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1

Design and control of hierarchically structured nanomaterials  

E-Print Network (OSTI)

Hierarchically ordered porous oxides have garnered much interest because of the numerous applications that can be developed from these materials. The catalytic properties, separation ability, and ion exchangeability of these materials, specifically zeolites, make them great candidates for applications. One area which has not been heavily studied is ways to control the morphology and particle size of these materials through soft chemistry approaches. This dissertation looks at two methodologies which can be used to alter zeolitic particle morphology. The first is a dual templating approach which attempts to incorporate microporous walls within a mesoporous structure. The zeolitic material, silicalite-1, is used as a siliceous precursor for the formation of the mesoporous SBA-15 material. A battery of characterization techniques were used to identify the structural properties of the material, including porosimetry, diffraction, microscopy, and spectroscopy. The overall conclusion was that a material with different properties than the parent SBA-15 were obtained, but that no characterization technique could be used to show the definitive presence of the zeolite in the walls. Another technique studied is the growth of zeolitic materials within the water domains of microemulsions. The concept of a reverse microemulsion, a confined water droplet in a continuous oil phase makes it an interesting system for morphological control. The zeolitic materials should only be able to grow within the water domain, and the reactive materials should be less available as they are trapped in separate micelles. Zeolite A (LTA) and zeolite L (LTL), two technologically important zeolites, were studied. Enhanced growth, larger particles, and unique material aggregates are just a few of the observations made for the two systems. The development of these materials should facilitate the application of zeolite in emerging technologies. In particular, preliminary work has been done on the development of large zeolite crystals with tuned orientations and particle sizes. This research shows multiple ways in which particle size and morphology can be tuned simply by altering the chemistry and reaction conditions of the system. This research has led to unique findings dealing with large zeolite crystals, and should open the door for continued research in this area.

Carr, Charles Shane

2005-08-01T23:59:59.000Z

2

Hierarchical layout verification for submicron designs  

Science Conference Proceedings (OSTI)

In this paper we present the program HEXDRC for hierarchical circuit extraction and design rule check. The main problem for hierarchical layout verification is to handle interactions between different cells effectively. The kind of interactions however ...

W. Meier

1990-03-01T23:59:59.000Z

3

Hierarchical Partitioning Techniques for Structured Adaptive Mesh Refinement Applications  

Science Conference Proceedings (OSTI)

This paper presents the design and preliminary evaluation of hierarchical partitioning and load-balancing techniques for distributed structured adaptive mesh refinement (SAMR) applications. The overall goal of these techniques is to enable the load distribution ... Keywords: distributed computing, dynamic load balancing, hierarchical partitioning algorithm, structured adaptive mesh refinement

Xiaolin Li; Manish Parashar

2004-06-01T23:59:59.000Z

4

Do hierarchical structures assemble best via hierarchical pathways?  

E-Print Network (OSTI)

Hierarchically structured natural materials possess functionalities unattainable to the same components organized or mixed in simpler ways. For instance, the bones and teeth of mammals are far stronger and more durable than the mineral phases from which they are derived because their constituents are organized hierarchically from the molecular scale to the macroscale. Making similarly functional synthetic hierarchical materials will require an understanding of how to promote the self-assembly of structure on multiple lengthscales, without falling foul of numerous possible kinetic traps. Here we use computer simulation to study the self-assembly of a simple hierarchical structure, a square crystal lattice whose repeat unit is a tetramer. Although the target material is organized hierarchically, it self-assembles most reliably when its dynamic assembly pathway consists of the sequential addition of monomers to a single structure. Hierarchical dynamic pathways via dimer and tetramer intermediates are also viable modes of assembly, but result in general in lower yield: these intermediates have a stronger tendency than monomers to associate in ways not compatible with the target structure. In addition, assembly via tetramers results in a kinetic trap whereby material is sequestered in trimers that cannot combine to form the target crystal. We use analytic theory to relate dynamical pathways to the presence of equilibrium phases close in free energy to the target structure, and to identify the thermodynamic principles underpinning optimum self-assembly in this model: 1) make the free energy gap between the target phase and the most stable fluid phase of order kT, and 2) ensure that no other dense phases (liquids or close-packed solids of monomers or oligomers) or fluids of incomplete building blocks fall within this gap.

Thomas K. Haxton; Stephen Whitelam

2012-11-15T23:59:59.000Z

5

Hierarchically Structured Materials for Lithium Batteries  

SciTech Connect

Lithium-ion battery (LIB) is one of the most promising power sources to be deployed in electric vehicles (EV), including solely battery powered vehicles, plug-in hybrid electric vehicles, and hybrid electrical vehicles. With the increasing demand on devices of high energy densities (>500 Wh/kg) , new energy storage systems, such as lithium-oxygen (Li-O2) batteries and other emerging systems beyond the conventional LIB also attracted worldwide interest for both transportation and grid energy storage applications in recent years. It is well known that the electrochemical performances of these energy storage systems depend not only on the composition of the materials, but also on the structure of electrode materials used in the batteries. Although the desired performances characteristics of batteries often have conflict requirements on the micro/nano-structure of electrodes, hierarchically designed electrodes can be tailored to satisfy these conflict requirements. This work will review hierarchically structured materials that have been successfully used in LIB and Li-O2 batteries. Our goal is to elucidate 1) how to realize the full potential of energy materials through the manipulation of morphologies, and 2) how the hierarchical structure benefits the charge transport, promotes the interfacial properties, prolongs the electrode stability and battery lifetime.

Xiao, Jie; Zheng, Jianming; Li, Xiaolin; Shao, Yuyan; Zhang, Jiguang

2013-09-25T23:59:59.000Z

6

Hierarchically structured energy markets as novel smart grid control approach  

Science Conference Proceedings (OSTI)

The paper investigates the self-stabilization of hierarchically structured markets. We propose a new approach that is motivated by the physical structure of the energy grid and generalizes classical market structures in a natural way. Hierarchical markets ... Keywords: agents, hierarchical markets, simulation, smart grid

Jörg Lässig; Benjamin Satzger; Oliver Kramer

2011-10-01T23:59:59.000Z

7

Hierarchically structured bicontinuous polymeric microemulsions  

Science Conference Proceedings (OSTI)

We recently described the synthesis and phase behavior of a new type of CECEC-P multiblock copolymer composed of glassy poly(cyclohexylethylene) (C), semicrystalline poly(ethylene) (E), and elastomeric poly(ethylene-alt-propylene) (P) with symmetric (equal volume) CECEC and P sequences (G. Fleury and F. S. Bates, Macromolecules, 2009, 42, 3598-3610). Here we report the formation and characterization of a multicontinuous structure based on the blending of CEC triblock copolymer and P homopolymer with such a hexablock copolymer along the 50:50 (CEC/P) isopleth. These materials produce a sequence of phases that are correlated with the volume fraction of CECEC-P as evidenced by SAXS and TEM measurements. A percolating bicontinuous mesostructure was identified at volume fractions of hexablock copolymer, f{sub CECEC-P} = 0.10 and 0.125, within the composition range known to result in a bicontinuous morphology in A-B/A/B systems. A solid product was formed by cooling the initially homogeneous ternary mixture from above the melting temperature of the E blocks to room temperature. Crystallization of E leads to microphase separation of C and E and simultaneous ejection of P from CEC (and CECEC) at a larger length scale. The mechanical properties of these materials are inferior to what is anticipated based on pure CEC triblock copolymer, attributable to the low molecular weight and irregular structure of the C/E region sequences. Nevertheless, this study establishes a procedure for producing bicontinuous yet structurally asymmetric materials based on the microemulsion process and extends the concept of a microemulsion to multiblock copolymers.

Fleury, Guillaume; Bates, Frank S. (UMM)

2012-07-24T23:59:59.000Z

8

Hierarchical indexing and flexible element retrieval for structured document  

Science Conference Proceedings (OSTI)

As more and more structured documents, such as the SGML or XML documents, become available on the Web, there is a growing demand to develop effective structured document retrieval which exploits both content and hierarchical structure of documents and ...

Hang Cui; Ji-Rong Wen; Tat-Seng Chua

2003-04-01T23:59:59.000Z

9

Multi-view gender classification using hierarchical classifiers structure  

Science Conference Proceedings (OSTI)

In this paper, we propose a hierarchical classifier structure for gender classification based on facial images by reducing the complexity of the original problem. In the proposed framework, we first train a classifier, which will properly divide the ... Keywords: gender classification, hierarchical classifiers, multi-view facial images

Tian-Xiang Wu; Bao-Liang Lu

2010-11-01T23:59:59.000Z

10

INTERACTIVE COMPUTER GRAPHICS DISPLAYS FOR HIERARCHICAL DATA STRUCTURES  

E-Print Network (OSTI)

INTERACTIVE COMPUTER GRAPHICS DISPLAYS FOR HIERARCHICAL DATAINTERACTIVE COMPUTER GRAPHICS DISPLAYS FOR HIERARCHICAL DATAtem. INTERACTIVE COMPUTER GRAPHICS DISPLAYS FOR HIERARCHICAL

Cahn, D.F.

2010-01-01T23:59:59.000Z

11

Structure vs. content in hierarchical corpora  

Science Conference Proceedings (OSTI)

We propose and describe Parameterized filesystem HITS (PFH), a lightweight rearrangement algorithm that performs a re-ranking of existing content-only search results in tree-like hierarchical corpora, such as a filesystem. PFH does this by combining ... Keywords: Desktop search, HITS, Information retrieval, Ranking

Alex Penev; Raymond K. Wong

2010-12-01T23:59:59.000Z

12

A hierarchical structure approach to MultiSensor Information Fusion  

SciTech Connect

A major problem with image-based MultiSensor Information Fusion (MSIF) is establishing the level of processing at which information should be fused. Current methodologies, whether based on fusion at the pixel, segment/feature, or symbolic levels, are each inadequate for robust MSIF. Pixel-level fusion has problems with coregistration of the images or data. Attempts to fuse information using the features of segmented images or data relies an a presumed similarity between the segmentation characteristics of each image or data stream. Symbolic-level fusion requires too much advance processing to be useful, as we have seen in automatic target recognition tasks. Image-based MSIF systems need to operate in real-time, must perform fusion using a variety of sensor types, and should be effective across a wide range of operating conditions or deployment environments. We address this problem through developing a new representation level which facilitates matching and information fusion. The Hierarchical Scene Structure (HSS) representation, created using a multilayer, cooperative/competitive neural network, meets this need. The MSS is intermediate between a pixel-based representation and a scene interpretation representation, and represents the perceptual organization of an image. Fused HSSs will incorporate information from multiple sensors. Their knowledge-rich structure aids top-down scene interpretation via both model matching and knowledge-based,region interpretation.

Maren, A.J. [Tennessee Univ., Tullahoma, TN (United States). Space Inst.; Pap, R.M.; Harston, C.T. [Accurate Automation Corp., Chattanooga, TN (United States)

1989-12-31T23:59:59.000Z

13

A hierarchical structure approach to MultiSensor Information Fusion  

SciTech Connect

A major problem with image-based MultiSensor Information Fusion (MSIF) is establishing the level of processing at which information should be fused. Current methodologies, whether based on fusion at the pixel, segment/feature, or symbolic levels, are each inadequate for robust MSIF. Pixel-level fusion has problems with coregistration of the images or data. Attempts to fuse information using the features of segmented images or data relies an a presumed similarity between the segmentation characteristics of each image or data stream. Symbolic-level fusion requires too much advance processing to be useful, as we have seen in automatic target recognition tasks. Image-based MSIF systems need to operate in real-time, must perform fusion using a variety of sensor types, and should be effective across a wide range of operating conditions or deployment environments. We address this problem through developing a new representation level which facilitates matching and information fusion. The Hierarchical Scene Structure (HSS) representation, created using a multilayer, cooperative/competitive neural network, meets this need. The MSS is intermediate between a pixel-based representation and a scene interpretation representation, and represents the perceptual organization of an image. Fused HSSs will incorporate information from multiple sensors. Their knowledge-rich structure aids top-down scene interpretation via both model matching and knowledge-based,region interpretation.

Maren, A.J. (Tennessee Univ., Tullahoma, TN (United States). Space Inst.); Pap, R.M.; Harston, C.T. (Accurate Automation Corp., Chattanooga, TN (United States))

1989-01-01T23:59:59.000Z

14

Ray tracing a three-dimensional scene using a hierarchical data structure  

SciTech Connect

Ray tracing a three-dimensional scene made up of geometric primitives that are spatially partitioned into a hierarchical data structure. One example embodiment is a method for ray tracing a three-dimensional scene made up of geometric primitives that are spatially partitioned into a hierarchical data structure. In this example embodiment, the hierarchical data structure includes at least a parent node and a corresponding plurality of child nodes. The method includes a first act of determining that a first active ray in the packet hits the parent node and a second act of descending to each of the plurality of child nodes.

Wald, Ingo; Boulos, Solomon; Shirley, Peter

2012-09-04T23:59:59.000Z

15

Hierarchical Structure for function approximation using radial basis function  

Science Conference Proceedings (OSTI)

The hierarchial network proposed (Multi-RBFNN), is composed of complete Radial Basis Function Neural Networks (RBFNNs) that are in charge of a reduced set of input variables with the property of which every Sub-RBFNN can take charge of a set of input ... Keywords: function approximation, hierarchical architectures, input variable selection, radial bases functions

A. Awad; H. Pomares; I. Rojas; L. J. Herrera; A. Guillen; O. Valenzuela

2005-12-01T23:59:59.000Z

16

OBB-Tree: A Hierarchical Structure for Rapid Interference Detection  

E-Print Network (OSTI)

algorithms for efficient con- struction of tight-fitting OBB-Tree'sand overlap detection between two OBB of models using tight-fitting oriented bounding box trees. At runtime, the algorithm traverses the tree contributions are: 1. New efficient algorithms for hierarchical representation of large models using tight

North Carolina at Chapel Hill, University of

17

Hierarchical Modeling for Population-Based Heat Exchanger Design  

E-Print Network (OSTI)

Characteristics of the Stirling Engine Regenerator in anapproach to the design of Stirling engine regenerator matrixFoil Regenerator for Stirling Engines." [48] Ibrahim, M. ,

Geb, David

2013-01-01T23:59:59.000Z

18

Molecular Evolution: Automated Manipulation of Hierarchical Chemical Topology and Its Application to Average Molecular Structures  

Science Conference Proceedings (OSTI)

A simple hierarchical data structure (tree) and associated set of algorithms (written in Mathematica) have been developed that permit the direct manipulation of the topology of a molecule while simultaneously maintaining valid chemical valence. Coupled ... Keywords: Mathematica, average chemical structure, chemical topology, genetic algorithm, genetic program, hierarchy, topological descriptor

Robert B. Nachbar

2000-04-01T23:59:59.000Z

19

The design and implementation of hierarchical software systems with reusable components  

E-Print Network (OSTI)

We present a domain-independent model of hierarchical software system design and construction that is based on interchangeable software components and largescale reuse. The model unifies the conceptualizations of two independent projects, Genesis and Avoca, that are successful examples of software component/building-block technologies and domain modeling. Building-block technologies exploit large-scale reuse, rely on open architecture software, and elevate the granularity of programming to the subsystem level. Domain modeling formalizes the similarities and differences among systems of a domain. We believe our model is a blue-print for achieving software component technologies in many domains.

Don Batory

1992-01-01T23:59:59.000Z

20

Warm Standby in Hierarchically Structured Process-Control Programs  

E-Print Network (OSTI)

We classify standby redundancy design space in process-control programs into the following three categories: cold standby, warm standby, and hot standby. Design parameters of warm standby are identified and the reliability of a system using warm standby is evaluated and compared with that of hot standby. Our analysis indicates that the warm standby scheme is particularly suitable for longlived unmaintainable systems, especially those operating in harsh environments where burst hardware failures are possible. The feasibility of warm standby is demonstrated with a simulated chemical batch reactor system.

Ing-Ray Chen And; Ing-ray Chen; Farokh B. Bastani

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hierarchical structure designed" 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

Hierarchical Partitioning Techniques for Structured Adaptive Mesh Refinement (SAMR) Applications  

E-Print Network (OSTI)

- loaded once a month. Using software specifically designed for viewing the data, we can separate out as humans. Vampire Bats? The legend of Dracula, the human vampire, arose long before real blood-drinking bats were even discovered in South America. Vampire bats (of which there are 3 species) were actually

Parashar, Manish

22

HIERARCHICAL STRUCTURE OF MAGNETOHYDRODYNAMIC TURBULENCE IN POSITION-POSITION-VELOCITY SPACE  

SciTech Connect

Magnetohydrodynamic turbulence is able to create hierarchical structures in the interstellar medium (ISM) that are correlated on a wide range of scales via the energy cascade. We use hierarchical tree diagrams known as dendrograms to characterize structures in synthetic position-position-velocity (PPV) emission cubes of isothermal magnetohydrodynamic turbulence. We show that the structures and degree of hierarchy observed in PPV space are related to the presence of self-gravity and the global sonic and Alfvenic Mach numbers. Simulations with higher Alfvenic Mach number, self-gravity and supersonic flows display enhanced hierarchical structure. We observe a strong dependency on the sonic and Alfvenic Mach numbers and self-gravity when we apply the statistical moments (i.e., mean, variance, skewness, kurtosis) to the leaf and node distribution of the dendrogram. Simulations with self-gravity, larger magnetic field and higher sonic Mach number have dendrogram distributions with higher statistical moments. Application of the dendrogram to three-dimensional density cubes, also known as position-position-position (PPP) cubes, reveals that the dominant emission contours in PPP and PPV are related for supersonic gas but not for subsonic. We also explore the effects of smoothing, thermal broadening, and velocity resolution on the dendrograms in order to make our study more applicable to observational data. These results all point to hierarchical tree diagrams as being a promising additional tool for studying ISM turbulence and star forming regions for obtaining information on the degree of self-gravity, the Mach numbers and the complicated relationship between PPV and PPP data.

Burkhart, Blakesley; Lazarian, A. [Astronomy Department, University of Wisconsin, Madison, 475 N. Charter St., WI 53711 (United States); Goodman, Alyssa [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-78, Cambridge, MA 02138 (United States); Rosolowsky, Erik [University of British Columbia, Okanagan Campus, 3333 University Way, Kelowna BC V1V 1V7 (Canada)

2013-06-20T23:59:59.000Z

23

On the applicability of the minimal configured hierarchical fuzzy control and its relevance to function approximation  

Science Conference Proceedings (OSTI)

This paper presents an approach to minimal hierarchical fuzzy control systems design. It maintains the idea of distributing behaviors inside a fuzzy structure, while the minimal hierarchical fuzzy control is an effective procedure for dealing with systems ... Keywords: ANFIS, Behavioral decomposition, Control, Design, FIS, FLU, Function approximation, Hierarchical fuzzy systems, MCANHFLS, Methodology, RMSE, TSK

Taher M. Jelleli; Adel M. Alimi

2009-09-01T23:59:59.000Z

24

Hierarchical Phase Space Structure of Dark Matter Haloes: Tidal debris, Caustics, and Dark Matter annihilation  

E-Print Network (OSTI)

Most of the mass content of dark matter haloes is expected to be in the form of tidal debris. The density of debris is not constant, but rather can grow due to formation of caustics at the apocenters and pericenters of the orbit, or decay as a result of phase mixing. In the phase space, the debris assemble in a hierarchy which is truncated by the primordial temperature of dark matter. Understanding this phase structure can be of significant importance for the interpretation of many astrophysical observations and in particular dark matter detection experiments. With this purpose in mind, we develop a general theoretical framework to describe the hierarchical structure of the phase space of cold dark matter haloes. We do not make any assumption of spherical symmetry and/or smooth and continuous accretion. Instead, working with correlation functions in the action-angle space, we can fully account for the hierarchical structure (predicting a two-point correlation function ~ (\\Delta J)^{-1.6} in the action space), as well as the primordial discreteness of the phase space. As an application, we estimate the boost to the dark matter annihilation signal due to the structure of the phase space within virial radius: the boost due to the hierarchical tidal debris is of order unity, whereas the primordial discreteness of the phase structure can boost the total annihilation signal by up to an order of magnitude. The latter is dominated by the regions beyond 20% of the virial radius, and is largest for the recently formed haloes with the least degree of phase mixing.

Niayesh Afshordi; Roya Mohayaee; Edmund Bertschinger

2008-11-10T23:59:59.000Z

25

Hierarchical Structure Formation and Modes of Star Formation in Hickson Compact Group 31  

E-Print Network (OSTI)

The handful of low-mass, late-type galaxies that comprise Hickson Compact Group 31 is in the midst of complex, ongoing gravitational interactions, evocative of the process of hierarchical structure formation at higher redshifts. With sensitive, multicolor Hubble Space Telescope imaging, we characterize the large population of <10 Myr old star clusters that suffuse the system. From the colors and luminosities of the young star clusters, we find that the galaxies in HCG 31 follow the same universal scaling relations as actively star-forming galaxies in the local Universe despite the unusual compact group environment. Furthermore, the specific frequency of the globular cluster system is consistent with the low end of galaxies of comparable masses locally. This, combined with the large mass of neutral hydrogen and tight constraints on the amount of intragroup light, indicate that the group is undergoing its first epoch of interaction-induced star formation. In both the main galaxies and the tidal-dwarf candida...

Gallagher, S C; Elmegreen, D M; Chandar, R; English, J; Charlton, J C; Gronwall, C; Young, J; Tzanavaris, P; Johnson, K E; de Oliveira, C Mendes; Whitmore, B; Hornschemeier, A E; Maybhate, A; Zabludoff, Ann

2010-01-01T23:59:59.000Z

26

HIERARCHICAL HYBRID-MODEL BASED DESIGN, VERIFICATION, SIMULATION, AND SYNTHESIS OF MISSION CONTROL FOR AUTONOMOUS UNDERWATER VEHICLES.  

E-Print Network (OSTI)

??The objective of modeling, verification, and synthesis of hierarchical hybrid mission control for underwater vehicle is to (i) propose a hierarchical architecture for mission control… (more)

Bhattacharyya, Siddhartha

2005-01-01T23:59:59.000Z

27

Structured firewall design  

E-Print Network (OSTI)

Abstract. A firewall is a security guard placed at the point of entry between a private network and the outside Internet such that all incoming and outgoing packets have to pass through it. The function of a firewall is to examine every incoming or outgoing packet and decide whether to accept or discard it. This function is conventionally specified by a sequence of rules, where rules often conflict. To resolve conflicts, the decision for each packet is the decision of the first rule that the packet matches. The current practice of designing a firewall directly as a sequence of rules suffers from three types of major problems: (1) the consistency problem, which means that it is difficult to order the rules correctly; (2) the completeness problem, which means that it is difficult to ensure thorough consideration for all types of traffic; (3) the compactness problem, which means that it is difficult to keep the number of rules small (because some rules may be redundant and some rules may be combined into one rule). To achieve consistency, completeness, and compactness, we propose a new method called Structured Firewall Design, which consists of two steps. First, one designs a firewall using a Firewall Decision Diagram instead of a sequence of often conflicting rules. Second, a program converts the firewall decision diagram into a compact, yet functionally equivalent, sequence of rules. This method addresses the consistency problem because a firewall decision diagram is conflict-free. It addresses the completeness problem because the syntactic requirements of a firewall decision diagram force the designer to consider all types of traffic. It also addresses the compactness problem because in the second step we use two algorithms (namely FDD reduction and FDD marking) to combine rules together, and one algorithm (namely Firewall compaction) to remove redundant rules. Moreover, the techniques and algorithms presented in this paper are extensible to other rule-based systems such as IPsec rules.

Mohamed G. Gouda; Alex X. Liu

2007-01-01T23:59:59.000Z

28

Transmission Structure Foundation Design Guide  

Science Conference Proceedings (OSTI)

This guide contains the most current and comprehensive information for the design of foundations for overhead line structures. The guide covers the complete transmission structure foundation design process from the subsurface investigations and design of the foundations, to the construction and inspection of the foundation. Reference documents to assist transmission structure foundation designers in the development of specifications such as for subsurface investigations and foundation construction ...

2012-11-28T23:59:59.000Z

29

Interactive computer graphics displays for hierarchical data structures. [Description of THESGRAF, in FORTRAN IV for CDC and IBM computers  

SciTech Connect

An interactive computer graphical display program was developed as an aid to user visualization and manipulation of hierarchically structured data systems such as thesauri. In the present configuration, a thesaurus term and its primary and secondary conceptual neighbors are presented to the user in tree graph form on a CRT; the user then designates, via light pen or keyboard, any of the neighbors as the next term of interest and receives a new display centered on this term. By successive specification of broader, narrower, and related terms, the user can course rapidly through the thesaurus space and refine his search file. At any stage, he deals with a term-centered, conceptually meaningful picture of a localized portion of the thesaurus, and is freed from the artificial difficulties of handling the traditional alphabetized thesaurus. Intentional limitation of the associative range of each display frame, and the use of color, case, and interconnecting vectors to encode relationships among terms, enhance interpretability of the display. Facile movement through the term space, provided by interactive computation, allows the display to remain simple, and is an essential element of the system. 3 figures.

Cahn, D.F.; Murano, C.V.

1980-05-01T23:59:59.000Z

30

Converting the syntactic structures of hierarchical data to their semantic structures  

Science Conference Proceedings (OSTI)

Most of the existing methods for retrieving sub-page level information in an HTML document either rely on keyword-based searching or assume that the internal structure of the document is known beforehand. These techniques, however, are not suitable for ... Keywords: HTML, WWW, information visualization, semistructured data

Seung-Jin Lim; Yiu-Kai Ng

2000-01-01T23:59:59.000Z

31

Supporting multi-criteria decisions based on a hierarchical structure by taking advantage of acquired knowledge  

Science Conference Proceedings (OSTI)

In this paper, an approach to decision making is described. It combines a knowledge acquisition technique, a multi-attribute decision making technique, a validation technique and a machine learning algorithm. The suggested system is an extension of a ... Keywords: E-commerce assistant, Hierarchical decision support systems, Knowledge driven decision support systems, Product search assistant

J. J. Castro-Schez; R. Miguel; V. Herrera; J. A. Albusac

2013-01-01T23:59:59.000Z

32

Hierarchical Template of Porous Carbon for Multifunctional ...  

Science Conference Proceedings (OSTI)

Hierarchical Template of Porous Carbon for Multifunctional Applications · Interstitial Hydride ... Structurally Dynamic Metal Organic Frameworks for CO2 Capture.

33

Microparticles with hierarchical porosity  

SciTech Connect

The present disclosure provides oxide microparticles with engineered hierarchical porosity and methods of manufacturing the same. Also described are structures that are formed by templating, impregnating, and/or precipitating the oxide microparticles and method for forming the same. Suitable applications include catalysts, electrocatalysts, electrocatalysts support materials, capacitors, drug delivery systems, sensors and chromatography.

Petsev, Dimiter N; Atanassov, Plamen; Pylypenko, Svitlana; Carroll, Nick; Olson, Tim

2012-12-18T23:59:59.000Z

34

Unsupervised Structure Learning: Hierarchical Recursive Composition, Suspicious Coincidence and Competitive Exclusion  

E-Print Network (OSTI)

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

Long (Leo) Zhu; Chenxi Lin; Haoda Huang; Yuanhao Chen; Alan Yuille

2011-01-01T23:59:59.000Z

35

Unsupervised Structure Learning: Hierarchical Recursive Composition, Suspicious Coincidence and Competitive Exclusion  

E-Print Network (OSTI)

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

Zhu, Long Leo; Lin, Chenxi; Huang, Haoda; Chen, Yuanchao; Yuille, Alan

2008-01-01T23:59:59.000Z

36

Low-Energy Parking Structure Design (Brochure)  

Science Conference Proceedings (OSTI)

This guide provides design teams with best practices for parking structure energy efficiency in the form of goals for each design aspect that affects energy use.

Not Available

2013-01-01T23:59:59.000Z

37

Hierarchical image processing  

SciTech Connect

Most problems in image processing have structural aspects which are difficult to resolve using general methods. Use of heuristic methods is limited to cases where structural aspects are easy to resolve. An approach for hierarchical processing of images is described whereby structural aspects are resolved simultaneously with the analysis of data values. An effective use of a hierarchical structure puts strong restrictions upon information representation and operations. Information is represented in terms of compatibility of events, combined with a measure of confidence. Operations are of type symmetry operations, which allow data compression, context control and have a good descriptive power. The usefulness of these methods in image analysis and image processing is illustrated. 14 references.

Granlund, G.H.

1983-01-01T23:59:59.000Z

38

A Motion Control Algorithm for a Continuous Mining Machine Based on a Hierarchical Real-Time Control System Design  

E-Print Network (OSTI)

of underground coal mining. The development of control architectures for the control of the movement involved in the support of the United States Bureau of Mines' computer-assisted underground coal mining procedure for a hierarchical computer-assisted coal mining control system. Based on this previous work

39

A Motion Control Algorithm for a Continuous Mining Machine Based on a Hierarchical RealTime Control System Design  

E-Print Network (OSTI)

of underground coal mining. The development of control architectures for the control of the movement involved in the support of the United States Bureau of Mines' computer­assisted underground coal mining procedure for a hierarchical computer­assisted coal mining control system. Based on this previous work

40

Evidence for Hydro-Gravitational Structure Formation Theory versus Cold-Dark-Matter, Hierarchical-Clustering, and Jeans 1902  

E-Print Network (OSTI)

Observations are compared to conflicting predictions about self-gravitational structure formation by the hydro-gravitational theory (HGT) of Gibson 1996-2003 versus cold-dark-matter hierarchical-clustering-cosmology (CDMHCC) and the Jeans 1902 criterion. According to HGT, gravitational structures form immediately after mass-energy equality by plasma fragmentation at 30,000 years when viscous and weak turbulence forces first balance gravitational forces within the horizon L_H = ct < L_J = c/[3\\rho G]^1/2, contrary to the Jeans 1902 criterion. Buoyancy forces fossilize the 10^-12 s^-1 rate-of-strain and the 10^-17 kg m^-3 baryonic density. The non-baryonic dark matter (NBDM) diffuses into the voids rather than forming cold-dark-matter (CDM) halos required by CDMHCC. From HGT, supercluster-mass to galaxy-mass fragments exist at the plasma to gas transition, and these fragment further to form proto-globular-star clusters (PGCs) and planetary-mass primordial-fog-particles (PFPs): the baryonic dark matter of the interstellar-medium and inner-galaxy-dark-matter-halos, from which all planets and stars are formed by accretion (Gibson 1996, Schild 1996). From HGT and a rich cluster mass profile (Tyson and Fischer 1995), D_NBDM = 6 x10^28 m^2 s^-1, m_NBDM <= 10^-33 kg, and the NBDM forms outer-galaxy halos after 300,000 years.

Carl H. Gibson; Rudy Schild

2003-04-27T23:59:59.000Z

Note: This page contains sample records for the topic "hierarchical structure designed" 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

Robust carbon monolith having hierarchical porosity  

Science Conference Proceedings (OSTI)

A carbon monolith includes a robust carbon monolith characterized by a skeleton size of at least 100 nm, and a hierarchical pore structure having macropores and mesopores.

Dai, Sheng; Guiohon, Georges A; Liang, Chengdu

2013-02-05T23:59:59.000Z

42

Robust carbon monolith having hierarchical porosity  

DOE Patents (OSTI)

A carbon monolith includes a robust carbon monolith characterized by a skeleton size of at least 100 nm, and a hierarchical pore structure having macropores and mesopores.

Dai, Sheng (Knoxville, TN); Guiochon, Georges A. (Farragut, TN); Liang, Chengdu (Knoxville, TN)

2008-11-11T23:59:59.000Z

43

Patterns without patches: Hierarchical assembly of complex structures from simple building blocks  

E-Print Network (OSTI)

Nanoparticles with "sticky patches" have long been proposed as building blocks for the self-assembly of complex structures. The synthetic realizability of such patchy particles, however, greatly lags behind predictions of patterns they could form. Using computer simulations, we show that structures of the same genre can be obtained from a solution of simple isotropic spheres, provided control only over their sizes and a small number of binding affinities. In a first step, finite clusters of well-defined structure and composition emerge from natural dynamics with high yield. In effect a kind of patchy particle, these clusters can further assemble into a variety of complex superstructures, including filamentous networks, ordered sheets, and highly porous crystals.

Michael Grünwald; Phillip L. Geissler

2013-10-02T23:59:59.000Z

44

Design Fires for Structures Project  

Science Conference Proceedings (OSTI)

... eg, ISO 834), or prescribed, non-standard heating rates (provided by oil-burners). ... the design of the fuel delivery system (eg, natural gas burners) to ...

2013-11-13T23:59:59.000Z

45

Structural Integration Design For Enhanced Photoluminescence in ...  

Science Conference Proceedings (OSTI)

Author(s), Tongxiang Fan. On-Site Speaker (Planned), Tongxiang Fan. Abstract Scope, In this presentation, we present a structural integration design in butterfly  ...

46

Seismic design verification of LMFBR structures  

SciTech Connect

The report provides an assessment of the seismic design verification procedures currently used for nuclear power plant structures, a comparison of dynamic test methods available, and conclusions and recommendations for future LMFB structures.

1977-07-01T23:59:59.000Z

47

Scalable manufacturing of hierarchical nanostructures for thermal management  

E-Print Network (OSTI)

The focus of this thesis is a new simple and scalable process to make surface coatings that have multiple length scales, or hierarchical features. Typically, the formation of hierarchical structures involves multiple steps ...

Love, Christopher J., S.M. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

48

Hierarchical pose estimation for human gait analysis  

Science Conference Proceedings (OSTI)

Articulated structures like the human body have many degrees of freedom. This makes an evaluation of the configuration's likelihood very challenging. In this work we propose new linked hierarchical graphical models which are able to efficiently evaluate ... Keywords: Gait analysis, Hierarchical graphical model, Human pose estimation, Markov random fields

Jens Spehr; Simon Winkelbach; Friedrich M. Wahl

2012-05-01T23:59:59.000Z

49

Inferring hierarchical descriptions  

Science Conference Proceedings (OSTI)

We create a statistical model for inferring hierarchical term relationships about a topic, given only a small set of example web pages on the topic, without prior knowledge of any hierarchical information. The model can utilize either the full text of ... Keywords: cluster naming, feature selection, hierarchical relationships, statistical models, web analysis

Eric Glover; David M. Pennock; Steve Lawrence; Robert Krovetz

2002-11-01T23:59:59.000Z

50

A hierarchical systems knowledge representation framework  

E-Print Network (OSTI)

We present the design and implementation of a framework for storing and analysing knowledge about engineering systems. The hierarchical entity-relation-attribute model is useful for large data sets, in which it can abstract ...

Sylvester, Igor Andrade

2007-01-01T23:59:59.000Z

51

Integrated function structure and object-oriented design framework  

Science Conference Proceedings (OSTI)

Function structure is a popular product design approach in the mechanical design world. However, it does not currently provide an object-oriented design method for design of a product's software system. Also, function structure is limited in identifying ... Keywords: Concept design, Function structure, Object-oriented design, Product family design

J. C. Wu; K. Poppa; M. C. Leu; X. F. Liu

2012-06-01T23:59:59.000Z

52

Usability analysis and design structure matrix  

Science Conference Proceedings (OSTI)

Computer-based user interfaces are incorporated in important parts of many electronics products. Recently, new systematic approaches have been presented for analysing the usability of user interfaces. These approaches include simulation and time ... Keywords: Apple iPod, DSM, Sendo mobile phones, cell phones, design structure matrix, music players, usability analysis, user interfaces, web sales configuration

Petri Helo; Tauno Kekale; Satu Lautamaki

2009-01-01T23:59:59.000Z

53

Structural evaluation in the design of electrorefiner  

SciTech Connect

The electrorefiner is one piece of the process equipment for the Integral Fast Reactor (IFR) program. Its principal components include a primary vessel, a heater assembly, a support-structure assembly, a cover assembly, four electrode assemblies, four elevator and rotator assemblies, and a cover-gas system. In addition, there are various miscellaneous tools and fixtures. The electrorefiner is to be installed within an existing enclosed cell. Design requirements dictate that all equipment within the cell should not be anchored. To assess the integrity of the electrorefiner during operational and seismic loads, extensive structural analyses have been performed. This paper presents some of the major structural evaluations for the electrorefiner and its auxiliary equipment. Results show that the design code requirements are satisfied, and the integrity of the electrorefiner will not be jeopardized during operational and seismic loadings.

Wu, Ting-shu; Blomquist, C.A.; Herceg, J.E.

1995-06-01T23:59:59.000Z

54

AHTR Mechanical, Structural, And Neutronic Preconceptual Design  

SciTech Connect

This report provides an overview of the mechanical, structural, and neutronic aspects of the Advanced High Temperature Reactor (AHTR) design concept. The AHTR is a design concept for a large output Fluoride salt cooled High-temperature Reactor (FHR) that is being developed to enable evaluation of the technology hurdles remaining to be overcome prior to FHRs becoming a commercial reactor class. This report documents the incremental AHTR design maturation performed over the past year and is focused on advancing the design concept to a level of a functional, self-consistent system. The AHTR employs plate type coated particle fuel assemblies with rapid, off-line refueling. Neutronic analysis of the core has confirmed the viability of a 6-month 2-batch cycle with 9 weight-percent enriched uranium fuel. Refueling is intended to be performed automatically under visual guidance using dedicated robotic manipulators. The present design intent is for used fuel to be stored inside of containment for at least 6 months and then transferred to local dry wells for intermediate term, on-site storage. The mechanical and structural concept development effort has included an emphasis on transportation and constructability to minimize construction costs and schedule. The design intent is that all components be factory fabricated into rail transportable modules that are assembled into subsystems at an on-site workshop prior to being lifted into position using a heavy-lift crane in an open-top style construction. While detailed accident identification and response sequence analysis has yet to be performed, the design concept incorporates multiple levels of radioactive material containment including fully passive responses to all identified design basis or non-very-low frequency beyond design basis accidents. Key building design elements include: 1) below grade siting to minimize vulnerability to aircraft impact, 2) multiple natural circulation decay heat rejection chimneys, 3) seismic base isolation, and 4) decay heat powered back-up electricity generation. The report provides a preconceptual design of the manipulators, the fuel transfer system, and the salt transfer loops. The mechanical handling of the fuel and how it is accomplished without instrumentation inside the salt is described within the report. All drives for the manipulators reside outside the reactor top flange. The design has also taken into account the transportability of major components and how they will be assembled on site

Varma, Venugopal Koikal [ORNL; Holcomb, David Eugene [ORNL; Peretz, Fred J [ORNL; Bradley, Eric Craig [ORNL; Ilas, Dan [ORNL; Qualls, A L [ORNL; Zaharia, Nathaniel M [ORNL

2012-10-01T23:59:59.000Z

55

AHTR Mechanical, Structural, and Neutronic Preconceptual Design  

SciTech Connect

This report provides an overview of the mechanical, structural, and neutronic aspects of the Advanced High Temperature Reactor (AHTR) design concept. The AHTR is a design concept for a large output Fluoride salt cooled High-temperature Reactor (FHR) that is being developed to enable evaluation of the technology hurdles remaining to be overcome prior to FHRs becoming an option for commercial reactor deployment. This report documents the incremental AHTR design maturation performed over the past year and is focused on advancing the design concept to a level of a functional, self-consistent system. The reactor concept development remains at a preconceptual level of maturity. While the overall appearance of an AHTR design is anticipated to be similar to the current concept, optimized dimensions will differ from those presented here. The AHTR employs plate type coated particle fuel assemblies with rapid, off-line refueling. Neutronic analysis of the core has confirmed the viability of a 6-month two-batch cycle with 9 wt. % enriched uranium fuel. Refueling is intended to be performed automatically under visual guidance using dedicated robotic manipulators. The report includes a preconceptual design of the manipulators, the fuel transfer system, and the used fuel storage system. The present design intent is for used fuel to be stored inside of containment for at least six months and then transferred to local dry wells for intermediate term, on-site storage. The mechanical and structural concept development effort has included an emphasis on transportation and constructability to minimize construction costs and schedule. The design intent is that all components be factory fabricated into rail transportable modules that are assembled into subsystems at an on-site workshop prior to being lifted into position using a heavy-lift crane in an open-top style construction. While detailed accident identification and response sequence analysis has yet to be performed, the design concept incorporates fully passive responses to all identified design basis or non-very-low frequency beyond design basis accidents as well as multiple levels of radioactive material containment. Key building design elements include (1) below grade siting to minimize vulnerability to aircraft impact, (2) multiple natural circulation decay heat rejection chimneys, (3) seismic base isolation, and (4) decay heat powered back-up electricity generation.

Varma, V.K.; Holcomb, D.E.; Peretz, F.J.; Bradley, E.C.; Ilas, D.; Qualls, A.L.; Zaharia, N.M.

2012-09-15T23:59:59.000Z

56

Elements of a pragmatic approach for dealing with bias and uncertainty in experiments through predictions : experiment design and data conditioning; %22real space%22 model validation and conditioning; hierarchical modeling and extrapolative prediction.  

Science Conference Proceedings (OSTI)

This report explores some important considerations in devising a practical and consistent framework and methodology for utilizing experiments and experimental data to support modeling and prediction. A pragmatic and versatile 'Real Space' approach is outlined for confronting experimental and modeling bias and uncertainty to mitigate risk in modeling and prediction. The elements of experiment design and data analysis, data conditioning, model conditioning, model validation, hierarchical modeling, and extrapolative prediction under uncertainty are examined. An appreciation can be gained for the constraints and difficulties at play in devising a viable end-to-end methodology. Rationale is given for the various choices underlying the Real Space end-to-end approach. The approach adopts and refines some elements and constructs from the literature and adds pivotal new elements and constructs. Crucially, the approach reflects a pragmatism and versatility derived from working many industrial-scale problems involving complex physics and constitutive models, steady-state and time-varying nonlinear behavior and boundary conditions, and various types of uncertainty in experiments and models. The framework benefits from a broad exposure to integrated experimental and modeling activities in the areas of heat transfer, solid and structural mechanics, irradiated electronics, and combustion in fluids and solids.

Romero, Vicente Jose

2011-11-01T23:59:59.000Z

57

Structural Design Challenges in Design Certification Applications for New Reactors  

SciTech Connect

The licensing framework established by the U.S. Nuclear Regulatory Commission under Title 10 of the Code of Federal Regulations (10 CFR) Part 52, “Licenses, Certifications, and Approvals for Nuclear Power Plants,” provides requirements for standard design certifications (DCs) and combined license (COL) applications. The intent of this process is the early reso- lution of safety issues at the DC application stage. Subsequent COL applications may incorporate a DC by reference. Thus, the COL review will not reconsider safety issues resolved during the DC process. However, a COL application that incorporates a DC by reference must demonstrate that relevant site-specific de- sign parameters are confined within the bounds postulated by the DC, and any departures from the DC need to be justified. This paper provides an overview of structural design chal- lenges encountered in recent DC applications under the 10 CFR Part 52 process, in which the authors have participated as part of the safety review effort.

Miranda, M.; Braverman, J.; Wei, X.; Hofmayer, C.; Xu, J.

