Sample records for computer technology holography

  1. Holography and optical computing: the ongoing entanglement

    NASA Astrophysics Data System (ADS)

    Caulfield, H. John

    2003-05-01

    Holography records not a 3D image but an encrypted wavefront. To determine what object must have caused that wavefront, we must solve the inverse problem. Most of the time, inverse problems are singular, but in certain very simple cases they are not and an optical computer does that very well. In others, it is disastrous. So, optical computing has been part of holography from its beginning in 1947. It was not until 1962 with VanderLugt's work on Fourier Optical pattern recognitiion that holography became part of optical computing. In this paper, I review both directions of that continuing intercourse between hologrpahy and optical computing. Neither requires the other, and both are sometimes best without the other. But there remain a few cases where the fit seems ideal. The processing and recording and modification of spectral-temporal patterns is the test case I will use to illustrate their constructive relationships. Here are some examples: Spectral recognition is best done in the optical domain by holography. Temporal pulse shaping is best done in the optical domain by holography. Temporal pulses are best recorded by holography.

  2. Computer simulated holography and computer generated holograms

    NASA Astrophysics Data System (ADS)

    Trester, Seymour

    1996-04-01

    The success of calculating and displaying the Fraunhofer diffraction patterns for various apertures using the fast Fourier transform algorithm on an IBM compatible personal computer has been well documented in the recent literature. In this paper the technique is extended to the simulation of optical holography on the computer. Using this method, Fourier transform holograms are easily generated. Their optically reconstructed images are compared to the ones reconstructed and displayed by the computer. These computer generated images allow for a quantitative verification of the holographic theory presented and can serve as the basis of a tutorial on this subject suitable for advanced undergraduates. The calculations and graphics were accomplished using the mathcad(R) for windowsTM software package.

  3. Introduction to Modern Digital Holography

    NASA Astrophysics Data System (ADS)

    Poon, Ting-Chung; Liu, Jung-Ping

    2014-01-01

    1. Wave optics; 2. Fundamentals of holography; 3. Types of holograms; 4. Conventional digital holography; 5. Digital holography: special techniques; 6. Applications in digital holography; 7. Computer-generated holography; Index.

  4. 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.

  5. Plasma diagnostics with computer-imaged microwave holography

    Microsoft Academic Search

    Keigo Iizuka; Alfred Wong; Joseph Santoru; G. Steiner

    1982-01-01

    The application of computer-imaged microwave holography to plasma physics diagnostics is formulated mathematically. A system is constructed and its performance evaluated; this is followed by an experimental test in a plasma chamber. The initial results suggest that the holographic technique holds promise owing to its noninterference versatility and simplicity of operation. All spatial scanning is accomplished with the processing only,

  6. IEEE / OSA JOURNAL OF DISPLAY TECHNOLOGY 1 Digital Holography at Shot Noise Level

    E-print Network

    Paris-Sud XI, Université de

    ] imaging. Phase-shifting holography has been applied to 3D [21], [22], color [23], synthetic aperture [24, such as a CCD camera, and the image is digitally reconstructed by a computer, avoiding photographic processing-shifting digital holography, which has been introduced later [9], records several images with a different phase

  7. Complementary computer generated holography for aesthetic watermarking.

    PubMed

    Martinez, Christophe; Lemonnier, Olivier; Laulagnet, Fabien; Fargeix, Alain; Tissot, Florent; Armand, Marie Françoise

    2012-02-27

    We present herein an original solution for the watermarking of holograms in binary graphic arts without unaesthetic diffractive effect. It is based on the Babinet principle of complementary diffractive structures adapted to Lohmann-type computer generated holograms. We introduce the concept and demonstrate its interest for anti-counterfeiting applications with the decoding of a hidden data matrix. A process of thermal lithography is used for the manufacturing of binary graphic arts containing complementary computer generated holograms. PMID:22418361

  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. Gray tone image watermarking with complementary computer generated holography.

    PubMed

    Martinez, Christophe; Laulagnet, Fabien; Lemonnier, Olivier

    2013-07-01

    We present herein an original approach for the watermarking of holograms in gray tone images for use in microscopic halftone image archiving. Our concept is based on the principle of complementary holography presented in a previous contribution. The efficiency of the concept is evaluated theoretically and experimentally. We demonstrate the interest of elliptical diffraction patterns as an alternative to the usual rectangular diffraction patterns and confirm the subsidiary role of the hologram amplitude in the hologram recovery process. PMID:23842332

  10. Computer Abstractions and Technology

    E-print Network

    Huang, Chun-Hsi

    Chapter 1 Computer Abstractions and Technology #12;Chapter 1 -- Computer Abstractions and Technology -- 2 The Computer Revolution Progress in computer technology Underpinned by Moore's Law Makes and Technology -- 3 Classes of Computers Desktop computers General purpose, variety of software Subject to cost

  11. Optimization of design-wavelength for unobtrusive chromatic aberration in high-definition color computer holography

    NASA Astrophysics Data System (ADS)

    Miyaoka, Takashi; Matsushima, Kyoji; Nakahara, Sumio

    2015-03-01

    We propose a technique for optimization of design-wavelengths in trichromatic computer holography. Full color reconstruction of high-definition computer-generated holograms (CGH) is simply realized by combining three primary color images reconstructed by three CGHs. However, chromatic aberrations occur in the reconstruction, because incoherent light sources such as LED are commonly used for the illumination. Since these chromatic aberrations change dependently on the design-wavelengths of CGHs as well as the shape of illumination spectra, optimization techniques based on simulated reconstruction of CGHs is presented to obtain the most unobtrusive color aberration from spectra specific to the light source.

  12. 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.

  13. Frequency control in laser ultrasound with computer generated holography

    NASA Astrophysics Data System (ADS)

    Clark, M.; Linnane, F.; Sharples, S. D.; Somekh, M. G.

    1998-04-01

    In laser ultrasonics a laser is used to excite ultrasonic waves. The intensity profile of the laser on the sample can be used to control the frequency of the ultrasound generated. In this letter we show how the frequency content of Rayleigh (surface acoustic) waves generated with an 82 MHz mode-locked laser can be controlled using computer generated holograms (CGHs). To demonstrate the effectiveness of the frequency control the CGHs used were defocused to generate new illumination profiles. The agreement between the actual and predicted amplitudes for these profiles is striking. Using this technique, the intensity output from the CGHs may be considered as a tunable Rayleigh wave source.

  14. Computer Technology Institute & Press "DIOPHANTUS"

    E-print Network

    Bouras, Christos

    . . . . . . . . . Computer Technology Institute & Press "DIOPHANTUS" Research Unit 6 http://ru6.cti.gr Networks, Telematics and New Services 2014 #12;Computer Technology Institute & Press "Diophantus" - Research Unit 6 Computer Technology Institute & Press "DIOPHANTUS" The Computer Technology Institute

  15. OPTIMIZING COMPUTER TECHNOLOGY INTEGRATION

    Microsoft Academic Search

    Elizabeth Dillon-Marable; Thomas Valentine

    2006-01-01

    The purpose of this study was to better utiderstatid what optimal computer techtiol- ogy ititegration looks like in adult basic skills education (ABSE). One question guided the research: How is computer technology integration best conceptualized and measured? The study used the Delphi method to map the cotistruct of computer technology integratioti and required qualitative analysis of expert opinion, gathered in

  16. Mechanical Computation: its Computational Complexity and Technologies

    E-print Network

    Reif, John H.

    Mechanical Computation: its Computational Complexity and Technologies Chapter, Encyclopedia Importance II. Introduction to Computational Complexity III. Computational Complexity of Mechanical Devices and their Movement Problems IV. Concrete Mechanical Computing Devices V. Future Directions VI. Bibliography Glossary

  17. Computed tomography of cylindrically symmetric object by use of digital holography

    NASA Astrophysics Data System (ADS)

    Pan, Zhelang; Li, Shiping; Zhong, Jingang

    2013-04-01

    Digital holographic tomography, a computed tomography by use of digital holography, has a huge potential for three-dimensional imaging of weakly-diffracting phase objects. But the need of multiple angles of illumination weakened imaging capability of dynamic objects. For cylindrically symmetric object, we can use complex amplitude data of single hologram under zero incidence angles to replace the other complex amplitude data under different incidence angles. Therefore, it is possible to achieve the dynamic imaging of cylindrically symmetric objects. The digital holographic tomography can provide a way for the dynamic imaging of phase-type objects having a cylindrically symmetric structure. We report an experimental example of the capillary tube having a cylindrically symmetric structure. Tomography of the capillary tube is performed by filtered back-projection algorithm and Fourier diffraction algorithm respectively to reconstruct the 3-D map of refractive index. Experimental results show that, comparing with the filtered back-projection reconstruction, diffraction tomography based on the Rytov approximation better respects the dimensions of the capillary tube.

  18. 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

  19. technologies for computer

    E-print Network

    Chaudhuri, Surajit

    research conferences to present papers or posters at special sessions each year. Winners receive prizes projects. cra.org/awards/undergrad Microsoft Research Faculty Fellows Every year since 2005, we have information about how Microsoft Research tools and technologies can enhance your computer science research

  20. Internet Archive: Computers & Technology

    NSDL National Science Digital Library

    2012-04-06

    This particular corner of the Internet Archive brings together a variety of videos about computing and technology, paying special attention to two television programs from the 1980s and 1990s: Computer Chronicles and Net Cafe. Computer Chronicles was hosted by Stewart Cheifet and it was produced from 1983 to 2002. Visitors can watch many of these episodes and might start by looking at a profile of Bill Gates from 1998 and a rather interesting show on the possibilities of virtual reality. Visitors can also look over the rather cool Staff Picks area where they can watch shows on the Commodore 64 and MIDI Music. Net Cafe was produced from 1996 to 2002 and visitors can watch archived episodes of it as well.

  1. Computer Technology in Massachusetts Schools.

    ERIC Educational Resources Information Center

    Hess, John; Sanders, Jean E., Ed.

    This report focuses on the status and future of computer technology in Massachusetts schools. The report is organized into four major sections. Introductory information is provided in section 1, followed by a framework (section 2) for viewing computer technology. This framework provides information on computer hardware components, computer…

  2. Optical transforms in digital holography

    NASA Astrophysics Data System (ADS)

    Yaroslavsky, L.

    2006-05-01

    Digital holography is a symbiosis of physical optics and digital computers. In numerical reconstruction of optical holograms, optical wavefront is sampled, and obtained numerical data are transformed in computers for evaluating physical properties of objects that produced that wave front. In fabricating computer-generated holograms, numerical data produced by a computer are converted into a physical hologram or an optical element intended for forming real optical beams. Therefore mutual correspondence between optical transformations and their computer representations is of fundamental importance for digital holography. In the paper, this problem is addressed and different computer representations of basic optical transforms such as convolution, Fourier and Fresnel integral transforms are briefly reviewed.

  3. 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,

  4. FDTD analysis of photonic quasicrystals with different tiling geometries and fabrication by single beam computer-generated holography

    E-print Network

    Zito, G; Santamato, E; Marino, A; Tkachenko, V; Abbate, G

    2013-01-01

    Multiple-beam holography has been widely used for the realization of photonic quasicrystals with high rotational symmetries not achievable by the conventional periodic crystals. Accurate control of the properties of the interfering beams is necessary to provide photonic band-gap structures. Here we show, by FDTD simulations of the transmission spectra of 8-fold quasiperiodic structures, how the geometric tiling of the structure affects the presence and properties of the photonic band-gap for low refractive index contrasts. Hence, we show an interesting approach to the fabrication of photonic quasicrystals based on the use of a programmable Spatial Light Modulator encoding Computer-Generated Holograms, that permits an accurate control of the writing pattern with almost no limitations in the pattern design. Using this single-beam technique we fabricated quasiperiodic structures with high rotational symmetries and different geometries of the tiling, demonstrating the great versatility of our technique.

  5. 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.

  6. [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.

  7. Holography techniques and applications

    SciTech Connect

    Not Available

    1988-01-01

    This book contains papers presented at a conference on holography techniques and applications. The topics covered include: holography with a frequency-doubled Nd:YAG laser; multiplex holograms from scanning electron microscope; and some applications of LCD in holography.

  8. 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.

  9. Computing technology in the 1980's. [computers

    NASA Technical Reports Server (NTRS)

    Stone, H. S.

    1978-01-01

    Advances in computing technology have been led by consistently improving semiconductor technology. The semiconductor industry has turned out ever faster, smaller, and less expensive devices since transistorized computers were first introduced 20 years ago. For the next decade, there appear to be new advances possible, with the rate of introduction of improved devices at least equal to the historic trends. The implication of these projections is that computers will enter new markets and will truly be pervasive in business, home, and factory as their cost diminishes and their computational power expands to new levels. The computer industry as we know it today will be greatly altered in the next decade, primarily because the raw computer system will give way to computer-based turn-key information and control systems.

  10. Computers and Technological Forecasting

    ERIC Educational Resources Information Center

    Martino, Joseph P.

    1971-01-01

    Forecasting is becoming increasingly automated, thanks in large measure to the computer. It is now possible for a forecaster to submit his data to a computation center and call for the appropriate program. (No knowledge of statistics is required.) (Author)

  11. 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…

  12. Computing Technology Vendors Guide

    E-print Network

    Illinois at Urbana-Champaign, University of

    cutting-edge PC. Background The fundamental parts of any computer system are the motherboard, central that they are compatible with each other. This is especially true with the motherboard, processor and RAM. A great place

  13. Faculty of Computer Science & Technology

    E-print Network

    Haddadi, Hamed

    Faculty of Computer Science & Technology REVIEW OF THE YEAR 2007-08 Personnel Dr Cecilia Mascolo science in an entertaining way. The first prize, a visit to Google Zurich, was awarded to a pupil from Staton and Dr Bartek Klin were appointed to EPSRC Research Fellowships in Theoretical Computer Science

  14. 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.

  15. 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.

  16. Frequency analysis of digital holography

    Microsoft Academic Search

    Thomas M. Kreis

    2002-01-01

    A coherent optical imaging system consisting of recording a digital hologram by a CCD array and numerical reconstruction of the complex wave field in a computer is subjected to a frequency analysis. This analysis recognizes Fresnel and lensless Fourier transform holography; collimated and divergent reference waves; as well as the real image, the virtual image, and the dc term. The

  17. Automated compensation of fringe pattern in digital holography and TV holography

    NASA Astrophysics Data System (ADS)

    Kornis, János; Séfel, Richárd

    2009-06-01

    Digital holography and TV holography is the most promising tool for industrial applications. For a successful industrial measuring system automated evaluation is necessary. To develop this kind of measuring system the fringe compensation principle can be used. Because both digital holography and TV-holography operate with images recorded with a digital camera, several computer based compensation methods can be applied. In our investigations automated compensation techniques were investigated to develop industrial measuring systems. In digital holography the compensation method can be easier, using digital compensation, performing the compensation process in the computer using the recorded complex amplitude of the scattered light from the investigated object. In this case the compensation is based on the phase manipulation of the reconstructed waves. Digital compensation method was chosen for TV holography too. Previously developed fringe synthesizing method was applied in Tv holographic measurements. In this method a set of phase shifted fringe patterns of the investigated object is recorded. Using the recorded fringe systems new contour fringe pattern can be generated. Based on these methods, the evaluation program in digital holography or in TV holography can set the sensitivity of the measurement, can separate different deformation components (e.g. rotation, local deformation) after the measurement was performed. Measuring the separated deformation components new alternative output of the measurement can be generated: a list of the deformation components with its features.

  18. Business of holography is undergoing a paradigm shift

    NASA Astrophysics Data System (ADS)

    Fischbach, James C.

    1995-02-01

    The business of holography is undergoing a paradigm shift, a shift that will usher in great opportunity. What was once considered a limited technology will become a premier enabling technology. With the achievement of the holy grail of holography - full, true-color, real-time, holographic images - business uses of the three-dimensional images will increase dramatically. The advent of live, interactive, true-color holography will propel the market of holography to a 1.9 billion-a-year market by the end of the decade, up from about $180 million in 1994.

  19. Computed tomography: A versatile technology

    SciTech Connect

    Armistead, R.A.; Stanley, J.H. [Advanced Research and Applications Corp. , Sunnyvale, CA (United States)

    1997-02-01

    Improvements in the speed and accuracy of computed tomography (CT) systems, together with new developments in software, are changing the ways CT technology supports manufacturing operations. In addition to providing quantitative nondestructive inspection at the end of the manufacturing line, CT images are now also being compiled for reverse engineering and first-article characterization and certification. The enhanced performance of a state-of-the-art CT system makes it an effective complement to other digital data-based manufacturing technologies such as computer-aided design (CAD), computer-aided manufacturing (CAM), and computer-aided engineering (CAE). Furthermore, CT capabilities may be combined with those of rapid prototyping such as stereolithography, selective laser sintering, and direct metal deposition, to support the rapid, cost-efficient production of parts in small lots. This article describes how the system works, how it is used for inspection, and how it may assist with reverse engineering.

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

    E-print Network

    Sheridan, Scott

    Roadmap: Computer Technology ­ General Technology ­ Associate of Applied Business [RE to Computer Systems or COMT 11004 Survey of Information Technology or COMT 21007 Internet Ethics and Policies 11002 Visual Basic Programming 3 COMT 11006 Introduction to Web Site Technology 3 COMT 11009 Computer

  1. 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.

  2. 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.

  3. Chaos and fractals in digital holography

    NASA Astrophysics Data System (ADS)

    Wang, Tianji; Yang, Shining; Li, Yaotang; Zhang, Shichao; Fan, Shaowu; Wen, Huanrong

    1997-05-01

    Digital pixel holography on the basis of scalar diffraction theory has an effective security function in anti- counterfeiting technology. The digital pixel hologram is in reality a diffraction element. The digital pixel hologram is a laser lithographic image to produce high efficiency volume phase only computer generated holographic diffraction grating. The use of the Postscript language program and the chaos fractal patterns generating program as an interface between the mathematical coding and the laser lithographic device is effective, since this model has flexible and powerful security function for anti-counterfeiting technology. The Postscript files and chaos fractal patterns generating program can control the lithographic system which has a Postscript and chaos fractal patterns generating interpreter.

  4. Handbook of optical holography

    Microsoft Academic Search

    H. J. Caulfield

    1979-01-01

    This ten-chapter handbook deals with various important aspects of optical holography. Ten major areas are considered: (1) introduction to optical holography; (2) background; (3) classification of holograms; (4) major hologram types; (5) hologram variations; (6) image formation; (7) cardinal points and principal rays for holography; (8) equipment and procedures; (9) special problems; and (10) application areas. Topics of interest include

  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 Network Computing -- PVM -- MPI ffl Software Repositories -- Netlib -- High­Performance Software Exchange High Per­ formance Computing resources ffl The Grand Challenges of High Performance Comput­ ing

  6. Optimization of the switch-back technique used for fast occlusion-processing in computer holography

    NASA Astrophysics Data System (ADS)

    Masuda, Sachio; Matsushima, Kyoji; Nakahara, Sumio

    2015-03-01

    A method called the switch-back technique allows us to drastically reduce computation time of occlusion-processing based on the polygon-by-polygon silhouette light-shielding. It is also reported that further reduction of computation time can be achieved by splitting an object to some sub-models along with depth direction. However, computational cost for numerical propagation between the sub-models increases with increasing the number of sub-models. As a result, there is an optimum number of sub-models. In this paper, we propose a technique to predict the optimum number of sub-models by estimating the total computational complexity of the switch-back technique with object splitting.

  7. Computers [1999 technology forecast and analysis

    Microsoft Academic Search

    A. Dutta-Roya

    1999-01-01

    This paper presents a computer technology analysis and forecast for 1999. The subjects covered include personal computers, magnetic disk storage, open operating systems, digital versatile disks and supercomputers

  8. Leadership Training in Computer Technology. [Resource Materials.

    ERIC Educational Resources Information Center

    American Speech-Language-Hearing Association, Rockville, MD.

    This manual contains papers written as part of a project to develop faculty leadership in the infusion of computer technology into graduate-level curricula in communication disorders. Titles and authors are (1) "Computer Technology in the Practice of Special Education: A General Introduction" (M. Budoff); (2)"Computer Technology in the Practice of…

  9. 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.

  10. Testing Helioseismic Holography

    NASA Astrophysics Data System (ADS)

    MacBeth, Jamie

    The recent advent of "helioseismic holography" or "acoustic imaging" as it has sometimes been called, has provided a rich new set of techiniques and phenomena to aid local helioseismology. Through the application of these techniques to SOHO-MDI observations, strange new signatures - the "acoustic moat" and "acoustic glories" - have been documented but difficult to understand (Braun et al. 1998). In addition, by comparing the depth diagnostics between observations and simulations of an active region introducing random noise to a solar atmosphere through the ray approximation, it has been suggested that the refraction or absortion of p-modes in sunspots is primarily superficial. The purpose of this study is to better understand helioseismic holography through more testing. More specifically we propose a normal mode approach to generating artificial datasets. By solving the wave equation on the sphere with a sound speed perturbation resembling an active region, and summing the perturbed eigenfunctions in fourier space with the corresponding eigenfrequencies, we hope to construct an artificial dataset that more closely resembles the real thing. Although thousands of solar p-modes need to be considered, as well as millions (or more) of points in the resulting artificial dataset to be used, we aspire to make this possibly computationally expensive venture practical. With this method we hope to better test the depth, frequency, and pupil size diagnostics of acoustic images. This research is supported by NASA grant NAG5-3077 at Stanford University.

  11. Computer Technology and Architecture: An Evolving Interaction

    Microsoft Academic Search

    John L. Hennessy; Norman P. Jouppi

    1991-01-01

    The interaction between computer architecture and IC technology is examined. To evaluate the attractiveness of particular technologies, computer designs are assessed primarily on the basis of performance and cost. The focus is mainly on CPU performance, both because it is easier to measure and because the impact of technology is most easily seen in the CPU. The technology trends discussed

  12. Center for Computation & Technology at LSU

    E-print Network

    Allen, Gabrielle

    Center for Computation & Technology at LSU Gabrielle Allen Assoc. Prof. Computer Science Asst. Dir #12;7 Research Areas · HPC and programming environments ­ Cactus Computational Toolkit · Grid) ­ Coastal Modeling (SCOOP/DynaCode) #12;· Research · Education · Leading Facilities ­ Supermike, LONI

  13. Gordon Research Conference on Holography and Optical Information Processing

    NASA Astrophysics Data System (ADS)

    Walkup, John F.

    1991-09-01

    The 1991 Gordon Research Conference on Holography and Optical Information Processing was held on 17-21 June, 1991 at Plymouth State College in Plymouth, NH. The talks on Ultrafast Optical Logic Using Solitons and Optical Processing with Planar Optics pointed out the significant progress being made by various Bell Labs investigators on various aspects of optical computing. Professor Sing Lee from the University of California-San Diego gave an excellent overview of some engineering and performance Issues in optoelectronic computing. It is clear that the Soviets have made considerable progress on multi transducer acousto-optic spectrum analyzers. It is also clear that the Japanese government is planning to continue to make optical computing one of its high priority areas, with its NIPT (New Information Processing Technology project), and are projected to continue to investigate so called sixth generation computer technologies.

  14. 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.

  15. 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.

  16. Lensless imaging by spatial Fourier synthesis holography.

    PubMed

    Arons, E; Dilworth, D

    1996-02-10

    The technique of Fourier synthesis holography is extended to the spatial domain. A spatially extended source is decomposed into its Fourier components, and a hologram of an object distribution is formed at each spatial frequency and stored in a computer. Upon synthesis in the computer a clear image can be formed of the object without the use of lenses. PMID:21069067

  17. Review of cooling technologies for computer products

    Microsoft Academic Search

    Richard C. Chu; Robert E. Simons; Michael J. Ellsworth; Roger R. Schmidt; Vincent Cozzolino

    2004-01-01

    This paper provides a broad review of the cooling technologies for computer products from desktop computers to large servers. For many years cooling technology has played a key role in enabling and facilitating the packaging and performance improvements in each new generation of computers. The role of internal and external thermal resistance in module level cooling is discussed in terms

  18. Center for Computational Structures Technology

    NASA Technical Reports Server (NTRS)

    Noor, Ahmed K.; Perry, Ferman W.

    1995-01-01

    The Center for Computational Structures Technology (CST) is intended to serve as a focal point for the diverse CST research activities. The CST activities include the use of numerical simulation and artificial intelligence methods in modeling, analysis, sensitivity studies, and optimization of flight-vehicle structures. 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 key elements of the Center are: (1) conducting innovative research on advanced topics of CST; (2) acting as pathfinder by demonstrating to the research community what can be done (high-potential, high-risk research); (3) strong collaboration with NASA scientists and researchers from universities and other government laboratories; and (4) rapid dissemination of CST to industry, through integration of industrial personnel into the ongoing research efforts.

  19. Gabrielle Allen Center for Computation & Technology

    E-print Network

    Allen, Gabrielle

    System for Coastal & Environmental Modeling Louisiana Coastal Area · 1927 flood, levees, loss of wetlands1 Gabrielle Allen Center for Computation & Technology Dept Computer Science Louisiana State, growing crisis, social impact ­ 25% lost wetlands in last century, future predictions dire; increases

  20. 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 ...

  1. 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

  2. Digital photography and computer technology : a promising field of innovation 1 Digital photography and computer technology

    E-print Network

    Donsez, Didier

    photography and computer technology : a promising field of innovation 3 D igital C am era PC TV+STB Hom e AreaDigital photography and computer technology : a promising field of innovation 1 Digital photography: (+33) 320 43 42 56 {vcord,lecomte}@lifl.fr #12;Digital photography and computer technology

  3. Computer Technology and Education: A Policy Delphi.

    ERIC Educational Resources Information Center

    Steier, Lloyd P.

    Realizing the educational potential of computer technology largely depends on developing appropriate policies related to the technology. A Policy Delphi method was used to identify changes in education that are both probable and possible on account of the introduction of computers, and to explore potential patterns for arriving at a desired…

  4. Gabrielle Allen Center for Computation & Technology

    E-print Network

    Allen, Gabrielle

    Gabrielle Allen Center for Computation & Technology Dept Computer Science Louisiana State solutions, deploy ensembles of models on the Grid, assemble realtime results with GIS technologies. · Three (Peak Winds : 120 mph ) on 24th Sep, 2:40 am CDT, Texas Louisiana Border Category 3 landfall (Peak Winds

  5. Prior Computer Experience and Technology Acceptance

    ERIC Educational Resources Information Center

    Varma, Sonali

    2010-01-01

    Prior computer experience with information technology has been identified as a key variable (Lee, Kozar, & Larsen, 2003) that can influence an individual's future use of newer computer technology. The lack of a theory driven approach to measuring prior experience has however led to conceptually different factors being used interchangeably in…

  6. Imaging use Holography in the Universe

    E-print Network

    Dong, Jiang

    2008-01-01

    Holography is 3D imaging which can record intensity and phase at the same time. The important of construct hologram is holographic recording and wavefront reconstruction. In recently, it is surprise that holography be discovered in study interstellar scintillation for pulsar provide a coherent light source. I think that is speckle hologram and speckle interference(i.e. intensity interference), and use modern technique which include phased array,CCD, digital signal processing and supercomputer can achieve that digital and computer holography from radio to X-ray astronomy.This means we can use it image the universe and beyond the limited of telescope for cosmos provide much coherent light from pulsar,maser, black hole to 21cm recombination line. It give a probe to the medium of near the black hole et al. From those coherent light sources in the sky,we can uncover one different universe that through astronomical quantum observation which use intensity interference.

