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Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
A s s e s s m e n t o f t h e L e v e l s o f P a r a t h y r o i d H o r m o n e , O e s t r o g e n a n d S e l e c t e d B o n e M i n e r a l s i n M e n o p a u s a l W o m e n
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Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Multinuclear and Dynamic NMR Study of trans-[Pt(Cl)(PHCy2)2(PCy2)], [Pt(Cl)(PHCy2)3][BF4], [Pt(Cl)(PHCy2)3][Cl], trans-[Pt(Cl)(PHCy2)2{P(S)Cy2}], and trans-[Pt(Cl)(PHCy2)2{P(O)Cy2}]. Influence of Intramolecular P=O···H-P and Cl···H-P Interactions on Restricted Rotation about Pt-P Bond. X-ray Structure of trans-[Pt(Cl)(PHCy2)2{P(O)Cy2}]
No full textDynamic NMR expts. on trans-[Pt(Cl)(PHCy2)2{P(X)Cy2}]z where X is a lone pair (1, z = 0), H (2, z = +1), S (3, z = 0), or O (4, z = 0) show that the rotation around the P(X)-Pt bond is hindered for all mols. studied, with G.thermod. ranging from 8.2 to 11.0 kcal/mol. The highest value of the series was calcd. for trans-[Pt(Cl)(PHCy2)2{P(O)Cy2}] (4) where intramol. P:OH-P interactions act as a mol. brake at room temp. Single-crystal x-ray diffraction confirms the presence of both intra and intermol. P:OH interactions in solid 4. In the case of [Pt(Cl)(PHCy2)3]Cl, multinuclear NMR anal. indicates a P-HCl- interaction in arom. or halogenated solvents which could have also a minor effect on the rotational barrier around the P(X)-Pt bond
Larry O. Spencer, Conference Author Presentation
No full textGen. Larry O. Spencer, USAF (Ret.), author of Dark Horse: A Journey from the Horseshoe to the Pentago
Probabilistic framework to evaluate the resilience of engineering systems using Bayesian and dynamic Bayesian networks
No full textResilience indicators are a convenient tool to assess the resilience of engineering systems. They are often used in preliminary designs or in the assessment of complex systems. This paper introduces a novel approach to assess the time-dependent resilience of engineering systems using resilience indicators. A Bayesian network (BN) approach is employed to handle the relationships among the indicators. BN is known for its capability of handling causal dependencies between different variables in probabilistic terms. However, the use of BN is limited to static systems that are in a state of equilibrium. Being at equilibrium is often not the case because most engineering systems are dynamic in nature as their performance fluctuates with time, especially after disturbing events (e.g. natural disasters). Therefore, the temporal dimension is tackled in this work using the Dynamic Bayesian Network (DBN). DBN extends the classical BN by adding the time dimension. It permits the interaction among variables at different time steps. It can be used to track the evolution of a system's performance given an evidence recorded at a previous time step. This allows predicting the resilience state of a system given its initial condition. A mathematical probabilistic framework based on the DBN is developed to model the resilience of dynamic engineering systems. Two illustrative examples are presented in the paper to demonstrate the applicability of the introduced framework. One example evaluates the resilience of Brazil. The other one evaluates the resilience of a transportation system.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Integral Design & Managemen
Multinuclear and Dynamic NMR Study of trans-[Pt(Cl)(PHCy2)2(PCy2)], [Pt(Cl)(PHCy2)3][BF4], [Pt(Cl)(PHCy2)3][Cl], trans-[Pt(Cl)(PHCy2)2{P(S)Cy2}], and trans-[Pt(Cl)(PHCy2)2{P(O)Cy2}]. Influence of Intramolecular PO···H−P and Cl···H−P Interactions on Restricted Rotation about Pt−P Bond. X-ray Structure of trans-[Pt(Cl)(PHCy2)2{P(O)Cy2}]