2011-07-17T23:59:59.000Z

58

Applying Object-Oriented Design to Structured Graphics  

E-Print Network (OSTI)

Structured graphics is useful for building applications that use a direct manipulation metaphor. Objectoriented languages offer inheritance, encapsulation, and runtime binding of operations to objects. Unfortunately, standard structured graphics packages do not use an object-oriented model, and object-oriented systems do not provide general-purpose structured graphics, relying instead on low-level graphics primitives. An object-oriented approach to structured graphics can give application programmers the benefits of both paradigms. We have implemented a two-dimensional structured graphics library in C++ that presents an object-oriented model to the programmer. The graphic class defines a general graphical object from which all others are derived. The picture subclass supports hierarchical composition of graphics. Programmers can define new graphical objects either statically by subclassing or dynamically by composing instances of existing classes. We have used both this library and an...

John M. Vlissides; Mark A. Linton

1988-01-01T23:59:59.000Z

59

Hierarchical Nanoceramics for Industrial Process Sensors  

SciTech Connect

This project developed a robust, tunable, hierarchical nanoceramics materials platform for industrial process sensors in harsh-environments. Control of material structure at multiple length scales from nano to macro increased the sensing response of the materials to combustion gases. These materials operated at relatively high temperatures, enabling detection close to the source of combustion. It is anticipated that these materials can form the basis for a new class of sensors enabling widespread use of efficient combustion processes with closed loop feedback control in the energy-intensive industries. The first phase of the project focused on materials selection and process development, leading to hierarchical nanoceramics that were evaluated for sensing performance. The second phase focused on optimizing the materials processes and microstructures, followed by validation of performance of a prototype sensor in a laboratory combustion environment. The objectives of this project were achieved by: (1) synthesizing and optimizing hierarchical nanostructures; (2) synthesizing and optimizing sensing nanomaterials; (3) integrating sensing functionality into hierarchical nanostructures; (4) demonstrating material performance in a sensing element; and (5) validating material performance in a simulated service environment. The project developed hierarchical nanoceramic electrodes for mixed potential zirconia gas sensors with increased surface area and demonstrated tailored electrocatalytic activity operable at high temperatures enabling detection of products of combustion such as NOx close to the source of combustion. Methods were developed for synthesis of hierarchical nanostructures with high, stable surface area, integrated catalytic functionality within the structures for gas sensing, and demonstrated materials performance in harsh lab and combustion gas environments.

Ruud, James, A.; Brosnan, Kristen, H.; Striker, Todd; Ramaswamy, Vidya; Aceto, Steven, C.; Gao, Yan; Willson, Patrick, D.; Manoharan, Mohan; Armstrong, Eric, N., Wachsman, Eric, D.; Kao, Chi-Chang

2011-07-15T23:59:59.000Z

60

Prediction and Design of Materials from Crystal Structures to ...  

Science Conference Proceedings (OSTI)

Presentation Title, Prediction and Design of Materials from Crystal Structures to ... of structure formation by computation may accelerate materials discovery and design. ... to cubic when increasing the ligand concentration during synthesis.

Note: This page contains sample records for the topic "hierarchical structure designed" 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

Structural Design and Attachment Mechanisms of Aquatic Insects  

Science Conference Proceedings (OSTI)

Biomechanical Approaches to Study Red Blood Cell-borne Diseases ... Structural Integration Design For Enhanced Photoluminescence in Butterfly Wing.

62

Hierarchical geometric models for visible surface algorithms  

Science Conference Proceedings (OSTI)

The geometric structure inherent in the definition of the shapes of three-dimensional objects and environments is used not just to define their relative motion and placement, but also to assist in solving many other problems of systems for producing ... Keywords: geometric models, hidden surface algorithms, hierarchical data structures, visible surface algorithms

James H. Clark

1976-10-01T23:59:59.000Z

63

Conceptual Phase Structural Design Tool for Microsatellites  

E-Print Network (OSTI)

Gaining traction or momentum in the conceptual design phase for a complex system can be an arduous and daunting process, whether the complex system being designed is a satellite, airplane, car, or one of countless other ...

McLinko, Ryan (Ryan M.)

2011-01-01T23:59:59.000Z

64

(NATIONAL SPHERICAL TORUS EXPERIMENT) STRUCTURAL DESIGN CRITERIA  

E-Print Network (OSTI)

/or MIL-HDBK- 5). If a small database exists for a candidate material considered for a design component

Princeton Plasma Physics Laboratory

65

Hybrid and Hierarchical Composite Materials  

Science Conference Proceedings (OSTI)

Chang Soo Kim, University of Wisconsin -Milwaukee. Scope, Hybrid and hierarchical composite materials have several advantageous characteristics that  ...

66

The design and construction of fabric structures  

E-Print Network (OSTI)

In its short history, fabric structures have fascinated architects and engineers alike. Architects appreciate their unusual shapes and forms while engineers delight in their "pure" structural expression. Capable of spanning ...

Fang, Rosemarie

2009-01-01T23:59:59.000Z

67

Toolkit Design for Interactive Structured Graphics  

E-Print Network (OSTI)

for listening to low-level events. Some toolkits such as Tcl/Tk [19] include a "structured canvas" component

Golbeck, Jennifer

68

Topology design of two-dimensional continuum structures using isolines  

Science Conference Proceedings (OSTI)

This paper presents the algorithm for the topological design of two-dimensional structures using isolines called isolines topology design (ITD). The topology and the shape of the design depend on an iterative algorithm, which continually adds and removes ... Keywords: 2D continuum, Evolutionary algorithm, Fixed grid, Isolines, Topology design, Topology optimisation

Mariano Victoria; Pascual Martí; Osvaldo M. Querin

2009-01-01T23:59:59.000Z

69

Multidisciplinary structural design and optimization for performance, cost, and flexibility  

E-Print Network (OSTI)

Reducing cost and improving performance are two key factors in structural design. In the aerospace and automotive industries, this is particularly true with respect to design criteria such as strength, stiffness, mass, ...

Nadir, William David, 1979-

2005-01-01T23:59:59.000Z

70

Practical simulation of hierarchical brittle fracture  

Science Conference Proceedings (OSTI)

A novel practical method for brittle fracture simulation is presented. Our fracture model is represented by a tree structure, and all elementary fracture pieces are hierarchically connected. Each node in a fracture tree has a glue table to define connections ... Keywords: fluid, fracture, rigid body

Seungtaik Oh; Seunghyup Shin; Hyeryeong Jun

2012-05-01T23:59:59.000Z

71

Structural Design Requirement on the Tsunami Evacuation ...  

Science Conference Proceedings (OSTI)

... depth to the design inundation depth in a hydro static tsunami ... of tsunami wave pressure,” “2.4 Calculation of tsunami wave power,” “2.5 Calculation ...

2013-02-20T23:59:59.000Z

72

Lattice Tower Design of Offshore Wind Turbine Support Structures.  

E-Print Network (OSTI)

??Optimal design of support structure including foundation and turbine tower is among the most critical challenges for offshore wind turbine. With development of offshore wind… (more)

Gong, W.

2011-01-01T23:59:59.000Z

73

Structural Design Methodology Based on Concepts of Uncertainty  

Science Conference Proceedings (OSTI)

In this report, an approach to damage-tolerant aircraft structural design is proposed based on the concept of an equivalent "Level of Safety" that incorporates past service experience in the design of new structures. The discrete "Level of Safety" for ...

Lin K. Y.; Du Jiaji; Rusk David

2000-02-01T23:59:59.000Z

74

Program design in file structures [by students  

Science Conference Proceedings (OSTI)

The importance of emphasizing design in programming stems from the desire to train students in thinking more about solving the problem than programming the problem. Although sitting in front of the computer causes the student to think that he or she ...

S. A. Mengel; D. A. Tappan

1995-11-01T23:59:59.000Z

75

Design of Spintronic Materials with Simple Structures  

SciTech Connect

A brief comparison of conventional electronics and spintronics is given. The key features of half metallic binary compounds with the zincblende structure are presented, using MnAs as an example. We discuss the interactions responsible for the half metallic properties. Special properties of superlattices and a digital ferromagnetic heterostructure incorporating zincblende half metals are also discussed.

Fong, C Y; Qian, M C; Liu, K; Yang, L H; Pask, J E

2007-05-03T23:59:59.000Z

76

Hierarchical and size dependent mechanical properties of silica and silicon nanostructures inspired by diatom algae  

E-Print Network (OSTI)

Biology implements fundamental principles that allow for attractive mechanical properties, as observed in biomineralized structures. For example, diatom algae contain nanoporous hierarchical silicified shells that provide ...

García, Andre Phillipé

2010-01-01T23:59:59.000Z

77

Hierarchical Bayesian inference in the brain: psychological models and neural implementation  

E-Print Network (OSTI)

A Hierarchical Bayesian inference structure by recursiveas a mechanism for performing Bayesian inference 15 Exemplarof sequential Bayesian inference The sequential estimation

Shi, Lei

2009-01-01T23:59:59.000Z

78

Probability based load combinations for design of category I structures  

SciTech Connect

This paper discusses a reliability analysis method and a procedure for developing the load combination design criteria for category I structures. For safety evaluation of category I concrete structures under various static and dynamic loads, a probability-based reliability analysis method has been developed. This reliability analysis method is also used as a tool for determining the load factors for design of category I structures. In this paper, the load combinations for design of concrete containments, corresponding to a target limit state probability of 1.0 x 10/sup -6/ in 4 years, are described. A comparison of containments designed using the ASME code and the proposed design criteria is also presented.

Reich, M.; Hwang, H.

1985-01-01T23:59:59.000Z

79

Transmission Structure Design Features to Facilitate Construction and Maintenance  

Science Conference Proceedings (OSTI)

The power industry wants to construct reliable and cost-effective overhead lines. A reliable and cost-effective line requires not only that the line and structures meet design criteria for strength, clearances, and electrical considerations, but also that it can be constructed and maintained easily and safely. Design and construction practices should therefore go hand in hand. A minor change in design could have a large impact on construction and maintenance costs. The various departments within a ...

2013-11-18T23:59:59.000Z

80

Power gating design for standard-cell-like structured ASICs  

Science Conference Proceedings (OSTI)

Structured ASIC has been introduced to bridge the power, performance, area and design cost gaps between ASIC and FPGA. As technology scales, leakage power consumption becomes a serious problem. Among the leakage power reduction techniques, power gating ... Keywords: low power, power-gating, structured ASIC, via-configurable

Sin-Yu Chen; Rung-Bin Lin; Hui-Hsiang Tung; Kuen-Wey Lin

2010-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "hierarchical structure designed" 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

SSHLDA: a semi-supervised hierarchical topic model  

Science Conference Proceedings (OSTI)

Supervised hierarchical topic modeling and unsupervised hierarchical topic modeling are usually used to obtain hierarchical topics, such as hLLDA and hLDA. Supervised hierarchical topic modeling makes heavy use of the information from observed hierarchical ...

Xian-Ling Mao; Zhao-Yan Ming; Tat-Seng Chua; Si Li; Hongfei Yan; Xiaoming Li

2012-07-01T23:59:59.000Z

82

A design guide and specification for small explosive containment structures  

SciTech Connect

The design of structural containments for testing small explosive devices requires the designer to consider the various aspects of the explosive loading, i.e., shock and gas or quasistatic pressure. Additionally, if the explosive charge has the potential of producing damaging fragments, provisions must be made to arrest the fragments. This may require that the explosive be packed in a fragment attenuating material, which also will affect the loads predicted for containment response. Material also may be added just to attenuate shock, in the absence of fragments. Three charge weights are used in the design. The actual charge is used to determine a design fragment. Blast loads are determined for a {open_quotes}design charge{close_quotes}, defined as 125% of the operational charge in the explosive device. No yielding is permitted at the design charge weight. Blast loads are also determined for an over-charge, defined as 200% of the operational charge in the explosive device. Yielding, but no failure, is permitted at this over-charge. This guide emphasizes the calculation of loads and fragments for which the containment must be designed. The designer has the option of using simplified or complex design-analysis methods. Examples in the guide use readily available single degree-of-freedom (sdof) methods, plus static methods for equivalent dynamic loads. These are the common methods for blast resistant design. Some discussion of more complex methods is included. Generally, the designer who chooses more complex methods must be fully knowledgeable in their use and limitations. Finally, newly fabricated containments initially must be proof tested to 125% of the operational load and then inspected at regular intervals. This specification provides guidance for design, proof testing, and inspection of small explosive containment structures.

Marchand, K.A.; Cox, P.A.; Polcyn, M.A. [Southwest Research Institute, San Antonio, TX (United States)

1994-12-01T23:59:59.000Z

83

Hierarchical sizing and biasing of analog firm intellectual properties  

Science Conference Proceedings (OSTI)

A hierarchical sizing and biasing methodology for analog firm intellectual properties (IPs) is presented. An analog firm IP designates an unsized transistor netlist of an analog circuit. The methodology sizes and biases an analog firm IP by automatically ... Keywords: Analog design, Analog firm IP, Modeling, Reuse, Simulation, Sizing, Synthesis

Ramy Iskander; Marie-Minerve LouëRat; Andreas Kaiser

2013-03-01T23:59:59.000Z

84

Design-for-empowerment-for-design : computational structures for design democratization  

E-Print Network (OSTI)

The vision to engage non-architects in the design of their habitat through the mediation of computer aids, dates back to the early computational era (1960s-1970s) and is currently being recast under cyber-cultural and ...

Vardouli, Theodora

2012-01-01T23:59:59.000Z

85

Design of Light Weight Structure for Wind Turbine Tower by Using ...  

Science Conference Proceedings (OSTI)

This paper reports a new design scheme of light weight structure for wind turbine tower. This design scheme is based on the integration of the nano-structured ...

86

A geometric modelling framework for conceptual structural design from early digital architectural models  

Science Conference Proceedings (OSTI)

Computer support for conceptual structural design is still ineffective. This is due, in part, to the fact that current computer applications do not recognize that structural design and architectural design are highly interdependent processes, particularly ... Keywords: Architectural design, Conceptual structural design, Geometric modeling, Integrated design

Rodrigo Mora; Claude Bédard; Hugues Rivard

2008-04-01T23:59:59.000Z

87

Understanding Thin Film Structure for the Rational Design of  

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

Understanding Thin Film Structure for the Rational Design of Understanding Thin Film Structure for the Rational Design of High-performance Organic Semiconductors for Plastic Electronics Organic semiconductors are attracting considerable research interest due to their potential applications in low-cost electronics such as organic light emitting diode (OLED) displays, RF identification tags (RFID), smart cards and electronic paper. The development of p-conjugated materials, which are composed of alternating single and double chemical bonds, are the foundation of these applications. In the past decade research in this field has progressed to the extent that desirable charge transport in the organic semiconductor film in organic thin film transistors (OTFT) can be achieved through molecular design by selective placement of electron-rich, electron-withdrawing, and aromatic groups in different parts of the molecule. Although the electronic properties are easily tuned by molecular design, the molecular packing within the thin film and the film microstructure have a significant influence on the OTFT performance. Despite this importance, this interrelationship between molecular structure, thin film molecular packing and charge transport are only poorly understood.

88

Hierarchical implementation of a wireless communications system  

E-Print Network (OSTI)

Personal communications devices, such as the cellular phone, currently dominate the field of wireless communications. Product specifications such as weight, battery life, and transmission capacity pertain to consumer and marketing requirements, but do not readily suggest engineering requirements such as communications protocols, component requirements, and integrated circuit techniques. During the design and implementation phases of large mixed-signal integrated circuit systems, engineers need a method to determine these requirements and verify proper system performance without having to perform several iterations of the expensive integrated circuit fabrication process. The purpose of this thesis is to illustrate a strategy for implementing large mixed-signal systems using a hierarchical modeling approach that connects the high-level system design to the low-level transistor design. This work describes the design and implementation of portions of a transceiver similar to that used in the Personal Communications System (PCS). Several components of the transceiver have been fully implemented, sent for fabrication, and subsequently tested. The technique used to design and implement the transceiver employs top-down design and three levels of modeling to form a complete hierarchical implementation. Behavioral modeling is used at the system-level. The second level of modeling adopts digital and analog macromodeling for individual components. Transistor-level circuit simulators and device models are used in the lowest level of modeling. Implementation of large mixed-signal systems, such as wireless communications devices, is likely to result in single-chip solutions in the near future. As a result, design and implementation techniques must be devised which allow the designer to accurately and inexpensively determine and optimize transistor-level circuits from system requirements. The results of this work show that the techniques presented in this thesis can assist the mixed-signal system designer in determining engineering requirements and verifying proper system operation.

Mayhugh, Terry L

2000-01-01T23:59:59.000Z

89

Design of Accelerator Online Simulator Server Using Structured Data  

Science Conference Proceedings (OSTI)

Model based control plays an important role for a modern accelerator during beam commissioning, beam study, and even daily operation. With a realistic model, beam behaviour can be predicted and therefore effectively controlled. The approach used by most current high level application environments is to use a built-in simulation engine and feed a realistic model into that simulation engine. Instead of this traditional monolithic structure, a new approach using a client-server architecture is under development. An on-line simulator server is accessed via network accessible structured data. With this approach, a user can easily access multiple simulation codes. This paper describes the design, implementation, and current status of PVData, which defines the structured data, and PVAccess, which provides network access to the structured data.

Shen, Guobao; /Brookhaven; Chu, Chungming; /SLAC; Wu, Juhao; /SLAC; Kraimer, Martin; /Argonne

2012-07-06T23:59:59.000Z

90

Durability-based design criteria for an automotive structural composite  

DOE Green Energy (OSTI)

Before composite structures can be widely used in automotive applications, their long-term durability must be assured. The Durability of Lightweight Composite Structures Project at Oak Ridge National Laboratory was established by the US Department of Energy to help provide that assurance. The project is closely coordinated with the Automotive Composites Consortium. The experimentally-based, durability-driven design criteria described in this paper are the result of the initial project thrust. The criteria address a single reference composite, which is an SRIM (Structural Reaction Injection Molded) polyurethane, reinforced with continuous strand, swirl-mat E-glass fibers. The durability issues addressed include the effects of cyclic and sustained loadings, temperature, automotive fluid environments, and low-energy impacts (e.g., tool drops and roadway kickups) on strength, stiffness, and deformation. The criteria provide design analysis guidance, a multiaxial strength criterion, time-independent and time-dependent allowable stresses, rules for cyclic loading, and damage tolerance design guidance. Environmental degradation factors and the degrading effects of prior loadings are included. Efforts are currently underway to validate the criteria by application to a second random-glass-fiber composite. Carbon-fiber composites are also being addressed.

Corum, J.M.; Battiste, R.L.; Brinkman, C.R.; Ren, W.; Ruggles, M.B.; Yahr, G.T.

1998-11-01T23:59:59.000Z

91

Studies on Hazard Characterization for Performance-based Structural Design  

E-Print Network (OSTI)

Performance-based engineering (PBE) requires advances in hazard characterization, structural modeling, and nonlinear analysis techniques to fully and efficiently develop the fragility expressions and other tools forming the basis for risk-based design procedures. This research examined and extended the state-of-the-art in hazard characterization (wind and surge) and risk-based design procedures (seismic). State-of-the-art hurricane models (including wind field, tracking and decay models) and event-based simulation techniques were used to characterize the hurricane wind hazard along the Texas coast. A total of 10,000 years of synthetic hurricane wind speed records were generated for each zip-code in Texas and were used to statistically characterize the N-year maximum hurricane wind speed distribution for each zip-code location and develop design non-exceedance probability contours for both coastal and inland areas. Actual recorded wind and surge data, the hurricane wind field model, hurricane size parameters, and a measure of storm kinetic energy were used to develop wind-surge and wind-surge-energy models, which can be used to characterize the wind-surge hazard at a level of accuracy suitable for PBE applications. These models provide a powerful tool to quickly and inexpensively estimate surge depths at coastal locations in advance of a hurricane landfall. They also were used to create surge hazard maps that provide storm surge height non-exceedance probability contours for the Texas coast. The simulation tools, wind field models, and statistical analyses, make it possible to characterize the risk-consistent hurricane events considering both hurricane intensity and size. The proposed methodology for event-based hurricane hazard characterization, when coupled with a hurricane damage model, can also be used for regional loss estimation and other spatial impact analyses. In considering seismic hazard, a risk-consistent framework for displacement-based seismic design of engineered multistory woodframe structures was developed. Specifically, a database of probability-based scale factors which can be used in a direct displacement design (DDD) procedure for woodframe buildings was created using nonlinear time-history analyses with suitably scaled ground motions records. The resulting DDD procedure results in more risk-consistent designs and therefore advances the state-of-the-art in displacement-based seismic design of woodframe structures.

Wang, Yue

2010-05-01T23:59:59.000Z

92

Hierarchical Microporous Materials: Rational and Designable ...  

Science Conference Proceedings (OSTI)

Microstructural Evolution of SnS Thin Films Grown by Electrodeposition · Morphology Engineering of 1D, 2D and 3D TiO2 Nanostructures and Their Application ...

93

Hazard consistent structural demands and in-structure design response spectra  

Science Conference Proceedings (OSTI)

Current analysis methodology for the Soil Structure Interaction (SSI) analysis of nuclear facilities is specified in ASCE Standard 4. This methodology is based on the use of deterministic procedures with the intention that enough conservatism is included in the specified procedures to achieve an 80% probability of non-exceedance in the computed response of a Structure, System. or Component for given a mean seismic design input. Recently developed standards are aimed at achieving performance-based, risk consistent seismic designs that meet specified target performance goals. These design approaches rely upon accurately characterizing the probability (hazard) level of system demands due to seismic loads consistent with Probabilistic Seismic Hazard Analyses. This paper examines the adequacy of the deterministic SSI procedures described in ASCE 4-98 to achieve an 80th percentile of Non-Exceedance Probability (NEP) in structural demand, given a mean seismic input motion. The study demonstrates that the deterministic procedures provide computed in-structure response spectra that are near or greater than the target 80th percentile NEP for site profiles other than those resulting in high levels of radiation damping. The deterministic procedures do not appear to be as robust in predicting peak accelerations, which correlate to structural demands within the structure.

Houston, Thomas W [Los Alamos National Laboratory; Costantino, Michael C [Los Alamos National Laboratory; Costantino, Carl J [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

94

A Framework for Visualizing Hierarchical Computations  

E-Print Network (OSTI)

Introduction Researchers doing scientific computations are attempting to accurately model physical phenomenon. When those physical phenomena take place at a variety of different scales it can be more efficient and accurate to model them at different levels of detail in an adaptive manner. Two groups here in the National Energy Research Scientific Computing center [NERSC] at the Lawrence Berkeley National Laboratory [LBNL] are doing just that. One group is headed by John Bell (the Center for Computational Sciences and Engineering, [CCSE]) and the other is headed by Phil Colella (the Applied Numerical Algorithms Group, [ANAG]). Both are doing computations using similar adaptive mesh refinement (AMR) techniques. Since the term "AMR" can mean a variety of things to researchers it should be clarified that we use it to refer exclusively to block structured AMR as defined in a paper by Berger and Colella [Berger]. Given that the researchers have already defined a hierarchical structure for

Terry J. Ligocki; Brian Van Straalen; John M. Shalf; Gunther H. Weber; Bernd Hamann

2003-01-01T23:59:59.000Z

95

Demonstrating Structural Adequacy of Nuclear Power Plant Containment Structures for Beyond Design-Basis Pressure Loadings  

SciTech Connect

ABSTRACT Demonstrating the structural integrity of U.S. nuclear power plant (NPP) containment structures, for beyond design-basis internal pressure loadings, is necessary to satisfy Nuclear Regulatory Commission (NRC) requirements and performance goals. This paper discusses methods for demonstrating the structural adequacy of the containment for beyond design-basis pressure loadings. Three distinct evaluations are addressed: (1) estimating the ultimate pressure capacity of the containment structure (10 CFR 50 and US NRC Standard Review Plan, Section 3.8) ; (2) demonstrating the structural adequacy of the containment subjected to pressure loadings associated with combustible gas generation (10 CFR 52 and 10 CFR 50); and (3) demonstrating the containment structural integrity for severe accidents (10 CFR 52 as well as SECY 90-016, SECY 93-087, and related NRC staff requirements memoranda (SRMs)). The paper describes the technical basis for specific aspects of the methods presented. It also presents examples of past issues identified in licensing activities related to these evaluations.

Braverman, J.I.; Morante, R.

2010-07-18T23:59:59.000Z

96

Standardization of a Hierarchical Transactive Control System  

SciTech Connect

The authors describe work they have conducted toward the generalization and standardization of the transactive control approach that was first demonstrated in the Olympic Peninsula Project for the management of a transmission constraint. The newly generalized approach addresses several potential shortfalls of the prior approach: First, the authors have formalized a hierarchical node structure which defines the nodes and the functional signal pathways between these nodes. Second, by fully generalizing the inputs, outputs, and functional responsibilities of each node, the authors make the approach available to a much wider set of responsive assets and operational objectives. Third, the new, generalized approach defines transactive signals that include the predicted day-ahead future. This predictive feature allows the market-like bids and offers to become resolved iteratively over time, thus allowing the behaviors of responsive assets to be called upon both for the present and as future dispatch decisions are being made. The hierarchical transactive control approach is a key feature of a proposed Pacific Northwest smart grid demonstration.

Hammerstrom, Donald J.; Oliver, Terry V.; Melton, Ronald B.; Ambrosio, Ron

2010-12-03T23:59:59.000Z

97

Efficient scalable algorithms for hierarchically semiseparable matrices  

SciTech Connect

Hierarchically semiseparable (HSS) matrix algorithms are emerging techniques in constructing the superfast direct solvers for both dense and sparse linear systems. Here, we develope a set of novel parallel algorithms for the key HSS operations that are used for solving large linear systems. These include the parallel rank-revealing QR factorization, the HSS constructions with hierarchical compression, the ULV HSS factorization, and the HSS solutions. The HSS tree based parallelism is fully exploited at the coarse level. The BLACS and ScaLAPACK libraries are used to facilitate the parallel dense kernel operations at the ne-grained level. We have appplied our new parallel HSS-embedded multifrontal solver to the anisotropic Helmholtz equations for seismic imaging, and were able to solve a linear system with 6.4 billion unknowns using 4096 processors, in about 20 minutes. The classical multifrontal solver simply failed due to high demand of memory. To our knowledge, this is the first successful demonstration of employing the HSS algorithms in solving the truly large-scale real-world problems. Our parallel strategies can be easily adapted to the parallelization of the other rank structured methods.

Wang, Shen; Xia, Jianlin; Situ, Yingchong; Hoop, Maarten V. de

2011-09-14T23:59:59.000Z

98

Hierarchical Microstructures in CZT  

Science Conference Proceedings (OSTI)

Advanced characterization tools, such as electron backscatter diffraction and transmitted IR microscopy, are being applied to study critical microstructural features and orientation relations in as-grown CZT crystals to aid in understanding the relation between structure and properties in radiation detectors. Even carefully prepared single crystals of CZT contain regions of slight misorientation, Te-particles, and dislocation networks that must be understood for more accurate models of detector response. This paper describes initial research at PNNL into the hierarchy of microstructures observed in CZT grown via the vertical gradient freeze or vertical Bridgman method at PNNL and WSU.

Sundaram, S. K.; Henager, Charles H.; Edwards, Danny J.; Schemer-Kohrn, Alan L.; Bliss, Mary; Riley, Brian J.; Toloczko, Mychailo B.; Lynn, Kelvin G.

2011-10-01T23:59:59.000Z

99

RISCE—a reduced instruction set circuit extractor for hierarchical VLSI layout verification  

Science Conference Proceedings (OSTI)

We present a circuit extractor preserving the hierarchical layout structure isomorphically. As opposed to existing extractors, our approach permits all cell overlaps which are electrically meaningful. New mask operations based on stretched geometries ...

Volker Henkel; Ulrich Golze

1988-06-01T23:59:59.000Z

100

Multi-Physics Functional Design of HeteroFoaM Nanomaterials for ...  

Science Conference Proceedings (OSTI)

Hierarchical Microporous Materials: Rational and Designable Heterogeneous Catalysts for Renewable Energy · Improved Design of Metal-Organic Framework

Note: This page contains sample records for the topic "hierarchical structure designed" 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

Combinatorial structures for design of wireless sensor networks  

Science Conference Proceedings (OSTI)

Combinatorial designs are very effective tools for managing keys in an infrastructure where power and memory are two major constraints. None of the present day wireless technologies takes the advantage of combinatorial designs. In this paper, we have ... Keywords: combinatorial design, key predistribution, projective plane, sensor network, transversal design

Dibyendu Chakrabarti; Jennifer Seberry

2006-06-01T23:59:59.000Z

102

Hierarchically Ordered Porous Carbon Films for Commercial ...  

for kinetic adsorption. The ORNL invention offers both a method for making new, hierarchically ordered porous carbon films and describes a capacitive deionization

103

Challenges in computer applications for ship and floating structure design and analysis  

Science Conference Proceedings (OSTI)

This paper presents a review on the key research areas in the design and analysis of ships and floating structures. The major areas of computer application are identified in several stages of ship/floating structure design and analysis with the principal ... Keywords: Boundary element method, Computational fluid dynamics, Computer applications, Computer-aided ship and floating structure design, Finite element analysis, Hydrodynamics, Production, Structures

R. Sharma; Tae-wan Kim; Richard Lee Storch; Hans (J. J. ) Hopman; Stein Ove Erikstad

2012-03-01T23:59:59.000Z

104

A Bayesian experimental design approach to structural health monitoring  

Science Conference Proceedings (OSTI)

Optimal system design for SHM involves two primarily challenges. The first is the derivation of a proper performance function for a given system design. The second is the development of an efficient optimization algorithm for choosing a design that maximizes, or nearly maximizes the performance function. In this paper we will outline how an SHM practitioner can construct the proper performance function by casting the entire design problem into a framework of Bayesian experimental design. The approach demonstrates how the design problem necessarily ties together all steps of the SHM process.

Farrar, Charles [Los Alamos National Laboratory; Flynn, Eric [UCSD; Todd, Michael [UCSD

2010-01-01T23:59:59.000Z

105

Mechanics of Hierarchical Structures in Bone  

Science Conference Proceedings (OSTI)

We have studied the role of nonbonded interactions between mineral and collagen on collagen mechanics. We have also investigated molecular level ...

106

Creating bio-inspired hierarchical 3D-2D photonic stacks via planar lithography on self-assembled inverse opals  

E-Print Network (OSTI)

Structural hierarchy and complex 3D architecture are characteristics of biological photonic designs that are challenging to reproduce in synthetic materials. Top-down lithography allows for designer patterning of arbitrary shapes, but is largely restricted to planar 2D structures. Self-assembly techniques facilitate easy fabrication of 3D photonic crystals, but controllable defect-integration is difficult. In this paper we combine the advantages of top-down and bottom-up fabrication, developing two techniques to deposit 2D-lithographically-patterned planar layers on top of or in between inverse-opal 3D photonic crystals and creating hierarchical structures that resemble the architecture of the bright green wing scales of the butterfly, Parides sesostris. These fabrication procedures, combining advantages of both top-down and bottom-up fabrication, may prove useful in the development of omnidirectional coloration elements and 3D-2D photonic crystal devices.

Ian B. Burgess; Joanna Aizenberg; Marko Loncar

2012-11-29T23:59:59.000Z

107

The investigation of the structural properties of machines for the design of secure and trustworthy systems  

Science Conference Proceedings (OSTI)

In this paper, we investigate the problem of designing secure and trustworthy systems based on the notion of attack space. In particular, we consider the study of structural properties of a system at a design or architectural level. This preliminary ... Keywords: attack space, design for trustworthiness, secure systems, structure theory

Edward Jung; Chih-Cheng Hung; Guangzhi Ma; Seonho Choi

2011-11-01T23:59:59.000Z

108

The Design Procedure Language Manual  

E-Print Network (OSTI)

This manual describes the Design Procedure Language (DPL) for LSI design. DPL creates and maintains a representation of a design in a hierarchically organized, object-oriented LISP data-base. Designing in DPL involves ...

Batali, John

1980-09-01T23:59:59.000Z

109

Structural Design for the Development of the Floating Type ...  

Science Conference Proceedings (OSTI)

Finally, we designed and developed floating type photovoltaic generation system using the ... Polymer Electrolyte Membrane for Direct Methanol Fuel Cell.

110

The design and analysis of tension fabric structures  

E-Print Network (OSTI)

Although tensioned fabric structures are increasingly in demand, since they are comparatively new to the engineering world, there are relatively limited resources available about such structures. This report reviews the ...

Son, Miriam Euni

2007-01-01T23:59:59.000Z

111

Applying Object-Oriented Design to Structured Graphics  

E-Print Network (OSTI)

Structured graphics is useful for building applications that use a direct manipulation metaphor. Objectoriented languages offer inheritance, encapsulation, and runtime binding of operations to objects. Unfortunately, standard structured graphics packages do not use an object-oriented model, and object-oriented systems do not provide general-purpose structured graphics, relying instead on low-level graphics primitives. An object-oriented approach to structured graphics can give application programmers the benefits of both paradigms. We have

John M. Viissides; Mark A. Linton

1988-01-01T23:59:59.000Z

112

Design of structurally-sound masonry buildings using 3D static analysis  

E-Print Network (OSTI)

In the design of buildings, structural analysis is traditionally performed after the aesthetic design has been determined and has little in uence on the overall form. This thesis presents methods to integrate architectural ...

Whiting, Emily Jing Wei

2012-01-01T23:59:59.000Z

113

Design of a building structural skin using multi-objective optimization techniques  

E-Print Network (OSTI)

Multi-disciplinary System Design Optimization was used to design the geometry and to select the materials for the structural facade of a building. A multi-objective optimization model was developed, capable of optimizing ...

Merello, Riccardo

2006-01-01T23:59:59.000Z

114

Copula Based Hierarchical Bayesian Models  

E-Print Network (OSTI)

The main objective of our study is to employ copula methodology to develop Bayesian hierarchical models to study the dependencies exhibited by temporal, spatial and spatio-temporal processes. We develop hierarchical models for both discrete and continuous outcomes. In doing so we expect to address the dearth of copula based Bayesian hierarchical models to study hydro-meteorological events and other physical processes yielding discrete responses. First, we present Bayesian methods of analysis for longitudinal binary outcomes using Generalized Linear Mixed models (GLMM). We allow flexible marginal association among the repeated outcomes from different time-points. An unique property of this copula-based GLMM is that if the marginal link function is integrated over the distribution of the random effects, its form remains same as that of the conditional link function. This unique property enables us to retain the physical interpretation of the fixed effects under conditional and marginal model and yield proper posterior distribution. We illustrate the performance of the posited model using real life AIDS data and demonstrate its superiority over the traditional Gaussian random effects model. We develop a semiparametric extension of our GLMM and re-analyze the data from the AIDS study. Next, we propose a general class of models to handle non-Gaussian spatial data. The proposed model can deal with geostatistical data that can accommodate skewness, tail-heaviness, multimodality. We fix the distribution of the marginal processes and induce dependence via copulas. We illustrate the superior predictive performance of our approach in modeling precipitation data as compared to other kriging variants. Thereafter, we employ mixture kernels as the copula function to accommodate non-stationary data. We demonstrate the adequacy of this non-stationary model by analyzing permeability data. In both cases we perform extensive simulation studies to investigate the performances of the posited models under misspecification. Finally, we take up the important problem of modeling multivariate extreme values with copulas. We describe, in detail, how dependences can be induced in the block maxima approach and peak over threshold approach by an extreme value copula. We prove the ability of the posited model to handle both strong and weak extremal dependence and derive the conditions for posterior propriety. We analyze the extreme precipitation events in the continental United States for the past 98 years and come up with a suite of predictive maps.

Ghosh, Souparno

2009-08-01T23:59:59.000Z

115

Probability based load factors for design of concrete containment structures  

SciTech Connect

This paper describes a procedure for developing probability-based load combinations for the design of concrete containments. The proposed criteria are in a load and resistance factor design (LRFD) format. The load factors and resistance factors are derived for use in limit states design and are based on a target limit state probability. In this paper, the load factors for accident pressure and safe shutdown earthquake are derived for three target limit state probabilities. Other load factors are recommended on the basis of prior experience with probability-based design criteria for ordinary building construction. 6 refs.

Hwang, H.; Kagami, S.; Reich, M.; Ellingwood, B.; Shinozuka, M.

1985-01-01T23:59:59.000Z

116

Design and Dynamic Modeling of the Support Structure for a 10 MW Offshore Wind Turbine.  

E-Print Network (OSTI)

?? This thesis presents two designs of tension-leg-platforms (TLP) support structures for the 10 MW reference wind turbine being developed by the Norwegian Research Centre… (more)

Crozier, Aina

2011-01-01T23:59:59.000Z

117

Quantifying architects' and engineers' use of structural design software  

E-Print Network (OSTI)

Both architects and engineers encounter significant barriers and hurdles that compartmentalize both fields and increase the complexity of collaborative design. In addition to little interaction between both fields, software ...

Arnaud, Virginie B. (Virginie Blandine)

2013-01-01T23:59:59.000Z

118

Multiscale structural and mechanical design of mineralized biocomposites  

E-Print Network (OSTI)

Gastropod mollusk nacre tablets and Polypterus senegalus armored scales share common features such as a very complex and changing structure spanning several length scales. The smallest building blocks are single crystals, ...

Bruet, Benjamin J. F. (Benjamin Jean Fernand), 1980-

2008-01-01T23:59:59.000Z

119

Maintenance-based design of concrete parking structures  

E-Print Network (OSTI)

The purpose of this study is to determine what type of preventative maintenance for a concrete parking structure will produce the maximum economic benefit. Existing models for concrete deterioration are analyzed for their ...

Stoakes, Christopher D. (Christopher David)

2007-01-01T23:59:59.000Z

120

Procedure for developing biological input for the design, location, or modification of water-intake structures  

Science Conference Proceedings (OSTI)

To minimize adverse impact on aquatic ecosystems resulting from the operation of water intake structures, design engineers must have relevant information on the behavior, physiology and ecology of local fish and shellfish. Identification of stimulus/response relationships and the environmental factors that influence them is the first step in incorporating biological information in the design, location or modification of water intake structures. A procedure is presented in this document for providing biological input to engineers who are designing, locating or modifying a water intake structure. The authors discuss sources of stimuli at water intakes, historical approaches in assessing potential/actual impact and review biological information needed for intake design.

Neitzel, D.A.; McKenzie, D.H.

1981-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "hierarchical structure designed" 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

Hybrid hierarchical learning from dynamic scenes  

Science Conference Proceedings (OSTI)

The work proposes a hierarchical architecture for learning from dynamic scenes at various levels of knowledge abstraction. The raw visual information is processed at different stages to generate hybrid symbolic/sub-symbolic descriptions of the scene, ...

Prithwijit Guha; Pradeep Vaghela; Pabitra Mitra; K. S. Venkatesh; Amitabha Mukerjee

2005-12-01T23:59:59.000Z

122

Enhanced Mechanical Response of Hierarchical Mg Nano ...  

Science Conference Proceedings (OSTI)

Presentation Title, Enhanced Mechanical Response of Hierarchical Mg ... to the activity of non-basal slip systems and dynamic recovery at high temperature. ... of Nanostructured AZ91D Magnesium Alloy Under Oil-Lubricated Conditions.

123

Design and put in place institutional structures and processes | Open  

Open Energy Info (EERE)

and put in place institutional structures and processes and put in place institutional structures and processes Jump to: navigation, search Stage 1 LEDS Home Introduction to Framework Assess current country plans, policies, practices, and capacities Develop_BAU Stage 4: Prioritizing and Planning for Actions Begin execution of implementation plans 1.0. Organizing the LEDS Process 1.1. Institutional Structure for LEDS 1.2. Workplan to Develop the LEDS 1.3. Roles and responsibilities to develop LEDS 2.1. Assess current country plans, policies, practices, and capacities 2.2. Compile lessons learned and good practices from ongoing and previous sustainable development efforts in the country 2.3. Assess public and private sector capacity to support initiatives 2.4. Assess and improve the national GHG inventory and other

124

Shock-driven fluid-structure interaction for civil design  

SciTech Connect

The multiphysics fluid-structure interaction simulation of shock-loaded structures requires the dynamic coupling of a shock-capturing flow solver to a solid mechanics solver for large deformations. The Virtual Test Facility combines a Cartesian embedded boundary approach with dynamic mesh adaptation in a generic software framework of flow solvers using hydrodynamic finite volume upwind schemes that are coupled to various explicit finite element solid dynamics solvers (Deiterding et al., 2006). This paper gives a brief overview of the computational approach and presents first simulations that utilize the general purpose solid dynamics code DYNA3D for complex 3D structures of interest in civil engineering. Results from simulations of a reinforced column, highway bridge, multistory building, and nuclear reactor building are presented.

Wood, Stephen L [ORNL; Deiterding, Ralf [ORNL

2011-11-01T23:59:59.000Z

125

Development and Design of a Cooling Water Intake Structure Database  

Science Conference Proceedings (OSTI)

EPRI contracted Alden Laboratories, Inc. to develop an entrainment and impingement database (EIDB) in response to information needs that were identified from the U.S. Environmental Protection Agency's (EPA's) proposed revisions to Section 316(b) of the Clean Water Act (CWA). The original objective for the use of the EIDB was to determine if various environmental and plant operational factors influence entrainment and impingement of fish at cooling water intake structures (CWISs). It was subsequently dete...

2002-11-14T23:59:59.000Z

126

Structure and design of the electron lens for RHIC  

SciTech Connect

Two electron lenses for a head-on beam-beam compensation are being planned for RHIC; one for each circulating proton beam. The transverse profile of the electron beam will be Gaussian up to a maximum radius of r{sub e} = 3{sigma}. Simulations and design of the electron gun with Gaussian radial emission current density profile and of the electron collector are presented. Ions of the residual gas generated in the interaction region by electron and proton beams will be removed by an axial gradient of the electric field towards the electron collector. A method for the optical observation of the transverse profile of the electron beam is described.

Pikin, A.; Fischer, W.; Alessi, J.; Anerella, M.; Beebe, E. Gassner, D.; Gu, X.; Gupta, R.; Hock, J.; Jain, A.; Lambiase, R.; Luo, Y.; Montag, C.; Okamura, M.; Tan, Y.; Tuozzolo, J.; Thieberger, P.; Zhang, W.

2011-03-28T23:59:59.000Z

127

Design of Twin Structures in SiC Nanowires  

SciTech Connect

With covalent bonding, SiC has high mechanical strength and a large energy gap in electronic band structure. Nanoscale SiC, in the form of nanowires, has increased mechanical toughness and variable band gaps. Further, introduction of twin boundaries into cubic SiC nanowires can result in improvement in both mechanical and electronic properties. This review presents effects of twin boundaries on properties of cubic SiC nanowires, including mechanical and electronic properties. Further, this review presents recent developments in introducing twin boundaries into cubic SiC nanowires, controllably and uncontrollably.

Yongfeng Zhang; Hanchen Huang

2012-11-01T23:59:59.000Z

128

White Oak Creek embayment sediment retention structure design and construction  

SciTech Connect

White Oak Creek is the major surface water drainage throughout the Department of Energy (DOE) Oak Ridge National Laboratory (ORNL). Samples taken from the lower portion of the creek revealed high levels of Cesium 137 and lower level of Cobalt 60 in near surface sediment. Other contaminants present in the sediment included: lead, mercury, chromium, and PCBs. In October 1990, DOE, US Environmental Protection Agency (EPA), and Tennessee Department of Environment and Conservation (TDEC) agreed to initiate a time critical removal action in accordance with the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) to prevent the transport of the contaminated sediments into the Clinch River system. This paper discusses the environmental, regulatory, design, and construction issues that were encountered in conducting the remediation work.

