bluuebunny/crossref_metadata_2025_split huggingface dataset:
Estudo comparativo entre planigrafia convencional, planigrafia digital e ressonância magnética da ATM em pacientes com disfunção temporomandibular
Authors: Kalczuk Liana , Cabral Luiz Antônio Guimarães 
Published: April 2017

A proposta deste trabalho foi analisar as alterações ósseas da ATM de 75 pacientes com desordens temporomandibulares, por meio de imagens de planigrafia convencional, planigrafia digital e ressonância magnética. O índice temporomandibular foi usado para selecionar os pacientes com alterações intra-articulares, excluindo-se aqueles com somente alterações musculares. Os pacientes foram divididos em três grupos de 25 sujeitos; o grupo 1 foi submetido à planigrafia convencional, o grupo 2 à planigrafia digital e o grupo 3 à ressonância magnética. O teste do qui-quadrado (χ2 ) foi usado para se comparar o número de alterações ósseas da ATM visto nos três grupos, divididas tais alterações em cinco aspectos: espaço articular anterior, cabeça da mandíbula, eminência articular, movimento e posição da cabeça da mandíbula. A planigrafia convencional e a digital tiveram a qualidade de suas imagens analisada pelo programa Aeroimagem 1.0 (Instituto de Estudos Avançados, IEAv, FAB , São José dos Campos, SP, Brasil). O grupo 2 mostrou mais alterações ósseas da ATM do que os grupos 1 (p=0,012) e 3 (p=0,00). Os grupos 1 e 3 não diferiram significativamente entre si (p=0,018). As imagens de planigrafia digital mostraram maior número e melhor distribuição dos níveis de cinza que as de planigrafia convencional pelo programa Aeroimagem 1.0. A planigrafia digital mostrou maior número de alterações ósseas da ATM do que a planigrafia convencional e a ressonância magnética. A planigrafia convencional e a ressonância não diferiram entre si neste aspecto. A planigrafia digital ofereceu maior quantidade de informações e qualidade de imagem que a convencional.
Prevalência de lesões cervicais não cariosas em acadêmicos de Odontologia da Universidade Estadual da Paraíba
Authors: Oliveira Ricardo Lima de , Catão Maria Helena Chaves de Vasconcelos , Carneiro Vanda Sanderana Macêdo 
Published: April 2017

Lesões cervicais não cariosas apresentam diversos fatores etiológicos, sendo a sua origem muitas vezes relacionada à presença de interferências oclusais. Este trabalho avaliou a prevalência e severidade das lesões não cariosas e contatos prematuros em dentes permanentes dos acadêmicos de Odontologia da Universidade Estadual da Paraíba. Foram selecionados 50 alunos aleatoriamente por sorteio da lista de acadêmicos matriculados no primeiro semestre de 2010. Foi aplicado formulário envolvendo tópicos relacionados com hábitos parafuncionais e condições bucais, e cada indivíduo foi ainda submetido a exame clínico, onde a sensibilidade dentinária foi testada por pressão táctil na superfície das lesões com sonda clínica nº 5 e mensurado por escala analógica da dor e parâmetros de hipersensibilidade. A idade média dos pesquisados foi de 22,3 anos. No exame clínico a média foi de 29 dentes, que totalizaram 1442 dentes examinados; 11,3% apresentaram lesões cervicais não cariosas, com média de 4 lesões por individuo. Os contatos exagerados representaram 27,6% dos dentes com lesão cervical não cariosa. 35,1% dos acometidos apresentaram sensibilidade aguda apenas durante a aplicação do estímulo, enquanto os que não tinham lesão apresentaram ausência de sensibilidade. 58,3% apresentam hipersensibilidade dentinária grau 1, com teste de exato de Fisher (p=0,007) evidenciando relação significativa entre sensibilidade e graus da hipersensibilidade. Concluiu-se que a hipersensibilidade dentinária está significativamente relacionada à presença de lesões cervicais não cariosas.
Comparação da variação da temperatura produzida por dois tipos de instrumentos cortantes rotatórios diamantados no preparo cavitário
Authors: Aranha Valéria Meireles dos Santos , Concílio Laís Regiane da Silva , Neves Ana Christina Claro , Barcellos Daphne Câmara , Rode Sigmar de Mello 
Published: April 2017

