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1

Next Generation Advanced Video Guidance Sensor  

NASA Technical Reports Server (NTRS)

The first autonomous rendezvous and docking in the history of the U.S. Space Program was successfully accomplished by Orbital Express, using the Advanced Video Guidance Sensor (AVGS) as the primary docking sensor. The United States now has a mature and flight proven sensor technology for supporting Crew Exploration Vehicles (CEV) and Commercial Orbital Transport. Systems (COTS) Automated Rendezvous and Docking (AR&D). AVGS has a proven pedigree, based on extensive ground testing and flight demonstrations. The AVGS on the Demonstration of Autonomous Rendezvous Technology (DART)mission operated successfully in "spot mode" out to 2 km. The first generation rendezvous and docking sensor, the Video Guidance Sensor (VGS), was developed and successfully flown on Space Shuttle flights in 1997 and 1998. Parts obsolescence issues prevent the construction of more AVGS. units, and the next generation sensor must be updated to support the CEV and COTS programs. The flight proven AR&D sensor is being redesigned to update parts and add additional. capabilities for CEV and COTS with the development of the Next, Generation AVGS (NGAVGS) at the Marshall Space Flight Center. The obsolete imager and processor are being replaced with new radiation tolerant parts. In addition, new capabilities might include greater sensor range, auto ranging, and real-time video output. This paper presents an approach to sensor hardware trades, use of highly integrated laser components, and addresses the needs of future vehicles that may rendezvous and dock with the International Space Station (ISS) and other Constellation vehicles. It will also discuss approaches for upgrading AVGS to address parts obsolescence, and concepts for minimizing the sensor footprint, weight, and power requirements. In addition, parts selection and test plans for the NGAVGS will be addressed to provide a highly reliable flight qualified sensor. Expanded capabilities through innovative use of existing capabilities will also be discussed.

Lee, Jimmy; Spencer, Susan; Bryan, Tom; Johnson, Jimmie; Robertson, Bryan

2008-01-01

2

Next Generation Advanced Video Guidance Sensor Development and Test  

NASA Technical Reports Server (NTRS)

The Advanced Video Guidance Sensor (AVGS) was the primary docking sensor for the Orbital Express mission. The sensor performed extremely well during the mission, and the technology has been proven on orbit in other flights too. Parts obsolescence issues prevented the construction of more AVGS units, so the next generation of sensor was designed with current parts and updated to support future programs. The Next Generation Advanced Video Guidance Sensor (NGAVGS) has been tested as a breadboard, two different brassboard units, and a prototype. The testing revealed further improvements that could be made and demonstrated capability beyond that ever demonstrated by the sensor on orbit. This paper presents some of the sensor history, parts obsolescence issues, radiation concerns, and software improvements to the NGAVGS. In addition, some of the testing and test results are presented. The NGAVGS has shown that it will meet the general requirements for any space proximity operations or docking need.

Howard, Richard T.; Bryan, Thomas C.; Lee, Jimmy; Robertson, Bryan

2009-01-01

3

Advanced Video Guidance Sensor and Next Generation Autonomous Docking Sensors  

NASA Technical Reports Server (NTRS)

In recent decades, NASA's interest in spacecraft rendezvous and proximity operations has grown. Additional instrumentation is needed to improve manned docking operations' safety, as well as to enable telerobotic operation of spacecraft or completely autonomous rendezvous and docking. To address this need, Advanced Optical Systems, Inc., Orbital Sciences Corporation, and Marshall Space Flight Center have developed the Advanced Video Guidance Sensor (AVGS) under the auspices of the Demonstration of Autonomous Rendezvous Technology (DART) program. Given a cooperative target comprising several retro-reflectors, AVGS provides six-degree-of-freedom information at ranges of up to 300 meters for the DART target. It does so by imaging the target, then performing pattern recognition on the resulting image. Longer range operation is possible through different target geometries. Now that AVGS is being readied for its test flight in 2004, the question is: what next? Modifications can be made to AVGS, including different pattern recognition algorithms and changes to the retro-reflector targets, to make it more robust and accurate. AVGS could be coupled with other space-qualified sensors, such as a laser range-and-bearing finder, that would operate at longer ranges. Different target configurations, including the use of active targets, could result in significant miniaturization over the current AVGS package. We will discuss these and other possibilities for a next-generation docking sensor or sensor suite that involve AVGS.

Granade, Stephen R.

2004-01-01

4

Next Generation Advanced Video Guidance Sensor: Low Risk Rendezvous and Docking Sensor  

NASA Technical Reports Server (NTRS)

The Next Generation Advanced Video Guidance Sensor (NGAVGS) is being built and tested at MSFC. This paper provides an overview of current work on the NGAVGS, a summary of the video guidance heritage, and the AVGS performance on the Orbital Express mission. This paper also provides a discussion of applications to ISS cargo delivery vehicles, CEV, and future lunar applications.

Lee, Jimmy; Carrington, Connie; Spencer, Susan; Bryan, Thomas; Howard, Ricky T.; Johnson, Jimmie

2008-01-01

5

The Next Generation Advanced Video Guidance Sensor: Flight Heritage and Current Development  

NASA Technical Reports Server (NTRS)

The Next Generation Advanced Video Guidance Sensor (NGAVGS) is the latest in a line of sensors that have flown four times in the last 10 years. The NGAVGS has been under development for the last two years as a long-range proximity operations and docking sensor for use in an Automated Rendezvous and Docking (AR&D) system. The first autonomous rendezvous and docking in the history of the U.S. Space Program was successfully accomplished by Orbital Express, using the Advanced Video Guidance Sensor (AVGS) as the primary docking sensor. That flight proved that the United States now has a mature and flight proven sensor technology for supporting Crew Exploration Vehicles (CEV) and Commercial Orbital Transport Systems (COTS) Automated Rendezvous and Docking (AR&D). NASA video sensors have worked well in the past: the AVGS used on the Demonstration of Autonomous Rendezvous Technology (DART) mission operated successfully in "spot mode" out to 2 km, and the first generation rendezvous and docking sensor, the Video Guidance Sensor (VGS), was developed and successfully flown on Space Shuttle flights in 1997 and 1998. This paper presents the flight heritage and results of the sensor technology, some hardware trades for the current sensor, and discusses the needs of future vehicles that may rendezvous and dock with the International Space Station (ISS) and other Constellation vehicles. It also discusses approaches for upgrading AVGS to address parts obsolescence, and concepts for minimizing the sensor footprint, weight, and power requirements. In addition, the testing of the various NGAVGS development units will be discussed along with the use of the NGAVGS as a proximity operations and docking sensor.

Howard, Richard T.; Bryan, Thomas C.

2009-01-01

6

The Advanced Video Guidance Sensor: Orbital Express and the Next Generation  

NASA Technical Reports Server (NTRS)

The Orbital Express (OE) mission performed the first autonomous rendezvous and docking in the history of the United States on May 5-6, 2007 with the Advanced Video Guidance Sensor (AVGS) acting as one of the primary docking sensors. Since that event, the OE spacecraft performed four more rendezvous and docking maneuvers, each time using the AVGS as one of the docking sensors. The Marshall Space Flight Center's (MSFC's) AVGS is a nearfield proximity operations sensor that was integrated into the Autonomous Rendezvous and Capture Sensor System (ARCSS) on OE. The ARCSS provided the relative state knowledge to allow the OE spacecraft to rendezvous and dock. The AVGS is a mature sensor technology designed to support Automated Rendezvous and Docking (AR&D) operations. It is a video-based laser-illuminated sensor that can determine the relative position and attitude between itself and its target. Due to parts obsolescence, the AVGS that was flown on OE can no longer be manufactured. MSFC has been working on the next generation of AVGS for application to future Constellation missions. This paper provides an overview of the performance of the AVGS on Orbital Express and discusses the work on the Next Generation AVGS (NGAVGS).

Howard, Richard T.; Heaton, Andrew F.; Pinson, Robin M.; Carrington, Connie L.; Lee, James E.; Bryan, Thomas C.; Robertson, Bryan A.; Spencer, Susan H.; Johnson, Jimmie E.

2008-01-01

7

The Video Generation.  

ERIC Educational Resources Information Center

Video games are neither neutral nor harmless but represent very specific social and symbolic constructs. Research on the social content of today's video games reveals that sex bias and gender stereotyping are widely evident throughout the Nintendo games. Violence and aggression also pervade the great majority of the games. (MLF)

Provenzo, Eugene F., Jr.

1992-01-01

8

Multi-Class Video Co-Segmentation with a Generative Multi-Video Model Wei-Chen Chiu Mario Fritz  

E-print Network

Multi-Class Video Co-Segmentation with a Generative Multi-Video Model Wei-Chen Chiu Mario Fritz Max Planck Institute for Informatics, Saarbr¨ucken, Germany {walon,mfritz}@mpi-inf.mpg.de Abstract Video data in videos and recent advances in video segmentation has shown great progress in exploiting these addition

9

Digest Generation Using Surveillance Video in Kindergarten  

Microsoft Academic Search

In this paper, we address the task of automatic digest generating of video data taken from kindergarten surveillance cameras. Our objective is extracting and merging video segments to recode children's daily life. In order to deal with mass video data efficiently, we jointly utilize location information and visual features to segment raw material videos. Our proposed method involves two steps.

Yu Wang; Jien Kato

2010-01-01

10

Advances in Network-adaptive Video Streaming  

Microsoft Academic Search

Internet transmission is characterized by variations in throughput, delay, and packet loss, which can severely affect the quality of multimedia presentations delivered over the network. Still, Internet video streaming has ex- perienced phenomenal growth in the last few years, ow- ing to the extensive research in video coding and trans- mission. In this paper, we review several recent advances for

Bernd Girod; Jacob Chakareski; Mark Kalman; Yi J. Liang; Eric Setton; Rui Zhang

2002-01-01

11

Automatic replay generation for soccer video broadcasting  

Microsoft Academic Search

While most current approaches for sports video analysis are based on broadcast video, in this paper, we present a novel approach for highlight detection and automatic replay generation for soccer videos taken by the main camera. This research is important as current soccer highlight detection and replay generation from a live game is a labor-intensive process. A robust multi-level, multi-model

Jinjun Wang; Changsheng Xu; Engsiong Chng; Kongwah Wah; Qi Tian

2004-01-01

12

Human Assisted Randomness Generation Using Video Games  

E-print Network

Human Assisted Randomness Generation Using Video Games Mohsen Alimomeni, Reihaneh Safavi in which we collect user input in the game, and extract randomness from it. We measure the rate direction for construction of entropy sources that can be incorporated into a large class of video games. 1

13

MediaBench II Video: Expediting the next generation of video systems research  

E-print Network

MediaBench II Video: Expediting the next generation of video systems research Jason E. Fritts *a The first step towards the design of video processors and video systems is to achieve an accurate understanding of the major video applications, including not only the fundamentals of the many video compression

Fritts, Jason

14

MediaBench II Video: Expediting the next generation of video systems research  

E-print Network

MediaBench II Video: Expediting the next generation of video systems research Jason E. Fritts The first step towards the design of video processors and video systems is to achieve an accurate understanding of the major video applications, including not only the fundamentals of the many video compression

Fritts, Jason

15

Advanced High-Definition Video Cameras  

NASA Technical Reports Server (NTRS)

A product line of high-definition color video cameras, now under development, offers a superior combination of desirable characteristics, including high frame rates, high resolutions, low power consumption, and compactness. Several of the cameras feature a 3,840 2,160-pixel format with progressive scanning at 30 frames per second. The power consumption of one of these cameras is about 25 W. The size of the camera, excluding the lens assembly, is 2 by 5 by 7 in. (about 5.1 by 12.7 by 17.8 cm). The aforementioned desirable characteristics are attained at relatively low cost, largely by utilizing digital processing in advanced field-programmable gate arrays (FPGAs) to perform all of the many functions (for example, color balance and contrast adjustments) of a professional color video camera. The processing is programmed in VHDL so that application-specific integrated circuits (ASICs) can be fabricated directly from the program. ["VHDL" signifies VHSIC Hardware Description Language C, a computing language used by the United States Department of Defense for describing, designing, and simulating very-high-speed integrated circuits (VHSICs).] The image-sensor and FPGA clock frequencies in these cameras have generally been much higher than those used in video cameras designed and manufactured elsewhere. Frequently, the outputs of these cameras are converted to other video-camera formats by use of pre- and post-filters.

Glenn, William

2007-01-01

16

CCTV Video Analytics: Recent Advances and Limitations  

NASA Astrophysics Data System (ADS)

There has been a significant increase in the number of CCTV cameras in public and private places worldwide. The cost of monitoring these cameras manually and of reviewing recorded video is prohibitive and therefore manual systems tend to be used mainly reactively with only a small fraction of the cameras being monitored at any given time. There is a need to automate at least simple observation tasks through computer vision, a functionality that has become known popularly as "video analytics". The large size of CCTV systems and the requirement of high detection rates and low false alarms are major challenges. This paper illustrates some of the recent efforts reported in the literature, highlighting advances and pointing out important limitations.

Velastin, Sergio A.

17

Control Software for Advanced Video Guidance Sensor  

NASA Technical Reports Server (NTRS)

Embedded software has been developed specifically for controlling an Advanced Video Guidance Sensor (AVGS). A Video Guidance Sensor is an optoelectronic system that provides guidance for automated docking of two vehicles. Such a system includes pulsed laser diodes and a video camera, the output of which is digitized. From the positions of digitized target images and known geometric relationships, the relative position and orientation of the vehicles are computed. The present software consists of two subprograms running in two processors that are parts of the AVGS. The subprogram in the first processor receives commands from an external source, checks the commands for correctness, performs commanded non-image-data-processing control functions, and sends image data processing parts of commands to the second processor. The subprogram in the second processor processes image data as commanded. Upon power-up, the software performs basic tests of functionality, then effects a transition to a standby mode. When a command is received, the software goes into one of several operational modes (e.g. acquisition or tracking). The software then returns, to the external source, the data appropriate to the command.

Howard, Richard T.; Book, Michael L.; Bryan, Thomas C.

2006-01-01

18

MediaBench II Video: Expediting the Next Generation of Video Systems Research  

E-print Network

MediaBench II Video: Expediting the Next Generation of Video Systems Research Jason E. Fritts, Frederick W. Steiling, and Joseph A. Tucek The first step towards the design of video processors and video systems is to achieve an accurate understanding of the major video applications, including not only

Fritts, Jason

19

Recent Advances in Video Meteor Photometry  

NASA Technical Reports Server (NTRS)

One of the most common (and obvious) problems with video meteor data involves the saturation of the output signal produced by bright meteors, resulting in the elimination of such meteors from photometric determinations. It is important to realize that a "bright" meteor recorded by intensified meteor camera is not what would be considered "bright" by a visual observer - indeed, many Generation II or III camera systems are saturated by meteors with a visual magnitude of 3, barely even noticeable to the untrained eye. As the relatively small fields of view (approx.30 ) of the camera systems captures at best modest numbers of meteors, even during storm peaks, the loss of meteors brighter than +3 renders the determination of shower population indices from video observations even more difficult. Considerable effort has been devoted by the authors to the study of the meteor camera systems employed during the Marshall Space Flight Center s Leonid ground-based campaigns, and a calibration scheme has been devised which can extend the useful dynamic range of such systems by approximately 4 magnitudes. The calibration setup involves only simple equipment, available to amateur and professional, and it is hoped that use of this technique will make for better meteor photometry, and move video meteor analysis beyond the realm of simple counts.

Swift, Wesley R.; Suggs, Robert M.; Meachem, Terry; Cooke, William J.

2003-01-01

20

Home-video content analysis for MTV-style video generation  

Microsoft Academic Search

Intelligent video pre-processing and authoring techniques that facilitate people to create MTV-style music video clips are investigated in this research. First, we present an automatic approach to detect and remove bad shots often occurring in home video, such as video with poor lighting or motion blur. Then, we consider the generation of MTV-style video clips by performing video and music

Shih-Hung Lee; Chia-Hung Yeh; C. C. Jay Kuo

2005-01-01

21

Home-video content analysis for MTV-style video generation  

NASA Astrophysics Data System (ADS)

Intelligent video pre-processing and authoring techniques that facilitate people to create MTV-style music video clips are investigated in this research. First, we present an automatic approach to detect and remove bad shots often occurring in home video, such as video with poor lighting or motion blur. Then, we consider the generation of MTV-style video clips by performing video and music tempo analysis and seeking an effective way in matching these two tempos. Experiment results are given to demonstrate the feasibility and efficiency of the proposed techniques for home video editing.

Lee, Shih-Hung; Yeh, Chia-Hung; Kuo, C. C. J.

2005-01-01

22

Home-video content analysis for MTV-style video generation  

NASA Astrophysics Data System (ADS)

Intelligent video pre-processing and authoring techniques that facilitate people to create MTV-style music video clips are investigated in this research. First, we present an automatic approach to detect and remove bad shots often occurring in home video, such as video with poor lighting or motion blur. Then, we consider the generation of MTV-style video clips by performing video and music tempo analysis and seeking an effective way in matching these two tempos. Experiment results are given to demonstrate the feasibility and efficiency of the proposed techniques for home video editing.

Lee, Shih-Hung; Yeh, Chia-Hung; Kuo, C. C. J.

2004-12-01

23

MTV-style home video generation via tempo analysis  

NASA Astrophysics Data System (ADS)

Intelligent video pre-processing and authoring techniques that facilitate people to create MTV-style music video clips are investigated in this research. First, we present an automatic approach to detect and remove bad shots often occurring in home video, such as video with poor lighting or motion blur. Then, we consider the generation of MTV-style video clips by performing video and music tempo analysis and seeking an effective way in matching these two tempos. Experiment results are given to demonstrate the feasibility and efficiency of the proposed techniques for home video editing.

Lee, Shih-Hung; Yeh, Chia H.; Kuo, C.-C. Jay

2004-10-01

24

Advanced Video Analysis Needs for Human Performance Evaluation  

NASA Technical Reports Server (NTRS)

Evaluators of human task performance in space missions make use of video as a primary source of data. Extraction of relevant human performance information from video is often a labor-intensive process requiring a large amount of time on the part of the evaluator. Based on the experiences of several human performance evaluators, needs were defined for advanced tools which could aid in the analysis of video data from space missions. Such tools should increase the efficiency with which useful information is retrieved from large quantities of raw video. They should also provide the evaluator with new analytical functions which are not present in currently used methods. Video analysis tools based on the needs defined by this study would also have uses in U.S. industry and education. Evaluation of human performance from video data can be a valuable technique in many industrial and institutional settings where humans are involved in operational systems and processes.

Campbell, Paul D.

1994-01-01

25

A System for Automatic Generation of Music Sports-Video  

Microsoft Academic Search

In this paper, we present a new representation of sports video abstract— Music Sports-Video (MSV), which provides exciting sports content accompanied with high quality background music for audiences and is available for high-quality audio-visual entertainment. We also propose a system generating MSV from user-provided sports video and music automatically. Firstly, the given sports video is segmented into a series of

Weigang Zhang; Liyuan Xing; Qingming Huang; Wen Gao

2005-01-01

26

Advances in Video-Based Biometrics  

Microsoft Academic Search

Biometrics deals with the problem of uniquely identifying individuals based on physiological or behavioral attributes. Physiological biometrics involve measurement from body parts such as the fingerprint, face, iris, etc., whereas behavioral biometrics exploits cues such as gait, voice, expressions, etc. In this chapter, we discuss video-based biometrics involving faces and gait. We discuss spatiotemporal models appropriate for each task, followed

Rama Chellappa; Pavan K. Turaga

2011-01-01

27

Recent advances in nondestructive evaluation made possible by novel uses of video systems  

NASA Technical Reports Server (NTRS)

Complex materials are being developed for use in future advanced aerospace systems. High temperature materials have been targeted as a major area of materials development. The development of composites consisting of ceramic matrix and ceramic fibers or whiskers is currently being aggressively pursued internationally. These new advanced materials are difficult and costly to produce; however, their low density and high operating temperature range are needed for the next generation of advanced aerospace systems. These materials represent a challenge to the nondestructive evaluation community. Video imaging techniques not only enhance the nondestructive evaluation, but they are also required for proper evaluation of these advanced materials. Specific research examples are given, highlighting the impact that video systems have had on the nondestructive evaluation of ceramics. An image processing technique for computerized determination of grain and pore size distribution functions from microstructural images is discussed. The uses of video and computer systems for displaying, evaluating, and interpreting ultrasonic image data are presented.

Generazio, Edward R.; Roth, Don J.

1990-01-01

28

Orbital Express Advanced Video Guidance Sensor  

NASA Technical Reports Server (NTRS)

In May 2007 the first US fully autonomous rendezvous and capture was successfully performed by DARPA's Orbital Express (OE) mission. Since then, the Boeing ASTRO spacecraft and the Ball Aerospace NEXTSat have performed multiple rendezvous and docking maneuvers to demonstrate the technologies needed for satellite servicing. MSFC's Advanced Video Guidance Sensor (AVGS) is a primary near-field proximity operations sensor integrated into ASTRO's Autonomous Rendezvous and Capture Sensor System (ARCSS), which provides relative state knowledge to the ASTRO GN&C system. This paper provides an overview of the AVGS sensor flying on Orbital Express, and a summary of the ground testing and on-orbit performance of the AVGS for OE. The AVGS is a laser-based system that is capable of providing range and bearing at midrange distances and full six degree-of-freedom (6DOF) knowledge at near fields. The sensor fires lasers at two different frequencies to illuminate the Long Range Targets (LRTs) and the Short Range Targets (SRTs) on NEXTSat. Subtraction of one image from the other image removes extraneous light sources and reflections from anything other than the corner cubes on the LRTs and SRTs. This feature has played a significant role for Orbital Express in poor lighting conditions. The very bright spots that remain in the subtracted image are processed by the target recognition algorithms and the inverse-perspective algorithms, to provide 3DOF or 6DOF relative state information. Although Orbital Express has configured the ASTRO ARCSS system to only use AVGS at ranges of 120 m or less, some OE scenarios have provided opportunities for AVGS to acquire and track NEXTSat at greater distances. Orbital Express scenarios to date that have utilized AVGS include a berthing operation performed by the ASTRO robotic arm, sensor checkout maneuvers performed by the ASTRO robotic arm, 10-m unmated operations, 30-m unmated operations, and Scenario 3-1 anomaly recovery. The AVGS performed very well during the pre-unmated operations, effectively tracking beyond its 10-degree Pitch and Yaw limit-specifications, and did not require I-LOAD adjustments before unmated operations. AVGS provided excellent performance in the 10-m unmated operations, effectively tracking and maintaining lock for the duration of this scenario, and showing good agreement between the short and long range targets. During the 30-m unmated operations, the AVGS continuously tracked the SRT to 31.6 m, exceeding expectations, and continuously tracked the LRT from 8.8 m out to 31.6 m, with good agreement between these two target solutions. After this scenario was aborted at a 10-m separation during remate operations, the AVGS tracked the LRT out 54.3 m, until the relative attitude between the vehicles was too large. The vehicles remained apart for eight days, at ranges from 1 km to 6 km. During the approach to remate in this recovery operation, the AVGS began tracking the LRT at 150 m, well beyond the OE planned limits for AVGS ranges, and functioned as the primary sensor for the autonomous rendezvous and docking.

Howard, Ricky; Heaton, Andy; Pinson, Robin; Carrington, Connie

2008-01-01

29

Second generation PFB for advanced power generation.  

National Technical Information Service (NTIS)

Research is being conducted under a United States Department of Energy (USDOE) contract to develop a new type of coal-fueled plant for electric power generation. This new type of plant-called an advanced or second-generation pressurized fluidized bed comb...

A. Robertson, J. Van Hook

1995-01-01

30

Detailed Precipitation Measurements for GV: Advances in Video-Distrometers  

NASA Astrophysics Data System (ADS)

The 2D-Video-Distrometer (2DVD) is an established instrument for in-situ measurements of precipitation, delivering per-particle data for solid, liquid and mixed-phase precipitation and having over 80 successful deployments world-wide to its record. At its core, two orthogonally oriented, vertically displaced and precisely aligned high-speed cameras sample hydrometeors like rain, snow, hail, graupel, ice-pellets, etc. as they fall through a sampling area of approx. 100 cm². This measurement principle, i.e. having two projections for each detected particle while gathering statistically significant data by sampling over a substantial measurement area, allows capturing and evaluation of observables like diameter, oblateness and shape, vertical velocity, and contributions to the rain rate and to the cumulative amount of rain for each individual detected particle. If particles display rotational symmetry, estimation of horizontal velocity and (for particles exceeding a diameters of approx. 1.5 mm) canting angles can be gauged, again on a per-hydrometeor basis, as well. While the 2DVD has been successfully deployed during many ground validation campaigns, some of the inherent cost and complexity constraints have so far prevented the use of 2DVD's for some applications and in some environments. In order to address these limitations of the 2DVD, research has been conducted to develop a 1D-Video-Distrometer (1DVD) which employs only one camera system but tries to retain the capability to capture as many observables on a per-particle basis as possible. First results from our activities towards such a system with reduced complexity and deployment costs are presented and comparison of data sets gathered with both 1DVD and current generation 2DVD systems are provided. Current generations of the 2DVD can yield exceptionally high data rates, especially during extreme rain events like for example tropical storms. Therefore, the software suite which accompanies each device employs dedicated algorithms and procedures in order to meet the arising high demands with respect to throughput, scalability and stability, thus allowing the instrument to cope very well with such very high data rates. Advances in camera technology, which allow for higher resolutions and larger scan rates, are bound to contribute to further increases in the amount of data. Moreover, the degree of integration and the level of complexity in forming precipitation products, including measurements from GV, are also on the rise. Due to these influences, improvements to algorithms and data formats have been studied and first results of these improvements for the 2DVD and upcoming 1DVD are presented as well.

Schwinzerl, Martin; Lammer, Günter; Schönhuber, Michael

2014-05-01

31

Advanced video technologies to support collaborative learning in school education and  

E-print Network

Advanced video technologies to support collaborative learning in school education and beyond video technology software systems developed for uses in collaborative learning (DIVER1 and HyperVideo2 ), and how they extend the paradigms of video use in classrooms today. The rationale for and characteristics

Paris-Sud XI, Université de

32

Advanced downhole periodic seismic generator  

DOEpatents

An advanced downhole periodic seismic generator system for transmitting variable frequency, predominantly shear-wave vibration into earth strata surrounding a borehole. The system comprises a unitary housing operably connected to a well head by support and electrical cabling and contains clamping apparatus for selectively clamping the housing to the walls of the borehole. The system further comprises a variable speed pneumatic oscillator and a self-contained pneumatic reservoir for producing a frequency-swept seismic output over a discrete frequency range.

Hardee, Harry C. (Albuquerque, NM); Hills, Richard G. (Las Cruces, NM); Striker, Richard P. (Albuquerque, NM)

1991-07-16

33

Comparing Simple and Advanced Video Tools as Supports for Complex Collaborative Design Processes  

Microsoft Academic Search

Working with digital video technologies, particularly advanced video tools with editing capabilities, offers new prospects for meaningful learning through design. However, it is also possible that the additional complexity of such tools does not advance learning. We compared in an experiment the design processes and learning outcomes of 24 collaborating participant pairs (dyads) using 2 contrasting types of video tools

Carmen Zahn; Roy Pea; Friedrich W. Hesse; Joe Rosen

2010-01-01

34

Automatic generation of pictorial transcripts of video programs  

NASA Astrophysics Data System (ADS)

An automatic authoring system for the generation of pictorial transcripts of video programs which are accompanied by closed caption information is presented. A number of key frames, each of which represents the visual information in a segment of the video (i.e., a scene), are selected automatically by performing a content-based sampling of the video program. The textual information is recovered from the closed caption signal and is initially segmented based on its implied temporal relationship with the video segments. The text segmentation boundaries are then adjusted, based on lexical analysis and/or caption control information, to account for synchronization errors due to possible delays in the detection of scene boundaries or the transmission of the caption information. The closed caption text is further refined through linguistic processing for conversion to lower- case with correct capitalization. The key frames and the related text generate a compact multimedia presentation of the contents of the video program which lends itself to efficient storage and transmission. This compact representation can be viewed on a computer screen, or used to generate the input to a commercial text processing package to generate a printed version of the program.

Shahraray, Behzad; Gibbon, David C.

1995-03-01

35

Simulation and ground testing with the Advanced Video Guidance Sensor  

NASA Technical Reports Server (NTRS)

The Advanced Video Guidance Sensor (AVGS), an active sensor system that provides near-range 6-degree-of-freedom sensor data, has been developed as part of an automatic rendezvous and docking system for the Demonstration of Autonomous Rendezvous Technology (DART). The sensor determines the relative positions and attitudes between the active sensor and the passive target at ranges up to 300 meters. The AVGS uses laser diodes to illuminate retro-reflectors in the target, a solid-state imager to detect the light returned from the target, and image capture electronics and a digital signal processor to convert the video information into the relative positions and attitudes. The development of the sensor, through initial prototypes, final prototypes, and three flight units, has required a great deal of testing at every phase, and the different types of testing, their effectiveness, and their results, are presented in this paper, focusing on the testing of the flight units. Testing has improved the sensor's performance.

Howard, Richard T.; Johnston, Albert S.; Bryan, Thomas C.; Book, Michael L.

2005-01-01

36

Advanced hyperspectral video imaging system using Amici prism.  

PubMed

In this paper, we propose an advanced hyperspectral video imaging system (AHVIS), which consists of an objective lens, an occlusion mask, a relay lens, an Amici prism and two cameras. An RGB camera is used for spatial reading and a gray scale camera is used for measuring the scene with spectral information. The objective lens collects more light energy from the observed scene and images the scene on an occlusion mask, which subsamples the image of the observed scene. Then, the subsampled image is sent to the gray scale camera through the relay lens and the Amici prism. The Amici prism that is used to realize spectral dispersion along the optical path reduces optical distortions and offers direct view of the scene. The main advantages of the proposed system are improved light throughput and less optical distortion. Furthermore, the presented configuration is more compact, robust and practicable. PMID:25321019

Feng, Jiao; Fang, Xiaojing; Cao, Xun; Ma, Chenguang; Dai, Qionghai; Zhu, Hongbo; Wang, Yongjin

2014-08-11

37

Daily Digest Generation of Kindergartner from Surveillance Video  

NASA Astrophysics Data System (ADS)

Nowadays, children spend most of their time in kindergarten as well as nursery schools. This directly brings a requirement to the parents: they want to see how everyday goes with their kids. To meet this requirement, in this paper, we propose a method to automatically generate video digest that records kids' daily life in kindergarten. Our method involves two steps. The first is to efficiently narrow down the searching space by analyzing the noisy RFID tag log which records kids' temporal location, while the second is to use visual features and time constrains to recognize events and pick out video segments for each individual event. The accuracy of our method was evaluated with quantitative experiment and the superior of the digest that generated by our method was confirmed via questionnaire survey.

Ishikawa, Tomoya; Wang, Yu; Kato, Jien

38

Comparing Simple and Advanced Video Tools as Supports for Complex Collaborative Design Processes  

ERIC Educational Resources Information Center

Working with digital video technologies, particularly advanced video tools with editing capabilities, offers new prospects for meaningful learning through design. However, it is also possible that the additional complexity of such tools does "not" advance learning. We compared in an experiment the design processes and learning outcomes of 24…

Zahn, Carmen; Pea, Roy; Hesse, Friedrich W.; Rosen, Joe

2010-01-01

39

Digest Generation of Kindergarten Surveillance Video with Location Information and Visual Features  

Microsoft Academic Search

In this paper, we address the task of automatic digest generating of video data taken from kindergarten surveillance cameras. Our objective is extracting and merging video segments to recode children's daily life. In order to deal with mass video data efficiently, we jointly utilize location information and visual features to segment raw material videos. Our proposed method involves two steps.

Yu Wang; Jien Kato; Wei Zhou; Shigeki Yokoi

2009-01-01

40

Human behavior understanding for video surveillance: Recent advance  

Microsoft Academic Search

With the wide applications of video cameras in surveillance, video analysis technologies have attracted the attention from the researchers in computer vision field. In video analysis, human behavior recognition and understanding is an important research direction. By recognition and understanding the human behaviors, we can predict and recognize the happening of crimes and help to the police or other agencies

Xin Xu; Jinshan Tang; Xiaorning Liu; Xiaolong Zhang

2010-01-01

41

Advances in low-light-level video imaging  

Microsoft Academic Search

Video imaging under low light level conditions necessitates a light amplification device to overcome the inherent lack of sensitivity of today's CCD video camera. Traditionally the microchannel plate image intensifier developed for military night vision goggles has been employed in front of a CCD camera to achieve low light level video imaging. Until recently the variety of these devices has

Richard A. Sturz

1995-01-01

42

Combining Search-based Procedural Content Generation and Social Gaming in the Petalz Video Game  

E-print Network

Combining Search-based Procedural Content Generation and Social Gaming in the Petalz Video Game In@gmail.com, kstanley@eecs.ucf.edu Abstract Search-based procedural content generation methods allow video games in video game research (Togelius et al. 2011) wherein parts of the game are created algorith- mically

Stanley, Kenneth O.

43

Human Biology, Health Education and the "Video Generation."  

ERIC Educational Resources Information Center

This college Life Science lecturer describes health-related videos she has integrated into her curriculum. She provides the names of specific videos for the following topics: AIDS, cocaine, alcohol, nutrition, smoking, and stress. Instructional strategies for the use of specific videos and general strategies for implementing a video approach are…

Mattson, Priscilla

1991-01-01

44

Using Heuristics to Evaluate the Overall User Experience of Video Games and Advanced Interaction Games  

Microsoft Academic Search

\\u000a This chapter describes an approach to evaluating user experience in video games and advanced interaction games (tabletop games)\\u000a by using heuristics. We provide a short overview of computer games with a focus on advanced interaction games and explain\\u000a the concept of user-centred design for games. Furthermore, we describe the history of heuristics for video games and the role\\u000a of user

Christina Koeffel; Wolfgang Hochleitner; Jakob Leitner; Michael Haller; Arjan Geven; Manfred Tscheligi

45

RECENT ADVANCES IN VIDEO COMPRESSION Bernd Girod Khaled Ben Younes Reinhard Bernstein Peter Eisert Niko Farber Frank Hartung  

E-print Network

- tive entertainment networks where video-on-demand, video games, and teleshopping are provided video telephony to high qua- lity HDTV with H.263 focusing initially on the very low bit-rate end, iRECENT ADVANCES IN VIDEO COMPRESSION Bernd Girod Khaled Ben Younes Reinhard Bernstein Peter Eisert

Eisert, Peter

46

Learner-Generated Digital Video: Using Ideas Videos in Teacher Education  

ERIC Educational Resources Information Center

This qualitative study investigates the efficacy of "Ideas Videos" (or "iVideos") in pre-service teacher education. It explores the experiences of student teachers and their lecturer engaging with this succinct, advocacy-style video genre designed to evoke emotions about powerful ideas in Education (Wong, Mishra, Koehler, &…

Kearney, Matthew

2013-01-01

47

On-line video abstract generation of multimedia news  

Microsoft Academic Search

The amount of video content available nowadays makes video abstraction techniques a necessary tool to ease the access to the\\u000a already huge and ever growing video databases. Nevertheless, many of the existing video abstraction approaches have high computational\\u000a requirements, complicating the integration and exploitation of current technologies in real environments. This paper presents\\u000a a novel method for news bulletin abstraction

Víctor Valdés; José M. Martínez

48

Orbital Express Advanced Video Guidance Sensor: Ground Testing, Flight Results and Comparisons  

NASA Technical Reports Server (NTRS)

Orbital Express (OE) was a successful mission demonstrating automated rendezvous and docking. The 2007 mission consisted of two spacecraft, the Autonomous Space Transport Robotic Operations (ASTRO) and the Next Generation Serviceable Satellite (NEXTSat) that were designed to work together and test a variety of service operations in orbit. The Advanced Video Guidance Sensor, AVGS, was included as one of the primary proximity navigation sensors on board the ASTRO. The AVGS was one of four sensors that provided relative position and attitude between the two vehicles. Marshall Space Flight Center was responsible for the AVGS software and testing (especially the extensive ground testing), flight operations support, and analyzing the flight data. This paper briefly describes the historical mission, the data taken on-orbit, the ground testing that occurred, and finally comparisons between flight data and ground test data for two different flight regimes.

Pinson, Robin M.; Howard, Richard T.; Heaton, Andrew F.

2008-01-01

49

Project Summary Advances in video technology are being incorporated into today's healthcare practice. For example,  

E-print Network

open surgical procedures now are being converted to endoscopic procedures including resection hernias, coronary artery bypass grafting and minimal invasive neurosurgeries (i.e., video endoscopic neurosurgery). During an endoscopic procedure, a tiny video camera at the tip of the endoscope generates

Oh, JungHwan

50

Effects of Narrative Script Advance Organizer Strategies Used to Introduce Video in the Foreign Language Classroom  

ERIC Educational Resources Information Center

The study compared participant comprehension of foreign language video content using two advance organizer (AO) strategies while exploring the benefits of AOs as proficiency increases. Participants were 50 advanced-beginner Spanish college students in three sections. Collaborative reading condition participants read a target language narrative…

Ambard, Philip D.; Ambard, Linda K.

2012-01-01

51

Advanced Video Information System: Data Structures and Query Processing \\Lambda  

E-print Network

Martin appears and Fred Astaire is dancing with Ginger Rogers, (Query 4) find all people who appear in the frames where Gene Kelly and Ginger Rogers are getting married, (Query 5) find all video­frames showing Ginger Rogers dancing with someone other than Fred Astaire when he is in the same room, (note that Fred

Candan, Selçuk

52

Advanced method for improvement of obscure video image  

Microsoft Academic Search

There are a lot of video cameras equipped in service windows, cash dispenser corners, in banks or all-night stores for monitoring burglars. Therefore, in case a robbery happens there, the image taken by a monitoring camera often provides important information to the criminal investigation. However, for various reasons such as quick motion of objects, small images and too much or

Y. Yamada; Police Engineer

1999-01-01

53

Movie-in-a-Minute: Automatically Generated Video Previews  

Microsoft Academic Search

\\u000a \\u000a Movie-in-a-minute is a summarization method that enables quick browsing and access to hundreds of hours of stored video programs. A movie-in-a-minute is a short video sequence composed of automatically selected portions of the original video that aims at conveying key aspects\\u000a of a program and its story in an efficient but entertaining way. In this paper we discuss an approach

Mauro Barbieri; Nevenka Dimitrova; Lalitha Agnihotri

2004-01-01

54

Automated Music Video Generation Using Multi-level Feature-based Segmentation  

NASA Astrophysics Data System (ADS)

The expansion of the home video market has created a requirement for video editing tools to allow ordinary people to assemble videos from short clips. However, professional skills are still necessary to create a music video, which requires a stream to be synchronized with pre-composed music. Because the music and the video are pre-generated in separate environments, even a professional producer usually requires a number of trials to obtain a satisfactory synchronization, which is something that most amateurs are unable to achieve.

Yoon, Jong-Chul; Lee, In-Kwon; Byun, Siwoo

55

Technology advancement of an oxygen generation subsystem  

NASA Technical Reports Server (NTRS)

An oxygen generation subsystem based on water electrolysis was developed and tested to further advance the concept and technology of the spacecraft air revitalization system. Emphasis was placed on demonstrating the subsystem integration concept and hardware maturity at a subsystem level. The integration concept of the air revitalization system was found to be feasible. Hardware and technology of the oxygen generation subsystem was demonstrated to be close to the preprototype level. Continued development of the oxygen generation technology is recommended to further reduce the total weight penalties of the oxygen generation subsystem through optimization.

Lee, M. K.; Burke, K. A.; Schubert, F. H.; Wynveen, R. A.

1979-01-01

56

Video Coding Using a Simplified Block Structure and Advanced Coding Techniques  

Microsoft Academic Search

This paper describes a new video coding scheme based on a simplified block structure that significantly outperforms the coding efficiency of the ISO\\/IEC 14496-10 $vert{rm ITU}hbox{-}{rm T}$ H.264 advanced video coding (AVC) standard. Its conceptual design is similar to a typical block-based hybrid coder applying prediction and subsequent prediction error coding. The basic coding unit is an 8 $,times,$8 block

Frank Bossen; Virginie Drugeon; Edouard François; Joel Jung; Sandeep Kanumuri; Matthias Narroschke; Hisao Sasai; Joel Solé; Yoshinori Suzuki; Thiow Keng Tan; Thomas Wedi; Steffen Wittmann; Peng Yin; Yunfei Zheng

2010-01-01

57

Advanced Coal-Based Power Generations  

NASA Technical Reports Server (NTRS)

Advanced power-generation systems using coal-derived fuels are evaluated in two-volume report. Report considers fuel cells, combined gas- and steam-turbine cycles, and magnetohydrodynamic (MHD) energy conversion. Presents technological status of each type of system and analyzes performance of each operating on medium-Btu fuel gas, either delivered via pipeline to powerplant or generated by coal-gasification process at plantsite.

Robson, F. L.

1982-01-01

58

A decoder architecture for advanced video coding standard  

NASA Astrophysics Data System (ADS)

In this paper, we describe a VLSI architecture of video decoder for AVS (Audio Video Coding Standard). The system architecture, as well as the design of major function-specific processing units (VAriable Length Decoder, Deblocking Filter), is discussed. Analyzing the architecture of decoder system and the feature of each processing unit, we develop a system controller combined the centralized and decentralized control scheme, which provides high efficient communication between the processing units and minimizes the size of interconnected buffers. A bus-arbitration algorithm named Token Ring algorithm is designed to control the allocation of the SDRAM bus. This algorithm can avoid the conflicts on bus and reduce the internal buffer size, and its control logic is simple. Our simulation shows that this architecture can meet the requirement of AVS Jizhun Profile@4.0 level real time decoding, without a high cost in hardware and clock rate. Moreover, some design idea in the AVS decoder can be expanded to H.264 because of the similarity between teh two video coding standards.

Li, Dianfu; Yu, Lu; Dong, Jie

2005-07-01

59

Internet Teleprescence by Real-Time View-Dependent Image Generation with Omnidirectional Video Camera  

Microsoft Academic Search

This paper describes a new networked telepresence system which realizes virtual tours into a visualized dynamic real world without significant time delay. Our system is realized by the following three steps: (1) video-rate omnidirectional image acquisition, (2) transportation of an omnidirectional video stream via internet, and (3) real-time view-dependent perspective image generation from the omnidirectional video stream. Our system is

Shinji Morita; Kazumasa Yamazawa; Naokazu Yokoya

2003-01-01

60

Real-Time Video Filtering and Overlay Character Generation on FPGA  

Microsoft Academic Search

Real-time video processing is a rapidly evolving field with growing applications in science and engineering. Portable video processing systems require design which reduces the power, memory usage, and resource utilization while maintaining real-time operation. General system architecture for real-time video filtering and overlay character generation, based on a Field Programmable Gate Array (FPGA) is presented and evaluated. After initial configuration

Babu T Chacko; Siddharth Shelly

2010-01-01

61

Joint-source-channel coding scheme for scalable video-coding-based digital video broadcasting, second generation satellite broadcasting system  

NASA Astrophysics Data System (ADS)

We propose a joint-source-channel coding (JSCC) scheme that can provide and sustain high-quality video service in spite of deteriorated transmission channel conditions of the second generation of the digital video broadcasting (DVB-S2) satellite broadcasting service. Especially by combining the layered characteristics of the SVC (scalable video coding) video and the robust channel coding capability of LDPC (low-density parity check) employed for DVB-S2, a new concept of JSCC for digital satellite broadcasting service is developed. Rain attenuation in high-frequency bands such as the Ka band is a major factor for lowering the link capacity in satellite broadcasting service. Therefore, it is necessary to devise a new technology to dynamically manage the rain attenuation by adopting a JSCC scheme that can apply variable code rates for both source and channel coding. For this purpose, we develop a JSCC scheme by combining SVC and LDPC, and prove the performance of the proposed JSCC scheme by extensive simulations where SVC coded video is transmitted over various error-prone channels with AWGN (additive white Gaussian noise) patterns in DVB-S2 broadcasting service.

Seo, Kwang-Deok; Chi, Won Sup; Lee, In Ki; Chang, Dae-Ig

2010-10-01

62

I tube, you tube, everybody tubes: analyzing the world's largest user generated content video system  

Microsoft Academic Search

User Generated Content (UGC) is re-shaping the way people watch video and TV, with millions of video producers and consumers. In particular, UGC sites are creating new view- ing patterns and social interactions, empowering users to be more creative, and developing new business opportunities. To better understand the impact of UGC systems, we have analyzed YouTube, the world's largest UGC

Meeyoung Cha; Haewoon Kwak; Pablo Rodriguez; Yong-yeol Ahn; Sue Moon

2007-01-01

63

Microsoft Research and academics use video game inspired courses to lure next generation of computer scientists.  

E-print Network

Microsoft Research and academics use video game inspired courses to lure next generation: video games. To reach new students, some educators are turning to inventive and often un- conventional to implementing the gaming courses, but across the board they've seen major improvements in the rates

Narasayya, Vivek

64

Teaching French Transformational Grammar by Means of Computer-Generated Video-Tapes.  