Van Hoesen, S.D.; Kimmell, B.L. [Oak Ridge National Lab., TN (United States); Page, D.G.; Wilkerson, R.B. [MK-Ferguson of Oak Ridge Co., TN (United States); Hudson, G.R. [USDOE Oak Ridge Field Office, TN (United States); Kauschinger, J.L. [Ground Engineering Services, Alpharetta, GA (United States); Zocolla, M. [Nashville District, US Army Corps of Engineers, Nashville, TN (United States)

1994-12-31T23:59:59.000Z

129

Identifying Reference Objects by Hierarchical Clustering in Java Environment  

E-Print Network (OSTI)

Recently Java programming environment has become so popular. Java programming language is a language that is designed to be portable enough to be executed in wide range of computers ranging from cell phones to supercomputers. Computer programs written in Java are compiled into Java Byte code instructions that are suitable for execution by a Java Virtual Machine implementation. Java virtual Machine is commonly implemented in software by means of an interpreter for the Java Virtual Machine instruction set. As an object oriented language, Java utilizes the concept of objects. Our idea is to identify the candidate objects' references in a Java environment through hierarchical cluster analysis using reference stack and execution stack.

Saha, Rahul

2011-01-01T23:59:59.000Z

130

Impedance-based study of capacitive porous carbon electrodes with hierarchical and bimodal porosity  

E-Print Network (OSTI)

hierarchical and bimodal supercapacitor electrodes. First detailed characterization of hierarchical carbon Supercapacitor Capacitive deionization Electrochemical impedance spectroscopy Hierarchical carbon a b s t r a c

Santiago, Juan G.

131

Hierarchical Graphene Nanomaterials and Applications  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2011 TMS Annual Meeting & Exhibition. Symposium , 2011 Functional and Structural Nanomaterials: Fabrication, Properties, ...

132

Model-based design of an ultra high performance concrete support structure for a wind turbine  

E-Print Network (OSTI)

A support tower is the main structure which would support rotor, power transmission and control systems, and elevates the rotating blades above the earth boundary layer. A successful design should ensure safe, efficient ...

Wang, Zheng, M. Eng. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

133

A computational approach to the design of free form diagrid structure  

E-Print Network (OSTI)

In order to satisfy the ever-increasing complexity of modem architectural design of tall towers, diagrid structural systems are becoming more relevant. To deal with irregular geometries, more sophisticated computational ...

Sundberg, Jessica Nicole

2009-01-01T23:59:59.000Z

134

Case studies in DSM : utilizing the Design Structure Matrix to improve New Product Introduction  

E-Print Network (OSTI)

This thesis describes a project that applies the Design Structure Matrix (DSM) in support of the Manufacturing Excellence (MX) program at Cisco Systems, Inc to reduce the cycle time of new product development initiatives ...

Go, Julie W

2007-01-01T23:59:59.000Z

135

A multi-objective optimization approach with consideration of fuzzy variables applied to structural tire design  

Science Conference Proceedings (OSTI)

In this contribution, a structural design concept, suitable for the application to passenger car tire development process is proposed. The focus is set on one hand on providing an appropriate multi-objective optimization approach, enabling the consideration ... Keywords: Finite element simulation, Metamodels, Multi-objective optimization, Robustness, Tire design, Uncertainty

Aleksandra Serafinska; Michael Kaliske; Christoph Zopf; Wolfgang Graf

2013-01-01T23:59:59.000Z

136

Design guide for calculating fluid damping for circular cylindrical structures. [LMFBR  

Science Conference Proceedings (OSTI)

Fluid damping plays an important role for structures submerged in fluid, subjected to flow, or conveying fluid. This design guide presents a summary of calculational procedures and design data for fluid damping for circular cylinders vibrating in quiescent fluid, crossflow, and parallel flow.

Chen, S.S.

1983-06-01T23:59:59.000Z

137

Structural Design of a Horizontal-Axis Tidal Current Turbine Composite Blade  

DOE Green Energy (OSTI)

This paper describes the structural design of a tidal composite blade. The structural design is preceded by two steps: hydrodynamic design and determination of extreme loads. The hydrodynamic design provides the chord and twist distributions along the blade length that result in optimal performance of the tidal turbine over its lifetime. The extreme loads, i.e. the extreme flap and edgewise loads that the blade would likely encounter over its lifetime, are associated with extreme tidal flow conditions and are obtained using a computational fluid dynamics (CFD) software. Given the blade external shape and the extreme loads, we use a laminate-theory-based structural design to determine the optimal layout of composite laminas such that the ultimate-strength and buckling-resistance criteria are satisfied at all points in the blade. The structural design approach allows for arbitrary specification of the chord, twist, and airfoil geometry along the blade and an arbitrary number of shear webs. In addition, certain fabrication criteria are imposed, for example, each composite laminate must be an integral multiple of its constituent ply thickness. In the present effort, the structural design uses only static extreme loads; dynamic-loads-based fatigue design will be addressed in the future. Following the blade design, we compute the distributed structural properties, i.e. flap stiffness, edgewise stiffness, torsion stiffness, mass, moments of inertia, elastic-axis offset, and center-of-mass offset along the blade. Such properties are required by hydro-elastic codes to model the tidal current turbine and to perform modal, stability, loads, and response analyses.

Bir, G. S.; Lawson, M. J.; Li, Y.

2011-10-01T23:59:59.000Z

138

Applying least squares support vector machines to the airframe wing-box structural design cost estimation  

Science Conference Proceedings (OSTI)

This research used the least squares support vector machines (LS-SVM) method to estimate the project design cost of an airframe wing-box structure. We also compared the estimation performance using back-propagation neural networks (BPN) and statistical ... Keywords: Airframe structure, Back-propagation neural networks, Cost estimation, Least squares support vector machines, Response surface methodology

S. Deng; Tsung-Han Yeh

2010-12-01T23:59:59.000Z

139

Design of a carbon fiber composite grid structure for the GLAST spacecraft using a novel manufacturing technique  

E-Print Network (OSTI)

Design of a carbon fiber composite grid structure for the GLAST spacecraft using a novel manufacturing technique

Hicks, Michael Thomas

2001-01-01T23:59:59.000Z

140

Hierarchical resilience with lightweight threads.  

Science Conference Proceedings (OSTI)

This paper proposes methodology for providing robustness and resilience for a highly threaded distributed- and shared-memory environment based on well-defined inputs and outputs to lightweight tasks. These inputs and outputs form a failure 'barrier', allowing tasks to be restarted or duplicated as necessary. These barriers must be expanded based on task behavior, such as communication between tasks, but do not prohibit any given behavior. One of the trends in high-performance computing codes seems to be a trend toward self-contained functions that mimic functional programming. Software designers are trending toward a model of software design where their core functions are specified in side-effect free or low-side-effect ways, wherein the inputs and outputs of the functions are well-defined. This provides the ability to copy the inputs to wherever they need to be - whether that's the other side of the PCI bus or the other side of the network - do work on that input using local memory, and then copy the outputs back (as needed). This design pattern is popular among new distributed threading environment designs. Such designs include the Barcelona STARS system, distributed OpenMP systems, the Habanero-C and Habanero-Java systems from Vivek Sarkar at Rice University, the HPX/ParalleX model from LSU, as well as our own Scalable Parallel Runtime effort (SPR) and the Trilinos stateless kernels. This design pattern is also shared by CUDA and several OpenMP extensions for GPU-type accelerators (e.g. the PGI OpenMP extensions).

Wheeler, Kyle Bruce

2011-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "hierarchical structure designed" 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 Hierarchical and Contextual Model for Aerial Image Parsing  

Science Conference Proceedings (OSTI)

In this paper we present a hierarchical and contextual model for aerial image understanding. Our model organizes objects (cars, roofs, roads, trees, parking lots) in aerial scenes into hierarchical groups whose appearances and configurations are determined ... Keywords: Aerial images, Bayesian inference, Hierarchical models, Image understanding, Scene-level context, Statistical learning, Swendsen-Wang clustering

Jake Porway; Qiongchen Wang; Song Chun Zhu

2010-06-01T23:59:59.000Z

142

Hierarchical Control Scheme for Voltage Unbalance Compensation in Islanded Microgrids  

E-Print Network (OSTI)

Hierarchical Control Scheme for Voltage Unbalance Compensation in Islanded Microgrids Mehdi@et.aau.dk Abstract-- The concept of microgrid hierarchical control is presented, recently. In this paper, a hierarchical scheme which includes primary and secondary control levels is proposed for islanded microgrids

Vasquez, Juan Carlos

143

Efficient forecasting for hierarchical time series  

Science Conference Proceedings (OSTI)

Forecasting is used as the basis for business planning in many application areas such as energy, sales and traffic management. Time series data used in these areas is often hierarchically organized and thus, aggregated along the hierarchy levels based ... Keywords: forecasting, hierarchies, optimization, time series

Lars Dannecker; Robert Lorenz; Philipp Rösch; Wolfgang Lehner; Gregor Hackenbroich

2013-10-01T23:59:59.000Z

144

A hierarchical model for BGP routing policies  

Science Conference Proceedings (OSTI)

BGP routing policies are mainly used by network operators to enforce business relationships between Autonomous Systems (AS), and to prefer some routes over others. In this paper, we propose a hierarchical policy model to express each policy at the most ... Keywords: bgp, network configuration, routing policies

Laurent Vanbever; Bruno Quoitin; Olivier Bonaventure

2009-08-01T23:59:59.000Z

145

Hierarchical, perceptron-like learning for ontology-based information extraction  

Science Conference Proceedings (OSTI)

Recent work on ontology-based Information Extraction (IE) has tried to make use of knowledge from the target ontology in order to improve semantic annotation results. However, very few approaches exploit the ontology structure itself, and those that ... Keywords: hierarchical learning, ontology-based information extraction, semantic annotation

Yaoyong Li; Kalina Bontcheva

2007-05-01T23:59:59.000Z

146

Peptide inhibitors of botulinum neurotoxin serotype A: design, inhibition, cocrystal structures, structure-activity relationship and pharmacophore modeling  

SciTech Connect

Clostridium botulinum neurotoxins are classified as Category A bioterrorism agents by the Centers for Disease Control and Prevention (CDC). The seven serotypes (A-G) of the botulinum neurotoxin, the causative agent of the disease botulism, block neurotransmitter release by specifically cleaving one of the three SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) proteins and induce flaccid paralysis. Using a structure-based drug-design approach, a number of peptide inhibitors were designed and their inhibitory activity against botulinum serotype A (BoNT/A) protease was determined. The most potent peptide, RRGF, inhibited BoNT/A protease with an IC{sub 50} of 0.9 {micro}M and a K{sub i} of 358 nM. High-resolution crystal structures of various peptide inhibitors in complex with the BoNT/A protease domain were also determined. Based on the inhibitory activities and the atomic interactions deduced from the cocrystal structures, the structure-activity relationship was analyzed and a pharmacophore model was developed. Unlike the currently available models, this pharmacophore model is based on a number of enzyme-inhibitor peptide cocrystal structures and improved the existing models significantly, incorporating new features.

Kumar G.; Swaminathan S.; Kumaran, D.; Ahmed, S. A.

2012-05-01T23:59:59.000Z

147

Preliminary structural design conceptualization for composite rotor for verdant power water current turbine  

DOE Green Energy (OSTI)

Sandia National Laboratories (SNL) and Verdant Power Inc. (VPI) have partnered under a Cooperative Research and Development Agreement (CRADA) to develop a new kinetic hydropower rotor. The rotor features an improved hydrodynamic and structural design which features state-of-the-art technology developed for the wind industry. The new rotor will have higher energy capture, increased system reliability, and reduction of overall cost of energy. This project was divided into six tasks: (1) Composite Rotor Project Planning and Design Specification; (2) Baseline Fatigue Testing and Failure analysis; (3) Develop Blade/Rotor Performance Model; (4) Hydrofoil Survey and Selection; (5) FEM Structural Design; and (6) Develop Candidate Rotor Designs and Prepare Final Report.

Paquette, J. A.

2012-03-01T23:59:59.000Z

148

A Hierarchical History Matching Method and its Applications  

E-Print Network (OSTI)

Modern reservoir management typically involves simulations of geological models to predict future recovery estimates, providing the economic assessment of different field development strategies. Integrating reservoir data is a vital step in developing reliable reservoir performance models. Currently, most effective strategies for traditional manual history matching commonly follow a structured approach with a sequence of adjustments from global to regional parameters, followed by local changes in model properties. In contrast, many of the recent automatic history matching methods utilize parameter sensitivities or gradients to directly update the fine-scale reservoir properties, often ignoring geological inconsistency. Therefore, there is need for combining elements of all of these scales in a seamless manner. We present a hierarchical streamline-assisted history matching, with a framework of global-local updates. A probabilistic approach, consisting of design of experiments, response surface methodology and the genetic algorithm, is used to understand the uncertainty in the large-scale static and dynamic parameters. This global update step is followed by a streamline-based model calibration for high resolution reservoir heterogeneity. This local update step assimilates dynamic production data. We apply the genetic global calibration to unconventional shale gas reservoir specifically we include stimulated reservoir volume as a constraint term in the data integration to improve history matching and reduce prediction uncertainty. We introduce a novel approach for efficiently computing well drainage volumes for shale gas wells with multistage fractures and fracture clusters, and we will filter stochastic shale gas reservoir models by comparing the computed drainage volume with the measured SRV within specified confidence limits. Finally, we demonstrate the value of integrating downhole temperature measurements as coarse-scale constraint during streamline-based history matching of dynamic production data. We first derive coarse-scale permeability trends in the reservoir from temperature data. The coarse information are then downscaled into fine scale permeability by sequential Gaussian simulation with block kriging, and updated by local-scale streamline-based history matching. he power and utility of our approaches have been demonstrated using both synthetic and field examples.

Yin, Jichao

2011-12-01T23:59:59.000Z

149

Structural performance of the first SSC (Superconducting Super Collider) Design B dipole magnet  

Science Conference Proceedings (OSTI)

The first Design B Superconducting Super Collider (SSC) dipole magnet has been successfully tested. This magnet was heavily instrumented with temperature and strain gage sensors in order to evaluate its adherence to design constraints and design calculations. The instrumentation and associated data acquisition system allowed monitoring of the magnet during cooldown, warmup, and quench testing. This paper will focus on the results obtained from structural measurements on the suspension system during normal and rapid cooldowns and during quench studies at full magnet current. 4 refs., 9 figs.

Nicol, T.H.

1989-09-01T23:59:59.000Z

150

Structural characterization and design optimization of hybrid composite tubes for TLP riser applications  

E-Print Network (OSTI)

Composite materials offer a unique opportunity for offshore applications where high stiffness and light weight are the major design criteria. Deep water drilling and production risers are one area where detailed design studies of potential composite applications are required. This thesis outlines the essential considerations for the analysis and design of structurally and economically efficient layups that may be considered for multiaxial load bearing structures. The work focuses on analytical and experimental characterization of prototype tubes and the development and implementation of an optimization technique to study the design of prototype and full scale components. A progressive failure criteria in the finite element procedure is utilized to accurately capture detailed failure behavior of composite tubes and correlate analytical results with experimental data. Once confidence in the analytical approach is gained and design requirements are established, the developed design optimization methodology is applied to the optimization of a potential riser tube for a tension leg platform (TLP). Further analyses are then used to select a final optimized design and confirm its capabilities.

Farivar-Sadri, Kamran

1995-01-01T23:59:59.000Z

151

A Hierarchical Control Architecture for a PEBB-Based ILC Marx Modulator  

SciTech Connect

The idea of building power conversion systems around Power Electronic Building Blocks (PEBBs) was initiated by the U.S. Office of Naval Research in the mid 1990s. A PEBB-based design approach is advantageous in terms of power density, modularity, reliability, and serviceability. It is obvious that this approach has much appeal for pulsed power conversion including the International Linear Collider (ILC) klystron modulator application. A hierarchical control architecture has the inherent capability to support the integration of PEBBs. This has already been successfully demonstrated in a number of industrial applications in the recent past. This paper outlines the underlying concepts of a hierarchical control architecture for a PEBB-based Marx-topology ILC klystron modulator. The control in PEBB-based power conversion systems can be functionally partitioned into (three) hierarchical layers; system layer, application layer, and PEBB layer. This has been adopted here. Based on such a hierarchical partition, the interfaces are clearly identified and defined and, consequently, are easily characterised. A conceptual design of the hardware manager, executing low-level hardware oriented tasks, is detailed. In addition, the idea of prognostics is briefly discussed.

Macken, K.; Burkhart, C.; Larsen, R.; Nguyen, M.N.; Olsen, J.; /SLAC

2011-12-15T23:59:59.000Z

152

Magnet Design of a Prototype Structure for the X-ray FELs at TESLA  

E-Print Network (OSTI)

Magnet Design of a Prototype Structure for the X-ray FELs at TESLA M. Tischer, J. Pflüger Hamburger Synchrotronstrahlungslabor HASYLAB, DESY, Notkestr. 85, D-22603 Hamburg, Germany Abstract XFEL undulators for the TESLA device is suggested so that both field integrals are trimmed close to zero for all gaps. TESLA­FEL 2000

153

Product decomposition using design structure matrix for intellectual property protection in supply chain outsourcing  

Science Conference Proceedings (OSTI)

In global recession, outsourcing becomes a question of survival for most executives who need to restore profitability and growth. One of the critical challenges faced by such decisions is the potential risk of leaking confidential information through ... Keywords: Decision making, Design structure matrix, Intellectual property protection, Risk management, Supplier selection

Xiaoguang Deng; Greg Huet; Suo Tan; CléMent Fortin

2012-08-01T23:59:59.000Z

154

Structural design considerations for stretched-membrane heliostat reflector modules with stability and initial imperfection considerations  

Science Conference Proceedings (OSTI)

This report extends the work of several previous reports that present the background leading to the development of stretched-membrane modules and analysis methods to study the structural response of the stretched-membrane module. Specifically, this report presents and discusses the design implications based on our analysis of single- or double-membrane concepts, and the amplification of initial imperfections and deflections caused by loading, which results from stability considerations. In this document, we present analysis results for both single- and double-membrane concepts corresponding to a range of design and loading conditions. Further, we show that stretched-membrane/frame combinations respond quite differently to external loads than can be inferred by studying the decoupled frame and membrane independently. Thus the coupled membrane/frame problem should be considered to assure an accurate description of its response. For idealized configurations and loadings, we discuss the relative merits of various design features for both of these designs. In addition, we studied the structural stability (i.e., the tendency of structural deformation to grow with little increase in applied load) of the tensioned-membrane, compressed-frame combination. Moreover, we demonstrate how stability considerations are important in determining the amplification of both initial displacement imperfection and the deformations caused by wind and weight loading on the structure.

Murphy, L.M.; Simms, D.; Sallis, D.V.

1986-10-01T23:59:59.000Z

155

Control structure design for stabilizing unstable gas-lift oil wells  

E-Print Network (OSTI)

Control structure design for stabilizing unstable gas-lift oil wells Esmaeil Jahanshahi, Sigurd valve is the recommended solution to prevent casing-heading instability in gas-lifted oil wells. Focus to be effective to stabilize this system. Keywords: Oil production, two-phase flow, gas-lift, controllability, H

Skogestad, Sigurd

156

An efficient simulated annealing algorithm for design optimization of truss structures  

Science Conference Proceedings (OSTI)

This paper presents an optimization algorithm based on Simulated Annealing. The algorithm - denoted as CMLPSA (Corrected Multi-Level &Multi-Point Simulated Annealing) - implements an advanced search mechanism where each candidate design is selected from ... Keywords: Harmony search, Multi-level search, Multi-point search, Particle swarm, Simulated annealing optimization, Truss structures

L. Lamberti

2008-10-01T23:59:59.000Z

157

A Kind of Innovative Design Methodology of Wind Turbine Blade Based on Natural Structure  

Science Conference Proceedings (OSTI)

Based on the mid axis pattern configuration, the topology adaption of the plant leaf vein is discussed in the first place., Secondly, combined with the blade principal stress field distribution cases, the adaptive design is applied in the blade structure ... Keywords: adaptation, blade, hybrid composites, mid axis pattern, stress field

Wangyu Liu; Jiaxing Gong; Xifeng Liu; Xin Zhang

2009-05-01T23:59:59.000Z

158

MS/NMR: A Structure-Based Approach for Discovering Protein Ligands and for Drug Design  

E-Print Network (OSTI)

MS/NMR: A Structure-Based Approach for Discovering Protein Ligands and for Drug Design by Coupling of size exclusion gel chromatography, mass spectrometry, and NMR to identify bound complexes are then individually assayed by chemical shift perturbations in a 2D 1H-15N HSQC NMR spectrum to verify specific

Powers, Robert

159

Deferring design pattern decisions and automating structural pattern changes using a design-pattern-based programming system  

Science Conference Proceedings (OSTI)

In the design phase of software development, the designer must make many fundamental design decisions concerning the architecture of the system. Incorrect decisions are relatively easy and inexpensive to fix if caught during the design process, but the ... Keywords: Design patterns, design decisions, object-oriented frameworks, parallel programming, software maintenance

Steve MacDonald; Kai Tan; Jonathan Schaeffer; Duane Szafron

2009-04-01T23:59:59.000Z

160

Design of the support structure, drive pedestal, and controls for a solar concentrator  

SciTech Connect

The glass/metal McDonnell-Douglas dish is the state-of-the-art of parabolic dish concentrators. Because of the perceived high production cost of this concentrator, the Department of Energy's Solar Thermal Program is developing stretch-membrane technology for large (75 kWt) solar concentrators for integration with receivers and engines in 25 kWe dish-Stirling systems. The objective of this development effort is to reduce the cost of the concentrator while maintaining the high levels of performance characteristic of glass-metal dishes. Under contract to Sandia National Laboratories, Science Applications International Corporation, Solar Kinetics Inc. and WG Associates are developing a faceted stretched-membrane heliostat technology. This design will result in a low-risk, near-term concentrator for dish-Stirling systems. WG Associates has designed the support structure, drives and tracking controls for this dish. The structure is configured to support 12 stretched-membrane, 3.5-meter diameter facets in a shaped dish configuration. The dish design is sized to power a dish-Stirling system capable of producing 25 kW (electric). In the design of the structure, trade-off studies were conducted to determine the best'' facet arrangement, dish contour, dish focal length, tracking control and walk-off protection. As part of the design, in-depth analyses were performed to evaluate pointing accuracy, compliance with AISC steel design codes, and the economics of fabrication and installation. Detailed fabrication and installation drawings were produced, and initial production cost estimates for the dish were developed. These issues, and the final dish design, are presented in this report. 7 refs., 33 figs., 18 tabs.

Goldberg, V.R.; Ford, J.L.; Anderson, A.E. (WG Associates, Dallas, TX (United States))

1991-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "hierarchical structure designed" 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

Design of the support structure, drive pedestal, and controls for a solar concentrator  

DOE Green Energy (OSTI)

The glass/metal McDonnell-Douglas dish is the state-of-the-art of parabolic dish concentrators. Because of the perceived high production cost of this concentrator, the Department of Energy's Solar Thermal Program is developing stretch-membrane technology for large (75 kWt) solar concentrators for integration with receivers and engines in 25 kWe dish-Stirling systems. The objective of this development effort is to reduce the cost of the concentrator while maintaining the high levels of performance characteristic of glass-metal dishes. Under contract to Sandia National Laboratories, Science Applications International Corporation, Solar Kinetics Inc. and WG Associates are developing a faceted stretched-membrane heliostat technology. This design will result in a low-risk, near-term concentrator for dish-Stirling systems. WG Associates has designed the support structure, drives and tracking controls for this dish. The structure is configured to support 12 stretched-membrane, 3.5-meter diameter facets in a shaped dish configuration. The dish design is sized to power a dish-Stirling system capable of producing 25 kW (electric). In the design of the structure, trade-off studies were conducted to determine the best'' facet arrangement, dish contour, dish focal length, tracking control and walk-off protection. As part of the design, in-depth analyses were performed to evaluate pointing accuracy, compliance with AISC steel design codes, and the economics of fabrication and installation. Detailed fabrication and installation drawings were produced, and initial production cost estimates for the dish were developed. These issues, and the final dish design, are presented in this report. 7 refs., 33 figs., 18 tabs.

Goldberg, V.R.; Ford, J.L.; Anderson, A.E. (WG Associates, Dallas, TX (United States))

1991-08-01T23:59:59.000Z

162

HIERARCHICAL METHODOLOGY FOR MODELING HYDROGEN STORAGE SYSTEMS. PART I: SCOPING MODELS  

DOE Green Energy (OSTI)

Detailed models for hydrogen storage systems provide essential design information about flow and temperature distributions, as well as, the utilization of a hydrogen storage media. However, before constructing a detailed model it is necessary to know the geometry and length scales of the system, along with its heat transfer requirements, which depend on the limiting reaction kinetics. More fundamentally, before committing significant time and resources to the development of a detailed model, it is necessary to know whether a conceptual storage system design is viable. For this reason, a hierarchical system of models progressing from scoping models to detailed analyses was developed. This paper, which discusses the scoping models, is the first in a two part series that presents a collection of hierarchical models for the design and evaluation of hydrogen storage systems.

Hardy, B; Donald L. Anton, D

2008-12-22T23:59:59.000Z

163

Survey for Safety Software Used in Design of Structures, Systems, and Components  

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

Design Software Survey September 2003 1 Design Software Survey September 2003 1 Survey of Safety Software Used in Design of Structures, Systems, and Components 1. Introduction The Department's Implementation Plan for Software Quality Assurance (SQA) that was developed in response to Defense Nuclear Facilities Safety Board Recommendation 2002-01, Quality Assurance for Safety-Related Software, includes a commitment (4.2.1.5) to conduct a survey of design codes currently in use to determine if any should be included as part of the toolbox codes. The toolbox codes are a small number of standard computer models (codes) supporting DOE safety analysis that have widespread use and appropriate qualification. Generally, the toolbox codes will have been developed and maintained within the DOE complex. However, the toolbox may also include

164

Enhancing Composition Window of Bicontinuous Structures by Designed Polydispersity Distribution of ABA Triblock Copolymers  

E-Print Network (OSTI)

The phase behavior of polydisperse ABA triblock copolymers is studied using dissipative particle dynamics simulations, focusing on the emergence and property of bicontinuous structures. Bicontinuous structures are characterized by two separate, intermeshed nanoscopic domains extending throughout the material. The connectivity of polymeric bicontinuous structures makes them highly desirable for many applications. For conventional monodisperse diblock and triblock copolymers, regular bicontinuous structures (i.e., gyroid and Fddd) can be formed over a narrow composition window of ~3%. We demonstrate that the composition window for the formation of bicontinuous structures can be regulated by designed polydispersity distributions of ABA triblock copolymers. In particular, introducing polydispersity in both A and B blocks can lead to a significant enhancement of the composition window of bicontinuous structures with both continuous A and B domains. The mechanism of the bicontinuous structure enhancement is elucidated from the distribution of the long and short blocks. Furthermore, it is shown that the polymeric bicontinuous structures from polydisperse ABA triblock copolymers possess good continuity throughout the sample, making them ideal candidates for advanced applications.

Yue Li; Hu-Jun Qian; Zhong-Yuan Lu; An-Chang Shi

2013-10-22T23:59:59.000Z

165

Ice-templated Porous Ceramic Structures for Energy Applications  

Science Conference Proceedings (OSTI)

We have studied the ice-templating method for filters and battery electrode applications with the hierarchical pore structure. The porous Si structure was ...

166

Structure-property correlations in the design of organic metals and superconductors: An overview  

SciTech Connect

Molecular structure and, more importantly, molecular packing in organic superconducting salts (TMTSF){sub 2}X, {beta}-(BEDT-TTF){sub 2}X and {kappa}-(BEDT-TTF){sub 2}X will be examined in the context of deducing structure-property correlations in these systems. Such an approach has been instrumental in the discovery of superconductivity at 10.4 K in {kappa}-(BEDT-TTF){sub 2}Cu(NCS){sub 2}, and it will continue to serve as an important tool in the rational design of new organic superconductors with even higher superconducting transition temperatures.

Kini, A.M.; Beno, M.A.; Carlson, K.D.; Ferraro, J.R.; Geiser, U.; Schultz, A.J.; Wang, H.H.; Williams, J.M.

1989-01-01T23:59:59.000Z

167

The design and manufacture of a novel thin-film microelectronic vacuum diode structure  

E-Print Network (OSTI)

The need for a new microelectronics technology that answers some of the limitations of current semiconductor based technology can no longer be ignored. To this end, vacuum microelectronics based on cold field emission has been explored as an alternative to the silicon transistor. To date, these approaches have been plagued with design-related problems that have retarded their acceptance as a viable technology. This work proposes a new vacuum diode structure, novel in its design. It can be easily expanded to multi-electrode structures, and has application in flat-panel display technology. A process for the manufacture of such a diode is developed herein. Diodes of various sizes are subsequently manufactured and tested. Test results indicate that the devices follow the Fowler-Nordheim model for cold field emission, suggesting successful operation. Suggestions for future work in this area axe discussed, including triode development and application to flat panel displays.

Mason, Mark E.

1993-01-01T23:59:59.000Z

168

IRIM@TRECVID2012 Hierarchical Late Fusion for Concept ...  

Science Conference Proceedings (OSTI)

Page 1. IRIM@TRECVID2012 Hierarchical Late Fusion for Concept Detection in Videos ... slide 4 /21 Processing chain : late fusion context Video ...

2012-12-10T23:59:59.000Z

169

Bayesian Analysis in Applications of Hierarchical Models: Issues and Methods  

E-Print Network (OSTI)

A. S. Smith (Eds. ), Bayesian statistics 4 (pp. 336-338).Smith, A. F. (1993). Bayesian inference for generalizedat UCLA on May 23, 2011 Bayesian Analysis for Hierarchical

Michael Seltzer; Wing H. Wong; Anthony S. Bryk

2011-01-01T23:59:59.000Z

170

Structuring ship design project approval mechanism towards installation of operator-system interfaces via fuzzy axiomatic design principles  

Science Conference Proceedings (OSTI)

Managing the verification of primary design projects for ship machinery systems is one of the crucial stages in ship building processes. In particular, the design of operator-system interfaces such as remote controls, displays, alarms, workstations, ... Keywords: Axiomatic design, Fuzzy logic, Information axiom, Multiple criteria decision-making, Ship machinery installation, User-oriented design

Selcuk Cebi; Metin Celik; Cengiz Kahraman

2010-03-01T23:59:59.000Z

171

Hierarchical extraction of critical area for shorts in very large ICs  

Science Conference Proceedings (OSTI)

This paper describes an algorithm for efficiently extracting critical area in large VLSI circuits. The algorithm, implemented to handle shorts between electrical nets, takes advantage of the available hierarchy in the layout description in order to speed-up ... Keywords: CREST software, IC design, VLSI, circuit layout CAD, critical area extraction, hierarchical extraction, integrated circuit layout, large VLSI circuits, layout description, shorts, very large ICs

P. K. Nag; W. Maly

1995-11-01T23:59:59.000Z

172

Hierarchical electrode architectures for electrical energy storage & conversion.  

DOE Green Energy (OSTI)

The integration and stability of electrocatalytic nanostructures, which represent one level of porosity in a hierarchical structural scheme when combined with a three-dimensional support scaffold, has been studied using a combination of synthetic processes, characterization techniques, and computational methods. Dendritic platinum nanostructures have been covalently linked to common electrode surfaces using a newly developed chemical route; a chemical route equally applicable to a range of metals, oxides, and semiconductive materials. Characterization of the resulting bound nanostructure system confirms successful binding, while electrochemistry and microscopy demonstrate the viability of these electroactive particles. Scanning tunneling microscopy has been used to image and validate the short-term stability of several electrode-bound platinum dendritic sheet structures toward Oswald ripening. Kinetic Monte Carlo methods have been applied to develop an understanding of the stability of the basic nano-scale porous platinum sheets as they transform from an initial dendrite to hole containing sheets. Alternate synthetic strategies were pursued to grow dendritic platinum structures directly onto subunits (graphitic particles) of the electrode scaffold. A two-step photocatalytic seeding process proved successful at generating desirable nano-scale porous structures. Growth in-place is an alternate strategy to the covalent linking of the electrocatalytic nanostructures.

Zavadil, Kevin Robert; Missert, Nancy A.; Shelnutt, John Allen; van Swol, Frank B.

2012-01-01T23:59:59.000Z

173

Monolithic or hierarchical star formation? A new statistical analysis  

E-Print Network (OSTI)

We consider an analytic model of cosmic star formation which incorporates supernova feedback, gas accretion and enriched outflows, reproducing the history of cosmic star formation, metallicity, supernovae type II rates and the fraction of baryons allocated to structures. We present a new statistical treatment of the available observational data on the star formation rate and metallicity that accounts for the presence of possible systematics. We then employ a Bayesian Markov Chain Monte Carlo method to compare the predictions of our model with observations and derive constraints on the 7 free parameters of the model. We find that the dust correction scheme one chooses to adopt for the star formation data is critical in determining which scenario is favoured between a hierarchical star formation model, where star formation is prolonged by accretion, infall and merging, and a monolithic scenario, where star formation is rapid and efficient. We distinguish between these modes by defining a characteristic minimum mass, M > 10^{11} M_solar, in our fiducial model, for early type galaxies where star formation occurs efficiently. Our results indicate that the hierarchical star formation model can achieve better agreement with the data, but that this requires a high efficiency of supernova-driven outflows. In a monolithic model, our analysis points to the need for a mechanism that drives metal-poor winds, perhaps in the form of supermassive black hole-induced outflows. Furthermore, the relative absence of star formation beyond z ~ 5 in the monolithic scenario requires an alternative mechanism to dwarf galaxies for reionizing the universe at z ~ 11, as required by observations of the microwave background. While the monolithic scenario is less favoured in terms of its quality-of-fit, it cannot yet be excluded.

Marios Kampakoglou; Roberto Trotta; Joe Silk

2007-09-07T23:59:59.000Z

174

Exploiting hierarchical parallelisms for molecular dynamics simulation on multicore clusters  

Science Conference Proceedings (OSTI)

We have developed a scalable hierarchical parallelization scheme for molecular dynamics (MD) simulation on multicore clusters. The scheme explores multilevel parallelism combining: (1) Internode parallelism using spatial decomposition via message passing; ... Keywords: Molecular dynamics simulation, Multicore cluster, Scalable hierarchical parallelization scheme, Single instruction multiple data

Liu Peng; Manaschai Kunaseth; Hikmet Dursun; Ken-Ichi Nomura; Weiqiang Wang; Rajiv K. Kalia; Aiichiro Nakano; Priya Vashishta

2011-07-01T23:59:59.000Z

175

Improving hierarchical document signature performance by classifier combination  

Science Conference Proceedings (OSTI)

We present a classifier-combination experimental framework for part-of-speech (POS) tagging in which four different POS taggers are combined in order to get a better result for sentence similarity using Hierarchical Document Signature (HDS). It is important ... Keywords: different tagging methods, hierarchical document signature, part-of-speech taggers

Jieyi Liao; B. Sumudu U. Mendis; Sukanya Manna

2010-11-01T23:59:59.000Z

176

Distributed Energy-Efficient Hierarchical Clustering for Wireless Sensor Networks  

E-Print Network (OSTI)

Distributed Energy-Efficient Hierarchical Clustering for Wireless Sensor Networks Ping Ding, Jo important. In this paper, we propose a distributed weight-based energy-efficient hierarchical clustering of the network topology. Younis and Fahmy [4] propose a Hybrid Energy-Efficient Distributed clustering (HEED

Holliday, JoAnne

177

Hierarchical clustering using correlation metric and spatial continuity constraint  

DOE Patents (OSTI)

Large data sets are analyzed by hierarchical clustering using correlation as a similarity measure. This provides results that are superior to those obtained using a Euclidean distance similarity measure. A spatial continuity constraint may be applied in hierarchical clustering analysis of images.

Stork, Christopher L.; Brewer, Luke N.

2012-10-02T23:59:59.000Z

178

Fuzzy hierarchical production planning (with a case study)  

Science Conference Proceedings (OSTI)

Hierarchical production planning (HPP) is a well-known approach to cope with the complexity of multi-level production planning and scheduling problems in real-world industrial cases. However, negligence of some issues such as inherent uncertainty in ... Keywords: Fuzzy mathematical programming, Hierarchical production planning, Make-To-Stock systems

S. A. Torabi; M. Ebadian; R. Tanha

2010-06-01T23:59:59.000Z

179

Partition selection approach for hierarchical clustering based on clustering ensemble  

Science Conference Proceedings (OSTI)

Hierarchical clustering algorithms are widely used in many fields of investigation. They provide a hierarchy of partitions of the same dataset. However, in many practical problems, the selection of a representative level (partition) in the hierarchy ... Keywords: cluster validity index, clustering ensemble, hierarchical clustering, partition selection

Sandro Vega-Pons; José Ruiz-Shulcloper

2010-11-01T23:59:59.000Z

180

A hierarchical multicast protocol in mobile IPv6 networks  

Science Conference Proceedings (OSTI)

In this paper, we propose a hierarchical multicast protocol in Mobile IPv6 networks (HMoM), which utilizes the advantages of hierarchical mobility management in handling unicast routing. The multicast agent is selected dynamically and can be located ... Keywords: Mobile IP, Mobile multicast, Protocol, Routing

Ping Wang; Yunze Cai; Jinjie Huang; Xiaoming Xu

2006-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "hierarchical structure designed" 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

A Hierarchical Concept-matrix Patterned Multi-Agent Based Automated Text Classification Method for Digital Libraries  

Science Conference Proceedings (OSTI)

In this work a new hierarchical concept-matrix patterned multi-agent based automated classification method is designed and developed in a distributed server environment. Phrase oriented approach is used instead of word based approach. Latent Semantic ... Keywords: Concept-Matrix, Latent Semantic Analysis, Multi-Agent System

R. Ponnusamy; T. V. Gopal; S. Vaidyanathan

2006-05-01T23:59:59.000Z

182

Pipelined Match-Lines and Hierarchical Search-Lines for Low-Power Content-Addressable Memories  

E-Print Network (OSTI)

This paper presents a pipelined match-line and a hierarchical search-line architecture to reduce power in content-addressable memories (CAM). The overall power reduction is 60%, with 29% contributed by the pipelined match-lines and 31% contributed by the hierarchical search-lines. This proposed architecture is employed in the design of a 1024x144 bit ternary CAM, achieving 7 ns search cycle time at 2.89 fJ/bit/search in a 0.18 um CMOS process.

Kostas Pagiamtzis; Ali Sheikholeslami

2003-01-01T23:59:59.000Z

183

Abstract--The concept of microgrid hierarchical control is presented recently. In this paper, a hierarchical scheme is  

E-Print Network (OSTI)

1 1 Abstract-- The concept of microgrid hierarchical control is presented recently. In this paper) in an islanded microgrid. Unbalance compensation is achieved by sending proper control signals to the DGs local unbalance. Index Terms--Distributed generator (DG), hierarchical control, microgrid, secondary control

Vasquez, Juan Carlos

184

Model updating of a dynamic system in a high-temperature environment based on a hierarchical method  

Science Conference Proceedings (OSTI)

In the past, structural model updating methods have been widely researched as a means to reconcile mathematical models because the key parameters in dynamic systems often change during their life cycle due to repair and replacement of parts or the environment. ... Keywords: Analysis variance, FE model updating, Genetic algorithm, Hierarchical, High temperature, RBF predictor

He Cheng, Chen Guoping, He Huan, Sun Rujie

2013-12-01T23:59:59.000Z

185

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

186

Design  

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

Design Design of a Multithreaded Barnes-Hut Algorithm for Multicore Clusters Technical Report Junchao Zhang and Babak Behzad Department of Computer Science, University of Illinois at Urbana-Champaign {jczhang, bbehza2}@illinois.edu Marc Snir Department of Computer Science, University of Illinois at Urbana-Champaign and MCS Division, Argonne National Laboratory snir@anl.gov Abstract We describe in this paper an implementation of the Barnes-Hut al- gorithm on multicore clusters. Based on a partitioned global ad- dress space (PGAS) library, the design integrates intranode mul- tithreading and internode one-sided communication, exemplifying a PGAS + X programming style. Within a node, the computation is decomposed into tasks (subtasks), and multitasking is used to hide network latency. We study the tradeoffs between locality in private caches and locality in shared caches

187

Thermal analysis and cooling structure design of the primary collimator in CSNS/RCS  

E-Print Network (OSTI)

The rapid cycling synchrotron (RCS) of the China Spallation Neutron Source (CSNS) is a high intensity proton ring with beam power of 100 kW. In order to control the residual activation to meet the requirements of hands-on maintenance, a two-stage collimation system has been designed for the RCS. The collimation system consists of one primary collimator made of thin metal to scatter the beam and four secondary collimators as absorbers. Thermal analysis is an important aspect in evaluating the reliability of the collimation system. The calculation of the temperature distribution and thermal stress of the primary collimator with different materials is carried out by using ANSYS code. In order to control the temperature rise and thermal stress of the primary collimator to a reasonable level, an air cooling structure is intended to be used. The mechanical design of the cooling structure is presented, and the cooling effciency with different chin numbers and wind velocity is also analyzed. Finally, the fatigue life...

Zou, Yi-Qing; Kang, Ling; Qu, Hua-Min; He, Zhe-Xi; Yu, Jie-Bing; 10.1088/1674-1137/37/5/057004

2013-01-01T23:59:59.000Z

188

Static properties and multiaxial strength criterion for design of composite automotive structures  

DOE Green Energy (OSTI)

The Durability of Lightweight Composite Structures Project was established at Oak Ridge National Laboratory (ORNL) by the US Department of Energy to provide the experimentally-based, durability-driven design guidelines necessary to assure long-term structural integrity of automotive composite components. The initial focus of the ORNL Durability Project was on one representative reference material -- an isocyanurate (polyurethane) reinforced with continuous strand, swirl-mat E-glass. The present paper describes tensile, compressive, flexure, and shear testing and results for the reference composite. Behavioral trends and proportional limit are established for both tension and compression. Damage development due to tensile loading, strain rate effects, and effects of temperature are discussed. Furthermore, effects on static properties of various fluids, including water at room and elevated temperatures, salt water, antifreeze, windshield washer fluid, used motor oil, battery acid, gasoline, and brake fluid, were investigated. Effects of prior loading were evaluated as well. Finally, the effect of multiaxial loading on strength was determined, and the maximum shear strength criterion was identified for design.

Ruggles, M.B.; Yahr, G.T.; Battiste, R.L.

