Now showing items 122-141 of 182

    • On a conjecture of Ilmonen, Haukkanen and Merikoski concerning the smallest eigenvalues of certain GCD related matrices 

      Altinişik, E.; Keskin, A.; Yildiz, M.; Demirbüken, M. (Elsevier Inc., 2016)
      Let Kn be the set of all n×n lower triangular (0,1)-matrices with each diagonal element equal to 1, Ln={YYT:Y ∈ Kn} and let cn be the minimum of the smallest eigenvalue of YYT as Y goes through Kn. The Ilmonen-Haukkanen-Merikoski ...
    • On determining cluster size of randomly deployed heterogeneous WSNs 

      Sevgi, C.; Koçyiğit, A. (IEEE, 2008)
      Clustering is an efficient method to solve scalability problems and energy consumption challenges. For this reason it is widely exploited in Wireless Sensor Network (WSN) applications. It is very critical to determine ...
    • On Lempel-Ziv complexity of sequences 

      Doǧanaksoy, A.; Göloǧlu, Faruk (Springer, Berlin, Heidelberg, 2006)
      We derive recurrences for counting the number a(n, r) of sequences of length n with Lempel-Ziv complexity r, which has important applications, for instance testing randomness of binary sequences. We also give algorithms ...
    • On non-cooperative genomic privacy 

      Humbert, M.; Ayday, Erman; Hubaux J.-P.; Telenti, A. (Springer, Berlin, Heidelberg, 2015)
      Over the last few years, the vast progress in genome sequencing has highly increased the availability of genomic data. Today, individuals can obtain their digital genomic sequences at reasonable prices from many online ...
    • On the analysis of expected distance between sensor nodes and the base station in randomly deployed WSNs 

      Sevgi, C.; Ali, S.A. (Springer Verlag, 2014)
      In this study, we focus on the analytical derivation of the expected distance between all sensor nodes and the base station (i.e., E[dtoBS]) in a randomly deployed WSN. Although similar derivations appear in the related ...
    • On the statistical Analysis of Feigenbaum Constants 

      Sezgin, F.; Sezgin, T. M. (Elsevier, 2006-11)
      We present statistical analysis of blocks in the binary expansions of Feigenbaum constants a and d for the logistic map. The analysis is carried out on both 1016 and 3400 bit expansions. A w2 test is applied for lumping ...
    • Operational risk and stock market returns: evidence from Turkey 

      Solakoglu, M. N.; Kose, K. A. (John Wiley and Sons, 2011)
      Following several high-severity, low-frequency events in the financial sector, operational risk has gained importance both for regulators and managers of financial sector firms during the last decade. The banking sector ...
    • Opportunities and obligations in dealing with the disabled staff and customers in hospitality industry 

      Collins, Ayşe Baş (Nova Science Publishers, Inc., 2007)
      Travel and Tourism is a high-growth industry, which is forecast to increase its total economic activity by 4.2% per annum worldwide in real terms over the next ten years (World Travel and Tourism Council, 2006). Travel and ...
    • An optimal network dimensioning and initial energy assignment minimizing the monetary cost of a heterogeneous WSN 

      Sevgi, Cüneyt; Kocyigit, A. (IEEE, 2009)
      In this paper, a novel method is proposed to dimension a randomly deployed heterogeneous Wireless Sensor Network (WSN) of minimum monetary cost satisfying minimum coverage and minimum lifetime requirements. We consider ...
    • Option contract 

      Solakoğlu, M. Nihat (Chapman & Hall/CRC, 2009)
    • Ordinal covering using block designs 

      Atmaca, Abdullah; Oruc, A.Y. (IEEE, 2010)
      A frequently encountered problem in peer review systems is to facilitate pairwise comparisons of a given set of documents by as few experts as possible. In [7], it was shown that, if each expert is assigned to review k ...
    • Ordinal evaluation and assignment problems 

      Atmaca, Abdullah; Oruç, A. Yavuz (IEEE, 2010)
      In many assignment problems, a set of documents such as research proposals, promotion dossiers, resumes of job applicants is assigned to a set of experts for ordinal evaluation, ranking, and classification. A desirable ...
    • Organizational culture's role in the relationship between power bases and job stress 

      Erkutlu, H.; Chafra, Jamel; Bumin, B. (Hacettepe Üniversitesi, 2011)
      The purpose of this research is to examine the moderating role of organizational culture in the relationship between leader’s power bases and subordinate’s job stress. Totally 622 lecturers and their superiors (deans) from ...
    • Örgütlerde yaratıcı düşünmeyi geliştirme 

      Bumin, B.; Erkutlu, Hakan (Hacettepe Üniversitesi İktisadi ve İdari Bilimler Fakültesi Dekanlığı, 2004)
      Creative problem solving and innovation are vital concepts for companies to have competitive advantage. In this study, “developing and improving a creative organizational culture” are examined in detail. In addition, ...
    • Pay-back; can students evaluate their instructors: dilemmas and problems. 

      Collins, A. B. (John Wiley & Sons, Inc., 2001)
    • Performance analysis of turbo codes over Nakagami-m fading channels with impulsive noise 

      Ali, Syed Amjad; İnce, E. A. (IEEE, 2007)
      The statistical characteristics of impulsive noise differ greatly from those of Gaussian noise. Hence, the performance of conventional decoders, optimized for AWGN channels is not promising in non-Gaussian environments. ...
    • Performance analysis of turbo codes over Rician fading channels with impulsive noise 

      Ali, Syed Amjad; Ince, E.A. (IEEE, 2007)
      The statistical characteristics of impulsive noise differ greatly from those of Gaussian noise. Hence, the performance of conventional decoders, optimized for additive white Gaussian noise (AWGN) channels is not promising ...
    • Plasmonic nanoparticle based nanobiosensors and nanophotodetectors 

      Cinel, Neval A.; Bütün, S.; Özbay, Ekmel (SPIE, 2013)
      Plasmonics mainly deals with light-matter interactions in metallic nanostructures. It has gathered interest since its discovery due to the benefits it provides when compared with photonics and electronics. It owes its ...
    • Preservice teachers' Facebook usage and their perspectives about Facebook as a professional development tool 

      Köşkeroğlu-Büyükimdat, M.; Albayrak, Duygu; Uğur-Erdoğmuş, F.; Yıldırım, S.; Eryol, G.; Ataman, Y. E. (Ahi Evran Üniversitesi Kırşehir Eğitim Fakültesi, 2011)
      In this study, an explanatory mixed method design was employed to evaluate preservice information technology teachers’ Facebook usage and their perspectives about Facebook as a professional development tool. In quantitative ...
    • Preventing unauthorized data flows 

      Uzun, Emre; Parlato, G.; Atluri, V.; Ferrara, A. L.; Vaidya, J.; Sural, S.; Lorenzi, D. (Springer, Cham, 2017)
      Trojan Horse attacks can lead to unauthorized data flows and can cause either a confidentiality violation or an integrity violation. Existing solutions to address this problem employ analysis techniques that keep track of ...