56 research outputs found
Design of a linear quadratic gaussian controller for a manufacturing process
No full textYurtseven, Murat Kudret (Dogus Author), Ağaran, Berrin (Dogus Author)In this study, the design procedure and the performance analysis of a linear quadratic gaussian controller (LQGC) are presented. The controller is expected to regulate the production–inventory process of a manufacturing system along a pre-determined trajectory within the plant hierarchical control system; the hierarchical control structure is also described briefly in this chapter. The LQGC is based on a dynamic, discrete-time, and a stochastic model, aggregating products, and production processes. The simulation results show that the LQGC is well -suited for the intended purpose
A model for assessing the effect of new technologies on production
No full textYurtseven, Murat Kudret (Dogus Author) -- Conference full title: PICMET '01 : Portland International Conference on Management of Engineering and Technology : proceedingsThe model presented in this study has been adopted from the control engineering field. Its purpose is to allow system designers or engineers to view a complex production process in an abstract and a compact form so that they can easily assess the effect of introducing new technologies and organizational forms into productio
Design of computer-based manufacturing systems and cognitive systems engineering
No full textYurtseven, Murat Kudret (Dogus Author) -- Conference full title: 2001 Portland International Conference on Management of Engineering and Technology: Portland, Oregon, USA, July 29 - August 2, 2001.In this paper, the authors address some of the shortcomings of the traditional approaches to manufacturing system design and discuss how the design process can be improved through the perspective of cognitive systems engineering (CSE). Most of the literature on the design, adoption and implementation of these, systems deal with the technological aspects of the problem, but not so much with the organizational, political and social issues
TEMPERATURE DEPENDENCE OF THE RAMAN FREQUENCIES OF AMMONIA SOLID II
No full textAuthor Institution: Department of Physics, Istanbul Technical UniversityWe calculated here the Raman frequencies for the translational mode and the librational mode of ammonia solid II as a function of temperature for some fixed pressures. Our calculated Raman frequencies were obtained by means of the Gr\""{u}neisen relations using the volume data given in the literature. Our calculated frequencies for those phonon modes of ammonia solid II are in very good agreement with those measured experimentally
Educational elements in the stories of Reşat Nuri Güntekin
No full textYüksek Lisans TeziCumhuriyet öncesi ve sonrası Türk edebiyatının önde gelen yazarlarından olan Reşat Nuri Güntekin roman, tiyatro, hikâye ve gezi yazısı türlerinde eserler vermiştir. Yazar, romancı kimliği ile ön plana çıksa da hikâyeci kimliği de vardır. Çalışmada, Reşat Nuri Güntekin'in hikâyelerindeki eğitim unsurları ele alınmıştır. Reşat Nuri Güntekin, Türk edebiyatının önemli yazarları arasındadır. Sanatçı, asıl mesleği olan öğretmenliği ikinci plana atmamıştır. Uzun yıllar millî eğitimin farklı kademelerinde çalışan Güntekin öğretmenlik, müdürlük, müfettişlik ve Unesco temsilciliği yapmıştır. Bu sebeple eserlerinde mesleğinin izleri geniş yer tutmaktadır. Reşat Nuri Güntekin'in eserlerinden yola çıkarak öğretmenliğe başladığı 1912 yılından emekli olduğu 1954 yılına kadar olan dönemin eğitim anlayışı, Güntekin'in konu ile ilgili görüş düşünce ve eleştirileri hakkında da bilgi edinmek mümkündür. Öğretmen-yazar olan Güntekin, eserlerini yazdığı dönemde toplumdaki sorunları, aksaklıkları, Anadolu insanının formal ve informal eğitim anlayışını eserlerinde işlemiştir. Bu yönüyle onun eserleri eğitim konusunda yaşanan aksaklıklar, toplumun eğitime bakışı gibi konular hakkında bilgi vermesi açısından da önemlidir. Yazarın hikâyeleri de romanları kadar önemlidir. Toplumun her kesiminden insanları hikâyelerinde işleyen Güntekin, bu insanların sorunlarını ve bu bağlamda dönemin sorunlarını ele almıştır. Reşat Nuri Güntekin'in aile kavramına