Note: This page contains sample records for the topic computer technology holography from Science.gov.
While these samples are representative of the content of Science.gov,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of Science.gov
to obtain the most current and comprehensive results.
Last update: November 12, 2013.
1

Advanced Technology Development Multi-Color Holography.  

National Technical Information Service (NTIS)

This is the final report of the Multi-color Holography project. The comprehensive study considers some strategic aspects of multi-color holography. First, various methods of available techniques for accurate fringe counting are reviewed. These are heterod...

C. S. Vikram

1993-01-01

2

Acoustic Holography in-Solids for Computer-Human Interaction  

Microsoft Academic Search

Abstract Computer-Human Interfaces can be generally categorisedinto two groups, tangible and intangible. The most commonly used computer input devices such as keyboards, touch-pads or touch-screens are tangible. In this paper a new approach to the development,of tangible acoustic interfaces based on acoustic holography is described. The principle of acoustic holography in solid is described and the achieved theoretical results are

W. Rolshofen; M. Yang; Z. Wang

3

Advanced Technology Development Multi-Color Holography.  

National Technical Information Service (NTIS)

Several key aspects of multi-color holography and some non-conventional ways to study the holographic reconstructions are considered. The error analysis of three-color holography is considered in detail with particular example of a typical triglycine sulf...

C. S. Vikram

1994-01-01

4

Holography.  

ERIC Educational Resources Information Center

|Holography is a process which numbers among its many applications the creation of holograms--unique three dimensional photographs that show spatial relations and shifts just as they exist in reality. This book recounts the history of holography, tracing its development from Euclid's theory of light rays through Huygens' theory of wave motion to…

Klein, H. Arthur

5

Holography: art in space of technology  

Microsoft Academic Search

Contents: Preface \\/ Rodney Wilson -- Foreword \\/ Will Bell -- 1. Introduction. Technology and the (trans)formation of culture \\/ Philip Hayward -- 2. How intimate can art and technology really be?: a survey of the art and technology movement of the sixties \\/ Marga Bijvoet -- 3. From abstraction to simulation: notes on the history of computer imaging \\/

Rebecca Coyle

1990-01-01

6

Complete oral rehabilitation with implants using CAD/CAM technology, stereolithography, and conoscopic holography.  

PubMed

A 64-year-old totally edentulous female initially presented with ill-fitting removable prostheses. A comprehensive treatment plan with dental implants was accepted by the patient. Clinical and laboratory procedures were executed using various computer technologies including computed tomography, rapid prototyping, and optical scanning using conoscopic holography. A review of the patient's treatment and various modalities used are the focus of this patient report. PMID:22223191

Bentz, Robert M; Balshi, Stephen F

2012-02-01

7

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

8

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 ...

Thackeray, Mrs.

2007-10-14

9

EDITORIAL: Optical tomography and digital holography  

Microsoft Academic Search

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

Jeremy Coupland; Julia Lobera

2008-01-01

10

Computer Simulations and Experiments on One-Dimensional Ultrasonic Holography.  

National Technical Information Service (NTIS)

Theoretical studies on the lateral resolution of ultrasonic holography is pursued. The theory is verified by simulations and experiments. The holograms are calculated using trigonometrical methods. The backward propagation method is used when reconstructi...

K. Tervola E. Alasaarela

1981-01-01

11

Compressive Holography  

NASA Astrophysics Data System (ADS)

Compressive holography estimates images from incomplete data by using sparsity priors. Compressive holography combines digital holography and compressive sensing. Digital holography consists of computational image estimation from data captured by an electronic focal plane array. Compressive sensing enables accurate data reconstruction by prior knowledge on desired signal. Computational and optical co-design optimally supports compressive holography in the joint computational and optical domain. This dissertation explores two examples of compressive holography: estimation of 3D tomographic images from 2D data and estimation of images from under sampled apertures. Compressive holography achieves single shot holographic tomography using decompressive inference. In general, 3D image reconstruction suffers from underdetermined measurements with a 2D detector. Specifically, single shot holographic tomography shows the uniqueness problem in the axial direction because the inversion is ill-posed. Compressive sensing alleviates the ill-posed problem by enforcing some sparsity constraints. Holographic tomography is applied for video-rate microscopic imaging and diffuse object imaging. In diffuse object imaging, sparsity priors are not valid in coherent image basis due to speckle. So incoherent image estimation is designed to hold the sparsity in incoherent image basis by support of multiple speckle realizations. High pixel count holography achieves high resolution and wide field-of-view imaging. Coherent aperture synthesis can be one method to increase the aperture size of a detector. Scanning-based synthetic aperture confronts a multivariable global optimization problem due to time-space measurement errors. A hierarchical estimation strategy divides the global problem into multiple local problems with support of computational and optical co-design. Compressive sparse aperture holography can be another method. Compressive sparse sampling collects most of significant field information with a small fill factor because object scattered fields are locally redundant. Incoherent image estimation is adopted for the expanded modulation transfer function and compressive reconstruction.

Lim, Se Hoon

12

Synthetic Aperture Image Holography.  

National Technical Information Service (NTIS)

The paper describes the underwater imaging method of 'Synthetic Aperture Image Holography' which has real-time imaging capability. The method utilizes image holography and computer synthetic aperture techniques. The imaging system consists of the acoustic...

T. Sato J. S. Jaffe

1985-01-01

13

Computational holography: the real 3-D by fast wave-field rendering in ultra high resolution  

Microsoft Academic Search

James Cameron's Avatar pioneered 3-D films in practical meaning. All audiences of the movie were happy even though their eye points were fixed when they were watching the movie. However, there are certain area that fixed eye points are not acceptable. This is why the authors focus on Computational Holography (see Fig. 1).

Kyoji Matsusima; Masaki Nakamura; Sumio Nakahara; Ichiroh Kanaya

2010-01-01

14

Radio holography and optical processing of data in microwave technology  

Microsoft Academic Search

Papers are presented on such topics as real-time longwave acoustical and microwave holography, electronic equipment for recording the amplitude-phase distributions of acoustic fields, holographic interferometry methods for the visualization of microwave fields, the resolving power of radio holograms, and the reconstruction of antenna radiation patterns from near-field measurements on cylindrical surfaces. Consideration is also given to planar radio-optic antenna arrays,

L. D. Bakhrakh; A. P. Kurochkin

1980-01-01

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

Computer generated holography using a graphics processing unit  

NASA Astrophysics Data System (ADS)

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

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

2006-01-01

17

Computer generated holography using a graphics processing unit.  

PubMed

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

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

2006-01-23

18

Advanced holography in high school  

NASA Astrophysics Data System (ADS)

Teaching advanced holography to secondary students is tremendously rewarding, and at the same time presents many challenges. IN this paper, we describe our experiences teaching an advanced holography course as part of the Photonics Program at the Columbia Area Career Center in Columbia, Missouri. We also discuss how training in holography- using both simple and advanced techniques and equipment- prepares students for a variety of vocations involving laser technology.

John, Pearl V.

2000-10-01

19

Computed tomography of cylindrically symmetric object by use of digital holography  

NASA Astrophysics Data System (ADS)

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

Pan, Zhelang; Li, Shiping; Zhong, Jingang

2013-04-01

20

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

21

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

22

Holography reinvented  

NASA Astrophysics Data System (ADS)

This paper is entitled Holography Reinvented, because its theme is simply that each of the three best-known names in holography made their discoveries and inventions without knowing about the work of any the others; that is, each of them invented or reinvented holography, as it were. This is largely a presentation of anecdotal remarks drawn from conversations, observations drawn from historical documents, including some from the Museum of Holography files now at the MIT Museum, and observations drawn from the author's own experiences as holography has evolved. As such, any errors of fact or interpretation are entirely the author's own, as is the slant toward imaging or display holography that will be conspicuous. The three main players are Professors Denis Gabor, Emmett Leith, and Juri Denisyuk. A few other names will come into the story as well, notably: Pieter van Heerden (my former colleague at the Polaroid Research Labs) and Hussein M.A. El-Sum, among others.

Benton, Stephen A.

2002-07-01

23

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

24

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

25

Real-time 'computer-evaded' pseudo-holography of computed tomography images.  

PubMed

An off-line method of dynamic imaging has been developed to facilitate visualization of three-dimensional tomographic data during real-time manoeuvres. Stereo-pair projection of multiple contiguous cross-sectional images on a conventional 625 line 50 Hz television raster has been investigated and pseudo-holograms have been displayed. A Cartesian stereo-pair projection model incorporating three degrees of rotational freedom and perspective has been developed. Computer simulations of the model have been conducted and the feasibility of adopting a simplified model has been examined. A condensed solution with two degrees of freedom, retaining partial perspective effects, has been simulated and analysed for worst-case errors. Reasonable projection accuracy has been demonstrated for small orientation angles. Specialized display hardware has been developed and a departure has been made from conventional picture-element (pixel) display methodology. Elemental quadrilaterals (rho-pixels), varying in size, shape and screen position, have been considered as an alternative to static square pixels in a rigid matrix. Joystick-controlled rho-pixel arrays have been implemented with parallelogram-shaped rho-pixels incorporated as a simplified case of quadrilateral projection. Dynamic stereo-pair projections of 64 X 64 rho-pixel arrays have been generated from computed tomography (CT) images and the results of phantom studies on a four-plane system are discussed. PMID:2755267

Webb, J A; Noblett, D H

26

Computer Technology in Adult Education.  

ERIC Educational Resources Information Center

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

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

27

Holography techniques and applications  

SciTech Connect

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

Not Available

1988-01-01

28

Digital Holography.  

National Technical Information Service (NTIS)

Holography is frequently used to provide scientific data such as the size and shape of objects. Extracting the desired data from holograms presents a challenge. This is typically done by taking snapshots of the hologram at various viewing angles and using...

R. M. Powell

2000-01-01

29

Incoherent holography  

Microsoft Academic Search

Dennis Gabor invented in-line holography in 1947, but at that time the coherent light from a laser did not yet exist and therefore the holograms he produced were of very low quality. When the laser was born in 1960 beautiful 3-D off- center holograms were for the first time produced by Emmett Leith and Juris Upatnieks. However, already as early

Nils H. Abramson

2000-01-01

30

Digitized holography: modern holography for 3D imaging of virtual and real objects.  

PubMed

Recent developments in computer algorithms, image sensors, and microfabrication technologies make it possible to digitize the whole process of classical holography. This technique, referred to as digitized holography, allows us to create fine spatial three-dimensional (3D) images composed of virtual and real objects. In the technique, the wave field of real objects is captured in a wide area and at very high resolution using the technique of synthetic aperture digital holography. The captured field is incorporated in virtual 3D scenes including two-dimensional digital images and 3D polygon mesh objects. The synthetic field is optically reconstructed using the technique of computer-generated holograms. The reconstructed 3D images present all depth cues like classical holograms but are digitally editable, archivable, and transmittable unlike classical holograms. The synthetic hologram printed by a laser lithography system has a wide viewing zone in full-parallax and give viewers a strong sensation of depth, which has never been achieved by conventional 3D systems. A real hologram as well as the details of the technique is presented to verify the proposed technique. PMID:22193018

Matsushima, Kyoji; Arima, Yasuaki; Nakahara, Sumio

2011-12-01

31

Research Program in Computer Technology.  

National Technical Information Service (NTIS)

The research is aimed at applying computer science and technology to problem areas of high DoD/military impact. The ISI program consists of eight research areas: Program Verification -- logical proof of program validity; Programming Research Instrument --...

K. W. Uncapher

1976-01-01

32

Research Program in Computer Technology.  

National Technical Information Service (NTIS)

This report summarizes the research performed by USC/Information Sciences Institute from July 1, 1986, to November 30, 1987, for the Defense Advanced Research Projects Agency. The research is focused on the development of computer science and technology, ...

1990-01-01

33

Internet Archive: Computers & Technology  

NSDL National Science Digital Library

The history of modern computing is a truly fascinating subject, and the folks at the Internet Archive have created this delightful collection of videos that document many recent developments in the field. The backbone of the 2,100 item collection is the inclusion of Computer Chronicles and Net Cafe. Computer Chronicles was a program hosted by Stewart Cheifet, broadcast from 1983 to 2002. Visitors can watch over 560 episodes of the program, which covers everything from color printers to trade shows. Moving on, visitors can view past episodes of Net Cafe, which was broadcast from 1996 to 2002. This weekly program went behind the scenes of what used to be known as the World Wide Web, and it was produced on location at Internet cafes around the Bay Area and Silicon Valley. The site is rounded out by other programs on internet governance and documentaries on Bulletin Board Services (BBS).

2012-04-06

34

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

35

Dynamic display of 3D objects in real and virtual spaces with computer-generated holography  

Microsoft Academic Search

In this paper a new holographic 3D display system based on computer-generated hologram (CGH) is developed for the reconstruction of 3D objects. A new algorithm is also developed to reduce the hologram computation time and memory usage. The dynamic 3D objects are successfully reconstructed at video rates in both real and virtual spaces.

Xuewu Xu; Sanjeev Solanki; Xinan Liang; Shuhong Xu; Ridwan Bin Adrian Tanjung; Yuechao Pan; Farzam Farbiz; Baoxi Xu; Tow-chong Chong

2008-01-01

36

Computed tomography: A versatile technology  

SciTech Connect

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

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

1997-02-01

37

Helsinki University of Technology: Computational Information Technology  

NSDL National Science Digital Library

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

38

Captology: Computers as Persuasive Technologies  

NSDL National Science Digital Library

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

39

Exploratory Study on Computer Forensics Technology  

Microsoft Academic Search

The study of computer forensics technology signify much to attacking computer crime, invasion hunting, patch safety-bug, perfect safety system of network. This text makes a thorough and compact study on advancing computer forensics technology both at home and abroad; make an introduction of advancing technology, such as, dynamic computer forensics based on data mining, dynamic computer forensics based on Multi-agent,

Dan Hu

2009-01-01

40

Digital holography: 30 years later  

NASA Astrophysics Data System (ADS)

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

Yaroslavsky, Leonid P.

2002-06-01

41

Computer Technology. Career Education Guide.  

ERIC Educational Resources Information Center

The curriculum guide is designed to provide students with realistic training in computer technology theory and practice within the secondary educational framework and to prepare them for entry into an occupation or continuing postsecondary education. Each unit plan consists of a description of the area under consideration, estimated hours of…

Dependents Schools (DOD), Washington, DC. European Area.

42

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

NASA Astrophysics Data System (ADS)

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

Huang, Sujuan; Wang, Duocheng; He, Chao

2012-11-01

43

Laser Holography in Dentistry.  

National Technical Information Service (NTIS)

Laser holography provides a relatively new method to three-dimensionally record and non-destructively test dental objects. The basic concepts, varieties, and applications of dental laser holography are explained, including: reflection, transmission, and r...

J. M. Young B. R. Altschuler

1977-01-01

44

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

45

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

46

Business of holography is undergoing a paradigm shift  

Microsoft Academic Search

The business of holography is undergoing a paradigm shift, a shift that will usher in great opportunity. What was once considered a limited technology will become a premier enabling technology. With the achievement of the holy grail of holography -- full, true-color, real-time, holographic images -- business uses of the three-dimensional images will increase dramatically. The advent of live, interactive,

James C. Fischbach

1995-01-01

47

Ophthalmic adaptive optics by digital holography  

NASA Astrophysics Data System (ADS)

We are developing adaptive optics systems for aberration corrections in retinal imaging based on digital holography. Compared to existing technologies of adaptive optics, our systems do not have hardware components such as lenslet arrays or deformable mirrors. Instead, wavefront sensing and correction are done by acquisition and numerical manipulation of optical phase by digital holography, thereby substantially reducing hardware complexity and introducing novel imaging capabilities. Experimental results are presented to demonstrate capabilities of this novel imaging system.

Kim, Myung K.; Liu, Changgeng

2013-02-01

48

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

49

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

50

Electroholographic display unit for three-dimensional display by use of special-purpose computational chip for holography and reflective LCD panel  

NASA Astrophysics Data System (ADS)

We developed an electroholography unit, which consists of a special-purpose computational chip for holography and a reflective liquid-crystal display (LCD) panel, for a three-dimensional (3D) display. The special-purpose chip can compute a computer-generated hologram of 800×600 grids in size from a 3D object consisting of approximately 400 points in approximately 0.15 seconds. The pixel pitch and resolution of the LCD panel are 12 ?m and 800×600 grids, respectively. We implemented the special purpose chip and LCD panel on a printed circuit board of approximately 28cm×13cm in size. After the calculation, the computer-generated hologram produced by the special-purpose chip is displayed on the LCD panel. When we illuminate a reference light to the LCD panel, we can observe a 3D animation of approximately 3cm×3cm×3cm in size. In the present paper, we report the electroholographic display unit together with a simple 3D display system.

Shimobaba, Tomoyoshi; Shiraki, Atsushi; Masuda, Nobuyuki; Ito, Tomoyoshi

2005-05-01

51

Electroholographic display unit for three-dimensional display by use of special-purpose computational chip for holography and reflective LCD panel.  

PubMed

We developed an electroholography unit, which consists of a special-purpose computational chip for holography and a reflective liquid-crystal display (LCD) panel, for a three-dimensional (3D) display. The special-purpose chip can compute a computer-generated hologram of 800x600 grids in size from a 3D object consisting of approximately 400 points in approximately 0.15 seconds. The pixel pitch and resolution of the LCD panel are 12 mum and 800x600 grids, respectively. We implemented the special purpose chip and LCD panel on a printed circuit board of approximately 28cmx13cm in size. After the calculation, the computer-generated hologram produced by the special-purpose chip is displayed on the LCD panel. When we illuminate a reference light to the LCD panel, we can observe a 3D animation of approximately 3cmx3cmx3cm in size. In the present paper, we report the electroholographic display unit together with a simple 3D display system. PMID:19495333

Shimobaba, Tomoyoshi; Shiraki, Atsushi; Masuda, Nobuyuki; Ito, Tomoyoshi

2005-05-30

52

Art and Technology: Computers in the Studio?  

ERIC Educational Resources Information Center

|Because the graphic industry demands graduates with computer skills, art students want college programs that include complex computer technologies. However, students can produce good computer art only if they have mastered traditional drawing and design skills. Discusses designing an art curriculum including both technology and traditional course…

Ruby-Baird, Janet

1997-01-01

53

Computer Technology and Applications to Education.  

National Technical Information Service (NTIS)

The electronic computer, mainstay of an advanced information processing technology, is described as being central to the solution of information management and control problems in education. Current applications of computer and information system technolo...

I. R. Sternlicht T. C. Rowan

1964-01-01

54

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

55

Holography in Japan  

Microsoft Academic Search

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

Toshihiro Kubota

1998-01-01

56

AAAE Members' Computer Technology Assessment  

Microsoft Academic Search

The purpose was to identify AAAE members' computer anxiety levels, attitudes toward computers and perceptions of Web-based survey methods. A total of 389 AAAE members participated in this experimental study. Respondents were assigned randomly to Web- and paper- based data collection method subgroups. AAAE members perceived that they did not suffer from computer anxiety, held positive attitudes toward computers and

Gary J. Wingenbach; M. Damon Ladner; Michael E. Newman; Matt R. Raven

2003-01-01

57

Information Security Technology Based on DNA Computing  

Microsoft Academic Search

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

Guangzhao Cui; Limin Qin; Yanfeng Wang; Xuncai Zhang

2007-01-01

58

Computer Technology in Nursing: A Comprehensive Bibliography.  

National Technical Information Service (NTIS)

Computer technology is one of the new automation innovations impacting health care today. There are no neatly packaged courses which provide nurses with state-of-the-art information in computer technology. The purpose of this publication is to provide nur...

1980-01-01

59

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

60

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

61

Computer technology in data-base publishing  

Microsoft Academic Search

The experience and the expectations of a large scientific society publisher of chemical and chemical engineering information tools provide a broad context for considering the history and probable future impact of computer technology on information dissemination. Chemical Abstracts Service (CAS) was in good health for half a century before computer technology was available in practical application to the production of

D. B. Baker; R. E. O'dette

1977-01-01

62

Moral Responsibility and Computer Technology.  

ERIC Educational Resources Information Center

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

Friedman, Batya

63

3D Measurement Technologies for Computer Animation  

Microsoft Academic Search

This paper surveys 3D measurement technologies for computer animation and considers unsolved problems on this subject. 3D measurement technologies are actually very important for converting various 3D objects in the real world to 3D models in the virtual world for computer animation. Current 3D measurement technologies have been developed mainly for measuring objects in industrial or scientific fields, such as

Yasuhito Suenaga

1996-01-01

64

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

65

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

66

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.

67

When Computer Technologies Meet the Learning Sciences  

Microsoft Academic Search

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

John Bransford; Sean Brophy; Susan Williams

2000-01-01

68

Computer Sciences and Technology: Computer Peripheral Memory System Forecast.  

National Technical Information Service (NTIS)

This document describes and forecasts computer peripheral memory technologies as displayed by U.S. research and manufacturing facilities. Specifically, both technical and economic criteria are discussed. The presented peripheral memories include contempor...

R. B. J. Warnar P. J. Calomeris S. A. Recicar

1979-01-01

69

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.

