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1

Computer generated holography using parallel commodity graphics hardware  

E-print Network

Computer generated holography using parallel commodity graphics hardware Lukas Ahrenberg Max of America OCIS codes: (090.0090) Holography; (090.1760) Computer holography; (090.2870) Holo- graphic display. References and links 1. M. Lucente, "Diffraction-Specific Fringe Computation for Electro-Holography

Magnor, Marcus

2

Haptic holography : an early computational plastic  

E-print Network

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

Plesniak, Wendy J. (Wendy Jean)

2001-01-01

3

Computational Highlight Holography Christian Regg1 Szymon Rusinkiewicz2 Wojciech Matusik3 Markus Gross1,3  

E-print Network

Computational Highlight Holography Christian Regg1 Szymon Rusinkiewicz2 Wojciech Matusik3 Markus: Computational highlight holography enables embedding three-dimensional models into reflective or transmissive and motion parallax (d). Abstract Computational highlight holography converts three-dimensional computer

4

Computer-Generated Polarization Holography  

NASA Astrophysics Data System (ADS)

The concept of a computer-generated polarization hologram (CPH) is based on the anisotropic interaction of light with photodichroic crystals. The most unique feature of this technique lies in the realization of phase information recording without the application of the detour phase or the optical path difference effect as used in the conventional technique. Basic principle of information writing and reading scheme using M-centers in alkali halide crystals such as sodium flouride ( NaF ) are descrived, and several technical merits and problems associated with this method are presented. This technique provides a real-time holographic system where accurate recordability and high storage capacity are attainable due to its possibility of recording a calcurated complex amplitude of wavefront only by means of controlling the polarization direction of illuminating beam. We also report on our trially developed automatic hologram making and reading system with the results of its operation experiment, and on discussions concerning the quality of the reconstructed image. We succeeded in completing a full automatic system which is able to make holograms automatically in a short time and in observing a reconstructed image of good quality in real-time.

Nakajima, Masato; Mitsuhashi, Yoshinobu

1983-10-01

5

Computer Technology  

NSDL National Science Digital Library

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

Mrs. Thackeray

2007-10-14

6

Computer holography: 3D digital art based on high-definition CGH  

NASA Astrophysics Data System (ADS)

Our recent works of high-definition computer-generated holograms (CGH) and the techniques used for the creation, such as the polygon-based method, silhouette method and digitized holography, are summarized and reviewed in this paper. The concept of computer holography is proposed in terms of integrating and crystalizing the techniques into novel digital art.

Matsushima, K.; Nakahara, S.; Arima, Y.; Nishi, H.; Yamashita, H.; Yoshizaki, Y.; Ogawa, K.

2013-02-01

7

Techniques for applying rigorous light-shielding to high-definition computer holography  

NASA Astrophysics Data System (ADS)

High-definition computer holography based on the polygon-based method commonly uses the silhouette method to shield light behind objects for hidden surface removal. However, the light-shielding is not perfect and causes leakage light passing through many gaps between silhouette-shaped masks. Although we have proposed the principle of more rigorous technique to remove the leakage light, the technique has never been applied to the actual high-definition computer holography because of its long computation time. We propose some techniques to reduce the computation time and apply the rigorous technique to high-definition computer holography. A CGH created by the proposed method is demonstrated.

Masuda, Sachio; Matsushima, Kyoji; Nakahara, Sumio

2014-02-01

8

Electronic display system for computational holography  

Microsoft Academic Search

We present an electro-optical apparatus capable of displaying a computer generated hologram (CGH) in real time. The CGH is calculated by a supercomputer, read from a fast frame buffer, and transmitted to a high-bandwidth acousto-optic modulator (AOM). Coherent light is modulated by the AOM and optically processed to produce a three-dimensional image with horizontal parallax.

Stephen A. Benton; Mark Lucente; Mary Lou Jepsen; Joel Kollin; Hiroshi Yoshikawa; John Underkoffler

1990-01-01

9

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

NASA Astrophysics Data System (ADS)

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

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

2011-11-01

10

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

NASA Astrophysics Data System (ADS)

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

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

2012-03-01

11

Computer-controlled active phase stabilization for electronic holography  

NASA Astrophysics Data System (ADS)

Electronic Holography or ESPI (electronic speckle pattern interferometry) is widely used for deformation analysis of complex, 3D surfaces. The sensitivity is well below 1 micron and deformations can be observed in real time. Any of those methods require either a constant phase between the interfering beams or a defined phase oscillation about a stable mean value or another controlled phase variation. The use of active control loops enhances the degree of phase constance, facilitates the defined variation of phase and permits a considerable reduction of cost for passive stabilizing installations, thus permitting the operation of an ESPI camera in an industrial production environment. By the use of a computer as active controller, autocalibration becomes feasible, a variety of stabilization parameters and algorithms can be tested easily, parameter optimization can be automized and phase perturbations can be recorded. User- guidance for failure diagnosis enhances further the user friendliness of the system. All this has been accomplished without any special or high-performance equipment, which allowed a relatively cheap realization. With an interferometer and photodiode amplifier as phase detector, a PC with a multi-I/O board and a piezo-mounted mirror with a simple, self-built driver as phase actuator, phase stabilization up to the kHz regime was demonstrated, limited by the mechanical resonances of the optical setup. The complete software has been developed by the author, using Oberon as language, operating system and development system.

Hrebabetzky, Frank

1996-07-01

12

Homodyne scanning holography Joseph Rosen*  

E-print Network

Homodyne scanning holography Joseph Rosen* Department of Electrical and Computer Engineering, Ben developed a modified version of a scanning holography microscope in which the Fresnel Zone Plates (FZP of America OCIS codes: (090.0090) Holography; (090.1760) Computer holography; (090.2880) Holographic

Rosen, Joseph

13

Holography: A survey  

NASA Technical Reports Server (NTRS)

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.

Dudley, D. D.

1973-01-01

14

COMPUTER SCIENCE INFORMATION TECHNOLOGY  

E-print Network

COMPUTER SCIENCE and INFORMATION TECHNOLOGY POSTGRADUATE STUDIES 2006 School of Mathematics of Information Systems with Honours Master of Science (Computer Science) Professional Doctorate in Science (Computer Science) PhD (Computer Science) The postgraduate programs in Computer Science and Information

Dunstan, Neil

15

Collinear holography  

Microsoft Academic Search

A novel reading and writing technology for a holographic storage system called collinear holography is developed. With this method, two-dimensional page data can be recorded as volumetric holograms generated by a reference beam and a signal beam that are bundled on the same axis and irradiated on the recording medium through a single objective lens. The multiplex recording and reconstructing

Hideyoshi Horimai; Xiaodi Tan; Jun Li

2005-01-01

16

Applications of digital holography to measurements and optical characterization  

NASA Astrophysics Data System (ADS)

With recent advances in high-speed computer and video capture technology, holographic films used in classical holography can be replaced with charged-coupled devices (CCD) and complementary metal-oxide-semiconductor (CMOS) image sensors to record and numerically reconstruct a hologram, which is now known as digital holography. Digital holography introduces something new to optical science. Wet chemical processing and other time-consuming procedures can be removed, so numerical recording and reconstruction can be realized in almost real time. It allows us to characterize the phase of a light field as well the intensity, and so the whole wave field can be measured and stored in a computer. Digital holography is expanding applications of holography and becoming a scientific and technological tool. Its use has now increased for measuring amplitude and the phase of object waves, displacement and three dimensional shape, particle distributions and motions, characterization of the refractive index and biological tissues, and vibration analysis, etc. Here, basic principles of digital holography for optical measurement and characterization are described. Taking into consideration the rapid advance in CCD and CMOS sensors as the background, the state-of-the-art applications of digital holography to optical measurement and characterization are presented.

Sang, Xinzhu; Yu, Chongxiu; Yu, Miao; Hsu, Dashsiung

2011-09-01

17

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

NASA Astrophysics Data System (ADS)

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.

Palevicius, Paulius; Ragulskis, Minvydas

2015-01-01

18

Intraoperative Brain Resection Cavity Characterization with Conoscopic Holography  

E-print Network

Intraoperative Brain Resection Cavity Characterization with Conoscopic Holography Amber L. Simpsona and driving model-based compensation strategies. Conoscopic holography, an interferometric technique holography device for intraoperative validation of our computation modeling approach to correcting for brain

Miga, Michael I.

19

Silhouette method for hidden surface removal in computer holography and its acceleration using the switch-back technique.  

PubMed

A powerful technique is presented for occlusion processing in computer holography. The technique offers an improvement on the conventional silhouette method, which is a general wave optics-based occlusion processing method. The proposed technique dramatically reduces the computation time required for computer-generated holograms (CGH) of self-occluded objects. Performance measurements show that a full-parallax high-definition CGH composed of billions of pixels and a small CGH intended to be reconstructed in electro-holography can be computed in only 1.7 h and 4.5 s, respectively, without any hardware acceleration. Optical reconstruction of the high-definition CGH shows natural and continuous motion parallax in the self-occluded object. PMID:25322021

Matsushima, Kyoji; Nakamura, Masaki; Nakahara, Sumio

2014-10-01

20

Computational structures technology  

NASA Technical Reports Server (NTRS)

Computational structures technology (CST), which has emerged from FEM developments, is a fusion of materials modeling, structural and dynamic analysis and synthesis methods, on the one hand, and numerical analysis and approximation theory, on the other. In addition to computational materials modeling, CST encompasses computational methods for predicting the response, performance, failure, and service life of structures and their components, as well as automated methods for structural synthesis and optimization.

Noor, Ahmed K.

1992-01-01

21

Computer Technology for Industry  

NASA Technical Reports Server (NTRS)

In this age of the computer, more and more business firms are automating their operations for increased efficiency in a great variety of jobs, from simple accounting to managing inventories, from precise machining to analyzing complex structures. In the interest of national productivity, NASA is providing assistance both to longtime computer users and newcomers to automated operations. Through a special technology utilization service, NASA saves industry time and money by making available already developed computer programs which have secondary utility. A computer program is essentially a set of instructions which tells the computer how to produce desired information or effect by drawing upon its stored input. Developing a new program from scratch can be costly and time-consuming. Very often, however, a program developed for one purpose can readily be adapted to a totally different application. To help industry take advantage of existing computer technology, NASA operates the Computer Software Management and Information Center (COSMIC)(registered TradeMark),located at the University of Georgia. COSMIC maintains a large library of computer programs developed for NASA, the Department of Defense, the Department of Energy and other technology-generating agencies of the government. The Center gets a continual flow of software packages, screens them for adaptability to private sector usage, stores them and informs potential customers of their availability.

1979-01-01

22

The fast scheme for mixed-3D scenes by polygon-based computer-generated holography (CGH)  

NASA Astrophysics Data System (ADS)

We proposed a fast scheme for computer-generated holography (CGH) to mix 3D scenes. The objects in the proposed include the real and virtual objects. Make a point cloud model of real object, and then converted to a triangular mesh model. And mix the triangular mesh model with virtual 3D object mesh models. Using the angular spectrum method to generated hologram, and it is convenient to accelerating with GPU.

Piao, Yan-Ling; Le, Thanh B.; Li, Weina; Jeong, Jong-Rea; Kim, Nam

2014-02-01

23

Holography Without Photography Thad G. Walker  

E-print Network

Holography Without Photography Thad G. Walker Department of Physics, University of Wisconsin be useful for lecture demonstration and holography laboratories. Given an arbitrary holographic phase/amplitude plate, computer-generated holography attempts to find a suitable binary encoding of the (complex

Walker, Thad G.

24

Potential of digital holography in particle measurement  

Microsoft Academic Search

This paper describes the potential power of digital holography in particle measurement and its expected development in the near future. In digital holography, image reconstruction is carried out numerically on a computer using observed hologram patterns and some quantitative information can be derived from the reconstructed images. In this paper, the basic concept and procedure of digital in-line holography are

Shigeru Murata; Norifumi Yasuda

2000-01-01

25

EDITORIAL: Optical tomography and digital holography  

NASA Astrophysics Data System (ADS)

The articles in this special feature in Measurement Science and Technology concern exciting new developments in the field of digital holography—the process of electronically recording and numerically reconstructing an optical field [1]. Making use of the enormous advances in digital imaging and computer technology, digital holography is presented in a range of applications from fluid flow measurement and structural analysis to medical imaging. The science of digital holography rests on the foundations of optical holography, on the work of Gabor in the late 1940s, and on the development of laser sources in the 1960s, which made his vision a practical reality [2]. Optical holography, however, uses a photosensitive material, both to record a latent image and subsequently to behave as a diffractive optical element with which to reconstruct the incident field. In this way display holograms, using silver halide materials for example, can produce life-size images that are virtually indistinguishable from the object itself [3]. Digital holography, in contrast, separates the steps of recording and reconstruction, and the final image is most often in the form of a 3D computer model. Of course, television cameras have been used from the beginnings of holography to record interferometric images. However, the huge disparity between the resolution of holographic recording materials (more than 3000 cycles/mm) and television cameras (around 50 cycles/mm) was raised as a major concern by early researchers. TV holography, as it was sometimes called, generally recorded low numerical aperture (NA) holograms producing images with characteristically large speckle and was therefore more often referred to as electronic speckle pattern interferomery (ESPI) [4]. It is possible, however, to record large NA holograms on a sensor with restricted resolution by using an objective lens or a diverging reference wave [5]. This is generally referred to as digital holographic microscopy (DHM) since the resolution now places a limit on the size of the object that can be recorded. Some 60 years after the pioneering work of Gabor, digital imaging and associated computer technology offers a step change in capability with which to further exploit holography. Modern image sensors are now available with almost 30 million photosensitive elements, which corresponds to a staggering 100-fold increase compared to standard television images. At the same time personal computers have been optimized for imaging and graphics applications and this allows more sophisticated algorithms to be used in the reconstruction process. Although resolution still falls short of the materials used for optical holography, the ability to process data numerically generally outweighs this drawback and presents us with a host of new opportunities. Faced with the ability to record and process holograms numerically, it is natural to ask the question 'what information is present within recordings of scattered light?'. In fact this question could be posed by anyone using light, or indeed any other wave disturbance, for measurement purposes. For the case of optical holography, Wolf published his answer in 1969 [6], showing that for the case of weak scattering (small perturbations) and plane wave illumination, the amplitude and phase of each plane wave within the scattered field are proportional to those of a periodic variation in the refractive index contrast (i.e. a Bragg grating). This Fourier decomposition of the object was published almost simultaneously by Dandliker and Weiss [7], who also provided a graphical illustration of the technique. These works are the basis of optical tomography and provide us with the link between holographic data and 3D form. Digital holographic reconstruction and optical tomography was the theme of an international workshop [8] held in Loughborough in 2007, and many of the topics debated at the workshop have become the subject of the papers in this issue. In general terms the papers we present describe closely related holographic techniques that address applicat

Coupland, Jeremy; Lobera, Julia

2008-07-01

26

Common path in-line holography using enhanced joint object reference digital  

E-print Network

Common path in-line holography using enhanced joint object reference digital interferometers Roy: (090.0090) Holography; (090.1995) Digital holography; (090.1760) Computer holography; (110.6880) Three digital holography," Opt. Lett. 38(22), 4719­4722 (2013). 2. B. Katz, J. Rosen, R. Kelner, and G. Brooker

Rosen, Joseph

27

Holography in the Junior High.  

ERIC Educational Resources Information Center

Examines the use of holography in the art technology program of a junior high school. Characterizing holography as a valuable artistic experience and discovery experience and stressing the importance of student interest and involvement, the author discusses the necessary equipment for the project and includes two diagrams of a holographic setup.…

Tomaszkiewicz, Frank

1988-01-01

28

PRINCIPLES OF SEISMIC HOLOGRAPHY FOR DIAGNOSTICS OF THE SHALLOW SUBPHOTOSPHERE Charles Lindsey and D. C. Braun  

E-print Network

PRINCIPLES OF SEISMIC HOLOGRAPHY FOR DIAGNOSTICS OF THE SHALLOW SUBPHOTOSPHERE Charles Lindsey develop the wave-mechanical formalism for phase-correlation computational seismic holography holography of helioseismic observa- tions has rendered a remarkable array of diagnostic utilities for solar

Braun, Douglas C.

29

Children and Computers: New Technology--  

E-print Network

31 Children and Computers: New Technology-- Old Concerns Ellen A.Wartella Nancy Jennings Abstract Computer technology has ushered in a new era of mass media, bringing with it great promise and great as being new, similar promises and con- cerns have accompanied each new wave of media technology throughout

Cassell, Justine

30

Internet Archive: Computers & Technology  

NSDL National Science Digital Library

The Internet Archive has gathered up this excellent audio collection featuring interviews, discussions, and musings about computers, technology, and science. All told, there are over 700 audio files here, including the popular Groks Science Radio Show and Podcast and Textfiles BBS Audio. This last collection contains a varied set of audio files assembled by Jason Scott, curator of textfiles.com. Here, visitors can learn about the days of ASCII and Dial-up Bulletin Board Systems (BBS) that were popular from the 1970s to the early 1990s. To get started, first-time visitors can look over the Most Downloaded Items for a few suggestions, or simply find out more via the About the Archive area.

31

[Earth Science Technology Office's Computational Technologies Project  

NASA Technical Reports Server (NTRS)

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.

Fischer, James (Technical Monitor); Merkey, Phillip

2005-01-01

32

Electron Holography Image Simulation of Nanoparticles K. Keimpema,1,  

E-print Network

Electron Holography Image Simulation of Nanoparticles K. Keimpema,1, H. De Raedt,1, and J to compute numerically, the phase images observed by electron holography of nanoscale particles to compute the electron holography phase images of slabs with surface roughness and slabs containing magnetic

33

Computer Viruses. Technology Update.  

ERIC Educational Resources Information Center

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

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

34

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

Microsoft Academic Search

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,

Masahiro Daibo; Norio Tayama

1998-01-01

35

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

NASA Astrophysics Data System (ADS)

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.

Daibo, Masahiro; Tayama, Norio

1998-09-01

36

Computer Technology for Industry.  

ERIC Educational Resources Information Center

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…

Aviation/Space, 1982

1982-01-01

37

Computer Technology and Social Issues.  

ERIC Educational Resources Information Center

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

Garson, G. David

38

Holography as a new art form  

NASA Astrophysics Data System (ADS)

Holography display--is it science, technology, fiction, technoart? Nobody knows. Holography is not considered an art form or an accepted form of expression. This `twenty-third century' art form is evoking a violent and hostile reaction among many fine art museums across the nation, in my own experience.

Lopez, Jesus

1998-02-01

39

Computer Technology for Industry  

NASA Technical Reports Server (NTRS)

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.

1982-01-01

40

Information Technology: Computer Systems Engineer  

NSDL National Science Digital Library

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

2012-05-30

41

Trusted Computing Technologies, Intel Trusted Execution Technology.  

SciTech Connect

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

Guise, Max Joseph; Wendt, Jeremy Daniel

2011-01-01

42

Thermodynamic holography  

E-print Network

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.

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

2014-11-24

43

Ferroelectric electron holography.  

PubMed

Ferroelectrics are increasingly important as materials in semiconductor technology, e.g. for building non-volatile memory chips. For optimisation of the properties of such devices, there is an urgent need for methods, which analyse the ferroelectric properties at nanometer scale. Furthermore, the basic understanding of the interaction of ferroelectrics with electrons in the transmission electron microscopy is still incomplete. It is shown that electron holography offers a promising way to understand and investigate ferroelectrics in the electron microscope. PMID:12492231

Lichte, Hannes; Reibold, Marianne; Brand, Karin; Lehmann, Michael

2002-12-01

44

Optical Computers and Space Technology  

NASA Technical Reports Server (NTRS)

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.

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

1995-01-01

45

Holography By Kurt Schab  

E-print Network

Holography By Kurt Schab Abstract Holography is a method to capture detailed 3dimensional with photographic film, much of the current work in holography is now done with CCD's and digital reconstruction methods. This report and presentation outlines the fundamental mathematics of holography and describes

La Rosa, Andres H.

46

Cooling Technology for Electronic Computers  

NASA Astrophysics Data System (ADS)

The rapid growth of data processing speed in computers has been sustained by the advances in cooling technology. This article first presents a review of the published data of heat loads in recent Japanese large-scale computers. The survey indicates that, since around 1980, the high-level integration of microelectronic circuits has brought about almost four fold increase in the power dissipation from logic chips. The integration also has invited the evolutions of multichip modules and new schemes of electronic interconnections. Forced convection air-cooling and liquid cooling coupled with thermal connectors are discussed with reference to the designs employed in actual computers. More advanced cooling schemes are also discussed. Finally, the importance of thermal environmental control of computer rooms is emphasized.

Nakayama, Wataru

47

Center for Advanced Computational Technology  

NASA Technical Reports Server (NTRS)

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

Noor, Ahmed K.

2000-01-01

48

XRay Fluorescence Holography and Multiple Energy XRay Holography  

E-print Network

X­Ray Fluorescence Holography and Multiple Energy X­Ray Holography: A Comparative Study.­W. B¨u�er #12; i X­Ray Fluorescence Holography and Multiple Energy X­Ray Holography: A Comparative Study Abstract X­ray fluorescence holography (XFH) and multiple energy x­ray holography (MEXH) are new

49

Dental Holography  

NASA Astrophysics Data System (ADS)

Ten years have passed since the first articles appeared in this new field. The qualities of the laser light together with the need of contactless 3-D measurements for different dental purposes seemed to be extremely promising, but still just a few scientists have used the method and mostly for laboratory studies. For some reason there has been a preponderance for orthodontic measurements. This seems to be a bit peculiar from holographic view compared with measurements for engineering purposes, which usually are made on metals. So naturally holography can become a clinical tool for measurements in the field of fixed bridges, removable partial dentures and implants. One of the problems is that the need for holography in dental research must be fulfilled in collaboration with physicists. Only a two-way communication during an entire experiment can balance both technical and odontological demands and thus give practical and clinical important results. The need for an easy way of handling the evaluation to get all required information is another problem and of course the holographic equipment must be converted to a box easy to handle for everyone. At last the position of dental holography today is going to be carefully examined together with an attempt to look into the hopefully exciting and not to utopic future for this research field.

Dirtoft, Ingegerd

1983-12-01

50

Infinite possibilities: Computational structures technology  

NASA Technical Reports Server (NTRS)

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. Transferring the digital files to videotape presents a number of problems related to maintaining the quality of the original image, while still producing a broadcast quality videotape. Since researchers normally do not create a 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.

Beam, Sherilee F.

1994-01-01

51

Infinite possibilities: Computational structures technology  

NASA Astrophysics Data System (ADS)

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.

Beam, Sherilee F.

1994-12-01

52

Computer technologies and institutional memory  

NASA Technical Reports Server (NTRS)

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.

Bell, Christopher; Lachman, Roy

1989-01-01

53

Teaching with technology: computer basics.  

