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.

The Lakefront Today

2021 ◽  
pp. 281-298
Author(s):  
Joseph D. Kearney ◽  
Thomas W. Merrill
Keyword(s):  
Public Trust ◽  
The Political ◽  
Boundary Line ◽  
Deep Tunnel ◽  
The South ◽  
The Public ◽  
The Past ◽  
Public Trust Doctrine ◽  
The Future ◽  
Recent Developments

This chapter reviews how the political settlements and legal understandings canvassed in the account continue to affect the Chicago lakefront today. It offers brief snapshots of five more recent developments on the lakefront that reflect the influence of the past — and that may be indicative of the future. The chapter begins by recounting the boundary-line agreement of 1912 which planted the seeds of the Illinois Central's demise on the lakefront. Today, the railroad has largely disappeared from the lakefront, in both name and fact. The chapter then shifts to discuss the Ward cases, which continue to affect the shape of the lakefront. It chronicles the success of Millennium Park and the Illinois Supreme Court's demotion of the public dedication doctrine to a statutory right limited to Grant Park. The chapter also recounts the Deep Tunnel project and the challenges in the South Works site. Ultimately, it discusses the appearance of the public trust doctrine on the lakefront, being invoked by preservationist groups to challenge both a new museum and the construction of President Barack Obama's presidential library (called the Obama Presidential Center).

RECENT DEVELOPMENTS IN LABORATORY ORIENTATION OF CORES BY THEIR MAGNETIC POLARITY

Geophysics ◽  
1938 ◽  
Vol 3 (2) ◽  
pp. 122-129 ◽  
Author(s):  
Edward D. Lynton
Keyword(s):  
Experimental Work ◽  
Magnetic Polarity ◽  
Heavy Mineral ◽  
Human Errors ◽  
Recording Apparatus ◽  
The Past ◽  
Recent Developments

During the past year further experimental work has increased the applicability of this method of orienting well cores by their magnetic polarity so that definite results now total approximately 60% of all cores tested, the presence or lack of heavy mineral grains being the depending factor. The most important developments have been, first, the elimination of human errors by making the recording apparatus entirely automatic and foolproof; second, the introduction of automatic and combined forward and reverse runs on cores, which enables the operator to distinguish definitely between polarized mineral grains and material with susceptibility only.

scholarly journals Sekularingseringstesen i religionssociologien

1999 ◽  
Author(s):  
Lene Kühle
Keyword(s):  
Social Reality ◽  
Sociology Of Religion ◽  
Main Argument ◽  
New Paradigm ◽  
Sociological Study ◽  
Political Sphere ◽  
The Past ◽  
The Future ◽  
Recent Developments ◽  
Dominant Paradigm

Secularization has been á major issue in sociological debates on religion. Recent developments in theory as well as in social reality seems to indicate that the future for the seularization thesis will not be as glorious as the past. The main argument in this article is that the secularization thesis, which can more properly be understood as a paradigm in the Kuhnian sense, is no longer a very useful frame for the sociological study of religion. This argument is supported by three examples from the contemporay political sphere, where the description in terms of "secularization" seems to lead to ambiguous conclusions. The article gives a brief presentation of two candidates for a new paradigm and discusses the requirements that the new paradigm is expected to meet. Whether any of these paradigms or perhaps a completely different one is going to assume the position as the dominant paradigm in the sociology of religion is still to be seen.

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.

scholarly journals Recent Developments in Corporate Taxation

1987 ◽  
Vol 26 (1) ◽  
pp. 120
Author(s):  
Donald H. Watkins
Keyword(s):  
Income Tax ◽  
Petroleum Industry ◽  
Corporate Taxation ◽  
The Past ◽  
The Future ◽  
Recent Developments

A large number of amendments to the Income Tax Act (Canada) have been made or proposed during the past year, many of which affect how corporations will conduct acquisitions and mergers in the future. The paper reviews certain of those amendments which will affect corporations engaged in the petroleum industry.

scholarly journals Mechanisms of Europeanisation and Compliance in Judicial Politics: Understanding the Past and Anticipating the Future

2013 ◽  
Vol 1 (1) ◽  
pp. 57-72 ◽  
Author(s):  
Ramona Coman
Keyword(s):  
European Union ◽  
Judicial Politics ◽  
Economic Policies ◽  
The European Union ◽  
Policy Area ◽  
Transformative Power ◽  
The Past ◽  
The Future ◽  
Recent Developments

Abstract Recent developments in Hungarian constitutional and judicial politics have given impetus to question not only the outcomes of democratisation and Europeanisation, but also the efficacy of the European Union’s compliance mechanisms. In 2010, Hungary, one of the forerunners in building democracy made the headlines with Fidesz’s attempts at adopting a new Constitution and implementing cardinal laws along with controversial institutional, cultural, religious, moral and socio-economic policies. This article attempts to depict the transformative power of the European Union within a sensitive policy area which touches upon States’ pouvoris régaliens: the independence of the judiciary.

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.

Influence of Turbocharger Bearing Design on Observed Linear and Nonlinear Vibration

2010 ◽  
Author(s):  
R. Gordon Kirk ◽  
Brian Mondschein ◽  
Ali A. Alsaeed ◽  
Daniel Gallimore ◽  
Andy Frank ◽  
...  
Keyword(s):  
High Speed ◽  
Vibration Spectrum ◽  
Journal Bearings ◽  
Operating Condition ◽  
The Past ◽  
Custom Design ◽  
Recent Developments ◽  
Bearing Design ◽  
Unstable Vibration ◽  
Actual Response

Automotive turbochargers are known to have operation into the self-excited unstable vibration region. In the past these instabilities have been accepted as unavoidable, but recent developments in analysis and instrumentation may make it possible to reduce or eliminate them. A test stand has been developed at Virginia Tech to measure the vibrations of a 3.9 liter diesel engine stock turbocharger with both stock floating bushing journal bearings and also custom design fixed geometry bearings. Vibration spectrum content clearly identifies the shaft instabilities and provides the basis for additional evaluation of current and future improved bearing design modifications. The current results, for a series of custom fixed geometry journal bearings, show a shift in the frequencies of the two unstable modes for the no load operating condition. These results can be compared to the linear analysis predicted instability frequencies to better understand the actual response of the high speed turbocharger. This paper documents the spectrum content for three different bearing designs and compares the results to a stock floating bush journal bearing result for the same no load operating condition.

Sign in / Sign up

Export Citation Format

Share Document