70

Art Therapists and Computer Technology  

ERIC Educational Resources Information Center

The purpose of this study was to understand the impact of technology on art therapists by exploring how art therapists own and use technology and to determine barriers to ownership and use. A survey was conducted at the 2002 annual conference of the American Art Therapy Association in Washington, DC. Of the 250 surveys distributed, 195 were…

Peterson, Brent C.; Stovall, Kay; Elkins, David E.; Parker-Bell, Barbara

2005-01-01

71

International technology diffusion in Computers & Communications Field  

Microsoft Academic Search

Researches in technology diffusion is popular in economics; however most papers focus on geographical pattern. In this research, we examined the international technology diffusion by using patent citations and focused on Computers and Communications field to investigate technology in-flow and out-flow between countries. The results indicate that technology diffusion of this field is more significant intra-field, differing by countries. It

Chun-chieh Wang; Dar-zen Chen; Mu-hsuan Huang

2010-01-01

72

Theory-Guided Technology in Computer Science  

NASA Astrophysics Data System (ADS)

Scientists usually identify themselves as either theoreticians or experimentalists, while technology - the application of science in practice - is done by engineers. In computer science, these distinctions are often blurred. This paper examines the history of major achievements in computer science as portrayed by the winners of the prestigious Turing Award and identifies a possibly unique activity called Theory-Guided Technology (TGT). Researchers develop TGT by using theoretical results to create practical technology. The reasons why TGT is practical in computer science are discussed, as is the cool reception that TGT has been received by software engineers.

Ben-Ari, Mordechai

73

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

74

Forecasting Methods for Computer Technology.  

National Technical Information Service (NTIS)

How well the computer site manager avoids future dangers and takes advantage of future opportunities depends to a considerable degree on how much anticipatory information he has available. People who rise in management are expected with each successive pr...

W. J. Worlton

1978-01-01

75

Digital holography microscopy (DHM) operating in pulsed stroboscopic mode: a versatile metrology instrument for micro and nano technology  

NASA Astrophysics Data System (ADS)

Process engineering and failure analysis of MEMS and MOEMS require static and dynamical characterization of both their in-plane and out of plane response to an excitation. A remarkable characteristic of Digital Holography Microscopes (DHM) is the extremely short acquisition time required to grab the whole information necessary to provide 3D optical topography of the sample: a unique frame grab, without any vertical or lateral scan provides the information over the full field of view. First, it ensures DHM measurements to be insensitive to vibrations. Second, it opens the door to fast dynamical characterization of micro-systems. For periodic movement analysis, DHM can operate in two stroboscopic modes with standard cameras. The first one enables precise characterization up to excitation frequencies of 100 kHz with recovery cycle of 10% simply by triggering properly the camera. The second one uses a pulsed source for investigation of higher excitation frequencies. For non periodic movement analysis fast acquisition cameras and postponed treatment are used. DHM are therefore unique and very efficient tool for dynamical characterization of in-plane and out-of-plane response. In this paper we illustrate the two stroboscopic modes with an example of a high frequency micro mirror.

Montfort, Frédéric; Marquet, François; Cuche, Etienne; Aspert, Nicolas; Solanas, Eduardo; Emery, Yves; Depeursinge, Christian

2007-10-01

76

Holography in Japan  

NASA Astrophysics Data System (ADS)

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

Kubota, Toshihiro

1998-02-01

77

Programming Technology for Molecular-Scale Computing.  

National Technical Information Service (NTIS)

Progress in molecular electronics is beginning to yield the technology for creating structures that incorporate myriads of nanoscale computationally active units. These could be fabricated at almost no cost, provided (1) the individual units need not all ...

H. Abelson G. J. Sussman T. F. Knight R. Nagpal

2004-01-01

78

Terahertz digital holography  

NASA Astrophysics Data System (ADS)

Terahertz wave (THz, also name T-Ray) belongs to far-infrared electromagnetic radiation. Since its unique properties, THz techniques have been paid more and more attentions during the past decades. In this field, THz digital holography is an important research branch, which can accurately extract three-dimensional optical information of objects. Based on features of this technique, it greatly reduces the experimental time and clearly presents the diffraction phenomena of the transmitted THz waves. We elucidated our works about the THz digital holography in recent years. Some key techniques in the THz digital holography are selected as research objects, which are the reflection measurement, quasi-near-field measurement, balanced electro-optic (EO) imaging, and polarization detection. From these four aspects, including the measurement mode, improvement of the spatial resolution, optimization of the signal to noise ratio (SNR), and acquirement of the polarization information, the THz digital holography imaging system has been investigated experimentally and theoretically. These works enhance the performances of the system and promote the practicability of the THz digital holography. Although there are a lot of theoretical and technical difficulties to be overcome in the practical applications, it is firmly believed that the THz digital holography will present strong abilities in factory and research fields in the future.

Wang, Xinke; Cui, Ye; Sun, Wenfeng; Zhang, Yan

2011-11-01

79

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

80

Sandia technology. [CHEMKIN computer code  

Microsoft Academic Search

The following topics are discussed: the physical and chemical processes inside operating internal combustion engines which are being studied to improve IC engine performance; the CHEMKIN computer code for theoretical modeling studies of combustion kinetics; an acoustic thermometer capable of measuring temperatures to 3000°C and which can be used in reactor safety studies; and the new application of inertial navigational

Thornbrough

1983-01-01

81

Reliability testing technology for computer network applications  

Microsoft Academic Search

Computer network reliability testing is an important technology for network reliability evaluation. Focused on reliability testing for computer network applications, the testing profile building method, the sample selection method, the failure criterions setting method and the index evaluation method are researched. Finally, the testing process is explained with a testing case.

Ruiying Li; Ning Huang; Shuo Li; Rui Kang; Shuo Chang

2009-01-01

82

Computer Technology and the Social Studies.  

ERIC Educational Resources Information Center

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

Glenn, Allen D.; Klassen, Daniel L.

1983-01-01

83

On the Emergence of New Computer Technologies  

ERIC Educational Resources Information Center

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

Asaolu, Olumuyiwa Sunday

2006-01-01

84

Meeting Seniors' Information Needs: Using Computer Technology  

Microsoft Academic Search

This article discusses the design and development of a program to integrate computer technology into two Nurse Wellness Centers located in low-income minority high-rise facilities. The goal of the program is to teach residents how to use the computers and the Internet to locate health information and to take a more active role in their own health care. Previous research

Robert James Campbell

2008-01-01

85

Computers, Technology, and People with Disabilities.  

ERIC Educational Resources Information Center

This brochure presents an overview of adaptive computing technology and how it can help people with disabilities participate more fully in society. It defines key terms (such as "disability" and "access barriers") and briefly summarizes provisions of major laws: the Americans with Disabilities Act of 1990, the Technology-Related Assistance Act,…

American Council on Education, Washington, DC. HEATH Resource Center.

86

Implementing Computer Technologies: Teachers' Perceptions and Practices  

ERIC Educational Resources Information Center

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

Wozney, Lori; Venkatesh, Vivek; Abrami, Philip

2006-01-01

87

Digital mammography performed with computed radiography technology  

Microsoft Academic Search

Introduced by Fuji Photo Film Japan in the early 1980s, computed radiography (CR) technology has developed considerably since then to become the mature widely installed technology it is today (about 7500 systems worldwide). Various mammographic examinations require high performance results to which CR complies on demand or following some procedures such as geometrical magnification carried out during the examination. The

Bernard Jouan

1999-01-01

88

Ensemble Subsurface Modeling Using Grid Computing Technology  

Microsoft Academic Search

Ensemble Kalman filter (EnKF) uses a randomized ensemble of subsurface models for error and uncertainty estimation. However, the complexity of geological models and the requirement of a large number of simulation runs make routine applications extremely difficult due to expensive computation cost. Grid computing technologies provide a cost-efficient way to combine geographically distributed computing resources to solve large-scale data and

Xin Li; Zhou Lei; Christopher D White; Gabrielle Allen; Guan Qin; F. T.-C. Tsai

2007-01-01

89

Ubiquitous computing: An overview of technology impacts  

Microsoft Academic Search

Ubiquitous computing is considered as a promising technological path of innovation. Intensive R&D activities and political strategies are addressing the objective to foster marketable technologies and applications. This article explores the state-of-the-art on the way towards the “Internet of things”. Which application fields have already proved their potential for realising the vision and promises related to the new technology? What

Michael Friedewald; Oliver Raabe

2011-01-01

90

An Introduction to Educational Holography.  

ERIC Educational Resources Information Center

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

Lloyd, R. Scott

91

Holography: origin, development, and beyond  

NASA Astrophysics Data System (ADS)

We shall discuss the origin, the development, and the future of holography. We shall show that basically there are two types of holography, namely the transmission-type of Leith and the reflection-type of Denisyuk. Although the original purpose for developing holography was to produce 3D imageries, it has a much wider domain of application far beyond the legacy.

Yu, Francis T. S.

2013-09-01

92

Sandia technology. [CHEMKIN computer code  

SciTech Connect

The following topics are discussed: the physical and chemical processes inside operating internal combustion engines which are being studied to improve IC engine performance; the CHEMKIN computer code for theoretical modeling studies of combustion kinetics; an acoustic thermometer capable of measuring temperatures to 3000/sup 0/C and which can be used in reactor safety studies; and the new application of inertial navigational techniques to more accurate wellbore surveys. (LCL)

Thornbrough, A.D. (ed.)

1983-02-01

93

Culture Computing: Interactive Technology to Explore Culture  

NASA Astrophysics Data System (ADS)

The present day rapid development of media science and digital technology is offering the modern generation more opportunities as well as challenges as the new fundamental literacy. Therefore, to reach the modern generation on issues such as an appreciation of cultures, we have to find common grounds based on digital media technology. In an increasingly hybrid cultural environment, interaction and fusion of cultural factors with the computer technology will be an investigation into the possibilities of providing an experience into the cultures of the world, operating in the environments the modern generation inhabits. Research has created novel merging of traditional cultures and literature with recent media literacy. Three cultural computing systems, Media Me, BlogWall and Confucius Computer, are presented in this chapter. Studies showed that users gave positive feedback to their experience of interacting with cultural computing systems.

Cheok, Adrian David

94

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

95

Use of laser holography for the measurement of teeth and orthodontic therapy  

NASA Astrophysics Data System (ADS)

Many attempts to introduce computer technology into the field of dentistry have been actively developed. Process prosthetics demands precise qualitative and quantitative estimations of information in dental topography. Procedures of laser holography and coherent optics permit us to carry out noncontactive topographical recording of the surface form of a subject under investigation. In the present study the precise 3D shape measurement of the abutment and other teeth was attempted by using a He-Ne laser displacement meter and a computer controlled scanning system of model teeth.

Tchurajev, Alexandr L.; Sukharev, Michail P.; Veselov, Victor N.; Dvoynikov, Slava

1994-09-01

96

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.

2011-09-01

97

Cloud Computing Technologies and Applications  

NASA Astrophysics Data System (ADS)

In a nutshell, the existing Internet provides to us content in the forms of videos, emails and information served up in web pages. With Cloud Computing, the next generation of Internet will allow us to "buy" IT services from a web portal, drastic expanding the types of merchandise available beyond those on e-commerce sites such as eBay and Taobao. We would be able to rent from a virtual storefront the basic necessities to build a virtual data center: such as CPU, memory, storage, and add on top of that the middleware necessary: web application servers, databases, enterprise server bus, etc. as the platform(s) to support the applications we would like to either rent from an Independent Software Vendor (ISV) or develop ourselves. Together this is what we call as "IT as a Service," or ITaaS, bundled to us the end users as a virtual data center.

Zhu, Jinzy

98

Simple wave-field rendering for photorealistic reconstruction in polygon-based high-definition computer holography  

NASA Astrophysics Data System (ADS)

A simple and practical technique is presented for creating fine three-dimensional (3D) images with polygon-based computer-generated holograms. The polygon-based method is a technique for computing the optical wave-field of virtual 3D scenes given by a numerical model. The presented method takes less computation time than common point-source methods and produces fine spatial 3D images of deep 3D scenes that convey a strong sensation of depth, unlike conventional 3D systems providing only binocular disparity. However, smooth surfaces cannot be reconstructed using the presented method because the surfaces are approximated by planar polygons. This problem is resolved by introducing a simple rendering technique that is almost the same as that in common computer graphics, since the polygon-based method has similarity to rendering techniques in computer graphics. Two actual computer holograms are presented to verify and demonstrate the proposed technique. One is a hologram of a live face whose shape is measured using a 3D laser scanner that outputs polygon-mesh data. The other is for a scene including the moon. Both are created employing the proposed rendering techniques of the texture mapping of real photographs and smooth shading.

Matsushima, Kyoji; Nishi, Hirohito; Nakahara, Sumio

2012-04-01

99

Grid Computing Using Web Services Technologies  

Microsoft Academic Search

Service-Oriented Architecture (SOA) is the contemporary paradigm of choice for developing scalable, loosely-coupled applications that span organisations. However the architectural paradigm that is SOA is often confused with the implementation technology that is Web Services. In this paper we aim to clarify the fundamental tenets of SOA and their relevance to Internet-scale computing (or Grid computing). We then show how

Savas Parastatidis; Paul Watson; Jim Webber

2004-01-01

100

Optical distributed sensing and computation for a proposed flexible beam experiment  

Microsoft Academic Search

A new technology is being developed that supports distributed sensing and computation wherein crystal mediums are used with real-time holography to gather images that contain vibration and instantaneous geometry data for a spacecraft. Optical computation techniques are employed to process the image data and to compute commands to actuators located on the spacecraft. This paper presents an integrated sensor\\/processor design

S. S. Welch

1989-01-01

101

Holography and Optical Storage  

NASA Astrophysics Data System (ADS)

The term holography is composed of the Greek words holos (= whole) and graphein (= to record, to write), and thus summarizes the key aspects of its underlying principle: recording the complete wavefront of an object, i.e., its intensity as well as its phase. Interference and diffraction phenomena are employed to record and retrieve the full information, a technique pioneered by Dennis Gabor in 1948. He was honored with the Nobel prize in Physics in 1971, reflecting the general impact of holography on modern physics.

Imlau, Mirco; Fally, Martin; Burr, Geoffrey W.; Sincerbox, Glenn T.

102

Computer Technology and College Students' Reading Habits  

Microsoft Academic Search

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

Li-Bi Shen

2006-01-01

103

Business/Computer Technologies. State Competency Profile.  

ERIC Educational Resources Information Center

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

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

104

Business/Computer Technologies. State Competency Profile.  

ERIC Educational Resources Information Center

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

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

105

Knowledge base systems in computer aided technology  

Microsoft Academic Search

The evolution of artificial intelligence technology over the past decade has lead to the development of a mature application area known as knowledge based systems. Knowledge base systems are computer programs capable of reasoning based on information maintained in a domain specific knowledge base. This paper describes the requirements of knowledge base system construction and discusses their relevance in the

John F. Gilmore

1984-01-01

106

Digital mammography performed with computed radiography technology.  

PubMed

Introduced by Fuji Photo Film Japan in the early 1980s, computed radiography (CR) technology has developed considerably since then to become the mature widely installed technology it is today (about 7500 systems worldwide). Various mammographic examinations require high performance results to which CR complies on demand or following some procedures such as geometrical magnification carried out during the examination. The basic CR principles and digital image processing as well as technical improvements are detailed in this study, which also includes a synthesis of the articles on CR mammographic applications referenced in the bibliography, focusing on strong points, limits and current methods of surpassing these limits. New CR technology development perspectives in mammography and computed assisted diagnosis (CAD) algorithms will allow wider use of this method in the near future. PMID:10477094

Jouan, B

1999-07-01

107

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

NASA Astrophysics Data System (ADS)

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

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

2011-01-01

108

Holography without Fuss.  

ERIC Educational Resources Information Center

|Outlines what a hologram is, the main types of holography, and how a simple system producing a white light reflection hologram can be set up in a school physics laboratory. Discusses the basic optics of the hologram and procedures and materials for making holograms in school. (YP)|

Davies, Steve

1989-01-01

109

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

110

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

Microsoft Academic Search

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

Yun Wang; James Cannady; James Rosenbluth

2005-01-01

111

Human-computer interaction in the new process technology  

Microsoft Academic Search

Systems technology has been changing its targets. This paper reviews human interaction issues in systems technology and discusses human-computer interaction in plant operation. Human-centered automation in the process industry requires the fusion of computer technology, observations in cognitive science and cooperation technology. Cooperative human-computer interaction is a solution for an intelligent manufacturing system.

Hirokazu Nishitani

1996-01-01

112

NASA Future Computing and Communications Technologies  

NSDL National Science Digital Library

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

113

Technologies for Achieving Field Ubiquitous Computing  

NASA Astrophysics Data System (ADS)

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

Nagashima, Akira

114

Reviews of computing technology: Client-server technology  

SciTech Connect

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

Johnson, S.M.

1990-09-01

115

Reviews of computing technology: Client-server technology  

SciTech Connect

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

Johnson, S.M.

1990-09-01

116

Parallel Computer Technology - A Solution for Automobiles?  

Microsoft Academic Search

This paper gives a short overview of the information technology in today's car electronics and software components, with main focus on the dramatically increasing intra-car-communication and the accumulative number of electronic control units due to the complexity of current new applications, e.g., the very new semi-autonomous car driving. It is shown how the car industry can learn from parallel computing

S. Aust; H. Richter

2009-01-01

117

Validation of the Principal's Computer Technology Survey  

Microsoft Academic Search

The purpose of this study was to provide a more in-depth analysis of the psychometric characteristics of the Principal's Computer Technology Survey (PCTS). The PCTS developmental process yielded a 40-item survey with groups of items comprising five subscales (i.e., curriculum integration, perceptions, acquired expertise, needs assessment, and professional development). Principals' responses to items within the five subscales was measured on

Lantry Brockmeier; Nicole Gibson

118

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

119

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

120

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

PubMed Central

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.

Rodriguez, Guillermo Lopez; Weber, Joshua; Sandhu, Jaswinder Singh; Anastasio, Mark A.

2011-01-01

121

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

122

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

123

Medical applications of holography  

NASA Astrophysics Data System (ADS)

From the various capabilities of holography for image processing and measuring purposes, holographic interferometric techniques have found more extended application in biological and medical research. Due to their special properties the different methods of holographic interferometry are applied to characteristic fields of biomedical investigations where--similar to nondestructive testing--vibration and deformation analysis is of interest. Features of holographic interferometry, such as the possibility of noncontactive, three-dimensional investigations with a large field-of-depth, are used with advantage. The main applications can be found in basic research e.g., in audiology, dentistry, opthalmology, and experimental orthopedics. Because of the great number of investigations and the variety of medical domains in which these investigations were performed this survey is confined to some characteristic examples. As in all fields of optics and laser metrology, a review on biomedical applications of holography would be incomplete if military developments and utilization were not mentioned. As demonstrated by selected examples, the increasing interlacing of science with the military does not stop at domains that traditionally are regarded as exclusively oriented to human welfare--like biomedical research. The term 'Star Wars Medicine', which becomes an increasingly popular expression for laser applications (including holography) in medicine, characterizes the consequences of this development.

von Bally, Gert

1991-11-01

124

Improving student retention in computer engineering technology  

NASA Astrophysics Data System (ADS)

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

Pierozinski, Russell Ivan

125

Simulation of the Lattice QCD and Technological Trends in Computation  

Microsoft Academic Search

Simulation of Lattice QCD is a challenging computational problem. Currently, technological trends in computation show multiple divergent models of computation. We are witnessing homogeneous multi-core architectures, the use of accelerator on-chip or off-chip, in addition to the traditional architectural models. On the verge of this technological abundance, assessing the performance trade-offs of computing nodes based on these technologies is of

K. Ibrahim; J. Jaeger; Z. Liu; L. N. Pouchet; P. Lesnicki; L. Djoudi; D. Barthou; F. Bodin; C. Eisenbeis; G. Grosdidier; O. Pene; P. Roudeau

2008-01-01

126

Orange computing: Challenges and opportunities for awareness science and technology  

Microsoft Academic Search

This paper presents a newly emerging technology called orange computing for humanistic care applications. Orange computing refers to health, happiness, and physiopsychological care computing, which focuses on designing algorithms and systems for enhancing body and mind balance. Compared with green computing, orange computing lays more emphasis on humanistic care, particularly the elderly or those who require a certain degree of

Jhing-Fa Wangt; Bo-Wei Chen

2011-01-01

127

Uncertainty-managed phase-shifting digital holography.  

PubMed

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

Hahn, Joonku; Kim, Hwi

2012-11-01

128

Digital holography and 3D imaging: introduction to feature issue.  

