Effects of Rotation Patterns on Tread Life Evaluation

1973 ◽  
Vol 1 (4) ◽  
pp. 349-353
Author(s):  
F. C. Brenner ◽  
A. Kondo
Keyword(s):  
The Other ◽  
Life Evaluation ◽  
Effects Of Rotation ◽  
Life Evaluations

Abstract The effects of making tread life evaluations using different patterns of rotation are reported. It is shown that the estimated average tread life for a tire was not statistically different in experiments with four tires in fixed wheel position, on fixed axles, or fully rotated to all wheel positions. The fully rotated procedure produced the same average for a pair of tires or for four tires; the variability of the data was significantly smaller than in the other rotation patterns.

Isotope effects in the transfer of vibrational energy in gaseous collisions

1963 ◽  
Vol 272 (1351) ◽  
pp. 481-489 ◽  
Keyword(s):  
Energy Transfer ◽  
Vibrational Energy ◽  
Isotope Effects ◽  
Methyl Chloride ◽  
Steric Factor ◽  
The Other ◽  
Accurate Information ◽  
Effects Of Rotation ◽  
Catalytic Effects ◽  
Good Agreement

Previously available studies of isotope effects in catalysts for the transfer of vibrational energy have been extended by comparing catalytic effects of NH 3 and ND 3 . For each of the three vibrators, ethylene, methyl chloride, and cyclo propane, vibration-vibration transfer appears to be only of subsidiary importance in the overall catalysis observed. With these vibrators, good agreement is found between observed relative efficiencies of H 2 O and D 2 O, and H 3 N and D 3 N as energy transfer catalysts. With ethylene, relative efficiencies of H 3 N and D 3 N can probably be attributed to mass differences. But even after allowing for mass differences of the isotopic molecules, collisions with some of the other vibrators show residual predominance of the hydrogen over the deuterium derivative as catalyst. This can possibly be attributed to effects of rotation during a collision, on the steric factor. To advance our knowledge about energy transfer further, more accurate information is needed about the origin and magnitude of inter-molecular repulsions.

scholarly journals Hydrodynamic forces acting on a cylinder in motion, and the idea of a "hydrodynamic centre."

1929 ◽  
Vol 124 (794) ◽  
pp. 296-303 ◽  
Keyword(s):  
General Theory ◽  
General Result ◽  
Complex Variable ◽  
Velocity Potential ◽  
Fluid Motion ◽  
Rotating Cylinder ◽  
The Other ◽  
Two Dimensional ◽  
Effects Of Rotation ◽  
Surrounding Liquid

There are two general methods of determining the forces acting on a cylinder due to the two-dimensional motion of a surrounding liquid. One is applicable to the case of a stationary cylinder in a stream, in the form X - Y = 1/2 p ∫( dw / dz ) 2 dz . (1.1) M = -1/2 pR ∫( dw / dz ) 2 z . dz (1.2) where X and Y are the components of the resultant force, parallel to the x and y axes, and M is its moment about tbs origin; p is the density of the fluid, and w is the velocity potential-stream-function for the fluid motion; z is as usual the complex variable x + y . The other is that obtained from the general theory of the "impulse. The first of these is unable to deal with a rotating cylinder, and the second is unable to include "circulation." In the course of an investigation of the effects of rotation upon the circulation round, and the forces acting upon, a Joukowski aerofoil, to which problem neither method applies, since the combined effect of rotation and circulation is needed, a quite general result was obtained, which it is thought worth while to publish separately.

What should be the goal of public policies?

2020 ◽  
Vol 4 (2) ◽  
pp. 226-235 ◽  
Author(s):  
MARTINE DURAND
Keyword(s):  
Subjective Wellbeing ◽  
Oecd Countries ◽  
Future Generations ◽  
Emotional Experiences ◽  
Single Measure ◽  
Life Evaluation ◽  
Policy Cycles ◽  
Sole Criterion ◽  
Automatic Pilot ◽  
Life Evaluations

