Sample records for computer technology holography

  1. Haptic holography : an early computational plastic

    E-print Network

    Plesniak, Wendy J. (Wendy Jean)

    2001-01-01

    This dissertation introduces haptic holography, a combination of computational modeling and multimodal spatial display, as an early computationalplastic In this work, we combine various holographic displays with a force ...

  2. Advanced technology development multi-color holography

    NASA Technical Reports Server (NTRS)

    Vikram, Chandra S.

    1994-01-01

    Several key aspects of multi-color holography and some non-conventional ways to study the holographic reconstructions are considered. The error analysis of three-color holography is considered in detail with particular example of a typical triglycine sulfate crystal growth situation. For the numerical analysis of the fringe patterns, a new algorithm is introduced with experimental verification using sugar-water solution. The role of the phase difference among component holograms is also critically considered with examples of several two- and three-color situations. The status of experimentation on two-color holography and fabrication of a small breadboard system is also reported. Finally, some successful demonstrations of unconventional ways to study holographic reconstructions are described. These methods are deflectometry and confocal optical processing using some Spacelab III holograms.

  3. Advanced technology development multi-color holography

    NASA Technical Reports Server (NTRS)

    Vikram, Chandra S.

    1993-01-01

    This is the final report of the Multi-color Holography project. The comprehensive study considers some strategic aspects of multi-color holography. First, various methods of available techniques for accurate fringe counting are reviewed. These are heterodyne interferometry, quasi-heterodyne interferometry, and phase-shifting interferometry. Phase-shifting interferometry was found to be the most suitable for multi-color holography. Details of experimentation with a sugar solution are also reported where better than 1/200 of a fringe order measurement capability was established. Rotating plate glass phase shifter was used for the experimentation. The report then describes the possible role of using more than two wavelengths with special reference-to-object beam intensity ratio needs in multicolor holography. Some specific two- and three-color cases are also described in detail. Then some new analysis methods of the reconstructed wavefront are considered. These are deflectometry, speckle metrology, confocal optical signal processing, and phase shifting technique related applications. Finally, design aspects of an experimental breadboard are presented.

  4. Pit Distribution Design for Computer-Generated Waveguide Holography

    NASA Astrophysics Data System (ADS)

    Yagi, Shogo; Imai, Tadayuki; Ueno, Masahiro; Ohtani, Yoshimitsu; Endo, Masahiro; Kurokawa, Yoshiaki; Yoshikawa, Hiroshi; Watanabe, Toshifumi; Fukuda, Makoto

    2008-02-01

    Multilayered waveguide holography (MWH) is one of a number of page-oriented data multiplexing holographies that will be applied to optical data storage and three-dimensional (3D) moving images. While conventional volumetric holography using photopolymer or photorefractive materials requires page-by-page light exposure for recording, MWH media can be made by employing stamping and laminating technologies that are suitable for mass production. This makes devising an economical mastering technique for replicating holograms a key issue. In this paper, we discuss an approach to pit distribution design that enables us to replace expensive electron beam mastering with economical laser beam mastering. We propose an algorithm that avoids the overlapping of even comparatively large adjacent pits when we employ laser beam mastering. We also compensate for the angular dependence of the diffraction power, which strongly depends on pit shape, by introducing an enhancement profile so that a diffracted image has uniform intensity.

  5. Computer Technology

    NSDL National Science Digital Library

    Mrs. Thackeray

    2007-10-14

    Students will learn the history of computers as well as how computers work. COMPUTER TECHNOLOGY (9-12) - 52.0417 Computer Technology is an introduction to computer application software that includes word processing, spreadsheet, database, and telecommunications. An awareness of career opportunities, business ethics, and trends is included. Everything is done with computers. Your job will most likely have a computer to save files, write ...

  6. The application of digital image plane holography technology to identify Chinese herbal medicine

    NASA Astrophysics Data System (ADS)

    Wang, Huaying; Guo, Zhongjia; Liao, Wei; Zhang, Zhihui

    2012-03-01

    In this paper, the imaging technology of digital image plane holography to identify the Chinese herbal medicine is studied. The optical experiment system of digital image plane holography which is the special case of pre-magnification digital holography was built. In the record system, one is an object light by using plane waves which illuminates the object, and the other one is recording hologram by using spherical light wave as reference light. There is a Micro objective lens behind the object. The second phase factor which caus ed by the Micro objective lens can be eliminated by choosing the proper position of the reference point source when digital image plane holography is recorded by spherical light. In this experiment, we use the Lygodium cells and Onion cells as the object. The experiment results with Lygodium cells and Onion cells show that digital image plane holography avoid the process of finding recording distance by using auto-focusing approach, and the phase information of the object can be reconstructed more accurately. The digital image plane holography is applied to the microscopic imaging of cells more effectively, and it is suit to apply for the identify of Chinese Herbal Medicine. And it promotes the application of digital holographic in practice.

  7. The application of digital image plane holography technology to identify Chinese herbal medicine

    NASA Astrophysics Data System (ADS)

    Wang, Huaying; Guo, Zhongjia; Liao, Wei; Zhang, Zhihui

    2011-11-01

    In this paper, the imaging technology of digital image plane holography to identify the Chinese herbal medicine is studied. The optical experiment system of digital image plane holography which is the special case of pre-magnification digital holography was built. In the record system, one is an object light by using plane waves which illuminates the object, and the other one is recording hologram by using spherical light wave as reference light. There is a Micro objective lens behind the object. The second phase factor which caus ed by the Micro objective lens can be eliminated by choosing the proper position of the reference point source when digital image plane holography is recorded by spherical light. In this experiment, we use the Lygodium cells and Onion cells as the object. The experiment results with Lygodium cells and Onion cells show that digital image plane holography avoid the process of finding recording distance by using auto-focusing approach, and the phase information of the object can be reconstructed more accurately. The digital image plane holography is applied to the microscopic imaging of cells more effectively, and it is suit to apply for the identify of Chinese Herbal Medicine. And it promotes the application of digital holographic in practice.

  8. Holography: A survey

    NASA Technical Reports Server (NTRS)

    Dudley, D. D.

    1973-01-01

    The development of holography and the state of the art in recording and displaying information, microscopy, motion, pictures, and television applications are discussed. In addition to optical holography, information is presented on microwave, acoustic, ultrasonic, and seismic holography. Other subjects include data processing, data storage, pattern recognition, and computer-generated holography. Diagrams of holographic installations are provided. Photographs of typical holographic applications are used to support the theoretical aspects.

  9. A high-reflective surface measurement method based on conoscopic holography technology

    NASA Astrophysics Data System (ADS)

    Cheng, Xu; Li, ZhongWei; Shi, YuSheng; Zhao, HengShuang; Zhan, Guomin

    2014-11-01

    Measuring high-reflective surfaces using optical method is always a big challenging problem. This paper presents a high-reflective surface measurement method based on conoscopic holography technology using a 4D motion platform equipped with a conoscopic holography optical probe. There are two key problems needed to solve before the automate scan of the complex shape surface: the coordinate calibration and the path planning. To improve the calibration efficiency and accuracy, the coordinate calibration is divided into two parts: the rough calibration and the accurate registration. The path planning consists of two aspects including: the path points generation and the path points verification. In addition, by scanning the objects having high-reflective surfaces, such as the metal blades, coins and other work-pieces, the efficiency of the measurement method has been verified.

  10. Digital holography: 30 years later

    Microsoft Academic Search

    Leonid P. Yaroslavsky

    2002-01-01

    Digital holography is analysis, synthesis and simulation of wave fields by means of digital computers and processors. Since first publications in digital holography, more than 30 years have passed. From then on, the ideas of digital holography formulated at that time has found quite a number of applications and implementations; but not all of them. Some old dreams such as

  11. Image communication scheme based on dynamic visual cryptography and computer generated holography

    NASA Astrophysics Data System (ADS)

    Palevicius, Paulius; Ragulskis, Minvydas

    2015-01-01

    Computer generated holograms are often exploited to implement optical encryption schemes. This paper proposes the integration of dynamic visual cryptography (an optical technique based on the interplay of visual cryptography and time-averaging geometric moiré) with Gerchberg-Saxton algorithm. A stochastic moiré grating is used to embed the secret into a single cover image. The secret can be visually decoded by a naked eye if only the amplitude of harmonic oscillations corresponds to an accurately preselected value. The proposed visual image encryption scheme is based on computer generated holography, optical time-averaging moiré and principles of dynamic visual cryptography. Dynamic visual cryptography is used both for the initial encryption of the secret image and for the final decryption. Phase data of the encrypted image are computed by using Gerchberg-Saxton algorithm. The optical image is decrypted using the computationally reconstructed field of amplitudes.

  12. Computer generated holography using a graphics processing unit

    NASA Astrophysics Data System (ADS)

    Masuda, Nobuyuki; Ito, Tomoyoshi; Tanaka, Takashi; Shiraki, Atsushi; Sugie, Takashige

    2006-01-01

    We have applied the graphics processing unit (GPU) to computer generated holograms (CGH) to overcome the high computational cost of CGH and have compared the speed of a GPU implementation to a standard CPU implementation. The calculation speed of a GPU (GeForce 6600, nVIDIA) was found to be about 47 times faster than that of a personal computer with a Pentium 4 processor. Our system can realize real-time reconstruction of a 64-point 3-D object at video rate using a liquid-crystal display of resolution 800×600.

  13. Computer generated holography using a graphics processing unit.

    PubMed

    Masuda, Nobuyuki; Ito, Tomoyoshi; Tanaka, Takashi; Shiraki, Atsushi; Sugie, Takashige

    2006-01-23

    We have applied the graphics processing unit (GPU) to computer generated holograms (CGH) to overcome the high computational cost of CGH and have compared the speed of a GPU implementation to a standard CPU implementation. The calculation speed of a GPU (GeForce 6600, nVIDIA) was found to be about 47 times faster than that of a personal computer with a Pentium 4 processor. Our system can realize real-time reconstruction of a 64-point 3-D object at video rate using a liquid-crystal display of resolution 800x600. PMID:19503377

  14. technologies for computer

    E-print Network

    Chaudhuri, Surajit

    information about how Microsoft Research tools and technologies can enhance your computer science research involved in innovative research in these areas? Microsoft Research Connections provides access to toolsTools and technologies for computer scientists who dream the future More information For more

  15. Digital Technology Group Computer Laboratory

    E-print Network

    Cambridge, University of

    Digital Technology Group 1/20 Computer Laboratory Digital Technology Group Computer Laboratory William R Carson Building on the presentation by Francisco Monteiro Matlab #12;Digital Technology Group 2/20 Computer Laboratory Digital Technology Group Computer Laboratory The product: MATLAB® - The Language

  16. Holography in string theory

    NASA Astrophysics Data System (ADS)

    Deboer, Philip Albert

    This thesis presents three aspects of holography, or holographic duality, in string theory. The goal of holography is to describe gravitational theories by field theories in fewer dimensions. Although recently there have been significant strides toward understanding generic holographic dualities between particle theory and gravity, it is not clear how string theory might implement this. In Chapter 2 the role of compact directions in holography is explored. We discover that a generalization of Bousso's prescription is necessary. In this chapter we also discover that holography provides no clear solution to understanding closed timelike curves, unlike earlier speculation. Using holography as a tool, we are able in Chapter 3 to compute the thermal two-point function of the graviton in the dual to a Little String Theory. This is a strongly coupled non-gravitational theory. It exists as a limit of a certain weakly coupled string theory. We find a typical thermal spectrum with no obvious interpretation in terms of particles and bound states. We find evidence supporting a conjecture that this theory is thermodynamically unstable. Finally, in Chapter 4, we investigate the inhomogeneous decay of an unstable D-brane. We study the average number and energy of closed strings emitted during the decay, and confirm that the space-filling D-brane decays completely into lower-dimensional D-branes. One of the long-term goals of this research is to understand how closed-string fluctuations appear in the open-string sector of string theory. This is directly related to the appearance of holography in string theory since gravity appears in the closed-string sector, while the end-points of open strings can be described by field theory.

  17. Visualization of x-ray computer tomography using computer-generated holography

    Microsoft Academic Search

    Masahiro Daibo; Norio Tayama

    1998-01-01

    The theory converted from x-ray projection data to the hologram directly by combining the computer tomography (CT) with the computer generated hologram (CGH), is proposed. The purpose of this study is to offer the theory for realizing the all- electronic and high-speed seeing through 3D visualization system, which is for the application to medical diagnosis and non- destructive testing. First,

  18. Computer Technology in Adult Education.

    ERIC Educational Resources Information Center

    Slider, Patty; Hodges, Kathy; Carter, Cea; White, Barbara

    This publication provides materials to help adult educators use computer technology in their teaching. Section 1, Computer Basics, contains activities and materials on these topics: increasing computer literacy, computer glossary, parts of a computer, keyboard, disk care, highlighting text, scrolling and wrap-around text, setting up text,…

  19. Visualization of x-ray computer tomography using computer-generated holography

    NASA Astrophysics Data System (ADS)

    Daibo, Masahiro; Tayama, Norio

    1998-09-01

    The theory converted from x-ray projection data to the hologram directly by combining the computer tomography (CT) with the computer generated hologram (CGH), is proposed. The purpose of this study is to offer the theory for realizing the all- electronic and high-speed seeing through 3D visualization system, which is for the application to medical diagnosis and non- destructive testing. First, the CT is expressed using the pseudo- inverse matrix which is obtained by the singular value decomposition. CGH is expressed in the matrix style. Next, `projection to hologram conversion' (PTHC) matrix is calculated by the multiplication of phase matrix of CGH with pseudo-inverse matrix of the CT. Finally, the projection vector is converted to the hologram vector directly, by multiplication of the PTHC matrix with the projection vector. Incorporating holographic analog computation into CT reconstruction, it becomes possible that the calculation amount is drastically reduced. We demonstrate the CT cross section which is reconstituted by He-Ne laser in the 3D space from the real x-ray projection data acquired by x-ray television equipment, using our direct conversion technique.

  20. [Earth Science Technology Office's Computational Technologies Project

    NASA Technical Reports Server (NTRS)

    Fischer, James (Technical Monitor); Merkey, Phillip

    2005-01-01

    This grant supported the effort to characterize the problem domain of the Earth Science Technology Office's Computational Technologies Project, to engage the Beowulf Cluster Computing Community as well as the High Performance Computing Research Community so that we can predict the applicability of said technologies to the scientific community represented by the CT project and formulate long term strategies to provide the computational resources necessary to attain the anticipated scientific objectives of the CT project. Specifically, the goal of the evaluation effort is to use the information gathered over the course of the Round-3 investigations to quantify the trends in scientific expectations, the algorithmic requirements and capabilities of high-performance computers to satisfy this anticipated need.

  1. Thermodynamic holography

    E-print Network

    Bo-Bo Wei; Zhan-Feng Jiang; Ren-Bao Liu

    2014-11-24

    The holographic principle states that the information about a volume of a system is encoded on the boundary surface of the volume. Holography appears in many branches of physics, such as optics, electromagnetism, many-body physics, quantum gravity, and string theory. Here we show that holography is also an underlying principle in thermodynamics, a most important foundation of physics. The thermodynamics of a system is fully determined by its partition function. We prove that the partition function of a physical system is an analytic function of all the physical parameters, and therefore its values in any area on the complex plane of a physical parameter are uniquely determined by its values along the boundary. The thermodynamic holography has applications in studying thermodynamics of nano-scale systems (such as molecule engines, nano-generators and macromolecules) and provides a new approach to many-body physics.

  2. Computer Viruses. Technology Update.

    ERIC Educational Resources Information Center

    Ponder, Tim, Comp.; Ropog, Marty, Comp.; Keating, Joseph, Comp.

    This document provides general information on computer viruses, how to help protect a computer network from them, measures to take if a computer becomes infected. Highlights include the origins of computer viruses; virus contraction; a description of some common virus types (File Virus, Boot Sector/Partition Table Viruses, Trojan Horses, and…

  3. COMPUTERS: EDUCATIONAL TECHNOLOGY PARADOX?

    Microsoft Academic Search

    Wan Narita Mustapha

    As we move further into the new millennium, the need to involve and adapt learners with new technology have been the main aim of many institutions of higher learning in Malaysia. The involvement of the government in huge technology-based projects like the Multimedia Super Corridor Highway (MSC) and one of its flagships, the Smart Schools have invoked responses to many

  4. Computer Technology for Industry.

    ERIC Educational Resources Information Center

    Aviation/Space, 1982

    1982-01-01

    A special National Aeronautics and Space Administration (NASA) service is contributing to national productivity by providing industry with reusable, low-cost, government-developed computer programs. Located at the University of Georgia, NASA's Computer Software Management and Information Center (COSMIC) has developed programs for equipment…

  5. Decoding Technology: Computer Shortcuts

    ERIC Educational Resources Information Center

    Walker, Tim; Donohue, Chip

    2008-01-01

    For the typical early childhood administrator, there will never be enough hours in a day to finish the work that needs to be done. This includes numerous hours spent on a computer tracking enrollment, managing the budget, researching curriculum ideas online, and many other administrative tasks. Improving an administrator's computer efficiency can…

  6. Information Technology: Computer Systems Engineer

    NSDL National Science Digital Library

    WGBH Educational Foundation

    2012-05-18

    Watch how a community college education took one person from being a computer know-nothing to having a career as a successful information technologist, in this video adapted from Pathways to Technology.

  7. Computer Technology and Social Issues.

    ERIC Educational Resources Information Center

    Garson, G. David

    Computing involves social issues and political choices. Issues such as privacy, computer crime, gender inequity, disemployment, and electronic democracy versus "Big Brother" are addressed in the context of efforts to develop a national public policy for information technology. A broad range of research and case studies are examined in an attempt…

  8. Information Technology: Computer Systems Engineer

    NSDL National Science Digital Library

    In this video adapted from Pathways to Technology, learn what drove Choice Jenningsâ??someone who had never owned a computer of his ownâ??to become interested in computer graphics, attend community college, earn an associate's degree in computer systems engineering (CSE), and start his own information technology (IT) business. Also see the many roles a CSE professional can play, from systems administrator to IT director.The video runs 2:45 and is accompanied by a background essay, standards alignment, and discussion questions. Users who sign up for a free account can save the resource and download the video as well.

  9. Computer Technology for Industry

    NASA Technical Reports Server (NTRS)

    1982-01-01

    Shell Oil Company used a COSMIC program, called VISCEL to insure the accuracy of the company's new computer code for analyzing polymers, and chemical compounds. Shell reported that there were no other programs available that could provide the necessary calculations. Shell produces chemicals for plastic products used in the manufacture of automobiles, housewares, appliances, film, textiles, electronic equipment and furniture.

  10. Trusted Computing Technologies, Intel Trusted Execution Technology.

    SciTech Connect

    Guise, Max Joseph; Wendt, Jeremy Daniel

    2011-01-01

    We describe the current state-of-the-art in Trusted Computing Technologies - focusing mainly on Intel's Trusted Execution Technology (TXT). This document is based on existing documentation and tests of two existing TXT-based systems: Intel's Trusted Boot and Invisible Things Lab's Qubes OS. We describe what features are lacking in current implementations, describe what a mature system could provide, and present a list of developments to watch. Critical systems perform operation-critical computations on high importance data. In such systems, the inputs, computation steps, and outputs may be highly sensitive. Sensitive components must be protected from both unauthorized release, and unauthorized alteration: Unauthorized users should not access the sensitive input and sensitive output data, nor be able to alter them; the computation contains intermediate data with the same requirements, and executes algorithms that the unauthorized should not be able to know or alter. Due to various system requirements, such critical systems are frequently built from commercial hardware, employ commercial software, and require network access. These hardware, software, and network system components increase the risk that sensitive input data, computation, and output data may be compromised.

  11. Helsinki University of Technology: Computational Information Technology

    NSDL National Science Digital Library

    Computational Information Technology is a research group of the Laboratory of Computational Engineering at the Helsinki University of Technology in Finland. This section of the website introduces visitors to the group's work on modelling and analyzing complex physical, technical and economic processes and systems. Researchers "carry out method development and application oriented research on advanced probabilistic and information theoretic methods." Some applications include statistical modelling of financial markets, pattern recognition in neural networks, machine vision for microscope image processing, data mining, and intelligent human-machine interfaces. The Research Projects section describes the group's work in these areas and highlights the mathematical and statistical methods used, such as Bayesian methods, vision geometry, Turing's reaction-diffusion systems, and time-frequency analysis. Each research area has its own website, where the overall project and theoretical framework is described along with images and diagrams. Publications, such as theses and journal articles are listed and some conference proceedings and articles are available to download.

  12. Digital holography and quantitative phase contrast imaging using computational shear interferometry

    NASA Astrophysics Data System (ADS)

    Falldorf, Claas; Agour, Mostafa; Bergmann, Ralf B.

    2015-02-01

    In this publication, we give a brief introduction into the field of computational shear interferometry, which allows for determining arbitrary wave fields from a set of shear interferograms. We discuss limitations of the method with respect to the coherence of the underlying wave field and present various numerical methods to recover it from its sheared representations. Finally, we show experimental results on digital holography of objects with rough surfaces using a fiber coupled light-emitting diode and quantitative phase contrast imaging as well as numerical refocusing in differential interference contrast microscopy.

  13. Digital holography: 30 years later

    NASA Astrophysics Data System (ADS)

    Yaroslavsky, Leonid P.

    2002-06-01

    Digital holography is analysis, synthesis and simulation of wave fields by means of digital computers and processors. Since first publications in digital holography, more than 30 years have passed. From then on, the ideas of digital holography formulated at that time has found quite a number of applications and implementations; but not all of them. Some old dreams such as that of holographic television, display and virtual reality still have not come true and some results and methods were left on the roadside. In the paper, a brief review of digital holography is presented and some 'roadside' subjects such as discrete representation of optical transforms and Monte Carlo methods for synthesis of computer generated display holograms and studying speckle noise in coherent imaging systems are revisited. In particular, it is shown (i) how, by an appropriate selection of a 'virtual' pseudo-random diffuser, one can generate Fourier holograms of 3D objects that can reconstruct their images from different observation directions and (ii) how such distortions in measuring diffusely scattered wave fields for computer reconstruction as limitation of the hologram size, limitation of its dynamic range and quantization affect speckle contrast in reconstructed images.

  14. Captology: Computers as Persuasive Technologies

    NSDL National Science Digital Library

    "The Stanford Persuasive Technology Lab creates insight into how computing products -- from websites to mobile phone software -- can be designed to change what people believe and what they do." This unusual field of study is called captology, and the subject is explored in detail on the lab's homepage. The Key Concepts section provides a brief overview of captology and links to another page with nine topic papers published by researchers at the lab. In a series of examples demonstrating how computers can be used to influence a person, the site's creators separate instances into macrosuasion and microsuasion. Specific websites and computer programs are highlighted to reveal these interesting marketing or motivational tactics.

  15. Children and Computers: New Technology--

    E-print Network

    Cassell, Justine

    media tech- nology brought with it great promise for social and educational benefits, and great concern- nology benefits children by opening up new worlds to them, while opponents argue that new media might Computer technology has ushered in a new era of mass media, bringing with it great promise and great

  16. Content metamorphosis in synthetic holography

    NASA Astrophysics Data System (ADS)

    Desbiens, Jacques

    2013-02-01

    A synthetic hologram is an optical system made of hundreds of images amalgamated in a structure of holographic cells. Each of these images represents a point of view on a three-dimensional space which makes us consider synthetic holography as a multiple points of view perspective system. In the composition of a computer graphics scene for a synthetic hologram, the field of view of the holographic image can be divided into several viewing zones. We can attribute these divisions to any object or image feature independently and operate different transformations on image content. In computer generated holography, we tend to consider content variations as a continuous animation much like a short movie. However, by composing sequential variations of image features in relation with spatial divisions, we can build new narrative forms distinct from linear cinematographic narration. When observers move freely and change their viewing positions, they travel from one field of view division to another. In synthetic holography, metamorphoses of image content are within the observer's path. In all imaging Medias, the transformation of image features in synchronisation with the observer's position is a rare occurrence. However, this is a predominant characteristic of synthetic holography. This paper describes some of my experimental works in the development of metamorphic holographic images.

  17. Optical Computers and Space Technology

    NASA Technical Reports Server (NTRS)

    Abdeldayem, Hossin A.; Frazier, Donald O.; Penn, Benjamin; Paley, Mark S.; Witherow, William K.; Banks, Curtis; Hicks, Rosilen; Shields, Angela

    1995-01-01

    The rapidly increasing demand for greater speed and efficiency on the information superhighway requires significant improvements over conventional electronic logic circuits. Optical interconnections and optical integrated circuits are strong candidates to provide the way out of the extreme limitations imposed on the growth of speed and complexity of nowadays computations by the conventional electronic logic circuits. The new optical technology has increased the demand for high quality optical materials. NASA's recent involvement in processing optical materials in space has demonstrated that a new and unique class of high quality optical materials are processible in a microgravity environment. Microgravity processing can induce improved orders in these materials and could have a significant impact on the development of optical computers. We will discuss NASA's role in processing these materials and report on some of the associated nonlinear optical properties which are quite useful for optical computers technology.

  18. Computer Education in Dental Laboratory Technology Programs.

    ERIC Educational Resources Information Center

    Rogers, William A.; Hawkins, Robert Ross

    1991-01-01

    A 1990 survey of 37 dental technology programs investigated 3 areas of computer use: current and anticipated general computer education courses; incorporation of computer applications into technology and management courses; and faculty use of the computer. Most programs are beginning to expand use of technology. (MSE)

  19. Center for Advanced Computational Technology

    NASA Technical Reports Server (NTRS)

    Noor, Ahmed K.

    2000-01-01

    The Center for Advanced Computational Technology (ACT) was established to serve as a focal point for diverse research activities pertaining to application of advanced computational technology to future aerospace systems. These activities include the use of numerical simulations, artificial intelligence methods, multimedia and synthetic environments, and computational intelligence, in the modeling, analysis, sensitivity studies, optimization, design and operation of future aerospace systems. The Center is located at NASA Langley and is an integral part of the School of Engineering and Applied Science of the University of Virginia. The Center has four specific objectives: 1) conduct innovative research on applications of advanced computational technology to aerospace systems; 2) act as pathfinder by demonstrating to the research community what can be done (high-potential, high-risk research); 3) help in identifying future directions of research in support of the aeronautical and space missions of the twenty-first century; and 4) help in the rapid transfer of research results to industry and in broadening awareness among researchers and engineers of the state-of-the-art in applications of advanced computational technology to the analysis, design prototyping and operations of aerospace and other high-performance engineering systems. In addition to research, Center activities include helping in the planning and coordination of the activities of a multi-center team of NASA and JPL researchers who are developing an intelligent synthesis environment for future aerospace systems; organizing workshops and national symposia; as well as writing state-of-the-art monographs and NASA special publications on timely topics.

  20. Virtual integral holography

    NASA Astrophysics Data System (ADS)

    Venolia, Dan S.; Williams, Lance

    1990-08-01

    A range of stereoscopic display technologies exist which are no more intrusive, to the user, than a pair of spectacles. Combining such a display system with sensors for the position and orientation of the user's point-of-view results in a greatly enhanced depiction of three-dimensional data. As the point of view changes, the stereo display channels are updated in real time. The face of a monitor or display screen becomes a window on a three-dimensional scene. Motion parallax naturally conveys the placement and relative depth of objects in the field of view. Most of the advantages of "head-mounted display" technology are achieved with a less cumbersome system. To derive the full benefits of stereo combined with motion parallax, both stereo channels must be updated in real time. This may limit the size and complexity of data bases which can be viewed on processors of modest resources, and restrict the use of additional three-dimensional cues, such as texture mapping, depth cueing, and hidden surface elimination. Effective use of "full 3D" may still be undertaken in a non-interactive mode. Integral composite holograms have often been advanced as a powerful 3D visualization tool. Such a hologram is typically produced from a film recording of an object on a turntable, or a computer animation of an object rotating about one axis. The individual frames of film are multiplexed, in a composite hologram, in such a way as to be indexed by viewing angle. The composite may be produced as a cylinder transparency, which provides a stereo view of the object as if enclosed within the cylinder, which can be viewed from any angle. No vertical parallax is usually provided (this would require increasing the dimensionality of the multiplexing scheme), but the three dimensional image is highly resolved and easy to view and interpret. Even a modest processor can duplicate the effect of such a precomputed display, provided sufficient memory and bus bandwidth. This paper describes the components of a stereo display system with user point-of-view tracking for interactive 3D, and a digital realization of integral composite display which we term virtual integral holography. The primary drawbacks of holographic display - film processing turnaround time, and the difficulties of displaying scenes in full color -are obviated, and motion parallax cues provide easy 3D interpretation even for users who cannot see in stereo.

  1. Infinite possibilities: Computational structures technology

    NASA Astrophysics Data System (ADS)

    Beam, Sherilee F.

    1994-12-01

    Computational Fluid Dynamics (or CFD) methods are very familiar to the research community. Even the general public has had some exposure to CFD images, primarily through the news media. However, very little attention has been paid to CST--Computational Structures Technology. Yet, no important design can be completed without it. During the first half of this century, researchers only dreamed of designing and building structures on a computer. Today their dreams have become practical realities as computational methods are used in all phases of design, fabrication and testing of engineering systems. Increasingly complex structures can now be built in even shorter periods of time. Over the past four decades, computer technology has been developing, and early finite element methods have grown from small in-house programs to numerous commercial software programs. When coupled with advanced computing systems, they help engineers make dramatic leaps in designing and testing concepts. The goals of CST include: predicting how a structure will behave under actual operating conditions; designing and complementing other experiments conducted on a structure; investigating microstructural damage or chaotic, unpredictable behavior; helping material developers in improving material systems; and being a useful tool in design systems optimization and sensitivity techniques. Applying CST to a structure problem requires five steps: (1) observe the specific problem; (2) develop a computational model for numerical simulation; (3) develop and assemble software and hardware for running the codes; (4) post-process and interpret the results; and (5) use the model to analyze and design the actual structure. Researchers in both industry and academia continue to make significant contributions to advance this technology with improvements in software, collaborative computing environments and supercomputing systems. As these environments and systems evolve, computational structures technology will evolve. By using CST in the design and operation of future structures systems, engineers will have a better understanding of how a system responds and lasts, more cost-effective methods of designing and testing models, and improved productivity. For informational and educational purposes, a videotape is being produced using both static and dynamic images from research institutions, software and hardware companies, private individuals, and historical photographs and drawings. The extensive number of CST resources indicates its widespread use. Applications run the gamut from simpler university-simulated problems to those requiring solutions on supercomputers. In some cases, an image or an animation will be mapped onto the actual structure to show the relevance of the computer model to the structure. computer image using traditional composition theories or video production requirements, often the image loses some of its original digital quality and impact when transferred to videotape. Although many CST images are currently available, those that are edited into the final project must meet two important criteria: they must complement the narration, and they must be broadcast quality when recorded on videotape.

  2. Electro-holography display using computer generated hologram of 3D objects based on projection spectra

    NASA Astrophysics Data System (ADS)

    Huang, Sujuan; Wang, Duocheng; He, Chao

    2012-11-01

    A new method of synthesizing computer-generated hologram of three-dimensional (3D) objects is proposed from their projection images. A series of projection images of 3D objects are recorded with one-dimensional azimuth scanning. According to the principles of paraboloid of revolution in 3D Fourier space and 3D central slice theorem, spectra information of 3D objects can be gathered from their projection images. Considering quantization error of horizontal and vertical directions, the spectrum information from each projection image is efficiently extracted in double circle and four circles shape, to enhance the utilization of projection spectra. Then spectra information of 3D objects from all projection images is encoded into computer-generated hologram based on Fourier transform using conjugate-symmetric extension. The hologram includes 3D information of objects. Experimental results for numerical reconstruction of the CGH at different distance validate the proposed methods and show its good performance. Electro-holographic reconstruction can be realized by using an electronic addressing reflective liquid-crystal display (LCD) spatial light modulator. The CGH from the computer is loaded onto the LCD. By illuminating a reference light from a laser source to the LCD, the amplitude and phase information included in the CGH will be reconstructed due to the diffraction of the light modulated by the LCD.

  3. Radiologic Applications Of Holography

    NASA Astrophysics Data System (ADS)

    Lacey, D. C. Lee

    1987-06-01

    The technique of Image Plane Integral (IPI) Holography has been demonstrated as a useful method for providing autostereoscopic three-dimensional viewing for conventional cineangiography. IPI holograms have a bright, high resolution image that presents proper spatial perception and faster comprehension of orientation, shape and distribution of vascular anatomy. The actual holographic conversion can be made routinely, economically and quickly by photographic technicians with a moderate amount of retraining. The format of the hologram is a Mylar film that is easily seen on a modified light viewbox. Holographic techniques previously attempted with angiography and planar imaging modalities have shown many limitations including low S/N ratios, narrow viewing angles, narrow depth-of-field, distorted spatial relations and various optical aberrations. IPI holography offered at a single imaging center could provide a convenient source of three-dimensional hard copy that would enhance various specific modalities such as conventional cineangiography, DSA, X-ray CT, magnetic resonance imaging (NR) and single photon emission computed tomography (SPECT).

  4. Computer technologies and institutional memory

    NASA Technical Reports Server (NTRS)

    Bell, Christopher; Lachman, Roy

    1989-01-01

    NASA programs for manned space flight are in their 27th year. Scientists and engineers who worked continuously on the development of aerospace technology during that period are approaching retirement. The resulting loss to the organization will be considerable. Although this problem is general to the NASA community, the problem was explored in terms of the institutional memory and technical expertise of a single individual in the Man-Systems division. The main domain of the expert was spacecraft lighting, which became the subject area for analysis in these studies. The report starts with an analysis of the cumulative expertise and institutional memory of technical employees of organizations such as NASA. A set of solutions to this problem are examined and found inadequate. Two solutions were investigated at length: hypertext and expert systems. Illustrative examples were provided of hypertext and expert system representation of spacecraft lighting. These computer technologies can be used to ameliorate the problem of the loss of invaluable personnel.

  5. Military engine computational structures technology

    NASA Technical Reports Server (NTRS)

    Thomson, Daniel E.

    1992-01-01

    Integrated High Performance Turbine Engine Technology Initiative (IHPTET) goals require a strong analytical base. Effective analysis of composite materials is critical to life analysis and structural optimization. Accurate life prediction for all material systems is critical. User friendly systems are also desirable. Post processing of results is very important. The IHPTET goal is to double turbine engine propulsion capability by the year 2003. Fifty percent of the goal will come from advanced materials and structures, the other 50 percent will come from increasing performance. Computer programs are listed.

  6. 48 Years with holography

    NASA Astrophysics Data System (ADS)

    Kubota, Toshihiro

    2014-11-01

    The invention of holography was epoch-making in optics. Although the research on holography has cycled through active and stagnant periods, holography has gradually become a practical technique thanks to researchers' steady efforts. The technique has many attractive features and is used in many fields nowadays. The latest developments in high-definition image sensors and ultrashort pulsed lasers have given rise to a new possibility of holography. I have been engaged in the research and development of holography since I knew it by casual opportunity. In this paper, the research in early stages of holography is briefly described, and some of my basic and applied research in which I have so far engaged are introduced.

  7. Practical holography IV; Proceedings of the Meeting, LOS Angeles, CA, Jan. 18, 19, 1990

    NASA Astrophysics Data System (ADS)

    Benton, Stephen A.

    1990-05-01

    Various papers on practical holography are presented. Individual topics addressed include: dichromated gelatin for holographic optical elements, novel enhancement of photopolymers, photopolymers for holography, new rehalogenating bleach for the production of Lippmann holograms, effects of bleach constituents on the performance of silver-halide holograms, highly sensitive positive resists for holography, holographic 3-D printer, generation of high-quality holograms with liquid-crystal SLM, display holography for medical tomography, 3-D display of ultrasound B-mode image by holographic stereogram, edge-lit rainbow holograms, electronic display system for computational holography, and DCG recording with red light. Also discussed are: corneal topography via two-wavelength holography, optically produced cylindrical HOEs for signal-processing applications, hybrid diffractive-refractive telescope, volume IR reflective gratings, holographic lithography for microcircuits, photorefractive waveguide grating switches for optical interconnects, non-Fourier computer-generated holography for 3-D display, phase selection in binary-phase-only filters for optical pattern recognition.

  8. Faculty Computer Expertise and Use of Instructional Technology. Technology Survey.

    ERIC Educational Resources Information Center

    Gabriner, Robert; Mery, Pamela

    This report shows the findings of a 1997 technology survey used to assess degrees of faculty computer expertise and the use of instructional technology. Part 1 reviews general findings of the fall 1997 technology survey: (1) the level of computer expertise among faculty, staff and administrators appears to be increasing; (2) in comparison with the…

  9. Photon correlation holography.

    PubMed

    Naik, Dinesh N; Singh, Rakesh Kumar; Ezawa, Takahiro; Miyamoto, Yoko; Takeda, Mitsuo

    2011-01-17

    Unconventional holography called photon correlation holography is proposed and experimentally demonstrated. Using photon correlation, i.e. intensity correlation or fourth order correlation of optical field, a 3-D image of the object recorded in a hologram is reconstructed stochastically with illumination through a random phase screen. Two different schemes for realizing photon correlation holography are examined by numerical simulations, and the experiment was performed for one of the reconstruction schemes suitable for the experimental proof of the principle. The technique of photon correlation holography provides a new insight into how the information is embedded in the spatial as well as temporal correlation of photons in the stochastic pseudo thermal light. PMID:21263682

  10. Advanced laptop and small personal computer technology

    NASA Technical Reports Server (NTRS)

    Johnson, Roger L.

    1991-01-01

    Advanced laptop and small personal computer technology is presented in the form of the viewgraphs. The following areas of hand carried computers and mobile workstation technology are covered: background, applications, high end products, technology trends, requirements for the Control Center application, and recommendations for the future.

  11. Computer Technologies 1.An Alien Autopsy

    E-print Network

    North Carolina at Chapel Hill, University of

    Computer Technologies 1.An Alien Autopsy 2. Hardware and Software 3. The WIMP interface #12 · Motherboard · Memory · Processor · Chips #12;Implementation Technology · Relays · Vacuum Tubes · Transistors;Implementation Technology · Common Links? · A controllable switch · Computers are wires and switches #12;Chips

  12. Computing as Interaction: Agent and Agreement Technologies

    Microsoft Academic Search

    Michael Luck; Peter McBurney

    With the emergence of new paradigms for computing, such as peer-to-peer technologies, grid computing, autonomic computing and other approaches, it is becoming increasingly natural to view large systems in terms of the services they offer, and consequently in terms of the entities or agents providing or consuming services. For example, web services technologies provide a standard means of interoperating be-

  13. Holography in Japan

    Microsoft Academic Search

    Toshihiro Kubota

    1998-01-01

    The present state of activities of holography in Japan is reviewed. Electro-holography, holographic 3D printer, recording material have been studying in research organizations, universities, and research institutes. Optical head using hologram has been developed by main electric companies. The market of hologram in security is going to extend. Several private and group exhibitions were opened within a year. HODIC meeting

  14. Computer Technology: State of the Art.

    ERIC Educational Resources Information Center

    Withington, Frederic G.

