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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

Advanced Transportation Video  

NSDL National Science Digital Library

This video provides an overview of the Center for Transportation Technologies and Systems and its research on alternative fuel vehicles and why they have less impact than current fossil fuel-burning cars on the environment.

National Renewable Energy Laboratory (NREL)

8

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

9

Automatic generation of personalized music sports video  

Microsoft Academic Search

In this paper, we propose a novel automatic approach for personalized music sports video generation. Two research challenges, semantic sports video content selection and automatic video composition, are addressed. For the first challenge, we propose to use multi-modal (audio, video and text) feature analysis and alignment to detect the semantic of events in sports video. For the second challenge, we

Jinjun Wang; Changsheng Xu; Engsiong Chng; Ling-Yu Duan; Kongwah Wan; Qi Tian

2005-01-01

10

Naval threat countermeasure simulator and the IR_CRUISE_missiles models for the generation of infrared (IR) videos of maritime targets and background for input into advanced imaging IR seekers  

NASA Astrophysics Data System (ADS)

A new hardware-in-the-loop modeling technique was developed at the US Naval Research Laboratory (NRL) for the evaluation of IR countermeasures against advanced IR imaging anti-ship cruise missiles. The research efforts involved the creation of tools to generate accurate IR imagery and synthesize video to inject in to real-world threat simulators. A validation study was conducted to verify the accuracy and limitations of the techniques that were developed.

Taczak, Thomas M.; Dries, John W.; Gover, Robert E.; Snapp, Mary Ann; Williams, Elmer F.; Cahill, Colin P.

2002-07-01

11

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

12

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

13

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

14

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

15

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

16

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

17

Interactive mosaic generation for video navigation  

Microsoft Academic Search

Navigation through large multimedia collections that include videos and images still remains a hard problem. In this paper, we introduce a novel method to visualize and navigate through the collection by creating a mosaic image that represents the compilation. This image is generated by a labeling-based layout algorithm using various sizes of sample tile images from the collection. Each tile

Kihwan Kim; Irfan A. Essa; Gregory D. Abowd

2006-01-01

18

Multiple Generations on Video Tape Recorders.  

ERIC Educational Resources Information Center

Helical scan video tape recorders were tested for their dubbing characteristics in order to make selection data available to media personnel. The equipment, two recorders of each type tested, was submitted by the manufacturers. The test was designed to produce quality evaluations for three generations of a single tape, thereby encompassing all…

Wiens, Jacob H.

19

The Advanced Helical Generator  

SciTech Connect

A high explosive pulsed power (HEPP) generator called the Advanced Helical Generator (AHG) has been designed, built, and successfully tested. The AHG incorporates design principles of voltage and current management to obtain a high current and energy gain. Its design was facilitated by the use of modern modeling tools as well as high precision manufacture. The result was a first-shot success. The AHG delivered 16 Mega-Amperes of current and 11 Mega-Joules of energy to a quasi-static 80 nH inductive load. A current gain of 154 times was obtained with a peak exponential rise time of 20 {micro}s. We will describe in detail the design and testing of the AHG.

Reisman, D B; Javedani, J B; Ellsworth, G F; Kuklo, R M; Goerz, D A; White, A D; Tallerico, L J; Gidding, D A; Murphy, M J; Chase, J B

2009-10-26

20

Video coding: Death is not near  

Microsoft Academic Search

Efficient compression and network compatibility are two challenging tasks for video coding. This paper provides an overview of advanced techniques for the next generation video coding including high efficiency video coding, content-based video coding, distributed video coding, scalable video coding and multiple description video coding. Keywords—video compression, video transmission. I. INTRODUCTION With the popularity of digital video applications, efficiently representing

Meilin Yang; Ye He; Fengqing Zhu; Marc Bosch; Mary Comer; Edward J. Delp

2011-01-01

21

ADVANCED STEAM GENERATORS  

SciTech Connect

Concerns about climate change have encouraged significant interest in concepts for ultra-low or ''zero''-emissions power generation systems. In some proposed concepts, nitrogen is removed from the combustion air and replaced with another diluent such as carbon dioxide or steam. In this way, formation of nitrogen oxides is prevented, and the exhaust stream can be separated into concentrated CO{sub 2} and steam or water streams. The concentrated CO{sub 2} stream could then serve as input to a CO{sub 2} sequestration process or utilized in some other way. Some of these concepts are illustrated in Figure 1. This project is an investigation of one approach to ''zero'' emission power generation. Oxy-fuel combustion is used with steam as diluent in a power cycle proposed by Clean Energy Systems, Inc. (CES) [1,2]. In oxy-fuel combustion, air separation is used to produce nearly pure oxygen for combustion. In this particular concept, the combustion temperatures are moderated by steam as a diluent. An advantage of this technique is that water in the product stream can be condensed with relative ease, leaving a pure CO{sub 2} stream suitable for sequestration. Because most of the atmospheric nitrogen has been separated from the oxidant, the potential to form any NOx pollutant is very small. Trace quantities of any minor pollutants species that do form are captured with the CO{sub 2} or can be readily removed from the condensate. The result is a nearly zero-emission power plant. A sketch of the turbine system proposed by CES is shown in Figure 2. NETL is working with CES to develop a reheat combustor for this application. The reheat combustion application is unusual even among oxy-fuel combustion applications. Most often, oxy-fuel combustion is carried out with the intent of producing very high temperatures for heat transfer to a product. In the reheat case, incoming steam is mixed with the oxygen and natural gas fuel to control the temperature of the output stream to about 1480 K. A potential concern is the possibility of quenching non-equilibrium levels of CO or unburned fuel in the mixing process. Inadequate residence times in the combustor and/or slow kinetics could possibly result in unacceptably high emissions. Thus, the reheat combustor design must balance the need for minimal excess oxygen with the need to oxidize the CO. This paper will describe the progress made to date in the design, fabrication, and simulation of a reheat combustor for an advanced steam generator system, and discuss planned experimental testing to be conducted in conjunction with NASA Glenn Research Center-Plumb Brook Station.

Richards, Geo. A.; Casleton, Kent H.; Lewis, Robie E.; Rogers, William A. (U.S. DOE National Energy Technology Laboratory); Woike, Mark R.; Willis; Brian P. (NASA Glenn Research Center)

2001-11-06

22

Generating Video Textures by PPCA and Gaussian Process Dynamical Model  

NASA Astrophysics Data System (ADS)

Video texture is a new type of medium which can provide a continuous, infinitely varying stream of video images from a recorded video clip. It can be synthesized by rearranging the order of frames based on the similarities between all pairs of frames. In this paper, we propose a new method for generating video textures by implementing probabilistic principal components analysis (PPCA) and Gaussian Process Dynamical model (GPDM). Compared to the original video texture technique, video texture synthesized by PPCA and GPDM has the following advantages: it might generate new video frames that have never existed in the input video clip before; the problem of "dead-end" is totally avoided; it could also provide video textures that are more robust to noise.

Fan, Wentao; Bouguila, Nizar

23

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

24

Flexible generation of video summaries from layered video bit-streams  

Microsoft Academic Search

The work presented in this paper introduces a method for efficient adaptability of video summaries to spatial require- ments defined by display size, user's needs and channel limitations. By utilising compressed domain features and an efficient contour evolution algorithm, a scale space of tem- poral video descriptors is generated, enabling dynamic video summarisation in real-time. The summary is laid out

Janko Calic; Marta Mrak; Ahmet M. Kondoz

2008-01-01

25

Automatic generation of pictorial transcripts of video programs  

Microsoft Academic Search

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

Behzad Shahraray; David C. Gibbon

1995-01-01

26

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

27

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

28

Using GPU-generated virtual video stream for multi-sensor system  

NASA Astrophysics Data System (ADS)

Security and intelligence services are increasingly turning toward multi-sensor video surveillance which requires human ability to successfully fuse and comprehend the information provided by videos. A training system using the same front end as real multi-sensor system for users can significantly increase such human ability. The training system always needs scenarios replicating stressful situations which are videotaped in advance and played later. This not only puts a limitation on the training scenarios but also brings a high cost. This paper introduces a new framework, virtual video capture device for such training system. Using the latest graphics processing units (GPUs) technology, multiple video streams composed of computer graphics (CG) are generated on one high-end PC and ublished to a video stream server. Thus users can be trained using both real video streams and virtual video streams on one system. It also enables the training system to use real video streams incorporating augmented reality to improve situation awareness of the human.

Liao, Dezhi; Hennessey, Brian

2006-05-01

29

Robust video watermarking scheme using computer generated holographic technique  

NASA Astrophysics Data System (ADS)

A novel blind video watermarking scheme offering a low computational complexity is presented in which the computer generated holograms are used as the watermarks. In the scheme, the original video is divided into nonoverlapping groups of pictures (GOPs). A quantization method is used to insert the mark hologram into the low frequency wavelet coefficients of every GOP. The extraction procedure does not need the original video. Experimental results demonstrate that the presented scheme is transparent and robust to a variety of attacks, including compression, noise addition, filtering, occlusion, cropping and temporal attacks, etc. One of the most important advantages of the suggested method is its simplicity and practicality.

Li, Jianzhong

2013-06-01

30

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

31

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

32

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

33

Video coding for next-generation surveillance systems  

NASA Astrophysics Data System (ADS)

Video is used as recording media in surveillance system and also more frequently by the Swedish Police Force. Methods for analyzing video using an image processing system have recently been introduced at the Swedish National Laboratory of Forensic Science, and new methods are in focus in a research project at Linkoping University, Image Coding Group. The accuracy of the result of those forensic investigations often depends on the quality of the video recordings, and one of the major problems when analyzing videos from crime scenes is the poor quality of the recordings. Enhancing poor image quality might add manipulative or subjective effects and does not seem to be the right way of getting reliable analysis results. The surveillance system in use today is mainly based on video techniques, VHS or S-VHS, and the weakest link is the video cassette recorder, (VCR). Multiplexers for selecting one of many camera outputs for recording is another problem as it often filters the video signal, and recording is limited to only one of the available cameras connected to the VCR. A way to get around the problem of poor recording is to simultaneously record all camera outputs digitally. It is also very important to build such a system bearing in mind that image processing analysis methods becomes more important as a complement to the human eye. Using one or more cameras gives a large amount of data, and the need for data compression is more than obvious. Crime scenes often involve persons or moving objects, and the available coding techniques are more or less useful. Our goal is to propose a possible system, being the best compromise with respect to what needs to be recorded, movements in the recorded scene, loss of information and resolution etc., to secure the efficient recording of the crime and enable forensic analysis. The preventative effective of having a well functioning surveillance system and well established image analysis methods is not to be neglected. Aspects of this next generation of digital surveillance systems are discussed in this paper.

Klasen, Lena M.; Fahlander, Olov

1997-02-01

34

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

35

Advanced real time fire detection in video surveillance system  

Microsoft Academic Search

Development of automatic and intelligent video surveillance systems has been the core trend in the security and guard service industry. This paper presents a simple and effective algorithm for detecting the fire calamity event automatically in the monitoring area via real time video contents analysis. By observing and utilizing features of fire event, a fast and exact detection process is

Chin-lun Lai; Jie-ci Yang

2008-01-01

36

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

37

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

38

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

39

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

40

Improved side information generation with iterative decoding and frame interpolation for Distributed Video Coding  

Microsoft Academic Search

Distributed Video Coding (DVC) is a new paradigm in video coding, which is receiving a lot of interests nowadays. Side Information (SI) generation is a key function in the DVC decoder, and plays a key-role in determining the performance of the codec. This paper proposes an improved side information generation scheme, which exploits both spatial and temporal correlations in the

Shuiming Ye; Mourad Ouaret; Frédéric Dufaux; Touradj Ebrahimi

2008-01-01

41

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

42

INFLUENCE OF SHOOTING CONDITIONS, RE-ENCODING AND VIEWING CONDITIONS ON THE PERCEIVED QUALITY OF USER-GENERATED VIDEOS  

E-print Network

OF USER-GENERATED VIDEOS Y. Pitrey , P. Hummelbrunner , B. Kitzinger , S. Buchinger , M. Barkowsky+ , P + Polytech'Nantes, LUNAM Univ. de Nantes, IRCCyN IVC ­ UMR CNRS 6597, FRANCE ABSTRACT User-generated videos of these videos is quite different from the tra- ditional professionally designed videos. Consumer-range cameras

Paris-Sud XI, Université de

43

Advanced Thermoelectric Materials for Radioisotope Thermoelectric Generators  

NASA Technical Reports Server (NTRS)

This slide presentation reviews the progress and processes involved in creating new and advanced thermoelectric materials to be used in the design of new radioiootope thermoelectric generators (RTGs). In a program with Department of Energy, NASA is working to develop the next generation of RTGs, that will provide significant benefits for deep space missions that NASA will perform. These RTG's are planned to be capable of delivering up to 17% system efficiency and over 12 W/kg specific power. The thermoelectric materials being developed are an important step in this process.

Caillat, Thierry; Hunag, C.-K.; Cheng, S.; Chi, S. C.; Gogna, P.; Paik, J.; Ravi, V.; Firdosy, S.; Ewell, R.

2008-01-01

44

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

45

Multipriority video transmission for third-generation wireless communication systems  

Microsoft Academic Search

This paper presents a robust dual-priority video partitioning method suitable for twin-class unequal protected video transmission over wireless channels. The partitioning is based on a separation of the variable-length (VL) coded discrete cosine transform (DCT) coefficients within each block. The scheme is suitable for constant bit-rate transmission (CBR), where the fraction of bits assigned to each of the two partitions

HAMID GHARAVI; SIAVASH M. ALAMOUTI

1999-01-01

46

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

47

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

48

Tracking of Generic Objects for Video Object Generation  

Microsoft Academic Search

A tracking technique for creating generic video objects is presented. It assumes that the object in the initial image has been previously defined by an object partition. The object tracking relies on the concept of partition projection. The projection of a partition accommodates the previous partition information into the current image. The object partition is re-segmented so a texture partition

Ferran Marqués; Joan Llach

1998-01-01

49

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

50

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

51

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

PubMed Central

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 three academic medical centres in Boston. Participants Convenience sample of 200 older people (?65 years) living in the community with previously scheduled appointments at one of the clinics. Mean age was 75 and 58% were women. Intervention Verbal narrative alone (n=106) or with a video decision support tool (n=94). Main outcome measures Preferred goal of care: life prolonging care (cardiopulmonary resuscitation, mechanical ventilation), limited care (admission to hospital, antibiotics, but not cardiopulmonary resuscitation), or comfort care (treatment only to relieve symptoms). Preferences after six weeks. The principal category for analysis was the difference in proportions of participants in each group who preferred comfort care. Results Among participants receiving the verbal narrative alone, 68 (64%) chose comfort care, 20 (19%) chose limited care, 15 (14%) chose life prolonging care, and three (3%) were uncertain. In the video group, 81 (86%) chose comfort care, eight (9%) chose limited care, four (4%) chose life prolonging care, and one (1%) was uncertain (?2=13.0, df=3, P=0.003). Among all participants the factors associated with a greater likelihood of opting for comfort care were being a college graduate or higher, good or better health status, greater health literacy, white race, and randomisation to the video arm. In multivariable analysis, participants in the video group were more likely to prefer comfort care than those in the verbal group (adjusted odds ratio 3.9, 95% confidence interval 1.8 to 8.6). Participants were re-interviewed after six weeks. Among the 94/106 (89%) participants re-interviewed in the verbal group, 27 (29%) changed their preferences (?=0.35). Among the 84/94 (89%) participants re-interviewed in the video group, five (6%) changed their preferences (?=0.79) (P<0.001 for difference). Conclusion Older people who view a video depiction of a patient with advanced dementia after hearing a verbal description of the condition are more likely to opt for comfort as their goal of care compared with those who solely listen to a verbal description. They also have more stable preferences over time. Trial registration Clinicaltrials.gov NCT00704886. PMID:19477893

2009-01-01

52

Effects of Generative Video on Students' Scientific Problem Posing. Draft.  

ERIC Educational Resources Information Center

A central premise of the discovery-learning and progressive education movements was that the child's own questions are the most appropriate starting point for instruction. Recent advances present new opportunities for discovery-oriented learning. This project has been attempting to create a classroom environment which affords students the…

Hickey, Daniel T.; Petrosino, Anthony

53

Efficient lossless compression of 4-D medical images based on the advanced video coding scheme.  

PubMed

This paper presents an efficient lossless compression method for 4-D medical images based on the advanced video coding scheme (H.264/AVC). The proposed method efficiently reduces data redundancies in all four dimensions by recursively applying multiframe motion compensation. Performance evaluations on real 4-D medical images of varying modalities including functional magnetic resonance show an improvement in compression efficiency of up to three times that of other state-of-the-art compression methods such as 3D-JPEG2000. PMID:18632324

Sanchez, Victor; Nasiopoulos, Panos; Abugharbieh, Rafeef

2008-07-01

54

Fuzzy control based fusion scheme for side information generation in multiview distributed video coding systems  

Microsoft Academic Search

In multiview distributed video coding (DVC) systems, both temporal and inter-view correlations can be exploited through a fusion scheme to generate a better side information (SI) in order to improve the rate distortion (R-D) performance. However, many fusion methods available can not always achieve considerable performance for the influence of some subjective factors. In this paper, we present a new

Cheng Guo; Haoqian Wang; Xiaodong Liu

2010-01-01

55

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

56

Integrated homeland security system with passive thermal imaging and advanced video analytics  

NASA Astrophysics Data System (ADS)

A complete detection, management, and control security system is absolutely essential to preempting criminal and terrorist assaults on key assets and critical infrastructure. According to Tom Ridge, former Secretary of the US Department of Homeland Security, "Voluntary efforts alone are not sufficient to provide the level of assurance Americans deserve and they must take steps to improve security." Further, it is expected that Congress will mandate private sector investment of over $20 billion in infrastructure protection between 2007 and 2015, which is incremental to funds currently being allocated to key sites by the department of Homeland Security. Nearly 500,000 individual sites have been identified by the US Department of Homeland Security as critical infrastructure sites that would suffer severe and extensive damage if a security breach should occur. In fact, one major breach in any of 7,000 critical infrastructure facilities threatens more than 10,000 people. And one major breach in any of 123 facilities-identified as "most critical" among the 500,000-threatens more than 1,000,000 people. Current visible, nightvision or near infrared imaging technology alone has limited foul-weather viewing capability, poor nighttime performance, and limited nighttime range. And many systems today yield excessive false alarms, are managed by fatigued operators, are unable to manage the voluminous data captured, or lack the ability to pinpoint where an intrusion occurred. In our 2006 paper, "Critical Infrastructure Security Confidence Through Automated Thermal Imaging", we showed how a highly effective security solution can be developed by integrating what are now available "next-generation technologies" which include: Thermal imaging for the highly effective detection of intruders in the dark of night and in challenging weather conditions at the sensor imaging level - we refer to this as the passive thermal sensor level detection building block Automated software detection for creating initial alerts - we refer to this as software level detection, the next level building block Immersive 3D visual assessment for situational awareness and to manage the reaction process - we refer to this as automated intelligent situational awareness, a third building block Wide area command and control capabilities to allow control from a remote location - we refer to this as the management and process control building block integrating together the lower level building elements. In addition, this paper describes three live installations of complete, total systems that incorporate visible and thermal cameras as well as advanced video analytics. Discussion of both system elements and design is extensive.

Francisco, Glen; Tillman, Jennifer; Hanna, Keith; Heubusch, Jeff; Ayers, Robert

2007-04-01

57

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

NASA Astrophysics Data System (ADS)

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 applicable to real-time telepresence in the situation where the real world to be seen is far from an observation site, because the time delay from the change of user"s viewing direction to the change of displayed image is small and does not depend on the actual distance between both sites. Moreover, multiple users can look around from a single viewpoint in a visualized dynamic real world in different directions at the same time. In experiments, we have proved that the proposed system is useful for internet telepresence.

Morita, Shinji; Yamazawa, Kazumasa; Yokoya, Naokazu

2003-01-01

58

Thermal Model Predictions of Advanced Stirling Radioisotope Generator Performance  

NASA Technical Reports Server (NTRS)

This presentation describes the capabilities of three-dimensional thermal power model of advanced stirling radioisotope generator (ASRG). The performance of the ASRG is presented for different scenario, such as Venus flyby with or without the auxiliary cooling system.

Wang, Xiao-Yen J.; Fabanich, William Anthony; Schmitz, Paul C.

2014-01-01

59

Advancing-layers method for generation of unstructured viscous grids  

NASA Technical Reports Server (NTRS)

A novel approach for generating highly stretched grids which is based on a modified advancing-front technique and benefits from the generality, flexibility, and grid quality of the conventional advancing-front-based Euler grid generators is presented. The method is self-sufficient for the insertion of grid points in the boundary layer and beyond. Since it is based on a totally unstructured grid strategy, the method alleviates the difficulties stemming from the structural limitations of the prismatic techniques.

Pirzadeh, Shahyar

1993-01-01

60

An improved block matching and prediction algorithm for multi-view video with distributed video codec  

Microsoft Academic Search

With the advance of multi-view video codec (MVC) technology, the multimedia platform can display videos of different views. The distributed video coder (DVC) that adopts the Wynzer-Ziv (WZ) codec can shift encoding complexity to decoder under the MVC framework, denoted as multi-view DVC (MDVC), for possible low-complexity encoder applications. For side information (SI) generation, the intra- and inter-view video correlations

Ching-Hua Chen; Shih-Chieh Lee; Jiann-Jone Chen

2011-01-01

61

Unstructured viscous grid generation by advancing-layers method  

NASA Technical Reports Server (NTRS)

A new method of generating unstructured triangular/tetrahedral grids with high-aspect-ratio cells is proposed. The method is based on new grid-marching strategy referred to as 'advancing-layers' for construction of highly stretched cells in the boundary layer and the conventional advancing-front technique for generation of regular, equilateral cells in the inviscid-flow region. Unlike the existing semi-structured viscous grid generation techniques, the new procedure relies on a totally unstructured advancing-front grid strategy resulting in a substantially enhanced grid flexibility and efficiency. The method is conceptually simple but powerful, capable of producing high quality viscous grids for complex configurations with ease. A number of two-dimensional, triangular grids are presented to demonstrate the methodology. The basic elements of the method, however, have been primarily designed with three-dimensional problems in mind, making it extendible for tetrahedral, viscous grid generation.

Pirzadeh, Shahyar

1993-01-01

62

Unstructured viscous grid generation by advancing-front method  

NASA Technical Reports Server (NTRS)

A new method of generating unstructured triangular/tetrahedral grids with high-aspect-ratio cells is proposed. The method is based on new grid-marching strategy referred to as 'advancing-layers' for construction of highly stretched cells in the boundary layer and the conventional advancing-front technique for generation of regular, equilateral cells in the inviscid-flow region. Unlike the existing semi-structured viscous grid generation techniques, the new procedure relies on a totally unstructured advancing-front grid strategy resulting in a substantially enhanced grid flexibility and efficiency. The method is conceptually simple but powerful, capable of producing high quality viscous grids for complex configurations with ease. A number of two-dimensional, triangular grids are presented to demonstrate the methodology. The basic elements of the method, however, have been primarily designed with three-dimensional problems in mind, making it extendible for tetrahedral, viscous grid generation.

Pirzadeh, Shahyar

1993-01-01

63

Advanced target concepts for RIB generation  

SciTech Connect

In this report, we describe highly permeable composite target matrices that simultaneously incorporate the short diffusion lengths, high permeabilities, and heat removal properties necessary to effect maximum diffusion release rates of short-lived, radioactive species as required for efficient radioactive ion beam (RIB) generation in nuclear physics and astrophysics research programs. The RIB species are generated by either fusion or fission nuclear reactions between high energy {sup 1}H, {sup 2}H, {sup 3}He or {sup 4}He ion beams and specific nuclei which make up the target material. The target materials may be used directly as small diameter particulates coated or uncoated with Re or Ir to minimize adsorption following diffusion release and eliminate sintering of the particulates at elevated temperatures; plated onto both sides of thin disks of C, for example; or plated, in thin layers, onto low density, Ir or Re coated carbon-bonded-carbon-fiber (CBCF) or reticulated-carbon-fiber (RCF) to form sponge-like composite target matrices; or in other cases, where applicable, the target material of interest can be grown in crystalline fibrous form and fabricated in woven mats of the target material to form a highly permeable fibrous structure.

Alton, G.D.

1996-12-01

64

Video Feedback  

ERIC Educational Resources Information Center

Author states that participation in TV becomes video feedback to teachers and parents. If radical approaches to TV become the norm, video will be the content of a new awareness that is being generated by this new visual culture. (Author)

Jonassen, David H.

1974-01-01

65

Advanced DTM generation from lidar data  

E-print Network

The introduction of laser scanning has triggered off 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 für Photogrammetrie und Fernerkundung, I.P.F.) at Vienna University of Technology. First, a technique for the calibration of laser scanner data is introduced. The (height) discrepancies between overlapping strips, as well as control points with known co-ordinates are utilised for a simultaneous adjustment and transformation of all strips into a state wide co-ordinate system. The next step of LIDAR data processing are the filtering (elimination of vegetation and building points, generally off-terrain points) and the interpolation of the (bald earth) surface. The method, developed at the I.P.F., distinguishes itself in the integration of filtering and terrain interpolation in one process (advantage: even in steep terrain ground points are classified correctly) as well as in the application of data pyramids (advantage: even in very dense forest areas and on large buildings, off-terrain points are eliminated). In order to generate a terrain model with high geo-morphological quality, methods are required for deriving structural line information (e.g. break lines) from laser scanner data. The first method which will be presented, proceeds by a simulation of rain fall over the preliminary DTM (water flow analysis). This yields an identification of the pits with their pit base and the outflow (overflow) point.

K. Kraus; N. Pfeifer

2001-01-01

66

Full-color autostereoscopic video display system using computer-generated synthetic phase holograms  

NASA Astrophysics Data System (ADS)

A full-color auto-stereoscopic video display system has been introduced and developed using only a single phase-only spatial light modulator, a simple projection lens module, and three laser diode sources with the wavelengths of 635nm (red), 532nm (green), and 473nm (blue). Full-color stereoscopic input video frames are separated by each red, green, and blue component with respect to each stereo eye view for a 3D image frame. Each hologram is then optimized by a modified iterative Fresnel transform algorithm method, for the reconstruction of each gray-level quantized stereo image without color dispersion. To solve the color dispersion problem we applied scaling constraints and phase-leveling techniques for each hologram. Then the optimized holograms are synthesized with direction-multiplexed holograms and modulated by a single phase-type spatial light modulator. The modulated signals are Fourier-transformed by an achromatic lens and redirected to each viewer's eye for the reconstruction of the composed full-color auto-stereoscopic 3D display. Experimentally, we demonstrated that the designed computer-generated holograms were able to generate full-color stereoscopic 3D video images without glasses.

Choi, Kyongsik; Kim, Hwi; Lee, Byoungho

2005-03-01

67

Three-dimensional hybrid grid generation using advancing front techniques  

NASA Technical Reports Server (NTRS)

A new 3-dimensional hybrid grid generation technique has been developed, based on ideas of advancing fronts for both structured and unstructured grids. In this approach, structured grids are first generate independently around individual components of the geometry. Fronts are initialized on these structure grids, and advanced outward so that new cells are extracted directly from the structured grids. Employing typical advancing front techniques, cells are rejected if they intersect the existing front or fail other criteria When no more viable structured cells exist further cells are advanced in an unstructured manner to close off the overall domain, resulting in a grid of 'hybrid' form. There are two primary advantages to the hybrid formulation. First, generating blocks with limited regard to topology eliminates the bottleneck encountered when a multiple block system is used to fully encapsulate a domain. Individual blocks may be generated free of external constraints, which will significantly reduce the generation time. Secondly, grid points near the body (presumably with high aspect ratio) will still maintain a structured (non-triangular or tetrahedral) character, thereby maximizing grid quality and solution accuracy near the surface.

