bluuebunny/crossref_metadata_2025_split huggingface dataset:
Acurácia do diâmetro de ponta de cones de gutapercha com diferentes conicidades
Authors: Castilho Eloísa Higashi , Britto Maria Leticia Borges , Machado Manoel Eduardo de Lima , Nabeshima Cleber Keiti 
Published: December 2022

Objetivo: O objetivo deste estudo foi analisar o diâmetro da ponta de cones de guta-percha com diferentes conicidades, considerando a especificação do fabricante. Materiais e Métodos: Cento e quarenta cones de guta percha (Dentsply Maillefer): F2, F3, e 25, 30, 35 e 40 de conicidade .02, .04 e .06 (n = 10) foram utilizados neste estudo. Os cones foram presos em uma régua calibradora, e observados em microscópio ótico com aumento de 40x. Então, o diâmetro da ponta de cada cone foi medido com paquímetro digital. Os dadosforam categorizados como corretos ou incorretos utilizando margem de erro de ±0,01 mm e submetidos ao teste Exato de Fisher (p ≤ 0,05). Resultados: Somente 4 cones de guta percha estavam incorretos, porém não houve diferença estatisticamente significativa entre os cones em relação ao padrão estabelecido pelo fabricante. Conclusão: Conclui-se que os cones principais da marca Dentsply Maillefer, independente de sua conicidade (.02, .04, .06, F2 e F3), possuem o diâmetro da ponta calibrado de acordo com a especificação do fabricante.Descritores: Guta-percha. Obturação do canal radicular. Endodontia.
Perfil dos orientadores de bolsistas de Iniciação Científica da Faculdade de Odontologia da Universidade Federal de Minas Gerais
Authors: Freitas Gabrielle Amaral , Zarzar Patrícia Maria Pereira de Araúo , Paiva Saul Martins , Pordeus Isabela Almeida , Ferreira Fernanda Morais 
Published: December 2022

O objetivo desse estudo foi traçar o perfil dos orientadores de Iniciação científica da Faculdade de odontologia da Universidade Federal de Minas Gerais durante uma década. Foi feita uma avaliação retrospectiva da formação, da carreira e da experiência de orientações na pós-graduação e na graduação dos professores da instituição que orientaram alunos como bolsistas do Programa de Iniciação científica de 2006 a 2016, com base em informações dos currículos cadastrados na plataforma Lattes do CNPq. A produção intelectual dos docentes foi analisada (quanti e qualitativamente, Qualis 2015). Para avaliar a correlação entre o número de orientações de Iniciação cientifica e as demais variáveis numéricas, foi usado o coeficiente de correlação de Spearman. Para verificar se existia diferença entre o número de orientações de Iniciação cientifíca entre as categorias das variáveis categóricas, foram usados os testes de Mann-Whitney e Kruskal-Wallis. Pouco mais de 38% (n=44) do total de professores da Instituição, com formações, tempo de titulação e níveis de carreira diversos, alocados nos 4 departamentos, orientaram bolsistas no período; dos quais 18 tinham orientações em andamento. Quase 90% destes apresentam vínculo com Programa de pós-graduação. As áreas responsáveis pelo maior número de bolsas vigentes são a Odontopediatria e Odontologia social e preventivas. O número de orientações de iniciação científica concluídas e em andamento por orientador apresentou correlação positiva e significante (rs, p<0,05) com a produção científica qualificada (≥ B3) e com o número de orientações de pós-graduação stricto sensu, mas não esteve correlacionada a outras produções e orientações. Embora o perfil de orientadores de iniciação científica entre o período de 2006-2016 tenha sido diversificado, é possível identificar algumas particularidades e, sobretudo, detectar que a participação no Programa é pequena diante do total de docentes com titulação e capacidade de orientação e do número de alunos da Instituição.