    1981-01-01

    Describes the nature of modern general-purpose computer systems, including hardware, semiconductor electronics, microprocessors, computer architecture, input output technology, and system control programs. Seven suggested readings are cited. (FM)

  15. Disruptive technology business models in cloud computing

    E-print Network

    Krikos, Alexis Christopher

    2010-01-01

    Cloud computing, a term whose origins have been in existence for more than a decade, has come into fruition due to technological capabilities and marketplace demands. Cloud computing can be defined as a scalable and flexible ...

  16. Research of cloud computing data security technology

    Microsoft Academic Search

    Yubo Tan; Xinlei Wang

    2012-01-01

    With cloud computing applications and research at home and abroad continue to advance cloud computing platform for users and data exchange between the greater the amount of user data transmission and storage a security threat, a cloud computing security is an important issue to be resolved. In this paper, all with state of encryption technology, presents a cloud computing data

  17. Holography - Application To Art: Curatorial Observations

    NASA Astrophysics Data System (ADS)

    Dinsmore, Sydney

    1987-06-01

    An exploration of the need to define a specific and critical language to describe the art of holography. Within any discussion of art, critical analysis must maintain an objective openess, particularily when the discourse concerns new media. To apply technological invention to art, new media is often without precedent on which to base criticism and bias. For this reason, holography falls prey to comparative rhetoric and established evaluation of other forms of imaging,as photography emulated the compositional romanticism of painting initially. Isolated and often misunderstood within the context of history, new media vascillates between legitimacy and curiosity in an attempt to create specific parameters to identify perceptual transition.

  18. Marketing the Monster: Advertising Computer Technology

    Microsoft Academic Search

    William Aspray; Donald de B. Beaver

    1986-01-01

    Interpreting the rich and striking blend of technical, intellectual, economic, social, and cultural information in advertisements of computer technology reveals how popular understanding and perceptions of the meaning of computers changed between 1950 and 1980. The study's findings contribute to the historical understanding of the social diffusion of the technology in society; its methodology illustrates the historiographic strengths and weaknesses

  19. Theory-Guided Technology in Computer Science.

    ERIC Educational Resources Information Center

    Ben-Ari, Mordechai

    2001-01-01

    Examines the history of major achievements in computer science as portrayed by winners of the prestigious Turing award and identifies a possibly unique activity called Theory-Guided Technology (TGT). Researchers develop TGT by using theoretical results to create practical technology. Discusses reasons why TGT is practical in computer science and…

  20. Information Security Technology Based on DNA Computing

    Microsoft Academic Search

    Guangzhao Cui; Limin Qin; Yanfeng Wang; Xuncai Zhang

    2007-01-01

    DNA computing is a new method of simulating biomolecular structure of DNA and computing by means of molecular biology technological computation. It introduces a fire-new data structure and calculating method, providing a new way for solving the NP-complete problem. It is a new computational method by harnessing the enormous parallel computing ability and high memory density of bio-molecules, which brings

  1. Technologies for Visualization in Computational Aerosciences

    NASA Technical Reports Server (NTRS)

    Miceli, Kristina D.; Cooper, D. M. (Technical Monitor)

    1993-01-01

    State-of-the-art research in computational aerosciences produces' complex, time-dependent datasets. Simulations can also be multidisciplinary in nature, coupling two or more physical disciplines such as fluid dynamics, structural dynamics, thermodynamics, and acoustics. Many diverse technologies are necessary for visualizing computational aerosciences simulations. This paper describes these technologies and how they contribute to building effective tools for use by domain scientists. These technologies include data management, distributed environments, advanced user interfaces, rapid prototyping environments, parallel computation, and methods to visualize the scalar and vector fields associated with computational aerosciences datasets.

  2. From Computer Lab to Technology Class.

    ERIC Educational Resources Information Center

    Sherwood, Sandra

    1999-01-01

    Discussion of integrating technology into elementary school classrooms focuses on teacher training that is based on a three-year plan developed at an elementary school in Marathon, New York. Describes the role of a technology teacher who facilitates technology integration by running the computer lab, offering workshops, and developing inservice…

  3. When Computer Technologies Meet the Learning Sciences

    Microsoft Academic Search

    John Bransford; Sean Brophy; Susan Williams

    2000-01-01

    This article explores how insights from the learning sciences can guide the effective use of computer technologies to promote learning and how these technologies make new types of learning opportunities possible. The discussion is organized to provide three illustrations of how the introduction of new technologies can have “ripple effects” that influence many different aspects of the teaching and learning

  4. Campus Computer Store Information Technology Services

    E-print Network

    Saskatchewan, University of

    Campus Computer Store Information Technology Services 20 Place Riel, 1 Campus Drive 966-8375 ccs Computer Store is administering a license for SAS. It is licensed on a yearly pro-rated basis as outlined: _____________________________________________________ Student Number (if applicable): _______________________________________________ Location of Computer

  5. Computer Technology Resources for Literacy Projects.

    ERIC Educational Resources Information Center

    Florida State Council on Aging, Tallahassee.

    This resource booklet was prepared to assist literacy projects and community adult education programs in determining the technology they need to serve more older persons. Section 1 contains the following reprinted articles: "The Human Touch in the Computer Age: Seniors Learn Computer Skills from Schoolkids" (Suzanne Kashuba); "Computer Instruction…

  6. Employee Resistance to Computer Technology.

    ERIC Educational Resources Information Center

    Ewert, Alan

    1984-01-01

    The introduction of computers to the work place may cause employee stress. Aggressive, protective, and avoidance behaviors are forms of staff resistance. The development of good training programs will enhance productivity. Suggestions for evaluating computer systems are offered. (DF)

  7. Transformable computers & hardware object technology

    Microsoft Academic Search

    John Schewel; Michael Thornburg; Steve Casselman

    1995-01-01

    We define transformable computing systems as those machines that use the reconfigurable aspects of field programmable gate arrays (FPGA) to implement an algorithm. Researchers throughout the world have shown that computationally intensive software algorithms can be transposed directly into hardware design for extreme performance gain. The on-the-fly use of digital designs in a reconfigurable computer can easily be utilized from

  8. Computer Crime: A Technology Gap

    Microsoft Academic Search

    JAMES A. FAGIN

    1991-01-01

    A review of current industrial practices, litigation trends, and the growing use of computer data banks and networks leads to the following conclusions about computer crime: data security and integrity are frequently compromised by lax security practices and operating procedures. Frequently the perceived but erroneous assumption that the inherent difficulty of the computer operating system will detour would-be violators is

  9. Moral Responsibility and Computer Technology.

    ERIC Educational Resources Information Center

    Friedman, Batya

    Noting a recent increase in the number of cases of computer crime and computer piracy, this paper takes up the question, "How can understanding the social context of computing help us--as parents, educators, and members of government and industry--to educate young people to become morally responsible members of an electronic information…

  10. Computing, Information and Communications Technology (CICT) Website

    NASA Technical Reports Server (NTRS)

    Hardman, John; Tu, Eugene (Technical Monitor)

    2002-01-01

    The Computing, Information and Communications Technology Program (CICT) was established in 2001 to ensure NASA's Continuing leadership in emerging technologies. It is a coordinated, Agency-wide effort to develop and deploy key enabling technologies for a broad range of mission-critical tasks. The NASA CICT program is designed to address Agency-specific computing, information, and communications technology requirements beyond the projected capabilities of commercially available solutions. The areas of technical focus have been chosen for their impact on NASA's missions, their national importance, and the technical challenge they provide to the Program. In order to meet its objectives, the CICT Program is organized into the following four technology focused projects: 1) Computing, Networking and Information Systems (CNIS); 2) Intelligent Systems (IS); 3) Space Communications (SC); 4) Information Technology Strategic Research (ITSR).

  11. (CICT) Computing, Information, and Communications Technology Overview

    NASA Technical Reports Server (NTRS)

    VanDalsem, William R.

    2003-01-01

    The goal of the Computing, Information, and Communications Technology (CICT) program is to enable NASA's Scientific Research, Space Exploration, and Aerospace Technology Missions with greater mission assurance, for less cost, with increased science return through the development and use of advanced computing, information and communications technologies. This viewgraph presentation includes diagrams of how the political guidance behind CICT is structured. The presentation profiles each part of the NASA Mission in detail, and relates the Mission to the activities of CICT. CICT's Integrated Capability Goal is illustrated, and hypothetical missions which could be enabled by CICT are profiled. CICT technology development is profiled.

  12. Centre for Quantum Computation & Communication Technology

    NSDL National Science Digital Library

    This is the homepage of "an Australian multi-university collaboration undertaking research on the fundamental physics and technology of building, at the atomic level, a solid state quantum computer in silicon together with other high potential implementations." Although attempts to develop a quantum computer have met with limited success, the centre has substantial resources invested in advancing toward practical uses of quantum computing technology. The site provides a very good introduction to the principles and implications of quantum computing, as well as details about various research projects underway at the Australian universities. Links to conference and journal papers produced by members of the centre, many from 2003, are also provided.

  13. Roadmap: Computer Technology Network Technology Associate of Applied Business

    E-print Network

    Khan, Javed I.

    as critical (in boldface and shaded areas) must be completed in the semester listed to ensure a timelyRoadmap: Computer Technology ­ Network Technology ­ Associate of Applied Business [RE graduation. Kent Core Summary (visit www.kent.edu/catalog/kent-core for course list) Kent Core Categories

  14. Roadmap: Computer Technology Application Development Technology Associate of Applied Business

    E-print Network

    Khan, Javed I.

    and milestones designated as critical (in boldface and shaded areas) must be completed in the semester listedRoadmap: Computer Technology ­ Application Development Technology ­ Associate of Applied Business to ensure a timely graduation. Kent Core Summary (visit www.kent.edu/catalog/kent-core for course list) Kent

  15. Roadmap: Computer Technology General Technology Associate of Applied Business

    E-print Network

    Khan, Javed I.

    as critical (in boldface and shaded areas) must be completed in the semester listed to ensure a timelyRoadmap: Computer Technology ­ General Technology ­ Associate of Applied Business [RE graduation. Kent Core Summary (visit www.kent.edu/catalog/kent-core for course list) Kent Core Categories

  16. Tsunami Technologies: Online Cluster Computing

    NSDL National Science Digital Library

    TTI provides a unique cluster computing service accessible online from anywhere. TTI is committed to providing up-to-date, industry recognized, high performance computing (HPC) systems and services to companies and academia with the absolute best in customer service and support. And, because it is affordable, our services are even within reach of the individual scientist.

  17. Conductivity of a strange metal: from holography to memory functions

    NASA Astrophysics Data System (ADS)

    Lucas, Andrew

    2015-03-01

    We study the electrical response of a wide class of strange metal phases without quasiparticles at finite temperature and charge density, with explicitly broken translational symmetry, using holography. The low frequency electrical conductivity exhibits a Drude peak, so long as momentum relaxation is slow. The relaxation time and the direct current conductivity are exactly equal to what is computed, independently of holography, via the memory function framework.

  18. Technologic advances in computed tomography

    SciTech Connect

    Villafana, T. (Temple Univ. Hospital, Philadelphia, PA (USA))

    1991-04-01

    Technologic improvements in CT continue. As always, emphasis in the past year has been on reducing scan times. Units employing slip-ring technology are now available. This technology makes possible spiral scanning, which promises to further reduce the effects of image-degrading patient motion, as well as opening new possibilities for quantitative and dynamic CT studies. These applications are discussed here and an update on the advances on cine-CT and the Dynamic Spatial Reconstructor unit is provided. Three-dimensional reconstructions obtained at very short scan times promise to be of particular benefit for scanning the bronchial tree. Finally, patient doses of radiation in CT are discussed.

  19. Beyond Computation: Information Technology, Organizational

    E-print Network

    technologies, such as the telegraph, the steam engine and the electric motor, illustrate a pattern of information that can be digitized--numbers, text, video, music, speech, programs, and engineer- ing drawings

  20. Localization & exact holography

    NASA Astrophysics Data System (ADS)

    Dabholkar, Atish; Gomes, João; Murthy, Sameer

    2013-04-01

    We consider the AdS 2 /CFT 1 holographic correspondence near the horizon of big four-dimensional black holes preserving four supersymmetries in toroidally compactified Type-II string theory. The boundary partition function of CFT 1 is given by the known quantum degeneracies of these black holes. The bulk partition function is given by a functional integral over string fields in AdS 2. Using recent results on localization we reduce the infinite-dimensional functional integral to a finite number of ordinary integrals over a space of localizing instantons. Under reasonable assumptions about the relevant terms in the effective action, these integrals can be evaluated exactly to obtain a bulk partition function. It precisely reproduces all terms in the exact Rademacher expansion of the boundary partition function as nontrivial functions of charges except for the Kloosterman sum which can in principle follow from an analysis of phases in the background of orbifolded instantons. Our results can be regarded as a step towards proving `exact holography' in that the bulk and boundary partition functions computed independently agree for finite charges. Since the bulk partition function defines the quantum entropy of the black hole, our results enable the evaluation of perturbative as well as nonperturbative quantum corrections to the Bekenstein-Hawking-Wald entropy of these black holes.

  1. Implementing Computer Technologies: Teachers' Perceptions and Practices

    ERIC Educational Resources Information Center

    Wozney, Lori; Venkatesh, Vivek; Abrami, Philip

    2006-01-01

    This study investigates personal and setting characteristics, teacher attitudes, and current computer technology practices among 764 elementary and secondary teachers from both private and public school sectors in Quebec. Using expectancy-value theory, the Technology Implementation Questionnaire (TIQ) was developed; it consists of 33 belief items…

  2. OFFICE OF INFORMATION TECHNOLOGY COMPUTER SECURITY POLICY

    E-print Network

    Hemmers, Oliver

    OFFICE OF INFORMATION TECHNOLOGY COMPUTER SECURITY POLICY RESPONsmLE ADMINISTRATOR: RESPONsm Manual, Chapter 14: Data and Information Security, Section 4, Information Security Plans ­ Physical%20-%20DATA%20AND%20INFORMATION%20SECURITY.pdf. CONTACTS Refer to the Office of Information Technology

  3. Computer Technology: For Better or Worse?

    ERIC Educational Resources Information Center

    Ware, Willis H.

    Computer technology ought to be among the most helpful and useful of any technology, but if it is not treated with care, the society will be worse off for it. The Federal Privacy Act of 1974 established the Privacy Protection Study Commission whose business started in June, 1975. In examination of the private sector, the commission's…

  4. http://computer.org Innovative Technology for Computer Professionals

    E-print Network

    Shahabi, Cyrus

    Technology for Computer Professionals #12;0018-9162/02/$17.00 © 2002 IEEE56 Computer Yima: A Second and developed a second-generation CM server that demonstrates several advanced concepts. We call our system Yima, a name denoting the first man in ancient Iranian religion. While Yima has not achieved the refinement

  5. High Performance Computing Technologies Jack Dongarra

    E-print Network

    Dongarra, Jack

    1 High Performance Computing Technologies Jack Dongarra University of Tennessee Oak Ridge National ffl Performance Evaluation -- Linpack Benchmark, Top500 -- ParkBench 3 Computational Science ffl HPC -- noise/vibrational optimization -- traffic simulation ffl Main gains: -- reduced time to market of new

  6. High Performance Computing Technologies Jack Dongarra

    E-print Network

    Dongarra, Jack

    1 High Performance Computing Technologies Jack Dongarra University of Tennessee Oak Ridge National Benchmark, Top500 ParkBench 3 Computational Science HPC o ered a new way to do science: Experiment Theory: aerodynamics similar to aerospace industry crash simulation metal sheet forming noise vibrational optimization

  7. Nature-Inspired Computing Technology and Applications

    Microsoft Academic Search

    P Marrow

    2000-01-01

    Increasing demands upon current computer systems, along with technological changes, create a need for more flexible and adaptable systems. Natural systems provide many examples of the type of versatile system required. This paper reviews examples of nature-inspired computing, drawing inspiration from many different areas of living systems including evolution, ecology, development and behaviour. The implications for the future development of

  8. Computer Technology and the Social Studies.

    ERIC Educational Resources Information Center

    Glenn, Allen D.; Klassen, Daniel L.

    1983-01-01

    The citizen of tomorrow needs to understand the role of information in political systems; computer technology and information storage, retrieval, and use; the implications of information systems for individual rights; and the impact of computer crime, databanks, and systems analysis on the social, economic, and political spheres. (QKR)

  9. On the Emergence of New Computer Technologies

    ERIC Educational Resources Information Center

    Asaolu, Olumuyiwa Sunday

    2006-01-01

    This work presents a review of the development and application of computers. It traces the highlights of emergent computing technologies shaping our world. Recent trends in hardware and software deployment are chronicled as well as their impact on various segments of the society. The expectations for the future are also discussed along with…

  10. Computer Maintenance Technology. Suggested Basic Course Outline.

    ERIC Educational Resources Information Center

    Texas A and M Univ., College Station. Vocational Instructional Services.

    This competency-based basic course outline is designed for a two-year secondary program in computer maintenance technology. The first year is devoted to basic electricity and electronics, the second to the troubleshooting, maintenance, and service of microcomputers. (The repair section is based upon the Apple II computer, disc drive, monitor, and…

  11. Computer technology forecast study for general aviation

    NASA Technical Reports Server (NTRS)

    Seacord, C. L.; Vaughn, D.

    1976-01-01

    A multi-year, multi-faceted program is underway to investigate and develop potential improvements in airframes, engines, and avionics for general aviation aircraft. The objective of this study was to assemble information that will allow the government to assess the trends in computer and computer/operator interface technology that may have application to general aviation in the 1980's and beyond. The current state of the art of computer hardware is assessed, technical developments in computer hardware are predicted, and nonaviation large volume users of computer hardware are identified.

  12. Coherence holography and photon-correlation holography: marriage between holography and statistical optics

    NASA Astrophysics Data System (ADS)

    Takeda, Mitsuo; Wang, Wei; Naik, Dinesh N.

    2011-10-01

    We review two techniques of unconventional holography, coherence holography and photon-correlation holography, which we recently proposed and experimentally demonstrated. We will emphasize the importance of noticing mathematical analogies in optics and physical phenomena, which give insights into the methodology for developing new techniques.

  13. Model-Trained Neural Networks and Electronic Holography Demonstrated to Detect Damage in Blades

    NASA Technical Reports Server (NTRS)

    Decker, Arthur J.; Fite, E. Brian; Mehmed, Oral; Thorp, Scott A.

    1998-01-01

    Detect Damage in Blades Electronic holography can show damaged regions in fan blades at 30 frames/sec. The electronic holograms are transformed by finite-element-model-trained artificial neural networks to visualize the damage. The trained neural networks are linked with video and graphics to visualize the bending-induced strain distribution, which is very sensitive to damage. By contrast, it is very difficult to detect damage by viewing the raw, speckled, characteristic fringe patterns. For neural-network visualization of damage, 2 frames or 2 fields are used, rather than the 12 frames normally used to compute the displacement distribution from electronic holograms. At the NASA Lewis Research Center, finite element models are used to compute displacement and strain distributions for the vibration modes of undamaged and cracked blades. A model of electronic time-averaged holography is used to transform the displacement distributions into finite-element-resolution characteristic fringe patterns. Then, a feedforward neural network is trained with the fringe-pattern/strain-pattern pairs, and the neural network, electronic holography, and video are implemented on a workstation. Now that the neural networks have been tested successfully at 30 frames/sec on undamaged and cracked cantilevers, the electronic holography and neural-network processing are being adapted for onsite damage inspection of twisted fan blades and rotormounted blades. Our conclusion is that model-trained neural nets are effective when they are trained with good models whose application is well understood. This work supports the aeromechanical testing portion of the Advanced Subsonic Technology Project.

  14. Research on Key Technologies of Cloud Computing

    NASA Astrophysics Data System (ADS)

    Zhang, Shufen; Yan, Hongcan; Chen, Xuebin

    With the development of multi-core processors, virtualization, distributed storage, broadband Internet and automatic management, a new type of computing mode named cloud computing is produced. It distributes computation task on the resource pool which consists of massive computers, so the application systems can obtain the computing power, the storage space and software service according to its demand. It can concentrate all the computing resources and manage them automatically by the software without intervene. This makes application offers not to annoy for tedious details and more absorbed in his business. It will be advantageous to innovation and reduce cost. It's the ultimate goal of cloud computing to provide calculation, services and applications as a public facility for the public, So that people can use the computer resources just like using water, electricity, gas and telephone. Currently, the understanding of cloud computing is developing and changing constantly, cloud computing still has no unanimous definition. This paper describes three main service forms of cloud computing: SAAS, PAAS, IAAS, compared the definition of cloud computing which is given by Google, Amazon, IBM and other companies, summarized the basic characteristics of cloud computing, and emphasized on the key technologies such as data storage, data management, virtualization and programming model.

  15. Future Applications of Electronic Technology to Education.

    ERIC Educational Resources Information Center

    Lewis, Arthur J.; And Others

    Developments in electronic technology that have improved and linked together telecommunication and computers are discussed, as well as their use in instruction, implications of this use, and associated issues. The first section briefly describes the following developments: microcomputers and microprocessors, bubble memory, lasers, holography

  16. Computer Game and Simulation Technology

    NSDL National Science Digital Library

    This video, created by ATETV and presented by WGBH, takes a look at the Computer Game and Simulation program at Wake Technical Community College. This video provides an overview of the diverse range of classes that the program offers, as well as how students can specialize their education within the field. This video also explains that by studying game development students can also find a career in simulation development in almost any industry. This video is helpful for anyone interested in the field of game design or graphic design. Educators will also find a background essay, discussion questions, and standards alignment for the material. Running time for the video is 2:54.

  17. Development of a Novel Breast Cancer Detector based on Improved Holography Concave Grating Imaging Spectrometer

    NASA Astrophysics Data System (ADS)

    Ren, Zhong; Liu, Guodong; Zeng, Lvming; Huang, Zhen

    2011-01-01

    Breast cancer can be detected by B-mode ultrasonic imaging, X-mammography, CT imaging, and MRI. But some drawbacks existed in these methods, their applications was limited in some certain. So, a novel high resolution breast cancer detector (BCD) is developed in this paper. Meanwhile, an improved holography concave grating imaging spectrometer (HCGIS) is designed. In this HCGIS, the holography concave grating is used as the diffraction grating. Additionally, CCD with combined image acquisition (IAQ) card and the 3D scan platform are used as the spectral image acquisition component. This BCD consists of the light source unit, light-path unit, check cavity, splitting-light unit, spectrum acquisition and imaging unit, signal processing unit, computer and data analysis software unit, etc. Experimental results show that the spectral range of the novel BCD can reach 300-1000 nm, its wavelength resolution can reach 1nm, and this system uses the back-split-light technology and the splitting-light structure of holography concave grating. Compared with the other instruments of breast cancer detection, this BCD has many advantages, such as, compacter volume, simpler algorithm, faster processing speed, higher accuracy, cheaper cost and higher resolution, etc. Therefore, this BCD will have the potential values in the detection of breast disease.

  18. Real-time visualization and analysis of airflow field by use of digital holography

    NASA Astrophysics Data System (ADS)

    Di, Jianglei; Wu, Bingjing; Chen, Xin; Liu, Junjiang; Wang, Jun; Zhao, Jianlin

    2013-04-01

    The measurement and analysis of airflow field is very important in fluid dynamics. For airflow, smoke particles can be added to visually observe the turbulence phenomena by particle tracking technology, but the effect of smoke particles to follow the high speed airflow will reduce the measurement accuracy. In recent years, with the advantage of non-contact, nondestructive, fast and full-field measurement, digital holography has been widely applied in many fields, such as deformation and vibration analysis, particle characterization, refractive index measurement, and so on. In this paper, we present a method to measure the airflow field by use of digital holography. A small wind tunnel model made of acrylic glass is built to control the velocity and direction of airflow. Different shapes of samples such as aircraft wing and cylinder are placed in the wind tunnel model to produce different forms of flow field. With a Mach-Zehnder interferometer setup, a series of digital holograms carrying the information of airflow filed distributions in different states are recorded by CCD camera and corresponding holographic images are numerically reconstructed from the holograms by computer. Then we can conveniently obtain the velocity or pressure information of the airflow deduced from the quantitative phase information of holographic images and visually display the airflow filed and its evolution in the form of a movie. The theory and experiment results show that digital holography is a robust and feasible approach for real-time visualization and analysis of airflow field.

  19. Computer Technology and College Students' Reading Habits

    Microsoft Academic Search

    Li-Bi Shen

    2006-01-01

    The purposes of this study were to determine if computer technology had an impact on EFL college students' reading habits and if students' online reading habits and their demographic variables, such as gender, age, CJEE scores, employment status, and online hours were related. 124 valid survey questionnaires were collected from college students in a university in southern Taiwan. The results

  20. Soft computing technologies in nuclear engineering applications

    Microsoft Academic Search

    Lefteri H. Tsoukalas

    1999-01-01

    The application of soft computing technologies, particularly neural networks, fuzzy logic, and genetic algorithms, to the surveillance, diagnostics and operation of nuclear power plants and their components is an area that has great potential for exploitation. Areas of potential application are to the surveillance and diagnostics of complete nuclear power plants and to specific systems such as check valves, instrumentation

  1. Reviews of computing technology: Client-server technology

    SciTech Connect

    Johnson, S.M.

    1990-09-01

    One of the most frequently heard terms in the computer industry these days is ``client-server.`` There is much misinformation available on the topic, and competitive pressures on software vendors have led to a great deal of hype with little in the way of supporting products. The purpose of this document is to explain what is meant by client-server applications, why the Advanced Technology and Architecture (ATA) section of the Information Resources Management (IRM) Department sees this emerging technology as key for computer applications during the next ten years, and what ATA sees as the existing standards and products available today. Because of the relative immaturity of existing client-server products, IRM is not yet guidelining any specific client-server products, except those that are components of guidelined data communications products or database management systems.

  2. Reviews of computing technology: Client-server technology

    SciTech Connect

    Johnson, S.M.

    1990-09-01

    One of the most frequently heard terms in the computer industry these days is client-server.'' There is much misinformation available on the topic, and competitive pressures on software vendors have led to a great deal of hype with little in the way of supporting products. The purpose of this document is to explain what is meant by client-server applications, why the Advanced Technology and Architecture (ATA) section of the Information Resources Management (IRM) Department sees this emerging technology as key for computer applications during the next ten years, and what ATA sees as the existing standards and products available today. Because of the relative immaturity of existing client-server products, IRM is not yet guidelining any specific client-server products, except those that are components of guidelined data communications products or database management systems.

  3. Holography at x-ray wavelengths

    SciTech Connect

    Solem, T.C.; Baldwin, G.C.; Chapline, G.F.

    1981-01-01

    We discuss alternative holographic techniques for imaging microscopic structures with a short-pulse, high intensity, high-quantum-energy laser. We find that Fresnel transform holography using a photoresist for registration of the hologram is most likely to be within the scope of near term technology. Although it has advantages in time gating, using an in-line electron microscope for hologram registration has an unacceptable tradeoff between quantum efficiency and resolution. Fourier transform holography using a reflector to generate the reference beam might be a reasonable alternative using low resolution film, but is necessarily more complicated. We discuss the dependence of the required laser intensity on the resolution sought and on the elastic and absorption cross sections. We conclude that resonant scattering must be used to obtain holograms at reasonable intensities.

  4. Ultrarealistic imaging: the future of display holography

    NASA Astrophysics Data System (ADS)

    Bjelkhagen, Hans I.; Brotherton-Ratcliffe, David

    2014-11-01

    Ultrarealistic imaging is the science of producing images that faithfully recreate the light field surrounding an object, such that the unaided eye of a human observer cannot distinguish the difference between the original and the image. Recent technology improvements are now set to transform the fields of both analog and digital display holography, permitting both techniques to operate in the ultrarealistic regime. In particular, ultrarealistic analog holograms have now heralded the serious use of holography in such areas as museum display and cultural heritage protection. These full-color holograms are characterized by a substantially lower noise and a greater spectral fidelity. New recording systems, based on recent diode-pumped solid-state and semiconductor lasers combined with recording materials and processing, have been behind these improvements. Progress in illumination technology, however, has also led to a major reduction in display noise and to a significant increase in the clear image depth and brightness of holograms. Recent progress in one-step direct-write digital holography (DWDH) is now also opening the way to the creation of a new type of ultrarealistic display: the high virtual volume display. This is a large format full-parallax DWDH reflection hologram having a fundamentally larger clear image depth.

  5. Reviews of computing technology: Object-oriented technology

    SciTech Connect

    Skeen, D.C.

    1993-03-01

    A useful metaphor in introducing object-oriented concepts is the idea of a computer hardware manufacturer assembling products from an existing stock of electronic parts. In this analogy, think of the parts as pieces of computer software and of the finished products as computer applications. Like its counterpart, the object is capable of performing its specific function in a wide variety of different applications. The advantages to assembling hardware using a set of prebuilt parts are obvious. The design process is greatly simplified in this scenario, since the designer needs only to carry the design down to the chip level, rather than to the transistor level. As a result, the designer is free to develop a more reliable and feature rich product. Also, since the component parts are reused in several different products, the parts can be made more robust and subjected to more rigorous testing than would be economically feasible for a part used in only one piece of equipment. Additionally, maintenance on the resulting systems is simplified because of the part-level consistency from one type of equipment to another. The remainder of this document introduces the techniques used to develop objects, the benefits of the technology, outstanding issues that remain with the technology, industry direction for the technology, and the impact that object-oriented technology is likely to have on the organization. While going through this material, the reader will find it useful to remember the parts analogy and to keep in mind that the overall purpose of object-oriented technology is to create software parts and to construct applications using those parts.

  6. Multiple-image encryption by compressive holography.

    PubMed

    Di, Hong; Zheng, Kangfeng; Zhang, Xin; Lam, Edmund Y; Kim, Taegeun; Kim, You Seok; Poon, Ting-Chung; Zhou, Changhe

    2012-03-01

    We present multiple-image encryption (MIE) based on compressive holography. In the encryption, a holographic technique is employed to record multiple images simultaneously to form a hologram. The two-dimensional Fourier data of the hologram are then compressed by nonuniform sampling, which gives rise to compressive encryption. Decryption of individual images is cast into a minimization problem. The minimization retains the sparsity of recovered images in the wavelet basis. Meanwhile, total variation regularization is used to preserve edges in the reconstruction. Experiments have been conducted using holograms acquired by optical scanning holography as an example. Computer simulations of multiple images are subsequently demonstrated to illustrate the feasibility of the MIE scheme. PMID:22410905

  7. Evaluation of Advanced Computing Techniques and Technologies: Reconfigurable Computing

    NASA Technical Reports Server (NTRS)

    Wells, B. Earl

    2003-01-01

    The focus of this project was to survey the technology of reconfigurable computing determine its level of maturity and suitability for NASA applications. To better understand and assess the effectiveness of the reconfigurable design paradigm that is utilized within the HAL-15 reconfigurable computer system. This system was made available to NASA MSFC for this purpose, from Star Bridge Systems, Inc. To implement on at least one application that would benefit from the performance levels that are possible with reconfigurable hardware. It was originally proposed that experiments in fault tolerance and dynamically reconfigurability would be perform but time constraints mandated that these be pursued as future research.

  8. Technologies for Achieving Field Ubiquitous Computing

    NASA Astrophysics Data System (ADS)

    Nagashima, Akira

    Although the term “ubiquitous” may sound like jargon used in information appliances, ubiquitous computing is an emerging concept in industrial automation. This paper presents the author's visions of field ubiquitous computing, which is based on the novel Internet Protocol IPv6. IPv6-based instrumentation will realize the next generation manufacturing excellence. This paper focuses on the following five key issues: 1. IPv6 standardization; 2. IPv6 interfaces embedded in field devices; 3. Compatibility with FOUNDATION fieldbus; 4. Network securities for field applications; and 5. Wireless technologies to complement IP instrumentation. Furthermore, the principles of digital plant operations and ubiquitous production to support the above key technologies to achieve field ubiquitous systems are discussed.

  9. Information Technology (IT) & Computers Contact Person

    E-print Network

    Watson, Craig A.

    Information Technology (IT) & Computers Contact Person: Winnie Lante Room B6-C N-Z Hall Ph: 846-0865 wdl@ufl.edu Karen Porter Rm B6-D N-Z Hall PH: 846-0854 Reed Lab PH: 392-9492 Karen.porter@ufl.edu E: (username: if-svc-forestry, password: forestry) 3. Select and open the Public Folders (bottom of left side

  10. Digital Holography Display (2)

    NASA Astrophysics Data System (ADS)

    Lee, Cheok Peng; Asundi, A.; Yu, Yang; Xiao, Zhen Zhong

    This paper describes the extension work from the last Digital Holography Projector System. From the developed works shows that, some unforeseen factors have created the difficulties for the system alignment. Such factors are the DMD frame rate, light source and diffractive zero order. It is really the challenging development works to achieve the virtual 3D model display on the high speed rotation screen. The three most key factors are emphasizing: 1) The display device's frame rate; 2) The light source orientation angle; and 3) The zero order filtering optic. 1) This device's is the digital micro mirror, in short is DMD. It is the high speed switching device has developed by the most recent technology. The switching frame rate can go up as high as 291fps. At first, the 8 bits depth file must be digitalized and stored for DMD onboard Ram. The digitalized data are transmitting from the PC USB to DMD onboard Ram. Instead of the data are downloading directly from the PC to DVI or VGA during display, this downloading method cause slower down the display speed, which is the common frame rate of 30 Hz. Next, the onboard Ram data then transfer to the DMD mirror's for display, at the 8 bits 291 fps speed. At this frame rate, the display 2D image can almost cover for 10 of out of the 360 0 in 1 revolution. 2) This laser light source must be installed such that free for orientated in any arbitrary angle from 220 to 450. Which is normalized to the DMD mirrors and the brief sketch show on figure (a). The purpose of orientated the light source is ensure that multi diffractive order would be reflected straight from the mirrors. (This multi diffractive order is the phenomenon of the digital micro mirror's characteristic). This mean, the reconstruct images would be followed the DMD normalized direction reflected up to fibre conduit. Moreover, this orientated method install of the laser light source is making space for other optical lenses or device driver/controller. Because, all equipments and components can be easy line up and mounted in the compartment. 3) This solid 6 mm diameter fibre conduit is implemented to transmit the higher diffractive image, it is also the brightest and clearer image as compare to other lower order images. This means many of the lower order and blurred images would be neglected for display and consider as the energy lost.

  11. Computational Support for Technology- Investment Decisions

    NASA Technical Reports Server (NTRS)

    Adumitroaie, Virgil; Hua, Hook; Lincoln, William; Block, Gary; Mrozinski, Joseph; Shelton, Kacie; Weisbin, Charles; Elfes, Alberto; Smith, Jeffrey

    2007-01-01

    Strategic Assessment of Risk and Technology (START) is a user-friendly computer program that assists human managers in making decisions regarding research-and-development investment portfolios in the presence of uncertainties and of non-technological constraints that include budgetary and time limits, restrictions related to infrastructure, and programmatic and institutional priorities. START facilitates quantitative analysis of technologies, capabilities, missions, scenarios and programs, and thereby enables the selection and scheduling of value-optimal development efforts. START incorporates features that, variously, perform or support a unique combination of functions, most of which are not systematically performed or supported by prior decision- support software. These functions include the following: Optimal portfolio selection using an expected-utility-based assessment of capabilities and technologies; Temporal investment recommendations; Distinctions between enhancing and enabling capabilities; Analysis of partial funding for enhancing capabilities; and Sensitivity and uncertainty analysis. START can run on almost any computing hardware, within Linux and related operating systems that include Mac OS X versions 10.3 and later, and can run in Windows under the Cygwin environment. START can be distributed in binary code form. START calls, as external libraries, several open-source software packages. Output is in Excel (.xls) file format.

  12. Digital holography to light field

    NASA Astrophysics Data System (ADS)

    Asundi, Anand; Zuo, Chao

    2014-05-01

    Holography uses wave (physical) optical principles of interference and diffraction to record and display images. Interference allows us to record the amplitude and phase of the optical wave emanating from an object on a film or recording medium and diffraction enables us to see this wave-field, i.e. the amplitude and phase of the object. Visually this corresponds to both perspective and depth information being reconstructed as in the original scene. Digital Holography has enabled quantification of phase which in some applications provides meaningful engineering parameters. There is growing interest in reconstructing this wavefield without interference. Thus the non-interferometric Transport of Intensity Equation (TIE) method is gaining increased research, which uses two or more defocused images to reconstruct the phase. Due to its non-interferometric nature, TIE relaxes the stringent beam-coherence requirements for interferometry, extending its applications to various optical fields with arbitrary spatial and temporal coherence. The alternate school of thought emerges from the computer science community primarily deals with ray optics. In a normal imaging system all rays emerging from an object point into are focused to a conjugate image point. Information of ray direction is lost and thus the perspective and depth information. A light field image is one that has information of both amplitude and direction of rays fanning from any object point and thus provides perspective (or what could be termed as phase) of the object wave as well. It would thus be possible to extract phase as we know it from this albeit for a coherent illumination case.

  13. 2D reconstruction of terahertz Gabor inline digital holography

    NASA Astrophysics Data System (ADS)

    Li, Yun-Da; Li, Qi; Hu, Jia-Qi; Zhao, Yongpeng

    2014-11-01

    Terahertz imaging can make up the defect of imaging opaque samples in visible light domain. Digital holography is a new technology for extracting full information of the original object. In the paper, the improved angular spectrum (AS) algorithm is coulping the original AS algorithm with direct current (DC) suppression method, apodization and piecewise-nonlinear transformation. The reconstruction characteristics of the algorithm have been studied by numerical analysis and experimental researches. The experimental results validate the application value of the algorithms in improving 2D reconstructed image quality in terahertz Gabor inline digital holography.

  14. Evaluating Computer Technology Integration in a Centralized School System

    ERIC Educational Resources Information Center

    Eteokleous, N.

    2008-01-01

    The study evaluated the current situation in Cyprus elementary classrooms regarding computer technology integration in an attempt to identify ways of expanding teachers' and students' experiences with computer technology. It examined how Cypriot elementary teachers use computers, and the factors that influence computer integration in their…

  15. Improving student retention in computer engineering technology

    NASA Astrophysics Data System (ADS)

    Pierozinski, Russell Ivan

    The purpose of this research project was to improve student retention in the Computer Engineering Technology program at the Northern Alberta Institute of Technology by reducing the number of dropouts and increasing the graduation rate. This action research project utilized a mixed methods approach of a survey and face-to-face interviews. The participants were male and female, with a large majority ranging from 18 to 21 years of age. The research found that participants recognized their skills and capability, but their capacity to remain in the program was dependent on understanding and meeting the demanding pace and rigour of the program. The participants recognized that curriculum delivery along with instructor-student interaction had an impact on student retention. To be successful in the program, students required support in four domains: academic, learning management, career, and social.

