scholarly journals Quantum diffusion

Open Physics ◽  
2004 ◽  
Vol 2 (3) ◽  
Author(s):  
Dimitar Pushkarov

AbstractBasic ideas and results which characterize quantum diffusion of defects in quantum crystals like solid helium as a new phenomenon are presented. Quantum effects in such media lead to a delocalization of point defects (vacancies, impurities etc.) and they turn into quasiparticles of a new type—defectons, which are characterized not by their position in the crystal lattice but by their quasimomentum and dispersion law. Defecton-defecton and defecton-phonon scattering are considered and an interpolation formula for the diffusion coefficient valid in all interesting temperature and concentration regions is presented. A comparison with the experimental data is made. Some alternative points of view are discussed in detail and the inconsistency of the Kisvarsanyi-Sullivan theory is shown.

Author(s):  
M.B. Rarenko ◽  

The article considers the story by Henry James (1843 – 1916) «The Turn of the Screw» (1898 – first edition, 1908 – second edition) in connection with the emergence of a new type of narrator in the writer's late prose. The worldview and creative method of H. James are formed under the influence of the philosophy of pragmatism, which became widespread at the turn of the XIX-XX centuries thanks to the works of the writer's elder brother, the philosopher William James (1842 – 1910). The core of pragmatism is the pluralistic concept of William James based on the assumption that knowledge can be realized from very limited, incomplete, and inadequate «points of view» and this leads to the statement that the absolute truth is essentially unknowable. The epistemological statements of William James's theory is that the content of knowledge is entirely determined by the installation of consciousness, and the content of the truth in this case depends on the goals and experience of the human, i.e. the central starting point is the consciousness of the person. Henry James not only creates works of art, but also sets out in detail the principles of his work both on the pages of fiction works of small and large prose, putting them in the mouths of their characters – representatives of the world of art, and in the prefaces to his works of fiction, as well as in critical works.


2001 ◽  
Vol 117 (9) ◽  
pp. 561-564
Author(s):  
M. Polini ◽  
G. Sica ◽  
M.P. Tosi

2014 ◽  
Vol 2014 ◽  
pp. 1-24 ◽  
Author(s):  
Ryotaro Kamimura

We attempt to demonstrate the effectiveness of multiple points of view toward neural networks. By restricting ourselves to two points of view of a neuron, we propose a new type of information-theoretic method called “cooperation-controlled learning.” In this method, individual and collective neurons are distinguished from one another, and we suppose that the characteristics of individual and collective neurons are different. To implement individual and collective neurons, we prepare two networks, namely, cooperative and uncooperative networks. The roles of these networks and the roles of individual and collective neurons are controlled by the cooperation parameter. As the parameter is increased, the role of cooperative networks becomes more important in learning, and the characteristics of collective neurons become more dominant. On the other hand, when the parameter is small, individual neurons play a more important role. We applied the method to the automobile and housing data from the machine learning database and examined whether explicit class boundaries could be obtained. Experimental results showed that cooperation-controlled learning, in particular taking into account information on input units, could be used to produce clearer class structure than conventional self-organizing maps.


2010 ◽  
Vol 650 ◽  
pp. 126-131 ◽  
Author(s):  
Hong Fu ◽  
Peng Zhan Ying ◽  
J.L. Cui ◽  
Y.M. Yan ◽  
X.J. Zhang

Solid solution formation is a common and effective way to reduce the lattice thermal conductivity for thermoelectric materials because of additional phonon scattering by point defects and grain boundaries. In the present work we prepared In2Te3–SnTe compounds using a mild solidification technique and evaluated their thermoelectric properties in the temperature range from 318705 K. Measurements reveal that the transport properties are strongly dependent on the chemical composition  In2Te3 content, and lattice thermal conductivity significantly reduces above a minimum In2Te3 concentration, which can possibly be explained by an introduction of the vacancy on the indium sublattice and periodical vacancy planes. The highest thermoelectric figure of merit ZT of 0.19 can be achieved at 705 K, and a big improvement of In2Te3 based alloys would be expected if a proper optimization to the chemical compositions and structures were made.


