bluuebunny/crossref_metadata_2025 huggingface dataset:
Acúmulo de NPK e sódio na mamoneira sob estresse salino e adubação nitrogenada
Authors: Nobre Reginaldo G. , Soares Lauriane A. dos A. , Gheyi Hans R. , Lima Geovani S. de , Lourenço Givanildo da S. , Soares Saulo da S.
Published: October 2013

Objetivou-se, com esta pesquisa, avaliar os efeitos da irrigação com água de diferentes salinidades e doses de nitrogênio, sobre a acumulação de NPK e sódio na parte aérea da mamoneira, em experimento conduzido em lisímetros. Utilizou-se aleatorização em bloco em esquema fatorial 5 x 5, com três repetições, estudando-se os cinco níveis de condutividade elétrica da água (CEa), variando de 0,4 a 4,4 dS m-1, associados a cinco doses de nitrogênio (50 a 150% da recomendada). Os teores de NPK e de sódio na cv. BRS Energia foram maiores nas folhas que no caule e entre as épocas de avaliação, aos 120 dias após a semeadura (DAS) em relação aos 46 DAS. Nas folhas os teores acumulados aos 46 DAS, variou na sequência K > Na > N > P e aos 120 DAS K > N > Na > P; enquanto no caule variaram em ambas as épocas, a ordem foi Na > K > P ≥ N e em função da CEa e K> Na> P ≥ N em função das doses de N aos 46 DAS níveis crescentes de CEa promoveram aumento no teor de Nfolha e Kfolha assim como o incremento da adubação com N inibiu o teor de Na folha; aos 120 DAS o maior teor de Nfolha foi obtido com a CEa de 4,4 dS m-1 e a dose de N de 150%, já o teor de Kfolha e Kcaule foi obtido na dose de 150% de N enquanto o teor de P não foi influenciado por nenhum fator estudado.
Desafios para o ensino de ciências na classe hospitalar: relato de uma experiência com pesquisa e ensino na formação de professores
Authors: Linheira Caroline Zabendzala , Cassiani Suzani , Mohr Adriana
Published: October 2013

O atendimento escolar hospitalar foi instituído enquanto política no Brasil através do Estatuto da Criança e do Adolescente. Em Santa Catarina, há classes hospitalares desde o ano de 1999. A Classe Hospitalar do Hospital Infantil Joana de Gusmão, em Florianópolis, foi pioneira em instituir um atendimento escolar, tendo como princípio o desenvolvimento de atividades curriculares. O texto apresenta e discute o ensino de Ciências desenvolvido na classe hospitalar, em uma experiência pioneira de um grupo de pesquisa em integração com equipe pedagógica do hospital. A pesquisa foi qualitativa do tipo estudo de caso e desenvolveu-se com o objetivo de caracterizar a atividade docente neste espaço educacional. Apresentamos resultados referentes a estratégias de ensino e atividades didáticas utilizadas. Na análise, apontamos problemas e possíveis caminhos para o desenvolvimento de práticas pedagógicas neste tipo de ambiente escolar. Ao final do trabalho, apontamos temáticas e recursos com maior sucesso de uso neste contexto.
Investigando princípios de design de uma sequência didática sobre metabolismo energético
Authors: Sarmento Anna Cássia de Holanda , Muniz Cássia Regina Reis , Silva Natália Rodrigues da , Pereira Valter Alves , Santana Maria Aparecida dos Santos , Sá Thiago Serravalle de , El-Hani Charbel Niño
Published: October 2013

Este artigo contempla uma investigação sobre princípios de design de uma sequência didática que visa favorecer a aprendizagem sobre metabolismo energético na primeira série do Ensino Médio. O estudo foi realizado por pesquisadores e professores-investigadores reunidos numa equipe colaborativa. Consideramos, na sequência, critérios de justificação a priori, relativos a aspectos epistemológicos, psicocognitivos e didáticos. Na validação a posteriori, utilizamos pré- e pós-testes, triangulando métodos quantitativos e qualitativos. Os princípios de design incluíram: uso de textos de divulgação científica, contextualização dos assuntos em relação ao cotidiano dos estudantes, processo coletivo e cooperativo de aprendizagem. A intervenção mostrou efeitos positivos dos princípios de design quanto à motivação dos estudantes e à aprendizagem de conteúdos, sobretudo sobre transformações de energia, fermentação e biotecnologia. Contudo, algumas concepções alternativas resistiram a mudanças, especialmente aquelas relativas à fotossíntese e respiração celular, fornecendo indicações para o aprimoramento dos princípios de design e de sua implementação em sala.
O sistema respiratório nos livros didáticos de ciências das séries iniciais: uma análise do conteúdo, das imagens e atividades
Authors: Ruppenthal Raquel , Schetinger Maria Rosa Chitolina
Published: October 2013

Este trabalho busca, na análise de livros didáticos dos anos iniciais, as possíveis causas das lacunas explicativas que alunos dos anos finais apresentam sobre o sistema respiratório. Para isto, realizou-se a análise relativa a: espaço, conceitos, imagens, atividades práticas e exercícios propostos nas unidades referentes ao sistema respiratório de livros de ciências dos anos iniciais. Os resultados dessa análise apontam a existência de falhas explicativas em textos e imagens e a grande quantidade de imagens decorativas, o que pode comprometer a aprendizagem de conceitos. Constataram-se mudanças positivas nos livros do PNLD 2010, mas que a utilização dos mesmos deve ser feita com senso crítico pelos professores.
Grupos colaborativos como ferramenta na reestruturação do modelo didático do professor de química
Authors: Santos Júnior João Batista dos , Marcondes Maria Eunice Ribeiro
Published: October 2013

