Yorktown display architecture

1984 ◽  
Vol 42 ◽  
pp. 554-555
Author(s):  
Satish Gupta
Keyword(s):  
High Resolution ◽  
Computer Aided Design ◽  
Memory Systems ◽  
Display System ◽  
The Past ◽  
Wide Range ◽  
Raster Scan ◽  
Watson Research ◽  
High Resolution Images ◽  
Aided Design

The advances in VLSI and CRT technology over the past ten years have resulted in feasible implementations of raster-scan displays capable of displaying complex images with reasonably high resolutions. Single chips capable of storing 64 Kilobits can be used to build memory systems capable of storing such high resolution images. The ability to manipulate these high resolution images interactively requires the ability to change a large amount of information rather rapidly.At the IBM Thomas J. Watson Research Center, we have built a display system which addresses the problem of changing high resolution display images rapidly. The system was design to allow the rapid manipulating of images in wide range of applications. The applications planned include text formatting, computer aided design, and image processing applications which process digitized images.

Computer-aided design of molecular machines: Techniques, paradigms and difficulties

2021 ◽  
Author(s):  
Haohao Fu ◽  
Xueguang Shao ◽  
Wensheng Cai
Keyword(s):  
Computer Aided Design ◽  
Molecular Machines ◽  
The Past ◽  
Wide Range ◽  
Computer Aided ◽  
Aided Design

With the development in the past decade, molecular machines, which achieve specific tasks by responsing to external stilmuli, are gradually regarded as powerful tools for a wide range of applications,...

Three-fold astigmatism: An important TEM aberration

1993 ◽  
Vol 51 ◽  
pp. 972-973 ◽  
Author(s):  
O.L. Krivanek ◽  
M.L. Leber
Keyword(s):  
High Resolution ◽  
Spatial Frequency ◽  
Field Emission ◽  
Azimuthal Angle ◽  
Hollow Cone ◽  
Small Probe ◽  
Wide Range ◽  
High Resolution Images ◽  
Image Position

Three-fold astigmatism resembles regular astigmatism, but it has 3-fold rather than 2-fold symmetry. Its contribution to the aberration function χ(q) can be written as:where A3 is the coefficient of 3-fold astigmatism, λ is the electron wavelength, q is the spatial frequency, ϕ the azimuthal angle (ϕ = tan-1 (qy/qx)), and ϕ3 the direction of the astigmatism.Three-fold astigmatism is responsible for the “star of Mercedes” aberration figure that one obtains from intermediate lenses once their two-fold astigmatism has been corrected. Its effects have been observed when the beam is tilted in a hollow cone over a wide range of angles, and there is evidence for it in high resolution images of a small probe obtained in a field emission gun TEM/STEM instrument. It was also expected to be a major aberration in sextupole-based Cs correctors, and ways were being developed for dealing with it on Cs-corrected STEMs.

The Contribution of Phonon-Scattered Electrons to High-Resolution Electron Micrographs of Crystals

1990 ◽  
Vol 48 (1) ◽  
pp. 62-63
Author(s):  
H. Kohl
Keyword(s):  
High Resolution ◽  
Spherical Aberration ◽  
High Resolution Electron Microscopy ◽  
Static Potential ◽  
Qualitative Comparison ◽  
The Past ◽  
Resolution Electron ◽  
High Resolution Images ◽  
High Resolution Electron Micrographs ◽  
Extract Information

High-Resolution Electron Microscopy is able to determine structures of crystals and interfaces with a spatial resolution of somewhat less than 2 Å. As the image is strongly dependent on instrumental parameters, notably the defocus and the spherical aberration, the interpretation of micrographs necessitates a comparison with calculated images. Whereas one has often been content with a qualitative comparison of theory with experiment in the past, one is currently striving for quantitative procedures to extract information from the images [1,2]. For the calculations one starts by assuming a static potential, thus neglecting inelastic scattering processes.We shall confine the discussion to periodic specimens. All electrons, which have only been elastically scattered, are confined to very few directions, the Bragg spots. In-elastically scattered electrons, however, can be found in any direction. Therefore the influence of inelastic processes on the elastically (= Bragg) scattered electrons can be described as an attenuation [3]. For the calculation of high-resolution images this procedure would be correct only if we had an imaging energy filter capable of removing all phonon-scattered electrons. This is not realizable in practice. We are therefore forced to include the contribution of the phonon-scattered electrons.

