli

2012-03-01T23:59:59.000Z

246

The Left and Right Context of a Word: Overlapping Chinese Syllable Word Segmentation with Minimal Context  

Science Conference Proceedings (OSTI)

Since a Chinese syllable can correspond to many characters (homophones), the syllable-to-character conversion task is quite challenging for Chinese phonetic input methods (CPIM). There are usually two stages in a CPIM: 1. segment the syllable sequence ... Keywords: Chinese phonetic input methods, syllable-to-word conversion

Mike Tian-Jian Jiang; Tsung-Hsien Lee; Wen-Lian Hsu

2013-03-01T23:59:59.000Z

247

A Finite Mixture Logit Model to Segment and Predict Electronic Payments System Adoption  

Science Conference Proceedings (OSTI)

Despite much hype about electronic payments systems (EPSs), a 2004 survey establishes that close to 80% of between-business payments are still made using paper-based formats. We present a finite mixture logit model to predict likelihood of EPS adoption ... Keywords: clustering analysis, electronic payments systems, finite mixture model, hierarchical logit regression, logistic regression, market segmentation

Ravi Bapna; Paulo Goes; Kwok Kee Wei; Zhongju Zhang

2011-03-01T23:59:59.000Z

248

Reality-based 3D modeling, segmentation and web-based visualization  

Science Conference Proceedings (OSTI)

One of the most significant consequences of the introduction of digital 3D modeling in the Cultural Heritage field is the possibility to use 3D models as highly effective and intuitive means of communication as well as interface to share and visualize ... Keywords: 3D modeling, laser scanning, photogrammetry, segmentation, semantic, web-based visualization

Anna Maria Manferdini; Fabio Remondino

2010-11-01T23:59:59.000Z

249

Segmenting images with gradient-based edge detection using Membrane Computing  

Science Conference Proceedings (OSTI)

In this paper, we present a parallel implementation of a new algorithm for segmenting images with gradient-based edge detection by using techniques from Natural Computing. This bio-inspired parallel algorithm has been implemented in a novel device architecture ... Keywords: CUDA, Edge detection, Membrane Computing, Sobel algorithm, Tissue P systems

Daniel DíAz-Pernil; Ainhoa Berciano; Francisco PeñA-Cantillana; Miguel A. GutiéRrez-Naranjo

2013-06-01T23:59:59.000Z

250

Intersecting Red and Blue Line Segments in Optimal Time and Precision  

Science Conference Proceedings (OSTI)

A common geometric problem in computer graphics and geographic information systems is to compute the arrangement of a set of n segments that can be colored red and blue so that there are no red/red or blue/blue crossings. We give a sweep algorithm ...

Andrea Mantler; Jack Snoeyink

2000-11-01T23:59:59.000Z

251

Shape prior model for media-adventitia border segmentation in IVUS using graph cut  

Science Conference Proceedings (OSTI)

We present a shape prior based graph cut method which does not require user initialisation. The shape prior is generalised from multiple training shapes, rather than using singular templates as priors. Weighted directed graph construction is used to ... Keywords: IVUS, graph cut, image segmentation, shape prior

Ehab Essa; Xianghua Xie; Igor Sazonov; Perumal Nithiarasu; Dave Smith

2012-10-01T23:59:59.000Z

252

Equipment PHM using non-stationary segmental hidden semi-Markov model  

Science Conference Proceedings (OSTI)

Health monitoring and prognostics of equipment is a basic requirement for condition-based maintenance (CBM) in many application domains where safety, reliability, and availability of the systems are considered mission critical. As a key complement to ... Keywords: Aging factor, Hazard rate, Non-stationary segmental hidden semi-Markov model, PHM, Remaining useful life

Ming Dong; Ying Peng

2011-06-01T23:59:59.000Z

253

Optimization of scale and parametrization for terrain segmentation: An application to soil-landscape modeling  

Science Conference Proceedings (OSTI)

This paper presents a procedure to optimize parametrization and scale for terrain-based environmental modeling. The workflow was exemplified on crop yield data, which is assumed to represent a proxy for soil productivity. Focal mean statistics were used ... Keywords: Curvature, Focal mean statistics, OBIA, Regression, Soil productivity., Terrain segmentation

Lucian Drgu; Thomas Schauppenlehner; Andreas Muhar; Josef Strobl; Thomas Blaschke

2009-09-01T23:59:59.000Z

254

Normalized cut segmentation of thyroid tumor image based on fractional derivatives  

Science Conference Proceedings (OSTI)

In the clinical diagnosis of thyroid tumor, ultrasound image may provide anatomical detail of the tumor, and radionuclide image may provide functional information about activity distribution of the tumor. Fusion of the two-modality medical image doesn't ... Keywords: fractional derivatives, image segmentation, normalized cut, thyroid tumor image

Jie Zhao; Li Zhang; Wei Zheng; Hua Tian; Dong-mei Hao; Song-hong Wu

2012-04-01T23:59:59.000Z

255

Colour vision model-based approach for segmentation of traffic signs  

Science Conference Proceedings (OSTI)

This paper presents a new approach to segment traffic signs from the rest of a scene via CIECAM, a colour appearance model. This approach not only takes CIECAM into practical application for the first time since it was standardised in 1998, but also ...

Xiaohong Gao; Kunbin Hong; Peter Passmore; Lubov Podladchikova; Dmitry Shaposhnikov

2008-01-01T23:59:59.000Z

256

Automated Tracing and Segmentation Tool for Migrating Neurons in 4D Confocal Imagery  

Science Conference Proceedings (OSTI)

Accurate tracing and segmentation of subcellular components of migrating neurons in confocal image sequences are prerequisite steps in many neurobiology studies to understand the biological machinery behind the movement of developing neurons. In this paper, we present an automated tracking, tracing, and segmentation tool for soma, leading, and trailing process of migrating neurons in time-lapse image stacks acquired with a confocal fluorescence microscope. In our approach, we first localize each neuron in the maximum intensity projection of the first frame using manual labeling of the soma and end points of the leading and trailing process. By using each soma position at the first frame, we automatically track the somas in rest of the frames. Then, leading and trailing process are traced in each frame from the soma center to the labeled end tip of the process by using fast marching algorithm. Finally, the soma, leading and trailing processes of each neuron are segmented by using the soma center and traces as seed points, and their boundaries are separated from each other. Based on qualitative results, we demonstrate the capability to automatically track, trace, and segment the soma, leading, and trailing processes of a migrating neuron with minimal user input.

Karakaya, Mahmut [ORNL; Kerekes, Ryan A [ORNL; Solecki, Dr. David [St. Jude Children's Research Hospital

2013-01-01T23:59:59.000Z

257

A hypergraph reduction algorithm for joint segmentation and classification of satellite image content  

Science Conference Proceedings (OSTI)

In this paper, we introduce a novel hypergraph reduction algorithm, and we evaluate it in an innovative method for joint segmentation and classification of satellite image content. It operates in 3 steps. First, we compute an Image Neighborhood Hypergraph ... Keywords: hypergraph, hypergraph reduction, satellite image, superpixel, supervised classification

Alain Bretto; Aurélien Ducournau; Soufiane Rital

2010-11-01T23:59:59.000Z

258

A quality analysis on JPEG 2000 compressed leukocyte images by means of segmentation algorithms  

Science Conference Proceedings (OSTI)

Reducing image file size by means of lossy compression algorithms can lead to distortions inimage contentaffectingdetection of fine detail structures, either by human orautomated observation. In the case of microscopic images of blood cells, which usually ... Keywords: JPEG 2000, compression, leukocytes, microscopicimages, segmentation

Alexander Falcón-Ruiz; Juan Paz-Viera; Alberto Taboada-Crispí; Hichem Sahli

2010-11-01T23:59:59.000Z

259

Railroad impact study: 63 rail-line segments in South Dakota. Appendices  

SciTech Connect

The appendices are incorporated in a separate volume for ease of handling. The tables and data will be of value to those who may want to conduct more in-depth analyses. The appendices contain detailed information on the entire state of South Dakota and on the 63 rail line segments.

Poth, L.A.; Peterson, J.

1977-12-01T23:59:59.000Z

260

A nonlinear elastic deformable template for soft structure segmentation. Application to the heart  

E-Print Network (OSTI)

A nonlinear elastic deformable template for soft structure segmentation. Application to the heart of the heart's anatomy and motion from temporal image sequences, more precisely Magnetic Resonance Imaging (MRI) sequences. Currently, a clinical examination results in a stack of slices covering the whole heart

Rouchdy, Youssef

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

The Finite Segment Method for Recursive Approach to Flexible Multibody Dynamics  

Science Conference Proceedings (OSTI)

In this paper we study the dynamics and kinematics of serial flexible link manipulators using the finite segment method. In our analysis the flexible manipulators are divided into a set of rigid bodies coupled with springs and dampers. The dynamic equations ...

Hongli Sun; Hongtao Wu; Bing Shao; Fuyang Tian

2009-05-01T23:59:59.000Z

262

Detection and characterization of flaws in segments of light water reactor pressure vessels  

Science Conference Proceedings (OSTI)

Studies have been conducted to determine flaw density in segments cut from light water reactor (LWR) pressure vessels as part of the Oak Ridge National Laboratory's Heavy-Section Steel Technology (HSST) Program. Segments from the Hope Creek Unit 2 vessil and the Pilgrim Unit 2 Vessel were purchased from salvage dealers. Hope Creek was a boiling water reactor (BWR) design and Pilgrim was a pressurized water reactor (PWR) design. Neither were ever placed in service. Objectives were to evaluate these LWR segments for flaws with ultrasonic and liquid penetrant techniques. Both objectives were successfully completed. One significant indication was detected in a Hope Creek seam weld by ultrasonic techniques and characterized by further analyses terminating with destructive correlation. This indication (with a through-wall dimension of approx.6 mm (approx.0.24 in.)) was detected in only 3 m (10 ft) of weldment and offers extremely limited data when compared to the extent of welding even in a single pressure vessel. However, the detection and confirmation of the flaw in the arbitrarily selected sections implies the Marshall report estimates (and others) are nonconservative for such small flaws. No significant indications were detected in the Pilgrim material by ultrasonic techniques. Unfortunately, the Pilgrim segments contained relatively little weldment; thus, we limited our ultrasonic examinations to the cladding and subcladding regions. Fluorescent liquid penetrant inspection of the cladding surfaces for both LWR segments detected no significant indications (i.e., for a total of approximately 6.8 m/sup 2/ (72 ft/sup 2/) of cladding surface).

Cook, K.V.; Cunningham, R.A. Jr.; McClung, R.W.

1987-01-01T23:59:59.000Z

263

Multiband segmentation of a spectroscopic line data cube: application to the HI data cube of the spiral galaxy NGC 4254  

Science Conference Proceedings (OSTI)

A new method for the multiband segmentation of a spectroscopic line data cube is presented. This method is intended to help astronomers to handle complex spectroscopic line data cubes where the inspection of the channel and moment maps is difficult. ... Keywords: Bayesian segmentation, Gaussian mixture model, HI 21 cm line spiral galaxy NGC 4254, hierarchical hidden Markov model, multicomponent image, spectroscopic data cube reduction

Farid Flitti; Christophe Collet; Bernd Vollmer; François Bonnarel

2005-01-01T23:59:59.000Z

264

An intelligent modified fuzzy c-means based algorithm for bias estimation and segmentation of brain MRI  

Science Conference Proceedings (OSTI)

The segmentation of magnetic resonance images (MRI) is a challenging problem that has received an enormous amount of attention lately. Many researchers have applied various techniques however fuzzy c-means (FCM) based algorithms have produced better ... Keywords: FCM, MRI, Medical image processing, Segmentation

M. Y. Siyal; Lin Yu

2005-10-01T23:59:59.000Z

265

Cortical dynamics of navigation and steering in natural scenes: Motion-based object segmentation, heading, and obstacle avoidance  

Science Conference Proceedings (OSTI)

Visually guided navigation through a cluttered natural scene is a challenging problem that animals and humans accomplish with ease. The ViSTARS neural model proposes how primates use motion information to segment objects and determine heading for purposes ... Keywords: MST, MT, Motion segmentation, Navigation, Object tracking, Optic flow, Steering

N. Andrew Browning; Stephen Grossberg; Ennio Mingolla

2009-12-01T23:59:59.000Z

266

Transport Energy Use and Population Density  

NLE Websites -- All DOE Office Websites (Extended Search)

Transport Energy Use and Population Density Transport Energy Use and Population Density Speaker(s): Masayoshi Tanishita Date: July 1, 2004 - 10:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Jonathan Sinton After Peter Newman and Jeffrey Kenworthy published "Cities and Automobile Dependence" in 1989, population density was brought to public attention as an important factor to explain transport mobility and energy use. However, several related issues still remain open: Is an increase in population density more effective than rising gas prices in reducing transport energy use? How much does per capita transport energy use change as population density in cities changes? And what kind of factors influence changes in population density? In this presentation, using city-level data in the US, Japan and other countries, the population-density elasticity of

267

Distinct local electronic structure and magnetism for Mn in amorphous Si and Ge  

SciTech Connect

Transition metals such as Mn generally have large local moments in covalent semiconductors due to their partially filled d shells. However, Mn magnetization in group-IV semiconductors is more complicated than often recognized. Here we report a striking crossover from a quenched Mn moment (<0.1 {mu}{sub B}) in amorphous Si (a-Si) to a large distinct local Mn moment ({ge}3{mu}{sub B}) in amorphous Ge (a-Ge) over a wide range of Mn concentrations (0.005-0.20). Corresponding differences are observed in d-shell electronic structure and the sign of the Hall effect. Density-functional-theory calculations show distinct local structures, consistent with different atomic density measured for a-Si and a-Ge, respectively, and the Mn coordination number N{sub c} is found to be the key factor. Despite the amorphous structure, Mn in a-Si is in a relatively well-defined high coordination interstitial type site with broadened d bands, low moment, and electron (n-type) carriers, while Mn in a-Ge is in a low coordination substitutional type site with large local moment and holes (p-type) carriers. Moreover, the correlation between N{sub c} and the magnitude of the local moment is essentially independent of the matrix; the local Mn moments approach zero when N{sub c} > 7 for both a-Si and a-Ge.

Zeng, Li; Cao, J. X.; Helgren, E.; Karel, J.; Arenholz, E.; Ouyang, Lu; Smith, David J.; Wu, R. Q.; Hellman, F.

2010-06-01T23:59:59.000Z

268

Supernova rates and stellar populations  

E-Print Network (OSTI)

We discuss the results about the nature of type Ia Supernovae that can be derived by studying their rates in different stellar populations. While the evolution of SN photometry and spectra can constrain the explosion mechanism, the SN rate depends on the progenitor system. We review the current available data on rates as a function of parent galaxy color, morphology, star formation rate, radio luminosity and environment. By studying the variation of the rates with the color of the parent galaxy, a strong evidence was established that type Ia SNe come from both young and old stars. The dependence of the rates with the radio power of the parent galaxy is best reproduced by a bimodal distribution of delay time between the formation of the progenitor and its explosion as a SN. Cluster early-type galaxies show higher type Ia SN rate with respect to field galaxies, and this effect can be due either to traces of young stars or to differences in the delay time distribution.

F. Mannucci

2007-08-03T23:59:59.000Z

269

An Inverter Packaging Scheme for an Integrated Segmented Traction Drive System  

Science Conference Proceedings (OSTI)

The standard voltage source inverter (VSI), widely used in electric vehicle/hybrid electric vehicle (EV/HEV) traction drives, requires a bulky dc bus capacitor to absorb the large switching ripple currents and prevent them from shortening the battery s life. The dc bus capacitor presents a significant barrier to meeting inverter cost, volume, and weight requirements for mass production of affordable EVs/HEVs. The large ripple currents become even more problematic for the film capacitors (the capacitor technology of choice for EVs/HEVs) in high temperature environments as their ripple current handling capability decreases rapidly with rising temperatures. It is shown in previous work that segmenting the VSI based traction drive system can significantly decrease the ripple currents and thus the size of the dc bus capacitor. This paper presents an integrated packaging scheme to reduce the system cost of a segmented traction drive.

Su, Gui-Jia [ORNL; Tang, Lixin [ORNL; Ayers, Curtis William [ORNL; Wiles, Randy H [ORNL

2013-01-01T23:59:59.000Z

270

Apparatus and methods for impingement cooling of a side wall of a turbine nozzle segment  

SciTech Connect

A gas turbine nozzle segment has outer and inner bands and a vane therebetween. Each band includes a nozzle wall, a side wall, a cover and an impingement plate between the cover and the nozzle wall defining two cavities on opposite sides of the impingement plate. Cooling steam is supplied to one cavity for flow through apertures of the impingement plate to cool the nozzle wall. The side wall of the band and inturned flange define with the nozzle wall an undercut region. The impingement plate has a turned flange welded to the inturned flange. A backing plate overlies the turned flange and aligned apertures are formed through the backing plate and turned flange to direct and focus cooling flow onto the side wall of the nozzle segment.

Burdgick, Steven Sebastian (Schenectady, NY)

2002-01-01T23:59:59.000Z

271

Support pedestals for interconnecting a cover and nozzle band wall in a gas turbine nozzle segment  

DOE Patents (OSTI)

A gas turbine nozzle segment has outer and inner band portions. Each band portion includes a nozzle wall, a cover and an impingement plate between the cover and nozzle wall defining two cavities on opposite sides of the impingement plate. Cooling steam is supplied to one cavity for flow through the apertures of the impingement plate to cool the nozzle wall. Structural pedestals interconnect the cover and nozzle wall and pass through holes in the impingement plate to reduce localized stress otherwise resulting from a difference in pressure within the chamber of the nozzle segment and the hot gas path and the fixed turbine casing surrounding the nozzle stage. The pedestals may be cast or welded to the cover and nozzle wall.

Yu, Yufeng Phillip (Simpsonville, SC); Itzel, Gary Michael (Simpsonville, SC); Webbon, Waylon Willard (Greenville, SC); Bagepalli, Radhakrishna (Schenectady, NY); Burdgick, Steven Sebastian (Schenectady, NY); Kellock, Iain Robertson (Simpsonville, SC)

2002-01-01T23:59:59.000Z

272

Image sequence coding using multiple-level segmentation and affine motion estimation  

E-Print Network (OSTI)

Abstract—A very low bit-rate video codec using multiple-level segmentation and affine motion compensation is presented. The translational motion model is adequate to motion compensate small regions even when complex motion is involved; however, it is no longer capable of delivering satisfactory results when applied to large regions or the whole frame. The proposed codec is based on a variable block size algorithm enhanced with global motion compensation, inner block segmentation, and a set of motion models used adaptively in motion compensation. The experimental results show that the proposed method gives better results in terms of the bit rate under the same PSNR constraint for most of the tested sequences as compared with the fixed block size approach and traditional variable block size codec in which only translational motion compensation is utilized. Index Terms — Codecs, data compression, motion compensation, video coding. I.

Kui Zhang; Miros?aw Bober; Associate Member; Josef Kittler

1997-01-01T23:59:59.000Z

273

Development and analysis of a linearly segmented CPC collector for industrial steam generation  

DOE Green Energy (OSTI)

This study involves the design, analysis and construction of a modular, non-imaging, trough, concentrating solar collector for generation of process steam in a tropical climate. The most innovative feature of this concentrator is that the mirror surface consists of long and narrow planar segments placed inside sealed low-cost glass tubes. The absorber is a cylindrical fin inside an evacuated glass tube. As an extension of the same study, the optical efficiency of the segmented concentrator has been simulated by means of a Monte-Carlo Ray-Tracing program. Laser Ray-Tracing techniques were also used to evaluate the possibilities of this new concept. A preliminary evaluation of the experimental concentrator was done using a relatively simple method that combines results from two experimental measurements: overall heat loss coefficient and optical efficiency. A transient behaviour test was used to measure the overall heat loss coefficient throughout a wide range of temperatures.

Figueroa, J.A.A.

1980-06-01T23:59:59.000Z

274

Nuclear Star Clusters - Structure and Stellar Populations  

E-Print Network (OSTI)

This is an overview of nuclear star cluster observations, covering their structure, stellar populations, kinematics and possible connection to black holes at the centers of galaxies.

Neumayer, Nadine

2012-01-01T23:59:59.000Z

275

Four Most Populous States - Energy Information Administration  

U.S. Energy Information Administration (EIA)

RESIDENTIAL ENERGY CONSUMPTION SURVEY 1997. OVERVIEW: MOST POPULOUS STATES ... Homes with air-conditioning: 62%... with a central air-conditioning system: 18%

276

Optimal control of leukemic cell population dynamics  

E-Print Network (OSTI)

Sep 5, 2013 ... This issue can be formulated as an optimal control problem. The dynamics of leukemic cell populations in culture is given by age-structured ...

277

Parameter selection for suppressed fuzzy c-means with an application to MRI segmentation  

Science Conference Proceedings (OSTI)

This paper presents an algorithm, called the modified suppressed fuzzy c-means (MS-FCM), that simultaneously performs clustering and parameter selection for the suppressed fuzzy c-means (S-FCM) algorithm proposed by [Fan, J.L., Zhen, W.Z., Xie, W.X., ... Keywords: Fuzzy c-means, Fuzzy clustering, Magnetic resonance image segmentation, Parameter selection, Suppressed fuzzy c-means

Wen-Liang Hung; Miin-Shen Yang; De-Hua Chen

2006-04-01T23:59:59.000Z

278

Method of joining a vane cavity insert to a nozzle segment of a gas turbine  

SciTech Connect

An insert containing apertures for impingement cooling a nozzle vane of a nozzle segment in a gas turbine is inserted into one end of the vane. The leading end of the insert is positioned slightly past a rib adjacent the opposite end of the vane through which the insert is inserted. The end of the insert is formed or swaged into conformance with the inner margin of the rib. The insert is then brazed or welded to the rib.

Burdgick, Steven Sebastian (Schenectady, NY)

2002-01-01T23:59:59.000Z

279

Detection and characterization of indications in segments of reactor pressure vessels  

Science Conference Proceedings (OSTI)

Studies have been conducted to estimate flaw density in segments cut from light water reactor (LWR) pressure vessels as part of the Oak Ridge National Laboratory's Heavy-Section Steel Technology (HSST) Program. Segments from the Hope Creek Unit 2 vessel and the Pilgrim Unit 2 vessel were purchased from salvage dealers. Hope Creek was a boiling water reactor (BWR) design and Pilgrim was a pressurized water reactor (PWR) design. Neither were ever placed in service. Objectives were to evaluate these LWR segments for flaws with ultrasonic and liquid penetrant techniques and to compare the results with current assumptions related to probabilistic risk assessment. Both objectives were successfully completed. Ultrasonic techniques beyond those required by the 1986 edition of the ASME Boiler and Pressure Vessel Code were necessary for the detection and reporting of the detected discontinuities. Extra care and analysis must be exercised when conducting ultrasonic examination through cladding. The detection of the discontinuities in the arbitrarily selected sections implies that the Marshall report estimates (and others) are nonconservative for such small flaws. 8 refs., 9 figs.

Cook, K.V.; Cunningham, R.A. Jr.; McClung, R.W.

1989-08-01T23:59:59.000Z

280

Simultaneous hierarchical segmentation and vectorization of satellite images through combined data sampling and anisotropic triangulation  

SciTech Connect

The automatic detection, recognition , and segmentation of object classes in remote sensed images is of crucial importance for scene interpretation and understanding. However, it is a difficult task because of the high variability of satellite data. Indeed, the observed scenes usually exhibit a high degree of complexity, where complexity refers to the large variety of pictorial representations of objects with the same semantic meaning and also to the extensive amount of available det.ails. Therefore, there is still a strong demand for robust techniques for automatic information extraction and interpretation of satellite images. In parallel, there is a growing interest in techniques that can extract vector features directly from such imagery. In this paper, we investigate the problem of automatic hierarchical segmentation and vectorization of multispectral satellite images. We propose a new algorithm composed of the following steps: (i) a non-uniform sampling scheme extracting most salient pixels in the image, (ii) an anisotropic triangulation constrained by the sampled pixels taking into account both strength and directionality of local structures present in the image, (iii) a polygonal grouping scheme merging, through techniques based on perceptual information , the obtained segments to a smaller quantity of superior vectorial objects. Besides its computational efficiency, this approach provides a meaningful polygonal representation for subsequent image analysis and/or interpretation.

Grazzini, Jacopo [Los Alamos National Laboratory; Prasad, Lakshman [Los Alamos National Laboratory; Dillard, Scott [PNNL

2010-10-21T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Transport of ions in a segmented linear Paul trap in printed-circuit-board technology  

E-Print Network (OSTI)

We describe the construction and operation of a segmented linear Paul trap, fabricated in printed-circuit-board technology with an electrode segment width of 500 microns. We prove the applicability of this technology to reliable ion trapping and report the observation of Doppler cooled ion crystals of Ca-40 with this kind of traps. Measured trap frequencies agree with numerical simulations at the level of a few percent from which we infer a high fabrication accuracy of the segmented trap. To demonstrate its usefulness and versatility for trapped ion experiments we study the fast transport of a single ion. Our experimental results show a success rate of 99.0(1)% for a transport distance of 2x2mm in a round-trip time of T=20us, which corresponds to 4 axial oscillations only. We theoretically and experimentally investigate the excitation of oscillations caused by fast ion transports with error-function voltage ramps: For a slightly slower transport (a round-trip shuttle within T=30us) we observe non-adiabatic motional excitation of 0.89(15)meV.

G. Huber; T. Deuschle; W. Schnitzler; R. Reichle; K. Singer; F. Schmidt-Kaler

2007-11-19T23:59:59.000Z

282

Imagine a list of American innovations that would convey some sense of our nation's distinctiveness in the world. Depending on  

E-Print Network (OSTI)

's distinctiveness in the world. Depending on the list-maker's mood, it might include the atom bomb, jazz the week U.S. News & World Report comes out with its annual college rankings IntroductIon Copyrighted

Landweber, Laura

283

SOX2 Co-Occupies Distal Enhancer Elements with Distinct POU Factors in ESCs and NPCs to Specify Cell State  

E-Print Network (OSTI)

SOX2 is a master regulator of both pluripotent embryonic stem cells (ESCs) and multipotent neural progenitor cells (NPCs); however, we currently lack a detailed understanding of how SOX2 controls these distinct stem cell ...

Lodato, Michael A.