1998-11-01T23:59:59.000Z

189

A Multi-layer, Hierarchical Information Management System for the Smart Grid  

Science Conference Proceedings (OSTI)

This paper presents the modeling approach, methodologies, and initial results of setting up a multi-layer, hierarchical information management system (IMS) for the smart grid. The IMS allows its users to analyze the data collected by multiple control and communication networks to characterize the states of the smart grid. Abnormal, corrupted, or erroneous measurement data and outliers are detected and analyzed to identify whether they are caused by random equipment failures, unintentional human errors, or deliberate tempering attempts. Data collected from different information networks are crosschecked for data integrity based on redundancy, dependency, correlation, or cross-correlations, which reveal the interdependency between data sets. A hierarchically structured reasoning mechanism is used to rank possible causes of an event to aid the system operators to proactively respond or provide mitigation recommendations to remove or neutralize the threats. The model provides satisfactory performance on identifying the cause of an event and significantly reduces the need of processing myriads of data collected.

Lu, Ning; Du, Pengwei; Paulson, Patrick R.; Greitzer, Frank L.; Guo, Xinxin; Hadley, Mark D.

2011-10-10T23:59:59.000Z

190

Stochastic Analysis of Waterhammer and Applications in Reliability-Based Structural Design for Hydro Turbine Penstocks  

Science Conference Proceedings (OSTI)

Abstract: The randomness of transient events, and the variability in factors which influence the magnitudes of resultant pressure fluctuations, ensures that waterhammer and surges in a pressurized pipe system are inherently stochastic. To bolster and improve reliability-based structural design, a stochastic model of transient pressures is developed for water conveyance systems in hydropower plants. The statistical characteristics and probability distributions of key factors in boundary conditions, initial states and hydraulic system parameters are analyzed based on a large record of observed data from hydro plants in China; and then the statistical characteristics and probability distributions of annual maximum waterhammer pressures are simulated using Monte Carlo method and verified by the analytical probabilistic model for a simplified pipe system. In addition, the characteristics (annual occurrence, sustaining period and probability distribution) of hydraulic loads for both steady and transient states are discussed. Illustrating with an example of penstock structural design, it is shown that the total waterhammer pressure should be split into two individual random variable loads: the steady/static pressure and the waterhammer pressure rise during transients; and that different partial load factors should be applied to each individual load to reflect its unique physical and stochastic features. Particularly, the normative load (usually the unfavorable value at 95-percentage point) for steady/static hydraulic pressure should be taken from the probability distribution of its maximum values during the pipe's design life, while for waterhammer pressure rise, as the second variable load, the probability distribution of its annual maximum values is used to determine its normative load.

Zhang, Qin Fen [ORNL; Karney, Professor Byran W. [University of Toronto; Suo, Prof. Lisheng [Hohai University, China; Colombo, Dr. Andrew [University of Toronto

2011-01-01T23:59:59.000Z

191

Distributed energy-efficient hierarchical clustering for wireless sensor networks  

Science Conference Proceedings (OSTI)

Since nodes in a sensor network have limited energy, prolonging the network lifetime and improving scalability become important. In this paper, we propose a distributed weight-based energy-efficient hierarchical clustering protocol (DWEHC). Each node ...

Ping Ding; JoAnne Holliday; Aslihan Celik

2005-06-01T23:59:59.000Z

192

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

193

Rheological and morphological characterization of hierarchically nanostructured materials  

E-Print Network (OSTI)

Hierarchically nanostructured materials exhibit order on multiple length scales, with at least one of a few nanometers. The expected enhancements for applications using these materials include improved mechanical, thermal ...

Wang, Benjamin Ning-Haw

2007-01-01T23:59:59.000Z

194

Synthesis and characterization of ZnTe hierarchical nanostructures  

Science Conference Proceedings (OSTI)

Single-crystalline ZnTe hierarchical nanostructures have been successfully synthesized by a simple thermal evaporation technology. The as-prepared products were characterized with X-ray diffraction (XRD), scanning electron microcopy (SEM), transmission ...

Baohua Zhang; Fuqiang Guo; Wei Wang

2012-01-01T23:59:59.000Z

195

Bayesian Model Checking with Applications to Hierarchical Models  

E-Print Network (OSTI)

analysis and outliers in Bayesian hierarchical models. InK. and Brant R. (1988). A Bayesian approach to outlierH. and Chib S. (1996). Bayesian residual analysis for binary

R. E. Weiss

2011-01-01T23:59:59.000Z

196

Structural Hierarchies Define Toughness and Defect-Tolerance ...  

Science Conference Proceedings (OSTI)

Our analysis reveals drastic changes in the material crack-propagation resistance (R-curve) solely due to the introduction of hierarchical structures that also ...

197

High-resolution structural and thermodynamic analysis of extreme stabilization of human procarboxypeptidase by computational protein design  

E-Print Network (OSTI)

Recent efforts to design de novo or redesign the sequence and structure of proteins using computational techniques have met with significant success. Most, if not all, of these computational methodologies attempt to model atomic-level interactions, and hence high-resolution structural characterization of the designed proteins is critical for evaluating the atomic-level accuracy of the underlying design force-fields. We previously used our computational protein design protocol RosettaDesign to completely redesign the sequence of the activation domain of human procarboxypeptidase A2. With 68 % of the wild-type sequence changed, the designed protein, AYEdesign, is over 10 kcal/mol more stable than the wild-type protein. Here, we describe the high-resolution crystal structure and solution NMR structure of AYEdesign, which show that the experimentally determined backbone and side-chains conformations are effectively superimposable with the computational model at atomic resolution. To isolate the origins of the remarkable stabilization, we have designed and

Gautam Dantas; Colin Corrent; Steve L. Reichow; James J. Havranek; Ziad M. Eletr; Nancy G. Isern; Brian Kuhlman; Gabriele Varani; Ethan A. Merritt; David Baker; Howard Hughes Medical

2007-01-01T23:59:59.000Z

198

Synthesis and optical properties of hierarchical pure ZnO nanostructures  

SciTech Connect

We report the catalyst-free synthesis of hierarchical pure ZnO nanostructures with 6-fold structural symmetry by two-step thermal evaporation process. At the first step, the hexagonal-shaped nanowires consisting of a great deal of Zn and little oxide were prepared via the layer-by-layer growth mechanism; and at the second step, hierarchical pure ZnO nanostructures were synthesized by evaporating the Zn source on the basis of the step-one made substrate. Scanning electron microscopy, transmission electron microscope images, and the corresponding selected area electron diffraction pattern have been utilized to reveal the screw dislocation growth mechanism, through which the single crystal ZnO nanorods are epitaxially grown from the side-wall of central axial nanowires. Raman and photoluminescence spectra further indicate that, for the hierarchical ZnO nanostructures, the ultraviolet peak is related to the free exciton recombination, while the oxygen vacancies and high surface-to-volume ratio are responsible for the strong green peak emission.

Fan, D.H.; Zhu, Y.F. [Laboratory of Condensed Matter Spectroscopy and Opto-Electronic Physics, Department of Physics, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai 200030 (China); Shen, W.Z. [Laboratory of Condensed Matter Spectroscopy and Opto-Electronic Physics, Department of Physics, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai 200030 (China)], E-mail: wzshen@sjtu.edu.cn; Lu, J.J. [Laboratory of Condensed Matter Spectroscopy and Opto-Electronic Physics, Department of Physics, Shanghai Jiao Tong University, 1954 Hua Shan Road, Shanghai 200030 (China)

2008-12-01T23:59:59.000Z

199

Design and Performance Validation of a Wireless Sensing Unit for Structural Monitoring Applications  

E-Print Network (OSTI)

There exists a clear need to monitor the performance of civil structures over their operational lives. Current commercial monitoring systems suffer from various technological and economic limitations that prevent their widespread adoption. The wires used to route measurements from system sensors to the centralized data server represent one of the greatest limitations since they are physically vulnerable and expensive from an installation and maintenance standpoint. In lieu of cables, the introduction of low-cost wireless communications is proposed. The result is the design of a prototype wireless sensing unit that can serve as the fundamental building block of wireless modular monitoring systems (WiMMS). An additional feature of the wireless sensing unit is the incorporation of computational power in the form of state-of-art microcontrollers. The prototype unit is validated with a series of laboratory and field tests. The Alamosa Canyon Bridge is employed to serve as a full-scale benchmark structure to validate the performance of the wireless sensing unit in the field. A traditional cable-based monitoring system is installed in parallel with the wireless sensing units for performance comparison.

Jerome Peter Lynch; Kincho H. Law; Anne S. Kiremidjian; Ed Carryer

2004-01-01T23:59:59.000Z

200

Hierarchically Ordered Nanostructures from Functionalized Nano ...  

Science Conference Proceedings (OSTI)

Structural Competition and Phase Transformations in Binary Ti-Nb Alloys for Biomedical Applications · Structure and Fracture Resistance of Armored Fish Scales.

Note: This page contains sample records for the topic "hierarchical structure designed" 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

Insect Joints: Hierarchical Biocomposites with Superior Mechanical ...  

Science Conference Proceedings (OSTI)

Structural Competition and Phase Transformations in Binary Ti-Nb Alloys for Biomedical Applications · Structure and Fracture Resistance of Armored Fish Scales.

202

The Multilevel Grid File {A Dynamic Hierarchical Multidimensional File Structure  

E-Print Network (OSTI)

ABSTRACT: We present a new dynamic hashed file organization that solves most problems associated with the directory of the grid file proposed by Nievergelt et al. Our scheme is a multilevel extension of the grid file that supports multiattribute accesses to the file for exact-match, partialmatch, and range queries as well as graceful expansion and shrinkage of the file in a dynamic environment. This new file organization offers a number of advantages over the grid file such as compact representation of the directory, linear growth of the directory in the number of records, easy splitting and merging of the directory, efficient processing of partial-match queries, and finer granularity of the directory. Moreover, it provides a new concept, calledabshuct d, that can be employed in practical database applications. 1.

Kyu-young Whang; Ravi Krishnamurthy

1991-01-01T23:59:59.000Z

203

Hybrid direct write lithographic strategies for complex hierarchical structures  

E-Print Network (OSTI)

With the number of alternative lithographic techniques for high resolution and 3D patterning rapidly increasing, there is a need to identify a set of scalable techniques which balances the ability to arbitrarily control ...

Singer, Jonathan P. (Jonathan Phillip)

2013-01-01T23:59:59.000Z

204

Hierarchical modeling of structure and mechanics of cement hydrate  

E-Print Network (OSTI)

With an annual production of more than 20 billion tons a year, concrete continues to be the world's dominating manufacturing material for a foreseeable future. However, this ubiquity comes with a large ecological price as ...

Shahsavari, Rouzbeh

2011-01-01T23:59:59.000Z

205

Optimization of Hierarchical Lattice Structures for Energy Absorption  

Science Conference Proceedings (OSTI)

... potential to outperform foams in many applications, including energy absorption. ... of Fe-C Alloy as a Function of Cooling Rate and Local Solidification Time.

206

Hierarchical Partitioning Techniques for Structured Adaptive Mesh Refinement Applications  

E-Print Network (OSTI)

connected end uses and eliminate the associate "vampire load"when not in use, but a uniform test and rating

207

Spontaneous motion in hierarchically assembled active matter  

E-Print Network (OSTI)

With exquisite precision and reproducibility, cells orchestrate the cooperative action of thousands of nanometer-sized molecular motors to carry out mechanical tasks at much larger length scales, such as cell motility, division and replication. Besides their biological importance, such inherently non-equilibrium processes are an inspiration for developing biomimetic active materials from microscopic components that consume energy to generate continuous motion. Being actively driven, these materials are not constrained by the laws of equilibrium statistical mechanics and can thus exhibit highly sought-after properties such as autonomous motility, internally generated flows and self-organized beating. Starting from extensile microtubule bundles, we hierarchically assemble active analogs of conventional polymer gels, liquid crystals and emulsions. At high enough concentration, microtubules form a percolating active network characterized by internally driven chaotic flows, hydrodynamic instabilities, enhanced transport and fluid mixing. When confined to emulsion droplets, 3D networks spontaneously adsorb onto the droplet surfaces to produce highly active 2D nematic liquid crystals whose streaming flows are controlled by internally generated fractures and self-healing, as well as unbinding and annihilation of oppositely charged disclination defects. The resulting active emulsions exhibit unexpected properties, such as autonomous motility, which are not observed in their passive analogues. Taken together, these observations exemplify how assemblages of animate microscopic objects exhibit collective biomimetic properties that are starkly different from those found in materials assembled from inanimate building blocks, challenging us to develop a theoretical framework that would allow for a systematic engineering of their far-from-equilibrium material properties.

Tim Sanchez; Daniel T. N. Chen; Stephen J. DeCamp; Michael Heymann; Zvonimir Dogic

2013-01-07T23:59:59.000Z

208

Probability based load criteria for the design of nuclear structures: a critical review of the state-of-the-art  

Science Conference Proceedings (OSTI)

Structures for nuclear power plant facilities must be designed to withstand safely and effectively all kinds of loads and load combinations that may be expected to occur during their lifetime. The traditional methods of structural design attempt to account for the inevitable variability in the loads, material strengths, in-service environments, and fabrication process, etc., through the use of safety factor, allowable stresses or load and resistance factors. These approaches may result in an unknown and nonuniform reliability because of the subjective manner in which the safety factors have been determined. The stochastic nature loads and the uncertainties in material properties dictate a probabilistic approach for a rational assessment of structural safety and performance. This report presents: an in-depth review of the state-of-the-art pertaining to probability-based analysis and design of civil engineering structures; basis for extending existing probability-based methods to seismic category I nuclear structures; and the availability of the pertinent data required to perform probabilistic analysis for seismic category I nuclear structures.

Shinozuka, M.; Ellingwood, B.R.; Wang, P.C.; Meyer, C.; Wen, Y.K.; Kao, S.; Shooman, M.L.; Philippacopoulos, A.J.

1981-04-01T23:59:59.000Z

209

Technical note: Recent advances in sharing standardized STEP composite structure design and manufacturing information  

Science Conference Proceedings (OSTI)

Composite structures have been developed and used in the aerospace, automobile, sports, and marine industries since the early 1940s. Compared to conventional metallic structures, newer high-performance composite structures provide benefits such as decreased ... Keywords: AP209, Composite structures, Data exchange, ISO 10303, Long-term data retention, STEP

Keith A. Hunten, Allison Barnard Feeney, Vijay Srinivasan

2013-10-01T23:59:59.000Z

210

A Review of Two different Approaches for the Analysis of Growth Data Using Longitudinal Mixed Linear Models: Comparing Hierarchical Linear Regression (ML3), HLM) and Repeated Measures Designs with Structured Covariance Matrices (BMDP5V)  

E-Print Network (OSTI)

analyses involving very large data sets. ML3/E is especially compiled for personal computers with expanded RAM (

Rien van der Leeden; Karen Vrijburg; Jan de Leeuw

2011-01-01T23:59:59.000Z

211

Model Based Structural Evaluation & Design of Overpack Container for Bag-Buster Processing of TRU Waste Drums  

Science Conference Proceedings (OSTI)

This paper describes a materials and computational model based analysis utilized to design an engineered “overpack” container capable of maintaining structural integrity for confinement of transuranic wastes undergoing the cryo-vacuum stress based “Bag-Buster” process and satisfying DOT 7A waste package requirements. The engineered overpack is a key component of the “Ultra-BagBuster” process/system being commercially developed by UltraTech International for potential DOE applications to non-intrusively breach inner confinement layers (poly bags/packaging) within transuranic (TRU) waste drums. This system provides a lower cost/risk approach to mitigate hydrogen gas concentration buildup limitations on transport of high alpha activity organic transuranic wastes. Four evolving overpack design configurations and two materials (low carbon steel and 300 series stainless) were considered and evaluated using non-linear finite element model analyses of structural response. Properties comparisons show that 300-series stainless is required to provide assurance of ductility and structural integrity at both room and cryogenic temperatures. The overpack designs were analyzed for five accidental drop impact orientations onto an unyielding surface (dropped flat on bottom, bottom corner, side, top corner, and top). The first three design configurations failed the bottom and top corner drop orientations (flat bottom, top, and side plates breached or underwent material failure). The fourth design utilized a protruding rim-ring (skirt) below the overpack’s bottom plate and above the overpack’s lid plate to absorb much of the impact energy and maintained structural integrity under all accidental drop loads at both room and cryogenic temperature conditions. Selected drop testing of the final design will be required to confirm design performance.

D. T. Clark; A. S. Siahpush; G. L. Anderson

2004-07-01T23:59:59.000Z

212

Designing for uncertainty : novel shapes and behaviors using scissor-pair transformable structures  

E-Print Network (OSTI)

Much current research in design and computation, within an architectural framework, aims to reduce uncertainty as much as possible. The general belief is that, during the conceptual design process, the certainty about the ...

Rosenberg, Daniel, S.M. Massachusetts Institute of Technology

2009-01-01T23:59:59.000Z

213

SID-GA: An evolutionary approach for improving observability and redundancy analysis in structural instrumentation design  

Science Conference Proceedings (OSTI)

In this paper the core of a genetic algorithm designed to define a sensor network for instrumentation design (ID) is presented. The tool has been incorporated into a decision support system (DSS) that assists the engineer during the ID process. The algorithm ... Keywords: Combinatorial optimization problem, Decision support system, Genetic algorithms, Instrumentation design

Jessica A. Carballido; Ignacio Ponzoni; Nélida B. Brignole

2009-05-01T23:59:59.000Z

214

CONCEPTUAL DESIGN REPORT  

Science Conference Proceedings (OSTI)

Brookhaven National Laboratory has prepared a conceptual design for a world class user facility for scientific research using synchrotron radiation. This facility, called the ''National Synchrotron Light Source II'' (NSLS-II), will provide ultra high brightness and flux and exceptional beam stability. It will also provide advanced insertion devices, optics, detectors, and robotics, and a suite of scientific instruments designed to maximize the scientific output of the facility. Together these will enable the study of material properties and functions with a spatial resolution of {approx}1 nm, an energy resolution of {approx}0.1 meV, and the ultra high sensitivity required to perform spectroscopy on a single atom. The overall objective of the NSLS-II project is to deliver a research facility to advance fundamental science and have the capability to characterize and understand physical properties at the nanoscale, the processes by which nanomaterials can be manipulated and assembled into more complex hierarchical structures, and the new phenomena resulting from such assemblages. It will also be a user facility made available to researchers engaged in a broad spectrum of disciplines from universities, industries, and other laboratories.

ROBINSON,K.

2006-12-31T23:59:59.000Z

215

High-sensitive sensor of dopamine based on photoluminescence quenching of hierarchical CdS spherical aggregates  

Science Conference Proceedings (OSTI)

Hierarchical CdS spherical aggregates have been fabricated by an assembling strategy starting from nanoparticles, which opens a general way to obtain hierarchical spherical aggregates of different types of materials. The hierarchical CdS spherical aggregates ...

Binjie Sun, Changzheng Wang

2012-01-01T23:59:59.000Z

216

Federal and State Structures to Support Financing Utility-Scale Solar Projects and the Business Models Designed to Utilize Them  

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

Federal and State Structures to Federal and State Structures to Support Financing Utility-Scale Solar Projects and the Business Models Designed to Utilize Them Michael Mendelsohn and Claire Kreycik Technical Report NREL/TP-6A20-48685 April 2012 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 15013 Denver West Parkway Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308 Federal and State Structures to Support Financing Utility-Scale Solar Projects and the Business Models Designed to Utilize Them Michael Mendelsohn and Claire Kreycik Prepared under Task No. CP09.2320

217

Physical Similitude in Hierarchical Engineered Systems  

E-Print Network (OSTI)

Hanford who first formally introduced system hierarchy and the concept of ‘defense-in-depth’ into re- actor design and construction [construction of the plutonium production complex starting initially at Oak Ridge and ultimately being completed at the Hanford

Blandford, Edward David

2010-01-01T23:59:59.000Z

218

Discriminative training of hierarchical acoustic models for large vocabulary continuous speech recognition  

E-Print Network (OSTI)

In this paper we propose discriminative training of hierarchical acoustic models for large vocabulary continuous speech recognition tasks. After presenting our hierarchical modeling framework, we describe how the models ...

Chang, Hung-An

219

OWA-based linkage method in hierarchical clustering: Application on phylogenetic trees  

Science Conference Proceedings (OSTI)

The linkage methods are mostly used in hierarchical clustering. In this paper, we integrate Ordered Weighted Averaging (OWA) operator with hierarchical clustering in order to find distances between clusters. In case of using OWA operator in order to ... Keywords: Hierarchical clustering, OWA operator, Phylogenetic tree, Protein sequence

Efendi Nas?bov; Cagin Kandem?r-Cavas

2011-09-01T23:59:59.000Z

220

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 "hierarchical structure designed" 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

Multiobjective hierarchical control architecture for greenhouse crop growth  

Science Conference Proceedings (OSTI)

The problem of determining the trajectories to control greenhouse crop growth has traditionally been solved by using constrained optimization or applying artificial intelligence techniques. The economic profit has been used as the main criterion in most ... Keywords: Agriculture, Hierarchical systems, Optimization methods, Process control, Yield optimization

A. Ramírez-Arias; F. Rodríguez; J. L. Guzmán; M. Berenguel

2012-03-01T23:59:59.000Z

222

Image denoising based on hierarchical Markov random field  

Science Conference Proceedings (OSTI)

We propose a hierarchical Markov random field model-based method for image denoising in this paper. The method employs a Markov random field (MRF) model with three layers. The first layer represents the underlying texture regions. The second layer represents ... Keywords: Bayesian estimation, Image denoising, Markov random field

Yang Cao; Yupin Luo; Shiyuan Yang

2011-01-01T23:59:59.000Z

223

News to go: hierarchical text summarization for mobile devices  

Science Conference Proceedings (OSTI)

We present an evaluation of a novel hierarchical text summarization method that allows users to view summaries of Web documents from small, mobile devices. Unlike previous approaches, ours does not require the documents to be in HTML since it infers ... Keywords: mobile computing, summarization

Jahna Otterbacher; Dragomir Radev; Omer Kareem

2006-08-01T23:59:59.000Z

224

Hierarchical-Battery Aware Routing in Wireless Sensor Networks  

E-Print Network (OSTI)

Hierarchical-Battery Aware Routing in Wireless Sensor Networks Ravi Musunuri Jorge A. Cobb monitoring applications. Pulsed battery discharge from the nodes prolongs the battery capacity as compared to constant discharge. Idle time between the pulses of discharge helps in recovering the discharged battery

Cobb, Jorge Arturo

225

A Study of Hierarchical and Flat Classification of Proteins  

Science Conference Proceedings (OSTI)

Automatic classification of proteins using machine learning is an important problem that has received significant attention in the literature. One feature of this problem is that expert-defined hierarchies of protein classes exist and can potentially ... Keywords: Protein classification, hierarchical classification, multiclass classification.

Arthur Zimek; Fabian Buchwald; Eibe Frank; Stefan Kramer

2010-07-01T23:59:59.000Z

226

A Hierarchical Bayesian Approach to Seasonal Hurricane Modeling  

Science Conference Proceedings (OSTI)

A hierarchical Bayesian strategy for modeling annual U.S. hurricane counts from the period 1851–2000 is illustrated. The approach is based on a separation of the reliable twentieth-century records from the less precise nineteenth-century records ...

James B. Elsner; Thomas H. Jagger

2004-07-01T23:59:59.000Z

227

A hierarchical reliability-driven scheduling algorithm in grid systems  

Science Conference Proceedings (OSTI)

In a Grid computing system, many distributed scientific and engineering applications often require multi-institutional collaboration, large-scale resource sharing, wide-area communication, etc. Applications executing in such systems inevitably encounter ... Keywords: Application, Grid computing, Hierarchical, Reliability, Scheduling algorithm

Xiaoyong Tang; Kenli Li; Meikang Qiu; Edwin H. -M. Sha

2012-04-01T23:59:59.000Z

228

Hierarchical Verification for Increasing Performance in Reliable Processors  

Science Conference Proceedings (OSTI)

Dynamic verification using the checker processor introduces severe degradation in performance unless the checker is as fast as the main processor core. Without widening the checker's bandwidth, we propose an active verification management (AVM) approach ... Keywords: Active verification management, Correctness non-critically, Fault tolerance, Filter checker, Hierarchical verification, Performance

Joonhyuk Yoo; Manoj Franklin

2008-06-01T23:59:59.000Z

229

Soil structure interaction for shrink-swell soils a new design procedure for foundation slabs on shrink-swell soils  

E-Print Network (OSTI)

Problems associated with shrink-swell soils are well known geotechnical problems that have been studied and researched by many geotechnical researchers for many decades. Potentially shrink-swell soils can be found almost anywhere in the world especially in the semi-arid regions of the tropical and temperate climate. Foundation slabs on grade on shrink-swell soils are one of the most efficient and inexpensive solutions for this kind of problematic soil. It is commonly used in residential foundations or any light weight structure on shrink-swell soils. Many design methods have been established for this specific problem such as Building Research Advisory Board (BRAB), Wire Reinforcement Institute (WRI), Post- Tensioning Institute (PTI), and Australian Standards (AS 2870) design methods. This research investigates most of these methods, and then, proposes a moisture diffusion soil volume change model, a soil-weather interaction model, and a soil-structure interaction model. The proposed moisture diffusion soil volume change model starts with proposing a new laboratory test to determine the coefficient of unsaturated diffusivity for intact soils. Then, it introduces the development of a cracked soil diffusion factor, provides a chart for it, and explains a large scale laboratory test that verifies the proposed moisture diffusion soil volume change model. The proposed soil-weather interaction model uses the FAO 56-PM method to simulate a weightless cover performance for six cities in the US that suffer significantly from shallow foundation problems on shrink-swell soils due to seasonal weather variations. These simulations provide more accurate weather site-specific parameters such as the range of surface suction variations. The proposed weather-site specific parameters will be input parameters to the soil structure models. The proposed soil-structure interaction model uses Mitchell (1979) equations for moisture diffusion under covered soil to develop a new closed form solution for the soil mound shape under the foundation slab. Then, it presents a parametric study by carrying out several 2D finite elements plane strain simulations for plates resting on a semiinfinite elastic continuum and resting on different soil mounds. The parametric study outcomes are then presented in design charts that end with a new design procedure for foundation slabs on shrink-swell soils. Finally, based on the developed weather-soil-structure interaction models, this research details two procedures of a proposed new design method for foundation slabs on grade on shrink-swell soils: a suction based design procedure and a water content based design procedure.

Abdelmalak, Remon Melek

2007-12-01T23:59:59.000Z

230

Portals to an Architecture: Design of a temporary structure with paper tube arches Steven J. Preston  

E-Print Network (OSTI)

containers and large paper tubes to create a 56,000 square- foot (5200 square-meter) space [10]. In 2008, and low cost. Spirally wound paper tubes are highly engineered structural products made of different for both per- manent and temporary structures. Less frequently, paper tubes have been utilized in curved

Bank, Lawrence C.

231

Design of an ultra-low power device for aircraft structural health monitoring  

Science Conference Proceedings (OSTI)

One of the popular structural health monitoring (SHM) applications of both automotive and aeronautic fields is devoted to the non-destructive localization of impacts in plate-like structures. The aim of this paper is to develop a miniaturized, self-contained ...

Alessandro Perelli, Carlo Caione, Luca De Marchi, Davide Brunelli, Alessandro Marzani, Luca Benini

2013-03-01T23:59:59.000Z

232

Design of RF Feed System for Standing-Wave Accelerator Structures  

Science Conference Proceedings (OSTI)

We are investigating a standing wave accelerator structure that uses a rf feed to each individual cell. This approach minimizes rf power flow and electromagnetic energy absorbed by an rf breakdown. The objective of this work is a robust high-gradient (above 100 MV/m) X-band accelerator structure.

Neilson, J.; Tantawi, S.; Dolgashev, V.; /SLAC

2012-05-25T23:59:59.000Z

233

Design and Analysis for the Carbon Fiber Composite Support Structure for Layer 0 of the D0 Silicon Micro Tracker  

Science Conference Proceedings (OSTI)

The support structures for the new Layer 0 (Figures 1, 2, 3) of the Run 2b silicon tracker in D0 were designed and fabricated at the University of Washington. These structures were required to have minimum mass, yet be very rigid so as to meet the high precision requirements placed on the position of the silicon detector chips. They also have to provide for cooling to remove the heat generated by the sensors and signal processing electronics and to keep the sensors at the desired operating temperature (below -5 C). All of these requirements were best met by carbon fiber/epoxy composite technology. State of the art carbon fiber materials have extremely high Young's moduli and high thermal conductivity. Appropriate fiber lay-ups and fabrication methods have been developed and used successfully to produce both various prototype structures and the structures used in the production Layer 0. The geometry of these structures was determined mainly by the geometry of the sensors themselves. The structures incorporated a complete cooling system consisting of extruded PEEK coolant tubes and distribution manifolds made from carbon fiber composites. In order to determine the mechanical and thermal performance of the structures, detailed FEA analyses of L0 have been carried out and are described.

Daly, C.H.; Tuttle, Mark E.; Kuykendall, William; /Washington U., Seattle

2009-01-01T23:59:59.000Z

234

ASSESSMENT OF THE RELEVANCE OF DISPLACEMENT BASED DESIGN METHODS/CRITERIA TO NUCLEAR PLANT STRUCTURES.  

Science Conference Proceedings (OSTI)

Revisions to the USNRC Regulatory Guides and Standard Review Plan Sections devoted to earthquake engineering practice are currently in process. The intent is to reflect changes in engineering practice that have evolved in the twenty years that have passed since those criteria were originally published. Additionally, field observations of the effects of the Northridge (1994) and Kobe (1995) earthquakes have inspired some reassessment in the technical community about certain aspects of design practice. In particular, questions have arisen about the effectiveness of basing earthquake resistant designs on resistance to seismic forces and, then evaluating tolerability of the expected displacements. Therefore, a research effort was undertaken to examine the implications for NRC's seismic practice of the move, in the earthquake engineering community, toward using expected displacement rather than force (or stress) as the basis for assessing design adequacy. The results of the NRC sponsored research on this subject are reported in this paper. A slow trend toward the utilization of displacement based methods for design was noted. However, there is a more rapid trend toward the use of displacement based methods for seismic evaluation of existing facilities. A document known as FEMA 273, has been developed and is being used as the basis for the design of modifications to enhance the seismic capability of existing non-nuclear facilities. The research concluded that displacement based methods, such as given in FEMA 273, may be useful for seismic margin studies of existing nuclear power stations. They are unlikely to be useful for the basic design of new stations since nuclear power stations are designed to remain elastic during a seismic event. They could, however, be useful for estimating the margins associated with that design.

HOFMAYER,C.; MILLER,C.; WANG,Y.; COSTELLO,J.

2001-08-12T23:59:59.000Z

235

Federal and State Structures to Support Financing Utility-Scale Solar Projects and the Business Models Designed to Utilize Them  

DOE Green Energy (OSTI)

Utility-scale solar projects have grown rapidly in number and size over the last few years, driven in part by strong renewable portfolio standards (RPS) and federal incentives designed to stimulate investment in renewable energy technologies. This report provides an overview of such policies, as well as the project financial structures they enable, based on industry literature, publicly available data, and questionnaires conducted by the National Renewable Energy Laboratory (NREL).

Mendelsohn, M.; Kreycik, C.

2012-04-01T23:59:59.000Z

236

The sizing rules method for analog integrated circuit design  

Science Conference Proceedings (OSTI)

This paper presents the sizing rules method for analog CMOS circuit design that consists of: first, the development of a hierarchical library of transistor pair groups as basic building blocks for analog CMOS circuits; second, the derivation of ...

H. Graeb; S. Zizala; J. Eckmueller; K. Antreich

2001-11-01T23:59:59.000Z

237

Wind Pressure Resistance of Walls with Exterior Rigid Foam: Structural Performance Testing and Development of Design Specifications  

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

Wind Pressure Resistance of Wind Pressure Resistance of Walls with Exterior Rigid Foam: Structural Performance Testing and Development of Design Specifications Building America Stakeholder Meeting February 2012 2 Gaps and Barriers  Wind pressure resistance of multi- layered walls with exterior rigid foam * Performance characteristics * Capacity * Limitations * Design method * Design specification 3 Market Implications  Walls with exterior rigid foam  2012 IECC - Climate Zones 3 and higher  Wall systems:  Claddings and their attachments  Interior finishes  Air sealing, air barriers  Cavity insulation 4 Research Tasks  Laboratory Testing of Wall Assemblies under dynamic wind pressures at the NAHB Research Center  NAHB/DOE/ACC  Laboratory Testing of a One-story House in IBHS Wind Tunnel Facility

238

Application of Bayesian Hierarchical Models in Genetic Data Analysis  

E-Print Network (OSTI)

Genetic data analysis has been capturing a lot of attentions for understanding the mechanism of the development and progressing of diseases like cancers, and is crucial in discovering genetic markers and treatment targets in medical research. This dissertation focuses on several important issues in genetic data analysis, graphical network modeling, feature selection, and covariance estimation. First, we develop a gene network modeling method for discrete gene expression data, produced by technologies such as serial analysis of gene expression and RNA sequencing experiment, which generate counts of mRNA transcripts in cell samples. We propose a generalized linear model to fit the discrete gene expression data and assume that the log ratios of the mean expression levels follow a Gaussian distribution. We derive the gene network structures by selecting covariance matrices of the Gaussian distribution with a hyper-inverse Wishart prior. We incorporate prior network models based on Gene Ontology information, which avails existing biological information on the genes of interest. Next, we consider a variable selection problem, where the variables have natural grouping structures, with application to analysis of chromosomal copy number data. The chromosomal copy number data are produced by molecular inversion probes experiments which measure probe-specific copy number changes. We propose a novel Bayesian variable selection method, the hierarchical structured variable se- lection (HSVS) method, which accounts for the natural gene and probe-within-gene architecture to identify important genes and probes associated with clinically relevant outcomes. We propose the HSVS model for grouped variable selection, where simultaneous selection of both groups and within-group variables is of interest. The HSVS model utilizes a discrete mixture prior distribution for group selection and group-specific Bayesian lasso hierarchies for variable selection within groups. We further provide methods for accounting for serial correlations within groups that incorporate Bayesian fused lasso methods for within-group selection. Finally, we propose a Bayesian method of estimating high-dimensional covariance matrices that can be decomposed into a low rank and sparse component. This covariance structure has a wide range of applications including factor analytical model and random effects model. We model the covariance matrices with the decomposition structure by representing the covariance model in the form of a factor analytic model where the number of latent factors is unknown. We introduce binary indicators for estimating the rank of the low rank component combined with a Bayesian graphical lasso method for estimating the sparse component. We further extend our method to a graphical factor analytic model where the graphical model of the residuals is of interest. We achieve sparse estimation of the inverse covariance of the residuals in the graphical factor model by employing a hyper-inverse Wishart prior method for a decomposable graph and a Bayesian graphical lasso method for an unrestricted graph.

Zhang, Lin

2012-12-01T23:59:59.000Z

239

Polarization-balanced design of AlN/GaN heterostructures: Application to double-barrier structures  

E-Print Network (OSTI)

Inversion- and depletion- regions generally form at the interfaces between doped leads (cladding layers) and the active region in wurtzite c-plane AlN/GaN heterostructures. The band bending in the depletion region can seriously impede perpendicular electronic transport. To counter the formation of these regions, we consider polarization-balanced designs of AlN/GaN heterostructures based on matching the applied bias to the internal voltage drop arising from spontaneous and piezeolectric fields. To retain freedom of design we use alloyed Al$_{\\tilde{x}}$Ga$_{1-\\tilde{x}}$N leads. Use of pure GaN leads requires huge voltage drops which severely restricts design. The alloy concentration $\\tilde{x}$ tunes the internal voltage drop over the structure. For short active regions comprised of AlN and GaN layers, we derive a simple relation between the applied bias, average alloy composition of the active region, and the alloy concentration of the leads. We study polarization-balanced designs for AlN barriers structures...

Berland, Kristian; Hyldgaard, Per

2011-01-01T23:59:59.000Z

240

The role of computer-aided drafting, analysis, and design software in structural engineering practice  

E-Print Network (OSTI)

Perhaps the greatest innovation in engineering in the last fifty years, computer software has changed the way structural engineers conduct nearly every aspect of their daily business. Computer-aided drafting, analysis, and ...

De los Reyes, Adrian

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hierarchical structure designed" 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

Empirical analysis of masonry walls : structural design and seismic reinforcement through tilting experiments  

E-Print Network (OSTI)

Masonry is a fundamental building material that is used for a significant proportion of structures across the world, many of which lie in potentially hazardous environments. While masonry naturally has poor performance ...

Jimenez, Daniel D. (Daniel David)

2011-01-01T23:59:59.000Z

242

Towards and embeddable structural health monitoring sensor : design and optimization of MEMS piezoelectric vibration energy harvesters  

E-Print Network (OSTI)

Wireless structural health monitoring (SHM) has gained considerable interest as a potential method of reducing aircraft maintenance costs while increasing safety. Distributed power supplies for the sensing nodes are needed ...

Mracek, Anna Marie

2006-01-01T23:59:59.000Z

243

Aquatecture : underwater dwellings and sea born structures as paradigms of design  

E-Print Network (OSTI)

There are many reasons for undertaking a work such as this. Among them are the benefits offered to society when we acknowledge the potential of submersible structures, The provision of habitable underwater space remains ...

Guillermo, Ricardo

1982-01-01T23:59:59.000Z

244

Impact of Mobility on Structure-Based Drug Design for the MMPs Franklin J. Moy, Pranab K. Chanda, James Chen, Scott Cosmi, Wade Edris, Jeremy I. Levin,  

E-Print Network (OSTI)

Impact of Mobility on Structure-Based Drug Design for the MMPs Franklin J. Moy, Pranab K. Chanda and Chemical Sciences, Wyeth Research, 401 North Middletown Road, Pearl RiVer, New York 10965 Received June 20 design of new drug candidates (for reviews, see refs 1-4). The beneficial impact of structure- based

Powers, Robert

245

Structural Composites Industries 4 kilowatt wind system development. Phase I: design and analysis, technical report  

DOE Green Energy (OSTI)

A 4 kW small wind energy conversion system (SWECS) has been designed for residential applications in which relatively low (10 mph) mean annual wind speeds prevail. The objectives were to develop such a machine to produce electrical energy at 6 cents per kWh while operating in parallel with a utility grid or auxiliary generator. The Phase I effort began in November, 1979 and was carried through the Final Design Review in February 1981. During this period extensive trade, optimization and analytical studies were performed in an effort to provide the optimum machine to best meet the objectives. Certain components, systems and manufacturing processes were tested and evaluated and detail design drawings were produced. The resulting design is a 31-foot diameter horizontal axis downwind machine rated 5.7 kW and incorporating the following unique features: Composite Blades; Free-Standing Composite Tower; Torque-Actuated Blade Pitch Control. The design meets or exceeds all contract requirements except that for cost of energy. The target 6 cents per kWh will be achieved in a mean wind speed slightly below 12 mph instead of the specified 10 mph.

Malkine, N.; Bottrell, G.; Weingart, O.

1981-05-01T23:59:59.000Z

246

Using Dynamic Quantum Clustering to Analyze Hierarchically Heterogeneous Samples on the Nanoscale  

SciTech Connect

Dynamic Quantum Clustering (DQC) is an unsupervised, high visual data mining technique. DQC was tested as an analysis method for X-ray Absorption Near Edge Structure (XANES) data from the Transmission X-ray Microscopy (TXM) group. The TXM group images hierarchically heterogeneous materials with nanoscale resolution and large field of view. XANES data consists of energy spectra for each pixel of an image. It was determined that DQC successfully identifies structure in data of this type without prior knowledge of the components in the sample. Clusters and sub-clusters clearly reflected features of the spectra that identified chemical component, chemical environment, and density in the image. DQC can also be used in conjunction with the established data analysis technique, which does require knowledge of components present.

Hume, Allison; /Princeton U. /SLAC

2012-09-07T23:59:59.000Z

247

Design Guidance for Bolted Connections in Structures of Pultruded Shapes: Gaps in Knowledge  

E-Print Network (OSTI)

-years of work, in the design recommendations given in Part 3 of the MIL-17-HDBK [16]. To achieve the highest.eurocodes.co.uk/ 30/04/09. 16. MIL-HDBK-17-3F, Composite Materials Handbook, Volume 3. Polymer Matrix Composites

Mottram, Toby

248

esim: A Structural Design Language and Simulator for Computer Architecture Education  

E-Print Network (OSTI)

can simulate and debug their designs using a simulator implemented as a Tcl module. Because esim distributable, and may be expanded using standard Tcl packages and Tcl code. Current simulator modules include on an inexpensive PC running Linux or other Unix-like operating system. The simulator is implemented as a Tcl [6

Miller, Ethan L.

249

Structural Composites Industries 4-kilowatt wind-system development. Phase I. Design and analysis executive summary  

DOE Green Energy (OSTI)

A 4 kW small wind energy conversion system (SWECS) has been designed for residential applications in which relatively low (10 mph) mean annual wind speeds prevail. The objectives were to develop such a machinee to produce electrical energy at 6 cents per kWh while operating in parallel with a utility grid or auxiliary generator. Extensive trade, optimization and analytical studies were performed in an effort to provide the optimum machine to best meet the objectives. Certain components, systems and manufacturing processes were tested and evaluated and detail design drawings were produced. The resulting design is a 31-foot diameter horizontal axis downwind machine rated 5.7 kW and incorporating composite blades; free-standing composite tower; and torque-actuated blade pitch control. The design meets or exceeds all contract requirements except that for cost of energy. The target 6 cents per kWh will be achieved in a mean wind speed slightly below 12 mph instead of the specified 10 mph.

Malkine, N.; Bottrell, G.; Weingart, O.

1981-05-01T23:59:59.000Z

250

Sandia National Labs: PCNSC: Research: Collective Hierarchical Systems  

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

Collective Hierarchical Systems: Collective Hierarchical Systems: Developing life-emulating technologies by exploiting the physics of far-from-equilibrium, self-assembling systems What is it? We want to establish the Physical, Chemical and Nano Sciences Center and Sandia National Laboratories as major players in developing the interdisciplinary science of complex, far-from-equilibrium, self-assembling systems. These are systems that self-assemble highly organized states dynamically, across multiple length scales, through the constant flow-through and consumption of energy and material. Such driven systems, in contrast to equilibrated systems, can, in special cases, develop the key capability of representing, maintaining and modifying information. Such systems also typically bridge multiple length scales by developing

251

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

252

Hierarchical fuzzy control of low-energy building systems  

Science Conference Proceedings (OSTI)

A hierarchical fuzzy supervisory controller is described that is capable of optimizing the operation of a low-energy building, which uses solar energy to heat and cool its interior spaces. The highest level fuzzy rules choose the most appropriate set of lower level rules according to the weather and occupancy information; the second level fuzzy rules determine an optimal energy profile and the overall modes of operation of the heating, ventilating and air-conditioning system (HVAC); the third level fuzzy rules select the mode of operation of specific equipment, and assign schedules to the local controllers so that the optimal energy profile can be achieved in the most efficient way. Computer simulation is used to compare the hierarchical fuzzy control scheme with a supervisory control scheme based on expert rules. The performance is evaluated by comparing the energy consumption and thermal comfort. (author)

Yu, Zhen; Dexter, Arthur [Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ (United Kingdom)

2010-04-15T23:59:59.000Z

253

Seismic design technology for breeder reactor structures. Volume 1. Special topics in earthquake ground motion  

Science Conference Proceedings (OSTI)

This report is divided into twelve chapters: seismic hazard analysis procedures, statistical and probabilistic considerations, vertical ground motion characteristics, vertical ground response spectrum shapes, effects of inclined rock strata on site response, correlation of ground response spectra with intensity, intensity attenuation relationships, peak ground acceleration in the very mean field, statistical analysis of response spectral amplitudes, contributions of body and surface waves, evaluation of ground motion characteristics, and design earthquake motions. (DLC)

Reddy, D.P.