Study on Application of CAD Used in Visual Advertising Design

2014 ◽  
Vol 571-572 ◽  
pp. 768-771
Author(s):  
Jun Liu
Keyword(s):  
Computer Aided Design ◽  
Television Advertising ◽  
Paper Study ◽  
Application Technology ◽  
Visual Effects ◽  
3D Technology ◽  
Wide Range ◽  
Computer Aided ◽  
Visual Impact ◽  
Aided Design

The 3D technology currently has in various engineering fields have a wide range of applications, all the 3D visual effects technology can bring us visual impact, the use of 3D technology produced by the television advertising more easily accepted by the audience, this paper study on the 3D computer-aided design advertising design application technology.

Towards Computer Aided Design and Analysis of Spatial Flexure Mechanisms

2016 ◽  
Author(s):  
Omer Anil Turkkan ◽  
Hai-Jun Su
Keyword(s):  
Computer Aided Design ◽  
Screw Theory ◽  
Design Tool ◽  
Future Design ◽  
Linear Elastic ◽  
Wide Range ◽  
Speed Up ◽  
System Equations ◽  
Compliance Matrices ◽  
Aided Design

Flexure mechanisms are the central part of numerous precision instruments and devices that are used in a wide range of science and engineering applications and currently, design of flexure mechanisms often heavily relies on designers’ previous hands-on experience. Therefore, a design tool that will speed up the design process is needed and this paper will introduce a systematic approach for building the necessary equations that are based on screw theory and linear elastic theory to analyze flexure mechanisms. A digital library of commonly used flexure elements must be available for a design tool and therefore, we first present the compliance matrices of commonly used flexure components. Motion twists and force wrenches of the screw theory can be related with these compliance matrices. Then, we introduce an algorithm that constructs the required linear system equations from individual compliance equations. This algorithm is applicable to flexure mechanisms with serial, parallel or hybrid chains. Finally, the algorithm is tested with a flexure mechanisms and it is shown that this approach can be the core of a future design tool.

Technology Education in the Middle Level School: Its Role and Purpose

1999 ◽  
Vol 83 (608) ◽  
pp. 34-44 ◽  
Author(s):  
Mark E. Sanders
Keyword(s):  
Technology Education ◽  
Computer Aided Design ◽  
World Wide ◽  
Magnetic Levitation ◽  
Education Technology ◽  
Middle Level ◽  
Digital Electronics ◽  
Flight Simulators ◽  
Wide Range ◽  
Aided Design

The curriculum and method of technology education remain one of the best-kept secrets in all education. Technology education engages students in a wide range of the very latest technologies: digital imaging, lasers, robotics, solar energy, World Wide Web development, magnetic levitation vehicles, analog and digital electronics, flight simulators, computer-aided design, and so forth.

Optimization of Heave Motions for a Four Column Semi-Submersible Based on Genetic Algorithm

2018 ◽  
Author(s):  
Suji Zhu
Keyword(s):  
Genetic Algorithm ◽  
Global Optimization ◽  
Computer Aided Design ◽  
Transfer Functions ◽  
Parametric Modelling ◽  
Optimal Solutions ◽  
Global Optimization Algorithm ◽  
The Past ◽  
Computer Aided ◽  
Aided Design

Semi-submersible is designed with low heave motions compared with conventional ships by utilizing the cancelation effects between pontoons and columns. During the past years, continuous efforts have been devoted to reducing the heave amplitudes considering utilizing dry-tree system. Different concepts of semi-submersible have been proposed with favorable heave response. Deep draft semi-submersibles have been proved to be efficient in reducing the heave motions, and the damper structures under the pontoon may also reduce the heave responses significantly. Those concepts are beyond the conventional semi-submersible design, which may bring high costs for fabrication and installations. During computer-aided design and analysis, optimization algorithms are used to search for the optimal hull configuration. However, due to the restrictions of computer capacities, the global optimization algorithm, in some cases, have difficulties in finding out the optimal solutions without the aid from engineering experience. In this paper, the geometry of a ring-pontoon four-column semi-submersible is generated by parametric modelling. The heave transfer functions at center of gravity are calculated using WADAM. Genetic algorithm is used to find the most favorable heave responses. In the end, the parameters that influence the heave motions are summarized and discussed.

