bluuebunny/crossref_metadata_2025 huggingface dataset:
Can Reverberation-measured Quasars Be Used for Cosmology?
Authors: Martínez-Aldama Mary Loli , Czerny Bożena , Kawka Damian , Karas Vladimir , Panda Swayamtrupta , Zajaček Michal , Życki Piotr T.
Published: October 2019

Quasars have been proposed as a new class of standard candles analogous to supernovae, since their large redshift range and high luminosities make them excellent candidates. The reverberation mapping (RM) method enables one to estimate the distance to the source from the time delay measurement of the emission lines with respect to the continuum, since the time delay depends on the absolute luminosity of the source. The radius–luminosity relation exhibits a low scatter and offers a potential use in cosmology. However, in recent years, the inclusion of new sources, particularly the super-Eddington accreting QSO, has increased the dispersion in the radius–luminosity relation, with many objects showing time delays shorter than the expected. Using 117 H
β reverberation-mapped active galactic nuclei with 0.002 < z < 0.9 and 41.5 < log L
5100 < 45.9, we find a correction for the time delay based on the dimensionless accretion rate (

) considering a virial factor anticorrelated with the FWHM of H
β. This correction decreases the scattering of the accretion parameters compared with the typical values used, which is directly reflected by suppressing the radius–luminosity relation dispersion. We also confirm the anticorrelation between the excess of variability and the accretion parameters. With this correction, we are able to build the Hubble diagram and estimate the cosmological constants Ω
m
and ΩΛ, which are consistent with the Λ Cold Dark Matter model at 2σ confidence level. Therefore, reverberation mapping results can be used to constrain cosmological models in the future.
The Solar Wind Electron Halo as Produced by Electron Beams Originating in the Lower Corona: Beam Density Dependence
Authors: Che H. , Goldstein M. L. , Salem C. S. , Viñas A. F.
Published: October 2019

It has been suggested that the isotropic electron halo observed in the solar wind electron velocity distribution function may originate from nanoflare-accelerated electron beams below 1.1 R
⊙ from the solar surface through the nonlinear electron two-stream instability (ETSI). This model unifies the origins of kinetic waves, the electron halo, and the coronal weak Type III bursts, and establishes a link between the solar wind observables and the electron dynamics in nanoflares. One of the important predictions of this model is that the halo-core temperature ratio is anticorrelated with the density ratio, and the minimum ratio is ∼4, a relic of the ETSI heating and has been found to be consistent with solar wind observations. However, how the density and relative drift of the electron beams determine the thermal properties of solar wind electrons is unclear. In this paper, using a set of particle-in-cell simulations and kinetic theory, we show that a necessary condition for an isotropic halo to develop is that the ratio of beam density n

b
and the background n
0 be lower than a critical value N

c
 ∼ 0.3. Heating of the core electrons becomes weaker with decreasing beam density, while the heating of halo electrons becomes stronger. As a result, the temperature ratio of the halo and core electrons increases with the decrease of the beam density, explaining the physical meaning of the predicted anticorrelated relation. We apply these results to the current observations and discuss the possible electron beam density produced in the nanoflares.
Multiple Stellar Populations of Globular Clusters from Homogeneous Ca–CN–CH Photometry. V.
as a Surrogate cnJWL Index and NGC 6723∗

†
Authors: Lee Jae-Woo
Published: October 2019

We introduce new color indices

(=Ca
CTIO − Ca
JWL) and ch
JWL [=(JWL43 − b) − (b − y)], accurate photometric measures of the CN band at λ3883 and the CH G band, respectively, in the study of the multiple populations (MPs) in globular clusters (GCs). Our photometric CN–CH relation for a large number of red-giant branch (RGB) in M5 shows that the evolutions of the CN and CH between the CN-w and CN-s populations are not continuous. Armed with our new color indices, we investigate the MPs of NGC 6723, finding the RGB populational number ratio of n(CN-w):n(CN-s) ≈ 35.5:64.5 (±2.8) with no radial gradient. Similar to other normal GCs with MPs, the helium abundance of the CN-s population inferred from the RGB bump magnitude is slightly enhanced by ΔY = 0.012 ± 0.012. Our cn
JWL and

color–magnitude diagrams clearly show the discrete double asymptotic giant branch (AGB) populations in NGC 6723, whose bright AGB populational number ratio is in marginal agreement with that of the RGB stars within the statistical errors. Finally, our synthetic cn
JWL index is in good agreement with observations, except for the CN-w AGB. Mitigation of the discrepancy in the CN-w AGB may require a mild nitrogen enhancement and/or a large decrement in the 12C/13C ratio with respect to the bright RGB.
ALMA Monitoring of Millimeter Line Variation in IRC +10216. I. Overview of Millimeter Variability
Authors: He J. H. , Kamiński T. , Mennickent R. E. , Shenavrin V. I. , Mardones Diego , Wang Wei , Tang Baitian , Schmidt M. R. , Szczerba R. , Ge Jixing.
Published: October 2019