Esta investigação apresenta os resultados de um estudo sobre como um projeto colaborativo envolvendo professores de Química pode servir como instrumento para a reflexão dos docentes sobre as suas concepções e práticas pedagógicas, e, também, para resgatar deficiências na formação inicial destes que, por ventura, ainda não foram sanadas no exercício da docência. A análise das reestruturações de cada docente foi feita a partir de seus respectivos modelos didáticos. Para tal, foi utilizado um inventário para identificar esses modelos, de modo que foi possível compará-los antes e depois dos trabalhos do grupo de aprendizagem colaborativa.
Alfabetização científica e educação inclusiva no discurso de professores formadores de professores de ciências
Authors: Vilela-Ribeiro Eveline Borges , Benite Anna Maria Canavarro
Published: October 2013

A complexidade de ensinar ciências em salas de aulas inclusivas é evidenciada pela falta de preparo dos professores e das escolas em transpor a linguagem científica para as pessoas com diferentes necessidades de aprendizagem. Dialogar com professores formadores é uma iniciativa que tem por intuito incentivar essa discussão em um espaço em que ela não acontecia. Nosso objetivo consistiu em analisar concepções sobre alfabetização científica e temas em educação inclusiva nos discursos de professores formadores de ciências (Biologia, Física, Matemática e Química), em uma instituição de Ensino Superior em Jataí, Goiás. Foram realizadas entrevistas, gravadas em áudio, transcritas e analisadas a partir da Análise de Conteúdo. Os professores compreendem a alfabetização científica como fundamental para os cidadãos, e interpretam que todos os cidadãos têm direito a aprender ciência. Portanto, devem existir soluções para que essa alfabetização científica aconteça de modo eficiente, e que professores devem ser formados para isso.
O imperativo do afeto na educação infantil: a ordem do discurso de pedagogas em formação
Authors: Carvalho Rodrigo Saballa de
Published: October 2013

Este artigo apresenta resultados de uma pesquisa que teve como foco de análise a problematização dos discursos sobre afeto docente presentes em relatórios de um estágio realizado em turmas de Educação Infantil por 30 acadêmicas de Pedagogia em fase de conclusão do curso. O objetivo do artigo é problematizar como os discursos sobre afeto se constituem enquanto imperativos que inventam e regulam os modos de exercício docente. O campo de estudos no qual se fundamentou a pesquisa foi o dos estudos culturais e dos estudos desenvolvidos por Michel Foucault. A metodologia consistiu na análise do discurso foucaultiana, por meio da qual foram destacadas as regularidades e inflexões presentes nos relatórios. Estes foram escritos a partir de elementos recordatórios, como fotos, planejamentos e demais registros das acadêmicas. A análise evidenciou a assunção da afetividade como um imperativo profissional associado a um processo de generificação da docência. A partir da pesquisa, concluiu-se que os significados do afeto no exercício da docência só existem como resultados inacabados de processos que tratam de nomeá-lo e conformá-lo. Por essa razão, se for assumida a perspectiva de que os discursos que tomam o afeto como imperativo docente presentes nos relatórios analisados são produzidos pelas práticas sociais, pelas relações de poder e pelo tipo de lógica disciplinar que os operacionaliza, é possível desnaturalizá-los e reinventá-los, experimentando outros modos de agir e de pensar o exercício da docência na Educação Infantil.
Demanda aeroportuária de Manaus e sua influência para o setor de turismo da região
Authors: Falcão Viviane Adriano
Published: October 2013

O presente artigo tem como objetivo fazer um estudo da demanda de passageiros pelo aeroporto Eduardo Gomes de Manaus e analisar a influência para o setor de turismo. A partir deste estudo, fez-se uma previsão do crescimento orgânico da demanda de passageiros para o ano de 2014. Para prever a demanda, foram utilizadas ferramentas econométricas com o objetivo de desenvolver modelos de previsão da demanda de passageiros. Os resultados obtidos mostram que a demanda total de passageiros projetada para 2014 é de mais de 3,8 milhões, bem acima da capacidade atual de 2,5 milhões de passageiros anuais. Para o setor de turismo, o fluxo da região chegará em 2014 com uma demanda anual de 59 mil turistas. Esta demanda mais que duplica a quantidade de turistas que existe atualmente. Esses resultados demonstram a necessidade de um investimento na infraestrutura do aeroporto Internacional Eduardo Gomes, bem como na infraestrutura turística.
Análise da competitividade do transporte aéreo com base no nível de serviço percebido pelo usuário
Authors: Nascimento Marcus Vinícius
Published: October 2013

Este artigo apresenta uma análise crítica sobre a qualidade percebida pelos usuários de serviços do transporte aéreo. Utilizou-se da literatura para determinar como se efetua a avaliação do nível de serviço pelo usuário e como esta pode ser aplicada no sistema de transporte aéreo. Em seguida, foi apresentado um indicativo para mensurar a insatisfação do usuário quanto alguns critérios, como o tempo de espera para a restituição de bagagem, que, segundo especialistas da área, foram responsáveis pelos piores índices de qualidade observada no transporte aéreo de passageiros nos EUA. Os resultados das avaliações apresentadas por este estudo indicam medidas que possam ser tomadas pelas companhias aéreas na mobilização para uma melhor prestação de serviços como a criação de centros de informações para os passageiros e, também, a ação das autoridades reguladoras do serviço do transporte aéreo na aplicação de possíveis multas, visto a observância de problemas com a qualidade do serviço.
Seleção de uma aeronave para atividades de charter regional com utilização do método multicritério de borda modificado com utilização de mediana
Authors: Fernandes João Erick de Mattos , Gomes Luiz Flávio Autran Monteiro , Mello João Carlos Correia Baptista Soares de , Gomes Júnior Silvio Figueiredo
Published: October 2013

