bluuebunny/crossref_metadata_2025 huggingface dataset:
Growth of epitaxial CeO2buffer layers by polymer assisted deposition
Authors: Calleja A. , Mos R. B. , Roura P. , Farjas J. , Arbiol J. , Ciontea L. , Obradors X. , Puig T.
Published: July 2012

Polymer assisted deposition (PAD) has been reported as a novel CSD approach for thin film growth with improved homogeneity and long stability by forming a metal polymer species. It also offers the interesting possibility of having a library of PAD solutions for each precursor metal and obtaining the required composition by simple mixing. Another potential advantage is the increase in thickness since mechanical stresses are expected to be alleviated during shrinkage in the metalorganic decomposition by the metal-polymer network.

Cerium oxide films on YSZ single crystals were grown from water-based solutions containing cerium nitrate, polyethyleneimine and complexing EDTA, in order to explore the benefits of using the PAD approach for growing buffer layers in coated conductors. An ultrafiltration step was performed to remove the non-coordinated species in solution. The degree of purification and efficiency in the cerium recovery was investigated by different techniques. TGA-DTA analysis was used to provide guidance to the best thermal profiles in different atmospheres and specially to diminish the adverse effects of exothermic events during decomposition. Microstructural evolution was tracked by AFM and TEM, while epitaxial fraction was followed by X-ray diffraction. The results show the high importance of choosing the proper atmosphere and the need for tuning of heating ramps to obtain dense, flat and epitaxial ceria films by PAD.
Progress in Research and Mass Production of Large-Scale Tandem Thin Film Si Solar Modules at Chint Solar
Authors: Niu X. , Yu C. , Wang M. , Li G. , Zhu X. , Cheng B. , Chen Z. , Wang G. , Zhou C. , Liu S. , Deng H. , Xiao J. , Fung K. , Yang L.
Published: July 2012

Over the past decade, the PV industry has witnessed tremendous growth in manufacturing scale and technology advancement, with PV generated electricity cost ever approaching grid parity. Among them, Si based thin film technology has made substantial progress in demonstrating its inherent advantages in lower material cost, ease of manufacturing and higher energy yield, etc. More recently, reduced product prices and competing technologies from crystalline silicon and other thin film technologies have made amorphous and microcrystalline silicon based thin film technology very challenging, and requires further increase in module efficiency and decrease in manufacturing cost. As one of the few companies in the world with significant manufacturing capacity for tandem thin film Si PV products, Chint Solar (Astronergy) has been at the forefront of technology development for the mass production of large-scale (Gen. 5, 1.43m2) Si thin film solar modules in the last 5 years. We will review major technology advancements which have been mass production proven and led to the mass produced tandem silicon thin film module with 10.0% plus stabilized efficiency, along with the field performance of those modules.
Large Grained, Low Defect Density Polycrystalline Silicon on Glass Substrates by Large-area Diode Laser Crystallisation
Authors: Eggleston Bonne , Varlamov Sergey , Huang Jialiang , Evans Rhett , Dore Jonathon , Green Martin A.
Published: July 2012

A new method to form high quality crystalline silicon thin films on cheap glass substrates is developed using a single pass of a line-focus cw diode laser in air. The laser process results in the formation of large high-quality crystals as they grow laterally in the scan direction – seeded by the previously crystallised region. Grains 10 μm in thickness, up to millimetres in length and hundreds of microns in width have been grown with virtually zero detectable intragrain defects. Another mode is found which results in much smaller crystals grown by partial melting. The dominant grain boundaries identified are Σ3 <111> 60° twins. Hall mobilities as high as 470 cm2/Vs have been recorded. A diffused emitter is used to create a p-n junction at the rear of the films which produces open-circuit voltages as high as 539 mV.
Guided Flapless Surgery With Immediate Loading for the High Narrow Ridge Without Grafting
Authors: Schnitman Paul A. , Lee Sang J. , Campard Guillaume J. , Dona Maria
Published: July 2012

Computer guided implant treatment allows implants and associated restorations to be precisely placed during the same procedure directly through the gingiva with reduced postoperative complications and surgical time. When bone height is adequate but very narrow, the virtual guided sleeve is often placed too deeply into the ridge crest interfering with the seating of the surgical template. This case report of a patient exhibiting very narrow residual ridges due to severe resorption describes a new computer guided procedure using a single surgical template maintaining bone height and immediate restoration without a mucoperiosteal flap. The success of this technique is the result of innovative modifications in the software as well as instrumentation. Modifications include planning a different implant length virtually to raise the position of guide sleeves, alteration of drilling sequences, modifications of the start drill, incorporation of osteotomes, and use of an alternative implant seating mount. The combination of these methods allows for deeper site preparation and implant seating beyond the default settings, without any crestal bone reduction. These modifications not only make the guided concept possible for the entire preparation and seating procedures, but also allow for the slight removal of bone that would interfere with the implant seating through the surgical template without a mucoperiosteal flap. This new approach to computer guided surgery maintains prosthetic precision in the fabrication of a provisional restoration prior to implantation with minimal delivery adjustments using prefabricated conical abutments when placing implants at differing levels into the high narrow ridge.
Video laparoscopic intervention for an interstitial pregnancy after failure of clinical treatment
Authors: Szylit Nilson Abrão , Podgaec Sérgio , Traina Evelyn , Oliveira Rita de Cassia Sanches
Published: July 2012

