1,720,984 research outputs found
A new approach for measuring viscoelastic properties of soft materials using the dynamic response of a spherical object placed at the sample interface
No full textBackground: There are several techniques to characterize the mechanical properties of soft materials, such as the indentation method and the method based on the application of a spherical object placed inside the sample. The indentation systems usually yield the elastic properties of materials and their mathematical models do not consider the inertia of the sample involved in motion and radiation damping, while placing an object inside the sample is not practical and this procedure can alter the mechanical properties of the sample for the method based on the application of a bubble/sphere placed inside the sample. Objective: A new approach for the identification of the viscoelastic properties of soft materials using the dynamic response of a spherical object placed at the sample interface was proposed. Methods: The spherical object placed at the sample interface was pressed using an electromagnet and the dynamic response of the spherical object was tracked using a high-speed camera, while the dynamic response of the spherical object placed at the sample interface was estimated using a comprehensive analytical model. The effects of the shear modulus, viscosity, Poisson’s ratio and density of the soft sample, the radius and density of the spherical object and the damping due to radiation were considered in this mathematical model. The shear modulus and viscosity of the soft sample were determined by matching the experimentally identified and theoretically estimated responses of the spherical object. Results: The shear moduli and viscosities of the three phantoms with the gelatin mass ratios of 0.20, 0.25 and 0.29 were measured to be 3450, 4300 and 4950 Pa and 12.5, 14.0 and 15.0 Pa⋅s, respectively. The shear modulus and viscosity of the phantom increases as the gelatin mass ratio increases. The frequency of oscillations of the hemisphere placed at the phantom interface increases as the gelatin mass ratio increases due to stiffness increase. Conclusions: After matching the experimental and theoretical steady-state displacements and amplitudes of oscillations of the hemisphere at the sample interface, the comparison of the experimentally identified and theoretically predicted frequency of oscillations further confirmed the identified material properties of the samples. The approach presented here is expected to provide valuable information on material properties in biomedical and industrial applications.WOS:0010826474000032-s2.0-85174051012ArticleUluslararası işbirliği ile yapılan - EVETYÖK - 2022-23Eki
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
KANÛNÎ VAKFİYESİ'NE GÖRE SÜLEYMANİYE CAMİİ VE GÖREVLİLERİ
No full textCamiler, İslâm medeniyetinin en önemli kurumların-- dan biridir. Başlangıçtan günümüze kadar ibadethâne olmalarının yanında eğitim, barınma, ordu karargâhı, adliye, yardımlaşma ve dayanışma gibi pek çok ihtiyacın karşılandığı mekânlar olmuşlardır. AHMET Koç PROF. DR. MARMARA U. iLAHiYAT FAKÜLTESİ öMER ÖZDEMİR AR.GÖR. MARMARA U. SOSYAL BİLİMLER ENSTİTÜSÜ İslâm tarihi boyunca şehir planlarının merkezinde yer alan camiler, zaman içerisinde gelişmiş külliye yapı-- ların da ana unsuru olmuşlardır. Bu külliyelerde cami, medrese, mektep, kütüphane, muvakkithâne, hazîre, dârüşşifâ, imâret, tabhâne, çarşı, han, hamam, çeşme gibi çok işlevsel yapılar yer almıştır. Bu külliyelerin en güzel örneklerini Osmanlı'da görmek mümkündür. Bu örnekler içerisinde Süleymaniye Külliyesi'nin ayrı bir yeri vardır. Bu külliye Osmanlı Devleti'nin en güçlü padişahlarından biri olan Kanünî döneminde ve en büyük mimarlarından Sinan tarafından yapılmıştır. Bu çalışmada, Süleymaniye Külliyesi hakkında genel bilgiler verildikten sonra Külliyenin ana yapısı olan Süleymaniye Camii'nde yürütülen hizmetler ve bunları yerine getiren personelin nitelikleri ile bunların görevleri ve aldıkları ücretler üzerinde durulacaktır.Mosques are one ofthe most important institutions of Islamic civilization. Throughout history, mosques have been places that serve for social needs like education, housing, headquarter, courthouse, cooperation and solidarity as well as being the place of worship. Located in the center of city-plans throughout the history of Islam, mosqus have become the main element of more developed complex structures called kulliya. In the kulliyas (social complexes), functional structures are located such as mosque, madrasa, school, library, muvakkithane (time keeper-house), cemetery, hospital, imaret (poorhouse), tabhane (guest house), bazaar, han (inn), Turkish bath, and fountain. It is possible to see the most beautiful examples of these social complexes in the Ottoman Empire. Suleymaniye social complex has an important place among these examples. It has been built by the great architect Mimar Sinan in the reign of Suleyman the Magnificent, one of the most powerful sultans of the Ottoman Empire. general information will beIn this study, first, some given about the Suleymaniye Mosque, and then, the services performed in the mosque, which is the main structure of the kulliya, its officials, their qualifications, duties and fees will be mentioned
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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