Steinbrenner, John P.; Noack, Ralph W.

1995-01-01

68

Development of advanced generator of singlet oxygen for a COIL  

NASA Astrophysics Data System (ADS)

The generator of singlet oxygen (SOG) remains still a challenge for a chemical oxygen-iodine laser (COIL). Hitherto, only chemical generators based on the gas-liquid reaction system (chlorine-basic hydrogen peroxide) can supply singlet oxygen, O II(1?), in enough high yields and at pressures to maintain operation of the high power supersonic COIL facilities. Employing conventional generators of jet-type or rotating disc-type makes often problems resulting mainly from liquid droplets entrained by an O II (1?) stream into the laser cavity, and a limited scalability of these generators. Advanced generator concepts investigated currently are based on two different approaches: (i)O II(1?) generation by the electrical discharge in various configurations, eliminating thus a liquid chemistry, and (ii) O II(1?) generation by the conventional chemistry in novel configurations offering the SOG efficiency increase and eliminating drawbacks of existing devices. One of the advanced concepts of chemical generator - a spray SOG with centrifugal separation of gasliquid phases - has been proposed and investigated in our laboratory. In this paper we present a description of the generator principle, some essential results of theoretical estimations, and interim experimental results obtained with the spray SOG.

Kodymová, Jarmila; Špalek, Otomar; Jirásek, Vít; ?enský, Miroslav; Hrubý, Jan

2006-05-01

69

The design of an advanced BFB steam generator for biomass  

SciTech Connect

Current market conditions demand that industrial power plants provide fuel flexibility, efficient power generation, and reduced air emissions. ABB Canada has designed and supplied an innovative bubbling fluid bed (BFB) boiler to burn wood waste and sludge while providing high pressure steam for power generation and process requirements within a pulp mill. This paper will review the advanced features of the boiler design and discuss the boiler island layout. The combustion process and equipment selection will be explained.

Douglas, M.A.; Morrison, S.A. [ABB Power Generation, Gloucester, Ontario (Canada)

1997-12-31

70

Design features of Advanced Power Reactor (APR) 1400 steam generator  

Microsoft Academic Search

Advanced Power Reactor 1400 (APR 1400) which is to achieve the improvement of the safety and economical efficiency has been developed by Korea Hydro and Nuclear Power Co., Ltd. (KHNP) with the support from industries and research institutes. The steam generator for APR 1400 is an evolutionary type from System 80{sup +}, which is the recirculating U-tube heat exchanger with

Tae-Jung Park; Jun-Soo Park; Moo-Yong Kim

2004-01-01

71

Carpet Specifiers Guide. Ultron, Advanced Generation Nylon Carpet Fiber.  

ERIC Educational Resources Information Center

The purpose of this guide is to assist specifiers in properly specifying carpet made of Monsanto Ultron advanced generation nylon fiber. The guide describes a variety of conditions that should be considered in arriving at the proper selection and provides reference information and data, ranging from varying regulatory requirements, performance and…

Monsanto Textiles Co., Atlanta, GA.

72

Imaging morphodynamics of human blood cells in vivo with video-rate third harmonic generation microscopy.  

PubMed

With a video-rate third harmonic generation (THG) microscopy system, we imaged the micro-circulation beneath the human skin without labeling. Not only the speed of circulation but also the morpho-hydrodynamics of blood cells can be analyzed. Lacking of nuclei, red blood cells (RBCs) shows typical parachute-like and hollow-core morphology under THG microscopy. Quite different from RBCs, every now and then, round and granule rich blood cells with strong THG contrast appear in circulation. The corresponding volume densities in blood, evaluated from their frequencies of appearance and the velocity of circulation, fall within the physiological range of human white blood cell counts. PMID:23162724

Chen, Chien-Kuo; Liu, Tzu-Ming

2012-11-01

73

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

74

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

75

Block boundary matching algorithm for generating side information in distributed video codec  

NASA Astrophysics Data System (ADS)

Distributed video codec (DVC) has been developed to construct a simple encoder that utilizes information theory for distributed sources in the circumstance of mobile multimedia communication. In the DVC codec, an efficient algorithm to generate side information (SI) is one of the most important techniques to improve the coding performance. We propose a scheme to increase the quality of SI frame, where the proposed scheme consists of three steps. In the first step, SI frame is constructed by motion estimation and motion compensation in the DVC decoder. Then, in the second step, the blocks in the temporary SI frame are classified into reliable or unreliable ones. The unreliable blocks are updated by block boundary matching algorithm in the third step. Simulation results show that the proposed algorithm outperforms the conventional methods significantly. In addition, the proposed scheme can be combined with the conventional schemes generating SI frame to increase the coding performance of the DVC codec.

Choi, Kwang-Hyun; Lee, Jae-Yung; Jeon, Byeung-Woo; Han, Jong-Ki

2013-10-01

76

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

77

Optimized video decoder architecture for TMS320C64x DSP generation  

NASA Astrophysics Data System (ADS)

The TMS320C64x DSP is a generation of high-speed DSPs with a rich instruction set and an efficient memory system for multimedia processing. Digital video decoding is one of the key applications in multimedia processing. It is a computationally intensive application, which requires high bandwidth to external memory and an efficient DMA engine. Reference models for video decoders typically follow a simple data flow that operates sequentially on one macroblock (MB) at a time. This structure leads to inefficiencies in real-time implementations including less than optimal utilization of program caches and DMA bandwidth. These issues become more significant with high-performance devices like the C64x DSP because the CPU efficiency and high-clock rate allow the core processing to occur much faster than on other processors. At the same time, the bandwidth to external memory has not increased at the same rate as the processing performance. This can lead the performance bottleneck to be I/O bandwidth instead of processing unless the system data flow is carefully designed. This paper describes an optimized flow for MPEG-2 decoding, which processes multiple blocks at a time to obtain optimum cache performance and DMA bandwidth efficiency. With this approach, system overhead is reduced from as high as 100% for worst-case B frames with the conventional flow to less than 20%.

Golston, Jeremiah; Arora, Satish; Reddy, Ratna

2003-05-01

78

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

79

Highly accurate video coordinate generation for automatic 3-D trajectory calculation  

NASA Astrophysics Data System (ADS)

Most TV-based motion analysis systems, including the original version of 1/ICON, produce 3D coordinates by combining pre-tracked 2D trajectories from each camera. The latest version of the system, VICON-VX, uses totally automatic 3D trajectory calculation using the Geometric Self Identification (GSI) technique. This is achieved by matching unsorted 2D image coordinates from all cameras, looking for intersecting marker 'rays', and matching intersections into 3D trajectories. Effective GSI, with low false-positive intersection rates is only possible with highly accurate 2D data, produced by stable, high-resolution coordinate generators, and incorporating appropriate compensation for lens distortions. Data capture software and hardware have been completely redesigned to achieve this accuracy, together with higher throughput rates and better resistance to errors. In addition, a new ADC facility has been incorporated to allow very high speed analog data acquisition, synchronised with video measurements.

Macleod, A.; Morris, Julian R. W.; Lyster, M.

1990-08-01

80

Advanced study of video signal processing in low signal to noise environments  

NASA Technical Reports Server (NTRS)

The frame to frame correlation properties of the video process are utilized to reduce the mean squared error of the demodulated video where zero mean noise is a factor. An interpolative estimator is used for continuous estimation with the output process delayed in time by one frame. Theoretical development shows that for the model herein developed reduction of the mean squared error by 1.0 to 4.0 db possible for parameter ranges of interest. Interpolative estimation using inter-frame correlation properties of a video process is then applied to the Apollo 17 parameters to yield a model for application on that mission.

Carden, F.; Gilbert, A.

1972-01-01

81

SECOND GENERATION ADVANCED REBURNING FOR HIGH EFFICIENCY NOx CONTROL  

SciTech Connect

This project is designed to develop a family of novel NO{sub x} control technologies, called Second Generation Advanced Reburning which has the potential to achieve 90+ NO{sub x} control in coal fired boilers at a significantly lower cost than Selective Catalytic Reduction. The sixth reporting period in Phase II (January 1-March 31, 1999) included experimental activities and combined chemistry-mixing modeling on advanced gas reburning. The goal of combustion tests was to continue the work on identifying prospective promoters for the advanced reburning process. Tests were conducted in Controlled Temperature Tower (CTT) and Boiler Simulator Facility (BSF). Tests showed that some promoters significantly affect the reburning process when co-injected with NH{sub 3} . The promoters injected into reburning zone without NH{sub 3} in the amount 30 ppm do not significantly affect the reburning process. The modeling effort was focused on the description of Na effect on CO emissions in advanced reburning. Increase in CO concentration in flue gas upon Na injection results from inhibition of CO oxidation by Na species in the burnout zone.

Peter M. Maly; Vitali V. Lissianski; Vladimir M. Zamansky

1999-04-29

82

Object segmentation and tracking is a key component for new generation of digital video representation,  

E-print Network

are used to refine the motion segmentation results. In [6], a modified watershed algorithm is developed and video editing. In this paper, we present a general schema for video object modeling, which incorporates low-level visual features and hierarchical grouping. The schema provides a general framework for video

Chang, Shih-Fu

83

Practical generation of video textures using the auto-regressive process  

Microsoft Academic Search

Recently, there have been several attempts at creating 'video textures', that is, synthe- sising new (potentially infinitely long) video clips based on existing ones. One method for achieving this is to transform each frame of the video into an eigenspace using Principal Components Analysis so that the original sequence can be viewed as a signature through a low-dimensional space. A

Neill W. Campbell; Colin J. Dalton; David Gibson; David Oziem; Barry T. Thomas

2004-01-01

84

Practical Generation of Video Textures using the AutoRegressive Process  

Microsoft Academic Search

Recently, there have been several attempts at creating 'video textures', that is, synthesising new (potentially infinitely long) video clips based on existing ones. One way to do this is to transform each frame of the video into an eigenspace using Principal Components Analysis so that the original sequence can be viewed as a signature through this low-dimensional space. An ew

Neill W. Campbell; Colin J. Dalton; David P. Gibson; Barry T. Thomas

2002-01-01

85

SECOND GENERATION ADVANCED REBURNING FOR HIGH EFFICIENCY NOx CONTROL  

SciTech Connect

This project is designed to develop a family of novel NO{sub x} control technologies, called Second Generation Advanced Reburning which has the potential to achieve 90+ NO{sub x} control in coal fired boilers at a significantly lower cost than Selective Catalytic Reduction. The eighth reporting period in Phase II (July 1--September 26, 1999) included combined chemistry-mixing modeling on advanced gas reburning and experimental activities in support of modeling. Modeling efforts focused on description of AR-Lean--combination of basic reburning and co-injection of N-agent with overfire air. Modeling suggests that efficiency of AR-Lean strongly depends on the amount of the reburning fuel, temperature of flue gas at the point of OFA/N-agent injection, and evaporation time of N-agent. The model describes the most important features of AR-Lean and can be used for AR-Lean optimization.

Vladimir M. Zamansky; Peter M. Maly; Vitali V. Lissianski

1999-10-29

86

GRC Supporting Technology for NASA's Advanced Stirling Radioisotope Generator (ASRG)  

NASA Technical Reports Server (NTRS)

From 1999 to 2006, the NASA Glenn Research Center (GRC) supported a NASA project to develop a high-efficiency, nominal 110-We Stirling Radioisotope Generator (SRG110) for potential use on NASA missions. Lockheed Martin was selected as the System Integration Contractor for the SRG110, under contract to the Department of Energy (DOE). The potential applications included deep space missions, and Mars rovers. The project was redirected in 2006 to make use of the Advanced Stirling Convertor (ASC) that was being developed by Sunpower, Inc. under contract to GRC, which would reduce the mass of the generator and increase the power output. This change would approximately double the specific power and result in the Advanced Stirling Radioisotope Generator (ASRG). The SRG110 supporting technology effort at GRC was replanned to support the integration of the Sunpower convertor and the ASRG. This paper describes the ASRG supporting technology effort at GRC and provides details of the contributions in some of the key areas. The GRC tasks include convertor extended-operation testing in air and in thermal vacuum environments, heater head life assessment, materials studies, permanent magnet characterization and aging tests, structural dynamics testing, electromagnetic interference and electromagnetic compatibility characterization, evaluation of organic materials, reliability studies, and analysis to support controller development.

Schreiber, Jeffrey G.; Thieme, Lanny G.

2008-01-01

87

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

88

Next generation video coding for mobile applications: industry requirements and technologies  

NASA Astrophysics Data System (ADS)

Handheld battery-operated consumer electronics devices such as camera phones, digital still cameras, digital camcorders, and personal media players have become very popular in recent years. Video codecs are extensively used in these devices for video capture and/or playback. The annual shipment of such devices already exceeds a hundred million units and is growing, which makes mobile battery-operated video device requirements very important to focus in video coding research and development. This paper highlights the following unique set of requirements for video coding for these applications: low power consumption, high video quality at low complexity, and low cost, and motivates the need for a new video coding standard that enables better trade-offs of power consumption, complexity, and coding efficiency to meet the challenging requirements of portable video devices. This paper also provides a brief overview of some of the video coding technologies being presented in the ITU-T Video Coding Experts Group (VCEG) standardization body for computational complexity reduction and for coding efficiency improvement in a future video coding standard.

Budagavi, Madhukar; Zhou, Minhua

2007-01-01

89

Multimodality web video categorization  

Microsoft Academic Search

This paper reports a flrst comprehensive study and large- scale test on web video (so-called user generated video or micro video) categorization. Observing that web videos are characterized by a much higher diversity of quality, subject, style, and genres compared with traditional video programs, we focus on studying the efiectiveness of difierent modali- ties in dealing with such high variation.

Linjun Yang; Jiemin Liu; Xiaokang Yang; Xian-sheng Hua

2007-01-01

90

The Generative Effects of Graphic Organizers with Computer-Based Interactive Video by Global and Analytic Thinkers.  

ERIC Educational Resources Information Center

Computer-based interactive video (CBIV), a hypermedia system that uses the power of the computer to support student interaction with various audio and visual media, can pose such problems for students as the potential for learner disorientation and cognitive overload. Intended to explore the applicability of Wittrock's generative learning…

Kenny, Richard F.; And Others

91

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

92

Development of Advanced Stirling Radioisotope Generator for Space Exploration  

NASA Technical Reports Server (NTRS)

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 to 7 We/kg, along with a 25 percent 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

93

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

94

Next generation video coding for mobile applications: industry requirements and technologies  

Microsoft Academic Search

Handheld battery-operated consumer electronics devices such as camera phones, digital still cameras, digital camcorders, and personal media players have become very popular in recent years. Video codecs are extensively used in these devices for video capture and\\/or playback. The annual shipment of such devices already exceeds a hundred million units and is growing, which makes mobile battery-operated video device requirements

Madhukar Budagavi; Minhua Zhou

2007-01-01

95

Advanced numerical methods in mesh generation and mesh adaptation  

SciTech Connect

Numerical solution of partial differential equations requires appropriate meshes, efficient solvers and robust and reliable error estimates. Generation of high-quality meshes for complex engineering models is a non-trivial task. This task is made more difficult when the mesh has to be adapted to a problem solution. This article is focused on a synergistic approach to the mesh generation and mesh adaptation, where best properties of various mesh generation methods are combined to build efficiently simplicial meshes. First, the advancing front technique (AFT) is combined with the incremental Delaunay triangulation (DT) to build an initial mesh. Second, the metric-based mesh adaptation (MBA) method is employed to improve quality of the generated mesh and/or to adapt it to a problem solution. We demonstrate with numerical experiments that combination of all three methods is required for robust meshing of complex engineering models. The key to successful mesh generation is the high-quality of the triangles in the initial front. We use a black-box technique to improve surface meshes exported from an unattainable CAD system. The initial surface mesh is refined into a shape-regular triangulation which approximates the boundary with the same accuracy as the CAD mesh. The DT method adds robustness to the AFT. The resulting mesh is topologically correct but may contain a few slivers. The MBA uses seven local operations to modify the mesh topology. It improves significantly the mesh quality. The MBA method is also used to adapt the mesh to a problem solution to minimize computational resources required for solving the problem. The MBA has a solid theoretical background. In the first two experiments, we consider the convection-diffusion and elasticity problems. We demonstrate the optimal reduction rate of the discretization error on a sequence of adaptive strongly anisotropic meshes. The key element of the MBA method is construction of a tensor metric from hierarchical edge-based error estimates. We conclude that the quasi-optimal mesh must be quasi-uniform in this metric. All numerical experiments are based on the publicly available Ani3D package, the collection of advanced numerical instruments.

Lipnikov, Konstantine [Los Alamos National Laboratory; Danilov, A [MOSCOW, RUSSIA; Vassilevski, Y [MOSCOW, RUSSIA; Agonzal, A [UNIV OF LYON

2010-01-01

96

Advances in low-power visible/thermal IR video image fusion hardware  

NASA Astrophysics Data System (ADS)

Equinox Corporation has developed two new video board products for real-time image fusion of visible (or intensified visible/near-infrared) and thermal (emissive) infrared video. These products can provide unique capabilities to the dismounted soldier, maritime/naval operations and Unmanned Aerial Vehicles (UAVs) with low-power, lightweight, compact and inexpensive FPGA video fusion hardware. For several years Equinox Corporation has been studying and developing image fusion methodologies using the complementary modalities of the visible and thermal infrared wavebands including applications to face recognition, tracking, sensor development and fused image visualization. The video board products incorporate Equinox's proprietary image fusion algorithms into an FPGA architecture with embedded programmable capability. Currently included are (1) user interactive image fusion algorithms that go significantly beyond standard "A+B" fusion providing an intuitive color visualization invariant to distracting illumination changes, (2) generalized image co-registration to compensate for parallax, scale and rotation differences between visible/intensified and thermal IR, as well as non-linear optical and display distortion, and (3) automatic gain control (AGC) for dynamic range adaptation.

Wolff, Lawrence B.; Socolinsky, Diego A.; Eveland, Christopher K.; Reese, C. E.; Bender, E. J.; Wood, M. V.

2005-03-01

97

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

98

Investigation of advancing front method for generating unstructured grid  

NASA Technical Reports Server (NTRS)

The advancing front technique is used to generate an unstructured grid about simple aerodynamic geometries. Unstructured grids are generated using VGRID2D and VGRID3D software. Specific problems considered are a NACA 0012 airfoil, a bi-plane consisting of two NACA 0012 airfoil, a four element airfoil in its landing configuration, and an ONERA M6 wing. Inviscid time dependent solutions are computed on these geometries using USM3D and the results are compared with standard test results obtained by other investigators. A grid convergence study is conducted for the NACA 0012 airfoil and compared with a structured grid. A structured grid is generated using GRIDGEN software and inviscid solutions computed using CFL3D flow solver. The results obtained by unstructured grid for NACA 0012 airfoil showed an asymmetric distribution of flow quantities, and a fine distribution of grid was required to remove this asymmetry. On the other hand, the structured grid predicted a very symmetric distribution, but when the total number of points were compared to obtain the same results it was seen that structured grid required more grid points.

Thomas, A. M.; Tiwari, S. N.

1992-01-01

99

Bringing Evolution to a Technological Generation: A Case Study with the Video Game SPORE  

ERIC Educational Resources Information Center

The video game SPORE was found to hold characteristics that stimulate higher-order thinking even though it rated poorly for accurate science. Interested in evaluating whether a scientifically inaccurate video game could be used effectively, we exposed students to SPORE during an evolution course. Students that played the game reported that they…

Poli, DorothyBelle; Berenotto, Christopher; Blankenship, Sara; Piatkowski, Bryan; Bader, Geoffrey A.; Poore, Mark

2012-01-01

100

Traffic shaping for MPEG video transmission over the next generation internet  

E-print Network

, and it is best suited for real- time applications that can adapt themselves to the changing conditions carrying delay-sensitive applications like real-time video. The best- effort model is sufficient for non-real-time. However, within the next few years, an exponential growth of real-time applications such as video

Atiquzzaman, Mohammed

101

Analysis, Modeling and Generation of Self-Similar VBR Video Traffic  

Microsoft Academic Search

We present a detailed statistical analysis of a 2-hour long em- pirical sample of VBR video. The sample was obtained by applying a simple intraframe video compression code to an action movie. The main findings of our analysis are (1) the tail behavior of the marginal bandwidth distribution can be accurately described using \\

Mark W. Garrett; Walter Willinger

1994-01-01

102

Reliability Demonstration Approach for Advanced Stirling Radioisotope Generator  

NASA Technical Reports Server (NTRS)

Developed for future space missions as a high-efficiency power system, the Advanced Stirling Radioisotope Generator (ASRG) has a design life requirement of 14 yr in space following a potential storage of 3 yr after fueling. In general, the demonstration of long-life dynamic systems remains difficult in part due to the perception that the wearout of moving parts cannot be minimized, and associated failures are unpredictable. This paper shows a combination of systematic analytical methods, extensive experience gained from technology development, and well-planned tests can be used to ensure a high level reliability of ASRG. With this approach, all potential risks from each life phase of the system are evaluated and the mitigation adequately addressed. This paper also provides a summary of important test results obtained to date for ASRG and the planned effort for system-level extended operation.

Ha, CHuong; Zampino, Edward; Penswick, Barry; Spronz, Michael

2010-01-01

103

Second Generation Advanced Reburning for High Efficiency NOx Control  

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 SCR. The eleventh reporting period in Phase II (April 1-June 30, 2000) included design validation AR-Lean tests (Task 2.6) in the 10 x 10{sup 6} Btu/hr Tower Furnace. The objective of tests was to determine the efficiency of AR-Lean at higher than optimum OFA/N-Agent injection temperatures in large pilot-scale combustion facility. Tests demonstrated that co-injection of urea with overfire air resulted in NO{sub x} reduction. However, observed NO{sub x} reduction was smaller than that under optimum conditions.

Vladimir Zamansky

2000-06-30

104

Second Generation Advanced Reburning for High Efficiency NOx Control  

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 SCR. The thirteenth reporting period in Phase II (October 1-December 31, 2000) included SGAR tests in which coal was used as the reburning fuel. All test work was conducted at GE-EER's 1.0 MMBtu/hr Boiler Simulator Facility. Three test series were performed including AR-Lean, AR-Rich, and reburning + SNCR. Tests demonstrated that over 90% NO{sub x} reduction could be achieved with utilization of coal as a reburning fuel in SGAR. The most effective SGAR variant is reburning + SNCR followed by AR-Lean and AR-Rich.

Vladimir M. Zamansky; Pete M. Maly; Vitali V. Lissianski

2000-12-31

105

Second Generation Advanced Reburning for High Efficiency NOx Control  

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 SCR. The twelfth reporting period in Phase II (July 3-October 15, 2000) included design validation AR-Lean tests (Task No.2.6) in the 10 x 10{sup 6} Btu/hr Tower Furnace. The objective of tests was to determine the efficiency of AR-Lean at higher than optimum OFA/N-Agent injection temperatures in large pilot-scale combustion facility. Tests demonstrated that co-injection of urea with overfire air resulted in NO{sub x} reduction. However, observed NO{sub x} reduction was smaller than that under optimum conditions.

Roy Payne; Lary Swanson; Antonio Marquez; Ary Chang; Vladimir M. Zamansky; Pete M. Maly; Vitali V. Lissianski

2000-09-30

106

Thermal Model Predictions of Advanced Stirling Radioisotope Generator Performance  

NASA Technical Reports Server (NTRS)

This paper presents recent thermal model results of the Advanced Stirling Radioisotope Generator (ASRG). The three-dimensional (3D) ASRG thermal power model was built using the Thermal Desktop(trademark) thermal analyzer. The model was correlated with ASRG engineering unit test data and ASRG flight unit predictions from Lockheed Martin's (LM's) I-deas(trademark) TMG thermal model. The auxiliary cooling system (ACS) of the ASRG is also included in the ASRG thermal model. The ACS is designed to remove waste heat from the ASRG so that it can be used to heat spacecraft components. The performance of the ACS is reported under nominal conditions and during a Venus flyby scenario. The results for the nominal case are validated with data from Lockheed Martin. Transient thermal analysis results of ASRG for a Venus flyby with a representative trajectory are also presented. In addition, model results of an ASRG mounted on a Cassini-like spacecraft with a sunshade are presented to show a way to mitigate the high temperatures of a Venus flyby. It was predicted that the sunshade can lower the temperature of the ASRG alternator by 20 C for the representative Venus flyby trajectory. The 3D model also was modified to predict generator performance after a single Advanced Stirling Convertor failure. The geometry of the Microtherm HT insulation block on the outboard side was modified to match deformation and shrinkage observed during testing of a prototypic ASRG test fixture by LM. Test conditions and test data were used to correlate the model by adjusting the thermal conductivity of the deformed insulation to match the post-heat-dump steady state temperatures. Results for these conditions showed that the performance of the still-functioning inboard ACS was unaffected.

Wang, Xiao-Yen J.; Fabanich, William Anthony; Schmitz, Paul C.

2014-01-01

107

Flight evaluation of advanced third-generation midwave infrared sensor  

NASA Astrophysics Data System (ADS)

In FY-97 the Counter Drug Optical Upgrade (CDOU) demonstration program was initiated by the Program Executive Office for Counter Drug to increase the detection and classification ranges of P-3 counter drug aircraft by using advanced staring infrared sensors. The demonstration hardware is a `pin-for-pin' replacement of the AAS-36 Infrared Detection Set (IRDS) located under the nose radome of a P-3 aircraft. The hardware consists of a 3rd generation mid-wave infrared (MWIR) sensor integrated into a three axis-stabilized turret. The sensor, when installed on the P- 3, has a hemispheric field of regard and analysis has shown it will be capable of detecting and classifying Suspected Drug Trafficking Aircraft and Vessels at ranges several factors over the current IRDS. This paper will discuss the CDOU system and it's lab, ground, and flight evaluation results. Test targets included target templates, range targets, dedicated target boats, and targets of opportunity at the Naval Air Warfare Center Aircraft Division and at operational test sites. The objectives of these tests were to: (1) Validate the integration concept of the CDOU package into the P-3 aircraft. (2) Validate the end-to-end functionality of the system, including sensor/turret controls and recording of imagery during flight. (3) Evaluate the system sensitivity and resolution on a set of verified resolution targets templates. (4) Validate the ability of the 3rd generation MWIR sensor to detect and classify targets at a significantly increased range.

Shen, Chyau N.; Donn, Matthew

1998-08-01

108

Toxicogenomics and cancer susceptibility: advances with next-generation sequencing.  