284

EVIDENCE FOR TWO DISTINCT MORPHOLOGICAL CLASSES OF GAMMA-RAY BURSTS FROM THEIR SHORT TIMESCALE VARIABILITY  

E-Print Network (OSTI)

We have analyzed the 241 bursts for which peak counts (C)max exist in the publicly available Burst and Transient Source Experiment (BATSE) catalog. Introducing peak counts in 1024 ms as a measure of burst brightness B and the ratio of peak counts in 64 and 1024 ms as a measure of short timescale variability V, we find a statistically significant correlation between the brightness and the short timescale variability of ?-ray bursts. The bursts which are smoother on short timescales are both faint and bright, while the bursts which are variable on short timescales are faint only, suggesting the existence of two distinct morphological classes of bursts. Subject headings: gamma-rays: bursts 1

D. Q. Lamb; C. Graziani; I. A. Smith

1993-01-01T23:59:59.000Z

285

Edge preserving smoothing and segmentation of 4-D images via transversely isotropic scale-space processing and fingerprint analysis  

E-Print Network (OSTI)

Scale-space derived from B-splines,” IEEE Trans. Patt. Anal.segmentation and temporal B-splines,” IEEE Trans. Med. Imag.based on the uniform cubic B-spline basis function. 12–14

Reutter, Bryan W.; Algazi, V. Ralph; Gullberg, Grant T; Huesman, Ronald H.

2004-01-01T23:59:59.000Z

286

A method for identification and classification of medicinal plant images based on level set segmentation and SVM classification  

Science Conference Proceedings (OSTI)

This paper presents a methodology for identification and classification of images of the medicinal plants based on level set segmentation. The medicinal plants are identified using structural features, namely, height, shape, size of leafy part, flowers, ...

Suvarna S. Nandyal; Basavaraj S. Anami; A. Govardhan; P. S. Hiremath

2012-04-01T23:59:59.000Z

287

Identifying patients in target customer segments using a two-stage clustering-classification approach: A hospital-based assessment  

Science Conference Proceedings (OSTI)

Identifying patients in a Target Customer Segment (TCS) is important to determine the demand for, and to appropriately allocate resources for, health care services. The purpose of this study is to propose a two-stage clustering-classification model through ... Keywords: Customer relationship management (CRM), K-means clustering algorithm, Recency-Frequency-Monetary (RFM) analysis model, Rough set theory (RST), Target customer segment (TCS)

You-Shyang Chen; Ching-Hsue Cheng; Chien-Jung Lai; Cheng-Yi Hsu; Han-Jhou Syu

2012-02-01T23:59:59.000Z

288

The Effect of Environmental Contaminants on Mating Dynamics and Population Viability in a Sex-Role-Reversed Pipefish  

E-Print Network (OSTI)

Understanding how anthropogenic activity impacts the health and viability of wildlife populations is one of the most important tasks of environmental biology. A key concern related to bi-products of human activity is the accumulation of environmental pollutants within aquatic environments. Pollutants such as endocrine disruptors and heavy metals have the potential to impact both human and wildlife populations in contaminated areas. While much research has focused on how these compounds impact natural selection processes, such as viability and reproduction, their effect on sexual selection processes is not as clear. The goal of this dissertation was to address how environmental contaminants impact sexual selection processes in a sex-role reversed pipefish and evaluate how these effects may impact long-term population viability. Here we show that short periods of exposure to environmentally relevant concentrations of a synthetic estrogen result in male pipefish with female-like secondary sexual traits. While these males are capable of reproduction, exposed males are discriminated against by females in mate choice tests. In natural populations, this type of discrimination could reduce male mating opportunities, potentially reducing their reproductive success. In an additional component of this dissertation, it was discovered that pipefish populations around Mobile Bay, specifically Weeks Bay, are currently being exposed to significantly elevated levels of mercury. These populations are genetically distinct from coastal populations but moderate levels of gene flow occur among sites, and gene flow between contaminated and non-contaminated population may be influencing how environmental contaminants are impacting genetic diversity and population viability. In the case of endocrine disruptors, migration between contaminated and non-contaminated sites may negatively impact population viability. Morphological traits induced with exposure to contaminants may be maintained for extended periods of time, therefore, the effect the exposed phenotype has on mating dynamics and sexual selection could be carried to non-contaminated sites if exposed individuals move to new populations. On the other hand, immigration of individuals from non-contaminated sites into contaminated areas may help maintain genetic diversity within exposed populations. In conclusion, the work presented in this dissertation shows that the presence of environmental toxins can significantly impact sexual selection processes, which in turn can have profound effects on the viability and future evolutionary trajectory of populations. Future work in this area should not only address how these toxins impact individual fitness, but should also address how population structure may be influencing the severity of these compounds on natural populations.

Partridge, Charlyn G.

2009-12-01T23:59:59.000Z

289

Energy Systems and Population Health  

Science Conference Proceedings (OSTI)

It is well-documented that energy and energy systems have a central role in social and economic development and human welfare at all scales, from household and community to regional and national (41). Among its various welfare effects, energy is closely linked with people s health. Some of the effects of energy on health and welfare are direct. With abundant energy, more food or more frequent meals can be prepared; food can be refrigerated, increasing the types of food items that are consumed and reducing food contamination; water pumps can provide more water and eliminate the need for water storage leading to contamination or increased exposure to disease vectors such as mosquitoes or snails; water can be disinfected by boiling or using other technologies such as radiation. Other effects of energy on public health are mediated through more proximal determinants of health and disease. Abundant energy can lead to increased irrigation, agricultural productivity, and access to food and nutrition; access to energy can also increase small-scale income generation such as processing of agricultural commodities (e.g., producing refined oil from oil seeds, roasting coffee, drying and preserving fruits and meats) and production of crafts; ability to control lighting and heating allows education or economic activities to be shielded from daily or seasonal environmental constraints such as light, temperature, rainfall, or wind; time and other economic resources spent on collecting and/or transporting fuels can be used for other household needs if access to energy is facilitated; energy availability for transportation increases access to health and education facilities and allow increased economic activity by facilitating the transportation of goods and services to and from markets; energy for telecommunication technology (radio, television, telephone, or internet) provides increased access to information useful for health, education, or economic purposes; provision of energy to rural and urban health facilities allows increased delivery and coverage of 3 various health services and interventions such as tests and treatments, better storage of medicine and vaccines, disinfection of medical equipment by boiling or radiation, and more frequent and efficient health system encounters through mobile clinics or longer working hours; and so on. In fact, while the dominant view of development-energy-health linkages has been that improvements in energy and health are outcomes of the socioeconomic development process (e.g., the ''energy ladder'' framework discussed below), it has even been argued that access to higher quality energy sources and technologies can initiate a chain of demographic, health, and development outcomes by changing the household structure and socioeconomic relationships. For example, in addition to increased opportunities for food and income production, reduced infant mortality as a result of transition to cleaner fuels or increased coverage of vaccination with availability of refrigerators in rural clinics may initiate a process of ''demographic transition'' to low-mortality and low-fertility populations (14). Such a transition has historically been followed with further improvements in maternal and child health and increased female participation in the labor markets and other economic activities.

Ezzati, Majid; Bailis, Rob; Kammen, Daniel M.; Holloway, Tracey; Price, Lynn; Cifuentes, Luis A.; Barnes, Brendon; Chaurey, Akanksha; Dhanapala, Kiran N.

2004-04-12T23:59:59.000Z

290

A population study of golden eagles in the Altamont Pass Wind Resource area. Second-year progress report  

Science Conference Proceedings (OSTI)

Since January 1994, the Predatory Bird Research Group, University of California, Santa Cruz, has been conducting a field investigation of the ecology of golden eagles (Aquila chrysaetos) in the vicinity of the Altamont Pass Wind Resource Area (WRA). The 190 km{sup 2} facility lies just east of San Francisco Bay in California and contains about 6,500 wind turbines. Grassland and oak savanna habitats surrounding the WRA support a substantial resident population of golden eagles. Each year, the U.S. Fish and Wildlife Service receivers reports from the wind industry of about 30 golden eagle casualties occurring at the WRA, and it is probable that many more carcasses go unnoticed. Over 90 percent of the casualties are attributed to collisions with wind turbines. The main purpose of this study is to estimate the effect of turbine-related mortality on the golden eagle population of the area. Assessing the impact of the WRA kills on the population requires quantification of both survival and reproduction. To estimate survival rates of both territorial and non-territorial golden eagles, we tagged 179 individuals with radio-telemetry transmitters expected to function for about four years and equipped with mortality sensors. Population segments represented in the tagged sample include 79 juveniles, 45 subadults, 17n floaters (non-territorial adults), and 38 breeders. Effective sample sizes in the older segments increase as younger eagles mature or become territorial. Since the beginning of the study, we have conducted weekly roll-call surveys by airplane to locate the tagged eagles in relation to the WRA and to monitor their survival. The surveyed area extends from the Oakland Hills southeast through the Diablo Mountain Range to San Luis Reservoir about 75 km southeast of the WRA. The surveys show that breeding eagles rarely enter the WRA while the non-territorial eagles tend to move about freely throughout the study area and often visit the WRA.

NONE

1997-07-01T23:59:59.000Z

291

Estimating Traveler Populations at Airport and Cruise Terminals for Population Distribution and Dynamics  

Science Conference Proceedings (OSTI)

In recent years, uses of high-resolution population distribution databases are increasing steadily for environmental, socioeconomic, public health, and disaster-related research and operations. With the development of daytime population distribution, temporal resolution of such databases has been improved. However, the lack of incorporation of transitional population, namely business and leisure travelers, leaves a significant population unaccounted for within the critical infrastructure networks, such as at transportation hubs. This paper presents two general methodologies for estimating passenger populations in airport and cruise port terminals at a high temporal resolution which can be incorporated into existing population distribution models. The methodologies are geographically scalable and are based on, and demonstrate how, two different transportation hubs with disparate temporal population dynamics can be modeled utilizing publicly available databases including novel data sources of flight activity from the Internet which are updated in near-real time. The airport population estimation model shows great potential for rapid implementation for a large collection of airports on a national scale, and the results suggest reasonable accuracy in the estimated passenger traffic. By incorporating population dynamics at high temporal resolutions into population distribution models, we hope to improve the estimates of populations exposed to or at risk to disasters, thereby improving emergency planning and response, and leading to more informed policy decisions.

Jochem, Warren C [ORNL; Sims, Kelly M [ORNL; Bright, Eddie A [ORNL; Urban, Marie L [ORNL; Rose, Amy N [ORNL; Coleman, Phil R [ORNL; Bhaduri, Budhendra L [ORNL

2013-01-01T23:59:59.000Z

292

Hanford Site Regional Population - 2010 Census  

Science Conference Proceedings (OSTI)

The U.S. Department of Energy conducts radiological operations in south-central Washington State. Population dose estimates must be performed to provide a measure of the impact from site radiological releases. Results of the U.S. 2010 Census were used to determine counts and distributions for the residential population located within 50-miles of several operating areas of the Hanford Site. Year 2010 was the first census year that a 50-mile population of a Hanford Site operational area exceeded the half-million mark.

Hamilton, Erin L.; Snyder, Sandra F.

2011-08-12T23:59:59.000Z

293

Two distinct phases of apoptosis in mammary gland involution: proteinase-independent and -dependent pathways  

SciTech Connect

Postlactational involution of the mammary gland is characterized by two distinct physiological events: apoptosis of the secretory, epithelial cells undergoing programmed cell death, and proteolytic degradation of the mammary gland basement membrane. We examined the spatial and temporal patterns of apoptotic cells in relation to those of proteinases during involution of the BALB/c mouse mammary gland. Apoptosis was almost absent during lactation but became evident at day 2 of involution, when {beta}-casein gene expression was still high. Apoptotic cells were then seen at least up to day 8 of involution, when {beta}-casein gene expression was being extinguished. Expression of sulfated glycoprotein-2 (SGP-2), interleukin-1{beta} converting enzyme (ICE) and tissue inhibitor of metalloproteinases-1 was upregulated at day 2, when apoptotic cells were seen initially. Expression of the matrix metalloproteinases gelatinase A and stromelysin-1 and the serine proteinase urokinase-type plasminogen activator, which was low during lactation, was strongly upregulated in parallel starting at day 4 after weaning, coinciding with start of the collapse of the lobulo-alveolar structures and the intensive tissue remodeling in involution. The major sites of mRNA synthesis for these proteinases were fibroblast-like cells in the periductal stroma and stromal cells surrounding the collapsed alveoli, suggesting that the degradative phase of involution is due to a specialized mesenchymal-epithelial interaction. To elucidate the functional role of these proteinases during involution, at the onset of weaning we treated mice systemically with the glucocorticoid hydrocortisone, which is known to inhibit mammary gland involution. Although the initial wave of apoptotic cells appeared in the lumina of the gland, the dramatic regression and tissue remodeling usually evident by day 5 was substantially inhibited by systemic treatment with hydrocortisone. mRNA and protein for gelatinase A, stromelysin-1 and uPA were weakly induced, if at all, in hydrocortisonetreated mice. Furthermore, mRNA for membrane-type matrix metalloproteinase decreased after hydrocortisone treatment and paralleled the almost complete inhibition of activation of latent gelatinase A. Concomitantly, the gland filled with an overabundance of milk. Our data support the hypothesis that there are at least two distinct phases of involution: an initial phase, characterized by induction of the apoptosis-associated genes SGP-2 and ICE and apoptosis of fully differentiated mammary epithelial cells without visible degradation of the extracellular matrix, and a second phase, characterized by extracellular matrix remodeling and altered mesenchymal-epithelial interactions, followed by apoptosis of cells that are losing differentiated functions.

Lund, Leif R; Romer, John; Thomasset, Nicole; Solberg, Helene; Pyke, Charles; Bissell, Mina J; Dano, Keld; Werb, Zena

1996-01-01T23:59:59.000Z

294

Segmented Ultralight Pre-Aligned Rotor for Extreme-Scale Wind Turbines  

SciTech Connect

To alleviate the mass-scaling issues associated with conventional upwind rotors of extreme-scale turbines, a downwind rotor concept is proposed which employs fixed blade curvature based on force alignment at rated conditions. For a given peak stress constraint, the reduction in downwind cantilever loads allows reduced shell and spar thickness, and thus a reduced blade mass as compared with a conventional upwind rotor, especially as rotor sizes approach extreme-scales. To quantify this mass reduction, a Finite Element Analysis was conducted for a 10 MW rated rotor based on the NREL offshore 5 MW baseline wind turbine. The results show that this 'pre-alignment' yields a net downstream deflection of 32 deg, a downward hub-pitch angle of 6 deg, a 20% increase in blade length (to maintain the same radius as the conventional blade), and a net mass savings of about 50% through decreased shell and spar thicknesses. The pre-alignment may also allow a more straightforward and efficient segmentation of the blade since shear stresses near joints are substantially reduced. Segmenting, in turn, can dramatically reduce costs associated with fabrication, transport and assembly for extreme-scale off-shore systems. The pre-aligned geometric curvature can also help alleviate tower wake effects on the blades since blade tips (where shadow effects can be most problematic) are shifted downstream where the tower wake is weaker. In addition, the portion of the tower that is upstream of the blade tips can be faired with an externally-rotating aerodynamic shroud. Furthermore, the downwind rotor can allow a floating off-shore tri-pod platform to reduce tower weight and yaw-control requirements. A simple economic analysis of the segmented ultralight pre-aligned rotor (SUPAR) concept suggests that the overall system cost savings can be as much as 25%, indicating that more detailed (numerical and experimental) investigations are warranted.

Loth, E.; Steele, A.; Ichter, B.; Selig, M.; Moriarty, P.

2012-01-01T23:59:59.000Z

295

Segmenting human-motion for mobile robot navigation using alignment errors  

E-Print Network (OSTI)

Abstract — This paper presents a new human-motion identification and segmentation algorithm, for mobile robot platforms. The algorithm is based on computing the alignment error between pairs of object images acquired from a moving platform. Pairs of images generating relatively small alignment errors are used to estimate the fundamental frequency of the object’s motion. A decision criterion is then used to test the significance of the estimated frequency and to classify the object’s motion. To verify the validity of the proposed approach, experimental results are shown on different classes of objects. I.

Wael Abd-almageed

2005-01-01T23:59:59.000Z

296

Layered and segmented system organization (LASSO) for highly reliable inventory monitoring systems (IMS)  

SciTech Connect

The Trilateral Initiative is preparing for International Atomic Energy Agency (LUiA) verification of excess fissile material released itom the defense programs of the United States and the Russian Federation. Following acceptance of the material using an Attribute Verification System, the IAEA will depend on an Inventory Monitoring System to maintain Continuity of Knowledge of the large inventory of thousands of items. Recovery fiom a total loss of Continuity of Knowledge in such a large storage facility would involve an extremely costly inventory re-verification This paper presents the framework for a Layered and Segmented System Organization that is the basis for a highly reliable IMS with protection-in-depth.

Mangan, Dennis L.; Matter, John C.; Waddoups, I. (Ivan); Abhold, M. E. (Mark E.); Chiaro, P. (Peter)

2002-01-01T23:59:59.000Z

297

TCP over low-power and lossy networks: tuning the segment size to minimize energy consumption  

E-Print Network (OSTI)

Low-power and Lossy Networks (LLNs), like wireless networks based upon the IEEE 802.15.4 standard, have strong energy constraints, and are moreover subject to frequent transmission errors, not only due to congestion but also to collisions and to radio channel conditions. This paper introduces an analytical model to compute the total energy consumption in an LLN due to the TCP protocol. The model allows us to highlight some tradeoffs as regards the choice of the TCP maximum segment size, of the Forward Error Correction (FEC) redundancy ratio, and of the number of link-layer retransmissions, in order to minimize the total energy consumption.

Ayadi, Ahmed; Ros, David

2010-01-01T23:59:59.000Z

298

Modified SSCP method using sequential electrophoresis of multiple nucleic acid segments  

DOE Patents (OSTI)

The present invention is directed to a method of screening large, complex, polyexonic eukaryotic genes such as the ATM gene for mutations and polymorphisms by an improved version of single strand conformation polymorphism (SSCP) electrophoresis that allows electrophoresis of two or three amplified segments in a single lane. The present invention also is directed to new mutations and polymorphisms in the ATM gene that are useful in performing more accurate screening of human DNA samples for mutations and in distinguishing mutations from polymorphisms, thereby improving the efficiency of automated screening methods.

Gatti, Richard A. (Sherman Oaks, CA)

2002-10-01T23:59:59.000Z

299

Electrical Signal Path Study and Component Assay for the MAJORANA N-Type Segmented Contact Detector  

SciTech Connect

The purpose of the present electrical signal path study is to explore the various issues related to the deployment of highly-segmented low-background Ge detectors for the MAJORANA double-beta decay experiment. A significant challenge is to simultaneously satisfy competing requirements for the mechanical design, electrical readout performance, and radiopurity specifications from the MAJORANA project. Common to all rare search experiments, there is a very stringent limit on the acceptable radioactivity level of all the electronics components involved. Some of the findings are summarized in this report.

Amman, Mark; Bergevin, Marc; Chan, Yuen-Dat; Detwiler, Jason A.; Fujikawa, Brian .; Lesko, Kevin T.; Luke, Paul N.; Prior, Gersende; Poon, Alan W.; Smith, Alan R.; Vetter, Kai; Yaver, Harold; Zimmermann, Sergio

2009-02-24T23:59:59.000Z

300

Changes in dose with segmentation of breast tissues in Monte Carlo calculations for low-energy brachytherapy  

Science Conference Proceedings (OSTI)

Purpose: To investigate the use of various breast tissue segmentation models in Monte Carlo dose calculations for low-energy brachytherapy. Methods: The EGSnrc user-code BrachyDose is used to perform Monte Carlo simulations of a breast brachytherapy treatment using TheraSeed Pd-103 seeds with various breast tissue segmentation models. Models used include a phantom where voxels are randomly assigned to be gland or adipose (randomly segmented), a phantom where a single tissue of averaged gland and adipose is present (averaged tissue), and a realistically segmented phantom created from previously published numerical phantoms. Radiation transport in averaged tissue while scoring in gland along with other combinations is investigated. The inclusion of calcifications in the breast is also studied in averaged tissue and randomly segmented phantoms. Results: In randomly segmented and averaged tissue phantoms, the photon energy fluence is approximately the same; however, differences occur in the dose volume histograms (DVHs) as a result of scoring in the different tissues (gland and adipose versus averaged tissue), whose mass energy absorption coefficients differ by 30%. A realistically segmented phantom is shown to significantly change the photon energy fluence compared to that in averaged tissue or randomly segmented phantoms. Despite this, resulting DVHs for the entire treatment volume agree reasonably because fluence differences are compensated by dose scoring differences. DVHs for the dose to only the gland voxels in a realistically segmented phantom do not agree with those for dose to gland in an averaged tissue phantom. Calcifications affect photon energy fluence to such a degree that the differences in fluence are not compensated for (as they are in the no calcification case) by dose scoring in averaged tissue phantoms. Conclusions: For low-energy brachytherapy, if photon transport and dose scoring both occur in an averaged tissue, the resulting DVH for the entire treatment volume is reasonably accurate because inaccuracies in photon energy fluence are compensated for by inaccuracies in localized dose scoring. If dose to fibroglandular tissue in the breast is of interest, then the inaccurate photon energy fluence calculated in an averaged tissue phantom will result in inaccurate DVHs and average doses for those tissues. Including calcifications necessitates the use of proper tissue segmentation.

Sutherland, J. G. H.; Thomson, R. M.; Rogers, D. W. O. [Carleton Laboratory for Radiotherapy Physics, Department of Physics, Carleton University, Ottawa K1S 5B6 (Canada)

2011-08-15T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
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301

Distinct constrictive processes, separated in time and space,divide Caulobacter inner and outer membranes  

Science Conference Proceedings (OSTI)

Cryo-electron microscope tomography (cryoEM) and a fluorescence loss in photobleaching (FLIP) assay were used to characterize progression of the terminal stages of Caulobacter crescentus cell division. Tomographic cryoEM images of the cell division site show separate constrictive processes closing first the inner, and then the outer, membrane in a manner distinctly different from septum-forming bacteria. The smallest observed pre-fission constrictions were 60 nm for both the inner and outer membrane. FLIP experiments had previously shown cytoplasmic compartmentalization, when cytoplasmic proteins can no longer diffuse between the two nascent progeny cell compartments, occurring 18 min before daughter cell separation in a 135 min cell cycle. Here, we used FLIP experiments with membrane-bound and periplasmic fluorescent proteins to show that (1) periplasmic compartmentalization occurs after cytoplasmic compartmentalization, consistent with the cryoEM observations, and (2) inner membrane and periplasmic proteins can diffuse past the FtsZ constriction site, indicating that the cell division machinery does not block membrane diffusion.

Judd, Ellen M.; Comolli, Luis R.; Chen, Joseph C.; Downing,Kenneth H.; Moerner, W.E.; McAdams, Harley H.

2005-05-01T23:59:59.000Z

302

Method for spatially distributing a population  

DOE Patents (OSTI)

A process for spatially distributing a population count within a geographically defined area can include the steps of logically correlating land usages apparent from a geographically defined area to geospatial features in the geographically defined area and allocating portions of the population count to regions of the geographically defined area having the land usages, according to the logical correlation. The process can also include weighing the logical correlation for determining the allocation of portions of the population count and storing the allocated portions within a searchable data store. The logically correlating step can include the step of logically correlating time-based land usages to geospatial features of the geographically defined area. The process can also include obtaining a population count for the geographically defined area, organizing the geographically defined area into a plurality of sectors, and verifying the allocated portions according to direct observation.

Bright, Edward A [Knoxville, TN; Bhaduri, Budhendra L [Knoxville, TN; Coleman, Phillip R [Knoxville, TN; Dobson, Jerome E [Lawrence, KS

2007-07-24T23:59:59.000Z

303

Planning combat outposts to maximize population security  

E-Print Network (OSTI)

Combat outposts (COPs) are small, well-protected bases from which soldiers reside and conduct operations from. Used extensively during the "Surge" in Iraq, COPs are usually established in populated areas and are prevalent ...

Seidel, Scott B

2010-01-01T23:59:59.000Z

304

HUMAN SUBJECT RESEARCH INVOLVING SPECIAL SUBJECT POPULATIONS  

E-Print Network (OSTI)

, April 18, 1979. While there are legitimate ethical concerns whenever vulnerable populations are studied of which are intended to be submitted later to, or held for inspection by, the Food and Drug Administration

Sibille, Etienne

305

United Nations Population Information Network | Open Energy Information  

Open Energy Info (EERE)

United Nations Population Information Network United Nations Population Information Network Jump to: navigation, search Tool Summary LAUNCH TOOL Name: United Nations Population Information Network Agency/Company /Organization: United Nations Focus Area: People and Policy Resource Type: Dataset Website: www.un.org/popin/ Cost: Free United Nations Population Information Network Screenshot References: United Nations Population Information Network[1] Logo: United Nations Population Information Network The Population Information Network (POPIN) strives to make international, regional and national population information, particularly information available from United Nations sources, easily available to the international community. "The Population Information Network (POPIN) was founded on 9 May 1979, by

306

Automatic segmentation of histological structures in normal and neoplastic mammary gland tissue sections  

SciTech Connect

In this paper we present a scheme for real time segmentation of histological structures in microscopic images of normal and neoplastic mammary gland sections. Paraffin embedded or frozen tissue blocks are sliced, and sections are stained with hematoxylin and eosin (H&E). The sections are then imaged using conventional bright field microscopy. The background of the images is corrected by arithmetic manipulation using a ''phantom.'' Then we use the fast marching method with a speed function that depends on the brightness gradient of the image to obtain a preliminary approximation to the boundaries of the structures of interest within a region of interest (ROI) of the entire section manually selected by the user. We use the result of the fast marching method as the initial condition for the level set motion equation. We run this last method for a few steps and obtain the final result of the segmentation. These results can be connected from section to section to build a three-dimensional reconstruction of the entire tissue block that we are studying.