Este trabalho busca auxiliar na solução de um problema de seleção de uma aeronave enfrentado por uma empresa aérea que estuda o investimento na atividade de voo charter regional. A empresa em análise, pertencente a um grupo econômico cujo negócio principal é a logística, dispõe de oito alternativas a serem avaliadas sob onze diferentes critérios. A metodologia utilizada para a solução do problema é um novo método de apoio à decisão multicritério derivado do método de Borda, denominado Método de Borda com Utilização das Medianas. A utilização do método se justifica por sua característica de ser menos influenciado que o método original pelas alternativas irrelevantes e por sua facilidade de entendimento e baixa complexidade computacional. O método forneceu resultados consistentes, dando suporte confiável à decisão.
Modelo de quatro etapas aplicado ao planejamento de transporte de carga
Authors: Souza Cristiane Duarte Ribeiro de , D'Agosto Márcio de Almeida
Published: October 2013

Este artigo tem como objetivo analisar estudos de planejamento de transporte de carga que utilizam o modelo de quatro etapas, ferramenta capaz de estimar o fluxo de tráfego interzonal, considerando a geração e distribuição de viagens, a escolha modal e a alocação de fluxo, destacando sua abrangência e utilidade em apoiar o desenvolvimento socioeconômico do país. Foi realizada revisão bibliográfica em periódicos indexados, teses, dissertações e relatórios técnicos, selecionando-se 44 trabalhos com destacando para 7 trabalhos que enfocam o modelo de quatro etapas integralmente. Verificou-se que este modelo é versátil, pode ser empregado de forma integral ou parcial, considerando fluxos de unidade de massa ou de veículos, no caso destes últimos diretamente aplicáveis ao dimensionamento de infraestrutura de tráfego, em todos os níveis de abrangência geográfica (de municípios a países), sem limitação do tipo de carga que pode ser transportada por qualquer dos cinco modos de transporte ou suas combinações, configurando ferramenta de planejamento estratégico e apoio ao desenvolvimento socioeconômico do país.
Simulation modelling to analyse the current level of utilisation of sections along a rail route
Authors: Woroniuk Clare , Marinov Marin
Published: October 2013

This research aims to assess the level of utilisation of sections along a rail route by employing a series of simulation models. For the purposes of this research a multi method approach has been implemented which includes data collection, data analysis, modelling, model exploitation, measures of system performance and conclusion. Analytical methods and concepts in the study of railway freight lines and networks are presented. The discrete event based simulation models employed in this research have been implemented to study the rail route from Silla to Castellbisbal in Eastern Spain. The output from the models suggests that the current rate of utilisation is insignificant therefore different scenarios have been generated. These are based on changes to traffic rules, wherein the total number of services operated on the line is varied between the different scenarios. This paper concludes that it is possible to significantly increase the level of utilisation along the rail route from the current scenario. A contribution to knowledge is presented through the implementation of the simulation software Arena to study utilisation along a rail freight route.
A model for estimating airline passenger trip reliability metrics from system-wide flight simulations
Authors: Sherry Lance
Published: October 2013

Analysis of the benefits of government modernization initiatives for airports or air traffic control are conducted using complex software models that simulate up to 60,000 flights per day. These flight-centric simulations do not model passenger flows and therefore do not account for passenger trip delays due to cancelled flights and missed connections, which account for up to 60% of the total passenger trip delays. This paper describes a closed-form model for estimating passenger trip reliability metrics from flight delay data from system-wide simulations. The outputs of the model, (i) percent passengers disrupted, (ii) average passenger trip delay, and (iii) total passenger trip delays, are derived from the probability of delayed flights and network structure parameters. The model highlights the role of network structure, in addition to flight on-time performance, on passenger trip reliability. These results have implications for government and industry initiatives to improve flight on-time performance through modernization, consumer protection, and the conduct of benefits analysis.
Methodologies based on seedling performance for vigor assessment of pumpkin seeds
Authors: Souza Rita Herminia Vaz de , Villela Francisco Amaral , Aumonde Tiago Zanatta
Published: October 2013

Seed vigor tests provide additional information provided by the germination test, producing more consistent data in different field conditions. This study aimed to evaluate procedures and methodologies for vigor testing to indicate which tests are sensitive to identify vigor levels between lots of pumpkin and squash seeds. Two species pumpkin (Cucurbita maxima) and squash (Cucurbita pepo) were used, and each one was represented by four lots, whose initial quality was assessed using the following tests: germination and first count, earliness of rdicle emission, speed, coefficient of velocity and mean germination time, Timson's index, vigor rating, seedling emergence, and mean emergence rate. In the test of earliness of rdicle emission at two days, there was no difference between lots of Cucurbita maxima, and there was adequate separation of Cucurbita pepo lots, while the cool germination test rated lots similarly to the primary root emergence test. For the Pumpkin and Caserta seeds, the cool germination, primary root emergence at 3 and 4 days and seedling vigor rating tests showed separation efficiency of lots as for physiological potential.
Acetabular Component Anteversion in Primary and Revision Total Hip Arthroplasty: An Observational Study
Authors: Reikerås Olav , Gunderson Ragnhild B.
Published: October 2013

Purpose:

In a prospective manner to evaluate the range of acetabular component anteversion actually achieved by the use of a cup positioner in cementless revision and primary THA.