ERIC Educational Resources Information Center

This paper describes a pilot program in an integrated media presentation of foreign languages and the production and usage of seven computer-generated video tapes which demonstrate various aspects of French syntax. This instructional set could form the basis for CAI lessons in which the student is presented images identical to those on the video

Adler, Alfred; Thomas, Jean Jacques

65

I Tube, You Tube, Everybody Tubes: Analyzing the World's Largest User Generated Content Video System  

E-print Network

or classroom use is granted without fee provided that copies are not made or distributed for profit. The advent of user-generated content (UGC) has re-shaped the online video market enormously. Nowadays, and decentralization of the UGC videos make traditional content popularity prediction un- suitable. UGC popularity

Moon, Sue B.

66

Next Generation NASA GA Advanced Concept  

NASA Technical Reports Server (NTRS)

Not only is the common dream of frequent personal flight travel going unfulfilled, the current generation of General Aviation (GA) is facing tremendous challenges that threaten to relegate the Single Engine Piston (SEP) aircraft market to a footnote in the history of U.S. aviation. A case is made that this crisis stems from a generally low utility coupled to a high cost that makes the SEP aircraft of relatively low transportation value and beyond the means of many. The roots of this low value are examined in a broad sense, and a Next Generation NASA Advanced GA Concept is presented that attacks those elements addressable by synergistic aircraft design.

Hahn, Andrew S.

2006-01-01

67

ADVANCED SECOND GENERATION CERAMIC CANDLE FILTERS  

Microsoft Academic Search

Through sponsorship from the Department of Energy's National Energy Technology Laboratory (DOE\\/NETL), development and manufacture of advanced second generation candle filters was undertaken in the early 1990's. Efforts were primarily focused on the manufacture of fracture toughened, 1.5 m, continuous fiber ceramic composite (CFCC) and filament wound candle filters by 3M, McDermott, DuPont Lanxide Composites, and Techniweave. In order to

M. A. Alvin

2002-01-01

68

Video decision support tool for advance care planning in dementia: randomised controlled trial  

Microsoft Academic Search

Objective To evaluate the effect of a video decision support tool on the preferences for future medical care in older people if they develop advanced dementia, and the stability of those preferences after six weeks.Design Randomised controlled trial conducted between 1 September 2007 and 30 May 2008. Setting Four primary care clinics (two geriatric and two adult medicine) affiliated with

Angelo E Volandes; Michael K Paasche-Orlow; Michael J Barry; Muriel R Gillick; Kenneth L Minaker; Yuchiao Chang; E Francis Cook; Elmer D Abbo; Areej El-Jawahri; Susan L Mitchell

2009-01-01

69

Department Name: Office of Academic Services Org. #: 2016 Position Title: Advanced Social Media/Video  

E-print Network

Department Name: Office of Academic Services Org. #: 2016 Position Title: Advanced Social Media/Video WLS Levels: 3 -- 4 Position Codes: S43226 , S43227 Contract Hours: As defined by the status form and positions to be more than the minimum 10 hour commitment; if so, the Status Form will reflect

Baltisberger, Jay H.

70

Learning video browsing behavior and its application in the generation of video previews  

Microsoft Academic Search

With more and more streaming media servers becoming commonplace, streaming video has now become a popular medium of instruction, advertisement, and entertainment. With such prevalence comes a new challenge to the servers: Can they track browsing behavior of users to determine what interest users? Learning this information is potentially valuable not only for improved customer tracking and context-sensitive e-commerce, but

Tanveer Fathima Syeda-Mahmood; Dulce B. Ponceleon

2001-01-01

71

Implementation of Generative Learning Principles in Interactive Video Using Repurpose Video Materials.  

ERIC Educational Resources Information Center

Describes how instructional television and other existing videos can be repurposed to develop theory-based interactive videodiscs. Barriers to videodisc use in education are discussed; and two models are described that integrate curriculum theory and cognitive learning theory in the creation of social studies and foreign language curriculum…

Cambre, Marjorie A.; And Others

1992-01-01

72

Automatic Content Generation in the Galactic Arms Race Video Game  

Microsoft Academic Search

Simulation and game content includes the levels, models, textures, items, and other objects encountered and possessed by players during the game. In most modern video games and in simulation software, the set of content shipped with the product is static and unchanging, or at best, randomized within a narrow set of parameters. However, ideally, if game content could be constantly

Erin Jonathan Hastings; Ratan K. Guha; Kenneth O. Stanley

2009-01-01

73

ADVANCED SECOND GENERATION CERAMIC CANDLE FILTERS  

SciTech Connect

Through sponsorship from the Department of Energy's National Energy Technology Laboratory (DOE/NETL), development and manufacture of advanced second generation candle filters was undertaken in the early 1990's. Efforts were primarily focused on the manufacture of fracture toughened, 1.5 m, continuous fiber ceramic composite (CFCC) and filament wound candle filters by 3M, McDermott, DuPont Lanxide Composites, and Techniweave. In order to demonstrate long-term thermal, chemical, and mechanical stability of the advanced second generation candle filter materials, Siemens Westinghouse initiated high temperature, bench-scale, corrosion testing of 3M's CVI-SiC and DuPont's PRD-66 mini-candles, and DuPont's CFCC SiC-SiC and IF&P Fibrosic{sup TM} coupons under simulated, pressurized fluidized-bed combustion (PFBC) conditions. This effort was followed by an evaluation of the mechanical and filtration performance of the advanced second generation filter elements in Siemens Westinghouse's bench-scale PFBC test facility in Pittsburgh, Pennsylvania. Arrays of 1.4-1.5 m 3M CVI-SiC, DuPont PRD-66, DuPont SiC-SiC, and IF&P Fibrosic{sup TM} candles were subjected to steady state process operating conditions, increased severity thermal transients, and accelerated pulse cycling test campaigns which represented {approx}1760 hours of equivalent filter operating life. Siemens Westinghouse subsequently participated in early material surveillance programs which marked entry of the 3M CVI-SiC and DuPont PRD-66 candle filters in Siemens Westinghouse Advanced Particulate Filtration (APF) system at the American Electric Power (AEP) Tidd Demonstration Plant in Brilliant, Ohio. Siemens Westinghouse then conducted an extended, accelerated life, qualification program, evaluating the performance of the 3M, McDermott, and Techniweave oxide-based CFCC filter elements, modified DuPont PRD-66 elements, and the Blasch, Scapa Cerafil{sup TM}, and Specific Surface monolithic candles for use in the APF system at the Foster Wheeler pressurized circulating fluidized-bed combustion (PCFBC), pilot-scale, test facility in Karhula, Finland. This report presents a summary of these efforts, defining the stability of the various porous ceramic filter materials, as well as component performance and extended life for use in advanced coal-based power systems.

M.A. Alvin

2002-01-31

74

Omnifocus video camera  

NASA Astrophysics Data System (ADS)

The omnifocus video camera takes videos, in which objects at different distances are all in focus in a single video display. The omnifocus video camera consists of an array of color video cameras combined with a unique distance mapping camera called the Divcam. The color video cameras are all aimed at the same scene, but each is focused at a different distance. The Divcam provides real-time distance information for every pixel in the scene. A pixel selection utility uses the distance information to select individual pixels from the multiple video outputs focused at different distances, in order to generate the final single video display that is everywhere in focus. This paper presents principle of operation, design consideration, detailed construction, and over all performance of the omnifocus video camera. The major emphasis of the paper is the proof of concept, but the prototype has been developed enough to demonstrate the superiority of this video camera over a conventional video camera. The resolution of the prototype is high, capturing even fine details such as fingerprints in the image. Just as the movie camera was a significant advance over the still camera, the omnifocus video camera represents a significant advance over all-focus cameras for still images.

Iizuka, Keigo

2011-04-01

75

ADVANCED CO2 CYCLE POWER GENERATION  

SciTech Connect

Research is being conducted under United States Department of Energy (DOE) Contract DE-FC26-02NT41621 to develop a conceptual design and determine the performance characteristics of a new IGCC plant configuration that facilitates CO{sub 2} removal for sequestration. This new configuration will be designed to achieve CO{sub 2} sequestration without the need for water gas shifting and CO{sub 2} separation, and may eliminate the need for a separate sequestration compressor. This research introduces a novel concept of using CO{sub 2} as a working fluid for an advanced coal gasification based power generation system, where it generates power with high system efficiency while concentrating CO{sub 2} for sequestration. This project supports the DOE research objective of development of concepts for the capture and storage of CO{sub 2}.

A. Nehrozoglu

2004-01-01

76

ADVANCED CO2 CYCLE POWER GENERATION  

SciTech Connect

Research is being conducted under United States Department of Energy (DOE) Contract DE-FC26-02NT41621 to develop a conceptual design and determine the performance characteristics of a new IGCC plant configuration that facilitates CO{sub 2} removal for sequestration. This new configuration will be designed to achieve CO{sub 2} sequestration without the need for water gas shifting and CO{sub 2} separation, and may eliminate the need for a separate sequestration compressor. This research introduces a novel concept of using CO{sub 2} as a working fluid for an advanced coal gasification based power generation system, where it generates power with high system efficiency while concentrating CO{sub 2} for sequestration. This project supports the DOE research objective of development of concepts for the capture and storage of CO{sub 2}.

A. Nehrozoglu

2003-10-01

77

Structured student-generated videos for first-year students at a dental school in Malaysia.  

PubMed

Student-generated videos provide an authentic learning experience for students, enhance motivation and engagement, improve communication skills, and improve collaborative learning skills. This article describes the development and implementation of a student-generated video activity as part of a knowledge, observation, simulation, and experience (KOSE) program at the School of Dentistry, International Medical University, Kuala Lumpur, Malaysia. It also reports the students' perceptions of an activity that introduced first-year dental students (n=44) to clinical scenarios involving patients and dental team aiming to improve professional behavior and communication skills. The learning activity was divided into three phases: preparatory phase, video production phase, and video-watching. Students were organized into five groups and were instructed to generate videos addressing given clinical scenarios. Following the activity, students' perceptions were assessed with a questionnaire. The results showed that 86 percent and 88 percent, respectively, of the students agreed that preparation of the activity enhanced their understanding of the role of dentists in provision of health care and the role of enhanced teamwork. In addition, 86 percent and 75 percent, respectively, agreed that the activity improved their communication and project management skills. Overall, the dental students perceived that the student-generated video activity was a positive experience and enabled them to play the major role in driving their learning process. PMID:23658411

Omar, Hanan; Khan, Saad A; Toh, Chooi G

2013-05-01

78

Real-time compressed video ultrasound using the Advanced Communications Technology Satellite  

NASA Astrophysics Data System (ADS)

The authors have an in-kind grant from NASA to investigate the application of the Advanced Communications Technology Satellite (ACTS) to teleradiology and telemedicine using the Jet Propulsion Laboratory developed ACTS Mobile Terminal (AMT) uplink. We have recently completed three series of experiments with the ACTS/AMT. Although these experiments were multifaceted, the primary objective was the determination and evaluation of transmitting real- time compressed ultrasound video imagery over the ACTS/AMT satellite link, a primary focus of the author's current ARPA Advanced Biomedical Technology contract. These experiments have demonstrated that real-time compressed ultrasound video imagery can be transmitted over multiple ISDN line bandwidth links with sufficient temporal, contrast and spatial resolution for clinical diagnosis of multiple disease and pathology states to provide subspecialty consultation and education at a distance.

Stewart, Brent K.; Carter, Stephen J.; Cook, Jay F.; Abbe, Brian S.; Pinck, Deborah; Rowberg, Alan H.

1996-05-01

79

X-Ray Calibration Facility/Advanced Video Guidance Sensor Test  

NASA Technical Reports Server (NTRS)

The advanced video guidance sensor was tested in the X-Ray Calibration facility at Marshall Space Flight Center to establish performance during vacuum. Two sensors were tested and a timeline for each are presented. The sensor and test facility are discussed briefly. A new test stand was also developed. A table establishing sensor bias and spot size growth for several ranges is detailed along with testing anomalies.

Johnston, N. A. S.; Howard, R. T.; Watson, D. W.

2004-01-01

80

A platform-based MPEG4 advanced video coding (AVC) decoder with block level pipelining  

Microsoft Academic Search

We present a baseline MPEG-4 AVC (advanced video coding) decoder based on an optimized platform-based design methodology. With this methodology, we jointly optimize the software and hardware design of the decoder. Overall decoding throughput is increased by synchronizing the software and the dedicated co-processors. The synchronization is achieved at macroblock-level pipelining. In addition, we optimize the decoder software by enhancing

Shih-Hao Wang; Wen-Hsiao Peng; Yuwen He; Guan-Yi Lin; Chen-Yi Lin; Shih-Chien Chang; Chung-Neng Wang; Tihao Chiang

2003-01-01

81

Computer-generated holograms of a real three-dimensional object based on stereoscopic video images  

NASA Astrophysics Data System (ADS)

A novel method of using stereoscopic video images to synthesize the computer-generated hologram (CGH) patterns of a real 3D object is proposed. Stereoscopic video images of a real 3D object are captured by a 3D camera system. Disparity maps between the captured stereo image pairs are estimated and from these estimated maps the depth data for each pixel of the object can be extracted on a frame basis. By using these depth data and original color images, hologram patterns of a real object can be computationally generated. In experiments, stereoscopic video images of a real 3D object, a wooden rhinoceros doll, are captured by using the Wasol 3D adapter system and its depth data are extracted from them. Then, CGH patterns of 1280 pixels × 1024 pixels are generated with these depth-annotated images of the wooden rhinoceros doll, and the CGH patterns are experimentally displayed via a holographic display system.

Kim, Seung-Cheol; Hwang, Dong-Choon; Lee, Dong-Hwi; Kim, Eun-Soo

2006-08-01

82

Building Next Generation Video Game Collections in Academic Libraries  

ERIC Educational Resources Information Center

Most academic libraries do not yet have gaming collections, let alone gaming services and facilities that support the unique and growing teaching and research needs of campus environments. Academic libraries in particular need to start thinking about developing the next generation of gaming collections and services. This article examines the…

Laskowski, Mary; Ward, David

2009-01-01

83

GENERATING SEAMLESS STEREO MOSAICS FROM AERIAL VIDEO Zhigang Zhu, Allen R. Hanson, Harpal S. Bassali  

E-print Network

in the coming decades will be how to manage the use of land and natural resources. Unfortunately, the use biomass of forests. The instrumentation package mounted on an airplane consists of two bore­sighted video interface are clearly necessary. Automatically generated mosaics of forests that are both geo

Zhu, Zhigang

84

PHYSIOLOGICALLY-BASED DETECTION OF COMPUTER GENERATED FACES IN VIDEO V. Conotter, E. Bodnari, G. Boato  

E-print Network

. Boato Department of Information Engineering and Computer Science University of Trento, Trento (ITALY) H. Farid Dartmouth College Department of Computer Science Hanover NH 03755 (USA) ABSTRACT We describe a new forensic technique for distinguishing be- tween computer generated and human faces in video

Farid, Hany

85

Generating Ball Trajectory in Soccer Video Sequences Jinchang Ren1,2  

E-print Network

Generating Ball Trajectory in Soccer Video Sequences Jinchang Ren1,2 , James Orwell3 , Graeme A.jones}@kingston.ac.uk Abstract. This paper demonstrates innovative techniques for estimating the tra- jectory of a soccer ball-D/3-D reconstruction and visuali- zation [4-9]. In a soccer match the ball is invariably the focus

Jones, Graeme A.

86

Can Video Games Enhance Creativity? Effects of Emotion Generated by Dance Dance Revolution  

Microsoft Academic Search

What role does emotion play in helping youth reach their creative potential? Does it alter how they process ideas, and how many ideas they can generate? By varying the levels of arousal associated with low, medium, and high levels of exertion in the video game Dance Dance Revolution, and inducing a positive or negative mood, this study offers evidence that

Elizabeth Hutton; S. Shyam Sundar

2010-01-01

87

Rapid generation of sports video highlights using the MPEG-7 motion activity descriptor  

NASA Astrophysics Data System (ADS)

We present a technique for rapidly generating highlights of sports videos using temporal patterns of motion activity extracted in the compressed domain. The basic hypothesis of this work is that temporal patterns of motion activity are related with the grammar of the sports video. We present experimental verification of this hypothesis. By using very simple rules depending on the type of sport, we are thus able to provide highlights by skipping over the uninteresting parts of the video and identifying interesting events characterized, for instance, by falling edge or raising edge in the activity domain. Moreover the compressed domain extraction of motion activity intensity is much simpler than the color based summarization calculations. Other compressed domain features or more complex rules can be used to further improve the accuracy.

Peker, Kadir A.; Cabasson, Romain; Divakaran, Ajay

2001-12-01

88

A QUALITY-OF-EXPERIENCE DRIVEN BIDDING GAME FOR UPLINK VIDEO TRANSMISSION IN NEXT GENERATION MOBILE NETWORKS  

E-print Network

A QUALITY-OF-EXPERIENCE DRIVEN BIDDING GAME FOR UPLINK VIDEO TRANSMISSION IN NEXT GENERATION MOBILE propose a Quality of Experience (QoE) driven bidding game for de-centralized uplink resource allocation among multiple mobile video producers. Different from previous works, the price per resource unit

Steinbach, Eckehard

89

Parallel Parity Checksum and Syndrome Generation for Digital Video and Audio Transmission over Cable Channel  

NASA Astrophysics Data System (ADS)

The ITU-T J.83 Annex B is a widely adopted standard in North America for digital video and audio transmission over coaxial cable. This paper proposes a new parallel processing architecture of the parity checksum generator and syndrome generator specified in the standard for packet synchronization and error detection. The proposed parallel processing architecture removes the performance bottleneck occurring in the conventional serial processing architecture, leading to significant decrease in processing time for generating a parity checksum in transmitter and a syndrome in receiver. Implementation results show that the proposed parallel processing architecture reduces the processing time by 92% for parity checksum generation and by 81% for syndrome generation over the conventional serial processing architecture.

Hong, Eonpyo; Jung, Eungu; Hong, Junhee; Yim, Jaewon; Har, Dongsoo

90

ADVANCED DTM GENERATION FROM LIDAR DATA  

Microsoft Academic Search

The introduction of laser scanning has triggered o a revolution in topographic terrain capturing, especially in the generation of digital terrain models (DTM). In this article refined methods for the restitution of airborne LIDAR data are presented which have been developed at the Institute of Photogrammetry and Remote Sensing (Institut fur Photogrammetrie und Fernerkundung, I.P.F.) at Vienna University of Technology.

K. Kraus; N. Pfeifer

2001-01-01

91

Fast generation of computer-generated Fresnel hologram at video frame rate.  

E-print Network

???Computer-generated holography (CGH) is a technique of digitally generating holograms from real-world or synthetic three-dimensional (3D) objects with numerical computation. However, direct calculation, generally referred… (more)

Cheung, Wai-keung (???)

2012-01-01

92

Recent advances in unstructured grid generation program VGRID3D  

NASA Technical Reports Server (NTRS)

A program for the generation of unstructured grids over complex configurations, VGRID3D, is described. The grid elements (triangles on the surfaces and tetrahedra in the field) are generated starting from the surface boundaries towards the interior of the computational domain using the Advancing Front Method.

Parikh, Paresh; Pirzadeh, Shahyar

1992-01-01

93

Abstract--Due to advances of network technologies, it has become practical to stream the stored video over Internet. Because the video stream is in a compressed format, it is naturally with the variable bit rate (VBR)  

E-print Network

video over Internet. Because the video stream is in a compressed format, it is naturally proxy. I. INTRODUCTION With advances in broadband technologies, it has gained in popularity to provide the Internet. The Internet architecture is heterogeneous and it consists of many Internet service providers

Chen, Sheng-Wei

94

Fast thumbnail generation for MPEG video by using a multiple-symbol lookup table  

NASA Astrophysics Data System (ADS)

A novel method using a multiple-symbol lookup table (mLUT) is proposed to fast-skip the ac coefficients (codewords) not needed to construct a dc image from MPEG-1/2 video streams, resulting in fast thumbnail generation. For MPEG-1/2 video streams, thumbnail generation schemes usually extract dc images directly in a compressed domain where a dc image is constructed using a dc coefficient and a few ac coefficients from among the discrete cosine transform (DCT) coefficients. However, it is required that all codewords for DCT coefficients should be fully decoded whether they are needed or not in generating a dc image, since the bit length of a codeword coded with variable-length coding (VLC) cannot be determined until the previous VLC codeword has been decoded. Thus, a method using a mLUT designed for fast-skipping unnecessary DCT coefficients to construct a dc image is proposed, resulting in a significantly reduced number of table lookups (LUT count) for variable-length decoding of codewords. Experimental results show that the proposed method significantly improves the performance by reducing the LUT count by 50%.

Kim, Myounghoon; Lee, Hoonjae; Yoon, Ja-Cheon; Kim, Hyeokman; Sull, Sanghoon

2009-03-01

95

Artificial Video for Video Analysis  

ERIC Educational Resources Information Center

This paper discusses the use of video analysis software and computer-generated animations for student activities. The use of artificial video affords the opportunity for students to study phenomena for which a real video may not be easy or even possible to procure, using analysis software with which the students are already familiar. We will…

Gallis, Michael R.

2010-01-01

96

Thoracic metastasis in advanced ovarian cancer: comparison between computed tomography and video-assisted thoracic surgery  

PubMed Central

Objective To determine which computed tomography (CT) imaging features predict pleural malignancy in patients with advanced epithelial ovarian carcinoma (EOC) using video-assisted thoracic surgery (VATS), pathology, and cytology findings as the reference standard. Methods This retrospective study included 44 patients with International Federation of Obstetrics and Gynecology (FIGO) stage III or IV primary or recurrent EOC who had chest CT ?30 days before VATS. Two radiologists independently reviewed the CT studies and recorded the presence and size of pleural effusions and of ascites; pleural nodules, thickening, enhancement, subdiaphragmatic tumour deposits and supradiaphragmatic, mediastinal, hilar, and retroperitoneal adenopathy; and peritoneal seeding. VATS, pathology, and cytology findings constituted the reference standard. Results In 26/44 (59%) patients, pleural biopsies were malignant. Only the size of left-sided pleural effusion (reader 1: rho=-0.39, p=0.01; reader 2: rho=-0.37, p=0.01) and presence of ascites (reader 1: rho=-0.33, p=0.03; reader 2: rho=-0.35, p=0.03) were significantly associated with solid pleural metastasis. Pleural fluid cytology was malignant in 26/35 (74%) patients. Only the presence (p=0.03 for both readers) and size (reader 1: rho=0.34, p=0.04; reader 2: rho=0.33, p=0.06) of right-sided pleural effusion were associated with malignant pleural effusion. Interobserver agreement was substantial (kappa=0.78) for effusion size and moderate (kappa=0.46) for presence of solid pleural disease. No other CT features were associated with malignancy at biopsy or cytology. Conclusion In patients with advanced EOC, ascites and left-sided pleural effusion size were associated with solid pleural metastasis, while the presence and size of right-sided effusion were associated with malignant pleural effusion. No other CT features evaluated were associated with pleural malignancy. PMID:22247803

Mironov, Oleg; Sala, Evis; Mironov, Svetlana; Pannu, Harpreet; Chi, Dennis S.

2011-01-01

97

Characterization of the MPEG2 video traffic generated by DVD applications  

Microsoft Academic Search

There is growing interest in applications using video information, as for example real-time full-motion video or VoD systems. Many modern applications use MPEG standard for video signal coding. Nowadays, the standard becomes the most frequently used compression method for storing (DVD, CD-video, etc.) and transmitting multimedia data. We present characterization of high quality MPEG-2 video, stored on DVD disc. We

Agnieszka CHODOREK; Robert R. CHODOREK

2000-01-01

98

Creating next generation blended learning environments using mixed reality, Video Games and Simulations  

Microsoft Academic Search

Summary  The goal of this article has been to discuss next generation learning environments and next generation training technologies\\u000a as well as the learning and design challenges faced in using these. Specifically, we discuss theoretical and design principles\\u000a of constructivist learning environments and how advanced technologies can potentially support meeting these principles as\\u000a well as the challenges they may pose to

Sonny E. Kirkley; Jamie R. Kirkley

2004-01-01

99

Advances in understanding cancer genomes through second-generation sequencing  

Microsoft Academic Search

Cancers are caused by the accumulation of genomic alterations. Therefore, analyses of cancer genome sequences and structures provide insights for understanding cancer biology, diagnosis and therapy. The application of second-generation DNA sequencing technologies (also known as next-generation sequencing) — through whole-genome, whole-exome and whole-transcriptome approaches — is allowing substantial advances in cancer genomics. These methods are facilitating an increase in

Stacey Gabriel; Gad Getz; Matthew Meyerson

2010-01-01

100

Advanced instrumentation for next-generation aerospace propulsion control systems  

NASA Technical Reports Server (NTRS)

New control concepts for the next generation of advanced air-breathing and rocket engines and hypersonic combined-cycle propulsion systems are analyzed. The analysis provides a database on the instrumentation technologies for advanced control systems and cross matches the available technologies for each type of engine to the control needs and applications of the other two types of engines. Measurement technologies that are considered to be ready for implementation include optical surface temperature sensors, an isotope wear detector, a brushless torquemeter, a fiberoptic deflectometer, an optical absorption leak detector, the nonintrusive speed sensor, and an ultrasonic triducer. It is concluded that all 30 advanced instrumentation technologies considered can be recommended for further development to meet need of the next generation of jet-, rocket-, and hypersonic-engine control systems.

Barkhoudarian, S.; Cross, G. S.; Lorenzo, Carl F.

1993-01-01

101

Video Technology to Advance Safety in the Operating Room and Perioperative Environment  

Microsoft Academic Search

Video is a powerful medium and is underused for patient safety in several areas: education, real-time consultation, process improvement, research, and workflow coordina- tion. We illustrate this point through an overview of uses of video in health care by the authors and others in several institutions. These uses were in the context of team work training, operating room coordination, tech-

Yan Xiao; Stephen Schimpff; Colin Mackenzie; Ronald Merrell; Eileen Entin; Roger Voigt; Bruce Jarrell

102

KAN NA! Authentic Chinese Video. Lessons for Intermediate to Advanced Self-Study. [CD-ROM].  

ERIC Educational Resources Information Center

This compact disc (CD) offers 20 lessons based on selected Chinese language video clips. Filmed on location in Beijing, these naturalistic video clips consist mainly of unrehearsed interviews with ordinary people. The learner is lead through a series of activities aiding comprehension and learning that sharpen communication strategies and…

Fleming, Stephen; Hiple, David; Ning, Cynthia

103

Polarization-modulated second harmonic generation ellipsometric microscopy at video rate.  

PubMed

Fast 8 MHz polarization modulation coupled with analytical modeling, fast beam-scanning, and synchronous digitization (SD) have enabled simultaneous nonlinear optical Stokes ellipsometry (NOSE) and polarized laser transmittance imaging with image acquisition rates up to video rate. In contrast to polarimetry, in which the polarization state of the exiting beam is recorded, NOSE enables recovery of the complex-valued Jones tensor of the sample that describes all polarization-dependent observables of the measurement. Every video-rate scan produces a set of 30 images (10 for each detector with three detectors operating in parallel), each of which corresponds to a different polarization-dependent result. Linear fitting of this image set contracts it down to a set of five parameters for each detector in second harmonic generation (SHG) and three parameters for the transmittance of the incident beam. These parameters can in turn be used to recover the Jones tensor elements of the sample. Following validation of the approach using z-cut quartz, NOSE microscopy was performed for microcrystals of both naproxen and glucose isomerase. When weighted by the measurement time, NOSE microscopy was found to provide a substantial (>7 decades) improvement in the signal-to-noise ratio relative to our previous measurements based on the rotation of optical elements and a 3-fold improvement relative to previous single-point NOSE approaches. PMID:25050448

DeWalt, Emma L; Sullivan, Shane Z; Schmitt, Paul D; Muir, Ryan D; Simpson, Garth J

2014-08-19

104

Fabrication of Advanced Thermoelectric Materials by Hierarchical Nanovoid Generation  

NASA Technical Reports Server (NTRS)

A novel method to prepare an advanced thermoelectric material has hierarchical structures embedded with nanometer-sized voids which are key to enhancement of the thermoelectric performance. Solution-based thin film deposition technique enables preparation of stable film of thermoelectric material and void generator (voigen). A subsequent thermal process creates hierarchical nanovoid structure inside the thermoelectric material. Potential application areas of this advanced thermoelectric material with nanovoid structure are commercial applications (electronics cooling), medical and scientific applications (biological analysis device, medical imaging systems), telecommunications, and defense and military applications (night vision equipments).

Choi, Sang Hyouk (Inventor); Park, Yeonjoon (Inventor); Chu, Sang-Hyon (Inventor); Elliott, James R. (Inventor); King, Glen C. (Inventor); Kim, Jae-Woo (Inventor); Lillehei, Peter T. (Inventor); Stoakley, Diane M. (Inventor)

2011-01-01

105

Development of a flexible video analysis system for motion detection and alarm generation  

Microsoft Academic Search

This paper aims at developing a flexible video analysis system that can be used in wide range of video surveillance applications as well as to detect the human being. The developed system is called here as Smart Video Analysis System. This SVAS is able to detect and track interested objects. It can also detect people and recognize their activities in

A. A. Shafie; F. Hafiz; M. H. Ali; R. M. Ali

2010-01-01

106

Picturing Video  

NASA Technical Reports Server (NTRS)

Video Pics is a software program that generates high-quality photos from video. The software was developed under an SBIR contract with Marshall Space Flight Center by Redhawk Vision, Inc.--a subsidiary of Irvine Sensors Corporation. Video Pics takes information content from multiple frames of video and enhances the resolution of a selected frame. The resulting image has enhanced sharpness and clarity like that of a 35 mm photo. The images are generated as digital files and are compatible with image editing software.

2000-01-01

107

Cefdinir: An advanced-generation, broad-spectrum oral cephalosporin  

Microsoft Academic Search

Background: Cefdinir is an advanced-generation, broad-spectrum cephalosporin antimicrobial agent that has been approved for the treatment of community-acquired pneumonia, acute bacterial exacerbations of chronic bronchitis, acute maxillary sinusitis, pharyngitis\\/tonsillitis, acute bacterial otitis media, and uncomplicated skin and skin-structure infections in adult and pediatric patients.Objective: The purpose of this article was to review the in vitro antimicrobial activity, pharmacokinetics, clinical efficacy,

David R. P. Guay

2002-01-01

108

Advanced nanoparticle generation and excitation by lasers in liquids.  

PubMed

Today, nanoparticles are widely implemented as functional elements onto surfaces, into volumes and as nano-hybrids, resulting for example in bioactive composites and biomolecule conjugates. However, only limited varieties of materials compatible for integration into advanced functional materials are available: nanoparticles synthesized using conventional gas phase processes are often agglomerated into micro powders that are hard to re-disperse into functional matrices. Chemical synthesis methods often lead to impurities of the nanoparticle colloids caused by additives and precursor reaction products. In the last decade, laser ablation and nanoparticle generation in liquids has proven to be a unique and efficient technique to generate, excite, fragment, and conjugate a large variety of nanostructures in a scalable and clean manner. This editorial briefly highlights selected recent advancements and critical aspects in the field of pulsed laser-based nanoparticle generation and manipulation, including exemplary strategies to harvest the unique properties of the laser-generated nanomaterials in the field of biomedicine and catalysis. The presented critical aspects address future assignments such as size control and scale-up. PMID:23138867

Barcikowski, Stephan; Compagnini, Giuseppe

2013-03-01

109

Proc. IEEE Int. Conf. on Advanced Video and Signal Based Surveillance, Como, Italy, September 2005 Tracking Motion Objects in Infrared Videos  

E-print Network

Tracking Motion Objects in Infrared Videos Longin Jan Latecki1 , Roland Miezianko1 , Dragoljub Pokrajac2 1@desu.edu Abstract We propose motion detection and object tracking method that is particularly suitable for infrared videos. Detection of moving objects in infrared videos is based on changing texture in parts of the view

Latecki, Longin Jan

110

The Effects of Technological Advancement and Violent Content in Video Games on Players? Feelings of Presence, Involvement, Physiological Arousal, and Aggression  

Microsoft Academic Search

The possible impact of technological advancement on video games' effects—particularly in the case of violent games—has often been discussed but has not been thoroughly explored by empirical research. The present investigation employed a 2 3 2 between- subjects factorial experiment to examine the interplay of technological advancement and violence by exposing participants (N = 120) to either a newer or

James D. Ivory; Sriram Kalyanaraman

2007-01-01

111

YouTube as a Qualitative Research Asset: Reviewing User Generated Videos as Learning Resources  

ERIC Educational Resources Information Center

YouTube, the video hosting service, offers students, teachers, and practitioners of qualitative researchers a unique reservoir of video clips introducing basic qualitative research concepts, sharing qualitative data from interviews and field observations, and presenting completed research studies. This web-based site also affords qualitative…

Chenail, Ronald J.

2011-01-01

112

Methodologies for generating HTTP streaming video workloads to evaluate web server performance  

Microsoft Academic Search

Recent increases in live and on-demand video streaming have dramatically changed the Internet landscape. In North America, Netflix alone accounts for 28% of all and 33% of peak downstream Internet traffic on fixed access links, with further rapid growth expected [26]. This increase in streaming traffic coincides with the steady adoption of HTTP for use in video streaming. Many streaming

Jim Summers; Tim Brecht; Derek Eager; Bernard Wong

2012-01-01

113

Identifying Individuals in Video by Combining `Generative' and Discriminative Head Models  

E-print Network

- tecting and identifying three characters and their poses in a TV situation comedy. 1. Introduction for this is twofold: firstly, we want to annotate video material, such as situation comedies and feature films material, including news footage and home videos, but here we present results on detecting characters

Kim, Tae-Kyun

114

Multi-View Video: Get Ready for Next-Generation Television  

Microsoft Academic Search

Many believe that multi-view video is poised to change how people watch television and that it could become a driving force in interactive multimedia entertainment, for both desktop and mobile environments. An MVV system acquires several video sequences of the same scene simultaneously from more than one angle and transports these streams remotely. Scenes can be displayed interactively, letting the

Ishfaq Ahmad

2007-01-01

115

The Effect of Advances in Video Game Technology and Content on Aggressive Cognitions, Hostility, and Heart Rate  

Microsoft Academic Search

Two studies were conducted that tested the moderating role of video game graphics quality in the relationship between video game content and aggression-related variables. In both studies, participants played either a violent or nonviolent video game on one of three video game systems with differing technological computing power (which contributes to the realism depicted in these video games). In Study

Christopher Barlett; Christopher D. Rodeheffer; Ross Baldassaro; Michael P. Hinkin; Richard J. Harris

2008-01-01

116

Advanced controlled series compensated self excited induction generator  

SciTech Connect

The dynamic reactive power (VAR) requirements limits the applications of self excited induction generator (SEIG), because of poor voltage regulation even at constant speeds. Fixed and varying reactive power compensators with conventional devices such as synchronous condenser, shunt capacitor, series capacitors have inherent problems like sluggish response, undue over-voltage, switching transients, sub-synchronous resonance, etc. In this paper application of advanced controlled series compensator (ACSC) for the voltage control of SEIG at different speeds has been discussed. ACSC-SEIG system has been modeled and analyzed. The theoretical results are supported with experimental results to establish the effectiveness of the proposed scheme.

Jain, D.K.; Mittal, A.P. [Regional Engineering Coll., Kurukshetra (India); Singh, B. [Indian Inst. of Tech., New Delhi (India)

1995-12-31

117

Advanced ceramic materials for next-generation nuclear applications  

NASA Astrophysics Data System (ADS)

The nuclear industry is at the eye of a 'perfect storm' with fuel oil and natural gas prices near record highs, worldwide energy demands increasing at an alarming rate, and increased concerns about greenhouse gas (GHG) emissions that have caused many to look negatively at long-term use of fossil fuels. This convergence of factors has led to a growing interest in revitalization of the nuclear power industry within the United States and across the globe. Many are surprised to learn that nuclear power provides approximately 20% of the electrical power in the US and approximately 16% of the world-wide electric power. With the above factors in mind, world-wide over 130 new reactor projects are being considered with approximately 25 new permit applications in the US. Materials have long played a very important role in the nuclear industry with applications throughout the entire fuel cycle; from fuel fabrication to waste stabilization. As the international community begins to look at advanced reactor systems and fuel cycles that minimize waste and increase proliferation resistance, materials will play an even larger role. Many of the advanced reactor concepts being evaluated operate at high-temperature requiring the use of durable, heat-resistant materials. Advanced metallic and ceramic fuels are being investigated for a variety of Generation IV reactor concepts. These include the traditional TRISO-coated particles, advanced alloy fuels for 'deep-burn' applications, as well as advanced inert-matrix fuels. In order to minimize wastes and legacy materials, a number of fuel reprocessing operations are being investigated. Advanced materials continue to provide a vital contribution in 'closing the fuel cycle' by stabilization of associated low-level and high-level wastes in highly durable cements, ceramics, and glasses. Beyond this fission energy application, fusion energy will demand advanced materials capable of withstanding the extreme environments of high-temperature plasma systems. Fusion reactors will likely depend on lithium-based ceramics to produce tritium that fuels the fusion plasma, while high-temperature alloys or ceramics will contain and control the hot plasma. All the while, alloys, ceramics, and ceramic-related processes continue to find applications in the management of wastes and byproducts produced by these processes.

Marra, John

2011-10-01

118

Second generation video imaging technique for assessing dermal exposure (VITAE System).  

PubMed

Development of a second-generation video imaging technique for assessing occupational skin exposure (VITAE) is described, its performance evaluated, and new procedures for exposure quantification are presented. The current VITAE system has higher resolution in regard to both its picture element array and gray scale when compared with the prototype system. System performance was evaluated during extended field deployment: variability was 3-4% during data acquisition for individual worker evaluation session, and 10% over a 22-day study period. Variabilities attributable to subject positioning and image outlining procedures were 2.7 and 1.2%, respectively. Visual observations of fluorescent tracer deposition on skin were used to classify specific body regions as either exposed of unexposed, and two computer-based classification criteria were tested against the visual classification. These criteria were generally better at minimizing false negative and false positive classification; sensitivity and predictive value reached 95 and 99%, respectively, when analysis was preceded by presampling of a subset of images. Variability in skin pigmentation was found to have a substantial effect on fluorescent tracer qualification, leading to development of new calibration procedures. Standard curves were generated by spotting a range of tracer concentrations on volunteer subjects and quantifying fluorescence with the VITAE system. These data were then grouped either by subject or by the magnitude of the background signal of the unexposed skin. The ability to control for the effects of skin pigmentation was found to be comparable for these grouping methods, indicating that calibration curves can be developed without the creation of a unique curve for each subject. PMID:9291561

Fenske, R A; Birnbaum, S G

1997-09-01

119

ADVANCED CO{sub 2} CYCLE POWER GENERATION  

SciTech Connect

Research is being conducted under United States Department of Energy (DOE) Contract DE-FC26-02NT41621 to develop a conceptual design and determine the performance characteristics of a new IGCC plant configuration that facilitates CO{sub 2} removal for sequestration. This new configuration will be designed to achieve CO{sub 2} sequestration without the need for water gas shifting and CO{sub 2} separation, and may eliminate the need for a separate sequestration compressor. This research introduces a novel concept of using CO{sub 2} as a working fluid for an advanced coal gasification based power generation system, where it generates power with high system efficiency while concentrating CO{sub 2} for sequestration. This project supports the DOE research objective of development of concepts for the capture and storage of CO{sub 2}.

A. Nehrozoglu

2003-07-01

120

Video Traffic Analysis of H.264/AVC and Extensions: Single-Layer Statistics  

E-print Network

1 Video Traffic Analysis of H.264/AVC and Extensions: Single-Layer Statistics Geert Van der Auwera and Prasanth T. David and Martin Reisslein I. INTRODUCTION We examine the video traffic generated by the H.264/MPEG­4 Advanced Video Coding (H.264/AVC for brevity) standard [1], also known as H.264/MPEG-4 Part 10

Reisslein, Martin

121

Development of Advanced Stirling Radioisotope Generator for Space Exploration  

NASA Astrophysics Data System (ADS)

Under the joint sponsorship of the Department of Energy and NASA, a radioisotope power system utilizing Stirling power conversion technology is being developed for potential future space missions. The higher conversion efficiency of the Stirling cycle compared with that of Radioisotope Thermoelectric Generators (RTGs) used in previous missions (Viking, Pioneer, Voyager, Galileo, Ulysses, Cassini, and New Horizons) offers the advantage of a four-fold reduction in PuO2 fuel, thereby saving cost and reducing radiation exposure to support personnel. With the advancement of state-of-the-art Stirling technology development under the NASA Research Announcement (NRA) project, the Stirling Radioisotope Generator program has evolved to incorporate the advanced Stirling convertor (ASC), provided by Sunpower, into an engineering unit. Due to the reduced envelope and lighter mass of the ASC compared to the previous Stirling convertor, the specific power of the flight generator is projected to increase from 3.5 We/kg to 7 We/kg, along with a 25% reduction in generator length. Modifications are being made to the ASC design to incorporate features for thermal, mechanical, and electrical integration with the engineering unit. These include the heat collector for hot end interface, cold-side flange for waste heat removal and structural attachment, and piston position sensor for ASC control and power factor correction. A single-fault tolerant, active power factor correction controller is used to synchronize the Stirling convertors, condition the electrical power from AC to DC, and to control the ASCs to maintain operation within temperature and piston stroke limits. Development activities at Sunpower and NASA Glenn Research Center (GRC) are also being conducted on the ASC to demonstrate the capability for long life, high reliability, and flight qualification needed for use in future missions.

Chan, Jack; Wood, J. Gary; Schreiber, Jeffrey G.

2007-01-01

122

Advancing the Next Generation of Health Risk Assessment  

PubMed Central

Background: Over the past 20 years, knowledge of the genome and its function has increased dramatically, but risk assessment methodologies using such knowledge have not advanced accordingly. Objective: This commentary describes a collaborative effort among several federal and state agencies to advance the next generation of risk assessment. The objective of the NexGen program is to begin to incorporate recent progress in molecular and systems biology into risk assessment practice. The ultimate success of this program will be based on the incorporation of new practices that facilitate faster, cheaper, and/or more accurate assessments of public health risks. Methods: We are developing prototype risk assessments that compare the results of traditional, data-rich risk assessments with insights gained from new types of molecular and systems biology data. In this manner, new approaches can be validated, traditional approaches improved, and the value of different types of new scientific information better understood. Discussion and Conclusions: We anticipate that these new approaches will have a variety of applications, such as assessment of new and existing chemicals in commerce and the design of chemical products and processes that reduce or eliminate the use or generation of hazardous substances. Additionally, results of the effort are likely to spur further research and test methods development. Full implementation of new approaches is likely to take 10–20 years. PMID:22875311

Anastas, Paul T.; Birnbaum, Linda S.; Clark, Rebecca M.; Dix, David J.; Edwards, Stephen W.; Preuss, Peter W.

2012-01-01

123

Enhanced Human Body Fall Detection Utilizing Advanced Classification of Video and Motion Perceptual Components  

Microsoft Academic Search

The monitoring of human physiological data, in both normal and abnormal situations of activity, is interesting for the purpose\\u000a of emergency event detection, especially in the case of elderly people living on their own. Several techniques have been proposed\\u000a for identifying such distress situations using either motion, audio or video data from the monitored subject and the surrounding\\u000a environment. This

Charalampos Doukas; Ilias Maglogiannis

2009-01-01

124

Free viewpoint video generation based on coding information of H.264/AVC  

NASA Astrophysics Data System (ADS)

Free viewpoint television (FTV) is a new technology that allows viewers to change view angles freely while watching TV programs. FTV requires a strong support of multi-view video codec (MVC), such as H.264/MVC defined by Joint Video Team(JVT). In this paper, we propose an FTV system which can produce videos as perceived in any view angles based on limited number of viewpoint videos decoded from H.264/MVC bitstreams. In this system, the decoded disparity vectors and motion vectors are diffused to produce smooth disparity fields for virtual view reconstruction. Decoded residue data under motion compensation are used as a match criterion. The proposed system not only greatly reduces the computation burden in creating FTV, but also improve the synthesized viewing quality due to the use of quarter pixel precision of H.264.

Lin, Chi-Kun; Hung, Yu-Chen; Tang, Chia-Tong; Hwang, Jenq-Neng; Yang, Jar-Ferr

2010-07-01

125

Semi Automatic Generator of Tactile Video Games for Visually Impaired Children  

Microsoft Academic Search

Currently, few video games are accessible for visually impaired people. Nevertheless, there are two ways in order to improve\\u000a video games accessibility: the use of sound or the use of touch. Even if the latter turns out to be the main exploited solution,\\u000a the use of touch remains substantial. Indeed, touch is the base of Braille learning and Braille knowledge

Alexis Sepchat; Nicolas Monmarché; Mohamed Slimane; Dominique Archambault

2006-01-01

126

Studies on advanced water-cooled reactors beyond generation III for power generation  

Microsoft Academic Search

China’s ambitious nuclear power program motivates the country’s nuclear community to develop advanced reactor concepts beyond\\u000a generation III to ensure a long-term, stable, and sustainable development of nuclear power. The paper discusses some main\\u000a criteria for the selection of future water-cooled reactors by considering the specific Chinese situation. Based on the suggested\\u000a selection criteria, two new types of water-cooled reactors

Xu Cheng

2007-01-01

127

Silicon carbide: an advanced platform for next generation quantum devices  

NASA Astrophysics Data System (ADS)

Optical and paramagnetic deep defects in silicon carbide (SiC) offer a vast opportunity to realize advanced quantum device and sensors based on SiC bulk material and SiC nanostructures. Nanostructures in silicon carbide such as nanoparticle and quantum dots possess strong sub-bandgap emission due to both quantum confinement and radiative recombination in deep defects, making them ideal as bio-markers. We will highlight silicon carbide extremely rich underlying resources, ideal for the implementation of next generation nanophotonics and spintronics quantum devices and related biomedical applications. Specifically, we show here the isolation of intrinsic defects in SiC achieved by electron irradiation of the material, yielding single photon emission.

