413 research outputs found
On some research guidelines initiated by articles of Academician I.N. Kovalenko
No full textНаведено огляд деяких напрямків досліджень, які були ініційовані І.М. Коваленком та знайшли відображення у сумісних роботах з автором даної статті. До них відносяться: метод «штучних» моментів регенерації, асимптотична нечутливість, метод Монте-Карло та методи зменшення дисперсії оцінок, принцип монотонних відмов.A review of some research guidelines which were initiated by I.N. Kovalenko and used in joint articles with the author is given. These are: method of «artificial» regeneration moments, asymptotic insensitivity, Monte Carlo method and variance reduction methods, principle of monotone failures
События и деятели художественной культуры России петровской эпохи в документах Берги Мануфактур коллегии
No full textFor the study of the history of art culture brought poorly studied the source of the protocols Berg and the Collegium of Manufactories. Fully presented the data about painters (masters and students) in 1720, selectively – for other years. Provides information on the activities of working in Russia of the French artist. Material concerns created works of art, places, conditions of and remuneration for the work, work organization and training, interaction between the institutions, speakers customers and curators of the project.Для изучения истории художественной культуры привлечен малоизученный источник – протоколы Берги Мануфактур коллегии. Полностью представлены данные о живописцах (мастерах и учениках) за 1720 г., выборочно – за другие годы. Приведены сведения о деятельности работавшего в России французского художника Ф. Пильмана. Материал касается создававшихся произведений искусства, мест, условий и оплаты работы, организации труда и обучения, взаимодействия учреждений, выступавших заказчиками и кураторами проектов
Университетский музей как культурный феномен
No full textThis article is a cultural analysis of the features of the University Museum. The authors propose to consider the phenomenon in dynamics. The characteristic features of the evolution of the University Museum are considered, the most characteristic examples of acquisition and use of collections in the Museum of the University are shown. The analysis of this study suggests that the Museum of the University is an important structural element of the University socio-cultural environment. The University Museum promotes the development of different branches of knowledge at the University, increases the visibility of the educational process and performs its inherent representative functions. The methodological basis of the research is the cultural approach, which allows to consider the key issues related to the study of the University Museum as a cultural phenomenon. It is noted that the University Museum of the University today should be innovative approach to its activities. Continuing to be engaged in acquisition, forming personal funds of University professors, collecting complexes of original monuments of history and culture, the Museum today has to find new forms of participation in educational process, and also to look for innovative ways of formation of University identity, involving in process of Museum communication the maximum number of representatives of University community. The authors come to the conclusion that at the beginning of the XX1 century in many universities increased attention to the University Museum, draws attention to the ways of representation and Museum technology used by the Museum.Целью данной статьи является культурологический анализ особенностей университетского музея. Авторами предлагается рассмотрение рассматриваемого феномена в динамике. Рассматриваются характерные особенности эволюции музея университета, показаны наиболее характерные примеры комплектования и использования коллекций в музее вуза. Анализ данного исследования позволяет предположить, что музей вуза является важным структурным элементом университетской социокультурной среды. Вузовский музей способствующий развитию разных отраслей знания в университете, повышает наглядность учебного процесса и выполняет присущие ему репрезентативные функции. Методологической основой исследования является культурологический подход, позволяющий наиболее полно рассмотреть ключевые вопросы, связанные с исследованием университетского музея как культурного феномена. Отмечается, что университетский музей вуза сегодня должен новаторски подходить к своей деятельности. Продолжая заниматься комплектованием, формируя личные фонды университетской профессуры, собирая комплексы подлинных памятников истории и культуры, музей сегодня должен находить новые формы участия в учебном процессе, а также искать инновационные способы формирования университетской идентичности, вовлекая в процесс музейной коммуникации максимальное количество представителей вузовского сообщества. Авторы приходят к выводу о том, что в начале XX1 века во многих университетах усиливается внимание к вузовскому музею, обращается внимание на способы репрезентации и музейные технологии, применяемые музеем