Temporal variation of millimeter lines is a new direction of research for evolved stars. It has the potential to probe the dynamical wind-launching processes from a time dimension. We report here the first Atacama Large Millimeter Array (ALMA) results that cover 817 days of ongoing monitoring of 1.1 mm lines in the archetypal carbon star IRC +10216. The monitoring is done with the compact 7 m array and in infrared with a 1.25 m telescope in Crimea. High sensitivity of the cumulative spectra covering a total of ∼7.2 GHz between 250 and 270 GHz has allowed us to detect about 148 known transitions of 20 molecules, together with more of their isotopologues, and 81 unidentified lines. An overview of the variabilities of all detected line features is presented in spectral plots. Although a handful of lines are found to be very possibly stable in time, most other lines are varying either roughly in phase or in anticorrelation with the near-infrared light. Several lines have their variations in the ALMA data coincident with existing single-dish monitoring results, while several others do not, which requires a yet-unknown mechanism in the circumstellar envelope to explain.
Properties of Radial Velocities Measurement Based on LAMOST-II Medium-resolution Spectroscopic Observations
Authors: Wang R. , Luo A.-L. , Chen J.-J. , Bai Z.-R. , Chen L. , Chen X.-F. , Dong S.-B. , Du B. , Fu J.-N. , Han Z.-W. , Hou J.-L. , Hou Y.-H. , Hou W. , Jiang D.-K. , Kong X. , Li L.-F. , Liu C. , Liu J.-M. , Qin L. , Shi J.-R. , Tian H. , Wu H. , Wu C.-J. , Xie J.-W. , Zhang H.-T. , Zhang S. , Zhao G. , Zhao Y.-H. , Zhong J. , Zong W.-K. , Zuo F.
Published: October 2019

The radial velocity (RV) is a basic physical quantity that can be determined through the Doppler shift of the spectrum of a star. The precision of the RV measurement depends on the resolution of the spectrum we used and the accuracy of wavelength calibration. In this work, radial velocities of the Large Sky Area Multi-Object Fibre Spectroscopic Telescope-II (LAMOST-II) medium-resolution (R ∼ 7500) spectra are measured for 1,594,956 spectra (each spectrum has two wavebands) through matching with templates. A set of RV standard stars are used to recalibrate the zero point of the measurement, and some reference sets with RVs derived from medium-/high-resolution observations are used to evaluate the accuracy of the measurement. By comparing with reference sets, the accuracy of our measurement can get 0.0277 km s−1 with respect to radial velocities of standard stars. The intrinsic precision is estimated with the multiple observations of single stars, which can be achieved to 1.36 km s−1, 1.08 km s−1, and 0.91 km s−1 for the spectra at signal-to-noise levels of 10, 20, and 50, respectively.
Os números da licenciatura em matemática: políticas públicas em foco
Authors: Araujo Renato , Vianna Deise Miranda
Published: September 2019

A necessária ampliação da educação básica, realizada pela Lei nº 9.394 (BRASIL, 1996), levou o país a estatísticas preocupantes no que se refere à falta de professores. Nesse contexto, este trabalho pretende apresentar e discutir alguns dados sobre os cursos de Licenciatura em Matemática por meio do levantamento e da análise de documentos oficiais para a realização de uma pesquisa documental com abordagem quantitativa. As fontes de dados utilizadas foram as Sinopses Estatísticas do Ensino Superior, publicadas pelo Instituto Nacional de Estudos e Pesquisas Anísio Teixeira (INEP/MEC). Os dados serão apresentados por meio de gráficos e as análises farão uso de estatística descritiva. A análise de dados aponta que a política de ensino superior brasileira está apoiada na iniciativa privada, que o Sistema de Seleção Unificada pode ser o responsável pelo aumento dos candidatos nas instituições públicas e que o país triplicou o número de professores de matemática formados, uma vitória. Contudo, enquanto nos demais cursos de nível superior o país observa uma pequena ociosidade de vagas nas instituições públicas, nos cursos de licenciatura o mesmo não acontece. Também observou-se que as taxas de evasão no curso de Licenciatura em Matemática foram altas. Por último conclui-se que a dita ampliação dos cursos de formação de professores não ocorreu no caso da matemática, visto que seu crescimento sequer acompanhou a expansão do ensino superior brasileiro.
O café nosso de cada dia: investigação da influência de uma situação de estudo no processo de ensino aprendizagem de ciências da natureza no ensino médio
Authors: Jesus Danilo De , Guzzi Filho Neurivaldo José de
Published: September 2019

O café é uma das bebidas mais consumidas no mundo, por este fator, pode ser forte instrumento para ensino de Ciências de forma contextualizada, visto que o ensino tradicional não tem obtido grandes resultados com os estudantes da atualidade promovendo a falta de atenção e desestimulando os alunos que, na maioria dos casos, não conseguem perceber a relação entre os conteúdos estudados em sala de aula e sua vivência social. Diante disso, a Situação de Estudo (SE) aparece como uma importante promessa de evolução no campo de reformulação curricular, onde os conteúdos são trabalhados de forma coletiva e integrada. Nesse texto apresentamos relatos de uma pesquisa de mestrado, cujo objetivo foi investigar a eficiência de uma Situação de Estudo como proposta curricular para alguns assuntos de Química, Física, Biologia e História de forma contextualizada e interdisciplinar, baseando-se no tema café.
A crescente presença da epistemologia de Ludwik Fleck na pesquisa em educação em ciências no Brasil
Authors: Lorenzetti Leonir , Muenchen Cristiane , Slongo Iône Ines Pinsson
Published: September 2019