1983-04-01T23:59:59.000Z

254

The Design of the PROMIS Compiler—Towards Multi-Level Parallelization  

Science Conference Proceedings (OSTI)

Most systems that are under design and likely to be built in the future will employ hierarchical organization with many levels of memory hierarchy and parallelism. In order to efficiently utilize the multiple levels of parallelism available in the target ... Keywords: HTG (hierarchical task graph), ILP (instruction-level parallelization), IR (internal representation), compiler, loop parallelization

Hideki Saito; Nicholas J. Stavrakos; Constantine D. Polychronopoulos; Alex Nicolau

2000-04-01T23:59:59.000Z

255

The structural design of electrode materials for high energy lithium batteries.  

Science Conference Proceedings (OSTI)

Lithium batteries are used to power a diverse range of applications from small compact devices, such as smart cards and cellular telephones to large heavy duty devices such as uninterrupted power supply units and electric- and hybrid-electric vehicles. This paper briefly reviews the approaches to design advanced materials to replace the lithiated graphite and LiCoO{sub 2} electrodes that dominate today's lithium-ion batteries in order to increase their energy and safety. The technological advantages of lithium batteries are placed in the context of water-based- and high-temperature battery systems.

Thackeray, M.; Chemical Sciences and Engineering Division

2007-01-01T23:59:59.000Z

256

Development of Design Criteria for Fluid Induced Structural Vibrations in Steam Generators and Heat Exchangers  

SciTech Connect

Flow-induced vibration in heat exchangers has been a major cause of concern in the nuclear industry for several decades. Many incidents of failure of heat exchangers due to apparent flow-induced vibration have been reported through the USNRC incident reporting system. Almost all heat exchangers have to deal with this problem during their operation. The phenomenon has been studied since the 1970s and the database of experimental studies on flow-induced vibration is constantly updated with new findings and improved design criteria for heat exchangers.

Uvan Catton; Vijay K. Dhir; Deepanjan Mitra; Omar Alquaddoomi; Pierangelo Adinolfi

2004-04-06T23:59:59.000Z

257

HIERARCHICAL METHODOLOGY FOR MODELING HYDROGEN STORAGE SYSTEMS PART II: DETAILED MODELS  

DOE Green Energy (OSTI)

There is significant interest in hydrogen storage systems that employ a media which either adsorbs, absorbs or reacts with hydrogen in a nearly reversible manner. In any media based storage system the rate of hydrogen uptake and the system capacity is governed by a number of complex, coupled physical processes. To design and evaluate such storage systems, a comprehensive methodology was developed, consisting of a hierarchical sequence of models that range from scoping calculations to numerical models that couple reaction kinetics with heat and mass transfer for both the hydrogen charging and discharging phases. The scoping models were presented in Part I [1] of this two part series of papers. This paper describes a detailed numerical model that integrates the phenomena occurring when hydrogen is charged and discharged. A specific application of the methodology is made to a system using NaAlH{sub 4} as the storage media.

Hardy, B; Donald L. Anton, D

2008-12-22T23:59:59.000Z

258

Design and Development of Intricate Nanomedical Devices through Compositional, Dimensional and Structural Control  

E-Print Network (OSTI)

Nanomedicine, the medical application of nanotechnology, uses nanoscale objects that exist at the interface between small molecule and the macroscopic world for medical diagnosis and treatment. One of the healthcare applications of nanomedicine is drug delivery: the development of nanoscale objects to improve therapeutics' bioavailability and pharmacokinetics. Shell crosslinked knedel-like nanoparticles (SCKs), that are self assembled from amphiphilic block copolymers into polymeric micelles and then further stabilized with crosslinkers isolated throughout the peripheral shell layer, have been investigated for drug delivery applications that take advantage of their core-shell morphology and tunable surface chemistry. SCKs are attractive nanocarriers because the cores of the SCKs are used for sequestering and protecting guests. The readily adjustable shell crosslinking density allows for gating of the guest transport into and out of the core domain, while retaining the structural integrity of the SCKs. Moreover, the highly functionalizable shell surface provides opportunity for incorporation of targeting ligands for enhanced therapeutic delivery. The optimization of nanoparticle size, surface chemistry, composition, structure, and morphology has been pursued towards maximization of the SCKs' therapeutic efficacy. With distinctively different dimensions, compositions and structures of the core and shell domains of SCKs, and an ability to modify each independently, probing the effects of each is one of the major foci of this dissertation. Utilization of a living radical polymerization technique, reversible addition-fragmentation chain transfer (RAFT) polymerization, has allowed for facile manipulation of the block lengths of the polymer precursors and thus resulted in various dimensions of the nanoparticles. SCKs constructed from poly(acrylic acid)-b-polystyrene (PAA-b-PS) with various chain lengths, have been investigated on the loading and release of doxorubicin (DOX). The effect of PEGylation on paclitaxel (PTX) loaded SCKs on the cell internalization and killing was investigated. Apart from chemotherapies, the SCKs were explored as antimicrobial agents by incorporating silver species. Conjugation of the SCK surface with a protein adhesin through amidation chemistry to promote epithelial cell targeting and internalization was developed. Nanoscale assemblies with complex morphologies constructed from a linear triblock copolymer was investigated. Furthermore, a highly multifunctional nanodevice for imaging and drug delivery functionalized with a chelator for radio-labeling, polyethylene glycol (PEG) for improved biodistribution, targeting ligands, a chromophore and a therapeutic agent was evaluated in vivo as active-targeted delivery of therapeutics.

Lin, Yun

2012-05-01T23:59:59.000Z

259

Development of Design Criteria for Fluid Induced Structural Vibration in Steam Generators and Heat Exchangers  

SciTech Connect

OAK-B135 Flow-induced vibration in heat exchangers has been a major cause of concern in the nuclear industry for several decades. Many incidents of failure of heat exchangers due to apparent flow-induced vibration have been reported through the USNRC incident reporting system. Almost all heat exchangers have to deal with this problem during their operation. The phenomenon has been studied since the 1970s and the database of experimental studies on flow-induced vibration is constantly updated with new findings and improved design criteria for heat exchangers. In the nuclear industry, steam generators are often affected by this problem. However, flow-induced vibration is not limited to nuclear power plants, but to any type of heat exchanger used in many industrial applications such as chemical processing, refrigeration and air conditioning. Specifically, shell and tube type heat exchangers experience flow-induced vibration due to the high velocity flow over the tube banks. Flow-induced vibration in these heat exchangers leads to equipment breakdown and hence expensive repair and process shutdown. The goal of this research is to provide accurate measurements that can help modelers to validate their models using the measured experimental parameters and thereby develop better design criteria for avoiding fluid-elastic instability in heat exchangers. The research is divided between two primary experimental efforts, the first conducted using water alone (single phase) and the second using a mixture of air or steam and water as the working fluid (two phase). The outline of this report is as follows: After the introduction to fluid-elastic instability, the experimental apparatus constructed to conduct the experiments is described in Chapter 2 along with the measurement procedures. Chapter 3 presents results obtained on the tube array and the flow loop, as well as techniques used in data processing. The project performance is described and evaluated in Chapter 4 followed by a discussion of publications and presentations relevant to the project in Chapter 5, while the conclusions and recommendations for future work are presented in Chapter 6.

Catton, Ivan; Dhir, Vijay K.; Alquaddoomi, O.S.; Mitra, Deepanjan; Adinolfi, Pierangelo

2004-03-26T23:59:59.000Z

260

Thermal-Structural Design of a Water Shield For Surface Reactor Missions  

SciTech Connect

Water shielding is an attractive option for an affordable lunar surface fission reactor program. The attractiveness of the water shielding option arises from the relative ease of proto-typing and ground testing, the relatively low development effort needed, as well as the fabrication and operating experience with stainless steel and water. The most significant limitation in using a water shield is temperature: to prevent the formation of voids and the consequent loss of cooling, the water temperature has to be maintained below the saturation temperature corresponding to the shield pressure. This paper examines natural convection for a prototypic water shield design using the computational fluid dynamics (CFD) code CFX-5 as well as analytical modeling. The results show that natural convection is adequate to keep the water well-mixed. The results also show that for the above-ground configuration, shield surface and water temperatures during lunar day conditions are high enough to require shield pressures up to 2.5 atm to prevent void formation. For the buried configuration, a set of ammonia heat pipes attached to the shield outer wall can be used to maintain water temperatures within acceptable limits. Overall the results show that water shielding is feasible for lunar surface applications. The results of the CFD analyses can also be used to guide development of testing plans for shield thermal testing. (authors)

Sadasivan, Pratap; Kapernick, Richard J.; Poston, David I. [D-5 Nuclear Systems Design Group MS K575, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545 (United States)

2006-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "hierarchical structure designed" 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

Follow medical processes in the human body, study safe hydro-gen storage in complex metal structures for car design, follow  

E-Print Network (OSTI)

Follow medical processes in the human body, study safe hydro- gen storage in complex metal structures for car design, follow the phase transition of foodstuff to improve their taste, detect plastic

262

Modeling the flexibility of alpha helices in protein interfaces : structure based design and prediction of helix-mediated protein-protein interactions  

E-Print Network (OSTI)

Protein-protein interactions play an essential role in many biological functions. Prediction and design of these interactions using computational methods requires models that can be used to efficiently sample structural ...

Apgar, James R. (James Reasoner)

2008-01-01T23:59:59.000Z

263

MHK Cost Breakdown Structure Draft | OpenEI Community  

Open Energy Info (EERE)

MHK Cost Breakdown Structure Draft MHK Cost Breakdown Structure Draft Home > Groups > Water Power Forum Kch's picture Submitted by Kch(24) Member 9 April, 2013 - 13:30 CBS current energy GMREC LCOE levelized cost of energy marine energy MHK ocean energy The generalized Cost Breakdown Structure (CBS) for marine and hydrokinetic (MHK) projects is a hierarchical structure designed to facilitate the collection and organization of lifecycle costs of any type of MHK project, including wave energy converters and current energy convertners. At a high level, the categories in the CBS will be applicable to all projects; at a detailed level, however, the CBS includes many cost categories that will pertain to one project but not others. It is expected that many of the detailed levels of the CBS will be populated with "NA" or left blank.

264

Javascript Design  

Science Conference Proceedings (OSTI)

From the Publisher:JavaScript Design shows designers how to create interactive JavaScript applications for the Web. It provides detailed descriptions of:JavaScript structures, statements and objectsUsing JavaScript to create different ...

Bill B. Sanders

2001-12-01T23:59:59.000Z

265

Time Synchronization in Hierarchical TESLA Wireless Sensor Networks  

SciTech Connect

Time synchronization and event time correlation are important in wireless sensor networks. In particular, time is used to create a sequence events or time line to answer questions of cause and effect. Time is also used as a basis for determining the freshness of received packets and the validity of cryptographic certificates. This paper presents secure method of time synchronization and event time correlation for TESLA-based hierarchical wireless sensor networks. The method demonstrates that events in a TESLA network can be accurately timestamped by adding only a few pieces of data to the existing protocol.

Jason L. Wright; Milos Manic

2009-08-01T23:59:59.000Z

266

A Hierarchical Security Architecture for Cyber-Physical Systems  

SciTech Connect

Security of control systems is becoming a pivotal concern in critical national infrastructures such as the power grid and nuclear plants. In this paper, we adopt a hierarchical viewpoint to these security issues, addressing security concerns at each level and emphasizing a holistic cross-layer philosophy for developing security solutions. We propose a bottom-up framework that establishes a model from the physical and control levels to the supervisory level, incorporating concerns from network and communication levels. We show that the game-theoretical approach can yield cross-layer security strategy solutions to the cyber-physical systems.

Quanyan Zhu; Tamer Basar

2011-08-01T23:59:59.000Z

267

Hierarchical Marginal Land Assessment for Land Use Planning  

SciTech Connect

Marginal land provides an alternative potential for food and bioenergy production in the face of limited land resources; however, effective assessment of marginal lands is not well addressed. Concerns over environmental risks, ecosystem services and sustainability for marginal land have been widely raised. The objective of this study was to develop a hierarchical marginal land assessment framework for land use planning and management. We first identified major land functions linking production, environment, ecosystem services and economics, and then classified land resources into four categories of marginal land using suitability and limitations associated with major management goals, including physically marginal land, biologically marginal land, environmental-ecological marginal land, and economically marginal land. We tested this assessment framework in south-western Michigan, USA. Our results indicated that this marginal land assessment framework can be potentially feasible on land use planning for food and bioenergy production, and balancing multiple goals of land use management. We also compared our results with marginal land assessment from the Conservation Reserve Program (CRP) and land capability classes (LCC) that are used in the US. The hierarchical assessment framework has advantages of quantitatively reflecting land functions and multiple concerns. This provides a foundation upon which focused studies can be identified in order to improve the assessment framework by quantifying high-resolution land functions associated with environment and ecosystem services as well as their criteria are needed to improve the assessment framework.

Kang, Shujiang [ORNL; Post, Wilfred M [ORNL; Wang, Dali [ORNL; Nichols, Dr Jeff A [ORNL; Bandaru, Vara Prasad [ORNL

2013-01-01T23:59:59.000Z

268

Point-wise hierarchical reconstruction for discontinuous Galerkin and finite volume methods for solving conservation laws  

Science Conference Proceedings (OSTI)

We develop a new hierarchical reconstruction (HR) method [17,28] for limiting solutions of the discontinuous Galerkin and finite volume methods up to fourth order of accuracy without local characteristic decomposition for solving hyperbolic nonlinear ... Keywords: Discontinous Galerkin method, Finite volume method, Hierarchical reconstruction, Hyperbolic conservation laws, Limiter

Zhiliang Xu; Yingjie Liu; Huijing Du; Guang Lin; Chi-Wang Shu

2011-07-01T23:59:59.000Z

269

2005 Special Issue: A hierarchical classifier using new support vector machines for automatic target recognition  

Science Conference Proceedings (OSTI)

A binary hierarchical classifier is proposed for automatic target recognition. We also require rejection of non-object (non-target) inputs, which are not seen during training or validation, thus producing a very difficult problem. The SVRDM (support ... Keywords: Automatic target recognition, Hierarchical classifier, Support vector machine

David Casasent; Yu-Chiang Wang

2005-06-01T23:59:59.000Z

270

A performance comparison of mobility anchor point selection schemes in Hierarchical Mobile IPv6 networks  

Science Conference Proceedings (OSTI)

Hierarchical Mobile IPv6 (HMIPv6) introduces a mobility anchor point (MAP) that localizes the signaling traffic and hence reduces the handoff latency. In addition to processing binding update messages from mobile nodes (MNs) on behalf of MNs' home agents ... Keywords: Analytical modeling, Hierarchical Mobile IPv6, Load balancing, MAP selection scheme, Mobility anchor point (MAP)

Sangheon Pack; Taekyoung Kwon; Yanghee Choi

2007-04-01T23:59:59.000Z

271

Hierarchical Multi-Dimensional Table Lookup for Model Compiler Based Circuit Simulation  

Science Conference Proceedings (OSTI)

In this paper, a systematic method for automatically generating hierarchical multi-dimensional table lookup models for compact device and behavioral models with any number of terminals is presented. The method is based on an Abstract Syntax Tree representation ... Keywords: Model Compiler, Abstract-Syntax-Tree, Hierarchical Multi-dimensional Table Lookup, Optimization, Circuit Simulation

Bo Wan; C.-J. Richard Shi

2004-02-01T23:59:59.000Z

272

A hierarchical fracture model for the iterative multiscale finite volume method  

Science Conference Proceedings (OSTI)

An iterative multiscale finite volume (i-MSFV) method is devised for the simulation of multiphase flow in fractured porous media in the context of a hierarchical fracture modeling framework. Motivated by the small pressure change inside highly conductive ... Keywords: Fractured porous media, Hierarchical fractured modeling, Iterative multiscale finite volume, Iterative multiscale methods, Multiscale finite volume, Multiscale fracture modeling, Multiscale methods

Hadi Hajibeygi; Dimitris Karvounis; Patrick Jenny

2011-10-01T23:59:59.000Z

273

Structuring public place through the design of access systems : the design of urban public place, an addition to the "New Market" of Calcutta, India  

E-Print Network (OSTI)

The addition and re-design of a 19th century covered market in the heart of Calcutta, India, is the design project to explore the larger topic of place-making within a specific culture. In Calcutta the divisions of society ...

Ahmad Aminuddin

1995-01-01T23:59:59.000Z

274

Development of a hierarchical fuzzy model for the evaluation of inherent safety  

E-Print Network (OSTI)

Inherent safety has been recognized as a design approach useful to remove or reduce hazards at the source instead of controlling them with add-on protective barriers. However, inherent safety is based on qualitative principles that cannot easily be evaluated and analyzed, and this is one of the major difficulties for the systematic application and quantification of inherent safety in plant design. The present research introduces the use of fuzzy logic for the measurement of inherent safety by proposing a hierarchical fuzzy model. This dissertation establishes a novel conceptual framework for the analysis of inherent safety and proposes a methodology that addresses several of the limitations of the methodologies available for current inherent safety analysis. This research proposes a methodology based on a hierarchical fuzzy model that analyzes the interaction of variables relevant for inherent safety and process safety in general. The use of fuzzy logic is helpful for modeling uncertainty and subjectivities implied in evaluation of certain variables and it is helpful for combining quantitative data with qualitative information. Fuzzy logic offers the advantage of being able to model numerical and heuristic expert knowledge by using fuzzy IF-THEN rules. Safety is traditionally considered a subjective issue because of the high uncertainty associated with its significant descriptors and parameters; however, this research recognizes that rather than subjective, "safety" is a vague problem. Vagueness derives from the fact that it is not possible to define sharp boundaries between safe and unsafe states; therefore the problem is a "matter of degree". The proposed method is computer-based and process simulator-oriented in order to reduce the time and expertise required for the analysis. It is expected that in the future, by linking the present approach to a process simulator, process engineers can develop safety analysis during the early stages of the design in a rapid and systematic way. Another important aspect of inherent safety, rarely addressed, is transportation of chemical substances; this dissertation includes the analysis of transportation hazard by truck using a fuzzy logic-based approach.

Gentile, Michela

2004-08-01T23:59:59.000Z

275

SAM—a computer aided design tool for specifying and analyzing modular, heirarchical systems  

Science Conference Proceedings (OSTI)

This paper presents SAM, a computer aided design tool for specifying and analyzing modular, hierarchical systems. SAM is based on Discrete Event System Specification (DEVS) and it uses generic components for specifying coupling relationships among components. ...

Arturo I. Concepcion; Stephen J. Schon

1986-12-01T23:59:59.000Z

276

Design of Sandwich Structures  

E-Print Network (OSTI)

;L and R#16;t #25; #22;#16; #5; #5; #5; #5; #5; #22;#16; #22;#5;#23; Layup details #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #5; #22;#23; #22;#5;#3; Test setup #5; #5...

Petras, Achilles

277

Structural Design Philosophies  

Science Conference Proceedings (OSTI)

Table 1   Historic failures and their impact on life assessment concerns...of fracture mechanics Liquefied natural gas (LNG) storage tank ( Ref 9 ) 1944 Failure and explosion of an LNG pressure vessel

278

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

279

The Star Formation History in a Hierarchical Universe  

E-Print Network (OSTI)

Observations now probe the star formation history of the Universe back to a redshift of $z\\sim5$. We investigate whether the predictions of semi-analytic models of galaxy formation based on hierarchical Cold Dark Matter (CDM) type models are in agreement with these direct observations and also with the ``fossil'' evidence contained in constraints on the ages of present day early-type galaxies. Previous models predicted that the star formation rate density falls off rather steeply at $z\\ga 2$, and correspondingly that the majority of the stars in the Universe formed at relatively low redshift. We investigate the effect of including a bursting mode of star formation, assuming that galaxy-galaxy mergers trigger starbursts and using the merger rate that arises naturally in the CDM merging hierarchy. The resulting starbursts substantially increase the global star formation rate at high redshift, leading to predictions that are in good agreement with the star formation rate density at $z\\sim3$ obtained from sub-millimeter observations (SCUBA) and optical/UV estimates after correction for dust extinction. The mass of stars formed at $z \\ge 3$ is correspondingly in better agreement with the fossil evidence. We also investigate complementary global quantities such as the mass of cold gas and the average metallicity of cold gas as a function of redshift, and the integrated extra-galactic background light. We argue that these observations, taken together, provide strong constraints on the star formation history of the Universe, and that hierarchical models of the CDM type are in reasonable agreement with these observations when starbursts are included.

Rachel S. Somerville; Joel R. Primack

1998-10-31T23:59:59.000Z

280

MODELING THE RED SEQUENCE: HIERARCHICAL GROWTH YET SLOW LUMINOSITY EVOLUTION  

SciTech Connect

We explore the effects of mergers on the evolution of massive early-type galaxies by modeling the evolution of their stellar populations in a hierarchical context. We investigate how a realistic red sequence population set up by z {approx} 1 evolves under different assumptions for the merger and star formation histories, comparing changes in color, luminosity, and mass. The purely passive fading of existing red sequence galaxies, with no further mergers or star formation, results in dramatic changes at the bright end of the luminosity function and color-magnitude relation. Without mergers there is too much evolution in luminosity at a fixed space density compared to observations. The change in color and magnitude at a fixed mass resembles that of a passively evolving population that formed relatively recently, at z {approx} 2. Mergers among the red sequence population ('dry mergers') occurring after z = 1 build up mass, counteracting the fading of the existing stellar populations to give smaller changes in both color and luminosity for massive galaxies. By allowing some galaxies to migrate from the blue cloud onto the red sequence after z = 1 through gas-rich mergers, younger stellar populations are added to the red sequence. This manifestation of the progenitor bias increases the scatter in age and results in even smaller changes in color and luminosity between z = 1 and z = 0 at a fixed mass. The resultant evolution appears much slower, resembling the passive evolution of a population that formed at high redshift (z {approx} 3-5), and is in closer agreement with observations. We conclude that measurements of the luminosity and color evolution alone are not sufficient to distinguish between the purely passive evolution of an old population and cosmologically motivated hierarchical growth, although these scenarios have very different implications for the mass growth of early-type galaxies over the last half of cosmic history.

Skelton, Rosalind E. [Department of Astronomy, Yale University, 260 Whitney Avenue, New Haven, CT 06511 (United States); Bell, Eric F. [Department of Astronomy, University of Michigan, 500 Church Street, Ann Arbor, MI 48109-1042 (United States); Somerville, Rachel S., E-mail: ros.skelton@yale.edu [Department of Physics and Astronomy, Rutgers, State University of New Jersey, 136 Frelinghuysen Road, Piscataway, NJ 08854 (United States)

2012-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "hierarchical structure designed" 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

Aging through hierarchical coalescence in the East model  

E-Print Network (OSTI)

We rigorously analyze the low temperature non-equilibrium dynamics of the East model, a special example of a one dimensional oriented kinetically constrained particle model, when the initial distribution is different from the reversible one and for times much smaller than the global relaxation time. This setting has been intensively studied in the physics literature to analyze the slow dynamics which follows a sudden quench from the liquid to the glass phase. In the limit of zero temperature (i.e. a vanishing density of vacancies) and for initial distributions such that the vacancies form a renewal process we prove that the density of vacancies, the persistence function and the two-time autocorrelation function behave as staircase functions with several plateaux. Furthermore the two-time autocorrelation function displays an aging behavior. We also provide a sharp description of the statistics of the domain length as a function of time, a domain being the interval between two consecutive vacancies. When the initial renewal process has finite mean our results confirm (and generalize) previous findings of the physicists for the restricted case of a product Bernoulli measure. However we show that a different behavior appears when the initial domain distribution is in the attraction domain of a $\\alpha$-stable law. All the above results actually follow from a more general result which says that the low temperature dynamics of the East model is very well described by that of a certain hierarchical coalescence process, a probabilistic object which can be viewed as a hierarchical sequence of suitably linked coalescence processes and whose asymptotic behavior has been recently studied in [14].

A. Faggionato; F. Martinelli; C. Roberto; C. Toninelli

2010-12-22T23:59:59.000Z

282

Bayesian Hierarchical Model for Combining Two-resolution Metrology Data  

E-Print Network (OSTI)

This dissertation presents a Bayesian hierarchical model to combine two-resolution metrology data for inspecting the geometric quality of manufactured parts. The high- resolution data points are scarce, and thus scatter over the surface being measured, while the low-resolution data are pervasive, but less accurate or less precise. Combining the two datasets could supposedly make a better prediction of the geometric surface of a manufactured part than using a single dataset. One challenge in combining the metrology datasets is the misalignment which exists between the low- and high-resolution data points. This dissertation attempts to provide a Bayesian hierarchical model that can handle such misaligned datasets, and includes the following components: (a) a Gaussian process for modeling metrology data at the low-resolution level; (b) a heuristic matching and alignment method that produces a pool of candidate matches and transformations between the two datasets; (c) a linkage model, conditioned on a given match and its associated transformation, that connects a high-resolution data point to a set of low-resolution data points in its neighborhood and makes a combined prediction; and finally (d) Bayesian model averaging of the predictive models in (c) over the pool of candidate matches found in (b). This Bayesian model averaging procedure assigns weights to different matches according to how much they support the observed data, and then produces the final combined prediction of the surface based on the data of both resolutions. The proposed method improves upon the methods of using a single dataset as well as a combined prediction without addressing the misalignment problem. This dissertation demonstrates the improvements over alternative methods using both simulated data and the datasets from a milled sine-wave part, measured by two coordinate measuring machines of different resolutions, respectively.

Xia, Haifeng

2008-12-01T23:59:59.000Z

283

THE EVOLUTION OF BRIGHTEST CLUSTER GALAXIES IN A HIERARCHICAL UNIVERSE  

Science Conference Proceedings (OSTI)

We investigate the evolution of brightest cluster galaxies (BCGs) from redshift z {approx} 1.6 to z = 0. We upgrade the hierarchical semi-analytic model of Croton et al. with a new spectro-photometric model that produces realistic galaxy spectra, making use of the Maraston stellar populations and a new recipe for the dust extinction. We compare the model predictions of the K-band luminosity evolution and the J - K, V - I, and I - K color evolution with a series of data sets, including those of Collins et al. who argued that semi-analytic models based on the Millennium simulation cannot reproduce the red colors and high luminosity of BCGs at z > 1. We show instead that the model is well in range of the observed luminosity and correctly reproduces the color evolution of BCGs in the whole redshift range up to z {approx} 1.6. We argue that the success of the semi-analytic model is in large part due to the implementation of a more sophisticated spectro-photometric model. An analysis of the model BCGs shows an increase in mass by a factor of 2-3 since z {approx} 1, and star formation activity down to low redshifts. While the consensus regarding BCGs is that they are passively evolving, we argue that this conclusion is affected by the degeneracy between star formation history and stellar population models used in spectral energy distribution fitting, and by the inefficacy of toy models of passive evolution to capture the complexity of real galaxies, especially those with rich merger histories like BCGs. Following this argument, we also show that in the semi-analytic model the BCGs show a realistic mix of stellar populations, and that these stellar populations are mostly old. In addition, the age-redshift relation of the model BCGs follows that of the universe, meaning that given their merger history and star formation history, the ageing of BCGs is always dominated by the ageing of their stellar populations. In a {Lambda}CDM universe, we define such evolution as 'passive in the hierarchical sense'.

Tonini, Chiara; Bernyk, Maksym; Croton, Darren [Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Melbourne, VIC 3122 (Australia); Maraston, Claudia; Thomas, Daniel [Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth PO1 3FX (United Kingdom)

2012-11-01T23:59:59.000Z

284

Hierarchical Bayesian Detection Algorithm for Early-Universe Relics in the Cosmic Microwave Background  

E-Print Network (OSTI)

A number of theoretically well-motivated additions to the standard cosmological model predict weak signatures in the form of spatially localized sources embedded in the cosmic microwave background (CMB) fluctuations. We present a hierarchical Bayesian statistical formalism and a complete data analysis pipeline for testing such scenarios. We derive an accurate approximation to the full posterior probability distribution over the parameters defining any theory that predicts sources embedded in the CMB, and perform an extensive set of tests in order to establish its validity. The approximation is implemented using a modular algorithm, designed to avoid a posteriori selection effects, which combines a candidate-detection stage with a full Bayesian model-selection and parameter-estimation analysis. We apply this pipeline to theories that predict cosmic textures and bubble collisions, extending previous analyses by using: (1) adaptive-resolution techniques, allowing us to probe features of arbitrary size, and (2) optimal filters, which provide the best possible sensitivity for detecting candidate signatures. We conclude that the WMAP 7-year data do not favor the addition of either cosmic textures or bubble collisions to the standard cosmological model, and place robust constraints on the predicted number of such sources. The expected numbers of bubble collisions and cosmic textures on the CMB sky within our detection thresholds are constrained to be fewer than 4.0 and 5.2 at 95% confidence, respectively.

Stephen M. Feeney; Matthew C. Johnson; Jason D. McEwen; Daniel J. Mortlock; Hiranya V. Peiris

2012-10-09T23:59:59.000Z

285

Seismic design of a current woodframe structure and study of innovative products and damping systems in wood construction  

E-Print Network (OSTI)

Wood structures have seen resurgence in popularity over the past several decades, especially in Western States of America, such as California. The industry keeps creating new structural wood products of exceptional strength, ...

Mahjoub, Nina A. (Nina Azadeh)

2007-01-01T23:59:59.000Z

286

Formal verification of hierarchically distributed agent based protection scheme in smart grid  

Science Conference Proceedings (OSTI)

In recent studies, hierarchically distributed non-intrusive agent aided transmission line distance relaying protection scheme has been proposed. This scheme is meant to provide the distance relays with situational awareness and improve their robustness ...

Shravan Garlapati; Sandeep K. Shukla

2012-07-01T23:59:59.000Z

287

A Tree-Ring-Based Reconstruction of Delaware River Basin Streamflow Using Hierarchical Bayesian Regression  

Science Conference Proceedings (OSTI)

A hierarchical Bayesian regression model is presented for reconstructing the average summer streamflow at five gauges in the Delaware River basin using eight regional tree-ring chronologies. The model provides estimates of the posterior ...

Naresh Devineni; Upmanu Lall; Neil Pederson; Edward Cook

2013-06-01T23:59:59.000Z

288

Improving the dynamic hierarchical compact clustering algorithm by using feature selection  

Science Conference Proceedings (OSTI)

Feature selection has improved the performance of text clustering. In this paper, a local feature selection technique is incorporated in the dynamic hierarchical compact clustering algorithm to speed up the computation of similarities. We also present ...

Reynaldo Gil-García; Aurora Pons-Porrata

2010-11-01T23:59:59.000Z

289

Unsupervised Activity Perception in Crowded and Complicated Scenes Using Hierarchical Bayesian Models  

E-Print Network (OSTI)

We propose a novel unsupervised learning framework to model activities and interactions in crowded and complicated scenes. Hierarchical Bayesian models are used to connect three elements in visual surveillance: low-level ...

Wang, Xiaogang

290

2006 Special issue Perceiving the unusual: Temporal properties of hierarchical motor  

E-Print Network (OSTI)

2006 Special issue Perceiving the unusual: Temporal properties of hierarchical motor of demonstrated actions to the observer robot's equivalent motor representations (Alissandrakis, Nehaniv visual information and retrieving motor representations, differ in the way that the perceptual

Demiris, Yiannis

291

Analog performance space exploration by Fourier-Motzkin elimination with application to hierarchical sizing  

Science Conference Proceedings (OSTI)

Analog performance space exploration identifies the range of feasible performance values of a given circuit topology. It is an extremely challenging task of great importance to topology selection and hierarchical sizing. In this paper, a novel technique ...

G. Stehr; H. Graeb; K. Antreich

2004-11-01T23:59:59.000Z

292

The smooth cut-off Hierarchical Reference Theory of fluids  

E-Print Network (OSTI)

We provide a comprehensive presentation of the Hierarchical Reference Theory (HRT) in the smooth cut-off formulation. A simple and self-consistent derivation of the hierarchy of differential equations is supplemented by a comparison with the known sharp cut-off HRT. Then, the theory is applied to a hard core Yukawa fluid (HCYF): a closure, based on a mean spherical approximation ansatz, is studied in detail and its intriguing relationship to the self consistent Ornstein-Zernike approximation is discussed. The asymptotic properties, close to the critical point are investigated and compared to the renormalization group results both above and below the critical temperature. The HRT free energy is always a convex function of the density, leading to flat isotherms in the two-phase region with a finite compressibility at coexistence. This makes HRT the sole liquid-state theory able to obtain directly fluid-fluid phase equilibrium without resorting to the Maxwell construction. The way the mean field free energy is modified due to the inclusion of density fluctuations suggests how to identify the spinodal curve. Thermodynamic properties and correlation functions of the HCYF are investigated for three values of the inverse Yukawa range: z=1.8, z=4 and z=7 where Monte Carlo simulations are available. The stability of the liquid-vapor critical point with respect to freezing is also studied.

Alberto Parola; Davide Pini; Luciano Reatto

2009-01-14T23:59:59.000Z

293

A novel biomimetic approach to the design of high-performance ceramic/metal composites  

SciTech Connect

The prospect of extending natural biological design to develop new synthetic ceramic-metal composite materials is examined. Using ice-templating of ceramic suspensions and subsequent metal infiltration, we demonstrate that the concept of ordered hierarchical design can be applied to create fine-scale laminated ceramic-metal (bulk) composites that are inexpensive, lightweight and display exceptional damage-tolerance properties. Specifically, Al{sub 2}O{sub 3}/Al-Si laminates with ceramic contents up to approximately 40 vol% and with lamellae thicknesses down to 10 {micro}m were processed and characterized. These structures achieve an excellent fracture toughness of 40 MPa{radical}m at a tensile strength of approximately 300 MPa. Salient toughening mechanisms are described together with further toughening strategies.

Launey, Maximilien E.; Munch, Etienne; Alsem, Daan Hein; Saiz, Eduardo; Tomsia, Antoni P.; Ritchie, Robert O.

2009-08-01T23:59:59.000Z

294

Hierarchical Formation of Galaxies with Dynamical Response to Supernova-Induced Gas removal  

E-Print Network (OSTI)

We reanalyze the formation and evolution of galaxies in the hierarchical clustering scenario. Using a semi-analytic model (SAM) of galaxy formation described in this paper, which we hereafter call the Mitaka model, we extensively investigate the observed scaling relations of galaxies among photometric, kinematic, structural and chemical characteristics. In such a scenario, spheroidal galaxies are assumed to be formed by major merger and subsequent starburst, in contrast to the traditional scenario of monolithic cloud collapse. As a new ingredient of SAMs, we introduce the effects of dynamical response to supernova-induced gas removal on size and velocity dispersion, which play an important role on dwarf galaxy formation. In previous theoretical studies of dwarf galaxies based on the monolithic cloud collapse given by Yoshii & Arimoto and Dekel & Silk, the dynamical response was treated in the extremes of a purely baryonic cloud and a baryonic cloud fully supported by surrounding dark matter. To improve this simple treatment, in our previous paper, we formulated the dynamical response in more realistic, intermediate situations between the above extremes. While the effects of dynamical response depend on the mass fraction of removed gas from a galaxy, how much amount of the gas remains just after major merger depends on the star formation history. A variety of star formation histories are generated through the Monte Carlo realization of merging histories of dark halos, and it is found that our SAM naturally makes a wide variety of dwarf galaxies and their dispersed characteristics as observed. (Abridged)

Masahiro Nagashima; Yuzuru Yoshii

2004-04-25T23:59:59.000Z

295

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

296

Ward-Rainey N. Proposal for a new hierarchic classification system, Actinobacteria classis nov  

E-Print Network (OSTI)

A new hierarchic classification structure for the taxa between the taxonomic levels of genus and class is proposed for the actinomycete line of descent as defined by analysis of small subunit (16s) rRNA and genes coding for this molecule (rDNA). While the traditional circumscription of a genus of the actinomycete subphylum is by and large in accord with the 16s rRNA/rDNA-based phylogenetic clustering of these organisms, most of the higher taxa proposed in the past do not take into account the phylogenetic clustering of genera. The rich chemical, morphological and physiological diversity of phylogenetically closely related genera makes the description of families and higher taxa so broad that they become meaningless for the description of the enclosed taxa. Here we present a classification system in which phylogenetically neighboring taxa at the genus level are clustered into families, suborders, orders, subclasses, and a class irrespective of those phenotypic characteristics on which the delineation of taxa has been based in the past. Rather than being based on a listing of a wide array of chemotaxonomic, morphological, and physiological properties, the delineation is based solely on 16s rDNA/rRNA sequence-based phylogenetic clustering and the presence of taxon-specific 16s rDNA/RNA signature nucleotides. In their publication “On the nature of global classification,” Wheelis et al. (177) based the definition of higher taxa on the

Erko Stackebrandt; Fred A. Rainey; Naomi; L. Ward-rainey

1997-01-01T23:59:59.000Z

297

Design optimization methodology for power converters based on global energy requirement criteria. Application to a DC-DC flyback structure  

E-Print Network (OSTI)

produce direct current, and most existing electric loads could be powered with direct currents [4», « Life Cycle Analysis (LCA)», «Device modeling». Abstract This paper discusses a design methodology consumption profile. Introduction Nowadays, converters are currently designed to present the best cost and

Paris-Sud XI, Université de

298

Structure  

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

Structure Structure functions 1 NOTE: THE FIGURES IN THIS SECTION ARE INTENDED TO SHOW THE REPRESENTATIVE DATA. THEY ARE NOT MEANT TO BE COMPLETE COMPILATIONS OF ALL THE WORLD'S RELIABLE DATA. Q 2 (GeV 2 ) F 2 (x,Q 2 ) * 2 i x H1 ZEUS BCDMS E665 NMC SLAC 10 -3 10 -2 10 -1 1 10 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 10 -1 1 10 10 2 10 3 10 4 10 5 10 6 Figure 16.6: The proton structure function F p 2 measured in electromagnetic scattering of positrons on protons (collider experiments ZEUS and H1), in the kinematic domain of the HERA data, for x > 0.00006 (cf. Fig. 16.9 for data at smaller x and Q 2 ), and for electrons (SLAC) and muons (BCDMS, E665, NMC) on a fixed target. Statistical and systematic errors added in quadrature are shown. The data are plotted as a function of Q 2 in bins of fixed x. Some points have been slightly offset in Q 2 for clarity. The ZEUS binning in x is used in this plot; all other data are rebinned to the x values of

299

Building a foundation for structure-based cellulosome design for cellulosic ethanol: Insight into cohesin-dockerin complexation from computer simulation  

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

Foundation for Structure-Based Cellulosome Design for Foundation for Structure-Based Cellulosome Design for Cellulosic Ethanol: Insight into Cohesin-Dockerin Complexation from Computer Simulation Jiancong Xu, 1,3 Michael Crowley, 2,3 and Jeremy C. Smith 1,3 1 Center for Molecular Biophysics, Building 6011, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA. 2 Chemical and Biosciences Center, National Renewable Energy Laboratory, 1617 Cole Blvd, Golden, CO, 80401-3393, USA 3 BioEnergy Science Center Corresponding author. Jiancong Xu, Building 6011, MS6309, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37830, USA; E-mail: xuj1@ornl.gov; Phone: 865-241-9111; Fax: 865-576-7651. Running title. Computer simulation of cohesin-dockerin complexes. Manuscript pages: 29 Supplementary material pages: 4

300

Performance-centering optimization for system-level analog design exploration  

Science Conference Proceedings (OSTI)

In this paper we propose a novel analog design optimization methodology to address two key aspects of top-down system-level design: (1) how to optimally compare and select analog system architectures in the early phases of design; and (2) how to hierarchically ...

Xin Li; Jian Wang; L. T. Pileggi; Tun-Shih Chen; Wanju Chiang

2005-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "hierarchical structure designed" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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301

The Multifractal Structure of Contrast Changes in Natural Images: From Sharp Edges to Textures  

Science Conference Proceedings (OSTI)

We present a formalism that leads naturally to a hierarchical description of the different contrast structures in images, providing precise definitions of sharp edges and other texture components. Within this formalism, we achieve a decomposition of ...

Antonio Turiel Ne; Nétor Parga

2000-04-01T23:59:59.000Z

302

New organizational designs for promoting creativity: A case study of virtual teams with anonymity and structured interactions  

Science Conference Proceedings (OSTI)

Companies organize teams to enhance creativity and innovation. Creativity refers to the generation of new and novel ideas, whereas innovation encompasses both idea generation and the commercialization of these ideas to add value to the enterprises. Standard ... Keywords: Creativity, Delphi brainstorming process, O31, VTASI teams, Virtual organizational design

C. M. Chang

2011-10-01T23:59:59.000Z

303

Designing an intelligent decision support system for human-centered utility management automation part 1: structures, problem formulation, solution methodology  

Science Conference Proceedings (OSTI)

This paper presents a Decision Support System (DSS) to aid the electric utility management automation system. A brief history of DSS application in power systems is presented. The importance and role of DSS and decision making in utility management automation ... Keywords: computational intelligence, decision making, decision support, human-centered systems, neural networks, power distribution system, state estimation, systems design, utility management automation

Alireza Fereidunian; Caro Lucas; Hamid Lesani; Mansooreh Zangiabadi

2005-03-01T23:59:59.000Z

304

Design and formation mechanism of self-organized core/shell structure composite powder in immiscible liquid system  

Science Conference Proceedings (OSTI)

Under the guidance of the calculation of phase diagrams method, the self-organized Cu alloy/stainless steel composite powders with a core/shell microstructure were developed based on the gas atomization process, and the formation evolution of self-organized core/shell structure composite powders was modeled by the phase field method. This paper gives a more detailed explanation for the formation of self-organized core/shell structure composite powders from the viewpoints of thermodynamics and kinetics. Such core/shell structure composite powders have good combination of high strength and corrosion resistance (Fe-rich phase) and high electric and thermal conductivities (Cu-rich phase) with many potential advanced applications in electronic devices.

Wang Cuiping; Liu Xingjun; Shi Rongpei; Shen Chen; Wang Yunzhi; Ohnuma, Ikuo; Kainuma, Ryosuke; Ishida, Kiyohito [Department of Materials Science and Engineering, Xiamen University, Xiamen 361005 (China); Department of Materials Science and Engineering, Ohio State University, 2041 College Road, Columbus, Ohio 43210 (United States); Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579 (Japan)

2007-10-01T23:59:59.000Z

305

A New Multilevel Method for Electrostatic Problems through Hierarchical Loop Basis  

E-Print Network (OSTI)

We present a new multilevel method for calculating Poisson's equation, which often arises form electrostatic problems, by using hierarchical loop bases. This method, termed hierarchical Loop basis Poisson Solver (hieLPS), extends previous Poisson solver through loop-tree basis to a multilevel mesh. In this method, Poisson's equation is solved by a two-step procedure: First, the electric flux is found by using loop-tree basis based on Helmholtz decomposition of field; Second, the potential distribution is solved rapidly with a fast solution of O(N) complexity. Among the solution procedures, finding the loop part of electric flux is the most critical part and dominates the computational effort. To expedite this part's convergent speed, we propose to use hierarchical loop bases to construct a multilevel system. As a result, the whole solution time has been noticeably reduced. Numerical examples are presented to demonstrate the efficiency of the proposed method.

