A logic programming framework for modeling temporal objects

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On the Harmonic and Hyperharmonic Fibonacci Numbers

In this paper, we study the theory of the harmonic and the hyperharmonic Fibonacci numbers. Also, we get some combinatoric identities like as harmonic and hyperharmonic numbers and we obtain some useful formulas for $\mathbb{F}_{n}$, which is finite sums of reciprocals of Fibonacci numbers. We obtain spectral and Euclidean norms of circulant matrices involving harmonic and hyperharmonic Fibonacci numbers

An Object memory for an object-oriented database management system

Ankara : The Department of Computer Engineering and Information Sciences and the Institute of Engineering and Sciences of Bilkent Univ. , 1988.Thesis (Master's) -- Bilkent University), 1988.Includes bibliographical references leaves 86-89.Object-oriented paradigm is an approach that can be applied in various areas of computing. In this approach, each entity is represented by an object which captures the state and the behaviour of the entity. In this thesis, a focused survey of object-oriented paradigm in general and object-oriented database management systems in particular has been carried out and an object memory module is designed and implemented for an object-oriented database management system prototype. The object memory module handles the representation, access and manipulation of objects in the system and provides the primitive functions that are necessary in the development of the prototype.Kesim, F NihanM.S

School Management During the Covid-19 Pandemic: A Qualitative Study

The aim of the research was to reveal the school management process during the COVID-19 pandemic. The research was designed on the basis of case study in qualitative research paradigm. Maximum variation sampling was used in the study. As such, 15 school principals with various years of experience, serving at various school levels were included in the study. Data was obtained from a semi structured interview form with 11 items. Inductive analysis was utilized in data analysis. The primary finding of the study was the precautions taken by school principals during the pandemic. These are physical precautions, informative precautions, and productive precautions. Another finding was that school principals made their best effort to fulfill their duties and responsibilities in-school, out of school, and regarding their leadership roles. Lastly, school principals problems mainly revolved around two groups: the resources of the school and students, and the decisions made, regarding educational and instructional processes

The usability of augmented reality in open and distance learning systems: A qualitative Delphi study

The main purpose of this research is to determine the usability of augmented reality in open and distance learning environments in accordance with universal design principles, and to make predictions for the future by gathering expert opinions on this subject using the Delphi technique. The Delphi technique was applied to 14 expert participants for 3 rounds as the primary data collection tool with open ended questions based on the theoretical framework. Structured interview questions were used as a secondary data collection tool and were applied during an academic exchange in China. In the Delphi technique used as the primary data collection tool, 92 themes were evaluated by experts and accepted as usability principles by end of this research. Therefore, 92 themes under 21 titles were presented for the use of augmented reality within the framework of universal design principles in open and distance learning. This research may be the first unique study on the usability of augmented reality not just as the convergence of this technology with open and distance learning environments but also incorporating the learning and communication dimensions of this convergence, thereby contributing to the literature of the field. It is imperative to determine the usability of augmented reality in open and distance learning, along with the “how” of this use in application. In this regard, the findings of this study are significant in shedding light to the enrichment, diversification and increased interaction of open and distance learning environments in accordance with universal design principles, bringing a new perspective to how a different technology convergence may be conducted, providing further accessibility

Akciğer malign tümörlerinde radyofrekans ve mikrodalga ablasyon yöntemleriyle tedavi etkinliğinin değerlendirilmesi