Проектный метод в преподавании гуманитарных дисциплин в вузах: особенности и способы практической реализации
No full textThe article actualizes the problems of the implementation of the project method in teaching humanities at a university. The goal was to review the educational potential of the project methodology in the practice of humanitarian disciplines of the university, as well as to identify the features of the method and methods for its implementation within the specified disciplines. The objectives are to justify the relevance of the project method in the training process; to identify the features of the project method; to consider the stages of implementation of the project technology; to identify the conditions and ways of implementing the project method in the teaching of humanities at the university. The article used the methods of theoretical, content analysis, systematization. The results of the research: methodological aspects of the implementation of the project method were identified, the characteristics of its use in teaching humanities were systematized, and the conditions for the successful implementation of the project methodology at the university were identified.В статье актуализируется проблематика реализации проектного метода в преподавании гуманитарных дисциплин в вузе. Целью явилось рассмотрение образовательного потенциала проектной методологии в практике гуманитарных дисциплин вуза, а также выявление особенностей метода и способов его реализации в рамках указанных дисциплин. Задачи: обосновать актуальность проектного метода в процессе профессиональной подготовки; выявить особенности проектного метода; рассмотреть этапы реализации проектной технологии; выявить условия и способы реализации проектного метода в преподавании гуманитарных дисциплин в вузе. В статье использованы методы теоретического, контент-анализа, систематизации. Результаты исследования: выявлены методологические аспекты реализации проектного метода, систематизированы особенности его использования в преподавании гуманитарных дисциплин, выявлены условия успешной реализации проектной методологии в вузе
UNIVERSITY MUSEUM AS A STRUCTURAL ELEMENT OF THE SOCIAL AND CULTURAL ENVIRONMENT OF THE UNIVERSITY
No full textThe article deals with the phenomenon of the University Museum as an important structural element of the socio-cultural environment of the University. The results of research aimed at understanding the structure, functions and main characteristics of the University Museum are presented. To achieve the objectives of the study, a qualitative research strategy was used, including both hermeneutic method and descriptive-interpretative analysis. It is shown that the development of museums of Russian universities is characterized by the desire for consistency. Consistency is manifested in the work to ensure the completeness of collections, in the search for optimal forms and methods of stock and exhibition work. The authors analyze the role in the development of University museums of major research scientists-founders of scientific schools, some of which, in addition to the main activity, headed the University museums. Museum collections and the Museum space itself served as the basis for scientific research, in which students participated. The features of functioning of the University Museum as a special Institute of social memory are analyzed and its differences from the state Museum are shown. The feature of special methods of scientific and cultural information transfer in the context of Museum space is considered. The analysis and interpretation of the research material showed that many museums of universities, preserving educational and scientific functions, have become a repository of historical information about the history of the University, recorded in documentary and material sources. The involvement of students in Museum activities gives young people the opportunity to form a sense of spiritual involvement in the "Alma mater", continuity in relation to previous generations and responsibility for future generations. The results of the study can be recommended as practical Museum workers and scientists studying museology
Counting sequences, Gray codes and lexicodes