CONTEXT: Interstitial pregnancy is a rare form of ectopic pregnancy for which the best therapeutic course of action has yet to be determined. Surgical intervention entails a high risk of hemorrhage due to the great vascularization of the cornual region of the uterus. Case descriptions facilitate the analysis of results and aid clinicians in determining the most appropriate course of action in these situations. CASE REPORT: In a patient with an ultrasound diagnosis of interstitial pregnancy, clinical treatment using methotrexate was chosen. However, after one week, there was a marked decline in the serum level of the β subunit of chorionic gonadotropin hormone, although an ultrasound examination revealed embryonic cardiac activity. A second dose of the chemotherapy was administered. Embryonic cardiac activity persisted 48 hours later. Video laparoscopy was performed to achieve right-side cornual resection, which resulted in satisfactory resolution of the case.
Abordagem sobre as técnicas de geoprocessamento aplicadas ao planejamento e gestão urbana
Authors: Farina Flávia C.
Published: July 2012

Nas últimas décadas, as discussões em torno do tema urbanização têm enfatizado a preocupação com o meio ambiente, a renovação dos instrumentos tradicionais de planejamento urbano e a necessidade de utilização de novas técnicas para monitorar e avaliar a expansão urbana. Este estudo visa contribuir para o planejamento e gestão da ocupação urbana, demonstrando as possibilidades técnicas de melhor organizar a expansão territorial das cidades, observados critérios ambientais. Neste sentido, são feitas considerações sobre a evolução dos métodos de planejamento e a inserção da variável ambiental na gestão urbana. São expostas algumas contribuições das técnicas de geoprocessamento como ferramenta para auxiliar no problema da expansão urbana. A utilização das técnicas de geoprocessamento propicia eficiência na obtenção, armazenamento, atualização, recuperação e cruzamento dos dados necessários à gestão urbana. Os resultados demonstram que a utilização dessas técnicas é eficaz para o levantamento dos recursos naturais e das atividades humanas, desenvolvimento de banco de dados ambientais georreferenciado, monitoramento das transformações ambientais e planejamento do uso e ocupação territorial.
Controle do homem no trabalho ou qualidade de vida no trabalho?
Authors: Dourado Débora Coutinho Paschoal , Carvalho Cristina Amélia
Published: July 2012

Este artigo surge do ânimo de canalizar para a investigação a reação indignada aos incessantes esforços instrumentalizadores do homem no trabalho e da preocupação com as conseqüências desse processo para uma sociedade como a nossa. Tem como propósito realizar uma reinterpretação crítica do movimento pela Qualidade de Vida no Trabalho (QVT), desvendando suas ferramentas de instrumentalização do homem pelo capital e revelar sua verdadeira natureza. 0 artigo inicia com uma interpretação da evolução histórica da ciência e da prática da administração, analisando seus propósitos, desvendando a lógica funcional do sistema e culminando com a revelação de alguns de seus mecanismos opressores. Discute as formas de controle presentes sob as dimensões agregadas dos modelos de QVT, utilizando a classificação das obras de três autores (GORZ, 2003; MOTTA; 2000; PAGES et al, 1993) com o intuito de desvendar o exercício do controle. Aponta, assim, que as recompensas diretas e indiretas, as condições do ambiente de trabalho seguras e atrativas, a concepção do trabalho, a autonomia e participação do indivíduo, a imagem social da empresa e o equilíbrio entre trabalho, família e lazer promovem, na realidade, a instrumentalização do indivíduo no trabalho através de métodos cada vez mais sofisticados de controle social.
Inovação gerencial em municípios: análise exploratória das práticas de gestão do plano estratégico de Juiz de Fora
Authors: Oliveira Virgílio Cézar da Silva e , Oliveira Luis Carlos Ferreira de Sousa , Siqueira Euler David de , Brito Mozar José de
Published: July 2012

Este artigo procura discutir as práticas de gestão associadas ao plano estratégico do município mineiro de Juiz de Fora (PlanoJF). Para tanto, recupera algumas características da intervenção estatal entre as décadas de 1930 e 1980 no Brasil. Detalha, ainda, alguns fatos que, a partir dos anos 1990, alteraram a natureza desse processo. A reflexão sobre referências teóricas e as evidências coletadas por meio de entrevistas pessoais, da observação não-participante e da análise documental possibilitam, ao final do artigo, a descrição do plano, a análise dos mecanismos de gestão conduzidos por seu comitê executivo e a exposição de algumas constatações.
O quadro-negro como tela: o uso do filme Nenhum a menos como recurso de aprendizagem em gestão por competências
Authors: Fleury Maria Tereza Leme , Sarsur Amyra Moyzes
Published: July 2012

Refletir sobre um conceito em construção - o conceito de competência - e o uso de estratégias interativas para aprendizagem são os objetivos deste artigo. Tendo como pressuposto que elementos teóricos, em Ciências Sociais Aplicadas, como é o caso da Administração, são mais bem absorvidos e internalizados através de métodos de ensino-aprendizagem interativos, os autores determinam a interface entre a abordagem cinematográfica por meio do filme "Nenhum a Menos" e o marco referencial que norteia a noção de competência. Nota-se que são diversas as possibilidades de compreensão do conceito e, ainda mais, de discussão dos mesmos, tendo em vista a necessidade de sua contextualização. Conclui-se pela possibilidade de utilização da metáfora cinematográfica como estratégia complementar de ensino-aprendizagem por despertar maior interesse e proximidade com o "aprendiz", permitindo a ele estabelecer paralelos mais concretos entre a ficção e a realidade.
Emocionalidade limitada - uma dimensão da aprendizagem coletiva para desenvolver relações cooperativas e solidárias em arranjos produtivos locais: os casos de Ubá (MG) e Nova Friburgo (RJ)
Authors: Villardi Beatriz Quiroz , Castro Junior Joel de Lima Pereira
Published: July 2012

