1,721,249 research outputs found
Tilastollisia menetelmiä dynaamisten potilaspopulaatioiden mallintamiseen : Tapahtumahistoria-analyysia hoitoilmoitusrekisterin skitsofreenikoille
Full text linkPro gradu -tutkielma (Helsingin yliopisto, tilastotieteen laitos)ei tietoa saavutettavuudesta
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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
Modeling the volume-effectiveness relationship in the case of hip fracture treatment in Finland
No full textAbstract Background A common argument in the recent health policy debate is that treatment is more effective among care providers with large volumes. It is challenging, however, to examine the volume-effectiveness relationship empirically. Several suggestions have recently been made for methodological improvements in the examination of the volume-effectiveness relationship. The aim of this study is to develop an extended methodology for examining the volume-effectiveness relationship and demonstrate it for the case of hip fracture treatment. Methods Data consisting of 22,857 hip fracture patients from 52 hospitals in Finland in 1998-2001 were extracted from the administrative registers. The relationship between hospital and rehabilitation unit volumes and effectiveness was examined using a statistical model that allowed risk adjustments and hierarchical modeling of volume trends, developed for the purposes of this study. Four-month mortality and the alternative register-based measure of maintainability were used as effectiveness indicators. Results No clear relationship was found between hospital volume and the effectiveness of hip fracture treatment, but a novel result showing an association between the rehabilitation unit volume and effectiveness was detected. The face validity of the maintainability indicator seemed to be acceptable. Conclusions The methodological ideas presented allow for improved examination of the volume-effectiveness relationship. There are no indications that patients with hip fractures should only be treated in high-volume hospitals, though it may be beneficial to centralize the rehabilitation of hip fracture patients to specialized units.</p
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
Methodological perspectives for register-based health system performance assessment : Developing a hip fracture monitoring system in Finland
Full text linkVäitöskirja, liitteenä alkuperäisartikkelitei tietoa saavutettavuudesta
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Datan matka informaatioksi
Full text linkDatan määrä tulee varmasti edelleen kasvamaan voimakkaasti. Tutkimuksen mielessä yhä isompi osa datan käytöstä tulee olemaan toisiokäyttöä eli data on alun perin tuotettu muuhun tarkoitukseen. Tarkoituksenmukaisen käytön mahdollistamiseksi pelkän datan avaamisen lisäksi on pystyttävä tuottamaan ja välittämään riittävästi taustatietoa ja ymmärrystä datan syntyprosessista ja käyttökelpoisuudesta, mikä tulee olemaan erittäin suuri haaste
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
Hintaindeksit alkoholijuomien hintojen kehityksen mittarina
No full text(sis. aikasarjoja v. 1969-1998)ei tietoa saavutettavuudesta
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Menetelmällisiä näkökulmia rekisteriperusteiseen terveydenhuoltojärjestelmän vaikuttavuuden arviointiin
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