Time-Dependent Landau-Ginzburg Modelling of Magnetic Inhomogeneities and Spiral Domain Structures in Thin Films

1989 ◽  
Vol 151 ◽  
Author(s):  
J. A. Tuszyński

ABSTRACTA Landau-Ginzburg model for a uniaxial ferromagnetic thin film is presented which includes inhomogeneities due to nearest neighbor exchange interactions. The role of external magnetic fields is studied in the determination of exact symmetries of the equation of state. Spiral domain structures allowed by symmetry considerations as exact solutions at the critical and tricritical points have recently been found experimentally in epitaxially grown single-crystal garnet ferrite films. These experiments are discussed from the point of view of our model.


2018 ◽  
Vol 6 (3) ◽  
pp. 9-15
Author(s):  
С. Кутепов ◽  
S. Kutepov

long-awaited Concept of teaching the subject area “Technology”, the project of which is analyzed in the article,defi nes the problems facing the teacher. The author illustrates these problems and the characterized directions of teaching the subject area “Technology” with the possible fragments of the content of technological education. The author shows which information should be used at the stage of the development of schoolchildren’s basic application skills of the main types of hand tools (electrical including) as a resource for solving technological problems which are the priority results of the mastering the subject area “Technology”. The article suggests the knowledge necessary for ecological education of schoolchildren, formation of their world outlook, provided that the interdisciplinary relations are established. The problems of the environmentally friendly production organically associated with the problems of modern economy allow us to solve the problem of economic education. The article proves that the subject of “Technology” is supposed to create certain patterns of thinking and behavior of schoolchildren, introduce them into the world of professions, and ensure professional self-determination of schoolchildren.



2021 ◽  
Vol 6 (2) ◽  
pp. 71-81
Author(s):  
Marcela Spišáková ◽  
Daria Mokrenko

On the present, the problem of renovation of historical buildings is becoming more and more actual. The role of society is to protect and renovate the historical monuments. The presented article focuses on the problem of renovation of historic buildings from a structural, technological and cost point of view. During the solution of the case study "Renovation of roof structure of the Old Town Hall in Košice", a variant solution of the historic roof renovation was designed in accordance with the principles of historical buildings renovation. Subsequently, the evaluation of the technological and cost parameters for renovation; and determination of the optimal variant for renovation of the historical roof was processed through the methods of multicriterial analysis.



2020 ◽  
Vol 10 ◽  
pp. 17-20
Author(s):  
Evgeniy A. Tarasov ◽  

From the point of view of tasks and methodology judicial auto technical examination is considered as a means of obtaining reasonable information for objective consideration of circumstances of road accidents and offenses. The purpose of auto technical expertise as a variety or kind of engineering and transport expertise is to establish all the circumstances associated with an accident or a crime in which the car played the role of object, means, evidence, carrier traces. The criteria allowing to classify a specialist to the category of experts with special knowledge in the field of automotive engineering are presented. The types of forensic auto technical expertise are given. It is said that it is part of the competence of the expert-automotive. The competence of the automotive expert allows to conduct research and give conclusions on specific issues related to vehicles and the road situation in its dynamics, the consequences of accidents. The purpose of the article is to draw the attention of interested persons and organizations to the need to accurately determine the forensic automotive expertise and expert-automotive technician to eliminate a number of issues of a procedural and technical nature.



1958 ◽  
Vol 148 (932) ◽  
pp. 285-290 ◽  

This discussion was arranged in the belief that diverse lines of research with microorganisms had contributed materially to the solution of the role of the cytoplasm in differentiation, and that the time was ripe to review the relationships and degree of accord between at least some of these newer lines of work. The treatment is from three points of view. First, there is the morphological framework as revealed by electron microscopy. Even though the genetic functions of the structures so revealed are as yet unknown, the fine-structure of the cytoplasm must ultimately be related to the expression of genetic functions. Secondly, there is the genetic determination of cytoplasmic variations, their nature and their stability and plasticity and the interdependence of nucleus and cytoplasm. Thirdly, there is a consideration of the biochemical self-sufficiency of the cytoplasm and its stability in terms of enzymes. It has often been stated that from the point of view of heritable variation, the cytoplasm plays a minor role. However, it plays the major role in expressing the characters determined by the genes, and its history and the effect of the environment upon it are not without influence upon the characters expressed, just as the genes influence one another. Thus the action of a gene, by which it is recognized, may be expressed in some cells or tissues, but apparently not in others. By orderly control of which genes appear to act at a given time, cells may be differentiated sequentially in a tissue for specialized functions.