O estudo investigou a recepção da epistemologia de Ludwik Fleck pela pesquisa em Educação em Ciências no Brasil. Foram analisadas 89 dissertações e teses produzidas no período de 1995 a 2015, sendo que 37 trabalhos discutem a Educação em Ciências. Os dados apontam que na década de 1990 surgiram os primeiros estudos e que há uma concentração de trabalhos na Universidade Federal de Santa Catarina, especialmente na área da Educação em Ciências. Uma análise em profundidade, a partir de 6 eixos, foi realizada em 34 trabalhos que discutem a Educação em Ciências. O estudo identificou que o maior volume está concentrado nos eixos “formação de professores” e “emergência de um fato científico”. Destaca-se a significativa contribuição das categorias epistemológicas “estilo de pensamento”, “coletivo de pensamento” e “circulação intra e intercoletiva de ideias” no processo de produção do conhecimento.
Monitoria como estratégica pedagógica no ensino básico
Authors: Nyland Vitória , Marchi Miriam Ines , Oliveira Eniz Conceição , Flores Juliana , Del Pino José Claudio
Published: September 2019

O presente trabalho tem por objetivo apresentar percepções dos alunos monitores frente às atividades desenvolvidas em sua escola, durante a participação no projeto “Atividades de monitoria para o Ensino de Ciências no nível fundamental e médio”, ocorridas em duas escolas públicas do Vale do Taquari - RS. O estudo envolveu três alunos e uma professora de cada escola, que desenvolveram temas relacionados com experimentos de circuitos elétricos, termoquímica com enfoque na energia envolvida no consumo de alimentos, estudo sobre o lixo com confecção de lixeiras e estudo sobre o descarte do óleo de cozinha com confecção de sabão. A pesquisa foi qualitativa, utilizando-se como instrumento principal de coleta de dados uma entrevista realizada com os alunos monitores, a qual mostrou que aprovaram a proposta de monitoria e que, no decorrer das atividades, desenvolveram habilidades e competências que são importantes não só para a vida escolar como também para a profissional.
A incomunicabilidade entre história da ciência e conteúdo no ensino de química do ponto de vista da epistemologia de Bachelard
Authors: Wilezelek Soares de Melo Leonardo
Published: September 2019

Este estudo foi desenvolvido tendo por objetivo discutir sobre a demanda de comunicabilidade entre história da ciência e conteúdo existente na construção do currículo de Química, sob o olhar da epistemologia de Gaston Bachelard. De caráter metodológico descritivo, esta pesquisa inicia-se com uma discussão sobre a relação entre a filosofia de Bachelard e a história da ciência como ferramenta de contextualização histórica dos conhecimentos científicos construídos ao longo do tempo, assim como o que se espera com a utilização dessa última quando inserida em um contexto de ensino. A discussão tem seguimento com um debate sobre o que um estudante deve esperar do ensino de Química desse ponto de vista, utilizando como norte as ideias epistemológicas de Bachelard e ainda de outros autores. Dessa maneira, espera-se que este estudo amplie as discussões sobre possibilidades de utilização da história da Química dentro de contextos específicos de ensino de ciências.
Editorial
Authors: Souza Graziela Ferreira , Pinheiro Nilceia Aparecida Maciel
Published: September 2019

Editorial v.12, n.1.
Materialização de questões relacionadas a centro de massa: uma atividade aplicada a licenciandos
Authors: Fontes Adriana Da Silva , Ramos Fernanda Peres , Deimling Cesar Vanderlei
Published: September 2019

Apresenta-se, por meio desse artigo, uma pesquisa ação desenvolvida com licenciandos do curso de Química em uma Universidade Pública no interior do Paraná, na disciplina de Física 1. Buscou-se, com essa atividade, contribuir para minimizar a dificuldade dos acadêmicos na interpretação de exercícios do livro texto adotado, por meio da materialização de exercícios sobre o tema Centro de massa. Inicialmente o conteúdo foi introduzido de modo a identificar o conhecimento prévio. Na sequência trabalhou-se de forma expositiva-dialogada e ao final uma atividade experimental em grupo foi realizada entre os acadêmicos. Para avaliar o alcance das intenções iniciais, foi aplicado um questionário após a atividade experimental. Foi possível verificar o engajamento dos licenciandos nas aulas enquanto materializavam as questões e conseguiam resolver os exercícios. O interesse despertou-se com o uso de materiais simples, mostrando ser possível motivar e contribuir na formação de futuros professores.
A estrutura erigida para a relatividade de Einstein: o espaço-tempo de Minkowski
Authors: Pinheiro da Silva Jonas Diogo
Published: September 2019

A Teoria da Relatividade Restrita foi publicada pelo célebre Físico Albert Einstein no ano de 1905. Dez anos depois, Ainstein publicou uma nova teoria, relativística e generalizada que ficou conhecida como a Teoria da Relatividade Geral. Essa nova teoria foi fundamentada nos resultados dos estudos sobre espaço e tempo, feitos pelo célebre matemático Hermann Minkowski. O que se apresenta, nesse trabalho, é uma revisão bibliográfica de cunho qualitativo, com o objetivo de esclarecer a importância da contribuição de Hermann Minkowski à Relatividade de Einstein, bem como o sentido dado a Relatividade devido ao conceito de espaço-tempo inferido por Minkowski em seus estudos.
Estado e desenvolvimento econômico em Minas Gerais no período recente
Authors: Jorge Vieira Danilo
Published: September 2019

