27 research outputs found
Investigations on the parent compounds of Fe-chalcogenide superconductors
Get PDFThis work is focused on the parent compounds of the Fe-chalcogenide superconductors. For this purpose poly- and single-crystalline forms of tetragonal β-FexSe, Fe1+yTe, Fe1+yTe1-xSex and Fe(1+y)-xMxTe (M = Ni, Co) have been prepared. Second focal points of this study are the low-temperature structural phase transitions and physical property changes in tetragonal Fe1+yTe which are induced by composition, external pressure, and cationic substitution
Homogeneity Range of Ternary 11-Type Chalcogenides Fe1 + y Te1−x Se x
Get PDFThe 11-type Fe-chalcogenides belong to the family of Fe-based superconductors. In these compounds, the interstitial Fe is known to strongly influence the magnetic and superconducting properties. Here, we present the chemical homogeneity range of ternary compounds Fe1 + yTe1−xSex based on powder x-ray diffraction, energy dispersive x-ray analysis, and magnetization measurements. Our investigations show that the maximum amount of excess Fe in homogeneous Fe1 + yTe1−xSex decreases with increase in Se substitution for Te. Using our synthesis procedure, single-phase Fe1 + yTe1−xSex, with 0.5 ≤ x < 1 could not be formed for any amount of excess Fe. Further, the superconducting volume fraction in the material is found to be strongly suppressed by excess Fe
Na3[ BN2] and Na2K[ BN2]: A Known and a Novel Alkali Metal Dinitridoborate Obtained via Mild Thermal Dehydrogenation
No full textÖz bulunamadı
]: A Known and a Novel Alkali Metal Dinitridoborate Obtained via Mild Thermal Dehydrogenation.
No full textGAZETECİ SUAT DERVİŞ’TEN ROMANCI SUAT DERVİŞ’E: FOSFORLU CEVRİYE’Yİ RÖPORTAJLAR ÜZERİNDEN OKUMAK
No full textSon yıllarda edebiyat araştırmacılarının üzerinde önemle durduğu isimlerden biri hâline gelen Suat Derviş’in eserlerini yorumlarken onun hayata bakışını ve sanat anlayışını şekillendiren gazeteci kimliğinden ve gazetelerdeki yazılarından bahsetmek gerekir. Bu yazılar içerisinde bilhassa gazetelerde yayımladığı röportajlar önem arz etmektedir. Suat Derviş’in gazeteci kimliğiyle gördüğü, karşılaştığı olayları, tanıştığı insanları röportajlarına taşıdığını, dolayısıyla bu röportajları kurgusal eserlerinde gerek karakterleri oluştururken gerekse olayı şekillendirirken pek çok kez kullandığını söylemek mümkündür. Onun hem gazeteci kimliğini hem de sanatçı muhayyilesini şekillendiren bu röportajlar vesilesiyle İstanbul’un arka sokaklarına kadar inerek halkın nabzını tutan yazar, yine bu röportajlar sayesinde edindiği deneyimleri eserlerinde malzeme olarak kullanmıştır. Bu bağlamda ilk olarak 1945 yılında Gece Postası gazetesinde tefrika edilen Fosforlu Cevriye romanı da Suat Derviş’in yaptığı röportajlardan beslenerek yazılmış bir romandır. Dolayısıyla bu yazıda öncelikle uzun yıllar gazetecilik yapan Suat Derviş’in gazeteci kimliği üzerinde durulacak, ardından Fosforlu Cevriye, yazarın yaptığı röportajlar çerçevesinde yorumlanacaktır.When interpreting the works of Suat Derviş, who has become one of the names that literature researchers have emphasized, in recent years, it is necessary to mention her journalist identity that shaped her view of life and her understanding of art and her articles in newspapers. Among these articles, especially the interviews she published in newspapers are important. It is possible to say that Suat Derviş, as a journalist, carried the events she saw, the people she met, to her interviews, and therefore she used these interviews many times in her fictional works, both when creating the characters and shaping the event. Through these interviews, which shaped both her journalist identity and her artistic imagination, the author, who went down to the back streets of İstanbul, used the experiences she gained through these interviews as material in her works. In this context, the novel Fosforlu Cevriye, which was first serialized in the newspaper Gece Postası in 1945, is also a novel written based on Suat Derviş’s interviews. Therefore, this article will primarily focus on the journalist identity of Suat Derviş, who has been a journalist for many years, and then Fosforlu Cevriye will be interpreted within the framework of the author’s interviews.</p
THE VEHICLE ROUTING PROBLEM WITH SIMULTANEOUS DELIVERY AND PICK-UP WITH MATERIAL FLOWS AMONG CUSTOMERS AND HEURISTIC SOLUTION
No full textEs zamanlı dagıtım ve toplama yapılan araç rotalama problemleri ile toplama ve dagıtım problemlerinin bilesimi olan, müsteriler arası malzeme akıslı es
zamanlı dagıtım-toplama araç rotalama problemi, malzemenin depodan talep eden müsterilere tasınması, buradan aynı zamanda depoya ve diger müsterilere
gidecek malzemelerin de alınarak, toplam katedilen yolu en küçük yaparak depoya dönen araç/araçların rotaların bulunması olarak tanımlanabilir.
