76 research outputs found

    Industrial Design Education: A Research on Generation Theories and Change in Turkey

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    Due to their birth at the same time interval, according to the generation theories based on the idea that the individuals who were exposed to the same social, historical, and cultural events and thus have common experiences, similar attitudes to similar thoughts and behaviors, nowadays five generations, which are the Silent Generation, Baby Boomer, X, Y and Z Generations, live together. Each of these generations exhibits different tendencies in matters of work, family, and education because they encounter with different historical events, social relations and technological developments that help to see and make sense life from a different angle. Considering the individual who performs the design action and is affected by it, and relationship with the social structure due to the nature of the design, it is thought that generational differences will create similar differences in the approach to design action. Therefore, design education as a reflection of design practice will be affected by this difference. Thus, in this study to examine the change dynamics of industrial design education in Turkey within generations theories, in-depth interviews were conducted with different generations’ lecturers working in departments of industrial design in Turkey and data were compared within the framework of generations’ theories. As a result of the study, it was seen that changes in education parallel with characteristics of the generations due to changes of the generation of both the lecturers and the students. It also put forward the importance of being able to create a structure of education that is open to support changes

    A Lagrange Polynomial Chebyshev Pseudo Spectral Time Domain Method in One Dimensional Large Scale Applications

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    Abstract Pseudo Spectral Time Domain method based on Discrete Fourier series has been widely used in computational electromagnetics. However, this method has some disadvantages such as, the Gibbs phenomena, source conditioning and errors due to interpolation and staircase modeling of complex objects. To overcome these limitations, a Lagrange Polynomial Chebyshev Pseudo Spectral Time Domain method has been proposed. In this work, the efficiency of this method for large scale problems is examined in the sense of numerical dispersion errors (accuracy) by solving one dimensional wave equation in a simple medium. The numerical results are compared for validation with the analytical solution and standard Finite Difference Time Domain method solution. Introduction Spectral Time Domain methods are a generalization of separation of variable techniques in the time domain. They are favorable when direct analytical time domain solution is desired Two fundamental steps in the PSTD method are to choose type of interpolation function and collocation points. Although different versions of the PSTD methods are present in the literature of different scientific disciplines, Fourier Pseudo Spectral Time Domain (F-PSTD) method is widely used in numerical electromagnetic problems In order to overcome these difficulties, a Lagrange Polynomial Chebyshev Pseudo Spectral Time Domain method is considered in this wor

    A retrospective evaluation of bifid mandibular canal prevalence of Southeastern Anatolia population by cone-beam computed tomography

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    Introduction: Bifid mandibular canal (BMC) is often detected incidentally on radiological examination and can be observed in unilateral or bilateral forms. The correct localization of the BMC plays an important role in the prevention of complications such as paresthesia, anesthesia, bleeding, traumatic neuroma, which may occur during or after surgical operations on the mandible such as sagittal split ramus osteotomy, impacted third molar tooth extraction, and dental implant surgery. Objective: This study aims to retrospectively evaluate the prevalence of bifid mandibular canal (BMC) in the Southeastern Anatolian population via Conical Beam Computed Tomography (CBCT). Material and Method: In this retrospective study, CBCT images of 615 patients, who applied to the Department of Oral and Maxillofacial Surgery in the Faculty of Dentistry at Dicle University, Turkey, for various reasons from 2015 to 2020, is evaluated and cases with bifid mandibular canals are examined. The prevalence evaluation is conducted by statistical analyses in terms of sex and laterality. Results: According to the analyses, the BMC prevalence did not constitute a significant difference in terms of the age variable (p>0.05). The incidence of unilateral BMC was higher than bilateral BMC (p<0.05; p=0.016). Additionally, the prevalence of BMC was higher in males compared to females (p<0.05; p=0.008). Conclusion: BMC, which can be detected more easily and frequently via CBCT technology, is an anatomical formation that should be taken into account during oral and maxillofacial practices

    Real-world efficacy and safety of Ledipasvir plus Sofosbuvir and Ombitasvir/Paritaprevir/Ritonavir +/- Dasabuvir combination therapies for chronic hepatitis C: A Turkish experience

