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Sari, Wina Puspita, i Asep Soegiarto. "Pemberdayaan Komunikasi dalam Menumbuhkan Semangat Belajar di Masa Pandemi Covid19". Satwika : Jurnal Pengabdian kepada Masyarakat 1, nr 1 (16.12.2021): 27–33. http://dx.doi.org/10.21009/satwika.010104.
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ABSTRAK COVID-19 menyebabkan seluruh aktivitas manusia dibatasi, termasuk kegiatan pembelajaran baik di jenjang sekolah dasar sampai jenjang perkuliahan mulai menerapkan kegiatan belajar dari rumah. Dari 17 peserta binaan mitra pkm yakni Yayasan Nurul Ihsan, hanya 3 peserta yang menyukai sekolah daring atau online karena waktu yang fleksibel dan bisa dibantu oleh orang tua dan kakak di rumah. sisanya sebanyak 14 peserta mengatakan tidak suka sekolah daring atau online karena pelajaran yang susah dimengerti dan banyak tugas, sisanya berkaitan dengan kuota yang boros, kangen sama guru dan bermain dengan teman. Pada kegiatan pengabdian masyarakat ini, Dosen Prodi D III Hubungan Masyarakat Universitas Negeri Jakarta melakukan sosialisasi pentingnya pemberdayaan komunikasi baik komunikasi interpersonal, komunikasi kelompok dan komunikasi massa untuk mengatasi permasalahan yang dihadapi dalam pemebelajaran daring agar dapat menumbuhkan semangat dan prestasi belajar di masa pandemic.
Kata kunci : Komunikasi Interpersonal, Komunikasi Kelompok, Komunikasi Massa, Semangat Belajar, Pandemi
Abstract COVID-19 has caused all human activities to be limited, including learning activities both at the elementary school level to the lecture level, starting to implement learning activities from home. Of the 17 participants assisted by PKM partners, namely the Nurul Ihsan Foundation, only 3 participants liked online schools because their time was flexible and could be helped by their parents and siblings at home. the remaining 14 participants said they did not like online or online schools because the lessons were difficult to understand and there were many assignments, the rest were related to wasteful quotas, missing teachers and playing with friends. In this community service activity, the Lecturer of the D III Public Relations Program at the State University of Jakarta socialized the importance of empowering communication, both interpersonal communication, group communication and mass communication to overcome the problems faced in online learning in order to foster enthusiasm and learning achievement during a pandemic.
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de Cesare, Sergio, i Chris Partridge. "BORO as a Foundation to Enterprise Ontology". Journal of Information Systems 30, nr 2 (1.02.2016): 83–112. http://dx.doi.org/10.2308/isys-51428.
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ABSTRACT Modern business organizations experience increasing challenges in the development and evolution of their enterprise systems. Typical problems include legacy re-engineering, systems integration/interoperability, and the architecting of the enterprise. At the heart of all these problems is enterprise modeling. Many enterprise modeling approaches have been proposed in the literature with some based on ontology. Few however adopt a foundational ontology to underpin a range of enterprise models in a consistent and coherent manner. Fewer still take data-driven re-engineering as their natural starting point for modeling. This is the approach taken by Business Object Reference Ontology (BORO). It has two closely intertwined components: a foundational ontology and a re-engineering methodology. These were originally developed for the re-engineering of enterprise systems and subsequently evolved into approaches to enterprise architecture and systems integration. Together these components are used to systematically unearth reusable and generalized business patterns from existing data. Most of these patterns have been developed for the enterprise context and have been successfully applied in several commercial projects within the financial, defense, and oil and gas industries. BORO's foundational ontology is grounded in philosophy and its metaontological choices (including perdurantism, extensionalism, and possible worlds) follow well-established theories. BORO's re-engineering methodology is rooted in the philosophical notion of grounding; it emerged from the practice of deploying its foundational ontology and has been refined over the last 25 years. This paper presents BORO and its application to enterprise modeling.
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Shearer, Charles K., i Steven B. Simon. "Boron Behavior During the Evolution of the Early Solar System: The First 180 Million Years". Elements 13, nr 4 (1.08.2017): 231–36. http://dx.doi.org/10.2138/gselements.13.4.231.
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The behavior of boron during the early evolution of the Solar System provides the foundation for how boron reservoirs become established in terrestrial planets. The abundance of boron in the Sun is depleted relative to adjacent light elements, a result of thermal nuclear reactions that destroy boron atoms. Extant boron was primarily generated by spallation reactions. In the initial materials condensing from the solar nebula, boron was predominantly incorporated into plagioclase. Boron abundances in the terrestrial planets exhibit variability, as illustrated by B/Be. During planetary formation and differentiation, boron is redistributed by fluids at low temperature and during crystallization of magma oceans at high temperature.
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Zhao, Ding Guo, Shu Huan Wang, Xiao Jie Cui i He Jun Zhang. "Research on Model of Solid-Solid Reaction and Experiment". Applied Mechanics and Materials 236-237 (listopad 2012): 751–54. http://dx.doi.org/10.4028/www.scientific.net/amm.236-237.751.
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In the paper, the reaction of solid-solid model was researched and we confirmed the reaction equation. The experiments in the lab shown that the t1/2 is 11.8min in the ferrosilicon reduction boron anhydride reaction at low temperature. The yield of boron is higher by direct reduction method smelting. In the boron oxide reducing experiment, the yield minimum is 76%, the maximum is 82%, and the average value is about 79%, which provides favorable foundation conditions for smelting amorphous mother alloy.
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Andres, Hanna, i Mariia Lutska. "Features of Private Art Collecting in Ukraine in 1990s–2000s". Research and methodological works of the National Academy of Visual Arts and Architecture, nr 29 (17.12.2020): 66–71. http://dx.doi.org/10.33838/naoma.29.2020.66-71.
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The article analyzes private art collecting in 1990s–2000s in Ukraine. It is important to mention that collecting works of art in Ukraine of the time indicated in the article does not have comprehensive coverage. The complexity of the study of this issue is also due to the closeness and limitation of access to private collections. The collapse of the USSR, the transition from a totalitarian regime to democracy and the establishment of a market economy in Ukraine contributed to the formation and creation of private collections of artistic works. At this time, three main branches of non-state collecting begin to form: private collections, corporate collections of institutions (banks, insurance companies) and foundations. In the early 1990s the practice of collecting works by banks came to Ukraine from the West. Ukrincombank, Southern Bank, Gradobank, etc. were involved in that work. The interest of private individuals in forming their own collections also begins with Ukraine’s acquisition of Independence, but gains momentum in the early 2000s. The art collections were represented by E. Dymshyts, L. Bereznitsky, A. Adamovsky, I. Voronov, V. Pinchuk and others. One of the most important collections began to be initiated by Boris and Tatiana Hrynyov family of in 1996. Their idea of the collection arose from the concept of Kharkiv artists. In the circle of their interests — the art of Soviet nonconformists and Ukrainian contemporary art. Foundations of art appeared in Ukraine after the proclamation of Independence in 1991. These are non-governmental and non-profit organizations, established by private or corporate enti- ties. Important foundations in Ukraine, that have their own collections of art, are Soviart, Alexander Feldman Foundation, Stedley Art Foundation etc. The collections of the 1990s and 2000s are very important for the history of Ukrainian art and collecting. The collectors of this period have played a key role in preserving the artistic heritage of Independent Ukraine.
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Li, Jiankun, Xiaowei Gu, Shenyu Wang, Zhihang Hu, Ziyang Hu i Xiaqing Li. "Study on the Preparation and Compressive Strength of Boron Mud-Based Basic Magnesium Sulfate Cement". Materials 17, nr 13 (4.07.2024): 3301. http://dx.doi.org/10.3390/ma17133301.
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The direct discharge of boron mud poses significant environmental hazards to soil and groundwater. Despite extensive research efforts, the reprocessing of boron mud has not yielded significant advancements. Recently, the development of magnesium cement has spurred interest in the reutilization of boron mud. However, the direct treatment of boron mud remains challenging, necessitating pre-treatment in most studies to achieve substantial results. Consequently, research on the direct incorporation of untreated boron mud is scarce. This study explores the feasibility of using uncalcined boron mud as a base material in basic magnesium sulfate cement (BMSC), composed of lightly calcined magnesia and magnesium sulfate heptahydrate. The effects of varying boron mud content on the compressive strength of the BMSC system were investigated. The results indicate that the 5·1·7 phase is the primary strength phase of BMSC. When the boron mud content is 30%, the uncalcined boron mud has a minimal impact on the formation of the 5·1·7 phase. Additionally, the 28 days compressive strength of BMSC-B30 showed a slight difference compared to the control group BMSC-C, registering at 66.7 MPa. TG-DSC analysis revealed that the presence of a small amount of boron mud inhibits the micro-expansion trend of the BMSC structure. Furthermore, XRD and SEM analyses confirmed that the addition of uncalcined boron mud does not significantly alter the phase structure of the 5·1·7 phase in BMSC. This study provides a foundational basis for the long-term development of direct boron mud treatment.
