These are representative sample records from Science.gov related to your search topic.
For comprehensive and current results, perform a real-time search at Science.gov.
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

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

4

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

NASA Astrophysics Data System (ADS)

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.

Howard, Richard T.; Bryan, Thomas C.

2009-03-01

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

Proximity sensing with wavelet generated video Steven E. Noel  

E-print Network

Proximity sensing with wavelet generated video Steven E. Noel The Center for Advanced Computer wavelet video processing of proximity sensor signals. Proximity sensing is required for a wide range of military and commercial applications, including weapon fuzing, robotics, and automotive collision avoidance

Noel, Steven

10

Advanced Digital Video Processing Unit  

NASA Astrophysics Data System (ADS)

Following the development of several high-speed image processing systems, it has been acknowledged that the only way to achieve real low power and system compactness is by using customized ICs. In an effort to reduce the development cost and the turnaround time, a unique architecture has been devised to combine semicustom ICs and off-the-shelf devices. The unit is controlled by a microprocessor. The microprocessor sets the various parameters according to the desired process. The procedure itself is carried out by a miniarray processor composed of an Address Generator IC, off the shelf static RAMs, and a Data processing IC. Using advanced CMOS technology and pipeline architecture, high-speed processing is achieved while power consumption and system volum are kept very low. The paper presents the architecture of the unit along with various configurations in which it can be used, and its performance.

Orbach, Z.; Hershman, A.

1985-07-01

11

An Advanced Video Sensor for Automated Docking  

NASA Technical Reports Server (NTRS)

This paper describes the current developments in video-based sensors at the Marshall Space Flight Center. The Advanced Video Guidance Sensor is the latest in a line of video-based sensors designed for use in automated docking systems. The X-33, X-34, X-38, and X-40 are all designed to be unpiloted vehicles; such vehicles will require a sensor system that will provide adequate data for the vehicle to accomplish its mission. One of the primary tasks planned for re-usable launch vehicles is to resupply the space station. In order to approach the space station in a self-guided manner, the vehicle must have a reliable and accurate sensor system to provide relative position and attitude information between the vehicle and the space station. The Advanced Video Guidance Sensor is being designed and built to meet this requirement, as well as requirements for other vehicles docking to a variety of target spacecraft. The Advanced Video Guidance Sensor is being designed to allow range and bearing information to be measured at ranges up to 2 km. The sensor will measure 6-degree-of-freedom information (relative positions and attitudes) from approximately 40 meters all the way in to final contact (approximately 1 meter range). The sensor will have a data output rate of 20 Hz during tracking mode, and will be able to acquire a target within one half of a second. The prototype of the sensor will be near completion at the time of the conference.

Howard, Richard T.; Bryan, Thomas C.; Book, Michael L.; Roe, Fred (Technical Monitor)

2001-01-01

12

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

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

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

15

Summarization of Egocentric Moving Videos for Generating Walking Route Guidance  

E-print Network

that the proposed method is much better than a simple baseline summarization method without video analysis. KeywordsSummarization of Egocentric Moving Videos for Generating Walking Route Guidance Masaya Okamoto to summarize an ego- centric moving video (a video recorded by a moving wearable camera) for generating

Yanai, Keiji

16

Advanced Video Guidance Sensor (AVGS) Development Testing  

NASA Technical Reports Server (NTRS)

NASA's Marshall Space Flight Center was the driving force behind the development of the Advanced Video Guidance Sensor, an active sensor system that provides near-range sensor data as part of an automatic rendezvous and docking system. 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 camera to detect the return from the target, and image capture electronics and a digital signal processor to convert the video information into the relative positions and attitudes. The AVGS will fly as part of the Demonstration of Autonomous Rendezvous Technologies (DART) in October, 2004. This development effort has required a great deal of testing of various sorts at every phase of development. Some of the test efforts included optical characterization of performance with the intended target, thermal vacuum testing, performance tests in long range vacuum facilities, EMI/EMC tests, and performance testing in dynamic situations. The sensor has been shown to track a target at ranges of up to 300 meters, both in vacuum and ambient conditions, to survive and operate during the thermal vacuum cycling specific to the DART mission, to handle EM1 well, and to perform well in dynamic situations.

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

2004-01-01

17

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

18

Advanced Video Data-Acquisition System For Flight Research  

NASA Technical Reports Server (NTRS)

Advanced video data-acquisition system (AVDAS) developed to satisfy variety of requirements for in-flight video documentation. Requirements range from providing images for visualization of airflows around fighter airplanes at high angles of attack to obtaining safety-of-flight documentation. F/A-18 AVDAS takes advantage of very capable systems like NITE Hawk forward-looking infrared (FLIR) pod and recent video developments like miniature charge-couple-device (CCD) color video cameras and other flight-qualified video hardware.

Miller, Geoffrey; Richwine, David M.; Hass, Neal E.

1996-01-01

19

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

20

AUTOMATIC GENERATION OF DUBBING VIDEO SLIDES FOR MOBILE WIRELESS ENVIRONMENT  

E-print Network

analysis, DVS method can dynamically select and transmit representative video frames which are relatively analysis. We then use these representative frames as substitutes for those adjacent video intervalsAUTOMATIC GENERATION OF DUBBING VIDEO SLIDES FOR MOBILE WIRELESS ENVIRONMENT Wei Wang and Michael R

Lyu, Michael R.

21

Automatic segmentation of moving objects for video object plane generation  

Microsoft Academic Search

The new video coding standard MPEG-4 is enabling content-based functionalities. It takes advantage of a prior decomposition of sequences into video object planes (VOPs) so that each VOP represents one moving object. A comprehensive review summarizes some of the most important motion segmentation and VOP generation techniques that have been proposed. Then, a new automatic video sequence segmentation algorithm that

Thomas Meier; King N. Ngan

1998-01-01

22

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

23

Cinema comics: Cartoon generation from video stream  

Microsoft Academic Search

This paper presents CORVIS(COmics Rendering system on VIdeo Stream) which helps to create comic strips from video streams in semi-automated manner. For this, first we manually select a set of important featuring scenes in a cinema and transform them into simplified illustrations by Mean-Shift segmentation. Then we insert the stylized comic effects to each illustration by considering the before\\/after video

Won-il Hwang; Pyung-jun Lee; Bong-kyung Chun; Dong-sung Ryu; Hwan-gue Cho

2006-01-01

24

Generating advertising keywords from video content  

Microsoft Academic Search

With the proliferation of online distribution methods for videos, content owners require easier and more effective methods for monetization through advertising. Matching advertisements with related content has a significant impact on the effectiveness of the ads, but current methods for selecting relevant advertising keywords for videos are limited by reliance on manually supplied metadata. In this paper we study the

Michael J. Welch; Junghoo Cho; Walter Chang

2010-01-01

25

Rate-Distortion Optimal Video Summary Generation  

Microsoft Academic Search

The need for video summarization originates pri- marily from a viewing time constraint. A shorter version of the original video sequence is desirable in a number of applications. Clearly, a shorter version is also necessary in applications where storage, communication bandwidth, and\\/or power are limited. The summarization process inevitably introduces distortion. The amount of summarization distortion is related to its

Zhu Li; Guido M. Schuster; Aggelos K. Katsaggelos; Bhavan Gandhi

2005-01-01

26

Advanced Rate Adaption for Unicast Streaming of Scalable Video  

E-print Network

Advanced Rate Adaption for Unicast Streaming of Scalable Video Chenghao Liu Tampere University streaming applications. In order to support rate adaptation, 3GPP Packet-Switched Streaming Service (PSS of sub-streams in scalable media streaming. Moreover, a new rate adaptation method is presented that a

Gabbouj, Moncef

27

Machine vision: recent advances in CCD video camera technology  

Microsoft Academic Search

This paper describes four state-of-the-art digital video cameras, which provide advanced features that benefit computer image enhancement, manipulation, and analysis. These cameras were designed to reduce the complexity of imaging systems while increasing the accuracy, dynamic range, and detail enhancement of product inspections. Two cameras utilize progressive scan CCD sensors enabling the capture of high- resolution image of moving objects

Richard A. Easton; Ronald J. Hamilton

1997-01-01

28

A Practical Video Digest Generation System Designed for Nursery Schools  

E-print Network

In this paper, we present a video digest generation system that designed for use in nursery schools. The system utilizes plural surveillance cameras that set in different nursery rooms, each has a corresponding RFID receiver to catch the signal send by RFID tags. With every kid having a RFID tag in the pocket all the day time, the system automatically generate one daily video digest for each kid. The digest is generated through two types of processing. One is RDIF log analysis, which quickly picks out videos that expect to have the target kids ’ appearance. The other is visual feature analysis, which recognizes events in raw video materials, select video segments for each event and construct the digest. The practical performance of our system is confirmed in both quantitative experiment and questionnaire survey. 1

Yu Wang; Tomoya Ishikawa; Jien Kato; Kenichiro Ishii; Shigeki Yokoi

29

Generating Advertising Keywords from Video Content Michael J. Welch  

E-print Network

for videos, content owners require easier and more effective meth- ods for monetization through advertisingGenerating Advertising Keywords from Video Content Michael J. Welch UCLA Computer Science Dept 4732. Matching adver- tisements with related content has a significant impact on the effectiveness of the ads

Cho, Junghoo "John"

30

Detailed Precipitation Measurements for GV: Advances in Video-Distrometers  

NASA Astrophysics Data System (ADS)

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

Schwinzerl, Martin; Lammer, Günter; Schönhuber, Michael

2014-05-01

31

Proximity sensing with wavelet-generated video  

Microsoft Academic Search

In this paper we introduce wavelet video processing of proximity sensor signals. Proximity sensing is required for a wide range of military and commercial applications, including weapon fuzing, robotics, and automotive collision a voidance. While ou r proposed method temporarily increases s ignal dimension, it eventually performs data compression through the extraction of salient signal features. This data compression in

Steven E. Noel; Harold H. Szu

1998-01-01

32

Second generation PFB for advanced power generation  

SciTech Connect

Research is being conducted under a United States Department of Energy (USDOE) contract to develop a new type of coal-fueled plant for electric power generation. This new type of plant-called an advanced or second-generation pressurized fluidized bed combustion (APFBC) plant-offers the promise of 45-percent efficiency (HHV), with emissions and a cost of electricity that are significantly lower than conventional pulverized-coal-fired plants with scrubbers. This paper summarizes the pilot plant R&D work being conducted to develop this new type of plant. Although pilot plant testing is still underway, preliminary estimates indicate the commercial plant Will perform better than originally envisioned. Efficiencies greater than 46 percent are now being predicted.

Robertson, A.; Van Hook, J.

1995-11-01

33

Advanced downhole periodic seismic generator  

DOEpatents

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

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

1991-07-16

34

Next-Generation Entertainment: Video Goes Mobile  

Microsoft Academic Search

The big hurdles to mainstream adoption of video on cell phones today aren't so much matters of technology as they are of business models. That's good news, if you think companies like Verizon can be as clever as, say, Apple has been with iTunes, in presenting an elegant device, striking deals for content, making end-user software simple, and keeping pricing

Laurianne Mclaughlin; Greg Goth

2007-01-01

35

ADVANCES IN CHANNEL-ADAPTIVE VIDEO STREAMING Bernd Girod, Mark Kalman, Yi J. Liang, Rui Zhang  

E-print Network

ADVANCES IN CHANNEL-ADAPTIVE VIDEO STREAMING Bernd Girod, Mark Kalman, Yi J. Liang, Rui Zhang Invited Paper Abstract We review recent advances in channel-adaptive video streaming. Adaptive media improve the error-robustness of stream- ing video and reduce or eliminate the need for packet retransmis

Girod, Bernd

36

Using System Generator to Design a Reconfigurable Video Encryption System  

Microsoft Academic Search

As FPGAs increase in size there is a need for improved productivity, and this includes new design flows and tools. System Generator, from Xilinx, is a high-level block-based design tool that offers bit and cycle accurate simulation. In this paper, we discuss the use of System Generator to design a reconfigurable video encryption system. It includes the design of the

Daniel Denning; Neil Harold; Malachy Devlin; James Irvine

2003-01-01

37

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

E-print Network

Multi-Class Video Co-Segmentation with a Generative Multi-Video Model Wei-Chen Chiu Mario Fritz Max Planck Institute for Informatics, Saarbr¨ucken, Germany {walon,mfritz}@mpi-inf.mpg.de Abstract Video data resources. Tasks like segmentation benefit greatly from the analysis of spatio-temporal motion patterns

38

Improved side information generation for Distributed Video Coding  

Microsoft Academic Search

As a new coding paradigm, distributed video coding (DVC) deals with lossy source coding using side information to exploit the statistics at the decoder to reduce computational demands at the encoder. The performance of DVC highly depends on the quality of side information. With a better side information generation method, fewer bits will be requested from the encoder and more

Xin Huang; Søren Forchhammer

2008-01-01

39

Recent advances in uniportal video-assisted thoracoscopic surgery.  

PubMed

Thanks to the recent improvements in video-assisted thoracoscopic techniques (VATS) and anesthetic procedures, a great deal of complex lung resections can be performed avoiding open surgery. The experience gained through VATS techniques, enhancement of the surgical instruments, improvement of high definition cameras and avoidance of intubated general anesthesia have been the greatest advances to minimize the trauma to the patient. Uniportal VATS for major resections has become a revolution in the treatment of lung pathologies since initially described 4 years ago. The huge number of surgical videos posted on specialized websites, live surgery events and experimental courses has contributed to the rapid learning of uniportal major thoracoscopic surgery during the last years. The future of the thoracic surgery is based on evolution of surgical procedures and anesthetic techniques to try to reduce the trauma to the patient. Further development of new technologies probably will focus on sealing devices for all vessels and fissure, refined staplers and instruments, improvements in 3D systems or wireless cameras, and robotic surgery. As thoracoscopic techniques continue to evolve exponentially, we can see the emergence of new approaches in the anesthetical and the perioperative management of these patients. Advances in anesthesia include lobectomies performed without the employment of general anesthesia, through maintaining spontaneous ventilation, and with minimally sedated patients. Uniportal VATS resections under spontaneous ventilation probably represent the least invasive approach to operate lung cancer. PMID:25717231

Gonzalez-Rivas, Diego

2015-02-01

40

Development of a new MPEG standard for advanced 3D video applications  

Microsoft Academic Search

An overview of available 3D video formats and standards is given. It is explained why none of these - although each useful in some particular sense, for some particular application - satisfies all requirements of all 3D video applications. Advanced formats currently under investigation, which have the potential to serve as generic, flexible and efficient future 3D video standard are

Aljoscha Smolic; Karsten Mueller; P. Merkle; A. Vetro

2009-01-01

41

Recent Advances in Content-Based Video Analysis  

Microsoft Academic Search

In this paper, we present major issues in video parsing, abstraction, retrieval and seman- tic analysis. We discuss the success, the diculties and the expectations in these areas. In addition, we identify important opened problems that can lead to more sophisticated ways of video content analysis. For video parsing, we discuss topics in video partitioning, motion characterization and object segmentation.

Chong-wah Ngo; Ting-chuen Pong; Hongjiang Zhang

2001-01-01

42

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

43

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

44

Daily Digest Generation of Kindergartner from Surveillance Video  

NASA Astrophysics Data System (ADS)

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

Ishikawa, Tomoya; Wang, Yu; Kato, Jien

45

Hybrid narrative and categorical strategies for interactive and dynamic video presentation generation  

Microsoft Academic Search

There are a number of different approaches for automatically selecting video clips from a video database and sequencing them into meaningful presentations for viewers. The video database represents a multidimensional video hyperspace, and the sequencing algorithms function as (interactive) dynamic linking and path generation techniques within this hyperspace. Sequencing has been based upon either a narrative or a categorical model

Craig A. Lindley; Frank Nack

2000-01-01

46

Videos  

Cancer.gov

Home News and Events Multimedia Library Videos Videos:  Miscellaneous Videos Video: Louis Staudt, M.D., Ph.D., Director of the National Cancer Institute's Center for Cancer Genomics, discusses the future of genomics research. Dr. Louis Staudt discusses

47

Towards a next generation open-source video codec  

NASA Astrophysics Data System (ADS)

Google has recently been developing a next generation opensource video codec called VP9, as part of the experimental branch of the libvpx repository included in the WebM project (http://www.webmproject.org/). Starting from the VP8 video codec released by Google in 2010 as the baseline, a number of enhancements and new tools have been added to improve the coding efficiency. This paper provides a technical overview of the current status of this project along with comparisons and other stateoftheart video codecs H. 264/AVC and HEVC. The new tools that have been added so far include: larger prediction block sizes up to 64x64, various forms of compound INTER prediction, more modes for INTRA prediction, ?pel motion vectors and 8tap switchable subpel interpolation filters, improved motion reference generation and motion vector coding, improved entropy coding and framelevel entropy adaptation for various symbols, improved loop filtering, incorporation of Asymmetric Discrete Sine Transforms and larger 16x16 and 32x32 DCTs, frame level segmentation to group similar areas together, etc. Other tools and various bitstream features are being actively worked on as well. The VP9 bitstream is expected to be finalized by earlyto mid2013. Results show VP9 to be quite competitive in performance with mainstream stateoftheart codecs.

Bankoski, Jim; Bultje, Ronald S.; Grange, Adrian; Gu, Qunshan; Han, Jingning; Koleszar, John; Mukherjee, Debargha; Wilkins, Paul; Xu, Yaowu

2013-02-01

48

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

49

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

E-print Network

Advances in Channel-adaptive Video Streaming Bernd Girod, Mark Kalman, Yi J. Liang, and Rui Zhang streaming has experienced phenomenal growth, owing to the extensive research in video coding and transmission. In this paper, we review several recent advances for channel-adaptive video streaming that, we

Girod, Bernd

50

Audio Keyword Generation for Sports Video Analysis , Ling-Yu Duan  

E-print Network

of training data in the case of different sports games videos. In this demo, we present a flexible Hidden of data from a new sports game video. Promising results has been demonstrated on the tennis, soccerAudio Keyword Generation for Sports Video Analysis Min Xu 1 , Ling-Yu Duan 2 , Liang-Tien Chia 1

Chia, Liang-Tien

51

Hidden Markov Models for Video Skim Generation Sergio Benini, Pierangelo Migliorati and Riccardo Leonardi  

E-print Network

recognition, genome sequence analy- sis, etc. For video analysis, HMMs have been used to distin- guishHidden Markov Models for Video Skim Generation Sergio Benini, Pierangelo Migliorati and Riccardo present a statistical framework based on hidden Markov models (HMMs) for video skimming. A chain of HMMs

Migliorati, Pierangelo

52

Robust and Rapid Generation of Animated Faces From Video Images: A Model-Based Modeling Approach  

E-print Network

-to-use and cost-effective system to construct textured 3D animated face models from videos with minimal user to computer games, filmmaking, online chat, virtual presence, video conferencing, etc. GeneRobust and Rapid Generation of Animated Faces From Video Images: A Model-Based Modeling Approach

Narasayya, Vivek

53

Real-time geo-registered steerable video generation  

NASA Astrophysics Data System (ADS)

In this paper we present a new approach to the real-time generation and dissemination of steerable video chips from large volume motion imagery streams. Traditional large frame motion imagery streaming and dissemination systems employ JPEG 2000 (J2K) compression and associated JPEG 2000 Interactive Protocol (JPIP) streaming to encode and deliver images over varying bandwidth communication channels. While J2K and JPIP technologies are suitable for many large frame motion imagery applications, they often struggle to satisfy the needs of certain low power, low bandwidth users. The J2K format does not currently support inter-frame compression and, therefore, cannot target the lowest bandwidth motion imagery users. Additionally, J2K decompression and JPIP processing both consume more computational resources than low-end client systems often have available. This is especially true for handheld and thin-client devices. We address these issues by integrating region-of-interest J2K compression and JPIP streaming with MPEG-2 and H.264 video compression technology, taking advantage of the ubiquitous hardware acceleration and client ingest support for these full motion video product formats. The proposed architecture maintains all the benefits of incorporating a J2K archival format, while also boasting the ability to disseminate J2K regions-of-interest and low resolution overviews to an even greater number of simultaneous clients. We illustrate a real-time integration and implementation of these technologies and show how they can be used to enable interactive and automated tracking and dissemination of multiple moving objects from wide area persistent surveillance motion imagery.

