592 research outputs found
Spin: from basic symmetries to quantum optimal control
No full textThis monograph is a fundamental reference for scientists and engineers who encounter spin processes in their work. The author, Ilya Kuprov, derives the concept of spin from basic symmetries and gives an overview of theoretical and computational aspects of spin dynamics: from Dirac equation and spin Hamiltonian, through coherent evolution and relaxation theories, to quantum optimal control, and all the way to practical implementation advice for parallel computers
Vladimir Mayakovsky as “a Singing Ilya Muromets”: “Karacharovo” by Viktor Sosnora
No full textThe article analyzes the poem by Viktor Sosnora (1936–2019) “Karacharovo” (1959). The poet entered the world of literature with a book of poems on Old Russia (“Horsemen”). He knew well not only written monuments, but also folklore, was well-read in folklore studies. At the same time, Sosnora felt himself the heir to Russian futurism. The main characters of the poem – the epic hero Ilya Muromets and the poet Vladimir Mayakovsky–are hidden through the figure of silence. Their images are revealed by the analysis of the reminiscent plan of the poem. Forming it, Sosnora “re-fantasizes” the events described in the works of different epochs, “updating” them for the modern reader. Besides, turning to cultural (Karacharovo is the native village of Ilya Muromets) and the reminiscent (a reference to the well-known lines of Mayakovsky) memory, Sosnora builds the past and the future in a historical perspective. The parallel between the bogatyr and the poet, Karacharovo and Baghdadi, most likely goes back to Viktor Shklovsky’s book “On Mayakovsky” (1940), and through it to the forgotten, but known to Shklovsky review of Roman Gul on Mayakovsky’s poems (1923) published in the Berlin newspaper “Nakanune”. If for Mayakovsky the epic time is in the past, for Sosnora it has not yet come; Ilya Muromets has yet to be born in Karacharovo. The tavern motif introduces the memory of the poetry and the fate of Sergei Yesenin into the associative field of the poem. Turning to the Оld Russian writings and folklore, the young Sosnora solved the problem of deep, not superficial, inheritance of the traditions of the Russian futurism (Vladimir Mayakovsky, Velimir Khlebnikov, Nikolai Aseev). The article also considers the rhythmics and composition of the poem in detail. It reveals the specificity of the tactician “Karacharovo” based in the main part of the poem on paean III (4 stanzas), and in the last stanza sounding anapestic. A rich system of alliterations and other methods of organizing the poem, such as original graphics, hyphenation, open and closed syllables in rhyme positions, is described. “Implicit” semantic parallels with other poems of “Horsemen” (“Rogneda”, “Kaliki”) are noted. “Reticence”, “figure of silence”, “reservation”, and “hints” become a means of involving into the creative process of the reader, who, the same as the author, has the right to “re-fantasize” the poetic text
About My War-Time Childhood
Full text linkA book wouldn't be enough just to mention Ilya Nikolaevich Lezhava's creative works and achievements. We’ll certainly write it. Upon his graduation from MArchI he became one of NER ideologists… Lezhava is the author of dozens of books and articles in famous magazines, including the iconic French magazine L'Architecture D'Aujourd'hui. PROJECT BAIKAL is proud to be among them: except Sibstream, Ilya Georgievich has published several articles about classics of the XX century (PB 46 quarters; PB 49 nature in the city; PB 53 cui prodest). His story about his war-time childhood submitted to PB contains everything that can be expected from high literature: liveliness, frank intonation, emotionality and a gift of speaking
Fokker-Planck formalism in magnetic resonance simulations
No full textThis paper presents an overview of the Fokker-Planck formalism for non-biological magnetic resonance simulations, describes its existing applications and proposes some novel ones. The most attractive feature of Fokker-Planck theory compared to the commonly used Liouville - von Neumann equation is that, for all relevant types of spatial dynamics (spinning, diffusion, stationary flow, etc.), the corresponding Fokker-Planck Hamiltonian is time-independent. Many difficult NMR, EPR and MRI simulation problems (multiple rotation NMR, ultrafast NMR, gradient-based zero-quantum filters, diffusion and flow NMR, off-resonance soft microwave pulses in EPR, spin-spin coupling effects in MRI, etc.) are simplified significantly in Fokker-Planck space. The paper also summarises the author’s experiences with writing and using the corresponding modules of the Spinach library – the methods described below have enabled a large variety of simulations previously considered too complicated for routine practical use
Remembering Ilya Moiseevich Smolar
Full text linkOn April 10, 2018, the Department of urban planning of the Russian Academy of architecture and construction Sciences held a meeting "Remembering Smolar", the sacred 12 February 90th anniversary of the birth of doctor of architecture, Professor, full member of RAACS Ilya Moiseevich Smolar, who left our world 10 years ago. The initiator of the meeting was a student of Ilia Moiseevich, who successfully defended his PhD thesis, now the chief architect of Moscow Institute "Giprogor" Alexander Albertovich Kolesnikov. The program of the meeting provided to recall the scientific, pedagogical and human qualities of I. M. Smolar, as well as the discussion of modern scientific and legal issues of our urban development. The author provides the reader with an opportunity to get acquainted with the content of his speech at this meeting, dedicated to the human qualities of the Master
Topics in strongly correlated electrons
No full textThe thesis is a collection of three topics connected together by the common themes of strong interactions, magnetism and quantum phases, such as the Aharonov-Bohm or Berry phase.