Methods:

We operated 71 patients with cementless primary THA, and 26 patients with cementless acetabular revision surgery. We aimed to obtain cup anteversion of 10 to 30° with an impactor-positioner. In all cases we used elevated liners and a ceramic head with diameter 28. At 3 months postoperatively the component versions were measured using CT with the patient in supine position.

Results:

The acetabular component version in the primary hips ranged from 28° of retroversion to 42° of anteversion with a mean of 17.4 ± 14.0°, while the cup version in the revision hips ranged from 4° of retroversion to 32° of anteversion with a mean of 15.0 ± 9.6°(p=0.427). The anteversion of 40 (56%) of the primary acetabular components were within the target zone of 10 to 30°, while 19 (27%) were below the target zone and and 12 (17%) were above the target range. The anteversion of 19 (73%) of the revision acetabular components were within the target zone, while 6 (23%) were below the target zone and 1 (4%) were above the target range. The differences in distribution between the primary and revision operations were not significant (p=0.183).

Conclusions:

The intraoperative estimation of acetabular anteversion by free hand technique in many cases was not within the intended range of 10 to 30° in either primary or revision THA and with no differences between the two series
Overwinter Mortality of Sympatric Juvenile Bluegill and Yellow Perch in
Mid-Temperate Sandhill lakes, Nebraska, U.S.A
Authors: Jolley Jeffrey C. , Kaemingk Mark A. , Willis David W. , S. Holland Richard
Published: October 2013

Substantial mortality can occur in age-0 fish populations during their first year of life, especially in winter; this
can potentially influence overall recruitment into the adult population. As such, we compared relative abundances between
fall and spring catches of sympatric juvenile bluegill Lepomis macrochirus Rafinesque and yellow perch Perca
flavescens (Mitchill) to evaluate the magnitude of overwinter mortality across locations (five lakes for two years) and
through time (one lake for six years). In addition, we compared both quantile-quantile and increment plots, based on
length-frequency histograms from fall- and spring-caught cohorts from 2004 to 2010, to determine if mortality was sizeselective
while accounting for over winter growth. Bluegill relative abundances (as indexed by catch-per-unit-effort) significantly
decreased from fall to spring, although size-selective mortality was not detected in 10 instances. Yellow perch
relative abundances were similar from fall to spring in five Nebraska Sandhill lakes; however, size-selective mortality was
detected, with size-selective over winter mortality of smaller individuals occurring in one of eight instances, whereas
greater mortality in larger individuals occurred in two instances. Positive growth occurred in both species but was variable
among lakes and appeared to be system-specific. In Nebraska Sandhill lakes, over winter mortality likely differs between
these two species in its severity, size-selective effect, and scale (i.e., lake-specific vs. large-scale processes), and is likely
influenced by combinations of these (and potentially other) factors.
Methodological approaches to infer end-of-winter snow distribution on alpine glaciers
Authors: Sold Leo , Huss Matthias , Hoelzle Martin , Andereggen Hubert , Joerg Philip C. , Zemp Michael
Published: October 2013

Snow accumulation is an important component of the mass balance of alpine glaciers. To improve our understanding of the processes related to accumulation and their representation in state-of-the-art mass-balance models, extensive field measurements are required. We present measurements of snow accumulation distribution on Findelengletscher, Switzerland, for April 2010 using (1) in situ snow probings, (2) airborne ground-penetrating radar (GPR) and (3) differencing of two airborne light detection and ranging (lidar) digital elevation models (DEMs). Calculating high-resolution snow depth from DEM-differencing requires careful correction for vertical ice-flow velocity and densification in the accumulation area. All three methods reveal a general increase in snow depth with elevation, but also a significant small-scale spatial variability. Lidar-differencing and in situ snow probings show good agreement for the mean specific winter balance (0.72 and 0.78 m w.e., respectively). The lidar-derived distributed snow depth reveals significant zonal correlations with elevation, slope and curvature in a multiple linear regression model. Unlike lidar-differencing, GPR-derived snow depth is not affected by glacier dynamics or firn compaction, but to a smaller degree by snow density and liquid water content. It is thus a valuable independent data source for validation. The simultaneous availability of the three datasets facilitates the comparison of the methods and contributes to a better understanding of processes that govern winter accumulation distribution on alpine glaciers.
Desire for a Child in Rural Area of Bangladesh: A Logistic Regression Analysis
Authors: Islam Md Rafiqul , Rahman Md Mahfuzar
Published: October 2013

The main focus of this study is to draw attention to some demographic, socio-cultural and economic, and programmatic factors, which are affecting the desire for a child in rural area of Bangladesh. The study shows that about 40% of the rural women aged 10-49 years desired for a child. Applying logistic regression model with R2 and correct classification rate for checking the quality of fit on Bangladesh Demographic and health Survey (BDHS) 2004 data, the findings indicate that for achieving the replacement level fertility, the family planning program should be strengthened among the ever-married women under age 30 years. The probability of desire for an additional child is significantly higher in Chittagong and Sylhet divisions. It has also been clearly observed that desire for a child is higher among women having age at marriage 18+ years and also among women having higher education. Women having access to mass media especially TV have a statistically lower probability in desiring for a child than those without access. The probability of desire for an additional child is significantly lower for women who are involved to NGOs than that of the women who are not involved. Finally, the paper provides some suggestive policy measures so that the planners and implementers may take appropriate initiatives for achieving the replacement level fertility in Bangladesh. DOI: http://dx.doi.org/10.3329/rujs.v38i0.16550 Rajshahi University J. of Sci. 38, 75-86 (2010)
Particle Induced X-ray Emission (PIXE): A Tool of Qualitative Elemental Analysis for Biological Sample
Authors: Kabir M Hasnat
Published: October 2013