PubMed

In this bimonthly series, the author examines how nurse educators can use Internet and Web-based computer technologies such as search, communication, and collaborative writing tools, social networking and social bookmarking sites, virtual worlds, and Web-based teaching and learning programs. This article describes approaches to finding information on the Web. Web-based search tools including Internet search engines, organizational databases, and those at the library will be discussed. Techniques to evaluate the validity, usefulness, and applicability of search outcomes are included. PMID:19104333

Wink, Diane

2009-01-01

54

Single Beam Holography.  

ERIC Educational Resources Information Center

Discusses how holography can be used as part of undergraduate physics laboratories. The authors propose a single beam technique of holography, which will reduce the recording scheme as well as relax the isolation requirements. (HM)

Chen, Hsuan; Ruterbusch, Paul H.

1979-01-01

55

Content metamorphosis in synthetic holography  

NASA Astrophysics Data System (ADS)

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.

Desbiens, Jacques

2013-02-01

56

Holography of incoherently illuminated 3D scenes Natan T. Shaked and Joseph Rosen  

E-print Network

Holography of incoherently illuminated 3D scenes Natan T. Shaked and Joseph Rosen Department conventional holography, namely the need for a powerful, highly coherent laser and meticulous stability which can be useful for a variety of practical applications. Keywords: Digital and computer holography

Rosen, Joseph

57

June 15, 1998 / Vol. 23, No. 12 / OPTICS LETTERS 915 Nonvolatile photorefractive spectral holography  

E-print Network

holography Kazutaka Oba, Pang-Chen Sun, and Yeshaiahu Fainman Department of Electrical and Computer have been explored, including volume holography in photorefractive materials,1 ­ 5 two-photon recording and show the potential for a time-domain-transparent optical storage system. Spectral holography10 can

Fainman, Yeshaiahu

58

Advanced laptop and small personal computer technology  

NASA Technical Reports Server (NTRS)

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

Johnson, Roger L.

1991-01-01

59

Autofocusing research on terahertz off-axis digital holography  

NASA Astrophysics Data System (ADS)

Terahertz (THz) digital holography is a combination of THz technology and digital holography which has drawn wide attention. Exact measurements of real recording distances in terahertz (THz) digital holography are important. Autofocusing experimental researches have been conducted based on the holograms in THz off-axis digital holography. Five criterion functions are utilized in this paper. Autofocusing performance of these criterion functions has been analyzed and compared by changing the numbers of the superposition frames of holograms. Experiment results show that five criterion functions all have preferable autofocusing performance with the 5-frame averaged holograms; standard deviation-based correlation criterion function has the worst autofocusing performance.

Li, Qi; Hu, Jia-Qi; Li, Yun-Da; Xue, Kai

2014-12-01

60

Review of cooling technologies for computer products  

Microsoft Academic Search

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

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

2004-01-01

61

Center for Computational Structures Technology  

NASA Technical Reports Server (NTRS)

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.

Noor, Ahmed K.; Perry, Ferman W.

1995-01-01

62

Virtual integral holography  

NASA Astrophysics Data System (ADS)

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

Venolia, Dan S.; Williams, Lance

1990-08-01

63

Emerging Holography  

E-print Network

We rederive AdS/CFT predictions for infrared two-point functions by an entirely four dimensional approach, without reference to holography. This approach, originally due to Migdal in the context of QCD, utilizes an extrapolation from the ultraviolet to the infrared using a Pade approximation of the two-point function. We show that the Pade approximation and AdS/CFT give the same leading order predictions, and discuss including power corrections such as those due to condensates of gluons and quarks in QCD. At finite order the Pade approximation provides a gauge invariant regularization of a higher dimensional gauge theory in the spirit of deconstructed extra dimensions. The radial direction of anti-de Sitter space emerges naturally in this approach.

Joshua Erlich; Graham D. Kribs; Ian Low

2006-02-13

64

Emerging holography  

SciTech Connect

We rederive AdS/CFT predictions for infrared two-point functions by an entirely four-dimensional approach, without reference to holography. This approach, originally due to Migdal in the context of QCD, utilizes an extrapolation from the ultraviolet to the infrared using a Pade approximation of the two-point function. We show that the Pade approximation and AdS/CFT give the same leading order predictions, and we discuss including power corrections such as those due to condensates of gluons and quarks in QCD. At finite order the Pade approximation provides a gauge invariant regularization of a higher dimensional gauge theory in the spirit of deconstructed extra dimensions. The radial direction of anti-de Sitter space emerges naturally in this approach.

Erlich, Joshua [Department of Physics, College of William and Mary, Williamsburg, Virginia 23187 (United States); Kribs, Graham D. [Department of Physics and Institute of Theoretical Science, University of Oregon, Eugene, Oregon 97403 (United States); Low, Ian [School of Natural Sciences, Institute for Advanced Study, Princeton, New Jersey 08540 (United States)

2006-05-01

65

Computer Technology: State of the Art.  

ERIC Educational Resources Information Center

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

Withington, Frederic G.

1981-01-01

66

Disruptive technology business models in cloud computing  

E-print Network

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 ...

Krikos, Alexis Christopher

2010-01-01

67

Computing with RFID: Drivers, Technology and Implications  

E-print Network

Computing with RFID: Drivers, Technology and Implications George Roussos School of Computer Science Frequency Identification or simply rfid has come to be an integral part of modern computing. Rfid is notable, we cater to the computing professional who is not familiar with the specifics of rfid which we

Roussos, George

68

An improved method for computer generation of three-dimensional digital holography  

NASA Astrophysics Data System (ADS)

A novel method is proposed for designing optimized three-dimensional computer-generated holograms (CGHs). A series of spherical wave factors are introduced into the conventional optimal rotation angle (ORA) algorithm to achieve a varying amount of defocus along the optical axis, and the distraction terms are minimized during the iterative process. Both numerical simulation and experimental reconstructions are presented to demonstrate that this method is able to yield excellent multilayer patterns with high uniformity and signal-to-noise ratio (SNR). This method is significant for applications in laser 3D printing and multilayer data recording.

Hu, Yanlei; Ma, Jianqiang; Chen, Yuhang; Li, Jiawen; Huang, Wenhao; Chu, Jiaru

2013-12-01

69

Persuasion Strategies for Computers as Persuasive Technologies  

Microsoft Academic Search

Similar to human persuaders in our society, persuasive computing technologies can influence people's attitudes and bring some constructive changes in many domains such as marketing, health, safety, environment and so on. Since the study of computers as persuasive technologies was introduced at CHI 97 as a new research area, more valuable studies have been done in this relatively unexplored area.

Ran Cheng

70

Prior Computer Experience and Technology Acceptance  

ERIC Educational Resources Information Center

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…

Varma, Sonali

2010-01-01

71

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

E-print Network

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

Donsez, Didier

72

From Computer Lab to Technology Class.  

ERIC Educational Resources Information Center

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…

Sherwood, Sandra

1999-01-01

73

The Role of Grid Computing Technologies in Cloud Computing  

Microsoft Academic Search

\\u000a The fields of Grid, Utility and Cloud Computing have a set of common objectives in harnessing shared resources to optimally\\u000a meet a great variety of demands cost-effectively and in a timely manner Since Grid Computing started its technological journey\\u000a about a decade earlier than Cloud Computing, the Cloud can benefit from the technologies and experience of the Grid in building

David Villegas; Ivan Rodero; Liana Fong; Norman Bobroff; Yanbin Liu; Manish Parashar; S. Masoud Sadjadi

2010-01-01

74

Campus Computer Store Information Technology Services  

E-print Network

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

Saskatchewan, University of

75

Assistive Technology for the Disabled Computer User.  

ERIC Educational Resources Information Center

Assistive technology that can help disabled computer users is described, and a resource guide to computer help for the disabled is presented. The Americans with Disabilities Act of 1990 has broad implications for higher education, in that it mandates that colleges and universities give disabled students equal access to computers on public…

Wilson, Linda

76

Adaptive Computing Technology and the Disabled.  

ERIC Educational Resources Information Center

Adaptive technology offers people with disabilities the opportunity not just to use computers, but to use computers to complete tasks that were previously not possible for them. Computers can be used to assist individuals with speech or writing impairments, physical or mobility impairments, visual impairments, and learning disabilities. (Author/JL)

Harrell, William L.

1998-01-01

77

Computer Technology Resources for Literacy Projects.  

ERIC Educational Resources Information Center

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…

Florida State Council on Aging, Tallahassee.

78

Interstellar Holography  

E-print Network

The dynamic spectrum of a radio pulsar is an in-line digital hologram of the ionised interstellar medium. It has previously been demonstrated that such holograms permit image reconstruction, in the sense that one can determine an approximation to the complex electric field values as a function of Doppler-shift and delay, but to date the quality of the reconstructions has been poor. Here we report a substantial improvement in the method which we have achieved by simultaneous optimisation of the thousands of coefficients that describe the electric field. For our test spectrum of PSR B0834+06 we find that the model provides an accurate representation of the data over the full 63 dB dynamic range of the observations: residual differences between model and data are noise-like. The advent of interstellar holography enables detailed quantitative investigation of the interstellar radio-wave propagation paths for a given pulsar at each epoch of observation; we illustrate this using our test data which show the scattering material to be structured and highly anisotropic. The temporal response of the medium exhibits a scattering tail out to beyond 100 microsec and a pulse arrival time measurement at this frequency and this epoch of observation would be affected by a mean delay of 15 microsec due to multipath propagation in the interstellar medium.

Mark Walker; Leon Koopmans; Dan Stinebring; Willem van Straten

2008-01-28

79

48 Years with holography  

NASA Astrophysics Data System (ADS)

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.

Kubota, Toshihiro

2014-11-01

80

Computing, Information and Communications Technology (CICT) Website  

NASA Technical Reports Server (NTRS)

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).

Hardman, John; Tu, Eugene (Technical Monitor)

2002-01-01

81

The Role of Grid Computing Technologies in Cloud Computing  

NASA Astrophysics Data System (ADS)

The fields of Grid, Utility and Cloud Computing have a set of common objectives in harnessing shared resources to optimally meet a great variety of demands cost-effectively and in a timely manner Since Grid Computing started its technological journey about a decade earlier than Cloud Computing, the Cloud can benefit from the technologies and experience of the Grid in building an infrastructure for distributed computing. Our comparison of Grid and Cloud starts with their basic characteristics and interaction models with clients, resource consumers and providers. Then the similarities and differences in architectural layers and key usage patterns are examined. This is followed by an in depth look at the technologies and best practices that have applicability from Grid to Cloud computing, including scheduling, service orientation, security, data management, monitoring, interoperability, simulation and autonomic support. Finally, we offer insights on how these techniques will help solve the current challenges faced by Cloud computing.

Villegas, David; Rodero, Ivan; Fong, Liana; Bobroff, Norman; Liu, Yanbin; Parashar, Manish; Sadjadi, S. Masoud

82

(CICT) Computing, Information, and Communications Technology Overview  

NASA Technical Reports Server (NTRS)

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.

VanDalsem, William R.

2003-01-01

83

Holography for Schrodinger backgrounds  

E-print Network

We discuss holography for Schrodinger solutions of both topologically massive gravity in three dimensions and massive vector theories in (d+1) dimensions. In both cases the dual field theory can be viewed as a d-dimensional conformal field theory (two dimensional in the case of TMG) deformed by certain operators that respect the Schrodinger symmetry. These operators are irrelevant from the viewpoint of the relativistic conformal group but they are exactly marginal with respect to the non-relativistic conformal group. The spectrum of linear fluctuations around the background solutions corresponds to operators that are labeled by their scaling dimension and the lightcone momentum k_v. We set up the holographic dictionary and compute 2-point functions of these operators both holographically and in field theory using conformal perturbation theory and find agreement. The counterterms needed for holographic renormalization are non-local in the v lightcone direction.

Monica Guica; Kostas Skenderis; Marika Taylor; Balt van Rees

2010-08-11

84

Computer graphics for holography  

Microsoft Academic Search

Holograms composed from a multiplicity of independent object views, referred to as composite holograms, are discussed. Three techniques, one an extension of old techniques and the others new, are presented. The latter are called the direct method and the postrendering method. The direct approach is favored because it uses less disk space. However, it requires somewhat more care because the

Kenneth Haines; Debby Haines

1992-01-01

85

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.

86

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.

87

Beyond Computation: Information Technology, Organizational  

E-print Network

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

88

Ultimate computing. Biomolecular consciousness and nano Technology  

SciTech Connect

The book advances the premise that the cytoskeleton is the cell's nervous system, the biological controller/computer. If indeed cytoskeletal dynamics in the nanoscale (billionth meter, billionth second) are the texture of intracellular information processing, emerging ''NanoTechnologies'' (scanning tunneling microscopy, Feynman machines, von Neumann replicators, etc.) should enable direct monitoring, decoding and interfacing between biological and technological information devices. This in turn could result in important biomedical applications and perhaps a merger of mind and machine: Ultimate Computing.

Hameroff, S.R.

1987-01-01

89

Scalable Optical Architectures for Electronic Holography.  

NASA Astrophysics Data System (ADS)

Holography has long been recognized as an effective way to convey the information of complex 3-dimensional structures such as those encountered in medical imaging, computer-aided design and navigation. However, attempts at implementing a real-time holographic display device have been hampered by the enormous space-bandwidth products required by such a task. I present here an approach that alleviates many of the problems encountered in previous attempts at real-time computer generated holography. The basic idea underlying the MIT electronic holography display is the use of an acousto-optic modulator as a dynamic display medium and the synthesis of a large aperture by scanning the image of the modulator. The original implementation of the display is unsuitable for images larger than a few square centimeters, because the necessary optical space -bandwidth product become unmanageable by the electronic and optical subsystems. The goal of this thesis is to demonstrate that large displays can be implemented with available technologies if we break the space bandwidth product in small segments at both the image plane and Fourier plane, i.e. if we take a parallel approach. In the image plane domain the display space-bandwidth product can be increased by simultaneously writing multiple acoustic columns on a single crystal and then optically multiplexing the resulting holograms. I discuss the proper conditions under which the interline crosstalk remains acceptable and introduce a scanning geometry that allows for such a multiple channel operation. The Fourier domain can also be segmented in small domains, each being processed by a different scanning element. I describe the behavior of the image when such a segmentation in implemented and I then derive the conditions under which it can be effected without incurring significant image degradation. I finally describe the implementation of these concepts into a large scale holographic display which includes the use of an array of 6 galvanometric scanners as the horizontal scanning element, two 18-channel acousto-optic Bragg cells working in tandem, and a bank of custom-designed high-bandwidth framebuffers. The application of the concept of parallelism has allowed a six-fold scale-up of the display, which now produces high quality images 150mm times 75 mm in frontal dimensions, with a 30 degrees view zone. (Copies available exclusively from MIT Libraries, Rm. 14-0551, Cambridge MA 02139-4307. Ph. 617-253-5668; Fax 617-253-1690.).

St.-Hilaire, Pierre

90

Recent developments in computer-generated holography: toward a practical electroholography system for interactive 3D visualization  

NASA Astrophysics Data System (ADS)

This paper will give an overview of some recent developments in electroholography for applications in interactive 3D visualisation. Arguably the ultimate technology for this task, it is the only approach having the potential to deliver full depth cue, 3D images, having resolutions beyond that which can be perceived by the human eye. Despite significant advances by many researchers, the high pixel counts required by the computer generated hologram (CGH) patterns in these systems remain daunting - in practice, systems able to calculate and display reconfigurable CGH having pixel counts of more than one billion may be required for 300 mm width, 3D images. Advances described include novel Fourier mode variants of diffraction specific algorithms and parallel binarisation techniques for design of the CGH patterns; computer architectures for effective implementation of these algorithms for interactive CGH calculation; the latest developments in the Active Tiling spatial light modulator technology and novel replay optics arrangements including folded mirror geometries, viewer tracking alternatives and new horizontal parallax configurations. Throughout, the emphasis is optimisation towards implementation as an interactive electroholography system having practical utility. Some recent results from demonstrations of aspects of the technology will be shown. These include monochrome and colour, static and dynamic, horizontal parallax only (HPO) and full parallax, 3D images, generated from true CGH systems with up to 24 billion pixels.

Slinger, Christopher W.; Cameron, Colin D.; Coomber, Stuart D.; Miller, Richard J.; Payne, Doug A.; Smith, Allan P.; Smith, Mark G.; Stanley, Maurice; Watson, Philip J.

2004-06-01

91

Computer Maintenance Technology. Suggested Basic Course Outline.  

ERIC Educational Resources Information Center

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

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

92

Computer-Optimized Adaptive Suspension Technology (COAST)  

Microsoft Academic Search

This paper presents a fundamental vehicle suspension system using real-time computer control. This Computer-Optimized Adaptive Suspension Technology (COAST) consists of a microprocessor-controlled, fully integrated, adaptive suspension system. COAST is capable of providing near-optimum performance for any land surface vehicle in any environment and can be implemented in a relatively simple and cost-effective manner.

James M. Hamilton

1985-01-01

93

Computer technology forecast study for general aviation  

NASA Technical Reports Server (NTRS)

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.

Seacord, C. L.; Vaughn, D.

1976-01-01

94

Faculty of Computer Science & Technology  

E-print Network

such as the provision of an optimal digital infrastructure; sensing the planet and optimising use of physical resources software, animation and gaming, as well as many of the major names in finance, defence, communications-known process theories and the extraordinary challenge that Ubiquitous Computing presents for sound engineering

Haddadi, Hamed

95

Hardware Considerations for Computer Based Education in the 1980's.  

ERIC Educational Resources Information Center

In the future, computers will be needed to sift through the vast proliferation of available information. Among new developments in computer technology are the videodisc microcomputers and holography. Predictions for future developments include laser libraries for the visually handicapped and Computer Assisted Dialogue. (JN)

Hirschbuhl, John J.

1980-01-01

96

Holography - Application To Art: Curatorial Observations  

NASA Astrophysics Data System (ADS)

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

Dinsmore, Sydney

1987-06-01

97

Information Technology Student: Computer Programming & Support  

NSDL National Science Digital Library

In this video adapted from Pathways to Technology, learn how exploring an interest in computers can lead to a new career. After taking, and enjoying, an online course, Hilda Villavicencio decided to study computer programming and information technology (IT) at community college. Students who attend an IT program learn how computers function, so that whether they go into networking, technical support, or any other branch of IT, they bring a solid understanding of computer systems and how to maintain them. Hilda interns at the computer help-desk at her school where she uses what she's learning in the classroom to help others. She explains where she'd like to be in five years, and how her degree will take her there.The video runs 3:12 and is accompanied by a background essay, standards alignment, and discussion questions. Users who sign up for a free account can save the resource and download the video as well.

2012-05-30

98

Research on Key Technologies of Cloud Computing  

NASA Astrophysics Data System (ADS)

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

Zhang, Shufen; Yan, Hongcan; Chen, Xuebin

99

Computer Game and Simulation Technology  

NSDL National Science Digital Library

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

2010-12-17

100

Beam damage detection using computer vision technology  

Microsoft Academic Search

In this paper, a new approach for efficient damage detection in engineering structures is introduced. The key concept is to use the mature computer vision technology to capture the static deformation profile of a structure, and then employ profile analysis methods to detect the locations of the damages. By combining with wireless communication techniques, the proposed approach can provide an

Jing Shi; Xiangjun Xu; Jialai Wang; Gong Li

2010-01-01

101

Oasis cooling packaging technology for notebook computers  

Microsoft Academic Search

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

G. Kuzmin

1994-01-01

102

Women Workers as Users of Computer Technology.  

ERIC Educational Resources Information Center

Discussion of expectations, trends, and implications of growth of computer technology and its effect on women workers argues that the experience of women is different from that of men in the nature of jobs in which women are found, their training and education, home-family conflict, and discrimination. The impact on women of increasing…

Larwood, Laurie

1992-01-01

103

Entanglement renormalization and holography  

E-print Network

We show how recent progress in real space renormalization group methods can be used to define a generalized notion of holography inspired by holographic dualities in quantum gravity. The generalization is based upon ...

Swingle, Brian Gordon

104

Conductivity of a strange metal: from holography to memory functions  

E-print Network

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 equivalent to what is computed, independently of holography, via the memory function framework.

Lucas, Andrew

2015-01-01

105

Future Applications of Electronic Technology to Education.  

ERIC Educational Resources Information Center

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

Lewis, Arthur J.; And Others

106

Reviews of computing technology: Object-oriented technology  

SciTech Connect

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

Skeen, D.C.

1993-03-01

107

Maximizing a transport platform through computer technology.  

PubMed

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

Hudson, Timothy L

2003-01-01

108

Electron Holography of Magnetic Materials  

E-print Network

3 Electron Holography of Magnetic Materials Takeshi Kasama1, Rafal E. Dunin-Borkowski2 and Marco of the most powerful techniques for providing this information is electron holography, which was originally, 1949). Electron holography is still the only technique that provides direct access to the phase shift

Dunin-Borkowski, Rafal E.

109

Localization & Exact Holography  

E-print Network

We consider the AdS_2/CFT_1 holographic correspondence near the horizon of big four-dimensional black holes preserving four supersymmetries in toroidally compactified Type-II string theory. The boundary partition function of CFT_1 is given by the known quantum degeneracies of these black holes. The bulk partition function is given by a functional integral over string fields in AdS_2. Using recent results on localization we reduce the infinite-dimensional functional integral to a finite number of ordinary integrals over a space of localizing instantons. Under reasonable assumptions about the relevant terms in the effective action, these integrals can be evaluated exactly to obtain a bulk partition function. It precisely reproduces all terms in the exact Rademacher expansion of the boundary partition function as nontrivial functions of charges except for the Kloosterman sum which can in principle follow from an analysis of phases in the background of orbifolded instantons. Our results can be regarded as a step towards proving `exact holography' in that the bulk and boundary partition functions computed independently agree for finite charges. Since the bulk partition function defines the quantum entropy of the black hole, our results enable the evaluation of perturbative as well as nonperturbative quantum corrections to the Bekenstein-Hawking-Wald entropy of these black holes.

Atish Dabholkar; Joao Gomes; Sameer Murthy

2011-11-04

110

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

NASA Technical Reports Server (NTRS)

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.

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

1998-01-01

111

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

NASA Astrophysics Data System (ADS)

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.

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

2011-10-01

112

Haptic Holography/Touching the Ethereal  

NASA Astrophysics Data System (ADS)

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.

Page, Michael

2013-02-01

113

Grid computing technology for hydrological applications  

NASA Astrophysics Data System (ADS)

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.