  7. 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

  8. 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…

  9. Holography Without Photography Thad G. Walker

    E-print Network

    Walker, Thad G.

    only dark or transparent pixels output by a laser printer. The binary representation would work best/amplitude plate, computer-generated holography attempts to find a suitable binary encoding of the (complex is placed in front of a lens and illuminated by a plane wave of light, the Fraunhofer diffraction pat- tern

  10. Emerging Computing Technologies in High Energy Physics

    E-print Network

    Amir Farbin

    2009-10-19

    While in the early 90s High Energy Physics (HEP) lead the computing industry by establishing the HTTP protocol and the first web-servers, the long time-scale for planning and building modern HEP experiments has resulted in a generally slow adoption of emerging computing technologies which rapidly become commonplace in business and other scientific fields. I will overview some of the fundamental computing problems in HEP computing and then present the current state and future potential of employing new computing technologies in addressing these problems.

  11. 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

  12. High Performance Computing Technologies Jack Dongarra

    E-print Network

    Dongarra, Jack

    1 High Performance Computing Technologies Jack Dongarra University of Tennessee Oak Ridge National of investigating the world Current generation of high performance computers are making an impact in many areas are not so di erent from those in business ...? 10 High-Performance Computing Today In the past decade

  13. 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…

  14. Applications of Computer Technology in Intercollegiate Debate.

    ERIC Educational Resources Information Center

    Kay, Jack, Ed.

    1986-01-01

    Focusing on how computers can and should be used in intercollegiate forensics, this journal issue offers the perspectives of a number of forensics instructors. The lead article, "Applications of Computer Technology in Intercollegiate Debate" by Theodore F. Sheckels, Jr., discusses five areas in which forensics educators might use computer…

  15. Real-time color holography system for live scene using 4K2K video system

    NASA Astrophysics Data System (ADS)

    Yamamoto, Kenji; Mishina, Tomoyuki; Oi, Ryutaro; Senoh, Takanori; Kurita, Taiichiro

    2010-02-01

    We are studying electronic holography and have developed a real-time color holography system for live scene which includes three functional blocks, capture block, processing block, and display block. In this paper, we will introduce our developed system after describing basic idea that quickly calculates hologram from IP image. The first block, capture block, uses integral photography (IP) technology to capture color 3-D objects under natural light in real time. The second block, processing block, consists of four general personal computers to generate holograms from IP images in real time. Three half-zone-plated holograms for red, green and blue (RGB) channels are generated for all captured IP images by using fast Fourier Transform. The last block, display block, mainly consists of three liquid crystal displays to display the holograms and three laser sources for RGB to reconstruct the color 3-D objects. All blocks work in real time, i.e., in 30 color frames per second.

  16. 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).

  17. A real-time color holography system for live scene

    NASA Astrophysics Data System (ADS)

    Yamamoto, Kenji; Mishina, Tomoyuki; Oi, Ryutaro; Senoh, Takanori; Okui, Makoto

    2009-02-01

    We are studying electronic holography and have developed a real-time color holographic movie system which includes three functional blocks, capture block, processing block, and display block. We will introduce the system and its technology in this paper. The first block, capture block, uses integral photography (IP) technology to capture color 3-D objects in real time. This block mainly consists of a lens array with approximately 120(W)x67(H) convex lenses and a video camera with 1920(W)x1080(H) pixels to capture IP images. In addition to that, the optical system to reduce the crosstalk between elemental images is mounted. The second block, processing block, consists of two general personal computers to generate holograms from IP images in real time. Three half-zone-plated holograms for red, green and blue (RGB) channels are generated for each frame by using Fast Fourier Transform. The last block, display block, mainly consists of three liquid crystal displays for displaying the holograms and three laser sources for RGB to reconstruct the color 3-D objects. This block is a single-sideband holography display, which cuts off conjugate and carrier images from primary images. All blocks work in real time, i.e., in 30 frames per second.

  18. (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.

  19. Imaging technique for three-dimensional microstructure by digital holography

    Microsoft Academic Search

    Huaying Wang; Jie Zhao; Guangjun Wang; Yizhuo Zhang; Dayong Wang

    2008-01-01

    Digital holography is a whole-field, non-contact, and highly sensitive interferometric imaging and testing technology. It is more suitable for microscopic measurement owing to digitalization and flexibility in holograms recording, storage, reconstruction and transmittance. This paper analyzes the factors which lead to the phase aberrations in the off-axis lensless Fourier transform digital holography firstly. Then a method, which is obtained by

  20. 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.

  1. Connection Between Phase-Sensitive Holography and Time-Distance Helioseismology

    NASA Astrophysics Data System (ADS)

    Gizon, L.; Birch, A. C.; Jensen, J. M.

    2001-05-01

    The temporal cross-correlation measured by phase-sensitive holography (Braun & Lindsey, 2000) is a weighted average of cross-correlations between pairs of points in the pupil. We derive a technique to compute wave-based travel-time sensitivity kernels for phase-sensitive holography. We finally comment on the spatial resolution of both phase-sensitive holography and time-distance helioseismology.

  2. Technology computer aided design characterization needs and requirements

    E-print Network

    Florida, University of

    Technology computer aided design characterization needs and requirements Mark E. Law Department 1995; accepted 2 August 1995 Technology computer aided design TCAD promises predictive calculations on the characterization community? © 1996 American Vacuum Society. I. INTRODUCTION Technology computer aided design TCAD

  3. 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.

  4. High-resolution lensless Fourier transform holography for microstructure imaging

    Microsoft Academic Search

    Jie Zhao; Dayong Wang; Huaying Wang; Jianjun Xie

    2007-01-01

    Digital holography combines the advantages of the optical holography and the computers. It can implement an all-digital processing and has the quasi real-time property. With lensless Fourier transform recording architecture, the limited bandwidth of CCD camera can be utilized sufficiently, and the sampling theorem is satisfied easily. Therefore, high-resolution can be achieved. So it is preferred in the microstructure imaging.

  5. 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.

  6. Holography for ${\\cal N}=2^*$ on $S^4$

    E-print Network

    Nikolay Bobev; Henriette Elvang; Daniel Z. Freedman; Silviu S. Pufu

    2013-11-06

    We find the gravity dual of $\\mathcal{N}=2^*$ super-Yang-Mills theory on $S^4$ and use holography to calculate the universal contribution to the corresponding $S^4$ free energy at large $N$ and large 't Hooft coupling. Our result matches the expression previously computed using supersymmetric localization in the field theory. This match represents a non-trivial precision test of holography in a non-conformal, Euclidean signature setting.

  7. Study of key technology of ghost imaging via compressive sensing for a phase object based on phase-shifting digital holography

    NASA Astrophysics Data System (ADS)

    Leihong, Zhang; Dong, Liang; Bei, Li; Zilan, Pan; Dawei, Zhang; Xiuhua, Ma

    2015-07-01

    In this article, the algorithm of compressing sensing is used to improve the imaging resolution and realize ghost imaging via compressive sensing for a phase object based on the theoretical analysis of the lensless Fourier imaging of the algorithm of ghost imaging based on phase-shifting digital holography. The algorithm of ghost imaging via compressive sensing based on phase-shifting digital holography uses the bucket detector to measure the total light intensity of the interference and the four-step phase-shifting method is used to obtain the total light intensity of differential interference light. The experimental platform is built based on the software simulation, and the experimental results show that the algorithm of ghost imaging via compressive sensing based on phase-shifting digital holography can obtain the high-resolution phase distribution figure of the phase object. With the same sampling times, the phase clarity of the phase distribution figure obtained by the algorithm of ghost imaging via compressive sensing based on phase-shifting digital holography is higher than that obtained by the algorithm of ghost imaging based on phase-shift digital holography. In this article, this study further extends the application range of ghost imaging and obtains the phase distribution of the phase object.

  8. An Introduction to Educational Holography.

    ERIC Educational Resources Information Center

    Lloyd, R. Scott

    Holograms are capable of taking the two-dimensional ways of envisioning information to another dimension of presentation, representation, and conceptualization. Educational holography is joining display holography, holographic testing of materials, and holographic optical elements as a fourth major field in holography. Holograms are explored as…

  9. Human computer interactions using language based technology

    Microsoft Academic Search

    Victor W. Zue

    1994-01-01

    Spoken language offers an attractive alternative for human computer interface, since speech is the most natural, efficient, flexible, and economical means of communication among humans. To provide this interface, however, speech recognition technology must be combined with natural language processing technology, so that the verbal input can not only be recognized, but also understood, and appropriate actions can be taken.

  10. Computer Technology and Maintenance Curriculum. Final Report.

    ERIC Educational Resources Information Center

    Manchester Community Coll., CT.

    A project was conducted by Manchester Community College and Howell Cheney Vocational Technical School in Connecticut to develop a joint curriculum for a two-year computer technology and maintenance program. During the year the project was conducted, a high technology advisory council was formed, consisting of industry and faculty representatives…

  11. InformationTechnology ITCSand Computing Services

    E-print Network

    software), and lynda.com (www.ecu.edu/lynda). Visit the ITCS Training Web site for more informationInformationTechnology ITCSand Computing Services www.ecu.edu/itcs Technology Services at ECU Store up to 40GB of files on your secure ECU Piratedrive (www.ecu.edu/piratedrive), easy to access

  12. Children and Computers: New Technology— Old Concerns

    Microsoft Academic Search

    Ellen A. Wartella; Nancy Jennings; Walter Cronkite Regents

    2000-01-01

    Computer technology has ushered in a new era of mass media, bringing with it great promise and great concerns about the effect on children's development and well- being. Although we tend to see these issues as being new, similar promises and con- cerns have accompanied each new wave of media technology throughout the past century: films in the early 1900s,

  13. Computer technology for autistic students

    Microsoft Academic Search

    Marion V. Panyan

    1984-01-01

    The first purpose of this article is to review the literature related to the use of computers with autistic individuals. Although\\u000a only a limited number of applications have been reported, the potential of the computer to facilitate the progress of autistic\\u000a persons is promising. The second purpose is to identify specific learning problems or styles associated with autism from the

  14. Computer Technologies 1.An Alien Autopsy

    E-print Network

    North Carolina at Chapel Hill, University of

    , Word Processing, Email, Media Player · Shared Libraries - Opening a URL, MP3 coding & decoding, video · · Mobile phones · · Toasters, irons, wristwatches, happy-meal toys #12;A Computer System · What;Implementation Technology · Common Links? · A controllable switch · Computers are wires and switches #12;Chips

  15. Ubiquitous Computing Technologies for Ubiquitous Learning

    Microsoft Academic Search

    Ken Sakamura; Noboru Koshizuka

    2005-01-01

    Ubiquitous computing is a new information and communication technology that utilize a large number of cooperative small nodes with computing and\\/or communication capabilities such as handheld terminals, smart mobile phones, sensor network nodes, contactless smart cards, RFIDs (radio frequency identification), and so on. This paper proposes the concept of ubiquitous learning that enables anyone to learn at anytime and anywhere

  16. Computers and Writing. Tech Use Guide: Using Computer Technology.

    ERIC Educational Resources Information Center

    Dalton, Bridget

    One of nine brief guides for special educators on using computer technology, this guide focuses on the use of computers to improve skills and attitudes in writing instruction. Pre-writing tools such as group brainstorming, story webs, free-writing, journal entries, and prewriting guides help generate ideas and can be carried out either on or off…

  17. 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.

  18. 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.

  19. Haptic Holography/Touching the Ethereal

    NASA Astrophysics Data System (ADS)

    Page, Michael

    2013-02-01

    Haptic Holography, was perhaps, first proposed by workers at MIT in the 90s. The Media Lab, headed up by Dr. Stephen Benton, with published papers by Wendy Plesiak and Ravi Pappuh. -1 Recent developments in both the technology of digital holography and haptics have made it practical to conduct further investigations. Haptic holography is auto-stereoscopic and provides co-axial viewing for the user. Haptic holography may find application in medical & surgical training and as a new form of synthetic reality for artists and designers. At OCAD's PHASE Lab (Prototypes for Holographic Art and Science Explorations) workers are exploring hybrid forms of augmented reality, that combine haptics, interactivity and auto-stereoscopic imagery. Conventional Haptic environments, while presenting a 3D physics environment, typically provide a 2D visual work/play space. Orienteering in such an environment creates an uncertain spatial relationship for the user. Our group creates 3d models from which we create holographic constructs. The same model is used to create the physics environment. The two models are super-imposed. The result: Holograms you can touch.

  20. Faculty of Computer Science & Technology

    E-print Network

    Haddadi, Hamed

    . Intel closed their research laboratory in Cambridge and vacated their premises in the William Gates £3.8m, up from £1.3m in 2000-01 before the move to West Cambridge. The Cambridge Computer Lab Ring of Engineering's Division B. Cambridge Enterprise continued to occupy part of the second floor, paying rent

  1. 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.

  2. 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

  3. Roadmap: Technical and Applied Studies Computer Technology Applied Computer Security and Forensics Technology

    E-print Network

    Khan, Javed I.

    Roadmap: Technical and Applied Studies ­ Computer Technology Applied Computer Security and Forensics Technology ­ Bachelor of Technical and Applied Studies [RE-BTAS-TAS-CTAC] Regional College Catalog Requirement 3 See Kent Core Summary on page 2 Kent Core Requirement 3 See Kent Core Summary on page 2 Applied

  4. Electrostatic properties of insulators in three-dimensions using transmission electron holography tomography.

    E-print Network

    Dunin-Borkowski, Rafal E.

    tomography. L.C. Gontard1 , R.E. Dunin Borkowski2 T. Kasama3 1.Instituto de Ciencia de Materiales de Sevilla.cervera@icms.csic.es Keywords: electrostatics, tomography, holography Electron holography tomography (EHT) [1,2] is applied here calculated using Maxwell equations. The electric field can be computed with the equation Neglecting

  5. 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.

  6. Holography in the '90s

    NASA Astrophysics Data System (ADS)

    Jeong, Tung H.

    1991-03-01

    Laser holography has been around since the early '60s('). The dazzling displays shown by Leith and Upatniek took the world by storm. Since then, due to fundamental limitations within the field and questionable business expectations of entrepreneurs, the pace of developing slowed down. Nevertheless, steady progress on both technical and business fronts are continuously made. In the '90s, we fully expect the fruition to take place both in the laboratory and the market place. New areas of applications are beginning to emerge, notably with respect to computers and computing, anti-counterfeiting, holographic optical elements (HOE), non-destructive testing (HNDT), multi-color display, high resolution (in space and time) imaging, quality control, and education. What follows is a brief discussion, in the above order, of each of these areas with some reasonable extrapolation of further developments during this decade.

  7. Anonymous RFID Authentication Using Trusted Computing Technologies

    Microsoft Academic Search

    Kurt Dietrich

    2010-01-01

    \\u000a Anonymity protecting mechanisms are an important part of any Trusted Computing platform. They provide protection of a platform’s\\u000a anonymity and, consequently, protection of the privacy of the platform’s owners. As Trusted Computing technologies have been\\u000a introduced on mobile and embedded systems and more and more mobile devices are equipped with Near Field Communication (NFC)\\u000a modules, the question arises whether the

  8. Business/Computer Technologies. State Competency Profile.

    ERIC Educational Resources Information Center

    Ohio State Univ., Columbus. Center on Education and Training for Employment.

    This document contains 272 competencies, grouped into 36 units, for tech prep programs in the business/computer technology cluster. The competencies were developed through collaboration of Ohio business, industry, and labor representatives and secondary and associate degree educators. The competencies are rated either "essential" (necessary to…

  9. Oasis cooling packaging technology for notebook computers

    Microsoft Academic Search

    G. Kuzmin

    1994-01-01

    It is imperative that designers, OEMs and systems integrators address system-wide thermal issues, and do it from the earliest stages of product design. As this technique is practised, engineers will be working with a broader array of technologies and disciplines than ever before. Consumer demand for powerful, portable computing products is the major driving force for new thermal techniques, An

  10. Computer Engineering Technology. Florida Vocational Program Guide.

    ERIC Educational Resources Information Center

    University of South Florida, Tampa. Dept. of Adult and Vocational Education.

    This packet contains a program guide and Career Merit Achievement Plan (Career MAP) for the implementation of a computer engineering technology program in Florida secondary and postsecondary schools. The program guide describes the program content and structure, provides a program description, lists job titles under the program, and includes a…

  11. Instructional Technology in Computer Science Education

    ERIC Educational Resources Information Center

    Jenny, Frederick J.

    2004-01-01

    The Web, the Internet, the intranet and associated resources, campus computer labs, smart classrooms, course management systems, and a plethora of software packages all offer opportunities for every classroom instructor to enrich in-class and out-of-class activities. Why should an instructor consider the integration of technology into their…

  12. Designing Appropriate Computing Technologies for Rural Development

    E-print Network

    Parikh, Tapan S.

    Designing Appropriate Computing Technologies for Rural Development Tapan S. Parikh Department billion people in the rural developing worlddeveloping world need the sameneed the same of relations 3 billion people in the rural3 billion people in the rural developing worlddeveloping world have

  13. Turbulence and Holography

    E-print Network

    Vishnu Jejjala; Djordje Minic; Y. Jack Ng; Chia-Hsiung Tze

    2008-06-30

    We examine the interplay between recent advances in quantum gravity and the problem of turbulence. In particular, we argue that in the gravitational context the phenomenon of turbulence is intimately related to the properties of spacetime foam. In this framework we discuss the relation of turbulence and holography and the interpretation of the Kolmogorov scaling in the quantum gravitational setting.

  14. Fourier transform digital holography

    Microsoft Academic Search

    Dan Apostol; Adrian Sima; Petre C. Logofatu; Florin Garoi; Victor Damian; Victor Nascov; Iuliana Iordache

    2007-01-01

    In this paper a Fourier transform digital holography experimental arrangement is presented. It is actually a hybrid arrangement, half digital half analog. The Fourier hologram was constructed using the analogous means of the so called lensless configuration. The hologram was recorded digitally by a camera with a large CCD array in stead of the recording medium. The recording of the

  15. Holography and space research

    Microsoft Academic Search

    Pal Greguss

    1998-01-01

    After reviewing how holographic techniques opened new vistas in space flight and research we discuss the influence of Centric Minded Imaging on holography related metrology, and propose for the first time an omnidirectional holographic Fourier spectrometer that could be a good candidate to study specific chemical reactions, such as the natural destruction of ozone in the upper atmosphere, and especially

  16. Digital Holography Display (2)

    Microsoft Academic Search

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

    2011-01-01

    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

  17. Welcome to Computing at UNCG! Information Technology Services

    E-print Network

    Saidak, Filip

    Welcome to Computing at UNCG! Information Technology Services Welcome to computing at UNCG! Technology has become a major part of life of UNCG. You will find yourself using computers and the UNCG in Jackson Library or the Technology Support Center located in 101 Forney Building. Ethical Use of Computing

  18. 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.

  19. Maximizing a transport platform through computer technology.

    PubMed

    Hudson, Timothy L

    2003-01-01

    One of the most recent innovations coalescing computer technology and medical care is the further development of integrated medical component technology coupled with a computer subsystem. One such example is the self-contained patient transport system known as the Life Support for Trauma and Transport (LSTAT(tm)). The LSTAT creates a new transport platform that integrates the most current medical monitoring and therapeutic capabilities with computer processing capacity, creating the first "smart litter". The LSTAT is built around a computer system that is network capable and acts as the data hub for multiple medical devices and utilities, including data, power, and oxygen systems. The system logs patient and device data in a simultaneous, time-synchronized, continuous format, allowing electronic transmission, storage, and electronic documentation. The third-generation LSTAT includes an oxygen system, ventilator, clinical point-of-care blood analyzer, suction, defibrillator, infusion pump, and physiologic monitor, as well as on-board power and oxygen systems. The developers of LSTAT and other developers have the ability to further expand integrative component technology by developing and integrating clinical decision support systems. PMID:12802947

  20. Foundations of computer forensics: A technology for the fight against computer crime

    Microsoft Academic Search

    Yun Wang; James Cannady; James Rosenbluth

    2005-01-01

    With the rapid advance in computer and network technology, computer-based electronic evidence has increasingly played an important role in the courtroom over the last decade. Computer forensics, a growing discipline rooted in forensic science and computer security technology, focuses on acquiring electronic evidence from computer systems to prosecute computer crimes, national security threats, and computer abuse. It has lost its

  1. NASA Future Computing and Communications Technologies

    NSDL National Science Digital Library

    A series of NASA Webcasts on Future Computing and Communications Technologies, broadcast live in April and May 2003, are now archived and viewable at this site. Each Webcast was approximately an hour in length and featured notable scientists and technology experts from NASA projects and laboratories. Originally intended for high school juniors and seniors, the presentations addressed issues such as spaceborne communications, nanotechnology, artificially evolving systems, and more. These Webcasts are an excellent resource to learn about NASA research from a high level perspective. This site is also reviewed in the September 26, 2003 NSDL MET Report.

  2. Spatially incoherent single channel digital Fourier holography

    E-print Network

    Rosen, Joseph

    Spatially incoherent single channel digital Fourier holography Roy Kelner* and Joseph Rosen.3010, 070.6120. In recent years we have witnessed noteworthy achieve- ments of incoherent holography techniques such as op- tical scanning holography [1] and Fresnel incoherent correlation holography (FINCH) [2

  3. 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.

  4. Workflow Technology and Human-Computer Interaction

    Microsoft Academic Search

    Dirk Draheim

    \\u000a The purpose of this chapter is to characterize workflow-intensive systems from a human-computer interaction viewpoint, i.e.,\\u000a it explains how a typical ITapplication is experienced by a user. It explains how a typical IT application structures the\\u000a work of its user. Therefore the notion of worklist is explained and how current workflow technology orchestrates applications\\u000a and programs that implement system dialogues

  5. Grid computing technology for hydrological applications

    NASA Astrophysics Data System (ADS)

    Lecca, G.; Petitdidier, M.; Hluchy, L.; Ivanovic, M.; Kussul, N.; Ray, N.; Thieron, V.

    2011-06-01

    SummaryAdvances in e-Infrastructure promise to revolutionize sensing systems and the way in which data are collected and assimilated, and complex water systems are simulated and visualized. According to the EU Infrastructure 2010 work-programme, data and compute infrastructures and their underlying technologies, either oriented to tackle scientific challenges or complex problem solving in engineering, are expected to converge together into the so-called knowledge infrastructures, leading to a more effective research, education and innovation in the next decade and beyond. Grid technology is recognized as a fundamental component of e-Infrastructures. Nevertheless, this emerging paradigm highlights several topics, including data management, algorithm optimization, security, performance (speed, throughput, bandwidth, etc.), and scientific cooperation and collaboration issues that require further examination to fully exploit it and to better inform future research policies. The paper illustrates the results of six different surface and subsurface hydrology applications that have been deployed on the Grid. All the applications aim to answer to strong requirements from the Civil Society at large, relatively to natural and anthropogenic risks. Grid technology has been successfully tested to improve flood prediction, groundwater resources management and Black Sea hydrological survey, by providing large computing resources. It is also shown that Grid technology facilitates e-cooperation among partners by means of services for authentication and authorization, seamless access to distributed data sources, data protection and access right, and standardization.

  6. CHSLT -Center for Holographic Studies and Laser micro-mechaTronics Mechanical Engineering Department/NEST -NanoEngineering, Science, and Technology

    E-print Network

    Furlong, Cosme

    Department/NEST - NanoEngineering, Science, and Technology In-line holography with divergent illumination Types of holograms In-line holography -- Gabor 1948 Recording #12;CHSLT - Center for Holographic Studies, and Technology In-line holography with collimated illumination Types of holograms In-line holography -- Gabor

  7. Computer technology-cognitive psychology interface and science performance assessment

    Microsoft Academic Search

    David D. Kumar; Stanley L. Helgeson; Arthur L. White

    1994-01-01

    The emerging interface between computer technology and cognitive psychology for performance assessment in science education\\u000a is explored. Cognitive theories of learning offer promises to transform computer technology from a test administration tool\\u000a into a process assessment tool, and computer technology offers a medium for studying the cognitive processes of learning.\\u000a Interface theories and interface technologies are briefly discussed. The technology-psychology

  8. Electron Holography of Magnetic Materials

    E-print Network

    Dunin-Borkowski, Rafal E.

    proposed as a means to compensate for lens aberrations and to improve electron microscope resolution (Gabor available on commercial electron microscopes. The earliest studies using electron holography were restricted-line and scanning TEM-based electron holography (Cowley, 1992), the most commonly-used form is the TEM mode of off

  9. Aberrations in Holography

    NASA Astrophysics Data System (ADS)

    Padiyar, D.; Padiyar, J.

    2013-02-01

    The Seidel aberrations are described as they apply to holography. Methods of recognition of an aberrated holographic reconstruction are described, as well as a recognition of the type of aberration. Experimental and theoretical strategies to minimize aberrations are discussed, including geometric considerations in the recording and reconstruction of holograms. Aberrations due to the recording of a hologram with one wavelength and reconstructing of it in another is also examined.

  10. A Brief History of Human Computer Interaction Technology

    E-print Network

    Myers, Brad A.

    A Brief History of Human Computer Interaction Technology Brad A. Myers December, 1996 CMU­CS­96­163 CMU­HCII­96­103 Human Computer Interaction Institute School of Computer Science Carnegie Mellon development of major advances in human­ computer interaction technology, emphasizing the pivotal role

  11. 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…

  12. SCHOOL OF ELECTRICAL AND COMPUTER ENGINEERING GEORGIA INSTITUTE OF TECHNOLOGY

    E-print Network

    Bennett, Gisele

    SCHOOL OF ELECTRICAL AND COMPUTER ENGINEERING GEORGIA INSTITUTE OF TECHNOLOGY 2001-2002A N N U A L engineering . . . . .977 Computer engineering-GTREP . . . . . . . . .26 Total electrical and computer engineering degree DEGREES AWARDED B

  13. Uncertainty-managed phase-shifting digital holography.

    PubMed

    Hahn, Joonku; Kim, Hwi

    2012-11-01

    Phase-shifting digital holography is a digital measurement technology of a complex optical field profile that uses focal plane array detectors without the loss of bandwidth. It has been known that the accuracy of phase-shifting digital holography is limited mainly by the phase tolerance of reference. In this Letter, it is revealed that the uncertainty in an expected signal is highly dependent on the phase of the signal itself, as well as the phase tolerance of the reference. Based on the uncertainty analysis, we propose a novel scheme of phase-shifting digital holography that exploits an uncertainty property to enhance the measurement accuracy even under significant reference phase tolerance. PMID:23114340

  14. Digital pixel cryptogram in e-beam holography

    NASA Astrophysics Data System (ADS)

    Wang, Tianji; Li, Yaotang; Yang, Shining; Feng, Hongan; Zhang, Shichao; Fan, Shaowu; Bao, Nai-Keng; Wong, Wai-Him; Chan, Hau P.; Chung, Po Sheun

    2000-03-01

    A digital pixel cryptogram technology using e-beam holography is described in this paper. The cryptogram is generated by an electronic beam lithography system and it can be applied to fabrication of embossing hologram for anti-counterfeiting and security.