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    Background/Aims: This study aimed to evaluate the real-life efficacy and tolerability of direct-acting antiviral treatments for patients with chronic hepatitis C (CHC) with/without cirrhosis in the Turkish population.Material and Methods: A total of 4,352 patients with CHC from 36 different institutions in Turkey were enrolled. They received ledipasvir (LDV) and sofosbuvir (SOF)+/- ribavirin (RBV) ombitasvir/paritaprevir/ritonavir +/- dasabuvir (PrOD)+/- RBV for 12 or 24 weeks. Sustained virologic response (SVR) rates, factors affecting SVR, safety profile, and hepatocellular cancer (HCC) occurrence were analyzed.Results: SVR12 was achieved in 92.8% of the patients (4,040/4,352) according to intention-to-treat and in 98.3% of the patients (4,040/4,108) according to per-protocol analysis. The SVR12 rates were similar between the treatment regimens (97.2%-100%) and genotypes (95.6%-100%). Patients achieving SVR showed a significant decrease in the mean serum alanine transaminase (ALT) levels (50.90 +/- 54.60 U/L to 17.00 +/- 14.50 U/L) and model for end-stage liver disease (MELD) scores (7.51 +/- 4.54 to 7.32 +/- 3.40) (p<0.05). Of the patients, 2 were diagnosed with HCC during the treatment and 14 were diagnosed with HCC 37.0 +/- 16.0 weeks post-treatment. Higher initial MELD score (odds ratio [OR]: 1.92, 95% confidence interval [CI]: 1.22-2.38; p=0.023]), higher hepatitis C virus (HCV) RNA levels (OR: 1.44, 95% CI: 1.31-2.28; p=0.038), and higher serum ALT levels (OR: 1.38, 95% CI: 1.21-1.83; p=0.042) were associated with poor SVR12. The most common adverse events were fatigue (12.6%), pruritis (7.3%), increased serum ALT (4.7%) and bilirubin (3.8%) levels, and anemia (3.1%).Conclusion: LDV/SOF or PrOD +/- RBV were effective and tolerable treatments for patients with CHC and with or without advanced liver disease before and after liver transplantation. Although HCV eradication improves the liver function, there is a risk of developing HCC.Turkish Association for the Study of The Liver (TASL

    Türk Zekâsı ve Girişimcilik

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    Bu &ccedil;alışmada kendine has &ouml;zellikleri olan T&uuml;rk d&uuml;ş&uuml;nce tarzının yaratıcı s&uuml;re&ccedil;lerdeki yansıması olan T&uuml;rk zek&acirc;sı kavramı ele alınacaktır. &Ccedil;alışmanın ilk b&ouml;l&uuml;m&uuml;nde i&ccedil;inde bulunulan toplumun zek&acirc; ve yenilik yaratmaya etkisi tartışılacaktır. İlerleyen b&ouml;l&uuml;mlerde yenilik yaratmanın temel &ouml;gesi olan girişimciliğin gelişimi T&uuml;rkler &ouml;zelinde değerlendirilecektir. &Ccedil;alışmanın son b&ouml;l&uuml;m&uuml;nde ise T&uuml;rk zek&acirc;sının &ouml;zelliklerinin, değişen yenilik yaratma s&uuml;re&ccedil;lerindeki potansiyeli irdelenecektir. &nbsp;In this study sui generis characteristic of Turkish way of thinking in creative process was investigated under the topic of Turkish Mind. This study aim to provide first, a critical review of the rudiments on mind and innovation related to society. Later section will focus on the concept of entrepreneurship and its development that evaluated according to Turks. The paper ends with a discussion of the potentials of Turkish Mind in open innovation models

    Kent kimliği bağlamında metro istasyonlarında tasarım etmenlerinin etkisi :

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    The theoretical structure of the study is composed of understanding the life cycle of metro system classified in three evolutionary phases. These process definitions respectively start with demand related to metro, continue with the acceptance of metro as the preferential alternative by inhabitants and end with the subway that embedded as an important reason that build city identity. Phases will be studied through its motives and will be analyzed through physical design considerations. The reason of the prevision is stemmed from the hypothetical approach which is stated as the influences of the design considerations of metro utilities are highly related on its life cycle and in forming local identity. The test of the hypothesis will be handled in two methods. The first will be a survey study which will include checklist to portraiture demand and course of the system in first two stages. At the preliminary stage, the topics of underground, underground use and the history of railway and urban railway network in world and Turkey are discussed to get a better and more comprehensive understanding of metro. Next method is designed to cross-examine design considerations and local identity by value judgment analysis for the last stage. In this phase, validity of the hypothesis will be audited by correspondence analysis. Value judgments depended assertion and expression of values which reached by correspondence analysis and Bertin Graphs, are accepted as the determinations that addresses the relationship between physical structure and local identity. The evaluation of the metro’s physical qualifications during its life cycle, which can be noted under several headings and the relationship between the physical aspects and those of the local characteristics, are proposed to be put forth as contributions by this thesis.Ph.D. - Doctoral Progra

    Honıng Process Wıth Taguchı Method In The Optımızatıon Of The Parameters That Affect The Qualıty Of The Surface

