270 research outputs found
High-strain actuation of lead-free perovskites : compositional effects, phenomenology and mechanism
No full textThesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2002.Includes bibliographical references.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.An experimental study was carried out to map the compositional dependence of electromechanical behavior and ferroelectric phase stability in the barium, zirconium-codoped sodium bismuth titanate (BNBZT) system for barium concentrations up to 18 mol.% and zirconium concentrations up to 4 mol.%. A number of polycrystalline BNBZT samples has been electromechanically tested under applied electric fields of different frequencies (0.2-47 Hz). A novel model of electromechanical response capable of describing both dynamic and static hysteresis for pure and mixed cases of ferroelectric, antiferroelectric, ferroelastic and paraelectric behavior has been developed. Major electromechanical properties of polycrystalline BNBZT have been identified and compositionally mapped. The peak of electromechanical response (d33 = 400 pC/N) has been found at the composition (Bil/2Nal/2)0.93Bao.07Zro.02Tio.9803. The compositional dependence of ferroelectric phase stability has been mapped by means of a Landau type free energy expansion. A nanodomain relaxation mechanism of frequency dependent electromechanical response of BNBZT has been suggested and is supported by optical and transmission electron microscopy.by Andrey N. Soukhojak.Ph.D
Artistic Features of Grigor Luzhnytsky’s story «Twelve Letters of f. Andrey Sheptytsky to Mother»
No full textУ статті проаналізовано повість Григора Лужницького «Дванадцять листів о. Андрея Шептицького до матері» як творче осмислення письменником реальних історичних матеріалів у поєднанні з художнім домис¬лом та вимислом. Досліджено композиційну структуру повісті, при цьому враховано символіку чисел. Схарак-теризовано біблійні ремінісценції твору, містичні елементи. Автор указує на поєднання сакрального і профан-ного в образних характеристиках Андрея Шептицького та його матері. Розглянуто категорії релігійності й патріотизму, які функціонують як нероздільні.The article analyzes the Grigor Luzhnytsky’s story «Twelve letters of f. Andrey Sheptytsky to mother» as writer’s creative comprehension of historical documentary evidence together with artistic conjecture and fiction. Compositional structures of the story, the symbolism of numbers are investigated. Biblical reminiscences of the work, mystical elements are analyzed. The author points to a combination of the sacred and profane in figurative charac-teristics of Andrew Sheptytsky and his mother. The categories of religiosity and patriotism, which function as inseparable, are considered
Genre modification strategy (based on the example of Andrey Nemzer’s public speeches and reviews)
No full textThe article presents the analysis of popular science lectures by literary critic Andrey Nemzer. The research is based on the radio series “Russian Prose of the Third Millennium”, in which Nemzer gave lectures on remarkable prose writers of the 1990s: N. Gorlanova, M. Vishnevetskaya, A. Slapovsky and A. Dmitriev. The author of the article compares Andrey Nemzer’s public speeches with thematically similar reviews published in “Nezavisimaya Gazeta”, “Segodnya” and “Vremya MN”. Similarities and differences are demonstrated by analyzing the content, structure and style of the selected materials. Thus, the research revealed that the genre of the lecture allows A. Nemzer to outline the writer’s career path, to conduct a reflection on previously read works at a different genre level and to extract one ideological line from them. By using many quotations, the lecturer gives literary texts another chance to be heard, but by a different audience and in another, new millennium. The article shows that by switching to a new format, Nemzer changes the presentation of the material. Thus, the critical space of the reviews, equipped with expression, questions and value judgments, is of an advisory nature, whereas the lecture cycle contains educational pathos. The public speeches tend to be more specific and explanatory. It is important that despite the differences, Nemzer remains true to the conclusions that he came to when he first read these works. He complies with the new genre, simplifying and clarifying the statements made by him years earlier. 
Ekaterinburg Atelier of Andrey Voronikhin
No full textРассматриваются екатеринбургские работы, прямо и косвенно связанные с именем выдающегося русского зодчего, высказывается предположение о руководящей роли самого архитектора, круга его единомышленников на одном из отрезков деятельности уральской казенной камнеобработки.The article describes some works made in Yekaterinburg and either directly or indirectly connected with the name of the outstanding Russian architect. The author considers the architect's leading role and his partners' role in the creation thereof during a historic period in the state stone working of the Urals
Paradoneis andreae Sikorski, 2017, n. sp.