  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. Reengineering materiel management using computer technology.

    PubMed

    Ehrlich, G; Springer, W H

    1995-08-01

    The Materiel Management Department in today's hospital is in a uniquely advantageous position. It can better support the hospital's mission by applying current techniques in material management systems automation together with current computing technology as part of a broad-based reengineering process. Materiel management executives, suppliers, software developers, and hardware manufacturers now have all the necessary tools to create and implement a flexible, cost-effective, complete, paperless system. The model system offers tremendous advantages in terms of increased productivity and reduced total cost. This article discusses the process and the tools and techniques that should be considered. PMID:10144189

  17. Twistorial Holography of Curvature-Invariant de Sitter Spin Currents

    E-print Network

    Binder, Bernd

    of qualitative correspondence between a gauge theory and gravity. Higher Holographic spin currents obtained by a twistorial holography gauge theory by Giombi and Yin (2010) have recently computed the holographic dual of a free (gauge) theory. Thirdly, the conjecture provides the first precise holographic dual

  18. Collimating beam shaper for holography and interferometry

    NASA Astrophysics Data System (ADS)

    Laskin, Alexander; Laskin, Vadim

    2013-03-01

    Beam shaping is important technique to improve holographic and interferometric technologies, and refractive field mapping beam shapers like piShaper demonstrate strong capabilities in increasing predictability and reliability as well simplifying the realization of the mentioned technologies. Most often the piShaper are implemented as telescopic systems with collimated beams at entrance and exit. At the same time the fiber-coupled TEM00 laser sources become more popular in holography and interferometry because of their high beam quality, reduced high frequency noise due to spatial filtering in a TEM00 fiber and convenience in usage. Therefore, the beam shapers should be compatible with those fiber-coupled lasers featured with high beam divergence. Basic piShaper design principles allow to implement a system combining the functions of beam shaping and collimation, as result divergent Gaussian laser beam from TEM00 fiber is transformed, almost lossless, to collimated flattop beam with low divergence, flat wave front, extended depth of field, reduced noise; such a beam is optimum for SLM-based technologies of CGH, Dot-Matrix mastering of security holograms, multi-colour Denisyuk holography, holographic data storage, holographic projection, lithography, interferometric techniques of Volume Bragg Gratings recording, periodic structuring, etc. Achromatic design of the telescopic and collimating beam shapers allows working with several laser sources with different wavelengths simultaneously that is, for example, important in multi-colour Denisyuk holography. This paper will describe some design basics of collimating refractive beam shapers of the field mapping type and optical layouts of their applying in holographic systems. Examples of real implementations and experimental results will be presented as well.

  19. Split-illumination electron holography

    SciTech Connect

    Tanigaki, Toshiaki; Aizawa, Shinji; Suzuki, Takahiro; Park, Hyun Soon [Advanced Science Institute, RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198 (Japan); Inada, Yoshikatsu [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Sendai 980-8577 (Japan); Matsuda, Tsuyoshi [Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012 (Japan); Taniyama, Akira [Corporate Research and Development Laboratories, Sumitomo Metal Industries, Ltd., Amagasaki, Hyogo 660-0891 (Japan); Shindo, Daisuke [Advanced Science Institute, RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198 (Japan); Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Sendai 980-8577 (Japan); Tonomura, Akira [Advanced Science Institute, RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198 (Japan); Okinawa Institute of Science and Technology, Graduate University, Onna-son, Okinawa 904-0495 (Japan); Central Research Laboratory, Hitachi, Ltd., Hatoyama, Saitama 350-0395 (Japan)

    2012-07-23

    We developed a split-illumination electron holography that uses an electron biprism in the illuminating system and two biprisms (applicable to one biprism) in the imaging system, enabling holographic interference micrographs of regions far from the sample edge to be obtained. Using a condenser biprism, we split an electron wave into two coherent electron waves: one wave is to illuminate an observation area far from the sample edge in the sample plane and the other wave to pass through a vacuum space outside the sample. The split-illumination holography has the potential to greatly expand the breadth of applications of electron holography.

  20. Terahertz digital holography image processing based on MAP algorithm

    NASA Astrophysics Data System (ADS)

    Chen, Guang-Hao; Li, Qi

    2015-04-01

    Terahertz digital holography combines the terahertz technology and digital holography technology at present, fully exploits the advantages in both of them. Unfortunately, the quality of terahertz digital holography reconstruction images is gravely harmed by speckle noise which hinders the popularization of this technology. In this paper, the maximum a posterior estimation (MAP) filter is harnessed for the restoration of the digital reconstruction images. The filtering results are compared with images filtered by Wiener Filter and conventional frequency-domain filters from both subjective and objective perspectives. As for objective assessment, we adopted speckle index (SPKI) and edge preserving index (EPI) to quantitate the quality of images. In this paper, Canny edge detector is also used to outline the target in original and reconstruction images, which then act as an important role in the evaluation of filter performance. All the analysis indicate that maximum a posterior estimation filtering algorithm performs superiorly compared with the other two competitors in this paper and has enhanced the terahertz digital holography reconstruction images to a certain degree, allowing for a more accurate boundary identification.

  1. Spacecraft computer technology at Southwest Research Institute

    NASA Technical Reports Server (NTRS)

    Shirley, D. J.

    1993-01-01

    Southwest Research Institute (SwRI) has developed and delivered spacecraft computers for a number of different near-Earth-orbit spacecraft including shuttle experiments and SDIO free-flyer experiments. We describe the evolution of the basic SwRI spacecraft computer design from those weighing in at 20 to 25 lb and using 20 to 30 W to newer models weighing less than 5 lb and using only about 5 W, yet delivering twice the processing throughput. Because of their reduced size, weight, and power, these newer designs are especially applicable to planetary instrument requirements. The basis of our design evolution has been the availability of more powerful processor chip sets and the development of higher density packaging technology, coupled with more aggressive design strategies in incorporating high-density FPGA technology and use of high-density memory chips. In addition to reductions in size, weight, and power, the newer designs also address the necessity of survival in the harsh radiation environment of space. Spurred by participation in such programs as MSTI, LACE, RME, Delta 181, Delta Star, and RADARSAT, our designs have evolved in response to program demands to be small, low-powered units, radiation tolerant enough to be suitable for both Earth-orbit microsats and for planetary instruments. Present designs already include MIL-STD-1750 and Multi-Chip Module (MCM) technology with near-term plans to include RISC processors and higher-density MCM's. Long term plans include development of whole-core processors on one or two MCM's.

  2. Large-format holography

    NASA Astrophysics Data System (ADS)

    Ratcliffe, David

    1998-02-01

    A review of the techniques and systems used and developed at Australian Holographics to make large format CW reflection (to 1.1. m X 1.1 m) and rainbow (to 1.1 m X 2.2 m) holograms will be given. Topics such as film holding, optical table design, optical schemes and geometries, the construction of large mirror towers, laser choice and installation, object choice and design, the use of unstable curtains, chemistry, drying and final product mounting will be covered. Pulsed holography as used by Australian Holographics will be briefly mentioned and its relative advantages and disadvantages compared to CW.

  3. Holography in Germany

    NASA Astrophysics Data System (ADS)

    Ackermann, Gerhard K.

    1995-02-01

    Besides the surprising fact that already three years are gone again, it is a good idea to stop for a moment and look back: What has been accomplished in this time span? What is important to mention? There are many good and promising developments. Some of them are presented in other talks at the Lake Forest meeting. But besides those promising experiences there are some questions about the holographic market in Germany. Comments are made on education, fine- art, research and development and commercial holography.

  4. DSN Microwave Antenna Holography

    NASA Technical Reports Server (NTRS)

    Rochblatt, D. J.; Seidel, B. L.

    1984-01-01

    The DSN microwave antenna holography project will obtain three-dimensional pictures of the large DSN antenna surfaces. These pictures must be of suffi icient resolution to allow adjustment of the reflector panels to an rms surface of 0.5 mm (0.25 mm, goal). The major parameters and equations needed to define a holographic measurement system are outlined and then the proof of concept demonstration measurement that was made at DSS-43 (Australia) that resulted in contour maps with spatial resolution of 7 m in the aperture plane and resolution orthogonal to the aperture plane of 0.7 mm was discussed.

  5. Computing, Information, and Communications Technology (CICT) Program Overview

    NASA Technical Reports Server (NTRS)

    VanDalsem, William R.

    2003-01-01

    The Computing, Information and Communications Technology (CICT) Program's goal 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 communication technologies

  6. Examples of Using Computer Technology in Mathematics Education

    Microsoft Academic Search

    Yixun Shi

    2009-01-01

    This paper presents several examples of using computer technology to make teaching and learning mathematics more effectively and efficiently. These examples show that technology will allow teachers to lead much more in-depth discussions in class. The use of computer technology in classrooms may in general raise studentspsila interests in mathematics, and enhance their problem solving skills.

  7. Using Type II Computer Network Technology To Reach Distance Students.

    ERIC Educational Resources Information Center

    Eastmond, Dan; Granger, Dan

    1998-01-01

    This article, in a series on computer technology and distance education, focuses on "Type II Technology," courses using textbooks and course guides for primary delivery, but enhancing them with computer conferencing as the main vehicle of instructional communication. Discusses technology proficiency, maximizing learning in conferencing…

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

    E-print Network

    Sheridan, Scott

    Roadmap: Applied Engineering ­ Computer Engineering Technology - Bachelor of Science [AT Technology 3 Semester Eight: [13 Credit Hours] TECH 43222 Computer Hardware Engineering and Architecture 3-BS-AENG-CET] College of Applied Engineering, Sustainability and Technology Catalog Year: 2012-2013 Page 1 of 2 | Last

  9. E-Learning with Computer Technology in Handicapped Higher Education

    Microsoft Academic Search

    Li Bian

    2009-01-01

    E-learning is flexible learning using computer network resources, tools and applications, and focusing on interaction among teachers, learners, and the online environment and on collaborative learning. This paper presents and analyzes e- learning with computer technology in handicapped higher education. Computer technologies have become an intrinsic and important aspect of teaching and learning in our digital and networked society. In

  10. 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…

  11. 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…

  12. Multi-field inflation from holography

    E-print Network

    Jaume Garriga; Kostas Skenderis; Yuko Urakawa

    2014-10-13

    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.

  13. Multi-field inflation from holography

    E-print Network

    Garriga, Jaume; Urakawa, Yuko

    2014-01-01

    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.

  14. 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.

  15. Art of color holography: pioneers in change

    NASA Astrophysics Data System (ADS)

    Richardson, Martin J.; Bjelkhagen, Hans I.

    2000-10-01

    The possibility to easily record full color holograms, (simply color holograms) has opened new possibilities for art holographers. This paper includes details concerning preparation of subject matter and its practical suitability for color holographic recordings from practical working sessions at ARTCAPI Atelier de Recherche Technique et de Creation Artistique en Physique et en Informatique in France. Martin Richardson as invited artist and Hans Bjelkhagen as scientist holographer describe color holography to a wider public audience through artistic display. Both directly recorded true color images and computer-generated images based on the ZEBRA printing technique are to be presented.

  16. Holography and strongly correlated systems

    E-print Network

    Iqbal, Nabil

    2011-01-01

    In this thesis we apply techniques arising from string theory - gauge-gravity/duality, or holography - to problems associated with strongly coupled quantum field theories under extreme conditions such as finite temperature ...

  17. Acquisition of three-dimensional information of minute object by digital holography

    Microsoft Academic Search

    Baoqun Zhao; Aili Qin; Huaying Wang

    2009-01-01

    Digital holography is a new three-dimensional imaging and measurement technology. The acquisition method of three-dimensional information for minute object by digital holography is analyzed. The wavefront recording and reconstruction with off-axis configuration including lensless Fourier and Fresnel with pre-magnification is investigated. The experiments with the two recording setups have been conducted for a same minute object. Both the intensity and

  18. Michigan Technological University Department of Computer Science

    E-print Network

    . Other areas are: cybersecurity, human-centered computing, computer and cyber- physical systems, wireless://www.jobs.mtu.edu/postings/2060. Applications for the cybersecurity, human-centered computing, computer and cyber-physical systems

  19. MICHIGAN TECHNOLOGICAL UNIVERSITY Department of Electrical and Computer Engineering

    E-print Network

    MICHIGAN TECHNOLOGICAL UNIVERSITY Department of Electrical and Computer Engineering Faculty Position in NextGeneration Energy Systems The Department of Electrical and Computer Engineering process will begin on October 1, 2011. Applicants are asked to send their application materials

  20. 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)

  1. 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.

  2. HOLOGRAPHY AND INTERFERENCE PROCESSING OF INFORMATION

    Microsoft Academic Search

    L M Soroko

    1967-01-01

    Introduction 643 I. Fresnel-transform Holography 644 1. Formulation of Problem (644). 2. The Holography Scheme (645). 3. Read and Virtual Images (646). 4. Bleached Hologram (647). 5. Dynamic Range of Hologram (647). Holographic Microscope (647). 7. Hologram in a Thick Emulsion (648). 8. Color Holography (648). II. Interference Processing of Information 649 1. Spatial Filtering of the Structure of an

  3. HELIOSEISMIC HOLOGRAPHY OF ACTIVE-REGION SUBPHOTOSPHERES

    E-print Network

    Braun, Douglas C.

    HELIOSEISMIC HOLOGRAPHY OF ACTIVE-REGION SUBPHOTOSPHERES (Invited Review) D. C. BRAUN, and C acoustic holography has opened a major new diagnostic avenue in local helioseismology. It has revealed-region photospheres. Phase-sensitive seismic holography is now yielding high-resolution maps of sound travel

  4. Electron Holography of Nanoparticles Aard Keimpema

    E-print Network

    Electron Holography of Nanoparticles Aard Keimpema 2008 #12;The work described in this thesis-90-367-3532-2 Copyright © 2008, K. Keimpema #12;RIJKSUNIVERSITEIT GRONINGEN Electron holography of nanoparticles Prof.dr. P. Rudolf #12;Contents 1 Introduction 1 1.1 History of electron holography

  5. 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.

  6. Digitized holography: spatial 3D imaging of virtual and real objects

    NASA Astrophysics Data System (ADS)

    Matsushima, Kyoji; Arima, Yasuaki; Nakahara, Sumio

    2011-06-01

    Recent development of computer algorithms and micro fabrication technologies allows us to reconstruct the wave-field of light emitted from a completely virtual 3D scene given by the numerical model. In addition, recent evolution of image sensors and a technique for capturing real object waves makes it possible to digitize the whole process of classical holography. The wave-field of the virtual, real, and hybrid scene are optically reconstructed by the computer holograms fabricated by laser lithography system. The produced spatial 3D images have a wide viewing-zone in full-parallax and give viewers a strong sensation of depth, which never has been caused by conventional 3D systems.

  7. Evolutionary computation technologies for space systems

    Microsoft Academic Search

    Richard J. Terrile; Christoph Adami; Hrand Aghazarian; Savio N. Chau; V. T. Dang; Michael I. Ferguson; Wolfgang Fink; Terrance L. Huntsberger; Gerhard Klimeck; Mark A. Kordon; Seungwon Lee; Paul von Allmen; Joseph Xu

    2005-01-01

    The Evolvable Computation Group, at NASA's Jet Propulsion Laboratory, is tasked with demonstrating the utility of computational engineering and computer optimized design for complex space systems. The group is comprised of researchers over a broad range of disciplines including biology, genetics, robotics, physics, computer science and system design, and employs biologically inspired evolutionary computational techniques to design and optimize complex

  8. Cognitive Effects With and Of Computer Technology

    Microsoft Academic Search

    GAVRIEL SALOMON

    1990-01-01

    A distinction is offered between cognitive effects with computers, whereby one's performance is redefined and upgraded during intellectual partnership with the computer, and effects of computers, whereby such partnership leaves durable and generalizable cognitive residues later on. Concerning effects with computers, it is argued that the quality of effects with computer programs greatly depends on the setting in which the

  9. Computer-aided design and computer science technology

    NASA Technical Reports Server (NTRS)

    Fulton, R. E.; Voigt, S. J.

    1976-01-01

    A description is presented of computer-aided design requirements and the resulting computer science advances needed to support aerospace design. The aerospace design environment is examined, taking into account problems of data handling and aspects of computer hardware and software. The interactive terminal is normally the primary interface between the computer system and the engineering designer. Attention is given to user aids, interactive design, interactive computations, the characteristics of design information, data management requirements, hardware advancements, and computer science developments.

  10. 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

  11. 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

  12. Soft computing: the convergence of emerging reasoning technologies

    Microsoft Academic Search

    Piero P. Bonissone

    1997-01-01

    The term Soft Computing (SC) represents the combination of emerging problem-solving technologies such as Fuzzy Logic (FL), Probabilistic Reasoning (PR), Neural Networks (NNs), and Genetic Algorithms (GAs). Each of these technologies provide us with complementary reasoning and searching methods to solve complex, real-world problems. After a brief description of each of these technologies, we will analyze some of their most

  13. Roadmap: Technical and Applied Studies -Computer Technology Applied Computer Security and Forensics Technology -Bachelor of Technical and Applied Studies

    E-print Network

    Khan, Javed I.

    Roadmap: Technical and Applied Studies - Computer Technology Applied Computer Security and Forensics Technology - Bachelor of Technical and Applied Studies RE-BTAS-TAS-CTAC Regional College Catalog: First Year Experience 1 1 Kent Core Requirement 3 Kent Core Requirement 3 Applied Courses 2 3 Semester

  14. COMPUTER VIRUS EDUCATIONAL SYSTEM USING ANIMATED PEDAGOGICAL AGENT TECHNOLOGY

    Microsoft Academic Search

    Zasriati Azla Sabot; Abdul Razak; Iznora Aini Zolkifly; Tan Teik Lew

    This paper describes a framework for practical application of interface agent technology as means of solving some persistent problems in educational environments. The system has been developed is called a Computer Virus Educational System Using Animated Pedagogical Agent or CAPA. CAPA will cover range of subjects from learning the basics computer virus to handling and management of computer system in

  15. 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…

  16. Analysis of Virtualization Technologies for High Performance Computing Environments

    E-print Network

    1 Analysis of Virtualization Technologies for High Performance Computing Environments Andrew J on the applicability to High Performance Computing environments using FutureGrid resources. The results indicate and computation to a remote location with some varying impact on system performance [2]. This provides a number

  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 of the Electrical and Computer Engineering (ECE) Department (www.ece.iit.edu). IIT is a private research university of power engineering, image and signal processing, communications engineering, computer engineering

  18. Roadmap: Technical and Applied Studies Computer Technology Networking

    E-print Network

    Sheridan, Scott

    Survey of Information Security, Internet Fraud and Computer Forensics 3 C May fulfill writingRoadmap: Technical and Applied Studies ­ Computer Technology Networking ­ Bachelor of Technical 11000 Introduction to Computer Systems (3) or COMT 12000 Personal Productivity Software (3) or MIS 24053

  19. Roadmap: Technical and Applied Studies Computer Technology Application Development

    E-print Network

    Sheridan, Scott

    Survey of Information Security, Internet Fraud and Computer Forensics 3 C May fulfill writingRoadmap: Technical and Applied Studies ­ Computer Technology Application Development ­ Bachelor Major GPA Important Notes Semester One: [16 Credit Hours] COMT 11000 Introduction to Computer Systems (3

  20. 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.

  1. Cognitive Effects with and of Computer Technology.

    ERIC Educational Resources Information Center

    Salomon, Gavriel

    1990-01-01

    Discusses the distinction between cognitive effects with computers, whereby an individual's performance is redefined and upgraded during intellectual partnership with the computer, and effects of computers, whereby such partnership leaves durable and generalizable cognitive residues. Suggests two mechanisms for affecting cognition: skill…

  2. 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.

  3. 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

  4. Microscopy based on digital lensless Fourier transforms holography

    Microsoft Academic Search

    Zhaoji Chen; Feifei Liu; Wendi Gong; Huaying Wang

    2010-01-01

    With the recent technological advances, there is an increasing need for testing the microstructure of objects. We show here Digital Holographic Microscopy (DHM) that implements digitally the principle of holography. It is particularly well suited for recording and reconstructing three-dimensional objects. In this paper, we present an off-axis digital holographic configuration and address some basic issues of the off-axis lensless

  5. 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

  6. Evolving technologies for Space Station Freedom computer-based workstations

    NASA Technical Reports Server (NTRS)

    Jensen, Dean G.; Rudisill, Marianne

    1990-01-01

    Viewgraphs on evolving technologies for Space Station Freedom computer-based workstations are presented. The human-computer computer software environment modules are described. The following topics are addressed: command and control workstation concept; cupola workstation concept; Japanese experiment module RMS workstation concept; remote devices controlled from workstations; orbital maneuvering vehicle free flyer; remote manipulator system; Japanese experiment module exposed facility; Japanese experiment module small fine arm; flight telerobotic servicer; human-computer interaction; and workstation/robotics related activities.

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

    Microsoft Academic Search

    Francesco Caselli; John Coleman

    2001-01-01

    Abstract We use data on imports of computer equipment for a large sample of countries between 1970 and 1990 to investigate the determinants of computer-technology adoption. We Þnd 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 Þnd evidence that computer adoption is enhanced by high investment

  8. Computational Biologist 10X Technologies is a Silicon Valley start-up developing new technologies for breakthrough next

    E-print Network

    Borenstein, Elhanan

    Computational Biologist 10X Technologies is a Silicon Valley start-up developing new technologies for breakthrough next generation sequencing applications. The core technology combines advances in chemistry, biochemistry, microfluidics and computational biology. 10X is looking

  9. Phase-multiplication holography

    SciTech Connect

    Collins, H.D.; Prince, J.M.; Davis, T.J.

    1982-01-25

    This disclosure relates generally to nondestructive testing for identifying structural characteristics of an object by scanned holographic techniques using a known source of radiation, such as electromagnetic or acoustical radiation. It is an object of this invention to provide an apparatus and method for synthetic aperture expansion in holographic imaging applications to construct fringe patterns capable of holographic reproduction where aperture restrictions in nondestructive testing applications would conventionally make such imaging techniques impossible. The apparatus and method result in the production of a sharply defined frontal image of structural characteristics which could not otherwise be imaged because they occur either near the surface of the object or are confined by geometry restricting aperture dimensions available for scanning purposes. The depth of the structural characteristic below the surface of the object can also be determined by the reconstruction parameters which produce the sharpest focus. Lateral resolution is established by simulated reduction in the radiation wavelength and may easily be an order of magnitude less than the electromagnetic wavelength in the material or 2 times the standard depth of penetration. Since the phase multiplication technique is performed on the detected data, the penetration depth available due to the longer wavelength signals applied to the test object remains unchanged. The phase multiplication technique can also be applied to low frequency acoustic holography, resulting in a test which combines excellent penetration of difficult materials with high resolution images.

  10. Temporally modulated holography.

    PubMed

    Aleksoff, C C

    1971-06-01

    It is shown that temporal modulation of the object and/or reference wave in holographic interferometry can advantageously control fringe characteristics. The work presented is based on the concept that the hologram recording process acts as a filter applied to the cross correlation between the conjugate of the reference wave spectrum with the object wave spectrum. The filter is determined by the shuttering of the hologram. Specific types of modulation are considered both experimentally and theoretically. With single-sideband suppressed-carrier modulation of either the reference wave or object wave the hologram process can act as a heterodyne detection system for small-amplitude vibrations or as a system with a controllable number of fringes for large-amplitude vibrations. Certain types of modulation, such as sinusoidal phase modulation of the reference wave, are shown to give the relative phases of the object vibrations. Consideration is given to synthesizing general fringe patterns in multiple exposure holograms. Generalized strobe holography is also analyzed. PMID:20111115

  11. When Is Holography Consistent?

    E-print Network

    McInnes, Brett

    2015-01-01

    Holographic duality relates two radically different kinds of theory: one with gravity, one without. The very existence of such an equivalence imposes strong consistency conditions which are, in the nature of the case, hard to satisfy. Recently a particularly deep condition of this kind, relating the minimum of a probe brane action to a gravitational bulk action (in a Euclidean formulation), has been recognised; and the question arises as to the circumstances under which it, and its Lorentzian counterpart, are satisfied. We discuss the fact that there are physically interesting situations in which one or both versions might, in principle, \\emph{not} be satisfied. These arise in two distinct circumstances: first, when the bulk is not an Einstein manifold, and, second, in the presence of angular momentum. Focusing on the application of holography to the quark-gluon plasma (of the various forms arising in the early Universe and in heavy-ion collisions), we find that these potential violations never actually occur...

  12. 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...

  13. 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...

  14. 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...

