cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
FATORES CONDICIONANTES DA GESTÃO DE RISCOS DE CAFEICULTORES DO SUL DE MINAS GERAIS
Conditioning Factors in the Risk Management by Coffee Farmers in the South of Minas Gerais State, Brazil
Creators: name: Costa, Cássio Henrique Garcia
name: Castro Júnior, Luiz Gonzaga
name: Callegario, Cristina Lelis Leal
name: Andrade, Fabrício Teixeira
name: De Oliveira, Diego Humberto
name: Costa, Cássio Henrique Garcia
name: Castro Júnior, Luiz Gonzaga
name: Callegario, Cristina Lelis Leal
name: Andrade, Fabrício Teixeira
name: De Oliveira, Diego Humberto
Publisher: name: Unknown
Year: 2015
Subjects: subject: Crop Production/Industries
subject: Farm Management
subject: Risk and Uncertainty
subject: Condicionantes
subject: gestão de riscos
subject: cafeicultura
subject: Sul de Minas Gerais
subject: Constraints
subject: risk management
subject: coffee
subject: southern Minas Gerais

description: O objetivo principal deste estudo é verificar as práticas adotadas pelos produtores de café para gerenciar riscos, bem como, identificar quais são os fatores condicionantes da gestão de riscos dos cafeicultores do Sul de Minas Gerais. A metodologia utilizada baseia-se na estimação do modelo logit binomial. Conclui-se que apesar do grande potencial de auxílio ao processo de gestão das propriedades cafeeiras a gestão de riscos não faz parte da realidade da maioria dos cafeicultores estudados. Ainda é pequeno o número de produtores que realizam a gestão financeira e menor ainda o percentual que planeja a comercialização da produção e que se utiliza de ferramentas ligadas ao mercado futuro. Os principais fatores condicionantes do gerenciamento de riscos dos cafeicultores do Sul de Minas Gerais são a escolaridade, o número de funcionários contratados, e a adoção da tecnologia da informação. Aumentos da renda e da produtividade, a diversificação das atividades nas propriedades e a participação em cursos e treinamentos também são positivamente relacionados à gestão de riscos. ----- The aim of this study is to verify the practices adopted by coffee farmers to manage risk and identify which are the conditioning factors of risk management of farmers in southern Minas Gerais. A metodologia utilizada baseia-se na estimação do modelo logit binomial. Conclui-se que apesar do grande potencial de auxílio ao processo de gestão das propriedades cafeeiras a gestão de riscos não faz parte da realidade da maioria dos cafeicultores estudados. Is still small number of producers who perform financial management and even smaller percentage that plans to market the production and uses mechanisms linked to the futures market. The main determining factors of risk management of coffee farmers in southern Minas Gerais are schooling, the number of hired employees, and the adoption of information technology. Increases in income and productivity, diversification of activities on the properties and participation in courses and training are also positively related to risk management.
Spin textures in chiral magnetic monolayers with suppressed nearest-neighbor exchange
Creators: name: Menezes, Raí M.
name: Silva, Clécio C. de Souza
name: Milošević, Milorad V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: High tunability of two dimensional magnetic materials (by strain, gating, heterostructuring or otherwise) provides unique conditions for studying versatile magnetic properties and controlling emergent magnetic phases. Expanding the scope of achievable magnetic phenomena in such materials is important for both fundamental and technological advances. Here we perform atomistic spin-dynamics simulations to explore the (chiral) magnetic phases of atomic monolayers in the limit of suppressed first-neighbors exchange interaction. We report the rich phase diagram of exotic magnetic configurations, obtained for both square and honeycomb lattice symmetries, comprising coexistence of ferromagnetic and antiferromagnetic spin-cycloids, as well as multiple types of magnetic skyrmions. We perform a minimum-energy path analysis for the skyrmion collapse to evaluate the stability of such topological objects, and reveal that magnetic monolayers could be good candidates to host the antiferromagnetic skyrmions that are experimentally evasive to date.
Defining Participatory Media as Gamespace: Digital Games, Remix, and the Materiality of Gamespace
Creators: name: Plothe, Theo
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 4701
subject: Communication and media studies

description: While the digital game industry is one of the largest, most popular, and profitable form of entertainment media, their role in American popular culture is often dismissed. As James Paul Gee (2007) argues, games can aid in cognitive development in ways that traditional education cannot. The impact and influence of digital games, however, is usually only noticed in moments of transgression, when actions that would be acceptable in the gamespace occur in the physical world. These reasons are not only woefully inadequate to help the public understand the complex role of games in society, they are also reductive in considering gamespace. While many scholars focus on these moments of transgression, we cannot understand what constitutes a transgressive act until we better define gamespace. This project, therefore, takes up these questions by theorizing gamespace for the age of media convergence, considering how gamespace expands through participatory culture. This study takes up these questions through an exploration of definitions of gamespace and a uses a three-pronged approach: 1) interviews with creators of this participatory media, 2) focus groups with gamers who consume, share, and discuss this media, and 3) a large survey of the gaming community. This dissertation examines the larger cultural impact of digital games through an investigation of the concept of “gamespace” in games and the importance of participatory media in extending this gamespace beyond the game itself into other media through the process of convergence. The medium of digital games, this project argues, allows for an extension of gamespace into digital participatory media. Games are playful and built for interaction; this interaction, supports a participatory mindset, encouraging gamers to continue to play with the digital game content. Through this work, I argue that digital games are at the forefront of innovations redefining individuals’ relationships to participatory and interactive media.
title: Методы оптимизации сложных систем
Creators: name: ELS IPR BOOKS
Publisher: name: Санкт-Петербургский государственный университет промышленных технологий и дизайна
Year: 2017