Maenner, Paul; Dockstader, Shiloh L.; Shuler, Roddy; Brower, Bernard V.; Pellechia, Matthew F.

2010-04-01

54

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

55

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

56

Technology advancement of an oxygen generation subsystem  

NASA Technical Reports Server (NTRS)

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

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

1979-01-01

57

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

58

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

E-print Network

Combining Search-based Procedural Content Generation and Social Gaming in the Petalz Video Game In@gmail.com, kstanley@eecs.ucf.edu Abstract Search-based procedural content generation methods allow video games users, positively influences the dynamics of the game, and opens new possibilities in digital

Stanley, Kenneth O.

59

Characterizing and Modeling Popularity of User-generated Videos Youmna Borghol1,2  

E-print Network

Characterizing and Modeling Popularity of User-generated Videos Youmna Borghol1,2 Siddharth Mitra3, Saskatoon, SK S7N 5C9, Canada Abstract This paper develops a framework for studying the popularity dynamics of user-generated videos, presents a characterization of the popularity dynamics, and proposes a model

Saskatchewan, University of

60

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

61

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

62

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

E-print Network

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

Candan, Selçuk

63

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

64

Next Generation NASA GA Advanced Concept  

NASA Technical Reports Server (NTRS)

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

Hahn, Andrew S.

2006-01-01

65

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

66

Multi-modal highlight generation for sports videos using an information-theoretic excitability measure  

NASA Astrophysics Data System (ADS)

The ability to detect and organize `hot spots' representing areas of excitement within video streams is a challenging research problem when techniques rely exclusively on video content. A generic method for sports video highlight selection is presented in this study which leverages both video/image structure as well as audio/speech properties. Processing begins where the video is partitioned into small segments and several multi-modal features are extracted from each segment. Excitability is computed based on the likelihood of the segmental features residing in certain regions of their joint probability density function space which are considered both exciting and rare. The proposed measure is used to rank order the partitioned segments to compress the overall video sequence and produce a contiguous set of highlights. Experiments are performed on baseball videos based on signal processing advancements for excitement assessment in the commentators' speech, audio energy, slow motion replay, scene cut density, and motion activity as features. Detailed analysis on correlation between user excitability and various speech production parameters is conducted and an effective scheme is designed to estimate the excitement level of commentator's speech from the sports videos. Subjective evaluation of excitability and ranking of video segments demonstrate a higher correlation with the proposed measure compared to well-established techniques indicating the effectiveness of the overall approach.

Hasan, Taufiq; Bo?il, Hynek; Sangwan, Abhijeet; L Hansen, John H.

2013-12-01

67

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

68

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

69

Efficient key frames selection for panorama generation from video  

NASA Astrophysics Data System (ADS)

A video sequence consists of several hundred frames, and as a result, creating a panoramic image from these frames is a very time-consuming process. Consecutive frames have large overlap areas that do not provide much information. Therefore, some key frames must be extracted for better performance. There are a number of methods for key-frame selection that match all frames in a video sequence. We present a novel and efficient method to select key frames from video for creating a large panoramic mosaic without matching all frames. Consecutive frames are transformed and projected onto the common mosaic surface and the position of each corner of the next frame is predicted with a distinct Kalman filter on this surface. The overlap area between each predicted frame and its previous key frame is used as the criterion to select the next key frame. This method uses video information to reduce features and align frames with repeated structures more accurately. We show that this approach is an efficient preprocessing step and substantially reduces the time required to construct panorama from a video sequence.

Fadaeieslam, Mohammad Javad; Soryani, Mohsen; Fathy, Mahmood

2011-04-01

70

Omnifocus video camera  

NASA Astrophysics Data System (ADS)

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

Iizuka, Keigo

2011-04-01

71

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

Microsoft Academic Search

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

Tanveer Fathima Syeda-Mahmood; Dulce B. Ponceleon

2001-01-01

72

VIRTUAL LIGHT: DIGITALLY-GENERATED LIGHTING FOR VIDEO CONFERENCING APPLICATIONS  

E-print Network

method to improve the lighting conditions of a real scene or video sequence. In particular we concentrate on modifying real light sources intensities and inserting virtual lights into a real scene viewed from a fixed the scene is first reconstructed geometrically by means of computer vision techniques, light exchanges among

Fisher, Kathleen

73

Panoramic Video Generation by Multi View Data Synthesis  

Microsoft Academic Search

This paper presents a mosaic based approach for enlarged view soccer video production that can be provided to the audience as a complementary view for greater enjoyment of relevant events, such as offside, counter attack or goal, that spread out all over the playing field. Firstly, an enlarged view of the whole field is produced by fusing the images of

Tiziana D'Orazio; Marco Leo; Nicola Mosca

2010-01-01

74

Advanced gasification-based biomass power generation  

SciTech Connect

A promising strategy for modernizing bioenergy is the production of electricity or the cogeneration of electricity and heat using gasified biomass with advanced conversion technologies. Major advances that have been made in coal gasification technology, to marry the gas turbine to coal, are readily adaptable to biomass applications. Integrating biomass gasifiers with aeroderivative gas turbines in particular makes it possible to achieve high efficiencies and low unit capital costs at the modest scales required for bioenergy systems. Electricity produced with biomass-integrated gasifier/gas turbine (BIG/GT) power systems not only offers major environmental benefits but also would be competitive with electricity produced from fossil fuels and nuclear energy under a wide range of circumstances. Initial applications will be with biomass residues generated in the sugarcane, pulp and paper, and other agro- and forest-product industries. Eventually, biomass grown for energy purposes on dedicated energy farms will also be used to fuel these gas turbine systems. Continuing improvements in jet engine and biomass gasification technologies will lead to further gains in the performance of BIG/GT systems over the next couple of decades. Fuel cells operated on gasified biomass offer the promise of even higher performance levels in the period beyond the turn of the century. 79 refs., 21 figs., 11 tabs.

Williams, R.H.; Larson, E.D. [Princeton Univ., NJ (United States)

1993-12-31

75

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

76

Detection of slow-motion replay segments in sports video for highlights generation  

Microsoft Academic Search

We present a novel method for generating sports video summary highlights. Specifically, our method localizes semantically important events in sport programs by detecting slow motion replays of these events, and then generates highlights of these events at multiple levels. In our method, a hidden Markov model (HMM) is used to model slow motion replays, and an inference algorithm is introduced

H. Pan; P. van Beek; M. I. Sezan

2001-01-01

77

Advances in Network-adaptive Video Streaming Bernd Girod, Jacob Chakareski, Mark Kalman, Yi J. Liang, Eric Setton, and Rui Zhang  

E-print Network

Advances in Network-adaptive Video Streaming Bernd Girod, Jacob Chakareski, Mark Kalman, Yi J delivered over the network. Still, Internet video streaming has ex- perienced phenomenal growth in the last review several recent advances for network-adaptive video streaming that, we believe, will benefit

Girod, Bernd

78

Ordinal-based method for robust image/video signature generation  

NASA Astrophysics Data System (ADS)

This paper proposes an algorithm for generating a video signature based on an ordinal measure. Current methods which use a measure of temporal ordinal rank are robust to many transformations but can only detect the entire query video, not a segment of the query, while methods which use local features may be more robust to certain transformations but less robust to excessive noise. The proposed algorithm incorporates region-based spatial information while maintaining a strong robustness to noise, different resolutions, illumination shifts and video file formats. In our method, a frame is first divided into blocks. For each pixel in a block, a slice (a binary image computed based on the comparison between the greyscale intensity of each pixel in the frame and the reference pixel) is generated. The slices of all the pixels in a block are then added component-wise to obtain a metaslice for the block. In order to compute the distance between any two frames, the Euclidean distance between corresponding metaslices of the two frames is computed to obtain the metadistance between two blocks. Summing the metadifferences over all blocks and normalizing give the final measure of distance between the two frames. To improve the speed of the algorithm, keyframes are first downsized and pixel intensity values are represented by the average of a small block. A table of frame differences between two sets of keyframes from two video sequences is constructed and then converted to a similarity matrix using a threshold. The longest chain of consecutive similar keyframes is found and this produces the best matching video sequence between the two videos. This algorithm is capable of taking into account differences between videos at various scales and is useful for finding duplicate or modified copies of a query video in a database. Preliminary experimental results are encouraging and demonstrate the potential of the proposed algorithm.

Chen, Daniel Chongli; Chaisorn, Lekha; Rahardja, Susanto

2008-08-01

79

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

80

Advanced generating technologies - Motivation and selection process in electric utilities  

NASA Astrophysics Data System (ADS)

Electric utilities are constantly seeking advanced methods for generating electricity to meet the future demand. The primary motivation for the development of advanced technologies is to generate electricity with minimum damage to the environment and with resources that are abundant. The utility planner evaluates the role of these technologies in the future system considering both quantifiable and nonquantifiable benefits and risks involved.

Bhavaraju, Murty P.

1993-03-01

81

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

82

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

E-print Network

of YouTube and other similar UGC systems. In particular, we study the popularity life-cycle of videos, Design Keywords User Generated Content, Power-Law, Long Tail, VoD, P2P, Caching, Popularity Analysis and production companies. Content popularity was somewhat controllable through professional marketing cam- paigns

Moon, Sue B.

83

Fast generation of three-dimensional video holograms by combined use of data compression and lookup table techniques.  

PubMed

Even though there are many types of methods to generate CGH (computer-generated hologram) patterns of three-dimensional (3D) objects, most of them have been applied to still images but not to video images due to their computational complexity in applications of 3D video holograms. A new method for fast computation of CGH patterns for 3D video images is proposed by combined use of data compression and lookup table techniques. Temporally redundant data of the 3D video images are removed with the differential pulse code modulation (DPCM) algorithm, and then the CGH patterns for these compressed videos are generated with the novel lookup table (N-LUT) technique. To confirm the feasibility of the proposed method, some experiments with test 3D videos are carried out, and the results are comparatively discussed with the conventional methods in terms of the number of object points and computation time. PMID:19002222

Kim, Seung-Cheol; Yoon, Jung-Hoon; Kim, Eun-Soo

2008-11-10

84

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

85

Next-generation supersonic passenger jet - video animation  

NASA Technical Reports Server (NTRS)

NASA and its industry partners are developing technologies for a next-generation supersonic passenger jet that would fly 300 passengers at more than twice the speed of sound. As envisioned, a high-speed civil transport would cross the Pacific or Atlantic in less than half the time of modern subsonic jets - at a ticket price less than 20 percent above comparable subsonic flights. Technology to make this possible is being developed as part of NASA's High-Speed Research program, supported by a team of major U.S. aerospace companies in a multi-year research program begun in 1990.

1998-01-01

86

High-resolution image generation from video image sequences by light field  

NASA Astrophysics Data System (ADS)

We propose a novel method to synthesize high-resolution images by constructing a light field from image sequence taken with a moving video camera. Our method integrates multiple frames from video camera that partly captures the object by constructing a light field, which is quite different from general mosaic methods. In case of light field constructed straightforwardly, blur and discontinuity are introduced into generated images by depth variation of the object. In our method, light field is optimized to remove these blur and discontinuity, so that clear images can be generated. The optimized light field is adapted to the depth variation of object surface, but the exact shape of the object is not necessary. Extremely large resolution images that are impractical in the real system can be virtually generated from the light field. Results of the experiment applied to book surface demonstrate the effectiveness of the proposed method.

Kobayashi, Kenkichi; Saito, Hideo

2000-12-01

87

Scale-up of advanced MHD generators  

NASA Astrophysics Data System (ADS)

The steady state performance and fluid mechanical behavior of linear, combustion-driven MHD power generators from laboratory-scale to commercial-scale are characterized through numerical analysis of seven real generator designs. Despite the diverse philosophies embodied in these designs, the power extraction parameters and quasi-three-dimensional fluid behavior correlate well with appropriate interaction parameters. The scale dependence of transverse conductivity nonuniformity and its influence on generator performance are examined, and the impact of the unconventional flow field in the MHD generator upon the design and performance of other MHD System components is discussed.

Maxwell, C. D.; Demetriades, S. T.; Oliver, D. A.; Vetter, A. A.; Swean, T. F.

1980-01-01

88

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

89

Generating Performance Measures From Portland's Archived Advanced Traffic  

E-print Network

of numerous Advanced Traffic Management Systems (ATMS) as part of our nation's Intelligent TransportationGenerating Performance Measures From Portland's Archived Advanced Traffic Management System Data and Environmental Engineering University of Maryland 1179 Glenn Martin Hall College Park, MD 20742 Phone: 301

Bertini, Robert L.

90

Recent advances in RF power generation  

SciTech Connect

This paper is a review of the progress and methods used in RF generation for particle accelerators. The frequencies of interest are from a few megahertz to 100 GHz, and the powers are for super linear collider applications, but in this case the pulses are short, generally below 1 {mu}s. The very high-power, short-pulse generators are only lightly reviewed here, and for more details the reader should follow the specialized references. Different RF generators excel over various parts of the frequency spectrum. Below 100 MHz solid-state devices and gridded tubes prevail, while the region between 400 MHz and 3 GHz, the cyclotron-resonant devices predominate, and above 250 GHz, Free-Electron Lasers and ubitrons are the most powerful generators. The emphasis for this review is on microwave generation at frequencies below 20 GHz, so the cyclotron-resonant devices are only partially reviewed, while the progress on free-electron laser and ubitrons is not reviewed in this paper. 39 refs., 4 figs.

Tallerico, P.J.

1990-01-01

91

Moving objects extraction method in H.264/advanced video coding bit stream of a complex scene  

NASA Astrophysics Data System (ADS)

For the purpose of extracting moving objects from H.264/advanced video coding (AVC) bit stream of a complex scene, an algorithm based on maximum a posteriori Markov random field (MRF) framework to extract moving objects directly from H.264 compressed video is proposed in this paper. It mainly involves encoding information of motion vectors (MVs) and block partition modes in H.264/AVC bit stream and utilizes temporal continuity and spatial consistency of moving object's pieces. First, it retrieves MVs and block partition modes of identical 4×4 pixel blocks in P frames and establishes Gaussian mixture model (GMM) of the phase of MVs as a reference background, and then creates MRF model based on MVs, block partition modes, the GMM of the background, spatial, and temporal consistency. The moving objects are retrieved by solving the MRF model. The experimental results show that it can perform robustly in a complex environment and the precision and recall have been improved over the existing algorithm.

Mingsheng, Chen; Mingxin, Qin; Guangming, Liang; Jixiang, Sun; Xu, Ning

2013-08-01

92

ADVANCED DTM GENERATION FROM LIDAR DATA  

Microsoft Academic Search

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

K. Kraus; N. Pfeifer

2001-01-01

93

Testing to Characterize the Advanced Stirling Radioisotope Generator Engineering Unit  

NASA Technical Reports Server (NTRS)

The Advanced Stirling Radioisotope Generator (ASRG), a high efficiency generator, is being considered for space missions. Lockheed Martin designed and fabricated an engineering unit (EU), the ASRG EU, under contract to the Department of Energy. This unit is currently undergoing extended operation testing at the NASA Glenn Research Center to generate performance data and validate life and reliability predictions for the generator and the Stirling convertors. It has also undergone performance tests to characterize generator operation while varying control parameters and system inputs. This paper summarizes and explains test results in the context of designing operating strategies for the generator during a space mission and notes expected differences between the EU performance and future generators.

Lewandowski, Edward; Schreiber, Jeffrey

2010-01-01

94

Advances in understanding cancer genomes through second-generation sequencing  

Microsoft Academic Search

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

Stacey Gabriel; Gad Getz; Matthew Meyerson

2010-01-01

95

MCEER Advanced Technology Research for Next Generation Seismic Resilient Buildings  

Microsoft Academic Search

Over the last two decades, significant research effort has been directed toward the application of advanced technologies to improve the seismic performance of civil infrastructure. MCEER has played a role in that development. In this paper, we present an overview of the integrated MCEER research program aimed at the development of a new generation of seismic resilient buildings. While MCEER

Gary F. Dargush; George C. Lee

96

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.

97

New-generation short-haul airliner uses advanced technology  

SciTech Connect

The Saab-Fairchild 340 is a twin-engined, low-wing, 34-passenger pressurized turboprop airplane. It incorporates a modern fuel efficient propulsion system and a new advanced technology wing, resulting in a new-generation airliner for the short-haul market.

Sanator, R.J.; Honczarenko, G.

1982-06-01

98

Advancing beyond current generation dye-sensitized solar cells  

Microsoft Academic Search

for the last 17 years. In this article we outline the strategies for improving each of the three major photo-relevant components of a DSSC, review literature reports consistent with these strategies and suggest future directions. Finally we explore the potential of future generation DSSCs for advancing energy-conversion performance.

Thomas W. Hamann; Rebecca A. Jensen; Alex B. F. Martinson; Hal Van Ryswyk; Joseph T. Hupp

2008-01-01

99

Advanced-generation macrolides: tissue-directed antibiotics  

Microsoft Academic Search

The azalide antibiotic azithromycin and the newer macrolides, such as clarithromycin, dirithromycin and roxithromycin, can be regarded as ‘advanced-generation’ macrolides compared with erythromycin, the first macrolide used clinically as an antibiotic. Their pharmacokinetics are characterized by a combination of low serum concentrations, high tissue concentrations and, in the case of azithromycin, an extended tissue elimination half-life. Azithromycin is particularly noted

G. W Amsden

2001-01-01

100

Artificial Video for Video Analysis  

ERIC Educational Resources Information Center

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

Gallis, Michael R.

2010-01-01

101

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

102

Caterpillar`s advanced reciprocating engine for distributed generation markets  

SciTech Connect

Competition in energy markets and federal and state policy advocating clean, advanced technologies as means to achieve environmental and global climate change goals are clear drivers to original equipment manufacturers of prime movers. Underpinning competition are the principle of consumer choice to facilitate retail competition, and the desire to improve system and grid reliability. Caterpillar`s Gas Engine Division is responding to the market`s demand for a more efficient, lower lifecycle cost engine with reduced emissions. Cat`s first generation TARGET engine will be positioned to effectively serve distributed generation and combined heat and power (CHP) applications. TARGET (The Advanced Reciprocating Gas Engine Technology) will embody Cat`s product attributes: durability, reliability, and competitively priced life cycle cost products. Further, Caterpillar`s nationwide, fully established dealer sales and service ensure continued product support subsequent to the sale and installation of the product.