Bu tezde, yeni bir problem olan müsteriler arası malzeme akıslı es zamanlı dagıtım-toplama araç rotalama probleminin tanımı yapılarak, çözümüne
yönelik sezgisel bir algoritma önerilmistir. Önerilen algoritma MATLAB kullanılarak kodlanmıs ve tarafımızdan türetilen 60 adet test örnegi, Dethloff
tarafından gelistirilen dört farklı müsteri ekleme kriteri ile çözülmüstür.The vehicle routing problems with simultaneous delivery and pick-up and
material flows among customers is the combination of the vehicle routing
problem with simultaneous delivery and pick-up and the pickup and delivery
problems. In these problems, custumers are able to send materials to each other.
In daily life, we are confronted with this problem. For exemple, a hypermarket
has to transport not only the materials initially available at its depot to its
agencies as well as those from the agencies to the depot, but also extra materials
available at their agencies to each other because of demand fluctuations.
In this thesis, the vehicle routing problem with simultaneous delivery and pickup
and material flows among customers has been defined, a new heuristic
algorithm has been suggested to solve this type of problems, an MATLAB codes
of the proposed algorithm have been developed, and finally 60 author-generated
test instances have been solved using four different insertion criterion in the
literature
Influence of disorder on the signature of the pseudogap and multigap superconducting behavior in FeSe
No full textWe investigated several FeSe single crystals grown by two different methods by utilizing experimental techniques, namely, resistivity, magnetoresistance, specific heat, scanning tunneling microscopy, and spectroscopy. The residual resistivity ratio (RRR) shows systematic differences between samples grown by chemical vapor transport and flux vapor transport, indicating variance in the amount of scattering centers. Although the superconducting transition temperature T-c is not directly related to RRR, our study evidences subtle differences in the features of an incipient ordering mode related to a depletion of density of states at the Fermi level. For instance, the onset temperature of anisotropic spin fluctuations at T* approximate to 75 K, and the temperature of the opening up of a partial gap in the density of states at T** approximate to 30 K, are not discernible in the samples with lower RRR. Further, we show that the functional dependence of the electronic specific heat below 2 K, which allows us to determine the nodal features as well as the small superconducting gap, differs significantly in crystals grown by these two different methods. Our investigation suggests that some of the controversies about the driving mechanism for the superconducting gap or its structure and symmetry are related to minute differences in the crystals arising due to the growth techniques used and the total amount of scattering centers present in the sample
From mansions to streets: Interviews, stories and novels by Suat Derviş
No full textBu çalışma, ilk gençlik yıllarından ölümüne kadar, yaşamının yarım asıra yakın bölümünde hem edebiyatçı hem de gazeteci kimliğiyle varlık gösteren ancak dev külliyatına rağmen göz ardı edilen, yaşadığı dönemde hak ettiği değeri görmediği düşünülen Suat Derviş'i; edebiyat sosyolojisi perspektifiyle incelemeyi amaçlamıştır. 1930'ların sonuna değin şahsi konuları işleyen yazarın bu dönemden sonra topluma yönelmesindeki gerekçeleri anlamak adına hem yaşamının hem de gazeteci kimliğinin eserleri üzerindeki etkisi üzerinde durulmuştur. Bu amaç doğrultusunda giriş bölümünde edebiyat sosyolojisi alanına dair genel bir bilgilendirme yapılarak çalışma alanı netleştirilmiştir. Birinci bölümde Suat Derviş'in yaşamı, sanatı ve eserlerine değinilmiş; ikinci bölümde Türk romanının gelişim seyrine ve Toplumcu Gerçekçi yaklaşıma yer verilmiş, üçüncü bölümde ise Suat Derviş'in gazeteci kimliğiyle 1935-1937 yılları arasında Son Posta, Cumhuriyet ve Tan gazetelerinde yaptığı röportajları, bunlarla aynı dönemde kaleme aldığı ve çeşitli gazetelerde tefrika ettiği bazı hikayeleri ve toplumcu ögelerin baskın olduğu Bu Olan Şeylerin Romanıdır, İstanbul'un Bir Gecesi, Fosforlu Cevriye ve Ankara Mahpusu adlı romanları incelenmiştir.This study aims to analyze Suat Derviş, who existed as both a literary writer and a journalist for nearly half a century of her life, from her early youth until her death, but who was ignored despite her huge oeuvre and who was thought to have been underappreciated during her lifetime, from the perspective of sociology of literature. In order to understand the reasons why the author, who dealt with personal issues until the end of the 1930s, turned towards society after this period, the impact of both her life and her journalist identity on her works was tried to be understood. For this purpose, the introduction provides a general information about the field of sociology of literature and clarifies the field of study. In the first part, Suat Derviş's life, art and works are discussed; in the second part, the course of development of the Turkish novel and the Socialist Realist approach are discussed; and in the third part, Suat Derviş's interviews conducted in the newspapers Son Posta, Cumhuriyet and Tan between 1935 and 1937 as a journalist, some of her stories written in the same period and published in various newspapers, and her novels Bu Olan Şeylerin Romanıdır, İstanbul'un Bir Gecesi, Fosforlu Cevriye and Ankara Mahpusu, in which socialist elements are dominant, are analyzed