The facility of ion beam laboratory at Kochi University of Technology (KUT) has been extended by installing the Particle Induced X-ray Emission (PIXE) technique, in order to provide qualitative and quantitative elemental analysis and in-air micro-PIXE analysis. This paper is a description of PIXE setup and its application in biological sample for qualitative elemental analysis. The energy calibration of the system shows linearity. The minimum detection limit indicates that the system has good detection limit. The homogeneity shows uniformity of the sample itself and the internal standard within the sample. A 4 MeV He++ ion beam was used to analyze shellfish samples. Analyzing samples, it was found that the lower Z elements as well as some trace elements were detected. DOI: http://dx.doi.org/10.3329/rujs.v39i0.16538 Rajshahi University J. of Sci. 39, 01-10 (2011)
Groundwater Balance Study in the High Barind, Bangladesh
Authors: Reza AHM Selim , Mazumder Quamrul Hasan , Ahmed Mushfique
Published: October 2013

The annual groundwater recharge and discharge of aquifer of the Sapahar and Porsha Upazillas is estimated by Thiessen polygon method varies from 106.41 to 244 Mm3 and 93.77 to 291 Mm3 respectively. The calculated groundwater recharge of aquifer of the study area shows that the rate of groundwater recharge of aquifer in Porsha Upazilla is higher than that of Sapahar Upazilla and is characterized by very suitable groundwater storage potential. The overall groundwater balance study in the study area indicates that there exists a balance between annual recharge and withdrawal up to 1993 but after period of 1993 discharge exceeds the recharge continuing till today. But hereforth a cumulative annual deficit is found to exist because of progressive annual discharge in Sapahar Upazilla. 23.99 to 42.08 Mm3 of groundwater is discharged by discharging mechanisms. The rest of groundwater is discharged by natural seepage. DOI: http://dx.doi.org/10.3329/rujs.v39i0.16539 Rajshahi University J. of Sci. 39, 11-26 (2011)
Palmitic Acid on Salt Subphases and in Mixed Monolayers of Cerebrosides: Application to Atmospheric Aerosol Chemistry
Authors: Adams Ellen , Allen Heather
Published: October 2013

Palmitic acid (PA) has been found to be a major constituent in marine aerosols, and is commonly used to investigate organic containing atmospheric aerosols, and is therefore used here as a proxy system. Surface pressure-area isotherms (π-A), Brewster angle microscopy (BAM), and vibrational sum frequency generation (VSFG) were used to observe a PA monolayer during film compression on subphases of ultrapure water, CaCl2 and MgCl2 aqueous solutions, and artificial seawater (ASW). π-A isotherms indicate that salt subphases alter the phase behavior of PA, and BAM further reveals that a condensation of the monolayer occurs when compared to pure water. VSFG spectra and BAM images show that Mg2+ and Ca2+ induce ordering of the PA acyl chains, and it was determined that the interaction of Mg2+ with the monolayer is weaker than Ca2+. π-A isotherms and BAM were also used to monitor mixed monolayers of PA and cerebroside, a simple glycolipid. Results reveal that PA also has a condensing effect on the cerebroside monolayer. Thermodynamic analysis indicates that attractive interactions between the two components exist; this may be due to hydrogen bonding of the galactose and carbonyl headgroups. BAM images of the collapse structures show that mixed monolayers of PA and cerebroside are miscible at all surface pressures. These results suggest that the surface morphology of organic-coated aerosols is influenced by the chemical composition of the aqueous core and the organic film itself.
Elastic Properties of CaSiO3 Perovskite from ab initio Molecular Dynamics
Authors: Ono Shigeaki
Published: October 2013

Ab initio molecular dynamics simulations were performed to investigate the elasticity of cubic CaSiO3 perovskite at high pressure and temperature. All three independent elastic constants for cubic CaSiO3 perovskite, C11, C12, and C44, were calculated from the computation of stress generated by small strains. The elastic constants were used to estimate the moduli and seismic wave velocities at the high pressure and high temperature characteristic of the Earth’s interior. The dependence of temperature for sound wave velocities decreased as the pressure increased. There was little difference between the estimated compressional sound wave velocity (VP) in cubic CaSiO3 perovskite and that in the Earth’s mantle, determined by seismological data. By contrast, a significant difference between the estimated shear sound wave velocity (VS) and that in the Earth’s mantle was confirmed. The elastic properties of cubic CaSiO3 perovskite cannot explain the properties of the Earth’s lower mantle, indicating that the cubic CaSiO3 perovskite phase is a minor mineral in the Earth’s lower mantle.
Ultrasound-Assisted Extraction (UAE) and Solvent Extraction of Papaya Seed Oil: Yield, Fatty Acid Composition and Triacylglycerol Profile
Authors: Samaram Shadi , Mirhosseini Hamed , Tan Chin , Ghazali Hasanah
Published: October 2013