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Wasiu, Osisanya O., Diyanuwa A. Buduwara, Korode A. Isaac, Ibitoye T. Abel i Ajibade F. Zephaniah. "Assessment of Subsurface Competency Using Geotechnical Method of a Proposed Structure F.C.T Nigeria". Advances in Geological and Geotechnical Engineering Research 4, nr 4 (30.12.2023): 41. http://dx.doi.org/10.30564/agger.v4i4.5133.
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Structural failure has been recently happenings mostly in the commercially populated states along the coastal line in Nigeria. As a result, an open field at a chosen location in Abuja, Nigeria, was investigated. For the purpose of this study, test bores were drilled and Standard Penetration Tests (SPT) were conducted at every 1.5 m interval up to a maximum depth of 12.0 m with the bearing pressure ranging between 20 kN/m2 and 1000 kN/m2 . 3 test bores’ were drilled within the plot location, and samples were obtained at the test bores locations for laboratory analysis. Findings revealed that subsurface lithology found at the site within the explored depths of 0.0 ~ 12.0 m is mostly silty sand, laterite, sandy clay, silty clay, clayey sand, and weathered rock. The findings from the sub-soils of the different places and their bearing pressures were computed with SPT N value. Building foun dations may be rigid raft foundations at a depth of 2.0 meters below the present ground level, according to bearing capacity values that range from 20 kN/m2 to 60 kN/m2 at 1.5 to 3.0 meters. The recommended building foundations take into account the sub-soil’s characteristics at the drilling places at a depth of between 1.0 and 3.0 meters. The structure might also be supported by frictional piles buried 10 meters beneath the surface.
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Liu, Zhan Jun. "The Research on the Influence Cause of Boron Steel Sheet Size Precision Based on Automobile Light Quantizing". Advanced Materials Research 753-755 (sierpień 2013): 187–90. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.187.
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The influence cause of boron steel sheet on size precision is studied, which is contained with additional drawing stress, emergency ratio, board deep, plastic modulus, subdued point, sclerotic index, crushing force, curvature radius and so on .In order to lay the further foundations of optimizing design, it is analyzed that the latent relation of influence cause of boron steel sheet on size precision by orthogonal experiment. It is pointed orderly out that the influences with rebound result of certain automobile back wheel casing are that sheet crushing force occupies the first place, sheet thick comes second, and sclerotic index comes third, emergency ratio and curvature radius in order. It is reached that the lowest rebound condition formed of certain automobile back wheel casing drawing, the rebound way controlled is given to boron steel sheet on size precision.
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Wang, Fang, Rui Hua Wang, Min Han Xu, Xiao Bo Bai, Ai Xia Chen, Da Ming Du, Shi Bin Li, Jie Guang Song i Lin Chen. "Preparation and Characterization of Al2O3-B4C Coated Composite Powder by Hydrothermal Method". Materials Science Forum 977 (luty 2020): 96–101. http://dx.doi.org/10.4028/www.scientific.net/msf.977.96.
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Both alumina and boron carbide have good hardness and strength, and are widely used in production and life, industrial manufacturing, and military defense. However, due to the insufficiency of research at this stage and the lack of technical means, it is difficult to prepare alumina-boron carbide composite powder with good coating and ultra high strength through large-scale batch production. Therefore, this experiment wants to obtain a relatively good performance of coated Al2O3/B4C cermet by hydrothermal method through different experimental parameter ratios. Through the experimental results and analysis, the following conclusions are obtained. The most suitable concentration of aluminum nitrate is 0.1 mol/l. The low concentration affects the formation of alumina particles. The concentration is too high and prone to agglomeration. Through the optimization of hydrothermal synthesis concentration, a composite of Al2O3/B4C composite with good nanoencapsulated structure was obtained. The composite powder was pure in composition and high in specific surface area, which lays a foundation for solving the low-temperature preparation of high-density boron carbide ceramics.
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Grigoriev, N. D. "Boris S. Jacobi". World of Transport and Transportation 17, nr 4 (15.01.2020): 284–300. http://dx.doi.org/10.30932/1992-3252-2019-17-4-284-300.
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185 years ago, in 1834 the first really working and sufficiently powerful electric motor was assembled by the young scientist, Moritz Herman von Jacobi in Königsberg (now Russian city of Kaliningrad). The article is dedicated to the life and scientific achievements of the scientist who became known under the name of Boris Jacobi after he moved to Russia and took the Russian first name. His merits, in particular, include development of a method of electroplating, that laid foundation for the entire field of applied electrochemistry. It’s worth noting that the scientist revealed the results of the study in publicly available, or, in modern terms, open access publication. Jacobi worked in different fields. He invented a series of devices to measure electric resistance , called by him voltagometer (rheochord, or slide-wire). His research activities were also successful in the field of telegraphy, he invented synchronously acting telegraph device with direct (without further decoding) indication of the letters and numbers at the receiver and first ev er letter-printing telegraph device, he administered the project of construction of first cable lines in St. Petersburg and between St. Petersburg and Tsarskoe selo (Emperors’ residence). Jacobi developed galvanic batteries, anti-ship mines of new type, initiated creation of galvanic teams within pioneer units of the Russian army. Boris Jacobi initiated and managed unitage, establishment of metric system, and of weight and measure standards in Russia. Thanks to numerous scientific achievements Jacobi received well-deserved recognition of his contemporaries.
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Vandiver, Susan T. "Book Reviews: Working in Foundations: Career Patterns of Women and Men. Teresa Jean Odenthal, Elizabeth Trocalli Boris, and Arlene Kaplan Daniels. New York: The Foundation Center, 1985, 115 pp., $12.95". Affilia 1, nr 2 (czerwiec 1986): 64–65. http://dx.doi.org/10.1177/088610998600100212.
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LEYBOVICH, OLEG. "“AN OBSCURE STRANGE TYPE IN A RUSSIAN SHIRT...”. BORIS NAZAROVSKY AND THE NEW CHRONOLOGY OF PERM". Культурный код, nr 2023-2 (2023): 53–69. http://dx.doi.org/10.36945/2658-3852-2023-2-53-69.
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Based on published and archival materials, the article examines the cultural aspects of the 1968-1972 discussion on the date of Perm's foundation. The 1968-1972 discussion was made possible due to a partial reorientation of the Soviet cultural policy after 1964. There was a tendency towards regional cultural autonomy, the formation of a local cultural identity: special symbols, appreciation of the historical landscape, conservation of cultural heritage and creation of regional traditions. In the discussion about the foundation time of Perm, the main question was solved: which social group is the most significant in the regional historical tradition - the workers (craftsmen) or the bureaucracy. The discussion was not so much about history as about the present day. It made for an emotionally charged discussion. Boris Nazarovsky, a journalist from Perm, was its initiator and the main protagonist. It was he who skillfully and energetically defended the idea of 1723, the date of foundation of a copper-smelting plant on the territory of Perm, and with it the priority of working-class origin in the history of the city. The contradiction between the insignificant historical content of the discussion and its cultural importance is pointed out. The conclusion is made that the dispute about the time of the city's foundation was the final moment in the creation of a special Perm identity. The conflict involved a confrontation between the original inhabitants of Perm and the "outsiders". The rivalry with Ekaterinburg (Sverdlovsk) played a subordinate role in the debate.
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Милахин, Д. С., Т. В. Малин, В. Г. Мансуров, Ю. Г. Галицын, А. С. Кожухов, И. А. Александров, Н. В. Ржеуцкий, Е. В. Лебедок, Е. А. Разумец i К. С. Журавлев. "Формирование нанокристаллов GaN на поверхности графеноподобных g-AlN и g-Si-=SUB=-3-=/SUB=-N-=SUB=-3-=/SUB=-". Физика твердого тела 61, nr 12 (2019): 2327. http://dx.doi.org/10.21883/ftt.2019.12.48546.48ks.