No full text<i>Paradoneis andreae</i> n. sp. <p>(Figs 7, 8)</p> <p> <b>Material examined.</b> 2290 Tromsøsundet S15; 69.6573°N – 18.8813°E; 38 m; 23.04.2002; <b>holotype</b> (ZMBN 116015), three <b>paratypes</b> (ZMBN 116016) and 26 specimens. 2876 Finnmark 592; 70.0650°N – 29.0663°E; 88 m; 13.09.2003; four <b>paratypes</b> (ZMBN 116017) and 16 specimens.</p> <p> <b>Description.</b> Holotype longest specimen, complete, 14.5 mm long for 116 chaetigers, 0.4 wide at tenth chaetiger level. Branchial region slightly flattened (Fig. 8A), composed of wider than long segments; postbranchial region cylindrical, segments progressively longer than wide, ventrally divided in four rings (Fig. 8D); posterior region (last 12 chaetigers), cylindrical, composed of very short, almost discoidal segments. Preserved specimens light brown or yellowish. Prostomium with rounded tip, one and a half times as long as wide; antennae or insertion scar totally absent; eyes and apical sensory organ absent (Fig. 7A, 8A, B). Mouth ventrally oriented; anterior and lateral lips poorly developed; posterior lip extending to anterior margin of second chaetiger. Nuchal organs obliquely oriented, in a dorsolateral position (Fig. 8B); secondary ciliary organs absent. Prebranchial region with three chaetigers (Fig. 7A, 8A); branchiae extending to chaetiger 20 (to chaetiger 17–22, mean: 18.57, SD: 1.07, n: 21); progressively increasing in length from beginning to chaetiger 6, remaining branchiae similar in length to distance between bases, except the last two pairs, which are shorter; branchiae lanceolate (Fig. 8A), bent forward, bearing long ciliation on outer margin (Fig. 7A, B, 8C). Notopodial postchaetal lobe short and blunt, almost papiliform in prebranchial chaetigers (Fig. 7A); in branchial chaetigers, lobes progressively larger and subulate (Fig. 7A, B, 8C); in postbranchial chaetigers width progressively decreasing and length increasing (Fig. 7C), becoming cirriform in posterior-most chaetigers (Fig. 7D). Neuropodial postchaetal lobes as low ridges, of even height (Fig. 7B–D). Chaetae of pre- and branchial segments in dense fascicles, arranged in two rows in both noto- and neuropodia (Figs 7A, B, 8A); fewer and arranged in single row in post–branchial chaetigers (Fig. 7C, D); notochaetae gently curved, one and a half as long as body width in pre- and branchial chaetigers (Fig. 7A, B), numbering 15–20 in prebranchial chaetigers, 20–25 in branchial ones; notochaetae straight and thinner, twice longer than body width in postbranchial chaetigers, numbering 4–5 (Fig. 7C, D); forked notochaetae present from chaetiger 4, numbering 1–2 per fascicle (Fig. 7B–D), dorsal tine longer, bearing minute spines on internal surface, shaft smooth (Fig. 7E); neurochaetae in pre- and branchial chaetigers slightly thicker and shorter than corresponding notochaetae, narrowly limbate, and slightly geniculate, numbering about 40 in prebranchial chaetigers and about 50 in branchial ones (Fig. 7A, B); neurochaetae capillary in postbranchial chaetigers, numbering up to 12 (Fig. 7C); neuropodial fascicles from chaetiger 78 onwards (from chaetiger 48–76, mean: 66.75, SD: 9.72, n: 8) bearing a single spine-like chaeta with curved tip, clearly thicker than capillaries of the same fascicle, absent from the last two chaetigers (Figs 7D, F, 8E). Pygidium rounded, bearing a pair of flat pygidial cirri on a ventral position and a pair of shorter ones dorsally (Fig. 7G).</p> <p> <b>Remarks.</b> Within the genus <i>Paradoneis</i> only <i>P. eliasoni</i> Mackie, 1991, widely distributed through North Atlantic and also recorded in this work, and <i>P. strelzovi</i> de León-González & Díaz-Castañeda, 2011, from Baja California, bear single spine-like neurochaetae in posterior chaetigers and forked modified notochaetae (Mackie 1991; Aguirrezabalaga & Gil 2009; de León-González & Díaz-Castañeda 2011). However, these two species bear fewer branchiae; <i>P. eliasoni</i> possesses up to 12 pairs (Mackie 1991; Aguirrezabalaga & Gil 2009) and <i>P. strelzovi</i> has up to seven (de León-González & Díaz-Castañeda 2011). Apart of the number of branchiae, <i>P. strelzovi</i> can be told apart by the shape of the notopodial postchaetal lobes (almost papiliform in <i>P. andreae</i> <b>n. sp.</b>, distinctly triangular in <i>P. strelzovi</i>) and the type of branchiae, which have ciliated outer margins in <i>P. andreae</i> <b>n. sp.</b> and are smooth in <i>P. strelzovi</i> (de León-González & Díaz-Castañeda 2011). <i>Paradoneis eliasoni</i> also differs in the shape of the branchiae, which have ciliation both on outer and inner margins (Aguirrezabalaga & Gil 2009).</p> <p> <b>Etymology.</b> The new species is dedicated to Andrea, daughter of the first author.</p>Published as part of <i>Sikorski, Andrey, 2017, The Paraonidae (Annelida: Sedentaria) from Norway and adjacent seas, with two new species, four new records, and a redescription of Paraonides nordica Strelzov, 1968 based on type material, pp. 41-67 in Zootaxa 4320 (1)</i> on pages 56-58, DOI: 10.11646/zootaxa.4320.1.3, <a href="http://zenodo.org/record/891538">http://zenodo.org/record/891538</a>
