1,354,928 research outputs found
A real-time analysis of a transplantation program with a personal computer
No full textThis study concerns the use of commercial software (a spreadsheet combined with database and graphic functions) to analyze data on kidney transplantation. The program consists of a section containing (macro) instructions, a section for entering data, a database, a set of spreadsheets (one for each field) with which the statistical calculations and summary tables are executed, and a set of diagrams for the final visual output. Three kinds of data are made available: descriptive statistics, actuarial survival rates, and risk factor evaluation. The program can analyze the importance of the variables considered and estimate the effect of a therapeutic or diagnostic maneuver
β2-Microglobulin and low-flux synthetic dialyzers
No full textThe aim of this study was to compare the effect on β2-microglobulin (β2-M) plasma levels of dialyzers with 3 low-flux synthetic membranes and regenerated cellulose (Cuprophan) in 12 chronic dialysis patients. The Synthetic membrane materials chosen were low-flux polymethylmethacrylate (PMMA), low-flux polysulfone (PS 400), and polycarbonate-polyether (Gambrane). Adequate and comparable removal of small solutes was provided by dialyzers with all 4 membrane materials used under similar conditions. A significant reduction of β2-M plasma levels was seen only with Gambrane while the other 2 synthetic membrane materials gave rise to increases similar to those known to occur with Cuprophan. After correction for the hemoconcentration caused by ultrafiltration, dialysis with Gambrane showed a 24% lower plasma β2-M level while the β2-M concentrations with the other 3 membrane materials were practically unchanged. In addition, the efficiency of Gambrane dialyzers in β2-M removal was able to significantly lower the predialysis plasma β2-M levels after only 5 dialysis sessions. The hemocompatibility of the 3 synthetic low-flux membranes as judged by the white blood cell (WBC) count and complement activation was similar and therefore cannot be used to explain the different β2-M plasma levels. In anticipation of gaining further insight into the mechanisms of accumulation and deposition of β2-M in dialysis patients, a worthwhile approach may be to use a low-flux membrane such as Gambrane which combines removal with protection against potential activating factors in the dialysis fluid
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Grafitos: Crecimiento organizado de un emprendimiento familiar
No full textGRAFITOS es una marca de tejidos infantiles creada por la familia Stefoni - Kellemberger en 2001, luego de realizar durante 8 años trabajos para terceros. Desde un comienzo la marca enfocó su negocio a la producción y venta a comercios minoristas de prendas tejidas para bebés y niños en las provincias de Santa Fe, Córdoba, Entre Ríos y Buenos Aires.
Como puede ser normal en los emprendimientos familiares que avizoran un crecimiento, el negocio comienza a desorganizarse y a cometer errores. El motivo del presente trabajo será dar solución a los problemas mencionados, para luego plantear un horizonte de crecimiento que permita a GRAFITOS establecerse como la marca de prendas tejidas para bebés y niños mas especializada y de mejor calidad a nivel nacional.Stefoni, Andrés. Universidad Nacional de Rosario. Facultad de Ciencias económicas y Estadística. Argentin
Physical activity and renal transplantation
No full textA sedentary lifestyle is an important risk factor leading to cardiovascular disease. Cardiovascular disease is particularly frequent in kidney transplant recipients, with a mortality rate of 38%. In this population, besides the classic risk factors (genetics, age, smoking, etc.) and disease-related factors (chronic renal failure, dialysis vintage) there are the side effects of immunosuppressive therapy such as diabetes and metabolic syndrome. Despite the general advice given on an appropriate lifestyle, most transplanted patients lead a sedentary life which may result in overweight. In this study the physiopathological effects of a sedentary lifestyle were analyzed with reference to the recent literature regarding the efficacy of physical activity in transplanted patients. Studies in the general population have demonstrated the beneficial effect of physical activity on the prevention of cardiovascular disease. There are only few studies within the kidney transplant population regarding regular physical activity and these studies were performed with heterogeneous protocols and different observation periods, and are therefore difficult to compare. Overall, positive results in terms of maximal aerobic capacity, muscle strength and perception of well-being have been obtained in the short and medium term (1 year). Further studies are necessary to verify the effect of physical activity on long-term patient and graft survival. In order to enhance physical activity in transplanted patients, local programs in collaboration with sports rehabilitation centers are to be recommended
Contemporary controversies in the argentine jounalism. Policy knots and professional status debate (2009-2011)
No full textEste artículo se propone dar cuenta de los posicionamientos, caracterizaciones y normatividades que los periodistas argentinos ensayaron y pusieron a prueba en el espacio público a propósito de la controversia sobre el compromiso político en el periodismo. Retomando los trabajos que dieron lugar a la perspectiva sociológico-pragmática francesa (Latour, Boltanski y Lemieux), buscará dar cuenta de los elementos nodales de la controversia y las formas de resolver los argumentos en las situaciones y contextos de su emergencia. El despliegue de la controversia pondrá de manifiesto, finalmente, los marcos valorativos que les permiten a los periodistas actuar de acuerdo a la lógica de la actividad y a su sentido de justicia.This article intends to give an account of the positions, characterizations and normativities that Argentine journalists rehearsed and tested in the public space, about the controversy over political commitment in journalism. Resuming the works that led to the pragmatic- sociological French perspective (Latour, Boltanski and Lemieux), will seek to clarify nodal elements of the controversy and the ways to resolve the arguments in situations and contexts of its emergency. The deployment of the controversy will show, finally, evaluative frameworks that allow journalists act according to the logic of the activity and its sense of Justice.Fil: Stefoni, Jorge Andrés. Universidad Nacional de la Plata. Facultad de Humanidades y Ciencias de la Educacion; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Investigaciones en Humanidades y Ciencias Sociales; Argentin
Variations on the Author
No full text“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
Recipient predictors for developing delayed graft function (DGF). A paired kidney analysis in a single center.
No full textIdentificazione, purificazione e preliminari studi applicativi di un nuovo composto fungicida prodotto e secreto da Kluyveromyces phaffii
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