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Note: This page contains sample records for the topic "quality noise traffic" 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.


1

Effects of Repeated Compost Topdressing Applications on Turfgrass Quality on Athletic Turf under Traffic.  

E-Print Network (OSTI)

??Moderately maintained soil/native-based sports fields with intensive use, usually present poor soil nutrient status, excessive traffic, and low turfgrass cover. Currently, there is little information… (more)

Munoz, Marcela Paz

2011-01-01T23:59:59.000Z

2

Environmental resources of selected areas of Hawaii: Climate, ambient air quality, and noise  

DOE Green Energy (OSTI)

This report has been prepared to make available and archive background scientific data and related information on climate, ambient air quality, and ambient noise levels collected during the preparation of the environmental impact statement (EIS) for Phases 3 and 4 of the Hawaii Geothermal Project (HGP) as defined by the state of Hawaii in its April 1989 proposal to Congress. The US Department of Energy (DOE) published a notice withdrawing its Notice of Intent to prepare the HGP-EIS. Since the state of Hawaii is no longer pursuing or planning to pursue the HGP, DOE considers the project to be terminated. The report presents a general description of the climate add air quality for the islands of Hawaii (henceforth referred to as Hawaii), Maui and Oahu. It also presents a literature review as baseline information on the health effects of sulfide. The scientific background data and related information is being made available for use by others in conducting future scientific research in these areas. This report describes the environmental resources present in the areas studied (i.e., the affected environment) and does not represent an assessment of environmental impacts.

Lombardi, D.A.; Blasing, T.J.; Easterly, C.E.; Reed, R.M. [Oak Ridge National Lab., TN (United States); Hamilton, C.B. [Univ. of Tennessee, Knoxville, TN (United States)

1995-03-01T23:59:59.000Z

3

2001: An Airspace Odyssey SUMMARY PROCEEDINGS OF THE 2001 AIRPORT NOISE SYMPOSIUM AND AIRPORT AIR QUALITY SYMPOSIUM  

E-Print Network (OSTI)

the use of advanced fan blade design and low noise fan exitreduce compressor fan noise, and the design of the nacelle

Gosling, Geoffrey D.

2001-01-01T23:59:59.000Z

4

Particle swarm optimization applied to vertical traffic scheduling in buildings  

Science Conference Proceedings (OSTI)

Vertical traffic scheduling is significant in evaluating the quality of property management. An excellent vertical traffic scheduling approach aims at enhancing the system handling capacity and reducing the waiting time, journey time and energy consumption, ... Keywords: dynamic zoning, elevator group control system, particle swarm optimization, round-trip time, vertical traffic scheduling

Zhonghua Li; Hong-Zhou Tan; Yunong Zhang

2007-09-01T23:59:59.000Z

5

Quality Control of Surface Wave Data Estimated from Low Signal-to-Noise Ratio HF Radar Doppler Spectra  

Science Conference Proceedings (OSTI)

Ocean wave spectra estimated by high-frequency (HF) radar are very sensitive to the noise of Doppler spectra. The method for estimating wave spectra has been improved. This method is a nonlinear inversion and can be applied to a single radar case ...

Yukiharu Hisaki

2009-11-01T23:59:59.000Z

6

Traffic Engineering and QoS Optimization of Integrated Voice & Data Networks  

Science Conference Proceedings (OSTI)

This book describes, analyzes, and recommends traffic engineering (TE) and quality of service (QoS) optimization methods for integrated voice/data dynamic routing networks. These functions control a network's response to traffic demands and other stimuli, ... Keywords: Networking

Gerald R. Ash

2006-10-01T23:59:59.000Z

7

Getting Traffic Lights Talking to Improve Topeka's Traffic Tunnel |  

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

Getting Traffic Lights Talking to Improve Topeka's Traffic Tunnel Getting Traffic Lights Talking to Improve Topeka's Traffic Tunnel Getting Traffic Lights Talking to Improve Topeka's Traffic Tunnel October 8, 2010 - 11:16am Addthis Topeka is using Recovery Act funding to resynchronize 22 traffic lights. | Photo by Linda Voss Topeka is using Recovery Act funding to resynchronize 22 traffic lights. | Photo by Linda Voss Lindsay Gsell The five-lane 21st street corridor in Topeka is a hub for restaurants, shopping and entertainment. "This is where everyone in Topeka goes to shop," says Topeka resident Linda Voss. In addition to food and fun, the one-mile corridor is home to seven traffic lights-and for drivers, a potential traffic stop every 754 feet, or a little more than two football fields. "The traffic signals are a challenge to time in this area," says Voss,

8

Airborne Traffic Flow Data and Traffic Management  

E-Print Network (OSTI)

. N. Johnson (1928), "Maryland Aerial Survey of Highway Traffic Between Baltimore and Washington-lane highway between Baltimore and Washington #12;atlas Johnson's Aerial Photography Source: Johnson (1928) #12 it could well be that aerial photographs will prove comparatively cheap" (p. 297). B. D. Greenshields (1947

Bertini, Robert L.

9

Traffic Toll of Wildlife  

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

which continues to increase. The first study of this traffic hazard was made by W. P. Flint of the Illinois Natural History Survey. He kept year-round records during 1930, 1931...

10

Streamlining Transportation Corridor Planning Processess: Freight and Traffic Information  

SciTech Connect

The traffic investigation is one of the most important parts of an Environmental Impact Statement of projects involving the construction of new roadway facilities and/or the improvement of existing ones. The focus of the traffic analysis is on the determination of anticipated traffic flow characteristics of the proposed project, by the application of analytical methods that can be grouped under the umbrella of capacity analysis methodologies. In general, the main traffic parameter used in EISs to describe the quality of traffic flow is the Level of Service (LOS). The current state of the practice in terms of the traffic investigations for EISs has two main shortcomings. The first one is related to the information that is necessary to conduct the traffic analysis, and specifically to the lack of integration among the different transportation models and the sources of information that, in general, reside in GIS databases. A discussion of the benefits of integrating CRS&SI technologies and the transportation models used in the EIS traffic investigation is included. The second shortcoming is in the presentation of the results, both in terms of the appearance and formatting, as well as content. The presentation of traffic results (current and proposed) is discussed. This chapter also addresses the need of additional data, in terms of content and coverage. Regarding the former, other traffic parameters (e.g., delays) that are more meaningful to non-transportation experts than LOS, as well as additional information (e.g., freight flows) that can impact traffic conditions and safety are discussed. Spatial information technologies can decrease the negative effects of, and even eliminate, these shortcomings by making the relevant information that is input to the models more complete and readily available, and by providing the means to communicate the results in a more clear and efficient manner. The benefits that the application and use of CRS&SI technologies can provide to improve and expedite the traffic investigation part of the EIS process are presented.

Franzese, Oscar [ORNL

2010-08-01T23:59:59.000Z

11

Analysis of airspace traffic structure and air traffic control techniques  

E-Print Network (OSTI)

Air traffic controller cognitive processes are a limiting factor in providing safe and efficient flow of traffic. Therefore, there has been work in understanding the factors that drive controllers decision-making processes. ...

De Albuquerque Filho, Emilio Alverne Falcão

2012-01-01T23:59:59.000Z

12

Structural analysis of network traffic flows  

Science Conference Proceedings (OSTI)

Network traffic arises from the superposition of Origin-Destination (OD) flows. Hence, a thorough understanding of OD flows is essential for modeling network traffic, and for addressing a wide variety of problems including traffic engineering, traffic ... Keywords: network traffic analysis, principal component analysis, traffic engineering

Anukool Lakhina; Konstantina Papagiannaki; Mark Crovella; Christophe Diot; Eric D. Kolaczyk; Nina Taft

2004-06-01T23:59:59.000Z

13

Agriculture - Noise and shocking investigation  

Science Conference Proceedings (OSTI)

This power quality (PQ) case study presents an investigation of noise and shocking from the telephone line at a horse farm. The investigation revealed that the noise was caused by an arching connection and vegetation along the fence. Also the charger's grounding system was not installed properly. Recommendations were made to the customer to reinstall the charger's ground system to manufacturer's specification and use an AM radio to find the loose connection along the fence.

2003-12-31T23:59:59.000Z

14

NIST Johnson noise thermometry  

Science Conference Proceedings (OSTI)

... noise thermometry (JNT) is a primary temperature measurement ... and-or other thermal noise sources. ... Quantized Voltage Noise Source (QVNS) (see ...

2011-10-18T23:59:59.000Z

15

COPE: traffic engineering in dynamic networks  

Science Conference Proceedings (OSTI)

Traffic engineering plays a critical role in determining the performance and reliability of a network. A major challenge in traffic engineering is how to cope with dynamic and unpredictable changes in traffic demand. In this paper, we propose COPE, a ... Keywords: COPE, oblivious routing, optimization, traffic engineering, unpredictable traffic

Hao Wang; Haiyong Xie; Lili Qiu; Yang Richard Yang; Yin Zhang; Albert Greenberg

2006-08-01T23:59:59.000Z

16

Leveraging router programmability for traffic matrix computation  

Science Conference Proceedings (OSTI)

Traffic matrices are used by Internet Service Providers as an input for many business-critical activities like capacity planning and traffic engineering. Despite their importance, current approaches for computing traffic matrices are either unpractical ...

Giacomo Balestra; Salvatore Luciano; Maurizio Pizzonia; Stefano Vissicchio

2010-11-01T23:59:59.000Z

17

Traffic observation and situation assessment  

Science Conference Proceedings (OSTI)

Utilization of camera systems for surveillance tasks (e. g. traffic monitoring) has become a standard procedure and has been in use for over 20 years. However, most of the cameras are operated locally and data analyzed manually. Locally means here a ... Keywords: cooperative distributed vision, multi-camera orientation, multi-camera system, multi-target tracking, situation, traffic observation

Ralf Reulke; Dominik Rueß; Kristian Manthey; Andreas Luber

2011-06-01T23:59:59.000Z

18

Fast monitoring of traffic subpopulations  

Science Conference Proceedings (OSTI)

Network accounting, forensics, security, and performance monitoring applications often need to examine detailed traces from subsets of flows ("subpopulations"), where the application desires flexibility in specifying the subpopulation (e.g., to detect ... Keywords: counters, flexsample, sampling, traffic statistics, traffic subpopulations

Anirudh Ramachandran; Srinivasan Seetharaman; Nick Feamster; Vijay Vazirani

2008-10-01T23:59:59.000Z

19

FAQS Reference Guide - Transportation and Traffic Management...  

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

Transportation and Traffic Management FAQS Reference Guide - Transportation and Traffic Management This reference guide addresses the competency statements in the September 2002...

20

FAQS Reference Guide - Transportation and Traffic Management...  

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

FAQS Reference Guide - Transportation and Traffic Management FAQS Reference Guide - Transportation and Traffic Management This reference guide addresses the competency statements...

Note: This page contains sample records for the topic "quality noise traffic" 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

Test instances for the traffic assignment problem  

E-Print Network (OSTI)

Test instances for the traffic assignment problem. F. Babonneau. ?. J.-P. Vial. ?. January 8, 2008. Abstract. This short note on the Traffic Assignment Problem ...

22

Road traffic model using distributed camera network  

Science Conference Proceedings (OSTI)

Traffic monitoring/prediction using a distributed camera network is presented in this paper. The activities on each road link are monitored and features are derived to identify the pattern. Then it is learnt, classified, predicted and communicated to ... Keywords: hidden Markov model, spatial interest points, spatial-temporal interest points, traffic classification, traffic prediction, traffic surveillance

S. Indu; Sankalp Arora; Santanu Chaudhury; Asok Bhattacharyya

2010-12-01T23:59:59.000Z

23

Virtual urban traffic network simulator  

E-Print Network (OSTI)

In this project, I designed and implemented a virtual urban traffic network simulator. The simulator serves as a testbed for human-subject experiments to determine driver behavior in road networks and also as a platform ...

Uh, Jason (Jason J.)

2011-01-01T23:59:59.000Z

24

A new hybrid traffic engineering routing algorithm for bandwidth guaranteed traffic  

Science Conference Proceedings (OSTI)

This paper presents a new hybrid traffic engineering routing algorithm for bandwidth guaranteed traffic. Former traffic engineering routing algorithms mainly optimize one of the three objectives: minimizing the hop count, balancing the load and minimizing ...

Zhaowei Meng; Jinshu Su; Stefano Avallone

2006-11-01T23:59:59.000Z

25

Anisotropic mesoscopic traffic simulation approach to support large-scale traffic and logistic modeling and analysis  

Science Conference Proceedings (OSTI)

Large-scale traffic and transportation logistics analysis requires a realistic depiction of network traffic condition in a dynamic manner. In the past decades, vehicular traffic simulation approaches have been increasingly developed and applied to describe ...

Ye Tian; Yi-Chang Chiu

2011-12-01T23:59:59.000Z

26

Mixed Manual/Semi-Automated Traffic: A Macroscopic Analysis  

E-Print Network (OSTI)

of Traffic Flow with Mixed Manual and Semi- Automatedof Mixed Semi-Automated/Manual Traffic”, SAE Technical Paperof traffic flow with mixed manual and semi- automated

Bose, Arnab; Ioannou, Petros

2001-01-01T23:59:59.000Z

27

Overview and Principles of Internet Traffic Engineering  

Science Conference Proceedings (OSTI)

This memo describes the principles of Traffic Engineering (TE) in the Internet. The document is intended to promote better understanding of the issues surrounding traffic engineering in IP networks, and to provide a common basis for the development ...

D. Awduche; A. Chiu; A. Elwalid; I. Widjaja; X. Xiao

2002-05-01T23:59:59.000Z

28

Manifold learning visualization of network traffic data  

Science Conference Proceedings (OSTI)

When traffic anomalies or intrusion attempts occur on the network, we expect that the distribution of network traffic will change. Monitoring the network for changes over time, across space (at various routers in the network), over source and destination ... Keywords: data mining, internet traffic anomaly detection & forensics

Neal Patwari; Alfred O. Hero, III; Adam Pacholski

2005-08-01T23:59:59.000Z

29

Road traffic congestion in the developing world  

Science Conference Proceedings (OSTI)

Road traffic jams continue to remain a major problem in most cities around the world, especially in developing regions resulting in massive delays, increased fuel wastage and monetary losses. Due to the poorly planned road networks, a common outcome ... Keywords: congestion collapse, simulation, traffic congestion, traffic detection

Vipin Jain; Ashlesh Sharma; Lakshminarayanan Subramanian

2012-03-01T23:59:59.000Z

30

Dimensioning optical networks under traffic growth models  

Science Conference Proceedings (OSTI)

In this paper, we consider the problem of dimensioning a large optical wavelength-division multiplexing (WDM) network assuming the traffic is growing over time. Traffic between pairs of nodes is carried through lightpaths which are high-bandwidth end-to-end ... Keywords: capacity allocation, capacity exhaustion probability, stochastic modeling, traffic growth model

Tapan Kumar Nayak; Kumar N. Sivarajan

2003-12-01T23:59:59.000Z

31

Spatiotemporal periodical pattern mining in traffic data  

Science Conference Proceedings (OSTI)

The widespread use of road sensors has generated huge amount of traffic data, which can be mined and put to various different uses. Finding frequent trajectories from the road network of a big city helps in summarizing the way the traffic behaves in ... Keywords: KL-divergence, density-based clustering, periodic patterns, probability distribution matrices, road network, spatiotemporal data, traffic data

Tanvi Jindal, Prasanna Giridhar, Lu-An Tang, Jun Li, Jiawei Han

2013-08-01T23:59:59.000Z

32

Ocean shell noises  

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

Ocean shell noises Name: Rick A Cazzato Location: NA Country: NA Date: NA Question: Why do you here noises when you put a ocean shell to your ear? Does this happen because of...

33

FAQS Qualification Card - Transportation and Traffic Management |  

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

Transportation and Traffic Management Transportation and Traffic Management FAQS Qualification Card - Transportation and Traffic Management A key element for the Department's Technical Qualification Programs is a set of common Functional Area Qualification Standards (FAQS) and associated Job Task Analyses (JTA). These standards are developed for various functional areas of responsibility in the Department, including oversight of safety management programs identified as hazard controls in Documented Safety Analyses (DSA). For each functional area, the FAQS identify the minimum technical competencies and supporting knowledge and skills for a typical qualified individual working in the area. FAQC-TransportationAndTrafficManagement.docx Description Transportation and Traffic Management Qualification Card

34

Community response to noise from a general aviation airport  

SciTech Connect

The paper provides relationships between noise level and response variables through an analysis of social survey and physical data collected around a small general aviation airport. The responses investigated included annoyance, activity interference, health effects, and non-noise effects of general aviation traffic, such as fear of crashes, air pollution, aircraft lights, house vibration, and television interference. Results indicate a much higher response than that predicted by Schultz (1978), e.g., at 30 NEF, Schultz predicts approximately 15% highly annoyed, compared with 28% in this study.

Birnie, S.E.; Hall, F.L.; Taylor, S.M.

1980-07-01T23:59:59.000Z

35

A new approach in signal processing for sodium boiling noise detection by probability density function estimates  

Science Conference Proceedings (OSTI)

The probability density function (pdf) method of noise signal processing has been investigated for its capability and quality in detecting sodium boiling noise. In an attempt to identify proper features of the pdf for sodium boiling noise detection, the segmented areas under the pdf curves have been found sensitive to sodium boiling noise. New approaches have been followed in selecting the feature threshold and achieving the targeted probabilities for false and missed sodium boiling noise detection.

Reddy, C.P.; Singh, O.P.; Vyjayanthi, R.K.; Prabhakar, R.

1988-03-01T23:59:59.000Z

36

A Preliminary Study on Anticipatory Stigmergy for Traffic Management  

Science Conference Proceedings (OSTI)

In this paper, we propose an anticipatory stigmergy model for decentralized traffic congestion management. Managing traffic congestion is one of the main issues for smart cities, and many works have been trying to address it from the IT and Transportation ... Keywords: traffic management, traffic information, traffic simulation, stigmergy

Jun Takahashi; Ryo Kanamori; Takayuki Ito

2012-12-01T23:59:59.000Z

37

Neural Networks for Real-Time Traffic Signal Control  

Science Conference Proceedings (OSTI)

Real-time traffic signal control is an integral part of the urban traffic control system, and providing effective real-time traffic signal control for a large complex traffic network is an extremely challenging distributed control problem. This paper ... Keywords: Distributed control, hybrid model, neural control, online learning, traffic signal control

D. Srinivasan; Min Chee Choy; R. L. Cheu

2006-09-01T23:59:59.000Z

38

Challenging the supremacy of traffic matrices in anomaly detection  

Science Conference Proceedings (OSTI)

Multiple network-wide anomaly detection techniques proposed in the literature define an anomaly as a statistical outlier in aggregated network traffic. The most popular way to aggregate the traffic is as a Traffic Matrix, where the traffic is ... Keywords: anomaly detection, traffic aggregation

Augustin Soule; Fernando Silveira; Haakon Ringberg; Christophe Diot

2007-10-01T23:59:59.000Z

39

Future Air traffic management Concepts Evaluation Tool ...  

Solar Photovoltaic; Solar Thermal; Startup ... Actual air traffic data and weather information are utilized to evaluate an aircraft’s flight-plan ...

40

Real-Time Traffic Information.pub  

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

Traffic Information for Emergency Evacuation Operations Research Brief Oak Ridge National Laboratory managed by UT-Battelle, LLC for the U.S. Department of Energy under Contract...

Note: This page contains sample records for the topic "quality noise traffic" 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

Thermal Noise Metrology  

Science Conference Proceedings (OSTI)

... of a one-port source and the ... from 8.2 gigahertz to 65 gigahertz for waveguide sources. ... remote-sensing measurements to primary noise standards. ...

2011-09-27T23:59:59.000Z

42

Measuring Coastal Boating Noise to Assess Potential Impacts on Marine Life  

SciTech Connect

Article requested for submission in Sea Technology Magazine describing the Underwater Noise From Small Boats. An Overlooked Component of the Acoustic Environment in Coastal Areas. Underwater noise and its effects on marine life deserve attention as human activity in the marine environment increases. Noise can affect fish and marine mammals in ways that are physiological, as in auditory threshold shifts, and behavioral, as in changes in foraging habits. One anthropogenic source of underwater noise that has received little attention to date is recreational boating. Coastal areas and archipelago regions, which play a crucial role in the marine ecosystem, are often subject to high levels of boat traffic. In order to better understand the noise produced by a small powerboat, a test was conducted in Sequim Bay, Washington, using an instrumented research vessel and multiple acoustic sensors. The broadband noise and narrowband peak levels were observed from two different locations while the boat was operated under various conditions. The results, combined with background noise levels, sound propagation and local boat traffic patterns, can provide a picture of the total boating noise to which marine life may be subjected.

Matzner, Shari; Jones, Mark E.

2011-07-01T23:59:59.000Z

43

LED Traffic Lights Get Buy American Stamp | Department of Energy  

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

LED Traffic Lights Get Buy American Stamp LED Traffic Lights Get Buy American Stamp November 30, 2010 - 10:19am Addthis Red. Yellow. Green. What LED traffic signals don't say: Made...

44

Traffic condition tracking and visualization in virtual city testbed  

E-Print Network (OSTI)

Computer traffic simulation is a tool widely used to understand how humans behave under varying traffic conditions. The Virtual City Testbed is a traffic simulation framework built to closely model human behavior by allowing ...

Zhu, Boyuan, M. Eng. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

45

Stability issues for dynamic traffic assignment  

Science Conference Proceedings (OSTI)

This paper explores stability issues for operational route guidance control strategies for vehicular traffic networks equipped with advanced information systems, and develops a general procedure for the stability analysis of the associated dynamic traffic ... Keywords: Dynamical systems, Feedback control, Lyapunov methods, Stability analysis

S. Peeta; T. -H. Yang

2003-01-01T23:59:59.000Z

46

On Mobile Agents Resistance to Traffic Analysis  

Science Conference Proceedings (OSTI)

This paper will concern itself with a formulation of a traffic analysis problem for mobile agents. It is an interesting theoretical problem as well as a critical feature when using agents on a massive scale in decision making systems. The decision making ... Keywords: Mobile agents security, security protocols, side channel attacks, traffic analysis

Kamil Kulesza; Zbigniew Kotulski; Konrad Kulesza

2006-01-01T23:59:59.000Z

47

Traffic data repository at the WIDE project  

Science Conference Proceedings (OSTI)

It becomes increasingly important for both network researchers and operators to know the trend of network traffic and to find anomaly in their network traffic. This paper describes an on-going effort within the WIDE project to collect a set of free tools ...

Kenjiro Cho; Koushirou Mitsuya; Akira Kato

2000-06-01T23:59:59.000Z

48

A Cooperative Approach to Interdomain Traffic Engineering  

E-Print Network (OSTI)

For performance or cost reasons, Autonomous Systems (AS) often need to control the flow of their incoming interdomain traffic. Controlling its incoming traffic is a difficult task since it often implies influencing ASes on the path. The current BGP-based techniques that an AS can use for this purpose are primitive. Moreover, their effect is often difficult to predict.

Bruno Quoitin; Olivier Bonaventure

2005-01-01T23:59:59.000Z

49

BTS (version 1.0): Bottleneck Traffic Simulator User's Manual  

E-Print Network (OSTI)

Traffic Simulator User's Manual Wei Hua Lin Randolph W. HallTraffic Simulator User’ Manual s Wei Hua Lin Randolph W.

Lin, Wei Hua; Hall, Ranolph W.

1991-01-01T23:59:59.000Z

50

An Exploration of the Market for Traffic Information  

E-Print Network (OSTI)

for Traffic of the Market Information by MatthewMalchowproviders then market their information to broadcastAn Exploration of the Market for Traffic Information Shirley

Chan, Shirley; Malchow, Matthew; Kanafani, Adib

1997-01-01T23:59:59.000Z

51

Fermilab | Traffic Safety at Fermilab |  

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

Photo of Street Sign: No Cell Phones While Driving Photo of Street Sign: No Cell Phones While Driving Remember: No on-site cell phone use while driving. Speed limits: Don't let warm weather give you a lead foot The roads are clear, the sun is bright, and the urge to drive a little faster is lurking in the back of our minds. We have our sunglasses on and are flexing our hands in our driving gloves. But before you hit the accelerator take five seconds and think. Remember that posted speeds on site take into consideration visibility, road width and conditions, traffic patterns and other safety factors. Double yellow lines and warning signs are posted to augment safety considerations in that area as well. Fermilab has adopted, as a minimum standard, portions of the State of Illinois Vehicle Code and the Rules of the Road. These are the same

52

On Modeling MPEG Video Traffics  

E-Print Network (OSTI)

This paper traces the development/evolution of three of our recently proposed MPEG coded video traffic models, that can capture the statistical properties of MPEG video data. The basic ideas behind these models are to decompose an MPEG compressed video sequence into several parts according to motion /scene complexity or data structure. Each part is described by a self-similar process. These different self-similar processes are then combined to form the respective models. In addition, Beta distribution is used to characterize the marginal cumulative distribution (CDF) of the self-similar processes. Comparison among the three models shows that the latest model (called the simple IPB composite model) is the most practical one in terms of accuracy and complexity. Simulations based on many real MPEG compressed movie sequences, including StarWars, have demonstrated that the simple model can capture the autocorrelation function (ACF) and the marginal CDF very closely.

Nirwan Ansari; Hai Liu; Yun Q. Shi; Senior Member; Hong Zhao

2002-01-01T23:59:59.000Z

53

The effect of multiple entrances on the elevator round trip time under up-peak traffic  

Science Conference Proceedings (OSTI)

The design of vertical transportation systems relies on the calculation of the interval as an indicator of the quality of service. This in turn involves the accurate calculation of the round trip time of a single elevator. The calculation of the round ... Keywords: Basement, Elevator, Interval, Lift, Round trip time, Up peak traffic

Lutfi Al-Sharif

2010-08-01T23:59:59.000Z

54

Design and performance evaluation of a fuzzy based traffic conditioner for differentiated services  

Science Conference Proceedings (OSTI)

The current Internet can only provide the best-effort services. By growing the Internet and its applications, new services with different requirements are developed. The differentiated services (Diffserv) [S. Blake, M. Carlson, E. Davies, Z. Wang, W. ... Keywords: Differentiated services (Diffserv), Fuzzy logic controller (FLC), Quality of service (QoS), Scheduling mechanisms, Traffic metering

Mohammad Hossien Yaghmaee; Mohammad Bagher Menhaj; Hale Amintoosi

2005-04-01T23:59:59.000Z

55

Design and analysis of multi-level active queue management mechanisms for emergency traffic  

Science Conference Proceedings (OSTI)

Multiple average-multiple threshold (MAMT) active queue management (AQM) is proposed as a solution for providing available and dependable service to traffic from emergency users after disasters. MAMT is a simple but effective approach that can be applied ... Keywords: Active queue management, Emergency services, Quality of service

Manali Joshi; Ajay Mansata; Salil Talauliker; Cory Beard

2005-02-01T23:59:59.000Z

56

Rotor Noise in Maneuvering Flight.  

E-Print Network (OSTI)

??The objective of this research is to understand the physics of rotor noise in the maneuvering flight. To achieve this objective, an integrated noise prediction… (more)

Chen, Hsuan-nien

2006-01-01T23:59:59.000Z

57

Freeway Short-Term Traffic Flow Forecasting by Considering Traffic Volatility Dynamics and Missing Data Situations  

E-Print Network (OSTI)

Short-term traffic flow forecasting is a critical function in advanced traffic management systems (ATMS) and advanced traveler information systems (ATIS). Accurate forecasting results are useful to indicate future traffic conditions and assist traffic managers in seeking solutions to congestion problems on urban freeways and surface streets. There is new research interest in short-term traffic flow forecasting due to recent developments in ITS technologies. Previous research involves technologies in multiple areas, and a significant number of forecasting methods exist in literature. However, forecasting reliability is not properly addressed in existing studies. Most forecasting methods only focus on the expected value of traffic flow, assuming constant variance when perform forecasting. This method does not consider the volatility nature of traffic flow data. This paper demonstrated that the variance part of traffic flow data is not constant, and dependency exists. A volatility model studies the dependency among the variance part of traffic flow data and provides a prediction range to indicate the reliability of traffic flow forecasting. We proposed an ARIMA-GARCH (Autoregressive Integrated Moving Average- AutoRegressive Conditional Heteroskedasticity) model to study the volatile nature of traffic flow data. Another problem of existing studies is that most methods have limited forecasting abilities when there is missing data in historical or current traffic flow data. We developed a General Regression Neural Network(GRNN) based multivariate forecasting method to deal with this issue. This method uses upstream information to predict traffic flow at the studied site. The study results indicate that the ARIMA-GARCH model outperforms other methods in non-missing data situations, while the GRNN model performs better in missing data situations.

Zhang, Yanru

2011-08-01T23:59:59.000Z

58

Stream traffic management over an ATM passive optical network  

Science Conference Proceedings (OSTI)

Keywords: ATM traffic management, fibre-in-the-loop, passive optical network (PON), service disciplines

Maurice Gagnaire; Sašo Stojanovski

2000-05-01T23:59:59.000Z

59

Modeling the Air Traffic Controller's Cognitive Projection Process  

E-Print Network (OSTI)

Cognitive projection enables the operator of a supervisory control system, such as air traffic control, to

Davison Reynolds, Hayley J

2006-11-20T23:59:59.000Z

60

Measurement and performance evaluation of NFS traffic in ATM network  

Science Conference Proceedings (OSTI)

This article has three parts. At first, we explore traffic characterization of an ATM local area network and find the traffic presents both long and short range dependence in nature. Secondly, one long range dependent traffic model (fast fractional Gaussian ... Keywords: ATM, NFS, Traffic measurement

Jung-Shian Li; A Wolisz; R Popescu-Zeletin

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quality noise traffic" 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

Fermilab | Traffic Safety at Fermilab | Resources  

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

Resources Resources Bicycle and Pedestrian Safety: Pedestrian Safety Awareness for Families Pedestrian Safety at Crosswalks Pedestrian Safety @ Fermilab Bicycle Helmet Safety Institute Take the Share The Road Quiz DuPage County Bike Maps Kane County Bike Maps League of Illinois Bicyclists State of Illinois Regional Bike Maps Rules and regulations: Fermilab traffic rules (FESHM 9010) Fermilab Today article on traffic safety on site, March 1, 2010 Illinois Rules of the Road Illinois ban of cell phone use while driving in school and construction zones (Illinois House Bill 72, passed August 6, 2009): Traffic safety: Illinois traffic safety publications Studies on distracted driving and cell-phone use while driving: http://www.nsc.org/safety_road/Distracted_Driving/Pages/distracted_driving.aspx

62

Mobile Traffic Management System Test Deployment  

E-Print Network (OSTI)

operation in the Mobile TMC and video transmission to the District 12 TMC and difficulty with the wirelessoperation. The modified trailer was now capable of providing traffic data and video via wireless

Gerfen, Jeffrey Brian

2005-01-01T23:59:59.000Z

63

Predict flare noise and spectrum  

Science Conference Proceedings (OSTI)

Predicting flare combustion noise is important to ensure the flare is a certain distance from inhabited areas. Generally, it not feasible to increase the stack height to lower the overall noise at a particular point. This article shows how to calculate flare noise including spectrum considerations. Depending on the spectrum, a lower power noise source may sound louder than a higher power source.

Leite, O.C. (Pilgrim Steel Co., Glassboro, NJ (US))

1988-12-01T23:59:59.000Z

64

Multilag Correlation Estimators for Polarimetric Radar Measurements in the Presence of Noise  

Science Conference Proceedings (OSTI)

The quality of polarimetric radar data degrades as the signal-to-noise ratio (SNR) decreases. This substantially limits the usage of collected polarimetric radar data to high SNR regions. To improve data quality at low SNRs, multilag correlation ...

Lei Lei; Guifu Zhang; Richard J. Doviak; Robert Palmer; Boon Leng Cheong; Ming Xue; Qing Cao; Yinguang Li

2012-06-01T23:59:59.000Z

65

Sociopsychological factors affecting the human response to noise exposure  

SciTech Connect

Community noise is reported to be the most often mentioned undesirable neighborhood condition in a recent US Census survey. Understanding community response to noise involves the measurement of a number of complex acoustic and nonacoustic variables and establishing the chain of relationships between physical exposure, perception, annoyance, and acceptability responses and finally complaint behavior. The perceived loudness of a noise is the most important acoustic parameter influencing annoyance and complaints, and the simple dBA unit can be used to integrate spectral characteristics of complex sounds in community studies. Although energy averaging such as Leq or Ldn can be used to describe multiple noise exposures over time, the variable trade-off relationships between number and level of exposures are somewhat obscured by such summary measures. However, they are still the best available descriptors and, until more accurate ones are developed, can be used to measure community noise environments. Perception of an identical noise exposure can vary according to the physiological noise sensitivity of a person and the activity context in which the noise is heard. Although the acoustic quality of the noise itself usually explains about 10 to 25 per cent of the variability in annoyance responses, sociopsychological variables measured in field studies account for 35 to 50 per cent of the variations in human annoyance responses. Three of the most important nonacoustic factors are the connotative fear effects of the noise signal, the feeling that those responsible for the noise are misfeasant in not reducing the noise, and the feeling that harmful health effects are produced by the noise.

Borsky, P.N.

1979-08-01T23:59:59.000Z

66

FHWA Traffic Volume Trend Monthly VMT Report - October 2010 | Data.gov  

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

October 2010 October 2010 Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data FHWA Traffic Volume Trend Monthly VMT Report - October 2010 Dataset Summary Description The Traffic Volume Trends montly report is a natinal data report that provides quality controlled vehicle miles traveled data for each State for all roadways Tags {"volume data",tvt,"traffic volume trends",'fhwa,AADT,VMT,"Vehicle Miles Traveled"} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet Ease of Access 0 No votes yet Dataset Additional Information Last Updated 02/01/2012 Publisher Federal Highway Administration, Department of Transportation Contact Name Contact Email daniel.jenkins@dot.gov

67

FHWA Traffic Volume Trend Monthly VMT Report - June 2010 | Data.gov  

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

June 2010 June 2010 Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data FHWA Traffic Volume Trend Monthly VMT Report - June 2010 Dataset Summary Description The Traffic Volume Trends montly report is a natinal data report that provides quality controlled vehicle miles traveled data for each State for all roadways Tags {"volume data",tvt,"traffic volume trends",'fhwa,AADT,VMT,"Vehicle Miles Traveled"} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet Ease of Access 0 No votes yet Dataset Additional Information Last Updated 02/01/2012 Publisher Federal Highway Administration, Department of Transportation Contact Name Contact Email daniel.jenkins@dot.gov

68

FHWA Traffic Volume Trend Monthly VMT Report - October 2011 | Data.gov  

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

October 2011 October 2011 Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data FHWA Traffic Volume Trend Monthly VMT Report - October 2011 Dataset Summary Description The Traffic Volume Trends montly report is a natinal data report that provides quality controlled vehicle miles traveled data for each State for all roadways Tags {"volume data",tvt,"traffic volume trends",'fhwa,AADT,VMT,"Vehicle Miles Traveled"} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet Ease of Access 0 No votes yet Dataset Additional Information Last Updated 02/01/2012 Publisher Federal Highway Administration, Department of Transportation Contact Name Contact Email daniel.jenkins@dot.gov

69

FHWA Traffic Volume Trend Monthly VMT Report - September 2011 | Data.gov  

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

September 2011 September 2011 Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data FHWA Traffic Volume Trend Monthly VMT Report - September 2011 Dataset Summary Description The Traffic Volume Trends montly report is a natinal data report that provides quality controlled vehicle miles traveled data for each State for all roadways Tags {"volume data",tvt,"traffic volume trends",'fhwa,AADT,VMT,"Vehicle Miles Traveled"} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet Ease of Access 0 No votes yet Dataset Additional Information Last Updated 02/01/2012 Publisher Federal Highway Administration, Department of Transportation Contact Name Contact Email daniel.jenkins@dot.gov

70

FHWA Traffic Volume Trend Monthly VMT Report - June 2011 | Data.gov  

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

June 2011 June 2011 Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data FHWA Traffic Volume Trend Monthly VMT Report - June 2011 Dataset Summary Description The Traffic Volume Trends montly report is a natinal data report that provides quality controlled vehicle miles traveled data for each State for all roadways Tags {"volume data",tvt,"traffic volume trends",'fhwa,AADT,VMT,"Vehicle Miles Traveled"} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet Ease of Access 0 No votes yet Dataset Additional Information Last Updated 02/01/2012 Publisher Federal Highway Administration, Department of Transportation Contact Name Contact Email daniel.jenkins@dot.gov

71

FHWA Traffic Volume Trend Monthly VMT Report - September 2010 | Data.gov  

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

September 2010 September 2010 Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data FHWA Traffic Volume Trend Monthly VMT Report - September 2010 Dataset Summary Description The Traffic Volume Trends montly report is a natinal data report that provides quality controlled vehicle miles traveled data for each State for all roadways Tags {"volume data",tvt,"traffic volume trends",'fhwa,AADT,VMT,"Vehicle Miles Traveled"} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet Ease of Access 0 No votes yet Dataset Additional Information Last Updated 02/01/2012 Publisher Federal Highway Administration, Department of Transportation Contact Name Contact Email daniel.jenkins@dot.gov

72

Enhanced SMART Signal system provides real-time traffic data to road users and traffic engineers  

E-Print Network (OSTI)

are looking for new ways to monitor and manage local traffic signal systems. Despite this growing need mobility: measuring accessibility in U.S. cities Every year, Americans face a steady stream of discouraging these reports focus almost exclusively on traffic mobility--how quickly travelers can move between any two

Minnesota, University of

73

Bursty traffic over bursty links  

Science Conference Proceedings (OSTI)

Accurate estimation of link quality is the key to enable efficient routing in wireless sensor networks. Current link estimators focus mainly on identifying long-term stable links for routing. They leave out a potentially large set of intermediate links ... Keywords: bursty links, link estimation, routing

Muhammad Hamad Alizai; Olaf Landsiedel; Jó Ágila Bitsch Link; Stefan Götz; Klaus Wehrle

2009-11-01T23:59:59.000Z

74

White Noise Theory  

E-Print Network (OSTI)

white noise space 3.2 Wick tensors 3.3 Hida-Kubo-Takenaka space 3.4 Kondratiev-Streit space 3.5 Cochran-Kuo-Sengupta space 4. Continuous versions and analytic extensions 4.1 Continuous versions 4.2 Analytic extensions 4.3 Integrable functions 4.4 Generalized functions induced by measures 4.5 Generalized Radon-Nikodym derivative 5. Characterization theorems 5.1 The S-transform 5.2 Characterization of generalized functions 5.3 Convergence of generalized functions 5.4 Characterization of test functions 5.5 Intrinsic topology for the space of test functions 6. Continuous operators and adjoints 6.1 Differential operators 6.2 Translation and scaling operators 6.3 Multiplication and Wick product 6.4 Fourier-Gauss transform 6.5 Extensions to CKS-spaces 7. Comments on other topics and applications 1 2 HUI-HSIUNG KUO 1. Introduction x1.1 What is white noise? White noise is a sound with equal intensity at all frequencies within a broad band. Rock music, the roar of a jet engine, and the noise...

