779 resultados para online journals and databases


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Not distributed to depository libraries in a physical form, <1997-2005>; paper distribution resumes

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1. Authors' list A-Z -- 2. List of journals and topical index.

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Title from cover.

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Title from caption

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Some general and special laws bound separately.

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Published by: P.G. Philipsen, 1873-1882; A. Petersen-Studnitz, 1883-<1896>; Nordisk forlag, <1900>-1903; Nationaløkonomisk forenimg, <-1975>

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Compiled under the supervision of Henry White, Herbert McLeod, H. Forster Morley, and others. List of society publications, journals and other periodicals catalogued, with abbreviations used: v. 1, p. [xiii]-lxxviii; v. 7, p. [v]-xxxi; v. 9, p. [vii]-xxxii; v. 12, p. [vii]-xxxii; v. 13, p. [ix]-xcviii.

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No. 104-117 contain also the Regents bulletins.

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Some v. distributed to some depository libraries in microfiche, <1986-1998>

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Includes section "Recent periodicals and new books".

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Esta tese apresenta uma configuração em que, numa rede social regida pelo princípio da ligação preferencial, nós periféricos buscam inflacionar artificialmente seus índices de centralidade, medida pelo grau de entrada, por meio do privilégio temporário da reciprocidade de ligações com outros nós periféricos. Para construir este cenário, criou-se uma rede com as características de uma rede acadêmica de citações entre artigos, em que os nós são artigos publicados por um conjunto de periódicos, e as ligações entre eles são as citações que cada artigo faz a outros artigos existentes. Esta rede foi condensada em outra, na qual os nós são os periódicos aos quais cada artigo da primeira rede está associado, e as ligações são o total de citações que os artigos de um periódico faz aos artigos de cada outro periódico. Implementou-se um método de simulação computacional, no qual, durante alguns ciclos, foram manipulados parâmetros relacionados à quantidade total de ligações (citações) entre periódicos periféricos, de forma a induzir os efeitos desejados de reciprocidade periférica, alterando a lógica de direcionamento de citações pela atribuição de maior probabilidade para que artigos de outros periódicos periféricos recebessem ligações, afastando-se da lógica da ligação preferencial, porém sem alterar qualquer outra característica intrínseca que representasse a capacidade de um artigo ou periódico atrair novas ligações. Chamou-se esta alteração da lógica de alocação de ligações entre periódicos periféricos de Comportamento Estratégico. Observou-se que o Comportamento Estratégico é capaz de trazer benefícios de centralidade medida por grau para aqueles periódicos em que ele foi induzido, e prejuízos para os demais periódicos periféricos, porém não é suficiente para que eles saiam do quartil periférico de centralidade a que pertenciam antes da manipulação dos efeitos. Além disso, observou-se que, na ausência de elementos que alterem a capacidade intrínseca de atração de ligações de um periódico, a interrupção do Comportamento Estratégico levou aos níveis anteriores de centralidade. Também se observou que o Comportamento Estratégico acarretou em alterações de centralidade medida por autovetor estatisticamente significativas, porém não esperadas, mas que, após sua interrupção, esta retornou aos patamares anteriores à indução dos efeitos.

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Las revistas académico-científicas son uno de los principales canales de comunicación y difusión de los resultados de investigación. Sin embargo no todas tienen el mismo prestigio y grado de influencia en la comunidad científica. De su calidad y visibilidad dependen, en gran medida, las posibilidades de que un trabajo sea conocido, leído y citado. Esta investigación se propone determinar la visibilidad en Google Scholar de un conjunto de revistas latinoamericanas de Bibliotecología y Ciencia de la Información, y clasificarlas según su grado de visibilidad. Utilizando la aplicación Publish or Perish para recuperar las citas de las revistas se calcularon indicadores basados en la citación. Se combinaron técnicas de análisis multivariado de datos para realizar agrupamientos de revistas según su grado de visibilidad, y se elaboraron representaciones gráficas que facilitan la interpretación de los resultados y la identificación de los grupos de revistas con alta, media y baja visibilidad

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Thesis (Master's)--University of Washington, 2016-06

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In this paper, technology is described as involving processes whereby resources are utilised to satisfy human needs or to take advantage of opportunities, to develop practical solutions to problems. This study, set within one type of technology context, information technology, investigated how, through a one semester undergraduate university course, elements of technological processes were made explicit to students. While it was acknowledged in the development and implementation of this course that students needed to learn technical skills, technological skills and knowledge, including design, were seen as vital also, to enable students to think about information technology from a perspective that was not confined and limited to 'technology as hardware and software'. This paper describes how the course, set within a three year program of study, was aimed at helping students to develop their thinking and their knowledge about design processes in an explicit way. An interpretive research approach was used and data sources included a repertory grid 'survey'; student interviews; video recordings of classroom interactions, audio recordings of lectures, observations of classroom interactions made by researchers; and artefacts which included students' journals and portfolios. The development of students' knowledge about design practices is discussed and reflections upon student knowledge development in conjunction with their learning experiences are made. Implications for ensuring explicitness of design practice within information technology contexts are presented, and the need to identify what constitutes design knowledge is argued.