Descritores: Academias e Institutos. Educação Superior. Pesquisa em Odontologia. Pesquisadores.
Acesso aos serviços de saúde bucal em Campina Grande/Paraíba: um estudo de série temporal
Authors: Bezerra de Lima Thaynná Barboza , Sobreira Duarte Bezerra Lígia Natália , Ferreira Amorim Heloísa Raquel , Wanderley Gomes Freire Déborah Ellen , Rocha Madruga Renata Cardoso 
Published: December 2022

Introdução: Este estudo avaliou o acesso aos serviços odontológicos em áreas cobertas pela Estratégia Saúde da Família em Campina Grande – PB, comparando as séries temporais dos anos de 2009 e 2014.
Materiais e Métodos: Tratou-se de um estudo quantitativo, analítico, com desenho do tipo transversal, de base populacional, do seguimento de dois estudos, com dados primários coletados prospectivamente, longitudinal ou de seguimento. A análise dos dados foi realizada através do SPSS 18.0, em duas etapas: uma descritiva e outra analítica. Na primeira foram feitas as distribuições de frequência das variáveis quantitativas, na segunda foram testadas as associações, utilizando-se o Qui quadrado de Pearson. Para todas as análises foi considerado significante o nível de 5%.
Resultados: Os fatores sócio-bio-demográficos associados ao acesso no estudo de 2009, foram: idade, estado civil, renda do respondente e escolaridade. Em 2014, além desses, esteve associada à renda familiar.
Conclusão: Pôde-se concluir que a equidade não está sendo respeitada. Este estudo pretende dar uma contribuição para a lacuna existente na avaliação de tais serviços.
Palavras-Chave: Estratégia Saúde da Família. Serviços de Saúde Bucal. Acesso aos serviços de Saúde.
Propriedades físico-químicas de cimentos endodônticos à base de óxido de zinco e eugenol
Authors: Alves de Santana Castro Gabriela , Silva Morais Malena Ana , Monteiro Falcão Carlos Alberto , Reinaldo Lima Luciana , Arêa Leão Ferraz Maria Ângela 
Published: December 2022

Objetivo: Analisar as propriedades físico-químicas, escoamento, tempo de presa, solubilidade e alteração dimensional, dos cimentos endodônticos à base de óxido de zinco e eugenol: Endomethasone N, Endofill e Grosmann, de acordo com a especificação número 57 da American Dental Association.
Métodos: Realizou-se os testes nas condições ambientais de 23° ± 2°C e 50 ± 5% de umidade relativa do ar, mantidas 48 h antes dos procedimentos, repetindo-se cinco vezes e obtendo-se uma média aritmética.
Resultados: Os cimentos à base de óxido de zinco e eugenol analisados apresentaram tempo de endurecimento elevados, para o teste de escoamento, o Endofill e Grossman apresentaram-se acima do estabelecido. Em relação à solubilidade, o Endomethasone N esteve dentro do padrão e os demais cimentos excederam.
Conclusão: Todos os cimentos analisados obtiveram valores diferentes do recomendado para alteração dimensional. Nenhum dos cimentos enquadrou-se completamente nas normatizações.
Descritores: Odontologia. Propriedades físicas e químicas. Pesquisa em odontologia.
Hospitalização para casos de câncer de boca e faringe no Brasil
Authors: Lucas Brum Moreira da Silva Thalita , Alexandra Alves Waneska , De Paula Lopes Rosado Lucas , Ketrine Lustosa Souza Brisa , Nascimento de Aquino Sibele 
Published: December 2022

Objetivo: Avaliar a internação hospitalar por câncer de boca e faringe no Brasil no período de 2008 a 2017.
Métodos: Estudo das internações por estas neoplasias registradas no Sistema de Informação Hospitalar disponíveis no DATASUS/MS entre 2008 e 2017.
Resultados: Foram registradas 263.556 mil internações por câncer de boca e faringe. O Sudeste apresentou a maior frequência de casos (44,3%). A maior taxa de internação ocorreu no Sul (19,6/100 mil habitantes). As maiores taxas de letalidade encontradas foram no Norte (12,7%) e Sudeste (12,3%). Houve um predomínio de internações em regime privado (53,5%) e em caráter de urgência no Brasil (53,5%). A média de permanência hospitalar foi de 6,4 dias. A taxa de letalidade em caráter de urgência foi maior do que em caráter eletivo. A taxa de internação apresentou tendência decrescente e a taxa de letalidade hospitalar, tendência de incremento de 0,2% a cada ano. A análise de índice de desenvolvimento humano médio e taxa de internação mostrou correlação moderada positiva entre essas variáveis e as regiões do país. Houve maior custo médio em reais por internação hospitalar em caráter eletivo e a região Centro-Oeste obteve maior média de custo financeiro (por guia autorizada) nesta modalidade.
Conclusão: Observa-se um elevado número de internações por estes tipos de câncer no Brasil, além de um acentuado custo e alta média de permanência hospitalar, sendo variável entre as regiões do país.
Descritores: Neoplasias bucais. Hospitalização. Mortalidade.
The Power of Partnership in Open Government
Authors: Piotrowski Suzanne J. , Berliner Daniel , Ingrams Alex 
Published: December 2022

