scholarly journals Reflections on the Hysteretic Damping Model

2009 ◽  
Vol 16 (5) ◽  
pp. 529-542 ◽  
Author(s):  
Nuno Maia

This paper presents a reflection on a recently proposed solution to the problem of the free vibration response with the constant hysteretic damping model, that has been presented in some conferences in recent years, by the author himself and some of his colleagues. On the one hand, as expected, the subject has been received with natural criticism, mainly due to the well-known non-causal behaviour of the model in free vibration. On the other hand, it was not easy to understand what could be wrong in that proposal, as apparently everything was perfect from a mathematical point of view. The author decided that this subject deserved a more careful and detailed analysis and – in this kind of tutorial paper – the issue seems to have been clarified. It is concluded that the proposed solution involving the constant hysteretic damping corresponds in fact to an equivalent viscously damped model; it is therefore concluded that the application of the constant hysteretic damping to model the free vibration of practical engineering problems should be considered only in the perspective of an equivalent viscously damped model.

1928 ◽  
Vol 55 (3) ◽  
pp. 665-735 ◽  
Author(s):  
Dorothy J. Jackson

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.


1981 ◽  
Vol 11 (1) ◽  
pp. 44-46 ◽  
Author(s):  
D.P. Fourie

It is increasingly realized that hypnosis may be seen from an interpersonal point of view, meaning that it forms part of the relationship between the hypnotist and the subject. From this premise it follows that what goes on in the relationship prior to hypnosis probably has an influence on the hypnosis. Certain of these prior occurences can then be seen as waking suggestionns (however implicitly given) that the subject should behave in a certain way with regard to the subsequent hypnosis. A study was conducted to test the hypothesis that waking suggestions regarding post-hypnotic amnesia are effective. Eighteen female subjects were randomly divided into two groups. The groups listened to a tape-recorded talk on hypnosis in which for the one group amnesia for the subsequent hypnotic experience and for the other group no such amnesia was suggested. Thereafter the Stanford Hypnotic Susceptibility Scale was administered to all subjects. Only the interrogation part of the amnesia item of the scale was administered. The subjects to whom post-hypnotic amnesia was suggested tended to score lower on the amnesia item than the other subjects, as was expected, but the difference between the mean amnesia scores of the two groups was not significant.


Author(s):  
Dr.Hamid Suleiman Khalaf Kadhim

In human languages proverbs constitute a very important aspect of language use. Thus, they have been a subject of varying attention from different specialists: linguists and language users in general. Shakespeare is described as the most adroit user of proverbs in literature; therefore, his plays have been the subject of numerous scientific investigations, whereby from a linguistic point of view the focus has primarily been aimed at vocabulary and grammar. On the one hand, attention has been paid regularly to lexical items because Shakespeare is supposed to have been a great innovator of words due to his coinage of new lexemes and his usage of several unknown expressions. Linguistic studies have also been concerned with grammatical constructions which are typical of the English at Shakespeare’s time. Many writers employ proverbs in their works but Shakespeare is different in the way he employs proverbs which are used to serve different functions and to achieve different illocutionary acts. These proverbs are embedded in the flow of conversations and they may flout one or more than one of Grice‘s maxims. The present study aims at analyzing proverbs and explaining how far Grice’s cooperative principles (maxims) are abided by in Shakespeare’s proverbs as specified in the data. Proverbs are sometimes said to mean something else in addition to what is explicitly stated. Words may mean something beyond those intended by the speaker or the writer. These extra meanings might achieve or refer to different illocutionary acts. The study explores whether or not these illocutionary acts share certain structural features. In order to achieve the aims of the research, the following hypotheses have been proposed: Grice’s cooperative principle is frequently flouted in Shakespeare’s proverbs. The maxim of Quality seems to be flouted more than the other maxims. This maxim is mainly flouted by the use of metaphor. Shakespeare’s proverbs are also characterized by the use of the speech