description: Учебное пособие содержит краткое изложение разделов теории, охватывающих вопросы разработки моделей и методы получения оптимальных решений. Это линейное и нелинейное программирование, оптимальное управление на базе принципа максимума, динамическое программирование. Одна из глав посвящена классическому вариационному исчислению как фундаменту ряда современных методов оптимизации. В качестве основной сферы приложений предполагается разработка автоматизированных систем управления. Предназначено для студентов, обучающихся по направлению 15.04.04 – Автоматизация технологических процессов и производств.
Cryptography using generalized Fibonacci matrices with Affine-Hill cipher
Creators: name: Prasad, Kalika
name: Mahato, Hrishikesh
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: Combinatorics (math.CO)
subject: Number Theory (math.NT)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 11T71, 11B39, 14G50, 68P30, 68R01, 94A60

description: In this article, we have proposed a public key cryptography using Affine-Hill cipher with a generalized Fibonacci matrix(called multinacci matrix). Also proposed a key establishment(exchange of key matrix $K=Q_λ^{k}$ of order $λ\timesλ$ for encryption-decryption) scheme with the help of multinacci sequences under prime modulo. In this scheme, instead of exchanging key matrix, we need to exchange the only pair of numbers $(λ, k)$, which reduces the time complexity as well as space complexity and comes with a large key-space.
description: Construction, development and efficiency
Rotation-activity relations and flares of M dwarfs with K2 long- and short-cadence data
Creators: name: Raetz, St.
name: Stelzer, B.
name: Damasso, M.
name: Scholz, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using light curves obtained by the K2 mission, we study the relation between stellar rotation and magnetic activity with special focus on stellar flares. Our sample comprises 56 bright and nearby M dwarfs observed by K2 during campaigns C0-C18 in long- and short-cadence mode. We derive rotation periods for 46 M dwarfs and measure photometric activity indicators such as amplitude of the rotational signal, standard deviation of the light curves, and the basic flare properties (flare rate, flare energy, flare duration, and flare amplitude). We found 1662 short-cadence flares, 363 of which have a long-cadence counterpart with flare energies of up to $5.6\cdotp10^{34}$erg. The flare amplitude, duration, and frequency derived from the short-cadence light curves differ significantly from those derived from the long-cadence data. The analysis of the short-cadence light curves results in a flare rate that is 4.6 times higher than the long-cadence data. We confirm the abrupt change in activity level in the rotation-activity relation at a critical period of ~10d when photometric activity diagnostics are used. This change is most drastic in the flare duration and frequency for short-cadence data. Our flare studies revealed that the highest flare rates are not found among the fastest rotators and that stars with the highest flare rates do not show the most energetic flares. We found that the superflare frequency ($E\geq5\cdotp10^{34}$erg) for the fast-rotating M stars is twice higher than for solar like stars in the same period range. By fitting the cumulative FFD, we derived a power-law index of $α=1.84 \pm 0.14$, consistent with previous M dwarf studies and the value found for the Sun.
description: 23 pages, 26 figures, 7 tables
title: Factors that contribute to the pathogenesis of dengue in adult patients in Vietnam
Creators: name: Nguyen, Van Vinh Chau
Publisher: name: The Open University
Year: 2009

description: Dengue fever and dengue hemorrhagic fever (DF /DHF) are caused by the dengue viruses, which belong to family Flaviviridae. DHF incidence has been increasing globally in the last 40 years. Over half the world's population lives in areas potentially at risk for dengue transmission, making dengue the most important human viral disease transmitted by arthropod vectors in terms of morbidity and mortality. Recently, the age distribution of DHF cases in Asia has changed. The number of adults with DHF has increased since the 1990s in Southeast Asian countries including Viet Nam. A series of studies were conducted in the Hospital for Tropical Diseases, Ho Chi Minh City, Viet Nam on clinical manifestations, cytokine production in acute infection and T cell responses in adult dengue patients.
Observation of narrow fluorescence from doubly driven four-level atoms at room temperature
Creators: name: Khan, Uday Kumar
name: Sebastian, Jimmy
name: Kamaraju, N.
name: Narayanan, Andal
name: Srinivasan, R.
name: Ramachandran, Hema
Publisher: name: arXiv
Year: 2004
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: Unusually narrow fluorescence peaks are seen from Rubidium-85 atoms under the action of two driving laser fields that are in a three dimensional molasses configuration. One of the lasers is held at a fixed detuning from the "cooling" transition, while the other is scanned across the "repumping" transitions. The fluorescence peaks are split into symmetric pairs, with the seperation within a pair increasing with the detuning of the cooling laser. For large detunings additional small peaks are seen. A simple model is proposed to explain these experimental observations.
description: 8 pages, 4 figures, needs epl.cls
CADEIAS CURTAS, COOPERAÇÃO E PRODUTOS DE QUALIDADE NA AGRICULTURA FAMILIAR – o Processo de Relocalização da Produção Agroalimentar em Santa Catarina
Short Food Supply Chains, Cooperation and Quality Products in the Family Farming – The Process of Agrifood Production Relocalization in Santa Catarina, Brazil
Creators: name: Schneider, Sérgio
name: Ferrari, Dilvan Luiz
name: Schneider, Sérgio
name: Ferrari, Dilvan Luiz
Publisher: name: Unknown
Year: 2015
Subjects: subject: Community/Rural/Urban Development
subject: Industrial Organization
subject: Marketing
subject: FOS: Economics and business
subject: Produtos artesanais
subject: enraizamento
subject: cadeias curtas
subject: agricultura familiar
subject: Small scale products
subject: rooting
subject: short chains
subject: family farming