What the Open Government Partnership tells us about how international initiatives can and do shape domestic public sector reform.
At the 2011 meeting of the UN General Assembly, the governments of eight nations—Brazil, Indonesia, Mexico, Norway, Philippines, South Africa, the United Kingdom, and the United States—launched the Open Government Partnership, a multilateral initiative aimed at promoting transparency, empowering citizens, fighting corruption, and harnessing new technologies to strengthen governance. At the time, many were concerned that the Open Government Partnership would end up toothless, offering only lip service to vague ideals and misguided cyber-optimism. The Power of Partnership in Open Government offers a close look, and a surprising affirmation, of the Open Government Partnership as an example of a successful transnational multistakeholder initiative that has indeed impacted policy and helped to produce progressive reform.
By 2019 the Open Government Partnership had grown to 78 member countries and 20 subnational governments. Through a variety of methods—document analysis, interviews, process tracing, and quantitative analysis of secondary data—Suzanne J. Piotrowski, Daniel Berliner, and Alex Ingrams chart the Open Government Partnership's effectiveness and evaluate what this reveals about the potential of international reform initiatives in general. Their work calls upon scholars and policymakers to reconsider the role of international institutions and, in doing so, to differentiate between direct and indirect pathways to transnational impact on domestic policy. The more nuanced and complex processes of the indirect pathway, they suggest, have considerable but often overlooked potential to shape policy norms and models, alter resources and opportunities, and forge new linkages and coalitions—in short, to drive the substantial changes that inspire initiatives like the Open Government Partnership.
This book will be available in an open access format to coincide with the print publication date.
Copyright's Broken Promise
Authors: Willinsky John 
Published: December 2022

A comprehensive proposal for reforming copyright law to ensure sustainable public access to research and scholarship.
Open access is widely supported by researchers, librarians, scholarly societies, and research funders, as well as large and small publishers. Yet despite this support—and the pandemic's demonstration of the importance of open access for scientific progress—the scholarly publishing market is failing to deliver open access quickly enough. In Copyright's Broken Promise, John Willinsky presents the case for reforming copyright law so that it supports, rather than impedes, public access to research and scholarship. He draws on the legal strategy of statutory licensing to set out the terms and structures by which the Copyright Act could ensure that publishers are fairly compensated for providing immediate open access.
What sets Willinsky's analysis apart is its focus on the current state of scholarly publishing. Because copyright offers so little legal support for moving publishing to open access despite the benefit for science, he says it is time to stop regarding the Copyright Act as a law of nature that can only be circumvented, contravened, or temporarily set aside. Specifically, he proposes that the Copyright Act add a new category of work, called “research publications,” which would be subject to statutory licensing. This would allow publishers to receive royalty payments from the principal institutional users (universities, industry R&D, research institutes, and so on) and sponsors of the work (foundations and government agencies), while providing immediate open access.
Generalized Langevin theory for many-body problems in chemical dynamics: The equivalent chain equations for solute motion in molecular solvents
Authors: Adelman Steven A. , Balk Michael W. 
Published: July 2002