  16. Forbidden Landscape from Holography

    E-print Network

    Yu Nakayama

    2009-07-14

    We present a class of field configurations that are forbidden in the quantum gravity because of inconsistency in the dual field theory from holography. Scale invariant but non-conformal field theories are impossible in (1+1) dimension, and so should be the corresponding gravity dual. In particular, the "spontaneous Lorentz symmetry breaking" models and the "ghost condensation" models, which are well-studied in phenomenology literatures, are forbidden in any consistent quantum theories of gravity in (1+2) dimension since they predict such inconsistent field configurations.

  17. Dyonic Stars for Holography

    E-print Network

    Carney, Daniel

    2015-01-01

    We construct back-reacted asymptotically AdS_4 backgrounds with both electric and magnetic charge, at finite temperature and chemical potential. The system consists of a condensed bulk Dirac field hovering over a charged black brane. We give a detailed microscopic treatment of the bulk fermions, from which we derive the usual fluid approximations describing the condensate. In the context of holography, such a gravitational solution is dual to a (2+1)-dimensional CFT with a U(1) current, at finite density and strong coupling, subjected to a transverse magnetic field.

  18. Dyonic Stars for Holography

    E-print Network

    Daniel Carney; Mohammad Edalati

    2015-01-27

    We construct back-reacted asymptotically AdS_4 backgrounds with both electric and magnetic charge, at finite temperature and chemical potential. The system consists of a condensed bulk Dirac field hovering over a charged black brane. We give a detailed microscopic treatment of the bulk fermions, from which we derive the usual fluid approximations describing the condensate. In the context of holography, such a gravitational solution is dual to a (2+1)-dimensional CFT with a U(1) current, at finite density and strong coupling, subjected to a transverse magnetic field.

  19. The Intel Science and Technology Center for Social Computing

    E-print Network

    Dourish,Paul

    is Social What these examples teach us is that, however profoundly technology changes, driven by Moore's LawIntel Labs The Intel Science and Technology Center for Social Computing Abstract Social Computing is the study of information technologies and digital media as social and cultural phenomena. Rather than using

  20. Massachusetts Institute of Technology, Cambridge, Massachusetts Laboratory for Computer Science

    E-print Network

    Massachusetts Institute of Technology, Cambridge, Massachusetts Laboratory for Computer Science for Computer Science, Massachusetts Institute of Technology, 545 Technology Square, Cambridge, MA 02139, a perfect jailer For man or beast: the hundred eyes took turns At staring wide awake in pairs, and two

  1. Multi-field inflation from holography

    NASA Astrophysics Data System (ADS)

    Garriga, Jaume; Skenderis, Kostas; Urakawa, Yuko

    2015-01-01

    We initiate the study of multi-field inflation using holography. Bulk light scalar fields correspond to nearly marginal operators in the boundary theory and the dual quantum field theory is a deformation of a CFT by such operators. We compute the power spectra of adiabatic and entropy perturbations in a simple model and find that the adiabatic curvature perturbation is not conserved in the presence of entropy perturbations but becomes conserved when the entropy perturbations are set to zero or the model is effectively a single scalar model, in agreement with expectations from cosmological perturbation theory.

  2. Mobile Computing and Ubiquitous Networking: Concepts, Technologies and Challenges.

    ERIC Educational Resources Information Center

    Pierre, Samuel

    2001-01-01

    Analyzes concepts, technologies and challenges related to mobile computing and networking. Defines basic concepts of cellular systems. Describes the evolution of wireless technologies that constitute the foundations of mobile computing and ubiquitous networking. Presents characterization and issues of mobile computing. Analyzes economical and…

  3. Computer Utilization in Industrial Arts/Technology Education. Curriculum Guide.

    ERIC Educational Resources Information Center

    Connecticut Industrial Arts Association.

    This guide is intended to assist industrial arts/technology education teachers in helping students in grades K-12 understand the impact of computers and computer technology in the world. Discussed in the introductory sections are the ways in which computers have changed the face of business, industry, and education and training; the scope and…

  4. Michigan Technological University Department of Computer Science

    E-print Network

    computing, distributed systems, embedded and multimedia systems, graphics & visualization, human computer.S. and Ph.D. students. Faculty research interests include architecture, artificial intelligence, cloud

  5. Atomic resolution holography.

    PubMed

    Hayashi, Kouichi

    2014-11-01

    Atomic resolution holography, such as X-ray fluorescence holography (XFH)[1] and photoelectron holography (PH), has the attention of researcher as an informative local structure analysis, because it provides three dimensional atomic images around specific elements within a range of a few nanometers. It can determine atomic arrangements around a specific element without any prior knowledge of structures. It is considered that the atomic resolution holographic is a third method of structural analysis at the atomic level after X-ray diffraction (XRD) and X-ray absorption fine structure (XAFS). As known by many researchers, XRD and XAFS are established methods that are widespread use in various fields. XRD and XAFS provide information on long-range translational periodicities and very local environments, respectively, whereas the atomic resolution holography gives 3D information on the local order and can visualize surrounding atoms with a large range of coordination shells. We call this feature "3D medium-range local structure observation".In addition to this feature, the atomic resolution holography is very sensitive to the displacement of atoms from their ideal positions, and one can obtain quantitative information about local lattice distortions by analyzing reconstructed atomic images[2] When dopants with different atomic radii from the matrix elements are present, the lattices around the dopants are distorted. However, using the conventional methods of structural analysis, one cannot determine the extent to which the local lattice distortions are preserved from the dopants. XFH is a good tool for solving this problem.Figure 1 shows a recent achievement on a relaxor ferroelectric of Pb(Mg1/3Nb2/3)O3 (PMN) using XFH. The structural studies of relaxor ferroelectrics have been carried out by X-ray or neutron diffractions, which suggested rhombohedral distortions of their lattices. However, their true pictures have not been obtained, yet. The Nb K? holograms showed four separate Pb images, as shown in Fig.1. Using these images, we could obtain acute and obtuse rhombohedral structures of the crystal unit cells. Moreover, the Pb-Pb correlated images reconstructed from Pb L? holograms showed a local structure of body center-like 2a0 ×2a0 × 2a0 superlattice, proving a rigid 3D network structural model combining the two kinds of rhombohedrons. This superstructure are believed to play an important role in the relaxor behaviour of PMN at atomic level[3].jmicro;63/suppl_1/i13/DFU047F1F1DFU047F1Fig. 1.3D images of the nearest Pb and O atoms around Nb in Pb(Mg1/3Nb2/3)O3. The cube represents 1/8 of the unit cell. PMID:25359802

  6. Computer Technology in Higher Education: An Experiment, Not a Solution

    Microsoft Academic Search

    Jan Rintala

    1998-01-01

    One of the major issues in higher education today is incorporating computer technology into our programs and delivery systems. As is often the case with science and technology, many people assume that technology should be incorporated, and they move right into implementation without asking whether the technology should be incorporated and, if so, under what conditions and for what purposes.

  7. Mathematical refocusing of images in electronic holography

    SciTech Connect

    Stetson, Karl A.

    2009-07-01

    This paper presents an illustration of mathematical refocusing of images obtained by the HoloFringe300K electronic holography program. The purpose is to demonstrate that this form of electronic holography is equivalent to image-plane, phase-stepped digital holography. The mathematical refocusing method used here differs from those in common use and may have some advantages.

  8. Trinidad Carnival : improving design through computation and digital technology

    E-print Network

    Noel, Vernelle A. A. (Vernelle Aletia)

    2013-01-01

    This thesis explores the integration of computation and digital technology to support design in the Trinidad Carnival. I argue that computation can contribute to design in the Trinidad Carnival by (1) addressing the dying ...

  9. The Steam Engine and the Computer: What Makes Technology Revolutionary.

    ERIC Educational Resources Information Center

    Simon, Herbert A.

    1987-01-01

    This discussion of technological revolution focuses on the computer and its uses in education. Contrasts between human traits, such as insight and creativity, and computer capabilities are discussed; the computer as its own instructional device is described; and possible educational changes resulting from computers are addressed. (LRW)

  10. Computational technology for high-temperature aerospace structures

    NASA Technical Reports Server (NTRS)

    Noor, A. K.; Card, M. F.

    1992-01-01

    The status and some recent developments of computational technology for high-temperature aerospace structures are summarized. Discussion focuses on a number of aspects including: goals of computational technology for high-temperature structures; computational material modeling; life prediction methodology; computational modeling of high-temperature composites; error estimation and adaptive improvement strategies; strategies for solution of fluid flow/thermal/structural problems; and probabilistic methods and stochastic modeling approaches, integrated analysis and design. Recent trends in high-performance computing environment are described and the research areas which have high potential for meeting future technological needs are identified.

  11. Attitudes to Technology, Perceived Computer Self-Efficacy and Computer Anxiety as Predictors of Computer Supported Education

    ERIC Educational Resources Information Center

    Celik, Vehbi; Yesilyurt, Etem

    2013-01-01

    There is a large body of research regarding computer supported education, perceptions of computer self-efficacy, computer anxiety and the technological attitudes of teachers and teacher candidates. However, no study has been conducted on the correlation between and effect of computer supported education, perceived computer self-efficacy, computer…

  12. Superconductivity, Superfluidity and Holography

    E-print Network

    Alberto Salvio

    2013-01-16

    This is a concise review of holographic superconductors and superfluids. We highlight some predictions of the holographic models and the emphasis is given to physical aspects rather than to the technical details, although some references to understand the latter are systematically provided. We include gapped systems in the discussion, motivated by the physics of high-temperature superconductivity. In order to do so we consider a compactified extra dimension (with radius R), or, alternatively, a dilatonic field. The first setup can also be used to model cylindrical superconductors; when these are probed by an axial magnetic field a universal property of holography emerges: while for large R (compared to the other scales in the problem) non-local operators are suppressed, leading to the so called Little-Parks periodicity, the opposite limit shows non-local effects, e.g. the uplifting of the Little-Parks periodicity. This difference corresponds in the gravity side to a Hawking-Page phase transition.

  13. Michigan Technological University Department of Computer Science

    E-print Network

    lecturers. Faculty research interests include architecture, artificial intelligence, compilers, distributed systems, embedded systems, graphics, hu- man computer interaction, machine learning, parallel computing

  14. Petascale Computing Enabling Technologies Project Final Report

    SciTech Connect

    de Supinski, B R

    2010-02-14

    The Petascale Computing Enabling Technologies (PCET) project addressed challenges arising from current trends in computer architecture that will lead to large-scale systems with many more nodes, each of which uses multicore chips. These factors will soon lead to systems that have over one million processors. Also, the use of multicore chips will lead to less memory and less memory bandwidth per core. We need fundamentally new algorithmic approaches to cope with these memory constraints and the huge number of processors. Further, correct, efficient code development is difficult even with the number of processors in current systems; more processors will only make it harder. The goal of PCET was to overcome these challenges by developing the computer science and mathematical underpinnings needed to realize the full potential of our future large-scale systems. Our research results will significantly increase the scientific output obtained from LLNL large-scale computing resources by improving application scientist productivity and system utilization. Our successes include scalable mathematical algorithms that adapt to these emerging architecture trends and through code correctness and performance methodologies that automate critical aspects of application development as well as the foundations for application-level fault tolerance techniques. PCET's scope encompassed several research thrusts in computer science and mathematics: code correctness and performance methodologies, scalable mathematics algorithms appropriate for multicore systems, and application-level fault tolerance techniques. Due to funding limitations, we focused primarily on the first three thrusts although our work also lays the foundation for the needed advances in fault tolerance. In the area of scalable mathematics algorithms, our preliminary work established that OpenMP performance of the AMG linear solver benchmark and important individual kernels on Atlas did not match the predictions of our simple initial model. Our investigations demonstrated that a poor default memory allocation mechanism degraded performance. We developed a prototype NUMA library to provide generic mechanisms to overcome these issues, resulting in significantly improved OpenMP performance. After additional testing, we will make this library available to all users, providing a simple means to improve threading on LLNL's production Linux platforms. We also made progress on developing new scalable algorithms that target multicore nodes. We designed and implemented a new AMG interpolation operator with improved convergence properties for very low complexity coarsening schemes. This implementation will also soon be available to LLNL's application teams as part of the hypre library. We presented results for both topics in an invited plenary talk entitled 'Efficient Sparse Linear Solvers for Multi-Core Architectures' at the 2009 HPCMP Institutes Annual Meeting/CREATE Annual All-Hands Meeting. The interpolation work was summarized in a talk entitled 'Improving Interpolation for Aggressive Coarsening' at the 14th Copper Mountain Conference on Multigrid Methods and in a research paper that will appear in Numerical Linear Algebra with Applications. In the area of code correctness, we significantly extended our behavior equivalence class identification mechanism. Specifically, we not only demonstrated it works well at very large scales but we also added the ability to classify MPI tasks not only by function call traces, but also by specific call sites (source code line numbers) being executed by tasks. More importantly, we developed a new technique to determine relative logical execution progress of tasks in the equivalence classes by combining static analysis with our original dynamic approach. We applied this technique to a correctness issue that arose at 4096 tasks during the development of the new AMG interpolation operator discussed above. This scale isat the limit of effectiveness of production tools, but our technique quickly located the erroneous source code, demonstrating the power of

  15. Internetics: Technologies, Applications and Academic Field or Parallel Computing and Computational Science Do Not Quite Work

    Microsoft Academic Search

    Geoffrey C. Fox

    Ten years ago, we were all sure that parallel computing technology and the interdisciplinary academic field of computational science would be center pieces of both academic and economic growth. We show that this insight was, in principle, correct but was an incomplete vision for large-scale computation implies both increased computer power and increasing numbers of users and applications. Parallel computing

  16. Strengthening Computer Technology Programs. Special Publication Series No. 49.

    ERIC Educational Resources Information Center

    McKinney, Floyd L., Comp.

    Three papers present examples of strategies used by developing institutions and historically black colleges to strengthen computer technology programs. "Promoting Industry Support in Developing a Computer Technology Program" (Albert D. Robinson) describes how the Washtenaw Community College (Ann Arbor, Michigan) Electrical/Electronics Department…

  17. Illinois Institute of Technology Electrical and Computer Engineering

    E-print Network

    Heller, Barbara

    Illinois Institute of Technology Electrical and Computer Engineering Department Chair Search The Illinois Institute of Technology (IIT) is seeking a distinguished scholar for Department Chair of the Electrical and Computer Engineering (ECE) Department (www.ece.iit.edu). IIT is a private research university

  18. The Impact of Computer Technology on the Family.

    ERIC Educational Resources Information Center

    Bailey, Anne Wiseman

    1982-01-01

    Computer technology as it affects home and family life is explored. Elements of this technology which are examined include electronic fund transfers (EFT), consumer rights and responsibilities relating to use of EFT, working at home via computer, housing design, costs of computerizing the home, and computerized aids for the handicapped. (CT)

  19. EINDHOVEN UNIVERSITY OF TECHNOLOGY Department of Mathematics and Computer Science

    E-print Network

    Eindhoven, Technische Universiteit

    EINDHOVEN UNIVERSITY OF TECHNOLOGY Department of Mathematics and Computer Science CASA-Report 12-33 October 2012 Index-aware model order reduction for index-2 differential-algebraic equations by G. Ali, N Department of Mathematics and Computer Science Eindhoven University of Technology P.O. Box 513 5600 MB

  20. Senior Nursing Students Comfort Levels with Computer Technology.

    ERIC Educational Resources Information Center

    Draude, Barbara J.; McKinney, Susan H.

    This paper describes the rationale for investigating the comfort levels in utilizing computer technology by senior level students in a baccalaureate nursing program. Students were surveyed before and after being exposed to various learning activities requiring interaction with computer technology. These structured learning activities included: use…

  1. Cloud Computing. Technology Briefing. Number 1

    ERIC Educational Resources Information Center

    Alberta Education, 2013

    2013-01-01

    Cloud computing is Internet-based computing in which shared resources, software and information are delivered as a service that computers or mobile devices can access on demand. Cloud computing is already used extensively in education. Free or low-cost cloud-based services are used daily by learners and educators to support learning, social…

  2. Roadmap: Applied Engineering Computer Engineering Technology -Bachelor of Science

    E-print Network

    Sheridan, Scott

    Roadmap: Applied Engineering ­ Computer Engineering Technology - Bachelor of Science [AT-BS-AENG-CET] College of Applied Engineering, Sustainability and Technology Catalog Year: 2012-2013 Page 1 of 2 | Last Electronic Communication 3 TECH 36620 Project Management in Engineering and Technology 3 Kent Core

  3. Roadmap: Radiologic Imaging Sciences -Computed Tomography (with AAS Radiologic Technology) -

    E-print Network

    Sheridan, Scott

    Roadmap: Radiologic Imaging Sciences - Computed Tomography (with AAS Radiologic Technology) - Bachelor of Radiologic and Imaging Sciences Technology [RE-BRIT-RIS-CTRT] Regional College Catalog Year Hours] Note: Students must have earned an AAS degree in Radiologic Technology (42 semester credits

  4. Roadmap: Radiologic Imaging Sciences -Computed Tomography (with AAS Radiologic Technology) -

    E-print Network

    Sheridan, Scott

    Roadmap: Radiologic Imaging Sciences - Computed Tomography (with AAS Radiologic Technology) - Bachelor of Radiologic and Imaging Sciences Technology [RE-BRIT-RIS-CTRT] Regional College Catalog Year Hours] Note: Students must have earned an AAS degree in Radiologic Technology (69-71 semester credits

  5. Some patterns of technological change in high-performance computers

    Microsoft Academic Search

    Jack Worlton

    1988-01-01

    High-performance computer technology is undergoing a period of unusually rapid change, and this paper attempts to describe the patterns of these changes in a systematic way. Pattern recognition is the basis of technology forecasting, and it is through technology forecasting that we obtain the anticipatory information that allows us to avoid problems and create opportunities. We will first identify the

  6. A perspective on technical needs in computational structures technology

    NASA Technical Reports Server (NTRS)

    Abdi, Frank F.; Savoni, Gregory L.; Newell, Kenneth J.

    1992-01-01

    The wide spectrum of needs and applications are demonstrated of computational structural mechanics. The spectrum ranges from micro structural mechanics to the optimization of the performance of aerovehicles. Critical high leveraged technologies will require engineering process modernization and automation, affordable structures and materials, and advanced computational technology. Recent advances at Rockwell International in computational structural mechanics addressed these issues and improve the ability to achieve advanced aircraft objectives.

  7. A perspective on technical needs in computational structures technology

    NASA Astrophysics Data System (ADS)

    Abdi, Frank F.; Savoni, Gregory L.; Newell, Kenneth J.

    1992-05-01

    The wide spectrum of needs and applications are demonstrated of computational structural mechanics. The spectrum ranges from micro structural mechanics to the optimization of the performance of aerovehicles. Critical high leveraged technologies will require engineering process modernization and automation, affordable structures and materials, and advanced computational technology. Recent advances at Rockwell International in computational structural mechanics addressed these issues and improve the ability to achieve advanced aircraft objectives.

  8. Document: P1337 Category: Computing Technologies, Hardware License Status: Available to License Texas Industry Cluster: Information and Computer Technology

    E-print Network

    Lightsey, Glenn

    Inventors Document: P1337 Category: Computing Technologies, Hardware License Status: Available to License Texas Industry Cluster: Information and Computer Technology Quantum dot applications for flash design using a protein-templated array of quantum dots reduces failure rates. When combined with a new

  9. CICT Computing, Information, and Communications Technology Program

    NASA Technical Reports Server (NTRS)

    Laufenberg, Lawrence; Tu, Eugene (Technical Monitor)

    2002-01-01

    The CICT Program is part of the NASA Aerospace Technology Enterprise's fundamental technology thrust to develop tools. processes, and technologies that enable new aerospace system capabilities and missions. The CICT Program's four key objectives are: Provide seamless access to NASA resources- including ground-, air-, and space-based distributed information technology resources-so that NASA scientists and engineers can more easily control missions, make new scientific discoveries, and design the next-generation space vehicles, provide high-data delivery from these assets directly to users for missions, develop goal-oriented human-centered systems, and research, develop and evaluate revolutionary technology.

  10. Computer Simulation Technology and Demonstration S. Schafrik & M. Karmis

    E-print Network

    Computer Simulation Technology and Demonstration S. Schafrik & M. Karmis Virginia Center for Coal constraints. A user- friendly visual simulation computer tool for the Windows environment is demonstrated INTRODUCTION Imitating the operations of real-life systems or proc- esses is the main purpose of computer

  11. Emerging Models and Technologies for Computation (EMT) Program Solicitation

    E-print Network

    Mazumder, Pinaki

    such as biological systems, quantum phenomena, nanoscale science and engineering, and other novel computing concepts. To bring fundamental changes to software, hardware and architectural design aspects of future computingEmerging Models and Technologies for Computation (EMT) Program Solicitation NSF 07-523 Replaces

  12. Math Attitudes of Computer Education and Instructional Technology Students

    ERIC Educational Resources Information Center

    Tekerek, Mehmet; Yeniterzi, Betul; Ercan, Orhan

    2011-01-01

    Computer Education and Instructional Technology (CEIT) Departments train computer teachers to fill gap of computer instructor in all grades of schools in Turkey. Additionally graduates can also work as instructional technologist or software developer. The curriculum of CEIT departments includes mathematics courses. The aim of this study is to…

  13. RAY ACOUSTICS USING COMPUTER GRAPHICS TECHNOLOGY

    Microsoft Academic Search

    Niklas Röber; Ulrich Kaminski; Maic Masuch

    2007-01-01

    The modeling of room acoustics and simulation of sound wave propagation remain a difficult and computationally expensive task. Two main techniques have evolved, with one focusing on a real physical - wave-oriented - sound propagation, while the other ap- proximates sound waves as rays using raytracing techniques. Due to many advances in computer science, and especially computer graphics over the

  14. Software technology for wireless mobile computing

    Microsoft Academic Search

    D. Duchamp; S.K. Feiner; G.Q.; Jr. Maguire

    1991-01-01

    Some of the possibilities and requirements for mobile computing on wireless local area networks {(LANs)} are discussed from the systems software viewpoint. The design of the Student Electronic Notebook {(SEN)} is sketched to provide a partial catalog of problems in building a real system for wireless mobile computing. This project was initiated to investigate the potential of wireless mobile computing

  15. Fulfilling the promise of the personal computer : the development of accessible computer technologies, 1970-1998

    E-print Network

    Petrick, Elizabeth

    2012-01-01

    of computer technology to alter human brains is not withouttechnology will also increasingly be integrated into the body and brain. “and brain operate using the same physical principles, allowing technology

  16. Holography, Entropy and Extra Dimensions

    E-print Network

    Deog Ki Hong; Stephen D. H. Hsu

    2004-04-30

    We show that higher dimensional models (brane worlds) in which the scale of quantum gravity $M_*$ is much smaller than the apparent scale $M_P \\sim 10^{19}$ GeV are in conflict with bounds arising from holography and black hole entropy. The thermodynamic entropy of astrophysical black holes and sub-horizon volumes during big bang nucleosynthesis exceed the relevant bounds unless $M_* > 10^{(4-6)}$ TeV, so a hierarchy relative to the weak scale is unavoidable. We discuss the implications for extra dimensions as well as holography.

  17. Higher Spin Holography

    NASA Astrophysics Data System (ADS)

    Chang, Chi-Ming

    This dissertation splits into two distinct halves. The first half is devoted to the study of the holography of higher spin gauge theory in AdS 3. We present a conjecture that the holographic dual of W N minimal model in a 't Hooft-like large N limit is an unusual "semi-local" higher spin gauge theory on AdS3 x 1. At each point on the S1 lives a copy of three-dimensional Vasiliev theory, that contains an infinite tower of higher spin gauge fields coupled to a single massive complex scalar propagating in AdS3. The Vasiliev theories at different points on the S1 are correlated only through the AdS3 boundary conditions on the massive scalars. All but one single tower of higher spin symmetries are broken by the boundary conditions. This conjecture is checked by comparing tree-level two- and three-point functions, and also one-loop partition functions on both side of the duality. The second half focuses on the holography of higher spin gauge theory in AdS 4. We demonstrate that a supersymmetric and parity violating version of Vasiliev's higher spin gauge theory in AdS4 admits boundary conditions that preserve N = 0,1,2,3,4 or 6 supersymmetries. In particular, we argue that the Vasiliev theory with U( M) Chan-Paton and N = 6 boundary condition is holographically dual to the 2+1 dimensional U(N) k x U(M) -k ABJ theory in the limit of large N, k and finite M. In this system all bulk higher spin fields transform in the adjoint of the U(M) gauge group, whose bulk t'Hooft coupling is M/N. Our picture suggests that the supersymmetric Vasiliev theory can be obtained as a limit of type IIA string theory in AdS4 x CP3, and that the non-Abelian Vasiliev theory at strong bulk 't Hooft coupling smoothly turn into a string field theory. The fundamental string is a singlet bound state of Vasiliev's higher spin particles held together by U(M) gauge interactions.

  18. The Future of Children: Children and Computer Technology

    NSDL National Science Digital Library

    The Future of Children is a publication of The Woodrow Wilson School of Public and International Affairs at Princeton University and The Brookings Institution. The purpose of the site is "to promote effective policies and programs for children" by providing information and research findings. Available from this website is the journal of Children and Computer Technology, which focuses on children's use of computer technology both in school and at home. The articles "summarize the knowledge and research available on how the use of computers affects children's development, whether it increases or decreases the disparities between rich and poor, and whether it can be used effectively to enhance learning." The site describes "promising examples of computer use" and offers recommendations to improve children's access to computers. Other sections include a review of Federal Programs to Increase Children's Access to Educational Technology, a survey on What Children Think About Computers, and a glossary which gives definitions for selected terms and acronyms.

  19. Cross-Country Technology Diffusion: The Case of Computers

    Microsoft Academic Search

    Francesco Caselli; Wilbur John Coleman II

    2001-01-01

    We use data on imports of computer equipment for a large sample of countries between 1 970 and 1990 to investigate the determinants of computer-technology adoption. We find strong evidence that computer adoption is associated with higher levels of human capital and with manufacturing trade openness vis-a-vis the OECD. We also find evidence that computer adoption is enhanced by high

  20. CLOUD COMPUTING TECHNOLOGIES PROGRAM An eleven-week in-depth program in the principles, methods, and technologies of Cloud Computing

    E-print Network

    Schaefer, Marcus

    CLOUD COMPUTING TECHNOLOGIES PROGRAM An eleven-week in-depth program in the principles, methods, and technologies of Cloud Computing DePaul University's Cloud Computing Technologies Program provides a broad understanding of the different leading Cloud Computing technologies. The program is designed to quickly educate

  1. Ageing, Learning, and Computer Technology in Australia

    ERIC Educational Resources Information Center

    Boulton-Lewis, Gillian M.; Buys, Laurie; Lovie-Kitchin, Jan; Barnett, Karen; David, L. Nikki

    2007-01-01

    Learning is an important aspect of active ageing, yet older people are not often included in discussions of the issue. Older people vary in their need, desire, and ability to learn, and this is evident in the context of technology. The focus of the data analysis for this paper was on determining the place of learning and technology in active…

  2. Zero Sound from Holography

    E-print Network

    A. Karch; D. T. Son; A. O. Starinets

    2008-06-24

    Quantum liquids are characterized by the distinctive properties such as the low temperature behavior of heat capacity and the spectrum of low-energy quasiparticle excitations. In particular, at low temperature, Fermi liquids exhibit the zero sound, predicted by L. D. Landau in 1957 and subsequently observed in liquid He-3. In this paper, we ask a question whether such a characteristic behavior is present in theories with holographically dual description. We consider a class of gauge theories with fundamental matter fields whose holographic dual in the appropriate limit is given in terms of the Dirac-Born-Infeld action in AdS_{p+1} space. An example of such a system is the N=4 SU(N_c) supersymmetric Yang-Mills theory with N_f massless N=2 hypermultiplets at strong coupling, finite baryon number density, and low temperature. We find that these systems exhibit a zero sound mode despite having a non-Fermi liquid type behavior of the specific heat. These properties suggest that holography identifies a new type of quantum liquids.

  3. Ultra-realistic imaging: a new beginning for display holography

    NASA Astrophysics Data System (ADS)

    Bjelkhagen, Hans I.; Brotherton-Ratcliffe, David

    2014-02-01

    Recent improvements in key foundation technologies are set to potentially transform the field of Display Holography. In particular new recording systems, based on recent DPSS and semiconductor lasers combined with novel recording materials and processing, have now demonstrated full-color analogue holograms of both lower noise and higher spectral accuracy. Progress in illumination technology is leading to a further major reduction in display noise and to a significant increase of the clear image depth and brightness of such holograms. So too, recent progress in 1-step Direct-Write Digital Holography (DWDH) now opens the way to the creation of High Virtual Volume Displays (HVV) - large format full-parallax DWDH reflection holograms having fundamentally larger clear image depths. In a certain fashion HVV displays can be thought of as providing a high quality full-color digital equivalent to the large-format laser-illuminated transmission holograms of the sixties and seventies. Back then, the advent of such holograms led to much optimism for display holography in the market. However, problems with laser illumination, their monochromatic analogue nature and image noise are well cited as being responsible for their failure in reality. Is there reason for believing that the latest technology improvements will make the mark this time around? This paper argues that indeed there is.

  4. Embedded Data Processor and Portable Computer Technology testbeds

    NASA Technical Reports Server (NTRS)

    Alena, Richard; Liu, Yuan-Kwei; Goforth, Andre; Fernquist, Alan R.

    1993-01-01

    Attention is given to current activities in the Embedded Data Processor and Portable Computer Technology testbed configurations that are part of the Advanced Data Systems Architectures Testbed at the Information Sciences Division at NASA Ames Research Center. The Embedded Data Processor Testbed evaluates advanced microprocessors for potential use in mission and payload applications within the Space Station Freedom Program. The Portable Computer Technology (PCT) Testbed integrates and demonstrates advanced portable computing devices and data system architectures. The PCT Testbed uses both commercial and custom-developed devices to demonstrate the feasibility of functional expansion and networking for portable computers in flight missions.

  5. Cutting Technology Costs with Refurbished Computers

    ERIC Educational Resources Information Center

    Dessoff, Alan

    2010-01-01

    Many district administrators are finding that they can save money on computers by buying preowned ones instead of new ones. The practice has other benefits as well: It allows districts to give more computers to more students who need them, and it also promotes good environmental practices by keeping the machines out of landfills, where they…

  6. Computers and Autistic Learners: An Evolving Technology.

    ERIC Educational Resources Information Center

    Hedbring, Charles

    1985-01-01

    A research and demonstration computer center for severely handicapped autistic children, STEPPE-Lab, which uses computers as an augmentative communication and instructional system, is described. The article first reviews the keyboard, joystick, mouse, and drawing tablet as augmentative devices for helping communication disordered children interact…

  7. Office of Information Technology Newark Computing Services

    E-print Network

    Hanson, Stephen José

    to Windows 7 or 8.1 by April 8th. If your computer hardware meets the minimum requirements, it is recommended and is also available for personally owned computers at a nominal price. Want to upgrade to Windows 8.1? To review the Windows 8.1 systems requirements, please visit http://windows.microsoft.com/en-us/windows-8

  8. Rainbow holography and its applications

    NASA Astrophysics Data System (ADS)

    Vlasov, N. G.; Ivanov, Vladimir S.

    1993-09-01

    The general equations of the rainbow holography are deduced. Their analysis makes it possible to offer different methods of the rainbow holographic images production. A new way of using the rainbow holograms as optical elements for effective color illuminating of transparent, specular, and polished objects is proposed. Application fields are the advertising industry, shop windows design, etc.

  9. Wormholes and entanglement in holography

    NASA Astrophysics Data System (ADS)

    Jensen, Kristan; Sonner, Julian

    2014-07-01

    In this paper, we consider highly entangled states in theories with a gravity dual, where the entangled degrees of freedom are causally disconnected from each other. Using the basic rules of holography, we argue that there is a nontraversable wormhole in the gravity dual whose geometry encodes the pattern of the entanglement.

  10. Olivier Dufour Computer technologies to better understanding ecosystem

    E-print Network

    Chamroukhi, Faicel

    Olivier Dufour Computer technologies to better understanding ecosystem birth date: 06, FRANCE olivierlouis.dufour@gmail.com webpage: http of terrestrial biodiversity ref : http://glotin.univ-tln.fr/ Southern University, Var, France 2011 Ecological

  11. Using Computer Technology To Foster Learning for Understanding.

    ERIC Educational Resources Information Center

    Van Melle, Elaine; Tomalty, Lewis

    2000-01-01

    Describes how computer technology, specifically the use of a multimedia CD-ROM, was integrated into a microbiology curriculum as part of the transition from focusing on facts to fostering learning for understanding. (Contains 30 references.) (Author/YDS)

  12. Theories of Learning and Computer-Mediated Instructional Technologies.

    ERIC Educational Resources Information Center

    Hung, David

    2001-01-01

    Describes four major models of learning: behaviorism, cognitivism, constructivism, and social constructivism. Discusses situated cognition; differences between learning theories and instructional approaches; and how computer-mediated technologies can be integrated with learning theories. (LRW)

  13. On the use of computation optimization opportunities in computer technologies for applied and computational mathematics problems with prescribed quality characteristics

    NASA Astrophysics Data System (ADS)

    Babich, M. D.; Zadiraka, V. K.; Lyudvichenko, V. A.; Sergienko, I. V.

    2010-12-01

    The use of various opportunities for computation optimization in computer technologies for applied and computational mathematics problems with prescribed quality characteristics is investigated. More precisely, the choice and determination of computational resources and methods of their efficient use for finding an approximate solution of problems up to prescribed accuracy in a limited amount of processor time are investigated.

  14. Reviews of computing technology: Software overview

    SciTech Connect

    Hartshorn, W.R.; Johnson, A.L.

    1994-01-05

    The Savannah River Site Computing Architecture states that the site computing environment will be standards-based, data-driven, and workstation-oriented. Larger server systems deliver needed information to users in a client-server relationship. Goals of the Architecture include utilizing computing resources effectively, maintaining a high level of data integrity, developing a robust infrastructure, and storing data in such a way as to promote accessibility and usability. This document describes the current storage environment at Savannah River Site (SRS) and presents some of the problems that will be faced and strategies that are planned over the next few years.

  15. Faculty of Computing and Information Technology Department of Robotics and Digital Technology

    E-print Network

    Breen, Jim

    Faculty of Computing and Information Technology Department of Robotics and Digital Technology Technical Report 93/13 A Japanese Electronic Dictionary Project (Part 1: The Dictionary Files) J. W. Breen November 30, 1993 Enquiries:­ Technical Report Coordinator Robotics and Digital Technology Monash

  16. Roadmap: Computer Technology Internet and Multimedia Technology Associate of Applied Business

    E-print Network

    Sheridan, Scott

    Roadmap: Computer Technology ­ Internet and Multimedia Technology ­ Associate of Applied Business or COMT 11004 Survey of Information Technology or COMT 21007 Internet Ethics and Policies 3 MATH 11009 21007 Internet Ethics and Policies or COMT 21036 Web Scripting I 3 Business Electives I 3-4 See note 1

  17. 25 CFR 502.7 - Electronic, computer or other technologic aid.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 2012-04-01 false Electronic, computer or other technologic aid. 502.7...THIS CHAPTER § 502.7 Electronic, computer or other technologic aid. (a) Electronic, computer or other technologic aid means any...

  18. 25 CFR 502.7 - Electronic, computer or other technologic aid.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 2014-04-01 false Electronic, computer or other technologic aid. 502.7...THIS CHAPTER § 502.7 Electronic, computer or other technologic aid. (a) Electronic, computer or other technologic aid means any...

  19. 25 CFR 502.7 - Electronic, computer or other technologic aid.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 2013-04-01 false Electronic, computer or other technologic aid. 502.7...THIS CHAPTER § 502.7 Electronic, computer or other technologic aid. (a) Electronic, computer or other technologic aid means any...

  20. Restricted access processor - An application of computer security technology

    NASA Technical Reports Server (NTRS)

    Mcmahon, E. M.

    1985-01-01

    This paper describes a security guard device that is currently being developed by Computer Sciences Corporation (CSC). The methods used to provide assurance that the system meets its security requirements include the system architecture, a system security evaluation, and the application of formal and informal verification techniques. The combination of state-of-the-art technology and the incorporation of new verification procedures results in a demonstration of the feasibility of computer security technology for operational applications.

  1. Full custom VLSI - A technology for high performance computing

    NASA Technical Reports Server (NTRS)

    Maki, Gary K.; Whitaker, Sterling R.

    1990-01-01

    Full custom VLSI is presented as a viable technology for addressing the need for the computing capabilities required for the real-time health monitoring of spacecraft systems. This technology presents solutions that cannot be realized with stored program computers or semicustom VLSI; also, it is not dependent on current IC processes. It is argued that, while design time is longer, full custom VLSI produces the fastest and densest VLSI solution and that high density normally also yields low manufacturing costs.

  2. Wearable computer technology for dismounted applications

    NASA Astrophysics Data System (ADS)

    Daniels, Reginald

    2010-04-01

    Small computing devices which rival the compact size of traditional personal digital assistants (PDA) have recently established a market niche. These computing devices are small enough to be considered unobtrusive for humans to wear. The computing devices are also powerful enough to run full multi-tasking general purpose operating systems. This paper will explore the wearable computer information system for dismounted applications recently fielded for ground-based US Air Force use. The environments that the information systems are used in will be reviewed, as well as a description of the net-centric, ground-based warrior. The paper will conclude with a discussion regarding the importance of intuitive, usable, and unobtrusive operator interfaces for dismounted operators.

  3. Emerging Trends in Technology Education Computer Applications.

    ERIC Educational Resources Information Center

    Hazari, Sunil I.

    1993-01-01

    Graphical User Interface (GUI)--and its variant, pen computing--is rapidly replacing older types of operating environments. Despite its heavier demand for processing power, GUI has many advantages. (SK)

  4. Remote metrology by comparative digital holography

    SciTech Connect

    Baumbach, Torsten; Osten, Wolfgang; Kopylow, Christoph von; Jueptner, Werner

    2006-02-10

    A method for the remote comparison of objects with regard to their shape or response to a load is presented. The method allows interferometric sensitivity for comparing objects with different microstructure. In contrast to the well-known incoherent techniques based on inverse fringe projection this new approach uses the coherent optical wave field of the master object as a mask for the illumination of the sample object. The coherent mask is created by digital holography to allow instant access to the complete optical information of the master object at any place desired. The mask is reconstructed by a spatial light modulator (SLM). The optical reconstruction of digital holograms with SLM technology allows modification of reconstructed wavefronts with respect to improvement of image quality, the skilled introduction of additional information about the object (augmented reality), and the alignment of the master and test object.