Objetivo: O objetivo desse estudo foi comparar as variações de temperatura no interior da câmara pulpar provocadas por dois tipos de instrumento cortante rotatório (ICR), a ponta diamantada padrão e Turbo, que promete redução na transmissão de calor. Método: Foram realizados preparos para coroa total na face vestibular de vinte molares humanos extraídos. Os dentes foram divididos em 2 grupos (n-10): Grupo 1 - ponta diamantada padrão nº 4219; Grupo 2 - ponta diamantada Turbo nº 4219T. Para cada preparo foi utilizado um novo ICR e a profundidade do preparo foi de 1,4mm. A espessura de dentina foi padronizada de 2,81 mm. Para leitura das temperaturas foi introduzido um dispositivo termopar na câmara pulpar. Os foram transferidos para o software IR-graph e submetidos ao teste Mann-Whitney (p<0,05). Resultados: os valores de variação de temperatura (Celsius): Grupo 1 - 0,73 ºC; Grupo 2 - 0,4 ºC. Os preparos cavitários realizados com os dois tipos de ICRs geraram alterações de temperatura semelhantes (p>0.05). Conclusão: Os ICRs padrão e Turbo apresentaram mesmo comportamento quanto à capacidade de gerar calor. Descritores: pontas diamantadas; preparo cavitário; aquecimento; temperatura.
Predicción de la distribución de dividendos en Argentina empleando un modelo lineal generalizado mixto
Authors: González Mariana Verónica , Moneta Pizarro Adrián Maximiliano 
Published: April 2017

Durante las últimas décadas, la política de dividendos seguida por las empresas ha sido un tema de interés en diversas investigaciones, con apreciaciones distintas sobre los resultados conseguidos. En general, se admite que la decisión de distribuir dividendos por parte de una empresa es el resultado de un conjunto de factores relacionados, desde limitaciones de carácter jurídico hasta cuestiones vinculadas a la estructura financiera de la entidad y su situación de liquidez, pasando por la capacidad de la empresa para generar beneficios de manera sostenida y las necesidades de fondos impuestas por sus proyectos de inversión. En este sentido, muchos autores utilizan un conjunto de ratios contables para medir la sensibilidad de dichas variables frente a la decisión de repartir cantidades a cuenta de beneficios.En este trabajo se ajustó un modelo logístico mixto para predecir ladecisión de distribuir dividendos por parte de empresas argentinas que cotizaron en bolsa, entre los años 2003 y 2010, utilizando información de los estados contables y ratios definidos en la bibliografía. Se destaca el importante poder predictivo del indicador que mide la rentabilidad en función de las ganancias de la explotación, definido como el cociente entre la utilidad antes de intereses e impuestos y el activo total de la empresa.
Herramientas de contabilidad de gestión para generar valor económico, ambiental y social en activos biológicos forestales. Panel de control e indicadores estratégicos en silvicultura
Authors: Mancini Andrés Alberto 
Published: April 2017

Un proceso de planeamiento estratégico eficiente en la actividad silvícola exige disponer de un sistema integral de información contable y de gestión, a efectos de que las decisiones gerenciales durante el ciclo biológico de las plantaciones resulten de utilidad para potenciar en forma sustentable el valor del bosque bajo la meta del triple resultado.Al tratarse de una producción a largo plazo, con procesos continuosy terminales, se hace necesario que la capacidad de cambio que tienen los bosques cultivados sea manejada en forma objetiva por el hombre (gestión del cambio), pero también monitoreada por el control gerencial (medición del cambio).Los objetivos del artículo son:• Demostrar la utilidad de la información generada por la contabilidad de gestión para administrar y gestionar activos forestales,• Exponer una metodología para el diseño de una herramienta quepermita crear valor económico, social y ambiental en la gestión debosques cultivados.
Epistemología del individualismo y orden espontáneo en el pensamiento de F.A. Hayek
Authors: Suárez-Brito Alí Javier , Rincón-Camacaro Katherine Ysabel 
Published: April 2017

El artículo tiene como objetivo analizar la epistemología de las nociones de individualismo y orden espontáneo en el pensamiento del economista y filósofo F.A. Hayek. En virtud de esto, se recurre al método hermenéutico con diseño documental para interpretar la información bibliográfica y reflexionar en torno a las ideas centrales. Del análisis se deriva que las referidas nociones no pueden entenderse de forma separada, por cuanto una supone a la otra: el individualismo no es tan sólo un método, ni mucho menos una metodología particular, aunque la presupone; se trata de una teoría social que intenta explicar la forma como los individuos actúan y cooperan en un orden espontáneo que no ha sido creado deliberadamente.
Crowdsourcing como fuente de creatividad en el medio publicitario ecuatoriano
Authors: Barragán Castañeda Natalie , Santibáñez Vásquez José Daniel , Patiño Loor Ana Cristina 
Published: April 2017