No full textA counting sequence of length n is a list of all 2^n binary n-tuples (binary codewords of length n). The number of bit positions where two codewords differ is called the Hamming distance of these two codewords. The average Hamming distance of a counting sequence of length n is defined as the average Hamming distance between the 2^n pairs of successive codewords, including the pair of the last and the first codeword. A counting sequence of length n which has average Hamming distance equal to n-1/2 is called a maximum counting sequence. The number of bit changes in bit position i, in a counting sequence of length n is called the transition count of bit position i. If a counting sequence of length n has the property that the difference between any two bit positions is at most 2, the sequence is called balanced. We introduce a construction for balanced maximum counting sequences for every codeword length n>0, n not equal 4, which implies a proof of a longstanding conjecture of Robinson and Cohn in [IEEE Trans. Computers, vol. C-30, pp. 17-23, 1981]. A counting sequence of length n which has the property that any two successive codewords in the list have the same Hamming distance is called uniform. We introduce a heuristic construction how to construct uniform sequences. This construction occasionally produces balanced sequences, and so gives a partial answer to another conjecture of Robinson and Cohn dealing with the existence of balanced uniform counting sequences [IEEE Trans. Computers, vol. C-30, pp. 17-23, 1981]. A cyclic Gray code of length n is a uniform sequence of length n with Hamming distance exactly one between any two successive codewords. We introduce a construction of Gray codes satisfying the property that either all transition counts are equal to the same power of two, or are all equal to two consecutive powers of two, which proves the conjecture of Wagner and West in [Congressus Numerantium, vol. 80, pp. 217-223, 1991]. Furthermore, we also introduce a construction of Gray codes of length n>0, n not equal 3, inducing the complete graph K_n, thus providing the complete answer for an open problem suggested by Wilmer and Ernst in [Discrete Mathematics, vol. 257, pp. 585-598, 2002]. Moreover, we derive the separability function of the reflected N-ary Gray codes. We also introduce a simple method for the construction of cyclic N-ary Gray codes, and for the construction of constant weight N-ary Gray codes. The separability functions of these codes are derived as well. In the remaining part of the thesis we present a greedy algorithm for the construction of a large class of linear q-ary lexicodes which generalizes the algorithms in several other papers. By applying this method, one can produce linear lexicodes which cannot be constructed by previous algorithms. Especially, we discuss some interesting properties of self-orthogonal ternary lexicodes.Electrical Engineering, Mathematics and Computer Scienc
Coset construction of a D-brane gauge field
No full textAbstractD-branes have a world-volume U(1) gauge field A whose field strength F=dA gives rise to a Born–Infeld term in the D-brane action. Supersymmetry and kappa symmetry transformations of A are traditionally inferred by the requirement that the Born–Infeld term is consistent with both supersymmetry and kappa symmetry of the D-brane action. In this paper, we show that integrability of the assigned supersymmetry transformations leads to an extension of the standard supersymmetry algebra that includes a fermionic central charge. We construct a superspace one-form on an enlarged superspace related by a coset construction to this centrally extended algebra whose supersymmetry and kappa symmetry transformations are derived, rather than inferred. It is shown that under pullback, these transformations are of the form expected for the D-brane U(1) gauge field. We relate these results to manifestly supersymmetric approaches to construction of D-brane actions
Extended nodal analysis
No full textThis paper presents an extension to the popular nodal and modified nodal formulation methods that allows elements whose characteristic functions include controlling variables, in addition to voltages and currents, other variables, such as charge, flux, and other physical parameters, to be included in the circuit equation formulation in a straightforward manner. Stamps, similar to nodal and modified nodal circuit element stamps, are developed to include these elements in the circuit matrix equation without the need of deriving equivalent circuit models consisting of interconnections of elements characterized only by currents and voltages, as in the current practice. The method is applied to derive circuit stamps