1,720,983 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
Statistical approaches to explore clinical heterogeneity in psychosis
No full textPsychotische stoornissen tonen een zeer heterogeen klinisch beeld; iets wat vaak over het hoofd wordt gezien. Doel van dit proefschrift is om inzicht te krijgen in de heterogeniteit, stabiliteit en familiaire kwetsbaarheid van mensen met een psychose en hun broers/zussen.Om deze heterogeniteit en stabiliteit aan te tonen werd gebruikt gemaakt van classical clustering, linear, generalized linear mixed effects en group-based trajectory modeling (GBTM). Wat betref heterogeniteit, lieten we zien dat Duda en Hart de geschikte index is om cluster te identificeren. Daarmee bevestigden wij eerder studie over cognitieve subtypes vanuit het GROUP-project. Vervolgens toonden we de waarde van deze subtypes aan in de loop van de stoornis met behulp van GBTM. Stabiliteit bleek een belangrijk kenmerk bij cognitie te zijn, maar niet bij negatieve symptomen. Familiaire kwetsbaarheid kwam tot uiting in cognitie ( siblings presteerden tussen controles en patiënten), in somatische comorbiditeit (risico voor siblings lag ook tussen beide) en in psychotische belevingen (meer aanwezig bij siblings dan bij controles). Binnen dit proefschrift werd een aantal verschillende predictoren geïdentificeerd. Het cognitieve profiel van de patiënten voorspelden de cognitie van siblings. Bovendien bleek de Theory of Mind bij siblings een voorspeller voor psychotische belevingen, drie jaar later. Negatieve symptomen voorspelden functioneren in de tijd. Bij multimorbiditeit bleek familiaire kwetsbaarheid de belangrijkste voorspeller. Tenslotte was migratie de belangrijkste risicofactor voor duur van de onbehandelde psychose.Concluderend, heterogeniteit bij psychosen is een klinisch relevant concept. Subtypering van patiënten opent nieuwe wegen naar inzicht en behandeling van mensen met een psychose.Psychotic disorders display a very heterogeneous presentation which is often overlooked. Main aim of this thesis is to explore the heterogeneity, stability and familial liability in psychotic patients and their unaffected siblings. Classical clustering, linear, generalized linear mixed effects and group-based trajectory modeling (GBTM) techniques were applied to dissect heterogeneity and stability.On heterogeneity, we confirmed previous work on cognitive subtypes within the GROUP-project, by demonstrating that Duda and Hart was indeed the best performing index to identify homogenous clusters. Heterogeneity of cognition and negative symptoms was validated in the course of the disease by using GBTM, yielding clinical relevant subtypes. Stability of these subtypes turned out to be key feature for cognition, but not for negative symptoms. Familial liability was reflected in cognition (siblings performing between healthy controls and patients), in somatic diseases (the risk for siblings being in between likewise) and in psychotic experiences (to be more prevalent in siblings than in controls).Within the framework of this thesis various predictive factors were identified. The cognitive profiles of patients predicted siblings’ cognitive performance. Also, good Theory of Mind in siblings predicted milder psychotic experiences, 3 years later. For negative symptoms, subtypes were strong predictors of outcomes over time. For multimoribidity, familial liability is the major determinants. Additionally, the highest risk for long duration on being untreated was migration.In conclusion, heterogeneity in psychosis is a clinical relevant concept. Subtyping patients provides new avenues to better understanding and more effectively treating people with psychosis in a personalized manner
Statistical approaches to explore clinical heterogeneity in psychosis
Full text linkPsychotische stoornissen tonen een zeer heterogeen klinisch beeld; iets wat vaak over het hoofd wordt gezien. Doel van dit proefschrift is om inzicht te krijgen in de heterogeniteit, stabiliteit en familiaire kwetsbaarheid van mensen met een psychose en hun broers/zussen.Om deze heterogeniteit en stabiliteit aan te tonen werd gebruikt gemaakt van classical clustering, linear, generalized linear mixed effects en group-based trajectory modeling (GBTM). Wat betref heterogeniteit, lieten we zien dat Duda en Hart de geschikte index is om cluster te identificeren. Daarmee bevestigden wij eerder studie over cognitieve subtypes vanuit het GROUP-project. Vervolgens toonden we de waarde van deze subtypes aan in de loop van de