Problems and solutions applying high speed fuses in the past and the future

2002 ◽  
Author(s):  
N.C. Andersen
Keyword(s):  
High Speed ◽  
The Past ◽  
The Future ◽  
Problems And Solutions

The Past of the Future of Computation

2018 ◽  
Author(s):  
James A. Anderson
Keyword(s):  
Artificial Intelligence ◽  
High Speed ◽  
The Other ◽  
Cognitive Tasks ◽  
Cognitive Tool ◽  
The Past ◽  
The World ◽  
The Future ◽  
Simple Step ◽  
A Current

Hand axes, language, and computers are tools that increase our ability to deal with the world. Computing is a cognitive tool and comes in several kinds: digital, analog, and brain-like. An analog telephone connects two telephones with a wire. Talking causes a current to flow on the wire. In a digital telephone the voltage is converted into groups of ones or zeros and sent at high speed from one telephone to the other. An analog telephone requires one simple step. A digital telephone requires several million discrete steps per second. Digital telephones work because the hardware has gotten much faster. Yet brains constructed of slow devices and using a few watts of power are competitive for many cognitive tasks. The important question is not why machines are becoming so smart but why humans are still so good. Artificial intelligence is missing something important probably based on hardware differences.

Some Low Speed Problems of High Speed Aircraft

1962 ◽  
Vol 66 (616) ◽  
pp. 211-225 ◽  
Author(s):  
A. Spence ◽  
D. Lean
Keyword(s):  
Mach Number ◽  
High Speed ◽  
Supersonic Speed ◽  
Jet Propulsion ◽  
Low Speed ◽  
The Past ◽  
Flight Range ◽  
The Future ◽  
Mach Numbers ◽  
Leading Edges

The high speed aircraft whose low speed aerodynamic problems are discussed in this part of the paper belong to the future rather than to the past or present. Küchemann has shown how jet propulsion and the use of a new set of aerodynamics appropriate to supersonic speed lead one from the classical aircraft to new shapes suitable for achieving a required flight range. These shapes include wing-body arrangements with wing sweepback angles of 55° or 60° suitable for a Mach number of about 1·2, and slender, neartriangular wings with sharp leading edges suitable for Mach numbers of around 2 or more, depending on the ratio of span to length.

Recent Developments in High Speed Research

1950 ◽  
Vol 54 (477) ◽  
pp. 545-586 ◽  
Author(s):  
J. A. Beavan ◽  
D. W. Holder
Keyword(s):  
Compressible Flow ◽  
Experimental Work ◽  
High Speed ◽  
The Past ◽  
The Future ◽  
Recent Developments ◽  
Lock In

Much work has been done on compressible flow since the contribution of the Aerodynamics Division to research in this field was last described to the Society by the late C. N. H. Lock in 1937. At that time he was able to review many of the data which were available from other sources, whereas today such a task would be impossible in a paper of this length. We shall confine ourselves here, therefore, to a description of some of the experimental work that has been done during the past few years in the high-speed laboratory of the Division, and to an account of the lines along which it is intended to continue the work in the future.

6. London’s megaproject ecology

2017 ◽  
pp. 103-126
Author(s):  
Andrew Davies
Keyword(s):  
High Speed ◽  
Project Networks ◽  
The Past ◽  
Line Extension ◽  
London 2012 ◽  
The Future ◽  
Project Organizations ◽  
Over Time

‘London’s megaproject ecology’ describes some of the infrastructure megaprojects recently undertaken in London to illustrate some of the different ways of organizing projects. These include the Jubilee Line extension, High-Speed 1, the new fifth terminal at Heathrow, the Crossrail project, and London 2012 Olympics. It is important to understand the context within which projects are initiated and unfold over time. It raises many questions that cannot be answered by project management’s traditional preoccupation with the ‘lonely project’, such as: How do individuals, teams, and organizations involved in projects learn from the past? How do they develop their knowledge and prepare for the future? Four broad categories of project organizing are identified: single-project organizations, project-based organizations, project networks, and project ecologies.

Open Science – The Great Equalizer: Decolonizing the tools, technologies, and results of science in the 21st century

2021 ◽  
Author(s):  
Caroline Coward
Keyword(s):  
High Speed ◽  
Journal Article ◽  
Open Science ◽  
Digital Repositories ◽  
The Past ◽  
The Future ◽  
Global Movement ◽  
History Of ◽  
Ease Of Access

<p>Open Science, as we commonly define it, has grown steadily over the past two to three decades, thanks to the proliferation of electronic data and information, as well as ease of access to computers with high speed Internet connectivity. What began as a mechanism to share the products of our scientific research has evolved into a global movement involving journal article manuscripts, source code, copyright, access, and intellectual property negotiations, digital repositories, cloud-based tools, and data in a variety of formats.<br><br>This presentation will briefly define Open Science, and enumerate and describe common elements of Open Science through a brief history of the movement. It will also touch on both triumphs and challenges faced by proponents, discuss the role of professional publishers, aggregators, and other traditional gatekeepers, and will propose scenarios for the future of the movement. Questions, anecdotes, vexations, and suggestions from attendees are welcomed at the end of the presentation, with the goal of generate deeper discussion around the future and sustainability of Open Science. </p>

The on-line use of histogram data for high-speed correction and alignment of electron microscope images

1984 ◽  
Vol 42 ◽  
pp. 556-557
Author(s):  
William Krakow
Keyword(s):  
Power Spectrum ◽  
High Speed ◽  
Direct Memory Access ◽  
Digital Television ◽  
Contrast Transfer Function ◽  
The Past ◽  
High Resolution Tem ◽  
On Line ◽  
Correction Of Astigmatism ◽  
The Fourier Transform

In the past few years on-line digital television frame store devices coupled to computers have been employed to attempt to measure the microscope parameters of defocus and astigmatism. The ultimate goal of such tasks is to fully adjust the operating parameters of the microscope and obtain an optimum image for viewing in terms of its information content. The initial approach to this problem, for high resolution TEM imaging, was to obtain the power spectrum from the Fourier transform of an image, find the contrast transfer function oscillation maxima, and subsequently correct the image. This technique requires a fast computer, a direct memory access device and even an array processor to accomplish these tasks on limited size arrays in a few seconds per image. It is not clear that the power spectrum could be used for more than defocus correction since the correction of astigmatism is a formidable problem of pattern recognition.

An atomic-resolution microscope study of Al contracts on GaAs

1986 ◽  
Vol 44 ◽  
pp. 726-727
Author(s):  
Z. Liliental-Weber ◽  
C. Nelson ◽  
R. Ludeke ◽  
R. Gronsky ◽  
J. Washburn
Keyword(s):  
High Speed ◽  
Schottky Contacts ◽  
Detailed Knowledge ◽  
The Past ◽  
Semiconductor Interfaces ◽  
Deposited Metal ◽  
Microwave Applications ◽  
Free Interfaces ◽  
Potential Use

The properties of metal/semiconductor interfaces have received considerable attention over the past few years, and the Al/GaAs system is of special interest because of its potential use in high-speed logic integrated optics, and microwave applications. For such materials a detailed knowledge of the geometric and electronic structure of the interface is fundamental to an understanding of the electrical properties of the contact. It is well known that the properties of Schottky contacts are established within a few atomic layers of the deposited metal. Therefore surface contamination can play a significant role. A method for fabricating contamination-free interfaces is absolutely necessary for reproducible properties, and molecularbeam epitaxy (MBE) offers such advantages for in-situ metal deposition under UHV conditions

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