Stability Aspects of Elastomeric Isolators

1997 ◽  
Vol 13 (3) ◽  
pp. 431-449 ◽  
Author(s):  
Maura Imbimbo ◽  
James M. Kelly
Keyword(s):  
Theoretical Analysis ◽  
Critical Load ◽  
Approximate Method ◽  
Experimental Work ◽  
Complete Solution ◽  
Buckling Load ◽  
The Other ◽  
Existing Structures ◽  
End Plate ◽  
Plate Rotation

The theoretical analysis for the buckling of isolators is well known and has generally been verified by experimental work, but there are some aspects of the analysis that have not been addressed in detail. This paper will study two examples, first the effect of end plate rotation on the buckling load and, secondly, the buckling of an isolator that is made up of two bearings, one on the top of the others. The effect of end plate rotation on the buckling load arises in situations where the stiffness of the superstructure is not high enough to ensure that the isolator is constrained against rotation at the top; this is often the case when retrofitting existing structures. The influence of the flexibility of the superstructure on the horizontal stiffness of the isolator and the reduction of the critical load due to this flexibility is evaluated in the paper. The results show a significant reduction of the critical load. The second analysis presented in the paper models the buckling of a composite isolator that is made up of two bearings, one on top of the other. Two approaches for evaluating the critical load of this composite isolator are discussed, and an approximate method is developed that provides results close to the complete solution.

THEORETICAL ANALYSIS AND EXPERIMENT OF A NOVEL DEP CHIP WITH 3-D SILICON ELECTRODES

2005 ◽  
Vol 15 (02) ◽  
pp. 231-236 ◽  
Author(s):  
LIMING YU ◽  
FRANCIS E. H. TAY ◽  
GUOLIN XU ◽  
CIPRIAN ILIESCU ◽  
MARIOARA AVRAM
Keyword(s):  
Theoretical Analysis ◽  
Applied Voltage ◽  
Microfluidic Channel ◽  
The Other ◽  
Yeast Cells ◽  
Applied Potential ◽  
Dielectrophoretic Force ◽  
Joule Effect ◽  
Doped Silicon ◽  
Planar Electrodes

This paper presents a novel dielectrophoresis (DEP) device where the DEP electrodes define the channel walls. This is achieved by fabricating microfluidic channel walls from highly doped silicon so that they can also function as DEP electrodes. Compared with planar electrodes, this device increases the exhibited dielectrophoretic force on the particle, therefore decreases the applied potential and reduces the heating of the solution. A DEP device with triangle electrodes has been designed and fabricated. Compared with the other two configurations, semi-circular and square, triangle electrode presents an increased force, which can decrease the applied voltage and reduce the Joule effect. Yeast cells have been used to for testing the performance of the device.

XXVII.—The Inheritance of Long and Short Wings in the Weevil, Sitona hispidula, with a Discussion of Wing Reduction among Beetles

1928 ◽  
Vol 55 (3) ◽  
pp. 665-735 ◽  
Author(s):  
Dorothy J. Jackson
Keyword(s):  
Experimental Work ◽  
Adult Stage ◽  
Point Of View ◽  
The Other ◽  
Wing Dimorphism ◽  
Wing Reduction ◽  
Hereditary Factors ◽  
The Subject ◽  
The One ◽  
Evolutionary Point

It is well known that in many orders of typically winged insects species occur which in the adult stage are apterous or have the wings so reduced in size that flight is impossible. Sometimes the reduction of wings affects one sex only, as in the case of the females of certain moths, but in the majority of cases it is exhibited by both sexes. In many instances wing dimorphism occurs irrespective of sex, one form of the species having fully developed wings and the other greatly reduced wings. In some species the wings are polymorphic. The problem of the origin of reduced wings and of other functionless organs is one of great interest from the evolutionary point of view. Various theories have been advanced in explanation, but in the majority of cases the various aspects of the subject are too little known to warrant discussion. More experimental work is required to show how far environmental conditions on the one hand, and hereditary factors on the other, are responsible for this phenomenon. Those species which exhibit alary dimorphism afford material for the study of the inheritance of the two types of wings, but only in a few cases has this method of research been utilized.

