89 research outputs found
A non-obstructive gastric antral web case detected after upper gastrointestinal system bleeding
No full textThis is the first study on the construction of the relation-ship between a non-obstructive gastric antral web and gastric-outlet obstruction in children and adults.Congenital or acquired gastric antral webs (GAWs) may cause gastric-outlet obstruction in children and adults. Endoscopic methods are often used in the treatment of obstructive GAWs. We report the case of a patient with a congenital non-obstructive antral gastric web. The pa-tient was a 25-year-old male with gastrointestinal hem-orrhage followed by dyspeptic complaints. There was a follow-up period for the patient after treatment. Because GAWs are encountered and rarely reported in the litera-ture, the images taken during endoscopic surgery of the patient, as a significant contribution to the literature, are also presented
Pseudo Picard Operators On Generalized Metric Spaces
No full textAltun, Ishak/0000-0002-7967-0554; Samet, Bessem/0000-0002-6769-3417In this paper, we present a new class of pseudo Picard operators in the setting of generalized metric spaces introduced recently in [M. JLELI AND B. SAMET: A generalized metric space and related fixed point theorems, Fixed Point Theory Appl., (2015) 2015:61]. An example is provided to illustrate the main result.Deanship of Scientific Research at King Saud UniversityDeanship of Scientific Research at King Saud University [RGP-237]The second author extends his appreciation to the Deanship of Scientific Research at King Saud University for funding this work through research group No RGP-237
An extension of Assad-Kirk's fixed point theorem for multivalued nonself mappings
No full textAltun, Ishak/0000-0002-7967-0554In the present paper, taking into account the recent developments on the theory of fixed point, we give some fixed point results for multivalued nonself mappings on complete metrically convex metric spaces. Our main result properly includes the famous Assad-Kirk fixed point theorem for nonself mappings. Also, we provide a nontrivial example which shows the motivation for such investigations of multivalued nonself contraction mappings.TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK)The authors are grateful to the referees because their suggestions contributed to improve the paper. The second author would like to thank TUBITAK for their financial supports during his PhD studies
Fixed point theorems for Ćirić-type strong almost contractions on partial metric spaces
No full textBerinde, Vasile/0000-0002-3677-795X; Altun, Ishak/0000-0002-7967-0554; Berinde, Vasile/0000-0002-3677-795XIn the present paper we prove some fixed point theorems for A dagger iriA double dagger-type strong almost contractions on partial metric spaces. We also give an illustrative example.Romanian Ministry of Education and Research [PN-II-RU-TE-2011-3-239]The authors are grateful to the referees because their suggestions contributed to improve the paper. The second author research was supported by the Grant PN-II-RU-TE-2011-3-239 of the Romanian Ministry of Education and Research
Characterizations of partial metric completeness in terms of weakly contractive mappings having fixed point
No full textWe characterize both complete and 0-complete partial metri
c spaces in terms
of weakly contractive mappings having a fixed point. Our resu
lts extend
a well-known characterization of metric completeness due t
o
Suzuki
and
Takahashi
to the partial metric frameworkThe authors are grateful to the referees because their suggestions contributed to improve the paper. The second named author thanks the support of the Ministry of Science and Innovation of Spain, grant MTM2009-12872-C02-01.Altun, I.; Romaguera Bonilla, S. (2012). Characterizations of partial metric completeness in terms of weakly contractive mappings having fixed point. Applicable Analysis and Discrete Mathematics. 6(2):247-256. https://doi.org/10.2298/AADM120322009AS2472566
Caristi's type mappings on complete partial metric spaces
No full text[EN] We introduce a new type of Caristi's mapping on partial metric spaces and show that a partial metric space is complete if and only if every Caristi mapping has a fixed point. From this result we deduce a characterization of bicomplete weightable quasi-metric spaces. Several illustrative examples are given.The third author thanks the support of the Spanish Ministry of Science and Innovation, grand MTM2009-12872-C02-01.Acar, Ö.; Altun, I.; Romaguera Bonilla, S. (2013). Caristi's type mappings on complete partial metric spaces. Fixed Point Theory. 14(1):3-10. https://riunet.upv.es/handle/10251/56874S31014
Caristi's Type Mappings On Complete Partial Metric Spaces
No full textAltun, Ishak/0000-0002-7967-0554We introduce a new type of Caristi's mapping on partial metric spaces and show that a partial metric space is complete if and only if every Caristi mapping has a fixed point. From this result we deduce a characterization of bicomplete weightable quasi-metric spaces. Several illustrative examples are given.Spanish Ministry of Science and InnovationSpanish Government [MTM2009-12872-C02-01]The third author thanks the support of the Spanish Ministry of Science and Innovation, grand MTM2009-12872-C02-01
