445 research outputs found
Disputable Issues in the Russian History of the 16th Century
No full textKnud Rasmussen (1930–1985) was a famous Danish historian, Professor at Institute of Slavic Studies at University of Copenhagen, specialist in medieval Russia, author of a dozen of scientific monographs published in large editions including in Russian. In 1973, he defended his thesis titled “The Livonian crisis of 1554–1561”. According to the list of works published by J. Lind, 13 publications are devoted to the epoch of Ivan the Terrible. This article, published for the first time, is presented in the form of a report at the conference in Hungary. The scientist consistently outlined the main tasks and problems related to the study of Russian history abroad, in particular, in Denmark. He told what plan was built for the team of Danish historians who decided in the early 1970s to prepare a textbook on Russian history in the form of a problem historiographic course for Danish students, and how this plan was implemented. The study of works on Russian history and their systematization helped the team of Danish historians, which included K. Rasmussen, develop a special historiographic method and its principles, which led to developing understanding of the problematic historical field as a whole and placing individual research in it. As a result, a multivolume manual was written; by the time of K. Rasmussen’s speech, 3 volumes were published, covering the period of Russian history from the 17th to the 20th century inclusive. K. Rasmussen worked on preparing a volume on the Russian history of the 16th century. In the second part of his speech (article), the author shared his thoughts on the chosen approach to the assessment of historiography and spoke about the content of this volume, where he outlined the controversial problem of enslaving peasants, discussions on the reasons for backwardness of Russian cities as the basis of Moscow defeats in Livonia, possible ways of Russian revival, on the state and its institutions and on the development of historical events in the field of domestic policy. This volume was published after the death of the author in the same year: Rasmussen Knud. Ruslands historie i det 16. Arhundrede: En forsknings-og kildeoversigt. Kobenhavn, 1985. 161 s. Bibliography about K. Rasmussen: Lind J. Creative Way Knud Rasmussen (on the 10th anniversary of his death) // Archeographic Yearbook for 1995. – Moscow : Nauka, 1995. – P. 160–165; Lind J. H. Knud Rasmussen in memoriam // Jacob Ulfeld. Travel to Russia. – M. : Languages of Slavic culture, 2002. – Р. 17–25; Vozgrin V. E. Knud Rasmussen and Zans Bagger – Danish historians of Russia // Proceedings of the Department of the History of New and Newest Times of St. Petersburg State University. – 2016. – № 16 (2). – Р. 205–219.
The abstract is prepared by Candidate of Sciences (History), Associate Professor N.V. Rybalko
Molecular simulation of simple fluids and polymers in nanoconfinement
No full textPrediction of phase behavior and transport properties of simple fluids and polymers confined to nanoscale pores is important to a wide range of chemical and biochemical engineering processes. A practical approach to investigate nanoscale systems is molecular simulation, specifically Monte Carlo (MC) methods. One of the most challenging problems is the need to calculate chemical potentials in simulated phases. Through the seminal work of Widom, practitioners have a powerful method for calculating chemical potentials. Yet, this method fails for dense and inhomogeneous systems, as well as for complex molecules such as polymers. In this dissertation, the gauge cell MC method, which had previously been successfully applied to confined simple fluids, was employed and extended to investigate nanoscale fluids in several key areas. Firstly, the process of cavitation (the formation and growth of bubbles) during desorption of fluids from nanopores was investigated. The dependence of cavitation pressure on pore size was determined with gauge cell MC calculations of the nucleation barriers correlated with experimental data. Additional computational studies elucidated the role of surface defects and pore connectivity in the formation of cavitation bubbles. Secondly, the gauge cell method was extended to polymers. The method was verified against the literature results and found significantly more efficient. It was used to examine adsorption of polymers in nanopores. These results were applied to model the dynamics of translocation, the act of a polymer threading through a small opening, which is implicated in drug packaging and delivery, and DNA sequencing. Translocation dynamics was studied as diffusion along the free energy landscape. Thirdly, we show how computer simulation of polymer adsorption could shed light on the specifics of polymer chromatography, which is a key tool for the analysis and purification of polymers. The quality of separation depends on the physico-chemical mechanisms of polymer/pore interaction. We considered liquid chromatography at critical conditions, and calculated the dependence of the partition coefficient on chain length. Finally, solvent-gradient chromatography was modeled using a statistical model of polymer adsorption. A model for predicting separation of complex polymers (with functional groups or copolymers) was developed for practical use in chromatographic separations.Ph. D.Includes bibliographical referencesIncludes vitaby Christopher John Rasmusse
