169,800 research outputs found
Ricci collineations on 3-dimensional paracontact metric manifolds
No full textWe classify three-dimensional paracontact metric manifold whose Ricci operator Q is invariant along Reeb vector field, that is, L(xi)Q = 0
Nullity conditions in paracontact geometry
No full textThe paper is a complete study of paracontact metric manifolds for which the Reeb vector field of the underlying contact structure satisfies a nullity condition (the condition (1.2), for some real numbers and k and μ. This class of pseudo-Riemannian manifolds, which includes para-Sasakian manifolds, was recently defined in Cappelletti Montano (2010) [13]. In this paper we show in fact that there is a kind of duality between those manifolds and contact metric (k,μ)-spaces. In particular, we prove that, under some natural assumption, any such paracontact metric manifold admits a compatible contact metric (k,μ)-structure (eventually Sasakian). Moreover, we prove that the nullity condition is invariant under D-homothetic deformations and determines the whole curvature tensor field completely. Finally non-trivial examples in any dimension are presented and the many differences with the contact metric case, due to the non-positive definiteness of the metric, are discussed
Narrative and reader in flash fictions of Sevim Burak, Ferit Edgü, and Murathan Mungan
No full textÇağdaş Türk edebiyatında 1980'li yıllardan bugüne kadar okurun beklenti ufkunu karşılayan küçürek öykü, bağımsız bir alt tür olarak varlığını sürdürmektedir. Sevim Burak ve Ferit Edgü, türün öncü yazarları arasında kabul edilirken Murathan Mungan, kendine özgü üslubuyla türe yeni bir ses getirmiştir. Sevim Burak'ın Afrika Dansı ve Palyaço Ruşen'i; Edgü'nün Binbir Hece, Doğu Öyküleri, İşte Deniz, Maria, Do Sesi, Avara Kasnak, Nijinski Öyküleri ve Yolun Gittiği Yer adlı kitapları; Murathan Mungan'ın Kibrit Çöpleri türün özelliklerini yansıtan dikkate değer öykülerden oluşmaktadır. Bununla birlikte, Türk edebiyatında küçürek öykü çalışmalarına sıklıkla konu olan bu eserlerin yeterince kapsamlı bir şekilde incelenmediği gözlemlenmiştir. Bu tezin ana varsayımı, küçürek öykünün bütüncül olarak anlamlandırılabilmesi için artistik ve estetik uçların bir arada değerlendirilmesi gerekliliğidir. Bu kapsamda, tezde ilk olarak küçürek öykü üzerine kuramsal tartışmalar gözden geçirilerek hem metin çözümlemesine hem de okur yorumuna bir arada başvurulmasının gerekliliği tartışılmıştır. Ardından, anlatıcının ve okurun rolünün belirlenmesi amacıyla söz konusu yazarların tüm kitaplarında yer alan küçürek öyküler, yapısalcılık ve alımlama estetiği ekseninde çözümlenmiştir. Yapısalcılık bağlamında yapılan inceleme, anlatıcı tiplerini belirlemeye olanak sağlamış ve anlatıdaki boşlukları görünür kılmıştır. Sonra, bu boşluklar aracılığıyla yazar tarafından anlatıya dâhil edilen okurun rolü, alımlama estetiği ekseninde değerlendirilmiştir. Sonuçta Burak, Edgü ve Mungan'ın küçürek öykülerini yorumlamak için ne yazarın niyetinin ne edebî metnin sesinin ne de okurun keyfî yorumunun tek başına yeterli olduğu anlaşılmıştır. Böylece, bir küçürek öykünün ancak yazar-metin-okur üçgeninde anlam kazanacağı ortaya koyulmuştur.Flash fiction, also known as short short story, which meets Turkish readers' horizon of expectation from the 1980s onward, exists as an independent sub-genre in contemporary Turkish literature. Sevim Burak and Ferit Edgü have been accepted as the pioneering writers of the genre while Murathan Mungan has brought a new voice to it through his distinctive style. Sevim Burak's Afrika Dansı (African Dance) and Palyaço Ruşen (Ruşen, the Clown); Edgü's Binbir Hece (A Thousand and One Syllables), Doğu Öyküleri (East Stories), İşte Deniz, Maria (Here, the Sea, Maria), Do Sesi (The C Sound), Avara Kasnak (Idler), Nijinski Öyküleri (Stories of Nijinski) and Yolun Gittiği Yer (Where the Road is Headed); Murathan Mungan's Kibrit Çöpleri (Matchsticks) consist of remarkable pieces that reflect the characteristics of the genre. Although flash fiction research in Turkish literature refers amply to those works, one can observe that they are understudied in terms of theory and textual analysis. The main hypothesis of this study is that for a holistic interpretation of flash fiction it is necessary to consider the artistic and the aesthetic poles together. Within this scope, the thesis first reviews the theoretical discussions on flash fiction and argues the necessity of appealing to both textual analysis and reader's response. Secondly, in order to distinguish the roles of the narrator and the reader, it analyzes all of the stories in the aforementioned books according to the methods of structuralism and reception aesthetics. The structuralist reading has revealed the typology of the narrator and shed light on the narrative gaps. Then, the role of the reader, integrated into the narrative by the author through these gaps, has been evaluated on the axis of reception aesthetics. In conclusion, it is understood that neither the author's intention nor the voice of the text nor the arbitrary interpretation of the reader is single-handedly sufficient to interpret the stories of Burak, Edgü, and Mungan. Thus, it was determined that the meaning of a flash fiction can only be comprehended within the author-text-reader triangle
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
Contact slant geometry of submersions and pointwise slant and semi-slant-warped product submanifolds
No full textNeill [5] and Gray [1] investigated the Riemannian submersion between Riemannian manifolds. These submersions were later extensively studied in differential geometry
Tracing Ecophobia: An Ecofeminist Look At the Nature/Culture Dichotomy in Murathan Mungan’s Play Geyikler Lanetler
No full textThe ecophobia hypothesis, theorized by Simon C. Estok, aims to analyze the traces of hostile attitudes of human societies toward the natural environment and to connect these attitudes with racism, misogyny, homophobia, and speciesism in literature, art, and cultural studies. As a result of the dualist approaches internalized by modern societies, making ecophobia visible—which is implicitly encountered in everyday language, literature, and art—brings with it an ecofeminist approach. This study aims to examine the nature/culture dichotomy by approaching the natural world, nonhuman creatures, fantastic elements, and female characters encountered in Murathan Mungan’s play Geyikler Lanetler from an ecofeminist perspective, and in this way, to track the traces of ecophobia within the play
A Multi-Language Comparison of Influences on Author Verification using Character N-Grams
No full textWe create a new multi-language corpus for author verification based on Wikipedia talkpages, and evaluate the influence that differences in topic and time have on character n-gram author profiles. Topic alignment between two texts is found to increase author verification precision, and an authors writing style is found to change over time, but not more significantly after 3 years than after 1 year.Information ArchitectureWISElectrical Engineering, Mathematics and Computer Scienc
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