Castelletto, S.; Johnson, B. C.; Parker, A.

2013-09-01

128

Clonal forestry, heterosis and advanced-generation breeding  

SciTech Connect

This report discusses the clonal planting stock offers many advantages to the forest products industry. Advanced-generation breeding strategies should be designed to maximize within-family variance and at the same time allow the capture of heterosis. Certainly there may be a conflict in the choice of breeding strategy based on the trait of interest. It may be that the majority of the traits express heterosis due to overdominance. Alternatively, disease resistance is expressed as the lack of a specific metabolite or infection court then the homozygous recessive genotype may be the most desirable. Nonetheless, as the forest products industry begins to utilize the economic advantages of clonal forestry, breeding strategies will have to be optimized for these commercial plant materials. Here, molecular markers can be used to characterize the nature of heterosis and therefore define the appropriate breeding strategy.

Tuskan, G.A.

1997-08-01

129

3D video surveillance with Augmented Virtual Environments  

Microsoft Academic Search

Recent advances in sensing and computing technologies have inspired a new generation of data analysis and visualization systems for video surveillance applications. We present a novel visualization system for video surveillance based on an Augmented Virtual Environment (AVE) that fuses dynamic imagery with 3D models in a real-time display to help observers comprehend multiple streams of temporal data and imagery

Ismail Oner Sebe; Jinhui Hu; Suya You; Ulrich Neumann

2003-01-01

130

Recent advances in the new generation taxane anticancer agents.  

PubMed

Recent advances in the design and preclinical evaluations of promising new generation taxane anticancer agents are reviewed in this article. Paclitaxel and docetaxel are two of the most important anticancer drugs today. However, recent reports have shown that treatment with these drugs often encounters undesirable side effects as well as drug resistance. Therefore, it is important to develop new taxane anticancer agents with fewer side effects, superior pharmacological properties, and improved activity against drug-resistant human cancers. Structure-activity relationship (SAR) studies led to the discovery of a series of highly active second-generation taxanes. One of them, "Ortataxel" (SB-T-101131, IDN5109, BAY59-8862), exhibits excellent activity against a variety of drug-sensitive and drug-resistant cancer cell lines, as well as human tumor xenografts in mice. It is orally active and is currently in phase II clinical trials. Photoaffinity labeling of microtubules and P-glycoprotein using photoreactive radiolabeled taxoids has disclosed the drug-binding domain of tubulin as well as Pgp. Together with information on microtubule-bound fluorine-labeled taxoids obtained by solid-state NMR studies, the bioactive conformation of paclitaxel and taxoids appears to emerge. Novel taxane-monoclonal antibody (mAb) immunoconjugates, have shown highly promising results for the tumor-specific delivery and release of an extremely cytotoxic, second-generation taxane. Also, another novel series of second generation taxanes conjugated with n-3 polyunsaturated fatty acids, e.g. decosahexaenoic acid (DHA), has exhibited impressive antitumor activity with minimum general toxicity against the highly drug-resistant DLD-1 human colon cancer xenografts in SCID mice. PMID:16787308

Geney, R; Chen, J; Ojima, I

2005-03-01

131

Video Summarization via Crowdsourcing  

E-print Network

Video Summarization via Crowdsourcing Abstract Although video summarization has been studied extensively, existing schemes are neither lightweight nor generalizable to all types of video content. To generate accurate abstractions of all types of video, we propose a framework called Click2SMRY, which

Chen, Sheng-Wei

132

Distributed video generation on a GPU-cluster for the web-based analysis of medical image data  

NASA Astrophysics Data System (ADS)

Modern 3D visualization environments for medical image data provide high interactivity and flexibility but depend on the expert knowledge and the experience of the user with respect to the software application. The definition of the visualization parameters is a manual time-consuming process and as a result, inter-patient or inter-study comparisons are extremely difficult. To overcome these drawbacks in case of the analysis and diagnosis of pathologies, standardization of 3D visualization is an important issue. For this purpose automatically generated digital video sequences can be used to convey the most important information contained in the data. In this paper, we present an improvement of our existing web-based service which is now able to calculate the video sequences in much shorter time exploiting the power of a GPU-cluster. The system requires to transfer a medical volume dataset from an arbitrary computer connected via Internet and sends back a number of video files automatically generated with direct volume rendering. To achieve an optimal load balancing of the available resources, the tasks of automatic adjustment of transfer functions, volume rendering, and video encoding are divided into small sub-requests, which are distributed to the different cluster nodes in order to be performed in parallel. An additional preview mode, which renders a number of dedicated frames, provides a direct feedback and quick overview. For the evaluation, we were focusing on the analysis of intracranial aneurysms and were able to show that the system can be successfully applied. Further on, the system was developed in a way that allows easy integration of other analysis tasks.

Rößler, Friedemann A.; Wolff, Torsten; Iserhardt-Bauer, Sabine; Tomandl, Bernd; Hastreiter, Peter; Ertl, Thomas

2007-03-01

133

Brain-computer interface: Next generation thought controlled distributed video game development platform  

Microsoft Academic Search

In this paper we present a system that uses the human ability to control a video game on a mobile device using electroencephalographic (EEG) Mu rhythms. The signals were obtained using a specially designed electrode cap and equipment, and sent through a Bluetooth connection to a PC that processes it in real time. The signal was then mapped onto two

Payam Aghaei Pour; Tauseef Gulrez; Omar AlZoubi; Gaetano Gargiulo; Rafael A. Calvo

2008-01-01

134

Next Generation Preschool Math: Can video-based PD work? (re: Math Talk)  

NSDL National Science Digital Library

As part of its NSF-funded research, the NGPM project is exploring the use of PD videos such as these, which focus on the role of math talk in preschool classrooms. The four brief clips (3-5 min. each) in this blog entry show teachers discussing the nature and importance of math talk and demonstrating how they promote it with their students.

2013-08-22

135

MULTIPLE BACKGROUND SPRITE GENERATION USING CAMERA MOTION CHARACTERIZATION FOR OBJECT-BASED VIDEO CODING  

E-print Network

-based video coding can pro- vide higher coding gain than common H.264/AVC for single-view and the MVC standard based on H.264 for multi-view (MVC). The use of background sprites outperformes the AVC/MVC especially

Wichmann, Felix

136

The Mercury Laser Advances Laser Technology for Power Generation  

SciTech Connect

The National Ignition Facility (NIF) at Lawrence Livermore Laboratory is on target to demonstrate 'breakeven' - creating as much fusion-energy output as laser-energy input. NIF will compress a tiny sphere of hydrogen isotopes with 1.8 MJ of laser light in a 20-ns pulse, packing the isotopes so tightly that they fuse together, producing helium nuclei and releasing energy in the form of energetic particles. The achievement of breakeven will culminate an enormous effort by thousands of scientists and engineers, not only at Livermore but around the world, during the past several decades. But what about the day after NIF achieves breakeven? NIF is a world-class engineering research facility, but if laser fusion is ever to generate power for civilian consumption, the laser will have to deliver pulses nearly 100,000 times faster than NIF - a rate of perhaps 10 shots per second as opposed to NIF's several shots a day. The Mercury laser (named after the Roman messenger god) is intended to lead the way to a 10-shots-per-second, electrically-efficient, driver laser for commercial laser fusion. While the Mercury laser will generate only a small fraction of the peak power of NIF (1/30,000), Mercury operates at higher average power. The design of Mercury takes full advantage of the technology advances manifest in its behemoth cousin (Table 1). One significant difference is that, unlike the flashlamp-pumped NIF, Mercury is pumped by highly efficient laser diodes. Mercury is a prototype laser capable of scaling in aperture and energy to a NIF-like beamline, with greater electrical efficiency, while still running at a repetition rate 100,000 times greater.

Ebbers, C A; Caird, J; Moses, E

2009-01-21

137

Advanced Combustion Systems for Next Generation Gas Turbines  

SciTech Connect

Next generation turbine power plants will require high efficiency gas turbines with higher pressure ratios and turbine inlet temperatures than currently available. These increases in gas turbine cycle conditions will tend to increase NOx emissions. As the desire for higher efficiency drives pressure ratios and turbine inlet temperatures ever higher, gas turbines equipped with both lean premixed combustors and selective catalytic reduction after treatment eventually will be unable to meet the new emission goals of sub-3 ppm NOx. New gas turbine combustors are needed with lower emissions than the current state-of-the-art lean premixed combustors. In this program an advanced combustion system for the next generation of gas turbines is being developed with the goal of reducing combustor NOx emissions by 50% below the state-of-the-art. Dry Low NOx (DLN) technology is the current leader in NOx emission technology, guaranteeing 9 ppm NOx emissions for heavy duty F class gas turbines. This development program is directed at exploring advanced concepts which hold promise for meeting the low emissions targets. The trapped vortex combustor is an advanced concept in combustor design. It has been studied widely for aircraft engine applications because it has demonstrated the ability to maintain a stable flame over a wide range of fuel flow rates. Additionally, it has shown significantly lower NOx emission than a typical aircraft engine combustor and with low CO at the same time. The rapid CO burnout and low NOx production of this combustor made it a strong candidate for investigation. Incremental improvements to the DLN technology have not brought the dramatic improvements that are targeted in this program. A revolutionary combustor design is being explored because it captures many of the critical features needed to significantly reduce emissions. Experimental measurements of the combustor performance at atmospheric conditions were completed in the first phase of the program. Emissions measurements were obtained over a variety of operating conditions. A kinetics model is formulated to describe the emissions performance. The model is a tool for determining the conditions for low emission performance. The flow field was also modeled using CFD. A first prototype was developed for low emission performance on natural gas. The design utilized the tools anchored to the atmospheric prototype performance. The 1/6 scale combustor was designed for low emission performance in GE's FA+e gas turbine. A second prototype was developed to evaluate changes in the design approach. The prototype was developed at a 1/10 scale for low emission performance in GE's FA+e gas turbine. The performance of the first two prototypes gave a strong indication of the best design approach. Review of the emission results led to the development of a 3rd prototype to further reduce the combustor emissions. The original plan to produce a scaled-up prototype was pushed out beyond the scope of the current program. The 3rd prototype was designed at 1/10 scale and targeted further reductions in the full-speed full-load emissions.

Joel Haynes; Jonathan Janssen; Craig Russell; Marcus Huffman

2006-01-01

138

ADVANCED CERAMIC MATERIALS FOR NEXT-GENERATION NUCLEAR APPLICATIONS  

SciTech Connect

Rising global energy demands coupled with increased environmental concerns point to one solution; they must reduce their dependence on fossil fuels that emit greenhouse gases. As the global community faces the challenge of maintaining sovereign nation security, reducing greenhouse gases, and addressing climate change nuclear power will play a significant and likely growing role. In the US, nuclear energy already provides approximately one-fifth of the electricity used to power factories, offices, homes, and schools with 104 operating nuclear power plants, located at 65 sites in 31 states. Additionally, 19 utilities have applied to the US Nuclear Regulatory Commission (NRC) for construction and operating licenses for 26 new reactors at 17 sites. This planned growth of nuclear power is occurring worldwide and has been termed the 'nuclear renaissance.' As major industrial nations craft their energy future, there are several important factors that must be considered about nuclear energy: (1) it has been proven over the last 40 years to be safe, reliable and affordable (good for Economic Security); (2) its technology and fuel can be domestically produced or obtained from allied nations (good for Energy Security); and (3) it is nearly free of greenhouse gas emissions (good for Environmental Security). Already an important part of worldwide energy security via electricity generation, nuclear energy can also potentially play an important role in industrial processes and supporting the nation's transportation sector. Coal-to-liquid processes, the generation of hydrogen and supporting the growing potential for a greatly increased electric transportation system (i.e. cars and trains) mean that nuclear energy could see dramatic growth in the near future as we seek to meet our growing demand for energy in cleaner, more secure ways. In order to address some of the prominent issues associated with nuclear power generation (i.e., high capital costs, waste management, and proliferation), the worldwide community is working to develop and deploy new nuclear energy systems and advanced fuel cycles. These new nuclear systems address the key challenges and include: (1) extracting the full energy value of the nuclear fuel; (2) creating waste solutions with improved long term safety; (3) minimizing the potential for the misuse of the technology and materials for weapons; (4) continually improving the safety of nuclear energy systems; and (5) keeping the cost of energy affordable.

Marra, J.

2010-09-29

139

Fast generation of CGH of 3D video images by using block-based motion compensation techniques  

NASA Astrophysics Data System (ADS)

A new approach for fast generation of computer-generated-holograms (CGHs) by combined use of the N-LUT method and block matching motion compensation technique is proposed. Here, we apply block matching-based motion compensation algorithm to N-LUT-based CGH generation method by which a higher similarity between adjacent frames can be obtained. In the proposed method, the input video images are divided into blocks of fixed size and the CGHs of every block in reference frames are pre-calculated with the N-LUT method. The motion vectors of every block in the reference frame are extracted between reference frame and current frame, and a compensated frame image can be obtained by shifting every block's position according to the motion vectors. Through this process, 3-D objects data to be calculated for its video holograms are dramatically reduced leading to the greater reduction of the calculation time compared with the conventional temporal redundancy-based N-LUT (TR-N-LUT) method. The experiments have found that the average number of calculated object points for one frame and the average calculation time for one object point of the proposed method are reduced by 30.05% and 21.23% respectively compared to those with the conventional TRNLUT method.

Dong, Xiao-Bin; Kim, Seung-Cheol; Kim, Eun-Soo

2014-02-01

140

Second Generation Advanced Reburning for High Efficiency NOx Control  

SciTech Connect

This project develops a family of novel Second Generation Advanced Reburning (SGAR) NO{sub x} control technologies, which can achieve 95% NO{sub x} control in coal fired boilers at a significantly lower cost than Selective Catalytic Reduction (SCR). The conventional Advanced Reburning (AR) process integrates basic reburning and N-agent injection. The SGAR systems include six AR variants: (1) AR-Lean--injection of the N-agent and promoter along with overfire air; (2) AR-Rich--injection of N-agent and promoter into the reburning zone; (3) Multiple Injection Advanced Reburning (MIAR)--injection of N-agents and promoters both into the reburning zone and with overfire air; (4) AR-Lean + Promoted SNCR--injection of N-agents and promoters with overfire air and into the temperature zone at which Selective Non-Catalytic Reduction (SNCR) is effective; (5) AR-Rich + Promoted SNCR--injection of N-agents and promoters into the reburning zone and into the SNCR zone; and (6) Promoted Reburning + Promoted SNCR--basic or promoted reburning followed by basic or promoted SNCR process. The project was conducted in two phases over a five-year period. The work included a combination of analytical and experimental studies to confirm the process mechanisms, identify optimum process configurations, and develop a design methodology for full-scale applications. Phase I was conducted from October, 1995 to September, 1997 and included both analytical studies and tests in bench and pilot-scale test rigs. Phase I moved AR technology to Maturity Level III-Major Subsystems. Phase II is conducted over a 45 month period (October, 1997-June, 2001). Phase II included evaluation of alternative promoters, development of alternative reburning fuel and N-Agent jet mixing systems, and scale up. The goal of Phase II was to move the technology to Maturity Level I-Subscale Integrated System. Tests in combustion facility ranging in firing rate from 0.1 x 10{sup 6} to 10 x 10{sup 6} Btu/hr demonstrated the viability of the AR technology. The performance goals of the project to reduce NO{sub x} by up to 95% with net emissions less than 0.06 lb/10{sup 6} Btu and to minimize other pollutants (N{sub 2}O and NH{sub 3}) to levels lower than reburning and SNCR have been met. Experimental data demonstrated that AR-Lean + SNCR and Reburning + SNCR are the most effective AR configurations, followed by AR-Lean and AR-Rich. Promoters can increase AR NO{sub x} reduction efficiency. Promoters are the most effective at small amounts of the reburning fuel (6-10% of the total fuel heat input). Promoters provide the means to improve NO{sub x} reduction and simultaneously decrease the amount of reburning fuel. Tests also showed that alkali-containing compounds are effective promoters of the AR process. When co-injected with N-agent, they provide up to 25 % improvement in NO{sub x} reduction. A detailed reaction mechanism and simplified representation of mixing were used in modeling of AR processes. Modeling results demonstrated that the model correctly described a wide range of experimental data. Mixing and thermal parameters in the model can be adjusted depending on characteristics of the combustion facility. Application of the model to the optimization of AR-Lean has been demonstrated. Economic analysis demonstrated a considerable economic advantage of AR technologies in comparison with existing commercial NO{sub x} control techniques, such as basic reburning, SNCR, and SCR. Particularly for deep NO{sub x} control, coal-based AR technologies are 50% less expansive than SCR for the same level of NO{sub x} control. The market for AR technologies is estimated to be above $110 million.

Vladimir M. Zamansky; Peter M. Maly; Vitali V. Lissianski; Mark S. Sheldon; David Moyeda; Roy Payne

2001-06-30

141

Lifetime prediction modeling of airfoils for advanced power generation  

NASA Astrophysics Data System (ADS)

The use of gases produced from coal as a turbine fuel offers an attractive means for efficiently generating electric power from our Nation's most abundant fossil fuel resource. The oxy-fuel and hydrogen-fired turbine concepts promise increased efficiency and low emissions on the expense of increased turbine inlet temperature (TIT) and different working fluid. Developing the turbine technology and materials is critical to the creation of these near-zero emission power generation technologies. A computational methodology, based on three-dimensional finite element analysis (FEA) and damage mechanics is presented for predicting the evolution of creep and fatigue in airfoils. We took a first look at airfoil thermal distributions in these advanced turbine systems based on CFD analysis. The damage mechanics-based creep and fatigue models were implemented as user modified routine in commercial package ANSYS. This routine was used to visualize the creep and fatigue damage evolution over airfoils for hydrogen-fired and oxy-fuel turbines concepts, and regions most susceptible to failure were indentified. Model allows for interaction between creep and fatigue damage thus damage due to fatigue and creep processes acting separately in one cycle will affect both the fatigue and creep damage rates in the next cycle. Simulation results were presented for various thermal conductivity of the top coat. Surface maps were created on the airfoil showing the development of the TGO scale and the Al depletion of the bond coat. In conjunction with model development, laboratory-scale experimental validation was executed to evaluate the influence of operational compressive stress levels on the performance of the TBC system. TBC coated single crystal coupons were exposed isothermally in air at 900, 1000, 1100oC with and without compressive load. Exposed samples were cross-sectioned and evaluated with scanning electron microscope (SEM). Performance data was collected based on image analysis. Energy-dispersive x-ray (EDX) was employed to study the elemental distribution in TBC system after exposure. Nanoindentation was used to study the mechanical properties (Young's modulus and hardness) of the components in the TBC system and their evolution with temperature and time.

Karaivanov, Ventzislav Gueorguiev

142

Oxygen Generation from Carbon Dioxide for Advanced Life Support  

NASA Technical Reports Server (NTRS)

The partial electrochemical reduction of CO2 using ceramic oxygen generators (COGs) is well known and has been studied. Conventional COGs use yttria-stabilized zirconia (YSZ) electrolytes and operate at temperatures greater than 700 C (1, 2). Operating at a lower temperature has the advantage of reducing the mass of the ancillary components such as insulation. Moreover, complete reduction of metabolically produced CO2 (into carbon and oxygen) has the potential of reducing oxygen storage weight if the oxygen can be recovered. Recently, the University of Florida developed ceramic oxygen generators employing a bilayer electrolyte of gadolinia-doped ceria and erbia-stabilized bismuth oxide (ESB) for NASA s future exploration of Mars (3). The results showed that oxygen could be reliably produced from CO2 at temperatures as low as 400 C. These results indicate that this technology could be adapted to CO2 removal from a spacesuit and other applications in which CO2 removal is an issue. This strategy for CO2 removal in advanced life support systems employs a catalytic layer combined with a COG so that the CO2 is reduced completely to solid carbon and oxygen. First, to reduce the COG operating temperature, a thin, bilayer electrolyte was employed. Second, to promote full CO2 reduction while avoiding the problem of carbon deposition on the COG cathode, a catalytic carbon deposition layer was designed and the cathode utilized materials shown to be coke resistant. Third, a composite anode was used consisting of bismuth ruthenate (BRO) and ESB that has been shown to have high performance (4). The inset of figure 1 shows the conceptual design of the tubular COG and the rest of the figure shows schematically the test apparatus. Figure 2 shows the microstructure of a COG tube prior to testing. During testing, current is applied across the cell and initially CuO is reduced to copper metal by electrochemical pumping. Then the oxygen source becomes the CO/CO2. This presentation details the results of testing the COG.

Bishop, s. R.; Duncan, K. L.; Hagelin-Weaver, H. E.; Neal, L.; Paul, H. L.; Wachsman, E. D.

2007-01-01

143

Development of third generation advanced high strength steels  

NASA Astrophysics Data System (ADS)

Lightweight duplex steels with combinations of either bainite, acicular ferrite, and austenite or martensite and austenite were investigated as third generation advanced high strength steels targeted for automotive applications. Large additions of manganese (> 13 wt%) and carbon (<0.2wt%) were employed to stabilize the austenite phase. Silicon additions between 1 and 2 wt% were added to suppress cementite formation. Strength and ductility were increased while density was decreased with aluminum additions between 2.4 and 5.5 wt% to the steel. This research addressed the dependence of alloying on microstructures and mechanical behavior for high manganese and aluminum duplex steels that were cast and subsequently hot rolled. Duplex steels with different volume fractions of primary delta-ferrite were used to study the crystallography of austenite fanned during the peritectic reaction. Solute profiles across the peritectic interface showed aluminum segregated near the interface which promoted bainitic ferrite formation. Thermal treatments were used to manipulate the concentration and type of oxides and the ferrite plate density was found to correlate with inclusions of low misfit in steels with austenite grain size of 16.5 microm. A steel with bainite and acicular ferrite produced an ultimate tensile strength of 970 MPa and elongation of 40%. The mechanical prope1iies depended on the strengths and size of the microstructural constituents. Work hardening behavior was examined in a steel exhibiting multiple martensitic transformation induced plasticity (gamma-austenite?epsilon-smartensite?alpha-martensite). A strain hardening exponent as high as 1.4 was observed with ultimate tensile strength and elongation as high as 1,165 MPa and 34%.

McGrath, Meghan Colleen

144

PC-compatible computer-generated stimuli for video-task testing  

NASA Technical Reports Server (NTRS)

A program for automatic computer generation of novel nonverbal stimuli is described. The program, STIMGEN, allows menu-driven control over the type and appearance of stimuli. Data are presented in which two monkeys matched to sample with high accuracy using stimuli generated with STIMGEN. These data are interpreted to support the usefulness and value of automatic stimulus generation in a variety of applications.

Washburn, David A.

1990-01-01

145

Using Temporal Video Annotation as a Navigational Aid for Video Browsing  

E-print Network

Using Temporal Video Annotation as a Navigational Aid for Video Browsing Stefanie Müller | Gregor scene! Great goal! Go Canada Go! 1 2 4 5 3 video is a complex· information space requires advanced· navigational aids temporal video anno-· tation offers new opportunities for navigating video novel video

Millerm Gregor

146

Realistic Video Avatar  

Microsoft Academic Search

In this paper, we present a system for the implementation of a photorealistic avatar using video captured from a user . This is achieved by constructing the dynamic video texture map and combining it with the 3D mesh model of the user to render the photorealistic avatar. The dynamic video texture map reflects the user's facial expressions and is generated

Wing Ho Leung; Belle L. Tseng; Zon-yin Shae; Ferdinand Hendriks; Tsuhan Chen

2000-01-01

147

Attention driven foveated video quality assessment.  

PubMed

Contrast sensitivity of the human visual system to visual stimuli can be significantly affected by several mechanisms, e.g., vision foveation and attention. Existing studies on foveation based video quality assessment only take into account static foveation mechanism. This paper first proposes an advanced foveal imaging model to generate the perceived representation of video by integrating visual attention into the foveation mechanism. For accurately simulating the dynamic foveation mechanism, a novel approach to predict video fixations is proposed by mimicking the essential functionality of eye movement. Consequently, an advanced contrast sensitivity function, derived from the attention driven foveation mechanism, is modeled and then integrated into a wavelet-based distortion visibility measure to build a full reference attention driven foveated video quality (AFViQ) metric. AFViQ exploits adequately perceptual visual mechanisms in video quality assessment. Extensive evaluation results with respect to several publicly available eye-tracking and video quality databases demonstrate promising performance of the proposed video attention model, fixation prediction approach, and quality metric. PMID:24184726

You, Junyong; Ebrahimi, Touradj; Perkis, Andrew

2014-01-01

148

Example-based video remixing  

Microsoft Academic Search

A video remix is generally created by arranging selected video clips and combining them with other media streams such as audio\\u000a clips and video transition effects. This paper proposes a system for semi-automatically creating video remixes of good expressive\\u000a quality. Given multiple original video clips, audio clips, and transition effects as the input, the proposed system generates\\u000a a video remix

Naoko Nitta; Noboru Babaguchi

2011-01-01

149

Feasibility of complete video-assisted thoracoscopic surgery following neoadjuvant therapy for locally advanced non-small cell lung cancer  

PubMed Central

Objective To explore the feasibility of complete video-assisted thoracoscopic surgery (c-VATS) following neoadjuvant therapy (chemotherapy, targeted therapy and radiotherapy, either alone or in combination) for the treatment of patients with non-small cell lung cancer (NSCLC). Methods The clinical data of 43 NSCLC patients undergoing c-VATS following neoadjuvant therapy were retrospectively analyzed, including the preoperative functional indicators, staging, concurrent diseases, surgical techniques, operation time, number of lymph nodes dissected and postoperative drainage time and quantity, postoperative hospital stay, postoperative complications, and survival. Results From January 2006 to March 2012, a total of 43 patients with stage IIA-IIIB NSCLC were included in this study (IIIA: 27 cases, 62.8%; IIIB: 11 cases, 25.6%), including 32 males (74.4%) and 11 females (25.6%). Forty-two patients were operated successfully, 28 underwent pulmonary lobectomies (including 9 bronchial sleeve resections), 5 had double lobectomies, 5 had wedge resections, and 4 had total pneumonectomies. Seven patients were referred to undergo Hybrid VATS (7/42, 16.7%). The mean length of the operation was 160.48±16.52 min (range, 130-180 min); the intraoperative blood loss was 253.57±117.08 mL; the number of lymph nodes dissected was 16.88±10.93; the postoperative drainage time was 1-7 d (mean: 2.62±0.96 d); and the postoperative hospital stay was 3-7 d (mean: 5.45±1.30 d). The incidence of postoperative complications was 9.5% (4/42), and the perioperative mortality was 2.4% (1/42). The 1-, 2-, and 3-year overall survival rates were 94%, 79%, and 65%, respectively. Conclusions c-VATS following neoadjuvant therapy is safe and feasible for the treatment of locally advanced NSCLC. PMID:24040535

Huang, Jun; Xu, Xin; Chen, Hanzhang; Yin, Weiqiang; Shao, Wenlong; Xiong, Xinguo

2013-01-01

150

Advanced COIL based on atomic iodine generation using gaseous reactants  

Microsoft Academic Search

Development of a Chemical Oxygen-Iodine Laser (COIL) with alternative ways of atomic iodine generation is aimed at power increase and simplified laser operation. Advantages of chemical generation of atomic iodine using gaseous reactants directly in the laser medium are confronted with disadvantages of using molecular iodine as a source of atomic iodine in conventional COIL devices. Some recent results on

Jarmila Kodymova; Otomar Spalek; Miroslav Censky; Vit Jirasek; Gordon D. Hager

2004-01-01

151

Advanced feedwater control for next generation nuclear power systems  

Microsoft Academic Search

In current generation Pressurized Water Reactors (PWRs), the control of Steam Generator level experiences challenges over the full range of plant operating conditions. These challenges can be particularly troublesome in the low power range where the feedwater is highly subcooled and minor changes in the feed flow may cause oscillations in the SG level, potentially leading to reactor trip. Substantial

Hengliang Shen

2006-01-01

152

Advanced Optical Components for Next Generation Photonic Networks  

E-print Network

Generation Photonic Networks. While the natural conclusion is to pursue Photonic Packet Switching-reconfiguration capabilities. The third-generation optical-networking, optical- #12;packet switching can achieve dynamic-similar nature of data traffic indicates that packet switching and burst switching will be beneficial in the Next

Kolner, Brian H.

153

Advances of interior permanent magnet (IPM) wind generators  

Microsoft Academic Search

The current confluence of energy needs, enhanced environmental awareness and technical developments has led vigorous global efforts toward making wind power a key component of renewable and sustainable energy resources. The conventional wind generators are induction machine types having small and limited wind power production and high cost per unit. Large wind plants involving interior permanent magnet (IPM) synchronous generators

M. A. Rahman

2008-01-01

154

Stereo side information generation in low-delay distributed stereo video coding  

NASA Astrophysics Data System (ADS)

Distributed Video Coding (DVC) is a technique that allows shifting the computational complexity from the encoder to the decoder. One of the core elements of the decoder is the creation of the Side Information (SI), which is a hypothesis of what the to-be-decoded frame looks like. Much work on DVC has been carried out: often the decoder can use future and past frames in order to obtain the SI exploiting the time redundancy. Other work has addressed a Multiview scenario; exploiting the frames coming from cameras close to the one we are decoding (usually a left and right camera) it is possible to create SI exploiting the inter-view spatial redundancy. A careful fusion of the two SI should be done in order to use the best part of each SI. In this work we study a Stereo Low-Delay scenario using only two views. Due to the delay constraint we use only past frames of the sequence we are decoding and past and present frames of the other. This is done by using Extrapolation, to exploit the time redundancy and well known techniques for stereo error concealment. This allows us to create good quality SI even if we are only using two views. In this work we have also used a new method in order to fuse the two SIs, inspired by Multi-Hypothesis decoding. In this work the multiple hypotheses are used to fuse the SIs. Preliminary results show improvements up to 1 d?.

Salmistraro, Matteo; Forchhammer, Søren

2012-10-01

155

Advanced fiber Bragg gratings for photonic generation and processing of arbitrary microwave waveforms  

Microsoft Academic Search

Photonic generation and processing of microwave arbitrary waveforms has been a topic of interest recently. Compared with the electronic techniques, photonics techniques provide the capabilities of generating and processing high-frequency and large-bandwidth microwave waveforms which cannot be fulfilled by the electronic techniques, In this paper, techniques to generate and process microwave arbitrary waveforms in the optical domain using advanced fiber

Chao Wang; Jianping Yao

2010-01-01

156

Advanced feedwater control for next generation nuclear power systems  

NASA Astrophysics Data System (ADS)

In current generation Pressurized Water Reactors (PWRs), the control of Steam Generator level experiences challenges over the full range of plant operating conditions. These challenges can be particularly troublesome in the low power range where the feedwater is highly subcooled and minor changes in the feed flow may cause oscillations in the SG level, potentially leading to reactor trip. Substantial attention has been given to feedwater control systems with recognition of the difficulty of the full range feedwater control problem due to steam generator level shrink-swell phenomena, changes in valve and flow path characteristics, and other nonlinear phenomena over the full range of operating conditions. The IRIS reactor concept adds additional challenges to the feedwater control problem as a result of a steam generator design where neither level or steam generator mass inventory can be measured directly. Neural networks have demonstrated capabilities to capture a wide range of dynamic signal transformation and non-linear problems. In this project a detailed engineering simulation of plant response is used to develop and test neural control methods for the IRIS full range feedwater control problem. The established neural feed controller has demonstrated the capability to improve the performance of SG level or mass control under transient conditions and over a wide range of reactor power including abnormal conditions.

Shen, Hengliang

157

Creating Next Generation Blended Learning Environments Using Mixed Reality, Video Games and Simulations  

ERIC Educational Resources Information Center

In this article, the challenges and issues of designing next generation learning environments using current and emerging technologies are addressed. An overview of the issues is provided as well as design principles that support the design of instruction and the overall learning environment. Specific methods for creating cognitively complex,…

Kirkley, Sonny E.; Kirkley, Jamie R.

2005-01-01

158

Comparison of two advanced generation mating designs for loblolly pine (Pinus taeda L.)  

E-print Network

COMPARISON OF TWO ADVANCED GENERATION MATING DESIGNS FOR LOBLOLLY PINE (Pious taeda L. ) A Thesis by PATRICIA ADLENE LAYTON Submitted to the Graduate College of Texas ASM University in Partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1978 Major Sub)cot: Forestry COMPARISON OF TWO ADVANCED GENERATION MATING DESIGNS FOR LOBLOLLY PINE (Pinus caeda L. ) by PATRICIA ADLENE LAYTDN Appxcnied aa te style 'and tuateat by: tees) ber) ABSTRACT Comparison...

Layton, Patricia Adlene

2012-06-07

159

A modified advancing layers mesh generation for thin three-dimensional objects with variable thickness  

Microsoft Academic Search

A method of generating modified advancing layers mesh is proposed. In this paper the mesh generation process of semi-unstructured prismatic\\/tetrahedral mesh is presented for relatively thin three-dimensional geometries with variable thickness, as in the case of injection molding analysis. Prismatic meshes are generated by offsetting initial surface triangular meshes. During the mesh generation process, mesh quality is efficiently improved with

Young Choi; Ki-Youn Kwon; Soo-Won Chae; Dong-Min Kim

2009-01-01

160

Advanced Micro Optics Characterization Using Computer Generated Holograms  

SciTech Connect

This CRADA has enabled the validation of Computer Generated Holograms (CGH) testing for certain classes of micro optics. It has also identified certain issues that are significant when considering the use of CGHs in this application. Both contributions are advantageous in the pursuit of better manufacturing and testing technologies for these important optical components.

Arnold, S.; Maxey, L.C.; Moreshead, W.; Nogues, J.L.

1998-11-01

161

Advancing Next-Generation Energy in Indian Country (Fact Sheet)  

SciTech Connect

This fact sheet provides information on Tribes in the lower 48 states selected to receive assistance from the Strategic Technical Assistance Response Team (START) Program, a U.S. Department of Energy Office of Indian Energy Policy and Programs (DOE-IE) initiative to provide technical expertise to support the development of next-generation energy projects in Indian Country.

Not Available

2012-08-01

162

Advancing Next-Generation Energy in Indian Country (Fact Sheet)  

SciTech Connect

This fact sheet provides information on the Alaska Native governments selected to receive assistance from the Strategic Technical Assistance Response Team (START) Program, a U.S. Department of Energy Office of Indian Energy Policy and Programs (DOE-IE) initiative to provide technical expertise to support the development of next-generation energy projects in Indian Country.

Not Available

2012-08-01

163

ADVANCED INTERNAL COMBUSTION ELECTRICAL GENERATOR Peter Van Blarigan  

E-print Network

Livermore, CA 94550 Abstract In this paper, research on hydrogen internal combustion engines is discussed with industrial partners. The electrical generator is based on developed internal combustion reciprocating engine. In light of these factors, the capabilities of internal combustion engines have been reviewed. In regards

164

Advancing Next-Generation Energy in Indian Country (Fact Sheet)  

SciTech Connect

This fact provides information on the Strategic Technical Assistance Response Team (START) Program, a U.S. Department of Energy Office of Indian Energy Policy and Programs (DOE-IE) initiative to provide technical expertise to support the development of next-generation energy projects in Indian Country.

Not Available

2012-08-01

165

Advanced theory of multiple exciton generation effect in quantum dots  

NASA Astrophysics Data System (ADS)

The theoretical aspects of the effect of multiple exciton generation (MEG) in quantum dots (QDs) have been analysed in this work. The statistical theory of MEG in QDs based on Fermi's approach is presented, taking into account the momentum conservation law. According to Fermi this approach should give the ultimate quantum efficiencies of multiple particle generation. The microscopic mechanism of this effect is based on the theory of electronic "shaking". According to this approach, the wave function of "shaking" electrons can be selected as Plato's functions with effective charges depending on the number of generated excitons. From the theory it is known increasing the number of excitons leads to enhancement of the Auger recombination of electrons which results in reduced quantum yields of excitons. The deviation of the averaged multiplicity of the MEG effect from the Poisson law of fluctuations has been investigated on the basis of synergetics approaches. In addition the role of interface electronic states of QDs and ligands has been considered by means of quantum mechanical approaches. The size optimisation of QDs has been performed to maximise the multiplicity of the MEG effect.

Oksengendler, B. L.; Turaeva, N. N.; Rashidova, S. S.

2012-06-01

166

Generation of three-dimensional unstructured grids by the advancing-front method  

NASA Technical Reports Server (NTRS)

The generation of three-dimensional unstructured grids using the advancing-front technique is described. While this generation technique has been shown to be effective for the generation of unstructured grids in two dimensions, its extension to three-dimensional regions required the development of surface definition software and sophisticated data structures to avoid excessive CPU-time overheads for the search operations involved. After obtaining an initial triangulation of the surfaces, tetrahedrons are generated by successively deleting faces from the generation front. Details of the mesh generation algorithm are given, together with examples and timings.

Lohner, Rainald; Parikh, Paresh

1988-01-01

167

Advanced Unstructured Grid Generation for Complex Aerodynamic Applications  

NASA Technical Reports Server (NTRS)

A new approach for distribution of grid points on the surface and in the volume has been developed and implemented in the NASA unstructured grid generation code VGRID. In addition to the point and line sources of prior work, the new approach utilizes surface and volume sources for automatic curvature-based grid sizing and convenient point distribution in the volume. A new exponential growth function produces smoother and more efficient grids and provides superior control over distribution of grid points in the field. All types of sources support anisotropic grid stretching which not only improves the grid economy but also provides more accurate solutions for certain aerodynamic applications. The new approach does not require a three-dimensional background grid as in the previous methods. Instead, it makes use of an efficient bounding-box auxiliary medium for storing grid parameters defined by surface sources. The new approach is less memory-intensive and more efficient computationally. The grids generated with the new method either eliminate the need for adaptive grid refinement for certain class of problems or provide high quality initial grids that would enhance the performance of many adaptation methods.

Pirzadeh, Shahyar Z.

2008-01-01

168

Video de-Abstraction or How to save money on your wedding video  

Microsoft Academic Search

There exist an increasing body of work dealing with video still abstraction, the extraction of representative still images from a video sequence. This work focuses in the other direction: given a video abstract and raw unedited video data, we produce an edited video. We focus on the application of generating wedding videos. We use the existing wedding photo album as

Aya Aner-wolf; Lior Wolf

2002-01-01

169

Domain Decomposition By the Advancing-Partition Method for Parallel Unstructured Grid Generation  

NASA Technical Reports Server (NTRS)

A new method of domain decomposition has been developed for generating unstructured grids in subdomains either sequentially or using multiple computers in parallel. Domain decomposition is a crucial and challenging step for parallel grid generation. Prior methods are generally based on auxiliary, complex, and computationally intensive operations for defining partition interfaces and usually produce grids of lower quality than those generated in single domains. The new technique, referred to as "Advancing Partition," is based on the Advancing-Front method, which partitions a domain as part of the volume mesh generation in a consistent and "natural" way. The benefits of this approach are: 1) the process of domain decomposition is highly automated, 2) partitioning of domain does not compromise the quality of the generated grids, and 3) the computational overhead for domain decomposition is minimal. The new method has been implemented in NASA's unstructured grid generation code VGRID.

Pirzadeh, Shahyar Z.; Zagaris, George

2009-01-01

170

Utilizing Computer and Multimedia Technology in Generating Choreography for the Advanced Dance Student at the High School Level.  

ERIC Educational Resources Information Center

This study describes a pilot program utilizing various multimedia computer programs on a MacQuadra 840 AV. The target group consisted of six advanced dance students who participated in the pilot program within the dance curriculum by creating a database of dance movement using video and still photography. The students combined desktop publishing,…

Griffin, Irma Amado

171

Advances in Channel-adaptive Video Streaming Bernd Girod, Mark Kalman, Yi J. Liang, and Rui Zhang  

E-print Network

data, adaptive media playout can be used to reduce receiver buffering and therefore average latency packet, and the inter-packet dependencies. Thirdly, at the source encoder channel-adaptive packet dependency control can greatly improve the error-resilience of streaming video and reduce latency. Finally we

Girod, Bernd

172

Advanced Unstructured Grid Generation for Complex Aerodynamic Applications  

NASA Technical Reports Server (NTRS)

A new approach for distribution of grid points on the surface and in the volume has been developed. In addition to the point and line sources of prior work, the new approach utilizes surface and volume sources for automatic curvature-based grid sizing and convenient point distribution in the volume. A new exponential growth function produces smoother and more efficient grids and provides superior control over distribution of grid points in the field. All types of sources support anisotropic grid stretching which not only improves the grid economy but also provides more accurate solutions for certain aerodynamic applications. The new approach does not require a three-dimensional background grid as in the previous methods. Instead, it makes use of an efficient bounding-box auxiliary medium for storing grid parameters defined by surface sources. The new approach is less memory-intensive and more efficient computationally. The grids generated with the new method either eliminate the need for adaptive grid refinement for certain class of problems or provide high quality initial grids that would enhance the performance of many adaptation methods.

Pirzadeh, Shahyar

2010-01-01

173

Advanced gas turbines: The choice for low-cost, environmentally superior electric power generation  

SciTech Connect

In July 1993, the US Department of Energy (DOE) initiated an ambitious 8-year program to advance state-of-the-art gas turbine technology for land-based electric power generation. The program, known as the Advanced Turbine System (ATS) Program, is a joint government/industry program with the objective to demonstrate advanced industrial and utility gas turbine systems by the year 2000. The goals of the ATS Program are to develop gas turbine systems capable of providing low-cost electric power, while maintaining environmental superiority over competing power generation options. A progress report on the ATS Program pertaining to program status at DOE will be presented and reviewed in this paper. The technical challenges, advanced critical technology requirements, and systems designs meeting the goals of the program will be described and discussed.

Zeh, C.M.

1996-08-01

174

Frame Loss Error Concealment For Multiview Video Coding  

E-print Network

-kui.wang@nokia.com miska.hannuksela@nokia.com Abstract--The Multiview Video Coding (MVC) standard is currently under development by the Joint Video Team as an extension of the Advanced Video Coding (H.264/AVC) standard. An MVC interest recently. In multiview video coding (MVC), the original video content is a group of video

Gabbouj, Moncef

175

Mobile-Cloud Assisted Video Summarization Framework for Efficient Management of Remote Sensing Data Generated by Wireless Capsule Sensors  

PubMed Central

Wireless capsule endoscopy (WCE) has great advantages over traditional endoscopy because it is portable and easy to use, especially in remote monitoring health-services. However, during the WCE process, the large amount of captured video data demands a significant deal of computation to analyze and retrieve informative video frames. In order to facilitate efficient WCE data collection and browsing task, we present a resource- and bandwidth-aware WCE video summarization framework that extracts the representative keyframes of the WCE video contents by removing redundant and non-informative frames. For redundancy elimination, we use Jeffrey-divergence between color histograms and inter-frame Boolean series-based correlation of color channels. To remove non-informative frames, multi-fractal texture features are extracted to assist the classification using an ensemble-based classifier. Owing to the limited WCE resources, it is impossible for the WCE system to perform computationally intensive video summarization tasks. To resolve computational challenges, mobile-cloud architecture is incorporated, which provides resizable computing capacities by adaptively offloading video summarization tasks between the client and the cloud server. The qualitative and quantitative results are encouraging and show that the proposed framework saves information transmission cost and bandwidth, as well as the valuable time of data analysts in browsing remote sensing data. PMID:25225874

Mehmood, Irfan; Sajjad, Muhammad; Baik, Sung Wook

2014-01-01

176

Listeria Video  

NSDL National Science Digital Library

This video of This microscope video shows how live Listeria move via actin filaments in an infected cell. This video is also featured on the DVD 2000 and Beyond: Confronting the Microbe Menace, available free from HHMI. This video is one minute and 7 seconds in length, and available in MOV (6 MB) and WMV (8 MB). All Infectious Disease videos are located at: http://www.hhmi.org/biointeractive/disease/video.html.

Dr. Brett Finlay (Howard Hughes Medical Institute;)

2007-03-28

177

Unconstrained plastering : all-hexahedral mesh generation via advancing front geometry decomposition (2004-2008).  