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In this work, the GaN nanocrystals formation on a graphene-like modification of AlN (g-AlN) and graphene-like silicon nitride (g-Si3N3) by ammonia molecular beam epitaxy was studied. The GaN growth on the g-Si3N3 surface was found to result in the misoriented nanocrystals formation. With the GaN growth on the g-AlN surface, epitaxial growth of the equally oriented GaN quantum dots with graphite-like modification was observed. The lattice parameters and the energy structure of two GaN graphite-like modifications with alternating layers AB (graphite structure) and AA’ (hexagonal boron nitride structure) were calculated. This work was supported by the Russian Foundation for Basic Research (№ 17-02-00947-Бел_а and 18-52-00008-а). This work was supported by the Belarusian Republican Foundation for Basic Research in the framework of the joint project Ф18Р-234.
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Gerov, G. P. "The early iconographic program of St. Andrew Stratelates Churchin Novgorod Detinets". Journal of Visual Theology 5, nr 2 (2023): 164–76. http://dx.doi.org/10.34680/vistheo-2023-5-2-164-176.
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The article begins with the history of St. Andrew Stratelates Church in Veliky Novgorod. It is shown that today’s church dedicated to St. Andrew was originally built as a chapel of the Boris and Gleb Cathedral in Novgorod Detinets. The St. Andrew Stratelates Church now stands alone in the south-eastern part of Novgorod Detinets, but until 1682 it was the south-ern chapel of the Boris and Gleb Cathedral. Its earliest part was erected at the former location of cathedral’s staircase tower. The initial church, as the paper suggests, was constructed to com-memorate the capture of Swedish Landskrona fortress in 1301 by the army of Prince Andrey III Alexandrovich. It was later rebuilt by Euthymius II, the Archbishop of Novgorod, likely in 1441, simultaneously with rebuilding the Boris and Gleb Cathedral “on its old foundation”. Then the paper turns to the description and analysis of what remains today of the initial iconographic pro-gram of the original St. Andrew Stratelates Church, namely a composition with nine images of saints in the lower part of the northern wall, which belongs to the earliest period of painting. On the right we see the Apostle Peter, an Archangel (Michael?) and the Apostle Paul being blessed by Christ. In the background stand a few praying figures: St. Andrew Stratelates, the patron saint of the church, as well as the Holy Equal-to-the-Apostles St. Prince Vladimir Svyatoslavich, passion bearers princes Boris and Gleb, and two unidentified holy women. The composition was likely to be created after 1494, when the Boris and Gleb Cathedral in Novgorod burned again. Although the origins of the mural remain unknown, a connection with the capture of the Landskrona for-tress is a likely possibility. Indeed, St. Andrew Stratelates Church was first constructed in 1302, i. e., a year following the capture of Landskrona, and it was initially integrated into the Boris and Gleb Cathedral which speaks for itself in view of military overtones of the cult of Boris and Gleb.
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Koch, Robert, Peter C. Metz, Oscar Jaime, C. Ingram Vargas-Consuelos, Raúl Borja-Urby, J. Y. Peter Ko, James T. Cahill i in. "Nanodomains and local structure in ternary alkaline-earth hexaborides". Journal of Applied Crystallography 51, nr 5 (24.09.2018): 1445–54. http://dx.doi.org/10.1107/s1600576718012657.
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The local structures of ternary alkaline-earth hexaborides (MB6, M = Ca0.5Sr0.5, Ca0.5Ba0.5 and Sr0.5Ba0.5) have been analysed using X-ray pair distribution function (PDF) analysis, Raman spectroscopy and transmission electron microscopy (TEM). The results show significant local deviations from the average cubic structure within the boron sub-lattice and support the conclusion that rapid synthesis processes lead to the formation of coherent nanodomains over length scales of about 10 nm. Reverse Monte Carlo fitting of the PDFs allows for quantification of the displacement disorder within the boron sub-lattice as a function of sample composition. Detailed Raman spectroscopy studies and high-resolution TEM support the models derived from X-ray scattering. The average magnitude of the static displacement disorder varies by sample composition and positively correlates with the cation radius ratios across the three compositions. The new models form a foundation for future computational and experimental studies aimed at understanding and predicting properties of hexaborides.
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Chipilski, Hristo G., Xuguang Wang i David B. Parsons. "Object-Based Algorithm for the Identification and Tracking of Convective Outflow Boundaries in Numerical Models". Monthly Weather Review 146, nr 12 (19.11.2018): 4179–200. http://dx.doi.org/10.1175/mwr-d-18-0116.1.
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Abstract A novel object-based algorithm capable of identifying and tracking convective outflow boundaries in convection-allowing numerical models is presented in this study. The most distinct feature of the proposed algorithm is its ability to seamlessly analyze numerically simulated density currents and bores, both of which play an important role in the dynamics of nocturnal convective systems. The unified identification and classification of these morphologically different phenomena is achieved through a multivariate approach combined with appropriate image processing techniques. The tracking component of the algorithm utilizes two dynamical constraints, which improve the object association results in comparison to methods based on statistical assumptions alone. Special attention is placed on some of the outstanding challenges regarding the formulation of the algorithm and possible ways to address those in future research. Apart from describing the technical details behind the algorithm, this study also introduces specific algorithm applications relevant to the analysis and prediction of bores. These applications are illustrated for a retrospective case study simulated with a convection-allowing ensemble prediction system. The paper highlights how the newly developed algorithm tools naturally form a foundation for understanding the initiation, structure, and evolution of bores and convective systems in the nocturnal environment.
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Zhang, Hui. "The image of Boris Godunov in the drama by A. S. Pushkin and opera by M. P. Mussorgsky: comparative analysis of philosophical-aesthetic, psychological and social components". Философия и культура, nr 7 (lipiec 2020): 31–40. http://dx.doi.org/10.7256/2454-0757.2020.7.33393.
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The subject of this research is the image of Boris Godunov viewed in three different aspects in the eponymous drama by A. S. Pushkin and in the opera by M. P. Mussorgsky. The goal consist in description of multifacetedness and complexity of image of the Tsar, as well as his main traits in representation of the poet and the composer, which helps the performers in staging the opera “Boris Godunov”. A comparative analysis of drama and opera is conducted in accordance with the tree main categories: philosophical-aesthetic foundation, psychological portrait, peculiarities of social environment and place of the hero therein. The main conclusions consist in determination of the important sides of possible interpretation of the image of Tsar as: 1) basic philosophical idea that underlies the entire play, and thus defines the role of Godunov in the artistic concept of stage director and actor; 2) key psychological traits that set the emotional tone for the image of Tsar Boris Godunov; 3) nature and specificity of relations between the protagonist and other characters. The scientific novelty of this article is defined by an attempt to determine the key trends in creating an artistic image of the hero by means of theoretical analysis of representations on protagonist in the drama by A. S. Pushkin and opera by M. P. Mussorgsky. The author believes that the range of qualities and traits imposed by these prominent upon Boris Godunov would help the novice actors to find the key to their unique interpretation of this character.
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ZEMTSOVSKY, IZALY, i ALMA KUNANBAEVA. "Homo Lyricus, or Lyric Song in the Ethnomusicological Stratigraphy of “Folkloric Culture”: Notes for a Monograph (part 2)". Revista de etnografie și folclor / Journal of Ethnography and Folklore 2023, nr 1-2 (2023): 139–67. http://dx.doi.org/10.59277/jef.2023.1-2.09.
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"Authors concentrate on the very fact that there existed among the cultures of Eurasia songs resembling Japanese oiwake, this uniquely sophisticated form that were also in some respects analogous to it in significance. That solo-performed lyric “long” song is an international phenomenon, one that is found to this day along practically the entire length of the Great Silk Road. Such masterworks constitute one-of-a-kind creative products that are, as it were, Mona Lisas of oral tradition. Authors gave the creator of lyric songs, the lyric singer and poet, the name Homo Lyricus. The article consists of six sections: Just how unique is oiwake? (preface); Methodological foundations (after Boris Putilov); Toward future research: hypotheses and limitations; Lyric drawn-out song in the great expanse of typological succession; On the problem of authorship in Eurasian drawn-out song; Some concluding theses on freedom as the essence of lyric song; and a musical supplement. Note: “folkloric culture,” as opposed to “folk culture,” the term is Boris Putilov’s. Keywords: ethnomusicology, folkloristics, lyric singer and poet, lyric long solo song, drawn-out song, oiwake, urtyn duu, ozyn кüi, hora lungă, typological succession, Great Silk Road, Eurasia, Boris Putilov. "
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Bozieva, Naima Borisovna. "Poetry of Boris Kagermazov". Litera, nr 1 (styczeń 2021): 64–73. http://dx.doi.org/10.25136/2409-8698.2021.1.34521.