description: Este artigo tem por objetivo analisar a emergência de novos mercados alimentares de qualidade identificados a partir da reconexão das relações entre produtor e consumidor que surge a partir da construção de cadeias agroalimentares curtas. Essas cadeias se caracterizam por enraizar práticas alimentares em relações eco-social locais, criando novos espaços econômicos. Problematizam-se as noções de qualidade e produto local enquanto esquemas de produção de confiança dos consumidores em relação aos produtos com identidade cultural e enraizamento territorial. O procedimento metodológico adotado foi o estudo de caso através de pesquisa documental, observação participante e entrevistas em profundidade com agricultores, líderes e outros agentes do meio rural. A análise indica que a inter-relação entre pessoas, produtos e lugar é que dão distintividade aos produtos com qualidades específicas atuando na ressocialização e relocalização de alimentos. Os empreendimentos de agregação de valor e suas circundantes redes de cooperação propiciam a criação de novos espaços econômicos e novas formas de inserção nos mercados repercutindo na ampliação da autonomia dos agricultores familiares e suas organizações. ----- The purpose of this study was to analyse the rising of new quality food markets identified from the reestablishment of the relationship between growers and consumers, which rises from the development of short food supply chains. These chains were characterized by rooting food practices during local eco-social relationships, creating new economic spaces. Quality notions and local product were problematized while reliable production schemes of the consumers in relation to products with cultural identity and territorial rooting. A case study was adopted by means of literature review, participative observation and deep interview involving growers, leaders and other interveners in the countryside. According to results, relationship among people, products and places shows distinctiveness for products containing specific qualities, acting in the food ressocialization and localization. Value-adding undertakings, and their surrounding cooperation networks, propitiate the creation of new economic spaces and new insertion ways in the marketing, having influence upon the autonomy ampliation of the family farmers and their organizations.
title: Модная иллюстрация
Creators: name: ELS IPR BOOKS
Publisher: name: Санкт-Петербургский государственный университет промышленных технологий и дизайна
Year: 2019

description: Учебное пособие «Модная иллюстрация» предназначено для развития графических навыков студента применительно к условиям будущей профессиональной деятельности дизайнера одежды. Модная иллюстрация – одна из категорий восприятия композиции костюма. Данное пособие представляет собой анализ, методы, приёмы модной графики и широкий диапазон применения в дизайне одежды. В пособии рассмотрены теоретические основы композиции, этапы творческого процесса, методы и специфика художественного проектирования костюма как объекта дизайна. Прослеживается взаимосвязь дизайна костюма с графическим дизайном. Раскрываются и объясняются важнейшие явления и закономерности цвета применительно к требованиям дизайнера костюма. Каждый визуальный пример по своему уникален и может быть использован в различных дисциплинах подготовки магистров по направлению 54.03.01 «Дизайн». Даны все термины и определения, и принятые условные обозначения, характерные для представленного учебного пособия.
Space-Time Evolution of Ultrarelativistic Quantum Dipoles in Quantum Electrodynamics
Creators: name: Blok, B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss space-time evolution of ultrarelativistic quantum dipole in QED. We show that the space-time evolution can be described, in a certain approximation, by means of a regularized wave function, whose parameters are determined by the process of the dipole creation by a local current. We derive using these wave functions the dipole expansion law, that is found to coincide parametrically in the leading order with the one suggested by Farrar, Frankfurt,Liu and Strikman.
description: 15 pages
THERAPY-SEEKING ATTITUDES AND RACIAL PREFERENCES FOR THERAPISTS: DIFFERENCES BETWEEN AFRICAN AMERICANS AND CAUCASIAN AMERICANS
Creators: name: Howell, Trinity
Publisher: name: American University
Year: 2023

