Determination of Relative Damping at Various Prestresses

1960 ◽  
Vol 33 (2) ◽  
pp. 282-301
Author(s):  
Th Kempermann ◽  
R. Clamroth
Keyword(s):  
Energy Loss ◽  
Phase Angle ◽  
Loss Factor ◽  
Short Review ◽  
The Other ◽  
Simple Function ◽  
History Of ◽  
Tan Δ ◽  
Special Case

Abstract After a short review of the history of the development of the concept of damping, the definitions—one in words, the other in the form of an equation—given in DIN 53513 are discussed, and their usefulness for measurements at various values of prestress is investigated. It is evident that the mathematical definition given in the Standard applies only in the special case when prestress and alternating stress are equal. For the complete range of prestress, the phase angle δ or some simple function of δ, such as the loss factor, tan δ, should be measured. If it is desired not to relinquish the percentage statement of the energy loss, then a new definition for the relative damping is proposed which is independent of the prestress, just as is tan δ. The dependence upon the prestress of the damping values under discussion is demonstrated in an experimental section, for various types of elastomers.

scholarly journals "Machina ludens". Rzeczywista i wyobrażona historia komputerów szachowych

Adeptus ◽  
2021 ◽  
Author(s):  
Piotr F. Piekutowski
Keyword(s):  
Artificial Intelligence ◽  
Drosophila Melanogaster ◽  
Computer Science ◽  
Paradigm Shift ◽  
Film History ◽  
The Other ◽  
The Real ◽  
Area Of Interest ◽  
History Of ◽  
Special Case

Machina Ludens: The Real and Imagined History of Chess ComputersThe essay offers a reading of the place of non-human machines in the game discourse, focusing on computer chess’s real as well as literary and film history. Chess, as the Drosophila melanogaster of artificial intelligence, a special case facilitating the study of the entire field, allows for going beyond the primary area of interest – computer science – and entering the realm of the text, where new languages of storytelling and new contexts present themselves. The paper discusses a multifaceted, posthumanist analysis of the game as a medium of non-anthropocentric and empowering narratives of the Other. It also sheds new light on the ongoing paradigm shift in human categories and human-technology relations. Machina ludens. Rzeczywista i wyobrażona historia komputerów szachowychCelem artykułu jest próba odczytania sposobu funkcjonowania nie-ludzkich maszyn w dyskursie growym, skupiona na rzeczywistej i literacko-filmowej historii komputerów szachowych. Szachy i sztuczna inteligencja wchodzą w przestrzeń tekstu, przekraczają pierwotny obszar zainteresowań – informatykę – i dzięki innym językom opowieści otwierają się na nowe konteksty. W tekście przedstawiono wieloaspektową, posthumanistyczną analizę gry jako medium nieantropocentrycznych i upodmiotawiających narracji Innego. Historia szachów i komputerów szachowych oraz ich tekstowe przedstawienia stanowią egzemplifikację zmian ludzkich kategorii oraz relacji człowiek-technologia.

Introduction to Christian Caucasian History II: States and Dynasties of the Formative Period

Traditio ◽  
1961 ◽  
Vol 17 ◽  
pp. 1-106 ◽  
Author(s):  
Cyril Toumanoff
Keyword(s):  
Formative Period ◽  
The Other ◽  
Self Determination ◽  
Historical Background ◽  
Self Sufficiency ◽  
Restricted Group ◽  
History Of ◽  
Group A

Part One of thisIntroductionwas concerned with the historical background of Caucasian Society; it dealt, accordingly, in some detail with the genesis and structure of that society, more particularly of its creative minority, the nobility, and in especial the spearhead of the nobility, the group of the dynastic princes. That study investigated also the ethos of this important and restricted group, a caste in fact, and its juridical status: the sovereign rights of the Princes, who were, under the presidency of kings, the real rulers of Caucasia; their internationally recognized position of minor kings; the ethno-political self-sufficiency and self-determination of their States, of which Armenia and to a large extent also the other Caucasian countries were little more than federative unions; the dependence of the Princes on other and greater monarchs; and the superadding of feudalistic features, resulting from this dependence, to the fundamentally dynasticist régime of Caucasia. Here, in the present study, it is proposed to consider this group in the concrete: to examine it, that is, as so many individual historical-genealogical-geographical (and often also ethnic) units. The preponderant role of the Caucasian dynastic aristocracy in the history of the formative centuries made, especially in Armenia, of this history, and of that of the following centuries as well, largely the history of these princely houses. This fully justifies our interest in this particular aspect of the Caucasian social development.

