bluuebunny/crossref_metadata_2025_split huggingface dataset:
An Esthetics Rehabilitation with Computer-aided Design/ Computer-aided Manufacturing Technology
Authors: Zavanelli Adriana Cristina , Mazaro José Vitor Quinelli , de Mello Caroline Cantieri , Santiago Joel Ferreira , Amoroso Andressa Paschoal 
Published: January 2015

ABSTRACT

Aim
This paper describes a case of a rehabilitation involving Computer Aided Design/Computer Aided Manufacturing (CADCAM) system in implant supported and dental supported prostheses using zirconia as framework.

Background
The CAD-CAM technology has developed considerably over last few years, becoming a reality in dental practice. Among the widely used systems are the systems based on zirconia which demonstrate important physical and mechanical properties of high strength, adequate fracture toughness, biocompatibility and esthetics, and are indicated for unitary prosthetic restorations and posterior and anterior framework.

Case description
All the modeling was performed by using CAD-CAM system and prostheses were cemented using resin cement best suited for each situation.

Conclusion
The rehabilitation of the maxillary arch using zirconia framework demonstrated satisfactory esthetic and functional results after a 12-month control and revealed no biological and technical complications.

Clinical significance
This article shows the important of use technology CAD/CAM in the manufacture of dental prosthesis and implant-supported.

How to cite this article
Mazaro JVQ, Mello CC, Zavanelli AC, Santiago JF Jr, Amoroso AP, Pellizzer EP. An Esthetics Rehabilitation with Computer-aided Design/Computer-aided Manufacturing Technology. J Contemp Dent Pract 2014;15(4): 506-512.
Aggressive Periodontitis in a Nigerian Teaching Hospital
Authors: Nwhator Solomon Olusegun , Uhunmwangho Iyobosa , Chukwuma Benedict , Ikponmwosa Osagie 
Published: January 2015

ABSTRACT

Aim
These case series were aimed at highlighting late presentations of aggressive periodontitis (AP) in a teaching hospital as well as proffering possible reasons for such presentations which would serve as part of the solution to prevent such presentations in the future.

Background
Aggressive periodontitis is a severe form of destructive periodontitis traditionally believed to present around puberty. However, many cases seen in a teaching hospital presented much later for yet-to-be explained reasons.

Case description
Seven patients referred to the specialist periodontal clinic of a Nigerian teaching hospital presented with clinical features consistent with AP. Most of the patients were over twenty and some over thirty years of age.

Conclusion
Aggressive periodontitis patients seen in our center were often outside the traditional age brackets. The range of treatment options available to the patients were under-utilized due to serious financial constraints.

Clinical significance
Aggressive periodontitis comes with serious psychological challenges and severe morbidity. Prompt diagnosis and effective management hold the key to success It is important to investigate why many of the cases seen in our center presented that late. Could be due to ignorance and poverty or could be due to failure of dentists recognize these cases and consequent misdiagnosis? Further studies are needed to answer these questions.

How to cite this article
Nwhator SO, Uhunmwangho I, Chukwuma B, Ikponmwosa O. Aggressive Periodontitis in a Nigerian Teaching Hospital. J Contemp Dent Pract 2014;15(4): 518-522.
Un archivo insomne: producción y migración de imágenes
Authors: Sánchez-Biosca Vicente 
Published: January 2015

En la primavera de 1942, un equipo de cineastas enviados por el Ministro de Propaganda nazi, Joseph Goebbels, desembarcó en el ghetto de Varsovia para rodar numerosas escenas en calles, restaurantes, baños, apartamentos, cementerio… El film fue premontado en Berlín, pero jamás exhibido. Las razones no han sido todavía esclarecidas: ¿temor de que inspiraran empatía hacia las víctimas?, ¿decisión de callar una vez la ‘solución final’ estaba en marcha?. Este film, titulado Ghetto o Asien in Mittleeuropa, fue descubierto en 1954 y, desde entonces, cineastas de la RDA y de la RFA, así como de otros países, utilizaron fragmentos de su metraje para acusar al Tercer Reich. Sin embargo, en 1998, metraje complementario fue hallado en archivos norteamericanos y en una colección privada rusa. El presente texto analiza dicho material, así como los usos distintos que, siguiendo estrategias documentales diferentes, se han hecho de él. Desde Du und mancher Kamerad (A. y A. Thorndike, 1956), pasando por Mein Kampf (E. Leiser, 1959), Le temps du ghetto(F. Rossif, 1961) hasta A Film Unfinished(Yael Hersonski, 2010), buea cantidad de estrategias han sido intentadas para hacer hablar al material a su pesar. De este modo, estas perpetrators’ imagesplantean, en realidad, todas las grandes problemáticas ligadas al archivo audiovisual: su origen en un choque de miradas, su migración incesante por el universo mediático, las emociones que provocan en sus espectadores, su conversión en memoria cultural de un tiempo y lugar desaparecidos definitivamente.
O que explica a falta de professores nas escolas brasileiras?
Authors: Pinto José Marcelino De Rezende 
Published: January 2015