PubMed

This feature issue of Applied Optics on Digital Holography and 3D Imaging is the sixth of an approximately annual series. Forty-seven papers are presented, covering a wide range of topics in phase-shifting methods, low coherence methods, particle analysis, biomedical imaging, computer-generated holograms, integral imaging, and many others. PMID:23292430

Kim, Myung K; Hayasaki, Yoshio; Picart, Pascal; Rosen, Joseph

2013-01-01

129

Folding time into space: novel approaches to integral holography  

Microsoft Academic Search

This paper describes a novel computer technique for holography developed by the author called Speedograms. Using an existing 2-D animation program, this technique creates depth by moving different graphic elements at varying speeds over the screen. This method has the advantage of popular software and is the basis for development of an automated 2-D\\/3-D printer for photoresist. This paper also

Doris K. Vila

1993-01-01

130

Correction of anisoplanatic phase errors in digital holography  

Microsoft Academic Search

The quality of coherent images computed from digital holography or heterodyne array data is sensitive to phase errors of the reference and\\/or object beams. A number of algorithms exist for correcting phase errors in or very near the hologram plane. In the case of phase errors introduced a nonnegligible distance away from hologram plane, the resulting imagery exhibits anisoplanatism. A

Samuel T. Thurman; James R. Fienup

2008-01-01

131

Digital holography at the Ontario College of Art & Design  

NASA Astrophysics Data System (ADS)

A new generation of holographers bring to the medium, a knowledge of dimensional imaging, many of them with related skills learned in high school. Digital holography opens up a variety of techniques and processes, expands the user base and makes literally anything possible. Student artists at the Ontario College of Art & Design create thought provoking imagery from video, film, photography and computer graphics.

Page, Michael L.

2004-06-01

132

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

133

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

ERIC Educational Resources Information Center

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

Celik, Vehbi; Yesilyurt, Etem

2013-01-01

134

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

ERIC Educational Resources Information Center

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

Connecticut Industrial Arts Association.

135

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

ERIC Educational Resources Information Center

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

Connecticut Industrial Arts Association.

136

Computer and Imaging Technology's Impact on Stereotactic Neurosurgery  

Microsoft Academic Search

Many improvements in computer and imaging technology have occurred since the last meeting of the American Society for Stereotactic and Functional Neurosurgery in 1987. These improvements are leading to a much wider acceptance of computerization and computer-assisted surgical procedures in the stereotactic neurosurgery field. This paper surveys the current fields of computer and imaging technology and its relationship and impact

Bruce A. Kall

1992-01-01

137

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

ERIC Educational Resources Information Center

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

Pierre, Samuel

2001-01-01

138

Experiences and lessons learned offering certificates in computer technology  

Microsoft Academic Search

Our Computer Science Department applied for and received a grant of $280,000 to create and offer Certificates in 6 technical areas (Computing Technology Literacy, Dynamic Web Site Programming, UNIX System Administration, Database Application Development, TCP\\/IP Networking, and Advanced Software Engineering). The goal of the Grantor (Colorado Institute of Technology) was to increase the educational level of the technology workforce in

Noel F Lejeune

2006-01-01

139

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

140

Computer Graphics. Curriculum Guide for Technology Education.  

ERIC Educational Resources Information Center

This curriculum guide for a 1-quarter or 1-semester course in computer graphics is designed to be used with Apple II computers. Some of the topics covered include the following: computer graphics terminology and applications, operating Apple computers, graphics programming in BASIC using various programs and commands, computer graphics painting,…

Craft, Clyde O.

141

Relationships between Computer Self-Efficacy, Technology, Attitudes and Anxiety: Development of the Computer Technology Use Scale (CTUS)  

ERIC Educational Resources Information Center

|Two studies are reported which describe the development and evaluation of a new instrument, the Computer Technology Use Scale (CTUS), comprising three domains: computer self-efficacy, attitudes to technology, and technology related anxiety. Study 1 describes the development of the instrument and explores its factor structure. Study 2 used…

Conrad, Agatha M.; Munro, Don

2008-01-01

142

Experimental research of CCD/LCD in holography  

NASA Astrophysics Data System (ADS)

Holography has been widely applied in industry measurement, especially in 3D non-contact testing. Combining a high resolution charge-coupled device (CCD) with a phase modulating liquid crystal display (LCD), holographic interferogram recording and display could be realized by digital holographic technique. Digital holographic technique has a great number of important and practical applications. In the conventional holography hologram was detected and reconstructed by the holography panchromatic plate, or the photoconductive thermoplastic film, or the BSO crystal and etc. But in the digital holography--the numerical version of the conventional holographic technique, hologram is digitally detected by CCD and then displayed on the computer monitor. By reconstruction, the hologram is writted into LCD, then illuminating the LCD with the reference wave, the tested object may be reconstructed optically. In this paper the application technique of CCD/LCD in holography is theoretically studied and the bottle techniques have been solved. According to the resolving power of the CCD and LCD, the angle between the two interfering waves should be less than 3° for recording the interference fringes with high spatial frequency. The simple and prospective optical architecture is perhaps Twyman-Green interferometer for easy to adjust the required small angle between reference and tested object waves, and also optical path deference for satisfying the requirement of spatial and temporal coherence. The disadvantages of CCD/LCD digital holographic technique is the small separation angle between zero-order and +/-1-order diffraction. In order to separate +/-1-order from zero-order diffraction, the minimum fringe spacing formed by the interference of object wave with reference wave should satisfy the sampling theorem. This decides a relationship between the size of object and the recording distance, which will be discussed in detail in the following text. And also discussion about the experimental research of LCD in digital holography would be included in our paper.

Yin, Na; Li, Lintao; Wang, Hongtao; Guo, Fei; Wang, Wensheng

2008-03-01

143

Computing, information, and communications: Technologies for the 21. Century.  

National Technical Information Service (NTIS)

To meet the challenges of a radically new and technologically demanding century, the Federal Computing, Information, and Communications (CIC) programs are investing in long-term research and development (R and D) to advance computing, information, and com...

1998-01-01

144

The changing technologies underlying computer-aided design  

Microsoft Academic Search

Computing is coming to play an increasing role in the design process. However, the role of computer-aided design cannot be understood without taking into account the major quantitative and qualitative changes that occur regularly as generations of computers develop. Computing technology may be viewed as autonomously impacting society. However, it may also be viewed as a product of society, created

B R Gaines; M L G Shaw

1986-01-01

145

A Technology Assessment Methodology. Volume III. Computers-Communications Networks.  

National Technical Information Service (NTIS)

The paper describes a pilot computer technology assessment study. The study has as its goal the development and illustration of technological assessment methodology and in addition, as a secondary objective, the investigation of certain salient segments o...

H. V. O'Neill

1971-01-01

146

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

Microsoft Academic Search

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

Tadeusz M. Drzewiecki; Narciso F. Macia

2003-01-01

147

Computer Science and Technology: Computers, Personnel Administration, and Citizen Rights.  

National Technical Information Service (NTIS)

This study of computer use and privacy issues in personnel administration was conducted through an examination of pre-computer patterns of employer information collection and record-keeping about job applicants, employees, and format employees, noting the...

A. F. Westin

1979-01-01

148

The use of computers for engineering computations in communications technology  

Microsoft Academic Search

The principles of computer programming (particularly with FORTRAN) are briefly reviewed along with various methods of computational mathematics widely used in engineering practice; attention is given to the solution of linear and nonlinear equations, functional integration, the integration of ordinary differential equations, and matrix operations. Consideration is then given to the use of the computer to analyze electronic circuits and

B. A. Kalabekov

1981-01-01

149

Comparative digital holography  

NASA Astrophysics Data System (ADS)

We described a method for direct holographic comparison of the shape or the deformation of two objects when it is not necessary that both samples be located at the same place. In contrast to the well-known incoherent techniques based on inverse fringe projection, this new approach uses a coherent mask that is imaged onto a sample object that has a microstructure different from that of the master object. The coherent mask is created by digital holography to permit instant access to complete optical information on the master object at any wanted place. Transmission of the digital master holograms to the relevant places can be made with a broadband digital telecommunication network such as the Internet.

Osten, Wolfgang; Baumbach, Torsten; Jüptner, Werner

2002-10-01

150

Comparative digital holography.  

PubMed

We described a method for direct holographic comparison of the shape or the deformation of two objects when it is not necessary that both samples be located at the same place. In contrast to the well-known incoherent techniques based on inverse fringe projection, this new approach uses a coherent mask that is imaged onto a sample object that has a microstructure different from that of the master object. The coherent mask is created by digital holography to permit instant access to complete optical information on the master object at any wanted place. Transmission of the digital master holograms to the relevant places can be made with a broadband digital telecommunication network such as the Internet. PMID:18033356

Osten, Wolfgang; Baumbach, Torsten; Jüptner, Werner

2002-01-01

151

Interactive computer technology for skin cancer prevention targeting children  

Microsoft Academic Search

Background: Computer technology has become an integral part of health care, yet there have been few studies exploring the use of multimedia technology in the prevention of cancer, especially targeting children.Objective: The aims of this study were to develop and evaluate a new multimedia computer program for the primary prevention of skin cancer among a childhood population.Design and Participants: An

Robin L. Hornung; Peter A. Lennon; Joanne M. Garrett; Robert F. DeVellis; Peter D. Weinberg; Victor J. Strecher

2000-01-01

152

Conducting In Situ Evaluations for and With Ubiquitous Computing Technologies  

Microsoft Academic Search

To evaluate ubiquitous computing technologies, which may be embedded in the environment, embedded in objects, worn, or carried by the user throughout everyday life, it is essential to use methods that accommodate the often unpredictable, real-world environments in which the technologies are used. This article discusses how we have adapted and applied traditional methods from psychology and human-computer interaction, such

Sunny Consolvo; Beverly L. Harrison; Ian E. Smith; Mike Y. Chen; Katherine Everitt; Jon Froehlich; James A. Landay

2007-01-01

153

Computers--Teaching, Technology, and Applications.  

ERIC Educational Resources Information Center

|Includes "Managing Personality Types in the Computer Classroom" (Cocco); "External I/O Input/Output with a PC" (Fryda); "The Future of CAD/CAM Computer-Assisted Design/Computer-Assisted Manufacturing Software" (Fulton); and "Teaching Quality Assurance--A Laboratory Approach" (Wojslaw). (SK)|

Cocco, Anthony M.; And Others

1995-01-01

154

New Computational Technologies for Reliable Computer Simulation: Ideas and Implementation  

Microsoft Academic Search

The present work is devoted to one of the most challenging problems in mathematical modelling and numerical analysis, which also has great importance for most of applications in industry: reliable verification of accuracy of approximate solutions obtained via computer simulations. This task is strongly related to the so-called a posteriori error estimates, giving computable bounds for modelling errors of various

Antti Hannukainen; Sergey Korotov

155

Computer Science and Technology: Design Alternatives for Computer Network Security.  

National Technical Information Service (NTIS)

The security problems associated with a network of computers are an extension of those of stand-alone computer systems, but require additional security controls due to the distributed and autonomous nature of the network components. The purpose of this in...

G. D. Cole D. K. Branstad

1978-01-01

156

A Computational Technology Approach To Education  

NSDL National Science Digital Library

As technology is increasingly used in most facets of the workplace, it is imperative that primary and secondary schools and colleges help create a workforce capable of turning technological advancements into societal benefits. Such a workforce should possess strong backgrounds in math, science, and technology, and its numbers should be sustainable. Educators should use technology as the catalyst to transform instruction into a learner-centered and inquiry-based education, one in which students construct knowledge through their own investigations.

Yasar, Osman; Mallekal, Jose; Little, Leigh; Jones, Dawn

2008-06-07

157

Exploiting object technology in computer simulation  

Microsoft Academic Search

The object-oriented approach and its use in software construction has had an enormous impact on simulation modeling. In this paper, we overview the development of software engineering principles and the development of object technology, the techniques of object-orientation. We then show how object technology has been incorporated into simulation modeling. We conclude with a caveat about object technology.

Brian A. Malloy; Gerald Levasseur

1999-01-01

158

Computers, Technology, and the Reading Curriculum.  

ERIC Educational Resources Information Center

Using educational technology in reading instruction is one approach, among others, to assist students to increase reading skills. However, there are several reasons why technology is not increasingly used in the school setting, including lack of administrative support; failure to allocate a technology coordinator to help train teachers and…

Ediger, Marlow

159

A perspective on technical needs in computational structures technology  

NASA Astrophysics Data System (ADS)

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

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

1992-05-01

160

Using Pen-Based Computing in Technology for Health  

Microsoft Academic Search

\\u000a Advanced technologies open more possibilities to interact with computers in various different ways. Especially, pen-based\\u000a computing provides people with an intuitive way to use a computer. In this paper, we present our research on developing pen-based\\u000a neuropsychological assessment tools for older adults with cognitive impairment. First, we explain the background information\\u000a and motivation to design technology for the aging population.

Hyungsin Kim; Young Suk Cho; Ellen Yi-Luen Do

161

Kindergartners’ Conversations in a Computer-Based Technology Classroom  

Microsoft Academic Search

This qualitative study examined emerging inquiries and dialogue of five- to six-year-old kindergartners (9 boys and 9 girls) taking place around computers as they engaged in a mapping project in a technology-rich classroom in the U.S. Discourse analysis of young children's conversations in a technology-rich classroom shed light on their perceptions of computer-based technology as a learning tool. Key findings

Eunsook Hyun; Genevieve Davis

2005-01-01

162

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

163

Math Attitudes of Computer Education and Instructional Technology Students  

ERIC Educational Resources Information Center

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

Tekerek, Mehmet; Yeniterzi, Betul; Ercan, Orhan

2011-01-01

164

Fostering an Informal Learning Community of Computer Technologies at School  

ERIC Educational Resources Information Center

|Computer technologies develop at a challenging fast pace. Formal education should not only teach students basic computer skills to meet current computer needs, but also foster student development of informal learning ability for a lifelong learning process. On the other hand, students growing up in the digital world are often more skilled with…

Xiao, Lu; Carroll, John M.

2007-01-01

165

Experienced teachers' perceptions of learning and using computer technology  

Microsoft Academic Search

This study explored the perceptions and roles of experienced teachers as they learned and began using computer technology in their teaching. A 2nd grade, a 4th grade, and a 6th grade teacher, each a computer novice with several years of teaching experience, were studied for two years as they learned to use computers and made decisions about how to use

Rick Alan Snoeyink

2000-01-01

166

Technology forecasting: The case of Computational Fluid Dynamics (CFD)  

Microsoft Academic Search

Forecasting emerging technologies as well the rate of diffusion of resultant products are complex in the context of management of technology usually because of a lack of relevant data. Techniques such as bibliometric analysis and the Bass diffusion model are utilized in this paper to assess the growth rate and market penetration of Computational Fluid Dynamics (CFD) as a technology.

L. Pretorius; S. J. Benade; S. Kruger

2008-01-01

167

Molecular and Nanoscale Computing and Technology  

Microsoft Academic Search

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

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

168

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

169

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

170

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.

171

Ageing, Learning, and Computer Technology in Australia  

ERIC Educational Resources Information Center

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

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

2007-01-01

172

Ageing, Learning, and Computer Technology in Australia  

ERIC Educational Resources Information Center

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

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

2007-01-01

173

Phase-multiplication holography  

DOEpatents

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

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

1982-01-25

174

Electron Holography: phases matter.  

PubMed

Essentially, all optics is wave optics, be it with light, X-rays, neutrons or electrons. The information transfer from the object to the image can only be understood in terms of waves given by amplitude and phase. However, phases are difficult to measure: for slowly oscillating waves such as sound or low-frequency electromagnetic waves, phases can be measured directly; for high frequencies this has to be done by heterodyne detection, i.e. superposition with a reference and averaging over time. In optics, this is called interferometry. Because interference is mostly very difficult to achieve, phases have often been considered 'hidden variables' seemingly pulling the strings from backstage, only visible by their action on the image intensity. This was almost the case in conventional Electron Microscopy with the phase differences introduced by an object. However, in the face of the urgent questions from solid state physics and materials science, these phases have to be determined precisely, because they encode the most dominant object properties, such as charge distributions and electromagnetic fields. After more than six decades of very patient advancement, electron interferometry and holography offer unprecedented analytical facilities down to an atomic scale. Akira Tonomura has prominently contributed to the present state. PMID:23620338

Lichte, Hannes

2013-04-25

175

Planning Computer Lessons. Tech Use Guide: Using Computer Technology.  

ERIC Educational Resources Information Center

|This guide offers planning and organizing ideas for effectively using computers in classrooms that include students both with and without disabilities. The guide addresses: developing lesson plans, introducing the lesson in a way that builds motivation, providing guided and independent practice, extending the learning, and choosing software.…

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

176

Computer Network Interconnection: Problems and Prospects. Computer Science & Technology Series.  

ERIC Educational Resources Information Center

This report examines the current situation regarding the interconnection of computer networks, especially packet switched networks (PSNs). The emphasis is on idntifying the barriers to interconnection and on surveying approaches to a solution, rather than recommending any single course of action. Sufficient organizational and technical background…

Cotton, Ira W.

177

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.

178

Computational Fluid Dynamics Technology for Hypersonic Applications.  

National Technical Information Service (NTIS)

Several current challenges in computational fluid dynamics and aerothermodynamics for hypersonic vehicle applications are discussed. Example simulations are presented from code validation and code benchmarking efforts to illustrate capabilities and limita...

P. A. Gnoffo

2003-01-01

179

Computer Managed Learning for Technology Programs.  

ERIC Educational Resources Information Center

|Discusses computer-managed learning (CML), which uses a microcomputer to present educational material to students. CML presents content, graphics, and activities, usually in the form of questions to students to allow them to assess their own learning progress. (JOW)|

Ross, David

1990-01-01

180

Foreign Technology Alert Bibliography: Computer Software.  

National Technical Information Service (NTIS)

This document provides a systematically organised collection of abstracts from the NTIS bibliographic data base relating to computer software and describing work originating from countries outside the USA. A tailored search of the data base was performed ...

G. Wilkinson

1982-01-01

181

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

182

Computers as cognitive tools: Learning with technology, not from technology  

Microsoft Academic Search

COGNITIVE TOOLS are computer-based applications that are normally used as productivity software. However, these applications\\u000a may also function as knowledge representation formalisms that require learners to think critically when using them to represent\\u000a content being studied or what they already know about a subject. Applications such as databases, spreadsheets, semantic networks,\\u000a expert systems, multimedia\\/hypermedia construction, can function as computer-based cognitive

David H. Jonassen

1995-01-01

183

Chinese-English Automation and Computer Technology Dictionary. Volume I.  

National Technical Information Service (NTIS)

The Automation and Computer Technology Dictionary is the fifth in a series of Chinese-English technical dictionaries. The purpose of the series is to provide rapid reference tools for translators, abstractors, and research analysis concerned with scientif...

1979-01-01

184

Computer simulation of an advanced combustor for clean coal technology.  

National Technical Information Service (NTIS)

Magnetohydrodynamic (MHD) power generation is a clean coal technology because of its higher thermal efficiency and lower pollutant emission. Argonne National Laboratory used a comprehensive integral combustion computer code to aid the development of a TRW...

S. L. Chang S. A. Lottes

1992-01-01

185

Assessment of Computer Dispatch Technology in the Paratransit Industry.  

National Technical Information Service (NTIS)

The document explores how computer dispatch technology can improve the efficiency of dispatching shared-ride vehicles on a real time basis. The document investigates the current operating capabilities of such systems, their costs and economic benefits, th...

J. R. Stone G. Gilbert A. Nalevanko

1992-01-01

186

Computer-Based Training Technology: Overview and System Selection Criteria.  

National Technical Information Service (NTIS)

Selection of computer-based training (CBT) technology is dependent primarily on the intended application. CBT system applications fall into six categories: informational, drill-and-practice, tutorial, simulation, inquiry, and intelligent. The types of har...

R. L. Sinek

1986-01-01

187

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

188

Computer Technology Integration and Student Learning: Barriers and Promise  

Microsoft Academic Search

Political and institutional support has enabled many institutions of learning to spend millions of dollars to acquire educational\\u000a computing tools (Ficklen and Muscara, Am Educ 25(3):22–29, 2001) that have not been effectively integrated into the curriculum.\\u000a While access to educational technology tools has remarkably improved in most schools, there is still concern about instructional\\u000a integration of computer technology to support

Jared Keengwe; Grace Onchwari; Patrick Wachira

2008-01-01

189

Polarimetric wideband holography using microwaves  

Microsoft Academic Search

A fully polarimetric, electromagnetic inversion formulation of the inverse diffraction problem is presented. It is shown how scattering field data can be used in this formulation to determine the geometry and induced flows of the scattering object. The application of the formulation to polarimetric wideband holography using microwaves is demonstrated.

K. J. Langenberg; M. Brandfass; P. Fellinger; T. Gurke; T. Kreutter

1991-01-01

190

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

191

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

192

Rainbow holography and its applications  

NASA Astrophysics Data System (ADS)

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

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

1993-09-01

193

Image formation in digital holography  

Microsoft Academic Search

In this study we investigate the imaging mechanism of digital holography. The imaging process is separated into three steps: hologram recording, phase retrieval, and object field reconstruction. For hologram recording, the average effect due to the sensor pixel aperture and the role of the physical reference beam are addressed particularly. The average effect of pixel aperture is equivalent to a

Fucai Zhang; Giancarlo Pedrini; Wolfgang Osten

2006-01-01

194

Holography applications in recent China  

NASA Astrophysics Data System (ADS)

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

Hsu, Dahsiung

2000-10-01

195

Toward a theory of the acquisition of computer-aided technologies via computer-simulation modeling  

Microsoft Academic Search

Developments in computer-aided technologies to design, engineer, manufacture, market, and service products have created powerful incentives for companies to adopt these technologies. These pressures stem from the ability of competitors who have employed the technologies to develop and produce more timely, less costly, and higher quality products. The goal of the dissertation work is to develop a theory of the

Scogin

1986-01-01

196

Computers for artificial intelligence a technology assessment and forecast  

SciTech Connect

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

Miller, R.K.