Fernandez-Gonzalez, Rodrigo; Deschamps, Thomas; Idica, Adam K.; Malladi, Ravi; Ortiz de Solorzano, Carlos

2003-01-18T23:59:59.000Z

307

Seismic fragility formulations for segmented buried pipeline systems including the impact of differential ground subsidence  

Science Conference Proceedings (OSTI)

Though Differential Ground Subsidence (DGS) impacts the seismic response of segmented buried pipelines augmenting their vulnerability, fragility formulations to estimate repair rates under such condition are not available in the literature. Physical models to estimate pipeline seismic damage considering other cases of permanent ground subsidence (e.g. faulting, tectonic uplift, liquefaction, and landslides) have been extensively reported, not being the case of DGS. The refinement of the study of two important phenomena in Mexico City - the 1985 Michoacan earthquake scenario and the sinking of the city due to ground subsidence - has contributed to the analysis of the interrelation of pipeline damage, ground motion intensity, and DGS; from the analysis of the 48-inch pipeline network of the Mexico City's Water System, fragility formulations for segmented buried pipeline systems for two DGS levels are proposed. The novel parameter PGV{sup 2}/PGA, being PGV peak ground velocity and PGA peak ground acceleration, has been used as seismic parameter in these formulations, since it has shown better correlation to pipeline damage than PGV alone according to previous studies. By comparing the proposed fragilities, it is concluded that a change in the DGS level (from Low-Medium to High) could increase the pipeline repair rates (number of repairs per kilometer) by factors ranging from 1.3 to 2.0; being the higher the seismic intensity the lower the factor.

Pineda Porras, Omar Andrey [Los Alamos National Laboratory; Ordaz, Mario [UNAM, MEXICO CITY

2009-01-01T23:59:59.000Z

308

Time Segmentation Approach Allowing QoS and Energy Saving for Wireless Sensor Networks  

E-Print Network (OSTI)

Wireless sensor networks are conceived to monitor a certain application or physical phenomena and are supposed to function for several years without any human intervention for maintenance. Thus, the main issue in sensor networks is often to extend the lifetime of the network by reducing energy consumption. On the other hand, some applications have high priority traffic that needs to be transferred within a bounded end-to-end delay while maintaining an energy efficient behavior. We propose MaCARI, a time segmentation protocol that saves energy, improves the overall performance of the network and enables quality of service in terms of guaranteed access to the medium and end-to-end delays. This time segmentation is achieved by synchronizing the activity of nodes using a tree-based beacon propagation and allocating activity periods for each cluster of nodes. The tree-based topology is inspired from the cluster-tree proposed by the ZigBee standard. The efficiency of our protocol is proven analytically, by simulati...

Chalhoub, Gerard; Misson, Michel

2010-01-01T23:59:59.000Z

309

The Stellar Populations of Seyfert 2 Nuclei  

E-Print Network (OSTI)

We present a preliminary analysis of the stellar populations in the central parsecs of a sample of 22 Seyfert 2 galaxies, based on a careful separation of nebular emission and stellar light in high-spatial resolution HST-STIS spectra. 10% of the surveyed nuclei display stellar populations of intermediate age, 1-2 Gyr old, whereas the remaining targets appear to be evenly split between objects showing only very old stellar populations and nuclei requiring also an additional blue featureless component, which we characterise by means of very young, few-Myr-old stars. The small fraction of stellar population of intermediate age seems to argue against the presence of such a young component, however, since the short lifetime of O-stars would imply recurrent star-formation episodes and the build-up over the last 1-2 Gyr of a detectable intermediate-age population. Additionally, a correlation between the luminosity of such a blue component and the emission from highly-ionised species, together with the general absence of Wolf-Rayet features, further suggests that the featureless continuum arises from the central engine rather than from star-forming regions. We discuss our results in the framework of the unification paradigm and of models for star formation close to supermassive black holes.

Marc Sarzi; Joe Shields; Rick Pogge; Paul Martini

2007-03-30T23:59:59.000Z

310

Modeling Population Exposures to Pollutants Emitted From Natural...  

NLE Websites -- All DOE Office Websites (Extended Search)

Modeling Population Exposures to Pollutants Emitted From Natural Gas Cooking Burners Title Modeling Population Exposures to Pollutants Emitted From Natural Gas Cooking Burners...

311

Tracer populations in the local group  

E-Print Network (OSTI)

, in good agreement with previous work. I go on to develop a set of tracer mass estimators that build on previous work which make use of actual (and not projected) distance and proper motion data, reflecting the amount and quality of data now available to us... ages range from 1-10 Gyr; the scale height of the population increases with age from 200 kpc to around 700 kpc and the metallicity decreases with age to around 20% solar. The typical content of this disk population are A stars, planetary nebulae...

Watkins, Laura Louise

2011-04-19T23:59:59.000Z

312

New thermal model with distinct freeze-out temperatures for baryons and mesons  

SciTech Connect

A significant amount of experimental data for particle production in high-energy heavy ion collisions (10 - 200 GeV/A at center of mass) has been accumulated during last years. Many different theoretical attempts have tried to describe these data using thermal models in the approximation of global thermal equilibrium considering only one freeze-out temperature. However the thermal models often are not able to describe adequately the whole multiplicities of hadrons. For instance, the abundance of strange particles is overestimate and the pion yields are underestimated. In this work is presented a thermal hadronic model with two different temperatures in order to describe the baryonic and mesonic chemical freeze-out in ultra-relativistic heavy ion collisions. The model is used to fit the particle population ratios of the hadrons produced in the reaction. The proposal is not merely to incorporate one additional degree of freedom in the adjustment procedure of data, but to present and alternative scenario for the freeze out stage in the collisional proces s. This new reformulated version of thermal model was applied to a set of data, offering a rather good improvement in the fitting of the calculated particle ratios to the data. The results suggest that the introduced model makes the thermal approach more robust to handle with a larger number of colliding systems and a more comprehensive set of reaction observables.

De Assis, Leonardo P. G.; Duarte, Sergio B. [Centro Brasileiro de Pesquisas Fisicas Dr. Xavier Sigaud 150, 22290-180 Rio de Janeiro-RJ (Brazil); Chiapparini, Marcelo [Instituto de Fisica, Universidade do Estado do Rio de Janeiro Rua Sao Francisco Xavier 524, 20 550-900 Rio de Janeiro-RJ (Brazil); Hirsch, Luciana R. [Departamento de Fisica, Universidade Tecnologica Federal do Parana Av. Sete de Setembro, 3165, 8 0230-901 Curitiba-PR (Brazil); Delfino, Antonio Jr. [Instituto de Fisica, Universidade Federal Fluminense Av. Gal. Milton Tavares de Souza, 24210-346 Niteroi-RJ (Brazil)

2013-05-06T23:59:59.000Z

313

Meter Eligibility Listing Procedure Updated 8/24/11 The California Solar Initiative (CSI) is for all market segments with the exception of New  

E-Print Network (OSTI)

Meter Eligibility Listing Procedure Updated 8/24/11 The California Solar Solar Homes Partnership (NSHP) is for the New Residential Construction market segment. The Emerging

314

EVSE Features Charge Delay Option Power Light Indicator Eight-segment Progress Indicator Auto-restart  

NLE Websites -- All DOE Office Websites (Extended Search)

Charge Delay Option Power Light Indicator Charge Delay Option Power Light Indicator Eight-segment Progress Indicator Auto-restart EVSE Specifications Grid connection Plug and cord NEMA 6-50 Connector type J1772 Test lab certifications UL Listed Approximate size (H x W x D inches) 10 x 13 x 4 Charge level AC Level 2 Input voltage 240 VAC Maximum input current 30 Amp Circuit breaker rating 40 Amp Test Conditions 1 Test date 10/30/2012 Nominal supply voltage (Vrms) 209.04 Supply frequency (Hz) 59.99 Initial ambient temperature (°F) 64 Test Vehicle 1,3 Make and model 2012 Chevrolet Volt Battery type Li-ion Steady state charge power (AC kW) 3.09 Maximum charge power (AC kW) 3.20 EVSE Test Results 1,2,4

315

Apparatus for impingement cooling a side wall adjacent an undercut region of a turbine nozzle segment  

SciTech Connect

A gas turbine nozzle segment has outer and inner bands and vanes therebetween. Each band includes a side wall, a cover and an impingement plate between the cover and nozzle wall defining two cavities on opposite sides of the impingement plate. Cooling steam is supplied to one cavity for flow through apertures of the impingement plate to cool the nozzle wall. The side wall of the band and inturned flange define with the nozzle wall an undercut region. Slots are formed through the inturned flange along the nozzle side wall. A plate having through-apertures extending between opposite edges thereof is disposed in each slot, the slots and plates being angled such that the cooling medium exiting the apertures in the second cavity lie close to the side wall for focusing and targeting cooling medium onto the side wall.

Burdgick, Steven Sebastian (Schenectady, NY)

2002-01-01T23:59:59.000Z

316

Method of controlling the side wall thickness of a turbine nozzle segment for improved cooling  

SciTech Connect

A gas turbine nozzle segment has outer and inner bands and a vane extending therebetween. Each band has a side wall, a cover and an impingement plate between the cover and nozzle wall defining two cavities on opposite sides of the impingement plate. Cooling steam is supplied to one cavity for flow through apertures of the impingement plate to cool the nozzle wall. The side wall of the band has an inturned flange defining with the nozzle wall an undercut region. The outer surface of the side wall is provided with a step prior to welding the cover to the side wall. A thermal barrier coating is applied in the step and, after the cover is welded to the side wall, the side wall is finally machined to a controlled thickness removing all, some or none of the coating.

Burdgick, Steven Sebastian (Schenectady, NY)

2002-01-01T23:59:59.000Z

317

The accelerated site technology deployment program presents the segmented gate system  

Science Conference Proceedings (OSTI)

The Department of Energy (DOE) is working to accelerate the acceptance and application of innovative technologies that improve the way the nation manages its environmental remediation problems. The DOE Office of Science and Technology established the Accelerated Site Technology Deployment Program (ASTD) to help accelerate the acceptance and implementation of new and innovative soil and ground water remediation technologies. Coordinated by the Department of Energy's Idaho Office, the ASTD Program reduces many of the classic barriers to the deployment of new technologies by involving government, industry, and regulatory agencies in the assessment, implementation, and validation of innovative technologies. The paper uses the example of the Segmented Gate System (SGS) to illustrate how the ASTD program works. The SGS was used to cost effectively separate clean and contaminated soil for four different radionuclides: plutonium, uranium, thorium, and cesium. Based on those results, it has been proposed to use the SGS at seven other DOE sites across the country.

PATTESON,RAYMOND; MAYNOR,DOUG; CALLAN,CONNIE

2000-02-24T23:59:59.000Z

318

Railroad impact study: 63 rail-line segments in South Dakota  

SciTech Connect

The primary concern of the study (in 2 volumes) was the trade area served by a rail line. The trade area was determined on the assumption that a farmer will haul his grain to the nearest elevator located on a railroad line. The basic approach in this study has been to measure potential demand for rail transportation, not to analyze the traffic data accumulated in the recent past. The first five chapters give the summaries for the entire state of South Dakota. The rail-line segments have been revised and recorded to comply as nearly as possible, with that, used by the various railroad companies. Some railroad data were made available for this study to provide a basis for estimating the rail potential in the major cities of South Dakota.

Poth, L.A.; Peterson, J.

1977-12-01T23:59:59.000Z

319

The X-ray afterglow flat segment in short GRB 051221A: Energy injection from a millisecond magnetar?  

E-Print Network (OSTI)

The flat segment lasting $\\sim 10^4$ seconds in the X-ray afterglow of GRB051221A represents the first clear case of strong energy injection in the external shock of a short GRB afterglow. In this work, we show that a millisecond pulsar with dipole magnetic field $\\sim 10^{14}$ Gauss could well account for that energy injection. The good quality X-ray flat segment thus suggests that the central engine of this short burst may be a millisecond magnetar.

Yizhong Fan; Dong Xu

2006-05-18T23:59:59.000Z

320

Apparatus and methods for impingement cooling of an undercut region adjacent a side wall of a turbine nozzle segment  

SciTech Connect

A gas turbine nozzle segment has outer and inner bands. Each band includes a side wall, a cover and an impingement plate between the cover and nozzle wall defining two cavities on opposite sides of the impingement plate. Cooling steam is supplied to one cavity for flow through apertures of the impingement plate to cool the nozzle wall. The side wall of the band and inturned flange define with the nozzle wall an undercut region. The inturned flange has a plurality of apertures for directing cooling steam to cool the side wall between adjacent nozzle segments.

Burdgick, Steven Sebastian (Schenectady, NY); Itzel, Gary Michael (Simpsonville, SC)

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Atlantic Bluefin Tuna (Thunnus thynnus) Population Dynamics  

E-Print Network (OSTI)

Atlantic Bluefin Tuna (Thunnus thynnus) Population Dynamics Delineated by Organochlorine Tracers R bluefin tuna (ABFT) are highly valued and heavily exploited, and critical uncertainties regarding. Hereweshowthatorganochlorinepesticidesandpolychlorinated biphenyls (PCBs) can be used as tracers of bluefin tuna foraging grounds in the North Atlantic

Hilton, Eric J.

322

Ontology-driven, unsupervised instance population  

Science Conference Proceedings (OSTI)

The Semantic Web's need for machine understandable content has led researchers to attempt to automatically acquire such content from a number of sources, including the web. To date, such research has focused on ''document-driven'' systems that individually ... Keywords: Classification, Confidence assessment, Instance population, Ontology-driven, Semantic Web

Luke K. McDowell; Michael Cafarella

2008-09-01T23:59:59.000Z

323

Multi-organ segmentation from multi-phase abdominal CT via 4D graphs using enhancement, shape and location optimization  

Science Conference Proceedings (OSTI)

The interpretation of medical images benefits from anatomical and physiological priors to optimize computer-aided diagnosis (CAD) applications. Diagnosis also relies on the comprehensive analysis of multiple organs and quantitative measures of soft tissue. ... Keywords: 4D graph, enhancement, multi-phase CT, segmentation, shape

Marius George Linguraru; John A. Pura; Ananda S. Chowdhury; Ronald M. Summers

2010-09-01T23:59:59.000Z

324

Classification of emotion in spoken Finnish using vowel-length segments: Increasing reliability with a fusion technique  

Science Conference Proceedings (OSTI)

Classification of emotional content of short Finnish emotional [a:] vowel speech samples is performed using vocal source parameter and traditional intonation contour parameter derived prosodic features. A multiple kNN classifier based decision level ... Keywords: Automatic classification of emotion, Classifier fusion, Prosodic features, Spoken Finnish, Vocal source features, Vowel segments

Eero Väyrynen; Juhani Toivanen; Tapio Seppänen

2011-03-01T23:59:59.000Z

325

Atacama: An Open FPGA-Based Platform for Mixed-Criticality Communication in Multi-segmented Ethernet Networks  

Science Conference Proceedings (OSTI)

Ethernet is widely recognized as an attractive networking technology for modern distributed real-time systems. However, standard Ethernet components require specific modifications and hardware support to provide strict latency guarantees necessary for ... Keywords: Real-Time Ethernet, safety-critical systems, open-source hardware design, multi-segmented networks

Gonzalo Carvajal, Miguel Figueroa, Robert Trausmuth, Sebastian Fischmeister

2013-04-01T23:59:59.000Z

326

IMAGE SEGMENTATION FOR PHASE-CONTRAST HARD X-RAY CMT OF C/C Gerard L. Vignoles  

E-Print Network (OSTI)

1 IMAGE SEGMENTATION FOR PHASE-CONTRAST HARD X-RAY CMT OF C/C COMPOSITES Gerard L. Vignoles/C composites, computerized microtomographs have been acquired with synchrotron radiation X-rays. Due ranging between 0° and 180°, were acquired each time using a Gd2O3S:Tb scintillator, a light amplification

Paris-Sud XI, Université de

327

Pre-processing Colour Images with a Self-Organising Map: Baking Curve Identification and Bake Image Segmentation  

E-Print Network (OSTI)

Segmentation Leonard G. C. Hamey ¢¡ £ Len.Hamey@mq.edu.au Jeffrey C.-H. Yeh ¢¡ £ Jeffrey.Yeh@mq.edu.au Tas as part of the image calibration. #12;Figure 1. Image of samples of Water Cracker final product

Hamey, Len

328

3D automatic anatomy segmentation based on iterative graph-cut-ASM  

SciTech Connect

Purpose: This paper studies the feasibility of developing an automatic anatomy segmentation (AAS) system in clinical radiology and demonstrates its operation on clinical 3D images. Methods: The AAS system, the authors are developing consists of two main parts: object recognition and object delineation. As for recognition, a hierarchical 3D scale-based multiobject method is used for the multiobject recognition task, which incorporates intensity weighted ball-scale (b-scale) information into the active shape model (ASM). For object delineation, an iterative graph-cut-ASM (IGCASM) algorithm is proposed, which effectively combines the rich statistical shape information embodied in ASM with the globally optimal delineation capability of the GC method. The presented IGCASM algorithm is a 3D generalization of the 2D GC-ASM method that they proposed previously in Chen et al.[Proc. SPIE, 7259, 72590C1-72590C-8 (2009)]. The proposed methods are tested on two datasets comprised of images obtained from 20 patients (10 male and 10 female) of clinical abdominal CT scans, and 11 foot magnetic resonance imaging (MRI) scans. The test is for four organs (liver, left and right kidneys, and spleen) segmentation, five foot bones (calcaneus, tibia, cuboid, talus, and navicular). The recognition and delineation accuracies were evaluated separately. The recognition accuracy was evaluated in terms of translation, rotation, and scale (size) error. The delineation accuracy was evaluated in terms of true and false positive volume fractions (TPVF, FPVF). The efficiency of the delineation method was also evaluated on an Intel Pentium IV PC with a 3.4 GHZ CPU machine. Results: The recognition accuracies in terms of translation, rotation, and scale error over all organs are about 8 mm, 10 deg. and 0.03, and over all foot bones are about 3.5709 mm, 0.35 deg. and 0.025, respectively. The accuracy of delineation over all organs for all subjects as expressed in TPVF and FPVF is 93.01% and 0.22%, and all foot bones for all subjects are 93.75% and 0.28%, respectively. While the delineations for the four organs can be accomplished quite rapidly with average of 78 s, the delineations for the five foot bones can be accomplished with average of 70 s. Conclusions: The experimental results showed the feasibility and efficacy of the proposed automatic anatomy segmentation system: (a) the incorporation of shape priors into the GC framework is feasible in 3D as demonstrated previously for 2D images; (b) our results in 3D confirm the accuracy behavior observed in 2D. The hybrid strategy IGCASM seems to be more robust and accurate than ASM and GC individually; and (c) delineations within body regions and foot bones of clinical importance can be accomplished quite rapidly within 1.5 min.

Chen, Xinjian; Bagci, Ulas [Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, Building 10 Room 1C515, Bethesda, Maryland 20892-1182 and Life Sciences Research Center, School of Life Sciences and Technology, Xidian University, Xi'an 710071 (China); Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, Building 10 Room 1C515, Bethesda, Maryland 20892-1182 (United States)

2011-08-15T23:59:59.000Z

329

350nm CMOS test-chip for architecture verification of real-time QVGA color-video segmentation at the 90nm technology node  

Science Conference Proceedings (OSTI)

We designed a cell-network-based full-custom test-chip for gray-scale/color image segmentation of real-time video-signals in 350nm CMOS technology. From this digital test-chip design, fully-integrated QVGA-size video-picture-segmentation chips, with ...

Takashi Morimoto; Yohmei Harada; Tetsushi Koide; Hans Jürgen Mattausch

2004-01-01T23:59:59.000Z

330

Interactive Effects of Geography and Host Plant Species on Genetic and Phenotypic Variation of Cotton Fleahopper Populations  

E-Print Network (OSTI)

The cotton fleahopper, Pseudatomoscelis seriatus (Reuter) is a widely distributed insect across the United States. Although, it feeds on several native wild hosts, its agricultural importance lies as an economic pest of cotton in several states in the southern United States. No studies have addressed intraspecific genetic and phenotypic variation of this insect pest at a large geographic scale. I examined genetic variation among cotton fleahopper populations associated with cotton in different geographic locations across the southern United States (Chapter II). Using dominant, neutral, nuclear molecular markers (AFLP, amplified fragment length polymorphism) and mitochondrial DNA sequences, I found that overall genetic differentiation among different geographic populations, collected from cotton in eleven cotton growing states, was low but significant. AFLP revealed the presence of three regional groups representing western (Arizona), central (Texas, Oklahoma, Arkansas, Louisiana, Mississippi and Alabama), and eastern (Florida, Georgia, South Carolina and North Carolina) populations. I examined if there were distinct lineages of cotton fleahoppers associated with three of its host plant species: cotton (Gossypium hirsutum), horsemint (Monarda punctata) and woolly croton (Croton capitatus) in five different locations of Texas by using AFLP markers (Chapter III). I found two distinct host-associated lineages at three locations and local panmixia in the other two locations. I tested if host preference of cotton fleahoppers were affected by geographic variation and prior experience. Conducting choice tests with a Y-tube olfactometer, I found that host preference in cotton fleahoppers for horsemint (one of its native host plants) is conserved and unaffected by individual?s prior experience with cotton (Chapter IV). Finally, I explored the role of host-plant species in morphological differentiation of the cotton fleahopper in two locations that differ in presence of distinct host-associated lineages. Using a geometric-morphometric approach, I detected significant effect of host plant and geography on body morphology and wing shape of cotton fleahopper populations (Chapter V). Length of antenna and rostrum were two important traits associated with morphological divergence of cotton and horsemint associated insect populations. Cotton associated individuals had relatively longer antenna and rostrum compared to individuals associated with horsemint.

Barman, Apurba

2011-12-01T23:59:59.000Z

331

Population genetic structure of Conophthorus ponderosae Hopkins (Coleoptera: Scolytidae) inferred from mitochondrial DNA haplotypes  

E-Print Network (OSTI)

Pine cone beetles (Conophthorus sp.) are serious pests of many forest ecosystems since they burrow into pine cone tissues for egg deposition, causing the death of the seeds. Management of these beetles in natural and commercial stands of pines has been problematic due to lack of understanding about species limits and distribution. This study was conducted to investigate the phylogeography and phylogenetics of the genus. Several species represented by disjunct populations appear to be monophyletic including Conophthorus edulis, C. mexicanus, C. coniperda, and C. conicollens, whereas C. ponderosae is polyphyletic with many distinct clades isolated by geography. This study explored whether host use or geography has played a greater role in the diversification of this genus, focusing on the polyphyletic C. ponderosae and the monophyletic C. edulis. In the first study, 751bp of the mtDNA CO1 gene were sequenced to reconstruct a phylogeny of the genus, and the distribution and host use were compared to investigate whether these factors were significantly associated. The second study addressed population structure and possible historical influences on the C. edulis and C. ponderosae populations using a nested clade analysis of the mtDNA haplotypes. Despite potential limitations due to sampling, several conclusions could be drawn. Three separate haplotype networks were found for the C. ponderosae haplotypes, indicating that there have been at least three lineages that have associated with P. ponderosa. Geography was significantly associated with the phylogeny at greater distances (>900km), but host use was not significant. At the species level, association with geography is variable. Population structure for C. ponderosae at the species level is minimal, and suggests that there has not been much time for lineage sorting of the haplotypes based on the nested clade analysis as compared to C. edulis.

Menard, Katrina Louise

2006-08-01T23:59:59.000Z

332

EO 12898: Environmental Justice in Minority Populations and Low-Income Populations  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

WASHINGTON WASHINGTON February 11, 1994 MEMORANDUM FOR THE HEADS OF ALL DEPARTMENTS AND AGENCIES SUBJECT: Executive Order on Federal Actions to Address Environmental Justice in Minority Populations and Low- Income Populations Today I have issued an Executive Order on Federal Actions to Address Environmental Justice in Minority Populations and Low-Income Populations. That order is designed to focus Federal attention on the environmental and human health conditions in minority communities and low-income communities with the goal of achieving environmental justice. That order is also intended to promote nondiscrimination in Federal programs substantially affecting human health and the environment, and to provide minority communities and low-income communities access to public

333

Bacterial Population Genetics in a Forensic Context  

SciTech Connect

This report addresses the recent Department of Homeland Security (DHS) call for a Phase I study to (1) assess gaps in the forensically relevant knowledge about the population genetics of eight bacterial agents of concern, (2) formulate a technical roadmap to address those gaps, and (3) identify new bioinformatics tools that would be necessary to analyze and interpret population genetic data in a forensic context. The eight organisms that were studied are B. anthracis, Y. pestis, F. tularensis, Brucella spp., E. coli O157/H7, Burkholderia mallei, Burkholderia pseudomallei, and C. botulinum. Our study focused on the use of bacterial population genetics by forensic investigators to test hypotheses about the possible provenance of an agent that was used in a crime or act of terrorism. Just as human population genetics underpins the calculations of match probabilities for human DNA evidence, bacterial population genetics determines the level of support that microbial DNA evidence provides for or against certain well-defined hypotheses about the origins of an infecting strain. Our key findings are: (1) Bacterial population genetics is critical for answering certain types of questions in a probabilistic manner, akin (but not identical) to 'match probabilities' in DNA forensics. (2) A basic theoretical framework for calculating likelihood ratios or posterior probabilities for forensic hypotheses based on microbial genetic comparisons has been formulated. This 'inference-on-networks' framework has deep but simple connections to the population genetics of mtDNA and Y-STRs in human DNA forensics. (3) The 'phylogeographic' approach to identifying microbial sources is not an adequate basis for understanding bacterial population genetics in a forensic context, and has limited utility, even for generating 'leads' with respect to strain origin. (4) A collection of genotyped isolates obtained opportunistically from international locations augmented by phylogenetic representations of relatedness will not and enzootic outbreaks noted through international outbreak surveillance systems, and 'representative' genetic sequences from each outbreak. (5) Interpretation of genetic comparisons between an attack strain and reference strains requires a model for the network structure of maintenance foci, enzootic outbreaks, and human outbreaks of that disease, coupled with estimates of mutational rate constants. Validation of the model requires a set of sequences from exemplary outbreaks and laboratory data on mutation rates during animal passage. The necessary number of isolates in each validation set is determined by disease transmission network theory, and is based on the 'network diameter' of the outbreak. (6) The 8 bacteria in this study can be classified into 4 categories based on the complexity of the transmission network structure of their natural maintenance foci and their outbreaks, both enzootic and zoonotic. (7) For B. anthracis, Y. pestis, E. coli O157, and Brucella melitensis, and their primary natural animal hosts, most of the fundamental parameters needed for modeling genetic change within natural host or human transmission networks have been determined or can be estimated from existing field and laboratory studies. (8) For Burkholderia mallei, plausible approaches to transmission network models exist, but much of the fundamental parameterization does not. In addition, a validated high-resolution typing system for characterizing genetic change within outbreaks or foci has not yet been demonstrated, although a candidate system exists. (9) For Francisella tularensis, the increased complexity of the transmission network and unresolved questions about maintenance and transmission suggest that it will be more complex and difficult to develop useful models based on currently available data. (10) For Burkholderia pseudomallei and Clostridium botulinum, the transmission and maintenance networks involve complex soil communities and metapopulations about which very little is known. It is not clear that these pathogens can be brought into the in

Velsko, S P

2009-11-02T23:59:59.000Z

334

Segmentation and quantification of materials with energy discriminating computed tomography: A phantom study  

Science Conference Proceedings (OSTI)

Purpose: To experimentally investigate whether a computed tomography (CT) system based on CdZnTe (CZT) detectors in conjunction with a least-squares parameter estimation technique can be used to decompose four different materials. Methods: The material decomposition process was divided into a segmentation task and a quantification task. A least-squares minimization algorithm was used to decompose materials with five measurements of the energy dependent linear attenuation coefficients. A small field-of-view energy discriminating CT system was built. The CT system consisted of an x-ray tube, a rotational stage, and an array of CZT detectors. The CZT array was composed of 64 pixels, each of which is 0.8x0.8x3 mm. Images were acquired at 80 kVp in fluoroscopic mode at 50 ms per frame. The detector resolved the x-ray spectrum into energy bins of 22-32, 33-39, 40-46, 47-56, and 57-80 keV. Four phantoms were constructed from polymethylmethacrylate (PMMA), polyethylene, polyoxymethylene, hydroxyapatite, and iodine. Three phantoms were composed of three materials with embedded hydroxyapatite (50, 150, 250, and 350 mg/ml) and iodine (4, 8, 12, and 16 mg/ml) contrast elements. One phantom was composed of four materials with embedded hydroxyapatite (150 and 350 mg/ml) and iodine (8 and 16 mg/ml). Calibrations consisted of PMMA phantoms with either hydroxyapatite (100, 200, 300, 400, and 500 mg/ml) or iodine (5, 15, 25, 35, and 45 mg/ml) embedded. Filtered backprojection and a ramp filter were used to reconstruct images from each energy bin. Material segmentation and quantification were performed and compared between different phantoms. Results: All phantoms were decomposed accurately, but some voxels in the base material regions were incorrectly identified. Average quantification errors of hydroxyapatite/iodine were 9.26/7.13%, 7.73/5.58%, and 12.93/8.23% for the three-material PMMA, polyethylene, and polyoxymethylene phantoms, respectively. The average errors for the four-material phantom were 15.62% and 2.76% for hydroxyapatite and iodine, respectively. Conclusions: The calibrated least-squares minimization technique of decomposition performed well in breast imaging tasks with an energy resolving detector. This method can provide material basis images containing concentrations of the relevant materials that can potentially be valuable in the diagnostic process.