PubMed

The aim of this review is to comprehensively summarize the recent achievements in the field of toxicogenomics and cancer research regarding genetic-environmental interactions in carcinogenesis and detection of genetic aberrations in cancer genomes by next-generation sequencing technology. Cancer is primarily a genetic disease in which genetic factors and environmental stimuli interact to cause genetic and epigenetic aberrations in human cells. Mutations in the germline act as either high-penetrance alleles that strongly increase the risk of cancer development, or as low-penetrance alleles that mildly change an individual's susceptibility to cancer. Somatic mutations, resulting from either DNA damage induced by exposure to environmental mutagens or from spontaneous errors in DNA replication or repair are involved in the development or progression of the cancer. Induced or spontaneous changes in the epigenome may also drive carcinogenesis. Advances in next-generation sequencing technology provide us opportunities to accurately, economically, and rapidly identify genetic variants, somatic mutations, gene expression profiles, and epigenetic alterations with single-base resolution. Whole genome sequencing, whole exome sequencing, and RNA sequencing of paired cancer and adjacent normal tissue present a comprehensive picture of the cancer genome. These new findings should benefit public health by providing insights in understanding cancer biology, and in improving cancer diagnosis and therapy. PMID:24875441

Ning, Baitang; Su, Zhenqiang; Mei, Nan; Hong, Huixiao; Deng, Helen; Shi, Leming; Fuscoe, James C; Tolleson, William H

2014-01-01

109

Advanced surveillance systems: combining video and thermal imagery for pedestrian detection  

NASA Astrophysics Data System (ADS)

In the current context of increased surveillance and security, more sophisticated surveillance systems are needed. One idea relies on the use of pairs of video (visible spectrum) and thermal infrared (IR) cameras located around premises of interest. To automate the system, a dedicated image processing approach is required, which is described in the paper. The first step in the proposed study is to collect a database of known scenarios both indoor and outdoor with a few pedestrians. These image sequences (video and TIR) are synchronized, geometrically corrected and temperature calibrated. The next step is to develop a segmentation strategy to extract the regions of interest (ROI) corresponding to pedestrians in the images. The retained strategy exploits the motion in the sequences. Next, the ROIs are grouped from image to image separately for both video and TIR sequences before a fusion algorithm proceeds to track and detect humans. This insures a more robust performance. Finally, specific criteria of size and temperature relevant to humans are introduced as well. Results are presented for a few typical situations.

Torresan, Helene; Turgeon, Benoit; Ibarra-Castanedo, Clemente; Hebert, Patrick; Maldague, Xavier P.

2004-04-01

110

Application of the advanced communications technology satellite to teleradiology and real-time compressed ultrasound video telemedicine.  

PubMed

The authors have investigated the application of the NASA Advanced Communications Technology Satellite (ACTS) to teleradiology and telemedicine using the Jet Propulsion Laboratory (JPL)-developed ACTS Mobile Terminal (AMT) uplink. In this experiment, bidirectional 128, 256, and 384 kbps satellite links were established between the ACTS/AMT, the ACTS in geosynchronous orbit, and the downlink terrestrial terminal at JPL. A terrestrial Integrated Digital Services Network (ISDN) link was established from JPL to the University of Washington Department of Radiology to complete the bidirectional connection. Ultrasound video imagery was compressed in real-time using video codecs adhering to the International Telecommunication Union-Telecommunication Standardization Sector (ITU-T) Recommendation H.261. A 16 kbps in-band audio channel was used throughout. A five-point Likert scale was used to evaluate the quality of the compressed ultrasound imagery at the three transmission bandwidths (128, 256, and 384 kbps). The central question involved determination of the bandwidth requirements to provide sufficient spatial and contrast resolution for the remote visualization of fine- and low-contrast objects. The 384 kbps bandwidth resulted in only slight tiling artifact and fuzziness owing to the quantizer step size; however, these motion artifacts were rapidly resolved in time at this bandwidth. 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 educational at a distance. PMID:10342249

Stewart, B K; Carter, S J; Cook, J N; Abbe, B S; Pinck, D; Rowberg, A H

1999-05-01

111

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

112

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

113

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

114

The next generation in aircraft protection against advanced MANPADS  

NASA Astrophysics Data System (ADS)

This paper discusses the advanced and novel technologies and underlying systems capabilities that Selex ES has applied during the development, test and evaluation of the twin head Miysis DIRCM System in order to ensure that it provides the requisite levels of protection against the latest, sophisticated all-aspect IR MANPADS. The importance of key performance parameters, including the fundamental need for "spherical" coverage, rapid time to energy-on-target, laser tracking performance and radiant intensity on seeker dome is covered. It also addresses the approach necessary to ensure that the equipment is suited to all air platforms from the smallest helicopters to large transports, while also ensuring that it achieves an inherent high reliability and an ease of manufacture and repair such that a step change in through-life cost in comparison to previous generation systems can be achieved. The benefits and issues associated with open architecture design are also considered. Finally, the need for extensive test and evaluation at every stage, including simulation, laboratory testing, platform and target dynamic testing in a System Integration Laboratory (SIL), flight trial, missile live-fire, environmental testing and reliability testing is also described.

Chapman, Stuart

2014-10-01

115

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

116

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

117

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 is characterized by highly structured tasks or outcomes, relatively low level or number of skills required. WLS 3 ­ Skilled Level ­ The work is typically skilled, requires little direct supervision, requires

Baltisberger, Jay H.

118

Advanced Virgo: a second-generation interferometric gravitational wave detector  

NASA Astrophysics Data System (ADS)

Advanced Virgo is the project to upgrade the Virgo interferometric detector of gravitational waves, with the aim of increasing the number of observable galaxies (and thus the detection rate) by three orders of magnitude. The project is now in an advanced construction phase and the assembly and integration will be completed by the end of 2015. Advanced Virgo will be part of a network, alongside the two Advanced LIGO detectors in the US and GEO HF in Germany, with the goal of contributing to the early detection of gravitational waves and to opening a new window of observation on the universe. In this paper we describe the main features of the Advanced Virgo detector and outline the status of the construction.

Acernese, F.; Agathos, M.; Agatsuma, K.; Aisa, D.; Allemandou, N.; Allocca, A.; Amarni, J.; Astone, P.; Balestri, G.; Ballardin, G.; Barone, F.; Baronick, J.-P.; Barsuglia, M.; Basti, A.; Basti, F.; Bauer, Th S.; Bavigadda, V.; Bejger, M.; Beker, M. G.; Belczynski, C.; Bersanetti, D.; Bertolini, A.; Bitossi, M.; Bizouard, M. A.; Bloemen, S.; Blom, M.; Boer, M.; Bogaert, G.; Bondi, D.; Bondu, F.; Bonelli, L.; Bonnand, R.; Boschi, V.; Bosi, L.; Bouedo, T.; Bradaschia, C.; Branchesi, M.; Briant, T.; Brillet, A.; Brisson, V.; Bulik, T.; Bulten, H. J.; Buskulic, D.; Buy, C.; Cagnoli, G.; Calloni, E.; Campeggi, C.; Canuel, B.; Carbognani, F.; Cavalier, F.; Cavalieri, R.; Cella, G.; Cesarini, E.; Chassande-Mottin, E.; Chincarini, A.; Chiummo, A.; Chua, S.; Cleva, F.; Coccia, E.; Cohadon, P.-F.; Colla, A.; Colombini, M.; Conte, A.; Coulon, J.-P.; Cuoco, E.; Dalmaz, A.; D’Antonio, S.; Dattilo, V.; Davier, M.; Day, R.; Debreczeni, G.; Degallaix, J.; Deléglise, S.; Del Pozzo, W.; Dereli, H.; De Rosa, R.; Di Fiore, L.; Di Lieto, A.; Di Virgilio, A.; Doets, M.; Dolique, V.; Drago, M.; Ducrot, M.; Endr?czi, G.; Fafone, V.; Farinon, S.; Ferrante, I.; Ferrini, F.; Fidecaro, F.; Fiori, I.; Flaminio, R.; Fournier, J.-D.; Franco, S.; Frasca, S.; Frasconi, F.; Gammaitoni, L.; Garufi, F.; Gaspard, M.; Gatto, A.; Gemme, G.; Gendre, B.; Genin, E.; Gennai, A.; Ghosh, S.; Giacobone, L.; Giazotto, A.; Gouaty, R.; Granata, M.; Greco, G.; Groot, P.; Guidi, G. M.; Harms, J.; Heidmann, A.; Heitmann, H.; Hello, P.; Hemming, G.; Hennes, E.; Hofman, D.; Jaranowski, P.; Jonker, R. J. G.; Kasprzack, M.; Kéfélian, F.; Kowalska, I.; Kraan, M.; Królak, A.; Kutynia, A.; Lazzaro, C.; Leonardi, M.; Leroy, N.; Letendre, N.; Li, T. G. F.; Lieunard, B.; Lorenzini, M.; Loriette, V.; Losurdo, G.; Magazzù, C.; Majorana, E.; Maksimovic, I.; Malvezzi, V.; Man, N.; Mangano, V.; Mantovani, M.; Marchesoni, F.; Marion, F.; Marque, J.; Martelli, F.; Martellini, L.; Masserot, A.; Meacher, D.; Meidam, J.; Mezzani, F.; Michel, C.; Milano, L.; Minenkov, Y.; Moggi, A.; Mohan, M.; Montani, M.; Morgado, N.; Mours, B.; Mul, F.; Nagy, M. F.; Nardecchia, I.; Naticchioni, L.; Nelemans, G.; Neri, I.; Neri, M.; Nocera, F.; Pacaud, E.; Palomba, C.; Paoletti, F.; Paoli, A.; Pasqualetti, A.; Passaquieti, R.; Passuello, D.; Perciballi, M.; Petit, S.; Pichot, M.; Piergiovanni, F.; Pillant, G.; Piluso, A.; Pinard, L.; Poggiani, R.; Prijatelj, M.; Prodi, G. A.; Punturo, M.; Puppo, P.; Rabeling, D. S.; Rácz, I.; Rapagnani, P.; Razzano, M.; Re, V.; Regimbau, T.; Ricci, F.; Robinet, F.; Rocchi, A.; Rolland, L.; Romano, R.; Rosi?ska, D.; Ruggi, P.; Saracco, E.; Sassolas, B.; Schimmel, F.; Sentenac, D.; Sequino, V.; Shah, S.; Siellez, K.; Straniero, N.; Swinkels, B.; Tacca, M.; Tonelli, M.; Travasso, F.; Turconi, M.; Vajente, G.; van Bakel, N.; van Beuzekom, M.; van den Brand, J. F. J.; Van Den Broeck, C.; van der Sluys, M. V.; van Heijningen, J.; Vasúth, M.; Vedovato, G.; Veitch, J.; Verkindt, D.; Vetrano, F.; Viceré, A.; Vinet, J.-Y.; Visser, G.; Vocca, H.; Ward, R.; Was, M.; Wei, L.-W.; Yvert, M.; Zadro ?ny, A.; Zendri, J.-P.

2015-01-01

119

Advanced Virgo: a 2nd generation interferometric gravitational wave detector  

E-print Network

Advanced Virgo is the project to upgrade the Virgo interferometric detector of gravitational waves, with the aim of increasing the number of observable galaxies (and thus the detection rate) by three orders of magnitude. The project is now in an advanced construction phase and the assembly and integration will be completed by the end of 2015. Advanced Virgo will be part of a network with the two Advanced LIGO detectors in the US and GEO HF in Germany, with the goal of contributing to the early detections of gravitational waves and to opening a new observation window on the universe. In this paper we describe the main features of the Advanced Virgo detector and outline the status of the construction.

F. Acernese; M. Agathos; K. Agatsuma; D. Aisa; N. Allemandou; A. Allocca; J. Amarni; P. Astone; G. Balestri; G. Ballardin; F. Barone; J. -P. Baronick; M. Barsuglia; A. Basti; F. Basti; Th. S. Bauer; V. Bavigadda; M. Bejger; M. G. Beker; C. Belczynski; D. Bersanetti; A. Bertolini; M. Bitossi; M. A. Bizouard; S. Bloemen; M. Blom; M. Boer; G. Bogaert; D. Bondi; F. Bondu; L. Bonelli; R. Bonnand; V. Boschi; L. Bosi; T. Bouedo; C. Bradaschia; M. Branchesi; T. Briant; A. Brillet; V. Brisson; T. Bulik; H. J. Bulten; D. Buskulic; C. Buy; G. Cagnoli; E. Calloni; C. Campeggi; B. Canuel; F. Carbognani; F. Cavalier; R. Cavalieri; G. Cella; E. Cesarini; E. Chassande-Mottin; A. Chincarini; A. Chiummo; S. Chua; F. Cleva; E. Coccia; P. -F. Cohadon; A. Colla; M. Colombini; A. Conte; J. -P. Coulon; E. Cuoco; A. Dalmaz; S. D'Antonio; V. Dattilo; M. Davier; R. Day; G. Debreczeni; J. Degallaix; S. Deléglise; W. Del Pozzo; H. Dereli; R. De Rosa; L. Di Fiore; A. Di Lieto; A. Di Virgilio; M. Doets; V. Dolique; M. Drago; M. Ducrot; G. Endr?czi; V. Fafone; S. Farinon; I. Ferrante; F. Ferrini; F. Fidecaro; I. Fiori; R. Flaminio; J. -D. Fournier; S. Franco; S. Frasca; F. Frasconi; L. Gammaitoni; F. Garufi; M. Gaspard; A. Gatto; G. Gemme; B. Gendre; E. Genin; A. Gennai; S. Ghosh; L. Giacobone; A. Giazotto; R. Gouaty; M. Granata; G. Greco; P. Groot; G. M. Guidi; J. Harms; A. Heidmann; H. Heitmann; P. Hello; G. Hemming; E. Hennes; D. Hofman; P. Jaranowski; R. J. G. Jonker; M. Kasprzack; F. Kéfélian; I. Kowalska; M. Kraan; A. Królak; A. Kutynia; C. Lazzaro; M. Leonardi; N. Leroy; N. Letendre; T. G. F. Li; B. Lieunard; M. Lorenzini; V. Loriette; G. Losurdo; C. Magazzù; E. Majorana; I. Maksimovic; V. Malvezzi; N. Man; V. Mangano; M. Mantovani; F. Marchesoni; F. Marion; J. Marque; F. Martelli; L. Martellini; A. Masserot; D. Meacher; J. Meidam; F. Mezzani; C. Michel; L. Milano; Y. Minenkov; A. Moggi; M. Mohan; M. Montani; N. Morgado; B. Mours; F. Mul; M. F. Nagy; I. Nardecchia; L. Naticchioni; G. Nelemans; I. Neri; M. Neri; F. Nocera; E. Pacaud; C. Palomba; F. Paoletti; A. Paoli; A. Pasqualetti; R. Passaquieti; D. Passuello; M. Perciballi; S. Petit; M. Pichot; F. Piergiovanni; G. Pillant; A Piluso; L. Pinard; R. Poggiani; M. Prijatelj; G. A. Prodi; M. Punturo; P. Puppo; D. S. Rabeling; I. Rácz; P. Rapagnani; M. Razzano; V. Re; T. Regimbau; F. Ricci; F. Robinet; A. Rocchi; L. Rolland; R. Romano; D. Rosi?ska; P. Ruggi; E. Saracco; B. Sassolas; F. Schimmel; D. Sentenac; V. Sequino; S. Shah; K. Siellez; N. Straniero; B. Swinkels; M. Tacca; M. Tonelli; F. Travasso; M. Turconi; G. Vajente; N. van Bakel; M. van Beuzekom; J. F. J. van den Brand; C. Van Den Broeck; M. V. van der Sluys; J. van Heijningen; M. Vasúth; G. Vedovato; J. Veitch; D. Verkindt; F. Vetrano; A. Viceré; J. -Y. Vinet; G. Visser; H. Vocca; R. Ward; M. Was; L. -W. Wei; M. Yvert; A. Zadro?ny; J. -P. Zendri

2014-10-16

120

Recent advances in stacked inverted top-emitting organic electrophosphorescent diodes (presentation video)  

NASA Astrophysics Data System (ADS)

In this talk, we will discuss recent advances in green and white electrophosphorescent stacked organic light-emitting diodes (OLEDs) with inverted top-emitting structures. These devices combine the advantages of having inverted electrode positions, a top-emissive design, and a stacked architecture. We will also demonstrate OLEDs that are fabricated on cellulose nanocrystal substrates and discuss how the use of such naturally-derived materials can reduce the environmental footprint of organic electronic devices such as OLEDs.

Kippelen, Bernard; Knauer, Keith A.; Najafabadi, Ehsan M.; Zhou, Yinhua; Fuentes-Hernandez, Canek

2014-10-01

121

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

122

Advancing the Next Generation of Health Risk Assessment  

EPA Science Inventory

Over the past 20 years, knowledge of the genome and its function has increased dramatically, but risk assessment methodologies utilizing such knowledge have not advanced accordingly. Objective. This review describes a collaborative effort among several federal and stat...

123

NETGEN -An Advancing Front 2D/3D-Mesh Generator Based on Abstract Rules  

E-print Network

NETGEN - An Advancing Front 2D/3D-Mesh Generator Based on Abstract Rules Joachim Schoberl Abstract In this paper, the algorithms of the automatic mesh generator NETGEN are described. The domain is provided by a Constructive Solid Geometry (CSG). The whole task of 3D mesh generation splits into four subproblems of special

Schoeberl, Joachim

124

Video Golf  

NASA Technical Reports Server (NTRS)

George Nauck of ENCORE!!! invented and markets the Advanced Range Performance (ARPM) Video Golf System for measuring the result of a golf swing. After Nauck requested their assistance, Marshall Space Flight Center scientists suggested video and image processing/computing technology, and provided leads on commercial companies that dealt with the pertinent technologies. Nauck contracted with Applied Research Inc. to develop a prototype. The system employs an elevated camera, which sits behind the tee and follows the flight of the ball down range, catching the point of impact and subsequent roll. Instant replay of the video on a PC monitor at the tee allows measurement of the carry and roll. The unit measures distance and deviation from the target line, as well as distance from the target when one is selected. The information serves as an immediate basis for making adjustments or as a record of skill level progress for golfers.

1995-01-01

125

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

126

OdoCapsule: Next Generation Wireless Capsule Endoscopy with Accurate Localization and Video Stabilization.  

PubMed

In this paper, we propose a platform to achieve accurate localization of small-bowel lesions and endoscopic video stabilization in wireless capsule endoscopy. Current research modules rely on the use of external magnetic fields and triangulation methods to calculate the position vector of the capsule, leading to considerable error margins. Our platform, entitled OdoCapsule (a synthesis of the words Odometer and Capsule), provides real-time distance information from the point of duodenal entry to the point of exit from the small-bowel. To achieve this, OdoCapsule is equipped with 3 miniature legs. Each leg carries a soft rubber wheel, which is made with humancompliant material. These legs are extendable and retractable thanks to a micro-motor and 3 custom-made torsion springs. The wheels are specifically designed to function as micro-odometers: each rotation they perform is registered. Hence the covered distance is measured accurately in real-time. Furthermore, with its legs fully extended, OdoCapsule can stabilize itself inside the small-bowel lumen thus offering smoother video capture and better image processing. Recent ex-vivo testing of this concept, using porcine small-bowel and a commercially available (custommodified) capsule endoscope, has proved its viability. PMID:25167544

Karargyris, Alexandros; Koulaouzidis, Anastasios

2014-08-27

127

Next Generation Risk Assessment: Incorporation of Recent Advances in Molecular, Computational, and Systems Biology (Final Report)  

EPA Science Inventory

This final report, "Next Generation Risk Assessment: Recent Advances in Molecular, Computational, and Systems Biology", describes new approaches that are faster, less resource intensive, and more robust that can help address the challenges of assessing potential health hazards fo...

128

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

129

Flight evaluation of advanced third-generation midwave infrared sensor  

Microsoft Academic Search

In FY-97 the Counter Drug Optical Upgrade (CDOU) demonstration program was initiated by the Program Executive Office for Counter Drug to increase the detection and classification ranges of P-3 counter drug aircraft by using advanced staring infrared sensors. The demonstration hardware is a `pin-for-pin' replacement of the AAS-36 Infrared Detection Set (IRDS) located under the nose radome of a P-3

Chyau N. Shen; Matthew Donn

1998-01-01

130

Development and application of an advanced switched reluctance generator drive  

E-print Network

This dissertation contains the results of research conducted on the design and control characterization of a Switched Reluctance Generator (SRG) for maximum output power. The SRG is an attractive solution to the increasing worldwide demand...

Asadi, Peyman

2009-05-15

131

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

132

Primary electric power generation systems for advanced-technology engines  

NASA Technical Reports Server (NTRS)

The advantages of the all electric airplane are discussed. In the all electric airplane the generator is the sole source of electric power; it powers the primary and secondary flight controls, the environmentals, and the landing gear. Five candidates for all electric power systems are discussed and compared. Cost benefits of the all electric airplane are discussed.

Cronin, M. J.

1983-01-01

133

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

134

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

135

Semiautomatic video object generation using multivalued watershed and partition lattice operators  

Microsoft Academic Search

We conceive the problem of multiple semantic wide object (SVO) extraction as an issue of designing extensive operators on the lattice of partitions. As a result, we propose a framework based on spatial partition generation and application of optimal operators on the generated partitions. The first stage is obtained with a multivalued morphological spatial segmentation method that incorporates an edge-driven

Daniel Gatica-Perez; Ming-Ting Sun; Chuang Gu

2000-01-01

136

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

137

Advanced pulse generator and preamplifier for the HELEN laser  

NASA Astrophysics Data System (ADS)

A replacement for the HELEN laser has been proposed that would involve a considerable increase in performance up to 100 TW from 32 beams. The design for the new laser is to be based on the technology being developed for the US National Ignition Facility. The pulse generation and preamplification stages employ novel technologies and represent a significant departure from previous designs. As part of the laser replacement development program a pulse generator and preamplifier have been built and installed on the HELEN laser at AWE, based on those employed on the Beamlet laser physics demonstration facility at Lawrence Livermore National Laboratory. As well as providing experience of the technologies involved, this system represents a significant enhancement of the performance of HELEN. Initial pulses are generated by a diode-pumped Q-switched Neodymium-doped Yttrium Lithium Fluoride ring oscillator. These are then launched into optical fiber and transported to a series of two integrated optics amplitude modulators for pulse shaping. The resulting pulses are then transported by optical fibers to a ring regenerative preamplifier for amplification to a level suitable for input to the HELEN laser. We describe this system, its performance and the enhanced capabilities of the HELEN laser resulting from its installation.

Norman, Michael J.; Harvey, E. J.; Hopps, N. W.; Nolan, J. R.; Smith, W. F. E.

1997-12-01

138

Generating audio-responsive video images in real-time for a live symphony performance  

E-print Network

Multimedia performances, uniting music and interactive images, are a unique form of entertainment that has been explored by artists for centuries. This audio-visual combination has evolved from rudimentary devices generating visuals for single...

Beane, Allison Brooke

2007-09-17

139

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

140

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

141

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

142

Arbitrary view generation for three-dimensional scenes from uncalibrated video cameras  

Microsoft Academic Search

This paper focuses on the representation and arbitrary view generation of three dimensional (3-D) scenes. In contrast to existing methods that construct a full 3-D model or those that exploit geometric invariants, our representation consists of dense depth maps at several preselected viewpoints from an image sequence. Furthermore, instead of using multiple calibrated stationary cameras or range data, we derive

Nelson L. Chang; Avideh Zakhor

1995-01-01

143

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

144

Advances in Alport syndrome diagnosis using next-generation sequencing  

PubMed Central

Alport syndrome (ATS) is a hereditary nephropathy often associated with sensorineural hypoacusis and ocular abnormalities. Mutations in the COL4A5 gene cause X-linked ATS. Mutations in COL4A4 and COL4A3 genes have been reported in both autosomal recessive and autosomal dominant ATS. The conventional mutation screening, performed by DHPLC and/or Sanger sequencing, is time-consuming and has relatively high costs because of the absence of hot spots and to the high number of exons per gene: 51 (COL4A5), 48 (COL4A4) and 52 (COL4A3). Several months are usually necessary to complete the diagnosis, especially in cases with less informative pedigrees. To overcome these limitations, we designed a next-generation sequencing (NGS) protocol enabling simultaneous detection of all possible variants in the three genes. We used a method coupling selective amplification to the 454 Roche DNA sequencing platform (Genome Sequencer junior). The application of this technology allowed us to identify the second mutation in two ATS patients (p.Ser1147Phe in COL4A3 and p.Arg1682Trp in COL4A4) and to reconsider the diagnosis of ATS in a third patient. This study, therefore, illustrates the successful application of NGS to mutation screening of Mendelian disorders with locus heterogeneity. PMID:21897443

Artuso, Rosangela; Fallerini, Chiara; Dosa, Laura; Scionti, Francesca; Clementi, Maurizio; Garosi, Guido; Massella, Laura; Epistolato, Maria Carmela; Mancini, Roberta; Mari, Francesca; Longo, Ilaria; Ariani, Francesca; Renieri, Alessandra; Bruttini, Mirella

2012-01-01

145

Policy for Instructional Video.  

ERIC Educational Resources Information Center

An examination of the general uses of video in instruction helps to formulate appropriate policy for maximizing video production and use. Wide use of instructional television makes advanced knowledge more usable and increases public awareness of new discoveries, reduces the time lag between conception and application of ideas which change society,…

Lipson, Joseph I.

146

Video Event Trigger  

NASA Technical Reports Server (NTRS)

Video event trigger (VET) processes video image data to generate trigger signal when image shows significant change like motion or appearance, disappearance, change in color, change in brightness, or dilation of object. System aids in efficient utilization of image-data-storage and image-data-processing equipment in applications in which many video frames show no changes and are wasteful to record and analyze all frames when only relatively few frames show changes of interest. Applications include video recording of automobile crash tests, automated video monitoring of entrances, exits, parking lots, and secure areas.

Williams, Glenn L.; Lichter, Michael J.

1994-01-01

147

Advancing Design-for-Assembly: The Next Generation in Assembly Planning  

SciTech Connect

At the 1995 IEEE Symposium on Assembly and Task Planning, Sandia National Laboratories introduced the Archimedes 2 Software Tool [2]. The system was described as a second-generation assembly planning system that allowed preliminmy application of awembly planning for industry, while solidly supporting further research in planning techniques. Sandia has worked closely with indust~ and academia over the last four years. The results of these working relationships have bridged a gap for the next generation in assembly planning. Zke goal of this paper is to share Sandia 's technological advancements in assembly planning over the last four years and the impact these advancements have made on the manufacturing communip.

Calton, T.L.

1998-12-09

148

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

149

Made in Florida: Videos  

NSDL National Science Digital Library

This webpage from the Florida Advanced Technological Education Center for Manufacturing (FLATE) features two videos which will help students understand the manufacturing of products domestically. Specifically, the videos focus on products made in the state of Florida. More than 16,000 companies and 400,000 Florida residents are active in manufacturing. The first video, which focuses on general manufacturing in Florida, is available in English and Spanish. The second video, which is only available in English, looks at the manufacture of Tropicana orange juice.

2011-09-19

150

Toward a new generation of low-loss mirrors for the advanced gravitational waves interferometers.  

PubMed

The new generation of advanced interferometer needs fused silica mirrors having better optical and mechanical properties. This Letter describes the way to reduce the ion beam sputtering coating absorption at 1064 nm and to improve the layer thickness uniformity in order to coat two large mirrors (diameter 35 cm) at the same time. PMID:21499372

Pinard, L; Sassolas, B; Flaminio, R; Forest, D; Lacoudre, A; Michel, C; Montorio, J L; Morgado, N

2011-04-15

151

Error resilient transmission of 3D DCT coded video.  

E-print Network

??Current multimedia applications involve video transmission over unprotected noisy channels where the video stream is contaminated with errors thereby requiring advanced error concealment/correction strategies. Our… (more)

Sawant, Supriya Dilip.

2006-01-01

152

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

153

Advances in Thermal Spray Coatings for Gas Turbines and Energy Generation: A Review  

NASA Astrophysics Data System (ADS)

Functional coatings are widely used in energy generation equipment in industries such as renewables, oil and gas, propulsion engines, and gas turbines. Intelligent thermal spray processing is vital in many of these areas for efficient manufacturing. Advanced thermal spray coating applications include thermal management, wear, oxidation, corrosion resistance, sealing systems, vibration and sound absorbance, and component repair. This paper reviews the current status of materials, equipment, processing, and properties' aspects for key coatings in the energy industry, especially the developments in large-scale gas turbines. In addition to the most recent industrial advances in thermal spray technologies, future technical needs are also highlighted.

Hardwicke, Canan U.; Lau, Yuk-Chiu

2013-06-01

154

Mobile-cloud assisted video summarization framework for efficient management of remote sensing data generated by wireless capsule sensors.  