Nature, Freedom, History

2021 ◽  
pp. 258-283
Author(s):  
Brady Bowman
Keyword(s):  
Historical Development ◽  
Human Action ◽  
The Other ◽  
Self Determination ◽  
Human History ◽  
Organic Life ◽  
The World ◽  
History Of ◽  
The One

Post-Kantian philosophers historicize the world soul, reconceiving it as an implicitly rational, progressive, yet impersonal agency, at work throughout nature as a formative principle, more especially, however, in the progressive liberation and self-determination of spirit in human history. This chapter outlines the concept’s career in the thought of Kant, Maimon, Schelling, and Hegel, focusing especially on the overlapping functions they accord to the world soul. On the one side, it serves to mediate within nature between the opposing spheres of mechanism and organic life; on the other, between those of unconscious currents of historical development and self-consciously free human action. In thus tasking the world soul with mediating between nature and the history of human freedom, German idealists are faithful to their Platonic source of inspiration, even as they refashion the concept in a distinctively modern, post-Enlightenment spirit.

scholarly journals The Qibla Direction of the Great Mosque Inherited from the Islamic Kingdom in Java: Myth and Astronomy Perspective

ADDIN ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 109
Author(s):  
Fairuz Sabiq
Keyword(s):  
The Other ◽  
Left Hand ◽  
Right Hand ◽  
Other Hand ◽  
History Of ◽  
Right And Left Hand

The determination of the direction of the qibla at the Great Mosque that was inherited from the Islamic Kingdom of Java had executed by <em>waliyullah</em>. Through the folklore and history of the Land of Java or known as <em>a Babad</em>, those stories explained that <em>waliyullah</em> was the person who determining direction of Qibla by raising his right-hand and holding Masjidil Haram in Makkah. On the other hand, he was holding <em>mustoko</em> of the mosque. A line between his right and left-hand as a line of direction of the mosque’s Qibla. This kind of story was widespread in society as a myth. This myth was related to <em>karomah</em> (divine distinction) of <em>waliyullah</em>. Therefore, Qibla of the mosque could not be changeabled, eventhough, the qibla direction of Great Mosque is not unidirectional with direction of Masjidil Haram. People’s opinions said that Qibla direction of the mosque is right according to <em>jihatul Ka’bah</em>. This research is integrated with myth and astronomy. The results of this research are different from formerly perspectives. <em>Firstly</em>, <em>ulama</em> received the result of myth but they were not catching messages of the myth. <em>Ulama</em> were only understood of the explicit meanings of the myth but they were not understand of the implicit meanings of the myth. <em>Secondly</em>, Sunan Kalijaga had determined direction Qibla of the Mosque with his knowledge about <em>falak</em>, he was not doing it by only his <em>karomah </em>(divine distinction). <em>Thirdly</em>, the direction of the Qibla at the Great Mosque that was inherited from the Islamic Kingdom of Java was determined its Qibla direction by using ‘<em>ainul Ka’bah </em>method<em> </em>and not only by using <em>jihatul Ka’bah</em> method. The last, Java society has a feodalistic character.