Le, Huy Q.; Molloi, Sabee [Department of Radiological Sciences, University of California, Irvine, California 92697 (United States)

2011-01-15T23:59:59.000Z

335

Population Viability Analysis of Riverine Fishes  

DOE Green Energy (OSTI)

Many utilities face conflkts between two goals: cost-efficient hydropower generation and protecting riverine fishes. Research to develop ecological simulation tools that can evaluate alternative mitigation strategies in terms of their benefits to fish populations is vital to informed decision-making. In this paper, we describe our approach to population viability analysis of riverine fishes in general and Snake River white sturgeon in particular. We are finding that the individual-based modeling approach used in previous in-stream flow applications is well suited to addressing questions about the viability of species of concern for several reasons. Chief among these are: (1) the abiIity to represent the effects of individual variation in life history characteristics on predicted population viabili~, (2) the flexibili~ needed to quanti~ the ecological benefits of alternative flow management options by representing spatial and temporal variation in flow and temperaturty and (3) the flexibility needed to quantifi the ecological benefits of non-flow related manipulations (i.e., passage, screening and hatchery supplementation).

Bates, P.; Chandler, J.; Jager, H.I.; Lepla, K.; Van Winkle, W.

1999-04-12T23:59:59.000Z

336

Bull Trout Population and Habitat Surveys in the Middle Fork Willamette and McKenzie Rivers, Annual Report 2002.  

DOE Green Energy (OSTI)

Bull trout in the Willamette River Basin were historically distributed throughout major tributaries including the Middle Fork Willamette and McKenzie rivers. Habitat degradation, over-harvest, passage barriers, fish removal by rotenone, and hybridization and competition with non-native brook trout are all likely factors that have led to the decline of bull trout in the Willamette Basin (Ratliff and Howell 1992). The U.S. Fish and Wildlife Service listed the Columbia River bull trout population segment as Threatened under the federal Endangered Species Act in 1998. Four bull trout populations were isolated in the upper Willamette River following the construction of flood control dams on the South Fork McKenzie River, McKenzie River, and Middle Fork Willamette River that created Cougar, Trail Bridge, and Hills Creek reservoirs. Buchanan et al. (1997) described the population in the main stem McKenzie as 'of special concern', the South Fork McKenzie population as 'high risk of extinction', the population above Trail Bridge Reservoir as 'high risk of extinction', and bull trout in the Middle Fork Willamette as 'probably extinct'. Various management efforts such as strict angling regulations and passage improvement projects have been implemented to stabilize and rehabilitate bull trout habitat and populations in the McKenzie River over the past 10 years. Since 1997, bull trout fry from Anderson Creek on the upper McKenzie River have been transferred to the Middle Fork Willamette basin above Hills Creek Reservoir in an attempt to re-establish a reproducing bull trout population. This project was developed in response to concerns over the population status and management of bull trout in the McKenzie and Middle Fork Willamette Rivers by the Oregon Department of Fish and Wildlife during the early 1990s. The project was conducted under measure 9.3G(2) of the Columbia Basin Fish and Wildlife Program to monitor the status, life history, habitat needs, and limiting factors for bull trout within sub basins of the Columbia River. Also, this project provides information to develop native fish recovery plans such as the Oregon Plan for Salmon and Watersheds and the U.S. Fish and Wildlife Bull Trout Recovery Plan.

Seals, Jason; Reis, Kelly

2003-10-01T23:59:59.000Z

337

Vehicle Technologies Office: Fact #661: February 7, 2011 Population Density  

NLE Websites -- All DOE Office Websites (Extended Search)

1: February 7, 1: February 7, 2011 Population Density to someone by E-mail Share Vehicle Technologies Office: Fact #661: February 7, 2011 Population Density on Facebook Tweet about Vehicle Technologies Office: Fact #661: February 7, 2011 Population Density on Twitter Bookmark Vehicle Technologies Office: Fact #661: February 7, 2011 Population Density on Google Bookmark Vehicle Technologies Office: Fact #661: February 7, 2011 Population Density on Delicious Rank Vehicle Technologies Office: Fact #661: February 7, 2011 Population Density on Digg Find More places to share Vehicle Technologies Office: Fact #661: February 7, 2011 Population Density on AddThis.com... Fact #661: February 7, 2011 Population Density The density of the population in the U.S., measured as the number of people

338

Who Will More Likely Buy PHEV: A Detailed Market Segmentation Analysis  

DOE Green Energy (OSTI)

Understanding the diverse PHEV purchase behaviors among prospective new car buyers is key for designing efficient and effective policies for promoting new energy vehicle technologies. The ORNL MA3T model developed for the U.S. Department of Energy is described and used to project PHEV purchase probabilities by different consumers. MA3T disaggregates the U.S. household vehicle market into 1458 consumer segments based on region, residential area, driver type, technology attitude, home charging availability and work charging availability and is calibrated to the EIA s Annual Energy Outlook. Simulation results from MA3T are used to identify the more likely PHEV buyers and provide explanations. It is observed that consumers who have home charging, drive more frequently and live in urban area are more likely to buy a PHEV. Early adopters are projected to be more likely PHEV buyers in the early market, but the PHEV purchase probability by the late majority consumer can increase over time when PHEV gradually becomes a familiar product. Copyright Form of EVS25.

Lin, Zhenhong [ORNL; Greene, David L [ORNL

2010-01-01T23:59:59.000Z

339

Urban modeling based on segmentation and regularization of airborne lidar point clouds  

E-Print Network (OSTI)

This paper presents an approach to process raw lidar 3-D point clouds over urban area and extract terrain, buildings and other urban features. In the initial step, “non-ground points ” are separated from ground points using a one dimensional filtering process based on the slope between two consecutive points in the point cloud and the terrain elevation in the vicinity of the points. In the next step, the non-ground point dataset is processed to segment individual buildings. This is accomplished by using a 3-D regional growing approach. At the end of this step, each lidar point is attributed to a building. The first step towards building reconstruction is to obtain an approximate footprint of the building, which is accomplished by extracting the points on the building boundary by a modified convex hull algorithm. Once the footprint boundary points are found, their edges are regularized by using a least squares model to form the final building shape. Mathematic formulation of 3D region growing and boundary regularization is presented. Tests results of reconstructed buildings over complex urban areas are reported. 1.

Aparajithan Sampath; Jie Shan

2004-01-01T23:59:59.000Z

340

Genetic Diversity and Population Structure of the Arabian Horse Populations from Syria and other Countries  

E-Print Network (OSTI)

Humans and horses weaved together wonderful stories of adventure and generosity. As a part of human history and civilization, Arabian horses ignite imagination throughout the world. Populations of this breed exist in many countries. Here I explored different populations of Arabians representing Middle Eastern and Western populations. The main two aims of this study were to provide the genetic diversity description of Arabians from different origins and to examine the traditional classification system of the breed. A third aim was to tackle the distribution pattern of the genetic variability within the genome to show whether there are differences in relative variability of different types of markers. First, I analyzed the genetic structure of 537Arabian horses from seven populations by using microsatellites. The results consistently showed higher levels of diversity within the Middle Eastern populations compared to the Western populations. All American-Arabians showed differentiation from Middle Eastern populations. Second, I sequenced the whole mtDNA D-loop of 251 Arabian horses. The whole D-loop sequence was more informative than using just the HVR1. Native populations from the Middle East, such as Syrian, represented a hot spot of genetic diversity. Most importantly, there was no evidence that the Arabian horse breed has clear subdivisions depending on the traditional maternal based strain classification system. Third, I tested the heterozygosity distribution pattern along the genome of 22 Peruvian Paso horses using 232 microsatellites and Single Nucleotide Polymorphisms (SNPs). The pattern of genetic diversity was completely different between these two markers where no correlation was found. Runs of homozygosity test of SNPs and associated microsatellites noticeably showed that all of associated microsatellites loci were homozygous in the matched case. The findings of this study will help in understanding the evolutionary history and developing breeding and conservation programs of horses. This study provided databases including parentage testing system and maternal lineages that will help to recover the Syrian Arabian population after the armed conflict started in Syria in 2011. The results here can be applied not only to horses, but also to other animal species with similar criteria.

Khanshour, Anas M

2013-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Superposition Principle and the Problem of the Additivity of the Energies and Momenta of Distinct Electromagnetic Fields  

E-Print Network (OSTI)

In this paper we prove in a rigorous mathematical way (using the Clifford bundle formalism) that the energies and momenta of two distinct and arbitrary free Maxwell fields (of finite energies and momenta) that are superposed are additive and thus that there is no incompatibility between the principle of superposition of fields and the principle of energy-momentum conservation, contrary to some recent claims. Our proof depends on a noticeable formula for the energy-momentum 1-form fields T^{a},namely Riesz formula, which is valid for any electromagnetic field configuration F satisfying Maxwell equation.

Eduardo Notte-Cuello; Waldyr A. Rodrigues Jr

2006-12-12T23:59:59.000Z

342

Segment-Based Recognition on the PhoneBook Task: Initial Results and Observations on Duration Modeling  

E-Print Network (OSTI)

This paper describes preliminary recognition experiments on PhoneBook [1], a corpus of isolated, telephone-bandwidth, read words from a large (almost 8,000-word) vocabulary. We have chosen this corpus as a testbed for experiments on the language model-independent parts of a segment-based recognizer. We present results showing that a segment-based recognizer performs well on this task, and that a simple Gaussian mixture phone duration model significantly reduces the error rate. We compare context-independent, stress-dependent, and word position-dependent duration models and obtain relative error rate reductions of up to 12% on the test set. Finally, we make some observations regarding the effects of stress and word position in this isolated-word task and discuss our plans for further research using PhoneBook. 1.

Karen Livescu; James Glass

2001-01-01T23:59:59.000Z

343

Variability of Population-Weighted Seasonal Heating Degree Days  

Science Conference Proceedings (OSTI)

Regional and national heating fuel demand is related to both weather and population density. This study analyzes the variability of population-weighted, seasonal heating degree days for the coterminous 48 states. A risk assessment of unusual ...

Nathaniel B. Guttman

1983-03-01T23:59:59.000Z

344

Ecosystem-specific selection pressures revealed through comparative population genomics  

E-Print Network (OSTI)

Bacterial populations harbor vast genetic diversity that is continually shaped by abiotic and biotic selective pressures, as well as by neutral processes. Individuals coexisting in the same geographically defined population ...

Coleman, Maureen L.

345

Will China's Vehicle Population Grow Even Faster than Forecasted?  

E-Print Network (OSTI)

Daniel Sperling. 2011. “China’s Soaring Vehicle Population:the longer version, “China’s Soaring Vehicle Population:Vehicle Sales and Stock in China,” Energy Policy, 43: 17–29.

Wang, Yunshi; Teter, Jacob; Sperling, Daniel

2012-01-01T23:59:59.000Z

346

Adiabatic quantum simulation with a segmented ion trap: Application to long-distance entanglement in quantum spin systems  

E-Print Network (OSTI)

We discuss systems of ions in segmented linear Paul traps for the quantum simulation of spin models which exhibit long-distance entanglement (LDE) in the ground state. The axial potential can be tailored to create different coupling patterns suitable to create LDE in quantum spin chains. Microwave pulses are used to implement various kinds of spin-spin interaction Hamiltonians, which can be varied adiabatically thereby realizing the adiabatic preparation of the ground states of quantum spin Hamiltonians exhibiting LDE.

S. Zippilli; M. Johanning; S. M. Giampaolo; Ch. Wunderlich; F. Illuminati

2013-03-31T23:59:59.000Z

347

Overview of the Electrical Energy Segment of the Energy Information Administration/ Manufacturing Consumption Report  

E-Print Network (OSTI)

At the end of 1997, The Energy Information Administration (EIA) published a report titled What Took Place in the Economic Environment Between 1991 and 1994 That Affected the Energy Manufacturers Used? This report contains information gathered from Manufacturing Energy Consumption Surveys (MECS), representing a sampling of over 250,000 manufacturing establishments in 52 industries and nine geographical Census divisions. Although the report covers natural gas, distillate fuel oil, residual fuel oil, liquefied petroleum gas, coke and breeze, coal, and electricity, only the electricity segment is overviewed. Along with pure electrical energy consumption information, newly available data covers methods that manufacturers used to purchase and modify electric motor systems. The report also introduces the US Department of Energy's Motor Challenge Program and the US Environmental Protection Agency's Green Lights and Energy Star Programs. Topics such as changes in the electricity market, technology improvements, price disparities, and lessons learned from the natural gas restructuring as related to the electric utility deregulation relate the changes that are impacting the industrial environment. Although the report details information from many industries, the four major energy consumers in the manufacturing sector are: * Petroleum and Coal Products (SIC 29) * Chemicals and Allied Products (SIC 28) * Paper and Allied Partners (SIC 26) * Primary Metal Industries (SIC 33) These industries are also very proactive in their attempts to promote energy efficiency in all areas, including electrical. For example, the IEEE-841 Standard motor is a result of the work of some of these industries. The impact on the industrial Maintenance, Repair, and Operations (MRO) suppliers and Original Equipment Manufacturers (OEM) markets show the need for increasing awareness in all aspects of electrical energy, especially in light of the implementation of the Energy Policy Act and the deregulation of the utility industry.

Lockhead, S.

1999-05-01T23:59:59.000Z

348

Joint production and economic retention quantity decisions in capacitated production systems serving multiple market segments  

E-Print Network (OSTI)

In this research, we consider production/inventory management decisions of a rmthat sells its product in two market segments during a nite planning horizon. In thebeginning of each period, the rm makes a decision on how much to produce basedon the production capacity and the current on-hand inventory available. After theproduction is made at the beginning of the period, the rm rst satises the stochasticdemand from customers in its primary market. Any primary market demand thatcannot be satised is lost. After satisfying the demand from the primary market, ifthere is still inventory on hand, all or part of the remaining products can be sold ina secondary market with ample demand at a lower price. Hence, the second decisionthat the rm makes in each period is how much to sell in the secondary market, orequivalently, how much inventory to carry to the next period.The objective is to maximize the expected net revenue during a nite planninghorizon by determining the optimal production quantity in each period, and theoptimal inventory amount to carry to the next period after the sales in primary andsecondary markets. We term the optimal inventory amount to be carried to the nextperiod as \\economic retention quantity". We model this problem as a nite horizonstochastic dynamic program. Our focus is to characterize the structure of the optimalpolicy and to analyze the system under dierent parameter settings. Conditioning on given parameter set, we establish lower and upper bounds on the optimal policyparameters. Furthermore, we provide computational tools to determine the optimalpolicy parameters. Results of the numerical analysis are used to provide furtherinsights into the problem from a managerial perspective.

Katariya, Abhilasha Prakash

2008-08-01T23:59:59.000Z

349

Interactive exploration and analysis of large scale turbulent combustion using topology-based data segmentation  

E-Print Network (OSTI)

Abstract—Large-scale simulations are increasingly being used to study complex scientific and engineering phenomena. As a result, advanced visualization and data analysis are also becoming an integral part of the scientific process. Often, a key step in extracting insight from these large simulations involves the definition, extraction, and evaluation of features in the space and time coordinates of the solution. However, in many applications these features involve a range of parameters and decisions that will affect the quality and direction of the analysis. Examples include particular level sets of a specific scalar field, or local inequalities between derived quantities. A critical step in the analysis is to understand how these arbitrary parameters/decisions impact the statistical properties of the features, since such a characterization will help to evaluate the conclusions of the analysis as a whole. We present a new topological framework that in a single pass extracts and encodes entire families of possible features definitions as well as their statistical properties. For each time step we construct a hierarchical merge tree a highly compact, yet flexible feature representation. While this data structure is more than two orders of magnitude smaller than the raw simulation data it allows us to extract a set of feature for any given parameter selection in a post-processing step. Furthermore, we augment the trees with additional attributes making it possible to gather a large number of useful global, local, as well as conditional statistic that would otherwise be extremely difficult to compile. We also use this representation to create tracking graphs that describe the temporal evolution of the features over time. Our system provides a linked-view interface to explore the time-evolution of the graph interactively alongside the segmentation, thus making it possible to perform extensive data analysis in a very efficient manner. We demonstrate our framework

Peer-timo Bremer; Gunther H. Weber; Julien Tierny; Valerio Pascucci; Marcus S. Day; John B. Bell

2011-01-01T23:59:59.000Z

350

Automatic Segmentation of Whole Breast Using Atlas Approach and Deformable Image Registration  

SciTech Connect

Purpose: To compare interobserver variations in delineating the whole breast for treatment planning using two contouring methods. Methods and Materials: Autosegmented contours were generated by a deformable image registration-based breast segmentation method (DEF-SEG) by mapping the whole breast clinical target volume (CTVwb) from a template case to a new patient case. Eight breast radiation oncologists modified the autosegmented contours as necessary to achieve a clinically appropriate CTVwb and then recontoured the same case from scratch for comparison. The times to complete each approach, as well as the interobserver variations, were analyzed. The template case was also mapped to 10 breast cancer patients with a body mass index of 19.1-35.9 kg/m{sup 2}. The three-dimensional surface-to-surface distances and volume overlapping analyses were computed to quantify contour variations. Results: The median time to edit the DEF-SEG-generated CTVwb was 12.9 min (range, 3.4-35.9) compared with 18.6 min (range, 8.9-45.2) to contour the CTVwb from scratch (30% faster, p = 0.028). The mean surface-to-surface distance was noticeably reduced from 1.6 mm among the contours generated from scratch to 1.0 mm using the DEF-SEG method (p = 0.047). The deformed contours in 10 patients achieved 94% volume overlap before correction and required editing of 5% (range, 1-10%) of the contoured volume. Conclusion: Significant interobserver variations suggested a lack of consensus regarding the CTVwb, even among breast cancer specialists. Using the DEF-SEG method produced more consistent results and required less time. The DEF-SEG method can be successfully applied to patients with different body mass indexes.

Reed, Valerie K.; Woodward, Wendy A. [Department of Radiation Oncology, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Zhang Lifei [Department of Radiation Physics, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Strom, Eric A.; Perkins, George H.; Tereffe, Welela; Oh, Julia L.; Yu, T. Kuan [Department of Radiation Oncology, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Bedrosian, Isabelle [Department of Surgical Oncology, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Whitman, Gary J. [Department of Diagnostic Radiology, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Buchholz, Thomas A. [Department of Radiation Oncology, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Dong Lei [Department of Radiation Physics, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States)], E-mail: ldong@mdanderson.org

2009-04-01T23:59:59.000Z

351

CALTECH CORE-COLLAPSE PROJECT (CCCP) OBSERVATIONS OF TYPE II SUPERNOVAE: EVIDENCE FOR THREE DISTINCT PHOTOMETRIC SUBTYPES  

SciTech Connect

We present R-band light curves of Type II supernovae (SNe) from the Caltech Core-Collapse Project (CCCP). With the exception of interacting (Type IIn) SNe and rare events with long rise times, we find that most light curve shapes belong to one of three apparently distinct classes: plateau, slowly declining, and rapidly declining events. The last class is composed solely of Type IIb SNe which present similar light curve shapes to those of SNe Ib, suggesting, perhaps, similar progenitor channels. We do not find any intermediate light curves, implying that these subclasses are unlikely to reflect variance of continuous parameters, but rather might result from physically distinct progenitor systems, strengthening the suggestion of a binary origin for at least some stripped SNe. We find a large plateau luminosity range for SNe IIP, while the plateau lengths seem rather uniform at approximately 100 days. As analysis of additional CCCP data goes on and larger samples are collected, demographic studies of core-collapse SNe will likely continue to provide new constraints on progenitor scenarios.

Arcavi, Iair; Gal-Yam, Avishay; Yaron, Ofer [Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 76100 (Israel); Cenko, S. Bradley; Becker, Adam B. [Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States); Fox, Derek B. [Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802 (United States); Leonard, Douglas C. [Department of Astronomy, San Diego State University, San Diego, CA 92182 (United States); Moon, Dae-Sik [Department of Astronomy and Astrophysics, University of Toronto, Toronto, ON M5S 3H4 (Canada); Sand, David J. [Las Cumbres Observatory Global Telescope Network, Santa Barbara, CA 93117 (United States); Soderberg, Alicia M. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States); Kiewe, Michael [Department of Physics, University of Wisconsin, Madison, WI 53706 (United States); Scheps, Raphael [King's College, University of Cambridge, Cambridge CB2 1ST (United Kingdom); Birenbaum, Gali [12 Amos St, Ramat Chen, Ramat Gan 52233 (Israel); Chamudot, Daniel [20 Chen St, Petach Tikvah 49520 (Israel); Zhou, Jonathan, E-mail: iair.arcavi@weizmann.ac.il [101 Dunster Street, Box 398, Cambridge, MA 02138 (United States)

2012-09-10T23:59:59.000Z

352

Structurally Distinct Bacterial TBC-like GAPs Link Arf GTPase to Rab1 Inactivation to Counteract Host Defenses  

SciTech Connect

Rab GTPases are frequent targets of vacuole-living bacterial pathogens for appropriate trafficking of the vacuole. Here we discover that bacterial effectors including VirA from nonvacuole Shigella flexneri and EspG from extracellular Enteropathogenic Escherichia coli (EPEC) harbor TBC-like dual-finger motifs and exhibits potent RabGAP activities. Specific inactivation of Rab1 by VirA/EspG disrupts ER-to-Golgi trafficking. S. flexneri intracellular persistence requires VirA TBC-like GAP activity that mediates bacterial escape from autophagy-mediated host defense. Rab1 inactivation by EspG severely blocks host secretory pathway, resulting in inhibited interleukin-8 secretion from infected cells. Crystal structures of VirA/EspG-Rab1-GDP-aluminum fluoride complexes highlight TBC-like catalytic role for the arginine and glutamine finger residues and reveal a 3D architecture distinct from that of the TBC domain. Structure of Arf6-EspG-Rab1 ternary complex illustrates a pathogenic signaling complex that rewires host Arf signaling to Rab1 inactivation. Structural distinctions of VirA/EspG further predict a possible extensive presence of TBC-like RabGAP effectors in counteracting various host defenses.

Dong, Na; Zhu, Yongqun; Lu, Qiuhe; Hu, Liyan; Zheng, Yuqing; Shao, Feng (NIBS-China); (Zhejiang)

2012-10-10T23:59:59.000Z

353

How Do Recent Population Trends Matter to Climate Change?  

E-Print Network (OSTI)

. By ensuring couples are able to determine the size of their families, poverty and the depletion of natural change, as one of the root causes of greenhouse gas emissions, how population dynamics affect climate of total population size, research shows that changes in population composition (i.e. age, urban

Colorado at Boulder, University of

354

Identifying phylogeographic patterns and population history in Mediterranean rock ferns  

E-Print Network (OSTI)

, Q-matrix plots of K=2 through K=5 for 53 sampled populations All populations N>15 -30000 -25000 -20000 -15000 -10000 -5000 0 1 2 3 4 5 6 K L n P ( D ) 0 200 400 600 800 1000 1200 1400 1600 D e l t a K Populations n>15 excluding Valencia -14600...

