1,720,997 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Mems Based Clamped-clamped Resonant Magnetometer
No full textTez (Yüksek Lisans) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2012Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2012Bu çalışmanın amacı, çift tarafdan kenetlenmiş rezonans manyetik sensorların mikro veya nano boyutlarda üretim teknoloji yöntemlerinin incelenmesidir. Bu tez kapsamında, monolitik üretim teknolojisi içinde CMOS devre yapısına uyumlu, çeşitli MEMS sistemlerinin tasarımları, üretimleri ve simülasyonları yapılmıştır. Üretilen Mikrosistemlerin mekanik ve elektriksel karakterizasyonları da tamamlanmıştır. Tasarlanan her bir tip mikrosistem Sonlu Elemanlar Metodu ile COMSOL ve COVENTORWARE yazılımları kullanılarak simulasyonları yapılmıştır. Bu tezde, her yapının birinci rezonans frekansları, maksimum akıma karşı dayanaklılığı, kalite faktörünün gerilim ile bağıntısı, ve özellikle mikrosistemin karakteristik parametrelerin çubuklar üzerinde olan deliklerin boyutları, çubuğun uzunluk yönünün ya da genişliğinin değiştirilmesi ile incelenmiştir. Deneysel ölçümler analiz sonuçları ile karşılaştırmalı biçimde değerlendirilmiştir. Bunun yanında, kapsamlı bir literatür çalışması yapılmıştır ve gelecekte yapılan bu tarz sensorların nasıl bir özelliğe sahip olmaları gerektiğini belirleyebiliriz.This thesis explains the new and several designing membrane and beams, which have been designed by ourselves by cadence software. Furthermore, all of the structures were fabricated by MEMS based, which are CMOS compatible characteristics. Also along the fabrication most of the sensors has been simulated by two softwares COMSOL and Coventorware that in both of them simulation is done by finite element method (FEM). During the simulation many behavior of the each structure such as natural frequency, maximum current endurance before smashing, and their displacements, with and without of the initial stress and effect of the dimension of the perforation were defined. we implement practical measurement with Polytec 500 device to compare outputs with simulation results. The principle of working of this devise is on base of Doppler velocimetry and interfering waves. In conclusion, we investigated each sample’s features such as; first mode resonance frequency, maximum applicable current, quality factor and displacement versus sample’s geometric and their inside perforation size. Thus, we have lots of data, which can be utilized in future for similar sensors to have an idea about their probable features.Yüksek LisansM.Sc
Micromachining of SI-wafer with femtosecond laser technology
No full textTez (Yüksek Lisans) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2011Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2011Femtosaniye lazer ile mikromalzeme işleme son dönemlerde gittikçe popüler hale geldi. Bunun sebebi ise lazerin darbe süresi thermal difuzyon yasasina gore ısının yayılımından çok daha kısa zamanda gerçekleşmekte. Femtosaniye lazerin bu ayrıcalığı, özellikle mikro malzeme gibi çok küçük hacimli malzemeler işlerken, malzeme daha ısınıp zarar görmeye başlamadan mikroişlemenin bitmesinden kaynaklanmakta. Tabi bu avantaj, en önemli husus olan enerji akışı değeri melting ve ablasyon eşiği arasında tutulduğu sürece geçerli olmakta. Yapılan deneylerde Si-Wafer’ın ablation ve melting threshold değerlerinin bulunmalarının yanı sıra en düzgün yüzey karakteristiğine sahip istenilen en ve derinlikteki kanallar açılması için gerekli diğer parametrelerin bulunması çalışıldı.Micromachining with Femtosecond Lasers has attracted a lot of attention in the recent years. The reason behind this is that according to the thermal diffusion law, femtosecond lasers pulse duration is faster than thermal diffusion itself. This advantage of femtosecond lasers helps avoid thermal damage while machining small volume materials such as micro materials. It only works as intended when using the lasers between the range of melting and ablation thresholds. During the experiments the ablation and melting threshold values for Si-Wafer were attained. Further experiments were run to gather the other required parameters to acquire cavities with the required depth and a smooth surface.Yüksek LisansM.Sc
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Get PDFWe 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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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