The breed structure and genetic analysis of the pedigree Sahiwal breed in Australia

1978 ◽  
Vol 29 (2) ◽  
pp. 381 ◽  
Author(s):  
ND Herron
Keyword(s):  
Development Stage ◽  
Genetic History ◽  
Registration Data ◽  
Effective Generation ◽  
History Of ◽  
Four Levels ◽  
Relationship Of ◽  
Special Case

The breed structure and genetic history of the pedigree Sahiwal breed in Australia were analysed from registration data from the Society's Herd Book. It is stressed that the study is a special case—a new breed founded on 10 imported animals, numerically small, and still in its development stage. The breed structure was divided into four levels, with 10 imported animals at the top determining the genetic make-up of the breed. The genetic contribution of imported animals to the breed was 73.5%. Determination of the percentage direct relationship of important animals showed that several animals made a major contribution to the genotype of the breed. The maximum contribution of any one animal was 36.2%. Total inbreeding in 1974 was 21.2%. This comprised 5.6% current inbreeding, 8.3% long-term inbreeding and 7.3% strain inbreeding. The index of subdivision calculated from non-current and long-term inbreeding was 1.88, which indicated that there was little effective subdivision of the breed into separate strains. The effective generation length was 6 years. There was no selective registration of either sex.

Determination of the phase structure of polymerblends by electron microscopy

1978 ◽  
Vol 36 (1) ◽  
pp. 492-493
Author(s):  
Dr. G. Kaemof
Keyword(s):  
Screw Extruder ◽  
Electron Microscopic ◽  
Thin Sections ◽  
Single Screw Extruder ◽  
Transmission Electron ◽  
The Matrix ◽  
Twin Screw ◽  
Special Case ◽  
Microscopic Investigations

A mixture of polycarbonate (PC) and styrene-acrylonitrile-copolymer (SAN) represents a very good example for the efficiency of electron microscopic investigations concerning the determination of optimum production procedures for high grade product properties.The following parameters have been varied:components of charge (PC : SAN 50 : 50, 60 : 40, 70 : 30), kind of compounding machine (single screw extruder, twin screw extruder, discontinuous kneader), mass-temperature (lowest and highest possible temperature).The transmission electron microscopic investigations (TEM) were carried out on ultra thin sections, the PC-phase of which was selectively etched by triethylamine.The phase transition (matrix to disperse phase) does not occur - as might be expected - at a PC to SAN ratio of 50 : 50, but at a ratio of 65 : 35. Our results show that the matrix is preferably formed by the components with the lower melting viscosity (in this special case SAN), even at concentrations of less than 50 %.

Determination of the lattice translation across {110} APBs in GaAs

1988 ◽  
Vol 46 ◽  
pp. 600-601
Author(s):  
D.R. Rasmussen ◽  
N.-H. Cho ◽  
C.B. Carter
Keyword(s):  
Grain Boundaries ◽  
Lower Energy ◽  
Antiphase Boundary ◽  
The Other ◽  
Boundary Structure ◽  
Interface Plane ◽  
Inversion Symmetry ◽  
High Angle ◽  
Equilibrium Distance

Domains in GaAs can exist which are related to one another by the inversion symmetry, i.e., the sites of gallium and arsenic in one domain are interchanged in the other domain. The boundary between these two different domains is known as an antiphase boundary [1], In the terminology used to describe grain boundaries, the grains on either side of this boundary can be regarded as being Σ=1-related. For the {110} interface plane, in particular, there are equal numbers of GaGa and As-As anti-site bonds across the interface. The equilibrium distance between two atoms of the same kind crossing the boundary is expected to be different from the length of normal GaAs bonds in the bulk. Therefore, the relative position of each grain on either side of an APB may be translated such that the boundary can have a lower energy situation. This translation does not affect the perfect Σ=1 coincidence site relationship. Such a lattice translation is expected for all high-angle grain boundaries as a way of relaxation of the boundary structure.

