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Permanent URI for this collectionhttps://hdl.handle.net/20.500.14288/3
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Publication Metadata only Subspace-based techniques for retrieval of general 3D models(IEEE, 2009) Sankur, Bülent; Dutaǧac, Helin; Department of Computer Engineering; Yemez, Yücel; Faculty Member; Department of Computer Engineering; College of Engineering; 107907In this paper we investigate the potential of subspace techniques, such as, PCA, ICA and NMF in the case of indexing and retrieval of generic 3D models. We address the 3D shape alignment problem via continuous PCA and the exhaustive axis labeling and reflections. We find that the most propitious 3D distance transform leading to discriminative subspace features is the inverse distance transform. Our performance on the Princeton Shape Benchmark is on a par with the state-of-the-art methods. ©2009 IEEE.Publication Metadata only The effect of marital violence on infertility distress among a sample of Turkish women(Royan Inst, 2014) Şahiner, Gönül; Bakır, Bilal; Akyüz, Aygül; Seven, Memnun; Faculty Member; Faculty Member; School of Nursing; School of Nursing; 42416; 32470Background: The aim of this study was to determine the relationship between marital violence and distress level among women with a diagnosis of infertility. Materials and Methods: This cross-sectional study consisted of 139 married women diagnosed as primary infertile who applied to an in vitro fertilization (IVF) center in Turkey, between September and December 2009. A descriptive information questionnaire developed by the researcher was used for data collection. In addition, an infertility distress scale (IDS) for determining the severity effect of infertility and the scale for marital violence against women (SDVW) for determining level of marital violence against the women were used. Results: The total IDS score of the study sample was 37.76 +/- 10.53. There was no significant relationship between the age and education level of the women and the total IDS score. The total IDS score was higher in women who did not work and those being treated for infertility for more than three years. The total SDVW score of the study sample was 67.0 +/- 8.26. The total SDVW score was higher in women who had been trying to have a child for more than six years and had received infertility treatment for longer than three years. The employment status of the women and physical, emotional, and sexual violence scores had a statistically significant relationship with the IDS scores. The emotional violence score was found to have the highest significance among the variables affecting total IDS score. Conclusion: Marital violence is a factor increasing the distress of infertile women. Healthcare staff serving infertile couples should consider the possibility of domestic violence against women as a factor affecting the psychological infertility distress level.Publication Metadata only Robust speech recognition using adaptively denoised wavelet coefficients(IEEE, 2004) Department of Electrical and Electronics Engineering; Department of Electrical and Electronics Engineering; N/A; Tekalp, Ahmet Murat; Erzin, Engin; Akyol, Emrah; Faculty Member; Faculty Member; Master Student; Department of Electrical and Electronics Engineering; College of Engineering; College of Engineering; Graduate School of Sciences and Engineering; 26207; 34503; N/AThe existence of additive noise affects the performance of speech recognition in real environments. We propose a new set of feature vectors for robust speech recognition using denoised wavelet coefficients. The use of wavelet coefficients in speech processing is motivated by the ability of the wavelet transform to capture both time and frequency information and the non-stationary behaviour of speech signals. We use one set of noisy data, such as data with car noise, and we use hard thresholding in the best basis for denoising. We use isolated digits as our database in our HMM based speech recognition system. A performance comparison of hard thresholding denoised wavelet coefficients and MFCC feature vectors is presented.Publication Metadata only Light engine and optics for HELIUM3D auto-stereoscopic laser scanning display(IEEE, 2011) Willman, Eero; Baghsiahi, Hadi; Day, Sally E.; Selviah, David R.; Fernandez, F. Anibal; N/A; Department of Electrical and Electronics Engineering; N/A; Department of Electrical and Electronics Engineering; Department of Electrical and Electronics Engineering; Akşit, Kaan; Ölçer, Selim; Erden, Erdem; Chellappan, Kishore Velichappattu; Ürey, Hakan; PhD Student; Other; Master Student; Researcher; Faculty Member; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; College of Engineering; Graduate School of Sciences and Engineering; College of Engineering; College of Engineering; N/A; N/A; N/A; N/A; 8579This paper presents a laser-based auto-stereoscopic 3D display technique and a prototype utilizing a dual projector light engine. The solution described is able to form dynamic exit pupils under the control of a multi-user head-tracker. A prototype completed recently is able to provide a glasses-free solution for a single user at a fixed position. At the end of the prototyping phase it