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Background Osteoarthritis (OA) is the most prevalent chronic joint disorder worldwide and is associated with significant pain and disability. Objectives To assess the effects of viscosupplementation in the treatment of OA of the knee. The products were hyaluronan and hylan derivatives (Adant, Arthrum H, Artz (Artzal, Supartz), BioHy (Arthrease, Euflexxa, Nuflexxa), Durolane, Fermathron, Go-On, Hyalgan, Hylan G-F 20 (Synvisc Hylan G-F 20), Hyruan, NRD-101 (Suvenyl), Orthovisc, Ostenil, Replasyn, SLM-10, Suplasyn, Synject and Zeel compositum). Search strategy MEDLINE (up to January (week 1) 2006 for update), EMBASE, PREMEDLINE, Current Contents up to July 2003, and the Cochrane Central Register of Controlled Trials (CENTRAL) were searched. Specialised journals and reference lists of identified randomised controlled trials (RCTs) and pertinent review articles up to December 2005 were handsearched. Selection criteria RCTs of viscosupplementation for the treatment of people with a diagnosis of OA of the knee were eligible. Single and double-blinded studies, placebo-based and comparative studies were eligible. At least one of the four OMERACT III core set outcome measures had to be reported (Bellamy 1997). Data collection and analysis Each trial was assessed independently by two reviewers for its methodological quality using a validated tool. All data were extracted by one reviewer and verified by a second reviewer. Continuous outcome measures were analysed as weighted mean differences (WMD) with 95% confidence intervals (CI). However, where different scales were used to measure the same outcome, standardized mean differences (SMD) were used. Dichotomous outcomes were analyzed by relative risk (RR). Main results Seventy-six trials with a median quality score of 3 (range 1 to 5) were identified. Follow-up periods varied between day of last injection and eighteen months. Forty trials included comparisons of hyaluronan/hylan and placebo (saline or arthrocentesis), ten trials included comparisons of intra-articular (IA) corticosteroids, six trials included comparisons of nonsteroidal anti-inflammatory drugs (NSAIDs), three trials included comparisons of physical therapy, two trials included comparisons of exercise, two trials included comparisons of arthroscopy, two trials included comparisons of conventional treatment, and fifteen trials included comparisons of other hyaluronans/hylan. The pooled analyses of the effects of viscosupplements against 'placebo' controls generally supported the efficacy of this class of intervention. In these same analyses, differential efficacy effects were observed for different products on different variables and at different timepoints. Of note is the 5 to 13 week post injection period which showed a percent improvement from baseline of 28 to 54% for pain and 9 to 32% for function. In general, comparable efficacy was noted against NSAIDs and longer-term benefits were noted in comparisons against IA corticosteroids. In general, few adverse events were reported in the hyaluronan/hylan trials included in these analyses. Authors' conclusions Based on the aforementioned analyses, viscosupplementation is an effective treatment for OA of the knee with beneficial effects: on pain, function and patient global assessment; and at different post injection periods but especially at the 5 to 13 week post injection period. It is of note that the magnitude of the clinical effect, as expressed by the WMD and standardised mean difference (SMD) from the RevMan 4.2 output, is different for different products, comparisons, timepoints, variables and trial designs. However, there are few randomised head-to-head comparisons of different viscosupplements and readers should be cautious, therefore, in drawing conclusions regarding the relative value of different products. The clinical effect for some products, against placebo, on some variables at some timepoints is in the moderate to large effect-size range. Readers should refer to relevant tables to review specific detail given the heterogeneity in effects across the product class and some discrepancies observed between the RevMan 4.2 analyses and the original publications. Overall, the analyses performed are positive for the HA class and particularly positive for some products with respect to certain variables and timepoints, such as pain on weight bearing at 5 to 13 weeks postinjection. In general, sample-size restrictions preclude any definitive comment on the safety of the HA class of products; however, within the constraints of the trial designs employed no major safety issues were detected. In some analyses viscosupplements were comparable in efficacy to systemic forms of active intervention, with more local reactions but fewer systemic adverse events. In other analyses HA products had more prolonged effects than IA corticosteroids. Overall, the aforementioned analyses support the use of the HA class of products in the treatment of knee OA.