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The subject of this article is the analysis of poetry of Boris Kagermazov. The object of this research is the genre, plot, composition, and thematic peculiarities the epic works of Boris Kagermazov. The goal of this article is to reveal the specific features of the poems, their compositional structure, novelties s in poetics, and role of this genre in the works of Boris Kagermazov. Detailed examination is conducted on peculiarities of the poems “Echo of the War”, “Grief and Anger”, “Harmonist”. Attention is given to the analysis of poetic theme and problematic of the poems, as well as to their composition and artistic skill of B. Kagermazov. The relevance of the selected topic is defined by the crucial role of B. Kagermazov in evolution of the genre of poem in the Kabardian-Circassian literature of the XX century, the depth of artistic conceptualization of the historical process, and embrace of the system of philosophical, spiritual- ethical, and aesthetic values of his ethnic group. The acquired results may serve as the theoretical foundation in the further examination of the works of B. Kagermazov and studying the Adyghe poetry, namely lyrical and lyrical-epic works; their practical application can be found in specialized courses, research works of the pedagogues, postgraduates and students. The conclusion is made on the novelties introduced by the poet in creation of original modifications of the poem, which is reflected in the diffusion of genres, simultaneous use of certain elements of lyrics, epic, and drama. The poet's artistic pursuits made significant contribution to enrichment of the national literature.
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Wang, Jiaxiang, Luqi Wang i Yueyao Li. "Investigating the Catalytic Influence of Boron on Ni-Co/Ca Catalysts for Improved Syngas Generation from Rice Straw Pyrolysis". Molecules 29, nr 8 (11.04.2024): 1730. http://dx.doi.org/10.3390/molecules29081730.
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A series of boron-promoted Ni-Co/Ca catalysts were synthesized by the sol–gel method to enhance syngas generation from biomass pyrolysis. The efficiency of these catalysts was evaluated during the pyrolysis of rice straw in a fixed-bed reactor, varying the Ni/Co ratio, boron addition, calcination temperature, and residence time. The catalysts underwent comprehensive characterization using X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) analysis, scanning electron microscopy (SEM), and hydrogen temperature-programmed reduction (H2-TPR). The results indicated that the Ni-Co/Ca catalysts yielded superior syngas compared to singular Ni or Co catalysts, suggesting a synergistic interplay between nickel and cobalt. The incorporation of 4% boron significantly decreased the particle size of the active metals, enhancing both the catalytic activity and stability. Optimal syngas production was achieved under the following conditions: a biomass-to-catalyst mass ratio of 2:1, a Ni-Co ratio of 1:1, a calcination temperature of 400 °C, a pyrolysis temperature of 800 °C, and a 20 min residence time. These conditions led to a syngas yield of 431.8 mL/g, a 131.28% increase over the non-catalytic pyrolysis yield of 188.6 mL/g. This study not only demonstrates the potential of Ni-Co/Ca catalysts in biomass pyrolysis for syngas production but also provides a foundation for future catalyst performance optimization.
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SMYTH, REGINA. "Building State Capacity from the Inside Out: Parties of Power and the Success of the President's Reform Agenda in Russia". Political Theory 30, nr 4 (sierpień 2002): 555–78. http://dx.doi.org/10.1177/0090591702030004003.
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In contrast to his predecessor Boris Yeltsin, Russia's President Vladimir Putin continues to successfully neutralize legislative opposition and push his reform agenda through the State Duma. His success is due in large part to the transformation of the party system during the 1999 electoral cycle. In the face of a less polarized and fragmented party system, the Kremlin-backed party of power, Unity, became the foundation for a stable majority coalition in parliament and a weapon in the political battle to eliminate threatening opponents such as Yuri Luzhkov's Fatherland-All Russia and the Communist Party of the Russian Federation.
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Keshavamurthy, Ramaiah, Vijay Tambrallimath, Swetha Patil, Ali A. Rajhi, Alaauldeen A. Duhduh i T. M. Yunus Khan. "Mechanical and Wear Studies of Boron Nitride-Reinforced Polymer Composites Developed via 3D Printing Technology". Polymers 15, nr 22 (9.11.2023): 4368. http://dx.doi.org/10.3390/polym15224368.
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In the realm of 3D printing, polymers serve as fundamental materials offering versatility to cater to a diverse array of final product properties and tailored to the specific needs of the creator. Polymers, as the building blocks of 3D printing, inherently possess certain mechanical and wear properties that may fall short of ideal. To address this limitation, the practice of reinforcing polymer matrices with suitable materials has become a common approach. One such reinforcement material is boron nitride (BN), lauded for its remarkable mechanical attributes. The integration of BN as a reinforcing element has yielded substantial enhancements in the properties of polylactic acid (PLA). The central objective of this research endeavor is the development of polymer composites based on PLA and fortified with boron nitride. This study undertakes the comprehensive exploration of the compatibility and synergy between BN and PLA with a keen focus on examining their resultant properties. To facilitate this, various percentages of boron nitride were incorporated into the PLA matrix, specifically at 5% and 10% by weight. The compounding process involved the blending of PLA and boron nitride followed by the creation of composite filaments measuring 1.75 mm in diameter and optimized for 3D printing. Subsequently, test specimens were meticulously fabricated in adherence with ASTM standards to evaluate the ultimate tensile strength, dimensional accuracy, wear characteristics, and surface roughness. The findings from these assessments were systematically compared to the wear properties and mechanical behavior of PLA composites reinforced with boron nitride and the unreinforced PLA material. This study serves as a foundational resource that offers insights into the feasibility and methodologies of incorporating boron nitride into PLA matrices, paving the way for enhanced polymer composite development.
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Xu, Xiao Ying, i Chang Wei Shao. "Computational Studies of the Synthesis of Decaborane with Olefins". Materials Science Forum 993 (maj 2020): 959–66. http://dx.doi.org/10.4028/www.scientific.net/msf.993.959.
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Inertial Confinement Fusion (ICF) is an effective way to achieve nuclear fusion. In ICF, boron carbide ceramics are a crucial material to prepare targets due to its high neutron capture section, high hardness, and thermal stability. A common way to prepare boron carbide is the precursor transformation method, which can overcome the difficulty in the shaping of ceramics. Decaborane and olefins are reaction materials to prepare the precursor. However, the mechanism of the reaction is not clear now, and few studies on computational chemistry have been published in this area. In this research, the semi-empirical method of quantum mechanics and Molecular Dynamics in Hyperchem8.0 were used to optimize molecules in geometry. Formation enthalpy, bond energy, bond length and angle were calculated to explain experimental patterns. The optimized data is consistent with some typical phenomena in hydroboration and ring-opening metathesis polymerization. It demonstrates that those computational methods in Hyperchem8.0 can be applied to interpret and predict relevant reactions. In addition, this explanation provides a theoretical foundation for future synthesis on polyborane precursor.
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Kar, Guruprasad, i Manik Banik. "Several foundational and information theoretic implications of Bell’s theorem". International Journal of Quantum Information 14, nr 06 (wrzesień 2016): 1640027. http://dx.doi.org/10.1142/s021974991640027x.
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In 1935, Albert Einstein and two colleagues, Boris Podolsky and Nathan Rosen (EPR) developed a thought experiment to demonstrate what they felt was a lack of completeness in quantum mechanics (QM). EPR also postulated the existence of more fundamental theory where physical reality of any system would be completely described by the variables/states of that fundamental theory. This variable is commonly called hidden variable and the theory is called hidden variable theory (HVT). In 1964, John Bell proposed an empirically verifiable criterion to test for the existence of these HVTs. He derived an inequality, which must be satisfied by any theory that fulfill the conditions of locality and reality. He also showed that QM, as it violates this inequality, is incompatible with any local-realistic theory. Later it has been shown that Bell’s inequality (BI) can be derived from different set of assumptions and it also find applications in useful information theoretic protocols. In this review, we will discuss various foundational as well as information theoretic implications of BI. We will also discuss about some restricted nonlocal feature of quantum nonlocality and elaborate the role of Uncertainty principle and Complementarity principle in explaining this feature.