bakışı, eğitim sorunları hakkındaki düşünceleri ve sunduğu çözüm önerileri de hikâyelerine yansımıştır. Reşat Nuri Güntekin'in eserleri ile ilgili yapılan çalışmaların önemli bir kısmı yazarın romanları ve romancı kimliği üzerinedir. Bazı çalışmalar sanatçının eğitimci yönünün kapsasa da, söz konusu çalışmalar romanlarla sınırlıdır. Sanatçının hikâyeciliği ile ilgili çalışmalar genel çerçevede, yapı ve tema incelemeleridir. Bu çalışmayla Reşat Nuri Güntekin'in hikâyelerinde yer alan eğitim unsurlarının tespit edilmesi, eserlerin yazıldığı dönemde halkın eğitim anlayışı, eğitimde yaşanan sorunlar, yazarın eğitime dair meseleleri eserlerine nasıl yansıttığı tespit edilmeye çalışılmıştır. Hazırlamış olduğumuz bu çalışmada örneklem; Reşat Nuri Güntekin'in kendisi tarafından yayımlamış olan Tanrı Misafiri, Sönmüş Yıldızlar, Leyla ile Mecnun, Olağan İşler, Eski Ahbap adlı hikâye kitaplarıdır. Bu kitapların içinde yer alan yüz sekiz hikâye taşıdığı eğitim unsurları açısından incelenmiştir. Yapılan çalışmada yazarın eserlerinde eğitim konusuyla ilgili meseleleri, aile ve okul üzerinden işlediği görülmüştür. Ahlak kavramını da ele alan yazar bunu, aldatılan ve dolandırılan insanlar üzerinden işlemiştir. Yeni kurulan devletin ilke ve inkılaplarını benimseyen yazar toplumun dinî duygularını suiistimal eden din adamlarını eserlerinde işlemiş ve kurguladığı ideal kahramanlar aracılığıyla gelenek ve din eleştirisi yaparken yeni devletin ilke ve inkılaplarını da halka tanıtmıştır. Bunun yanında yazarın eğitime ve eğitimcilere eleştirel bir gözle baktığı ve eğitim sorunlarını eserlerinde işlediği görülmüştür. Bu nedenle Reşat Nuri Güntekin'in eserleri edebiyatımızda eğitim açısından önemli bir yere sahiptir.Reşat Nuri Güntekin, one of the leading writers of Turkish literature before and after the Republic, has produced works in the genres of novel, theater, story and travel writing. Although the author comes to the fore with his novelist identity, he also has a storyteller identity. In this research, educational elements in the stories of Reşat Nuri Güntekin were discussed. Reşat Nuri Güntekin is among the important writers of Turkish literature. The artist did not put teaching, which is his main profession, into the background. Güntekin, who has worked at different levels of national education for many years, has worked as a teacher, manager, inspector and Unesco representative. For this reason, the traces of his profession occupy a large place in his works. Based on the works of Reşat Nuri Güntekin, it is possible to obtain information about the educational understanding of the period from 1912, when he started teaching, to 1954, when he retired, and about Güntekin's views, thoughts and criticisms on the subject. Güntekin, who is a teacher-writer, handled the problems in the society, the troubles and the education of the Anatolian people in his works. In this respect, his works are also important in terms of giving information about the problems experienced in education and the society's view of education. The author's stories are as important as his novels. Güntekin, who deals with people from all walks of society in his stories, discussed the problems of these people and the problems of the period in this context. Reşat Nuri Güntekin's view of the concept of family and his thoughts on education problems and the solutions he offered were also reflected in his stories. An important part of the studies on the works of Reşat Nuri Güntekin are on the novels of the author and his novelist identity. Although some studies cover the educational aspect of the artist, these studies are limited to novels. Studies on the artist's storytelling are generally structure and theme studies. With this study, it has been tried to determine the educational elements in the stories of Reşat Nuri Güntekin, the understanding of education of the people at the time the works were written, the problems experienced in education, and how the author reflected the issues related to education in his works. In this study we have prepared, the sample is; Published by Reşat Nuri Güntekin himself, these are the story books called The Guest of God, Extinct Stars, Leyla