1986-01-01

197

The Liberation of Disabled Persons in a Technological Society: Access to Computer Technology.  

ERIC Educational Resources Information Center

This article describes: the specific obstacles to complete accessibility of the disabled to computer technology; the role of adaptive devices in the use of computer technology; the development of these devices; types, descriptions, and classifications of adaptive devices; and recommendations for practice and future research. (Author/CB)

Burkhead, E. Jane; And Others

1986-01-01

198

COMPUTATIONAL FLUID DYNAMICS TECHNOLOGY FOR HYPERSONIC APPLICATIONS  

Microsoft Academic Search

Several current challenges in computational fluid dynamics and aerothermodynamics for hypersonic vehicle applications are discussed. Example simulations are presented from code validation and code benchmarking efforts to illustrate capabilities and limitations. Opportunities to advance the state-of-art in algorithms, grid generation and adaptation, and code validation are identified. Highlights of diverse efforts to address these challenges are then discussed. One such

Peter A. Gnoffo

199

Rivarly and technological complementarities in computer software  

Microsoft Academic Search

In this paper we contend that - contrary to what argued by a vast part of the literature - computer software and, more in general, digital goods (i.e. symbolic strings on an electronic medium with some economic value) do not present the characteristics of a public good as they do not suer from lack of rivarly and excludability any more

Luigi Marengo; Antonio Palestrini; Corrado Pasquali

200

Future technologies from trends in computer forensic science  

Microsoft Academic Search

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

V. Civie; R. Civie

1998-01-01

201

"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

202

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…

Lakeland Tech Prep Consortium, Kirtland, OH.

203

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

ERIC Educational Resources Information Center

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

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

204

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

205

Implications of Computer Technology for Industrial Education.  

ERIC Educational Resources Information Center

|Industrial education, because of expanding technology, must acknowledge the changing realities of the world in which it functions and for which it prepares individuals to participate. Therefore, the purpose of this study was to examine selected public schools, at the elementary, secondary, and higher educational levels, for the purpose of…

Novosad, John P.

206

Risk Governance of Pervasing Computing Technologies  

Microsoft Academic Search

Innovation in fields of risk technologies is not contingent merely on the reactions of those who are directly affected. It is also influenced by the wider public sphere. Taking into consideration the changing value structures in modern western societies, we expect that forces of the public sphere, particularly seen in the reactions of NGOs, the media and the public as

Piet Sellke

207

Exploring Computer Technology. The Illinois Plan for Industrial Education.  

ERIC Educational Resources Information Center

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

Illinois State Univ., Normal.

208

National Survey of Computer Aided Manufacturing in Industrial Technology Programs.  

ERIC Educational Resources Information Center

The current status of computer-aided manufacturing in the 4-year industrial technology programs in the United States was studied. All industrial technology department chairs were mailed a questionnaire divided into program information, equipment information, and general comments sections. The questionnaire was designed to determine the subjects…

Heidari, Farzin

209

Nurses and health information technology: working with and around computers.  

PubMed

Information technology is nearly ubiquitous in health care settings. Nurses need basic computer skills and information literacy to effectively practice nursing. In addition, nurses must be prepared not only to work around complex health information technology, but also to communicate with individuals who can address the underlying problems. PMID:22128698

Peace, Jane

210

Computed Tomography Technology: Development and Applications for Defence  

NASA Astrophysics Data System (ADS)

Computed Tomography(CT) has revolutionized the field of Non-Destructive Testing and Evaluation (NDT&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.

2008-09-01

211

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

212

Building Computer Technology Skills in TESOL Teacher Education  

ERIC Educational Resources Information Center

|This paper reports on an action research study that investigated factors influencing TESOL (teaching English to speakers of other languages) teacher candidates' (TCs) selection and use of technology in the English as a second language (ESL) classroom and the influence of explicit training in context in the use of computer technology for second…

DelliCarpini, Margo

2012-01-01

213

iControl: comparing control architectures in computing technology  

Microsoft Academic Search

This paper presents a comparison of the information control strategies inherent in two separate information technology designs: Microsoft's Next-Generation Secure Computing Base, announced in 2003, and Apple devices beginning with the corporation's first mobile device, the iPhone, released in 2008. Both technologies contain similar technical infrastructures which are by design conducive to opportunities for information control on the part of

Karen Pollock

2011-01-01

214

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

215

Combined application of cloud computation technology and Business Intelligence  

Microsoft Academic Search

In paper, in order to use the data produced in the development process of epc system network reasonably, Cloud Computing (CC) and the related technologies are presented, and the conception and architecture of Business Intelligence (BI) are introduced. Then the platform architecture of BI based on CC technology, which is also named as the platform architecture of \\

Fengyu Wang; Aimei Yan; Lifang Yang

2011-01-01

216

Supporting negotiation and dispute resolution with computing and communication technologies  

Microsoft Academic Search

Careful study of the application of computer and communications technologies to negotiation and dispute resolution can lead to a more harmonious and functional society, but also to more effective technology for software development and evaluation, and to new facilities for pursuing social science research. Work in this area has initially been spurred on by rapid growth in the number and

Leon J. Osterweil; Lori A. Clarke

2010-01-01

217

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

218

Utilizing CPTOnline to upgrade the computer and information technology curriculum  

Microsoft Academic Search

A common problem for the keepers of computer and information technology curriculums is the blending of e-commerce courses into the core curriculum. Certainly some of the core principles of technology-based programs hold up reasonably well regardless of the environment but the emergence of the Web as a development environment has created both new opportunities and new challenges for educators at

Ed Sullivan

2003-01-01

219

The impact and use of computer technology by the police  

Microsoft Academic Search

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

Kent W. Colton; W. Colton

1979-01-01

220

8K4K-size computer generated hologram for 3-D visual system using rendering technology  

Microsoft Academic Search

One of the research topics in holography is CGH (computer-generated hologram) that generates hologram by calculation. In CGH, 3-D objects were historically described by aggregate of point light sources. However, some methods are recently developed, in which 3-D objects are described by other ways in order to reconstruct more realistic or artistic 3-D objects. We introduce a study for the

Kenji Yamamoto; Takanori Senoh; Ryutaro Oi; Taiichiro Kurita

2010-01-01

221

Innovative technologies II - Multi-paradigm computing  

Microsoft Academic Search

Application accelerators such as FPGAs hold the promise of delivering significant improvements in performance for a variety of applications. However much work needs to be done to make application accelerators feasible and affordable for a wide range of supercomputing users.Linux Networx is designing its first FPGA-accelerated system designed specifically for high performance multi-paradigm computing. Linux Networx aims to help accelerate

Josh Harr

2006-01-01

222

Correlators of circular Wilson loops from holography  

NASA Astrophysics Data System (ADS)

We study the correlators of two circular Wilson loops of different radii at strong coupling. In our setup one Wilson loop is located inside the other. We use holography to calculate the connected two-point function. Both an anti-de Sitter background and a confining background are considered. As the computation for the confining case cannot be carried out analytically, we solve the problem numerically. In the anti-de Sitter case, our results agree with similar holographic calculations. In the case of a confining background, we find an asymptotic area law, in agreement with the result of the lattice strong coupling expansion. We also elaborate on the subtle issue of the interplay between connected and disconnected string world sheets.

Armoni, Adi; Piai, Maurizio; Teimouri, Ali

2013-09-01

223

Direct-to-digital holography and holovision  

DOEpatents

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

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

2000-01-01

224

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

225

Imaging live humans through smoke and flames using far-infrared digital holography.  

PubMed

The ability to see behind flames is a key challenge for the industrial field and particularly for the safety field. Development of new technologies to detect live people through smoke and flames in fire scenes is an extremely desirable goal since it can save human lives. The latest technologies, including equipment adopted by fire departments, use infrared bolometers for infrared digital cameras that allow users to see through smoke. However, such detectors are blinded by flame-emitted radiation. Here we show a completely different approach that makes use of lensless digital holography technology in the infrared range for successful imaging through smoke and flames. Notably, we demonstrate that digital holography with a cw laser allows the recording of dynamic human-size targets. In this work, easy detection of live, moving people is achieved through both smoke and flames, thus demonstrating the capability of digital holography at 10.6 ?m. PMID:23482109

Locatelli, M; Pugliese, E; Paturzo, M; Bianco, V; Finizio, A; Pelagotti, A; Poggi, P; Miccio, L; Meucci, R; Ferraro, P

2013-03-11

226

Surpassing digital holography limits by lensless object scanning holography.  

PubMed

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

Micó, Vicente; Ferreira, Carlos; García, Javier

2012-04-23

227

X-ray fluorescence holography  

NASA Astrophysics Data System (ADS)

X-ray fluorescence holography (XFH) is a method of atomic resolution holography which utilizes fluorescing atoms as a wave source or a monitor of the interference field within a crystal sample. It provides three-dimensional atomic images around a specified element and has a range of up to a few nm in real space. Because of this feature, XFH is expected to be used for medium-range local structural analysis, which cannot be performed by x-ray diffraction or x-ray absorption fine structure analysis. In this article, we explain the theory of XFH including solutions to the twin-image problem, an advanced measuring system, and data processing for the reconstruction of atomic images. Then, we briefly introduce our recent applications of this technique to the analysis of local lattice distortions in mixed crystals and nanometer-size clusters appearing in the low-temperature phase of a shape-memory alloy.

Hayashi, Kouichi; Happo, Naohisa; Hosokawa, Shinya; Hu, Wen; Matsushita, Tomohiro

2012-03-01

228

Holography with Low Energy Electrons  

NASA Astrophysics Data System (ADS)

Coherent low energy electrons of 60-200 eV kinetic energy and sub-nanometer wavelength provide a tool to record holograms of individual bio-molecules, such as DNA or viruses. From the recorded holograms, the three-dimensional shape of the molecules can numerically be reconstructed. The experimental setup as well as the numerical reconstruction of low energy electron holograms from individual bio-molecules shall be discussed. Since most biological objects are transparent for electrons they introduce only a phase shift to the incident electron wave. We present a method to not only retrieve the absorbing (as most known methods do) but also the phase properties of the object wave. Finally, we present a general solution of the long-standing twin image problem in holography. It is applicable to any type of holography independent of the wavelength used and the nature of the wave, be it light, electrons, x-rays or any other coherent radiation.

Latychevskaia, Tatiana; Stevens, Gregory; Plueckthun, Andreas; Fink, Hans-Werner

2007-03-01

229

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

ERIC Educational Resources Information Center

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

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

230

extension of minimal model holography  

NASA Astrophysics Data System (ADS)

The CFT dual of the higher spin theory with minimal spectrum is determined. Unlike previous examples of minimal model holography, there is no free parameter beyond the central charge, and the CFT can be described in terms of a non-diagonal modular invariant of the bosonic theory at the special value of the 't Hooft parameter . As evidence in favour of the duality we show that the symmetry algebras as well as the partition functions agree between the two descriptions.

Beccaria, Matteo; Candu, Constantin; Gaberdiel, Matthias R.; Groher, Michael

2013-07-01

231

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

232

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

233

Multi-wavelength heterodyne holography and interferometry  

NASA Astrophysics Data System (ADS)

A novel phase-shifting technique, Doppler phase-shifting is introduced to interferometry and holography. Its principle, features and advantages are discussed. The use of multiple wavelengths in this method is also discussed. Their applications such as shape measurement, color holography etc. are presented.

Yatagai, Toyohiko

2013-09-01

234

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

235

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

NASA Astrophysics Data System (ADS)

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

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

2012-10-01

236

How to Make Business with Computer Vision Technology  

Microsoft Academic Search

\\u000a Business development in highly competitive new markets is strongly dependent on the level of technology innovation. Actually,\\u000a the real success of a new product is affected by many other factors in the development chain, including customer requirements\\u000a understanding and system implementation. The paper is aimed to refer some direct experience of New product development based\\u000a on Computer Vision Technology. A

Giovanni B. Garibotto

2005-01-01

237

Application of Computer Technology to Drug Abuse Prevention  

Microsoft Academic Search

Since the late 1970s, when computers were first introduced into classrooms, health educators and health-promotion scientists\\u000a have attempted to harness this technology and its inherent appeal to youth for prevention purposes. Unfortunately, few of\\u000a those efforts have been sustained to the point where efficacy can be shown through summative evaluation. While advances in\\u000a the technology offer new frontiers for drug

Kris Bosworth

238

The microwave holography system for the Sardinia Radio Telescope  

NASA Astrophysics Data System (ADS)

Microwave holography is a well-established technique for mapping surface errors of large reflector antennas, particularly those designed to operate at high frequencies. We present here a holography system based on the interferometric method for mapping the primary reflector surface of the Sardinia Radio Telescope (SRT). SRT is a new 64-m-diameter antenna located in Sardinia, Italy, equipped with an active surface and designed to operate up to 115 GHz. The system consists mainly of two radio frequency low-noise coherent channels, designed to receive Ku-band digital TV signals from geostationary satellites. Two commercial prime focus low-noise block converters are installed on the radio telescope under test and on a small reference antenna, respectively. Then the signals are amplified, filtered and downconverted to baseband. An innovative digital back-end based on FPGA technology has been implemented to digitize two 5 MHz-band signals and calculate their cross-correlation in real-time. This is carried out by using a 16-bit resolution ADCs and a FPGA reaching very large amplitude dynamic range and reducing post-processing time. The final holography data analysis is performed by CLIC data reduction software developed within the Institut de Radioastronomie Millimétrique (IRAM, Grenoble, France). The system was successfully tested during several holography measurement campaigns, recently performed at the Medicina 32-m radio telescope. Two 65-by-65 maps, using an on-the-fly raster scan with on-source phase calibration, were performed pointing the radio telescope at 38 degrees elevation towards EUTELSAT 7A satellite. The high SNR (greater than 60 dB) and the good phase stability led to get an accuracy on the surface error maps better than 150 ?m RMS.

Serra, G.; Bolli, P.; Busonera, G.; Pisanu, T.; Poppi, S.; Gaudiomonte, F.; Zacchiroli, G.; Roda, J.; Morsiani, M.; López-Pérez, J. A.

2012-09-01

239

Implications of Computer Technology. Harvard University Program on Technology and Society.  

ERIC Educational Resources Information Center

|Lengthy abstracts of a small number of selected books and articles on the implications of computer technology are presented, preceded by a brief state-of-the-art survey which traces the impact of computers on the structure of economic and political organizations and socio-cultural patterns. A summary statement introduces each of the three…

Taviss, Irene; Burbank, Judith

240

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

Microsoft Academic Search

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

Albert A. ANGEHRN; Thierry NABETH

241

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

242

DYI digital holography  

NASA Astrophysics Data System (ADS)

We have created a programming tool which uses image data provided by webcam connected to personal computer and gives user an ability to see the future digital hologram preview on his computer screen, before sending video data to holographic printing companies. In order to print digital hologram, one needs to have a sequence of images of the same scene taken from different angles and nowadays web cameras - stand-alone or incorporated into mobile computer, can be an acceptable source of such image sequences. In this article we are describing this DIY holographic imaging process in details.

Zacharovas, Stanislovas; Nikolskij, Andrej; Kuchin, Jevgenij

2011-02-01

243

Jalapeno: secentralized grid computing using peer-to-peer technology  

Microsoft Academic Search

This paper presents the Jalapeno grid computing system. Jalapeno is implemented in Java and uses peer-to-peer technology provided by Project JXTA. The Jalapeno system consists of manager, worker and task submitter hosts. The task submitter submits a collection of tasks, a task bundle, to be processed by the system to a randomly chosen manager. The manager splits the bundle into

Niklas Therning; Lars Bengtsson

2005-01-01

244

Computer technology students - what skills do they really need?  

Microsoft Academic Search

As part of a continuing desire to improve the employability of computer technology students, we are focussing on the knowledge and skills that graduates need in the workforce. In order to do this we solicited the opinion of working graduates with regard to the usefulness of technical and non-technical knowledge in the workplace and to the skills that they learnt

Elizabeth Haywood; Jane Madden

2000-01-01

245

Optimizing alcohol production from whey using computer technology. [Kluyveromyces fragilis  

Microsoft Academic Search

This study was undertaken with the major goal of optimizing the ethanol production from whey using computer technology. To reach this goal, a mathematical model that would describe the fermentation and that could be used for the optimization was developed. Kluyveromyces fragilis was the microorganism used to ferment the lactose in the whey into ethanol. Preliminary studies showed that K.

L. Zertuche; R. R. Zall

1985-01-01

246

Manipulating Technology: Discourse Analysis on American Computer Advertisements  

Microsoft Academic Search

Through the discourse analysis on a selection of advertisements from popular Australian computer magazines, the questions about how commercial interests manipulate technology and how it is achieved through the exploitation of people' s desire for power, freedom and self-expression are viewed.

Hongjin He

247

The Voice as Computer Interface: A Look at Tomorrow's Technologies.  

ERIC Educational Resources Information Center

Discussion of voice as the communications device for computer-human interaction focuses on voice recognition systems for use within a library environment. Voice technologies are described, including voice response and voice recognition; examples of voice systems in use in libraries are examined; and further possibilities, including use with…

Lange, Holley R.

1991-01-01

248

A Research Program in the Field of Computer Technology.  

National Technical Information Service (NTIS)

This report summarizes the research performed by USC/Information Sciences Institute from 17 May 1973 to 16 May 1974. The research is aimed at applying computer science and technology to problem areas of high DoD/military impact. The ISI program consists o...

K. W. Uncapher

1974-01-01

249

An effective structure for Technology Computer-Aided Design organization  

Microsoft Academic Search

Summary form only given. This paper describes the merits and demerits of presently organized Technology Computer-Aided Design (TCAD) Structures and proposes an effective structure of TCAD organization for the continued success of today's semiconductor design and manufacturing companies. This study shows that the different TCAD functions are either distributed among the primary groups in the value chain of the firm

S. K. Saha

1997-01-01

250

Russian-English Dictionary of Cybernetics and Computer Technology.  

National Technical Information Service (NTIS)

The second edition of the Rand Russian-English Dictionary of Cybernetics and Computer Technology contains over 300 new major entries, making a total of 2050 major entries and about 3300 subentries; each subentry defines a key term as it appears in frequen...

W. B. Holland

1969-01-01

251

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

252

Overview of European technology in computers, telecommunications, and electronics  

NASA Astrophysics Data System (ADS)

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

Blackburn, J. F.

1990-05-01

253

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

254

Computer Science and Technology: Impact of Charge-Transfer Device Technology on Computer Systems.  

National Technical Information Service (NTIS)

The document assesses the status of charge-transfer device technology as displayed by foreign research and manufacturing facilities for a period up to September 1975. Capabilities and accomplishments of charge-transfer device research facilities in Japan,...

R. B. J. Warnar

1977-01-01

255

Aesthetics and representation in holography  

NASA Astrophysics Data System (ADS)

Every medium has a code, a set of rules or conventions according to which determined elements are organized into a signifying system. The English language is a code as is perspective in painting and photography. In the first case, the elements are phonemes organized into words and sentences according to a social convention: the syntax of English. In the second case, the elements are dots and lines organized into pictures according to a geometric method. An artist or movement can break the conventions of the medium, as has done Cezanne with painting, Moholy-Nagy with photography and cummings with the English idiom in poetry, and create new elements and rules for combining them. If this is done, the level of predictability (or conventionality) is lowered and unpredictability is increased -- becoming more difficult for the immediate audience to understand it. But once these new rules are learned and the ideas behind them widely understood, the level of unpredictability is lowered and they become new conventions that can be accepted by the audience. Holographic artists exploring the medium -- as opposed to advertisers using holography, who favor a high level of predictability -- are breaking several visual and cultural conventions. As a matter of fact, holography is so new that many questions are left open about the nature of the medium. Therefore, any attempt to clarify the issues raised by holography on a cultural level has a prospective (and not conclusive) tone, concentrating more thoroughly on general points and on the promise of its potentialities than on the records of its historical achievements so far.

Kac, Eduardo

1995-02-01

256

Computational structures technology and UVA Center for CST  

NASA Astrophysics Data System (ADS)

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.

1992-05-01

257

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

258

D3-brane holography  

Microsoft Academic Search

It has recently been conjectured that the AdS5\\/SYM4 correspondence can be generalized away from the conformal limit, to a duality between supergravity on the full asymptotically flat three-brane background and a theory characterized as Script N = 4 SYM deformed in the IR by a specific dimension-eight operator. Assuming that this relation is valid, we derive a prescription for computing

Ulf H. Danielsson; Martín Kruczenski; Alberto Güijosa; Bo Sundborg

2000-01-01

259

Teaching Computer Technology to Adult Computer Novices. Normative Didactics Based on Adults’ Perception of Information Technology  

Microsoft Academic Search

On the basis of a previous investigation of the global understandings found among adult computer novices, this article deals with two problems: (i) how can the results of a qualitative investigation be formulated so as to make them practically available for teachers? and (ii) how can the gap be bridged between the results of the descriptive investigation and the implied

Sven Erik Nordenbo

1990-01-01

260

Touch Computing: Simplifying Human to Environment Interaction through NFC Technology  

Microsoft Academic Search

This work analyses the use of NFC technology to simplify the interactions of users with context- aware services offered by intelligent environments. Touch Computing is a novel explicit user interaction mechanism in which users accompanied by their NFC-enabled mobile devices request services from the environment by touching tags or other NFC-enabled devices. This paper describes the deployment of three NFC-aware

Diego López-de-Ipiña; Juan Ignacio Vazquez; Iker Jamardo

261

The use of computer aids in IC technology evolution  

Microsoft Academic Search

Computer-aided analysis of integrated circuit devices has played a critical role for more than three decades of technology evolution. In the 1950s and early 1960s simulation was used extensively to characterize the operating principles of both bipolar and MOS devices. Bipolar effects such as base-width modulation and base pushout were characterized as well as MOS phenomena including gradual channel and

R. W. Dutton; M. R. Pinto

1986-01-01

262

Depth resolution enhancement in double-detection optical scanning holography.  