Este artigo examina a natureza emocional subjacente às relações interpessoais requeridas para o desenvolvimento de arranjos sociais no contexto de estruturas conhecidas como arranjos produtivos locais (APLs). Essas estruturas são definidas como conjuntos multinueleadas formadas por atores, individuais e institucionais, capazes de propiciar trocas horizontais que permitam interações de cooperação. Tais interações associativas são adaptativas e incrementais, favorecem a aprendizagem entre os atores envolvidos e resultam em aumento de inovação e de capacidade coletiva de sobrevivência dos APLs em ambientes competitivos hostis. Os dados de campo subsidiaram a identificação de uma racionalidade funcional (instrumental) predominante. Essa racionalidade é orientadora das ações coletivas competitivas, em detrimento das ações de cooperação e solidariedade requeridas pelo desenvolvimento contínuo e sustentável do APL. A análise dos dados também indicaram que: a) a emocionalidade limitada tem sido desconsiderada pelos atores envolvidos (empresários e representantes do Sebrae) como uma dimensão subjacente às relações interpessoais e à aprendizagem coletiva requerida dos APLs; b) a busca pela atendimento dos interesses individuais prevalece e conduz a uma desconfiança mútua que impede o desenvolvimento pleno e a continuidade dos APLs estudados.
Análise crítica em organizações sociais: apropriando teoria e prática de seus componentes estruturais e culturais
Authors: Santos Leane Mota Araujo dos , Lopes Fernando Dias , Añez Miguel Eduardo Moreno
Published: July 2012

As organizações sociais encontram-se em expansão e em reconhecimento por parte do governo e da sociedade, mas ainda carecem de estudos acadêmicos a partir das práticas da sua dinâmica organizacional. O propósito deste artigo é analisar as particularidades da gestão das ONGs no que concerne aos aspectos culturais e estruturais, identificando se os elementos encontrados se apresentam de forma congruente com o que se espera de uma ONG. Dessa forma, busca contribuir para a análise crítica à transposição inapropriada de conceitos da teoria organizacional tradicional para a gestão das ONGs e, também, para o delineamento de um arcabouço teórico específico para a compreensão dessas organizações, considerando a realidade nacional. A pesquisa foi conduzida em 10 ONGs, com abordagem predominantemente qualitativa. Os dados foram coletados através de entrevistas com os fundadores e/ou principais dirigentes das ONGs. Os resultados confirmam as particularidades identificadas em estudos anteriores e avança à medida que faz uma análise crítica e revela congruências com relação à cultura e incongruências referentes à estrutura social, principalmente, quando da utilização acrítica de instrumentos das organizações tradicionais.
Superando a pobreza: o papel do capital social na região metropolitana de Belo Horizonte
Authors: Helal Diogo Henrique , Neves Jorge Alexandre Barbosa
Published: July 2012

Este artigo aborda o papel do capital social na superação da pobreza em áreas urbanas. Diferente de outros estudos que adotam uma perspectiva macro para capital social, este o analisa como algo inerente à esfera das interações entre indivíduos, sendo capaz também de trazer retornos individuais. Capital social é mensurado com base na associação dos indivíduos em diversos tipos de organizações sociais. A hipótese, de que, mesmo controlando-se por variáveis de capital humano e origem socioeconômica, quanto maior o estoque de capital social de um indivíduo maior será sua chance de obter uma renda que lhe permita superar a linha de pobreza, foi testada por meio de um modelo de regressão logística, que estimou o efeito de variáveis (teste e de controle) na probabilidade de um indivíduo superar a linha da pobreza. Os dados para este estudo são secundários, oriundos da edição de 2002 da Pesquisa da Região Metropolitana de Belo Horizonte (PRMBH/UFMG). Os resultados mostram que ser membro de organizações sociais (redes de relacionamento) tem um efeito significativo nas chances de se escapar da pobreza em uma grande região metropolitana do Brasil (Belo Horizonte). A conclusão destaca, neste sentido, a importância dos retornos individuais das redes sociais.
Extra! Extra! O caso do Metrorec revela como é operada a manipulação ideológica do discurso da QVT
Authors: Dourado Débora Coutinho Paschoal , Carvalho Cristina Amélia
Published: July 2012

O objetivo deste artigo é revelar os interesses organizacionais subjacentes à lógica organizacional da qualidade de vida no trabalho (QVT). Para tanto, aplica a técnica de análise crítica do discurso (ACD) ao programa de QVT do Metrorec, empresa responsável pelo metrô no estado de Pernambuco.Categorias discursivas servem de base para operacionalizar tal análise, possibilitando identificar com o o discurso da QVT em prega recursos retóricos ideologicam ente operados. A técnica possibilita desvendar com o esse discurso oculta de maneira eficaz a dom inação presente na relação em presa/trabalhador. Permite também com preender de que maneira tal discurso visa conseguir desse trabalhador participação e comprometimento com a solução dos problemas em seu desempenho causados pelos efeitos negativos do trabalho na empresa.
Adaptability and stability of maize varieties using mixed model methodology
Authors: Mendes Flávia Ferreira , Guimarães Lauro José Moreira , Souza João Cândido , Guimarães Paulo Evaristo Oliveira , Pacheco Cleso Antônio Patto , Machado Jane Rodrigues de Assis , Meirelles Walter Fernandes , Silva Adelmo Resende da , Parentoni Sidney Netto
Published: July 2012

