A Rational Definition of Yield Strength

1940 ◽  
Vol 44 (356) ◽  
pp. 653-656
Author(s):  
W. R. Osgood
Keyword(s):  
Yield Strength ◽  
Structural Damage ◽  
Structural Elements ◽  
Conventional Methods ◽  
Definition Of ◽  
Maximum Stresses

Explicitly or implicitly the yield strength of a material is often used as a measure of incipient structural damage. With the yield strength determined by conventional methods, however, it cannot be said in general for two structural elements geometrically alike but of different materials that similar loads, producing maximum stresses equal to the yield strengths in the two cases, are simply related to the yield strengths. A definition of yield strength is proposed in this paper which often has the advantage that, for geometrically similar structures of different materials, loads producing maximum stresses equal to the yield strength are proportional to the yield strength.

A Rational Definition of Yield Strength

1940 ◽  
Vol 7 (2) ◽  
pp. A61-A62
Author(s):  
W. R. Osgood
Keyword(s):  
Yield Strength ◽  
Structural Damage ◽  
Structural Elements ◽  
Conventional Methods ◽  
Definition Of ◽  
Maximum Stresses

Abstract Explicitly or implicitly the yield strength of a material is often used as a measure of incipient structural damage. With the yield strength determined by conventional methods, however, it cannot be said in general for two structural elements geometrically alike but of different materials that similar loads, producing maximum stresses equal to the yield strengths in the two cases, are simply related to the yield strengths. A definition of yield strength is proposed in this paper which often has the advantage that, for geometrically similar structures of different materials, loads producing maximum stresses equal to the yield strength are proportional to the yield strength.

scholarly journals EFFECT OF GAMMA IRRADIATION ON THE DESOXYRIBONUCLEASE II ACTIVITY OF ISOLATED MITOCHONDRIA

1957 ◽  
Vol 3 (2) ◽  
pp. 239-248 ◽  
Author(s):  
Shigefumi Okada ◽  
Lee D. Peachey
Keyword(s):  
Structural Damage ◽  
Liver Homogenate ◽  
Liver Mitochondria ◽  
Structural Elements ◽  
Dnase Ii ◽  
Mitochondrial Structure ◽  
Co60 Source ◽  
Mitochondrial Suspension ◽  
High Doses ◽  
Isolated Liver

1. Exposure of isolated liver mitochondria to high doses of gamma rays from a Co60 source causes the level of DNase II activity to increase. Treatment of the mitochondria with sonic vibration causes a further elevation of the activity to a level which is independent of the prior radiation dose. 2. Such increased mitochondrial DNase II activity appears to be due to the "structural damage" of the subcellular particulates caused by the ionizing radiation. Other methods of disrupting the mitochondrial structure also cause increased DNase II activity. A causal relationship between the structural alteration and the increased enzymatic activity is postulated. 3. The DNase II activity appears to be closely associated with the structural elements of the mitochondria and remains associated with the fragments after irradiation. 4. Upon irradiation, the mitochondrial suspension releases ultraviolet-absorbing materials which are probably nucleotide in nature. 5. The possibility of localization of DNase activity in the lysosome fraction of de Duve (15) is discussed. It is felt that DNase II is at least in part a mitochondrial enzyme and that probably the conclusions drawn here would be applicable to any DNase II present in the lysosomes as well. 6. Irradiation of whole liver homogenate causes no increased DNase II activity. The experiments do not provide any information on the presence or action of protective substances in the homogenate.

Innovative Approaches to the Formation and Development of the Startup Ecosystem

2021 ◽  
Vol 12 (3) ◽  
pp. 668
Author(s):  
Nataliia DEMIANENKO ◽  
Ilona YASNOLOB ◽  
Oleg GORB ◽  
Oleksii Zoria ◽  
Liudmyla CHIP ◽  
...  
Keyword(s):  
Business Environment ◽  
Structural Elements ◽  
Entrepreneurial Universities ◽  
Entrepreneurial Ecosystems ◽  
Innovative Products ◽  
Definition Of ◽  
Innovative Approaches

The article is devoted to considering the peculiarities of startup ecosystem formation. Modern theoretical views on the definition of startup ecosystem have been studied. The author’s definition of “startup ecosystem” term has been given. Innovation and entrepreneurial ecosystems aimed at creating innovative products and services by startup companies have been analyzed. The structural elements of startup ecosystem under endogenous and exogenous changes in the business environment have been singled out. The situation of startup development in Ukraine and their further prospects have been analyzed. Emphasis has been placed on the formation of entrepreneurial universities as an important component of the ecosystem. The experience of leading countries in the implementation and formation of startup ecosystem has been studied and adapted.