Finally, Our Own Brown! (?)

2012 ◽  
Vol 45 (2) ◽  
pp. 267-289 ◽  
Author(s):  
Yifat Bitton
Keyword(s):  
African American ◽  
Theoretical Analysis ◽  
Supreme Court Decision ◽  
The Other ◽  
Court Decision ◽  
High Court ◽  
Court Of Justice ◽  
Us Supreme Court ◽  
Distinctive Group ◽  
Contextual Reality

The decision in Noar Kahalacha, an anti-segregation in education case that was recently delivered by the Israeli High Court of Justice, has been ‘naturally’ celebrated as the ‘Israeli Brown’. But is it? This article points to the differences between the monumental US Supreme Court decision of Brown and the Israeli Brown-equivalent – Noar Kahalacha. It contends that the two cases bear differences that stem from the divergent patterns of discrimination they represent, and that they reflect these differences squarely. The discrimination patterns reflected by the cases differ by virtue of traits that are traditionally overlooked in antidiscrimination theoretical analysis. Comparing the two cases, therefore, allows us an opportunity to revisit the notion of discrimination and its antidote, antidiscrimination. Drawing on the dichotomous concepts of de jure/de facto discrimination and difference/sameness discrimination, the article shows how these dual theoretical notions are determinative in shaping the distinctiveness of each of these cases. While the African American victims in Brown were easily recognised as a distinctive group suffering from de jure discrimination, the Mizrahi victims in Noar Kahalacha – who suffer from de facto discrimination within a Jewish hegemonic society – lacked such clear recognition. Accordingly, the discrimination narrative that Noar Kahalacha provides is very incomplete and carries only limited potential for effective application in future struggles to eliminate discriminatory practices against Mizrahis in Israel. Brown, on the other hand, carries a converse trait. Though criticised, Brown, nevertheless, strongly signifies the recognition by White America of its overarching discriminatory practices, and implies a genuine dedication to break from it. This understanding further illuminates the limitations embedded in the possibility of ‘importing’ highly contextual antidiscrimination jurisprudence from abroad into our system's highly contextual reality of discrimination.

Benessere tra differenze e disuguaglianze di genere in salute

2012 ◽  
pp. 95-113
Author(s):  
Rita Biancheri
Keyword(s):  
Theoretical Analysis ◽  
Empirical Research ◽  
Personal History ◽  
The Other ◽  
Sex And Gender ◽  
Welfare Systems ◽  
Life Context ◽  
And Gender ◽  
The One ◽  
Sick Individual

Up to now, in the traditional biomedical paradigm the terms "sex" and "gender" have either been used synonymously and the insertion of gender among the determining elements of conditions of wellbeing/disease has been difficult, and obstructed by disciplinary rigidities that retarded the acceptance of an approach which had already been largely found to be valid in other areas of research. The effected simplification demonstrated its limitations in describing the theme of health; but if, on the one hand, there has been a growing awareness of a subject which can in no way be considered "neutral", on the other hand there continues to be insufficient attention, both in theoretical analysis and in empirical research, given to female differences. The article is intended to support that the sick individual is a person, with his/her genetic heritage, his/her own cultural acquisitions and personal history, and own surrounding life context; but these and similar factors have not traditionally been taken into consideration by official medicine and welfare systems, despite a hoped-for socio-health integration.

scholarly journals Developing Soft Skills among Potential Employees: A Theoretical Review on Best International Practices