AbstractShould subjective wellbeing, as measured by life evaluation, be the sole criterion for policies? This article answers this question negatively based on three arguments. First, it is important to distinguish between people's life evaluations, their emotional experiences and their sense of purpose; each has different drivers and consequences, implying that no single measure can adequately subsume the others. Second, while subjective wellbeing provides information missed by more conventional measures, the reverse is also true. This implies that information on the intrinsic importance of other key wellbeing dimensions cannot be derived from just looking at their instrumental value in raising subjective wellbeing. Third, the ‘utilitarian calculus’ implicit in subjective wellbeing regressions shines little light on normative decisions such as the attention we should focus on the worst off or on future generations. In contrast to the ‘automatic pilot’ approach to policies advocated by Frijters et al., this article favours an approach based on dashboards of indicators used to inform all of the stages of the policy cycles, as recently implemented by several OECD countries.

Stromatoporoids from the Famennian (Devonian) Wabamun Formation, Normandville oilfield, north–central Alberta, Canada

1988 ◽  
Vol 62 (03) ◽  
pp. 411-419 ◽  
Author(s):  
Colin W. Stearn
Keyword(s):  
Patch Reef ◽  
Abundant Species ◽  
The Other ◽  
North Central ◽  
Biotic Crisis

Stromatoporoids are the principal framebuilding organisms in the patch reef that is part of the reservoir of the Normandville field. The reef is 10 m thick and 1.5 km2in area and demonstrates that stromatoporoids retained their ability to build reefal edifices into Famennian time despite the biotic crisis at the close of Frasnian time. The fauna is dominated by labechiids but includes three non-labechiid species. The most abundant species isStylostroma sinense(Dong) butLabechia palliseriStearn is also common. Both these species are highly variable and are described in terms of multiple phases that occur in a single skeleton. The other species described areClathrostromacf.C. jukkenseYavorsky,Gerronostromasp. (a columnar species), andStromatoporasp. The fauna belongs in Famennian/Strunian assemblage 2 as defined by Stearn et al. (1988).

D. The Line Spectrum of Pulsating Variable Stars

1967 ◽  
Vol 28 ◽  
pp. 207-244
Author(s):  
R. P. Kraft
Keyword(s):  
Variable Stars ◽  
The Other ◽  
Line Spectrum ◽  
Afternoon Session ◽  
Empirical Information ◽  
Pulsating Variable Stars ◽  
Almost Continuous ◽  
Informal Approach

(Ed. note:Encouraged by the success of the more informal approach in Christy's presentation, we tried an even more extreme experiment in this session, I-D. In essence, Kraft held the floor continuously all morning, and for the hour and a half afternoon session, serving as a combined Summary-Introductory speaker and a marathon-moderator of a running discussion on the line spectrum of cepheids. There was almost continuous interruption of his presentation; and most points raised from the floor were followed through in detail, no matter how digressive to the main presentation. This approach turned out to be much too extreme. It is wearing on the speaker, and the other members of the symposium feel more like an audience and less like participants in a dissective discussion. Because Kraft presented a compendious collection of empirical information, and, based on it, an exceedingly novel series of suggestions on the cepheid problem, these defects were probably aggravated by the first and alleviated by the second. I am much indebted to Kraft for working with me on a preliminary editing, to try to delete the side-excursions and to retain coherence about the main points. As usual, however, all responsibility for defects in final editing is wholly my own.)

C. The Continuous Spectrum of Pulsating Variable Stars

1967 ◽  
Vol 28 ◽  
pp. 177-206
Author(s):  
J. B. Oke ◽  
C. A. Whitney
Keyword(s):  
Continuous Spectrum ◽  
Variable Stars ◽  
Velocity Fields ◽  
The Other ◽  
Line Spectrum ◽  
Direct Information ◽  
Thermodynamic Structure ◽  
Diagnostic Interpretation ◽  
Pulsating Variable Stars ◽  
The Continuum

Pecker:The topic to be considered today is the continuous spectrum of certain stars, whose variability we attribute to a pulsation of some part of their structure. Obviously, this continuous spectrum provides a test of the pulsation theory to the extent that the continuum is completely and accurately observed and that we can analyse it to infer the structure of the star producing it. The continuum is one of the two possible spectral observations; the other is the line spectrum. It is obvious that from studies of the continuum alone, we obtain no direct information on the velocity fields in the star. We obtain information only on the thermodynamic structure of the photospheric layers of these stars–the photospheric layers being defined as those from which the observed continuum directly arises. So the problems arising in a study of the continuum are of two general kinds: completeness of observation, and adequacy of diagnostic interpretation. I will make a few comments on these, then turn the meeting over to Oke and Whitney.