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    Ağır sanayi ve iş makinaları sektöründe yoğun biçimde kullanılan hidrolik silindirlerin en önemli parçalarından biri de farklı et kalınlıklarında çelik borulardır. Bunlarda oluşabilecek herhangi bir uygunsuzluk tüm sistemin zarar görmesine neden olabilecek bir durumdur. Özellikle boru iç yüzeyinde oluşan yüzey hataları ve pürüzlülük sapmaları, bu boruların içinde çalışan piston, sızdırmazlık elemanları gibi diğer önemli parçalara da zarar verebilir. Bunun önüne geçmek için, boruların tornalanmasının ardından honlama operasyonu gerçekleştirilir. Honlama ile yüzey pürüzlülük değeri oldukça iyi seviyelere getirilebilir. İşte bundan dolayı honlama prosesi sanayide sık kullanılan önemli bir proses olmuştur. Honlamada yüzey pürüzlülük değerine etki eden kontrol edilebilir faktörlerin en önemlileri; takım ilerleme hızı, takım dönüş hızı ve honlama taşı tane büyüklüğüdür. Bu faktörlerin optimize edilmesi, honlama verimini arttıracak ve yüzey pürüzlülük değerinin en iyilenmesini sağlayacaktır. Bu optimizasyonu gerçekleştirmek için Taguchi metodu kullanılmıştır. Taguchi metodu, honlama prosesi yüzey pürüzlülük karakteristiği için belirlenen faktörler ve bu faktörlerin belirlenen seviyelerini kullanarak çeşitli deney kombinasyonları ortaya koymaktadır. Belirlenen bu kombinasyonlara uygun olarak yapılan deneylerin ardından hem elle hesaplanarak hem de MINITAB paket programı aracılığıyla en iyi yüzey pürüzlülük değerini veren deney kombinasyonu belirlenebilmektedir. Belirlenen en iyi kombinasyon kullanılarak yapılan sınama deneyleri de iyileştirme olduğunu göstermiş ve faktörlerin hangi seviyelerinin yüzey pürüzlülük değerini en iyilediği tespit edilmiştir. Böylece başka honlama uygulamalarında da bu kombinasyonun kullanılabileceği ya da hangi faktör seviyesinin kullanılacağının uygun olacağı tespit edilmiştir. Sonuç olarak honlama prosesi sonrası yüzey pürüzlülük değerinin optimize edilmesine yönelik sistematik bir bilgi edinilmiştir.Heavy industrial and construction machinery sector is one of the sectors that use hydraulic cylinders in large quantities. Hydraulic cylinders are critical in working of the systems and any problem occurring with cylinders could cause damage to the entire system. Especially cylinders' inner surface defects and surface roughness cause problems in the pistons and other parts such as seals. To prevent these kinds of problems, after internal turning operation honing operation is performed. Honing provides a much smoother and free of defects surface. Its performance is dependent on tool head forward speed, rotational speed of the honing tool and honing stone grain size. In this thesis, the goal is to find the levels of these parameters that give the lowest surface roughness at the end of the honing process. Taguchi method is employed in this optimization process. Application of the Taguchi method requires a certain number of experiments using combinations at the three specified levels (high; average; low) of the three parameters. MINITAB software package is used to evaluate the outcomes of the experiments. The results of the experiments show that a certain combination of the parameters gives the lowest surface roughness in the honing process. As a result of the study, the application of the Taguchi method provided a systematic optimization tool for process improvement in manufacturing industries

    Investment and Financial Forecasting : A Data Mining Approach on Port Industry

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    ABSTRACT This thesis examines and analyzes the use of data mining techniques and simulations as a forecasting tool. Decision making process for business can be risky. Corporate decision makers have to make decisions to protect company’s benefit and lower the risk. In order to evaluate data mining approach on forecasting, a tool, called IFF, was developed for evaluating and simulating forecasts. Specifically data mining techniques’ and simulation’s ability to predict, evaluate and validate Port Industry forecasts is tested. Accuracy is calculated with data mining methods. Finally the probability of user’s and simulation model’s confidentiality is calculated. The results of the research indicate that data mining approach on forecasting and Monte Carlo method have the capability to forecast on Port industry and, if properly analyzed, can give accurate results for forecasts

    Yeraltı Mekanı ve Kavramının Toplum ve İmgelem Üzerine Etkisi

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    Yeraltı, fiziksel özelliklerinden daha çok sembolik değerleri ön plana çıkan göreli bir mekandır (1). Tarih boyunca kendi dışındaki bir gerçekliği temsil etmek ve yansıtılmak istenen hakikat için toplumsal ve kültürel olarak üretilmiştir. Teknik gelişmelere rağmen bu üretim halen devam etmekte, yeraltı günümüz toplumunda giderek artan ve farklılaşan yeni anlamlar kazanmaktadır. Yeraltına dair bu kadar benzer olumsuz görüngünün kültürlerden bağımsız olarak ortaya çıkmasının nedeni nedir? Bu sorunun yanıtı toplumların bu bilinmez mekana ait ortak bilinçaltında gizlidir. Bu bilinçaltının oluşmasında kuşaklar boyu aktarılan mitler ve mitlerden beslenen dini öğeler önemli olduğu kadar, toplumun ve bireylerin varolan düzene dışarıdan bakacakları ve eleştirecekleri, gerek duydukları halde kaçacakları, gizlenecekleri özgür mekan gereksiniminden kaynaklanmaktadır. Bu çalışmada yeraltı kavramının toplumların bilinçaltında göreli bir mekan haline gelişinin izleri ve onun sembolik dönüşümü, ezoterik ve teolojik kaynaklarla beraber edebiyat ve sinema sanatı açısından irdelenecektir.Publisher's Versio
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