The main objective of the current work was to evaluate the suitability of ultrasound-assisted extraction (UAE) for the recovery of oil from papaya seed as compared to conventional extraction techniques (i.e., Soxhlet extraction (SXE) and solvent extraction (SE)). In the present study, the recovery yield, fatty acid composition and triacylglycerol profile of papaya seed oil obtained from different extraction methods and conditions were compared. Results indicated that both solvent extraction (SE, 12 h/25 °C) and ultrasound-assisted extraction (UAE) methods recovered relatively high yields (79.1% and 76.1% of total oil content, respectively). Analysis of fatty acid composition revealed that the predominant fatty acids in papaya seed oil were oleic (18:1, 70.5%–74.7%), palmitic (16:0, 14.9%–17.9%), stearic (18:0, 4.50%–5.25%), and linoleic acid (18:2, 3.63%–4.6%). Moreover, the most abundant triacylglycerols of papaya seed oil were triolein (OOO), palmitoyl diolein (POO) and stearoyl oleoyl linolein (SOL). In this study, ultrasound-assisted extraction (UAE) significantly (p < 0.05) influenced the triacylglycerol profile of papaya seed oil, but no significant differences were observed in the fatty acid composition of papaya seed oil extracted by different extraction methods (SXE, SE and UAE) and conditions.
G-Quadruplexes as Potential Therapeutic Targets for Embryonal Tumors
Authors: Shalaby Tarek , Fiaschetti Giulio , Nagasawa Kazuo , Shin-ya Kazuo , Baumgartner Martin , Grotzer Michael
Published: October 2013

Embryonal tumors include a heterogeneous group of highly malignant neoplasms that primarily affect infants and children and are characterized by a high rate of mortality and treatment-related morbidity, hence improved therapies are clearly needed. G-quadruplexes are special secondary structures adopted in guanine (G)-rich DNA sequences that are often present in biologically important regions, e.g. at the end of telomeres and in the regulatory regions of oncogenes such as MYC. Owing to the significant roles that both telomeres and MYC play in cancer cell biology, G-quadruplexes have been viewed as emerging therapeutic targets in oncology and as tools for novel anticancer drug design. Several compounds that target these structures have shown promising anticancer activity in tumor xenograft models and some of them have entered Phase II clinical trials. In this review we examine approaches to DNA targeted cancer therapy, summarize the recent developments of G-quadruplex ligands as anticancer drugs and speculate on the future direction of such structures as a potential novel therapeutic strategy for embryonal tumors of the nervous system.
Volatile Compounds Profile of Sous-Vide Cooked Pork Cheeks as Affected by Cooking Conditions (Vacuum Packaging, Temperature and Time)
Authors: Del Pulgar Jose , Roldan Mar , Ruiz-Carrascal Jorge
Published: October 2013

The volatile organic compound (VOC) profile of pork cheeks as affected by the cooking conditions was investigated. Pork cheeks were cooked under different combinations of temperature (60 °C or 80 °C), time (5 or 12 h) and vacuum (vacuum or air-packaged). As a general rule, the VOCs originating from lipid degradation were positively affected by the cooking temperature and negatively by the cooking time, reaching the highest amounts in pork cheeks cooked at 80 °C during 5 h and the lowest in samples cooked at 80 °C during 12 h. On the contrary, VOCs originated from amino acids and Maillard reactions were positively affected by both factors. The proportion between lipid degradation and amino acids reactions was estimated by the hexanal/3-methylbutanal ratio, which reached its highest values in samples cooked at 60 °C during 5 h in the presence of air and the lowest values in samples cooked at 80 °C during 12 h, regardless of the vacuum status.
Policy and Tourism Development as Exemplified by the Lublin Region (Southeast Poland)
Authors: Tucki Andrzej , Świeca Andrzej
Published: October 2013

Since the late 1980s a number of countries in Central and Eastern Europe (CEE) have emerged from an environment of centralized planning to models closer to Western European ones. This process of transformation occurred specially at a regional level, where tourism is examined as a vehicle
for sustainable development especially in Europe's less developed regions. Within this context, local authorities' role in tourism development is examined. In this study it was assumed that tourist policy is composed of three fundamental groups of components: the activity of local authority
and management of tourism in the municipality; promotion and information; cooperation. The relevant data reflect the socioeconomic changes that have been taking place in Poland for about 15 years at the central and local level.
Survival of a tertiary relict species, Liriodendron chinense (Magnoliaceae), in southern China, with special reference to village fengshui forests
Authors: Tang Cindy Q. , Yang Yongchuan , Ohsawa Masahiko , Momohara Arata , Mu Jingze , Robertson Kevin
Published: October 2013

• Premise of the study: We investigate factors supporting the persistence in southern China of a rare Tertiary relict tree species, Liriodendron chinense, which has been almost eliminated by recent land use conversion. We hypothesize that cultural practices and traditional sustainable forest resource uses provide niches for the species’ regeneration that will complement infrequent natural disturbances, while the species’ survival on remote mountain slopes where there are no humans depends on natural disturbances alone.

• Methods: We examined and analyzed various landscape contexts, community associations, age distributions, and regeneration patterns of Liriodendron chinense.

• Key results: Forest communities containing Liriodendron chinense were of three types: (1) village fengshui forests—mature forests dominated by Tertiary relict taxa Liriodendron, Toona, and Emmenopterys, protected for their supposed spiritual value; (2) young secondary forests near villages, dominated solely by Liriodendron; and (3) old secondary forest remnants on mountain slopes far from villages, dominated by Liriodendron with other Tertiary relicts of the genera Davidia and Sassafras. The age structure of Liriodendron indicated ample recruitment in the first two forest types, where the activities of local people have provided regeneration niches for the survival of this shade‐intolerant pioneer species. On the remote mountain slopes that have never been converted to agriculture, Liriodendron has survived through regeneration made possible by natural disturbances.

