1,720,956 research outputs found
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
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INHERITANCE OF THE MULTIFOLIOLATE TRAIT IN TETRAPLOID ALFALFA, MEDICAGO SATIVA L.
No full textInheritance of the multifoliolate leaf (MFL) characteristic (leaves containing more than three leaflets) in tetraploid alfalfa was studied. Also, the effects of temperature and short-term aging of a few weeks on the expression of the MFL trait were determined. Broad sense heritability of the trait was also estimated. Two sets of diallel reciprocal crosses were intially made in the greenhouse using vacuum pump and alcohol for emasculation of the seed parent. There were six different clones in each set. Set I contained ML₁, ML₂ ML₄₉, ML(G), Lew-1, and Hayden-1 clones. The average number of leaflets per leaf for the above mentioned clones was 5.65, 4.52, 3.55, 3.20, 3.00, and 3.00, respectively. Set II was composed of ML₇, ML(F), ML₁₂, ML₅₂, N₁, and N₂ clones with the average number of 4.75, 4.15, 3.50, 3.25, 3.00 and 3.00 leaflets per leaf. Based on the F₁ and S₁ progenies, it was hypothesized that at least three major and independent genes, each with equal contribution to the expression of the MFL trait, were involved. This hypothesis was later substantiated by the observed segregation ratios of the 75 F₂ families from the cross Lew-1 x ML₁ which closely fit the expected ratios. These three genes, LA, LB, and LM showed incomplete dominance with additive gene action. No evidence for epistasis was found. There was a positive association between the number of dominant alleles and the degree of expression of the MFL trait. This association was so specific that plants with less than four, four, five, six, seven or more dominant alleles had an average number of 3.0, 3.1, 3.2-3.4, 3.5-4.0, and 4.1 or more leaflets per leaf respectively. Analysis of the 11 reciprocal crosses between trifoliolate (TFL) and MFL clones showed that only two reciprocal crosses produced a significantly higher number of MFL than TFL plants when the female parent was a MFL clone. Maternal or cytoplasmic effects were negligible. The average frequency of MFL leaves of the two clones (ML(G), ML₂) studied did not significantly change under warm (34°C, 25°C) and cool (17°C, 15°C) temperatures. There was no significant change in the expression of the MFL leaf frequency trait in these two clones from the first harvest scoring to the next. Plants were scored before harvesting at full bloom. Calculated broad sense heritability of the MFL trait was 86%. This indicates that the recurrent selection method for several cycles should increase the frequency of MFL plants in an alfalfa population very rapidly. There are excellent opportunities for improving the quality of commercially grown alfalfa by incorporating the MFL trait
Materialien und Oberflächenstruktur in der Endoprothetik - Von Makro bis Mikro/Von damals bis heute
No full textDiese Masterarbeit untersucht eingehend die Entwicklungen in den Materialien und der Oberflächenstruktur in der Endoprothetik. Der Fokus erstreckt sich von makroskopischen bis mikroskopischen Ebenen und beleuchtet den Fortschritt von den Anfängen bis zur gegenwärtigen Zeit. In der orthopädischen Chirurgie spielt die Endoprothetik, insbesondere Gelenkendoprothesen, eine entscheidende Rolle bei der Wiederherstellung der Mobilität und Lebensqualität von Patienten mit Gelenkerkrankungen. Die Arbeit analysiert die Entwicklung von Implantatmaterialien, von traditionellen Metallen bis zu modernen Titanlegierungen und Hochleistungspolymeren.
Ein besonderer Schwerpunkt liegt auf der Oberflächenstruktur der Endoprothesen, die die Wechselwirkung mit dem umgebenden Gewebe beeinflusst. Untersucht werden verschiedene Aspekte der Oberflächenmodifikation, angefangen bei makroskopischer Rauheit bis hin zu mikroskopischen Beschichtungen, um die biologische Verträglichkeit und Langzeitleistung der Implantate zu verbessern. Die Arbeit verfolgt den evolutionären Fortschritt von frühen Endoprothesen bis zu modernen Designs und betont dabei den Einfluss von Materialinnovationen und Oberflächentechnologien auf die klinische Wirksamkeit und Patientenzufriedenheit.
Durch eine umfassende Analyse von Literatur und technologischen Fortschritten bietet diese Arbeit Einblicke in die historische Entwicklung und den aktuellen Stand der Materialien und Oberflächenstruktur in der Endoprothetik. Die gewonnenen Erkenntnisse tragen dazu bei, das Verständnis für die Optimierung von Implantatdesigns und -materialien zu vertiefen und zukünftige Entwicklungen in diesem vitalen Bereich der Medizintechnik zu fördern.This master's thesis extensively explores developments in materials and surface structures in endoprosthetics. It spans from macroscopic to microscopic levels and sheds light on the progression from inception to the present day. In orthopedic surgery, endoprosthetics, particularly joint endoprostheses, play a crucial role in restoring mobility and quality of life for patients with joint diseases. The thesis analyzes the evolution of implant materials, from traditional metals to modern titanium alloys and high-performance polymers.
A particular focus lies on the surface structure of endoprostheses, which influences their interaction with surrounding tissue. Various aspects of surface modification are examined, ranging from macroscopic roughness to microscopic coatings, aiming to enhance the biological compatibility and long-term performance of the implants. The thesis traces the evolutionary progress from early endoprostheses to modern designs, emphasizing the impact of material innovations and surface technologies on clinical effectiveness and patient satisfaction.
Through comprehensive analysis of literature and technological advancements, this thesis provides insights into the historical development and current state of materials and surface structure in endoprosthetics. The findings contribute to deepening understanding of optimizing implant designs and materials, and to promoting future developments in this vital area of medical technology.eingereicht von Azizi Mohammad RezaMasterarbeit Johannes Kepler Universität Linz 2024Arbeit auf den öffentlichen PCs in den Bibliotheken der JKU+Medizin abrufba
Economic planning, industrialization, and import substitution in Iran
No full textIran attempted to set up a national economic plan after the second world war. After 1949, Iran has experienced five different development plans. The Fifth Five Year Plan is the one which is in operation at the present time. Before industrialization, the nation’s economy was dominated by oil and agriculture. There was a dual purpose for the intensive industrialization which started in the early 196’s - reducing the economy's dependence on exports of primary products, and increasing the rate of economic growth. The purpose of this thesis is to study the planning process and the process of import substitution in Iran. An attempt has been made to evaluate the different plans to determine the major problems involved in each particular plan and to evaluate the degree and extent to which each plan has succeeded in achieving the major targets of the plan, particularly in the industrial sector. An attempt also has been made to collect the set of available data on production, imports and exports of industrial goods at a somewhat disaggregated level to make some sensible analysis of the degree of import substitution and the patterns of industrial growth
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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