  5. Factors Influencing Cloud-Computing Technology Adoption in Developing Countries

    ERIC Educational Resources Information Center

    Hailu, Alemayehu

    2012-01-01

    Adoption of new technology has complicating components both from the selection, as well as decision-making criteria and process. Although new technology such as cloud computing provides great benefits especially to the developing countries, it has challenges that may complicate the selection decision and subsequent adoption process. This study…

  6. Synthesis of regular computational fabrics with ambipolar CNTFET technology

    E-print Network

    De Micheli, Giovanni

    Synthesis of regular computational fabrics with ambipolar CNTFET technology Michele De Marchi.demarchi, shashikanth.bobba, giovanni.demicheli}@epfl.ch CEA-LETI-MINATEC, 17, Rue des Martyrs, F-38054 Grenoble, France-field controllable polarities are evaluated. We designed regular layouts using these cells using 32nm technology

  7. The Future of Mobile Technology and Mobile Wireless Computing

    ERIC Educational Resources Information Center

    Hart, Jim; Hannan, Mike

    2004-01-01

    It is often stated that mobile wireless computing is going to be the next big technology revolution that will grip the world in the same way mobile telephones did in the 1990s. However, while the technology is rapidly improving, the rate of uptake has been lower than expected. This paper describes some of the reasons for this, and discusses some…

  8. Visual Impairments. Tech Use Guide: Using Computer Technology.

    ERIC Educational Resources Information Center

    Carr, Annette

    This guide describes adaptive technology for reading printed text and producing written material, to assist the student who has a visual impairment. The special technologies discussed include auditory text access, text enlargement, tactile text access, portable notetaking devices, and computer access. The guide concludes with lists of the…

  9. Beyond Computation: Information Technology, Organizational Transformation and Business Performance

    Microsoft Academic Search

    Lorin M. Hitt

    1995-01-01

    To understand the economic value of computers, one must broaden the definition of both the technology and its impacts. Successful uses of information technology involve substantial changes in business strategy and structure, worker skills, and products and services delivered. Therefore many of the costs and benefits are likely to be severely mismeasured in data based on industry- or economy-wide aggregates.

  10. Beyond Computer Literacy: Supporting Youth's Positive Development through Technology

    ERIC Educational Resources Information Center

    Bers, Marina Umaschi

    2010-01-01

    In a digital era in which technology plays a role in most aspects of a child's life, having the competence and confidence to use computers might be a necessary step, but not a goal in itself. Developing character traits that will serve children to use technology in a safe way to communicate and connect with others, and providing opportunities for…

  11. Information Systems and Technology University of California, Berkeley BERKELEY COMPUTING

    E-print Network

    California at Berkeley, University of

    Information Systems and Technology University of California, Berkeley BERKELEY COMPUTING filtering--8 Melvyl-T--8 CourseWeb strategy--10 E-waste--12 Continued on page 3 IST­CCS Director Shel and Communications Information Systems and Technology Summer 2003 / Volume 13, Number 3 University of California

  12. Roadmap: Applied Engineering Computer Engineering Technology -Bachelor of Science

    E-print Network

    Khan, Javed I.

    -BS-AENG-CET] College of Applied Engineering, Sustainability and Technology Catalog Year: 2013-2014 Page 1 of 2 | Last Year: 2013-2014 Page 2 of 2 | Last Updated: 13-May-13/JS Critical requirements are boldface in shadedRoadmap: Applied Engineering ­ Computer Engineering Technology - Bachelor of Science [AT

  13. Exploring Computer Technology. The Illinois Plan for Industrial Education.

    ERIC Educational Resources Information Center

    Illinois State Univ., Normal.

    This guide, which is one in the "Exploration" series of curriculum guides intended to assist junior high and middle school industrial educators in helping their students explore diverse industrial situations and technologies used in industry, deals with exploring computer technology. The following topics are covered in the individual lessons: the…

  14. EINDHOVEN UNIVERSITY OF TECHNOLOGY Department of Mathematics and Computer Science

    E-print Network

    Eindhoven, Technische Universiteit

    EINDHOVEN UNIVERSITY OF TECHNOLOGY Department of Mathematics and Computer Science CASA-Report 14-10 April 2014 Implicit-IMOR method for index-1 and index-2 linear constant DAEs by N. Banagaaya, G. Ali, W Science Eindhoven University of Technology P.O. Box 513 5600 MB Eindhoven, The Netherlands ISSN: 0926

  15. Video and Computer Technologies for Extended-Campus Programming.

    ERIC Educational Resources Information Center

    Sagan, Edgar L.; And Others

    This paper discusses video and computer technologies for extended-campus programming (courses and programs at off-campus sites). The first section provides an overview of the distance education program at the University of Kentucky (UK), and highlights the improved access to graduate and professional programs, advances in technology, funding,…

  16. Single-shot phase-shifting digital holography

    NASA Astrophysics Data System (ADS)

    Zhang, Jing; Xie, Yu; Li, Guifang; Ye, Yutang; Saleh, Bahaa E. A.

    2014-11-01

    We propose a digital holographic imaging system that is capable of recording/measuring the amplitude and phase of an optical wavefront in a single shot. Based on the principle of digital holography (DH), the proposed system uses a reference beam to interfere with the light field under investigation and digitally records/measures the in-phase and quadrature interference patterns. Single-shot in-phase and quadrature interference pattern recording is made possible by incorporating the technologies widely used in coherent optical communication. Specifically, a free-space optical 90-deg hybrid is employed to measure the complex (real and imaginary) optical field. We have constructed a single-shot phase-shifting digital holography system and experimentally demonstrated its operation.

  17. Gordon and Mike's ICT Podcast: Cloud Computing Technologies

    NSDL National Science Digital Library

    2011-06-30

    Gordon and Mike's ICT Podcast offers perspectives on the information and communication technologies (ICT) industries from Gordon Snyder and Mike Qaissaunee. In this podcast, cloud computing technologies are discussed. Eleven different related technologies are discussed, including software, security and databases. The running time for this show is 23:26.This podcast is available for direct download in mp3 format from the Libsyn site, or click here to subscribe to the whole series in iTunes.

  18. Direct-to-digital holography and holovision

    DOEpatents

    Thomas, Clarence E. (Knoxville, TN); Baylor, Larry R. (Knoxville, TN); Hanson, Gregory R. (Clinton, TN); Rasmussen, David A. (Knoxville, TN); Voelkl, Edgar (Oak Ridge, TN); Castracane, James (Albany, NY); Simkulet, Michelle (Latham, NY); Clow, Lawrence (Waterford, NY)

    2000-01-01

    Systems and methods for direct-to-digital holography are described. An apparatus includes a laser; a beamsplitter optically coupled to the laser; a reference beam mirror optically coupled to the beamsplitter; an object optically coupled to the beamsplitter, a focusing lens optically coupled to both the reference beam mirror and the object; and a digital recorder optically coupled to the focusing lens. A reference beam is incident upon the reference beam mirror at a non-normal angle, and the reference beam and an object beam are focused by the focusing lens at a focal plane of the digital recorder to form an image. The systems and methods provide advantages in that computer assisted holographic measurements can be made.

  19. Holography of 3D Flat Cosmological Horizons

    NASA Astrophysics Data System (ADS)

    Bagchi, Arjun; Detournay, Stéphane; Fareghbal, Reza; Simón, Joan

    2013-04-01

    We provide a first derivation of the Bekenstein-Hawking entropy of 3D flat cosmological horizons in terms of the counting of states in a dual field theory. These horizons appear in the flat limit of nonextremal rotating Banados-Teitleboim-Zanelli black holes and are remnants of the inner horizons. They also satisfy the first law of thermodynamics. We study flat holography as a limit of AdS3/CFT2 to semiclassically compute the density of states in the dual theory, which is given by a contraction of a 2D conformal field theory, exactly reproducing the bulk entropy in the limit of large charges. We comment on how the dual theory reproduces the bulk first law and how cosmological bulk excitations are matched with boundary quantum numbers.

  20. Institute for Computer Sciences and Technology. Annual Report FY 1986.

    ERIC Educational Resources Information Center

    National Bureau of Standards (DOC), Washington, DC. Inst. for Computer Sciences and Technology.

    Activities of the Institute for Computer Sciences and Technology (ICST) within the U.S. Department of Commerce during fiscal year 1986 are described in this annual report, which summarizes research and publications by ICST in the following areas: (1) standards and guidelines for computer security, including encryption and message authentication…

  1. Technological and Research Perspectives of Old-Age Ubiquitous Computing

    Microsoft Academic Search

    Antonio Krüger; Albrecht Schmidt; Jörg Müller

    2010-01-01

    Technological advances allow networked and context-aware computer systems to be integrated into devices, environments, everyday objects, and garments. The idea is that such smart environments and artifacts are able to perceive the users’ context and activity, anticipate their needs, and act to provide proactive support. Old-age ubiquitous computing has the potential to increase the length of time that both individuals

  2. "Computer" and "Information and Communication Technology": Students' Culture Specific Interpretations

    ERIC Educational Resources Information Center

    Elen, Jan; Clarebout, Geraldine; Sarfo, Frederick Kwaku; Louw, Lambertus Philippus; Poysa-Tarhonen, Johanna; Stassens, Nick

    2010-01-01

    Given the use of information and communication technology (ICT) and computer as synonyms in ICT-integration research on the one hand, and the potential problems in doing so on the other, this contribution tries to gain insight in the understanding of the words computer and ICT in different settings. In five different countries (Belgium, Finland,…

  3. Technion -Israel Institute of Technology Computer Science Department

    E-print Network

    Markovitch, Shaul

    Technion - Israel Institute of Technology Computer Science Department The M Algorithm Technion, Haifa 32000 Israel carmel@cs.technion.ac.il shaulm@cs.technion.ac.il Abstract While human players trying to face during the last ve decades is the creation of a computer program that can beat the world

  4. Computer-Integrated Manufacturing Technology. Tech Prep Competency Profile.

    ERIC Educational Resources Information Center

    Lakeland Tech Prep Consortium, Kirtland, OH.

    This tech prep competency profile for computer-integrated manufacturing technology begins with definitions for four occupations: manufacturing technician, quality technician, mechanical engineering technician, and computer-assisted design/drafting (CADD) technician. A chart lists competencies by unit and indicates whether entire or partial unit is…

  5. Selecting Software. Tech Use Guide: Using Computer Technology.

    ERIC Educational Resources Information Center

    Council for Exceptional Children, Reston, VA. Center for Special Education Technology.

    One of nine brief guides for special educators on using computer technology, this guide focuses on the selection of software for use in the special education classroom. Four types of software used for computer assisted instruction are briefly described: tutorials; drill and practice; educational games; and simulations. The increasing use of tool…

  6. Development of computer sign language translation technology for deaf people

    Microsoft Academic Search

    Mikhail G. Grif; Olga O. Korolkova; Yelena A. Demyanenko; Yevgeny B. Tsoy

    2011-01-01

    The paper considers computer sign language translation technology for deaf people. A detailed characteristic of the Russian text analysis stage, including prior semantic and semantic interpretation within the framework of developing a program for Russian text computer sign language translator into colloquial Russian sign language is given. Problems arising at this stage are also emphasized. Peculiarities of the Russian sign

  7. Computer-Mediated Technology and Transcultural Counselor Education.

    ERIC Educational Resources Information Center

    McFadden, John

    2000-01-01

    This manuscript traces the history of computer technologies, their applications in mental health settings, and suggests that transcultural counselor educators engage their students in the design of a case-based computer simulation. The avatar-focused simulation offers an unprecedented environment for experimentation in collaborative learning and…

  8. Atlantic Symposium on Computational Biology and Genome Information Systems & Technology

    E-print Network

    Wang, Xiong

    1 Atlantic Symposium on Computational Biology and Genome Information Systems & Technology Thursday A Lexical Approach to Text Mining for the Integration of Genomic Information Lauren Harrison and Peter Physical Mapping of Plant Genomes Carol Soderlund, Associate Professor, Dept. of Computer Science, Clemson

  9. Opportunities for Computing Technologies to Support Healthy Sleep Behaviors

    E-print Network

    Anderson, Richard

    Opportunities for Computing Technologies to Support Healthy Sleep Behaviors Eun Kyoung Choe1 and regular exercise. Human-computer interaction (HCI) researchers have recently designed systems to support diet and exercise, but sleep has been relatively under-studied in the HCI community. We conducted

  10. Computers for artificial intelligence a technology assessment and forecast

    SciTech Connect

    Miller, R.K.

    1986-01-01

    This study reviews the development and current state-of-the-art in computers for artificial intelligence, including LISP machines, AI workstations, professional and engineering workstations, minicomputers, mainframes, and supercomputers. Major computer systems for AI applications are reviewed. The use of personal computers for expert system development is discussed, and AI software for the IBM PC, Texas Instrument Professional Computer, and Apple MacIntosh is presented. Current research aimed at developing a new computer for artificial intelligence is described, and future technological developments are discussed.

  11. The impact and use of computer technology by the police

    Microsoft Academic Search

    Kent W. Colton; W. Colton

    1979-01-01

    Over the past decade there has been a significant growth in the use of computer technology by U.S. police departments. This growth, however, has been at a slower rate than predicted in the early 1970's. Further, when computer applications extend beyond “routine” uses to “nonroutine” efforts, such as resource allocation or computer-aided-dispatch systems where the machine begins to become a

  12. Folding time into space: novel approaches to integral holography

    NASA Astrophysics Data System (ADS)

    Vila, Doris K.

    1993-09-01

    This paper describes a novel computer technique for holography developed by the author called Speedograms. Using an existing 2-D animation program, this technique creates depth by moving different graphic elements at varying speeds over the screen. This method has the advantage of popular software and is the basis for development of an automated 2-D/3-D printer for photoresist. This paper also describes innovative applications of integral holography, including the skyline of Cologne. In addition, natural phenomena have also been recorded using multiple photographs from a stationary photo camera with the subjects moving horizontally. This way the continuous flow of water in the Rhine was recorded and a steady wind served as the track for a naturalistic hologram in clouds. The use of LCD video projection onto the holographic surface is shown with both recorded and real-time imagery. Future developments will expand on the projection system, with holograms, computer graphics, and real-time video combining in an approach to interactive multimedia holography.

  13. Electronic data collection using mobile computing technologies

    Microsoft Academic Search

    Rex van Olst; Barry Dwolatzky

    Research has been conducted on a large telecommunications utility to automate one of its important business processes of the utility, that of collecting information on its geographically dispersed network assets, using a Personal Digital Assistant (PDA) and wireless technologies. The results of the pilot implementation for this automated business process have been encouraging and indicate a means to improve the

  14. Using Computer Technology to Teach Thinking

    Microsoft Academic Search

    Jean Tower

    1996-01-01

    The successful reform of education in America will center on student learning and will bring together three seemingly separate agendas: student outcomes that reflect deep understanding and higher order thinking skills, curriculum that includes well-integrated uses of technology, and professional development for teachers that incorporates the two previously named agendas Each of these initiatives alone has potential to impact education

  15. Designing Appropriate Computing Technologies for Rural Development

    E-print Network

    Parikh, Tapan S.

    Government: services & programs: services & programs HealthHealth: informed, consistent care: informed, consistent and evaluating technologydeveloping and evaluating technology Build SolutionBuild Solution CAM: a mobile phone for small loansUse capital for small loans ­ Business, livestock, education, health care, etc

  16. Audit and Evaluation of Computer Security. Computer Science and Technology.

    ERIC Educational Resources Information Center

    Ruthberg, Zella G.

    This is a collection of consensus reports, each produced at a session of an invitational workshop sponsored by the National Bureau of Standards. The purpose of the workshop was to explore the state-of-the-art and define appropriate subjects for future research in the audit and evaluation of computer security. Leading experts in the audit and…

  17. Using Interactive Computer Technology to Enhance Learning

    ERIC Educational Resources Information Center

    Pemberton, Joy R.; Borrego, Joaquin, Jr.; Cohen, Lee M.

    2006-01-01

    We assessed the effects of using LearnStar[TM], an interactive, computer-based teaching tool, as an in-class exam review method. Students with higher LearnStar review scores had higher grades. Furthermore, students' satisfaction ratings indicated that LearnStar reviews were more enjoyable and conducive to participation than traditional reviews.…

  18. Cloud Computing Technologies Facilitate Earth Research

    NASA Technical Reports Server (NTRS)

    2015-01-01

    Under a Space Act Agreement, NASA partnered with Seattle-based Amazon Web Services to make the agency's climate and Earth science satellite data publicly available on the company's servers. Users can access the data for free, but they can also pay to use Amazon's computing services to analyze and visualize information using the same software available to NASA researchers.

  19. Gabrielle Allen Center for Computation & Technology

    E-print Network

    Allen, Gabrielle

    Hurricane RITAHurricane KATRINA Statistics #12;9 Hurricane tracks #12;10 Hurricane Tracks #12;11 #12) NSF DynaCode Urgent Computing for Hurricane Forecasts CNS-0540374 #12;2 #12;SURA Coastal Ocean Scenarios · Hurricane forecasts · Emergency preparedness · Oilspill behaviour · Sea rescue · Military

  20. CACTUS: Calculator and Computer Technology User Service.

    ERIC Educational Resources Information Center

    Hyde, Hartley

    1998-01-01

    Presents an activity in which students use computer-based spreadsheets to find out how much grain should be added to a chess board when a grain of rice is put on the first square, the amount is doubled for the next square, and the chess board is covered. (ASK)

  1. Establishment of the Center for Biomedical Technology Innovation

    SciTech Connect

    NONE

    2001-12-15

    The report discussed the following topics: (1) Orthopedic Devices; (2) Hybrid Vector and Method Resulting in Protein Overproduction by Eukaryotic Cells; (3) Surgical Simulator; (4) CBTI (Center for Biomedical Technology Innovation) as an Incubator for Start-up Companies; (5) Voice-activated, computer-assisted surgical robotics; (6) Through transmission ultrasonic 3-D holography for diagnostic imaging; (7) CBTI's Scibermed{trademark} Virtual Institute (SVI); and (8) Laser Oxygenation Tomography.

  2. Optimal noise suppression in Fresnel incoherent correlation holography (FINCH) configured for

    E-print Network

    Rosen, Joseph

    Optimal noise suppression in Fresnel incoherent correlation holography (FINCH) configured incoherent correlation holography (FINCH) system is proposed and analyzed. Experimental results holography (FINCH) is a relatively new method of digital holography for recording holograms under incoherent

  3. Network Computer Technology. Phase I: Viability and Promise within NASA's Desktop Computing Environment

    NASA Technical Reports Server (NTRS)

    Paluzzi, Peter; Miller, Rosalind; Kurihara, West; Eskey, Megan

    1998-01-01

    Over the past several months, major industry vendors have made a business case for the network computer as a win-win solution toward lowering total cost of ownership. This report provides results from Phase I of the Ames Research Center network computer evaluation project. It identifies factors to be considered for determining cost of ownership; further, it examines where, when, and how network computer technology might fit in NASA's desktop computing architecture.

  4. Energy and technology review

    SciTech Connect

    Poggio, A.J. (ed.)

    1988-10-01

    This issue of Energy and Technology Review contains: Neutron Penumbral Imaging of Laser-Fusion Targets--using our new penumbral-imaging diagnostic, we have obtained the first images that can be used to measure directly the deuterium-tritium burn region in laser-driven fusion targets; Computed Tomography for Nondestructive Evaluation--various computed tomography systems and computational techniques are used in nondestructive evaluation; Three-Dimensional Image Analysis for Studying Nuclear Chromatin Structure--we have developed an optic-electronic system for acquiring cross-sectional views of cell nuclei, and computer codes to analyze these images and reconstruct the three-dimensional structures they represent; Imaging in the Nuclear Test Program--advanced techniques produce images of unprecedented detail and resolution from Nevada Test Site data; and Computational X-Ray Holography--visible-light experiments and numerically simulated holograms test our ideas about an x-ray microscope for biological research.

  5. High-intensity x-ray holography: an approach to high-resolution snapshot imaging of biological specimens

    SciTech Connect

    Solem, J.C.

    1982-08-01

    The crucial physical and technological issues pertaining to the holographic imaging of biological structures with a short-pulse, high-intensity, high-quantum-energy laser were examined. The limitations of x-ray optics are discussed. Alternative holographic techniques were considered, and it was concluded that far-field Fresnel transform holography (Fraunhofer holography) using a photoresist recording surface is most tractable with near term technology. The hydrodynamic expansion of inhomogeneities within the specimen is discussed. It is shown that expansion is the major source of image blurring. Analytic expressions were derived for the explosion of protein concentrations in an x-ray transparent cytoplasm, compared with numerical calculations, and corrections derived to account for the competitive transport processes by which these inhomogeneities lose energy. It is concluded that for the near term Fresnel transform holography, particularly, far-field or Fraunhofer holography, is more practical than Fourier transform holography. Of the alternative fine grain recording media for use with Fresnel transform holography, a photo-resist is most attractive. For best resolution, exposure times must be limited to a few picoseconds, and this calls for investigation of mechanisms to shutter the laser or gate the recording surface. The best contrast ratio between the nitrogen-bearing polymers (protein and the nucleic acids) and water is between the K-edges of oxygen and nitrogen.

  6. Computational Fluid Dynamics Technology for Hypersonic Applications

    NASA Technical Reports Server (NTRS)

    Gnoffo, Peter A.

    2003-01-01

    Several current challenges in computational fluid dynamics and aerothermodynamics for hypersonic vehicle applications are discussed. Example simulations are presented from code validation and code benchmarking efforts to illustrate capabilities and limitations. Opportunities to advance the state-of-art in algorithms, grid generation and adaptation, and code validation are identified. Highlights of diverse efforts to address these challenges are then discussed. One such effort to re-engineer and synthesize the existing analysis capability in LAURA, VULCAN, and FUN3D will provide context for these discussions. The critical (and evolving) role of agile software engineering practice in the capability enhancement process is also noted.

  7. HOLONET: a network for training holography

    NASA Astrophysics Data System (ADS)

    Pombo, Pedro; Santos, Emanuel

    2014-07-01

    Holography is an optics technique based on wave physics and lasers with several applications at our day life. The production of holograms involves experimental work based on hands-on activities and creativity. All these elements can contribute to the promotion of experimental teaching of optics and training on holography. The hologram itself acting as a final result from a long process of research and study can enable the engagement of high school students on physics and promote the stimulus on optics learning. Taking these assumptions into account a network of schools working on holography was built involving thirty schools from all country. Holography systems were developed and several hands-on activities were constructed. During last sixteen years students are working on laser optics and holography producing different kinds of holograms. This study presents all holography labs implemented at schools and it will analyzed the holography systems and materials developed for students. Training strategy will be discussed and holograms obtained by students will be presented. Results obtained show us that holography can be implemented as a strategy for promoting the learning of optics and it is a particular way to involve students on experimental work and lab research. Results obtained during this study will be presented in detail and analyzed with focus on students performance. Educational results, teachers training, prizes and other positive outcomes will be discussed and compared.

  8. Managing and directing innovation in the holography business

    NASA Astrophysics Data System (ADS)

    Gortych, Joseph E.; Abilock, Harold

    2006-02-01

    The intellectual property (IP) space associated with core high-tech innovations, such as holography, tends to rapidly expand in many directions as new applications and improvements to the core technology are realized. Patents soon start to quickly fill regions of the IP space to varying densities, often before any commercial product is available. Complicating matters is the fact that the patents typically range wildly in quality and business value for a host of reasons, not the least of which is that many high-tech companies lack an IP strategy designed to drive their R and D and patenting efforts. IP-savvy high-tech companies are relying more and more on some type of IP space analysis to more fully understand the IP landscape in which they do business. However, after an IP space analysis is performed, it needs to be integrated into a larger IP management system driven by an IP strategy. This paper examines the role of a best-practice IP management system in a high-tech business and how it can be used in conjunction with a holography IP space analysis to strategically manage and direct innovation in the holography business.

  9. Schrödinger holography for z < 2

    NASA Astrophysics Data System (ADS)

    Andrade, Tomás; Keeler, Cynthia; Peach, Alex; Ross, Simon F.

    2015-02-01

    We investigate holography for asymptotically Schrödinger spacetimes, using a frame formalism. Our dictionary is based on the anisotropic scaling symmetry. We consider z < 2, where the holographic dictionary is cleaner; we make some comments on z = 2. We propose a definition of asymptotically locally Schrödinger spacetime where the leading components of the frame fields provide suitable geometric boundary data. We show that an asymptotic expansion exists for generic boundary data satisfying our boundary conditions for z < 2.

  10. Atom interferometers and atom holography

    SciTech Connect

    Shimizu, Fujio; Mitake, Satoru [Institute for Laser Science and CREST, University of Electro-Communications, Chofu-shi 182-8585 (Japan); Fujita, Jun-ichi [NEC Fundamental Research Laboratories, 34 Miyukigaoka, Tsukuba 305-0841 (Japan); Morinaga, Makoto [Department of Applied Physics, University of Tokyo, Bunkyo-ku, Tokyo 113 (Japan); Kishimoto, Tetsuo [Institute for Laser Science and CREST, University of Electro-Communications, Chofu-shi 182-8585 (Japan); Department of Applied Physics, University of Tokyo, Bunkyo-ku, Tokyo 113 (Japan)

    1999-06-11

    Various techniques of atom manipulation with a binary hologram are discussed and demonstrated experimentally. An atomic beam of metastable neon in the 1s{sub 3} state and a SiN thin film with holes that expresses the transmission function of the hologram are used to demonstrate this technique. The gray-scale holography of atoms is demonstrated for the first time. Other possibilities of holographic manipulation of atoms are also discussed.

  11. Schrodinger Holography for z<2

    E-print Network

    Tomas Andrade; Cynthia Keeler; Alex Peach; Simon F. Ross

    2014-11-19

    We investigate holography for asymptotically Schrodinger spacetimes, using a frame formalism. Our dictionary is based on the anisotropic scaling symmetry. We consider z <2, where the holographic dictionary is cleaner; we make some comments on z=2. We propose a definition of asymptotically locally Schrodinger spacetime where the leading components of the frame fields provide suitable geometric boundary data. We show that an asymptotic expansion exists for generic boundary data satisfying our boundary conditions for z<2.

  12. Technology-Enhanced Management Education: Conceptual Framework and Experiences with Advanced Telecom-Computer Integrated Technology

    Microsoft Academic Search

    Albert A. ANGEHRN; Thierry NABETH

    Education is one of the most relevant domains in which the integration of emerging computer and telecommunication technologies is enabling significant innovations. A prerequisite for this development are appropriate frameworks to guide education professionals in exploiting advanced information and communication technologies to significantly enhance the quality and efficiency of traditional management learning and training methods. This paper describes how such

  13. The Adoption of Grid Computing Technology by Organizations: A Quantitative Study Using Technology Acceptance Model

    ERIC Educational Resources Information Center

    Udoh, Emmanuel E.

    2010-01-01

    Advances in grid technology have enabled some organizations to harness enormous computational power on demand. However, the prediction of widespread adoption of the grid technology has not materialized despite the obvious grid advantages. This situation has encouraged intense efforts to close the research gap in the grid adoption process. In this…

  14. Roadmap: Computer Technology Internet and Multimedia Technology Associate of Applied Business

    E-print Network

    Khan, Javed I.

    and milestones designated as critical (in boldface and shaded areas) must be completed in the semester listedRoadmap: Computer Technology ­ Internet and Multimedia Technology ­ Associate of Applied Business to ensure a timely graduation. Kent Core Summary (visit www.kent.edu/catalog/kent-core for course list) Kent

  15. 3D Flat Holography: Entropy and Logarithmic Corrections

    E-print Network

    Bagchi, Arjun

    2014-01-01

    We compute the leading corrections to the Bekenstein-Hawking entropy of the Flat Space Cosmological (FSC) solutions in 3D flat spacetimes, which are the flat analogues of the BTZ black holes in AdS3. The analysis is done by a computation of density of states in the dual 2D Galilean Conformal Field Theory and the answer obtained by this matches with the limiting value of the expected result for the BTZ inner horizon entropy as well as what is expected for a generic thermodynamic system. Along the way, we also develop other aspects of holography of 3D flat spacetimes.

  16. 3D flat holography: entropy and logarithmic corrections

    NASA Astrophysics Data System (ADS)

    Bagchi, Arjun; Basu, Rudranil

    2014-03-01

    We compute the leading corrections to the Bekenstein-Hawking entropy of the Flat Space Cosmological (FSC) solutions in 3D flat spacetimes, which are the flat analogues of the BTZ black holes in AdS3. The analysis is done by a computation of density of states in the dual 2D Galilean Conformal Field Theory and the answer obtained by this matches with the limiting value of the expected result for the BTZ inner horizon entropy as well as what is expected for a generic thermodynamic system. Along the way, we also develop other aspects of holography of 3D flat spacetimes.

  17. Portable Computer Technology (PCT) Research and Development Program Phase 2

    NASA Technical Reports Server (NTRS)

    Castillo, Michael; McGuire, Kenyon; Sorgi, Alan

    1995-01-01

    The subject of this project report, focused on: (1) Design and development of two Advanced Portable Workstation 2 (APW 2) units. These units incorporate advanced technology features such as a low power Pentium processor, a high resolution color display, National Television Standards Committee (NTSC) video handling capabilities, a Personal Computer Memory Card International Association (PCMCIA) interface, and Small Computer System Interface (SCSI) and ethernet interfaces. (2) Use these units to integrate and demonstrate advanced wireless network and portable video capabilities. (3) Qualification of the APW 2 systems for use in specific experiments aboard the Mir Space Station. A major objective of the PCT Phase 2 program was to help guide future choices in computing platforms and techniques for meeting National Aeronautics and Space Administration (NASA) mission objectives. The focus being on the development of optimal configurations of computing hardware, software applications, and network technologies for use on NASA missions.

  18. Impact of new computing systems on computational mechanics and flight-vehicle structures technology

    NASA Technical Reports Server (NTRS)

    Noor, A. K.; Storaasli, O. O.; Fulton, R. E.

    1984-01-01

    Advances in computer technology which may have an impact on computational mechanics and flight vehicle structures technology were reviewed. The characteristics of supersystems, highly parallel systems, and small systems are summarized. The interrelations of numerical algorithms and software with parallel architectures are discussed. A scenario for future hardware/software environment and engineering analysis systems is presented. Research areas with potential for improving the effectiveness of analysis methods in the new environment are identified.

  19. Real-world applications for brain-computer interface technology

    Microsoft Academic Search

    Melody M. Moore

    2003-01-01

    The mission of the Georgia State University BrainLab is to create and adapt methods of human-computer interaction that will allow brain-computer interface (BCI) technologies to effectively control real-world applications. Most of the existing BCI applications were designed largely for training and demonstration purposes. Our goal is to research ways of transitioning BCI control skills learned in training to real-world scenarios.

  20. The implementation of AI technologies in computer wargames

    NASA Astrophysics Data System (ADS)

    Tiller, John A.

    2004-08-01

    Computer wargames involve the most in-depth analysis of general game theory. The enumerated turns of a game like chess are dwarfed by the exponentially larger possibilities of even a simple computer wargame. Implementing challenging AI is computer wargames is an important goal in both the commercial and military environments. In the commercial marketplace, customers demand a challenging AI opponent when they play a computer wargame and are frustrated by a lack of competence on the part of the AI. In the military environment, challenging AI opponents are important for several reasons. A challenging AI opponent will force the military professional to avoid routine or set-piece approaches to situations and cause them to think much deeper about military situations before taking action. A good AI opponent would also include national characteristics of the opponent being simulated, thus providing the military professional with even more of a challenge in planning and approach. Implementing current AI technologies in computer wargames is a technological challenge. The goal is to join the needs of AI in computer wargames with the solutions of current AI technologies. This talk will address several of those issues, possible solutions, and currently unsolved problems.

  1. Seeing differently... Optogenetics, holography, and vision restoration Lecturer: Inna Reutsky-Gefen

    E-print Network

    Rimon, Elon

    Seeing differently... Optogenetics, holography, and vision restoration Lecturer: Inna Reutsky of the impaired retina that utilizes a new approach recently introduced into neuroscience - Optogenetics. This new-electrode prosthesis. The optogenetic technology that was developed in our laboratory enables stimulation of neuronal

  2. Why Biomedical Computing? Computer-assisted medical imaging technology plays a cru-

    E-print Network

    Cengarle, María Victoria

    Why Biomedical Computing? Computer-assisted medical imaging technology plays a cru- cial role in modern clinical environments, as medical diag- nosis and treatment are increasingly supported by imaging understanding of medical problems in imaging, interventions and diagnosis. Many events take place

  3. Computer Technology Training for Prospective Teachers: Computer Attitudes and Perceived Self-Efficacy.

    ERIC Educational Resources Information Center

    Milbrath, Ying-Chen L.; Kinzie, Mable B.

    2000-01-01

    This longitudinal study conducted at the University of Virginia examined preservice teachers' changes in computer anxiety; perceived usefulness of computer technology; frequency of using word processing, email, spreadsheets, database management, statistical packages, and CD-ROM databases; and perceived self-efficacy. Discusses time effect and…

  4. Design of a fault tolerant airborne digital computer. Volume 2: Computational requirements and technology

    NASA Technical Reports Server (NTRS)

    Ratner, R. S.; Shapiro, E. B.; Zeidler, H. M.; Wahlstrom, S. E.; Clark, C. B.; Goldberg, J.

    1973-01-01

    This final report summarizes the work on the design of a fault tolerant digital computer for aircraft. Volume 2 is composed of two parts. Part 1 is concerned with the computational requirements associated with an advanced commercial aircraft. Part 2 reviews the technology that will be available for the implementation of the computer in the 1975-1985 period. With regard to the computation task 26 computations have been categorized according to computational load, memory requirements, criticality, permitted down-time, and the need to save data in order to effect a roll-back. The technology part stresses the impact of large scale integration (LSI) on the realization of logic and memory. Also considered was module interconnection possibilities so as to minimize fault propagation.

  5. Helicopter mission optimization study. [portable computer technology for flight optimization

    NASA Technical Reports Server (NTRS)

    Olson, J. R.

    1978-01-01

    The feasibility of using low-cost, portable computer technology to help a helicopter pilot optimize flight parameters to minimize fuel consumption and takeoff and landing noise was demonstrated. Eight separate computer programs were developed for use in the helicopter cockpit using a hand-held computer. The programs provide the helicopter pilot with the ability to calculate power required, minimum fuel consumption for both range and endurance, maximum speed and a minimum noise profile for both takeoff and landing. Each program is defined by a maximum of two magnetic cards. The helicopter pilot is required to key in the proper input parameter such as gross weight, outside air temperature or pressure altitude.

  6. Welcome to Computing at UNCG! Information Technology Services

    E-print Network

    Saidak, Filip

    in Jackson Library or the Technology Support Center located in 101 Forney Building. Ethical Use of Computing to copyright-protected materials regardless of whether they are reproduced in digital, electronic, print, or other form. Copyright ownership by members of the University community is addressed in the Copyright

  7. Computer Technology Human Labor and Long-Run Economic Growth

    Microsoft Academic Search

    Stuart W. Elliott; Ashish Arora; Harvey Brooks; Peter Cappelli; Hirsh Cohen; Richard Cyert; Richard Day; Amanda Ellsworth; Gary Fields; Jon Fincham; Robert Gibbons; Claudia Goldin; Mark Kamlet; Lawrence Katz; Rachel Kranton; Lester Lave; Frank Levy; Richard Murnane; Paul Osterman; Arnold Packer; Michael Piore; Paul Romer

    Abstract Over the coming century, computer technology is likely to become capable of reproducing many,of the skills now performed by human labor. This paper describes three models of the aggregate economic changes that occur when capital becomes,capable of performing human work skills. The basic model, with a single sector and homogeneous labor, pro- jects output growth rates over the next

  8. Adult Literacy, Computer Technology, and the Hearing Impaired.

    ERIC Educational Resources Information Center

    Askov, Eunice N.; And Others

    This paper looks at computer technology's current and potential role in developing literacy in hearing impaired (HI) adults. First, the paper considers findings of adult literacy research including the national impact of illiteracy, functional literacy, communication and thinking skills, the whole language approach, the process approach to…

  9. ISE 511L : COMPUTER-AIDED MANUFACTURING (ADVANCED MANUFACTURING TECHNOLOGY)

    E-print Network

    Bukkapatnam, Satish T.S.

    Matlab Demo Matlab tutorial Matlab links 2 Introduction to Computer-Aided On-Line Quality Control Machine @ KAP 134 CONTACT Satish Bukkapatnam Ext: 09549 Daniel J. Epstein Industrial and Systems Engineering. The focus will be on the modeling and sensing technologies for real-time control of manufacturing operations

  10. EINDHOVEN UNIVERSITY OF TECHNOLOGY Department of Mathematics and Computer Science

    E-print Network

    Eindhoven, Technische Universiteit

    carbonation reaction mechanism, namely CO2(g aq) + Ca(OH)2(s aq) CaCO3(aq s) + H2O. (1) In o and Applications Department of Mathematics and Computer Science Eindhoven University of Technology P.O. Box 513 Muntean December 19, 2011 Abstract We investigate the fast-reaction asymptotics for a one

  11. Beyond Computer Literacy: Technology Integration and Curriculum Transformation

    ERIC Educational Resources Information Center

    Safar, Ammar H.; AlKhezzi, Fahad A.

    2013-01-01

    Personal computers, the Internet, smartphones, and other forms of information and communication technology (ICT) have changed our world, our job, our personal lives, as well as how we manage our knowledge and time effectively and efficiently. Research findings in the past decades have acknowledged and affirmed that the content the ICT medium…

  12. The Intel Science and Technology Center for Cloud Computing

    E-print Network

    different types of devices, be it a notebook computer, smartphone, tablet, or others. Some examples include using online storage when sharing videos or photos, engaging in social networks, and using online Economics, Principled Technology, expert interviews, Bain analysis. Huge potential benefits Innovation

  13. ENVIRONMENTAL CONSEQUENCES OF TELEMATICS: TELECOMMUNICATION, COMPUTATION, AND INFORMATION TECHNOLOGIES

    EPA Science Inventory

    Current important research needs whose results will be critical to Environmental Protection Agency's mission in the next two to three decades with regard to a major expansion in the use of telematics, i.e. telecommunications, computer, and information technology, are identified. ...