Subnational Determinants of Foreign Direct Investments in the Russian Federation
No full textOur purpose is to examine the determinants of subnational distribution of Foreign Direct Investments (FDI) in the key fifteen regions of Russia over the period of 2005-2011 using panel data. Within the most important economic regions of the country we found market seeking is still the main purpose of foreign inward investments. As a result, the size of the Russian consumer market presents a significant influence on the foreign economic activities alongside trade openness and government economic incentives. Our results from regression analysis indicate that gross regional product per capita, trade openness and the existence of special economic zones have significant positive impact on the regional distribution of FDI in the Russian Federation
A Designed “Nested” Dimer of Cyanovirin-N Increases Antiviral Activity
No full textabstract: Cyanovirin-N (CV-N) is an antiviral lectin with potent activity against enveloped viruses, including HIV. The mechanism of action involves high affinity binding to mannose-rich glycans that decorate the surface of enveloped viruses. In the case of HIV, antiviral activity of CV-N is postulated to require multivalent interactions with envelope protein gp120, achieved through a pseudo-repeat of sequence that adopts two near-identical glycan-binding sites, and possibly involves a 3D-domain-swapped dimeric form of CV-N. Here, we present a covalent dimer of CV-N that increases the number of active glycan-binding sites, and we characterize its ability to recognize four glycans in solution. A CV-N variant was designed in which two native repeats were separated by the “nested” covalent insertion of two additional repeats of CV-N, resulting in four possible glycan-binding sites. The resulting Nested CV-N folds into a wild-type-like structure as assessed by circular dichroism and NMR spectroscopy, and displays high thermal stability with a T[subscript m] of 59 °C, identical to WT. All four glycan-binding domains encompassed by the sequence are functional as demonstrated by isothermal titration calorimetry, which revealed two sets of binding events to dimannose with dissociation constants K[subscript d] of 25 μM and 900 μM, assigned to domains B and B’ and domains A and A’ respectively. Nested CV-N displays a slight increase in activity when compared to WT CV-N in both an anti-HIV cellular assay and a fusion assay. This construct conserves the original binding specifityies of domain A and B, thus indicating correct fold of the two CV-N repeats. Thus, rational design can be used to increase multivalency in antiviral lectins in a controlled manner
Theory of Symbols by the second generation of Russian Symbolists & the Archetypal Theory: Religious, Anthropologic, Cultural Aspects of Succession
No full textThe article is about the Theory of Symbols by second generation of Russian Symbolists and the Archetypal Theory. Both of theories were researched as related religious and philosophical forms of the XXth cent. Western civilization crisis reflection and as attempts to foresee the ways of European mentality transformation. Admitting common cultural genesis of the theories, the author determined Jungian Archetypal Theory in succession to the Theory of Symbols by Andrey Bely. Also the author traced development of several of the Russian Modern Anthropological ideas at the American Post-modern Cultural Anthropology
Micro-Simulation of Social Security Reforms in Belgium
No full textThe present paper analyzes the budgetary impact of various Social Security reforms in the Belgian institutional setting. Our approach relies on parameters that were derived in Dellis et alii (2002) using a micro-modeling strategy. focusing our attention on a hypothetical age cohort, we illustrate the budgetary impact that the reforms considered might have on the budget of the federal government.
- …