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

2011-06-01

114

Computational Support for Technology- Investment Decisions  

NASA Technical Reports Server (NTRS)

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

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

2007-01-01

115

Gene Network Holography of the Soil Bacterium Bacillus subtilis Dalit Roth1  

E-print Network

1 Gene Network Holography of the Soil Bacterium Bacillus subtilis Dalit Roth1 , Asaf Madi1 , Dror Y. Microarray technology has played an important role in promoting the understanding of gene network regulations from gene expression data. In this chapter we introduce the Genome Holography method (GH

Jacob, Eshel Ben

116

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

NASA Astrophysics Data System (ADS)

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.

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

2013-04-01

117

Technology and Computers in Music and Music Nicholas Reynolds  

E-print Network

Technology and Computers in Music and Music Education Nicholas Reynolds Melbourne Graduate School in music education literature about what the technology is but little on what the technology means in terms at musical development in different ways. Computers and technology are viewed by Webster and Hickey [9

Paris-Sud XI, Université de

118

A Brief History of Human Computer Interaction Technology  

E-print Network

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

Myers, Brad A.

119

The Intel Science and Technology Center for Cloud Computing  

E-print Network

Intel Labs The Intel Science and Technology Center for Cloud Computing Foundations for Future Clouds Abstract The Intel Science and Technology Center for cloud computing (ISTC-CC) is an open, and productivity improvements in cloud computing. White Paper Intel Labs ISTC for Cloud Computing #12;The Intel

120

Computer Science and Technology Publications. NBS Publications List 84.  

ERIC Educational Resources Information Center

This bibliography lists publications of the Institute for Computer Sciences and Technology of the National Bureau of Standards. Publications are listed by subject in the areas of computer security, computer networking, and automation technology. Sections list publications of: (1) current Federal Information Processing Standards; (2) computer…

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

121

Holography and Kinect Tom Groentjes, Leiden University  

E-print Network

Holography and Kinect Tom Groentjes, Leiden University January 31, 2013 Albert Einstein: "Reality changing the illusion of the floating object above the mirascope. Keywords Holography, Mirascope, Illusion

Emmerich, Michael

122

Turbulence and Holography  

E-print Network

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.

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

2008-06-30

123

Holography and cosmology  

Microsoft Academic Search

Starting with the suggestion of Fischler and Susskind, various attempts have recently been made to apply the holographic principle to cosmology. Among these is a generalisation by Bousso which avoids the difficulties of the original proposal in the re-collapsing FLRW models.Here we take a closer look at the question of holography in cosmology with particular reference to this generalisation. We

Reza Tavakol; George Ellis

1999-01-01

124

CCT: Center for Computation & TechnologyCCT: Center for Computation & Technology Shantenu Jha12*  

E-print Network

different systems? (ALI) #12;CCT: Center for Computation & Technology Copy a File: Globus GASS if (source_url.scheme_type == GLOBUS_URL_SCHEME_GSIFTP || source_url.scheme_type == GLOBUS_URL_SCHEME_FTP ) { globus { globus_gass_transfer_requestattr_init (&source_gass_attr, source_url.scheme); globus

Wisconsin at Madison, University of

125

Ultrarealistic imaging: the future of display holography  

NASA Astrophysics Data System (ADS)

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

Bjelkhagen, Hans I.; Brotherton-Ratcliffe, David

2014-11-01

126

COMPUTER TECHNOLOGY FOR PRINTED NOTES RECOGNITION i -/I ii i .  

E-print Network

' 1 COMPUTER TECHNOLOGY FOR PRINTED NOTES RECOGNITION ..2 , ..3 , .. i - /I ii i . . i and experimental testing of computer technology for printed notes recognition are described. Technology is based. Beran, T. Macek. Recognition of printed music score. In: MLDM'99, LNAI 1715, pp. 174-179. Springer

Heermann, Dieter W.

127

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

NASA Technical Reports Server (NTRS)

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

VanDalsem, William R.

2003-01-01

128

Roadmap: Technical and Applied Studies Computer Technology Internet/Multimedia  

E-print Network

Roadmap: Technical and Applied Studies ­ Computer Technology Internet/Multimedia ­ Bachelor Multimedia Development Tools 3 C COMT 36318 Survey of Information Security, Internet Fraud and Computer and minimum 39 upper-division credit hours #12;Roadmap: Technical and Applied Studies ­ Computer Technology

Sheridan, Scott

129

High-density recording storage system by Collinear holography  

NASA Astrophysics Data System (ADS)

Collinear TM Holography, proposed and demonstrated by OPTWARE Corporation, can produce a small, practical holographic versatile disc (HVD TM) drive system more easily than conventional 2-axis holography. With Collinear TM technologies' unique configuration the optical pickup can be designed as small as DVDs, and can be placed on one side of the recording media. As servo technology is being introduced to control the objective lens to be maintained precisely to the disc in the recording and the reconstructing process, a vibration isolator is no longer necessary. Experimental and theoretical studies suggest that the holographic material is very effective in increasing the recording density of the system. A high density data recording of Collinear TM Holography by reducing optical noise is also demonstrated.

Horimai, Hideyoshi; Tan, Xiaodi; Aoki, Yoshio

2006-04-01

130

Spatially incoherent single channel digital Fourier holography  

E-print Network

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

Rosen, Joseph

131

hal00265902, Digital holography with ultimate sensitivity  

E-print Network

hal­00265902, version 1 ­ 20 Mar 2008 Digital holography with ultimate sensitivity M. Gross and M of the heterodyne holography scheme, which combines the properties of o#11;-axis and phase-shifting holography of photons. Digital holography is a fast-growing research #12;eld that has drawn increasing attention [1

Paris-Sud XI, Université de

132

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

133

Digital Holography Display (2)  

NASA Astrophysics Data System (ADS)

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

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

134

Trinidad Carnival : improving design through computation and digital technology  

E-print Network

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

Noel, Vernelle A. A. (Vernelle Aletia)

2013-01-01

135

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

136

Laboratory for Computational Cultural Dynamics: Using Technology to Understand Culture  

E-print Network

Laboratory for Computational Cultural Dynamics: Using Technology to Understand Culture Can Internet search algorithms predict political violence? Can computer modeling accurately replicate culturally influenced patterns of behavior? How can we make virtual cultural training more realistic for our diplomats

Hill, Wendell T.

137

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

ERIC Educational Resources Information Center

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)

Simon, Herbert A.

1987-01-01

138

An Assessment of Scientific Computing Technology 1991-2001  

SciTech Connect

This report discusses the future computing technology at Argonne National Laboratory. Some of the areas covered are: computational science needs: the grand challenges; scientific computing hardware; software: languages and tools; fortran and compilers for parallel computers; networking and communications; and scientific visualization.

Mueller, C.J.; Amiot, L.W.; Canfield, T.R.; Caruthers, C.M.; Kuhfuss, T.C.; Lusk, E.L.; McMahon, R.J.; Malon, D.M.; Minkoff, M.; Moszur, F.M.; Padua, D.A.; Plaskacz, E.J.; Rowlan, J.; Stevens, R.L.; Volmer, J.A.

1991-02-01

139

Computational technology for high-temperature aerospace structures  

NASA Astrophysics Data System (ADS)

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.

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

140

Computational technology for high-temperature aerospace structures  

NASA Technical Reports Server (NTRS)

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.

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

1992-01-01

141

Digital holography to light field  

NASA Astrophysics Data System (ADS)

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

Asundi, Anand; Zuo, Chao

2014-05-01

142

Gravitational wave holography  

E-print Network

We represent and discuss a theory of gravitational holography in which all the involved waves; subject, reference and illuminator are gravitational waves (GW). Although these waves are so weak that no terrestrial experimental set-ups, even the large LIGO, VIRGO, GEO and TAMA facilities, were able up to now to directly detect them they are, nevertheless, known under certain conditions (such as very small wavelengths) to be almost indistinguishable (see P. 962 in Ref. \\cite{mtw}) from their analogue electromagnetic waves (EMW). We, therefore theoretically, show, using the known methods of optical holography and taking into account the very peculiar nature of GW, that it is also possible to reconstruct subject gravitational waves.

D. Bar

2005-09-14

143

Pre-Holography  

E-print Network

We construct a symplectic isomorphism, h, from classical Klein Gordon solutions of mass m on (d+1)-dimensional Lorentzian Anti de Sitter space (equipped with the usual symplectic form) to a certain symplectic space of functions on its conformal boundary (only) for all integer and half-integer Delta (= d/2 + (1/2)(d^2 + 4m^2)^{1/2}). h induces a large family of new examples of Rehren's algebraic holography in which the net of local quantum Klein Gordon algebras in AdS is seen to map to a suitably defined net of local algebras for the (generalized free) scalar conformal field with anomalous dimension Delta on d-dimensional Minkowski space (the AdS boundary). Relatedly, we show for these models that Bertola et al's boundary-limit holography becomes a quantum duality (only) if the test functions for boundary Wightman distributions are restricted in a particular way.

Bernard S. Kay; Peter Larkin

2007-08-09

144

Holography: science and art  

NASA Astrophysics Data System (ADS)

Art and science are separated by a very large distance nowadays. Long ago, e.g. in Renaissance, or even earlier, in classic Greece and Rome, or still earlier in Egypt or Mesopotamia, arts and sciences were united. Today they seem to go separate paths: science for the industry, arts for the gallery. Holography is an exception: no art without science, but also no science without art.

Boone, Pierre M.

1998-09-01

145

Computer-aided design and computer science technology  

NASA Technical Reports Server (NTRS)

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.

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

1976-01-01

146

Dynamic imaging through turbid media based on digital holography.  

PubMed

Imaging through turbid media using visible or IR light instead of harmful x ray is still a challenging problem, especially in dynamic imaging. A method of dynamic imaging through turbid media using digital holography is presented. In order to match the coherence length between the dynamic object wave and the reference wave, a cw laser is used. To solve the problem of difficult focusing in imaging through turbid media, an autofocus technology is applied. To further enhance the image contrast, a spatial filtering technique is used. A description of digital holography and experiments of imaging the objects hidden in turbid media are presented. The experimental result shows that dynamic images of the objects can be achieved by the use of digital holography. PMID:24690643

Li, Shiping; Zhong, Jingang

2014-03-01

147

Cloud Computing. Technology Briefing. Number 1  

ERIC Educational Resources Information Center

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

Alberta Education, 2013

2013-01-01

148

Helsinki University of Technology Dissertations in Computer and Information Science  

E-print Network

, Dissertations in Computer and Information Science, Report D7, Espoo, Finland. Keywords: clustering, data mining, Finland) on the 17th of November, 2004, at 2 o'clock p.m. Helsinki University of Technology Department FINLAND #12;Distribution: Helsinki University of Technology Laboratory of Computer and Information Science

Kaski, Samuel

149

Page 1 of 4 Michigan Technological University Computer Use Policy  

E-print Network

Page 1 of 4 Michigan Technological University Computer Use Policy Developed by Michigan Tech of Interest and Intellectual Property policy and procedure. Use of Michigan Technological University a violation of University rules, certain computer misconduct is prohibited under Michigan Laws. Act 53

150

Advanced cooling technology for leading-edge computer products  

Microsoft Academic Search

Cooling technology has been a vital prerequisite for the rapid and continued advancement of computer products, ranging from lap-tops to supercomputers. This paper provides a review of the recent development of cooling technology for computers. Both air cooling and liquid cooling are included. Air cooling is discussed in terms of the advantages of impinging flow. An example of module internal

R. C. Chu

1998-01-01

151

No Silver Bullet : Inherent Limitations of Computer Security Technologies  

Microsoft Academic Search

Awareness of the need for secure systems has grown rapidly as computers have become increasingly pervasive in our society. Numerous computer security technologies have been proposed and implemented, but all of them fall short of providing the level of security most organizations and end- users expect. No current technology, whether used in isolation or used together with other measures, fully

Jeffrey W. Humphries; Daniel J. Ragsdale; Curtis A. Carver

2000-01-01

152

Noise estimation for off-axis electron holography.  

PubMed

Off-axis electron holography provides access to the phase of the elastically scattered wave in a transmission electron microscope at scales ranging from several hundreds of nanometres down to 0.1nm. In many cases the reconstructed phase shift is directly proportional to projected electric and magnetic potentials rendering electron holography a useful and established characterisation method for materials science. However, quantitative interpretation of experimental phase shifts requires quantitative knowledge about the noise, which has been previously established for some limiting cases only. Here, we present a general noise transfer formalism for off-axis electron holography allowing to compute the covariance (noise) of reconstructed amplitude and phase from characteristic detector functions and general properties of the reconstruction process. Experimentally, we verify the presented noise transfer formulas for two different cameras with and without objects within the errors given by the experimental noise determination. PMID:24821224

Röder, Falk; Lubk, Axel; Wolf, Daniel; Niermann, Tore

2014-09-01

153

Computer Science and Information Technology Gateways and Resources  

NSDL National Science Digital Library

The Computer Science and Information Technology Gateways and Resources collection is comprised of web portals, web sites, and resources in many areas including algorithms and data structures, operating systems and programming languages, software engineering, artificial intelligence, information science, digital-library technologies, and others. Here may be found materials for educators and learners, resources intended for the general public, and materials aimed at research communities devoted to computer science and information technology.

2008-03-14

154

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

E-print Network

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

Sheridan, Scott

155

CICT Computing, Information, and Communications Technology Program  

NASA Technical Reports Server (NTRS)

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.

Laufenberg, Lawrence; Tu, Eugene (Technical Monitor)

2002-01-01

156

Mistaking Computers for Technology: Technology Literacy and the Digital Divide  

ERIC Educational Resources Information Center

No other information and communication technology has swept the globe with greater speed than the Internet, having the potential to promote vast social, economic, and political transformations. As new technologies become available the pattern of adoption and diffusion creates disparities in access and ownership. At the most basic this gap is…

Amiel, Tel

2006-01-01

157

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

E-print Network

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

Lightsey, Glenn

158

Technology and society: ideological implications of information and computer technologies in the Soviet Union  

SciTech Connect

This study examines the impact of technology on the USSR's social system from the perspective of Soviet ideological development. The analysis of information and computer technologies within this framework de-emphasizes both modernization theories and those that assume unchallenged Communist Party control over technological development. Previous studies have examined the level of Soviet technological achievements and the gap between this level and those in the West, many referring to ideological boundaries of Soviet technological development without, however, systematically analyzing the resulting implications for the Soviet ideology of Marxism-Leninism. This study develops a framework for analyzing the impact of new technologies in the USSR in the fields of technology, ideology, and the scientific and technological revolution. On the basis of this framework, examination turns to the relevant Soviet theoretical and technical literature and debates among Soviety elites, concluding that the introduction of information and computer technologies and the organization of computer networks has exacerbated tensions in Soviety Marxism-Leninism.

Weigle, M.A.

1988-01-01

159

Analysis of Virtualization Technologies for High Performance Computing Environments  

E-print Network

,henschel,jatbrown,gvonlasz,xqiu,gcf}@indiana.edu Abstract--As Cloud computing emerges as a dominant paradigm in distributed systems, it is important with their own advantages and disadvantages. This manuscript provides an in-depth analysis of some of today. INTRODUCTION Cloud computing [1] is one of the most explosively expand- ing technologies in the computing

160

Emerging Models and Technologies for Computation (EMT) Program Solicitation  

E-print Network

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

Mazumder, Pinaki

161

Computers as Cognitive Tools: Learning with Technology, Not from Technology.  

ERIC Educational Resources Information Center

Cognitive tools, computer-based applications normally used as productivity software, can also function as knowledge representation formalisms that require learners to think critically. Databases, spreadsheets, semantic networks, expert systems, and multimedia/hypermedia construction can function as computer-based cognitive tools to expand student…

Jonassen, David H.

1995-01-01

162

Split-illumination electron holography  

SciTech Connect

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.

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

163

Strong Coupling Holography  

E-print Network

We show that whenever a 4-dimensional theory with N particle species emerges as a consistent low energy description of a 3-brane embedded in an asymptotically-flat (4+d)-dimensional space, the holographic scale of high-dimensional gravity sets the strong coupling scale of the 4D theory. This connection persists in the limit in which gravity can be consistently decoupled. We demonstrate this effect for orbifold planes, as well as for the solitonic branes and string theoretic D-branes. In all cases the emergence of a 4D strong coupling scale from bulk holography is a persistent phenomenon. The effect turns out to be insensitive even to such extreme deformations of the brane action that seemingly shield 4D theory from the bulk gravity effects. A well understood example of such deformation is given by large 4D Einstein term in the 3-brane action, which is known to suppress the strength of 5D gravity at short distances and change the 5D Newton's law into the four-dimensional one. Nevertheless, we observe that the scale at which the scalar polarization of an effective 4D-graviton becomes strongly coupled is again set by the bulk holographic scale. The effect persist in the gravity decoupling limit, when the full theory reduces to a 4D system in which the only memory about the high-dimensional holography is encoded in the strong coupling scale. The observed intrinsic connection between the high-dimensional flat space holography and 4D strong coupling suggests a possible guideline for generalization of AdS/CFT duality to other systems.

Gia Dvali; Cesar Gomez

2009-07-18

164

Computer Technology Integration and Student Learning: Barriers and Promise  

NASA Astrophysics Data System (ADS)

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, there is still concern about instructional integration of computer technology to support student learning. Appropriate integration of computer tools constitutes a major change in people's lives; technology integration is a complex phenomenon that involves understanding teachers' motivations, perceptions, and beliefs about learning and technology (Woodbridge, http://www.techlearning.com/story/showArticle.php?articleID=17701367). Although computer technology has a great potential to reform or even transform education, barriers come in the way of achieving success especially with student learning. This paper presents an overview of technology use in education with a focus on barriers to computer technology integration. Further, this paper provides suggestions to maximize the benefits of learning with computer technology.

Keengwe, Jared; Onchwari, Grace; Wachira, Patrick

2008-12-01

165

Active terahertz holography  

NASA Astrophysics Data System (ADS)

We present a novel technology to dynamically control the wave front of the terahertz (THz) beam with photo-generated carriers. The computer generated hologram is projected onto a silicon wafer by a conventional optical spatial light modulator. The photo-generated carriers on the silicon surface will from a hologram to modulate the wave front of the input THz beam. Some special field distributions and vortex beams are generated using this method. This technology is broadband, structure free, tunable, and all-optical controllable. It will provide numerous possible applications in future THz imaging and communication systems.

Xie, Zhenwei; Wang, Xinke; Zhang, Yan

2013-12-01

166

Forbidden Landscape from Holography  

E-print Network

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

Yu Nakayama

2009-07-01

167

DSN Microwave Antenna Holography  

NASA Technical Reports Server (NTRS)

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.

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

1984-01-01

168

Transformational volume holography.  

PubMed

We analyze the bulk elastic transformation of volume holograms as a general approach for three-dimensional pupil engineering. The physical relationship between transformation and the resulting point spread function is discussed by deriving the corresponding analytical expressions. For affine transformations, an analytical solution is directly possible. However, for nonaffine transformations, the analytical solution is not straightforward and we must turn to quasi-analytical solutions using the approximation of the stationary phase. Transformational volume holography offers richer design flexibility and real-time adjustment capabilities for imaging systems. PMID:25401442

Gao, Hanhong; Barbastathis, George

2014-09-01

169

Holography constrains quantum bounce  

E-print Network

Recent work in quantum loop cosmology suggests the universe undergoes a bounce when evolving from a previous collapsing phase. However, with non-inflationary matter sources, the scenario appears to strongly violate the holography bound S\\leq A/4 during the bounce, where A now represents the cross-sectional area of the bounce. We also give a simple argument why any inflationary phase after the bounce is unlikely due to prior dissipation of a scalar field kinetic energy phase into regular matter components.

D. H. Coule

2008-02-13

170

Pulsed electron holography  

NASA Astrophysics Data System (ADS)

A technique of pulsed low-energy electron holography is introduced, which allows for recording highly resolved holograms within reduced exposure times. Therefore, stacks of holograms are accumulated in a pulsed mode with individual acquisition times as short as 50 ?s. Subsequently, these holograms are aligned and finally superimposed. The resulting holographic record reveals previously latent high-order interference fringes and thereby pushing interference resolution into the sub-nanometer regime. In view of the non-damaging character of low-energy electrons, the method is of particular interest for structural analysis of fragile biomolecules.

Germann, Matthias; Latychevskaia, Tatiana; Escher, Conrad; Fink, Hans-Werner

2013-05-01

171

Dyonic Stars for Holography  

E-print Network

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

Carney, Daniel

2015-01-01

172

Large-format holography  

NASA Astrophysics Data System (ADS)

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.

Ratcliffe, David

1998-02-01

173

Multi-field inflation from holography  

NASA Astrophysics Data System (ADS)

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.

Garriga, Jaume; Skenderis, Kostas; Urakawa, Yuko

2015-01-01

174

Multi-field inflation from holography  

E-print Network

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.

Garriga, Jaume; Urakawa, Yuko

2014-01-01

175

Multi-field inflation from holography  

E-print Network

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.

Jaume Garriga; Kostas Skenderis; Yuko Urakawa

2014-10-13

176

Art of color holography: pioneers in change  

NASA Astrophysics Data System (ADS)

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.

Richardson, Martin J.; Bjelkhagen, Hans I.

2000-10-01

177

The Future of Children: Children and Computer Technology  

NSDL National Science Digital Library

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

178

Evolving technologies for Space Station Freedom computer-based workstations  

NASA Technical Reports Server (NTRS)

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.

Jensen, Dean G.; Rudisill, Marianne

1990-01-01

179

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

E-print Network

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

Schaefer, Marcus

180

Holography Experiments on Optical Imaging.  

ERIC Educational Resources Information Center

Describes experiments intended to produce a better understanding of the holographic method of producing images and optical imaging by other optical systems. Application of holography to teaching physics courses is considered. (Author/SA)

Bonczak, B.; Dabrowski, J.

1979-01-01

181

Cutting Technology Costs with Refurbished Computers  

ERIC Educational Resources Information Center

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

Dessoff, Alan

2010-01-01

182

Pre-holography  

SciTech Connect

We construct a symplectic isomorphism h from classical Klein Gordon solutions of mass m on (d+1)-dimensional Lorentzian anti-de Sitter space (equipped with the usual symplectic form) to a certain symplectic space of functions on its conformal boundary (only) for all integer and half-integer {delta} (=(d/2)+(1/2)(d{sup 2}+4m{sup 2}){sup 1/2}). h induces a large family of new examples of Rehren's algebraic holography in which the net of local quantum Klein Gordon algebras in AdS is seen to map to a suitably defined net of local algebras for the (generalized free) scalar conformal field with anomalous dimension {delta} on d-dimensional Minkowski space (the AdS boundary). Relatedly, we show for these models that Bertola et al.'s boundary-limit holography becomes a quantum duality (only) if the test functions for boundary Wightman distributions are restricted in a particular way.