description: While the effects of negative attitudes on therapy and therapy-seeking and client/therapist racial matching have been widely researched, the findings are mixed and have yet to conclude if there are differences between African American and Caucasian American attitudes. The current study seeks to better understand how African American and Caucasian American participants differ in their attitudes toward therapy, therapy-seeking, and desires for a racially similar therapist. Procedure: Participants were recruited online via MTurk and participated in 2 Implicit Association Tests and 1 Questionnaire. Results: While there was no difference between the groups in terms of implicit or explicit attitudes toward therapy or therapy-seeking, on average, African Americans had neutral implicit attitudes toward race of therapist, but were more likely to explicitly prefer a similarly raced therapist than Caucasian Americans. The more negative an attitude toward therapy, the more a participant of either race preferred a similarly raced therapist.
The peculiar type Ib supernova 2005bf: explosion of a massive He star with a thin hydrogen envelope?
Creators: name: Anupama, G. C.
name: Sahu, D. K.
name: Deng, J.
name: Nomoto, K.
name: Tominaga, N.
name: Tanaka, M.
name: Mazzali, P. A.
name: Prabhu, T. P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present BVRI photometry and optical spectroscopy of SN 2005bf near light maximum. The maximum phase is broad and occurred around 2005 May 7, about forty days after the shock breakout. SN 2005bf has a peak bolometric magnitude M_{bol}=-18.0\pm 0.2: while this is not particularly bright, it occurred at an epoch significantly later than other SNe Ibc, indicating that the SN possibly ejected ~0.31 M_{sun} of 56Ni, which is more than the typical amount. The spectra of SN 2005bf around maximum are very similar to those of the Type Ib SNe 1999ex and 1984L about 25-35 days after explosion, displaying prominent He I, Fe II, Ca II H & K and the near-IR triplet P Cygni lines. Except for the strongest lines, He I absorptions are blueshifted by
description: 13 pages, 4 figures. Accepted for publication in ApJ (Letters)
title: Модные тенденции
Creators: name: ELS IPR BOOKS
Publisher: name: Санкт-Петербургский государственный университет промышленных технологий и дизайна
Year: 2019

description: Модные тенденции – есть одна из категорий восприятия костюма. Интегрированная учебная программа по модным тенденциям для магистров воспроизводит определенные идеи и закономерности в одежде, изучает силуэты костюма, характерные для того или иного исторического периода. Необходимость в прогнозировании модных тенденций связана в первую очередь со взаимной заинтересованностью дизайнеров и промышленных групп в экономическом успехе. Критериями эффективности реализации педагогической модели профессионального образования по данной дисциплине, в основу которой положена разработанная и экспериментально подтвержденная программа, являются: высокий уровень осмысления и применения достижений истории искусства и инноваций модной индустрии, отражение утилитарной и эстетической функции в костюме. Каждый визуальный пример по-своему уникален и может быть использован в различных дисциплинах подготовки магистров по направлению 54.03.01 «Дизайн». В пособии четко сформулированы цели, разнообразные приемы и методы выполнения заданий дисциплины, широкий диапазон применения. Даны все термины и определения и принятые условные обозначения, характерные для представленного учебного пособия. Предназначено для развития аналитического мышления студентов применительно к условиям профессиональной деятельности дизайнера костюма.
Quark-mass dependence of baryon resonances
Creators: name: Lutz, M. F. M.
name: García-Recio, C.
name: Kolomeitsev, E. E.
name: Nieves, J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the quark-mass dependence of J^P = \frac12^- s-wave and J^P = \frac32^- d-wave baryon resonances. Parameter-free results are obtained in terms of the leading order chiral Lagrangian. In the 'heavy' SU(3) limit with m_π=m_K \simeq 500 MeV the s-wave resonances turn into bound states forming two octets plus a singlet representations of the SU(3) group. Similarly the d-wave resonances turn into bound states forming an octet and a decuplet in this limit. A contrasted result is obtained in the 'light' SU(3) limit with m_π=m_K \simeq 140 MeV for which no resonances exist.
description: 8 pages, three figures, talk presented at HYP2003
SIMULAÇÕES DE RAZÕES ÓTIMAS DE HEDGE PARA A UVA EXPORTADA BRASILEIRA
Simulations of Optimal Hedge Ratios for the Brazilian Exported Grape
Creators: name: Oliveira, Abdinardo Moreira Barreto
name: Dos Santos, Joséte Florencio
name: Oliveira, Abdinardo Moreira Barreto
name: Dos Santos, Joséte Florencio
Publisher: name: Unknown
Year: 2015
Subjects: subject: Crop Production/Industries
subject: Marketing
subject: FOS: Economics and business
subject: Risk and Uncertainty
subject: Risco de Preço
subject: Modelo ARIMA
subject: Abordagens de Hedging
subject: Price risk
subject: ARIMA model
subject: Hedging approach

