1,720,959 research outputs found
Investigation Of The Performance Based Design Criteria Of Reinforced Concrete Buildings By Using Fuzzy Set Approach
Full text linkTez (Doktora) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2009Thesis (PhD) -- İstanbul Technical University, Institute of Science and Technology, 2009Performansa göre bina değerlendirmesinde kullanılan deprem yönetmelikleri ve çeşitli dokümanlar çok keskin ve katı sınırlar içermektedir. Yapısal sistem modellenirken ve sayısal analizler yapılırken kullanılan kabullerdeki kısıtlamalar hesaplarda kesinlik değil yaklaşıklık olduğunun göstergesidir. Bu doktora tezinde mevcut binaların performans değerlendirmesi için yeni bir yaklaşım sunulmuştur. Kiriş, kolon ve perdeler için performans seviyeleri bulanık küme teorisi kullanılarak elemanların deformasyon seviyeleri belirli ağırlık değerlerine bağlı olarak esnek bir şekilde tanımlanabilir. Bu esnek tanımlama literatürde ilk defa ifade edilmiş ve “Esnek performans” olarak adlandırılmıştır. Yöntem sayısal olarak, FEMA356 ve TDY2007’de verilen tablo verileri ile MATLAB Fuzzy Toolbox ve Simulink özellikleri kullanılarak değerlendirilmiştir. Yöntem 1200’ün üzerinde üretilmiş veri ile test edilmiş, performans seviyeleri belirlenmiş ve sonuçlar tablo ve grafiklerde karşılaştırmalı olarak verilmiştir.For the performance evaluation of the buildings, the recommendations and related restrictions are given in different seismic codes and documents having very strict boundaries. When the approximations made in structural system modeling and in numerical analysis, generally the logical consequences of those restrictions are questionable. In this doctorate thesis, a new approach is presented for the performance evaluation of existing buildings. It is shown that the performance levels for beams, columns and shear walls can be defined as flexible by using certain weighted values depending on the number and the deformation levels of elements (flexible performance) as used in the fuzzy set theory. In the numerical treatment of the presented method, the damages and the corresponding performance levels given in FEMA356 and TDY2007 are considered and MATLAB Fuzzy Toolbox and Simulink options are used. The method is tested over 1200 data, the performance levels are determined and the results are given in tables and graphs are discussed, comparatively.DoktoraPh
Usage And Applications Of The Performance Method To Evaluate The Existing Concrete Buildings
Full text linkTez (Yüksek Lisans) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2001Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2001Bu çalışmada bir Non-lineer Statik Analiz olan Pushover (Kapasite) Analiz ve bu analizin yapı üzerine değişik ve esnek fonksiyonlarda uygulanabilmesi için Performans Metodu anlatılmış ve bu yöntemlerin hem el ile hem de bilgisayarla yapılmış uygulamaları, örnekleri teze ilave edilmiş ve sonuç olarak da bu analiz yönteminin eksikleri, yanlışlıkları üzerinde çalışılması gereken konuları ortaya çıkarılıp tez içerisinde ve özette izah edilmeye çalışılmıştır. Bu çalışma depreme karşı yapı davranışı hakkında bilgisi olan tecrübeli mühendisler için yeni bir yöntem klavuzu niteliğindedir. Bu çalışma ne kadar bir klavuz niteliğinde olsa da yöntemin iyi yorumlanabilmesi için yapı dinamiğine ve deprem etkilerine hakim olunması gerekir.In this study pushover analysis, a non-lineer static analysis, a Performance Analysis have been described for application of Pushover Analysis over the structure at variable and flexible functions. The applications and examples of these methods performed with both hand and computer calculations have been included in this thesis and, in conclusion, it has been tried to explain the subjects that has to be studied over the deficiencies and errors of this analysis method in this thesis and in the summary. This study is a method handbook for experienced engineers who have a knowledge about strueture behavior aganist earthquake. Despite the fact that this study is like an handbook, the render must have a good knowledge about structure dynamics and earthquake effect for a good interpretation of this method.Yüksek LisansM.Sc
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
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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