Kay, Bernard S.; Larkin, Peter [Department of Mathematics, University of York, York YO10 5DD (United Kingdom)

2008-06-15

183

Black holes and holography  

E-print Network

The idea of holography in gravity arose from the fact that the entropy of black holes is given by their surface area. The holography encountered in gauge/gravity duality has no such relation however; the boundary surface can be placed at an arbitrary location in AdS space and its area does not give the entropy of the bulk. The essential issues are also different between the two cases: in black holes we get Hawking radiation from the `holographic surface' which leads to the information issue, while in gauge/gravity duality there is no such radiation from the boundary surface. To resolve the information paradox we need to show that there are real degrees of freedom at the horizon of the hole; this is achieved by the fuzzball construction. While the fuzzball has no interior to the horizon, we argue that an auxiliary spacetime can be constructed to continue the collective dynamics of fuzzball for times of order the crossing time; this is an analogue of `complementarity'.

Samir D. Mathur

2012-07-23

184

Holography of Little Inflation  

E-print Network

For several crucial microseconds of its early history, the Universe consisted of a Quark-Gluon Plasma. As it cooled during this era, it traced out a trajectory in the quark matter phase diagram. The form taken by this trajectory is not known with certainty, but is of great importance: it determines, for example, whether the cosmic plasma passed through a first-order phase change during the transition to the hadron era, as has recently been suggested by advocates of the "Little Inflation" model. Just before this transition, the plasma was strongly coupled and therefore can be studied by holographic techniques. We show that holography imposes a strong constraint (taking the form of a bound on the baryonic chemical potential relative to the temperature) on the domain through which the cosmic plasma could pass as it cooled, with important consequences for Little Inflation. In fact, we find that holography applied to Little Inflation implies that the cosmic plasma must have passed quite close to the quark matter c...

McInnes, Brett

2015-01-01

185

Atomic resolution holography.  

PubMed

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

Hayashi, Kouichi

2014-11-01

186

Reviews of computing technology: Software overview  

SciTech Connect

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

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

1994-01-05

187

Theories of Learning and Computer-Mediated Instructional Technologies.  

ERIC Educational Resources Information Center

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

Hung, David

2001-01-01

188

Using Computer Technology To Foster Learning for Understanding.  

ERIC Educational Resources Information Center

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)

Van Melle, Elaine; Tomalty, Lewis

2000-01-01

189

Emerging Trends in Technology Education Computer Applications.  

ERIC Educational Resources Information Center

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)

Hazari, Sunil I.

1993-01-01

190

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

Code of Federal Regulations, 2013 CFR

... 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...

2013-04-01

191

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

Code of Federal Regulations, 2010 CFR

... 2010-04-01 false Electronic, computer or other technologic aid. 502.7 Section...THIS CHAPTER § 502.7 Electronic, computer or other technologic aid. (a) Electronic, computer or other technologic aid means any...

2010-04-01

192

Algebraic Holography K.H. Rehren  

E-print Network

Algebraic Holography K.­H. Rehren Institut f¨ur Theoretische Physik, Universit¨at G (so­called ``holography'') [13, 18] between quantum field theories on 1+s­dimensional anti]. Thus, holography is expected to give an important clue for the understanding of quantum theory

193

Holography and Liquid Crystal Wilder Iglesias  

E-print Network

Holography and Liquid Crystal Wilder Iglesias Dr. Peter Palffy-Muhoray #12;Outline · Introduction storage using PDLC #12;Introduction and History of Holograms · Holography (from the Greek, -hòlòs whole. · Photography and holography differ from quantity of information that they get from the light beam. Photography

Palffy-Muhoray, Peter

194

Mathematical refocusing of images in electronic holography  

SciTech Connect

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.

Stetson, Karl A.

2009-07-01

195

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

196

Digital spatially incoherent Fresnel holography Joseph Rosen*  

E-print Network

Digital spatially incoherent Fresnel holography Joseph Rosen* Department of Biology, Integrated such as outdoor and astronomical holography1 and fluorescence holographic micro- scopy.2 The oldest methods images from dif- ferent view angles. Another method is called scanning holography,2,12 in which a pattern

Rosen, Joseph

197

HELIOSEISMIC HOLOGRAPHY OF ACTIVE-REGION SUBPHOTOSPHERES  

E-print Network

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

Braun, Douglas C.

198

Reconstruction guarantees for compressive tomographic holography  

E-print Network

Reconstruction guarantees for compressive tomographic holography Yair Rivenson,1, * Adrian Stern,2 of the recording setup. © 2013 Optical Society of America OCIS codes: (090.1995) Digital holography; (070 is one of the biggest advantages of digital holography, enabling a single-shot object acquisition rather

Rosen, Joseph

199

NEARFIELD STRUCTUREBORNE SOUND HOLOGRAPHY M. Cavallari1*  

E-print Network

007 - 1 NEARFIELD STRUCTURE­BORNE SOUND HOLOGRAPHY M. Cavallari1* , H. A. Bonhoff2 and B. A. T.a.t.petersson@tu-berlin.de ABSTRACT In conjunction with inverse problems, nearfield acoustical holography can be used to predict of the present work is at developing a theoretical platform for nearfield structure- borne sound holography

Berlin,Technische Universität

200

Analysis of Virtualization Technologies for High Performance Computing Environments  

Microsoft Academic Search

As Cloud computing emerges as a dominant paradigm in distributed systems, it is important to fully under- stand the underlying technologies that make Clouds possible. One technology, and perhaps the most important, is virtualization. Recently virtualization, through the use of hypervisors, has become widely used and well understood by many. However, there are a large spread of different hypervisors, each

Andrew J. Younge; Robert Henschel; James T. Brown; Gregor von Laszewski; Judy Qiu; Geoffrey C. Fox

2011-01-01

201

Computed Tomography Technology: Development and Applications for Defence  

SciTech Connect

Computed Tomography(CT) has revolutionized the field of Non-Destructive Testing and Evaluation (NDT and E). Tomography for industrial applications warrants design and development of customized solutions catering to specific visualization requirements. Present paper highlights Tomography Technology Solutions implemented at Defence Laboratory, Jodhpur (DLJ). Details on the technological developments carried out and their utilization for various Defence applications has been covered.

Baheti, G. L.; Saxena, Nisheet; Tripathi, D. K.; Songara, K. C.; Meghwal, L. R.; Meena, V. L. [Defence Research and Development Organization, Defence Laboratory, Jodhpur-342011 (India)

2008-09-26

202

Visual Impairments. Tech Use Guide: Using Computer Technology.  

ERIC Educational Resources Information Center

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…

Carr, Annette

203

Video and Computer Technologies for Extended-Campus Programming.  

ERIC Educational Resources Information Center

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

Sagan, Edgar L.; And Others

204

Factors Influencing Cloud-Computing Technology Adoption in Developing Countries  

ERIC Educational Resources Information Center

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…

Hailu, Alemayehu

2012-01-01

205

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

ERIC Educational Resources Information Center

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

Bers, Marina Umaschi

2010-01-01

206

Feasibility of microwave holography for imaging the sea surface  

NASA Technical Reports Server (NTRS)

The possibility of imaging the sea surface in three dimensions by means of microwave holography from a low-flying aircraft is considered. Data cover a brief feasibility study and a review of some computer experiments in which it was demonstrated that it is possible to compute three-dimensional images of objects from raw holographic data recorded on magnetic tape. These experiments used synthetic data.

Wells, W.

1972-01-01

207

Computers and terminals as an aid to international technology transfer  

NASA Technical Reports Server (NTRS)

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.

Sweeney, W. T.

1974-01-01

208

Gordon and Mike's ICT Podcast: Cloud Computing Technologies  

NSDL National Science Digital Library

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

Qaissaunee, Michael

2010-05-08

209

Analysis of Virtualization Technologies for High Performance Computing Environments  

E-print Network

,henschel,jatbrown,gvonlasz,xqiu,gcf}@indiana.edu Abstract--As Cloud computing emerges as a dominant paradigm in distributed systems, it is important with their own advantages and disadvantages. This paper provides an in-depth analysis of some of today's commonly infrastructure. I. INTRODUCTION Cloud computing [1] is one of the most explosively expand- ing technologies

210

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

ERIC Educational Resources Information Center

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

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

2010-01-01

211

Computer-Integrated Manufacturing Technology. Tech Prep Competency Profile.  

ERIC Educational Resources Information Center

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…

Lakeland Tech Prep Consortium, Kirtland, OH.

212

Illinois Institute of Technology Department of Electrical and Computer Engineering  

E-print Network

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

Saniie, Jafar

213

Computer-Free Technology...Seeing Is Believing.  

ERIC Educational Resources Information Center

Compact disk-interactive (CD-i) offers high technology learning without computers. CD-i machines work like a VCR, combining video images with interactive aspects of playing a computer game. The paper explains how classes can use CD-i, how to learn and use CD-i, why teachers like CD-i, and what the costs are. (SM)

Winter, Ruth

1995-01-01

214

SOE Computing Support Provided by Information Technology Services (ITS)  

E-print Network

· Baskin Engineering Room 316 ­ Grad Computing Lab 8 each of Windows XP, Mac OS X · Engineering 2 Room 201 on for maintenance / updates We DO monitor systems and network ports! Technical Support Staff implement policySOE Computing Support Provided by Information Technology Services (ITS) ITS - SOE Local Services

Karplus, Kevin

215

The Personal Computer at Stevens Institute of Technology.  

ERIC Educational Resources Information Center

In September 1983 Stevens Institute of Technology (SIT) began a program requiring every incoming student to own a Digital Equipment Corporation PC-350 microcomputer. Past computing experiences at SIT, impact of the program, software and hardware considerations, and computing experiences in chemistry are reviewed. (JN)

van der Veen, James M.

1984-01-01

216

IPv6 MANET: An Essential Technology for Future Pervasive Computing  

Microsoft Academic Search

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

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

2010-01-01

217

Forest-Based Translation Institute of Computing Technology  

E-print Network

Forest-Based Translation Haitao Mi Institute of Computing Technology Qun Liu Institute of Computing of Pennsylvania #12;Forest-based Translation Two Approaches in Syntax MT 2 #12;Forest-based Translation Two · with a synchronous grammar · generate translations accordingly 2 #12;Forest-based Translation Two Approaches

Plotkin, Joshua B.

218

Computers and Telecommunications at National Technological University.  

ERIC Educational Resources Information Center

The National Technological University (NTU), a consortium of approximately 30 American engineering schools which has been in operation on a continent-wide scale since 1985, uses telecommunications to broadcast engineering education courses to corporate sites across the country. Courses are produced at member institutions and are distributed to…

Mays, M. E.; Lumsden, D. Barry

219

Impact of Computer Technology on Library Expansions.  

ERIC Educational Resources Information Center

Describes the impact of information technology on the physical and functional organization of libraries and briefly discusses technical issues, including wiring and distribution, access to power sources, codes, lighting, and security. The Duke University Library and the Purcellville (VA) public library's renovation and expansion plans are…

Fisher, Tom

1995-01-01

220

CACTUS: Calculator and Computer Technology User Service.  

ERIC Educational Resources Information Center

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

Hyde, Hartley

1998-01-01

221

Using Interactive Computer Technology to Enhance Learning  

ERIC Educational Resources Information Center

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

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

2006-01-01

222

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

ERIC Educational Resources Information Center

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

Ruthberg, Zella G.

223

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

E-print Network

Why Biomedical Computing? Computer-assisted medical imaging technology plays a cru- cial role of biomedical imaging and computer-assisted interventions. Besides the courses designed specifically in modern clinical environments, as medical diag- nosis and treatment are increasingly supported by imaging

Cengarle, María Victoria

224

Non-relativistic holography  

E-print Network

We consider holography for d-dimensional scale invariant but non-Lorentz invariant field theories, which do not admit the full Schrodinger symmetry group. We find new realizations of the corresponding (d+1)-dimensional gravity duals, engineered with a variety of matter Lagrangians, and their finite temperature generalizations. The thermodynamic properties of the finite temperature backgrounds are precisely those expected for anisotropic, scale invariant field theories. The brane and string theory realizations of such backgrounds are briefly discussed, along with their holographic interpretation in terms of marginal but non Lorentz invariant deformations of conformal field theories. We initiate discussion of holographic renormalization in these backgrounds, and note that such systematic renormalization is necessary to obtain the correct behavior of correlation functions.

Marika Taylor

2008-12-02

225

Microwave antenna holography  

NASA Technical Reports Server (NTRS)

This microwave holography technique utilizes the Fourier transform relation between the complex far field radiation pattern of an antenna and the complex aperture field distribution. Resulting aperture phase and amplitude distribution data can be used to precisely characterize various crucial performance parameters, including panel alignment, panel shaping, subreflector position, antenna aperture illumination, directivity at various frequencies, and gravity deformation effects. The methodology of data processing presented here was successfully applied to the Deep Space Network (DSN) 34-m beam waveguide antennas. The antenna performance was improved at all operating frequencies by reducing the main reflector mechanical surface rms error to 0.43 mm. At Ka-band (32 GHz), the estimated improvement is 4.1 dB, resulting in an aperture efficiency of 52 percent. The performance improvement was verified by efficiency measurements and additional holographic measurements.

Rochblatt, David J.; Seidel, Boris L.

1992-01-01

226

Diffusion of innovation: computer technology in hospital pharmacy.  

PubMed

The diffusion of computer technology in hospital pharmacy departments was studied by surveying pharmacy directors in a randomly selected sample of 501 hospitals in the United States with at least 100 beds. Pharmacy directors were asked to indicate for which of 17 tasks a computer or memory typewriter was used in the pharmacy department. The time of first adopting computers in the department was compared with the predicted S adoption curve; adoption time was also correlated with characteristics of the hospital, pharmacy, and pharmacy director. Of the 417 respondents, 308 reported use of a memory typewriter or computer in the pharmacy. Fifty-one directors reported only memory-typewriter use, and 94 reported both computer and memory-typewriter use. Maintenance of patient census lists and patient billing were the most frequent uses of computers. The primary uses of memory typewriters were preparation of letters and labels. There was no significant difference in the actual and predicted S curves for time of adoption of computers. The number of months since first adopting computers was positively correlated with hospital bed size and the pharmacy director's number of years as a pharmacist, years in current position and with current employer, and number of subordinates; it was also positively correlated with number of pharmaceutical services and number of computer uses in the department. Computer technology is becoming more universally accepted in hospital pharmacy, and research on the diffusion of innovations suggests that acceptance will continue to increase. PMID:6507435

Browning, W C; Hurd, P D; Bootman, J L; Tansik, D A; McGhan, W F

1984-11-01

227

Absolute shape measurements using high-resolution optoelectronic holography methods  

E-print Network

Absolute shape measurements using high- resolution optoelectronic holography methods Cosme Furlong optoelectronic holography (OEH) methodology is described. This description addresses apparatus and analysis holography; shape and deformation measurements; surface tiling. Paper SM-26 received July 30, 1999; revised

Furlong, Cosme

228

The change in critical technologies for computational physics  

NASA Technical Reports Server (NTRS)

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.

Watson, Val

1990-01-01

229

Beyond computer literacy: supporting youth's positive development through technology.  

PubMed

In a digital era in which technology plays a role in most aspects of a child's life, having the competence and confidence to use computers might be a necessary step, but not a goal in itself. Developing character traits that will serve children to use technology in a safe way to communicate and connect with others, and providing opportunities for children to make a better world through the use of their computational skills, is just as important. The Positive Technological Development framework (PTD), a natural extension of the computer literacy and the technological fluency movements that have influenced the world of educational technology, adds psychosocial, civic, and ethical components to the cognitive ones. PTD examines the developmental tasks of a child growing up in our digital era and provides a model for developing and evaluating technology-rich youth programs. The explicit goal of PTD programs is to support children in the positive uses of technology to lead more fulfilling lives and make the world a better place. This article introduces the concept of PTD and presents examples of the Zora virtual world program for young people that the author developed following this framework. PMID:21240949

Bers, Marina Umaschi

2010-01-01

230

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

E-print Network

21007 Internet Ethics and Policies or COMT 21036 Web Scripting I 3 Business Electives I 3-4 See note 1Roadmap: Computer Technology ­ Internet and Multimedia Technology ­ Associate of Applied Business Sciences (3 credit hours) 3 Note 1: Business Electives I (3-4 credit hours), choose from the following

Sheridan, Scott

231

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

ERIC Educational Resources Information Center

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

Udoh, Emmanuel E.

2010-01-01

232

Depth of focus in digital holography using spatial partially coherent light  

NASA Astrophysics Data System (ADS)

Digital holography is a powerful, but young, imaging technology that has a vast array of applications; its strength lies in the ability to numerically focus on any plane within a sample from a single hologram and to use both amplitude and phase information from the intensity field to reconstruct the sample's 3D characteristics on a computer. The quality of many holograms, however, is compromised by speckle and other interference noise associated with the high-coherence lasers often used to illuminate the sample. Speckle noise may be diminished by lowering the coherence length of the source. In our experiments, partially coherent light was created by directing a laser beam through a rotating ground glass. We aimed to discern whether the coherence of the source could be systematically altered by changing the position of the ground glass within the focused laser beam. We anticipated that altering the coherence length would also systematically change the depth of focus. Initial results support our hypotheses.

Binz, Kristen; Yu, Xiao; Clark, David; Kim, Myung K.

2012-02-01

233

Digital Holography for Three Dimensional Tomographic and Topographic Measurements.  

E-print Network

??In this work digital holography is utilized to perform three dimensional tomographic and topographic measurements. Digital holography is combined with multiple projection tomography to solve… (more)

Williams, Logan Andrew

2014-01-01

234

Electron holography and magnetic properties of exsolved synthetic titanomagnetites  

E-print Network

Electron holography and magnetic properties of exsolved synthetic titanomagnetites Church, N S nc-ulvospinel assemblages. These exsolved samples were examined using electron holography to quantitatively measure

Dunin-Borkowski, Rafal E.

235

Industrial Application Of Instant Holography  

NASA Astrophysics Data System (ADS)

The development of holographic test methods has lead to a wide industrial application. Today serial tests of aircraft tyres with holography have become routine. A large chemical company is testing their plastic materials like tanks, wheels and fans with the method of holographic interferometry. In the power engine industry turbine blades are tested holographically to find an optimal shape and to test the vibration behaviour. The automotive industry is using holographic methods' for construction optimization. The economic application of these test methods was possible by using instant holography. The principle of a new hologramrecorder is presented. The application of this equipment is shown in examples of testing materials, optimizing constructions and vibration analysis.

Schorner, J.; Rottenkolber, H.

1983-10-01

236

Real-world applications for brain-computer interface technology  

Microsoft Academic Search

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.

Melody M. Moore

2003-01-01

237

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

NASA Technical Reports Server (NTRS)

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

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

1984-01-01

238

Feasibility study of complex wavefield retrieval in off-axis acoustic holography employing an acousto-optic sensor.  

PubMed

We propose and experimentally demonstrate a new method for complex-valued wavefield retrieval in off-axis acoustic holography. The method involves use of an intensity-sensitive acousto-optic (AO) sensor, optimized for use at 3.3 MHz, to record the acoustic hologram and a computational method for reconstruction of the object wavefield. The proposed method may circumvent limitations of conventional implementations of acoustic holography and may facilitate the development of acoustic-holography-based biomedical imaging methods. PMID:21669451

Rodríguez, Guillermo López; Weber, Joshua; Sandhu, Jaswinder Singh; Anastasio, Mark A

2011-12-01

239

Ultra-realistic imaging: a new beginning for display holography  

NASA Astrophysics Data System (ADS)

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

Bjelkhagen, Hans I.; Brotherton-Ratcliffe, David

2014-02-01

240

Microwave Holography Helps Improve Performance Of Large Antennas  

NASA Technical Reports Server (NTRS)

Report describes use of microwave holography and related techniques of measurement and computation for diagnostics, analysis, and performance improvement of large microwave reflector antennas over all operating frequencies. Technique based on Fourier-transform relationship between complex far-field radiation pattern of antenna at small angles off boresight axis, and complex electromagnetic antenna aperture field distribution, as function of position, expressed in terms of equivalent surface current density.

Rochblatt, David J.

1993-01-01

241

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

NASA Technical Reports Server (NTRS)

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.

Olson, J. R.

1978-01-01

242

Colour Reflection Holography  

NASA Astrophysics Data System (ADS)

Available from UMI in association with The British Library. Requires signed TDF. The fidelity of colour reproduction achievable in reflection holograms is analysed by an in depth experimental and theoretical treatment. The experimental work consists of a comparison of materials and development of techniques for producing colour reflection holograms. Colour reflection holograms were recorded using a suitable material and various types of three-band laser illumination. Holograms recorded with the combinations 458, 529, and 633 nm or 458, 529, and 647 nm reproduced a full range of colours accurately, including yellow, dark blue, and purple images, which was impossible by previous methods. A theoretical model of the colour reproduction by holograms incorporates colour rendering analysis, effects of bandwidth, a new definition of signal to noise ratio, wavelength shifting, and colour balance. The model compares octagons formed by points on a CIE diagram corresponding to eight Munsell coloured chips when reproduced by the holographic image and when illuminated by a standard light source. Figures of merit of average vector length between image and object colours and gamut area size are considered. The theory compares well with holograms recorded of the Munsell chips using eight different sets of recording wavelengths. Holographic image colour reproduction for all possible recording wavelengths is predicted by the model. From this analysis, optimum wavelength combinations are obtained that support experimental results. In conclusion, a new definition of true colour holography is suggested that considers the quality of colour reproduction of a holographic image compared to colours viewed under normal conditions.

Hubel, Paul Matthew

1990-01-01

243

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

Microsoft Academic Search

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

Alchorn

2003-01-01

244

Journal of Computing and Information Technology -CIT 14, 2006, 1, 5364 53 Computer-Assisted Planning  

E-print Network

Journal of Computing and Information Technology - CIT 14, 2006, 1, 53­64 53 Computer caused by trauma or tumours. Also corrections of dislocated bone fragments up to the complete modeling thereof lead to a growing number of complex fractures in the cranio-maxillofacial region. A surgeon's pri

Andrzejak, Artur

245

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

ERIC Educational Resources Information Center

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…

Yakin, Ilker, Sumuer, Evren

2007-01-01

246

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

NASA Technical Reports Server (NTRS)

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

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

1973-01-01

247

Establishment of the Center for Biomedical Technology Innovation  

SciTech Connect

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.

NONE

2001-12-15

248

The pedagogy-technology interface in Computer Assisted Pronunciation Training  

Microsoft Academic Search

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

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

2002-01-01

249

Computer Technology and Student Preferences in a Nutrition Course  

ERIC Educational Resources Information Center

This study assessed learner preferences for using computer-based technology in a distance education course. A questionnaire was posted to students who had taken an undergraduate nutrition course at Athabasca University, Canada. The response rate was 57.1% (176 returned out of 308). Subjects were predominately female (93.7%) and nursing students…

Temple, Norman J.; Kemp, Wendy C.; Benson, Wendy A.