The objective of this study was to evaluate the performance, adaptability and stability of corn cultivars simultaneously in unbalanced experiments, using the method of harmonic means of the relative performance of genetic values. The grain yield of 45 cultivars, including hybrids and varieties, was evaluated in 49 environments in two growing seasons. In the 2007/2008 growing season, 36 cultivars were evaluated and in 2008/2009 25 cultivars, of which 16 were used in both seasons. Statistical analyses were performed based on mixed models, considering genotypes as random and replications within environments as fixed factors. The experimental precision in the combined analyses was high (accuracy estimates > 92 %). Despite the existence of genotype x environment interaction, hybrids and varieties with high adaptability and stability were identified. Results showed that the method of harmonic means of the relative performance of genetic values is a suitable method for maize breeding programs.
A dinâmica Família-Empresa: uma aplicação do método historiográfico e da técnica do genograma
Authors: Lescura Carolina , Brito Mozar José de , Cappelle Mônica Carvalho Alves , Borges Alex Fernando
Published: July 2012

As empresas familiares possuem características específicas, produto da interação entre família e empresa. Para melhor compreender essas duas esferas, será necessário, ao pesquisador, utilizar diferentes recursos metodológicos que viabilizem tal interação. Assim, buscou-se investigar a dinâmica entre família e empresa sob a perspectiva do método historiográfico e da técnica do genograma. Pelos resultados deste trabalho, considera-se que a aplicação conjugada desses recursos metodológicos amplia as possibilidades de compreensão da interação família e empresa. Acredita-se que a principal contribuição deste trabalho seja de natureza metodológica, pois ele denota um desenvolvimento de pesquisa qualitativa que poderá ser trilhado por outros pesquisadores interessados em investigar organizações dessa natureza. Espera-se que o resultado aqui produzido possa contribuir para o avanço do conhecimento sobre as empresas familiares, especialmente no que diz respeito às sinergias e conflitos gerados com base nas relações entre membros da família e da organização.
Ontogeny, functional morphology, and comparative morphology of lower (Stage 4) and basal middle (Stage 5) Cambrian gogiids, Guizhou Province, China
Authors: Parsley Ronald L.
Published: July 2012

Three gogiid eocrinoids, numbering in the thousands of specimens, are well known from the lower Cambrian (Stage 4) Balang Formation (Guizhoueocrinus yui) and basal middle Cambrian (Stage 5) Kaili Formation (Kaili Biota) (Sinoeocrinus lui and Globoeocrinus globulus) that resided on the Yangtze-South China Plate (modern Guizhou Province, China). In each species a complete ontogenetic sequence, using thecal height (TH) as a scale, juvenile stage (early, middle, and late substages), mature stage (early, middle, and late substages), and a gerontic stage can be identified. Sutural pores appeared in an orderly sequence; below the ambulacrals, above the stalk and generally over the theca, in that order. In younger species their emplacement and growth was commonly precocious relative to G. yui. Also, their shape ranges from circular to oval to triangular in a single growth sequence, after the establishment of the 2-1-2 pattern; brachioles were added in series of five and were also precocious in time of occurrence in younger species. Thecae in younger species tend to retain juvenile aspects relative to G. yui. All of these species lived in outer shelf settings in fine-grained, organic-rich siliciclastics.
Vertebrate trackways among a stand ofSupaiaWhite plants on an early Permian floodplain, New Mexico
Authors: DiMichele William A. , Lucas Spencer G. , Krainer Karl
Published: July 2012

Little is known about the habit and spatial distribution of Early Permian tropical vegetation, a sharp contrast with the Pennsylvanian from which many in-situ “T0” assemblages are known. Even less is known about the potential interaction of plants and vertebrates. Here we report the discovery of a small stand of 34 probableSupaiaWhite plants from the Abo Formation of New Mexico. The plants were growing on a mudflat, subject to periodic flooding and exposure. The same mudflat hosts trackways of vertebrates that appear to have walked around or between theSupaiaplants. The stems are preserved as molds, and vary from 20 mm to 70 mm in diameter, averaging 42.4 mm, indicating heights of approximately 2.5–4 m. The plants, which may be described as small trees given their estimated height, are as close as 110 mm to their nearest neighbor and average nearly 300 mm apart. A series of lines or filled fissures, which we interpret as roots, radiates from the base of each stem. Leaves ofSupaia thinfeldioidesWhite are the only foliage found in association with these stems, on bedding planes above and at the base of the lowest expression of the stem molds. Associated vertebrate trackways either congregate around some of the stems or wend their way between the stems and include those of a single large temnospondyl amphibian (LimnopusMarsh) and many of small predatory parareptiles (DromopusMarsh). This study demonstrates thatS. thinfeldiodeswere small-statured, weedy, opportunistic plants. It also shows that contemporaneous vertebrates prowled such environments, presumably either for food, shelter, or both given detectable pace and path.
Training Quantity–Number Competencies in Students With Intellectual Disabilities
Authors: Kuhl Jan , Sinner Daniel , Ennemoser Marco
Published: July 2012

Literature reviews offer evidence for using systematic instruction to teach students with intellectual disabilities in mathematics. A new approach in teaching mathematical skills is to provide quantity–number competencies (QNC). However, this approach has not yet been examined in people with intellectual disabilities.

The objective of this study was to evaluate the effects of a QNC training based on the developmental model by Krajewski (2008) in students with intellectual disabilities.

Based on their cognitive and mathematical abilities, 25 children with intellectual disabilities were assigned to one of two experimental conditions. The training group received a QNC training, whereas the control group received a language skills training.