  14. The pedagogy-technology interface in Computer Assisted Pronunciation Training

    Microsoft Academic Search

    Ambra Neri; Catia Cucchiarini; Helmer Strik; L. W. J. Boves

    2002-01-01

    In this paper, we examine the relationship between pedagogy and technology in Computer Assisted Pronunciation Training (CAPT) courseware. First, we will analyse available literature on second language pronunciation teaching and learning in order to derive some general guidelines for effective training. Second, we will present an appraisal of various CAPT systems with a view to establishing whether they meet pedagogical

  15. Information Systems and Technology University of California, Berkeley BERKELEY COMPUTING

    E-print Network

    California at Berkeley, University of

    Information Systems and Technology University of California, Berkeley BERKELEY COMPUTING & COMMUNICATIONS Volume 13, Number 1 Winter 2003 IN THIS ISSUE: Web-enabled PowerPoint--5 SAN bulk storage--9 i "Tele- BEARS phone system: Planning for retirement" in this issue.) Piracy and privacy: Critical network

  16. Charitable technologies: opportunities for collaborative computing in nonprofit fundraising

    Microsoft Academic Search

    Jeremy Goecks; Amy Voida; Stephen Voida; Elizabeth D. Mynatt

    2008-01-01

    This paper presents research analyzing the role of computational technology in the domain of nonprofit fundraising. Nonprofits are a cornerstone of many societies and are especially prominent in the United States, where $295 billion, or slightly more than 2% of the U.S. Gross Domestic Product (i.e. total national revenue), was directed toward charitable causes in 2006. Nonprofits afford many worthwhile

  17. Competitive Healthcare Delivery: Involving Medical Technology of Computer Intelligence

    Microsoft Academic Search

    Khong Poh Wah; Dhanjoo GHISTA

    2004-01-01

    Rising cost and increasing expectation from patients (consumers) have caused health care planners to seek ways in improving efficiency, while striking a balance with the quality of services offered. Consequently several successful health- management organizations apply advanced computer technology as the catalyst for a whole new set of parameters for product design, development and operation to achieve excellence in their

  18. DarmstadtUniversityofTechnology ComputerArchitectureGroup

    E-print Network

    Hoffmann, Rolf

    for a Cellular Automaton with Moving Creatures FB Informatik FG Rechnerarchitektur Mathias Halbach Rolf Hoffmann;DarmstadtUniversityofTechnology ComputerArchitectureGroup 2 Creatures and the Environment Challenge: Find the best behaviour of moving creatures automatically. Question in detail: n creatures are moving around

  19. Computer Software for Forestry Technology Curricula. Final Report.

    ERIC Educational Resources Information Center

    Watson, Roy C.; Scobie, Walter R.

    Since microcomputers are being used more and more frequently in the forest products industry in the Pacific Northwest, Green River Community College conducted a project to search for BASIC language computer programs pertaining to forestry, and when possible, to adapt such software for use in teaching forestry technology. The search for applicable…

  20. Computational Structures Technology for Airframes and Propulsion Systems

    NASA Technical Reports Server (NTRS)

    Noor, Ahmed K. (compiler); Housner, Jerrold M. (compiler); Starnes, James H., Jr. (compiler); Hopkins, Dale A. (compiler); Chamis, Christos C. (compiler)

    1992-01-01

    This conference publication contains the presentations and discussions from the joint University of Virginia (UVA)/NASA Workshops. The presentations included NASA Headquarters perspectives on High Speed Civil Transport (HSCT), goals and objectives of the UVA Center for Computational Structures Technology (CST), NASA and Air Force CST activities, CST activities for airframes and propulsion systems in industry, and CST activities at Sandia National Laboratory.

  1. Georgia Institute of Technology School of Electrical and Computer Engineering

    E-print Network

    Leach Jr.,W. Marshall

    Georgia Institute of Technology School of Electrical and Computer Engineering ECE 4435 Op Amp into pink noise would to be to drive the impedance with a current source. The Howland current pump. The textbook never mentions this very undesirable feature. The only current source circuit in the book which

  2. Georgia Institute of Technology School of Electrical and Computer Engineering

    E-print Network

    Leach Jr.,W. Marshall

    current source circuit in the book which will drive a grounded load that doesn't have the undesirableGeorgia Institute of Technology School of Electrical and Computer Engineering ECE 4435 Op Amp the desired impedance. One way to convert the white noise into pink noise would to be to drive the impedance

  3. Pervasive Computing and Communication Technologies for U-Learning

    ERIC Educational Resources Information Center

    Park, Young C.

    2014-01-01

    The development of digital information transfer, storage and communication methods influences a significant effect on education. The assimilation of pervasive computing and communication technologies marks another great step forward, with Ubiquitous Learning (U-learning) emerging for next generation learners. In the evolutionary view the 5G (or…

  4. Computer-Assisted Foreign Language Teaching and Learning: Technological Advances

    ERIC Educational Resources Information Center

    Zou, Bin; Xing, Minjie; Wang, Yuping; Sun, Mingyu; Xiang, Catherine H.

    2013-01-01

    Computer-Assisted Foreign Language Teaching and Learning: Technological Advances highlights new research and an original framework that brings together foreign language teaching, experiments and testing practices that utilize the most recent and widely used e-learning resources. This comprehensive collection of research will offer linguistic…

  5. Computer Account Request Form ETSU Office of Information Technology

    E-print Network

    Karsai, Istvan

    requesting that a Solaris operating system account with the name __________________ be created on any system owned, operated and/or maintained by ETSU in order to protect the integrity and securityComputer Account Request Form ETSU Office of Information Technology 424 Roy S. Nicks Hall, Box

  6. NASA CST aids U.S. industry. [computational structures technology

    NASA Technical Reports Server (NTRS)

    Housner, Jerry M.; Pinson, Larry D.

    1993-01-01

    The effect of NASA's computational structures Technology (CST) research on aerospace vehicle design and operation is discussed. The application of this research to proposed version of a high-speed civil transport, to composite structures in aerospace, to the study of crack growth, and to resolving field problems is addressed.

  7. SOE Computing Support Provided by Information Technology Services (ITS)

    E-print Network

    Karplus, Kevin

    SOE Computing Support Provided by Information Technology Services (ITS) ITS - SOE Local Services://itrequest.ucsc.edu Use Problem Type "SOE Services" Phone: 459-HELP Email: help@ucsc.edu ITS Local Helpdesk - Baskin Engineering Room 311 SOE Help Desk has limited hours; Main ITS help desk open 8a ­ 5p support.soe

  8. girl-tech.jpggirl-tech.jpg Computing and Technology

    E-print Network

    Hell, Pavol

    girl-tech.jpggirl-tech.jpg Computing and Technology Conference for Her SPONSORSHIP OPPORTUNITIES organized specifically for high school girls from grades eight to twelve, with the objective of fostering, Sara Adineh at sadineh@sfu.ca + #12;3 + Benefits v Inspire high school girls to follow

  9. Introduction to CAD/Computers. High-Technology Training Module.

    ERIC Educational Resources Information Center

    Lockerby, Hugh

    This learning module for an eighth-grade introductory technology course is designed to help teachers introduce students to computer-assisted design (CAD) in a communications unit on graphics. The module contains a module objective and five specific objectives, a content outline, suggested instructor methodology, student activities, a list of six…

  10. Roadmap: Technical and Applied Studies Computer Technology Internet/Multimedia

    E-print Network

    Sheridan, Scott

    Internet/Multimedia ­ Bachelor of Technical and Applied Studies [RE-BTAS-TAS-CTIM] Regional College CatalogRoadmap: Technical and Applied Studies ­ Computer Technology Internet/Multimedia ­ Bachelor of Technical and Applied Studies [RE-BTAS-TAS-CTIM] Regional College Catalog Year: 2012-2013 Page 1 of 3 | Last

  11. Four-stage computational technology with adaptive numerical methods for computational aerodynamics

    NASA Astrophysics Data System (ADS)

    Shaydurov, V.; Liu, T.; Zheng, Z.

    2012-10-01

    Computational aerodynamics is a key technology in aircraft design which is ahead of physical experiment and complements it. Of course all three components of computational modeling are actively developed: mathematical models of real aerodynamic processes, numerical algorithms, and high-performance computing. The most impressive progress has been made in the field of computing, though with a considerable complication of computer architecture. Numerical algorithms are developed more conservative. More precisely, they are offered and theoretically justified for more simple mathematical problems. Nevertheless, computational mathematics now has amassed a whole palette of numerical algorithms that can provide acceptable accuracy and interface between modern mathematical models in aerodynamics and high-performance computers. A significant step in this direction was the European Project ADIGMA whose positive experience will be used in International Project TRISTAM for further movement in the field of computational technologies for aerodynamics. This paper gives a general overview of objectives and approaches intended to use and a description of the recommended four-stage computer technology.

  12. Overview of European technology in computers, telecommunications, and electronics

    NASA Astrophysics Data System (ADS)

    Blackburn, J. F.

    1990-05-01

    The emergence of the personal computer, the growing use of distributed systems, and the increasing demand for supercomputers and mini-supercomputers are causing a profound impact on the European computer market. An equally profound development in telecommunications is the integration of voice, data, and images in the public network systems - the Integrated Service Digital Network (ISDN). The programs being mounted in Europe to meet the challenges of these technologies are described. The Europe-wide trends and actions with respect to computers, telecommunications, and microelectronics are discussed, and the major European collaborative programs in these fields are described. Specific attention is given to the European Strategic Programme for Research and Development in Information (ESPRIT); Research in Advanced Communications for Europe (RACE); European Research Coordination Agency (Eureka) programs; Joint European Submicron Silicon Initiative (JESSI); and the recently combined programs Basic Research Industrial Technologies in Europe/European Research in Advanced Materials (BRITE/EURAM).

  13. Damage Detection Using Holography and Interferometry

    NASA Technical Reports Server (NTRS)

    Decker, Arthur J.

    2003-01-01

    This paper reviews classical approaches to damage detection using laser holography and interferometry. The paper then details the modern uses of electronic holography and neural-net-processed characteristic patterns to detect structural damage. The design of the neural networks and the preparation of the training sets are discussed. The use of a technique to optimize the training sets, called folding, is explained. Then a training procedure is detailed that uses the holography-measured vibration modes of the undamaged structures to impart damage-detection sensitivity to the neural networks. The inspections of an optical strain gauge mounting plate and an International Space Station cold plate are presented as examples.

  14. Holography with standing surface plasma waves

    NASA Technical Reports Server (NTRS)

    Cowan, J. J.

    1974-01-01

    Holography with standing surface plasma waves, where both reference and object beams propagate in opposite directions, has been investigated using an Al reflection grating coated with evaporated As2S3 layers. The image, which appears only for p-polarization and at certain critical angles, is enhanced by the Lippman-Bragg effect and by an increase in intensity over ordinary holography approximately equal to the absolute value of the real part of the dielectric constant for Al. Also considered is holography with object light alone in photoresist layers, using the beam-splitting properties of the grating.

  15. Artistic Representation with Pulsed Holography

    NASA Astrophysics Data System (ADS)

    Ishii, S.

    2013-02-01

    This thesis describes artistic representation through pulsed holography. One of the prevalent practical problems in making holograms is object movement. Any movement of the object or film, including movement caused by acoustic vibration, has the same fatal results. One way of reducing the chance of movement is by ensuring that the exposure is very quick; using a pulsed laser can fulfill this objective. The attractiveness of using pulsed laser is based on the variety of materials or objects that can be recorded (e.g., liquid material or instantaneous scene of a moving object). One of the most interesting points about pulsed holograms is that some reconstructed images present us with completely different views of the real world. For example, the holographic image of liquid material does not appear fluid; it looks like a piece of hard glass that would produce a sharp sound upon tapping. In everyday life, we are unfamiliar with such an instantaneous scene. On the other hand, soft-textured materials such as a feather or wool differ from liquids when observed through holography. Using a pulsed hologram, we can sense the soft touch of the object or material with the help of realistic three-dimensional (3-D) images. The images allow us to realize the sense of touch in a way that resembles touching real objects. I had the opportunity to use a pulsed ruby laser soon after I started to work in the field of holography in 1979. Since then, I have made pulsed holograms of activities, including pouring water, breaking eggs, blowing soap bubbles, and scattering feathers and popcorn. I have also created holographic art with materials and objects, such as silk fiber, fabric, balloons, glass, flowers, and even the human body. Whenever I create art, I like to present the spectator with a new experience in perception. Therefore, I would like to introduce my experimental artwork through those pulsed holograms.

  16. Computer Technology in Eastern European Countries and the Former Soviet Union: An Interpretative Bibliography.

    ERIC Educational Resources Information Center

    Jankowska, Maria Anna

    1993-01-01

    Presents an annotated bibliography of 44 information sources on computer technology in Eastern Europe. Topics addressed include the history of computer technology in former Soviet Bloc countries; computer use in the economic, military, and educational sectors; information technology and its effect on society; and technology transfer and East-West…

  17. Seismic Holography of Solar Activity

    NASA Technical Reports Server (NTRS)

    Lindsey, Charles

    2000-01-01

    The basic goal of the project was to extend holographic seismic imaging techniques developed under a previous NASA contract, and to incorporate phase diagnostics. Phase-sensitive imaging gives us a powerful probe of local thermal and Doppler perturbations in active region subphotospheres, allowing us to map thermal structure and flows associated with "acoustic moats" and "acoustic glories". These remarkable features were discovered during our work, by applying simple acoustic power holography to active regions. Included in the original project statement was an effort to obtain the first seismic images of active regions on the Sun's far surface.

  18. Report of the Panel on Computer and Information Technology

    NASA Technical Reports Server (NTRS)

    Lundstrom, Stephen F.; Larsen, Ronald L.

    1984-01-01

    Aircraft have become more and more dependent on computers (information processing) for improved performance and safety. It is clear that this activity will grow, since information processing technology has advanced by a factor of 10 every 5 years for the past 35 years and will continue to do so. Breakthroughs in device technology, from vacuum tubes through transistors to integrated circuits, contribute to this rapid pace. This progress is nearly matched by similar, though not as dramatic, advances in numerical software and algorithms. Progress has not been easy. Many technical and nontechnical challenges were surmounted. The outlook is for continued growth in capability but will require surmounting new challenges. The technology forecast presented in this report has been developed by extrapolating current trends and assessing the possibilities of several high-risk research topics. In the process, critical problem areas that require research and development emphasis have been identified. The outlook assumes a positive perspective; the projected capabilities are possible by the year 2000, and adequate resources will be made available to achieve them. Computer and information technology forecasts and the potential impacts of this technology on aeronautics are identified. Critical issues and technical challenges underlying the achievement of forecasted performance and benefits are addressed.

  19. Entanglement entropy in Galilean conformal field theories and flat holography

    E-print Network

    Arjun Bagchi; Rudranil Basu; Daniel Grumiller; Max Riegler

    2014-10-15

    We present the analytical calculation of entanglement entropy for a class of two dimensional field theories governed by the symmetries of the Galilean conformal algebra, thus providing a rare example of such an exact computation. These field theories are the putative holographic duals to theories of gravity in three-dimensional asymptotically flat spacetimes. We provide a check of our field theory answers by an analysis of geodesics. We also exploit the Chern-Simons formulation of three-dimensional gravity and adapt recent proposals of calculating entanglement entropy by Wilson lines in this context to find an independent confirmation of our results from holography.

  20. Entanglement Entropy in Galilean Conformal Field Theories and Flat Holography

    NASA Astrophysics Data System (ADS)

    Bagchi, Arjun; Basu, Rudranil; Grumiller, Daniel; Riegler, Max

    2015-03-01

    We present the analytical calculation of entanglement entropy for a class of two-dimensional field theories governed by the symmetries of the Galilean conformal algebra, thus providing a rare example of such an exact computation. These field theories are the putative holographic duals to theories of gravity in three-dimensional asymptotically flat spacetimes. We provide a check of our field theory answers by an analysis of geodesics. We also exploit the Chern-Simons formulation of three-dimensional gravity and adapt recent proposals of calculating entanglement entropy by Wilson lines in this context to find an independent confirmation of our results from holography.

  1. Entanglement entropy in galilean conformal field theories and flat holography.

    PubMed

    Bagchi, Arjun; Basu, Rudranil; Grumiller, Daniel; Riegler, Max

    2015-03-20

    We present the analytical calculation of entanglement entropy for a class of two-dimensional field theories governed by the symmetries of the Galilean conformal algebra, thus providing a rare example of such an exact computation. These field theories are the putative holographic duals to theories of gravity in three-dimensional asymptotically flat spacetimes. We provide a check of our field theory answers by an analysis of geodesics. We also exploit the Chern-Simons formulation of three-dimensional gravity and adapt recent proposals of calculating entanglement entropy by Wilson lines in this context to find an independent confirmation of our results from holography. PMID:25839258

  2. Optical encryption of three-dimensional information with digital holography

    NASA Astrophysics Data System (ADS)

    Liu, Ying-hong; Jin, Wei-min; Yang, Xin

    2014-11-01

    An encryption method combining optical digital holography with digital decryption on computer is proposed, which avoid the precise setup of optical devices. A digital hologram of three-dimensional (3D) object and a hologram of key information are recorded by optical method in the encryption process. The 3D object is reconstructed by filtering in spectrum domain and simple numerical calculation. The quality of reconstructed object is improved by reducing speckle noise. The robustness against occlusion and noise attacks of the system has also been analyzed. Optical experiments results are presented.

  3. Criteria for the observation of strong-field photoelectron holography

    SciTech Connect

    Marchenko, T. [UPMC Universite Paris 06, CNRS, UMR 7614, Laboratoire de Chimie Physique Matiere et Rayonnement, 11 rue Pierre et Marie Curie, F-75005 Paris (France); Huismans, Y. [FOM-Institute AMOLF, Science Park 113, 1098 XG Amsterdam (Netherlands); Schafer, K. J. [Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001 (United States); Vrakking, M. J. J. [FOM-Institute AMOLF, Science Park 113, 1098 XG Amsterdam (Netherlands); Max-Born-Institut, Max Born Strasse 2A, D-12489 Berlin (Germany)

    2011-11-15

    Photoelectron holography is studied experimentally and computationally using the ionization of ground-state xenon atoms by intense near-infrared radiation. A strong dependence of the occurrence of the holographic pattern on the laser wavelength and intensity is observed, and it is shown that the observation of the hologram requires that the ponderomotive energy U{sub p} is substantially larger than the photon energy. The holographic interference is therefore favored by longer wavelengths and higher laser intensities. Our results indicate that the tunneling regime is not a necessary condition for the observation of the holographic pattern, which can be observed under the conditions formally attributed to the multiphoton regime.

  4. National Energy Research Scientific Computing Center (NERSC): Advancing the frontiers of computational science and technology

    SciTech Connect

    Hules, J. [ed.

    1996-11-01

    National Energy Research Scientific Computing Center (NERSC) provides researchers with high-performance computing tools to tackle science`s biggest and most challenging problems. Founded in 1974 by DOE/ER, the Controlled Thermonuclear Research Computer Center was the first unclassified supercomputer center and was the model for those that followed. Over the years the center`s name was changed to the National Magnetic Fusion Energy Computer Center and then to NERSC; it was relocated to LBNL. NERSC, one of the largest unclassified scientific computing resources in the world, is the principal provider of general-purpose computing services to DOE/ER programs: Magnetic Fusion Energy, High Energy and Nuclear Physics, Basic Energy Sciences, Health and Environmental Research, and the Office of Computational and Technology Research. NERSC users are a diverse community located throughout US and in several foreign countries. This brochure describes: the NERSC advantage, its computational resources and services, future technologies, scientific resources, and computational science of scale (interdisciplinary research over a decade or longer; examples: combustion in engines, waste management chemistry, global climate change modeling).

  5. Cloud computing and patient engagement: leveraging available technology.

    PubMed

    Noblin, Alice; Cortelyou-Ward, Kendall; Servan, Rosa M

    2014-01-01

    Cloud computing technology has the potential to transform medical practices and improve patient engagement and quality of care. However, issues such as privacy and security and "fit" can make incorporation of the cloud an intimidating decision for many physicians. This article summarizes the four most common types of clouds and discusses their ideal uses, how they engage patients, and how they improve the quality of care offered. This technology also can be used to meet Meaningful Use requirements 1 and 2; and, if speculation is correct, the cloud will provide the necessary support needed for Meaningful Use 3 as well. PMID:25807597

  6. Using Computer Spatial Technologies (Geoplus Petra) for Subsurface Geological Analysis

    NSDL National Science Digital Library

    Dave Barnes

    The student compiles oil field well data, including spatial locations and digital well logs, for analysis of subsurface, oil reservoir stratigraphy and lithology using computer spatial technologies software, Geoplus Petra. The students create well log cross sections, make lithologic picks, construct structure and isopach maps, and evaluate lithologic properties, including gross reservoir quality from petrophysical logs. These data are used to interpret depositional environment of the subject formation and make predictions for well bore perforations for oil production. The key value of the exercise is an introduction to the use of computer software to analyze geological data, guided by sedimentologic and stratigraphic insights, and make predictions for resource exploitation.

  7. Digital spatially incoherent Fresnel holography Joseph Rosen*

    E-print Network

    Rosen, Joseph

    such as outdoor and astronomical holography1 and fluorescence holographic micro- scopy.2 The oldest methods holographic photography based on correlation without movement between objects and FZPs. However, their process

  8. Accelerating technology development through integrated computation and experimentation

    SciTech Connect

    Shekhawat, Dushyant [U.S. DOE; Srivastava, Rameshwar [Key Logic

    2013-01-01

    This special section of Energy & Fuels comprises a selection of papers presented at the topical conference “Accelerating Technology Development through Integrated Computation and Experimentation”, sponsored and organized by the United States Department of Energy’s National Energy Technology Laboratory (NETL) as part of the 2012 American Institute of Chemical Engineers (AIChE) Annual Meeting held in Pittsburgh, PA, Oct 28?Nov 2, 2012. That topical conference focused on the latest research and development efforts in five main areas related to fossil energy, with each area focusing on the utilization of both experimental and computational approaches: (1) gas separations (membranes, sorbents, and solvents for CO{sub 2}, H{sub 2}, and O{sub 2} production), (2) CO{sub 2} utilization (enhanced oil recovery, chemical production, mineralization, etc.), (3) carbon sequestration (flow in natural systems), (4) advanced power cycles (oxy-combustion, chemical looping, gasification, etc.), and (5) fuel processing (H{sub 2} production for fuel cells).

  9. Vector Field Visual Data Analysis Technologies for Petascale Computational Science

    SciTech Connect

    Garth, Christoph; Deines, Eduard; Joy, Kenneth I.; Bethel, E. Wes; Childs, Hank; Weber, Gunther; Ahern, Sean; Pugmire, Dave; Sanderson, Allen; Johnson, Chris

    2009-11-13

    State-of-the-art computational science simulations generate large-scale vector field data sets. Visualization and analysis is a key aspect of obtaining insight into these data sets and represents an important challenge. This article discusses possibilities and challenges of modern vector field visualization and focuses on methods and techniques developed in the SciDAC Visualization and Analytics Center for Enabling Technologies (VACET) and deployed in the open-source visualization tool, VisIt.

  10. Reviews of computing technology: Fiber distributed data interface

    SciTech Connect

    Johnson, A.J.

    1991-12-01

    Fiber Distributed Data Interface, more commonly known as FDDI, is the name of the standard that describes a new local area network (LAN) technology for the 90's. This technology is based on fiber optics communications and, at a data transmission rate of 100 million bits per second (mbps), provides a full order of magnitude improvement over previous LAN standards such as Ethernet and Token Ring. FDDI as a standard has been accepted by all major computer manufacturers and is a national standard as defined by the American National Standards Institute (ANSI). FDDI will become part of the US Government Open Systems Interconnection Profile (GOSIP) under Version 3 GOSIP and will become an international standard promoted by the International Standards Organization (ISO). It is important to note that there are no competing standards for high performance LAN's so that FDDI acceptance is nearly universal. This technology report describes FDDI as a technology, looks at the applications of this technology, examine the current economics of using it, and describe activities and plans by the Information Resource Management (IRM) department to implement this technology at the Savannah River Site.

  11. Reviews of computing technology: Fiber distributed data interface

    SciTech Connect

    Johnson, A.J.

    1991-12-01

    Fiber Distributed Data Interface, more commonly known as FDDI, is the name of the standard that describes a new local area network (LAN) technology for the 90`s. This technology is based on fiber optics communications and, at a data transmission rate of 100 million bits per second (mbps), provides a full order of magnitude improvement over previous LAN standards such as Ethernet and Token Ring. FDDI as a standard has been accepted by all major computer manufacturers and is a national standard as defined by the American National Standards Institute (ANSI). FDDI will become part of the US Government Open Systems Interconnection Profile (GOSIP) under Version 3 GOSIP and will become an international standard promoted by the International Standards Organization (ISO). It is important to note that there are no competing standards for high performance LAN`s so that FDDI acceptance is nearly universal. This technology report describes FDDI as a technology, looks at the applications of this technology, examine the current economics of using it, and describe activities and plans by the Information Resource Management (IRM) department to implement this technology at the Savannah River Site.

  12. Computer-Based Learning: The Key 'Technological Multiplier' for Technology Transfer.

    ERIC Educational Resources Information Center

    Reynolds, Angus

    1982-01-01

    The use of computer-based learning (CBL) is discussed. The author examines the appropriate use of the technology; its cost; identifying the best potential applications of CBL; and the use of CBL by major airlines, oil companies, universities, manufacturers, and government. (CT)

  13. Foreign and Domestic Accomplishments in Magnetic Bubble Device Technology. Computer Science & Technology.

    ERIC Educational Resources Information Center

    Warnar, Robert B. J.; Calomeris, Peter J.

    This document assesses the status of magnetic bubble technology as displayed by non-U.S. research and manufacturing facilities. Non-U.S. research and U.S. accomplishments are described while both technical and economic factors are addressed. Magnetic bubble devices are discussed whenever their application could impact future computer system…

  14. A virtual computer lab for distance biomedical technology education

    PubMed Central

    Locatis, Craig; Vega, Anibal; Bhagwat, Medha; Liu, Wei-Li; Conde, Jose

    2008-01-01

    Background The National Library of Medicine's National Center for Biotechnology Information offers mini-courses which entail applying concepts in biochemistry and genetics to search genomics databases and other information sources. They are highly interactive and involve use of 3D molecular visualization software that can be computationally taxing. Methods Methods were devised to offer the courses at a distance so as to provide as much functionality of a computer lab as possible, the venue where they are normally taught. The methods, which can be employed with varied videoconferencing technology and desktop sharing software, were used to deliver mini-courses at a distance in pilot applications where students could see demonstrations by the instructor and the instructor could observe and interact with students working at their remote desktops. Results Student ratings of the learning experience and comments to open ended questions were similar to those when the courses are offered face to face. The real time interaction and the instructor's ability to access student desktops from a distance in order to provide individual assistance and feedback were considered invaluable. Conclusion The technologies and methods mimic much of the functionality of computer labs and may be usefully applied in any context where content changes frequently, training needs to be offered on complex computer applications at a distance in real time, and where it is necessary for the instructor to monitor students as they work. PMID:18366629

  15. Computer-assisted liver surgery: clinical applications and technological trends.

    PubMed

    Peterhans, Matthias; Oliveira, Thiago; Banz, Vanessa; Candinas, Daniel; Weber, Stefan

    2012-01-01

    Oncological liver surgery and interventions aim for removal of tumor tissue while preserving a sufficient amount of functional tissue to ensure organ regeneration. This requires detailed understanding of the patient-specific internal organ anatomy (blood vessel system, bile ducts, tumor location). The introduction of computer support in the surgical process enhances anatomical orientation through patient-specific 3D visualization and enables precise reproduction of planned surgical strategies though stereotactic navigation technology. This article provides clinical background information on indications and techniques for the treatment of liver tumors, reviews the technological contributions addressing the problem of organ motion during navigated surgery on a deforming organ, and finally presents an overview of the clinical experience in computer-assisted liver surgery and interventions. The review concludes that several clinically applicable solutions for computer aided liver surgery are available and small-scale clinical trials have been performed. Further developments will be required more accurate and faster handling of organ deformation and large clinical studies will be required for demonstrating the benefits of computer aided liver surgery. PMID:22694200

  16. An Overview of Quantum Computing for Technology Managers

    E-print Network

    Eleanor G. Rieffel

    2008-09-26

    Faster algorithms, novel cryptographic mechanisms, and alternative methods of communication become possible when the model underlying information and computation changes from a classical mechanical model to a quantum mechanical one. Quantum algorithms perform a select set of tasks vastly more efficiently than any classical algorithm, but for many tasks it has been proved that quantum algorithms provide no advantage. The breadth of quantum computing applications is still being explored. Major application areas include security and the many fields that would benefit from efficient quantum simulation. The quantum information processing viewpoint provides insight into classical algorithmic issues as well as a deeper understanding of entanglement and other non-classical aspects of quantum physics. This overview is aimed at technology managers who wish to gain a high level understanding of quantum information processing, particularly quantum computing.

  17. Shallow depth subsurface imaging with microwave holography

    NASA Astrophysics Data System (ADS)

    Zhuravlev, Andrei; Ivashov, Sergey; Razevig, Vladimir; Vasiliev, Igor; Bechtel, Timothy

    2014-05-01

    In this paper, microwave holography is considered as a tool to obtain high resolution images of shallowly buried objects. Signal acquisition is performed at multiple frequencies on a grid using a two-dimensional mechanical scanner moving a single transceiver over an area of interest in close proximity to the surface. The described FFT-based reconstruction technique is used to obtain a stack of plan view images each using only one selected frequency from the operating waveband of the radar. The extent of a synthetically-formed aperture and the signal wavelength define the plan view resolution, which at sounding frequencies near 7 GHz amounts to 2 cm. The system has a short depth of focus which allows easy selection of proper focusing plane. The small distance from the buried objects to the antenna does not prevent recording of clean images due to multiple reflections (as happens with impulse radars). The description of the system hardware and signal processing technique is illustrated using experiments conducted in dry sand. The microwave images of inert anti-personnel mines are demonstrated as examples. The images allow target discrimination based on the same visually-discernible small features that a human observer would employ. The demonstrated technology shows promise for modification to meet the specific practical needs required for humanitarian demining or in multi-sensor survey systems.

  18. Micro-optical elements in holography

    NASA Astrophysics Data System (ADS)

    von Bally, Gert; Dirksen, Dieter; Zou, Yunlu

    1991-09-01

    Modern optical instrumentation increasingly requires miniaturization of the devices used, as is the case, e.g., in the field of endoscopy. The combination of such technology with holography offers advantages such as 3-D documentation and display with the possibility of large magnification a posteriori as well as metrology in form of holographic interferometry of objects with difficult optical access. Miniaturized holographic instrumentation requires small illumination and imaging systems, as well as minute recoding devices. As could be demonstrated, these requirements can be met by introduction of micro-optical elements. The use of (single-mode) optical fibers offers easy handling and flexibility. In particular, new single-mode imaging fiber bundles show improved performance data (high lateral resolution, low speckle noise, and low mode interaction) at submillimeter diameters. Assembled gradient- index rod lenses commonly are used for submillimeter imaging systems. In holographic endoscopy, speckle noise caused by these small limiting apertures can be reduced by using such a gradient-index imaging system simultaneously for both imaging and illumination. The use of electro-optical crystals opens the possibility of developing a minute holographic storage device for in-site recording, reconstruction, and erasure with fast repetition rate.

  19. Aging and Holography

    E-print Network

    Juan I. Jottar; Robert G. Leigh; Djordje Minic; Leopoldo A. Pando Zayas

    2010-08-11

    Aging phenomena are examples of `non-equilibrium criticality' and can be exemplified by systems with Galilean and scaling symmetries but no time translation invariance. We realize aging holographically using a deformation of a non-relativistic version of gauge/gravity duality. Correlation functions of scalar operators are computed using holographic real-time techniques, and agree with field theory expectations. At least in this setup, general aging phenomena are reproduced holographically by complexifying the bulk space-time geometry, even in Lorentzian signature.

  20. The Influence of Computer Technology Learning Program on Attitudes toward Computers and Self-Esteem among Arab Dropout Youth.

    ERIC Educational Resources Information Center

    Romi, Shlomo; Zoabi, Houssien

    2003-01-01

    Describes a study that examined the attitudes of Arab dropout youth in Israel toward the use of computer technology and the influence of this use on their self-esteem. Results supported the assumptions that exposure to computer technology would change the attitudes of dropout adolescents toward computers to positive ones. (Contains 43 references.)…

  1. Acoustic-emission linear-pulse holography

    SciTech Connect

    Collins, H.D.; Lemon, D.K.; Busse, L.J.

    1982-06-01

    This paper describes Acoustic Emission Linear Pulse Holography which combines the advantages of linear imaging and acoustic emission into a single NDE inspection system. This unique system produces a chronological linear holographic image of a flaw by utilizing the acoustic energy emitted during crack growth. Conventional linear holographic imaging uses an ultrasonic transducer to transmit energy into the volume being imaged. When the crack or defect reflects that energy, the crack acts as a new source of acoustic waves. To formulate an image of that source, a receiving transducer is scanned over the volume of interest and the phase of the received signals is measured at successive points on the scan. The innovation proposed here is the utilization of the crack generated acoustic emission as the acoustic source and generation of a line image of the crack as it grows. A thirty-two point sampling array is used to construct phase-only linear holograms of simulated acoustic emission sources on large metal plates. The phases are calculated using the pulse time-of-flight (TOF) times from the reference transducer to the array of receivers. Computer reconstruction of the image is accomplished using a one-dimensional FFT algorithm (i.e., backward wave). Experimental results are shown which graphically illustrate the unique acoustic emission images of a single point and a linear crack in a 100 mm x 1220 mm x 1220 mm aluminum plate.

  2. Try/CATCH (Computing and Technology Conference for Her) Women In Computing Science

    E-print Network

    Hell, Pavol

    /CATCH is a one-day event organized specifically for all high school girls school girls to learn about the latest innovations in technology and see where is to encourage high school girls to take an interest in computing science. Girls

  3. Unruh effect and Holography

    E-print Network

    Hirayama, Takayuki; Kawamoto, Shoichi; Lin, Feng-Li

    2010-01-01

    We study the Unruh effect on the dynamics of quarks and mesons in the context of AdS/CFT correspondence. We adopt an AdS metric with the boundary Rindler edge extending into a bulk Rindler-like horizon, which yields the thermodynamics with Unruh temperature verified by computing the boundary stress tensor. We then embed in it the probe fundamental string and D7 brane which are dual to the quark and meson in the Unruh vacuum, respectively. Using the standard procedure of holographic renormalization, we calculate the chiral condensate, and also the spectral functions for both quarks and mesons. From these, we extract the corresponding strength of random force of the Langevin dynamics and observe that it can characterize the phase transition of meson melting. We find most of the dynamical features are qualitatively similar to the ones in the thermal bath dual to the AdS black hole background, though could be quite different quantitatively.

  4. Image enhancement by holography.

    NASA Technical Reports Server (NTRS)

    Stroke, G. W.

    1973-01-01

    The speed of the holographic image deblurring method has recently been further enhanced by a new speed in the realization of the powerful holographic image-deblurring filter. The filter makes it possible to carry out the deblurring, in the optical computer used, in times of the order of one second. The experimental achievements using the holographic image-enhancement method are illustrated with examples ranging from out-of-focus or motion-blurred photographs, including 'amateur' photos recorded on Polaroid film, to the sharpening of the best available electron micrographs of viruses. Images recorded with X-rays, notably from rocket-borne photos of the sun, and out-of-focus photographs from cameras in NASA satellites have been similarly deblurred.

  5. Ultra wide band 3-D cross section (RCS) holography

    SciTech Connect

    Collins, H.D.; Hall, T.E.

    1992-07-01

    Ultra wide band impulse holography is an exciting new concept for predictive radar cross section (RCS) evaluation employing near-field measurements. Reconstruction of the near-field hologram data maps the target`s scattering areas, and uniquely identifies the ``hot spot`` locations on the target. In addition, the target and calibration sphere`s plane wave angular spectrums are computed (via digital algorithm) and used to generate the target`s far-field RCS values in three dimensions for each frequency component in the impulse. Thin and thick targets are defined in terms of their near-field amplitude variations in range. Range gating and computer holographic techniques are applied to correct these variations. Preliminary experimental results on various targets verify the concept of RCS holography. The unique 3-D presentation (i.e., typically containing 524,288 RCS values for a 1024 {times} 512 sampled aperture for every frequency component) illustrates the efficacy of target recognition in terms of its far-field plane wave angular spectrum image. RCS images can then be viewed at different angles for target recognition, etc.

  6. Ultra wide band 3-D cross section (RCS) holography

    SciTech Connect

    Collins, H.D.; Hall, T.E.

    1992-07-01

    Ultra wide band impulse holography is an exciting new concept for predictive radar cross section (RCS) evaluation employing near-field measurements. Reconstruction of the near-field hologram data maps the target's scattering areas, and uniquely identifies the hot spot'' locations on the target. In addition, the target and calibration sphere's plane wave angular spectrums are computed (via digital algorithm) and used to generate the target's far-field RCS values in three dimensions for each frequency component in the impulse. Thin and thick targets are defined in terms of their near-field amplitude variations in range. Range gating and computer holographic techniques are applied to correct these variations. Preliminary experimental results on various targets verify the concept of RCS holography. The unique 3-D presentation (i.e., typically containing 524,288 RCS values for a 1024 {times} 512 sampled aperture for every frequency component) illustrates the efficacy of target recognition in terms of its far-field plane wave angular spectrum image. RCS images can then be viewed at different angles for target recognition, etc.

  7. Quantum Decoherence with Holography

    E-print Network

    Shih-Hao Ho; Wei Li; Feng-Li Lin; Bo Ning

    2014-10-21

    Quantum decoherence is the loss of a system's purity due to its interaction with the surrounding environment. Via the AdS/CFT correspondence, we study how a system decoheres when its environment is a strongly-coupled theory. In the Feynman-Vernon formalism, we compute the influence functional holographically by relating it to the generating function of Schwinger-Keldysh propagators and thereby obtain the dynamics of the system's density matrix. We present two exactly solvable examples: (1) a straight string in a BTZ black hole and (2) a scalar probe in AdS$_5$. We prepare an initial state that mimics Schr\\"odinger's cat and identify different stages of its decoherence process using the time-scaling behaviors of R\\'enyi entropy. We also relate decoherence to local quantum quenches, and by comparing the time evolution behaviors of the Wigner function and R\\'enyi entropy we demonstrate that the relaxation of local quantum excitations leads to the collapse of its wave-function.

  8. Computer technology applications in industrial and organizational psychology.

    PubMed

    Crespin, Timothy R; Austin, James T

    2002-08-01

    This article reviews computer applications developed and utilized by industrial-organizational (I-O) psychologists, both in practice and in research. A primary emphasis is on applications developed for Internet usage, because this "network of networks" changes the way I-O psychologists work. The review focuses on traditional and emerging topics in I-O psychology. The first topic involves information technology applications in measurement, defined broadly across levels of analysis (persons, groups, organizations) and domains (abilities, personality, attitudes). Discussion then focuses on individual learning at work, both in formal training and in coping with continual automation of work. A section on job analysis follows, illustrating the role of computers and the Internet in studying jobs. Shifting focus to the group level of analysis, we briefly review how information technology is being used to understand and support cooperative work. Finally, special emphasis is given to the emerging "third discipline" in I-O psychology research-computational modeling of behavioral events in organizations. Throughout this review, themes of innovation and dissemination underlie a continuum between research and practice. The review concludes by setting a framework for I-O psychology in a computerized and networked world. PMID:12216695

  9. Schrödinger holography with z = 2

    NASA Astrophysics Data System (ADS)

    Andrade, Tomás; Keeler, Cynthia; Peach, Alex; Ross, Simon F.

    2015-04-01

    We investigate holography for asymptotically Schrödinger spacetimes, using a frame formalism based on the anisotropic scaling symmetry. We build on our previous work on z\\lt 2 to propose a dictionary for z = 2. For z = 2, the scaling symmetry does not act on the additional null direction, which implies that in our dictionary it does not correspond to one of the field theory directions. This is significantly different from previous analyses based on viewing Schrödinger as a deformation of AdS. We study this dictionary in the linearized theory and in an asymptotic expansion. We show that a solution exists in an asymptotic expansion for arbitrary sources for the relevant operators in the stress energy complex.