O texto tem como principal objetivo examinar as transformações ocorridas na concepção do papel atribuído ao Estado no processo de desenvolvimento de Minas Gerais a partir de meados da década de 1990 e a tentativa de constituição de um novo padrão de interação entre o aparato estatal e o mercado, distinto daquele que tinha prevalecido até então e cuja característica mais evidente e reconhecida tinha sido o protagonismo do governo estadual, tanto no planejamento quanto no estímulo ao crescimento e à modernização da economia mineira. A partir, sobretudo, do acompanhamento sistemático das diretrizes fixadas no Plano Mineiro de Desenvolvimento Integrado (PMDI), que se configura como principal instrumento de planejamento de médio e longo prazos do governo estadual, o trabalho analisa o período compreendido entre 1995 a 2014, buscando demonstrar que as reformas efetuadas não conseguiram proporcionar bases sustentáveis para a retomada da expansão da economia de Minas Gerais, que vivencia atualmente uma fase prolongada de baixo dinamismo e de retrocesso “primarizador” de sua estrutura industrial.
Qualidade do sono de cuidadores primários de crianças com microcefalia em uma unidade de saúde pública de Alagoas, Brasil
Authors: Lira Nycolas Emmanuel Tavares de , Silva Meire Helen Pereira Lyra da , Santos Ruana Camilla de Carvalho , Oliveira Wanderson Felipe Venceslau , Silva Victor Emmanuel Lopes da , Silva José Cláudio da
Published: September 2019

OBJECTIVE: To evaluate the sleep quality of primary caregivers of children with microcephaly that receive treatment in a public health facility.METHODS: This is a transversal, descriptive and quali-quantitative study. Ten informal primary caregivers of children with microcephaly from a public health facility in Alagoas were interviewed one-on-one for 20 minutes using the mini-sleep questionnaire (MSQ). MSQ scores were statistically analyzed to describe sleep disturbances (mean, median and standard deviation), and the relationship between the level of microcephaly and sleep quality was tested by Kruskal-Wallis non-parametric test.RESULTS: Results found herein shows the predominance of women as caregivers of children with microcephaly. Overall, the studied population showed a high prevalence of alteration in sleep quality, with 70% of sampled caregivers showing severe sleep disturbances (scores greater than 30). No relationship between the level of microcephaly and sleep disturbances were found (p>0.05).CONCLUSIONS: There is a high prevalence of sleep disturbances among primary caregivers of children with microcephaly in the studied facility. This pattern is of great concern as such disorders may negatively affect not only the caregivers’ life quality, but also the quality of provided care.
Ensino de informática na formação técnica: uma experiência interdisciplinar
Authors: Santos Sylvana Karla da Silva de Lemos
Published: September 2019

O ensino técnico profissionalizante permite que a aprendizagem em sala de aula possa relacionar a área de formação e o mercado de trabalho. Tal fato motivou a realização de uma atividade interdisciplinar com foco na elaboração do design de uma embalagem de alimento. O público do projeto foram os estudantes de uma turma do curso técnico integrado ao ensino médio em alimentos, no Instituto Federal de Brasília, Campus Gama, localizado no Distrito Federal. O projeto teve caráter descritivo com abordagem qualitativa, cujo objetivo foi utilizar ferramentas computacionais para associar conhecimentos de disciplinas das áreas básica e específica do curso, além de fomentar a criatividade. Cada estudante apresentou sua produção para os demais colegas da turma e para os professores do curso. Os resultados demonstraram que foi possível relacionar os conhecimentos das diferentes disciplinas envolvidas e promover a criatividade artística dos estudantes.
A segurança energética no estado de Minas Gerais em seus aspectos climáticos e sociais
Authors: Melo Leonardo Barrouin , Costa Antonella Lombardi , Fortini Ângela
Published: September 2019

Qual será a demanda energética e quais serão as fontes de energia para atendimento dos setores econômicos do estado de Minas Gerais (MG), quando a população do estado atingir seu maior contingente? É crucial a necessidade de previsibilidade e confiabilidade para o suprimento energético de um sistema econômico, o que pode ser traduzido por Segurança Energética. Este trabalho tem o objetivo de apresentar a estrutura energética do estado de MG, o produto interno bruto, a população, os setores energéticos e realizar projeções de crescimento destes parâmetros, bem como estimar o crescimento da demanda de energia, tendo como foco a Segurança Energética. As mudanças climáticas poderão introduzir elementos desfavoráveis para a Segurança Energética e também causar impactos sociais relevantes. O propósito do estudo é descritivo com abordagem metodológica quantitativa, utilizando ferramentas simples para os cálculos de parâmetros e projeções. O estudo mostrou que, mesmo no curso de um cenário de baixo crescimento econômico, a demanda energética do estado crescerá e atenção especial será necessária para a fonte hidráulica. A contribuição deste artigo reside na obtenção da ordem de grandeza dos parâmetros investigados.
Análise da energia nuclear no âmbito do despacho termoelétrico e da sustentabilidade: um panorama da termoeletricidade nuclear e a inserção de Angra 3 no sistema interligado nacional
Authors: Otobe Junior Reinaldo Fugitaro , Moreira João Manoel Losada , Gonçalves Letícia Caroline , Pinto Roberto Tadeu Soares , Asano Patrícia Teixeira Leite
Published: September 2019

Este trabalho discute a contribuição da energia nuclear para a complementação térmica do Sistema Interligado Nacional, as questões relacionadas com a usina Angra 3 em construção e analisa sua contribuição para a sustentabilidade do sistema elétrico. Neste trabalho avalia-se o valor estratégico da segurança energética provido pelas fontes termoelétricas e, em particular, pela alternativa nuclear. A análise de custo é baseada no custo marginal de operação. A análise de sustentabilidade considera 6 critérios: emissão de gases do efeito estufa, área imobilizada, consumo de matéria prima na forma de combustível, consumo de água, morbidade e fatalidades em acidentes. Esses critérios são considerados importantes pelos setores de energia, industrial e pela sociedade. Conclui-se que a energia nuclear na função de complementação térmica garante segurança energética, confiabilidade no fornecimento de energia, menor custo marginal e operação e maior contribuição para sustentabilidade.
What are the responsible risk factors for delay in diagnosis of acute appendicitis in children? Eleven-year research from a single institution
Authors: Kambouri Katerina , Aggelidou Maria , Deftereos Savvas , Tsalkidis Aggelos , Vaos George , Pitiakoudis Michail
Published: September 2019

Introduction: We conducted a retrospective analysis of 602 children operated on for acute appendicitis (AA) in our department between 1/2007 and 12/2017.