Gerber, G.; Brandes, D.; Reinhart, M.; Nagel, G.; Wong, E. [Caterpillar, Inc., Sacramento, CA (United States)

1999-11-01

103

Generating highly realistic 3D animation video with depth-of-field and motion blur effects  

NASA Astrophysics Data System (ADS)

A computationally efficient algorithm is described for generating shift-variant defocus and motion blur effects for animation video. This algorithm precisely models rigid body motion of 3-D objects which includes arbitrary translational and rotational motion. Camera parameters such as aperture diameter, focal length, and the location of image detector are used to calculate the blur circle radius of point spread functions (PSFs) modeled by Gaussian and Cylindrical functions. In addition, a novel and simple method similar to image inpainting is described for filling missing pixels that arise due to object motion, round-off errors, interpolation or changes in magnification. Performance of the algorithms are demonstrated on a set of 3D shapes such as sphere, cylinder, cone, etc. The software tool developed in this research is also useful in computer vision and image processing research. It can be used for simulating test data with known ground truth in the testing and evaluation of depth-from-defocus and image/video de-blurring algorithms.

Sathyanarayana, Karthik; Subbarao, Muralidhara

2010-08-01

104

Automatic tag generation and ranking for sensor-rich outdoor videos  

Microsoft Academic Search

Video tag annotations have become a useful and powerful feature to facilitate video search in many social media and web applications. The majority of tags assigned to videos are supplied by users - a task which is time consuming and may result in annotations that are subjective and lack precision. A number of studies have utilized content-based extraction techniques to

Zhijie Shen; Sakire Arslan Ay; Seon Ho Kim; Roger Zimmermann

2011-01-01

105

Advanced nanoparticle generation and excitation by lasers in liquids.  

PubMed

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

Barcikowski, Stephan; Compagnini, Giuseppe

2013-03-01

106

Picturing Video  

NASA Technical Reports Server (NTRS)

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

2000-01-01

107

Advanced DTM Generation from Very High Resolution Satellite Stereo Images  

NASA Astrophysics Data System (ADS)

This work proposes a simple filtering approach that can be applied to digital surface models in order to extract digital terrain models. The method focusses on robustness and computational efficiency and is in particular tailored to filter DSMs that are extracted from satellite stereo images. It represents an evolution of an existing DTM generation method and includes distinct advancement through the integration of multi-directional processing as well as slope dependent filtering, thus denoted "MSD filtering". The DTM generation workflow is fully automatic and requires no user interaction. Exemplary results are presented for a DSM generated from a Pléiades tri-stereo image data set. Qualitative and quantitative evaluations with respect to highly accurate reference LiDAR data confirm the effectiveness of the proposed algorithm.

Perko, R.; Raggam, H.; Gutjahr, K. H.; Schardt, M.

2015-03-01

108

Free-viewpoint image generation from a video captured by a handheld camera  

NASA Astrophysics Data System (ADS)

In general, free-viewpoint image is generated by captured images by a camera array aligned on a straight line or circle. A camera array is able to capture synchronized dynamic scene. However, camera array is expensive and requires great care to be aligned exactly. In contrast to camera array, a handy camera is easily available and can capture a static scene easily. We propose a method that generates free-viewpoint images from a video captured by a handheld camera in a static scene. To generate free-viewpoint images, view images from several viewpoints and information of camera pose/positions of these viewpoints are needed. In a previous work, a checkerboard pattern has to be captured in every frame to calculate these parameters. And in another work, a pseudo perspective projection is assumed to estimate parameters. This assumption limits a camera movement. However, in this paper, we can calculate these parameters by "Structure From Motion". Additionally, we propose a selection method for reference images from many captured frames. And we propose a method that uses projective block matching and graph-cuts algorithm with reconstructed feature points to estimate a depth map of a virtual viewpoint.

Takeuchi, Kota; Fukushima, Norishige; Yendo, Tomohiro; Panahpour Tehrani, Mehrdad; Fujii, Toshiaki; Tanimoto, Masayuki

2011-03-01

109

BIOMASS GASIFICATION AND POWER GENERATION USING ADVANCED GAS TURBINE SYSTEMS  

SciTech Connect

A multidisciplined team led by the United Technologies Research Center (UTRC) and consisting of Pratt & Whitney Power Systems (PWPS), the University of North Dakota Energy & Environmental Research Center (EERC), KraftWork Systems, Inc. (kWS), and the Connecticut Resource Recovery Authority (CRRA) has evaluated a variety of gasified biomass fuels, integrated into advanced gas turbine-based power systems. The team has concluded that a biomass integrated gasification combined-cycle (BIGCC) plant with an overall integrated system efficiency of 45% (HHV) at emission levels of less than half of New Source Performance Standards (NSPS) is technically and economically feasible. The higher process efficiency in itself reduces consumption of premium fuels currently used for power generation including those from foreign sources. In addition, the advanced gasification process can be used to generate fuels and chemicals, such as low-cost hydrogen and syngas for chemical synthesis, as well as baseload power. The conceptual design of the plant consists of an air-blown circulating fluidized-bed Advanced Transport Gasifier and a PWPS FT8 TwinPac{trademark} aeroderivative gas turbine operated in combined cycle to produce {approx}80 MWe. This system uses advanced technology commercial products in combination with components in advanced development or demonstration stages, thereby maximizing the opportunity for early implementation. The biofueled power system was found to have a levelized cost of electricity competitive with other new power system alternatives including larger scale natural gas combined cycles. The key elements are: (1) An Advanced Transport Gasifier (ATG) circulating fluid-bed gasifier having wide fuel flexibility and high gasification efficiency; (2) An FT8 TwinPac{trademark}-based combined cycle of approximately 80 MWe; (3) Sustainable biomass primary fuel source at low cost and potentially widespread availability-refuse-derived fuel (RDF); (4) An overall integrated system that exceeds the U.S. Department of Energy (DOE) goal of 40% (HHV) efficiency at emission levels well below the DOE suggested limits; and (5) An advanced biofueled power system whose levelized cost of electricity can be competitive with other new power system alternatives.

David Liscinsky

2002-10-20

110

Reconstruction of the Pose of Uncalibrated Cameras via User-Generated Videos  

E-print Network

of an uncalibrated video-based city ex- ploration system, where moving cameras allow the user to move between common points in purpose-captured videos, and to swap video at such a ‘portal’ via an aesthetically pleasing transition. A graph of the ways videos... . Sinha and M. Pollefeys. Camera network calibration and synchronization from silhouettes in archived video. International Journal of Computer Vision, 87(3):266–283, May 2010. [22] N. Snavely, S. M. Seitz, and R. Szeliski. Photo tourism: exploring photo...

Bennett, Stuart; Lasenby, Joan; Kokaram, Anil; Inguva, Sasi; Birkbeck, Neil

2014-01-01

111

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

112

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

113

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

114

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

115

Immersive video  

NASA Astrophysics Data System (ADS)

Interactive video and television viewers should have the power to control their viewing position. To make this a reality, we introduce the concept of Immersive Video, which employs computer vision and computer graphics technologies to provide remote users a sense of complete immersion when viewing an event. Immersive Video uses multiple videos of an event, captured from different perspectives, to generate a full 3D digital video of that event. That is accomplished by assimilating important information from each video stream into a comprehensive, dynamic, 3D model of the environment. Using this 3D digital video, interactive viewers can then move around the remote environment and observe the events taking place from any desired perspective. Our Immersive Video System currently provides interactive viewing and `walkthrus' of staged karate demonstrations, basketball games, dance performances, and typical campus scenes. In its full realization, Immersive Video will be a paradigm shift in visual communication which will revolutionize television and video media, and become an integral part of future telepresence and virtual reality systems.

Moezzi, Saied; Katkere, Arun L.; Jain, Ramesh C.

1996-03-01

116

Projective rectification-based view interpolation for multiview video coding and free viewpoint generation  

Microsoft Academic Search

A projective rectification-based view interpolation algorithm is developed for multiview video coding and free viewpoint video. It first calculates the fundamental matrix between two views without using any camera parameter. The two views are then resampled to have horizontal and matched epipolar lines. One-dimensional disparity is estimated next, which is used to interpolate the image for an intermediate viewpoint. After

Xiaoyu Xiu; Jie Liang

2009-01-01

117

Automatic Tag Generation and Ranking for Sensor-rich Outdoor Videos  

E-print Network

feature to facilitate video search in many social media and web applications. The majority of tags- erties of videos. With today's sensor-equipped smartphones, the location and orientation of a camera can. The results demonstrate significant benefits of our method in terms of automation and tag utility. Categories

Kim, Seon Ho

118

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

119

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

120

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

121

Advanced Structural Analyses by Third Generation Synchrotron Radiation Powder Diffraction  

NASA Astrophysics Data System (ADS)

Since the advent of the 3rd generation Synchrotron Radiation (SR) sources, such as SPring-8, the capabilities of SR powder diffraction increased greatly not only in an accurate structure refinement but also ab initio structure determination. In this study, advanced structural analyses by 3rd generation SR powder diffraction based on the Large Debye-Scherrer camera installed at BL02B2, SPring-8 is described. Because of high angular resolution and high counting statistics powder data collected at BL02B2, SPring-8, ab initio structure determination can cope with a molecular crystals with 65 atoms including H atoms. For the structure refinements, it is found that a kind of Maximum Entropy Method in which several atoms are omitted in phase calculation become very important to refine structural details of fairy large molecule in a crystal. It should be emphasized that until the unknown structure is refined very precisely, the obtained structure by Genetic Algorithm (GA) or some other ab initio structure determination method using real space structural knowledge, it is not possible to tell whether the structure obtained by the method is correct or not. In order to determine and/or refine crystal structure of rather complicated molecules, we cannot overemphasize the importance of the 3rd generation SR sources.

Sakata, M.; Aoyagi, S.; Ogura, T.; Nishibori, E.

2007-01-01

122

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

123

Clonal forestry, heterosis and advanced-generation breeding  

SciTech Connect

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

Tuskan, G.A.

1997-08-01

124

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

125

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

126

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

127

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

128

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

129

Advanced inpainting-based macroblock prediction with regularized structure propagation in video compression  

Microsoft Academic Search

In this paper, we propose an optimized inpainting-based macroblock (MB) prediction mode (IP-mode) in the state-of-the-art H.264\\/AVC video compression engine, and investigate a natural extension of structured sparsity over the ordered Belief Propagation (BP) inference in inpainting-based prediction. The IP-mode is regularized by a global spatio-temporal consistency between the predicted content and the co-located known texture, and could be adopted

Yang Xu; Hongkai Xiong

2010-01-01

130

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

131

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

132

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

133

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 SCR. The third reporting period in Phase II (April 1--June 30, 1998) included experimental activities at pilot scale and comparison of the results with full-scale data. The pilot scale tests were performed with the objective of simulating furnace conditions of ongoing full-scale tests at the Greenidge boiler No. 6 owned and operated by NYSEG and defining the processes controlling AR performance to subsequently improve the performance. The tests were conducted in EER' s Boiler Simulator Facility. The main fuel pulsing system was used at the BSF to control the degree of unmixedness, thus providing control over furnace gas O{sub 2} and CO concentrations. Results on AR-Lean, presented in the previous quarterly report, were compared with full-scale data. Performance of reburn+SNCR was tested to predict NO{sub x} control at Greenidge. The results of the BSF reburn+SNCR simulation tests demonstrated that there are synergistic advantages of using these two technologies in series. In particular, injection of overfire air provides additional mixing that reduces negative effects on AR performance at the temperature regime of the Greenidge boiler.

NONE

1998-07-30

134

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

135

Example-based video remixing for home videos  

Microsoft Academic Search

Video remixes are generally created by sequentially arranging selected video clips and combiningthem with other media streams such as audio clips. In this paper, an example-based approach is adopted for semi-automatically creating video remixes of good expressive quality from home videos. Given multiple home video clips and audio clips, the proposed system generates a video remix by four processes: I)video

Naoko Nitta; Noboru Babaguchi

2011-01-01

136

ADVANCED CERAMIC MATERIALS FOR NEXT-GENERATION NUCLEAR APPLICATIONS  

SciTech Connect

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

Marra, J.

2010-09-29

137

Advanced visualization platform for surgical operating room coordination: distributed video board system.  

PubMed

One of the major challenges for day-of-surgery operating room coordination is accurate and timely situation awareness. Distributed and secure real-time status information is key to addressing these challenges. This article reports on the design and implementation of a passive status monitoring system in a 19-room surgical suite of a major academic medical center. Key design requirements considered included integrated real-time operating room status display, access control, security, and network impact. The system used live operating room video images and patient vital signs obtained through monitors to automatically update events and operating room status. Images were presented on a "need-to-know" basis, and access was controlled by identification badge authorization. The system delivered reliable real-time operating room images and status with acceptable network impact. Operating room status was visualized at 4 separate locations and was used continuously by clinicians and operating room service providers to coordinate operating room activities. PMID:17012154

Hu, Peter F; Xiao, Yan; Ho, Danny; Mackenzie, Colin F; Hu, Hao; Voigt, Roger; Martz, Douglas

2006-06-01

138

A Personal Digital Assistant as an Advanced Remote Control for Audio\\/video Equipment  

Microsoft Academic Search

This paper describes a personal digital assistant that is used as a catalogue and advanced remote control tobrowse, select and play music in a compact disc jukebox. The application has been developed as a researchprototype to identify advantages and disadvantages of different interaction styles for accessing large amounts ofcontent. The basic concept provides easy access to a personal music catalogue,

John De Vet; Vincent Buil

139

A Personal Digital Assistant as an Advanced Remote Control for Audio/Video Equipment  

E-print Network

This paper describes a personal digital assistant that is used as a catalogue and advanced remote control to browse, select and play music in a compact disc jukebox. The application has been developed as a research prototype to identify advantages and disadvantages of different interaction styles

John De Vet; Vincent Buil

1999-01-01

140

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

NSDL National Science Digital Library

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

2013-08-22

141

Generating Synthetic Meta-data for Georeferenced Video Sakire Arslan Ay  

E-print Network

be customized through user parameters for a variety of GIS applications that use mobile videos. We demonstrate of Computer Science University of Southern California Los Angeles, CA 90089 arslan@usc.edu Seon Ho Kim Zimmermann School of Computing National University of Singapore Singapore 117417 rogerz

Kim, Seon Ho

142

The H.264\\/AVC Video Coding Standard for the Next Generation Multimedia Communication  

Microsoft Academic Search

The capacity of a communication channel is determined by its bandwidth and signal-to-noise ratio. For a digital user, these parameters determine the bit rate and the probability of error and so affect the achievable quality of service. In the recent multimedia communication systems, bandwidth is still a limiting factor. Hence, effective video compression techniques are essential to reduce the amount

M. Mahdi Ghandi; Mohammad Ghanbari

143

Second Generation Advanced Reburning for High Efficiency NOx Control  

SciTech Connect

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

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

2001-06-30

144

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

145

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

146

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

147

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

148

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

149

A method for generating enhanced vision displays using OpenGL video texture  

NASA Astrophysics Data System (ADS)

Degraded visual conditions can marvel the curious and destroy the unprepared. While navigation instruments are trustworthy companions, true visual reference remains king of the hills. Poor visibility may be overcome via imaging sensors such as low light level charge-coupled-device, infrared, and millimeter wave radar. Enhanced Vision systems combine this imagery into a comprehensive situation awareness display, presented to the pilot as reference imagery on a cockpit display, or as world-conformal imagery on head-up or head-mounted displays. This paper demonstrates that Enhanced Vision imaging can be achieved at video rates using typical CPU / GPU architecture, standard video capture hardware, dynamic non-linear ray tracing algorithms, efficient image transfer methods, and simple OpenGL rendering techniques.

Bernier, Kenneth L.

2010-04-01

150

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...

151

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

152

Development of advanced generator of singlet oxygen for a COIL  

Microsoft Academic Search

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, O2(1Delta), 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

Jarmila Kodymova; Otomar Spalek; Vít Jirásek; Miroslav Censký; Jan Hrubý

2006-01-01

153

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

154

Removal of Chloride from Wastewater by Advanced Softening Process Using Electrochemically Generated Aluminum Hydroxide  

E-print Network

solubility. Chloride can be removed from water and wastewater by precipitation as calcium chloroaluminate using advanced softening process. This research was conducted to evaluate chloride removal using electrochemically generated aluminum hydroxide and lime...

Mustafa, Syed Faisal

2014-07-23

155

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...

156

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

E-print Network

of MASTER OF SCIENCE December 1978 Major Sub)cot: Forestry COMPARISON OF TWO ADVANCED GENERATION MATING DESIGNS FOR LOBLOLLY PINE (Pinus caeda L. ) by PATRICIA ADLENE LAYTDN Appxcnied aa te style 'and tuateat by: tees) ber) ABSTRACT Comparison... of Two Advanced Generation Mating Designs for Loblolly Pine (Pinus taeda L. ) (December 1978) Patricia Adlene Layton, B. S. , Clemson University Chairman of Advisory Committee: Dr. J. P. van Bulgtenen This study was undertaken to determine...

Layton, Patricia Adlene

1978-01-01

157

Assessment of Metal Media Filters for Advanced Coal-Based Power Generation Applications  

SciTech Connect

Advanced coal and biomass-based gas turbine power generation technologies (IGCC, PFBC, PCFBC, and Hipps) are currently under development and demonstration. Efforts at Siemens Westinghouse Power Corporation (SWPC) have been focused on the development and demonstration of hot gas filter systems as an enabling technology for power generation. This paper reviews SWPC's material and component assessment efforts, identifying the performance, stability, and life of porous metal, advanced alloy, and intermetallic filters under simulated, pressurized fluidized-bed combustion conditions.

Alvin, M.A.

2002-09-19

158

Advanced Materials Research with 3RD Generation Synchrotron Light  

NASA Astrophysics Data System (ADS)

H and D surface nanochemistry on an advanced wide band gap semiconductor, silicon carbide is investigated by synchrotron radiation-based core level and valence band photoemission, infrared absorption and scanning tunneling spectroscopy, showing the 1st example of H/D-induced semiconductor surface metallization, that also occurs on a pre-oxidized surface. These results are compared to recent state-of-the-art ab-initio total energy calculations. Most interestingly, an amazing isotopic behavior is observed with a smaller charge transfer from D atoms suggesting the role of dynamical effects. Such findings are especially exciting in semiconductor physics and in interface with biology.

Soukiassian, P.; D'angelo, M.; Enriquez, H.; Aristov, V. Yu.

159

Effect of advanced technology on the second-generation SST  

SciTech Connect

Technological developments that promise to substantially increase the efficiency of next-generation subsonic commercial aircraft, together with additional developments in supersonic aircraft aerodynamics, structures and propulsion systems, are presently evaluated in order to project the extent of performance and economic improvement obtainable for a future SST by comparison to the Concorde SST. It is demonstrated that the second-generation SST projected will double passenger-carrying capacity from 100 for the Concorde to 200, despite reducing takeoff gross weight from 400,000 to 321,000 lbs and extending range by some 2000 nm.

Coen, P.G.

1986-01-01

160

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

NASA Technical Reports Server (NTRS)

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

Lohner, Rainald; Parikh, Paresh

1988-01-01

161

Development and application of an advanced switched reluctance generator drive  

E-print Network

will not generate the maximum output power. Therefore, a self-tuning algorithm, based on a local search method, is proposed and experimentally tested. It works effectively and does not need extra hardware or rigorous calculations. The attempts to benefit from...

