327 research outputs found
A novelty optimization approach for drilling of CFRP nanocomposite laminates
No full textNumerous problems are encountered in drilling of carbon fiber-reinforced polymer composite materials (CFRP) such as delamination, tool wear etc. Delamination has been recognized as a major damage encountered when drilling composite laminates. In the present study, machinability and the effects of cutting speed and feed rate upon thrust force and delamination formation in carbon nano tube (CNT)-added carbon fiber-reinforced plastics (CFRP) and CFRP were investigated. With this purpose, the experiments were planned. The response surface analysis has been carried out to study the main and the interaction effects of the machining parameters. By using the Taguchi method, cutting parameters' degrees of influence were determined. A new multi-objective optimization for the appropriate drilling process of these composite materials was proposed and an analytical optimization technique was applied. Appropriate cutting parameters of thrust force and delamination factor were found and the optimization results showed that the combination of low feed rate with high cutting speed is necessary to minimize delamination in drilling of CFRP.The machinability refers to the relative ease or difficulty under certain cutting conditions. So, it is very important to understand the factors that affect the machinability and to evaluate their effects. Machinability of Epoxy/CF and CNT-Epoxy/CF was investigated. It was aimed to evaluate the machinability of these materials. A new machinability index has been developed in current study. It was found out that machinability of Epoxy/CF is better than CNT-Epoxy/CF.Selcuk University Manufacturing System Automation and Computer Aid Design and Production Research and Application Center; BAP Office; Turkish Scientific Research InstitutionThe authors wish to acknowledge Selcuk University Manufacturing System Automation and Computer Aid Design and Production Research and Application Center and BAP Office with the Turkish Scientific Research Institution for the support and contribution
ÖĞRENEN ÖRGÜTLERİN OLUŞTURULMASINDA ÜST KADEME YÖNETİCİLERİN ROLÜ
No full textBu çalışmada öğrenen örgütlerin oluşturulmasında üst kademe yöneticilerinin rolü ve görevleri tartışılmıştır. Öğrenen örgütler bilgiyi elde etme, elde edilen bilgiyi farklı yönetim kademelerine aktarma ve edinilen bilgiyi kullanarak örgütü sürekli yenileme becerisine sahip kurumlardır. Bunun sağlanabilmesi için üst kademe yöneticilere önemli görevler düşmektedir. Çalışmadan çıkan en önemli sonuç üst kademe yöneticilerin bu süreçteki rollerini iyi bilmelerinin yanında bu rolleri yerine getirebilmek için gerekli olan becerilere de sahip olmaları gerektiğidir. Bunun başarılabilmesi için de üst kademe yöneticilerinin sürekli olarak eğitilmeleri ve geliştirilmeleri gerekmektedir. Çalışmada bu konular hakkında ayrıntılı tartışmalar yapılmış ve bu alanda uygulamada ve gelecekte yapılacak çalışmalar konusunda önerilerde bulunulmuştur
New formulae for Zagreb indices
No full textInternational Conference on Numerical Analysis and Applied Mathematics (ICNAAM) -- SEP 19-25, 2016 -- Rhodes, GREECEIn this paper, we study with some graph descriptors also called topological indices. These descriptors are useful in determination of some properties of chemical structures and preferred to some earlier descriptors as they are more practical. Especially the first and second Zagreb indices together with the first and second multiplicative Zagreb indices are considered and they are calculated in terms of the smallest and largest vertex degrees and vertex number for some well-known classes of graphs.Uludag UniversityUludag University [F-2015/17, F-2015/23]; Selcuk UniversitySelcuk UniversityThe first author was supported by the Research Fund of Uludag University project no: F-2015/17, F-2015/23. The last author is supported by Selcuk University Research Fund
FASIH AHMED DEDE'S MASNAVI BEHIST-ABAD
No full textIn this article, 17th century Mevlevi poet Fasih Ahmed Dede's masnavi Behis-abad the copies of which was not detected so far was introduced. Masnavi written at 1698, was prepared as traditional mesnevi arrangement. In this moral mesnevi which consists of 1229 couplet; the themes are about real friendship and fidelity. Besides, the author focused on the form and content features of the masnavi
Copies of the poem siret written by Muhammad in the XVth century-I
No full text"Siret", more commonly called "siyer", is the general name of the works on the life of the Prophet. At first, the word "siret", which was used for such works, was commonly used as "siyer". "Siret / siyer", whose first examples were in Arabic literature, begins to be seen in Turkish literature in XIVth century. First known in Turkish literature is Siretuzn-nebi, written in verse and prose by Darir in the second half of the XIVth century. the first example of what is known today is the Siret, which is a subject written by an author named Muhammed in the XVth century. the work is around 15,500 couplets. the fact that there are many archaic words in the book makes it important for Turkish language and literature. From the beginning of 872[1467] when Siret was written, many copies and stone print have been made. This shows that it has been loved and read a lot. However, none of the sixty-nine copies identified yielded the work of Muhammad's style. It is seen that some copiers and stone printers of Siret put their names by removing the name of the author. It is understood that a change of this kind is due to the desire to own the work. in this article, the copies of Siret will be introduced in Turkey and abroad. the evaluation of the studies and copies will be the subject of the next article
CORRUPTED MAGIC TO ENCHANT THE WORLD
No full textIn this study, a book about Corrupted Magic to enchant the world which was written by George Ritzer, is introduced. A life centered on the axis of consumption of the modern era is the general subject of the book. We are in an ongoing cycle consumption consumption by author said that we live in society. An environment for consumption of social life at every moment being created. A continuous consumption of the community with new tools withdrawal consumption is concerned. Fashion, brand, advertising and consumption with luxury elements is kept alive each year
A LITERARY GENRE UNKNOWN SUFFICIENTLY IN THE CLASSICAL LITERATURE: RUZNAME AND AN EXAMPLE OF IT BY AN UNKNOWN AUTHOR
No full textClassical Turkish literature is a kind of literature which based on poetry. Almost everything that is meant to be told in this literary traditon has been expressed in verse. For this reason, many different genres which include different subjects were written up in poetic way. In this study, an example of the type of ruz-name, which is rarely encountered and less known in the classical literture tardition, is discusssed. The word ruz-name, which means daily writing in Persian, has been used in Turkish historyand culture to cover more than one different genre in different fields. One of them is a literary genre that is about to days of the month or week, in which mentions what is genarally good to do and what is bad to do in these time periods.In this ruz-name, which were analysed, seven days of the week were discussed. In ruz-name daytimes were divided into seven parts; dawn, mid-morning, decadence of day, midday, interval between two prayers, mid-afternoon and sunset. Nighttime also divided into seven parts; occident, evening, ishareyn, midnight, suluseyn, sulusurl-ahir and aurora. By telling which celestial body is dominant on which day of the week at these time periods, the auspicious and omnious deeds at that time are explained
Algorithms for generalized nonregular scheduling problems.