  10. Acoustic emission linear pulse holography

    DOEpatents

    Collins, H.D.; Busse, L.J.; Lemon, D.K.

    1983-10-25

    This device relates to the concept of and means for performing Acoustic Emission Linear Pulse Holography, which combines the advantages of linear holographic imaging and Acoustic Emission into a single non-destructive inspection system. This unique system produces a chronological, linear holographic image of a flaw by utilizing the acoustic energy emitted during crack growth. The innovation is the concept of utilizing the crack-generated acoustic emission energy to generate a chronological series of images of a growing crack by applying linear, pulse holographic processing to the acoustic emission data. The process is implemented by placing on a structure an array of piezoelectric sensors (typically 16 or 32 of them) near the defect location. A reference sensor is placed between the defect and the array.

  11. Schrödinger Holography with $z=2$

    E-print Network

    Tomas Andrade; Cynthia Keeler; Alex Peach; Simon F. Ross

    2015-01-08

    We investigate holography for asymptotically Schr\\"odinger spacetimes, using a frame formalism based on the anisotropic scaling symmetry. We build on our previous work on $z<2$ to propose a dictionary for $z=2$. For $z=2$, the scaling symmetry does not act on the additional null direction, which implies that in our dictionary it does not correspond to one of the field theory directions. This is significantly different from previous analyses based on viewing Schr\\"odinger as a deformation of AdS. We study this dictionary in the linearised theory and in an asymptotic expansion. We show that a solution exists in an asymptotic expansion for arbitrary sources for the relevant operators in the stress energy complex.

  12. Technologies for Large Data Management in Scientific Computing

    NASA Astrophysics Data System (ADS)

    Pace, Alberto

    2014-01-01

    In recent years, intense usage of computing has been the main strategy of investigations in several scientific research projects. The progress in computing technology has opened unprecedented opportunities for systematic collection of experimental data and the associated analysis that were considered impossible only few years ago. This paper focuses on the strategies in use: it reviews the various components that are necessary for an effective solution that ensures the storage, the long term preservation, and the worldwide distribution of large quantities of data that are necessary in a large scientific research project. The paper also mentions several examples of data management solutions used in High Energy Physics for the CERN Large Hadron Collider (LHC) experiments in Geneva, Switzerland which generate more than 30,000 terabytes of data every year that need to be preserved, analyzed, and made available to a community of several tenth of thousands scientists worldwide.

  13. An empirical study of technological pressure in the personal computer technology system

    Microsoft Academic Search

    Ozgur Dedehayir

    2008-01-01

    This paper studies the co-evolution of the GPU (graphics processing unit) and PC (personal computer) game sub-systems, with respect to graphics performance delivered to end-users during game play. Employing the concept of the reverse salient - a component which trails in technological performance and thus hinders potential system-wide development - the paper develops time-gap and performance-gap measures of reverse salience

  14. Exploring de Sitter Space and Holography

    E-print Network

    Vijay Balasubramanian; Jan de Boer; Djordje Minic

    2002-09-11

    We explore aspects of the physics of de Sitter (dS) space that are relevant to holography with a positive cosmological constant. First we display a nonlocal map that commutes with the de Sitter isometries, transforms the bulk-boundary propagator and solutions of free wave equations in de Sitter onto the same quantities in Euclidean anti-de Sitter (EAdS), and takes the two boundaries of dS to the single EAdS boundary via an antipodal identification. Second we compute the action of scalar fields on dS as a functional of boundary data. Third, we display a family of solutions to 3d gravity with a positive cosmological constant in which the equal time sections are arbitrary genus Riemann surfaces, and compute the action of these spaces as a functional of boundary data from the Einstein gravity and Chern-Simons gravity points of view. These studies suggest that if de Sitter space is dual to a Euclidean conformal field theory (CFT), this theory should involve two disjoint, but possibly entangled factors. We argue that these CFTs would be of a novel form, with unusual hermiticity conditions relating left movers and right movers. After exploring these conditions in a toy model, we combine our observations to propose that a holographic dual description of de Sitter space would involve a pure entangled state in a product of two of our unconventional CFTs associated with the de Sitter boundaries. This state can be constructed to preserve the de Sitter symmetries and and its decomposition in a basis appropriate to antipodal inertial observers would lead to the thermal properties of static patch.

  15. Performance Evaluation of Emerging High Performance Computing Technologies using WRF

    NASA Astrophysics Data System (ADS)

    Newby, G. B.; Morton, D.

    2008-12-01

    The Arctic Region Supercomputing Center (ARSC) has evaluated multicore processors and other emerging processor technologies for a variety of high performance computing applications in the earth and space sciences, especially climate and weather applications. A flagship effort has been to assess dual core processor nodes on ARSC's Midnight supercomputer, in which two-socket systems were compared to eight-socket systems. Midnight is utilized for ARSC's twice-daily weather research and forecasting (WRF) model runs, available at weather.arsc.edu. Among other findings on Midnight, it was found that the Hypertransport system for interconnecting Opteron processors, memory, and other subsystems does not scale as well on eight-socket (sixteen processor) systems as well as two-socket (four processor) systems. A fundamental limitation is the cache snooping operation performed whenever a computational thread accesses main memory. This increases memory latency as the number of processor sockets increases. This is particularly noticeable on applications such as WRF that are primarily CPU-bound, versus applications that are bound by input/output or communication. The new Cray XT5 supercomputer at ARSC features quad core processors, and will host a variety of scaling experiments for WRF, CCSM4, and other models. Early results will be presented, including a series of WRF runs for Alaska with grid resolutions under 2km. ARSC will discuss a set of standardized test cases for the Alaska domain, similar to existing test cases for CONUS. These test cases will provide different configuration sizes and resolutions, suitable for single processors up to thousands. Beyond multi-core Opteron-based supercomputers, ARSC has examined WRF and other applications on additional emerging technologies. One such technology is the graphics processing unit, or GPU. The 9800-series nVidia GPU was evaluated with the cuBLAS software library. While in-socket GPUs might be forthcoming in the future, current generations of GPUs lack a sufficient balance of computational resources to replace the general-purpose microprocessor found in most traditional supercomputer architectures. ARSC has also worked with the Cell Broadband Engine in a small Playstation3 cluster, as well as a 24-processor system based on IBM's QS22 blades. The QS22 system, called Quasar, features the PowerXCell 8i processor found in the RoadRunner system, along with an InfiniBand network and high performance storage. Quasar overcomes the limitations of the small memory and relatively slow network of the PS3 systems. The presentation will include system-level benchmarks on Quasar, as well as evaluation of the WRF test cases. Another technology evaluation focused on Sun's UltraSPARC T2+ processor, which ARSC evaluated in a two-way system. Each T2+ provides eight processor cores, each of which provides eight threads, for a total of 128 threads in a single system. WRF scalability was good up to the number of cores, but multiple threads per core did not scale as well. Throughout the discussion, practical findings from ARSC will be summarized. While multicore general-purpose microprocessors are anticipated to remain important for large computers running earth and space science applications, the role of other potentially disruptive technologies is less certain. Limitations of current and future technologies will be discussed. class="ab'>

  16. Fluidic technology: adding control, computation, and sensing capability to microfluidics

    NASA Astrophysics Data System (ADS)

    Drzewiecki, Tadeusz M.; Macia, Narciso F.

    2003-04-01

    This paper presents an overview of fluidic technology - a technology that provides an additional dimension to conventional microfluidic technology by adding sensing, computation (both analog and digital) and control. The US Army Diamond Ordnance Fuze Labs officially recognized fluidics as a comprehensive technology comparable to electronics with its announcement in 1959. Because fluidic elements have very few or no moving parts the technology provides significant operational advantages in harsh environments (EMI, radiation, high temperature and vibration). It also offers advantages when dealing with fluid variables (flow, pressure, density, viscosity, etc.) by eliminating the need for interfaces. With the elimination of the inertia and friction associated with moving parts there are even greater advantages as a result of higher speed of operation. Where mechanical and micromechanical devices may be limited to only hundreds of hertz true microfluidic systems can operate at tens of thousands of hertz. We discuss the fundamental principles of jet deflection amplification and vortex modulation and present circuit building blocks such as the laminar proportional amplifier, vortex valve, oscillators, and positive-feedback digital components. However, most importantly, we present and discuss three specific applications illustrating the power of fluidics in microfluidics and MEMS. These are: a gas analyzer-on-a-chip, capable of simultaneous analysis of multiple gas mixtures with clinical accuracies; an intermittent oxygen delivery system that provides supplemental oxygen to ambulatory patients through a nasal cannula; and, an array of vortex microvalves capable of controlling propellants for micropropulsion systems or for the temporal and spatial modulation of fuel for the optimal control of gas turbine combustors. A sampling of other fluidic in microfluidic application are mentioned to include pressure and acoustic amplification (a kosher public address system is referenced), active noise cancellation for aircraft engines and passenger compartments, optical-pneumatic transduction in optical fiber missile controls and natural gas processing, angular rate sensing, and microcytometry for cellular processing. Fluidics may be the enabling technology for many as yet undeveloped applications, particularly when recent advances micro-fabrication are taken advantage of.

  17. Technological Metaphors and Moral Education: The Hacker Ethic and the Computational Experience

    ERIC Educational Resources Information Center

    Warnick, Bryan R.

    2004-01-01

    This essay is an attempt to understand how technological metaphors, particularly computer metaphors, are relevant to moral education. After discussing various types of technological metaphors, it is argued that technological metaphors enter moral thought through their "functional descriptions." The computer metaphor is then explored by turning to…

  18. Important Advances in Technology and Unique Applications to Cardiovascular Computed Tomography

    PubMed Central

    Chaikriangkrai, Kongkiat; Choi, Su Yeon; Nabi, Faisal; Chang, Su Min

    2014-01-01

    For the past decade, multidetector cardiac computed tomography and its main application, coronary computed tomography angiography, have been established as a noninvasive technique for anatomical assessment of coronary arteries. This new era of coronary artery evaluation by coronary computed tomography angiography has arisen from the rapid advancement in computed tomography technology, which has led to massive diagnostic and prognostic clinical studies in various patient populations. This article gives a brief overview of current multidetector cardiac computed tomography systems, developing cardiac computed tomography technologies in both hardware and software fields, innovative radiation exposure reduction measures, multidetector cardiac computed tomography functional studies, and their newer clinical applications beyond coronary computed tomography angiography. PMID:25574342

  19. The Technology Refresh Program: Affording State-of-the Art Personal Computing.

    ERIC Educational Resources Information Center

    Spiwak, Rand

    2000-01-01

    Describes the Florida Community College Technology Refresh Program in which 28 Florida community colleges refresh their personal computer technology on a three-year cyclical basis through negotiation of a contract with Dell Computer Corporation. Discusses the contract highlights (such as a 22.5 percent discount on personal computers and on-site…

  20. New Toys for Young Children: Integration of Computer Technology into Early Childhood Education

    Microsoft Academic Search

    Nesrin ISIKOGLU

    2003-01-01

    In recent years there has been a dramatic increase in the availability of computers in educational settings. Since the technology became available for all ages, the amount of technology usage increased in early childhood classrooms (Haugland, 1997). Despite of the dramatic increase of computers in early childhood classrooms, there are still arguments about how to use computers in more effective

  1. The relationship between student and faculty attitudes toward computer technology in advanced arts classes

    Microsoft Academic Search

    Virginia Donnell

    2004-01-01

    This study examined the relationship between faculty attitudes toward computer technology and student attitudes toward computer technology in advanced arts classes at Middle Tennessee State University during spring semester 2004. This study was focused on the disciplines of art, dance, music, and theatre, and was limited to faculty and students engaged in the 3000 and 4000 level classes. The Computer

  2. The Diffusion of Computer-Based Technology in K-12 Schools: Teachers' Perspectives

    ERIC Educational Resources Information Center

    Colandrea, John Louis

    2012-01-01

    Because computer technology represents a major financial outlay for school districts and is an efficient method of preparing and delivering lessons, studying the process of teacher adoption of computer use is beneficial and adds to the current body of knowledge. Because the teacher is the ultimate user of computer technology for lesson preparation…

  3. 25 CFR 502.7 - Electronic, computer or other technologic aid.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...a) Electronic, computer or other technologic...the playing of a game; (2) Is not...b) Electronic, computer or other technologic...levels in a common game; (2) Facilitate...player to play a game with or against...Examples of electronic, computer or other...

  4. 25 CFR 502.7 - Electronic, computer or other technologic aid.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...a) Electronic, computer or other technologic...the playing of a game; (2) Is not...b) Electronic, computer or other technologic...levels in a common game; (2) Facilitate...player to play a game with or against...Examples of electronic, computer or other...

  5. Pairing induced superconductivity in holography

    NASA Astrophysics Data System (ADS)

    Bagrov, Andrey; Meszena, Balazs; Schalm, Koenraad

    2014-09-01

    We study pairing induced superconductivity in large N strongly coupled systems at finite density using holography. In the weakly coupled dual gravitational theory the mechanism is conventional BCS theory. An IR hard wall cut-off is included to ensure that we can controllably address the dynamics of a single confined Fermi surface. We address in detail the interplay between the scalar order parameter field and fermion pairing. Adding an explicitly dynamical scalar operator with the same quantum numbers as the fermion-pair, the theory experiences a BCS/BEC crossover controlled by the relative scaling dimensions. We find the novel result that this BCS/BEC crossover exposes resonances in the canonical expectation value of the scalar operator. This occurs not only when the scaling dimension is degenerate with the Cooper pair, but also with that of higher derivative paired operators. We speculate that a proper definition of the order parameter which takes mixing with these operators into account stays finite nevertheless.

  6. DSS-24 microwave holography measurements

    NASA Technical Reports Server (NTRS)

    Rochblatt, D. J.; Withington, P. M.; Jackson, H. J.

    1995-01-01

    The JPL DSN Microwave Antenna Holography System (MAHST) was applied to the newly constructed DSS-24 34-m beam-waveguide antenna at Goldstone, California. The application of MAHST measurements and corrections at DSS 24 provided the critical RF performance necessary to not only meet the project requirements and goals, but to surpass them. A performance increase of 0.35 dB at X-band (8.45 GHz) and 4.9 dB at Ka-band (32 GHz) was provided by MAHST, resulting in peak efficiencies of 75.25 percent at X-band and 60.6 percent at Ka-band (measured from the Cassegrain focus at f1). The MAHST enabled setting the main reflector panels of DSS 24 to 0.25-mm rms, making DSS 24 the highest precision antenna in the NASA/JPL DSN. The precision of the DSS-24 antenna (diameter/rms) is 1.36 x 10(exp 5), and its gain limit is at 95 GHz.

  7. Reviews of computing technology: A review of compound document architectures

    SciTech Connect

    Hudson, B.J.

    1991-10-01

    This review of computing technology will define, describe, and give examples of various approaches to document management through the use of compound document architectures. Experts agree that only 10% of business information exists in machine readable form, but much of what is stored is not in useful form. As a result, the average business document is copied over a dozen times during its life and duplicate copies are stored in numerous locations. The goal of compound document architectures is to provide an information support environment where rapid access to the correct information in the proper format is simplified. A compound document architecture provides structure to seemingly unstructured electronic documents, and standardizes the methods for interchange and access of entire or partial documents by authors and users.

  8. Application Specific Performance Technology for Productive Parallel Computing

    SciTech Connect

    Allen D. Malony; Sameer Shende

    2008-10-01

    Our accomplishments over the last three years of the DOE pro ject â??Application-Specific Perfor- mance Technology for Productive Parallel Computingâ? (DOE Agreement: DE-FG02-05ER25680) are described below. The pro ject will have met all of its ob jectives by the time of its completion at the end of September, 2008. Two extensive yearly progress reports were produced in in March 2006 and 2007 and were previously submitted to the DOE Oï¬?ce of Advanced Scientific Computing Research (OASCR). Following an overview of the ob jectives of the pro ject, we summarize for each of the pro ject areas the achievements in the first two years, and then describe in some more detail the pro ject accomplishments this past year. At the end, we discuss the relationship of the proposed renewal application to the work done on the current pro ject.

  9. The Utah Educational Technology Initiative Year Two Evaluation: Program Implementation, Computer Acquisition and Placement, and Computer Use.

    ERIC Educational Resources Information Center

    Mergendoller, John R.; And Others

    This evaluation report describes program implementation, computer acquisition and placement, and computer use during the second year (1991-92) of the Utah Educational Technology Initiative (ETI). In addition, it discusses the various ways computers are used in Utah schools and reports the opinions and experiences of ETI coordinators in the 12…

  10. Synthetic optical holography for rapid nanoimaging.

    PubMed

    Schnell, M; Carney, P S; Hillenbrand, R

    2014-01-01

    Holography has paved the way for phase imaging in a variety of wide-field techniques, including electron, X-ray and optical microscopy. In scanning optical microscopy, however, the serial fashion of image acquisition seems to challenge a direct implementation of traditional holography. Here we introduce synthetic optical holography (SOH) for quantitative phase-resolved imaging in scanning optical microscopy. It uniquely combines fast phase imaging, technical simplicity and simultaneous operation at visible and infrared frequencies with a single reference arm. We demonstrate SOH with a scattering-type scanning near-field optical microscope (s-SNOM) where it enables reliable quantitative phase-resolved near-field imaging with unprecedented speed. We apply these capabilities to nanoscale, non-invasive and rapid screening of grain boundaries in CVD-grown graphene, by recording 65 kilopixel near-field images in 26?s and 2.3 megapixel images in 13?min. Beyond s-SNOM, the SOH concept could boost the implementation of holography in other scanning imaging applications such as confocal microscopy. PMID:24651276

  11. Synthetic optical holography for rapid nanoimaging

    NASA Astrophysics Data System (ADS)

    Schnell, M.; Carney, P. S.; Hillenbrand, R.

    2014-03-01

    Holography has paved the way for phase imaging in a variety of wide-field techniques, including electron, X-ray and optical microscopy. In scanning optical microscopy, however, the serial fashion of image acquisition seems to challenge a direct implementation of traditional holography. Here we introduce synthetic optical holography (SOH) for quantitative phase-resolved imaging in scanning optical microscopy. It uniquely combines fast phase imaging, technical simplicity and simultaneous operation at visible and infrared frequencies with a single reference arm. We demonstrate SOH with a scattering-type scanning near-field optical microscope (s-SNOM) where it enables reliable quantitative phase-resolved near-field imaging with unprecedented speed. We apply these capabilities to nanoscale, non-invasive and rapid screening of grain boundaries in CVD-grown graphene, by recording 65 kilopixel near-field images in 26?s and 2.3 megapixel images in 13?min. Beyond s-SNOM, the SOH concept could boost the implementation of holography in other scanning imaging applications such as confocal microscopy.

  12. Not All Created Equal: Individual-Technology Fit of Brain-Computer Interfaces

    Microsoft Academic Search

    Adriane B. Randolph

    2012-01-01

    This work presents a model stemming from literature on task-technology fit that seeks to match individual user characteristics and features of brain-computer interface technologies with performance to expedite the technology-fit process. The individual-technology fit model is tested with a brain-computer interface based on a control signal called the mu rhythm that is recorded from the motor cortex region. Characteristics from

  13. Ultrasonic Imaging of Subsurface Objects Using Photorefractive Dynamic Holography

    SciTech Connect

    Deason, Vance Albert; Telschow, Kenneth Louis; Watson, Scott Marshall

    2001-07-01

    The INEEL has developed a photorefractive ultrasonic imaging technology that records both phase and amplitude of ultrasonic waves on the surface of solids. Phase locked dynamic holography provides full field images of these waves scattered from subsurface defects in solids, and these data are compared with theoretical predictions. Laser light reflected by a vibrating surface is imaged into a photorefractive material where it is mixed in a heterodyne technique with a reference wave. This demodulates the data and provides an image of the ultrasonic waves in either 2 wave or 4 wave mixing mode. These data images are recorded at video frame rates and show phase locked traveling or resonant acoustic waves. This technique can be used over a broad range of ultrasonic frequencies. Acoustic frequencies from 2 kHz to 10 MHz have been imaged, and a point measuring (non-imaging) version of the system has measured picometer amplitudes at 1 GHz.

  14. COMPUTER & INFORMATION TECHNOLOGY L/R 590. Programming Languages and Techniques. (C)

    E-print Network

    Fang-Yen, Christopher

    COMPUTER & INFORMATION TECHNOLOGY (EG) {CIT} L/R 590. Programming Languages and Techniques. (C) Introduction to fundamental concepts of programming and computer science for students who have little not have an academic background in computer science and who are not pursuing the Master's in Computer

  15. Leonardo's laptop: human needs and the new computing technologies

    Microsoft Academic Search

    Ben Shneiderman

    2005-01-01

    The old computing was about what computers could do; the new computing is about what people can do.To accelerate the shift from the old to the new computing designers need to:reduce computer user frustration. Recent studies show 46% of time is lost to crashes, confusing instructions, navigation problems, etc. Public pressure for change could promote design improvements and increase reliability,

  16. Page 1 of 4 Michigan Technological University Computer Use Policy

    E-print Network

    's computers and networks for non-MTU-related business purposes or personal gain without authorization access to computers, computer systems, and computer networks for certain fraudulent purposes; to prohibit individual prior to any activity that might threaten the security or performance of University computers

  17. The Impact of Computer Technology on Schools in Chile.

    ERIC Educational Resources Information Center

    Oteiza, Fidel L.

    1993-01-01

    Examines the impact of computers on Chilean education. Topics discussed include the Chilean educational system; the integration of computers in private schools; leadership; and results of a survey that characterized the use of computers in 1,604 schools, including socioeconomic levels of students, types of computers and software, and computer…

  18. Computer vision challenges and technologies for agile manufacturing

    NASA Astrophysics Data System (ADS)

    Molley, Perry A.

    1996-02-01

    Sandia National Laboratories, a Department of Energy laboratory, is responsible for maintaining the safety, security, reliability, and availability of the nuclear weapons stockpile for the United States. Because of the changing national and global political climates and inevitable budget cuts, Sandia is changing the methods and processes it has traditionally used in the product realization cycle for weapon components. Because of the increasing age of the nuclear stockpile, it is certain that the reliability of these weapons will degrade with time unless eventual action is taken to repair, requalify, or renew them. Furthermore, due to the downsizing of the DOE weapons production sites and loss of technical personnel, the new product realization process is being focused on developing and deploying advanced automation technologies in order to maintain the capability for producing new components. The goal of Sandia's technology development program is to create a product realization environment that is cost effective, has improved quality and reduced cycle time for small lot sizes. The new environment will rely less on the expertise of humans and more on intelligent systems and automation to perform the production processes. The systems will be robust in order to provide maximum flexibility and responsiveness for rapidly changing component or product mixes. An integrated enterprise will allow ready access to and use of information for effective and efficient product and process design. Concurrent engineering methods will allow a speedup of the product realization cycle, reduce costs, and dramatically lessen the dependency on creating and testing physical prototypes. Virtual manufacturing will allow production processes to be designed, integrated, and programed off-line before a piece of hardware ever moves. The overriding goal is to be able to build a large variety of new weapons parts on short notice. Many of these technologies that are being developed are also applicable to commercial production processes and applications. Computer vision will play a critical role in the new agile production environment for automation of processes such as inspection, assembly, welding, material dispensing and other process control tasks. Although there are many academic and commercial solutions that have been developed, none have had widespread adoption considering the huge potential number of applications that could benefit from this technology. The reason for this slow adoption is that the advantages of computer vision for automation can be a double-edged sword. The benefits can be lost if the vision system requires an inordinate amount of time for reprogramming by a skilled operator to account for different parts, changes in lighting conditions, background clutter, changes in optics, etc. Commercially available solutions typically require an operator to manually program the vision system with features used for the recognition. In a recent survey, we asked a number of commercial manufacturers and machine vision companies the question, 'What prevents machine vision systems from being more useful in factories?' The number one (and unanimous) response was that vision systems require too much skill to set up and program to be cost effective.

  19. Software Holography: Interferometric Data Analysis for the Challenges of Next Generation Observatories

    E-print Network

    Miguel F. Morales; Michael Matejek

    2008-10-28

    Next generation radio observatories such as the MWA, LWA, LOFAR, CARMA and SKA provide a number of challenges for interferometric data analysis. These challenges include heterogeneous arrays, direction-dependent instrumental gain, and refractive and scintillating atmospheric conditions. From the analysis perspective, this means that calibration solutions can not be described using a single complex gain per antenna. In this paper we use the optimal map-making formalism developed for CMB analyses to extend traditional interferometric radio analysis techniques--removing the assumption of a single complex gain per antenna and allowing more complete descriptions of the instrumental and atmospheric conditions. Due to the similarity with holographic mapping of radio antenna surfaces, we call this extended analysis approach software holography. The resulting analysis algorithms are computationally efficient, unbiased, and optimally sensitive. We show how software holography can be used to solve some of the challenges of next generation observations, and how more familiar analysis techniques can be derived as limiting cases.

  20. Automatic Measurement Of Deformations Of Curved Surface Using Carrier-Holography

    NASA Astrophysics Data System (ADS)

    Zhu, Xu; Ke, Jiang; Yuzhuo, Chen; Bao-he, Zhang

    1988-12-01

    The present paper proposed a complete method to obtian whole-field displacements information at the curved surface of a body by using carrier-holography and rasterstereography. In the carrier-holography,the fringe pattern of interferogram consists of two parts. Ons is the displacement due to surface deformation, another is a straight fringe family with equal pitch produced by artificality and rigid body moving (if exist). the components of a displacement at every point are given from demodulating carrier-isothetics pattern by means of image processing. The space curvatures of a curved sueface are measured by the resterstereograph method. All the procedure from collecting image to printing result are completed automatically by a personal computer. For example, a model of a hyperboloidal arch dam is nonuniform heated,the thermal displacements on the arch suface are measured.

  1. Reviews of computing technology: Fiber distributed data interface. Revision

    SciTech Connect

    Johnson, A.J.

    1992-04-01

    This technology report describes Fiber Distributed Data Interface (FDDI) as a technology, looks at the applications of this technology, examines the current economics of using it, and describe activities and plans by the Information Resource Management Department to implement this technology at the Savannah River Site.

  2. Reviews of computing technology: Fiber distributed data interface

    SciTech Connect

    Johnson, A.J.

    1992-04-01

    This technology report describes Fiber Distributed Data Interface (FDDI) as a technology, looks at the applications of this technology, examines the current economics of using it, and describe activities and plans by the Information Resource Management Department to implement this technology at the Savannah River Site.

  3. Brain–Computer Interface Technologies in the Coming Decades

    Microsoft Academic Search

    Brent J. Lance; Scott E. Kerick; Anthony J. Ries; Kelvin S. Oie; Kaleb McDowell

    2012-01-01

    As the proliferation of technology dramatically infiltrates all aspects of modern life, in many ways the world is becoming so dynamic and complex that technological capabilities are overwhelming human capabilities to optimally interact with and leverage those technologies. Fortunately, these technological advancements have also driven an explosion of neuroscience research over the past several decades, presenting engineers with a remarkable

  4. Student use of Mobile TechnologyStudent use of Mobile TechnologyStudent use of Mobile TechnologyStudent use of Mobile Technology In CiCS (Corporate Information and Computing Services) we are always looking to improve our services.

    E-print Network

    Martin, Stephen John

    TechnologyStudent use of Mobile Technology In CiCS (Corporate Information and Computing Services) wePage 1 Student use of Mobile TechnologyStudent use of Mobile TechnologyStudent use of Mobile are always looking to improve our services. We are interested in your use of mobile technology (phones

  5. Predicting Cloud Computing Technology Adoption by Organizations: An Empirical Integration of Technology Acceptance Model and Theory of Planned Behavior

    ERIC Educational Resources Information Center

    Ekufu, ThankGod K.

    2012-01-01

    Organizations are finding it difficult in today's economy to implement the vast information technology infrastructure required to effectively conduct their business operations. Despite the fact that some of these organizations are leveraging on the computational powers and the cost-saving benefits of computing on the Internet cloud, others…

  6. The Role of Computer Technology in Teaching Reading and Writing: Preschool Teachers' Beliefs and Practices

    Microsoft Academic Search

    Fathi Ihmeideh

    2009-01-01

    This study investigated preschool teachers' beliefs and practices regarding the use of computer technology in teaching reading and writing in Jordan. The researcher developed a questionnaire consisting of two scales—Teachers' Beliefs Scale (TB Scale) and Teachers' Practices Scale (TP Scale)—to examine the role of computer technology in teaching reading and writing to preschoolers. A random sample of 154 preschool teachers

  7. The Role of Computer Technology in Teaching Reading and Writing: Preschool Teachers' Beliefs and Practices

    ERIC Educational Resources Information Center

    Ihmeideh, Fathi

    2010-01-01

    This study investigated preschool teachers' beliefs and practices regarding the use of computer technology in teaching reading and writing in Jordan. The researcher developed a questionnaire consisting of two scales--Teachers' Beliefs Scale (TB Scale) and Teachers' Practices Scale (TP Scale)--to examine the role of computer technology in teaching…

  8. A Quantitative Exploration of Preservice Teachers' Intent to Use Computer-based Technology

    ERIC Educational Resources Information Center

    Kim, Kioh; Jain, Sachin; Westhoff, Guy; Rezabek, Landra

    2008-01-01

    Based on Bandura's (1977) social learning theory, the purpose of this study is to identify the relationship of preservice teachers' perceptions of faculty modeling of computer-based technology and preservice teachers' intent of using computer-based technology in educational settings. There were 92 participants in this study; they were enrolled in…

  9. An Exploratory Study of the Implementation of Computer Technology in an American Islamic Private School

    ERIC Educational Resources Information Center

    Saleem, Mohammed M.

    2009-01-01

    This exploratory study of the implementation of computer technology in an American Islamic private school leveraged the case study methodology and ethnographic methods informed by symbolic interactionism and the framework of the Muslim Diaspora. The study focused on describing the implementation of computer technology and identifying the…

  10. Beginnings: Introducing Computer Technology to Students in Speech-Language Pathology and Audiology.

    ERIC Educational Resources Information Center

    McErlain, Eileen; Squibb, Kevin

    In the areas of audiology and speech science, computer technology has moved to the forefront in both the clinical and laboratory settings. It is imperative that students in both speech-language pathology and audiology acquire fundamental skills with all aspects of computer technology in order to maintain professional marketability. A survey of 75…

  11. A Meta-Analysis of Effectiveness Studies on Computer Technology-Supported Language Learning

    ERIC Educational Resources Information Center

    Grgurovic, Maja; Chapelle, Carol A.; Shelley, Mack C.

    2013-01-01

    With the aim of summarizing years of research comparing pedagogies for second/foreign language teaching supported with computer technology and pedagogy not-supported by computer technology, a meta-analysis was conducted of empirical research investigating language outcomes. Thirty-seven studies yielding 52 effect sizes were included, following a…

  12. The Use of Computer Software to Teach High Technology Skills to Vocational Students.

    ERIC Educational Resources Information Center

    Farmer, Edgar I.

    A study examined the type of computer software that is best suited to teach high technology skills to vocational students. During the study, 50 manufacturers of computer software and hardware were sent questionnaires designed to gather data concerning their recommendations in regard to: software to teach high technology skills to vocational…

  13. University Students and Ethics of Computer Technology Usage: Human Resource Development

    ERIC Educational Resources Information Center

    Iyadat, Waleed; Iyadat, Yousef; Ashour, Rateb; Khasawneh, Samer

    2012-01-01

    The primary purpose of this study was to determine the level of students' awareness about computer technology ethics at the Hashemite University in Jordan. A total of 180 university students participated in the study by completing the questionnaire designed by the researchers, named the Computer Technology Ethics Questionnaire (CTEQ). Results…

  14. Technion -Israel Institute of Technology Department of Computer Science

    E-print Network

    Kimmel, Ron

    surface matching. Week 8: multidimensional scaling, LS-MDS, SMACOF, multi-grid MDS. Week 9: non-Euclidean of mathematics and computer science such as differential and metric geometry, numerical analysis, optimization, computer graphics, machine learning, computer vision and computational geometry. The course objective

  15. Research for current cloud computing and cloud security technology

    Microsoft Academic Search

    Chen Hongsong; Fu Zhongchuan

    2010-01-01

    This paper introduces the concept, development, key features, applications of cloud computing. The difference to grid computing is discussed. Eight kinds of typical open source cloud computing projects are described, the security reference models of cloud services are given. Cloud computing security challenges and countermeasures are discussed in this paper.

  16. Dental Student Experience and Perceptions of Computer Technology.

    ERIC Educational Resources Information Center

    Feldman, Cecile A.

    1992-01-01

    A survey of 180 dental students in 3 classes assessed student knowledge of computer-related topics and perceptions of the usefulness of computers in different areas of practice management. Computer ownership and use, computer-related courses taken, software types used, and student characteristics (age, sex, academic achievement, undergraduate…

  17. An Empirical Investigation of the Relationshops Among Math Confidence, Computer Confidence and Computer Self-Efficacy: Implications for Technology Education

    Microsoft Academic Search

    Morris Jr. R. Franklin; Evelyn H. Thrasher

    2008-01-01

    A popular issue in the 1980’s and early 1990’s, computer self-efficacy (CSE) remains an important area of research. Educators, industry leaders, and government officials argue that the United States is falling behind other countries in technology innovation. And, most attribute this situation to ineffective education in the areas of math, science, and technology. The current study provides insight into these

  18. Social Studies: Application Units. Course II, Teachers. Computer-Oriented Curriculum. REACT (Relevant Educational Applications of Computer Technology).

    ERIC Educational Resources Information Center

    Tecnica Education Corp., San Carlos, CA.

    This book is one of a series in Course II of the Relevant Educational Applications of Computer Technology (REACT) Project. It is designed to point out to teachers two of the major applications of computers in the social sciences: simulation and data analysis. The first section contains a variety of simulation units organized under the following…

  19. Preparing for Further Introduction of Computing Technology in Vancouver Community College Instruction. Report of the Instructional Computing Committee.

    ERIC Educational Resources Information Center

    Vancouver Community Coll., British Columbia.

    After examining the impact of changing technology on postsecondary instruction and on the tools needed for instruction, this report analyzes the status and offers recommendations concerning the future of instructional computing at Vancouver Community College (VCC) in British Columbia. Section I focuses on the use of computers in community college…

  20. Technology in Spiritual Formation: An Exploratory Study of Computer Mediated Religious Communications

    E-print Network

    Hayes, Gillian R.

    Technology in Spiritual Formation: An Exploratory Study of Computer Mediated Religious of Technology 85 Fifth Street NW Atlanta Georgia 30308 {spwyche, gillian, beki}@cc.gatech.edu *Georgia Gwinnett report findings from a study of American Christian ministers' uses of technologies in religious practices

  1. Does technological performance gap drive product performance?: An explorative study of personal computer gaming

    Microsoft Academic Search

    O. Dedehayir; S. J. Makinen

    2008-01-01

    In this paper we firstly develop a means to measure the technological performance disparity between evolving technological sub-systems of the PC (personal computer) system and subsequently employ this measure in the study of the GPU (graphics processing unit) and PC game sub-systems¿ evolutions. Secondly, the paper explores the connection between the observed temporal behavior of technological performance gap and the

  2. A Forecast for Technology and Education: The Report of a Computer Conferencing Delphi.

    ERIC Educational Resources Information Center

    Waggoner, Michael D.; Goldberg, Albert L.

    1986-01-01

    This report on an application of the Delphi methodology to education and technology in the context of a Michigan project highlights findings related to: instructional material development; courseware; budgets and teachers; computer literacy; technology access and use; utilization barriers; impact; organizational adaptation; technology integration;…

  3. Updated: 10/8/08 Sound Recording Technology Minor for Electrical and Computer Engineering Students

    E-print Network

    Massachusetts at Lowell, University of

    Updated: 10/8/08 Sound Recording Technology Minor for Electrical and Computer Engineering Students This supportive minor in sound recording technology is for electrical engineering majors only. Students with the coordinator of sound recording technology. The petition is to be filed after the completion of 71

  4. A Computer-Assisted Approach for Conducting Information Technology Applied Instructions

    ERIC Educational Resources Information Center

    Chu, Hui-Chun; Hwang, Gwo-Jen; Tsai, Pei Jin; Yang, Tzu-Chi

    2009-01-01

    The growing popularity of computer and network technologies has attracted researchers to investigate the strategies and the effects of information technology applied instructions. Previous research has not only demonstrated the benefits of applying information technologies to the learning process, but has also revealed the difficulty of applying…

  5. Manned space station environmental control and life support system computer-aided technology assessment program

    NASA Technical Reports Server (NTRS)

    Hall, J. B., Jr.; Pickett, S. J.; Sage, K. H.

    1984-01-01

    A computer program for assessing manned space station environmental control and life support systems technology is described. The methodology, mission model parameters, evaluation criteria, and data base for 17 candidate technologies for providing metabolic oxygen and water to the crew are discussed. Examples are presented which demonstrate the capability of the program to evaluate candidate technology options for evolving space station requirements.

  6. In the Clouds: The Implications of Cloud Computing for Higher Education Information Technology Governance and Decision Making

    ERIC Educational Resources Information Center

    Dulaney, Malik H.

    2013-01-01

    Emerging technologies challenge the management of information technology in organizations. Paradigm changing technologies, such as cloud computing, have the ability to reverse the norms in organizational management, decision making, and information technology governance. This study explores the effects of cloud computing on information technology…

  7. The Dialogic Classroom: Teachers Integrating Computer Technology, Pedagogy, and Research.

    ERIC Educational Resources Information Center

    Galin, Jeffrey R., Ed.; Latchaw, Joan, Ed.

