Use of personal computer technology in supporting a radiological review workstation

1994 ◽  
Author(s):  
Mohan R. Ramaswamy ◽  
David A. Avrin ◽  
Katherine P. Andriole ◽  
Albert W. K. Wong ◽  
Todd M. Bazzill ◽  
...  
Keyword(s):  
Personal Computer ◽  
Computer Technology

Curb Cuts and Computers: Advocating for Design Equality in the 1980s

Design Issues ◽  
2019 ◽  
Vol 35 (4) ◽  
pp. 23-32
Author(s):  
Elizabeth Petrick
Keyword(s):  
Personal Computer ◽  
Computer Technology ◽  
Personal Computers ◽  
Computer User ◽  
History Of

This article concerns the history of the curb cut metaphor as applied to personal computer technology in the 1980s. Disability advocates used the metaphor to argue the necessity for accessibility features on computers to enable greater access. To accomplish this goal, these advocates utilized a complex comparison between personal computers and sidewalk ramps to combat assumptions about who the intended computer user was and to argue for how people with different abilities could operate the same technology.

scholarly journals Application of Johnson distributions to describe noise in the problem of information protection from leakage due to the side electromagnetic fields of the USB keyboard

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
A. S. Chechko ◽  
Keyword(s):  
Electromagnetic Fields ◽  
Personal Computer ◽  
Computer Technology ◽  
Random Processes ◽  
The Other ◽  
Information Protection ◽  
Complete Protection ◽  
Negative Effects ◽  
Useful Signal ◽  
The One

The problem of the description of artificially present industrial noises which are available at operation of personal computers is considered in work. These noises have both positive and negative effects when protecting the information typed by the user by means of the USB keyboard interface. The difficulties that arise in this case are due to the fact that the indirect radiation of electromagnetic fields is observed during the operation of all elements of computer technology. On the one hand, the presence of these noises distorts the useful signal, which in turn prevents the attacker from detecting reliable information that is transmitted. On the other hand, these noises prevent the creation of appropriate measures to ensure complete protection when typing by a user of a personal computer. The paper proposes to consider industrial noise in the form of three random processes, which are described by Johnson distributions.

The Effect of Home Computer Use on Jordanian Children: A Parental Perspective

2008 ◽  
Vol 39 (3) ◽  
pp. 267-284 ◽  
Author(s):  
Omar M. Khasawneh ◽  
Hamed M. Al-Awidi
Keyword(s):  
Personal Computer ◽  
Computer Technology ◽  
Computer Use ◽  
Digital Games ◽  
Behavior Changes ◽  
Home Computer ◽  
Children's Behavior ◽  
E Mail

The purpose of this study is to examine the effects of computer technology on Jordanian children from the perspectives of their parents. The sample of the study consisted of 127 participants. Each participant is a parent of a child or children who owned a personal computer. Our findings revealed some of the positive as well as negative changes that have been manifested as a result of using computers. The study showed that children's behavior changes as a result of computer use. For example, children became less active as they spend time on the computer and less time devoted to exercising and playing. The most essential finding of this study was that a large number of parents reported that their children familiarized themselves with computer functions and parts and technological and computer concepts, such as chatting, e-mail, and digital games.

Nuclear medicine imaging workstations based on personal computer technology

1990 ◽  
Vol 20 (3) ◽  
pp. 234-241
Author(s):  
Stewart M. Spies ◽  
William G. Spies ◽  
Edward A. Silverstein ◽  
A. Michael Zimmer
Keyword(s):  
Nuclear Medicine ◽  
Personal Computer ◽  
Computer Technology ◽  
Nuclear Medicine Imaging

Design of objective lens for 200-kV high-resolution electron microscopes

1983 ◽  
Vol 41 ◽  
pp. 314-315
Author(s):  
K. Tsuno ◽  
T. Honda ◽  
Y. Harada ◽  
M. Naruse
Keyword(s):  
Optical Properties ◽  
Computer Technology ◽  
Axial Magnetic Field ◽  
Chromatic Aberration ◽  
Objective Lens ◽  
Resolution Electron ◽  
Correction Of Astigmatism ◽  
Three Stages ◽  
Electron Microscopes ◽  
Stage 1

Developement of computer technology provides much improvements on electron microscopy, such as simulation of images, reconstruction of images and automatic controll of microscopes (auto-focussing and auto-correction of astigmatism) and design of electron microscope lenses by using a finite element method (FEM). In this investigation, procedures for simulating the optical properties of objective lenses of HREM and the characteristics of the new lens for HREM at 200 kV are described.The process for designing the objective lens is divided into three stages. Stage 1 is the process for estimating the optical properties of the lens. Firstly, calculation by FEM is made for simulating the axial magnetic field distributions Bzc of the lens. Secondly, electron ray trajectory is numerically calculated by using Bzc. And lastly, using Bzc and ray trajectory, spherical and chromatic aberration coefficients Cs and Cc are numerically calculated. Above calculations are repeated by changing the shape of lens until! to find an optimum aberration coefficients.

Quantitative parallel EELS spectrum imaging developed as a new tool in AEM

1992 ◽  
Vol 50 (2) ◽  
pp. 1202-1203
Author(s):  
Gianluigi Botton ◽  
Gilles L'espérance
Keyword(s):  
Statistical Analysis ◽  
Spatial Resolution ◽  
Personal Computer ◽  
Systematic Study ◽  
Present Author ◽  
Chemical Elements ◽  
Detection Limits ◽  
Research Groups ◽  
Quantitative Performance ◽  
Spectrum Imaging

As interest for parallel EELS spectrum imaging grows in laboratories equipped with commercial spectrometers, different approaches were used in recent years by a few research groups in the development of the technique of spectrum imaging as reported in the literature. Either by controlling, with a personal computer both the microsope and the spectrometer or using more powerful workstations interfaced to conventional multichannel analysers with commercially available programs to control the microscope and the spectrometer, spectrum images can now be obtained. Work on the limits of the technique, in terms of the quantitative performance was reported, however, by the present author where a systematic study of artifacts detection limits, statistical errors as a function of desired spatial resolution and range of chemical elements to be studied in a map was carried out The aim of the present paper is to show an application of quantitative parallel EELS spectrum imaging where statistical analysis is performed at each pixel and interpretation is carried out using criteria established from the statistical analysis and variations in composition are analyzed with the help of information retreived from t/γ maps so that artifacts are avoided.

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