4,425 research outputs found
RESEARCH ETHICS
No full textList of tables -- List of contributors -- Acknowledgments -- Ch. 1. Human subjects research: ethics and compliance / Ana Smith Iltis -- Ch. 2. Ethics of vaccine research / Christine Grady -- Ch. 3. Ethical issues in the conduct of genetic research / Lisa S. Parker and Lauren Matukaitis Broyles -- Ch. 4. Embryonic stem cell research and human therapeutic cloning: maintaining the ethical tension between respect and research / Gerard Magill -- Ch. 5. Conducting and terminating randomized controlled trials / Ana Smith Iltis -- Ch. 6. Ethics in behavioral and social science research / James M. Dubois -- Ch. 7. When should research with infants, children, or adolescents be permitted? / Loretta M. Kopelman -- Ch. 8. Biomedical research in the developing world: ethical issues and dilemmas / David B. Resnik -- Ch. 9. Financial conflicts of interest and the human passion to innovate / Mark J. Cherry -- Ch. 10. Interpreting scientific data ethically: a frontier for research ethics / Griffin Trotter -- Inde
Differential stability of 2'F-ANA*RNA and ANA*RNA hybrid duplexes: roles of structure, pseudohydrogen bonding, hydration, ion uptake and flexibility
No full text14 pags., 7 figs., 3 tabs.Hybrids of RNA with arabinonucleic acids 2′F-ANA and ANA have very similar structures but strikingly different thermal stabilities. We now present a thorough study combining NMR and other biophysical methods together with state-of-the-art theoretical calculations on a fully modified 10-mer hybrid duplex. Comparison between the solution structure of 2′F-ANA•RNA and ANA•RNA hybrids indicates that the increased binding affinity of 2′F-ANA is related to several subtle differences, most importantly a favorable pseudohydrogen bond (2′F-purine H8) which contrasts with unfavorable 2′-OH-nucleobase steric interactions in the case of ANA. While both 2′F-ANA and ANA strands maintained conformations in the southern/eastern sugar pucker range, the 2′F-ANA strand's structure was more compatible with the A-like structure of a hybrid duplex. No dramatic differences are found in terms of relative hydration for the two hybrids, but the ANA•RNA duplex showed lower uptake of counterions than its 2′F-ANA•RNA counterpart. Finally, while the two hybrid duplexes are of similar rigidities, 2′F-ANA single strands may be more suitably preorganized for duplex formation. Thus the dramatically increased stability of 2′F-ANA•RNA and ANA•RNA duplexes is caused by differencesin at least four areas, of which structure and pseudohydrogen bonding are the most important. © The Author(s) 2010. Published by Oxford University Press.Spanish Ministerio de Ciencia e Innovacion (grants
CTQ2007-68014-C02-02 to CG and BIO2009-10964 to
MO); Fundacion Marcelino Botin (grant to MO);
Canadian Institutes for Health Research (grant to
M.J.D.); Natural Sciences and Engineering Research
Council of Canada (postgraduate scholarship to
J.K.W.). Funding for open access charge: Canadian
Institutes for Health Research
Scientometric Portrait of Nobel Laureate S. Chandrasekhar
No full textScientometric analysis of the publications productivity of Nobel Laureate S. Chandrasekhar is documented
Viajantes ex-cêntricas nas histórias de Ana Miranda
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão. Programa de Pós-Graduação em Literatura.No conjunto das narrativas ficcionais da escritora brasileira Ana Miranda, a temática da viagem # considerada uma das mais férteis da literatura ocidental de todos os tempos # ocupa um espaço de centralidade, podendo até mesmo ser vista como o mais importante eixo de estruturação de suas obras. O estudo realizado pela presente tese tem por objetivo analisar o tratamento dado ao tema da viagem nos romances Desmundo, O retrato do rei, Dias & Dias e Amrik, evidenciando que por intermédio das narradora-viajantes # Oribela, Mariana, Feliciana e Amina # a autora promove um diálogo entre diferentes culturas, gêneros, etnias e gerações, ao mesmo tempo em que estabelece um profícuo diálogo com o passado em sua invariante problematização concernente aos limites e cruzamentos entre o discurso ficcional e os discursos narrativos extraliterários que o cercam, sobretudo o histórico e o biográfico. In the whole of Brazilian writer Ana Miranda#s fictional narrative, the travel thematic # considered one of the most fertile themes