  15. 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 [RE-AAB-COMT-IMMT] Regional College Catalog Year: 2012-2013 Page 1 of 1 | Last Updated: 15-Mar-12/LNHD or COMT 11004 Survey of Information Technology or COMT 21007 Internet Ethics and Policies 3 MATH 11009

  16. Olivier Dufour Computer technologies to better understanding ecosystem

    E-print Network

    Chamroukhi, Faicel

    Olivier Dufour Computer technologies to better understanding ecosystem birth date: 06://sis.univ-tln.fr/~glotin/dufour/olivierlouis.dufour.html Keywords : Ecology, Ecosystem functioning, ecological restoration, modeling, Statistic, Programing

  17. 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)

  18. Molecular and Nanoscale Computing and Technology

    Microsoft Academic Search

    Mary M. Eshaghian-Wilner; Amar H. Flood; Alex Khitun; J. Fraser Stoddart; Kang Wang

    In this chapter, we have presented an overview of various nanoscale and molecular computing architectures. We have given a brief tutorial on various existing nanoscale and molecular devices. These include molecular switches, resonant tunnel diodes, tunnel diodes, single electron transistors, carbon nanotube field-effect transistors, quantum dots, and spin systems. We have next discussed a set of nanoscale computing modules, such

  19. Latvian way to display holography

    Microsoft Academic Search

    Janis Harja

    1998-01-01

    Display holography in Latvia goes back to two different sources. First, amorphous films of chalcogenide semiconductors yielding a surface microrelief after exposure and development have been investigated at the Institute of Physics at the Latvian Academy of Sciences in the late 1970's up to now. Second, techniques for making laser- and white-light holograms of various types have been developed at

  20. Holography of smooth metallic objects

    Microsoft Academic Search

    V. N. Vasilev; L. V. Strygin

    1976-01-01

    Photographs are presented of images reconstructed from holograms of smooth metallic objects shaped like cones, cylinders, and truncated cones. The recording of the scattered field was performed by lensless Fourier holography in the far field of diffraction. In the course of reconstruction, the hologram was placed alongside the lens, and the image was photographed in the lens focal plane. The

  1. Resolution analysis of digital holography

    Microsoft Academic Search

    Qi Fan; Jianlin Zhao

    2006-01-01

    The resolutions of the Charge Coupled Device (CCD), the reconstructed image, and the reconstructed image plane in digital holography are theoretically and experimentally analyzed in this paper. Three important conclusions are achieved: (1) By studying the resolution requirements of CCD in different digital holographic recording setups, it shows that lensless Fourier transform holographic recording setup can relax the requirement of

  2. Display Holography's Digital Second Act

    Microsoft Academic Search

    V. Michael Bove

    2012-01-01

    Holography, with its stunning 3-D realism and its expressive potential, in the 1970s and 1980s seemed poised to become the next step in the evolution of visual display. Yet apart from certain specialized niches, display holograms are perhaps more rarely encountered in everyday life than they were 20 or 30 years ago. But the recent resurgence of interest in 3-D

  3. Holography applications in recent China

    NASA Astrophysics Data System (ADS)

    Hsu, Dahsiung

    2000-10-01

    Reports on recent developments on holography applications in China are given in this paper, including the development of anti-counterfeiting Holograms from 1986-2000, China issued Banknotes in 1999 with holograms and OVIs, the developments in Machine Readable Holograms in China, the developments in Anti-counterfeiting Information Networks in China.

  4. Computer technologies: Attitudes and self-efficacy across undergraduate disciplines

    Microsoft Academic Search

    Mable B. Kinzie; Marcia A. B. Delcourt; Susan M. Powers

    1994-01-01

    Computer technologies are important tools for learning, communicating, and retrieving information. For individuals to effectively\\u000a employ these tools, they must feel self-efficacious in using them. For this reason it is important to examine attitudes and\\u000a perceptions of competence that are encouraged by undergraduate educational programs. This paper reports on the factor validation\\u000a of two affective measures related to computer technologies,

  5. October 22, 2014 Information Technology & Computing Services

    E-print Network

    & Desktop Technology Support · Encase forensics: partnering with Internal Audit to deploy forensics client' system (chemical based suppression). The clean agent suppression will not damage I.T. hardware upon

  6. 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 14-01 January 2014 Robust and efficient uncertainty quantification and validation of RFIC isolation by A. Di of Technology P.O. Box 513 5600 MB Eindhoven, The Netherlands ISSN: 0926-4507 #12;#12;Robust and Efficient

  7. 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.

  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. Roadmap: Business Management Technology Computer Applications -Associate of Applied Business

    E-print Network

    Sheridan, Scott

    Roadmap: Business Management Technology ­ Computer Applications - Associate of Applied Business [RE] ACTT 11000 Accounting I-Financial 4 BMRT 11000 Introduction to Business 3 COMT 11000 Introduction: [18 Credit Hours] BMRT 21008 Case Studies in Management Technology 3 BMRT 21011 Fundamentals

  10. Reaching Distance Students with Computer Network Technology (Part III).

    ERIC Educational Resources Information Center

    Eastmond, Daniel; Granger, Daniel

    1997-01-01

    This article is third in a series on the technology used in distance education courses at the Center for Distance Education at the State University of New York's Empire State College. Discusses student access to computer technology, describes various hardware and software environments at the college, and lists suggestions to improve student…

  11. Circuit technologies for BiCMOS VLSIs as computer elements

    Microsoft Academic Search

    H. Maejima; T. Bandoh; Y. Nishio; T. Fukushima; M. Odaka; A. Hotta

    1989-01-01

    System requirements for VLSI technologies are reviewed and circuit technologies for BiCMOS VLSIs as computer elements are described. The following topics are dealt with: circuits for logic gates-conventional circuits and feedback type circuits for finer process; circuits for macrocells-CMOS logic circuits with bipolar sense circuits; and circuits for application-specific memories-sense amplifiers with comparators

  12. 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…

  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. 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…

  15. Pen computing: a technology overview and a vision

    Microsoft Academic Search

    André Meyer

    1995-01-01

    This work gives an overview of a new technology that is attracting growing interest in public as well as in the computer industry itself. The visible difference from other technologies is in the use of a pen or pencil as the primary means of interaction between a user and a machine, picking up the familiar pen and paper interface metaphor.

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

    Microsoft Academic Search

    Ying-chen L. Milbrath; Mable B. Kinzie

    2000-01-01

    To be effective users of computer technologies and be mod-els for students' computer use, teachers must have positive computer attitudes and feel self-efficacious in using them. The computer training that teachers receive through their teacher education program is likely to foster positive com-puter affect, yet the change may require time and develop-ment. This longitudinal study examined prospective teach-ers' changes in

  17. Computing and Information Technology Introduction to UNIX

    E-print Network

    Dudek, Gregory

    is a powerful computer operating system originally developed by AT&T Bell Laboratories. Over the years, two's Solaris OS 5.6, which is an implementation of System V. Even through the variant of UNIX available at UB

  18. 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)

  19. Computers and terminals as an aid to international technology transfer

    NASA Technical Reports Server (NTRS)

    Sweeney, W. T.

    1974-01-01

    As technology transfer becomes more popular and proves to be an economical method for companies of all sizes to take advantage of a tremendous amount of new and available technology from sources all over the world, the introduction of computers and terminals into the international technology transfer process is proving to be a successful method for companies to take part in this beneficial approach to new business opportunities.

  20. 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

  1. 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…

  2. IPv6 MANET: An Essential Technology for Future Pervasive Computing

    Microsoft Academic Search

    J. Gnana Jayanthi; S. Albert Rabara; A. R. Macedo Arokiaraj

    2010-01-01

    In the near future, a pervasive computing environment can be expected to be based on the recent progresses and advances in computing and communication technologies. The Next generation (Next-Gen) of mobile communications will include both prestigious infrastructured wireless networks and novel infrastructureless Mobile Adhoc NETworks (MANETs). The special features of MANET bring great opportunities together with severe challenges. With this

  3. School of Computer Science and Information Technology University of Nottingham

    E-print Network

    McCollum, Barry

    ://www.yandy.com #12;A Survey of Search Methodologies and Automated Approaches for Examination Timetabling R. Qu1 , ESchool of Computer Science and Information Technology University of Nottingham Jubilee Campus NOTTINGHAM NG8 1BB, UK Computer Science Technical Report No. NOTTCS-TR-2006-4 A Survey of Search

  4. 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…

  5. The Intel Science and Technology Center for Cloud Computing

    E-print Network

    Economics, Principled Technology, expert interviews, Bain analysis. Huge potential benefits Innovation, and productivity improvements in cloud computing. White Paper Intel Labs ISTC for Cloud Computing #12;The Intel using online storage when sharing videos or photos, engaging in social networks, and using online

  6. Speckled computing: disruptive technology for networked information appliances

    Microsoft Academic Search

    D. K. Arvind; K. J. Wong

    2004-01-01

    Speckled Computing is an emerging technology in which data will be sensed in minute (ultimately around one cubic millimetre) semiconductor grains called Specks. Information will be extracted, exchanged and processed in a collaborative fashion in a wireless network of thousands of Specks, called a Specknet. The impact of Speckled Computing on consumer electronics, especially future information appliances, will be disruptive.

  7. Use of Computer Technology to Help Students with Special Needs

    Microsoft Academic Search

    Ted S. Hasselbring; Candyce H. Williams Glaser

    2000-01-01

    Millions of students across the United States cannot benefit fully from a traditional educational program because they have a disability that impairs their ability to partic- ipate in a typical classroom environment. For these students, computer-based tech- nologies can play an especially important role. Not only can computer technology facilitate a broader range of educational activities to meet a variety

  8. Illinois Institute of Technology Department of Electrical and Computer Engineering

    E-print Network

    Saniie, Jafar

    and contact information of at least three references. Application materials should be submitted electronicallyIllinois Institute of Technology Department of Electrical and Computer Engineering Department Chair of the Electrical and Computer Engineering (ECE) Department (www.ece.iit.edu). IIT is a private research university

  9. Future technologies from trends in computer forensic science

    Microsoft Academic Search

    V. Civie; R. Civie

    1998-01-01

    The origins of computer forensic science are examined and correlated to the evolution of forensic technologies and future research and development. Techniques to recover information from attempts to destroy files or inflict physical damage to the computer are illustrated. Included is a discussion on the specialized environments, tools and techniques required to recover information from physically damaged disks. Magnetic techniques

  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. Magnetic imaging by x-ray holography using extended references

    NASA Astrophysics Data System (ADS)

    Duckworth, Thomas A.; Ogrin, Feodor; Dhesi, Sarnjeet S.; Langridge, Sean; Whiteside, Amy; Moore, Thomas; Beutier, Guillaume; van der Laan, Gerrit

    2011-08-01

    We demonstrate magnetic lensless imaging by Fourier transform holography using extended references. A narrow slit milled through an opaque gold mask is used as a holographic reference and magnetic contrast is obtained by x-ray magnetic circular dichroism. We present images of magnetic domains in a Co/Pt multilayer thin film with perpendicular magnetic anisotropy. This technique holds advantages over standard Fourier transform holography, where small holes are used to define the reference beam. An increased intensity through the extended reference reduces the counting time to record the farfield diffraction pattern. Additionally it was found that manufacturing narrow slits is less technologically demanding than the same procedure for holes. We achieve a spatial resolution of ˜30 nm, which was found to be limited by the sample period of the chosen experimental setup.

  12. Magnetic imaging by x-ray holography using extended references.

    PubMed

    Duckworth, Thomas A; Ogrin, Feodor; Dhesi, Sarnjeet S; Langridge, Sean; Whiteside, Amy; Moore, Thomas; Beutier, Guillaume; van der Laan, Gerrit

    2011-08-15

    We demonstrate magnetic lensless imaging by Fourier transform holography using extended references. A narrow slit milled through an opaque gold mask is used as a holographic reference and magnetic contrast is obtained by x-ray magnetic circular dichroism. We present images of magnetic domains in a Co/Pt multilayer thin film with perpendicular magnetic anisotropy. This technique holds advantages over standard Fourier transform holography, where small holes are used to define the reference beam. An increased intensity through the extended reference reduces the counting time to record the farfield diffraction pattern. Additionally it was found that manufacturing narrow slits is less technologically demanding than the same procedure for holes. We achieve a spatial resolution of ?30 nm, which was found to be limited by the sample period of the chosen experimental setup. PMID:21934984

  13. Tailoring ultrasonic beams with optoacoustic holography

    NASA Astrophysics Data System (ADS)

    Meyer, Alex; Gspan, Stefan J.; Bernet, Stefan; Ritsch-Marte, Monika

    2003-06-01

    A combination of laser-induced ultrasound generation and ultrasonic holography for spatial control of the generated ultrasonic pulse is presented. Ultrasound is produced by absorption of laser pulses at an absorbing layer in a water tank via the optoacoustic effect. In order to produce a defined ultrasonic frequency in the MHz range, the laser pulses are harmonically time-modulated using an acousto-optic modulator (AOM). Additionally, the laser intensity is spatially controlled. This is realized with a high resolution liquid crystal spatial light modulator (LCD). A computer generated pattern is displayed at the LCD and projected by the expanded laser beam to an absorptive layer in the water tank. As a result, the emitted ultrasonic wave emerges in a predetermined way, which is an acoustical analogue to the effect of a "diffractive optical element" in laser optics. The flexible method of optical ultrasound generation and diffractive steering promises new applications in medical and technical ultrasound diagnostics.

  14. Holography of 3D flat cosmological horizons.

    PubMed

    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 AdS(3)/CFT(2) 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. PMID:25166977

  15. The world's technological capacity to store, communicate, and compute information.

    PubMed

    Hilbert, Martin; López, Priscila

    2011-04-01

    We estimated the world's technological capacity to store, communicate, and compute information, tracking 60 analog and digital technologies during the period from 1986 to 2007. In 2007, humankind was able to store 2.9 × 10(20) optimally compressed bytes, communicate almost 2 × 10(21) bytes, and carry out 6.4 × 10(18) instructions per second on general-purpose computers. General-purpose computing capacity grew at an annual rate of 58%. The world's capacity for bidirectional telecommunication grew at 28% per year, closely followed by the increase in globally stored information (23%). Humankind's capacity for unidirectional information diffusion through broadcasting channels has experienced comparatively modest annual growth (6%). Telecommunication has been dominated by digital technologies since 1990 (99.9% in digital format in 2007), and the majority of our technological memory has been in digital format since the early 2000s (94% digital in 2007). PMID:21310967

  16. Computer Science and Computer Information Technology majors together: Analyzing factors impacting students' success in introductory programming

    Microsoft Academic Search

    Maureen Doyle; D. Kasturiratna; B. D. Richardson; S. W. Soled

    2009-01-01

    In 2004 Northern Kentucky University began offering a Bachelor of Science degree in Computer Information Technology. As these new majors began to enroll alongside Computer Science majors in the required and standard Computer Science 1 (CS 1) course, the context of CS 1 shifted. Accordingly, we made curriculum changes to adapt the introductory programming sequence to this new context. These

  17. Office of Information Technology Newark Computing Services

    E-print Network

    Hanson, Stephen José

    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/system-requirements To review the steps necessary to upgrade from Windows XP to Windows 8.1, please visit

  18. EXPERIMENTAL MODELS FOR VALIDATING COMPUTER TECHNOLOGY

    Microsoft Academic Search

    Marvin V. Zelkowitz; Dolores Wallace

    1998-01-01

    Experimentation is important within science for determining the effectiveness of proposed theories and methods. However, computer science has not developed a concise taxonomy of methods applicable for demonstrating the validity of a new technique. In this paper we discuss the methods generally employed to validate an experiment and propose a taxonomy consisting of 12 techniques that can be used to

  19. Technological Imperatives: Using Computers in Academic Debate.

    ERIC Educational Resources Information Center

    Ticku, Ravinder; Phelps, Greg

    Intended for forensic educators and debate teams, this document details how one university debate team, at the University of Iowa, makes use of computer resources on campus to facilitate storage and retrieval of information useful to debaters. The introduction notes the problem of storing and retrieving the amount of information required by debate…

  20. Surpassing digital holography limits by lensless object scanning holography.

    PubMed

    Micó, Vicente; Ferreira, Carlos; García, Javier

    2012-04-23

    We present lensless object scanning holography (LOSH) as a fully lensless method, capable of improving image quality in reflective digital Fourier holography, by means of an extremely simplified experimental setup. LOSH is based on the recording and digital post-processing of a set of digital lensless holograms and results in a synthetic image with improved resolution, field of view (FOV), signal-to-noise ratio (SNR), and depth of field (DOF). The superresolution (SR) effect arises from the generation of a synthetic aperture (SA) based on the linear movement of the inspected object. The same scanning principle enlarges the object FOV. SNR enhancement is achieved by speckle suppression and coherent artifacts averaging due to the coherent addition of the multiple partially overlapping bandpass images. And DOF extension is performed by digital refocusing to different object's sections. Experimental results showing an impressive image quality improvement are reported for a one-dimensional reflective resolution test target. PMID:22535027

  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. Energy and Technology Review

    NASA Astrophysics Data System (ADS)

    Poggio, Andrew J.

    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.

  3. The change in critical technologies for computational physics

    NASA Technical Reports Server (NTRS)

    Watson, Val

    1990-01-01

    It is noted that the types of technology required for computational physics are changing as the field matures. Emphasis has shifted from computer technology to algorithm technology and, finally, to visual analysis technology as areas of critical research for this field. High-performance graphical workstations tied to a supercommunicator with high-speed communications along with the development of especially tailored visualization software has enabled analysis of highly complex fluid-dynamics simulations. Particular reference is made here to the development of visual analysis tools at NASA's Numerical Aerodynamics Simulation Facility. The next technology which this field requires is one that would eliminate visual clutter by extracting key features of simulations of physics and technology in order to create displays that clearly portray these key features. Research in the tuning of visual displays to human cognitive abilities is proposed. The immediate transfer of technology to all levels of computers, specifically the inclusion of visualization primitives in basic software developments for all work stations and PCs, is recommended.

  4. 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.

  5. Surface roughness measurement by digital holography

    Microsoft Academic Search

    Yan Li; Dayong Wang; Jie Zhao; Guangjun Wang; Yunxin Wang

    2010-01-01

    Surface roughness is crucial guideline to the surface quantity of work piece. This paper demonstrates a simple approach for measurement of surface roughness by using digital holography imaging method based on reflection off-axis lensless Fourier transform (LFT) holography. The surface profiles of the standard roughness sample plates which have the different arithmetic average height values are used as the measurement

  6. Progress in industrial holography in France

    NASA Astrophysics Data System (ADS)

    Smigielski, Paul

    1992-01-01

    Industrial applications of holography in France are briefly reviewed. Particular attention is given to nondestructive testing of helicopter blades at Aerospatiale Central Laboratory, the use of holography at Renault for car-engine vibration study, vibration characterization of turbo-jet engine components at SNECMA, and vibration analysis of plates in an industrial hemodynamic tunnel.

  7. 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.

  8. Space systems computer-aided design technology

    NASA Technical Reports Server (NTRS)

    Garrett, L. B.

    1984-01-01

    The interactive Design and Evaluation of Advanced Spacecraft (IDEAS) system is described, together with planned capability increases in the IDEAS system. The system's disciplines consist of interactive graphics and interactive computing. A single user at an interactive terminal can create, design, analyze, and conduct parametric studies of earth-orbiting satellites, which represents a timely and cost-effective method during the conceptual design phase where various missions and spacecraft options require evaluation. Spacecraft concepts evaluated include microwave radiometer satellites, communication satellite systems, solar-powered lasers, power platforms, and orbiting space stations.

  9. 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.

  10. 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.

  11. 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.

  12. Time-averaged digital holography.

    PubMed

    Picart, Pascal; Leval, Julien; Mounier, Denis; Gougeon, Samuel

    2003-10-15

    We demonstrate that it is possible to study the modal structures of a vibrating object with digitally recorded holograms by use of the time-averaging principle. We investigate the numerical reconstruction from a theoretical point of view, and we show that the numerically reconstructed object from a digital hologram is modulated by the zeroth-order Bessel function. Results of experiments in time-averaged digital holography are presented. PMID:14587769

  13. Understanding and enhancing user acceptance of computer technology

    NASA Technical Reports Server (NTRS)

    Rouse, William B.; Morris, Nancy M.

    1986-01-01

    Technology-driven efforts to implement computer technology often encounter problems due to lack of acceptance or begrudging acceptance of the personnel involved. It is argued that individuals' acceptance of automation, in terms of either computerization or computer aiding, is heavily influenced by their perceptions of the impact of the automation on their discretion in performing their jobs. It is suggested that desired levels of discretion reflect needs to feel in control and achieve self-satisfaction in task performance, as well as perceptions of inadequacies of computer technology. Discussion of these factors leads to a structured set of considerations for performing front-end analysis, deciding what to automate, and implementing the resulting changes.

  14. Holography: childrens' window to relativity

    NASA Astrophysics Data System (ADS)

    MacShane, James E.

    1995-02-01

    This paper is concerned with the development of the concept of natural education. Psychology has discovered that all humans learn intuitively the cultural concepts of time from birth to eight and one-half to ten years of age. Einstein showed us that this must also be the natural time for the development of spatial concepts. The importance of this has been dramatized for me in the past eight years that I have been developing the Laser Arts and Holography Programs and Workshops. I have worked with over 100,000 students kindergarten through eighth grade. I have worked with 175 students age 8 to 10 in three hour and one half workshops specifically on the development of time and space concepts. The concepts developed are based upon the vast amount of psychological evidence related to the natural development of time and space understandings, Dr. Nils Abramson's 'Light in Flight' and subsequent work on the clarification of relativity through holography, and Maria Montessori's method of Scientific Education. The paper also demonstrates the natural method of teaching science to younger students is to teach scientifically. All of the research which has been done in the past 100 years has been used by the educational institutions to try to improve the system. What has not been done is changing the system to how humans learn. Because of the perceived hi-tech nature of the program I am able to dramatize the potential. An outline for a holography curriculum kindergarten through eighth grade is included.

  15. INTEGRATION OF COMPUTER TECHNOLOGIES INTO AN ENGLISH LANGUAGE LEARNING CLASSROOM

    Microsoft Academic Search

    Yen-Hui WANG; Hsiang-Yun TSAO; Gaung-Cheng CHEN

    2013-01-01

    The present study integrated computer technologies into regular English classes to examine whether using the online TOEIC simulated-test system could promote the TOEIC listening and reading test performance of a group of Taiwanese EFL learners. The participants involved in the one-academic-year study were 52 second-year Taiwanese technological college students who were required to attend classroom instruction sessions about TOEIC test

  16. 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.

  17. Non-invasive monitoring for living cell culture with lensless Fourier transform digital holography microscopy

    Microsoft Academic Search

    Yunxin Wang; Dayong Wang; Jie Zhao; Yan Li; Puhui Meng; Yuhong Wan; Zhuqing Jiang

    2010-01-01

    The number of cells is commonly employed to describe the cell viability and the status of cell culture in a certain extent. An automatic and non-invasive detecting method for the status analysis of cell culture is developed based on digital holography microscopy (DHM) technology. Digital holographic imaging can retrieve quantitative information of object wavefront by the numerical reconstruction from a

  18. Engineering Technology Programs Courses Guide for Computer Aided Design and Computer Aided Manufacturing.

    ERIC Educational Resources Information Center

    Georgia Univ., Athens. Div. of Vocational Education.

    This guide describes the requirements for courses in computer-aided design and computer-aided manufacturing (CAD/CAM) that are part of engineering technology programs conducted in vocational-technical schools in Georgia. The guide is organized in five sections. The first section provides a rationale for occupations in design and in production,…

  19. 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

  20. First Year Preservice Teachers' Attitudes toward Computers from Computer Education and Instructional Technology Department

    ERIC Educational Resources Information Center

    Yakin, Ilker, Sumuer, Evren

    2007-01-01

    The purpose of the study is to explore the attitudes of first year university students towards computers. The study focuses on preservice teachers (N=46) included 33 male and 12 female from Middle East Technical University, Computer Education and Instructional Technology (CEIT) department. The study is delimited to first grade preservice teachers…

  1. 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.

  2. Super-Resolved Digital Holography Based on the Coherent Diffraction Imaging Scheme

    NASA Astrophysics Data System (ADS)

    Wang, Bao-Sheng; Pan, Xing-Chen; Wang, Hai-Yan; Cheng, Jun; Gao, Shu-Mei; Liu, Cheng; Zhu, Jian-Qiang

    2013-05-01

    An algorithm is proposed to enhance the resolution of digital holography by retrieving the frequency components lost in common holograms. A pinhole is placed directly behind the specimen to record the hologram, and an iterative scheme commonly used in coherent diffraction imaging is adopted for the reconstruction. Since some of the frequency components lost in common digital holography can be properly retrieved, the resolution of the reconstructed image is remarkably improved. Theoretical analysis and computer simulations are presented to demonstrate the feasibility of this proposed technique.

  3. 2012 Question Booklet Code CS : COMPUTER SCIENCE & INFORMATION TECHNOLOGY

    E-print Network

    Krishnapura, Nagendra

    2012 Question Booklet Code CS-A 1/20 CS : COMPUTER SCIENCE & INFORMATION TECHNOLOGY Duration: Three of the Question Booklet until you are asked to do so by the invigilator. 2. Take out the Optical Response Sheet (ORS) from this Question Booklet without breaking the seal and read the instructions printed on the ORS

  4. 2013 Question Booklet Code CS : COMPUTER SCIENCE AND INFORMATION TECHNOLOGY

    E-print Network

    Krishnapura, Nagendra

    2013 Question Booklet Code CS-A 1/20 CS : COMPUTER SCIENCE AND INFORMATION TECHNOLOGY Duration of the Question Booklet until you are asked to do so by the invigilator. 2. Take out the Optical Response Sheet (ORS) from this Question Booklet without breaking the seal and read the instructions printed on the ORS

  5. Spatial Visualization--A Gateway to Computer-Based Technology.

    ERIC Educational Resources Information Center

    Norman, Kent L.

    1994-01-01

    A model is proposed for the influence of individual differences on performance when computer-based technology is introduced. The primary cognitive factor driving differences in performance is spatial visualization ability. Four techniques for mitigating the negative impact of low spatial visualization are discussed: spatial metaphors, graphical…

  6. Computer and information technology in the year 2000 - a projection

    Microsoft Academic Search

    S. F. Lundstrom; R. L. Larsen

    1985-01-01

    The reasoning and conclusions drawn by a panel of experts from the National Research Council who, at the request of NASA, considered information and computer technologies which would be available in the year 2000 are reported. The deliberations covered microelectronics and components, processors, software, AI and expert systems, man-machine interfaces, systems development and implementation and high-integrity systems. It was projected

  7. Technological Barriers to Successful eLearning in Computer Science

    Microsoft Academic Search

    Yuwanuch Gulatee; Barbara Combes

    2007-01-01

    In an attempt to provide educational opportunities for students who are working or who are located at a distance, many universities and schools have developed wholly online distance education programs. These online courses use web technology as a distributed learning mechanism. However, online distance learning in Computer Science courses remains challenging for both teachers and students. Research has shown that

  8. 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

  9. 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

  10. 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.

  11. Massachusetts Institute of Technology Department of Electrical Engineering & Computer Science

    E-print Network

    Peraire, Jaime

    Massachusetts Institute of Technology Department of Electrical Engineering & Computer Science 6 such that A B. Can A and B be independent? 2. An electrical system consists of identical components that are operational with probability p independently of other components. The components are connected in three

  12. Computer Technology Integration and Student Learning: Barriers and Promise

    ERIC Educational Resources Information Center

    Keengwe, Jared; Onchwari, Grace; Wachira, Patrick

    2008-01-01

    Political and institutional support has enabled many institutions of learning to spend millions of dollars to acquire educational computing tools (Ficklen and Muscara, "Am Educ" 25(3):22-29, 2001) that have not been effectively integrated into the curriculum. While access to educational technology tools has remarkably improved in most schools,…

  13. Computer integrated manufacturing and technology transfer for improving aerospace productivity

    NASA Astrophysics Data System (ADS)

    Farrington, P. A.; Sica, J.

    1992-03-01

    This paper reviews a cooperative effort, between the Alabama Industial Development Training Institute and the University of Alabama in Huntsville, to implement a prototype computer integrated manufacturing system. The primary use of this system will be to educate Alabama companies on the organizational and technological issues involved in the implementation of advanced manufacturing systems.

  14. Hindawi Publishing Corporation International Journal of Computer Games Technology

    E-print Network

    Lewis, Kemper E.