PubMed

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

155

Testing of the Advanced Stirling Radioisotope Generator Engineering Unit at NASA Glenn Research Center  

NASA Technical Reports Server (NTRS)

The Advanced Stirling Radioisotope Generator (ASRG) is a high-efficiency generator being developed for potential use on a Discovery 12 space mission. Lockheed Martin designed and fabricated the ASRG Engineering Unit (EU) under contract to the Department of Energy. This unit was delivered to NASA Glenn Research Center in 2008 and has been undergoing extended operation testing to generate long-term performance data for an integrated system. It has also been used for tests to characterize generator operation while varying control parameters and system inputs, both when controlled with an alternating current (AC) bus and with a digital controller. The ASRG EU currently has over 27,000 hours of operation. This paper summarizes all of the tests that have been conducted on the ASRG EU over the past 3 years and provides an overview of the test results and what was learned.

Lewandowski, Edward J.

2013-01-01

156

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

157

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

158

Streaming video for distributed simulation  

NASA Astrophysics Data System (ADS)

Distributed simulation environments are increasingly using video to stimulate operational systems and their prototypical equivalents. Traditionally, this video has been synthesized and delivered by an analog means to consuming software applications. Scene generators typically render to commodity video cards, generate out of band metadata, and convert their outputs to formats compatible with the stimulated systems. However, the approach becomes hardware intensive as environment scale and distribution requirements grow. Streaming video technologies can be applied to uncouple video sources from their consumers, thereby enabling video channel quantities beyond rendering hardware outputs. Moreover, metadata describing the video content can be multiplexed, thereby ensuring temporal registration between video and its attribution. As an application of this approach, the Night Vision Image Generator (NVIG) has been extended and integrated with distribution architectures to deliver streaming video in virtual simulation environments. Video capture hardware emulation and application frame buffer reads are considered for capturing rendered scenes. Video source to encoder bindings and content multiplexing are realized by combining third party video codec, container, and transport implementations with original metadata encoders. Readily available commercial and open source solutions are utilized for content distribution and demultiplexing to a variety of formats and clients. Connected and connectionless distribution approaches are discussed with respect to latency and reliability. Client side scalability, latency, and initialization issues are addressed. Finally, the solution is applied to tactical systems stimulus and training, showing the evolvement from the analog to the streamed video approach.

Webster, Steven G.; Paul, Douglas J.

2010-04-01

159

Video editing support by tagging on the fly while shooting video Shun Nakaigawa,  

E-print Network

2 Video editing support by tagging on the fly while shooting video Shun Nakaigawa, Shin Takahashi and Jiro Tanaka In this paper, we describe a live-action video production support system for end-dimensional marker at the time of shooting a video in the video production. The system generates the set of the tag

Tanaka, Jiro

160

Chidi holographic video system  

NASA Astrophysics Data System (ADS)

Holo-Chidi is a holographic video processing system designed at the MIT Media Laboratory for real-time computation of Computer Generated Holograms and the subsequent display of the holograms at video frame rates. It's processing engine is adapted from Chidi which is reconfigurable multimedia processing system used for real-time synthesis and analysis of digital video frames. Holo-Chidi is made of two main components: the sets of Chidi processor cards and the display video concentrator card. The processor cards are used for hologram computation while the display video concentrator card acts as frame buffer for the system. The display video concentrator also formats the computed holographic data and converts them to analog form for feeding the acousto-optic modulators of the Media Lab's Mark-II holographic display system. The display video concentrator card can display the computed holograms from the Chidi cards loaded from its high-speed I/O interface port or precomputed holograms loaded from a PC through the United Serial Bus port of its communications processor at above video refresh rates. This paper discusses the design of the display video concentrator used to display holographic video in the Mark-II system.

Nwodoh, Thomas A.; Benton, Stephen A.

2000-03-01

161

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

162

Design of a Facility to Test the Advanced Stirling Radioisotope Generator Engineering Unit  

NASA Technical Reports Server (NTRS)

The Advanced Stirling Radioisotope Generator (ASRG) is being considered to power deep space missions. An engineering unit, the ASRG-EU, was designed and fabricated by Lockheed Martin under contract to the Department of Energy. This unit is currently on an extended operation test at NASA Glenn Research Center to generate performance data and validate the life and reliability predictions for the generator and the Stirling convertors. A special test facility was designed and built for testing the ASRG-EU. Details of the test facility design are discussed. The facility can operate the convertors under AC bus control or with the ASRG-EU controller. It can regulate input thermal power in either a fixed temperature or fixed power mode. An enclosure circulates cooled air around the ASRG-EU to remove heat rejected from the ASRG-EU by convection. A custom monitoring and data acquisition system supports the test. Various safety features, which allow 2417 unattended operation, are discussed.

Lewandowski, Edward J.; Schreiber, Jeffrey G.; Oriti, Salvatore M.; Meer, David W.; Brace, Michael H.; Dugala, Gina

2009-01-01

163

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

164

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

165

TOWARDS THE NEXT GENERATION OF VIDEO AND IMAGE QUALITY METRICS: IMPACT OF DISPLAY, RESOLUTION, CONTENT AND VISUAL ATTENTION IN  

E-print Network

ABSTRACT Two decades of research in video and image quality assessment has led to the design of subjective the perceived quality of images, would be a great improvement in quality assessment field. Best examples of the research effort on quality assessment relies in the ITU recommendations and VQEG activities. A part

Boyer, Edmond

166

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

167

Advanced Seal Technology Role in Meeting Next Generation Turbine Engine Goals  

NASA Technical Reports Server (NTRS)

Cycle studies have shown the benefits of increasing engine pressure ratios and cycle temperatures to decrease engine weight and improve performance in next generation turbine engines. Advanced seals have been identified as critical in meeting engine goals for specific fuel consumption, thrust-to-weight, emissions, durability and operating costs. NASA and the industry are identifying and developing engine and sealing technologies that will result in dramatic improvements and address the goals for engines entering service in the 2005-2007 time frame. This paper provides an overview of advanced seal technology requirements and highlights the results of a preliminary design effort to implement advanced seals into a regional aircraft turbine engine. This study examines in great detail the benefits of applying advanced seals in the high pressure turbine region of the engine. Low leakage film-riding seals can cut in half the estimated 4% cycle air currently used to purge the high pressure turbine cavities. These savings can be applied in one of several ways. Holding rotor inlet temperature (RIT) constant the engine specific fuel consumption can be reduced 0.9%, or thrust could be increased 2.5%, or mission fuel burn could be reduced 1.3%. Alternatively, RIT could be lowered 20 'F resulting in a 50% increase in turbine blade life reducing overall regional aircraft maintenance and fuel bum direct operating costs by nearly 1%. Thermal, structural, secondary-air systems, safety (seal failure and effect), and emissions analyses have shown the proposed design is feasible.

Steinetz, Bruce M.; Hendricks, Robert C.; Munson, John

1999-01-01

168

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

169

Space-time video montage  

E-print Network

Conventional video summarization methods focus predominantly on summarizing videos along the time axis, such as building a movie trailer. The resulting video trailer tends to retain much empty space in the background of the video frames while discarding much informative video content due to size limit. In this paper, we propose a novel spacetime video summarization method which we call space-time video montage. The method simultaneously analyzes both the spatial and temporal information distribution in a video sequence, and extracts the visually informative space-time portions of the input videos. The informative video portions are represented in volumetric layers. The layers are then packed together in a small output video volume such that the total amount of visual information in the video volume is maximized. To achieve the packing process, we develop a new algorithm based upon the first-fit and Graph cut optimization techniques. Since our method is able to cut off spatially and temporally less informative portions, it is able to generate much more compact yet highly informative output videos. The effectiveness of our method is validated by extensive experiments over a wide variety of videos. 1.

Hong-wen Kang; Yasuyuki Matsushita; Xiaoou Tang; Xue-quan Chen; Hefei P. R. China

2006-01-01

170

Advancing small-molecule-based chemical biology with next-generation sequencing technologies.  

PubMed

Next-generation-sequencing (NGS) technologies enable us to obtain extensive information by deciphering millions of individual DNA sequencing reactions simultaneously. The new DNA-sequencing strategies exceed their precursors in output by many orders of magnitude, resulting in a quantitative increase in valuable sequence information that could be harnessed for qualitative analysis. Sequencing on this scale has facilitated significant advances in diverse disciplines, ranging from the discovery, design, and evaluation of many small molecules and relevant biological mechanisms to maturation of personalized therapies. NGS technologies that have recently become affordable allow us to gain in-depth insight into small-molecule-triggered biological phenomena and empower researchers to develop advanced versions of small molecules. In this review we focus on the overlooked implications of NGS technologies in chemical biology, with a special emphasis on small-molecule development and screening. PMID:25421391

Anandhakumar, Chandran; Kizaki, Seiichiro; Bando, Toshikazu; Pandian, Ganesh N; Sugiyama, Hiroshi

2015-01-01

171

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

172

Next Generation Risk Assessment: Incorporation of Recent Advances in Molecular, Computational, and Systems Biology (External Review Draft)  

EPA Science Inventory

EPA is releasing a draft report "Next Generation Risk Assessment: Incorporation of Recent Advances in Molecular, Computational, and Systems Biology" that explores how new molecular, computational and systems biology data and approaches (together called "NexGen") could better info...

173

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

174

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

175

Advanced properties of extended plasmas for efficient high-order harmonic generation  

SciTech Connect

We demonstrate the advanced properties of extended plasma plumes (5?mm) for efficient harmonic generation of laser radiation compared with the short lengths of plasmas (?0.3–0.5?mm) used in previous studies. The harmonic conversion efficiency quadratically increased with the growth of plasma length. The studies of this process along the whole extreme ultraviolet range using the long plasma jets produced on various metal surfaces, particularly including the resonance-enhanced laser frequency conversion and two-color pump, are presented. Such plasmas could be used for the quasi-phase matching experiments by proper modulation of the spatial characteristics of extended ablating area and formation of separated plasma jets.

Ganeev, R. A. [Ophthalmology and Advanced Laser Medical Center, Saitama Medical University, Saitama 350-0495 (Japan) [Ophthalmology and Advanced Laser Medical Center, Saitama Medical University, Saitama 350-0495 (Japan); Physics Department, Voronezh State University, Voronezh 394006 (Russian Federation); Suzuki, M.; Kuroda, H. [Ophthalmology and Advanced Laser Medical Center, Saitama Medical University, Saitama 350-0495 (Japan)] [Ophthalmology and Advanced Laser Medical Center, Saitama Medical University, Saitama 350-0495 (Japan)

2014-05-15

176

Application of the Advanced Communications Technology Satellite to teleradiology and real-time compressed ultrasound video telemedicine  

Microsoft Academic Search

The authors have investigated the application of the NASA Advanced Communications Technology Satellite (ACTS) to teleradiology\\u000a and telemedicine using the Jet Propulsion Laboratory (JPL)-developed ACTS Mobile Terminal (AMT) uplink. In this experiment,\\u000a bidirectional 128, 256, and 384 kbps satellite links were established between the ACTS\\/AMT, the ACTS in geosynchronous orbit,\\u000a and the downlink terrestrial terminal at JPL. A terrestrial Integrated

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

1999-01-01

177

Scanned document compression using block-based hybrid video codec.  

PubMed

This paper proposes a hybrid pattern matching/transform-based compression method for scanned documents. The idea is to use regular video interframe prediction as a pattern matching algorithm that can be applied to document coding. We show that this interpretation may generate residual data that can be efficiently compressed by a transform-based encoder. The efficiency of this approach is demonstrated using H.264/advanced video coding (AVC) as a high-quality single and multipage document compressor. The proposed method, called advanced document coding (ADC), uses segments of the originally independent scanned pages of a document to create a video sequence, which is then encoded through regular H.264/AVC. The encoding performance is unrivaled. Results show that ADC outperforms AVC-I (H.264/AVC operating in pure intramode) and JPEG2000 by up to 2.7 and 6.2 dB, respectively. Superior subjective quality is also achieved. PMID:23481850

Zaghetto, Alexandre; de Queiroz, Ricardo L

2013-06-01

178

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

179

Video Analytics for Indexing, Summarization and Searching of Video Archives  

SciTech Connect

This paper will be submitted to the proceedings The Eleventh IASTED International Conference on. Signal and Image Processing. Given a video or video archive how does one effectively and quickly summarize, classify, and search the information contained within the data? This paper addresses these issues by describing a process for the automated generation of a table-of-contents and keyword, topic-based index tables that can be used to catalogue, summarize, and search large amounts of video data. Having the ability to index and search the information contained within the videos, beyond just metadata tags, provides a mechanism to extract and identify "useful" content from image and video data.

Trease, Harold E.; Trease, Lynn L.

2009-08-01

180

"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

181

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

182

Generation of short x-ray pulses using crab cavities at the Advanced Photon Source.  

SciTech Connect

There is growing interest within the user community to utilize the pulsed nature of synchrotron radiation from storage ring sources. Conventional third-generation light sources can provide pulses on the order of 100 ps but typically cannot provide pulses of about 1 ps that some users now require to advance their research programs. However, it was recently proposed by A. Zholents et al. to use rf orbit deflection to generate sub-ps x-ray pulses [1]. In this scheme, two crab cavities are used to deliver a longitudinally dependent vertical kick to the beam, thus exciting longitudinally correlated vertical motion of the electrons. This makes it possible to spatially separate the radiation coming from different longitudinal parts of the beam. An optical slit can then be used to slice out a short part of the radiation pulse, or an asymmetrically cut crystal can be used to compress the radiation in time. In this paper we present a feasibility study of this method applied to the Advanced Photon Source (APS). We find that the pulse length can be decreased down to a 1 ps range using superconducting crab cavities.

Harkay, K.; Borland, M.; Chae, Y.-C.; Decker, G.; Dejus, R.; Emery, L.; Guo, W.; Horan, D.; Kim, K.-J.; Kustom, R.; Mills, D.; Milton, S.; Moog, E.; Nassiri, A.; Pile, G.; Sajaev, V.; Shastri, S.; Waldschmidt, G.; White, M.; Yang, B.; Zholents, A.; LBNL

2005-01-01

183

Video document  

NASA Astrophysics Data System (ADS)

The metaphor of film and TV permeates the design of software to support video on the PC. Simply transplanting the non- interactive, sequential experience of film to the PC fails to exploit the virtues of the new context. Video ont eh PC should be interactive and non-sequential. This paper experiments with a variety of tools for using video on the PC that exploits the new content of the PC. Some feature are more successful than others. Applications that use these tools are explored, including primarily the home video archive but also streaming video servers on the Internet. The ability to browse, edit, abstract and index large volumes of video content such as home video and corporate video is a problem without appropriate solution in today's market. The current tools available are complex, unfriendly video editors, requiring hours of work to prepare a short home video, far more work that a typical home user can be expected to provide. Our proposed solution treats video like a text document, providing functionality similar to a text editor. Users can browse, interact, edit and compose one or more video sequences with the same ease and convenience as handling text documents. With this level of text-like composition, we call what is normally a sequential medium a 'video document'. An important component of the proposed solution is shot detection, the ability to detect when a short started or stopped. When combined with a spreadsheet of key frames, the host become a grid of pictures that can be manipulated and viewed in the same way that a spreadsheet can be edited. Multiple video documents may be viewed, joined, manipulated, and seamlessly played back. Abstracts of unedited video content can be produce automatically to create novel video content for export to other venues. Edited and raw video content can be published to the net or burned to a CD-ROM with a self-installing viewer for Windows 98 and Windows NT 4.0.

Davies, Bob; Lienhart, Rainer W.; Yeo, Boon-Lock

1999-08-01

184

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

185

The Next Generation Nuclear Plant/Advanced Gas Reactor Fuel Irradiation Experiments in the Advanced Test Reactor  

SciTech Connect

The United States Department of Energy’s Next Generation Nuclear Plant (NGNP) Program will be irradiating eight separate low enriched uranium (LEU) tri-isotopic (TRISO) particle fuel (in compact form) 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 irradiations and fuel development are being accomplished to support development of the next generation reactors in the United States, and will be irradiated over the next ten years to demonstrate and qualify new particle fuel for use in high temperature gas reactors. The goals of the irradiation experiments are to provide irradiation performance data to support fuel process development, to qualify fuel for normal operating conditions, to support development and validation of fuel performance and fission product transport models and codes, and to provide irradiated fuel and materials for post irradiation examination (PIE) and safety testing. The experiments, which will each consist of at least six separate capsules, will be irradiated in an inert sweep gas atmosphere with individual on-line temperature monitoring and control of each capsule. The sweep gas will also have on-line fission product monitoring on its effluent to track performance of the fuel in each individual capsule during irradiation. The first experiment (designated AGR-1) started irradiation in December 2006, and the second experiment (AGR-2) is currently in the design phase. The design of test trains, as well as the support systems and fission product monitoring system that will monitor and control the experiment during irradiation will be discussed. In addition, the purpose and differences between the two experiments will be compared and the irradiation results to date on the first experiment will be presented.

S. Blaine Grover

2009-09-01

186

Packetized video on MAGNET  

NASA Astrophysics Data System (ADS)

Theoretical analysis of an ILAN model of MAGNET, an integrated network testbed developed at Columbia University, shows that the bandwidth freed up by video and voice calls during periods of little movement in the images and silence periods in the speech signals could be utilized efficiently for graphics and data transmission. Based on these investigations, an architecture supporting adaptive protocols that are dynamically controlled by the requirements of a fluctuating load and changing user environment has been advanced. To further analyze the behavior of the network, a real-time packetized video system has been implemented. This system is embedded in the real time multimedia workstation EDDY that integrates video, voice and data traffic flows. Protocols supporting variable bandwidth, constant quality packetized video transport are descibed in detail.

Lazar, Aurel A.; White, John S.

1986-11-01

187

Packetized Video On MAGNET  

NASA Astrophysics Data System (ADS)

Theoretical analysis of integrated local area network model of MAGNET, an integrated network testbed developed at Columbia University, shows that the bandwidth freed up during video and voice calls during periods of little movement in the images and periods of silence in the speech signals could be utilized efficiently for graphics and data transmission. Based on these investigations, an architecture supporting adaptive protocols that are dynamicaly controlled by the requirements of a fluctuating load and changing user environment has been advanced. To further analyze the behavior of the network, a real-time packetized video system has been implemented. This system is embedded in the real-time multimedia workstation EDDY, which integrates video, voice, and data traffic flows. Protocols supporting variable-bandwidth, fixed-quality packetized video transport are described in detail.

Lazar, Aurel A.; White, John S.

1987-07-01

188

Virtual Space Camp Video Game  

NASA Astrophysics Data System (ADS)

With advances in computers, graphics, and especially video games, manned space exploration can become real, by creating a safe, fun learning environment that allows players to explore the solar system from the comfort of their personal computers.

Speyerer, E. J.; Ferrari, K. A.; Lowes, L. L.; Raad, P. E.; Cuevas, T.; Purdy, J. A.

2006-03-01

189

Advanced Microsensors  

NASA Technical Reports Server (NTRS)

This video looks at a spinoff application of the technology from advanced microsensors -- those that monitor and determine conditions of spacecraft like the Space Shuttle. The application featured is concerned with the monitoring of the health of premature babies.

1991-01-01

190

Video preprocessing for audiovisual indexing Alberto Albiol  

E-print Network

Video preprocessing for audiovisual indexing Alberto Albiol Communications Department Polytechnic are provided which prove the validity of the approach. 1. Introduction Recent advances in digital video coding and retrieve information from these databases. Audio and video indexing play a key role in this process

Torres, Luis

191

VIDEO PREPROCESSING FOR AUDIOVISUAL INDEXING Alberto Albiol  

E-print Network

VIDEO PREPROCESSING FOR AUDIOVISUAL INDEXING Alberto Albiol Politechnic University of Valencia. INTRODUCTION Recent advances in digital video coding have enabled the creation of a big number of digital to access and retrieve the digital data. Au- dio and video indexing play a key role in this process

Torres, Luis

192

Skin Paths for Contextual Flagging Adult Videos  

Microsoft Academic Search

User generated video content has become increasingly popular, with a large number of internet video sharing portals appearing.\\u000a Many portals wish to rapidly find and remove objectionable material from the uploaded videos. This paper considers the flagging\\u000a of uploaded videos as potentially objectionable due to sexual content of an adult nature. Such videos are often characterized\\u000a by the presence of

Julian Stöttinger; Allan Hanbury; Christian Liensberger; Rehanullah Khan

2009-01-01

193

Semantic Analysis for Topical Segmentation of Videos  

Microsoft Academic Search

Topic segmentation of videos enables topic-based categorization, retrieval and browsing and also facilitates efficient video authoring. Existing video topic segmentation techniques, however, are domain specific to news or narrative videos while generic approaches based on video shot analysis generate too fine-grained micro-segments. This paper addresses this challenge through a multi-modal semantic analysis technique for recognizing topical segments. We analyze the

Ying Li

2007-01-01

194

An assessment of ocean thermal energy conversion as an advanced electric generation methodology  

NASA Astrophysics Data System (ADS)

Ocean thermal energy conversion (OTEC) is a process that employs the temperature difference between surface and deep ocean water to alternately evaporate and condense a working fluid. In the open-cycle OTEC configuration, the working fluid is seawater. In the closed-cycle configuration, a working fluid such as propane is used. In this paper, OTEC is assessed for its practical merits for electric power generation, and the history of the process is reviewed. Because the OTEC principle operates under a small net temperature difference regime, rather large amounts of seawater and working fluid are required. The energy requirements for pumping these fluids may be greater than the energy recovered from the OTEC engine itself. The concept of net power production is discussed. The components of a typical OTEC plant are discussed with emphasis on the evaporator heat exchanger. Operation of an OTEC electric generating station is discussed, including transient operation. Perhaps the most encouraging aspect of OTEC is the recent experiments and efforts at the Natural Energy Laboratory in Hawaii, which are discussed in the paper. Remarks are made on bottlenecks and the future of OTEC as an advanced electric generation methodology.

Heydt, Gerald T.

1993-03-01

195

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

196

Ionic carbamate photoacid/photobase generators for the advancement of dual-tone photolithography  

NASA Astrophysics Data System (ADS)

Current work in lithographic patterning has been carried out using 193 nm excitation sources, limiting the pitch division to approximately ?/2 and, thus, the advancement of Moore's law. Recently, double patterning has emerged as a potential extension of 193 nm techniques as two lines can be patterned in one exposure. In this contribution, the double patterning features of single component carbamate photoacid/photobase generators (PAG/PBG) are examined. At lower exposure doses, sulfonic acid is generated, while at higher doses, a photochemical rearrangement is initiated to activate the PBG. Optimally, at intermediate doses, photoacid and photobase components can exist concurrently resulting in the desired dual tone lithographic features. The energy required to initiate dual tone behavior can be tailored through co-added amine quenchers and carbamate concentration. Using ellipsometry, the energy required for the resists to have the first sign of photoacid generation (film dissolution), E0, and at the energy required for photobase activation (En) were determined, as this value dictates the ability to achieve the desired pitch division.

Hallett-Tapley, Geniece L.; Wee, Tse-Luen; Eldo, Joby; Jackson, Edward A.; Blackwell, James M.; Scaiano, Juan C.

2012-03-01

197

Advanced Stirling Radioisotope Generator Thermal Power Model in Thermal Desktop SINDA/FLUINT Analyzer  

NASA Technical Reports Server (NTRS)

This paper presents a three-dimensional Advanced Stirling Radioisotope Generator (ASRG) thermal power model that was built using the Thermal Desktop SINDA/FLUINT thermal analyzer. The model was correlated with ASRG engineering unit (EU) test data and ASRG flight unit predictions from Lockheed Martin's Ideas TMG thermal model. ASRG performance under (1) ASC hot-end temperatures, (2) ambient temperatures, and (3) years of mission for the general purpose heat source fuel decay was predicted using this model for the flight unit. The results were compared with those reported by Lockheed Martin and showed good agreement. In addition, the model was used to study the performance of the ASRG flight unit for operations on the ground and on the surface of Titan, and the concept of using gold film to reduce thermal loss through insulation was investigated.

Wang, Xiao-Yen; Fabanich, William A.; Schmitz, Paul C.

2012-01-01

198

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

199

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

200

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

201

Advanced nebulizer designs employing vibrating mesh/aperture plate technologies for aerosol generation.  

PubMed

Recent technological advances and improved nebulizer designs have overcome many limitations of jet nebulizers. Newer devices employ a vibrating mesh or aperture plate (VM/AP) for the generation of therapeutic aerosols with consistent, increased efficiency, predominant aerosol fine particle fractions, low residuals, and the ability to nebulize even microliter volumes. These enhancements are achieved through several different design features and include improvements that promote patient compliance, such as compact design, portability, shorter treatment durations, and quiet operation. Current VM/AP devices in clinical use are the Omron MicroAir, the Nektar Aeroneb, and the Pari eFlow. However, some devices are only approved for use with specific medications. Development of "smart nebulizers" such as the Respironics I-neb couple VM technologies with coordinated delivery and optimized inhalation patterns to enhance inhaled drug delivery of specialized, expensive formulations. Ongoing development of advanced aerosol technologies should improve clinical outcomes and continue to expand therapeutic options as newer inhaled drugs become available. PMID:18393813

Waldrep, J C; Dhand, R

2008-04-01

202

Ranger© - An Affordable, Advanced, Next-Generation, Dual-Pol, X-Band Weather Radar  

NASA Astrophysics Data System (ADS)

The Enterprise Electronics Corporation (EEC) Ranger© system is a new generation, X-band (3 cm), Adaptive Polarization Doppler Weather Surveillance Radar that fills the gap between high-cost, high-power traditional radar systems and the passive ground station weather sensors. Developed in partnership with the University of Oklahoma Advanced Radar Research Center (ARRC), the system uses relatively low power solid-state transmitters and pulse compression technology to attain nearly the same performance capabilities of much more expensive traditional radar systems. The Ranger© also employs Adaptive Dual Polarization (ADP) techniques to allow Alternating or Simultaneous Dual Polarization capability with total control over the transmission polarization state using dual independent coherent transmitters. Ranger© has been designed using the very latest technology available in the industry and the technical and manufacturing experience gained through over four decades of successful radar system design and production at EEC. The entire Ranger© design concept emphasizes precision, stability, reliability, and value using proven solid state technology combined with the most advanced motion control system ever conceived for weather radar. Key applications include meteorology, hydrology, aviation, offshore oil/gas drilling, wind energy, and outdoor event situational awareness.

Stedronsky, Richard

2014-05-01

203

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

204

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

205

Balancing usability and security in a video CAPTCHA  

Microsoft Academic Search

We present a technique for using content-based video labeling as a CAPTCHA task. Our CAPTCHAs are generated from YouTube videos, which contain labels (tags) supplied by the person that up- loaded the video. They are graded using a video's tags, as well as tags from related videos. In a user study involving 184 partici- pants, we were able to increase

Kurt Alfred Kluever; Richard Zanibbi

2009-01-01

206

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

207

DSC-HDTV video decoder system  

SciTech Connect

Zenith and AT&T developed the Digital Spectrum Compatible high-definition television (HDTV) system for evaluation by the US FCC Advanced Television Test Center. The system, specifically designed to minimize consumer receiver cost, uses a video decoder subsystem to decode the digital video bit stream and reconstruct video fields. Two new VLSI devices implement this video decoder in a cost-effective manner. We comment on the architecture and hardware complexity of these devices. 5 refs., 7 figs.