description: Num estudo exploratório anterior, Ferreira e Sampaio (2009) encontraram uma predisposição dos fruticultores para a implantação de um mercado de futuros para a uva e a manga exportada brasileira. Entretanto, uma das limitações desse estudo foi a ausência das razões de hedge que melhor atendessem às demandas daqueles fruticultores envolvidos. Objetivou-se neste artigo identificar, por simulação, as razões ótimas de hedge que seriam efetivas na diminuição do risco de preço da uva exportada brasileira, via mercado de futuros. Coletaram-se 300 preços médios mensais US$ FOB/kg entre 1989 e 2013 no site AliceWeb2. Utilizou-se o modelo de previsão ARIMA para simular os preços futuros. Construíram-se 48 cenários para cada abordagem de hedging empregada no estudo: Variância Mínima e Média-Variância. Identificou-se que os contratos futuros, com vencimento de 03 e 06 meses apresentaram, as melhores médias na efetividade do hedge (26% e 20%, respectivamente), com razões ótimas de hedge de 91,6% e 66,4%, em posições vendidas. Estes resultados, portanto, coincidem com o prazo de armazenagem de 01 a 06 meses em packing houses, mostrando assim o aparecimento de uma ligação entre aspectos operacionais e financeiros que viabilizariam o contrato futuro da uva exportada brasileira. ----- In an early exploratory study, Ferreira and Sampaio (2009) found a predisposition of fruit-growers for the implementation of a future market for the Brazilian exported grape and mango. However, one of limitations they faced was the absence of hedge ratios which could better meet their demands. By using simulation, we performed this work aiming to identify optimal hedge ratios which would be effective in reducing the price risk of Brazilian exported grape via future market. By searching on the AliceWeb2 website, we obtained 300 monthly means of FOB price per kilogram, estimated in US dollar, from 1989 to 2013. An ARIMA forecasting model was used to simulate future prices. Forty-eight scenarios were established for each hedging approach, namely, Minimum Variance and Mean-Variance. Future contracts expiring in three and six months were found to show better means of hedge effectiveness, about 26% and 20%, respectively, with optimal hedge ratio of about 91.6% and 66.4% in short position. These results were according to the storage term from one to six months in packing houses, showing the appearance of a link between operational and financial aspects, which serve the future contract of Brazilian exported grape.
Corn Improvement Programme - Ministry of Agriculture and Lands, Jamaica
Creators: name: Martin, E. R. H.
name: Martin, E. R. H.
Publisher: name: Unknown
Year: 1966
Subjects: Crop Production/Industries
Land Economics/Use

description: Corn seed improvement in Jamaica by modern methods was initiated in the early 1940's by L. N. H. Larter who isolated a yellow segment from the widely grown Jamaica Red Corn. This yellow strain is the JSY, still the prevailing variety in the island. After the war, work was vLr tua Lly suspended until 1957 when the writer studied improvement methods with I.C.A. assistance in the U.S.A. and later in Mexico with the Rockefeller foundation Mission. In 1963, government appo:inted a part-time Consultant, Mr. F. Poey, who is associated with a Company producing tropical corn hybrids. This Division has also drawn freely on assistance willingly given by the Pioneer Hi-Bred Corn Company, now operating a station in Jamaica. 1. Variety Testing - Following the usual pattern in which promising commercial and experimental material is tested against local standards. 2. Controlled Mass Selection - Recommended by the Rockefeller Foundation for application to specially prepared Composite Material with a high level of initial performance and considerable additive genetic var La nce for further improvement in yield and adaptation. 3. Inbreeding of available material - Inbreds from a wide variety of material to be used in a Hybrid programme, for Top Crosses and for preparing Synthetics. Early testing of TopCross performance. 4. Making of Twin-Eared Composite - To be used as a commercial variety if of sufficiently high performance after selection, or for crossing with other material. 5. Exploratory work with Sweet Corn - (a) Using crosses between selected tropical strains of field corn and the DR-50 Sweet Corn. (b) Selection wii:hin a Sweet Corn Composite supplied to us by Pioneer Hi-Bred Corn Company. 6. Spacing and Plant-Population Trials - Following on earlier 􀀀w􀀀~􀀀r􀀀k by R. F. Innes and also recent trends abroad in which higher populations are giving promising results.
Phase diagram of a surface superconductor in parallel magnetic field
Creators: name: Dimitrova, Ol'ga V.
name: Feigel'man, M. V.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Detailed theory of phase diagram of clean 2D surface superconductor in a parallel magnetic field is presented. Regular spin-orbital interaction of the Rashba type is known to produce inhomogeneous superconductive state similar to the Larkin-Ovchinnikov-Fulde-Ferrel (LOFF) state with $Δ({\bf r})\propto \cos({\bf Qr})$ at high magnetic fields, with $Q \sim gμ_B h/v_F$. We consider the case of relatively strong Rashba interaction and show that at low temperatures $T\leq 0.4 T_{c0}$ the LOFF-type state is separated from the usual homogeneous state by the first-order phase transition line. At higher temperatures new "helical" state with $Δ({\bf r}) \propto \exp(i{\bf Qr})$ intervene between uniform BCS state and LOFF-like state. One component of superfluid density tensor $n_s$ vanishes on the second-order transition line between BCS state and helical state. Nonmagnetic impurities suppresses both inhomogeneous states, and eliminate them completely at $T_{c0}τ\leq 0.11$.
description: 5 pages, 1 figure; v2: as published, minor corrections
Updated pulsation models for anomalous Cepheids
Creators: name: Marconi, M.
name: Fiorentino, G.
name: Caputo, F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A theoretical investigation of the pulsation behavior of so-named ``anomalous'' Cepheids is presented. The study is based on nonlinear convective pulsation models with $Z$=0.0001 and 0.0004, mass in the range 1.3-2.2 Mo and various luminosity levels. Based on these computations, we derive period, bolometric light curves and the edges of the instability strip, showing that a variation of the metal abundance from Z=0.0001 to 0.0004 has quite small effects on these quantities. Then, using bolometric corrections and color-temperature transformations, we are able to provide the predicted relations connecting pulsational properties (periods, amplitudes) with magnitudes and colors in the various photometric bands. The theoretical pulsational scenario is compared to observed anomalous Cepheids in dwarf spheroidal galaxies and, in particular, the predicted mass-dependent Period-Magnitude-Amplitude and Period-Magnitude-Color relations are used to estimate individual mass values, as well as to discriminate between fundamental (F) and first-overtone (FO) pulsators.
description: 14 pages, 17 postscript figures, accepted for publication on A&A
title: Научно-исследовательская работа
Creators: name: ELS IPR BOOKS
Publisher: name: Санкт-Петербургский государственный университет промышленных технологий и дизайна
Year: 2017