Crowdsourcing es un término acuñado por Jeff Howe en 2006, en la revista Wired, para referirse a un modelo de producción y de solución de problemas para las marcas. Este artículo da una introducción a las situaciones que enfrentan las empresas al momento de solucionar un problema o de buscar ideas creativas. En ese camino se ha desarrollado la técnica del Crowdsourcing convirtiéndose en una fuente valiosa de creatividad.El presente documento también da a conocer las bases teóricasmediante la exposición de diversos autores que revelan sus puntos de vista sobre esta técnica, así como la explicación de casos internacionales y ecuatorianos que demuestran la eficacia del Crowdsourcing. En la investigación descriptiva se explora el conocimiento que tienen las empresas de Ecuador, principalmente de Guayaquil, en cuanto al Crowdsourcing y las oportunidades de utilizarla como una fuente de creatividad para las agencias de publicidad y áreas de mercadeo.Finalmente, se concluye que existe un cierto conocimiento sobreCrowdsourcing, aunque en el medio publicitario ecuatoriano todavía no se dan pasos firmes respecto de la incorporación activa de los consumidores en los procesos creativos de la marca.
Plan de Marketing Estratégico Ediciones UNL. Una propuesta para su elaboración e implementación
Authors: Modesto María Florencia 
Published: April 2017

Las editoriales universitarias se caracterizan por pertenecer a una Institución de Educación Superior; si bien editan y publican libros para la comunidad universitaria, también lo hacen para la sociedad de la que forman parte. Deben desenvolverse como empresas dentro de un mercado muy competitivo dado que son parte de la industria cultural más antigua de Occidente pero a su vez, en ellas, la edición es considerada una consecuencia de las tres funciones esenciales de toda universidad: docencia,investigación y extensión.La constante evolución y el crecimiento observados en los últimos años en este tipo de editoriales demandan la incorporación de herramientas de gestión que les permitan mejorar su eficiencia y eficacia, en beneficio de la sociedad en general.En este marco, la investigación se abordó bajo la hipótesis de que los enfoques y técnicas de negocios que se utilizan en la elaboración de un plan de marketing estratégico son aplicables a Ediciones UNL, sello editorial de la Universidad Nacional del Litoral.
Boundedness of Stable Solutions to Semilinear Elliptic Equations: A Survey
Authors: Cabré Xavier 
Published: April 2017

Abstract
This article is a survey on boundedness results for stable solutions to semilinear elliptic problems.For these solutions, we present the currently known

L
∞

${L^{\infty}}$

estimates that hold for all nonlinearities.Such estimates are known to hold up to dimension 4.They are expected to be true also in dimensions 5 to 9, but this is still an open problem which has only beenestablished in the radial case.
Influence of Heat Treatment on γ´ Phase and Property of a Directionally Solidified Superalloy
Authors: Xia P. C. , Xie K. , Cui H. Z. , Yu J. J. 
Published: April 2017

AbstractThe effects of heat treatment process on microstructure and properties of a nickel base superalloy are investigated. The size of γ´ phase decreases and the stress rupture life of alloy at 1100 °C/60 MPa drops with the rise of cooling rate. The hardness at room temperature also increases. The size of cuboidal γ´ precipitate and the volume of spherical γ´ precipitate increase with the rise of aging temperature. With higher aging temperature, the alloy exhibits bimodal γ´ phase. A reasonable combination of the size and volume fraction of cuboidal and spherical γ´ phase can obtain better stress rupture property at 1100 °C/60 MPa.
An Abnormal Increase of Fatigue Life with Dwell Time during Creep-Fatigue Deformation for Directionally Solidified Ni-Based Superalloy DZ445
Authors: Ding Biao , Ren Weili , Deng Kang , Li Haitao , Liang Yongchun 
Published: April 2017

AbstractThe paper investigated the creep-fatigue behavior for directionally solidified nickel-based superalloy DZ445 at 900 °C. It is found that the fatigue life shows an abnormal increase when the dwell time exceeds a critical value during creep-fatigue deformation. The area of hysteresis loop and fractograph explain the phenomenon quite well. The shortest life corresponds to the maximal area of hysteresis loop, i. e. the maximum energy to be consumed during the creep-fatigue cycle. The fractographic observation of failed samples further supports the abnormal behavior of fatigue life.
Experimental and Numerical Study on the Behavior of Rubberized Concrete
Authors: Hassanli R. , Mills J. E. , Li D. , Benn T. 
Published: April 2017