IMPERFECT COORDINATION IN OPTIMIZATION

2009 ◽  
Vol 20 (04) ◽  
pp. 527-538 ◽  
Author(s):  
ELENA RAMÍREZ BARRIOS ◽  
JUAN G. DÍAZ OCHOA
Keyword(s):  
Control Function ◽  
Optimization Method ◽  
Free Lattice ◽  
Conventional Methods ◽  
Definition Of

We present a novel optimization method for an Ising like system suspended in a lattice with nonstatic defects. Depending on the size of the experimental probe the system spontaneously defines a defect free lattice where the control function can be optimized using conventional methods as Metropolis heuristics. We illustrate this method in a lattice with variable defects and show how the magnetization of the system depends on the spontaneous definition of the defect-free lattice. This approximation should be useful as a basis for the definition of systems of agents with imperfect coordination.

scholarly journals The Influence Of The Energy Factor On Modern International Relations

2020 ◽  
Vol 02 (12) ◽  
pp. 5-15
Author(s):  
Mukhammadolim Mukhammadsidiqov ◽  
◽  
Abrar Turaev ◽  
Keyword(s):  
International Relations ◽  
Energy Security ◽  
Structural Elements ◽  
Methodological Issues ◽  
Interstate Relations ◽  
Energy Factor ◽  
Definition Of ◽  
Methodological Aspects

This article examines the theoretical and methodological aspects of the problem of energy security, which is becoming a topical geopolitical issue today. In particular, the interpretations of the concept of energy security, its transformation into a geopolitical factor and the structural elements of energy security are highlighted. The focus is on modern approaches and trends in energy security, as well as theoretical and methodological issues in the analysis of regional aspects of energy security. At the same time, efforts will be made to reveal the scale of threats to energy security and the destructive factors that make energy security relevant, their impact on interstate relations and political destabilization. The article summarizes the author's definition of the concept of energy security.

scholarly journals Land dispute as an object of arbitration process

2021 ◽  
Vol 39 (3) ◽  
pp. 118-122
Author(s):  
M. A. Magomedova ◽  
Keyword(s):  
Russian Federation ◽  
Structural Elements ◽  
Legal Concept ◽  
Land Dispute ◽  
Correct Definition ◽  
Arbitration Process ◽  
The Subject ◽  
The Russian Federation ◽  
Characteristic Features ◽  
Definition Of

In the current legislation of the Russian Federation, there is no concept of a land dispute, which causes difficulties in determining the competence of an arbitration court in cases in which the object of the dispute is land. The article analyzes the general legal concept of a dispute and the sectoral concept of a land dispute developed by scientists. The author identified the characteristic features of a land dispute and its structural elements. The work reveals the influence of the structural elements of the land dispute on the type of production in which the dispute will be considered. In addition, the author concludes that the correct definition of the structural elements of the land dispute enables the arbitration court to determine the appropriate persons participating in the case, the subject of proof, the relevance and admissibility of evidence, and ultimately make a lawful and wellgrounded court decision.

scholarly journals What Does it Mean to be a Woman in Sports? An Analysis of the Jurisprudence of the Court of Arbitration for Sport

2020 ◽  
Vol 20 (3) ◽  
pp. 387-411
Author(s):  
Lena Holzer
Keyword(s):  
Human Rights ◽  
Sex And Gender ◽  
Structural Elements ◽  
Sports Law ◽  
Legal Studies ◽  
Caster Semenya ◽  
History Of ◽  
Scientific Dispute ◽  
And Gender ◽  
Definition Of

ABSTRACT This article explores the definition of ‘sportswoman’ as put forward in the Caster Semenya case (2019) and the Dutee Chand case (2015) before the Court of Arbitration for Sport (CAS). It analyses the structural and discursive factors that made it possible for the CAS to endorse a definition that reduces sex and gender to a matter concerning testosterone. By relying on the concept of intersectionality and analytical sensibilities from Critical Legal Studies, the article shows that framing the cases as a matter of scientific dispute, instead of as concerning human rights, significantly influenced the CAS decisions. Moreover, structural elements of international sports law, such as the lack of knowledge of human rights among CAS arbitrators and a history of institutionalising gendered and racialised body norms through sporting regulations, further aided the affirmation of the ‘testosterone rules’.

scholarly journals Damaged Flexibility Matrix Method for Damage Detection of Frame Buildings

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Luis S. Vaca Oyola ◽  
Mónica R. Jaime Fonseca ◽  
Ramsés Rodríguez Rocha
Keyword(s):  
Damage Detection ◽  
Matrix Method ◽  
Structural Damage ◽  
Numerical Models ◽  
Structural Elements ◽  
Structural Element ◽  
New Approach ◽  
Building Model ◽  
Flexibility Matrix ◽  
Frame Buildings

This study presents the damaged flexibility matrix method (DFM) to identify and determine the magnitude of damage in structural elements of plane frame buildings. Damage is expressed as the increment in flexibility along the damaged structural element. This method uses a new approach to assemble the flexibility matrix of the structure through an iterative process, and it adjusts the eigenvalues of the damaged flexibility matrices of each system element. The DFM was calibrated using numerical models of plane frames of buildings studied by other authors. The advantage of the DFM, with respect to other flexibility-based methods, is that DFM minimizes the adverse effect of modal truncation. The DFM demonstrated excellent accuracy with complete modal information, even when it was applied to a more realistic scenario, considering frequencies and modal shapes measured from the recorded accelerations of buildings stories. The DFM also presents a new approach to simulate the effects of noise by perturbing matrices of flexibilities. This approach can be useful for research on realistic damage detection. The combined effects of incomplete modal information and noise were studied in a ten-story four-bay building model taken from the literature. The ability of the DFM to assess structural damage was corroborated. Application of the proposed method to a ten-story four-bay building model demonstrates its efficiency to identify the flexibility increment in damaged structural elements.

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