of the western literature of all times # occupies a central space, and can even been seen as the most important structuring axis of Miranda#s works. The aim of the present thesis is to analyze the treatment given to the travel subject in the novels Desmundo, O retrato do rei, Dias & Dias and Amrik, emphasizing that, through the traveling narrators, Oribela, Mariana, Feliciana and Amina, the author promotes a connection between different cultures, genders, ethnics and generations, at the same time that establishes a profitable dialogue with the past in her invariant problematization concerning the limits and crossings between the fictional and the extra-literary narrative discourses that surrounds it, mainly the historical and the biographic ones
The Literary Legacy of Ana Plácido: Autobiographical Matrix and Meaning-Seeking
No full textDissertação de Mestrado em Literatura de Língua Portuguesa apresentada à Faculdade de LetrasThe present survey is an analysis of the literary legacy of Ana Plácido – Luz coada por ferros and Herança de lágrimas – exploring the genealogical similarities between these and two other works of European literature: Burned Alive and A Psychologist Experiences the Concentration Camp by Souad and Viktor Frankl respectively. It is proposed that the meaning-seeking conception developed by the psychiatrist Viktor Frankl can be a useful conceptual tool to understand the autobiographical creative process informing several existential and literary aspects of Ana Plácido’s work.Our observation of several affinities led to the creation of an autobiographical creative model related to Viktor Frankl’s meaning-seeking concept developed in the context of logotherapy. The application of this model to the work of Ana Plácido proved to be crucial to the analysis of its existential and literary aspects. In fact, we have found significant confluences between the 19th century Portuguese author and the already-mentioned work by Souad (21st century) and Frankl (20th century), pointing indisputably to the use of writing and its diffusion as a form of overcoming limit situations, which is also a form of social activism. In addition to applying the creative model in question, a literary meditation was carried out adapted to the peculiarities of Plácido’s work which is absent – or almost so – from the canons of the published and studied Portuguese authors. We started from the already mentioned genealogical concept applied to Ana Plácido´s historical and sociocultural context, whilst looking at the network of literary associations with previous authors such as Madame de Staël, George Sand, Marquise of Alorna, and Catarina de Balsemão, and current ones such as Camilo Castelo Branco. From these, we sought tools that allowed us to unlock autobiographical codes which are invaluable in this type of textual analysis. As for the literary analysis of the works, we tried to be as comprehensive as possible. This survey is generally informed by semiotic, structuralist, and stylistic approaches, including rhetoric, along with reception theory. We tried in this way to highlight not only the documentary value of her work (particularly regarding the female condition in the 19th century), and to emphasise the singularity of her writing in its individual, social, and literary aspects.A presente investigação pretende fazer uma incursão pelo legado literário de Ana Plácido – Luz coada por ferros e Herança de lágrimas – a partir das semelhanças genológicas entre estas e outras duas obras da literatura europeia: Queimada viva e Um psicólogo no campo de concentração, de Souad e Viktor Frankl respetivamente. As afinidades que observámos levaram-nos à elaboração de um modelo operatório de cariz autobiográfico relacionado com o conceito de construção de sentido, desenvolvido no âmbito da logoterapia, pelo psiquiatra Viktor Frankl. A sua aplicação na obra de Ana Plácido revelou-se fulcral nos vários aspetos vivenciais e literários analisados. De facto, há confluências significativas entre a autora portuguesa do século XIX e as obras mencionadas de Souad (século XXI) e Frankl (século XX), que apontam iniludivelmente para um uso da escrita e da sua difusão como forma de ultrapassagem de uma situação limite, que é também uma forma de intervenção social.A par da testagem do modelo operatório em causa, é efetuada uma mediação literária adaptada às