Aim: The aim of this study was to identify factors that are related to a delay in diagnosing AA in children. Furthermore, we’d like to strengthen our previous preliminary results by a) adding gender as a new factor and b) studying a much larger population.

Materials and methods: The time that elapsed from the onset of symptoms to the surgical intervention was associated with gender, age, obesity, use of antibiotics prior to diagnosis, and the initial examination by a paediatric surgeon or another physician. Univariate and multivariate logistic regression method (backward method) was applied.

Results: The diagnosis of AA was delayed by at least 48 hours in 287 patients (group A, 47.7%) and was made within 48 hours in 315 patients (group B, 52.3%). In multivariate model we noticed that boys who were examined by a paediatric surgeon and didn’t take antibiotics had decreased odds of having length of diagnostic period >48 hours, girls who received antibiotics compared to girls who do not use antibiotics are almost 12 times more likely to have length of diagnostic period >48 hours, the very young age has а main effect оn the diagnostic delay and girls who have been examined by other physician compared to females who have been examined by paediatric surgeon have decreased odds of having length of diagnostic period >48 hours.

Conclusions: Therefore, physicians examining children with abdominal pain must keep in mind the multiple causes of diagnostic delay that may exist alone or in combination, and which can lead to serious complications and lengthen the hospital stay. Performing repeated examinations and asking for advice from a specialist specifically for children who are a special category of patients, in areas where it is rather impossible to use imaging techniques, could be the key to correctly diagnosing and treating AA.
New morphological and DNA evidence supports the existence of Calligonum jeminaicum Z. M. Mao (Calligoneae, Polygonaceae) in China
Authors: Shi Wei , Liu Pei-Liang , Wen Jun , Feng Ying , Pan Borong
Published: September 2019

Calligonum jeminaicumZ. M. Mao, a species regarded as endemic to China, was thought to be nonexistent owing to a lack of scientific records. The similarity ofC. jeminaicumtoC. mongolicumTurcz. warranted an investigation into the taxonomical relationship between these species. In this study, a naturally occurring population ofC. jeminaicumwas discovered and the taxonomical relationships of this species withC. mongolicumwere resolved. Morphological traits, including fruit and flower characteristics, as well as nuclear (ETS, ITS) and chloroplast (psbA-trnH,ycf6-psbM,rpl32-trnL,rbcL, andtrnL-F) DNA sequence data were studied to confirm the taxonomic status ofC. jeminaicum. The nrDNA data (ITS1-2 and ETS) fromC. jeminaicumreflected variability from the wholeC. mongolicumcomplex, showing distinctive haplotypes in the Calligonum sect. Medusa Sosk. & Alexandr. The cpDNA data supplied similar evidence, showing unique branching in Bayesian and ML tree analyses. The specific status ofC. jeminaicumis confirmed based on both morphological and molecular analyses. Here we present a revised description ofC. jeminaicumalong with its DNA barcode and discuss suggestions for the conservation of this species. Based on current evidence, this species was evaluated as Critically Endangered (CR) according to the IUCN criteria.
A new genus of air-breathing marine slugs from South-East Asia (Gastropoda, Pulmonata, Onchidiidae)
Authors: Dayrat Benoît , Goulding Tricia C. , Khalil Munawar , Comendador Joseph , Ngô Xuân Quảng , Tan Siong Kiat , Tan Shau Hwai
Published: October 2019

As part of an ongoing effort to revise the taxonomy of air-breathing, marine, onchidiid slugs, a new genus, Laspionchis Dayrat & Goulding, gen. nov., is described from the mangroves of South-East Asia. It includes two new species, Laspionchis boucheti Dayrat & Goulding, sp. nov., and Laspionchis bourkei Dayrat & Goulding, sp. nov., both distributed from the Malacca Strait to the Philippines and Australia. This study is based on extensive field work in South-East Asia, comparative anatomy, and both mitochondrial (COI and 16S) and nuclear (ITS2 and 28S) DNA sequences. The two new species are found in the same habitat (mud surface in mangrove forests) and are externally cryptic but are distinct anatomically. Both species are also strongly supported by DNA sequences. Three cryptic, least-inclusive, reciprocally-monophyletic units within Laspionchis bourkei are regarded as subspecies: L. bourkei bourkei Dayrat & Goulding, ssp. nov., L. bourkei lateriensis Dayrat & Goulding, ssp. nov., and L. bourkei matangensis Dayrat & Goulding, ssp. nov. The present contribution shows again that species delineation is greatly enhanced by considering comparative anatomy and nuclear DNA sequences in addition to mitochondrial DNA sequences, and that thorough taxonomic revisions are the best and most efficient path to accurate biodiversity knowledge.
Black soldier fly (Hermetia illucens L.): effect on the fat integrity using different approaches to the killing of the prepupae
Authors: Montevecchi G. , Zanasi L. , Masino F. , Maistrello L. , Antonelli A.
Published: October 2019