Hunt, Harriet

2010-06-24T23:59:59.000Z

355

Dedicated breast CT: Fibroglandular volume measurements in a diagnostic population  

SciTech Connect

Purpose: To determine the mean and range of volumetric glandular fraction (VGF) of the breast in a diagnostic population using a high-resolution flat-panel cone-beam dedicated breast CT system. This information is important for Monte Carlo-based estimation of normalized glandular dose coefficients and for investigating the dependence of VGF on breast dimensions, race, and pathology. Methods: Image data from a clinical trial investigating the role of dedicated breast CT that enrolled 150 women were retrospectively analyzed to determine the VGF. The study was conducted in adherence to a protocol approved by the institutional human subjects review boards and written informed consent was obtained from all study participants. All participants in the study were assigned BI-RADS{sup Registered-Sign} 4 or 5 as per the American College of Radiology assessment categories after standard diagnostic work-up and underwent dedicated breast CT exam prior to biopsy. A Gaussian-kernel based fuzzy c-means algorithm was used to partition the breast CT images into adipose and fibroglandular tissue after segmenting the skin. Upon determination of the accuracy of the algorithm with a phantom, it was applied to 137 breast CT volumes from 136 women. VGF was determined for each breast and the mean and range were determined. Pathology results with classification as benign, malignant, and hyperplasia were available for 132 women, and were used to investigate if the distributions of VGF varied with pathology. Results: The algorithm was accurate to within {+-}1.9% in determining the volume of an irregular shaped phantom. The study mean ({+-} inter-breast SD) for the VGF was 0.172 {+-} 0.142 (range: 0.012-0.719). VGF was found to be negatively correlated with age, breast dimensions (chest-wall to nipple length, pectoralis to nipple length, and effective diameter at chest-wall), and total breast volume, and positively correlated with fibroglandular volume. Based on pathology, pairwise statistical analysis (Mann-Whitney test) indicated that at the 0.05 significance level, there was no significant difference in distributions of VGF without adjustment for age between malignant and nonmalignant breasts (p= 0.41). Pairwise comparisons of the distributions of VGF in increasing order of mammographic breast density indicated all comparisons were statistically significant (p < 0.002). Conclusions: This study used a different clinical prototype breast CT system than that in previous studies to image subjects from a different geographical region, and used a different algorithm for analysis of image data. The mean VGF estimated from this study is within the range reported in previous studies, indicating that the choice of 50% glandular weight fraction to represent an average breast for Monte Carlo-based estimation of normalized glandular dose coefficients in mammography needs revising. In the study, the distributions of VGF did not differ significantly with pathology.

Vedantham, Srinivasan; Shi Linxi; Karellas, Andrew; O'Connell, Avice M. [Department of Radiology, University of Massachusetts Medical School, Worcester, Massachusetts 01655 (United States); Department of Imaging Sciences, University of Rochester Medical Center, Rochester, New York 14642 (United States)

2012-12-15T23:59:59.000Z

356

Microphase separation in copolymers of hydrophilic PEG blocks and hydrophobic tyrosine-derived segments using simultaneous SAXS/WAXS/DSC  

Science Conference Proceedings (OSTI)

Hydration- and temperature-induced microphase separations were investigated by simultaneous small- and wide-angle X-ray scattering (SAXS and WAXS) and differential scanning calorimetry (DSC) in a family of copolymers in which hydrophilic poly(ethylene glycol) (PEG) blocks are inserted randomly into a hydrophobic polymer made of either desaminotyrosyl-tyrosine ethyl ester (DTE) or iodinated I{sub 2}DTE segments. Iodination of the tyrosine rings in I{sub 2}DTE increased the X-ray contrast between the hydrophobic and hydrophilic segments in addition to facilitating the study of the effect of iodination on microphase separation. The formation of phase-separated, hydrated PEG domains is of considerable significance as it profoundly affects the polymer properties. The copolymers of DTE (or I{sub 2}DTE) and PEG are a useful model system, and the findings presented here may be applicable to other PEG-containing random copolymers. In copolymers of PEG and DTE and I{sub 2}DTE, the presence of PEG depressed the glass transition temperature (T{sub g}) of the copolymer relative to the homopolymer, poly(DTE carbonate), and the DTE/I{sub 2}DTE segments hindered the crystallization of the PEG segments. In the dry state, at large PEG fractions (>70 vol%), the PEG domains self-assembled into an ordered structure with 14-18 nm distance between the domains. These domains gave rise to a SAXS peak at all temperatures in the iodinated polymers, but only above the T{sub g} in non-iodinated polymers, due to the unexpected contrast-match between the crystalline PEG domains and the glassy DTE segments. Irrespective of whether PEG was crystalline or not, immersion of these copolymers in water resulted in the formation of hydrated PEG domains that were 10-20 nm apart. Since both water and the polymer chains must be mobile for the phase separation to occur, the PEG domains disappeared when the water froze, and reappeared as the ice began to melt. This transformation was reversible, and showed hysteresis as did the melting of ice and freezing of the water incorporated into the polymer. PEG-water complexes and PEG-water eutectics were observed in WAXS and DSC scans, respectively.

Murthy, N.S.; Wang, W.; Kohn, J. (Rutgers); (Vermont)

2010-10-22T23:59:59.000Z

357

The distribution of stellar population age in galactic bars  

E-Print Network (OSTI)

Recent analysis of stellar populations in barred galaxies have focused on the spatial distribution of stellar population ages and metallicities. However, barred galaxies are complex objects where dynamical instabilities play a leading role in shaping any spatial distribution. The age distribution of stellar populations should thus be analyzed from the two points of view of stellar population evolution and dynamical secular evolution. Chemodynamical simulations of single barred galaxies with simple but realistic star formation and feedback recipes are used to produce face-on mass-weighted maps of stellar population ages. Luminosity-weighted maps in V-band are also displayed after calibrating the simulation with mass-to-light ratios provided by a synthesis population model. It is shown that inside a stellar bar two persistent diametrically opposed regions display a mean age lower than the surrounding average. These two low-age regions are due to the accumulation of young stellar populations trapped on elliptica...

Wozniak, H

2007-01-01T23:59:59.000Z

358

If They Like You, They Learn from You: How a Brief Weathercaster-Delivered Climate Education Segment Is Moderated by Viewer Evaluations of the Weathercaster  

Science Conference Proceedings (OSTI)

Local television (TV) weathercasters are a potentially promising source of climate education, in that weather is the primary reason viewers watch local TV news, large segments of the public trust TV weathercasters as a source of information about ...

Ashley A. Anderson; Teresa A. Myers; Edward W. Maibach; Heidi Cullen; Jim Gandy; Joe Witte; Neil Stenhouse; Anthony Leiserowitz

2013-10-01T23:59:59.000Z

359

If they like you, they learn from you: How a brief weathercaster-delivered climate education segment is moderated by viewer evaluations of the weathercaster  

Science Conference Proceedings (OSTI)

Local TV weathercasters are a potentially promising source of climate education in that weather is the primary reason viewers watch local TV news, large segments of the public trust TV weathercasters as a source of information about global warming,...

Ashley A. Anderson; Teresa A. Myers; Edward W. Maibach; Heidi Cullen; Jim Gandy; Joe Witte; Neil Stenhouse; Anthony Leiserowitz

360

Test method development for evaluating the freeze-thaw performance of segmental retaining wall blocks  

E-Print Network (OSTI)

Segmental retaining walls (SRW), typically constructed along highways, have grown in popularity over the past decade. Manufacturers of SRW blocks have estimated the service life of a properly constructed wall to be approximately 75 years. However, there have been reports of SRW systems failing after only five years in service. Suspected causes of the SRW failures are freeze-thaw damage while exposed to deicing salts sprayed by snow plows from highways. The current standard test method used for evaluating the freeze-thaw durability of SRW blocks has several drawbacks and does not accurately replicate environmental exposure field conditions. The objective of this research is to develop and assess a new standard test method for evaluating the freeze-thaw durability of SRW blocks that obtains reproducible results and offers sufficient information on the freeze-thaw performance for SRW block manufacturers and state highway agencies (SHAs). The research completed a preliminary proof of concept test for the new freezethaw test method developed using small, commercially available SRW blocks to mitigate potential problems and establish appropriate test parameters. The testing produced results of freeze-thaw degradation that followed the same modes of failure that has been discovered during field evaluations. After the proof of concept test was completed, a series of freeze-thaw tests were conducted using sets of SHA approved and non-SHA approved SRW blocks. Three different manufacturers� SRW blocks were evaluated. There was no significant freezethaw degradation of any of the blocks after 200 freeze-thaw cycles, so for two blocks, experiments were extended to 400 cycles using a twelve-hour freeze-thaw cycle. The modification of the test did not result in more rapid deterioration of the SRW blocks. The researchers found that the freeze-thaw durability test method developed herein is beneficial for determining the freeze-thaw performance of the lower quality specified blocks. The test method gives realistic results, which match typical deterioration modes that are common in field settings, in a timely manner. However, the test method for testing SHA quality SRW blocks takes longer times and may not be a reasonable test for such products.

Hoelscher, Aaron Kindall

2006-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

FACULTY DISTINCTIONS ENDOWED CHAIRS  

E-Print Network (OSTI)

. Selig Jr. Mr. and Mrs. Rankin M. Smith Jr. Lessie B. Smithgall Spencer Foundation Sun Microsystems Inc. and Mrs. Jefferson B. A. Knox Krell Institute Bernard Lanigan Jr. Greg Lanigan and Susan Lanigan Robert H n C L a s s o f 2 0 0 7 JAMES E. BUtLEr, Jr. | Columbus ChEStEr C. DAvENPort | Bethesda, Maryland J

362

Special population planner, version 4.0.  

SciTech Connect

Emergencies happen every day. Many are caused by storms or auto accidents and can be planned for, if not predicted. Emergencies resulting from natural hazards often affect a large number of people, and planning for them can be difficult, since knowledge of the needs of the people involved is generally unavailable. Emergencies resulting from accidents at industrial and military facilities can also be large scale in nature if people must be evacuated or sheltered in place. Federal planning for large scale emergencies is the responsibility of the Federal Emergency Management Agency (FEMA), which provides assistance to various emergency management agencies at the national, state and local level. More information about FEMA is available at http://www.fema.gov/. The purpose of the Special Population Planner (SPP) is to help emergency planners address the needs of persons with special needs. The exact definition of 'special population' is a policy decision. Policymakers have included a variety of groups in this term, such as persons with disabilities, those who do not have vehicles with which to evacuate, children who are unattended at times (latchkey children), and many others. The SPP was developed initially for the Alabama Emergency Management Agency as part of its Chemical Stockpile Emergency Preparedness Program (CSEPP), which aids emergency planning and preparedness in communities surrounding military installations across the United States where chemical weapons are stored pending their destruction under federal law. Like that specialized application, this open-source version contains a set of specialized Geographic Information System (GIS) tools to facilitate emergency planning on behalf of persons with special needs, regardless of how the term is defined. While the original SPP system was developed for emergency planning relating to chemical hazards, it can be applied to other threats as well. It is apparent from Hurricane Katrina and other natural and man-made disasters that many of the problems posed by emergency planning for a chemical weapons agent release are shared by other hazards as well. The notion that emergency planning shares common functions underlies the decision by FEMA to include the Chemical Stockpile Emergency Preparedness Program (CSEPP) in its 'all-hazards' planning approach. The CSEPP's official planning guidance operationalizes this approach by suggesting that state and local CSEPP emergency plans 'should be appended to the existing all-hazards emergency plan.' The SPP is programmed as a set of tools within an ESRI ArcMap 9.1 project. ArcMap is a component of both ESRI ArcGIS 9.1 and ESRI ArcView 9.1, and it provides a rich GIS user interface for viewing spatial and tabular data, analyzing it, and producing output reports and maps. This GIS interface has been augmented with the SPP tools for a user interface that provides custom functionality for emergency planning. The system as released also includes some hypothetical example records for special needs populations, facilities, resources, control points and sirens sufficient for showing how the system would work with real information. A GIS database is included with some publicly available example layers. The SPP is designed to support emergency planners as they address emergency management issues, and includes capabilities that support the collection and importing of data, the review of data in a spatial context, and GIS tools for emergency planning. The SPP system allows for the identification and categorization of response zones to allow for multiple levels of preparedness. An Immediate Response Zone (IRZ) might be designated as the area 0 to 10 miles from a facility where the response would be the most urgent. SPP can support more than one set of planning zones to accommodate different types of emergencies or the different jurisdictions of emergency response organizations. These areas can be delineated by any number of criteria that make sense for the area. An area like New Orleans might designate response zones based on the depth above/below s

Kuiper, J.; Tanzman, E.; Metz, W.

2007-03-26T23:59:59.000Z

363

Concurrent segmentation of the prostate on MRI and CT via linked statistical shape models for radiotherapy planning  

Science Conference Proceedings (OSTI)

Purpose: Prostate gland segmentation is a critical step in prostate radiotherapy planning, where dose plans are typically formulated on CT. Pretreatment MRI is now beginning to be acquired at several medical centers. Delineation of the prostate on MRI is acknowledged as being significantly simpler to perform, compared to delineation on CT. In this work, the authors present a novel framework for building a linked statistical shape model (LSSM), a statistical shape model (SSM) that links the shape variation of a structure of interest (SOI) across multiple imaging modalities. This framework is particularly relevant in scenarios where accurate boundary delineations of the SOI on one of the modalities may not be readily available, or difficult to obtain, for training a SSM. In this work the authors apply the LSSM in the context of multimodal prostate segmentation for radiotherapy planning, where the prostate is concurrently segmented on MRI and CT. Methods: The framework comprises a number of logically connected steps. The first step utilizes multimodal registration of MRI and CT to map 2D boundary delineations of the prostate from MRI onto corresponding CT images, for a set of training studies. Hence, the scheme obviates the need for expert delineations of the gland on CT for explicitly constructing a SSM for prostate segmentation on CT. The delineations of the prostate gland on MRI and CT allows for 3D reconstruction of the prostate shape which facilitates the building of the LSSM. In order to perform concurrent prostate MRI and CT segmentation using the LSSM, the authors employ a region-based level set approach where the authors deform the evolving prostate boundary to simultaneously fit to MRI and CT images in which voxels are classified to be either part of the prostate or outside the prostate. The classification is facilitated by using a combination of MRI-CT probabilistic spatial atlases and a random forest classifier, driven by gradient and Haar features. Results: The authors acquire a total of 20 MRI-CT patient studies and use the leave-one-out strategy to train and evaluate four different LSSMs. First, a fusion-based LSSM (fLSSM) is built using expert ground truth delineations of the prostate on MRI alone, where the ground truth for the gland on CT is obtained via coregistration of the corresponding MRI and CT slices. The authors compare the fLSSM against another LSSM (xLSSM), where expert delineations of the gland on both MRI and CT are employed in the model building; xLSSM representing the idealized LSSM. The authors also compare the fLSSM against an exclusive CT-based SSM (ctSSM), built from expert delineations of the gland on CT alone. In addition, two LSSMs trained using trainee delineations (tLSSM) on CT are compared with the fLSSM. The results indicate that the xLSSM, tLSSMs, and the fLSSM perform equivalently, all of them out-performing the ctSSM. Conclusions: The fLSSM provides an accurate alternative to SSMs that require careful expert delineations of the SOI that may be difficult or laborious to obtain. Additionally, the fLSSM has the added benefit of providing concurrent segmentations of the SOI on multiple imaging modalities.

Chowdhury, Najeeb; Toth, Robert; Chappelow, Jonathan; Kim, Sung; Motwani, Sabin; Punekar, Salman; Lin Haibo; Both, Stefan; Vapiwala, Neha; Hahn, Stephen; Madabhushi, Anant

2012-04-15T23:59:59.000Z

364

Magnetic Fields in Population III Star Formation  

DOE Green Energy (OSTI)

We study the buildup of magnetic fields during the formation of Population III star-forming regions, by conducting cosmological simulations from realistic initial conditions and varying the Jeans resolution. To investigate this in detail, we start simulations from identical initial conditions, mandating 16, 32 and 64 zones per Jeans length, and studied the variation in their magnetic field amplification. We find that, while compression results in some amplification, turbulent velocity fluctuations driven by the collapse can further amplify an initially weak seed field via dynamo action, provided there is sufficient numerical resolution to capture vortical motions (we find this requirement to be 64 zones per Jeans length, slightly larger than, but consistent with previous work run with more idealized collapse scenarios). We explore saturation of amplification of the magnetic field, which could potentially become dynamically important in subsequent, fully-resolved calculations. We have also identified a relatively surprising phenomena that is purely hydrodynamic: the higher-resolved simulations possess substantially different characteristics, including higher infall-velocity, increased temperatures inside 1000 AU, and decreased molecular hydrogen content in the innermost region. Furthermore, we find that disk formation is suppressed in higher-resolution calculations, at least at the times that we can follow the calculation. We discuss the effect this may have on the buildup of disks over the accretion history of the first clump to form as well as the potential for gravitational instabilities to develop and induce fragmentation.

Turk, Matthew J.; Oishi, Jeffrey S.; Abel, Tom; Bryan, Greg

2012-02-22T23:59:59.000Z

365

Cooperative spin decoherence and population transfer  

E-Print Network (OSTI)

An ensemble of multilevel atoms is a good candidate for a quantum information storage device. The information is encrypted in the collective ground state atomic coherence, which, in the absence of external excitation, is decoupled from the vacuum and therefore decoherence free. However, in the process of manipulation of atoms with light pulses (writing, reading), one inadvertently introduces a coupling to the environment, i.e. a source of decoherence. The dissipation process is often treated as an independent process for each atom in the ensemble, an approach which fails at large atomic optical depths where cooperative effects must be taken into account. In this paper, the cooperative behavior of spin decoherence and population transfer for a system of two, driven multilevel-atoms is studied. Not surprisingly, an enhancement in the decoherence rate is found, when the atoms are separated by a distance that is small compared to an optical wavelength; however, it is found that this rate increases even further for somewhat larger separations for atoms aligned along the direction of the driving field's propagation vector. A treatment of the cooperative modification of optical pumping rates and an effect of polarization swapping between atoms is also discussed, lending additional insight into the origin of the collective decay.

C. Genes; P. R. Berman

2006-01-30T23:59:59.000Z

366

Dusky dolphins of Kaikoura, New Zealand: behavioral effects of genetic sampling and analysis of population structure  

E-Print Network (OSTI)

Seasonal differences in group size, behavior, icrographics. distribution, and coloration patterns of dusky dolphins (Lacenorhynchus obscures) in Kaikoura, New Zealand, have led researchers to question whether "winter'' and "summer'' groups are temporally and behaviorally segregated into genetically distinct populations. Exfoliated skin samples were collected in Kaikoura from July 1997 to May 1998 for genetic analysis of 40 "winter'' and 40 "summer'' individuals via skin swab. A 473 base pair section of the mitochondrion DNA control region was amplified and sequenced for the 80 samples. Nucleotide and haplotype diversity were 0.16 and 0.98, respectively. AMOVA and phylogenetie analyses indicate "winter'' and "summer'' groups are not subdivided with respect to maternal lineages. Lack of subdivision between seasonal populations is further supported by: (1) demographic patterns determined from mismatch distribution analysis suggest New Zealand dusky dolphins underwent a population expansion in the Pleistocene; (2) current levels of diversity suggest the long-term effective population size has been large', (3) preliminary analysis of photo-identification data indicate individuals are present in Kaikoura both winter and summer; (4) comparison of 80 samples from Kaikoura to eight beach-east samples from locations throughout New Zealand reveal shared haplotypes between regions. Behavioral responses to sampling were recorded for 315 contacts and 48 controls. The number of pro-and pest-contact joyriders and sample time were used as indicators of group-level response to sampling. The behavioral state of dolphins prior to sampling or time of day did not affect responses to sampling. Small groups were found to be more sensitive to sampling. Dolphin groups appeared to habituate to sampling activities after the first hour spent sampling. Responses to sampling were mild with 18% showing no response to contact. The most frequent response was to move right or left of the bow. Thirty-three percent of dolphins returned to the bow within 10.8 [] 0.73 seconds. There was no significant difference between proportion of responses between treatment and control groups, suggesting a proportion of responses to sampling can be explained by normal behavior in the presence of a vessel.

Harlin, April Dawn

1999-01-01T23:59:59.000Z

367

The Chemical Enrichment History of the Magellanic Clouds Field Populations  

E-Print Network (OSTI)

We report the results of our project devoted to study the chemical enrichment history of the field population in the Magellanic Clouds using Ca II triplet spectroscopy.

R. Carrera; C. Gallart; A. Aparicio; E. Costa; E. Hardy; R. A. Mendez; N. E. D. Noel; R. Zinn

2008-09-24T23:59:59.000Z

368

Connectivity mechanisms in a population complex of coastal cod.  

E-Print Network (OSTI)

??In this thesis I have studied connectivity processes affecting the population structure of coastal cod on the Norwegian Skagerrak coast. I have focused on three… (more)

Espeland, Sigurd Heiberg

2010-01-01T23:59:59.000Z

369

Population shifts across U.S. regions affect overall heating ...  

U.S. Energy Information Administration (EIA)

Energy use in homes, commercial buildings, manufacturing, and transportation. Coal. ... The share of the U.S. population living in the coldest regions, ...

370

Urban aerosols harbor diverse and dynamic bacterial populations  

Urban aerosols harbor diverse and dynamic bacterial populations Eoin L. Brodie, Todd Z. DeSantis, Jordan P. Moberg Parker, Ingrid X. Zubietta, Yvette M. Piceno, and ...

371

Independent Scientific Advisory Board Human Population Impacts on  

E-Print Network (OSTI)

..................................................................................................................................................23 Chemical Effects ......................................................................................................................................52 Acquisition and Conversion of Water Rights that is expected to continue. Population growth is a primary reason for the conversion through increases in demand

372

Selective population of spin--orbit levels in the autoionization ...  

Science Conference Proceedings (OSTI)

Selective population of spin-orbit levels in the autoionization of a polyatomic ... individual spin-orbit components of the X 2111, ionic ground state fol ...

2010-08-19T23:59:59.000Z

373

Visualizing Diurnal Population Change in Urban Areas for Emergency Management  

SciTech Connect

There is an increasing need for a quick, simple method to represent diurnal population change in metropolitan areas for effective emergency management and risk analysis. Many geographic studies rely on decennial U.S. Census data that assume that urban populations are static in space and time. This has obvious limitations in the context of dynamic geographic problems. The U.S. Department of Transportation publishes population data at the transportation analysis zone level in fifteen-minute increments. This level of spatial and temporal detail allows for improved dynamic population modeling. This article presents a methodology for visualizing and analyzing diurnal population change for metropolitan areas based on this readily available data. Areal interpolation within a geographic information system is used to create twenty-four (one per hour) population surfaces for the larger metropolitan area of Salt Lake County, Utah. The resulting surfaces represent diurnal population change for an average workday and are easily combined to produce an animation that illustrates population dynamics throughout the day. A case study of using the method to visualize population distributions in an emergency management context is provided using two scenarios: a chemical release and a dirty bomb in Salt Lake County. This methodology can be used to address a wide variety of problems in emergency management.

Kobayashi, Tetsuo [University of Utah; Medina, Richard M [ORNL; Cova, Thomas [University of Utah

2011-01-01T23:59:59.000Z

374

Dust-acoustic Gardner solitons and double layers in dusty plasmas with nonthermally distributed ions of two distinct temperatures  

SciTech Connect

A rigorous theoretical investigation has been performed on dust-acoustic (DA) solitary structures in an unmagnetized dusty plasma, consisting of negatively charged mobile dust grains, Boltzmann distributed electrons, and nonthermally distributed ions of two distinct temperatures. The Korteweg-de Vries (K-dV), modified K-dV (mK-dV) and Gardner equations, and their solitary waves (SWs) and double layer (DL) (in case of Gardner equation) solutions are derived by using the reductive perturbation technique. The basic features of the DA Gardner solitons (GSs) and DLs are studied analytically as well as numerically. It has been observed that the GSs significantly differ from K-dV and mK-dV solitons, and only positive potential DLs exist in the system. It is also studied that two-temperature nonthermal ions significantly modify the nature and basic properties of the DA SWs. The present investigation can be very effective for understanding and studying the nonlinear characteristics of the DA waves in laboratory and space dusty plasmas.

Tasnim, I.; Mamun, A. A. [Department of Physics, Jahangirnagar University, Savar, Dhaka 1342 (Bangladesh)] [Department of Physics, Jahangirnagar University, Savar, Dhaka 1342 (Bangladesh); Masud, M. M. [Department of Physics, Jahangirnagar University, Savar, Dhaka 1342 (Bangladesh) [Department of Physics, Jahangirnagar University, Savar, Dhaka 1342 (Bangladesh); Department of Physics, Bangladesh University of Engineering and Technology (BUET), Dhaka (Bangladesh); Asaduzzaman, M. [Department of Physics, Jahangirnagar University, Savar, Dhaka 1342 (Bangladesh) [Department of Physics, Jahangirnagar University, Savar, Dhaka 1342 (Bangladesh); Department of Electronics and Communications Engineering, East West University, Aftabnagar, Dhaka 1212 (Bangladesh)

2013-03-15T23:59:59.000Z

375

The genus Nocardiopsis represents a phylogenetically coherent taxon and a distinct actinomycete lineage: proposal of Nocardiopsaceae fam. nov  

E-Print Network (OSTI)

The genus Nocardiopsis was shown to be phylogenetically coherent and to represent a distinct lineage within the radiation of the order Actinomycetales. The closest relatives of the genus Nocardiopsis are members of the genera Actinomadura, Thermomonospora, Streptosporangium, and Microtetraspora. The intrageneric structure of the genus Nucardiupsis is shown to consist of a highly related species group containing Nucardiupsis dassonvillei, Nocardiopsis alborubida, and Nocardiopsis antarctica and a second group of less highly related species comprising Nocardiopsis alba subs p. alba, Nocardiopsis alba subs p. prasina, and Nocardiopsis listeri. Nocardiopsis lucentensis occupies a position intermediate between the two species groups. The results of a 16s ribosomal DNA sequence analysis are generally consistent with the available chemotaxonomic, phenotypic, and DNA-DNA hybridization data. The phylogenetic position and the morpho- and chemotaxonomic properties of Nocardiopsis species support the creation of a family for the genus Nocardiopsis, Nocardiopsaceae fam. nov. Meyer described the genus Nocardiopsis for the species Actinomadura dassonvillei in 1976 on the basis of the morphological characteristics and cell wall type of this organism (21). The genus Nocardiopsis currently comprises seven validly described species, Nocardiopsis alborubidus, Nocardiopsis albus, Nocardiopsis antarcticus, Nocardiopsis dassonvillei, Nocardiopsis halophila,

Fred A. Rainey; Naomi Ward-rainey; Reiner M. Kroppenstedt

1996-01-01T23:59:59.000Z

376

Evidence for a distinct region causing a cat-like cry in patients with 5p deletions  

SciTech Connect

The cri-du-chat syndrome is a contiguous gene syndrome that results from a deletion of the short arm of chromosome 5 (5p). Patients present with a cat-like cry at birth, which is usually considered diagnostic of this syndrome. Additional features of the syndrome include failure to thrive, microcephaly, hypertelorism, epicanthal folds, hypotonia, and severe mental retardation. We report on four families in which patients with 5p deletions have only the characteristic cat-like cry, with normal to mildly delayed development. The precise locations of the deletions in each family were determined by FISH using lambda phage and cosmic clones. All of the deletion breakpoints map distal to a chromosomal region that is implicated with the facial features and severe mental and developmental delay in the cri-du-chat syndrome. DNA clones mapping in the chromosomal region associated with the cat-like cry feature will be useful diagnostic tools. They will allow for the distinction between 5p deletions that will result in the severe delay observed in most cri-du-chat syndrome patients and those deletions that result in the isolated cat-like cry feature, which is associated with a better prognosis. 19 refs., 5 figs., 1 tab.