2006-01-01

250

COMPUTER MODELING (INDUSTRIAL MULTIMEDIA BRANCH, SUSTAINABLE TECHNOLOGY DIVISION, NRMRL)  

EPA Science Inventory

The Industrial Multimedia Branch of NRMRL's Sustainable Technology Division maintains a research program in modeling of industrial processes for pollution prevention applications. The purpose of this program is to develop computer software tools for the user community to self-ass...

251

Digital Television Archives Combining Computer Technology and Video  

E-print Network

Digital Television Archives | Combining Computer Technology and Video Rune Hjelsvold Department Abstract Television archives play an important in giving their users easy access to the huge amountof video of these problems. The pa- per also gives a short description of digital television archive prototype developed

252

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. ...

253

Pervasive Computing and Communication Technologies for U-Learning  

ERIC Educational Resources Information Center

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

Park, Young C.

2014-01-01

254

Computer-Assisted Foreign Language Teaching and Learning: Technological Advances  

ERIC Educational Resources Information Center

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

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

2013-01-01

255

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

NASA Technical Reports Server (NTRS)

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.

Housner, Jerry M.; Pinson, Larry D.

1993-01-01

256

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

ERIC Educational Resources Information Center

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

Lockerby, Hugh

257

EINDHOVEN UNIVERSITY OF TECHNOLOGY Department of Mathematics and Computer Science  

E-print Network

EINDHOVEN UNIVERSITY OF TECHNOLOGY Department of Mathematics and Computer Science CASA-Report 14], the density f denotes the height of a pile of soil, and g denotes the depth of an excavation, and the goal is to transport the sand into the excavation with the least amount of work. Practical applications of optimal mass

Eindhoven, Technische Universiteit

258

Computer Technology Integration and Student Learning: Barriers and Promise  

ERIC Educational Resources Information Center

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,…

Keengwe, Jared; Onchwari, Grace; Wachira, Patrick

2008-01-01

259

Computational Structures Technology for Airframes and Propulsion Systems  

SciTech Connect

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

Noor, A.K.; Housner, J.M.; Starnes, J.H. Jr.; Hopkins, D.A.; Chamis, C.C.

1992-05-01

260

Optically augmented 3-D computer: technology and architecture  

Microsoft Academic Search

In order to achieve high performance parallel computing in terms of bandwidth versus power consumption and volume, denser and faster means of implementing interconnections while minimizing power and crosstalk are required. Global interconnections can be implemented using free-space interconnect technology and can be coupled to the wafer to wafer connection system developed at Hughes Research laboratories to obtain an optoelectronic

Philippe J. Marchand; Ashok V. Krishnamoorthy; S. C. Esener; Uzi Efron

1994-01-01

261

Anisotropy in Gravity and Holography  

NASA Astrophysics Data System (ADS)

In this thesis, we examine the dynamical structure of Ho?ava-Lifshitz gravity, and investigate its relationship with holography for anisotropic systems. Ho?ava-Lifshitz gravity refers to a broad class of gravitational models that incorporate anisotropy at a fundamental level. The idea behind Ho?ava-Lifshitz gravity is to utilize ideas from the theory of dynamical critical phenomena into gravity to produce a theory of dynamical spacetime that is power-counting renormalizable, and is thus a candidate renormalizable quantum field theory of gravity. One of the most distinctive features of Ho?ava-Lifshitz gravity is that its group of symmetries consists not of the diffeomorphisms of spacetime, but instead of the group of diffeomorphisms that preserve a given foliation by spatial slices. As a result of having a smaller group of symmetries, HL gravity naturally has one more propagating degree of freedom than general relativity. The extra mode presents two possible difficulties with the theory, one relating to consistency, and the second to its viability as a phenomenological model. (1) It may destabilize the theory. (2) Phenomenologically, there are severe constraints on the existence of an extra propagating graviton polarization, as well as strong experimental constraints on the value of a parameter appearing in the dispersion relation of the extra mode. In the first part of this dissertation we show that the extra mode can be eliminated by introducing a new local symmetry which steps in and takes the place of general covariance in the anisotropic context. While the identification of the appropriate symmetry is quite subtle in the full non-linear theory, once the dust settles, the resulting theory has a spectrum which matches that of general relativity in the infrared. This goes a good way toward answering the question of how close Ho?ava-Lifshitz gravity can come to reproducing general relativity in the infrared regime. In the second part of the thesis we pursue the relationship between Ho?ava-Lifshitz gravity and holographic duals for anisotropic systems. A holographic correspondence is one that posits an equivalence between a theory of gravity on a given spacetime background and a field theory living on the "boundary" of that spacetime, which resides at infinite spatial separation from the interior. It is a non-trivial problem how to define this boundary, but in the case of relativistic boundary field theories, there is a well-known definition due to Penrose of the boundary which produces the geometric structure required to make sense of the correspondence. However, the proposed dual geometries to anisotropic quantum field theories have a Penrose boundary that is incompatible with the assumed correspondence. We generalize Penrose's approach, using concepts from Ho?ava-Lifshitz gravity, to spacetimes with anisotropic boundary conditions, thereby arriving at the concept of anisotropic conformal infinity that is compatible with the holographic correspondence in these spacetimes. We then apply this work to understanding the structure of holography for anisotropic systems in more detail. In particular, we examine the structure of divergences of a certain theory of gravity on Lifshitz space. We find, using our construction of anisotropic conformal infinity, that the appropriate geometric structure of the boundary is that of a foliated spacetime with an anisotropic metric complex. We then perform holographic renormalization in these spacetimes, yielding a computation of the divergent part of the effective action, and find that it exhibits precisely the structure of a Ho?ava-Lifshitz action. Moreover, we find that, for dynamical exponent z = 2, the logarithmic divergence gives rise to a conformal anomaly in 2+1 dimensions, whose general form is precisely that of conformal Ho?ava-Lifshitz gravity with detailed balance.

Melby-Thompson, Charles Milton

262

Dual thermoplastic holography recording system  

Microsoft Academic Search

A novel thermoplastic holography recording system is described. The system records the light intensity pattern of the hologram using only electromechanical forces. The hologram is prepared for exposure, processed, and fixed electronically by a 'dry' process within seconds. Poor recordings may be erased repeatedly until the desired hologram is obtained, and recordings can be inspected immediately. Techniques for controlling the

H. L. Umstatter; J. L. Doty; J. D. Trolinger

1985-01-01

263

Some current views on holography  

Microsoft Academic Search

Holography, the science of producing images by wavefront reconstruction, has been receiving increased attention during the past few years, chiefly because of achievements made possible by the development of the laser as a coherent light source. By holographic techniques, three-dimensional objects may be reconstructed as three-dimensional images, in full color, and magnified or reduced in size, as desired. This article

Robert J. Collier

1966-01-01

264

Holography from loop quantum gravity  

E-print Network

We show that holography arises naturally in the context of spherically symmetric loop quantum gravity. The result is not dependent on detailed assumptions about the dynamics of the theory being considered. It ties strongly the amount of information contained in a region of space to the tight mathematical underpinnings of loop quantum geometry, at least in this particular context.

Rodolfo Gambini; Jorge Pullin

2007-08-02

265

Application of holography to photoelasticity  

Microsoft Academic Search

This paper discusses the exploratory application of holography to photoelasticity. It is shown that the two-beam holographic method may be used to record the birefringent pattern of a standard two-dimensional photoelastic specimen. A special type of polariscope is required. A discussion is presented of the various arrangements required to produce isochromatic, isoclinic, isopachic and combined isopachic and isochromatic fringe patterns.

M. E. Fourney

1968-01-01

266

Wormholes and entanglement in holography  

E-print Network

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

Kristan Jensen; Julian Sonner

2014-05-19

267

Remote metrology by comparative digital holography  

SciTech Connect

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

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

2006-02-10

268

Holography of 3D flat cosmological horizons.  

PubMed

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

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

2013-04-01

269

Phase-shifting color digital holography  

NASA Astrophysics Data System (ADS)

Digital holography with a three-wavelength laser and a color CCD has been demonstrated. With the phase shifting of the reference beam, in-line holograms for three wavelengths are recorded simultaneously for derivation of the complex amplitude at each wavelength, and then the three monochromatic images are reconstructed and combined into full-color images in the computer. Laser power variation for wavelengths can be compensated for in the reconstruction process. We have compared the images reconstructed by two algorithms using a single Fourier transformation and a convolution with each other by both experiments and numerical simulations. Phase-shifting errors arising at two of the three wavelengths have proved not to cause serious deterioration of the reconstructed images.

Yamaguchi, Ichirou; Matsumura, Tatsuki; Kato, Jun-ichi

2002-07-01

270

Report of the Panel on Computer and Information Technology  

NASA Technical Reports Server (NTRS)

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.

Lundstrom, Stephen F.; Larsen, Ronald L.

1984-01-01

271

Exploring shot noise and Laser Doppler imagery with heterodyne holography  

E-print Network

Exploring shot noise and Laser Doppler imagery with heterodyne holography (Invited Paper) Michel) Email: atlan@optique.espci.fr Abstract--Heterodyne Holography is a variant of Digital Holography, where. Heterodyne Holography is an extremely versatile and reliable holographic technique, which is able the reach

Paris-Sud XI, Université de

272

Computational structures technology and UVA Center for CST  

NASA Technical Reports Server (NTRS)

Rapid advances in computer hardware have had a profound effect on various engineering and mechanics disciplines, including the materials, structures, and dynamics disciplines. A new technology, computational structures technology (CST), has recently emerged as an insightful blend between material modeling, structural and dynamic analysis and synthesis on the one hand, and other disciplines such as computer science, numerical analysis, and approximation theory, on the other hand. CST is an outgrowth of finite element methods developed over the last three decades. The focus of this presentation is on some aspects of CST which can impact future airframes and propulsion systems, as well as on the newly established University of Virginia (UVA) Center for CST. The background and goals for CST are described along with the motivations for developing CST, and a brief discussion is made on computational material modeling. We look at the future in terms of technical needs, computing environment, and research directions. The newly established UVA Center for CST is described. One of the research projects of the Center is described, and a brief summary of the presentation is given.

Noor, Ahmed K.

1992-01-01

273

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

SciTech Connect

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

Hules, J. [ed.

1996-11-01

274

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

NSDL National Science Digital Library

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

Barnes, Dave

275

Genetic Algorithm Modeling with GPU Parallel Computing Technology  

E-print Network

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.

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

2012-01-01

276

Alternative treatment technology information center computer database system  

SciTech Connect

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.

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

1995-10-01

277

Accelerating technology development through integrated computation and experimentation  

SciTech Connect

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

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

2013-01-01

278

Magnification of optical image in holography projection using lensless Fresnel holography  

NASA Astrophysics Data System (ADS)

A digital micro-mirror device (DMD) acting as a real-time hologram is an emerging technology in dynamic holographic projection. This paper presents a lensless image magnification method in DMD holography by using a Fresnel hologram. By analyzing the diffraction order distribution in the image plane of a hologram produced by DMD, we find the factors that limit the size of the magnified image. We perform a lensless magnification experiment that shows good magnified images in accordance with the numerical results. Finally, we discuss methods to eliminate longitudinal error and chromatic aberration in three-dimensional (3-D) and color projection, respectively, and present a 3-D image reconstruction result that shows lensless magnification of a 3-D image without distortion. It is believed that this technique can be used in future real-time holographic projection based on digital light processing technology.

Ma, Jianshe; Su, Ping; Xia, Feipeng; Ren, Zhenbo; Liu, Tong

2012-08-01

279

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

E-print Network

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

Rosen, Joseph

280

Computer Vision Technology for Applications to Assist Blind Dr. Ying-Li Tian, Associate Professor  

E-print Network

Computer Vision Technology for Applications to Assist Blind People Dr. Ying-Li Tian, Associate in computer vision, digital cameras, and portable computers make it possible to develop practical computer for applying computer vision technologies to assist people who are visually impaired including indoor

Zhu, Zhigang

281

Computer aided school administration system using RFID technology  

Microsoft Academic Search

The RFID technology has been received a growing attention and has gotten a wide range of applications. Administration systems for automatically managing routine have-to-do works of school staff and students with the aid of computers are one of them. This study focuses on implementing an automation\\/management system which eases the supervision of students and reduces the burden on school administration

Samet Akp?nar; Hakan Kaptan

2010-01-01

282

IBM ES\\/9000 model 320 air cooled computer technology  

Microsoft Academic Search

The authors describe the IBM ES\\/9000 model 320, an air-cooled mainframe business computer with engineering and scientific processor features equivalent to those of a water-cooled multiframe IBM system 3090 packaged in a single frame. The key is the technology integration of bipolar logic chips with differential current switch circuits and CMOS static random access memory array chips on a thermal

V. Gani; M. Graf; K. Mathews; E. Eichelberger

1991-01-01

283

Vector Field Visual Data Analysis Technologies for Petascale Computational Science  

SciTech Connect

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.

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

284

Reviews of computing technology: Fiber distributed data interface  

SciTech Connect

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

Johnson, A.J.

1991-12-01

285

Reviews of computing technology: Fiber distributed data interface  

SciTech Connect

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

Johnson, A.J.

1991-12-01

286

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

ERIC Educational Resources Information Center

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

Reynolds, Angus

1982-01-01

287

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

ERIC Educational Resources Information Center

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

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

288

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

SciTech Connect

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.

Solem, J.C.

1982-08-01

289

An Overview of Quantum Computing for Technology Managers  

E-print Network

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

Eleanor G. Rieffel

2008-09-26

290

Whole optical wavefields reconstruction by digital holography  

Microsoft Academic Search

In this paper, we have investigated on the potentialities of digital holography for whole reconstruction of wavefields. We show that this technique can be efficiently used for obtaining quantitative information from the intensity and the phase distributions of the reconstructed field at different locations along the propagation direction. The basic concept and procedure of wavefield reconstruction for digital in-line holography

Simonetta Grilli; Pietro Ferraro; Sergio de Nicola; A. Finizio; G. Pierattini; R. Meucci

2001-01-01

291

Color holography to produce highly realistic three-dimensional images.  

PubMed

The 1964 publication by Emmett Leith and Juris Upatnieks [J. Opt. Soc. Am. 54, 1295 (1964)] introduced the possibility of using holograms to record three-dimensional (3D) objects. Since then, there has been an interest in creating display holograms, i.e., holograms primarily produced to show objects in 3D. More recently, full color holography has become a reality, which was predicted in the 1964 paper. To record a hologram in which both the 3D shape and the color of the object are accurately reproduced, at least three laser wavelengths are needed. By computer simulation of the holographic color rendering process, the required amount of laser wavelengths and their distribution within the visible electromagnetic spectrum have been investigated. The quality of a color hologram also depends on the properties of the recording material. The demand on a panchromatic material for color holography is described. Recording techniques for color holograms are presented as well as the future of color holography as the perfect 3D imaging technique. PMID:18239694

Bjelkhagen, Hans I; Mirlis, Evangelos

2008-02-01

292

Schrodinger Holography for z<2  

E-print Network

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.

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

2014-08-29

293

Atom interferometers and atom holography  

SciTech Connect

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.

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

294

Multicolor Holography With Phase Shifting  

NASA Technical Reports Server (NTRS)

Prototype apparatus constructed to test feasibility of two-color holographic interferometric scheme in which data for reconstructing holographic wavefront obtained with help of phase-shifting technique. Provides two sets of data needed to solve equations for effects of temperature and concentration. Concept extended to holography at three or more wavelengths to measure three or more phenomena associated with significant variations in index of refraction

Vikram, Chandra S.

1996-01-01

295

Schrodinger Holography for z<2  

E-print Network

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.

Andrade, Tomas; Peach, Alex; Ross, Simon F

2014-01-01

296

Schrödinger holography for z < 2  

NASA Astrophysics Data System (ADS)

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

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

2015-02-01

297

Holography: childrens' window to relativity  

NASA Astrophysics Data System (ADS)

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.

MacShane, James E.

1995-02-01

298

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

PubMed

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

Katch, F I; Katch, V L

1983-09-01

299

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

E-print Network

Computational Biologist 10X Technologies is a Silicon Valley start-up developing analyses to assess and guide development of the core technology · Work with software team to commercialize new technologies for breakthrough next generation sequencing applications. The core technology

Borenstein, Elhanan

300

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

E-print Network

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

Rimon, Elon

301

Use of Soft Computing Technologies For Rocket Engine Control  

NASA Technical Reports Server (NTRS)

The problem to be addressed in this paper is to explore how the use of Soft Computing Technologies (SCT) could be employed to further improve overall engine system reliability and performance. Specifically, this will be presented by enhancing rocket engine control and engine health management (EHM) using SCT coupled with conventional control technologies, and sound software engineering practices used in Marshall s Flight Software Group. The principle goals are to improve software management, software development time and maintenance, processor execution, fault tolerance and mitigation, and nonlinear control in power level transitions. The intent is not to discuss any shortcomings of existing engine control and EHM methodologies, but to provide alternative design choices for control, EHM, implementation, performance, and sustaining engineering. The approaches outlined in this paper will require knowledge in the fields of rocket engine propulsion, software engineering for embedded systems, and soft computing technologies (i.e., neural networks, fuzzy logic, and Bayesian belief networks), much of which is presented in this paper. The first targeted demonstration rocket engine platform is the MC-1 (formerly FASTRAC Engine) which is simulated with hardware and software in the Marshall Avionics & Software Testbed laboratory that

Trevino, Luis C.; Olcmen, Semih; Polites, Michael

2003-01-01

302

SAR data exploitation: computational technology enabling SAR ATR algorithm development  

NASA Astrophysics Data System (ADS)

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.

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

2007-04-01

303

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

NASA Technical Reports Server (NTRS)

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.

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

1985-01-01

304

Holography with standing surface plasma waves  

NASA Technical Reports Server (NTRS)

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

Cowan, J. J.

1974-01-01

305

Damage Detection Using Holography and Interferometry  

NASA Technical Reports Server (NTRS)

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.

Decker, Arthur J.

2003-01-01

306

Performance Evaluation of Emerging High Performance Computing Technologies using WRF  

NASA Astrophysics Data System (ADS)

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

Newby, G. B.; Morton, D.

2008-12-01

307

Scalable Database Access Technologies for ATLAS Distributed Computing  

E-print Network

ATLAS event data processing requires access to non-event data (detector conditions, calibrations, etc.) stored in relational databases. The database-resident data are crucial for the event data reconstruction processing steps and often required for user analysis. A main focus of ATLAS database operations is on the worldwide distribution of the Conditions DB data, which are necessary for every ATLAS data processing job. Since Conditions DB access is critical for operations with real data, we have developed the system where a different technology can be used as a redundant backup. Redundant database operations infrastructure fully satisfies the requirements of ATLAS reprocessing, which has been proven on a scale of one billion database queries during two reprocessing campaigns of 0.5 PB of single-beam and cosmics data on the Grid. To collect experience and provide input for a best choice of technologies, several promising options for efficient database access in user analysis were evaluated successfully. We present ATLAS experience with scalable database access technologies and describe our approach for prevention of database access bottlenecks in a Grid computing environment.

A. Vaniachine; for the ATLAS Collaboration

2009-10-02

308

Dual thermoplastic holography recording system  

NASA Astrophysics Data System (ADS)

A novel thermoplastic holography recording system is described. The system records the light intensity pattern of the hologram using only electromechanical forces. The hologram is prepared for exposure, processed, and fixed electronically by a 'dry' process within seconds. Poor recordings may be erased repeatedly until the desired hologram is obtained, and recordings can be inspected immediately. Techniques for controlling the phase, spacing, and orientation of plate fringes by means of plate manipulation are described, and experimental results on the systems fringe control capability are presented. Photographs of some of the double plate interferograms are provided.

Umstatter, H. L.; Doty, J. L.; Trolinger, J. D.

1985-01-01

309

Holography through optically active windows  

NASA Technical Reports Server (NTRS)

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.

Decker, A. J.

1979-01-01

310

Aberration Correction in Digital Holography  

NASA Astrophysics Data System (ADS)

Phase aberrations due to atmospheric turbulence, experimental conditions or the imaging system itself can severely limit the resolution of an image. Phase aberrations can be spatially dependent, meaning that a linear, space-invariant transfer function cannot fully correct for all the phase errors across the field-of-view. One can use digital holography to access the complex-valued optical field from a laser-illuminated object after detecting the intensity interference between object and reference beams. Then one can digitally apply phase corrections to the field and propagate that field to the object plane to form an image. In this work, we developed image sharpening approaches to the correction of phase aberrations in digital holography. Image sharpening algorithms employ a nonlinear optimization routine to sense and compensate the phase aberrations to form a fine-resolution reconstructed image. In this thesis, we examined phase correction for two specific applications: imaging through multiple phase screens and synthetic-aperture digital holography. In both cases, our work concentrated on numerical simulation, algorithm development, and implementation of laboratory experiments. For imaging through phase screens, we developed a modified sharpness metric which preserves the space-bandwidth product upon propagation to prevent oversharpening the image. We successfully demonstrated successful image reconstructions through multiple phase screens in numerical simulation for two and three phase screens and in a laboratory experiment for two phase screens, simulating space-variant aberrating media such as volume atmospheric turbulence. Synthetic aperture digital holography (SADH) takes a collection of individual translated holographic frames and mosaics them to form a larger aperture. This increased aperture size results in greatly increased resolution (if not degraded by phase aberrations). We developed multiple approaches to aberration correction in SADH. We demonstrated the use of slope measurements between hologram sub-apertures with a non-iterative modal reconstructor to correct lower-order phase errors. Using an angular spectrum propagation technique with an image sharpening approach, we have demonstrated higher-order aberration correction and diffraction-limited resolution for a 12,000 by 18,000 pixel synthetic aperture. Finally, using an approximate Fresnel-like propagator in combination with an image sharpening algorithm, we demonstrated high-resolution, nonparaxial imaging over a region-of-interest for a 32,768 by 32,768 pixel (full gigapixel) synthetic aperture.

Tippie, Abbie E.

311

Implementation of Parallel Computing Technology to Vortex Flow  

NASA Technical Reports Server (NTRS)

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.

Dacles-Mariani, Jennifer

1999-01-01

312

Prototype Space Technology Hall of Fame exhibit at Technology 2003: Analysis of data from computer-based questionaire  

NASA Technical Reports Server (NTRS)

The U.S. Space Foundation displayed its prototype Space Technology Hall of Fame exhibit design at the Technology 2003 conference in Anaheim, CA, December 7-9, 1993. In order to sample public opinion on space technology in general and the exhibit in particular, a computer-based survey was set up as a part of the display. The data collected was analyzed.

Ewell, Robert N.

1994-01-01

313

Entanglement entropy in Galilean conformal field theories and flat holography  

E-print Network

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.

Arjun Bagchi; Rudranil Basu; Daniel Grumiller; Max Riegler

2014-10-15

314

Entanglement entropy in Galilean conformal field theories and flat holography  

E-print Network

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.