The posttest findings indicate that the gains in mathematics competence in the QNC training group were substantially larger than in the control condition. However, the QNC training group could not keep up their advancement of competency until to the follow-up conducted 3 months afterwards.
Dynamic Testing: Measuring Inductive Reasoning in Children With Developmental Disabilities and Mild Cognitive Impairments
Authors: Resing Wilma C. M. , Stevenson Claire E. , Bosma Tirza
Published: July 2012

The main aim of this study was to evaluate the use of dynamic testing based on a graduated prompts techniques training in a clinical educational setting. We examined the question of whether it would be possible to administer a four session dynamic test to a specific group of children with complex behavioral and psychiatric problems, developmental disabilities, and often very weak school performance. We further examined whether children would show different change patterns in their use of solving strategies when presented with a figural analogies task, and we explored the relationship between existing intelligence measures, school achievement measures, and dynamic testing outcomes. Data revealed that the children with these complex problems were able to solve figural analogies and progressed in their accuracy in solving the task after training. We also found that trained children employed more sophisticated problem solving after graduated prompts training, and individual differences in progression paths from pretest to posttest were apparent. Furthermore, we were able to identify groups of children differing in the number and type of instructions needed during training. IQ scores and teacher ratings of school performance were highly correlated, although IQ scores were not related to objectively measured school achievement scores. Dynamic test scores revealed lower correlations with teacher ratings of school performance but were the best predictors of school achievement. It was concluded that dynamic test measures gave the best indication of the children’s scholastic achievement and their potential for learning.
Engaging the Disengaged?: A Longitudinal Analysis of the Relations Between Indigenous and Non-Indigenous Australian Students’ Academic Self-Concept and Disengagement
Authors: Bodkin-Andrews Gawaian H. , O’Rourke Virginia , Dillon Anthony , Craven Rhonda G. , Yeung Alexander Seeshing
Published: July 2012

Academic disengagement among disadvantaged minority groups has received considerable attention within the psychological literature, and such research has attempted to identify variables that may reduce the risk of disengagement. With regard to this investigation, longitudinal structural equation modeling techniques were used across a sample of secondary school students to test whether Aboriginality (being Indigenous or non-Indigenous Australian), academic self-concept, and academic disengagement were causally related (once the effects of prior measures had been accounted for). The results suggest that although Aboriginality held a significant correlation with disengagement (suggesting that Indigenous students are more likely to disengage from school), the causal impact of this variable seems to be negated when the causal impact of academic self-concept is also considered. These results suggest that enhancing academic self-concept may be a useful strategy for addressing patterns of school disengagement that have been repeatedly noted for Indigenous Australian students.
High-pressure experimental geosciences: state of the art and prospects
Authors: Sanloup Chrystele
Published: July 2012

This paper aims at reviewing the current advancements of high pressure experimental geosciences. The angle chosen is that of in situ measurements at the high pressure (P) and high temperature (T) conditions relevant of the deep Earth and planets, measurements that are often carried out at large facilities (X-ray synchrotrons and neutron sources). Rather than giving an exhaustive catalogue, four main active areas of research are chosen: the latest advancements on deep Earth mineralogy, how to probe the properties of melts, how to probe Earth dynamics, and chemical reactivity induced by increased P-T conditions. For each area, techniques are briefly presented and selected examples illustrate their potentials, and what that tell us about the structure and dynamics of the planet.
Triassic to early Liassic continental rifting chronology and process at the southwest margin of the Alpine Tethys (Middle Atlas and High Moulouya, Morocco); correlations with the Atlantic rifting, synchronous and diachronous
Authors: Ouarhache Driss , Charriere André , Chalot-prat Françoise , Wartiti Mohamed EL
Published: July 2012

Apparu à l’est du rift continental atlantique, un rift continental téthysien s’est développé sur le domaine atlasique du Maroc au cours du Trias et du début du Jurassique. Dans le transect étudié du Moyen Atlas et de la Haute Moulouya (MAHM), ce début du rifting téthysien, le « rifting initial », comporta 3 étapes majeures.

Au Trias supérieur, apparut une première génération de bassins syn-rift (sr1) continentaux et détritiques, associés au rejeu extensif de certaines sutures hercyniennes ; cette phase se poursuivit avec une transgression laguno-marine généralisée dans un stade post-rift (pr1) au Carnien supérieur-Norien.

Au voisinage de la limite Trias-Lias, se produisit une effusion de trapps basaltiques aériens à subaquatiques ; la région subit ensuite une phase d’érosion.

Au début du Lias, se différencia une deuxième génération de bassins syn-rift (sr2) continentaux ou laguno-marins, extensifs ou transtensifs, associés à un volcanisme explosif localisé sur quatre zones faillées (faille d’Adarouch, accident du Tizi n’Trettène, accident Sud Moyen atlasique, faille de Ksabi-Ahouli) ; cette phase se clôtura avec l’arrivée de la mer dans un stade post-rift (pr2) débutant au Sinémurien supérieur-Carixien inférieur.

La zone du MAHM eut une histoire différente des régions occidentales du domaine atlasique, qu’il s’agisse d’un autre segment du rift atlasique (Haut Atlas de Marrakech) ou d’une bordure du rift atlantique (Haut Atlas occidental).

Pendant le rifting ante-trapp, alors que ces bassins occidentaux ont été structurés par plusieurs séquences tectono-sédimentaires successives étagées du Permien supérieur au Trias supérieur, les bassins du MAHM n’enregistrèrent qu’une seule mégaséquence sédimentaire triasique. Ainsi, les rifts continentaux atlantique et Ouest atlasique furent initiés, simultanément (?), dès le Permien supérieur, tandis que le rift continental de l’Atlas central et oriental n’apparut vraisemblablement qu’au Trias supérieur. La déchirure du rift atlasique migra ainsi vers l’est de la fin du Primaire au début du Secondaire.

