1,722,235 research outputs found
Acetabular reconstruction with impacted morsellized cancellous bone grafts in cemented revision hip arthroplasty
No full textContains fulltext :
mmubn000001_210341459.pdf (Publisher’s version ) (Open Access)Promotores : T. Slooff, R. Huiskes en P. BumaIX, 134 p
A Slooff-technika nanokompozit csontpótló anyaggaltörténő alkalmazhatóságának meghatározása biomechanikai vizsgálatokkal
No full textA nano-composite based material has been developed by two work teams at the University of Debrecen for the treatment of particularly large bone defects; the project was supported by an OTKA grant. In case if this material is used for fi xing a cementless revision hip prosthesis, the possibility of using the so-called impaction Slooff-technique has raised. We accomplished three biomechanical experiments to decide whether our bone substitution material is suitable for using in Slooff-technique. Summarizing our results, we have found that the method can be applied safely when the thickness of the cortical bone is higher than 1 mm.A Debreceni Egyetemen két munkacsoport egy OTKA pályázat keretén belül egy nanokompozitalapú csontpótló anyagot fejlesztett ki, amely különösen alkalmas nagy csontdefektusokkal járóműtétek esetén a csontszövet pótlására. Ha ezt az anyagot revíziós csípőprotézisszárak cementnélküli rögzítésére használjuk, akkor az impaktációs ún. Slooff-technika alkalmazásának lehetőségeis felmerül. Annak eldöntésére, hogy a csontpótló anyagunk alkalmas-e a Slooff-technikamegvalósítására, három biomechanikai kísérletsorozatot végeztünk. Eredményeinket összesítveazt állapítottuk meg, hogy 1 mm-nél vastagabb corticalis esetén a módszer biztonságosan alkalmazható. DOI: 10.17489/biohun/2013/2/0
Evidence for erbium-erbium energy migration in erbium(III) bis(perfluoro-p-tolyl)phosphinate
No full textCopyright 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. This article appeared in Applied Physics Letters 92, 103303 (2008) and may be found at
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
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
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
Femtosecond spectroscopic studies of photoinduced electron transfer in MDMO-PPV:ZnO hybrid bulk heterojunctions
No full textThe photophysics of charge carriers (polaron) in MDMO-PPV:ZnO hybrid bulk heterojunction is studied at 80 K by femtosecond transient absorption spectroscopy. A short-lived positive polaron is observed in the blend phase in MDMO-PPV:ZnO blend films with a weight ratio of 1:1 and 1:2. Further increase of ZnO weight ratio results in a significant quenching of the polaron absorption. The results are discussed in the concept that both pristine polymer and MDMO-PPV:ZnO blend phases coexist in the blend films. It is concluded that a polaron is photogenerated within the excitation laser pulse (<100 fs) and electron transfer efficiency is highest in blend films 1:1 and 1:2. Lack of the interfacial area and faster back electron transfer process are discussed to be responsible for the quenching of the electron transfer efficiency in blend film 1:3
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
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