No full textOn-time delivery and meeting due dates are important performance measures in modern production systems. In the machine scheduling literature most studies employ regular objective functions with tardiness penalties to address these goals. There are also studies which consider nonregular objective functions involving penalties for both earliness and tardiness. However, these studies usually address single-machine and parallel machine problems.;In this dissertation we focus on a class of generalized dynamic nonregular scheduling problems in multi-machine production environments. We consider a total weighted earliness and tardiness objective function at the operation level and we allow distinct release times, due dates, and earliness and tardiness penalties for each operation.;This problem is strongly NP -Hard, thus any approach for finding an optimal solution is likely to become computationally intractable in most practical situations. We propose and test several heuristics for this problem. We develop an adjacent pairwise interchange neighborhood which is a generalization of a well-known compact search neighborhood for the classical job shop problem. This is an important theoretical development since it establishes a relationship between the regular and nonregular scheduling problems. We propose several other heuristic solution methods including Lagrangian relaxation and local search algorithms with local minima escape mechanisms. We also present a new local search algorithm that combines important features of other well-known local search methods.;We test our heuristics on randomly generated instances of the total weighted earliness and tardiness job shop problem, and on a set of benchmark instances for the total weighted tardiness job shop problem from the literature. We present our computational results and related observations on different solution methods and problem classes. We observe that our heuristic methods produce very good solutions in relatively small CPU times. In particular we find that on the total weighted tardiness job shop problem our heuristics yield results comparable to a state-of-the-art shifting bottleneck procedure from the literature. This is a remarkable finding since our heuristics are designed for a more general class of scheduling problems and do not take advantage of problem structures that are readily available in the total weighted tardiness problems
ODES OF BEYANI-ZADE AYANI
No full textOttoman Intellectuals were generally interested in poetry no matter what their professions were. Some of them proceeded to produce poetry and prepare their own "Divans" or "Divance" (anthology of poems), while the poems of the poets who did not have enough poems to compile a divan were either lost or remained scattered here and there. "Beyani-zade Ayani", too, was one of our poets who could not constitute a "Divan" or "Divance". Here, as a result of our investigations, we have found poems by Ayani, who we presume to be the son of Beyani Effendi, author of a collection of biographies, in a journal including 262 couplets composed of 47 odes, 2 stanzas and 5 couplets (mufred) and we present them to the attention of researchers. We think that Beyani-zade Ayani, who is understood to have an elevated sense of poetry, might have other peoms, too
WILHELM SCHMIDT’TE AVCI-TOPLAYICILARIN TEK TANRICILIĞI
No full textP.Wilhelm Schmidt, etnolojinin esas görevinin, insanlığın başlangıcına yaklaşmak ve insanlığın en eski dinini de keşfetmek olduğu düşüncesini sürdürürken etnoloji bilimine de bir görev yüklemektedir. Çünkü Schmidt’e göre etnoloji insanlığın maddi kültür öğelerinin yanında, dini öğeleri de incelemelidir. Etnoloji içerisinde kültür tarihi ekolü, insanlığın en eski kültür aşamasının avcı-toplayıcılar olduğunu bulmuştur. Bu avcı-toplayıcıkültürler aynızamanda Schmidt’e göre, insanlığın en eski dinini temsil edebileceğini kabul etmektedir. Schmidt, dünyanın dört bir tarafına yayılmışolan bu kültürlerde dini benzer öğeleri genişbir analizden sonra ortaya koymuştur. Bu ilkel kültürlerdeki temel ortak özellik yüce varlık inancının hakim olmasıdır. Bu Yüce Varlık yaratıcıdır. Ama aynızamanda ahlaki kanunlar koyan ve bu kanunlara insanların uymasınıisteyen bir yüce varlıktır. Bu insanlar Yüce Varlık’a dua,kurban ve seremonilerle yaklaşmaktadırlar
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