Durant la période post-trapp, alors que les bassins occidentaux étaient le siège d’un calme tectonique relatif, une fracturation majeure affecta le MAHM, générant de nouveaux bassins sédimentaires associés à un second épisode volcanique, de nature explosive cette fois. Cette poursuite du rifting, après les dernières effusions basaltiques et avant l’arrivée de la mer jurassique, préfigura les découpages tectoniques qui continuèrent de se manifester dans les parties centrale et orientale du rift atlasique jusqu’au Jurassique moyen.
Effects of Low Concentrations of Rotenone Upon Mitohormesis in SH-SY5Y Cells
Authors: Yuyun Xiong , Jinjun Qian , Minfang Xu , Jing Qiu , Juan Xia , Rui Ma , Li Zhu , Jing Gao
Published: July 2012

The mitochondrial toxin rotenone exerts cytotoxicity via overproduction of reactive oxygen species (ROS) and depolarization of the mitochondrial membrane. We investigated the effects of rotenone (12.5, 25, 50, 100 nmol/L) on mitochondrial biogenesis and the potential roles of ROS production in SH-SY5Y cells. Mitochondrial biogenesis was assessed by counting the number of mitochondria, determining protein expression of peroxisome proliferator-activated receptor γ coactivator α (PGC1-α) and its regulator, SIRT1, and oxygen consumption. ROS production and levels of reduced glutathione (GSH) and oxidized glutathione(GSSG) were also determined. Compared with controls, rotenone (12.5 nmol/L) significantly increased the quantity of mitochondria and amount of oxygen consumption, whereas rotenone at >12.5 nmol/L decreased the quantity of mitochondria and amount of oxygen consumption. GSH contents and GSH/GSSG were also significantly enhanced by rotenone at 12.5 nmol/L and decreased by rotenone at >12.5 nmol/L. Except for ROS production and SIRT1 protein expression, all concentration–response relationships showed a typical inverted-U shape. ROS production was continually increased in cells treated with rotenone. These data indicate that low concentrations of rotenone can induce mitohormesis, which may be attributed to ROS production.
Characterization of weathered petroleum hydrocarbons during a landfarming bioremediation study
Authors: Maletic Snezana , Roncevic Srdjan , Dalmacija Bozo , Agbaba Jasmina , Watson Malcolm , Tubic Aleksandra , Ugarcina-Perovic Svetlana
Published: July 2012

Landfarming bioremediation was performed over 2 years on soil heavily
polluted with weathered oil and oil derivatives: 23200 mg kg-1 of mineral
oil, 35300 mg kg-1 total hydrocarbons, and 8.65 mg kg-1 of total PAHs.
During the experiment, mineral oil, total hydrocarbon and PAH concentrations
decreased by approximately 53%, 27% and 72%, respectively. A GC/MS-Scan was
used to identify the crude oil components that persist after bioremediation
treatment of contaminated soil and the metabolites generated during this
process. The data shows that in weathered-hydrocarbons contaminated soil,
the number of initially detected compounds after the bioremediation process
further decreased over a 2 year period, and at the same time several new
compounds were observed at the end of experiment. Higher persistence was
also shown for heavier n-alkanes and branched alkanes, which could be
detected over a longer period of time. The analysis highlights the
importance of n-alkanes, their substituted derivatives and polycyclic
aromatic hydrocarbons as the most significant pollutants.
Inclination of the orbital planes of visual binaries
Authors: Popovic G.M.
Published: July 2012

The inclination of the orbital planes of 78 visual binaries with known orbits
with respect to the galactic was examined. No double star groupings were
found having approximately equal orientation of their orbital planes. Viewed
the orbital plane north poles there are more binary systems with
counterclockwise motion than those moving clockwise.
On the distribution of visual double stars
Authors: Angelov T.
Published: July 2012

An integrated distribution function is derived for visual double stars
according to the magnitude difference ?m between the components. For this
purpose the author uses a sample of 1626 double stars with ?m ? [0m ? 4m].
The increment of the descriptive distribution function for an arbitrary
increment of the variable ?m is also determined.
Distances to the Origem and the Monoceros loops
Authors: Urosevic D. , Milogradov-Turin J.
Published: July 2012

Using the Supernova Remnants (SNR) hypothesis for the radio loops, distances
of the Origem and the Monoceros loops were calculated from the surface
brightness and the angular diameters at 1420 MHz. The data were taken from
the northen sky radio continuum survey at 1420 MHz (Reich and Reich, 1986)
while the surface brightness-diameter (? ? D) relation for SNR was taken from
Berkhuijsen (1973). The distances of two loops determined here are larger
than earlier ones, have radio astronomical roots and smaller relative errors.
Stark broadening parameter tables for Sc X, Sc XI, Ti XI and Ti XII
Authors: Dimitrijevic M.S. , Sahal−Bréchot S.
Published: July 2012

By using the semiclassical-perturbation formalism, we have calculated
electron-, proton-, and He III-impact line widths and shifts for 4 Sc X, 10
Sc XI, 4 Ti XI and 27 Ti XII multiplets, significant for investigation and
modeling of different plasmas in astrophysics and physics. For Sc X
calculations have been performed within the temperature range from 200,000 K
to 5,000,000 K, and for perturber densities 1019cm?3 - 1022cm?3. Stark
broadening data for Sc XI are tabulated for temperatures from 500,000 K to
5,000,000 K, and perturber densities 1018cm?3 - 1022cm?3. For Ti XI
calculations were performed within the temperature range from 500,000 K to
5,000,000 K, and perturber densities 1018cm?3 - 1022cm?3, while for Ti XII
results are given for temperatures from 500,000 K to 6,000,000 K, and
perturber densities 1018cm?3 - 1023cm?3.
On the total absorption cross-section of galaxies - II: The case of λ cosmologies and covering factor variation
Authors: Cirkovic M.M. , Samurovic S.
Published: July 2012