Duardo, O.; Knauer, S.C.; Mailhot, J.N.; Mondal, K.; Poon, T.C. [AT& T Bell Laboratories, Murry Hill, NJ (United States)] [AT& T Bell Laboratories, Murry Hill, NJ (United States)

1992-10-01

208

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

209

Informative-frame filtering in endoscopy videos  

NASA Astrophysics Data System (ADS)

Advances in video technology are being incorporated into today"s healthcare practice. For example, colonoscopy is an important screening tool for colorectal cancer. Colonoscopy allows for the inspection of the entire colon and provides the ability to perform a number of therapeutic operations during a single procedure. During a colonoscopic procedure, a tiny video camera at the tip of the endoscope generates a video signal of the internal mucosa of the colon. The video data are displayed on a monitor for real-time analysis by the endoscopist. Other endoscopic procedures include upper gastrointestinal endoscopy, enteroscopy, bronchoscopy, cystoscopy, and laparoscopy. However, a significant number of out-of-focus frames are included in this type of videos since current endoscopes are equipped with a single, wide-angle lens that cannot be focused. The out-of-focus frames do not hold any useful information. To reduce the burdens of the further processes such as computer-aided image processing or human expert"s examinations, these frames need to be removed. We call an out-of-focus frame as non-informative frame and an in-focus frame as informative frame. We propose a new technique to classify the video frames into two classes, informative and non-informative frames using a combination of Discrete Fourier Transform (DFT), Texture Analysis, and K-Means Clustering. The proposed technique can evaluate the frames without any reference image, and does not need any predefined threshold value. Our experimental studies indicate that it achieves over 96% of four different performance metrics (i.e. precision, sensitivity, specificity, and accuracy).

An, Yong Hwan; Hwang, Sae; Oh, JungHwan; Lee, JeongKyu; Tavanapong, Wallapak; de Groen, Piet C.; Wong, Johnny

2005-04-01

210

Natural Convection Cooling of the Advanced Stirling Radioisotope Generator Engineering Unit  

NASA Technical Reports Server (NTRS)

After fueling and prior to launch, the Advanced Stirling Radioisotope Generator (ASRG) will be stored for a period of time then moved to the launch pad for integration with the space probe and mounting on the launch vehicle. During this time, which could be as long as 3 years, the ASRG will operate continuously with heat rejected from the housing and fins. Typically, the generator will be cooled by forced convection using fans. During some of the ground operations, maintaining forced convection may add significant complexity, so allowing natural convection may simplify operations. A test was conducted on the ASRG Engineering Unit (EU) to quantify temperatures and operating parameters with natural convection only and determine if the EU could be safely operated in such an environment. The results show that with natural convection cooling the ASRG EU Stirling convertor pressure vessel temperatures and other parameters had significant margins while the EU was operated for several days in this configuration. Additionally, an update is provided on ASRG EU testing at NASA Glenn Research Center, where the ASRG EU has operated for over 16,000 hr and underwent extensive testing.

Lewandowski, Edward J.; Hill, Dennis

2011-01-01

211

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

NASA Astrophysics Data System (ADS)

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. To inform curriculum designers about the process of data generation and its relation to the understanding of patterns as these may arise from graphs, this 5-year ethnographic study in one advanced research laboratory was designed to investigate how natural scientists make decisions about the inclusion/exclusion of certain measurements in/from their data sources. The study shows that scientists exclude measurements from their data sources even before attempting to mathematize and interpret the data. The excluded measurements therefore never even enter the ground from and against which the scientific phenomenon emerges and therefore remain invisible to it. I conclude by encouraging science educators to squarely address this aspect of the discovery sciences in their teaching, which has both methodological and ethical implications.

Roth, Wolff-Michael

2013-08-01

212

Next Generation Climate Change Experiments Needed to Advance Knowledge and for Assessment of CMIP6  

SciTech Connect

The Aspen Global Change Institute hosted a technical science workshop entitled, “Next generation climate change experiments needed to advance knowledge and for assessment of CMIP6,” on August 4-9, 2013 in Aspen, CO. Jerry Meehl (NCAR), Richard Moss (PNNL), and Karl Taylor (LLNL) served as co-chairs for the workshop which included the participation of 32 scientists representing most of the major climate modeling centers for a total of 160 participant days. In August 2013, AGCI gathered a high level meeting of representatives from major climate modeling centers around the world to assess achievements and lessons learned from the most recent generation of coordinated modeling experiments known as the Coupled Model Intercomparison Project – 5 (CMIP5) as well as to scope out the science questions and coordination structure desired for the next anticipated phase of modeling experiments called CMIP6. The workshop allowed for reflection on the coordination of the CMIP5 process as well as intercomparison of model results, such as were assessed in the most recent IPCC 5th Assessment Report, Working Group 1. For example, this slide from Masahiro Watanabe examines performance on a range of models capturing Atlantic Meridional Overturning Circulation (AMOC).

Katzenberger, John [AGCI; Arnott, James [AGCI; Wright, Alyson [AGCI

2014-10-30

213

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

214

The three-dimensional Multi-Block Advanced Grid Generation System (3DMAGGS)  

NASA Technical Reports Server (NTRS)

As the size and complexity of three dimensional volume grids increases, there is a growing need for fast and efficient 3D volumetric elliptic grid solvers. Present day solvers are limited by computational speed and do not have all the capabilities such as interior volume grid clustering control, viscous grid clustering at the wall of a configuration, truncation error limiters, and convergence optimization residing in one code. A new volume grid generator, 3DMAGGS (Three-Dimensional Multi-Block Advanced Grid Generation System), which is based on the 3DGRAPE code, has evolved to meet these needs. This is a manual for the usage of 3DMAGGS and contains five sections, including the motivations and usage, a GRIDGEN interface, a grid quality analysis tool, a sample case for verifying correct operation of the code, and a comparison to both 3DGRAPE and GRIDGEN3D. Since it was derived from 3DGRAPE, this technical memorandum should be used in conjunction with the 3DGRAPE manual (NASA TM-102224).

Alter, Stephen J.; Weilmuenster, Kenneth J.

1993-01-01

215

A Metric for Continuous Quality Evaluation of Compressed Video With Severe Distortions  

E-print Network

avail- able and vision research has advanced, quality metrics have become increas- ingly basedA Metric for Continuous Quality Evaluation of Compressed Video With Severe Distortions Mark A 14853 Abstract An objective quality metric that generates continuous estimates of perceived quality

Hemami, Sheila S.

216

Structured Video: A Data Type with Content-Based Access  

E-print Network

Structured Video: A Data Type with Content-Based Access Andrzej Duday Ron Weiss September 1993 MIT or implied, of the Defense Advanced Research Projects Agency or the U.S. Government. #12;Keywords: video indexing and searching, video databases, content- based retrieval, video algebra #12;Abstract We describe

Gifford, David K.

217

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.

218

Manipulation and Compositing of MC-DCT Compressed Video  

Microsoft Academic Search

Many advanced video applications require manipulations of compressed video signals. Popular video manipulation functions include overlap (opaque or semi-transparent), translation, scaling, linear filtering, rotation, and pixel multiplication. In this paper, we propose algorithms to manipulate compressed video in the compressed domain. Specifically, we focus on compression algorithms using the Discrete Cosine Transform (DCT) with or without Motion Compensation (MC). Compression

Shih-fu Chang; David G. Messersc

1994-01-01

219

Manipulation and Compositing of MC-DCT Compressed Video  

Microsoft Academic Search

Abstract Many advanced video applications require manipulations of compressed video signals Popular video manipula - tion functions include overlap (opaque or semi - transparent), translation, scaling, linear filtering, rotation, and pixel multiplication In this paper, we propose algorithms to manipulate compressed video in the compressed domain Specifically , we focus on compression algorithms using the Discrete Cosine Transform (DCT) with

Shih-fu Chang; David G. Messerschmitt

1995-01-01

220

Asynchronous Video Coding for Wireless Transport * David G. Messerschmitt  

E-print Network

Asynchronous Video Coding for Wireless Transport * David G. Messerschmitt Fellow IEEE EECS by the Advanced Research Projects Agency Contract J-FBI-93-153, Tektronix, the University of California MICRO such as video, voice, and audio is becoming increasingly prevalent. Interactive video services such as video

Messerschmitt, David G.

221

A computer-aided telescope pointing system utilizing a video star tracker  

NASA Technical Reports Server (NTRS)

The Video Inertial Pointing (VIP) System is being developed to satisfy the acquisition and pointing requirements of astronomical telescopes. VIP employs a single video sensor to generate three-axis pointing error signals and to provide inputs for a cathode ray tube (CRT) display of the star field. The pointing error signals update the telescope's gyro stabilization system. The CRT display facilitates target acquisition and positioning of the telescope by a remote operator. The present paper describes the analysis, simulation, and hardware development of a prototype, advanced VIP system. An early model of the system utilizing a silicon-intensified target vidicon camera has flown on a balloon-borne telescope and is briefly described. The advanced system, which can employ either a vidicon camera or a charge-coupled device video sensor, has been tested using an analog/digital hybrid simulation. The advanced VIP hardware is described, and the simulation results presented.

Lorell, K. R.; Murphy, J. P.; Swift, C. D.

1976-01-01

222

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

223

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

224

Final LDRD report : advanced materials for next generation high-efficiency thermochemistry.  

SciTech Connect

Despite rapid progress, solar thermochemistry remains high risk; improvements in both active materials and reactor systems are needed. This claim is supported by studies conducted both prior to and as part of this project. Materials offer a particular large opportunity space as, until recently, very little effort apart from basic thermodynamic analysis was extended towards understanding this most fundamental component of a metal oxide thermochemical cycle. Without this knowledge, system design was hampered, but more importantly, advances in these crucial materials were rare and resulted more from intuition rather than detailed insight. As a result, only two basic families of potentially viable solid materials have been widely considered, each of which has significant challenges. Recent efforts towards applying an increased level of scientific rigor to the study of thermochemical materials have provided a much needed framework and insights toward developing the next generation of highly improved thermochemically active materials. The primary goal of this project was to apply this hard-won knowledge to rapidly advance the field of thermochemistry to produce a material within 2 years that is capable of yielding CO from CO2 at a 12.5 % reactor efficiency. Three principal approaches spanning a range of risk and potential rewards were pursued: modification of known materials, structuring known materials, and identifying/developing new materials for the application. A newly developed best-of-class material produces more fuel (9x more H2, 6x more CO) under milder conditions than the previous state of the art. Analyses of thermochemical reactor and system efficiencies and economics were performed and a new hybrid concept was reported. The larger case for solar fuels was also further refined and documented.

Ambrosini, Andrea; Miller, James Edward; Allendorf, Mark D. [Sandia National Laboratories, Livermore, CA; Coker, Eric Nicholas; Ermanoski, Ivan; Hogan, Roy E.,; McDaniel, Anthony H. [Sandia National Laboratories, Livermore, CA

2014-01-01

225

Energy and Distortion Analysis of Video Compression Schemes for Wireless Video Sensor  

E-print Network

video frames. The battery powered sensor nodes have limited hardware resources while video processing Video Sensor Networks (WVSNs), Energy efficiency. I. INTRODUCTION With rapid advancement in Micro. It is important to note that sensor nodes are battery powered devices and are often deployed in the environments

Reiterer, Harald

226

Adaptive Foveation of MPEG Video  

Microsoft Academic Search

We report experiments on the ‘foveation’ of MPEGstandard video by a network-based rate adaptor. The rat e adaptor is controlled by input from receiving users, and constrained by the capacity of each receiver’s channel. It generates versions of the input video which trade off spatial and temporal resolution in different regions of the picture. While there are many possible ways

T. H. Reeves; John A. Robinson

1996-01-01

227

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

228

Training Videos  

NSDL National Science Digital Library

The National Center for Case Study Teaching in Science has produced two videos that demonstrate how to teach science in a meaningful way using case studies in classroom discussions and small group learning. Both videos demonstrate how to effectively involve students in the learning process. They show real classes in action.

2010-01-01

229

System-Level Testing of the Advanced Stirling Radioisotope Generator Engineering Hardware  

NASA Technical Reports Server (NTRS)

To support future NASA deep space missions, a radioisotope power system utilizing Stirling power conversion technology was under development. This development effort was performed under the joint sponsorship of the Department of Energy and NASA, until its termination at the end of 2013 due to budget constraints. The higher conversion efficiency of the Stirling cycle compared with that of the Radioisotope Thermoelectric Generators (RTGs) used in previous missions (Viking, Pioneer, Voyager, Galileo, Ulysses, Cassini, Pluto New Horizons and Mars Science Laboratory) offers the advantage of a four-fold reduction in Pu-238 fuel, thereby extending its limited domestic supply. As part of closeout activities, system-level testing of flight-like Advanced Stirling Convertors (ASCs) with a flight-like ASC Controller Unit (ACU) was performed in February 2014. This hardware is the most representative of the flight design tested to date. The test fully demonstrates the following ACU and system functionality: system startup; ASC control and operation at nominal and worst-case operating conditions; power rectification; DC output power management throughout nominal and out-of-range host voltage levels; ACU fault management, and system command / telemetry via MIL-STD 1553 bus. This testing shows the viability of such a system for future deep space missions and bolsters confidence in the maturity of the flight design.

Chan, Jack; Wiser, Jack; Brown, Greg; Florin, Dominic; Oriti, Salvatore M.

2014-01-01

230

Development of an advanced mobile base for personal mobility and manipulation appliance generation II robotic wheelchair  

PubMed Central

Background This paper describes the development of a mobile base for the Personal Mobility and Manipulation Appliance Generation II (PerMMA Gen II robotic wheelchair), an obstacle-climbing wheelchair able to move in structured and unstructured environments, and to climb over curbs as high as 8 inches. The mechanical, electrical, and software systems of the mobile base are presented in detail, and similar devices such as the iBOT mobility system, TopChair, and 6X6 Explorer are described. Findings The mobile base of PerMMA Gen II has two operating modes: “advanced driving mode” on flat and uneven terrain, and “automatic climbing mode” during stair climbing. The different operating modes are triggered either by local and dynamic conditions or by external commands from users. A step-climbing sequence, up to 0.2 m, is under development and to be evaluated via simulation. The mathematical model of the mobile base is introduced. A feedback and a feed-forward controller have been developed to maintain the posture of the passenger when driving over uneven surfaces or slopes. The effectiveness of the controller has been evaluated by simulation using the open dynamics engine tool. Conclusion Future work for PerMMA Gen II mobile base is implementation of the simulation and control on a real system and evaluation of the system via further experimental tests. PMID:23820149

Wang, Hongwu; Candiotti, Jorge; Shino, Motoki; Chung, Cheng-Shiu; Grindle, Garrett G.; Ding, Dan; Cooper, Rory A.

2013-01-01

231

Indianapolis I3: the third generation Integrated Advanced Information Management Systems.  

PubMed

In 2001, the Regenstrief Institute for Health Care and the Indiana University School of Medicine (IUSM) began an IAIMS planning effort to create a vision and a tactical plan for the first Integrated Advanced Information Management Systems (IAIMS) implementation to cross a large area and include unaffiliated institutions. A number of elements made this planning effort unique. Among these elements were the existence of a network infrastructure that supported the Indianapolis Network for Patient Care, the existence of a mature medical informatics program at the Regenstrief Institute, and the existence of a wide-area knowledge network fostered by the IUSM libraries. However, the leadership for a strong information technology role in the IUSM that could promote collaboration in support of education and research across the diverse Indianapolis hospital systems had been lacking. By bringing together various groups, each with a commitment to improve health care quality and public health across the Indianapolis metropolitan area, regardless of individual institutional affiliation, the strategic directions for I3-Indianapolis IAIMS Initiative have been defined and the foundations for a third generation IAIMS construct have been laid in Indianapolis, Indiana. PMID:15098046

McGowan, Julie J; Overhage, J Marc; Barnes, Mike; McDonald, Clement J

2004-04-01

232

Nanoscale surface analysis on second generation advanced high strength steel after hot dip galvanizing.  

PubMed

Second generation advanced high strength steel is one promising material of choice for modern automotive structural parts because of its outstanding maximal elongation and tensile strength. Nonetheless there is still a lack of corrosion protection for this material due to the fact that cost efficient hot dip galvanizing cannot be applied. The reason for the insufficient coatability with zinc is found in the segregation of manganese to the surface during annealing and the formation of manganese oxides prior coating. This work analyses the structure and chemical composition of the surface oxides on so called nano-TWIP (twinning induced plasticity) steel on the nanoscopic scale after hot dip galvanizing in a simulator with employed analytical methods comprising scanning Auger electron spectroscopy (SAES), energy dispersive X-ray spectroscopy (EDX), and focused ion beam (FIB) for cross section preparation. By the combination of these methods, it was possible to obtain detailed chemical images serving a better understanding which processes exactly occur on the surface of this novel kind of steel and how to promote in the future for this material system galvanic protection. PMID:23404132

Arndt, M; Duchoslav, J; Preis, K; Samek, L; Stifter, D

2013-09-01

233

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

234

Watermarking of free-view video.  

PubMed

With the advances in image based rendering (IBR) in recent years, generation of a realistic arbitrary view of a scene from a number of original views has become cheaper and faster. One of the main applications of this progress has emerged as free-view TV(FTV), where TV-viewers select freely the viewing position and angle via IBR on the transmitted multiview video. Noting that the TV-viewer might record a personal video for this arbitrarily selected view and misuse this content, it is apparent that copyright and copy protection problems also exist and should be solved for FTV. In this paper, we focus on this newly emerged problem by proposing a watermarking method for free-view video. The watermark is embedded into every frame of multiple views by exploiting the spatial masking properties of the human visual system. Assuming that the position and rotation of the virtual camera is known, the proposed method extracts the watermark successfully from an arbitrarily generated virtual image. In order to extend the method for the case of an unknown virtual camera position and rotation, the transformations on the watermark pattern due to image based rendering operations are analyzed. Based upon this analysis, camera position and homography estimation methods are proposed for the virtual camera. The encouraging simulation results promise not only a novel method, but also a new direction for watermarking research. PMID:20215072

Koz, Alper; Cigla, Cevahir; Alatan, A Aydin

2010-07-01

235

Secure authenticated video equipment  

SciTech Connect

In the verification technology arena, there is a pressing need for surveillance and monitoring equipment that produces authentic, verifiable records of observed activities. Such a record provides the inspecting party with confidence that observed activities occurred as recorded, without undetected tampering or spoofing having taken place. The secure authenticated video equipment (SAVE) system provides an authenticated series of video images of an observed activity. Being self-contained and portable, it can be installed as a stand-alone surveillance system or used in conjunction with existing monitoring equipment in a non-invasive manner. Security is provided by a tamper-proof camera enclosure containing a private, electronic authentication key. Video data is transferred communication link consisting of a coaxial cable, fiber-optic link or other similar media. A video review station, located remotely from the camera, receives, validates, displays and stores the incoming data. Video data is validated within the review station using a public key, a copy of which is held by authorized panics. This scheme allows the holder of the public key to verify the authenticity of the recorded video data but precludes undetectable modification of the data generated by the tamper-protected private authentication key.

Doren, N.E.

1993-07-01

236

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

237

User's guide to PMESH: A grid-generation program for single-rotation and counterrotation advanced turboprops  

NASA Technical Reports Server (NTRS)

A detailed operating manual is presented for a grid generating program that produces 3-D meshes for advanced turboprops. The code uses both algebraic and elliptic partial differential equation methods to generate single rotation and counterrotation, H or C type meshes for the z - r planes and H type for the z - theta planes. The code allows easy specification of geometrical constraints (such as blade angle, location of bounding surfaces, etc.), mesh control parameters (point distribution near blades and nacelle, number of grid points desired, etc.), and it has good runtime diagnostics. An overview is provided of the mesh generation procedure, sample input dataset with detailed explanation of all input, and example meshes.

Warsi, Saif A.

1989-01-01

238

Video Production For Short Educational Videos  

E-print Network

Video Production Handbook For Short Educational Videos Jennifer Cook Small Acreage Management page 6 Introduction page 3 Prepare for Video Shoot page 8 Video Shoot page 9 Editing Page 11 Draft Review page 12 Final Video page 13 Table of Contents Video Production Process #12;3 Equipment

239

Color Helmet Mounted Display System with Real Time Computer Generated and Video Imagery for In-Flight Simulation  

NASA Technical Reports Server (NTRS)

NASA Ames Research Center and the US Army are developing the Rotorcraft Aircrew Systems Concepts Airborne Laboratory (RASCAL) using a Sikorsky UH-60 helicopter for the purpose of flight systems research. A primary use of the RASCAL is in-flight simulation for which the visual scene will use computer generated imagery and synthetic vision. This research is made possible in part to a full color wide field of view Helmet Mounted Display (HMD) system that provides high performance color imagery suitable for daytime operations in a flight-rated package. This paper describes the design and performance characteristics of the HMD system. Emphasis is placed on the design specifications, testing, and integration into the aircraft of Kaiser Electronics' RASCAL HMD system that was designed and built under contract for NASA. The optical performance and design of the Helmet mounted display unit will be discussed as well as the unique capabilities provided by the system's Programmable Display Generator (PDG).

Sawyer, Kevin; Jacobsen, Robert; Aiken, Edwin W. (Technical Monitor)

1995-01-01

240

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

241

An HEVC compressed domain content-based video signature for copy detection and video retrieval  

NASA Astrophysics Data System (ADS)

Video sharing platforms and social networks have been growing very rapidly for the past few years. The rapid increase in the amount of video content introduces many challenges in terms of copyright violation detection and video search and retrieval. Generating and matching content-based video signatures, or fingerprints, is an effective method to detect copies or "near-duplicate" videos. Video signatures should be robust to changes in the video features used to characterize the signature caused by common signal processing operations. Recent work has focused on generating video signatures based on the uncompressed domain. However, decompression is a computationally intensive operation. In large video databases, it becomes advantageous to create robust signatures directly from the compressed domain. The High Efficiency Video Coding (HEVC) standard has been recently ratified as the latest video coding standard and wide spread adoption is anticipated. We propose a method in which a content-based video signature is generated directly from the HEVC-coded bitstream. Motion vectors from the HEVC-coded bitstream are used as the features. A robust hashing function based on projection on random matrices is used to generate the hashing bits. A sequence of these bits serves as the signature for the video. Our experimental results show that our proposed method generates a signature robust to common signal processing techniques such as resolution scaling, brightness scaling and compression.

Tahboub, Khalid; Gadgil, Neeraj J.; Comer, Mary L.; Delp, Edward J.

2014-03-01

242

Magnetic Braking: A Video Analysis  

NASA Astrophysics Data System (ADS)

This paper presents a laboratory exercise that introduces students to the use of video analysis software and the Lenz's law demonstration. Digital techniques have proved to be very useful for the understanding of physical concepts. In particular, the availability of affordable digital video offers students the opportunity to actively engage in kinematics in introductory-level physics.1,2 By using digital videos frame advance features and "marking" the position of a moving object in each frame, students are able to more precisely determine the position of an object at much smaller time increments than would be possible with common time devices. Once the student collects data consisting of positions and times, these values may be manipulated to determine velocity and acceleration. There are a variety of commercial and free applications that can be used for video analysis. Because the relevant technology has become inexpensive, video analysis has become a prevalent tool in introductory physics courses.

Molina-Bolívar, J. A.; Abella-Palacios, A. J.

2012-10-01

243

SCME Videos by Students  

NSDL National Science Digital Library

The Southwest Center for Microsystems Education is a Regional Advanced Technology Education Center funded in part by the National Science Foundation. This page contains a collection of videos made by students on MEMS related topics. The topics include a virtual cleanroom tour, gowning procedures, and using personal protective equipment. Visitors are encouraged to create an account and login in order to access the full set of resources.

2011-10-11

244

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

245

Concurrent CO2 Control and O2 Generation for Advanced Life Support  

NASA Technical Reports Server (NTRS)

The electrochemical reduction of carbon dioxide (CO2) using ceramic oxygen generators (COGs) is well known and widely studied, however, conventional devices using yttria-stabilized zirconia (YSZ) electrolytes operate at temperatures greater than 700 C. Operating at such high temperatures increases system mass compared to lower temperature systems because of increased energy overhead to get the COG up to operating temperature and the need for heavier insulation and/or heat exchangers to reduce the COG oxygen (O2) output temperature for comfortable inhalation. Recently, the University of Florida developed novel ceramic oxygen generators employing a bilayer electrolyte of gadolinia-doped ceria and erbia-stabilized bismuth for NASA's future exploration of Mars. To reduce landed mass and operation expenditures during the mission, in-situ resource utilization was proposed using these COGs to obtain both lifesupporting oxygen and oxidant/propellant fuel, by converting CO2 from the Mars atmosphere. 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 was an issue. The strategy proposed for CO2 removal for advanced life support systems employs a catalytic layer combined with a COG so that it is reduced all the way to solid carbon and oxygen. Hence, a three-phased approach was used for the development of a viable low weight COG for CO2 removal. First, to reduce the COG operating temperature a high oxide ion conductivity electrolyte was developed. Second, to promote full CO2 reduction while avoiding the problem of carbon deposition on the COG cathode, novel cathodes and a removable catalytic carbon deposition layer were designed. Third, to improve efficiency, a pre-stage for CO2 absorption was used to concentrate CO2 from the exhalate before sending it to the COG. These subsystems were then integrated into a single CO2 removal system. This paper describes our progress to date on these tasks.

Paul, Heather L.; Duncan, Keith L.; Hagelin-Weaver, Helena E.; Bishop, Sean R.; Wachsman, Eric D.

2007-01-01

246

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

247

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

248

Video flowmeter  

DOEpatents

A video flowmeter is described that is capable of specifying flow nature and pattern and, at the same time, the quantitative value of the rate of volumetric flow. An image of a determinable volumetric region within a fluid containing entrained particles is formed and positioned by a rod optic lens assembly on the raster area of a low-light level television camera. The particles are illuminated by light transmitted through a bundle of glass fibers surrounding the rod optic lens assembly. Only particle images having speeds on the raster area below the raster line scanning speed may be used to form a video picture which is displayed on a video screen. The flowmeter is calibrated so that the locus of positions of origin of the video picture gives a determination of the volumetric flow rate of the fluid.

Lord, D.E.; Carter, G.W.; Petrini, R.R.

1981-06-10

249

Video flowmeter  

DOEpatents

A video flowmeter is described that is capable of specifying flow nature and pattern and, at the same time, the quantitative value of the rate of volumetric flow. An image of a determinable volumetric region within a fluid containing entrained particles is formed and positioned by a rod optic lens assembly on the raster area of a low-light level television camera. The particles are illuminated by light transmitted through a bundle of glass fibers surrounding the rod optic lens assembly. Only particle images having speeds on the raster area below the raster line scanning speed may be used to form a video picture which is displayed on a video screen. The flowmeter is calibrated so that the locus of positions of origin of the video picture gives a determination of the volumetric flow rate of the fluid. 4 figs.

Lord, D.E.; Carter, G.W.; Petrini, R.R.

1983-08-02

250

Video flowmeter  

DOEpatents

A video flowmeter is described that is capable of specifying flow nature and pattern and, at the same time, the quantitative value of the rate of volumetric flow. An image of a determinable volumetric region within a fluid (10) containing entrained particles (12) is formed and positioned by a rod optic lens assembly (31) on the raster area of a low-light level television camera (20). The particles (12) are illuminated by light transmitted through a bundle of glass fibers (32) surrounding the rod optic lens assembly (31). Only particle images having speeds on the raster area below the raster line scanning speed may be used to form a video picture which is displayed on a video screen (40). The flowmeter is calibrated so that the locus of positions of origin of the video picture gives a determination of the volumetric flow rate of the fluid (10).

Lord, David E. (Livermore, CA); Carter, Gary W. (Livermore, CA); Petrini, Richard R. (Livermore, CA)

1983-01-01

251

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.