description: Учебное пособие помогает студенту раскрыть сущность научно-исследовательской работы. Рассмотрены основные подходы к планированию и управлению научно-исследовательской работы. Изложены основы организации НИР, проблематика и особенности их проведения. Основное внимание уделено характеристике содержания процесса НИР. Предназначено для проведения практических занятий и самостоятельной работы магистрантов, обучающихся по направлению подготовки 54.04.02 «Декоративно-прикладного искусство», а также может быть рекомендовано к использованию студентами других гуманитарных направлений.
Corn Improvement Programme - Ministry of Agriculture and Lands, Jamaica
Creators: name: Martin, E. R. H.
name: Martin, E. R. H.
Publisher: name: Unknown
Year: 1966
Subjects: Crop Production/Industries
Land Economics/Use
Production Economics

description: Corn seed improvement in Jamaica by modern methods was initiated in the early 1940's by L. N. H. Larter who isolated a yellow segment from the widely grown Jamaica Red Corn. This yellow strain is the JSY, still the prevailing variety in the island. After the war, work was vLr tua Lly suspended until 1957 when the writer studied improvement methods with I.C.A. assistance in the U.S.A. and later in Mexico with the Rockefeller foundation Mission. In 1963, government appo:inted a part-time Consultant, Mr. F. Poey, who is associated with a Company producing tropical corn hybrids. This Division has also drawn freely on assistance willingly given by the Pioneer Hi-Bred Corn Company, now operating a station in Jamaica. 1. Variety Testing - Following the usual pattern in which promising commercial and experimental material is tested against local standards. 2. Controlled Mass Selection - Recommended by the Rockefeller Foundation for application to specially prepared Composite Material with a high level of initial performance and considerable additive genetic var La nce for further improvement in yield and adaptation. 3. Inbreeding of available material - Inbreds from a wide variety of material to be used in a Hybrid programme, for Top Crosses and for preparing Synthetics. Early testing of TopCross performance. 4. Making of Twin-Eared Composite - To be used as a commercial variety if of sufficiently high performance after selection, or for crossing with other material. 5. Exploratory work with Sweet Corn - (a) Using crosses between selected tropical strains of field corn and the DR-50 Sweet Corn. (b) Selection wii:hin a Sweet Corn Composite supplied to us by Pioneer Hi-Bred Corn Company. 6. Spacing and Plant-Population Trials - Following on earlier 􀀀w􀀀~􀀀r􀀀k by R. F. Innes and also recent trends abroad in which higher populations are giving promising results.
LEAF AREA AND NET ASSIMILATION RATE AS DETERMINANTS OF CROP YIELD
Creators: name: Spence, J. A.
name: Haynes, P. H.
name: Spence, J. A.
name: Haynes, P. H.
Publisher: name: Unknown
Year: 1966
Subjects: Crop Production/Industries
Production Economics

description: The relation of agronomic practice to crop yield is discussed in terms of photosynthetic efficiency of the crops (as measured by Leaf Area and Net Assimilation rates). The importance of a study of these factors in certain tropical crops is indicated.
THERAPY-SEEKING ATTITUDES AND RACIAL PREFERENCES FOR THERAPISTS: DIFFERENCES BETWEEN AFRICAN AMERICANS AND CAUCASIAN AMERICANS
Creators: name: Howell, Trinity
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 52
subject: Psychology
subject: FOS: Psychology