É comum constatar no dia a dia das escolas a ausência de professores habilitados para atuar em um conjunto de disciplinas. A decorrência natural dessa constatação, do ponto de vista das políticas públicas, é a ampliação da oferta de cursos de formação de professores, inclusive nas modalidades de Educação a Distância (EAD). Este estudo teve como objetivo avaliar se a ausência de professores nas escolas decorre da falta de professores formados, ou do desinteresse dos licenciados em lecionar. Tendo por base os dados de concluintes nos cursos de licenciatura nos últimos 20 anos, levantados pelo INEP, e considerando uma estimativa de demanda de professores por disciplina, constata-se que, com exceção da disciplina de física, existem professores habilitados em número mais do que suficiente para assumir as turmas existentes, concluindo-se que se trata essencialmente de um problema de falta de atratividade da carreira docente. Analisando-se as vagas oferecidas, conclui-se também que somente a oferta pública seria plenamente suficiente para atender a demanda em todos os componentes curriculares, bastando, para tanto desenvolver políticas que estimulassem o preenchimento dessas vagas e a conclusão com êxito dos ingressantes.
COMPARAÇÃO DE DUAS METODOLOGIAS DE APURAÇÃO DO CUSTO DE CAPITAL DAS DISTRIBUIDORAS DE ENERGIA ELÉTRICA BRASILEIRAS
Authors: Vancone Carvalhaes Marina , Aparecido de Albuquerque Andrei , Mendes da Silva Denise 
Published: January 2015

O presente trabalho buscou comparar o custo de capital apurado por um dos métodos tradicionais da Teoria de Finanças e aquele estimado pela ANEEL (Agência Nacional de Energia Elétrica), por meio da investigação dos fatores que podem levar a possíveis variações. Trata-se de uma pesquisa básica, bibliográfica e documental, com abordagem quantitativa. O estudo baseou-se na comparação do WACC (Weight Average Cost of Capital – Custo Médio Ponderado de Capital) obtido para as maiores empresas distribuidoras de energia elétrica brasileiras dos cinco maiores grupos econômicos, de acordo com o Market Share, em oito trimestres analisados, entre o início de 2010 e o final de 2011, conforme os diferentes métodos. Os resultados mostraram que há discrepância entre os métodos estudados. Destacam-se, também, ocorrências de diferentes comportamentos entre as empresas analisadas. Os dados apurados pela metodologia da ANEEL mostraram-se mais constantes, pois suas variáveis estiveram sujeitas a menos variações. Entretanto, o método tradicional, apesar de estar exposto a maiores oscilações entre os períodos, reportou um comportamento mais parecido com o real.
Eduardo Lourenço e a terceira margem do Brasil: um olhar português sobre o sertão
Authors: Polese Edna Da Silva , Koehler Jaqueline 
Published: January 2015

O olhar português sobre o Brasil incita nosso imaginário, seja sobre questões iluminadoras ou ressentidas entre as duas nações. Vários ensaios de Eduardo Lourenço na obra A nau de Ícaro debruçam-se sobre essas questões. Dentre essas, a leitura de “Guimarães Rosa e o terceiro sertão” proporciona esse olhar do crítico português inicialmente sobre um momento considerado fundamental para a independência de nossa literatura: a semana de Arte Moderna de 1922. Adiante, relaciona esse acontecimento a obras fundamentais que focam o espaço conhecido como sertão, misto de espaço físico e construção imaginária-simbólica. Será na obra de Guimarães Rosa que essa construção será conduzida à hora zero, termo do utilizado pelo crítico para anunciar a importância da obra roseana.
O uso das usinas hidrelétricas como uma energia renovável
Authors: Freitas Tessarolo Pedro Henrique , Grego Nuss Artur Eugenio , De Almeida Tabachini Guilherme , Barros Negrão Pedro Henrique 
Published: January 2015