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Marchuk, Liudmula. "The wordlview and language concept of Boris Hrynchenko in the epistolary heritage (on the material of the collection "...We will be able to give ourselves to Ukraine". Correspondence of Trokhym Zinkivskyi with Borys Grinchenko)". IVAN OHIIENKO AND CONTEMPORARY SCIENCE AND EDUCATION 20 (25.12.2023): 96–105. http://dx.doi.org/10.32626/2309-7086.2023-20.96-105.
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The peculiarity of the epistolary heritage is revealed in the variety of genre forms of the letter, in the depth of philosophical searches, in the inexhaustibility and sincerity of feelings, in linguistic stylistic experiments and careful attitude to epistolary canons.Letters, as is known, form the basis of epistolary texts. Among other types of texts, they are distinguished by a clear orientation to a specifi c type of addressee and provision of correspondence communication. The construction of such texts depends on many factors: the presence of a textual tradition, the situation of hypothetical per-ception of the text, the addressee, forms of implementation and distribution of the text, and other subjective conditions of epistolary communication.B. Grinchenko’s worldview and language concept is defi ned in a signifi cant creative heritage, which covers the following issues: the signifi cant role of language in the develop-ment of national culture and in the self-determination of the people; the formation of public opinion against the restrictions and prohibitions of the Ukrainian language by tsarism; devel-opment of theoretical foundations regarding the sources of enrichment and ways of develop-ment of the Ukrainian literary language; attitude to spelling practice; standardization of the Ukrainian literary language; creative communication with other writers.In the letters of B. Hrinchenko, structural and semantic features typical for Ukrainian epistolary are refl ected, which are creatively reworked in specifi c texts. Each letter can be considered as a separate completed act of communication.Ukraine became the key image-symbol in the correspondence between Borys Grinchenko and Trokhym Zinkivskyi. Ukraine, the Ukrainian language, Ukrainian writers are the key points in B. Grinchenko’s correspondence, as they coincide with the life position of the author of the letters. Borys Hrinchenko’s correspondence is a vivid example of how obsessed a person must be, who laid a brick in the foundations of the independent new state of Ukraine.
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Chesnokova, Olga S., i Irina B. Kotenyatkina. "“The Legendary Foundation of Buenos Aires” by H.L. Borges in the space of languages and cultures". Philological Sciences. Scientific Essays of Higher Education, nr 6s (listopad 2023): 58–66. http://dx.doi.org/10.20339/phs.6s-23.058.
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This article discusses the evidence of a complex analysis of the linguapoetics of outstanding Argentine writer J.L. Borges’ poem “The Legendary Foundation of Buenos Aires” with a special impact on the intertextual approach to the text, showing the possibility of its multiple interpretations, including in translated versions. The relevance of the topic is due to the lack of interpretation and comparison of translations of the poem “The Legendary Foundation of Buenos Aires”, which is important both for philological hermeneutics, comparative-typological linguistics, and for the practice of teaching philological disciplines.The main goal of the article is the interpretation of translation solutions, its lexical-semantic, grammatical, aesthetic features in translations into Russian (Boris Dubin) and English (Alistair Reid) based on an analysis of the linguapoetics of the original. It is pivotal that the idiolect of Borges, reflected in this poem and combining psychological time, a flexible chronotype, numerous allusions and precedent phenomena of the Argentine and Rioplatense cultural space, the personal experience of the author, the specifics of the Argentine national variant of the Spanish language, undergoes inevitable transformations during translations, reflecting, however, the unique aesthetic message of the Argentine Master, high professionalism of the translators and at the same time the typological features of the Russian and English languages.
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Guo, You Dan. "Critical Cooling Rate and Design of Mould Cooling System for Hot Forming of High-Strength Sheet". Advanced Materials Research 295-297 (lipiec 2011): 1474–78. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.1474.
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High-strength sheet including 2MnB5 Boron and magnesium alloy sheet is the material commonly used in modern machinery, which is easy to induce problems such as excessive rebound, cracking, forming force increase, easy mould wear and the like. The heat analysis of 2MnB5 Boron and magnesium alloy sheet hot stamping forming process and experiments indicate that the transition process from Austenite to Martensite by controlling the sheet heating and cooling temperature is the foundation of heat forming. Only when the cooling rate reaches or surpasses the critical cooling rate, Austenite can be transformed to Martensite directly. Critical cooling rate of sheet is related to the elements of critical water flow rate, mould cooling system design, cooling medium, dented mould medium and the like. Under the condition that the elements of mould structure, cooling system, cooling medium and the like are defined, critical cooling rate is a constant value. As a result, through controlling critical water flow rate, hot forming transition process and hot forming requirements can be guaranteed to overcome the excessive rebound, cracking, forming force increase, easy mould wear and the like in hot forming process.
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Zolotukhin, Valeriy. "Speech Melody Research as the Interdisciplinary Foundation of the Petrograd Institute of the Living Word". Arts 13, nr 1 (7.02.2024): 31. http://dx.doi.org/10.3390/arts13010031.
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The assumption of similarity between artistic speech melody and music was deeply rooted in Russian Symbolism and based on the culturally established analogy between poetry/lyrical prosody and music. This connection was the basis for a wide range of performative practices focused on performed word such as the experiments of director Vsevolod Meyerhold and composer Mikhail Gnesin in Petrograd theater studios in 1900–1910s, and the collective declamation of Vasilii Serezhnikov and Vsevolod Vsevolodskii-Gerngross. However, after the October revolution, this analogy not only inspired new artistic paths, but also new approaches in humanities. This article explores the correlation between a practice-based strategy and advanced theory that characterized the structure and curricula of the Petrograd Institute of the Living Word (Institut zhivogo slova; 1918–1924). Its specific institutional features affected the development of disciplines in the fields of linguistics, poetics, and literary studies. The earlier period of its work (1918–1921) was defined by the search for common ground, which could unite representatives of different disciplines. The study of the melody of speech, which this article is focused on, became one of the key joint research projects of the Institute’s team. It is the perspective of the Institute of the Living Word’s research projects and performance-related art practices that is used for analysis of the Russian Formalist approaches in the 1910s–20s, specifically articles and books of philologist Boris Eikhenbaum on the melody and composition of verse intonation.
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Guyot, Blandine. "L'Association des Karaïmes à Paris: de l'entraide amicale (1923-1939) à la lutte contre « la menace monstrueuse suspendue sur nos têtes » (1939-1945)". Almanach Karaimski 9 (30.12.2020): 9–58. http://dx.doi.org/10.33229/ak.2020.9.1.
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At the beginning of the 1920s an active émigré community of 324 Karaims (275 Karaims from Crimea and 49 Karaims from Constantinople) had established itself in France. In 1923 they formed an organisation called the Karaims’ Association in Paris (Association des Karaïmes à Paris), headed by Salomon Krym and Boris Saratch. From its initial foundation until 1938, its goal was to promote mutual assistance, foster community ties and support the Karaim religion. However, in 1938, in response to increasing racial persecution and antisemitism in Europe, the Association assumed a new outlook and devoted greater time and effort to trying to help and protect Karaims in distress, mainly those based in Germany and Czechoslovakia.
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Feng, Chenyin, Wenwei Wu, Huidi Liu, Junke Wang, Houzhao Wan, Guokun Ma i Hao Wang. "Emerging Opportunities for 2D Materials in Neuromorphic Computing". Nanomaterials 13, nr 19 (7.10.2023): 2720. http://dx.doi.org/10.3390/nano13192720.
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Recently, two-dimensional (2D) materials and their heterostructures have been recognized as the foundation for future brain-like neuromorphic computing devices. Two-dimensional materials possess unique characteristics such as near-atomic thickness, dangling-bond-free surfaces, and excellent mechanical properties. These features, which traditional electronic materials cannot achieve, hold great promise for high-performance neuromorphic computing devices with the advantages of high energy efficiency and integration density. This article provides a comprehensive overview of various 2D materials, including graphene, transition metal dichalcogenides (TMDs), hexagonal boron nitride (h-BN), and black phosphorus (BP), for neuromorphic computing applications. The potential of these materials in neuromorphic computing is discussed from the perspectives of material properties, growth methods, and device operation principles.
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Shalimova, Nina A. "Enlightened Theatre Studies of Boris Lyubimov". ТЕАТР. ЖИВОПИСЬ. КИНО. МУЗЫКА, nr 4 (2022): 197–208. http://dx.doi.org/10.35852/2588-0144-2022-4-197-208.