PubMed

We propose an optical scanning holography system with enhanced axial resolution using two detections at different depths. By scanning the object twice, we can obtain two different sets of Fresnel zone plates to sample the same object, which in turn provides more information for the sectional image reconstruction process. We develop the computation algorithm that makes use of such information, solving a constrained optimization problem using the conjugate gradient method. Simulation results show that this method can achieve a depth resolution up to 1 ?m. PMID:23669777

Ou, Haiyan; Poon, Ting-Chung; Wong, Kenneth K Y; Lam, Edmund Y

2013-05-01

263

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

264

Accurate estimation of phase-shifting error in digital holography  

NASA Astrophysics Data System (ADS)

Phase shifting error is a major error source in phase-shifting digital holography. It affects the quality of the reconstructed object and causes errors in its phase and amplitude calculation. This paper presents a simple method to accurately retrieve the actual phase-shifting value used in practical hologram recording. It therefore provides the possibility of completely eliminating the phase-shifting error in digital hologram. The proposed method is based on solving the object wave reconstruction equation. The effectiveness of the proposed method is verified by both mathematical analysis and computer simulation.

Zhang, Shuqun

2004-08-01

265

Recording conditions of digital holography  

NASA Astrophysics Data System (ADS)

Based on Fresnel diffraction formula, the spatial frequency distribution of the holograms recorded with plane and spherical reference wave are analyzed. Using the sampling theorem and the condition of spectrum separation, the general recording conditions of the digital hologram are deduced. The minimum recording distances and the offsets of the reference wave for some practical recording configurations are given. The deduced recording conditions about off-axis Fresnel hologram are different from others, which are different each other. The separating condition of the frequency spectrum for Fourier transform holography is applied directly in their derivation. Moreover, they have applied different other approximations in their derivation. No approximation is applied to our deduction. Therefore, the results derived from our proposed method are accurate. The recording conditions of digital holography with general spherical reference wave are presented firstly on our knowledge. The recording conditions of in-line and off-axis lensless Fourier can be gotten directly as special case. The simulations and the experiments demonstrate that the method and the results are valid. The results also show that only the sampling and separation conditions are met simultaneously, the reconstructed image with high quality can be obtained.

Wang, Huaying; Wang, Dayong; Xie, Jianjun; Tao, Shiquan

2007-01-01

266

Resolution factors in edgeline holography.  

PubMed

When an in-line Fresnel hologram of an object such as a projectile in flight is made, the reconstruction comprises an image of the outside edge of the object superimposed upon a Fresnel diffraction pattern of the edge and an unmodulated portion of the reconstruction beam. When the reconstructed image is bandpass filtered, the only remaining significant contribution is that of a diffraction pattern which is symmetrical about an edgeline gaussian image of the object. The present paper discusses the application of this type of holography in accurately locating the edge of a large dynamic object, the position of which is not accurately known in any dimension. A theoretical and experimental analysis was performed to study the effects of motion, hologram size, film type, and practical limitations upon the attainable resolution in the reconstructed image. The bandlimiting effect of motion is used to relate the motion effected resolution limit of holography to that of photography. The study shows that an edgeline can be accurately located even at high velocity normal to the edge. PMID:20111113

Trolinger, J D; Gee, T H

1971-06-01

267

Image formation in digital holography  

NASA Astrophysics Data System (ADS)

In this study we investigate the imaging mechanism of digital holography. The imaging process is separated into three steps: hologram recording, phase retrieval, and object field reconstruction. For hologram recording, the average effect due to the sensor pixel aperture and the role of the physical reference beam are addressed particularly. The average effect of pixel aperture is equivalent to a low pass filter, which acts on the interference term between the object field and the reference wavefront. An optimal physical reference beam is then to minimize the bandwidth of the interference term so that more object information can pass through the filter. For the reconstruction of object field, emphasis is paid on the correspondence between the underlying physical process and the discrete system represented by the reconstruction algorithms. The implication of sampling theory on each reconstruction algorithm is discussed in detail. The sampling requirement imposes a limitation only on the maximum extension of object field. Our analysis indicates that the achievable spatial resolution by digital holography is determined by the recording numerical aperture and wavelength of light, the same as the conventional microscopy. The independent analysis of each part illumines the way to optimize the system performance.

Zhang, Fucai; Pedrini, Giancarlo; Osten, Wolfgang

2006-05-01

268

The post-primary computing experiences of institute of technology computing students  

Microsoft Academic Search

This is the first report on the findings of a survey carried out on 578 students entering computing courses at seven institutes of technology in Ireland in 2001. The progress of this cohort of students is charted through the four years of their course using questionnaires and interviews. It is envisioned that the study will highlight the different relationships and

Carol O Shea; Seamus O Shea; Maureen Killeavy

2006-01-01

269

Acoustic Holography. A Bibliography With Abstracts.  

National Technical Information Service (NTIS)

The bibliography contains 64 selected abstracts of research reports retrieved using the NTIS on-line search system--NTISearch. The topics covered include techniques of acoustic holography including microwave, seismic wave, and ultrasonic imaging and their...

D. M. Craig

1974-01-01

270

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

271

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

272

Local reference beam generation in holography  

Microsoft Academic Search

A new method of constructing laser holograms is discussed wherein the only light used is that received directly from the object. Reconstruction is accomplished in the usual way. Long-distance holography is an immediate application.

H. J. Caulfield; J. L. Harris; J. G. Cobb

1967-01-01

273

Campus Computing, 1998. The Ninth National Survey of Desktop Computing and Information Technology in American Higher Education.  

ERIC Educational Resources Information Center

This report presents findings of a June 1998 survey of computing officials at 1,623 two- and four-year U.S. colleges and universities concerning the use of computer technology. The survey found that computing and information technology (IT) are now core components of the campus environment and classroom experience. However, key aspects of IT…

Green, Kenneth C.

274

Campus Computing, 1998. The Ninth National Survey of Desktop Computing and Information Technology in American Higher Education.  

ERIC Educational Resources Information Center

|This report presents findings of a June 1998 survey of computing officials at 1,623 two- and four-year U.S. colleges and universities concerning the use of computer technology. The survey found that computing and information technology (IT) are now core components of the campus environment and classroom experience. However, key aspects of IT…

Green, Kenneth C.

275

Real-world applications for brain-computer interface technology.  

PubMed

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. Our research explores some of the problems and challenges of combining BCI outputs with human-computer interface paradigms in order to achieve optimal interaction. We utilize a variety of application domains to compare and validate BCI interactions, including communication, environmental control, neural prosthetics, and creative expression. The goal of this research is to improve quality of life for those with severe disabilities. PMID:12899263

Moore, Melody M

2003-06-01

276

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

277

Reconfigurable Array Interconnection by Photorefractive Volume Holography  

NASA Astrophysics Data System (ADS)

Parallel computing algorithms can be effectively implemented by combining local electronic processing with global optical interconnection. This dissertation describes the development of an optical array interconnection network based on photorefractive volume holography. The approach taken uses the correlation matrix-tensor multiplier (CMTM) algorithm, which optically convolves the phase-encoded input array with a control image holding the interconnection weights. Two-dimensional arrays can be interconnected with complex grey-level weights using binary phase-only spatial light modulators. The CMTM algorithm allows graceful accomodation of limited modulator size by trading off control image bandwidth for output signal to noise ratio. The optical correlation was performed by photorefractive four-wave mixing, storing the interconnection information in a single exposure of the control image. Multiple interconection patterns were prestored as color-multiplexed volume reflection holograms in z-cut LiNbO_3. Fast reconfiguration between interconnection patterns is possible using a wavelength tunable source, decoupling both the modulation and switching speeds from the slow photorefractive response. Experimental results confirmed theoretical predictions that the algorithm works best for densely connected networks, with a large fan-in to each output. Interconnection of up to 4096 inputs and outputs was demonstrated using such dense interconnection patterns. An aggregate average SNR of over 200 was obtained for 1024 inputs and outputs. Finally, a compact packaged optoelectonic processor system using CMTM interconnection is proposed, and its scaling behavior investigated.

Ford, Joseph Earl

278

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

279

Computer program for distance learning of pesticide application technology.  

PubMed

Distance learning presents great potential for mitigating field problems on pesticide application technology. Thus, due to the lack of teaching material about pesticide spraying technology in the Portuguese language and the increasing availability of distance learning, this study developed and evaluated a computer program for distance learning about the theory of pesticide spraying technology using the tools of information technology. The modules comprising the course, named Pulverizar, were: (1) Basic concepts, (2) Factors that affect application, (3) Equipments, (4) Spraying nozzles, (5) Sprayer calibration, (6) Aerial application, (7) Chemigation, (8) Physical-chemical properties, (9) Formulations, (10) Adjuvants, (11) Water quality, and (12) Adequate use of pesticides. The program was made available to the public on July 1(st), 2008, hosted at the web site www.pulverizar.iciag.ufu.br, and was simple, robust and practical on the complementation of traditional teaching for the education of professionals in Agricultural Sciences. Mastering pesticide spraying technology by people involved in agricultural production can be facilitated by the program Pulverizar, which was well accepted in its initial evaluation. PMID:22159349

Maia, Bruno; Cunha, Joao P A R

2011-10-07

280

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

281

Unruh effect and holography  

NASA Astrophysics Data System (ADS)

We study the Unruh effect on the dynamics of quarks and mesons in the context of AdS5/CFT4 correspondence. We adopt an AdS5 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.

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

2011-03-01

282

Development of superconductor electronics technology for high-end computing  

NASA Astrophysics Data System (ADS)

This paper describes our programme to develop and demonstrate ultra-high performance single flux quantum (SFQ) VLSI technology that will enable superconducting digital processors for petaFLOPS-scale computing. In the hybrid technology, multi-threaded architecture, the computational engine to power a petaFLOPS machine at affordable power will consist of 4096 SFQ multi-chip processors, with 50 to 100 GHz clock frequency and associated cryogenic RAM. We present the superconducting technology requirements, progress to date and our plan to meet these requirements. We improved SFQ Nb VLSI by two generations, to a 8 kA cm-2, 1.25 µm junction process, incorporated new CAD tools into our methodology, demonstrated methods for recycling the bias current and data communication at speeds up to 60 Gb s-1, both on and between chips through passive transmission lines. FLUX-1 is the most ambitious project implemented in SFQ technology to date, a prototype general-purpose 8 bit microprocessor chip. We are testing the FLUX-1 chip (5K gates, 20 GHz clock) and designing a 32 bit floating-point SFQ multiplier with vector-register memory. We report correct operation of the complete stripline-connected gate library with large bias margins, as well as several larger functional units used in FLUX-1. The next stage will be an SFQ multi-processor machine. Important challenges include further reducing chip supply current and on-chip power dissipation, developing at least 64 kbit, sub-nanosecond cryogenic RAM chips, developing thermally and electrically efficient high data rate cryogenic-to-ambient input/output technology and improving Nb VLSI to increase gate density.

Silver, A.; Kleinsasser, A.; Kerber, G.; Herr, Q.; Dorojevets, M.; Bunyk, P.; Abelson, L.

2003-12-01

283

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

284

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

285

Visualizing Breath using Digital Holography  

NASA Astrophysics Data System (ADS)

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

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

2013-02-01

286

Photoelectron holography of platinum (111)  

SciTech Connect

Platinum atoms near a (111) single-crystal face have been imaged using photoelectron holography. Electron angular intensity patterns were collected at equally spaced wavenumbers from 6 to 12{Angstrom}{sup {minus}1}. Images of atoms near expected atomic positions are obtained from single-wavenumber analyses over the range of the data set. Positions are detected further from the emitter than we have seen previously, and symmetry assumptions are not required. We have also adopted a three dimensional means of representing the data in order to help understand the results. Twin image suppression and artifact reduction in the holographically reconstructed data are set are obtained when images at different wavenumbers are correctly phase-summed. We are assessing the capability of the technique for rendering true three-dimensional structural information for unknown systems.

Petersen, B.L. [Lawrence Berkeley Lab., CA (United States); Terminello, L.J. [Lawrence Livermore National Lab., CA (United States); Barton, J.J. [International Business Machines Corp., Yorktown Heights, NY (United States). Thomas J. Watson Research Center; Shirley, D.A. [Pennsylvania State Univ., University Park, PA (United States)

1993-04-01

287

Reconfigurable high-speed optoelectronic interconnect technology for multiprocessor computers  

NASA Astrophysics Data System (ADS)

We describe a compact optoelectronic switching technology for interconnecting multiple computer processors and shared memory modules together through dynamically reconfigurable optical paths to provide simultaneous, high speed communication amongst different nodes. Each switch provides a optical link to other nodes as well as electrical access to an individual processor, and it can perform optical and optoelectronic switching to covert digital data between various electrical and optical input/output formats. This multifunctional switching technology is based on the monolithic integration of arrays of vertical-cavity surface-emitting lasers with photodetectors and heterojunction bipolar transistors. The various digital switching and routing functions, as well as optically cascaded multistage operation, have been experimentally demonstrated.

Cheng, Julian

1995-06-01

288

Brain-computer interface technologies: from signal to action.  

PubMed

Abstract Here, we present a state-of-the-art review of the research performed on the brain-computer interface (BCI) technologies with a focus on signal processing approaches. BCI can be divided into three main components: signal acquisition, signal processing, and effector device. The signal acquisition component is generally divided into two categories: noninvasive and invasive. For noninvasive, this review focuses on electroencephalogram. For the invasive, the review includes electrocorticography, local field potentials, multiple-unit activity, and single-unit action potentials. Signal processing techniques reviewed are divided into time-frequency methods such as Fourier transform, autoregressive models, wavelets, and Kalman filter and spatiotemporal techniques such as Laplacian filter and common spatial patterns. Additionally, various signal feature classification algorithms are discussed such as linear discriminant analysis, support vector machines, artificial neural networks, and Bayesian classifiers. The article ends with a discussion of challenges facing BCI and concluding remarks on the future of the technology. PMID:24077619

Ortiz-Rosario, Alexis; Adeli, Hojjat

2013-01-01

289

High performance battery and its computer simulation technology  

NASA Astrophysics Data System (ADS)

The current status of advanced high-performance batteries and their simulation technology is reviewed in a systematic manner. In particular, attention is given to the energy, power density, efficiency, life, and capacity requirements; battery evaluations; and computer simulation studies. Results of evaluation studies are reported for some typical batteries, and it is suggested that the lithium secondary battery is particularly promising for high-density power systems. Results of simulations are presented for different types of batteries, including lead-acid, sodium-sulfur, lithium-iron sulfate, lithium, and zinc-bromine cells. Various battery applications are discussed, including electric vehicle propulsion.

Takano, Kiyonami; Kanari, Katsuhiko; Nozaki, Ken; Masuda, Toshihisa; Onda, Kazuo; Kamimoto, Masayuki

1991-08-01

290

Determination of a flow velocity field using four-exposure laser holography  

NASA Astrophysics Data System (ADS)

The application of four pulse laser holography to flow measurement is explored. The four particle images allow an estimation of velocity, acceleration, and rotational fields. Polystyrene particles, 40 to 50 microns diameter, were used. Deviations of 12 percent between observation and computation are explained. The method is useful at low velocities and high velocity gradients. It is not possible to solve the motion equation, based on Stokes drag, to compute the fluid velocity from the experimental particle velocity and acceleration data.

Rodriguez, O.; Laden, T.; Dadi, M.

1985-07-01

291

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

292

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

293

Campus Computing, 1996. The Seventh National Survey of Desktop Computing and Information Technology in American Higher Education.  

ERIC Educational Resources Information Center

|This report presents the findings of a June, 1996, survey of computing officials at 660 two- and four-year colleges and universities across the United States concerning the use of computer technology on college campuses. The survey found that instructional integration and user support emerged as the two most important information technology (IT)…

Green, Kenneth C.

294

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

295

Technical Education Transfer: Perceptions of Employee Computer Technology Self-Efficacy.  

ERIC Educational Resources Information Center

|This study investigated influences on employee self-efficacy of computer technologies resulting from computer-training programs that were intended to meet individual and organization objectives for university personnel. Influences on the transfer of training process included previous computer training, computer-use requirements, computer-use…

Decker, C. A.

1999-01-01

296

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

ERIC Educational Resources Information Center

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

Mergendoller, John R.; And Others

297

An easy teaching tool for holography  

NASA Astrophysics Data System (ADS)

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

Voslion, T.; Escarguel, A.

2012-11-01

298

Holography in the curriculum of medical institutes  

NASA Astrophysics Data System (ADS)

Holography at present is the most effective technique of obtaining 3-D images of different objects. That's why there is more and more dissemination of holography in different fields of science and engineering, for example, in medicine. So, last time the technique of synthesized holograms obtained for evaluating inner organs states of patients without surgical intervention was designed. Due to properties of the hologram such as high quality of image and relative simplicity of duplication it is clear that holography could take its place in the curriculum of medical specializations because posters, photos, and models cannot give a full notation about an object of interest. The attempt to obtain holographical complete sets to demonstrate the most frequent pathologic changes of a human's bones was undertaken by our Institutes. The aim of our research was to obtain holograms with the following properties: minimum cost and high quality of reconstructed image to identify both the presented objects and the pathologic changes of them.

Gorelik, S. Y.; Nagibina, I. M.; Baranov, S. V.; Bolshakov, O. P.; Petrishin, V. L.

1995-11-01

299

The Application of Holography as a Real-Time Three-Dimensional Motion Picture Camera.  

National Technical Information Service (NTIS)

A historical introduction to holography is presented, as well as a basic description of sideband holography for stationary objects. A brief theoretical development of both time-dependent and time-independent holography is also provided, along with an anal...

R. L. Kurtz

1973-01-01

300

Intellectual property licensing issues in the holography business  

NASA Astrophysics Data System (ADS)

Increasingly, many high-tech companies are acquiring or transferring "leases" to the innovations used to make products. In legal parlance, these innovations-which may include new manufacturing methods, applications, devices or improvements-are considered "intellectual property" (IP), and the "leases" are referred to as "licenses." The holography business, like many other high-tech businesses, has evolved over many decades and consists of many densely packed IP subspaces. However, the IP space is constantly expanding through the development of new innovations and applications, such as security and storage applications, and new materials. Additionally, like most IP, the quality and business value of holographic IP ranges widely, which makes for a challenging IP licensing environment. This paper addresses IP licensing issues in the holography business, including some basics about the forms of IP and the basic types of IP licenses, the role of an IP space analysis in licensing activities, best-practice management of licensing activities, and how IP is properly scrutinized to assess licensing potential. The concept of the patent pool is discussed in connection with security holograms as well as other technologies.

Gortych, Joseph E.

2006-03-01

301

Multiple-cavity lasers for holography  

SciTech Connect

The use of multiple-cavity lasers in holography and photography is described. By splitting up a ruby laser cavity and using part of the crystal for different cavities, a number of interesting possibilities result. Eight basically different configurations are discussed to show how the normally oversized crystal in commercially available lasers can be used to advantage. These result in lasers that become ideal sources for some applications, such as ultrahigh repetition rate, stereo holography, multiple reference wave, simultaneous front and back lighting, multiple framing, and other techniques.

Trolinger, J.D.

1984-01-01

302

Reviews of computing technology: A review of compound document architectures  

SciTech Connect

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

Hudson, B.J.

1991-10-01

303

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

304

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

Microsoft Academic Search

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

Nesrin ISIKOGLU

2003-01-01

305

Even spin minimal model holography  

NASA Astrophysics Data System (ADS)

The even spin mathcal{W}_{infty}^e algebra that is generated by the stress energy tensor together with one Virasoro primary field for every even spin s ? 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 mathcal{W}_{infty}^e can be thought of as the quantisation of the asymptotic symmetry algebra of the even higher spin theory on AdS3. On the other hand, mathcal{W}_{infty}^e is also quantum equivalent to the mathfrak{s}mathfrak{o}(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.

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

2013-01-01

306

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

ERIC Educational Resources Information Center

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

Warnick, Bryan R.