    The 12 essays collected in this book suggest both practical and theoretical approaches to teaching through networked technologies. Moving beyond technology for its own sake, the book articulates a pedagogy which makes its own productive uses of emergent technologies, both inside and outside the classroom. The book models for students one possible…

  8. Desktop Technology for Newspapers: Use of the Computer Tool.

    ERIC Educational Resources Information Center

    Wilson, Howard Alan

    This work considers desktop publishing technology as a way used to paginate newspapers electronically, tracing the technology's development from the beginning of desktop publishing in the mid-1980s to the 1990s. The work emphasizes how desktop publishing technology is and can be used by weekly newspapers. It reports on a Pennsylvania weekly…

  9. Enhanced resolution and throughput of Fresnel incoherent correlation holography (FINCH)

    E-print Network

    Rosen, Joseph

    Enhanced resolution and throughput of Fresnel incoherent correlation holography (FINCH) using dual correlation holography (FINCH) records holograms under incoherent illumination. FINCH was implemented with two and light source bandwidth, FINCH with two lenses of close focal lengths yields a better hologram

  10. Vibration motions studied by Heterodyne Holography , F. Verpillat1

    E-print Network

    Paris-Sud XI, Université de

    Vibration motions studied by Heterodyne Holography F. Joud1 , F. Verpillat1 , P.A. Taillard2 , M and signal arms, heterodyne holography is well adapted to vibration analysis. Vibration sidebands can. Gross, F. Joud, M. Atlan, P. Taillard, F. Verpillat, and N. Verrier, "Vibration motions studied

  11. Negative magnetoresistivity in chiral fluids and holography

    E-print Network

    Landsteiner, Karl; Sun, Ya-Wen

    2014-01-01

    In four dimensions Weyl fermions possess a chiral anomaly which leads to several special features in the transport phenomena, such as the negative longitudinal magnetoresistivity. In this paper, we study its inverse, the longitudinal magnetoconductivity, in the case of a chiral anomalous system with a background magnetic field B using the linear response method in the hydrodynamic limit and from holography. Our hydrodynamic results show that in general we need to have energy, momentum and charge dissipations to get a finite DC longitudinal magnetoconductivity due to the existence of the chiral anomaly. Applying the formula that we get from hydrodynamics to the holographic system in the probe limit, we find that the result in the hydrodynamic regime matches that calculated from holography via Kubo formula. The holographic result shows that in an intermediate regime of B there is naturally a negative magnetoresistivity which decreases as 1/B. At small B direct calculations in the holographic system suggest that...

  12. The Relationship Between Perceived Stress and Computer Technology Attitude: an Application on Health Sciences Students

    PubMed Central

    Ozyurek, Pakize; Oztasan, Nuray; Kilic, Ibrahim

    2015-01-01

    Introduction: The aim of this study is to define attitudes of students in health sciences towards perceived personal stress and computer technologies, and to present the relationship between stress and computer technology attitudes. Methods: In this scope, this study has a descriptive nature and thus a questionnaire has been applied on 764 students from Afyon Kocatepe University Health Sciences High School, Turkey for data gathering. Descriptive statistics, independent samples, t test, one way ANOVA, and regression analysis have been used for data analysis. Findings: In the study, it is seen that female (=3,78) have a more positive attitude towards computer technology than male students (=3,62). according to the results of regression analysis of the study, the regression model between computer technology attitude (CTA) and perceived stress (PS) has been found meaningful (F=16,291; p<0,005). There was a negative relationship between computer technology attitude and perceived stress (when computer technology altitude increases, perceived stress decreases), and an increase of one unit in computer attitude results in 0.275 decrease in perceived stress. Conclusions: it can be concluded that correct and proper use of computer technologies can be accepted as a component of overcoming stress methods. PMID:25870489

  13. Experimental imaging research on continuous-wave terahertz in-line digital holography

    NASA Astrophysics Data System (ADS)

    Huang, Haochong; Wang, Dayong; Rong, Lu; Wang, Yunxin

    2014-09-01

    The terahertz (THz) imaging is an advanced technique on the basis of the unique characteristics of terahertz radiation. Due to its noncontact, non-invasive and high-resolution capabilities, it has already shown great application prospects in biomedical observation, sample measurement, and quality control. The continuous-wave terahertz in-line digital holography is a combination of terahertz technology and in-line digital holography of which the source is a continuous-wave terahertz laser. Over the past decade, many researchers used different terahertz sources and detectors to undertake experiments. In this paper, the pre-process of the hologram is accomplished after the holograms' recording process because of the negative pixels in the pyroelectric detector and the air vibration caused by the chopper inside the camera. To improve the quality of images, the phase retrieval algorithm is applied to eliminate the twin images. In the experiment, the pin which terahertz wave can't penetrate and the TPX slice carved letters "THz" are chosen for the samples. The amplitude and phase images of samples are obtained and the twin image and noise in the reconstructed images are suppressed. The results validate the feasibility of the terahertz in-line digital holographic imaging technique. This work also shows the terahertz in-line digital holography technique's prospects in materials science and biological samples' detection.

  14. Functional holography analysis: Simplifying the complexity of dynamical networks

    SciTech Connect

    Baruchi, Itay; Grossman, Danny; Volman, Vladislav; Shein, Mark; Hunter, John; Towle, Vernon L.; Ben-Jacob, Eshel [School of Physics and Astronomy, Tel Aviv University, 69978 Tel Aviv (Israel); Department of Neurology, MC-2030, University of Chicago Hospitals, Chicago, Illinois 60637 (United States); School of Physics and Astronomy, Tel Aviv University, 69978 Tel Aviv (Israel); Center for Theoretical and Biological Physics, University of California San Diego, La Jolla, California 92093 (United States)

    2006-03-15

    We present a novel functional holography (FH) analysis devised to study the dynamics of task-performing dynamical networks. The latter term refers to networks composed of dynamical systems or elements, like gene networks or neural networks. The new approach is based on the realization that task-performing networks follow some underlying principles that are reflected in their activity. Therefore, the analysis is designed to decipher the existence of simple causal motives that are expected to be embedded in the observed complex activity of the networks under study. First we evaluate the matrix of similarities (correlations) between the activities of the network's components. We then perform collective normalization of the similarities (or affinity transformation) to construct a matrix of functional correlations. Using dimension reduction algorithms on the affinity matrix, the matrix is projected onto a principal three-dimensional space of the leading eigenvectors computed by the algorithm. To retrieve back information that is lost in the dimension reduction, we connect the nodes by colored lines that represent the level of the similarities to construct a holographic network in the principal space. Next we calculate the activity propagation in the network (temporal ordering) using different methods like temporal center of mass and cross correlations. The causal information is superimposed on the holographic network by coloring the nodes locations according to the temporal ordering of their activities. First, we illustrate the analysis for simple, artificially constructed examples. Then we demonstrate that by applying the FH analysis to modeled and real neural networks as well as recorded brain activity, hidden causal manifolds with simple yet characteristic geometrical and topological features are deciphered in the complex activity. The term 'functional holography' is used to indicate that the goal of the analysis is to extract the maximum amount of functional information about the dynamical network as a whole unit.

  15. Applications of optical holography to applied mechanics.

    NASA Technical Reports Server (NTRS)

    Aprahamian, R.

    1972-01-01

    This paper provides a brief summary of applications of optical holography and holographic interferometry to applied solid mechanics. Basic equations commonly used in fringe interpretation are described and used to reduce the data contained on holographic interferograms. A comparison of data obtained holographically with analytical prediction is given wherever possible. Applications contained herein include front surface physics, study of bomb breakup, transverse wave propagation, study of mode shapes of panels at elevated temperatures, nondestructive testing, and vibration analysis.

  16. Evaluation of computer-based ultrasonic inservice inspection systems

    SciTech Connect

    Harris, R.V. Jr.; Angel, L.J.; Doctor, S.R.; Park, W.R.; Schuster, G.J.; Taylor, T.T. [Pacific Northwest Lab., Richland, WA (United States)

    1994-03-01

    This report presents the principles, practices, terminology, and technology of computer-based ultrasonic testing for inservice inspection (UT/ISI) of nuclear power plants, with extensive use of drawings, diagrams, and LTT images. The presentation is technical but assumes limited specific knowledge of ultrasonics or computers. The report is divided into 9 sections covering conventional LTT, computer-based LTT, and evaluation methodology. Conventional LTT topics include coordinate axes, scanning, instrument operation, RF and video signals, and A-, B-, and C-scans. Computer-based topics include sampling, digitization, signal analysis, image presentation, SAFI, ultrasonic holography, transducer arrays, and data interpretation. An evaluation methodology for computer-based LTT/ISI systems is presented, including questions, detailed procedures, and test block designs. Brief evaluations of several computer-based LTT/ISI systems are given; supplementary volumes will provide detailed evaluations of selected systems.

  17. Models of Educational Computing @ Home: New Frontiers for Research on Technology in Learning.

    ERIC Educational Resources Information Center

    Kafai, Yasmin B.; Fishman, Barry J.; Bruckman, Amy S.; Rockman, Saul

    2002-01-01

    Discusses models of home educational computing that are linked to learning in school and recommends the need for research that addresses the home as a computer-based learning environment. Topics include a history of research on educational computing at home; technological infrastructure, including software and compatibility; Internet access;…

  18. Examining the Relationship between Technological, Organizational, and Environmental Factors and Cloud Computing Adoption

    ERIC Educational Resources Information Center

    Tweel, Abdeneaser

    2012-01-01

    High uncertainties related to cloud computing adoption may hinder IT managers from making solid decisions about adopting cloud computing. The problem addressed in this study was the lack of understanding of the relationship between factors related to the adoption of cloud computing and IT managers' interest in adopting this technology. In…

  19. Understanding the Critics of Educational Technology: Gender Inequities and Computers 1983-1993.

    ERIC Educational Resources Information Center

    Mangione, Melissa

    Although many view computers purely as technological tools to be utilized in the classroom and workplace, attention has been drawn to the social differences computers perpetuate, including those of race, class, and gender. This paper focuses on gender and computing by examining recent analyses in regards to content, form, and usage concerns. The…

  20. The Use of Computer Communication Technology in a College-Level Introductory Nutrition Course

    Microsoft Academic Search

    D. R. Paulhamus

    1998-01-01

    Computer communication applications such as electronic mail and the Internet are changing the field of education. However, the use of these applications is just emerging in nutrition education. Because computer technology has been reported to enhance the learning of college students, it is important to identify new strategies to incorporate this medium into the classroom.The use of a computer communication

  1. Holography and Art - Using rainbow hologram in my works

    NASA Astrophysics Data System (ADS)

    Cho, Duck Hee

    2013-02-01

    Holography can be understood as one of the more sophisticated subjects within the realm of modern art. Even after several years of study and application, understanding Holography simply does not get any easier. For that reason, instead of trying to discuss both the technical and the artistic aspects of holography, the emphasis will strictly be on the latter. Just like any other paradigm or medium capable of fascinating the human hearts, holography has changed the way I encounter the world. Changed perception of the world brought me feelings of child-like delight. Among the various subdivisions of holography, I hold Rainbow Hologram exceptionally close to my heart. Not only is it related to my previous works but its bright, crisp and various color movements are also depicted wonderfully in 3-dimension. I would like to share my fascination with rainbow hologram with you.

  2. Electron holography of devices with epitaxial layers

    SciTech Connect

    Gribelyuk, M. A., E-mail: Michael.gribelyuk@globalfoundries.com; Ontalus, V.; Baumann, F. H.; Zhu, Z.; Holt, J. R. [IBM Systems and Technology Group, Hopewell Junction, New York 12533 (United States)

    2014-11-07

    Applicability of electron holography to deep submicron Si devices with epitaxial layers is limited due to lack of the mean inner potential data and effects of the sample tilt. The mean inner potential V{sub 0}?=?12.75?V of the intrinsic epitaxial SiGe was measured by electron holography in devices with Ge content C{sub Ge}?=?18%. Nanobeam electron diffraction analysis performed on the same device structure showed that SiGe is strain-free in [220] direction. Our results showed good correlation with simulations of the mean inner potential of the strain-free SiGe using density function theory. A new method is proposed in this paper to correct electron holography data for the overlap of potentials of Si and the epitaxial layer, which is caused by the sample tilt. The method was applied to the analysis of the dopant diffusion in p-Field-effect Transistor devices with the identical gate length L?=?30?nm, which had alternative SiGe geometry in the source and drain regions and was subjected to different thermal processing. Results have helped to understand electrical data acquired from the same devices in terms of dopant diffusion.

  3. Aberration compensation in lensless digital holography

    NASA Astrophysics Data System (ADS)

    Yao, Ping; Yu, Hua

    2014-12-01

    Lensless digital holography could improve the resolution of digital holography reconstruction and has drawn wide attention. The complex wave-front could be reconstructed through Fourier transformation of a single hologram. It's crucial to reconstruct the phase precisely. However the phase constructed from a single hologram usually contains a quadratic aberration. Many methods are proposed to remove the item. In this paper the method of lateral shearing interferometry is studied to compensate the quadratic aberration. First we show the aberration in lensless digital holography and the lateral shearing interferometry. Then numerical simulations are carried out to test the method. It can be concluded that the method of linear fitting could effectively extract the quadratic aberration. The drawback is that the quadratic phase information extracted could not discern the additional aberration and the quadratic item included by the object wave field. A small local smooth area couldn't guarantee good estimation of quadratic aberrations. A larger area could get better results even in the presence of noises. However the aberration compensation depends greatly on noises. The reason of larger residual aberrations in the presence of noises is that noises influence greatly on the phase reconstruction including unwrapping.

  4. Negative magnetoresistivity in chiral fluids and holography

    E-print Network

    Karl Landsteiner; Yan Liu; Ya-Wen Sun

    2015-03-03

    In four dimensions Weyl fermions possess a chiral anomaly which leads to several special features in the transport phenomena, such as the negative longitudinal magnetoresistivity. In this paper, we study its inverse, the longitudinal magnetoconductivity, in the case of a chiral anomalous system with a background magnetic field B using the linear response method in the hydrodynamic limit and from holography. Our hydrodynamic results show that in general we need to have energy, momentum and charge dissipations to get a finite DC longitudinal magnetoconductivity due to the existence of the chiral anomaly. Applying the formula that we get from hydrodynamics to the holographic system in the probe limit, we find that the result in the hydrodynamic regime matches that calculated from holography via Kubo formula. The holographic result shows that in an intermediate regime of B there is naturally a negative magnetoresistivity which decreases as 1/B. At small B direct calculations in the holographic system suggest that holography provides a new explanation for the small B positive magnetoresistivity behavior seen in experiment, i.e. the small B behavior comes from the quantum critical conductivity being affected by the chiral anomaly.

  5. Acoustic Holography of the Solar Convection Zone with SOHO-MDI Observations

    NASA Technical Reports Server (NTRS)

    Lindsey, Charles

    2005-01-01

    The original grant with the title stated above was NAG5-10984, awarded to the Solar Physics Research Corporation (SPRC) in July, 2001, and was to be a three-year project. The basic theme of the project was the development and application of computational seismic holography for imaging, diagnostics, and monitoring of magnetic anomalies beneath active regions, in the deep solar interior, and on the Sun's far surface. The project was roughly separated into the following five tasks: (1) A holographic survey of active regions. (2) p-Mode absorption diagnostics of magnetic regions. (3) Acoustic modeling of the shallow subphotospheres of active regions and the quiet-Sun supergranulation based on phase-correlation seismic holography. (4) Seismic holography of the deep convection zone. (5) Improvements in holographic imaging of the far surface of the Sun. Following the death of Karen Harvey, President of SPRC, during the first year, the grant was transferred to Northwest Research Associates as NAG5-12901. Substantial but progress had been made on most of the above tasks in the first year under NAG5-10984, but none were completed. This work was continued under NAG5-12901.

  6. Computer Programmed Milling Machine Operations. High-Technology Training Module.

    ERIC Educational Resources Information Center

    Leonard, Dennis

    This learning module for a high school metals and manufacturing course is designed to introduce the concept of computer-assisted machining (CAM). Through it, students learn how to set up and put data into the controller to machine a part. They also become familiar with computer-aided manufacturing and learn the advantages of computer numerical…

  7. Making Advanced Computer Science Topics More Accessible through Interactive Technologies

    ERIC Educational Resources Information Center

    Shao, Kun; Maher, Peter

    2012-01-01

    Purpose: Teaching advanced technical concepts in a computer science program to students of different technical backgrounds presents many challenges. The purpose of this paper is to present a detailed experimental pedagogy in teaching advanced computer science topics, such as computer networking, telecommunications and data structures using…

  8. The application of microprocessor technology to in-flight computation

    NASA Technical Reports Server (NTRS)

    Sawyer, P. L.; Somers, D. M.

    1979-01-01

    A modular design of a general purpose microprocessor-based computer to perform in-flight computations for cross-country soaring pilots is described. The basic requirements for the system are discussed. Several specialized applications of the computer are presented, including real-time pilot feedback and flight-test data acquisition and reduction.

  9. Interact, play, explore -by means of interactive computer game technologies!

    E-print Network

    Cengarle, María Victoria

    for problem-solving, education and training as well as movie entertainment. Informatics: Games Engineering games engineering requires profound knowledge of the foundations of computer science, good programming, a bachelor's degree in Informatics: Games Engineering, computer science, or a similar computer-related field

  10. Fascinating Technology: Computer Games as an Issue for Religious Education

    ERIC Educational Resources Information Center

    Scholtz, Christopher P.

    2005-01-01

    Computer games as an important part of youth culture can, from a certain perspective, be highly relevant for religious education. I will review the role of computer games, and then give a brief overview, suggesting a specific phenomenological approach for research on computer games and religious education. After presenting one example of such…

  11. Cloud Computing: A Free Technology Option to Promote Collaborative Learning

    ERIC Educational Resources Information Center

    Siegle, Del

    2010-01-01

    In a time of budget cuts and limited funding, purchasing and installing the latest software on classroom computers can be prohibitive for schools. Many educators are unaware that a variety of free software options exist, and some of them do not actually require installing software on the user's computer. One such option is cloud computing. This…

  12. Spin-transfer torque magnetoresistive random-access memory technologies for normally off computing (invited)

    SciTech Connect

    Ando, K., E-mail: ando-koji@aist.go.jp; Yuasa, S. [National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8568 (Japan); Fujita, S.; Ito, J.; Yoda, H. [Toshiba Corporation, Kawasaki 212-8582 (Japan); Suzuki, Y. [Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531 (Japan); Nakatani, Y. [Department of Communication Engineering and Informatics, University of Electro-Communication, Chofu 182-8585 (Japan); Miyazaki, T. [WPI-AIMR, Tohoku University, Sendai 980-8577 (Japan)

    2014-05-07

    Most parts of present computer systems are made of volatile devices, and the power to supply them to avoid information loss causes huge energy losses. We can eliminate this meaningless energy loss by utilizing the non-volatile function of advanced spin-transfer torque magnetoresistive random-access memory (STT-MRAM) technology and create a new type of computer, i.e., normally off computers. Critical tasks to achieve normally off computers are implementations of STT-MRAM technologies in the main memory and low-level cache memories. STT-MRAM technology for applications to the main memory has been successfully developed by using perpendicular STT-MRAMs, and faster STT-MRAM technologies for applications to the cache memory are now being developed. The present status of STT-MRAMs and challenges that remain for normally off computers are discussed.

  13. Computer architectures for computational physics work done by Computational Research and Technology Branch and Advanced Computational Concepts Group

    NASA Technical Reports Server (NTRS)

    1985-01-01

    Slides are reproduced that describe the importance of having high performance number crunching and graphics capability. They also indicate the types of research and development underway at Ames Research Center to ensure that, in the near term, Ames is a smart buyer and user, and in the long-term that Ames knows the best possible solutions for number crunching and graphics needs. The drivers for this research are real computational physics applications of interest to Ames and NASA. They are concerned with how to map the applications, and how to maximize the physics learned from the results of the calculations. The computer graphics activities are aimed at getting maximum information from the three-dimensional calculations by using the real time manipulation of three-dimensional data on the Silicon Graphics workstation. Work is underway on new algorithms that will permit the display of experimental results that are sparse and random, the same way that the dense and regular computed results are displayed.

  14. Workshop on Computer Science and Information Technologies CSIT'2002, Patras, Greece, 2002 Intelligent Educational Systems for Individualized Learning

    E-print Network

    Workshop on Computer Science and Information Technologies CSIT'2002, Patras, Greece, 2002. Proceedings of the 4th International Workshop on Computer Science and Information Technologies CSIT'2002 information concerning the user, (c) the pedagogical model which #12;Intelligent Educational Systems

  15. A review of the commercial brain-computer interface technology from perspective of industrial robotics

    Microsoft Academic Search

    Biao Zhang; Jianjun Wang; Thomas Fuhlbrigge

    2010-01-01

    Research on brain-computer interface (BCI) began in the 1970s. Great efforts in neuroscience, robotics and computer sciences have spent by many research groups to develop BCI technologies and its applications. Recently, the commercial brain-computer interface devices are emerging in gaming industry. These devices translate the electrical biosignals of a brain directly into computer commands and take advantage of total immersion

  16. STEM-Based Computational Modeling for Technology Education

    ERIC Educational Resources Information Center

    Clark, Aaron C.; Ernst, Jeremy V.

    2008-01-01

    According to professionals in education, change is an ever-present and evolving process. With transformation in education at both state and national levels, technology education must determine a position in this climate of change. This paper reflects the views on the future of technology education based on an ongoing research project. The purpose…

  17. Computers & Technology in School Library Media Centers. Professional Growth Series.

    ERIC Educational Resources Information Center

    Bucher, Katherine Toth

    Technology is arriving in school libraries in unprecedented quantities, resulting in many changes in the school library media center. While most librarians agree that technology is wonderful, many are feeling the stress of rapid change and coping with the decisions made by educational policy makers. This looseleaf notebook, written for the novice,…

  18. NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY/ NATIONAL COMPUTER SECURITY CENTER

    E-print Network

    National Bank Virgil Gibson GrumannData Systems Dennis Gilbert National Institute of Standards and Technology Irene Gilbert National Institute of Standards and Technology Captain James Goldston, USAF AFCSC Dr. Carl Landwehr Robert lau Dr. Theodore M.P. lee Steven B. lipner Teresa lunt Dr. William V

  19. Architectures, Concepts and Technologies for Service Oriented Computing : Proceedings of the 2nd International Workshop on Architectures, Concepts and Technologies for Service Oriented Computing - ACT4SOC 2008

    Microsoft Academic Search

    Sinderen van Marten

    2008-01-01

    This volume contains the proceedings of the Second International Workshop on Architectures, Concepts and Technologies for Service Oriented Computing (ACT4SOC 2008), held on July 5 in Porto, Portugal, in conjunction with the Third International Conference on Software and Data Technologies (ICSOFT 2008).\\u000aThe ACT4SOC workshop aims at serving as a forum for researchers and practitioners, from academia and industry, to

  20. A promising future of computing for geospatial technologies

    Microsoft Academic Search

    Lindi Liao

    2012-01-01

    The explosion of the power and sophistication of computing applications in the past few years has revolutionized the way we live and work. This marked trend is of especial significance for geospatial computing, which directly relates to the very foundations of our society and essentially embraces all the diversification of its activities. Geospatial information, already important in many scientific and

  1. Science and Technology Resources on the Internet: Computer Security.

    ERIC Educational Resources Information Center

    Kinkus, Jane F.

    2002-01-01

    Discusses issues related to computer security, including confidentiality, integrity, and authentication or availability; and presents a selected list of Web sites that cover the basic issues of computer security under subject headings that include ethics, privacy, kids, antivirus, policies, cryptography, operating system security, and biometrics.…

  2. E-science meets computational science and information technology

    Microsoft Academic Search

    G. Fox

    2002-01-01

    Over the last decade or so, there has been much discussion of and progress in computational science. The US High Performance Computing and Communications Initiative and the National Science Foundation (NSF) grand challenge programs largely focused on this trend. Now the NSF has a new cyber infrastructure report continuing the same emphasis on distributed systems. The author looks at the

  3. Strategies for Introducing Computer Technologies into a Biology Laboratory Program

    ERIC Educational Resources Information Center

    Tillotson, Joanne Kivela

    2002-01-01

    Computers have been installed in the General Biology laboratory at Purchase College and incorporated into the laboratory curriculum for all biology majors at the introductory level. The goal is to ensure that all students become familiar with general computer applications in the biological sciences and are comfortable enough to use them regularly.…

  4. Internet and Computer Technology Hazards: Perspectives for Family Counselling.

    ERIC Educational Resources Information Center

    Oravec, Jo Ann

    2000-01-01

    Explores the social construction of the various computer hazards that households are encountering, such as computer addiction and children's access to on-line pornography. Discusses these issues in terms of constructivist counseling perspectives that are sensitive to cultural and environmental contexts. Outlines specific strategies for countering…

  5. Technological networks and the spread of computer viruses

    Microsoft Academic Search

    Justin Balthrop; Stephanie Forrest; Mark E. J. Newman; Matthew M. Williamson

    2004-01-01

    Computer infections such as viruses and worms spread over networks of con- tacts between computers, with different types of networks being exploited by different types of infections. Here we analyze the structures of several of these networks, exploring their implications for modes of spread and the control of infection. We argue that vaccination strategies that focus on a limited number

  6. Research on the application in disaster reduction for using cloud computing technology

    NASA Astrophysics Data System (ADS)

    Tao, Liang; Fan, Yida; Wang, Xingling

    Cloud Computing technology has been rapidly applied in different domains recently, promotes the progress of the domain's informatization. Based on the analysis of the state of application requirement in disaster reduction and combining the characteristics of Cloud Computing technology, we present the research on the application of Cloud Computing technology in disaster reduction. First of all, we give the architecture of disaster reduction cloud, which consists of disaster reduction infrastructure as a service (IAAS), disaster reduction cloud application platform as a service (PAAS) and disaster reduction software as a service (SAAS). Secondly, we talk about the standard system of disaster reduction in five aspects. Thirdly, we indicate the security system of disaster reduction cloud. Finally, we draw a conclusion the use of cloud computing technology will help us to solve the problems for disaster reduction and promote the development of disaster reduction.

  7. A High Assurance Timing Synchronization Technology for Space On-Board Distributed Computer Systems

    Microsoft Academic Search

    Hiroyuki Yashiro; Yoshirou Takahashi; Teruo Fujiwara

    2002-01-01

    The system requirements of space on-board computer necessary to realize not only high reliability but also low cost are discussed. An architecture and high assurance timing synchronization technology that meet the requirements are proposed.

  8. NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY/ NATIONAL COMPUTER SECURITY CENTER

    E-print Network

    Systems Dennis Gilbert National Institute ofStandards and Technology Irene Gilbert National Institute of Steven B. lipner Teresa lunt Dr. William V. Maconachy Sally Meglathery Dr. Jonathan Millen Warren Monroe

  9. Designing pointing devices using brain-computer interface technology

    Microsoft Academic Search

    S. G. Mason; M. M. Moore; G. E. Birch

    2003-01-01

    Existing BCI technology can be used to produce application-independent pointing devices similar to eyetracking and head-pointing devices. The BCI technologies suitable for this purpose are the techniques that use external stimulators to evoke cortical potentials. However, current models for designing BCI Systems are not suitable for this purpose. A new functional model is proposed as a guide for designing BCI-based

  10. The security of cloud computing system enabled by trusted computing technology

    Microsoft Academic Search

    Zhidong Shen; Qiang Tong

    2010-01-01

    Cloud computing provides people the way to share distributed resources and services that belong to different organizations or sites. Since cloud computing share distributed resources via the network in the open environment, thus it makes security problems important for us to develop the cloud computing application. In this paper, we pay attention to the security requirements in cloud computing environment.

  11. Use of personal computing technology by deaf-blind individuals

    Microsoft Academic Search

    Dan Zuckerman

    1984-01-01

    This paper describes a system that enables deaf-blind people to work with micro-computers. This system utilizes the International Morse Code as a general communication medium. The deaf-blind person \\

  12. Curriculums in Industrial Technology. Plastics Technology. Industrial Maintenance. Computer Numerical Control. Teacher's Manuals and Student Learning Guides.

    ERIC Educational Resources Information Center

    El Paso Community Coll., TX.

    Curriculum guides are provided for plastics technology, industrial maintenance, and computer numerical control. Each curriculum is divided into a number of courses. For each course these instructor materials are presented in the official course outline: course description, course objectives, unit titles, texts and materials, instructor resources,…

  13. EINDHOVEN UNIVERSITY OF TECHNOLOGY Department of Mathematics and Computer Science

    E-print Network

    Eindhoven, Technische Universiteit

    Centre for Analysis, Scientific computing and Applications Department of Mathematics and Computer Science+), or the even simpler case where a is constant, namely (1.4) - pu - mu + V (x)|u|p-2 u = |u|-2 u in . Since, the reaction diffusion problem ut = -div(D(u)Du) + (x, u), where D(u) = dp|Du|p-2 + dm|Du|m-2, dp > 0 and dm

  14. Computer Technologies in Education. Proceedings of the International Conference on Computer Technologies in Education (Kiev, Ukraine, September 14-17, 1993).

    ERIC Educational Resources Information Center

    Petrushin, V., Ed.; Dovgiallo, A., Ed.

    The conference reported in this document provides a meeting place for researchers from around the world, where the emphasis is on new ideas connected to computer technologies in education. This volume contains 140 extended abstracts selected by the program committee and organized into the following categories: (1) educational informational…

  15. Applicability of Time-Averaged Holography for Micro-Electro-Mechanical System Performing Non-Linear Oscillations

    PubMed Central

    Palevicius, Paulius; Ragulskis, Minvydas; Palevicius, Arvydas; Ostasevicius, Vytautas

    2014-01-01

    Optical investigation of movable microsystem components using time-averaged holography is investigated in this paper. It is shown that even a harmonic excitation of a non-linear microsystem may result in an unpredictable chaotic motion. Analytical results between parameters of the chaotic oscillations and the formation of time-averaged fringes provide a deeper insight into computational and experimental interpretation of time-averaged MEMS holograms. PMID:24451467

  16. An Investigation of the Administrator's Role as Instructional Leader in Effective Computer Technology Integration

    ERIC Educational Resources Information Center

    Thomas, Shailendra Nelle

    2010-01-01

    Purpose, scope, and method of study: Although computer technology has been a part of the educational community for many years, it is still not used at its optimal capacity (Gosmire & Grady, 2007b; Trotter, 2007). While teachers were identified early as playing important roles in the success of technology implementation, principals were often…

  17. ICT Resources in the Teaching of Mathematics: Between Computer and School Technologies. A Case-Study

    ERIC Educational Resources Information Center

    Bosco, Alejandra

    2004-01-01

    This article is based on a research project called "Information and communications technology (ICT) resources in school organizational and symbolic technology: a case-study" which was carried out in a primary school in Barcelona, Spain. The research looked at various interactions that took place between the computer as a teaching tool, the…

  18. Information and Computing Technology and the Gap between School Pedagogy and Children's Culture

    ERIC Educational Resources Information Center

    Sorensen, Birgitte Holm

    2005-01-01

    This article focuses on the gap between the use of Information and Computing Technology (ICT) in schools and the use made of ICT in children's everyday life outside school. Particular emphasis is placed on the communities of practice that young people create through their use of digital technology. The article is based on data collected over five…

  19. The Study of Computer Industry Company's Performance: The Roles of Technology Strategy and External Network

    Microsoft Academic Search

    Fen-Hui Lin; Hsing-Ya Chang

    2006-01-01

    Collaborate Commerce becomes gradually important in these years, when the technology divides into various segments so that the firms are enforced to collaborate with external network linkage. This is a survey research to study the influential factors of the company performance in computer industry in Taiwan. The two independent factors are technology strategy and external network. By using the random

  20. BACHELOR OF SCIENCE BUSINESS, COMPUTER AND INFORMATION TECHNOLOGY EDUCATION (Suggested 4 Year Plan)

    E-print Network

    Benos, Panayiotis "Takis"

    Student Teaching 12 EDUC 1330 Educating Exceptional Children* 3 EDUC 1301 Instructional Technology 3 MGMTBACHELOR OF SCIENCE BUSINESS, COMPUTER AND INFORMATION TECHNOLOGY EDUCATION (Suggested 4 Year Plan EDUC 1325 Development of Exceptional Children 3 EDUC 1350 Educational Psychology & Measurement 3 MRKT

  1. Predicting Preservice Teacher Competence in Computer Technology: Modeling and Application in Training Environments

    ERIC Educational Resources Information Center

    Fleming, Linda; Motamedi, Vahid; May, Lisa

    2007-01-01

    The purpose of this study was to determine if modeling by university professors and practicum and cooperating teachers was related to preservice teachers' perceptions of their computer technology skills and if preservice teachers' use of technology in academic and other settings was related to those perceptions. Seventy-nine preservice teacher…

  2. Roadmap: Engineering Technology -Computer Design, Animation and Game Design -Bachelor of Science

    E-print Network

    Khan, Javed I.

    RE-BS-ENGT-CDAG Regional College Catalog Year: 2014-2015 Page 1 of 2 | Last Updated: 27-May-14/JSK for Instruction or TECH 33095 Special Topics: Applied Science and Technology or TECH 34002 Advanced CAD II 3Roadmap: Engineering Technology - Computer Design, Animation and Game Design - Bachelor of Science

  3. Non-invasive brain–computer interface system: Towards its application as assistive technology

    Microsoft Academic Search

    Febo Cincotti; Donatella Mattia; Fabio Aloise; Simona Bufalari; Gerwin Schalk; Giuseppe Oriolo; Andrea Cherubini; Maria Grazia Marciani; Fabio Babiloni

    2008-01-01

    The quality of life of people suffering from severe motor disabilities can benefit from the use of current assistive technology capable of ameliorating communication, house-environment management and mobility, according to the user's residual motor abilities. Brain–computer interfaces (BCIs) are systems that can translate brain activity into signals that control external devices. Thus they can represent the only technology for severely

  4. Technology Readiness, Internet Self-Efficacy and Computing Experience of Professional Accounting Students

    ERIC Educational Resources Information Center

    Lai, Ming-Ling

    2008-01-01

    Purpose: This study aims to assess the state of technology readiness of professional accounting students in Malaysia, to examine their level of internet self-efficacy, to assess their prior computing experience, and to explore if they are satisfied with the professional course that they are pursuing in improving their technology skills.…

  5. Visual Speech in Technology-Enhanced Learning Department of Computer Science

    E-print Network

    Maddock, Steve

    Visual Speech in Technology-Enhanced Learning Priya Dey Department of Computer Science University- enhanced learning. This work applies talking heads in a speech tutoring application for teaching English of visual speech in technology-enhanced learning. User trials explored the efficacy of the software

  6. Tangible computer programming: Exploring the use of emerging technology in classrooms and science museums

    Microsoft Academic Search

    Michael S. Horn

    2009-01-01

    In considering ways to improve the use of digital technology in educational settings, it is helpful to look beyond desktop computers and conventional modes of interaction and consider the flood of emerging technologies that already play a prominent role in the everyday lives of children. In this dissertation, I will present a research project that builds on tangible user interface

  7. Roadmap: Radiologic Imaging Sciences -Computed Tomography (with certification and ATS Radiologic Technology) -

    E-print Network

    Sheridan, Scott

    Roadmap: Radiologic Imaging Sciences - Computed Tomography (with certification and ATS Radiologic Technology) - Bachelor of Radiologic and Imaging Sciences Technology [RE-BRIT-RIS-CTHA] Regional College Hours] Note: Students must have graduated from a hospital-based certificate program in radiologic

  8. EMERGING AIR QUALITY MODELING TECHNOLOGY FOR HIGH PERFORMANCE COMPUTING AND COMMUNICATION ENVIRONMENTS

    EPA Science Inventory

    To demonstrate applications of the HPCC technologies in air quality models, we organized the Specialty Evening Session 1, "Emerging Air Quality Modeling Technologies for High Performance Computing and Communication Environment" as a part of the Twenty First NATO/CCMS Internationa...

  9. Heavy Section Steel Technology HSST eLib Computational Structural Fracture Mechanics Team

    E-print Network

    Heavy Section Steel Technology ­ HSST eLib Computational Structural Fracture Mechanics Team the reports generated by the Heavy-Section Steel Technology (HSST) program (JCN B0119) from the early 1970's welcome the opportunity to discuss your potential applications and ways that the Heavy-Section Steel

  10. Factors Impacting Adult Learner Achievement in a Technology Certificate Program on Computer Networks

    ERIC Educational Resources Information Center

    Delialioglu, Omer; Cakir, Hasan; Bichelmeyer, Barbara A.; Dennis, Alan R.; Duffy, Thomas M.

    2010-01-01

    This study investigates the factors impacting the achievement of adult learners in a technology certificate program on computer networks. We studied 2442 participants in 256 institutions. The participants were older than age 18 and were enrolled in the Cisco Certified Network Associate (CCNA) technology training program as "non-degree" or…

  11. "A Technical Assistance Report" on Computer Technology Applications. Smithville School District, Smithville, Massachusetts.

    ERIC Educational Resources Information Center

    Merrimack Education Center, Chelmsford, MA.

    This report of the Technical Assistance Study provided to the Smithville Public Schools by the Technology Lighthouse of the Merrimack Education Center offers information for use in planning computer technology applications over a 3-year period. It provides specific guidelines and criteria for planning and development, equipment considerations,…

  12. Emergent technologies for teaching and learning: social media and ubiquitous computing

    Microsoft Academic Search

    Bryan N. Alexander

    2008-01-01

    How can teachers and staff approach advanced technologies to create transformative learning experiences for and with their students? We explore three fields for deploying emerging technologies in innovative, effective, and sustainable ways. Pedagogical implementations of Web 2.0 have been growing in scope and diversity, with new forms of publishing, storytelling, and literacy emerging. Computer gaming, a worldwide cultural power, presents

  13. An Evaluation of Computer-Managed Education Technology at New York City Community College.

    ERIC Educational Resources Information Center

    Chitayat, Linda

    The Computer-Managed Education Technology (COMET) program was designed to improve group instruction through the use of technological aids in the classroom. Specific objectives included: (1) improving feedback on student comprehension during a class period; (2) facilitating the administration and grading of homework and quizzes; (3) providing for…

  14. Reconstruction of sound fields using TV holography

    NASA Astrophysics Data System (ADS)

    Lokberg, Ole J.; Rustad, Rolf; Espeland, Morten

    1994-09-01

    A vibrating sound source causes periodic pressure variations in the air. The pressure variations lead to corresponding variations in the refractive index of the air which can be measured using interferometric techniques like TV- holography. Each measurement maps a cross-section of the integrated sound fields. To obtain a complete map of the volume distribution of sound field we record cross-sections from different directions. Using topographical backprojection of these recordings, we reconstruct the amplitude and phase of the sound field in any plane of the volume.

  15. Holography, Probe Branes and Isoperimetric Inequalities

    E-print Network

    Frank Ferrari; Antonin Rovai

    2014-11-19

    In many instances of holographic correspondences between a d dimensional boundary theory and a d+1 dimensional bulk, a direct argument in the boundary theory implies that there must exist a simple and precise relation between the Euclidean on-shell action of a (d-1)-brane probing the bulk geometry and the Euclidean gravitational bulk action. This relation is crucial for the consistency of holography, yet it is non-trivial from the bulk perspective. In particular, we show that it relies on a nice isoperimetric inequality that must be satisfied in a large class of Poincar\\'e-Einstein spaces. Remarkably, this inequality follows from theorems by Lee and Wang.

  16. Phase-shift binary digital holography.

    PubMed

    Horisaki, Ryoichi; Tahara, Tatsuki

    2014-11-15

    We propose phase-shift digital holography (DH) with a one-bit image sensor. In this method, the propagating complex field from an object is binarized by a one-bit sensor using a phase-shifter. The complex field on the hologram plane is then calculated with the one-bit image data. The object field is recovered via Fresnel back-propagation of the calculated hologram and filtering to suppress some artifacts caused by the binarization. The concept was demonstrated in preliminary experiments by using a synthetically binarized hologram with single-shot and multi-shot phase-shift DH. PMID:25490472

  17. Holography, Probe Branes and Isoperimetric Inequalities

    E-print Network

    Frank Ferrari; Antonin Rovai

    2015-04-06

    In many instances of holographic correspondences between a d dimensional boundary theory and a d+1 dimensional bulk, a direct argument in the boundary theory implies that there must exist a simple and precise relation between the Euclidean on-shell action of a (d-1)-brane probing the bulk geometry and the Euclidean gravitational bulk action. This relation is crucial for the consistency of holography, yet it is non-trivial from the bulk perspective. In particular, we show that it relies on a nice isoperimetric inequality that must be satisfied in a large class of Poincar\\'e-Einstein spaces. Remarkably, this inequality follows from theorems by Lee and Wang.