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The article focuses on the works of Professor Boris Lyubimov, published in three volumes under the title Present Century – Past Centuries. The author outlines Lyubimov’s scholar worldview foundations, which are firmly connected with the religious and philosophical tradition of Russian thought. The analysis focuses on three main aspects of his legacy: historical and theoretical works, theatre and literary criticism, and journalism. The author reveals his scholar methodology, based on a convergence of theatre science with revelations of Russian religious philosophers and probes of Russian philology. The scientific problems of his works are outlined: the relationship between cult and culture, between the Church and the theatre in a historical retrospective, the scenic nature of Fyodor Dostoevsky’s prosaic texts, the structure-forming significance of the triad “literature – actor – director” in the art of theatre, the scientific tools of modern theatre studies. The author analyses the broad humanitarian approach of the scientist to the phenomena of theatrical history and modernity, along with the key problems of Russian life, culture and spirit. The specific features of Lyubimov’s scientific analytics and critical reflection are highlighted: historicism, the method of contextual analysis, the accuracy of factual account and factual knowledge, the reasoned balance of judgments. The author considers the genre and thematic diversity of Lyubimov’s criticism, the range of problems he analyses and the main stylistic features of his journalistic works.
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Bao, Jun, Zhong Wen Xing, Bao Yu Song, Yu Ying Yang i Hong Sheng Liu. "Experiments and Numerical Simulation of Hot Bending and Die Quenching for Ultra-High Strength Boron Steel". Materials Science Forum 628-629 (sierpień 2009): 499–504. http://dx.doi.org/10.4028/www.scientific.net/msf.628-629.499.
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Hot bending and die quenching for U-shaped parts with ultra-high strength boron steel were experimented and simulated to study its quenching effect and accuracy. The results indicate that through the hot contact bending and die quenching, bending parts with higher strength and forming precision than that of cold stamping can be achieved. And the hot contact bending improves the quenching effect at the bottom of the bending part. The springback of hot contact bending decreases gradually when the blank holder force (BHF) increases, which is mainly negative for the impact of the thermal shrinkage moments. The numerical simulation results are consistent with the experiments’. Therefore, it verifies the reliability of finite element model and lays the foundation for the numerical simulation of the hot stamping process applied in complicated shape parts’ production.
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Johnson, J. W. "Complete Proceedings - Single PDF Download". Coastal Engineering Proceedings 1, nr 8 (29.01.2011): 0. http://dx.doi.org/10.9753/icce.v8.0.
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For the information of those attending their first Congress on Coastal Engineering, I should explain briefly the functions and organization of the Council on Wave Research. The first of these Congresses was held in Long Beach, California, in 1950 under the auspices of the University of California. There was at that time no permanent organization with the responsibility for focusing attention on this area of scientific and technical work or for arranging subsequent meetings. At the suggestion of the late Professor Boris A. Bakhmeteff, the Engineering Foundation, an agency of the American engineering societies, formed the Council on Wave Research to promote research in the sciences related to coastal engineering and to hold occasional congresses and conferences for the purpose of making the results of both scientific research and professional experience available to practicing engineers .
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Milyaeva, Olga, Alexey Bykov i Reinhard Miller. "Characterization of Liquid Adsorption Layers Formed from Aqueous Polymer–Surfactant Solutions—Significant Contributions by Boris A. Noskov". Colloids and Interfaces 7, nr 3 (7.08.2023): 55. http://dx.doi.org/10.3390/colloids7030055.
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In many modern technologies, surface-active compounds, such as surfactants, polymers, proteins, particles and their mixtures, are essential components. They change the dynamic and equilibrium properties of the inherent interfaces, which is mostly visible in foams and emulsions. The interfacial dilational visco-elasticity is probably the most informative quantity due to its direct interrelation to the equation of state of the corresponding interfacial layers as well as the mechanisms governing the interfacial molecular dynamics. The scientific field of interfacial visco-elasticity, although quite young, has been inspired by the pioneering work of Marangoni, Levich, Lucassen, Lucassen-Reynders, Hansen, van den Tempel and Krotov, and during the last decades, also significantly by Boris Noskov. His contributions to the theoretical foundation and experimental analysis of polymer and mixed surfactant–polymer interfacial layers in particular are essential.
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Borunov, A. B. "Cross-Cutting Images as Cyclo-Forming Foundations of the “Fandorin Corps”: Concept of a Ruler". Nauchnyi dialog, nr 12 (31.12.2020): 123–32. http://dx.doi.org/10.24224/2227-1295-2020-12-123-132.
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The image of the tsar is considered as a through cycle-forming one in the Fandorin corpus of Boris Akunin. The results of a comparative analysis of the images of three emperors, with the reign of which Fandorin’s activity chronologically coincides, is presented in the article. The author dwells on the comparison of the images of emperors with the images of tsars in the “Children’s Book for Boys” and the images of revolutionaries, future leaders of Soviet Russia, in the story “Where Should We Go?”. Particular attention is paid to the emphasized inconsistency: the rulers deduced in the texts are by no means regal, their appearance and manners are described in a repulsive manner, and humiliating comparisons are used. The question is raised about the opposition of such an interpretation of the image of the king to an alternative version: a significant absence of the king as a character or a description of a person who is only destined to become a king in the future. The novelty of the research is seen in the fact that the author singles out cyclo-forming motives and their disclosure in texts about Erast Fandorin, attracting not only samples of the detective genre, but also companion texts. The relevance of the study is due to a comprehensive analysis of the vast body of texts and the selection of cross-cutting archetypal images.
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Huang, Kun, Jiye Wu i Yajun Yin. "An Atomistic-Based Nonlinear Plate Theory for Hexagonal Boron Nitride". Nanomaterials 11, nr 11 (18.11.2021): 3113. http://dx.doi.org/10.3390/nano11113113.
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Through the continuity of the DREIDING force field, we propose, for the first time, the finite-deformation plate theory for the single-layer hexagonal boron nitride (h-BN) to clarify the atomic source of the structure against deformations. Divergent from the classical Föppl-von Karman plate theory, our new theory shows that h-BN’s two in-plane mechanical parameters are independent of two out-of-plane mechanical parameters. The new theory reveals the relationships between the h-BN’s elastic rigidities and the atomic force field: (1) two in-plane elastic rigidities come from the bond stretching and the bond angle bending; (2) the bending rigidity comes from the inversion angle and the dihedral angle torsion; (3) the Gaussian rigidity only comes from the dihedral angle torsion. Mechanical parameters obtained by our theory align with atomic calculations. The new theory proves that two four-body terms in the DREIDING force field are necessary to model the h-BN’s mechanical properties. Overall, our theory establishes a foundation to apply the classical plate theory on the h-BN, and the approach in this paper is heuristic in modelling the mechanical properties of the other two-dimensional nanostructures.
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Katermina, Veronika, i Anna Gnedash. "Network Discourse on British Prime Minister Boris Johnson: Positive vs Negative Sentiments on Twitter". Vestnik Volgogradskogo gosudarstvennogo universiteta. Serija 2. Jazykoznanije, nr 4 (sierpień 2022): 59–71. http://dx.doi.org/10.15688/jvolsu2.2022.4.4.
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The article solves the problem of identifying markers of positive or negative sentiment in the network discourse that is formed in social networks in relation to a particular politician. The theoretical and methodological foundations of the study were the basics of network linguistics, the network approach, Big Data. To conduct an empirical study using the method of continuous sampling for the keyword "Boris Johnson", data from the social network Twitter was uploaded from May 15 to July 15, 2021 through the Twitter API service. The received dataset amounted to 1 million 900 thousand messages which were divided into a dataset of messages with a positive sentiment and a dataset of messages with a negative sentiment. In each dataset, frequently used fragments are identified and subjected to linguistic discursive analysis. As a result of their analysis, markers of the positive and negative sentiment of the online discourse that is emerging in the Internet space in relation to British Prime Minister Boris Johnson have been identified. They reflect public opinion, the level of trust in a politician, the pole of evaluation of his activities. Considering such markers when developing strategies for working with public opinion will allow changes in the image and reputational potential of public figures and organizations both online and offline.
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Li, Chi, Zai-Quan Xu, Noah Mendelson, Mehran Kianinia, Milos Toth i Igor Aharonovich. "Purification of single-photon emission from hBN using post-processing treatments". Nanophotonics 8, nr 11 (17.07.2019): 2049–55. http://dx.doi.org/10.1515/nanoph-2019-0099.