Hui-Hsiung Kuo

1999-01-01T23:59:59.000Z

75

Thermal Noise Metrology Project Talks  

Science Conference Proceedings (OSTI)

... "Simulations of Noise-Parameter Uncertainties," (1.5 MB) J. Randa, International Microwave Symposium, Seattle, June 2002. ...

2010-10-05T23:59:59.000Z

76

Noise and Hearing Conservation  

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

Hearing Conservation Hearing Conservation Mary L. Doyle NOISE & HEARING CONSERVATION Mary L. Doyle, MPH, RN, COHN-S/CM DOE Headquarters January 16, 2002 1.0.1.~ CAUSES OF HEARING LOSS * Congenital * Environmental Exposures * Hereditary * Illness *Injury * Noise * Occupational * Non-Occupational * Sociacusis S.O.S. eon.ua.nt. OTOTOXIC DRUGS Can Affect Cochlea or Vestibular System * Aminoglycoside Antibiotics * Diuretics * Cancer Chemotherapy * Aspirin * Quinines * Usually Permanent * Consider Benefit-Risk Ratio S.O.S. eon.ua.nts HEARING * Modification of Acoustic Wave by Outer Ear * Conversion of Modified Acoustic Wave to Vibration of Eardrum * Middle Ear * Inner Ear * Transformation of Mechanical Movement to Nerve Impulses S.O.S. CoMubRis OTOTOXIC INDUSTRIAL

77

Optical Johnson noise thermometry  

DOE Patents (OSTI)

This invention is a method and device for direct, non-contact temperature measure of a body. A laser beam is reflected from the surface of the body and detected along with the Planck radiation. The detected signal is analyzed using signal correlation technique to generate an output signal proportional to the Johnson noise introduced into the reflected laser beam as a direct measure of the absolute temperature of the body. 2 figs.

Shepard, R.L.; Blalock, T.V.; Roberts, M.J.

1989-01-30T23:59:59.000Z

78

Assessing the Impact of Weather on Traffic Intensity  

Science Conference Proceedings (OSTI)

This paper focuses on the effect of weather conditions on daily traffic intensities (the number of cars passing a specific segment of a road). The main objective is to examination whether or not weather conditions uniformly alter daily traffic ...

Mario Cools; Elke Moons; Geert Wets

2010-01-01T23:59:59.000Z

79

Real-time network traffic prediction based on a multiscale decomposition  

Science Conference Proceedings (OSTI)

The presence of the complex scaling behavior in network traffic makes accurate forecasting of the traffic a challenging task. In this paper we propose a multiscale decomposition approach to real time traffic prediction. The raw traffic data is first ...

Guoqiang Mao

2005-04-01T23:59:59.000Z

80

SignalGuru: Leveraging mobile phones for collaborative traffic signal schedule advisory  

E-Print Network (OSTI)

While traffic signals are necessary to safely control competing flows of traffic, they inevitably enforce a stop-and-go movement pattern that increases fuel consumption, reduces traffic flow and causes traffic jams. These ...

Koukoumidis, Emmanouil

Note: This page contains sample records for the topic "quality noise traffic" 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

Safe and Efficient Traffic Flow for Aluminum Smelters  

Science Conference Proceedings (OSTI)

Abstract Scope, Aluminum smelter design, construction and operation requires: ... and traffic scheduling for vehicles and pedestrians throughout the Smelter.

82

Responses of wintering humpback whales to vessel traffic  

Science Conference Proceedings (OSTI)

Responses of humpback whales to vessel traffic were monitored over two winter seasons during 1983–1984 in Maui

Gordon B. Bauer; Joseph R. Mobley; Louis M. Herman

1993-01-01T23:59:59.000Z

83

Efficient network QoS provisioning based on per node traffic shaping  

Science Conference Proceedings (OSTI)

Keywords: ATM, QoS provisioning, end-to-end delay guarantees, real-time traffic, scheduling, traffic shaping

Leonidas Georgiadis; Roch Guérin; Vinod Peris; Kumar N. Sivarajan

1996-08-01T23:59:59.000Z

84

Detecting intrusions in encrypted control traffic  

Science Conference Proceedings (OSTI)

Because of a lack of attack signatures and different forms of attacks, signature-based network intrusion detection systems currently provide insufficient protection for industrial control traffic. A combination of two anomaly detection approaches found ... Keywords: industrial control systems, intrusion detection, smart grids

Maarten Hoeve

2013-11-01T23:59:59.000Z

85

Traffic and Transportation Committee October 5, 2009  

E-Print Network (OSTI)

Traffic and Transportation Committee October 5, 2009 1:30 pm ­ Room 645 (6th Floor) Rice Park Construction project ­ Bob Sperling, Salt Lake City 4. Alternative Transportation update ­ Alma of session. 7. Announcements and/or new items for discussion. 8. Discussion regarding future meeting schedule

Capecchi, Mario R.

86

Does Daylight Savings Time Affect Traffic Accidents?  

E-Print Network (OSTI)

This paper studies the effect of changes in accident pattern due to Daylight Savings Time (DST). The extension of the DST in 2007 provides a natural experiment to determine whether the number of traffic accidents is affected by shifts in hours of daylight using the year as control group. Using data on traffic accidents in Texas based on crash reports provided by the Texas Transportation Institute, and a difference in differences technique, this study creates a regression model to determine how significant this factor is in affecting traffic accident patterns as observed in the data. Results show that DST has no statistically significant effect on traffic accidents of all categories including (but not limited to) highway, non-highway, and accidents, accidents with injuries and no injuries, and accidents by drivers of all age-groups. This implies that the federal government’s policy of DST (and its extension) has no costs incurred by a rise in motor vehicle crashes when it gets dark early.

Deen, Sophia 1988-

2012-05-01T23:59:59.000Z

87

Bottleneck analysis and traffic congestion avoidance  

Science Conference Proceedings (OSTI)

With the help of software such as packet sniffer one can easily intercept or capture the network packets that travel across the network. The sniffer captures these packets by setting the NIC card in the promiscuous mode and eventually decodes them and ... Keywords: NIC, libpcap, network analyzer, network monitoring, packet capture, packet sniffer, promiscuous mode, traffic analysis

M. A. Qadeer; A. H. Khan; A. A. Habeeb; M. A. Hafeez

2010-02-01T23:59:59.000Z

88

Author's personal copy Gasoline prices and traffic safety in Mississippi  

E-Print Network (OSTI)

November 2010 Keywords: Gasoline prices Traffic crashes Traffic safety Age Gender Race Problem: Limited-grade unleaded gasoline price data from the Energy Information Administration of the U.S. Department of Energy were used to investigate the effects of gasoline prices on traffic safety by age, gender, and race

Levinson, David M.

89

Using GSM technologies to collect and supply expressway traffic information  

Science Conference Proceedings (OSTI)

Traffic information collecting and distribution are necessary in intelligent transportation systems, which require two-way communications for cars to transmit and receive traffic information. The GSM network has an LCS function, and cell phones using ... Keywords: GSM, ITS, expressway, traffic

Junqiang Guo; Fasheng Liu; Chengjiang Li; Zhiqiang Zhu

2009-09-01T23:59:59.000Z

90

Control of Freeway Traffic Flow in Unstable Phase by Theory  

Science Conference Proceedings (OSTI)

This paper devises a freeway controller that is capable of stabilizing traffic flow when the traffic system is in the unstable (congested) phase, in which a shock wave is likely to occur in the presence of any inhomogeneity and where the system is on ... Keywords: $H_{infty}$ control, $H_{infty}$ control, intelligent transportation system (ITS), ramp metering, speed signaling, traffic flow control

Yi-Hsien Chiang; Jyh-Ching Juang

2008-06-01T23:59:59.000Z

91

A compressive sensing-based reconstruction approach to network traffic  

Science Conference Proceedings (OSTI)

Traffic matrix in a network describes the end-to-end network traffic which embodies the network-level status of communication networks from origin to destination nodes. It is an important input parameter of network traffic engineering and is very crucial ...

Laisen Nie, Dingde Jiang, Zhengzheng Xu

2013-07-01T23:59:59.000Z

92

Optimization of the exposure parameters with signal-to-noise ratios considering human visual characteristics in digital mammography  

Science Conference Proceedings (OSTI)

The use of digital mammography systems has become widespread recently However, the optimal exposure parameters are uncertain in clinical practice We need to optimize the exposure parameter in digital mammography while maximizing image quality and minimizing ... Keywords: average glandular dose, detective quantum efficiency, digital mammography, noise equivalent quanta, noise power spectrum, signal-to-noise ratio

Maki Yamada; Yuri Kato; Naotoshi Fujita; Yoshie Kodera

2010-06-01T23:59:59.000Z

93

WebTrafMon: Web-based Internet/Intranet network traffic monitoring and analysis system  

Science Conference Proceedings (OSTI)

As enterprise computing environments become more network-oriented, the importance of network traffic monitoring and analysis intensifies. Most existing traffic monitoring and analysis tools focus on measuring the traffic loads of individual network segments. ... Keywords: Enterprise network management, Network traffic monitoring and analysis, Traffic management, Traffic type and source analysis, Web-based management

J. W. -K Hong; S.-S Kwon; J.-Y Kim

1999-09-01T23:59:59.000Z

94

A proposal of new price-based Call Admission Control rules for Guaranteed Performance services multiplexed with Best Effort traffic  

Science Conference Proceedings (OSTI)

Pricing for the use of telecommunication services is an issue widely treated in the literature. In the last years it has received a growing attention in order to establish various fairness criteria in the bandwidth allocation for each type of traffic ... Keywords: Asynchronous Transfer Mode, Best Effort services, Call Admission Control, Flow control, Guaranteed Performance services, IP Quality of Service, Pricing, Proportional Fairness

Marco Baglietto; Raffaele Bolla; Franco Davoli; Mario Marchese; Maurizio Mongelli

2003-08-01T23:59:59.000Z

95

The Modified Allan Variance as Time-Domain Analysis Tool for Estimating the Hurst Parameter of Long-Range Dependent Traffic  

E-Print Network (OSTI)

Abstract ? Experimental measurements show that Internet traffic exhibits self-similarity and long-range dependence (LRD). A delicate issue is the estimation of traffic statistical quantities that characterize self-similarity and LRD, such as the Hurst parameter H. In this paper, we propose to use the Modified Allan Variance (MAVAR), a well-known time-domain tool originally studied for frequency stability characterization, for estimating the power-law spectrum and thus the H parameter of LRD traffic time series. This novel method is validated by comparison to one of the most widely adopted algorithms for analyzing LRD traffic: the log-scale diagram technique based on wavelet analysis. Both methods are applied to pseudo-random data series, generated with known values of H. MAVAR exhibits outstanding accuracy in estimating H, better than the classical log-scale method. Finally, both techniques are applied to a real IP traffic trace, providing a further example of the capabilities of MAVAR. Index Terms ? Fractals, fractional noise, Internet, long-range dependence, self-similarity, traffic control (communication). Work partialy supported by Ministero dell’Istruzione, dell’Università e della Ricerca (MIUR), Italy, under FIRB project TANGO. I.

Stefano Bregni; Senior Member; Luca Primerano

2004-01-01T23:59:59.000Z

96

Making the Traffic Operations Case for Congestion Pricing: Operational Impacts of Congestion Pricing  

SciTech Connect

Congestion begins when an excess of vehicles on a segment of roadway at a given time, resulting in speeds that are significantly slower than normal or 'free flow' speeds. Congestion often means stop-and-go traffic. The transition occurs when vehicle density (the number of vehicles per mile in a lane) exceeds a critical level. Once traffic enters a state of congestion, recovery or time to return to a free-flow state is lengthy; and during the recovery process, delay continues to accumulate. The breakdown in speed and flow greatly impedes the efficient operation of the freeway system, resulting in economic, mobility, environmental and safety problems. Freeways are designed to function as access-controlled highways characterized by uninterrupted traffic flow so references to freeway performance relate primarily to the quality of traffic flow or traffic conditions as experienced by users of the freeway. The maximum flow or capacity of a freeway segment is reached while traffic is moving freely. As a result, freeways are most productive when they carry capacity flows at 60 mph, whereas lower speeds impose freeway delay, resulting in bottlenecks. Bottlenecks may be caused by physical disruptions, such as a reduced number of lanes, a change in grade, or an on-ramp with a short merge lane. This type of bottleneck occurs on a predictable or 'recurrent' basis at the same time of day and same day of week. Recurrent congestion totals 45% of congestion and is primarily from bottlenecks (40%) as well as inadequate signal timing (5%). Nonrecurring bottlenecks result from crashes, work zone disruptions, adverse weather conditions, and special events that create surges in demand and that account for over 55% of experienced congestion. Figure 1.1 shows that nonrecurring congestion is composed of traffic incidents (25%), severe weather (15%), work zones, (10%), and special events (5%). Between 1995 and 2005, the average percentage change in increased peak traveler delay, based on hours spent in traffic in a year, grew by 22% as the national average of hours spent in delay grew from 36 hours to 44 hours. Peak delay per traveler grew one-third in medium-size urban areas over the 10 year period. The traffic engineering community has developed an arsenal of integrated tools to mitigate the impacts of congestion on freeway throughput and performance, including pricing of capacity to manage demand for travel. Congestion pricing is a strategy which dynamically matches demand with available capacity. A congestion price is a user fee equal to the added cost imposed on other travelers as a result of the last traveler's entry into the highway network. The concept is based on the idea that motorists should pay for the additional congestion they create when entering a congested road. The concept calls for fees to vary according to the level of congestion with the price mechanism applied to make travelers more fully aware of the congestion externality they impose on other travelers and the system itself. The operational rationales for the institution of pricing strategies are to improve the efficiency of operations in a corridor and/or to better manage congestion. To this end, the objectives of this project were to: (1) Better understand and quantify the impacts of congestion pricing strategies on traffic operations through the study of actual projects, and (2) Better understand and quantify the impacts of congestion pricing strategies on traffic operations through the use of modeling and other analytical methods. Specifically, the project was to identify credible analytical procedures that FHWA can use to quantify the impacts of various congestion pricing strategies on traffic flow (throughput) and congestion.

Chin, Shih-Miao [ORNL; Hu, Patricia S [ORNL; Davidson, Diane [ORNL

2011-02-01T23:59:59.000Z

97

Imaging with ambient noise  

Science Conference Proceedings (OSTI)

Recent developments in seismology, ultrasonics, and underwater acoustics have led to a radical change in the way scientists think about ambient noise--the diffuse waves generated by pressure fluctuations in the atmosphere, the scattering of water waves in the ocean, and any number of other sources that pervade our world. Because diffuse waves consist of the superposition of waves propagating in all directions, they appear to be chaotic and random. That appearance notwithstanding, diffuse waves carry information about the medium through which they propagate.

Snieder, Roel; Wapenaar, Kees [Colorado School of Mines, Golden (United States); Delft University of Technology, Delft (Netherlands)

2010-09-15T23:59:59.000Z

98

No-Reference image quality assessment for facial images  

Science Conference Proceedings (OSTI)

Image quality assessment traditionally means the comparison of original image with its distorted version using conventional methods like Mean Square Error (MSE) or Peak Signal to Noise Ratio (PSNR). In case of Blind Quality Evaluation with no prior knowledge ... Keywords: contrast, eye visibility, image quality assessment, luminance, no-reference, noise, sharpness

Debalina Bhattacharjee; Surya Prakash; Phalguni Gupta

2011-08-01T23:59:59.000Z

99

LED Traffic Lights Get Buy American Stamp | Department of Energy  

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

LED Traffic Lights Get Buy American Stamp LED Traffic Lights Get Buy American Stamp LED Traffic Lights Get Buy American Stamp November 29, 2010 - 10:00am Addthis LED traffic lights are assembled at Dialight’s factory in Roxboro, N.C. The company has expanded production at the facility, adding more than 100 jobs over the past two years. | Photo Courtesy of Dialight LED traffic lights are assembled at Dialight's factory in Roxboro, N.C. The company has expanded production at the facility, adding more than 100 jobs over the past two years. | Photo Courtesy of Dialight Lindsay Gsell LED traffic lights are assembled at Dialight's factory in Roxboro, N.C. The company has expanded production at the facility, adding more than 100 jobs over the past two years. Red. Yellow. Green. What LED traffic signals don't say: Made in USA.

100

Holographic Noise in Interferometers  

E-Print Network (OSTI)

Arguments based on general principles of quantum mechanics suggest that a minimum length or time associated with Planck-scale unification may entail a new kind of observable uncertainty in the transverse position of macroscopically separated bodies. Transverse positions vary randomly about classical geodesics in space and time by about the geometric mean of the Planck scale and separation, on a timescale corresponding to their separation. An effective theory based on a Planck information flux limit, and normalized by the black hole entropy formula, is developed to predict measurable correlations, such as the statistical properties of noise in interferometer signals. A connection with holographic unification is illustrated by representing Matrix theory position operators with a Schr\\"odinger wave equation, interpreted as a paraxial wave equation with a Planck frequency carrier. Solutions of this equation are used to derive formulas for the spectrum of beamsplitter position fluctuations and equivalent strain noise in a Michelson interferometer, determined by the Planck time, with no other parameters. The spectral amplitude of equivalent strain derived here is a factor of \\sqrt{\\pi} smaller than previously published estimates. Signals in two nearly-collocated interferometers are predicted to be highly correlated, a feature that may provide convincing evidence for or against this interpretation of holography.

Craig J. Hogan

2009-05-29T23:59:59.000Z

Note: This page contains sample records for the topic "quality noise traffic" 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

Low-noise SQUID  

DOE Patents (OSTI)

The present invention comprises a high-transition-temperature superconducting device having low-magnitude low-frequency noise-characteristics in magnetic fields comprising superconducting films wherein the films have a width that is less than or equal to a critical width, w.sub.C, which depends on an ambient magnetic field. For operation in the Earth's magnetic field, the critical width is about 6 micrometers (.mu.m). When made with film widths of about 4 .mu.m an inventive high transition-temperature, superconducting quantum interference device (SQUID) excluded magnetic flux vortices up to a threshold ambient magnetic field of about 100 microTesla (.mu.T). SQUIDs were fabricated having several different film strip patterns. When the film strip width was kept at about 4 .mu.m, the SQUIDs exhibited essentially no increase in low-frequency noise, even when cooled in static magnetic fields of magnitude up to 100 .mu.T. Furthermore, the mutual inductance between the inventive devices and a seven-turn spiral coil was at least 85% of that for inductive coupling to a conventional SQUID.

Dantsker, Eugene (Torrance, CA); Clarke, John (Berkeley, CA)

2000-01-01T23:59:59.000Z

102

High level white noise generator  

DOE Patents (OSTI)

A wide band, stable, random noise source with a high and well-defined output power spectral density is provided which may be used for accurate calibration of Johnson Noise Power Thermometers (JNPT) and other applications requiring a stable, wide band, well-defined noise power spectral density. The noise source is based on the fact that the open-circuit thermal noise voltage of a feedback resistor, connecting the output to the input of a special inverting amplifier, is available at the amplifier output from an equivalent low output impedance caused by the feedback mechanism. The noise power spectral density level at the noise source output is equivalent to the density of the open-circuit thermal noise or a 100 ohm resistor at a temperature of approximately 64,000 Kelvins. The noise source has an output power spectral density that is flat to within 0.1% (0.0043 db) in the frequency range of from 1 KHz to 100 KHz which brackets typical passbands of the signal-processing channels of JNPT's. Two embodiments, one of higher accuracy that is suitable for use as a standards instrument and another that is particularly adapted for ambient temperature operation, are illustrated in this application.

Borkowski, Casimer J. (Oak Ridge, TN); Blalock, Theron V. (Knoxville, TN)

1979-01-01T23:59:59.000Z

103

Phase and Amplitude Noise Measurements  

Science Conference Proceedings (OSTI)

... 1/f, “flicker” behavior, which often significantly dominates over the white-noise level ... A paper published by Archita Hati and others addresses two ...

2010-10-05T23:59:59.000Z

104

Quantum noise in photothermal cooling  

SciTech Connect

We study the problem of cooling a mechanical oscillator using the photothermal (bolometric) force. Contrary to previous attempts to model this system, we take into account the noise effects due to the granular nature of photon absorption. We achieve this by developing a Langevin formalism for the motion of the cantilever, valid in the bad-cavity limit, which includes both photon absorption shot noise and the noise due to radiation pressure. This allows us to tackle the cooling problem down to the noise-dominated regime and to find reasonable estimates for the lowest achievable phonon occupation in the cantilever.

De Liberato, Simone [Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan); Lambert, Neill [Advanced Science Institute, RIKEN, Wako-shi, Saitama 351-0198 (Japan); Nori, Franco [Advanced Science Institute, RIKEN, Wako-shi, Saitama 351-0198 (Japan); Physics Department, University of Michigan, Ann Arbor, Michigan 48109 (United States)

2011-03-15T23:59:59.000Z

105

The Physics of Traffic and Regional Development  

E-Print Network (OSTI)

This contribution summarizes and explains various principles from physics which are used for the simulation of traffic flows in large street networks, the modeling of destination, transport mode, and route choice, or the simulation of urban growth and regional development. The methods stem from many-particle physics, from kinetic gas theory, or fluiddynamics. They involve energy and entropy considerations, transfer the law of gravity, apply cellular automata and require methods from evolutionary game theory. In this way, one can determine interaction forces among driver-vehicle units, reproduce breakdowns of traffic including features of synchronized congested flow, or understand changing usage patterns of alternative roads. One can also describe daily activity patterns based on decision models, simulate migration streams, and model urban growth as a particular kind of aggregation process.

Helbing, Dirk

2013-01-01T23:59:59.000Z

106

FPGA Based Real-time Network Traffic Analysis using Traffic Dispersion Patterns  

SciTech Connect

The problem of Network Traffic Classification (NTC) has attracted significant amount of interest in the research community, offering a wide range of solutions at various levels. The core challenge is in addressing high amounts of traffic diversity found in today's networks. The problem becomes more challenging if a quick detection is required as in the case of identifying malicious network behavior or new applications like peer-to-peer traffic that have potential to quickly throttle the network bandwidth or cause significant damage. Recently, Traffic Dispersion Graphs (TDGs) have been introduced as a viable candidate for NTC. The TDGs work by forming a network wide communication graphs that embed characteristic patterns of underlying network applications. However, these patterns need to be quickly evaluated for mounting real-time response against them. This paper addresses these concerns and presents a novel solution for real-time analysis of Traffic Dispersion Metrics (TDMs) in the TDGs. We evaluate the dispersion metrics of interest and present a dedicated solution on an FPGA for their analysis. We also present analytical measures and empirically evaluate operating effectiveness of our design. The mapped design on Virtex-5 device can process 7.4 million packets/second for a TDG comprising of 10k flows at very high accuracies of over 96%.

Khan, F; Gokhale, M; Chuah, C N

2010-03-26T23:59:59.000Z

107

Holographic Noise in Interferometers  

E-Print Network (OSTI)

General arguments based on black hole physics suggest the possibility of a new kind of indeterminacy in the relative position of bodies in spacetime, corresponding to the diffraction limit of Planck wavelength radiation. Suitably designed instruments should display a new phenomenon, a randomly varying shear in relative position, with a flat power spectral density at low frequencies given approximately by the Planck time, and with no other parameters. An effective theory is presented to connect fundamental theory with macroscopic phenomena, such as the statistical properties of noise in signals of interferometers. A theory of spacetime wavefunctions based on the paraxial wave equation with a carrier wave at the Planck frequency, or equivalently a Schrodinger wave equation, is motivated by a particular interpretation of Matrix theory in the macroscopic limit. A model based on gaussian-beam solutions of this equation is used to derive formulas in the time and frequency domain for autocorrelation of beamsplitter ...

Hogan, Craig J

2009-01-01T23:59:59.000Z

108

Correcting Specular Noise in Multiple Images of Photographed Documents  

Science Conference Proceedings (OSTI)

Portable digital cameras have become omnipresent. Their low-lost, simplicity to use, flexibility, and good quality images have widened their applicability far beyond their original purpose of taking personal photos. Every day people discover new uses ... Keywords: specular noise, photographed documents, multiple images

Ednardo Mariano; Rafael Dueire Lins; Gabriel de. Franca Pereira e. Silva; Jian Fan; Peter Majewicz; Marcelo Thielo

2011-09-01T23:59:59.000Z

109

Traffic flow wide-area surveillance system definition  

SciTech Connect

Traffic Flow Wide-Area Surveillance (TFWAS) is a system for assessing the state of traffic flow over a wide area for enhanced traffic control and improved traffic management and planning. The primary purpose of a TFWAS system is to provide a detailed traffic flow description and context description to sophisticated traffic management and control systems being developed or envisioned for the future. A successful TFWAS system must possess the attributes of safety, reconfigurability, reliability, and expandability. The primary safety premise of TFWAS is to ensure that no action or failure of the TFWAS system or its components can result in risk of injury to humans. A wide variety of communication techniques is available for use with TFWAS systems. These communication techniques can be broken down into two categories, landlines and wireless. Currently used and possible future traffic sensing technologies have been examined. Important criteria for selecting TFWAS sensors include sensor capabilities, costs, operational constraints, sensor compatibility with the infrastructure, and extent. TFWAS is a concept that can take advantage of the strengths of different traffic sensing technologies, can readily adapt to newly developed technologies, and can grow with the development of new traffic control strategies. By developing innovative algorithms that will take information from a variety of sensor types and develop descriptions of traffic flows over a wide area, a more comprehensive understanding of the traffic state can be provided to the control system to perform the most reasonable control actions over the entire wide area. The capability of characterizing the state of traffic over an entire region should revolutionize developments in traffic control strategies.

Allgood, G.O.; Ferrell, R.K.; Kercel, S.W.; Abston, R.A.; Carnal, C.L. [Oak Ridge National Lab., TN (United States); Moynihan, P.I. [Jet Propulsion Lab., Pasadena, CA (United States)

1994-11-01T23:59:59.000Z

110

A shared data environment for the Military Traffic Management Command Directorate of International Traffic  

SciTech Connect

In September 1991, Oak Ridge National Laboratory (ORNL) completed tasking to assist the Military Traffic Management Command Directorate of International Traffic (MTIT) in the analysis of a potential Shared Data Environment (SDE) for MTIT automated cargo traffic systems. This analysis was a preliminary effort with emphasis on documentation of requirements, examination of design alternatives, and identification of specific MTIT systems' data sharing problems. This report records the results of the ORNL analysis. The SDE envisioned by ORNL at this point in the analysis is not merely a repository of information; it is also a system that allows processing of distributed data. To provide high-level access to and control over international cargo processes, ORNL recommends a loosely coupled, replicated database design with high-speed communications among all sites.

Russell, D.L.; Wheeler, V.V. (Tennessee Univ., Knoxville, TN (United States)); Truett, L.F. (Oak Ridge National Lab., TN (United States))

1992-01-01T23:59:59.000Z

111

A shared data environment for the Military Traffic Management Command Directorate of International Traffic  

SciTech Connect

In September 1991, Oak Ridge National Laboratory (ORNL) completed tasking to assist the Military Traffic Management Command Directorate of International Traffic (MTIT) in the analysis of a potential Shared Data Environment (SDE) for MTIT automated cargo traffic systems. This analysis was a preliminary effort with emphasis on documentation of requirements, examination of design alternatives, and identification of specific MTIT systems` data sharing problems. This report records the results of the ORNL analysis. The SDE envisioned by ORNL at this point in the analysis is not merely a repository of information; it is also a system that allows processing of distributed data. To provide high-level access to and control over international cargo processes, ORNL recommends a loosely coupled, replicated database design with high-speed communications among all sites.

Russell, D.L.; Wheeler, V.V. [Tennessee Univ., Knoxville, TN (United States); Truett, L.F. [Oak Ridge National Lab., TN (United States)

1992-01-01T23:59:59.000Z

112

FAA Air Traffic Organization Safety Management | Department of Energy  

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

FAA Air Traffic Organization Safety Management FAA Air Traffic Organization Safety Management FAA Air Traffic Organization Safety Management September 20, 2012 Presenter: Mark DeNicuolo, Manager Performance and Analyses Air Traffic Organization Safety and Technical Training Federal Aviation Administration Topics Covered: En Route centers handle 40.5 million aircraft per year FAA/contract towers handle: - 51.2 million airport operations - 39 million instrument operations 732 million passenger enplanements Over 5,000 civil, public-use airports Approximately 33,300 ATO employees - More than 15,000 air traffic controllers - More than 7,000 technicians and engineers 21 ARTCCs, 513 ATCTs, 17 FSSs, 3 AFSSs FAA Air Traffic Organization Safety Management More Documents & Publications FAQS Reference Guide - Aviation Manager

113

Florida County Seeks to Reduce Emissions and Improve Traffic | Department  

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

Florida County Seeks to Reduce Emissions and Improve Traffic Florida County Seeks to Reduce Emissions and Improve Traffic Florida County Seeks to Reduce Emissions and Improve Traffic September 27, 2010 - 10:30am Addthis A worker synchronizes a traffic light on State Road A1A in St. Augustine, FL. | Energy Department Photo | A worker synchronizes a traffic light on State Road A1A in St. Augustine, FL. | Energy Department Photo | Lindsay Gsell What does this project do? St. Johns County, Florida uses Recovery Act funding to resynchronize 23 traffic signals at five major segments of roadway. The new light patterns will save nearly 729,000 gallons of gas and reduce CO2 emissions by more than 2,200 metric tons. The intersection of State Road A1A and State Road 312 in St. Augustine is messy at 5 o'clock. On one side, tourists returning from Florida's

114

Low noise control valve  

SciTech Connect

Noise is one of the problems associated with the use of any type of control valve in systems involving the flow of fluids. The advent of OSHA standards has prompted control valve manufacturers to design valves with special trim to lower the sound pressure level to meet these standards. However, these levels are in some cases too high, particularly when a valve must be located in or near an area where people are working at tasks requiring a high degree of concentration. Such locations are found around and near research devices and in laboratory-office areas. This paper describes a type of fluid control device presently being used at PPL as a bypass control valve in deionized water systems and designed to reduce sound pressure levels considerably below OSHA standards. Details of the design and construction of this constant pressure drop variable flow control valve are contained in the text and are shown in photographs and drawings. Test data taken are included. (auth)

Christie, R.S.

1975-01-01T23:59:59.000Z

115

Application and numerical investigation of wavelet transform for traffic data denoising  

Science Conference Proceedings (OSTI)

Good fitting of traffic data is important to traffic study because initial and boundary conditions of dynamic traffic models and relationships among traffic variables are dependent on the calibration of data. In this paper, a denoising method of traffic ... Keywords: data preprocessing, daubechies wavelets, denoise, speed-density relation, wavelet transform

Shih-Ching Lo; Chih-Ku Fan

2004-04-01T23:59:59.000Z

116

RENETO, a realistic network traffic generator for OMNeT++/INET  

Science Conference Proceedings (OSTI)

We present in this paper RENETO, a packet-level traffic generator for OMNeT++/INET. In order to achieve realistic traffic behavior, a first tool computes a model by doing an automatic analysis of a real traffic capture. This analysis extracts statistical ... Keywords: network traffic generation, network traffic modeling, pseudo-random number generation

Fabien Geyer, Stefan Schneele, Georg Carle

2013-03-01T23:59:59.000Z

117

Multi-hour network planning based on domination between sets of traffic matrices  

Science Conference Proceedings (OSTI)

In multi-hour network design, periodic traffic variations along time are considered in the dimensioning process. Then, the non coincidence of traffic peaks along the day or the week can be exploited. This paper investigates the application of the traffic ... Keywords: Multi-hour traffic, Network planning, Traffic domination

P. Pavon-Marino; B. Garcia-Manrubia; R. Aparicio-Pardo

2011-02-01T23:59:59.000Z

118

Avista Utilities - LED Traffic Signal Incentive Program (Washington...  

Open Energy Info (EERE)

with form History Share this page on Facebook icon Twitter icon Avista Utilities - LED Traffic Signal Incentive Program (Washington) This is the approved revision of this...

119

Problem Sets: Fundamentals Of Transportation And Traffic Operations  

E-Print Network (OSTI)

P ROBLEM S ETS : Fundamentals of Transportation and TrafficCN-98-1 February, 1998 Fundamentals of Transportation andcomprise a supplement to Fundamentals of Transportation and

Daganzo, Carlos F.

1998-01-01T23:59:59.000Z

120

Avista Utilities - LED Traffic Signal Incentive Program (Idaho...  

Open Energy Info (EERE)

LED Traffic Signal Incentive Program offers a variety of incentives based on annual energy savings for customer LED retrofits. Avista's website has an incentive table that...

Note: This page contains sample records for the topic "quality noise traffic" 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

V-201: Cisco Intrusion Prevention System SSP Fragmented Traffic...  

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

of the code that processes fragmented traffic could allow an unauthenticated, remote attacker to cause the Analysis Engine process to become unresponsive or cause the...

122

Analysis of Traffic Scheduling Technique for Smart Grid Mesh ...  

Science Conference Proceedings (OSTI)

Analysis of Traffic Scheduling Technique for Smart Grid Mesh Networks ... In this paper, we present a multi-gate mesh network architecture that has ...

2012-01-03T23:59:59.000Z

123

Classical approaches to predicting industrial noise  

Science Conference Proceedings (OSTI)

Predicting operational noise levels is an essential part of designing an industrial facility. Community noise levels are usually predicted for environmental assessment and licensing. In?plant noise levels are predicted

Frank H. Brittain

1992-01-01T23:59:59.000Z

124

Uncorrelated Noise in Turbulence Measurements  

Science Conference Proceedings (OSTI)

We show that the error variance contributed by random uncorrelated measurement noise can be merged with the error variance contributed by real variations in the atmosphere to obtain a single expression for the total error variance when the ...

Donald H. Lenschow; Leif Kristensen

1985-03-01T23:59:59.000Z

125

Heavy Traffic Analysis for EDF Queues with  

E-Print Network (OSTI)

This paper presents a heavy-traffic analysis of the behavior of a single-server queue under an Earliest-Deadline-First (EDF) scheduling policy, in which customers have deadlines and are served only until their deadlines elapse. The performance of the system is measured by the fraction of reneged work (the residual work lost due to elapsed deadlines), which is shown to be minimized by the EDF policy. The evolution of the lead time distribution of customers in queue is described by a measure-valued process. The heavy traffic limit of this (properly scaled) process is shown to be a deterministic function of the limit of the scaled workload process, which, in turn, is identified to be a doubly reflected Brownian motion. This paper complements previous work by Doytchinov, Lehoczky and Shreve on the EDF discipline, in which customers are served to completion even after their deadlines elapse. The fraction of reneged work in a heavily loaded system and the fraction of late work in the corresponding system without reneging are compared using explicit formulas based on the heavy

John Lehoczky; Kavita Ramanan; Steven Shreve

2007-01-01T23:59:59.000Z

126

Virtual cityscapes: recent advances in crowd modeling and traffic simulation  

Science Conference Proceedings (OSTI)

We survey our recent work on interactive modeling, generation, and control of large-scale crowds and traffic for simulating digital cities. These include multi-agent navigation, simulating large crowds with emerging behaviors as well as interactive simulation ... Keywords: continuum traffic, crowd modeling, digital cities, multi-agent simulation

Ming C. Lin; Dinesh Manocha

2010-09-01T23:59:59.000Z

127

LED traffic signals: A market transformation opportunity assessment  

SciTech Connect

This report examines the feasibility and appropriateness of market intervention strategies to increase the penetration of LED traffic signals, which offer large energy savings and other benefits relative to existing incandescent traffic signals. It presents the state of the technology and some of the technical challenges that remain. Prepared for the Consortium for Energy Efficiency.

Suozzo, M.

1998-12-31T23:59:59.000Z

128

Measuring UAS pilot responses to common air traffic clearances  

Science Conference Proceedings (OSTI)

Using a simulated ground control station, this study documents the methods for measuring the verbal response and execution time of unmanned aerial system (UAS) pilots to direct commands from air traffic controllers (ATCos). Although prior research has ... Keywords: air traffic management, measured response, unmanned aerial systems

Jason Ziccardi, Zach Roberts, Ryan O'Connor, Conrad Rorie, Gregory Morales, Vernol Battiste, Thomas Strybel, Dan Chiappe, Kim-Phuong L. Vu, Jay Shively

2013-07-01T23:59:59.000Z

129

Variable selection and ranking for analyzing automobile traffic accident data  

Science Conference Proceedings (OSTI)

Variable ranking and feature selection are important concepts in data mining and machine learning. This paper introduces a new variable ranking technique named Sum Max Gain Ratio (SMGR). The new technique is evaluated within the domain of traffic accident ... Keywords: decision tree, traffic accident data, variable and feature selection, variable ranking

Huanjing Wang; Allen Parrish; Randy K. Smith; Susan Vrbsky

2005-03-01T23:59:59.000Z

130

A traffic shaping optimization methodology for web systems  

Science Conference Proceedings (OSTI)

In recent years, computer networks have been characterized by heterogeneous traffic and dynamic management of different kinds of services. The web and network requirements have increased within time and, since bandwidth is limited, it becomes necessary ... Keywords: QoS, internet services, optimization, traffic shaping, world wide web

Caio Mesquita, Ulisses Cavalca, Adriano C.M. Pereira, Eduardo G. Carrano

2013-11-01T23:59:59.000Z

131

Traffic Flow Measurement: Experiences with NeTraMet  

Science Conference Proceedings (OSTI)

This memo records experiences in implementing and using the Traffic Flow Measurement Architecture and Meter MIB. It discusses the implementation of NeTraMet (a traffic meter) and NeMaC (a combined manager and meter reader), considers the writing of ...