2021 ◽  
Vol 12 (2) ◽  
Author(s):  
Oleksandr Malykhin ◽  
Nataliia Oleksandrivna Aristova ◽  
Liudmyla Kalinina ◽  
Tetyana Opaliuk
Keyword(s):  
Professional Development ◽  
Theoretical Analysis ◽  
Soft Skills ◽  
The Other ◽  
Skills Development ◽  
Common Language ◽  
The Common ◽  
The One ◽  
A Company ◽  
Selection Of

The present paper addresses the issue of determining the best international practices for developing soft skills among students of different specialties through carrying out a theoretical review. Basing on literature on present-day theory the authors make an attempt to explain soft skills dichotomies, summarize existing approaches to classifying soft skills, consolidate and document best international practices for soft skills development among potential employees of different specialties including bachelor students, master students, doctoral and postdoctoral students. The data obtained in the theoretical analysis reveal that the possible ambiguities in the interpretation of the concept of “soft skills” are caused, on the one hand, by the dichotomic perception of their nature by present-day researchers and educators and, on the other hand, by the absence of the common language which makes it difficult to provide a more unified definition most satisfactory to all concerned. The authors are convinced that soft skills have a cross-cutting nature and regard them as personal and interpersonal meta-qualities and meta-abilities that are vital to any potential employee who is going to make positive contributions not only to his/her professional development but to the development of a company he/she is going to work for. The results of the conducted theoretical review clearly indicate that the absence of the unified understanding of the concept of “soft skills” is reflected in the existence of different approaches to classifying soft skills, let alone, the selection of didactic tools for developing soft skills among potential employees.

scholarly journals CONCEPT OF THE STUDY OF ART BY R.J. COLLINGWOOD AS AN OBJECT OF THEORETICAL ANALYSIS

2020 ◽  
pp. 36-40
Author(s):  
M. V. Ternova
Keyword(s):  
Theoretical Analysis ◽  
Art History ◽  
Art Criticism ◽  
The Other ◽  
Historical Period ◽  
Rudyard Kipling ◽  
Cultural Traditions ◽  
Avant Garde ◽  
History Analysis ◽  
The One

The article analyzed concept of the study of art by Robin George Collingwood (1889-1943), a well-known English neo-hegelian philosopher. His significant part of the theoretical heritage is connected with the explanation of the nature of art and with the consideration of its condition during the period of the changing Oscar Wilde era to the era of Rudyard Kipling. The circle of problem such as content and form, character, image, mimesis, reflection, emotion, art and "street man" identified. All of them in Collingwood's presentation and interpretation significantly expanded the space of research not only English, but also European art criticism. The concept of study of art is "built" on the basis of an active understanding of historical and cultural traditions accented. The concept of art criticism of R.G. Collingwood – a famous English philosopher of the XIX-XX centuries, on the one hand, has self-importance, and on the other, although based on the traditions of contemporary humanities, still expands art history analysis of aesthetics through aesthetics and psychology. Recognizing the exhaustion of the English model of romanticism, R.G. Collingwood tries to outline the prospects for the development of art in the logic of the movement "romanticism – realism – avant-garde", which leads to the actualization of the problem of "mimesis – reflection". At the same time, the theorist's attention is consciously concentrated around the concept of "subject", the understanding of which is radically changing at the turn of the XIX-XX centuries. Theoretical material in the presentation of R.G. Collingwood is based on the work of Shakespeare, Reynolds, Turner, Cezanne, whose experience allows us to focus on the problem of "artist and audience". It is emphasized that Collingwood's position is ahead of its time, stimulating scientific research in the European humanities. The existence of indicative tendencies, which are distinguished in the logic of European cultural creation of the historical period, is emphasized.

scholarly journals Scratch-Profiles Study in Thin Films Using SEM and EDS

1984 ◽  
Vol 11 (3) ◽  
pp. 237-241 ◽  
Author(s):  
M. El-Shabasy ◽  
L. Pogány ◽  
G. Konczos ◽  
E. Hajtó ◽  
B. Szikora
Keyword(s):  
Thin Films ◽  
Surface Morphology ◽  
Critical Load ◽  
Conventional Method ◽  
Experimental Work ◽  
Measuring Method ◽  
Shearing Stress ◽  
Line Profiles ◽  
X Ray ◽  
Thickness Profile