is expected to enable a multiple user interface with an integration of the pupil tracker and the spatial light modulator.Publication Metadata only Sex, wealth, and courage: kinds of goods and the power of appearance in plato's protagoras(Philosophy Documentation Center, 2018) Department of Philosophy; Storey, Damien; Faculty Member; Department of Philosophy; College of Social Sciences and Humanities; 293535I offer a reading of the two conceptions of the good found in Plato’s Protagoras: the popular conception—‘the many’s’ conception—and Socrates’ conception. I pay particular attention to the three kinds of goods Socrates introduces: (a) bodily pleasures like food, drink, and sex; (b) instrumental goods like wealth, health, or power; and (c) virtuous actions like courageously going to war. My reading revises existing views about these goods in two ways. First, I argue that the many are only ‘hedonists’ in a very attenuated sense. They do not value goods of kind (b) simply as means to pleasures of kind (a); rather, they have fundamentally different attitudes to (a) and (b). Second, the hedonism that Socrates’ defends includes a distinction between kinds of pleasures: (a) bodily pleasures and (c) the pleasures of virtuous actions. This distinction between kinds of pleasures—some that do and some that do not exert the ‘power of appearance’—allows Socrates to address one of the central beliefs in the popular conception of akrasia, namely that it involves a special kind of unruly desire: non-rational appetites for pleasures like food, drink, or sex. Socrates replaces the motivational push of non-rational appetites with the epistemic pull of the appearance of immediate pleasures like food, drink, and sex.Publication Metadata only Value creation in service delivery: relating market segmentation, incentives, and operational performance(Institute for Operations Research and the Management Sciences, 2004) Güneş, Evrim D.; Department of Business Administration; Karaesmen, Zeynep Akşin; Faculty Member; Department of Business Administration; College of Administrative Sciences and Economics; 4534This paper studies service-delivery design in settings where firms engage in value-creation activities that have the objective of generating additional revenue from customer interactions. The paper provides a general modelling framework to analyze the ties between market segmentation decisions, incentives, and process performance in such service-delivery systems. The firm is modelled as a single-server queue, in a principal-agent framework. Customers have different value-generation potentials whose realizations are observed by the server but not by the manager of the firm. The manager determines a market segmentation scheme given an overall customer value-generation profile, which divides customers into two groups (high and low), and also determines a service level for each segment. The server decides which of the two available service levels (high and low) to provide for each customer, given a compensation scheme offered by the manager. The optimal market segmentation decision, optimal service-level choice, and a set of optimal linear incentive contracts that enable their implementation are characterized. The robustness of these strategies is explored with respect to model parameters and assumptions. It is shown that a market segmentation scheme that combines revenue generation concerns with their process implications is essential for success. Characteristics of appropriate incentive schemes are identified.Publication Metadata only Linguistic strategies serving evaluative functions: a comparison between Japanese and Turkish narratives(Lawrence Erlbaum Associates. Inc., 2003) Nakamura, Keiko; Department of Psychology; Küntay, Aylin C.; Faculty Member; Department of Psychology; College of Social Sciences and Humanities; 178879N/APublication Metadata only Migration and transformation: multi-level analysis of migrant transnationalism(Springer Netherlands, 2012) Sert, Deniz; Pitkänen, Pirkko; Department of International Relations; İçduygu, Ahmet; Faculty Member; Department of International Relations; College of Administrative Sciences and Economics; 207882People’s transnational ties and activities are acquiring ever greater importance and topicality in today’s world. The focus of this book lies in the complex and multi-level processes of migrant transnationalism in four transnational spaces: India-UK, Morocco-France and Turkey-Germany and Estonia-Finland. The main question is, how people’s activities across national borders emerge, function, and change, and how are they related to the processes of governance in increasingly complex and interconnected world? The book is based on the findings of a three-year research project TRANS-NET which brough together internationally acknowledged experts from Europe, Asia and Africa. As no single discipline could investigate all the components of the topic in question, the project adopted a multi-disciplinary approach: among the contributors, there are sociologists, policy analysts, political scientists, social and cultural anthropologists, educational scientists, and economists. The chapters show that people’s transnational linkages and migration across national boundaries entail manifold