SciTech Connect

The generation of all-hexahedral finite element meshes has been an area of ongoing research for the past two decades and remains an open problem. Unconstrained plastering is a new method for generating all-hexahedral finite element meshes on arbitrary volumetric geometries. Starting from an unmeshed volume boundary, unconstrained plastering generates the interior mesh topology without the constraints of a pre-defined boundary mesh. Using advancing fronts, unconstrained plastering forms partially defined hexahedral dual sheets by decomposing the geometry into simple shapes, each of which can be meshed with simple meshing primitives. By breaking from the tradition of previous advancing-front algorithms, which start from pre-meshed boundary surfaces, unconstrained plastering demonstrates that for the tested geometries, high quality, boundary aligned, orientation insensitive, all-hexahedral meshes can be generated automatically without pre-meshing the boundary. Examples are given for meshes from both solid mechanics and geotechnical applications.

Blacker, Teddy Dean; Staten, Matthew L.; Kerr, Robert A.; Owen, Steven James

2010-03-01

178

LOW NOX COMBUSTION CONCEPTS FOR ADVANCED POWER GENERATION SYSTEMS FIRING LOW-BTU GAS  

EPA Science Inventory

The report gives results of an analysis of several advanced power generating concepts firing low-Btu gasified coal. A combined gas-turbine/steam-cycle power plant with integrated gasifier was the most promising from fuel utilization and economic viewpoints. Two representative com...

179

Advanced Research in Artificial Intelligence132 METHODOLOGY FOR LANGUAGE ANALYSIS AND GENERATION  

E-print Network

Advanced Research in Artificial Intelligence132 METHODOLOGY FOR LANGUAGE ANALYSIS AND GENERATION the text translation pertaining to specific thematic fields (technical manuals, weather forecast, reports components, with the additional challenge that being an artificial language it has to be as expressive

Cardeñosa, Jesús

180

KELVIN: A Second Generation Land Vehicle 2002 Florida Conference on Recent Advances in Robotics  

E-print Network

KELVIN: A Second Generation Land Vehicle 2002 Florida Conference on Recent Advances in Robotics May: Autonomous Navigation, Robotics, Linux Abstract Kelvin is a four-wheeled land-based robotics research, and headlights. 2. The Mobile Platform 2.1 Frame Kelvin's frame, shown in Figure 1, is constructed of welded

Schwartz, Eric M.

181

Dashboard Videos  

ERIC Educational Resources Information Center

Last school year, I had a web link emailed to me entitled "A Dashboard Physics Lesson." The link, created and posted by Dale Basier on his "Lab Out Loud" blog, illustrates video of a car's speedometer synchronized with video of the road. These two separate video streams are compiled into one video that students can watch and analyze. After seeing…

Gleue, Alan D.; Depcik, Chris; Peltier, Ted

2012-01-01

182

Advanced Subcritical Assistance Radioisotope Thermoelectric Generator: An Imperative Solution for the Future of NASA Exploration  

NASA Astrophysics Data System (ADS)

A new generation of radioisotope thermoelectrical generator is proposed for very long space exploration missions. The Advanced Subcritical Assistance Radioisotope Thermoelectric Generator (ASA-RTG) amplify the power from natural decay of pu-238 by a small subcritical multiplication produced from the small neutron background generated from (?, n) reactions between the ? particles from Pu-238 and beryllium, lithium or other low-Z isotope, extracting the maximum advantage and performance from the precious ? disintegration, and then of the very scarce pu-238. The process is self controlled by the natural decay of Pu-238 with the progressive reduction of the power output (RTG) and additionally and simultaneously compensate by the natural decay of a neutronic poisson which increase simultaneously the subcritical multiplication resulting in a contrary effect, i.e., causing an increase in the power. ASA-RTG is not in conflict with previous RTG, and could fit within the type of Radioisotope Thermoelectric Generator developed for NASA space missions as the Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) and the Advanced Stirling Radioisotope Generator (ASRG).

Arias, F. J.

183

Advanced Fuel Cycle Initiative - Projected Linear Heat Generation Rate and Burnup Calculations  

SciTech Connect

This report provides documentation of the physics analysis performed to determine the linear heat generation rate (LHGR) and burnup calculations for the Advanced Fuel Cycle Initiative (AFCI) tests, AFC-1D, AFC-1H, and AFC-1G. The AFC-1D and AFC-1H tests consists of low-fertile metallic fuel compositions and the AFC-1G test consists of non-fertile and low-fertile nitride compositions. These tests will be irradiated in the East Flux Trap (EFT) positions E1, E2, and E3, respectively, during Advanced Test Reactor (ATR) Cycle 135B.

Richard G. Ambrosek; Gray S. Chang; Debbie J. Utterbeck

2005-02-01

184

ATETV Biotech Videos  

NSDL National Science Digital Library

The Advanced Technological Education Television (ATEVT) project develops videos focusing on careers and educational pathways in technology. This particular section of the site features full episodes and video clips about the field of biotechnology, from drug development to agriculture to biomanufacturing. Visitors can learn about the day-to-day lives of practicing technicians, internship opportunities, and the many different community and technical college degree programs to help get started or continue a career in biotechnology.

2012-11-19

185

Technologies and system for automatic generation of advanced geo-spatial products with Chinese satellite imagery  

NASA Astrophysics Data System (ADS)

As an advanced technology, satellite remote sensing has been applied in a variety of fields and has brought numerous social benefits. This paper introduces a new operational satellite imagery processing system and conducts a case study using it by processing ZY-02C and ZY-3 satellite imagery. By way of this case study, this paper proposes a workflow involving the key generation technologies with fully automatic generation of advanced remote sensing products, such as the digital elevation model (DEM), the digital orthophoto map (DOM), and the high-resolution color-fused image. The proposed workflow in this system tackles the key practical issues related to the domestic satellite imagery process, such as low processing efficiency, low utilization, poor integration, etc. This system utilizes the following key generation technologies: automatic registration between the satellite imagery and the existing multi-geographic data, strip aerial triangulation of three-line array satellite images, multi-sensor image registration and fusion, dense matching of photogrammetric point clouds, and automatic correct splicing of wide range images. The proposed process system consists of two parts. The first part is the creation of a geographic information production mode with no manual intervention. This mode aims to improve the accuracy and efficiency of mass domestic satellite images to produce highly precise orientation by using global public basic geographic information databases like Map World, Google Earth, etc. The second part is the design of a workflow to ensure the stability of the production time and quality of domestic satellite imagery's advance product generation. Finally, this paper also discusses the accuracy of the process of image orientation and the precision of advanced products such as high-resolution color-fused image (ZY-02C), DEM (ZY-3), and DOM (ZY-3). The results show that the products of the proposed process system meet the requirements in both efficiency and quality, and the proposed process system is ready for future real-time domestic remote satellite imagery generation.

Zhang, Yongjun; Wang, Bo; Yu, Jin; Chen, Qi; Duan, Yansong; Zhang, Yong; Sun, Mingwei; Ji, Shunping

2014-05-01

186

Advanced magnetic flux compression generator development issues: A comparison of coaxial and disk generators  

NASA Astrophysics Data System (ADS)

Three magnetic flux compression generator (FCG) geometries are reviewed and compared for their suitability as high-current, high-power drivers for z-pinch implosion programs at Los Alamos. They are the inside-out coaxial FCG, the disk FCG, and the outside-in coaxial FCG. A wide range of issues is discussed for each type FCG including current-carrying capability, current densities, robustness, explosive mass and shape, initiation schemes, efficiency, operating times, complexity, and expense associated with development and fabrication. Equations are derived and used in simple scaling studies. The results of these studies are supported by MHD calculations and references to relevant experiments both here and in Russia. The inside-out coaxial FCG is shown to be suitable, both for the very high current applications and for anticipated future Trailmaster concepts. Based upon this analysis and results reported in the Russian literature, the inside-out coaxial FCG is more suitable than the disk FCG for the high-current applications considered, and the two are roughly equivalent when applied to lower-current Trailmaster concepts. The outside-in coaxial FCG is unsuitable for either application because of its limited current-carrying capability and the large investment required for initial development.

Sheppard, M. G.; Freeman, B. L.

1993-04-01

187

Personalized abstraction of broadcasted American football video by highlight selection  

Microsoft Academic Search

Video abstraction is defined as creating shorter video clips or video posters from an original video stream. In this paper, we propose a method of generating a personalized abstract of broadcasted American football video. We first detect significant events in the video stream by matching textual overlays appearing in an image frame with the descriptions of gamestats in which highlights

Noboru Babaguchi; Yoshihiko Kawai; Takehiro Ogura; Tadahiro Kitahashi

2004-01-01

188

Are They Listening Better? Supporting EFL College Students' DVD Video Comprehension with Advance Organizers in a Multimedia English Course  

ERIC Educational Resources Information Center

As technology continues to evolve, authentic multimedia-based teaching materials are widely used in the English as a Foreign Language (EFL) classrooms. However, they may lie beyond most language learners' proficiency level. The purpose of this study was to investigate the use of advance organizers in conjunction with the cognitive theory of…

Li, Chen-Hong

2012-01-01

189

Selection of the reference steam generator for the advanced liquid metal reactor  

SciTech Connect

In February 2006 President Bush announced the Advanced Energy Initiative, which included the Department of Energy's (DOE) Global Nuclear Energy Partnership (GNEP). GNEP has seven broad goals; one of the major elements being to develop and deploy advanced nuclear fuel recycling technology that includes consuming spent nuclear fuel in an Advanced Recycling Reactor (ARR). DOE is contemplating accelerating the deployment of these technologies to achieve the construction of a commercial scale application of these technologies. DOE now defines this approach as 'two simultaneous tracks: (1) deployment of commercial scale facilities for which advanced technologies are available now or in the near future, and (2) further research and development of transmutation fuels technologies'. GEHitachi Nuclear Energy Americas LLC (GHNEA) believes an integrated technical solution is achievable in the near term to accelerate the commercial demonstration of GNEP infrastructure. The GHNEA ARR concept involves a single integrated recycling facility sized to service a single reactor module ARR capable of destroying light water and fast reactor sourced actinides. This paper describes the bases and rationale behind the selection of the helical coil steam generator (HCSG) as the reference steam generator concept for the ALMR and S-PRISM reactor concepts. (authors)

Loewen, Eric P.; Boardman, Chuck [GE-Hitachi Nuclear Energy Americas LLC, Wilmington, NC 28401 (United States)

2007-07-01

190

Generation of electron beams from a laser-based advanced accelerator at Shanghai Jiao Tong University  

E-print Network

At Shanghai Jiao Tong University, we have established a research laboratory for advanced acceleration research based on high-power lasers and plasma technologies. In a primary experiment based on the laser wakefield acceleration (LWFA) scheme, multi-hundred MeV electron beams having a reasonable quality are generated using 20-40 TW, 30 femtosecond laser pulses interacting independently with helium, neon, nitrogen and argon gas jet targets. The laser-plasma interaction conditions are optimized for stabilizing the electron beam generation from each type of gas. The electron beam pointing angle stability and divergence angle as well as the energy spectra from each gas jet are measured and compared.

Elsied, Ahmed M M; Li, Song; Mirzaie, Mohammad; Sokollik, Thomas; Zhang, Jie

2014-01-01

191

Three-directional motion compensation-based novel-look-up-table for video hologram generation of three-dimensional objects freely maneuvering in space.  

PubMed

A new three-directional motion compensation-based novel-look-up-table (3DMC-NLUT) based on its shift-invariance and thin-lens properties, is proposed for video hologram generation of three-dimensional (3-D) objects moving with large depth variations in space. The input 3-D video frames are grouped into a set of eight in sequence, where the first and remaining seven frames in each set become the reference frame (RF) and general frames (GFs), respectively. Hence, each 3-D video frame is segmented into a set of depth-sliced object images (DOIs). Then x, y, and z-directional motion vectors are estimated from blocks and DOIs between the RF and each of the GFs, respectively. With these motion vectors, object motions in space are compensated. Then, only the difference images between the 3-directionally motion-compensated RF and each of the GFs are applied to the NLUT for hologram calculation. Experimental results reveal that the average number of calculated object points and the average calculation time of the proposed method have been reduced compared to those of the conventional NLUT, TR-NLUT and MPEG-NLUT by 38.14%, 69.48%, and 67.41% and 35.30%, 66.39%, and 64.46%, respectively. PMID:25090509

Dong, Xiao-Bin; Kim, Seung-Cheol; Kim, Eun-Soo

2014-07-14

192

Advanced real-time dynamic scene generation techniques for improved performance and fidelity  

Microsoft Academic Search

Recent advances in real-time synthetic scene generation for Hardware-in-the-loop (HWIL) testing at the U.S. Army Aviation and Missile Command (AMCOM) Aviation and Missile Research, Development, and Engineering Center (AMRDEC) improve both performance and fidelity. Modeling ground target scenarios requires tradeoffs because of limited texture memory for imagery and limited main memory for elevation data. High- resolution insets have been used

Mark H. Bowden; James A. Buford; Anthony J. Mayhall

2000-01-01

193

Advanced Architectures for 0.18-0.12?m CMOS Generations  

Microsoft Academic Search

This paper attempts to answer the question of why we should deviate from the scaling theory by accepting some new device architectures, and the reason for this, within the frame of 0.18-0.12?m generations. Next we analyze theoretically and experimentally the advantages and disadvantages of a certain number of advanced device architectures such as: GP (ground plane), heterostructures, mid-gap gate etc.

Thomas Skotnicki

1996-01-01

194

Applications study of advanced power generation systems utilizing coal-derived fuels, volume 2  

NASA Technical Reports Server (NTRS)

Technology readiness and development trends are discussed for three advanced power generation systems: combined cycle gas turbine, fuel cells, and magnetohydrodynamics. Power plants using these technologies are described and their performance either utilizing a medium-Btu coal derived fuel supplied by pipeline from a large central coal gasification facility or integrated with a gasification facility for supplying medium-Btu fuel gas is assessed.

Robson, F. L.

1981-01-01

195

The role of advanced technology in the future of the power generation industry  

SciTech Connect

This presentation reviews the directions that technology has given the power generation industry in the past and how advanced technology will be the key for the future of the industry. The topics of the presentation include how the industry`s history has defined its culture, how today`s economic and regulatory climate has constrained its strategy, and how certain technology options might give some of the players an unfair advantage.

Bechtel, T.F.

1994-10-01

196

Efficient Similarity Search by Summarization in Large Video Database  

Microsoft Academic Search

With the explosion of video data, video processing technologies have advanced quickly and been applied into many flelds, such as advertisements, medical etc.. To fast search these video data, an important issue is to efiectively organize videos by data compacting and indexing. However, practically, many useful distances for video comparison are suitable to human perception, but non-metric. Therefore, traditional high

Xiangmin Zhou; Xiaofang Zhou; Heng Tao Shen

2007-01-01

197

Autism Risk Across Generations: A Population Based Study of Advancing Grandpaternal and Paternal Age  

PubMed Central

Context Advancing paternal age has been linked to autism. Objective To further expand knowledge about the relation between paternal age and autism by studying the effect of grandfathers’ age on childhood autism. Design Population-based multigenerational case-control study. Setting Nationwide Multi-Generation and Patient registers in Sweden. Participants We conducted a study of individuals born in Sweden since 1932. Parental age at birth was obtained for over 90% of the cohort. Grandparental age at the time of birth of the parent was obtained for a smaller subset (5,936 cases and 30,923 controls). Main Outcome Measures International Classification of Diseases (ICD) diagnosis of childhood autism in the Patient Registry. Results There was a statistically significant monotonic association between advancing grandpaternal age at the time of birth of the parent and risk of autism in grandchildren. Men who had a daughter when they were 50 or older were 1.79 times (95% confidence interval: 1.35-2.37, p<0.001) more likely to have a grandchild with autism, and men who had a son when they were 50 or older were 1.67 times (95% confidence interval: 1.35-2.37, p<0.001) more likely to have a grandchild with autism, compared to men who had children when they were 20-24, after controlling for birth year, sex, age of the spouse, family history of psychiatric disorders, highest family education and residential county. There was also a statistically significant monotonic association between advancing paternal age and risk of autism in the offspring. Sensitivity analyses indicated that these findings were not the result of bias due to missing data on grandparental age. Conclusion Advanced grandparental age was associated with increased risk of autism, suggesting that risk for autism could develop over generations. The results are consistent with mutations and/or epigenetic alterations associated with advancing paternal age. PMID:23553111

Frans, Emma M; Sandin, Sven; Reichenberg, Abraham; Langstrom, Niklas; Lichtenstein, Paul; McGrath, John J; Hultman, Christina M

2013-01-01

198

Dynamic Behavior in Fingerprint Videos  

Microsoft Academic Search

Traditional fingerprint acquisition is limited to a single image capture and processing. With the advent of faster capture\\u000a hardware, faster processors, and advances in video compression standards, newer systems capture and exploit video signals\\u000a for tasks that are difficult using single images. In this chapter, we propose the use of fingerprint video sequences to investigate\\u000a dynamic behaviors of fingerprints across

Chitra Dorai; Nalini Ratha; Ruud Bolle

199

"We're from the Generation that was Raised on Television": A Qualitative Exploration of Media Imagery in Elementary Preservice Teachers' Video Production  

ERIC Educational Resources Information Center

In this article, the authors present their analysis of preservice teachers video production. Twenty-eight students in the first authors Social Foundations of the Elementary Curriculum course produced a 5 to 10 minute video as the major assignment for the class, interviews were conducted with six of the seven video production groups and the videos

Hayes, Michael T.; Petrie, Gina Mikel

2006-01-01

200

The multispectral advanced volumetric real-time imaging compositor for real-time distributed scene generation  

NASA Astrophysics Data System (ADS)

AMRDEC has developed the Multi-spectral Advanced Volumetric Real-time Imaging Compositor (MAVRIC) prototype for distributed real-time hardware-in-the-loop (HWIL) scene generation. MAVRIC is a dynamic object-based energy conserved scene compositor that can seamlessly convolve distributed scene elements into temporally aligned physicsbased scenes for enhancing existing AMRDEC scene generation codes. The volumetric compositing process accepts input independent of depth order. This real-time compositor framework is built around AMRDEC's ContinuumCore API which provides the common messaging interface leveraging the Neutral Messaging Language (NML) for local, shared memory, reflective memory, network, and remote direct memory access (RDMA) communications and the Joint Signature Image Generator (JSIG) that provides energy conserved scene component interface at each render node. This structure allows for a highly scalable real-time environment capable of rendering individual objects at high fidelity while being considerate of real-time hardware-in-the-loop concerns, such as latency. As such, this system can be scaled to handle highly complex detailed scenes such as urban environments. This architecture provides the basis for common scene generation as it provides disparate scene elements to be calculated by various phenomenology codes and integrated seamlessly into a unified composited environment. This advanced capability is the gateway to higher fidelity scene generation such as ray-tracing. The high speed interconnects using PCI Express and InfiniBand were examined to support distributed scene generation whereby the scene graph, associated phenomenology, and the scene elements can be dynamically distributed across multiple high performance computing assets to maximize system performance.

Morris, Joseph W.; Ballard, Gary H.; Bunfield, Dennis H.; Peddycoart, Thomas E.; Trimble, Darian E.

2011-06-01

201

Development of a Power Electronics Controller for the Advanced Stirling Radioisotope Generator  

NASA Technical Reports Server (NTRS)

Under a U.S. Department of Energy program for radioisotope power systems, Lockheed Martin is developing an Engineering Unit of the Advanced Stirling Radioisotope Generator (ASRG). This is an advanced version of the previously reported SRG110 generator. The ASRG uses Advanced Stirling Convertors (ASCs) developed by Sunpower Incorporated under a NASA Research Announcement contract. The ASRG makes use of a Stirling controller based on power electronics that eliminates the tuning capacitors. The power electronics controller synchronizes dual-opposed convertors and maintains a fixed frequency operating point. The controller is single-fault tolerant and uses high-frequency pulse width modulation to create the sinusoidal currents that are nearly in phase with the piston velocity, eliminating the need for large series tuning capacitors. Sunpower supports this effort through an extension of their controller development intended for other applications. Glenn Research Center (GRC) supports this effort through system dynamic modeling, analysis and test support. The ASRG design arrived at a new baseline based on a system-level trade study and extensive feedback from mission planners on the necessity of single-fault tolerance. This paper presents the baseline design with an emphasis on the power electronics controller detailed design concept that will meet space mission requirements including single fault tolerance.

Leland, Douglas K.; Priest, Joel F.; Keiter, Douglas E.; Schreiber, Jeffrey G.

2008-01-01

202

Technologies for CO{sub 2}-capture from advanced power-generation systems  

SciTech Connect

The US power-generation industry generated about 1.5 billion metric tons of CO{sub 2} in 1990, with over 95% of that CO{sub 2} being generated by coal-fired utility boilers. Extensive use of coal for power generation is expected to continue for many years to come. Therefore, should capture and sequestration of CO{sub 2} be necessary, coal-fired power plants are likely to be primary targets for CO{sub 2} capture. This paper discusses opportunities and techniques for the capture of CO{sub 2} from the advanced power-generation systems that appear to be the leading candidates for widespread commercialization in the next two decades: integrated coal gasification-combined cycle (IGCC) and fuel cells. Retrofitting of conventional power plants for burning coal with O{sub 2} to facilitate CO{sub 2} capture was also investigated. A brief discussion of the impact of the CO{sub 2}-capture technology on the cost of power generation is also presented. Research and development needs of the CO{sub 2}-capture technologies are also identified. The results indicate that CO{sub 2} recovery from IGCC and fuel-cell plants is less complicated, less energy-intensive, and less costly than its recovery from conventional coal-fired power stations.

Wolsky, A.M.; Daniels, E.J.; Jody, B.J.

1993-06-01

203

External Magnetic Field Reduction Techniques for the Advanced Stirling Radioisotope Generator  

NASA Technical Reports Server (NTRS)

Linear alternators coupled to high efficiency Stirling engines are strong candidates for thermal-to-electric power conversion in space. However, the magnetic field emissions, both AC and DC, of these permanent magnet excited alternators can interfere with sensitive instrumentation onboard a spacecraft. Effective methods to mitigate the AC and DC electromagnetic interference (EMI) from solenoidal type linear alternators (like that used in the Advanced Stirling Convertor) have been developed for potential use in the Advanced Stirling Radioisotope Generator. The methods developed avoid the complexity and extra mass inherent in data extraction from multiple sensors or the use of shielding. This paper discusses these methods, and also provides experimental data obtained during breadboard testing of both AC and DC external magnetic field devices.

Niedra, Janis M.; Geng, Steven M.

2013-01-01

204

High-Temperature Structures, Adhesives, and Advanced Thermal Protection Materials for Next-Generation Aeroshell Design  

NASA Technical Reports Server (NTRS)

The next generation of planetary exploration vehicles will rely heavily on robust aero-assist technologies, especially those that include aerocapture. This paper provides an overview of an ongoing development program, led by NASA Langley Research Center (LaRC) and aimed at introducing high-temperature structures, adhesives, and advanced thermal protection system (TPS) materials into the aeroshell design process. The purpose of this work is to demonstrate TPS materials that can withstand the higher heating rates of NASA's next generation planetary missions, and to validate high-temperature structures and adhesives that can reduce required TPS thickness and total aeroshell mass, thus allowing for larger science payloads. The effort described consists of parallel work in several advanced aeroshell technology areas. The areas of work include high-temperature adhesives, high-temperature composite materials, advanced ablator (TPS) materials, sub-scale demonstration test articles, and aeroshell modeling and analysis. The status of screening test results for a broad selection of available higher-temperature adhesives is presented. It appears that at least one (and perhaps a few) adhesives have working temperatures ranging from 315-400 C (600-750 F), and are suitable for TPS-to-structure bondline temperatures that are significantly above the traditional allowable of 250 C (482 F). The status of mechanical testing of advanced high-temperature composite materials is also summarized. To date, these tests indicate the potential for good material performance at temperatures of at least 600 F. Application of these materials and adhesives to aeroshell systems that incorporate advanced TPS materials may reduce aeroshell TPS mass by 15% - 30%. A brief outline is given of work scheduled for completion in 2006 that will include fabrication and testing of large panels and subscale aeroshell test articles at the Solar-Tower Test Facility located at Kirtland AFB and operated by Sandia National Laboratories. These tests are designed to validate aeroshell manufacturability using advanced material systems, and to demonstrate the maintenance of bondline integrity at realistically high temperatures and heating rates. Finally, a status is given of ongoing aeroshell modeling and analysis efforts which will be used to correlate with experimental testing, and to provide a reliable means of extrapolating to performance under actual flight conditions. The modeling and analysis effort includes a parallel series of experimental tests to determine TSP thermal expansion and other mechanical properties which are required for input to the analysis models.

Collins, Timothy J.; Congdon, William M.; Smeltzer, Stanley S.; Whitley, Karen S.

2005-01-01

205

Monolithic solid oxide fuel cell technology advancement for coal- based power generation  

SciTech Connect

The program is conducted by a team consisting of AiResearch Los Angeles Division of Allied-Signal Aerospace Company and Argonne National Laboratory (ANL). The objective of the program is to advance materials and fabrication methodologies to develop a monolithic solid oxide fuel cell (MSOFC) system capable of meeting performance, life, and cost goals for coal-based power generation. The program focuses on materials research and development, fabrication process development, cell/stack performance testing and characterization, cost and system analysis, and quality development.

Not Available

1992-01-15

206

Monolithic solid oxide fuel cell technology advancement for coal-based power generation  

SciTech Connect

The program is conducted by a team consisting of AiResearch Los Angeles Division of Allied-Signal Aerospace Company and Argonne National Laboratory (ANL). The objective of the program is to advance materials and fabrication methodologies to develop a monolithic solid oxide fuel cell (MSOFC) system capable of meeting performance, life, and cost goals for coal-based power generation. The program focuses on materials research and development, fabrication process development, cell/stack performance testing and characterization, cost and system analysis, and quality development.

Not Available

1992-04-14

207

Monolithic solid oxide fuel cell technology advancement for coal- based power generation. Quarterly report, December 1991  

SciTech Connect

The program is conducted by a team consisting of AiResearch Los Angeles Division of Allied-Signal Aerospace Company and Argonne National Laboratory (ANL). The objective of the program is to advance materials and fabrication methodologies to develop a monolithic solid oxide fuel cell (MSOFC) system capable of meeting performance, life, and cost goals for coal-based power generation. The program focuses on materials research and development, fabrication process development, cell/stack performance testing and characterization, cost and system analysis, and quality development.

Not Available

1992-01-15

208

The Advanced Light Source: A third-generation Synchrotron Radiation Source  

SciTech Connect

The Advanced Light Source (ALS) at the E.O. Lawrence Berkeley National Laboratory (Berkeley Lab) of the University of California is a ''third-generation'' synchrotron radiation source optimized for highest brightness at ultraviolet and soft x-ray photon energies. It also provides world-class performance at hard x-ray photon energies. Berkeley Lab operates the ALS for the United States Department of Energy as a national user facility that is available 24 hours/day around the year for research by scientists from industrial, academic, and government laboratories primarily from the United States but also from abroad.

Robinson, Arthur L.

2002-08-14

209

Social Properties of Mobile Video  

NASA Astrophysics Data System (ADS)

Mobile video is now an everyday possibility with a wide array of commercially available devices, services, and content. These new technologies have created dramatic shifts in the way video-based media can be produced, consumed, and delivered by people beyond the familiar behaviors associated with fixed TV and video technologies. Such technology revolutions change the way users behave and change their expectations in regards to their mobile video experiences. Building upon earlier studies of mobile video, this paper reports on a study using diary techniques and ethnographic interviews to better understand how people are using commercially available mobile video technologies in their everyday lives. Drawing on reported episodes of mobile video behavior, the study identifies the social motivations and values underpinning these behaviors that help characterize mobile video consumption beyond the simplistic notion of viewing video only to kill time. This paper also discusses the significance of user-generated content and the usage of video in social communities through the description of two mobile video technology services that allow users to create and share content. Implications for adoption and design of mobile video technologies and services are discussed as well.

Mitchell, April Slayden; O'Hara, Kenton; Vorbau, Alex

210

A generic video analysis and segmentation system  

Microsoft Academic Search

A generic video analysis system for supervised and unsupervised segmentation is described. The idea behind the presented concept is to integrate different advanced segmentation techniques to obtain a robust, efficient and modular segmentation system for natural video and still images. The system entails several independent modules. Each one of these modules encapsulates a complete video processing technique The intermediate results

Ebroul Izquierdo; Jianhui Xia; Roland Mech

2002-01-01

211

Dynamic behavior analysis in compressed fingerprint videos  

Microsoft Academic Search

Traditional fingerprint acquisition is limited to single-image capture and processing. With the advent of faster capture hardware, faster processors, and advances in video compression standards, newer systems can capture and exploit video signals for tasks that are difficult using a single image. We propose the use of fingerprint video sequences to investigate detecting two aspects of the dynamic behavior of

Chitra Dorai; Nalini K. Ratha; Ruud M. Bolle

2004-01-01

212

Advanced Development Projects for Constellation From The Next Generation Launch Technology Program Elements  

NASA Technical Reports Server (NTRS)

When United States President George W. Bush announced the Vision for Space Exploration in January 2004, twelve propulsion and launch system projects were being pursued in the Next Generation Launch Technology (NGLT) Program. These projects underwent a review for near-term relevance to the Vision. Subsequently, five projects were chosen as advanced development projects by NASA s Exploration Systems Mission Directorate (ESMD). These five projects were Auxiliary Propulsion, Integrated Powerhead Demonstrator, Propulsion Technology and Integration, Vehicle Subsystems, and Constellation University Institutes. Recently, an NGLT effort in Vehicle Structures was identified as a gap technology that was executed via the Advanced Development Projects Office within ESMD. For all of these advanced development projects, there is an emphasis on producing specific, near-term technical deliverables related to space transportation that constitute a subset of the promised NGLT capabilities. The purpose of this paper is to provide a brief description of the relevancy review process and provide a status of the aforementioned projects. For each project, the background, objectives, significant technical accomplishments, and future plans will be discussed. In contrast to many of the current ESMD activities, these areas are providing hardware and testing to further develop relevant technologies in support of the Vision for Space Exploration.

Huebner, Lawrence D.; Saiyed, Naseem H.; Swith, Marion Shayne

2005-01-01

213

Use of MODIS 16-day albedos in generating GOES-R advanced baseline imager imagery  

NASA Astrophysics Data System (ADS)

Advanced preparation for satellite data from the next-generation GOES-R advanced baseline imager (ABI) is supported by coupling high resolution mesoscale and radiative transfer numerical models. Calculated GOES-R ABI imagery is produced in a two-step process. First, a mesoscale model is used to simulate an event over a region with 400 m horizontal grid spacings; secondly, output from the mesoscale model is used as input to a second model that calculates top of the atmosphere radiances at selected GOES-R ABI wavelengths. Such radiances or brightness temperatures are referred to as synthetic imagery. In order for the synthetic imagery to contain realistic horizontal variability of values of surface reflectance at wavelengths from 0.44 to 2.25 ?m, MODIS 16-day albedos are incorporated in the radiative transfer calculations. One application of synthetic GOES-R imagery is that of algorithm development and testing. Algorithms may focus on, but are not limited to, the detection and retrieval of smoke, volcanic ash, fires, blowing dust, and the state of surface physiography. Proper identification of such features is, at times, dependent on the horizontal variability of surface reflectance values. MODIS 16-day spectrally dependent albedos are a valuable dataset in aiding the generation of synthetic GOES-R imagery.

Grasso, Lewis; Hillger, Donald W.; Schaaf, Crystal Barker; Wang, Zhuosen; Brummer, Renate; DeMaria, Robert

2013-01-01

214

Advanced glycation end products delay corneal epithelial wound healing through reactive oxygen species generation.  

PubMed

Delayed healing of corneal epithelial wounds is a serious complication in diabetes. Advanced glycation end products (AGEs) are intimately associated with the diabetic complications and are deleterious to the wound healing process. However, the effect of AGEs on corneal epithelial wound healing has not yet been evaluated. In the present study, we investigated the effect of AGE-modified bovine serum albumin (BSA) on corneal epithelial wound healing and its underlying mechanisms. Our data showed that AGE-BSA significantly increased the generation of intracellular ROS in telomerase-immortalized human corneal epithelial cells. However, the generation of intracellular ROS was completely inhibited by antioxidant N-acetylcysteine (NAC), anti-receptor of AGEs (RAGE) antibodies, or the inhibitor of NADPH oxidase. Moreover, AGE-BSA increased NADPH oxidase activity and protein expression of NADPH oxidase subunits, p22phox and Nox4, but anti-RAGE antibodies eliminated these effects. Furthermore, prevention of intracellular ROS generation using NAC or anti-RAGE antibodies rescued AGE-BSA-delayed epithelial wound healing in porcine corneal organ culture. In conclusion, our results demonstrated that AGE-BSA impaired corneal epithelial wound healing ex vivo. AGE-BSA increased intracellular ROS generation through NADPH oxidase activation, which accounted for the delayed corneal epithelial wound healing. These results may provide better insights for understanding the mechanism of delayed healing of corneal epithelial wounds in diabetes. PMID:23955437

Shi, Long; Chen, Hongmei; Yu, Xiaoming; Wu, Xinyi

2013-11-01

215

Involvement of advanced glycation end product-induced asymmetric dimethylarginine generation in endothelial dysfunction.  

PubMed

Asymmetric dimethylarginine (ADMA), an endogenous nitric oxide synthase inhibitor, plays a role in endothelial dysfunction, an initial step of atherosclerosis. Advanced glycation end products (AGEs) also contribute to accelerated atherosclerosis. However, a pathophysiological crosstalk between ADMA and AGEs remains unclear. In this study, we investigated the relationship between ADMA and AGE level in patients with end-stage renal disease (ESRD) due to diabetic nephropathy. We also examined whether and how AGEs increased ADMA generation by cultured endothelial cells (ECs). Plasma ADMA levels were positively associated with serum AGE level and were inversely correlated with endothelial function determined by flow-mediated vasodilatation. AGEs dose dependently increased reactive oxygen species (ROS) generation in ECs, which was blocked by antisense DNA raised against receptor for AGEs (RAGE). Furthermore, AGEs decreased messenger RNA (mRNA) level of dimethylarginine dimethylaminohydrolase (DDAH)-II, an enzyme for ADMA degradation, reduced its total enzymatic activity and resultantly increased ADMA, all of which were completely blocked by an antioxidant, N-acetylcysteine. These results suggest that the AGE-RAGE-mediated ROS generation could be involved in endothelial dysfunction in diabetic ESRD patients partly by increasing the ADMA generation via suppression of DDAH activity in ECs. PMID:23766377

Ando, Ryotaro; Ueda, Seiji; Yamagishi, Sho-ichi; Miyazaki, Hiroshi; Kaida, Yusuke; Kaifu, Kumiko; Yokoro, Miyuki; Nakayama, Yosuke; Obara, Nana; Fukami, Kei; Takeuchi, Masayoshi; Okuda, Seiya

2013-09-01

216

Scalable Video transmission on overlay networks Tien Anh Le, and Hang Nguyen  

E-print Network

Scalable Video transmission on overlay networks Tien Anh Le, and Hang Nguyen Department of Wireless.Nguyen}@it-sudparis.eu Abstract--Scalable Video Coding is the multi-layer extension of Advanced Video Coding with the advantage. In this research, ad- vanced features of Scalable Video Coding are investigated and compared with Advanced Video

Paris-Sud XI, Université de

217

Waterjet Videos  

NSDL National Science Digital Library

The Waterjet Video Vault contains clips of waterjet machines in action. The video of the foam cutting procedure is especially interesting, as it shows how quick and accurate the machining process can be. Other videos include a waterjet nozzle fired into the air; drawing up a part in CAD, making a tool path, then starting the cut; tilting the cutting head; and cutting 1/2" piece of aluminum. The videos require Windows Media Player, and a link for downloading it is available here.

2008-04-23

218

Dashboard Videos  

NASA Astrophysics Data System (ADS)

Last school year, I had a web link emailed to me entitled "A Dashboard Physics Lesson." The link, created and posted by Dale Basier on his Lab Out Loud blog, illustrates video of a car's speedometer synchronized with video of the road. These two separate video streams are compiled into one video that students can watch and analyze. After seeing this website and video, I decided to create my own dashboard videos to show to my high school physics students. I have produced and synchronized 12 separate dashboard videos, each about 10 minutes in length, driving around the city of Lawrence, KS, and Douglas County, and posted them to a website.2 Each video reflects different types of driving: both positive and negative accelerations and constant speeds. As shown in Fig. 1, I was able to capture speed, distance, and miles per gallon from my dashboard instrumentation. By linking this with a stopwatch, each of these quantities can be graphed with respect to time. I anticipate and hope that teachers will find these useful in their own classrooms, i.e., having physics students watch the videos and create their own motion maps (distance-time, speed-time) for study.

Gleue, Alan D.; Depcik, Chris; Peltier, Ted

2012-11-01

219

Video Compression  

NASA Technical Reports Server (NTRS)

Optivision developed two PC-compatible boards and associated software under a Goddard Space Flight Center Small Business Innovation Research grant for NASA applications in areas such as telerobotics, telesciences and spaceborne experimentation. From this technology, the company used its own funds to develop commercial products, the OPTIVideo MPEG Encoder and Decoder, which are used for realtime video compression and decompression. They are used in commercial applications including interactive video databases and video transmission. The encoder converts video source material to a compressed digital form that can be stored or transmitted, and the decoder decompresses bit streams to provide high quality playback.

1996-01-01

220

Computer animation via optical video disc  

E-print Network

This paper explores the notion of marrying two technologies: raster-scan computer animation and optical video discs. Animated sequences, generated at non real-time rates, then transfered to video disc, can be recalled under ...

Bender, Walter

1981-01-01

221

System identification to characterize human use of ethanol based on generative point-process models of video games with ethanol rewards.  

PubMed

The influence of family history and genetics on the risk for the development of abuse or dependence is a major theme in alcoholism research. Recent research have used endophenotypes and behavioral paradigms to help detect further genetic contributions to this disease. Electronic tasks, essentially video games, which provide alcohol as a reward in controlled environments and with specified exposures have been developed to explore some of the behavioral and subjective characteristics of individuals with or at risk for alcohol substance use disorders. A generative model (containing parameters with unknown values) of a simple game involving a progressive work paradigm is described along with the associated point process signal processing that allows system identification of the model. The system is demonstrated on human subject data. The same human subject completing the task under different circumstances, e.g., with larger and smaller alcohol reward values, is assigned different parameter values. Potential meanings of the different parameter values are described. PMID:22254898

Ozil, Ipek; Plawecki, Martin H; Doerschuk, Peter C; O'Connor, Sean J

2011-01-01

222

Abstract--This paper presents a new approach for generation of super-resolution stereoscopic and multi-view video from  

E-print Network

content into super- resolution 3D is important for content owners. Movies may be reissued in 3D and multi-view video from monocular video. Such multi-view video is used for instance with multi-user 3D--stereoscopic imaging, 2D/3D conversion, structure-from-motion, super-resolution stereo, image-based rendering I

Wichmann, Felix

223

GLOBE Videos  

NSDL National Science Digital Library

This collection of videos, produced by Global Learning and Observations to Benefit the Environment (GLOBE), features overviews of the GLOBE program as well as a variety of science topics. These include Earth as a system, atmospheric science, water chemistry, soil science, land cover, and remote sensing. The videos can be downloaded or viewed directly from the website and are accompanied by written scripts.

The GLOBE Program, University Corporation for Atmospheric Research (UCAR)

224

Video Games.  

PubMed

The emergence of video games as a preferred leisure activity has spurred concern about their effect on adolescent behavior. After reviewing the available research, the author outlines prosocial applications of video games, considers future developments, and presents practical recommendations for players. PMID:10356235

Funk

1993-10-01

225

Video Primal Sketch: A Generic Middle-Level Representation of Video Institute for Information and System Sciences  

E-print Network

Video Primal Sketch: A Generic Middle-Level Representation of Video Zhi Han Zongben Xu Institute This paper presents a middle-level video representation named Video Primal Sketch (VPS), which integrates two. This paper makes three contributions: i) learning a dictionary of video primitives as parametric generative

Zhu, Song Chun

226

Advanced real-time dynamic scene generation techniques for improved performance and fidelity  

NASA Astrophysics Data System (ADS)

Recent advances in real-time synthetic scene generation for Hardware-in-the-loop (HWIL) testing at the U.S. Army Aviation and Missile Command (AMCOM) Aviation and Missile Research, Development, and Engineering Center (AMRDEC) improve both performance and fidelity. Modeling ground target scenarios requires tradeoffs because of limited texture memory for imagery and limited main memory for elevation data. High- resolution insets have been used in the past to provide better fidelity in specific areas, such as in the neighborhood of a target. Improvements for ground scenarios include smooth transitions for high-resolution insets to reduce high spatial frequency artifacts at the borders of the inset regions and dynamic terrain paging to support large area databases. Transport lag through the scene generation system, including sensor emulation and interface components, has been dealt with in the past through the use of sub-window extraction from oversize scenes. This compensates for spatial effects of transport lag but not temporal effects. A new system has been developed and used successfully to compensate for a flashing coded beacon in the scene. Other techniques have been developed to synchronize the scene generator with the seeker under test (SUT) and to model atmospheric effects, sensor optic and electronics, and angular emissivity attenuation.

Bowden, Mark H.; Buford, James A.; Mayhall, Anthony J.

2000-07-01

227

Conceptual design of an advanced Stirling conversion system for terrestrial power generation  

NASA Technical Reports Server (NTRS)

A free piston Stirling engine coupled to an electric generator or alternator with a nominal kWe power output absorbing thermal energy from a nominal 100 square meter parabolic solar collector and supplying electric power to a utility grid was identified. The results of the conceptual design study of an Advanced Stirling Conversion System (ASCS) were documented. The objectives are as follows: define the ASCS configuration; provide a manufacturability and cost evaluation; predict ASCS performance over the range of solar input required to produce power; estimate system and major component weights; define engine and electrical power condidtioning control requirements; and define key technology needs not ready by the late 1980s in meeting efficiency, life, cost, and with goalds for the ASCS.

1988-01-01

228

Battery-free Wireless Sensor Network For Advanced Fossil-Fuel Based Power Generation  

SciTech Connect

This report summarizes technical progress achieved during the project supported by the Department of Energy under Award Number DE-FG26-07NT4306. The aim of the project was to conduct basic research into battery-free wireless sensing mechanism in order to develop novel wireless sensors and sensor network for physical and chemical parameter monitoring in a harsh environment. Passive wireless sensing platform and five wireless sensors including temperature sensor, pressure sensor, humidity sensor, crack sensor and networked sensors developed and demonstrated in our laboratory setup have achieved the objective for the monitoring of various physical and chemical parameters in a harsh environment through remote power and wireless sensor communication, which is critical to intelligent control of advanced power generation system. This report is organized by the sensors developed as detailed in each progress report.

Yi Jia

2011-02-28

229

A Plan for Advanced Guidance and Control Technology for 2nd Generation Reusable Launch Vehicles  

NASA Technical Reports Server (NTRS)

Advanced guidance and control (AG&C) technologies are critical for meeting safety/reliability and cost requirements for the next generation of reusable launch vehicle (RLV). This becomes clear upon examining the number of expendable launch vehicle failures in the recent past where AG&C technologies would have saved a RLV with the same failure mode, the additional vehicle problems where this technology applies, and the costs associated with mission design with or without all these failure issues. The state-of-the-art in guidance and control technology, as well as in computing technology, is at the point where we can took to the possibility of being able to safely return a RLV in any situation where it can physically be recovered. This paper outlines reasons for AG&C, current technology efforts, and the additional work needed for making this goal a reality.

Hanson, John M.; Fogle, Frank (Technical Monitor)

2002-01-01

230

Structured background grids for generation of unstructured grids by advancing front method  

NASA Technical Reports Server (NTRS)

A new method of background grid construction is introduced for generation of unstructured tetrahedral grids using the advancing-front technique. Unlike the conventional triangular/tetrahedral background grids which are difficult to construct and usually inadequate in performance, the new method exploits the simplicity of uniform Cartesian meshes and provides grids of better quality. The approach is analogous to solving a steady-state heat conduction problem with discrete heat sources. The spacing parameters of grid points are distributed over the nodes of a Cartesian background grid by interpolating from a few prescribed sources and solving a Poisson equation. To increase the control over the grid point distribution, a directional clustering approach is used. The new method is convenient to use and provides better grid quality and flexibility. Sample results are presented to demonstrate the power of the method.

Pirzadeh, Shahyar

1991-01-01

231

Three-dimensional unsteady flow calculations in an advanced gas generator turbine  

NASA Technical Reports Server (NTRS)

This paper deals with the application of a three-dimensional, unsteady Navier-Stokes code for predicting the unsteady flow in a single stage of an advanced gas generator turbine. The numerical method solves the three-dimensional thin-layer Navier-Stokes equations, using a system of overlaid grids, which allow for relative motion between the rotor and stator airfoils. Results in the form of time averaged pressures and pressure amplitudes on the airfoil surfaces will be shown. In addition, instantaneous contours of pressure, Mach number, etc. will be presented in order to provide a greater understanding of the inviscid as well as the viscous aspects of the flowfield. Also, relevant secondary flow features such as cross-plane velocity vectors and total pressure contours will be presented. Prior work in two-dimensions has indicated that for the advanced designs, the unsteady interactions can play a significant role in turbine performance. These interactions affect not only the stage efficiency but can substantially alter the time-averaged features of the flow. This work is a natural extension of the work done in two-dimensions and hopes to address some of the issues raised by the two-dimensional calculations. These calculations are being performed as an integral part of an actual design process and demonstrate the value of unsteady rotor-stator interaction calculations in the design of turbomachines.