The increase of waste, due to the rise of the world population, renders the use of the black soldier fly (BSF;Hermetia illucens) as agri-food leftover biotransformer very attractive. Indeed, feeding on these substrates, BSF is capable of transforming them into valuable fat, proteins, and chitin. The present study is aimed at evaluating different approaches to the killing of the prepupae in order to assess which is associated with the lowest production of artefacts, notably free fatty acids. Folch extraction method, via an Ultra-Turrax homogeniser, was selected to isolate and analyse prepupal fat. The same method was also applied for a direct grinding method to kill black soldier fly prepupae. The integrity of fat originated from this direct grinding approach to the killing was compared in terms of fatty acid profile with the samples obtained with two other killing procedures, i.e. freezing and blanching. Direct grinding proved to be a better preservative of fat integrity in terms of lowest amount of free fatty acids (about 2.5%) in comparison with freezing (about 15%), but also with blanching (about 10%). Furthermore, the direct grinding is a killing strategy that reduces energetic demand and process time and helps lower analytical costs.
Current PCR-based methods for the detection of mycotoxigenic fungi in complex food and feed matrices
Authors: Rahman H. Ur , Yue X. , Yu Q. , Zhang W. , Zhang Q. , Li P.
Published: September 2019

Mycotoxins are toxic secondary fungal metabolites produced by certain types of filamentous fungi, such asAspergillus, Fusarium, andPenicillium spp. Mycotoxigenic fungi and their produced mycotoxins are considered to be an important issue in food and feed safety due to their toxic effects like carcinogenicity, immunosuppression, neurotoxicity, nephrotoxicity, and hepatotoxicity on humans and animals. To boost the safety level of food and feedstuff, detection and identification of toxins are essential at critical control points across food and feed chains. Zero-tolerance policies by the European Union and other organizations about the extreme low level of tolerance of mycotoxins contamination in food and feed matrices have led to an increasing interest to design more sensitive, specific, rapid, cost-effective, and safer to use mycotoxigenic fungi detection technologies. Hence, many mycotoxigenic fungi detection technologies have been applied to measure and control toxins contamination in food and feed substrates. PCR-based mycotoxigenic fungi detection technologies, such as conventional PCR, real-time PCR, nested PCR, reverse transcriptase (RT)-PCR, loop-mediated isothermal amplification (LAMP),in situ PCR, polymerase chain reaction-denaturing gradient gel electrophoresis (PCR DGGE), co-operational PCR, multiplex PCR, DNA arrays, magnetic capture-hybridization (MCH)-PCR and restriction fragment length polymorphism (RFLP), would contribute to our understanding about different mycotoxigenic fungi detection approaches and will enhance our capability about mycotoxigenic fungi identification, isolation and characterization at critical control points across food and feed chains. We have assessed the principles, results, the limit of detection, and application of these PCR-based detection technologies to alleviate mycotoxins contamination problem in complex food and feed substrates. The potential application of these detection technologies can reduce mycotoxins in complex food and feed matrices.
Do Help-Seeking Behaviors Influence the Recovery of People With Mental Illness?
Authors: Patterson Christopher , Perlman Dana , Moxham Lorna , Burns Shawn
Published: September 2019

Personal recovery is a primary focus for health care professionals and people with mental illness, with current research focused on understanding the concepts and factors that facilitate a positive recovery journey. A person's ability to seek help is an area that has demonstrated promise. Although there is a wealth of literature that exists on the barriers to someone seeking help, there is little empirical evidence to demonstrate the connection between help-seeking behaviors and personal recovery for people with mental illness. The current study used quantitative measures to examine whether help-seeking behaviors would facilitate personal recovery. One hundred twenty people with mental illness completed two valid and reliable surveys that measured help-seeking behaviors and personal recovery. Using multiple linear regression analysis, results revealed that help-seeking behaviors significantly influenced the personal recovery of participants. Understanding the constructs that facilitate a positive personal recovery journey for a person with mental illness may be viewed as a critical area of inquiry. These results allow for future inquiry into the connection between intention and behavior, as there has been an identified disparity between the need for assistance and use of services. [
Journal of Psychosocial Nursing and Mental Health Services, 57
(12), 33–38.]
Surgical Technique for Transscleral Fixation of a Foldable Posterior Chamber Intraocular Lens
Authors: Yepez Juan B. , Cedeno de Yepez Jazmin , Valero Alejandro , Arevalo J. Fernando
Published: October 2019

The safety and efficacy of a modified technique for transscleral fixation of a foldable posterior chamber intraocular lens (IOL) for intracapsular aphakia (secondary IOL) or after complicated phacoemulsification was evaluated. All eyes had inadequate or no posterior capsular support. Follow-up was between 4 and 26 months (mean, 12 months). Uncorrected visual acuity improved (> 2 lines) in all patients. During follow-up, the IOL was correctly positioned in all cases. There were no major complications, such as endophthalmitis or suture erosion through the conjunctiva at the site of fixation. No patient required further surgical interventions. This modified technique of transscleral fixation of foldable posterior chamber IOL offers the advantages of a small incision and rapid visual rehabilitation, and minimizes the risk of intraoperative and postoperative complications. [Ophthalmic Surg Lasers Imaging 2006;37:247-250.] AUTHORS From the Retina and Vitreous Service (JBY, JCY, AV), Clinica de Ojos de Maracaibo, Maracaibo; and the Retina and Vitreous Service (JFA), Clinica Oftalmologica Centro Caracas, Caracas, Venezuela. Accepted for publication December 7, 2005. Presented in part at the 19th Annual Meeting of the Vitreous Society, Fajardo, Puerto Rico, November 26-December 1, 2001. Supported in part by the Fundacion Arevalo-Coutinho para la Investigacion en Oftalmologia, Caracas, Venezuela. Address reprint requests to J. Fernando Arevalo, MD, FACS, Clinica Oftalmologica Centro Caracas, Centro Caracas PH-1, Av. Panteon, San Bernardino, Caracas 1010, Venezuela.
Transpupillary Thermotherapy With Indocyanine Green Dye Enhancement for the Treatment of Occult Subfoveal Choroidal Neovascularization in Age-Related Macular Degeneration
Authors: Kim Judy E. , Shah Kekul B. , Han Dennis P. , Connor Thomas B.
Published: October 2019

