76 research outputs found
Improving exoskeleton brace design: Alleviating misalignment and parasitic forces
No full textThis article presents a design methodology for exoskeleton-user connection attachments, i.e., braces that aim to reduce parasitic forces and potentially improve user comfort. The proposed brace structure incorporates additional passive joints, identified through a hyperstaticity analysis to minimize undesired tangential forces, e.g., rubbing against the user's skin. To assess the proposed structure, we primarily conducted simulation experiments using a human-exoskeleton coupled model in an MSC ADAMS environment. Subsequently, a series of real-life experiments was conducted using a self-balancing bipedal exoskeleton with two distinct dummy manikins. The results demonstrated the feasibility of the proposed brace structure in reducing the parasitic forces and slippage compared to the conventional fixation approach.TÜBİTA
From the History of Soviet Chekhovian Studies of the 1920s-1940s: on Two Editions of "The Portrait of Chekhov's Creativeness" by A. B. Derman
No full textIn the history of Russian chekhovian studies the works by A. B. Derman appear in two points of view that are not equally relevant today. Though Derman repeats the official interpretations of Chekhov'slegacy (for example in his critical biographical essay “A. P. Chekhov” (1939) and “Moscow in the life and work of A. P. Chekhov” (1948) and other newspaper and magazine articles, he is also the author of a curious hypothesis, with the help of which he tried to explain the dominants of Chekhov's poetics, as well as to give an exhaustive psychologicalportrait of the writer. Curious hypothesis was formulated in his monograph “The portrait of Chekhov's creativeness” and partly in its subsequently added alterations. The hypothesis lies in the idea of “disharmony”of Chekhov's character: the primacy of the rational part over the emotional one. In Derman's opinion.В статье рассматриваются две редакции монографии А. Б. Дермана "Творческий портрет Чехова"
From the History of Soviet Chekhovian Studies of the 1920s – 1940s: on Two Editions of “The Portrait of Chekhov’s Creativeness” by A. B. Derman
No full textIn the history of Russian chekhovian studies the works by A. B. Derman appear in two points of view that are not equally relevant today. Though Derman repeats the official interpretations of Chekhov’s legacy (for example in his critical biographical essay “A. P. Chekhov” (1939) and “Moscow in the life and work of A. P. Chekhov” (1948) and other newspaper and magazine articles, he is also the author of a curious hypothesis, with the help of which he tried to explain the dominants of Chekhov’s poetics, as well as to give an exhaustive psychological portrait of the writer. Curious hypothesis was formulated in his monograph “The portrait of Chekhov’s creativeness” and partly in its subsequently added alterations. The hypothesis lies in the idea of “disharmony” of Chekhov’s character: the primacy of the rational part over the emotional one. In Derman’s opinion, Chekhov’s mentally evolution was built on the conscious overcoming of the defect, including through creativity, which had reflective and compensatory functions in this process. A comparison of the latter version of “The portrait of Chekhov’s creativeness” with the first edition gives us an interesting facts for characterizing the ideological processes which were typical for soviet criticism and literary studies from 1929s to the 1940s. This article focuses on the following problems: what did literary critics write about the first edition of “The portrait of Chekhov’s creativeness”, and how Derman corrected his work, resulting in the second version of “The portrait of Chekhov’s creativeness” (1944), which he did not publish
The Limits of Empire: Imperial History in the Wake of the Transnational Turn
No full textThe participants in this panel engage with recent historiography—and with each other—to debate the limits of imperial frameworks for understanding the past. Does the current emphasis on transnational approaches to the past add to, or detract from, imperial perspectives? Does the analytical validity of imperial containers fade during the modern era? Do stark divisions between the early modern Age of Empires and the modern Age of Nations obscure more than they clarify? The three papers presented will address these questions by drawing on case studies from Nazi Germany, twentieth-century China, and the eighteenth-century Atlantic world. In doing so, they aim to initiate a discussion of imperial history that will be of interest to scholars working on diverse temporal and geographic topics. Joshua Derman (Hong Kong University of Science and Technology) examines how the opposition between land and sea empires was thematized by Carl Schmitt, a controversial German theorist whose work is often uncritically cited by historians of empire today. Schmitt’s theories of land and sea cannot