N. Brownlee

1997-03-01T23:59:59.000Z

132

Traffic modeling of player action categories in a MMORPG  

Science Conference Proceedings (OSTI)

In this paper we present a user action specific modeling of network traffic in a Massively Multiplayer Online Role-Playing Game (MMORPG). We have performed measurements for each of the previously defined action categories for MMORPGs (Trading, Questing, ... Keywords: MMORPG, World of Warcraft, modeling, traffic

Mirko Suznjevic; Ivana Stupar; Maja Matijasevic

2011-03-01T23:59:59.000Z

133

LIGHT EMITTING DIODE (LED) TRAFFIC SIGNAL SURVEY RESULTS  

E-Print Network (OSTI)

CALIFORNIA ENERGY COMMISSION LIGHT EMITTING DIODE (LED) TRAFFIC SIGNAL SURVEY RESULTS STAFFREPORT: Assistance needs 26 Item 12: Information requested 28 Appendix A: Light Emitting Diode (LED) Traffic Signal efficiency upgrades. - 29 - #12;APPENDIX A - 30 - #12;California Energy Commission Light Emitting Diode (LED

134

Wireless mesh network security: A traffic engineering management approach  

Science Conference Proceedings (OSTI)

The wireless mesh network (WMN) is an emerging multihop, heterogeneous, easily scalable and low cost network. The architecture of the WMN is a connectionless-oriented, mobile and dynamic traffic of routed packets. The mesh infrastructure environment ... Keywords: IPSec, MPLS, Security, Traffic engineering, VPN, Wireless mesh networks

Okechukwu E. Muogilim; Kok-Keong Loo; Richard Comley

2011-03-01T23:59:59.000Z

135

Quality Control of Accumulated Fields by Applying Spatial and Temporal Constraints  

Science Conference Proceedings (OSTI)

Accumulating gridded fields over time greatly magnifies the impact of impulse noise in the individual grids. A quality control method that takes advantage of spatial and temporal coherence can reduce the impact of such noise in accumulation grids. ...

Valliappa Lakshmanan; Madison Miller; Travis Smith

2013-04-01T23:59:59.000Z

136

Ohio Town Installing 'Green' Traffic Signals | Department of Energy  

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

Ohio Town Installing 'Green' Traffic Signals Ohio Town Installing 'Green' Traffic Signals Ohio Town Installing 'Green' Traffic Signals January 20, 2010 - 3:57pm Addthis Elyria, Ohio, is getting a little greener. Mayor William M. Grace recently confirmed that staff will replace traditional traffic lights with 288 energy-efficient LEDs (light-emitting diodes), saving the town energy and money. "We are definitely doing this, we are going to switch out all the traffic lights in town," Elyria's mayor says. Replacing light bulbs with LEDs will mean substantial savings. That's because these small, solid bulbs can last up to 10 times longer than traditional lights and require considerably less energy. "This gives us the opportunity to change, we expect to realize considerable savings," the mayor says.

137

Self-organizing traffic lights at multiple-street intersections  

E-Print Network (OSTI)

Summary: Traffic light coordination is a complex problem. In this paper, we extend previous work on an abstract model of city traffic to allow for multiple street intersections. We test a self-organizing method in our model, showing that it is close to theoretical optima and superior to a traditional method of traffic light coordination. Abstract: The elementary cellular automaton following rule 184 can mimic particles flowing in one direction at a constant speed. This automaton can therefore model highway traffic. In a recent paper, we have incorporated intersections regulated by traffic lights to this model using exclusively elementary cellular automata. In such a paper, however, we only explored a rectangular grid. We now extend our model to more complex scenarios employing an hexagonal grid. This extension shows first that our model can readily incorporate multiple-way intersections and hence simulate complex scenarios. In addition, the current extension allows us to study and evaluate the behavior of two...

Gershenson, Carlos

2011-01-01T23:59:59.000Z

138

Traffic Safety Among Latino Populations in California: Current Status and Policy Recommendations  

E-Print Network (OSTI)

the insufficient number of street lights and stop signs tostreet without paying any attention to the traffic lightsstreet without paying any attention to the traffic lights

Cooper, Jill F; Wilder, Tammy R; Lankina, Elena; Geyer, Judy A; Ragland, David R

2005-01-01T23:59:59.000Z

139

Genetic fuzzy logic approach to local ramp metering control using microscopic traffic simulation.  

E-Print Network (OSTI)

??Ramp metering, one of the most effective solutions for improving motorway traffic flows, is playing increasingly important role in traffic management systems. Because of its… (more)

Yu, Xue Feng

2009-01-01T23:59:59.000Z

140

Noise Characterization of ATLAS Tile Calorimeter Readout System  

E-Print Network (OSTI)

Architect 3. Design noise filter Design noise filter circuit Simulate circuit using Design Architect 4

Note: This page contains sample records for the topic "quality noise traffic" 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

Beating the traffic with commuting alternatives  

Science Conference Proceedings (OSTI)

This pamphlet describes how, by encouraging commuting options, local governments can help reduce air pollution, fuel consumption, and traffic congestion. Minimizing these problems makes the community more appealing to businesses, residents, and visitors and boosts the local economy. Approaches to alternative transportation are as varied as the communities devising and using them. But the critical factor is initiative from local governments, often one of communities largest employers. They can use and promote commuting alternatives among their employees. Local governments can also promote alternative transportation among other employers and the general public. They can provide information on commuting options, improve the infrastructure, and use local authority to require and reward those changes necessary to make alternative transportation a widely accepted part of community life. Best of all, local governments can lead by example and establish a template for other employers to follow.

NONE

1995-05-01T23:59:59.000Z

142

Geometry features measurement of traffic accident for reconstruction based on close-range photogrammetry  

Science Conference Proceedings (OSTI)

This paper studies the feasibility of investigating a traffic accident and offering initial data for traffic accident reconstruction (TAR) using a photogrammetric technique. Compared with the conventional roller tape applied by the traffic police of ... Keywords: Accident reconstruction, Close-range photogrammetry, Direct linear transformation, Traffic accident scene, Vehicle deformation

Xinguang Du; Xianlong Jin; Xiaoyun Zhang; Jie Shen; Xinyi Hou

2009-07-01T23:59:59.000Z

143

Mitigating Complexity in Air Traffic Control: The Role of Structure-Based Abstractions  

E-Print Network (OSTI)

Cognitive complexity is a limiting factor on the capacity and efficiency of the Air Traffic Control

Hansman, R. John

144

Preventing Theft of Quality of Service on Open Platforms  

E-Print Network (OSTI)

As multiple types of traffic converge onto one network, frequently wireless, enterprises face a tradeoff between effectiveness and security. Some types of traffic, such as voice-over-IP (VoIP), require certain quality of service (QoS) guarantees to be effective. The end client platform is in the best position to know which packets deserve this special handling. In many environments (such as universities), end users relish having control over their own machines. However, if end users administer their own machines, nothing stops dishonest ones from marking undeserving traffic for high QoS. How can an enterprise ensure that only appropriate traffic receives high QoS, while also allowing end users to retain control over their own machines? In this paper, we present the design and prototype of a solution, using SELinux, TCPA/TCG hardware, Diffserv, 802.1x, and EAP-TLS.

Kwang-Hyun Baek; Sean W. Smith

2005-01-01T23:59:59.000Z

145

The digits-in-noise test: Assessing auditory speech recognition abilities in noise  

Science Conference Proceedings (OSTI)

A speech-in-noise test which uses digit triplets in steady-state speech noise was developed. The test measures primarily the auditory

Cas Smits; S. Theo Goverts; Joost M. Festen

2013-01-01T23:59:59.000Z

146

LED Traffic Lights Get Buy American Stamp | Department of Energy  

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

LED Traffic Lights Get Buy American Stamp LED Traffic Lights Get Buy American Stamp LED Traffic Lights Get Buy American Stamp November 30, 2010 - 10:19am Addthis Red. Yellow. Green. What LED traffic signals don't say: Made in USA. That is changing. Dialight Corporation, an LED lighting manufacturer with U.S. corporate offices in Farmingdale, New Jersey, and a parent company based in the U.K., invested nearly $3 million into renovating their 75,000-square-foot production facility in Roxboro, North Carolina. With these improvements, Dialight's Roxboro plant is projected to scale up production by 400 percent. "Bringing manufacturing back to America is a win-win scenario," said Roy Burton, Dialight's Group Chief Executive. "We're helping the economy by creating new jobs, and at the same time we're finding it more

147

TRANSPORTATION AND TRAFFIC MANAGEMENT QUALIFICATION STANDARD REFERENCE GUIDE  

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

Transportation Transportation & Traffic Management Qualification Standard Reference Guide APRIL 2010 This page is intentionally blank. i LIST OF FIGURES ...................................................................................................................... ii LIST OF TABLES ........................................................................................................................ ii ACRONYMS ................................................................................................................................ iv PURPOSE...................................................................................................................................... 1 SCOPE ...........................................................................................................................................

148

Distributed Air Traffic Control : A Human Safety Perspective  

E-Print Network (OSTI)

The issues in air traffic control have so far been addressed with the intent to improve resource utilization and achieve an optimized solution with respect to fuel comsumption of aircrafts, efficient usage of the available airspace with minimal congestion related losses under various dynamic constraints. So the focus has almost always been more on smarter management of traffic to increase profits while human safety, though achieved in the process, we believe, has remained less seriously attended. This has become all the more important given that we have overburdened and overstressed air traffic controllers managing hundreds of airports and thousands of aircrafts per day. We propose a multiagent system based distributed approach to handle air traffic ensuring complete human (passenger) safety without removing any humans (ground controllers) from the loop thereby also retaining the earlier advantages in the new solution. The detailed design of the agent system, which will be easily interfacable with the existin...

Nikumbh, Sarvesh; Vartak, Rahul

2011-01-01T23:59:59.000Z

149

Modeling the air traffic controller's cognitive projection process  

E-Print Network (OSTI)

Cognitive projection enables the operator of a supervisory control system, such as air traffic control, to use predicted future behavior of the system to make decisions about if and how to control the system. New procedures ...

Reynolds, Hayley J. Davison (Hayley Jaye Davison)

2006-01-01T23:59:59.000Z

150

Concept development and evaluation of airborne traffic displays  

E-Print Network (OSTI)

A system concept for a cockpit traffic situation display (TSD) was developed and a preliminary evaluation was undertaken to investigate the effect of a TSD on safety, efficiency, and capacity in the 3rd generation NAS/ARTS ...

Imrich, Thomas

1971-01-01T23:59:59.000Z

151

Improving the interaction between overlay routing and traffic engineering  

Science Conference Proceedings (OSTI)

Overlay routing has been successful as an incremental method to improve Internet routing by allowing its own users to select their logical routing. In the meantime, traffic engineering (TE) are being used to reduce the whole network cost by adapting ...

Gene Moo Lee; Taehwan Choi

2008-05-01T23:59:59.000Z

152

On the Convergence of Multiclass Queueing Networks in Heavy Traffic  

E-Print Network (OSTI)

The subject of this paper is the heavy traffic behavior of a general class of queueing networks with first-in-first-out (FIFO) service discipline. For special cases which require various assumptions on the network structure, ...

Dai, I. G.

153

Polymer delineation system. [Patent application: traffic lane lines  

DOE Patents (OSTI)

A delineation system (traffic lane lines) for highways is described in which polymerizable substances are applied to existing or newly prepared highway pavements. The substances would contain a suitable pigment and may incorporate reflective elements.

Woolman, S.; Steinberg, M.

1975-06-24T23:59:59.000Z

154

Decentralized Traffic Management Strategies for Sensor-Enabled Cars  

E-Print Network (OSTI)

Traffic Congestions and accidents are major concerns in today's transportation systems. This thesis investigates how to optimize traffic flow on highways, in particular for merging situations such as intersections where a ramp leads onto the highway. In our work, cars are equipped with sensors that can detect distance to neighboring cars, and communicate their velocity and acceleration readings with one another. Sensor-enabled cars can locally exchange sensed information about the traffic and adapt their behavior much earlier than regular cars. We propose proactive algorithms for merging different streams of sensor-enabled cars into a single stream. A proactive merging algorithm decouples the decision point from the actual merging point. Sensor-enabled cars allow us to decide where and when a car merges before it arrives at the actual merging point. This leads to a significant improvement in traffic flow as velocities can be adjusted appropriately. We compare proactive merging algorithms against the conventio...

Wang, Ziyuan; Ramamohanarao, Kotagiri

2009-01-01T23:59:59.000Z

155

Real-Time Traffic Information for Emergency Evacuations  

Science Conference Proceedings (OSTI)

There are many instances in which it is possible to plan ahead for an emergency evacuation (e.g., a chemical processing facility explosion). For those cases, if an accident were to happen, then the best evacuation plan for the prevailing network and weather conditions would be deployed. In other cases (e.g., the derailment of a train transporting hazardous materials), there may not be any previously developed plan to be implemented, and decisions must be made ad-hoc on how to proceed with an emergency evacuation. In both situations, the availability of real-time traffic information plays a critical role in the management of the evacuation operations. Due to cost constraints, only large urban areas have traffic sensor deployments that permit access to some sort of real-time traffic information; an evacuation taking place in other areas of the country would have to proceed without real-time traffic information. In order to improve operations during a vehicular emergency evacuation anywhere, a system of sensors that uses newly developed real-time traffic-information-gathering technologies to assess traffic conditions and to detect incidents on the main evacuation routes is presented in this paper. A series of tests, both in a controlled environment and in the field, were conducted to study the feasibility of such a system of traffic sensors and to assess its ability to provide real-time traffic information during an emergency evacuation. The results of these tests indicated that the prototype sensors are reliable and accurate for the type of application that is the focus of this paper.

Franzese, Oscar [ORNL; Zhang, Li [Mississippi State University (MSU); Mahmoud, Anas M. [Mississippi State University (MSU)

2010-01-01T23:59:59.000Z

156

Intelligent Cruise Control design based on a traffic flow specification  

E-Print Network (OSTI)

The principal objectives of the Automated Highway graphics. System (AHS), an Intelligent Transportation System (ITS) technology, are to increase the safety and through-put of the existing highway by traffic automation. Advanced Vehicle Control Systems (AVCS) play a key role in traffic automation. Central to the Development of AVCS for vehicles is the design of an Intelligent Cruise Control (ICC) system that automates the task of maintaining a safe following distance. A properly designed ICC system has the potential to smooth traffic flows and increase the traffic flow capacity of the existing highway. Near term applications of AVCS cannot rely on communication between vehicles to maintain a safe following system. In an Autonomous Intelligent Cruise Control (AICC) Systems, the throttle and brake are controlled by a computer based on onboard sensory information, and the steering task is manually controlled. AICC systems proposed so far do not consider their impact on the traffic flow stability. In this thesis, an AICC system is synthesized from a traffic flow specification on stability and capacity. Analytical results of this thesis are verified by numerical simulations.

Huandra, Rusli

1998-01-01T23:59:59.000Z

157

Water Quality  

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

Water Quality Water Quality We protect water quality through stormwater control measures and an extensive network of monitoring wells and stations encompassing groundwater, surface...

158

Simulation of synchrotron motion with rf noise  

Science Conference Proceedings (OSTI)

The theoretical formulation is described that is behind an algorithm for synchrotron phase-space tracking with rf noise and some preliminary simulation results of bunch diffusion under rf noise obtained by actual tracking.

Leemann, B.T.; Forest, E.; Chattopadhyay, S.

1986-08-01T23:59:59.000Z

159

Quantization Noise Shaping on Arbitrary Frame Expansions  

E-Print Network (OSTI)

Quantization noise shaping is commonly used in oversampled A/D and D/A converters with uniform sampling. This paper considers quantization noise shaping for arbitrary finite frame expansions based on generalizing the view ...

Boufounos, Petros T.

160

The room noise criteria (RNC) metric.  

Science Conference Proceedings (OSTI)

The recent ANSI S12.2:2008 room noise criteria contains both a survey and an engineering method to specify room noise criteria. The methods use A?weighting and extended NC

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quality noise traffic" 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

EMISSION AND TRANSMISSION NOISE PROPAGATION IN POSITRON EMISSION COMPUTED TOMOGRAPHY  

E-Print Network (OSTI)

26-29, 1979 EMISSION AND TRANSMISSION NOISE PROPAGATION INLBL-9783 EMISSION AND TRANSMISSION NOISE PROPAGATION INl·. LBL-9783 EMISSION AND TRANSMISSION NOISE PROPAGATION IN

Gullberg, G.T.

2010-01-01T23:59:59.000Z

162

Increasing Market Penetration of LED Traffic Signals in New York State Review of Articles and Information on LED Traffic Signals  

E-Print Network (OSTI)

A primary purpose of this review is to identify and summarize recently published information about the use and performance of light-emitting diode (LED) traffic signals. It consists of two sections: a synopsis of experiences of municipalities using LED traffic signals in 1999 and 2000, and a discussion of technical, economic and market issues surrounding the deployment of LED signals. This review includes articles and reports published in 1999 and 2000.

Bullough, J D; Bullough, John D.; Suozzo, Margaret

2002-01-01T23:59:59.000Z

163

Research on Aluminum Foam Railway Noise Barrier  

Science Conference Proceedings (OSTI)

Abstract Scope, Frequency ranges of train noises are concentrated between ... Piezoelectric Smart Composites: Electromechanical Properties and Design Maps

164

Noise Analysis of Statham Temperature Chamber  

SciTech Connect

A procedure is described to subdue the noise made by the LN2 control valve on a Statham Temperature Chamber.

Mielke, R. L.

1973-01-15T23:59:59.000Z

165

A case history comparing noise criteria.  

Science Conference Proceedings (OSTI)

A case history of an indoor HVAC noise problem in a new residential building will be presented. Noise measurements collected in the living room and in the bedroom of the impacted living unit will be examined using several of the available noise criteria methods including

2009-01-01T23:59:59.000Z

166

Environmental Noise Source Classification Using Neural Networks  

Science Conference Proceedings (OSTI)

Neural networks have been applied to many interesting problems in different areas including noise identification/recognition. With this study, we studied noise classification using artificial neural networks (ANN). Three commonly encountered non-stationary ... Keywords: ACF-based feature parameter, environmental noise classification, Neural Networks (ANN)

Buket D. Barkana; Inci Saricicek

2010-04-01T23:59:59.000Z

167

The Acoustic Properties of Different Noise Sources  

Science Conference Proceedings (OSTI)

This paper discusses a method to find the acoustic properties of different types of background noise: highway, airport, subway, restaurant, rain, inside a car, and inside a train. Four parameters are calculated using the Auto Correlation Function (ACF). ... Keywords: Environmental noise, noise classification

Jidong Yang; Buket D. Barkana

2009-04-01T23:59:59.000Z

168

Low-noise pulse conditioner  

DOE Patents (OSTI)

A low-noise pulse conditioner is provided for driving electronic digital processing circuitry directly from differentially induced input pulses. The circuit uses a unique differential-to-peak detector circuit to generate a dynamic reference signal proportional to the input peak voltage. The input pulses are compared with the reference signal in an input network which operates in full differential mode with only a passive input filter. This reduces the introduction of circuit-induced noise, or jitter, generated in ground referenced input elements normally used in pulse conditioning circuits, especially speed transducer processing circuits. This circuit may be used for conditioning the sensor signal from the Fidler coil in a gas centrifuge for separation of isotopic gaseous mixtures.

Bird, D.A.

1981-06-16T23:59:59.000Z

169

Quality Portal  

Science Conference Proceedings (OSTI)

... Measurement Quality Assurance Program , coordinated by ... see all Quality programs and projects ... ... Events. 2014 Examiner Training Schedule. NIST ...

2013-05-29T23:59:59.000Z

170

LED traffic lights: New technology signals major energy savings  

SciTech Connect

Using light-emitting diode technology to replace incandescent lamps in traffic signals promises energy savings upwards of 60 percent for each of the estimated quarter of a million controlled intersections in the United States. LED units use only 9 to 25 watts instead of the 67 to 150 watts used by each incandescent lamp. Though their first cost is relatively high, energy savings result in paybacks of 1 to 5 years. LED retrofit kits are available for red signal disks and arrows, and installations in several states have proven successful, although minor improvements are addressing concerns about varying light output and controller circuitry. Retrofitting green lamps is not yet feasible, because color standards of the Institute of Traffic Engineers cannot be met with existing LED technology. Yellow lamps have such low duty factors (they`re on only 3 percent of the time) that retrofitting with LED signals is not cost-effective. LEDs last much longer than incandescents, allowing municipalities to not only reduce their electricity bills, but to save on maintenance costs as well. As further incentive, some utilities are beginning to implement rebate programs for LED traffic signal retrofits. Full approval of LED units is still awaited from the Institute of Traffic Engineers (ITE), the standard-setting body for traffic safety devices. Local and state governments ultimately decide what specifications to require for traffic lights, and the growing body of successful field experience with LEDs appears to be raising their comfort level with the technology. The California Department of Transportation is developing an LED traffic light specification, and two California utilities, Southern California Edison and Pacific Gas and Electric, have provided rebates for some pilot installations.

Houghton, D.

1994-12-31T23:59:59.000Z

171

Coating thermal noise for arbitrary shaped beams  

E-Print Network (OSTI)

Advanced LIGO's sensitivity will be limited by coating noise. Though this noise depends on beam shape, and though nongaussian beams are being seriously considered for advanced LIGO, no published analysis exists to compare the quantitative thermal noise improvement alternate beams offer. In this paper, we derive and discuss a simple integral which completely characterizes the dependence of coating thermal noise on shape. The derivation used applies equally well, with minor modifications, to all other forms of thermal noise in the low-frequency limit.

Richard O'Shaughnessy

2006-07-10T23:59:59.000Z

172

Sustainable expansion of rail networks through noise reduction Research by engineers at the University of Southampton into reducing railway noise has  

E-Print Network (OSTI)

environmentally-friendly than most forms of transport. However, new rail projects around the world are underSustainable expansion of rail networks through noise reduction Research by engineers used to expand rail networks in Europe and Australia while preserving the quality of life for people

Sóbester, András

173

Attenuating Plant Noise: Active Noise Control Helmholtz Resonator Demonstration: Low Frequency Noise Mitigation  

Science Conference Proceedings (OSTI)

This report describes the implementation of the active Helmholtz resonator concept at a Midwestern power plant to suppress low frequency noise emitted from three simple-cycle, combustion turbine peaking units. The units normally operate during the summer season and only when electricity demand is very high (e.g., during periods with high ambient temperatures). However, when one or more of the units are dispatched, the plant sometimes receives complaints from the residential development located approximat...

2004-03-23T23:59:59.000Z

174

Transport growth in Bangkok: Energy, environment, and traffic congestion. Workshop proceedings  

Science Conference Proceedings (OSTI)

Bangkok, the capital of Thailand, is a physically and economically complexcity with a complicated transport system. With daily traffic congestion averaging 16 hours, the air quality is such that to breathe street level pollution for 8 eight hours is roughly equivalent to smoking nine cigarettes per day. Estimates suggest idling traffic costs up to $1.6 billion annually. Energy use within the transport sector is on a steady rise with an estimated increase in 11 years of two and one half times. Severe health impacts have begun to effect many residents - young children and the elderly being particularly vulnerable. Bangkok`s air quality and congestion problems are far from hopeless. Great potential exists for Bangkok to remedy its transport-related problems. The city has many necessary characteristics that allow an efficient, economical system of transport. For example, its high density level makes the city a prime candidate for an efficient system of mass transit and the multitude and close proximity of shops, street vendors, restaurants, and residential areas is highly conducive to walking and cycling. Technical knowledge and capacity to devise and implement innovative policies and projects to address air quality and congestion problems is plentiful. There is also consensus among Bangkokians that something needs to be done immediately to clear the air and the roads. However, little has been done. This report proposes a new approach to transport planning for Bangkok that integrates consideration of ecological, social, and financial viability in the process of making decisions regarding managing existing infrastructure and investments in new infrastructure. Selected papers have been indexed separately for inclusion in the Energy Science and Technology Database.

Philpott, J. [Asia Regional Office, Bangkok (Thailand)

1995-07-01T23:59:59.000Z

175

Modeling self-organizing traffic lights with elementary cellular automata  

E-Print Network (OSTI)

There have been several highway traffic models proposed based on cellular automata. The simplest one is elementary cellular automaton rule 184. We extend this model to city traffic with cellular automata coupled at intersections using only rules 184, 252, and 136. The simplicity of the model offers a clear understanding of the main properties of city traffic and its phase transitions. We use the proposed model to compare two methods for coordinating traffic lights: a green-wave method that tries to optimize phases according to expected flows and a self-organizing method that adapts to the current traffic conditions. The self-organizing method delivers considerable improvements over the green-wave method. For low densities, the self-organizing method promotes the formation and coordination of platoons that flow freely in four directions, i.e. with a maximum velocity and no stops. For medium densities, the method allows a constant usage of the intersections, exploiting their maximum flux capacity. For high dens...

Gershenson, Carlos

2009-01-01T23:59:59.000Z

176

Quality Assurance: Quality Policy  

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

Policy Policy It is the policy of the Department of Energy to establish quality requirements to ensure that risks and environmental impacts are minimized and that safety, reliability, and performance are maximized through the application of effective management systems commensurate with the risks posed by the facility or activity and its work. The Department implements this policy through the QA Order and the QA rule directives to ensure quality assurance requirements are clearly specified for the broad spectrum of work performed by DOE and its contractors. Objective The objective of the QA requirements are to establish an effective management system (i.e., quality assurance programs) using the performance requirements coupled technical standards where appropriate that ensure:

177

Laboratory to change vehicle traffic-screening regimen at vehicle  

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

Changes to vehicle traffic-screening Changes to vehicle traffic-screening Laboratory to change vehicle traffic-screening regimen at vehicle inspection station Lanes two through five will be open 24 hours a day and won't be staffed by a Laboratory protective force officer. September 1, 2009 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials. Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials.

178

State Traffic Safety Information - Fatal Single Vehicle Crashes : District  

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

District District of Columbia (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Single Vehicle Crashes : District of Columbia (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet

179

State Traffic Safety Information - Fatal Crashes Involving Speeding : Iowa  

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

Iowa Iowa (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving Speeding : Iowa (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet

180

State Traffic Safety Information - Fatal Crashes Involving a Large Truck :  

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

Indiana (2007-2009) Indiana (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving a Large Truck : Indiana (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness

Note: This page contains sample records for the topic "quality noise traffic" 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

State Traffic Safety Information - Fatal Crashes Involving a Large Truck :  

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

Idaho (2007-2009) Idaho (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving a Large Truck : Idaho (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet

182

State Traffic Safety Information - Fatal Crashes Involving Speeding :  

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

Kansas (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving Speeding : Kansas (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet

183

State Traffic Safety Information - Fatal Crashes Involving Speeding : Maine  

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

Maine Maine (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving Speeding : Maine (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet

184

State Traffic Safety Information - Fatal Crashes Involving Speeding :  

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

Illinois (2007-2009) Illinois (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving Speeding : Illinois (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet

185

State Traffic Safety Information - Fatal Crashes Involving a Large Truck :  

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

Hawaii (2007-2009) Hawaii (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving a Large Truck : Hawaii (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet

186

State Traffic Safety Information - Fatal Crashes Involving a Large Truck :  

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

Delaware (2007-2009) Delaware (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving a Large Truck : Delaware (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness

187

State Traffic Safety Information - Fatal Crashes Involving Speeding :  

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

Hawaii (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving Speeding : Hawaii (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility 0 No votes yet Usefulness 0 No votes yet

188

State Traffic Safety Information - Fatal Crashes Involving a Large Truck :  

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

District of Columbia (2007-2009) District of Columbia (2007-2009) Research Menu Data/Tools Apps Resources Let's Talk Research Alpha You are here Data.gov » Communities » Research » Data State Traffic Safety Information - Fatal Crashes Involving a Large Truck : District of Columbia (2007-2009) Dataset Summary Description The State Traffic Safety Information (STSI) portal is part of the larger Fatality Analysis Reporting System (FARS) Encyclopedia. STSI provides state-by-state traffic safety profiles, including: crash data, lives saved/savable, legislation, economic costs, grant funding, alcohol related crash data, performance measures, and geographic maps of crash data. Tags {geospatial,fatality,crash,data,safety,roadway,vehicle,human,person} Dataset Ratings Overall 0 No votes yet Data Utility

189

Multi-intersection Traffic Light Control Using Infinitesimal Perturbation Analysis  

E-Print Network (OSTI)

We address the traffic light control problem for multiple intersections in tandem by viewing it as a stochastic hybrid system and developing a Stochastic Flow Model (SFM) for it. Using Infinitesimal Perturbation Analysis (IPA), we derive on-line gradient estimates of a cost metric with respect to the controllable green and red cycle lengths. The IPA estimators obtained require counting traffic light switchings and estimating car flow rates only when specific events occur. The estimators are used to iteratively adjust light cycle lengths to improve performance and, in conjunction with a standard gradient-based algorithm, to obtain optimal values which adapt to changing traffic conditions. Simulation results are included to illustrate the approach.

Geng, Yanfeng

2012-01-01T23:59:59.000Z

190

Methods and systems for detecting abnormal digital traffic  

DOE Patents (OSTI)

Aspects of the present invention encompass methods and systems for detecting abnormal digital traffic by assigning characterizations of network behaviors according to knowledge nodes and calculating a confidence value based on the characterizations from at least one knowledge node and on weighting factors associated with the knowledge nodes. The knowledge nodes include a characterization model based on prior network information. At least one of the knowledge nodes should not be based on fixed thresholds or signatures. The confidence value includes a quantification of the degree of confidence that the network behaviors constitute abnormal network traffic.

Goranson, Craig A [Kennewick, WA; Burnette, John R [Kennewick, WA

2011-03-22T23:59:59.000Z

191

Why Los Alamos? Quality of life makes town "Best Of"  

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

call Los Alamos home because of its slower pace, low levels of crime, noise, and pollution. The beauty of the landscape mountain views, desert vistas, and the quality of...

192

Electron acceleration in solar noise storms  

E-Print Network (OSTI)

We present an up-to-date review of the physics of electron acceleration in solar noise storms. We describe the observed characteristics of noise storm emission, emphasizing recent advances in imaging observations. We briefly describe the general methodology of treating particle acceleration problems and apply it to the specific problem of electron acceleration in noise storms. We dwell on the issue of the efficiency of the overall noise storm emission process and outline open problems in this area. 1.1 Motivation: Noise storms are the most common form of meter wavelength radio emission from the solar corona. The nomenclature arises from hissing sounds produced in short-wave radio receivers, and was coined around the 1930s. Noise storms are sites of long-lasting quasi-continuous electron acceleration in the

Prasad Subramanian

2007-01-01T23:59:59.000Z

193

Small Vessel Contribution to Underwater Noise  

SciTech Connect

Understanding the types of noise generated by a small boat is important for ensuring that marine ecosystems are protected from detrimental anthropogenic noise. Here we present the results of a field test conducted to examine the effects of engine RPM, number of engines and number of propeller blades on the broadband and narrowband noise produced by a small boat. The test boat was a 23-foot aluminum-hulled boat with dual 100 hp engines. The broadband noise and narrowband peak levels were observed using two hydrophones in different locations. The broadband noise levels were affected by both the number of engines and the RPM; the narrowband peaks showed a greater increase in amplitude with an increase in RPM than the broadband noise levels.

Matzner, Shari; Maxwell, Adam R.; Myers, Joshua R.; Caviggia, Kurt A.; Elster, Jennifer L.; Foley, Michael G.; Jones, Mark E.; Ogden, George L.; Sorensen, Eric L.; Zurk, Lisa M.; Tagestad, Jerry D.; Stephan, Alex J.; Peterson, Mary E.; Bradley, Donald J.

2010-12-10T23:59:59.000Z

194

The LSC Glitch Group : Monitoring Noise Transients during the fifth LIGO Science Run  

E-Print Network (OSTI)

The LIGO Scientific Collaboration (LSC) glitch group is part of the LIGO detector characterization effort. It consists of data analysts and detector experts who, during and after science runs, collaborate for a better understanding of noise transients in the detectors. Goals of the glitch group during the fifth LIGO science run (S5) included (1) offline assessment of the detector data quality, with focus on noise transients, (2) veto recommendations for astrophysical analysis and (3) feedback to the commissioning team on anomalies seen in gravitational wave and auxiliary data channels. Other activities included the study of auto-correlation of triggers from burst searches, stationarity of the detector noise and veto studies. The group identified causes for several noise transients that triggered false alarms in the gravitational wave searches; the times of such transients were identified and vetoed from the data generating the LSC astrophysical results.

L. Blackburn; L. Cadonati; S. Caride; S. Caudill; S. Chatterji; N. Christensen; J. Dalrymple; S. Desai; A. Di Credico; G. Ely; J. Garofoli; L. Goggin; G. González; R. Gouaty; C. Gray; A. Gretarsson; D. Hoak; T. Isogai; E. Katsavounidis; J. Kissel; S. Klimenko; R. A. Mercer; S. Mohapatra; S. Mukherjee; F. Raab; K. Riles; P. Saulson; R. Schofield; P. Shawhan; J. Slutsky; J. R. Smith; R. Stone; C. Vorvick; M. Zanolin; N. Zotov; J. Zweizig

2008-04-04T23:59:59.000Z

195

Comparison of Two Methods of Noise Power Spectrum Determinations of Medical Radiography Systems  

Science Conference Proceedings (OSTI)

Noise in medical images is recognized as an important factor that determines the image quality. Image noise is characterized by noise power spectrum (NPS). We compared two methods of NPS determination namely the methods of Wagner and Dobbins on Lanex Regular TMG screen-film system and Hologic Lorad Selenia full field digital mammography system, with the aim of choosing the better method to use. The methods differ in terms of various parametric choices and algorithm implementations. These parameters include the low pass filtering, low frequency filtering, windowing, smoothing, aperture correction, overlapping of region of interest (ROI), length of fast Fourier transform, ROI size, method of ROI normalization, and slice selection of the NPS. Overall, the two methods agreed to the practical value of noise power spectrum between 10{sup -3}-10{sup -6} mm{sup 2} over spatial frequency range 0-10 mm{sup -1}.

Hassan, Wan Muhamad Saridan Wan; Ahmed Darwish, Zeki [Department of Physics, Faculty of Science, University Teknologi Malaysia, 81310 UTM Skudai, Johor DT (Malaysia)

2011-03-30T23:59:59.000Z

196

Critical infrastructure protection: Resource efficient sampling to improve detection of less frequent patterns in network traffic  

Science Conference Proceedings (OSTI)

Networked critical infrastructures are of national importance. However, such infrastructures are running 24/7. The supervisory control and data acquisition system (SCADA) of the critical infrastructure will generate enormous network traffic continuously. ... Keywords: Critical infrastructure, Sampling, Traffic analysis

Abdun Naser Mahmood; Jiankun Hu; Zahir Tari; Christopher Leckie

2010-07-01T23:59:59.000Z

197

Realistic internet traffic simulation through mixture modeling and a case study  

Science Conference Proceedings (OSTI)

Internet background traffic modeling and simulation is the main challenge when constructing a test environment for network intrusion detection experiments. However, a realistic simulation of network traffic through analytical models is difficult, because ...

Song Luo; Gerald A. Marin

2005-12-01T23:59:59.000Z

198

Perceived crime and traffic safety is related to physical activity among adults in Nigeria  

E-Print Network (OSTI)

Loukaitou-Sideris A, Eckc JE: Crime prevention and activeOyeyemi et al: Perceived crime and traffic safety is relatedARTICLE Open Access Perceived crime and traffic safety is

Oyeyemi, Adewale L; Adegoke, Babatunde O; Sallis, James F; Oyeyemi, Adetoyeje Y; De Bourdeaudhuij, Ilse

2012-01-01T23:59:59.000Z

199

The Effect of Snow on Traffic Counts in Western New York State  

Science Conference Proceedings (OSTI)

While most people know anecdotally that weather affects traffic, relatively little research has examined the correlation between snow and traffic in great detail. Most studies have also been difficult to generalize for other areas and regions ...

David A. Call

2011-04-01T23:59:59.000Z

200

Electron acceleration in solar noise storms  

E-Print Network (OSTI)

We present an up-to-date review of the physics of electron acceleration in solar noi se storms. We describe the observed characteristics of noise storm emission, emphasi zing recent advances in imaging observations. We briefly describe the general method ology of treating particle acceleration problems and apply it to the specific proble m of electron acceleration in noise storms. We dwell on the issue of the efficiency of the overall noise storm emission process and outline open problems in this area.

Subramanian, P

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quality noise traffic" 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

Electron acceleration in solar noise storms  

E-Print Network (OSTI)

We present an up-to-date review of the physics of electron acceleration in solar noi se storms. We describe the observed characteristics of noise storm emission, emphasi zing recent advances in imaging observations. We briefly describe the general method ology of treating particle acceleration problems and apply it to the specific proble m of electron acceleration in noise storms. We dwell on the issue of the efficiency of the overall noise storm emission process and outline open problems in this area.

Prasad Subramanian

2007-01-23T23:59:59.000Z

202

Noise Pollution Control (Minnesota) | Department of Energy  

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

Noise Pollution Control (Minnesota) Noise Pollution Control (Minnesota) Noise Pollution Control (Minnesota) < Back Eligibility Utility Fed. Government Commercial Agricultural Investor-Owned Utility State/Provincial Govt Industrial Construction Municipal/Public Utility Local Government Residential Installer/Contractor Rural Electric Cooperative Tribal Government Low-Income Residential Schools Retail Supplier Institutional Multi-Family Residential Systems Integrator Fuel Distributor Nonprofit General Public/Consumer Transportation Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State Minnesota Program Type Environmental Regulations These regulations set noise standards and direct municipalities to take reasonable measures to prevent the establishment of land use activities

203

Wind Turbine Acoustic Noise A white paper  

E-Print Network (OSTI)

Wind Turbine Acoustic Noise A white paper Prepared by the Renewable Energy Research Laboratory...................................................................... 8 Sound from Wind Turbines .............................................................................................. 10 Sources of Wind Turbine Sound

Massachusetts at Amherst, University of

204

Active Noise Control of a Radial Fan.  

E-Print Network (OSTI)

??This thesis work aims at investigating the use of an active noise control (ANC) system on a radial fan. This was done by studying the… (more)

Murthy, Muddala

2009-01-01T23:59:59.000Z

205

Network Quality of Service for the Enterprise: A Broad Overview  

Science Conference Proceedings (OSTI)

One of the biggest challenges facing the Internet today is to scale to an infrastructure that can provide quality-of-service (QoS) to a wide variety of applications and traffic types. As the Internet continues to grow at a rapid pace and new applications ... Keywords: MPLS, diffServ, intServ, policy based management, quality-of-service, resource reservation, subnet bandwidth manager

Stephanie Wood; Samir Chatterjee

2002-04-01T23:59:59.000Z

206

Youtube traffic characterization: a view from the edge  

Science Conference Proceedings (OSTI)

This paper presents a traffic characterization study of the popular video sharing service, YouTube. Over a three month period we observed almost 25 million transactions between users on an edge network and YouTube, including more than 600,000 video downloads. ... Keywords: characterization, multimedia, web 2.0, youtube

Phillipa Gill; Martin Arlitt; Zongpeng Li; Anirban Mahanti

2007-10-01T23:59:59.000Z

207

Approximating the traffic grooming problem in tree and star networks  

Science Conference Proceedings (OSTI)

We consider the problem of grooming paths in all-optical networks with tree topology so as to minimize the switching cost, measured by the total number of used ADMs. We first present efficient approximation algorithms with approximation factor of 2 ln ... Keywords: add-drop multiplexer (ADM), optical networks, traffic grooming, tree networks, wavelength division multiplexing (WDM)

Michele Flammini; Gianpiero Monaco; Luca Moscardelli; Mordechai Shalom; Shmuel Zaks

2006-06-01T23:59:59.000Z

208

City of Phildelphia: Light emitting diodes for traffic signal displays  

SciTech Connect

This project investigated the feasibility of using light emitting diodes (LEDs) for red traffic signals in a demonstration program at 27 signalized intersections in the City of Philadelphia. LED traffic signals have the potential to achieve significant savings over standard incandescent signals in terms of energy usage and costs, signal relamping costs, signal system maintenance costs, tort liability, and environmental impact. Based on successful experience with the demonstration program, the City of Philadelphia is currently developing funding for the conversion of all existing red incandescent traffic signals at approximately 2,700 intersections to LED signals. This program is expected to cost approximately $4.0 million and save about $850,000 annually in energy costs. During late 1993 and early 1994, 212 red LED traffic signals (134 8-inch signals and 78 12-inch signals) were installed at 27 intersections in Philadelphia. The first group of 93 signals were installed at 13 prototypical intersections throughout the City. The remaining group of signals were installed on a contiguous route in West Philadelphia consisting of standard incandescent signals and LED signals interspersed in a random pattern.