Bu çalışma retrospektif olarak tasarlanmış olup oligometastatik akciğer hastalığının ve primer akciğer tümörlerinin radyofrekans ve mikrodalga ablasyon ile tedavisini takiben, hastalıksız sağ kalım, toplam sağ kalım ve bölgesel nüks oranı gibi çeşitli parametreler vasıtasıyla etkinliğini belirleme, yan etkilerini karşılaştırma ve bu iki ablatif tedavi yöntemini birbiriyle kıyaslamak için oluşturulmuştur. Bölgesel nüks oranı, toplam sağ kalım, hastalıksız sağ kalım ve yan etki profili; radyofrekans ablasyon ve mikrodalga ablasyon için ayrı ayrı değerlendirilmiş ve karşılaştırılmıştır. İstatistik analizleri için SPSS programı kullanılmış olup Independent Samples Test, Two-Sample Kolmogorov-Smirnov Test, Ki-Kare testi gibi parametrik ve non-parametrik analiz yöntemlerine başvurulmuştur. Kasım 2008 – Mayıs 2015 tarihleri arasında Başkent Üniversitesi Tıp Fakültesi, Ankara Hastanesi, Radyoloji Anabilim Dalı, Girişimsel Radyoloji bölümünde; primer ve metastatik akciğer tümörü bulunan toplam 26 hastanın 40 tümörüne yönelik perkütan radyofrekans ve mikrodalga ablasyon tedavileri yapılmış ve yan etki profilini belirlemek ve varsa bölgesel nüksü tespit etmek, toplam ve hastalıksız sağ kalımı saptamak amacıyla hastaların medikal dosyaları ve radyolojik tetkikleri retrospektif olarak analiz edilmiştir. Bu çalışmaya dâhil ettiğimiz 26 hastanın 6 tanesi kadın 20 tanesi erkek olup yaşları 23-77 (58,78±11,24) arasında idi. 26 hastanın toplam 40 tümörü olup bunlardan 26 tanesine radyofrekans ablasyon, 14 tanesine mikrodalga ablasyon tedavileri uygulandı. Tümör boyutları 5 mm – 45 mm arasında olup (16,25 ±10,65 mm) 6 tanesi primer akciğer kanserlerine 34 tanesi ise metastazlara ait idi. Ortalama takip süresi 36,18±21,42 ay olup bu süre içerisinde 1 hastanın takip süreci hakkında yeterli bilgi olmadığı için çalışmadan çıkarılmış 8 hasta ölmüş ve 17 hasta da sağ olarak takiplerine devam etmekteydi. Ablasyon prosedürleri esnasında 4 hastada tedavi girişimi gerektiren major komplikasyon gelişmiş olup bunlardan 3 tanesi pnömotoraks 1 tanesi hemotoraks idi. Radyofrekans ve mikrodalga ablasyon tedavi yöntemleri bölgesel ilerlemeyi kontrol altına alarak, toplam sağ kalım ve hastalıksız sağ kalım sürelerini uzatarak akciğer tümörlerinin tedavisinde kendine çok önemli bir yer edinmiştir. Bu faydalarının yanında, düşük komplikasyon oranları ve hastanede yatış süresini diğer tedavi yöntemlerine göre oldukça kısaltması nedeniyle günlük pratikte gün geçtikçe kendine daha fazla yer bulmaktadır. This study designed retrospective to evaluate the efficiency of radiofrequency and microwave ablation of oligometastatic disease of lung and primary lung tumours. For this purpose, we analysed total survival, disease free survival and local reccurence parameters and beside it determined the complications of these procedures, compare each other by means of side effects. Local tumour progression, total survival, disease free survival and complication ratios are evaluated seperately for radiofrequency and microwave ablation compared with each other. Findings analyzed with SPSS software. Parametric and non-parametic tests are used for calculations such as Independent Samples Test, Two-Sample Kolmogorov-Smirnov Test, Chi-Square test and for the survival analyses Kaplan-Meier method. In this study, we included 26 patients with 40 lung tumours who has been under radiofrequency and microwave ablation procedures between October 2008 – May 2015 in the Başkent University Medical Faculty, Ankara Hospital, Radiology department, Interventional Radiology section. On the purpose of calculate the total and disease free survival, determine local tumour progression rates and complicatons of the procedures. Files of the patients are examined retrospectively. 6 women and 20 men of 26 patients were aged between 23-77 (58,78±11,24). 14 tumours were treated with microwave ablation and 26 tumours were treated with radiofrequency ablation. Tumour diameters were between 5 mm – 45 mm ( 16,25 ±10,65 mm) and 6 of 40 were primary lung cancers and 34 of 40 were metastases of other cancers which were dominantly primary colorectal cancers. Median follow-up was 36,18±21,42 month. Just 1 patient had stopped follow-up and therefore we excluded him from the study. 8 patients died between this perid and 17 patients still in follow-up currently. During the ablation procedures 4 major complications occured which are necessitate curative atempt. 3 of 4 was pneumothorax and 1 of 4 was hemothorax Radiofrequency and microwave ablation procedures are very effective for the treatment of the lung tumours by controlling the local progression, increasing the total and disease free survival of patients. Under favour of all these benefits, with low complicaton rates and lesser hospitalisation period, these procedures get more place in the daily practice of the treatment of lung tumours day by day

United States mediation in the post Cold-War era: three case studies

Ankara : Department of International Relations of Bilkent Univ., 1997.Thesis (Master's) -- Bilkent University, 1997.Includes bibliographical references leaves 102-104This study aims to compare and contrast the United States’ mediation attempts in the Bosnian conflict, in Palestinian-Israeli and Haitian conflicts. For this purpose, the following components of the literature on mediation are utilised as the analytical tools of this thesis: The power of the mediator, stakes of the mediator, roles played by the mediator, entry and timing of the mediator. In addition, certain indicators are chosen; namely, the relative power of the parties, redistribution of resources, policy or position changes, duration of the conflict, establishment of ongoing mechanisms, the use of media in order to observe the changes realised during or as an outcome of the mediation attempts. According to the analyses of these three mediation attempts, this thesis reveals that “mediation” stands as an important foreign policy making tool of the United States in the Post Cold-War era. In addition, this study underscores the importance of mediator’s power in international mediation attempts. Ill Lastly, the study intends to make a contribution to the literature on mediation through defining a new concept called indirect mediation.Kesim, TubaM.S

Layer thickness and period as design parameters to tailor pyroelectric properties in ferroelectric superlattices

We theoretically examine the pyroelectric properties of ferroelectric-paraelectric superlattices as a function of layer thickness and configuration using non-linear thermodynamics coupled with electrostatic and electromechanical interactions between layers. We specifically study PbZr0.3Ti0.7O3/SrTiO3 superlattices. The pyroelectric properties of such constructs consisting of relatively thin repeating units are shown to exceed the pyroelectric response of monolithic PbZr0.3Ti0.7O3 films. This is related to periodic internal electric fields generated due to the polarization mismatch between layers that allows tailoring of the shift in the transition temperature. Our results indicate that higher and electric field sensitive pyroresponse can be achieved from layer-by-layer engineered ferroelectric heterostructures