1,721,495 research outputs found
Chirurgische Massnahmen bei therapierefraktärem Ulcus beim diabetischen Fuss
No full textBei Patienten mit Diabetes mellitus kommt es aufgrund einer vorliegenden Polyneuropathie sowie Makro- und Mikrozirkulationsstörungen gehäuft zu Fussulzerationen. Werden diese Ulcera nicht früh genug mittels guter Wundpflege konservativ behandelt, kann es zu Infektionen bis hin zu einer Osteomyelitis kommen. Oft liegt den chronischen Ulzerationen aber auch eine ossäre Fehlstellung des Fusses zugrunde. Dann ist es möglich, dass trotz guter Wundpflege die Ulzerationen nicht konservativ beherrschbar sind. Bei ausgeprägten Fehlstellungen kann eine orthopädische Schuhversorgung zudem deutlich erschwert bis verunmöglicht sein. In diesen Situationen ist es mittels chirurgisch-orthopädischen Massnahmen möglich, die Fussfehlstellung dahingehend zu korrigieren, dass die Druckspitzen aufgrund ossärer Fehlstellungen beseitigt werden können. Dadurch können auch Ulzera zur Abheilung gebracht werden.
Im folgenden Artikel soll auf die verschiedenen zur Verfügung stehenden chirurgischen Korrekturmöglichkeiten eingegangen werden.
Summary Patients with diabetes mellitus often also suffer from a polyneuropathy or a macro- and microangiopathy. This often leads to foot ulcers. If these ulcers are not treated appropriately with comprehensive wound care, infection or even osteomyelitis may result. Chronic ulceration is often caused by bony prominences due to malalignment of the foot. In this case, it is possible that comprehensive wound care alone will not be successful. If a complex malalignment of the foot is present, fitting of orthopedic shoes becomes increasingly difficult.
In these situations, surgical procedures can help to even out the pressure peaks due to bony prominence
Microbial activity in a sandy arable soil is governed by the fertilization reuirne
No full textThe aim of this study was to compare the influence of two different long-term organic fertilization regimes at an arable site on a nutrient-poor, sandy soil with respect to soil microbial biomass contents and microbial activities. The investigation was performed on a long-term experimental arable field site, located in the semi-continental climate of Central Europe (IOSDV, Berlin-Dahlem, Germany). Soil microbial biomass and dehydrogenase activity were most clearly increased by combined straw and green manure treatment. In comparison. farmyard manure had a weaker effect. explained by less frequent applications and different quality of organic materials incorporated into soil. The mineral N-fertilization did not significantly effect microbial biomass content or dehydrogenase activity of the soil under study. The cellulase activity was increased markedly by straw and green manure treatment. but was increased only slightly by mineral fertilization. Organic manuring with plant residues had a stronger impact on soil microbial activity as compared to different soil sampling dates. We conclude that soil microbial activity was governed most clearly by the fertilization regime under the conditions of the investigated field experiment. Furthermore, manuring with plant residues has the most beneficial effects on soil quality among the investigated types of fertilization. (C) 2004 Elsevier SAS. All rights reserved
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
Spin-polarized LEED from Xe-Pt(111)
Full text linkHilgers G, Kleineberg U, Nolting K, Wirth S, Müller N, Heinzmann U. Spin-polarized LEED from Xe-Pt(111). Vacuum. 1990;41(1-3):325-327
Xe-adlayers on Pt(111) and Pd(111): structure investigation by spin-polarized LEED
Full text linkHilgers G, Potthoff M, Wirth S, et al. Xe-adlayers on Pt(111) and Pd(111): structure investigation by spin-polarized LEED. Surface Science. 1991;251-252:612-615
- …