description: While the effects of negative attitudes on therapy and therapy-seeking and client/therapist racial matching have been widely researched, the findings are mixed and have yet to conclude if there are differences between African American and Caucasian American attitudes. The current study seeks to better understand how African American and Caucasian American participants differ in their attitudes toward therapy, therapy-seeking, and desires for a racially similar therapist. Procedure: Participants were recruited online via MTurk and participated in 2 Implicit Association Tests and 1 Questionnaire. Results: While there was no difference between the groups in terms of implicit or explicit attitudes toward therapy or therapy-seeking, on average, African Americans had neutral implicit attitudes toward race of therapist, but were more likely to explicitly prefer a similarly raced therapist than Caucasian Americans. The more negative an attitude toward therapy, the more a participant of either race preferred a similarly raced therapist.
Einstein spaces in warped geometries in five dimensions
Creators: name: Arik, M.
name: Baykal, A.
name: Çalik, M. C.
name: Çiftci, D.
name: Delice, Ö.
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate five dimensional Einstein spaces in warped geometries from the point of view of the four dimensional physically relevant Robertson-Walker-Friedman cosmological metric and the Schwarzschild metric. We show that a four-dimensional cosmology with a closed spacelike section and a cosmological constant can be imbedded into five-dimensional flat space-time.
description: 4 pages, Revtex, typos corrected
The dissipation of the system and the atom in two-photon Jaynes-Cummings model with degenerate atomic levels
Creators: name: Guo, Y. Q.
name: Zhou, L.
name: Song, H. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The method of perturbative expansion of master equation is employed to study the dissipative properties of system and of atom in the two-photon Jaynes-Cummings model (JCM) with degenerate atomic levels. The numerical results show that the degeneracy of atomic levels prolongs the period of entanglement between the atom and the field. The asymptotic value of atomic linear entropy is apparently increased by the degeneration. The amplitude of local entanglement and disentanglement is suppressed. The better the initial coherence property of the degenerate atom, the larger the coherence loss.
description: 11 pages, 4 figures
Measuring Shapes of Galaxy Images II: Morphology of 2MASS Galaxies
Creators: name: Rahman, Nurur
name: Shandarin, Sergei F.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study a sample of 112 galaxies of various Hubble types imaged in the Two Micron All Sky Survey (2MASS) in the Near-Infra Red (NIR; 1-2 $μ$m) $J$, $H$, and $K_s$ bands. The sample contains (optically classified) 32 elliptical, 16 lenticulars, and 64 spirals acquired from the 2MASS Extended Source Catalogue. We use a set of non-parametric shape measures constructed from the Minkowski Functionals (MFs) for galaxy shape analysis. We use ellipticity ($ε$) and orientation angle ($Φ$) as shape diagnostics. With these parameters as functions of area within the isophotal contour, we note that the NIR elliptical galaxies with $ε> 0.2$ show a trend of being centrally spherical and increasingly flattened towards the edge, a trend similar to images in optical wavelengths. The highly flattened elliptical galaxies show strong change in ellipticity between the center and the edge. The lenticular galaxies show morphological properties resembling either ellipticals or disk galaxies. Our analysis shows that almost half of the spiral galaxies appear to have bar like features while the rest are likely to be non-barred. Our results also indicate that almost one-third of spiral galaxies have optically hidden bars. The isophotal twist noted in the orientations of elliptical galaxies decreases with the flattening of these galaxies indicating that twist and flattening are also anti-correlated in the NIR, as found in optical wavelengths. The orientations of NIR lenticular and spiral galaxies show a wide range of twists.
description: Accepted for publication in MNRAS. Revised version contains 17 pages, 23 PostScript figures
Giant Helium Dimers Produced by Photoassociation of Ultracold Metastable Atoms
Creators: name: Leonard, J.
name: Walhout, M.
name: Mosk, A. P.
name: Mueller, T.
name: Leduc, M.
name: Cohen-Tannoudji, C.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We produce giant helium dimers by photoassociation of metastable helium atoms in a magnetically trapped, ultracold cloud. The photoassociation laser is detuned red of the atomic $2^3S_1 - 2^3P_0 $ line and produces strong heating of the sample when resonant with molecular bound states. The temperature of the cloud serves as an indicator of the molecular spectrum. We report good agreement between our spectroscopic measurements and our calculations of the five bound states belonging to a $0_u^+$ purely long-range potential well. These previously unobserved states have classical inner turning points of about 150 $a_0$ and outer turning points as large as 1150 $a_0$.
description: 4 pages, 4 figures
Three essays on voice in non-traditional employment relationships
Creators: name: Oyetunde, Kabiru Ayinde
Publisher: name: London South Bank University
Year: 2022

description: This thesis presents three essays on voice in non-traditional employment relationships with specific focus on triangular workers. The first essay provides a systematic literature review of previous empirical research exploring the voice of workers in nontraditional employment relationships. Findings from the systematic review revealed a research lacunae in the understanding of voice of workers in triangular employment
relationships. These workers, in physically mediated (temporary agencies workers) and digitally mediated (platform workers) employment arrangements, are in a precarious working state and vulnerable. Hence, the second and third paper seeks to examine the voice experiences of these category of non-traditional workers, analyse the voice mechanisms available to these workers, the issues of concern to them, the motivators/inhibitors of their voice, and the outcomes of their voice. Specifically, the second essay presents a conceptual model to depict the determinants of triangular
workers’ voice, and the third essay empirically investigates triangular workers’ voice, examining the voice experience of temporary agencies workers in the banking and health sectors, and e-hailing platform drivers in Nigeria. Findings from the empirical studies indicate that in the face of deliberate managerial silencing of triangular workers, they are in constant struggle to voice. The findings further demonstrates that beyond management-initiated voice mechanisms, workers also struggle to initiate voice means. Results from the study show convergence and divergence in the forces shaping voice among variants of triangular workers studied. While few similar forces influenced the voice of both triangular workers categories, a large differential was found in how individual and organisational structural forces influence temporary agency and online co-employment platform workers’ voice. Further findings from the empirical study expands previous research by identifying voice skill, self-identity conflict, agency-ownership governance, agency-client relationship, transition opportunity and perceived relative equity as new influencers of triangular workers’ voice. These findings add to the non-traditional workers voice theory development by identifying peculiar forces shaping less typical workers’ voice.
The Influence of Glutamate Signaling on Neuroprotective Glial Aromatase Following Traumatic Brain Injury
Creators: name: Mehos, Carissa Joyce
Publisher: name: American University
Year: 2023