    Hindawi Publishing Corporation International Journal of Computer Games Technology Volume 2009, Article ID 952524, 15 pages doi:10.1155/2009/952524 Research Article Experiential Learning in Vehicle Dynamics Education via Motion Simulation and Interactive Gaming Kevin Hulme,1 Edward Kasprzak,2 Ken English

  15. 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

  16. Roadmap: Technical and Applied Studies Computer Technology Application Development

    E-print Network

    Khan, Javed I.

    Roadmap: Technical and Applied Studies ­ Computer Technology Application Development ­ Bachelor of Technical and Applied Studies [RE-BTAS-TAS-CTAD] Regional College Catalog Year: 2013-2014 Page 1 of 3 | Last Kent Core Requirement 3 See Kent Core Summary on page 2 Applied Course 3 See note 1 on page 2 Semester

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

    Microsoft Academic Search

    G. B. Newby; D. Morton

    2008-01-01

    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

  18. 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…

  19. 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. ...

  20. Nearfield acoustic holography. I - Theory of generalized holography and the development of NAH

    NASA Technical Reports Server (NTRS)

    Maynard, J. D.; Williams, E. G.; Lee, Y.

    1985-01-01

    Because its underlying principles are so fundamental, holography has been studied and applied in many areas of science. Recently, a technique has been developed which takes the maximum advantage of the fundamental principles and extracts much more information from a hologram than is customarily associated with such a measurement. In this paper the fundamental principles of holography are reviewed, and a sound radiation measurement system, called nearfield acoustic holography (NAH), which fully exploits the fundamental principles, is described.

  1. Providing Assistive Technology Applications as a Service Through Cloud Computing.

    PubMed

    Mulfari, Davide; Celesti, Antonio; Villari, Massimo; Puliafito, Antonio

    2015-01-01

    Users with disabilities interact with Personal Computers (PCs) using Assistive Technology (AT) software solutions. Such applications run on a PC that a person with a disability commonly uses. However the configuration of AT applications is not trivial at all, especially whenever the user needs to work on a PC that does not allow him/her to rely on his / her AT tools (e.g., at work, at university, in an Internet point). In this paper, we discuss how cloud computing provides a valid technological solution to enhance such a scenario.With the emergence of cloud computing, many applications are executed on top of virtual machines (VMs). Virtualization allows us to achieve a software implementation of a real computer able to execute a standard operating system and any kind of application. In this paper we propose to build personalized VMs running AT programs and settings. By using the remote desktop technology, our solution enables users to control their customized virtual desktop environment by means of an HTML5-based web interface running on any computer equipped with a browser, whenever they are. PMID:26132225

  2. Document: P1335 Category: Computing Technologies, Utility Software License Status: Available for licensing Texas Industry Cluster: Information and Computer Technology

    E-print Network

    Lightsey, Glenn

    : Available for licensing Texas Industry Cluster: Information and Computer Technology Digital neuroevolution applications lack a method of evolving networks for learning tasks. In difficult real-world learning tasks such as controlling robots, playing games, or pursuing or evading an enemy, there are no direct targets that could

  3. 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.

  4. 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.

  5. Holography through optically active windows

    NASA Technical Reports Server (NTRS)

    Decker, A. J.

    1979-01-01

    By using two orthogonally polarized reference beams, holograms can be recorded through stressed windows and the reconstructed virtual image will show no stress pattern. As shown analytically, the stress-pattern-free hologram is recordable for any polarization state of the object illumination. Hence, the more efficient nondepolarizing diffuser can be used in performing holography through stressed windows if two reference beams are used. Results are presented for a pair of machined polysulfone windows intended for use in a holographic flow-visualization setup in a single-stage-compressor test rig.

  6. 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.

  7. 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

  8. 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

  9. Thermal Neutron Holography

    Microsoft Academic Search

    B. Sur; R. B. Rogge; V. N. P. Anghel; J. Katsaras

    X-ray and neutron diffraction techniques have for almost a century produced results that provide important insights into materials\\u000a of interest to a wide range of scientific and technological disciplines. However, traditional diffraction techniques have\\u000a their limits, and these limits are best exemplified by the fact that certain important materials (e.g., integral proteins)\\u000a are difficult if not impossible to crystallize —

  10. Genetic Algorithm Modeling with GPU Parallel Computing Technology

    E-print Network

    Cavuoti, Stefano; Brescia, Massimo; Pescapé, Antonio; Longo, Giuseppe; Ventre, Giorgio

    2012-01-01

    We present a multi-purpose genetic algorithm, designed and implemented with GPGPU / CUDA parallel computing technology. The model was derived from a multi-core CPU serial implementation, named GAME, already scientifically successfully tested and validated on astrophysical massive data classification problems, through a web application resource (DAMEWARE), specialized in data mining based on Machine Learning paradigms. Since genetic algorithms are inherently parallel, the GPGPU computing paradigm has provided an exploit of the internal training features of the model, permitting a strong optimization in terms of processing performances and scalability.

  11. Alternative treatment technology information center computer database system

    SciTech Connect

    Sullivan, D. [Environmental Protection Agency, Edison, NJ (United States)

    1995-10-01

    The Alternative Treatment Technology Information Center (ATTIC) computer database system was developed pursuant to the 1986 Superfund law amendments. It provides up-to-date information on innovative treatment technologies to clean up hazardous waste sites. ATTIC v2.0 provides access to several independent databases as well as a mechanism for retrieving full-text documents of key literature. It can be accessed with a personal computer and modem 24 hours a day, and there are no user fees. ATTIC provides {open_quotes}one-stop shopping{close_quotes} for information on alternative treatment options by accessing several databases: (1) treatment technology database; this contains abstracts from the literature on all types of treatment technologies, including biological, chemical, physical, and thermal methods. The best literature as viewed by experts is highlighted. (2) treatability study database; this provides performance information on technologies to remove contaminants from wastewaters and soils. It is derived from treatability studies. This database is available through ATTIC or separately as a disk that can be mailed to you. (3) underground storage tank database; this presents information on underground storage tank corrective actions, surface spills, emergency response, and remedial actions. (4) oil/chemical spill database; this provides abstracts on treatment and disposal of spilled oil and chemicals. In addition to these separate databases, ATTIC allows immediate access to other disk-based systems such as the Vendor Information System for Innovative Treatment Technologies (VISITT) and the Bioremediation in the Field Search System (BFSS). The user may download these programs to their own PC via a high-speed modem. Also via modem, users are able to download entire documents through the ATTIC system. Currently, about fifty publications are available, including Superfund Innovative Technology Evaluation (SITE) program documents.

  12. Three-Dimensional Nonlinear Acoustical Holography 

    E-print Network

    Niu, Yaying

    2013-05-06

    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...

  13. Some Hadronic Properties from Light Front Holography

    E-print Network

    Alfredo Vega; Ivan Schmidt; Thomas Gutsche; Valery E. Lyubovitskij

    2011-07-27

    Using ideas from Light Front Holography, we discuss the calculation of hadronic properties. In this talk I will pay special attention to hadronic masses and the nucleon helicity-independent generalized parton distributions of quarks in the zero skewness case

  14. Computer and information technology in the year 2000 - a projection

    SciTech Connect

    Lundstrom, S.F.; Larsen, R.L.

    1985-09-01

    The reasoning and conclusions drawn by a panel of experts from the National Research Council who, at the request of NASA, considered information and computer technologies which would be available in the year 2000 are reported. The deliberations covered microelectronics and components, processors, software, AI and expert systems, man-machine interfaces, systems development and implementation and high-integrity systems. It was projected that components would be 2-3 orders of magnitude more cost- and size-effective by the turn of the century. Airborne systems would carry 50 Mb RAM and perform operations at 1 GIPS. Supercomputers would have been pushed to 1 Tflops with 10 Gwords of RAM and 100-100,000 processing elements. The parallel progress in aerospace technologies will directly depend on the degree aerospace engineers access the new computing power. 7 references.

  15. C.I.S. MASTER OF COMPUTER & INFORMATION TECHNOLOGY PLAN OF STUDYC.I.S. MASTER OF COMPUTER & INFORMATION TECHNOLOGY PLAN OF STUDY NAME: DATE

    E-print Network

    Plotkin, Joshua B.

    C.I.S. MASTER OF COMPUTER & INFORMATION TECHNOLOGY PLAN OF STUDYC.I.S. MASTER OF COMPUTER & INFORMATION TECHNOLOGY PLAN OF STUDY FORMFORM NAME: DATE: PENN ID #: Expected Graduation Date: MMCCIITT/INTRODUCTION TO COMPUTER ARCHITECTURE CIT 594/PROGRAMMING LANGUAGES & TECHNIQUES II CIT 595/DIGITAL SYSTEM

  16. Integrating knowledge-based technology into computer aided ventilation systems

    Microsoft Academic Search

    Hans Gill; Ulf Ludwigs; Georg Matell; Robert Rudowski; Nosrat Shahsavar; Christer Ström; Ove Wigertz

    1990-01-01

    A knowledge-based decision support system for respirator treatment, the KUSIVAR system, has been designed in cooperation between\\u000a hospital, university and industry. Changes in patient data from respirator and monitoring equipment trigger a computer program\\u000a that generates advice to the staff concerning e.g. therapy modes and respirator settings using expert systems and process\\u000a control technology.\\u000a \\u000a A prototype has been built on

  17. 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.

  18. Grace Hopper Celebration Final Submission Materials Ripple Effects: Increasing the Diversity of Creators and Consumers of Computing Technology

    E-print Network

    Lavie, Alon

    of Creators and Consumers of Computing Technology ABSTRACT Despite major advances in computing technology computing technology to date. This panel will focus on our newest "wave" of efforts to increase diversity, beyond gender, in the creators and consumers of computing technology so that computing technology becomes

  19. Computational fluid dynamics for propulsion technology: Geometric grid visualization in CFD-based propulsion technology research

    NASA Technical Reports Server (NTRS)

    Ziebarth, John P.; Meyer, Doug

    1992-01-01

    The coordination is examined of necessary resources, facilities, and special personnel to provide technical integration activities in the area of computational fluid dynamics applied to propulsion technology. Involved is the coordination of CFD activities between government, industry, and universities. Current geometry modeling, grid generation, and graphical methods are established to use in the analysis of CFD design methodologies.

  20. International Journal of Computer and Information Technology (ISSN: 2279 0764) Volume 02 Issue 02, March 2013

    E-print Network

    Paris-Sud XI, Université de

    International Journal of Computer and Information Technology (ISSN: 2279 ­ 0764) Volume 02­ Issue or research activities of HET and their pedagogical innovative uses. However our model shows that Computer social interactions. Information and Communication Technologies (ICT) considered as General Purposes

  1. 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.)…

  2. 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.

  3. Reviews of Topical Problems: Holography and Interference Processing of Information

    Microsoft Academic Search

    L. M. Soroko

    1967-01-01

    Introduction 643 I. Fresnel-transform Holography 644 1. Formulation of Problem (644). 2. The Holography Scheme (645). 3. Read and Virtual Images (646). 4. Bleached Hologram (647). 5. Dynamic Range of Hologram (647). Holographic Microscope (647). 7. Hologram in a Thick Emulsion (648). 8. Color Holography (648). II. Interference Processing of Information 649 1. Spatial Filtering of the Structure of an

  4. Imaging a vibrating object by Sideband Digital Holography

    E-print Network

    Paris-Sud XI, Université de

    Imaging a vibrating object by Sideband Digital Holography F. Joud1, F. Lalo¨e1, M. Atlan2, J. Hare1 sideband digital holography. The frequency sidebands on the light scattered by the object, shifted by n times the vibration frequency, are selectively detected by heterodyne holography, and images

  5. ELECTRON HOLOGRAPHY OF NANOMAGNETS IN ROCKS AND BACTERIA

    E-print Network

    Dunin-Borkowski, Rafal E.

    ELECTRON HOLOGRAPHY OF NANOMAGNETS IN ROCKS AND BACTERIA Rafal E. Dunin-Borkowski1 , Richard J holography in the transmission electron microscope (TEM) to image the magnetic remanent states of a natural microstructure of the sample, measured using electron holography, reveals single-domain and vortex states

  6. Digital holography of particles: benefits of the "inverse problem" approach

    E-print Network

    Paris-Sud XI, Université de

    Digital holography of particles: benefits of the "inverse problem" approach J Gire1,2,4 , L Denis1.gire@univ-st-etienne.fr Abstract. The potential of in-line digital holography to locate and measure the size of particles for the study of particle trajectories in fluid flow. The most important issues in digital holography today are

  7. Integrating Computer Technology in Classrooms: Teacher Concerns When Implementing an Integrated Learning System.

    ERIC Educational Resources Information Center

    Mills, Steven C.

    Schools cannot expect to obtain gains in learner achievement from computer technology if it is not properly implemented. The concerns of teachers in integrating computer technology in the classroom may impact how computer technology is ultimately implemented. This study examined the concerns of elementary school teachers implementing…

  8. 2012-2013 SPECIALTY JOB LISTS Computer/Information Technology Job List

    E-print Network

    Delgado, Mauricio

    2012-2013 SPECIALTY JOB LISTS Computer/Information Technology Job List Establishing Eligibility an offer of FWSP funds on your financial aid award letter. Applying for Computer/Information Technology, Troubleshoot minor network problems. OIT - Office of Information Technology (8344) Computer Support Technician

  9. CMDF Workshop, Caltech, 05.08.23 Applied Cluster Computing Technologies Group Modeling thermal conductivity

    E-print Network

    Goddard III, William A.

    CMDF Workshop, Caltech, 05.08.23 Applied Cluster Computing Technologies Group Modeling thermal Pasadena, CA Funding: DARPA #12;CMDF Workshop, Caltech, 05.08.23 Applied Cluster Computing Technologies Workshop, Caltech, 05.08.23 Applied Cluster Computing Technologies Group Motivation: Thermoelectrics · Goal

  10. Integral Geometry and Holography

    E-print Network

    Czech, Bartlomiej; McCandlish, Samuel; Sully, James

    2015-01-01

    We present a mathematical framework which underlies the connection between information theory and the bulk spacetime in the AdS$_3$/CFT$_2$ correspondence. A key concept is kinematic space: an auxiliary Lorentzian geometry whose metric is defined in terms of conditional mutual informations and which organizes the entanglement pattern of a CFT state. When the field theory has a holographic dual obeying the Ryu-Takayanagi proposal, kinematic space has a direct geometric meaning: it is the space of bulk geodesics studied in integral geometry. Lengths of bulk curves are computed by kinematic volumes, giving a precise entropic interpretation of the length of any bulk curve. We explain how basic geometric concepts -- points, distances and angles -- are reflected in kinematic space, allowing one to reconstruct a large class of spatial bulk geometries from boundary entanglement entropies. In this way, kinematic space translates between information theoretic and geometric descriptions of a CFT state. As an example, we...

  11. Computer technology to evaluate body composition, nutrition, and exercise.

    PubMed

    Katch, F I; Katch, V L

    1983-09-01

    The use of computer technology has made it possible to make accurate determinations of body composition, nutrition, and exercise. With the FITCOMP computer assessment system, detailed measurements of physique status have been made on a variety of world-class athletes, including professional football and baseball players, as well as on diverse groups of young and older men and women throughout the United States. The FITCOMP measurement system allows the user a choice of measurement techniques: fatfolds, girths, bone diameters, and hydrostatic weighing. Combined with body composition assessment is a nutrition and exercise plan. The nutrition plan is based on guidelines formulated by the American Dietetic Association. This application of computer technology is unique, because individuals can select the foods they will eat from a list of preferred choices from the basic food groups. Individual menu plans for breakfast, lunch, and dinner are generated to provide an optimal blend of nutrients aimed at achieving ideal body mass and fat percentage. This is coupled with an aerobic exercise program that is selected by the individual from nine different forms, including walking, jogging, running, swimming, cycling, and various sport activities. The caloric output is designed to reduce total body fat through reductions in body weight of 1.4 to 2.5 pounds per week, depending on the exercise selected and total weight loss necessary to achieve a weight goal (and ideal fat percentage). The aerobic exercise plan is based on the method of overload, where intensity and duration are periodically increased dependent on individual capabilities. The use of fitness-oriented computer technology makes it possible to prepare detailed reports about current status and progress as well as to systematize record keeping. PMID:6657627

  12. Integral Geometry and Holography

    E-print Network

    Bartlomiej Czech; Lampros Lamprou; Samuel McCandlish; James Sully

    2015-05-20

    We present a mathematical framework which underlies the connection between information theory and the bulk spacetime in the AdS$_3$/CFT$_2$ correspondence. A key concept is kinematic space: an auxiliary Lorentzian geometry whose metric is defined in terms of conditional mutual informations and which organizes the entanglement pattern of a CFT state. When the field theory has a holographic dual obeying the Ryu-Takayanagi proposal, kinematic space has a direct geometric meaning: it is the space of bulk geodesics studied in integral geometry. Lengths of bulk curves are computed by kinematic volumes, giving a precise entropic interpretation of the length of any bulk curve. We explain how basic geometric concepts -- points, distances and angles -- are reflected in kinematic space, allowing one to reconstruct a large class of spatial bulk geometries from boundary entanglement entropies. In this way, kinematic space translates between information theoretic and geometric descriptions of a CFT state. As an example, we discuss in detail the static slice of AdS$_3$ whose kinematic space is two-dimensional de Sitter space.

  13. 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.

  14. Properties of Confinement in Holography

    E-print Network

    Giataganas, Dimitrios

    2015-01-01

    We review certain properties of confinement with added focus on the ones we study with holography. Then we discuss observables whose unique behavior can indicate the presence of confinement. Using mainly the Wilson loop in the gauge/gravity formalism, we study two main features of the QCD string: the string tension dependence on the temperature while in the confining phase, and the logarithmic broadening of the flux tube between the heavy static charges that turns out to be a generic property of all confining theories. Finally, we review the k-string bound state and we show that for a wide class of generic theories the k-string observables can be expressed in terms of the single meson bound state observables.

  15. Even spin minimal model holography

    E-print Network

    Candu, Constantin; Kelm, Maximilian; Vollenweider, Carl

    2012-01-01

    The even spin W^e_\\infty algebra that is generated by the stress energy tensor together with one Virasoro primary field for every even spin s \\geq 4 is analysed systematically by studying the constraints coming from the Jacobi identities. It is found that the algebra is characterised, in addition to the central charge, by one free parameter that can be identified with the self-coupling constant of the spin 4 field. We show that W^e_\\infty can be thought of as the quantisation of the asymptotic symmetry algebra of the even higher spin theory on AdS_3. On the other hand, W^e_\\infty is also quantum equivalent to the so(N) coset algebras, and thus our result establishes an important aspect of the even spin minimal model holography conjecture. The quantum equivalence holds actually at finite central charge, and hence opens the way towards understanding the duality beyond the leading 't Hooft limit.

  16. Visualizing Breath using Digital Holography

    NASA Astrophysics Data System (ADS)

    Hobson, P. R.; Reid, I. D.; Wilton, J. B.

    2013-02-01

    Artist Jayne Wilton and physicists Peter Hobson and Ivan Reid of Brunel University are collaborating at Brunel University on a project which aims to use a range of techniques to make visible the normally invisible dynamics of the breath and the verbal and non-verbal communication it facilitates. The breath is a source of a wide range of chemical, auditory and physical exchanges with the direct environment. Digital Holography is being investigated to enable a visually stimulating articulation of the physical trajectory of the breath as it leaves the mouth. Initial findings of this research are presented. Real time digital hologram replay allows the audience to move through holographs of breath-born particles.

  17. Digital holography-based steganography.

    PubMed

    Hamam, Habib

    2010-12-15

    A steganographic method offering a high hiding capacity is presented in which the techniques of digital holography are used to distribute information from a small secret image across the larger pixel field of a cover image. An iterative algorithm is used to design a phase-only or complex hologram from a padded version of the secret image, quantizing this data according to the carrier data bits that are available within the intended cover image. By introducing the hologram data only into low-order bits of larger amplitude cover pixels, the change in the cover image remains imperceptible to the casual observer, with a peak signal-to-noise ratio of >40 dB. PMID:21165128

  18. Properties of Confinement in Holography

    E-print Network

    Dimitrios Giataganas

    2015-05-26

    We review certain properties of confinement with added focus on the ones we study with holography. Then we discuss observables whose unique behavior can indicate the presence of confinement. Using mainly the Wilson loop in the gauge/gravity formalism, we study two main features of the QCD string: the string tension dependence on the temperature while in the confining phase, and the logarithmic broadening of the flux tube between the heavy static charges that turns out to be a generic property of all confining theories. Finally, we review the k-string bound state and we show that for a wide class of generic theories the k-string observables can be expressed in terms of the single meson bound state observables.

  19. 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.

  20. 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.

  1. Microstructure measurement of digital holography

    NASA Astrophysics Data System (ADS)

    Li, Jicheng; Tian, Ailing; Wang, Hongjun; Zhu, Xueliang; Wang, Chunhui; Liu, Bingcai; Asundi, Anand

    2015-02-01

    Miniaturization is a development trend of electronics, machinery and information systems, while micro structure brought a large amount of new development for industrial and research applications, whereas, slow measuring speed and two-dimensional results of traditional micro measurement could not meet our needs, it's urgent to find a matching testing techniques with more sensitivity, more effectiveness and better to have a real-time three-dimensional display. Digital holography applied to the measurement of micro structure, it made up for the lacking of traditional micro structure measure systems of too much time consuming, poor immunity, easily damaging samples with its simple structure, high accuracy, non contact features and three-dimensional reproduction. This paper analyzed the key factors of digital holographic recording and reproducing process.In order to solve the low quality of holograms captured by traditional recording system, holograms and pre-processing algorithm was combined for real-time, by observing the holograms and delicate adjusting the system, to ensure that the collected holograms with full use of CCD width while convenient for subsequent processing. In the processing of reproduction,the influence of spectrum choice, reconstruction wavelength and algorithms and unwrapping algorithm was been studied, and finally obtained an accurate three-dimensional topography of the object. The improved rerecording system and reconstruction algorithm mentioned above solved the low holography quality, much noise and not clear shortcomings of the reconstructed image. Experiment on a raster, compared with traditional system and algorithm results, results showed that the recording system and determine algorithms can reproduce the three-dimensional topography of the object with high precision and has a broader applicability.

  2. Japanese technology assessment: Computer science, opto- and microelectronics mechatronics, biotechnology

    SciTech Connect

    Brandin, D.; Wieder, H.; Spicer, W.; Nevins, J.; Oxender, D.

    1986-01-01

    The series studies Japanese research and development in four high-technology areas - computer science, opto and microelectronics, mechatronics (a term created by the Japanese to describe the union of mechanical and electronic engineering to produce the next generation of machines, robots, and the like), and biotechnology. The evaluations were conducted by panels of U.S. scientists - chosen from academia, government, and industry - actively involved in research in areas of expertise. The studies were prepared for the purpose of aiding the U.S. response to Japan's technological challenge. The main focus of the assessments is on the current status and long-term direction and emphasis of Japanese research and development. Other aspects covered include evolution of the state of the art; identification of Japanese researchers, R and D organizations, and resources; and comparative U.S. efforts. The general time frame of the studies corresponds to future industrial applications and potential commercial impacts spanning approximately the next two decades.

  3. Emerging computer technologies and the news media of the future

    NASA Technical Reports Server (NTRS)

    Vrabel, Debra A.

    1993-01-01

    The media environment of the future may be dramatically different from what exists today. As new computing and communications technologies evolve and synthesize to form a global, integrated communications system of networks, public domain hardware and software, and consumer products, it will be possible for citizens to fulfill most information needs at any time and from any place, to obtain desired information easily and quickly, to obtain information in a variety of forms, and to experience and interact with information in a variety of ways. This system will transform almost every institution, every profession, and every aspect of human life--including the creation, packaging, and distribution of news and information by media organizations. This paper presents one vision of a 21st century global information system and how it might be used by citizens. It surveys some of the technologies now on the market that are paving the way for new media environment.

  4. SAR data exploitation: computational technology enabling SAR ATR algorithm development

    NASA Astrophysics Data System (ADS)

    Majumder, Uttam K.; Casteel, Curtis H., Jr.; Buxa, Peter; Minardi, Michael J.; Zelnio, Edmund G.; Nehrbass, John W.

    2007-04-01

    A fundamental issue with synthetic aperture radar (SAR) application development is data processing and exploitation in real-time or near real-time. The power of high performance computing (HPC) clusters, FPGA, and the IBM Cell processor presents new algorithm development possibilities that have not been fully leveraged. In this paper, we will illustrate the capability of SAR data exploitation which was impractical over the last decade due to computing limitations. We can envision that SAR imagery encompassing city size coverage at extremely high levels of fidelity could be processed at near-real time using the above technologies to empower the warfighter with access to critical information for the war on terror, homeland defense, as well as urban warfare.

  5. 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.

  6. Markov chain Monte Carlo sampling based terahertz holography image denoising.

    PubMed

    Chen, Guanghao; Li, Qi

    2015-05-10

    Terahertz digital holography has attracted much attention in recent years. This technology combines the strong transmittance of terahertz and the unique features of digital holography. Nonetheless, the low clearness of the images captured has hampered the popularization of this imaging technique. In this paper, we perform a digital image denoising technique on our multiframe superposed images. The noise suppression model is concluded as Bayesian least squares estimation and is solved with Markov chain Monte Carlo (MCMC) sampling. In this algorithm, a weighted mean filter with a Gaussian kernel is first applied to the noisy image, and then by nonlinear contrast transform, the contrast of the image is restored to the former level. By randomly walking on the preprocessed image, the MCMC-based filter keeps collecting samples, assigning them weights by similarity assessment, and constructs multiple sample sequences. Finally, these sequences are used to estimate the value of each pixel. Our algorithm shares some good qualities with nonlocal means filtering and the algorithm based on conditional sampling proposed by Wong et al. [Opt. Express18, 8338 (2010)10.1364/OE.18.008338OPEXFF1094-4087], such as good uniformity, and, moreover, reveals better performance in structure preservation, as shown in numerical comparison using the structural similarity index measurement and the peak signal-to-noise ratio. PMID:25967487

  7. Microscopy based on digital lensless Fourier transforms holography

    NASA Astrophysics Data System (ADS)

    Chen, Zhaoji; Liu, Feifei; Gong, Wendi; Wang, Huaying

    2010-11-01

    With the recent technological advances, there is an increasing need for testing the microstructure of objects. We show here Digital Holographic Microscopy (DHM) that implements digitally the principle of holography. It is particularly well suited for recording and reconstructing three-dimensional objects. In this paper, we present an off-axis digital holographic configuration and address some basic issues of the off-axis lensless Fourier transform digital holography including the recording conditions and the methods to improve the imaging performance. Following the theoretical analysis, the simple imaging system with the off-axis arrangement is built. Through using the resolution test target as microscopic object, the recorded holograms are reconstructed digitally based on the principle of Fresnel diffraction. The experimental results are consistent with the theoretical analysis. In addition, from the experimental operations and the design of reconstruction procedure we can see that the off-axis lensless Fourier-transform digital holographic setup is simple and suitable for real-time applications in microscopy.