BACKGROUND AND OBJECTIVES
Transpupillary thermotherapy (TTT) with indocyanine green (ICG) dye enhancement (TTT+) and TTT alone were compared for safety and effectiveness as a treatment of occult subfoveal choroidal neovascularization in age-related macular degeneration.
PATIENTS AND METHODS
Twenty-one patients were randomized to receive TTT (12 eyes) or TTT+ (9 eyes) and observed for at least 6 months.ETDRS visual acuity and fluorescein and ICG angiography were obtained every 3 months.
RESULTSThe median initial visual acuity was 20/80 in the TTT group and 20/100 in the TTT+ group. At 6 months, loss of less than 3 lines of visual acuity was present in 7 of 12 eyes (58%) in the TTT group and 5 of 9 eyes (56%) in the TTT+ group. At the final examination, there was no active choroidal neovascularization exudation in 6 of 12 eyes (50%) in the TTT group and 5 of 9 eyes (56%) in the TTT+ group. The median final visual acuity was 20/125 in the TTT group and 20/160 in the TTT+ group. Ocular or systemic complications were not encountered in either group.
CONCLUSION
TTT with ICG dye enhancement was as safe and effective as TTT alone in this study. However, modifications of treatment protocol would be needed to see whether there is any advantage to using ICG dye enhancement.
[Ophthalmic Surg Lasers Imaging 2006;37:272-277.]
AUTHORS
From The Eye Institute, Medical College of Wisconsin, Milwaukee, Wisconsin.
Accepted for publication February 19, 2005.
Supported in part by an unrestricted grant from Research to Prevent Blindness, Inc., New York, New York.
Address reprint requests to Judy E. Kim, MD, The Eye Institute, Medical College of Wisconsin, 925 N. 87th Street, Milwaukee, WI 53226.
Delayed Posttraumatic Propionibacterium acnes Endophthalmitis in a Child
Authors: Huynh Tony H. , Johnson Mark W.
Published: October 2019

A 7-year-old boy presented with granulomatous anterior uveitis after an unrecognized penetrating injury in the same eye 2 months previously. The uveitis was unresponsive to topical corticosteroid therapy, lensectomy with anterior vitrectomy, and administration of intraocular and subconjunctival injections of vancomycin. Pars plana vitrectomy, capsulectomy, and injection of intravitreal vancomycin were eventually performed, leading to complete resolution of the intraocular inflammation. Culture and histopathologic examination of a capsular specimen confirmed sequestered Propionibacterium acnes infection. This case demonstrates that P. acnes may cause delayed endophthalmitis following penetrating trauma and may persist within capsular remnants in the aphakic eye. [Ophthalmic Surg Lasers Imaging 2006;37:314-316.] AUTHORS From the W. K. Kellogg Eye Center, Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, Michigan. Accepted for publication February 20, 2006. Address reprint requests to Mark W. Johnson, MD, W. K. Kellogg Eye Center, 1000 Wall Street, Ann Arbor, MI 48105.
Tablas de nuevos maestros castellanos anteriormente atribuidas al maestro de Palanquinos (h. 1480-1500)
Authors: Ballesté Escorihuela Marc
Published: September 2019

El Maestro de Palanquinos es un pintor anónimo del área de León de finales del siglo XV a quien se le han atribuido numerosas tablas y conjuntos. Con un estilo hispano-flamenco y trazo particular, gozó de cierta importancia en ámbito diocesano. No obstante, no todo aquello que se le ha asignado parece haber sido ejecutado en su obrador. El presente artículo revisa el catálogo del pintor e identifica nuevas personalidades artísticas de su entorno o cronología.
Una obra inédita del pintor puertorriqueño Francisco Oller: aneurisma de la aorta, 1867-1871
Authors: Rigau Pérez José G.
Published: September 2019

Se presenta el diagrama a color de un aneurisma de la aorta, obra inédita del pintor puertorriqueño Francisco Oller. La obra ilustra un informe clínico manuscrito que el médico francés Henri Dumont redactó entre 1867 y 1871 en Puerto Rico y envió a la Real Academia de Medicina de Madrid. Ambos autores, el pintor entrenado en Madrid y París y el médico investigador en áreas tropicales, fundan su obra en el estudio de condiciones locales, en diálogo con redes internacionales de su profesión.
Fernando García Mercadal. Clásico y vernáculo: reflexiones sobre el lenguaje arquitectónico
Authors: Layuno Ángeles
Published: September 2019

La trayectoria poliédrica de Fernando García Mercadal permite reflexionar sobre la premisa de la a-historicidad del lenguaje racionalista moderno, partiendo de la confluencia en su obra de múltiples matices al margen o fusionados con la vanguardia. Desde los años de su formación como pensionado en Roma, Mercadal elabora una híbrida articulación de su lenguaje arquitectónico, vinculando las formas de la modernidad a sus estudios sobre el clasicismo y el vernáculo mediterráneo. A partir de esta premisa, el análisis de su producción escrita, construida o proyectada trata de desvelar los ingredientes clásico-vernáculos en su obra, y, a su vez, el grado de coherencia entre su pensamiento y su lenguaje arquitectónico.
Ceremonias del consenso y la contracultura: Antoni Miralda o la inversión carnavalesca
Authors: Estella Noriega Iñaki
Published: September 2019