Bagchi, Arjun; Grumiller, Daniel; Riegler, Max

2014-01-01

315

Criteria for the observation of strong-field photoelectron holography  

SciTech Connect

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

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

2011-11-15

316

Optical encryption of three-dimensional information with digital holography  

NASA Astrophysics Data System (ADS)

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

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

2014-11-01

317

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

NASA Astrophysics Data System (ADS)

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.

Drzewiecki, Tadeusz M.; Macia, Narciso F.

2003-04-01

318

Matrix model holography  

E-print Network

We set up the formalism of holographic renormalization for the matter-coupled two-dimensional maximal supergravity that captures the low-lying fluctuations around the non-conformal D0-brane near-horizon geometry. As an application we compute holographically one- and two-point functions of the BFSS matrix quantum mechanics and its supersymmetric $SO(3)\\times SO(6)$ deformation.

Ortiz, Thomas; Tsimpis, Dimitrios

2014-01-01

319

Three-Dimensional Nonlinear Acoustical Holography  

E-print Network

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...

Niu, Yaying

2013-05-06

320

Holography as a Liberal Arts Physics Course  

ERIC Educational Resources Information Center

Describes a liberal arts physics course for all majors interested in holography or to satisfy the general education requirements. An outline of the course and some experience of offering it are given. (Author/GA)

Huang, Jacob Wen-kuang

1978-01-01

321

Holography: Art in an Ephemeral Medium.  

ERIC Educational Resources Information Center

The science of holography provides an opportunity to see reality by illusion using laser light, lenses, and mirrors. To develop as holographic artists, students must first gain proficiency in using its techniques, equipment, and materials. (Author/CMV)

Buterbaugh, James G.

1979-01-01

322

Important Advances in Technology and Unique Applications to Cardiovascular Computed Tomography  

PubMed Central

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

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

2014-01-01

323

Extending the Sonic Flashlight to Real Time Tomographic Holography  

E-print Network

Extending the Sonic Flashlight to Real Time Tomographic Holography Andreas Nowatzyk 1,2 , Damion with a Holographic Optical Element (HOE). The new technique, called Real Time Tomographic Holography (RTTH), has

Stetten, George

324

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

Microsoft Academic Search

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

Virginia Donnell

2004-01-01

325

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

ERIC Educational Resources Information Center

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…

Zuniga, Ramiro

2009-01-01

326

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

327

The Impact of Computer Self-Efficacy and Technology Dependence on Computer-Related Technostress: A Social Cognitive Theory Perspective  

Microsoft Academic Search

As professionals and end users of computers, we are often experiencing being constantly surrounded by modern technology. One side effect of modern technology is termed technostress which refers to the “negative impact on attitudes, thoughts, behaviors, or body physiology that is caused either directly or indirectly by technology”. Based on social cognitive theory, this study developed a conceptual model in

Qin Shu; Qiang Tu; Kanliang Wang

2011-01-01

328

Application Specific Performance Technology for Productive Parallel Computing  

SciTech Connect

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.

Allen D. Malony; Sameer Shende

2008-10-01

329

Shallow depth subsurface imaging with microwave holography  

NASA Astrophysics Data System (ADS)

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

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

2014-05-01

330

Advances in computer technology: impact on the practice of medicine.  

PubMed

Advances in computer technology provide a wide range of applications which are revolutionizing the practice of medicine. The development of new software for the office creates a web of communication among physicians, staff members, health care facilities and associated agencies. This provides the physician with the prospect of a paperless office. At the other end of the spectrum, the development of 3D work stations and software based on computational chemistry permits visualization of protein molecules involved in disease. Computer assisted molecular modeling has been used to construct working 3D models of lens alpha-crystallin. The 3D structure of alpha-crystallin is basic to our understanding of the molecular mechanisms involved in lens fiber cell maturation, stabilization of the inner nuclear region, the maintenance of lens transparency and cataractogenesis. The major component of the high molecular weight aggregates that occur during cataractogenesis is alpha-crystallin subunits. Subunits of alpha-crystallin occur in other tissues of the body. In the central nervous system accumulation of these subunits in the form of dense inclusion bodies occurs in pathological conditions such as Alzheimer's disease, Huntington's disease, multiple sclerosis and toxoplasmosis (Iwaki, Wisniewski et al., 1992), as well as neoplasms of astrocyte origin (Iwaki, Iwaki, et al., 1991). Also cardiac ischemia is associated with an increased alpha B synthesis (Chiesi, Longoni et al., 1990). On a more global level, the molecular structure of alpha-crystallin may provide information pertaining to the function of small heat shock proteins, hsp, in maintaining cell stability under the stress of disease. PMID:8721907

Groth-Vasselli, B; Singh, K; Farnsworth, P N

1995-01-01

331

Aging and Holography  

E-print Network

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

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

2010-04-21

332

Introduction 1.1 History of electron holography  

E-print Network

Chapter 1 Introduction 1.1 History of electron holography Already in 1948 Gabor introduced electron holography as a technique [1, 2], nearly half a century before it became practical for routine application]. A detailed account of the first decade of development of holography is given in Ref. [4]. After the second

333

Position-Dependent Defocus Processing for Acoustic Holography Images  

E-print Network

Position-Dependent Defocus Processing for Acoustic Holography Images Ruming Yin,1 Patrick J. Flynn 2002 ABSTRACT: Acoustic holography is a transmission-based ultrasound imaging method that uses optical by acoustic holography requires position-dependent filtering for the enhancement step. It is found

Flynn, Patrick J.

334

Imaging a vibrating object by Sideband Digital Holography  

E-print Network

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

Paris-Sud XI, Université de

335

Electron holography of oxy-exsolution microstructures in synthetic titanomagnetites  

E-print Network

Electron holography of oxy-exsolution microstructures in synthetic titanomagnetites Church, N S nc and composition of the magnetic phases. Electron holography, a TEM technique that allows the quantitative are pseudo-single-domain to multidomain. Electron holography was carried out on thinned samples to measure

Dunin-Borkowski, Rafal E.

336

Development of frequency-domain holography X attosecond  

E-print Network

Development of frequency-domain holography 693220023 #12;#12;i ! #12;ii Ge physical picture of the phenomenal. Frequency domain holography is known as one of the best tool, the progress of frequency domain interferometer and frequency domain holography is reviewed and a brief

337

INVERSE SOUND SOURCE RECONSTRUCTION BY EXTERIOR SPHERICAL ACOUSTICAL HOLOGRAPHY  

E-print Network

INVERSE SOUND SOURCE RECONSTRUCTION BY EXTERIOR SPHERICAL ACOUSTICAL HOLOGRAPHY WITH MODEL@gmail.com Spherical acoustical holography (SAH) can be used to reconstruct the 3D sound field from acoustic data the source position from the hologram data are investigated. 1. Introduction Spherical acoustical holography

338

Recovery of partially occluded objects by applying compressive Fresnel holography  

E-print Network

Recovery of partially occluded objects by applying compressive Fresnel holography Yair Rivenson,1, 2012; posted March 2, 2012 (Doc. ID 161160); published May 15, 2012 A compressive Fresnel holography to reconstruct an object was also adapted to holography [5]. However, each perspective has degraded resolution

Rosen, Joseph

339

ELECTRON HOLOGRAPHY OF NANOMAGNETS IN ROCKS AND BACTERIA  

E-print Network

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

Dunin-Borkowski, Rafal E.

340

Integral holography: white-light single-shot hologram acquisition  

E-print Network

Integral holography: white-light single-shot hologram acquisition Natan T. Shaked1* , Joseph Rosen1 as integral holography, is proved for the general case and demonstrated experimentally for a simple case. ©2007 Optical Society of America OCIS codes: (090.0090) Holography; (110.6880) Three-dimensional image

Rosen, Joseph

341

FARSIDE HELIOSEISMIC HOLOGRAPHY: RECENT ADVANCES I. Gonzalez Hernandez1  

E-print Network

FARSIDE HELIOSEISMIC HOLOGRAPHY: RECENT ADVANCES I. Gonz´alez Hern´andez1 , F. Hill1 , C. Lindsey2 the farside signal in terms of equivalent mag- netic field. Key words: Sun; Helioseismic Holography; Far side holography, developed by Lindsey & Braun [4], made it possible to map the magnetic regions on the non

Braun, Douglas C.

342

Surface wave holography on designing subwavelength metallic structures  

E-print Network

Surface wave holography on designing subwavelength metallic structures Yu-Hui Chen, Jin-Xin Fu report a method in the framework of surface wave holography to manipulate the electromagnetic wave on subwavelength metal structures. ©2011 Optical Society of America OCIS codes: (090.2910) Holography, microwave

Wang, Wei Hua

343

Electron holography of nanostructured materials Rafal E Dunin-Borkowski  

E-print Network

Electron holography of nanostructured materials Rafal E Dunin-Borkowski Center for Electron-axis electron holography to the characterization of magnetic and electrostatic fields in nanoscale materials resolution off-axis electron holography is increasingly used to characterize magnetic and electrostatic

Dunin-Borkowski, Rafal E.

344

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

E-print Network

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

Paris-Sud XI, Université de

345

Digital Planar Holography and Multiplexer/Demultiplexer with Discrete Dispersion  

E-print Network

Digital Planar Holography and Multiplexer/Demultiplexer with Discrete Dispersion Vladimir Yankova Holography (DPH) has arrived due to progress in microlithography, planar waveguide fabrication to DIGITAL PLANAR HOLOGRAPHY A hologram is a combination of millions of sub-wavelength size (a fraction

Miller, Ethan L.

346

Holography And Holometry Applications In Dental Research  

NASA Astrophysics Data System (ADS)

The earliest reference to holographic applications appeared in the dental literature in 1972 when Wictorin, Bjelkhagen and Abramson described a method to study elastic deformation of defective gold solder joints in simulated fixed bridges. Their paper, published in the Swedish dental literature, offered a concise presentation of the interferometry technique which led to the development of other research applications of holographic interferometry(holometry) in dentistry. In this presentation, the development and application of the interferometry technique in the dental field will be discussed. Various interesting and potentially useful applications of holography have appeared in the dental literature over the past decade. Some of these, which will be discussed, include the use of holograms as a storage medium for dental study models, multiplexing of computer(CT) scan sections to form white light viewable holograms and the potential application of holographic training aids in the teaching of the basic courses of dental anatomy and restorative dentistry. In addition, some unique related applications will be mentioned including a laser reflection method for accurate non-contact measurement of tooth mobility/movement and a technique for contour mapping of occlusal surfaces to measure wear of restorative materials.

Willenborg, George C.

1987-06-01

347

Holography of 3d Flat Cosmological Horizons  

E-print Network

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 shifted-boost orbifold of R^{1,2}, the flat limit of non-extremal rotating BTZ black holes. These 3d geometries carry non-zero charges under the asymptotic symmetry algebra of R^{1,2}, the 3d Bondi-Metzner-Sachs (BMS3) algebra. The dual theory has the symmetries of the 2d Galilean Conformal Algebra, a contraction of two copies of the Virasoro algebra, which is isomorphic to BMS3. We study flat holography as a limit of AdS3/CFT2 to semi-classically compute the density of states in the dual, exactly reproducing the bulk entropy in the limit of large charges. Our flat horizons, remnants of the BTZ inner horizons also satisfy a first law of thermodynamics. We comment on how the dual theory reproduces the bulk first law and how cosmological bulk excitations are matched with boundary quantum numbers.

Arjun Bagchi; Stephane Detournay; Reza Fareghbal; Joan Simon

2012-08-21

348

Acoustic-emission linear-pulse holography  

SciTech Connect

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.

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

1982-06-01

349

Computers and Classrooms: The Status of Technology in U.S. Schools. Policy Information Report.  

ERIC Educational Resources Information Center

The purpose of this report is to provide a "snapshot" of the status of technology use in United States schools. The report focuses on the following: school access to technology; student use of computers; evaluating the impact of educational technology; connecting teachers and technology; assessing the content and quality of courseware; and the…

Coley, Richard; Cradler, John; Engel, Penelope K.

350

Permutation orbifolds and holography  

E-print Network

Two dimensional conformal field theories with large central charge and a sparse low-lying spectrum are expected to admit a classical string holographic dual. We construct a large class of such theories employing permutation orbifold technology. In particular, we describe the group theoretic constraints on permutation groups to ensure a (stringy) holographic CFT. The primary result we uncover is that in order for the degeneracy of states to be finite in the large central charge limit, the groups of interest are the so-called oligomorphic permutation groups. Further requiring that the low-lying spectrum be sparse enough puts a bound on the number of orbits of these groups (on finite element subsets). Along the way we also study familiar cyclic and symmetric orbifolds to build intuition. We also demonstrate how holographic spectral properties are tied to the geometry of covering spaces for permutation orbifolds.

Haehl, Felix M

2014-01-01

351

Numerical heterodyne holography with two-dimensional photodetector arrays F. Le Clerc, L. Collot  

E-print Network

Numerical heterodyne holography with two-dimensional photodetector arrays F. Le Clerc, L. Collot Paris cedex 05 France We present an original heterodyne holography method for digital holography-axis photons. Heterodyne holography is superior to off-axis digital holography for both field of view

Paris-Sud XI, Université de

352

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

E-print Network

Workshop on Computer Science and Information Technologies CSIT'2002, Patras, Greece, 2002 Intelligent Educational Systems for Individualized Learning Jim Prentzas, Ioannis Hatzilygeroudis Department of Computer Engineering & Informatics University of Patras Patras, Greece & Computer Technology Institute

353

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

SciTech Connect

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.

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

1992-07-01

354

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

SciTech Connect

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.

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

1992-07-01

355

The impact of technological change on older workers: Evidence from data on computer use  

Microsoft Academic Search

New technologies like computers alter skill requirements. This paper explores two related effects of the spread of computers on older workers, using data from the Current Population Survey and the Health and Retirement Study. One conclusion is that impending retirement, rather than age alone, explains why older workers used computers less than prime-age workers. A second conclusion is that computer

Leora Friedberg

2003-01-01

356

PLYMOUTH BRAIN-COMPUTER MUSIC INTERFACE PROJECT: INTELLIGENT ASSISTIVE TECHNOLOGY FOR MUSIC-MAKING  

E-print Network

PLYMOUTH BRAIN-COMPUTER MUSIC INTERFACE PROJECT: INTELLIGENT ASSISTIVE TECHNOLOGY FOR MUSIC (Brain-Computer Musical Interfaces or BCMI) and we pay special attention to the development of generative in a paper entitled Toward Direct Brain-Computer Communication [21]. This field of research is known as Brain-Computer

Miranda, Eduardo Reck

357

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

358

Unruh Effect and Holography  

E-print Network

We study the Unruh effect on the dynamics of quarks and mesons in the context of AdS$_5$/CFT$_4$ correspondence. We adopt an AdS$_5$ metric with the boundary Rindler horizon extending into a bulk Rindler-like horizon, which yields the thermodynamics with Unruh temperature verified by computing the boundary stress tensor. We then embed in it a probe fundamental string and a $D7$ brane in such a way that they become the dual of an accelerated quark and a meson in Minkowski space, respectively. Using the standard procedure of holographic renormalization, we calculate the chiral condensate, and also the spectral functions for both the accelerated quark and meson. Especially, we extract the corresponding strength of random force of the Langevin dynamics and observe that it can characterize the phase transition of meson melting. This result raises an issue toward a formulation of complementarity principle for the Rindler horizon. We find most of the dynamical features are qualitatively similar to the ones in the thermal bath dual to the AdS black hole background, though they could be quite different quantitatively.

Takayuki Hirayama; Pei-Wen Kao; Shoichi Kawamoto; Feng-Li Lin

2010-01-08

359

Acoustic emission linear pulse holography  

DOEpatents

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

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

1983-10-25

360

Schrödinger Holography with $z=2$  

E-print Network

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.

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

2014-11-28

361

Even spin minimal model holography  

E-print Network

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.

Constantin Candu; Matthias R. Gaberdiel; Maximilian Kelm; Carl Vollenweider

2012-11-13

362

Digital holography-based steganography.  

PubMed

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

Hamam, Habib

2010-12-15

363

Depth-filtered digital holography.  

PubMed

We introduce depth-filtered digital holography (DFDH) as a method for quantitative tomographic phase imaging of buried layers in multilayer samples. The procedure is based on the acquisition of multiple holograms for different wavelengths. Analyzing the intensity over wavelength pixel wise and using an inverse Fourier transform leads to a depth-profile of the multilayered sample. Applying a windowed Fourier transform with a narrow window, we choose a depth-of interest (DOI) which is used to synthesize filtered interference patterns that just contain information of this limited depth. We use the angular spectrum method to introduce an additional spatial filtering and to reconstruct the corresponding holograms. After a short theoretical framework we show experimental proof-of-principle results for the method. PMID:23037413

Koukourakis, Nektarios; Jaedicke, Volker; Adinda-Ougba, Adamou; Goebel, Sebastian; Wiethoff, Helge; Höpfner, Henning; Gerhardt, Nils C; Hofmann, Martin R

2012-09-24

364

Reviews of computing technology: Fiber distributed data interface. Revision  

SciTech Connect

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

Johnson, A.J.

1992-04-01

365

Reviews of computing technology: Fiber distributed data interface  

SciTech Connect

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

Johnson, A.J.

1992-04-01

366

Technology in the Classroom: Computers and Instruction in Vermont's Schools.  

ERIC Educational Resources Information Center

This guide on technology gives parents and community members an understanding of how information technology is an essential part of children's education in Vermont's schools. The first section provides an overview of technology, including: using technology to collect, share, and analyze information in ways that were impossible ten years ago:…

Hyjek, Phil; Gilbert, Allen; Graham, Christine; Marsters, David; Reposa, Judi; Romond, Bill; Soule, Chuck; Tuscany, Bonnie.

367

Integration of Old and New Technology: Computers, Photography, and Video Technology in an Even Start Family Literacy Project.  

ERIC Educational Resources Information Center

McCosh Even Start, a federally funded family-literacy project located in a Chicago school, used older donated Apple computers, video technology, and photography to develop literacy and also to evaluate parents' and children's literacy progress. Older and newer technologies were successfully combined. (MLH)

Landerholm, Elizabeth

1999-01-01

368

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

ERIC Educational Resources Information Center

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…

Ekufu, ThankGod K.

2012-01-01

369

Exploring de Sitter Space and Holography  

E-print Network

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.

Vijay Balasubramanian; Jan de Boer; Djordje Minic

2002-09-11

370

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

ERIC Educational Resources Information Center

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…

Farmer, Edgar I.

371

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

ERIC Educational Resources Information Center

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…

Ihmeideh, Fathi

2010-01-01

372

Application Research on the Computer Technology in Multiple Choice Questions in Sports Questionnaire Survey  

Microsoft Academic Search

Computer Technology has been widely applied to the sports research. However, with researches going on, more and more questions come into being. This paper provides an insight to the processing of multiple choice data and the specific ways of applying computer technology in the light of what is multiple choice questions. The author undergoes a few case studies so as

Fu Yu-kun

2010-01-01

373

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

ERIC Educational Resources Information Center

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…

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

2012-01-01

374

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

ERIC Educational Resources Information Center

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

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

2013-01-01

375

Technology Acceptance of Cloud Computing: Empirical Evidence from German IT Departments  

Microsoft Academic Search

In this article, we examine the technology acceptance of cloud computing by analyzing empirical data from 100 CIOs and IT managers from stock indexed companies using factor analysis. For a valid methodological background we use a modified version of the common Technology Acceptance Model. The outcomes indicate that user acceptance of cloud computing can be explained and predicted by various

Nicky Opitz; Tobias F. Langkau; Nils H. Schmidt; Lutz M. Kolbe

2012-01-01

376

Automatic tracking of swimming microorganisms in 4D digital in-line holography data  

E-print Network

Automatic tracking of swimming microorganisms in 4D digital in-line holography data L. Leal Taix Abstract Digital in-line holography is a microscopy technique which has gotten an increasing amount-line holography,

377

Electron holography and environmental transmission electron microscopy of magnetism at the nanoscale  

E-print Network

Electron holography and environmental transmission electron microscopy of magnetism holography. Interpretation of the recorded phase shift allows magnetic fields in materials and in working on the specimen surface are minimized. We are currently combining electron holography with environmental TEM

Dunin-Borkowski, Rafal E.

378

Single-shot phase-shifting digital holography  

NASA Astrophysics Data System (ADS)

Single-shot three-dimensional biological imaging has broad applications in basic and clinical research as well as clinical use. We propose a three-dimensional imaging system that can be configured in transmission, reflection or fluorescence modes. This system is capable of recording/measuring the amplitude, phase and polarization of an optical wavefront in a single shot and reconstructing numerically objects with three-dimensional volumetric information. Built upon the principle of digital holography (DH), the proposed system uses a reference beam to interfere with the light field under investigation and digitally records/measures the in-phase and quadrature interference patterns. Single-shot in-phase and quadrature interference pattern recording is made possible by incorporating technologies widely used in coherent optical communication. Specifically, a free-space optical 90° hybrid is employed to measure the complex (real and imaginary) optical field from transmission through, reflection from or fluorescence of biological samples. We have constructed a single-shot phase-shifting digital holography system and experimentally demonstrated its operation for the first time.

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

2013-03-01

379

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

ERIC Educational Resources Information Center

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…

Tecnica Education Corp., San Carlos, CA.

380

Relating Computer, Communication, and Computer-Mediated Communication Apprehensions to New Communication Technology Use in the Workplace  

Microsoft Academic Search

This study explores three issues regarding the use of multiple workplace communication technologies: the relationships between distinct forms of apprehension (computer, communication, and writing) and use, the relative contribution of computer-mediated communication (CMC) apprehension for predicting use, and changes in these relationships over time. A trend study, which consisted of the collection of data from two samples (N= 205) separated

Craig R. Scott; C. Erik Timmerman

2005-01-01

381

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

E-print Network

to the discipline of Sound Recording Technology. · Contact the Music Department, Durgin Hall, 978-934-3850 #12;Updated: 10/8/08 Sound Recording Technology Minor for Electrical and Computer Engineering Students This supportive minor in sound recording technology is for electrical engineering majors only. Students

Massachusetts at Lowell, University of

382

A Computer-Assisted Approach for Conducting Information Technology Applied Instructions  

ERIC Educational Resources Information Center

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…

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

2009-01-01

383

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

NASA Technical Reports Server (NTRS)

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.

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

1984-01-01

384

The application of computer-aided technologies in automotive styling design  

NASA Astrophysics Data System (ADS)

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.

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

2012-04-01

385

Seeing Ourselves in the Computer: How We Relate to Technologies.  

ERIC Educational Resources Information Center

Suggests it is not difficult to imbue computers with human personalities. Discusses the work of Rodolphe Topffer (1799-1846), an artist, designer, and amateur psychologist. Concludes that responding socially to computers has significant implications for media literacy. (SG)

Mishra, Punyashloke; Nicholson, Michael D.; Wojcikiewicz, Steven K.