Author(s):  
Natalya N. Rostova

The article examines the work of Vasily Polenov. The author presents Polenov’s artistic path as the dramatic choice between what is commonly called genre and landscape painting. From the philosophical point of view, the problem consists in concept of understanding art. On the one hand, the essence of art can be reduced to «what», to writing a story, a big sense. On the other hand, art can be understood as «painting for painting’s sake». In this sense, the tension in Polenov’s work arises between the paintings «Moscow Courtyard» and «Christ and the Sinner». The author notes that the way out of this dilemma is to understand art as the subject that reflects the non-objectifiable and devoid of anything essence. The article analyzes the philosophical meaning of Polenov’s paintings of the gospel cycle and provides a philosophical analysis of the artist’s nostalgic paintings. The author comes to the conclusion that Polenov’s paintings are the form that establishes an emotionally experiencing human being


2021 ◽  
Vol 47 (1) ◽  
pp. 149-165
Author(s):  
Lela Alexidze

Ioane Petritsi, the twelfth century Georgian Christian Neoplatonist, wrote a commentary on Proclus’ Elements of Theology. In his work Petritsi goes far beyond the material contained in Proclus’ Elements, discussing the issues which are the subject of other treatises of ancient Greek philosophers. The aim of this paper is to analyze Petritsi’s point of view on the creator of the visible world, i.e. the demiurge of Plato’s Timaeus. In Petritsi’s commentary, on the one hand, the features of the supreme One and the demiurge as producers of the universe are in certain cases quasi identical, although on the other hand, the demiurge represents a lower level of intellect than the true being and in some cases is absent in places where a reader, following the context of Petritsi’s commentary, expects his presence.


2016 ◽  
Vol 8 (3) ◽  
pp. 681 ◽  
Author(s):  
Aleksandar Palavestra

Miloje M. Vasić, "the first academically educated archaeologist in Serbia", has a strange destiny in the Serbian archaeology. On the one hand, he has been elevated to the post of the "founding father" of the discipline, with almost semidivine status and iconic importance, while on the other hand, his works have been largely unread and neglected. This paradoxical split is the consequence of the fact that Vasić has been postulated as the universal benchmark of the archaeological practice in Serbia, regardless of his interpretation of the past on the grounds of the archaeological record – the essence of archaeology. Strangely, the life and work of Vasić have not been the subject of much writing, apart from several obituaries, two short appropriate texts (Srejović, Cermanović), and rare articles in catalogues and collections dedicated to the research of Vinča (Garašanin, Srejović, Tasić, Nikolić and Vuković). The critical analysis of his whole interpretive constellation, with "The Ionian colony Vinča" being its brightest star, was limited before the World War II to the rare attempts to rectify the chronology and identify the Neolithic of the Danube valley (Fewkes, Grbić, Holste). After the war, by the middle of the 20th century, the interpretation of Vasić has been put to severe criticism of his students (Garašanin, Milojčić, Benac), which led to the significant paradigm shift, the recognition of the importance of the Balkan Neolithic, and the establishment of the culture-historical approach in the Serbian archaeology. However, from this moment on, the reception of Vasić in the Serbian archaeology has taken a strange route: Vasić as a person gains in importance, but his works are neglected, though referred to, but almost in a cultic fashion, without reading or interpreting them. Rare is a paper on the Neolithic of the Central Balkans that does not call upon the name of Vasić and his four- volume "Vinča", in which Neolithic is not mentioned at all. This paradox becomes clearer if Vasić is regarded through the prism of the problematic, but not yet challenged and universally praised values in the Serbian archaeology: material, fieldwork and authority, as opposed to interpretation, which is regarded as ephemeral. From this point of view it becomes clear how the image of Vasić grows into the icon of the Serbian archaeology, while his work slides into the domain of the oral tradition, half-truths, and apocryphal anecdotes. Considering that the majority of the Serbian archaeological community shares the belief that there is an absolute archaeological method and "pure" archaeological material, both representing "the data not burdened by theory", the field journals of Vasić and his published works become the source of the "material", while his interpretation of the past is neglected. As long as these "data" are not considered in connection to the whole opus of Vasić, the research questions and strategies that directed his work, the Serbian archaeology will be inhabited by two separate images: one – forefather and founder, the researcher of the Neolithic Vinča, "the first real Serbian archaeologist", whose face gazes at us sternly from the bronze busts and enlarged photographs, and the other – vulnerable and insulted dreamer, convinced in his philhellene delusion. Only the integration of these two images will pay due homage to Miloje M. Vasić.