description: The following studies were conducted with the aim of elucidating unanswered questions concerning the expression of glial aromatase, E2, and neuroprotection. Specifically, in Chapter 2 I begin with the quantification of changes in expression of neural aromatase and neural E2 following brain injury in zebra finches. In Chapter 3, I present experiments aimed at the investigation of the necessity of glial glutamate transporters GLAST and GLT-1 in the induction of glial aromatase in the zebra finch following mechanical brain injury. Finally, in Chapter 4 I present a set of experiments that examined the downstream effects of injury-induced aromatase on the mRNA and protein expression of the primary glial glutamate transmitter in the cortex, GLT-1.
Adiabatic dynamics of periodic waves in Bose-Einstein condensate with time dependent atomic scattering length
Creators: name: Abdullaev, F. Kh.
name: Kamchatnov, A. M.
name: Konotop, V. V.
name: Brazhnyi, V. A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Evolution of periodic matter waves in one-dimensional Bose-Einstein condensates with time dependent scattering length is described. It is shown that variation of the effective nonlinearity is a powerful tool for controlled generation of bright and dark solitons starting with periodic waves.
description: 4 pages, 1 figure
Potential pathway for recycling of the paper mill sludge compost for brick making
Creators: name: Goel, Gaurav
Publisher: name: London South Bank University
Year: 2021
Subjects: Paper mill sludge compost; Fired bricks; Recycling; Sustainability; Waste-to-brick; Laterite soil; Alluvial soil

description: This study's focus was to develop a potential pathway for recycling of the paper mill sludge compost (PMSC) in brick making. Composting reduces the paper mill sludge (PMS) moisture content considerably and shredding becomes easier. The addition of PMSC leads to an increase of porosities in bricks and makes them lighter, besides delivering energy to the firing process from burning organics. Lighter construction materials help minimize construction outlay by reducing labour and transportation costs and lesser expense on foundation construction. The variability in the experimental data and the brick properties were investigated for two types of soils, typical in the brick industry of India (alluvial and laterite soil), blended with PMSC in five mix ratios (0%, 5%, 10%, 15% and 20%). The samples of oven-dried bricks were fired at two different temperatures (850 and 900 °C) in an electrically operated muffle furnace representing typical conditions of a brick kiln. Various properties of bricks were analyzed which included linear shrinkage, bulk density, water absorption and compressive strength. Conclusions were drawn based on these properties. It was found that the addition of PMSC to the alluvial and laterite soil by up to 10% weight yield mechanical properties of fired bricks compliant with the relevant Indian and ASTM codes. Toxicity characteristic leaching procedure (TCLP) tests showed that PMSC incorporated fired bricks are safe to use in regular applications as non-load-bearing and infill walls. This study is timely in light of the European Green Deal putting focus on circular economy. Besides, it fulfills the objective of UN sustainable development goals (SDG).
description: Lab experiments were performed by making bricks. The raw materials and the product were subjected to minerological and mechanical testing.
For additional information, please see the corresponding article: https://doi.org/10.1016/j.conbuildmat.2021.122384
The Influence of Glutamate Signaling on Neuroprotective Glial Aromatase Following Traumatic Brain Injury
Creators: name: Mehos, Carissa Joyce
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 3209
subject: Neurosciences
subject: FOS: Clinical medicine

description: The following studies were conducted with the aim of elucidating unanswered questions concerning the expression of glial aromatase, E2, and neuroprotection. Specifically, in Chapter 2 I begin with the quantification of changes in expression of neural aromatase and neural E2 following brain injury in zebra finches. In Chapter 3, I present experiments aimed at the investigation of the necessity of glial glutamate transporters GLAST and GLT-1 in the induction of glial aromatase in the zebra finch following mechanical brain injury. Finally, in Chapter 4 I present a set of experiments that examined the downstream effects of injury-induced aromatase on the mRNA and protein expression of the primary glial glutamate transmitter in the cortex, GLT-1.
title: Организация и планирование автоматизированных производств
Creators: name: ELS IPR BOOKS
Publisher: name: Санкт-Петербургский государственный университет промышленных технологий и дизайна
Year: 2019

description: В учебном пособии разъясняются базовые понятия, используемые в планировании и организации производства. Рассматриваются типы производств, задачи и методы планирования, структуры организационно-технологических комплексов, характерные организационные задачи и подходы к их решению. Отдельный раздел посвящен современным информационным системам производственного назначения. Предназначено для обучающихся по программе бакалавриата по направлению 15.03.04 – Автоматизация технологических процессов и производств и может быть использовано при изучении дисциплин «Организация и планирование автоматизированных производств», «Производственный менеджмент».