2001-01-01

386

Simple, complete, and novel quantitative model of holography for students of science and science education  

NASA Astrophysics Data System (ADS)

A Moiré graphical method for predicting the directions of all permitted image waves for thin and volume holograms is described. This method has been developed in connection with a holography centred optics course for students in science, technology and science education that has evolved over several decades. A somewhat unique view of the holographic process underlies this novel method of predicting the behaviour of diffraction gratings.

Olson, Dale W.

2013-02-01

387

Reconfiguring Basic Computer Occupations: Between Technology and Service.  

ERIC Educational Resources Information Center

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,…

Liaroutzos, Oliver; Robichon, Marc

2000-01-01

388

Making Advanced Computer Science Topics More Accessible through Interactive Technologies  

ERIC Educational Resources Information Center

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

Shao, Kun; Maher, Peter

2012-01-01

389

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

ERIC Educational Resources Information Center

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…

Leonard, Dennis

390

Cloud Computing: A Free Technology Option to Promote Collaborative Learning  

ERIC Educational Resources Information Center

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…

Siegle, Del

2010-01-01

391

AHaH computing with thermodynamic RAM: bridging the technology stack  

NASA Astrophysics Data System (ADS)

We introduce the motivations behind AHaH computing, an emerging new form of adaptive computing with many applications in machine learning. We then present a technology stack or specification describing the multiple levels of abstraction and specialization needed to support AHaH computing.

Nugent, Alex

2014-05-01

392

Computer-Related Assistive Technology: Satisfaction and Experiences among Users with Disabilities  

ERIC Educational Resources Information Center

Many people with disabilities use assistive technology devices (ATDs) for computer access. The specific focus of this exploratory study was (a) to assess the experiences, opinions, and satisfaction levels of 24 individuals with disabilities using computer-related ATDs; (b) to investigate their awareness of health risk factors related to computer…

Burton, Mary; Nieuwenhuijsen, Els R.; Epstein, Marcy J.

2008-01-01

393

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

E-print Network

: 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

Plotkin, Joshua B.

394

Cloud Computing Based Technologies, Applications and Structure in U-learning  

Microsoft Academic Search

This article mainly focuses on the characteristic, technologies and applications of cloud computing in mobile and electronic learning, and analyzes the features of this concept. We firstly tried to clarify the meaning of cloud computing as well as its features, secondly, proposed different models of using cloud computing in different learning environments, including web-based learning, mobile video learning and observational

Aida Ghazizadeh; Maziar Manouchehry

2012-01-01

395

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

ERIC Educational Resources Information Center

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…

Tweel, Abdeneaser

2012-01-01

396

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

397

Human-computer communications with special reference to technological developments, occupational stress and educational needs  

Microsoft Academic Search

The rapid development of computer technology is reviewed and its impact on employment and on the gross national product is mentioned. The process of designing an effective human-computer communication system is outlined, the role of job satisfaction is mentioned and methods which can be utilized to minimize (or optimize) occupational stress in human-computer communication work environment is discussed. The impact

GAVRIEL SALVENDY

1982-01-01

398

Integral photography capture and electronic holography display  

NASA Astrophysics Data System (ADS)

This paper describes electronic holography output of three-dimensional (3D) video with integral photography as input. A real-time 3D image reconstruction system was implemented by using a 4K (3840×2160) resolution IP camera to capture 3D images and converting them to 8K (7680×4320) resolution holograms. Multiple graphics processing units (GPUs) were used to create 8K holograms from 4K IP images. In addition, higher resolution holograms were created to successfully reconstruct live-scene video having a diagonal size of 6 cm using a large electronic holography display.

Ichihashi, Yasuyuki; Yamamoto, Kenji

2014-06-01

399

Holography on the Spacelab 3 mission  

NASA Technical Reports Server (NTRS)

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.

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

1985-01-01

400

Contrasting string holography to its optical namesake  

E-print Network

We assess the prospects of using metamaterials for simulating various aspects of analogue gravity and holographic correspondence. Albeit requiring a careful engineering of the dielectric media, some hallmark features reminiscent of the hypothetical 'generalized holographic conjecture' can be detected by measuring non-local optical field correlations. The possibility of such simulated behavior might also shed light on the true origin of those apparent holography-like phenomena in the condensed matter systems with emergent effective metrics which may not, in fact, require any references to the string-theoretical holography.

Khveshchenko, D V

2014-01-01

401

Contrasting string holography to its optical namesake  

E-print Network

We assess the prospects of using metamaterials for simulating various aspects of analogue gravity and holographic correspondence. Albeit requiring a careful engineering of the dielectric media, some hallmark features reminiscent of the hypothetical 'generalized holographic conjecture' can be detected by measuring non-local optical field correlations. The possibility of such simulated behavior might also shed light on the true origin of those apparent holography-like phenomena in the condensed matter systems with emergent effective metrics which may not, in fact, require any references to the string-theoretical holography.

D. V. Khveshchenko

2014-11-06

402

Systems analysis for DSN microwave antenna holography  

NASA Technical Reports Server (NTRS)

Proposed systems for Deep Space Network (DSN) microwave antenna holography are analyzed. Microwave holography, as applied to antennas, is a technique which utilizes the Fourier Transform relation between the complex far-field radiation pattern of an antenna and the complex aperture field distribution to provide a methodology for the analysis and evaluation of antenna performance. Resulting aperture phase and amplitude distribution data are used to precisely characterize various crucial performance parameters, including panel alignment, subreflector position, antenna aperture illumination, directivity at various frequencies, and gravity deformation. Microwave holographic analysis provides diagnostic capacity as well as being a powerful tool for evaluating antenna design specifications and their corresponding theoretical models.

Rochblatt, D. J.

1989-01-01

403

QCD and Light-Front Holography  

E-print Network

The eigenvalues of the light-front QCD Hamiltonian, quantized at fixed light-front time \\tau = t+z/c, predict the hadronic mass spectrum and the corresponding eigensolutions provide the light-front wavefunctions which describe hadron structure. More generally, we show that the valence Fock-state wavefunctions of the light-front QCD Hamiltonian satisfy a single-variable relativistic equation of motion, analogous to the nonrelativistic radial Schr\\"odinger equation, with an effective confining potential $U$ which systematically incorporates the effects of higher quark and gluon Fock states. We outline a method for computing the required potential from first principles in QCD. The holographic mapping of gravity in AdS space to QCD, quantized at fixed light-front time, yields the same light-front Schr\\"odinger equation; in fact, the soft-wall AdS/QCD approach provides a model for the light-front potential which is color-confining and reproduces well the light-hadron spectrum. One also derives via light-front holography a precise relation between the bound-state amplitudes in the fifth dimension of AdS space and the boost-invariant light-front wavefunctions describing the internal structure of hadrons in physical space-time. The elastic and transition form factors of the pion and the nucleons are found to be well described in this framework. The light-front AdS/QCD holographic approach thus gives a frame-independent first approximation of the color-confining dynamics, spectroscopy, and excitation spectra of relativistic light-quark bound states in QCD.

Stanley J. Brodsky; Guy F. de Teramond

2012-11-30

404

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

SciTech Connect

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.

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

405

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

NASA Astrophysics Data System (ADS)

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.

Ando, K.; Fujita, S.; Ito, J.; Yuasa, S.; Suzuki, Y.; Nakatani, Y.; Miyazaki, T.; Yoda, H.

2014-05-01

406

Pairing induced superconductivity in holography  

E-print Network

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

Andrey Bagrov; Balazs Meszena; Koenraad Schalm

2014-03-18

407

DSS-24 microwave holography measurements  

NASA Technical Reports Server (NTRS)

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

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

1995-01-01

408

Magnetic Critical Solutions in Holography  

E-print Network

The AdS/CFT correspondence is a realization of the holographic principle in the context of string theory. It is a map between a quantum field theory and a string theory living in one or more extra dimensions. Holography provides new tools to study strongly-coupled quantum field theories. It has important applications in quantum chromodynamics (QCD) and condensed matter (CM) systems, which are usually complicated and strongly coupled. Quantum critical CM theories have scaling symmetries and can be connected to higher-dimensional scale invariant space-times. The Effective Holographic Theory paradigm may be used to describe the low-energy (IR) holographic dynamics of quantum critical systems by the Einstein-Maxwell-Dilaton (EMD) theory. We find the magnetic critical scaling solutions of an EMD theory containing an extra parity-odd term $F\\wedge F$. Previous studies in the absence of magnetic fields have shown the existence of quantum critical lines separated by quantum critical points. We find this is also true in the presence of a magnetic field. The critical solutions are characterized by the triplet of critical exponents ($\\theta,z,\\zeta$), the first two describing the geometry, while the latter describes the charge density.

N. Angelinos

2014-11-03

409

Holography and micro-holography of particle fields: A numerical standard  

NASA Astrophysics Data System (ADS)

Holography is an 'old' technique for studying the behavior of clouds of droplets which finds a new interest with CCD cameras and real-time numerical reconstruction. Furthermore, the continued progress in camera characteristics (sensitivity, pixel number, digitalization level, and so on) opens the way to more accurate recording of the interference field. To gain a deep understanding of the technique, as well as an evaluation of the performance and limitations of digital holographic particle measurements under various conditions, standard holograms are required. In this paper, a general numerical standard of holograms of fields of particles based on rigorous near-field Lorenz-Mie scattering theory is presented. This theory makes possible the computation of holograms of fields of particles with an arbitrary number of particles of arbitrary size, arbitrary refractive index, arbitrary recording distance (near-field or far-field), and an arbitrary collecting angle (forward, off-axis, or backward scattering light). Several calculation examples are also given for the code validation and possible applications, including a new possible way to simultaneously measure the size, location, and refractive index of particles.

Wu, Xuecheng; Meunier-Guttin-Cluzel, Siegfried; Wu, Yingchun; Saengkaew, Sawitree; Lebrun, Denis; Brunel, Marc; Chen, Linghong; Coetmellec, Sébastien; Cen, Kefa; Grehan, Gerard

2012-06-01

410

NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY/ NATIONAL COMPUTER SECURITY CENTER  

E-print Network

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

411

Critical Engagement with Technology in the Computer Classroom.  

ERIC Educational Resources Information Center

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…

Salvo, Michael J.

2002-01-01

412

Security architecture and key technologies for power cloud computing  

Microsoft Academic Search

Power cloud technology meets the need of smart grid, which is better in data processing, control technologies and strategies. With the construction of smart grid to speed up, security risks in power cloud can't be ignored. This paper begins with the hierarchy of power cloud, and then focuses on analyzing the potential security risks in power cloud construction. With the

Yun Yang; Lie Wu; Wenping Hu

2011-01-01

413

Use of Computer Speech Technologies To Enhance Learning.  

ERIC Educational Resources Information Center

Discusses the design of an innovative learning system that uses new technologies for the man-machine interface, incorporating a combination of Automatic Speech Recognition (ASR) and Text To Speech (TTS) synthesis. Highlights include using speech technologies to mimic the attributes of the ideal tutor and design features. (AEF)

Ferrell, Joe

1999-01-01

414

Holography and Brane-bulk Energy Exchange  

E-print Network

The five-dimensional description of generalized Randall-Sundrum cosmology is mapped via holography to a generalization of the Starobinsky model. This provides a holographic dual description of the cosmological brane-bulk energy exchange processes studied previously. Some simple solutions are presented in four dimensions.

Elias Kiritsis

2005-04-27

415

Bulk Microscopy from Holography and Quantum Information  

E-print Network

Bulk Microscopy from Holography and Quantum Information Thursday, 21 November 2013 4:00 Physics Tea Information Paradox: Alive and Kicking" Joseph Polchinski, Kavli Institute for Theoretical Physics (KITP:50 "Shock wave wormholes" Douglas Stanford, Stanford University 4:30 "Behind the horizon in AdS/CFT" Erik

Torquato, Salvatore

416

Zone plate theory based on holography.  

PubMed

A series representation developed from holography theory is used to determine the image distances and relative image intensities for three types of zone plates. The effect of nonlinearity in film reproduction on the hologram of a point object and the images produced by this hologram are discussed. PMID:20057745

Horman, M H; Chau, H H

1967-02-01

417

Bulk Microscopy from Holography and Quantum Information  

E-print Network

Bulk Microscopy from Holography and Quantum Information 22-23 November 2013 Jadwin Hall, Fourth behind horizons? Recent work on black hole physics has emphasized the extent to which we do not have from quantum information theory, in particular entanglement monogamy, error correction

418

E-science meets computational science and information technology  

Microsoft Academic Search

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

G. Fox

2002-01-01

419

Internet and Computer Technology Hazards: Perspectives for Family Counselling.  

ERIC Educational Resources Information Center

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…

Oravec, Jo Ann

2000-01-01

420

A 35 Year Computing Technology Forecast For The Academy  

E-print Network

Gordon Moore, who suggested in 1965 that the computational power available at a particular price doubles structures. 2.1 Moore's Law and the Desktop Moore's Law [11] is due to electronics pioneer and Intel founder to maintain this growth rate: software developers use Moore's Law to predict what computing power

Massey, Bart

421

Ethical and Professional Issues with Computer-Related Technology  

ERIC Educational Resources Information Center

School psychologists have an ethical imperative to determine the ways computers can facilitate practice because of the potential to improve effectiveness and efficiency. At the same time, psychologists have a parallel imperative to consider carefully ethical and professional practice implications. The aspects of computers that render them most…

Harvey, Virginia Smith; Carlson, Janet F.

2003-01-01

422

Science and Technology Resources on the Internet: Computer Security.  

ERIC Educational Resources Information Center

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

Kinkus, Jane F.

2002-01-01

423

Lightforest and the MIT Museum Holography Education Project  

NASA Astrophysics Data System (ADS)

Lightforest installation is a large-scale holographic work permanently installed at the MIT Museum in Cambridge MA. Organic shapes in the rounded walls and floor of a small room (15 by 11 by 9 feet) frame the approximately 200 white- light transmission holograms of fabricated rainforest plants and light and image projections. Additional projects as a result of the Lightforest installation include the creation of a Holography Teaching Program at the MIT Museum, including a partnership with the WSNS elementary school and the creation of a holographic garden mural in the school combining real plants with reflection copies of Lightforest holograms. The combined Lightforest project makes important connections between art, technology, education, and the environment.

Connors, Betsy A.

1998-02-01

424

Ultrasonic Imaging of Subsurface Objects Using Photorefractive Dynamic Holography  

SciTech Connect

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.

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

2001-07-01

425

Holography demonstrations and workshops for science and engineering outreach  

NASA Astrophysics Data System (ADS)

The SPIE/OSA Student Chapter at Michigan Technological University have developed demonstrations and workshops for science and engineering outreach. The practical approach to holography promotes the study of photonic related sciences in high school and college-aged students. An introduction to laser safety, optical laboratory practices, and basic laser coherence theory is given in order to first introduce the participants to the science behind the holograms. The students are then able to create a hologram of an item of their choice, personalizing the experience. By engaging directly, the students are able to see how the theory is applied and also enforces a higher level of attention from them so no mistakes are made in their hologram. Throughout the course participants gain an appreciation for photonics by learning how holograms operate and are constructed through hands on creation of their own holograms. This paper reviews the procedures and methods used in the demonstrations and workshop while examining the overall student experience.

Thomas, Weston; Kruse, Kevin; Middlebrook, Christopher

2012-10-01

426

NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY/ NATIONAL COMPUTER SECURITY CENTER  

E-print Network

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

427

Description & Careers Business Analytics and Information Technology (BAIT) is Rutgers Business School's quantitative and computing major. It  

E-print Network

Business School's quantitative and computing major. It covers information technology, data analysis Analysis and Modeling Business Analytics & Information Technology (BAIT) Major #12;Description & Careers The Field Business Analytics and Information Technology (BAIT) is Rutgers

Lin, Xiaodong

428

Community petascale project for accelerator science and simulation: Advancing computational science for future accelerators and accelerator technologies  

E-print Network

1 Accelerator Science and Technology project, the SciDAC-2Accelerator Science and Technology (AST) project produced aproject’s enabling computer science activities in the area of component technologies,

Spentzouris, Panagiotis

2008-01-01

429

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

NASA Astrophysics Data System (ADS)

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

Tao, Liang; Fan, Yida; Wang, Xingling

430

High resolution integral holography using Fourier ptychographic approach.  

PubMed

An innovative approach is proposed for calculating high resolution computer generated integral holograms by using the Fourier Ptychographic (FP) algorithm. The approach initializes a high resolution complex hologram with a random guess, and then stitches together low resolution multi-view images, synthesized from the elemental images captured by integral imaging (II), to recover the high resolution hologram through an iterative retrieval with FP constrains. This paper begins with an analysis of the principle of hologram synthesis from multi-projections, followed by an accurate determination of the constrains required in the Fourier ptychographic integral-holography (FPIH). Next, the procedure of the approach is described in detail. Finally, optical reconstructions are performed and the results are demonstrated. Theoretical analysis and experiments show that our proposed approach can reconstruct 3D scenes with high resolution. PMID:25607162

Li, Zhaohui; Zhang, Jianqi; Wang, Xiaorui; Liu, Delian

2014-12-29

431

Holography and the Coleman-Mermin-Wagner theorem  

E-print Network

In 2+1 dimensions at finite temperature, spontaneous symmetry breaking of global symmetries is precluded by large thermal fluctuations of the order parameter. The holographic correspondence implies that analogous effects must also occur in 3+1 dimensional theories with gauged symmetries in certain curved spacetimes with horizon. By performing a one loop computation in the background of a holographic superconductor, we show that bulk quantum fluctuations wash out the classical order parameter at sufficiently large distance scales. The low temperature phase is seen to exhibit algebraic long range order. Beyond the specific example we study, holography suggests that IR singular quantum fluctuations of the fields and geometry will play an interesting role for many 3+1 dimensional asymptotically AdS spacetimes with planar horizon.

Anninos, Dionysios; Iqbal, Nabil

2010-01-01

432

Parallel phase-shifting digital holography using spectral estimation technique.  

PubMed

We propose a parallel phase-shifting digital holography using a spectral estimation technique, which enables the instantaneous acquisition of spectral information and three-dimensional (3D) information of a moving object. In this technique, an interference fringe image that contains six holograms with two phase shifts for three laser lines, such as red, green, and blue, is recorded by a space-division multiplexing method with single-shot exposure. The 3D monochrome images of these three laser lines are numerically reconstructed by a computer and used to estimate the spectral reflectance distribution of object using a spectral estimation technique. Preliminary experiments demonstrate the validity of the proposed technique. PMID:25322120

Xia, Peng; Awatsuji, Yasuhiro; Nishio, Kenzo; Ura, Shogo; Matoba, Osamu

2014-09-20

433

Holography and the Coleman-Mermin-Wagner theorem  

SciTech Connect

In 2+1 dimensions at finite temperature, spontaneous symmetry breaking of global symmetries is precluded by large thermal fluctuations of the order parameter. The holographic correspondence implies that analogous effects must also occur in 3+1 dimensional theories with gauged symmetries in certain curved spacetimes with horizon. By performing a one loop computation in the background of a holographic superconductor, we show that bulk quantum fluctuations wash out the classical order parameter at sufficiently large distance scales. The low temperature phase is seen to exhibit algebraic long-range order. Beyond the specific example we study, holography suggests that IR singular quantum fluctuations of the fields and geometry will play an interesting role for many 3+1 dimensional asymptotically anti-de Sitter spacetimes with planar horizon.

Anninos, Dionysios; Hartnoll, Sean A. [Center for the Fundamental Laws of Nature, Harvard University, Cambridge, Massachusetts 02138 (United States); Iqbal, Nabil [Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2010-09-15

434

4f amplified in-line compressive holography.  

PubMed

Compressive holography is a combination of compressive sensing and holography. In this paper, an approach to expand the amplification ratio and enhance the axial resolution in in-line compressive holography is proposed. Firstly the basic principle of 4f amplified in-line compressive holography is described. Next the feasibility of reconstructing object and analysis of reconstruction quality is verified. Finally, both simulated and real experiments on multilayer objects with non-overlapping and overlapping patterns are demonstrated to validate the approach. PMID:25321197

Wu, Xiaoyan; Yu, Yingjie; Zhou, Wenjing; Asundi, Anand

2014-08-25

435

Evaluation of computer-based ultrasonic inservice inspection systems  

SciTech Connect

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.

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

436

Radiotherapy Monte Carlo simulation using cloud computing technology.  

PubMed

Cloud computing allows for vast computational resources to be leveraged quickly and easily in bursts as and when required. Here we describe a technique that allows for Monte Carlo radiotherapy dose calculations to be performed using GEANT4 and executed in the cloud, with relative simulation cost and completion time evaluated as a function of machine count. As expected, simulation completion time decreases as 1/n for n parallel machines, and relative simulation cost is found to be optimal where n is a factor of the total simulation time in hours. Using the technique, we demonstrate the potential usefulness of cloud computing as a solution for rapid Monte Carlo simulation for radiotherapy dose calculation without the need for dedicated local computer hardware as a proof of principal. PMID:23188699

Poole, C M; Cornelius, I; Trapp, J V; Langton, C M

2012-12-01

437

Use of personal computing technology by deaf-blind individuals  

Microsoft Academic Search

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 \\

Dan Zuckerman

1984-01-01

438

Characterization of the spatiotemporal evolution of ultrashort optical pulses using FROG holography.  

PubMed

We propose holographically recorded frequency-resolved-optical-gating (FROG) measurement for probing the evolution of ultrashort optical pulses at multiple locations. As a proof-of-concept demonstration of our method, we record holographic FROG traces at five axial locations as we traverse through the focus of an objective lens along its axis using BaTiO(3) micro-cluster as the nonlinear medium and retrieve the amplitude and phase of the ultrashort pulse at each location. Moreover, the group delay of the pulse retrieved numerically using FROG holography is used to compute the separation between the five locations which agree well with the experimentally measured distances. This study suggests that FROG holography can be used to remove the ambiguity regarding arbitrary constant phase and arbitrary temporal shift in the retrieved pulse at each location (upto to an overall constant phase). PMID:24921808

Mehta, Nikhil; Yang, Chuan; Xu, Yong; Liu, Zhiwen

2014-05-01

439

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

E-print Network

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.

Miguel F. Morales; Michael Matejek

2008-10-28

440

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

SciTech Connect

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.

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

2009-12-20

441

Practical holography VI; Proceedings of the Meeting, San Jose, CA, Feb. 11-13, 1992  

NASA Astrophysics Data System (ADS)

Various papers on practical holography are presented. Individual topics addressed include: improved real-time holography system with LCDs, output devices for electroholography, optimization of hologram computation for real-time display, full-color ultragrams, one-step Lippmann holographic stereogram, automatic particle sizing from rocket motor holograms, broadband IR Lippmann holograms for solar control applications, substrate guided-wave holointerferometry. Also discussed are: photovoltaic systems based on spectrally selective holographic concentrators, modified multilevel phase kinoform for array generator, practical method for optically reducing holographic images, polarization properties of gelatin holograms, selective enhancement/erasure of birefringent interconnections, holographic straight-line scanner using a holoplate, immersion method for determining absolute surface relief.