Traditio ◽  
1964 ◽  
Vol 20 ◽  
pp. 473-490
Author(s):  
Herbert Musurillo

Since our last report in these pages we have witnessed another successful International Patristic Conference at Oxford in September, 1963; the publication of the papers is earnestly awaited at this writing. Also, since the last bibliographical survey, we have observed two sessions of Vatican Council II, which boasts the largest attendance in the history of ecumenical councils, and perhaps the longest list of schemata or agenda. Here, among the innumerable questions which touched on the aggiornamento of the Church, so dear to the heart of the late Pope John XXIII, who first broached the subject of a council as early as 1959, there have been long discussions about the modernization and adaptation of the liturgy, and the clarification of the relationship between the various sources of Christian belief, that is, the Fathers, Scripture, and tradition, with a special eye to the modern communication of the Church's message. Both of these schemata should be of unparalleled interest to all scholars who concern themselves with the problems of the Christian tradition, and the completion of both of these doctrinal sections is eagerly awaited. Other problems of importance will of course be the relation of the Catholic to the non-Catholic groups, the role of the laity in the Church, the power of the bishops vis-à-vis the Roman Curia, the function of religious orders and congregations, and many more. The present Vatican Council is the twenty-first in a series which began with a small group of bishops who met for a few months in the year 325 under the emperor Constantine at the tiny Asiatic town of Nicaea. Of these twenty councils, however, some non-Catholic groups recognize merely the first four, Nicaea, Constantinople, Ephesus, and Chalcedon; whereas the Separated Eastern churches accept the first seven, that is, down to the second Council which met at Nicaea in 787. Actually, in the present administration of the Church, ecumenical councils are not strictly necessary; but a council, once invoked, becomes a testimony of faith and unity, and from this point of view, the determination of doctrine and discipline is sometimes secondary. Yet it is true to say that from the doctrinal point of view, the two most controversial councils were the two most recent ones, the nineteenth, the Council of Trent (1545-63), and the twentieth, Vatican Council I (1869-70). Without entering into controversy, I think it may be said that these two Councils set patristic scholars of different beliefs farther apart. In any case, the period between Trent and Vatican saw the rise of different schools of patristic scholarship, each attempting to find textual evidence for their own point of view. But, curiously enough, with the rise of the great schools of research in England, France, Germany, Holland and Belgium, the Scandinavian countries, and America, and with the insistence on well-grounded textual studies, the gap between the patristic scholars of different schools of thought has noticeably narrowed. This has been demonstrated not only by the publication of common research projects, but also by the success of such conferences as the International Patristic Conference at Oxford occurring every four years, with the results appearing in Texte und Untersuchungen. It is also shown, I think, in the vast bibliographical project Bibliographia Patristica (Berlin: de Gruyter) under the editorship of W Schneemelcher with the collaboration of an international group of scholars, and now in its fifth volume (publications for 1960-1962). This has been no small achievement. It is therefore all the more profoundly to be hoped that the original pastoral theme enunciated for the Vatican Council by Pope John XXIII in 1959 will remain dominant to the end, promoting a familial atmosphere among all men of good will, and (with special regard for our interests) encouraging a universality among all patristic scholars without prejudice to the quality of their own individual research.