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AbstractSingle-photon emitters (SPEs) in hexagonal boron nitride (hBN) are promising components for on-chip quantum information processing. Recently, large-area hBN films prepared by chemical vapor deposition (CVD) were found to host uniform, high densities of SPEs. However, the purity of these emitters has, to date, been low, hindering their applications in practical devices. In this work, we present two methods for post-growth processing of hBN, which significantly improve SPEs in hBN films that had been transferred from substrates used for CVD. The emitters exhibit high photon purities in excess of 90% and narrow linewidths of ~3 nm at room temperature. Our work lays a foundation for producing high-quality emitters in an ultra-compact two-dimensional material system and paves the way for deployment of hBN SPEs in scalable on-chip photonic and quantum devices.
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Kopaliani, Karlo, i Zurab Kvetenadze. "2007 Munich Conference and Contours of the New World Order". Works of Georgian Technical University, nr 2(520) (25.06.2021): 114–26. http://dx.doi.org/10.36073/1512-0996-2021-2-114-126.
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The International Security Conference held in Munich in February 2007 laid the foundation for the formation of the new world order. After the collapse of the Soviet Union and the end of the Cold War, everyone thought that Russia would choose the way for pro-Western democratic development. In the first stage, it seemed that the Russian Federation was making a choice in favor of the free world. However, the weakness of both the state and style of oligarchic governance showed that the conclusion was premature. Although civil society was developing in Russia and after some time it could achieve concrete successes, the Russian political leadership under the leadership of Boris Yeltsin was unable to solve the acute problems facing the state. The strengthening of the Russian state is linked to the coming to power of Yeltsin's successor, Vladimir Putin. As a result of effective counterterrorism operations, the authority of Russian president has increased significantly. Putin aimed to change pro-Western orientations to Eurasian. We think, it was a natural occurrence for Russia, but it would inevitably lead to a confrontation with the West. The 2007 Munich International Security Conference is a clear example, where the Russian president strongly criticized the existence of a unipolar world and initiated foundation of a new phase of confrontation with the Euro-Atlantic space.
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Raykar, Neha, Japneet Kaur i Tom Newton-Lewis. "Testing the Impact of Layered Health and Nutrition Interventions in Rajasthan, India: Baseline Findings on Birthweight". Current Developments in Nutrition 4, Supplement_2 (29.05.2020): 894. http://dx.doi.org/10.1093/cdn/nzaa053_099.
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Abstract Objectives The Children's Investment Fund Foundation (CIFF) in partnership with the Government of Rajasthan seeks to reduce prevalence of low birthweight through multi-faceted interventions to strengthen existing delivery of services during pregnancy continuing into early childhood. We employed a quasi-experimental matched case design with matching at district, block, and sub-center level to enable a difference-in-difference estimation of impact of the interventions at endline. Methods We conducted a retrospective baseline survey of mothers with children under three years in 2018 to assess prevalence of low birthweight in six districts of Rajasthan. Primary household survey data was collected on 8583 mothers with children under the age of three years and 2406 currently pregnant women. Birthweight records of 5702 children under three years were collected from public facilities where the children were reported to be delivered by the mothers surveyed. Results Matching facility birthweight records of children born to mothers in the sample confirmed heaping of data, consistent with studies from developing countries that rely on administrative or secondary sources of birthweight records. We observed heaping of birthweight readings around multiples of 500 gms; 23% of the new-borns weighed 2.5 kgs and 19% weighed 3 kgs. Possible reasons for misreporting include malfunctioning or mis calibrated spring scales, manual data entry errors in the labor room registers, poor knowledge of optimal weighing practices and misclassification of low birthweight new-borns as normal birthweight. Conclusions Concerns with reliance on facility records for the key impact indicator have highlighted the need for standardisation of birthweight measurement at public delivery facilities. All public delivery facilities in the evaluation's treatment and control areas will receive digital weighing scales in labor rooms, along with training and mentoring of labor room staff based on a standardised protocol. This has implications for endline assessment of impact - average birthweight (continuous variable) will be used as the primary outcome for difference-in-difference impact estimation at endline. Changes in prevalence of low birthweight will only be tested using endline sample conditional on baseline equivalence. Funding Sources Children's Investment Fund Foundation.
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Karyakin, O. B. "Irene Joliot-Curie, Frederic Joliot-Curie". Cancer Urology 17, nr 3 (11.11.2021): 165–68. http://dx.doi.org/10.17650/1726-9776-2021-17-3-165-168.
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Irene Joliot-Curie is the daughter of Marie Curie, a double Nobel Prize-winner. In 1925, Irene Curie became Doctor of Science.In 1926, Irene married her colleague Frederic Joliot, an assistant at the Radium Institute. With him, she continued experiments with various chemical elements. In some of these experiments, Irene and Frederic performed bombardment of boron, and aluminium with alpha particles, thereby producing new chemical elements. These new elements were radioactive: aluminum became radioactive phosphorus, while boron became a radioactive isotope of nitrogen. Within a short time, Joliot-Curie created many new radioactive elements. In 1935, Irene and Frederic Joliot-Curie were jointly awarded the Nobel Prize for Chemistry for their artificial creation of new radioactive elements Working with uranium in the late 1930s, Irene Joliot-Curie made several important discoveries and came close to the discovery of uranium decay, when bombarded with neutrons.Jean Frederic Joliot was born in Paris, in the family of a prosperous merchant Henri Joliot and Emilia (Roederer) Joliot, who came from a wealthy Protestant family from Alsace.Frederic obtained his Doctor of Science degree in 1930 for a thesis on the electrochemistry of radioactive polonium. Having received the Nobel Prize in 1935 together with his wife, 35-year-old Frederick still remains the youngest Nobel Laureate in Chemistry.The discoveries and achievements of the Joliot-Curie family laid the foundation for further research in nuclear physics, chemistry, and nuclear medicine. Without their discoveries, it is impossible to imagine modern science and everyday life.
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Geeraert, Dustin. "“In the Shadow of Greater Events in the World:” The Northern Epic in the Wake of World War II". Scandinavian-Canadian Studies 26 (1.12.2019): 240–75. http://dx.doi.org/10.29173/scancan170.
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ABSTRACT: World War II was marked by widespread use of heroic narratives, national legacies, and grand ideas about destiny or the “arc of history.” These topics have a firm foundation in medieval literature, particularly in northern traditions. While literary medievalism had been in the limelight during the nineteenth century, during the early twentieth century it had been dismissed as a quaint curiosity; suitable for the benighted souls of the reading public, perhaps, but not to be taken seriously by avant-garde intellectuals. In the mid-twentieth century, however, literary medievalism returned with a vengeance. Questioning the critical narrative of twentieth-century literary history, this article examines iconoclastic works by Halldór Laxness (Iceland), T. H. White (England), John Gardner (America), and the Strugatsky brothers (Arkady and Boris, Russia), in order to compare perspectives on medievalism from different countries in the aftermath of the bloodiest conflict of all time.
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Toth, Milos, i Igor Aharonovich. "Single Photon Sources in Atomically Thin Materials". Annual Review of Physical Chemistry 70, nr 1 (14.06.2019): 123–42. http://dx.doi.org/10.1146/annurev-physchem-042018-052628.
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Layered materials are very attractive for studies of light–matter interactions at the nanoscale. In particular, isolated quantum systems such as color centers and quantum dots embedded in these materials are gaining interest due to their potential use in a variety of quantum technologies and nanophotonics. Here, we review the field of nonclassical light emission from van der Waals crystals and atomically thin two-dimensional materials. We focus on transition metal dichalcogenides and hexagonal boron nitride and discuss the fabrication and properties of quantum emitters in these systems and proof-of-concept experiments that provide a foundation for their integration in on-chip nanophotonic circuits. These experiments include tuning of the emission wavelength, electrical excitation, and coupling of the emitters to waveguides, dielectric cavities, and plasmonic resonators. Finally, we discuss current challenges in the field and provide an outlook to further stimulate scientific discussion.
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Arani, Ali Ghorbanpour, Seyed Abolfazl Mortazavi i Zahra Khoddami Maraghi. "Dynamic stability of nanocomposite viscoelastic cylindrical shells coating with a piezomagnetic layer conveying pulsating fluid flow". Science and Engineering of Composite Materials 24, nr 3 (1.05.2017): 401–14. http://dx.doi.org/10.1515/secm-2015-0369.