US Department of Energy

252

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

253

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 macro-scale behavior, this paper addresses the complementary problem of synthesizing crowds with realistic micro-scale 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-satisyfing 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:23209047

Flagg, Matthew; Rehg, Jim

2012-11-29

254

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

255

Practical distributed video coding in packet lossy channels  

NASA Astrophysics Data System (ADS)

Improving error resilience of video communications over packet lossy channels is an important and tough task. We present a framework to optimize the quality of video communications based on distributed video coding (DVC) in practical packet lossy network scenarios. The peculiar characteristics of DVC indeed require a number of adaptations to take full advantage of its intrinsic robustness when dealing with data losses of typical real packet networks. This work proposes a new packetization scheme, an investigation of the best error-correcting codes to use in a noisy environment, a practical rate-allocation mechanism, which minimizes decoder feedback, and an improved side-information generation and reconstruction function. Performance comparisons are presented with respect to a conventional packet video communication using H.264/advanced video coding (AVC). Although currently the H.264/AVC rate-distortion performance in case of no loss is better than state-of-the-art DVC schemes, under practical packet lossy conditions, the proposed techniques provide better performance with respect to an H.264/AVC-based system, especially at high packet loss rates. Thus the error resilience of the proposed DVC scheme is superior to the one provided by H.264/AVC, especially in the case of transmission over packet lossy networks.

Qing, Linbo; Masala, Enrico; He, Xiaohai

2013-07-01

256

Robust Action Recognition via Borrowing Information Across Video Modalities.  

PubMed

The recent advances in imaging devices have opened the opportunity of better solving the tasks of video content analysis and understanding. Next-generation cameras, such as the depth or binocular cameras, capture diverse information, and complement the conventional 2D RGB cameras. Thus, investigating the yielded multimodal videos generally facilitates the accomplishment of related applications. However, the limitations of the emerging cameras, such as short effective distances, expensive costs, or long response time, degrade their applicability, and currently make these devices not online accessible in practical use. In this paper, we provide an alternative scenario to address this problem, and illustrate it with the task of recognizing human actions. In particular, we aim at improving the accuracy of action recognition in RGB videos with the aid of one additional RGB-D camera. Since RGB-D cameras, such as Kinect, are typically not applicable in a surveillance system due to its short effective distance, we instead offline collect a database, in which not only the RGB videos but also the depth maps and the skeleton data of actions are available jointly. The proposed approach can adapt the interdatabase variations, and activate the borrowing of visual knowledge across different video modalities. Each action to be recognized in RGB representation is then augmented with the borrowed depth and skeleton features. Our approach is comprehensively evaluated on five benchmark data sets of action recognition. The promising results manifest that the borrowed information leads to remarkable boost in recognition accuracy. PMID:25546860

Tang, Nick C; Lin, Yen-Yu; Hua, Ju-Hsuan; Wei, Shih-En; Weng, Ming-Fang; Liao, Hong-Yuan Mark

2015-02-01

257

A computer program for estimating the power-density spectrum of advanced continuous simulation language generated time histories  

NASA Technical Reports Server (NTRS)

A computer program for performing frequency analysis of time history data is presented. The program uses circular convolution and the fast Fourier transform to calculate power density spectrum (PDS) of time history data. The program interfaces with the advanced continuous simulation language (ACSL) so that a frequency analysis may be performed on ACSL generated simulation variables. An example of the calculation of the PDS of a Van de Pol oscillator is presented.

Dunn, H. J.

1981-01-01

258

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

259

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

260

Advanced concurrent engineering environment final report  

SciTech Connect

Sandia demonstrated large-scale visualization in a conference room environment. Project focused on the installation of hardware for visualization and display, and the integration of software tools for design and animation of 3-dimensional parts. Using a high-end visualization server, 3-dimensional modeling and animation software, and leading edge World Wide Web technology, and advanced concurrent engineering environment was simulated where a design team was able to work collectively, rather than as solely disjoint individual efforts. Finally, a successful animation of a Sandia part was demonstrated, and a computer video generated. This video is now accessible on a Sandia internal web server.

Jortner, J.N.; Friesen, J.A.; Schwegel, J.

1997-08-01

261

Advanced concurrent-engineering environment. Final report  

SciTech Connect

Sandia demonstrated large-scale visualization in a conference room environment. Project focused in the installation of hardware for visualization and display, and the integration of software tools for design and animation of 3-dimensional parts. Using a high-end visualization server, 3-dimensional modeling and animation software, and leading edge World Wide Web technology, an advanced concurrent engineering environment was simulated where a design team was able to work collectively, rather than as solely disjoint individual efforts. Finally, a successful animation of a Sandia part was demonstrated, and a computer video generated. This video is now accessible on a Sandia internal web server.

Jortner, J.N.; Friesen, J.A.

1997-07-01

262

Advanced Digital Video and the National Information Infrastructure. Report of the Information Infrastructure Task Force, Committee on Applications and Technology, Technology Policy Working Group. Draft for Public Comment.  

ERIC Educational Resources Information Center

The National Information Infrastructure (NII) vision encompasses an infrastructure providing seamless, interactive, user driven access to the widest range of information. Video will play a key role in distribution of educational information, government data, manufacturing information, and access to health care data and services. The Technology…

Office of Science and Technology Policy, Washington, DC.

263

Issues in satellite packet video communication  

Microsoft Academic Search

Recent advances in packet communication over satellite links make it now possible, for the first time, to seriously consider the application of this technology to real-time video transmission. Unfortunately, packet communication over satellite links poses several severe problems for real-time video applications: the data rate available on packet satellite links is usually below what is required for real-time video applications;

S. L. Casner; D. Cohen; E. R. Cole

1983-01-01

264

Advanced microwave modeling framework exploiting automatic model generation, knowledge neural networks, and space mapping  

Microsoft Academic Search

In this paper, we propose an efficient knowledge-based automatic model generation (KAMG) technique aimed at generating microwave neural models of the highest possible accuracy using the fewest accurate data. The technique is comprehensively derived to integrate three distinct powerful concepts, namely, automatic model generation, knowledge neural networks, and space mapping. For the first time, we simultaneously utilize two types of

Vijay K. Devabhaktuni; Biswarup Chattaraj; Mustapha C. E. Yagoub; Qi-Jun Zhang

2003-01-01

265

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.

266

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

267

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

268

Commercial Video Games in the Science Classroom  

ERIC Educational Resources Information Center

There's no denying that middle school students are interested in video games. With such motivation present, we as teachers should harness this media in a productive way in our classrooms. Students today are much more technologically advanced than ever before, and using video games is one more way to use something from their world as a teaching…

Angelone, Lauren

2010-01-01

269

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

270

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

271

Teaching Social Studies with Video Games  

ERIC Educational Resources Information Center

Today's youth have grown up immersed in technology and are increasingly relying on video games to solve problems, engage socially, and find entertainment. Yet research and vignettes of teachers actually using video games to advance student learning in social studies is scarce (Hutchinson 2007). This article showcases how social studies…

Maguth, Brad M.; List, Jonathan S.; Wunderle, Matthew

2015-01-01

272

Effect of video decoder errors on video interpretability  

NASA Astrophysics Data System (ADS)

The advancement in video compression technology can result in more sensitivity to bit errors. Bit errors can propagate causing sustained loss of interpretability. In the worst case, the decoder "freezes" until it can re-synchronize with the stream. Detection of artifacts enables downstream processes to avoid corrupted frames. A simple template approach to detect block stripes and a more advanced cascade approach to detect compression artifacts was shown to correlate to the presence of artifacts and decoder messages.

Young, Darrell L.

2014-06-01

273

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

274

Video Understanding Francois BREMOND  

E-print Network

Video Understanding Francois BREMOND Orion team, INRIA Sophia Antipolis FRANCE Key words of video sequences video understanding= from people detection and tracking to behavior recognition (fighting) of crowds (overcrowding) interactions of people and vehicles (aircraft refueling) Video

Prié, Yannick

275

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

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

Video animation system  

SciTech Connect

A video animation system is being used at Sandia Laboratories in Albuquerque to record computer generated images directly onto 3/4'' videocassettes. The system serves as a quick turn around process for previewing sequences prior to sending them to a Dicomed film recorder. It is also used when videocassette is appropriate for final output. The video animation system in place at Sandia is described. The system consists of a medium resolution graphics display system, a 3/4'' professional quality videocassette recorder, and a controller that allows single frame recording of computer generated images to be performed under program control. Examples of output produced using this system are presented which will include animated sequences of scientific data produced by DISSPLA programs.

Mareda, J.

1985-01-01

278

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

279

An advanced electronic load governor for control of micro hydroelectric generation  

SciTech Connect

This paper describes the original research and development of an Electronic Load Governor which is microprocessor based and incorporates three-phase balancing. The combined study and testing of the transient behavior of the governor indicated the need for an improved control algorithm. The results of the implementation of the advanced algorithm are presented and compared with the original algorithm.

Henderson, D. [Napier Univ., Edinburgh (United Kingdom)] [Napier Univ., Edinburgh (United Kingdom)

1998-09-01

280

A Challenge towards Next-Generation Research Infrastructure for Advanced Life Science  

Microsoft Academic Search

Recently, life scientists have expressed a strong need for computational power sufficient to complete their analyses within a realistic time as well as for a computational power capable of seamlessly retrieving biological data of interest from multiple and diverse bio-related databases for their research infrastructure. This need implies that life science strongly requires the benefits of advanced IT. In Japan,

Haruki Nakamura; Susumu Date; Hideo Matsuda; Shinji Shimojo

2004-01-01

281

The mission of Sugarbeet Advancement is to generate research and utilize  

E-print Network

productivity and profitability of the Great Lakes sugar beet industry. This will be accomplished through by the Sugarbeet Advancement Committee. The ultimate goal is to improve the profitability of the sugar beet. which may affect the results are noted. Statistical analysis is done on most trials that calculates

282

The mission of Sugarbeet Advancement is to generate research and utilize  

E-print Network

the trial. No two sites are identical in regards to weather, pests, diseases, crop history, etc. Please use/acre average. Through research efforts targeting stand establishment, disease and pest control, nutrient Advancement efforts has enabled us to establish a wide range and number of trials. This year, more than 1

283

Advancing a Complex Systems Approach to Personalized Learning Communities: Bandwidth, Sightlines, and Teacher Generativity  

ERIC Educational Resources Information Center

Educational technologies have advanced one of the most important visions of educational reformers, to customize formal and informal learning to individuals. The application of a complex systems framework to the design of learning ecologies suggests that each of a series of ten desirable and malleable features stimulates or propels the other ten,…

Hamilton, Eric

2015-01-01

284

Video dithering  

E-print Network

Creating a traditional halftone. : : : : : : : : : : : : : : : : : : : : : : : 5 2 Image of artistic video dithering. : : : : : : : : : : : : : : : : : : : : : 10 3 Grid types. Rectangular (A) and Hexagonal (B). : : : : : : : : : : : : : 11 4 Equivalent... hexagonal grids. (A) Real hexagonal grid. (B) and (C) Fake hexagonal grids. : : : : : : : : : : : : : : : : : : : : : : : : : : : 12 5 Rectangular-hexagonal equivalent (A) dot image, (B) dot image placed in a rectangular region to create an illusion...

Yu, Jin Nah

2004-09-30

285

Music video reviews  

Microsoft Academic Search

The Kinks, ONE FOR THE ROAD Vestron Video 60 min. $29.95.Neil Diamond, LIVE AT THE GREEK. Vestron Video. 60 min. (HiFi)Video 45s XX½ Stray Cats. Sony Corp. Video 45. (13 min.)XXX David Bowie. Sony Corp. Video 45 (14 min.)Duran Duran. Sony Corp. Video 45 (11 min.)

R. Serge Denisoff

1983-01-01

286

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

287

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

SciTech Connect

The objectives of this report period were to continue the development of the Gas Generator design, to complete the hardware and ancillary hardware fabrication, and commence the Test Preparations for the testing of the non-polluting unique power turbine drive gas generator. Focus during this report period has been on testing the Gas Generator. 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. A substantial portion of this report period was devoted to Testing Preparations, i.e. test facility development, cold- flow testing, calibration testing, performing igniter ignition testing, and then commencement of the completely assembled Gas Generator Assembly Testing, in process at this writing.

Unknown

2001-10-30

288

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

SciTech Connect

The objectives of this report period were to complete the development of the Gas Generator design, which was done; fabricate and test of the non-polluting unique power turbine drive gas Gas Generator, which has been postponed. Focus during this report period has been to complete the brazing and bonding necessary to fabricate the Gas Generator hardware, continue making preparations for fabricating and testing the Gas Generator, and continuing the fabrication of the Gas Generator hardware and ancillary hardware in preparation for the test program. Fabrication is more than 95% complete and is expected to conclude in early May 2002. the test schedule was affected by relocation of the testing to another test supplier. The target test date for hot fire testing is now not earlier than June 15, 2002.

Unknown

2002-03-31

289

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

290

Next Generation Respiratory Viral Vaccine System: Advanced and Emerging Bioengineered Human Lung Epithelia Model (HLEM) Organoid Technology  

NASA Technical Reports Server (NTRS)

Acute respiratory infections, including pneumonia and influenza, are the S t" leading cause of United States and worldwide deaths. Newly emerging pathogens signaled the need for an advanced generation of vaccine technology.. Human bronchial-tracheal epithelial tissue was bioengineered to detect, identify, host and study the pathogenesis of acute respiratory viral disease. The 3-dimensional (3D) human lung epithelio-mesechymal tissue-like assemblies (HLEM TLAs) share characteristics with human respiratory epithelium: tight junctions, desmosomes, microvilli, functional markers villin, keratins and production of tissue mucin. Respiratory Syntial Virus (RSV) studies demonstrate viral growth kinetics and membrane bound glycoproteins up to day 20 post infection in the human lung-orgainoid infected cell system. Peak replication of RSV occurred on day 10 at 7 log10 particles forming units per ml/day. HLEM is an advanced virus vaccine model and biosentinel system for emergent viral infectious diseases to support DoD global surveillance and military readiness.

Goodwin, Thomas J.; Schneider, Sandra L.; MacIntosh, Victor; Gibbons, Thomas F.

2010-01-01

291

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

292

Video as a format in health information.  

PubMed

Video is a medium that has passed through a progression of technical advances including the invention of videotape, the incremental refinements to laser videodisc technologies, and the arrival of digital imaging technologies such as CD-ROM, DVD, and the Web's video streaming. Today, video is firmly established as a convenient and effective medium for conveying medical information. One result of these developments is that medical reference librarians can expect to encounter information requests and professional tasks that will require an understanding of these wide-ranging and differing video technologies. PMID:12238014

Crow, Suzanne; Ondrusek, Anita

2002-01-01

293

Advanced control for power density maximization of the brushless DC generator  

E-print Network

hardware circuitry for sensing terminal voltages has been removed. Moreover, the proposed algorithm is very suitable for implementation in low-cost, fixed- point Digital Signal Processors (DSPs). A simulation model for the BLDC generator drive has been...-Fe-B SmCo5 AlNiCo Fig. 5. Characteristics of the common magnetic materials. C. Induced EMF of the BLDC Generator [10] In order to control electrical output power of a BLDC generator, it is essential to understand the characteristics of the induced...

Lee, Hyung-Woo

2005-02-17

294

High Pressure Materials Research using Advanced Third-Generation Synchrotron X-ray  

SciTech Connect

The recent discoveries of nonmolecular phases of simple molecular solids [1,2] demonstrate the proof-of-the-principles for producing exotic phases by application of high pressure. Modern advances in theoretical and computational methodologies now make possible to explain or even predict novel structures and properties in a relatively wide range of length scales on the basis of thermodynamic stability [3]. Equally important in materials research is the recent developments in advanced x-ray and laser diagnostics that enable in-situ observations at the formidable pressure-temperature conditions [4]. Having benefited by all these developments, we discuss the first principle of the pressure-induced chemistry, 'Mbar Chemistry', with a few examples that may have important implications in materials research.

Yoo, C S; Iota, V; Park, J; Lee, G; Evans, W; Jenei, Z; Cynn, H

2006-07-07

295

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

296

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

297

A 3rd Generation Advanced High-Strength Steel (AHSS) Produced by Dual Stabilization Heat Treatment (DSHT)  

NASA Astrophysics Data System (ADS)

A 3rd generation advanced high-strength steel containing, in wt pct, 0.3 C, 4.0 Mn, 1.5 Al, 2.1 Si, and 0.5 Cr has been produced using a dual stabilization heat treatment—a five stage thermal processing schedule compatible with continuous galvanized steel production. In excess of 30 vol pct retained austenite containing at least 0.80 wt pct C was achieved with this alloy, which had tensile strengths up to 1650 MPa and tensile elongations around 20 pct.

Qu, Hao; Michal, Gary M.; Heuer, Arthur H.

2013-10-01

298

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

299

Analysis of Advanced Fuel Assemblies and Core Designs for the Current and Next Generations of LWRs  

SciTech Connect

The objective of the project is to design and analyze advanced fuel assemblies for use in current and future light water reactors and to assess their ability to reduce the inventory of transuranic elements, while preserving operational safety. The reprocessing of spent nuclear fuel can delay or avoid the need for a second geological repository in the US. Current light water reactor fuel assembly designs under investigation could reduce the plutonium inventory of reprocessed fuel. Nevertheless, these designs are not effective in stabilizing or reducing the inventory of minor actinides. In the course of this project, we developed and analyzed advanced fuel assembly designs with improved thermal transmutation capability regarding transuranic elements and especially minor actinides. These designs will be intended for use in thermal spectrum (e.g., current and future fleet of light water reactors in the US). We investigated various fuel types, namely high burn-up advanced mixed oxides and inert matrix fuels, in various geometrical designs that are compliant with the core internals of current and future light water reactors. Neutronic/thermal hydraulic effects were included. Transmutation efficiency and safety parameters were used to rank and down-select the various designs.

Jean Ragusa; Karen Vierow

2011-09-01

300

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

301

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

302

Videos: Autism Spectrum Disorders Selected Videos  

E-print Network

Videos: Autism Spectrum Disorders Selected Videos http://www.ucdmc.ucdavis.edu/mindinstitute/videos/video_index.html A Community Forum: Autism Spectrum Disorders Presenters: David Amaral, Ph.D., Sally Rogers Ph.D., and Peter Cordova Unified School District Can We Identify and Treat Autism in Infancy? Presenter: Sally Rogers, Ph

Nguyen, Danh

303

Video Scene Segmentation Via Continuous Video Coherence  

E-print Network

Video Scene Segmentation Via Continuous Video Coherence John R. Kender Boon­Lock Yeo Dept 10027 Santa Clara, CA 95052 September 2, 1998 Abstract In extended video sequences, individual frames in this continuous measure permits robust and flexible segmentation of the video into scenes, without the necessity

Kender, John R.

304

Video / Audio Instructions: Sharp Video Data Projector;  

E-print Network

Room 259 Video / Audio Instructions: Sharp Video Data Projector; DVDIVCR; Wireless Microphone:/ /aok.lib.umbc.edu/reference/BI /roompol,php3 These instructions will allow you to operate the video and screen, standing behind the instructor's workstation; the video projector is located on the ceiling

Maryland, Baltimore County, University of

305

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

306

A video event trigger for high frame rate, high resolution video technology  

NASA Technical Reports Server (NTRS)

When video replaces film the digitized video data accumulates very rapidly, leading to a difficult and costly data storage problem. One solution exists for cases when the video images represent continuously repetitive 'static scenes' containing negligible activity, occasionally interrupted by short events of interest. Minutes or hours of redundant video frames can be ignored, and not stored, until activity begins. A new, highly parallel digital state machine generates a digital trigger signal at the onset of a video event. High capacity random access memory storage coupled with newly available fuzzy logic devices permits the monitoring of a video image stream for long term or short term changes caused by spatial translation, dilation, appearance, disappearance, or color change in a video object. Pretrigger and post-trigger storage techniques are then adaptable for archiving the digital stream from only the significant video images.

Williams, Glenn L.

1991-01-01

307

A video event trigger for high frame rate, high resolution video technology  

NASA Astrophysics Data System (ADS)

When video replaces film the digitized video data accumulates very rapidly, leading to a difficult and costly data storage problem. One solution exists for cases when the video images represent continuously repetitive 'static scenes' containing negligible activity, occasionally interrupted by short events of interest. Minutes or hours of redundant video frames can be ignored, and not stored, until activity begins. A new, highly parallel digital state machine generates a digital trigger signal at the onset of a video event. High capacity random access memory storage coupled with newly available fuzzy logic devices permits the monitoring of a video image stream for long term or short term changes caused by spatial translation, dilation, appearance, disappearance, or color change in a video object. Pretrigger and post-trigger storage techniques are then adaptable for archiving the digital stream from only the significant video images.

Williams, Glenn L.

1991-12-01

308

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

309

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

310

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

311

Behavior of vortices generated by an advancing ejecta curtain in theory, in the laboratory, and on Mars  

NASA Technical Reports Server (NTRS)

Several papers assess the interaction between an atmosphere and advancing ejecta to assess possible atmospheric processes affecting ejecta emplacement. Ejecta travel through an atmosphere in two modes: larger ejecta blocks follow ballistic trajectories unhindered by the atmosphere; finer ejecta are entrained in a turbulent basal cloud, which develops as the advancing ejecta curtain generates strong atmospheric winds. Laboratory experiments reveal that this cloud of fine ejecta produce ramparts, flow lobes, or radial scouring that superposes larger ballistic ejecta emplaced earlier. Martian, Venusian, and terrestrial ejecta facies can be interpreted in terms of processes observed in the laboratory with appropriate first-order corrections for scaling. A continuum model of the atmospheric flow around an advancing inclined plate simulated and reproduced some of the complex flow patterns observed in front and at the top of the curtain. Here we consider improvements to the model to compare quantitatively the approximate position of ejecta deposition (i.e., run-out distance) with laboratory experiments and Martian ejecta facies.

Barnouin, O. S.; Schultz, P. H.

1993-01-01

312

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

313

Recent advancements in MCM-L imaging and via generation by laser direct writing  

Microsoft Academic Search

The paper presents some preliminary results and describes the state of a research project that aims at the improvement of the quality of MCM-L circuit boards by the application of UV lasers for the following processes. 1) Pattern generation by direct writing using Nd:YAG (IR, visible or UV) laser. The copper clad laminate is covered by some protective layer, and

Z. Illyefalvi-Vitez; M. Ruszinko; J. Pinkola

1998-01-01

314

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

315

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

316

Advanced voltage regulation method of power distribution systems interconnected with dispersed storage and generation systems  

Microsoft Academic Search

This paper deals with an issue of voltage regulation for power distribution systems interconnected with dispersed storage and generation (DSG) systems. Since DSGs within power distribution systems impact on the conventional voltage regulation method, there is a possibility that customers' voltages violate the permissible limits. A multiple line drop compensation (MLDC) voltage regulation method that determines tap positions of under-load

Joon-Ho Choi; Jae-Chul Kim

2001-01-01

317

Advanced voltage regulation method at the power distribution systems interconnected with dispersed storage and generation systems  

Microsoft Academic Search

DSGs (dispersed storage and generation systems) in power distribution systems impact on the conventional voltage regulation method. Therefore, there is a possibility that the customers' voltage will violate the permissible limits. In this paper, we propose the MLDC (multiple line drop compensation) voltage regulation method considering the unbalanced load diversity among feeders, the operations of DSGs, and the hysterical tap

Joon-Ho Choi; Jae-Chul Kim

2000-01-01

318

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

319

Real-time video-image analysis  

NASA Technical Reports Server (NTRS)

Digitizer and storage system allow rapid random access to video data by computer. RAPID (random-access picture digitizer) uses two commercially-available, charge-injection, solid-state TV cameras as sensors. It can continuously update its memory with each frame of video signal, or it can hold given frame in memory. In either mode, it generates composite video output signal representing digitized image in memory.

Eskenazi, R.; Rayfield, M. J.; Yakimovsky, Y.

1979-01-01

320

Accelerating YouTube with video correlation  

Microsoft Academic Search

In this paper, using long-term data traces, we present an in-depth measurement study on the characteristics of YouTube, the most successful site providing a new generation of short video sharing service. We find that YouTube videos have noticeable differences compared with traditional videos, making it difficult to use conventional strategies, such as peer-to-peer, to reduce the server workload. However, the

Xu Cheng; Jiangchuan Liu; Haiyang Wang

2009-01-01

321

Video image processing  

NASA Technical Reports Server (NTRS)

Current technology projections indicate a lack of availability of special purpose computing for Space Station applications. Potential functions for video image special purpose processing are being investigated, such as smoothing, enhancement, restoration and filtering, data compression, feature extraction, object detection and identification, pixel interpolation/extrapolation, spectral estimation and factorization, and vision synthesis. Also, architectural approaches are being identified and a conceptual design generated. Computationally simple algorithms will be research and their image/vision effectiveness determined. Suitable algorithms will be implimented into an overall architectural approach that will provide image/vision processing at video rates that are flexible, selectable, and programmable. Information is given in the form of charts, diagrams and outlines.

Murray, N. D.

1985-01-01

322

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

ERIC Educational Resources Information Center

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…

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

2013-01-01

323

Content-Based Indexing and Retrieval Using MPEG7 and XQuery in Video Data Management Systems  

Microsoft Academic Search

Current advances in multimedia technology enable ease of capturing and encoding digital video. As a result, video data is rapidly growing and becoming very important in our life. It is because video can transfer a large amount of knowledge by providing combination of text, graphics, or even images. Despite the vast growth of video, the effectiveness of its usage is

Dian Tjondronegoro; Yi-Ping Phoebe Chen

2002-01-01

324

Joint Texture and Depth Map Video Coding Based on the Scalable Extension of H.264/AVC  

E-print Network

Joint Texture and Depth Map Video Coding Based on the Scalable Extension of H.264/AVC Siping Tao1 video applications, both the texture video and its associated depth map are required for transmission.g. the Advanced Video Coding (H.264/AVC) standard, can be adopted to compress the depth map using the 4:0:0 chroma

Gabbouj, Moncef

325

Advanced controls for stability assessment of solar dynamics space power generation  

NASA Technical Reports Server (NTRS)

In support of the power requirements for the Space Station Alpha (SSA), a joint program by the U.S. and Russia for a permanently manned space station to be launched into orbit by 1998, a robust control scheme is needed to assure the stability of the rotating machines that will be integrated into the power subsystem. A framework design and systems studies for modeling and analysis is presented. It employs classical d-q axes machine model with voltage/frequency dependent loads. To guarantee that design requirements and necessary trade studies are done, a functional analysis tool CORE is used for the study. This provides us with different control options for stability assessment. Initial studies and recommendations using advanced simulation tools are also presented. The benefits of the stability/control scheme for evaluating future designs and power management are discussed.

Momoh, James A.; Anwah, Nnamdi A.

1995-01-01

326

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

327

Learning Video Preferences  

E-print Network

Learning Video Preferences Using Visual Features and Closed Captions Darin Brezeale University video than at any time in history. Sources of video include television broadcasts, movie theaters, movie rentals, video databases, and the Internet. While many videos come from the entertain- ment domain, other

Cook, Diane J.