The first part of the present dissertation discusses the possibility of examining microscopic origins of magnetism in strongly interacting systems by exploiting the setting of ultra-cold atomic gases in optical lattices. We discuss signatures of correlation in the trap, and propose an experiment to measure the phase diagram of itinerant magnetism directly.
The second part focuses on the exotic phase of matter exhibiting the Fractional Quantum Hall Effect, which emerges when interacting particles are placed in a very strong magnetic field. We propose a trial ground state wave-function and prove that it is the unique highest density ground state of a well-motivated pseudo-potential Hamiltonian. The exchange statistics of quasiparticles are shown to be exotic, and overlaps with results of exact diagonalization are
also discussed.
The final part of the thesis studies frustrated magnetic systems, in which competing forces cannot not be satisfied simultaneously, doped with electrons. The interplay of frustration and itinerant behavior generates Berry phases associated with charge transport. We study the effects of these phases on electronic behavior, as well as the effect electrons have on the underlying
magnetic textures. In the quasi-classical limit, we conjecture a field-driven metal-insulator transition, and discuss persistent currents arising in ground states selected by the presence of charge. In the quantum regime we derive the full Hamiltonian and discuss small fluctuations about the classical results.Ph.D.Includes bibliographical references.by Ilya Berdniko
HOW DREAMS AND PLANS CAN INTERFERE WITH LOVE: ILYA OBLOMOV AND OLGA ILYINSKAYA IN THE NOVEL BY I. A. GONCHAROV
No full textThe paper offers a guidance plan of the lesson based on the novel «Oblomov» by Ivan Goncharov. The lesson, as well as the whole system of lessons, is built on the problem dialogue technology. In the course of the lesson the second and the third parts of the novel are analyzed in detail, the traits of characters of Olga Ilinskaya and Ilya Ilyich Oblomov are scrutinized. The study of the epic is based on the analysis of the main questions: Why does the protagonist refuse of living a full-fledged life? Why does the author lead a protagonist through the test of love? How do the images of Oblomov and Stolz relate to each other? Frontal teaching and teamwork are used at the lesson which makes it possible to study a large amount of literary material. Discussion of these issues teaches the students to prove their point of view, to compare different ideas and phenomena, to generalize and draw conclusions
Exploring Pre-service Language Teachers⿿ Perceptions and Actual Practices of Giving Feedback in Micro-teaching
No full textAbstractFeedback has considerably been acknowledged as a significant component of language teaching. Although there are several studies on the effectiveness of giving feedback to pre-service language teachers to improve their teaching practices by their instructors or their peers, the actual feedback provided by them during their micro-teaching practices has not received adequate attention. Therefore, the aim is twofold: to investigate the perceptions of pre-service language teachers regarding their oral feedback providing practices during their micro-teaching implementations, and to carry out content analysis of their micro-teaching practices to determine the frequency and variety of the feedback provided by them during their micro-teaching practices. The study was carried out with 40 pre-service language teachers at Sakarya University. An open ended questionnaire with eight questions was employed in order to determine pre-service language teachers⿿ perceptions. For the actual practices, pre-service language teachers were asked to video record their micro-teachings, and two researchers watched them. The findings of the study have not been finalized yet. With the current study, similarities and differences between pre-service language teachers⿿ perceptions and their actual practices will be investigated
Ilya Ilyich Mechnikov: life and work