Rangwalla, Akil A.

1993-01-01

232

Video transmission for telemedicine.  

PubMed

The transmission of moving pictures to remote locations is an important part of telemedicine. Although the first videoconferencing demonstrations were performed in the 1930s, the technology is still fragmented and its quality is sometimes too poor for it to be useful. Conventional television technology is analogue (the fundamental television standards were developed before the Second World War) and does not 'fit' the digital world very well. This paper reviews video transmission and videoconferencing technologies and the results that can be expected. While trained professionals may be able to make use of poor-quality video systems, real advances in telemedicine require studio-quality video, which is possible only with high-bandwidth technology. PMID:10505363

Squibb, N J

1999-01-01

233

Next-generation approaches to advancing eco-immunogenomic research in critically endangered primates.  

PubMed

High-throughput sequencing platforms are generating massive amounts of genomic data from nonmodel species, and these data sets are valuable resources that can be mined to advance a number of research areas. An example is the growing amount of transcriptome data that allow for examination of gene expression in nonmodel species. Here, we show how publicly available transcriptome data from nonmodel primates can be used to design novel research focused on immunogenomics. We mined transcriptome data from the world's most endangered group of primates, the lemurs of Madagascar, for sequences corresponding to immunoglobulins. Our results confirmed homology between strepsirrhine and haplorrhine primate immunoglobulins and allowed for high-throughput sequencing of expressed antibodies (Ig-seq) in Coquerel's sifaka (Propithecus coquereli). Using both Pacific Biosciences RS and Ion Torrent PGM sequencing, we performed Ig-seq on two individuals of Coquerel's sifaka. We generated over 150 000 sequences of expressed antibodies, allowing for molecular characterization of the antigen-binding region. Our analyses suggest that similar VDJ expression patterns exist across all primates, with sequences closely related to the human VH 3 immunoglobulin family being heavily represented in sifaka antibodies. Moreover, the antigen-binding region of sifaka antibodies exhibited similar amino acid variation with respect to haplorrhine primates. Our study represents the first attempt to characterize sequence diversity of the expressed antibody repertoire in a species of lemur. We anticipate that methods similar to ours will provide the framework for investigating the adaptive immune response in wild populations of other nonmodel organisms and can be used to advance the burgeoning field of eco-immunology. PMID:24890011

Larsen, P A; Campbell, C R; Yoder, A D

2014-11-01

234

Supporting Development for the Stirling Radioisotope Generator and Advanced Stirling Technology Development at NASA Glenn  

NASA Technical Reports Server (NTRS)

A high-efficiency, 110-W(sub e) (watts electric) Stirling Radioisotope Generator (SRG110) for possible use on future NASA Space Science missions is being developed by the Department of Energy, Lockheed Martin, Stirling Technology Company (STC), and NASA Glenn Research Center (GRC). Potential mission use includes providing spacecraft onboard electric power for deep space missions and power for unmanned Mars rovers. GRC is conducting an in-house supporting technology project to assist in SRG110 development. One-, three-, and six-month heater head structural benchmark tests have been completed in support of a heater head life assessment. Testing is underway to evaluate the key epoxy bond of the permanent magnets to the linear alternator stator lamination stack. GRC has completed over 10,000 hours of extended duration testing of the Stirling convertors for the SRG110, and a three-year test of two Stirling convertors in a thermal vacuum environment will be starting shortly. GRC is also developing advanced technology for Stirling convertors, aimed at substantially improving the specific power and efficiency of the convertor and the overall generator. Sunpower, Inc. has begun the development of a lightweight Stirling convertor, under a NASA Research Announcement (NRA) award, that has the potential to double the system specific power to about 8 W(sub e) per kilogram. GRC has performed random vibration testing of a lowerpower version of this convertor to evaluate robustness for surviving launch vibrations. STC has also completed the initial design of a lightweight convertor. Status of the development of a multi-dimensional computational fluid dynamics code and high-temperature materials work on advanced superalloys, refractory metal alloys, and ceramics are also discussed.

Thieme, Lanny G.; Schreiber, Jeffrey G.

2005-01-01

235

Generation of large scale urban environments to support advanced sensor and seeker simulation  

NASA Astrophysics Data System (ADS)

One of the key aspects for the design of a next generation weapon system is the need to operate in cluttered and complex urban environments. Simulation systems rely on accurate representation of these environments and require automated software tools to construct the underlying 3D geometry and associated spectral and material properties that are then formatted for various objective seeker simulation systems. Under an Air Force Small Business Innovative Research (SBIR) contract, we have developed an automated process to generate 3D urban environments with user defined properties. These environments can be composed from a wide variety of source materials, including vector source data, pre-existing 3D models, and digital elevation models, and rapidly organized into a geo-specific visual simulation database. This intermediate representation can be easily inspected in the visible spectrum for content and organization and interactively queried for accuracy. Once the database contains the required contents, it can then be exported into specific synthetic scene generation runtime formats, preserving the relationship between geometry and material properties. To date an exporter for the Irma simulation system developed and maintained by AFRL/Eglin has been created and a second exporter to Real Time Composite Hardbody and Missile Plume (CHAMP) simulation system for real-time use is currently being developed. This process supports significantly more complex target environments than previous approaches to database generation. In this paper we describe the capabilities for content creation for advanced seeker processing algorithms simulation and sensor stimulation, including the overall database compilation process and sample databases produced and exported for the Irma runtime system. We also discuss the addition of object dynamics and viewer dynamics within the visual simulation into the Irma runtime environment.

Giuliani, Joseph; Hershey, Daniel; McKeown, David, Jr.; Willis, Carla; Van, Tan

2009-05-01

236

Process latitude comparison of advanced DUV photoresists to latest-generation 193-nm photoresists  

NASA Astrophysics Data System (ADS)

The introduction of resolution enhancement techniques (RETs) and higher numerical aperture (NA) scanners has pushed the capability of 248nm (DUV) processes to below 130nm. This extension of DUV technology has made the decision to insert 193nm difficult. The decision to either extend the current DUV processes or to change to 193nm will depend on several things: mask costs, tool costs, material availability and photoresist performance. The focus of this paper is on photoresist performance. The process latitudes of advanced DUV photoresists are compared to the latest generation of 193nm resists and simulation is used to estimate the performance obtained on the next generation scanners. This paper examines resist process latitude at several feature sizes to determine the strengths and weaknesses of each platform. The feature sizes to be examined include 130nm, 120nm and 110nm with a pitch ratio of 1:1 Lines/Spaces. The resists are processed on the appropriate anti-reflectant and a resist film thickness of approximately 3,000 angstrom is used. The measured lithographic response will be the individual process windows. The examination of each platform's performance will clarify the differences between the two resists on current scanners and estimate the differences on the next generation scanners. The results show experimentally that the current 193nm resist has slightly better process latitudes than the DUV resist for 1:1 Line/Spaces below 130nm. The estimation of performance on the next generation higher NA scanners indicate that the DUV resist will have better performance than the current 193nm resist. However, when the 193nm resists reach the same maturity as the DUV resist and respond to the aerial images accordingly, the 193nm resist will have better process latitude. While few resolution enhancement techniques are used in the experiments, the results do provide a piece of information required to decide between DUV and 193nm.

Joesten, Lori A.; Reilly, Michael T.; Linskens, Frank T.; Jehoul, Christiane; Parker, Colin R.

2001-09-01

237

Visually Lossless H.264 Compression of Natural Videos  

E-print Network

) threshold selection for H.264/AVC (Advanced Video Coding) compressed natural videos spanning a wide range design, where by a series of reference vs. compressed video pairs were displayed to the subjects, whereVisually Lossless H.264 Compression of Natural Videos Anish Mittal, Anush K. Moorthy and Alan C

Bovik, Alan

238

Button Blender: Remixing Input to Improve Video Game Accessibility  

E-print Network

Button Blender: Remixing Input to Improve Video Game Accessibility Abstract Over time, advances in video game system hardware have facilitated the evolution of video game mechanics from simple to complex Interfaces and Presentation: User Interfaces - Input Devices and Strategies Introduction Video games

Kane, Shaun K.

239

Create a mobile video story  

Microsoft Academic Search

The aim of this Artwork & Demo is to present a new mobile social video service and demo platform MoViE that enables users to create mobile narrations and stories using narrative structures. Visitors of the conference will be able to contribute to this service during the conference using their mobile phones or phones available at the booth. Automatically generated video

Jari Multisilta; Marjo Mäenpää

2008-01-01

240

Metadata in video databases  

Microsoft Academic Search

Video is composed of audio-visual information. Providing content based access to video data is essential for the sucessful integration of video into computers. Organizing video for content based access requires the use of video metadata. This paper explores the nature video metadata. A data model for video databases is presented based on a study of the applications of video, the

Ramesh Jain; Arun Hampapur

1994-01-01

241

Video games.  

PubMed

The video game industry insists that it is doing everything possible to provide information about the content of games so that parents can make informed choices; however, surveys indicate that ratings may not reflect consumer views of the nature of the content. This article describes some of the currently popular video games, as well as developments that are on the horizon, and discusses the status of research on the positive and negative impacts of playing video games. Recommendations are made to help parents ensure that children play games that are consistent with their values. PMID:16111624

Funk, Jeanne B

2005-06-01

242

1 Advanced Operations Research Video Prof. G. Srinivasan IIT Madras 3 Introduction to Turbulence Web Prof.G.Biswas IIT Kanpur  

E-print Network

. Singh, Prof. Joesph John IIT Kanpur 14 Basic Electronics and Lab Web Prof. T. S. Natarajan IIT Madras 15. Shanmugam IIT Madras 34 Principles of Mechanical Measurements Video Prof.R.Raman IIT Madras Semester 5 35

Sivalingam, Krishna M.

243

Advances in the RF atomic iodine generator for oxygen-iodine laser  

NASA Astrophysics Data System (ADS)

Recent advances in the RF atomic iodine generator for oxygen-iodine lasers are presented. The generator is based on the RF discharge dissociation of a suitable iodine donor immediately before its injection to the flow of singlet oxygen. The discharge is ignited directly in the iodine injector, and the configuration is ready for the laser operation. The dissociation fraction was derived from the atomic iodine number density measured at a presupposed position of laser resonator. The dissociation fraction and the fraction of RF power spent on the dissociation (discharge dissociation efficiency) were measured for the following donors: CH3I, CF3I and HI. A significant improvement of the discharge stability was achieved by increasing the cross-sectional area of the exit injection holes and employing a tangential inlet of working gas into the discharge chamber. The flow rates 0.15 mmol/s and 0.19 mmol/s of produced atomic iodine were achieved using the HI and CF3I, respectively. The atomic iodine number density in the supersonic flow attained 4.22 × 1014 cm-3. The dissociation efficiency was substantially better for HI than for studied organic iodides.

Jirásek, Vít; Schmiedberger, Josef; ?enský, Miroslav; Kodymová, Jarmila

2010-09-01

244

Status of advanced fuel candidates for Sodium Fast Reactor within the Generation IV International Forum  

NASA Astrophysics Data System (ADS)

The main challenge for fuels for future Sodium Fast Reactor systems is the development and qualification of a nuclear fuel sub-assembly which meets the Generation IV International Forum goals. The Advanced Fuel project investigates high burn-up minor actinide bearing fuels as well as claddings and wrappers to withstand high neutron doses and temperatures. The R&D outcome of national and collaborative programs has been collected and shared between the AF project members in order to review the capability of sub-assembly material and fuel candidates, to identify the issues and select the viable options. Based on historical experience and knowledge, both oxide and metal fuels emerge as primary options to meet the performance and the reliability goals of Generation IV SFR systems. There is a significant positive experience on carbide fuels but major issues remain to be overcome: strong in-pile swelling, atmosphere required for fabrication as well as Pu and Am losses. The irradiation performance database for nitride fuels is limited with longer term R&D activities still required. The promising core material candidates are Ferritic/Martensitic (F/M) and Oxide Dispersed Strengthened (ODS) steels.

Delage, F.; Carmack, J.; Lee, C. B.; Mizuno, T.; Pelletier, M.; Somers, J.

2013-10-01

245

Issues and Advances in Understanding Landslide-Generated Tsunamis: Toward a Unified Model  

NASA Astrophysics Data System (ADS)

The physics of tsunamis generated from submarine landslides is highly complex, involving a cross- disciplinary exchange in geophysics. In the 10 years following the devastating Papua New Guinea tsunami, there have been significant advances in understanding landslide-generated tsunamis. However, persistent issues still remain related to submarine landslide dynamics that may be addressed with collection of new marine geologic and geophysical observations. We review critical elements of landslide tsunamis in the hope of developing a unified model that encompasses all stages of the process from triggering to tsunami runup. Because the majority of non-volcanogenic landslides that generate tsunamis are triggered seismically, advances in understanding inertial displacements and changes in strength and rheologic properties in response to strong-ground motion need to be included in a unified model. For example, interaction between compliant marine sediments and multi-direction ground motion results in greater permanent plastic displacements than predicted by traditional rigid-block analysis. When considering the coupling of the overlying water layer in the generation of tsunamis, the post-failure dynamics of landslides is important since the overall rate of seafloor deformation for landslides is less than or comparable to the phase speed of tsunami waves. As such, the rheologic and mechanical behavior of the slide material needs to be well understood. For clayey and silty debris flows, a non-linear (Herschel-Bulkley) and bilinear rheology have recently been developed to explain observed runout distances and deposit thicknesses. An additional complexity to this rheology is the inclusion of hydrate-laden sediment that commonly occurs along continental slopes. Although it has been proposed in the past that gas hydrate dissociation may provide potential failure planes for slide movement, it is unclear how zones of rigid hydrate-bearing sediment surrounded by a more viscoplastic matrix affects the overall rheologic behavior during slide dynamics. For more rigid materials, such as carbonate and volcanic rocks, models are being developed that encompass the initial fracturing and eventual disintegration associated with debris avalanches. Lastly, the physics dictating the hydrodynamics of landslide-generated tsunamis is equally complex. The effects of non-linearity and dispersion are not necessarily negligible for landslides (in contrast to most earthquake-generated tsunamis), indicating that numerical implementation of the non-linear Boussinesq equations is often needed. Moreover, we show that for near-field landslide tsunamis propagating across the continental shelf, bottom friction (bottom boundary layer turbulence) and wave breaking can be important energy sinks. Detailed geophysical surveys can dissect landslide complexes to determine the geometry of individual events and help estimate rheological properties of the flowing mass, whereas cores in landslide provinces can determine the mechanical properties and pore-pressure distribution for pre- and post-failure sediment. This information is critical toward developing well-documented case histories for validating physics-based landslide tsunami models.

Geist, E. L.; Locat, J.; Lee, H. J.; Lynett, P. J.; Parsons, T.; Kayen, R. E.; Hart, P. E.

2008-12-01

246

Daylighting Video  

NSDL National Science Digital Library

This video introduces the concept of daylighting - the use of windows or skylights for natural lighting and temperature regulation - and how it is one building strategy that can save operating costs for homeowners and businesses.

Energy, Us D.

247

Video Library.  

ERIC Educational Resources Information Center

Reviews videos for early childhood programs that focus on staff training, child care selection, building children's self-esteem, farm animals, and children's books by Judith Viorst and Robert McCloskey. (HOD)

Neugebauer, Bonnie

1993-01-01

248

Digital video watermarking for DVD copy protection  

Microsoft Academic Search

Watermarking is an emerging technology that is claimed to have an important application in copyright protection. In this paper we consider the case of video watermarking for DVD-Video copy protection. An overview is given of the system requirements and its implications for the DVD-Video watermarking technology. In particular we focus on the problem of implementing copy generation control. Finally, we

Ton Kalker

1999-01-01

249

Gabor Difference Analysis of Digital Video Quality  

Microsoft Academic Search

The rapid increase in the development of digital video systems has generated a strong need for objective video quality metrics. Two methods are presented in this work. One is the Gabor difference analysis (GDA) full reference method, and the other is the reverse frame prediction (RFP) no reference video quality method. Both methods are based on the multi-channel properties of

Jing Guo; Michele Van Dyke-Lewis; H. R. Myler

2004-01-01

250

Fast Compressed Domain Motion Detection in H.264 Video Streams for Video Surveillance Applications  

Microsoft Academic Search

This paper presents a novel approach to fast motion detection in H.264\\/MPEG-4 advanced video coding (AVC) compressed video streams for IP video surveillance systems. The goal is to develop algorithms which may be useful in a real-life industrial perspective by facilitating the processing of large numbers of video streams on a single server. The focus of the work is on

Krzysztof Szczerba; Søren Forchhammer; Jesper Stottrup-andersen; Peder Tanderup Eybye

2009-01-01

251

76 FR 21741 - Twenty-First Century Communications and Video Programming Accessibility Act; Announcement of Town...  

Federal Register 2010, 2011, 2012, 2013

...Twenty-First Century Communications and Video Programming Accessibility Act; Announcement...Twenty-First Century Communications and Video Programming Accessibility Act (the Act...discussed the advanced communications and video programming changes required by the...

2011-04-18

252

Detection of asymmetric eye action units in spontaneous videos  

E-print Network

With recent advances in machine vision, automatic detection of human expressions in video is becoming important especially because human labeling of videos is both tedious and error prone. In this paper, we present an ...

el Kaliouby, Rana

253

Short-Term Forecast of Power Generation for Grid-Connected Photovoltaic System Based on Advanced Grey-Markov Chain  

Microsoft Academic Search

As a distributed generation, grid-connected photovoltaic system affects the stability of power system directly. The forecast precision for distributed generation will be useful to the power system planning and operation. According to the operation data, which characteristics are changed in exponent rule and randomness, an advanced Grey-Markov chain model has been applied in short-term forecast of 5.6 kW grid-connected photovoltaic

Ying-Zi Li; Lin He; Ru-Qing Nie

2009-01-01

254

Content-based analysis of news video  

NASA Astrophysics Data System (ADS)

In this paper, we present a schema for content-based analysis of broadcast news video. First, we separate commercials from news using audiovisual features. Then, we automatically organize news programs into a content hierarchy at various levels of abstraction via effective integration of video, audio, and text data available from the news programs. Based on these news video structure and content analysis technologies, a TV news video Library is generated, from which users can retrieve definite news story according to their demands.

Yu, Junqing; Zhou, Dongru; Liu, Huayong; Cai, Bo

2001-09-01

255

Video Center Administrator Guide  

E-print Network

LifeSize® Video Center Administrator Guide March 2011 LifeSize Video Center 2200 #12;LifeSize Video Center Adminstrator Guide 2 Administering LifeSize Video Center LifeSize Video Center is a network server that stores and streams video sent by LifeSize video communications systems enabled for recording. It can also

Eisen, Michael

256

A multiparent advanced generation inter-cross population for genetic analysis in wheat.  

PubMed

We present the first results from a novel multiparent advanced generation inter-cross (MAGIC) population derived from four elite wheat cultivars. The large size of this MAGIC population (1579 progeny), its diverse genetic composition and high levels of recombination all contribute to its value as a genetic resource. Applications of this resource include interrogation of the wheat genome and the analysis of gene-trait association in agronomically important wheat phenotypes. Here, we report the utilization of a MAGIC population for the first time for linkage map construction. We have constructed a linkage map with 1162 DArT, single nucleotide polymorphism and simple sequence repeat markers distributed across all 21 chromosomes. We benchmark this map against a high-density DArT consensus map created by integrating more than 100 biparental populations. The linkage map forms the basis for further exploration of the genetic architecture within the population, including characterization of linkage disequilibrium, founder contribution and inclusion of an alien introgression into the genetic map. Finally, we demonstrate the application of the resource for quantitative trait loci mapping using the complex traits plant height and hectolitre weight as a proof of principle. PMID:22594629

Huang, Bevan E; George, Andrew W; Forrest, Kerrie L; Kilian, Andrzej; Hayden, Matthew J; Morell, Matthew K; Cavanagh, Colin R

2012-09-01

257

Second generation advanced reburning for high efficiency NO(x) control. Progress report, 1196  

SciTech Connect

This project is designed to develop a family of novel NO{sub x} control technologies, called Second Generation Advanced Reburning (SGAR), which has the potential to achieve 90+% NO{sub x} control in coal fired boilers at a significantly lower cost than Selective Catalytic Reduction. Phase I consists of six tasks: Task 1.1 Project Coordination and Reporting/Deliverables; Task 1.2 Kinetics of Na{sub 2}CO{sub 3} Reactions with Flue Gas Components; Task 1.3 O.l x lO{sup 6}Btu/hr Optimization Studies; Task 1.4 1.0 x 10{sup 6} Btu/hr Process Development Tests; Task 1.5 Mechanism Development and Modeling; and Task 1. 6 Design Methodology and Application. The fourth reporting period (July 1 - September 30, 1996) included both experimental and modeling activities. The bench scale CTT experiments (Task 1.3) were completed. The 1 MMBtu/hr Boiler Simulator Facility (BSF) was prepared for the test program and experiments were conducted using natural gas (NG) as main and reburing fuels (Task 1.4). A few preliminary tests were also performed with coal firing. The results have been reduced and are reported. Initial experimental data were obtained on reactions of sodium promoters (Task 1.2) at the University of Texas in Austin (UT). The kinetic model was extended to include reactions of sulfur and sodium (Task 1.5).

Zamansky, V.M.; Maly, P.M.

1996-10-01

258

Future projections of extreme precipitation using Advanced Weather Generator (AWE-GEN) over Peninsular Malaysia  

NASA Astrophysics Data System (ADS)

A stochastic downscaling methodology known as the Advanced Weather Generator, AWE-GEN, has been tested at four stations in Peninsular Malaysia using observations available from 1975 to 2005. The methodology involves a stochastic downscaling procedure based on a Bayesian approach. Climate statistics from a multi-model ensemble of General Circulation Model (GCM) outputs were calculated and factors of change were derived to produce the probability distribution functions (PDF). New parameters were obtained to project future climate time series. A multi-model ensemble was used in this study. The projections of extreme precipitation were based on the RCP 6.0 scenario (2081-2100). The model was able to simulate both hourly and 24-h extreme precipitation, as well as wet spell durations quite well for almost all regions. However, the performance of GCM models varies significantly in all regions showing high variability of monthly precipitation for both observed and future periods. The extreme precipitation for both hourly and 24-h seems to increase in future, while extreme of wet spells remain unchanged, up to the return periods of 10-40 years.

Syafrina, A. H.; Zalina, M. D.; Juneng, L.

2014-09-01

259

Next generation Geostationary Operational Environmental Satellite: GOES-R, the United States' advanced weather sentinel  

NASA Astrophysics Data System (ADS)

The Geostationary Operational Environmental Satellite R-series (GOES-R) is the follow-on to the existing GOES system, completing a transition from 1980's technology to state-of-the-art. The product of a collaborative development effort between NOAA, NASA, DOC and industry, the first GOES-R satellite is planned to be launched in April 2015 with readiness to fully replace the heritage GOES constellation in 2017. This next-generation system will continue as the United States' weather sentinel for forecasting hurricanes, severe storms, and flash floods while providing information about air quality, winds, sea surface temperature, and space weather. It will provide advanced capabilities by providing five times more spectral information, temporal coverage six times faster than the current system, and 50% higher spatial resolution. The heart of the GOES-R system is the ABI instrument, a sixteen-channel imager with six visible channels and 10 infrared channels. The GLM instrument will be the first geostationary sensor to detect and monitor lightning strikes. GOES-R also includes several space environment sensors that will increase the capability to monitor and predict solar flare activity. Additionally, GOES-R will continue to provide heritage search and rescue capabilities, a data collection system, and other direct readout capabilities.

Bloom, Hal J.

2009-08-01

260

Automatic Video Summarization by Affinity Propagation Clustering and Semantic Content Mining  

Microsoft Academic Search

Video summarization has become an indispensable tool of any practical video content management system in large volume video data. In this paper, we propose a novel approach to automatically generate the video summary for broadcast news videos. Firstly, videos are pre-processed by shot detection, key frame extraction, and story segmentation. Then, a clustering algorithm based on affinity propagation (AP) is

Xiao-neng Xie; Fei Wu

2008-01-01

261

Video-based crowd synthesis.  

PubMed

As a controllable medium, video-realistic crowds are important for creating the illusion of a populated reality in special effects, games, and architectural visualization. While recent progress in simulation and motion captured-based techniques for crowd synthesis has focused on natural macroscale behavior, this paper addresses the complementary problem of synthesizing crowds with realistic microscale behavior and appearance. Example-based synthesis methods such as video textures are an appealing alternative to conventional model-based methods, but current techniques are unable to represent and satisfy constraints between video sprites and the scene. This paper describes how to synthesize crowds by segmenting pedestrians from input videos of natural crowds and optimally placing them into an output video while satisfying environmental constraints imposed by the scene. We introduce crowd tubes, a representation of video objects designed to compose a crowd of video billboards while avoiding collisions between static and dynamic obstacles. The approach consists of representing crowd tube samples and constraint violations with a conflict graph. The maximal independent set yields a dense constraint-satisfying crowd composition. We present a prototype system for the capture, analysis, synthesis, and control of video-based crowds. Several results demonstrate the system's ability to generate videos of crowds which exhibit a variety of natural behaviors. PMID:24029912

Flagg, Matthew; Rehg, James M

2013-11-01

262

Teaching Advanced Operation of an iPod-Based Speech-Generating Device to Two Students with Autism Spectrum Disorders  

ERIC Educational Resources Information Center

We evaluated a program for teaching two adolescents with autism spectrum disorders (ASD) to perform more advanced operations on an iPod-based speech-generating device (SGD). The effects of the teaching program were evaluated in a multiprobe multiple baseline across participants design that included two intervention phases. The first intervention…

Achmadi, Donna; Kagohara, Debora M.; van der Meer, Larah; O'Reilly, Mark F.; Lancioni, Giulio E.; Sutherland, Dean; Lang, Russell; Marschik, Peter B.; Green, Vanessa A.; Sigafoos, Jeff

2012-01-01

263

Video Nation  

NSDL National Science Digital Library

The British have long been interested in studying and documenting various forms of social organization and human interaction, and their much-revered BBC has also been involved in letting residents have their say on a number of programs, including the notable âÂÂVideo NationâÂÂ. The program started in the early 1990s, and with the rise of the Internet many of these short vignettes have been folded into this very informative and engaging website. With eighteen regional centers, visitors can view videos from such locations as Kent, Birmingham, and Manchester. Visitors looking for videos on certain topics can delve into the Archive section and look through headings such as Africa, football, lomography, and summer. Other sections of the site allow users to learn more about making a short film and the history of the Video Nation program.

264

LACMA: Video  

NSDL National Science Digital Library

LACMA, the Los Angeles County Museum of Art, makes available a variety of video content on its website. Videos are organized into broad categories, including On View Now, Conservation, and Artist Interviews. Currently, On View Now contains short pieces such as Stephen Prina talking about the exhibition "Stephen Prina: As He Remembered It" and "Shinique Smith: Firsthand," an installation at the Charles White Elementary School in downtown Los Angeles. A whole series of videos documents Michael Heizer's "Levitated Mass," a huge sculpture permanently installed on the LACMA grounds, composed of a 456-foot-long slot topped with a 340-ton granite megalith. Since this is Los Angeles, another section, Film Directors, includes interviews with Debra Granik, talking about the film "Winter's Bone"; Martin Scorsese on film preservation, museums and Hollywood; and Clint Eastwood, "An actor's path toward becoming a director."[DS

265

Advanced Metal-Hydrides-Based Thermal Battery: A New Generation of High Density Thermal Battery Based on Advanced Metal Hydrides  

SciTech Connect

HEATS Project: The University of Utah is developing a compact hot-and-cold thermal battery using advanced metal hydrides that could offer efficient climate control system for EVs. The team’s innovative designs of heating and cooling systems for EVs with high energy density, low-cost thermal batteries could significantly reduce the weight and eliminate the space constraint in automobiles. The thermal battery can be charged by plugging it into an electrical outlet while charging the electric battery and it produces heat and cold through a heat exchanger when discharging. The ultimate goal of the project is a climate-controlling thermal battery that can last up to 5,000 charge and discharge cycles while substantially increasing the driving range of EVs, thus reducing the drain on electric batteries.

None

2011-12-01

266

Next Generation Life Support Project: Development of Advanced Technologies for Human Exploration Missions  

NASA Technical Reports Server (NTRS)

Next Generation Life Support (NGLS) is one of several technology development projects sponsored by the National Aeronautics and Space Administration s Game Changing Development Program. NGLS is developing life support technologies (including water recovery, and space suit life support technologies) needed for humans to live and work productively in space. NGLS has three project tasks: Variable Oxygen Regulator (VOR), Rapid Cycle Amine (RCA) swing bed, and Alternative Water Processing. The selected technologies within each of these areas are focused on increasing affordability, reliability, and vehicle self sufficiency while decreasing mass and enabling long duration exploration. The RCA and VOR tasks are directed at key technology needs for the Portable Life Support System (PLSS) for an Exploration Extravehicular Mobility Unit (EMU), with focus on prototyping and integrated testing. The focus of the Rapid Cycle Amine (RCA) swing-bed ventilation task is to provide integrated carbon dioxide removal and humidity control that can be regenerated in real time during an EVA. The Variable Oxygen Regulator technology will significantly increase the number of pressure settings available to the space suit. Current spacesuit pressure regulators are limited to only two settings while the adjustability of the advanced regulator will be nearly continuous. The Alternative Water Processor efforts will result in the development of a system capable of recycling wastewater from sources expected in future exploration missions, including hygiene and laundry water, based on natural biological processes and membrane-based post treatment. The technologies will support a capability-driven architecture for extending human presence beyond low Earth orbit to potential destinations such as the Moon, near Earth asteroids and Mars.

Barta, Daniel J.

2012-01-01

267

Advanced Thomson scattering system for high-flux linear plasma generator  

SciTech Connect

An advanced Thomson scattering system has been built for a linear plasma generator for plasma surface interaction studies. The Thomson scattering system is based on a Nd:YAG laser operating at the second harmonic and a detection branch featuring a high etendue (f /3) transmission grating spectrometer equipped with an intensified charged coupled device camera. The system is able to measure electron density (n{sub e}) and temperature (T{sub e}) profiles close to the output of the plasma source and, at a distance of 1.25 m, just in front of a target. The detection system enables to measure 50 spatial channels of about 2 mm each, along a laser chord of 95 mm. By summing a total of 30 laser pulses (0.6 J, 10 Hz), an observational error of 3% in n{sub e} and 6% in T{sub e} (at n{sub e}= 9.4 Multiplication-Sign 10{sup 18} m{sup -3}) can be obtained. Single pulse Thomson scattering measurements can be performed with the same accuracy for n{sub e} > 2.8 Multiplication-Sign 10{sup 20} m{sup -3}. The minimum measurable density and temperature are n{sub e} < 1 Multiplication-Sign 10{sup 17} m{sup -3} and T{sub e} < 0.07 eV, respectively. In addition, using the Rayleigh peak, superimposed on the Thomson scattered spectrum, the neutral density (n{sub 0}) of the plasma can be measured with an accuracy of 25% (at n{sub 0}= 1 Multiplication-Sign 10{sup 20} m{sup -3}). In this report, the performance of the Thomson scattering system will be shown along with unprecedented accurate Thomson-Rayleigh scattering measurements on a low-temperature argon plasma expansion into a low-pressure background.

Meiden, H. J. van der; Lof, A. R.; Berg, M. A. van den; Brons, S.; Eck, H. J. N. van; Koelman, P. M. J.; Koppers, W. R.; Kruijt, O. G.; Oyevaar, T.; Prins, P. R.; Rapp, J.; Scholten, J.; Smeets, P. H. M.; Star, G. van der; Zeijlmans van Emmichoven, P. A. [FOM Institute DIFFER, Dutch Institute for Fundamental Energy Research, Association EURATOM-FOM, Trilateral Euregio Cluster, P.O. Box 1207, 3430 BE Nieuwegein (Netherlands); Donne, A. J. H.; Schram, D. C. [FOM Institute DIFFER, Dutch Institute for Fundamental Energy Research, Association EURATOM-FOM, Trilateral Euregio Cluster, P.O. Box 1207, 3430 BE Nieuwegein (Netherlands); Eindhoven University of Technology, Eindhoven (Netherlands); Naumenko, N. N. [IPh NASB, Minsk (Belarus); Tugarinov, S. N. [SRC TRINITI, Troitsk, Moscow Reg. (Russian Federation)

2012-12-15

268

Advanced Thomson scattering system for high-flux linear plasma generator.  

PubMed

An advanced Thomson scattering system has been built for a linear plasma generator for plasma surface interaction studies. The Thomson scattering system is based on a Nd:YAG laser operating at the second harmonic and a detection branch featuring a high etendue (f/3) transmission grating spectrometer equipped with an intensified charged coupled device camera. The system is able to measure electron density (n(e)) and temperature (T(e)) profiles close to the output of the plasma source and, at a distance of 1.25 m, just in front of a target. The detection system enables to measure 50 spatial channels of about 2 mm each, along a laser chord of 95 mm. By summing a total of 30 laser pulses (0.6 J, 10 Hz), an observational error of 3% in n(e) and 6% in T(e) (at n(e) = 9.4 × 10(18) m(-3)) can be obtained. Single pulse Thomson scattering measurements can be performed with the same accuracy for n(e) > 2.8 × 10(20) m(-3). The minimum measurable density and temperature are n(e) < 1 × 10(17) m(-3) and T(e) < 0.07 eV, respectively. In addition, using the Rayleigh peak, superimposed on the Thomson scattered spectrum, the neutral density (n(0)) of the plasma can be measured with an accuracy of 25% (at n(0) = 1 × 10(20) m(-3)). In this report, the performance of the Thomson scattering system will be shown along with unprecedented accurate Thomson-Rayleigh scattering measurements on a low-temperature argon plasma expansion into a low-pressure background. PMID:23277985

van der Meiden, H J; Lof, A R; van den Berg, M A; Brons, S; Donné, A J H; van Eck, H J N; Koelman, P M J; Koppers, W R; Kruijt, O G; Naumenko, N N; Oyevaar, T; Prins, P R; Rapp, J; Scholten, J; Schram, D C; Smeets, P H M; van der Star, G; Tugarinov, S N; Zeijlmans van Emmichoven, P A

2012-12-01

269

Next-Generation Evaporative Cooling Systems for the Advanced Extravehicular Mobility Unit Portable Life Support System  

NASA Technical Reports Server (NTRS)

The development of the Advanced Extravehicular Mobility Unit (AEMU) Portable Life Support System (PLSS) is currently underway at NASA Johnson Space Center. The AEMU PLSS features two new evaporative cooling systems, the Reduced Volume Prototype Spacesuit Water Membrane Evaporator (RVP SWME), and the Auxiliary Cooling Loop (ACL). The RVP SWME is the third generation of hollow fiber SWME hardware, and like its predecessors, RVP SWME provides nominal crewmember and electronics cooling by flowing water through porous hollow fibers. Water vapor escapes through the hollow fiber pores, thereby cooling the liquid water that remains inside of the fibers. This cooled water is then recirculated to remove heat from the crewmember and PLSS electronics. Major design improvements, including a 36% reduction in volume, reduced weight, and more flight like back-pressure valve, facilitate the packaging of RVP SWME in the AEMU PLSS envelope. In addition to the RVP SWME, the Auxiliary Cooling Loop (ACL), was developed for contingency crewmember cooling. The ACL is a completely redundant, independent cooling system that consists of a small evaporative cooler--the Mini Membrane Evaporator (Mini-ME), independent pump, independent feed-water assembly and independent Liquid Cooling Garment (LCG). The Mini-ME utilizes the same hollow fiber technology featured in the RVP SWME, but is only 25% of the size of RVP SWME, providing only the necessary crewmember cooling in a contingency situation. The ACL provides a number of benefits when compared with the current EMU PLSS contingency cooling technology; contingency crewmember cooling can be provided for a longer period of time, more contingency situations can be accounted for, no reliance on a Secondary Oxygen Vessel (SOV) for contingency cooling--thereby allowing a SOV reduction in size and pressure, and the ACL can be recharged-allowing the AEMU PLSS to be reused, even after a contingency event. The development of these evaporative cooling systems will contribute to a more robust and comprehensive AEMU PLSS.

Makinen, Janice V.; Anchondo, Ian; Bue, Grant C.; Campbell, Colin; Colunga, Aaron

2012-01-01

270

Advanced, Cost-Based Indices for Forecasting the Generation of Photovoltaic Power  

NASA Astrophysics Data System (ADS)

Distribution systems are undergoing significant changes as they evolve toward the grids of the future, which are known as smart grids (SGs). The perspective of SGs is to facilitate large-scale penetration of distributed generation using renewable energy sources (RESs), encourage the efficient use of energy, reduce systems' losses, and improve the quality of power. Photovoltaic (PV) systems have become one of the most promising RESs due to the expected cost reduction and the increased efficiency of PV panels and interfacing converters. The ability to forecast power-production information accurately and reliably is of primary importance for the appropriate management of an SG and for making decisions relative to the energy market. Several forecasting methods have been proposed, and many indices have been used to quantify the accuracy of the forecasts of PV power production. Unfortunately, the indices that have been used have deficiencies and usually do not directly account for the economic consequences of forecasting errors in the framework of liberalized electricity markets. In this paper, advanced, more accurate indices are proposed that account directly for the economic consequences of forecasting errors. The proposed indices also were compared to the most frequently used indices in order to demonstrate their different, improved capability. The comparisons were based on the results obtained using a forecasting method based on an artificial neural network. This method was chosen because it was deemed to be one of the most promising methods available due to its capability for forecasting PV power. Numerical applications also are presented that considered an actual PV plant to provide evidence of the forecasting performances of all of the indices that were considered.

Bracale, Antonio; Carpinelli, Guido; Di Fazio, Annarita; Khormali, Shahab

2014-01-01

271

Interactive Video.  

ERIC Educational Resources Information Center

A workshop on interactive video was designed for fourth and fifth grade students, with the goals of familiarizing students with laser disc technology, developing a cadre of trained students to train other students and staff, and challenging able learners to utilize higher level thinking skills while conducting a research project. (JDD)

Boyce, Carol

1992-01-01

272

User Manual Extended Video  

E-print Network

User Manual TDS3VID Extended Video Application Module 071-0328-02 *P071032802* 071032802 #12. . . . . . . . . . . . . . . . . . . . . . . . . . . Accessing Extended Video Functions 7. . . . . . . . . . . . Extended Video Conventions 10. . . . . . . . . . . . . . . . . . . Changes to the Video Trigger Menu 11. . . . . . . . . . . . . . Changes to the Display Menu 15

Kleinfeld, David

273

Video based system monitoring  

E-print Network

In this work we develop new algorithms for video comparison, for video alignment, and for determining the similarity between entire video clips or detecting similarities between sub-videos. The intent of this work is to ...

Anthony, Brian W., 1972-

2006-01-01

274

Digital Video, Digital TV IMPA -Instituto de Matemtica Pura e  

E-print Network

1 Digital Video, Digital TV and Beyond Luiz Velho IMPA - Instituto de Matemática Pura e Aplicada 2 Outline Video in the Digital Age Deployment of Digital Video Enabling Technologies Research @ VISGRAF Laboratory Trends and the Future... 3 Evolution of Digital Video 1st Generation - Analog / Digital Conversion

275

Statistical metrology - measurement and modeling of variation for advanced process development and design rule generation  

Microsoft Academic Search

Advanced process technology will require more detailed understanding and tighter control of variation in devices and interconnects. The purpose of statistical metrology is to provide methods to measure and characterize variation, to model systematic and random components of that variation, and to understand the impact of variation on both yield and performance of advanced circuits. Of particular concern are spatial

D. S. Boning; J. E. Chung

1998-01-01

276

Foreign Affairs: Video  

NSDL National Science Digital Library

Foreign Affairs is a distinguished publication, founded in 1922 and published by the non-profit Council on Foreign Relations (CFR). Sponsoring dozens of events each year for folks with an interest in policy matters, this section of their website brings together video from these happenings, along with interviews and other audio features. The casual visitor may appreciate looking over the Most Viewed area, with offerings such as The Promise of the Arab Spring, The Coming Arctic Boom, and The Egyptian State Unravels. One popular podcast here is The World Next Week, which features conversations about those issues that will be of great import in the coming week. Visitors can look over the videos by date, regions, or topics, or perform an advanced search combining key words and filtering. Additionally, visitors can learn about the latest updates from the CFR and also take a gander at their job board.

277

Digital video segmentation  

Microsoft Academic Search

The data driven, bottom up approach to video segmentation has ignored the inherent structure that exists in video. This work uses the model driven approach to digital video segmentation. Mathematical models of video based on video production techniques are formulated. These models are used to classify the edit effects used in video and film production. The classes and models are

Arun Hampapur; Terry E. Weymouth; Ramesh Jain

1994-01-01

278

Video Summarization with SOMs  

Microsoft Academic Search

Video summarization is a process where a long video file is converted to a considerably shorter form. The video summary can then be used to facilitate efficient searching and browsing of video files in large video collec- tions. The aim of successful automatic summarization is to preserve as much as possible from the essential content of each video. What is

Jorma Laaksonen; Ville Viitaniemi; Hannes Muurinen

2007-01-01

279

This Rock 'n' Roll Video Teaches Math  

ERIC Educational Resources Information Center

Mathematics is a discipline that has significantly advanced through the use of digital technologies with improved computational, graphical, and symbolic capabilities. Digital videos can be used to present challenging mathematical questions for students. Video clips offer instructional possibilities for moving students from a passive mode of…

Niess, Margaret L.; Walker, Janet M.

2009-01-01

280

Video Analysis with a Web Camera  

ERIC Educational Resources Information Center

Recent advances in technology have made video capture and analysis in the introductory physics lab even more affordable and accessible. The purchase of a relatively inexpensive web camera is all you need if you already have a newer computer and Vernier's Logger Pro 3 software. In addition to Logger Pro 3, other video analysis tools such as…

Wyrembeck, Edward P.

2009-01-01

281

Fulldome Video: An Emerging Technology for Education  

ERIC Educational Resources Information Center

This article talks about fulldome video, a new technology which has been adopted fairly extensively by the larger, well-funded planetariums. Fulldome video, also called immersive projection, can help teach subjects ranging from geology to history to chemistry. The rapidly advancing progress of projection technology has provided high-resolution…

Law, Linda E.

2006-01-01

282

Instructional Science and Engineering Videos  

NSDL National Science Digital Library

These fun, intelligent, and engaging videos were created by scientist Jonathan Hare to be used in schools, workshops, and in home-study with accompanying information. On the site, visitors can make their way through 25 short films that explore the worlds of infrared photography, light beams, parabolic light collectors, generators, and seawater batteries. The videos are about five minutes long, and they feature hands-on demonstrations, witty commentary, and scientific asides that are informative and accessible. Visitors can also sign up to receive updates when new videos are released or watch them via YouTube.

Hare, Jonathan

283

A generic flexible and robust approach for intelligent real-time video-surveillance systems  

NASA Astrophysics Data System (ADS)

In this article we present a generic, flexible and robust approach for an intelligent real-time video-surveillance system. A previous version of the system was presented in [1]. The goal of these advanced tools is to provide help to operators by detecting events of interest in visual scenes and highlighting alarms and compute statistics. The proposed system is a multi-camera platform able to handle different standards of video inputs (composite, IP, IEEE1394 ) and which can basically compress (MPEG4), store and display them. This platform also integrates advanced video analysis tools, such as motion detection, segmentation, tracking and interpretation. The design of the architecture is optimised to playback, display, and process video flows in an efficient way for video-surveillance application. The implementation is distributed on a scalable computer cluster based on Linux and IP network. It relies on POSIX threads for multitasking scheduling. Data flows are transmitted between the different modules using multicast technology and under control of a TCP-based command network (e.g. for bandwidth occupation control). We report here some results and we show the potential use of such a flexible system in third generation video surveillance system. We illustrate the interest of the system in a real case study, which is the indoor surveillance.

Desurmont, Xavier; Delaigle, Jean-Francois; Bastide, Arnaud; Macq, Benoit

2004-05-01

284

Investigation of advanced counterrotation blade configuration concepts for high speed turboprop systems. Task 3: Advanced fan section grid generator final report and computer program user's manual  

NASA Technical Reports Server (NTRS)

A procedure is studied for generating three-dimensional grids for advanced turbofan engine fan section geometries. The procedure constructs a discrete mesh about engine sections containing the fan stage, an arbitrary number of axisymmetric radial flow splitters, a booster stage, and a bifurcated core/bypass flow duct with guide vanes. The mesh is an h-type grid system, the points being distributed with a transfinite interpolation scheme with axial and radial spacing being user specified. Elliptic smoothing of the grid in the meridional plane is a post-process option. The grid generation scheme is consistent with aerodynamic analyses utilizing the average-passage equation system developed by Dr. John Adamczyk of NASA Lewis. This flow solution scheme requires a series of blade specific grids each having a common axisymmetric mesh, but varying in the circumferential direction according to the geometry of the specific blade row.

Crook, Andrew J.; Delaney, Robert A.