political, economic, social, cultural and educational implications. Although political-social-economic-educational transformations fostered by migrant transnationalism constitute the main topic of the book, the starting assumption is that the large-scale institutional and actor-centred patterns of transformation come about through a constellation of parallel processes. Springer Science+Business Media B.V. 2012.Publication Metadata only How an ipo helps in m&a(Wiley, 2010) Sevilir, Merih; Shivdasani, Anil; Department of Business Administration; Çelikyurt, Uğur; Faculty Member; Department of Business Administration; College of Administrative Sciences and Economics; 47082An initial public offering (IPO) can often provide a powerful stimulus to private companies seeking to pursue an acquisition- driven growth strategy. Based on a comprehensive analysis of U.S. IPOs, the authors show that newly public companies are prolific acquirers. Over 30% of companies conducting an IPO make at least one acquisition in their IPO year, and the typical IPO firm makes about four acquisitions during its first five years as a public company. IPOs facilitate MandA not only by providing infusions of capital but also by creating ongoing access to equity and debt markets for cash-financed deals. In addition, IPOs create an acquisition currency that can prove valuable in stock-financed deals when the shares are attractively priced. The authors also argue that IPOs improve the ability of companies to conduct MandA by resolving some of the valuation uncertainty facing privately held companies.Publication Metadata only Acculturation and family relations(Türk Psikologlar Derneği, 2014) Department of Psychology; Kağıtçıbaşı, Çiğdem; Faculty Member; Department of Psychology; College of Social Sciences and Humanities; N/AThis article is an overview of some of the main issues seen in the context of immigration. As an epilogue, it relates to the other articles in this Special Issue, as well. In particular, the European scene is examined on the basis of research conducted over the last decades. There is also an emphasis on family relations and acculturation as well as their interface. Immigration and acculturation over half a century are introduced through a historical perspective noting that multiphasic and multidisciplinary approaches are needed to understand the myriad factors involved. In particular, cultural and developmental viewpoints are promising. Acculturation research has focused on the acculturating migrant, without due attention to the context of acculturation. In particular, prejudice and discrimination are the greatest challenges. This approach leaves something to be desired, since immigration is a very complex human phenomenon involving issues ranging from micro to macro levels of analysis. While the former concerns individual factors, including the family, the latter includes historic, sociological, economic, and legal aspects and applications. Focusing on the acculturating (or non-acculturating) individual or family without a contextual approach can lead to dispositional attributions, even ‘blaming the victim’, that is, social psychological processes not conducive to understanding and promoting the well-being of the immigrant or the host society. In this context, there is a further need for research to address policies and to suggest solutions for improvement. In particular, concerted efforts that prove to be beneficial for the family, women and children are badly needed. Turkish psychologists and social scientists would do well to attend to these very important topics of study. / Bu makale göç olgusunun çeşitli yönlerine eğilen genel bir çalışmadır ve bu özel sayı için bir sonsöz niteliği taşımaktadır. Özellikle son birkaç on yıldaki araştırmalardan yola çıkarak, bu özel sayıdaki makaleler de dahil olmak üzere, Avrupa’daki durumu ele almaktadır. Aynı zamanda kültürleşme ve aile konularını ve bunların etkileşimini inceler. Yarım yüzyıllık bir göç olgusu tarihsel bir perspektifle ele alınıyor. Bu çok faktörlü karmaşık olayı iyi anlayabilmek için çok katmanlı ve çok disiplinli bir yaklaşımın gerekli olduğu da not ediliyor. Özellikle kültürel ve gelişimsel yaklaşımların yararlı olacağı öne sürülüyor. Kültürleşme çalışmaları genellikle kültürleşme ortamını yeterince incelemeden kültürleşen göçmene vurgu yapıyor. Oysa ki baskın toplumdaki önyargı ve ayrımcılık önemli sorunlardır. Bu yaklaşım yetersiz kalıyor çünkü karmaşık göç süreci, mikro yaklaşımlardan, makro yaklaşımları gerekli kılan karmaşık bir olgudur. Mikro düzeyde insan ve aileye yönelik araştırmalar söz konusuyken, makro düzeyde sosyolojik, ekonomik, hukuksal hususların ve uygulamaların incelenmesi önemlidir. Bağlamı dikkate almadan, kültürleşen (ya da kültürleşmeyen) birey ya da aileye vurgu yapmak, içsel atıflara, hatta “mazlumu suçlamaya” kadar gidebilir. Bunlar ise, olayı anlamaya ve gerek göçmenin, gerek baskın toplumun yararına olmayan sosyal psikolojik yaklaşımlardır. Bu noktada araştırmaların göçmen politikalarına yönelik ve çözüm önerici olması çok yararlıdır. Özellikle, göçmen kadın, aile ve çocukların esenliğine katkıda bulunabilecek çabalara ihtiyaç vardır. Türk psikologlar ve sosyal bilimcilerin bu çok önemli araştırma konularına daha fazla eğilmesi çok yararlı olacaktır.