1995-12-01T23:59:59.000Z

209

Traffic and Transportation Committee Meeting Summary of Meeting Notes  

E-Print Network (OSTI)

Traffic and Transportation Committee Meeting Summary of Meeting Notes October 5, 2009 - 1:30 PM Kevin Young Ned Hacker Salt Lake City Transportation WFRC Robert Miles UDOT Rob Kistler U of U person introduced him/herself to the group. II. The group discussed the future meeting schedule (Agenda

Capecchi, Mario R.

210

Detection of illicit traffic based on multiscale analysis  

Science Conference Proceedings (OSTI)

Recent years have witnessed a huge increase in the number and variety of Internet applications, as well as on the number and diversity of security attacks to network users and systems. Consequently, the need for an accurate mapping of traffic to its ... Keywords: application identification, cluster analysis, licit and illict applications, multifractal behavior, multiscale analysis, wavelets

Eduardo Rocha; Paulo Salvador; António Nogueira

2009-09-01T23:59:59.000Z

211

Backoff algorithms performance in burst-like traffic  

Science Conference Proceedings (OSTI)

In the present paper several backoff algorithms are considered to analysis their behavior in burst-like traffic of smart metering network: YITRAN, Binary Exponential and Polynomial backoff algorithms. The comparison was performed by means of transmission ... Keywords: Markov chains, backoff algorithms, smart grid

Ievgenii Tsokalo; Yamnenko Yulia; Stanislav Mudriievskyi

2011-09-01T23:59:59.000Z

212

Traffic and Transportation Committee Summary of Meeting Notes  

E-Print Network (OSTI)

Traffic and Transportation Committee Summary of Meeting Notes March 31, 2006 ­ 1:30pm ­ 1210 Annex Young Salt Lake City - Transportation Tim Harpst Salt Lake City - Transportation Dan Bergenthal Salt Lake City - Transportation Robin Carbaugh Yalecrest Neighborhood Council Hal Johnson UTA-Mgr. BRT

Capecchi, Mario R.

213

Traffic and Transportation Committee Meeting Summary of Meeting Notes  

E-Print Network (OSTI)

to alternative transportation even as they grow. Plans for the future include increasing the number of bikeTraffic and Transportation Committee Meeting Summary of Meeting Notes September 15, 2006- 1:30 PM 6 Jenkin Howard Hughes Medical Institute @ U of U Joe Perrin Salt Lake City, Transportation Advisory Board

Capecchi, Mario R.

214

Traffic Measurement and Statistical Analysis in a Disaster Area Scenario  

E-Print Network (OSTI)

-of-Hospital] disaster response."([5]) Public safety units need reliable communication independent of any inTraffic Measurement and Statistical Analysis in a Disaster Area Scenario Nils Aschenbruck, Matthias, 53117 Bonn, Germany {aschenbruck, matthew, martini, toelle}@cs.uni-bonn.de Abstract-- Disaster areas

Frank, Matthias

215

Statistical Analysis of Traffic Measurements in a Disaster Area Scenario  

E-Print Network (OSTI)

challenges of information sharing in OOH [Out-of-Hospital] disaster response."([1]) Performance evaluationStatistical Analysis of Traffic Measurements in a Disaster Area Scenario Considering Heavy Load-- Catastrophes cause an area of destruction including destroyed infrastructure. These disaster area scenarios

Frank, Matthias

216

Traffic measurement and analysis of building automation and control networks  

Science Conference Proceedings (OSTI)

This paper proposes a framework for a flow-based network traffic monitoring of building automation and control networks. Current approaches to monitor special environment networks are limited to checking accessibility and a state of monitored devices. ... Keywords: BACnet, BACnetflow, analysis, automation, building, control, measurement, network

Radek Krej?í; Pavel ?eleda; Jakub Dobrovolný

2012-06-01T23:59:59.000Z

217

Distributed wide-area traffic management for cloud services  

Science Conference Proceedings (OSTI)

The performance of interactive cloud services depends heavily on which data centers handle client requests, and which wide-area paths carry traffic. While making these decisions, cloud service providers also need to weigh operational considerations like ... Keywords: joint optimization, multi-homed routing, request mapping

Srinivas Narayana; Joe Wenjie Jiang; Jennifer Rexford; Mung Chiang

2012-06-01T23:59:59.000Z

218

SEMSim: A Distributed Architecture for Multi-scale Traffic Simulation  

Science Conference Proceedings (OSTI)

With the fast urbanization of our modern society, transportation systems in cities are facing increasing problems such as congestion, collisions, and high levels of emissions. Researchers have been searching for solutions by investigating better urban ... Keywords: Nanoscopic Traffic Simulation, Parallel and Distributed Simulation

Yadong Xu; Heiko Aydt; Michael Lees

2012-07-01T23:59:59.000Z

219

Intelligent Control in Automation Based on Wireless Traffic Analysis  

SciTech Connect

Wireless technology is a central component of many factory automation infrastructures in both the commercial and government sectors, providing connectivity among various components in industrial realms (distributed sensors, machines, mobile process controllers). However wireless technologies provide more threats to computer security than wired environments. The advantageous features of Bluetooth technology resulted in Bluetooth units shipments climbing to five million per week at the end of 2005 [1, 2]. This is why the real-time interpretation and understanding of Bluetooth traffic behavior is critical in both maintaining the integrity of computer systems and increasing the efficient use of this technology in control type applications. Although neuro-fuzzy approaches have been applied to wireless 802.11 behavior analysis in the past, a significantly different Bluetooth protocol framework has not been extensively explored using this technology. This paper presents a new neurofuzzy traffic analysis algorithm of this still new territory of Bluetooth traffic. Further enhancements of this algorithm are presented along with the comparison against the traditional, numerical approach. Through test examples, interesting Bluetooth traffic behavior characteristics were captured, and the comparative elegance of this computationally inexpensive approach was demonstrated. This analysis can be used to provide directions for future development and use of this prevailing technology in various control type applications, as well as making the use of it more secure.

Kurt Derr; Milos Manic

2007-08-01T23:59:59.000Z

220

Intelligent Control in Automation Based on Wireless Traffic Analysis  

SciTech Connect

Wireless technology is a central component of many factory automation infrastructures in both the commercial and government sectors, providing connectivity among various components in industrial realms (distributed sensors, machines, mobile process controllers). However wireless technologies provide more threats to computer security than wired environments. The advantageous features of Bluetooth technology resulted in Bluetooth units shipments climbing to five million per week at the end of 2005 [1, 2]. This is why the real-time interpretation and understanding of Bluetooth traffic behavior is critical in both maintaining the integrity of computer systems and increasing the efficient use of this technology in control type applications. Although neuro-fuzzy approaches have been applied to wireless 802.11 behavior analysis in the past, a significantly different Bluetooth protocol framework has not been extensively explored using this technology. This paper presents a new neurofuzzy traffic analysis algorithm of this still new territory of Bluetooth traffic. Further enhancements of this algorithm are presented along with the comparison against the traditional, numerical approach. Through test examples, interesting Bluetooth traffic behavior characteristics were captured, and the comparative elegance of this computationally inexpensive approach was demonstrated. This analysis can be used to provide directions for future development and use of this prevailing technology in various control type applications, as well as making the use of it more secure.

Kurt Derr; Milos Manic

2007-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "quality noise traffic" 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

The impact of a realistic packet traffic model on the performance of surveillance wireless sensor networks  

Science Conference Proceedings (OSTI)

It is quite common to see that classical periodic or Poisson packet traffic models are used for evaluating the performance of wireless sensor networks (WSNs). However, these models may not be appropriate for modeling the data traffic resulting from a ... Keywords: Intrusion detection applications, Packet traffic model, Surveillance sensor networks, Wireless sensor networks

Ilker Demirkol; Cem Ersoy; Fatih Alagöz; Hakan Deliç

2009-02-01T23:59:59.000Z

222

VTrack: accurate, energy-aware road traffic delay estimation using mobile phones  

Science Conference Proceedings (OSTI)

Traffic delays and congestion are a major source of inefficiency, wasted fuel, and commuter frustration. Measuring and localizing these delays, and routing users around them, is an important step towards reducing the time people spend stuck in traffic. ... Keywords: GPS, car, congestion, energy, localization, location, mobile, phone, sensor, traffic, transportation

Arvind Thiagarajan; Lenin Ravindranath; Katrina LaCurts; Samuel Madden; Hari Balakrishnan; Sivan Toledo; Jakob Eriksson

2009-11-01T23:59:59.000Z

223

A SET OF NEW TRAFFIC-RESPONSIVE RAMP-METERING ALGORITHMS AND  

E-Print Network (OSTI)

A SET OF NEW TRAFFIC-RESPONSIVE RAMP-METERING ALGORITHMS AND MICROSCOPIC SIMULATION RESULTS switching traffic-responsive ramp-metering controller that adapts to the different traffic dynamics under between the model sampling time and the metering-rate update interval. In addition, a queue length

Horowitz, Roberto

224

Traffic-driven power saving in operational 3G cellular networks  

Science Conference Proceedings (OSTI)

Base stations (BSes) in the 3G cellular network are not energy proportional with respect to their carried traffic load. Our mea- surements show that 3G traffic exhibits high fluctuations both in time and over space, thus incurring energy waste. In this ... Keywords: 3g network traffic, cellular networks, energy efficiency

Chunyi Peng; Suk-Bok Lee; Songwu Lu; Haiyun Luo; Hewu Li

2011-09-01T23:59:59.000Z

225

A Comparison of Methods for Estimating the Tail Index of Heavy-tailed Internet Traffic  

E-Print Network (OSTI)

1 A Comparison of Methods for Estimating the Tail Index of Heavy-tailed Internet Traffic Karim the effects of heavy-tailedness in network traffic patterns and shown that Internet traffic flows exhibit characteristics of self-similarity that can be explained by the heavy-tailedness of the various distributions

Davies, John N.

226

Max-Weight Scheduling in Queueing Networks with Heavy-Tailed Traffic  

E-Print Network (OSTI)

1 Max-Weight Scheduling in Queueing Networks with Heavy-Tailed Traffic Mihalis G. Markakis, Eytan network with a mix of heavy-tailed and light- tailed traffic, and analyze the impact of heavy unstable otherwise. First, we show that a heavy-tailed traffic flow is delay unstable under any scheduling

Tsitsiklis, John

227

Effect of Traffic on Sales and Conversion Rates of Retail Stores  

Science Conference Proceedings (OSTI)

Attracting shoppers to stores and converting the incoming traffic into sales profitably are vital for the financial health of retailers. In this paper, we use proprietary data pertaining to an apparel retailer to study the relationship between store ... Keywords: retail operations, store labor management, store performance, traffic uncertainty, traffic variability

Olga Perdikaki; Saravanan Kesavan; Jayashankar M. Swaminathan

2012-01-01T23:59:59.000Z

228

Selection of information types based on personal utility: a testbed for traffic information markets  

Science Conference Proceedings (OSTI)

Traffic is an interesting research area for multi-agent systems, as the inter-dependence of actions leads to a high frequency of implicit coordination decisions among agents. The present work investigates the simulation of a market for traffic information. ... Keywords: adaption and learning, traffic simulation

Franziska Klügl; Ana L. C. Bazzan; Joachim Wahle

2003-07-01T23:59:59.000Z

229

Holographic Indeterminacy, Uncertainty and Noise  

E-Print Network (OSTI)

A theory is developed to describe the nonlocal effect of spacetime quantization on position measurements transverse to macroscopic separations. Spacetime quantum states close to a classical null trajectory are approximated by plane wavefunctions of Planck wavelength (l_P) reference beams; these are used to connect transverse position operators at macroscopically separated events. Transverse positions of events with null spacetime separation, but separated by macroscopic spatial distance $L$, are shown to be quantum conjugate observables, leading to holographic indeterminacy and a new uncertainty principle, a lower bound on the standard deviation of relative transverse position \\Delta x_\\perp > \\sqrt{l_PL} or angular orientation \\Delta\\theta > \\sqrt{l_P/L}. The resulting limit on the number of independent degrees of freedom is shown to agree quantitatively with holographic covariant entropy bounds derived from black hole physics and string theory. The theory predicts a universal ``holographic noise'' of spacet...

Hogan, Craig J

2007-01-01T23:59:59.000Z

230

Characterizing the IEEE 802.11 Traffic: The Wireless Side  

E-Print Network (OSTI)

Many studies on measurement and characterization of wireless LANs have been performed recently. Most of these measurements have been conducted from the wired portion of the network based on wired monitoring or SNMP statistics. In this paper we argue that traffic measurements from a wireless vantage point in the network are more appropriate than wired measurements or SNMP statistics, to expose the wireless medium characteristics and their impact on the traffic patterns. While it is easier to make consistent measurements in the wired part of a network, such measurements can not observe the significant vagaries present in the wireless medium itself. As a consequence constructing an accurate measurement system from a wireless vantage point is important but usually quite difficult due to the noisy wireless channel. In our work we have explored the various issues in implementing such a system to monitor traffic in an IEEE 802.11 based wireless network. We show the effectiveness of the wireless monitoring by quantitatively comparing it with SNMP and measurements at wired vantage points. We also show the analysis of a typical computer science department network traffic using the wireless monitoring technique. Our analysis reveals rich information about the PHY/MAC layers of the IEEE 802.11 protocol such as the typical traffic mix of different frame types, their temporal characteristics, correlation with the user activities and the error characteristics of the wireless medium. Moreover, we identify anomalies in the operation of the IEEE 802.11 MAC protocol. Our results show excessive retransmissions of some management frame types reducing the useful throughput of the wireless network. We also find that some features of the protocol, which were designed to reduce the retransmissi...

Jihwang Yeo; Moustafa Youssef; Ashok Agrawala

2004-01-01T23:59:59.000Z

231

An approach for improving performance of aggregate voice-over-IP traffic  

E-Print Network (OSTI)

The emerging popularity and interest in Voice-over-IP (VoIP) has been accompanied by customer concerns about voice quality over these networks. The lack of an appropriate real-time capable infrastructure in packet networks along with the threats of denial-of service (DoS) attacks can deteriorate the service that these voice calls receive. And these conditions contribute to the decline in call quality in VoIP applications; therefore, error-correcting/concealing techniques remain the only alternative to provide a reasonable protection for VoIP calls against packet losses. Traditionally, each voice call employs its own end-to-end forward-error-correction (FEC) mechanisms. In this paper, we show that when VoIP calls are aggregated over a provider's link, with a suitable linear-time encoding for the aggregated voice traffic, considerable quality improvement can be achieved with little redundancy. We show that it is possible to achieve rates closer to channel capacity as more calls are combined with very small output loss rates even in the presence of significant packet loss rates in the network. The advantages of the proposed scheme far exceed similar or other coding techniques applied to individual voice calls.

Al-Najjar, Camelia

2005-08-01T23:59:59.000Z

232

Multi-class blue noise sampling  

Science Conference Proceedings (OSTI)

Sampling is a core process for a variety of graphics applications. Among existing sampling methods, blue noise sampling remains popular thanks to its spatial uniformity and absence of aliasing artifacts. However, research so far has been mainly focused ... Keywords: blue noise, dart throwing, multi-class, poisson hard/soft disk, relaxation, sampling

Li-Yi Wei

2010-07-01T23:59:59.000Z

233

Possibilistic signal processing: How to handle noise?  

Science Conference Proceedings (OSTI)

We propose a novel approach for noise quantifier at each location of a signal. This method is based on replacing the conventional kernel-based approach extensively used in signal processing by an approach involving another kind of kernel: a possibility ... Keywords: Choquet integral, Kernel methods, Noise quantization, Possibility distribution, Signal processing

Kevin Loquin; Olivier Strauss; Jean-Francois Crouzet

2010-11-01T23:59:59.000Z

234

Uniform-distribution attribute noise learnability  

Science Conference Proceedings (OSTI)

We study the problem of PAC-learning Boolean functions with random attribute noise under the uniform distribution. We define a noisy distance measure for function classes and show that if this measure is small for a class C and an attribute ... Keywords: Fourier analysis, computational learning theory, learning with noise

Nader H. Bshouty; Jeffrey C. Jackson; Christino Tamon

2003-12-01T23:59:59.000Z

235

Effects of the chemomechanical stepping cycle on the traffic of molecular motors  

E-Print Network (OSTI)

We discuss effects of the stepping kinetics of molecular motors on their traffic behavior on crowded filaments using a simple two-state chemomechanical cycle. While the general traffic behavior is quite robust with respect to the detailed kinetics of the step, a few observable parameters exhibit a strong dependence on these parameters. Most strikingly, the effective unbinding rate of the motors may both increase and decrease with increasing traffic density, depending on the details of the motor step. Likewise the run length either exhibits a strong decrease or almost no dependence on the traffic density. We compare our theoretical results with recent experimental observations on motor traffic.

Stefan Klumpp; Yan Chai; Reinhard Lipowsky

2008-10-09T23:59:59.000Z

236

Chaos and noise in galactic potentials  

E-Print Network (OSTI)

ABBREVIATED ABSTRACT: This paper summarises an investigation of the effects of weak friction and noise in time-independent, nonintegrable potentials which admit both regular and stochastic orbits. The aim is to understand the qualitative effects of internal and external irregularities associated, e.g., with discreteness effects or couplings to an external environment, which stars in any real galaxy must experience. The two principal conclusions are: (1) These irregularities can be important on time scales much shorter than the natural relaxation time scale t_R associated with the friction and noise. For stochastic orbits friction and noise induce an average exponential divergence from the unperturbed Hamiltonian trajectory at a rate set by the value of the local Lyapunov exponent. Even weak noise can make a pointwise interpretation of orbits suspect already on time scales much shorter than t_R. (2) The friction and noise can also have significant effects on the statistical properties of ensembles of stochasti...

Habib, S; Mahon, M E; Habib, Salman; Kandrup, Henry E; Mahon, M Elaine

1994-01-01T23:59:59.000Z

237

Noise-enhanced trapping in chaotic scattering  

E-Print Network (OSTI)

We show that noise enhances the trapping of trajectories in scattering systems. In fully chaotic systems, the decay rate can decrease with increasing noise due to a generic mismatch between the noiseless escape rate and the value predicted by the Liouville measure of the exit set. In Hamiltonian systems with mixed phase space we show that noise leads to a slower algebraic decay due to trajectories performing a random walk inside Kolmogorov-Arnold-Moser islands. We argue that these noise-enhanced trapping mechanisms exist in most scattering systems and are likely to be dominant for small noise intensities, which is confirmed through a detailed investigation in the Henon map. Our results can be tested in fluid experiments, affect the fractal Weyl's law of quantum systems, and modify the estimations of chemical reaction rates based on phase-space transition state theory.

Altmann, Eduardo G; 10.1103/PhysRevLett.105.244102

2010-01-01T23:59:59.000Z

238

Alternative Fuels Data Center: Natural Gas Safety after a Traffic Accident  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Natural Gas Safety Natural Gas Safety after a Traffic Accident to someone by E-mail Share Alternative Fuels Data Center: Natural Gas Safety after a Traffic Accident on Facebook Tweet about Alternative Fuels Data Center: Natural Gas Safety after a Traffic Accident on Twitter Bookmark Alternative Fuels Data Center: Natural Gas Safety after a Traffic Accident on Google Bookmark Alternative Fuels Data Center: Natural Gas Safety after a Traffic Accident on Delicious Rank Alternative Fuels Data Center: Natural Gas Safety after a Traffic Accident on Digg Find More places to share Alternative Fuels Data Center: Natural Gas Safety after a Traffic Accident on AddThis.com... More in this section... Natural Gas Basics Benefits & Considerations Stations Vehicles Availability Conversions Emissions

239

Quantum noise and stochastic reduction  

E-Print Network (OSTI)

In standard nonrelativistic quantum mechanics the expectation of the energy is a conserved quantity. It is possible to extend the dynamical law associated with the evolution of a quantum state consistently to include a nonlinear stochastic component, while respecting the conservation law. According to the dynamics thus obtained, referred to as the energy-based stochastic Schrodinger equation, an arbitrary initial state collapses spontaneously to one of the energy eigenstates, thus describing the phenomenon of quantum state reduction. In this article, two such models are investigated: one that achieves state reduction in infinite time, and the other in finite time. The properties of the associated energy expectation process and the energy variance process are worked out in detail. By use of a novel application of a nonlinear filtering method, closed-form solutions--algebraic in character and involving no integration--are obtained for both these models. In each case, the solution is expressed in terms of a random variable representing the terminal energy of the system, and an independent noise process. With these solutions at hand it is possible to simulate explicitly the dynamics of the quantum states of complicated physical systems.

Dorje C. Brody; Lane P. Hughston

2005-08-29T23:59:59.000Z

240

Spacetime Indeterminacy and Holographic Noise  

E-Print Network (OSTI)

Arguments are presented for a new kind of quantum indeterminacy of transverse position, arising from holographic quantum degrees of freedom of spacetime. Indeterminacy of the angular orientation of particle trajectories due to wave/particle duality at the Planck scale leads to detectable indeterminacy of emergent spacetime over macroscopic distances. Quantum mechanically it can be expressed as a small nonvanishing commutator [ x_1, x_2]=-il_P L_{12} between position operators x_1 and x_2 transverse to a null trajectory at two events with rest frame separation L_{12}, leading to a formal uncertainty relation \\Delta x_1\\Delta x_2> l_P L_{12}/2, where l_P denotes the Planck length. The indeterminacy is interpreted as due to branching of the spacetime metric with spatial and temporal coherence scale ~ L_{12}. This hypothesis is sufficient to account for covariant bounds on entropy and for unitarity in black hole evaporation processes. The indeterminacy results in a universal holographic quantum spacetime noise, w...

Hogan, Craig J

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quality noise traffic" 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

Holographic Indeterminacy, Uncertainty and Noise  

E-Print Network (OSTI)

A theory is developed to describe the nonlocal effect of spacetime quantization on position measurements transverse to macroscopic separations. Spacetime quantum states close to a classical null trajectory are approximated by plane wavefunctions of Planck wavelength (l_P) reference beams; these are used to connect transverse position operators at macroscopically separated events. Transverse positions of events with null spacetime separation, but separated by macroscopic spatial distance $L$, are shown to be quantum conjugate observables, leading to holographic indeterminacy and a new uncertainty principle, a lower bound on the standard deviation of relative transverse position \\Delta x_\\perp > \\sqrt{l_PL} or angular orientation \\Delta\\theta > \\sqrt{l_P/L}. The resulting limit on the number of independent degrees of freedom is shown to agree quantitatively with holographic covariant entropy bounds derived from black hole physics and string theory. The theory predicts a universal ``holographic noise'' of spacetime, appearing as shear perturbations with a frequency-independent power spectral density S_H=l_P/c, or in equivalent metric perturbation units, h_{H,rms} \\sqrt{l_P/c} = 2.3 \\times 10^{-22} /\\sqrt{Hz}. If this description of holographic phenomenology is valid, interferometers with current technology could undertake direct quantitative studies of quantum gravity.

Craig J. Hogan

2007-09-05T23:59:59.000Z

242

Spacetime Indeterminacy and Holographic Noise  

E-Print Network (OSTI)

A new kind of quantum indeterminacy of transverse position is shown to arise from quantum degrees of freedom of spacetime, based on the assumption that classical trajectories can be defined no better than the diffraction limit of Planck scale waves. Indeterminacy of the angular orientation of particle trajectories due to wave/particle duality at the Planck scale leads to indeterminacy of a nearly-flat spacetime metric, described as a small nonvanishing quantum commutation relation between transverse position operators at different events along a null trajectory. An independent derivation of the same effect is presented based on the requirement of unitarity in black hole evaporation. The indeterminacy is interpreted as a universal holographic quantum spacetime noise, with a frequency-independent spectrum of metric perturbation amplitude, h_H^2^{1/2} \\simeq \\sqrt{l_P}=2.3 \\times 10^{-22} /\\sqrt{Hz}, where l_P denotes the Planck length. The effect is estimated to be directly measurable using current interferometer technology similar to LIGO and LISA.

Craig J. Hogan

2007-06-13T23:59:59.000Z

243

Low phase noise, high bandwidth frequency synthesis techniques  

E-Print Network (OSTI)

A quantization noise reduction technique is proposed that allows fractional-N frequency synthesizers to achieve high closed loop bandwidth and low output phase noise simultaneously. Quantization induced phase noise is the ...

Meninger, Scott (Scott Edward), 1974-

2005-01-01T23:59:59.000Z

244

Blue whale response to underwater noise from commercial ships  

E-Print Network (OSTI)

D. , 1976. Mechanics of Underwater Noise. Pergamon PressD. , 1993. On ocean underwater ambient noise. AcousticsRichmond, M.E. , 2005. Underwater, low- frequency noise in a

McKenna, Megan Frances

2011-01-01T23:59:59.000Z

245

Noise-based communication and computing  

E-Print Network (OSTI)

We discuss the speed-error-heat triangle and related problems with rapidly increasing energy dissipation and error rate during miniaturization. These and the independently growing need of unconditional data security have provoked non-conventional approaches in the physics of informatics. Noise-based informatics is a potentially promising possibility which is the way how biological brains process the information. Recently, it has been shown that thermal noise and its electronically enhanced versions (Johnson-like noises) can be utilized as information carrier with peculiar properties. Relevant examples are Zero power (stealth) communication, Unconditionally secure communication with Johnson(-like) noise and Kirchhoff loop and Noise-driven computing. The zero power communication utilizes the equilibrium background noise in the channel to transfer information. The unconditionally secure communication is based on the properties of Johnson(-like) noise and those of a simple Kirchhoff's loop. The scheme utilizes on the robustness of classical information and the second law of thermodynamics. It uncovers active eavesdropping within a single clock period (no error statistics is required) and it is naturally protected against the man-in-the-middle attack. Further advantages of the scheme is that the circuitry can easily be integrated on computer chips, unconditionally secure computer processors, memories and other hardware can be realized.

Laszlo B. Kish

2008-08-19T23:59:59.000Z

246

Atypical Behavior Identification in Large Scale Network Traffic  

SciTech Connect

Cyber analysts are faced with the daunting challenge of identifying exploits and threats within potentially billions of daily records of network traffic. Enterprise-wide cyber traffic involves hundreds of millions of distinct IP addresses and results in data sets ranging from terabytes to petabytes of raw data. Creating behavioral models and identifying trends based on those models requires data intensive architectures and techniques that can scale as data volume increases. Analysts need scalable visualization methods that foster interactive exploration of data and enable identification of behavioral anomalies. Developers must carefully consider application design, storage, processing, and display to provide usability and interactivity with large-scale data. We present an application that highlights atypical behavior in enterprise network flow records. This is accomplished by utilizing data intensive architectures to store the data, aggregation techniques to optimize data access, statistical techniques to characterize behavior, and a visual analytic environment to render the behavioral trends, highlight atypical activity, and allow for exploration.

Best, Daniel M.; Hafen, Ryan P.; Olsen, Bryan K.; Pike, William A.

2011-10-23T23:59:59.000Z

247

Automatic Parallel Parking and Returning to Traffic Maneuvers  

E-Print Network (OSTI)

This video illustrates a control approach developed to perform parallel parking and returning to traffic maneuvers for a car capable of autonomous motion. The key idea is to carry out a motion control procedure involving a "Localization-Planning-Execution" cycle until a specified location of the car relative to its environment is reached. Range measurements are used to model environmental objects around the car. The automatic maneuvers developed are demonstrated on an experimental electric autonomous car in a usual traffic environment. 1 Introduction Many drivers have difficulties or make errors while parallel parking or in pulling out of a parking place. A control approach to automatic parallel parking and pulling out maneuvers has been developed and tested on an experimental electric car capable of autonomous motion. The manual car driving is supplemented with an automatic steering and velocity control [1]. The car is equiped with: (1) - a sensor unit to measure relative distances ...

Igor Paromtchik; Christian Laugier

1998-01-01T23:59:59.000Z

248

Microsoft Word - 4L_Traffic_DEIR.doc  

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

L-1 ESA / 201074 L-1 ESA / 201074 Public Circulation Draft January 22, 2007 IV.L. Transportation/Traffic IV.L.1 Introduction This chapter evaluates project impacts on transportation facilities and existing transportation operating conditions in the vicinity of the project area, including neighborhood traffic, vehicular circulation, parking, transit and shuttle services, and pedestrian and bicycle circulation. IV.L.2 Setting LBNL is located close to three major highways: Interstate 80/580 1 approximately three miles to the west, and State Routes (SR) 24 and 13, two miles to the south. Access from the Lab to I-80/580 is through the city of Berkeley via arterial roads. Access to SR 24 and SR 13 is via Tunnel Road. Grizzly Peak Boulevard, which runs through a largely undeveloped area, provides a

249

Noise-control needs in the developing energy technologies  

DOE Green Energy (OSTI)

The noise characteristics of existing energy conversion technologies, e.g., from obtaining and processing fossil fuels to power plants operations, and of developing energy technologies (wind, geothermal sources, solar energy or fusion systems) are discussed in terms of the effects of noise on humans, animals, structures, and equipment and methods for noise control. Regulations for noise control are described. Recommendations are made for further research on noise control and noise effects. (LCL)

Keast, D.N.

1978-03-01T23:59:59.000Z

250

Approximating the traffic grooming problem in tree and star networks  

Science Conference Proceedings (OSTI)

We consider the problem of grooming paths in all-optical networks with tree topology so as to minimize the switching cost, measured by the total number of used ADMs. We first present efficient approximation algorithms with approximation factor of 2ln(@d@?g)+o(ln(@d@?g)) ... Keywords: Add-drop multiplexer (ADM), Optical networks, Traffic grooming, Tree networks, Wavelength division multiplexing (WDM)

Michele Flammini; Gianpiero Monaco; Luca Moscardelli; Mordechai Shalom; Shmuel Zaks

2008-07-01T23:59:59.000Z

251

EECEECEECEEC 687/787 Mobile Computing687/787 Mobile Computing687/787 Mobile Computing687/787 Mobile Computing Mobility and TrafficMobility and TrafficMobility and TrafficMobility and Traffic  

E-Print Network (OSTI)

-v 1 -n 20 -p 2.0 -M 10.0 -t 200 -x 500 -y 500 > scen-v1.tcl setdest -v 2 -n 20 -s 1 -m 1 -M 10.0 -t 200 -P 1 -p 2.0 -x 500 -y 500 > scen-v2.tcl 10 cbrgen.tcl A CBR Traffic Generator What is CBR generator ~ns/indep-utils/cmu-scen-gen/cbrgen.tcl Command format ns cbrgen.tcl [-type ##] [-nn ##] [-seed

Yu, Chansu

252

Routing multi-class traffic flows in the plane  

Science Conference Proceedings (OSTI)

We study a class of multi-commodity flow problems in geometric domains: For a given planar domain P populated with obstacles (holes) of K>=2types, compute a set of thick paths from a ''source'' edge of P to a ''sink'' edge of P for vehicles of K distinct ... Keywords: Air traffic management, Approximation algorithms, Geometric maximum flow, Multi-commodity flow, Optimal paths

Joondong Kim; Joseph S. B. Mitchell; Valentin Polishchuk; Shang Yang; Jingyu Zou

2012-04-01T23:59:59.000Z

253

Fundamental diagrams for kinetic equations of traffic flow  

E-Print Network (OSTI)

In this paper we investigate the ability of some recently introduced discrete kinetic models of vehicular traffic to catch, in their large time behavior, typical features of theoretical fundamental diagrams. Specifically, we address the so-called "spatially homogeneous problem" and, in the representative case of an exploratory model, we study the qualitative properties of its solutions for a generic number of discrete microstates. This includes, in particular, asymptotic trends and equilibria, whence fundamental diagrams originate.

Luisa Fermo; Andrea Tosin

2013-05-20T23:59:59.000Z

254

Realistic Multi-Lane Traffic Rules for Cellular Automata  

E-Print Network (OSTI)

A set of lane changing rules for cellular automata simulating multi-lane traffic is proposed. It reproduces qualitatively that the passing lane becomes more crowded than the one for slower cars if the flux is high enough, which is true for motorways in countries like Germany where passing should be done on a specified lane as a rule. The rules have two parameters allowing to adjust the inversion point of the lane usage distribution and to calibrate the model.

Peter Wagner; Kai Nagel; Dietrich E. Wolf

1996-01-01T23:59:59.000Z

255

On many-server queues in heavy traffic  

E-Print Network (OSTI)

We establish a heavy-traffic limit theorem on convergence in distribution for the number of customers in a many-server queue when the number of servers tends to infinity. No critical loading condition is assumed. Generally, the limit process does not have trajectories in the Skorohod space. We give conditions for the convergence to hold in the topology of compact convergence. Some new results for an infinite server are also provided.

Puhalskii, Anatolii A; 10.1214/09-AAP604

2010-01-01T23:59:59.000Z

256

A Frequency-Domain Silence Noise Model  

E-Print Network (OSTI)

Abstract. This paper proposes a simple, computationally efficient 2-mixture model approach to discrimination between speech and background noise. It is directly derived from observations on real data, and can be used in a fully unsupervised manner, with the EM algorithm. A first application to sector-based, joint audio source localization and detection, using multiple microphones, confirms that the model can provide major enhancement. A second application to the single channel speech recognition task in a noisy environment yields major improvement on stationary noise and promising results on non-stationary noise. 2 IDIAP–RR 05-13 1

Guillaume Lathoud A B; Guillaume Lathoud; Mathew Magimai. -doss; Bertrand Mesot

2005-01-01T23:59:59.000Z

257

Noise from cooling towers of power parks  

SciTech Connect

A study is presented of the noise pollution problem for large power parks proposed for the future. Such parks might have an area of about 75 sq. miles, and a generating capacity up to 48000 MW. A comparative analysis has been done for natural and mechanical-draft wet towers as the major sources of acoustic power. Noise radiation from single isolated towers as well as from a dispersed array of towers has been considered for both types of cooling systems. Major noise attenuation effects considered are due to the atmospheric absorption and A- weighting. Conditions of 60F and 70 percent relative humidity in a still atmosphere have been assumed. (auth)

Zakaria, J.; Moore, F.K.

1975-10-14T23:59:59.000Z

258

Wind Turbine Generator System Acoustic Noise Test Report for the ARE 442 Wind Turbine  

Science Conference Proceedings (OSTI)

This test was conducted on the ARE 442 as part of the U.S. Department of Energy's (DOE's) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, five turbines are being tested at the National Wind Technology Center (NWTC) as a part of this project. Acoustic noise testing is one of up to five tests that may be performed on the turbines, including duration, safety and function, power performance, and power quality tests. The acoustic noise test was conducted to the IEC 61400-11 Edition 2.1.

Huskey, A.; van Dam, J.

2010-11-01T23:59:59.000Z

259

A Learning System for Discriminating Variants of Malicious Network Traffic  

Science Conference Proceedings (OSTI)

Modern computer network defense systems rely primarily on signature-based intrusion detection tools, which generate alerts when patterns that are pre-determined to be malicious are encountered in network data streams. Signatures are created reactively, and only after in-depth manual analysis of a network intrusion. There is little ability for signature-based detectors to identify intrusions that are new or even variants of an existing attack, and little ability to adapt the detectors to the patterns unique to a network environment. Due to these limitations, the need exists for network intrusion detection techniques that can more comprehensively address both known unknown networkbased attacks and can be optimized for the target environment. This work describes a system that leverages machine learning to provide a network intrusion detection capability that analyzes behaviors in channels of communication between individual computers. Using examples of malicious and non-malicious traffic in the target environment, the system can be trained to discriminate between traffic types. The machine learning provides insight that would be difficult for a human to explicitly code as a signature because it evaluates many interdependent metrics simultaneously. With this approach, zero day detection is possible by focusing on similarity to known traffic types rather than mining for specific bit patterns or conditions. This also reduces the burden on organizations to account for all possible attack variant combinations through signatures. The approach is presented along with results from a third-party evaluation of its performance.

Beaver, Justin M [ORNL; Symons, Christopher T [ORNL; Gillen, Rob [ORNL

2013-01-01T23:59:59.000Z

260

W-band Frequency Synthesis and AM/PM Noise ...  

Science Conference Proceedings (OSTI)

... W-band Frequency Synthesis and AM/PM Noise Measurement System. ... Dual-channel W-band AM/PM noise measurement system. ...

2010-10-05T23:59:59.000Z

Note: This page contains sample records for the topic "quality noise traffic" 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

Optimization of Active Noise Control for Small Axial Cooling Fans.  

E-Print Network (OSTI)

??Previous work has shown that active noise control is a feasible solution to attenuate tonal noise radiated by small axial cooling fans, such as those… (more)

Monson, Brian B 1979-

2006-01-01T23:59:59.000Z

262

Weather Noise Forcing of Surface Climate Variability  

Science Conference Proceedings (OSTI)

A model-based method to evaluate the role of weather noise forcing of low-frequency variability of surface properties, including SST, surface currents, land surface temperature, and soil moisture, is presented. In this procedure, an “interactive ...

Edwin K. Schneider; Meizhu Fan

2007-09-01T23:59:59.000Z

263

Tropical Convective Variability as 1/f Noise  

Science Conference Proceedings (OSTI)

Evidence is presented that the tropical convective variability behaves as 1/f noise for a 1–30-day period. This behavior is shown by analyzing the time series of convective available potential energy, which measures the degree of convective ...

Jun-Ichi Yano; Klaus Fraedrich; Richard Blender

2001-09-01T23:59:59.000Z

264

Separating signal and noise in climate warming  

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

11162011 | NR-11-11-03 Separating signal and noise in climate warming Anne M Stark, LLNL, (925) 422-9799, stark8@llnl.gov Printer-friendly A National Oceanic and Atmospheric...