2019 ◽  
Vol 17 (2) ◽  
pp. 41-64
Author(s):  
Agnieszka Legucka

This article is devoted to the evaluation of the Eastern Partnership from the point of view of the implementation of Russia’s foreign policy. Using the research approach of constructivism, it analyses Russia’s attitude towards the EU’s Eastern Partnership project, as well as Russia’s reactions to the implementation of the EaP. Therefore, the subject of the analysis is not so much the relations of the EU and Russia with six states: Armenia, Azerbaijan, Belarus, Georgia, Moldova and Ukraine, as well as Russia’s and the EU’s narratives on its neighbourhood. This will make it possible to examine to what extent the position of one actor (EU) in relation to another (Russia) has been strengthened/weakened and, secondly, how the argumentation has promoted (the given message) in legitimizing the project as a whole, for both internal and external use. These projects were, on the one hand, Russia’s “close abroad” and, on the other, the EU’s “common neighbourhood”.


PEDIATRICS ◽  
1957 ◽  
Vol 19 (4) ◽  
pp. 749-754
Author(s):  
James V. Neel

A BRIEF SURVEY of the vast subject of "Genetics and Human Congenital Malformations" can scarcely be expected to be systematic. Accordingly, discussion of the subject will be limited to a series of more or less unrelated observations concerning genetics and the study of human teratology. The first portion of this discussion will be devoted to three general points concerning which there seems to be room for misunderstanding between the genetically and nongenetically oriented student of teratology. The latter portion of the discussion will be concerned with drawing attention to some general genetic approaches which may be profitable in specific areas. In approaching the material in this fashion, familiarity with the current status of work on human teratology is assumed. It is further assumed that the principal reason for this Conference on Teratology is to consider useful lines of attack on outstanding problems in this area. It is important at the outset to establish the fact that, from the genetic point of view, human malformations are a very "mixed bag" indeed. At the one extreme there are malformations which have a clear-cut and relatively simple genetic basis. Many of the skeletal malformations, such as the relatively benign brachydactyly or polydactyly, or the more serious ectrodactyly (split hand) or acheiropodia, fall into this category. At the other extreme there are a few malformations, such as tracheo-esophageal fistula1 which thus far have not been demonstrated to show a noteworthy tendency to concentrate in particular families. The majority of congenital malformations fall into neither of these extremes, showing clearly statistical tendencies to occur in certain families, but in these tendencies not following any simple pattern.


2019 ◽  
pp. 27-42
Author(s):  
Darin Tenev

In this paper I will envisage the relationship between narrative modalities and point of view with the help of the narratological theory of Christo Todorov, who is a representative of the Bulgarian Guillaumist school. First, I will point to the multimodality of narrative modal logic with its combination of different types of modal categories (alethic, deontic, volitive, etc.). Then I will introduce Christo Todorov’s distinction between modal and transmodal categories, according to which modality (ability, desire, obligation) is what characterises the actions and transmodality (perception, emotion, intellection) is what characterises the subject of action. Along with Todorov I will claim that there are both modal and transmodal points of view, but unlike him I will define the point of view based not on the subject-image but on the directedness it introduces. My point will be that there is a double direction of the point of view: on the one hand, the direction of the subject to the object, and, on the other, the direction from one modality to another. This double direction, I will argue, is at the very basis of narrative logic, or of what I would call the ‘narrative potentiality.’


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