Z. -H. Ma; W. C. Chew; Y. M. Wu; L. J. Jiang

2013-05-14T23:59:59.000Z

306

Distributed Hierarchical Control of Multi-Area Power Systems with Improved Primary Frequency Regulation  

SciTech Connect

The conventional distributed hierarchical control architecture for multi-area power systems is revisited. In this paper, a new distributed hierarchical control architecture is proposed. In the proposed architecture, pilot generators are selected in each area to be equipped with decentralized robust control as a supplementary to the conventional droop speed control. With the improved primary frequency control, the system frequency can be restored to the nominal value without the help of secondary frequency control, which reduces the burden of the automatic generation control for frequency restoration. Moreover, the low frequency inter-area electromechanical oscillations can also be effectively damped. The effectiveness of the proposed distributed hierarchical control architecture is validated through detailed simulations.

Lian, Jianming; Marinovici, Laurentiu D.; Kalsi, Karanjit; Du, Pengwei; Elizondo, Marcelo A.

2012-12-12T23:59:59.000Z

307

X-ray structure of the ternary MTX·NADPH complex of the anthrax dihydrofolate reductase: A pharmacophore for dual-site inhibitor design  

DOE Green Energy (OSTI)

For reasons of bioterrorism and drug resistance, it is imperative to identify and develop new molecular points of intervention against anthrax. Dihydrofolate reductase (DHFR) is a highly conserved enzyme and an established target in a number of species for a variety of chemotherapeutic programs. Recently, the crystal structure of B. anthracis DHFR (baDHFR) in complex with methotrexate (MTX) was determined and, based on the structure, proposals were made for drug design strategies directed against the substrate binding site. However, little is gleaned about the binding site for NADPH, the cofactor responsible for hydride transfer in the catalytic mechanism. In the present study, X-ray crystallography at 100 K was used to determine the structure of baDHFR in complex with MTX and NADPH. Although the NADPH binding mode is nearly identical to that seen in other DHFR ternary complex structures, the adenine moiety adopts an off-plane tilt of nearly 90 deg. and this orientation is stabilized by hydrogen bonds to functionally conserved Arg residues. A comparison of the binding site, focusing on this region, between baDHFR and the human enzyme is discussed, with an aim at designing species-selective therapeutics. Indeed, the ternary model, refined to 2.3{angstrom} resolution, provides an accurate template for testing the feasibility of identifying dual-site inhibitors, compounds that target both the substrate and cofactor binding site. With the ternary model in hand, using in silico methods, several compounds were identified which could potentially form key bonding contacts in the substrate and cofactor binding sites. Ultimately, two structurally distinct compounds were verified that inhibit baDHFR at low {mu}M concentrations. The apparent K{sub d} for one of these, (2-(3-(2-(hydroxyimino)-2-(pyridine-4-yl)-6,7-dimethylquinoxalin-2-yl)-1-(pyridine-4-yl)ethanone oxime), was measured by fluorescence spectroscopy to be 5.3 {mu}M.

Bennett, Brad C.; Wan, Qun; Ahmad, Md Faiz; Langan, Paul; Dealwis, Chris G.; (Case Western); (LANL)

2009-11-18T23:59:59.000Z

308

Low Power Design Low PowerLow Power  

E-Print Network (OSTI)

, correlations among system state transitions #12;Low Power Design USC/LPCAD Page 11 USCUSC Low PowerLow Power for the requestsIncoming rates for the requests 21,rr 12 ,rr, :, : State transition ratesState transition rates OS and hardware Abstract, hierarchical finite-state machine Each state represents power

Pedram, Massoud

309

A network hierarchical feedback system for Taiwanese universities based on the integration of total quality management and innovation  

Science Conference Proceedings (OSTI)

An increasing number of Taiwanese universities are improving operational performance through innovation and total quality management (TQM). In addition, the National Quality Award (NQA), which is based on TQM, is now used to evaluate quality performance ... Keywords: Decision-making trial and evaluation laboratory (DEMATEL), Fuzzy analytical hierarchical process (FAHP), Fuzzy analytical network process (FANP), Gray relational analysis (GRA), Network hierarchical feedback system (NHFS)

Jui-Kuei Chen; I-Shuo Chen

2012-08-01T23:59:59.000Z

310

Regulatory Safety Issues in the Structural Design Criteria of ASME Section III Subsection NH and for Very High Temperatures for VHTR & GEN IV  

Science Conference Proceedings (OSTI)

The objective of this task is to identify issues relevant to ASME Section III, Subsection NH [1], and related Code Cases that must be resolved for licensing purposes for VHTGRs (Very High Temperature Gas Reactor concepts such as those of PBMR, Areva, and GA); and to identify the material models, design criteria, and analysis methods that need to be added to the ASME Code to cover the unresolved safety issues. Subsection NH was originally developed to provide structural design criteria and limits for elevated-temperature design of Liquid Metal Fast Breeder Reactor (LMFBR) systems and some gas-cooled systems. The U.S. Nuclear Regulatory Commission (NRC) and its Advisory Committee for Reactor Safeguards (ACRS) reviewed the design limits and procedures in the process of reviewing the Clinch River Breeder Reactor (CRBR) for a construction permit in the late 1970s and early 1980s, and identified issues that needed resolution. In the years since then, the NRC and various contractors have evaluated the applicability of the ASME Code and Code Cases to high-temperature reactor designs such as the VHTGRs, and identified issues that need to be resolved to provide a regulatory basis for licensing. This Report describes: (1) NRC and ACRS safety concerns raised during the licensing process of CRBR , (2) how some of these issues are addressed by the current Subsection NH of the ASME Code; and (3) the material models, design criteria, and analysis methods that need to be added to the ASME Code and Code Cases to cover unresolved regulatory issues for very high temperature service.

William J. O’Donnell; Donald S. Griffin

2007-05-07T23:59:59.000Z

311

Equation-based hierarchical optimization of a pipeline ADC  

E-Print Network (OSTI)

In system design, allocation of circuit resources like power and noise budget is a difficult problem. It is difficult to know the optimal distribution of resources because the performance space of each component is not ...

Khanna, Tania

2008-01-01T23:59:59.000Z

312

Computer Aided Multi-scale Design of SiC-Si3N4 Nanoceramic Composites for High-Temperature Structural Applications  

SciTech Connect

It is estimated that by using better and improved high temperature structural materials, the power generation efficiency of the power plants can be increased by 15% resulting in significant cost savings. One such promising material system for future high-temperature structural applications in power plants is Silicon Carbide-Silicon Nitride (SiC-Si{sub 3}N{sub 4}) nanoceramic matrix composites. The described research work focuses on multiscale simulation-based design of these SiC-Si{sub 3}N{sub 4} nanoceramic matrix composites. There were two primary objectives of the research: (1) Development of a multiscale simulation tool and corresponding multiscale analyses of the high-temperature creep and fracture resistance properties of the SiC-Si{sub 3}N{sub 4} nanocomposites at nano-, meso- and continuum length- and timescales; and (2) Development of a simulation-based robust design optimization methodology for application to the multiscale simulations to predict the range of the most suitable phase morphologies for the desired high-temperature properties of the SiC-Si{sub 3}N{sub 4} nanocomposites. The multiscale simulation tool is based on a combination of molecular dynamics (MD), cohesive finite element method (CFEM), and continuum level modeling for characterizing time-dependent material deformation behavior. The material simulation tool is incorporated in a variable fidelity model management based design optimization framework. Material modeling includes development of an experimental verification framework. Using material models based on multiscaling, it was found using molecular simulations that clustering of the SiC particles near Si{sub 3}N{sub 4} grain boundaries leads to significant nanocomposite strengthening and significant rise in fracture resistance. It was found that a control of grain boundary thicknesses by dispersing non-stoichiometric carbide or nitride phases can lead to reduction in strength however significant rise in fracture strength. The temperature dependent strength and microstructural stability was also significantly depended upon the dispersion of new phases at grain boundaries. The material design framework incorporates high temperature creep and mechanical strength data in order to develop a collaborative multiscale framework of morphology optimization. The work also incorporates a computer aided material design dataset development procedure where a systematic dataset on material properties and morphology correlation could be obtained depending upon a material processing scientist's requirements. Two different aspects covered under this requirement are: (1) performing morphology related analyses at the nanoscale and at the microscale to develop a multiscale material design and analyses capability; (2) linking material behavior analyses with the developed design tool to form a set of material design problems that illustrate the range of material design dataset development that could be performed. Overall, a software based methodology to design microstructure of particle based ceramic nanocomposites has been developed. This methodology has been shown to predict changes in phase morphologies required for achieving optimal balance of conflicting properties such as minimal creep strain rate and high fracture strength at high temperatures. The methodology incorporates complex material models including atomistic approaches. The methodology will be useful to design materials for high temperature applications including those of interest to DoE while significantly reducing cost of expensive experiments.

Vikas Tomer; John Renaud

2010-08-31T23:59:59.000Z

313

Conceptual Design Report Cask Loadout Sys and Cask Drop Redesign for the Immersion Pail Support Structure and Operator Interface Platform at 105 K West  

SciTech Connect

This conceptual design report documents the redesign of the IPSS and the OIP in the 105 KW Basin south loadout pit due to a postulated cask drop accident, as part of Project A.5/A.6, Canister Transfer Facility Modifications. Project A.5/A.6 involves facility modifications needed to transfer fuel from the basin into the cask-MCO. The function of the IPSS is to suspend, guide, and position the immersion pail. The immersion pail protects the cask-MCO from contamination by basin water and acts as a lifting device for the cask-MCO. The OIP provides operator access to the south loadout pit. Previous analyses studied the effects of a cask-MCO drop on the south loadout pit concrete structure and on the IPSS. The most recent analysis considered the resulting loads at the pit slab/wall joint (Kanjilal, 1999). This area had not been modeled previously, and the analysis results indicate that the demand capacity exceeds the allowable at the slab/wall joint. The energy induced on the south loadout pit must be limited such that the safety class function of the basin is maintained. The solution presented in this CDR redesigns the IPSS and the OIP to include impact-absorbing features that will reduce the induced energy. The impact absorbing features of the new design include: Impact-absorbing material at the IPSS base and at the upper portion of the IPSS legs. A sleeve which provides a hydraulic means of absorbing energy. Designing the OIP to act as an impact absorber. The existing IPSS structure in 105 KW will be removed. This conceptual design considers only loads resulting from drops directly over the IPSS and south loadout pit area. Drops in other areas of the basin are not considered, and will be covered as part of a future revision to this CDR.

LANGEVIN, A.S.

1999-07-12T23:59:59.000Z

314

Resources, and the United States Environmental Protection AgencyDesigning Rate Structures that Support Your Objectives: Guidelines for NC Water Systems  

E-Print Network (OSTI)

The purpose for these rate setting guidelines is to provide water and wastewater utility managers and technical assistance providers with a framework in setting water and wastewater rates and rate structures that would meet the state’s and the utility’s policies and objectives. These guidelines provide step by step instructions and necessary information to allow the utility manager to make an informed policy-driven choice on the rate structure design. These guidelines do not provide instruction on how to project revenues and costs and how to calculate rates (dollar amounts) to balance a budget, but references other documents that provide such guidelines. These rate setting guidelines were developed by the Environmental Finance Center at the

unknown authors

2009-01-01T23:59:59.000Z

315

Whither design space?  

Science Conference Proceedings (OSTI)

Design space exploration is a long-standing focus in computational design research. Its three main threads are accounts of designer action, development of strategies for amplification of designer action in exploration, and discovery of computational ... Keywords: Design Space Exploration, Knowledge Representation, Search, State Space, Typed Feature Structures

Robert F. Woodbury; Andrew L. Burrow

2006-04-01T23:59:59.000Z

316

Hierarchical fusion of expert opinions in the Transferable Belief Model, application to climate sensitivity  

Science Conference Proceedings (OSTI)

This paper examines the fusion of conflicting and not independent expert opinion in the Transferable Belief Model. A hierarchical fusion procedure based on the partition of experts into schools of thought is introduced, justified by the sociology of ... Keywords: Climate sensitivity, Expert aggregation, Information fusion, Transferable Belief Model

Minh Ha-Duong

2008-11-01T23:59:59.000Z

317

A Real-Time, Hierarchical, Sensor-Based Robotic System Architecture  

Science Conference Proceedings (OSTI)

A robotic system architecture is presented and its real-time performance, when used to control a robotic gripper system for deformation-free handling of limp material, is evaluated. A major problem to be overcome has been the integrability and compatibility ... Keywords: compatibility, hierarchical control, sensor-based control, system architecture, system integration

Timothy Hebert; Kimon Valavanis; Ramesh Kolluru

1998-01-01T23:59:59.000Z

318

Optimal and hierarchical clustering of large-scale hybrid networks for scientific mapping  

Science Conference Proceedings (OSTI)

Previous studies have shown that hybrid clustering methods based on textual and citation information outperforms clustering methods that use only one of these components. However, former methods focus on the vector space model. In this paper we apply ... Keywords: Bibliometric analysis, Modularity optimization, Network analysis, Optimal and hierarchical clustering, Text mining

Xinhai Liu; Wolfgang Glänzel; Bart Moor

2012-05-01T23:59:59.000Z

319

Applying a Weighting Matrix to the Hierarchical Neural Network Model for Handwritten Thai Character Recognition  

Science Conference Proceedings (OSTI)

This paper proposes a new neural network approach to the off-line handwritten Thai character recognition. This new neural network is a hierarchical neural network; it employs the concept of a weighting matrix in measuring the similarity between the incoming ...

Arit Thammano; Patcharawadee Poolsamran

2006-11-01T23:59:59.000Z

320

A hierarchical application of the Minimum Current Corona C. Beveridge and D.W. Longcope  

E-Print Network (OSTI)

A hierarchical application of the Minimum Current Corona C. Beveridge and D.W. Longcope Department. Beveridge, C.: 2003, Ph.D. Thesis, University of St. Andrews. Beveridge, C. and Longcope, D.W.: 2005, Solar.M.: 1990, Astrophys. J., 366, 577. Longcope, D.W.: 1996, Solar Phys, 169, 91. Longcope, D.W.: 2001, Phys

Longcope, Dana

Note: This page contains sample records for the topic "hierarchical structure designed" 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
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321

Supplier selection paradigm: An integrated hierarchical QFD methodology under multiple-criteria environment  

Science Conference Proceedings (OSTI)

A concurrent engineering approach integrating analytic hierarchy process (AHP) with quality function deployment (QFD) in combination with cost factor measure (CFM) has been delineated to rank and subsequently select candidate-suppliers under multiple, ... Keywords: CFM, Decision support, Hierarchical MCDM, Multi-criteria decision-making (MCDM), Quality function deployment (QFD), Supplier selection

Arijit Bhattacharya; John Geraghty; Paul Young

2010-09-01T23:59:59.000Z

322

A new procedure for the construction of hierarchical high order Hdiv and Hcurl finite element spaces  

Science Conference Proceedings (OSTI)

This paper considers a systematic procedure for the construction of a hierarchy of high order finite element approximation for Hdiv and Hcurl spaces based on triangular and quadrilateral partitions of bidimensional domains. The principle is to choose ... Keywords: Hdiv approximating spaces, Hierarchical finite element bases, Mixed finite element formulations

Denise De Siqueira; Phillipe R. B. Devloo; SôNia M. Gomes

2013-03-01T23:59:59.000Z

323

Hierarchical Spatio-Temporal Context Modeling for Action Recognition , Shuicheng Yan3  

E-Print Network (OSTI)

-temporal context model with the Space-Time Inter- est Point (STIP) proposed in [6] for recognizing human ac- tions performance comparison of our hierarchical spatial-temporal context model with the STIP features in [6+TPD, SIFT+TTD+TPD, STIP. jectory transition descriptor (TTD), and trajectory proxim- ity descriptor (TPD

Fah, Cheong Loong

324

CBM-Gen+: An Algorithm for Reducing Case Base Inconsistencies in Hierarchical and Incomplete Domains  

E-Print Network (OSTI)

formulated case base maintenance (CBM) policies for reducing the size of the case base without losingCBM-Gen+: An Algorithm for Reducing Case Base Inconsistencies in Hierarchical and Incomplete Lehigh University Bethlehem, PA 18015,USA {kex2,hem4}@ lehigh.edu Abstract. We propose an algorithm, CBM

Muñoz-Avila, Héctor

325

A Hierarchical Phrase-Based Model for Statistical Machine Translation David Chiang  

E-Print Network (OSTI)

A Hierarchical Phrase-Based Model for Statistical Machine Translation David Chiang Institute is a constituent 0 otherwise as determined by a statistical tree-substitution- grammar parser (Bikel and Chiang. Journal of Com- puter and System Sciences, 3:37­56. Daniel M. Bikel and David Chiang. 2000. Two statis

Chiang, David

326

Organizational strategy development in distribution channel management using fuzzy AHP and hierarchical fuzzy TOPSIS  

Science Conference Proceedings (OSTI)

Distribution channel management not only consists of choosing distribution channels. In fact, probably the most difficult phase of the distribution management starts after this choice. Determining an appropriate organization strategy for distribution ... Keywords: Distribution channel management, Distribution organization, Extent analysis method, Fuzzy analytic hierarchy process, Hierarchical fuzzy TOPSIS

Turan Paksoy; Nimet Yapici Pehlivan; Cengiz Kahraman

2012-02-01T23:59:59.000Z

327

Extracting ultra-scale Lattice Boltzmann performance via hierarchical and distributed auto-tuning  

Science Conference Proceedings (OSTI)

We are witnessing a rapid evolution of HPC node architectures and on-chip parallelism as power and cooling constraints limit increases in microprocessor clock speeds. In this work, we demonstrate a hierarchical approach towards effectively extracting ... Keywords: BlueGene, Lattice Boltzmann, OpenMP, SIMD, auto-tuning, hybrid programming models

Samuel Williams; Leonid Oliker; Jonathan Carter; John Shalf

2011-11-01T23:59:59.000Z

328

Sea Surface Temperature Patterns on the West Florida Shelf Using Growing Hierarchical Self-Organizing Maps  

Science Conference Proceedings (OSTI)

Neural network analyses based on the self-organizing map (SOM) and the growing hierarchical self-organizing map (GHSOM) are used to examine patterns of the sea surface temperature (SST) variability on the West Florida Shelf from time series of ...

Yonggang Liu; Robert H. Weisberg; Ruoying He

2006-02-01T23:59:59.000Z

329

Four-scanning attack on hierarchical digital watermarking method for image tamper detection and recovery  

Science Conference Proceedings (OSTI)

In a recent paper presented by Lin et al., a block-based hierarchical watermarking algorithm for digital images is proposed. It adopts parity check and the intensity-relation check to conduct the experiment of image tamper detection. Their experimental ... Keywords: Fragile watermarking, Image authentication, Tamper detection

Chin-Chen Chang; Yi-Hsuan Fan; Wei-Liang Tai

2008-02-01T23:59:59.000Z

330

A multi-category inter-purchase time model based on hierarchical Bayesian theory  

Science Conference Proceedings (OSTI)

Because of recent diversity in consumer demands and the decrease in popularity of mass media, one-to-one database marketing is being increasingly used by companies to increase their competitiveness. Many studies have addressed the issue of inter-purchase ... Keywords: Catalog shopping, Hierarchical Bayesian model, Inter-purchase time

Ruey-Shan Guo

2009-04-01T23:59:59.000Z

331

CHAMPION: Intelligent Hierarchical Reasoning Agents for Enhanced Decision Support  

SciTech Connect

We describe the design and development of an advanced reasoning framework employing semantic technologies, organized within a hierarchy of computational reasoning agents that interpret domain specific information. Designed based on an inspirational metaphor of the pattern recognition functions performed by the human neocortex, the CHAMPION reasoning framework represents a new computational modeling approach that derives invariant knowledge representations through memory-prediction belief propagation processes that are driven by formal ontological language specification and semantic technologies. The CHAMPION framework shows promise for enhancing complex decision making in diverse problem domains including cyber security, nonproliferation and energy consumption analysis.

Hohimer, Ryan E.; Greitzer, Frank L.; Noonan, Christine F.; Strasburg, Jana D.

2011-11-15T23:59:59.000Z

332

Structured Menu Presentation Using Spatial Sound Separation  

Science Conference Proceedings (OSTI)

This paper describes a technique to support user interaction in a hierarchical menu, based on spatial sound separation. A complex menu structure is represented in space using a limited number of sound positions obtained by stereo panning or 3-D audio ...

Gaëtan Lorho; Jarmo Hiipakka; Juha Marila

2002-09-01T23:59:59.000Z

333

Final LDRD report : design and fabrication of advanced device structures for ultra high efficiency solid state lighting.  

SciTech Connect

The goal of this one year LDRD was to improve the overall efficiency of InGaN LEDs by improving the extraction of light from the semiconductor chip. InGaN LEDs are currently the most promising technology for producing high efficiency blue and green semiconductor light emitters. Improving the efficiency of InGaN LEDs will enable a more rapid adoption of semiconductor based lighting. In this LDRD, we proposed to develop photonic structures to improve light extraction from nitride-based light emitting diodes (LEDs). While many advanced device geometries were considered for this work, we focused on the use of a photonic crystal for improved light extraction. Although resonant cavity LEDs and other advanced structures certainly have the potential to improve light extraction, the photonic crystal approach showed the most promise in the early stages of this short program. The photonic crystal (PX)-LED developed here incorporates a two dimensional photonic crystal, or photonic lattice, into a nitride-based LED. The dimensions of the photonic crystal are selected such that there are very few or no optical modes in the plane of the LED ('lateral' modes). This will reduce or eliminate any radiation in the lateral direction so that the majority of the LED radiation will be in vertical modes that escape the semiconductor, which will improve the light-extraction efficiency. PX-LEDs were fabricated using a range of hole diameters and lattice constants and compared to control LEDs without a photonic crystal. The far field patterns from the PX-LEDs were dramatically modified by the presence of the photonic crystal. An increase in LED brightness of 1.75X was observed for light measured into a 40 degree emission cone with a total increase in power of 1.5X for an unencapsulated LED.

Koleske, Daniel David; Bogart, Katherine Huderle Andersen; Shul, Randy John; Wendt, Joel Robert; Crawford, Mary Hagerott; Allerman, Andrew Alan; Fischer, Arthur Joseph

2005-04-01T23:59:59.000Z

334

A one-pot synthetic approach to prepare palladium nanoparticles embedded hierarchically porous TiO{sub 2} hollow spheres for hydrogen peroxide sensing  

SciTech Connect

A simple one-step method to fabricate hierarchically porous TiO{sub 2}/Pd composite hollow spheres without any template was developed by using solvothermal treatment. Pd nanoparticles (2-5 nm) were well dispersed in the mesopores of the TiO{sub 2} hollow spheres via in-situ reduction. In our experiment, polyvinylpyrrolidone played an important role in the synthetic process as the reducing agent and the connective material between TiO{sub 2} and Pd nanoparticles. HF species generated from solvothermal reaction leaded to the formation of TiO{sub 2} hollow spheres and Ostwald ripening was another main factor that affected the size and structure of the hollow spheres. The as-prepared TiO{sub 2}/Pd composite hollow spheres exhibited high electrocatalytic activity towards the reduction of H{sub 2}O{sub 2}. The sensitivity was about 226.72 {mu}A mM{sup -1} cm{sup -2} with a detection limit of 3.81 {mu}M at a signal-to-noise ratio of 3. These results made the hierarchically porous TiO{sub 2}/Pd composite a promising platform for fabricating new nonenzymic biosensors. - Graphical Abstract: A new one-step solvothermal method was developed to prepare Pd nanoparticles embedded hierarchically porous TiO{sub 2} hollow spheres. Due to its unique nanostructure, the prepared TiO{sub 2}/Pd modified GC electrode exhibit a high sensitivity (226.72 {mu}A mM{sup -1} cm{sup -2}), a relatively low reduction potential (-0.2 V), a fast response time (<3 s) and a relatively low detection limit of 3.81 {mu}M (S/N=3) towards H{sub 2}O{sub 2}.

Kong Lirong [Alan G. MacDiarmid Institute, Jilin University, Changchun 130012 (China); Lu Xiaofeng, E-mail: xflu@jlu.edu.c [Alan G. MacDiarmid Institute, Jilin University, Changchun 130012 (China); Bian Xiujie; Zhang Wanjin [Alan G. MacDiarmid Institute, Jilin University, Changchun 130012 (China); Wang Ce, E-mail: cwang@jlu.edu.c [Alan G. MacDiarmid Institute, Jilin University, Changchun 130012 (China)

2010-10-15T23:59:59.000Z

335

Synthesizing hierarchical state machines from expressive scenario descriptions  

Science Conference Proceedings (OSTI)

There are many examples in the literature of algorithms for synthesizing state machines from scenario-based models. The motivation for these is to automate the transition from scenario-based requirements to early behavioral design models. To date, however, ... Keywords: State machine synthesis, interaction overview diagrams, scenario-based requirements, software modeling

Jon Whittle; Praveen K. Jayaraman

2010-01-01T23:59:59.000Z

336

A hierarchical component model for large parallel interactive applications  

Science Conference Proceedings (OSTI)

This paper focuses on parallel interactive applications ranging from scientific visualization, to virtual reality or computational steering. Interactivity makes them particular on three main aspects: they are endlessly iterative, use advanced I/O devices, ... Keywords: Components, Composite design pattern, Interactive applications, Parallelism

Jean-Denis Lesage; Bruno Raffin

2012-06-01T23:59:59.000Z

337

Hierarchical phase space structure of dark matter haloes: Tidal debris, caustics, and dark matter annihilation  

E-Print Network (OSTI)

Most of the mass content of dark matter haloes is expected to be in the form of tidal debris. The density

Bertschinger, Edmund

338

Hierarchical web resources retrieval by exploiting Fuzzy Formal Concept Analysis  

Science Conference Proceedings (OSTI)

In recent years, knowledge structuring is assuming important roles in several real world applications such as decision support, cooperative problem solving, e-commerce, Semantic Web and, even in planning systems. Ontologies play an important role in ... Keywords: Facet-based navigation, Fuzzy Formal Concept Analysis, Fuzzy ontology, Information Retrieval, Lattice

Carmen De Maio; Giuseppe Fenza; Vincenzo Loia; Sabrina Senatore

2012-05-01T23:59:59.000Z

339

Bayesian spatial models with a mixture neighborhood structure  

Science Conference Proceedings (OSTI)

In Bayesian disease mapping, one needs to specify a neighborhood structure to make inference about the underlying geographical relative risks. We propose a model in which the neighborhood structure is part of the parameter space. We retain the Markov ... Keywords: 62H11, 62H20, 62J12, 62M40, Disease mapping, Markov random field, Spatial hierarchical models

E. C. Rodrigues; R. Assunção

2012-08-01T23:59:59.000Z

340

Structure-property relationships in radical-cation (electron-donor molecule) and anion-based (including fullerides) organic superconductors and their use in the design of new materials  

Science Conference Proceedings (OSTI)

The presently known structure-property relations that have been developed for organic superconductors based on the ET molecule (b- phases and k-phases), and the C{sub 60}-anion-based fullerides, and their use in the structural design of new superconducting materials are discussed. 12 refs, 11 figs, 4 tabs.

Williams, J.M.; Carlson, K.D.; Kini, A.M. [Argonne National Lab., IL (United States)

1993-08-01T23:59:59.000Z

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341

Work Breakdown Structure and Plant/Equipment Designation System Numbering Scheme for the High Temperature Gas- Cooled Reactor (HTGR) Component Test Capability (CTC)  

SciTech Connect

This white paper investigates the potential integration of the CTC work breakdown structure numbering scheme with a plant/equipment numbering system (PNS), or alternatively referred to in industry as a reference designation system (RDS). Ideally, the goal of such integration would be a single, common referencing system for the life cycle of the CTC that supports all the various processes (e.g., information, execution, and control) that necessitate plant and equipment numbers be assigned. This white paper focuses on discovering the full scope of Idaho National Laboratory (INL) processes to which this goal might be applied as well as the factors likely to affect decisions about implementation. Later, a procedure for assigning these numbers will be developed using this white paper as a starting point and that reflects the resolved scope and outcome of associated decisions.

Jeffrey D Bryan

2009-09-01T23:59:59.000Z

342

Studies of block copolypeptide synthesis, self-assembly, and structure-directing ability  

E-Print Network (OSTI)

The use of organic compounds as templates to assemble inorganic materials with structures over multiple length scales has received much attention due to the potential applications that can be developed from these materials. Many organisms synthesize organic/inorganic composites with exceptional control over morphology, physical properties, and nanoscale organization of these materials. Materials such as bone, nacre, and silica diatoms are excellent examples of the complex yet highly controllable hierarchically structured materials nature can form at ambient conditions. The ability to mimic these organisms through the design of supramolecular assemblies and use them to direct the growth of hierarchically structured materials has increased significantly in recent years. In this dissertation, block copolypeptide templated inorganic materials were synthesized and characterized using a wide range of analytical techniques. There are three major conclusions from this dissertation. First, the conformation of a polypeptide chain can be used to manipulate the porosity of oxide materials obtained. Second, individual supramolecular objects (vesicles) formed by block copolypeptides can be used as templates to form nanostructured hard materials. Third, polypeptide chemistry and solution conditions can be used to control both the morphology and porosity of the hard materials they assemble. This dissertation also describes preliminary work toward designing the block copolypeptides derivatives for biomimetic inorganic synthesis and gene delivery. This work includes the synthesis of these block copolypeptides derivatives and of the templated oxide materials. Some interesting silica materials such as porous silicas and silica nanocapsules were synthesized using double hydrophilic block copolypeptides derivatives as templates. Also, the preliminary work of using these block copolypeptides derivatives for gene delivery is included and shows these copolypeptide derivatives are potential delivery vehicles.

Jan, Jeng-Shiung

2006-12-01T23:59:59.000Z

343

An Information Services Algorithm to Heuristically Summarize IP Addresses for a Distributed, Hierarchical Directory Service  

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

information services algorithm to heuristically summarize IP addresses for a information services algorithm to heuristically summarize IP addresses for a distributed, hierarchical directory service Marcos Portnoi, Martin Swany Department of Computer and Information Sciences University of Delaware Newark, DE 19716, U.S.A. {portnoi, swany}@cis.udel.edu Jason Zurawski Internet2 Washington, DC 20036, U.S.A. zurawski@internet2.edu Abstract- A distributed, hierarchical information service for computer networks might use several service instances, located in different layers. A distributed directory service, for example, might be comprised of upper level listings, and local directories. The upper level listings contain a compact version of the local directories. Clients desiring to access the information contained in local directories might first access the

344

Hierarchical path planning for situated agents in informed virtual geographic environments  

Science Conference Proceedings (OSTI)

Multi-Agent Geo-Simulation (MAGS) is a modelling and simulation paradigm which involves a large number of autonomous situated agents of various extents evolving in, and interacting with, an explicit description of a geographic environment called a Virtual ... Keywords: autonomous situated agents (ASA), geographic information system (GIS), hierarchical path planning (HPP), informed virtual geographic environment (IVGE), multi-agent geo-simulation (MAGS), optimisation, situated reasoning (SR)

Mehdi Mekni

2010-03-01T23:59:59.000Z

345

Decision support system based on hierarchical co-evolutionary fuzzy approach: A case study in detecting gamma ray signals  

Science Conference Proceedings (OSTI)

Decision support systems are powerful technologies for complex decision making and problem solving. However, constructing an accurate and interpretable decision support system (DSS) for any domain is a challenge. In this paper, a novel hierarchical co-evolutionary ... Keywords: ANFIS, Co-evolutionary learning, DENFIS, Decision support system, Fuzzy system, Genetic algorithm, HiCEFS, Hierarchical co-evolutionary fuzzy system, High-energy gamma rays, TSK

H. Huang; M. Pasquier; C. Quek

2011-09-01T23:59:59.000Z

346

Generating well-distributed point sets with a self-similar hierarchical tile  

E-Print Network (OSTI)

We present a method for generating well-distributed point according to a given density. Our method is based on a single precomputed tile. The tile is both self-similar and hierarchical. A selfsimilar tile allows to increase the density of points in large steps by recursively subdividing the tile. A hierarchical tile allows to smoothly adjust the density of points. We present an interesting method to construct a self-similar point distribution, we show how to construct a well-distributed self-similar point distribution, and how to make a point distribution hierarchical. Our method is capable of generating well-distributed point sets in real time, using an algorithm that is easy to implement. However, because only a single tile is used, noticeable periodicity is introduced in the generated point distributions. Therefore, our method is somewhat better suited for applications that do not require point distributions with a high visual quality, such as sampling. Volume xx (200y), Number z, pp. 1–8

Philip Dutré; Philip Dutré; Ares Lagae; Philip Dutré

2006-01-01T23:59:59.000Z

347

Sliding coherence window technique for hierarchical detection of continuous gravitational waves  

E-Print Network (OSTI)

A novel hierarchical search technique is presented for all-sky surveys for continuous gravitational-wave sources, such as rapidly spinning nonaxisymmetric neutron stars. Analyzing yearlong detector data sets over realistic ranges of parameter space using fully coherent matched-filtering is computationally prohibitive. Thus more efficient, so-called hierarchical techniques are essential. Traditionally, the standard hierarchical approach consists of dividing the data into nonoverlapping segments of which each is coherently analyzed and subsequently the matched-filter outputs from all segments are combined incoherently. The present work proposes to break the data into subsegments shorter than the desired maximum coherence time span (size of the coherence window). Then matched-filter outputs from the different subsegments are efficiently combined by sliding the coherence window in time: Subsegments whose timestamps are closer than coherence window size are combined coherently, otherwise incoherently. Compared to the standard scheme at the same coherence time baseline, data sets longer by about 50-100% would have to be analyzed to achieve the same search sensitivity as with the sliding coherence window approach. Numerical simulations attest to the analytically estimated improvement.

Holger J. Pletsch

2011-01-27T23:59:59.000Z

348

Sliding coherence window technique for hierarchical detection of continuous gravitational waves  

Science Conference Proceedings (OSTI)

A novel hierarchical search technique is presented for all-sky surveys for continuous gravitational-wave sources, such as rapidly spinning nonaxisymmetric neutron stars. Analyzing yearlong detector data sets over realistic ranges of parameter space using fully coherent matched-filtering is computationally prohibitive. Thus more efficient, so-called hierarchical techniques are essential. Traditionally, the standard hierarchical approach consists of dividing the data into nonoverlapping segments of which each is coherently analyzed, and subsequently the matched-filter outputs from all segments are combined incoherently. The present work proposes to break the data into subsegments shorter than the desired maximum coherence time span (size of the coherence window). Then matched-filter outputs from the different subsegments are efficiently combined by sliding the coherence window in time: Subsegments whose timestamps are closer than coherence window size are combined coherently, otherwise incoherently. Compared to the standard scheme at the same coherence time baseline, data sets longer by about 50-100% would have to be analyzed to achieve the same search sensitivity as with the sliding coherence window approach. Numerical simulations attest to the analytically estimated improvement.

Pletsch, Holger J. [Max-Planck-Institut fuer Gravitationsphysik (Albert-Einstein-Institut) and Leibniz Universitaet Hannover, Callinstrasse 38, D-30167 Hannover (Germany)

2011-06-15T23:59:59.000Z

349

DEVELOPMENT OF A PRODUCTION COST ESTIMATION FRAMEWORK TO SUPPORT PRODUCT FAMILY DESIGN  

E-Print Network (OSTI)

The main task of a product family designer is to decide the right components/design variables to share among products to maintain economies of scale with minimum sacrifice in the performance of each product in the family. The decisions are usually based on several criteria, but production cost is of primary concern. Estimating the production cost of a family of products involves both estimating the production cost of each product in the family and the costs incurred by common and variant components/design variables in the family. To estimate these costs consistently and accurately, we propose a production cost estimation framework to support product family design based on Activity-Based Costing (ABC) that consists of three stages: (1) allocation, (2) estimation, and (3) analysis. In the allocation stage, the production activities and resources needed to produce the entire products in a family are identified and classified with an activity table, a resource table, and a production flow. To help allocate product data for production, a product family structure is represented by a hierarchical classification of products that form the product family. In the estimation stage, production costs are estimated with cost estimation methods selected based on the type of information available. In the analysis stage,

Jaeil Park; Timothy W. Simpson

2004-01-01T23:59:59.000Z

350

Improving Performance of Cluster Based Routing Protocol using Cross-Layer Design  

E-Print Network (OSTI)

The main goal of routing protocol is to efficiency delivers data from source to destination. All routing protocols are the same in this goal, but the way they adopt to achieve it is different, so routing strategy has an egregious role on the performance of an ad hoc network. Most of routing protocols proposed for ad hoc networks have a flat structure. These protocols expand the control overhead packets to discover or maintain a route. On the other hand a number of hierarchical-based routing protocols have been developed, mostly are based on layered design. These protocols improve network performances especially when the network size grows up since details about remote portion of network can be handled in an aggregate manner. Although, there is another approach to design a protocol called cross-layer design. Using this approach information can exchange between different layer of protocol stack, result in optimizing network performances. In this paper, we intend to exert cross-layer design to optimize Cluster B...

Jahanbakhsh, Kazem

2008-01-01T23:59:59.000Z

351

Determining the Bayesian optimal sampling strategy in a hierarchical system.  

SciTech Connect

Consider a classic hierarchy tree as a basic model of a 'system-of-systems' network, where each node represents a component system (which may itself consist of a set of sub-systems). For this general composite system, we present a technique for computing the optimal testing strategy, which is based on Bayesian decision analysis. In previous work, we developed a Bayesian approach for computing the distribution of the reliability of a system-of-systems structure that uses test data and prior information. This allows for the determination of both an estimate of the reliability and a quantification of confidence in the estimate. Improving the accuracy of the reliability estimate and increasing the corresponding confidence require the collection of additional data. However, testing all possible sub-systems may not be cost-effective, feasible, or even necessary to achieve an improvement in the reliability estimate. To address this sampling issue, we formulate a Bayesian methodology that systematically determines the optimal sampling strategy under specified constraints and costs that will maximally improve the reliability estimate of the composite system, e.g., by reducing the variance of the reliability distribution. This methodology involves calculating the 'Bayes risk of a decision rule' for each available sampling strategy, where risk quantifies the relative effect that each sampling strategy could have on the reliability estimate. A general numerical algorithm is developed and tested using an example multicomponent system. The results show that the procedure scales linearly with the number of components available for testing.

Grace, Matthew D.; Ringland, James T.; Boggs, Paul T.; Pebay, Philippe Pierre

2010-09-01T23:59:59.000Z

352

Optimization and Multihazard Structural Design  

Science Conference Proceedings (OSTI)

... The water is heated by ground-level computer- controlled rotating mirrors that focus reflected solar rays onto the pipe. The resulting heat is used for ...

2013-07-24T23:59:59.000Z

353

Hierarchical Models for Batteries: Overview with Some Case Studies  

Science Conference Proceedings (OSTI)

Batteries are complex multiscale systems and a hierarchy of models has been employed to study different aspects of batteries at different resolutions. For the electrochemistry and charge transport, the models span from electric circuits, single-particle, pseudo 2D, detailed 3D, and microstructure resolved at the continuum scales and various techniques such as molecular dynamics and density functional theory to resolve the atomistic structure. Similar analogies exist for the thermal, mechanical, and electrical aspects of the batteries. We have been recently working on the development of a unified formulation for the continuum scales across the electrode-electrolyte-electrode system - using a rigorous volume averaging approach typical of multiphase formulation. This formulation accounts for any spatio-temporal variation of the different properties such as electrode/void volume fractions and anisotropic conductivities. In this talk the following will be presented: The background and the hierarchy of models that need to be integrated into a battery modeling framework to carry out predictive simulations, Our recent work on the unified 3D formulation addressing the missing links in the multiscale description of the batteries, Our work on microstructure resolved simulations for diffusion processes, Upscaling of quantities of interest to construct closures for the 3D continuum description, Sample results for a standard Carbon/Spinel cell will be presented and compared to experimental data, Finally, the infrastructure we are building to bring together components with different physics operating at different resolution will be presented. The presentation will also include details about how this generalized approach can be applied to other electrochemical storage systems such as supercapacitors, Li-Air batteries, and Lithium batteries with 3D architectures.

Pannala, Sreekanth [ORNL; Mukherjee, Partha P [ORNL; Allu, Srikanth [ORNL; Nanda, Jagjit [ORNL; Martha, Surendra K [ORNL; Dudney, Nancy J [ORNL; Turner, John A [ORNL

2012-01-01T23:59:59.000Z

354

Real-Time Combined Heat and Power Operational Strategy Using a Hierarchical Optimization Algorithm  

Science Conference Proceedings (OSTI)

Existing attempts to optimize the operation of Combined Heat and Power (CHP) systems for building applications have two major limitations: the electrical and thermal loads are obtained from historical weather profiles; and the CHP system models ignore transient responses by using constant equipment efficiencies. This paper considers the transient response of a building combined with a hierarchical CHP optimal control algorithm to obtain a real-time integrated system that uses the most recent weather and electric load information. This is accomplished by running concurrent simulations of two transient building models. The first transient building model uses current as well as forecast input information to obtain short term predictions of the thermal and electric building loads. The predictions are then used by an optimization algorithm, i.e., a hierarchical controller, that decides the amount of fuel and of electrical energy to be allocated at the current time step. In a simulation, the actual physical building is not available and, hence, to simulate a real-time environment, a second, building model with similar but not identical input loads are used to represent the actual building. A state-variable feedback loop is completed at the beginning of each time step by copying, i.e., measuring, the state variable from the actual building and restarting the predictive model using these ?measured? values as initial conditions. The simulation environment presented in this paper features nonlinear effects such as the dependence of the heat exchanger effectiveness on their operating conditions. The results indicate that the CHP engine operation dictated by the proposed hierarchical controller with uncertain weather conditions have the potential to yield significant savings when compared to conventional systems using current values of electricity and fuel prices.

Yun, Kyung Tae; Cho, Heejin; Luck, Rogelio; Mago, Pedro J.