2004-01-01

307

Photorefractive Volume Holography in Artificial Neural Networks  

NASA Astrophysics Data System (ADS)

This thesis describes the use of volume holography to implement large-scale linear transformations on distributed optical fields. Such transformations are useful in the construction of hardware for artificial neural networks. The reconstruction of multiple grating holograms in layers of thin transparencies and in continuous volume media is considered and conditions under which such holograms may be used for linear transformations are derived. The control of the nature of the transformation implemented using fractal sampling grids is reviewed and the impact of such sampling grids on the energy efficiency of the overall system is considered. Information storage in volume holograms is shown to require multiple exposures and the impact of multiple exposures on linear hologram formations in saturable media and photorefractive materials is considered. It is shown for both types of media that the overall diffraction efficiency of a recorded hologram must decrease with the square of the rank of the transformation implemented. A theory for hologram formation in photorefractive materials with multiple trapping species is developed and compared with experimental results. The impact of multiple species and fixing mechanisms on linear hologram formation is evaluated. A method for refreshing the diffraction efficiency of photorefractive holograms in adaptive systems is described and demonstrated. The construction of thick holograms for linear transformations in waveguides is considered. A novel method for controlling such holograms is described and demonstrated. Learning in holographic neural networks is considered and two experimental holographic neural systems are described. The relative strengths of optical and electronic technologies for implementations of neural interconnections are considered.

Brady, David Jones

308

Use of personal computing technology by deaf-blind individuals.  

PubMed

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 possible for them to use the keyboard and screen in the same way as do seeing persons. A side benefit is that it provides a means for deaf-blind people to communicate with the sighted through a common medium. The sighted person can see the screen while the deaf-blind person feels it. Hardware cost to equip a standard personal computer with this interface is negligible. Vibrotactile Morse code is particularly viable because it can be adapted for the individual's particular tactile sensitivities. Morse-encoded tactile communication fits well in a social facilitation context for learning. It is technologically simple and standard. This work can significantly improve the quality of life for deaf-blind individuals because it provides new opportunities for communication and vocation. PMID:6239896

Zuckerman, D

1984-10-01

309

Promoting Physical Activity through Hand-Held Computer Technology  

PubMed Central

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

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

2009-01-01

310

The Impact of Computer Technology on Schools in Chile.  

ERIC Educational Resources Information Center

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

Oteiza, Fidel L.

1993-01-01

311

Design of Harmonious Human-Computer Interaction Based on Intelligence Technology Development  

Microsoft Academic Search

With the development of information technology and high technology innovation, human-computer interaction design is also constantly updated. The rapid development of Intelligence technology shows that the direction of human-computer interaction design is natural interaction that man and machine in great harmony. User-centered design of human-computer interaction will be the ultimate goal. It will effectively help users to complete tasks and

Zhou Lili; Wei Yanli

2010-01-01

312

Speckle Holography for High-Contrast Imaging  

Microsoft Academic Search

Speckle holography is an observational technique which relies on the presence of a PSF calibration star in the same field as the target of interest to produce images of diffraction-limited resolution and high dynamic range. The observations are simple and efficient, and do not require any specialized hardware beyond an imager capable of being read out fast enough to``freeze\\

C. D. Koresko

2001-01-01

313

Applications of holography to condensed matter physics  

Microsoft Academic Search

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

Simon F Ross

2012-01-01

314

Holography in a Spatially Inhomogeneous Medium.  

National Technical Information Service (NTIS)

A Huygens-Fresnel principle, extended to a medium which exhibits a spatial variation in the index of refraction, is used to calculate the resulting fringe patterns in the Fresnel-Fraunhofer and point reference Fourier-Transform methods of holography. In p...

H. T. Yura

1970-01-01

315

Ethereal presences in holography and photography  

Microsoft Academic Search

This paper examines the concept of the 'Presence of Absence' in post-mortem photography and holography, drawing upon both historical and lesser-known images as reference. To create a photographic negative one needs the presence of light to expose the light sensitive surface, be it glass, a polished plate or plastic. A hologram may also be created when a coherent light source,

M. Richardson; Kay Byrne

2007-01-01

316

Holography of incoherently illuminated 3D scenes  

Microsoft Academic Search

We review several methods of generating holograms of 3D realistic objects illuminated by incoherent white light. Using these methods, it is possible to obtain holograms with a simple digital camera, operating in regular light conditions. Thus, most disadvantages characterizing conventional holography, namely the need for a powerful, highly coherent laser and meticulous stability of the optical system are avoided. These

Natan T. Shaked; Joseph Rosen

2008-01-01

317

Realization of fuzzy algebra by Fourier holography  

NASA Astrophysics Data System (ADS)

Hologram as a fuzzy relation of two subsets is treated. Fuzzy number as a Fourier-transform of the distribution in the plane of hologram is determined. To generate monoid of fuzzy numbers, convolution as an inner composition law is used. Realization of extended ariphmetic operations by holography is discussed.

Pavlov, Alexander V.

1998-04-01

318

Living laboratories: the future computing environments group at the Georgia Institute of Technology  

Microsoft Academic Search

The Future Computing Environments (FCE) Group at Georgia Tech is a collection of faculty and students that share a desire to understand the partnership between humans and technology that arises as computation and sensing become ubiquitous. With expertise covering the breadth of Computer Science, but focusing on HCI, Computational Perception, and Machine Learning, the individual research agendas of the FCE

Gregory D. Abowd; Christopher G. Atkeson; Aaron F. Bobick; Irfan A. Essa; Blair MacIntyre; Elizabeth D. Mynatt; Thad E. Starner

2000-01-01

319

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

ERIC Educational Resources Information Center

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

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

2004-01-01

320

Focus detection criterion for refocusing in multi-wavelength digital holography  

NASA Astrophysics Data System (ADS)

The majority of focus detection criteria reported is based on amplitude contrast. Due to phase wrapping, phase contrast was previously reported unsuitable for focus finding tasks. By taking the advantage of multi-wavelength digital holography, we propose a new focus detection criterion based on phase contrast. Experimental results are presented to prove the feasibility of the developed criterion. Possible applications of the developed technology include inspecting machined surfaces in the auto industry.

Xu, Li; Mater, Mike; Ni, Jun

2011-08-01

321

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

322

Local Government, Information Systems, and Technology Transfer. Evaluating Some Common Assertions About Transfer of Computer Applications.  

National Technical Information Service (NTIS)

The transfer of computer applications among and into city and county governments is examined through comparison of the benefits claimed for technology transfer with the actual experiences of local governments. Seven common assertions about technology tran...

K. L. Kraemer

1976-01-01

323

EFFECTS OF COMPUTATIONAL TECHNOLOGY ON COMPOSITE MATERIALS RESEARCH: THE CASE OF DISSIPATED ENERGY DENSITY  

Microsoft Academic Search

1. SUMMARY In most fields of applied science and technology, advances in computational technology have changed the ways of research as well as the roles of research- ers. NRL's Mechanics of Materials Branch has adopted a paradigm of \\

P. R. FACTORY

324

National Institute of Standards and Technology, Computer Security Division, Annual Report, FY 2009.  

National Technical Information Service (NTIS)

The Computer Security Division (CSD), a component of NIST's Information Technology Laboratory (ITL), provides standards and technology to protect information systems against threats to the confidentiality, integrity, and availability of information and se...

P. O'Reilly

2010-01-01

325

Computer vision challenges and technologies for agile manufacturing  

NASA Astrophysics Data System (ADS)

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

Molley, Perry A.

1996-02-01

326

Trust in computer technology and the implications for design and evaluation  

Microsoft Academic Search

Computer technology is pervasive and often problematic, and the sociological construct of trust has emerged as an important intervening variable to describe reliance on technology. Trust is an important mechanism for coping with the cognitive complexity that accompanies increasingly sophisticated technology. Because of this, understanding trust can help explain reliance on technology and human performance in complex systems. This review

John D. Lee; Katrina A. See

2002-01-01

327

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

Microsoft Academic Search

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

Adriane B. Randolph

2012-01-01

328

Electron holography applied to the study of ceramic materials  

SciTech Connect

The experimental setup of a transmission electron microscope for electron holography is shown. Using a model system of small gold particles on amorphous germanium, capabilities of electron holography are demonstrated. These include nanodiffraction, energy filtering, correction of aberrations and separate display of image amplitude and phase. The method of electron holography is then applied to the characterization of a grain boundary in a Si{sub 3}N{sub 4} ceramic.

Voelkl, E.; Allard, L.F.; Nolan, T.A.

1993-09-01

329

The Use of Computer Technology by Older Adults.  

ERIC Educational Resources Information Center

The older adult (55+) population is becoming a significant presence in the personal computer market. Seniors have the discretionary income, experience, interest, and free time to make use of computers in interesting ways. A literature review found that older adults make use of computers in significant numbers: 30 percent of computer owners are…

Galusha, Jill M.

330

Optimizing alcohol production from whey using computer technology. [Kluyveromyces fragilis  

SciTech Connect

This study was undertaken with the major goal of optimizing the ethanol production from whey using computer technology. To reach this goal, a mathematical model that would describe the fermentation and that could be used for the optimization was developed. Kluyveromyces fragilis was the microorganism used to ferment the lactose in the whey into ethanol. Preliminary studies showed that K. fragilis produced about 90% of the theoretical ethanol yield when grown in whey-complemented media. However, when this yeast is grown in nonsupplemented whey media, it does not produce more than 32% of that yield. Comparative batch fermentations of lactose and whey-complemented media showed that whey possibly contains enhancing components for yeast growth and ethanol production. To obtain the mathematical model, the one-to-one effect of the process variables (lactose and yeast extract concentrations, air flow rate, pH, and dilution rate) on the ethanol production were first investigated. Experiments on the pH effect showed that a decrease in pH from 7 to 4 produced an increase in ethanol concentration from 16.5 to 26.5 g/L (50 g/L initial lactose). The results obtained from modeling of the continuous fermentation using the previously listed variables showed that air flow rate, pH, and dilution rate were the process variables that most influence the production of ethanol.

Zertuche, L.; Zall, R.R.

1985-01-01

331

All-digital holography and application in digital image hiding  

NASA Astrophysics Data System (ADS)

It is presented here that the all-digital holography is applied to the digital image hiding. Computer Generated Hologram is generated and reconstructed by numerical method. The secret message and the host message are all still gray-images. The secret image is first transformed into a hologram (CGH), which is called holographic transform and then Arnold transform is performed. DCT is applied in the host image. Then the secret image is embedded into the DCT middle coefficients. The application of the holographic transform improves the transparency of the secret image; by controlling the parameter of the hologram the secrecy of the image is enhanced and add another key to have invisibility and certain robust.

Zhao, Yajing; Zhong, Jingang

2005-02-01

332

Proceedings of seventh symposium on sharing of computer programs and technology in nuclear medicine, computer assisted data processing  

SciTech Connect

The Council on Computers (CC) of the Society of Nuclear Medicine (SNM) annually publishes the Proceedings of its Symposium on the Sharing of Computer Programs and Technology in Nuclear Medicine. This is the seventh such volume and has been organized by topic, with the exception of the invited papers and the discussion following them. An index arranged by author and by subject is included.

Howard, B.Y.; McClain, W.J.; Landay, M. (comps.)

1977-01-01

333

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

ERIC Educational Resources Information Center

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

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

2012-01-01

334

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.

335

Campus Computing, 2001: The 12th National Survey of Computing and Information Technology in American Higher Education.  

ERIC Educational Resources Information Center

|The 2001 Campus Computing Survey, the 12th such survey, is the largest continuing study of the role of computing and information technology in U.S. higher education today. The survey results in this report summarize data from 590 two- and four-year, public and private colleges across the United States, representing a 38.4% response rate. The…

Green, Kenneth C.

336

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

337

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

338

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

Microsoft Academic Search

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

Morris Jr. R. Franklin; Evelyn H. Thrasher

2008-01-01

339

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

340

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

341

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

342

The Probable State of Computer Technology by 1980, With Some Implications for Education.  

ERIC Educational Resources Information Center

|Based upon an assessment of new applications of computer technology and upon reasonable speculation about experimental projects that seem to offer particular promise, this paper considers some of the more significant developments in computer technology and their possible effects in education in 1980. A section on hardware discusses some current…

Blackwell, F. W.

343

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

344

The Application of Knowledge Elicitation Techniques in the Computer-based Technology Education Environment  

Microsoft Academic Search

he teaching of Technology Education is becoming increasing involved with the use of computer technology. Computers are now commonly used to enable students to control devices such as lathes, mills and robots, to acquire data for input into the process of improving the solutions to problems, to design new products through the use of CAD, to design and test electronic,

Ivan Chester

345

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

346

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

ERIC Educational Resources Information Center

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

Saleem, Mohammed M.

2009-01-01

347

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

Microsoft Academic Search

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

Alastair Robertson

348

Tech-Prep Competency Profiles within the Business/Computer Technologies.  

ERIC Educational Resources Information Center

This document, which is designed for educators throughout Ohio who are involved in planning and/or delivering tech prep programs within the business/computer technologies cluster, discusses and presents tech prep competency profiles (TCPs) for 12 business/computer technology occupations. The first part of the document contains the following:…

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

349

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

350

Culturally Responsive Uses of Computer Technology: A Portrait of Three Teachers Working in Urban Schools  

Microsoft Academic Search

There is a dire need to prepare all students, especially those most marginalized in the US, for the digital age. Unfortunately, access to and uses of the Internet and computer related technologies continue to be a persistent problem for many students. Since schools serve as one of the few access points for utilizing computer technologies, this article, using an interpretive

Rona Frederick; Kmt Shockley

351

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

Microsoft Academic Search

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

Anastasia Georgaki

352

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

ERIC Educational Resources Information Center

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

McErlain, Eileen; Squibb, Kevin

353

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

Microsoft Academic Search

To date, the major emphasis of educational technology researchers has been the development and use of educational technologies within school settings. Noticeably absent has been research and considerations that focus on the home as a computer-based learning environment and potential connections between school and home learning. Given the increasing presence of computers in homes, the authors argue for an explicit

Yasmin B. Kafai; Barry J. Fishman; AMY S. BRUCKMAN

2002-01-01

354

Aspects of Far-Field Holography.  

NASA Astrophysics Data System (ADS)

Far-field holography has been used as a tool for counting and sizing particles for many years. Still, there are significant gaps in its theoretical development that need to be filled. First, the theory must be developed in a suitably general form. Magnification must be included in both the formation and reconstruction steps. Magnification in the formation step causes information about the object to be encoded to lower spatial frequencies in the hologram. The resolution limits of far-field holography can be derived through geometrical and physical considerations. A resolution cell can be defined giving both lateral and longitudinal resolution. The extent of the hologram determines the size of the cell. The hologram is limited by the interaction of the object's Fourier transform with the granularity of the film--not by the film's MTF. Although this leads to no concise form for the resolution limits, it is possible to make general predictions of resolving power based on film type and object shape. Far-field holography proves to be resistant to noise. Additive noise that enters at the hologram does not affect the resolution in the final image, even though the hologram itself may be rendered indecipherable. If the object is illuminated by a noisy beam the resolution is still not affected provided the variations in the beam are small. Large variations degrade the image to the point where it can no longer be seen. Phased objects may also be visualized with far -field holography. The phase becomes visible in essentially the same manner as conventional coherent imaging. The amplitude impulse response function of the system interacts with abrupt changes in phase to show up the edges as drops in intensity. However, in far-field holography the image of a phase object is itself out of phase with the background and hence is visible. Real-time devices developed for optical processing may be used as holographic media in far-field holography. Although these devices have very low MTF cutoffs, the hologram may be recorded if magnification is used. By judicious use of magnification during formation and reconstruction, small particles may be recorded and working distances kept practical.

Cartwright, Steven Lee

1982-03-01

355

Computers for artificial intelligence a technology assessment and forecast  

Microsoft Academic Search

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

1986-01-01

356

Educational Technology Classics: The Computer versus the Clock  

ERIC Educational Resources Information Center

|It is no accident that the first use of computers in school systems was to arrange schedules for students and teachers. The proper use of the computer in the classroom is as a replacement for the clock and its strict temporal schedule. By conveying information through self-instructional content, the computer can schedule work for pupils in…

Slack, Charles W.

2010-01-01

357

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

358

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

359

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

360

Topics in Holography and Four Dimensional Superconformal Field Theories  

NASA Astrophysics Data System (ADS)

Strong dynamics in physical systems underpin a plethora of phenomena in nature. However, there had not exist many theoretical tools for probing such systems in quantum field theories until the discovery of supersymmetry and holography. In this thesis, we use these frameworks to study strongly coupled dynamics. In chapters two and three, we compute the entanglement entropy of several field theories at zero and finite temperature by using a holographic proposal. We find that the scaling of the entanglement entropy as a function of the size of the system is different in the various phases of the theory. This indicates that the entanglement entropy can be used to detect phase transitions in field theories. For all the systems we studied, we use the entanglement entropy to characterise the types of transitions present. In chapters four and five, we find consistent truncations of the fermionic sectors of M-theory and JIB superstring theory compactified on Sasaki-Einstein seven and five manifolds, respectively. The goal in these chapters is to provide string theory and M-theory embeddings of phenomenological studies of condensed matter systems in holography. We were unable to find truncations to a single fermion as is required by many models. The truncations also contain new types of couplings that were not studied in the literature. Thus we also provided motivations for new phenomenological models. In chapter six, we develop methods for constructing strongly interacting N = 1 superconformal field theories (SCFT) that contain Gaiotto's TN theories. We, then, propose the existence of many new four dimensional SCFT's. Finally in chapter seven, we study the low energy dynamics of M5-branes wrapping two dimensional Riemann surfaces inside a Calabi-Yau threefold. By using holography, we argue that the long distance physics is describe by a new class of four dimensional SCFT's. We, then, construct a set of supersymmetric field theories whose low energy limit correspond to a large subclass of these SCFT's. All of the field theories contain TN's and the constructions use tools developed in chapter six.

Bah, Ibrahima

361

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

ERIC Educational Resources Information Center

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

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

362

Technical education transfer: perceptions of employee computer technology self-efficacy  

Microsoft Academic Search

This study investigated influences on employee self-efficacy of computer technologies resulting from computer training programs that were intended to meet individual and organization objectives for university personnel. Subsequent to training, an assessment of employee computer technology self-efficacy was necessary for determining self-efficacious duration and the usefulness of technical education. A descriptive survey design was used to gather data from a

C. A Decker

1999-01-01

363

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

364

Computer Attitude of Teaching Faculty: Implications for Technology-Based Performance in Higher Education  

ERIC Educational Resources Information Center

|This study examined the validity of Selwyn's computer attitude scale (CAS) and its implication for technology-based performance of randomly sampled (n = 167) multidiscipline teaching faculty in higher education in Ghana. Considered, computer attitude is a critical function of computer attitude and potential performance. Composed of four…

Larbi-Apau, Josephine A.; Moseley, James L.

2012-01-01

365

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

366

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

ERIC Educational Resources Information Center

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

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

2002-01-01

367

The Future of Nursing in a Technological AgeComputers, Robots, and TLC  

Microsoft Academic Search

The computer has become a major tool in the medical treatment of disease. Computers can record vital signs, keep records, and provide central networks for interactive diagnosis. Individual medical histories can be contained in an optical card the size of a credit card. Advances in technology just over the horizon will permit an individual to consult a computer much as

Mary Lou Peck

1992-01-01

368

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

ERIC Educational Resources Information Center

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

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

369

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

370

Massively parallel X-ray holography  

NASA Astrophysics Data System (ADS)

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

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

2008-09-01

371

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

372

The Technology Fix: The Promise and Reality of Computers in Our Schools  

ERIC Educational Resources Information Center

|During the technology boom of the 1980s and 1990s, computers seemed set to revolutionize education. Do any of these promises sound familiar? (1) Technology would help all students learn better, thanks to multimedia programs capable of adapting to individual needs, learning styles, and skill levels; (2) Technology would transform the teacher's…

Pflaum, William D.

2004-01-01

373

Finding a Balance: Computer Software, Intellectual Property and the Challenge of Technological Change.  

ERIC Educational Resources Information Center

|This report, prepared by the Office of Technological Assessment (OTA) in response to a request from the House Committee on the Judiciary, examines the rapid and complex technological changes and trends in computer software technologies and their possible effects on the nation's intellectual property system. The three policy issues identified are:…

Congress of the U.S., Washington, DC. Office of Technology Assessment.

374

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

Microsoft Academic Search

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

G. Premkumar; Michael Potter

1995-01-01

375

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

376

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

Microsoft Academic Search

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

Farzad Ehsani; Eva Knodt

1998-01-01

377

Finding a Balance: Computer Software, Intellectual Property and the Challenge of Technological Change.  

ERIC Educational Resources Information Center

This report, prepared by the Office of Technological Assessment (OTA) in response to a request from the House Committee on the Judiciary, examines the rapid and complex technological changes and trends in computer software technologies and their possible effects on the nation's intellectual property system. The three policy issues identified are:…

Congress of the U.S., Washington, DC. Office of Technology Assessment.