265

Quantum capacity of channel with thermal noise  

E-Print Network (OSTI)

The quantum capacity of thermal noise channel is studied. The extremal input state is obtained at the postulation that the coherent information is convex or concave at its vicinity. When the input energy tends to infinitive, it is verified by perturbation theory that the coherent information reaches its maximum at the product of identical thermal state input. The quantum capacity is obtained for lower noise channel and it is equal the one shot capacity.

Xiao-yu Chen

2006-02-11T23:59:59.000Z

266

Quality Policy  

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

Policy110406 Page 1 of 3 EOTA - System Level Document Title: Quality Policy Document Number: Q-002 Rev. 110406 Document Owner: Elizabeth Sousa Backup Owner: Melissa Otero...

267

Noise in current-commutating passive FET mixers  

Science Conference Proceedings (OSTI)

Noise in the mixer of zero-IF receivers can compromise the overall receiver sensitivity. The evolution of a passive CMOS mixer based on the knowledge of the physical mechanisms of noise in an active mixer is explained. Qualitative physical models that ... Keywords: flicker noise, passive mixer, physical mechanism, white noise, zero-IF

Saeed Chehrazi; Ahmad Mirzaei; Asad A. Abidi

2010-02-01T23:59:59.000Z

268

Rain noise level measurements in a performing arts center  

Science Conference Proceedings (OSTI)

Noise level measurements made in a performance hall and in related spaces with subjectively described light

Robert C. Coffeen

2007-01-01T23:59:59.000Z

269

SIMULATION BASED EVALUATION OF MERGE METERING CONCEPT FOR TRAFFIC CONTROL AT WORK ZONES.  

E-Print Network (OSTI)

??The merge metering strategy controls the traffic entering a work zone section of a freeway through the use of metering signals at the merging area… (more)

PAVITHRAN, MANOJKUMAR

2006-01-01T23:59:59.000Z

270

Is LED use in traffic signals viable in the Texas Department of Transportation, Houston District?.  

E-Print Network (OSTI)

??Light Emitting Diode (LED) is used in traffic signals and highway illumination in the Texas Department of Transportation, Houston District (TxDOT). The thesis focuses on… (more)

Ughanze, Ugonna Uzodinma

2012-01-01T23:59:59.000Z

271

DPSS Laser Beam Quality Optimization Through Pump Current Tuning  

SciTech Connect

The goal of this study is to demonstrate how a DPSS laser beam's quality parameters can be simultaneously optimized through pump current tuning. Two DPSS lasers of the same make and model were used where the laser diode pump current was first varied to ascertain the lowest RMS noise region. The lowest noise was found to be 0.13% in this region and the best M{sup 2} value of 1.0 and highest laser output power were simultaneously attained at the same current point. The laser manufacturer reported a M{sup 2} value of 1.3 and RMS noise value of .14% for these lasers. This study therefore demonstrates that pump current tuning a DPSS laser can simultaneously optimize RMS Noise, Power and M{sup 2} values. Future studies will strive to broaden the scope of the beam quality parameters impacted by current tuning.

Omohundro, Rob; /Newport Spectra-Physics, Santa Clara; Callen, Alice; /SLAC; Sukuta, Sydney; /San Jose City Coll.

2012-03-30T23:59:59.000Z

272

Acquisition and registration of aerial video imagery of urban traffic  

SciTech Connect

The amount of information available about urban traffic from aerial video imagery is extremely high. Here we discuss the collection of such video imagery from a helicopter platform with a low-cost sensor, and the post-processing used to correct radial distortion in the data and register it. The radial distortion correction is accomplished using a Harris model. The registration is implemented in a two-step process, using a globally applied polyprojective correction model followed by a fine scale local displacement field adjustment. The resulting cleaned-up data is sufficiently well-registered to allow subsequent straight-forward vehicle tracking.

Loveland, Rohan C [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

273

Removing 1/f noise stripes in cosmic microwave background anisotropy observations  

E-Print Network (OSTI)

Removal of systematic effects is crucial in present and future CMB experiments mapping large fraction of the sky. Accurate CMB measurements ask for multi-feed array instruments observing the sky with a redundant scanning strategy covering the same region of the sky on different time scales and with different detectors for a better control of systematic effects. We investigate here the capability to suppress 1/f noise features in Time Ordered Data (TOD) by using the destriping technique described in Maino et al. (1999), under realistic assumptions for crossing condition between different scan circles and sky signal fluctuations on small angular scales. We consider as working case, Planck-LFI simulated observations with few arminutes pixel size convolved with LFI beam resolutions. We also extend the analysis to high values of the knee-frequency and found a residual additional noise rms ~31% larger than the pure white noise rms at fk=1 Hz which could be a critical issue in the extraction of the CMB angular power spectrum. Furthermore we verified that destriping quality does not significantly depend on the receiver sensitivity whereas it improves proportionally to the improvement of sampling rate. Therefore given a noise level, the higher the sampling rate, the better the destriping quality.

D. Maino; C. Burigana; K. M. Gorski; N. Mandolesi; M. Bersanelli

2002-02-14T23:59:59.000Z

274

Chaos and Noise in Galactic Potentials  

E-Print Network (OSTI)

ABBREVIATED ABSTRACT: This paper summarises an investigation of the effects of weak friction and noise in time-independent, nonintegrable potentials which admit both regular and stochastic orbits. The aim is to understand the qualitative effects of internal and external irregularities associated, e.g., with discreteness effects or couplings to an external environment, which stars in any real galaxy must experience. The two principal conclusions are: (1) These irregularities can be important on time scales much shorter than the natural relaxation time scale t_R associated with the friction and noise. For stochastic orbits friction and noise induce an average exponential divergence from the unperturbed Hamiltonian trajectory at a rate set by the value of the local Lyapunov exponent. Even weak noise can make a pointwise interpretation of orbits suspect already on time scales much shorter than t_R. (2) The friction and noise can also have significant effects on the statistical properties of ensembles of stochastic orbits, these also occurring on time scales much shorter than t_R. Potential implications for galactic dynamics are discussed, including the problem of shadowing.

Salman Habib; Henry E. Kandrup; M. Elaine Mahon

1994-09-19T23:59:59.000Z

275

Noise minimization in eukaryotic gene expression  

Science Conference Proceedings (OSTI)

All organisms have elaborate mechanisms to control rates of protein production. However, protein production is also subject to stochastic fluctuations, or noise. Several recent studies in Saccharomyces cerevisiae and Escherichia coli have investigated the relationship between transcription and translation rates and stochastic fluctuations in protein levels, or more generally, how such randomness is a function of intrinsic and extrinsic factors. However, the fundamental question of whether stochasticity in protein expression is generally biologically relevant has not been addressed, and it remains unknown whether random noise in the protein production rate of most genes significantly affects the fitness of any organism. We propose that organisms should be particularly sensitive to variation in the protein levels of two classes of genes: genes whose deletion is lethal to the organism and genes that encode subunits of multiprotein complexes. Using an experimentally verified model of stochastic gene expression in S. cerevisiae, we estimate the noise in protein production for nearly every yeast gene, and confirm our prediction that the production of essential and complex-forming proteins involves lower levels of noise than does the production of most other genes. Our results support the hypothesis that noise in gene expression is a biologically important variable, is generally detrimental to organismal fitness, and is subject to natural selection.

Fraser, Hunter B.; Hirsh, Aaron E.; Giaever, Guri; Kumm, Jochen; Eisen, Michael B.

2004-01-15T23:59:59.000Z

276

Occupational Noise Exposure and its Potential Health Effects  

Science Conference Proceedings (OSTI)

This issue brief provides the electric power industry with a snapshot of the current scientific knowledge on worker health and safety risks associated with noise exposure. Noise exposure types are varied and include continuous, intermittent and/or impulse noise. Prolonged occupational exposure to continuous noise or acoustic trauma can cause noise-induced hearing loss. Recent scientific data from the aluminum industry suggest that those exposed below levels requiring hearing protective devices may ...

2012-12-31T23:59:59.000Z

277

Interconnect Coupling Noise in CMOS VLSI Circuits  

E-Print Network (OSTI)

Interconnect between a CMOS driver and re- ceiver can be modeled as a 1ossy transmission line in high speed CMOS VLSI circuits as transition times become comparable to or less than the time of flight delay of the signal through the low resistivity interconnect. In this paper, closed form expressions for the coupling noise between adjacent interconnect are presented to estimate the coupling noise voltage on a quiet line. These expressions are based on an assumption that the interconnections are loosely coupled, where the effect of the coupling noise on the waveform of the active line is small and can be ne- glected. It is demonstrated that the output impedance of the CMOS driver should preferably be comparable to the interconnect impedance in order to reduce the propagation delay of the CMOS driver stage.

Kevin T. Tang; Eby G. Friedman

1999-01-01T23:59:59.000Z

278

Chaos and noise in galactic potentials  

Science Conference Proceedings (OSTI)

This paper summarizes an investigation of the effects of weak friction and noise in time-independent, nonintegrable two-dimensional potentials that admit both regular and stochastic orbits. The aim is to understand the qualitative effects of internal and external irregularities associated with discreteness effects or couplings to an external environment, which stars in any real galaxy must experience. It is found that these irregularities can be important already on timescales much shorter than the natural relaxation timescale t{sub R} associated with two-body relaxation. In particular, for stochastic orbits friction and noise result in an exponential divergence from the unperturbed Hamiltonian trajectory, at a rate set by the value of the local Lyapunov exponent, which persists even for relatively large deviations from the unperturbed trajectory. Friction and noise can also have significant effects on the {ital statistical} properties of ensembles of stochastic orbits. Stochastic orbits may be divided into two classes, confined or sticky stochastic orbits which are trapped near islands of regularity, and unconfined or filling stochastic orbits that travel unimpeded throughout a stochastic sea. In the absence of friction and noise, transitions between confined and filling stochastic orbits are very slow. However, even very weak friction and noise can drastically accelerate such transitions, leading to an approach toward a statistical equilibrium on timescales {lt}t{sub R}. In the two-dimensional models studied in this paper, there are cases for which t{sub R} exceeds 10{sup 6} crossing times where friction and noise can induce transitions for more than half the orbits within 100 crossing times, this corresponding in galaxies to a Hubble time t{sub H}. Implications for galactic dynamics are discussed. {copyright} {ital 1997} {ital The American Astronomical Society}

Habib, S. [T-6, Theoretical Astrophysics, and T-8, Elementary Particles and Field Theory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [T-6, Theoretical Astrophysics, and T-8, Elementary Particles and Field Theory, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Kandrup, H.E. [Department of Astronomy and Institute for Fundamental Theory, University of Florida, Gainesville, Florida 32611 (United States)] [Department of Astronomy and Institute for Fundamental Theory, University of Florida, Gainesville, Florida 32611 (United States); [Department of Physics, University of Florida, Gainesville, Florida 32611 (United States); Mahon, M.E. [Department of Astronomy and Institute for Fundamental Theory, University of Florida, Gainesville, Florida 32611 (United States)] [Department of Astronomy and Institute for Fundamental Theory, University of Florida, Gainesville, Florida 32611 (United States)

1997-05-01T23:59:59.000Z

279

Genetic noise control via protein oligomerization  

Science Conference Proceedings (OSTI)

Gene expression in a cell entails random reaction events occurring over disparate time scales. Thus, molecular noise that often results in phenotypic and population-dynamic consequences sets a fundamental limit to biochemical signaling. While there have been numerous studies correlating the architecture of cellular reaction networks with noise tolerance, only a limited effort has been made to understand the dynamical role of protein-protein associations. We have developed a fully stochastic model for the positive feedback control of a single gene, as well as a pair of genes (toggle switch), integrating quantitative results from previous in vivo and in vitro studies. In particular, we explicitly account for the fast protein binding-unbinding kinetics, RNA polymerases, and the promoter/operator sequences of DNA. We find that the overall noise-level is reduced and the frequency content of the noise is dramatically shifted to the physiologically irrelevant high-frequency regime in the presence of protein dimerization. This is independent of the choice of monomer or dimer as transcription factor and persists throughout the multiple model topologies considered. For the toggle switch, we additionally find that the presence of a protein dimer, either homodimer or heterodimer, may significantly reduce its intrinsic switching rate. Hence, the dimer promotes the robust function of bistable switches by preventing the uninduced (induced) state from randomly being induced (uninduced). The specific binding between regulatory proteins provides a buffer that may prevent the propagation of fluctuations in genetic activity. The capacity of the buffer is a non-monotonic function of association-dissociation rates. Since the protein oligomerization per se does not require extra protein components to be expressed, it provides a basis for the rapid control of intrinsic or extrinsic noise. The stabilization of phenotypically important toggle switches, and nested positive feedback loops in general, is of direct implications to organism fitness. Finally, noise control through oligomerization suggests avenues for the design of robust synthetic gene circuits for engineering purposes.

Ghim, C; Almaas, E

2008-06-12T23:59:59.000Z

280

Amplitude modulation of wind turbine noise  

E-Print Network (OSTI)

Due to swish and thump amplitude modulation, the noise of wind turbines cause more annoyance than other environmental noise of the same average level. The wind shear accounts for the thump modulation (van den Berg effect). Making use of the wind speed measurements at the hub height, as well as at the top and the bottom of the rotor disc (Fig.1), the non-standard wind profile is applied. It causes variations in the A-weighted sound pressure level, LpA. The difference between the maximum and minimum of LpA characterizes thump modulation (Fig.2).

Makarewicz, Rufin

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "quality noise traffic" 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

Underwater radiated noise measurements of a noise?reduced research vessel: Comparison between a U.S. Navy noise range and a simple hydrophone mooring.  

Science Conference Proceedings (OSTI)

[A feasibility study was undertaken to characterize underwater radiated noise for a new class of noise?reduced fisheries research vessels using a field?deployable hydrophone system. Recent studies have demonstrated that vessel?radiated noise can impact the behavior of fish

Alex De Robertis; Christopher D. Wilson; Peter H. Dahl

2011-01-01T23:59:59.000Z

282

Underwater radiated noise measurements of a noise-reduced research vessel: comparison between a US Navy noise range and a simple hydrophone mooring.  

Science Conference Proceedings (OSTI)

A feasibility study was undertaken to characterize underwater radiated noise for a new class of noise-reduced fisheries research vessels using a field-deployable hydrophone system. Recent studies have demonstrated that vessel-radiated noise can impact the behavior of fish

Alex De Robertis; Christopher Wilson

2014-01-01T23:59:59.000Z

283

Active noise control: A tutorial for HVAC designers  

Science Conference Proceedings (OSTI)

This article will identify the capabilities and limitations of ANC in its application to HVAC noise control. ANC can be used in ducted HVAC systems to cancel ductborne, low-frequency fan noise by injecting sound waves of equal amplitude and opposite phase into an air duct, as close as possible to the source of the unwanted noise. Destructive interference of the fan noise and injected noise results in sound cancellation. The noise problems that it solves are typically described as rumble, roar or throb, all of which are difficult to address using traditional noise control methods. This article will also contrast the use of active against passive noise control techniques. The main differences between the two noise control measures are acoustic performance, energy consumption, and design flexibility. The article will first present the fundamentals and basic physics of ANC. The application to real HVAC systems will follow.

Gelin, L.J.

1997-08-01T23:59:59.000Z

284

Analysis of traffic accident severity using Decision Rules via Decision Trees  

Science Conference Proceedings (OSTI)

A Decision Tree (DT) is a potential method for studying traffic accident severity. One of its main advantages is that Decision Rules (DRs) can be extracted from its structure. And these DRs can be used to identify safety problems and establish certain ... Keywords: Decision Rules, Decision Trees, Road safety, Severity, Traffic accident

JoaquíN AbelláN, Griselda LóPez, Juan De OñA

2013-11-01T23:59:59.000Z

285

Based on Two Swarm Optimized Algorithm of Neural Network to Prediction the Switch's Traffic of Coal  

Science Conference Proceedings (OSTI)

Coal accurately predict multi-channel network traffic monitoring network for transmission to enhance and improve the QoS is very important, the characteristics of coalmine monitoring network, the first neural network model was constructed, followed by ... Keywords: Coal, network traffic, ant colony algorithm, Particle swarm optimization

Xiao-qiang Shao

2011-07-01T23:59:59.000Z

286

On the Modeling of Traffic and Crowds: A Survey of Models, Speculations, and Perspectives  

Science Conference Proceedings (OSTI)

This paper presents a review and critical analysis of the mathematical literature concerning the modeling of vehicular traffic and crowd phenomena. The survey of models deals with the representation scales and the mathematical frameworks that are used ... Keywords: complexity, crowds and swarm dynamics, living systems, scaling, vehicular traffic

Nicola Bellomo; Christian Dogbe

2011-08-01T23:59:59.000Z

287

Novel hybrid approach to data-packet-flow prediction for improving network traffic analysis  

Science Conference Proceedings (OSTI)

Forecast of the flow of data packets between client and server for a network traffic analysis is viewed as a part of web analytics. Thousands of web-smart businesses depend on web analytics to improve website conversions, reduce marketing costs, facilitate ... Keywords: Adaptive neuro-fuzzy inference system, Flow of data packets, Network traffic analysis, Nonlinear generalized autoregressive conditional heteroscedasticity, Quantum minimization

Bao Rong Chang; Hsiu Fen Tsai

2009-06-01T23:59:59.000Z

288

Istanbul Strait marine traffic simulation using multiple serially connected machinery concept  

Science Conference Proceedings (OSTI)

Istanbul Strait is one of the most crowded, narrowest straits in the world. Even though the number of accidents has been decreased in recent years, the risk is still high. Simulation of marine traffic in Istanbul Strait is very important to be able to ... Keywords: Istanbul Straits, marine traffic simulation, ship transition simulation

F. Camci; F. Eldemir; O. Uysal; Ilyas Ustun

2009-07-01T23:59:59.000Z

289

CoCoSpot: Clustering and recognizing botnet command and control channels using traffic analysis  

Science Conference Proceedings (OSTI)

We present CoCoSpot, a novel approach to recognize botnet command and control channels solely based on traffic analysis features, namely carrier protocol distinction, message length sequences and encoding differences. Thus, CoCoSpot can deal with obfuscated ... Keywords: Botnet C&C, Botnet detection, Network security, Traffic analysis

Christian J. Dietrich; Christian Rossow; Norbert Pohlmann

2013-02-01T23:59:59.000Z

290

VBR MPEG Video Traffic Dynamic Prediction Based on the Modeling and Forecast of Time Series  

Science Conference Proceedings (OSTI)

The variable-bit-rate traffic characteristic brings a large complication to the utilization of network resources, especially bandwidth. To solve this problem, this paper proposes a dynamic prediction scheme of MPEG video traffic. We first advance an ... Keywords: MPEG, video trace, forecast, time series, ARMA

Jun Dai; Jun Li

2009-08-01T23:59:59.000Z

291

On performance evaluation of handling streaming traffic in IP networks using TFRC protocol  

Science Conference Proceedings (OSTI)

This paper deals with the performance evaluation of handling streaming traffic in IP best effort networks using TFRC protocol. In our studies we check and discuss an influence of video on demand traffic and different network conditions on TFRC congestion ... Keywords: IP network, TCP-friendly, best-effort, video on demand

Kacper Kurowski; Halina Tarasiuk

2008-05-01T23:59:59.000Z

292

A novel approach for traffic accidents sanitary resource allocation based on multi-objective genetic algorithms  

Science Conference Proceedings (OSTI)

The development of communication technologies integrated in vehicles allows creating new protocols and applications to improve assistance in traffic accidents. Combining this technology with intelligent systems will permit to automate most of the decisions ... Keywords: Multi-objective genetic algorithms, Resource allocation, Traffic accidents assistance

Manuel Fogue; Piedad Garrido; Francisco J. Martinez; Juan-Carlos Cano; Carlos T. Calafate; Pietro Manzoni

2013-01-01T23:59:59.000Z

293

Greenhouse Gas Pollution in the Stratosphere Due to Increasing Airplane Traffic, Effects On the Environment  

E-Print Network (OSTI)

Greenhouse Gas Pollution in the Stratosphere Due to Increasing Airplane Traffic, Effects temperatures have increased much more than can be explained by changes in the concentration of greenhouse gases traffic round the clock and around the globe which is contributing to higher concentrations of greenhouse

Murty, Katta G.

294

Flexible, extensible, open-source and affordable FPGA-based traffic generator  

Science Conference Proceedings (OSTI)

As high-speed links become ubiquitous in current networks, testing new algorithms at high speed is essential for researchers. This task often makes it necessary to generate traffic with some specified features : distribution of packet sizes, payload ... Keywords: FPGA, NetFPGA 10G, combo, flexible, open-source, traffic generator

Tristan Groléat; Matthieu Arzel; Sandrine Vaton; Alban Bourge; Yannick Le Balch; Hicham Bougdal; Manuel Aranaz Padron

2013-06-01T23:59:59.000Z

295

Throughput Optimal Scheduling in the presence of Heavy-Tailed Traffic  

E-Print Network (OSTI)

Throughput Optimal Scheduling in the presence of Heavy-Tailed Traffic Krishna Jagannathan, Mihalis of the steady-state queue occupancies under throughput optimal scheduling in the presence of heavy of the queues receives traffic that is heavy-tailed (the "heavy queue"), and the other receives light

Tsitsiklis, John

296

Delay Stability Regions of the Max-Weight Policy under Heavy-Tailed Traffic  

E-Print Network (OSTI)

Delay Stability Regions of the Max-Weight Policy under Heavy-Tailed Traffic Mihalis G. Markakis operated under the Max- Weight scheduling policy, for the case where one of the queues is fed by heavy system exemplifies an intricate phenomenon whereby heavy-tailed traffic at one queue may or may

Tsitsiklis, John

297

Optimizing urban traffic flow using Genetic Algorithm with Petri net analysis as fitness function  

Science Conference Proceedings (OSTI)

This paper describes a new methodology adopted for urban traffic stream optimization. By using Petri net analysis as fitness function of a Genetic Algorithm, an entire urban road network is controlled in real time. With the advent of new technologies ... Keywords: Genetic Algorithm, Optimization, Petri net, Urban traffic

Henrique Dezani, Regiane D. S. Bassi, Norian Marranghello, Luís Gomes, Furio Damiani, Ivan Nunes Da Silva

2014-01-01T23:59:59.000Z

298

A Resource Intensive Traffic-Aware Scheme for Cluster-based Energy Conservation in Wireless Devices  

Science Conference Proceedings (OSTI)

Wireless traffic that is destined for a certain device in a network, can be exploited in order to minimize the availability and delay trade-offs, and mitigate the Energy consumption. The Energy Conservation (EC) mechanism can be node-centric by considering ... Keywords: Energy Conservation, Traffic-aware scheme, End-to-end communication, Capacity consideraiton for Energy Harvesting

Marios C. Charalambous; Constandinos X. Mavromoustakis; Muneer Bani Yassein

2012-06-01T23:59:59.000Z

299

RadiaLE: A framework for designing and assessing link quality estimators in wireless sensor networks  

Science Conference Proceedings (OSTI)

Stringent cost and energy constraints impose the use of low-cost and low-power radio transceivers in large-scale wireless sensor networks (WSNs). This fact, together with the harsh characteristics of the physical environment, requires a rigorous WSN ... Keywords: Channel, Experimentation, Link quality estimation, Measurements, Performance, Testbed, Traffic pattern

Nouha Baccour; Anis Koubía; Maissa Ben Jamía; Denis do Rosário; Habib Youssef; Mário Alves; Leandro B. Becker

2011-09-01T23:59:59.000Z

300

Environmental quality  

SciTech Connect

Major emphasis is placed on man environment interactions and environment management. Topics include: ecology and living resources; the global environment; water and air quality; toxic substances and environmental health; energy; natural resources; NEPA regulations; and land use.

1980-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "quality noise traffic" 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.


301

Air Quality  

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

What We Monitor & Why » What We Monitor & Why » Air Quality Air Quality To preserve our existing wilderness-area air quality, LANL implements a conscientious program of air monitoring. April 12, 2012 Real-time data monitoring for particulate matter An air monitoring field team member tests one of LANL's tapered element oscillating microbalance samplers, which collects real-time particulate matter data. Contact Environmental Communication & Public Involvement P.O. Box 1663 MS M996 Los Alamos, NM 87545 (505) 667-0216 Email LANL monitors air quality 24 hours a day, 365 days a year. Why we monitor air LANL monitors many different pathways in order to assess their impact on workers, the public, animals, and plants. We monitor the air around the Laboratory to ensure our operations are not affecting the air of nearby

302

The air quality impact of aviation in future-year emissions scenarios  

E-Print Network (OSTI)

The rapid growth of aviation is critical to the world and US economy, and it faces several important challenges among which lie the environmental impacts of aviation on noise, climate and air quality. The first objective ...

Ashok, Akshay

2011-01-01T23:59:59.000Z

303

U-134: Apache Traffic Server Host Header Processing Flaw Lets Remote Users  

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

4: Apache Traffic Server Host Header Processing Flaw Lets 4: Apache Traffic Server Host Header Processing Flaw Lets Remote Users Deny Service U-134: Apache Traffic Server Host Header Processing Flaw Lets Remote Users Deny Service March 27, 2012 - 7:00am Addthis PROBLEM: Apache Traffic Server Host Header Processing Flaw Lets Remote Users Deny Service PLATFORM: Versions prior to 3.0.4 and 3.1.3 ABSTRACT: A vulnerability was reported in Apache Traffic Server. A remote user can cause denial of service conditions. reference LINKS: SecurityTracker Alert ID: 1026847 CVE-2012-0256 Secunia Advisory SA48509 IMPACT ASSESSMENT: High Discussion: A remote user can send a request with a specially crafted 'Host' header value to trigger a heap allocation error and cause the target service to crash. Impact: A remote user can cause the target service to crash.

304

U-134: Apache Traffic Server Host Header Processing Flaw Lets Remote Users  

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

34: Apache Traffic Server Host Header Processing Flaw Lets 34: Apache Traffic Server Host Header Processing Flaw Lets Remote Users Deny Service U-134: Apache Traffic Server Host Header Processing Flaw Lets Remote Users Deny Service March 27, 2012 - 7:00am Addthis PROBLEM: Apache Traffic Server Host Header Processing Flaw Lets Remote Users Deny Service PLATFORM: Versions prior to 3.0.4 and 3.1.3 ABSTRACT: A vulnerability was reported in Apache Traffic Server. A remote user can cause denial of service conditions. reference LINKS: SecurityTracker Alert ID: 1026847 CVE-2012-0256 Secunia Advisory SA48509 IMPACT ASSESSMENT: High Discussion: A remote user can send a request with a specially crafted 'Host' header value to trigger a heap allocation error and cause the target service to crash. Impact: A remote user can cause the target service to crash.

305

Digitization Noise in Power Spectral Analysis  

Science Conference Proceedings (OSTI)

It is well-known that the digitization noise variance is ?2/12 for a continuous time series sampled with the signal resolution ?. It is also generally accepted that this variance often has a white-power spectral density. We have examined in ...

L. Kristensen; P. Kirkegaard

1987-06-01T23:59:59.000Z

306

Anticipative Ramp Metering Control for Freeway Traffic Networks T. Bellemans, B. De Schutter, and B. De Moor  

E-Print Network (OSTI)

Anticipative Ramp Metering Control for Freeway Traffic Networks T. Bellemans, B. De Schutter, and B.deschutter@dcsc.tudelft.nl Abstract-- We develop an anticipative model-based predictive traffic control approach for ramp metering in freeway traffic networks. If ramp metering is imple- mented in a freeway network with alternative routes

307

Urban traffic flow forecasting using Gauss-SVR with cat mapping, cloud model and PSO hybrid algorithm  

Science Conference Proceedings (OSTI)

In order to improve forecasting accuracy of urban traffic flow, this paper applies support vector regression (SVR) model with Gauss loss function (namely Gauss-SVR) to forecast urban traffic flow. By using the input historical flow data as the validation ... Keywords: Cat mapping, Chaos theory, Cloud model, Particle Swarm Optimization, Support vector regression, Traffic flow forecasting

Ming-Wei Li; Wei-Chiang Hong; Hai-Gui Kang

2013-01-01T23:59:59.000Z

308

Real-time road traffic forecasting using regime-switching space-time models and adaptive LASSO  

Science Conference Proceedings (OSTI)

Smart transportation technologies require real-time traffic prediction to be both fast and scalable to full urban networks. We discuss a method that is able to meet this challenge while accounting for nonlinear traffic dynamics and space-time dependencies ... Keywords: adaptive LASSO, real-time predictions, threshold regressions, traffic forecasting

Yiannis Kamarianakis; Wei Shen; Laura Wynter

2012-07-01T23:59:59.000Z

309

Noise Reduction with Microphone Arrays for Speaker Identification  

SciTech Connect

Reducing acoustic noise in audio recordings is an ongoing problem that plagues many applications. This noise is hard to reduce because of interfering sources and non-stationary behavior of the overall background noise. Many single channel noise reduction algorithms exist but are limited in that the more the noise is reduced; the more the signal of interest is distorted due to the fact that the signal and noise overlap in frequency. Specifically acoustic background noise causes problems in the area of speaker identification. Recording a speaker in the presence of acoustic noise ultimately limits the performance and confidence of speaker identification algorithms. In situations where it is impossible to control the environment where the speech sample is taken, noise reduction filtering algorithms need to be developed to clean the recorded speech of background noise. Because single channel noise reduction algorithms would distort the speech signal, the overall challenge of this project was to see if spatial information provided by microphone arrays could be exploited to aid in speaker identification. The goals are: (1) Test the feasibility of using microphone arrays to reduce background noise in speech recordings; (2) Characterize and compare different multichannel noise reduction algorithms; (3) Provide recommendations for using these multichannel algorithms; and (4) Ultimately answer the question - Can the use of microphone arrays aid in speaker identification?

Cohen, Z

2011-12-22T23:59:59.000Z

310

Fermilab | Traffic Safety at Fermilab | Questions & Answers  

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

Questions & Answers Questions & Answers I received an e-mail stating that I have received a traffic citation, but I did not. What do I do? The email I received states that I have five working days after receiving a citation to appeal, what does that mean? I filled out the citation appeal form and submitted it, what happens next? I missed the five day deadline, what do I do now? I lost my appeal and disagree with the results, what do I do now? I lost my appeal and received disciplinary action, what do I do now? I received a citation but did not sign it because I disagreed with the charge and that, without my signature, it would not be considered a valid citation. I received an email saying that it was a violation. Why did this happen? Why should I appeal a citation? Employees never win anyway.

311

Effects of Noise on Thorpe Scales and Run Lengths  

Science Conference Proceedings (OSTI)

Estimating the diapycnal mixing rate from standard CTD data by identifying overturning regions in the water column (the Thorpe-scale approach) provides good spatial and temporal coverage but is sometimes limited by instrument noise. This noise ...

Helen L. Johnson; Chris Garrett

2004-11-01T23:59:59.000Z

312

Random Offset Curves and Surfaces with Controllable Noise (Extended Abstract)  

E-Print Network (OSTI)

similar complex patterns often being able to be defined with the gradient noise functions. PORN is defined by replacing a static offset distance in a general offset with a gradient noise function. For example, PORN

Lee, In-Kwon

313

Correlations between Ambient Noise and the Ocean Surface Wave Field  

Science Conference Proceedings (OSTI)

Measurements of the ambient noise spectrum level N with simultaneous, coincident wind and wave measurements were made from RP FLIP in fall 1991. The measurements were designed to investigate the correlation between the ambient noise and relevant ...

Francis C. Felizardo; W. Kendall Melville

1995-04-01T23:59:59.000Z

314

Application of a computer model for predicting remote noise levels  

Science Conference Proceedings (OSTI)

The prediction of noise levels at selected remote locations is an integral part of estimating the environmental impact of new stationary sources or of noise reduction for existing facilities. A three?dimensional computermodel

S. H. Judd; S. L. Dryden

1975-01-01T23:59:59.000Z

315

Modeling and managing separation for noise abatement arrival procedures  

E-Print Network (OSTI)

Aircraft noise is a significant concern to communities near airports, and therefore a constraint to the growth of aviation. Advanced noise abatement approach and arrival procedures have been shown in previous studies and ...

Ren, Liling

2007-01-01T23:59:59.000Z

316

Uniform-Distribution Attribute Noise Learnability Nader H. Bshouty  

E-Print Network (OSTI)

by Shackelford and Volper [10] for the case of k-DNF expressions. Their uniform attribute noise model consists] that is the same for every attribute. While Shackelford and Volper assumed that the learner knows the noise rate p

Jackson, Jeffrey

317

Major Subject: Computer EngineeringAN APPROACH FOR IMPROVING PERFORMANCE OF AGGREGATE VOICE-OVER-IP TRAFFIC  

E-Print Network (OSTI)

Chair of Advisory Committee: Dr. A. L. Narasimha Reddy The emerging popularity and interest in Voice-over-IP (VoIP) has been accompanied by customer concerns about voice quality over these networks. The lack of an appropriate real-time capable infrastructure in packet networks along with the threats of denial-of service (DoS) attacks can deteriorate the service that these voice calls receive. And these conditions contribute to the decline in call quality in VoIP applications; therefore, error-correcting/concealing techniques remain the only alternative to provide a reasonable protection for VoIP calls against packet losses. Traditionally, each voice call employs its own end-to-end forward-error-correction (FEC) mechanisms. In this paper, we show that when VoIP calls are aggregated over a provider's link, with a suitable linear-time encoding for the aggregated voice traffic, considerable quality improvement can be achieved with little redundancy. We show that it is possible to achieve rates closer to channel capacity as more calls are combined with very small output loss rates even in the presence of significant packet loss rates in the network. The advantages of the proposed scheme far exceed similar or other coding techniques applied to individual

Camelia Al-najjar; Weiping Shi; Chanan Singh

2005-01-01T23:59:59.000Z

318

Optomechanical entanglement in the presence of laser phase noise  

SciTech Connect

We study the simplest optomechanical system in the presence of laser phase noise (LPN) using the covariance matrix formalism. We show that for any LPN model with a finite correlation time, the destructive effect of the phase noise is especially strong in the bistable regime. This explains why ground-state cooling is still possible in the presence of phase noise, as it happens far away from the bistable regime. We also show that the optomechanical entanglement is strongly affected by phase noise.

Ghobadi, R. [Institute for Quantum Information Science and Department of Physics and Astronomy, University of Calgary, Calgary, Alberta, T2N 1N4 (Canada); Department of Physics, Sharif University of Technology, Tehran (Iran, Islamic Republic of); Bahrampour, A. R. [Department of Physics, Sharif University of Technology, Tehran (Iran, Islamic Republic of); Simon, C. [Institute for Quantum Information Science and Department of Physics and Astronomy, University of Calgary, Calgary, Alberta, T2N 1N4 (Canada)

2011-12-15T23:59:59.000Z

319

Examining the Spatial Distribution of Externalities: Freight Rail Traffic and Home Values in Los Angeles  

E-Print Network (OSTI)

This paper measures the impact of infrastructure expansion on local home values and examines the persistence of that impact over distance. Specifically, I exploit a natural experiment in which rail traffic from the Los Angeles seaport, one of the busiest in the country, was permanently redirected from several tracks to a central line, termed the Alameda Corridor. I link a rich, repeat-sale housing dataset to plausibly exogenous changes in local rail traffic to estimate these effects, controlling for local price trends using a Case-Shiller style housing index. Using the actual traffic changes the result is an estimated $3500 decrease in average home value where traffic increased and a $1300 increase in average home value where rail traffic was reduced. The welfare impact of concentrating a negative externality on a smaller population should depend on the convexity of the cost function, but I find evidence that suggests the marginal cost is symmetric for winners and losers. Instead, the total welfare impact hinges on the efficiency gains achieved by relocating the traffic from circuitous routes to the more direct Alameda Corridor, thereby affecting fewer homeowners. While the net gains are minimal, the re-routing of traffic resulted in a transfer of housing wealth of approximately $200 million.

Michael Futch

2011-01-01T23:59:59.000Z

320

Noise Interaction Between Power Distribution Grids and Substrate  

Science Conference Proceedings (OSTI)

We have investigated the interaction between power delivery and substrate coupling in terms of noise. From our results, we identify that an increased density of substrate contacts does not to any significance decrease noise on the power supply lines. ... Keywords: Substrate noise, power supply

Daniel A. Andersson; Simon Kristiansson; Lars J. Svensson; Per Larsson-Edefors; Kjell O. Jeppson

2008-03-01T23:59:59.000Z

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


321

A noise rejection deadbeat control technique for active power filter  

Science Conference Proceedings (OSTI)

Compared with power filter, active power filter has a lot of advantages and it is an efficient technique to eliminate or limit the harmonic pollution in power system. However, the control of active power filter is very complex, and the control of current ... Keywords: active power filter, current control technique, deadbeat control, noise rejection, periodic noise, resetting integrator, sampling noise

Li-Dan Zhou; Mansoor Mansoor; Qian Ai; Da Xie; Chen Chen

2005-10-01T23:59:59.000Z

322

Determination of parameters of a nuclear reactor through noise measurements  

DOE Patents (OSTI)

A method of measuring parameters of a nuclear reactor by noise measurements is described. Noise signals are developed by the detectors placed in the reactor core. The polarity coincidence between the noise signals is used to develop quantities from which various parameters of the reactor can be calculated. (auth)

Cohn, C.E.

1975-07-15T23:59:59.000Z

323

Influence of refraction on wind turbine noise  

E-Print Network (OSTI)

A semi-empirical method is applied to calculate the time-average sound level of wind turbine noise generation and propagation. Both are affected by wind shear refraction. Under upwind conditions the partially ensonified zone separates the fully ensonified zone (close to the turbine) and the shadow zone (far away from the turbine). Refraction is described in terms of the wind speed linear profile fitted to the power law profile. The rotating blades are treated as a two-dimensional circular source in the vertical plane. Inside the partially ensonified zone the effective A-weighted sound power decreases to zero when the receiver moves from the turbine toward the shadow zone. The presented results would be useful in practical applications to give a quick estimate of the effect of refraction on wind turbine noise.

Makarewicz, Rufin

2013-01-01T23:59:59.000Z

324

Low Noise Borehole Triaxial Seismometer Phase II  

Science Conference Proceedings (OSTI)

This report describes the preliminary design and the effort to date of Phase II of a Low Noise Borehole Triaxial Seismometer for use in networks of seismic stations for monitoring underground nuclear explosions. The design uses the latest technology of broadband seismic instrumentation. Each parameter of the seismometer is defined in terms of the known physical limits of the parameter. These limits are defined by the commercially available components, and the physical size constraints. A theoretical design is proposed, and a preliminary prototype model of the proposed instrument has been built. This prototype used the sensor module of the KS2000. The installation equipment (hole locks, etc.) has been designed and one unit has been installed in a borehole. The final design of the sensors and electronics and leveling mechanism is in process. Noise testing is scheduled for the last quarter of 2006.