1991-01-01

285

Advanced sensors and instrumentation  

NASA Technical Reports Server (NTRS)

NASA is currently investigating the readiness of Advanced Sensors and Instrumentation to meet the requirements of new initiatives in space. The following technical objectives and technologies are briefly discussed: smart and nonintrusive sensors; onboard signal and data processing; high capacity and rate adaptive data acquisition systems; onboard computing; high capacity and rate onboard storage; efficient onboard data distribution; high capacity telemetry; ground and flight test support instrumentation; power distribution; and workstations, video/lighting. The requirements for high fidelity data (accuracy, frequency, quantity, spatial resolution) in hostile environments will continue to push the technology developers and users to extend the performance of their products and to develop new generations.

Calloway, Raymond S.; Zimmerman, Joe E.; Douglas, Kevin R.; Morrison, Rusty

1990-01-01

286

Next-Generation Entrepreneurs Ready to Advance Breast Cancer Research Innovations | Poster  

Cancer.gov

The trailblazing international competition focuses on bringing emerging breast cancer technologies to market through the creation of start-up businesses. The challenge was launched by The Center for Advancing Innovation (CAI), the Avon Foundation for Women, and NCI.

287

Implementation of an advanced digital feedwater control system at the Prairie Island nuclear generating station  

Microsoft Academic Search

EPRI Project RP2126-4 was a cooperative effort between TVA, EPRI, and Westinghouse which resulted in the demonstration of a prototype of a full range, fully automatic feedwater control system, using fault tolerant digital technology, at the TVA Sequoyah simulator site. That prototype system also included advanced signal validation algorithms and an advanced man-machine interface that used CRT-based soft-control technology. The

R. E. Paris; K. A. Gaydos; J. O. Hill; S. G. Whitson; R. Wirkkala

1990-01-01

288

Calendar and cycle-life studies of advanced technology development program generation 1 lithium-ion batteries  

Microsoft Academic Search

This paper presents the test results and life modeling of special calendar- and cycle-life tests conducted on 18650-size generation 1 (Gen 1) lithium-ion battery cells (nominal capacity of 0.9Ah; 3.0–4.1V rating) developed to establish a baseline chemistry and performance for the Department of Energy sponsored advanced technology development (ATD) program. Electrical performance testing was conducted at the Argonne National Laboratory

R. B Wright; C. G Motloch; J. R Belt; J. P Christophersen; C. D Ho; R. A Richardson; I Bloom; S. A Jones; V. S Battaglia; G. L Henriksen; T Unkelhaeuser; D Ingersoll; H. L Case; S. A Rogers; R. A Sutula

2002-01-01

289

Video concept classification using video similarity scores  

US Patent & Trademark Office Database

A method for determining a semantic concept classification for a digital video clip, comprising: receiving an audio-visual dictionary including a plurality of audio-visual grouplets, the audio-visual grouplets including visual background and foreground codewords, audio background and foreground codewords, wherein the codewords in a particular audio-visual grouplet were determined to be correlated with each other; determining reference video codeword similarity scores for a set of reference video clips; determining codeword similarity scores for the digital video clip; determining a reference video similarity score for each reference video clip representing a similarity between the digital video clip and the reference video clip responsive to the audio-visual grouplets, the codeword similarity scores and the reference video codeword similarity scores; and determining one or more semantic concept classifications using trained semantic classifiers responsive to the determined reference video similarity scores.

2014-04-15

290

Overcoming Challenges: "Going Mobile with Your Own Video Models"  

ERIC Educational Resources Information Center

Video modeling has been shown to be an effective intervention for students with a variety of disabilities. Traditional video models present problems in terms of application across meaningful settings, such as in the community or even across the school environment. However, with advances in mobile technology, portable devices with video capability…

Carnahan, Christina R.; Basham, James D.; Christman, Jennifer; Hollingshead, Aleksandra

2012-01-01

291

Practical and Scalable Transmission of Segmented Video Sequences to Multiple Players Using H.264  

NASA Astrophysics Data System (ADS)

We present a practical way to distribute viewports on the same video sequence to large amounts of players. Each of them has personal preferences to be met or is limited by the physical properties of his/her device (e.g., screen size of a PDA or processing power of a mobile phone). Instead of taking the naïve approach, in which sections of the video sequence are decoded and re-encoded for each of the clients, we have exploited advanced features offered by the H.264 codec to enable selection of parts of the video sequence by directly manipulating the encoder-generated bitstream. At the same time, we have overcome several practical issues presented by the fact that support for these features is sadly lacking from the state-of-the-art encoders available on the market. Two alternative solutions are discussed and have been implemented, enabling the generation of measurement results and comparison to alternative approaches.

Quax, Peter; di Fiore, Fabian; Issaris, Panagiotis; Lamotte, Wim; van Reeth, Frank

292

Advanced control for power density maximization of the brushless DC generator  

E-print Network

............................................................ 47 III Comparison of the electrical output power of the BLDC generator.............. 58 IV Specification of the TMS320F243 DSP ........................................................ 62 V Specification of the BLDC generator...) have made the PM machine popular in many applications. It is compact, lightweight and low maintenance. In addition, development of fast semiconductor switches and cost-effective DSP processors have revolutionized the motor/generator drives. These new...

Lee, Hyung-Woo

2005-02-17

293

Three-Dimensional Delaunay Mesh Generation Using a Modified Advancing Front Approach  

Microsoft Academic Search

. We introduce a meshing method which uses an advancing front Delaunay algorithm.The presented Delaunay technique avoids the need for a temporary tetrahedralization of the convexhull and a later following segmentation step which is typical for commonly used methods.The algorithm is suitable for local regridding applications. This is an important issue for elementquality improvements and for moving grid situations occurring

Peter Fleischmann; Siegfried Selberherr

1997-01-01

294

Development of an advanced human–machine interface for next generation nuclear power plants  

Microsoft Academic Search

An advanced human–machine interface (HMI) has been developed to enhance the safety and availability of a nuclear power plant (NPP) by improving operational reliability. The key elements of the proposed HMI are the large display panels which present synopsis of plant status and the compact, computer-based work stations for monitoring, control and protection functions. The work station consists of four

Soon Heung Chang; Seong Soo Choi; Jin Kyun Park; Gyunyoung Heo; Han Gon Kim

1999-01-01

295

Generation Vexed: Age-Related Culture Clashes in the Advancement Office and How to Avoid Them  

ERIC Educational Resources Information Center

Welcome to the Generational Wars--a workplace skirmish over everything from ties and pantyhose to flex time and Facebook. For the first time in American history, three generations are now working desk-to-desk. And each brings wildly varying views on work and life into the office. The battle lines have been drawn. On one side are the Baby Boomers,…

DiConsiglio, John

2009-01-01

296

Synergies Between Generation-IV and Advanced Fusion Power Plant Research Programs  

Microsoft Academic Search

For the first time since the early 1990's, the U.S. Department of Energy has long term research and development programs in both nuclear fission and nuclear fusion, the Generation IV program and the ARIES program, respectively. The Generation IV program has introduced a safety goal for future fission reactor systems that has long been reflected in the ARIES mission: no

Paul P. H. Wilson; Todd R. Allen; Laila A. El-Guebaly

2005-01-01

297

Domain decomposition by the advancing-partition method for parallel unstructured grid generation  

NASA Technical Reports Server (NTRS)

In a method for domain decomposition for generating unstructured grids, a surface mesh is generated for a spatial domain. A location of a partition plane dividing the domain into two sections is determined. Triangular faces on the surface mesh that intersect the partition plane are identified. A partition grid of tetrahedral cells, dividing the domain into two sub-domains, is generated using a marching process in which a front comprises only faces of new cells which intersect the partition plane. The partition grid is generated until no active faces remain on the front. Triangular faces on each side of the partition plane are collected into two separate subsets. Each subset of triangular faces is renumbered locally and a local/global mapping is created for each sub-domain. A volume grid is generated for each sub-domain. The partition grid and volume grids are then merged using the local-global mapping.

Pirzadeh, Shahyar Z. (Inventor); Banihashemi, legal representative, Soheila (Inventor)

2012-01-01

298

SIRSALE: integrated video database management tools  

NASA Astrophysics Data System (ADS)

Video databases became an active field of research during the last decade. The main objective in such systems is to provide users with capabilities to friendly search, access and playback distributed stored video data in the same way as they do for traditional distributed databases. Hence, such systems need to deal with hard issues : (a) video documents generate huge volumes of data and are time sensitive (streams must be delivered at a specific bitrate), (b) contents of video data are very hard to be automatically extracted and need to be humanly annotated. To cope with these issues, many approaches have been proposed in the literature including data models, query languages, video indexing etc. In this paper, we present SIRSALE : a set of video databases management tools that allow users to manipulate video documents and streams stored in large distributed repositories. All the proposed tools are based on generic models that can be customized for specific applications using ad-hoc adaptation modules. More precisely, SIRSALE allows users to : (a) browse video documents by structures (sequences, scenes, shots) and (b) query the video database content by using a graphical tool, adapted to the nature of the target video documents. This paper also presents an annotating interface which allows archivists to describe the content of video documents. All these tools are coupled to a video player integrating remote VCR functionalities and are based on active network technology. So, we present how dedicated active services allow an optimized video transport for video streams (with Tamanoir active nodes). We then describe experiments of using SIRSALE on an archive of news video and soccer matches. The system has been demonstrated to professionals with a positive feedback. Finally, we discuss open issues and present some perspectives.

Brunie, Lionel; Favory, Loic; Gelas, J. P.; Lefevre, Laurent; Mostefaoui, Ahmed; Nait-Abdesselam, F.

2002-07-01

299

VLSI Neural Networks Help To Compress Video Signals  

NASA Technical Reports Server (NTRS)

Advanced analog/digital electronic system for compression of video signals incorporates artificial neural networks. Performs motion-estimation and image-data-compression processing. Effectively eliminates temporal and spatial redundancies of sequences of video images; processes video image data, retaining only nonredundant parts to be transmitted, then transmits resulting data stream in form of efficient code. Reduces bandwidth and storage requirements for transmission and recording of video signal.

Fang, Wai-Chi; Sheu, Bing J.

1996-01-01

300

Advanced Corrosion-Resistant Zr Alloys for High Burnup and Generation IV Applications  

SciTech Connect

The objective of this collaboration between four institutions in the US and Korea is to demonstrate a technical basis for the improvement of the corrosion resistance of zirconium-based alloys in more extreme operating environments (such as those present in severe fuel duty,cycles (high burnup, boiling, aggressive chemistry) andto investigate the feasibility (from the point of view of corrosion rate) of using advanced zirconium-based alloys in a supercritical water environment.

Arthur Motta; Yong Hwan Jeong; R.J. Comstock; G.S. Was; Y.S. Kim

2006-10-31

301

Multiscale Modeling of the Deformation of Advanced Ferritic Steels for Generation IV Nuclear Energy  

SciTech Connect

The objective of this project is to use the multi-scale modeling of materials (MMM) approach to develop an improved understanding of the effects of neutron irradiation on the mechanical properties of high-temperature structural materials that are being developed or proposed for Gen IV applications. In particular, the research focuses on advanced ferritic/ martensitic steels to enable operation up to 650-700°C, compared to the current 550°C limit on high-temperature steels.

Nasr M. Ghoniem; Nick Kioussis

2009-04-18

302

Next generation grinding spindle for cost-effective manufacture of advanced ceramic components  

SciTech Connect

Finish grinding of advanced structural ceramics has generally been considered an extremely slow and costly process. Recently, however, results from the High-Speed, Low-Damage (HSLD) program have clearly demonstrated that numerous finish-process performance benefits can be realized by grinding silicon nitride at high wheel speeds. A new, single-step, roughing-process capable of producing high-quality silicon nitride parts at high material removal rates while dramatically reducing finishing costs has been developed.

Kovach, J.A.; Laurich, M.A.

2000-01-01

303

Overview of the Stereo and Multiview Video Coding Extensions of the H.264\\/MPEG4 AVC Standard  

Microsoft Academic Search

In this paper, techniques to represent multiple views of a video scene are described, and compression methods for making use of correlations between different views ABSTRACT | Significant improvements in video compression capability have been demonstrated with the introduction of the H.264\\/MPEG-4 advanced video coding (AVC) standard. Since developing this standard, the Joint Video Team of the ITU-T Video Coding

Anthony Vetro; Thomas Wiegand; Gary J. Sullivan

2011-01-01

304

Harvesting and summarizing user-generated content for advanced speech-based human-computer interaction  

E-print Network

There have been many assistant applications on mobile devices, which could help people obtain rich Web content such as user-generated data (e.g., reviews, posts, blogs, and tweets). However, online communities and social ...

Liu, Jingjing, Ph. D. Massachusetts Institute of Technology

2012-01-01

305

DESIGN, FABRICATION, AND TESTING OF AN ADVANCED, NON-POLLUTING TURBINE DRIVE GAS GENERATOR  

SciTech Connect

The objective of this report period was to continue the development of the Gas Generator design, completion of the hardware and ancillary hardware fabrication and commence the Test Preparations for the testing of the non-polluting unique power turbine driven Gas Generator. Focus during this report period has been on completing the Gas Generator fabrication of hardware and ancillary hardware, and completion of unit closeout brazing and bonding. Because of unacceptable delays encountered in a previously competitively selected test site, CES initiated a re-competition of our testing program and selected an alternate test site. Following that selection, CES used all available resources to make preparations for testing the 10 Mw Gas Generator at the new testing site facilities of NTS at Saugus, CA.

E.W. (Gene) Baxter

2002-06-30

306

Development of TMI Logistic Fuel Solid Oxide Fuel Cell (SOFC) for Advanced Military Power Generation Systems.  

National Technical Information Service (NTIS)

Power generation systems based on the Technology Management, Inc. (TMI) solid oxide fuel cell (SOFC) are an optional modality for military applications requiring small scale, lightweight, compact sources of electrical power for extended missions. An examp...

C. Milliken, M. A. Petrik, R. C. Ruhl

2000-01-01

307

Advances and challenges in the development of power-generation systems at small scales  

Microsoft Academic Search

The miniaturization of electro-mechanical devices, and the resulting need for micro-power generation (milliwatts to watts) with low weight, long life devices, has lead to the recent development of the field of micro-scale combustion and power generation. The primary objective of this new field is to leverage the high energy density of fuels, specifically liquid hydrocarbon fuels relative to batteries and

David C. Walther; Jeongmin Ahn

2011-01-01

308

Diabetes Travel Tips Video  

MedlinePLUS Videos and Cool Tools

... Resources > Diabetes Travel Tips Video Diabetes Travel Tips Video Diabetes doesn’t keep David from traveling. But ... Subtitle Diabetes Travel Tips Transcript Diabetes Travel Tips Video (MP4) Keywords: self-management , behavior change , National Diabetes ...

309

Marketing through Video Presentations.  

ERIC Educational Resources Information Center

Discusses the advantages of using video presentations as marketing tools. Includes information about video news releases, public service announcements, and sales/marketing presentations. Describes the three stages in creating a marketing video: preproduction planning; production; and postproduction. (JOW)

Newhart, Donna

1989-01-01

310

Monolithic solid oxide fuel cell technology advancement for coal-based power generation. Annual report, October 1991--September 1992  

SciTech Connect

The program is being conducted by a team consisting of AlliedSignal Aerospace Systems & Equipment (ASE) (formerly AiResearch Los Angeles Division) and Argonne National Laboratory (ANL). The objective of the program is to advance materials and fabrication methodologies to develop a monolithic solid oxide fuel cell (MSOFC) system capable of meeting performance, life, and cost goals for coal-based power generation. The program focuses on materials research and development, fabrication process development, cell/stack performance testing and characterization, cost and system analysis, and quality development.

Not Available

1993-05-01

311

FABRICATE AND TEST AN ADVANCED NON-POLLUTING TURBINE DRIVE GAS GENERATOR  

SciTech Connect

In September 2000 the Department of Energy's National Energy Technology Laboratory (DOE/NETL) contracted with Clean Energy Systems, Inc. (CES) of Sacramento, California to design, fabricate, and test a 20 MW{sub t} (10 MW{sub e}) gas generator. Program goals were to demonstrate a non-polluting gas generator at temperatures up to 3000 F at 1500 psi, and to demonstrate resulting drive gas composition, comprising steam and carbon dioxide substantially free of pollutants. Following hardware design and fabrication, testing, originally planned to begin in the summer of 2001, was delayed by unavailability of the contracted test facility. CES designed, fabricated, and tested the proposed gas generator as originally agreed. The CES process for producing near-zero-emissions power from fossil fuels is based on the near-stoichiometric combustion of a clean gaseous fuel with oxygen in the presence of recycled water, to produce a high-temperature, high-pressure turbine drive fluid comprising steam and carbon dioxide. Tests demonstrated igniter operation over the prescribed ranges of pressure and mixture ratios. Ignition was repeatable and reliable through more than 100 ignitions. Injector design ''A'' was operated successfully at both low power ({approx}20% of rated power) and at rated power ({approx}20 MW{sub t}) in more than 95 tests. The uncooled gas generator configuration (no diluent injectors or cooldown chambers installed) produced drive gases at temperatures approaching 3000 F and at pressures greater than 1550 psia. The fully cooled gas generator configuration, with cooldown chambers and injector ''A'', operated consistently at pressures from 1100 to 1540 psia and produced high pressure, steam-rich turbine drive gases at temperatures ranging from {approx}3000 to as low as 600 F. This report includes description of the intended next steps in the gas generator technology demonstration and traces the anticipated pathway to commercialization for the gas generator technology developed in this program.

Eugene Baxter; Roger E. Anderson; Stephen E. Doyle

2003-06-01

312

Microbial electricity generation in rice paddy fields: recent advances and perspectives in rhizosphere microbial fuel cells.  

PubMed

Microbial fuel cells (MFCs) are devices that use living microbes for the conversion of organic matter into electricity. MFC systems can be applied to the generation of electricity at water/sediment interfaces in the environment, such as bay areas, wetlands, and rice paddy fields. Using these systems, electricity generation in paddy fields as high as ?80 mW m(-2) (based on the projected anode area) has been demonstrated, and evidence suggests that rhizosphere microbes preferentially utilize organic exudates from rice roots for generating electricity. Phylogenetic and metagenomic analyses have been conducted to identify the microbial species and catabolic pathways that are involved in the conversion of root exudates into electricity, suggesting the importance of syntrophic interactions. In parallel, pot cultures of rice and other aquatic plants have been used for rhizosphere MFC experiments under controlled laboratory conditions. The findings from these studies have demonstrated the potential of electricity generation for mitigating methane emission from the rhizosphere. Notably, however, the presence of large amounts of organics in the rhizosphere drastically reduces the effect of electricity generation on methane production. Further studies are necessary to evaluate the potential of these systems for mitigating methane emission from rice paddy fields. We suggest that paddy-field MFCs represent a promising approach for harvesting latent energy of the natural world. PMID:25394406

Kouzuma, Atsushi; Kaku, Nobuo; Watanabe, Kazuya

2014-12-01

313

A prototype to automate the video subsystem routing for the video distribution subsystem of Space Station Freedom  

NASA Technical Reports Server (NTRS)

The Video Distribution Subsystem (VDS) for Space Station Freedom provides onboard video communications. The VDS includes three major functions: external video switching; internal video switching; and sync and control generation. The Video Subsystem Routing (VSR) is a part of the VDS Manager Computer Software Configuration Item (VSM/CSCI). The VSM/CSCI is the software which controls and monitors the VDS equipment. VSR activates, terminates, and modifies video services in response to Tier-1 commands to connect video sources to video destinations. VSR selects connection paths based on availability of resources and updates the video routing lookup tables. This project involves investigating the current methodology to automate the Video Subsystem Routing and developing and testing a prototype as 'proof of concept' for designers.

Betz, Jessie M. Bethly

1993-01-01

314

An advanced CCD emulator with 32MB image memory  

NASA Astrophysics Data System (ADS)

As part of the LSST sensor development program we have developed an advanced CCD emulator for testing new multichannel readout electronics. The emulator, based on an Altera Stratix II FPGA for timing and control, produces 4 channels of simulated video waveforms in response to an appropriate sequence of horizontal and vertical clocks. It features 40MHz, 16-bit DACs for reset and video generation, 32MB of image memory for storage of arbitrary grayscale bitmaps, and provision to simulate reset and clock feedthrough ("glitches") on the video channels. Clock inputs are qualified for proper sequences and levels before video output is generated. Binning, region of interest, and reverse clock sequences are correctly recognized and appropriate video output will be produced. Clock transitions are timestamped and can be played back to a control PC. A simplified user interface is provided via a daughter card having an ARM M3 Cortex microprocessor and miniature color LCD display and joystick. The user can select video modes from stored bitmap images, or flat, gradient, bar, chirp, or checkerboard test patterns; set clock thresholds and video output levels; and set row/column formats for image outputs. Multiple emulators can be operated in parallel to simulate complex CCDs or CCD arrays.

O'Connor, P.; Fried, J.; Kotov, I.

2012-07-01

315

Intelligent keyframe extraction for video printing  

NASA Astrophysics Data System (ADS)

Nowadays most digital cameras have the functionality of taking short video clips, with the length of video ranging from several seconds to a couple of minutes. The purpose of this research is to develop an algorithm which extracts an optimal set of keyframes from each short video clip so that the user could obtain proper video frames to print out. In current video printing systems, keyframes are normally obtained by evenly sampling the video clip over time. Such an approach, however, may not reflect highlights or regions of interest in the video. Keyframes derived in this way may also be improper for video printing in terms of either content or image quality. In this paper, we present an intelligent keyframe extraction approach to derive an improved keyframe set by performing semantic analysis of the video content. For a video clip, a number of video and audio features are analyzed to first generate a candidate keyframe set. These features include accumulative color histogram and color layout differences, camera motion estimation, moving object tracking, face detection and audio event detection. Then, the candidate keyframes are clustered and evaluated to obtain a final keyframe set. The objective is to automatically generate a limited number of keyframes to show different views of the scene; to show different people and their actions in the scene; and to tell the story in the video shot. Moreover, frame extraction for video printing, which is a rather subjective problem, is considered in this work for the first time, and a semi-automatic approach is proposed.

Zhang, Tong

2004-10-01

316

Television camera video level control system  

NASA Technical Reports Server (NTRS)

A video level control system is provided which generates a normalized video signal for a camera processing circuit. The video level control system includes a lens iris which provides a controlled light signal to a camera tube. The camera tube converts the light signal provided by the lens iris into electrical signals. A feedback circuit in response to the electrical signals generated by the camera tube, provides feedback signals to the lens iris and the camera tube. This assures that a normalized video signal is provided in a first illumination range. An automatic gain control loop, which is also responsive to the electrical signals generated by the camera tube 4, operates in tandem with the feedback circuit. This assures that the normalized video signal is maintained in a second illumination range.

Kravitz, M.; Freedman, L. A.; Fredd, E. H.; Denef, D. E. (inventors)

1985-01-01

317

A next-generation in-situ nanoprobe beamline for the Advanced Photon Source  

NASA Astrophysics Data System (ADS)

The Advanced Photon Source is currently developing a suite of new hard x-ray beamlines, aimed primarily at the study of materials and devices under real conditions. One of the flagship beamlines of the APS Upgrade is the In-Situ Nanoprobe beamline (ISN beamline), which will provide in-situ and operando characterization of advanced energy materials and devices under change of temperature and gases, under applied fields, in 3D. The ISN beamline is designed to deliver spatially coherent x-rays with photon energies between 4 keV and 30 keV to the ISN instrument. As an x-ray source, a revolver-type undulator with two interchangeable magnetic structures, optimized to provide high brilliance throughout the range of photon energies of 4 keV - 30 keV, will be used. The ISN instrument will provide a smallest hard x-ray spot of 20 nm using diffractive optics, with sensitivity to sub-10 nm sample structures using coherent diffraction. Using nanofocusing mirrors in Kirkpatrick-Baez geometry, the ISN will also provide a focus of 50 nm with a flux of 8·1011 Photons/s at a photon energy of 10 keV, several orders of magnitude larger than what is currently available. This will allow imaging of trace amounts of most elements in the periodic table, with a sensitivity to well below 100 atoms for most metals in thin samples. It will also enable nanospectroscopic studies of the chemical state of most materials relevant to energy science. The ISN beamline will be primarily used to study inorganic and organic photovoltaic systems, advanced batteries and fuel cells, nanoelectronics devices, and materials and systems diesigned to reduce the environmental impact of combustion.

Maser, Jörg; Lai, Barry; Buonassisi, Tonio; Cai, Zhonghou; Chen, Si; Finney, Lydia; Gleber, Sophie-Charlotte; Harder, Ross; Jacobsen, Chris; Liu, Wenjun; Murray, Conal; Preissner, Curt; Roehrig, Chris; Rose, Volker; Shu, Deming; Vine, David; Vogt, Stefan

2013-09-01

318

Recent advances on pipe inspection using guided waves generated by electromagnetic acoustic transducers  

NASA Astrophysics Data System (ADS)

For several years guided waves have been used for pipe wall defect detection. Guided waves have become popular for monitoring large structures because of the capability of these waves to propagate long distances along pipes, plates, interfaces and structural boundaries before loosing their strengths. The current technological challenges are to detect small defects in the pipe wall and estimate their dimensions using appropriate guided wave modes and to generate those modes relatively easily for field applications. Electro-Magnetic Acoustic Transducers (EMAT) can generate guided waves in pipes in the field environment. This paper shows how small defects in the pipe wall can be detected and their dimensions can be estimated by appropriate signal processing technique applied to the signals generated and received by the EMAT.

Vasiljevic, Milos; Kundu, Tribikram; Grill, Wolfgang; Twerdowski, Evgeny

2008-03-01

319

Science Teacher Efficacy and Extrinsic Factors Toward Professional Development Using Video Games in a Design-Based Research Model: The Next Generation of STEM Learning  

NASA Astrophysics Data System (ADS)

Designed-based research principles guided the study of 51 secondary-science teachers in the second year of a 3-year professional development project. The project entailed the creation of student-centered, inquiry-based, science, video games. A professional development model appropriate for infusing innovative technologies into standards-based curricula was employed to determine how science teacher's attitudes and efficacy where impacted while designing science-based video games. The study's mixed-method design ascertained teacher efficacy on five factors (General computer use, Science Learning, Inquiry Teaching and Learning, Synchronous chat/text, and Playing Video Games) related to technology and gaming using a web-based survey). Qualitative data in the form of online blog posts was gathered during the project to assist in the triangulation and assessment of teacher efficacy. Data analyses consisted of an Analysis of Variance and serial coding of teacher reflective responses. Results indicated participants who used computers daily have higher efficacy while using inquiry-based teaching methods and science teaching and learning. Additional emergent findings revealed possible motivating factors for efficacy. This professional development project was focused on inquiry as a pedagogical strategy, standard-based science learning as means to develop content knowledge, and creating video games as technological knowledge. The project was consistent with the Technological Pedagogical Content Knowledge (TPCK) framework where overlapping circles of the three components indicates development of an integrated understanding of the suggested relationships. Findings provide suggestions for development of standards-based science education software, its integration into the curriculum and, strategies for implementing technology into teaching practices.

Annetta, Leonard A.; Frazier, Wendy M.; Folta, Elizabeth; Holmes, Shawn; Lamb, Richard; Cheng, Meng-Tzu

2013-02-01

320

Education Tools: Nanotechnology Video Modules  

NSDL National Science Digital Library

The Penn State Center for Nanotechnology Education and Utilization (CNEU) is the home of the Pennsylvania Nanofabrication Manufacturing Technology (NMT) Partnership and the National Science Foundation (NSF) Regional Center for Nanofabrication Manufacturing Education, an NSF-sponsored regional Advanced Technology Education (ATE) Center. CNEU is dedicated to research, development, and education across all aspects of micro- and nanotechnology and the resources of the Center are focused on the incorporation of nanotechnology into secondary education, post-secondary education, and industry applications. Here, CNEU provides a series of Nanotechnology Video Modules which are used as an introduction to nanotechnology courses at CNEU partner institutions. There are currently six videos available covering introductions, nanotech basics, nanotech industry influence, nanotech educational opportunities, and career choices in nanotech. For anyone interested in basic nanotech courses or in encouraging students to consider nanotech as a career option these videos might prove useful.

2008-09-25

321

Advanced Wind Turbine Program Next Generation Turbine Development Project: June 17, 1997--April 30, 2005  

SciTech Connect

This document reports the technical results of the Next Generation Turbine Development Project conducted by GE Wind Energy LLC. This project is jointly funded by GE and the U.S. Department of Energy's National Renewable Energy Laboratory.The goal of this project is for DOE to assist the U.S. wind industry in exploring new concepts and applications of cutting-edge technology in pursuit of the specific objective of developing a wind turbine that can generate electricity at a levelized cost of energy of $0.025/kWh at sites with an average wind speed of 15 mph (at 10 m height).

GE Wind Energy, LLC

2006-05-01

322

Integrating Video Games and Robotic Play in Physical Environments Byron Lahey,1  

E-print Network

synergies for the advancement of video games and novel human-robot interactions (HRI) through playIntegrating Video Games and Robotic Play in Physical Environments Byron Lahey,1 Winslow Burleson,1 paradigm for video-robot game development and play. Video games are becoming more and more physically

Burleson, Winslow S.

323

Video Visualization Gareth Daniel Min Chen  

E-print Network

, generated by the entertainment industry, security and traffic cameras, video conferencing systems, video, such as the United Kingdom, it is estimated that on av- erage a citizen is caught on security and traffic cameras 300 in the security industry is the ratio of surveillance cameras to security personnel. Imagine that security

Grant, P. W.

324

Improving Access to a Digital Video Library  

Microsoft Academic Search

Quick access to short, relevant video segments enables efficient use of a digital video library. This study evaluated an interface designed for such access, an interface that allows the user to browse a set of segments generated by a search query. Subjects' performance and attitudes were measured while they performed a fact-finding task to determine the relative effectiveness of three

Michael G. Christel; David B. Winkler; C. Roy Taylor

1997-01-01

325

Unbalanced Quantized Multiple State Video Coding  

Microsoft Academic Search

Multiple state video coding (MSVC) is a multiple description scheme based on frame-wise splitting of the video sequence into two or more subsequences. Each subsequence is encoded separately to generate descriptions which can be decoded independently. Due to subsequence splitting, the prediction gain decreases. But since reconstruction capabilities improve, error resilience of the system increases. Our focus is on multiple

Sila Ekmekci Flierl; Thomas Sikora; Pascal Frossard

2006-01-01

326

Promoting Academic Programs Using Online Videos  

ERIC Educational Resources Information Center

In the last 20 years, the Internet has evolved from simply conveying text and then still photographs and music to the present-day medium in which individuals are contributors and consumers of a nearly infinite number of professional and do-it-yourself videos. In this dynamic environment, new generations of Internet users are streaming video and…

Clark, Thomas; Stewart, Julie

2007-01-01

327

Data Generation in the Discovery Sciences--Learning from the Practices in an Advanced Research Laboratory  

ERIC Educational Resources Information Center

General scientific literacy includes understanding the grounds on which scientific claims are based. The measurements scientists make and the data that they produce from them generally constitute these grounds. However, the nature of data generation has received relatively little attention from those interested in teaching science through inquiry.…

Roth, Wolff-Michael

2013-01-01

328

Advanced SAR system simulations in synthetically generated real-world scenarios  

Microsoft Academic Search

Synthetically generated radar imagery can provide a unique virtual environment which integrates the variability of sensor, scene, operational, and processing parameters. Since the advent of radar sensor technology, a significant level of effort has been expended on the development of electromagnetic modeling techniques to understand and predict the scattering and sensor phenomenology involved in synthetic-aperture radar (SAR) imaging systems. The

Isabelle B. Lozon; Steven M. Kilberg; Juan Roman

1996-01-01

329

Advanced concepts for high power RF generation using solid state materials  

NASA Astrophysics Data System (ADS)

Traditionally, high power radio frequency and microwave energy have been generated using electron beam driven hard-vacuum tubes such as klystrons and magnetrons. High-power solid-state sources of RF have not been available. It is well known that a non-linear, dispersive system can convert a pulse into an array of solitons. Although this effect has been exploited in the optical field, using non-linear optical materials, little work has been done in the field of high voltage electronics. It is the goal of this work, which is just beginning, to develop sources of RF in the few hundreds of megahertz to gigahertz range with power levels in the hundreds of megawatts to the gigawatt level. To generate solitons a high voltage pulse is fed onto a transmission line that is periodically loaded with a non-linear ceramic dielectric in the paraelectric phase. The combination of the non-linearity and dispersion causes the pulse to break up into an array of solitons. A soliton-based system has several components: the solid state, high voltage, high current switch to provide the initial high voltage pulse; a shock line to decrease the rise time of the initial pulse to less than a few nanoseconds; and the soliton generating transmission line where the high power RF is generated when driven by the fast rising pulse from the shock line. The approach and progress to date will be described.

Fazio, Michael V.; Erickson, G. Andrew

1999-05-01

330

An advanced methodology for generating multigroup cross sections for shielding calculations  

NASA Astrophysics Data System (ADS)

Deterministic methods (e.g., the discrete ordinates (SN) method) are commonly used in solving shielding problems. The SN method solves the linear Boltzmann equation by discretizing spatial, angular and energy dependencies. One of the major uncertainties in SN transport calculations is caused by the energy discretization. Energy discretization requires the use of multigroup cross sections. Therefore, to obtain better accuracy in results, it is of best interest to use effective multigroup cross sections. Currently there are several publicly available multigroup cross section libraries that were generated for particular applications, for example, for shielding or core calculations. However, there is no publicly available, problem-dependent methodology for construction of effective multigroup libraries. In order to enhance the accuracy in shielding calculations, we developed a new, iterative methodology, referred to as the CPXSD (C&barbelow;ontributon and P&barbelow;oint-Wise C&barbelow;ross-S&barbelow;ection ?riven), that constructs group structures for an objective of interest. Additionally, to improve the computational efficiency in generating multigroup libraries, we developed a parallel version of the cross-section processing code NJOY. Besides increasing the accuracy and efficiency of multigroup libraries, we analyzed the 47-neutron, 20-gamma group BUGLE libraries that were generated at the Oak Ridge National Laboratory (ORNL) with the standard multigroup procedure, successfully benchmarked our BUGLE-like libraries against the ORNL BUGLE libraries, and performed modifications to the standard BUGLE libraries. Further work was pursued in comparing multigroup libraries with continuous energy libraries. In this thesis, we demonstrated that the parallel version of NJOY that we developed introduces speedups of ˜5 in generating a BUGLE-like library consisting of 27 nuclides. We showed that using an effective fine-group structure in generating broad group libraries, and the bi-linear adjoint weighting technique are two important factors that increase the accuracy of broad-group libraries. Furthermore, we illustrated the value of the CPXSD methodology by generating fine- and broad-group libraries for shielding problems. We demonstrated that CPXSD yields effective libraries which include significantly fewer groups, while resulting in more accurate results. For example, for fast neutron dosimetry, the CPXSD generated broad-group libraries have almost half the number of groups of the BUGLE groups above 0.1 MeV, and resulted in improved accuracy (e.g. ˜4%).

Alpan, Fatos Arzu

331

Making Sense of Video Games: Pre-Service Teachers Struggle with This New Medium  

Microsoft Academic Search

This next generation of students has had exposure to digital media far more than any previous generation, particularly video games. Almost daily, news outlets report the latest news on the evils of video games, how much children are playing video games, the potential of video games, and the list just goes on. In this presentation, the researchers explore how pre-service

Mark Austin Evans; Sacip Toker

332

Measurements of nonlinear harmonic generation at the Advanced Photon Source's SASE FEL  

SciTech Connect

SASE saturation was recently achieved at the Advanced Photon Source's SASE FEL in the low-energy undulator test line (LEUTL) at 530 nm and 385 nm. The electron beam microbunching becomes more and more prominent until saturation is achieved. This bunching causes nonlinear harmonic emission that extends the usefulness of a SASE system in achieving shorter FEL wavelengths for the same electron beam energy. They have investigated the intensity of the fundamental and second-harmonic undulator radiation as a function of distance along the undulator line and present the experimental results and compare them to numerical simulations. In addition, they have measured the single-shot second harmonic spectra as well as the simultaneous fundamental and second harmonic spectra and present the experimental results.

Biedron, S.G.; Dejus, E.J.; Huang, Z.; Milton, S.V.; Sajaev, V.; Berg, W.; Borland, M.; Den Hartog, P.K.; Erdmann, M.; Fawley, W.M.; Gluskin, E.; Kim, K.-J.; Lewellen, J.W.; Li, Y.; Moog, E.R.; Nassiri, A.; Wiermerslage, G.; Yang, B.X.

2002-03-01

333

Research into advanced concepts of microwave power amplification and generation utilizing linear beam devices  

NASA Technical Reports Server (NTRS)

A theoretical study of some aspects of the interaction between a drifting stream of electrons with transverse cyclotron motions and an electromagnetic field is presented. Particular emphasis was given to the possible generation and amplification of millimeter waves. The major effort was devoted to a theoretical study of the cyclotron resonance oscillator. The appendices include published papers on the cyclotron resonance oscillator which resulted from this investigation.

Mcisaac, P. R.

1972-01-01

334

Recent advances in the chemistry and biology of new generation taxoids.  

PubMed

Among the numerous chemotherapeutic drugs, paclitaxel and docetaxel are among the most widely used against various types of cancer. However, these drugs cause undesirable side effects as well as drug resistance. Therefore, it is essential to develop "taxane" anticancer agents with better pharmacological properties and improved activity especially against drug-resistant cancers. Several laboratories have performed extensive SAR studies on paclitaxel. Our SAR studies have led to the development of numerous highly potent novel second- and third-generation taxoids with systematic modifications at the C-2, C-10, and C-3' positions. The third-generation taxoids showed virtually no difference in potency against drug-resistant and drug-sensitive cell lines. Some of the new generation taxoids also exhibited excellent cytotoxicity against pancreatic cell lines expressing multidrug-resistant genes. We have also designed taxoids with strategic fluorine incorporation to investigate their effects on the cytotoxicity and the blockage of known metabolic pathways. Furthermore, we have successfully employed computational biology analysis to design novel macrocyclic taxoids to mimic the bioactive conformation of paclitaxel. This account describes our work on the design, synthesis, and biological evaluation of these novel taxoids, which has led to the discovery of very promising candidates for further preclinical studies. PMID:19239240

Ojima, Iwao; Das, Manisha

2009-03-27

335

Recent Advances in the Chemistry and Biology of New Generation Taxoids‡  

PubMed Central

Among the numerous chemotherapeutic drugs, paclitaxel and docetaxel are among the most widely used against various types of cancer. However, these drugs cause undesirable side effects as well as drug resistance. Therefore, it is essential to develop “taxane” anticancer agents with better pharmacological properties and improved activity especially against drug-resistant cancers. Several laboratories have performed extensive SAR studies on paclitaxel. Our SAR studies have led to the development of numerous highly potent novel second- and third-generation taxoids with systematic modifications at the C-2, C-10 and C-3? positions. The third-generation taxoids showed virtually no difference in potency against drug-resistant and drug-sensitive cell lines. Some of the new generation taxoids also exhibited excellent cytotoxicity against pancreatic cell lines expressing multidrug-resistant genes. We have also designed taxoids with strategic fluorine incorporation to investigate their effects on the cytotoxicity and the blockage of known metabolic pathways. Furthermore, we have successfully employed computational biology analysis to design novel macrocyclic taxoids to mimic the bioactive conformation of paclitaxel. This account describes our work on the design, synthesis and biological evaluation of these novel taxoids, which has led to the discovery of very promising candidates for further preclinical studies. PMID:19239240

Ojima, Iwao; Das, Manisha

2009-01-01

336

Video conferencing made easy  

NASA Technical Reports Server (NTRS)

Network video conferencing is advancing rapidly throughout the nation, and the Idaho National Engineering Laboratory (INEL), a Department of Energy (DOE) facility, is at the forefront of the development. Engineers at INEL/EG&G designed and installed a very unique DOE videoconferencing system, offering many outstanding features, that include true multipoint conferencing, user-friendly design and operation with no full-time operators required, and the potential for cost effective expansion of the system. One area where INEL/EG&G engineers made a significant contribution to video conferencing was in the development of effective, user-friendly, end station driven scheduling software. A PC at each user site is used to schedule conferences via a windows package. This software interface provides information to the users concerning conference availability, scheduling, initiation, and termination. The menus are 'mouse' controlled. Once a conference is scheduled, a workstation at the hubs monitors the network to initiate all scheduled conferences. No active operator participation is required once a user schedules a conference through the local PC; the workstation automatically initiates and terminates the conference as scheduled. As each conference is scheduled, hard copy notification is also printed at each participating site. Video conferencing is the wave of the future. The use of these user-friendly systems will save millions in lost productivity and travel cost throughout the nation. The ease of operation and conference scheduling will play a key role on the extent industry uses this new technology. The INEL/EG&G has developed a prototype scheduling system for both commercial and federal government use.

Larsen, D. Gail; Schwieder, Paul R.

1993-01-01

337

Video game violence  

Microsoft Academic Search

The popularity of video games, especially violent video games, has reached phenomenal proportions. The theoretical line of reasoning that hypothesizes a causal relationship between violent video-game play and aggression draws on the very large literature on media violence effects. Additionally, there are theoretical reasons to believe that video game effects should be stronger than movie or television violence effects. This

Karen E. Dill; Jody C. Dill

1998-01-01

338

Virage Video Engine  

Microsoft Academic Search

The temporal and multi-modal nature of video increases the dimensionality of content based retrieval problem. This places new demands on the indexing and retrieval tools required. The Virage Video Engine (VVE) with the default set of primitives provide the necessary frame work and basic tools for video content based retrieval. The video engine is a flexible platform independent architecture which

Arun Hampapur; Amarnath Gupta; Bradley Horowitz; Chiao-Fe Shu; Charles Fuller; Jeffrey R. Bach; Monika Gorkani; Ramesh Jain

1997-01-01

339

School-grown Videos.  

ERIC Educational Resources Information Center

Discusses the integration and use of video technology in five schools where student involvement in all planning and production processes is stressed. Projects include daily news programs, orientation videos for parents, video versions of school newsletters, entertainment news programs, video yearbooks, monthly local business programs, and cultural…

Jordahl, Gregory

1995-01-01

340

The Video Book.  

ERIC Educational Resources Information Center

This book provides a comprehensive step-by-step learning guide to video production. It begins with camera equipment, both still and video. It then describes how to reassemble the video and build a final product out of "video blocks," and discusses multiple-source configurations, which are required for professional level productions of live shows.…

Clendenin, Bruce

341

On-sun test results from second-generation and advanced-concepts alkali-metal pool-boiler receivers  

SciTech Connect

Two 75-kW{sub t} alkali-metal pool-boiler solar receivers have been successfully tested at Sandia National Laboratories` National Solar Thermal Test Facility. The first one, Sandia`s `` second-generation pool-boiler receiver,`` was designed to address commercialization issues identified during post-test assessment of Sandia`s first-generation pool-boiler receiver. It was constructed from Haynes alloy 230 and contained the alkali-metal alloy NaK-78. The absorber`s wetted side had a brazed-on powder-metal coating to stabilize boiling. This receiver was evaluated for boiling stability, hot- and warm-restart behavior, and thermal efficiency. Boiling was stable under all conditions. All of the hot restarts were successful. Mild transient hot spots observed during some hot restarts were eliminated by the addition of 1/3 torr of xenon to the vapor space. All of the warm restarts were also successful. The heat-transfer crisis that damaged the first receiver did not recur. Thermal efficiency was 92.3% at 750{degrees}C with 69.6 kW{sub t} solar input. The second receiver tested, Sandia`s ``advanced-concepts receiver,`` was a replica of the first-generation receiver except that the cavities, which were electric-discharge-machined in the absorber for boiling stability, were eliminated. This step was motivated by bench-scale test results that showed that boiling stability improved with increased heated-surface area, tilt of the heated surface from vertical, and added xenon. The bench-scale results suggested that stable boiling might be possible without heated-surface modification in a 75-kW{sub t} receiver. Boiling in the advanced-concepts receiver with 1/3 torr of xenon added has been stable under all conditions, confirming the bench-scale tests.

Moreno, J.B.; Andraka, C.E.; Moss, T.A.; Cordeiro, P.G.; Dudley, V.E.; Rawlinson, K.S.

1994-05-01

342

On the importance of source classification in Wyner-Ziv video coding  

NASA Astrophysics Data System (ADS)

Source classification has been widely studied in conventional coding of image and video signals. This paper explores the idea of exploiting so-called classification gain in Wyner-Ziv (WZ) video coding. We first provide theoretical analysis of how source classification can lead to improved Rate-Distortion tradeoff in WZ coding and quantify the classification gain by the ratio of weighted arithmetic mean to weighted geometric mean over subsources. Then we present a practical WZ video coding algorithm based on the source classification principle. The statistics of both spatial and temporal correlation are taken into account in our classification strategy. Specifically, the subsource with the steepest R-D slope is identified to be the class of significant wavelet coefficients of the blocks that are poorly motion-compensated in WZ frames. In such classification-based approach, rate control is performed at the decoder which can be viewed as the dual to conventional video coding where R-D optimization stays with the encoder. By combining powerful LDPC codes (for generating coded information) with advanced temporal interpolation (for generating side information), we have observed that the new Wyner-Ziv coder achieves highly encouraging performance for the test sequences used in our experiments. For example, the gap between H264 JM11.0 (I-B-I-B...) and the proposed WZ video coder is dramatically reduced for foreman and hall QCIF sequences when compared with the best reported results in the literature.