Rullende brobygning – mellem folkeskole og gymnasium:Et casestudie under Region Nordjyllands projekter om mønsterbrydning
No full textAnden delrapport fra et følgeforskningsprojekt gennemført for Region Nordjylland. Projektet handler om, hvordan en række projekter, som er bevilget støtte fra Region Nordjyllands uddannelsespulje, kan bidrage til at bryde de gængse uddannelsesmønstre i regionen. Forord v. Palle Rasmusse
Study of thermal neutron capture gamma rays using a lithium-drifted germanium spectrometer / [by] Victor John Orphan [and] Norman C. Rasmussen
No full text"January 1967.""AFCRL-67-0104."Also issued as an Sc. D. thesis by the first author and advised by the second author, MIT, Dept. of Nuclear Engineering, 1967Includes bibliographical references (pages 199-203)Scientific report, interim; January 1967A gamma-ray spectrometer, using a 30 cc coaxial Ge(Li) detector, which can be operated as a pair spectrometer at high energies and in the Compton suppression mode at low energies provides an effective means of obtaining thermal neutron capture gamma spectra over nearly the entire capture gamma energy range. The energy resolution (fwhm) of the spectrometer is approximately 0.5% at 1 MeV and 0.1% at 7 MeV. Capture gamma-ray energies can be determined to an accuracy of about 1 keV. The relatively high efficiency of this spectrometer allows the use of an external neutron beam geometry, which simplifies sample changing. Using a 4096 channel pulse height analyzer, the capture gamma spectrum of an element may be obtained in about one day. Low cross section (order of 0.1 b) elements with many weak intensity gammas may be studied. Over 100 gamma rays have been identified in the spectrum of one such element, Zr. The spectra of Be, Sc, Fe, Ge, and Zr are presented.United States Air Force contract no. AF19 (628)5551Project no. 5620; Task no. 56200
Revolving-field polygon technique for performance prediction of single-phase induction motors
No full textThis paper presents a new analytical technique for improving the performance prediction of single-phase induction motors, especially capacitor motors. The technique uses the split-phase motor electrical equivalent circuit analysis together with electrical and magnetic parameters whose variation is computed from the equivalent balanced polyphase motor, so that the same magnetic circuit analysis can be used for both. (The term split-phase is used to cover motors operating from a single-phase supply but with the phase windings split into two orthogonal windings, one of which may have a capacitor in series with it during running or starting.) The technique accounts for the elliptical envelope of the magnetizing field vector and results in improved precision, since the three-phase electromagnetic model is considered to be more precise than the normal split-phase motor analysis. An important result is the computation of vector polygons of flux density for each section of the magnetic circuit, providing a better basis for core loss prediction. The double-frequency torque ripple is also obtained from the stator magnetomotive force and flux-density polygons. Three different electrical equivalent circuit methods for the split-phase motor (based respectively on the cross-field theory, forward- and backward-revolving fields, and symmetrical components) are evaluated to determine the method best suited for incorporating the variation of the circuit parameters from the polyphase magnetic circuit analysis, and it is discussed how the core losses can be included in these circuits to obtain the best overall performance prediction
Team players against headache: multidisciplinary treatment of primary headaches and medication overuse headache
No full textMultidisciplinary approaches are gaining acceptance in headache treatment. However, there is a lack of scientific data about the efficacy of various strategies and their combinations offered by physiotherapists, physicians, psychologists and headache nurses. Therefore, an international platform for more intense collaboration between these professions and between headache centers is needed. Our aims were to establish closer collaboration and an interchange of knowledge between headache care providers and different disciplines. A scientific session focusing on multidisciplinary headache management was organised at The European Headache and Migraine Trust International Congress (EHMTIC) 2010 in Nice. A summary of the contributions and the discussion is presented. It was concluded that effective multidisciplinary headache treatment can reduce headache frequency and burden of disease, as well as the risk for medication overuse headache. The significant value of physiotherapy, education in headache schools, and implementation of strategies of cognitive behavioural therapy was highlighted and the way paved for future studies and international collaboration
Cultural definitions of emotional problems: impact on problem experience, care seeking, sources of care, and satisfaction with care among Latino community members living in the United States