Abstract
In this study, the properties of rubberized concrete were examined and finite-element (FE) models were developed to investigate the accuracy of a current concrete material model in predicting the compressive behavior of rubberized concrete. The rubber particles, with a size of 1.18 mm were used at 0 %, 6 %, 12 %, and 18 % volume replacement of fine aggregate, keeping the proportions of gravel, water, and cement the same in all mixtures. Cylindrical and beam specimens were prepared and tested to evaluate the effect of rubber content on the density, compressive strength, elastic modulus, and damping ratio of the concrete. The results indicated that the damping ratio of rubberized concrete increased by 5.5 %, 27.8 %, and 64.8 % with rubber replacement of 6 %, 12 %, and 18 %, respectively. In addition to the experimental study, non-linear finite-element analysis was carried out using LS-DYNA software (Livermore Software Technology Corporation). The FE model developed in this paper was able to closely simulate the compressive behavior of the rubberized concrete specimens. The stiffness, compressive strength, volumetric response, and the dilation behavior obtained using the FE analysis agreed well with the values measured in the experimental work. The results show that the current concrete material model can be considered for rubberized concrete, provided that the compressive strength is modified to account for the reduction in strength caused by the added rubber.
Evaluation of the Specimen Saturation Criterion for the AASHTO T336 Test Method
Authors: Gudimettla J. , Tanesi J. , Crawford G. , Ardani A. 
Published: April 2017

Abstract
Realizing the importance of coefficient of thermal expansion (CTE) in concrete pavement design, the Federal Highway Administration conducted a ruggedness study for the AASHTO T336 test method in 2012. Of the seven variables that were evaluated as part of the ruggedness study, specimen saturation criterion was found to be one of the significant variables that warranted further investigation. This paper documents a follow-up study performed to specifically evaluate the effect of specimen saturation criterion on the measurement of CTE using the AASHTO T336 test method. CTE tests were conducted on multiple specimens from five concrete mixtures (two field and three laboratory prepared) at different levels of saturation in water: T336 criterion, 4 days, 7 days, 14 days, 28 days, and vacuum saturation. Data analysis from this study indicated that there is no statistical difference in CTE measurement after 28 days of water saturation versus T336 criterion, 4 days, 7 days, 14 days, and vacuum saturation. Based on this limited study, it appears that the current saturation criterion outlined in AASHTO T336 is adequate.
Toward a Digital Thread and Data Package for Metals-Additive Manufacturing
Authors: Kim D. B. , Witherell P. , Lu Y. , Feng S. 
Published: April 2017

Abstract
Additive manufacturing (AM) has been envisioned by many as a driving factor of the next industrial revolution. Potential benefits of AM adoption include the production of low-volume, customized, complicated parts/products, supply chain efficiencies, shortened time-to-market, and environmental sustainability. Work remains, however, for AM to reach the status of a full production-ready technology. Whereas the ability to create unique 3D geometries has been generally proven, production challenges remain, including lack of (1) data manageability through information management systems, (2) traceability to promote product producibility, process repeatability, and part-to-part reproducibility, and (3) accountability through mature certification and qualification methodologies. To address these challenges in part, this paper discusses the building of data models to support the development of validation and conformance methodologies in AM. We present an AM information map that leverages informatics to facilitate part producibility, process repeatability, and part-to-part reproducibility in an AM process. We present three separate case studies to demonstrate the importance of establishing baseline data structures and part provenance through an AM digital thread.
Concept-Based Text Mining Technique for Semantic Classification of Manufacturing Suppliers
Authors: Shotorbani P. Y. , Ameri F. 
Published: April 2017

Abstract
Small-to-medium sized enterprises (SMEs) in the manufacturing sector are increasingly strengthening their web presence in order to improve their visibility and remain competitive in the global market. With the explosive growth of unstructured content on the Web, more advanced methods for information organization and retrieval are needed to improve the intelligence and efficiency of the supplier discovery and evaluation process. In this paper, a technique for automated characterization and classification of manufacturing suppliers based on their textual portfolios was presented. A probabilistic technique that adopts Naïve Bayes method was used as the underlying mathematical model of the proposed text classifier. To improve the semantic relevance of the results, classification was conducted at the conceptual level rather than at the term level that is typically used by conventional text classifiers. The necessary steps for training data preparation and representation related to manufacturing supplier classification problem are delineated. The proposed classifier is capable of forming both simple and complex classes of manufacturing SMEs based on their advertised capabilities. The performance of the proposed classifier wass evaluated experimentally based on the standard metrics used in information retrieval such as precision, recall, and F-measure. It was concluded that the proposed concept-based classification technique outperforms the traditional term-based methods with respect to accuracy, robustness, and cost.
Joint Estimation of Relatedness Coefficients and Allele Frequencies from Ancient Samples
Authors: Theunert Christoph , Racimo Fernando , Slatkin Montgomery 
Published: April 2017