Li, Xin

2008-01-01

343

Analytical investigation of thermal barrier coatings for advanced power generation combustion turbines  

NASA Technical Reports Server (NTRS)

An analytical evaluation was conducted to determine quantitatively the improvement potential in cycle efficiency and cost of electricity made possible by the introduction of thermal barrier coatings to power generation combustion turbine systems. The thermal barrier system, a metallic bond coat and yttria stabilized zirconia outer layer applied by plasma spray techniques, acts as a heat insulator to provide substantial metal temperature reductions below that of the exposed thermal barrier surface. The study results show the thermal barrier to be a potentially attractive means for improving performance and reducing cost of electricity for the simple, recuperated, and combined cycles evaluated.

Amos, D. J.

1977-01-01

344

Advanced techniques for noise source identification on a large generator unit  

SciTech Connect

Power station acoustic noise assessment, which has experienced increased environmental awareness and subsequently more stringent legislation for a number of years, has received and added stimulus due to the recent advent of powerful measurement and analysis techniques including sound intensity and coherence. These experimental techniques are explained and results, for a generator unit, illustrate their value in providing a unique, correlated insight into noise problems. This includes noise quantification, full explanation of site sound pressure level in terms of the various influences and major noise source identification. These techniques are widely applicable and an invaluable aid to any industrial noise problem.

Williams, R.G.D. (GEC Alsthom Turbine Generator Ltd., Stafford (United Kingdom)); Yang, S.J. (Heriot-Watt Univ., Edinburgh (United Kingdom))

1993-03-01

345

Advanced high-explosive flux compression generator development: The CN-3 series  

NASA Astrophysics Data System (ADS)

A very successful series of three flux compression generator (FCG) experiments and one hydro-only test, designed to quantify the performance capabilities and limitations of high-current, high-field, high-power coaxial FCG's, is reported. In the last test, the CN-3 FCG produced a peak current of greater than 150 MA with a final doubling time of less than 10 micro-s into a 2-nH inductive load. Experimental results are in excellent agreement with extensive preshot and postshot one-dimensional (1D) and two-dimensional (2D) magnetohydrodynamic (MHD) calculations.

Freeman, B. L.; Sheppard, M. G.; Fowler, C. M.

1992-08-01

346

Situational simulations in interactive video  

SciTech Connect

The Westinghouse Hanford Company Advanced Training Technologies section is using situational simulations in several Interactive Video training courses. Two applications of situational simulations will be discussed. In the first, used in the Hanford General Employee Training course, the student evaluates employee's actions in simulations of possible workplace situations. In the second, used in the Criticality Safety course, students must follow well-defined procedures to complete tasks. Design and incorporation of situational simulations will be discussed. 3 refs.

Smith, L.J.

1991-07-01

347

Application of high temperature air heaters to advanced power generation cycles  

SciTech Connect

Recent developments in ceramic composite materials open up the possibility of recuperative air heaters heating air to temperatures well above the feasible with metal tubes. A high temperature air heater (HTAH) has long been recognized as a requirement for the most efficient MHD plants in order to reach high combustor flame temperatures. The application of gas turbines in coal-fired plants of all types has been impeded because of the problems in cleaning exhaust gas sufficiently to avoid damage to the turbine. With a possibility of a HTAH, such plants may become feasible on the basis of air turbine cycles, in which air is compressed and heated in the HTAH before being applied to turbine. The heat exchanger eliminates the need for the hot gas cleanup system. The performance improvement potential of advanced cycles with HTAH application including the air turbine cycle in several variations such as the DOE program on ``Coal-Fired Air Furnace Combined Cycle...,`` variations originated by the authors, and the MHD combined cycle are presented. The status of development of ceramic air heater technology is included.

Thompson, T R [Tennessee Valley Authority, Chattanooga, TN (United States)] [Tennessee Valley Authority, Chattanooga, TN (United States); Boss, W H; Chapman, J N [Tennessee Univ., Tullahoma, TN (United States). Space Inst.] [Tennessee Univ., Tullahoma, TN (United States). Space Inst.

1992-03-01

348

Advanced wavefront correction technology for the next generation of adaptive optics equipped ophthalmic instrumentation  

NASA Astrophysics Data System (ADS)

Adaptive optics (AO) is becoming increasingly important in improving system resolution in flood illuminated fundus cameras, confocal laser scanning ophthalmoscopes (cSLO) and optical coherence tomography (OCT). For the latter two cases, AO also provides an increase in the throughput light levels. The flood and cSLO modalities have allowed for the routine, in-vivo visualization of individual cone photoreceptor cells and real time blood flow measurements of single leukocyte cells. Most recently, evidence of the rod mosaic has also been observed. A key component in all of these systems is the deformable mirror (DM) that provides the correction of the high order aberrations. The majority of these systems to-date have utilized large, expensive DMs originally designed for astronomy. This paper details ongoing work at Iris AO, Inc in which advanced fabrication techniques based on microelectromechanical systems (MEMS) are being leveraged. This approach yields extremely compact DMs that offer higher performance and lower cost, coupled with the ability for batch fabrication. The Iris AO design uses an array of individually addressable hexagonal segments than can each be moved in three orthogonal directions. Such a design allows for superior ocular wavefront fitting performance and very high stroke (>10 microns). Additionally, our DMs can be fabricated with diameters that are an order of magnitude smaller than conventional non-MEMS techniques.

Doble, Nathan; Helmbrecht, Michael; Hart, Matthew; Juneau, Thor

2005-04-01

349

Ranking Domain-specific Highlights by Analyzing Edited Videos  

E-print Network

devices like Google Glass. On YouTube alone, 100 hours #12;2 Min Sun, Ali Farhadi, Steve Seitz of video a high quality edited video. Indeed, both Google and Facebook recently released products that seek to achieve similar goals. Google's Auto-Awesome movie feature generates a video summary from all the footage

Anderson, Richard

350

Low-Cost Optical Video Links Based on VCSELs  

NASA Astrophysics Data System (ADS)

The history of introduction and current status of VCSEL based optical video link modules which have emerged as one of the main applications of VCSELs are described. The structure and characteristics of VCSELs in optical video links are summarized. The technical issues of the next generation optical video links for the mass market are discussed.

Shin, Hyun-Kuk

351

Multiresolution scene-based video watermarking using perceptual models  

Microsoft Academic Search

We present a watermarking procedure to embed copyright protection into digital video. Our watermarking procedure is scene-based and video dependent. It directly exploits spatial masking, frequency masking, and temporal properties to embed an invisible and robust watermark. The watermark consists of static and dynamic temporal components that are generated from a temporal wavelet transform of the video scenes. The resulting

Mitchell D. Swanson; Bin Zhu; Ahmed H. Tewfik

1998-01-01

352

Challenges in Video Analytics  

NASA Astrophysics Data System (ADS)

Video analytics technology has matured and found application in a variety of fields over the past decade. This chapter discusses the current state-ofthe-art, and describes challenges for future video analytics implementations. Current applications and markets for video analytics are described in the context of a processing pipeline. Application-specific challenges are described with potential solutions to those challenges. This chapter also lists some implementation considerations for embedded video analytics and concludes with future and emerging applications of video analytics.

Gagvani, Nikhil

353

VideoSense: A Contextual In-Video Advertising System  

Microsoft Academic Search

With Internet delivery of video content surging to an unprecedented level, video has become one of the primary sources for online advertising. In this paper, we present VideoSense as a novel contextual in-video advertising system, which automatically associates the relevant video ads and seamlessly inserts the ads at the appropriate positions within each individual video. Unlike most video sites which

Tao Mei; Xian-Sheng Hua; Shipeng Li

2009-01-01

354

Introducing the Next-Generation Advanced Baseline Imager on Goes-R  

NASA Astrophysics Data System (ADS)

The Advanced Baseline Imager (ABI), designated to be one of the instruments on a future Geo-stationary Operational Environmental Satellite (GOES) series, will introduce a new era for U.S. geostationary environmental remote sensing. ABI is slated to be launched on GOES-R in 2012 and will be used for a wide range of weather, oceanographic, climate, and environmental applications. ABI will have more spectral bands (16), faster imaging (enabling more geographical areas to be scanned), and higher spatial resolution (2 km in the infrared and 1 0.5 km in the visible) than the current GOES Imager. The purposes of the selected spectral bands are summarized in this paper. There will also be improved performance with regard to radiometrics and image navigation/registration. ABI will improve all current GOES Imager products and introduce a host of new products. New capabilities will include detecting upper-level SO2 plumes, monitoring plant health on a diurnal time scale, inferring cloud-top phase and particle size and other microphysical properties, and quantifying air quality with improved aerosol and smoke detection. ABI will be operating in concert with the GOES-R high spectral resolution sounder, part of the Hyperspec-tral Environmental Suite (HES); several products will be improved through the combination of high spatial resolution imager data with collocated high spectral resolution measurements. This paper introduces the proposed ABI spectral bands, discusses the rationale for their selection, and presents simulated ABI examples gleaned from current airborne and satellite instrument data.


Schmit, Timothy J.; Gunshor, Mathew M.; Menzel, W. Paul; Gurka, James J.; Li, Jun; Bachmeier, A. Scott

2005-08-01

355

Harmonic Generation and Soft-X-Ray Laser with LASERIX: Source Development, Applications and Advanced Diagnosis  

NASA Astrophysics Data System (ADS)

The LASERIX facility has restarted operation in the middle of the year 2010. Since then, important work has been achieved on the XUV sources performance, reliability and stability, which lead to the construction of two beamlines. The first one is based on transient collisional soft X-ray laser. In the second one, the high order harmonic generation process is used to convert infrared laser into coherent XUV radiations. Characteristics and some recent works on both of them will be presented. Besides, a complete setup for pump-probe experiments has been developed and successfully tested. Some examples involving this device and dealing with plasma opacity, radiobiology and nanomagnetism will be presented. We will conclude this paper by a discussion on how application experiments can be turned into valuable diagnostics for XUV sources.

Guilbaud, Olivier; Kazamias, Sophie; Cassou, Kevin; Pittman, Moana; Daboussi, Sameh; Delmas, Olivier; Demailly, Julien; Neveu, Olivier; Pouhe, Chris; Vodungbo, Boris; Zeitoun, Philippe; Wilson, Lucy; Tallents, Greg; Dusseix, Antonin; Richet, Gabriel; Gense, Aurelie; Nghiem, Bich-Lien; Cros, Brigitte; Maynard, Gilles; Ros, David

356

Negatif olmayan matris ayr??tirma ile ikili video kiyimlama binary video hashing by non-negative matrix factorization  

Microsoft Academic Search

This paper presents the video fingerprinting method proposed to TRECVID Content Based Copy Detection task by ITU MSPR Group. The proposed system consists of two modules: video fingerprint extraction and search-retrieval. Fingerprint extraction module performs a binary hashing scheme to generate the video fingerprints by using the mixing and encoding matrices obtained by non-negative matrix factorization (NMF) which is commonly

Ozan Gürsoy; Sezer Kutluk; Bilge Günsel; N. S?engo?r

2010-01-01

357

Modeling of the Main Component of the Bottoming Stage in an Advanced Co-Generation System on the Operational Planning  

NASA Astrophysics Data System (ADS)

The advanced co-generation system (ACGS) was built at Waseda University in 1999. The ACGS consists of a gas turbine, a steam turbine, an ammonia-water mixture turbine, an ammonia absorption refrigerator and an ice storage system. These turbine systems have a cascade relation upon the utilization of energy. Meanwhile, the ammonia-water mixture turbine and the ammonia absorption refrigerator located in the bottoming stage of the ACGS to utilize the lower temperature steam. In this paper, a mathematical model of the bottoming stage of the ACGS is established according to the experimental data. And, the operational planning of the bottoming stage with three cases of the cooling demand during the nighttime is also discussed.

Tomizawa, Masao; Takeshita, Keisuke; Tsuri, Keisuke; Amano, Yoshiharu; Akiba, Masashi; Hashizume, Takumi

358

Accelerated rogue waves generated by soliton fusion at the advanced stage of supercontinuum formation in photonic crystal fibers  

E-print Network

Soliton fusion is a fascinating and delicate phenomenon that manifests itself in optical fibers in case of interaction between co-propagating solitons with small temporal and wavelengths separation. We show that the mechanism of acceleration of trailing soliton by dispersive waves radiated from the preceding one provides necessary conditions for soliton fusion at the advanced stage of supercontinuum generation in photonic crystal fibers. As a result of fusion large intensity robust light structures arise and propagate over significant distances. In presence of small random noise the delicate condition for the effective fusion between solitons can easily be broken, making the fusion induced giant waves a rare statistical event. Thus oblong-shaped giant accelerated waves become excellent candidates for optical rogue waves.

Driben, Rodislav

2012-01-01

359

Monolithic solid oxide fuel cell technology advancement for coal-based power generation. Final report, September 1989--March 1994  

SciTech Connect

This project has successfully advanced the technology for MSOFCs for coal-based power generation. Major advances include: tape-calendering processing technology, leading to 3X improved performance at 1000 C; stack materials formulations and designs with sufficiently close thermal expansion match for no stack damage after repeated thermal cycling in air; electrically conducting bonding with excellent structural robustness; and sealants that form good mechanical seals for forming manifold structures. A stack testing facility was built for high-spower MSOFC stacks. Comprehensive models were developed for fuel cell performance and for analyzing structural stresses in multicell stacks and electrical resistance of various stack configurations. Mechanical and chemical compatibility properties of fuel cell components were measured; they show that the baseline Ca-, Co-doped interconnect expands and weakens in hydrogen fuel. This and the failure to develop adequate sealants were the reason for performance shortfalls in large stacks. Small (1-in. footprint) two-cell stacks were fabricated which achieved good performance (average area-specific-resistance 1.0 ohm-cm{sup 2} per cell); however, larger stacks had stress-induced structural defects causing poor performance.

Not Available

1994-05-01

360

Data Hiding for Video-in-Video  

Microsoft Academic Search

We introduce a scheme for hiding high bit-rate supplementary data, such as secondary video, into a digital video stream by directly modifying the pixels in the video frames. The technique requires no separate channel or bit interleaving to transmit the extra information. The data is invisibly embedded using a perception-based projection and quantization algorithm. The data hiding algorithm supports user-defined

Mitchell D. Swanson; Bin Zhu; Ahmed H. Tewfik

1997-01-01

361

Parametric Analysis of a Hover Test Vehicle using Advanced Test Generation and Data Analysis  

NASA Technical Reports Server (NTRS)

Large complex aerospace systems are generally validated in regions local to anticipated operating points rather than through characterization of the entire feasible operational envelope of the system. This is due to the large parameter space, and complex, highly coupled nonlinear nature of the different systems that contribute to the performance of the aerospace system. We have addressed the factors deterring such an analysis by applying a combination of technologies to the area of flight envelop assessment. We utilize n-factor (2,3) combinatorial parameter variations to limit the number of cases, but still explore important interactions in the parameter space in a systematic fashion. The data generated is automatically analyzed through a combination of unsupervised learning using a Bayesian multivariate clustering technique (AutoBayes) and supervised learning of critical parameter ranges using the machine-learning tool TAR3, a treatment learner. Covariance analysis with scatter plots and likelihood contours are used to visualize correlations between simulation parameters and simulation results, a task that requires tool support, especially for large and complex models. We present results of simulation experiments for a cold-gas-powered hover test vehicle.

Gundy-Burlet, Karen; Schumann, Johann; Menzies, Tim; Barrett, Tony

2009-01-01

362

Application of advanced grid generation techniques for flow field computations about complex configurations  

NASA Technical Reports Server (NTRS)

In the computation of flowfields about complex configurations, it is very difficult to construct a boundary-fitted coordinate system. An alternative approach is to use several grids at once, each of which is generated independently. This procedure is called the multiple grids or zonal grids approach; its applications are investigated. The method conservative providing conservation of fluxes at grid interfaces. The Euler equations are solved numerically on such grids for various configurations. The numerical scheme used is the finite-volume technique with a three-stage Runge-Kutta time integration. The code is vectorized and programmed to run on the CDC VPS-32 computer. Steady state solutions of the Euler equations are presented and discussed. The solutions include: low speed flow over a sphere, high speed flow over a slender body, supersonic flow through a duct, and supersonic internal/external flow interaction for an aircraft configuration at various angles of attack. The results demonstrate that the multiple grids approach along with the conservative interfacing is capable of computing the flows about the complex configurations where the use of a single grid system is not possible.

Kathong, Monchai; Tiwari, Surendra N.

1988-01-01

363

Video Browsing on Handheld Devices  

NASA Astrophysics Data System (ADS)

Recent improvements in processing power, storage space, and video codec development enable users now to playback video on their handheld devices in a reasonable quality. However, given the form factor restrictions of such a mobile device, screen size still remains a natural limit and - as the term "handheld" implies - always will be a critical resource. This is not only true for video but any data that is processed on such devices. For this reason, developers have come up with new and innovative ways to deal with large documents in such limited scenarios. For example, if you look at the iPhone, innovative techniques such as flicking have been introduced to skim large lists of text (e.g. hundreds of entries in your music collection). Automatically adapting the zoom level to, for example, the width of table cells when double tapping on the screen enables reasonable browsing of web pages that have originally been designed for large, desktop PC sized screens. A multi touch interface allows you to easily zoom in and out of large text documents and images using two fingers. In the next section, we will illustrate that advanced techniques to browse large video files have been developed in the past years, as well. However, if you look at state-of-the-art video players on mobile devices, normally just simple, VCR like controls are supported (at least at the time of this writing) that only allow users to just start, stop, and pause video playback. If supported at all, browsing and navigation functionality is often restricted to simple skipping of chapters via two single buttons for backward and forward navigation and a small and thus not very sensitive timeline slider.

Hürst, Wolfgang

364

DEVELOPMENT OF AN ADVANCED APPROACH FOR NEXT-GENERATION INTEGRATED RESERVOIR CHARACTERIZATION  

SciTech Connect

Accurate, high-resolution, three-dimensional (3D) reservoir characterization can provide substantial benefits for effective oilfield management. By doing so, the predictive reliability of reservoir flow models, which are routinely used as the basis for investment decisions involving hundreds of millions of dollars and designed to recover millions of barrels of oil, can be significantly improved. Even a small improvement in incremental recovery for high-value assets can result in important contributions to bottom-line profitability. Today's standard practice for developing a 3D reservoir description is to use seismic inversion techniques. These techniques make use of geostatistics and other stochastic methods to solve the inverse problem, i.e., to iteratively construct a likely geologic model and then upscale and compare its acoustic response to that actually observed in the field. This method has several inherent flaws, such as: (1) The resulting models are highly non-unique; multiple equiprobable realizations are produced, meaning (2) The results define a distribution of possible outcomes; the best they can do is quantify the uncertainty inherent in the modeling process, and (3) Each realization must be run through a flow simulator and history matched to assess it's appropriateness, and therefore (4) The method is labor intensive and requires significant time to complete a field study; thus it is applied to only a small percentage of oil and gas producing assets. A new approach to achieve this objective was first examined in a Department of Energy (DOE) study performed by Advanced Resources International (ARI) in 2000/2001. The goal of that study was to evaluate whether robust relationships between data at vastly different scales of measurement could be established using virtual intelligence (VI) methods. The proposed workflow required that three specific relationships be established through use of artificial neural networks (ANN's): core-to-log, log-to-crosswell seismic, and crosswell-to-surface seismic. One of the key attributes of the approach, which should result in the creation of high resolution reservoir characterization with greater accuracy and with less uncertainty than today's methods, is the inclusion of borehole seismic (such as crosswell and/or vertical seismic profiling--VSP) in the data collection scheme. Borehole seismic fills a critical gap in the resolution spectrum of reservoir measurements between the well log and surface seismic scales, thus establishing important constraints on characterization outcomes. The results of that initial study showed that it is, in fact, feasible to establish the three critical relationships required, and that use of data at different scales of measurement to create high-resolution reservoir characterization is possible. Based on the results of this feasibility study, in September 2001, the DOE, again through ARI, launched a subsequent two-year government-industry R&D project to further develop and demonstrate the technology. The goals of this project were to: (1) Make improvements to the initial methodology by incorporating additional VI technologies (such as clustering), using core measurements in place of magnetic resonance image (MRI) logs, and streamlining the workflow, among others. (2) Demonstrate the approach in an integrated manner at a single field site, and validate it via reservoir modeling or other statistical methods.

Scott R. Reeves

2005-04-01

365

Parachute Aerodynamics From Video Data  

NASA Technical Reports Server (NTRS)

A new data analysis technique for the identification of static and dynamic aerodynamic stability coefficients from wind tunnel test video data is presented. This new technique was applied to video data obtained during a parachute wind tunnel test program conducted in support of the Mars Exploration Rover Mission. Total angle-of-attack data obtained from video images were used to determine the static pitching moment curve of the parachute. During the original wind tunnel test program the static pitching moment curve had been determined by forcing the parachute to a specific total angle-of -attack and measuring the forces generated. It is shown with the new technique that this parachute, when free to rotate, trims at an angle-of-attack two degrees lower than was measured during the forced-angle tests. An attempt was also made to extract pitch damping information from the video data. Results suggest that the parachute is dynamically unstable at the static trim point and tends to become dynamically stable away from the trim point. These trends are in agreement with limit-cycle-like behavior observed in the video. However, the chaotic motion of the parachute produced results with large uncertainty bands.

Schoenenberger, Mark; Queen, Eric M.; Cruz, Juan R.

2005-01-01

366

Mosaics from MPEG-2 video  

NASA Astrophysics Data System (ADS)

Construction of panoramic mosaics from video is well established in both the research and commercial communities, but current methods generally perform the time-consuming registration procedure entirely from the sequence's pixel data. Video sequences usually exist in compressed format, often MPEG-2; while specialized hardware and highly-optimized software can often quickly create accurate mosaics from a video sequence's pixels, these products do not make efficient use of all information available in a compressed video stream. In particular, MPEG video files generally contain significant information about global camera motion in their motion vectors. This paper describes how to exploit the motion vector information so that global motion can be estimated extremely quickly and accurately, which leads to accurate panoramic mosaics. The major obstacle in generating mosaics with this method is variable quality of MPEG motion vectors, both within a stream from a particular MPEG encoder and between streams compressed with different encoders. The paper discusses methods of robustly estimating global camera motion from the observed motion vectors, including the use of least absolute value estimators, variable model order for global camera motion, and motion vector weighting depending on their estimated accuracy. Experimental results are presented to demonstrate the performance of the algorithm.

Robertson, Mark A.; Heath, Thomas S.

2003-06-01

367

An Advanced Next Generation Archival and Distribution System for Global Atmospheric Science Research and Applications  

NASA Astrophysics Data System (ADS)

NASA's Atmospheric Science Data Center at the NASA Langley Research Center has developed a new state-of- the-art data archival, and distribution system to serve the atmospheric sciences data provider and user communities. The new system, called Archive - Next Generation (ANGe), is replacing two large-scale science data management systems, and is designed with a distributed, multi-tier, serviced-based, message oriented architecture enabling new methods for searching, accessing, and customizing data. The previous two systems required a user to actively manage a session in a web browser to sequentially search for and obtain data. The ANGe system is architected to allow programmatic calls to the archive via web services to obtain multiple data sets of interest to the user. Web service access to the archive enhances the user's ability to utilize multiple data sets managed at different locations via a Grid computing environment. This technology distributes computationally intensive data processing for large data sets, and greatly improves the efficiency of extracting smaller pieces of data of interest to a specific study. Geospatial metadata is managed in a PostGIS-enabled database, allowing for integration with mainstream GIS utilities and applications. The Atmospheric Science Data Center is also producing custom value-added data products and tailoring access to information and data to meet the needs of a diverse user community. Details of these new data access tools and capabilities, and planned enhancements will be discussed. The Atmospheric Science Data Center in Langley's Science Directorate leads NASA's program for the processing, archival and distribution of Earth science data in the areas of radiation budget, clouds, aerosols, and tropospheric chemistry. The Data Center was established in 1991 to support NASA's Earth Observing System and the U.S. Global Change Research Program. It is unique among NASA data centers in the size of its archive, cutting edge computing technology, and full range of data services.

Closs, J. W.; Baskin, W. E.; Piatko, P.; Ritchey, N. A.

2007-12-01

368

Quality Evaluation of Color Plus Depth Map-Based Stereoscopic Video  

Microsoft Academic Search

In the near future, many conventional video applications are likely to be replaced by immersive video to provide a sense of ldquobeing there.rdquo This transition is facilitated by the recent advancement of 3D capture, coding, transmission, and display technologies. Stereoscopic video is the simplest form of 3D video available in the literature. ldquoColor plus depth maprdquo based stereoscopic video has

Chaminda T. E. R. Hewage; Stewart T. Worrall; Safak Dogan; Stephane Villette; Ahmet M. Kondoz

2009-01-01

369

Online scene change detection of multicast (MBone) video  

NASA Astrophysics Data System (ADS)

Many multimedia applications, such as multimedia data management systems and communication systems, require efficient representation of multimedia content. Thus semantic interpretation of video content has been a popular research area. Currently, most content-based video representation involves the segmentation of video based on key frames which are generated using scene change detection techniques as well as camera/object motion. Then, video features can be extracted from key frames. However most of such research performs off-line video processing in which the whole video scope is known as a priori which allows multiple scans of the stored video files during video processing. In comparison, relatively not much research has been done in the area of on-line video processing, which is crucial in video communication applications such as on-line collaboration, news broadcasts and so on. Our research investigates on-line real-time scene change detection of multicast video over the Internet. Our on-line processing system are designed to meet the requirements of real-time video multicasting over the Internet and to utilize the successful video parsing techniques available today. The proposed algorithms extract key frames from video bitstreams sent through the MBone network, and the extracted key frames are multicasted as annotations or metadata over a separate channel to assist in content filtering such as those anticipated to be in use by on-line filtering proxies in the Internet. The performance of the proposed algorithms are demonstrated and discussed in this paper.

Zhou, Wensheng; Shen, Ye; Vellaikal, Asha; Kuo, C.-C. Jay

1998-10-01

370

Design-based metrology: advanced automation for CD-SEM recipe generation  

NASA Astrophysics Data System (ADS)

The procedure for properly implementing OPC for a new technology node or chip design involves multiple steps: selection of the RET (resolution enhance technique), selection of design rules, OPC Model Building, OPC Verification, CD control quantification (across chip, reticle, wafer, focus, exposure, etc), calibration of Optical Rule Checks (ORC), and other verification steps. Many of these steps require up to thousands of wafer measurements, and while state-of-the-art CD-SEM tools provide automated metrology for production, manually creating a CD recipe with thousands of unique sites is extremely tedious and error-prone. This places a practical limit on both the quality and number of measurements that can be acquired during the technology development and qualification period. At the same time, the number of measurements required to qualify a new reticle design has increased drastically due to the growing complexity of RET and diminishing tolerances. To meet this challenge, a direct and automated link from the design systems to the process metrology tools is needed. Novel methodologies must also be developed to enable automated generation of teh recipe from the design inputs and to translate the flood of metrology results into information that can improve the design, mask data processing, or the patterning process. To facilitate this two-way data flow, a new framework has been created enabling true Design-Based Metrology (DBM), and an application named OPC-Check has been developed to operate within this framework. This DBM framework provides the common language and interface that facilitates the direct transfer of desired measurement locations from teh design to the metrology tool. This link is a critical element in Design for Manufacturability (DFM) efforts, a central theme in many presentations at Microlithography 2005. This article discusses the significant benefits of the tight integration of design and process metrology for OPC implementation in a new technology node, and provides some examples of the novel OPC-Check application as currently implemented at AMD SDC with Applied Materials CD-SEM tools.

Tabery, C.; Capodieci, L.; Haidinyak, C.; Shah, K.; Threefoot, M.; Choo, B.; Singh, B.; Nehmadi, Y.; Ofek, C.; Menadeva, O.; Ben-Porath, A.

2005-05-01

371

Investigation of advanced nanostructured multijunction photoanodes for enhanced solar hydrogen generation via water splitting  

NASA Astrophysics Data System (ADS)

As the worldwide demand for fossil-based fuel increases every day and the fossil reserve continues to be depleted, the need for alternative/renewable energy sources has gained momentum. Electric, hybrid, and hydrogen cars have been at the center of discussion lately among consumers, automobile manufacturers, and politicians, alike. The development of a fuel-cell based engine using hydrogen has been an ambitious research area over the last few decades-ever since Fujishima showed that hydrogen can be generated via the solar-energy driven photo-electrolytic splitting of water. Such solar cells are known as Photo-Electro-Chemical (PEC) solar cells. In order to commercialize this technology, various challenges associated with photo-conversion efficiency, chemical corrosion resistance, and longevity need to be overcome. In general, metal oxide semiconductors such as titanium dioxide (TiO 2, titania) are excellent candidates for PEC solar cells. Titania nanotubes have several advantages, including biocompatibility and higher chemical stability. Nevertheless, they can absorb only 5-7% of the solar spectrum which makes it difficult to achieve the higher photo-conversion efficiency required for successful commercial applications. A two-prong approach was employed to enhance photo-conversion efficiency: 1) surface modification of titania nanotubes using plasma treatment and 2) nano-capping of the titania nanotubes using titanium disilicide. The plasma surface treatment with N2 was found to improve the photo-current efficiency of titania nanotubes by 55%. Similarly, a facile, novel approach of nano-capping titania nanotubes to enhance their photocurrent response was also investigated. Electrochemically anodized titania nanotubes were capped by coating a 25 nm layer of titanium disilicide using RF magnetron sputtering technique. The optical properties of titania nanotubes were not found to change due to the capping; however, a considerable increase (40%) in the photocurrent density was observed for the nano-capped titania nanotubes due to the enhanced charge transfer process. Similarly, another metal oxide semiconductor was investigated tungsten trioxide (WO3), which has a much higher absorption capability (12%) in the solar spectrum. The WO3 porous nanostructures suffered from surface corrosion resulting in a large reduction in the photocurrent density as a function of time in the alkaline electrolytes. However, with a protective coating of Indium Tin Oxide (100 nm), the surface corrosion of WO3 porous nanostructures was reduced. A large increase in the photocurrent density of as much as 340% was observed after the ITO was applied to the WO3 porous nanostructures

Ishihara, Hidetaka

372

An Advanced Next Generation Archival and Distribution System for Global Atmospheric Science Research  

NASA Astrophysics Data System (ADS)

NASA's Atmospheric Science Data Center at the NASA Langley Research Center has developed a new state- of-the-art data archival, and distribution system to serve the atmospheric sciences data provider and user communities. The new system, called Archive - Next Generation (ANGe), is replacing a large-scale science data management system, and is designed with a distributed, multi-tier, serviced-based, message oriented architecture enabling new methods for searching, accessing, and customizing data. The previous system required a user to actively manage a session in a web browser to sequentially search for and obtain data. The ANGe system is architected to allow programmatic calls to the archive via web services to obtain multiple data sets of interest to the user. The ANGe system is currently supporting Clouds and the Earth's Radiant Energy System (CERES) and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) data ingest, archival and distribution. In the future it will support CERES on National Polar-orbiting Operational Environmental Satellite System (NPOESS). Potential enhancements to this new system are web service access to the archive improving the user's ability to utilize multiple data sets managed at different locations via a Grid/Cloud computing environment. This technology distributes computationally intensive data processing for large data sets, and greatly improves the efficiency of extracting smaller pieces of data of interest to a specific study. Geospatial metadata can be managed in a PostGIS-enabled database, allowing for integration with mainstream GIS utilities and applications. The Atmospheric Science Data Center proposes to produce custom value-added data products and tailoring access to information and data to meet the needs of a diverse user community. Details of these new data access tools and capabilities, and potential enhancements will be discussed. The Atmospheric Science Data Center in Langley's Science Directorate leads NASA's program for the processing, archival and distribution of Earth science data in the areas of radiation budget, clouds, aerosols, and tropospheric chemistry. The Data Center was established in 1991 to support NASA's Earth Observing System and the U.S. Global Change Research Program. It is unique among NASA data centers in the size of its archive, cutting edge computing technology, and full range of data services. For more information regarding ASDC data holdings, documentation, tools and services, visit http://eosweb.larc.nasa.gov

Ritchey, N. A.; Kusterer, J. M.

2008-12-01

373

Advanced urothelial carcinoma: next-generation sequencing reveals diverse genomic alterations and targets of therapy.  

PubMed

Although urothelial carcinoma (UC) of the urinary bladder generally portends a favorable prognosis, metastatic tumors often follow an aggressive clinical course. DNA was extracted from 40??m of formalin-fixed, paraffin-embedded (FFPE) sections from 35 stage IV UCs that had relapsed and progressed after primary surgery and conventional chemotherapy. Next-generation sequencing (NGS) was performed on hybridization-captured, adaptor ligation-based libraries for 3320 exons of 182 cancer-related genes plus 37 introns from 14 genes frequently rearranged in cancer to at an average sequencing depth of 1164 × and evaluated for all classes of genomic alterations (GAs). Actionable GAs were defined as those impacting the selection of targeted anticancer therapies on the market or in registered clinical trials. A total of 139 GAs were identified, with an average of 4.0 GAs per tumor (range 0-10), of which 78 (56%) were considered actionable, with an average of 2.2 per tumor (range 0-7). Twenty-nine (83%) cases harbored at least one actionable GA including: PIK3CA (9 cases; 26%); CDKN2A/B (8 cases; 23%); CCND1 (5 cases; 14%); FGFR1 (5 cases; 14%); CCND3 (4 cases; 11%); FGFR3 (4 cases; 11%); MCL1 (4 cases; 11%); MDM2 (4 cases; 11%); EGFR (2 cases, 6%); ERBB2 (HER2/neu) (2 cases, 6%); NF1 (2 cases, 6%) and TSC1 (2 cases, 6%). Notable additional alterations included TP53 (19 cases, 54%) and RB1 (6 cases; 17%). Genes involved in chromatin modification were altered by nonsense mutation, splice site mutation or frameshift indel in a mutually exclusive manner in nearly half of all cases including KDM6A (10 cases; 29%) and ARID1A (7 cases; 20%). Comprehensive NGS of 35 UCs of the bladder revealed a diverse spectrum of actionable GAs in 83% of cases, which has the potential to inform treatment decisions for patients with relapsed and metastatic disease. PMID:23887298

Ross, Jeffrey S; Wang, Kai; Al-Rohil, Rami N; Nazeer, Tipu; Sheehan, Christine E; Otto, Geoff A; He, Jie; Palmer, Gary; Yelensky, Roman; Lipson, Doron; Ali, Siraj; Balasubramanian, Sohail; Curran, John A; Garcia, Lazlo; Mahoney, Kristen; Downing, Sean R; Hawryluk, Matthew; Miller, Vincent A; Stephens, Philip J

2014-02-01

374

Advanced numerical modeling and hybridization techniques for third-generation infrared detector pixel arrays  

NASA Astrophysics Data System (ADS)

Infrared (IR) detectors are well established as a vital sensor technology for military, defense and commercial applications. Due to the expense and effort required to fabricate pixel arrays, it is imperative to develop numerical simulation models to perform predictive device simulations which assess device characteristics and design considerations. Towards this end, we have developed a robust three-dimensional (3D) numerical simulation model for IR detector pixel arrays. We used the finite-difference time-domain technique to compute the optical characteristics including the reflectance and the carrier generation rate in the device. Subsequently, we employ the finite element method to solve the drift-diffusion equations to compute the electrical characteristics including the I(V) characteristics, quantum efficiency, crosstalk and modulation transfer function. We use our 3D numerical model to study a new class of detector based on the nBn-architecture. This detector is a unipolar unity-gain barrier device consisting of a narrow-gap absorber layer, a wide-gap barrier layer, and a narrow-gap collector layer. We use our model to study the underlying physics of these devices and to explain the anomalously long lateral collection lengths for photocarriers measured experimentally. Next, we investigate the crosstalk in HgCdTe photovoltaic pixel arrays employing a photon-trapping (PT) structure realized with a periodic array of pillars intended to provide broadband operation. The PT region drastically reduces the crosstalk; making the use of the PT structures not only useful to obtain broadband operation, but also desirable for reducing crosstalk, especially in small pitch detector arrays. Then, the power and flexibility of the nBn architecture is coupled with a PT structure to engineer spectrally filtering detectors. Last, we developed a technique to reduce the cost of large-format, high performance HgCdTe detectors by nondestructively screen-testing detector arrays prior to their final hybridization onto expensive silicon read-out integrated circuit (ROIC) chips. The approach is to temporarily hybridize each candidate HgCdTe detector array to a standard reusable ROIC for complete screen testing. We tested the technique by temporarily hybridizing LPE grown HgCdTe test chips to fan-out boards and characterizing their performance.

Schuster, Jonathan

375

Person-based video summarization and retrieval by tracking and clustering temporal face sequences  

NASA Astrophysics Data System (ADS)

People are often the most important subjects in videos. It is highly desired to automatically summarize the occurrences of different people in a large collection of video and quickly find the video clips containing a particular person among them. In this paper, we present a person-based video summarization and retrieval system named VideoWho which extracts temporal face sequences in videos and groups them into clusters, with each cluster containing video clips of the same person. This is accomplished based on advanced face detection and tracking algorithms, together with a semisupervised face clustering approach. The system achieved good clustering accuracy when tested on a hybrid video set including home video, TV plays and movies. On top of this technology, a number of applications can be built, such as automatic summarization of major characters in videos, person-related video search on the Internet and personalized UI systems etc.

Zhang, Tong; Wen, Di; Ding, Xiaoqing

2013-03-01

376

47 CFR 79.3 - Video description of video programming.  

Code of Federal Regulations, 2012 CFR

...Telecommunication 4 2012-10-01 2012-10-01 false Video description of video programming. 79.3 Section 79.3 Telecommunication... BROADCAST RADIO SERVICES CLOSED CAPTIONING AND VIDEO DESCRIPTION OF VIDEO PROGRAMMING § 79.3...

2012-10-01

377

47 CFR 79.3 - Video description of video programming.  

Code of Federal Regulations, 2013 CFR

...Telecommunication 4 2013-10-01 2013-10-01 false Video description of video programming. 79.3 Section 79.3 Telecommunication... BROADCAST RADIO SERVICES CLOSED CAPTIONING AND VIDEO DESCRIPTION OF VIDEO PROGRAMMING § 79.3...

2013-10-01

378

47 CFR 79.3 - Video description of video programming.  

Code of Federal Regulations, 2011 CFR

...Telecommunication 4 2011-10-01 2011-10-01 false Video description of video programming. 79.3 Section 79.3 Telecommunication... BROADCAST RADIO SERVICES CLOSED CAPTIONING AND VIDEO DESCRIPTION OF VIDEO PROGRAMMING § 79.3...

2011-10-01

379

Video Production For Short Educational Videos  

E-print Network

Video Production Handbook For Short Educational Videos Jennifer Cook Small Acreage Management recharges via computer Ultra HD has rechargeable AA battery pack Minimal functionality (color balance.soundslides.com Microphones Audio-Technica VHF Wireless system (lavalier microphone, transmitter, and receiver) $200 www

380

Video Google: Efficient Visual Search of Videos  

Microsoft Academic Search

We describe an approach to object retrieval which searches for and localizes all the occurrences of an object in a video, given a query image of the object. The object is represented by a set of viewpoint invariant region descriptors so that recognition can proceed successfully despite changes in viewpoint, illumination and partial occlusion. The temporal continuity of the video

Josef Sivic; Andrew Zisserman

2006-01-01

381

Video Screen Capture Basics  

ERIC Educational Resources Information Center

This article is an introduction to video screen capture. Basic information of two software programs, QuickTime for Mac and BlueBerry Flashback Express for PC, are also discussed. Practical applications for video screen capture are given.

Dunbar, Laura

2014-01-01

382

Bioenergy: Educational Videos  

NSDL National Science Digital Library

The Ohio State University provides this page of educational videos related to bioenergy. Four videos are included demonstrating an anaerobic digestion experiment, showing algae research to reduce carbon emissions, using methane to produce energy, and creating fuel from landfills.

2013-06-25

383

Video Relay Services  

MedlinePLUS

... video camera device and a broadband (high speed) Internet connection, contacts a VRS CA, who is a ... CA can be reached through the VRS provider’s Internet site, or through video equipment attached to a ...

384

Video face replacement  

E-print Network

We present a method for replacing facial performances in video. Our approach accounts for differences in identity, visual appearance, speech, and timing between source and target videos. Unlike prior work, it does not ...

Dale, Kevin

385

NASA's Myriad Uses of Digital Video  

NASA Technical Reports Server (NTRS)

Since it's inception, NASA has created many of the most memorable images seen this Century. From the fuzzy video of Neil Armstrong taking that first step on the moon, to images of the Mars surface available to all on the internet, NASA has provided images to inspire a generation, all because a scientist or researcher had a requirement to see something unusual. Digital Television technology will give NASA unprecedented new tools for acquiring, analyzing, and distributing video. This paper will explore NASA's DTV future. The agency has a requirement to move video from one NASA Center to another, in real time. Specifics will be provided relating to the NASA video infrastructure, including video from the Space Shuttle and from the various Centers. A comparison of the pros and cons of interlace and progressive scanned images will be presented. Film is a major component of NASA's image acquisition for analysis usage. The future of film within the context of DTV will be explored.

Grubbs, Rodney; Lindblom, Walt; George, Sandy

1999-01-01

386

VIDEO PRESENTATION AND COMPRESSION  

Microsoft Academic Search

This chapter we first presents various video representations and formats. Then, an overview of video compression techniques is given. Two standards and related techniques are described and evaluated - px64 Kbps (or H.261\\/H.263) standard for video-based communications and MPEG standard for intensive applications of full-motion video. Both standards use the combination of DCT-based intraframe compression and predictive interframe coding based

Borko Furht; Raymond Westwater

387

Informedia Digital Video Library  

Microsoft Academic Search

The Informedia Digital Video Library Project is developing new technologies for creating full-content search and retrieval digital video libraries. Working in collaboration with WQED Pittsburgh, the project is creating a testbed that will enable K-12 students to access, explore, and retrieve science and mathematics materials from the digital video library. The library will initially contain 1,000 hours of video from

Michael G. Christel; Takeo Kanade; M. Mauldin; Raj Reddy; Marvin A. Sirbu; Scott M. Stevens; Howard D. Wactlar

1995-01-01

388

Video Event Detection Framework on Large-Scale Video Data  

ERIC Educational Resources Information Center

Detection of events and actions in video entails substantial processing of very large, even open-ended, video streams. Video data present a unique challenge for the information retrieval community because properly representing video events is challenging. We propose a novel approach to analyze temporal aspects of video data. We consider video data…

Park, Dong-Jun

2011-01-01

389

VIDEO SUMMARIZATION BY VIDEO STRUCTURE ANALYSIS AND GRAPH OPTIMIZATION  

E-print Network

VIDEO SUMMARIZATION BY VIDEO STRUCTURE ANALYSIS AND GRAPH OPTIMIZATION Shi Lu, Irwin King video summarization method that combines video structure analysis and graph optimiza- tion. First, we analyze the structure of the video, find the boundaries of video scenes, then we calculate each scene

King, Kuo Chin Irwin

390

Landing zone determination using video rate point cloud data  

NASA Astrophysics Data System (ADS)

LADAR technology is used in remote sensing to monitor many parameters like particles and gases suspended in the atmosphere, measure velocity, 3-D mapping, etc. Its application for 3-D mapping is of great interest in the geospatial community. A LADAR system is capable of scanning the surface of an object by forming thousands or millions of points in the 3-D space. New advances in LADAR technology have been pushing towards 4-D data (x, y, z, and time). These systems are capable of operating in the same way as a video camera up to 30 frames per second. Sampling a scene in the 4-D domain is very attractive for military and civilian applications. This work presents an algorithm capable of using the 4-D measurements recorded by a LADAR system to generate a 3-D video. The algorithm provides a feature extraction tool that is used to identify and rank safe landing zones within the 3-D video point cloud dataset. We use parameters such as terrain irregularities, terrain slope or gradients, and distances from vertical obstructions to identify and rank safe landing zones. Other additional mission specific requirements can be included to further filter and rank safe landing zones.

Rodgers, Christopher; Méndez, Javier

2012-06-01

391

Rheumatoid Arthritis Educational Video Series  

MedlinePLUS

Rheumatoid Arthritis Educational Video Series This series of five videos was designed to help you learn more about Rheumatoid Arthritis (RA). You will ... Activity Role of Body Weight in Osteoarthritis Educational Videos for Patients Rheumatoid Arthritis Educational Video Series Psoriatic ...