  8. An easy teaching tool for holography

    NASA Astrophysics Data System (ADS)

    Voslion, T.; Escarguel, A.

    2012-11-01

    In the framework of scientific outreach at the Maison des Sciences of Aix-Marseilles University, we created a teaching kit for holography that can be packed into a small case. It includes all the equipment required to produce holograms almost anywhere and has a simple optical assembly and very good vibration tolerance. The fundamental principles of holography and several applications are illustrated through simple experiments: reflection Denisyuk holograms, angular multiplexing, notch filters, holographic interferometry and diffraction holographic gratings. It is possible to use this tool for several purposes: science outreach, teaching for undergraduate and graduate students and continuing education. In this paper, we explain the basis of holography, how the kit works and indicate some applications and results that can be performed and obtained with it.

  9. X-Ray Gabor Holography Using a Scanning Force Microscope

    NASA Astrophysics Data System (ADS)

    Lindaas, Stephen Andrew

    Soft x-ray microscopy offers an approach to transmission imaging of wet, micron-thick biological objects at a resolution superior to that of optical microscopes. Gabor holography has unique characteristics which make it particularly well suited for certain investigations: it requires no prefocussing, it is compatible with flash x-ray sources, and it is able to use the whole footprint of multimode sources. Gabor holography requires the use of a high resolution recording medium; our work employs the photoresist poly(methylmethacrylate). We use a soft x-ray undulator and beamline to obtain coherent x-rays in the water window (between the C-K and O-K absorption edges) with which we record holograms in vacuum or in air. The developed photoresist records hologram fringes as surface topography; we have therefore developed a scanning force microscope with a highly linear (~0.05%) scanning stage for hologram read-out. Optical holographic reconstruction involves propagating the illumination wave through the hologram and recording the reconstructed image intensity; we carry out that process numerically with a computer, except that we can obtain both the magnitude and phase of the reconstructed wavefield. With this approach, we have imaged the periphery of critical point dried cells, and have obtained sub 45 nm resolution (the best obtained by an x-ray holographic technique to date) on dry diatoms. We have also reconstructed holograms of latex spheres (an organic object) recorded in air and in an aqueous environment.

  10. Implementation of Parallel Computing Technology to Vortex Flow

    NASA Technical Reports Server (NTRS)

    Dacles-Mariani, Jennifer

    1999-01-01

    Mainframe supercomputers such as the Cray C90 was invaluable in obtaining large scale computations using several millions of grid points to resolve salient features of a tip vortex flow over a lifting wing. However, real flight configurations require tracking not only of the flow over several lifting wings but its growth and decay in the near- and intermediate- wake regions, not to mention the interaction of these vortices with each other. Resolving and tracking the evolution and interaction of these vortices shed from complex bodies is computationally intensive. Parallel computing technology is an attractive option in solving these flows. In planetary science vortical flows are also important in studying how planets and protoplanets form when cosmic dust and gases become gravitationally unstable and eventually form planets or protoplanets. The current paradigm for the formation of planetary systems maintains that the planets accreted from the nebula of gas and dust left over from the formation of the Sun. Traditional theory also indicate that such a preplanetary nebula took the form of flattened disk. The coagulation of dust led to the settling of aggregates toward the midplane of the disk, where they grew further into asteroid-like planetesimals. Some of the issues still remaining in this process are the onset of gravitational instability, the role of turbulence in the damping of particles and radial effects. In this study the focus will be with the role of turbulence and the radial effects.

  11. 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…

  12. Computation Directorate and Science& Technology Review Computational Science and Research Featured in 2002

    SciTech Connect

    Alchorn, A L

    2003-04-04

    Thank you for your interest in the activities of the Lawrence Livermore National Laboratory Computation Directorate. This collection of articles from the Laboratory's Science & Technology Review highlights the most significant computational projects, achievements, and contributions during 2002. In 2002, LLNL marked the 50th anniversary of its founding. Scientific advancement in support of our national security mission has always been the core of the Laboratory. So that researchers could better under and predict complex physical phenomena, the Laboratory has pushed the limits of the largest, fastest, most powerful computers in the world. In the late 1950's, Edward Teller--one of the LLNL founders--proposed that the Laboratory commission a Livermore Advanced Research Computer (LARC) built to Livermore's specifications. He tells the story of being in Washington, DC, when John Von Neumann asked to talk about the LARC. He thought Teller wanted too much memory in the machine. (The specifications called for 20-30,000 words.) Teller was too smart to argue with him. Later Teller invited Von Neumann to the Laboratory and showed him one of the design codes being prepared for the LARC. He asked Von Neumann for suggestions on fitting the code into 10,000 words of memory, and flattered him about ''Labbies'' not being smart enough to figure it out. Von Neumann dropped his objections, and the LARC arrived with 30,000 words of memory. Memory, and how close memory is to the processor, is still of interest to us today. Livermore's first supercomputer was the Remington-Rand Univac-1. It had 5600 vacuum tubes and was 2 meters wide by 4 meters long. This machine was commonly referred to as a 1 KFlop machine [E+3]. Skip ahead 50 years. The ASCI White machine at the Laboratory today, produced by IBM, is rated at a peak performance of 12.3 TFlops or E+13. We've improved computer processing power by 10 orders of magnitude in 50 years, and I do not believe there's any reason to think we won't improve another 10 orders of magnitude in the next 50 years. For years I have heard talk of hitting the physical limits of Moore's Law, but new technologies will take us into the next phase of computer processing power such as 3-D chips, molecular computing, quantum computing, and more. Big computers are icons or symbols of the culture and larger infrastructure that exists at LLNL to guide scientific discovery and engineering development. We have dealt with balance issues for 50 years and will continue to do so in our quest for a digital proxy of the properties of matter at extremely high temperatures and pressures. I believe that the next big computational win will be the merger of high-performance computing with information management. We already create terabytes--soon to be petabytes--of data. Efficiently storing, finding, visualizing and extracting data and turning that into knowledge which aids decision-making and scientific discovery is an exciting challenge. In the meantime, please enjoy this retrospective on computational physics, computer science, advanced software technologies, and applied mathematics performed by programs and researchers at LLNL during 2002. It offers a glimpse into the stimulating world of computational science in support of the national missions and homeland defense.

  13. Two-dimensional lensless object scanning holography

    NASA Astrophysics Data System (ADS)

    Ferreira, Carlos; García, Javier; Micó, Vicente

    2012-10-01

    Lensless object scanning holography (LOSH) has been recently proposed as a fully lensless method, capable of improving image quality in reflective digital Fourier holography, and involving an extremely simplified experimental setup. LOSH is based on the recording and post-processing of a set of digital lensless holograms which finally yields in a synthetic image with improved resolution, field of view (FOV), signal-to-noise ratio (SNR), and depth of field (DOF). LOSH validation has been previously validated for one-dimensional (1D) objects and now it is expanded to twodimensional (2D) ones. Experimental results are presented showing an impressive image quality improvement.

  14. Surface roughness measurement by digital holography

    NASA Astrophysics Data System (ADS)

    Li, Yan; Wang, Dayong; Zhao, Jie; Wang, Guangjun; Wang, Yunxin

    2010-10-01

    Surface roughness is crucial guideline to the surface quantity of work piece. This paper demonstrates a simple approach for measurement of surface roughness by using digital holography imaging method based on reflection off-axis lensless Fourier transform (LFT) holography. The surface profiles of the standard roughness sample plates which have the different arithmetic average height values are used as the measurement sample. Comparing the arithmetical average height values of the roughness sample plates obtained from the experiment with the given parameters, the results are in good agreement. It has shown that the method is reasonable and efficient.

  15. Holography on the Spacelab 3 mission

    NASA Technical Reports Server (NTRS)

    Owen, Robert B.; Kroes, R. L.

    1985-01-01

    Spacelab 3's Fluid Experiment System, in which triglycine sulfate crystals were produced by a low temperature solution-growth technique, employs holography as its primary data-gathering system. This use of holography allows optical techniques which would be difficult to apply in orbit to be used after the holographic data is returned to ground laboratories, using an analysis of the reconstructed holographic image. The system used allows both single- and double-exposure holograms to be obtained in two separate orthogonal configurations.

  16. Teacher Perspectives on the Current State of Computer Technology Integration into the Public School Classroom

    ERIC Educational Resources Information Center

    Zuniga, Ramiro

    2009-01-01

    Since the introduction of computers into the public school arena over forty years ago, educators have been convinced that the integration of computer technology into the public school classroom will transform education. Joining educators are state and federal governments. Public schools and others involved in the process of computer technology…

  17. 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

  18. Impact of Computer Technology on the Child in a Narcissistic Culture.

    ERIC Educational Resources Information Center

    Searles, John E.

    1981-01-01

    Advances in information/computer technology have produced the mental revolution which may cause radical social changes. The world faces the choice of using computers as a liberating technology to free teachers and students for other pursuits or allowing computers to function as pacifying institutions where students become passive participants in…

  19. Cloud Computing Forum & Workshop IV Agenda National Institute of Standards and Technology

    E-print Network

    Cloud Computing Forum & Workshop IV Agenda National Institute of Standards and Technology 100 Policy, Department of State 1. Yeong Ro Lee, National Standards Coordinator for Cloud Computing for Information Society and Media, European Commission 10:40 11:00 USG Cloud Computing Technology Roadmap

  20. Technology-Independent Design of Neurocomputers: The Universal Field Computer1

    E-print Network

    MacLennan, Bruce

    Technology-Independent Design of Neurocomputers: The Universal Field Computer1 Bruce J. Mac expect, a new generation of analog computers. Current AI technology has been quite successful in a numberLennan Computer Science Department Naval Postgraduate School Monterey, CA 93943 Abstract We argue that AI

  1. A Selective Review of Educational Computer Technology in American Community Colleges.

    ERIC Educational Resources Information Center

    Kerley, Douglas W.

    After presenting a brief history of computer-assisted instruction (CAI), this paper provides an overview of the current uses of computer technology in instruction at U.S. community colleges. This profile focuses on the ways in which the technology has been spread throughout the curriculum, the characteristics of computer laboratories, and the…

  2. 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.

  3. Numerical Technology for Large-Scale Computational Electromagnetics

    SciTech Connect

    Sharpe, R; Champagne, N; White, D; Stowell, M; Adams, R

    2003-01-30

    The key bottleneck of implicit computational electromagnetics tools for large complex geometries is the solution of the resulting linear system of equations. The goal of this effort was to research and develop critical numerical technology that alleviates this bottleneck for large-scale computational electromagnetics (CEM). The mathematical operators and numerical formulations used in this arena of CEM yield linear equations that are complex valued, unstructured, and indefinite. Also, simultaneously applying multiple mathematical modeling formulations to different portions of a complex problem (hybrid formulations) results in a mixed structure linear system, further increasing the computational difficulty. Typically, these hybrid linear systems are solved using a direct solution method, which was acceptable for Cray-class machines but does not scale adequately for ASCI-class machines. Additionally, LLNL's previously existing linear solvers were not well suited for the linear systems that are created by hybrid implicit CEM codes. Hence, a new approach was required to make effective use of ASCI-class computing platforms and to enable the next generation design capabilities. Multiple approaches were investigated, including the latest sparse-direct methods developed by our ASCI collaborators. In addition, approaches that combine domain decomposition (or matrix partitioning) with general-purpose iterative methods and special purpose pre-conditioners were investigated. Special-purpose pre-conditioners that take advantage of the structure of the matrix were adapted and developed based on intimate knowledge of the matrix properties. Finally, new operator formulations were developed that radically improve the conditioning of the resulting linear systems thus greatly reducing solution time. The goal was to enable the solution of CEM problems that are 10 to 100 times larger than our previous capability.

  4. Enabling Technologies for Scalable Trapped Ion Quantum Computing

    NASA Astrophysics Data System (ADS)

    Crain, Stephen; Gaultney, Daniel; Mount, Emily; Knoernschild, Caleb; Baek, Soyoung; Maunz, Peter; Kim, Jungsang

    2013-05-01

    Scalability is one of the main challenges of trapped ion based quantum computation, mainly limited by the lack of enabling technologies needed to trap, manipulate and process the increasing number of qubits. Microelectromechanical systems (MEMS) technology allows one to design movable micromirrors to focus laser beams on individual ions in a chain and steer the focal point in two dimensions. Our current MEMS system is designed to steer 355 nm pulsed laser beams to carry out logic gates on a chain of Yb ions with a waist of 1.5 ?m across a 20 ?m range. In order to read the state of the qubit chain we developed a 32-channel PMT with a custom read-out circuit operating near the thermal noise limit of the readout amplifier which increases state detection fidelity. We also developed a set of digital to analog converters (DACs) used to supply analog DC voltages to the electrodes of an ion trap. We designed asynchronous DACs to avoid added noise injection at the update rate commonly found in synchronous DACs. Effective noise filtering is expected to reduce the heating rate of a surface trap, thus improving multi-qubit logic gate fidelities. Our DAC system features 96 channels and an integrated FPGA that allows the system to be controlled in real time. Scalability is one of the main challenges of trapped ion based quantum computation, mainly limited by the lack of enabling technologies needed to trap, manipulate and process the increasing number of qubits. Microelectromechanical systems (MEMS) technology allows one to design movable micromirrors to focus laser beams on individual ions in a chain and steer the focal point in two dimensions. Our current MEMS system is designed to steer 355 nm pulsed laser beams to carry out logic gates on a chain of Yb ions with a waist of 1.5 ?m across a 20 ?m range. In order to read the state of the qubit chain we developed a 32-channel PMT with a custom read-out circuit operating near the thermal noise limit of the readout amplifier which increases state detection fidelity. We also developed a set of digital to analog converters (DACs) used to supply analog DC voltages to the electrodes of an ion trap. We designed asynchronous DACs to avoid added noise injection at the update rate commonly found in synchronous DACs. Effective noise filtering is expected to reduce the heating rate of a surface trap, thus improving multi-qubit logic gate fidelities. Our DAC system features 96 channels and an integrated FPGA that allows the system to be controlled in real time. This work was supported by IARPA/ARO.

  5. Supra-gigabit/second (SGb/s) computer communication technologies

    SciTech Connect

    Pierson, L.G.

    1996-12-01

    High network performance is essential to satisfying a wide class of High Performance Computing and Communication (HPCC) user needs. The requirements of these applications for high throughput and low interactive response time have focused this research on the scaling of technology far past the performance of the newest data telecommunication industry standards in order to facilitate the design of communication systems of interest to the HPCC community. These applications require Local Area Network (LAN) and Wide Area Network (WAN) performance in the 10 to 100 Gigabit per second (Gb/s) range, far greater than the 0.05 Gb/s performance typical of today`s LANs or WANs. This research investigated various approaches to achieving 10 to 100 Gigabit per second performance, developed a communication architecture to achieve this performance, and tested the viability of selected techniques through simulation and prototyping.

  6. 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.

  7. Missile signal processing common computer architecture for rapid technology upgrade

    NASA Astrophysics Data System (ADS)

    Rabinkin, Daniel V.; Rutledge, Edward; Monticciolo, Paul

    2004-10-01

    Interceptor missiles process IR images to locate an intended target and guide the interceptor towards it. Signal processing requirements have increased as the sensor bandwidth increases and interceptors operate against more sophisticated targets. A typical interceptor signal processing chain is comprised of two parts. Front-end video processing operates on all pixels of the image and performs such operations as non-uniformity correction (NUC), image stabilization, frame integration and detection. Back-end target processing, which tracks and classifies targets detected in the image, performs such algorithms as Kalman tracking, spectral feature extraction and target discrimination. In the past, video processing was implemented using ASIC components or FPGAs because computation requirements exceeded the throughput of general-purpose processors. Target processing was performed using hybrid architectures that included ASICs, DSPs and general-purpose processors. The resulting systems tended to be function-specific, and required custom software development. They were developed using non-integrated toolsets and test equipment was developed along with the processor platform. The lifespan of a system utilizing the signal processing platform often spans decades, while the specialized nature of processor hardware and software makes it difficult and costly to upgrade. As a result, the signal processing systems often run on outdated technology, algorithms are difficult to update, and system effectiveness is impaired by the inability to rapidly respond to new threats. A new design approach is made possible three developments; Moore's Law - driven improvement in computational throughput; a newly introduced vector computing capability in general purpose processors; and a modern set of open interface software standards. Today's multiprocessor commercial-off-the-shelf (COTS) platforms have sufficient throughput to support interceptor signal processing requirements. This application may be programmed under existing real-time operating systems using parallel processing software libraries, resulting in highly portable code that can be rapidly migrated to new platforms as processor technology evolves. Use of standardized development tools and 3rd party software upgrades are enabled as well as rapid upgrade of processing components as improved algorithms are developed. The resulting weapon system will have a superior processing capability over a custom approach at the time of deployment as a result of a shorter development cycles and use of newer technology. The signal processing computer may be upgraded over the lifecycle of the weapon system, and can migrate between weapon system variants enabled by modification simplicity. This paper presents a reference design using the new approach that utilizes an Altivec PowerPC parallel COTS platform. It uses a VxWorks-based real-time operating system (RTOS), and application code developed using an efficient parallel vector library (PVL). A quantification of computing requirements and demonstration of interceptor algorithm operating on this real-time platform are provided.

  8. High-resolution digital holography applied to micro-structure measurement

    Microsoft Academic Search

    Baoqun Zhao; Aili Qin; Huaying Wang

    2009-01-01

    Digital holography has been demonstrated to be a useful tool in metrology. In this paper, the theoretical-limited resolution of digital holographic imaging system without pre-magnification is presented. The recording condition of off-axis lensless Fourier transform digital hologram is analyzed briefly. By using an automatic aberration compensation procedure proposed by T. Colomb, the computer simulation and the experimental investigation of wavefront

  9. Robust Monte Carlo Algorithms Centre for Advanced Computing and Emerging Technologies

    E-print Network

    Dimov, Ivan

    Robust Monte Carlo Algorithms Ivan Dimov Centre for Advanced Computing and Emerging Technologies Remarks ­ Areas of Application in Science and Technologies · Robust Monte Carlo Algorithms ­ Basic Linear Algebra Problems ­ Evaluation of Matrix Polynomials ­ Robust Monte Carlo Algorithms ­ Interpolation

  10. Elicitation of natural language representations of uncertainty using computer technology

    SciTech Connect

    Tonn, B.; Goeltz, R.; Travis, C. (Oak Ridge National Lab., TN (USA); Tennessee Univ., Knoxville, TN (USA))

    1989-01-01

    Knowledge elicitation is an important aspect of risk analysis. Knowledge about risks must be accurately elicited from experts for use in risk assessments. Knowledge and perceptions of risks must also be accurately elicited from the public in order to intelligently perform policy analysis and develop and implement programs. Oak Ridge National Laboratory is developing computer technology to effectively and efficiently elicit knowledge from experts and the public. This paper discusses software developed to elicit natural language representations of uncertainty. The software is written in Common Lisp and resides on VAX Computers System and Symbolics Lisp machines. The software has three goals, to determine preferences for using natural language terms for representing uncertainty; likelihood rankings of the terms; and how likelihood estimates are combined to form new terms. The first two goals relate to providing useful results for those interested in risk communication. The third relates to providing cognitive data to further our understanding of people's decision making under uncertainty. The software is used to elicit natural language terms used to express the likelihood of various agents causing cancer in humans and cancer resulting in various maladies, and the likelihood of everyday events. 6 refs., 4 figs., 4 tabs.

  11. Promoting Physical Activity through Hand-Held Computer Technology

    PubMed Central

    King, Abby C.; Ahn, David K.; Oliveira, Brian M.; Atienza, Audie A.; Castro, Cynthia M.; Gardner, Christopher D.

    2009-01-01

    Background Efforts to achieve population-wide increases in walking and similar moderate-intensity physical activities potentially can be enhanced through relevant applications of state-of-the-art interactive communication technologies. Yet few systematic efforts to evaluate the efficacy of hand-held computers and similar devices for enhancing physical activity levels have occurred. The purpose of this first-generation study was to evaluate the efficacy of a hand-held computer (i.e., personal digital assistant [PDA]) for increasing moderate intensity or more vigorous (MOD+) physical activity levels over 8 weeks in mid-life and older adults relative to a standard information control arm. Design Randomized, controlled 8-week experiment. Data were collected in 2005 and analyzed in 2006-2007. Setting/Participants Community-based study of 37 healthy, initially underactive adults aged 50 years and older who were randomized and completed the 8-week study (intervention=19, control=18). Intervention Participants received an instructional session and a PDA programmed to monitor their physical activity levels twice per day and provide daily and weekly individualized feedback, goal setting, and support. Controls received standard, age-appropriate written physical activity educational materials. Main Outcome Measure Physical activity was assessed via the Community Healthy Activities Model Program for Seniors (CHAMPS) questionnaire at baseline and 8 weeks. Results Relative to controls, intervention participants reported significantly greater 8-week mean estimated caloric expenditure levels and minutes per week in MOD+ activity (p<0.04). Satisfaction with the PDA was reasonably high in this largely PDA-naive sample. Conclusions Results from this first-generation study indicate that hand-held computers may be effective tools for increasing initial physical activity levels among underactive adults. PMID:18201644

  12. The Institute for Computer Sciences and Technology and the National Computer, Security Center are pleased to welcome you to this Annual

    E-print Network

    #12;WELCOME The Institute for Computer Sciences and Technology and the National Computer, Security to improve computer security continues to·grow, and trusted systems and other technologies are becoming Computer Security and Technology Center i #12;TABLE OF CONTENTS Title Page A Brief Summary

  13. Synthetic optical holography for rapid nanoimaging

    PubMed Central

    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

  14. BRIEF COMMUNICATIONS: Holography of smooth metal objects

    Microsoft Academic Search

    V. N. Vasil'ev; L. V. Strygin

    1976-01-01

    Photographs were obtained of images reconstructed from holograms of smooth metal objects in the form of a cone, cylinder, and truncated cone. The scattered field was recorded by lensless Fourier holography in the far diffraction zone. In the reconstruction stage a hologram was placed alongside a lens and the image was photographed in the focal plane of the lens. It

  15. Microwave holography by rotational scanning of object

    Microsoft Academic Search

    KUNIYOSHI YAMANE; MASARU MATSUO

    1978-01-01

    A rotational scanning technique useful in microwave holography is developed. This technique has the special feature that the recording structure can be constructed on a smaller scale than a conventional scanning technique, and that a lensless Fourier transform hologram is obtainable. The theoretical aspect of this new holographic arrangement and experimental evidence in support of the theory are presented.

  16. Microscopical Method by Digital MicroHolography

    Microsoft Academic Search

    Hehua Xu; Aili Qin; Wei Liao

    2009-01-01

    Digital microscopic holographic recording and numerical reconstruction and the lateral resolution of holographic system were analyzed. Based on off-axis lensless Fourier transform digital holography the two popular phase reconstruction methods proposed by T. Colomb and by S. De Nicola were discussed and simulated. The results show that both the automatic phase compensation approach and the lateral shearing interference combining DH

  17. High-resolution lensless Fouriertransform digital holography

    Microsoft Academic Search

    Istvan Banyasz; Janos Kornis

    2005-01-01

    The aim of this work was to study the possibility of improving the resolution of digital holography. To achieve this goal we recorded digital holograms of microlines of width in the micrometer region in a lensless Fourier-transform setup. In such a way spatial frequency of the hologram can be reduced in high numerical aperture geometry. A He-Ne laser was used

  18. Data extraction system for underwater particle holography

    Microsoft Academic Search

    J. J. Nebrensky; Gary Craig; Peter R. Hobson; R. S. Lampitt; Helge Nareid; A. Pescetto; Andrea Trucco; John Watson

    2000-01-01

    Pulsed laser holography in an extremely powerful technique for the study of particle fields as it allows instantaneous, non-invasive high- resolution recording of substantial volumes. By relaying the real image one can obtain the size, shape, position and - if multiple exposures are made - velocity of every object in the recorded field. Manual analysis of large volumes containing thousands

  19. Applications of holography to condensed matter physics

    Microsoft Academic Search

    Simon F Ross

    2012-01-01

    Holography is one of the key insights to emerge from string theory. It connects quantum gravity to field theory, and thereby provides a non-perturbative formulation of string theory. This has enabled progress on a range of theoretical issues, from the quantum description of spacetime to the calculation of scattering amplitudes in supersymmetric field theories. There have been important insights into

  20. Examining the Psychological Impact of Computer Technology: An Updated Cross-Cultural Study

    ERIC Educational Resources Information Center

    Marcoulides, George A.; Stocker, Yvonne-Olivia; Marcoulides, Laura D.

    2004-01-01

    The Computer Anxiety Scale (CAS) is a measure of perceptions by individuals of their anxiety in different situations toward computers. The CAS was developed a number of years ago before computer technology became such an integral part of life. Covariance modeling techniques were used to examine whether the originally proposed construct of computer…

  1. Historical Context: The Relationship of Computer Technologies and Counseling. ERIC/CASS Digest.

    ERIC Educational Resources Information Center

    Granello, Paul F.

    Computers have been around since 1946. The relationship between computers and counseling, and in a wider sense psychotherapy, has existed for decades. The impact of computer technologies on counseling has changed over time. The purpose of this digest is to summarize and review the historical events of the counseling-computer relations. This will…

  2. Cloud Computing Forum & Workshop III Agenda National Institute of Standards and Technology

    E-print Network

    Cloud Computing Forum & Workshop III Agenda National Institute of Standards and Technology 100 of IT and Telecommunications Industries, World Economic Forum USA 9:30 ­ 10:20 Cloud Computing: Adopters' Long-term View, Panel Computing Program & Forum (10 min Q&A) Dawn Leaf, NIST Senior Executive for Cloud Computing 10:50 ­ 11

  3. 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.

  4. Terahertz digital holography image denoising using stationary wavelet transform

    NASA Astrophysics Data System (ADS)

    Cui, Shan-Shan; Li, Qi; Chen, Guanghao

    2015-04-01

    Terahertz (THz) holography is a frontier technology in terahertz imaging field. However, reconstructed images of holograms are inherently affected by speckle noise, on account of the coherent nature of light scattering. Stationary wavelet transform (SWT) is an effective tool in speckle noise removal. In this paper, two algorithms for despeckling SAR images are implemented to THz images based on SWT, which are threshold estimation and smoothing operation respectively. Denoised images are then quantitatively assessed by speckle index. Experimental results show that the stationary wavelet transform has superior denoising performance and image detail preservation to discrete wavelet transform. In terms of the threshold estimation, high levels of decomposing are needed for better denoising result. The smoothing operation combined with stationary wavelet transform manifests the optimal denoising effect at single decomposition level, with 5×5 average filtering.