328

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

329

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

Microsoft Academic Search

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

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

2007-01-01

330

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

SciTech Connect

The objectives of this report period were to continue and complete testing of the Gas Generator hardware, to complete and submit a Draft Final Report, and after incorporation of adjustments required, to then submit the Final Report. Focus during this report period was initially on testing the Gas Generator. While conducting scheduled full power tests of the Gas Generator at the facilities of the testing sub-contractor, National Testing Services [NTS], in Santa Clarita CA, anomalies in the performance of the Gas Generator were discovered. All testing was stopped on November 6, 2002. An expert team was formed to evaluate the anomalies and to recommend any appropriate corrective actions. After extensive analyses of the actual hardware, the test data acquired and recorded during testing, and a review of the test facilities and procedures, the Anomalies Review Team recommended that CES modify the combustion chamber front end cooling method and modify the configuration of the diluent injectors downstream of the combustion chamber, to eliminate the anomalies. At a review meeting convened in Sacramento CA on November 23, 2002, outside experts from the Lawrence Livermore National Laboratory, Air Liquide's Research Center in Chicago IL, and the California Energy Commission, confirmed that the expert team's assessed cause of the problem was the likely cause, and the recommended corrective actions were appropriate. Modified hardware drawings were produced in late November-early December 2002, hardware fabrication was begun in December, and was in process at the end of December. Also during December, the NTS test facility was being adjusted to take account of the modified hardware configuration being produced. All work was aimed toward realizing a schedule of resumed testing by mid-January for completion of tests by end of January or early February, 2003. Original objectives of the program remain in place and approximately ninety (90) percent of those objectives had been completed prior to discovery of the anomalies. The accomplished objectives to date are described in this report.

Stephen E. Doyle

2002-12-31

331

ADVANCED CONCEPTS: Generating monoenergetic proton beam by using circularly polarized laser  

NASA Astrophysics Data System (ADS)

The interaction of ultrashort intense circularly polarized laser with ultra thin overdense foil is studied by particle-in-cell simulation and analytic model. It is found that with the balance between pondermotive force and electrostatic force, highly quasi-monoenergetic proton beam can be generated by Phase Stable Acceleration (PSA) process. As in conventional accelerators, ion will be accelerated and bunched up in the longitudinal direction at the same time.

Liu, Bi-Cheng; Yan, Xue-Qing; Lin, Chen; Lu, Yuan-Rong; Guo, Zhi-Yu; Fang, Jia-Xun; Sheng, Zheng-Ming; Li, Yu-Tong; Chen, Jia-Er

2009-06-01

332

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

333

The 400Hz aircraft power-generation systems: Advancing the baseline  

Microsoft Academic Search

Today's benchmark system for the Boeing 757\\/767\\/A310 airplanes and future trends in hydromechanical aircraft power generating systems are discussed. The 757\\/767\\/A310 system represents the commercial state of the art and the direction in which Sundstrand Corp. is headed, particularly in regard to weight reduction. Sundstrand introduced microprocessor control in an in service system in the Boeing 767 and was the

T. Glennon

1983-01-01

334

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

335

Advanced feeder-free generation of induced pluripotent stem cells directly from blood cells.  

PubMed

Generation of validated human induced pluripotent stem cells (iPSCs) for biobanking is essential for exploring the full potential of iPSCs in disease modeling and drug discovery. Peripheral blood mononuclear cells (PBMCs) are attractive targets for reprogramming, because blood is collected by a routine clinical procedure and is a commonly stored material in biobanks. Generation of iPSCs from blood cells has previously been reported using integrative retroviruses, episomal Sendai viruses, and DNA plasmids. However, most of the published protocols require expansion and/or activation of a specific cell population from PBMCs. We have recently collected a PBMC cohort from the Finnish population containing more than 2,000 subjects. Here we report efficient generation of iPSCs directly from PBMCs in feeder-free conditions in approximately 2 weeks. The produced iPSC clones are pluripotent and transgene-free. Together, these properties make this novel method a powerful tool for large-scale reprogramming of PBMCs and for iPSC biobanking. PMID:25355732

Trokovic, Ras; Weltner, Jere; Nishimura, Ken; Ohtaka, Manami; Nakanishi, Mahito; Salomaa, Veikko; Jalanko, Anu; Otonkoski, Timo; Kyttälä, Aija

2014-12-01

336

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

337

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

338

The 400-Hz aircraft power-generation systems: Advancing the baseline  

NASA Technical Reports Server (NTRS)

Today's benchmark system for the Boeing 757/767/A310 airplanes and future trends in hydromechanical aircraft power generating systems are discussed. The 757/767/A310 system represents the commercial state of the art and the direction in which Sundstrand Corp. is headed, particularly in regard to weight reduction. Sundstrand introduced microprocessor control in an in service system in the Boeing 767 and was the first to use databus communications between the controls. Plans to develop this technology are briefly discussed. Alternative ways to produce and use power in aircraft are discussed. The integrated starter drive is discussed.

Glennon, T.

1983-01-01

339

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

340

Analytical procedures for estimating structural response to acoustic fields generated by advanced launch systems, phase 2  

NASA Technical Reports Server (NTRS)

This report supplements a previous report of the same title submitted in June, 1992. It summarizes additional analytical techniques which have been developed for predicting the response of linear and nonlinear structures to noise excitations generated by large propulsion power plants. The report is divided into nine chapters. The first two deal with incomplete knowledge of boundary conditions of engineering structures. The incomplete knowledge is characterized by a convex set, and its diagnosis is formulated as a multi-hypothesis discrete decision-making algorithm with attendant criteria of adaptive termination.

Elishakoff, Isaac; Lin, Y. K.; Zhu, Li-Ping; Fang, Jian-Jie; Cai, G. Q.

1994-01-01

341

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

342

Women, Video Gaming and Learning: Beyond Stereotypes  

ERIC Educational Resources Information Center

While video gaming has grown immensely as an industry over the last decade, with growing numbers of gamers around the globe, including women, gaming continues to be a very gendered practice. The apparent gender divide in video gaming has caught the attention of both the gaming industry and educators, generating considerable discussion and…

Hayes, Elisabeth

2005-01-01

343

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.

344

Applications study of advanced power generation systems utilizing coal-derived fuels. Volume 1: Executive summary  

NASA Astrophysics Data System (ADS)

The technology status of phosphoric acid and molten carbon fuel cells, combined gas and steam turbine cycles, and magnetohydrodynamic energy conversion systems was assessed and the power performance of these systems when operating with medium-Btu fuel gas whether delivered by pipeline to the power plant or in an integrated mode in which the coal gasification process and power system are closely coupled as an overall power plant was evaluated. Commercially available combined-cycle gas turbine systems can reach projected required performance levels for advanced systems using currently available technology. The phosphoric acid fuel cell appears to be the next most likely candidate for commercialization. On pipeline delivery, the systems efficiency ranges from 40.9% for the phosphoric acid fuel cell to 63% for the molten carbonate fuel cell system. The efficiencies of the integrated power plants vary from approximately 39-40% for the combined cycle to 46-47% for the molden carbonate fuel cell systems. Conventional coal-fired steam stations with flue-gas desulfurization have only 33-35% efficiency.

Robson, F. L.

1981-03-01

345

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

346

Video-enhanced light microscopy and its applications in cell biology.  

PubMed

The combination of novel optical microscopic techniques with advanced video and digital image-processing technology now permits dramatic improvements in the quality of light-microscope images. Such video-enhanced light microscopy has lead to a renaissance in the applications of the light microscope for the study of living cells in two important areas: the intensification of faint fluorescence images, permitting observation of fluorescently labelled cells under conditions of very low illuminating intensity; and the enhancement of extremely low contrast images generated by minute cellular structures, so that these may be clearly seen and their normal intracellular movements recorded. Application of both these aspects of video-enhanced light microscopy have recently led to major discoveries concerning the functioning of the living cell. In this review I discuss the equipment, procedures and image-processing principles employed in these applications, and describe and illustrate some of the spectacular results that have recently been obtained. PMID:3053738

Shotton, D M

1988-02-01

347

Diabetes Travel Tips Video  

MedlinePLUS

... 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 ...

348

Recent advances in the generation of bispecific antibodies for tumor immunotherapy.  

PubMed

Bispecific antibodies are currently in clinical and preclinical development for the treatment of various cancers. Designed to direct and enhance the body's immune response to specific tumors, bispecific antibodies consist of a targeting domain (typically an antibody fragment that binds to a tumor antigen) linked to a triggering arm that is specific for a cell-surface molecule capable of mediating a phagocytic or lytic response by macrophages, natural killer cells, T-cells, or other effector cells. Recent animal studies have confirmed the therapeutic potential of bispecific antibodies; however, results from clinical trials so far have been less promising and have revealed clear limitations of these molecules, such as immunogenicity and severe side effects caused by mass release of inflammatory cytokines. A second generation of bispecific molecules, bispecific single-chain antibodies and hetero-oligomeric-engineered antibodies, has now been produced by using DNA recombinant technology; these may theoretically improve tumor targeting and minimize side effects, eventually replacing the full-length bispecific antibodies. Over the next few years, several recombinant bispecific antibodies are expected to enter clinical trials and ultimately emerge as new pharmaceutical products. This review briefly summarizes major trends in the development of bispecific antibodies for tumor therapy, and describes a rationale for the generation of novel recombinant molecules. PMID:15603258

Kipriyanov, Sergey M; Le Gall, Fabrice

2004-03-01

349

Advancements and challenges in generating accurate animal models of gestational diabetes mellitus  

PubMed Central

The maintenance of glucose homeostasis during pregnancy is critical to the health and well-being of both the mother and the developing fetus. Strikingly, approximately 7% of human pregnancies are characterized by insufficient insulin production or signaling, resulting in gestational diabetes mellitus (GDM). In addition to the acute health concerns of hyperglycemia, women diagnosed with GDM during pregnancy have an increased incidence of complications during pregnancy as well as an increased risk of developing type 2 diabetes (T2D) later in life. Furthermore, children born to mothers diagnosed with GDM have increased incidence of perinatal complications, including hypoglycemia, respiratory distress syndrome, and macrosomia, as well as an increased risk of being obese or developing T2D as adults. No single environmental or genetic factor is solely responsible for the disease; instead, a variety of risk factors, including weight, ethnicity, genetics, and family history, contribute to the likelihood of developing GDM, making the generation of animal models that fully recapitulate the disease difficult. Here, we discuss and critique the various animal models that have been generated to better understand the etiology of diabetes during pregnancy and its physiological impacts on both the mother and the fetus. Strategies utilized are diverse in nature and include the use of surgical manipulation, pharmacological treatment, nutritional manipulation, and genetic approaches in a variety of animal models. Continued development of animal models of GDM is essential for understanding the consequences of this disease as well as providing insights into potential treatments and preventative measures. PMID:24085033

Pasek, Raymond C.

2013-01-01

350

Video Analysis and Trajectory Based Video Annotation System  

Microsoft Academic Search

During the last years, Automatic video analysis has become a very important research for video management, such as video index and video retrieval. The application domains are disparate, ranging from video surveillance to automatic video annotation for sport videos or TV shots. Whatever the application field, most of the works in video analysis are based on two main approaches: the

Yang Li; Yafei Zhang; Jianjiang Lu; Ran Lim; Jiabao Wang

2010-01-01

351

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

352

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

353

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

354

A rule-based expert system for generating control displays at the Advanced Photon Source  

SciTech Connect

The integration of a rule-based expert system for generating screen displays for controlling and monitoring instrumentation under the Experimental Physics and Industrial Control System (EPICS) is presented. The expert system is implemented using CLIPS, an expert system shell from the Software Technology Branch at Lyndon B. Johnson Space Center. The user selects the hardware input and output to be displayed and the expert system constructs a graphical control screen appropriate for the data. Such a system provides a method for implementing a common look and feel for displays created by several different users and reduces the amount of time required to create displays for new hardware configurations. Users are able to modify the displays as needed using the EPICS display editor tool.

Coulter, K.J.

1993-11-01

355

Advanced concepts: The second generation of compressed air-energy storage technology  

NASA Astrophysics Data System (ADS)

A description and assessment is provided for four second generation compressed air energy storage (CAES) concepts; abiabatic CAES, hybrid CAES, CAES with coal gasification (CG), and CAES with pressurized fluidized bed combustion (PFBC). These are based on information provided in conceptual design studies performed by Acres American, Inc., United Engineers and Constructors, and United Technologies Research Center. The assessment covers consideration of the technological readiness, relative economic benefits and operational viability of each concept. It was concluded that the adiabatic CAES concept appears to be the most attractive candidate for utility application in the near future. It is operationally viable, economically attractive compared with competing concepts, and will require relatively little additional development before commercialization. It was estimated that a utility could start the design of a commercial plant in 2 to 3 years if research regarding TES system design is undertaken in a timely manner.

Kannberg, L. D.

1981-09-01

356

Advances in understanding of the mechanism for generation of earthquake thermal precursors detected by satellites  

NASA Astrophysics Data System (ADS)

Stresses building up during an earthquake preparation phase also manifest themselves in the form of a so called increased land surface temperature (LST) leading to a thermal precursor prior to the earthquake event. This phenomenon has now been validated by our observations of short-term thermal anomalies detected by infrared satellite sensors for several recent past earthquakes around the world. The rise in infrared radiance temperature was seen to vary between 5 and 12 °C for different earthquakes. We discuss in this paper different explanations for the generation of such anomalies that have been offered. Emission of gases due to the opening and closure of micropores upon induced stresses and also the participation of ground water have been propounded as a possible cause for generation of thermal anomalies. Seismo-ionosphere coupling, by which gases like radon move to the earth-atmosphere interface and cause air ionization thus bringing about a change in air temperature, relative humidity, etc., has been put forth by some workers. A mechanism of low frequency electromagnetic emission was tested and experimented by scientists with rock masses in stressed conditions as those that exist at tectonic locations. The workers proposed the positive hole pair theory, which received support from several scientific groups. Positive holes (sites of electron deficiency) are activated in stressed rocks from pre-existing yet dormant positive hole pairs (PHPs) and their recombination at rock-air interface leads to a LST rise. A combination of remote sensing detection of rock mechanics behavior with a perception of chemistry and geophysics has been applied to propose the remote sensing rock mechanics theory. Remote sensing detections of such anomalies confirm so far proposed lab theories for such a hotly debated field as earthquake precursor study by providing unbiased observations with consistency in time and space distribution.

Saraf, Arun K.; Rawat, Vineeta; Choudhury, Swapnamita; Dasgupta, Sudipta; Das, Josodhir

2009-12-01

357

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

NASA Technical Reports Server (NTRS)

A high-efficiency, 110-We (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 We/kg. GRC has performed random vibration testing of a lower-power 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

358

Undertanding Brain Aneurysm Videos  

MedlinePLUS Videos and Cool Tools

BAF Publications Webinars Videos Articles Web Resources Books Publications on BAF Funded Research Projects Glossary GTranslate Educational Resources : Video Brain Aneurysm Symptoms - Early Detection of Brain Aneurysms ...

359

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

360

Hierarchical motion analysis for fast summarisation of scalable coded video  

Microsoft Academic Search

Due to a high demand for efficient video summarisation and video adaptation technologies, this paper focuses on utilisation of compressed domain feature extraction and hierarchical analysis of motion information in scalable video in order to generate intuitive visual summaries. By combining the analysis of inherently hierarchical motion activity measure and a fast geometrical curve simplification algorithm, a set of the

Marta Mrak; Janko Calic; Giovanni Cordara; Ahmet M. Kondoz

2008-01-01

361

Assessing the Components of Skill Necessary for Playing Video Games  

E-print Network

1 Assessing the Components of Skill Necessary for Playing Video Games Kent L. Norman Department that different video games require different skills. However, there has been no systematic way of assessing what of video games. Experienced gamers generated a list of 30 skills and then rated a number of games

Golbeck, Jennifer

362

Combined wavelet video coding and error control for internet streaming and multicast  

E-print Network

In the past several years, advances in Internet video streaming have been tremendous. Originally designed without error protection, Receiver-driven layered multicast (RLM) has proved to be a very effective scheme for scalable video multicast. Though...

Chu, Tianli

2002-01-01

363

Rheumatoid Arthritis Educational Video Series  

MedlinePLUS

... Rheumatoid Arthritis Educational Video Series Rheumatoid Arthritis Educational Video Series This series of five videos was designed ... Activity Role of Body Weight in Osteoarthritis Educational Videos for Patients Rheumatoid Arthritis Educational Video Series Psoriatic ...

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

Carbon dioxide capture and separation techniques for advanced power generation point sources  

SciTech Connect

The capture/separation step for carbon dioxide (CO2) from large-point sources is a critical one with respect to the technical feasibility and cost of the overall carbon sequestration scenario. For large-point sources, such as those found in power generation, the carbon dioxide capture techniques being investigated by the in-house research area of the National Energy Technology Laboratory possess the potential for improved efficiency and costs as compared to more conventional technologies. The investigated techniques can have wide applications, but the research has focused on capture/separation of carbon dioxide from flue gas (postcombustion from fossil fuel-fired combustors) and from fuel gas (precombustion, such as integrated gasification combined cycle – IGCC). With respect to fuel gas applications, novel concepts are being developed in wet scrubbing with physical absorption; chemical absorption with solid sorbents; and separation by membranes. In one concept, a wet scrubbing technique is being investigated that uses a physical solvent process to remove CO2 from fuel gas of an IGCC system at elevated temperature and pressure. The need to define an ideal solvent has led to the study of the solubility and mass transfer properties of various solvents. Fabrication techniques and mechanistic studies for hybrid membranes separating CO2 from the fuel gas produced by coal gasification are also being performed. Membranes that consist of CO2-philic silanes incorporated into an alumina support or ionic liquids encapsulated into a polymeric substrate have been investigated for permeability and selectivity. An overview of two novel techniques is presented along with a research progress status of each technology.

Pennline, H.W.; Luebke, D.R.; Morsi, B.I.; Heintz, Y.J.; Jones, K.L.; Ilconich, J.B.

2006-09-01

366

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

367

Video animation system operators manual  

SciTech Connect

This document describes the components necessary to put together a video animation system. It is primarily intended for use at Sandia National Laboratories as it describes the components used in systems at Sandia. The main document covers the operation of the equipment in some detail and is intended for either the system maintainer or an advanced user. There is an appendix for each of the three systems in use by the Engineering Sciences Directorate which contain instructions for the general user.

Mareda, J.F.

1992-09-01

368

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

369

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

370

Dynamic layout of visual summaries for scalable video  

Microsoft Academic Search

The paper brings a novel method for generating visual summaries of scalable videos. The generated summaries can dynamically adapt to requirements defined by display size, userpsilas needs or channel limitations. It utilises compressed domain features coupled with efficient contour evolution algorithm in order to generate a scale space of temporal video descriptors. The layout of the visual summary is created

J. Calic; M. Mrak; A. Kondoz

2008-01-01

371

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

372

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

373

Relevant Videos: Stoichiometry  

E-print Network

#12;2 of 8 Relevant Videos: Stoichiometry Stoichiometry: Limiting Reagent Suspensions, Colloids note that MANY of these Khan chemistry videos contain errors, although the basic premise and overall content is sound. If you find an error in a video, please email me the following information: video title

Houston, Paul L.

374

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

375

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

376

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

377

Video Digests: A Browsable, Skimmable Format for Informational Lecture Videos  

E-print Network

Video Digests: A Browsable, Skimmable Format for Informational Lecture Videos Amy Pavel, Colorado, and distance-learning videos online. However, it is difficult to browse and skim the content of such videos us- ing current timeline-based video players. Video digests are a new format for informational videos

Hartmann, Björn

378

Mobility Support of Multi-User Services in Next Generation Wireless Systems  

Microsoft Academic Search

The substantial advancement and proliferation of wireless technologies leads to the need to efficiently manage user mobility. Furthermore, the simultaneously emerging of services like video-conference, radio and TV has emphasized the importance to deliver content to several simultaneous receivers. This way, one of the key challenges to deploy multi-user services in the next generation wireless systems is the support of

Luis Veloso; Paulo Mendes; Edmundo Monteiro

2007-01-01

379

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

380

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

381

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

382

Beyond BRAF(V600): Clinical Mutation Panel Testing by Next-Generation Sequencing in Advanced Melanoma.  

PubMed

The management of melanoma has evolved owing to improved understanding of its molecular drivers. To augment the current understanding of the prevalence, patterns, and associations of mutations in this disease, the results of clinical testing of 699 advanced melanoma patients using a pan-cancer next-generation sequencing (NGS) panel of hotspot regions in 46 genes were reviewed. Mutations were identified in 43 of the 46 genes on the panel. The most common mutations were BRAF(V600) (36%), NRAS (21%), TP53 (16%), BRAF(Non-V600) (6%), and KIT (4%). Approximately one-third of melanomas had >1 mutation detected, and the number of mutations per tumor was associated with melanoma subtype. Concurrent TP53 mutations were the most frequent events in tumors with BRAF(V600)and NRAS mutations. Melanomas with BRAF(Non-V600)mutations frequently harbored concurrent NRAS mutations (18%), which were rare in tumors with BRAF(V600) mutations (1.6%). The prevalence of BRAF(V600) and KIT mutations were significantly associated with melanoma subtypes, and BRAF(V600) and TP53 mutations were significantly associated with cutaneous primary tumor location. Multiple potential therapeutic targets were identified in metastatic unknown primary and cutaneous melanomas that lacked BRAF(V600)and NRAS mutations. These results enrich our understanding of the patterns and clinical associations of oncogenic mutations in melanoma. PMID:25148578

Siroy, Alan E; Boland, Genevieve M; Milton, Denái R; Roszik, Jason; Frankian, Silva; Malke, Jared; Haydu, Lauren; Prieto, Victor G; Tetzlaff, Michael; Ivan, Doina; Wang, Wei-Lien; Torres-Cabala, Carlos; Curry, Jonathan; Roy-Chowdhuri, Sinchita; Broaddus, Russell; Rashid, Asif; Stewart, John; Gershenwald, Jeffrey E; Amaria, Rodabe N; Patel, Sapna P; Papadopoulos, Nicholas E; Bedikian, Agop; Hwu, Wen-Jen; Hwu, Patrick; Diab, Adi; Woodman, Scott E; Aldape, Kenneth D; Luthra, Rajyalakshmi; Patel, Keyur P; Shaw, Kenna R; Mills, Gordon B; Mendelsohn, John; Meric-Bernstam, Funda; Kim, Kevin B; Routbort, Mark J; Lazar, Alexander J; Davies, Michael A

2015-02-01

383

Comparison of Traffic and Quality Characteristics of Rate-Controlled Wavelet and DCT Video  

E-print Network

Comparison of Traffic and Quality Characteristics of Rate-Controlled Wavelet and DCT Video Beshan of wavelet encoded video against the widely used DCT-based MPEG encoded video. However, due to the lack similarity of the generated video traffic, which has not been studied before in the context of comparing DCT

Reisslein, Martin

384

Balancing Usability and Security in a Video CAPTCHA Kurt Alfred Kluever  

E-print Network

Balancing Usability and Security in a Video CAPTCHA Kurt Alfred Kluever Google, Inc. 1600@cs.rit.edu ABSTRACT We present a technique for using a content-based video labeling task as a CAPTCHA. Our video CAPTCHAs are generated from YouTube videos, which contain labels (tags) supplied by the per- son

Tomkins, Andrew

385

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

386

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

387

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

388

Video coding with dynamic background  

NASA Astrophysics Data System (ADS)

Motion estimation (ME) and motion compensation (MC) using variable block size, sub-pixel search, and multiple reference frames (MRFs) are the major reasons for improved coding performance of the H.264 video coding standard over other contemporary coding standards. The concept of MRFs is suitable for repetitive motion, uncovered background, non-integer pixel displacement, lighting change, etc. The requirement of index codes of the reference frames, computational time in ME & MC, and memory buffer for coded frames limits the number of reference frames used in practical applications. In typical video sequences, the previous frame is used as a reference frame with 68-92% of cases. In this article, we propose a new video coding method using a reference frame [i.e., the most common frame in scene (McFIS)] generated by dynamic background modeling. McFIS is more effective in terms of rate-distortion and computational time performance compared to the MRFs techniques. It has also inherent capability of scene change detection (SCD) for adaptive group of picture (GOP) size determination. As a result, we integrate SCD (for GOP determination) with reference frame generation. The experimental results show that the proposed coding scheme outperforms the H.264 video coding with five reference frames and the two relevant state-of-the-art algorithms by 0.5-2.0 dB with less computational time.

Paul, Manoranjan; Lin, Weisi; Lau, Chiew Tong; Lee, Bu-Sung

2013-12-01

389

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

390

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

391

User Manual 601 Digital Video  

E-print Network

User Manual TDS3SDI 601 Digital Video Application Module 071-0787-00 *P071078700* 071078700 #12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The 601 Digital Video Module 13. . . . . . . . . . . . . . . . . . 601 Digital Video Conventions 14. . . . . . . . . . . . . . . . . . Accessing 601 Digital Video Functions 15. . . . . . . . . . . Menu Changes 19

Kleinfeld, David

392

Performance evaluation of video on ethernet  

SciTech Connect

The purpose of this project was to determine the feasibility of using an ethernet local area network (LAN) to support videoconferencing connections between CAMEO Macintosh desktop videoconferencing systems. The specific goals were to: (1) to ensure that CAMEO video could be transported-without protocol modification-via existing ethernet networks, and would do so without ``bringing-down`` the network; (2) to measure the effect of CAMEO video connections on ethernet traffic; (3) to evaluate qualitatively how generated ethernet traffic effects the CAMEO video; and (4) to evaluate qualitatively how multiple CAMEO connections work between two routered ethernet networks via a backbone. High quality CAMEO video can be transported on an ethernet network and between routered networks, via a backbone. The number of simultaneous video connections possible on an ethernet segment would probably be less than 45, since each connection uses 2.2% of the network and errors increase rapidly as video connections are made. However, the actual number of simultaneous video connections possible will depend upon your network implementation and the amount of ``normal`` traffic present. The remainder of this report discusses the effect of CAMEO video on our networks.

Pihlman, M.; Farrell, R.

1993-08-01

393

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

394

Inland Treatment of the Brine Generated from Reverse Osmosis Advanced Membrane Wastewater Treatment Plant Using Epuvalisation System  

PubMed Central

The reverse osmosis (RO) brine generated from the Al-Quds University wastewater treatment plant was treated using an epuvalisation system. The advanced integrated wastewater treatment plant included an activated sludge unit, two consecutive ultrafiltration (UF) membrane filters (20 kD and 100 kD cutoffs) followed by an activated carbon filter and a reverse osmosis membrane. The epuvalisation system consisted of salt tolerant plants grown in hydroponic channels under continuous water flowing in a closed loop system, and placed in a greenhouse at Al-Quds University. Sweet basil (Ocimum basilicum) plants were selected, and underwent two consecutive hydroponic flowing stages using different brine-concentrations: an adaptation stage, in which a 1:1 mixture of brine and fresh water was used; followed by a functioning stage, with 100% brine. A control treatment using fresh water was included as well. The experiment started in April and ended in June (2012). At the end of the experiment, analysis of the effluent brine showed a remarkable decrease of electroconductivity (EC), PO43?, chemical oxygen demand (COD) and K+ with a reduction of 60%, 74%, 70%, and 60%, respectively, as compared to the influent. The effluent of the control treatment showed 50%, 63%, 46%, and 90% reduction for the same parameters as compared to the influent. Plant growth parameters (plant height, fresh and dry weight) showed no significant difference between fresh water and brine treatments. Obtained results suggest that the epuvalisation system is a promising technique for inland brine treatment with added benefits. The increasing of channel number or closed loop time is estimated for enhancing the treatment process and increasing the nutrient uptake. Nevertheless, the epuvalisation technique is considered to be simple, efficient and low cost for inland RO brine treatment. PMID:23823802

Qurie, Mohannad; Abbadi, Jehad; Scrano, Laura; Mecca, Gennaro; Bufo, Sabino A.; Khamis, Mustafa; Karaman, Rafik

2013-01-01

395

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

396

Video Resources Central Asia  

E-print Network

Video Resources Central Asia · Central Asia Country Overviews: https://archive.org/details/central-asia · Kyrgyzstan: Crisis in Kyrgyzstan: Fuel, Contracts, and Revolution along the Afghan Supply Chain http://www.c-span.org/video

Qian, Ning

397

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

398

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

399

Video Surveillance Unit  

SciTech Connect

The Video Surveillance Unit (VSU) has been designed to provide a flexible, easy to operate video surveillance and recording capability for permanent rack-mounted installations. The system consists of a single rack-mountable chassis and a camera enclosure. The chassis contains two 8 mm video recorders, a color monitor, system controller board, a video authentication verifier module (VAVM) and a universal power supply. A separate camera housing contains a solid state camera and a video authentication processor module (VAPM). Through changes in the firmware in the system, the recorders can be commanded to record at the same time, on alternate time cycle, or sequentially. Each recorder is capable of storing up to 26,000 scenes consisting of 6 to 8 video frames. The firmware can be changed to provide fewer recording with more frames per scene. The modular video authentication system provides verification of the integrity of the video transmission line between the camera and the recording chassis. 5 figs.