Asadi, Peyman

2009-05-15

162

Nonlinearly Generated Advanced Pulse Waveforms for Optical Signal Processing  

E-print Network

* Corresponding author: s.a.boscolo@aston.ac.uk ABSTRACT Nonlinear phenomena occurring in optical fibres have many recent progress on the use of fibre nonlinearities for the generation and shaping of optical pulses, and frequency conversion. Keywords: nonlinear fibre optics, nonlinear pulse shaping, all-optical signal

Paris-Sud XI, Université de

163

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

164

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

165

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

SciTech Connect

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

Not Available

2012-08-01

166

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

167

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

SciTech Connect

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

Not Available

2012-08-01

168

Fast generation of video holograms of three-dimensional moving objects using a motion compensation-based novel look-up table.  

PubMed

A novel approach for fast generation of video holograms of three-dimensional (3-D) moving objects using a motion compensation-based novel-look-up-table (MC-N-LUT) method is proposed. Motion compensation has been widely employed in compression of conventional 2-D video data because of its ability to exploit high temporal correlation between successive video frames. Here, this concept of motion-compensation is firstly applied to the N-LUT based on its inherent property of shift-invariance. That is, motion vectors of 3-D moving objects are extracted between the two consecutive video frames, and with them motions of the 3-D objects at each frame are compensated. Then, through this process, 3-D object data to be calculated for its video holograms are massively reduced, which results in a dramatic increase of the computational speed of the proposed method. Experimental results with three kinds of 3-D video scenarios reveal that the average number of calculated object points and the average calculation time for one object point of the proposed method, have found to be reduced down to 86.95%, 86.53% and 34.99%, 32.30%, respectively compared to those of the conventional N-LUT and temporal redundancy-based N-LUT (TR-N-LUT) methods. PMID:23670014

Kim, Seung-Cheol; Dong, Xiao-Bin; Kwon, Min-Woo; Kim, Eun-Soo

2013-05-01

169

Hardware Co-simulation For Video Processing Using Xilinx System Generator  

Microsoft Academic Search

The use of rapid prototyping tools such as MATLAB- Simulink and Xilinx System Generator becomes increasingly important because of time-to-market constraints. This paper presents a methodology for implementing real-time DSP applications on a reconfigurable logic platform using Xilinx System Generator (XSG) for Matlab. The methodology aims to improve the design verfication efficiency for such complex system. It presents an architecture

T. Saidani; D. Dia; W. Elhamzi; M. Atri; R. Tourki

2009-01-01

170

Using Xilinx System Generator for Real Time Hardware Co-simulation of Video Processing System  

Microsoft Academic Search

\\u000a The use of rapid prototyping tools such as MATLAB-Simulink and Xilinx System Generator becomes increasingly important because\\u000a of time-to-market constraints. This paper presents a methodology for implementing real-time DSP applications on a reconfigurable\\u000a logic platform using Xilinx System Generator (XSG) for Matlab. The methodology aims to improve the design verfication efficiency\\u000a for such complex system. It presents architecture for Color

Taoufik Saidani; Mohamed Atri; Dhaha Dia; Rached Tourki

171

Video summarization with supervised learning  

Microsoft Academic Search

We present a video summarization technique based on supervised learning. Within a class of videos of similar nature, user provides the desired summaries for a subset of videos. Based on this supervised information, the summaries for other videos in the same class are generated. We derive frame-transitional features and subsequently represent each frame transition as a state. We then formulate

Jayanta Basak; Varun Luthra; Santanu Chaudhury

2008-01-01

172

Advanced generators used in mobile pulsed power sources  

NASA Astrophysics Data System (ADS)

In this paper consideration is given to the versions of electric generators that are used for supplying high-power energy-intensive loads by means of capacitive or inductive energy storage units and are to be employed in mobile power sources. An estimate of limiting power characteristics of megajoule high-speed engines is presented that may be useful in developing a design assignment for construction of suitable engines, and, on their basis, forced power sources for supplying non-typical consumers.

Zhelokova, M. Z.; Maksimova, I. F.

2010-12-01

173

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

174

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

175

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

176

Advanced Stirling Radioisotope Generator (ASRG) Thermal Power Model in MATLAB  

NASA Technical Reports Server (NTRS)

This paper presents a one-dimensional steady-state mathematical thermal power model of the ASRG. It aims to provide a guideline of understanding how the ASRG works and what can change its performance. The thermal dynamics and energy balance of the generator is explained using the thermal circuit of the ASRG. The Stirling convertor performance map is used to represent the convertor. How the convertor performance map is coupled in the thermal circuit is explained. The ASRG performance characteristics under i) different sink temperatures and ii) over the years of mission (YOM) are predicted using the one-dimensional model. Two Stirling converter control strategies, i) fixing the hot-end of temperature of the convertor by adjusting piston amplitude and ii) fixing the piston amplitude, were tested in the model. Numerical results show that the first control strategy can result in a higher system efficiency than the second control strategy when the ambient gets warmer or the general-purpose heat source (GPHS) fuel load decays over the YOM. The ASRG performance data presented in this paper doesn't pertain to the ASRG flight unit. Some data of the ASRG engineering unit (EU) and flight unit that are available in public domain are used in this paper for the purpose of numerical studies.

Wang, Xiao-Yen, J.

2012-01-01

177

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

178

Advanced designs for the next generation of electromagnetic actuators  

NASA Astrophysics Data System (ADS)

This dissertation refers to original features for designing the future generation of electromagnetic actuators in technologies to be implemented and used in industrial systems well into the next century. The first feature is represented by the method of premagnetization. In this study, this method is applied as a generalized method of affecting the global conversion cycle for the electromagnet, linear or rotational, for improving the total electromechanical energy converted. It takes advantage of the nonlinearity of ferromagnetic material, augments the range of parameters of state, and consequently increases the area of one conversion cycle. The second feature is the sensorless control method which replaces a concrete position sensor or a position sensor system with an intelligent process which characterizes implicitly the sensing process and thus substitutes for the sensor itself. The electromagnets which are simple, reliable, and inexpensive, when equipped with sensorless control will be capable of performing complex duties and will replace a series of expensive devices, which are also difficult to be manufactured and maintained. An experimental chapter reinforces the theoretical and computational work developed in the second part of this work. The idea of a fusion of the principle of electromagnetic actuators-as simple devices work with the other principle of magnetic amplifiers in the light of premagnetization and sensorless control is listed at the end of this research as leading to new actuators of increased complexity but achieving a higher payoff. In the light of some importance to the issues related to the design of high performance actuators, the chapters on thermal analysis, optimization process, and an integrated approach for numerical calculations together with the source codes developed by the author for this study are listed in the appendix section.

Ting, Yu-Liang

1998-11-01

179

Efficient Key-Frame Extraction and Video Analysis  

Microsoft Academic Search

Content based video indexing and retrieval has its foundations in the analyses of the prime video temporal structures. Consequently, technologies for video segmen- tation and key-frame extraction have become crucial for the development of advanced digital video systems. Conventional algorithms for video partitioning and key- frame extraction are mainly implemented autonomously. By focusing the analysis on the compressed video features,

Janko Calic; Ebroul Izquierdo

2002-01-01

180

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

181

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

182

Advances in Parallelization for Large Scale Oct-Tree Mesh Generation  

NASA Technical Reports Server (NTRS)

Despite great advancements in the parallelization of numerical simulation codes over the last 20 years, it is still common to perform grid generation in serial. Generating large scale grids in serial often requires using special "grid generation" compute machines that can have more than ten times the memory of average machines. While some parallel mesh generation techniques have been proposed, generating very large meshes for LES or aeroacoustic simulations is still a challenging problem. An automated method for the parallel generation of very large scale off-body hierarchical meshes is presented here. This work enables large scale parallel generation of off-body meshes by using a novel combination of parallel grid generation techniques and a hybrid "top down" and "bottom up" oct-tree method. Meshes are generated using hardware commonly found in parallel compute clusters. The capability to generate very large meshes is demonstrated by the generation of off-body meshes surrounding complex aerospace geometries. Results are shown including a one billion cell mesh generated around a Predator Unmanned Aerial Vehicle geometry, which was generated on 64 processors in under 45 minutes.

O'Connell, Matthew; Karman, Steve L.

2015-01-01

183

Efficient VLSI Architecture for Real-Time Motion Estimation in Advanced Video Coding Tiago Dias Nuno Roma Leonel Sousa  

E-print Network

with half-pixel accuracy in real-time for the 4CIF image format. I. INTRODUCTION A new efficient video coding systems. II. SINGLE ARRAY ARCHITECTURE FOR ME WITH SUB-PIXEL ACCURACY In this new type-II structure [1], whose block diagram for the case of half-pixel accuracy is depicted in Fig. 1(a), (2k - 1) 2

Sousa, Leonel

184

Multiplying video mixer system  

NASA Technical Reports Server (NTRS)

A multiplying video mixer system including a digital signal generator for generating at least one overlay signal and an attribute control bit corresponding to each of a plurality of pixels. A background signal generator generates input background signals to which the attribute control bits are applied to effect the input background signals with a desired opaque/transparent attribute. At least one video multiplier multiplies the overlay attribute signals and background signals to produce an output video signal having an amplitude equal to the product of the amplitudes of the overlay and background signals.

Heckt, Neil W. (Inventor)

1991-01-01

185

Advanced Research in Artificial Intelligence132 METHODOLOGY FOR LANGUAGE ANALYSIS AND GENERATION  

E-print Network

ACM Classification Keywords: I.2.7 Natural Language Processing Conference: The paper is selected fromAdvanced Research in Artificial Intelligence132 METHODOLOGY FOR LANGUAGE ANALYSIS AND GENERATION: The best results in the application of computer science systems to automatic translation are obtained

Cardeñosa, Jesús

186

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

EPA Science Inventory

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

187

Modeling heat generation and flow in the Advanced Neutron Source Corrosion Test Loop specimen  

Microsoft Academic Search

A finite difference computer code HEATING5 was used to model heat generation and flow in a typical experiment envisioned for the Advanced Neutron Source Corrosion Test Loop. The electrical resistivity and thermal conductivity of the test specimen were allowed to vary with local temperature, and the corrosion layer thickness was assigned along the length of the specimen in the manner

R. E. Pawel; D. W. Yarbrough

1988-01-01

188

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

PubMed Central

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

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

2014-01-01

189

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

190

Development of advanced neutron/gamma generators for imaging and active interrogation applications  

NASA Astrophysics Data System (ADS)

We report here on the development of neutron and photon sources for use in imaging and active interrogation applications, where there is a growing urgency for more advanced interrogation tools. These devices include high yield D-D, D-T and T-T fusion reaction based neutron generators and also low energy nuclear reaction based high-energy gamma generators. One common feature in these various devices is the use of a high-efficiency, RF-induction discharge ion source. This discharge method provides high plasma density for high output current, high atomic species from molecular gases for high efficiency neutron or gamma generation and long lifetime. Predictable discharge characteristics of these plasma generators allow accurate modeling for both the beam dynamics and for the heat loads at the target spot. Current status of the neutron and gamma generator development with experimental data will be presented.

Reijonen, J.; Andresen, N.; Gicquel, F.; Gough, R.; King, M.; Kalvas, T.; Leung, K.-N.; Lou, T.-P.; Vainionpaa, H.; Antolak, A.; Morse, D.; Doyle, B.; Miller, G.; Piestrup, M.

2007-04-01

191

Animal gaits from video  

Microsoft Academic Search

We present a method for animating 3D models of animals from existing live video sequences such as wild life documentaries. Videos are first segmented into binary images on which Principal Component Analysis (PCA) is applied. The time-varying coordinates of the images in the PCA space are then used to generate 3D animation. This is done through interpolation with Radial Basis

Laurent Favreau; Lionel Reveret; Christine Depraz; Marie-Paule Cani

2004-01-01

192

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

193

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

194

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

NASA Astrophysics Data System (ADS)

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

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

2014-05-01

195

Video summarization based tele-endoscopy: a service to efficiently manage visual data generated during wireless capsule endoscopy procedure.  

PubMed

Wireless capsule endoscopy (WCE) has great advantages over traditional endoscopy because it is portable and easy to use. More importantly, WCE combined with mobile computing ensures rapid transmission of diagnostic data to hospitals and enables off-site senior gastroenterologists to offer timely decision making support. However, during this WCE process, video data are produced in huge amounts, but only a limited amount of data is actually useful for diagnosis. The sharing and analysis of this video data becomes a challenging task due the constraints such as limited memory, energy, and communication capability. In order to facilitate efficient WCE data collection and browsing tasks, we present a video summarization-based tele-endoscopy service that estimates the semantically relevant video frames from the perspective of gastroenterologists. For this purpose, image moments, curvature, and multi-scale contrast are computed and are fused to obtain the saliency map of each frame. This saliency map is used to select keyframes. The proposed tele-endoscopy service selects keyframes based on their relevance to the disease diagnosis. This ensures the sending of diagnostically relevant frames to the gastroenterologist instead of sending all the data, thus saving transmission costs and bandwidth. The proposed framework also saves storage costs as well as the precious time of doctors in browsing patient's information. The qualitative and quantitative results are encouraging and show that the proposed service provides video keyframes to the gastroenterologists without discarding important information. PMID:25037715

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

2014-09-01

196

Some advanced parametric methods for assessing waveform distortion in a smart grid with renewable generation  

NASA Astrophysics Data System (ADS)

Power quality (PQ) disturbances are becoming an important issue in smart grids (SGs) due to the significant economic consequences that they can generate on sensible loads. However, SGs include several distributed energy resources (DERs) that can be interconnected to the grid with static converters, which lead to a reduction of the PQ levels. Among DERs, wind turbines and photovoltaic systems are expected to be used extensively due to the forecasted reduction in investment costs and other economic incentives. These systems can introduce significant time-varying voltage and current waveform distortions that require advanced spectral analysis methods to be used. This paper provides an application of advanced parametric methods for assessing waveform distortions in SGs with dispersed generation. In particular, the Standard International Electrotechnical Committee (IEC) method, some parametric methods (such as Prony and Estimation of Signal Parameters by Rotational Invariance Technique (ESPRIT)), and some hybrid methods are critically compared on the basis of their accuracy and the computational effort required.

Alfieri, Luisa

2015-12-01

197

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

198

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

199

Next-generation sequencing as a powerful motor for advances in the biological and environmental sciences.  

PubMed

Next-generation sequencing (NGS) provides unprecedented insight into (meta)genomes, (meta)transcriptomes (cDNA) and (meta)barcodes of individuals, populations and communities of Archaea, Bacteria and Eukarya, as well as viruses. This special issue combines reviews and original papers reporting technical and scientific advances in genomics and transcriptomics of non-model species, as well as quantification and functional analyses of biodiversity using NGS technologies of the second and third generations. In addition, certain papers also exemplify the transition from Sanger to NGS barcodes in molecular taxonomy. PMID:25736916

Faure, Denis; Joly, Dominique

2015-04-01

200

Creep-fatigue effects in structural materials used in advanced nuclear power generating systems  

SciTech Connect

Various aspects of time-dependent fatigue behavior of a number of structural alloys in use or planned for use in advanced nuclear power generating systems are reviewed. Materials included are types 304 and 316 stainless steel, Fe-2 1/4 Cr-1 Mo steel, and alloy 800H. Examples of environmental effects, including both chemical and physical interaction, are presented for a number of environments. The environments discussed are high-purity liquid sodium, high vacuum, air, impure helium, and irradiation damage, including internal helium bubble generation.

Brinkman, C.R.

1980-01-01

201

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

NASA Technical Reports Server (NTRS)

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

Robson, F. L.

1981-01-01

202

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

203

Recent Patents and Advances in the Next-Generation Sequencing Technologies  

Microsoft Academic Search

We are now witnessing a new genomic revolution due to the arrival and continued advancements in the next- generation high-throughput sequencing technologies, which encompass sequencing by synthesis including fluorescent in situ sequencing (FISSEQ) and pyrosequencing, sequencing by ligation including using polony amplification and supported oligonucleotide detection (SOLiD), sequencing by hybridization in combination with sequencing-by-ligation and nanopore technology, nanopore sequencing and

Biaoyang Lin; Jun Wang; Yin Cheng

2008-01-01

204

ATETV Biotech Videos  

NSDL National Science Digital Library

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

205

Low female birth weight and advanced maternal age programme alterations in next-generation blastocyst development.  

PubMed

Low birth weight is associated with an increased risk for adult disease development with recent studies highlighting transmission to subsequent generations. However, the mechanisms and timing of programming of disease transmission to the next generation remain unknown. The aim of this study was to examine the effects of low birth weight and advanced maternal age on second-generation preimplantation blastocysts. Uteroplacental insufficiency or sham surgery was performed in late-gestation WKY pregnant rats, giving rise to first-generation (F1) restricted (born small) and control offspring respectively. F1 control and restricted females, at 4 or 12 months of age, were naturally mated with normal males. Second-generation (F2) blastocysts from restricted females displayed reduced expression of genes related to growth compared with F2 control (P<0.05). Following 24?h culture, F2 restricted blastocysts had accelerated development, with increased total cell number, a result of increased trophectoderm cells compared with control (P<0.05). There were alterations in carbohydrate and serine utilisation in F2 restricted blastocysts and F2 restricted outgrowths from 4-month-old females respectively (P<0.05). F2 blastocysts from aged restricted females were developmentally delayed at retrieval, with reduced total cell number attributable to reduced trophectoderm number with changes in carbohydrate utilisation (P<0.05). Advanced maternal age resulted in alterations in a number of amino acids in media obtained from F2 blastocyst outgrowths (P<0.05). These findings demonstrate that growth restriction and advanced maternal age can alter F2 preimplantation embryo physiology and the subsequent offspring growth. PMID:25667431

Master, Jordanna S; Thouas, George A; Harvey, Alexandra J; Sheedy, John R; Hannan, Natalie J; Gardner, David K; Wlodek, Mary E

2015-05-01

206

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

207

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

PubMed Central

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

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

2013-01-01

208

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

209

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

210

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

211

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

212

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

213

External Magnetic Field Reduction Techniques for the Advanced Stirling Radioisotope Generator  

NASA Technical Reports Server (NTRS)

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

Niedra, Janis M.; Geng, Steven M.

2013-01-01

214

Biotechnology, Video Games, Rapid Prototyping  

NSDL National Science Digital Library

The ATETV project delivers web-based videos to connect students to careers in advanced technology. This episode of ATETV deals with biotechnology, video game design, and rapid prototyping. It can be viewed whole or in three segments: "Biotechnology Student Marina Watanabe on Why She Chose to Attend a Community College," "Video Game Design Student Brent Parsons on the Growing Market for Computer Simulations," and "What is Rapid Prototyping?" The running time for the full episode is 8:29.

215

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...

216

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

217

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

218

HGV2012: Leveraging Next-Generation Technology and Large Datasets to Advance Disease Research  

PubMed Central

The 13th International Meeting on Human Genome Variation and Complex Genome Analysis (HGV2012: Shanghai, China, 6th 8th September 2012) was a stimulating workshop where researchers from academia and industry explored the latest progress, challenges, and opportunities in genome variation research. Key themes included advancements in next-generation sequencing (NGS) technology, investigation of common and rare diseases, employing NGS in the clinic, utilizing large datasets that leverage biobanks and population-specific cohorts, and exploration of genomic features. PMID:23315969

Gonzaludo, Nina; Zheng, Hong-Xiang; Wang, Jiucun; Chanock, Stephen J.; Jin, Li; Scherer, Stephen; Wijmenga, Cisca; Kwok, Pui-Yan; Brookes, Anthony J.

2013-01-01

219

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

SciTech Connect

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

Robinson, Arthur L.