Author(s):  
Luigi Trentin

The text starts from some observations on the role of color as an element of the language of cinema. In a particular way, two films are compared: Ran by Akira Kurosa and Spring, Summer, Autumn, Winter…and Spring by Kim-duk KIm. The two films show how color can take on a narrative character, but according to two different point of view. The modern idea of color is clearly expressed in the first: the white light is split through Newton's prism and generates the primary colors: origin of the story and determination of the role of the characters. Pre-modern colors are expressed in the second film: they cannot be split because they belong to the physicality of things and cannot be mixed because their nature is chemically different. This difference exists even if we extend our observations to the world of materials. The prevalence of surface values brought into the project world has a perfect simulation situation of different materials that have a completely different nature inside. The text develops these considerations, showing how in a prevalence of the surface value of things.



2019 ◽  
Vol 974 ◽  
pp. 168-174 ◽  
Author(s):  
Ekaterina Victorovna Fomina ◽  
Valery S. Lesovik ◽  
Natalia Ivanovna Kozhukhova ◽  
Anatolii S. Chulenyov

In the framework of development of the transdisciplinary research area «geonics» or «geomimmetics» the term «technogenic matasomatosis in construction material science» was proposed. This work is devoted to study of processes that take place in construction material when buildings management from the point of view of the technogenic metasomatosis theory: adaptation of rocks to varied technogenic conditions. The determination and calculation of coefficient of permeability for fine-aggregate concrete with different density and chemical composition of the filtrate under high-hydrostatic load was accomplished. The method of determination of a mineral basicity using thermodynamic calculation of mineral ionization was applied. It was determined, under these conditions the minerals of calcium and magnium silicates have a higher more basicity and, so, have a higher solubility vs. calcium and magnium carbonates.



2022 ◽  
Vol 17 (4) ◽  
pp. 93-100
Author(s):  
A. A. Rogozhina

Determination of new biomarkers involved in the pathogenesis of ischemic stroke is an extremely important task from the point of view of identifying possible mechanisms for preventing the occurrence of an acute event, better diagnosis, and influencing the stages of pathogenesis to reduce the inflammatory focus. Sphingolipids belong to new biomarkers of atherosclerosis, which are involved in inflammation, apoptosis, and ischemia. The widespread introduction of mass spectrometry has made it possible to study sphingolipids in more detail. This review aims to summarize the available data on the role of sphingolipids in ischemic stroke.



2020 ◽  
Vol 32 ◽  
pp. 89-116
Author(s):  
Wiesław Banyś

The presented text will touch on the issue too often neglected in studies of pragmatemes, namely the role of prosody in determining what is a pragmateme and what is not. First, the analyses of prosody and of its role in the determination and functioning of various linguistic phenomena (informational structure of the sentence, presupposition, relative propositions) are reviewed, then the definitions of pragmatems by I. Mel’čuk and X. Blanco with S. Mejri are presented, to move on, at the end, to analyse the role of prosody in the determination of the pragmatematical or non-pragmatematical status of constructions through analyses of cases of pragmatemes that should not be qualified in this way without precise indications on prosody. The point is that even if mistakes are made in the spelling or transcription, the actual pronunciation of the constructions in a concrete enunciation situation must be suitable for the construction in question to function as a pragmateme. It is a suitable intonation which, with the appropriate context, makes construction a pragmateme — the intonation is thus truly (co-)generating the meaning of the construction — otherwise the construction would have its literal meaning. This finding also invites us to make a detailed study, from this point of view, of as many of the expressions qualified as pragmatems as possible, and to include the decisive prosodic information in dictionary entries of this type of expression.



Author(s):  
N.V. Belov ◽  
U.I. Papiashwili ◽  
B.E. Yudovich

It has been almost universally adopted that dissolution of solids proceeds with development of uniform, continuous frontiers of reaction.However this point of view is doubtful / 1 /. E.g. we have proved the active role of the block (grain) boundaries in the main phases of cement, these boundaries being the areas of hydrate phases' nucleation / 2 /. It has brought to the supposition that the dissolution frontier of cement particles in water is discrete. It seems also probable that the dissolution proceeds through the channels, which serve both for the liquid phase movement and for the drainage of the incongruant solution products. These channels can be appeared along the block boundaries.In order to demonsrate it, we have offered the method of phase-contrast impregnation of the hardened cement paste with the solution of methyl metacrylahe and benzoyl peroxide. The viscosity of this solution is equal to that of water.



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