• Conclusions: The traditional human land use, influenced by cultural values, has supplemented infrequent natural disturbances, providing regeneration niches for this and other Tertiary remnant species near villages in mountain valleys, while on uninhabited mountain slopes the species depends on natural disturbances to survive.
La charge émotionnelle chez les adolescents dits « de banlieue »
Authors: Derivois Daniel
Published: October 2013

Les adolescents vivant en banlieue expriment souvent la honte de leurs origines sociales, culturelles et géographiques. Cette problématique est (ré)inscrite dans la géopolitique des émotions dans le monde, et ce afin de mieux comprendre les enjeux identitaires pour les adolescents. À partir de deux vignettes cliniques d’adolescents rencontrés en Maison d’Enfants à Caractère Social, nous montrons l’importance du contre-transfert culturel et de l’écoute à plusieurs niveaux dans l’élaboration de la charge émotionnelle à travers le processus créateur.
« Ta mère, elle est tellement... » joutes verbales et insultes rituelles chez des adolescents issus de l'immigration francophone
Authors: Bertucci Marie-Madeleine , Boyer Isabelle
Published: October 2013

Les joutes verbales et les insultes rituelles, observables chez les adolescents issus de l’immigration francophone, constituent un mode de communication et une forme de pratique culturelle. Ces « vannes » sont souvent considérées comme un emblème de l’incivilité linguistique et un marqueur de la « culture des rues ». Elles trouveraient leur origine dans une culture de l’éloquence, issue des traditions populaires de l’immigration francophone maghrébine et africaine. En tant que jeu rituel, elles contribuent à la socialisation des jeunes au sein du groupe de pairs.
Mutilations génitales féminines entre fantasme et pratiques sociales
Authors: De Micco Virginia
Published: October 2013

Après un encadrement socio-anthropologique de ce que l’on appelle les mutilations féminines génitales, est examiné, à travers une séquence clinique, leur envers inconscient le plus profond. De telles pratiques sociales éclairent à leur tour le fondement inconscient de certaines manifestations cliniques, surtout en ce qui concerne les adolescents et leurs « rites de passage » singuliers.
Le militantisme féministe aujourd'hui
Authors: Bard Christine , Béranger Alix , Carbunar Clara , De Haas Caroline , Béja Alice
Published: October 2013

Ce que l’on appelle parfois le « nouveau » féminisme est en réalité bien ancré dans une tradition de lutte. Des organisations comme Osez le féminisme, La Barbe ou la Marche mondiale des femmes construisent des mobilisations, organisent le dialogue entre générations de féministes, interpellent l’État ou les syndicats, sans être pour autant homogènes dans leurs modes d’action comme dans leur diagnostic sur la société contemporaine et la manière dont elle traite les femmes.
À quoi servent les économistes ?
Authors: Aglietta Michel
Published: October 2013

L’économie devrait être une science de la société ; or aujourd’hui, elle est bien davantage une idéologie qui s’abrite derrière la prétendue objectivité des chiffres. Pour que l’économie et les économistes servent enfin à quelque chose, il faut que l’économie renoue avec les sciences sociales et sorte de la pure idée du marché pour se poser, par exemple, la question des inégalités.
Écrire pour devenir un spectateur amateur
Authors: Archat-Tatah Caroline
Published: October 2013

L’introduction des œuvres cinématographiques dans les enseignements scolaires s’inscrit dans une politique éducative qui vise la réduction des inégalités face aux savoirs et à la culture. Dans les faits, loin de résoudre ces inégalités, cette introduction comporte des enjeux de transformation que tous les élèves ne sont pas prêts à opérer. Une expérimentation réalisée dans un collège de la périphérie parisienne avec l’outil numérique d’annotation de film Lignes de temps sert de point d’appui pour comprendre les enjeux de la scolarisation du cinéma, pour cerner les apprentissages ainsi que les conditions de mise en œuvre qu’elle implique.
Innocence et séduction. Les aventures de la voix féminine dans La Religieuse de Diderot
Authors: Martin Christophe
Published: October 2013

Contrairement à une topique romanesque récurrente de la période, La Religieuse ne se borne pas à exposer l’innocence aux épreuves de la séduction. Non seulement, l’instrumentalisation de l’innocence et la mystification de la candeur sont au principe même de l’œuvre, avec la mystification du marquis de Croismare, mais le récit de Diderot se dédouble et semble offrir conjointement un roman de l’innocence et un roman de la séduction. Si La Religieuse est bien d’abord, à l’évidence, le roman de l’innocence persécutée et des épreuves de la vertu, les éléments invitant à mettre en doute la parfaite ingénuité de Suzanne sont réunis dans le récit même qu’elle compose. Par-delà la figure du narrataire, c’est en somme à un destinataire dédoublé que s’adresse Diderot, qui puisse simultanément compatir aux malheurs de Suzanne et suspecter son innocence, voire démasquer ses ruses, ses silences, ses ellipses, bref toutes ses stratégies de séduction.
Le Neveu de Rameau : un roman non romanesque ?
Authors: Albertan-Coppola Sylviane
Published: October 2013

Le Neveu de Rameau peut être aussi bien assimilé à une satire ou un dialogue philosophique qu’à un roman. Mais Diderot réagit en l’écrivant contre le romanesque en vogue à son époque ; il renonce au modèle richardsonien qui associait attendrissement et édification morale. Au « démon de la présence » cher à Roger Kempf s’est substitué, à partir du Neveu de Rameau , le démon de la critique, qui relie intrinsèquement roman et philosophie.
Une solide formation sceptique
Authors: Bourrit Bernard
Published: October 2013

Thomas Bernhard, nihiliste ? Voilà un séditieux prétexte pour nier, justement, la radicale rigueur de Thomas Bernhard. Pour refuser de considérer positivement l’esprit systématique avec lequel il relie le problème de l’écriture à celui de son origine. Écrire, c’est recommencer d’écrire, faire en sorte que l’écriture continue en dépit du fait – originel – que l’écrit trahit tout ce dont il s’empare : la pensée, la vérité, la réalité. Cette aporie, comment la dépasser ?
L'arabe à l'école, une langue mal-aimée
Authors: Messaoudi Alain
Published: October 2013