Kerr, James D; McClung, David W

2006-11-06T23:59:59.000Z

325

Nonequilibrium noise in electrophoresis: the microion wind  

E-Print Network (OSTI)

We analyze theoretically the dynamics of a single colloidal particle in an externally applied electric field. The thermal motions of microions lead to an anisotropic, nonequilibrium source of noise, pro- portional to the field, in the effective Langevin equation for the colloid. The fluctuation-dissipation ratio depends strongly on frequency, and the colloid if displaced from its steady-state position relaxes with a velocity not proportional to the gradient of the logarithm of the steady-state probability.

Suropriya Saha; Sriram Ramaswamy

2009-07-02T23:59:59.000Z

326

Quality Assurance: Underlying Quality Principles  

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

Underlying Quality Principles Underlying Quality Principles These principles are consistent with Integrated Safety Management Policy, P 450.4A and support ISM implementation. Define Policies and Objectives--Ensure they are Understood and Accepted. Management must set expectations for the organization as a whole before employees can do their jobs, satisfy their customers, and strive to improve the quality of their work. This is accomplished by developing and implementing specific policies and objectives that reflect the operating philosophy of the facility's management. Once these policies and objectives have been established, all managers must take the necessary actions to ensure that each employee shares their vision of the organization's purpose. Specify Roles and Responsibilities--Ensure they are Understood and Accepted.

327

Effect of personal and situational variables on noise annoyance: With special reference to implications for en route noise. Final report  

SciTech Connect

Over 680 publications from 282 social surveys of residents' reactions to environmental noise have been examined to locate 495 published findings on 26 topics concerning non-noise explanations for residents' reactions to environmental noise. This report (1) tabulates the evidence on the 26 response topics, (2) identifies the 495 findings, and (3) discusses the implications for en route noise assessment. After controlling for noise level, over half of the social survey evidence indicates that noise annoyance is not strongly affected by any of the nine demographic variables examined (age, sex, social status, income, education, homeownership, type of dwelling, length of residence, or receipt of benefits from the noise source), but is positively associated with each of the five attitudinal variables examined (a fear of danger from the noise source, a sensitivity towards noise generally, the belief that the authorities can control the noise, the awareness of non-noise impacts of the source, and the belief that the noise source is not important).

Not Available

1992-08-01T23:59:59.000Z

328

Laboratory Management (Quality) Systems  

Science Conference Proceedings (OSTI)

Laboratory Management (Quality) Systems. NISTIR 7028 Type Evaluation Quality Manual Template. This NISTIR has been ...

2012-05-02T23:59:59.000Z

329

V-201: Cisco Intrusion Prevention System SSP Fragmented Traffic Denial of  

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

1: Cisco Intrusion Prevention System SSP Fragmented Traffic 1: Cisco Intrusion Prevention System SSP Fragmented Traffic Denial of Service Vulnerability V-201: Cisco Intrusion Prevention System SSP Fragmented Traffic Denial of Service Vulnerability July 19, 2013 - 6:00am Addthis PROBLEM: Several vulnerabilities were reported in Cisco Intrusion Prevention System PLATFORM: Cisco ASA 5500-X Series Adaptive Security Appliances Cisco Intrusion Prevention System (IPS) 7.1 ABSTRACT: A vulnerability in the implementation of the code that processes fragmented traffic could allow an unauthenticated, remote attacker to cause the Analysis Engine process to become unresponsive or cause the affected system to reload. REFERENCE LINKS: Secunia Advisory SA54246 SecurityTracker ID: 1028806 Cisco Advisory ID: cisco-sa-20130717-ips CVE-2013-1218

330

Human factors studies of an ADS-B based traffic alerting system for general aviation  

E-Print Network (OSTI)

Several recent high profile mid-air collisions highlight the fact that mid-air collisions are a concern for general aviation. Current traffic alerting systems have limited usability in the airport environment where a ...

Silva, Sathya Samurdhi

2012-01-01T23:59:59.000Z

331

The case for coordination : equity, efficiency and passenger impacts in air traffic flow management  

E-Print Network (OSTI)

In this thesis, we develop multi-resource integer optimization formulations for coordinating Traffic Flow Management (TFM) programs with equity considerations. Our multi-resource approaches ignore aircraft connectivity ...

Fearing, Douglas (Douglas Stephen)

2010-01-01T23:59:59.000Z

332

Reducing signaling traffic in wireless ATM networks through handoff scheme improvement  

Science Conference Proceedings (OSTI)

We propose a new handoff call management scheme which reduces signaling traffic in wireless ATM networks and improves the efficiency of the virtual channel. Chaining followed by a make-break algorithm is a suitable handoff scheme for various situations. ...

Anna Ha?; Yongcan Zhang

2002-08-01T23:59:59.000Z

333

Symmetry breaking in optimal timing of traffic signals on an idealized two-way street  

E-Print Network (OSTI)

Simple physical models based on fluid mechanics have long been used to understand the flow of vehicular traffic on freeways; analytically tractable models of flow on an urban grid, however, have not been as extensively explored. In an ideal world, traffic signals would be timed such that consecutive lights turned green just as vehicles arrived, eliminating the need to stop at each block. Unfortunately, this "green wave" scenario is generally unworkable due to frustration imposed by competing demands of traffic moving in different directions. Until now this has typically been resolved by numerical simulation and optimization. Here, we develop a theory for the flow in an idealized system consisting of a long two-way road with periodic intersections. We show that optimal signal timing can be understood analytically and that there are counter-intuitive asymmetric solutions to this signal coordination problem. We further explore how these theoretical solutions degrade as traffic conditions vary and automotive dens...

Panaggio, Mark J; Hu, Peiguang; Abrams, Daniel M

2013-01-01T23:59:59.000Z

334

Human-centered automation of air traffic control operations in the terminal area  

E-Print Network (OSTI)

Introduction: Air Traffic Control operations are described extensively in the ATC manuals such as the Airman's Information Manual [1] and the ATC Controller's Handbook [2]. Mathematical analysis has also been conducted for ...

Idris, Husni Rifat

1994-01-01T23:59:59.000Z

335

VTrack: Accurate, energy-aware road traffic delay estimation using mobile phones  

E-Print Network (OSTI)

Traffic delays and congestion are a major source of inefficiency, wasted fuel, and commuter frustration. Measuring and localizing these delays, and routing users around them, is an important step towards reducing the time ...

Thiagarajan, Arvind

336

Conceptual and Scaling Evaluation of Vehicle Traffic Thermal Effects on Snow/Ice-Covered Roads  

Science Conference Proceedings (OSTI)

The potential thermal effects of traffic on road surface thermal energy balance under frost/snow cover conditions have been largely ignored in meteorological evaluations of road ice deposit conditions. Preliminary exploration of these effects, ...

Joseph M. Prusa; Moti Segal; Bradley R. Temeyer; William A. Gallus Jr.; Eugene S. Takle

2002-12-01T23:59:59.000Z

337

Widget:Motion Chart Visualization of OpenEI Traffic Statistics...  

Open Energy Info (EERE)

Motion Chart Visualization of OpenEI Traffic Statistics Jump to: navigation, search Google motion chart (Gapminder): This is the last year of OpenEI analytics for page views, time...

338

Guidelines for Funding Operations and Maintenance of Intelligent Transportation Systems/Advanced Traffic Management Systems  

E-Print Network (OSTI)

This paper summarizes the results of that effort, presenting O&M costs for more than 60 ITS elements and a discussion of procedural and institutional barriers related to traffic management O&M in Texas.

Ginger Daniels And; Ginger Daniels; Tim Starr

1997-01-01T23:59:59.000Z

339

Modeling safety case evolution – examples from the air traffic management domain  

Science Conference Proceedings (OSTI)

In order realistically and cost-effectively to realize the ATM (Air Traffic Management) 2000+ Strategy, systems from different suppliers will be interconnected to form a complete functional and operational environment, covering ground segments and aerospace. ...

Massimo Felici

2005-09-01T23:59:59.000Z

340

Traffic flow forecasting using a spatio-temporal Bayesian network predictor  

Science Conference Proceedings (OSTI)

A novel predictor for traffic flow forecasting, namely spatiotemporal Bayesian network predictor, is proposed. Unlike existing methods, our approach incorporates all the spatial and temporal information available in a transportation network to carry ...

Shiliang Sun; Changshui Zhang; Yi Zhang

2005-09-01T23:59:59.000Z

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


341

On the Improvement From Scheduling a Two-Station Queueing Network in Heavy Traffic  

E-Print Network (OSTI)

For a two-station multiclass queueing network in heavy traffic, we assess the improvement from scheduling (job release and priority sequencing) that can occur relative to Poisson input and first-come first-served (FCFS) ...

Ou, Jihong

342

Multiclass queueing systems in heavy traffic: an asymptotic approach based on distributional and conservation laws  

E-Print Network (OSTI)

We propose a new approach to analyze multiclass queueing systems in heavy traffic based on what we consider as fundamental laws in queueing systems, namely distributional and conservation laws. Methodologically, we extend ...

Bertsimas, Dimitris J.

343

Throughput Optimal Scheduling in the Presence of Heavy-Tailed Traffic  

E-Print Network (OSTI)

We investigate the tail behavior of the steady-state queue occupancies under throughput optimal scheduling in the presence of heavy-tailed traffic. We consider a system consisting of two parallel queues, served by a single ...

Jagannathan, Krishna Prasanna

344

Driving segments analysis for energy and environmental impacts of worsening traffic  

E-Print Network (OSTI)

During the last two decades, traffic congestion in the U.S. has increased from 30% to 67% of peak period travel. Further, current research shows that measures taken within transportation systems, such as adding capacity, ...

Feng, Wen, Ph. D. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

345

An 128Innovative Vehicular Traffic Combined Simulation Tool: From a Detailed Analysis to Comprehensive Results  

Science Conference Proceedings (OSTI)

This paper presents a technologically advanced analysis method to study the urban traffic problem. The integrated approach described here may also provide interesting results for studying particularly extensive and complex situations, while guaranteeing ...

Agostino G. Bruzzone; D. Rivarolo

1996-04-01T23:59:59.000Z

346

Use of Structure as a Basis for Abstraction in Air Traffic Control  

E-Print Network (OSTI)

The safety and efficiency of the air traffic control domain is highly dependent on the capabilities and limitations of its human controllers. Past research has indicated that structure provided by the airspace and procedures ...

Davison, H. J.

347

Mitigating complexity in Air Traffic Control : the role of structure-based abstractions  

E-Print Network (OSTI)

Cognitive complexity is a limiting factor on the capacity and efficiency of the Air Traffic Control (ATC) system. A multi-faceted cognitive ethnography approach shows that structure, defined as the physical and informational ...

Histon, Jonathan M

2008-01-01T23:59:59.000Z

348

Energy efficient Traffic-Aware design of on-off Multi-Layer translucent optical networks  

Science Conference Proceedings (OSTI)

Efficiency in energy consumption is attracting greater and greater attention in recent years to the point that it is becoming one of the major constraints steering the evolution of our society. In addition to developing new low-consumption devices, one ... Keywords: Daily traffic variation, Energy efficiency, Multi-shelf IP-over-WDM network, Rack/shelf power consumption model, Traffic-Aware optical network design

Giuseppe Rizzelli; Annalisa Morea; Massimo Tornatore; Olivier Rival

2012-07-01T23:59:59.000Z

349

Evolutionary safety analysis: motivations from the air traffic management domain  

E-Print Network (OSTI)

Abstract. In order realistically and cost-effectively to realize the ATM (Air Traffic Management) 2000+ Strategy, systems from different suppliers will be interconnected to form a complete functional and operational environment, covering ground segments and aerospace. Industry will be involved as early as possible in the lifecycle of ATM projects. EURO-CONTROL manages the processes that involve the definition and validation of new ATM solutions using Industry capabilities (e.g., SMEs). In practice, safety analyses adapt and reuse system design models (produced by third parties). Technical, organisational and cost-related reasons often determine this choice, although design models are unfit for safety analysis. Design models provide limited support to safety analysis, because they are tailored for system designers. The definition of an adequate model and of an underlying methodology for its construction will be highly beneficial for whom is performing safety analyses. Limited budgets and resources, often, constrain or inhibit the model definition phase as an integral part of safety analysis. This paper is concerned with problems in modeling ATM systems for safety analysis. The main objective is to highlight a model specifically targeted to support evolutionary safety analysis. 1

Massimo Felici

2005-01-01T23:59:59.000Z

350

FRIEND: A CYBER-PHYSICAL SYSTEM FOR TRAFFIC FLOW RELATED INFORMATION AGGREGATION AND DISSEMINATION  

E-Print Network (OSTI)

The major contribution of this thesis is to lay the theoretical foundations of FRIEND – A cyber-physical system for traffic Flow-Related Information aggrEgatioN and Dissemination. By integrating resources and capabilities at the nexus between the cyber and physical worlds, FRIEND will contribute to aggregating traffic flow data collected by the huge fleet of vehicles on our roads into a comprehensive, near real-time synopsis of traffic flow conditions. We anticipate providing drivers with a meaningful, color-coded, at-a-glance view of flow conditions ahead, alerting them to congested traffic. FRIEND can be used to provide accurate information about traffic flow and can be used to propagate this information. The workhorse of FRIEND is the ubiquitous lane delimiters (a.k.a. cat’s eyes) on our roadways that, at the moment, are used simply as dumb reflectors. Our main vision is that by endowing cat’s eyes with a modest power source, detection and communication capabilities they will play an important role in collecting, aggregating and disseminating traffic flow conditions to the driving public. We envision the cat’s eyes system to be supplemented by road-side units (RSU) deployed at regular intervals (e.g. every kilometer or so). The RSUs placed on opposite sides of the roadway constitute a logical

Samy S. El-tawab; Stephan Olariu (director; Hussein Abdel-wahab (member; Michele C. Weigle (member; Samy S. El-tawab; Director Dr. Stephan Olariu

2012-01-01T23:59:59.000Z

351

Turbulence ingestion noise of open rotors  

E-Print Network (OSTI)

liners, which play a crucial role in specific tone reduction for turbofans, cannot of course be used to attenuate noise from these rotors. General Electric (GE) in the US began an in-house ‘UnDucted Fan’ (UDF) research programme in 1983 and also... ), has established ambitious targets for new aircraft entering service in 2020, compared to those entering service in 2000, of a 50% reduction in fuel consumption and CO2 emissions per passenger kilometre (of which 20%, that is just under half...

Robison, Rosalyn Aruna Venner

2012-04-10T23:59:59.000Z

352

Noise Traders, Market Sentiment, and Futures Price Behavior by  

E-Print Network (OSTI)

The noise trader sentiment model of De Long, Shleifer, Summers, and Waldmann (1990a) is applied to futures markets. The theoretical results predict that overly optimistic (pessimistic) noise traders result in market prices that are greater (less) than fundamental value. Thus, returns can be predicted using the level of noise trader sentiment. The null rational expectations hypothesis is tested against the noise trader alternative using a commercial market sentiment index as a proxy for noise trader sentiment. Fama-MacBeth cross-sectional regressions test if noise traders create a systematic bias in futures prices. The time-series predictability of futures returns using known sentiment levels is tested in a Cumby-Modest market timing framework and a more general causality specification. The empirical results lead to the following conclusions. First, there is no evidence that noise trader sentiment creates a systematic bias in futures prices. Second, predictable market returns using noise trader sentiment is not characteristic of futures markets in general. Third, futures market returns at weekly intervals are characterized by low-order positive autocorrelation with relatively small autoregressive parameters. In those instances where there is evidence of noise trader effects, it is at best limited to isolated markets and particular specifications. Noise Traders, Market Sentiment, and Futures Price Behavior

Dwight R. S; Scott H. Irwin; Raymond M. Leuthold; Dwight R. S; Ers Is Manager

1997-01-01T23:59:59.000Z

353

An investigation into the use of highway traffic signals at highway-railroad grade crossings  

E-Print Network (OSTI)

Rail-highway grade crossings are amongst the most dangerous of intersections a driver will encounter. One out of every nine accidents at rail-highway crossings produces a fatality. In half of these cases, the crossing is an active crossing, meaning that active devices such as flashing lights with or without automatic gates signal the approach of a train. Annually, approximately 250 people die in crashes with trains at active crossings. Another form of active protection is the use of highway traffic signals. Highway traffic signals have been used as a form of active rail-highway crossing control in several states. The Manual of Uniform Traffic Control Devices currently prohibits the use of highway traffic signals on mainline track crossings even though these devices are a well understood and common traffic control device at highway-highway intersections, particularly in urban environments where the majority of active crossings are to be found. The objective of this research was to determine the factors that contribute to fatal vehicle train crashes at rail-highway crossings equipped with either flashing light signals, flashing light signals with automatic gates, or highway traffic signals. Secondly, it attempted to determine whether the use of highway traffic signals at railhighway crossings offer any safety benefits over the use of conventional active traffic control devices. Fatal accident records obtained from the Fatal Accident Reporting System (FARS) were used in this analysis. The driver related factors coded by the police officers in FARS, at fatal active grade crossing locations, were predominantly driver error factors. Three contributing factors that were common to all active crossing fatalities were the involvement of young drivers (less than 30 years old), drunk drivers and the lack signals appeared to offer safety benefits over the other standard active devices with regards to the above three contributing factors, the apparent benefit may be due to the fact that highway traffic signals experience lower night time train volumes. The accuracy of the FARS database description of the traffic control device was also of concern, after a cross check with the DOT/AAR database was performed.

Frieslaar, Andre Henry

1997-01-01T23:59:59.000Z

354

Steam Quality  

E-Print Network (OSTI)

"STEAM QUALITY has been generally defined as the amount of moisture/vapor (or lack thereof) contained within steam produced from some form of boiler. It has long been used as the standard term for the measurement of ""wet or dry"" steam and as a means of measuring enthalpy. Totally dry steam is said to be ""saturated"" steam. It is sometimes defined as the ""dryness faction"". The term in its historical denotation refers to a physical attribute of the steam. That attribute being ""what is the percentage water vapor content of the steam"" as compared to the amount of steam. Dry saturated steam is steam which carries no water vapor with it and is defined as having a quality of 1.00 (100%). Since water vapor is always present at the interface between the water level and the steam in a boiler, some water vapor will always tend to pass through the system with the steam. Hence, a continuing problem. If steam does carry water vapor past the separators it will tend to coalesce as a liquid, and in doing so it also will carry boiler chemicals with it."

Johnston, W.

1989-09-01T23:59:59.000Z

355

NREL: Environment, Safety, Health and Quality - Quality  

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

expertise, and supporting infrastructure required to deliver quality research, products, services, and work processes by implementing our Quality Assurance Program. Using this...

356

Coating thermal noise of a finite-size cylindrical mirror  

E-Print Network (OSTI)

Thermal noise of a mirror is one of the limiting noise sources in the high precision measurement such as gravitational-wave detection, and the modeling of thermal noise has been developed and refined over a decade. In this paper, we present a derivation of coating thermal noise of a finite-size cylindrical mirror based on the fluctuation-dissipation theorem. The result agrees to a previous result with an infinite-size mirror in the limit of large thickness, and also agrees to an independent result based on the mode expansion with a thin-mirror approximation. Our study will play an important role not only to accurately estimate the thermal-noise level of gravitational-wave detectors but also to help analyzing thermal noise in quantum-measurement experiments with lighter mirrors.

Kentaro Somiya; Kazuhiro Yamamoto

2009-03-17T23:59:59.000Z

357

Impacts of Vessel Noise Perturbations on the Resident Sperm Whale Population in the Gulf of Mexico  

E-Print Network (OSTI)

The Gulf of Mexico is home to two of the world?s ten busiest ports by cargo volume, the Port of New Orleans and the Port of Houston; and in 2008, these ports hosted a combined 14,000 ships, a number which is likely only to increase. Past research shows that this increase in shipping worldwide has historically lead to an increase in ambient noise level of 3-5dB per decade. Sperm whales in the Gulf of Mexico are considered a genetically distinct, resident population. They have a preference for the Louisiana-Mississippi Shelf region which directly overlaps with the entrance to the Mississippi and the Port of New Orleans. Disruptions from vessel noise could influence feeding and breeding patterns essential to the health of the stock. Data used in this analysis were collected continuously over 36 days in the summer of 2001 from bottom moored Navy Environmental Acoustic Recording System (EARS) buoys. Results showed a significant difference (P<0.05) in noise level between hours with ships passing and hours without. Metrics for 56 ship passages were analyzed to compare duration of ship passage with duration of maximum received level (MRL) during ship passage. Results of that analysis showed an average ship passage of 29 minutes with average MRL lasting 23% of the ship passage and an average increase of 40dB. Lastly, click counts were made with the Pamguard. Click counts for ship passages were completed for 35 min and 17.5 min before and after the estimated closest point of approach (CPA) for each ship. Results showed a 36% decrease in the number of detectable clicks as a ship approaches when comparing clicks detected at intervals of both 35 minutes before and 17 minutes before the CPA; additionally, 22% fewer clicks were counted 30 min after the ship than 30 min before (results significant at the P=0.01 level). These results indicate a potential change in sperm whale behavior when exposed to large class size vessel traffic (e.g. tankers and container ships) from major shipping lanes. Recommendations for addressing this issue are discussed.

Azzara, Alyson

2012-05-01T23:59:59.000Z

358

Green Noise or Green Value? Measuring the Effects of Environmental...  

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

Plant EPIs Commercial Food Service About ENERGY STAR Partner Resources You are here Home Buildings & Plants Green Noise or Green Value? Measuring the Effects of...

359

Assessing the Impacts of Reduced Noise Operations of Wind Turbines...  

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

LBNL-3562E Assessing the Impacts of Reduced Noise Operations of Wind Turbines on Neighbor Annoyance: A Preliminary Analysis in Vinalhaven, Maine Ben Hoen, Haftan Eckholdt, and Ryan...

360

Pulsed X-Band PM/AM Noise Measurement Systems  

Science Conference Proceedings (OSTI)

... the NIST Phase Noise Group has developed a second generation dual-channel ... approach uses a calibrated amount of offset signal power that can ...

2010-10-05T23:59:59.000Z

Note: This page contains sample records for the topic "quality noise traffic" 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

Depth profiling ambient noise in the deep ocean  

E-Print Network (OSTI)

Acoustic Ambient Noise in the Ocean: Spectra and Sources,"and Osterhus, S. (1999). "Ocean Ambient Sound Instrumenta Subsurface Package," J. Atmos. Ocean. Tech. 16, 1118-1126.

Barclay, David Readshaw

2011-01-01T23:59:59.000Z

362

Enabling Green Energy and Propulsion Systems via Direct Noise...  

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

Umesh Paliath, GE Global Research; Joe Insley, Argonne National Laboratory Enabling Green Energy and Propulsion Systems via Direct Noise Computation PI Name: Umesh Paliath PI...

363

Enabling Green Energy and Propulsion Systems via Direct Noise...  

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

GE propulsion systems Enabling Green Energy and Propulsion Systems via Direct Noise Computation PI Name: Umesh Paliath PI Email: paliath@ge.com Institution: GE Global Research...

364

Noise control technology for generator sets in enclosures  

Science Conference Proceedings (OSTI)

The health and life of human beings are affected by loud noise ..... error acoustic path was presented, and a feedback loud- speaker was used not only as the ...

365

Cell Voltage Noise Reduction Based on Wavelet in Aluminum ...  

Science Conference Proceedings (OSTI)

Presentation Title, Cell Voltage Noise Reduction Based on Wavelet in Aluminum ... cell voltage signals collected in aluminium electrolysis process are with high ...

366

Some noise control problems peculiar to nuclear generating facilities  

Science Conference Proceedings (OSTI)

The ability to confidently predict the noise environment in a nuclear generating facility presently under construction is complicated by the design constraints of physical layout

Robert A. Putnam

1977-01-01T23:59:59.000Z

367

Spin Noise Exchange in Coupled Alkali-Metal Vapors  

E-Print Network (OSTI)

The physics of spin exchange collisions has fueled a large number of discoveries in fundamental physics, chemistry and biology, and has led to several applications in medical imaging and nuclear magnetic resonance. We here report on the experimental observation and theoretical justification of a novel effect, the transfer of spin noise from one atomic species to another, through the mechanism of spin exchange. Essentially, we extend the foundational studies of spin exchange into the deeper layer of quantum fluctuations. The signature of spin noise exchange is an increase of the total spin noise power at low magnetic fields where the two-species spin noise resonances overlap.

A. T. Dellis; M. Loulakis; I. K. Kominis

2013-07-09T23:59:59.000Z

368

Active control of fan noise and vortex shedding.  

E-Print Network (OSTI)

??[Truncated abstract] The subject of fan noise generating mechanisms and its control has been studied intensively over the past few decades as a result of… (more)

Wong, Yee-Jun

2004-01-01T23:59:59.000Z

369

High Tc SQUID Circuits Suppress Intrinsic Magnetic Field Noise  

John Clarke and colleagues at Berkeley Lab have eliminated excess low frequency noise in high-transition temperature (Tc) superconducting quantum ...

370

Management processes in U.S. air traffic management modernization : a study of global navigation satellite system development  

E-Print Network (OSTI)

This thesis investigates organization and management issues associated with the Federal Aviation Administration's (FAA) efforts to modernize the nation's Air Traffic Management (ATM) system. Focus is placed specifically ...

Sandvig, John H.

1994-01-01T23:59:59.000Z

371

Real-Time Traffic Information for Emergency Evacuation Operations: Phase A Final Report  

Science Conference Proceedings (OSTI)

There are many instances in which it is possible to plan ahead for an emergency evacuation (e.g., an explosion at a chemical processing facility). For those cases, if an accident (or an attack) were to happen, then the best evacuation plan for the prevailing network and weather conditions would be deployed. In other cases (e.g., the derailment of a train transporting hazardous materials), there may not be any previously developed plan to be implemented and decisions must be made ad-hoc on how to proceed with an emergency evacuation. In both situations, the availability of real-time traffic information plays a critical role in the management of the evacuation operations. To improve public safety during a vehicular emergency evacuation it is necessary to detect losses of road capacity (due to incidents, for example) as early as possible. Once these bottlenecks are identified, re-routing strategies must be determined in real-time and deployed in the field to help dissipate the congestion and increase the efficiency of the evacuation. Due to cost constraints, only large urban areas have traffic sensor deployments that permit access to some sort of real-time traffic information; any evacuation taking place in any other areas of the country would have to proceed without real-time traffic information. The latter was the focus of this SERRI/DHS (Southeast Region Research Initiative/Department of Homeland Security) sponsored project. That is, the main objective on the project was to improve the operations during a vehicular emergency evacuation anywhere by using newly developed real-time traffic-information-gathering technologies to assess traffic conditions and therefore to potentially detect incidents on the main evacuation routes. Phase A of the project consisted in the development and testing of a prototype system composed of sensors that are engineered in such a way that they can be rapidly deployed in the field where and when they are needed. Each one of these sensors is also equipped with their own power supply and a GPS (Global Positioning System) device to auto-determine its spatial location on the transportation network under surveillance. The system is capable of assessing traffic parameters by identifying and re-identifying vehicles in the traffic stream as those vehicles pass over the sensors. The system of sensors transmits, through wireless communication, real-time traffic information (travel time and other parameters) to a command and control center via an NTCIP (National Transportation Communication for ITS Protocol) -compatible interface. As an alternative, an existing NTCIP-compatible system accepts the real-time traffic information mentioned and broadcasts the traffic information to emergency managers, the media and the public via the existing channels. A series of tests, both in a controlled environment and on the field, were conducted to study the feasibility of rapidly deploying the system of traffic sensors and to assess its ability to provide real-time traffic information during an emergency evacuation. The results of these tests indicated that the prototype sensors are reliable and accurate for the type of application that is the focus of this project.

Franzese, Oscar [ORNL; Zhang, Li [Mississippi State University (MSU); Mahmoud, Anas M. [Mississippi State University (MSU); Lascurain, Mary Beth [ORNL; Wen, Yi [Mississippi State University (MSU)

2010-05-01T23:59:59.000Z

372

Processing data base information having nonwhite noise  

DOE Patents (OSTI)

A method and system for processing a set of data from an industrial process and/or a sensor. The method and system can include processing data from either real or calculated data related to an industrial process variable. One of the data sets can be an artificial signal data set generated by an autoregressive moving average technique. After obtaining two data sets associated with one physical variable, a difference function data set is obtained by determining the arithmetic difference between the two pairs of data sets over time. A frequency domain transformation is made of the difference function data set to obtain Fourier modes describing a composite function data set. A residual function data set is obtained by subtracting the composite function data set from the difference function data set and the residual function data set (free of nonwhite noise) is analyzed by a statistical probability ratio test to provide a validated data base.

Gross, Kenneth C. (Bolingbrook, IL); Morreale, Patricia (Park Ridge, IL)

1995-01-01T23:59:59.000Z

373

Probabilistic Noise Identification and Data Cleaning  

E-Print Network (OSTI)

Real world data is never as perfect as we would like it to be and can often suffer from corruptions that may impact interpretations of the data, models created from the data, and decisions made based on the data. One approach to this problem is to identify and remove records that contain corruptions. Unfortunately, if only certain fields in a record have been corrupted then usable, uncorrupted data will be lost. In this paper we present LENS, an approach for identifying corrupted fields and using the remaining noncorrupted fields for subsequent modeling and analysis. Our approach uses the data to learn a probabilistic model containing three components: a generative model of the clean records, a generative model of the noise values, and a probabilistic model of the corruption process. We provide an algorithm for the unsupervised discovery of such models and empirically evaluate both its performance at detecting corrupted fields and, as one example application, the resulting improvement this gives to a classifier.

Jeremy Kubica; Andrew Moore

2002-01-01T23:59:59.000Z

374

Fossil Biodiversity: Red Noise Plus Signal  

E-Print Network (OSTI)

We have examined the Fourier power spectrum as well as the Hurst exponent of extinction, origination, and total biodiversity in the marine fossil record, using a recently improved geologic timescale. We find all of them strongly inconsistent with past claims of self-similarity as well as inconsistent with random walk behavior. Instead, they are dominated by low-frequency power, with approximate f^-2 power over one decade in frequency. The spectrum turns over at about 10^8 y, lending plausibility to connections with galactic dynamics. Even in the background of this low-frequency dominance, a previously noted 62 My biodiversity cycle stands out with better than 99% confidence above the noise level, accounting for about 35% of the total variance in the fossil biodiversity record.

Adrian L. Melott; Bruce S. Lieberman

2006-06-13T23:59:59.000Z

375

Fossil Biodiversity: Red Noise Plus Signal  

E-Print Network (OSTI)

We have examined the Fourier power spectrum as well as the Hurst exponent of extinction, origination, and total biodiversity in the marine fossil record, using a recently improved geologic timescale. We find all of them strongly inconsistent with past claims of self-similarity as well as inconsistent with random walk behavior. Instead, they are dominated by low-frequency power, with approximate f^-2 power over one decade in frequency. The spectrum turns over at about 10^5 y, lending plausibility to connections with galactic dynamics. Even in the background of this low-frequency dominance, a previously noted 62 My biodiversity cycle stands out with better than 99% confidence above the noise level, accounting for about 35% of the total variance in the fossil biodiversity record.

Melott, A L; Melott, Adrian L.; Lieberman, Bruce S.

2006-01-01T23:59:59.000Z

376

Quantum noises and the large scale structure  

E-Print Network (OSTI)

We propose that cosmological density perturbation may originate from passive fluctuations of the inflaton, which are induced by colored quantum noise due to the coupling of the inflaton to the quantum environment. At small scales, the fluctuations grow with time to become nearly scale-invariant. However, the larger-scale modes cross out the horizon earlier and do not have enough time to grow, thus resulting in a suppression of the density perturbation. This may explain the observed low quadrupole in the CMB anisotropy data and and potentially unveil the initial time of inflation. We also discuss the implications to the running spectral index and the non-Gaussianity of the primordial density perturbation.

Wo-Lung Lee

2007-01-31T23:59:59.000Z

377

Noise in x-ray grating-based phase-contrast imaging  

Science Conference Proceedings (OSTI)

Purpose: Grating-based x-ray phase-contrast imaging is a fast developing new modality not only for medical imaging, but as well for other fields such as material sciences. While these many possible applications arise, the knowledge of the noise behavior is essential. Methods: In this work, the authors used a least squares fitting algorithm to calculate the noise behavior of the three quantities absorption, differential phase, and dark-field image. Further, the calculated error formula of the differential phase image was verified by measurements. Therefore, a Talbot interferometer was setup, using a microfocus x-ray tube as source and a Timepix detector for photon counting. Additionally, simulations regarding this topic were performed. Results: It turned out that the variance of the reconstructed phase is only dependent of the total number of photons used to generate the phase image and the visibility of the experimental setup. These results could be evaluated in measurements as well as in simulations. Furthermore, the correlation between absorption and dark-field image was calculated. Conclusions: These results provide the understanding of the noise characteristics of grating-based phase-contrast imaging and will help to improve image quality.

Weber, Thomas; Bartl, Peter; Bayer, Florian; Durst, Juergen; Haas, Wilhelm; Michel, Thilo; Ritter, Andre; Anton, Gisela [ECAP--Erlangen Centre for Astroparticle Physics, University of Erlangen-Nuremberg, Erwin-Rommel-Str. 1, 91058 Erlangen (Germany); Pattern Recognition Lab, University of Erlangen-Nuremberg, Martensstr. 3, 91058 Erlangen, Germany and ECAP--Erlangen Centre for Astroparticle Physics, University of Erlangen-Nuremberg, Erwin-Rommel-Str. 1, 91058 Erlangen (Germany); ECAP--Erlangen Centre for Astroparticle Physics, University of Erlangen-Nuremberg, Erwin-Rommel-Str. 1, 91058 Erlangen (Germany)

2011-07-15T23:59:59.000Z

378

Adaptive Distributed Traffic Control Service for DDoS Attack Mitigation  

E-Print Network (OSTI)

Frequency and intensity of Internet attacks are rising with an alarming pace. Several technologies and concepts were proposed for fighting distributed denial of service (DDoS) attacks: traceback, pushback, i3, SOS and Mayday. This paper shows that in the case of DDoS reflector attacks they are either ineffective or even counterproductive. We then propose a novel concept and system that extends the control over network traffic by network users to the Internet using adaptive traffic processing devices. We safely delegate partial network management capabilities from network operators to network users. All network packets with a source or destination address owned by a network user can now also be controlled within the Internet instead of only at the network user's Internet uplink. By limiting the traffic control features and by restricting the realm of control to the "owner" of the traffic, we can rule out misuse of this system. Applications of our system are manifold: prevention of source address spoofing, DDoS attack mitigation, distributed firewall-like filtering, new ways of collecting traffic statistics, traceback, distributed network debugging, support for forensic analyses and many more.

Thomas Dübendorfer; Matthias Bossardt; Bernhard Plattner

2005-01-01T23:59:59.000Z

379

Placement of Traffic Barriers on Roadside and Median Slopes  

E-Print Network (OSTI)

Cross median crashes have become a serious problem in recent years. Most of the median cross sections used for divided highways have terrains with steep slopes. Traffic barriers, frequently used on slopes, are generally designed based on the findings obtained from crash tests performed on flat terrain. For barriers placed on roadside and median slopes, vehicle impact height varies depending on the trajectory of the vehicle along the ditch section and lateral offset of the barrier. Thus depending on the placement location on a relatively steep slope, a barrier can be impacted by an errant vehicle at height and orientation more critical compared to those considered during its design. Hence, detailed study of performance of barriers on roadside and median slopes is needed to achieve acceptable safety performance. In this study, performances of modified G4(1S) W-beam, Midwest Guardrail System (MGS), modified Thrie-beam, modified weak post W-beam, and box-beam guardrail systems on sloped terrains are investigated using numerical simulations. A procedure is developed that provide guidance for their placement on roadside and median slopes. The research approach consists of nonlinear finite element analyses and multi-rigid-body dynamic analyses approach. Detailed finite element representation for each of the barriers is developed using LS-DYNA. Model fidelity is assessed through comparison of simulated and measured responses reported in full scale crash test studies conducted on flat terrain. LS-DYNA simulations of vehicle impacts on barriers placed on flat terrain at different impact heights are performed to identify performance limits of the barriers in terms of acceptable vehicle impact heights. The performances of the barriers are evaluated following the guidelines provided in NCHRP Report 350. Multi-rigid-body dynamic analysis code, CARSIM, is used to identify trajectories of the vehicles traversing various roadside and median cross-slopes. After analyzing vehicle trajectories and barrier performance limits, a guideline has been prepared with recommendations for the placement of barriers along roadside and median slopes. This guideline is then verified and refined using the responses obtained from full-scale LS-DYNA simulations. These simulations capture the full encroachment event from departure of the vehicle off the traveled way through impact with the barrier.

Ferdous, Md Rubiat

2011-05-01T23:59:59.000Z

380

Evaluation of using active circuitry for substrate noise suppression  

Science Conference Proceedings (OSTI)

The performance of system-on-chips can be severely degraded if noisy circuits interfere with sensitive circuits through the common silicon substrate. Many methods have been proposed to suppress such substrate noise, ranging from designing circuits that ... Keywords: active noise decoupling, substrate coupling, substrate modeling

Rashid Farivar; Simon Kristiansson; Fredrik Ingvarson; Kjell O. Jeppson

2007-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "quality noise traffic" 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

Modeling of combustion noise spectrum from turbulent premixed flames  

E-Print Network (OSTI)

Modeling of combustion noise spectrum from turbulent premixed flames Y. Liu, A. P. Dowling, T. D, Nantes, France 2321 #12;Turbulent combustion processes generate sound radiation due to temporal changes, this temporal correlation and its role in the modeling of combustion noise spectrum are studied by analyzing

Paris-Sud XI, Université de

382

Quantum Noise and Information in Quantum Search Algorithm  

Science Conference Proceedings (OSTI)

External influences in the form of quantum noise on Grover’s search algorithm are investigated. The study shows that the algorithm can be robust under such external dissipation. The effect of noise is described by a completely positive trace preserving map

D. Ellinas; Ch. Konstandakis

2004-01-01T23:59:59.000Z

383

Noise threshold: Merzbow and the end of natural sound  

Science Conference Proceedings (OSTI)

When we ask what noise is, we would do well to remember that no single definition can function timelessly - this may well be the case with many terms, but one of the arguments of this essay is that noise is that which always fails to come into definition. ...