peculiaridades da obra de Ana Plácido, ausente, ou quase, do cânone dos escritores portugueses divulgados e estudados. Partimos do conceito genológico atrás identificado, inserindo no contexto histórico e sociocultural de Ana Plácido, analisando também a rede de relações literárias com personagens do passado, Madame de Staël, George Sand, marquesa de Alorna e Catarina de Balsemão, e do presente, em particular Camilo Castelo Branco. Desse conjunto procurámos instrumentos para aceder aos códigos autobiográficos, imprescindíveis para uma análise textual desta natureza. Quanto à análise literária das obras, procurámos que fosse o mais possível abrangente. Em linhas gerais, apoia-se nos estudos semióticos, estruturalistas e estilísticos, incluindo os retóricos, e abarca igualmente a teoria da receção. Procuramos assim pôr em evidência, não só, o interesse documental da sua obra (particularmente no que toca à condição feminina no século XIX), destacando a singularidade da escrita placiana em termos individuais, sociais e literários
Spin networks and sturmian orbitals: Orthogonal complete polynomial sets in molecular quantum mechanics
No full textAn outline is given of current advances on some basic ingredients of applied quantum mechanics, that were previously developed along different lines and are now being compacted within a unifying framework. Specifically, (i) complete orthogonal expansion basis sets for the atomic and molecular orbitals of quantum chemistry are classified within angular momentum theory, presently incorporated in and generalized as spin network theory; (ii) spin-networks and the underlying theory of hypergeometrical polynomials are presented within a graphical approach; (iii) the combinatorial significance of the graphical approach is given a projective geometry foundation; (iv) emergence and role of hidden (Regge's) symmetries are revealed and discussed in a variety of contexts
Interactions between sex, socioeconomic level, and children´s cognitive performance
No full textThis study assesses the interactions between sex, socioeconomic level, and children’s cognitive performance. Cognitive performance was measured for a sample of 453 Portuguese children, aged between 4 and 10 years, with 218 boys and 235 girls; verbal and nonverbal cognitive ability and intelligence quotient were measured by the Cognitive Skills Scale for Children. Multivariate analysis of variance assessed the
effects of sex and family’s socioeconomic level on intelligence quotient. A statistically significant interaction between sex and socioeconomic level was observed for nonverbal intelligence quotient, total intelligence quotient, and two subtests. Socioeconomic level had more influence than sex on most of the cognitive tests.The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the Fundac¸ a˜ o para a Cieˆ ncia e Tecnologia, IP (FCT) and the POCH/FSE under Grant SFRH/BD/85110/2012 to Ana-Filipa Alves
The criticism of Ana Cristina Cesar in \'Escritos no Rio\'
No full textEsta pesquisa se propõe ao estudo dos textos críticos de Ana Cristina Cesar presentes na edição póstuma, Escritos no Rio. A dissertação se divide em três partes: \"O impacto do autoritarismo\", que discute sua relação com as questões autoritárias no campo da literatura e da cultura em geral. \"O impasse com a tradição\", que analisa alguns juízos de valor da autora levando em conta sua relação com a tradição crítica e literária. E \"A problematização de posições\", que aborda alguns posicionamentos de Ana Cristina sobre a relação do escritor com o momento histórico.This research is focused on the Ana Cristina Cesar\'s critical texts which are found in the posthumous edition, Escritos no Rio. This paper is divided in three parts: \"The impact on the authoritarianism\" which discusses its relation between the authoritarian issues in the literary field and culture in general. \"The impasse in the tradition\" which analyzes some of the author\'s value judgements taking into consideration her relation between critical and literary tradition. And \"The problematization of positions\" which approaches some Ana Cristina\'s opinions on the relation between the author and his/her social context
On the sensitivity of Von Neuman and Morgenstern abstract stable sets : the stable and the individual stable bargaining set
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