No full textOn May 15, 2020, we celebrated the 175th anniversary of the Ilya Metchnikoff, the author of the hypothesis about parenchymella, the father of cellular immunology and inflammation theory, founder of gerontology, aging and longevity science. The article discusses the main milestones in the life and scientific work of Ilea Metchnikoff. Ilya Metchnikoff working originally in Russia, later in Italy, and then at the Pasteur Institute in Paris. His initial observations on phagocytic cells were made in the marine biology laboratories in Messina on starfish. Ilya Ilyich, as a result of observations of intracellular digestion in sponges, coelenterates and some flatworms, stretches a thread between phagocytosis and evolution (phagocytella), inflammation, cellular immunity, regeneration and the aging process. This thread is the quintessence of his work. Metchnikoff devoted many years to studying the comparative development of the embryonic layers of lower animals. Ilya Ilyich demonstrated that cnidarians gastrulate by introgression of cells which move from the blastula wall into the interior blastocoel and formed parenchymella or phagocytella. According to Metchnikoff, the hypothetical ancestor of multicellular organisms was similar to phagocytella. Metchnikoff is rightly famous for his theories of phagocytosis and inflammation. He proposed that macrophages evolved first to regulate development, and that these function are the stage for their evolution into the cells of innate immunity. It is very importantly to aware that cells and microorganisms according to Metchnikoff were taken up by an active process, involving living, and not only dead organisms The humoral theory claimed that the phagocytes caused the spread of disease in the body and thus would harm the host, rather than defend it, against bacterial invasion. Metchnikoff devoted much of his scientific work to the revealing of the role of phagocytosis in inflammation. He observed diapedesis through vessel walls and aggregation of leukocytes at sites of inflammation. Phagocytosis not only destructs of infectious microbes but uptake of host cells, e.g. erythrocytes, from diverse species as well. More broadly phagocytes are the cells which preserving the integrity and defining the identity of the organism. Metchnikoff believed that the disabilities of old age are the work of phagocytes transformed from defenders against infection into destroyers of tissues by autotoxins derived from putrefactive bacteria residing in the colon. Such degenerative changes, he believed were nearly always premature and potentially prevented by procedures directed against the putrefactive bacteria. Until recently it was generally assumed that phagocytic removal of neurons occurs only after neuronal death. But now it has been convincingly proved that stressed but viable neurons reversibly exposed the "eat-me" signal leading to their phagocytosis by microglia; this neuronal loss was prevented in the absence of microglia. As a result these data breathe life into the Metchnikoff’s ageing theory. Metchnikoff’s hypothesis from the very beginning met with fierce criticisms. It required 25 years of in tense effort to achieve recognition of the phagocytosis theory. This struggle culminated in 1908 with the awarding of the Nobel Priz
О военном детстве
Full text linkA book wouldn't be enough just to mention Ilya Nikolaevich Lezhava's creative works and achievements. We’ll certainly write it. Upon his graduation from MArchI he became one of NER ideologists… Lezhava is the author of dozens of books and articles in famous magazines, including the iconic French magazine L'Architecture D'Aujourd'hui. PROJECT BAIKAL is proud to be among them: except Sibstream, Ilya Georgievich has published several articles about classics of the XX century (PB 46 quarters; PB 49 nature in the city; PB 53 cui prodest). His story about his war-time childhood submitted to PB contains everything that can be expected from high literature: liveliness, frank intonation, emotionality and a gift of speaking.Для одного только упоминания о креативных проектах и заслугах Ильи Георгиевича Лежавы не хватило бы и целой книги; она, конечно же, еще будет написана. Уже в год выпуска из МАрхИ он стал одним из идеологов НЭРа... Лежава – автор десятков книг и статей в самых известных журналах, в список которых входит и культовый французский L'Architecture D'Aujourd'hui. ПРОЕКТ БАЙКАЛ был горд, оказавшись в их числе: у нас, помимо Сибстрима, Илья Георгиевич опубликовал несколько статей о классиках ХХ века (ПБ46_кварталы; ПБ49_природа в городе; ПБ53_cui_prodest).В рассказах о военном детстве, присланных И. Г. Лежавой для публикации в ПБ, есть все, чего можно требовать от высокой литературы: «чувство живости», непосредственность интонации, эмоциональность и дар слова
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