Paul Hegarty

2001-12-01T23:59:59.000Z

384

Theory of Neutron Noise in a Temporally Fluctuating Multiplying Medium  

E-Print Network (OSTI)

Theory of Neutron Noise in a Temporally Fluctuating Multiplying Medium Lénárd Pál KFKI Atomic of Technology, Department of Nuclear Engineering SE-41296 Göteborg, Sweden Received January 18, 2006 Accepted) and those in a fluctuating medium (power reactor noise) have been traditionally considered as two separate

Pázsit, Imre

385

Noise modeling from high-permeability shields using Kirchhoff equations  

SciTech Connect

Progress in the development of high-sensitivity magnetic-field measurements has stimulated interest in understanding magnetic noise of conductive materials, especially of magnetic shields (DC or rf) based on high-permeability materials and/or high-conductivity materials. For example, SQUIDs and atomic magnetometers have been used in many experiments with mu-metal shields, and additionally SQUID systems frequently have rf shielding based on thin conductive materials. Typical existing approaches to modeling noise only work with simple shield and sensor geometries while common experimental setups today consist of multiple sensor systems arbitrary shapes and complex shield geometries. With complex sensor arrays used in, for example, MEG and Ultra Low Field MRI studies the knowledge of the noise correlation between sensors is as important as the knowledge of the noise itself. This is crucial for incorporating efficient noise cancelation schemes for the system. We developed an approach that allows us to calculate the Johnson noise for any geometrically shaped shield and multiple sensor systems. The approach uses a fraction of the processing power of other approaches and with a multiple sensor system our approach not only calculates the noise for each sensor but it also calculates the noise correlation matrix between sensors. Here we will show the algorithm and examples where it can be implemented.

Sandin, Henrik J [Los Alamos National Laboratory; Volegov, Petr L [Los Alamos National Laboratory; Espy, Michelle A [Los Alamos National Laboratory; Matlashov, Andrei N [Los Alamos National Laboratory; Savukov, Igor M [Los Alamos National Laboratory; Schultz, Larry J [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

386

Statement map: reducing web information credibility noise through opinion classification  

Science Conference Proceedings (OSTI)

On the Internet, users often encounter noise in the form of spelling errors or unknown words, however, dishonest, unreliable, or biased information also acts as noise that makes it difficult to find credible sources of information. As people come to ... Keywords: STATEMENT MAP, credibility analysis, discourse processing, opinion classification, semantic relation classification, structural alignment

Koji Murakami; Eric Nichols; Junta Mizuno; Yotaro Watanabe; Shouko Masuda; Hayato Goto; Megumi Ohki; Chitose Sao; Suguru Matsuyoshi; Kentaro Inui; Yuji Matsumoto

2010-10-01T23:59:59.000Z

387

Development of a 2-D 2-group neutron noise simulator  

E-Print Network (OSTI)

Development of a 2-D 2-group neutron noise simulator C. Demazie` re* Chalmers University of Technology, Department of Reactor Physics, SE-412 96 Go¨teborg, Sweden Received 10 May 2003; accepted 27 August 2003 Abstract In this paper, the development of a so-called neutron noise simulator is reported

Demazière, Christophe

388

Monitoring residential noise for prospective home owners and renters  

Science Conference Proceedings (OSTI)

Residential noise is a leading cause of neighborhood dissatisfaction but is difficult to quantify for it varies in intensity and spectra over time. We have developed a noise model and data representation techniques that prospective homeowners and renters ... Keywords: location-based services, mobile devices, sensors

Thomas Zimmerman; Christine Robson

2011-06-01T23:59:59.000Z

389

A Method for Noise Removal of LIDAR Point Clouds  

Science Conference Proceedings (OSTI)

LiDAR can quickly and accurately obtain precision and high-density surface elevation data. In cooperation with high-precision GPS positioning technology and IMU attitude sensor, a typical noise removal algorithm of LIDAR point clouds based on FEA is ... Keywords: LIDAR, point clouds, noise removal, FEA

Huang Zuowei, Huang Yuanjiang, Huang Jie

2013-01-01T23:59:59.000Z

390

U-091: cURL Lets Remote Users Decrypt SSL/TLS Traffic | Department of  

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

91: cURL Lets Remote Users Decrypt SSL/TLS Traffic 91: cURL Lets Remote Users Decrypt SSL/TLS Traffic U-091: cURL Lets Remote Users Decrypt SSL/TLS Traffic January 30, 2012 - 6:45am Addthis PROBLEM: A vulnerability was reported in cURL. PLATFORM: Linux (Any), UNIX (Any), Windows (Any) : Version(s): 7.10.6 through 7.23.1 ABSTRACT: A remote user can decrypt SSL/TLS sessions in certain cases. reference LINKS: CVE-2011-3389 SecurityTracker Alert ID: 1026587 Vendor Advisory IMPACT ASSESSMENT: Moderate Discussion: A remote user with the ability to conduct a man-in-the-middle attack can decrypt SSL/TLS sessions. The SSL protocol, as used in certain configurations in Microsoft Windows and Microsoft Internet Explorer, Mozilla Firefox, Google Chrome, Opera, and other products, encrypts data by using CBC mode with chained initialization vectors, which allows

391

Intra-cellular traffic: bio-molecular motors on filamentary tracks  

E-Print Network (OSTI)

Molecular motors are macromolecular complexes which use some form of input energy to perform mechanical work. The filamentary tracks, on which these motors move, are made of either proteins (e.g., microtubules) or nucleic acids (DNA or RNA). Often, many such motors move simultaneously on the same track and their collective properties have superficial similarities with vehicular traffic on highways. The models we have developed provide ``unified'' description: in the low-density limit, a model captures the transport properties of a single motor while, at higher densities the same model accounts for the collective spatio-temporal organization of interacting motors. By drawing analogy with vehicular traffic, we have introduced novel quantities for characterizing the nature of the spatio-temporal organization of molecular motors on their tracks. We show how the traffic-like intracellular collective phenomena depend on the mechano-chemistry of the corresponding individual motors.

Debashish Chowdhury; Aakash Basu; Ashok Garai; Philip Greulich; Katsuhiro Nishinari; Andreas Schadschneider; Tripti Tripathi

2008-01-15T23:59:59.000Z

392

High-speed and high-fidelity system and method for collecting network traffic  

DOE Patents (OSTI)

A system is provided for the high-speed and high-fidelity collection of network traffic. The system can collect traffic at gigabit-per-second (Gbps) speeds, scale to terabit-per-second (Tbps) speeds, and support additional functions such as real-time network intrusion detection. The present system uses a dedicated operating system for traffic collection to maximize efficiency, scalability, and performance. A scalable infrastructure and apparatus for the present system is provided by splitting the work performed on one host onto multiple hosts. The present system simultaneously addresses the issues of scalability, performance, cost, and adaptability with respect to network monitoring, collection, and other network tasks. In addition to high-speed and high-fidelity network collection, the present system provides a flexible infrastructure to perform virtually any function at high speeds such as real-time network intrusion detection and wide-area network emulation for research purposes.

Weigle, Eric H. (Los Alamos, NM)

2010-08-24T23:59:59.000Z

393

ARM - Data Quality Program  

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

Quality Program Quality Program DQ Resources Data Quality Assessment and Control Report (PDF, 747KB) Data Quality Office Data Quality Problem Reporting (DQPR) Contact Us Submit Data Quality Findings Randy Peppler, Data Quality Manager Ken Kehoe, Data Quality Specialist Justin Monroe, Data Quality Specialist Adam Theisen, Data Quality Specialist Sean Moore, Data Quality Consultant Instrument and Site Contacts Instrument Mentors AAF Contacts AMF Contacts NSA Site Contacts SGP Site Contacts TWP Site Contacts Data Quality Program Introduction One of the goals of the ARM Climate Research Facility is to provide datastreams of quality suitable for scientific research. Maintaining data quality for an organization program of the size and complexity of the ARM Facility is a significant challenge; efforts toward this end have matured

394

Further constraints on electron acceleration in solar noise storms  

E-Print Network (OSTI)

We reexamine the energetics of nonthermal electron acceleration in solar noise storms. A new result is obtained for the minimum nonthermal electron number density required to produce a Langmuir wave population of sufficient intensity to power the noise storm emission. We combine this constraint with the stochastic electron acceleration formalism developed by Subramanian & Becker (2005) to derive a rigorous estimate for the efficiency of the overall noise storm emission process, beginning with nonthermal electron acceleration and culminating in the observed radiation. We also calculate separate efficiencies for the electron acceleration -- Langmuir wave generation stage and the Langmuir wave -- noise storm production stage. In addition, we obtain a new theoretical estimate for the energy density of the Langmuir waves in noise storm continuum sources.

Prasad Subramanian; Peter A. Becker

2006-02-28T23:59:59.000Z

395

Wind noise suppression in cochlear implants with one and two microphones Student Investigator: Casey Cox  

E-Print Network (OSTI)

1 Wind noise suppression in cochlear implants with one and two microphones Student Investigator coding strategy used. However, performance deteriorates significantly in wind noise. Wind noise was to investigate how wind noise affects speech intelligibility in cochlear implant users. Default noise reduction

Peterson, Blake R.

396

Indirect Combustion Noise: Experimental Investigation of the Vortex Sound Generation in a Choked  

E-Print Network (OSTI)

Indirect Combustion Noise: Experimental Investigation of the Vortex Sound Generation in a Choked-27 April 2012, Nantes, France 2315 #12;Combustion noise in gas turbines consists of direct noise related to the unsteady combustion process itself and indirect noise. As known, indirect noise is produced when entropy

Paris-Sud XI, Université de

397

Sensing Applications of Fluctuations and Noise  

E-Print Network (OSTI)

Noise and time-dependent fluctuations are usually undesirable signals. However, they have many applications. This dissertation deals with two kinds of sensing applications of fluctuation and noise: soil bulk density assessment and bacterium sensing. The measurement of Vibration-Induced Conductivity Fluctuations (VICOF) provides information about the bulk density and other parameters of soils. Bulk density is the physical property of soils that is important to both the agriculture and construction industries. The traditional measurements of soil bulk density are often time-consuming, expensive or destructive. To determine the soil bulk density without the above drawbacks, the VICOF measurement scheme was proposed. The research of VICOF in this dissertation includes two parts: the initial phase of study and the new methods and their theory. In the initial phase of study, the simple experiments, theory, and simulations of VICOF were tested for relations between the soil bulk density, wetness, salinity, and the VICOF data. Then, new measurement arrangements and their theoretical models were proposed to improve the weaknesses of the initial approach (such as large scattering of data due to loose and heavy contacts) and to calculate the relationship between the measured signals and the electromechanical transport parameters of the soils. The bacterium sensing study in this dissertation was proposed to explore simple, practical, rapid, sensitive, specific, portable, and inexpensive ways to detect and recognize bacteria by Fluctuation-Enhanced Sensing (FES). One such potential way of bacterium sensing is to analyze their odor. The research of bacterium sensing also includes two parts: the initial phase of study and the new methods and their theory. The initial phase study was proposed to explore the possibility of detecting and identifying bacteria by sensing their odor via FES with commercial Taguchi sensors. Then the subsequently developed new methods and their theory provide a simple way to generate binary patterns with perfect reproducibility based on the spectral slopes in different frequency ranges at FES. This new type of signal processing and pattern recognition is implemented at the block diagram level using the building elements of analog circuitries and a few logic gates with total power consumption in the microWatts range.

Chang, Hung-Chih

2010-12-01T23:59:59.000Z

398

The effectiveness of jobs-housing balance as a strategy for reducing traffic congestion: a study of metropolitan Bangkok  

E-Print Network (OSTI)

Bangkok is widely known for its severe traffic congestion. The Thai government advocates the concept of jobs and housing balance (JHB) as a strategy for reducing traffic congestion in Metropolitan Bangkok. The basic idea is to decentralize the jobs to the neighboring provinces so that the commuters would live closer to their workplaces and thereby alleviate traffic congestion. The main purpose of this research is to examine empirically the effectiveness of JHB in reducing the severity of traffic congestion in the Bangkok Metropolitan Region. For this purpose, three data sets derived from the Bangkok Metropolitan Region Extended City Model (BMR-ECM) were obtained from the Office of the Commission for the Management of Land Traffic and the National Statistical Office of Thailand. Travel time index (TTI) was developed to measure congestion. In addition to JHB, a number of land use variables were included in the analysis. They are population density, school density, and job accessibility index. Multiple regression models of TTI as functions of JHB and other variables were estimated at two geographic scales: subsector and traffic analysis zone (TAZ). The study finds JHB is significant in influencing congestion levels in the Bangkok Metropolitan Region. Other influential factors include the population density, school density, and job accessibility. All of these factors are found to be statistically significant in explaining the variation of traffic congestion at the traffic analysis zone level, but not at the subsector level, however.

Lobyaem, Sonchai

2006-08-01T23:59:59.000Z

399

Summer Transportation Institute Learn what it takes to make traffic flow in a safe and effective way.  

E-Print Network (OSTI)

Summer Transportation Institute Learn what it takes to make traffic flow in a safe and effective how traffic engineers plan and maintain our systems of transportation around the state. · tour engineers from around the state learn what engineers do to make our transportation system work effectively

400

The Entropy Solutions for the Lighthill-Whitham-Richards Traffic Flow Model with a Discontinuous Flow-Density Relationship  

Science Conference Proceedings (OSTI)

In this paper we explicitly construct the entropy solutions for the Lighthill-Whitham-Richards (LWR) traffic flow model with a flow-density relationship which is piecewise quadratic, concave, but not continuous at the junction points where two quadratic ... Keywords: LWR model, WENO scheme, discontinuous flow-density relationship, entropy solution, traffic flow

Yadong Lu; S. C. Wong; Mengping Zhang; Chi-Wang Shu

2009-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "quality noise traffic" 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

Traffic scheduling mechanism based on graph theory for Power Saving mode of IEEE 802.11 distributed coordinator function  

Science Conference Proceedings (OSTI)

In IEEE 802.11 Power Saving (PS) mode specified for Independent Basic Service Set (IBSS), mobile stations announce their pending data packets within Announcement Traffic Indication Message (ATIM) window immediately after the reception ... Keywords: IEEE 80211, MAC protocol, ad hoc networks, distributed coordinator, energy efficiency, graph theory, medium access control, power saving, power-efficient, time synchronisation function, traffic scheduling

M. H. Ye; C. T. Lau; A. B. Premkumar

2009-03-01T23:59:59.000Z

402

LED Traffic Light as a Communications Device Grantham Pang, Thomas Kwan, Chi-Ho Chan, Hugh Liu.  

E-Print Network (OSTI)

:http://www.eee.hku.hk/~gpang Abstract The visible light from an LED (light emitting diode) traffic light can be modulated and encoded on the description of an audio information system made up of high brightness, visible light emitting diodes (LEDs messages 1. Introduction Recently, high intensity light emitting diodes for traffic signals are available

Pang, Grantham

403

Quantum Noise as an Entanglement Meter  

E-Print Network (OSTI)

Entanglement entropy, which is a measure of quantum correlations between separate parts of a many-body system, has emerged recently as a fundamental quantity in broad areas of theoretical physics, from cosmology and field theory to condensed matter theory and quantum information. The universal appeal of the entanglement entropy concept is related, in part, to the fact that it is defined solely in terms of the many-body density matrix of the system, with no relation to any particular observables. However, for the same reason, it has not been clear how to access this quantity experimentally. Here we derive a universal relation between entanglement entropy and the fluctuations of current flowing through a quantum point contact (QPC) which opens a way to perform a direct measurement of entanglement entropy. In particular, by utilizing space-time duality of 1d systems, we relate electric noise generated by opening and closing the QPC periodically in time with the seminal S = 1/3 log L prediction of conformal field theory.

Israel Klich; Leonid Levitov

2008-04-08T23:59:59.000Z

404

A low noise charge ramp electrometer  

DOE Patents (OSTI)

This invention depicts a electrometer capable of measuring small currents without the use of a feedback resistor which tends to contribute a large noise factor to the measured data. The electrometer eliminates the feedback resistor through the use of a feedback capacitor located across the electrometer amplifier. The signal from the electrometer amplifier is transferred to a electrometer buffer amplifier which serves to transfer the signal to several receptors. If the electrometer amplifier is approaching saturation, the buffer amplifier signals a reset discriminator which energizes a coil whose magnetic field closes a magnetic relay switch which in turn resets or zeros the feedback capacitor. In turn, a reset complete discriminator restarts the measurement process when the electrometer amplifier approaches its initial condition. The buffer amplifier also transmits the voltage signal from the electrometer amplifier to a voltage-to-frequency converter. The signals from the voltage-to-frequency converter are counted over a fixed period of time and the information is relayed to a data processor. The timing and sequencing of the small current measuring system is under the control of a sequence control logic unit.

Morgan, J.P.; Piper, T.C.

1991-12-31T23:59:59.000Z

405

The world of quantum noise and the fundamental output process  

E-Print Network (OSTI)

A stationary theory of quantum stochastic processes of second order is outlined. It includes KMS processes in wide sense like the equilibrium finite temperature quantum noise given by the Planck's spectral formula. It is shown that for each stationary noise there exists a natural output process output process which is identical to the noise in the infinite temperature limit, and flipping with the noise if the time is reversed at finite temperature. A canonical Hilbert space representation of the quantum noise and the fundamental output process is established and a decomposition of their spectra is found. A brief explanation of quantum stochastic integration with respect to the input-output processes is given using only correlation functions. This provides a mathematical foundation for linear stationary filtering transformations of quantum stochastic processes. It is proved that the colored quantum stationary noise and its time-reversed version can be obtained in the second order theory by a linear nonadapted filtering of the standard vacuum noise uniquely defined by the canonical creation and annihilation operators on the spectrum of the input-output pair.

V. P. Belavkin; O. Hirota; R. Hudson

2005-10-04T23:59:59.000Z

406

Quality Reference Samples  

Science Conference Proceedings (OSTI)

Peer-reviewed fats and oils related performance-based control samples for lab quality assurance and quality control. Quality Reference Samples Certified Reference Materials (CRM) aocs certified Certified Reference Materials chemists CRM fat fats lab labo

407

Aviation environmental policy effects on national- and regional-scale air quality, noise, and climate impacts  

E-Print Network (OSTI)

The continued growth of the aviation industry poses a challenge to policy-makers and industry stakeholders as each decision represents a trade-off on efficiency, equity, and environmental impact. The Aviation environmental ...

Wolfe, Philip J. (Philip James)

2012-01-01T23:59:59.000Z

408

Adaptive discrete cosine transform for feedback active noise control  

Science Conference Proceedings (OSTI)

The theory and performance of adaptive discrete cosine transform filters for feedback active noise control (ANC) is examined. The discrete cosine transform filter is a realization of an FIR filter as the cascade of an all-zero FIR filter with a bank ... Keywords: FIR filter, IIR digital resonators bank, active noise control, adaptive discrete cosine transform filters, adaptive filter, all-zero FIR filter, discrete cosine transform filter, feedback active noise control, filter-X LMS implementation, frequency, magnitude coefficient, phase coefficient, single error microphone, single loudspeaker, transfer function

G. Coutu; M. Dignan

1995-10-01T23:59:59.000Z

409

Quantum noise eater for a single photonic qubit  

E-Print Network (OSTI)

We propose a quantum noise eater for a single qubit and experimentally verify its performance for recovery of a superposition carried by a dual-rail photonic qubit. We consider a case when only one of the rails (e.g., one of interferometric arms) is vulnerable to noise. A coherent but randomly arriving photon penetrating into this single rail causes a change of its state, which results in an error in a subsequent quantum information processing. We theoretically prove and experimentally demonstrate a conditional full recovery of the superposition by this quantum noise eater.

Miroslav Gavenda; Lucie ?elechovská; Miloslav Dušek; Radim Filip

2013-08-04T23:59:59.000Z

410

Experiences in deploying a wireless mesh network testbed for traffic control  

Science Conference Proceedings (OSTI)

Wireless mesh networks (WMN) have attracted considerable interest in recent years as a convenient, flexible and low-cost alternative to wired communication infrastructures in many contexts. However, the great majority of research on metropolitan-scale ... Keywords: deployment, traffic control, wireless mesh network

Kun-chan Lan; Zhe Wang; Mahbub Hassan; Tim Moors; Rodney Berriman; Lavy Libman; Maximilian Ott; Bjorn Landfeldt; Zainab Zaidi

2007-10-01T23:59:59.000Z

411

Applications of GridProbe Technology for Traffic Monitoring on High-Capacity Backbone Networks  

E-Print Network (OSTI)

Applications of GridProbe Technology for Traffic Monitoring on High-Capacity Backbone Networks Data for the UKLIGHT international high capacity experimental network. The proposed system will record data flow projects in the e-science framework to enable data collection on core activities on such high speed

Haddadi, Hamed

412

Virtual Queue Based Distributed Data Traffic Scheduling for Cyber Physical Systems with Application in Smart Grid  

Science Conference Proceedings (OSTI)

Communication is needed in cyber physical system (CPS) to convey information from sensors to controllers. In this paper, a wireless network is considered to serve as the communication infrastructure in CPS. The data traffic scheduling problem is studied ... Keywords: Kalman filtering, cyber physical system, scheduling

Husheng Li

2012-06-01T23:59:59.000Z

413

A first look at cellular machine-to-machine traffic: large scale measurement and characterization  

Science Conference Proceedings (OSTI)

Cellular network based Machine-to-Machine (M2M) communication is fast becoming a market-changing force for a wide spectrum of businesses and applications such as telematics, smart metering, point-of-sale terminals, and home security and automation systems. ... Keywords: cellular network, machine-to-machine traffic

Muhammad Zubair Shafiq; Lusheng Ji; Alex X. Liu; Jeffrey Pang; Jia Wang

2012-06-01T23:59:59.000Z

414

Pareto-improving and revenue-neutral congestion pricing schemes in two-mode traffic networks  

Science Conference Proceedings (OSTI)

This paper studies a Pareto-improving and revenue-neutral congestion pricing scheme on a simple two-mode (highway and transit) network: this scheme aims at simultaneously improving system performance, making every individual user better off, and having ... Keywords: Congestion pricing, Pareto-improving, Revenue-neutral, Traffic equilibrium, Two-mode network

Yang Liu; Xiaolei Guo; Hai Yang

2009-04-01T23:59:59.000Z

415

The smart tachograph – individual accounting of traffic costs and its implications  

Science Conference Proceedings (OSTI)

Today, several costs caused by road traffic may either be only roughly approximated, or cannot be clearly assigned to the drivers causing them, or both. They are typically distributed evenly among a large fraction of drivers, which is both unfair and ...

Vlad Coroama

2006-05-01T23:59:59.000Z

416

A unified framework for multipath routing for unicast and multicast traffic  

Science Conference Proceedings (OSTI)

We study the problem of load balancing the traffic from a set of unicast and multicast sessions. The problem is formulated as an optimization problem. However, we assume that the gradient of the network cost function is not available and needs to be ... Keywords: mathematical programming/optimization, multipath routing, network measurements

Tuna Güven; Richard J. La; Mark A. Shayman; Bobby Bhattacharjee

2008-10-01T23:59:59.000Z

417

HEAF: a novel estimator for long-range dependent self-similar network traffic  

Science Conference Proceedings (OSTI)

Long-range dependent (LRD) self-similar chaotic behaviour has been found to be present in internet traffic by many researchers. The ‘Hurst exponent', H, is used as a measure of the degree of long-range dependence. A variety of techniques exist ...

Karim Mohammed Rezaul; Algirdas Pakstas; R. Gilchrist; Thomas M. Chen

2006-05-01T23:59:59.000Z

418

Bigazzi, Figliozzi, and Clifton 1 Motorists' Exposure to Traffic-Related Air Pollution:1  

E-Print Network (OSTI)

, "A micro-scale dispersion model for motor vehicle exhaust gas in urban3 areas--OMG volume. Yoshikawa, and T. Morikawa, "A wind-tunnel study on8 exhaust-gas dispersion from road vehicles­Part II studied). Traffic-induced dispersion increases with higher flows ­ slightly offsetting the9 increased

Bertini, Robert L.

419

Performance Evaluation of Adaptive Ramp-Metering Algorithms Using Microscopic Traffic Simulation Model  

E-Print Network (OSTI)

Performance Evaluation of Adaptive Ramp-Metering Algorithms Using Microscopic Traffic Simulation metering has undergone significant theoretical developments in recent years. However, the applicability been used in an evaluation study of three well-known adaptive ramp-metering algorithms: ALINEA, BOTTLE

Levinson, David M.

420

Joint Metering and Conflict Resolution in Air Traffic Control Jerome Le Ny  

E-Print Network (OSTI)

Joint Metering and Conflict Resolution in Air Traffic Control Jerome Le Ny and George J. Pappas programming. A key feature of this approach is its ability to also take into account various metering and metering in order to support this task. This paper addresses this problem by presenting a trajectory

Plotkin, Joshua B.

Note: This page contains sample records for the topic "quality noise traffic" 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

ASR: anonymous and secure reporting of traffic forwarding activity in mobile ad hoc networks  

Science Conference Proceedings (OSTI)

Nodes forward data on behalf of each other in mobile ad hoc networks. In a civilian application, nodes are assumed to be selfish and rational, i.e., they pursue their own self-interest. Hence, the ability to accurately measure traffic forwarding is critical ... Keywords: Anonymity, MANET, Monitoring, Packet forwarding, Secure link layer acknowledgment, Secure reporting protocol, Security

Heesook Choi; William Enck; Jaesheung Shin; Patrick D. Mcdaniel; Thomas F. Porta

2009-05-01T23:59:59.000Z

422

MEASURING THE IMPACT OF ADDITIONAL RAIL TRAFFIC USING HIGHWAY & RAILROAD METRICS  

E-Print Network (OSTI)

are then illustrated by simulating shared corridor operations with freight and passenger trains. TRANSPORTATION METRICS1 MEASURING THE IMPACT OF ADDITIONAL RAIL TRAFFIC USING HIGHWAY & RAILROAD METRICS Samuel L. Sogin of Illinois Urbana, IL, USA ABSTRACT Long term demand for freight movements in North America is expected

Barkan, Christopher P.L.

423

A review of the applications of agent technology in traffic and transportation systems  

Science Conference Proceedings (OSTI)

The agent computing paradigm is rapidly emerging as one of the powerful technologies for the development of largescale distributed systems to deal with the uncertainty in a dynamic environment. The domain of traffic and transportation systems is well ... Keywords: agents, intelligent transportation systems (ITS), mobile agent systems, multiagent systems (MAS)

Bo Chen; Harry H. Cheng

2010-06-01T23:59:59.000Z

424

Oblivious routing for fat-tree based system area networks with uncertain traffic demands  

Science Conference Proceedings (OSTI)

Fat-tree based system area networks have been widely adopted in high performance computing clusters. In such systems, the routing is often deterministic and the traffic demand is usually uncertain and changing. In this paper, we study routing performance ... Keywords: fat-tree, oblivious routing, system area networks

Xin Yuan; Wickus Nienaber; Zhenhai Duan; Rami Melhem

2007-06-01T23:59:59.000Z

425

Colour vision model-based approach for segmentation of traffic signs  

Science Conference Proceedings (OSTI)

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

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

2008-01-01T23:59:59.000Z

426

Post-construction evaluation of traffic forecast accuracy Pavithra Parthasarathi , David Levinson  

E-Print Network (OSTI)

Post-construction evaluation of traffic forecast accuracy Pavithra Parthasarathi Ã?, David Levinson: Transportation demand forecasting Project evaluation Forecast accuracy Model evaluation a b s t r a c t This research evaluates the accuracy of demand forecasts using a sample of recently-completed projects

Levinson, David M.

427

Modeling Heavy-tails in Traffic Sources for Network Performance Evaluation  

E-Print Network (OSTI)

1 Modeling Heavy-tails in Traffic Sources for Network Performance Evaluation Vaidyanathan Ramaswami, Kaustubh Jain, Rittwik Jana, Vaneet Aggarwal Abstract--Heavy tails in work loads (file sizes, flow lengths heavy tailed random variables. The fits obtained are validated using separate training and test data

Greenberg, Albert

428

Traffic Congestion Mitigation as an Emissions Reduction Strategy Alexander York Bigazzi  

E-Print Network (OSTI)

, such as electric and gas- electric hybrid vehicles. But travel volume is also a key consideration for the total hydrocarbons and particulate matter), and decreases with the fraction of advanced-drivetrain vehicles assume that traffic congestion mitigation results in reduced vehicle emissions without proper

Bertini, Robert L.

429

Supporting bursty traffic in wireless sensor networks through a distributed advertisement-based TDMA protocol (ATMA)  

Science Conference Proceedings (OSTI)

Nodes in wireless sensor networks (WSNs) are battery powered and oftentimes deployed in remote and hostile locations. Energy conservation is, therefore, one of the primary goals of MAC protocols designed for these networks. Contention-based protocols ... Keywords: Bursty traffic, Data advertisements, Hybrid, MAC protocol, TDMA, WSN

Surjya Ray; Ilker Demirkol; Wendi Heinzelman

2013-05-01T23:59:59.000Z

430

An integrated mobility and traffic model for resource allocation in wireless networks  

Science Conference Proceedings (OSTI)

In a wireless communications network, the movement of mobile users presents significant technical challenges to providing efficient access to the wired broadband network. In this paper, we construct a new analytical/numerical model that characterizes ... Keywords: admission control, mobility, resource allocation, traffic modeling, wireless networks

Hisashi Kobayashi; Shun-Zheng Yu; Brian L. Mark

2000-08-01T23:59:59.000Z

431

Measurement, Analysis and Modeling of real-time Source Data traffic in Factory Communication Systems  

E-Print Network (OSTI)

In the performance evaluation and design of communication systems for distributed automation systems the almost realistic modeling of the data traffic of automation devices plays a decisive part. Therefore the real-time communication behaviour of a high-grade automated installation in the discrete manufacturing is evaluated. Selected communication requirements are analysed and transferred to a analytic model. This model finally is validated.

Juergen Jasperneite; Peter Neumann

2000-01-01T23:59:59.000Z

432

CrashHelp: An Innovation to Improve Traffic Crash Emergency Medical  

E-Print Network (OSTI)

CrashHelp: An Innovation to Improve Traffic Crash Emergency Medical Response! Thomas Horan, Ph, and visualize information? !What existing and emerging technologies could be applied? !What are the best's" of transportation safety (USDOT, 2006) !Education, Engineering, Enforcement, Emergency medical services (EMS) "EMS

Minnesota, University of

433

Environmental Quality: Air (Louisiana)  

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

The Department of Environmental Quality regulates air quality in Louisiana. The Department has an established a fee system for funding the monitoring, investigation and other activities required...

434

DOE Federal Quality Council  

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

Assurance Office of Nuclear Safety Home Office of Quality Assurance Home Policy and Directives Software Quality Assurance SQA Home Central Registry Safety Software...

435

Numerical Investigation of Flow Induced Noise in a Simplified HVAC Duct with OpenFOAM.  

E-Print Network (OSTI)

?? Due to the growing demand for comfort, the noise generated by HVAC components should be considered by the designers. Flow induced noise is one… (more)

Wang, Cong

2013-01-01T23:59:59.000Z

436

Feedback Applications in Active Noise Control for Small Axial Cooling Fans.  

E-Print Network (OSTI)

??Feedback active noise control (ANC) has been applied as a means of attenuating broadband noise from a small axial cooling fan. Such fans are used… (more)

Green, Matthew J 1978-

2006-01-01T23:59:59.000Z

437

Active Noise Control of a Centrifugal Fan Mounted in a Mock Laptop Enclosure.  

E-Print Network (OSTI)

??Noise from information technology (IT) equipment is a significant problem in today's modern society. Active Noise Control (ANC) has shown promise in reducing the effect… (more)

Esplin, John J.

2012-01-01T23:59:59.000Z

438

Active Noise Control of an Insulated Box Fan using Feedforward and Feedback Control.  

E-Print Network (OSTI)

??In recent years, the active noise control methods are more attractive in reducing unwanted noise. Salient features of active control methods over passive control methods… (more)

Murthy, Muddala

2010-01-01T23:59:59.000Z

439

Transducer Signal Noise Analysis for Sensor Authentication  

SciTech Connect

The abstract is being passed through STIMS for submision to the conference. International safeguards organizations charged with promoting the peaceful use of nuclear energy employ unattended and remote monitoring systems supplemented with onsite inspections to ensure nuclear materials are not diverted for weaponization purposes. These systems are left unattended for periods of several months between inspections. During these periods physical security means are the main deterrent used to detect intentional monitoring system tampering. The information gathering components are locked in secure and sealed rooms. The sensor components (i.e. neutron and gamma detectors) are located throughout the plant in unsecure areas where sensor tampering could take place during the periods between inspections. Sensor tampering could allow the diversion of nuclear materials from the accepted and intended use to uses not consistent with the peaceful use of nuclear energy. A method and an apparatus is presented that address the detection of sensor tampering during the periods between inspections. It was developed at the Idaho National Laboratory (INL) for the Department of Energy (DOE) in support of the IAEA. The method is based on the detailed analysis of the sensor noise floor after the sensor signal is removed. The apparatus consists of a 2.1” x 2.6” electronic circuit board containing all signal conditioning and processing components and a laptop computer running an application that acquires and stores the analysis results between inspection periods. The sensors do not require any modification and are remotely located in their normal high radiation zones. The apparatus interfaces with the sensor signal conductors using a simple pass through connector at the normal sensor electronics interface package located in the already secure and sealed rooms. The apparatus does not require hardening against the effects of radiation due to its location. Presented is the apparatus design, the analysis method, and the test results as applied to tamper detection using three HE3 neutron sensors and two gamma sensors designed and built for safeguards monitoring.

John M. Svoboda (043887); Mark J. Schanfein

2012-07-01T23:59:59.000Z

440

Data Quality of Quality Measurement Experiments  

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

Data Quality of Quality Measurement Experiments Data Quality of Quality Measurement Experiments S. Bottone and S. Moore Mission Research Corporation Santa Barbara, California Introduction Quality Measurement Experiments (QME) are a special class of Value-Added Products (VAP). QMEs add value to Atmospheric Radiation Measurement (ARM) Program datastreams by providing for continuous assessment of the quality of incoming data based on internal consistency checks, comparisons between independent similar measurements, or comparisons between measurements and modeled results. Like any datastream, QME datastreams need to be checked for data quality. For each QME, we analyze a representative sample of files from the ARM data archive to determine 'typical' values of the QME variables. We then design outlier tests, specific to each variable, to be applied to

Note: This page contains sample records for the topic "quality noise traffic" 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

Air traffic control communication at Detroit Metro Wayne County Airport August 17, 1987  

E-Print Network (OSTI)

This report contains a transcript of radio communications between air traffic controllers and pilots. The transcript was prepared as part of the ATC Interaction Research Project (AIR Project) at the Oregon Graduate Institute, which has been investigating computational representations of air traffic control (ATC) communication. The transcript was made from a tape prepared and narrated by Lawrence L. Porter, a consultant in the field of air traffic control and aircraft accidents. It follows Northwest Airlines Flight 255 as it landed and took off from Detroit Metro Wayne County Airport on August 17, 1987, showing the pilot's interaction with each of the controller positions (Arrival Radar, Local Control, Ground Control, and Clearance Delivery). A copy of this recording on cassette may be obtained by writing to the Department of Computer Science and Engineering of the Oregon Graduate Institute. The authors thank Mr. Porter for providing the recording and narration. The transcript is in two parts. The section entitled "Full Transcript" depicts all exchanges chronologically as they occurred. However, air traffic control dialogue can be viewed as many interleaved yet fairly independent conversations, so in the "Separated Transcripts" section utterances are grouped by aircraft to show the course of each individual conversation. The utterance numbers from the full transcript are preserved in the separated transcripts so that the utterance context may be located easily. The notation and transcription conventions used in these transcripts are described in Appendix A. Appendix B contains charts describing the airspace around Detroit Metro Wayne County Airport.. The utterances in this transcript contain specialized terms and usages specific to the Air Traffic Control (ATC) domain. B...

Karen Ward; David Novick; Carolyn Sousa

1990-01-01T23:59:59.000Z

442

Additive Noise for Storm-Scale Ensemble Data Assimilation  

Science Conference Proceedings (OSTI)

An “additive noise” method for initializing ensemble forecasts of convective storms and maintaining ensemble spread during data assimilation is developed and tested for a simplified numerical cloud model (no radiation, terrain, or surface fluxes) ...

David C. Dowell; Louis J. Wicker

2009-05-01T23:59:59.000Z

443

Ambient addition : how to turn urban noise into music  

E-Print Network (OSTI)

As human civilization devises ever more powerful machines, living among them may become more difficult. We may find ourselves surrounded by incidentally created sounds and noises which are out of synchronization with our ...

Vawter, Noah (Noah Theodore)

2006-01-01T23:59:59.000Z

444

Structural thermal noise in gram-scale mirror oscillators  

E-Print Network (OSTI)

The thermal noise associated with mechanical dissipation is a ubiquitous limitation to the sensitivity of precision experiments ranging from frequency stabilization to gravitational wave interferometry. We report on the ...

Neben, Abraham Richard

445

The reduction of supersonic jet noise using pulsed microjet injection  

E-Print Network (OSTI)

This thesis is concerned with the active control of supersonic jet noise using pulsed microjet injection at the nozzle exit. Experimental investigations were carried out using this control method on an ideally expanded ...

Ragaller, Paul Aaron

2007-01-01T23:59:59.000Z

446

Hybrid wing-body aircraft noise and performance assessment  

E-Print Network (OSTI)

Hybrid wing-body aircraft noise generation and boundary layer ingestion (BLI) performance trends with increased fan face Mach number inlet designs are investigated. The presented topics are in support of the NASA subsonic ...

Weed, Philip Andrew

2010-01-01T23:59:59.000Z

447

A Novel Low Noise Regenerative Divide-by-Four Circuit  

Science Conference Proceedings (OSTI)

... of a chip inductor of 10 nH in series with a chip capacitor of about 40 ... MHz quartz oscillator that was multiplied up to 400 MHz using ultra-low- noise ...

2002-10-15T23:59:59.000Z

448

Evolutionary Multi-objective Ranking with Uncertainty and Noise  

Science Conference Proceedings (OSTI)

Real engineering optimisation problems are often subject to parameters whose values are uncertain or have noisy objective functions. Techniques such as adding small amounts of noise in order to identify robust solutions are also used. The process used ...

Evan Hughes

2001-03-01T23:59:59.000Z

449

Noise robust speech recognition applied to voice-driven wheelchair  

Science Conference Proceedings (OSTI)

Conventional voice-driven wheelchairs usually employ headset microphones that are capable of achieving sufficient recognition accuracy, even in the presence of surrounding noise. However, such interfaces require users to wear sensors such as a headset ...

Akira Sasou; Hiroaki Kojima

2009-01-01T23:59:59.000Z

450

Classroom auralizations using both speech and intruding noise  

Science Conference Proceedings (OSTI)

Continuing work with computer auralizations for education spaces—Can realistic speech auralizations be obtained for classrooms and similar spaces with disturbing ambient noise as produced by HVAC systems

2005-01-01T23:59:59.000Z

451

Ambient noise levels and reverberation times in Mississippi school rooms  

Science Conference Proceedings (OSTI)

Nine elementary school classrooms at three Mississippi public schools were selected at random for noise and reverberation time measures to monitor voluntary compliance with ANSI standard S12.60-2002 (Acoustical Performance Criteria

Edward L. Goshorn; Brett E. Kemker

2012-01-01T23:59:59.000Z

452

Construction noise prediction and barrier optimization using special purpose simulation  

Science Conference Proceedings (OSTI)

Construction projects produce serious environmental pollution and great annoyance to the neighbouring community due to construction noise. This paper presents an application of the special purpose simulation (SPS) language using Simphony software to ...