Esta tese tem o objetivo de demonstrar os elementos que constituem a forma de energia renovável utilizadas por uma usina hidrelétrica. De forma a demonstrar como pode atuar sobre o meio ambiente, destacando os pontos de vista positivos e negativos, as implantações e as decorrentes tem como objetivo deixar claro as vantagens e desvantagens desta forma eficiente e renovável de se produzir energia. Assim verificando a utilização das usinas hidrelétricas de forma não degradante ao meio ambiente. Os procedimentos metodológicos usados foram pesquisa bibliográfica e documental.
Management of acquired haemophilia A
Authors: Scharf R. E. , Dobbelstein C. , Werwitzke S. , Tiede A. 
Published: January 2015

SummaryAcquired haemophilia A (AHA) is caused by autoantibody inhibitors of coagulation factor VIII (FVIII : C). Recent onset of bleeds and isolated prolongation of the activated partial thromboplastin time (aPTT) are characteristic features of the disorder. Reduced FVIII : C activity and a detectable FVIII : C inhibitor in the Bethesda assay confirm the diagnosis. Patients should be referred to expert centres, whenever possible, and invasive procedures with a high risk of bleeding must be avoided, until haemostasis has been secured by adequate therapy.Bypassing agents capable of inducing sufficient thrombin formation in the presence of FVIII : C inhibitors are treatment of choice, including currently available recombinant factor VIIa (NovoSeven™) and activated prothrombin complex concentrate (FEIBA™). These agents represent first line therapy to control acute or severe bleeds. To eradicate inhibitors, immunosuppressive treatment (IST) is indicated in patients with AHA. Glucocorticoids, cytotoxic agents and rituximab are most widely used. However, an ideal IST regimen has not been established so far. Adverse events of IST, including infections as the foremost cause death, are frequent complications in AHA.
Las referencias recíprocas entre el Tribunal Europeo y la Corte Interamericana de Derechos Humanos: ¿de la influencia al diálogo?
Authors: Groppi Tania , Lecis Cocco-Ortu Anna Maria 
Published: January 2015

El artículo intenta aclarar los resultados de una investigación empírica sobre las referencias o citas recíprocas entre el Tribunal Europeo de Derechos Humanos (TEDH) y la Corte Interamericana de Derechos Humanos (Corte IDH), reconocibles en la motivación de sus resoluciones. Muchos estudios han destacado que el uso de precedentes extranjeros (o «extrasistémicos») no se limita a los Tribunales nacionales, sino afecta también a los Tribunales internacionales. Sin embargo, es frecuente un abuso de la apelación al «diálogo judicial» para estas prácticas: además, faltan datos empíricos completos y normalmente se encuentran algunos ejemplos bastante casuales.El artìculo presenta los resultados de una investigaciòn extensa y completa sobre las decisiones de los dos Tribunales en los años 1987-2012, para verificar si verdaderamente hay algún diálogo entre los dos sistemas. La investigaciòn sigue el metodo ya experimentado en estudios empíricos sobre el uso de precedentes extranjeros para los tribunales constitucionales, que está integrado al mismo tiempo para un análisis cuantitativo y cualitativo. La investigación no muestra evidencias de un verdadero diálogo entre las dos instituciones, sino de una convergencia jurisprudencial en varias materias.The article aims to analyze the mutual references made in their judgments by the European Court of Human Rights and the Inter-american Court of Human Rights.Previous studies on circulation of foreign precedents have been showing that the use of foreign or «extra-systemic» precedents is not a phenomenon limited to national courts, but does also affect international courts. Nontheless, the notion of «judicial dialogue» is often abused, and the interactions between courts are hardly proved through empirical data but rather through seldom examples.The article presents the results of a general and systemic research on the case-law of the two courts in the period between 1987 and 2012, to verify if there is some kind of «judicial dialogue» or «cross-fertilization» between the two systems. The research follows the methodology previously applied in empirical studies on the use of foreign precedents by constitutional courts, which consists of both a quantitative and a qualitative analysis.The research did not show any evidence of the existence of a real «dialogue» between the two courts, but rather of a «convergence» among their jurisprudence in several fields.
Análisis psicométrico de una escala de percepción sobre la utilidad de Moodle en la universidad
Authors: Olmos-Migueláñez Susana , Martínez-Abad Fernando , Torrecilla-Sánchez Eva María , Mena-Marcos Juanjo 
Published: January 2015