2011-06-01T23:59:59.000Z

355

A Hierarchical Multiscale Approach to History Matching and Optimization for Reservoir Management in Mature Fields  

E-Print Network (OSTI)

Reservoir management typically focuses on maximizing oil and gas recovery from a reservoir based on facts and information while minimizing capital and operating investments. Modern reservoir management uses history-matched simulation model to predict the range of recovery or to provide the economic assessment of different field development strategies. Geological models are becoming increasingly complex and more detailed with several hundred thousand to million cells, which include large sets of subsurface uncertainties. Current issues associated with history matching, therefore, involve extensive computation (flow simulations) time, preserving geologic realism, and non-uniqueness problem. Many of recent rate optimization methods utilize constrained optimization techniques, often making them inaccessible for field reservoir management. Field-scale rate optimization problems involve highly complex reservoir models, production and facilities constraints and a large number of unknowns. We present a hierarchical multiscale calibration approach using global and local updates in coarse and fine grid. We incorporate a multiscale framework into hierarchical updates: global and local updates. In global update we calibrate large-scale parameters to match global field-level energy (pressure), which is followed by local update where we match well-by-well performances by calibration of local cell properties. The inclusion of multiscale calibration, integrating production data in coarse grid and successively finer grids sequentially, is critical for history matching high-resolution geologic models through significant reduction in simulation time. For rate optimization, we develop a hierarchical analytical method using streamline-assisted flood efficiency maps. The proposed approach avoids use of complex optimization tools; rather we emphasize the visual and the intuitive appeal of streamline method and utilize analytic solutions derived from relationship between streamline time of flight and flow rates. The proposed approach is analytic, easy to implement and well-suited for large-scale field applications. Finally, we present a hierarchical Pareto-based approach to history matching under conflicting information. In this work we focus on multiobjective optimization problem, particularly conflicting multiple objectives during history matching of reservoir performances. We incorporate Pareto-based multiobjective evolutionary algorithm and Grid Connectivity-based Transformation (GCT) to account for history matching with conflicting information. The power and effectiveness of our approaches have been demonstrated using both synthetic and real field cases.

Park, Han-Young

2012-08-01T23:59:59.000Z

356

Template-Free Synthesis of Hierarchical Porous Metal-Organic Frameworks  

Science Conference Proceedings (OSTI)

A template-free synthesis of a hierarchical microporous-mesoporous metal-organic framework (MOF) of Zn(II)-2,5-dihydroxy-1,4-benzenedicarboxylate, namely Zn-MOF-74, is reported. The surface morphology and porosity of the bimodal materials can be modified by etching the pore walls with the synthesis solvent under different reaction times and different solvents. This template-free strategy allows for the preparation of stable frameworks with mesopores exceeding 15 nm, which was previously unattained by the synthesis of MOFs by ligand exten-sion method.

Yue, Yanfeng [ORNL; Qiao, Zhen-an [University of Tennessee, Knoxville (UTK); Fulvio, Pasquale F [ORNL; Dai, Sheng [ORNL; Binder, Andrew J [ORNL; Tian, Chengcheng [ORNL; Nelson, Kimberly M [ORNL; Zhu, Xiang [ORNL

2013-01-01T23:59:59.000Z

357

Construction of an informative hierarchical prior distribution. Application to electricity load forecasting  

E-Print Network (OSTI)

In this paper, we are interested in the estimation and prediction of a parametric model on a short dataset upon which it is expected to overfit and perform badly. To overcome the lack of data (relatively to the dimension of the model) we propose the construction of a hierarchical informative Bayesian prior based upon another longer dataset which is assumed to share some similarities with the original, short dataset. We apply the methodology to a basic model for the electricity load forecasting on both simulated and real datasets, where it leads to a substantial improvement of the quality of the predictions.

Launay, Tristan; Lamarche, Sophie

2012-01-01T23:59:59.000Z

358

Labs21 sustainable design programming checklist version 1.0  

SciTech Connect

This checklist of sustainable design objectives and strategies can be used in the programming and conceptual design phases of a laboratory project. It includes the following: (1) Brief descriptions of each objective and strategy. (2) Metrics for each objective. This checklist is primarily to be used by owners, architects and engineers during the programming and conceptual design phase of a project. It is especially appropriate for use in design charrettes. The strategies and metrics can be included as requirements in the programming document or can be identified for further analysis or consideration during the design development phase. This checklist is hierarchically organized into design areas, objectives for each design area, and strategies and metrics for each objective. The design areas generally correspond to the design areas of the LEED(TM) rating system from the U.S. Green Building Council.

Mathew, Paul; Greenberg, Steve

2005-01-07T23:59:59.000Z

359

Hierarchical Diagnosis  

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

Theoretical Studies of Theoretical Studies of Radiative Properties of Broken Clouds G. A. Titov Institute of Atmospheric Optics Russian Academy of Science T omsk, Russia One of the three major goals of the Atmospheric Radiation Measurement (ARM) Program is to improve the quality of radiation models under clear sky, homogeneous cloud, and broken cloud conditions. This report is concerned with the development of the theory of radiation transfer in the broken clouds. Our approach is based on a stochastic description of the interaction between the radiation and cloud field with stochastic geometry; the main results are presented in Titov (1990, 1993). In the following, we discuss .the mean radiation fluxes in the near IR spectral range 2.7 to 3.2 ~m .the influence of random geometry of individual cumulus

360

Hierarchical Diagnosis  

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

Development of a Rad iative Cloud Development of a Rad iative Cloud Parameterization Scheme of Stratocumulus and Stratus Clouds Which Includes the Impact of Cloud Condensation Nucleus on Cloud Albedo W. R. Cotton, G. L. Stephens, D. Duda, B. Stevens, and R. L. Walko Colorado State University Department of Atmospheric Science Fort Collins, CO G. Feingold Cooperative Institute for Research in Environmental Sciences University of Colorado, Boulder Boulder. CO 80309-0049 A three-dimensional (3-D) model for simulating the effect of enhanced cloud condensation nucleus (CCN) concentrations on stratocumulus clouds is presented. Results of two-dimensional (2-D) tests are discussed for a control run and a sensitivity run where CCN spectra were taken to be typical of clean marine conditions or mildly continental air, respectively. For a fivefold increase in

Note: This page contains sample records for the topic "hierarchical structure designed" 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

Structuring beyond architecture  

E-Print Network (OSTI)

This thesis explores the layering and negotiation of structural devices in urban settings. Its point of departure is a series of patterns of how structural design and urban design interact and overlap, from which are ...

Foxe, David M

2006-01-01T23:59:59.000Z

362

Problem-orientable numerical algorithm for modelling multi-dimensional radiative MHD flows in astrophysics -- the hierarchical solution scenario  

E-Print Network (OSTI)

We present a hierarchical approach for enhancing the robustness of numerical solvers for modelling radiative MHD flows in multi-dimensions. This approach is based on clustering the entries of the global Jacobian in a hierarchical manner that enables employing a variety of solution procedures ranging from a purely explicit time-stepping up to fully implicit schemes. A gradual coupling of the radiative MHD equation with the radiative transfer equation in higher dimensions is possible. Using this approach, it is possible to follow the evolution of strongly time-dependent flows with low/high accuracies and with efficiency comparable to explicit methods, as well as searching quasi-stationary solutions for highly viscous flows. In particular, it is shown that the hierarchical approach is capable of modelling the formation of jets in active galactic nuclei and reproduce the corresponding spectral energy distribution with a reasonable accuracy.

A. A. Hujeirat

2004-10-26T23:59:59.000Z

363

Design, Total Chemical Synthesis, and X-Ray Structure of a Protein Having a Novel Linear-Loop Polypeptide Chain Topology  

Science Conference Proceedings (OSTI)

Original synthetic and structure determination methods were used to make a protein molecule with an unprecedented linear-loop polypeptide chain topology, and to characterize its X-ray structure.

Mandal, Kalyaneswar; Pentelute, Brad L.; Bang, Duhee; Gates, Zachary P.; Torbeev, Vladimir Yu.; Kent, Stephen B.H. (UC)

2012-02-10T23:59:59.000Z

364

A model of shape memory materials with hierarchical twinning: Statics and dynamics  

SciTech Connect

We consider a model of shape memory material in which hierarchical twinning near the habit plane (austenite-martensite interface) is a new and crucial ingredient. The model includes (1) a triple-well potential ({phi} model) in local shear strain, (2) strain gradient terms up to second order in strain and fourth order in gradient, and (3) all symmetry allowed compositional fluctuation induced strain gradient terms. The last term favors hierarchy which enables communication between macroscopic (cm) and microscopic ({Angstrom}) regions essential for shape memory. Hierarchy also stabilizes between formation (critical pattern of twins). External stress or pressure (pattern) modulates the spacing of domain walls. Therefore the ``pattern`` is encoded in the modulated hierarchical variation of the depth and width of the twins. This hierarchy of length scales provides a hierarchy of time scales and thus the possibility of non-exponential decay. The four processes of the complete shape memory cycle -- write, record, erase and recall -- are explained within this model. Preliminary results based on 2D Langevin dynamics are shown for tweed and hierarchy formation.

Saxena, A.; Bishop, A.R. [Los Alamos National Lab., NM (United States); Shenoy, S.R. [International Center for Theoretical Physics, Trieste (Italy); Wu, Y.; Lookman, T. [Western Ontario Univ., London, Ontario (Canada). Dept. of Applied Mathematics

1995-07-01T23:59:59.000Z

365

Hierarchical Neutrino Masses and Leptogenesis in Type I+II Seesaw Models  

E-Print Network (OSTI)

The baryon to photon ratio in the present Universe is very accurately measured to be $6.19 \\times 10^{-10}$. We study the possible origin of this baryon asymmetry in the neutrino sector through the generic mechanism of baryogenesis through leptogenesis. We consider both type I and type II seesaw origin of neutrino masses within the framework of left right symmetric models (LRSM). Using the latest best fit global neutrino oscillation data and assuming the Dirac neutrino mass matrix to be either charged lepton (CL) or up quark (UQ) type, we compute the predictions for baryon to photon ratio keeping the lightest active neutrino mass eigenstate a free parameter for both normal and inverted hierarchical cases. We show that in inverted hierarchical scenario with type I seesaw, observed baryon asymmetry can not be generated for both CL and UQ type Dirac neutrino mass matrices. We also study the predictions for baryon asymmetry when the neutrino masses arise from a combination of both type I and type II seesaw (with one of them dominant at a time) as well as different combinations of Majorana neutrino phases and show that the observed baryon asymmetry can be generated within these models upto certain exceptions.

Debasish Borah; Mrinal Kumar Das

2013-03-07T23:59:59.000Z

366

EVOLUTION OF THE VELOCITY-DISPERSION FUNCTION OF LUMINOUS RED GALAXIES: A HIERARCHICAL BAYESIAN MEASUREMENT  

SciTech Connect

We present a hierarchical Bayesian determination of the velocity-dispersion function of approximately 430,000 massive luminous red galaxies observed at relatively low spectroscopic signal-to-noise ratio (S/N {approx} 3-5 per 69 km s{sup -1}) by the Baryon Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky Survey III. We marginalize over spectroscopic redshift errors, and use the full velocity-dispersion likelihood function for each galaxy to make a self-consistent determination of the velocity-dispersion distribution parameters as a function of absolute magnitude and redshift, correcting as well for the effects of broadband magnitude errors on our binning. Parameterizing the distribution at each point in the luminosity-redshift plane with a log-normal form, we detect significant evolution in the width of the distribution toward higher intrinsic scatter at higher redshifts. Using a subset of deep re-observations of BOSS galaxies, we demonstrate that our distribution-parameter estimates are unbiased regardless of spectroscopic S/N. We also show through simulation that our method introduces no systematic parameter bias with redshift. We highlight the advantage of the hierarchical Bayesian method over frequentist 'stacking' of spectra, and illustrate how our measured distribution parameters can be adopted as informative priors for velocity-dispersion measurements from individual noisy spectra.

Shu Yiping; Bolton, Adam S.; Dawson, Kyle S.; Brownstein, Joel R. [Department of Physics and Astronomy, University of Utah, 115 South 1400 East, Salt Lake City, UT 84112 (United States); Schlegel, David J. [Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Wake, David A. [Department of Astronomy, Yale University, New Haven, CT 06520 (United States); Brinkmann, Jon [Apache Point Observatory, Apache Point Road, P.O. Box 59, Sunspot, NM 88349 (United States); Weaver, Benjamin A., E-mail: yiping.shu@utah.edu, E-mail: bolton@astro.utah.edu [Center for Cosmology and Particle Physics, New York University, NY 10003 (United States)

2012-04-15T23:59:59.000Z

367

Crystal Lattice Structures - TMS  

Science Conference Proceedings (OSTI)

Feb 7, 2007 ... This resource contains 273 common crystal lattice structures indexed by Strukturbericht designation, Pearson symbol, space group, prototype, ...

368

Meta-design: design for designers  

Science Conference Proceedings (OSTI)

One fundamental challenge for the design of the interactive systems of the future is to invent and design environments and cultures in which humans can express themselves and engage in personally meaningful activities. Unfortunately, a large number of ... Keywords: consumer and designer mindsets, designing “out of the box”, domain-oriented design environments, evolutionary growth, impact of new media on design, open evolvable systems, open source, reseeding model, seeding, underdesigned systems

Gerhard Fischer; Eric Scharff

2000-08-01T23:59:59.000Z

369

Hierarchical Disaster Image Classification for Situation Report Enhancement Yimin Yang, Hsin-Yu Ha, Fausto Fleites, Shu-Ching Chen, Steven Luis  

E-Print Network (OSTI)

response situations. The HDIC framework classifies images into different disaster categories and subHierarchical Disaster Image Classification for Situation Report Enhancement Yimin Yang, Hsin-Yu Ha In this paper, a hierarchical disaster image classification (HDIC) framework based on multi-source data fusion

Chen, Shu-Ching

370

Positive design  

Science Conference Proceedings (OSTI)

This article is focused on the changes needed in design to create positive solutions for all involved in design processes. It draws upon the rich discussion and discourse from a conference focused on positive design involving managers, designers, and ...

Jurgen Faust

2009-09-01T23:59:59.000Z

371

Alternative energy design toolkit  

E-Print Network (OSTI)

This thesis concerns the concepts, structure, and applications of the Alternative Energy Design Toolkit. The toolkit is aimed to provide a widely accessible, easy to use, flexible, yet powerful modeling environment for ...

Sukkasi, Sittha

2004-01-01T23:59:59.000Z

372

Prediction and Optimization of a Ceramic Casting Process Using A Hierarchical Hybrid System of Neural Networks and Fuzzy Logic  

E-Print Network (OSTI)

optimization for use in the ceramics industry. A prediction module estimates two quality metrics of slipPrediction and Optimization of a Ceramic Casting Process Using A Hierarchical Hybrid System)1 Department of Industrial and Systems Engineering Dunstan Hall Auburn University Auburn University

Smith, Alice E.

373

A top-down approach for compressing data cubes under the simultaneous evaluation of multiple hierarchical range queries  

Science Conference Proceedings (OSTI)

A novel top-down compression technique for data cubes is introduced and experimentally assessed in this paper. This technique considers the previously unrecognized case in which multiple Hierarchical Range Queries (HRQ), a very useful class ... Keywords: Advanced OLAP, Compressing data cubes under simultaneous multiple OLAP queries, Multi-objective compression of data cubes, Multiple-query data cube compression techniques

Alfredo Cuzzocrea

2010-06-01T23:59:59.000Z

374

CE 336 Introduction to Structural Engineering (formerly Structural Mechanics I)  

E-Print Network (OSTI)

structures using classical and matrix methods; introduction to analysis software, structural design concepts Structures Structural Loads Natural Hazards Structural Performance---Sensors---IT Safety and Risk Analysis to Matrix Methods Displacement Methods Analysis Software Dec. 1 Dec. 6 Introduction to Structural Design

375

Probing the black box : experiments in design and design education  

E-Print Network (OSTI)

Conventional analysis and design methods based on preexisting methods and assumptions preconditions and limits the designer's level of engagement with the specific context that is under investigation. A structural analysis ...

Mulvey, Christopher P. (Christopher Paul), 1975-

2000-01-01T23:59:59.000Z

376

A second gradient theoretical framework for hierarchical multiscale modeling of materials  

SciTech Connect

A theoretical framework for the hierarchical multiscale modeling of inelastic response of heterogeneous materials has been presented. Within this multiscale framework, the second gradient is used as a non local kinematic link between the response of a material point at the coarse scale and the response of a neighborhood of material points at the fine scale. Kinematic consistency between these scales results in specific requirements for constraints on the fluctuation field. The wryness tensor serves as a second-order measure of strain. The nature of the second-order strain induces anti-symmetry in the first order stress at the coarse scale. The multiscale ISV constitutive theory is couched in the coarse scale intermediate configuration, from which an important new concept in scale transitions emerges, namely scale invariance of dissipation. Finally, a strategy for developing meaningful kinematic ISVs and the proper free energy functions and evolution kinetics is presented.

Luscher, Darby J [Los Alamos National Laboratory; Bronkhorst, Curt A [Los Alamos National Laboratory; Mc Dowell, David L [GEORGIA TECH

2009-01-01T23:59:59.000Z

377

Materials Reliability Program: High-Strength Structural Bolting and Nickel-Base Alloy Components in B&W-Design Pressurized Water Rea ctor Internals (MRP-273)  

Science Conference Proceedings (OSTI)

This document summarizes information pertinent to the seven currently operating B&W-design 177-FA (fuel assembly) pressurized water reactors (PWRs) for the EPRI Materials Reliability Program (MRP).

2010-12-23T23:59:59.000Z

378

Architectural design for reliability  

DOE Green Energy (OSTI)

Design-for-reliability concepts can be applied to the products of the construction industry, which includes buildings, bridges, transportation systems, dams, and other structures. The application of a systems approach to designing in reliability emphasizes the importance of incorporating uncertainty in the analyses, the benefits of optimization analyses, and the importance of integrating reliability, safety, and security. 4 refs., 3 figs.

Cranwell, R.M.; Hunter, R.L.

1997-08-01T23:59:59.000Z

379

Hierarchical Diagnosis R. A. Kropfli, S. Y. Matrosov, T. Uttal, and B. W. Orr  

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

R. A. Kropfli, S. Y. Matrosov, T. Uttal, and B. W. Orr R. A. Kropfli, S. Y. Matrosov, T. Uttal, and B. W. Orr National Oceanic and Atmospheric Administration/Environmental Research Laboratories Wave Propagation Laboratory Boulder, CO 80303 I ntrod uction The WPL 8-mm wavelength radar was designed with good sensitivity and resolution to observe the small-scale structure and microphysical properties of clouds. DuringASTEX, for example, it observed, with 37-m resolution, all marine boundary layer (MBL) stratus and stratocumulus clouds within 5 km of the radar. More dense nonprecipitating clouds and very light drizzle were routinely observed to ranges exceeding 35 km. Characteristics of the radar are summarized in Table 1. A new offset Cassegrain antenna with good polarization performance is now being developed for this radar to study

380

Mathematical structure of unit systems  

E-Print Network (OSTI)

We investigate the mathematical structure of unit systems and the relations between them. Looking over the entire set of unit systems, we can find a mathematical structure that is called preorder (or quasi-order). For some pair of unit systems, there exists a relation of preorder such that one unit system is transferable to the other unit system. The transfer (or conversion) is possible only when all of the quantities distinguishable in the latter system are always distinguishable in the former system. By utilizing this structure, we can systematically compare the representations in different unit systems. Especially, the equivalence class of unit systems (EUS) plays an important role because the representations of physical quantities and equations are of the same form in unit systems belonging to an EUS. The dimension of quantities is uniquely defined in each EUS. The EUS's form a partially ordered set. Using these mathematical structures, unit systems and EUS's are systematically classified and organized as a hierarchical tree.

Masao Kitano

2013-05-04T23:59:59.000Z

Note: This page contains sample records for the topic "hierarchical structure designed" 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

Bio-inspired composites : a de novo approach to the conceptualization, design and synthesis of tough mesoscale structures with simple building blocks  

E-Print Network (OSTI)

Composites play an important role as structural materials in a range of engineering fields due to their potential to combine the best mechanical properties of their constituents. In biology, composites are ubiquitous and ...

Dimas, Leon Sokratis Scheie

2013-01-01T23:59:59.000Z

382

Material-based design computation  

E-Print Network (OSTI)

The institutionalized separation between form, structure and material, deeply embedded in modernist design theory, paralleled by a methodological partitioning between modeling, analysis and fabrication, resulted in ...

Oxman, Neri

2010-01-01T23:59:59.000Z

383

Hierarchical probing for estimating the trace of the matrix inverse on toroidal lattices  

E-Print Network (OSTI)

The standard approach for computing the trace of the inverse of a very large, sparse matrix $A$ is to view the trace as the mean value of matrix quadratures, and use the Monte Carlo algorithm to estimate it. This approach is heavily used in our motivating application of Lattice QCD. Often, the elements of $A^{-1}$ display certain decay properties away from the non zero structure of $A$, but random vectors cannot exploit this induced structure of $A^{-1}$. Probing is a technique that, given a sparsity pattern of $A$, discovers elements of $A$ through matrix-vector multiplications with specially designed vectors. In the case of $A^{-1}$, the pattern is obtained by distance-$k$ coloring of the graph of $A$. For sufficiently large $k$, the method produces accurate trace estimates but the cost of producing the colorings becomes prohibitively expensive. More importantly, it is difficult to search for an optimal $k$ value, since none of the work for prior choices of $k$ can be reused.

Andreas Stathopoulos; Jesse Laeuchli; Kostas Orginos

2013-02-17T23:59:59.000Z

384

Preliminary Structural Design Conceptualization for Composite Rotor for Verdant Power Water Current: Cooperative Research and Development Final Report, CRADA Number CRD-08-296  

DOE Green Energy (OSTI)

The primary thrust of the CRADA will be to develop a new rotor design that will allow higher current flows (>4m/s), greater swept area (6-11m), and in the process, will maximize performance and energy capture.

Hughes, S.

2011-02-01T23:59:59.000Z

385

Simulating intertwined design processes that have similar structures: a case study of a small company that creates made-to-order fashion products  

E-Print Network (OSTI)

of Product Development, Vol. 14, Nos. 1-4, pp. 118-143. (2011) DOI: 10.1504/IJPD.2011.042296 David C. Wynn* Cambridge University Engineering Department, Engineering Design Centre, Trumpington Street, Cambridge CB1 2RX, UK E-mail: dcw24@cam...

Wynn, David C; Eckert, Claudia M; Clarkson, P John

386

Design, Synthesis, and Estrogenic Activity of a Novel Estrogen Receptor ModulatorsA Hybrid Structure of 17 -Estradiol and Vitamin E in Hippocampal Neurons  

E-Print Network (OSTI)

Design, Synthesis, and Estrogenic Activity of a Novel Estrogen Receptor ModulatorsA Hybrid receptor (ER)-dependent proliferation in reproductive tissues, functions as an estrogenic agonist . In Vitro analyses demonstrated that 2 was neuroprotective and effective in activating molecular mechanisms

Brinton, Roberta Diaz

387

Shear wall experiments and design in Japan  

SciTech Connect

This paper summarizes the results of recent survey studies on the available experimental data bases and design codes/standards for reinforced concrete (RC) shear wall structures in Japan. Information related to the seismic design of RC reactor buildings and containment structures was emphasized in the survey. The seismic requirements for concrete structures, particularly those related to shear strength design, are outlined. Detailed descriptions are presented on the development of Japanese shear wall equations, design requirements for containment structures, and ductility requirements.

Park, Y.J.; Hofmayer, C.

1994-12-01T23:59:59.000Z

388

Assessing the Response of Snow Avalanche Runout Altitudes to Climate Fluctuations Using Hierarchical Modeling: Application to 61 Winters of Data in France  

Science Conference Proceedings (OSTI)

Snow avalanches are natural hazards strongly controlled by the mountain winter climate, but their recent response to climate change has thus far been poorly documented. In this paper, hierarchical modeling is used to obtain robust indexes of the ...

N. Eckert; H. Baya; M. Deschatres

2010-06-01T23:59:59.000Z

389

A Torus-Based Hierarchical Optical-Electronic Network-on-Chip for Multiprocessor System-on-Chip  

Science Conference Proceedings (OSTI)

Networks-on-chip (NoCs) are emerging as a key on-chip communication architecture for multiprocessor systems-on-chip (MPSoCs). Optical communication technologies are introduced to NoCs in order to empower ultra-high bandwidth with low power consumption. ... Keywords: Hierarchical architecture, multiprocessor system-on-chip, optical network-on-chip, optical-electronic router, power consumption

Yaoyao Ye; Jiang Xu; Xiaowen Wu; Wei Zhang; Weichen Liu; Mahdi Nikdast

2012-02-01T23:59:59.000Z

390

Preliminary Design and Cost Structure of a 50-kW Polymer Electrolyte Membrane Fuel Cell (PEMFC) System for Stationary Applications  

Science Conference Proceedings (OSTI)

There is a growing interest in using Polymer Electrolyte Membrane Fuel Cell (PEMFC) technology in commercial on-site power and co-generation systems. However, little quantitative information is available on such factors as cost structure, size/weight characteristics, and cost/performance tradeoffs. This report both updates and refines results of prior studies to provide a more quantitative basis for developing a program that supports sound product strategy and business decisions.

1998-12-31T23:59:59.000Z

391

An addressing independent networking structure favorable for all-optical packet switching  

Science Conference Proceedings (OSTI)

All-optical packet switching (AOPS) technology is essential to fully utilize the tremendous bandwidth provided by advanced optical communication techniques through forwarding packets in optical domain for the next generation network. However, long packet ... Keywords: addressing transparency, all-optical packet switching (AOPS), hierarchical source routing, networking structure

Shengming Jiang

2007-01-01T23:59:59.000Z

392

Bayesian hierarchical models for soil CO{sub 2} flux and leak detection at geologic sequestration sites  

Science Conference Proceedings (OSTI)

Proper characterizations of background soil CO{sub 2} respiration rates are critical for interpreting CO{sub 2} leakage monitoring results at geologic sequestration sites. In this paper, a method is developed for determining temperature-dependent critical values of soil CO{sub 2} flux for preliminary leak detection inference. The method is illustrated using surface CO{sub 2} flux measurements obtained from the AmeriFlux network fit with alternative models for the soil CO{sub 2} flux versus soil temperature relationship. The models are fit first to determine pooled parameter estimates across the sites, then using a Bayesian hierarchical method to obtain both global and site-specific parameter estimates. Model comparisons are made using the deviance information criterion (DIC), which considers both goodness of fit and model complexity. The hierarchical models consistently outperform the corresponding pooled models, demonstrating the need for site-specific data and estimates when determining relationships for background soil respiration. A hierarchical model that relates the square root of the CO{sub 2} flux to a quadratic function of soil temperature is found to provide the best fit for the AmeriFlux sites among the models tested. This model also yields effective prediction intervals, consistent with the upper envelope of the flux data across the modeled sites and temperature ranges. Calculation of upper prediction intervals using the proposed method can provide a basis for setting critical values in CO{sub 2} leak detection monitoring at sequestration sites.

Yang, Ya-Mei; Small, Mitchell J.; Junker, Brian; Bromhal, Grant S.; Strazisar, Brian; Wells, Arthur

2011-10-01T23:59:59.000Z

393

Performance Characterization of a Hierarchical MPI Implementations on Large-scale Distributed-memory Platforms  

SciTech Connect

The building blocks of emerging Petascale massively parallel processing (MPP) systems are multi-core processors with four or more cores as a single processing element and a customized network interface. The resulting memory and communication hierarchy of these platforms are now exposed to application developers and end users by creating a hierarchical or multi-core aware message-passing (MPI) programming interface and by providing a handful of runtime, tunable parameters that allows mapping and control of MPI tasks and message handling. We characterize performance of MPI communication patterns and present strategies for optimizing applications performance on Cray XT series systems that are composed of contemporary AMD processors and a proprietary network infrastructure. We highlight dependencies in its memory and network subsystems, which could influence production-level applications performance. We demonstrate that MPI micro-benchmarks could mislead an application developer or end user since these benchmarks often do not expose the interplay between memory allocation and usage in the user space, which depends on the number of tasks or cores and workload characteristics. Our studies show performance improvements compared to the default options for our target scientific benchmarks and production-level applications.

Alam, Sadaf R [ORNL; Barrett, Richard F [ORNL; Kuehn, Jeffery A [ORNL; Poole, Stephen W [ORNL

2009-01-01T23:59:59.000Z

394

A hierarchical framework for coupling surface fluxes to atompsheric general circulation models: The homogeneity test  

SciTech Connect

The atmosphere and the biosphere are inherently coupled to one another. Atmospheric surface state variables such as temperature, winds, water vapor, precipitation, and radiation control biophysical, biogeochemical, and ecological processes at the surface and subsurface. At the same time, surface fluxes of momentum, moisture, heat, and trace gases act as time-dependent boundary conditions providing feedback on atmospheric processes. To understand such phenomena, a coupled set of interactive models is required. Costs are still prohibitive for computing surface/subsurface fluxes directly for medium-resolution atmospheric general circulation models (AGCMs), but a technique has been developed for testing large-scale homogeneity and accessing surface parameterizations and models to reduce this computational cost and maintain accuracy. This modeling system potentially bridges the observed spatial and temporal ranges yet allows the incorporation of necessary details about individual ecological community types or biomes and simulates the net momentum, heat, moisture, and trace gas fluxes. This suite of coupled models is defined here as the hierarchical systems flux scheme (HSFS).

Miller, N.L.

1993-01-01T23:59:59.000Z

395

Massive, red galaxies in a hierarchical universe I. Counts of Extremely Red Objects and basic properties  

E-Print Network (OSTI)

We present predictions for the abundance and nature of Extremely Red Objects (EROs) in the Lambda cold dark matter model. EROs are red, massive galaxies observed at z>= 1 and their numbers and properties pose a challenge to hierarchical galaxy formation models. We compare the predictions from two published models, one of which invokes a "superwind" to regulate star formation in massive haloes and the other which suppresses gas cooling in haloes through "radio-mode" AGN feedback. The superwind model underestimates the number counts of EROs by an order of magnitude, whereas the radio-mode AGN feedback model gives excellent agreement with the number counts and redshift distribution of EROs. In the AGN feedback model the ERO population is dominated by old, passively evolving galaxies, whereas observations favour an equal split between old galaxies and dusty starbursts. Also, the model predicts a more extended redshift distribution of passive galaxies than is observed. These comparisons suggest that star formation may be quenched too efficiently in this model.

V. Gonzalez-Perez; C. M. Baugh; C. G. Lacey; C. Almeida

2008-11-13T23:59:59.000Z

396

Resource conservation through a hierarchical approach of mass and energy integration  

E-Print Network (OSTI)

The objective of this work was to develop a systematic methodology for simultaneously targeting and optimizing heating, cooling, power cogeneration, and waste management for any processing facility. A systems approach was used to characterize the complex interactions between the various forms of material and energy utilities as well as their interactions with the core processing units. Two approaches were developed: graphical and mathematical. In both approaches, a hierarchical procedure was developed to decompose the problem into successive stages that were globally solvable then. The solution fragments were then merged into overall process solutions and targets. The whole approach was a systems approach of solving problems. The methodology was developed from the insights from several state of the art process integration techniques. In particular, the dissertation introduced a consistent framework for simultaneously addressing heat-exchange networks, material-recovery networks, combined heat and power, fuel optimization, and waste management. The graphical approach relied on decomposing the problem into sequential tasks that could be addressed using visualization tools. The mathematical approach enabled the simultaneous solution of critical subproblems. Because of the non-convexity of the mathematical formulation, a global optimization technique was developed through problem reformulation and discretization. A case study was solved and analyzed to illustrate the effectiveness of the devised methodology.

Mahmud, Rubayat

2005-12-01T23:59:59.000Z

397

A Predictive Model of Fragmentation using Adaptive Mesh Refinement and a Hierarchical Material Model  

Science Conference Proceedings (OSTI)

Fragmentation is a fundamental material process that naturally spans spatial scales from microscopic to macroscopic. We developed a mathematical framework using an innovative combination of hierarchical material modeling (HMM) and adaptive mesh refinement (AMR) to connect the continuum to microstructural regimes. This framework has been implemented in a new multi-physics, multi-scale, 3D simulation code, NIF ALE-AMR. New multi-material volume fraction and interface reconstruction algorithms were developed for this new code, which is leading the world effort in hydrodynamic simulations that combine AMR with ALE (Arbitrary Lagrangian-Eulerian) techniques. The interface reconstruction algorithm is also used to produce fragments following material failure. In general, the material strength and failure models have history vector components that must be advected along with other properties of the mesh during remap stage of the ALE hydrodynamics. The fragmentation models are validated against an electromagnetically driven expanding ring experiment and dedicated laser-based fragmentation experiments conducted at the Jupiter Laser Facility. As part of the exit plan, the NIF ALE-AMR code was applied to a number of fragmentation problems of interest to the National Ignition Facility (NIF). One example shows the added benefit of multi-material ALE-AMR that relaxes the requirement that material boundaries must be along mesh boundaries.

Koniges, A E; Masters, N D; Fisher, A C; Anderson, R W; Eder, D C; Benson, D; Kaiser, T B; Gunney, B T; Wang, P; Maddox, B R; Hansen, J F; Kalantar, D H; Dixit, P; Jarmakani, H; Meyers, M A

2009-03-03T23:59:59.000Z

398

Structuring of Large-scale Complex Hybrid Systems: from Illustrative Analysis toward Modelization  

Science Conference Proceedings (OSTI)

System structuring is paramount to the development of large-scale complex hybrid systems (LCHS). However, there is no well-established and effective methodology for the structuring of LCHS. Using the approach of illustrating and abstracting, this paper ... Keywords: autonomous system, block-diagram-based model, distributed system, hierarchical system, large-scale complex hybrid system (LCHS), multiple gradation, nested system, nesting, perception–decision link, system geometry, system modelization, system structuring

Huaglory Tianfield

2001-02-01T23:59:59.000Z

399

NREL: Computational Science - Inverse Design  

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

Inverse Design Inverse Design The NREL Computational Science Center collaborates with the High Throughput and Inverse Band Structure (HT/IBS) Group within the Center for Inverse Design (CID) to research, design, and create materials with given target properties. The Center for Inverse Design is an Energy Frontier Research Center of the U.S. Department of Energy Office of Science. To address a crucial scientific grand challenge, the Center is pursuing a new approach to material science. Rather than using the conventional direct approach ("Given the structure, find the electronic properties"), we are using a "materials by inverse design" approach ("Given the desired property, find the structure"). Illustration of a blue arrow pointing to a graphic with three curved lines that represent an electronic structure and blue arrow pointing to a red and blue balls that represent an atomic configuration.

400

An efficient scheme for data aggregation with star-graph hierarchical clustering structure in wireless sensor networks  

Science Conference Proceedings (OSTI)

Collecting state-based data from a network of sensors in large-scale deployment wireless sensor networks environment and aggregating those data through prominent sensors necessitate efficient organization of the network topology for the purpose of balancing ... Keywords: aggregation, pre-deployment, wireless sensor networks

Tung-Shih Su; Wen-Shyong Hsieh

2007-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "hierarchical structure designed" 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

Photovoltaic Cell Structures  

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

The actual structural design of a photovoltaic (PV), or solar cell, depends on the limitations of the material used in the PV cell. The four basic device designs are:

402

Graphite design handbook  

Science Conference Proceedings (OSTI)

The objectives of the Graphite Design Handbook (GDH) are to provide and maintain a single source of graphite properties and phenomenological model of mechanical behavior to be used for design of MHTGR graphite components of the Reactor System, namely, core support, permanent side reflector, hexagonal reflector elements, and prismatic fuel elements; to provide a single source of data and material models for use in MHTGR graphite component design, performance, and safety analyses; to present properties and equations representing material models in a form which can be directly used by the designer or analyst without the need for interpretation and is compatible with analytical methods and structural criteria used in the MHTGR project, and to control the properties and material models used in the MHTGR design and analysis to proper Quality Assurance standards and project requirements. The reference graphite in the reactor internal components is the nuclear grade 2020. There are two subgrades of interest, the cylinder nuclear grade and the large rectangular nuclear grade. The large rectangular nuclear grade is molded in large rectangular blocks. It is the reference material for the permanent side reflector and the central column support structure. The cylindrical nuclear grade is isostatically pressed and is intended for use as the core support component. This report gives the design properties for both H-451 and 2020 graphite as they apply to their respective criteria. The properties are presented in a form for design, performance, and safety calculations that define or validate the component design. 103 refs., 20 figs., 19 tabs.

Ho, F.H.

1988-09-01T23:59:59.000Z

403

Experimental design  

Science Conference Proceedings (OSTI)

Maximizing data information requires careful selection, termed design, of the points at which data are observed. Experimental design is reviewed here for broad classes of data collection and analysis problems, including: fractioning techniques ... Keywords: Key Design Issues in Data Mining, Science and Technology, Statistical Fundamentals

J. P. Morgan; Xinwei Deng

2012-03-01T23:59:59.000Z

404

Designing Creativity  

E-Print Network (OSTI)

Is it possible to design for creativity? This is one of the most important research questions in AI and Design. This paper raises the question whether automated software agent design can be creative. Not only is the artefact dynamic in the sense that it adapts to its environment, it is also autonomous: an agent decides on its own when to be modified and by whom. An agent's functionality may evolve beyond the expectations of its designers and/or users resulting in very new, unique artefacts. Is this type of design creative? Is the process creative? The result? 1.

Frances M. T. Brazier; Niek J. E. Wijngaards

2002-01-01T23:59:59.000Z

405

A hierarchical analysis of terrestrial ecosystem model Biome-BGC: Equilibrium analysis and model calibration  

Science Conference Proceedings (OSTI)

The increasing complexity of ecosystem models represents a major difficulty in tuning model parameters and analyzing simulated results. To address this problem, this study develops a hierarchical scheme that simplifies the Biome-BGC model into three functionally cascaded tiers and analyzes them sequentially. The first-tier model focuses on leaf-level ecophysiological processes; it simulates evapotranspiration and photosynthesis with prescribed leaf area index (LAI). The restriction on LAI is then lifted in the following two model tiers, which analyze how carbon and nitrogen is cycled at the whole-plant level (the second tier) and in all litter/soil pools (the third tier) to dynamically support the prescribed canopy. In particular, this study analyzes the steady state of these two model tiers by a set of equilibrium equations that are derived from Biome-BGC algorithms and are based on the principle of mass balance. Instead of spinning-up the model for thousands of climate years, these equations are able to estimate carbon/nitrogen stocks and fluxes of the target (steady-state) ecosystem directly from the results obtained by the first-tier model. The model hierarchy is examined with model experiments at four AmeriFlux sites. The results indicate that the proposed scheme can effectively calibrate Biome-BGC to simulate observed fluxes of evapotranspiration and photosynthesis; and the carbon/nitrogen stocks estimated by the equilibrium analysis approach are highly consistent with the results of model simulations. Therefore, the scheme developed in this study may serve as a practical guide to calibrate/analyze Biome-BGC; it also provides an efficient way to solve the problem of model spin-up, especially for applications over large regions. The same methodology may help analyze other similar ecosystem models as well.

Thornton, Peter E [ORNL; Wang, Weile [ORNL; Law, Beverly E. [Oregon State University; Nemani, Ramakrishna R [NASA Ames Research Center

2009-01-01T23:59:59.000Z

406

Traceability and Modularity in Software Design  

Science Conference Proceedings (OSTI)

A software design specification consists of a number of documents that describe various aspect of the design at different levels of detail, that are linked in many ways. This paper shows how different designs may use different modularization criteria, ... Keywords: traceability, modularity, structured design, object-oriented design

R. J. Wieringa

1998-04-01T23:59:59.000Z

407

Application of an automated wireless structural monitoring system for long-span suspension bridges  

SciTech Connect

This paper describes an automated wireless structural monitoring system installed at the New Carquinez Bridge (NCB). The designed system utilizes a dense network of wireless sensors installed in the bridge but remotely controlled by a hierarchically designed cyber-environment. The early efforts have included performance verification of a dense network of wireless sensors installed on the bridge and the establishment of a cellular gateway to the system for remote access from the internet. Acceleration of the main bridge span was the primary focus of the initial field deployment of the wireless monitoring system. An additional focus of the study is on ensuring wireless sensors can survive for long periods without human intervention. Toward this end, the life-expectancy of the wireless sensors has been enhanced by embedding efficient power management schemes in the sensors while integrating solar panels for power harvesting. The dynamic characteristics of the NCB under daily traffic and wind loads were extracted from the vibration response of the bridge deck and towers. These results have been compared to a high-fidelity finite element model of the bridge.

Kurata, M.; Lynch, J. P. [Department of Civil and Environ. Eng., University of Michigan, Ann Arbor, MI 48105 (United States); Linden, G. W. van der [SC Solutions, Sunnyvale, CA 94085 (United States); Hipley, P.; Sheng, L.-H. [California Department of Transportation (Caltrans), Sacramento, CA 95816 (United States)

2011-06-23T23:59:59.000Z

408

USANS: the Ultra-Small-Angle Neutron Scattering Instrument at...  

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

USANS-Ultra-Small-Angle Neutron Scattering Instrument USANS is designed for the study of hierarchical structures in natural and artificial materials. It can be considered an...

409

Nanostructured 3-D Architectures | Argonne National Laboratory  

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

materials can be achieved by capitalizing on the hierarchical design of 3-dimensional nano-lattices. Such structural metamaterials exhibit superior thermomechanical properties at...

410

STANDARD DESIGN CRITERIA  

DOE Patents (OSTI)

Hanford Atomic Production Operation specification gaides for design criteria, structural engineering, civil engineering, heating, ventilation, air conditioning, fire alarm systems, noise control, lighting, railroad construction, corrosion protection, and electrical engineering are presented. Details of this manual are given in TID-4100 (Suppl.). (N.W.R.)

None

1963-01-01T23:59:59.000Z

411

DUST SPECTRAL ENERGY DISTRIBUTIONS IN THE ERA OF HERSCHEL AND PLANCK: A HIERARCHICAL BAYESIAN-FITTING TECHNIQUE  

SciTech Connect

We present a hierarchical Bayesian method for fitting infrared spectral energy distributions (SEDs) of dust emission to observed fluxes. Under the standard assumption of optically thin single temperature (T) sources, the dust SED as represented by a power-law-modified blackbody is subject to a strong degeneracy between T and the spectral index {beta}. The traditional non-hierarchical approaches, typically based on {chi}{sup 2} minimization, are severely limited by this degeneracy, as it produces an artificial anti-correlation between T and {beta} even with modest levels of observational noise. The hierarchical Bayesian method rigorously and self-consistently treats measurement uncertainties, including calibration and noise, resulting in more precise SED fits. As a result, the Bayesian fits do not produce any spurious anti-correlations between the SED parameters due to measurement uncertainty. We demonstrate that the Bayesian method is substantially more accurate than the {chi}{sup 2} fit in recovering the SED parameters, as well as the correlations between them. As an illustration, we apply our method to Herschel and submillimeter ground-based observations of the star-forming Bok globule CB244. This source is a small, nearby molecular cloud containing a single low-mass protostar and a starless core. We find that T and {beta} are weakly positively correlated-in contradiction with the {chi}{sup 2} fits, which indicate a T-{beta} anti-correlation from the same data set. Additionally, in comparison to the {chi}{sup 2} fits the Bayesian SED parameter estimates exhibit a reduced range in values.