378

Digital holography forquantitative phase-contrast imaging  

Microsoft Academic Search

We present a new application of digital holography for phase-contrast imaging and optical metrology. This holographic imaging technique uses a CCD camera for recording of a digital Fresnel off-axis hologram and a numerical method for hologram reconstruction. The method simultaneously provides an amplitude-contrast image and a quantitative phase-contrast image. An application to surface profilometry is presented and shows excellent agreement

Etienne Cuche; Frédéric Bevilacqua; Christian Depeursinge

1999-01-01

379

Digital Holography at Shot Noise Level  

Microsoft Academic Search

By a proper arrangement of a digital holography setup, that combines off-axis geometry with phase-shifting recording conditions, it is possible to reach the theoretical shot noise limit, in real-time experiments. We studied this limit, and we show that it corresponds to 1 photo-electron per pixel within the whole frame sequence that is used to reconstruct the holographic image. We also

Frédéric Verpillat; Fadwa Joud; Michael Atlan; Michel Gross

2010-01-01

380

Digital Holography Methods in 3DTV  

Microsoft Academic Search

A promising approach to 3D-TV is the concept of digital holography. One way is to record the interference pattern which is generated by superposition of the wave field reflected from the scene and a mutually coherent reference wave by a CCD-or CMOS-array, transmitting the data, and displaying the wave field by feeding the data to a spatial light modulator which

T. Kreis

2007-01-01

381

Schrödinger wave holography in brain cortex  

Microsoft Academic Search

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

Renato Nobili

1985-01-01

382

Holography and noncommutative yang-mills theory  

PubMed

In this Letter a recently proposed gravity dual of noncommutative Yang-Mills theory is derived from the relations between closed string moduli and open string moduli recently suggested by Seiberg and Witten. The only new input one needs is a simple form of the running string tension as a function of energy. This derivation provides convincing evidence that string theory integrates with the holographical principle and demonstrates a direct link between noncommutative Yang-Mills theory and holography. PMID:11017215

Li; Wu

2000-03-01

383

Quantitative phase microscopy with asynchronous digital holography  

Microsoft Academic Search

We demonstrate a new method of measuring quantitative phase in biological materials. The method utilizes asynchronous digital holography, which uses a moving fringe created by acousto-optic modulators. Results are demonstrated on live cell samples. OCIS codes:(090.2880, 110.1650) Holographic interferometry, coherence imaging. Cells are dynamic entities, constantly adjusting their biophysical properties to stay in equilibrium with their environment. An understanding of

Kevin J. Chalut; William J. Brown; Neil Terry

2007-01-01

384

Digital holography from shadowgraphic phase estimates  

Microsoft Academic Search

Digital phase front retrieval from inline, Gabor-type holograms has to overcome the challenge of separating the object wave from its conjugate by retrieving the phase of the optical field. Recently, the so-called 'twin image problem' has received revived interest, mainly in conjunction with lens-less digital holography applications in the XUV or X-ray bands. In this context, we propose to use

Falk Eilenberger; Dimitris Pliakis; Stefano Minardi; Thomas Pertsch

2010-01-01

385

X-Ray Holography with Atomic Resolution  

NASA Astrophysics Data System (ADS)

In the conventional diffraction experiments only the intensity of the scattered radiation is recorded, its phase is lost. In holography [1], the scattered radiation is mixed with a reference wave and the resulting interference pattern is recorded. The hologram contains both the intensity and the phase information and the three dimensional image of the object can be reconstructed. The most important limitation of this imaging technique is the spatial resolution, which is given by the wavelength and/or by the source size. In the last decade the introduction of soft x-ray instead of visible light tremendously improved the resolution which reached a few hundred angstrom [2]. An other line in holography, based on the inside source concept, was suggested recently [3]. We have applied this concept for the case of fluorescent x-rays emitted by a single crystal. We were the first to demonstrate theoretically [4] and experimentally [5] the feasibility of x-ray holography with atomic resolution. We have recorded the holograms of different crystals and successfully reconstructed the three dimensional order of the atoms. [1] D. Gabor, Nature 161, 777 (1948). [2] M. Howels, C. Jacobsen, J. Kirz, R. Feder, K. McQuaid and S. Rothman, Science 238, 514 (1987). [3] A. Szöke, in Short Wavelength Coherent Radiation: Generation and Applications, T. Attwood, J. Booker (eds), AIP Conference Proceedings No. 147, New York (1986). [4] M. Tegze and G. Faigel, Europhys. Lett. 16, 41 (1991). [5] M. Tegze and G. Faigel, Nature 380, 49 (1996).

Tegze, Miklós

1997-03-01

386

Holography in the high school laboratory  

NASA Astrophysics Data System (ADS)

During the past ten years a number of workshops were conducted which introduced holography into about 25 high schools in central Indiana. Sand box systems were constructed. Participants were provided with minimal equipment including a 5 mW laser and associated optics. both reflection and transmission holograms were produced. The workshops included several phases. During the first phase teachers were introduced to basic principles and gained hands-on experience with their systems. During the second phase staff visits to the classes assisted teachers in implementation. During the third phase teachers brought selected students for training and review. Second year workshops utilized first year participants as workshop trainers. Workshops were concluded with a review session which included a section on curriculum design to include holography in the physics lesson planning. Continuing enthusiasm for optics and specifically holography suggests that this is a great way to generate science interest in the secondary schools. The workshops were supported with Eisenhower funds administered by the Indiana Commission for Higher Education.

Hansen, Uwe J.; Swez, John A.

1995-10-01

387

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

388

Acoustic holography. Citations from the Engineering Index data base  

Microsoft Academic Search

Worldwide research on acoustic holography is covered. Theory, uses, equipment design, and imaging techniques are presented. Most of the studies are general and not applied to a specific use of acoustic holography. However, there are citations which do discuss its use in medicine, nuclear reactors, and nondestructive testing. This updated bibliography contains 328 citations, 34 of which are new entries

W. E. Reed

1980-01-01

389

Acoustic holography. Citations from the engineering index data base  

Microsoft Academic Search

Worldwide research on acoustic holography is covered. Theory, uses, equipment design, and imaging techniques are presented. Most of the studies are general and not applied to a specific use of acoustic holography. However, there are citations which do discuss its use in medicine, nuclear reactors, and nondestructive testing. (This updated bibliography contains 242 abstracts, 32 of which are new entries

W. E. Reed

1978-01-01

390

Acoustic holography. Citations from the Engineering Index data base  

Microsoft Academic Search

Worldwide research on acoustic holography is covered. Theory uses, equipment design, and imaging techniques are presented. Most of the studies are general and not applied to a specific use of acoustic holography. However, there are citations which do discuss its use in medicine, nuclear reactors, and nondestructive testing. This updated bibliography contains 294 abstracts, 51 of which are new entries

W. E. Reed

1979-01-01

391

Holography and Art - Using rainbow hologram in my works  

NASA Astrophysics Data System (ADS)

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

Cho, Duck Hee

2013-02-01

392

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

Microsoft Academic Search

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

Biao Zhang; Jianjun Wang; Thomas Fuhlbrigge

2010-01-01

393

Strategies for Introducing Computer Technologies into a Biology Laboratory Program  

ERIC Educational Resources Information Center

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

Tillotson, Joanne Kivela

2002-01-01

394

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

395

Computational chemistry on catalyst technology and international collaboration  

Microsoft Academic Search

The computational simulation of a system with multiple molecules (molecular assemblies) is an important area to be developed. This paper presents an outline of recent advances in computational chemistry, especially focusing on catalyst research and development. It also views a project taking place through international collaboration.

Yasumasa Arai

1995-01-01

396

Strategies for Introducing Computer Technologies into a Biology Laboratory Program  

ERIC Educational Resources Information Center

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

Tillotson, Joanne Kivela

2002-01-01

397

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

398

Real world objects: capturing using in-line digital holography, projecting using spatial light modulators  

NASA Astrophysics Data System (ADS)

Digital holography is the process where an object's phase and intensity information is retrieved from intensity images obtained using a digital camera (CCD or CMOS sensor). Unlike off-axis holography, object information is not modulated onto carrier fringes, thus in-line digital holography makes optimum use of the recording device's sampling bandwidth resulting in higher resolution digital holograms. However, reconstructed images are obscured by the linear superposition of the unwanted out of focus twin images. In addition to this, speckle noise degrades overall quality of the reconstructed images. The speckle effect is an optical phenomenon arising when laser sources are used in digital holographic systems. Minimizing the effects due to speckle noise, removal of the twin image and using the full sampling bandwidth of the capture device, aids overall reconstructed image quality. Using interferometric techniques, it is possible to record whole field information about an object. Digital processing of the reconstructed holograms can remove or suppress the twin image while effects from speckle noise can also be reduced numerically. Machine vision techniques can then be applied to segment and distinguish objects of interest in the hologram. Coding the resulting phase information onto a spatial light modulator (SLM), real world, three dimensional images of objects can be reconstructed using the computer generated hologram.

Ryle, James P.; Monaghan, David S.; McDonnell, Susan; Sheridan, John T.

2009-08-01

399

Applications of holography to condensed matter physics  

NASA Astrophysics Data System (ADS)

Holography is one of the key insights to emerge from string theory. It connects quantum gravity to field theory, and thereby provides a non-perturbative formulation of string theory. This has enabled progress on a range of theoretical issues, from the quantum description of spacetime to the calculation of scattering amplitudes in supersymmetric field theories. There have been important insights into both the field theories and the spacetime picture. More recently, applied holography has been the subject of intense and rapid development. The idea here is to use the spacetime description to address questions about strongly coupled field theory relevant to application areas such as finite-temperature QCD and condensed matter physics; the focus in this special issue is on the latter. This involves the study of field theory at finite temperature and with chemical potentials for appropriate charges, described in spacetime by charged black hole solutions. The use of holography to study these systems requires a significant extrapolation, from the field theories where classical gravitational calculations in the bulk are a useful approximation to the experimentally relevant theories. Nonetheless, the approach has had some striking qualitative successes, including the construction of holographic versions of superconducting or superfluid phase transitions, the identification of Fermi liquids with a variety of thermal behaviours, and the construction of a map between a class of gravity solutions and the hydrodynamic regime in the field theory. The use of holography provides a qualitatively new perspective on these aspects of strong coupling dynamics. In addition to insight into the behaviour of the strongly coupled field theories, this work has led to new insights into the bulk dynamics and a deeper understanding of holography. The purpose of this focus issue is to strengthen the connections between this direction and other gravitational research and to make the gravity community more aware of these developments. The issue is made up of original research contributions at the forefront of this area, giving a sense of the range of activity and presenting significant new contributions. Simon F RossGuest Editor

Ross, Simon F.

2012-10-01

400

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

401

Reviews of computing technology: Fiber distributed data interface  

Microsoft Academic Search

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

Johnson

1991-01-01

402

Reviews of computing technology: Fiber distributed data interface  

Microsoft Academic Search

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

Johnson

1991-01-01

403

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

NASA Astrophysics Data System (ADS)

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

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

2010-08-01

404

Implementation of Parallel Computing Technology to Vortex Flow.  

National Technical Information Service (NTIS)

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 trac...

J. Dacles-Mariani

1999-01-01

405

JPRS Report, Science & Technology, China, Optical Computing & Memory.  

National Technical Information Service (NTIS)

This JPRS report from China contains articles on Optical Computing and Memory. Some of the articles are Optical Parallel Multiple Matrix Multiplier; Experimental Research on Optical Parallel Multiple Matrix Multiple; Optical Multistability, Multi-Valued L...

1992-01-01

406

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

407

Process for making products using waterjet technology and computer software  

US Patent & Trademark Office Database

A kit of components and a process which combines the use of water cutting and computer software to create design art images for insertion in interlocking pavers that can interlock with pre-manufactured pavers.

Seroka; John M. (Medford, NJ); Nichiporuk; Joseph E. (Marlton, NJ)

2003-09-09

408

Hospital Organization and Computer Technology: The Challenge of Change.  

National Technical Information Service (NTIS)

This is an assessment of the impact of the implementation of a computer-assisted hospital information system. The study reports 5 years of research utilizing available records, (staffing assignments, PAS reports, meetings), surveys, interviews and observa...

B. Goldstein C. Farlee

1972-01-01

409

Computer aided manufacturing technology transfer needs in Florida  

Microsoft Academic Search

Automation and computers could improve the profitability of a manufacturing organization. While automation is primarily used\\u000a to perform physical manufacturing tasks, computers are used for both information-type tasks and physical manufacturing tasks.\\u000a If the manufacturing operations and personnel, as well as the flow of information, material, and energy, could be integrated\\u000a to perform well-planned sequences of tasks to manufacture families

A. J. G. Babu

1995-01-01

410

AEDS Proceedings: The Tomorrow in New Technology; Frontiers in Administrative Computing; Adventures in Instructional Computing.  

ERIC Educational Resources Information Center

|The 122 papers in this collection were presented in 15 sessions of the 20th annual convention of the Association for Educational Data Systems which was held in Orlando, Florida, May 10-14, 1982. Individual papers covered a wide variety of topics, including computer assisted instruction, computer managed instruction, computer literacy,…

Association for Educational Data Systems, Washington, DC.

411

Thermoplastic Recording Materials for Holography.  

National Technical Information Service (NTIS)

Recording materials with photoconductive and thermoplastic layers for the registration of phase holograms were developed. After adaption of the sensitometric properties, the coating technology for the production of such materials was elaborated. Devices f...

R. Moraw

1977-01-01

412

'Please do not lean on the computer. It has feelings too.': The relationships transferred by humans to technology  

Microsoft Academic Search

This thesis explores technology and computer transference. Technology and computer transference refers to the understandings about people and animals projected onto technologies and computers. It describes a 'felt' sense of the object as an 'Other', as a social entity and agent. A methodology for examining transference was developed and trialled during a series of three studies to determine its frequency,

Jocelyn R Harper

2007-01-01

413

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

414

Computer Security Incident Handling Guide: Recommendations of the National Institute of Standards and Technology.  

National Technical Information Service (NTIS)

Computer security incident response has become an important component of information technology (IT) programs. Security-related threats have become not only more numerous and diverse but also more damaging and disruptive. New types of security-related inc...

K. Masone K. Scarfone T. Grance

2008-01-01

415

Computer Security Incident Handling Guide. Recommendations of the National Institute of Standards and Technology.  

National Technical Information Service (NTIS)

Computer security incident response has become an important component of information technology (IT) programs. Security-related threats have become not only more numerous and diverse but also more damaging and disruptive. New types of security-related inc...

B. Kim K. Kent T. Grance

2004-01-01

416

Municipal Information Systems: Evaluation of Policy Related Research. Volume IV. Computing Technology and Information Management Policy.  

National Technical Information Service (NTIS)

Volume 4 is one of 10 volumes evaluating policy-related research on municipal information systems. It discusses technologies for information management, which include data base management systems, distributed computing, system building, and geoprocessing....

R. D. Hackathorn

1974-01-01

417

TIS(Technology Information System): An Intelligent Gateway Computer for Information and Modeling Networks - Overview.  

National Technical Information Service (NTIS)

The Technology Information System (TIS) is being used to develop software for Intelligent Gateway Computers (IGC) suitable for the prototyping of advanced, integrated information networks. Dedicated to information management, TIS leads the user to availab...

V. E. Hampel C. Bailey R. A. Kawin N. A. Lann S. K. McGrogan

1983-01-01

418

National Institute of Standards and Technology, Computer Security Division Annual Report, 2010.  

National Technical Information Service (NTIS)

The Computer Security Division (CSD), a component of NISTs Information Technology Laboratory (ITL), conducts research, development and outreach necessary to provide standards and guidelines, tools, metrics and practices to protect our nations information ...

2010-01-01

419

DoD Information Technology Modernization: A Recommended Approach to Data Center Consolidation and Cloud Computing.  

National Technical Information Service (NTIS)

How should the Department of Defense (DoD) apply best business practices to Information Technology (IT) modernization, Data Center Consolidation (DCC), and the efficient, effective, and secure implementation of Cloud computing to support DoD business appr...

A. Vashistha B. Cohen D. Langstaff K. Walker P. Gross

2012-01-01

420

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

ERIC Educational Resources Information Center

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

Morris, Kathleen M.

2010-01-01

421

Instructor and Student Classroom Interactions during Technology Skills Instruction for Facilitating Preservice Teachers' Computer Self-Efficacy  

ERIC Educational Resources Information Center

Technology skills instruction is an important component of educational technology courses, which has been shown to raise pre-service teachers' computer self-efficacy. Computer self-efficacy, in turn, is positively related to their self-efficacy for technology integration. Studies of undergraduate technology skills instruction found that classroom…

Koh, Joyce H. L.; Frick, Theodore W.

2009-01-01

422

Instructor and Student Classroom Interactions during Technology Skills Instruction for Facilitating Preservice Teachers' Computer Self-Efficacy  

ERIC Educational Resources Information Center

|Technology skills instruction is an important component of educational technology courses, which has been shown to raise pre-service teachers' computer self-efficacy. Computer self-efficacy, in turn, is positively related to their self-efficacy for technology integration. Studies of undergraduate technology skills instruction found that classroom…

Koh, Joyce H. L.; Frick, Theodore W.

2009-01-01

423

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…

Lakeland Tech Prep Consortium, Kirtland, OH.

424

Computed tomography—old ideas and new technology  

Microsoft Academic Search

Several recently introduced ‘new’ techniques in computed tomography—iterative reconstruction, gated cardiac CT, multiple-source,\\u000a and dual-energy CT—actually date back to the early days of CT. We review the historic origins and evolution of these techniques,\\u000a which may provide some insight into the latest innovations in commercial CT systems.

Dominik Fleischmann; F. Edward Boas

2011-01-01

425

Children and Computers: New Technology--Old Concerns.  

ERIC Educational Resources Information Center

|Places current research on children and computers in historical context with earlier research on the mass media, noting recurrent patterns in 20th century media research. Concludes that to inform and sustain the creation of more quality content for children, further research is needed on the effects of media on children, with new partnerships…

Wartella, Ellen A.; Jennings, Nancy

2000-01-01

426

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

427

Technology Allows Engineers to Make Solid Objects from Computer Designs.  

ERIC Educational Resources Information Center

|Computer operators using the technique of three-dimensional printing or rapid prototyping may soon be able to sculpt an object on the screen and within minutes, have a paper, plastic, or ceramic version of the object in hand. The process uses the principle that physical objects can be created in layers. (MSE)|

Wheeler, David L.

1992-01-01

428

Computer Technology Can Enhance Presentation of Pharmacological Principles.  

ERIC Educational Resources Information Center

The use of liquid crystal display (LCD) techniques for projection of computer monitor images onto a large screen for classroom viewing is discussed and illustrated with a pharmacology class presentation on drug/neurotransmitter-receptor interactions. The method is seen as a way of bringing a new dynamic to visual instruction. (MSE)

Riffee, William H.

1991-01-01

429

Adults' Uses of Computer Technology: Associations with Literacy Tasks  

ERIC Educational Resources Information Center

The present study examined data from a large, nationally representative sample--the National Assessment of Adult Literacy (NCES, 2007)--to examine how computer use and Internet-based literacy practices (use of e-mail, searching for information on the Internet, and Internet chatting) were related to prose, document, and quantitative literacy…

Smith, M. Cecil; Smith, Thomas J.

2010-01-01

430

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

431

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

432

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

433

Computed tomography--old ideas and new technology.  

PubMed

Several recently introduced 'new' techniques in computed tomography--iterative reconstruction, gated cardiac CT, multiple-source, and dual-energy CT--actually date back to the early days of CT. We review the historic origins and evolution of these techniques, which may provide some insight into the latest innovations in commercial CT systems. PMID:21249371

Fleischmann, Dominik; Boas, F Edward

2011-01-20

434

COMPUTER MODEL TECHNOLOGY TRANSFER IN THE UNITED STATES  

EPA Science Inventory

Computer-based mathematical models for urban water resources planning, management and design are widely used by engineers and planners in both the public and private sectors. In the United States, the majority of the users are in the private (consulting) sector, yet most of the m...

435

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

ERIC Educational Resources Information Center

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

Adams, Ruifang Hope; Strickland, Jane

2012-01-01

436

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

437

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

ERIC Educational Resources Information Center

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

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

438

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

ERIC Educational Resources Information Center

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

Vigdor, Jacob L.; Ladd, Helen F.

2010-01-01

439

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

440

Strela-1, the First Soviet Computer: Political Success and Technological Failure  

Microsoft Academic Search

Which computer was developed first in the Soviet Union? Which one was first successful? Such questions are difficult to answer, but recently declassified archival material may hold the key. The story of the Strela illustrates how competing interests helped determine the fate of this computer, a political success but a technological failure. This article examines the interests and behavior of

Hiroshi Ichikawa

2006-01-01

441

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

442

Character traits and basic, cognitive, social, and technological skills for telecommuting: implications for the computing curriculum  

Microsoft Academic Search

Advances in the area of telecommunications technology have profoundly affected the options employees have in terms of where and how they perform their work, and the number of computing professionals who telecommute (i.e., work at least part of their workweek away from their regular office) continues to increase. Undoubtedly, many of our own computing students will eventually telecommute to some

Robert E. Beasley; Virginia R. Seubert; Ewuuk Lomo-david

2001-01-01

443

JTEC Panel Report on Human-Computer Interaction Technologies in Japan.  

National Technical Information Service (NTIS)

This report reviews the status of Japanese R&D in human-computer interaction (HCI) technologies and applications. It covers fundamental HCI research; R&D and applications in computer-supported collaborative work (CSCW), information network services and in...

J. D. Foley E. P. Glinert J. D. Hollan R. E. Kraut T. B. Sheridan T. Skelly

1996-01-01

444

Contributing to Quality of Life: A New Outcome Variable for Information Technology in Ubiquitous Computing Environments  

Microsoft Academic Search

The rapid spread of technological innovations like mobile data services (MDS) has made ubiquitous computing a fact of everyday life for many people. We need therefore to understand the contribution of ubiquitous computing to overall quality of life. This study proposes a theoretical model that connects user satisfaction (a traditional outcome variable of IT) with contributions to quality of life

Minkyung Lee; Jinwoo Kim; Hun Choi; Dongjin Lee; Kun Shin Im

2005-01-01

445

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

446

Technology Assessment of Computer-Aided-Design in the American Footwear Industry.  