Abstract
Here, we develop and test a method to address whether DNA samples sequenced from a group of fossil hominin bone or tooth fragments originate from the same individual or from closely related individuals. Our method assumes low amounts of retrievable DNA, significant levels of sequencing error, and contamination from one or more present-day humans. We develop and implement a maximum likelihood method that estimates levels of contamination, sequencing error rates, and pairwise relatedness coefficients in a set of individuals. We assume that there is no reference panel for the ancient population to provide allele and haplotype frequencies. Our approach makes use of single nucleotide polymorphisms (SNPs) and does not make assumptions about the underlying demographic model. By artificially mating genomes from the 1000 Genomes Project, we determine the numbers of individuals at a given genomic coverage that are required to detect different levels of genetic relatedness with confidence.
Improving Self-Regulation for Obesity Prevention in Head Start: A Randomized Controlled Trial
Authors: Lumeng Julie C. , Miller Alison L. , Horodynski Mildred A. , Brophy-Herb Holly E. , Contreras Dawn , Lee Hannah , Sturza Julie , Kaciroti Niko , Peterson Karen E. 
Published: April 2017

OBJECTIVES:
To determine the effect of an intervention to improve emotional and behavioral self-regulation in combination with an obesity-prevention program on the prevalence of obesity and obesity-related behaviors in preschoolers.

METHODS:
This was a cluster-randomized intervention trial in Head Start (HS) classrooms conducted in each of 4 academic years from 2011 to 2015. Participants (697 children; 49% boys; mean age: 4.1 ± 0.5 years; 48% white, 30% African American, 12% Hispanic) were randomly assigned by classroom to 1 of 3 intervention arms: (1) HS + Preschool Obesity Prevention Series (POPS) + Incredible Years Series (IYS) (HS enhanced by the POPS [program targeting evidence-based obesity-prevention behaviors] and the IYS [program to improve children’s self-regulation]), (2) HS+POPS, or (3) HS. Primary outcomes were changes in prevalence of obesity, overweight/obesity, BMI z score, and teacher-reported child emotional and behavioral self-regulation; secondary outcomes were dietary intake, outdoor play, screen time, and parent nutrition knowledge and nutrition self-efficacy.

RESULTS:
HS+POPS+IYS improved teacher-reported self-regulation compared with HS+POPS (P &lt; .001) and HS (P &lt; .001), but there was no effect on the prevalence of obesity (16.4% preintervention to 14.3% postintervention in HS+POPS+IYS versus 17.3% to 14.4% in HS+POPS [P = .54] versus 12.2% to 13.0% in HS [P = .33]). There was no effect of HS+POPS compared with HS alone (P = .16). There was no effect on other outcomes except for sugar-sweetened beverage intake (HS+POPS+IYS resulted in a greater decline than HS; P = .005).

CONCLUSIONS:
An intervention for parents and children to improve HS preschoolers’ emotional and behavioral self-regulation in combination with an obesity-prevention curriculum did not reduce obesity prevalence or most obesity-related behaviors.
The Impact of the Saudization Policy on Recruitment and Retention: A Case Study of the Banking Sector in Saudi Arabia
Authors: Edgar David , Azhar Areej , Duncan Dr. Peter 
Published: April 2017

<p>To reduce unemployment and reliance on expatriate workers, the Saudi Arabian government has been implementing a Saudization programme to replace expatriates with Saudis. This has succeeded in the public sector, but not in the private sector, except in banking, which is perceived as a white-collar occupation and acceptable in Saudi society. As such, this study investigates the impact of Saudization on recruitment and retention in the banking sector to see what lessons have been learned and what action is required. A systematic literature review was conducted, followed by questionnaires with 48 branch managers, and interviews with 12 Human Resource managers of key banks.</p><p>The findings show that Saudization has an impact on several aspects of recruitment and retention in the banking sector, in particular, banks must provide specific training to Saudi recruits, revise working hours and promote the attractiveness of the post. Adopting such practices can benefit Saudi banking and contribute to the fulfillment of Saudization. </p>