No full textThe research described in this dissertation explores the impact of cultural definitions of mental health/illness on care-seeking behavior among members of a Latino community living in the United States. Secondary data analysis utilizes survey data from prior research focusing on mental health service needs among Latino community members. The current research is conceptually situated at the juncture of several topics of current interest within sociology. The social construction of mental illness and cultural influences on that construction has gained importance as current topics within the broader sociological rubric of culture and cognition. The research also addresses challenges confronting mental health service providers created by a rapidly growing and increasingly diverse American population requiring appropriate cross-cultural approaches to meet their mental health service needs. Qualitative data presented in this dissertation illuminate several key concerns regarding the Latino community and community members’ recognition of, and reaction to, symptoms of mental disorder. These results underscore how Latino community members conceptualize emotional/mental problems in ways that differ from members of the majority Non-Latino White population living in the U.S. Quantitative analyses of the impact of demographic variables on Latino community members’ reports of alternative beliefs about the causes of emotional/mental problems show that three of the variables (age, education, and time living in U.S.) are significant predictors of subjects’ alternative explanations for the cause of emotional/mental problems. Analyses of the impact of Latino community members’ causal definition of emotional/mental problems also show significant relationships between the definition and Latino community members’ perceptions and behaviors related to mental disorder. I discuss the ‘Latino Paradox’ and propose an alternative explanation based on community members’ shared cultural constructs regarding mental health and illness for the apparently lower rate of mental disorder among recently arrived Latino immigrants. I offer recommendations suggested by my research findings that relate to mental health services for Latino community members, and for additional research topics.Ph.D.Includes bibliographical referencesIncludes vitaby Frederick O. Rasmusse
Texas Adopts the “Subordination” Rule to Solve Circular Priority Disputes Involving Personal Property: ITT Diversified Credit Corp. v. First City Capital Corp.
No full textExamines the predicate for and implications of the recent Texas Supreme Court decision in ITT Diversified Credit Corp. v. First City Capital Corp., in which the Court established the subordination rule as its method for solving circular priority disputes involving personal property. The author gives a detailed explanation of circular priority systems, describes the various contexts in which circular priority problems may arise, and details several approaches courts have taken to deal with disputes arising under circular priority. The article closes with a brief history of the ways in which Texas courts have historically dealt with these problems and the consequences of the Court’s holding in ITT Diversified
Multigrid approach to solving the long transportation problem on a regular grid in cost space
No full textMultigrid methods were developed to solve partial differential equations. Research has shown that these methods are applicable to a broader range of problems. This thesis investigates the application of multigrid techniques to minimal cost flow problems, specifically the long transportation problem. This research shows that multigrid techniques can be successfully applied to large-scale long transportation problems posed on a three- dimensional, regular grid in cost space. A V-cycle algorithm is developed for the long transportation problem. Analogies to the multigrid components of restriction, interpolation and relaxation are detailed. Performance of the algorithm is discussed, and computational cost is analyzed. Future research is likely to include the development of more sophisticated restriction and interpolation schemes to provide integer-valued flows, and the development of a method to map an irregularly spaced problem to a regular grid, and to map the regular grid solution back to the original problem domain.Approved for public release; distribution is unlimited.Lieutenant, United States Navyhttp://archive.org/details/multigridpproach109453977
PILCO: A Model-Based and Data-Efficient Approach to Policy Search
No full text04.07.13 KB. Ok to add accepted version to Spiral. Authors retain copyright.In this paper, we introduce PILCO, a practical, data-efficient model-based policy search method. PILCO reduces model bias, one of the key problems of model-based reinforcement learning, in a principled way. By learning a probabilistic dynamics model and explicitly incorporating model uncertainty into long-term planning, PILCO can cope with very little data and facilitates learning from scratch in only a few trials. Policy evaluation is performed in closed form using state-of-the-art approximate inference. Furthermore, policy gradients are computed analytically for policy improvement. We report unprecedented learning efficiency on challenging and high-dimensional control tasks. Copyright 2011 by the author(s)/owner(s)
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