1,720,963 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Variations on the Author
Get PDF“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
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Radiographic evaluation of morphological alterations of mandible resulting from tooth loss
No full textOrientador: Paulo Henrique Ferreira CariaDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de PiracicabaRESUMO O tecido ósseo sofre modificações estruturais de acordo com as tensões que agem sobre ele. Na mandíbula, único osso móvel do crânio, os músculos provocam tensões durante sua movimentação na mastigação e fonação. O envelhecimento e a perda dentária podem provocar alterações morfológicas na mandíbula, com consequências clínicas. O objetivo deste trabalho foi correlacionar a espessura da cortical mandibular na região de forame mentual (FM) e ângulo goníaco (AG) e, a altura do processo coronóide (PC) com antímeros direito e esquerdo, idade, gênero, tipos faciais e cefálicos, número e local das perdas dentárias em uma amostra populacional. Para isso, foram avaliadas 240 radiografias panorâmicas de voluntários de ambos os gêneros, com idades entre 21 e 80 anos. Após as medidas faciais e cefálicas, as radiografias panorâmicas foram fotografadas e transferidas para o programa Radiocef Studio 2® no módulo Radio Imp.As mensurações foram realizadas por um único avaliador em três momentos distintos nas seguintes regiões: base mandibular até a borda superior da imagem da cortical mandibular na região do forame mentual, altura dos processos coronóides e espessura da cortical na região do ponto goníaco, todos bilateralmente. As medidas foram submetidas à análise estatística Anova Two Way Analasys pelo software SigmaStat®, com nível de significância de 5%. Observou-se diferença estatística significante em relação ao gênero, idade, tipo cefálico, número e local das perdas dentárias quando correlacionadas às mensurações avaliadas. Não houve diferença estatística quando correlacionados os diferentes tipos faciais e os lados direito e esquerdo de pacientes do mesmo gênero. Conclui-se que perdas dentárias provocam alterações na morfologia óssea mandibular. Além disso, fatores como idade, gênero e tipo cefálico também devem ser levados em consideração na análise da morfologia óssea mandibularABSTRACT The bone tissue undergoes structural changes according to the mechanical forces acting on it. In the mandibular bone, the lower teeth and muscles produce significant tension in the process of chewing and speech. Since the mandibular bone presents the dental arch and insertion of masticatory muscles, the aim of this study was to correlate the mandibular cortical thickness in the region of the mental foramen (MF) and gonial angle (GA) and the height of the coronoid process (CP) with right and left sides, age, gender, cephalic and facial types and number and location of tooth loss. The study population comprised 240 patients of both genders, age ranged from 21-80 years.After the facial and cephalic measures, all panoramic radiographs were photographed and imported to the program Radiocef Studio 2®in Radio Imp module, and the measurements were carried out by a single examiner in three distinct moments in the following regions: the mandibular basis up to the top edge of the mandibular cortical in the region of the mental foramen on both sides, height of both coronoid process and cortical thickness in the region of gonial point bilaterally. All measures were statistically analyzed by two?way ANOVA using the SigmaStat®software, with significance level of 5%.It was observed statistically significant differences in relation to gender, age, cephalic type, number and location of tooth loss as they were correlated to measurements assessed. There was no statistical difference by correlating different facial types and the right and left sides of the same gender patients. It was concluded that tooth loss causes changes in mandibular bone morphology. Furthermore, factors such as age, gender and cephalic type must also be taken into account in the analysis of mandibular bone morphologyMestradoRadiologia OdontologicaMestre em Radiologia Odontológic
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Correlation of the pharyngeal space with the morphology of the mandible and hyoid bone in patients with different facial types and skeletal classes
Get PDFOrientador: Francisco Haiter NetoTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de PiracicabaResumo: O sistema estomatognático é constituído por tecidos e órgãos que desempenham funções importantes como respiração, mastigação, deglutição e fonação. Uma função respiratória deficiente pode influenciar negativamente o desenvolvimento craniofacial, gerando alterações na morfologia e no mecanismo de ação do espaço faríngeo, da mandíbula e do osso hioide. A correlação entre estas estruturas não está claramente elucidada na literatura, necessitando-se assim de mais informações acerca do assunto. Desse modo, o objetivo neste trabalho foi avaliar o volume do espaço faríngeo e sua correlação com a morfologia da mandíbula e o osso hioide em pacientes com diferentes tipos faciais e classes esqueléticas. Além disso, outro objetivo foi desenvolver uma fórmula para estimar o volume do espaço faríngeo a partir de medidas lineares. Assim, foram selecionadas, 161 imagens de tomografia computadorizada de feixe cônico adquiridas no aparelho i-CAT Next Generation®. Dessas imagens, 80 eram de