Now showing items 1-16 of 16

    • An adaptive speckle suppression filter for medical ultrasound imaging 

      Karaman, M.; Kutay, M. A.; Bozdagi, G. (Institute of Electrical and Electronics Engineers, 1995-06)
      An adaptive smoothing technique for speckle suppression in medical B-scan ultrasonic imaging is presented. The technique is based on filtering with appropriately shaped and sized local kernels. For each image pixel, a ...
    • Analysis of the generation of amplitude-squeezed light with Gaussian-beam degenerate optical parametric amplifiers 

      Köprülü, K. G.; Aytür, O. (OSA Publishing, 2001-06)
      We investigate the generation of amplitude-squeezed states with degenerate optical parametric amplifiers that are pumped by focused Gaussian beams. We present a model that facilitates the calculation of the squeezing level ...
    • Automatic performance evaluation of Web search engines 

      Can, F.; Nuray, R.; Sevdik, A. B. (Elsevier, 2004)
      Measuring the information retrieval effectiveness of World Wide Web search engines is costly because of human relevance judgments involved. However, both for business enterprises and people it is important to know the most ...
    • Bandwidth selection for kernel density estimation using fourier domain constraints 

      Suhre, A.; Arikan, O.; Cetin, A. E. (Institution of Engineering and Technology, 2016)
      Kernel density estimation (KDE) is widely-used for non-parametric estimation of an underlying density from data. The performance of KDE is mainly dependent on the bandwidth parameter of the kernel. This study presents an ...
    • ConceptMap: mining noisy web data for concept learning 

      Golge, E.; Duygulu, P. (Springer Verlag, 2014)
      We attack the problem of learning concepts automatically from noisy Web image search results. The idea is based on discovering common characteristics shared among subsets of images by posing a method that is able to organise ...
    • Determinants of choosing withdrawal over modern contraceptive methods in Turkey 

      Cindoglu, D.; Sirkeci, I.; Sirkeci, R. F. (Taylor & Francis, 2008)
      Objectives The determinants of the use of withdrawal in Turkey are examined using a multinomial logistic model. Methods Data were drawn from a nation-wide population-based cross-sectional study, the Turkish Demographic ...
    • Differences in the accumulation and distribution profile of heavy metals and metalloid between male and female crayfish (Astacus leptodactylus) 

      Tunca, E.; Ucuncu, E.; Ozkan, A.D.; Ulger, Z.E.; Cansizoǧlu, A.E.; Tekinay, T. (2013)
      Concentrations of selected heavy metals and a metalloid were measured by ICP-MS in crayfish (Astacus leptodactylus) collected from Lake Hirfanli, Turkey. Aluminum (Al), chromium (52Cr, 53Cr), copper ( 63Cu, 65Cu), manganese ...
    • Effects of daylight savings time changes on stock market volatility 

      Berument, Hakan; Dogan, N.; Onar, Bahar (Sage Publications, Inc., 2010)
      The presence of daylight savings time effects on stock returns and on stock volatility was investigated using an EGARCH specification to model the conditional variance. The evidence gathered from the major United States ...
    • Information retrieval on Turkish texts 

      Can, F.; Kocberber, S.; Balcik, E.; Kaynak, C.; Ocalan, H. C.; Vursavas, O. M. (John Wiley & Sons, Inc., 2008-02)
      In this study, we investigate information retrieval (IR) on Turkish texts using a large-scale test collection that contains 408,305 documents and 72 ad hoc queries. We examine the effects of several stemming options and ...
    • On the Hajek projection for truncated and censored data 

      Gürler, Ü.; Wang, J.-L. (Scientific Publishers, 1993)
      Large sample properties of the product-limit estimators for truncated or censored data are usually achieved via the empirical cumulative hazard function estimators. Hajek projection of the empirical cumulative hazard ...
    • Optimal filtering in fractional Fourier domains 

      Kutay, M.Alper, Ozaktas Haldun, M.; Onural Levent, Arikan Orhan (1995)
      The ordinary Fourier transform is suited best for analysis and processing of time-invariant signals and systems. When we are dealing with time-varying signals and systems, filtering in fractional Fourier domains might allow ...
    • Ordering translation templates by assigning confidence factors 

      Öz, Z.; Cicekli I. (Springer Verlag, 1998)
      TTL (Translation Template Learner) algorithm learns lexical level correspondences between two translation examples by using analogical reasoning. The sentences used as translation examples have similar and different parts ...
    • Pre-service elementary teachers' understandings of graphs 

      Alacaci, C.; Lewis, S.; O'Brien G. E.; Jiang, Z. (Eurasia Publishing House, 2011)
      Choosing graphs to display quantitative information is a component of graph sense. An important aspect of pre-service elementary teachers' content knowledge; ability to choose appropriate graphs in applied contexts is ...
    • Snippet based trajectory statistics histograms for assistive technologies 

      Iscen, A.; Wang Y.; Duygulu, P.; Hauptmann, A. (Springer, 2015)
      Due to increasing hospital costs and traveling time, more and more patients decide to use medical devices at home without traveling to the hospital. However, these devices are not always very straight-forward for usage, ...
    • Soccer and stock market risk: empirical evidence from the Istanbul stock exchange 

      Berument, M. H.; Ceylan, N. B. (Sage Publications, Inc., 2013)
      There is an emerging but important literature on the effects of sport events such as soccer on stock market returns. After a soccer team's win, agents discount future events more favorably and increase risk tolerance. ...
    • Synthetic TEC mapping with ordinary and universal kriging 

      Sayin I.; Arikan F.; Arikan, O. (2007)
      Spatiotemporal variations in the ionosphere affects the HF and satellite communications and navigation systems. Total Electron Content (TEC) is an important parameter since it can be used to analyze the spatial and temporal ...