The adhesion of evaporated or sputtered thin films to substrates is one of the most important characterising parameters in their fabrication. It is a conventional method to scratch the films using a stylus and evaluate the shearing stress, which is proportional to the energy of adhesion. For the evaluation it is necessary to determine the so-called critical load and the profile of the scratch.The aim during this experimental work was to find a method to evaluate the scratch profile from the X-ray-line profile and SEM pictures. From SEM pictures, the lateral dimensions and surface morphology of the scratches were studied. The thickness was also studied from X-ray-line profiles.In this paper the thickness profile measuring method and the conclusion for the scratch method are discussed.

Unconditional and conditional as categories of the dialectic of law

2021 ◽  
pp. 58
Author(s):  
Grigory N. Utkin
Keyword(s):  
Theoretical Analysis ◽  
Social Life ◽  
The Other ◽  
Other Hand ◽  
Dialectical Relationship ◽  
Three Stages ◽  
The One ◽  
Dialectical Analysis ◽  
Conceptual Meaning

The article reveals the conceptual, meaning-forming role of the categories of the unconditional and conditional in law. At the same time, their dialectical relationship with each other and with other categories is put in the center of attention. The dialectic of the unconditional and conditional is revealed by achieving the unity of the three stages of theoretical analysis, which allows us to present the unconditional and conditional, on the one hand, as the content of all concepts, through which the idea of law is generally expressed in various aspects and elements; on the other hand, the entire set of categories subject to dialectical analysis appears as elements of the content of the unconditional and conditional as semantic units that Express the universal characteristics of law in its features, isolation from other forms of social life.

“ Ten Years' Testing of Model Seaplanes ”

1923 ◽  
Vol 27 (149) ◽  
pp. 224-243
Author(s):  
G. S. Baker
Keyword(s):  
Experimental Work ◽  
Royal Society ◽  
General Meeting ◽  
National Physical Laboratory ◽  
The Other ◽  
Experimental Tank ◽  
Know How ◽  
Other Hand ◽  
Physical Laboratory ◽  
Hull Design

An Ordinary General Meeting- of the Society was held at the Royal Society of Arts, on Thursday, February ist, 1923, Professor L. Bairstow in the chair.The Chairman, in opening- the proceedings, said that Mr. G. S. Baker, O.B.E., of the National Physical Laboratory, would deal with flying boats and seaplanes. He would deal with the hull and its design, that part of the seaplane which differentiates it from the aeroplane. That subject had been touched on very lightly by Major Rennie at the previous meeting of the Society, in view of the present paper by Mr. Baker.Mr. Baker had begun work in 1912 on the problems of hull design, at a time when nothing of a definite nature was known; a few individual experiments had been carried out, but there was no systematised knowledge at all at that time. From that state of ignorance a great deal of experimental work had now rescued us. He did not know how far Mr. Baker would stress the point, but it was quite clear, from the investigation of certain accidents to seacraft, that there were fundamental differences in the behaviour of seaplane hulls on the water, differences which had a great deal of effect on the risk of flying-. For instance, if one type of hull was such that when the plane rose in the air it stalled, then all the aerodynamical consequences of stalling- followed, and there was difficulty. On the other hand, it appeared that we had a type of flying- boat which did not make the plane stall on getting into the air, and consequently if it came back to the water it was still controlled. For this type of development, which he believed really dated back to the C.E.i, we were mainly indebted to Mr. Baker and his associates at the National Physical Laboratory, and to the generosity of Sir Alfred Yarrow in placing such a magnificent piece of apparatus as the experimental tank at the disposal of the nation.Mr. Baker then read his paper on “ Ten Years’ Testing of Model Seaplanes.”

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