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AbstractIn this study, the dynamic stability of an embedded viscoelastic composite cylindrical shell reinforced by boron nitride nanotubes (BNNTs) is investigated. The composite cylindrical shell is coated by a viscoelastic piezomagnetic layer and subjected to combined magneto-electro-mechanical loads. The composite polymer matrix and the coating layer are made of polyvinylidene fluoride (PVDF) and iron oxide (CoFe2O4), respectively. The composite cylindrical shell conveys pulsating fluid flows, which results in harmonic oscillations. The equivalent characteristics of composite are determined using micro-electro-mechanical models. Considering the magneto-electro-mechanical coupling, motion equations are obtained using Hamilton’s principle. Results show the influences of fluid velocity, geometrical parameters of shell, viscoelastic foundation, orientation angle and percentage of BNNTs on the resonance frequency and stability of a PVDF-coated nanocomposite shell. The result of this study may be used for the design of rotating machines, hydraulic systems and motors.
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Liu, Wei Kai, Ming Xing Song, Zi Yi Xu i Xue Hong Zhang. "The Analysis of Horizontal Extension Capability in Horizontal Wells". Advanced Materials Research 1010-1012 (sierpień 2014): 1745–49. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.1745.
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It is critical to understand whether the available drilling assembly could meet the requirements of drilling design during the design and drilling of horizontal wells. This paper pointed out several limitations on horizontal extension capability of horizontal wells and provided judging criteria of the limit of horizontal extension based upon the characteristics of horizontal wells, and set up the gap element model analyzing torque and dragged of whole drill strings in horizontal wells. According to the force analysis of drill strings in bores given the foundation for regularities in the distribution of torque and drag force along the axis, on the basis of those above mentioned models and theories, a software was made to calculate the torque and drag force of a well, which compared with the field data, the average discrepancies of theoretical values are below 20% that could meet the needs in field works.
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Burmistrov, Konstantin. "“Kabbalah as a Special Type of Religious Consciousness”. Speech by Boris Stolpner at the Moscow Religious and Philosophical Society in Memory of Vladimir Solovyov". Otechestvennaya Filosofiya 1, nr 1 (lipiec 2023): 64–76. http://dx.doi.org/10.21146/3034-1825-2023-64-76.
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The ideological foundations of Judaism and Jewish thought rarely became the subjects of special discussion among the philosophers of the Russian Silver Age. Archival documents, which are published for the first time in this article, refer to such a rare case when the greatest Russian thinkers of that time – P.A. Florensky, S.N. Bulgakov, V.I. Ivanov and others – publicly discussed the essence of Jewish mysticism at a special meeting of the philosophical society. Boris Stolpner's report "Kabbalah as a Special Type of Religious Consciousness", read in April 1914, caused a lively discussion, the content of which we can get acquainted with due to the accidentally preserved notes of Sergei Durylin. The publication of these materials will significantly expand our understanding of the interest in Jewish thought among Russian philosophers of the early twentieth century.
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Mohammadimehr, Mehdi, S. Javad Atifeh i Borhan Rousta Navi. "Stress and free vibration analysis of piezoelectric hollow circular FG-SWBNNTs reinforced nanocomposite plate based on modified couple stress theory subjected to thermo-mechanical loadings". Journal of Vibration and Control 24, nr 15 (8.05.2017): 3471–86. http://dx.doi.org/10.1177/1077546317706887.
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In this article, stresses and free-vibration behaviors of annular circular piezoelectric nanocomposite plate reinforced by functionally graded single-walled boron nitride nanotubes (FG-SWBNNTs) embedded in an elastic foundation based on modified couple stress theory (MCST) are explored. The mechanical properties of FG-SWBNNT-reinforced nanocomposite plate are assumed to be graded in the direction of thickness and estimated through the micro-mechanical approach. The governing equations are obtained using the energy method. The natural frequencies and stresses of FG-SWBNNT-reinforced nanocomposite plate are computed using the differential quadrature method (DQM). An excellent agreement is observed between the obtained results and the results in the literature. Influences of the internal radius to the external radius, the thickness to the internal radius ratio, the material length scale parameter, the functionally graded parameter, temperature changes and elastic coefficients on the natural frequencies and stresses of the hollow circular nanocomposite plate are investigated. The results of this research show that the natural frequencies of the piezoelectric nanocomposite plate increase by increasing the material length scale parameter, the elastic foundation parameters, the ratio of the inner radius to the outer radius, the ratio of the thickness to the inner radius, and decreasing the power index and temperature change. The radial stress of the nanocomposite plate varies proportionally to its mode shape. The results can be employed to design smart structures in micro-electro-mechanical systems (MEMS).
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Yeow, S. C., H. Chanson i H. Wang. "Impact of a large cylindrical roughness on tidal bore propagation". Canadian Journal of Civil Engineering 43, nr 8 (sierpień 2016): 724–34. http://dx.doi.org/10.1139/cjce-2015-0557.
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A tidal bore is a hydrodynamic shock, surging upstream in some shallow-water bays and estuaries during the flood tide under large tidal range. This study investigates experimentally the propagation of tidal bores over a large cylindrical roughness element, representative of damaged bridge pier foundation. In the initially steady flow, the large cylindrical element generated a wake region, with extents comparable to steady flow literature. During the tidal bore propagation, the presence of the element had negligible effect on the free-surface properties, but a significant impact in terms of the instantaneous velocity and Reynolds stresses. This resulted in longer transient recirculation both upstream and downstream of the element and larger maximum velocity recirculation magnitudes, as well as enhanced turbulent stress levels and potential bed erosion around the large element, within two diameters from the element centre. The results showed the potential development of a large scour hole around the cylindrical element.
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Lee, Chien-Lin, Tai-Chao Chang i Chia-Ming Chang. "Quantum Chemical Studies on the Adsorption of Hexachlorobenzene, Decachlorobiphenyl, Benzene, and Biphenyl by BN-Doped Graphene and C-Doped Hexagonal Boron Nitride Modified with β-Cyclodextrin". Crystals 13, nr 2 (3.02.2023): 266. http://dx.doi.org/10.3390/cryst13020266.
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In this study, the adsorption of aromatic organic pollutants such as hexachlorobenzene, decachlorobiphenyl, benzene, and biphenyl by 2D nanomaterials was investigated using quantum chemical methods. The calculation results include reaction enthalpies, non-covalent intermolecular and intramolecular interactions, optimized structures, hydrogen bonds, and molecular electrostatic potentials. Fukui’s FMO electrophile sensitivity is used to predict the most reactive positions on the chemical species for both nucleophilic and electrophilic roles. The results of hard–soft acid-base reactivity descriptors show that the electronic structures of BN-doped graphene and C-doped hexagonal boron nitride depend on the degree of doping and the modification of β-cyclodextrin. C doping helps to significantly improve the conductivity of h-BN, and β-cyclodextrin enhances the binding stability of aromatic organic pollutants. Hydrogen bonding between β-cyclodextrin and chlorine-substituted compounds can enhance non-covalent interactions. In particular, the high adsorption capacity and electron transfer capacity of decachlorobiphenyl laid the foundation for the development of new sensors.
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Jun, Ah Hyun, Young Hyun Hwang, Byeongwoo Kang, Seungwon Lee, Jiwon Seok, Jong Seong Lee, Seo Hyun Song i Byeong-Kwon Ju. "Magnetic Properties of Amorphous Ta/CoFeB/MgO/Ta Thin Films on Deformable Substrates with Magnetic Field Angle and Tensile Strain". Sensors 23, nr 17 (28.08.2023): 7479. http://dx.doi.org/10.3390/s23177479.
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Recently, the application of cobalt iron boron (CoFeB) thin films in magnetic sensors has been widely studied owing to their high magnetic moment, anisotropy, and stability. However, most of these studies were conducted on rigid silicon substrates. For diverse applications of magnetic and angle sensors, it is important to explore the properties of ferromagnetic thin films grown on nonrigid deformable substrates. In this study, representative deformable substrates (polyimide (PI), polyethylene naphthalate (PEN), and polydimethylsiloxane (PDMS)), which can be bent or stretched, were used to assess the in-plane magnetic field angle-dependent properties of amorphous Ta/CoFeB/MgO/Ta thin films grown on deformable substrates. The effects of substrate roughness, tensile stress, deformable substrate characteristics, and sputtering on magnetic properties, such as the coercive field (Hc), remanence over saturation magnetization (Mr/Ms), and biaxial characteristics, were investigated. This study presents an unconventional foundation for exploring deformable magnetic sensors capable of detecting magnetic field angles.