Gersh, M.; Goodart, S.A.; Overhauser, J. [Thomas Jefferson Univ., Philadelphia, PA (United States)] [and others

1995-06-01T23:59:59.000Z

377

Magnetic-sublevel population and alignment for the excitation of H- and He-like uranium in relativistic collisions  

Science Conference Proceedings (OSTI)

We have measured the alignment of the L-shell magnetic substates following the K-shell excitation of hydrogen- and helium-like uranium in relativistic collisions with a low-Z gaseous target. Within this experiment, the population distribution for the L-shell magnetic sublevels has been obtained via an angular differential study of the decay photons associated with the subsequent deexcitation process. The results show a very distinctive behavior for the H- and He-like heavy systems. In particular, for K{yields}L excitation of He-like uranium, a considerable alignment of the L-shell levels was observed. A comparison of our experimental findings with recent rigorous relativistic predictions provides a good qualitative and a reasonable quantitative agreement, emphasizing the importance of the magnetic-interaction and many-body effects in the strong-field domain of high-Z ions.

Gumberidze, A. [ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum fuer Schwerionenforschung, D-64291 Darmstadt (Germany); FIAS Frankfurt Institute for Advanced Studies, D-60438 Frankfurt am Main (Germany); Fritzsche, S. [FIAS Frankfurt Institute for Advanced Studies, D-60438 Frankfurt am Main (Germany); GSI Helmholtzzentrum fuer Schwerionenforschung, D-64291 Darmstadt (Germany); Department of Physics, University of Oulu, P.O. Box 3000, FIN-90014 (Finland); Hagmann, S. [GSI Helmholtzzentrum fuer Schwerionenforschung, D-64291 Darmstadt (Germany); Institut fuer Kernphysik, University of Frankfurt, D-60486 Frankfurt (Germany); Kozhuharov, C.; Steck, M. [GSI Helmholtzzentrum fuer Schwerionenforschung, D-64291 Darmstadt (Germany); Ma, X. [Institute of Modern Physics, 730000 Lanzhou (China); Surzhykov, A. [GSI Helmholtzzentrum fuer Schwerionenforschung, D-64291 Darmstadt (Germany); Physikalisches Institut, Ruprecht-Karls-Universitaet, Heidelberg (Germany); Warczak, A. [Institute of Physics, Jagiellonian University, Krakow (Poland); Stoehlker, Th. [GSI Helmholtzzentrum fuer Schwerionenforschung, D-64291 Darmstadt (Germany); Physikalisches Institut, Ruprecht-Karls-Universitaet, Heidelberg (Germany); Helmholtz-Institut Jena, D-07743 Jena (Germany)

2011-10-15T23:59:59.000Z

378

Contemporary population structure and historical demography of sailfish (Istiophorus platypterus) in the Atlantic Ocean  

E-Print Network (OSTI)

The Atlantic sailfish (Istiophorus platypterus) is considered over-fished in U.S. waters. Furthermore, preliminary analyses of abundance indicate that a decline in biomass has occurred. While seminal studies have provided useful baseline data about intra- and inter-oceanic variation within sailfish, such studies may have underestimated the amount of genetic variability as a result of small sample sizes and the poor resolution of restriction fragment length polymorphism data. We used 263 base pairs from the hypervariable mitochondrial control region and fragment polymorphisms from five microsatellite loci to assess the contemporary population structure between eastern (n = 30) and western (n = 192) Atlantic sailfish stocks. We failed to reject the hypothesis of panmixia in Atlantic sailfish; however, higher levels of genetic variation were observed within the eastern Atlantic sailfish, and the nature of this difference needs to be investigated further. Having found no evidence of transatlantic differentiation, we pooled the Atlantic samples (n = 222) and compared them to a sample from the eastern Pacific (n = 22) and rejected the null hypothesis, concluding that sailfish from separate ocean basins do not share a common gene pool. We also found evidence of a recent sudden expansion of Clade I (the ubiquitous clade found in both Atlantic and Pacific Oceans) sailfish into the Atlantic that appears to have occurred between 164000 and 351000 years ago, coinciding with interglacial periods during the Pleistocene. This study also presents the first evidence of a recent sudden expansion of sailfish into the eastern Pacific, roughly 85400 to 173000 years ago, following a period when cooling in the eastern Pacific would have restricted the sailfish range to the warmer waters of the western Indo-Pacific. We emphasize that sailfish from this region of the Pacific are phenotypically distinct from those in the rest of the species' range and encourage further studies in order to determine if the eastern Pacific sailfish population should be managed as a separate stock.

Bangma, Jessica

2006-08-01T23:59:59.000Z

379

Three-dimensional multiphase segmentation of X-ray CT data of porous materials using a Bayesian Markov random field framework  

SciTech Connect

Advancements in noninvasive imaging methods such as X-ray computed tomography (CT) have led to a recent surge of applications in porous media research with objectives ranging from theoretical aspects of pore-scale fluid and interfacial dynamics to practical applications such as enhanced oil recovery and advanced contaminant remediation. While substantial efforts and resources have been devoted to advance CT technology, microscale analysis, and fluid dynamics simulations, the development of efficient and stable three-dimensional multiphase image segmentation methods applicable to large data sets is lacking. To eliminate the need for wet-dry or dual-energy scans, image alignment, and subtraction analysis, commonly applied in X-ray micro-CT, a segmentation method based on a Bayesian Markov random field (MRF) framework amenable to true three-dimensional multiphase processing was developed and evaluated. Furthermore, several heuristic and deterministic combinatorial optimization schemes required to solve the labeling problem of the MRF image model were implemented and tested for computational efficiency and their impact on segmentation results. Test results for three grayscale data sets consisting of dry glass beads, partially saturated glass beads, and partially saturated crushed tuff obtained with synchrotron X-ray micro-CT demonstrate great potential of the MRF image model for three-dimensional multiphase segmentation. While our results are promising and the developed algorithm is stable and computationally more efficient than other commonly applied porous media segmentation models, further potential improvements exist for fully automated operation.

Kulkarni, Ramaprasad; Tuller, Markus; Fink, Wolfgang; Wildschild, Dorthe (Oregon State U.); (Ariz)

2012-07-27T23:59:59.000Z

380

Computer Aided Composition System with Interactive Selective Population Climbing  

Science Conference Proceedings (OSTI)

In this work, we are developing the computer aided composition system. This system aids a person, which knows cellphone or background music of home page or software. This system is implemented with the interactive selective population climbing. We suppose ... Keywords: computer aided composition system, interactive selective population climbing, composing model

Hiroshi Hasui

2009-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Optimizing Epochal Evolutionary Search: Population-Size Dependent Theory  

Science Conference Proceedings (OSTI)

Epochal dynamics, in which long periods of stasis in an evolving population are punctuated by a sudden burst of change, is a common behavior in both natural and artificial evolutionary processes. We analyze the population dynamics for a class of fitness ... Keywords: error threshold, evolutionary search, genetic algorithm, marginal stability, optimization, statistical dynamics

Erik Van Nimwegen; James P. Crutchfield

2001-10-01T23:59:59.000Z

382

Ectropy of diversity measures for populations in Euclidean space  

Science Conference Proceedings (OSTI)

Measures to evaluate the diversity of a set of points (population) in Euclidean space play an important role in a variety of areas of science and engineering. Well-known measures are often used without a clear insight into their quality and many of them ... Keywords: Discrepancy, Ectropy, Klee's measure, Minimum spanning tree, Population diversity measure, Singular values

Bakir Lacevic; Edoardo Amaldi

2011-06-01T23:59:59.000Z

383

Quasi-random initial population for genetic algorithms  

Science Conference Proceedings (OSTI)

The selection of the initial population in a population-based heuristic optimizationmethod is important, since it affects the search for several iterations and often has an influence on the final solution. If no a priori information about the optima ... Keywords: Genetic algorithms, Global continuous optimization, Quasi-random sequences, Random numbers

H. Maaranen; K. Miettinen; M. M. Mäkelä

2004-06-01T23:59:59.000Z

384

Numerical calculation of the moments of the population balance equation  

Science Conference Proceedings (OSTI)

The combined CFD-PBM (population balance models) are computationally intensive, so a possibility is to calculate only a few moments of the probability density function (PDF) of the PBM minimizing the computational costs. However, this formulation results ... Keywords: least squares method, population balance equation, quadrature approximation

C. A. Dorao; H. A. Jakobsen

2006-11-01T23:59:59.000Z

385

Two structurally distinct {kappa}B sequence motifs cooperatively control LPS-induced KC gene transcription in mouse macrophages  

SciTech Connect

The mouse KC gene is an {alpha}-chemokine gene whose transcription is induced in mononuclear phagocytes by LPS. DNA sequences necessary for transcriptional control of KC by LPS were identified in the region flanking the transcription start site. Transient transfection analysis in macrophages using deletion mutants of a 1.5-kb sequence placed in front of the chloramphenicol acetyl transferase (CAT) gene identified an LPS-responsive region between residues -104 and +30. This region contained two {kappa}B sequence motifs. The first motif (position -70 to -59, {kappa}B1) is highly conserved in all three human GRO genes and in the mouse macrophage inflammatory protein-2 (MIP-2) gene. The second {kappa}B motif (position -89 to -78, {kappa}B2) was conserved only between the mouse and the rat KC genes. Consistent with previous reports, the highly conserved {kappa}B site ({kappa}B1) was essential for LPS inducibility. Surprisingly, the distal {kappa}B site ({kappa}B2) was also necessary for optimal response; mutation of either {kappa}B site markedly reduced sensitivity to LPS in RAW264.7 cells and to TNF-{alpha} in NIH 3T3 fibroblasts. Although both {kappa}B1 and {kappa}B2 sequences were able to bind members of the Rel homology family, including NF{kappa}B1 (P50), RelA (65), and c-Rel, the {kappa}B1 site bound these factors with higher affinity and functioned more effectively than the {kappa}B2 site in a heterologous promoter. These findings demonstrate that transcriptional control of the KC gene requires cooperation between two {kappa}B sites and is thus distinct from that of the three human GRO genes and the mouse MIP-2 gene. 71 refs., 8 figs.

Ohmori, Y.; Fukumoto, S.; Hamilton, T.A. [Cleveland Clinic Foundation, Cleveland, OH (United States)

1995-10-01T23:59:59.000Z

386

Fish recognition based on the combination between robust feature selection, image segmentation and geometrical parameter techniques using Artificial Neural Network and Decision Tree  

E-Print Network (OSTI)

We presents in this paper a novel fish classification methodology based on a combination between robust feature selection, image segmentation and geometrical parameter techniques using Artificial Neural Network and Decision Tree. Unlike existing works for fish classification, which propose descriptors and do not analyze their individual impacts in the whole classification task and do not make the combination between the feature selection, image segmentation and geometrical parameter, we propose a general set of features extraction using robust feature selection, image segmentation and geometrical parameter and their correspondent weights that should be used as a priori information by the classifier. In this sense, instead of studying techniques for improving the classifiers structure itself, we consider it as a black box and focus our research in the determination of which input information must bring a robust fish discrimination.The main contribution of this paper is enhancement recognize and classify fishes...

Alsmadi, Mutasem Khalil Sari; Noah, Shahrul Azman; Almarashdah, Ibrahim

2009-01-01T23:59:59.000Z

387

SECPOP90: Sector population, land fraction, and economic estimation program  

Science Conference Proceedings (OSTI)

In 1973 Mr. W. Athey of the Environmental Protection Agency wrote a computer program called SECPOP which calculated population estimates. Since that time, two things have changed which suggested the need for updating the original program - more recent population censuses and the widespread use of personal computers (PCs). The revised computer program uses the 1990 and 1992 Population Census information and runs on current PCs as {open_quotes}SECPOP90.{close_quotes} SECPOP90 consists of two parts: site and regional. The site provides population and economic data estimates for any location within the continental United States. Siting analysis is relatively fast running. The regional portion assesses site availability for different siting policy decisions; i.e., the impact of available sites given specific population density criteria within the continental United States. Regional analysis is slow. This report compares the SECPOP90 population estimates and the nuclear power reactor licensee-provided information. Although the source, and therefore the accuracy, of the licensee information is unknown, this comparison suggests SECPOP90 makes reasonable estimates. Given the total uncertainty in any current calculation of severe accidents, including the potential offsite consequences, the uncertainty within SECPOP90 population estimates is expected to be insignificant. 12 refs., 55 figs., 7 tabs.

Humphreys, S.L.; Rollstin, J.A.; Ridgely, J.N.

1997-09-01T23:59:59.000Z

388

Technology-Based Handling of Science Misconceptions: The GeoDist Tool on the Distinction of Greenhouse Effect and Ozone Depletion  

Science Conference Proceedings (OSTI)

The didactic utilization of the conceptual obstacles constitutes an alternative approach for the design of learning situations in science education, in order to produce a conceptual change and overcome them. Adopting this positive perspective, a relative ... Keywords: conceptual obstacles, GeoDist (Greenhouse Effect and Ozone Depletion Dis-tinction), Science Misconceptions

Sofia J. Hadjileontiadou; Theoxaris Vasilakoglou

2008-07-01T23:59:59.000Z

389

Brazil 1 Buzius and Salvador Brazil is one of those countries that have a very distinctive feel and a vivid image. Each one  

E-Print Network (OSTI)

Brazil 1 ­ Buzius and Salvador Brazil is one of those countries that have a very distinctive feel and a vivid image. Each one of us carries a detailed picture of Brazil in his mind, even without being there and carnival. The fantastic thing is that upon arriving to Brazil, one finds out that the real Brazil matches

Beimel, Amos

390

Cross-talk between non-genomic and genomic signalling pathways - Distinct effect profiles of environmental estrogens  

Science Conference Proceedings (OSTI)

Estrogen receptor (ER) transcriptional cross-talk after activation by 17{beta}-estradiol (E2) has been studied in considerable detail, but comparatively little is known about the ways in which synthetic estrogen-like chemicals, so-called xenoestrogens, interfere with these signalling pathways. E2 can stimulate rapid, non-genomic signalling events, such as activation of the Src/Ras/Erk signalling pathway. We investigated how activation of this pathway by E2, the estrogenic environmental contaminants o,p'-DDT, {beta}-HCH and p,p'-DDE, and epidermal growth factor (EGF) influences the expression of ER target genes, such as TFF1, ER, PR, BRCA1 and CCND1, and the proliferation of breast cancer cells. Despite commonalities in their estrogenicity as judged by cell proliferation assays, the environmental contaminants exhibited striking differences in their non-genomic and genomic signalling. The gene expression profiles of o,p'-DDT and {beta}-HCH resembled the effects observed with E2. In the case of {beta}-HCH this is surprising, considering its reported lack of affinity to the 'classical' ER. The expression profiles seen with p,p'-DDE showed some similarities with E2, but overall, p,p'-DDE was a fairly weak transcriptional inducer of TFF1, ER, PR, BRCA1 and CCND1. We observed distinct differences in the non-genomic signalling of the tested compounds. p,p'-DDE was unable to stimulate Src and Erk1/Erk2 activations. The effects of E2 on Src and Erk1/Erk2 phosphorylation were transient and weak when compared to EGF, but {beta}-HCH induced strong and sustained activation of all tested kinases. Transcription of TFF1, ER, PR and BRCA1 by E2, o,p'-DDT and {beta}-HCH could be suppressed partially by inhibiting the Src/Ras/Erk pathway with PD 98059. However, this was not seen with p,p'-DDE. Our investigations show that the cellular activities of estrogens and xenoestrogens are the result of a combination of extranuclear (non-genomic) and nuclear (genomic) events and highlight the need to take non-genomic effects and signalling cross-talk into consideration, when screening for environmental estrogens. Otherwise, chemicals devoid of ER affinity, such as {beta}-HCH, but with an effect profile otherwise similar to estrogens might be overlooked in safety testing.

Silva, Elisabete, E-mail: elisabete.silva@pharmacy.ac.u [Centre for Toxicology, School of Pharmacy, University of London, 29-39 Brunswick Square, London, WC1N 1AX (United Kingdom); Kabil, Alena; Kortenkamp, Andreas [Centre for Toxicology, School of Pharmacy, University of London, 29-39 Brunswick Square, London, WC1N 1AX (United Kingdom)

2010-06-01T23:59:59.000Z

391

The Nature of the Distinctive Microscopic Features in R5(SixGe1-x)4 Magnetic Refrigeration Materials  

Science Conference Proceedings (OSTI)

Magnetic refrigeration is a promising technology that offers a potential for high energy efficiency. The giant magnetocaloric effect of the R{sub 5}(Si{sub x}, Ge{sub 1-x}){sub 4} alloys (where R=rare-earth and O {le} x {le} 1), which was discovered in 1997, make them perfect candidates for magnetic refrigeration applications. In this study the microstructures of Gd{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4} alloys have been characterized using electron microscopy techniques, with the focus being on distinctive linear features first examined in 1999. These linear features have been observed in R{sub 5}(Si{sub x}, Ge{sub 1-x}){sub 4} alloys prepared from different rare-earths (Gd, Tb, Dy and Er) with different crystal structures (Gd{sub 5}Si{sub 4}-type orthorhombic, monoclinic and Gd{sub 5}Ge{sub 4}-type orthorhombic). Systematic scanning electron microscope studies revealed that these linear features are actually thin-plates, which grow along specific directions in the matrix material. The crystal structure of the thin-plates has been determined as hexagonal with lattice parameters a=b=8.53 {angstrom} and c=6.40 {angstrom} using selected area diffraction (SAD). Energy dispersive spectroscopy analysis, carried out in both scanning and transmission electron microscopes, showed that the features have a composition approximating to R{sub 5}(Si{sub x},Ge{sub 1-x}){sub 3}.phase. Orientation relationship between the matrix and the thin-plates has been calculated as [- 1010](1-211){sub p}//[010](10-2){sub m}. The growth direction of the thin plates are calculated as (22 0 19) and (-22 0 19) by applying the Ag approach of Zhang and Purdy to the SAD patterns of this system. High Resolution TEM images of the Gd{sub 5}Ge{sub 4} were used to study the crystallographic relationship. A terrace-ledge structure was observed at the interface and a 7{sup o} rotation of the reciprocal lattices with respect to each other, consistent with the determined orientation relationship, was noted. Both observations are consistent with the stated hypothesis that the growth direction of the thin-plates is parallel to an invariant line direction. Based on the terrace-ledge structure of the thin-plate interface a displacive-diffusional growth mechanism has been proposed to explain the rapid formation of the R{sub 5}(Si{sub x},Ge{sub 1-x}){sub 3} plates.

Ozan Ugurlu

2006-05-01T23:59:59.000Z

392

Optimal control of population transfer in Markovian open quantum systems  

E-Print Network (OSTI)

There has long been interest to control the transfer of population between specified quantum states. Recent work has optimized the control law for closed system population transfer by using a gradient ascent pulse engineer- ing algorithm [1]. Here, a spin-boson model consisting of two-level atoms which interact with the dissipative environment, is investigated. With opti- mal control, the quantum system can invert the populations of the quantum logic states. The temperature plays an important role in controlling popula- tion transfer. At low temperatures the control has active performance, while at high temperatures it has less erect. We also analyze the decoherence be- havior of open quantum systems with optimal population transfer control, and we find that these controls can prolong the coherence time. We hope that active optimal control can help quantum solid-state-based engineering.

Cuia, Wei; Pan, Yu

2010-01-01T23:59:59.000Z

393

Natural balance of graminicolous aphids in Pakistan. Survey of populations  

E-Print Network (OSTI)

Natural balance of graminicolous aphids in Pakistan. Survey of populations Sulaiman HAMID Sind Sugar Industry Research Institute, 14-A, Latifabad III, Hyderabad Sind, Pakistan SUMMARY Aphids attacking gramineous crops were studied in seven climatically and ecologically different regions of Pakistan

Recanati, Catherine

394

Optimal control of population transfer in Markovian open quantum systems  

E-Print Network (OSTI)

There has long been interest to control the transfer of population between specified quantum states. Recent work has optimized the control law for closed system population transfer by using a gradient ascent pulse engineer- ing algorithm [1]. Here, a spin-boson model consisting of two-level atoms which interact with the dissipative environment, is investigated. With opti- mal control, the quantum system can invert the populations of the quantum logic states. The temperature plays an important role in controlling popula- tion transfer. At low temperatures the control has active performance, while at high temperatures it has less erect. We also analyze the decoherence be- havior of open quantum systems with optimal population transfer control, and we find that these controls can prolong the coherence time. We hope that active optimal control can help quantum solid-state-based engineering.

Wei Cui; Zairong Xi; Yu Pan

2010-04-24T23:59:59.000Z

395

Observation of inverted population levels in the FM-1 Spherator  

DOE Green Energy (OSTI)

Inversions in the populations of excited levels in hydrogen and HeII were observed in the FM-1 Spherator. The inversion increases strongly as the ratio of the decay time of the electron temperature to the decay time of the electron density was decreased. Time dependent numerical calculations of the populations were in good agreement with the experimental measurements. More general calculations for high Z hydrogen-like ions are discussed.

Suckewer, S.; Hawryluk, R. J.; Okabayashi, M.; Schmidt, J. A.

1976-04-01T23:59:59.000Z

396

Population analysis relative to geothermal energy development, Imperial County, California  

DOE Green Energy (OSTI)

The historical and current population characteristics of Imperial County, California, are examined. These include vital rates, urbanization, town sizes, labor force composition, income, utility usage, and ethnic composition. Inferences are drawn on some of the important social and economic processes. Multivariate statistical analysis is used to study present relationships between variables. Population projections for the County were performed under historical, standard, and geothermal projection assumptions. The transferability of methods and results to other geothermal regions anticipating energy development is shown. (MHR)

Pick, J.B.; Jung, T.H.; Butler, E.

1977-01-01T23:59:59.000Z

397

Genetic analysis in the Collaborative Cross breeding population  

Science Conference Proceedings (OSTI)

Genetic reference populations in model organisms are critical resources for systems genetic analysis of disease related phenotypes. The breeding history of these inbred panels may influence detectable allelic and phenotypic diversity. The existing panel of common inbred strains reflects historical selection biases, and existing recombinant inbred panels have low allelic diversity. All such populations may be subject to consequences of inbreeding depression. The Collaborative Cross (CC) is a mouse reference population with high allelic diversity that is being constructed using a randomized breeding design that systematically outcrosses eight founder strains, followed by inbreeding to obtain new recombinant inbred strains. Five of the eight founders are common laboratory strains, and three are wild-derived. Since its inception, the partially inbred CC has been characterized for physiological, morphological, and behavioral traits. The construction of this population provided a unique opportunity to observe phenotypic variation as new allelic combinations arose through intercrossing and inbreeding to create new stable genetic combinations. Processes including inbreeding depression and its impact on allelic and phenotypic diversity were assessed. Phenotypic variation in the CC breeding population exceeds that of existing mouse genetic reference populations due to both high founder genetic diversity and novel epistatic combinations. However, some focal evidence of allele purging was detected including a suggestive QTL for litter size in a location of changing allele frequency. Despite these inescapable pressures, high diversity and precision for genetic mapping remain. These results demonstrate the potential of the CC population once completed and highlight implications for development of related populations. Supplementary material consists of Supplementary Table 1 Phenotypic means, variances, ranges and heritabilities for all traits and generations, Supplementary Table 2, all phenotypic values, Supplementary Table 3, multiple QTL mapping.

Philip, Vivek [University of Tennessee, Knoxville (UTK); Sokoloff, Greta [ORNL; Ackert-Bicknell, Cheryl [Jackson Laboratory, The, Bar Harbor, ME; Striz, Martin [University of Kentucky, Lexington; Branstetter, Lisa R [ORNL; Beckmann, Melissa [ORNL; Spence, Jason S [ORNL; Jackson, Barbara L [ORNL; Galloway, Leslie D [ORNL; Barker, Gene [ORNL; Wymore, Ann M [Oak Ridge National Laboratory (ORNL); Hunsicker, Patricia R [ORNL; Durtschi, David W [University of Kentucky, Lexington; Shaw, Ginger S [University of Kentucky, Lexington; Shinpock, Sarah G [ORNL; Manly, Kenneth F [University of Kentucky, Lexington; Miller, Darla R [ORNL; Donahue, Kevin [University at Buffalo, NY; Culiat, Cymbeline T [ORNL; Churchill, Gary A [Jackson Laboratory, The, Bar Harbor, ME; Lariviere, William R [University of Pittsburgh; Palmer, Abraham [University of Chicago; O'Hara, Bruce [University of Kentucky; Voy, Brynn H [ORNL; Chesler, Elissa J [ORNL

2011-01-01T23:59:59.000Z

398

Capacity Planning, Power Quality, Reliability, and Availability for Internet Facilities: Volume 1: Digital Society Evolution, Issues Facing Stakeholders, and E-Commerce Market Segments  

Science Conference Proceedings (OSTI)

This two-volume report discusses the strategic and technical issues related to energy capacity planning, power quality, reliability, and availability for Internet facilities. Volume One describes the digital economy and introduces the power issues facing suppliers and consumers in e-commerce market segments. Volume Two addresses facility characteristics, planning stage questions, defining R & D requirements, and applications issues for Internet facilities.