2002-08-14

220

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

221

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

222

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

NASA Astrophysics Data System (ADS)

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.; Suzuki, M.; Kuroda, H.

2014-05-01

223

Generation of optimum vertical profiles for an advanced flight management system  

NASA Technical Reports Server (NTRS)

Algorithms for generating minimum fuel or minimum cost vertical profiles are derived and examined. The option for fixing the time of flight is included in the concepts developed. These algorithms form the basis for the design of an advanced on-board flight management system. The variations in the optimum vertical profiles (resulting from these concepts) due to variations in wind, takeoff mass, and range-to-destination are presented. Fuel savings due to optimum climb, free cruise altitude, and absorbing delays enroute are examined.

Sorensen, J. A.; Waters, M. H.

1981-01-01

224

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

225

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

SciTech Connect

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

Not Available

1992-04-14

226

Advanced eddy current test signal analysis for steam generator tube defect classification and characterization  

NASA Astrophysics Data System (ADS)

Eddy Current Testing (ECT) is a Non-Destructive Examination (NDE) technique that is widely used in power generating plants (both nuclear and fossil) to test the integrity of heat exchanger (HX) and steam generator (SG) tubing. Specifically for this research, laboratory-generated, flawed tubing data were examined. The purpose of this dissertation is to develop and implement an automated method for the classification and an advanced characterization of defects in HX and SG tubing. These two improvements enhanced the robustness of characterization as compared to traditional bobbin-coil ECT data analysis methods. A more robust classification and characterization of the tube flaw in-situ (while the SG is on-line but not when the plant is operating), should provide valuable information to the power industry. The following are the conclusions reached from this research. A feature extraction program acquiring relevant information from both the mixed, absolute and differential data was successfully implemented. The CWT was utilized to extract more information from the mixed, complex differential data. Image Processing techniques used to extract the information contained in the generated CWT, classified the data with a high success rate. The data were accurately classified, utilizing the compressed feature vector and using a Bayes classification system. An estimation of the upper bound for the probability of error, using the Bhattacharyya distance, was successfully applied to the Bayesian classification. The classified data were separated according to flaw-type (classification) to enhance characterization. The characterization routine used dedicated, flaw-type specific ANNs that made the characterization of the tube flaw more robust. The inclusion of outliers may help complete the feature space so that classification accuracy is increased. Given that the eddy current test signals appear very similar, there may not be sufficient information to make an extremely accurate (>95%) classification or an advanced characterization using this system. It is necessary to have a larger database fore more accurate system learning.

McClanahan, James Patrick

227

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

228

Mosaicing MPEG video sequences  

NASA Astrophysics Data System (ADS)

Video Mosaicing is the process of obtaining single unified picture from multiple frames of a video sequence. It involves finding the geometric transformation parameters between frames and aligning them to form a single image representing content of full video. The proposed mosaicing method takes advantage of the information encoded by MPEG in the form of motion vectors, DCT blocks and the error information for generating the mosaics. Only the motion vectors corresponding to blocks of high activity region are considered for finding affine parameters. The feasibility of the method has been tested on panorama views from various MPEG sequences. The performance of proposed method was evaluated against the existing uncompressed domain methods.

Prakash, P. V. S. S.; Sharma, Raghunath R.; Prabhakara Rao, G. V.

2004-11-01

229

Discovery Videos  

NSDL National Science Digital Library

The use of digital video for instruction has many advantages. In many situations the only way to present some chemical phenomena is through the use of video. The two video lessons presented here are examples intended to supplement our article in the August 2003 issue of JCE.

230

On the definition of adapted audio/video profiles for high-quality video calling services over LTE/4G  

NASA Astrophysics Data System (ADS)

During the last decade, the important advances and widespread availability of mobile technology (operating systems, GPUs, terminal resolution and so on) have encouraged a fast development of voice and video services like video-calling. While multimedia services have largely grown on mobile devices, the generated increase of data consumption is leading to the saturation of mobile networks. In order to provide data with high bit-rates and maintain performance as close as possible to traditional networks, the 3GPP (The 3rd Generation Partnership Project) worked on a high performance standard for mobile called Long Term Evolution (LTE). In this paper, we aim at expressing recommendations related to audio and video media profiles (selection of audio and video codecs, bit-rates, frame-rates, audio and video formats) for a typical video-calling services held over LTE/4G mobile networks. These profiles are defined according to targeted devices (smartphones, tablets), so as to ensure the best possible quality of experience (QoE). Obtained results indicate that for a CIF format (352 x 288 pixels) which is usually used for smartphones, the VP8 codec provides a better image quality than the H.264 codec for low bitrates (from 128 to 384 kbps). However sequences with high motion, H.264 in slow mode is preferred. Regarding audio, better results are globally achieved using wideband codecs offering good quality except for opus codec (at 12.2 kbps).

Ndiaye, Maty; Quinquis, Catherine; Larabi, Mohamed Chaker; Le Lay, Gwenael; Saadane, Hakim; Perrine, Clency

2014-01-01

231

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

232

Social Properties of Mobile Video  

NASA Astrophysics Data System (ADS)

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

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

233

Advanced Soldier Thermoelectric Power System for Power Generation from Battlefield Heat Sources  

SciTech Connect

The U.S. military uses large amounts of fuel during deployments and battlefield operations. This project sought to develop a lightweight, small form-factor, soldier-portable advanced thermoelectric (TE) system prototype to recover and convert waste heat from various deployed military equipment (i.e., diesel generators/engines, incinerators, vehicles, and potentially mobile kitchens), with the ultimate purpose of producing power for soldier battery charging, advanced capacitor charging, and other battlefield power applications. The technical approach employed microchannel technology, a unique “power panel” approach to heat exchange/TE system integration, and newly-characterized LAST (lead-antimony-silver-telluride) and LASTT (lead-antimony-silver-tin-telluride) TE materials segmented with bismuth telluride TE materials in designing a segmented-element TE power module and system. This project researched never-before-addressed system integration challenges (thermal expansion, thermal diffusion, electrical interconnection, thermal and electrical interfaces) of designing thin “power panels” consisting of alternating layers of thin, microchannel heat exchangers (hot and cold) sandwiching thin, segmented-element TE power generators. The TE properties, structurally properties, and thermal fatigue behavior of LAST and LASTT materials were developed and characterized such that the first segmented-element TE modules using LAST / LASTT materials were fabricated and tested at hot-side temperatures = 400 °C and cold-side temperatures = 40 °C. LAST / LASTT materials were successfully segmented with bismuth telluride and electrically interconnected with diffusion barrier materials and copper strapping within the module electrical circuit. A TE system design was developed to produce 1.5-1.6 kW of electrical energy using these new TE modules from the exhaust waste heat of 60-kW Tactical Quiet Generators as demonstration vehicles.

Hendricks, Terry J.; Hogan, Tim; Case, Eldon D.; Cauchy, Charles J.

2010-09-01

234

Advances in understanding the cell types and approaches used for generating induced pluripotent stem cells.  

PubMed

Successfully reprogramming somatic cells to a pluripotent state generates induced pluripotent stem (iPS) cells (or iPSCs), which have extensive self-renewal capacity like embryonic stem cells (ESCs). iPSCs can also generate daughter cells that can further undergo differentiation into various lineages or terminally differentiate to reach their final functional state. The discovery of how to produce iPSCs opened a new field of stem cell research with both intellectual and therapeutic benefits. The huge potential implications of disease-specific or patient-specific iPSCs have impelled scientists to solve problems hindering their applications in clinical medicine, especially the issues of convenience and safety. To determine the range of tissue types amenable to reprogramming as well as their particular characteristics, cells from three embryonic germ layers have been assessed, and the advantages that some tissue origins have over fibroblast origins concerning efficiency and accessibility have been elucidated. To provide safe iPSCs in an efficient and convenient way, the delivery systems and combinations of inducing factors as well as the chemicals used to generate iPSCs have also been significantly improved in addition to the efforts on finding better donor cells. Currently, iPSCs can be generated without c-Myc and Klf4 oncogenes, and non-viral delivery integration-free chemically mediated reprogramming methods have been successfully employed with relatively satisfactory efficiency. This paper will review recent advances in iPS technology by highlighting tissue origin and generation of iPSCs. The obstacles that need to be overcome for clinical applications of iPSCs are also discussed. PMID:25037625

Li, Jun; Song, Wei; Pan, Guangjin; Zhou, Jun

2014-07-19

235

Advanced oxidation protein products are generated by bovine neutrophils and inhibit free radical production in vitro.  

PubMed

Despite the recognised importance of oxidative stress in the health and immune function of dairy cows, protein oxidation markers have been poorly studied in this species. The current study aimed to characterise markers of protein oxidation generated by activated bovine neutrophils and investigate the biological effects of advanced oxidation protein products (AOPP) on bovine neutrophils. Markers of protein oxidation (AOPP, dityrosines and carbonyls) were measured in culture medium containing bovine serum albumin (BSA) exposed to neutrophils. The effect of AOPP-BSA on generation of reactive oxygen species (ROS) was assessed by chemiluminescence. Activation of caspases-3, -8 and -9 and the presence of DNA laddering were used as apoptosis markers. Greater amounts of AOPP were generated by phorbol myristate acetate (PMA)-activated than non-activated neutrophils (1.46 ± 0.13 vs. 0.75 ± 0.13 nmol/mg protein, respectively; P<0.05). Activated neutrophils and hypochlorous acid generated slightly different patterns of oxidized protein markers. Exposure to AOPP-BSA did not stimulate ROS production. Activated neutrophils generated a lesser amount of ROS when incubated with AOPP-BSA (P<0.001). Activation with PMA induced a loss of viable neutrophils after 3h, which was greater with AOPP-BSA incubation (P<0.05). Detectable amounts of active caspases-3, -8 and -9 were found in nearly all samples but differences in caspase activation or DNA laddering were not observed comparing treatment groups. Apoptosis was unlikely to be responsible for the greater loss of PMA-activated neutrophils cultured in AOPP-BSA and it is possible that primary necrosis occurred. The results suggest that accumulation of oxidized proteins at an inflammatory site might result in a progressive reduction of neutrophil viability. PMID:24291143

Bordignon, Milena; Da Dalt, Laura; Marinelli, Lieta; Gabai, Gianfranco

2014-01-01

236

Representing videos in tangible products  

NASA Astrophysics Data System (ADS)

Videos can be taken with nearly every camera, digital point and shoot cameras, DSLRs as well as smartphones and more and more with so-called action cameras mounted on sports devices. The implementation of videos while generating QR codes and relevant pictures out of the video stream via a software implementation was contents in last years' paper. This year we present first data about what contents is displayed and how the users represent their videos in printed products, e.g. CEWE PHOTOBOOKS and greeting cards. We report the share of the different video formats used, the number of images extracted out of the video in order to represent the video, the positions in the book and different design strategies compared to regular books.

Fageth, Reiner; Weiting, Ralf

2014-03-01

237

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

238

Advanced Stirling Radioisotope Generator Engineering Unit 2 (ASRG EU2) Final Assembly  

NASA Technical Reports Server (NTRS)

NASA Glenn Research Center (GRC) has recently completed the assembly of a unique Stirling generator test article for laboratory experimentation. Under the Advanced Stirling Radioisotope Generator (ASRG) flight development contract, NASA GRC initiated a task to design and fabricate a flight-like generator for in-house testing. This test article was given the name ASRG Engineering Unit 2 (EU2) as it was effectively the second engineering unit to be built within the ASRG project. The intent of the test article was to duplicate Lockheed Martin's qualification unit ASRG design as much as possible to enable system-level tests not previously possible at GRC. After the cancellation of the ASRG flight development project, the decision was made to continue the EU2 build, and make use of a portion of the hardware from the flight development project. GRC and Lockheed Martin engineers collaborated to develop assembly procedures, leveraging the valuable knowledge gathered by Lockheed Martin during the ASRG development contract. The ASRG EU2 was then assembled per these procedures at GRC with Lockheed Martin engineers on site. The assembly was completed in August 2014. This paper details the components that were used for the assembly, and the assembly process itself.

Oriti, Salvatore M.

2015-01-01

239

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

240

The Generation-X Vision Mission Study and Advanced Mission Concept  

NASA Astrophysics Data System (ADS)

The Generation-X (Gen-X) mission was selected as one of NASA's Vision Missions as a concept for a next generation X-ray telescope designed to study the very early universe with 1000-times greater sensitivity than current X-ray telescopes. The mission has also been proposed as an Advanced Mission Concept Study (AMCS) to further define the technology development plan and mission design. The scientific goals for Gen-X include studying the first generations of stars and black holes in the epoch z=10-20, the evolution of black holes and galaxies from high z to the present, the chemical evolution of the universe and the properties of matter under extreme conditions. The key parameters required to meet these goals define a challenging mission and include an effective area of 50 m2 at 1 keV, and an angular resolution (HPD) of 0.1 arcsec over an energy band of 0.1-10 keV. The required effective area implies that extremely lightweight grazing incidence X-ray optics must be developed. To achieve the required areal density of at least 100 times lower than in Chandra, thin ( 0.1 mm) mirrors that have active on-orbit figure control are required. We present the major findings from the Gen-X Vision Mission Study and a streamlined mission concept enabled by the Ares V launch capability, as proposed in response to the AMSC call.

Brissenden, Roger J. V.; Generation-X Team

2008-03-01

241

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

SciTech Connect

For the first time since the early 1990's, the U.S. Department of Energy has long term research and development programs in both nuclear fission and nuclear fusion, the Generation IV program and the ARIES program, respectively. The Generation IV program has introduced a safety goal for future fission reactor systems that has long been reflected in the ARIES mission: no off-site emergency response to any design basis accident. This change, in concert with the overall departure from light water reactor technology, will drive a change in the regulatory framework for both Generation IV reactors and fusion power plants of the future. Further, both fission and fusion power plants will have to compete in similar future energy markets with uncertainties in energy prices and the development of alternative energy products. Enabling the success of nuclear energy, advanced materials will be a cornerstone to both programs, driven both by higher temperatures and heat fluxes and by a desire for longer lifetimes in high radiation environments. The synergies created by these increasingly parallel programs open the door for renewed collaborations that will increase the total effectiveness of research needed in both.

Wilson, Paul P.H.; Allen, Todd R.; El-Guebaly, Laila A. [University of Wisconsin-Madison (United States)

2005-04-15

242

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

243

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

244

Informative frame classification for endoscopy video.  

PubMed

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 all have a tiny video camera at the tip. During an endoscopic procedure, the tiny video camera generates a video signal of the interior of the human organ, which is displayed on a monitor for real-time analysis by the physician. However, many out-of-focus frames are present in endoscopy videos because current endoscopes are equipped with a single, wide-angle lens that cannot be focused. We need to distinguish the out-of-focus frames from the in-focus frames to utilize the information of the out-of-focus and/or the in-focus frames for further automatic or semi-automatic computer-aided diagnosis (CAD). This classification can reduce the number of images to be viewed by a physician and to be analyzed by a CAD system. We call an out-of-focus frame a non-informative frame and an in-focus frame an informative frame. The out-of-focus frames have characteristics that are different from those of in-focus frames. In this paper, we propose two new techniques (edge-based and clustering-based) to classify video frames into two classes, informative and non-informative frames. However, because intensive specular reflections reduce the accuracy of the classification we also propose a specular reflection detection technique, and use the detected specular reflection information to increase the accuracy of informative frame classification. Our experimental studies indicate that precision, sensitivity, specificity, and accuracy for the specular reflection detection technique and the two informative frame classification techniques are greater than 90% and 95%, respectively. PMID:17329146

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

2007-04-01

245

Transcriptomic analysis of Staphylococcus aureus using microarray and advanced next-generation RNA-seq technologies.  

PubMed

The transcriptome has shown tremendous potential for the comprehensive investigation of gene expression profiles and transcriptional levels in comparative biology, the identification of regulatory mechanism of transcriptional regulators, and the evaluation of target gene for developing new chemotherapeutic agents, vaccine, and diagnostic methods. The traditional microarray and advanced next-generation RNA sequencing technologies (RNA-seq) provide powerful and effective tools for the determination of the transcriptome of bacterial cells. In this chapter, we provide a detailed protocol for scientists who want to investigate gene expression profiles by performing microarray and/or RNA-seq analysis, including different RNA purification methods, mRNA enrichment, decontamination, cDNA synthesis, fragmentation, biotin labeling for hybridization using Affymetrix Staphylococcus aureus chips, quantitative real-time reverse transcription PCR, and RNA-seq data analysis. PMID:24085699

Lei, Ting; Becker, Aaron; Ji, Yinduo

2014-01-01

246

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

NASA Technical Reports Server (NTRS)

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

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

2002-01-01

247

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

248

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

249

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

250

Advancing the development of glycated protein biosensing technology: next-generation sensing molecules.  

PubMed

Research advances in biochemical molecules have led to the development of convenient and reproducible biosensing molecules for glycated proteins, such as those based on the enzymes fructosyl amino acid oxidase (FAOX) or fructosyl peptide oxidase (FPOX). Recently, more attractive biosensing molecules with potential applications in next-generation biosensing of glycated proteins have been aggressively reported. We review 2 such molecules, fructosamine 6-kinase (FN6K) and fructosyl amino acid-binding protein, as well as their recent applications in the development of glycated protein biosensing systems. Research on FN6K and fructosyl amino acid-binding protein has been opening up new possibilities for the development of highly sensitive and proteolytic-digestion-free biosensing systems for glycated proteins. PMID:25627465

Kameya, Miho; Sakaguchi-Mikami, Akane; Ferri, Stefano; Tsugawa, Wakako; Sode, Koji

2015-03-01

251

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

252

New generation of cryogen free advanced superconducting magnets for neutron scattering experiments  

NASA Astrophysics Data System (ADS)

Recent advances in superconducting technology and cryocooler refrigeration have resulted in a new generation of advanced superconducting magnets for neutron beam applications. These magnets have outstanding parameters such as high homogeneity and stability at highest magnetic fields possible, a reasonably small stray field, low neutron scattering background and larger exposure to neutron detectors. At the same time the pulse tube refrigeration technology provides a complete re-condensing regime which allows to minimise the requirements for cryogens without introducing additional noise and mechanical vibrations. The magnets can be used with dilution refrigerator insert which expands the temperature range from 20mK to 300K. Here we are going to present design, test results and the operational data of the 14T magnet for neutron diffraction and the 9T wide angle chopper magnet for neutron spectroscopy developed by Oxford Instruments in collaboration with ISIS neutron source. First scientific results obtained from the neutron scattering experiments with these magnets are also going to be discussed.

Kirichek, O.; Brown, J.; Adroja, D. T.; Manuel, P.; Kouzmenko, G.; Bewley, R. I.; Wotherspoon, R.

2012-12-01

253

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

254

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

255

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

NASA Astrophysics Data System (ADS)

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

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

2009-05-01

256

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.

257

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

258

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

259

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.

260

Dashboard Videos  

NASA Astrophysics Data System (ADS)

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

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

2012-11-01

261

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

SciTech Connect

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

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

2013-10-01

262

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

263

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

264

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

265

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

NASA Astrophysics Data System (ADS)

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

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

2008-12-01

266

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

Federal Register 2010, 2011, 2012, 2013, 2014

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

2011-04-18

267

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

268

GLOBE Videos  

NSDL National Science Digital Library

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

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

269

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

270

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

271

Analysis of Pulsed Laser-Generated Impulse in AN Advanced Airbreathing Thruster.  