National Technical Information Service (NTIS)

The technology assessment of computer-aided-design (CAD) in the American footwear industry has a two-fold objective: (1) to identify viable applications of computer-aided-design to the footwear industry, and (2) to assess the likely technical, economic, a...

E. E. Sweezy S. J. Hart

1980-01-01

447

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

448

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

National Technical Information Service (NTIS)

The paper is a discussion of the state-of-the-art of hardware technology for computers in education. The choices that are available to the user, and the questions the user must ask himself before making a choice of computer hardware are discussed. An exam...

R. J. Seidel

1974-01-01

449

Embedding Computer Technology in Developmentally Appropriate Practice: Engaging with Early Years Professionals' Beliefs and Values  

ERIC Educational Resources Information Center

|The use of computers in early years has become a contentious issue, with advocates calling for more Information and Communications Technology (ICT), more machines, better software, and more training for professionals, while other groups call for "a moratorium on the further introduction of computers in early childhood and elementary education"…

Hall, Elaine; Higgins, Steven

2002-01-01

450

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

451

Scope of the Uniform Commercial Code: Advances in Technology and Survey of Computer Contracting Cases  

Microsoft Academic Search

Since the 1940s, the technology revolution has enabled people to communicate electronically. Sitting at a computer terminal connected to a modem and a telephone wire, it is possible to send a message anywhere in the country (or throughout the world)—to another computer, to a telecopy or telefax machine, even to a telephone. Paper is being replaced by electronic signals as

Harold R. Weinberg; Ameila H. Boss; Woodward William J. Jr

1993-01-01

452

Computer Technology Awareness by Elementary School Teachers: A Case Study from Turkey  

Microsoft Academic Search

This study showed that gender, years of teaching, and school status have a significant relationship to fa- miliarity with computer technologies in Turkey. Lack of hardware, lack of knowledge and skills about using computers, lack of training or insufficient training opportunities, and crowded classrooms were determined as the most important problems that basic education schools face in Turkey. Data suggest

Askin Asan

2003-01-01

453

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

Microsoft Academic Search

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

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

2009-01-01

454

Digital holography from shadowgraphic phase estimates  

NASA Astrophysics Data System (ADS)

Digital phase front retrieval from inline, Gabor-type holograms has to overcome the challenge of separating the object wave from its conjugate by retrieving the phase of the optical field. Recently, the so-called 'twin image problem' has received revived interest, mainly in conjunction with lens-less digital holography applications in the XUV or X-ray bands. In this context, we propose to use a recently devised algorithm, the iterative shadowgraphy method (ISM), to solve the twin-image problem and use the retrieved phase front for digital holography applications. The algorithm is based on the principle that the measurement of phase gradients, which drive the diffraction process, enable the retrieval of the transverse phase profile of a field by observing its intensity distribution on different propagation planes. We have proven rigorously that for small phase modulated object waves, the algorithm converges to the correct object wavefront using just two snapshots of the propagated intensity field as input. Because the algorithm is akin to a deconvolution algorithm, experimental noise can destabilize the iteration scheme. In this work, we discuss the influence of noise in the ISM and apply a wavelet-based scheme to regularize the data. We show that the phase retrieved from two experimental, defocused pictures of a weakly absorbing, scattering object can be used to accurately reconstruct the object trough numerical back-propagation. Thus we prove that ISM is suitable for digital holography applications. We compare the ISM to various other schemes, such as direct backpropagation and the Gerchberg-Saxton algorithm and find that the ISM scheme gives a much improved reconstruction of the phase front.

Eilenberger, Falk; Pliakis, Dimitris; Minardi, Stefano; Pertsch, Thomas

2010-04-01

455

Ethereal presences in holography and photography  

NASA Astrophysics Data System (ADS)

This paper examines the concept of the 'Presence of Absence' in post-mortem photography and holography, drawing upon both historical and lesser-known images as reference. To create a photographic negative one needs the presence of light to expose the light sensitive surface, be it glass, a polished plate or plastic. A hologram may also be created when a coherent light source, for example from a Laser, travels through a light sensitive material and falls upon the subject to be recorded. A holograph however, retains the optical qualities of both phase and amplitude, the memory of light. Both mediums recall, as it were, 'now absent moments', and confronts us with what is 'not there' as much as 'what is'. This paper examines the exploration of absence and presence in post-mortem photography and holography and it's a richly visceral visual language. A photonic syntax can interpret death as an elegant yet horrific aesthetic, the photograph may be beautify screened and yet obscene in its content. In essence one can be a voyeur, experiencing a mere visual whisper of the true nature of the subject. Our Victorian forefathers explored postmortem photography as an object of mourning, and at the close of the nineteenth century when Jack the Ripper had the inhabitants of White Chapel in a grip of fear, photography made its mark as a documentation of violent crime. Today, within contemporary photography, death is now presented within the confines of the 'Art Gallery', as a sensual, and at times, sensationalised art form. In exploring post-mortem imagery, both in holography and conventional photography, absence presents an aspect of death as startling in its unanimated form and detailed in its finite examination of mortality.

Richardson, M.; Byrne, Kay

2007-03-01

456

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

457

Computer-Aided Analysis of Patents for Product Technology Maturity Forecasting  

NASA Astrophysics Data System (ADS)

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

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

458

Educational Computing in the Schools: Technology, Communication, and Literacy.  

ERIC Educational Resources Information Center

|This book is a collection of articles that examine critical issues of technology, teaching, and learning in three areas: access, communication, and literacy. Following an Introduction by Jay Blanchard, articles are presented in three sections: Access and Opportunity; Online Communication; and Literacy. The articles include: "An Exploration of…

Blanchard, Jay, Ed.

459

Theories of Learning and Computer-Mediated Instructional Technologies  

Microsoft Academic Search

The aim of this paper is to describe the dominant schools of thought in relation to learning theories and how computermediated technologies can be integrated in relation to these theories. A framework is proposed for integrating the learning theories, situating the use of these learning theories in different instructional contexts. Hence, instead of regarding the learning theories as discordant, it

David Hung

2001-01-01

460

Evaluation of a computer networking class in information technology  

Microsoft Academic Search

Information Technology (IT) is a rapidly-developing discipline. IT instructors often design new courses to meet changing needs. There is also a need to evaluate courses once they have been designed and implemented. Evaluation of courses leads to improvements in the learning experiences for students and better understanding of the educational process and outcomes for course designers and instructors. Evaluation and

C. Richard G. Helps; Joseph J. Ekstrom

2008-01-01

461

The Poetics of Computers: Composing Relationships with Technology.  

ERIC Educational Resources Information Center

Describes a course with three primary goals: to help students reflect on the complex relationship between humans and technology; to reflect on students' responsibility for shaping this relationship in contemporary contexts; and to provide opportunities within which to practice composing this relationship in personal terms. Concludes that in such…

Longo, Bernadette; Reiss, Donna; Selfe, Cynthia L.; Young, Art

2003-01-01

462

Computer-automated multiparadigm modeling in control systems technology  

Microsoft Academic Search

The use of model-based technologies has made it imperative for the development of a feedback control system to deal with many different tasks such as: plant modeling in all its variety; model reduction to achieve a complexity or level of abstraction suitable for the design task at hand; synthesis of control laws that vary from discrete event reactive control to

P. J. Mosterman; J. Sztipanovits; S. Engell

2004-01-01

463

Duquesne University and St. Philip's School Collaborate To Bring Wireless Computer Technology to the Classroom.  

ERIC Educational Resources Information Center

|Describes a collaboration among St. Philip Elementary School, Canevin Catholic High School and Duquesne University (all in Pennsylvania) to integrate technology into the kindergarten-through 12 curriculum. Wireless technology and transportable laptop computers were funded by a grant, and minimal structural modifications were made to the…

Tomei, Lawrence A.; Huth, Cathy; Ravenstahl, Heather

2001-01-01

464

Technologically and artistically enhanced multi-sensory computer-programming education  

Microsoft Academic Search

Over the last decades more and more research has analysed relatively new or rediscovered teaching–learning concepts like blended, hybrid, multi-sensory or technologically enhanced learning. This increased interest in these educational forms can be explained by new exciting discoveries in brain research and cognitive psychology, as well as by the accelerated integration of technology (computers, intranets, internet, etc.) in education. We

Zoltan Katai; Laszlo Toth

2010-01-01

465

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

Microsoft Academic Search

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

Albert F. Case Jr.

1985-01-01

466

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

Microsoft Academic Search

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

Fen-Hui Lin; Hsing-Ya Chang

2006-01-01

467

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

EPA Science Inventory

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

468

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

Microsoft Academic Search

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

Bryan N. Alexander

2008-01-01

469

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

470

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

ERIC Educational Resources Information Center

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

Wainer, Allison L.; Ingersoll, Brooke R.

2011-01-01

471

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

472

Towards the Unremarkable Computer: Making Technology at Home in Domestic Routine  

Microsoft Academic Search

We have shown how lessons that challenge and can help develop the ubiquitous computing agenda in the direction of technologies being “invisible in use” can be drawn from studying the domestic environment. In particular, recognising the subtle character of the often complex, yet unremarkable, details that surround our everyday routines places powerful requirements on any technology that might become embedded

Peter Tolmie; James Pycock; Tim Diggins; Allan MacLean; Alain Karsenty

473

Computing Technology for Learning - in Need of a Radical New Conception  

Microsoft Academic Search

Many have had high expectations for the impact of computer-based technology on educational practice. By and large, these expectations have not been realised. It has become evident that innovative technology alone does not necessarily guarantee progress - nor perhaps even significant change - in educational practice. This has led educational researchers to place greater emphasis on cultural issues that could

Meurig Beynon

2007-01-01

474

Integrating Computer Technology into a Balanced Literacy Approach: Beyond Interactive Books and Word Processors.  

ERIC Educational Resources Information Center

|Until recently, computer technology has been used as a glorified worksheet, word processor, and CD-ROM interactive reader. Now, technology can move well beyond these basic functions into improving literacy skills and strategies, problem solving, and communication. This paper addresses methods in which a balanced literacy program, wherein the…

Lund, David; Angell, Verlinda Thompson; Atwood, Karen

475

Community Colleges in the Information Age: Gains Associated with Students' Use of Computer Technology  

ERIC Educational Resources Information Center

Computer literacy is increasingly important in higher education, and many educational technology experts propose a more prominent integration of technology into pedagogy. Empirical evidence is needed to support these theories. This study examined community college students planning to transfer to 4-year universities and estimated the relationship…

Anderson, Bodi; Horn, Robert

2012-01-01

476

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

477

The high performance computing and communications (HPCC) program: technologies for the national information infrastructure  

Microsoft Academic Search

The Federal HPCC Program is a 10-agency billion dollar per year effort to accelerate the development of high performance computing and communications technologies and the diffusion of these technologies to improve U.S. competitiveness and the well-being of citizens.

Donald A. B. Lindberg; John C. Toole; Paul R. Young; John S. Cavallini; Lee B. Holcomb; Richard J. Linn Jr.; George R. Cotter; Helen M. Wood; Joan H. Novak; Alexis T. Poliakoff

1994-01-01

478

The High Performance Computing and Communication (HPCC) Program (panel): technologies for the National Information Infrastructure  

Microsoft Academic Search

The Federal HPCC program is a 10-agency billion dollar per year effort to accelerate the development of high performance computing and communications technologies and the diffusion of these technologies to improve U.S. competitiveness and the well-being of citizens.

Donald A. B. Lindberg; John C. Toole; Paul R. Young; John S. Cavallini; Lee B. Holcomb; R. J. Linn; George R. Cotter; Helen M. Wood; Joan H. Novak; Alexis T. Poliakoff

1994-01-01

479

A Review of Computer-Based Technology Integration in Urban and High Poverty Schools  

ERIC Educational Resources Information Center

|Despite the fact that current reforms in education have placed significant emphases on the integration of computer-based technology in the curriculum and the use of it to improve teaching and learning, researchers reveal that effective technology pedagogy that assists to increase student achievement is not always used in urban and high poverty…

Daniel, Annie J.

2004-01-01

480

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

ERIC Educational Resources Information Center

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

Sorensen, Birgitte Holm

2005-01-01

481

Research on large power computer controlled constant current power source technologies  

Microsoft Academic Search

At present, the technology of the small current, low-power and high stability constant current source is more mature. However the technology of high current, high power and high stability computer controlled constant current power source is still in the exploratory stage. After studying the principles of the constant current source and the internal working principle about switching power supply chip

Zhou Yinggang; Jiang Xue; Xie Yangen

2009-01-01

482

Electron holography for fields in solids: problems and progress.  

PubMed

Electron holography initially was invented by Dennis Gabor for solving the problems raised by the aberrations of electron lenses in Transmission Electron Microscopy. Nowadays, after hardware correction of aberrations allows true atomic resolution of the structure, for comprehensive understanding of solids, determination of electric and magnetic nanofields is the most challenging task. Since fields are phase objects in the TEM, electron holography is the unrivaled method of choice. After more than 40 years of experimental realization and steady improvement, holography is increasingly contributing to these highly sophisticated and essential questions in materials science, as well to the understanding of electron waves and their interaction with matter. PMID:23831133

Lichte, Hannes; Börrnert, Felix; Lenk, Andreas; Lubk, Axel; Röder, Falk; Sickmann, Jan; Sturm, Sebastian; Vogel, Karin; Wolf, Daniel

2013-06-11

483

Polarization holography for vortex retarders recording.  

PubMed

We present an original static recording method for vortex retarders (VRs) made from liquid crystal polymers (LCPs) using the superimposition of several polarized beams. VRs are birefringent plates characterized by a rotation of their fast axis about their center. The new method is based on polarization holography and photo-orientable LCP. Combining several polarized beams induces the polarization patterns required for the recording process of VRs without mechanical action. A mathematical description of the method, the outcomes of the numerical simulations, and the first experimental results are presented. PMID:24085221

Piron, Pierre; Blain, Pascal; Habraken, Serge; Mawet, Dimitri

2013-10-01

484

Vertical-bandwidth-limited digital holography.  

PubMed

Optical scanning holography (OSH) is a promising technique to acquire a big-size digital hologram. However, the acquisition speed is limited by the mechanical scanner. In this Letter we apply the OSH in conjunction with an anisotropic low-pass filtering pupil to acquire vertical-bandwidth-limited (VBL) holograms. The size and the acquisition time of the VBL hologram can be reduced by one order of magnitude while the horizontal resolution remains the same as the conventional scanning hologram. The VBL hologram can be coded as an off-axis hologram without any postfiltering. Meanwhile, the full horizontal bandwidth of the displaying device can be capitalized. PMID:22743459

Liu, Jung-Ping; Lee, Chieh-Cheng; Lo, Ying-Hau; Luo, Dao-Zheng

2012-07-01

485

"Kunstwerk" in the age of holography  

NASA Astrophysics Data System (ADS)

In 2007 one auction shocked collectors and artists: Two art works of Rudie Berkhout were offered for one thousand dollars on eBay. The closing down of museums for holography in Cologne, New York and Washington DC paid a big price of respect for true art. Benjamin's vision about "Art in the Age of Mechanical Reproduction" found a new expression in abuse and ignorance. Beautiful sculptures of Art are reduced to "Holograms" like Rudie's "Cairo Aspect" placed in a rummage sale, covered by fingerprints of ignorance.

Öhlmann, Dietmar; Meulien Ohlmann, Odile

2013-02-01

486

X-ray holography of biological specimens  

SciTech Connect

The author reviews the reasons for x-ray imaging of biological specimens and the techniques presently being used for x-ray microscopy. The author points out the advantages of x-ray holography and the difficulties of obtaining the requisite coherence with conventional sources. The author discusses the problems of radiation damage and the remarkable fact that short pulse x-ray sources circumvent these problems and obtain high-resolution images of specimens in the living state. Finally, the author reviews some of the efforts underway to develop high-intensity coherent x-ray sources for the laboratory. 14 references, 5 figures, 2 tables.

Solem, J.C.

1984-01-01

487

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.

488

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.

489

Computer science and technology: overview of computer security certification and accreditation  

Microsoft Academic Search

This overview is primarily intended for use by ADP policy managers and information resource managers to become familiar with the approach to computer security certification and accreditation found in Guideline for Computer Security Certification and Accreditation, FIPS PUB 102. ADP technical managers and staff will also find it a useful overview. This overview summarizes how to establish and carry out

Z. G. Ruthberg; W. Neugent

1984-01-01

490

Light-Front Holography and Novel Effects in QCD  

SciTech Connect

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

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

2009-04-20

491

Growth of computing technology for education in India  

Microsoft Academic Search

Education and expansion of education have been the main task of any society. Owing to its heterogeneity and pressure from\\u000a a population of over one billion, India needs more rigorous attempts to elevate its education status; though some of its parts\\u000a are well socially developed. Further, with the deployments of computers in the educational institutions and infrastructural\\u000a developments to meet

Rakesh Mohan Bhatt

2004-01-01

492

Human-computer Interaction Technology in Virtual Operating Training System  

Microsoft Academic Search

(Abstract)To improve the feeling of immersion in the virtual reality operation system of some type missile, this paper proposes the human-computer interaction environments based on data-glove and orientation tracker. It discusses the structure and the principle of this system, presents the geometry modeling of virtual hand with reference to the structure and movement property of the hand, and adopts the

ZHANG Yu-xiang; SHA Han

493

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

494

Software Component Technology for High Performance Parallel and Grid Computing  

Microsoft Academic Search

A software component framework is one where an application designer programs by composing well understood and tested “components”e\\u000a rather than writing large volumes of not-very-reusable code. The software industry has been using component technology to\\u000a build desktop applications for about ten years now. More recently this idea has been extended to application in distributed\\u000a systems with frameworks like the Corba

Dennis Gannon

2001-01-01

495

The Human Computer Interaction Technology Based on Virtual Scene  

Microsoft Academic Search

\\u000a Assembly simulation technology which is based on virtual reality can benefit a lot to the optimization of product design as\\u000a well as the training and coaching of workers. At present, the effect of common assembly simulation is not very good, because\\u000a it only pays attention on the process of assembly and ignores the environment, and it is not interactive just

Huimeng Tan; Wenhua Zhu; Tianpeng Wang

2010-01-01

496

Backscatter digital holography of microparticles.  

PubMed

This work investigates a method for digital holographic imaging of microparticles. Traditional digital holographic techniques use a particle's forward scattered light to form the hologram, whereas here we use the backscattered light. Images of a particle are then computationally reconstructed from the backscatter hologram, and several examples of such reconstructions are presented. A potential advantage of this technique is that the backscatter holograms may be more sensitive to particle-surface details. PMID:23736480

Subedi, Nava R; Fowler, Nicholas B; Berg, Matthew J

2013-05-20

497

Phase determination method in statistical generalized phase-shifting digital holography.  

PubMed

A simple estimation method of the relative phase shift for generalized phase-shifting digital holography based on a statistical method is proposed. This method consists of a selection procedure of an optimum cost function and a simple root-finding procedure. The value and sign of the relative phase shift are determined using the coefficient and the solution of the optimum cost function. The complex field of an object wave is obtained using the estimated relative phase shift. The proposed method lifts the typical restriction on the range of the phase shift due to the phase ambiguity problem. Computer simulations and optical experiments are performed to verify the proposed method. PMID:23518741

Yoshikawa, Nobukazu

2013-03-20

498

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

PubMed

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

2009-06-20

499

Coupling High Resolution Earth System Models Using Advanced Computational Technologies  

Microsoft Academic Search

Abstract—The,NASA\\/GSFC Land Information System (LIS) has,now,been,successfully coupled,to the Weather,Research and Forecasting (WRF) and Goddard,Cumulus,Ensemble,(GCE) models,using parallel techniques,in a manner,compliant,with the Earth System Modeling Framework,(ESMF). LIS is a high- performance Land Data Assimilation System (LDAS), developed under funding from ESTO-CT’s Round-3 CAN, whose TRL3 technologies,have,been,advanced,to TRL4 the current,ESTO- AIST project. The original LIS consists of several land,sur- face models,run,in an uncoupled,manner,(i.e.

Christa Peters-Lidard; Sujay Kumar; Wei-Kuo Tao; Joseph Eastman; Xiping Zeng; Steve Lang; Paul Houser

500

Continuous-wave terahertz in-line digital holography.  

PubMed

A terahertz (THz) in-line digital holography project has been proposed based on a CO2 pumped 2.52 THz continuous-wave laser and a pyroelectric-array camera used as the detector. The THz Gabor in-line digital holograms have been obtained and then the high resolution reconstruction of THz in-line digital holography was realized. The resolution of an in-line digital holography system has been tested by the use of a series of objects. High-quality and high-resolution reconstructed images have been obtained, and the real lateral resolution is higher than 0.2 mm. It can be inferred from the results that the THz Gabor in-line digital holography system has the abilities of real-time and high-resolution imaging. PMID:22859141

Xue, Kai; Li, Qi; Li, Yun-Da; Wang, Qi

2012-08-01