A generalized Langevin equation framework for the treatment of liquid state influence on solute dynamics in molecular solvents, which generalizes an earlier framework restricted to monatomic solvents [S. A. Adelman, Adv. Chem. Phys. 53, 61 (1983)], is developed. This framework permits one to realistically treat energy exchange between the solute atoms and the solvent vibrational (V) degrees of freedom. This energy exchange can qualitatively influence the rates of liquid state processes when the solute frequencies relevant to the process of interest (e.g., a solute normal mode frequency if one is interested in the vibrational energy relaxation of that mode) substantially overlap the V bands of the frequency spectrum describing local solvent density fluctuations. The main result of the present analysis is an infinite set of equivalent chain equations governing the dynamics of the solute configuration point in molecular solvents. These are equations of motion for the solute configuration point and for the coordinates of an infinite set of abstract chain ‘‘molecules’’. Each molecule is composed of r+1 ‘‘atoms’’ where r is the number of normal modes of a real solvent molecule. The nearest neighbor chain of fictitious molecules may alternatively be regarded as a set of r+1 nearest neighbor cross-linked ‘‘atomic’’ chains. Atomic chain 1 executes low frequency
‘‘acoustical’’ motions which simulate the influence of local solvent translational–rotational (TR) density fluctuations. Atomic chains 2,3,. . .,r+1 execute high frequency ‘‘optical’’ motions which simulate the influence of normal mode V local solvent density fluctuations. The coupling of the optical and acoustical branches of the chain by the crosslinks is the chain formalism equivalent of the physical coupling, due to liquid state effects, of the temporal development of the TR and V modes of motion. The theory presented in this paper provides a conceptual foundation for the treatment of liquid state reactions occuring in molecular solvents by stochastic dynamics techniques. This conceptual foundation may be made the basis of practical simulation methods for treating reactions of diatomic solutes in molecular solvents and may be further developed to provide practical simulation methods for polyatomic solutes in molecular solvents.
High resolution IR laser spectroscopy of van der Waals complexes in slit supersonic jets: Observation and analysis of ν1, ν1+ν2, and ν1+2ν3 in ArHF
Authors: Lovejoy Christopher M. , Schuder Michael D. , Nesbitt David J. 
Published: July 2002

IR spectra of jet cooled ArHF are obtained via direct absorption of a high resolution tunable difference frequency laser in a 2.54 cm path length, slit supersonic pulsed expansion at &lt;10 K. Detection limits of 2×109 molecules/cm3/quantum state permit observation of the high frequency ν1 fundamental stretch (1000) ← (0000), the ν1+ν2 van der Waals bend plus stretch combination band (1110) ← (0000), as well as transitions to the (1002) triply vibrationally excited state that are weakly allowed via Coriolis interactions with the Π+ component of the (1110) manifold. The ground state (0000) molecular constants are in excellent agreement with previous microwave data. From the changes in rotational and centrifugal distortion constants, the vibrationally averaged van der Waals well depth is estimated to increase (+15%) with ν1 excitation, but decrease dramatically (−42%) upon subsequent excitation of the l=1 ν2 bend. L-doubling in the ν1+ν2 (1110) perpendicular bending state is large and negative [−69.8(18) MHz] and indicates the presence of a near resonant Coriolis coupled
vibration of Σ+ symmetry at lower energy. A second, localized Coriolis perturbation is observed in the (1110) state and assigned to the near resonant (1002) Σ+ fundamental plus van der Waals stretch overtone at higher energy. Analysis of this Coriolis interaction indicates that coupling can be significant even for a three quantum change in vibration. However, a perturbative, small amplitude oscillator model predicts Coriolis matrix elements only 18% of the observed values, suggesting that large amplitude, bend–stretch interactions can strongly enhance Coriolis coupling. The decrease in the B rotational constant and the vibrationally averaged well depth upon ν2 excitation confirms the strong coupling between van der Waals stretch and bend coordinates. The slit expansion geometry quenches perpendicular velocity distributions and therefore offers intrinsically sub-Doppler resolution in an unskimmed molecular beam. Residual linewidths in the ArHF spectra are all below the apparatus resolution limit of ±25 MHz, which translates into a lower limit for the predissociation lifetime of 3 ns, i.e., in excess of 2×106 ν1 vibrational periods.
On understanding the relationship between structure in the potential surface and observables in classical dynamics: A functional sensitivity analysis approach
Authors: Judson Richard S. , Rabitz Herschel 
Published: July 2002