In this work we expand the previous discussion of the plausibility of
hypothesis of origin of the Ly? forest absorption systems in haloes of normal
galaxies in connection with the HubbleDeepField (HDF) data. It is shown that
simplistic approach to absorption cross-sections of galaxies with no
luminosity scaling is in strong violation of empirical statistics up to
redshift of z ? 3.5. Realistic variation of the covering factor in order to
account for its increase in the inner parts of observed haloes leads to even
bigger discrepancy. Cosmologies with finite cosmological constant are briefly
discussed and compared to ? = 0 case. Ways to improve agreement with
observational data are indicated. This problem is highly illustrative of the
basic tenets of modern observational cosmology.
A comparison of metal and Ly-α absorption in galactic haloes
Authors: Cirkovic M.M.
Published: July 2012

The metallicity structure of galactic haloes is one of the major unknowns in
modern galactic astrophysics and observational cosmology. Hereby we outline a
very simple method for obtaining at least a crude picture of gas abundances,
based on recent important statistical determination of the relationship
between neutral hydrogen absorbing column density and galaxy impact
parameter. It is a fine illustration of the great theoretical and
observational power of low-redshift Ly? absorption studies. Future detailed
analyses of large samples of absorption-selected galaxies will certainly
provide us with more data on the abundance structure of extended gaseous
component of galaxies.
On the generalized Schuster density law
Authors: Ninkovic S.
Published: July 2012

A special case of the generalized Schuster density law for stellar systems
with spherical symmetry is discussed; here the exponent in the denominator is
equal to i/2 where i is a positive integer. Special attention is paid to the
situation 2 ? i ? 5 since then the mass distributions in almost all
approximately spherical stellar systems and subsystems known to exist - e. g.
dark coronae of galaxies, bulges and halos of spiral galaxies, as well as the
systems with the classical Schuster density law - are included. With certain
improvements one can also obtain more ample variants including the density
continuously attaining zero at a finite radius, somewhat different
descriptions of the mass distribution, as well as generalizations towards
axial symmetry. It is shown among others, that a spheroid with this mass
distribution (i=4) yields the same total mass as the exponential disc and
that the mass distribution proposed by King belongs asymptotically to the
generalized Schuster density law (i=3).
The zonal satellite problem - I: Near-collision flow
Authors: Mioc V. , Stavinschi M.
Published: July 2012

The force field described by a potential function of the form U = ?n k=1
ak/rk (r = distance between particles, ak = real parameters) models various
concrete situations belonging to astronomy, physics, mechanics,
astrodynamics, etc. The two-body problem is being tackled in such a field.
The motion equations and the first integrals of energy and angular momentum
are established. The McGehee-type coordinates are used to blow up the
collision singularity and to paste the resulting manifold on the phase space.
The flow on the collision manifold is depicted. Then, using the rotational
symmetry of the problem and the angular momentum integral, the local flow
near collision is described and interpreted in terms of physical motion.
Stark broadening parameter tables for K VIII and K IX
Authors: Dimitrijevic M.S. , Sahal−Bréchot S.
Published: July 2012

Using a semiclassical approach, we have calculated electron?, proton?, and He
III?impact line widths and shifts for 4 K VIII and 30 K IX multiplets as a
function of temperature and perturber density.
145CCD astrometric positions of comets and minor planets: Observed during March-September 1998 at the Belgrade observatory
Authors: Benishek Vl. , Protitch-Benishek V.
Published: July 2012

In this paper we present precise astrometric positions of four comets and
four minor planets from the MPC critical list. All the observations were
carried out with CCD equipped Askania astrograph (13.5/160). The SBIG ST-8
camera was used. Comet 1998 M5 (Stonehouse) occulted an anonymous star on
July 9 and that phenomenon was observed successfully.
Modernization of the Belgrade meridian circle
Authors: Pinigin G. , Pakvor I. , Shulga A.
Published: July 2012

The purpose of the modernization of the Belgrade Meridian Circle is laid out.
The description of the technical elements of the planned undertaking is also
presented. The modernization includes the CCD micrometer, automatic circle
reading system (CRS) and the telescope setting system (TSS).
Stark broadening data tables for some analogous spectral lines along Li and Be isoelectronic sequences
Authors: Dimitrijevic M.S.
Published: July 2012

By using the semiclassical perturbation approach, Stark broadening parameters
due to the interaction with a selection of perturbers of interest for
recently published experimental results for Li - like B III, C IV, N V and O
VI 3s2S-3p2Po, and for Be - like B II, C III, N IV and O V 3s3S-3p3Po
multiplets, have been calculated. The results are presented as a function of
temperature for a perturber density of 1017cm?3. The influence of resonance
contribution for B II, differences in Stark broadening parameters if we take
oscillator strengths calculated within the Coulomb approximation or taken
from TOP Database, and the influence of transitions with different parent
terms, have been discussed as well.
New orbital elements of 5 interferometric double stars
Authors: Olevic D. , Jovanovic P.
Published: July 2012

In this paper, for the first time, are presented elliptical and Thiel- Innes
orbitatal elements for the following interferometric pairs: WDS 00416+2438 =
WRH, WDS 03271+1845 = CHARA 10, WDS 04044+2406 = McA 13 Aa, WDS 17095+4047 =
McA 45 and WDS 23019+4219 = o And Aa. For the pairs WDS 03271+1845 = CHARA 10
andWDS 04044+2406 = McA 13 Aa are calculated total masses and dynamical
parallaxes which are compared with corresponding Hipparcos parallaxes.
The contribution of the dark matter to the rotation of spiral galaxies and its mass distribution
Authors: Ninkovic S.
Published: July 2012