No full textDynamic NMR experiments on trans-[Pt(Cl)(PHCy2)(2){P(X)Cy-2}](z) where X is a lone pair (1, z = 0), H (2, z = + 1), S (3, z = 0), or 0 (4, z = 0) show that the rotation around the P(X)-Pt bond is hindered for all molecules studied, with Delta(double dagger) ranging from 8.2 to 11.0 kcal/mol. The highest value of the series was calculated for trans-[Pt(Cl)(PHCy2){P(O)Cy-2}] (4) where intramolecular P=(OH)-H-...-P interactions act as a molecular brake at room temperature. Single-crystal X-ray diffraction confirms the presence of both intra and intermolecular P=(OH)-H-... interactions in solid 4. In the case of [Pt(Cl)(PHCy2)(3)]Cl, multinuclear NMR analysis indicates the presence of a P-(HCl-)-Cl-... interaction in aromatic or halogenated solvents which could have also a minor effect on the rotational barrier around the P(X)-Pt bond
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Regula????o e desempenho de servi??os p??blicos em regime de concess??o: an??lise do transporte ferrovi??rio de cargas no Brasil p??s-privatiza????es
No full textO desenvolvimento do transporte ferrovi??rio no Brasil teve diferentes fases, que foram
marcadas por distintas formas de participa????o do Estado na provis??o e regula????o desse servi??o p??blico (incluindo o per??odo em que o mesmo acumulou as duas fun????es, entre as d??cadas de 1950 e 1990). Os graves problemas estruturais e financeiros que atingiram o sistema ferrovi??rio brasileiro a partir da d??cada de 1980 levaram o setor a ser privatizado na d??cada seguinte. Nesse ??nterim, a desestatiza????o do sistema ferrovi??rio
brasileiro acompanhou uma tend??ncia internacional de privatiza????o e
desregulamenta????o de setores de infraestrutura, o que ocorreu no rastro das reformas de orienta????o neoliberal promovidas ap??s a deflagra????o da crise do Estado na d??cada de1970. Nesse novo contexto, a regula????o deve, fundamentalmente, ter a miss??o de incentivar e garantir os investimentos necess??rios, proteger os usu??rios, promover o bem-estar da sociedade e aumentar a efici??ncia da presta????o desse servi??o p??blico. Nesse sentido, a reestrutura????o do sistema ferrovi??rio brasileiro implicou no estabelecimento de um marco regulat??rio, que, atualmente, vem sendo revisado e aperfei??oado. O presente trabalho tem como objetivo mais geral analisar a rela????o entre a regula????o (especialmente o marco regulat??rio) do transporte ferrovi??rio de cargas
brasileiro e o desenvolvimento do setor no per??odo p??s-privatiza????es. Nesse sentido, s??o
examinados os alcances e limites do marco regulat??rio, institu??do no bojo das
privatiza????es, no que tange ?? promo????o dos objetivos e fins pretendidos com a
regula????o do servi??o p??blico de transporte ferrovi??rio de cargas, quais sejam garantir a
viabilidade econ??mica da atividade, criar condi????es para investimentos em melhoria e
expans??o de sua presta????o e, notadamente, assegurar a observ??ncia do interesse p??blico
no que diz respeito ao padr??o de oferta (em termos de regularidade, efici??ncia e de
aumento da produ????o e da qualidade da oferta). Constatou-se que a regula????o p??sprivatiza????o foi capaz de viabilizar a consecu????o de alguns avan??os importantes em
termos de aumento global da produ????o ferrovi??ria e da seguran??a do transporte
ferrovi??rio de cargas (aspectos parametrizados do marco regulat??rio), mas fracassou ao n??o evitar a ocorr??ncia de distor????es como a baixa competitividade, a pouca integra????o da malha e a forte concentra????o de investimentos, de tipos de cargas transportadas e da utiliza????o efetiva da malha em poucos trechos de maior rentabilidade comercial para as empresas. A an??lise empreendida no trabalho sugere que o padr??o de oferta do transporte ferrovi??rio de cargas se aproximou muito mais dos objetivos empresariais das concession??rias, que, de acordo com a sua l??gica comercial, tendem a explorar a malha ferrovi??ria apenas nos trechos (e para o transporte das mercadorias) que lhes sejam mais rent??veis, do que do interesse p??blico, que envolve, conforme cunhado na abordagem te??rica da regula????o, a presta????o do servi??o de forma eficiente (cujos custos e benef??cios
garantam o bem-estar da sociedade), em condi????es adequadas de disponibilidade e
qualidade e, n??o menos importante, com vistas ?? sua expans??o e ?? modicidade das
tarifas cobradas pela sua presta????o
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