The relationship between structure in the potential surface and classical mechanical observables is examined by means of functional sensitivity analysis. Functional sensitivities provide maps of the potential surface, highlighting those regions that play the greatest role in determining the behavior of observables. A set of differential equations for the sensitivities of the trajectory components are derived. These are then solved using a Green’s function method. It is found that the sensitivities become singular at the trajectory turning points with the singularities going as η−3/2, with η being the distance from the nearest turning point. The sensitivities are zero outside of the energetically and dynamically allowed region of phase space. A second set of equations is derived from which the sensitivities of observables can be directly calculated. An adjoint Green’s function technique is employed, providing an efficient method for numerically calculating these quantities. Sensitivity maps are presented for a simple collinear atom–diatom inelastic scattering problem and for two Henon–Heiles type Hamiltonians modeling
intramolecular processes. It is found that the positions of the trajectory caustics in the bound state problem determine regions of the highest potential surface sensitivities. In the scattering problem (which is impulsive, so that ‘‘sticky’’ collisions did not occur), the positions of the turning points of the individual trajectory components determine the regions of high sensitivity. In both cases, these lines of singularities are superimposed on a rich background structure. Most interesting is the appearance of classical interference effects. The interference features in the sensitivity maps occur most noticeably where two or more lines of turning points cross. The important practical motivation for calculating the sensitivities derives from the fact that the potential is a function, implying that any direct attempt to understand how local potential regions affect the behavior of the observables by repeatedly and systematically altering the potential will be prohibitively expensive. The functional sensitivity method enables one to perform this analysis at a fraction of the computational labor required for the direct method.
Spectra and structure of organophosphorus compounds. XXXIII. Microwave, infrared, and Raman spectra, structure, conformational stability, and vibrational assignment for ethylphosphonothioic difluoride
Authors: Durig J. R. , Johnson R. D. , Nanaie H. , Hizer T. J. 
Published: July 2002

The microwave spectra of ethylphosphonothioic difluoride, CH3CH2P(S)F2, and eight isotopic species have been investigated in the region from 26.5 to 39.5 GHz. Only a-type transitions were observed and R-branch assignments have been made for all the isotopic species in the ground vibrational state for both the gauche and trans (methyl group trans to the P=S bond) conformers from which the rotational constants were determined. From these data the complete r0 structural parameters were determined for the gauche conformer with the values for the heavy atom parameters being: r(C–C)=1.532±0.006 Å, r(C–P)=1.800±0.007 Å, r(P=S)=1.880±0.003 Å, r(P–F)=1.555±0.005 Å, ∢CCP=112.6±0.3°, ∢CPS=119.4±0.4°, ∢CPF=102.0±0.2°, dih ∢FPCS=129.3±0.2°, and dih ∢CCPS=56.9±0.2°. The parameters of the trans conformer which differed significantly from the values for the corresponding ones in the gauche conformer were: r(C–P)=1.814±0.011 Å, r(P=S)=1.861±0.007 Å, and ∢CCP=114.8±0.2°. The infrared (3500 to 40 cm−1) and Raman (3500 to 20 cm−1) spectra of the gaseous and solid CH3CH2P(S)F2 and CD3CD2P(S)F2 as well as the Raman spectrum of the liquid have been recorded. Both trans and gauche conformers have been identified in the vibrational spectra of the fluid phases, but only the trans corformer remains in the solid state and a complete vibrational assignment is proposed for the trans conformer. The barrier to methyl rotation for the trans conformer was determined to be 808 cm−1 (2.31 kcal/mol). The asymmetric torsion for the trans conformer was observed as a series of closely spaced Q branches beginning at 73.25 cm−1 and falling to lower frequency and the gauche transitions begin at 70.82 cm−1. These transitions along with the dihedral angle for the gauche conformer have been used to obtain the potential
function for the asymmetric rotation which indicates that the trans conformer is more stable than the gauche conformer in the gas phase by 63±37 cm−1 (180±106 cal/mol). All of these results are compared with corresponding quantities for several similar organophosphorus compounds.