NASA Astrophysics Data System (ADS)

This thesis describes the study of an advanced beam-powered propulsion system, called an External Radiation -Heated (ERH) thruster. The repetitively-pulsed, airbreathing engine develops thrust by expanding high pressure, radiation -heated gas over an annular shroud surface. The blast waves are generated by laser radiation heating of air using Laser Supported Detonation (LSD) waves. The phenomenology of LSD waves will be described in detail, as will the blast waves and resultant impulse they produce. Analytical simulation of the ERH thruster is accomplished with a one-dimensional model of blast waves propagating uniformly and radially outward from a laser -generated "line source" of high pressure, high temperature gas. Cylindrical blast wave scaling relationships developed by Sedov are employed in this model. The possibility of including other physical phenomena (e.g., viscosity, radiation, conduction or real gas effects) in the analysis will be reviewed. The analyses for the ERH thruster model are performed for a sample vehicle point design. This vehicle, known as the "Lightcraft Technology Demonstrator" (LTD), may be constructed within the next five years to illustrate the potential of Earth-to-Orbit laser propulsion. The external flow over the LTD vehicle was analyzed to determine basic drag characteristics, inlet total pressure recovery and captured air mass flow rate--all projected as functions of flight Mach number and altitude. The ERH thruster performance analysis indicates that the optimum LTD inlet air gap is about 3 cm around the 100 cm diameter centerbody, for transonic "refresh" air flow over the impulse surface. In this analysis, the principal indicator used to predict engine performance was the "impulse coupling coefficient (CC)"; i.e., the thrust developed per unit laser power input. Coupling coefficients up to 600-700 Newtons/Megawatt were found to be feasible, which are an order of magnitude larger than those for laser-heated rockets. For maximum developed thrust, laser pulse energies fell in the range of 25-50 kilojoules for pulse repetition frequencies of 1-10 kilohertz. The associated laser pulse durations ranged from 10 to several hundred nanoseconds. In the CC performance sensitivity studies, incident laser intensity was varied from 5 times 10^8 to 10 ^{10} W/cm^2. The promising results reported for the ERH thruster in this thesis support the case for continuing research on this advanced airbreathing engine.

Richard, Jacques Constant

272

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

Microsoft Academic Search

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

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

2009-01-01

273

Geospatial video for field data collection  

Microsoft Academic Search

Geospatial video, also known as mobile mapping or spatial video, is an emerging technology that combines Global Positioning Systems (GPS) with video. This approach enables increased efficiency in field data collection, as well as the ability to survey locations over multiple time periods in order to analyze spatiotemporal phenomena. In addition, unlike existing survey methods, this approach generates archival data

Jacqueline W. Mills; Andrew Curtis; Barrett Kennedy; S. Wright Kennedy; Jay D. Edwards

2010-01-01

274

The Diver Project: Interactive Digital Video Repurposing  

Microsoft Academic Search

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. Users can post their Dives to the WebDiver server system to generate active collaboration, further repurposing, and discussion. Although our current work focuses on video records in learning research and educational practices,

Roy Pea; Michael Mills; Joseph Rosen; Kenneth Dauber; Wolfgang Effelsberg; Eric Hoffert

2004-01-01

275

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

276

Genetic relationships in advanced generation hybrids derived from crosses between Texas and Kentucky bluegrass using ISSR markers  

Technology Transfer Automated Retrieval System (TEKTRAN)

Fertile, advanced generation hybrids derived from crosses between Texas (Poa arachnifera Torr.) and Kentucky (Poa pratensis L.) bluegrass have been selected. The hybrids are currently being evaluated for low-input turf potential. Since they are derived from hand-harvested seed from first-generati...

277

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

278

Advancement via Individual Determination (AVID) at a Postsecondary Institution: Support for First-Generation College-Goers  

ERIC Educational Resources Information Center

This study examines how a selected Hispanic-Serving Institution is implementing Advancement Via Individual Determination as a strategy for improving retention and time to graduation for 1st-generation Hispanic college students. A quasi-experimental design approach was used in which the retention rates and 1st-semester grade point averages of a…

Watt, Karen M.; Butcher, Jennifer; Ramirez, E. Fidel

2013-01-01

279

Video classification using speaker identification  

NASA Astrophysics Data System (ADS)

Video content characterization is a challenging problem in video databases. The aim of such characterization is to generate indices that can describe a video clip in terms of objects and their actions in the clip. Generally, such indices are extracted by performing image analysis on the video clips. Many such indices can also be generated by analyzing the embedded audio information of video clips. Indices pertaining to context, scene emotion, and actors or characters present in a video clip appear especially suitable for generation via audio analysis techniques of keyword spotting, and speech and speaker recognition. In this paper, we examine the potential of speaker identification techniques for characterizing video clips in terms of actors present in them. We describe a three-stage processing system consisting of a shot boundary detection stage, an audio classification stage, and a speaker identification stage to determine the presence of different actors in isolated shots. Experimental results using the movie A Few Good Men are presented to show the efficacy of speaker identification for labeling video clips in terms of persons present in them.

Patel, Nilesh V.; Sethi, Ishwar K.

1997-01-01

280

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

281

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

282

Application of next-generation sequencing in clinical oncology to advance personalized treatment of cancer  

PubMed Central

With the development and improvement of new sequencing technology, next-generation sequencing (NGS) has been applied increasingly in cancer genomics research over the past decade. More recently, NGS has been adopted in clinical oncology to advance personalized treatment of cancer. NGS is used to identify novel and rare cancer mutations, detect familial cancer mutation carriers, and provide molecular rationale for appropriate targeted therapy. Compared to traditional sequencing, NGS holds many advantages, such as the ability to fully sequence all types of mutations for a large number of genes (hundreds to thousands) in a single test at a relatively low cost. However, significant challenges, particularly with respect to the requirement for simpler assays, more flexible throughput, shorter turnaround time, and most importantly, easier data analysis and interpretation, will have to be overcome to translate NGS to the bedside of cancer patients. Overall, continuous dedication to apply NGS in clinical oncology practice will enable us to be one step closer to personalized medicine. PMID:22980418

Guan, Yan-Fang; Li, Gai-Rui; Wang, Rong-Jiao; Yi, Yu-Ting; Yang, Ling; Jiang, Dan; Zhang, Xiao-Ping; Peng, Yin

2012-01-01

283

Video Visuals.  

ERIC Educational Resources Information Center

A good training video has a focused objective, well-written script, clear sound track, and visuals that enhance the communication of the message. Good visuals depend on lighting, camera angles, continuity, and motivation for the scene. (SK)

Schleger, Peter R.

1991-01-01

284

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

285

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 â??Video Nationâ?. 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.

286

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

287

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

288

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

289

Video-based crowd synthesis.  

PubMed

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

Flagg, Matthew; Rehg, James M

2013-11-01

290

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

291

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

SciTech Connect

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

None

2011-12-01

292

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

293

A Multiparent Advanced Generation Inter-Cross to Fine-Map Quantitative Traits in Arabidopsis thaliana  

PubMed Central

Identifying natural allelic variation that underlies quantitative trait variation remains a fundamental problem in genetics. Most studies have employed either simple synthetic populations with restricted allelic variation or performed association mapping on a sample of naturally occurring haplotypes. Both of these approaches have some limitations, therefore alternative resources for the genetic dissection of complex traits continue to be sought. Here we describe one such alternative, the Multiparent Advanced Generation Inter-Cross (MAGIC). This approach is expected to improve the precision with which QTL can be mapped, improving the outlook for QTL cloning. Here, we present the first panel of MAGIC lines developed: a set of 527 recombinant inbred lines (RILs) descended from a heterogeneous stock of 19 intermated accessions of the plant Arabidopsis thaliana. These lines and the 19 founders were genotyped with 1,260 single nucleotide polymorphisms and phenotyped for development-related traits. Analytical methods were developed to fine-map quantitative trait loci (QTL) in the MAGIC lines by reconstructing the genome of each line as a mosaic of the founders. We show by simulation that QTL explaining 10% of the phenotypic variance will be detected in most situations with an average mapping error of about 300 kb, and that if the number of lines were doubled the mapping error would be under 200 kb. We also show how the power to detect a QTL and the mapping accuracy vary, depending on QTL location. We demonstrate the utility of this new mapping population by mapping several known QTL with high precision and by finding novel QTL for germination data and bolting time. Our results provide strong support for similar ongoing efforts to produce MAGIC lines in other organisms. PMID:19593375

Kover, Paula X.; Valdar, William; Trakalo, Joseph; Scarcelli, Nora; Ehrenreich, Ian M.; Purugganan, Michael D.; Durrant, Caroline; Mott, Richard

2009-01-01

294

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

295

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

296

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

NASA Astrophysics Data System (ADS)

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

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

2014-01-01

297

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

NASA Technical Reports Server (NTRS)

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

Barta, Daniel J.

2012-01-01

298

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

299

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

300

An interactive comic book presentation for exploring video  

Microsoft Academic Search

This paper presents a method for generating compact pictorial summarizations of video. We developed a novel approach for selecting still images from a video suitable for summarizing the video and for providing entry points into it. Images are laid out in a compact, visually pleasing display reminiscent of a comic book or Japanese manga. Users can explore the video by

John S. Boreczky; Andreas Girgensohn; Gene Golovchinsky; Shingo Uchihashi

2000-01-01

301

Kinetics of the upper limb during table tennis topspin forehands in advanced and intermediate players  

Microsoft Academic Search

The purpose of this study was to determine the significance of mechanical energy generation and transfer in the upper limb in generating the racket speed during table tennis topspin forehands. Nine advanced and eight intermediate table tennis players performed the forehand stroke at maximum effort against light and heavy backspin balls. Five high-speed video cameras operating at 200 fps were used

Yoichi Iino; Takeji Kojima

2011-01-01

302

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

303

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

304

The development and use of radionuclide generators in nuclear medicine -- recent advances and future perspectives  

SciTech Connect

Although the trend in radionuclide generator research has declined, radionuclide generator systems continue to play an important role in nuclear medicine. Technetium-99m obtained from the molybdenum-99/technetium-99m generator system is used in over 80% of all diagnostic clinical studies and there is increasing interest and use of therapeutic radioisotopes obtained from generator systems. This paper focuses on a discussion of the major current areas of radionuclide generator research, and the expected areas of future research and applications.

Knapp, F.F. Jr.

1998-03-01

305

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

NASA Technical Reports Server (NTRS)

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

Crook, Andrew J.; Delaney, Robert A.

1991-01-01

306

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

307

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

308

State Skill Standards: Digital Video & Broadcast Production  

ERIC Educational Resources Information Center

The standards in this document are for digital video and broadcast production programs and are designed to clearly state what the student should know and be able to do upon completion of an advanced high-school program. Digital Video and Broadcast Production is a program that consists of the initial fundamentals and sequential courses that prepare…

Bullard, Susan; Tanner, Robin; Reedy, Brian; Grabavoi, Daphne; Ertman, James; Olson, Mark; Vaughan, Karen; Espinola, Ron

2007-01-01

309

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

310

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

311

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

Cancer.gov

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

312

Second Generation Advanced Reburning for High Efficiency N0x Control  

SciTech Connect

Energy and Environmental Research Corporation is developing a family of high efficiency and low cost NO{sub x} control technologies for coal fired utility boilers based on Advanced Reburning (AR), a synergistic integration of basic reburning with injection of an N-agent. In conventional AR, injection of the reburn fuel is followed by simultaneous N-agent and overfire air injection. The second generation AR systems incorporate several components which can be used in different combinations. These components include: (1) Reburning Injection of the reburn fuel and overfire air. (2) N-agent Injection The N-agent (ammonia or urea) can be injected at different locations: into the reburning zone, along with the overfire air, and downstream of the overfire air injection. (3) N-agent Promotion Several sodium compounds can considerably enhance the NO{sub x} control from N-agent injection. These ''promoters'' can be added to aqueous N-agents. (4) Two Stages of N-agent Injection and Promotion Two N-agents with or without promoters can be injected at different locations for deeper NO{sub x} control. AR systems are intended for post-RACT applications in ozone non-attainment areas where NO{sub x} control in excess of 80% is required. AR will provide flexible installations that allow NO{sub x} levels to be lowered when regulations become more stringent. The total cost of NO{sub x} control for AR systems is approximately half of that for SCR. Experimental and kinetic modeling results for development of these novel AR systems are presented. Tests have been conducted in a 1.0 MMBtu/hr Boiler Simulator Facility with coal as the main fuel and natural gas as the reburning fuel. The results show that high efficiency NO{sub x} control, in the range 84-95%, can be achieved with various elements of AR. A comparative byproduct emission study was performed to compare the emissions from different variants of AR with commercial technologies (reburning and SNCR). For each technology sampling included: CO, SO{sub 2}, N{sub 2}O, total hydrocarbons, NH{sub 3}, HCN, SO{sub 3}, fly ash mass loading and size distribution, PM10, and carbon in ash. AR technologies do not generate significant byproduct emissions in comparison with basic reburning and SNCR processes under similar conditions. In most cases, byproduct emissions were found to be lower for the AR technologies. Kinetic modeling predictions qualitatively explain the experimental trends observed in the combustion tests. The detailed reaction mechanism can describe the interaction of NO and ammonia in the reburning and overfire air zones, the effect of mixing times, and the sodium promotion effect.

Zamansky, Vladimir M.; Maly, Peter, M.; Sheldon, Mark; Seeker, W. Randall; Folsom, Blair A.

1997-12-31

313

Advanced control for power density maximization of the brushless DC generator  

E-print Network

............................................................ 47 III Comparison of the electrical output power of the BLDC generator.............. 58 IV Specification of the TMS320F243 DSP ........................................................ 62 V Specification of the BLDC generator...

Lee, Hyung-Woo

2005-02-17

314

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

315

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

316

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

317

Recent Advance of Hydride Generation–Analytical Atomic Spectrometry: Part I—Technique Development  

Microsoft Academic Search

Hydride generation is the most popular and widely used chemical vapor generation technique and is interesting to analytical chemists as an effective sample introduction method, especially for elemental determination and speciation analysis by analytical atomic spectrometry. The present review provides a literature survey on the hydride generation technique coupled to analytical atomic spectrometry during the past several years, covering the

Zhou Long; Yamin Luo; Chengbin Zheng; Pengchi Deng; Xiandeng Hou

2012-01-01

318

Recent Advance of Hydride Generation-Analytical Atomic Spectrometry: Part I-Technique Development  

Microsoft Academic Search

Hydride generation is the most popular and widely used chemical vapor generation, which is always interesting to analytical chemists as an effective sample introduction method, especially for elemental determination and speciation analysis by analytical atomic spectrometry. The present review provides a literature survey on the hydride generation technique coupled to analytical atomic spectrometry during the past several years, covering the

Zhou Long; Yamin Luo; Chengbin Zheng; Pengchi Deng; Xiandeng Hou

2012-01-01

319

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.

320

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

321

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

322

Online Smoothing of Variable-Bit-Rate Streaming Video  

Microsoft Academic Search

Bandwidth smoothing techniques for stored video perform end to end workahead transmission of frames into the client playback buffer, in advance of their display times. Such techniques are very effective in reducing the burstiness of the bandwidth requirements for transmitting compressed, stored video. This paper addresses online bandwidth smoothing for a growing number of streaming video applications such as newscasts,

Subhabrata Sen; Jennifer L. Rexford; Jayanta K. Dey; James F. Kurose; Donald F. Towsley

2000-01-01

323

Video Clips for Youtube: Collaborative Video Creation as an Educational Concept for Knowledge Acquisition and Attitude Change Related to Obesity Stigmatization  

ERIC Educational Resources Information Center

Mobile phones and advanced web-based video tools have pushed forward new paradigms for using video in education: Today, students can readily create and broadcast their own digital videos for others and create entirely new patterns of video-based information structures for modern online-communities and multimedia environments. This paradigm shift…

Zahn, Carmen; Schaeffeler, Norbert; Giel, Katrin Elisabeth; Wessel, Daniel; Thiel, Ansgar; Zipfel, Stephan; Hesse, Friedrich W.

2014-01-01

324

An advanced CCD emulator with 32MB image memory  

NASA Astrophysics Data System (ADS)

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

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

2012-07-01

325

Consumption of oxygen: a mitochondrial-generated progression signal of advanced cancer  

PubMed Central

Changes in mitochondrial genome such as mutation, deletion and depletion are common in cancer and can determine advanced phenotype of cancer; however, detailed mechanisms have not been elucidated. We observed that loss of mitochondrial genome reversibly induced overexpression and activation of proto-oncogenic Ras, especially K-Ras 4A, responsible for the activation of AKT and ERK leading to advanced phenotype of prostate and breast cancer. Ras activation was induced by the overexpression of 3-hydroxy-3-methyl-glutaryl-CoA reductase (HMGR), the rate-limiting enzyme of the mevalonate pathway. Hypoxia is known to induce proteasomal degradation of HMGR. Well differentiated prostate and breast cancer cells with high mitochondrial DNA content consumed a large amount of oxygen and induced hypoxia. Loss of mitochondrial genome reduced oxygen consumption and increased in oxygen concentration in the cells. The hypoxic-to-normoxic shift led to the overexpression of HMGR through inhibiting proteasomal degradation. Therefore, reduction of mitochondrial genome content induced overexpression of HMGR through hypoxic to normoxic shift and subsequently the endogenous induction of the mevalonate pathway activated Ras that mediates advanced phenotype. Reduction of mitochondrial genome content was associated with the aggressive phenotype of prostate cancer in vitro cell line model and tissue specimens in vivo. Our results elucidate a coherent mechanism that directly links the mitochondrial genome with the advanced progression of the disease. PMID:22258408

Cook, C C; Kim, A; Terao, S; Gotoh, A; Higuchi, M

2012-01-01

326

The mission of Sugarbeet Advancement is to generate research and utilize  

E-print Network

. The Sugarbeet Advancement Committee will be active in identifying research needs, conducting educational of the industry has been realized and producers have adopted the latest technology. Make no mistake; productive this document as a tool to help you make sound agronomic decisions. Industry cooperation in support of Sugarbeet

327

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

328

How Syntactic Reasoners Can Develop Understanding, Evaluate Conjectures, and Generate Counterexamples in Advanced Mathematics  

ERIC Educational Resources Information Center

This paper presents a case study of a highly successful student whose exploration of an advanced mathematical concept relies predominantly on syntactic reasoning, such as developing formal representations of mathematical ideas and making logical deductions. This student is observed as he learns a new mathematical concept and then completes…

Weber, Keith

2009-01-01

329

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

330

Hematopoietic specification from human pluripotent stem cells: current advances and challenges toward de novo generation of hematopoietic stem cells  

PubMed Central

Significant advances in cellular reprogramming technologies and hematopoietic differentiation from human pluripotent stem cells (hPSCs) have already enabled the routine production of multiple lineages of blood cells in vitro and opened novel opportunities to study hematopoietic development, model genetic blood diseases, and manufacture immunologically matched cells for transfusion and cancer immunotherapy. However, the generation of hematopoietic cells with robust and sustained multilineage engraftment has not been achieved. Here, we highlight the recent advances in understanding the molecular and cellular pathways leading to blood development from hPSCs and discuss potential approaches that can be taken to facilitate the development of technologies for de novo production of hematopoietic stem cells. PMID:24124087

2013-01-01

331

Dispatchable Distributed Generation Network - A New Concept to Advance DG Technologies  

Microsoft Academic Search

Renewable energy has been booming globally thanks to its economic, social, and environmental benefits. However, small distributed generation (DG) systems using renewable energy have not yet achieved a significant level of penetration. With deregulation of electricity market, policies have been available to facilitate interconnection of small distributed generators (DGs) with electric grids. However, dispatchability and reliability still present technical barriers

Yaosuo Xue; Liuchen Chang; Julian Meng

2007-01-01

332

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

333

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

334

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

335

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.... The advantage of hexagonal grids is that 1) hexagonal grids are visually more effective in covering every square region of the image, 2) using a large number of dots in each square region creates higher complex- ity, 3) artifacts are less visible...