392

Design of a Composite Video Signal for DVD Recorder Measurement System Based on Virtual Instrument Technology  

Microsoft Academic Search

In this paper, a new source video signal is designed for online DVD evaluation and then its composite video signal waveform is produced through a video waveform generator board PXI-5431. The composite video field, no matter NTSC or PAL system it is, includes both visible image and invisible lines. The visible image has been set to different patterns, and the

Wang Xiaotao; Liu Hongbo; Wang Jizhou; Xu Zhixiang

2007-01-01

393

Semantic Video Summarization Using Mutual Reinforcement Principle and Shot Arrangement Patterns  

E-print Network

Semantic Video Summarization Using Mutual Reinforcement Principle and Shot Arrangement Patterns Shi a novel semantic video summarization framework, which generates video skimmings that guaran- tee both the balanced content coverage and the visual co- herence. First, we collect video semantic information

King, Kuo Chin Irwin

394

Multi-level video content represntation and retrieval  

NASA Astrophysics Data System (ADS)

In this article, several practical algorithms are proposed to support content-based video analysis, modeling, representation, summarization, indexing, and access. First, a multilevel video database model is given. One advantage of this model is that it provides a reasonable approach to bridging the gap between low-level representative features and high-level semantic concepts from a human point of view. Second, several model-based video analysis techniques are proposed. In order to detect the video shots, we present a novel technique, which can adapt the threshold for scene cut detection to the activities of variant videos or even different video shots. A seeded region aggregation and temporal tracking technique is proposed for generating the semantic video objects. The semantic video scenes can then be generated from these extracted video access units (e.g., shots and objects) according to some domain knowledge. Third, in order to categorize video contents into a set of semantic clusters, an integrated video classification technique is developed to support more efficient multilevel video representation, summarization, indexing, and access techniques.

Fan, Jianping; Aref, Walid G.; Elmagarmid, Ahmed K.; Hacid, Mohand-Said; Marzouk, Mirette S.; Zhu, Xingquan

2001-10-01

395

Video Self-Modeling  

ERIC Educational Resources Information Center

Video self-modeling (VSM) first appeared on the psychology and education stage in the early 1970s. The practical applications of VSM were limited by lack of access to tools for editing video, which is necessary for almost all self-modeling videos. Thus, VSM remained in the research domain until the advent of camcorders and VCR/DVD players and,…

Buggey, Tom; Ogle, Lindsey

2012-01-01

396

Video: Modalities and Methodologies  

ERIC Educational Resources Information Center

In this article, we set out to explore what we describe as the use of video in various modalities. For us, modality is a synthesizing construct that draws together and differentiates between the notion of "video" both as a method and as a methodology. It encompasses the use of the term video as both product and process, and as a data collection…

Hadfield, Mark; Haw, Kaye

2012-01-01

397

Developing a Promotional Video  

ERIC Educational Resources Information Center

There is a need for Extension professionals to show clientele the benefits of their program. This article shares how promotional videos are one way of reaching audiences online. An example is given on how a promotional video has been used and developed using iMovie software. Tips are offered for how professionals can create a promotional video and…

Epley, Hannah K.

2014-01-01

398

Guitarbuilding Fabrication Video Series  

NSDL National Science Digital Library

This page from the Guitarbuilding project provides a number of very interesting videos on the design and manufacturing of guitars. Videos cover topics like performing basic wood repairs on guitars, soldering and wiring techniques, gluing fretboards to guitar necks and assembling the pickups to the pickup rings. The videos vary in length, and Flash is required to view them.

2011-11-18

399

Designing Video Classrooms.  

ERIC Educational Resources Information Center

Discusses design factors for using one-way video and audio, one-way video with two-way audio, and two-way video and audio in adult education. Considerations for audio quality, lighting, room arrangement, seating comfort, and decor are presented with illustrations. (SK)

Price, Michael A.

1991-01-01

400

The Digital Interactive Video  

E-print Network

The Digital Interactive Video Exploration and Reflection (Diver) system lets users create virtual pathways through existing video content using a virtual camera and an annotation window for commentary repurposing, and discussion. W ith the inexorable growth of low-cost consumer video elec- tronics

Paris-Sud XI, Université de

401

Digitales Video Martin Knopp  

E-print Network

Digitales Video Martin Knopp Thomas Hach � #12;Technische Universität MünchenLehrstuhl für Datenverarbeitung Bayermaske - Original 14Digitales Video #12;Technische Universität MünchenLehrstuhl für Datenverarbeitung Bayermaske - ,,Bayermasken-Bild" 15Digitales Video #12;Technische Universität MünchenLehrstuhl für

402

Video Gallery: Shark Dissection  

NSDL National Science Digital Library

This video gallery is from the Museum's Seminars on Science, a series of distance-learning courses designed to help educators meet the new national science standards. There are 16 videos each covering dissection of a different part of the dogfish shark. There is a downloadable pdf for each video.

403

Video Games in Psychotherapy  

Microsoft Academic Search

Video games have found their way into the clinical care of youth in most medical fields, and academic interest in their use is increasing steadily. The popularity of video games among youth may qualify them as a useful tool in psychotherapy for children and adolescents. Limited literature on use of video games in mental health care suggests that they can

T. Atilla Ceranoglu

2010-01-01

404

AdBlockVideo  

NSDL National Science Digital Library

Video ads can be quite a nuisance. AdBlockVideo can help users out by effectively blocking such ads. Visitors will need to download the program and they can toggle AdBlockVideo on and off as they see fit. This application is compatible with computers running Windows 98 and newer, Max OS 10.3 and newer, and Linux.

2011-01-01

405

Perceptual tools for quality-aware video networks  

NASA Astrophysics Data System (ADS)

Monitoring and controlling the quality of the viewing experience of videos transmitted over increasingly congested networks (especially wireless networks) is a pressing problem owing to rapid advances in video-centric mobile communication and display devices that are straining the capacity of the network infrastructure. New developments in automatic perceptual video quality models offer tools that have the potential to be used to perceptually optimize wireless video, leading to more efficient video data delivery and better received quality. In this talk I will review key perceptual principles that are, or could be used to create effective video quality prediction models, and leading quality prediction models that utilize these principles. The goal is to be able to monitor and perceptually optimize video networks by making them "quality-aware."

Bovik, A. C.

2014-01-01

406

Video Guidance Sensor and Time-of-Flight Rangefinder  

NASA Technical Reports Server (NTRS)

A proposed video guidance sensor (VGS) would be based mostly on the hardware and software of a prior Advanced VGS (AVGS), with some additions to enable it to function as a time-of-flight rangefinder (in contradistinction to a triangulation or image-processing rangefinder). It would typically be used at distances of the order of 2 or 3 kilometers, where a typical target would appear in a video image as a single blob, making it possible to extract the direction to the target (but not the orientation of the target or the distance to the target) from a video image of light reflected from the target. As described in several previous NASA Tech Briefs articles, an AVGS system is an optoelectronic system that provides guidance for automated docking of two vehicles. In the original application, the two vehicles are spacecraft, but the basic principles of design and operation of the system are applicable to aircraft, robots, objects maneuvered by cranes, or other objects that may be required to be aligned and brought together automatically or under remote control. In a prior AVGS system of the type upon which the now-proposed VGS is largely based, the tracked vehicle is equipped with one or more passive targets that reflect light from one or more continuous-wave laser diode(s) on the tracking vehicle, a video camera on the tracking vehicle acquires images of the targets in the reflected laser light, the video images are digitized, and the image data are processed to obtain the direction to the target. The design concept of the proposed VGS does not call for any memory or processor hardware beyond that already present in the prior AVGS, but does call for some additional hardware and some additional software. It also calls for assignment of some additional tasks to two subsystems that are parts of the prior VGS: a field-programmable gate array (FPGA) that generates timing and control signals, and a digital signal processor (DSP) that processes the digitized video images. The additional timing and control signals generated by the FPGA would cause the VGS to alternate between an imaging (direction-finding) mode and a time-of-flight (range-finding mode) and would govern operation in the range-finding mode.

Bryan, Thomas; Howard, Richard; Bell, Joseph L.; Roe, Fred D.; Book, Michael L.

2007-01-01

407

A Novel Key-Frame Extraction Approach for Both Video Summary and Video Index  

PubMed Central

Existing key-frame extraction methods are basically video summary oriented; yet the index task of key-frames is ignored. This paper presents a novel key-frame extraction approach which can be available for both video summary and video index. First a dynamic distance separability algorithm is advanced to divide a shot into subshots based on semantic structure, and then appropriate key-frames are extracted in each subshot by SVD decomposition. Finally, three evaluation indicators are proposed to evaluate the performance of the new approach. Experimental results show that the proposed approach achieves good semantic structure for semantics-based video index and meanwhile produces video summary consistent with human perception. PMID:24757431

Lei, Shaoshuai; Xie, Gang; Yan, Gaowei

2014-01-01

408

Real-time video streaming using H.264 scalable video coding (SVC) in multihomed mobile networks: a testbed approach  

NASA Astrophysics Data System (ADS)

Users of the next generation wireless paradigm known as multihomed mobile networks expect satisfactory quality of service (QoS) when accessing streamed multimedia content. The recent H.264 Scalable Video Coding (SVC) extension to the Advanced Video Coding standard (AVC), offers the facility to adapt real-time video streams in response to the dynamic conditions of multiple network paths encountered in multihomed wireless mobile networks. Nevertheless, preexisting streaming algorithms were mainly proposed for AVC delivery over multipath wired networks and were evaluated by software simulation. This paper introduces a practical, hardware-based testbed upon which we implement and evaluate real-time H.264 SVC streaming algorithms in a realistic multihomed wireless mobile networks environment. We propose an optimised streaming algorithm with multi-fold technical contributions. Firstly, we extended the AVC packet prioritisation schemes to reflect the three-dimensional granularity of SVC. Secondly, we designed a mechanism for evaluating the effects of different streamer 'read ahead window' sizes on real-time performance. Thirdly, we took account of the previously unconsidered path switching and mobile networks tunnelling overheads encountered in real-world deployments. Finally, we implemented a path condition monitoring and reporting scheme to facilitate the intelligent path switching. The proposed system has been experimentally shown to offer a significant improvement in PSNR of the received stream compared with representative existing algorithms.

Nightingale, James; Wang, Qi; Grecos, Christos

2011-03-01

409

Science: Video Portal  

NSDL National Science Digital Library

The folks at Science magazine craft a wide palette of audio visual materials, many of which can be accessed through their video portal. In the Featured Videos, visitors can learn about some recent explorations into education reform, deep sea explorations, and the Higgs boson. Scrolling down the site, visitors will notice that the videos are divided into seven sections, including Engineering, Environment, and Medicine. It's easy to see how these videos could be effectively used in a number of classroom situations to complement existing lectures and presentations. New users might do well to start with the "Alya Red: A Computational Heart" video and the rather thoughtful "California Meteorite Rush." [KMG

2010-01-01

410

Generations.  

PubMed

Groups naturally promote their strengths and prefer values and rules that give them an identity and an advantage. This shows up as generational tensions across cohorts who share common experiences, including common elders. Dramatic cultural events in America since 1925 can help create an understanding of the differing value structures of the Silents, the Boomers, Gen Xers, and the Millennials. Differences in how these generations see motivation and values, fundamental reality, relations with others, and work are presented, as are some applications of these differences to the dental profession. PMID:16623137

Chambers, David W

2005-01-01

411

Video game device haptic interface for robotic arc welding  

Microsoft Academic Search

Recent advances in technology for video games have made a broad array of haptic feedback devices available at low cost. This paper presents a bi-manual haptic system to enable an operator to weld remotely using a commercially available haptic feedback video game device for the user interface. The system showed good performance in initial tests, demonstrating the utility of low

Corrie I. Nichol; Milos Manic

2009-01-01

412

Video Summarization Based on User Interaction Dan R. Olsen Jr.  

E-print Network

" step is rapidly disappearing from internet television content. This ability to shift video without time use is granted without fee provided that copies are not made or distributed for profit or commercial, interactive television, sports 1. INTRODUCTION Recent advances in internet video technology are the precursors

Olsen Jr., Dan R.

413

Facial expression recognition from video sequences: temporal and static modeling  

Microsoft Academic Search

The most expressive way humans display emotions is through facial expressions. In this work we report on several advances we have made in building a system for classification of facial expressions from continuous video input. We introduce and test different Bayesian network classifiers for classifying expressions from video, focus- ing on changes in distribution assumptions and feature dependency structures. In

Ira Cohen; Nicu Sebe; Ashutosh Garg; Lawrence S. Chen; Thomas S. Huang

2003-01-01

414

Artificial Intelligence in Modern Video Games: A Survey  

Microsoft Academic Search

Video games continue to evolve at an incredible rate, and with this comes advances in technology and the artificial intelligence behind them. Artificial intelligence is highly involved in many aspects of game design, and along with the graphics, is responsible for the believability of any game. In this paper we will discuss many different aspects of AI in the video

Sam Palecek; Ryan Watermiller

415

VideoLab: Optogenetic Pacemaker  

NSDL National Science Digital Library

In mammals, the heart's primary pacemaker lies in a specialized group of cells -- but do non-mammalian vertebrates have a similar control system? To find out, Arrenberg et al. genetically engineered zebrafish to express light-sensitive proteins, and then used light beams generated with a digital micromirror device to locate and manipulate the function of the pacemaker cells in the hearts of zebrafish embryos -- capturing the action on high-speed video.

Aristides B. Arrenberg (University of California; University of Freiburg;Department of Physiology; Institute of Biology); Didier Y. R. Stainier (University of California;Department of Biochemistry and Biophysics and Cardiovascular Research Institute); Herwig Baier (University of California;Department of Physiology); Jan Huisken (University of California; Max Planck Institute of Molecular Cell Biology and Genetics;Department of Biochemistry and Biophysics and Cardiovascular Research Institute)

2010-11-12

416

Discussing dying in the diaspora: attitudes towards advance care planning among first generation Dutch and Italian migrants in rural Australia.  

PubMed

Western cultural practices and values have largely shaped advance care planning (ACP) policies across the world. Low uptake of ACP among ethnic minority groups in Western countries has been interpreted with reference to cultural differences. This paper adopts a life-history approach to explore attitudes towards ACP among older, first-generation Dutch-Australian and Italian-Australian migrants. Thirty people participated in extended ethnographic interviews (N = 17) and group discussions (N = 13) during 2012. Transcripts were thematically analyzed and interpreted using a Foucauldian perspective on knowledge and power. Migration experiences, ongoing contact with the native country and participation in migrant community support networks influenced attitudes towards ACP. Dutch participants framed ACP discussions with reference to euthanasia, and adopted a more individualist approach to medical decision-making. Italian participants often spoke of familial roles and emphasized a family-based decision making style. The importance of migrant identity has been neglected in previous discussions of cultural factors influencing ACP uptake among ethnic minority groups. The unique migration experience should be considered alongside culturally appropriate approaches to decision-making, in order to ensure equitable access to ACP among migrant groups. PMID:24560228

Sinclair, Craig; Smith, Jessica; Toussaint, Yann; Auret, Kirsten

2014-01-01

417

Vitual Camera Control System for Cinematographic 3D Video Rendering  

Microsoft Academic Search

We propose a virtual camera control system that creates attractive videos from 3D models generated with a virtualized reality system. The proposed camera control system helps the user to generate final videos from the 3D model by referring to the grammar of film language. Many kinds of camera shots and principal camera actions are stored in the system as expertise.

Hansung Kim; Ryuuki Sakamoto; Itaru Kitahara; Tomoji Toriyama; Kiyoshi Kogure

2007-01-01

418

Feature-preserving image/video compression  

NASA Astrophysics Data System (ADS)

Advances in digital image processing, the advents of multimedia computing, and the availability of affordable high quality digital cameras have led to increased demand for digital images/videos. There has been a fast growth in the number of information systems that benefit from digital imaging techniques and present many tough challenges. In this paper e are concerned with applications for which image quality is a critical requirement. The fields of medicine, remote sensing, real time surveillance, and image-based automatic fingerprint/face identification systems are all but few examples of such applications. Medical care is increasingly dependent on imaging for diagnostics, surgery, and education. It is estimated that medium size hospitals in the US generate terabytes of MRI images and X-Ray images are generated to be stored in very large databases which are frequently accessed and searched for research and training. On the other hand, the rise of international terrorism and the growth of identity theft have added urgency to the development of new efficient biometric-based person verification/authentication systems. In future, such systems can provide an additional layer of security for online transactions or for real-time surveillance.

Al-Jawad, Naseer; Jassim, Sabah

2005-10-01

419

Advancing climate studies in the Asia-Pacific region with the next generation GNSS and an innovative radio occultation technique  

NASA Astrophysics Data System (ADS)

The global positioning system (GPS) radio occultation (RO) technique has demonstrated great potential for climate monitoring. Since the first GPS RO mission GPS/MET launched in 1995, dozens of satellites have successfully produced quality atmospheric profiles. CHAMP and FORMOSAT-3/COSMIC RO missions proved to be very useful for long-term climate studies. The next generation FORMOSAT-7/COSMIC-2 RO mission will be the first capable of receiving signals not only from GPS satellites but also other Global Navigation Satellite Systems (GNSS). Due to the increased number of GNSS satellites utilized, higher spatial and temporal resolution of atmospheric observation can be achieved using the same number of RO satellites. Moreover, multiple GNSS mean more frequencies available for the data retrieval process and higher quality of the data products can be expected. Regional climate studies will gain benefits from the increased quantity and quality of RO atmospheric profiles. The National Climate Centre at the Australian Bureau of Meteorology, as a leading climate research agency in Southern Hemisphere, has utilized GPS RO data in various studies for the Asia-Pacific region and will continue to use the improved observations for a broader range of applications. A simulation study is carried out to examine the impact (benefit) of the next generation RO mission for the climate studies in the Asia-Pacific region. The number and distribution of RO events from FORMOSAT-7/COSMIC-2 with multiple GNSS (i.e. GPS, Glonass, Galileo Beidou and QZSS) are modelled. The results show that the number of daily RO retrievals in the Asia-Pacific region will increase from a few hundreds to over three thousands due to the use of multiple GNSS. A several demonstrating studies are carried out based on the future available RO atmospheric data. An innovative analytical technique based on the relationships among the derivatives of the phase, eikonal and Doppler frequency over time and the intensity of GPS transmitted radio waves through the Earth' atmosphere has also been developed. This technique is applied to the identification and location of the plasma layers in the lower ionosphere by use of GPS RO data. This is highly important for determination of the location of the vertical wind shear and the direction of internal wave propagation in the lower ionosphere, and possibly in the atmosphere. Application of this innovative technique, particularly in combination with the next generation GNSS RO data, could advance climate research, for example, our understanding of tropical cyclone genesis and development in the Asia-Pacific region.

Kuleshov, Y.; Fu, E.; Zhang, K.; Silcock, D.; Pavelyev, A. G.

2012-04-01

420

Design of the Next Generation Nuclear Plant Graphite Creep Experiments for Irradiation in the Advanced Test Reactor  

SciTech Connect

The United States Department of Energy’s Next Generation Nuclear Plant (NGNP) Program will be irradiating six gas reactor graphite creep experiments in the Advanced Test Reactor (ATR) located at the Idaho National Laboratory (INL). The ATR has a long history of irradiation testing in support of reactor development and the INL has been designated as the new United States Department of Energy’s lead laboratory for nuclear energy development. The ATR is one of the world’s premiere test reactors for performing long term, high flux, and/or large volume irradiation test programs. These graphite irradiations are being accomplished to support development of the next generation reactors in the United States. The graphite experiments will be irradiated over the next six to eight years to support development of a graphite irradiation performance data base on the new nuclear grade graphites now available for use in high temperature gas reactors. The goals of the irradiation experiments are to obtain irradiation performance data at different temperatures and loading conditions to support design of the Next Generation Nuclear Plant Very High Temperature Gas Reactor, as well as other future gas reactors. The experiments will each consist of a single capsule that will contain seven separate stacks of graphite specimens. Six of the specimen stacks will have half of their graphite specimens under a compressive load, while the other half of the specimens will not be subjected to a compressive load during irradiation. The six stacks will be organized into pairs with a different compressive load being applied to the top half of each pair of specimen stacks. The seventh stack will not have a compressive load on the graphite specimens during irradiation. The specimens will be irradiated in an inert sweep gas atmosphere with on-line temperature and compressive load monitoring and control. There will also be the capability of sampling the sweep gas effluent to determine if any oxidation or off-gassing of the specimens occurs during initial start-up of the experiment. The final design phase for the first experiment was completed in September 2008, and the fabrication and assembly of the experiment test train as well as installation and testing of the control and support systems that will monitor and control the experiment during irradiation are being completed in early calendar 2009. The first experiment is scheduled to be ready for insertion in the ATR by April 30, 2009. This paper will discuss the design of the experiment including the test train and the temperature and compressive load monitoring, control, and data collection systems.

S. Blaine Grover

2009-05-01

421

Video Fingerprinting: Features for Duplicate and Similar Video Detection and Query-based Video Retrieval  

E-print Network

Video Fingerprinting: Features for Duplicate and Similar Video Detection and Query-based Video and Computer Engineering University of California, Santa Barbara, CA 93106 ABSTRACT A video "fingerprint" is a feature extracted from the video that should represent the video compactly, allowing faster search without

California at Santa Barbara, University of

422

Genome Sequencing Center Tour Videos and Classroom Activities  

NSDL National Science Digital Library

A video tour of the Washington University Genome Sequencing CenterâÂÂsupplemented by additional films and classroom activitiesâÂÂcan help advanced high school students and college undergraduates understand the classical techniques of genome sequencing.

Sarah Elgin (Washington University;)

2010-05-28

423

Violent Video Games as Exemplary Teachers  

Microsoft Academic Search

Abstract A great deal is known about how to teach effectively. We describe several ofthe “best practices” of learning and instruction, and show how violent video games use those practices. Three hypotheses are advanced and tested. First, curricula that teach the same underlying conceptsacross contexts and domains have the best likelihood of transfer. Second, learning is more likely to be

Douglas A. Gentile; J. Ronald Gentile

424

Negotiating Privacy Preferences in Video Surveillance Systems  

E-print Network

privacy settings: L0 (no privacy), L1 (face blur), and L2 (full body blur). User can thus choose the level Surveillance, Privacy, Interactive Video Surveillance 1 Introduction Recent advances in image processing homes, hospitals, assisted living facilities for the elderly, smart meeting rooms, etc. A timely

Toronto, University of

425

Learning Science Through Digital Video: Views on Watching and Creating Videos  

NASA Astrophysics Data System (ADS)

In science, the use of digital video to document phenomena, experiments and demonstrations has rapidly increased during the last decade. The use of digital video for science education also has become common with the wide availability of video over the internet. However, as with using any technology as a teaching tool, some questions should be asked: What science is being learned from watching a YouTube clip of a volcanic eruption or an informational video on hydroelectric power generation? What are student preferences (e.g. multimedia versus traditional mode of delivery) with regard to their learning? This study describes 1) the efficacy of watching digital video in the science classroom to enhance student learning, 2) student preferences of instruction with regard to multimedia versus traditional delivery modes, and 3) the use of creating digital video as a project-based educational strategy to enhance learning. Undergraduate non-science majors were the primary focus group in this study. Students were asked to view video segments and respond to a survey focused on what they learned from the segments. Additionally, they were asked about their preference for instruction (e.g. text only, lecture-PowerPoint style delivery, or multimedia-video). A majority of students indicated that well-made video, accompanied with scientific explanations or demonstration of the phenomena was most useful and preferred over text-only or lecture instruction for learning scientific information while video-only delivery with little or no explanation was deemed not very useful in learning science concepts. The use of student generated video projects as learning vehicles for the creators and other class members as viewers also will be discussed.

Wade, P.; Courtney, A. R.

2013-12-01

426

A Multimodal Scheme for Program Segmentation and Representation in Broadcast Video Streams  

Microsoft Academic Search

With the advance of digital video recording and playback systems, the request for efficiently managing recorded TV video programs is evident so that users can readily locate and browse their favorite programs. In this paper, we propose a multimodal scheme to segment and represent TV video streams. The scheme aims to recover the temporal and structural characteristics of TV programs

Jinqiao Wang; Ling-Yu Duan; Qingshan Liu; Hanqing Lu; Jesse S. Jin

2008-01-01

427

Non-Linear Depth Map Resampling for Depth-Enhanced 3D Video Coding  

E-print Network

reduction. Index Terms--MVC, depth map, resampling, non-linear. I. INTRODUCTION The multiview video plus of the Advanced Video Coding standard, H.264/MVC [4], as well as to the ongoing High Efficiency Video Coding (HEVC) standardization. As one consequence of the 3DV CfP, a H.264/MVC-based test model [5] (hereafter referred to as 3DV

Gabbouj, Moncef

428

Block level buffer management for video streaming services in IPTV environments  

Microsoft Academic Search

With the widespread adoption of broadband Internet services and recent advances in video technologies, Internet Protocol Television (IPTV) is becoming increasingly popular. IPTV provides a variety of interesting services such as VOD (Video on Demand), PVR (Personal Video Recorder), game, shopping as well as live TV broadcast. In order to support various interactive services of IPTV, more elaborate software should

Ohhoon Kwon; Taeseok Kim; Hyokyung Bahn

2010-01-01

429

Fine-mapping nicotine resistance loci in Drosophila using a multiparent advanced generation inter-cross population.  

PubMed

Animals in nature are frequently challenged by toxic compounds, from those that occur naturally in plants as a defense against herbivory, to pesticides used to protect crops. On exposure to such xenobiotic substances, animals mount a transcriptional response, generating detoxification enzymes and transporters that metabolize and remove the toxin. Genetic variation in this response can lead to variation in the susceptibility of different genotypes to the toxic effects of a given xenobiotic. Here we use Drosophila melanogaster to dissect the genetic basis of larval resistance to nicotine, a common plant defense chemical and widely used addictive drug in humans. We identified quantitative trait loci (QTL) for the trait using the DSPR (Drosophila Synthetic Population Resource), a panel of multiparental advanced intercross lines. Mapped QTL collectively explain 68.4% of the broad-sense heritability for nicotine resistance. The two largest-effect loci-contributing 50.3 and 8.5% to the genetic variation-map to short regions encompassing members of classic detoxification gene families. The largest QTL resides over a cluster of ten UDP-glucuronosyltransferase (UGT) genes, while the next largest QTL harbors a pair of cytochrome P450 genes. Using RNAseq we measured gene expression in a pair of DSPR founders predicted to harbor different alleles at both QTL and showed that Ugt86Dd, Cyp28d1, and Cyp28d2 had significantly higher expression in the founder carrying the allele conferring greater resistance. These genes are very strong candidates to harbor causative, regulatory polymorphisms that explain a large fraction of the genetic variation in larval nicotine resistance in the DSPR. PMID:25236448

Marriage, Tara N; King, Elizabeth G; Long, Anthony D; Macdonald, Stuart J

2014-09-01

430

New video pupillometer  

NASA Astrophysics Data System (ADS)

An instrument is developed to measure pupil diameter from both eyes in the dark. Each eye is monitored with a small IR video camera and pupil diameters are calculated from the video signal at a rate of 60 Hz. A processing circuit, designed around a video digitizer, a digital logic circuit, and a microcomputer, extracts pupil diameter from each video frame in real time. This circuit also highlights the detected outline of the pupil on a monitored video image of each eye. Diameters are exported to a host computer that displays, graphs, analyzes, and stores them as pupillograms. The host computer controls pupil measurements and can turn on a yellow light emitting diode mounted just above each video camera to excite the pupillary light reflex. We present examples of pupillograms to illustrate how this instrument is used to measure the pupillary light reflex and pupil motility in the dark.

McLaren, Jay W.; Fjerstad, Wayne H.; Ness, Anders B.; Graham, Matthew D.; Brubaker, Richard F.

1995-03-01

431

Video Toroid Cavity Imager  

DOEpatents

A video toroid cavity imager for in situ measurement of electrochemical properties of an electrolytic material sample includes a cylindrical toroid cavity resonator containing the sample and employs NMR and video imaging for providing high-resolution spectral and visual information of molecular characteristics of the sample on a real-time basis. A large magnetic field is applied to the sample under controlled temperature and pressure conditions to simultaneously provide NMR spectroscopy and video imaging capabilities for investigating electrochemical transformations of materials or the evolution of long-range molecular aggregation during cooling of hydrocarbon melts. The video toroid cavity imager includes a miniature commercial video camera with an adjustable lens, a modified compression coin cell imager with a fiat circular principal detector element, and a sample mounted on a transparent circular glass disk, and provides NMR information as well as a video image of a sample, such as a polymer film, with micrometer resolution.

Gerald, Rex E. II; Sanchez, Jairo; Rathke, Jerome W.

2004-08-10

432

VideoANT: Extending Online Video Annotation beyond Content Delivery  

ERIC Educational Resources Information Center

This paper expands the boundaries of video annotation in education by outlining the need for extended interaction in online video use, identifying the challenges faced by existing video annotation tools, and introducing Video-ANT, a tool designed to create text-based annotations integrated within the time line of a video hosted online. Several…

Hosack, Bradford

2010-01-01

433

IME Video Library http://videos.med.wisc.edu  

E-print Network

IME Video Library http://videos.med.wisc.edu A collection of free streaming audio and video@wisc.edu Phone: (608) 263-6315 Fax: (608) 262-4732 http://videos.med.wisc.edu Exciting presentations added daily! What types of presentations are in the Video Library? Expert lecturers from the University of Wisconsin

Wisconsin at Madison, University of

434

Video and Image Processing in Multimedia Systems (Video Processing)  

E-print Network

COT 6930 Video and Image Processing in Multimedia Systems (Video Processing) Instructor: Borko. Content-based image and video indexing and retrieval. Video processing using compressed data. Course concepts and structures 4. Classification of compression techniques 5. Image and video compression

Furht, Borko

435

Robust Video Fingerprinting for Content-Based Video Identification  

Microsoft Academic Search

Video fingerprints are feature vectors that uniquely characterize one video clip from another. The goal of video fingerprinting is to identify a given video query in a database by measuring the distance between the query fingerprint and the fingerprints in the database. The performance of a video fingerprinting system, which is usually measured in terms of pairwise independence and robustness,

Sunil Lee; Chang D. Yoo

2008-01-01

436

Football Video Segmentation Based on Video Production Strategy  

E-print Network

Football Video Segmentation Based on Video Production Strategy Reede Ren and Joemon M. Jose}@dcs.gla.ac.uk Abstract. We present a statistical approach for parsing football video structures. Based on video data. 1 Introduction Many techniques have been developed in the literature for football video anal

Jose, Joemon M.

437

Video Avatar: Embedded Video for Collaborative Virtual Environment  

Microsoft Academic Search

This paper proposes the video avatar, an avatar with embedded video of the human body in a collaborative virtual environment. The video avatar enables visual communication between avatars. The video avatar has three features for enhancing visual communication. The target object function and the comment function enhance the gesture of the avatar. These functions integrate the embedded video and the

Shunsuke Yura; Tonionori Usaka; Ken Sakamura

1999-01-01

438

Studying the process and impact of site-produced peer-to-peer video tutorials| A case study approach.  

E-print Network

?? Rapidly advancing technology offers educators new tools to help increase student achievement. Through one such technology—digital video authoring—students can readily create video tutorials for… (more)

Lansdown, Roy

2010-01-01

439

Endoscopic Video Manifolds  

Microsoft Academic Search

\\u000a Postprocedural analysis of gastrointestinal (GI) endoscopic videos is a difficult task because the videos often suffer from\\u000a a large number of poor-quality frames due to the motion or out-of-focus blur, specular highlights and artefacts caused by\\u000a turbid fluid inside the GI tract. Clinically, each frame of the video is examined individually by the endoscopic expert due\\u000a to the lack of

Selen Atasoy; Diana Mateus; Joe Lallemand; Alexander Meining; Guang-Zhong Yang; Nassir Navab

2010-01-01

440

Informedia digital video library  

Microsoft Academic Search

is developing new technologies for creating full-content search and retrieval digital video libraries. Working in collaboration with WQED Pittsburgh, the project is creating a test-bed that will enable K-12 students to access, explore, and retrieve science and mathemat-ics materials from the digital video library. The library will initially contain 1,000 hours of video from the archives of project partners: WQED,

Michael Christel; Scott Stevens; Howard Wactlar

1994-01-01

441

Digitales Video Martin Knopp  

E-print Network

Digitales Video Martin Knopp Thomas Hach � #12;Technische Universität MünchenLehrstuhl für Datenverarbeitung 2 Poster ­ Was ist das? Digitales Video #12;Technische Universität MünchenLehrstuhl für Datenverarbeitung 3 Konferenzen Digitales Video #12;Technische Universität MünchenLehrstuhl für Datenverarbeitung 4

442

Digitales Video Martin Knopp  

E-print Network

Digitales Video Martin Knopp Thomas Hach � #12;Technische Universität MünchenLehrstuhl für/Dilatation ­ Open/Close 2Digitales Video #12;Technische Universität MünchenLehrstuhl für Datenverarbeitung Post Medianfilter oder Max-/Min-Filter 3 a b c d e Ausgangsbild Ergebnis Digitales Video #12;Technische Universität

443

Video Demonstration: Proportions  

NSDL National Science Digital Library

This video demonstration from Watch Know Learn will help students learning about proportions. The video will help students with some knowledge of proportions by showing examples of how to solve them. The definition of a proportion is included as well as examples of how to cross-multiply to solve proportion problems. The demonstration shows what a non-proportion problem looks like and how to solve it as well as a few examples of using the lowest common denominator to solve proportions. Flash player is required to view the video, and the running time for the video is 8:09.

2012-01-01

444

video.sonicnet  

NSDL National Science Digital Library

A music video haven, SonicNet presents ten new full-length videos each week. Users can also peruse the archive of videos (searchable by alphabetical listing or category: rock, urban, and dance), or check out the latest happenings in the music scene through Music News. And for the fans of commercial advertising, Levis, a sponsor of SonicNet, provides footage from their commercials/videos. To return to the front page of the site, simply press on the symbol located in the top left corner of the window.

1998-01-01

445

APPLIED RESEARCH IN VIDEO GAMES  

Microsoft Academic Search

Three uses of video games are described: 1. Video games as assessment and as measures of performance. 2. Video games as training and practice in cognitive and perceptual skills, biological and physiological functioning, and cooperation and teamwork. 3. Video games as entertainment. Selected studies are described for each domain. The purpose is to suggest the many possible roles for video

Jeffrey Goldstein

446

Video Behavior Profiling for Anomaly Detection Tao Xiang, Member, IEEE, and Shaogang Gong  

E-print Network

quantities of surveillance video data generated continuously by closed-circuit television (CCTV) systems. One detection. Given a 24/7 continuously recorded video or an online CCTV input, the goal of automatic behavior

Gong, Shaogang

447

VICTORIOUS : video indexing with combined tracking and object recognition for improved object understanding in scenes  

E-print Network

Automatic understanding of video content is a problem which grows in importance every day. Video understanding algorithms require accuracy, robustness, speed, and scalability. Accuracy generates user confidence in usage. ...

Xu, Yuetian

2009-01-01

448

COVICS: A covert video communications system  

NASA Astrophysics Data System (ADS)

A covert video communications system compatible with narrow band satellite use has been developed. The system communications by modulating reflected energy. This means that no energy is actively generated at the passive end of the link. Only the antenna is impedance is modulated to return the information. The recovered signal is then coherently demodulated to recover the information. The system uses microstrip antennas, operates at 10 GHz, and has a range of about 5 km. The video is slow scan and is updated every 2 seconds, and can be sent over a 2400 baud line such as is required for some satellite communications systems. A combination of discrete cosine transform and video differencing was used to achieve a high degree of video compression.

Bracht, Roger; Kuckertz, Tom

449

Building the Advanced Photon Source  

SciTech Connect

This timelapse video shows the U.S. Department of Energy's Advanced Photon Source (APS) rising from an empty field at Argonne National Laboratory to become the source of the Western Hemisphere's brightest x-rays for research. The video was compiled from still photographs taken from 1990-1996.

None

2010-01-01

450

Photogrammetric Applications of Immersive Video Cameras  

NASA Astrophysics Data System (ADS)

The paper investigates immersive videography and its application in close-range photogrammetry. Immersive video involves the capture of a live-action scene that presents a 360° field of view. It is recorded simultaneously by multiple cameras or microlenses, where the principal point of each camera is offset from the rotating axis of the device. This issue causes problems when stitching together individual frames of video separated from particular cameras, however there are ways to overcome it and applying immersive cameras in photogrammetry provides a new potential. The paper presents two applications of immersive video in photogrammetry. At first, the creation of a low-cost mobile mapping system based on Ladybug®3 and GPS device is discussed. The amount of panoramas is much too high for photogrammetric purposes as the base line between spherical panoramas is around 1 metre. More than 92 000 panoramas were recorded in one Polish region of Czarny Dunajec and the measurements from panoramas enable the user to measure the area of outdoors (adverting structures) and billboards. A new law is being created in order to limit the number of illegal advertising structures in the Polish landscape and immersive video recorded in a short period of time is a candidate for economical and flexible measurements off-site. The second approach is a generation of 3d video-based reconstructions of heritage sites based on immersive video (structure from immersive video). A mobile camera mounted on a tripod dolly was used to record the interior scene and immersive video, separated into thousands of still panoramas, was converted from video into 3d objects using Agisoft Photoscan Professional. The findings from these experiments demonstrated that immersive photogrammetry seems to be a flexible and prompt method of 3d modelling and provides promising features for mobile mapping systems.

Kwiatek, K.; Tokarczyk, R.

2014-05-01

451

A System for On-demand Video Lectures  

Microsoft Academic Search

We propose a lecture-on-demand system, which searches lec- ture videos for segments relevant to user information needs. We utilize the benefits of textbooks and audio\\/video data cor- responding to a single lecture. Our system extracts the au- dio track from a target lecture video, generates a transcrip- tion by large vocabulary continuous speech recognition, and produces a textual index. Users

Atsushi Fujiiy; Chuuou Daini Umezono

452

Embedded Video Surveillance System Based on H.264  

Microsoft Academic Search

Embedded video surveillance has become a large market as the number of installed cameras around us can show. At the same time, video compression technique has been rapidly developed in recent years. As a new generation of video coding compression standard, extensive attention has been given to H.264\\/AVC. On the other hand, because of good cost-effective and low-power consumption, DSP

Jun-Wei Gao; Ke-Bin Jia

2009-01-01

453

A System for On-demand Video Lectures  

Microsoft Academic Search

Abstract We propose a lecture-on-demand system, which searches lec- ture videos for segments,relevant to user information needs. We utilize the benefits of textbooks and audio\\/video data cor- responding to a single lecture. Our system extracts the au- dio track from a target lecture video, generates a transcrip- tion by large vocabulary continuous speech recognition, and produces,a textual index. Users can

Atsushi Fujii; Yyy Katunobu Itou; Yyy Tetsuya Ishikawa

454

Tweeting videos: coordinate live streaming and storage sharing  

Microsoft Academic Search

User generated video sharing (e.g., YouTube) and social-networked micro-blogging (e.g., Twitter) are among the most popular Internet applications in the Web 2.0 era. It is known that these two applications are now tightly coupled, with many new videos being tweeted among Twitter users. Unfortunately, video sharing sites are facing critical server bottlenecks and the surges created by Twitter followers would

Xu Cheng; Jiangchuan Liu

2010-01-01

455

Trends in Global Demonstrations of Carbon Management Technologies to Advance Coal- Based Power Generation With Carbon Capture and Storage  

NASA Astrophysics Data System (ADS)

Atmospheric CO2 concentrations increased an estimated 35% since preindustrial levels two centuries ago, reportedly due to the burning of fossil fuels combined with increased deforestation. In the U.S., energy-related activities account for 75% of anthropogenic greenhouse gas (GHG) emissions, with more than 50% from large stationary sources such as power plants and about one-third from transportation. Mitigation technologies for CO2 atmospheric stabilization based on energy and economic scenarios include coal-based power plant- carbon capture and storage (CCS), and the U.S. Department of Energy (DOE) is assessing CCS operations and supporting technologies at U.S. locations and opportunities abroad reported here. The Algerian In Salah Joint Industry Project injecting 1 million tons CO2 (MtCO2)/year into a gas field sandstone, and the Canadian Weyburn-Midale CO2 Monitoring and Storage Project injecting over 1.8 MtCO2/year into carbonate oil reservoirs are ongoing industrial-scale storage operations DOE participates in. DOE also supports mid-scale CCS demonstrations at the Australian Otway Project and CO2SINK in Germany. Enhanced oil recovery operations conducted for decades in west Texas and elsewhere have provided the industrial experience to build on, and early pilots such as Frio-I Texas in 2004 have spearheaded technology deployment. While injecting 1,600 tons of CO2 into a saline sandstone at Frio, time-lapse borehole and surface seismic detected P-wave velocity decreases and reflection amplitude changes resulting from the replacement of brine with CO2 in the reservoir. Just two of many cutting-edge technologies tested at Frio, these and others are now deployed by U.S. researchers with international teams to evaluate reservoir injectivity, capacity, and integrity, as well as to assess CO2 spatial distribution, trapping, and unlikely leakage. Time-lapse Vertical Seismic Profiling at Otway and microseismic at In Salah and Otway, monitor injection and reservoir conditions with geophysics. Borehole-based technologies include a novel geochemical two-phase reservoir sampler deployed at Otway, and thermal-based measurements at CO2SINK for coupled hydrologic-geochemical reservoir analyses. Seismic, geomechanical, hydrologic, geochemical, and core studies are used in a multidisciplinary approach to assess CO2 trapping and reservoir integrity at In Salah. With estimated lifetime storage of 17 MtCO2 at In Salah, this and other CCS demonstrations provide opportunities to gain commercial experience for advancing coal-based power generation-CCS for carbon management.

Cohen, K. K.; Plasynski, S.; Feeley, T. J.

2008-05-01

456

Automatic Association of Chats and Video Tracks for Activity Learning and Recognition in Aerial Video Surveillance  

PubMed Central

We describe two advanced video analysis techniques, including video-indexed by voice annotations (VIVA) and multi-media indexing and explorer (MINER). VIVA utilizes analyst call-outs (ACOs) in the form of chat messages (voice-to-text) to associate labels with video target tracks, to designate spatial-temporal activity boundaries and to augment video tracking in challenging scenarios. Challenging scenarios include low-resolution sensors, moving targets and target trajectories obscured by natural and man-made clutter. MINER includes: (1) a fusion of graphical track and text data using probabilistic methods; (2) an activity pattern learning framework to support querying an index of activities of interest (AOIs) and targets of interest (TOIs) by movement type and geolocation; and (3) a user interface to support streaming multi-intelligence data processing. We also present an activity pattern learning framework that uses the multi-source associated data as training to index a large archive of full-motion videos (FMV). VIVA and MINER examples are demonstrated for wide aerial/overhead imagery over common data sets affording an improvement in tracking from video data alone, leading to 84% detection with modest misdetection/false alarm results due to the complexity of the scenario. The novel use of ACOs and chat messages in video tracking paves the way for user interaction, correction and preparation of situation awareness reports. PMID:25340453

Hammoud, Riad I.; Sahin, Cem S.; Blasch, Erik P.; Rhodes, Bradley J.; Wang, Tao

2014-01-01

457

Automatic association of chats and video tracks for activity learning and recognition in aerial video surveillance.  

PubMed

We describe two advanced video analysis techniques, including video-indexed by voice annotations (VIVA) and multi-media indexing and explorer (MINER). VIVA utilizes analyst call-outs (ACOs) in the form of chat messages (voice-to-text) to associate labels with video target tracks, to designate spatial-temporal activity boundaries and to augment video tracking in challenging scenarios. Challenging scenarios include low-resolution sensors, moving targets and target trajectories obscured by natural and man-made clutter. MINER includes: (1) a fusion of graphical track and text data using probabilistic methods; (2) an activity pattern learning framework to support querying an index of activities of interest (AOIs) and targets of interest (TOIs) by movement type and geolocation; and (3) a user interface to support streaming multi-intelligence data processing. We also present an activity pattern learning framework that uses the multi-source associated data as training to index a large archive of full-motion videos (FMV). VIVA and MINER examples are demonstrated for wide aerial/overhead imagery over common data sets affording an improvement in tracking from video data alone, leading to 84% detection with modest misdetection/false alarm results due to the complexity of the scenario. The novel use of ACOs and chat Sensors 2014, 14 19844 messages in video tracking paves the way for user interaction, correction and preparation of situation awareness reports. PMID:25340453

Hammoud, Riad I; Sahin, Cem S; Blasch, Erik P; Rhodes, Bradley J; Wang, Tao

2014-01-01

458

Moodle: Embedding Video Embedding a video in its own player using your own video files  

E-print Network

Moodle: Embedding Video Embedding a video in its own player � using your own video files Moodle has an inbuilt video player called Flowplayer. Anywhere that Moodle's TinyMCE text editor is available, it is possible to embed a video e.g. in a label, a page, a course topic summary and a quiz description. Using

Brierley, Andrew

459

Ring Polymers Video  

NSDL National Science Digital Library

This video explains an activity related to ring polymers. The topic is covered in relation to nanotechnology and requires background knowledge in eight grade science. The 1:30 minute video details the materials needed and steps required to complete this lesson. Visitors must complete a quick and free registration to access the materials.

2014-09-08

460

First Video Game  

SciTech Connect

Fifty years ago, before either arcades or home video games, visitors waited in line at Brookhaven National Laboratory to play Tennis for Two, an electronic tennis game that is unquestionably a forerunner of the modern video game. Two people played the ele

Peter Takacs

2008-10-21