2000-12-14T23:59:59.000Z

399

Calculation of the parameters of the X-ray diffraction station with adaptive segmented optics on the side beam from the wiggler of the Sibir'-2 storage ring  

Science Conference Proceedings (OSTI)

The mounting of an X-ray diffraction station on the side beam of a 19-pole superconducting wiggler makes it possible not only to use the central synchrotron radiation beam with a wavelength of 0.5 Angstrom-Sign , but also to solve problems requiring softer X rays at a synchrotron radiation (SR) intensity exceeding that for the beams from the bending magnet. A numerical simulation of the formation of photon beams from a source and their transmission through the elements of the station (and through the station as a whole) allows one to calculate the parameters of the station, compare it with the existing analogs, determine its potential and actual efficiency of its elements, and estimate the adjustment quality. A numerical simulation of the SR source on the side beam from the wiggler and the focusing channel (segmented condenser mirror, monochromator with sagittal focusing by the segmented second crystal, and segmented focusing mirror) has been performed. The sizes of the focus and the divergence of rays in it are determined with allowance for the finite sizes of segments. The intensity of radiation with a wavelength {lambda} = 1.0 Angstrom-Sign in the focus is determined taking into account the loss in the SR extraction channel and in the focusing channel. The values of the critical wavelength for the side beam from the wiggler and the wavelength resolution are calculated. The intensities in the X-ray diffraction pattern and its angular resolution are found.

Molodenskii, D. S.; Kheiker, D. M., E-mail: kheiker@ns.crys.ras.ru [Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation); Korchuganov, V. N. [National Research Center Kurchatov Institute (Russian Federation); Konoplev, E. E. [NPO Luch (Russian Federation); Dorovatovskii, P. V. [National Research Center Kurchatov Institute (Russian Federation)

2012-05-15T23:59:59.000Z

400

An estimate for the sum of a Dirichlet series in terms of the minimum of its modulus on a vertical line segment  

Science Conference Proceedings (OSTI)

The behaviour of the sum of an entire Dirichlet series is analyzed in terms of the minimum of its modulus on a system of vertical line segments. Also a more general problem, connected with the Polya conjecture is posed and solved. It concerns the minimum modulus of an entire function with Fabri gaps and its growth along curves going to infinity. Bibliography: 33 titles.

Gaisin, Ahtyar M; Rakhmatullina, Zhanna G

2011-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

CA manager framework: creating customised workflows for ontology population and semantic annotation  

Science Conference Proceedings (OSTI)

We present the Content Augmentation Manager Framework for creating various adapted workflows for ontology population and semantic annotation based on Semantic Web recommendations and UIMA precepts. This framework supports ontology population from text ... Keywords: ontology population, semantic annotation

Danica Damljanovic; Florence Amardeilh; Kalina Bontcheva

2009-09-01T23:59:59.000Z

402

Population genomics: Whole-genome analysis of polymorphism and divergence in Drosophila simulans  

E-Print Network (OSTI)

PLoS BIOLOGY Population Genomics: Whole-Genome Analysis ofwww.plosbiology.org Population Genomics of D. simulans Table11 | e310 Population Genomics of D. simulans Table S15. GO

2007-01-01T23:59:59.000Z

403

Four-dimensional image-based treatment planning: Target volume segmentation and dose calculation in the presence of respiratory motion  

Science Conference Proceedings (OSTI)

Purpose: To describe approaches to four-dimensional (4D) treatment planning, including acquisition of 4D-CT scans, target delineation of spatio-temporal image data sets, 4D dose calculations, and their analysis. Methods and Materials: The study included patients with thoracic and hepatocellular tumors. Specialized tools were developed to facilitate visualization, segmentation, and analysis of 4D-CT data: maximum intensity volume to define the extent of lung tumor motion, a 4D browser to examine and dynamically assess the 4D data sets, dose calculations, including respiratory motion, and deformable registration to combine the dose distributions at different points. Results: Four-dimensional CT was used to visualize and quantitatively assess respiratory target motion. The gross target volume contours derived from light breathing scans showed significant differences compared with those extracted from 4D-CT. Evaluation of deformable registration using difference images of original and deformed anatomic maps suggested the algorithm is functionally useful. Thus, calculation of effective dose distributions, including respiratory motion, was implemented. Conclusion: Tools and methods to use 4D-CT data for treatment planning in the presence of respiratory motion have been developed and applied to several case studies. The process of 4D-CT-based treatment planning has been implemented, and technical barriers for its routine use have been identified.

Rietzel, Eike [Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (United States) and Abteilung Biophysik, Gesellschaft fuer Schwerionenforschung, Darmstadt (Germany)]. E-mail: eike@rietzel.net; Chen, George T.Y. [Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (United States); Choi, Noah C. [Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (United States); Willet, Christopher G. [Department of Radiation Oncology, Massachusetts General Hospital, Harvard Medical School, Boston, MA (United States)

2005-04-01T23:59:59.000Z

404

Energy Conservation Through Demand-Side Management (DSM): A Methodology to Characterize Energy Use Among commercial Market Segments  

E-Print Network (OSTI)

Managing energy demand can be beneficial for both the energy consumer and the energy supplier. By reducing energy use, the consumer reduces operating costs and improves production efficiency and competitiveness. Similarly, the supplier may reduce the need for costly capacity expansion and wholesale power purchasing, especially if energy reductions occur during peak loading conditions. Energy reductions may also lessen global climate change and reduce many other consequences of fossil-fuel energy use. The following research highlights a methodology to characterize energy use and optimize a DSM program for different types of commercial buildings. Utilizing publicly available records, such as utility billing data and property tax records, the diverse commercial building market was characterized. The commercial building types were matched to relevant submarkets of the North American Industry Classification System (NAICS). These sources were combined to prioritize building type submarket energy use intensity (kWh/sf/yr), load factor and many other energy use characteristics for each market segment. From this information, lower tier performers in each NAICS submarket can be identified and appropriate DSM alternatives selected specific to each.

Grosskopf, K. R.; Oppenheim, P.; Barclay, D

2007-01-01T23:59:59.000Z

405

Population Physiologically-Based Pharmacokinetic Modeling for the Human  

NLE Websites -- All DOE Office Websites (Extended Search)

Population Physiologically-Based Pharmacokinetic Modeling for the Human Population Physiologically-Based Pharmacokinetic Modeling for the Human Lactational Transfer of PCB 153 with Consideration of Worldwide Human Biomonitoring Results Title Population Physiologically-Based Pharmacokinetic Modeling for the Human Lactational Transfer of PCB 153 with Consideration of Worldwide Human Biomonitoring Results Publication Type Journal Article Year of Publication 2008 Authors Redding, Laurel E., Michael D. Sohn, Thomas E. McKone, Shu-Li Wang, Dennis P. H. Hsieh, and Raymond S. H. Yang Journal Environmental Health Perspectives Volume 116 Issue 12 Pagination 1629-1634 Keywords bayesian inference, body burden, environmental chemistry, exposure & risk group, human milk biomonitoring, indoor environment department, lactational transfer, pcb 153, physiologically-based pharmacokinetic modeling, pollutant fate and transport modeling, poly-chlorinated biphenyls, reverse dosimetry

406

Session: What do we know about cumulative or population impacts  

DOE Green Energy (OSTI)

This session at the Wind Energy and Birds/Bats workshop consisted of a panel discussion followed by a discussion/question and answer period. The panelists were Paul Kerlinger, Curry and Kerlinger, LLC, Al Manville, U.S. Fish and Wildlife Service, and Bill Kendall, US Geological Service. The panel addressed the potential cumulative impacts of wind turbines on bird and bat populations over time. Panel members gave brief presentations that touched on what is currently known, what laws apply, and the usefulness of population modeling. Topics addressed included which sources of modeling should be included in cumulative impacts, comparison of impacts from different modes of energy generation, as well as what research is still needed regarding cumulative impacts of wind energy development on bird and bat populations.

Kerlinger, Paul; Manville, Al; Kendall, Bill

2004-09-01T23:59:59.000Z

407

All-optical reversible logic gate via adiabatic population transfer  

E-Print Network (OSTI)

The Toffoli gate is an essential logic element, which permits implementation of a reversible processor. It is of relevance both for classical as well as quantum logics. We propose and theoretically study all-optical implementations of three-bit and four-bit Toffoli gates by application of adiabatic population transfer techniques. For a three-bit Toffoli gate we use variants of stimulated Raman adiabatic passage (STIRAP) processes in a $\\Lambda$-type level scheme, driven by two laser pulses at sufficiently large detunings. For the implementation of a four-bit Toffoli gate, we apply reversible adiabatic population transfer in five-level quantum systems, interacting with three laser pulses. We demonstrate correct all-optical implementation of the truth table of three-bit and four-bit Toffoli gates. Moreover, we derive conditions for adiabatic evolution of the population dynamics and robust operation of the gates.

G. Grigoryan; V. Chaltykyan; E. Gazazyan; O. Tikhova; T. Halfmann

2013-06-10T23:59:59.000Z

408

"Table HC15.13 Lighting Usage Indicators by Four Most Populated...  

U.S. Energy Information Administration (EIA) Indexed Site

3 Lighting Usage Indicators by Four Most Populated States, 2005" " Million U.S. Housing Units" ,"Housing Units (millions)","Four Most Populated States" "Lighting Usage...

409

Population shifts across U.S. regions affect overall heating and ...  

U.S. Energy Information Administration (EIA)

Since the nation's founding, the population of the United States has migrated westward. The advent of air conditioning nearly a century ago contributed to population ...

410

Table D1. Population, U.S. Gross Domestic Product, and ...  

U.S. Energy Information Administration (EIA)

Table D1. Population, U.S. Gross Domestic Product, and Implicit Price Deflator, 1949-2011: Year: Population: U.S. Gross Domestic Product: United States 1

411

Population and conservation genomics of forest trees: seeing the forest for the trees  

E-Print Network (OSTI)

DB, Kremer A: Forest tree genomics: Growing resources andPopulation and conservation genomics of forest trees: seeingPopulation and conservation genomics of forest trees: seeing

Eckert, Andrew

2011-01-01T23:59:59.000Z

412

Diechmann U: Methodologies to Improve Global Population Estimates  

E-Print Network (OSTI)

This paper discusses some of the technical issues involved in the development of a georeferenced population database, including urban extents, currently being developed by CIESIN and partner organizations, using ArcGIS. The database will be made available as three separate data products: i) human settlements database (points), ii) urban extents (polygons) derived from satellite imagery and additional geographic data sources (such as DCW), and iii) urban-rural surface (grid). To produce the urban-rural surfaces, we developed a mass-conserving algorithm that reallocates people into urban areas, within each administrative unit, providing a more accurate representation of the distribution of human population. 1.

Francesca Pozzi; Deborah Balk; Gregory Yetman; Andy Nelson; Uwe Deichmann

2004-01-01T23:59:59.000Z

413

members of the Biological Review Team  

E-Print Network (OSTI)

i Acknowledgements This document was prepared at the request of the Regional Office of the National Marine Fisheries Service. The purpose is to review the status of Lynn Canal herring and to determine if Lynn Canal herring are a distinct population segment of Pacific herring as defined by the

Mark G. Carls; Scott W. Johnson; Mandy R. Lindeberg; A. Darcie Neff; Pat M. Harris; Auke Bay Laboratories; Robin Waples; Mark G. Carls; Jeffrey T. Fujioka; Richard G. Gustafson; Scott W. Johnson; Erika Phillips; Stanley D. Rice; Johanna Vollenweider; Robin S. Waples; Bruce L. Wing; Jamie N. Womble

2008-01-01T23:59:59.000Z

414

ZipperDB: Predictions of Fibril-forming Segments within Proteins Identified by the 3D Profile Method (from the UCLA-DOE Institute for Genomics and Proteomics)  

DOE Data Explorer (OSTI)

ZipperDB contains predictions of fibril-forming segments within proteins identified by the 3D Profile Method. The UCLA-DOE Institute for Genomics and Proteomics has analyzed over 20,000 putative protein sequences for segments with high fibrillation propensity that could form a "steric zipper"ùtwo self-complementary beta sheets, giving rise to the spine of an amyloid fibril. The approach is unique in that structural information is used to evaluate the likelihood that a particular sequence can form fibrils. [copied with edits from http://www.doe-mbi.ucla.edu/]. In addition to searching the database, academic and non-profit users may also submit their protein sequences to the database.

Goldschmidt, L.; Teng, P.K.; Riek, R.; Eisenberg, D.

415

Food web complexity and chaotic population Gregor F. Fussmann1  

E-Print Network (OSTI)

REPORT Food web complexity and chaotic population dynamics Gregor F. Fussmann1 * and Gerd Heber2 1 their complexity increases. We determined the dynamical stability of a universe of mathematical, nonlinear food web, chaotic dynamics increases with the number of trophic levels in a food web but decreases with the degree

Fussman, Gregor

416

Distribution et association des inversions chromosomiques dans trois populations naturelles  

E-Print Network (OSTI)

, one on each of the major autosome arms, are cosmopolitan. The Tunisian popu- lation shows the greatest distribution of cosmopolitan inversions between individuals of the French population is observed in the Tunisian lines. Linkage disequilibrium exists between pair of cosmopolitan inversions of the #12;second

Recanati, Catherine

417

SOME EFFECTS OF DREDGING ON POPULATIONS OF MACROBENTHIC ORGANISMS  

E-Print Network (OSTI)

populations were reduced, but there was no evidence of mass mortality. Recovery of biomass in the channel) and Reish (1959) established that 1.5 mm and 1.4 mm mesh sieves recovered 90% of the biomass from. The data were expressed as number of organ- isms/wet weight/dry weight (biomass) per m2 of substratum

418

Population Files for use with CAP88 at Los Alamos  

Science Conference Proceedings (OSTI)

CAP88 (Clean Air Act Assessment Package 1988) is a computer model developed for the US Environmental Protection Agency to assess the potential dose from radionuclide emissions to air and to demonstrate compliance with the Clean Air Act. It has options to calculate either individual doses, in units of mrem, or a collective dose, also called population dose, in units of person-rem. To calculate the collective dose, CAP88 uses a population file such as LANL.pop, that lists the number of people in each sector (N, NNE, NE, etc.) as a function of distance (1 to 2 km, etc.) out to a maximum radius of 80 km. Early population files are described in the Los Alamos National Laboratory (LANL) Environmental Reports for 1985 (page 14) and subsequent years. LA-13469-MS describes a population file based on the 1990 census. These files have been updated several times, most recently in 2006 for CAP88 version 3. The 2006 version used the US census for 2000. The present paper describes the 2012 updates, using the 2010 census.

McNaughton, Michael W [Los Alamos National Laboratory; Brock, Burgandy R [Los Alamos National Laboratory

2012-07-10T23:59:59.000Z

419

Electron Subband Population and Mobility in Asymmetric Coupled Quantum Wells  

Science Conference Proceedings (OSTI)

The electron subband energy and population engineering by inserting a thin AlGaAs barrier inside a GaAs quantum well (QW) is considered. The specific voltage across the coupled QW's which arises due to the asymmetric deformation of electron wave function ... Keywords: electron-phonon scattering in a quantum well, photovoltaic effect

Juras Pozela; Karolis Pozela; Vida Juciene And Audrius Namajunas

1998-03-01T23:59:59.000Z

420

Molecular pulses: Population inversion with positively chirped short pulses  

E-Print Network (OSTI)

Molecular pulses: Population inversion with positively chirped short pulses Jianshu Cao of molecular systems can be achieved with intense positively chirped broadband laser pulses. To provide and a four-level model is designed to demonstrate for molecular systems the correlation between the sign

Cao, Jianshu

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Periodic solution of single population models on time scales  

Science Conference Proceedings (OSTI)

By using the calculus on time scales, we study and establish criterion for the existence of periodic solutions of some scalar dynamical equations on time scales. The existence of periodic solutions for some concrete well-known single population models ... Keywords: Coincidence degree theory, Logistic equations, Periodic solutions, Time scales

Jimin Zhang; Meng Fan; Huaiping Zhu

2010-08-01T23:59:59.000Z

422

RESEARCH ARTICLE Modeling population connectivity by ocean currents,  

E-Print Network (OSTI)

this connectivity between distant populations is key to their effective conservation and management. For many marine between distant patches of suitable habitat. Recent work has focused on the biophysics of marine larval illustrate how this connectivity can be analyzed using graph theory--an effective approach for exploring

Queensland, University of

423

Aeration Due to Breaking Waves. Part I: Bubble Populations  

Science Conference Proceedings (OSTI)

The population of bubbles produced by breaking waves in (10 m) winds of up to 12 m s?1 is analyzed using calibrated images from a vertical pencil-beam sonar system placed on the seabed near the Dutch coast. The structure in the images is ...

A. Graham; D. K. Woolf; A. J. Hall

2004-05-01T23:59:59.000Z

424

Binary populations and stellar dynamics in young clusters  

E-Print Network (OSTI)

We first summarize work that has been done on the effects of binaries on theoretical population synthesis of stars and stellar phenomena. Next, we highlight the influence of stellar dynamics in young clusters by discussing a few candidate UFOs (unconventionally formed objects) like intermediate mass black holes, Eta Carinae, Zeta Puppis, Gamma Velorum and WR 140.

D. Vanbeveren; H. Belkus; J. Van Bever; N. Mennekens

2008-01-17T23:59:59.000Z

425

Binary populations and stellar dynamics in young clusters  

E-Print Network (OSTI)

We first summarize work that has been done on the effects of binaries on theoretical population synthesis of stars and stellar phenomena. Next, we highlight the influence of stellar dynamics in young clusters by discussing a few candidate UFOs (unconventionally formed objects) like intermediate mass black holes, Eta Carinae, Zeta Puppis, Gamma Velorum and WR 140.

Vanbeveren, D; Van Bever, J; Mennekens, N

2008-01-01T23:59:59.000Z

426

Modelling life cycle and population dynamics of Nostocales (cyanobacteria)  

Science Conference Proceedings (OSTI)

Cyanobacteria of the order Nostocales found in lakes in temperate regions are generally assumed to benefit from climate change. To predict their future development under varying environmental conditions, we developed a mathematical model that simulates ... Keywords: Cylindrospermopsis raciborskii, Hasse diagram, Life cycle, Nostocales, Population dynamics, Shallow lake

K. D. Jöhnk; R. Brüggemann; J. Rücker; B. Luther; U. Simon; B. Nixdorf; C. Wiedner

2011-05-01T23:59:59.000Z

427

A Simulation Study of the Lithium Ion Transport Mechanism in Ternary Polymer Electrolytes - The Critical Role of the Segmental Mobility  

E-Print Network (OSTI)

We present an extensive molecular dynamics (MD) simulation study of the lithium ion transport in ternary polymer electrolytes consisting of poly(ethylene oxide) (PEO), lithium-bis(trifluoromethane)sulfonimide (LiTFSI) and the ionic liquid N-methyl-N-propylpyrrolidinium bis(trifluoromethane)sulfonimide (PYR13TFSI). In particular, we focus on two different strategies by which the ternary electrolytes can be devised, namely by (a) adding the ionic liquid to PEO20LiTFSI, and (b) substituting the PEO chains in PEO20LiTFSI by the ionic liquid. In order to grasp the changes of the overall lithium transport mechanism, we employ an analytical, Rouse-based cation transport model (Maitra et al., Phys. Rev. Lett., 2007, 98, 227802), which has originally been devised for binary PEO-based electrolytes. This model distinguishes three different microscopic transport mechanisms, each quantified by an individual time scale. In the course of our analysis, we extend this mathematical description to account for an entirely new transport mechanism, namely the TFSI-supported diffusion of lithium ions decoupled from the PEO chains, which emerges for certain stoichiometries. We find that the segmental mobility plays a decisive role in PEO-based polymer electrolytes. That is, whereas the addition of the ionic liquid to PEO20LiTFSI plasticizes the polymer network and thus also increases the lithium diffusion, the amount of free, mobile ether oxygens reduces when substituting the PEO chains by the ionic liquid, which compensates the plasticizing effect. In total, our observations allow us to formulate some general principles about the lithium ion transport mechanism in ternary polymer electrolytes. Moreover, our insights also shed light on recent experimental observations (Joost et al., Electrochim. Acta, 2012, 86, 330).

Diddo Diddens; Andreas Heuer

2012-11-14T23:59:59.000Z

428

Image segmentation based measurements  

Science Conference Proceedings (OSTI)

... Additionally, different cell lines can have different physical ... The main motivation of this work is to address ... An example of a live cell phase contrast ...

2013-04-16T23:59:59.000Z

429

Segmentation Problems JON KLEINBERG  

E-Print Network (OSTI)

the sum, over these r items, of the number of customers who like each item. This is a special case, in which one must "open" some number of facilities to serve customers: there is a cost for each facility over each item in A of the number of customers of S who like this item. In other words, if we let L

Keinan, Alon

430

Segmented stator assembly  

DOE Patents (OSTI)

An electric machine and stator assembly are provided that include a continuous stator portion having stator teeth, and a tooth tip portion including tooth tips corresponding to the stator teeth of the continuous stator portion, respectively. The tooth tip portion is mounted onto the continuous stator portion.

Lokhandwalla, Murtuza; Alexander, James Pellegrino; El-Refaie, Ayman Mohamed Fawzi; Shah, Manoj Ramprasad; Quirion, Owen Scott

2013-04-02T23:59:59.000Z

431

Analyses of Lettuce Drop Incidence and Population Structure of Sclerotinia sclerotiorum and S. minor  

E-Print Network (OSTI)

Sclerotinia sclerotiorum on canola. Phytopathology 82:875-sclerotiorum populations from canola (17), cabbage (7), and

Subbarao, K V

2007-01-01T23:59:59.000Z

432

Analyses of lettuce drop incidence and population structure of Sclerotinia sclerotiorum and S-minor  

E-Print Network (OSTI)

Sclerotinia sclerotiorum on canola. Phytopathology 82:875-sclerotiorum populations from canola (17), cabbage (7), and

Wu, B M; Subbarao, Krishna V

2006-01-01T23:59:59.000Z

433

Bull Trout (Salvelinus Confluentus) Population and Habitat Surveys in the McKenzie and Middle Fork Willamette Basins, 2000 Annual Report.  

Science Conference Proceedings (OSTI)

Prior to 1978, Dolly Varden Salvelinus malma were classified into an anadromous and interior form. Cavender (1978) classified the interior form as a distinct species, Salvelinus confluentus, the bull trout. Bull trout are large char weighing up to 18 kg and growing to over one meter in length (Goetz 1989). They are distinguished by a broad flat head, large downward curving maxillaries that extend beyond the eye, a well developed fleshy knob and a notch in the lower terminus of the snout, and light colored spots normally smaller than the pupil of the eye (Cavender 1978). Bull trout are found throughout northwestern North America from lat. 41{sup o}N to lat. 60{sup o}N. In Oregon, bull trout were once distributed throughout 12 basins in the Klamath and Columbia River systems including the Clackamas, Santiam, McKenzie and Middle Fork Willamette sub-basins west of the Cascades (Buchanan et al. 1997). However, it is believed bull trout have been extirpated from west of the Cascades with the exception of the McKenzie sub-basin. Before 1963, bull trout in the McKenzie sub-basin were a contiguous population from the mouth to Tamolitch Falls. Following the construction of Cougar and Trail Bridge Reservoirs there are three isolated populations: (1) mainstem McKenzie and tributaries from the mouth to Trail Bridge Reservoir. (2) mainstem McKenzie and tributaries above Trail Bridge Reservoir to Tamolitch Falls. (3) South Fork McKenzie and tributaries above Cougar Reservoir. The study area includes the three aforementioned McKenzie populations, and the Middle Fork Willamette and tributaries above Hills Creek Reservoir. We monitored bull trout populations in the McKenzie and Middle Fork Willamette basins using a combination of sampling techniques including: spawning surveys, standard pool counts, juvenile trapping, radio tracking, electronic fish counters, and a modified Hankin and Reeves protocol to estimate juvenile abundance and density. In addition, we continued to reintroduce bull trout fry from Anderson Creek (McKenzie Basin) to the Middle Fork Willamette above Hills Creek Reservoir in an attempt to rehabilitate the bull trout population in the Middle Fork Willamette Basin. By monitoring population trends and determining life history characteristics of bull trout in McKenzie and Middle Fork Willamette basins we can make informed management decisions that will help maintain long term and sustainable bull trout populations in the Upper Willamette Basin.

Taylor, Greg

2000-11-28T23:59:59.000Z

434

Waveform correlation methods for identifying populations of calibration events  

SciTech Connect

An approach for systematically screening large volumes of continuous data for repetitive events identified as mining explosions on basis of temporal and amplitude population characteristics. The method extends event clustering through waveform correlation with a new source-region-specific detector. The new signal subspace detector generalizes the matched filter and can be used to increase the number of events associated with a given cluster, thereby increasing the reliability of diagnostic cluster population characteristics. The method can be applied to obtain bootstrap ground truth explosion waveforms for testing discriminants, where actual ground truth is absent. The same events, if associated with to a particular mine, may help calibrate velocity models. The method may also assist earthquake hazard risk assessment by providing what amounts to blasting logs for identified mines. The cluster event lists can be reconciled against earthquake catalogs to screen explosions, otherwise hard to identify from the catalogs.

Harris, D.B.

1997-07-01T23:59:59.000Z

435

Military use of depleted uranium assessment of prolonged population exposure  

E-Print Network (OSTI)

This work is an exposure assessment for a population living in an area contaminated by use of depleted uranium (DU) weapons. RESRAD 5.91 code is used to evaluate the average effective dose delivered from 1, 10, 20 cm depths of contaminated soil, in a residential farmer scenario. Critical pathway and group are identified in soil inhalation or ingestion and children playing with the soil, respectively. From available information on DU released on targeted sites, both critical and average exposure can leave to toxicological hazards; annual dose limit for population can be exceeded on short-term period (years) for soil inhalation. As a consequence, in targeted sites cleaning up must be planned on the basis of measured concentration, when available, while special cautions have to be adopted altogether to reduce unaware exposures, taking into account the amount of the avertable dose.