Yu, Jin Nah

2004-09-30

336

Design studies for an advanced ECR ion source for multiply charged ion beam generation  

SciTech Connect

An innovative technique: for increasing ion source intensity is described which, in principle, could lead to significant advances in ECR ion source technology for multiply charged ion beam formation. The advanced concept design uses a minimum-B magnetic mirror geometry which consists of a multi-cusp, magnetic field, to assist in confining the plasma radially, a flat central field for tuning to the ECR resonant condition, and specially tailored min-or fields in the end zones to confine the plasma in the axial direction. The magnetic field is designed to achieve an axially symmetric plasma ``volume`` with constant mod-B, which extends over the length of the central field region. This design, which strongly contrasts w h the ECR ``surfaces`` characteristic of conventional ECR ion sources, results in dramatic increases in the absorption of RF power, thereby increasing the electron temperature and ``hot`` electron population within the ionization volume of the source.

Alton, G.D.

1994-10-01

337

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

338

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

339

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

340

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.

Ragusa, Jean; Vierow, Karen

2011-09-01

341

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

342

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

343

Advances in video game methods and reporting practices (but still room for improvement): a commentary on Strobach, Frensch, and Schubert (2012).  

PubMed

Strobach, Frensch, and Schubert (2012) presented evidence that action video game experience improves task-switching and reduces dual-task costs. Their design commendably adhered to many of the guidelines proposed by Boot, Blakely and Simons (2011) to overcome common method and interpretation problems in this literature. Adherence to these method guidelines is necessary in order to reduce the influence of demand characteristics, placebo effects, and underreporting that might otherwise produce false positive findings. In their paper, Strobach et al. (2012) appear to have misinterpreted some of these proposed guidelines, meaning that their methods did not eliminate possible sources of demand characteristics and differential placebo effects. At this important, early stage of video game research, reducing the likelihood of false positive findings is essential. In this commentary we clarify our methodological critiques and guidelines, identify ways in which this new study did and did not meet these guidelines, and discuss how these methodological issues should constrain the interpretation of the reported evidence. PMID:22964029

Boot, Walter R; Simons, Daniel J

2012-10-01

344

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

345

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

346

Optimizing Queries with Expensive Video Predicates Based on Estimation of Attribute Cardinality  

Microsoft Academic Search

With rapid advances in video processing technologies, video data increased rapidly and becomes popular in our daily life for both professional and consumer applications, e.g., surveillance, education, entertainment. Such needs require the data management system not only can store and access the video content, but also able to optimize the queries with expensive video predications in an effective and efficient

Lisheng Yu; Jianmei Zhang; Shan Wang

2010-01-01

347

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

348

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

349

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

350

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

351

Recent Advance of Hydride Generation-Analytical Atomic Spectrometry: Part II- Analysis of Real Samples  

Microsoft Academic Search

As an extended discussion of Part I, this review provides a survey of the literature about the elemental and speciation analysis of hydride-forming and non-hydride forming elements in real samples by using hydride generation-analytical atomic spectrometry based on the recently developed technique summarized in Part I, with emphesis on the sample pretreatment methods and interference elimination.

Zhou Long; Chen Chen; Xiandeng Hou; Chengbin Zheng

2012-01-01

352

Recent Advance of Hydride Generation–Analytical Atomic Spectrometry: Part II—Analysis of Real Samples  

Microsoft Academic Search

Abstract: As an extended discussion of Part I, this review provides a survey of the literature about the elemental and speciation analysis of hydride-forming and non-hydride-forming elements in real samples by using hydride generation–analytical atomic spectrometry based on the recently developed technique summarized in Part I, with emphasis on the sample pretreatment methods and interference elimination.

Zhou Long; Chen Chen; Xiandeng Hou; Chengbin Zheng

2012-01-01

353

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.

354

Animal gaits from video: Comparative studies  

Microsoft Academic Search

We present a method for animating 3D models of animals from existing live video sequences such as wild life documentaries. Videos are first segmented into binary images on which principal component analysis (PCA) is applied. The time-varying coordinates of the images in the PCA space are then used to generate 3D animation. This is done through inter- polation with radial

Laurent Favreau; Lionel Revéret; Christine Depraz; Marie-paule Cani

2006-01-01

355

Digital Green: Participatory video for agricultural extension  

Microsoft Academic Search

Digital green is a research project that seeks to disseminate targeted agricultural information to small and marginal farmers in India using digital video. The unique components of digital green are (1) a participatory process for content production, (2) a locally generated digital video database, (3) human-mediated instruction for dissemination and training, and (4) regimented sequencing to initiate a new community.

Rikin Gandhi; Rajesh Veeraraghavan; Kentaro Toyama; Vanaja Ramprasad

2007-01-01

356

Promoting Academic Programs Using Online Videos  

ERIC Educational Resources Information Center

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

Clark, Thomas; Stewart, Julie

2007-01-01

357

Infant CPR Video Demonstration  

MedlinePLUS Videos and Cool Tools

Infant CPR Video Demonstration Video demonstration of CPR instruction for infants. RETURN TO MAIN PAGE These Videos Are For Educational Use Only And Are Not Authorized for Commercial Use. © 1998 - 2011 ...

358

Child CPR Video Demonstration  

MedlinePLUS Videos and Cool Tools

Child CPR Video Demonstration Video demonstration of standard CPR for children. RETURN TO MAIN PAGE These Videos Are For Educational Use Only And Are Not Authorized for Commercial Use. © 1998 - 2011 ...

359

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

SciTech Connect

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

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

2002-03-01

360

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

361

Education Tools: Nanotechnology Video Modules  

NSDL National Science Digital Library

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

362

Advances in bacterial transcriptome and transposon insertion-site profiling using second-generation sequencing.  

PubMed

The arrival of second-generation sequencing has revolutionized the study of bacteria within a short period. The sequence information generated from these platforms has helped in our understanding of bacterial development, adaptation and diversity and how bacteria cause disease. Furthermore, these technologies have quickly been adapted for high-throughput studies that were previously performed using DNA cloning or microarray-based applications. This has facilitated a more comprehensive study of bacterial transcriptomes through RNA sequencing (RNA-Seq) and the systematic determination of gene function by 'transposon monitoring'. In this review, we provide an outline of these powerful tools and the in silico analyses used in their application, and also highlight the biological questions being addressed in these approaches. PMID:21764162

Febrer, Melanie; McLay, Kirsten; Caccamo, Mario; Twomey, Kate B; Ryan, Robert P

2011-11-01

363

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

364

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

365

ADMESH: An advanced, automatic unstructured mesh generator for shallow water models  

NASA Astrophysics Data System (ADS)

In this paper, we present the development and application of a two-dimensional, automatic unstructured mesh generator for shallow water models called Admesh. Starting with only target minimum and maximum element sizes and points defining the boundary and bathymetry/ topography of the domain, the goal of the mesh generator is to automatically produce a high-quality mesh from this minimal set of input. From the geometry provided, properties such as local features, curvature of the boundary, bathymetric/topographic gradients, and approximate flow characteristics can be extracted, which are then used to determine local element sizes. The result is a high-quality mesh, with the correct amount of refinement where it is needed to resolve all the geometry and flow characteristics of the domain. Techniques incorporated include the use of the so-called signed distance function, which is used to determine critical geometric properties, the approximation of piecewise linear coastline data by smooth cubic splines, a so-called mesh function used to determine element sizes and control the size ratio of neighboring elements, and a spring-based force equilibrium approach used to improve the element quality of an initial mesh obtained from a simple Delaunay triangulation. Several meshes of shallow water domains created by the new mesh generator are presented.

Conroy, Colton J.; Kubatko, Ethan J.; West, Dustin W.

2012-12-01

366

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 ...

367

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

NASA Astrophysics Data System (ADS)

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

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

2013-02-01

368

The history and advances of reversible terminators used in new generations of sequencing technology.  

PubMed

DNA sequencing using reversible terminators, as one sequencing by synthesis strategy, has garnered a great deal of interest due to its popular application in the second-generation high-throughput DNA sequencing technology. In this review, we provided its history of development, classification, and working mechanism of this technology. We also outlined the screening strategies for DNA polymerases to accommodate the reversible terminators as substrates during polymerization; particularly, we introduced the "REAP" method developed by us. At the end of this review, we discussed current limitations of this approach and provided potential solutions to extend its application. PMID:23414612

Chen, Fei; Dong, Mengxing; Ge, Meng; Zhu, Lingxiang; Ren, Lufeng; Liu, Guocheng; Mu, Rong

2013-02-01

369

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

NASA Astrophysics Data System (ADS)

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.

1983-06-01

370

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

371

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

372

Application of high temperature air heaters to advanced power generation cycles  

NASA Astrophysics Data System (ADS)

Recent developments in ceramic composite materials open up the possibility of recuperative air heaters heating air to temperatures well above that 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 the 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.; Boss, W. H.; Chapman, J. N.

373

Arginine-derived advanced glycation end products generated in peptide-glucose mixtures during boiling.  

PubMed

Glycation refers to the reaction of amino groups, for example in proteins, with reducing sugars. Intermediately formed Amadori products can be degraded by oxidation (Maillard reactions) leading to a heterogeneous class of advanced glycation end-products (AGEs), especially during exposure to heat. AGEs are considered to be toxic in vivo due to their pronounced local and systemic inflammatory effects. At high temperatures, these reactions have been mostly investigated at the amino acid level. Here, we studied the formation of arginine-related AGEs in peptides under conditions simulating household cooking at physiological d-glucose concentrations. High quantities of AGE-modified peptides were produced within 15 min, especially glyoxal-derived products. The intermediately formed dihydroxy-imidazolidine yielded glyoxal- (Glarg) and methylglyoxal-derived hydro-imidazolinones (MG-H), with Glarg being further degraded to carboxymethyl-l-arginine (CMA). Carboxyethyl-l-arginine was not detected. The formation rates and yields were strongly increased in the presence of physiologically relevant concentrations of Fe(II)-ions and ascorbate. A nearby histidine residue increased the content of AGEs, whereas glutamic acid significantly reduced the CMA levels. PMID:24725187

Frolov, Andrej; Schmidt, Rico; Spiller, Sandro; Greifenhagen, Uta; Hoffmann, Ralf

2014-04-23

374

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

NASA Technical Reports Server (NTRS)

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.

1981-01-01

375

Advanced mask-to-mask overlay analysis for next generation technology node reticles  

NASA Astrophysics Data System (ADS)

Double Patterning Lithography (DPL) for next-generation wafer exposure is placing greater demands on the requirements for pattern placement accuracy on photomasks: the DPL mask pair must now meet the pattern placement specifications that a single mask was required to meet in previous generations. As a result, each mask in the mask pair must individually conform to much tighter mask registration specs. Minimizing all sources of systematic overlay error has become critical. In addition, the mask-to-mask overlay between the two masks comprising the DPL pair must be measured-a methodology shift from the current practice of referencing mask registration error only to design data. Characterizing mask-to-mask overlay error requires the ability to measure pattern placement errors using in-die structures on reticle pairs. Today's analysis methods do not allow for comparison of registration maps based on different site locations. This gap has created a lack of information about the true overlay impact of mask-to-mask registration errors on masks with few or no common features. A new mask-to-mask overlay analysis method is demonstrated that provides new flexibility for mask-to-mask comparison. This new method enables mask manufacturers to meet fab requirements for DPL, and it enables semiconductor manufacturers to verify if overlay deviations are within acceptable limits.

Roeth, Klaus-Dieter; Laske, Frank; Schmidt, Karl-Heinrich; Adam, Dieter; Ache, Oliver; Ilsen, David

2010-05-01

376

Stroke Surfaces: Temporally Coherent Artistic Animations from Video  

E-print Network

cartoon-styled animations from video. Throughout this work, our rationale has been to design a framework--we are able to generate animations in a wide variety of artistic styles, exhibiting a uniquely high degree of rendering complete cartoon-styled animations from video clips. Index Terms--Artistic rendering, video

Collomosse, John

377

Simulating Indirect Network Effects in the Video Game Market  

Microsoft Academic Search

Since the 1970s, seven generations of consoles have competed in the video games market. Today video game industry sales even surpass the box-office results of the movie industry. The history of video games provides numerous examples of former successful console vendors failing to establish technologically superior successors of their consoles. This is mostly due to dependencies of console manufacturers on

Jochen Strube; Sven Schade; Patrick Schmidt; Peter Buxmann

2007-01-01

378

Synvie: An Annotation System Based on Quotation of Video Scenes  

Microsoft Academic Search

†4 In this paper, we propose a mechanism which acquires semantics of video contents as anno- tations from related Weblog communities. In particular, we have implemented a Web-based tool which user can generate a Weblog entry quoting video scenes easily. This tool can acquire relationships which associate multiple video scenes with a document structure of a Weblog entry from editing

Daisuke Yamamoto; Tomoki Masuda; Katashi Nagao

379

Toward the Next Generation of Negative Symptom Assessments: The Collaboration to Advance Negative Symptom Assessment in Schizophrenia  

PubMed Central

Negative symptoms in schizophrenia are related to poor functional outcome, persistent over time, a source of burden for caregivers, and only minimally responsive to currently available medications. A major challenge to developing efficacious interventions concerns the valid and reliable assessment of negative symptoms. In a recent consensus statement on negative symptoms, a central recommendation was the need to develop new assessment approaches that address the limitations of existing instruments. In the current report, we summarize the background and rationale for the Collaboration to Advance Negative Symptom Assessment in Schizophrenia (CANSAS). The CANSAS project is an National Institute of Mental Health-funded multisite study that is constructing a next-generation negative symptom scale, the Clinical Assessment Interview for Negative Symptoms (CAINS). The CAINS is being developed within a data-driven iterative process that seeks to ensure the measure’s reliability, validity, and utility for both basic psychopathology and treatment development research. PMID:20861151

Blanchard, Jack J.; Kring, Ann M.; Horan, William P.; Gur, Raquel

2011-01-01

380

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

381

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

382

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

NASA Astrophysics Data System (ADS)

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, Karen J.

1994-12-01

383

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

384

Advancements in oxygen generation and humidity control by water vapor electrolysis  

NASA Technical Reports Server (NTRS)

Regenerative processes for the revitalization of manned spacecraft atmospheres or other manned habitats are essential for realization of long-term space missions. These processes include oxygen generation through water electrolysis. One promising technique of water electrolysis is the direct conversion of the water vapor contained in the cabin air to oxygen. This technique is the subject of the present program on water vapor electrolysis development. The objectives were to incorporate technology improvements developed under other similar electrochemical programs and add new ones; design and fabricate a mutli-cell electrochemical module and a testing facility; and demonstrate through testing the improvements. Each aspect of the water vapor electrolysis cell was reviewed. The materials of construction and sizing of each element were investigated analytically and sometime experimentally. In addition, operational considerations such as temperature control in response to inlet conditions were investigated. Three specific quantitative goals were established.

Heppner, D. B.; Sudar, M.; Lee, M. C.

1988-01-01

385

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

386

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

387

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

388

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

389

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

NASA Technical Reports Server (NTRS)

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

Kathong, Monchai; Tiwari, Surendra N.

1988-01-01

390

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

391

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

392

Volunteering ELI Video Competition  

E-print Network

Highlights Cedar Key Volunteering ELI Video Competition Notes from the Office The forget to join our new Facebook group "ELI Volunteer Opportunities" to get the most up-to-date information. ELI Video Competition This is completely separate from the ELI promotional video. This is a video

Pilyugin, Sergei S.

393

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

394

Video and Image Processing in Multimedia Systems (Video Processing)  

E-print Network

and retrieval techniques 8. Video scene analysis and video segmentation 9. Video processing using compressedCOT 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

Furht, Borko

395

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

NASA Astrophysics Data System (ADS)

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

Ishihara, Hidetaka

396

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

NASA Astrophysics Data System (ADS)

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

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

2005-05-01

397

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

398

Mosaics from MPEG-2 video  

NASA Astrophysics Data System (ADS)

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

Robertson, Mark A.; Heath, Thomas S.

2003-06-01

399

Status of the emerging ITU-T/H.264 / ISO/MPEG-4, Part 10 video coding standard  

NASA Astrophysics Data System (ADS)

We give a brief tour of the emerging joint ITU-T/H.264 | ISO/IEC MPEG-4, Part 10 ("AVC") video coding standard. Like its predecessors within ITU-T Recommendations, the draft H.264 standard was originally intended for videoconferencing applications; however, its superior performance over other contenders at a variety of rates and resolutions has led to its adoption by MPEG as the next generation video codec, MPEG-4, Part 10 (dubbed Advanced Video Codec - AVC). This powerful new codec design trades backward compatibility and increased encoder complexity for forward-looking performance and scope of applications. In this paper, we give a status report on this emerging standard, review elements of its current design, and provide some comparisons with the existing standards, MPEG-2, H.263, and MPEG-4 Advanced Simple Profile. Our analysis indicates that the draft H.264 standard offers compelling advantages over all existing video coding standards. It has the potential to redraw the landscape of consumer and enterprise video applications. It reached Final Committee Draft (FCD) status on July 26, 2002.

Topiwala, Pankaj N.

2002-11-01

400

An integrated scheme for automated video abstraction based on unsupervised cluster-validity analysis  

Microsoft Academic Search

Key frames and previews are two forms of a video abstract, widely used for various applications in video browsing and retrieval systems. We propose in this paper a novel method for generating these two abstract forms for an arbitrary video sequence. The underlying principle of the proposed method is the removal of the visual-content redundancy among video frames. This is

Alan Hanjalic; HongJiang Zhang

1999-01-01

401

Science Sampler: Commercial video games in the science classroom  

NSDL National Science Digital Library

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 tool. This article presents a list of potential video games for use in the middle school science classroom... [view full summary

Lauren Angelone

2010-02-01

402

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

403

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

404

NASA's Myriad Uses of Digital Video  

NASA Technical Reports Server (NTRS)

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

Grubbs, Rodney; Lindblom, Walt; George, Sandy

1999-01-01

405

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

406

47 CFR 79.3 - Video description of video programming.  

Code of Federal Regulations, 2010 CFR

...Telecommunication 4 2010-10-01 2010-10-01 false Video description of video programming. 79.3 Section 79.3 Telecommunication... BROADCAST RADIO SERVICES CLOSED CAPTIONING AND VIDEO DESCRIPTION OF VIDEO PROGRAMMING § 79.3...