of memristive, memcapacitive, meminductive, and other complex device models. The method reduces the size of the overall circuit matrix and allows easy model evaluation and linearization during the circuit iterative solution process. © 2011 IEEE.Biolek D, 2009, 2009 EUROPEAN CONFERENCE ON CIRCUIT THEORY AND DESIGN, VOLS 1 AND 2, P249, DOI 10.1109-ECCTD.2009.5274934; Biolek D, 2011, ANALOG INTEGR CIRC S, V66, P129, DOI 10.1007-s10470-010-9505-5; Biolek D, 2010, ELECTRON LETT, V46, P520, DOI 10.1049-el.2010.0358; Biolek D, 2010, ELECTRON LETT, V46, P1428, DOI 10.1049-el.2010.2309; Biolek D, 2010, PROCEEDINGS OF THE 2010 IEEE ASIA PACIFIC CONFERENCE ON CIRCUIT AND SYSTEM (APCCAS), P800, DOI 10.1109-APCCAS.2010.5774993; CHUA LO, 1971, IEEE T CIRCUITS SYST, VCT18, P507, DOI 10.1109-TCT.1971.1083337; CHUA LO, 1976, P IEEE, V64, P209, DOI 10.1109-PROC.1976.10092; Desoer Charies A., 1969, BASIC CIRCUIT THEORY; Di Ventra M, 2009, P IEEE, V97, P1717, DOI 10.1109-JPROC.2009.2021077; Gear CW, 1971, NUMERICAL INITIAL VA; HACHTEL GD, 1971, IEEE T CIRCUITS SYST, VCT18, P101, DOI 10.1109-TCT.1971.1083223; HAJJ I, 1985, COMPUTATIONAL METHOD; HO CW, 1975, IEEE T CIRCUITS SYST, VCA22, P504; Joglekar YN, 2009, EUR J PHYS, V30, P661, DOI 10.1088-0143-0807-30-4-001; Kavehei O, 2010, P ROY SOC A-MATH PHY, V466, P2175, DOI 10.1098-rspa.2009.0553; Lambert J.D., 1991, NUMERICAL METHODS OR; Najm F. N., 2010, CIRCUIT SIMULATION; Pillage L., 1995, ELECT CIRCUIT SYSTEM; Rak A, 2010, IEEE T COMPUT AID D, V29, P632, DOI 10.1109-TCAD.2010.2042900; Shin S, 2010, IEEE T COMPUT AID D, V29, P590, DOI 10.1109-TCAD.2010.2042891; Strukov DB, 2008, NATURE, V453, P80, DOI 10.1038-nature06932; VLACH J, 1994, METHODS CIRCUIT ANAL0
Israelitische Festpredigten und Casualreden
No full texthrsg. von J. Maier, I. N. Mannheimer, G. SalomonAus der Sammlung des Leo Baeck Institute, digitalisiert in Kooperation mit dem Center for Jewish History, NYA note in the first "Heft" claims the writings of I.N. Mannheimer will appear in later volumes. Although I.N. Mannheimer's name appears on the title page, the table of contents does not list him as an author of any of the essays. [Notice of Center for Jewish History, NY
Computer Tomography: Image reconstruction in the presence of noise
No full textIn this research, a stochastic model for attenuation in Computer Tomography is developed. This model gives rise to the idea of using path dependent variance of the measurements (instead of constant variance) to improve image reconstruction. The distribution of the measurements in this model is determined and a difference with the current literature is found, which leads to a refinement of the noise or measurement errors in the model. To use the information about the variance of the measurements in the image reconstruction, a numerical model is considered in which a discretization is made of the tomographic image that has to be reconstructed, i.e., the unknown attenuation coefficients. Incorporating weights to reflect the relation between the area that is traversed by an X-ray beam and the entire area of a pixel in the grid results in a linear system of equations. Because the measurements are not exact, noise is added to this linear system of equations, which leads to a perturbed problem. A transformation of the measurements is needed to obtain the desired linear system of equations. The Delta Method is used for this purpose. Another method used for the transformation of stochastic models, variance stabilization, is briefly considered. The log-likelihood of the unknown attenuation coefficients is determined under different assumptions for the mean and variance of the measurements. A connection is made between the log-likelihood and the (weighted) Least-Squares Estimation, leading to different ideas for the adjustment of the current reconstruction algorithm. Several new reconstruction algorithms are developed to improve the image reconstruction by using the path dependent variance of the noise. Most of these new algorithms result in a better reconstruction than the current algorithm, but a problem is found when the convergence of the iterative algorithms is considered. In addition to the relative error, the log-likelihood function and the weighted sum of squared errors are used to investigate the convergence of the iterative reconstruction algorithms. Relaxation is incorporated into the iterative reconstruction algorithm to improve the convergence. A slightly better convergence is obtained, but progress could be made if a convergent iterative algorithm is found.Applied mathematicsElectrical Engineering, Mathematics and Computer Scienc
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