Giannardi, C

2001-01-01T23:59:59.000Z

436

Dental radiography exposure of the Hiroshima and Nagasaki populations  

SciTech Connect

Dental radiography doses in Hiroshima and Nagasaki were estimated on the basis of survey data from dental hospitals and clinics in Hiroshima and Nagasaki, and doses were measured by thermoluminescent dosimeters and a phantom. Doses to organs, including the lens, pituitary fossa, thyroid gland, and skin were calculated from data obtained during a 2-week survey in both cities. The mean caput doses were calculated from the data indicating frequency per year and were tabulated by organs, age, teeth examined, type of examination, population, sex, and city. No significant difference was observed by age, population, sex, or city. Currently the doses incurred during dental radiography may not be sufficiently high to cause bias in the assessments for late radiation effects among atomic-bomb survivors. However, the mean caput thyroid doses of 62 mrad and 67 mrad in Hiroshima and Nagasaki, respectively, cannot be ignored from the standpoint of their potential in contributing to radiation-induced carcinogenesis.

Antoku, S.; Hoshi, M.; Russell, W.J.; Kihara, T.; Sawada, S.; Takeshita, K.; Otake, M.; Yoshinaga, H.; Beach, D.R.

1989-03-01T23:59:59.000Z

437

Developing a Modeling Framework for Assessing Population Impacts of  

NLE Websites -- All DOE Office Websites (Extended Search)

Developing a Modeling Framework for Assessing Population Impacts of Developing a Modeling Framework for Assessing Population Impacts of Residential Air Quality Policies Speaker(s): Jennifer Logue Date: November 13, 2012 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Brett Singer People spend the majority of their time in residences and the health burden of indoor air is significant. However, the definitions of "acceptable" and "good" indoor air quality (IAQ), and the most effective, energy efficient methods for achieving various levels of IAQ are still matters of research and debate. Current ventilation standards focus on minimum requirements for overall and mechanically provided ventilation rates, and vented combustion equipment, and require only the installation of kitchen and bath exhaust fans for source control. These standards generally are

438

Hierarchical population model with a carrying capacity distribution  

E-Print Network (OSTI)

A time- and space-discrete model for the growth of a rapidly saturating local biological population $N(x,t)$ is derived from a hierarchical random deposition process previously studied in statistical physics. Two biologically relevant parameters, the probabilities of birth, $B$, and of death, $D$, determine the carrying capacity $K$. Due to the randomness the population depends strongly on position, $x$, and there is a distribution of carrying capacities, $\\Pi (K)$. This distribution has self-similar character owing to the imposed hierarchy. The most probable carrying capacity and its probability are studied as a function of $B$ and $D$. The effective growth rate decreases with time, roughly as in a Verhulst process. The model is possibly applicable, for example, to bacteria forming a "towering pillar" biofilm. The bacteria divide on randomly distributed nutrient-rich regions and are exposed to random local bactericidal agent (antibiotic spray). A gradual overall temperature change away from optimal growth co...

Indekeu, J O

2002-01-01T23:59:59.000Z

439

Population exposure from the fuel cycle: Review and future direction  

SciTech Connect

The legacy of radiation exposures confronting man arises from two historical sources of energy, the sun and radioactive decay. Contemporary man continues to be dependent on these two energy sources, which include the nuclear fuel cycle. Radiation exposures from all energy sources should be examined, with particular emphasis on the nuclear fuel cycle, incidents such as Chernobyl and Three Mile Island. In addition to risk estimation, concepts such as de minimis, life shortening as a measure of risk, and competing risks as projected into the future must be considered in placing radiation exposures in perspective. The utility of these concepts is in characterizing population exposures for decision makers in a manner that the public may judge acceptable. All these viewpoints are essential in the evaluation of population exposure from the nuclear fuel cycle.

Richmond, C.R.

1987-01-01T23:59:59.000Z

440

Can Population III Stars at High Redshifts produce GRB's?  

E-Print Network (OSTI)

Gamma ray bursts are the most luminous physical phenomena in the universe, consisting of flashes of gamma rays that last from seconds to hours. There have been attempts to observe gamma ray bursts, for example, from population III stars of about 500 solar mass at high redshifts. Here we argue that collapse of such high mass stars does not lead to gamma ray burst as their core collapse temperatures are not sufficient to produce gamma rays, leading to GRBs.

C. Sivaram; Kenath Arun

2010-08-24T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Improving the assessment of instream flow needs for fish populations  

DOE Green Energy (OSTI)

Instream flow requirements are one of the most frequent and most costly environmental issues that must be addressed in developing hydroelectric projects. Existing assessment methods for determining instream flow requirements have been criticized for not including all the biological response mechanisms that regulate fishery resources. A new project has been initiated to study the biological responses of fish populations to altered stream flows and to develop improved ways of managing instream flows. 21 refs., 3 figs.

Sale, M.J. (Oak Ridge National Lab., TN (USA)); Otto, R.G. (Otto (R.G.) and Associates, Arlington, VA (USA))

1991-01-01T23:59:59.000Z

442

Stellar Population in LLAGN.I: Ground-based observations  

E-Print Network (OSTI)

(Abridge): We present a spectroscopic study of the stellar populations of Low Luminosity AGN (LLAGN). Our main goal is to determine whether the stars who live in the innermost (100 pc-scale) regions of these galaxies are in some way related to the emission line properties, which would imply a link between the stellar population and the ionization mechanism. High signal to noise, ground based long-slit spectra in the 3500--5500 A interval were collected for 60 galaxies.Our main findings are: (1) Few LLAGN have a detectable young (weak [OI] emission, but rare (10 %) in LLAGN with stronger [OI]. This is intriguing since LLAGN with weak [OI] have been previously hypothesized to be ``transition objects'' in which both an AGN and young stars contribute to the emission-line excitation. Massive stars, if present, are completely outshone by intermediate age and old stars in the optical. This happens in at least a couple of objects where independent UV spectroscopy detects young starbursts not seen in the optical. (4) Objects with predominantly old stars span the whole range of [OI]/Halpha values, but (5) sources with significant young and/or intermediate age populations are nearly all (90%) weak [OI] emitters.

Roberto Cid Fernandes; Rosa M. Gonzalez Delgado; Henrique Schmitt; Thaisa Storchi-Bergmann; Lucimara P. Martins; Enrique Perez; Timothy Heckman; Claus Leitherer; Daniel Schaerer

2004-01-21T23:59:59.000Z

443

A review of the effectiveness of recreation prevention and intervention efforts with at-risk and juvenile delinquent populations  

E-Print Network (OSTI)

A segment of youth in society are considered at risk, and the number is increasing. At-risk youth are a problem to the extent that many of them become delinquents with a resulting high social and economic cost to the individuals and society. The use of recreation is often left out of the variety of services that have been suggested or utilized to help either prevent delinquency or intervene once the problems occur. Thus, the overall goal of this study was to investigate the effectiveness of recreation prevention and intervention efforts with at-risk and juvenile delinquent populations through an examination of theoretical and empirical research in the leisure, criminology, sociology, psychology, and education fields. This goal was achieved through the accomplishment of five purposes: develop a better understanding of the role recreation can play in the prevention of juvenile delinquency and the use of recreation as an intervention mechanism; identify key variables that are impacted by recreation; conceptualize the recreation impact construct; identify instrumentation used to measure key variables; and, identify limitations/issues in evaluation instrumentation. Specific outcomes of the study included: the development of a continuum describing youth from a position of risk to juvenile delinquency; the development of a taxonomy of possible domains based on the identified key variables; development of a taxonomy of existing theories and concepts used to explain delinquency; conceptualization of a model explaining the impact of recretain in delinquency prevention and intervention; and, the compilation and critique of an inventory of instruments used to measure recreation-delinquency variables. The results of the study provide a framework from which research in the area of youth-at-risk and delinquency and the use of recreation as a medium of prevention and/or intervention can be investigated.

McKay, Stacey Lyn

1994-01-01T23:59:59.000Z

444

Executive Order 12898: Federal Actions to Address Environmental Justice in Minority Populations and Low-Income Populations (1994)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Documents Documents Federal Register Vol. 59, No. 32 Wednesday, February 16, 1994 Title 3- The President Executive Order 12898 of February 11, 1994 Federal Actions To Address Environmental Justice in Minority Populations and Low-Income Populations By the authority vested in me as President by the Constitution and the laws of the United States of America, it is hereby ordered as follows: Section 1-1.Implementation. 1-101. Agency Responsibilities. To the greatest extent practicable and per- mitted by law, and consistent with the principles set forth in the report on the National Performance Review, each Federal agency shall make achiev- ing environmental justice part of its mission by identifying and addressing, as appropriate, disproportionately high and adverse human health or environ-

445

Factors affecting the failure of copper connectors brazed to copper bus bar segments on a 615-MVA hydroelectric generator at Grand Coulee Dam  

DOE Green Energy (OSTI)

On March 21, 1986, the United States Bureau of Reclamation experienced a ground fault in the main parallel ring assembly of Unit G19 - a 615-MVA hydroelectric generator - at Grand Coulee Dam, Washington. Inspection of the unit revealed that the ground fault had been induced by fracture of one or more of the copper connectors used to join adjacent segments of one of the bus bars in the north half of the assembly. Various experimental techniques were used to detect and determine the presence of cracks, crack morphology, corrosion products, and material microstructure and/or embrittlement. The results of these inspections and recommendations are given. 7 refs., 27 figs.

Atteridge, D.G.; Klein, R.F.; Layne, R.; Anderson, W.E.; Correy, T.B.

1988-01-01T23:59:59.000Z

446

Fast adaptive algorithms for low-level scene analysis: applications of polar exponential grid (PEG) representation to high-speed, scale-and-rotation invariant target segmentation  

SciTech Connect

Presents results of experimental studies in image understanding. Two experiments are discussed, one on image correlation and another on target boundary estimation. The experiments are demonstrative of polar exponential grid (peg) representation, an approach to sensory data coding which the authors believe will facilitate problems in 3-d machine perception. The discussion of the image correlation experiment is largely an exposition of the peg-representation concept and approaches to its computer implementation. A robust stochastic, parallel computation segmentation algorithm, the peg parallel hierarchical ripple filter (peg-phrf), is presented. 18 references.

Schenker, P.S.; Wong, K.M.; Cande, E.G.

1981-01-01T23:59:59.000Z

447

Impacts of Vessel Noise Perturbations on the Resident Sperm Whale Population in the Gulf of Mexico  

E-Print Network (OSTI)

The Gulf of Mexico is home to two of the world?s ten busiest ports by cargo volume, the Port of New Orleans and the Port of Houston; and in 2008, these ports hosted a combined 14,000 ships, a number which is likely only to increase. Past research shows that this increase in shipping worldwide has historically lead to an increase in ambient noise level of 3-5dB per decade. Sperm whales in the Gulf of Mexico are considered a genetically distinct, resident population. They have a preference for the Louisiana-Mississippi Shelf region which directly overlaps with the entrance to the Mississippi and the Port of New Orleans. Disruptions from vessel noise could influence feeding and breeding patterns essential to the health of the stock. Data used in this analysis were collected continuously over 36 days in the summer of 2001 from bottom moored Navy Environmental Acoustic Recording System (EARS) buoys. Results showed a significant difference (P<0.05) in noise level between hours with ships passing and hours without. Metrics for 56 ship passages were analyzed to compare duration of ship passage with duration of maximum received level (MRL) during ship passage. Results of that analysis showed an average ship passage of 29 minutes with average MRL lasting 23% of the ship passage and an average increase of 40dB. Lastly, click counts were made with the Pamguard. Click counts for ship passages were completed for 35 min and 17.5 min before and after the estimated closest point of approach (CPA) for each ship. Results showed a 36% decrease in the number of detectable clicks as a ship approaches when comparing clicks detected at intervals of both 35 minutes before and 17 minutes before the CPA; additionally, 22% fewer clicks were counted 30 min after the ship than 30 min before (results significant at the P=0.01 level). These results indicate a potential change in sperm whale behavior when exposed to large class size vessel traffic (e.g. tankers and container ships) from major shipping lanes. Recommendations for addressing this issue are discussed.

Azzara, Alyson

2012-05-01T23:59:59.000Z

448

Energy policy: Comparative effects on minority population groups  

SciTech Connect

For a number of years, analyses of minority household energy demand have been supported by the United States Department of Energy (DOE), Office of Economic Impact and Diversity (formerly the Office of Minority Economic Impact). The intention of these analyses has been to characterize patterns of energy demand by various demographic, regional and socioeconomic groups and to develop analytical tools to assess the distributive impact of energy prices and policy on these groups. The model supports strategic objectives outlined by the Department of Energy to explicitly recognize and promote equity in state public utility commission decisions and to assess the potential impact of federal and state energy policy on demographically diverse groups as reported in the Department`s Annual Energy Outlook and the upcoming National Energy Policy Plan. The legislation mandating the Office of Economic Impact and Diversity had been premised on the assumption that patterns of energy demand for minority households are different from the population as a whole. Determining the validity of this premise and its potential economic impact on different population groups has been a major objective of these analyses. Consequently, the recripriocal impacts of energy policy on demographic groups and energy consumption and expenditure dynamics on policy formulation and strategy is a central objective of these studies. Residential energy demand research has been substantial in the past twenty years. Insightful and useful research has been done in this area. However, none of this research has addressed the potential differences in the residential energy demand structure among various population groups. Recent work does compare energy and electricity demand elasticities for non-Latino Whites, with the demand elasticities for Latinos and Blacks. This research is particularly important for examination of questions related to the economic welfare implications of national energy policy.

Poyer, D.A.; Henderson, L.

1995-06-01T23:59:59.000Z

449

Energy Distributions and the Formation Times of Spheroidal Populations  

E-Print Network (OSTI)

I review recent progress in exploring the formation times of spheroidal stellar populations (elliptical galaxies and large spiral bulges) using spectrophotometric techniques. A quickly growing body of evidence shows that although massive spheroids can form at early times, there are strong environmental dependencies, and major transitions in star formation histories and even morphologies are detectable to surprisingly small redshifts (z ~ 0.2). These features are consistent with neither the strict monolithic collapse nor hierarchical merging scenarios. Restframe UV observations are a promising means of improving our understanding of spheroid evolution.

Robert W. O'Connell

1999-08-20T23:59:59.000Z

450

Population viability analysis of the Endangered shortnose sturgeon  

Science Conference Proceedings (OSTI)

This study used population viability analysis (PVA) to partition the influences of potential threats to the endangered shortnose sturgeon (Acipenser brevirostrum). A workshop brought together experts to help identify potential threats including groundwater withdrawal, poor water quality, saltwater intrusion, mercury effects, harvest as by-catch, and sedimentation of spawning habitat. During the course of the project, we eliminated some threats and added new ones. Groundwater withdrawal was dismissed after a study failed to identify connection with groundwater and the majority of pumping is from a confined aquifer. We also eliminated activities on Fort Stewart as influences on spawning habitat because any successful spawning must occur upstream of Fort Stewart. We added climate change to the list of threats based on our assessment of temperature effects and expectations of sea-level rise. Our study highlighted the role of populations in nearby rivers in providing metapopulation support, raising the concern that the population in the Ogeechee River acts as a demographic sink. As part of this study, we carried out a field sampling study to analyze effects of training activities on headwater streams. We developed a new methodology for sampling design as part of this effort and used a mixed-modeling approach to identify relationships between land cover-land use, including those associated with military training activity and water quality. We found that tank training was associated with higher suspended sediment and equipment training was associated with higher organic carbon) and water quality. We detected effects of training on suspended sediment and organic carbon. We also carried out a field sampling effort in the Canoochee and Ogeechee Rivers. In the Ogeechee River, we found that dissolved oxygen in 40% of measurements during summer were below 4 mg L-1. To evaluate mercury as a potential threat, we developed a mercury uptake model and analyzed mercury levels in amphipod prey and sturgeon eggs. These did not exceed EPA guidelines. Finally, we developed a PVA model that including linkages between shortnose sturgeon growth, reproduction, and survival and each remaining threat; All three had significant influences. Preliminary simulations suggest that elevated temperatures under future climate will extirpate this population and add support to the hypothesis that this species requires access to spawning habitat far upstream to persist.

Jager, Yetta [ORNL; Bevelhimer, Mark S [ORNL; Peterson, Douglas L. [University of Georgia, Athens, GA

2011-07-01T23:59:59.000Z

451

Greedy sums of distinct squares  

Science Conference Proceedings (OSTI)

When a positive integer is expressed as a sum of squares, with each successive summand as large as possible, the summands decrease rapidly in size until the very end, where one may find two 4's, or several 1's. We find that the set of integers for which ... Keywords: Greedy algorithm, differential-difference equations

Hugh L. Montgomery; Ulrike M. A. Vorhauer

2004-01-01T23:59:59.000Z

452

Stellar Populations in Compact Galaxy Groups: a Multi-Wavelength Study of HCGs 16, 22, and 42, their Star Clusters and Dwarf Galaxies  

E-Print Network (OSTI)

We present a multi-wavelength analysis of three compact galaxy groups, HCGs 16, 22, and 42, which describe a sequence in terms of gas richness, from space- (Swift, HST, Spitzer) and ground-based (LCO, CTIO) imaging and spectroscopy. We study various signs of past interactions including a faint, dusty tidal feature about HCG 16A, which we tentatively age-date at <1 Gyr. This represents the possible detection of a tidal feature at the end of its phase of optical observability. Our HST images also resolve what were thought to be double nuclei in HCG 16C and D into multiple, distinct sources, likely to be star clusters. Beyond our phenomenological treatment, we focus primarily on contrasting the stellar populations across these three groups. The star clusters show a remarkable intermediate-age population in HCG 22, and identify the time at which star formation was quenched in HCG 42. We also search for dwarf galaxies at accordant redshifts. The inclusion of 33 members and 27 'associates' (possible members) rad...

Konstantopoulos, I S; Charlton, J C; Fedotov, K; Durrell, P R; Mulchaey, J S; English, J; Desjardins, T D; Gallagher, S C; Walker, L M; Johnson, K E; Tzanavaris, P; Gronwall, C

2013-01-01T23:59:59.000Z

453

On the Absence of Population Bias in the Tornado Climatology of Southwestern Ontario  

Science Conference Proceedings (OSTI)

Rural population densities and tornado incidence (confirmed and probable categories) are compared for noncoastal regions in the southwestern Ontario peninsula. No apparent relationship is found between rural population density and F0–F4 ...

Patrick King

1997-12-01T23:59:59.000Z

454

A HMM-based hierarchical framework for long-term population projection of small areas  

Science Conference Proceedings (OSTI)

Population Projection is the numerical outcome of a specific set of assumptions about future population changes. It is indispensable to the planning of sites as almost all successive planning activities such as the identification of land and housing ...

Bin Jiang; Huidong Jin; Nianjun Liu; Mike Quirk; Ben Searle

2007-12-01T23:59:59.000Z

455

Genetic variants associated with fasting glucose and insulin concentrations in an ethnically diverse population: results from the Population Architecture using Genomics and Epidemiology (PAGE) study  

E-Print Network (OSTI)

USA. 19 Office of Population Genomics, National Human GenomeArchitecture using Genomics and Epidemiology (PAGE) Study.Architecture using Genomics and Epidemiology (PAGE) study.

2013-01-01T23:59:59.000Z

456

GIS and plume dispersion modeling for population exposure assessment  

E-Print Network (OSTI)

The use of Pollutant Plume Dispersion Models is widespread in the evaluation of point sources of air pollution. These models provide valuable insight into the concentration and dispersion of hazardous materials throughout the atmosphere. Traditional methods of dispersion modeling for the permitting of new sources and the monitoring of existing sources have allowed much room for error in terms of the effect of the pollutants on nearby populations (Hardikar, 1995). The capabilities of GIS technology offer an improved method of conducting air quality modeling for permitting, remediation studies, and environmental monitoring. GIS has the ability to develop and manage a comprehensive database of model output, map layers, and demographic data that can prove extremely valuable in the modeling process. This data can serve to extend the capabilities of air pollution dispersion modeling from mere estimation of concentrations to comprehensive exposure assessment of neighboring populations (Lowry, et al. 1995, Maslia, et al. 1994). A study of the Monticello power plant in northeast Texas was conducted using the SCREEN3 mathematical plume dispersion model, US Census Bureau demographic data, and a GIS to examine the effects of the plant output on the people living in the seven county area surrounding the plant.

Archer, Jeffrey Keith

1998-01-01T23:59:59.000Z

457

Yunnan-III models for Evolutionary population synthesis  

E-Print Network (OSTI)

We build the Yunnan-III evolutionary population synthesis (EPS) models by using the MESA stellar evolution code, BaSeL stellar spectra library and the initial mass functions (IMFs) of Kroupa and Salpeter, and present colours and integrated spectral energy distributions (ISEDs) of solar-metallicity stellar populations (SPs) in the range of 1Myr-15 Gyr. The main characteristic of the Yunnan-III EPS models is the usage of a set of self-consistent solar-metallicity stellar evolutionary tracks (the masses of stars are from 0.1 to 100Msun). This set of tracks is obtained by using the state-of-the-art MESA code. MESA code can evolve stellar models through thermally pulsing asymptotic giant branch (TP-AGB) phase for low- and intermediate-mass stars. By comparisons, we confirm that the inclusion of TP-AGB stars make the V-K, V-J and V-R colours of SPs redder and the infrared flux larger at ages log(t/yr)>7.6 (the differences reach the maximum at log(t/yr)~8.6, ~0.5-0.2mag for colours, ~2 times for K-band flux). The st...

Zhang, F; Han, Z; Zhuang, Y; Kang, X

2012-01-01T23:59:59.000Z

458

2001 New York State NHTS: Travel Patterns of Special Populations  

SciTech Connect

Policymakers rely on transportation statistics, including data on personal travel behavior, to formulate strategic transportation policies, and to improve the safety and efficiency of the U.S. transportation system. Data on personal travel trends are needed to examine the reliability, efficiency, capacity, and flexibility of the Nation's transportation system to meet current demands and accommodate future demands; to assess the feasibility and efficiency of alternative congestion-alleviating technologies (e.g., high-speed rail, magnetically levitated trains, intelligent vehicle and highway systems); to evaluate the merits of alternative transportation investment programs; and to assess the energy-use and air-quality impacts of various policies. To address these data needs, the U.S. Department of Transportation (USDOT) initiated an effort in 1969 to collect detailed data on personal travel. The 1969 survey was the first Nationwide Personal Transportation Survey (NPTS). The survey was conducted again in 1977, 1983, 1990, 1995, and 2001. Data on daily travel were collected in 1969, 1977, 1983, 1990 and 1995. Longer-distance travel was collected in 1977 and 1995. The 2001 National Household Travel Survey (NHTS) collected both daily and longer-distance trips in one survey. The 2001 survey was sponsored by three USDOT agencies: Federal Highway Administration (FHWA), Bureau of Transportation Statistics (BTS), and National Highway Traffic Safety Administration (NHTSA). The primary objective of the survey was to collect trip-based data on the nature and characteristics of personal travel so that the relationships between the characteristics of personal travel and the demographics of the traveler can be established. Commercial and institutional travel was not part of the survey. New York State participated in the 2001 NHTS by procuring additional 12,000 sample households. These additional sample households allowed New York State to address transportation planning issues pertinent to geographic areas that are significantly smaller than what the national NHTS data allowed. The final sample size for New York State was 13,423 usable households. In this report, Oak Ridge National Laboratory (ORNL) identifies and analyzes differences, if any, in travel patterns that are attributable to demographic characteristics (e.g., gender, age, race and ethnicity), household characteristics (e.g., low income households, zero and one car households), modal characteristics and geographic location. Travel patterns of those who work at home are examined and compared to those of conventional workers, as well as those who do not work. Focus is given to trip frequency, travel by time of day, trip purpose, and mode choice. For example, included in this analysis is the mobility of the elderly population in New York State. The American society is undergoing a major demographic transformation that is resulting in a greater percentage of older individuals in the population. In addition to demographic changes, recent travel surveys show that an increasing number of older individuals are licensed to drive and that they drive more than their same age cohort did a decade ago. Cohort differences in driving are particularly apparent - not only are more of today's elderly population licensed to drive than their age cohort two decades ago, they also drive more. Equally important are the increase in immigration and in racial and cultural diversity. This report also discusses vehicle availability, socioeconomic characteristics, travel trends (e.g., miles travelled, distance driven, commute patterns), and the transportation accessibility of these populations. Specifically, this report addresses in detail the travel behavior of the following special populations: (1) the elderly, defined as those who were 65 years old or older, (2) low-income households, (3) ethnic groups and immigrants, and (4) those who worked at home.

Hu, Patricia S [ORNL; Reuscher, Tim [ORNL

2010-03-01T23:59:59.000Z

459

Statistical Journal of the United Nations ECE 23 (2006) 110 1 New forecast: Population decline postponed  

E-Print Network (OSTI)

Statistical Journal of the United Nations ECE 23 (2006) 1­10 1 IOS Press New forecast: Population, Finland fStatistics Norway, Oslo, Norway Abstract. We present results of a probabilistic forecast for the population in 18 European countries, to 2050. Other forecasts have recently predicted a falling population

Løw, Erik

460

A Population Study of Golden Eagles in the Altamont Pass Wind Resource Area: Population Trend Analysis, 1994-1997  

SciTech Connect

The wind industry has annually reported 28-43 turbine blade strike casualties of golden eagles in the Altamont Pass Wind Resource Area, and many more carcasses have doubtless gone unnoticed. Because this species is especially sensitive to adult survival rate changes, we focused upon estimating the demographic trend of the population. In aerial surveys, we monitored survival within a sample of 179 radio-tagged eagles over a four-year period. We also obtained data on territory occupancy and reproduction of about 65 eagle pairs residing in the area. Of 61 recorded deaths of radio-tagged eagles during the four-year investigation, 23 (38%) were caused by wind turbine blade strikes. Additional fatalities were unrecorded because blade strikes sometimes destroy radio transmitters. Annual survival was estimated at 0.7867 (SE=0.0263) for non-territorial eagles and 0.8964 (SE=0.0371) for territorial ones. Annual reproduction was 0.64 (SE=0.08) young per territorial pair (0.25 per female). These parameters were used to estimate population growth rates under different modeling frameworks. At present, there are indications that a reserve of non-breeding adults still exists, i.e., there is an annual territorial reoccupancy rate of 100% and a low incidence (3%) of subadults as members of breeding pairs.

Predatory Bird Research Group, Long Marine Laboratory

1999-07-20T23:59:59.000Z

Note: This page contains sample records for the topic "distinct population segment" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.