Alors que la France compte entre 3 et 4 millions d’arabophones, l’arabe est relativement peu enseigné en France. Comment l’expliquer ? Par une certaine réticence du corps enseignant, par le passé colonial français qui en a fait la langue des colonisés, par la crainte que son enseignement ne diffère l’intégration des élèves d’origine maghrébine ? Une crainte que ne suscite visiblement pas les autres langues.
Traduire les maux
Authors: Zortea Julia Burtin
Published: October 2013

À Marseille, depuis 1999, le centre de soins associatif Osiris accueille des exilé·e·s ayant subi des violences physiques et psychiques qui ont entraîné des traumatismes, afin d’en soulager les souffrances. L’activité de soin nécessite la présence d’interprètes spécialisé·e·s, co-intervenant avec les thérapeutes lors des consultations. Primordiale et délicate, leur position bouscule représentations et pratiques dans le champ médical. Entretien avec Julia Masson (coordinatrice et accueillante), Ledja Ismaili (interprète co-intervenante en albanais) et Gaëlle Bouquin-Sagot (psychologue et coordinatrice du pôle interprétariat d’Osiris).
Le comique troupier au XIX e siècle : une culture du rire
Authors: Roynette-Gland Odile
Published: October 2013

Au cours du XIX e siècle est née en France une production culturelle divertissante prenant pour sujet l’armée et ses représentants. Apparue au théâtre dès la Restauration, déployée ensuite dans la presse, notamment la presse satirique illustrée puis dans les circuits populaires de la littérature et sur les scènes des cafés-concerts, le comique troupier construit la place du militaire dans l’imaginaire social. Ces textes et ces images mettent en scène des types sociaux qui confortent les normes genrées et suscitent le rire selon des procédés rhétoriques répétitifs. Si leurs auteurs épinglent les travers d’une institution longtemps tenue éloignée de la nation, cette fonction critique tend néanmoins à s’étioler après la généralisation du service militaire en 1872. À la fin du XIX e siècle, cette production hybride répond aux attentes d’un public soucieux de se familiariser avec l’armée, non sans conserver aux yeux de l’institution militaire un pouvoir contestataire dont celle-ci ne peut négliger le rôle.
Posture et figure chez Barbey d'Aurevilly
Authors: Laroche Hugues
Published: October 2013

L’exemple de Barbey d’Aurevilly permet de souligner à quel point la posture d’un écrivain repose sur des figures. On entendra par ce dernier terme le jeu qui s’installe entre un projet littéraire et sa représentation et qui se déploie dans le style pris dans son extension la plus grande : figures de plume ou de costume, figures de personnages et de masques. Il semble que tous ces jeux de mode ou de mots tournent, à la façon du trope, autour d’une figure centrale qui serait celle du Christ : c’est par un travail d’imitation que l’écrivain catholique en vient à incarner cette figure qui fait de l’accusation d’imposture et de la Passion qui la suit une étape nécessaire à la résurrection.
La femme dans le roman zolien : idéologies du style
Authors: Bastin Fleur
Published: October 2013

Le discours masculin exerce sur le texte zolien une emprise aussi sûre que discrète, en particulier dans la définition du personnage féminin, et dans son assignation à un destin désigné comme normal. Le héros et le narrateur, fréquemment embusqué derrière lui, confondent souvent leurs voix autoritaires. Le brouillage des frontières du discours indirect libre et du discours auctorial contribuent ainsi à la fois à genrer la narration omnisciente et à valider les assertions des observateurs du féminin. Il s’agit dès lors de cerner l’héroïne de remises au point censées contrer un mystère féminin à la fois nécessaire au romanesque et inacceptable dans l’univers parfaitement transparent et lisible du roman naturaliste.
“Gay Paradise – kind of”. Les espaces de l’homosexualité masculine à Beyrouth.
Authors: Bonte Marie
Published: October 2013

A Beyrouth, les bars et les boîtes de nuits accueillant des publics homosexuels se multiplient et font partie du paysage nocturne, au point de devenir un argument touristique pour la ville. Les relations avec une personne de même sexe sont pourtant punies par la loi et fortement réprouvées par la société libanaise. A travers l’étude des lieux d’expression, de sociabilité ou de rencontre des homosexuels à Beyrouth, l’article interroge la constitution d’une identité gay libanaise et la formation d’un public homosexuel au sein de l’espace public urbain. Pour cela, le travail sur les espaces festifs et les lieux de drague homosexuels tente de penser les hybridations entre des pratiques et des normes locales et des logiques globales de circulation des identités sexuelles. En raison de la place assignée aux lieux de l’homosexualité à Beyrouth, entre accessibilité, dissimulation et enfermement, l’étude questionne également le rapport des homosexuels à l’espace et à leurs espaces, en termes de visibilité et d’invisibilité du stigmate.
Le galérien, le révolté et le yuppie : trois trajectoires d’immigrés égyptiens à Abu Dhabi
Authors: Gruntz Lucile
Published: October 2013

L’immigration de travail égyptienne aux Émirats arabes unis suscite en Égypte des espoirs collectifs et individuels de changement social sans cesse recomposés. Mais les émigrés devenus immigrés ne sont pas des passeurs de changement univoques : les expériences migratoires s’inscrivent dans des histoires longues ; elles se frottent à des dispositifs administratifs discriminatoires ; elles marquent diversement les esprits et les corps des immigrés et les espaces qu’ils fréquentent. C’est ce que retrace cet article, à travers les trajectoires singulières de trois hommes égyptiens à Abu Dhabi.