and Majnun, Ordinary Jobs, Old Dude. One hundred and eight stories in these books were examined in terms of educational elements. In the study, it has been seen that the author deals with the issues related to education in his works, through family and school. The author, who also deals with the concept of morality, processed it through people who were deceived and swindled. Adopting the principles and reforms of the newly established state, the author treated the clergy who abused the religious feelings of the society in his works and introduced the principles and reforms of the new state to the public while criticizing tradition and religion through the ideal heroes he fictionalized. In addition, it has been seen that the author looks at education and educators with a critical eye and deals with educational problems in his works. For this reason, the works of Reşat Nuri Güntekin have an important place in our litareture in terms of education
CALCULATION OF THE RAMAN FREQUENCIES OF AMMONIA NEAR THE MELTING POINT
No full textAuthor Institution: Department of Physics, Istanbul Technical UniversityWe have studied here the volume dependence of the Raman frequencies in ammonia solid I. By means of the values of the Gr\""{u}ncisen parameter obtained in the range between 195K and 172.8K, we used the volume data from the literature to calculate the Raman frequencies for two translational modes and for a librational mode in ammonia solid I. Similarly, the Raman frequencies of those modes can also be calculated using the volume data in ammonia solid II. This then enables us to predict the Raman frequencies near the melting point in ammonia
CALCULATION OF THE MOLAR VOLUME AS A FUNCTION OF PRESSURE FROM THE RAMAN FREQUENCIES IN NHBr
No full textAuthor Institution: Department of Physics, Middle East Technical University, 06531 Ankara, TURKEYThe molar volume is calculated as a function of pressure using the observed Raman frequencies of the TA (57 cm) and TO (140 cm) modes of NHBr in the disordered phase II. This calculation is performed through the mode Gruneisen parameter which is taken as a constant for each mode studied throughout the phase II of this crystal. Measurements of the lattice parameter (molar volume) can be performed to examine our calculations from the Raman frequencies studied here for NHBr
Addressing silicone ventriculoperitoneal shunt hypersensitivity with teflon sheets: a case report
No full textVentriculoperitoneal (VP) shunts, used to treat hydrocephalus, can sometimes cause hypersensitivity reactions to silicone, necessitating repeated surgical interventions. Traditional management involves replacing silicone with alternatives like polyurethane, which have limitations. This study presents a novel approach using Teflon (PTFE) sheets to cover the silicone valve surface. A 22-year-old male with a history of multiple shunt surgeries and wound revisions was admitted for wound dehiscence, suspected to be due to a late hypersensitivity reaction to silicone. The shunt valve and cranial entry point were wrapped in Teflon PTFE felt sheets, and the wound was closed with propylene sutures. The patient was treated with methylprednisolone and discharged after three days. Follow-up showed complete wound healing within a month, and the patient remained revision-free for ten years. This case suggests that Teflon sheets may offer a promising approach for managing silicone hypersensitivity in VP shunts, though further studies are needed to determine its broader applicability
RAMAN FREQUENCY SHIFTS CLOSE TO THE -PHASE TRANSITION IN THE NHBr
No full textAuthor Institution: Department of Physics, Middle East Technical University 06531; Ankara-TurkeyThe critical behavior of the frequency shifts for the Raman modes of (56 cm) and (1684 cm) in NHBr is analyzed here close to the -phase transitions (TK, P=0) in this crystalline system. Values of the critical exponent associated with the critical behavior of the frequency shifts are deduced for T<T and TT in NHBr. Our exponent values can be compared with those obtained experimentally for the specific heat C and the thermal expansivity close to the -phase transition in NHBr
- …