2010-10-01

407

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 BRAFV600 (36%), NRAS (21%), TP53 (16%), BRAFNon-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 BRAFV600 and NRAS mutations. Melanomas with BRAFNon-V600mutations frequently harbored concurrent NRAS mutations (18%), which were rare in tumors with BRAFV600 mutations (1.6%). The prevalence of BRAFV600 and KIT mutations were significantly associated with melanoma subtypes, and BRAFV600 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 BRAFV600 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

408

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

409

An Eight-Parent Multiparent Advanced Generation Inter-Cross Population for Winter-Sown Wheat: Creation, Properties, and Validation  

PubMed Central

MAGIC populations represent one of a new generation of crop genetic mapping resources combining high genetic recombination and diversity. We describe the creation and validation of an eight-parent MAGIC population consisting of 1091 F7 lines of winter-sown wheat (Triticum aestivum L.). Analyses based on genotypes from a 90,000-single nucleotide polymorphism (SNP) array find the population to be well-suited as a platform for fine-mapping quantitative trait loci (QTL) and gene isolation. Patterns of linkage disequilibrium (LD) show the population to be highly recombined; genetic marker diversity among the founders was 74% of that captured in a larger set of 64 wheat varieties, and 54% of SNPs segregating among the 64 lines also segregated among the eight founder lines. In contrast, a commonly used reference bi-parental population had only 54% of the diversity of the 64 varieties with 27% of SNPs segregating. We demonstrate the potential of this MAGIC resource by identifying a highly diagnostic marker for the morphological character "awn presence/absence" and independently validate it in an association-mapping panel. These analyses show this large, diverse, and highly recombined MAGIC population to be a powerful resource for the genetic dissection of target traits in wheat, and it is well-placed to efficiently exploit ongoing advances in phenomics and genomics. Genetic marker and trait data, together with instructions for access to seed, are available at http://www.niab.com/MAGIC/. PMID:25237112

Mackay, Ian J.; Bansept-Basler, Pauline; Barber, Toby; Bentley, Alison R.; Cockram, James; Gosman, Nick; Greenland, Andy J.; Horsnell, Richard; Howells, Rhian; O’Sullivan, Donal M.; Rose, Gemma A.; Howell, Phil J.

2014-01-01

410

An eight-parent multiparent advanced generation inter-cross population for winter-sown wheat: creation, properties, and validation.  

PubMed

MAGIC populations represent one of a new generation of crop genetic mapping resources combining high genetic recombination and diversity. We describe the creation and validation of an eight-parent MAGIC population consisting of 1091 F7 lines of winter-sown wheat (Triticum aestivum L.). Analyses based on genotypes from a 90,000-single nucleotide polymorphism (SNP) array find the population to be well-suited as a platform for fine-mapping quantitative trait loci (QTL) and gene isolation. Patterns of linkage disequilibrium (LD) show the population to be highly recombined; genetic marker diversity among the founders was 74% of that captured in a larger set of 64 wheat varieties, and 54% of SNPs segregating among the 64 lines also segregated among the eight founder lines. In contrast, a commonly used reference bi-parental population had only 54% of the diversity of the 64 varieties with 27% of SNPs segregating. We demonstrate the potential of this MAGIC resource by identifying a highly diagnostic marker for the morphological character "awn presence/absence" and independently validate it in an association-mapping panel. These analyses show this large, diverse, and highly recombined MAGIC population to be a powerful resource for the genetic dissection of target traits in wheat, and it is well-placed to efficiently exploit ongoing advances in phenomics and genomics. Genetic marker and trait data, together with instructions for access to seed, are available at http://www.niab.com/MAGIC/. PMID:25237112

Mackay, Ian J; Bansept-Basler, Pauline; Barber, Toby; Bentley, Alison R; Cockram, James; Gosman, Nick; Greenland, Andy J; Horsnell, Richard; Howells, Rhian; O'Sullivan, Donal M; Rose, Gemma A; Howell, Phil J

2014-09-01

411

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

E-print Network

to watch sports in less time than a game takes to play. Computing a summarization of a game depends upon, interactive television, sports 1. INTRODUCTION Recent advances in internet video technology are the precursorsVideo Summarization Based on User Interaction Dan R. Olsen Jr. Brigham Young University olsen

Olsen Jr., Dan R.

412

Online smoothing of live, variable-bit-rate video  

Microsoft Academic Search

Bandwidth smoothing techniques are effective at reducing the burstiness of a compressed, pre-recorded video stream by prefetching frames into the client playback buffer in advance of each burst. In contrast to stored video, live applications typically have limited knowledge of frame sizes and often require bounds on the delay between the source and the client(s). This paper addresses bandwidth smoothing

J. Rexford; S. Sen; J. Dey; W. Feng; J. Kurose; J. Stankovic; D. Towsley

1997-01-01

413

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

414

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 video structure analysis and graph op- timization. We analyze the structure of the original video, find

King, Kuo Chin Irwin

415

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

416

Video Relay Services  

MedlinePLUS

... users through video equipment, rather than through typed text. Video equipment links the VRS user with a ... CA flows much more quickly than with a text-based TRS call, VRS has become an enormously ...

417

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.

418

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

419

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

420

Video Google: Efficient Visual Search of Videos  

Microsoft Academic Search

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

Josef Sivic; Andrew Zisserman

2006-01-01

421

Feature-preserving image/video compression  

NASA Astrophysics Data System (ADS)

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

Al-Jawad, Naseer; Jassim, Sabah

2005-10-01

422

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

423

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

424

Query by Video Clip  

Microsoft Academic Search

.   Typical digital video search is based on queries involving a single shot. We generalize this problem by allowing queries\\u000a that involve a video clip (say, a 10-s video segment). We propose two schemes: (i) retrieval based on key frames follows the traditional approach of identifying shots, computing key frames from a video, and then extracting image features\\u000a around the

Anil K. Jain; Aditya Vailaya; Wei Xiong

1999-01-01

425

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

426

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.

427

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

428

Video Demonstration: Borescope Inspection  

NSDL National Science Digital Library

This module, produced by the Wind Technician TV project from Highland Community College, provides a video demonstration of the Everest XLG3 video probe used to inspect a wind turbine gearbox. This would be useful for students who are learning the visual inspection process and want to see how this specific technology works. Running time for the video is 2:59.

429

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

430

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

431

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

432

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

433

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

434

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

435

Animated Classic Mosaics from Video  

Microsoft Academic Search

Generating artificial classic mosaics from digital images is an area of NPR rendering that has recently seen several successful\\u000a approaches. A sequence of mosaic images creates a unique and compelling animation style, however, there has been little work\\u000a in this area. We address the problem of creating animated mosaics directly from real video sequences. As with any animation,\\u000a the main

Yu Liu; Olga Veksler

2009-01-01

436

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)

2010-11-12

437

Segmental Hidden Markov Models for View-based Sport Video Analysis Yi Ding and Guoliang Fan  

E-print Network

Segmental Hidden Markov Models for View-based Sport Video Analysis Yi Ding and Guoliang Fan School in the game, e.g., advancing the ball. As a fundamental semantic structure, view-based sport video analysis field (www.okstate.com). There are mainly two methodologies for semantic-based video analysis, i

Fan, Guoliang

438

SMOOTH AND COLLISION-FREE NAVIGATION FOR MULTIPLE MOBILE ROBOTS AND VIDEO GAME CHARACTERS  

E-print Network

SMOOTH AND COLLISION-FREE NAVIGATION FOR MULTIPLE MOBILE ROBOTS AND VIDEO GAME CHARACTERS Jamie R and Collision-Free Navigation for Multiple Mobile Robots and Video Game Characters (Under the direction robotics, many video games, and simulated environments. Moreover, technological advances in mobile robot

North Carolina at Chapel Hill, University of

439

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

440

Violent Video Games as Exemplary Teachers  

Microsoft Academic Search

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

Douglas A. Gentile; J. Ronald Gentile

441

[Video-assisted thoracic surgery--1].  

PubMed

Due to the latest advances in video technology and endoscopic instruments, thoracoscopy has changed from being mainly diagnostic to include many threapeutic procedures in the thorax. The article reviews equipment and techniques as well as attempts to reflect current attitudes to indications for their use. PMID:7652991

Ladegaard, L; Kruse-Andersen, S; Pedersen, J J; Andersen, K B

1995-07-17

442

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

443

Recent advances in quadrotor capabilities  

Microsoft Academic Search

I. SUMMARY OF CONTENTS This video features advanced control capabilities for a quadrotor helicopter. We use an Ascending Technologies Hummingbird quadrotor [1] in conjunction with a Vicon [2] motion capture system in a flight arena [3] . The video shows a single quadrotor flying through windows with only three inches of clearance on any side of the platform and perching

Daniel Mellinger; Nathan Michael; Michael Shomin; Vijay Kumar

2011-01-01

444

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

445

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

446

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.

447

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

448

User-oriented summary extraction for soccer video based on multimodal analysis  

NASA Astrophysics Data System (ADS)

An advanced user-oriented summary extraction method for soccer video is proposed in this work. Firstly, an algorithm of user-oriented summary extraction for soccer video is introduced. A novel approach that integrates multimodal analysis, such as extraction and analysis of the stadium features, moving object features, audio features and text features is introduced. By these features the semantic of the soccer video and the highlight mode are obtained. Then we can find the highlight position and put them together by highlight degrees to obtain the video summary. The experimental results for sports video of world cup soccer games indicate that multimodal analysis is effective for soccer video browsing and retrieval.

Liu, Huayong; Jiang, Shanshan; He, Tingting

2011-11-01

449

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

450

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

451

Dynamic object perception by pigeons: discrimination of action in video presentations  

Microsoft Academic Search

.   Two experiments examined the discrimination by pigeons of relative motion using computer-generated video stimuli. Using a\\u000a go\\/no-go procedure, pigeons were tested with video stimuli in which the camera's perspective went either \\

Robert G. Cook; Robert Shaw; Aaron P. Blaisdell

2001-01-01

452

Advanced natural gas-fired turbine system utilizing thermochemical recuperation and/or partial oxidation for electricity generation, greenfield and repowering applications  

SciTech Connect

The performance, economics and technical feasibility of heavy duty combustion turbine power systems incorporating two advanced power generation schemes have been estimated to assess the potential merits of these advanced technologies. The advanced technologies considered were: Thermochemical Recuperation (TCR), and Partial Oxidation (PO). The performance and economics of these advanced cycles are compared to conventional combustion turbine Simple-Cycles and Combined-Cycles. The objectives of the Westinghouse evaluation were to: (1) simulate TCR and PO power plant cycles, (2) evaluate TCR and PO cycle options and assess their performance potential and cost potential compared to conventional technologies, (3) identify the required modifications to the combustion turbine and the conventional power cycle components to utilize the TCR and PO technologies, (4) assess the technical feasibility of the TCR and PO cycles, (5) identify what development activities are required to bring the TCR and PO technologies to commercial readiness. Both advanced technologies involve the preprocessing of the turbine fuel to generate a low-thermal-value fuel gas, and neither technology requires advances in basic turbine technologies (e.g., combustion, airfoil materials, airfoil cooling). In TCR, the turbine fuel is reformed to a hydrogen-rich fuel gas by catalytic contact with steam, or with flue gas (steam and carbon dioxide), and the turbine exhaust gas provides the indirect energy required to conduct the endothermic reforming reactions. This reforming process improves the recuperative energy recovery of the cycle, and the delivery of the low-thermal-value fuel gas to the combustors potentially reduces the NO{sub x} emission and increases the combustor stability.

NONE

1997-03-01

453

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

454

Enhanced video viewing from metadata  

NASA Astrophysics Data System (ADS)

Current advanced television concepts envision data broadcasting along with the video stream, which is used by interactive applications at the client end. In this case, these applications do not proactively personalize the experience and may not allow user requests for additional information. We propose content enhancement using automatic retrieval of additional information based on video content and user interests. Our paper describes Video Retriever Genie, a system that enhances content with additional information based on metadata that provides semantics for the content. The system is based on a digital TV (Philips TriMedia) platform. We enhance content through user queries that define information extraction tasks that retrieve information from the Web. We present several examples of content enhancement such as additional movie character/actor information, financial information and weather alerts. Our system builds a bridge between the traditional TV viewing and the domain of personal computing and Internet. The boundaries between these domains are dissolving and this system demonstrates one effective approach for content enhancement. In addition, we illustrate our discussion with examples from two existing standards - MPEG-7 and TV-Anytime.

Janevski, Angel; McGee, Thomas; Agnihotri, Lalitha; Dimitrova, Nevenka

2001-11-01

455

Trends in Global Demonstrations of Carbon Management Technologies to Advance Coal- Based Power Generation With Carbon Capture and Storage  

NASA Astrophysics Data System (ADS)

Atmospheric CO2 concentrations increased an estimated 35% since preindustrial levels two centuries ago, reportedly due to the burning of fossil fuels combined with increased deforestation. In the U.S., energy-related activities account for 75% of anthropogenic greenhouse gas (GHG) emissions, with more than 50% from large stationary sources such as power plants and about one-third from transportation. Mitigation technologies for CO2 atmospheric stabilization based on energy and economic scenarios include coal-based power plant- carbon capture and storage (CCS), and the U.S. Department of Energy (DOE) is assessing CCS operations and supporting technologies at U.S. locations and opportunities abroad reported here. The Algerian In Salah Joint Industry Project injecting 1 million tons CO2 (MtCO2)/year into a gas field sandstone, and the Canadian Weyburn-Midale CO2 Monitoring and Storage Project injecting over 1.8 MtCO2/year into carbonate oil reservoirs are ongoing industrial-scale storage operations DOE participates in. DOE also supports mid-scale CCS demonstrations at the Australian Otway Project and CO2SINK in Germany. Enhanced oil recovery operations conducted for decades in west Texas and elsewhere have provided the industrial experience to build on, and early pilots such as Frio-I Texas in 2004 have spearheaded technology deployment. While injecting 1,600 tons of CO2 into a saline sandstone at Frio, time-lapse borehole and surface seismic detected P-wave velocity decreases and reflection amplitude changes resulting from the replacement of brine with CO2 in the reservoir. Just two of many cutting-edge technologies tested at Frio, these and others are now deployed by U.S. researchers with international teams to evaluate reservoir injectivity, capacity, and integrity, as well as to assess CO2 spatial distribution, trapping, and unlikely leakage. Time-lapse Vertical Seismic Profiling at Otway and microseismic at In Salah and Otway, monitor injection and reservoir conditions with geophysics. Borehole-based technologies include a novel geochemical two-phase reservoir sampler deployed at Otway, and thermal-based measurements at CO2SINK for coupled hydrologic-geochemical reservoir analyses. Seismic, geomechanical, hydrologic, geochemical, and core studies are used in a multidisciplinary approach to assess CO2 trapping and reservoir integrity at In Salah. With estimated lifetime storage of 17 MtCO2 at In Salah, this and other CCS demonstrations provide opportunities to gain commercial experience for advancing coal-based power generation-CCS for carbon management.

Cohen, K. K.; Plasynski, S.; Feeley, T. J.

2008-05-01

456

Video summarization by video structure analysis and graph optimization  

Microsoft Academic Search

Video over Internet is pervasive nowadays. Since downloading and browsing through the whole video le is time consuming, video sum- marization techniques, which aim at providing a way for the user to grasp the major content of the video without viewing the whole video, has received more and more attention. In this paper we propose a novel method for moving

Shi Lu; Irwin King; Michael R. Lyu

2004-01-01

457

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- ing current timeline-based video players. Video digests are a new format for informational videos authors create such digests using transcript-based interactions. With our tools, authors can manually

Hartmann, Björn

458

VideoTrails: Representing and Visualizing Structure in Video Sequences  

E-print Network

- ters over time, we lay the groundwork for the complete analysis and representation of the video analysis, indexing, and retrieval of video sequences are important missing components in today's videoVideoTrails: Representing and Visualizing Structure in Video Sequences Vikrant Kobla, David

Faloutsos, Christos

459

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 presentations highlighting health sciences research and education events IME Innovations in Medical Education Communications #12;What is the IME Video Library? The Innovations in Medical Education (IME) Video Library

Wisconsin at Madison, University of

460

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

461

A Learning Design for Student-Generated Digital Storytelling  

ERIC Educational Resources Information Center

The literature on digital video in education emphasises the use of pre-fabricated, instructional-style video assets. Learning designs for supporting the use of these expert-generated video products have been developed. However, there has been a paucity of pedagogical frameworks for facilitating specific genres of learner-generated video projects.…

Kearney, Matthew

2011-01-01

462

View synthesis techniques for 3D video  

NASA Astrophysics Data System (ADS)

To facilitate new video applications such as three-dimensional video (3DV) and free-viewpoint video (FVV), multiple view plus depth format (MVD), which consists of both video views and the corresponding per-pixel depth images, is being investigated. Virtual views can be generated using depth image based rendering (DIBR), which takes video and the corresponding depth images as input. This paper discusses view synthesis techniques based on DIBR, which includes forward warping, blending and hole filling. Especially, we will emphasize on the techniques brought to the MPEG view synthesis reference software (VSRS). Unlike the case in the field of computer graphics, the ground truth depth images for nature content are very difficult to obtain. The estimated depth images used for view synthesis typically contain different types of noises. Some robust synthesis modes to combat against the depth errors are also presented in this paper. In addition, we briefly discuss how to use synthesis techniques with minor modifications to generate the occlusion layer information for layered depth video (LDV) data, which is another potential format for 3DV applications.

Tian, Dong; Lai, Po-Lin; Lopez, Patrick; Gomila, Cristina

2009-08-01

463

SIFT-Bag kernel for video event analysis  

Microsoft Academic Search

In this work, we present a SIFT-Bag based generative-to- discriminative framework for addressing the problem of video event recognition in unconstrained news videos. In the gen- erative stage, each video clip is encoded as a bag of SIFT feature vectors, the distribution of which is described by a Gaussian Mixture Models (GMM). In the discriminative stage, the SIFT-Bag Kernel is

Xi Zhou; Xiaodan Zhuang; Shuicheng Yan; Shih-fu Chang; Mark Hasegawa-johnson; Thomas S. Huang

2008-01-01

464

A System for On-demand Video Lectures  

Microsoft Academic Search

Abstract We propose a lecture-on-demand system, which searches lec- ture videos for segments,relevant to user information needs. We utilize the benefits of textbooks and audio\\/video data cor- responding to a single lecture. Our system extracts the au- dio track from a target lecture video, generates a transcrip- tion by large vocabulary continuous speech recognition, and produces,a textual index. Users can

Atsushi Fujii; Yyy Katunobu Itou; Yyy Tetsuya Ishikawa

465

Development of a video-rate stereo machine  

Microsoft Academic Search

A video-rate stereo machine has been developed at CMU with the capability of generating a dense range map, aligned with an intensity image, at the video rate. The target performance of the CMU video-rate stereo machine is: 1) multi-image input of 6 cameras; 2) high throughput of 30 million point×disparity measurement per second; 3) high frame rate of 30 frame\\/sec;

Takeo Kanade; Hiroshi Kano; Shigeru Kimura; Atsushi Yoshida; Kazuo Oda

1995-01-01

466

A fast feature-based video mosaic  

NASA Astrophysics Data System (ADS)

This paper presents a fast method to construct an entire panorama from video sequence. Firstly, SURF, which has good performance in computation time and accuracy, is used to detect features for frames from video streams. Secondly, a novel matching scheme based on hash mapping and the ratio between the Euclidean distance to the nearest and the second nearest neighbors is proposed to match SURF features. As there may be some error matchings generated above, especially in the presence of objects moving, a RANSAC technique is applied to eliminate outliers. Besides, in order to avoid mosaicing all video frames which typically contains significant redundancy, we adaptively identify key frames based on the number of tracked feature points. Finally, the wide field of video image is got by stitching the key frames mapped to a reference coordinate system. Experimental results demonstrate the fast-speed and superior quality of this proposed method.

Lin, Wu; Hong, Jingxin; Zhang, Hao; Li, Lin

2009-10-01