The rotation of a test spiral galaxy with two contributors - the disc and the
corona - is considered. The disc is exponential, whereas the corona is the
dark subsystem. For the latter several variants of mass distribution are
considered. It is found that the homogeneous sphere is almost unavoidable if
the circular velocity has a continuous increase, at least in its observable
part. On the other hand the rather often applied quasi-isothermal law offers
the most satisfactory fit for the case of constant circular velocity though
the classical Schuster law may also be used, especially taking into account
its simplicity and the consequent possibility of generalising its potential
towards the more general case of axial symmetry.
On the stark width regularities in the singly ionized argon spectrum
Authors: Djenize S.
Published: July 2012

The existence of the Stark width dependence on the upper-level ionization
potential of the quantum transition have been presented for the four types of
transitions (4s? - 4p?, 4p? - 4d?, 4p - 5s, 3d - 4p?) in the singly ionized
argon spectrum (Ar II). On the basis of established regularities the Stark
width values for 6 spectral lines, not measured or calculated before, have
been predicted. Critical analysis of the existing experimental Stark width
data are, also, given.
Stark broadening parameter tables for neutral zinc spectral lines
Authors: Dimitrijevic M.S. , Sahal−Bréchot S.
Published: July 2012

Using a semiclassical approach, we have calculated electron?, proton? and He
II?impact line widths and shifts for 32 Zn I multiplets as a function of
temperature and perturber density.
Scientific and professional activity of professor Jelenko M. Mihailovic (1869-1956)
Authors: Banjac N.
Published: July 2012

The Scientific and professional activity of distinguished seismologist,
Professor Jelenko M. Mihailovic is presented, and his bibliography is listed.
He was coworker of Milan Nedeljkovic the founder of Belgrade Astronomical
Observatory from 1893 up to 1906. During this time Mihailovi?c was his
assistant working on Belgrade Astronomical Observatory and even on the post
of vice director.
Glucotoxicity Induces Glucose-6-Phosphatase Catalytic Unit Expression by Acting on the Interaction of HIF-1α With CREB-Binding Protein
Authors: Gautier-Stein Amandine , Soty Maud , Chilloux Julien , Zitoun Carine , Rajas Fabienne , Mithieux Gilles
Published: July 2012

The activation of glucose-6-phosphatase (G6Pase), a key enzyme of endogenous glucose production, is correlated with type 2 diabetes. Type 2 diabetes is characterized by sustained hyperglycemia leading to glucotoxicity. We investigated whether glucotoxicity mechanisms control the expression of the G6Pase catalytic unit (G6pc). We deciphered the transcriptional regulatory mechanisms of the G6pc promoter by glucotoxicity in a hepatoma cell line then in primary hepatocytes and in the liver of diabetic mice. High glucose exposure induced the production of reactive oxygen species (ROS) and, in parallel, induced G6pc promoter activity. In hepatocytes, glucose induced G6pc gene expression and glucose release. The decrease of ROS concentrations by antioxidants eliminated all the glucose-inductive effects. The induction of G6pc promoter activity by glucose was eliminated in the presence of small interfering RNA, targeting either the hypoxia-inducible factor (HIF)-1α or the CREB–binding protein (CBP). Glucose increased the interaction of HIF-1α with CBP and the recruitment of HIF-1 on the G6pc promoter. The same mechanism might occur in hyperglycemic mice. We deciphered a new regulatory mechanism induced by glucotoxicity. This mechanism leading to the induction of HIF-1 transcriptional activity may contribute to the increase of hepatic glucose production during type 2 diabetes.
Spectrum of Dermatoses among Paediatric Patients in a Teaching Hospital of Western Nepal
Authors: Neupane S , Pandey P
Published: July 2012

DOI: http://dx.doi.org/10.3126/njdvl.v10i1.6419 NJDVL 2012; 10(1): 20-26
A Comparative Study of Azithromycin Versus Doxycycline in the Treatment of Acne Vulgaris
Authors: Amatya A , Chaudhary M K , Khan D K , Rajouria E A
Published: July 2012

DOI: http://dx.doi.org/10.3126/njdvl.v10i1.6421 NJDVL 2012; 10(1): 33-40
Psoriasis: Clinical and Epidemiological Features in a Hospital Based Study
Authors: Shrestha D P , Gurung D
Published: July 2012

DOI: http://dx.doi.org/10.3126/njdvl.v10i1.6422 NJDVL 2012; 10(1): 41-45
Leflunomide Induced DRESS Syndrome: A Case Report
Authors: Parajuli S , Chaudhary D , Pandey S , Baral S , Pokhrel D B
Published: July 2012

DOI: http://dx.doi.org/10.3126/njdvl.v10i1.6423 NJDVL 2012; 10(1): 46-48
Klippel -Trenaunay Syndrome: A Case Report
Authors: Paudel U , Gupta Sonia , Pant A , Bagaria R S , Shrestha D P
Published: July 2012

DOI: http://dx.doi.org/10.3126/njdvl.v10i1.6424 NJDVL 2012; 10(1): 49-52
List of Abstracts
Authors: Editor The
Published: July 2012

DOI: http://dx.doi.org/10.3126/njdvl.v10i1.6425 NJDVL 2012; 10(1): 54-58
SODVELON News, Events and Transactions
Authors: Parajuli Dr. Sudip
Published: July 2012

DOI: http://dx.doi.org/10.3126/njdvl.v10i1.6426 NJDVL 2012; 10(1): 59-61