Dada la	importancia que los entornos virtuales de aprendizaje (learning	management systems) han adquirido en la educación superior, y la	generalización en el empleo de la plataforma Moodle en muchas	instituciones universitarias, se diseña y se validan las cualidades	psicométricas de una escala de utilidad percibida sobre el uso de Moodle. Se pretende aportar un instrumento válido y fiable que	permita comprobar cuál es la percepción de los estudiantes sobre la	utilidad de Moodle. De la población de estudiantes universitarios	del ámbito de las Ciencias de la Educación, se obtiene una muestra de	754 sujetos. Los resultados manifiestan que la escala evalúa,	adecuadamente, la utilidad de la plataforma en cinco dimensiones:	contenidos, actividades, evaluación, interacción y aprendizaje.	Finalmente, se discute sobre la utilidad de la escala para evaluar la	utilidad de Moodle y para la implementación de procesos de mejora	de su empleo en las instituciones de Educación Superior.
Las revistas mexicanas de investigación educativa rumbo a la corriente principal de difusión de la ciencia
Authors: Cabrera-Flores Mayer , Luna Edna , Vidauri Gabriela 
Published: January 2015

El propósito de este estudio es analizar el caso de la Revista Electrónica de Investigación Educativa (REDIE) en su trayecto rumbo a la corriente principal de difusión científica. Para ello, presenta la evolución de la política mexicana sobre las revistas, la situación de las revistas mexicanas de investigación educativa, y profundiza sobre la REDIE. En esta evolución se identificaron tres momentos: estandarización de los criterios de calidad, digitalización y acceso abierto de las revistas científicas, en los que confluyen instancias como REDALYC y LATINDEX y las iniciativas individuales de revistas que impulsan el desarrollo de la difusión científica del país. Se concluye sobre la necesidad de lograr la coincidencia en los esfuerzos de los diversos actores: organismos gubernamentales, instituciones y comunidades académicas.
Non‐Volatile Analog Control and Reconfiguration of a Vortex Nano‐Oscillator Frequency
Authors: Stebliy Maksim , Jenkins Alex , Benetti Luana , Paz Elvira , Ferreira Ricardo 
Published: August 2024

AbstractMagnetic tunnel junctions are nanoscale devices that have recently attracted interest in the context of frequency multiplexed spintronic neural networks, due to their interesting dynamical properties, which are defined during the fabrication process, and depend on the material parameters and geometry. This work proposes an approach to extending the functionality of a standard magnetic tunnel junction (MTJ) by introducing an additional ferromagnet/antiferromagnet (FM/AFM) storage layer (SL) vertically integrated with the standard vortex MTJ stack into the nanopillar. The magnetostatic field created by this storage layer acts on the free layer and can be used to change its static and dynamic properties. To tune the magnitude and direction of this magnetostatic field, magnetic reconfiguration is carried out through a thermally assisted switching mechanism using a voltage pulse that heats the AFM layer in the SL above the Néel temperature in the presence of an external field. It is experimentally shown that using an MTJ based on a 600 nm diameter nanopillar with a vortex in the free layer, reconfiguration of the SL allows to continuously change the core precession frequency in the 15 MHz range, or ≈10% of the device frequency.
Aerogel Fibers Made via Generic Sol‐Gel Centrifugal Spinning Strategy Enable Dynamic Removal of Volatile Organic Compounds From High‐Flux Gas
Authors: Wen Zhu , Lyu Jing , Ding Yafei , Liu Bin , Zhang Xuetong 
Published: August 2024

AbstractAerogels with ultrahigh porosity and large specific surface area have demonstrated great potential for capturing volatile organic compounds (VOCs). Especially, aerogel fiber aggregates with macropores formed by overlapping aerogel fibers and mesopores in the aerogel fibers might realize fast sorption kinetics and high sorption capacity simultaneously. However, how to develop fast fabrication and large‐scale production of aerogel fibers remains a challenge. Herein, a generic sol‐gel centrifugal spinning (SCS) strategy with a spinning rate capable of reaching 700 m min−1 is developed for producing aerogel fibers. The representative SCS aerogel fiber made from aramid nanofiber (ANF) dispersion exhibits a large specific surface area (313 m2 g−1) and high tensile strength (12.48 MPa). The SCS strategy is further applied to fabricate various kinds of aerogel fibers, including sodium alginate, cellulose, and chitosan. The ANF aerogel fiber aggregates exhibit superior VOC adsorption capacity of 438.0 mg g−1 under an ultrafast gas flux of 3.8 × 104 L m−2 h−1, which also has satisfactory cyclic stability. This work not only develops a powerful and generic strategy for fabricating aerogel fibers in large scale, but also provides inspiration for applying these SCS aerogel fibers in dynamic removal of VOCs and other environmental protection fields.
Chimie Douce Derived Novel P2‐Type Layered Oxide for Potassium‐Ion Batteries
Authors: Jha Pawan Kumar , Golubnichiy Alexander , Sachdeva Dorothy , Banerjee Abhik , Sai Gautam Gopalakrishnan , Fichtner Maximilian , Abakumov Artem M. , Barpanda Prabeer 
Published: August 2024