scholarly journals Introduction to the Joint Commission Meeting on High Resolution Imaging from the Ground

1989 ◽  
Vol 8 ◽  
pp. 545-546
Author(s):  
John Davis
Keyword(s):  
High Resolution ◽  
Angular Resolution ◽  
High Angular Resolution ◽  
High Resolution Imaging ◽  
Wide Range ◽  
High Resolution Images ◽  
Resolution Imaging ◽  
Optical Wavelengths ◽  
To Come ◽  
Very High

As a result of advances in instrumentation and techniques, from radio through to optical wavelengths, we have before us the prospect of producing very high resolution images of a wide range of objects across this entire spectral range. This prospect, and the new knowledge and discoveries that may be anticipated from it, lie behind an upsurge in interest in high resolution imaging from the ground. Several new high angular resolution instruments for radio, infrared, and optical wavelengths are expected to come into operation before the 1991 IAU General Assembly.

Designing Technique Transfer of Dan Kwian Pottery Products

2018 ◽  
Vol 766 ◽  
pp. 40-43
Author(s):  
Chon Yeenang ◽  
Onlamee Kamon In
Keyword(s):  
Computer Aided Design ◽  
Skin Color ◽  
Research Method ◽  
Development Pattern ◽  
Participatory Action ◽  
The Past ◽  
Area 7 ◽  
Computer Aided ◽  
Aided Design ◽  
Cart Model

The development of Dan Kwian pottery products is a research that uses participatory action research methodology and qualitative research method. By selecting a specific sampling in area 7, Dan Chai Community, Dan Kwian District, Muang, Nakhon Ratchasima Province, Thailand. The objective of this research three reasons: 1) the study form and evolution of Dan Kwian pottery products. 2) the development of Dan Kwian pottery products to form individually. 3) To study the satisfaction of entrepreneurs and consumers towards Dan Kwian pottery products. The research found that the model of Dan Kwian pottery products in the past to convey the wisdom of the grandparents emphasize the usefulness rather than beauty. At present, the style of Dan Kwien pottery products has been designed in a popular fashion and computer aided design. The pottery have a variety of uses and beauty than in the past. The Dan kwian pottery product was development pattern to form a new identity. The five models was selected: two cat models, one peacock model, one owl model and one cart model to from fifty models. The researcher was introduced five new pottery products to assess the satisfaction of four entrepreneurs and thirty consumers. It was found that the pattern of the pottery is unique has average of entrepreneurs was 4.75, while the consumer has average of 4.13. The uniqueness of skin color has average of entrepreneurs was 4.75, while the consumer has average of 4.00. The beauty of the new pottery has average of entrepreneurs was 5.00, while the consumer has average 4.27. The useful for function of the pottery has average of entrepreneurs was 5.00, while the consumer has average of 4.70.

scholarly journals High Resolution Studies of Compact Binaries in Globular Clusters With HST and ROSAT

1996 ◽  
Vol 174 ◽  
pp. 171-180
Author(s):  
Jonathan E. Grindlay
Keyword(s):  
High Resolution ◽  
Globular Clusters ◽  
Cataclysmic Variables ◽  
Compact Binaries ◽  
Blue Stragglers ◽  
The Past ◽  
Dense Cores ◽  
Large Populations ◽  
High Resolution Images ◽  
Cluster Cores

The studies of compact binaries containing an accreting white dwarf or neutron star in the dense cores of globular clusters have made considerable progress in the past few years as a result of the high resolution images obtained with HST and ROSAT. It is now clear that cluster cores contain a significant population of these systems which must constrain the similarly large populations of millisecond pulsars as well as dynamical histories of clusters. The population of dim x-ray sources appears to be dominated by cataclysmic variables (CVs) formed by tidal capture and not exchange collisions. Our recent HST/FOS spectra of the first CVs in a cluster core, summarized here in more detail, suggest that cluster cores may contain a significant population of magnetic CVs. The required magnetic WDs may arise in spun-up cores of blue stragglers.

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