Martinez, R.L.; Johnson, C.S.

1990-01-01

400

Structured Video Computing  

Microsoft Academic Search

Video is becoming increasingly important for multimedia applications, but computers should let us do more than just watch.We propose a way for computers to structure video and several new interfaces that make it easier to browse and search.

Yoshinobu Tonomura; Akihito Akutsu; Yukinobu Tangiguchi; Gen Suzuki

1994-01-01

401

VISSTM: : A Video Intelligent Surveillance System  

NASA Astrophysics Data System (ADS)

Video surveillance is gaining increasing popularity as a possible response to various threats such as terrorism, vandalism and crime. The need for automated analysis of the events monitored by video cameras and support for fast search and browsing of such recorded video data is evident. In this paper we present VISSTM, a prototype system that uses advanced video segmentation and MPEG-7 technology to analyse and index visual events in real time. Visual features such as shape, colour and texture are extracted and used to describe the images stored on the system. A search of large volumes of data can be performed very quickly. We show examples of the fast search made possible with VISSTM.

Berriss, William P.; Price, Wayne G.; Bober, Miroslaw Z.

2002-12-01

402

Video Game Designer  

NSDL National Science Digital Library

Do you like to play video games? Did you know that in your future career you could design video games for youth just like you? Read the information on this site to learn what a video designer does and what classes you need to take in order to become one. You can also read about some famous current video game designers and about the games they have designed.

2005-12-05

403

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

404

More About The Video Event Trigger  

NASA Technical Reports Server (NTRS)

Report presents additional information about system described in "Video Event Trigger" (LEW-15076). Digital electronic system processes video-image data to generate trigger signal when image shows significant change, such as motion, or appearance, disappearance, change in color, brightness, or dilation of object. Potential uses include monitoring of hallways, parking lots, and other areas during hours when supposed unoccupied, looking for fires, tracking airplanes or other moving objects, identification of missing or defective parts on production lines, and video recording of automobile crash tests.

Williams, Glenn L.

1996-01-01

405

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

406

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.

407

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

408

Video-Augmented Environments  

E-print Network

Video-Augmented Environments A dissertation submitted for the degree of Doctor of Philosophy James of application. Video cameras are ideally suited to many real- world monitoring applications for this reason deployment in the home and office economically viable. The use of video as an input device also allows

Haddadi, Hamed

409

1 Introduction Surround video  

E-print Network

1 Introduction Surround video: a multihead camera approach Frank Nielsen Sony Computer Science videos. Given a set of unit cameras designed to be almost aligned at a common nodal point, we first present a versatile pro- cess for stitching seamlessly synchronized streams of videos into a single

Nielsen, Frank

410

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

411

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

412

Haptic Video Satoshi Saga  

E-print Network

Haptic Video Satoshi Saga The University of Tokyo Kevin Vlack The University of Tokyo Hiroyuki of professional skills is typically performed with conventional educational materials like video, demonstrating propose "Haptic Video", a system that records an expert's operations and reproduces them dynamically

Tachi, Susumu

413

Secure video communications system  

DOEpatents

A secure video communications system having at least one command network formed by a combination of subsystems. The combination of subsystems to include a video subsystem, an audio subsystem, a communications subsystem, and a control subsystem. The video communications system to be window driven and mouse operated, and having the ability to allow for secure point-to-point real-time teleconferencing.

Smith, Robert L. (Idaho Falls, ID)

1991-01-01

414

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

415

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

416

Video Cartridges and Cassettes.  

ERIC Educational Resources Information Center

The economic and social significance of video cassettes (viewer-controlled playback system) is explored in this report. The potential effect of video cassettes on industrial training, education, libraries, and television is analyzed in conjunction with the anticipated hardware developments. The entire video cassette industry is reviewed firm by…

Kletter, Richard C.; Hudson, Heather

417

Independent Video in Britain.  

ERIC Educational Resources Information Center

Maintaining the status quo as well as the attitude toward cultural funding and development that it imposes on video are detrimental to the formation of a thriving video network, and also out of key with the present social and political situation in Britain. Independent video has some quite specific advantages as a medium for cultural production…

Stewart, David

418

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

419

Browsing digital video  

Microsoft Academic Search

Video in digital format coupled with digital\\/programmable playback devices presents opportunities for significantly enhancing the user's viewing experience. For example, time compression can shorten the viewing length of a video and shot boundary frames can provide a visual index into the content. Such features have primarily been evaluated in isolation with a narrow set of video content types. We investigated

Francis C. Li; Anoop Gupta; Elizabeth Sanocki; Li-wei He; Yong Rui

2000-01-01

420

Forensic video image analysis  

NASA Astrophysics Data System (ADS)

Forensic video image analysis is a new scientific tool for perpetrator enhancement and identification in poorly recorded crime scene situations. Forensic video image analysis is emerging technology for law enforcement, industrial security and surveillance addressing the following problems often found in these poor quality video recorded incidences.

Edwards, Thomas R.

1997-02-01

421

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

422

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

423

The Spaghetti City Video Manual; A Guide to Use, Repair, and Maintenance.  

ERIC Educational Resources Information Center

Information on how to use, maintain, repair and modify portable video equipment is presented in this technical manual for nontechnicians. The four major sections are devoted to the theoretical foundations upon which video equipment is based, an introduction to video systems, basic maintenance, and advanced maintenance. The emphasis throughout the…

1973

424

Informative frame classification for endoscopy video  

Microsoft Academic Search

Advances in video technology allow inspection, diagnosis and treatment of the inside of the human body without or with very small scars. Flexible endoscopes are used to inspect the esophagus, stomach, small bowel, colon, and airways, whereas rigid endoscopes are used for a variety of minimal invasive surgeries (i.e., laparoscopy, arthroscopy, endoscopic neurosurgery). These endoscopes come in various sizes, but

Jung-Hwan Oh; Sae Hwang; JeongKyu Lee; Wallapak Tavanapong; Johnny Wong; Piet C. de Groen

2007-01-01

425

VideoMAP and VideoSpaceIcon: tools for anatomizing video content  

Microsoft Academic Search

A new approach to interacting with stored video is proposed. The approach utilizes VideoMAP and VideoSpaceIcon. VideoMAP is the interface that shows the essential video features in an easy to perceive manner. VideoSpaceIcon represents the temporal and spatial characteristics of a video shot as an intuitive icon. A video indexing method supports both tools. These tools allow the user's creativity

Yoshinobu Tonomura; Akihito Akutsu; Kiyotaka Otsuji; Toru Sadakata

1993-01-01

426

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

427

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

428

Female Validation Specialist Video  

NSDL National Science Digital Library

The Northeast Biomanufacturing Center and Collaborative (NBC2) has created a series of videos in which technicians describe their job and the preparation they received for it. These videos are great tools for other manufacturing programs to educate current students on options available to them after they graduate and the skills or courses they found most applicable to their real world experience. In this particular video, Validation Specialist Victoria Kelley discusses her education, her job search, and the experiences of her current position, including the travel involved. This video is 6:43 long, is in Windows Media Video (wmv) format, and can be played with Quicktime or Windows Media Player.

2009-10-01

429

Validation Specialist Video  

NSDL National Science Digital Library

The Northeast Biomanufacturing Center and Collaborative (NBC2) has created a series of videos in which technicians describe their job and the preparation they received for it. These videos are great tools for other manufacturing programs to educate current students on options available to them after they graduate and the skills or courses they found most applicable to their real world experience. In this particular video, Validation Specialist Dennis Woodby discusses his background, education, job search, and the skills he has found to be useful in job hunting. This video is 4:18 long, is in Windows Media Video (wmv) format, and can be played with Quicktime or Windows Media Player.

2009-10-01

430

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

431

Airborne video surveillance  

NASA Astrophysics Data System (ADS)

Video image exploitation is an increasingly crucial component of battlefield surveillance systems. In order to address the present difficulties pertaining to video exploitation of tactical sensors, DARPA has developed the Airborne Video Surveillance (AVS) program. AVS will utilize Electro-Optical (EO) and Infrared (IR) video imagery similar to that available from current and future Unmanned Aerial Vehicle (UAV) systems. The AVS program will include the development, integration, and evaluation of technologies pertaining to precision video registration, multiple target surveillance, and automated activity monitoring into a system capable of real-time UAV video exploitation. When combined with existing EO and IR target recognition algorithms, AVS will provide the Warfighter with a comprehensive video battlespace awareness capability.

Gilmore, John F.; Garren, David A.

1998-09-01

432

Assurance Technology Challenges of Advanced Space Systems  

NASA Technical Reports Server (NTRS)

The initiative to explore space and extend a human presence across our solar system to revisit the moon and Mars post enormous technological challenges to the nation's space agency and aerospace industry. Key areas of technology development needs to enable the endeavor include advanced materials, structures and mechanisms; micro/nano sensors and detectors; power generation, storage and management; advanced thermal and cryogenic control; guidance, navigation and control; command and data handling; advanced propulsion; advanced communication; on-board processing; advanced information technology systems; modular and reconfigurable systems; precision formation flying; solar sails; distributed observing systems; space robotics; and etc. Quality assurance concerns such as functional performance, structural integrity, radiation tolerance, health monitoring, diagnosis, maintenance, calibration, and initialization can affect the performance of systems and subsystems. It is thus imperative to employ innovative nondestructive evaluation methodologies to ensure quality and integrity of advanced space systems. Advancements in integrated multi-functional sensor systems, autonomous inspection approaches, distributed embedded sensors, roaming inspectors, and shape adaptive sensors are sought. Concepts in computational models for signal processing and data interpretation to establish quantitative characterization and event determination are also of interest. Prospective evaluation technologies include ultrasonics, laser ultrasonics, optics and fiber optics, shearography, video optics and metrology, thermography, electromagnetics, acoustic emission, x-ray, data management, biomimetics, and nano-scale sensing approaches for structural health monitoring.

Chern, E. James

2004-01-01

433

VLSI-based Video Event Triggering for Image Data Compression  

NASA Technical Reports Server (NTRS)

Long-duration, on-orbit microgravity experiments require a combination of high resolution and high frame rate video data acquisition. The digitized high-rate video stream presents a difficult data storage problem. Data produced at rates of several hundred million bytes per second may require a total mission video data storage requirement exceeding one terabyte. A NASA-designed, VLSI-based, highly parallel digital state machine generates a digital trigger signal at the onset of a video event. High capacity random access memory storage coupled with newly available fuzzy logic devices permits the monitoring of a video image stream for long term (DC-like) or short term (AC-like) changes caused by spatial translation, dilation, appearance, disappearance, or color change in a video object. Pre-trigger and post-trigger storage techniques are then adaptable to archiving only the significant video images.

Williams, Glenn L.

1994-01-01

434

Video Texture Synthesis Based on Flow-Like Stylization Painting  

PubMed Central

The paper presents an NP-video rendering system based on natural phenomena. It provides a simple nonphotorealistic video synthesis system in which user can obtain a flow-like stylization painting and infinite video scene. Firstly, based on anisotropic Kuwahara filtering in conjunction with line integral convolution, the phenomena video scene can be rendered to flow-like stylization painting. Secondly, the methods of frame division, patches synthesis, will be used to synthesize infinite playing video. According to selection examples from different natural video texture, our system can generate stylized of flow-like and infinite video scenes. The visual discontinuities between neighbor frames are decreased, and we also preserve feature and details of frames. This rendering system is easy and simple to implement. PMID:25133253

Wenhua, Qian; Dan, Xu; Kun, Yue; Zheng, Guan

2014-01-01

435

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

436

Video Traces for Network Performance Evaluation  

E-print Network

Video Traces for Network Performance Evaluation A Comprehensive Overview and Guide on Video Traces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Part I Digital Video 2 Introduction to Digital Video.2 Digital Picture and Video Representation . . . . . . . . . . . . . . . . . . . 8 2.3 Video Hierarchy

Reisslein, Martin

437

Video motion detection for physical security applications  

SciTech Connect

Physical security specialists have been attracted to the concept of video motion detection for several years. Claimed potential advantages included additional benefit from existing video surveillance systems, automatic detection, improved performance compared to human observers, and cost effectiveness. In recent years significant advances in image processing dedicated hardware and image analysis algorithms and software have accelerated the successful application of video motion detection systems to a variety of physical security applications. Currently Sandia is developing several advanced systems that employ image processing techniques for a broader set of safeguards and security applications. TCATS (Target Cueing and Tracking System) uses a set of powerful, flexible, modular algorithms and software to alarm on purposeful target motion. Custom TCATS hardware optimized for perimeter security applications is currently being evaluated with video input. VISDTA (Video Imaging System for Detection, Tracking, and Assessment) uses some of the same TCATS algorithms and operates with a thermal imager input. In the scan mode, VISDTA detects changes in a scene from the previous image at a given scan point; in the stare mode, VISDTA detects purposeful motion similar to TCATS.

Matter, J.C.

1990-01-01

438

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

439

Digital Video 1 DIGITAL VIDEO, LEARNING STYLES AND STUDENT UNDERSTANDING  

E-print Network

Digital Video 1 DIGITAL VIDEO, LEARNING STYLES AND STUDENT UNDERSTANDING Digital Video, Learning University in 1997. Her doctoral work involved the assessment of and interactive digital video technique #12;Digital Video 2 teachers, particularly those teachers whose background does not include

Larkin, Teresa L.

440

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.

441

From Video Matching to Video Grounding Georgios Evangelidis  

E-print Network

From Video Matching to Video Grounding Georgios Evangelidis INRIA Rh^one-Alpes, 38330, Montbonnot.horaud@inria.fr Abstract This paper addresses the background estimation problem for videos captured by moving cameras, referred to as video grounding. It essentially aims at reconstructing a video, as if it would be without

Boyer, Edmond

442

Video2Text: Learning to Annotate Video Content Hrishikesh Aradhye  

E-print Network

Video2Text: Learning to Annotate Video Content Hrishikesh Aradhye George Toderici Jay Yagnik Google the weak labels already available in the form of video title, descrip- tion, and tags. Prior work related audiovisual features of 25 million YouTube.com videos ­ nearly 150 years of video data ­ effectively searching

Tomkins, Andrew

443

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

444

Object Video Streams: A Framework for Preserving Privacy in Video  

E-print Network

Object Video Streams: A Framework for Preserving Privacy in Video Surveillance Faisal Z. Qureshi Abstract Here we introduce a framework for preserving privacy in video surveil- lance. Raw video footage is decomposed into a background and one or more object- video streams. Such object-centric decomposition

Qureshi, Faisal Z.

445

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

446

A geometric comparison of video camera-captured raster data to vector-parented raster data generated by the X-Y digitizing table  

NASA Technical Reports Server (NTRS)

The relative accuracy of a georeferenced raster data set captured by the Megavision 1024XM system using the Videk Megaplus CCD cameras is compared to a georeferenced raster data set generated from vector lines manually digitized through the ELAS software package on a Summagraphics X-Y digitizer table. The study also investigates the amount of time necessary to fully complete the rasterization of the two data sets, evaluating individual areas such as time necessary to generate raw data, time necessary to edit raw data, time necessary to georeference raw data, and accuracy of georeferencing against a norm. Preliminary results exhibit a high level of agreement between areas of the vector-parented data and areas of the captured file data where sufficient control points were chosen. Maps of 1:20,000 scale were digitized into raster files of 5 meter resolution per pixel and overall error in RMS was estimated at less than eight meters. Such approaches offer time and labor-saving advantages as well as increasing the efficiency of project scheduling and enabling the digitization of new types of data.

Swalm, C.; Pelletier, R.; Rickman, D.; Gilmore, K.

1989-01-01

447

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

448

The network video terminal  

SciTech Connect

Currently, a variety of the MBONE video tools provide video conferencing capabilities on different platforms and with a variety of compression algorithms. However, most of these tools lack the ability to interact with other media agents that might be used during a conferencing session. Such interaction is required, for example, for achieving lip synchronization between audio and video streams or for quality of service control. In this paper, we present a new video tool, NEVIT. This tool provides the basic capabilities needed for video conferencing services such as video capturing, compression and decompression engines and multicasting and ATM network interfaces. To ease the interaction with other media agents, NEVIT incorporates a message handling facility to interact over a local conference bus with other media agents, a floor controller or the conference controller. Currently, we are working on adding lip synchronization and quality-of-service control using this conference bus.

Sisalem, D.; Schulzrinne, H. [GMD FOKUS, Berlin (Germany); Sieckmeyer, C. [Technical Univ. of Berlin (Germany)

1996-12-31

449

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

450

Identifying hidden voice and video streams  

NASA Astrophysics Data System (ADS)

Given the rising popularity of voice and video services over the Internet, accurately identifying voice and video traffic that traverse their networks has become a critical task for Internet service providers (ISPs). As the number of proprietary applications that deliver voice and video services to end users increases over time, the search for the one methodology that can accurately detect such services while being application independent still remains open. This problem becomes even more complicated when voice and video service providers like Skype, Microsoft, and Google bundle their voice and video services with other services like file transfer and chat. For example, a bundled Skype session can contain both voice stream and file transfer stream in the same layer-3/layer-4 flow. In this context, traditional techniques to identify voice and video streams do not work. In this paper, we propose a novel self-learning classifier, called VVS-I , that detects the presence of voice and video streams in flows with minimum manual intervention. Our classifier works in two phases: training phase and detection phase. In the training phase, VVS-I first extracts the relevant features, and subsequently constructs a fingerprint of a flow using the power spectral density (PSD) analysis. In the detection phase, it compares the fingerprint of a flow to the existing fingerprints learned during the training phase, and subsequently classifies the flow. Our classifier is not only capable of detecting voice and video streams that are hidden in different flows, but is also capable of detecting different applications (like Skype, MSN, etc.) that generate these voice/video streams. We show that our classifier can achieve close to 100% detection rate while keeping the false positive rate to less that 1%.

Fan, Jieyan; Wu, Dapeng; Nucci, Antonio; Keralapura, Ram; Gao, Lixin

2009-04-01

451

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

452

For Good Measure Video  

NSDL National Science Digital Library

This short video (2:01) uses an engaging approach to emphasize the importance of tracking and studying precipitation. The video cast explains how the Global Precipitation Measurement (GPM) mission will use a constellation of satellites to achieve global coverage, thereby providing scientists with accurate precipitation data from around the world. In addition to the video, the site contains supplemental text which provides background information on the GPM mission.

453

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

454

Distributed Video Coding  

Microsoft Academic Search

Distributed coding is a new paradigm for video compression, based on Slepian and Wolf's and Wyner and Ziv's information-theoretic results from the 1970s. This paper reviews the recent development of practical distributed video coding schemes. Wyner-Ziv coding, i.e., lossy compression with receiver side information, enables low-complexity video encoding where the bulk of the computation is shifted to the decoder. Since

Bernd Girod; ANNE MARGOT AARON; Shantanu Rane; David Rebollo-Monedero

2005-01-01

455

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

456

Advanced researches of closed cycle MHD power generation in Tokyo Institute of Technology: FUJI-1 experiments and numerical simulations  

SciTech Connect

The recent developments of power generation experiments and numerical simulations for closed cycle MHD power generation performed at Tokyo Institute of Technology are explained and discussed. The FUJI-1 experiments realize 18.4% of enthalpy extraction, and the 38.1 and 30.1% of enthalpy extraction are obtained by shock tunnel facility for He/Cs and Ar/Cs working gases, respectively. The author can succeed with the 3-dimensional calculations of two temperature model equation for nonequilibrium plasma in a disk generator. The experimental and numerical results promise a high efficiency MHD power generation system, and a typical system which realizes the total efficiency of 60% is proposed.

Kabashima, S.

1998-07-01

457

Intergraph video and images exploitation capabilities  

NASA Astrophysics Data System (ADS)

The current paper focuses on the capture, fusion and process of aerial imagery in order to leverage full motion video, giving analysts the ability to collect, analyze, and maximize the value of video assets. Unmanned aerial vehicles (UAV) have provided critical real-time surveillance and operational support to military organizations, and are a key source of intelligence, particularly when integrated with other geospatial data. In the current workflow, at first, the UAV operators plan the flight by using a flight planning software. During the flight the UAV send a live video stream directly on the field to be processed by Intergraph software, to generate and disseminate georeferenced images trough a service oriented architecture based on ERDAS Apollo suite. The raw video-based data sources provide the most recent view of a situation and can augment other forms of geospatial intelligence - such as satellite imagery and aerial photos - to provide a richer, more detailed view of the area of interest. To effectively use video as a source of intelligence, however, the analyst needs to seamlessly fuse the video with these other types of intelligence, such as map features and annotations. Intergraph has developed an application that automatically generates mosaicked georeferenced image, tags along the video route which can then be seamlessly integrated with other forms of static data, such as aerial photos, satellite imagery, or geospatial layers and features. Consumers will finally have the ability to use a single, streamlined system to complete the entire geospatial information lifecycle: capturing geospatial data using sensor technology; processing vector, raster, terrain data into actionable information; managing, fusing, and sharing geospatial data and video toghether; and finally, rapidly and securely delivering integrated information products, ensuring individuals can make timely decisions.

Colla, Simone; Manesis, Charalampos

2013-08-01

458

The Video Guide. Second Edition.  

ERIC Educational Resources Information Center

Intended for both novice and experienced users, this guide is designed to inform and entertain the reader in unravelling the jargon surrounding video equipment and in following carefully delineated procedures for its use. Chapters include "Exploring the Video Universe,""A Grand Tour of Video Technology,""The Video System,""The Video Camera,""The…

Bensinger, Charles

459

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.

2012-08-28

460

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

461

Putting Integrated Systems Health Management Capabilities to Work: Development of an Advanced Caution and Warning System for Next-Generation Crewed Spacecraft Missions  

NASA Technical Reports Server (NTRS)

Integrated System Health Management (ISHM) technologies have advanced to the point where they can provide significant automated assistance with real-time fault detection, diagnosis, guided troubleshooting, and failure consequence assessment. To exploit these capabilities in actual operational environments, however, ISHM information must be integrated into operational concepts and associated information displays in ways that enable human operators to process and understand the ISHM system information rapidly and effectively. In this paper, we explore these design issues in the context of an advanced caution and warning system (ACAWS) for next-generation crewed spacecraft missions. User interface concepts for depicting failure diagnoses, failure effects, redundancy loss, "what-if" failure analysis scenarios, and resolution of ambiguity groups are discussed and illustrated.

Mccann, Robert S.; Spirkovska, Lilly; Smith, Irene

2013-01-01

462

Video Traffic Characteristics of Modern Encoding Standards: H.264/AVC with SVC and MVC Extensions and H.265/HEVC  

PubMed Central

Video encoding for multimedia services over communication networks has significantly advanced in recent years with the development of the highly efficient and flexible H.264/AVC video coding standard and its SVC extension. The emerging H.265/HEVC video coding standard as well as 3D video coding further advance video coding for multimedia communications. This paper first gives an overview of these new video coding standards and then examines their implications for multimedia communications by studying the traffic characteristics of long videos encoded with the new coding standards. We review video coding advances from MPEG-2 and MPEG-4 Part 2 to H.264/AVC and its SVC and MVC extensions as well as H.265/HEVC. For single-layer (nonscalable) video, we compare H.265/HEVC and H.264/AVC in terms of video traffic and statistical multiplexing characteristics. Our study is the first to examine the H.265/HEVC traffic variability for long videos. We also illustrate the video traffic characteristics and statistical multiplexing of scalable video encoded with the SVC extension of H.264/AVC as well as 3D video encoded with the MVC extension of H.264/AVC. PMID:24701145

2014-01-01

463

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

464

CAUSAL GRAPH-BASED VIDEO SEGMENTATION Camille Couprie  

E-print Network

algorithms are in general super-linear, there is often a need to reduce the dimensionality of the video-linear time by using a minimum spanning tree. The algorithm may be trivially extended to video segmentation can be generated from watershed based approaches. In particular the method of Felzenswalb

LeCun, Yann

465

Graphcut textures: image and video synthesis using graph cuts  

Microsoft Academic Search

In this paper we introduce a new algorithm for image and video texture synthesis. In our approach, patch regions from a sample image or video are transformed and copied to the output and then stitched together along optimal seams to generate a new (and typically larger) output. In contrast to other techniques, the size of the patch is not chosen

Vivek Kwatra; Arno Schödl; Irfan A. Essa; Greg Turk; Aaron F. Bobick

2003-01-01

466

Preliminary Investigation of a Video-Based Stimulus Preference Assessment  

ERIC Educational Resources Information Center

Video clips may be an effective format for presenting complex stimuli in preference assessments. In this preliminary study, we evaluated the correspondence between preference hierarchies generated from preference assessments that included either toys or videos of the toys. The top-ranked item corresponded in both assessments for 5 of the 6…

Snyder, Katie; Higbee, Thomas S.; Dayton, Elizabeth

2012-01-01

467

Early fire detection method in video for vessels  

Microsoft Academic Search

New generation vessels are equipped with fire detecting sensors; however, fire may not immediately be detected if it is far away from the sensors. The fire process therefore cannot be recorded. A video-based fire alarm system is developed to overcome the drawbacks of traditional fire detection equipment. This paper presents a video-based flame and smoke detection method for vessels. For

Shuenn-jyi Wang; Dah-lih Jeng; Meng-tsai Tsai

2009-01-01

468

The YouTube Video Recommendation System James Davidson  

E-print Network

The YouTube Video Recommendation System James Davidson Google Inc davidson@google.com Benjamin at YouTube, the world's most popular online video commu- nity. The system recommends personalized sets of user-generated content, YouTube presents some unique op- portunities and challenges for content

Ricci, Francesco

469

Open Up Cultural Heritage in Video Archives with Mediaglobe  

E-print Network

video search engine and introduce its workflow including video analysis, metadata generation, semantic Yang {givenname.lastname}@hpi.uni-potsdam.de Hasso Plattner Institute for Software Systems Engineering material is growing. Recently also internet and world wide web (WWW) are used for media distribution

Weske, Mathias

470

STEM Careers Phone Video Chat  

NSDL National Science Digital Library

This brief video from WPSU compares technologies from yesterday with today. Yesterday a middle school girl phones her mom while today a girl the same age video chats. The video suggests that science will bring us technologies of tomorrow.

Wpsu

2009-11-10

471

Anatomy Videos: MedlinePlus  

MedlinePLUS

... Health Topics Drugs & Supplements Videos & Cool Tools ESPAÑOL Anatomy Videos To use the sharing features on this ... please enable JavaScript. These animated videos show the anatomy of body parts and organ systems and how ...

472

Healthy Eating with Diabetes Video  

MedlinePLUS Videos and Cool Tools

... Eating with Diabetes Video Healthy Eating with Diabetes Video Making changes in the way you eat can ... Eating with Diabetes Transcript Healthy Eating with Diabetes Video (MP4) Keywords: self-management , healthy eating , National Diabetes ...

473

Video Communication Networks Dan Schonfeld  

E-print Network

Video Communication Networks Dan Schonfeld Multimedia Communications Laboratory Department Chicago, IL 60607-7053 ds@ece.uic.edu Abstract In this presentation, a broad overview of video communication networks is provided. Numerous video communication applications are currently being developed

Schonfe