  18. Three-dimensional nonlinear acoustical holography

    NASA Astrophysics Data System (ADS)

    Niu, Yaying

    Nearfield Acoustical Holography (NAH) is an acoustic field visualization technique that can be used to reconstruct three-dimensional (3-D) acoustic fields by projecting two-dimensional (2-D) data measured on a hologram surface. However, linear NAH algorithms developed and improved by many researchers can result in significant reconstruction errors when they are applied to reconstruct 3-D acoustic fields that are radiated from a high-level noise source and include significant nonlinear components. Here, planar, nonlinear acoustical holography procedures are developed that can be used to reconstruct 3-D, nonlinear acoustic fields radiated from a high-level noise source based on 2-D acoustic pressure data measured on a hologram surface. The first nonlinear acoustic holography procedure is derived for reconstructing steady-state acoustic pressure fields by applying perturbation and renormalization methods to nonlinear, dissipative, pressure-based Westervelt Wave Equation (WWE). The nonlinear acoustic pressure fields radiated from a high-level pulsating sphere and an infinite-size, vibrating panel are used to validate this procedure. Although the WWE-based algorithm is successfully validated by those two numerical simulations, it still has several limitations: (1) Only the fundamental frequency and its second harmonic nonlinear components can be reconstructed; (2) the application of this algorithm is limited to mono-frequency source cases; (3) the effects of bent wave rays caused by transverse particle velocities are not included; (4) only acoustic pressure fields can be reconstructed. In order to address the limitations of the steady-state, WWE-based procedure, a transient, planar, nonlinear acoustic holography algorithm is developed that can be used to reconstruct 3-D nonlinear acoustic pressure and particle velocity fields. This procedure is based on Kuznetsov Wave Equation (KWE) that is directly solved by using temporal and spatial Fourier Transforms. When compared to the WWE-based procedure, the KWE-based procedure can be applied to multi-frequency source cases where each frequency component can contain both linear and nonlinear components. The effects of nonlinear bent wave rays can be also considered by using this algorithm. The KWE-based procedure is validated by conducting an experiment with a compression driver and four numerical simulations. The numerical and experimental results show that holographically-projected acoustic fields match well with directly-calculated and directly-measured fields.

  19. College and the Digital Generation: Assessing and Training Students for the Technological Demands of College by Exploring Relationships between Computer Self-Efficacy and Computer Proficiency

    ERIC Educational Resources Information Center

    Morris, Kathleen M.

    2010-01-01

    Today's college students are often labeled the "Net Generation" and assumed to be computer savvy and technological minded. Exposure to and use of technologies can increase self-efficacy regarding ability to complete desired computer tasks, but students arrive on campuses unable to pass computer proficiency exams. This is concerning because some…

  20. Changing How and What Children Learn in School with Computer-Based Technologies

    Microsoft Academic Search

    Jeremy Roschelle; Roy Pea; Christopher Hoadley; Douglas Gordin; Barbara Means

    2000-01-01

    Schools today face ever-increasing demands in their attempt to ensure that students are well- equipped to enter the workforce and navigate a complex world. Research indicates that computer technology can help support learning, and that it is especially useful in developing the higher order skills of critical thinking, analysis, and scientific inquiry. But the mere presence of computers in the

  1. Evaluation of Two Different Teaching Concepts in Dentistry Using Computer Technology

    ERIC Educational Resources Information Center

    Reich, Sven; Simon, James F.; Ruedinger, Dirk; Shortall, Adrian; Wichmann, Manfred; Frankenberger, Roland

    2007-01-01

    The common teaching goal of two different phantom head courses was to enable the students to provide an all-ceramic restoration by the means of computer technology. The aim of this study was to compare these two courses with regard to the different educational methods using identical computer software. Undergraduate dental students from a single…

  2. A hardware\\/software co-design system using configurable computing technology

    Microsoft Academic Search

    J. Schewel

    1998-01-01

    Virtual Computer Corporation has combined the latest reconfigurable component technology with a number of advanced software tools in one easy to use `system approach' to digital design. This hardware software co-design development system contains all the components necessary for configurable computing implementation in one integrated package. The paper describes the features and use of this system

  3. A Hardware\\/Software Co-Design System Using Configurable Computing Technology

    Microsoft Academic Search

    John Schwel; John Schewel

    1998-01-01

    Virtual Computer Corporation has combined the latest reconfigurable component technology with a number of advanced software tools in one easy to use `system approach' to digital design. This Hardware Software Co-Design Development System contains all the components necessary for configurable computing implementation in one integrated package. This paper will describe the features and use of this system.

  4. Scaling the Digital Divide: Home Computer Technology and Student Achievement. Working Paper 48

    ERIC Educational Resources Information Center

    Vigdor, Jacob L.; Ladd, Helen F.

    2010-01-01

    Does differential access to computer technology at home compound the educational disparities between rich and poor? Would a program of government provision of computers to early secondary school students reduce these disparities? The authors use administrative data on North Carolina public school students to corroborate earlier surveys that…

  5. Scaling the Digital Divide: Home Computer Technology and Student Achievement. NBER Working Paper No. 16078

    ERIC Educational Resources Information Center

    Vigdor, Jacob L.; Ladd, Helen F.

    2010-01-01

    Does differential access to computer technology at home compound the educational disparities between rich and poor? Would a program of government provision of computers to early secondary school students reduce these disparities? We use administrative data on North Carolina public school students to corroborate earlier surveys that document broad…

  6. The Effects of Computer-Assisted Feedback Strategies in Technology Education: A Comparison of Learning Outcomes

    ERIC Educational Resources Information Center

    Adams, Ruifang Hope; Strickland, Jane

    2012-01-01

    This study investigated the effects of computer-assisted feedback strategies that have been utilized by university students in a technology education curriculum. Specifically, the study examined the effectiveness of the computer-assisted feedback strategy "Knowledge of Response feedback" (KOR), and the "Knowledge of Correct Responses feedback"…

  7. The Role of Wireless Computing Technology in the Design of Schools.

    ERIC Educational Resources Information Center

    Nair, Prakash

    This document discusses integrating computers logically and affordably into a school building's infrastructure through the use of wireless technology. It begins by discussing why wireless networks using mobile computers are preferable to desktop machines in each classoom. It then explains the features of a wireless local area network (WLAN) and…

  8. Proceedings of the International Multiconference on Computer Science and Information Technology pp. 111121

    E-print Network

    Fernandez, Thomas

    and a number of different approaches have been used for the automation. Usually, an evolutionary paradigmProceedings of the International Multiconference on Computer Science and Information Technology pp. 111­121 ISSN 1896-7094 c 2006 PIPS EMOT ­ Evolutionary Approach to 3D Computer Animation Halina

  9. Visualizing History: Computer Technology and the Graphic Presentation of the Past

    ERIC Educational Resources Information Center

    Moss, Mark

    2004-01-01

    Computer technology has impacted both the study and idea of history in a number of ways. The Internet has provided numerous web-sites for students to read, see and look into for historical information. Historians, both professional and public have also begun to utilize the computer in a variety of ways, both in academic terms as well as leisure…

  10. Education/Technology/Power: Educational Computing as a Social Practice. SUNY Series, Frontiers in Education.

    ERIC Educational Resources Information Center

    Bromley, Hank, Ed.; Apple, Michael W., Ed.

    This book is organized in three parts that address the following broad topics related to educational computing: discursive practices, i.e., who speaks of educational computing and how (chapters 1-4); classroom practices (chapters 5-6); and democratic possibilities, i.e., the constructive potential of the technology (chapters 7-9). Following an…

  11. Computer Based Technology and the Language/Liberal Arts: Stepping into the Electronic Universe.

    ERIC Educational Resources Information Center

    Adams, Dennis M.

    The need for the liberal arts curriculum to incorporate new technology in order for education to reach its potential is examined in this paper, which also looks at the potential for computer-based telecommunications to extend continued education for professionals. A survey of applications of computer-based telecommunications in reading and writing…

  12. Light-Front Holography and Novel Effects in QCD

    SciTech Connect

    Brodsky, Stanley J. [SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94309 (United States); Teramond, Guy F. de [Universidad de Costa Rica, San Jose (Costa Rica)

    2009-04-20

    The correspondence between theories in anti-de Sitter space and conformal field theories in physical space-time leads to an analytic, semiclassical model for strongly-coupled QCD. Light-front holography allows hadronic amplitudes in the AdS fifth dimension to be mapped to frame-independent light-front wavefunctions of hadrons in physical space-time, thus providing a relativistic description of hadrons at the amplitude level. We identify the AdS coordinate z with an invariant light-front coordinate {zeta} which separates the dynamics of quark and gluon binding from the kinematics of constituent spin and internal orbital angular momentum. The result is a single-variable light-front Schroedinger equation for QCD which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular momentum. The mapping of electromagnetic and gravitational form factors in AdS space to their corresponding expressions in light-front theory confirms this correspondence. Some novel features of QCD are discussed, including the consequences of confinement for quark and gluon condensates and the behavior of the QCD coupling in the infrared. The distinction between static structure functions such as the probability distributions computed from the square of the light-front wavefunctions versus dynamical structure functions which include the effects of rescattering is emphasized. A new method for computing the hadronization of quark and gluon jets at the amplitude level, an event amplitude generator, is outlined.

  13. A Study to Compare Curriculum of Computer Information Systems and Computer Education and Instructional Technologies

    ERIC Educational Resources Information Center

    Cavus, Nadire

    2008-01-01

    Today, developments of information and communication technologies have been developing very fast all over the world. These new technologies were taking an important place in education like other sciences. For this reason, education was developing parallel to new developments on the new technologies. Departments which cover curriculum of new…

  14. An application of interactive computer graphics technology to the design of dispersal mechanisms

    NASA Technical Reports Server (NTRS)

    Richter, B. J.; Welch, B. H.

    1977-01-01

    Interactive computer graphics technology is combined with a general purpose mechanisms computer code to study the operational behavior of three guided bomb dispersal mechanism designs. These studies illustrate the use of computer graphics techniques to discover operational anomalies, to assess the effectiveness of design improvements, to reduce the time and cost of the modeling effort, and to provide the mechanism designer with a visual understanding of the physical operation of such systems.

  15. Jeremy S. Meredith Computer Scientist, Future Technologies Group

    E-print Network

    Pennycook, Steve

    applicable to trans-petascale applications. Professional Experience 2005­p R&D Staff, Future Technologies Biology Simulation Technique on Emerging Processing Architectures," J. S. Meredith, S. R. Alam, and J. S/s Sustained Performance in Simulations of Disorder Effects in High-Tc Superconductors," G. Alvarez, M. S

  16. Computer-automated multiparadigm modeling in control systems technology

    Microsoft Academic Search

    P. J. Mosterman; J. Sztipanovits; S. Engell

    2004-01-01

    The use of model-based technologies has made it imperative for the development of a feedback control system to deal with many different tasks such as: plant modeling in all its variety; model reduction to achieve a complexity or level of abstraction suitable for the design task at hand; synthesis of control laws that vary from discrete event reactive control to

  17. NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY! NATIONAL COMPUTER SECURITY CENTER

    E-print Network

    L. Dain Gary Carnegie Mellon University William Geer AFCSC Virgil Gibson Grumann Data Systems Dennis Gilbert National Institute of Standards and Technology Irene Gilbert National Institute of Frank Mayer Dr. Catherine Meadows Sally Meglathery William H. Murray Noel Nazario Dr. Peter Neumann Nick

  18. Computer aided manufacturing technologies for centrifugal compressor impellers

    Microsoft Academic Search

    Shang-Liang Chen; Wen-Tsai Wang

    2001-01-01

    The CAD\\/CAM technologies for manufacturing centrifugal compressor impellers and turbine blades are investigated in this research. The control data points of an impeller or a blade were obtained by using the reverse engineering method. The obtained data were used as the input data for UG CAD\\/CAM software to construct the CAD model. Increasing the machining efficiency during the rough and

  19. Progress in hypersonic combustion technology with computation and experiment

    NASA Technical Reports Server (NTRS)

    Anderson, Griffin Y.; Kumar, Ajay; Erdos, John I.

    1990-01-01

    Design of successful airbreathing engines for operation at near-orbital speeds presents significant challenges in all the disciplines involved, including propulsion. This paper presents a discussion of the important physics of hypersonic combustion and an assessment of the state of the art of ground simulations with pulse facilities and with computational techniques. Recent examples of experimental and computational simulations are presented and discussed. The need for continued application of these tools to establish the credibility and fidelity of engineering design methods for practical hypersonic combustors is emphasized along with the critical need for improved diagnostic methods for hypervelocity reacting flows.

  20. Selectable-wavelength low-coherence digital holography with chromatic phase shifter.

    PubMed

    Pham, Quang Duc; Hasegawa, Satoshi; Kiire, Tomohiro; Barada, Daisuke; Yatagai, Toyohiko; Hayasaki, Yoshio

    2012-08-27

    We propose a new digital holography method using an ultra-broadband light source and a chromatic phase-shifter. The chromatic phase-shifter gives different frequency shifts for respective spectral frequencies so that the spectrum of the light reflected from the object can be measured to reveal the spectral property of the object, and arbitrary selection of signals in the temporal frequency domain enables single- and multi-wavelength measurements with wide dynamic range. A theoretical analysis, computer simulations, and optical experiments were performed to verify the advantages of the proposed method. PMID:23037027

  1. An evolving infrastructure for scientific computing and the integration of new graphics technology

    SciTech Connect

    Fong, K.W.

    1993-02-01

    The National Energy Research Supercomputer Center (NERSC) at the Lawrence Livermore National Laboratory is currently pursuing several projects to implement and integrate new hardware and software technologies. While each of these projects ought to be and is in fact individually justifiable, there is an appealing metaphor for viewing them collectively which provides a simple and memorable way to understand the future direction not only of supercomputing services but of computer centers in general. Once this general direction is understood, it becomes clearer what future computer graphics technologies would be possible and desirable, at least within the context of large scale scientific computing.

  2. Managing Technostress: Optimizing the Use of Computer Technology.

    ERIC Educational Resources Information Center

    Brod, Craig

    1982-01-01

    Afraid of change, many employees refuse to join the computer revolution. The author states that only understanding and proper training can break down such resistance. The term "technostress" is described and the importance of employee self-assessment is examined. (CT)

  3. Practical Strategies for Power-Efficient Computing Technologies

    Microsoft Academic Search

    Leland Chang; David J. Frank; Robert K. Montoye; Steven J. Koester; Brian L. Ji; Paul W. Coteus; Robert H. Dennard; Wilfried Haensch

    2010-01-01

    After decades of continuous scaling, further advancement of silicon microelectronics across the entire spectrum of computing applications is today limited by power dissipation. While the trade-off between power and performance is well-recognized, most recent studies focus on the extreme ends of this balance. By concentrating instead on an intermediate range, an ~ 8?? improvement in power efficiency can be attained

  4. oitUMass Office of Information Technologies OIT Academic Computing

    E-print Network

    Mountziaris, T. J.

    headsets are ideal for basic solo recording. 3. Audio Editing Software: in this document we focus on Apple audio software that comes with MacOS as part of the iLife suite. It can be used to compose music, editLife, a software suite for your Macintosh computer and is one of the possible applications you can use to capture

  5. COMPUTER MODEL TECHNOLOGY TRANSFER IN THE UNITED STATES

    EPA Science Inventory

    Computer-based mathematical models for urban water resources planning, management and design are widely used by engineers and planners in both the public and private sectors. In the United States, the majority of the users are in the private (consulting) sector, yet most of the m...

  6. Adults' Uses of Computer Technology: Associations with Literacy Tasks

    ERIC Educational Resources Information Center

    Smith, M. Cecil; Smith, Thomas J.

    2010-01-01

    The present study examined data from a large, nationally representative sample--the National Assessment of Adult Literacy (NCES, 2007)--to examine how computer use and Internet-based literacy practices (use of e-mail, searching for information on the Internet, and Internet chatting) were related to prose, document, and quantitative literacy…

  7. Effects of Educational Beliefs on Attitudes towards Using Computer Technologies

    ERIC Educational Resources Information Center

    Onen, Aysem Seda

    2012-01-01

    This study, aiming to determine the relationship between pre-service teachers' beliefs about education and their attitudes towards utilizing computers and internet, is a descriptive study in scanning model. The sampling of the study consisted of 270 pre-service teachers. The potential relationship between the beliefs of pre-service teachers about…

  8. Educational Technology Research Journals: Computers & Education, 2002-2011

    ERIC Educational Resources Information Center

    Rackham, David D.; Hyatt, Frederick R.; Macfarlane, David C.; Nisse, Tony; Woodfield, Wendy; West, Richard E.

    2013-01-01

    In this study, the authors examined the journal "Computers & Education" to discover research trends in the articles published during 2002-2011. Research articles were analyzed to determine trends in the research methods and types of articles published, as well as the key topics published, top authors, and some of the most-cited…

  9. Children and Computers: New Technology--Old Concerns.

    ERIC Educational Resources Information Center

    Wartella, Ellen A.; Jennings, Nancy

    2000-01-01

    Places current research on children and computers in historical context with earlier research on the mass media, noting recurrent patterns in 20th century media research. Concludes that to inform and sustain the creation of more quality content for children, further research is needed on the effects of media on children, with new partnerships…

  10. A Smart Meeting Room with Pervasive Computing Technologies

    Microsoft Academic Search

    Shameem Ahmed; Moushumi Sharmin; Sheikh Iqbal Ahamed

    2005-01-01

    Usability of pervasive computing features along with the detection of a meeting is very effective for the users. In this paper, we present the design of a smart meeting room (SMR) that not only detect the starting and ending of a meeting but also provide the support of participant's context information, knowledge usability and ephemeral group communication. Our approach will

  11. Key Technologies Analysis of Three Sides Chinese Chess Computer Game

    Microsoft Academic Search

    Zedan Chen; Miao Liu; Zhiqiang Li; Xiaofeng Lian

    2008-01-01

    The three sides Chinese chess is a novel game which is developed from the traditional Chinese chess. There are not any research results on the three sides Chinese chess computer game. In this paper, the three sides Chinese game is firstly compared with the traditional Chinese chess. Then an algorithm of three sides game searching with pruning is put forward,

  12. SAMGrid experiences with the Condor technology in Run II computing

    SciTech Connect

    Baranovski, A.; Loebel-Carpenter, L.; Garzoglio, G.; Herber, R.; Illingworth, R.; Kennedy, R.; Kreymer, A.; Kumar, A.; Lueking, L.; Lyon, A.; Merritt, W.; Terekhov, I.; Trumbo, J.; Veseli, S.; White, S.; /Fermilab; St. Denis, R.; /Glasgow U.; Jain, S.; Nishandar, A.; /Texas U., Arlington

    2004-12-01

    SAMGrid is a globally distributed system for data handling and job management, developed at Fermilab for the D0 and CDF experiments in Run II. The Condor system is being developed at the University of Wisconsin for management of distributed resources, computational and otherwise. We briefly review the SAMGrid architecture and its interaction with Condor, which was presented earlier. We then present our experiences using the system in production, which have two distinct aspects. At the global level, we deployed Condor-G, the Grid-extended Condor, for the resource brokering and global scheduling of our jobs. At the heart of the system is Condor's Matchmaking Service. As a more recent work at the computing element level, we have been benefiting from the large computing cluster at the University of Wisconsin campus. The architecture of the computing facility and the philosophy of Condor's resource management have prompted us to improve the application infrastructure for D0 and CDF, in aspects such as parting with the shared file system or reliance on resources being dedicated. As a result, we have increased productivity and made our applications more portable and Grid-ready. Our fruitful collaboration with the Condor team has been made possible by the Particle Physics Data Grid.

  13. Future of computing technology in physics - the potentials and pitfalls

    SciTech Connect

    Brenner, A.E.

    1984-02-01

    The impact of the developments of modern digital computers is discussed, especially with respect to physics research in the future. The effects of large data processing capability and increasing rates at which data can be acquired and processed are considered. (GHT)

  14. Computer Technology in Curriculum and Instruction Handbook. Courseware Evaluation.

    ERIC Educational Resources Information Center

    Collins, Sue; Newman, Joan

    Developed to provide Washington State educators with information on the evaluation of computer software or courseware, this booklet includes brief sections on general criteria for evaluating instructional materials, general criteria for evaluating courseware, and special considerations in evaluating courseware. Such considerations include deciding…

  15. Computer-Integrated Manufacturing Technology. Tech Prep Competency Profile.

    ERIC Educational Resources Information Center

    Lakeland Tech Prep Consortium, Kirtland, OH.

    This tech prep competency profile covers these occupations: manufacturing technician, computer-assisted design and drafting (CADD) technician, quality technician, and mechanical technician. Section 1 provides occupation definitions. Section 2 lists development committee members. Section 3 provides the leveling codes---abbreviations for grade level…

  16. ELECTRON HOLOGRAPHY OF NANOMAGNETS IN ROCKS AND BACTERIA

    E-print Network

    Dunin-Borkowski, Rafal E.

    -reversed thermo-remanent magnetization. #12;Magnetotactic bacteria provide the simplest example of the useELECTRON HOLOGRAPHY OF NANOMAGNETS IN ROCKS AND BACTERIA Rafal E. Dunin-Borkowski1 , Richard J

  17. High End Computing Technologies for Earth Science Applications: Trends, Challenges, and Innovations

    NASA Technical Reports Server (NTRS)

    Parks, John (Technical Monitor); Biswas, Rupak; Yan, Jerry C.; Brooks, Walter F.; Sterling, Thomas L.

    2003-01-01

    Earth science applications of the future will stress the capabilities of even the highest performance supercomputers in the areas of raw compute power, mass storage management, and software environments. These NASA mission critical problems demand usable multi-petaflops and exabyte-scale systems to fully realize their science goals. With an exciting vision of the technologies needed, NASA has established a comprehensive program of advanced research in computer architecture, software tools, and device technology to ensure that, in partnership with US industry, it can meet these demanding requirements with reliable, cost effective, and usable ultra-scale systems. NASA will exploit, explore, and influence emerging high end computing architectures and technologies to accelerate the next generation of engineering, operations, and discovery processes for NASA Enterprises. This article captures this vision and describes the concepts, accomplishments, and the potential payoff of the key thrusts that will help meet the computational challenges in Earth science applications.

  18. Particle and flow field holography: A critical survey

    NASA Technical Reports Server (NTRS)

    Trolinger, James D.

    1987-01-01

    A brief background is provided for the fields of particle and flow visualization holography. A summary of methods currently in use is given, followed by a discussion of more recent and unique applications. The problem of data reduction is discussed. A state of the art summary is then provided with a prognosis of the future of the field. Particle and flow visualization holography are characterized as powerful tools currently in wide use and with significant untapped potential.

  19. High-resolution imaging using endoscopic holography

    NASA Astrophysics Data System (ADS)

    Bjelkhagen, Hans I.

    1990-08-01

    Endoscopic holography or endoholography combines the features of endoscopy and holography. The purpose of endoholographic imaging is to provide the physician with a unique means of extending diagnosis by providing a life-like record of tissue. Endoholographic recording will provide means for microscopic examination of tissue and in some cases may obviate the need to excise specimens for biopsy. In this method holograms which have the unique properties of three-dimensionality large focal depth and high resolution are made with a newly designed endoscope. The endoscope uses a single-mode optical fiber for illumination and single-beam reflection holograms are recorded in close contact with the tissue at the distal end of the endoscope. The holograms are viewed under a microscope. By using the proper combinations of dyes for staining specific tissue types with various wavelengths of laser illumination increased contrast on the cellular level can be obtained. Using dyes such as rose bengal in combination with the 514. 5 nm line of an argon ion laser and trypan blue or methylene blue with the 647. 1 nm line of a krypton ion laser holograms of the stained colon of a dog showed the architecture of the colon''s columnar epithelial cells. It is hoped through chronological study using this method in-vivo an increased understanding of the etiology and pathology of diseases such as Crohn''s diseases colitis proctitis and several different forms of cancer will help to their control. 1.

  20. Gray-Scale Atom Holography

    Microsoft Academic Search

    Tetsuo Kishimoto; Jun'ichi Fujita; Satoru Mitake; Fujio Shimizu

    1999-01-01

    A gray-scale photographic image of atoms has been generated by usinga computer-designed thin-film hologram. An ultra-cold neon atomic beamin the 1s3 state was transmitted through a thin-film binary hologram made of SiN4 and generated a pattern of atoms on amicro-channel plate detector. The designand the quality evaluation of the hologram for gray-scale picturesare discussed theoretically. The validity of the theoretical

  1. Stringy holography at finite density

    NASA Astrophysics Data System (ADS)

    Goykhman, M.; Parnachev, A.

    2014-12-01

    We consider an exactly solvable worldsheet string theory in the background of a black brane with a gauge field flux. Holographically, such a system can be interpreted as a field theory with finite number of degrees of freedom at finite temperature and density. We construct closed string vertex operators which holographically represent the U(1) gauge field and the stress energy tensor and compute their two-point functions. At finite density the system behaves like a sum of two noninteracting fluids.

  2. Service Robot System Based on Brain-computer Interface Technology

    Microsoft Academic Search

    Li Zhao; Chuo Li; Shigang Cui

    2007-01-01

    This paper presents a brain-computer interface (BCI) system that can help the disabled to control external service robot. The system is based on electroencephalogram (EEG) alpha (a) wave. Alpha wave-block was recognized, processed and transmitted to control single option, and design of state selector helps to realize multi-option control. BCI subjects were able to use the system reliably after merely

  3. Use of personal computing technology by deaf-blind individuals

    Microsoft Academic Search

    Dan Zuckerman

    1984-01-01

    This paper describes a system that enables deaf-blind people to work with microcomputers. The system utilizes the International Morse Code as a general communication medium. The deaf-blind person hears Morse code via a vibrotactile device to see the computer's screen. This technique enables deaf-blind individuals to receive immediate feedback from their typing and to scan the screen. This makes it

  4. Computer Technology/Special Education/Rehabilitation: Proceedings of the Conference (2nd, Northridge, California, October 16-18, 1986).

    ERIC Educational Resources Information Center

    Murphy, Harry J., Ed.

    The following 25 papers (with their authors) are presented from a conference on computer technology in special education and rehabilitation: "Computers for Business--Computers for Life" (I. Keith Austin); "Rehabilitation and the Computer: How to Find What You Need" (Thomas Backer); "Computer Access Alternatives for Visually Impaired People in…

  5. POLICY ON ELECTRONIC PUBLISHING AND APPROPRIATE USE OF COMPUTING RESOURCES, INFORMATION TECHNOLOGIES, AND NETWORKS (Senate 4/1/99)

    E-print Network

    Collins, Gary S.

    . This Appropriate Use Policy governs the use of WSU computing resources, information technologies, and networks. This includes, but is not limited to, computers, computing staff, hardware, software, networks, computing laboratories, databases, files, information, software licenses, computing-related contracts, network bandwidth

  6. Parallel, distributed and GPU computing technologies in single-particle electron microscopy

    PubMed Central

    Schmeisser, Martin; Heisen, Burkhard C.; Luettich, Mario; Busche, Boris; Hauer, Florian; Koske, Tobias; Knauber, Karl-Heinz; Stark, Holger

    2009-01-01

    Most known methods for the determination of the structure of macromolecular complexes are limited or at least restricted at some point by their computational demands. Recent developments in information technology such as multicore, parallel and GPU processing can be used to overcome these limitations. In particular, graphics processing units (GPUs), which were originally developed for rendering real-time effects in computer games, are now ubiquitous and provide unprecedented computational power for scientific applications. Each parallel-processing paradigm alone can improve overall performance; the increased computational performance obtained by combining all paradigms, unleashing the full power of today’s technology, makes certain applications feasible that were previously virtually impossible. In this article, state-of-the-art paradigms are introduced, the tools and infrastructure needed to apply these paradigms are presented and a state-of-the-art infrastructure and solution strategy for moving scientific applications to the next generation of computer hardware is outlined. PMID:19564686

  7. Work and Technology in Higher Education: The Social Construction of Academic Computing. Technology and Education Series.

    ERIC Educational Resources Information Center

    Shields, Mark A., Ed.

    This volume contributes to the understanding of higher education's catalytic role in shaping the microcomputer revolution. Academic computing is viewed here as a social and cultural phenomenon. An in-depth collection of mainly ethnographic studies of the academic computing revolution--its consequences, meanings, and significance--is presented. The…

  8. Conformal field theories in a periodic potential: Results from holography and field theory

    NASA Astrophysics Data System (ADS)

    Chesler, Paul; Lucas, Andrew; Sachdev, Subir

    2014-01-01

    We study (2+1)-dimensional conformal field theories (CFTs) with a globally conserved U(1) charge, placed in a chemical potential which is periodically modulated along the spatial direction x with zero average: ?(x)=V cos(kx). The dynamics of such theories depends only on the dimensionless ratio V /k, and we expect that they flow in the infrared to new CFTs whose universality class changes as a function of V/k. We compute the frequency-dependent conductivity of strongly coupled CFTs using holography of the Einstein-Maxwell theory in four-dimensional anti-de Sitter space. We compare the results with the corresponding computation of weakly coupled CFTs, perturbed away from the CFT of free, massless Dirac fermions (which describes graphene at low energies). We find that the results of the two computations have significant qualitative similarities. However, differences do appear in the vicinities of an infinite discrete set of values of V/k: the universality class of the infrared CFT changes at these values in the weakly coupled theory, by the emergence of new zero modes of Dirac fermions which are remnants of local Fermi surfaces. The infrared theory changes continuously in holography, and the classical gravitational theory does not capture the physics of the discrete transition points between the infrared CFTs. We briefly note implications for a nonzero average chemical potential.

  9. Coupling High Resolution Earth System Models Using Advanced Computational Technologies

    Microsoft Academic Search

    Christa Peters-Lidard; Sujay Kumar; Wei-Kuo Tao; Joseph Eastman; Xiping Zeng; Steve Lang; Paul Houser

    Abstract—The,NASA\\/GSFC Land Information System (LIS) has,now,been,successfully coupled,to the Weather,Research and Forecasting (WRF) and Goddard,Cumulus,Ensemble,(GCE) models,using parallel techniques,in a manner,compliant,with the Earth System Modeling Framework,(ESMF). LIS is a high- performance Land Data Assimilation System (LDAS), developed under funding from ESTO-CT’s Round-3 CAN, whose TRL3 technologies,have,been,advanced,to TRL4 the current,ESTO- AIST project. The original LIS consists of several land,sur- face models,run,in an uncoupled,manner,(i.e.

  10. CLOUD COMPUTING FUNDAMENTALS PROGRAM An eleven-week in-depth program in the principles, methods, and technologies of Cloud Computing

    E-print Network

    Schaefer, Marcus

    CLOUD COMPUTING FUNDAMENTALS PROGRAM An eleven-week in-depth program in the principles, methods, and technologies of Cloud Computing DePaul University's Cloud Computing Fundamentals Program provides a comprehensive introduction to essential aspects of Cloud Computing. The program is designed to quickly educate

  11. OBCOM2006 INT'L CONFERENCE ON MOBILE, UBIQUITOUS & PERVASIVE COMPUTING Information and Communication Technologies (ICT) are critical to

    E-print Network

    Melbourne, University of

    -driven information and communication technologies, systems and products. Foreseeing importance and impact and Communication Technologies (ICT) are critical to India's future and underpin realization of the Vision 2020 to achieve the convergence of computing, communications and media technologies. Mobile computing and related

  12. 4D imaging based on the Fresnel incoherent correlation holography

    NASA Astrophysics Data System (ADS)

    Shi, Xia; Yuan, Bin; Zhu, Wufeng; Liang, Erjun; Liu, Xiaomin; Ma, Fengying

    2014-11-01

    Fresnel incoherent correlation holography (FINCH) is one of the 3D imaging techniques which records holograms under incoherent illumination. A spatial light modulator (SLM) is used to split the incoherent light reflected/emitted from each object point into two self-coherent spherical beams with different curvatures, and the interference fringes is recorded by a CCD. This technology has been well used in white light reflection imaging and 3D fluorescence microscope imaging. We present a new idea of 4D imaging including three-dimensional spatial information and one-dimensional spectral information on the basis of FINCH. A mathematical model of 4D FINCH system using dual diffractive lenses on a spatial light modulator has been established. We obtained the specific forms of the point spread function, the axial magnification and the reconstruction distance. The experimental results of 3D FINCH imaging are given and one example of 4D imaging with three channels is numerically simulated. And we discussed the key problems of 4D imaging at last.

  13. Acoustic emission linear pulse holography

    DOEpatents

    Collins, H. Dale (Richland, WA); Busse, Lawrence J. (Richland, WA); Lemon, Douglas K. (West Richland, WA)

    1985-01-01

    Defects in a structure are imaged as they propagate, using their emitted acoustic energy as a monitored source. Short bursts of acoustic energy propagate through the structure to a discrete element receiver array. A reference timing transducer located between the array and the inspection zone initiates a series of time-of-flight measurements. A resulting series of time-of-flight measurements are then treated as aperture data and are transferred to a computer for reconstruction of a synthetic linear holographic image. The images can be displayed and stored as a record of defect growth.

  14. Acoustic emission linear pulse holography

    SciTech Connect

    Collins, H. D.; Busse, L. J.; Lemon, D. K.

    1985-07-30

    Defects in a structure are imaged as they propagate, using their emitted acoustic energy as a monitored source. Short bursts of acoustic energy propagate through the structure to a discrete element receiver array. A reference timing transducer located between the array and the inspection zone initiates a series of time-of-flight measurements. A resulting series of time-of-flight measurements are then treated as aperture data and are transferred to a computer for reconstruction of a synthetic linear holographic image. The images can be displayed and stored as a record of defect growth.

  15. Geometrically induced metastability and holography

    SciTech Connect

    Aganagic, Mina; Aganagic, Mina; Beem, Christopher; Seo, Jihye; Vafa, Cumrun

    2006-10-23

    We construct metastable configurations of branes and anti-branes wrapping 2-spheres inside local Calabi-Yau manifolds and study their large N duals. These duals are Calabi-Yau manifolds in which the wrapped 2-spheres have been replaced by 3-spheres with flux through them, and supersymmetry is spontaneously broken. The geometry of the non-supersymmetric vacuum is exactly calculable to all orders of the't Hooft parameter, and to the leading order in 1/N. The computation utilizes the same matrix model techniques that were used in the supersymmetric context. This provides a novel mechanism for breaking supersymmetry in the context of flux compactifications.

  16. Technology.

    ERIC Educational Resources Information Center

    Online-Offline, 1998

    1998-01-01

    Focuses on technology, on advances in such areas as aeronautics, electronics, physics, the space sciences, as well as computers and the attendant progress in medicine, robotics, and artificial intelligence. Describes educational resources for elementary and middle school students, including Web sites, CD-ROMs and software, videotapes, books,…

  17. ELECTRON HOLOGRAPHY OF ELECTROMAGNETIC FIELDS - RECENT THEORETICAL ADVANCES.

    SciTech Connect

    BELEGGIA,M.; POZZI, G.; TONOMURA, A.

    2007-01-01

    It has been shown in this work that the Fourier space approach can be fruitfully applied to the calculation of the fields and the associated electron optical phase shift of several magnetic and electrostatic structures, like superconducting vortices in conventional and high-T{sub c} superconductors, reverse biased p-n junctions, magnetic domains and nanoparticles. In all these cases, this novel approach has led to unexpected but extremely interesting results, very often expressed in analytical form, which allow the quantitative and reliable interpretation of the experimental data collected by means of electron holography or of more conventional Lorentz microscopy techniques. Moreover, it is worth recalling that whenever long-range electromagnetic fields are involved, a physical model of the object under investigation is necessary in order to take into account correctly the perturbation of the reference wave induced by the tail of the field protruding into the vacuum. For these reasons, we believe that the Fourier space approach for phase computations we have introduced and discussed in this chapter will represent an invaluable tool for the investigation of electromagnetic fields at the meso- and nano-scale.

  18. Light-Front Holography and Hadronization at the Amplitude Level

    SciTech Connect

    Brodsky, Stanley J. [Stanford Linear Accelerator Center, Stanford University, Stanford, CA 94309 (United States) and the Institute for Particle Physics and Phenomenology, Durham (United Kingdom); Teramond, Guy F. de [Universidad de Costa Rica, San Jose (Costa Rica); Shrock, Robert [C.N. Yang Institute for Theoretical Physics, Stony Brook University, Stony Brook, NY 11794 (United States)

    2008-10-13

    The correspondence between theories in anti-de Sitter space and conformal field theories in physical space-time leads to an analytic, semiclassical model for strongly-coupled QCD which has scale invariance at short distances and color confinement at large distances. Light-front holography is a remarkable feature of AdS/CFT: it allows hadronic amplitudes in the AdS fifth dimension to be mapped to frame-independent light-front wavefunctions of hadrons in physical space-time, thus providing a relativistic description of hadrons at the amplitude level. Some novel features of QCD are discussed, including the consequences of confinement for quark and gluon condensates and the behavior of the QCD coupling in the infrared. We suggest that the spatial support of QCD condensates is restricted to the interior of hadrons, since they arise due to the interactions of confined quarks and gluons. Chiral symmetry is thus broken in a limited domain of size 1/m{sub {pi}}, in analogy to the limited physical extent of superconductor phases. A new method for computing the hadronization of quark and gluon jets at the amplitude level, an event amplitude generator, is outlined.

  19. Using the Computer with Students with Emotional and Behavioral Disorders. Tech Use Guide: Using Computer Technology.

    ERIC Educational Resources Information Center

    Fitzgerald, Gail

    This guide examines the computer's role in the educational environment of students with emotional or behavioral disorders (EBD). The computer's power to reinforce students who are reluctant learners, in a personalized learning environment without the complications of adult interactions or behavioral control issues, is noted. Characteristics of EBD…

  20. From computer images to video presentation: Enhancing technology transfer

    NASA Technical Reports Server (NTRS)

    Beam, Sherilee F.

    1994-01-01

    With NASA placing increased emphasis on transferring technology to outside industry, NASA researchers need to evaluate many aspects of their efforts in this regard. Often it may seem like too much self-promotion to many researchers. However, industry's use of video presentations in sales, advertising, public relations and training should be considered. Today, the most typical presentation at NASA is through the use of vu-graphs (overhead transparencies) which can be effective for text or static presentations. For full blown color and sound presentations, however, the best method is videotape. In fact, it is frequently more convenient due to its portability and the availability of viewing equipment. This talk describes techniques for creating a video presentation through the use of a combined researcher and video professional team.