Kelly, Brandon C.; Goodman, Alyssa A. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Shetty, Rahul [Zentrum fuer Astronomie der Universitaet Heidelberg, Institut fuer Theoretische Astrophysik, Albert-Ueberle-Str. 2, 69120 Heidelberg (Germany); Stutz, Amelia M.; Launhardt, Ralf [Max Planck Institut fuer Astronomie, Koenigstuhl 17, 69117 Heidelberg (Germany); Kauffmann, Jens [NASA JPL, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States)

2012-06-10T23:59:59.000Z

412

Design Specifications  

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

Design Design Specifications Services Overview ECS Audio/Video Conferencing Fasterdata IPv6 Network Network Performance Tools (perfSONAR) ESnet OID Registry PGP Key Service Virtual Circuits (OSCARS) OSCARS Case Study Documentation User Manual FAQ Design Specifications Functional Specifications Notifications Publications Authorization Policy Default Attributes Message Security Clients For Developers Interfaces Links Hardware Requirements DOE Grids Service Transition Contact Us Technical Assistance: 1 800-33-ESnet (Inside the US) 1 800-333-7638 (Inside the US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: trouble@es.net Provide Web Site Feedback: info@es.net Design Specifications OSCARS Reservation Manager - Design Specifications Year 3 Update (DRAFT) David Robertson, Chin Guok

413

Learning-based ship design optimization approach  

Science Conference Proceedings (OSTI)

With the development of computer applications in ship design, optimization, as a powerful approach, has been widely used in the design and analysis process. However, the running time, which often varies from several weeks to months in the current computing ... Keywords: Machine learning, Multi-objective optimization, Ship design, Structure analysis, Structure optimization

Hao Cui; Osman Turan; Philip Sayer

2012-03-01T23:59:59.000Z

414

Integrated design : a generative multi-performative design approach  

E-Print Network (OSTI)

There are building systems, called "modularized", in which the component systems (for structure, lighting, etc) can be analyzed and synthesized independently since their performance and design do not interact or affect one ...

Fasoulaki, Eleftheria

2008-01-01T23:59:59.000Z

415

Engitectural Design  

E-Print Network (OSTI)

Traditionally, Architecture and Engineering have been disciplines practiced exclusive of one another's input and collaboration. This seemingly awkward custom is due in part to tradition and to the two distinct perspectives each discipline has concerning the function of a building and it's many components. In the past, collaboration on a project generally occurred out of necessity, and can usually be attributed to a system and design integration problems. In most instances, these issues are related to the mechanical systems of building, and in a hot and humid climate the issues are magnified. Therefore, this paper will discuss the concepts and merits of a new design process called: Engitectural Design. Engitectural Design is the concept of blending the many design and aesthetic concerns of architecture with the more technical aspects of engineering, especially in the area of mechanical HVAC systems. The use of this new design procedure will reduce, if not eliminate, current problems with clearances, mechanical room size and optimal area selection. Merely incorporating the mechanical needs of a building during the schematic phase will reduce communication problems that cause the above mentioned problems, and thus optimize the system. This paper will address the mutual concerns of both professions as it pertains to materials, lighting, surface finishes, passive and active solar and the use of landscaping, focusing on the benefits of mutual agreement in a hot and humid climate. To be successful, the collaboration must begin in pre-design and continue through project completion. During initial implementation of Engitectural Design, a fm can expect each phase of a project to take longer than usual. Lack of established relationships, poor communication and professional territorial rights will exist in the beginning. However, over time a fm can expect a time reduction due to fewer revisions and the elimination of duplicated work. As it pertains to today's more advanced HVAC systems, this new cooperation and understanding of the needs within disciplines will yield a more effective and efficient operating unit for today's hot and humid environment.

Gagliardi, D. R.

1996-01-01T23:59:59.000Z

416

PL FINAL DESIGN REPORT. VOLUME I. PLANT DESIGN  

SciTech Connect

The plant design for PL-2, a 1000-kw net electric direct cycle boiling water nuclear power plant, is presented. The design includes all buildings, foundations, and structures required for the installation of the plant in a snow tunnel. (M.C.G.)

1961-06-30T23:59:59.000Z

417

Fire Protection of Structural Steel in High-Rise Buildings  

Science Conference Proceedings (OSTI)

... for Structural Fire Safety Design and Retrofit of Structures ... products or gypsum with a light weight aggregate ... in both cost and time savings in design ...

2005-04-29T23:59:59.000Z

418

Shape exploration of designs in a style: Toward generation of product designs  

Science Conference Proceedings (OSTI)

Generative specifications have been used to systematically codify established styles in several design fields including architecture and product design. We examine how designers explore new designs in the early stages of product development as they manipulate ... Keywords: Decomposition, Exploration, Product Design, Shape Rule, Structure

M. Prats; C. Earl; S. Garner; I. Jowers

2006-06-01T23:59:59.000Z

419

Component-oriented decomposition for multidisciplinary design optimization in building design  

Science Conference Proceedings (OSTI)

The potential of Multidisciplinary Design Optimization (MDO) is not sufficiently exploited in current building design practice. I argue that this field of engineering requires a special setup of the optimization model that considers the uniqueness of ... Keywords: Building-design-specific decomposition, Design structure matrix (DSM), Interactive CAD, Multidisciplinary design optimization (MDO), Preference criteria

Philipp Geyer

2009-01-01T23:59:59.000Z

420

Hierarchically Blocked Algorithms and Optimized Kernels for Dense Matrix Computations on Memory-Tiered  

E-Print Network (OSTI)

Data Structures [1] E. Elmroth, F. Gustavson, I. Jonsson, and B. Kågström. Recursive Blocked Algorithms and Hybrid Data Structures for Dense Matrix Library Software. SIAM Review, 46(1):3­45, 2004. [2] R. Granat, I-Tiered High-Performance Computing Systems Publications 2002­2009 within the VR project This version: 2010

Kågström, Bo

Note: This page contains sample records for the topic "hierarchical structure designed" 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

Systems/Component Design, Engineering and Drafting - Nuclear...  

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

Drafting Capabilities Engineering Computation and Design Engineering and Structural Mechanics SystemsComponent Design, Engineering and Drafting Heat Transfer and Fluid Mechanics...

422

Transmission Line Design and Construction  

Science Conference Proceedings (OSTI)

The power industry wants to construct reliable and cost-effective overhead lines. A reliable and cost effective line requires not only that the line and structures meet design criteria for strength, clearances, and electrical considerations, but also that it be designed for safe and easy construction and maintenance. Design and construction practices should therefore go hand in hand. Information among various departments within a utility has to be shared for mutual benefit. Communication is a key ...

2012-12-31T23:59:59.000Z

423

Design and Construction of Structural Systems  

Science Conference Proceedings (OSTI)

... greater than those required by the Code for office areas without storage. ... Also, the Code requires that exterior exposed frames, arches, or shells be ...

424

APPENDIX T – STRUCTURAL DESIGN FOR FIRE ...  

Science Conference Proceedings (OSTI)

... Idealized uniform reflected pressure & impulse ? Breaching analysis ... Based on uniform pressure loading ... Gravity + 25% Live Load ...

425

Design of Flywheel Energy Storage Structure  

Science Conference Proceedings (OSTI)

In this paper, we have mainly studied the flywheel energy storage system's construction and working principle, which include flywheel battery, integrated driven converting motor (Device of energy converter), and magnetic suspension support system. We ... Keywords: Flywheel principle, Flywheel energy storage, Energy transudcer, Application of flywheel storage

Baoquan Geng; Yiming He

2011-03-01T23:59:59.000Z

426

ICME: Linking Microstructure to Structural Design Requirements  

Science Conference Proceedings (OSTI)

Organizer(s), Rajiv S. Mishra, University of North Texas David Ulrich Furrer, Pratt & Whitney Peter Collins, University of North Texas Charles H. Ward, Air Force ...

427

Catalysis-by-design impacts assessment  

SciTech Connect

Catalyst researchers have always recognized the need to develop a detailed understanding of the mechanisms of catalytic processes, and have hoped that it would lead to developing a theoretical predictive base to guide the search for new catalysts. This understanding allows one to develop a set of hierarchical models, from fundamental atomic-level ab-initio models to detailed engineering simulations of reactor systems, to direct the search for optimized, efficient catalyst systems. During the last two decades, the explosions of advanced surface analysis techniques have helped considerably to develop the building blocks for understanding various catalytic reactions. An effort to couple these theoretical and experimental advances to develop a set of hierarchical models to predict the nature of catalytic materials is a program entitled Catalysis-by-Design (CRD).'' In assessing the potential impacts of CBD on US industry, the key point to remember is that the value of the program lies in developing a novel methodology to search for new catalyst systems. Industrial researchers can then use this methodology to develop proprietary catalysts. Most companies involved in catalyst R D have two types of ongoing projects. The first type, what we call market-driven R D,'' are projects that support and improve upon a company's existing product lines. Project of the second type, technology-driven R D,'' are longer term, involve the development of totally new catalysts, and are initiated through scientists' research ideas. The CBD approach will impact both types of projects. However, this analysis indicates that the near-term impacts will be on market-driven'' projects. The conclusions and recommendations presented in this report were obtained by the authors through personal interviews with individuals involved in a variety of industrial catalyst development programs and through the three CBD workshops held in the summer of 1989. 34 refs., 7 figs., 7 tabs.

Fassbender, L L; Young, J K [Pacific Northwest Lab., Richland, WA (USA); Sen, R K [Sen (R.K.) and Associates, Washington, DC (USA)

1991-05-01T23:59:59.000Z

428

Examples of Analyses [Engineering and Structural Mechanics] ...  

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

Analyses Capabilities Engineering Computation and Design Engineering and Structural Mechanics Overview Areas of Application Examples of Analyses SystemsComponent Design,...

429

Space design  

Science Conference Proceedings (OSTI)

Space stations, Moon bases and Mars bases are artificial habitats intended to support human life in extreme conditions. Their purpose is to pursue human progress and to gain knowledge and experience of the environment surrounding our planet. This research ... Keywords: Human factors, Interior design, Space habitability, Sustainability, Vision

Irene Lia Schlacht; Henrik Birke

2011-06-01T23:59:59.000Z

430

Numerical design optimisation for the Karoo Array Telescope.  

E-Print Network (OSTI)

??Although mass minimisation is an important application within structural optimisation, other applications include: (1) concept generation, (2) concept evaluation, (3) design for structural feasibility and… (more)

Joubert, N. J. D.

2009-01-01T23:59:59.000Z

431

Photovoltaic Incentive Design Handbook  

DOE Green Energy (OSTI)

Investments in customer-owned grid-connected photovoltaic (PV) energy systems are growing at a steady pace. This is due, in part, to the availability of attractive economic incentives offered by public state agencies and utilities. In the United States, these incentives have largely been upfront lump payments tied to the system capacity rating. While capacity-based ''buydowns'' have stimulated the domestic PV market, they have been criticized for subsidizing systems with potentially poor energy performance. As a result, the industry has been forced to consider alternative incentive structures, particularly ones that pay based on long-term measured performance. The industry, however, lacks consensus in the debate over the tradeoffs between upfront incentive payments versus longer-term payments for energy delivery. This handbook is designed for agencies and utilities that offer or intend to offer incentive programs for customer-owned PV systems. Its purpose is to help select, design, and implement incentive programs that best meet programmatic goals. The handbook begins with a discussion of the various available incentive structures and then provides qualitative and quantitative tools necessary to design the most appropriate incentive structure. It concludes with program administration considerations.

Hoff, T. E.

2006-12-01T23:59:59.000Z

432

Generalized Nuclear Data: A New Structure (with Supporting Infrastructure) for Handling Nuclear Data  

SciTech Connect

The Evaluated Nuclear Data File (ENDF) format was designed in the 1960s to accommodate neutron reaction data to support nuclear engineering applications in power, national security and criticality safety. Over the years, the scope of the format has been extended to handle many other kinds of data including charged particle, decay, atomic, photo-nuclear and thermal neutron scattering. Although ENDF has wide acceptance and support for many data types, its limited support for correlated particle emission, limited numeric precision, and general lack of extensibility mean that the nuclear data community cannot take advantage of many emerging opportunities. More generally, the ENDF format provides an unfriendly environment that makes it difficult for new data evaluators and users to create and access nuclear data. The Cross Section Evaluation Working Group (CSEWG) has begun the design of a new Generalized Nuclear Data (or 'GND') structure, meant to replace older formats with a hierarchy that mirrors the underlying physics, and is aligned with modern coding and database practices. In support of this new structure, Lawrence Livermore National Laboratory (LLNL) has updated its nuclear data/reactions management package Fudge to handle GND structured nuclear data. Fudge provides tools for converting both the latest ENDF format (ENDF-6) and the LLNL Evaluated Nuclear Data Library (ENDL) format to and from GND, as well as for visualizing, modifying and processing (i.e., converting evaluated nuclear data into a form more suitable to transport codes) GND structured nuclear data. GND defines the structure needed for storing nuclear data evaluations and the type of data that needs to be stored. But unlike ENDF and ENDL, GND does not define how the data are to be stored in a file. Currently, Fudge writes the structured GND data to a file using the eXtensible Markup Language (XML), as it is ASCII based and can be viewed with any text editor. XML is a meta-language, meaning that it has a primitive set of definitions for representing hierarchical data/text in a file. Other meta-languages, like HDF5 which stores the data in binary form, can also be used to store GND in a file. In this paper, we will present an overview of the new GND data structures along with associated tools in Fudge.

Mattoon, C.M. [Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore CA (United States)] [Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore CA (United States); Beck, B.R.; Patel, N.R.; Summers, N.C.; Hedstrom, G.W. [Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore CA (United States)] [Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore CA (United States); Brown, D.A. [National Nuclear Data Center, Upton NY (United States)] [National Nuclear Data Center, Upton NY (United States)

2012-12-15T23:59:59.000Z

433

An error-free data collection method exploiting hierarchical physical models of wireless sensor networks  

Science Conference Proceedings (OSTI)

Various studies have shown that a substantial portion of the data gathered in real-world sensing applications is faulty. Most existing fault-detection approaches are off-line, centralised, and rely heavily on expert domain knowledge which may not always ... Keywords: adaptive design, physical model, robust learning, stationarity of sensor data

Lei Fang, Simon Dobson, Danny Hudges

2013-11-01T23:59:59.000Z

434

NREL: Water Power Research - Design Review and Analysis  

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

activities include mechanical design, hydrodynamics, structural dynamics, advanced controls, model development, grid integration, and instrumentation and testing. Read about...

435

FRASH: Exploiting storage class memory in hybrid file system for hierarchical storage  

Science Conference Proceedings (OSTI)

In this work, we develop a novel hybrid file system, FRASH, for storage-class memory and NAND Flash. Despite the promising physical characteristics of storage-class memory, its scale is an order of magnitude smaller than the current storage device scale. ... Keywords: Flash storage, log-structured file system

Jaemin Jung; Youjip Won; Eunki Kim; Hyungjong Shin; Byeonggil Jeon

2010-03-01T23:59:59.000Z

436

Computation of Hierarchical Transition Systems to Document Refined Event-B Models  

E-Print Network (OSTI)

the specification. More recently, some participants of the POS�7 project have proposed to used GénéSyst to manage from the abstract representa- tion, while substates are introduced to precise some refined behavioursBuffer > 0. Moreover, the use of hier- archy allows to structure the diagram by choosing initial- substates

Paris-Sud XI, Université de

437

Mechanical Design  

SciTech Connect

The particle beam of the SXR (soft x-ray) beam line in the LCLS (Linac Coherent Light Source) has a high intensity in order to penetrate through samples at the atomic level. However, the intensity is so high that many experiments fail because of severe damage. To correct this issue, attenuators are put into the beam line to reduce this intensity to a level suitable for experimentation. Attenuation is defined as 'the gradual loss in intensity of any flux through a medium' by [1]. It is found that Beryllium and Boron Carbide can survive the intensity of the beam. At very thin films, both of these materials work very well as filters for reducing the beam intensity. Using a total of 12 filters, the first 9 being made of Beryllium and the rest made of Boron Carbide, the beam's energy range of photons can be attenuated between 800 eV and 9000 eV. The design of the filters allows attenuation for different beam intensities so that experiments can obtain different intensities from the beam if desired. The step of attenuation varies, but is relative to the thickness of the filter as a power function of 2. A relationship for this is f(n) = x{sub 0}2{sup n} where n is the step of attenuation desired and x{sub 0} is the initial thickness of the material. To allow for this desired variation, a mechanism must be designed within the test chamber. This is visualized using a 3D computer aided design modeling tool known as Solid Edge.

2010-08-25T23:59:59.000Z

438

Structural alphabet motif discovery and a structural motif database  

Science Conference Proceedings (OSTI)

This study proposes a general framework for structural motif discovery. The framework is based on a modular design in which the system components can be modified or replaced independently to increase its applicability to various studies. It is a two-stage ... Keywords: Motif-finding tools, Protein structures, Sequence motifs, Structural alphabets, Structural motifs

Shih-Yen Ku; Yuh-Jyh Hu

2012-01-01T23:59:59.000Z

439

System 80+{trademark} Standard Design: CESSAR design certification. Volume 3: Amendment I  

SciTech Connect

This report, entitled Combustion Engineering Standard Safety Analysis Report - Design Certification (CESSAR-DC), has been prepared in support of the industry effort to standardize nuclear plant designs. These documents describe the Combustion Engineering, Inc. System 80+{sup TM} Standard Design. This report, Volume 3, in conjunction with Volume 2, provides the design of structures, components, equipment and systems.

Not Available

1990-12-21T23:59:59.000Z

440

System 80+{trademark} Standard Design: CESSAR design certification. Volume 2: Amendment I  

SciTech Connect

This report, entitled Combustion Engineering Standard Safety Analysis Report - Design Certification (CESSAR-DC), has been prepared in support of the industry effort to standardize nuclear plant designs. These documents describe the Combustion Engineering, Inc. System 80+{sup TM} Standard Design. This report, Volume 2, in conjunction with Volume 3, provides the design of structures, components, equipment and systems.

Not Available

1990-12-21T23:59:59.000Z

Note: This page contains sample records for the topic "hierarchical structure designed" 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

Molecular Organization in the Native State of Wood Cell Walls: Studies of Nanoscale Structure and its Development  

DOE Green Energy (OSTI)

With respect to cell wall biogenesis we have developed a theory concerning the formation of lignin in which the regulation of structure is attributed to the hemicelluloses; they are viewed as templates for the assembly of lignin. The key supporting evidence is derived from the symmetry of annual rings in trees free of reaction wood. This symmetry is interpreted to point to genetic encoding as the dominant factor in the pattern of interunit linkages in lignin. More recently, we have explored further the implications of annual ring symmetries within the contexts of systems and information theory and theories of organization of hierarchic structures. This has led us to proposed a unifying model for cell wall biogenesis that comprehends cell wall polysaccharides as well as lignin. The model is based on examining the implications of symmetries and of hierarchic relationships between different levels of structure, with respect to synchrony and coordination of the stages of formation of the individual constituents.

Atalla, R. H.

2001-02-01T23:59:59.000Z

442

A Swiss Study on the WTC Collapse for Improving Design and ...  

Science Conference Proceedings (OSTI)

... Expec ted life cycle benefit Decision variables Reconstruction strategy, decommissioning, replacement Structural design Inspection & maintenance ...

2012-04-10T23:59:59.000Z

443

Eccentric rf deflecting structure  

SciTech Connect

For superconducting rf separators, assembled by electron beam welding techniques, two types of mode stabilizers are discussed: the elliptical structure, and a new design called the eccentric structure''. For an operating pi /2 or pi mode in the lower pass band, it is shown that the various parameters of the eccentric structure can be adjusted to provide the required frequency spacing between the operating mode and the upper dispersion curve. (auth)

Aggus, J.R.; Giordano, S.; Halama, H.J.

1973-12-13T23:59:59.000Z

444

data structure  

Science Conference Proceedings (OSTI)

Definition of data structure, possibly with links to more information and implementations. NIST. data structure. (definition). ...

2013-11-08T23:59:59.000Z

445

An understanding of multiscale mechanics of hierarchical carobn based materials is desired to enable the design of novel materials possessing superior mechanical  

E-Print Network (OSTI)

. More recently a novel method of in situ SEM peeling between two SWNT bundles was used to measure of these interfaces include shell-shell interac- tions in MWNTs, tube-tube interactions in close-packed CNT bundles of a MWNT being pulled out of an outer tube of shells in a reversible process. Without measuring the pull

Espinosa, Horacio D.

446

Design Scenarios: Enabling transparent parametric design spaces  

Science Conference Proceedings (OSTI)

This paper presents a novel methodology called Design Scenarios (DSs) intended for use in conceptual design of buildings. DS enables multidisciplinary design teams to streamline the requirements definition, alternative generation, analysis, and decision-making ... Keywords: Conceptual design, Design spaces, Ontology, Parametric modeling, Process mapping, Requirements modeling

Victor Gane; John Haymaker

2012-08-01T23:59:59.000Z

447

Cold Dark Matter Substructure and Galactic Disks I: Morphological Signatures of Hierarchical Satellite Accretion  

E-Print Network (OSTI)

(Abridged) We conduct a series of high-resolution, dissipationless N-body simulations to investigate the cumulative effect of substructure mergers onto thin disk galaxies in the context of the LCDM paradigm of structure formation. Our simulation campaign is based on a hybrid approach. Substructure properties are culled directly from cosmological simulations of galaxy-sized cold dark matter (CDM) halos. In contrast to what can be inferred from statistics of the present-day substructure populations, accretions of massive subhalos onto the central regions of host halos, where the galactic disk resides, since z~1 should be common occurrences. One host halo merger history is subsequently used to seed controlled numerical experiments of repeated satellite impacts on an initially-thin Milky Way-type disk galaxy. We show that these accretion events produce several distinctive observational signatures in the stellar disk including: a ring-like feature in the outskirts; a significant flare; a central bar; and faint fil...

Kazantzidis, Stelios; Zentner, Andrew R; Kravtsov, Andrey V; Moustakas, Leonidas A

2007-01-01T23:59:59.000Z

448

Shell structures for biogas plants  

Science Conference Proceedings (OSTI)

The shell structures designed for biogas plants of the fixed-dome type by the Bremen Overseas Research and Development Association are described. Biogas digesters of the design described have been successfully tested in Rwanda and India without structural or contractural problems.

Sasse, L.

1982-01-01T23:59:59.000Z

449

High-performance solution of hierarchical equations of motions for studying energy-transfer in light-harvesting complexes  

E-Print Network (OSTI)

Excitonic models of light-harvesting complexes, where the vibrational degrees of freedom are treated as a bath, are commonly used to describe the motion of the electronic excitation through a molecule. Recent experiments point toward the possibility of memory effects in this process and require to consider time non-local propagation techniques. The hierarchical equations of motion (HEOM) were proposed by Ishizaki and Fleming to describe the site-dependent reorganization dynamics of protein environments (J. Chem. Phys., 130, p. 234111, 2009), which plays a significant role in photosynthetic electronic energy transfer. HEOM are often used as a reference for other approximate methods, but have been implemented only for small systems due to their adverse computational scaling with the system size. Here, we show that HEOM are also solvable for larger systems, since the underlying algorithm is ideally suited for the usage of graphics processing units (GPU). The tremendous reduction in computational time due to the GPU allows us to perform a systematic study of the energy-transfer efficiency in the Fenna-Matthews-Olson (FMO) light-harvesting complex at physiological temperature under full consideration of memory-effects. We find that approximative methods differ qualitatively and quantitatively from the HEOM results and discuss the importance of finite temperature to achieve high energy-transfer efficiencies.

Christoph Kreisbeck; Tobias Kramer; Mirta Rodriguez; Birgit Hein

2010-12-20T23:59:59.000Z

450

Detecting extreme mass ratio inspiral events in LISA data using the Hierarchical Algorithm for Clusters and Ridges (HACR)  

E-Print Network (OSTI)

One of the most exciting prospects for the Laser Interferometer Space Antenna (LISA) is the detection of gravitational waves from the inspirals of stellar-mass compact objects into supermassive black holes. Detection of these sources is an extremely challenging computational problem due to the large parameter space and low amplitude of the signals. However, recent work has suggested that the nearest extreme mass ratio inspiral (EMRI) events will be sufficiently loud that they might be detected using computationally cheap, template-free techniques, such as a time-frequency analysis. In this paper, we examine a particular time-frequency algorithm, the Hierarchical Algorithm for Clusters and Ridges (HACR). This algorithm searches for clusters in a power map and uses the properties of those clusters to identify signals in the data. We find that HACR applied to the raw spectrogram performs poorly, but when the data is binned during the construction of the spectrogram, the algorithm can detect typical EMRI events at distances of up to $\\sim2.6$Gpc. This is a little further than the simple Excess Power method that has been considered previously. We discuss the HACR algorithm, including tuning for single and multiple sources, and illustrate its performance for detection of typical EMRI events, and other likely LISA sources, such as white dwarf binaries and supermassive black hole mergers. We also discuss how HACR cluster properties could be used for parameter extraction.

Jonathan R Gair; Gareth Jones

2006-10-10T23:59:59.000Z

451

Giant Ringlike Radio Structures Around Galaxy Cluster Abell 3376  

E-Print Network (OSTI)

In the current paradigm of cold dark matter cosmology, large-scale structures are assembling through hierarchical clustering of matter. In this process, an important role is played by megaparsec (Mpc)-scale cosmic shock waves, arising in gravity-driven supersonic flows of intergalactic matter onto dark matter-dominated collapsing structures such as pancakes, filaments, and clusters of galaxies. Here, we report Very Large Array telescope observations of giant (~2 Mpc by 1.6 Mpc), ring-shaped nonthermal radio-emitting structures, found at the outskirts of the rich cluster of galaxies Abell 3376. These structures may trace the elusive shock waves of cosmological large-scale matter flows, which are energetic enough to power them. These radio sources may also be the acceleration sites where magnetic shocks are possibly boosting cosmic-ray particles with energies of up to 10^18 to 10^19 electron volts.

Joydeep Bagchi; Florence Durret; Gastao B. Lima Neto; Surajit Paul

2006-11-09T23:59:59.000Z

452

ISG8-Structures  

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

Structures (WG4) Structures (WG4) Orange Rm H. Carter, T. Higo and J. Wang Parallel Sessions: Working Groups: WG1: Parameters, Design, Instrumentation and Tuning WG2: Damping Rings and ATF WG3: RF Sources WG4:Structures WG5: Ground Motion; Site Requirements and Investigations Goals Review of progress and experiences in design and fabrication. Review of high gradient tests. R&D plan and schedule through spring of 2003. Plan and schedule for production of 8-pack structures. Plan and schedule to document how to manufacture and process NLC/JLC accelerator structures. Preliminary Agenda Monday 9:00 Plenary 10:30 Coffee Break 11:00 – 12:00 Working Group Organization Opening Remarks - Dave Burke, Ron Ruth, Nobu Toge Discussion: Agenda and working group organization Lunch 13:30 – 15:30 High Gradient Test (Joint session with WG3)

453

Hierarchical Growth and Cosmic Star Formation: Enrichment, Outflows and Supernova Rates  

E-Print Network (OSTI)

The cosmic star formation histories are evaluated for different minimum masses of the initial halo structures, with allowance for realistic gas outflows. With a minimum halo mass of 10^{7} - 10^{8} M_odot and a moderate outflow efficiency, we reproduce both the current baryon fraction and the early chemical enrichment of the IGM. The intensity of the formation rate of ``normal'' stars is also well constrained by the observations: it has to be dominated by star formation in elliptical galaxies, except perhaps at very low redshift. The fraction of baryons in stars is predicted as are also the type Ia and II supernova event rates. Comparison with SN observations in the redshift range z=0-2 allows us to set strong constraints on the time delay of type Ia supernovae (a total delay of \\sim 4 Gyr is required to fit the data), the lower end of the mass range of the progenitors (2 - 8 M_odot) and the fraction of white dwarfs that reproduce the type Ia supernova (about 1 per cent). The intensity in the initial starburst of zero metallicity stars below 270 M_\\odot must be limited in order to avoid premature overenrichment of the IGM. Only about 10 - 20 % of the metals present in the IGM at z = 0 have been produced by population III stars at very high z. The remaining 80 - 90 % are ejected later by galaxies forming normal stars, with a maximum outflow efficiency occurring at a redshift of about 5. We conclude that 10^{-3} of the mass in baryons must lie in first massive stars in order to produce enough ionizing photons to allow early reionization of the IGM by z \\sim 15.

Frederic Daigne; Keith A. Olive; Joe Silk; Felix Stoehr; Elisabeth Vangioni

2005-09-07T23:59:59.000Z

454

Clustering of Galaxies in a Hierarchical Universe: III. Mock Redshift Surveys  

E-Print Network (OSTI)

This is the third paper in a series which combines N-body simulations and semi-analytic modelling to provide a fully spatially resolved simulation of the galaxy formation and clustering processes. Here we extract mock redshift surveys from our simulations: a Cold Dark Matter model with either Omega_0=1 (tauCDM) or Omega_0=0.3 and Lambda=0.7 (LambdaCDM). We compare the mock catalogues with the northern region (CfA2N) of the Center for Astrophysics (CfA) Redshift Surveys. We study the properties of galaxy groups and clusters identified using standard observational techniques and we study the relation of these groups to real virialised systems. Most features of CfA2N groups are reproduced quite well by both models with no obvious dependence on Omega_0. Redshift space correlations and pairwise velocities are also similar in the two cosmologies. The luminosity functions predicted by our galaxy formation models depend sensitively on the treatment of star formation and feedback. For the particular choices of Paper I they agree poorly with the CfA survey. To isolate the effect of this discrepancy on our mock redshift surveys, we modify galaxy luminosities in our simulations to reproduce the CfA luminosity function exactly. This adjustment improves agreement with the observed abundance of groups, which depends primarily on the galaxy luminosity density, but other statistics, connected more closely with the underlying mass distribution, remain unaffected. Regardless of the luminosity function adopted, modest differences with observation remain. These can be attributed to the presence of the ``Great Wall'' in the CfA2N. It is unclear whether the greater coherence of the real structure is a result of cosmic variance, given the relatively small region studied, or reflects a physical deficiency of the models.

Antonaldo Diaferio; Guinevere Kauffmann; Joerg M. Colberg; Simon D. M. White

1998-12-01T23:59:59.000Z

455

Tutorial Design Windows - CECM  

E-Print Network (OSTI)

Tutorial Design Windows: Activity 2: Activity 2 Design Window Return to tutorial. Exercise 1: Exercise 1 Design Window Return to exercises. Exercise 2: Exercise  ...

456

APS Preliminary Beamline Design Report Guide  

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

PRELIMINARY BEAMLINE DESIGN REPORT PRELIMINARY BEAMLINE DESIGN REPORT December 5, 1994 5.1 Preliminary Beamline Design: General Guidelines The Preliminary Design of the beamline represents an approximately 30% design level of each of the beamline components. This level of design permits the CAT to develop cost estimates for the construction of the beamline, as well as a realistic timeline for completion of the construction tasks. A committee from the APS has been charged with reviewing the Preliminary Design Reports and has established the evaluation criteria described below. The Preliminary Beamline Report is expected to expand upon the Conceptual Design Report in the following areas: Beamline Layout Component Design Work Breakdown Structure Cost and Schedule Additional Operational Requirements

457

The Fluid Mechanics of Gravitational Structure Formation  

E-Print Network (OSTI)

The standard model for gravitational structure formation in astrophysics, astronomy, and cosmology is questioned. Cold dark matter (CDM) hierarchical clustering cosmology neglects particle collisions, viscosity, turbulence and diffusion and makes predictions in conflict with observations. From Jeans 1902 and CDMHC, the non-baryonic dark matter NBDM forms small clumps during the plasma epoch after the big bang that ``cluster'' into larger clumps. CDM halo clusters collect the baryonic matter (H and He) by gravity so that after 300 Myr of ``dark ages'', huge, explosive (Population III) first stars appear, and then galaxies and galaxy clusters. Contrary to CDMHC cosmology, ``hydro-gravitational-dynamics'' HGD cosmology suggests the diffusive NBDM material cannot clump and the clumps cannot cluster. From HGD, the big bang results from an exothermic turbulent instability at Planck scales (10^{-35} m). Turbulent stresses cause an inflation of space and fossil density turbulence remnants that trigger gravitational i...

Gibson, C H

2006-01-01T23:59:59.000Z

458

Simplicity in interaction design  

Science Conference Proceedings (OSTI)

Attaining simplicity is a key challenge in interaction design. Our approach relies on a minimalist design exercise to explore the communication capacity for interaction components. This approach results in expressive design solutions, useful perspectives ... Keywords: expressiveness, interface design, simplicity, usability

Angela Chang; James Gouldstone; Jamie Zigelbaum; Hiroshi Ishii

2007-02-01T23:59:59.000Z

459

Design review report for multiport riser final design review  

DOE Green Energy (OSTI)

This design review examined the design documents contained in a notebook prepared for the final design review of the multiport riser assembly. This assembly will support the Hydrogen Mitigation Test program for mitigation of safety issues for Hanford Waste Tank 241-SY-101. The purpose of the Multiport Riser is to provide multiple access ports of several diameters in a single 42 inch riser for simultaneous access of test and support equipment. The notebook was titled: {open_quotes}Multiport Riser Final Design Review.{close_quotes} The review was conducted using a database comment registration system whereby the reviewer comments were entered into the database and each comment was given a unique identifier. During the review, each comment was referred to by its identifier. Changes to comments, responses, and actions needed were made with the agreement of the committee and the reviewers at the formal design review meeting held March 1, 1994. When the structural analyses were available, they were distributed for review which allowed closure of all design review comments. Approval of the design was achieved and supporting documents are included in this report.

McWethy, L.M.; Sheen, E.M.

1994-05-01T23:59:59.000Z

460

Standardized Cost Structure for the Environmental Industry  

Science Conference Proceedings (OSTI)

The underlying key to developing successful estimates, tracking project costs, and utilizing historical project cost information is the development of standardized and well-defined hierarchical listing of cost categories. Committees within the U.S. Federal agencies have pioneered efforts toward developing the Environmental Cost Element Structure (ECES), which is key in achieving these goals. The ECES was developed using an iterative process with input from federal agencies and industry. Experts from several disciplines participated including engineers, cost estimators, project/program managers, and contract personnel. The ECES benefits from an intense analytical effort, the knowledge gained from the maturation of the environmental industry, and incorporation of past user's experiences. Building upon this foundation, the E06 committee of the ASTM International has now fully developed and published a standard (ASTM 2150-04) that provides standardized cost categories with complete cost category definitions. This standard affords environmental and nuclear D and D project managers the opportunity to have a well defined hierarchical listing of their estimates and actual costs, readily adapted to performing summations and roll-ups, supported by a multi-level dictionary specifically defining the content of the cost elements as well as the summations. Owing to the dynamic nature of the environmental technologies, efforts need to be made to continue to update this standard by adding new technologies and methods as they are developed and employed in the field. Lastly, the Environmental Cost Element Structure that is embodied in this standard also presents opportunities to develop historical cost databases and comprehensive life cycle cost estimates and standardized cost estimating tools. (authors)

Skokan, B.; Melamed, D.; Guevara, K. [US DOE, Office of Project Planning and Controls, EM-32, 1000 Independence Ave. SW, Washington, DC 20585 (United States); Mallick, P. [US DOE, Office of Performance Assessment, EM-43, 1000 Independence Ave. SW, Washington, DC 20585 (United States); Bierman, G. [Legin Group, Inc., P.O. Box 3788, Gaithersburg, MD 20885-3788 (United States); Marshall, H.E. [Building and Fire Research Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Stop 8603, Gaithersburg, MD 20899-8603 (United States)

2006-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "hierarchical structure designed" from the National Library of EnergyBeta (NLEBeta).
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461

Multiscale materials design of natural exoskeletons : fish armor  

E-Print Network (OSTI)

Biological materials have developed hierarchical and heterogeneous material nanostructures and microstructures to provide protection against various environmental threats that, in turn, provide bioinspired clues to man-made, ...

Song, Juha

2011-01-01T23:59:59.000Z

462

Designing Environmentally Safe Refrigerants Using Mathematical Programming  

E-Print Network (OSTI)

Computer aided molecular design is a strategy in which a set of structural groups are systematically combined to form molecules with desired properties. In this paper, a mathematical programming based approach to computer aided molecular design is presented. Using a set of structural groups, the problem is formulated as a mixed integer nonlinear program in which discrete variables represent the number of each type of structural groups present in the candidate compound. The augmentedpenalty /outer-approximation algorithm is used to solve the MINLP to obtain compound(s) with an optimum value of an appropriate performance index such that molecular structural constraints, physical property constraints and process design limitations are met. With the current renewed interest in the environment, the suggested approach is applied to refrigerant design with an environmental constraint. The results indicate the viability of this approach. INTRODUCTION The chemical industry is constantly explo...

Amit P. Duvedi; Luke E. K. Achenie; Copyright Amit Duvedi; Luke Achenie

1996-01-01T23:59:59.000Z

463

MAS.961 Designing Sociable Media, Spring 2001  

E-Print Network (OSTI)

This course is about social life in the on-line world. Its focus is on how the design of the interface influences people's interactions with each other and shapes the cultural mores and structures they develop. We will ...

Donath, Judith S.

464

Combinatorial Designs for Authentication and Secrecy Codes  

Science Conference Proceedings (OSTI)

Combinatorial design theory is a very active area of mathematical research, with many applications in communications and information theory, computer science, statistics, engineering, and life sciences. As one of the fundamental discrete structures, ...

Michael Huber

2010-06-01T23:59:59.000Z

465

Comments Sought on NIST Guidelines for Structural Fire ...  

Science Conference Proceedings (OSTI)

... by NIST that involved experts in the design and construction industry and academia ... design as well as the evaluation of concrete and steel structures ...

2011-12-02T23:59:59.000Z

466

An expert system for window glazing design  

SciTech Connect

An integrated expert system was developed to facilitate the design of window glass for structural strength, hydrostatic loads, sound attenuation, and solar control. The integrated software consists of a text-based interface, a rule-based expert system, and two neural networks. The text of a glazing design guide is linked by related topics and concepts. The software's design feature lets the user enter design parameters for the window choice via an interactive consultation in to a rule-based expert system that critiques the design. The technical aspects of the glass's structural strength are based primarily on linear methods published by the American Architectural Manufacturers Association Statistical correlations for the new nonlinear failure prediction for glass strength are used to automatically design for the minimum glass thickness required to withstand a specified load. Neural networks estimate values for sound attenuation and solar transmission characteristics from laboratory test data on selected glass constructions.

Foss, R.V. (E.I. duPont de Nemours and Co., Parkersburg, WV (US)); Droste, D.H.

1990-01-01T23:59:59.000Z

467

Market Design Test Environments  

SciTech Connect

Power industry restructuring continues to evolve at multiple levels of system operations. At the bulk electricity level, several organizations charged with regional system operation are implementing versions of a Wholesale Power Market Platform (WPMP) in response to U.S. Federal Energy Regulatory Commission initiatives. Recently the Energy Policy Act of 2005 and several regional initiatives have been pressing the integration of demand response as a resource for system operations. These policy and regulatory pressures are driving the exploration of new market designs at the wholesale and retail levels. The complex interplay among structural conditions, market protocols, and learning behaviors in relation to short-term and longer-term market performance demand a flexible computational environment where designs can be tested and sensitivities to power system and market rule changes can be explored. This paper presents the use of agent-based computational methods in the study of electricity markets at the wholesale and retail levels, and distinctions in problem formulation between these levels.

Widergren, Steven E.; Sun, Junjie; Tesfatsion, Leigh

2006-06-18T23:59:59.000Z

468

A method to expose the hidden structure of Fortran programs  

Science Conference Proceedings (OSTI)

Program structure is inherent in program design; therefore special keywords such as "if... then ... else” or "do ... while” ... Keywords: Flow graph, Reducibility, Structured programming

Loren P. Meissner

1974-01-01T23:59:59.000Z

469

A Quantitative Study of Robustness Characteristics in Steel Framed Structures.  

E-Print Network (OSTI)

??Robustness is a desirable property in any structural design. Robustness may be thought of as the building's inherent structural ability to resist loads other than… (more)

Raebel, Christopher Herman

2011-01-01T23:59:59.000Z

470

Proof-Based design of security protocols  

Science Conference Proceedings (OSTI)

We consider the refinement-based process for the development of security protocols. Our approach is based on the Event B refinement, which makes proofs easier and which makes the design process faithfull to the structure of the protocol as the designer ...

Nazim Benaissa; Dominique Méry

2010-06-01T23:59:59.000Z

471

User interface design with matrix algebra  

Science Conference Proceedings (OSTI)

It is usually very hard, both for designers and users, to reason reliably about user interfaces. This article shows that 'push button' and 'point and click' user interfaces are algebraic structures. Users effectively do algebra when they interact, and ... Keywords: Matrix algebra, feature interaction, usability analysis, user interface design

Harold Thimbleby

2004-06-01T23:59:59.000Z

472

Improving Multi-Agent Architectural Design  

Science Conference Proceedings (OSTI)

Agents provide developers with a flexible way to structure systems around autonomous, communicating elements. To support the efficient development of such systems, design techniques need to be introduced. In this context, we propose an extension of the ... Keywords: Architectural Design, Multi-Agent Systems

Carla Silva; Jaelson Castro; Patrícia Tedesco; João Araújo; Ana Moreira; John Mylopoulos

2007-02-01T23:59:59.000Z

473

The design and retrofit of buildings for resistance to blast-induced progressive collapse.  

E-Print Network (OSTI)

??In recent years, concern has risen drastically regarding the suitability of structural design for blast resistance. Historic events have proven that buildings that are designed… (more)

Abbott Galvão Sobreira Lopes, Isabel

2009-01-01T23:59:59.000Z

474

Hierarchical probabilistic regionalization of volcanism for Sengan region in Japan using multivariate statistical techniques and geostatistical interpolation techniques.  

DOE Green Energy (OSTI)

Sandia National Laboratories, under contract to Nuclear Waste Management Organization of Japan (NUMO), is performing research on regional classification of given sites in Japan with respect to potential volcanic disruption using multivariate statistics and geo-statistical interpolation techniques. This report provides results obtained for hierarchical probabilistic regionalization of volcanism for the Sengan region in Japan by applying multivariate statistical techniques and geostatistical interpolation techniques on the geologic data provided by NUMO. A workshop report produced in September 2003 by Sandia National Laboratories (Arnold et al., 2003) on volcanism lists a set of most important geologic variables as well as some secondary information related to volcanism. Geologic data extracted for the Sengan region in Japan from the data provided by NUMO revealed that data are not available at the same locations for all the important geologic variables. In other words, the geologic variable vectors were found to be incomplete spatially. However, it is necessary to have complete geologic variable vectors to perform multivariate statistical analyses. As a first step towards constructing complete geologic variable vectors, the Universal Transverse Mercator (UTM) zone 54 projected coordinate system and a 1 km square regular grid system were selected. The data available for each geologic variable on a geographic coordinate system were transferred to the aforementioned grid system. Also the recorded data on volcanic activity for Sengan region were produced on the same grid system. Each geologic variable map was compared with the recorded volcanic activity map to determine the geologic variables that are most important for volcanism. In the regionalized classification procedure, this step is known as the variable selection step. The following variables were determined as most important for volcanism: geothermal gradient, groundwater temperature, heat discharge, groundwater pH value, presence of volcanic rocks and presence of hydrothermal alteration. Data available for each of these important geologic variables were used to perform directional variogram modeling and kriging to estimate values for each variable at 23949 centers of the chosen 1 km cell grid system that represents the Sengan region. These values formed complete geologic variable vectors at each of the 23,949 one km cell centers.

Park, Jinyong (University of Arizona, Tucson, AZ); Balasingham, P. (University of Arizona, Tucson, AZ); McKenna, Sean Andrew; Kulatilake, Pinnaduwa H. S. W. (University of Arizona, Tucson, AZ)