  5. Fringe Contrast and Phase Effects in Multicolour Holography

    Microsoft Academic Search

    C. S. Vikram; W. K. Witherow; J. D. Trolinger

    1994-01-01

    The role of phase difference among component holograms in multi-colour holography is described from the hologram fringe contrast point of view. The fraction of the hologram below a certain contrast factor against different phases and hologram types is considered. The holographic techniques considered are two- and three-colour holography with irrationally related wavelengths, and two-colour holography with frequency-doubled lasers.

  6. Acquisition and Processing of Phase Information with Digital Holography

    Microsoft Academic Search

    Xiufa Song; Baoqun Zhao; Hehua Xu

    2009-01-01

    Digital holography is a digitized holography. The quantitative phase reconstruction is the unique advantage of digital holography. The recording and numerical reconstruction of digital hologram was analyzed. An off-axis lensless Fourier holographic setup and an off-axis Fresnel holographic system with pre-magnification were built. The phase aberration of the two types systems were analyzed and compared. A phase reconstruction method based

  7. Charged AdS black holes and catastrophic holography

    NASA Astrophysics Data System (ADS)

    Chamblin, Andrew; Emparan, Roberto; Johnson, Clifford V.; Myers, Robert C.

    1999-09-01

    We compute the properties of a class of charged black holes in anti-de Sitter space-time, in diverse dimensions. These black holes are solutions of consistent Einstein-Maxwell truncations of gauged supergravities, which are shown to arise from the inclusion of rotation in the transverse space. We uncover rich thermodynamic phase structures for these systems, which display classic critical phenomena, including structures isomorphic to the van der Waals-Maxwell liquid-gas system. In that case, the phases are controlled by the universal ``cusp'' and ``swallowtail'' shapes familiar from catastrophe theory. All of the thermodynamics is consistent with field theory interpretations via holography, where the dual field theories can sometimes be found on the world volumes of coincident rotating branes.

  8. Three-dimensional information encryption and anticounterfeiting using digital holography.

    PubMed

    Shiu, Min-Tzung; Chew, Yang-Kun; Chan, Huang-Tian; Wong, Xin-Yu; Chang, Chi-Ching

    2015-01-01

    In this work, arbitrary micro phase-step digital holography with optical interferometry and digital image processing is utilized to obtain information about an image of a three-dimensional object and encrypting keys. Then, a computer-generated hologram is used for the purpose of holographic encryption. All information about the keys is required to perform the decryption, comprising the amplitude and phase distribution of the encrypting key, the distance of image reconstruction, zero-order term elimination, and twin-image term suppression. In addition to using identifiable information on different image planes and linear superposition processing hidden within the encrypted information, not only can we convey an important message, but we can also achieve anticounterfeiting. This approach retains the strictness of traditional holographic encryption and the convenience of digital holographic processing without image distortion. Therefore, this method provides better solutions to earlier methods for the security of the transmission of holographic information. PMID:25967026

  9. 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,

  10. 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.

  11. 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…

  12. Full-color image reconstruction by holography for 3D x-ray CT

    NASA Astrophysics Data System (ADS)

    Koike, Akifumi; Morii, Hisashi; Yomori, Mitsuhiro; Neo, Yoichiro; Aoki, Toru; Mimura, Hidenori

    2008-05-01

    The X-ray 3D CT data were detected by the CdTe semiconductor special detector which can obtain the energy information of X-ray photon, and it is developed by our laboratory. In order to display this complete 3D information with internal data of objects, the multi-color holographic reconstruction system was composed, and the reconstruction of X-ray 3D CT data were examined in this paper. In this system, the electro-holography and the computer generated holography was employed to display holographic images. In this case, we used the liquid crystal display panel as the spatial light modulator for displaying a hologram, and we developed the simulator to calculate a hologram of an X-ray 3D CT input data. Finally, it could represent effectively with three primary colors, and understand easier the internal structure of objects.

  13. Free-viewpoint images captured using phase-shifting synthetic aperture digital holography.

    PubMed

    Nakatsuji, Tatsuya; Matsushima, Kyoji

    2008-07-01

    Free-viewpoint images obtained from phase-shifting synthetic aperture digital holography are given for scenes that include multiple objects and a concave object. The synthetic aperture technique is used to enlarge the effective sensor size and to make it possible to widen the range of changing perspective in the numerical reconstruction. The lensless Fourier setup and its aliasing-free zone are used to avoid aliasing errors arising at the sensor edge and to overcome a common problem in digital holography, namely, a narrow field of view. A change of viewpoint is realized by a double numerical propagation and by clipping the wave field by a given pupil. The computational complexity for calculating an image in the given perspective from the base complex-valued image is estimated at a double fast Fourier transform. The experimental results illustrate the natural change of appearance in cases of both multiple objects and a concave object. PMID:18594569

  14. 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.

  15. Trajectory and velocity measurement of a particle in spray by digital holography

    SciTech Connect

    Lue Qieni; Chen Yiliang; Yuan Rui; Ge Baozhen; Gao Yan; Zhang Yimo

    2009-12-20

    We present a method for the trajectory and the velocity measurement of a particle in spray by digital holography. Based on multiple exposure digital in-line holography, a sequence of digital holograms of a dynamic spray particle field at different times are recorded with a CW laser and a high-speed CCD. The time evolution of the serial positions of particles, i.e., the motion trajectories of the particles, is obtained by numerically reconstructing the synthetic hologram of a sequence of digital holograms. The center coordinate (x,y) of each particle image can be extracted using a Hough transform and subpixel precision computing, and the velocity of an individual particle can also be obtained, which is then applied to measuring the velocity of diesel spray and alcohol spray. The research shows that the method presented in this paper for measuring spray field is feasible.

  16. ISSN: 2278 1323 International Journal of Advanced Research in Computer Engineering & Technology (IJARCET)

    E-print Network

    Fernandez, Thomas

    OF SOFTWARE PROJECT R Raja Ramesh Merugu1 , and Venkat Ravi Kumar Dammu2 1,2 Sri Vasavi Engineering CollegeISSN: 2278 ­ 1323 International Journal of Advanced Research in Computer Engineering & Technology;ISSN: 2278 ­ 1323 International Journal of Advanced Research in Computer Engineering & Technology

  17. THE GRAIN OF XENAKIS' TECHNOLOGICAL THOUGHT IN THE COMPUTER MUSIC RESEARCH OF OUR DAYS

    Microsoft Academic Search

    Anastasia Georgaki

    The scope of this article is to present the diachronic value of Xenakis' technological thought in computer music research and creation of our days within a comparative and critical approach. On the one hand, we will refer to the main domains of Xenakis' contributions to Music Technology: the conquest of the computer as a tool for logical transformations of symbols

  18. Wireless broadband application technology investigation of IPv6 optical network cloud computing

    Microsoft Academic Search

    Gu Cai-dong; Li Jing-Xiang; Wu Jian-ping; Fu Ying-li; Lu Kan; Si Mao-xin

    2010-01-01

    With the development of 3G network and internet technology, the rapid upgrading of internet users. It is a trend that IPv6 supersedes IPv4 and the optical network becomes more widely. Integrating a number of hotspot advanced technologies, the “wireless broadband application system for IPV6 optical network cloud computing” is a novel system with practical research importance. The cloud computing platform

  19. 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…

  20. Decision Makers Attitude towards the Computer and its effect on Web-Based Technology Adoption

    Microsoft Academic Search

    Alastair Robertson

    This paper presents research exploring the concept that many small businesses do not adopt computer based technologies due to decision maker's negative attitudes towards computers generally. Importantly, by assessing the entrepreneur's belief structure, we provide quantitative evidence how SMEs, particularly micros, are affected. Earlier research that addresses Technology Acceptance Model (TAM) suggests that TAM parameters are particularly influential factors of

  1. 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…

  2. Computer graphics around the world: graphics research at National Centre for Software Technology in India

    Microsoft Academic Search

    S. P. Mudur; S. Gopalsamy; Dinesh Shikhare; D. S. Dixit; B. S. Patwardhan; N. S. Nayak; S. V. Shanbhag

    1999-01-01

    The National Centre for Software Technology is an autonomous research and development institution of the government of India. It is a centre for excellence in software technology and related computer science areas. It carries out research in a number of disciplines such as databases and knowledge engineering, artificial intelligence, computer networking and Internet, software engineering and graphics and CAD.The graphics

  3. 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…

  4. Lithography Computer Aided Design Technology for Embedded Memory in Logic

    NASA Astrophysics Data System (ADS)

    Ohnuma, Hidetoshi; Tsudaka, Keisuke; Kawahira, Hiroichi; Nozawa, Satoru

    1998-12-01

    We have developed an optical proximity effect correction (OPC) flowfor both, the repetitive memory cell patterns by a simulation-basedmethod and for the random logic application specific IC (ASIC) patterns by a rule-based method. Application results for a 0.28 µm static random access memory(SRAM) cell and 0.25 µm ASIC devices have shown thatcorrection time and final data size were feasible for conventionallayout design flow and mask fabrication.Also, our system has achieved significant improvement with respect to patternprinting fidelity between designed and printed resist patterns.In addition to this, an automatic alternative phase shift mask (PSM)pattern layout tool has been developed. Using the tool with a double exposure method,0.16 µm gate patterns for both logic and dynamic random accessmemory (DRAM) have been obtained with a positive photoresist. The developedlithography computer aided design (CAD) technology has improved the accuracy of pattern formation forstate of the art device fabrication.The fabricated patterns have satisfied the required linewidth accuracy,within ±10% of the design value, ones under the practicalexposure-focus window.

  5. Theory and Practice with Electron Holography in a Dedicated STEM Instrument

    Microsoft Academic Search

    Shiyao Wang

    1993-01-01

    The concept of holography was first introduced by Gabor as a means for the improvement of resolution in electron microscope. Although Gabor's original scheme is equivalent to the employment of a modern STEM instrument, the study of STEM holography is considerably less developed than with CTEM holography. This dissertation is an investigation on the theory and practice with electron holography

  6. 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

  7. Enabling Technologies for Robust High-Performance Simulations in Computational Fluid Dynamics

    Microsoft Academic Search

    Christian H. Bischof; H. Martin Bucker; Arno Rasch

    \\u000a In computational science and engineering, the role of computer science includes the mechanical generation of programs for\\u000a the fast computation of accurate derivatives and the efficient utilization of parallel computer architectures. Automatic differentiation\\u000a and parallel computing are two technologies enabling robust high-performance simulations in various scientific and engineering\\u000a disciplines. This article gives a survey of selected results of an interdisciplinary

  8. 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…

  9. SPEECH TECHNOLOGY IN COMPUTER-AIDED LANGUAGE LEARNING: STRENGTHS AND LIMITATIONS OF A NEW CALL PARADIGM

    Microsoft Academic Search

    Farzad Ehsani; Eva Knodt

    1998-01-01

    We investigate the suitability of deploying speech technology in computer-based systems that can be used to teach foreign language skills. In reviewing the current state of speech recognition and speech processing technology and by examining a number of voice-interactive CALL applications, we suggest how to create robust interactive learning environments that exploit the strengths of speech technology while working around

  10. Work in progress — Designing computer technology Learning modules in a 4th grade curriculum

    Microsoft Academic Search

    Jennifer A. Polack-Wahl

    2007-01-01

    In the year 2000, the Virginia Department of Education created the Standards of Learning in Computer Technology and in the near future they plan on administrating a Standards of Learning exam to all students in 5th, 8th, and 12th grade. Nevertheless, no standard curriculum for technology exists in the Virginia Public Schools. While the technology mission for the local public

  11. 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…

  12. 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

  13. Adoption of Computer Aided Software Engineering (CASE) Technology: An Innovation Adoption Perspective

    Microsoft Academic Search

    G. Premkumar; Michael Potter

    1995-01-01

    This study examines the impact of various organizational and technology characteristics on the adoption of computer aided software engineering (CASE) technology. Based on research in innovation adoption and IS implementation, the study develops a research model comprised of seven factors that are important for the successful adoption of CASE technology. The data for the study were collected through a field

  14. Computer Technology Training in the Workplace: A Longitudinal Investigation of the Effect of Mood

    Microsoft Academic Search

    Viswanath Venkatesh; Cheri Speier

    1999-01-01

    How does a person's mood during technology training influence motivation, intentions, and, ultimately, usage of the new technology? Do these mood effects dissipate or are they sustainable over time? A repeated-measures field study (n = 316) investigated the effect of mood on employee motivation and intentions toward using a specific computer technology at two points in time: immediately after training

  15. 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.

  16. University ESL Instructors' Perceptions and Use of Computer Technology in Teaching

    Microsoft Academic Search

    Lili Bruess

    2003-01-01

    This interpretive qualitative study examined university ESL instructors' experiences using technologies and their personal views of technology integration. The study also explored the factors that affected these instructors' decisions for using computer and other technologies in their teaching. The informants in the study were five ESL instructors from five different institutions of higher learning in the southern state. The qualitative

  17. Summary of researches being performed in the Institute of Mathematics and Computer Science on computer science and information technologies

    Microsoft Academic Search

    Artiom Alhazov; Elena Boian; Liudmila Burtseva; Constantin Ciubotaru; Svetlana Cojocaru; Alexander Colesnicov; Constantin Gaindric; Galina Magariu; Iurie Rogojin; Tatiana Verlan

    2008-01-01

    Evolution of the informatization notion (which assumes automa- tion of majority of human activities applying computers, computer networks, information technologies) towards the notion of Global Infor- mation Society (GIS) challenges the determination of new paradigms of society: automation and intellectualization of production, new level of education and teaching, formation of new styles of work, active par- ticipation in decision making,

  18. Influence of Gender and Computer Teaching Efficacy on Computer Acceptance among Malaysian Student Teachers: An Extended Technology Acceptance Model

    ERIC Educational Resources Information Center

    Wong, Kung-Teck; Teo, Timothy; Russo, Sharon

    2012-01-01

    The purpose of this study is to validate the technology acceptance model (TAM) in an educational context and explore the role of gender and computer teaching efficacy as external variables. From the literature, it appeared that only limited studies had developed models to explain statistically the chain of influence of computer teaching efficacy…

  19. 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…

  20. The application of computer-aided technologies in automotive styling design

    NASA Astrophysics Data System (ADS)

    Zheng, Ze-feng; Zhang, Ji; Zheng, Ying

    2012-04-01

    In automotive industry, outline design is its life and creative design is its soul indeed. Computer-aided technology has been widely used in the automotive industry and more and more attention has been paid. This paper chiefly introduce the application of computer-aided technologies including CAD, CAM and CAE, analyses the process of automotive structural design and describe the development tendency of computer-aided design.

  1. 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…

  2. Imaging nanoparticles in cells by nanomechanical holography

    SciTech Connect

    Tetard, Laurene [ORNL; Passian, Ali [ORNL; Venmar, Katherine T [ORNL; Lynch, Rachel M [ORNL; Voy, Brynn H [ORNL; Shekhawat, Gajendra [Northwestern University, Evanston; Dravid, Vinayak [Northwestern University, Evanston; Thundat, Thomas George [ORNL

    2008-06-01

    Nanomaterials have potential medical applications, for example in the area of drug delivery, and their possible adverse effects and cytotoxicity are curently receiving attention1,2. Inhalation of nanoparticles is of great concern, because nanoparticles can be easily aerosolized. Imaging techniques that can visualize local populations of nanoparticles at nanometre resolution within the structures of cells are therefore important3. Here we show that cells obtained from mice exposed to single-walled carbon nanohorns can be probed using a scanning probe microscopy technique called scanning near field ultrasonic holography. The nanohorns were observed inside the cells, and this was further confirmed using micro Raman spectroscopy. Scanning near field ultrasonic holography is a useful technique for probing the interactions of engineered nanomaterials in biological systems, which will greatly benefit areas in drug delivery and nanotoxicology.

  3. Massively parallel X-ray holography

    NASA Astrophysics Data System (ADS)

    Marchesini, Stefano; Boutet, Sébastien; Sakdinawat, Anne E.; Bogan, Michael J.; Bajt, Saša; Barty, Anton; Chapman, Henry N.; Frank, Matthias; Hau-Riege, Stefan P.; Szöke, Abraham; Cui, Congwu; Shapiro, David A.; Howells, Malcolm R.; Spence, John C. H.; Shaevitz, Joshua W.; Lee, Joanna Y.; Hajdu, Janos; Seibert, Marvin M.

    2008-09-01

    Advances in the development of free-electron lasers offer the realistic prospect of nanoscale imaging on the timescale of atomic motions. We identify X-ray Fourier-transform holography as a promising but, so far, inefficient scheme to do this. We show that a uniformly redundant array placed next to the sample, multiplies the efficiency of X-ray Fourier transform holography by more than three orders of magnitude, approaching that of a perfect lens, and provides holographic images with both amplitude- and phase-contrast information. The experiments reported here demonstrate this concept by imaging a nano-fabricated object at a synchrotron source, and a bacterial cell with a soft-X-ray free-electron laser, where illumination by a single 15-fs pulse was successfully used in producing the holographic image. As X-ray lasers move to shorter wavelengths we expect to obtain higher spatial resolution ultrafast movies of transient states of matter.

  4. Industrial Holography Combined With Image Processing

    NASA Astrophysics Data System (ADS)

    Schorner, J.; Rottenkolber, H.; Roid, W.; Hinsch, K.

    1988-01-01

    Holographic test methods have gained to become a valuable tool for the engineer in research and development. But also in the field of non-destructive quality control holographic test equipment is now accepted for tests within the production line. The producer of aircraft tyres e. g. are using holographic tests to prove the guarantee of their tyres. Together with image processing the whole test cycle is automatisized. The defects within the tyre are found automatically and are listed on an outprint. The power engine industry is using holographic vibration tests for the optimization of their constructions. In the plastics industry tanks, wheels, seats and fans are tested holographically to find the optimum of shape. The automotive industry makes holography a tool for noise reduction. Instant holography and image processing techniques for quantitative analysis have led to an economic application of holographic test methods. New developments of holographic units in combination with image processing are presented.

  5. Hardware Technology for Computers in Education: One of the Soluble Problems.

    ERIC Educational Resources Information Center

    Seidel, R. J.

    The state-of-the-art of hardware technology for computers in education is discussed. The choices that are available to the user, and the questions the user must ask himself before making a choice of computer hardware, are explored. An example of the costs of a central computer system for educational use is presented. (Author)

  6. 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…

  7. Advanced Adoption of Computer Technology in the Classroom and Teachers' Participation in Voluntary Innovation Adoption Activities.

    ERIC Educational Resources Information Center

    Wesley, Marion T., Jr.; Franks, Melvin Eugene

    A case study was conducted to seek improved understanding of processes related to teachers' adoption of two classroom-based computer technologies--networked computer-assisted instruction (CAI) and desktop computer multimedia resources--at a selected magnet elementary school. A Stages of Concern Questionnaire was used to gather quantitative data,…

  8. Using HP Mobile Technology to Support a Human-Computer Interaction Design Studio*

    E-print Network

    Hundhausen, Chris

    Using HP Mobile Technology to Support a Human-Computer Interaction Design Studio* Christopher to teaching an undergraduate course on human-computer interaction design. In addition to a weekly lecture it addresses the fundamental problem of how to actively engage students of human-computer interaction

  9. Developments in the Location, Technology and Industrial Organization of Computer Services: Some Trends and Research Issues

    Microsoft Academic Search

    Jeremy Howells

    1987-01-01

    HOWELLS J. (1987) Developments in the location, technology and industrial organization of computer services: some trends and research issues, Reg. Studies21, 493–503. Computer services are growing rapidly in mature industrial economics. Turnover is expanding quickly, new firm formation rates are high and employment growth is continuing to expand. In spatial terms, computer services in the UK remain concentrated in the

  10. Understanding Pre-Service Teachers' Computer Attitudes: Applying and Extending the Technology Acceptance Model

    ERIC Educational Resources Information Center

    Teo, T.; Lee, C. B.; Chai, C. S.

    2008-01-01

    Computers are increasingly widespread, influencing many aspects of our social and work lives. As we move into a technology-based society, it is important that classroom experiences with computers are made available for all students. The purpose of this study is to examine pre-service teachers' attitudes towards computers. This study extends the…

  11. 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…

  12. National Institute of Standards and Technology (NIST) Cloud Computing Forum & Workshop Agenda

    E-print Network

    National Institute of Standards and Technology (NIST) Cloud Computing Forum & Workshop Agenda U: Director, NIST, Dr. Patrick Gallagher Overview of NIST mission and role in the context of Cloud Computing 9 government with respect to Cloud Computing 10:00 Break (main lobby) 10:20 Industry Panel: co-chairs William

  13. Basic research and 12 years of clinical experience in computer-assisted navigation technology: a review

    Microsoft Academic Search

    R. Ewers; K. Schicho; G. Undt; F. Wanschitz; M. Truppe; R. Seemann; A. Wagner

    2005-01-01

    Computer-aided surgical navigation technology is commonly used in craniomaxillofacial surgery. It offers substantial improvement regarding esthetic and functional aspects in a range of surgical procedures. Based on augmented reality principles, where the real operative site is merged with computer generated graphic information, computer-aided navigation systems were employed, among other procedures, in dental implantology, arthroscopy of the temporomandibular joint, osteotomies, distraction

  14. --------Original Message --------Subject: [robo-ms] Fwd: [Imageworld] C3 Technologies: Computer Vision Specialists

    E-print Network

    Plotkin, Joshua B.

    : Computer Vision Specialists and C/C++ Programmers To: "imageworld@diku.dk" C3 Technologies is recruiting computer vision specialists and C/C++ programmers to the R&D department at our office in Linköping, Sweden. C3 uses computer vision methods to automatically generate 3D models from

  15. Roadmap: Technical and Applied Studies Computer Technology General Bachelor of Technical and Applied Studies

    E-print Network

    Sheridan, Scott

    Survey of Information Security, Internet Fraud and Computer Forensics 3 C May fulfill writingRoadmap: Technical and Applied Studies ­ Computer Technology General ­ Bachelor of Technical 11000 Introduction to Computer Systems (3) or COMT 12000 Personal Productivity Software (3) or MIS 24053

  16. Simple and robust digital holography for phase imaging of microstructure

    Microsoft Academic Search

    Xiufa Song; Zhiwei Tang; Huaying Wang

    2009-01-01

    Digital holography is particularly well suited for characterization of microstructure such as surface shape, surface nanostructures and surface roughness. The wavefront recording and reconstruction with lensless Fourier transform digital holography is analyzed. By using a special 3-D minute object, the simulation and experimental investigation is performed. The accurate intensity and phase image is obtained with the lateral resolution of 2.76

  17. Reconstruction Method of Wavefronts in Digital MicroHolography

    Microsoft Academic Search

    Baoqun Zhao; Wei Liao; Huaying Wang

    2009-01-01

    The recording and reconstruction for off-axis lensless Fourier digital hologram is analyzed. The phase reconstruction method based on the digital lateral shearing interferometry and digital holography has been discussed and demonstrated. The results show that the phase image of microstructure object can be obtained by combining the digital holography with lateral shearing interferometry. Based on the idea of automatic phase

  18. Simple and Robust Digital Holography Used for Phase Imaging

    Microsoft Academic Search

    Jingbo Liu; Xiufa Song; Min Huang; Huaying Wang

    2008-01-01

    Digital holography is a digitized holography, which is very suitable for phase imaging of microscopic object. An off-axis lensless Fourier transform digital holographic system is built. The recording and numerical reconstruction of digital hologram is analyzed. The model of phase aberration in numerical reconstruction is presented. Experimental investigations have been performed for a USAF test target. The accurate phase image

  19. 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

  20. Guest Editoria Holography A Dedication To Dennis Gabor

    NASA Astrophysics Data System (ADS)

    Wyant, James C.; Chen, Chungte T.; Reynolds, George O.

    1980-10-01

    We thought it was time to bring the readers of Optical Engineering up to date on the new developments in holography, as was done exactly five years ago with the September/October 1975 special issue. The seeds for this special issue were sown during the 1978 Gordon Conference on Coherent Optics and Holography held at the Miramar Hotel in Santa Barbara, California. The conference clearly demonstrated, through the discussion of many interesting research and development applications, that holography is alive and well. For example, artists have discovered holography as a new medium and there is a museum for displaying new holographic developments and inventions. In addition to the opening of the New York museum where artists and patrons are thoroughly enjoying holography, the past five years have witnessed the publication of the Handbook of Optical Holography, continuing issues of the Acoustical Holography proceedings, the gathering of scientists to exchange ideas at three Gordon Conferences in 1976, 1978, and 1980, and the SPIE conference on holography held in Los Angeles in February 1980.

  1. Color holography: a new technique for reproduction of paintings

    Microsoft Academic Search

    Hans I. Bjelkhagen; Dalibor Vukicevic

    2002-01-01

    Until recently, display holography was usually associate with 3D imaging. After the appearance of color holography it has become possible, however, to record holographic images of 2D objects, such as, for example, oil paintings. The realistic-looking virtual image recorded in a Denisyuk reflection hologram is the most suitable for such reproductions. A holographic contact recording of a painting reproduces the

  2. 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.

  3. Tailoring ultrasonic beams with optoacoustic holography

    Microsoft Academic Search

    Alex Meyer; Stefan J. Gspan; Stefan Bernet; Monika Ritsch-Marte

    2003-01-01

    A combination of laser-induced ultrasound generation and ultrasonic holography for spatial control of the generated ultrasonic pulse is presented. Ultrasound is produced by absorption of laser pulses at an absorbing layer in a water tank via the optoacoustic effect. In order to produce a defined ultrasonic frequency in the MHz range, the laser pulses are harmonically time-modulated using an acousto-optic

  4. Extreme-ultraviolet lensless Fouriertransform holography

    Microsoft Academic Search

    Sang Hun Lee; Patrick P. Naulleau; Kenneth A. Goldberg; Chang Hyun Cho; Seong Tae Jeong; Jeffrey Bokor

    2001-01-01

    We demonstrate 100-nm-resolution holographic aerial image monitoring based on lensless Fourier- transform holography at extreme-UV ~EUV! wavelengths, using synchrotron-based illumination. This method can be used to monitor the coherent imaging performance of EUV lithographic optical systems. The system has been implemented in the EUV phase-shifting point-diffraction interferometer recently developed at Lawrence Berkeley National Laboratory. Here we introduce the idea of

  5. Quantitative phase microscopy with asynchronous digital holography

    PubMed Central

    Brown, William J.; Wax, Adam

    2009-01-01

    We demonstrate a new method of measuring quantitative phase in imaging of biological materials. This method, asynchronous digital holography, employs knowledge of a moving fringe created by acousto-optic modulators to execute phase-shifting interferometry using two near-simultaneous interferograms. The method can be used to obtain quantitative phase images of dynamic biological samples on millisecond time scales. We present results on a standard sample, and on live cell samples. PMID:19532543

  6. Nonrelativistic holography and singular black hole

    Microsoft Academic Search

    Feng-Li Lin; Shang-Yu Wu

    2009-01-01

    We provide a framework for non-relativistic holography so that a covariant action principle ensuring the Galilean symmetry for dual conformal field theory is given. This framework is based on the Bargmann lift of the Newton–Cartan gravity to the one-dimensional higher Einstein gravity, or reversely, the null-like Kaluza–Klein reduction. We reproduce the previous zero temperature results, and our framework provides a

  7. Research of the automatic imaging focusing measurement for off-axis Fresnel digital holography

    NASA Astrophysics Data System (ADS)

    Yu, Xun; Nie, Liang; Wang, Fang; Jiang, Xu

    2008-09-01

    Digital holography technology, which adopt CCD digital camera to record holograph, can get amplitude and phase information of the sample tested respectively through processing the image. Re-focus of the sample image can be realized by calculating complex amplitude information obtained. However, digital holograph reproduction system can't offer any criterion which determine whether reproduction image achieve fixed-focus state when reproduction image stands in the optimum position. Digital holography reproduction process need add an exterior criterion function, which implement automatic focus as normal imaging system. Aimed to digital imaging automatic focusing problem of off-axis Fresnel holography, image gradient energy method, image Laplace energy method, image shade of gray variance method are compared from two points of theory and practice view, and present the advanced measurement method based on spectrum band-stop filter. Experiment shows that the algorithm has some adaptability, especially image Laplace energy method based on spectrum band-stop filter has non-skewness, monotonicity, unimodality, kurtosis and robust.