Anupama Gannoruwa; Janaka Y. Ruwanpura

2007-12-01T23:59:59.000Z

453

RADIAL-BASED NOISE POWER ESTIMATION FOR WEATHER RADARS  

Science Conference Proceedings (OSTI)

A radar antenna intercepts thermal radiation from various sources including the ground, the sun, the sky, precipitation and man-made radiators. In the radar receiver, this external radiation produces noise that constructively adds to the receiver ...

Igor R. Ivi?; Christopher Curtis; Sebastián M. Torres

454

Impedance Noise Identification for State-of-Health Prognostics  

DOE Green Energy (OSTI)

Impedance Noise Identification is an in-situ method of measuring battery impedance as a function of frequency using a random small signal noise excitation source. Through a series of auto- and cross-correlations and Fast Fourier Transforms, the battery complex impedance as a function of frequency can be determined. The results are similar to those measured under a lab-scale electrochemical impedance spectroscopy measurement. The lab-scale measurements have been shown to correlate well with resistance and power data that are typically used to ascertain the remaining life of a battery. To this end, the Impedance Noise Identification system is designed to acquire the same type of data as an on-board tool. A prototype system is now under development, and results are being compared to standardized measurement techniques such as electrochemical impedance spectroscopy. A brief description of the Impedance Noise Identification hardware system and representative test results are presented.

Jon P. Christophersen; Chester G. Motloch; John L. Morrison; Ian B. Donnellan; William H. Morrison

2008-07-01T23:59:59.000Z

455

The cost of noise reduction in commercial tilt rotor aircraft  

E-Print Network (OSTI)

The relationship between direct operating cost and departure noise annoyance was developed for commercial tilt rotor aircraft. This was accomplished by generating a series of tilt rotor aircraft designs to meet various ...

Faulkner, Henry B.

1974-01-01T23:59:59.000Z

456

Noise-optimal capture for high dynamic range photography  

E-Print Network (OSTI)

Taking multiple exposures is a well-established approach both for capturing high dynamic range (HDR) scenes and for noise reduction. But what is the optimal set of photos to capture? The typical approach to HDR capture ...

Hasinoff, Samuel William

457

Phasor representation for narrowband active noise control systems  

Science Conference Proceedings (OSTI)

The phasor representation is introduced to identify the characteristic of the active noise control (ANC) systems. The conventional representation, transfer function, cannot explain the fact that the performance will be degraded at some frequency for ...

Fu-Kun Chen; Ding-Horng Chen; Yue-Dar Jou

2008-01-01T23:59:59.000Z

458

Shipping source level estimation for ambient noise forecasting  

Science Conference Proceedings (OSTI)

The ability to accurately estimate shipping source levels from ambient noise data is an essential step towards creating a forecast model of the ocean soundscape. Source level estimates can be obtained by solving the system of linear equations

Jeffrey S. Rogers; Steven L. Means; Stephen C. Wales

2012-01-01T23:59:59.000Z

459

Noise reduction efforts for the ALS infrared beamlines  

E-Print Network (OSTI)

is being commissioned at the ALS that should help quietalso has links to the main ALS Infrared Website, where PDF’sNoise reduction efforts for the ALS infrared beamlines Tom

2003-01-01T23:59:59.000Z

460

Noise to lubricate qubit transfer in a spin network  

E-Print Network (OSTI)

We consider quantum state transfer in a fully connected spin network, in which the results indicate that it is impossible to achieve high fidelity by free dynamics. However, the addition of certain kinds of noise can be helpful for this purpose. In fact, we introduce a model of Gaussian white noise affecting the spin-spin couplings (edges), except those linked to the input and output node, and prove that it enhances the fidelity of state transfer. The observed noise benefit is scale free as it applies to a quantum network of any size. The amount of the fidelity enhancement, depending on the noise strength as well as on the number of edges to which it is applied, can be so high as to take the fidelity close to one.

Morteza Rafiee; Cosmo Lupo; Stefano Mancini

2013-07-12T23:59:59.000Z

Note: This page contains sample records for the topic "quality noise traffic" 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.


461

Real-time noise-robust speech detection  

E-Print Network (OSTI)

As part of the development of an autonomous forklift of the Agile Robotics Lab at MIT's Computer Science and Artificial Intelligence Lab (CSAIL), this thesis explores the effectiveness and application of various noise-robust ...

Luu, Kevin Y

2010-01-01T23:59:59.000Z

462

High efficiency photodetection below the quantum noise limit  

E-Print Network (OSTI)

Two low-noise, high quantum efficiency, high bandwidth photodetectors have constructed to form a balanced homodyne detector to detect squeezed light. The detectors have quantum efficiencies of 85% and 90%, a bandwidth of ...

Bullard, Elizabeth Caryn

2005-01-01T23:59:59.000Z

463

Noise-Induced Transitions in a Barotropic ?-Plane Channel  

Science Conference Proceedings (OSTI)

The concepts of multiplicative stochastic perturbations and noise-induced transitions are applied to a quasigeostrophic ?-plane model of barotropic flow over topography. The spectral three-component low-order representation of this configuration ...

Philip Sura

2002-01-01T23:59:59.000Z

464

On the Radiated Noise of the Autosub AUV  

E-Print Network (OSTI)

;Radiated noise of Container Ship 1 #12;FRV Scotia: Noise reduction measures t The engine is diesel: shipping, wind, rain & ice 10 20 30 40 50 60 70 80 90 100 110 120 130 140 10 100 1000 10000 100000 Centre/s wind Quartley Drizzle with 2 m/s windQuartley Wind 10 m/s Quartley Wind 2 m/sQuartley Wind 1 m

Griffiths, Gwyn

465

Aircraft Engine Noise Control as Viewed by the Engine Manufacturer  

Science Conference Proceedings (OSTI)

The aircraft engine manufacturer has been continually confronted with the factor of noise control in conjunction with the development and production testing of engines. The scope of this control activity has increased many fold during recent years as the result of the rapid growth in types and size of military power plants. Presented in this paper is a review of the over?all control procedure including typical noise sources

Donald M. Hazard

1953-01-01T23:59:59.000Z

466

Noise in non?premixed turbulent syngas flames  

Science Conference Proceedings (OSTI)

A turbulentsyngasflame may generateacoustic noise of high acoustic intensity in a combustion chamber. This may lead to the failure of construction components in a gas turbine engine in periods of the order of 1–100 hours. The research as described in the literature has almost exclusively been performed on the generation of noise in premixed methane or propane flames.Syngas fuel is a mixture of hydrogen and carbon monoxide

Sikke A. Klein; Jim B. W. Kok

1998-01-01T23:59:59.000Z

467

Analysis of kicker noise induced beam emittance growth  

SciTech Connect

Over the last few years, physicists have occasionally observed the presence of noise acting on the RHIC beams leading to emittance growth at high beam energies. While the noise was sporadic in the past, it became persistent during the Run-11 setup period. An investigation diagnosed the source as originating from the RHIC dump kicker system. Once identified the issue was quickly resolved. We report in this paper the investigation result, circuit analysis, measured and simulated waveforms, solutions, and future plans.

Zhang W.; Sandberg, J.; Ahrens, L.; Blacker, I.M.; Brennan, M.; Blaskiewicz, M.; Fischer, W.; Hahn, H.; Huang, H.; Kling, N.; Lafky, M.; Marr, G.; Mernick, K.; Mi, J.; Minty, M.; Naylor, C.; Roser, T.; Shrey, T.; van Kuik, B.; Zelenski, A.

2012-05-20T23:59:59.000Z

468

Suppression of shot noise and spontaneous radiation in electron beams  

Science Conference Proceedings (OSTI)

Shot noise in the electron beam distribution is the main source of noise in high-gain FEL amplifiers, which may affect applications ranging from single- and multi-stage HGHG FELs to an FEL amplifier for coherent electron cooling. This noise also imposes a fundamental limit of about 10{sup 6} on FEL gain, after which SASE FELs saturate. There are several advantages in strongly suppressing this shot noise in the electron beam, and the corresponding spontaneous radiation. For more than a half-century, a traditional passive method has been used successfully in practical low-energy microwave electronic devices to suppress shot noise. Recently, it was proposed for this purpose in FELs. However, being passive, the method has some significant limitations and is hardly suitable for the highly inhomogeneous beams of modern high-gain FELs. I present a novel active method of suppressing, by many orders-of-magnitude, the shot noise in relativistic electron beams. I give a theoretical description of the process, and detail its fundamental limitation.

Litvinenko,V.

2009-08-23T23:59:59.000Z

469

Quality System Documentation Management  

Science Conference Proceedings (OSTI)

Quality System Documentation Management. ... Minutes, summaries, or notes from Management Meetings of significance are archived here. ...

2012-08-21T23:59:59.000Z

470

Improving Indoor Environmental Quality and Energy Performance of Modular  

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

Indoor Environmental Quality and Energy Performance of Modular Indoor Environmental Quality and Energy Performance of Modular Classroom HVAC Systems Title Improving Indoor Environmental Quality and Energy Performance of Modular Classroom HVAC Systems Publication Type Conference Proceedings Year of Publication 2005 Authors Apte, Michael G., Michael Spears, Chi-Ming Lai, and Derek G. Shendell Conference Name Proceedings of Sustainable Buildings 2005 Conference Pagination 1432-1437 Conference Location Tokyo, Japan, September 27-29, 2005 Abstract The factory-built relocatable classroom (RC) is a dominant force in the school facility construction industry in the United States (U.S.) and elsewhere. It is estimated that there are approximately 650,000 RCs currently occupied in the U.S., housing about 16 million students. RCs receive public attention due to complaints about poor indoor environmental quality (IEQ). Both measured data and anecdotal evidence in California have suggested excessive acoustical noise from heating, ventilation, and air conditioning (HVAC) equipment as a central factor leading to degraded IEQ. In the U.S., RCs are typically equipped with unitary exterior wall-mount HVAC systems, and interior acoustical noise due to structural and airborne transmission can reach levels of about 58dB(A) with compressor cycling, under unoccupied conditions. Due to these noise levels teachers often simply choose to turn off the HVAC, leading to inadequate ventilation, as well as poor thermal conditioning, and thus to poor indoor air quality. Elevated levels of carbon dioxide and volatile organic compounds including formaldehyde are common. We discuss the acoustic component of our efforts to develop and test energy efficient HVAC systems that address the ventilation, controls, and acoustic requirements necessary to ensure high quality indoor environments in RCs

471

Non-linear addressing scheme for a lookup-based transformation function in a reconfigurable noise generator  

Science Conference Proceedings (OSTI)

Noise generation is used in several application domains, and each one of them has its own requirements for the statistical properties of the noise signal. This paper presents an approach that allows flexible noise generation based on reconfigurable logic. ... Keywords: LUT, addressing scheme, gauss, lookup-table, noise, noise generator, normal distribution, probability distribution function, transformation function, white noise

Elvio Dutra; Leandro Indrusiak; Manfred Glesner

2005-09-01T23:59:59.000Z

472

Stochastic noise characteristics in matrix inversion tomosynthesis (MITS)  

SciTech Connect

Matrix inversion tomosynthesis (MITS) uses known imaging geometry and linear systems theory to deterministically separate in-plane detail from residual tomographic blur in a set of conventional tomosynthesis (''shift-and-add'') planes. A previous investigation explored the effect of scan angle (ANG), number of projections (N), and number of reconstructed planes (NP) on the MITS impulse response and modulation transfer function characteristics, and concluded that ANG=20 deg., N=71, and NP=69 is the optimal MITS imaging technique for chest imaging on our prototype tomosynthesis system. This article examines the effect of ANG, N, and NP on the MITS exposure-normalized noise power spectra (ENNPS) and seeks to confirm that the imaging parameters selected previously by an analysis of the MITS impulse response also yield reasonable stochastic properties in MITS reconstructed planes. ENNPS curves were generated for experimentally acquired mean-subtracted projection images, conventional tomosynthesis planes, and MITS planes with varying combinations of the parameters ANG, N, and NP. Image data were collected using a prototype tomosynthesis system, with 11.4 cm acrylic placed near the image receptor to produce lung-equivalent beam hardening and scattered radiation. Ten identically acquired tomosynthesis data sets (realizations) were collected for each selected technique and used to generate ensemble mean images that were subtracted from individual image realizations prior to noise power spectra (NPS) estimation. NPS curves were normalized to account for differences in entrance exposure (as measured with an ion chamber), yielding estimates of the ENNPS for each technique. Results suggest that mid- and high-frequency noise in MITS planes is fairly equivalent in magnitude to noise in conventional tomosynthesis planes, but low-frequency noise is amplified in the most anterior and posterior reconstruction planes. Selecting the largest available number of projections (N=71) does not incur any appreciable additive electronic noise penalty compared to using fewer projections for roughly equivalent cumulative exposure. Stochastic noise is minimized by maximizing N and NP but increases with increasing ANG. The noise trend results for NP and ANG are contrary to what would be predicted by simply considering the MITS matrix conditioning and likely result from the interplay between noise correlation and the polarity of the MITS filters. From this study, the authors conclude that the previously determined optimal MITS imaging strategy based on impulse response considerations produces somewhat suboptimal stochastic noise characteristics, but is probably still the best technique for MITS imaging of the chest.

Godfrey, Devon J.; McAdams, H. P.; Dobbins, James T. III [Department of Radiology, Department of Biomedical Engineering, and Department of Radiation Oncology, Duke Advanced Imaging Laboratories, Duke University, DUMC 3295, Durham, North Carolina 27710 (United States); Department of Radiology, Duke Advanced Imaging Laboratories, Duke University, DUMC 3308, Durham, North Carolina 27710 (United States); Department of Radiology and Department of Biomedical Engineering, Duke Advanced Imaging Laboratories, Medical Physics Graduate Program, Duke University, 2424 Erwin Rd., Suite 302, Durham, North Carolina 27705 (United States)

2009-05-15T23:59:59.000Z

473

A decision process framework: selecting strategies for rehabilitation of rigid pavements subjected to high traffic volumes  

E-Print Network (OSTI)

Concrete pavements, underdesigned for today's levels of traffic, are deteriorating rapidly. Maintenance, rehabilitation, and reconstruction activities (MRR) have become more widespread and costly. State highway agencies are often being asked to do more MRR work with fewer funds. An improved and comprehensive decision process for selecting the preferred strategy for MRR that considers not only pavement but also traffic and construction issues is needed. Research was conducted to develop a framework for selecting strategies for MRR. The factors, steps, and information involved in the MRR decision process were identified. A decision analysis tool, IDEF0, was used to model the decision process framework. The IDEF0 model is hierarchical in nature (each function is divided into subfunctions) and includes the information flow between the different functions. Data was collected through project case studies and interviews to evaluate and refine the framework. Further research will be necessary to expand the model to a higher level of detail.

Valls, Marc Edouard Josep

2000-01-01T23:59:59.000Z

474

Some exact solutions to the Lighthill Whitham Richards Payne traffic flow equations  

E-Print Network (OSTI)

We find a class of exact solutions to the Lighthill Whitham Richards Payne (LWRP) traffic flow equations. Using two consecutive lagrangian transformations, a linearization is achieved. Next, depending on the initial density, we either apply (again two) Lambert functions and obtain exact formulas for the dependence of the car density and velocity on x and t, or else, failing that, the same result in a parametric representation. The calculation always involves two possible factorizations of a consistency condition. Both must be considered. In physical terms, the lineup usually separates into two offshoots at different velocities. Each velocity soon becomes uniform. This outcome in many ways resembles the two soliton solution to the Korteweg-de Vries equation. We check general conservation requirements. Although traffic flow research has developed tremendously since LWRP, this calculation, being exact, may open the door to solving similar problems, such as gas dynamics or water flow in rivers. With this possibil...

Rowlands, G; Skorupski, A A

2013-01-01T23:59:59.000Z

475

Street-based Topological Representations and Analyses for Predicting Traffic Flow in GIS  

E-Print Network (OSTI)

It is well received in the space syntax community that traffic flow is significantly correlated to a morphological property of streets, which are represented by axial lines, forming a so called axial map. The correlation co-efficient (R square value) approaches 0.8 and even a higher value according to the space syntax literature. In this paper, we study the same issue using the Hong Kong street network and the Hong Kong Annual Average Daily Traffic (AADT) datasets, and find surprisingly that street-based topological representations (or street-street topologies) tend to be better representations than the axial map. In other words, vehicle flow is correlated to a morphological property of streets better than that of axial lines. Based on the finding, we suggest the street-based topological representations as an alternative GIS representation, and the topological analyses as a new analytical means for geographic knowledge discovery.

Jiang, Bin

2007-01-01T23:59:59.000Z

476

Traffic Management Command, ATTN: MT-INFF, 5611 Columbia Pike, Falls  

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

/ 'Vol 52,-No. 212. !/- Tuesday; November 3, -1987 1 Notices.- . / 'Vol 52,-No. 212. !/- Tuesday; November 3, -1987 1 Notices.- . . and responsibility of that company. This is not intented to prevent a carrier from interchanging equipment to allow for the through movement of traffic. Master- leases which do not meet the requirements of a long-term lease or that depend on other documentation and/or subleases to be complete are viewed as trip-leases. DATE: Comments must be received on or before 1 January 1988. ADDRESS: Comments should be addressed to: Headquarters, Military Traffic Management Command, ATTN: MT-INFF, 5611 Columbia Pike, Falls Church, VA 22041-5050. FOR FURTHER INFORMATION CONTACT. Ms. Patricia McCormick, HQMTMC 5611 Columbia Pike, Falls Church, VA 22041- 5050, (202] 756-1887. SUPPLEMENTARY INFORMATION. Master- leases which do not conform to the

477

U-259: RSA BSAFE SSL-C Lets Remote Users Decrypt SSL/TLS Traffic and SSL  

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

259: RSA BSAFE SSL-C Lets Remote Users Decrypt SSL/TLS Traffic 259: RSA BSAFE SSL-C Lets Remote Users Decrypt SSL/TLS Traffic and SSL Buffer Overflow Lets Remote Users Execute Arbitrary Code U-259: RSA BSAFE SSL-C Lets Remote Users Decrypt SSL/TLS Traffic and SSL Buffer Overflow Lets Remote Users Execute Arbitrary Code September 13, 2012 - 6:00am Addthis PROBLEM: RSA BSAFE SSL-C Lets Remote Users Decrypt SSL/TLS Traffic and SSL Buffer Overflow Lets Remote Users Execute Arbitrary Code PLATFORM: RSA BSAFE SSL-C prior to 2.8.6 ABSTRACT: RSA BSAFE SSL-C Multiple Vulnerabilities reference LINKS: Secunia Advisory SA50601 SecurityTracker Alert ID: 1027514 SecurityTracker Alert ID: 1027513 CVE-2011-3389 CVE-2012-2110 CVE-2012-2131 IMPACT ASSESSMENT: High Discussion: EMC has acknowledged a weakness and a vulnerability in RSA BSAFE, which can

478

Computer program development specification for the air traffic control subsystem of the Man-Vehicle Systems Research Facility.  

E-Print Network (OSTI)

Functional summary: The Air Traffic Control (ATC) Subsystem of the Man-Vehicle System Research Facility (MVSRF) is a hardware/software complex which provides the MVSRF with the capability of simulating the multi-aircraft, ...

Massachusetts Institute of Technology. Flight Transportation Laboratory

1982-01-01T23:59:59.000Z

479

Queue length asymptotics for generalized max-weight scheduling in the presence of heavy-tailed traffic  

E-Print Network (OSTI)

We investigate the asymptotic behavior of the steady-state queue length distribution under generalized max-weight scheduling in the presence of heavy-tailed traffic. We consider a system consisting of two parallel queues, ...

Jagannathan

480

Avoiding low frequency noise in packaged HVAC equipment  

Science Conference Proceedings (OSTI)

The purpose of this article is to help those involved in the design and commissioning of packaged HVAC systems to understand the root causes of low frequency noise problems and how to avoid many of them at the design stage. In the 1980's, two things happened to dramatically change the types of noise problems encountered in typical new construction. The first was the introduction of new energy regulations that favored variable air volume (VAV) distribution systems over constant volume air distribution systems. A by-product of VAV design is that mid- and high frequency sound pressure levels produced by current air terminal devices and diffusers in many applications are significantly lower than in the past. The second factor was a trend away from the use of built-up central station fan equipment in favor of packaged, floor-by-floor air handlers or rooftop units. As a result, today's HVAC system noise problems are not confined to just the roar and hiss of the past, but now include intense low frequency rumble and time modulation. Indeed, most current noise problems in modern buildings occur in the frequency range well below 250 Hz. A large fraction of these are a result of the dominant sound pressure levels in the 12 to 40 Hz region. These factors, combined with a substantial increase in the level of low frequency sound from the rest of the system, can produce a non-neutral, time modulated, rumbly sounding background noise that many people find objectionable.

Ebbing, C.E. (Carrier Corp., Syracuse, NY (United States). Commercial Unitary Division); Blazier, W.E.Jr. (Warren Blazier Associates, San Francisco, CA (United States))

1993-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "quality noise traffic" 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.


481

An optical spectrum analyzer with quantum limited noise floor  

E-Print Network (OSTI)

Interactions between atoms and lasers provide the potential for unprecedented control of quantum states. Fulfilling this potential requires detailed knowledge of frequency noise in optical oscillators with state-of-the-art stability. We demonstrate a technique that precisely measures the noise spectrum of an ultra-stable laser using optical lattice-trapped $^{87}$Sr atoms as a quantum projection noise-limited reference. We determine the laser noise spectrum from near DC to 100 Hz via the measured fluctuations in atomic excitation, guided by a simple and robust theory model. The noise spectrum yields a 26(4) mHz linewidth at a central frequency of 429 THz, corresponding to an optical Q of $1.6\\times10^{16}$. This approach improves upon optical heterodyne beats between two similar laser systems by providing information unique to a single laser, and complements the traditionally used Allan deviation which evaluates laser performance at relatively long time scales. We use this technique to verify the reduction of...

Bishof, Michael; Martin, Michael J; Ye, Jun

2013-01-01T23:59:59.000Z

482

Subtraction-noise projection in gravitational-wave detector networks  

SciTech Connect

In this paper, we present a successful implementation of a subtraction-noise projection method into a simple, simulated data analysis pipeline of a gravitational-wave search. We investigate the problem to reveal a weak stochastic background signal which is covered by a strong foreground of compact-binary coalescences. The foreground, which is estimated by matched filters, has to be subtracted from the data. Even an optimal analysis of foreground signals will leave subtraction noise due to estimation errors of template parameters which may corrupt the measurement of the background signal. The subtraction noise can be removed by a noise projection. We apply our analysis pipeline to the proposed future-generation space-borne Big Bang Observer mission which seeks for a stochastic background of primordial gravitational waves in the frequency range {approx}0.1 Hz--1 Hz covered by a foreground of black-hole and neutron-star binaries. Our analysis is based on a simulation code which provides a dynamical model of a time-delay interferometer network. It generates the data as time series and incorporates the analysis pipeline together with the noise projection. Our results confirm previous ad hoc predictions which say that the Big Bang Observer will be sensitive to backgrounds with fractional energy densities below {omega}=10{sup -16}.

Harms, Jan; Mahrdt, Christoph; Otto, Markus; Priess, Malte [Institut fuer Gravitationsphysik, Universitaet Hannover and Max-Planck-Institut fuer Gravitationsphysik (Albert-Einstein-Institut), Callinstrasse 38, 30167 Hannover (Germany)

2008-06-15T23:59:59.000Z

483

Study on the relationship between left-turn traffic operations and safety at signalized intersections  

E-Print Network (OSTI)

Intersections are the most complex locations in a traffic system and are likely to have a higher crash count than any other location in the system. Intersection safety is related to traffic operations, such as traffic signal and approaching volume. The objective of this study is to determine the contributing factor for left-turn crashes at signalized intersections by a statistical modeling process and to develop crash prediction models. Potential contributing factors representing the characteristic of a left-turn operation were identified and considered for inclusion in crash prediction models. HCS (Highway Capacity Software) 2000 was utilized for computing some traffic indicators such as volume to capacity ratio for potential inclusion in the models. Three years of crash data were collected in the College Station area. The Signal timing and Volume data were obtained from public works in College Station. The volume data was sorted into three time periods and signal timing data were obtained for three different time periods: AM, noon, and PM. The division of time periods results from timing plans being changed for different periods. Relationship between crash count and each factor was explored to identify whether the factor has the potential to influence the crash count. Afterwards, the prediction models were developed using the negative binomial structure because of many zero samples. Akaike Information Criteria was used for selecting the model having the best fit. Wald tables provided that variables have significance in affecting the left-turn crash count. Left-turn type, sequence, volume, control delay, and post speed limit were identified as significant factors impacting left-turn crash count at a signalized intersection.

Lee, Sunghoon

2007-08-01T23:59:59.000Z

484

Large deviation properties of constant rate data streams sharing a buffer with variable rate cross traffic  

Science Conference Proceedings (OSTI)

We consider a constant rate data stream which shares a buffer with a variable rate data stream. A first come first serve service discipline is applied at the buffer. After service at the first buffer the variable rate traffic leaves the system, whereas ... Keywords: 68M20, 90B15, Markov-modulated fluid sources, fluid model, large buffer asymptotics, many sources asymptotics, on-off sources, primary 60F10, queueing network, secondary 60K25

Kurt Majewski

2008-10-01T23:59:59.000Z

485

An integrated model of traffic, geography and economy in the Internet  

E-Print Network (OSTI)

Modeling Internet growth is important both for understanding the current network and to predict and improve its future. To date, Internet models have typically attempted to explain a subset of the following characteristics: network structure, traffic flow, geography, and economy. In this paper we present a discrete, agent-based model, that integrates all of them. We show that the model generates networks with topologies, dynamics, and (more speculatively) spatial distributions that are similar to the Internet.

Holme, Petter; Forrest, Stephanie

2008-01-01T23:59:59.000Z

486

Analysis of a Cellular Automaton Model for Car Traffic with a Slow-to-Stop Rule  

E-Print Network (OSTI)

We propose a modification of the widely known Benjamin-Johnson-Hui (BJH) cellular automaton model for single-lane traffic simulation. In particular, our model includes a ‘slow-to-stop’ rule that exhibits more realistic microscopic driver behaviour than the BJH model. We present some statistics related to fuel economy and pollution generation and show that our model differs greatly in these measures. We give concise results based on extensive simulations using our system.

Adam Clarridge; Kai Salomaa

2009-01-01T23:59:59.000Z

487

Flare Noise Reduction Exxon Chemical- Baytown Olefins Plant: 1994 CMA Energy Efficiency Award for "Flare Noise Reduction" in the category of "Public Outreach/Plant Site"  

E-Print Network (OSTI)

Numerous community complaints were received because of what nearby residents perceived as excessive noise from BOP's elevated flares. Representatives from the Baytown Olefins Plant met with community residents to better understand their concerns. This qualitative data helped identify the flare noise problem to which BOP responded. BOP continued to solicit community feedback as various flare noise tests were conducted. Of particular concern to the community were low frequency rumbling noise and a higher frequency noise that resembles the sound of a jet plane passing overhead. To supplement the qualitative data received from the community, quantitative noise data was collected at various flaring conditions, wind conditions, and steam rates. Additional testing was performed to determine optimum steam rates for flaring events that could eliminate smoking and minimize noise. These tests concluded that reducing steam to the flare could reduce flare noise without jeopardizing smokeless operation. High intensity, low frequency rumbling noise (0-10 Hz), was rattling the windows and doors in the nearby community. It is typically generated by flame instability. Flame instability was occurring at BOP at fairly low flaring rates, and has been attributed to changes in the flare gas heating value and flare steam rates. Although a moderate amount of center steam lifts the flame off the top of the flare tip and prevents backburning (another source of flare noise), too much center steam makes a flame even less stable. This instability essentially causes a series of small explosions at the flare tip that generate low frequency noise. Combustion noise and steam injection noise contributed to the jet engine sound that was objectionable to the community. Steam injection noise increases as the amount of hydrocarbon burned in the flare increases, and noise increases as both hydrocarbon and steam injection increase. Although it is difficult to minimize the hydrocarbon to the flare, the steam to hydrocarbon ratio can be controlled to a minimum amount required for smokeless operation. Additionally, BOP can optimize the use of its two flares to reduce noise.

Bradham, S.; Stephan, R.

1996-04-01T23:59:59.000Z

488

Environmental Assessment for Proposed Access Control and Traffic Improvements at Los Alamos National Laboratory, Los Alamos, New Mexico  

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

29 29 Environmental Assessment for Proposed Access Control and Traffic Improvements at Los Alamos National Laboratory, Los Alamos, New Mexico August 23, 2002 Department of Energy National Nuclear Security Administration Los Alamos Site Office Environmental Assessment for Proposed Access Control and Traffic Improvements at LANL DOE LASO August 23, 2002 iii Contents ACRONYMS AND TERMS ......................................................................................................... VI EXECUTIVE SUMMARY......................................................................................................... VIII 1.0 PURPOSE AND NEED ............................................................................................................

489

Two-Parameter Heavy-Traffic Limits for Infinite-Server Queues  

E-Print Network (OSTI)

In order to obtain Markov heavy-traffic approximations for infinite-server queues with general non-exponential service-time distributions and general arrival processes, possibly with time-varying arrival rates, we establish heavy-traffic limits for two-parameter stochastic processes. We consider the random variables $Q^e(t,y)$ and $Q^r(t,y)$ representing the number of customers in the system at time $t$ that have elapsed service times less than or equal to time $y$, or residual service times strictly greater than $y$. We also consider $W^r(t,y)$ representing the total amount of work in service time remaining to be done at time $t+y$ for customers in the system at time $t$. The two-parameter stochastic-process limits in the space $D([0,\\infty),D)$ of $D$-valued functions in $D$ draw on, and extend, previous heavy-traffic limits by Glynn and Whitt (1991), where the case of discrete service-time distributions was treated, and Krichagina and Puhalskii (1997), where it was shown that the variability of service tim...

Pang, Guodong

2008-01-01T23:59:59.000Z

490

Rationality and Traffic Attraction: Incentives for Honest Path Announcements in BGP  

E-Print Network (OSTI)

We study situations in which autonomous systems (ASes) may have incentives to send BGP announcements differing from the AS-level paths that packets traverse in the data plane. Prior work on this issue assumed that ASes seek only to obtain the best possible outgoing path for their traffic. In reality, other factors can influence a rational AS’s behavior. Here we consider a more natural model, in which an AS is also interested in attracting incoming traffic (e.g., because other ASes pay it to carry their traffic). We ask what combinations of BGP enhancements and restrictions on routing policies can ensure that ASes have no incentive to lie about their data-plane paths. We find that protocols like S-BGP alone are insufficient, but that S-BGP does suffice if coupled with additional (quite unrealistic) restrictions on routing policies. Our game-theoretic analysis illustrates the high cost of ensuring that the ASes honestly announce data-plane paths in their BGP path announcements.

Sharon Goldberg; Shai Halevi; Aaron D. Jaggard; Vijay Ramachandran; Rebecca N. Wright

2008-01-01T23:59:59.000Z

491

Ambient Addition: How to turn urban noise into music  

E-Print Network (OSTI)

As human civilization devises ever more powerful machines, living among them may become more difficult. We may find ourselves surrounded by incidentally created sounds and noises which are out of synchronization with our momentary needs and discordant. Currently, legislating noise pollution is the only articulated solution and clearly it is not very effective. Our impression of sound, however, may be mediated and manipulated, transformed into something less jarring. So far, Walkmans and sound canceling headphones have done this, isolating us from noise but also from one another. In their place, a next generation headphone system is proposed which integrates environmental sound into a personal soundscape. It allows one to synthesize music from environmental sound using a number of digital signal processing (DSP) algorithms to create a sonic space in which the listener remains connected with his or her surroundings, is also cushioned from the most harsh and arrhythmic incursions and may also be drawn to

Noah Vawter; Noah Vawter; Noah Vawter; Chris Csikszentmihályi; Noah Vawter; Barry Vercoe

2006-01-01T23:59:59.000Z

492

A computer program for HVDC converter station RF noise calculations  

SciTech Connect

HVDC converter station operations generate radio frequency (RF) electromagnetic (EM) noise which could interfere with adjacent communication and computer equipment, and carrier system operations. A generic Radio Frequency Computer Analysis Program (RAFCAP) for calculating the EM noise generated by valve ignition of a converter station has been developed as part of a larger project. The program calculates RF voltages, currents, complex power, ground level electric field strength and magnetic flux density in and around an HVDC converter station. The program requires the converter station network to be represented by frequency dependent impedance functions. Comparisons of calculated and measured values are given for an actual HVDC station to illustrate the validity of the program. RAFCAP is designed to be used by engineers for the purpose of calculating the RF noise produced by the igniting of HVDC converter valves.

Kasten, D.G.; Caldecott, R.; Sebo, S.A. (Ohio State Univ., Columbus, OH (United States). Dept. of Electrical Engineering); Liu, Y. (Virginia Polytechnic Inst. State Univ., Blacksburg, VA (United States). Bradley Dept. of Electrical Engineering)

1994-04-01T23:59:59.000Z

493

In plant partial noise enclosures for the mining industry  

SciTech Connect

The Physical and Toxic Agents Division of the Mine Safety and Health Administration`s Pittsburgh Safety and Health Technology Center has conducted three joint noise control demonstrations at dry milling operations. These demonstrations were conducted on a rod mill, a roller mill, and a ball mill, in order to survey a representative sample of the more commonly utilized types of milling equipment. The noise control concept that was demonstrated involved the construction of partial enclosures surrounding the mills and then adding acoustical materials within the enclosures to absorb the build up of acoustical energy. The results of this work illustrate the feasibility of this concept, the physical principle of creating an acoustical shadow, and the ability to closely predict the amount of absorptive material required to reduce the noise levels so as to comply with the Code of Federal Regulations (CFR), Title 30.

Kinevy, P.T.

1993-10-01T23:59:59.000Z

494

Revised noise criteria for design and rating of HVAC systems  

Science Conference Proceedings (OSTI)

This paper reviews current methods of rating the noise produced by HVAC systems and explains why these ratings fail to be correlated with subjective opinion in many cases. An entirely new method of assigning noise ratings is proposed which is expected to provide a significantly better correlation between objective measurements and subjective response. The proposed new rating method makes use of a revised set of noise criterion curves (RC curves) which appeared for the first time in Chap. 35 of the 1980 Systems Volume of the ASHRAE Handbook. This paper also discusses the technical considerations leading to the development of the RC curves as a replacement for the NC curves which have been used in the past.

Warren E. Blazier Jr.

1984-01-01T23:59:59.000Z

495

Downhole steam quality measurement  

SciTech Connect

An empirical method for the remote sensing of steam quality that can be easily adapted to downhole steam quality measurements by measuring the electrical properties of two-phase flow across electrode grids at low frequencies.

Lee, David O. (Albuquerque, NM); Montoya, Paul C. (Albuquerque, NM); Muir, James F. (Albuquerque, NM); Wayland, Jr., J. Robert (Albuquerque, NM)

1987-01-01T23:59:59.000Z

496

Quantifying software quality  

Science Conference Proceedings (OSTI)

In Software Quality Assurance the quality of the program must be defined in practical and measurable terms. This is accomplished by first standardizing the error reporting technique, identifying the types and frequency of occurrence of software errors ...

Kenneth S. Hendis

1981-01-01T23:59:59.000Z

497

Isolating intrinsic noise sources in a stochastic genetic switch  

E-Print Network (OSTI)

The stochastic mutual repressor model is analysed using perturbation methods. This simple model of a gene circuit consists of two genes and three promotor states. Either of the two protein products can dimerize, forming a repressor molecule that binds to the promotor of the other gene. When the repressor is bound to a promotor, the corresponding gene is not transcribed and no protein is produced. Either one of the promotors can be repressed at any given time or both can be unrepressed, leaving three possible promotor states. This model is analysed in its bistable regime in which the deterministic limit exhibits two stable fixed points and an unstable saddle, and the case of small noise is considered. On small time scales, the stochastic process fluctuates near one of the stable fixed points, and on large time scales, a metastable transition can occur, where fluctuations drive the system past the unstable saddle to the other stable fixed point. To explore how different intrinsic noise sources affect these transitions, fluctuations in protein production and degradation are eliminated, leaving fluctuations in the promotor state as the only source of noise in the system. Perturbation methods are then used to compute the stability landscape and the distribution of transition times, or first exit time density. To understand how protein noise affects the system, small magnitude fluctuations are added back into the process, and the stability landscape is compared to that of the process without protein noise. It is found that significant differences in the random process emerge in the presence of protein noise.

Jay Newby

2011-11-06T23:59:59.000Z

498

An study of the tree generation algorithms in equation based model learning with low quality data  

Science Conference Proceedings (OSTI)

The undesired effects of data gathered from real world can be produced by the noise in the process, the bias of the sensors and the presence of hysteresis, among other uncertainty sources. In previous works the learning models using the so-called Low ... Keywords: genetic algorithm and programming, genetic programming, low quality data, multiobjective simulated annealing

Alba Berzosa; José R. Villar; Javier Sedano; Marco García-Tamargo; Enrique de la Cal

2011-05-01T23:59:59.000Z

499

Green Noise or Green Value? Measuring the Effects of Environmental  

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

Noise or Green Value? Measuring the Effects of Noise or Green Value? Measuring the Effects of Environmental Certification on Office Values Secondary menu About us Press room Contact Us Portfolio Manager Login Facility owners and managers Existing buildings Commercial new construction Industrial energy management Small business Service providers Service and product providers Verify applications for ENERGY STAR certification Design commercial buildings Energy efficiency program administrators Commercial and industrial program sponsors Associations State and local governments Federal agencies Tools and resources Training In This Section Campaigns Commercial building design Communications resources Energy management guidance Financial resources Portfolio Manager Products and purchasing Recognition Research and reports Service and product provider (SPP) resources

500

Noise-cancelling quadrature magnetic position, speed and direction sensor  

DOE Patents (OSTI)

An array of three magnetic sensors in a single package is employed with a single bias magnet for sensing shaft position, speed and direction of a motor in a high magnetic noise environment. Two of the three magnetic sensors are situated in an anti-phase relationship (i.e., 180.degree. out-of-phase) with respect to the relationship between the other of the two sensors and magnetically salient target, and the third magnetic sensor is situated between the anti-phase sensors. The result is quadrature sensing with noise immunity for accurate relative position, speed and direction measurements.

Preston, Mark A. (Niskayuna, NY); King, Robert D. (Schenectady, NY)

1996-01-01T23:59:59.000Z