stoornis met behulp van GBTM. Stabiliteit bleek een belangrijk kenmerk bij cognitie te zijn, maar niet bij negatieve symptomen. Familiaire kwetsbaarheid kwam tot uiting in cognitie ( siblings presteerden tussen controles en patiënten), in somatische comorbiditeit (risico voor siblings lag ook tussen beide) en in psychotische belevingen (meer aanwezig bij siblings dan bij controles). Binnen dit proefschrift werd een aantal verschillende predictoren geïdentificeerd. Het cognitieve profiel van de patiënten voorspelden de cognitie van siblings. Bovendien bleek de Theory of Mind bij siblings een voorspeller voor psychotische belevingen, drie jaar later. Negatieve symptomen voorspelden functioneren in de tijd. Bij multimorbiditeit bleek familiaire kwetsbaarheid de belangrijkste voorspeller. Tenslotte was migratie de belangrijkste risicofactor voor duur van de onbehandelde psychose.Concluderend, heterogeniteit bij psychosen is een klinisch relevant concept. Subtypering van patiënten opent nieuwe wegen naar inzicht en behandeling van mensen met een psychose.Psychotic disorders display a very heterogeneous presentation which is often overlooked. Main aim of this thesis is to explore the heterogeneity, stability and familial liability in psychotic patients and their unaffected siblings. Classical clustering, linear, generalized linear mixed effects and group-based trajectory modeling (GBTM) techniques were applied to dissect heterogeneity and stability.On heterogeneity, we confirmed previous work on cognitive subtypes within the GROUP-project, by demonstrating that Duda and Hart was indeed the best performing index to identify homogenous clusters. Heterogeneity of cognition and negative symptoms was validated in the course of the disease by using GBTM, yielding clinical relevant subtypes. Stability of these subtypes turned out to be key feature for cognition, but not for negative symptoms. Familial liability was reflected in cognition (siblings performing between healthy controls and patients), in somatic diseases (the risk for siblings being in between likewise) and in psychotic experiences (to be more prevalent in siblings than in controls).Within the framework of this thesis various predictive factors were identified. The cognitive profiles of patients predicted siblings’ cognitive performance. Also, good Theory of Mind in siblings predicted milder psychotic experiences, 3 years later. For negative symptoms, subtypes were strong predictors of outcomes over time. For multimoribidity, familial liability is the major determinants. Additionally, the highest risk for long duration on being untreated was migration.In conclusion, heterogeneity in psychosis is a clinical relevant concept. Subtyping patients provides new avenues to better understanding and more effectively treating people with psychosis in a personalized manner
A Study on the SME Business of Grameenphone Ltd
No full textMobile telecommunication companies are playing a key role in communication in the current world. Grameenphone has become one of the leading companies in the mobile telecommunications industry of Bangladesh. Creating a higher image than competitors is a daunting task. Grameenphone has produced a higher image than other operators. Customer manager behaves well. GP users say Grameenphone billing rates are higher.
This report is prepared to meet the partial requirements for a Bachelor of Business Administration degree at United International University. The main objective of this report is to do a thorough analysis of SME business of Grameenphone Limited and suggest some areas for improvement. At the outset, this report highlights the purpose of the report, the motivation for the study, the scope of the study, the limitations of the study, and the significance of the study. Profile of the organization including Mission, Vision, SWOT Analysis, Porters Five Force Model, Products and Services, are given then. Then Literature Review is placed that include the relevant studies relating to SME business. Methods, data collection and analysis, interpretation and discussion are included in the third chapter.
Based on the analysis, a number of important factors have been identified which are the major factors affecting SME business of Grameenphone Limited including network coverage, customer service, pricing, internet service and employee behavior. Based on the findings of the study, several recommendations and conclusions have been made at the end of the report
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