Benton, Stephen A.

442

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

NASA Astrophysics Data System (ADS)

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.

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

2008-05-01

443

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

ERIC Educational Resources Information Center

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

El Paso Community Coll., TX.

444

Introduction of Grid Computing Application Projects at the NASA Earth Science Technology Office  

Microsoft Academic Search

\\u000a In 2003, NASA Earth Science Technology Office (ESTO) awarded funding for 20 new investigations in information systems technology\\u000a development under the Advanced Information Systems Technology (AIST) Program. Two of the selected proposals specifically used\\u000a Grid computing technology in their Earth science applications:\\u000a \\u000a \\u000a (1) Integration of OGC and Grid Technologies for Earth science modeling and applications\\u000a \\u000a \\u000a The Open Geospatial Consortium (OGC)

Kai-dee Chu; Liping Di; Peter Thornton

2006-01-01

445

Robust Monte Carlo Algorithms Centre for Advanced Computing and Emerging Technologies  

E-print Network

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

Dimov, Ivan

446

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

ERIC Educational Resources Information Center

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.…

Lai, Ming-Ling

2008-01-01

447

Leveraging Computer-Mediated Communication Technologies to Enhance Interactions in Online Learning  

ERIC Educational Resources Information Center

Computer-mediated communication (CMC) technologies have been an integral part of distance education for many years. They are found in both synchronous and asynchronous platforms and are intended to enhance the learning experience for students. CMC technologies add an interactive element to the online learning environment. The findings from this…

Wright, Linda J.

2011-01-01

448

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

ERIC Educational Resources Information Center

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…

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

2010-01-01

449

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

ERIC Educational Resources Information Center

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

Chitayat, Linda

450

Computer Technology in Clinical Psychology Services for People with Mental Retardation: A Review.  

ERIC Educational Resources Information Center

Review of the literature on computer technology in clinical psychology services for people with mental retardation is organized around stages of a scientist-practitioner working model: assessment, formulation, and intervention. Examples of technologies to facilitate work at each stage are given. Practical difficulties with implementation of…

Davies, Sara; Hastings, Richard P.

2003-01-01

451

Ecological Validity and Pervasiveness in the Evaluation of Ubiquitous Computing Technologies for Health Care  

Microsoft Academic Search

The difficulties associated with the evaluation of ubiquitous computing (Ubicomp) technologies increase in application domains such as hospitals, where human life can be at risk, privacy of personal records is paramount, and labor is costly and highly distributed across space and time. For the last 6 years numerous Ubicomp technologies in support of hospital work have been created and pilot-tested.

Jesús Favela; Monica Tentori; Víctor M. González

2010-01-01

452

The Impact of Iranian Teachers Cultural Values on Computer Technology Acceptance  

ERIC Educational Resources Information Center

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…

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

2014-01-01

453

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

ERIC Educational Resources Information Center

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…

Thomas, Shailendra Nelle

2010-01-01

454

GEORGIA INSTITUTE OF TECHNOLOGY COLLEGE OF MANAGEMENT 1 College of Computing  

E-print Network

GEORGIA INSTITUTE OF TECHNOLOGY · COLLEGE OF MANAGEMENT 1 College of Computing College of Management Ivan Allen College of Libera #12;GEORGIA INSTITUTE OF TECHNOLOGY · COLLEGE OF MANAGEMENT 2 since its founding 125 years ago, and private support has shaped the campus and created the qualitative

Li, Mo

455

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

E-print Network

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

Sheridan, Scott

456

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

ERIC Educational Resources Information Center

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

Merrimack Education Center, Chelmsford, MA.

457

Coherence Holography and Spatial Frequency Comb for 3-D Coherence Imaging  

E-print Network

Coherence Holography and Spatial Frequency Comb for 3-D Coherence Imaging Mitsuo Takeda, Wei Wang holography technique, called coherence holography, and a related technique for dispersion-free 3-D coherence: (090.0090) Holography; (030.1640) Coherence; (100.3010) Image reconstruction techniques; (110

Rosen, Joseph

458

Optical sectioning using a digital Fresnel incoherent-holography-based confocal  

E-print Network

Optical sectioning using a digital Fresnel incoherent-holography-based confocal imaging system ROY We propose a new type of confocal microscope using Fresnel incoherent correlation holography (FINCH of America OCIS codes: (090.0090) Holography; (090.1995) Digital holography; (110.6880) Three

Rosen, Joseph

459

OVER THE LAST FIVE YEARS a magnetic imaging technique called electron holography has started to be  

E-print Network

The IRM OVER THE LAST FIVE YEARS a magnetic imaging technique called electron holography has holography and to encourage others in the rock magnetic community to consider using this technique of Electron Holography DENNIS GABOR FIRST DESCRIBED electron holography in 1948 as part of a technique

Dunin-Borkowski, Rafal E.

460

Field Mapping with 1 nm spatial resolution by off-axis electron holography.  

E-print Network

Field Mapping with 1 nm spatial resolution by off-axis electron holography. D Cooper, T Denneulin: Electron Holography, Dopant Profiling, Strain Mapping, Semiconductors. The reduction in the dimensions-axis electron holography. We will critically evaluate the performance of electron holography when using our

Dunin-Borkowski, Rafal E.

461

Bridging the Gap between Web 2.0 Technologies and Social Computing Principles  

Microsoft Academic Search

\\u000a This research presents a brief review of the different definitions of Web 2.0 and presents the most important Web 2.0 Technologies\\u000a that underlie the evolution of the Web. We map these Web 2.0 technologies to the Social Computing Principles and describe\\u000a the different relations and patterns that occur. We argue that creating insight into the relations between Web 2.0 Technologies

Giorgos Kormaris; Marco Spruit

2010-01-01

462

Space-Bounded Communication Complexity Submitted to the Department of Computer Science and Technology  

E-print Network

Space-Bounded Communication Complexity by Hao Song Submitted to the Department of Computer Science . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Department of Computer Science and Technology April 19, 2014 Certified by by . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Shiqiang Yang Chairman, Department Committee on Graduate Theses #12;2 #12;Space-Bounded Communication

Papakonstantinou, Periklis A.

463

Are Computer Science and Information Technology still masculine fields? High school students' perceptions and career choices  

Microsoft Academic Search

This study investigated Greek high school students’ intentions and motivation towards and against pursuing academic studies in Computer Science (CS), the influence of the family and the scholastic environment on students’ career choices, students’ perceptions of CS and the Information Technology (IT) profession as well as students’ attendance at CS courses at school, computer use in the home and self-efficacy

Marina Papastergiou

2008-01-01

464

Evaluation of Two Different Teaching Concepts in Dentistry Using Computer Technology  

ERIC Educational Resources Information Center

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

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

2007-01-01

465

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

ERIC Educational Resources Information Center

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

Nair, Prakash

466

Integration of Computer Technology Into an Introductory-Level Neuroscience Laboratory  

Microsoft Academic Search

We describe 3 computer-based neuroscience laboratories. In the first 2 labs, we used commercially available interactive software to enhance the study of functional and comparative neuroanatomy and neurophysiology. In the remaining lab, we used customized software and hardware in 2 psychophysiological experiments. With the use of the computer-based technology, we have successfully met our pedagogical objectives while minimizing operating costs

Denise L. Evert; Gregory Goodwin; Amy Jo Stavnezer

2005-01-01

467

Faculty's Acceptance of Computer Based Technology: Cross-Validation of an Extended Model  

ERIC Educational Resources Information Center

The first aim of the present study is to validate an extended technology acceptance model (TAME) on the data derived from the faculty members of a university in an ongoing, computer mediated work setting. The study extended the original TAM model by including an intrinsic motivation component--computer self efficacy. In so doing, the study…

Ahmad, Tunku Badariah Tunku; Madarsha, Kamal Basha; Zainuddin, Ahmad Marzuki; Ismail, Nik Ahmad Hisham; Nordin, Mohamad Sahari

2010-01-01

468

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

ERIC Educational Resources Information Center

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

Moss, Mark

2004-01-01

469

Computing Technology: Created, Fallen, In Need Of Redemption? Joel C. Adams  

E-print Network

of the created order, then a variety of creation-related biblical themes become applicable to computing, particularly the themes of creation-fall-redemption, the cultural mandate, and stewardship. We also explore two developments in computing technology ­ the evolution of user interfaces and the evolution of programming

Adams, Joel

470

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

ERIC Educational Resources Information Center

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

Cavus, Nadire

2008-01-01

471

Search Technology Internet Start-Ups Business Computing Companies  

E-print Network

engines. The challenges that the major search engines face in penetrating this so-called Deep Web go data from the Deep Web, search engines have to analyze users' search terms and figure out how to broker of technologies is taking shape that will extend the reach of search engines into the Web's hidden corners. When

Freire, Juliana

472

NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY! NATIONAL COMPUTER SECURITY CENTER  

E-print Network

L. Dain Gary Carnegie Mellon University William Geer AFCSC Virgil Gibson Grumann Data Systems Dennis Gilbert National Institute of Standards and Technology Irene Gilbert National Institute of Frank Mayer Dr. Catherine Meadows Sally Meglathery William H. Murray Noel Nazario Dr. Peter Neumann Nick

473

Delft University of Technology Master's Thesis in Computer Engineering  

E-print Network

Traffic to Wi-Fi Through MASS-ANET: Mobile Assisted Ad-hoc Networking Marco Cova #12;#12;Offloading Mobile University of Technology Mekelweg 4, 2628 CD Delft, The Netherlands Marco Cova 4th October 2011 #12;Author Marco Cova Title Offloading Mobile Data Traffic to Wi-Fi Through MASS-ANET: Mobile Assisted Ad

Kuzmanov, Georgi

474

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

NASA Technical Reports Server (NTRS)

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

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

1977-01-01

475

Videodisc - Computer Technology in the Teaching of Pathology.  

ERIC Educational Resources Information Center

Examines whether the use of computers is more efficient than traditional methodology in terms of time and cost in reaching goals related to: (1) vocabulary; (2) concepts of disease processes; (3) specific organ system pathology; (4) disease morphology; and (5) laboratory testing. (JN)

Templeton, Alexander C.

1985-01-01

476

EINDHOVEN UNIVERSITY OF TECHNOLOGY Department of Mathematics and Computer Science  

E-print Network

-56 September 2010 Finsler geometry on higher order tensor fields and applications to high angular resolution-multidirectional images, using Finsler geometry. The application considered here is in medical image analysis diffusion imaging by L.J. Astola, L.M.J. Florack Centre for Analysis, Scientific computing and Applications

Eindhoven, Technische Universiteit

477

Effects of Educational Beliefs on Attitudes towards Using Computer Technologies  

ERIC Educational Resources Information Center

This study, aiming to determine the relationship between pre-service teachers' beliefs about education and their attitudes towards utilizing computers and internet, is a descriptive study in scanning model. The sampling of the study consisted of 270 pre-service teachers. The potential relationship between the beliefs of pre-service teachers about…

Onen, Aysem Seda

2012-01-01

478

Hindawi Publishing Corporation International Journal of Computer Games Technology  

E-print Network

, The Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester M1 5GD, UK for Interactive Game Interfaces John Darby, Baihua Li, and Nick Costen Department of Computing and Mathematics Correspondence should be addressed to John Darby, j.darby@mmu.ac.uk Received 28 September 2007; Accepted 13

Li, Baihua

479

Christian Lessig Computing+Mathematical Sciences, California Institute of Technology  

E-print Network

Image and Signal Processing: From Radiation Transport to Image Processing #12;2 Personal Background · B Transport of (visible) electromagnetic energy in macroscopic environments. Images #12;9 measurements Light imaging (microscopy, biopsy, ...). #12;16 Applications of Light Transport ·Computer graphics (CAD, design

Desbrun, Mathieu

480

Computer-Integrated Manufacturing Technology. Tech Prep Competency Profile.  

ERIC Educational Resources Information Center

This tech prep competency profile covers these occupations: manufacturing technician, computer-assisted design and drafting (CADD) technician, quality technician, and mechanical technician. Section 1 provides occupation definitions. Section 2 lists development committee members. Section 3 provides the leveling codes---abbreviations for grade level…

Lakeland Tech Prep Consortium, Kirtland, OH.

481

Managing Technostress: Optimizing the Use of Computer Technology.  

ERIC Educational Resources Information Center

Afraid of change, many employees refuse to join the computer revolution. The author states that only understanding and proper training can break down such resistance. The term "technostress" is described and the importance of employee self-assessment is examined. (CT)

Brod, Craig

1982-01-01

482

Future of computing technology in physics - the potentials and pitfalls  

SciTech Connect

The impact of the developments of modern digital computers is discussed, especially with respect to physics research in the future. The effects of large data processing capability and increasing rates at which data can be acquired and processed are considered. (GHT)

Brenner, A.E.

1984-02-01

483

Business and Technology Concepts--Business Computations. Teacher's Guide.  

ERIC Educational Resources Information Center

This Illinois State Board of Education teacher's guide on business computations is for students enrolled in the 9th or 10th grade. The course provides a foundation in arithmetic skills and their applications to common business problems for the senior high school vocational business courses. The curriculum guide includes teacher and student…

Illinois State Board of Education, Springfield. Dept. of Adult, Vocational and Technical Education.

484

Computers in Special Education: A Practical Approach to New Technology.  

ERIC Educational Resources Information Center

Describes a computer-assisted instruction project for exceptional children at a rural school district. Five microcomputers were purchased and distributed, in rotation, to the 23 schools in the district for use by 570 learning disabled and 400 gifted students. Results were promising for all concerned. (TE)

Babcock, Nancy L.

1984-01-01

485

SAMGrid experiences with the Condor technology in Run II computing  

SciTech Connect

SAMGrid is a globally distributed system for data handling and job management, developed at Fermilab for the D0 and CDF experiments in Run II. The Condor system is being developed at the University of Wisconsin for management of distributed resources, computational and otherwise. We briefly review the SAMGrid architecture and its interaction with Condor, which was presented earlier. We then present our experiences using the system in production, which have two distinct aspects. At the global level, we deployed Condor-G, the Grid-extended Condor, for the resource brokering and global scheduling of our jobs. At the heart of the system is Condor's Matchmaking Service. As a more recent work at the computing element level, we have been benefiting from the large computing cluster at the University of Wisconsin campus. The architecture of the computing facility and the philosophy of Condor's resource management have prompted us to improve the application infrastructure for D0 and CDF, in aspects such as parting with the shared file system or reliance on resources being dedicated. As a result, we have increased productivity and made our applications more portable and Grid-ready. Our fruitful collaboration with the Condor team has been made possible by the Particle Physics Data Grid.

Baranovski, A.; Loebel-Carpenter, L.; Garzoglio, G.; Herber, R.; Illingworth, R.; Kennedy, R.; Kreymer, A.; Kumar, A.; Lueking, L.; Lyon, A.; Merritt, W.; Terekhov, I.; Trumbo, J.; Veseli, S.; White, S.; /Fermilab; St. Denis, R.; /Glasgow U.; Jain, S.; Nishandar, A.; /Texas U., Arlington

2004-12-01

486

Agent Technology: Computing as Interaction A Roadmap for Agent Based Computing  

E-print Network

Ambient Intelligence Peer-to-Peer Computing Service Oriented Computing Semantic Web Trust and Reputation IBM - Haifa Research Labs Haifa University Mount Carmel, Haifa 31905 Israel onn@il.ibm.com Steven

Luck, Michael

487

Mobile Agents for Wireless Computing: The Convergence of Wireless Computational Models with Mobile-Agent Technologies  

Microsoft Academic Search

Wireless mobile computing breaks the stationary barrier and allows users to compute and access information from anywhere and at anytime. However, this new freedom of movement does not come without new challenges. The mobile computing environment is constrained in many ways. Mobile elements are resource-poor and unreliable. Their network connectivity is often achieved through low-bandwidth wireless links. Furthermore, connectivity is

Constantinos Spyrou; George Samaras; Evaggelia Pitoura; Paraskevas Evripidou

2004-01-01

488

Use of personal computing technology by deaf-blind individuals  

Microsoft Academic Search

This paper describes a system that enables deaf-blind people to work with microcomputers. The system utilizes the International Morse Code as a general communication medium. The deaf-blind person hears Morse code via a vibrotactile device to see the computer's screen. This technique enables deaf-blind individuals to receive immediate feedback from their typing and to scan the screen. This makes it

Dan Zuckerman

1984-01-01

489

Vibration motions studied by Heterodyne Holography , F. Verpillat1  

E-print Network

of phase shifting holography [3] that control the reference arm phase with acousto optic modulators and signal arms, heterodyne holography is well adapted to vibration analysis. Vibration sidebands can be imaged and stroboscopic measurement sensitive to mechanical phase can be made. OCIS codes: (090

Paris-Sud XI, Université de

490

Imaging velocities of a vibrating object by stroboscopic sideband holography  

E-print Network

Imaging velocities of a vibrating object by stroboscopic sideband holography F. Verpillat,1 F. Joud.gross@univ-montp2.fr* Abstract: We propose here to combine sideband holography with stroboscopic illumination the instantaneous velocities of the object. Since the stroboscopic illumination is made with an electronic device

Paris-Sud XI, Université de

491

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

E-print Network

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

Rosen, Joseph

492

Laser Holography. High Tech with High Potential for Learning Activities.  

ERIC Educational Resources Information Center

This article discusses the procedure, historical development, and applications of holography, and discusses the feasibility and value of implementing a unit or course of study of laser holography into an existing photography laboratory and curriculum. An equipment and supplies list, giving supplies and cost, is included. (CT)

Schlegel, Ronald D.

1986-01-01

493

Photoconductive Plastic Holography Employing White-Light Laser  

NASA Astrophysics Data System (ADS)

We have succeeded in quasi real-time holography engineering by using a photoconductive plastic (PCP) plate and in full-color holography engineering by employing a hollow-cathode type, He-Cd+, white-light laser. We have also succeeded in eliminating ghost images, which are inherent in holograms reconstructed from multiwavelength light, using diffused reference illumination.

Uno, Katsuhiro; Mano, Norihito; Saruta, Koichi; Fujii, Kan-ichi; Shimizu, Isao; Tokita, Yasuhiro

2001-10-01

494

Imaging nanoparticles in cells by nanomechanical holography  

NASA Astrophysics Data System (ADS)

Nanomaterials have potential medical applications, for example in the area of drug delivery, and their possible adverse effects and cytotoxicity are curently receiving attention. 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 important. 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.

Tetard, Laurene; Passian, Ali; Venmar, Katherine T.; Lynch, Rachel M.; Voy, Brynn H.; Shekhawat, Gajendra; Dravid, Vinayak P.; Thundat, Thomas

2008-08-01

495

Schrödinger Holography with and without Hyperscaling Violation  

E-print Network

We study the properties of the Schr\\"odinger-type non-relativistic holography for general dynamical exponent z with and without hyperscaling violation exponent \\theta. The scalar correlation function has a more general form due to general z as well as the presence of \\theta, whose effects also modify the scaling dimension of the scalar operator. We propose a prescription for minimal surfaces of this "codimension 2 holography," and demonstrate the (d-1) dimensional area law for the entanglement entropy from (d+3) dimensional Schr\\"odinger backgrounds. Surprisingly, the area law is violated for d+1 < z < d+2, even without hyperscaling violation, which interpolates between the logarithmic violation and extensive volume dependence of entanglement entropy. Similar violations are also found in the presence of the hyperscaling violation. Their dual field theories are expected to have novel phases for the parameter range, including Fermi surface. We also analyze string theory embeddings using non-relativistic branes.

Bom Soo Kim

2012-06-28

496

Negative magnetoresistivity in chiral fluids and holography  

E-print Network

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

Landsteiner, Karl; Sun, Ya-Wen

2014-01-01

497

Holography, CFT and Black Hole Entropy  

E-print Network

Aspects of holography or dimensional reduction in gravitational physics are discussed with reference to black hole thermodynamics. Degrees of freedom living on Isolated Horizons (as a model for macroscopic, generic, eternal black hole horizons) are argued to be topological in nature and counted, using their relation to two dimensional conformal field theories. This leads to the microcanonical entropy of these black holes having the Bekenstein-Hawking form together with finite, unambigious {\\it quantum spacetime} corrections. Another aspect of holography ensues for radiant black holes treated as a standard canonical ensemble with Isolated Horizons as the mean (equilibrium) configuration. This is shown to yield a universal criterion for thermal stability of generic radiant black holes, as a lower bound on the mass of the equilibrium isolated horizon in terms of its microcanonical entropy. Saturation of the bound occurs at a phase boundary separating thermally stable and unstable phases with symptoms of a first order phase transition.

Parthasarathi Majumdar

2008-02-11

498

Imaging nanoparticles in cells by nanomechanical holography  

SciTech Connect

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.

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

499

Schrödinger wave holography in brain cortex  

NASA Astrophysics Data System (ADS)

An explanation for electroencephalogram (EEG) activity is proposed. Under suitable assumptions concerning the active transport of Na+-K+ ions through the glial tissue in brain cortex, a Schrödinger-like equation for ion displacement waves is easily obtained. Theoretical wave-propagator diagrams are in perfect agreement with experimental stimulus-response patterns directly recorded on brain cortexes. Conditions for effective Schrödinger wave holography and its greater efficiency in comparison with D'Alembert wave holography, are briefly discussed. The need for ``reference-wave'' recruiting device and for a receptor arrangement, for holographic information recovery in proximity of the signal sources, lead to brain-organization models in good agreement with diagrams reported by neurophysiologists.

Nobili, Renato

1985-12-01

500

Parallel, distributed and GPU computing technologies in single-particle electron microscopy  

PubMed Central

Most known methods for the determination of the structure of macromolecular complexes are limited or at least restricted at some point by their computational demands. Recent developments in information technology such as multicore, parallel and GPU processing can be used to overcome these limitations. In particular, graphics processing units (GPUs), which were originally developed for rendering real-time effects in computer games, are now ubiquitous and provide unprecedented computational power for scientific applications. Each parallel-processing paradigm alone can improve overall performance; the increased computational performance obtained by combining all paradigms, unleashing the full power of today’s technology, makes certain applications feasible that were previously virtually impossible. In this article, state-of-the-art paradigms are introduced, the tools and infrastructure needed to apply these paradigms are presented and a state-of-the-art infrastructure and solution strategy for moving scientific applications to the next generation of computer hardware is outlined. PMID:19564686

Schmeisser, Martin; Heisen, Burkhard C.; Luettich, Mario; Busche, Boris; Hauer, Florian; Koske, Tobias; Knauber, Karl-Heinz; Stark, Holger

2009-01-01