A stationary point theorem for multivalued θ-contractions
No full textAltun, Ishak/0000-0002-7967-0554This paper is mainly devoted to a positive answer, with a new aspect, of the problem considered by Hanc, er et al. in [11] concerning multivalued version of theta - contraction which have been recently introduced by Jleli and Samet [15]. Considering delta - distance between two bounded subsets of a metric space, we provide a stationary point results for multivalued theta - contractions.TUBITAK (The Scientific and Technological Research Council of Turkey)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK)The authors were grateful to the reviewers for useful suggestions which improve the contents of this paper. The first author would like to thank TUBITAK (The Scientific and Technological Research Council of Turkey) for their financial supports during his PhD studies
Selçuk Altun'un romanlarında kültürel kaynaklar
No full textSelçuk Altun, (d. 1950) 2000’li yılların başlarıyla birlikte eser vermeye başlamış bir romancıdır. Yazarın hâlihazırda 10 tane romanı bulunmaktadır. Anlatıcılarını bilgili, kültürlü, estetik zevki gelişmiş kişiler olarak tasarladığından romanları kültürel açıdan zengin bir hal almıştır. Bu durum ise yazarın romanlarındaki kültürel kaynaklara yönelik bir çalışma gerçekleştirmemizi sağlamıştır. Çalışma, üç ana bölümden oluşmaktadır. İlk bölümde Selçuk Altun’un yaşamı, yapıtları verilmiş ve romancılığı irdelenmiştir. İkinci bölüm; kültür sözcüğünün kökeninin nereden geldiğinin açıklandığı, sözcük anlamının zamanla yaşadığı değişiklere değinildiği ve son olarak felsefe, antropoloji, sosyoloji ve edebiyat dünyasındaki kişilerin kültür kavramıyla ilgili yaptığı tanımlamaların verildiği bölümdür. Bu tanımlamalardan hareketle Selçuk Altun’un romanlarındaki kültürel kaynakların hangi başlıklar altında incelenmesi gerektiğine karar verilmiştir. Üçüncü bölümde Selçuk Altun’un romanlarındaki kültürel kaynaklar sanat, bilim ve diğer kültürel kaynaklar çatısı altında incelenmiştir. İlk olarak sanat başlığı altında yazarın romanlarında yer alan edebiyat, resim, müzik, heykel, mimari ve sinema ile ilgili ögeler hakkında bilgi verilmiş ve bu ögelerin Selçuk Altun’un romanlarındaki konumuna değinilmiştir. İkinci olarak bilim başlığı altında Selçuk Altun’un romanlarındaki arkeolojik ve tarihsel unsurlar incelenmiştir. Yapıtlarında ülkemizdeki arkeolojik eser hırsızlığının önüne geçilememesini eleştirmiştir. Böylece romanlarında arkeolojik eserler de yer almıştır. Sanat bölümündekine benzer bir yolla arkeolojik eserler hakkında da bilgi verilmiştir. Bilim başlığı altında arkeolojik eserlerden sonra tarihî olaylar incelenmiştir. Çalışmada yalnızca kültür tarihini etkileyen tarihî hadiseler sanat bölümündeki yol izlenerek ele alınmıştır. Üçüncü bölümün son alt başlığında Selçuk Altun’un romanlarında yer alan dinsel ögeler, kütüphaneler ve müzeler sıralanmış ve sonuç bölümüne geçilmiştir. Bu bölümde yazarın hangi amaçla romanlarını kültürel açıdan zengin kıldığı açıklanmıştır.Mr. Selçuk Altun (b.1950) is a novelist who published his first book in the begining of the year 2000. As of the year 2021, he already have written 10 novels. Since he fictionalised his narratorial charactors as intelligent, highbrowed people of having aesthetic pleasure, the literary and artistry contents are very rich in his works. This being the case, a study have been carried out with reference to the cultural resources of which were given high coverage in the author’s books. This study is comprised of 3 sections. In the first section information about his life and books has been given and novelism worked though. The root of the word ‘’culture’’and the changes of its meaning in time have been explained in section two as well as have been given different definitions of ‘’culture’’ that had been make by some intellectuals of societies of philosophy, antropology, sociology and literature on the basis of this definitions it has been decided on which titles the cultural resources would be examined. In section three, the cultural resources that were mentioned in Mr. Altun’s novels have been analysed under the titles of art, science, and others firstly, some information about literature, art, music, sculpture, architecture and cinema has been given with references to the stand points of such within the novels. Secondly archeological and historical elements under the title of ‘’science’’ have been examined. The author critised the failure to prevent smuggling of historical artifacts giving knowledge of some of those in his novels. Historical events that had influenced the cultural history were considered in a similar way as done under title ‘’art’’. Under the last subtitle of section three religious items, libraries and museums have been listed in reference to same that had been mentioned in the author’s novels. In the conclusion, the reasons of author’s fictionalising his novels very intensively on cultural elements has been explained
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