indivíduos do sexo masculino e 81 de indivíduos do sexo feminino, com idades entre 21 e 58 anos. A classe esquelética e o tipo facial foram determinados para cada paciente, a partir de reconstruções multiplanares, utilizando-se o software NemoCeph®. Dezessete medidas lineares e angulares foram realizadas com o software Carestream 3D Imaging® 3.4.3, enquanto a análise volumétrica do espaço faríngeo foi realizada por meio da ferramenta de segmentação semiautomática do software Insight ITK -SNAP® 2.4.0. O software MedCalc Statistical® 15.8 foi utilizado para as análises estatísticas Coeficiente de correlação intraclasse, ANOVA, Tukey, correlação de Pearson e regressão linear. Foram observadas diferenças estatisticamente significantes entre as diferentes classes esqueléticas nas mensurações Ângulo transverso da mandíbula, Distância ântero-posterior da mandíbula, Distância látero-lateral da mandíbula, Distância ântero-posterior da vértebra C2, Distância látero-lateral da epiglote, Menor distância do espaço faríngeo e Volume do espaço faríngeo. Em relação aos diferentes tipos faciais, as mensurações Distância látero-lateral do osso hioide, Ângulo transverso da mandíbula, Ângulo ântero-posterior da mandíbula, Distância ântero-posterior da vértebra C2, Distância ântero-posterior da epiglote e Menor distância do espaço faríngeo mostraram diferenças estatisticamente significantes. Houve correlação significativa entre o volume do espaço faríngeo e as medidas realizadas, com exceção às mensurações de Ângulo transverso do osso hioide, Distância látero-lateral do osso hioide, Ângulo transverso da mandíbula, Ângulo ântero-posterior da mandíbula e Distância espinha nasal anterior - espinha nasal posterior. O modelo de regressão linear realizado para predizer o volume do espaço faríngeo obteve um R2 de 0.8362. Concluiu-se que houve correlações significativas entre o volume do espaço faríngeo e as mensurações na mandíbula e no osso hioide, recomendando-se que o sistema estomatognático seja avaliado de uma maneira integral e isolada. Além disso, foi possível desenvolver um modelo de regressão linear com precisão, o que resultou em uma fórmula útil para a predição do volume do espaço faríngeoAbstract: The stomatognathic system consists on tissues and organs that perform important functions such as breathing, chewing, swallowing and phonation. Deficient respiratory function may affect the craniofacial development, leading to changes in the morphology and mechanism of action of the pharyngeal space, mandible and hyoid bone. The correlation between these structures is not clearly elucidated in the literature, requiring further information about this subject. The aim of this study was to evaluate the volume of the pharyngeal space and its correlation with mandible and hyoid bone in patients with different facial types and skeletal classes. In addition, another objective was to develop a formula to determine the volume of the pharyngeal space using only linear measurements. Thus, 161 cone-beam computed tomography images, acquired on the i-CAT Next Generation® device. Out of these images, 80 belonged to males and 81 belonged to females, aged between 21 and 58 years. The skeletal class and facial type were determined for each patient from multiplanar reconstructions using NemoCeph® software. Seventeen linear and angular measurements were performed with the Carestream 3D Imaging® Software 3.4.3, while a volumetric analysis of the pharyngeal space was performed using the semiautomatic segmentation tool of the Insight ITK-SNAP® 2.4.0 software. MedCalc Statistical® software in version 15.8 was used for Intraclass correlation coefficient, ANOVA, Tukey, Pearson's correlation and linear regression analyzes. Statistically significant differences were observed between the different skeletal classes in the Transverse Angle of Mandible, Anterior-Posterior angle of Mandible, Latero-Lateral distance of Mandible, Anterior-Posterior distance of airway space in the region of C2 vertebra, Latero-Lateral distance of airway space in the region of Epiglottis, Shortest Distance of the pharyngeal space and Pharyngeal Space Volume. In relation to the different facial types, Latero-Lateral distance of Hyoid Bone, Transverse Angle of Mandible, Anterior-Posterior distance of Mandible, Anterior-Posterior distance of the airway space in the region of C2, Anterior-Posterior distance of the airway space in the region of Epiglottis and Shortest Distance of the pharyngeal space showed statistically significant differences. There was a statistically significant correlation between the Pharyngeal Space Volume and all the measurements, with exception of the Transverse Angle of Hyoid Bone, Latero-Lateral distance of Hyoid Bone, Anterior-Posterior distance of Mandible, Transverse Angle of Mandible and Anterior Nasal Spine¿Posterior Nasal Spine Distance. The linear regression model used to predict the pharyngeal space volume obtained an R2 of 0.8362. It was concluded that there were significant correlations between the pharyngeal space volume and the mandible and hyoid bone measurements, suggesting that the stomatognathic system should be evaluated in an integral and isolated way. Furthermore, it was possible to develop a linear regression model with precision, resulting in a useful formula for predicting the volume of the pharyngeal spaceDoutoradoRadiologia OdontologicaDoutor em Radiologia OdontológicaCAPE
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