AbstractThe emergence of K‐ion batteries (KIBs) heralds a promising frontier in energy storage technology, offering the potential for high specific energy density, long cycle life, and robust power capabilities, all while utilizing the abundant resources of potassium. In response to the challenges posed by synthetic intricacies related to K‐based cathodes, the effort is directed toward employing soft chemistry (chimie douce) method to unveil a hitherto‐unknown P2‐type K1/3Co1/3Mn2/3O2 (KCM) layered oxide cathode for KIBs. Comprehensive analysis using diffraction, microscopy, and spectroscopy tools reveals the ion exchange reaction proceeds through overlay ordered structure formation mechanism. The as‐prepared KCM material serves as a ≈2.9 V positive K+ insertion host. Further, it showcases an exceptional structural reversibility, robust cycling performance with ≈100% coulombic efficiency even after 100 cycles, and maintaining electrochemical stability even at elevated temperature (c.a. 40° and 50 °C). The KCM cathode exhibits in‐plane Co–Mn ordering and solid‐solution redox mechanism during (de)potassiation. Combining first‐principles calculations with experimental tools, this research demonstrates the efficacy of ambient ion‐exchange route in stabilizing promising cathode materials for KIBs. This innovative synthetic approach not only streamlines synthetic complexities, but also holds significant implications for the advancement of KIB technology for stationary energy storage.
Ru Doped Ir Nanowires for High‐Efficient and Durable Proton Exchange Membrane Water Electrolyzers
Authors: Pang Bingqian , Feng Suyang , Xu Yueshan , Chen Hui , Li Jing , Yuan Yuliang , Zou Xiaoxin , Tian Xinlong , Kang Zhenye 
Published: August 2024

AbstractLong‐term operation of proton exchange membrane water electrolysis (PEMWE) poses significant challenges due to the high potential and strong acidic environment associated with the oxygen evolution reaction (OER), leading to severe catalyst degradation. Here, ultrafine iridium–ruthenium nanowires (IrRu NWs) are developed through a facile process, which exhibits excellent activity and stability for acidic OER. The IrRu NWs achieve an overpotential of 243 mV at 10 mA cm−2, which is significantly lower than that of commercial IrO2 and pure Ir nanowires. Importantly, the IrRu NWs demonstrate 17.6% higher current density at 2 V in real PEMWE device than that of the commercial IrO2 and Pt/C catalysts at the anode and cathode, respectively. The PEMWE device with the IrRu NWs catalyst layers can be stably operated at 1.0 and 1.5 A cm−2 for more than 500 h with a degradation rate of only 28 µV h−1, which makes the IrRu NWs a promising catalyst toward PEMWE applications.
Exciton Dissociation and Recombination Afford Narrowband Organic Afterglow Through Efficient FRET
Authors: Zhang Jingyu , Wang Wuji , Bian Yanfang , Wang Yike , Lu Xinchi , Guo Zhenli , Sun Chengxi , Li Zecai , Zhang Xiao , Yuan Jie , Tao Ye , Huang Wei , Chen Runfeng 
Published: August 2024

AbstractOrganic afterglow with long‐persistent luminescence (LPL) after photoexcitation is highly attractive, but the realization of narrowband afterglow with small full‐width at half‐maximum (FWHM) is a huge challenge since it is intrinsically contradictory to the triplet‐ and solid‐state emission nature of organic afterglow. Here, narrow‐band, long‐lived, and full‐color organic LPL is realized by isolating multi‐resonant thermally activated delayed fluorescent (MR‐TADF) fluorophores in a glassy steroid‐type host through a facile melt‐cooling treatment. Such prepared host becomes capable of exciton dissociation and recombination (EDR) upon photoirradiation for both long‐lived fluorescence and phosphorescence; and, the efficient Förster resonance energy transfer (FRET) from the host to various MR‐TADF emitters leads to high‐performance LPL, exhibiting small FWHM of 33 nm, long persistent time over 10 s, and facile color‐tuning in a wide range from deep‐blue to orange (414–600 nm). Moreover, with the extraordinary narrowband LPL and easy processability of the material, centimeter‐scale flexible optical waveguide fibers and integrated FWHM/color/lifetime‐resolved multilevel encryption/decryption devices have been designed and fabricated. This novel EDR and singlet/triplet‐to‐singlet FRET strategy to achieve excellent LPL performances illustrates a promising way for constructing flexible organic afterglow with easy preparation methods, shedding valuable scientific insights into the design of narrow‐band emission in organic afterglow.