Observing programme for the 24-inch/36-inch Schmidt telescope

1966 ◽  
Vol 24 ◽  
pp. 337
Author(s):  
W. Iwanowska
Keyword(s):  
The Other ◽  
Schmidt Telescope ◽  
Flint Glass

A new 24-inch/36-inch//3 Schmidt telescope, made by C. Zeiss, Jena, has been installed since 30 August 1962, at the N. Copernicus University Observatory in Toruń. It is equipped with two objective prisms, used separately, one of crown the other of flint glass, each of 5° refracting angle, giving dispersions of 560Å/mm and 250Å/ mm respectively.

A hard choice for Tomasello

2020 ◽  
Vol 43 ◽  
Author(s):  
Philip Pettit
Keyword(s):  
Joint Action ◽  
The Other ◽  
Hard Choice ◽  
Margaret Gilbert ◽  
Michael Bratman ◽  
Human Sense ◽  
Sense Of Obligation

Abstract Michael Tomasello explains the human sense of obligation by the role it plays in negotiating practices of acting jointly and the commitments they underwrite. He draws in his work on two models of joint action, one from Michael Bratman, the other from Margaret Gilbert. But Bratman's makes the explanation too difficult to succeed, and Gilbert's makes it too easy.

A study of cometary eruptions through OH radio-lines

1999 ◽  
Vol 173 ◽  
pp. 249-254
Author(s):  
A.M. Silva ◽  
R.D. Miró
Keyword(s):  
Short Duration ◽  
Growth Curves ◽  
The Other ◽  
Initial Mass ◽  
Radio Lines ◽  
Other Hand ◽  
Sudden Rise

AbstractWe have developed a model for theH2OandOHevolution in a comet outburst, assuming that together with the gas, a distribution of icy grains is ejected. With an initial mass of icy grains of 108kg released, theH2OandOHproductions are increased up to a factor two, and the growth curves change drastically in the first two days. The model is applied to eruptions detected in theOHradio monitorings and fits well with the slow variations in the flux. On the other hand, several events of short duration appear, consisting of a sudden rise ofOHflux, followed by a sudden decay on the second day. These apparent short bursts are frequently found as precursors of a more durable eruption. We suggest that both of them are part of a unique eruption, and that the sudden decay is due to collisions that de-excite theOHmaser, when it reaches the Cometopause region located at 1.35 × 105kmfrom the nucleus.

Note on Selection of Coordinate Systems for Geodynamics

1975 ◽  
Vol 26 ◽  
pp. 395-407
Author(s):  
S. Henriksen
Keyword(s):  
Sea Level ◽  
The Other ◽  
Coordinate Systems ◽  
Mean Sea Level ◽  
The Earth ◽  
The One ◽  
Static Systems ◽  
Selection Of

The first question to be answered, in seeking coordinate systems for geodynamics, is: what is geodynamics? The answer is, of course, that geodynamics is that part of geophysics which is concerned with movements of the Earth, as opposed to geostatics which is the physics of the stationary Earth. But as far as we know, there is no stationary Earth – epur sic monere. So geodynamics is actually coextensive with geophysics, and coordinate systems suitable for the one should be suitable for the other. At the present time, there are not many coordinate systems, if any, that can be identified with a static Earth. Certainly the only coordinate of aeronomic (atmospheric) interest is the height, and this is usually either as geodynamic height or as pressure. In oceanology, the most important coordinate is depth, and this, like heights in the atmosphere, is expressed as metric depth from mean sea level, as geodynamic depth, or as pressure. Only for the earth do we find “static” systems in use, ana even here there is real question as to whether the systems are dynamic or static. So it would seem that our answer to the question, of what kind, of coordinate systems are we seeking, must be that we are looking for the same systems as are used in geophysics, and these systems are dynamic in nature already – that is, their definition involvestime.

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