provide a coherent heuristic for historians, Derman argues; rather, they represent the product of a shifting field of dubious ideological positions. Shellen Wu (University of Tennessee) proposes revising twentieth-century Chinese history by stepping back from the discourse of the nation, and refocusing attention on the geographical expanse of the modern Chinese state. The rise of geopolitics, she argues, proves an invaluable framework for understanding how the discourses of science, race, and empire combined in the twentieth century to formulate a new ideology of empire. Turning our attention to the eighteenth-century Atlantic world, Christopher Magra (University of Tennessee) argues that capitalist behavior complicates the utility of imperial analytical frameworks. Merchants living in colonial Massachusetts—like their Dutch, French, and Spanish counterparts—flouted imperial commercial regulations, traded directly with foreign entrepreneurs, and defied the efforts of imperial customs agents in their pursuit of profits. Self-interested profit maximizers certainly made use of imperial legal and political institutions, but they did so to suit their own ends. The session will be chaired and commented by Jeremy Adelman, Walter Samuel Carpenter III Professor in Spanish Civilization and Culture and Director of the Council for International Teaching and Research at Princeton University. Prof. Adelman studies the history of Latin America in comparative and world contexts. He is the author or editor of ten books, including most recently Worldly Philosopher: The Odyssey of Albert O. Hirschman, which will be published in March 2013
Unusual Giant Adrenal Myelolipoma with Chronic Mild Postprandial Pain
No full textAdrenal myelolipomas are rare, small, benign, non-functioning tumors, which must be histopathologically differentiated from other tumors such as lipomas or liposarcomas. They are usually identified incidentally during autopsy, imaging or laparotomy. Occasionally, they may present acutely due to complications such as abdominal pain from retroperitoneal bleeding or systemic symptoms of infection. In differantial diagnosis, Magnetic Resonance Imaging may be useful to show characterize of tissue and relationship with other organs. We report a 66-year-old man with a giant adrenal myelolipoma clinically presenting with chronic mild postprandial pain with a brief review of the literature
Hedging with Stochastic and Local Volatility
No full textWe derive the local volatility hedge ratios that are consistent with a stochastic instantaneous volatility and show that this ‘stochastic local volatility’ model is equivalent to the market model for implied volatilities. We also show that a common feature of all Markovian single factor stochastic volatility models, (log)normal mixture option pricing models and ‘sticky delta’ models is that they predict incorrect dynamics for implied volatility. As a result they over-hedge the Black-Scholes model in the presence of a market skew and this explains the poor delta hedging performance of these models reported in the literature. Whilst the traditional ‘sticky tree’ local volatility models do not possess this unfortunate property, they cannot be used for pricing without exogenous and ad hoc smoothing of results. However the stochastic local volatility framework allows one to extend a good pricing model into a good hedging model. The theoretical results are supported by an empirical analysis of the hedging performance of seven models, each with different volatility characteristics, on the SP500 index skew.Local volatility, stochastic volatility, implied volatility, hedging, dynamic delta hedging, volatility dymamics
A.NAVOY'S GHAZALS TRANSLATION AND ANALYSE
No full textThe article is devoted to the French translation of A. Navoi's gazelle, which begins “Meni men istagan uz sukhbatiga arjumand etmas” and “Jonga chun derman not erdi ulmakim kayfiyati” by Hamid Ismoilov and JeanPierre Balpa. The author studied the work of translators in this area and conducted a deep analysis of the translation of a ghazal, that is, an Eastern work translated into Western European languages
General Rules and the Normativity of Causal Inferences in the First Book of Hume\u27s Treatise
No full textIn the paper, the author has undertaken the task of illuminating the meanings and connections that constitute Hume’s account of causality. The author’s method is critical, questioning the logical consistency and explanatory power of Hume’s skeptical causality and inference, only to eventually reveal the validity of Hume’s argument. Much of the analysis is spent making sense of the seemingly contradictory or confusing statements Hume makes in his Treatise; lots of examples help this process. The paper includes addressing the paradoxical connection between our internal/subjective general rules and our customs. It also examines the interesting question of how to judge the good or bad character of a potential new custom
- …