Determination of the Burgers vector of a dislocation in a Fe-Mn alloy by weak-beam image in HVEM

1978 ◽  
Vol 36 (1) ◽  
pp. 330-331
Author(s):  
Y. Ishida ◽  
H. Ishida ◽  
K. Kohra ◽  
H. Ichinose
Keyword(s):  
High Order ◽  
Simulation Technique ◽  
The Other ◽  
Image Simulation ◽  
Diffraction Vector ◽  
Burgers Vector ◽  
Weak Beam ◽  
Beam Image ◽  
Edge Component

IntroductionA simple and accurate technique to determine the Burgers vector of a dislocation has become feasible with the advent of HVEM. The conventional image vanishing technique(1) using Bragg conditions with the diffraction vector perpendicular to the Burgers vector suffers from various drawbacks; The dislocation image appears even when the g.b = 0 criterion is satisfied, if the edge component of the dislocation is large. On the other hand, the image disappears for certain high order diffractions even when g.b ≠ 0. Furthermore, the determination of the magnitude of the Burgers vector is not easy with the criterion. Recent image simulation technique is free from the ambiguities but require too many parameters for the computation. The weak-beam “fringe counting” technique investigated in the present study is immune from the problems. Even the magnitude of the Burgers vector is determined from the number of the terminating thickness fringes at the exit of the dislocation in wedge shaped foil surfaces.

Concentration determination of chromatin in unstained resin-embedded sections by means of Z-contrast in STEM

1990 ◽  
Vol 48 (2) ◽  
pp. 186-187
Author(s):  
M. Haider ◽  
B. Bohrmann
Keyword(s):  
Energy Loss ◽  
Freeze Substitution ◽  
Biological Macromolecules ◽  
Local Concentration ◽  
E Coli ◽  
Concentration Determination ◽  
Phosphorous Content ◽  
Z Contrast ◽  
Electron Energy Loss

The technique of Z-contrast in STEM offers the possibility to determine the local concentration of macromolecules like lipids, proteins or DNA. Contrast formation depends on the atomic composition of the particular structure. In the case of DNA, its phosphorous content discriminates it from other biological macromolecules. In our studies, sections of E. coli, the dinoflagellate Amphidinium carterae and Euglena spec. cells were used which were obtained by cryofixation followed by freeze-substitution into acetone with 3% glutaraldehyde. The samples were then embedded either in Lowicryl HM20 at low temperature or in Epon at high temperature. Sections were coated on both sides with 30Å carbon.The DF- and the inelastic image have been recorded simultaneously with a Cryo-STEM. This Cryo-STEM is equipped with a highly dispersive Electron Energy Loss Spectrometer. With this instrument pure Z-contrast can be achieved either with a Filtered DF-image divided by the inelastic image or, as is used in this paper, by dividing the conventional DF-image by an inelastic image which has been recorded with an inelastic detector whose response is dependent on the total energy loss of the inelastically scattered electrons.

State-by-State Use of AMA Guides

2019 ◽  
Vol 24 (5) ◽  
pp. 3-7, 16
Keyword(s):  
Expert Testimony ◽  
Narrow Range ◽  
The United States ◽  
Workers Compensation ◽  
Federal Employees ◽  
Permanent Disability ◽  
Sixth Edition ◽  
History Of ◽  
Canadian Provinces

Abstract This article presents a history of the origins and development of the AMA Guides to the Evaluation of Permanent Impairment (AMA Guides), from the publication of an article titled “A Guide to the Evaluation of Permanent Impairment of the Extremities and Back” (1958) until a compendium of thirteen guides was published in book form in 1971. The most recent, sixth edition, appeared in 2008. Over time, the AMA Guides has been widely used by US states for workers’ compensation and also by the Federal Employees Compensation Act, the Longshore and Harbor Workers’ Compensation Act, as well as by Canadian provinces and other jurisdictions around the world. In the United States, almost twenty states have developed some form of their own impairment rating system, but some have a narrow range and scope and advise evaluators to consult the AMA Guides for a final determination of permanent disability. An evaluator's impairment evaluation report should clearly document the rater's review of prior medical and treatment records, clinical evaluation, analysis of the findings, and a discussion of how the final impairment rating was calculated. The resulting report is the rating physician's expert testimony to help adjudicate the claim. A table shows the edition of the AMA Guides used in each state and the enabling statute/code, with comments.

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