El arte de acción ha tenido desigual fortuna en España, tanto en lo que se refiere a la práctica artística como a su estudio por parte de la historia del arte. Entendido como expresión liberadora y progresista por la crítica coetánea, y, por tanto, ajeno a los parámetros culturales de la dictadura, en este artículo proponemos volver al archivo para problematizar dicha comprensión y valoración crítica de los modos de interpretación y aceptación. Nuestro estudio se centra en el happening y su desarrollo en la década de los sesenta y setenta del siglo XX en España a través de la relevancia de algunos eventos que no han pasado al archivo (la importancia de Granollers, la participación de Dalí, p.e.), centrándonos en las acciones de Antoni Miralda donde se desvelan culturas de consenso y arraigo que cuestionan las interpretaciones historiográficas dadas.
Learning and Developing With Each Other
Authors: Gupta Rajan , Pal Saibal Kumar
Published: October 2019

ICT is a powerful tool which can be used by both India and Canada to harness the growth and development in the respective regions. Researchers and practitioners can come together from Indo-Canadian communities and take the association to a more meaningful level. The current research discusses the ICT tools that can be adopted from Canada by India to improve the education quality and knowledge transmission. On the other hand, Canada government can make efforts to enhance knowledge transfer and translation through ICT by adopting tools like best practices repository, communities of practice, corporate intranet/extranet, corporate yellow pages, expertise locator, online chat/instant messaging, knowledge portals, groupware-workflow and tracking system, and document/content management that are already used in India. ICT has the potential to develop the country politically, socially, and economically.
Customer Analytics Capabilities in the Big Data Spectrum
Authors: Hossain Md Afnan , Akter Shahriar , Yanamandram Venkata
Published: October 2019

Customer analytics plays a vital role in generating insights from big data to improve service innovation, product development, personalization, and managerial decision-making; yet, no academic study has investigated customer analytics capability through which it is possible to achieve sustainable business growth. To close this gap, this chapter explores the constructs of the customer analytics capability by drawing on a systematic review of the literature in the big data spectrum. The chapter's interpretive framework portrays a definitional aspect of customer analytics, the importance of customer analytics, and customer analytics capability constructs. The study proposes a customer analytics capability model, which consists of four principal constructs and some important sub-constructs. The chapter briefly discusses the challenges and future research direction for developing the customer analytics capability model in the data rich competitive business environment.
Information Technology Study Cases
Authors: Durrani Rabia Imtiaz , Durrani Zainab
Published: October 2019

This chapter focuses on the use of project management tools, techniques, and software in projects. The chapter includes a detailed discussion on the use of information communication technology within projects and provides a tour of the software and project management methodologies used to deploy projects. To contextualize the discussion, a case study of four startup projects hosted by two different incubation centers is presented. The case study discussion is structured around four themes: financial aspects, family support, legal perspective, and project success and failure. Findings from the cases are then compared against the literature reviewed; finally, the chapter concludes by providing recommendations. However, the result divulges there is no proper mechanism that encompasses the use of project management software.
Internet Technology Application in Production of Internet Radio Programs in Vietnam
Authors: Thi Kien Truong
Published: October 2019

This chapter introduces the concept and features of Internet radio, and expresses the status of Internet technology application in the production of Internet radio programs in Vietnam. Some solutions are proposed to help Vietnamese radio managers to improve the efficiency of Internet technology application in producing the programs.
Clustering for Innovative Business Model Design for Products and Services
Authors: López Pérez Jesús-Fabian , De la Mora Ana Elena , Reyes Rosalba Trevino
Published: October 2019

Acceleration of technology evolution, customers' requests of agility in operations and rapid product development requires the supply chains to become more active and connected to attend clients and new markets. The chapter content is structured on three business use cases. The first section is related to the aerospace industry. The purpose is to identify the influence of quality and quantity of the supplier base in the innovation activities of aerospace companies participating in a cluster. Authors applied a framework based on factor analysis and multivariate linear regression to measure the impact of the quality and quantity of a set of suppliers. The second section is related to operation of Micro Finance institutions (MFIs). Authors design and propose a full-featured optimization framework based on a mixed integer programming model. They discuss the impact of the risk balancing and merits of the proposed model.
Managing Risk in Global Food Supply Chains
Authors: Miranda-Ackerman Marco A. , Colin-Chávez Citlali , Espitia-Moreno Irma Cristina , Ruiz-Morales Betzabé , Arredondo-Soto Karina Cecilia
Published: October 2019

Supply chains have inherent risk given the number of actors that interface. While there are some chains that have low frequencies of unfavorable events, many continuously face uncertainty. Food production has many uncertainties along the global supply chain. The global nature of the large logistical networks increases its complexity. Two main sources of uncertainty arise: External and internal to the SC. External factors mainly come from nature (such as “El Niño” phenomenon) and from human activities (such as food and nutrition policy and standards). Internal factors mainly come from operations such as a cold chain disruption. Thus, one needs to minimize risk and improve resilience in order to achieve food security and sustainability. It is then imperative that risk management practices be integrated into the supply chain design and management process. This chapter presents an overview of the main risks involved in global food supply chains, as well as some techniques for risk management.