  8. Non-invasive monitoring for living cell culture with lensless Fourier transform digital holography microscopy

    NASA Astrophysics Data System (ADS)

    Wang, Yunxin; Wang, Dayong; Zhao, Jie; Li, Yan; Meng, Puhui; Wan, Yuhong; Jiang, Zhuqing

    2010-08-01

    The number of cells is commonly employed to describe the cell viability and the status of cell culture in a certain extent. An automatic and non-invasive detecting method for the status analysis of cell culture is developed based on digital holography microscopy (DHM) technology. Digital holographic imaging can retrieve quantitative information of object wavefront by the numerical reconstruction from a single digital hologram recorded by a detector such as CCD or CMOS camera, which is especially suitable for the morphology detection of the transparent or semi-transparent cells. In this contribution, the lensless Fourier transform (LFT) based holography configuration is designed for cell imaging without prestaining, and the amplitude and phase of living cells can be reconstructed by digital reconstruction and phase unwrapped algorithms. Then the image filtering and segmentation are combined for the automatic evaluation of the level of confluency. In imaging experiments, the culture status of the cervical cancer cell TZMbl is detected, and the results demonstrate that digital holography microscopy provides a feasible non-invasive method for monitoring the living cell culture.

  9. 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.

  10. Department of Computer science Technion--Israel Institute of Technology

    E-print Network

    Friedman, Roy

    Distributed and Parallel Systems Hardware Communication and Systems Programming Languages Software and Hardware Verification Software Engineering Artificial Intelligence Learning Reasoning 5 #12;Intelligent Bioinformatics (Computer Science and Biology Computational Linguistics and Natural Language Processing Quantum

  11. Department of Computer science Technion--Israel Institute of Technology

    E-print Network

    Schuster, Assaf

    Programming languages Operating Systems & Virtualization Software & Hardware verification Software Engineering Science and Biology) Computational Linguistics and Natural Language Processing Quantum Information Processing (Computer Science, Electrical Engineering, Physics and Chemistry) World Wide Web, Electronic

  12. 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.

  13. Coherent fiber combining by digital holography

    NASA Astrophysics Data System (ADS)

    Bellanger, C.; Brignon, A.; Colineau, J.; Huignard, J. P.

    2009-02-01

    Fiber lasers provide an attractive means of reaching high output laser power because of their advantages in terms of compactness, reliability, efficiency and beam quality. In order to obtain much higher output power than it is possible from a single fiber, beam-combining techniques have been investigated. In this communication, we present a new technique of coherent fiber combining, based on self adaptive digital holography that does not require any phase error measurement. A low power plane reference beam is first launched into the fiber amplifier array. The interference pattern between the beams with phase ?(x,y) issued from the fiber array and a plane reference beam is recorded on a digital camera and directly transferred to a Spatial Light Modulator (SLM) which acts as a programmable digital hologram. This hologram is read out simultaneously and a phase conjugate beam with phase -?(x,y) is generated in order -1 of the diffraction pattern. This beam is then injected in the fiber amplifier array. At the output of the fiber amplifier array, the phase of each elementary beam are locked. Experimental demonstration of coherent beam combining by digital holography is demonstrated with polarization maintaining fibers operating at 1 ?m. Digital holography is realized thanks to a CCD/CMOS camera and a liquid crystal SLM. Owing to the high resolution of existing SLMs and cameras, this technique could be applied to phase lock a large number of fiber amplifiers.

  14. Electron holography of devices with epitaxial layers

    NASA Astrophysics Data System (ADS)

    Gribelyuk, M. A.; Ontalus, V.; Baumann, F. H.; Zhu, Z.; Holt, J. R.

    2014-11-01

    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 V0 = 12.75 V of the intrinsic epitaxial SiGe was measured by electron holography in devices with Ge content CGe = 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.

  15. 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.

  16. Non-Relativistic Holography from Horava Gravity

    NASA Astrophysics Data System (ADS)

    Janiszewski, Stefan

    Holography is a powerful theoretical duality that relates quantum gravitational theories to non-gravitational theories in one less dimension. The most explored example of this tool is the correspondence between general relativity on five dimensional Anti-de Sitter space and a four dimensional supersymmetric Yang-Mills theory. This case is extremely useful as the strong coupling regime of the Yang-Mills theory is solved by weakly coupled gravity. Another interesting class of strongly coupled field theories are those of a non-relativistic nature that arise in condensed matter systems. Herein, motivated by the generic symmetry structure of these theories, a non-relativistic version of holography is proposed using an alternate theory of gravity, Horava gravity. Justifications of this proposal are thoroughly discussed. Various checks of the duality, such as correlation functions and black hole thermodynamics are presented. This new holographic correspondence provides a crucial tool to tackle strongly coupled problems in condensed matter systems. On the other hand, Horava gravity, thought to be a UV complete theory of quantum gravity, will allow holography to move away from the strong coupling, large number of colors limit that has restricted traditional AdS/CFT.

  17. 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.

  18. 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.

  19. Computer Literacy in an Academic Library: Technological Hit or Myth?

    ERIC Educational Resources Information Center

    Hanson, Charles D.

    1984-01-01

    Traces the development of Lima Community College's computer literacy program, which uses the library as the site of ongoing computer education. Explores such factors in program development as funding, hardware choice, and implementation steps. Responds to several myths about computers, e.g., microcomputers take up little space and reduce staffing…

  20. Using the computer as a tool in engineering technology programs

    Microsoft Academic Search

    Kathleen L. Kitto

    1994-01-01

    Computers are becoming increasingly important tools in engineering as the pressure to produce world class products in the United States expands. Computers are revolutionizing the way engineers “do” engineering. Concepts such as concurrent engineering, solids modeling, design for manufacturability and assembly, statistical process control, total quality management, injection molding simulation and finite element analysis all use the computer to assist

  1. 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…

  2. Computers and Satellites: Effective New Technologies for Distance Education.

    ERIC Educational Resources Information Center

    Milheim, William D.

    1989-01-01

    Describes the use of computers and satellites for delivering educational materials to distance learners. Topics discussed include teletex; videotex; telecommunications; computer use in the design and production of instructional materials; administrative uses of computers; satellite programing; and future possibilities. Examples of distance…

  3. Intelligent computing technologies in music processing for blind people

    Microsoft Academic Search

    Wladyslaw Homenda

    2010-01-01

    A discussion on involvement of knowledge based methods in implementation of user friendly computer programs for disabled people is the goal of this paper. The paper presents a concept of a computer program that is aimed to aid blind people dealing with music and music notation. The concept is solely based on computational intelligence methods involved in implementation of the

  4. The implementation of AI technologies in computer wargames

    Microsoft Academic Search

    John A. Tiller

    2004-01-01

    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

  5. Reconfiguring Basic Computer Occupations: Between Technology and Service.

    ERIC Educational Resources Information Center

    Liaroutzos, Oliver; Robichon, Marc

    2000-01-01

    The nature of basic computer occupations has changed greatly since the early 1980s. The changes reveal a shift in the respective roles of the sectors of industry associated with computer services (manufacturing and industrial computing). The service sector has adopted the procedures of industry in terms of organization, methods, and quality,…

  6. 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…

  7. 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…

  8. Security enhanced optical one-time password authentication method by using digital holography

    NASA Astrophysics Data System (ADS)

    Gil, Sang Keun; Jeon, Seok Hee; Jeong, Jong Rae

    2015-03-01

    We propose a new optical one-time password(OTP) authentication method by using digital holography, which enhances security strength in the cryptosystem compared to the conventional electronic OTP method. In this paper, a challenge-response optical OTP authentication based on two-factor authentication is presented by 2-step quadrature phase-shifting digital holography using orthogonal polarization, and two-way authentication is also performed using the challenge-response handshake in both directions. The ID (identification), PW (password) and OTP information are encrypted with a shared key by applying phase-shifting digital holography, and these encrypted information are verified each other by the shared key. Because the encrypted digital holograms which are transmitted to the other party are expressed as random distribution, it guards against a replay attack and results in higher security level. Optically, encrypted digital hologram in our method is Fourier transform hologram and is recorded on CCD with 256 gray-level quantized intensities. The proposed method has an advantage that it does not need a time-synchronized OTP and can be applied to various security services. Computer experiments show that the proposed method is suitable for high secure OTP authentication.

  9. 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.

  10. 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.

  11. Exploring Secondary Agriscience Teachers' and Students' Use, Attitude Toward, Knowledge and Perceptions of Computers and Technology Tools 

    E-print Network

    Miller, Kimberley Ann

    2012-07-16

    Computers are an ever changing facet of everyday life; almost all businesses, including schools, are dependent on technology, from research to information delivery. With the rapid advances in computer technology made every ...

  12. 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.

  13. "Over the past few decades,electronic computer technology has made enormous strides.Moreover, there can be little doubt that in the decades to follow, there will be further great advances in speed,

    E-print Network

    Seldin, Jonathan P.

    "Over the past few decades,electronic computer technology has made enormous strides College Computer Systems Technology Keyano College Computer Information Systems Lakeland College Computer Systems Technology Lethbridge Community College Computer Information Technology Medicine Hat College

  14. "Over the past few decades,electronic computer technology has made enormous strides.Moreover, there can be little doubt that in the decades to follow, there will be further great advances in speed,

    E-print Network

    Seldin, Jonathan P.

    "Over the past few decades,electronic computer technology has made enormous strides Technology Keyano College Computer Information Systems Lethbridge Community College Computer Information Technology Medicine Hat College Computer Systems Technology Mount Royal College Computer Information Systems

  15. "Over the past few decades,electronic computer technology has made enormous strides.Moreover, there can be little doubt that in the decades to follow, there will be further great advances in speed,

    E-print Network

    Seldin, Jonathan P.

    "Over the past few decades,electronic computer technology has made enormous strides Regional College Computer Systems Technology Keyano College Computer Information Systems Lethbridge Community College Computer Information Technology Medicine Hat College Computer Systems Technology Mount

  16. ID-No. of presentation: t3a01391 Authors: Christos Bouras, Computer Technology Institute, Patras, Greece

    E-print Network

    Bouras, Christos

    , Greece Apostolos Gkamas, Computer Technology Institute, Patras, Greece Vaggelis Kapoulas, Computer Technology Institute, Patras, Greece Thrasyvoulos Tsiatsos, Computer Technology Institute, Patras, Greece ODL for the enterprises. In Greece the main PTT organisation, as part of its strategy to offer integrated telematics

  17. 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's computing resources, information technologies, and networks are responsible for using those resources in accordance with the law and with WSU policy. Use of WSU computing, information technologies, and networking

  18. Computing Science and The eLearning Paradigm Technology Focus or Goal? Marie Devlin, Chris Phillips, Lindsay Marshall

    E-print Network

    Newcastle upon Tyne, University of

    Computing Science and The eLearning Paradigm ­ Technology Focus or Goal? Marie Devlin, Chris.marshall@ncl.ac.uk Abstract: Today's prospective entrants to Computing Science degrees have grown up surrounded by technology to technology and eLearning provision in Computing Science at tertiary level. In this paper, we describe our

  19. First 2 years of the degree at NUST Degree at ANU Duration at ANU Requirements Computer Science & Technology

    E-print Network

    Zhou, Xiangyun "Sean"

    Duration at ANU Requirements Computer Science & Technology Network Engineering Software Engineering First 2.5 years of the degree at NUST Degree at ANU Duration at ANU Requirements Computer Science & Technology of Computer Science & Technology Bachelor of Network Engineering Bachelor of Software Engineering Completion

  20. International Journal of Computer science & Information Technology (IJCSIT), Vol 1, No 2, November 2009 Analysis of Telecommunication Management

    E-print Network

    Paris-Sud XI, Université de

    International Journal of Computer science & Information Technology (IJCSIT), Vol 1, No 2, November manuscript, published in "International journal of computer science & information technology (IJCSIT) 1, 2 (2009) 152-166" #12;International Journal of Computer science & Information Technology (IJCSIT), Vol 1

  1. eUROPEAN nETWORK for aDVANCED cOMPUTING tECHNOLOGY for sCIENCE

    E-print Network

    Farantos, Stavros C.

    eUROPEAN nETWORK for aDVANCED cOMPUTING tECHNOLOGY for sCIENCE DISSEMINATION REPORT Compiled ­ computational Grids, data Grids and data management, collaborative Grids, Grid enabling technologies, software to foresee the future implications of the rapidly advancing Grid technology in computational sciences

  2. Description & Careers Nearly all organizations rely on computer and information technology (IT) to conduct business and to operate efficiently.

    E-print Network

    technology (IT) to conduct business and to operate efficiently. Computer systems analysts work with specific and Internet technology. Prospective students should have an aptitude for computers and quantitatively oriented) with a concentration in information systems. Technological advances come so rapidly in the computer field

  3. Review of parallel computing methods and tools for FPGA technology

    NASA Astrophysics Data System (ADS)

    Cieszewski, Rados?aw; Linczuk, Maciej; Pozniak, Krzysztof; Romaniuk, Ryszard

    2013-10-01

    Parallel computing is emerging as an important area of research in computer architectures and software systems. Many algorithms can be greatly accelerated using parallel computing techniques. Specialized parallel computer architectures are used for accelerating speci c tasks. High-Energy Physics Experiments measuring systems often use FPGAs for ne-grained computation. FPGA combines many bene ts of both software and ASIC implementations. Like software, the mapped circuit is exible, and can be recon gured over the lifetime of the system. FPGAs therefore have the potential to achieve far greater performance than software as a result of bypassing the fetch-decode-execute operations of traditional processors, and possibly exploiting a greater level of parallelism. Creating parallel programs implemented in FPGAs is not trivial. This paper presents existing methods and tools for ne-grained computation implemented in FPGA using Behavioral Description and High Level Programming Languages.

  4. The innovation dynamics and technology cycles in the computer industry

    Microsoft Academic Search

    Devendra Sahal

    1984-01-01

    This paper presents certain novel composite measures of technology. There are several important uses of the proposed measures in R & D management: to gauge the rate of innovation within any given field, to determine the relative contribution of chosen variables to technical progress, to isolate critical factors in the innovative activity, and to predict whether a technology is ahead

  5. 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…

  6. Computer aided manufacturing process planning by Group Technology application

    Microsoft Academic Search

    V. Fecova; J. Novak-Marcincin; M. Janak; J. Barna; L. Novakova-Marcincinova

    2011-01-01

    The program for machine is important for creation a new parts in industry. In this time, the NC (numerical control) is very used. NC is technology, in which the program for controlling of the machine is used; for example for drilling, lathes, milling, conventional and unconventional cutting machines (laser, water-jet, plasma). CNC programming may use the application of Group Technology

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

    E-print Network

    California at Berkeley, University of

    & COMMUNICATIONS Volume 13, Number 1 Winter 2003 IN THIS ISSUE: Web-enabled PowerPoint--5 SAN bulk storage--9 i. At the core of UC Berkeley's information technology infrastructure is its communi- cations network Systems and Technology Winter 2003 / Volume 13, Number 1 University of California, Berkeley Senior Editor

  8. 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,…

  9. Critical Engagement with Technology in the Computer Classroom.

    ERIC Educational Resources Information Center

    Salvo, Michael J.

    2002-01-01

    Proposes a model for critically engaging technology in technical communication graduate curricula. Suggests that technical communicators have an ethical as well as intellectual responsibility to engage the interface between technology and culture. Describes one example, a graduate class in information architecture, as a model for engaging the…

  10. DEFACTO: A Design Environment for Adaptive Computing Technology

    Microsoft Academic Search

    Kiran Bondalapatit; Pedro C. Diniz; Phillip Duncanw; John J. Granacki; Mary W. Hall; Rajeev JainS; Heidi E. Ziegler

    1999-01-01

    The lack of high-level design tools hampers the widespread adoption of adaptive computing systems. Application developers have to master a wide range of functions, from the high-level architecture design, to the timing of actual control and data signals. These systems are extremely cumbersome and error-prone, making it difficult for adaptive computing to enter mainstream computing. In this paper we describe

  11. Autonomic computing technologies for cyber-physical systems

    Microsoft Academic Search

    Ingeol Chun; Wontae Kim; Woochun Kang; Haeyoung Lee

    2010-01-01

    Cyber-physical systems (CPS) are characterized by extremely tight integration of and coordination between computational and physical resources. Embedded computers and networks in the cyber world monitor and control the physical world. But it is impossible to make systems suitable to all situations because the physical world has much uncertainty and uncontrollable condition. The interactive mechanism between the cyber world and

  12. Technology in practice – GP computer use by age.

    PubMed

    Henderson, Joan; Pollack, Allan; Gordon, Julie; Miller, Graeme

    2014-12-01

    Since 2005, more than 95% of general practitioners (GPs) have had access to computers in their clinical work. We have analysed the most recent 2 years of BEACH data (April 2012-March 2014) to determine whether GP age affects clinical computer use. PMID:25705729

  13. 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…

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

    E-print Network

    Bukkapatnam, Satish T.S.

    and Analysis (Chatter Example) Midterm 1 6 Sensing and DAQ fundamentals (in class session) LabView Interface LabView tutorial 7 Process Characterization and Modeling - Introduction DAQ Lab Article 4 (week 7) 8 Computer Modeling of Process Dynamics Process Simulations Article 3 (week 4) 5 Computer Modeling

  15. 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

  16. Towards a 'siliconeural computer': technological successes and challenges.

    PubMed

    Hughes, Mark A; Shipston, Mike J; Murray, Alan F

    2015-07-28

    Electronic signals govern the function of both nervous systems and computers, albeit in different ways. As such, hybridizing both systems to create an iono-electric brain-computer interface is a realistic goal; and one that promises exciting advances in both heterotic computing and neuroprosthetics capable of circumventing devastating neuropathology. 'Neural networks' were, in the 1980s, viewed naively as a potential panacea for all computational problems that did not fit well with conventional computing. The field bifurcated during the 1990s into a highly successful and much more realistic machine learning community and an equally pragmatic, biologically oriented 'neuromorphic computing' community. Algorithms found in nature that use the non-synchronous, spiking nature of neuronal signals have been found to be (i) implementable efficiently in silicon and (ii) computationally useful. As a result, interest has grown in techniques that could create mixed 'siliconeural' computers. Here, we discuss potential approaches and focus on one particular platform using parylene-patterned silicon dioxide. PMID:26078350

  17. A FRAMEWORK FOR H-ANIM SUPPORT IN NVES Research Academic Computer Technology Institute (CTI), Greece and

    E-print Network

    Bouras, Christos

    (CTI), Greece and Computer Engineering and Informatics Department (CEID), University of Patras, Greece, Greece chatzipr@ceid.upatras.gr V. Triglianos Research Academic Computer Technology Institute (CTI), Greece and Computer Engineering and Informatics Departmet (CEID) University of Patras, Greece triglian

  18. Computer-Aided Analysis of Patents for Product Technology Maturity Forecasting

    NASA Astrophysics Data System (ADS)

    Liang, Yanhong; Gan, Dequan; Guo, Yingchun; Zhang, Peng

    Product technology maturity foresting is vital for any enterprises to hold the chance for innovation and keep competitive for a long term. The Theory of Invention Problem Solving (TRIZ) is acknowledged both as a systematic methodology for innovation and a powerful tool for technology forecasting. Based on TRIZ, the state -of-the-art on the technology maturity of product and the limits of application are discussed. With the application of text mining and patent analysis technologies, this paper proposes a computer-aided approach for product technology maturity forecasting. It can overcome the shortcomings of the current methods.

  19. MASSACHUSETTS INSTITUTE of TECHNOLOGY Department of Electrical Engineering and Computer Science

    E-print Network

    Goldwasser, Shafi

    .161 Modern Optics Project Laboratory 6.637 Optical Signals, Devices & Systems Problem Set No. 5 Holography with the aid of diagrams how you would make a color RGB (red, green, blue) hologram that could be read out a thick white light reflection hologram using the recording setup shown below. Assume the reference beam

  20. A Survey of Computer Use in Associate Degree Programs in Engineering Technology.

    ERIC Educational Resources Information Center

    Cunningham, Pearley

    As part of its annual program review process, the Department of Engineering Technology at the Community College of Allegheny County, in Pennsylvania, conducted a study of computer usage in community college engineering technology programs across the nation. Specifically, the study sought to determine the types of software, Internet access, average…

  1. 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…

  2. 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…

  3. CSULB LIBRARY AND ACADEMIC TECHNOLOGY SERVICES COMPUTER USE AND ACCESS STATEMENT

    E-print Network

    Sorin, Eric J.

    CSULB LIBRARY AND ACADEMIC TECHNOLOGY SERVICES COMPUTER USE AND ACCESS STATEMENT 2007 In pursuit of teaching, research, and scholarly/creative production, CSULB Library and Academic Technology Services. Users must be prepared to show appropriate ID2 as requested by LATS personnel or University Police

  4. Candidate technologies and design concepts for Comanche Mission Computer Cluster (MCC) production

    Microsoft Academic Search

    T. A. DuBois; J. J. Clevenger; T. L. Hill

    2001-01-01

    Rapid advances in computer and electronics technologies has created the situation in which all aviation platforms need to contend with varying degrees of parts obsolescence. Having just entered an Engineering Manufacturing Development (EMD) phase with production in 2006, the Comanche program recognizes the challenges of parts obsolescence and is considering the introduction of selected emerging technologies to proactively address this

  5. 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

  6. Science-Technology Coupling: The Case of Mathematical Logic and Computer Science.

    ERIC Educational Resources Information Center

    Wagner-Dobler, Roland

    1997-01-01

    In the history of science, there have often been periods of sudden rapprochements between pure science and technology-oriented branches of science. Mathematical logic as pure science and computer science as technology-oriented science have experienced such a rapprochement, which is studied in this article in a bibliometric manner. (Author)

  7. Thinking Critically about Technological Literacy: Developing a Framework To Guide Computer Pedagogy in Technical Communication.

    ERIC Educational Resources Information Center

    Breuch, Lee-Ann Kastman

    2002-01-01

    Considers how issues related to technological literacy can provide a useful frame for thinking critically about computer-based instruction in technical communication. Identifies issues of technological literacy related to performance, contextual factors, and linguistic activities in order for students to identify and analyze a range of…

  8. The future of voice-processing technology in the world of computers and communications.

    PubMed Central

    Kato, Y

    1995-01-01

    This talk, which was the keynote address of the NAS Colloquium on Human-Machine Communication by Voice, discusses the past, present, and future of human-machine communications, especially speech recognition and speech synthesis. Progress in these technologies is reviewed in the context of the general progress in computer and communications technologies. PMID:7479726

  9. 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…

  10. 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 in technology-enhanced learning Page 2 Abstract This thesis investigates the use of synthetic talking heads- enhanced learning. This work applies talking heads in a speech tutoring application for teaching English

  11. 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

  12. The Impact of Iranian Teachers Cultural Values on Computer Technology Acceptance

    ERIC Educational Resources Information Center

    Sadeghi, Karim; Saribagloo, Javad Amani; Aghdam, Samad Hanifepour; Mahmoudi, Hojjat

    2014-01-01

    This study was conducted with the aim of testing the technology acceptance model and the impact of Hofstede cultural values (masculinity/femininity, uncertainty avoidance, individualism/collectivism, and power distance) on computer technology acceptance among teachers at Urmia city (Iran) using the structural equation modeling approach. From among…

  13. The Use of Information Technologies for Education in Science, Mathematics, and Computers. An Agenda for Research.

    ERIC Educational Resources Information Center

    Educational Technology Center, Cambridge, MA.

    Developed to guide the research of the Educational Technology Center, a consortium based at Harvard Graduate School of Education, this report addresses the use of new information technologies to enrich, extend, and transform current instructional practice in science, mathematics, and computer education. A discussion of the basic elements required…

  14. Computer-Aided Software Engineering (CASE): Technology for Improving Software Development Productivity

    Microsoft Academic Search

    Albert F. Case Jr.

    1985-01-01

    Today, system developers are challenged to produce complex, high quality software to support explosive demand for new and revised computer applications. This challenge is complicated by severe resource constraints, forcing management to deploy new technologies, methods and procedures to manage this increasingly complex environment. Often the methods, procedures and technologies are not integrated. Therefore, they achieve less than desired improvements

  15. A theoretical model of differential social attributions toward computing technology: when the metaphor becomes the model

    Microsoft Academic Search

    George M. Marakas; Richard D. Johnson; Jonathan W. Palmer

    2000-01-01

    This paper explores the use of metaphorical personification (anthropomorphism) as an aid to describing and understanding the complexities of computing technologies. This common and seemingly intuitive practice (it “reads”, “writes”, “thinks”, “is friendly”, “catches and transmits viruses”, etc.) has become the standard by which we formulate our daily communications, and often our formal training mechanisms, with regard to the technology.

  16. The Use of Innovative Computer Technology for Teaching Social Communication to Individuals with Autism Spectrum Disorders

    ERIC Educational Resources Information Center

    Wainer, Allison L.; Ingersoll, Brooke R.

    2011-01-01

    For individuals with autism spectrum disorders (ASD), the use of technology to provide intervention, particularly targeting the core social-communication deficits of the disorder, is promising. This literature review will examine studies that have used innovative technology, such as interactive computer programs and virtual reality, to deliver…

  17. 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.…

  18. 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

  19. Investigation of Pre-Service Physical Education Teachers' Attitudes Towards Computer Technologies (Case of Turkey)

    ERIC Educational Resources Information Center

    Can, Suleyman

    2015-01-01

    Elicitation of pre-service physical education teachers' attitudes towards computer technologies seems to be of great importance to satisfy the conditions to be met for the conscious and effective use of the technologies required by the age to be used in educational settings. In this respect, the purpose of the present study is to investigate…

  20. 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 \\