1,721,174 research outputs found
İstanbul’da Yol Kenarı Parklarda Kullanıcı Alışkanlıklarının İncelenmesi
No full textIstanbul is a megacity with a population of approximately 15 million, motor vehicles of 3.875 million including 2.669 million passenger cars, and on-street parking exceeding 70 percent of charged- or free-on-street parking, or illegal parking. In this study, changes in on-street parking users' behavior in Istanbul were analyzed as hours, days, months, seasons and years with taking advantage of the car parking data for about last 8 years. Effects of fee increases and short-term free parking practices were also examined. As a result of the study; It was found that 20 percent of the day parking entry was between 09.00 and 11.00, the maximum transactions occurred on Wednesday the middle day of the week, both the minimum transactions and the longest average parking time took place on Sunday. In addition, the average parking duration of the vehicles in on-street parking was increased year after year, furthermore the occupancy (parking index) in European side was reached 86 percent between 14.00 and 15.00, and the average parking time was about 2 hours. In another important investigation, in that 0-15 minute free parking option applied on on-street parking was temporarily removed; there were a marked decrease in parking turnovers, and increase in a rate of collection, income per transaction and the average parking time. However, when the 0-15 minute-free parking option was reapplied, a significant increase in assessment and collection rate was observed and positive effects on payment behaviors of parking users were determined
Investigation of Air Quality in the Underground and Aboveground Multi-Storey Car Parks in Terms of Exhaust Emissions
No full textAbstractExhaust emissions resulting from the motor vehicles have harmful and long lasting effects on both the human health and environment. Especially increasing concentrations of exhaust emissions in the closed environments and in the environments that cannot be sufficiently ventilated can cause damage on the human health and lead even to the death. The main harmful exhaust emissions based on the motor vehicles are gases such as CO (carbon dioxide), HC (hydrocarbons), and NOx (nitrogen oxides). In the circumstances of remaining under the influence of these gases, all the systems of the human body are generally get harmed. Therefore, the exhaust emission maps of the areas where there are the harmful exhaust emission concentrations in the high level, and the discharge methods of these gases in a very short space of time must be. In this study, the emission measurements have been carried out in four underground and five aboveground multi-storey car parks located in Istanbul. The effects on the human health of the measured fields were studied by the use of the results of the performed measurements, by comparing them with the maximum allowable concentration (MAC) and the threshold limit value - time weighed average (TLV – TWA) values. Taking into consideration all of the measurement results in the under-ground and above-ground multi-storey car parks, it is determined that the short-term use of the measured fields do not pose any risks in terms of human health. The suggestions regarding the improvement works of the car-parks were presented
Synthesis and Optical Properties of Novel Red-Emitting PbNb2O6: Eu3+ Phosphors
Full text linkUndoped and PbNb2O6:Eu3+ (1.0 aecurrency sign x aecurrency sign 6.0 mol%) phosphors were synthesized at 1100 A degrees C for 3.5 h by the conventional solid state reaction method. Synthesized PbNb2O6:Eu3+ phosphors were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Energy dispersive spectroscopy (EDS) and Photoluminescence (PL) analyses. The PL spectra showed series of excitation peaks between 350 and 430 nm due to the 4f-4f transitions of Eu3+. For 395.0 nm excitation, emission spectra of Eu3+ doped samples were observed at 591 nm (orange) and 614 nm (red) due to the D-5(0) -> F-7(1) transitions and D-5(0) -> F-7(2) transitions, respectively. PL analysis results also showed that the emission intensity increased by increasing Eu3+ ion content. No concentration quenching effect was observed. The CIE chromaticity color coordinates (x,y) of the PbNb2O6:Eu3+ phosphors were found to be in the red region of the chromaticity diagram
Demir, Abdullah. Ebû İshâk Zâhid es-Saffâr'ın Kelâm Yöntemi. Doktora tezi, Cumhuriyet Üniversitesi Sosyal Bilimler Enstitüsü, Sivas 2014.
No full textEbû İshâk İbrâhim ez-Zâhid es-Saffâr, Mâtürîdî kelâm anlayışının önemli bir temsilcisidir. O, Mâtürîdîliğin ortaya çıktığı sosyokültürel çevre olan Mâverâünnehir bölgesinin Buhara şehrinde, takriben 450/1058 yılında doğdu, öğrenimini burada tamamladı ve Merv şehrine sürgüne gönderilinceye kadar Buhara Hanefî âlimlerinin reisi olarak anıldı. Sürgün dönüşü Buhara'da 534/1139 yılında vefat etti. Bu çalışmada, onun kelâm yöntemi konu edildi. Giriş bölümünde; araştırmanın konusu, önemi, amacı, yöntemi ve kaynakları hakkında bilgi verildi. Saffâr'ın yaşamını sürdürdüğü Mâverâünnehir bölgesinin V. (XI.) ve VI. (XII.) yüzyıllardaki siyasî, sosyoekonomik ve ilmî durumu ile bölgede varlık gösteren din, mezhep ve felsefî akımların etkinlikleri birinci bölümde tespit edildi. İkinci bölümünde onun hayatı, ilmî kişiliği, eserleri ve atıf yaptığı kaynaklar belirlendi. Son bölümde ise Saffâr'ın kelâm yöntemi tanılmaya çalışıldı. Bunun için onun günümüze ulaşan Telhîsü'l-edille li-kavâ?idi't-tevhîd ve Risâle fi'l-kelâm adlı kelâm eserleri tahlil edilerek öncelikle itikadî konularda akla değer vermeyi ve gerektiğinde fikrî tartışmalara girmeyi savunan kelâm ilmine bakışı ve kelâm müdâfaası tespit edildi. Daha sonra bilgi teorisi kapsamına giren bilginin tanımı, imkânı, kaynakları ve bilgi türleri hakkındaki görüşleri ile savunduğu ve eleştirdiği bilgi anlayışları belirlendi. Ayrıca onun kelâm yöntemini ortaya koyabilmek adına aklın ve naklin bilgisel değeri konusuna bakışı ele alındı. Zita bu husus, mütekellimlerin ve İslâm mezheplerinin yöntemlerinde belirleyicidir. Son olarak görüşlerini temellendirirken ve savunurken Saffâr'ın kullandığı istidlâl türleri belirlendive örneklerle tanıtıldı
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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