1937 ◽  
Vol 2 (3) ◽  
pp. 97-112 ◽  
Author(s):  
Carl G. Hempel

1. The problem. The aim of the following considerations is to introduce a new type of non-Aristotelian logic by generalizing the truth-table methods so far employed for establishing non-Aristotelian sentential calculi. We shall expound the intended generalization by applying it to the particular set of pluri-valued systems introduced by J. Łukasiewicz. One will remark that the points of view illustrated by this example may serve to generalize quite analogously any other plurivalued systems, such as those originated by E. L. Post, by H. Reichenbach, and by others.2. J. Łukasiewicz's plurivalued systems of sentential logic. First of all, we consider briefly the structure of the Łukasiewicz systems themselves.As to the symbolic notation in which to represent those systems, we make the following agreements: For representing the expressions of the (two- or plurivalued) calculus of sentences, we make use of the Principia mathematica symbolism; however, we employ brackets instead of dots. We call the small italic letters “p”, “q”, “r”, … sentential variables or elementary sentences, and employ the term “sentence” as a general designation of both elementary sentences and the composites made up of elementary sentences and connective symbols (“~”, “ν” “.”, “⊃” “≡”).Now, the different possible sentences (or, properly speaking, the different possible shapes of sentences, such as “p”, “p∨q”, “~p.(q∨ r)”, etc.) are the objects to which truth-values are ascribed; and just as in every other case one wants a designation for an object in order to be able to speak of it, we want now a system of designations for the sentences with which we are going to deal in our truth-table considerations.


Author(s):  
Володимир Вікторович Чалапко

Problem setting. One of the modern forms of violence that requires careful analysis is hybrid war. The events of recent decades have shown that hybrid war is not only a scientific concept, but also a reality today. The phenomenon of hybrid war requires a comprehensive study from both theoretical and practical points of view. Recent research and publications analysis. The problem of hybrid wars is reflected in the scientific works of both foreign and domestic scientists. Among foreign scientists, research in this direction was carried out by R. Glenn, D. Lasik, M. McLuhan, F. Hoffman, who focused on determining the characteristics of hybrid wars in comparison with classical wars, analyzed the strategies and tactical algorithms for conducting such wars, and focused on poly-straightness and multimodality of this type of violence. On the other hand, domestic scientists, in particular V. Kravchenko, focus on the fact that hybrid war is not an absolutely new phenomenon in world history and gives a number of examples of manifestations of "hybridity" in wars of the past. In turn, M. Senchenko, analyzing hybrid war as an integral phenomenon, defines its information component as the main one which the strategy of this type of war is built around. Paper objective. The purpose of this work is to define the essential characteristics of hybrid war as a new form of violence. Paper main body. The understanding of the essence and content of hybrid warfare in the scientific literature is presented by a number of points of view that complement the understanding of this complex and little-studied phenomenon. As you know, the concept of "hybrid war" was introduced into scientific circulation by the American scientist M. McLuhan. Domestic scientists generally understand hybrid war as military actions that are carried out by combining militaristic, quasi-militaristic, diplomatic, informational, economic and other means in order to achieve strategic political goals. The specificity of this combination lies in the fact that each of the military and non-military methods of conducting a hybrid conflict is used for military purposes and is used as a weapon. The researchers note that hybrid warfare is not a fundamentally new type of violence, and its elements have been used by opponents in wars throughout the entire existence of mankind. "Hybridity" in this sense is understood as the complex application of various means and strategies of warfare – from information-psychological to purely military ones. Conclusions of the research.  Thus, hybrid war as a modern form of violence is aimed primarily not at the seizure of territories, but at mastering the public consciousness of the target country and at dominating its information and cultural field. The victory on the "information and cultural front" provides further economic and political dividends for the initiator of the hybrid war.


2018 ◽  
Vol 212 (1) ◽  
pp. 211-240
Author(s):  
Assist. Prof. Dr. Khamis Abdullah Al-Timimy. ◽  
Dr. Haider Shnawa Faisal Al-zaidi.

The Paper has tackled the pivotal meaning, its relationship with derivation, and its types. The paper starts with defining the pivotal meaning and the ways of its formation, then mentioning the difference between the pivotal meaning and central meaning with revealing the most significant points of view anciently and recently. The researcher has defined derivation mentioning the essential views that have said about it with providing on adequate exposure to Mustafawi's remarks concerning derivation and hid unique achievement in this field i.e. adding a new type of derivation which he calls "extractive derivation". The researcher has also tackled about the relationship of the pivotal meaning with types of derivation represented by: small, big, the biggest, and magnificent. Keeping in mind that derivation is a linguistic procedure which cannot be restricted in specific limits in addition to the fact that its relation with the pivotal meaning is divergent depending on the type of derivation. 


1978 ◽  
Vol 39 (C6) ◽  
pp. C6-119-C6-120
Author(s):  
B. N. Eselson ◽  
V. A. Mikheev ◽  
V. N. Grigoriev ◽  
N.P. Mikhin

1976 ◽  
Vol 120 (9) ◽  
pp. 134
Author(s):  
B.N. Esel'son ◽  
V.N. Grigor'ev ◽  
V.A. Mikheev

Sign in / Sign up

Export Citation Format

Share Document