Browsing Fen Fakültesi by Language "en"

Now showing items 1-20 of 540

    • 1-Dimensional Harnack Estimates 

      Duzgun, Fatma Gamze; Gianazza, Ugo; Vespri, Vincenzo (Amer Inst Mathematical Sciences-Aims, 2016)
      Let u be a non-negative super-solution to a 1-dimensional singular parabolic equation of p-Laplacian type (1 < p < 2). If u is bounded below on a time-segment {y} x (0, T] by a positive number M, then it has a power like ...

    • (2S,5R)-2-Isopropyl-5-Methylcyclohexanone Hydrazones 

      Nesterkina, Mariia; Barbalat, Dmytro; Zheltvay, Ivan; Rakipov, Ildar; Atakay, Mehmet; Salih, Bekir; Kravchenko, Iryna (2019)
      Hydrazones were obtained in 76-78% yield via condensation of (2S,5R)-2-isopropyl-5-methylcyclohexanone with 4-R-phenoxyacetic acid hydrazides in the presence of a catalytic amount of glacial acetic acid. The structure of ...

    • A Category Approach to Relation Preserving Functions in Rough Set Theory 

      Diker, Murat (Elsevier Science Inc, 2015)
      The category Rel whose objects are all pairs (U, r), where r is a relation on a universe U, and whose morphisms are relation-preserving mappings is a canonical example in category theory. One of the convenient categories ...

    • A Coanalytic Menger Group That Is Not Sigma-Compact 

      Tokgöz, Seçil (Scientific Technical Research Council Turkey-Tubitak, 2018)
      Under V = L we construct coanalytic topological subgroups of reals, demonstrating that even for definable groups of reals, selection principles may differ.

    • A Combined First Principles TDDFT and Experimental Study on the Uv-Vis Spectra Properties of M(P-Nitrophenyl Azo Resorcinol)(3) Complexes (M: Fe, Cr) 

      Tuğsuz Arifioğlu, Tuğba; Efeçınar, Melis; Şatıroğlu, Nuray (Scientific Technical Research Council Turkey-Tubitak, 2014)
      UV-Vis absorption data of p-nitrophenyl azo resorcinol (Magneson I) and its 2 Fe(III) and Cr(III) complexes were investigated both experimentally and theoretically. The geometries were optimized at BP86/TZVP level. The ...

    • A Comparative Study on Optimization Methods For The Constrained Nonlinear Programming Problems 

      Yeniay, O (Hindawi Publishing Corporation, 2005)

    • A Comparison of the Activities of Greek and Turkish Propolis Against Paenibacillus Larvae 

      Özkırım, Aslı; Celemli, Ömür Gencay; Schiesser, Aygün; Charistos, Leonidas; Hatjina, Fani (Int Bee Research Assoc, 2014)
      Propolis has a long history of use in traditional medicine dating back to at least 300 BC, and has been reported to have a broad spectrum of biological activities. Since most studies have to date focused on medical uses ...

    • A Cross-Sectional Screening By Next-Generation Sequencing Reveals Rickettsia, Coxiella, Francisella, Borrelia, Babesia, Theileria And Hemolivia Species In Ticks From Anatolia 

      Brinkmann, Annika; Hekimoğlu, Olcay; Dinçer, Ender; Hagedorn, Peter; Nitsche, Andreas; Ergünay, Koray (2019)
      Background Ticks participate as arthropod vectors in the transmission of pathogenic microorganisms to humans. Several tick-borne infections have reemerged, along with newly described agents of unexplored pathogenicity. In ...

    • A Data Science Study For Determining Food Quality: An Application To Wine 

      Ozalp, A. E.; Askerzade, I. N. (2019)
      In this paper, wine quality is investigated based on physicochemical ingredients which include fixed acidity, volatile acidity, citric acid, residual sugar, chloride, free sulfur dioxide, total sulfur dioxide, density, pH, ...

    • A Functional Trait Database For Mediterranean Basin Plants 

      Tavşanoğlu, Çağatay; Pausas, Juli G. (2018)

    • A Generalization of J - Quasipolar Rings 

      Calci, T. P.; Halicioglu, S.; Harmanci, A. (Univ Miskolc Inst Math, 2017)
      In this paper we introduce a class of quasipolar rings which is a generalization of J-quasipolar rings. Let R be a ring with identity. An element a is an element of R is called delta-quasipolar if there exists p(2) = p is ...

    • A Generalization of Projective Covers 

      Alkan, Mustafa; Nicholson, W. Keith; Ozcan, A. Cigdem (Academic Press Inc Elsevier Science, 2008)
      Let M be a left module over a ring R and I an ideal of R. We call (P, f) a projective I-cover of M if f is an epimorphism from P to M, P is projective, Ker f subset of I P, and whenever P = Ker f + X, then there exists a ...

    • A Generalization Of Rickart Modules 

      Ungor, Burcu; Halicioglu, Sait; Harmanci, Abdullah (Belgian Mathematical Soc Triomphe, 2014)
      Let R be an arbitrary ring with identity and M a right R-module with S = End(R) (M). In this paper we introduce pi-Rickart modules as a generalization of Rickart modules. pi-Rickart modules are also a dual notion of dual ...

    • A Global Review And Meta-Analysis Of Applications Of The Freshwater Fish Invasiveness Screening Kit 

      Vilizzi, Lorenzo; Copp, Gordon H.; Adamovich, Boris; Almeida, David; Chan, Joleen; Davison, Phil I.; Dembski, Samuel; Ekmekci, F. Gueler; Ferincz, Arpad; Forneck, Sandra C.; Hill, Jeffrey E.; Kim, Jeong-Eun; Koutsikos, Nicholas; Leuven, Rob S. E. W.; Luna, Sergio A.; Magalhaes, Filomena; Marr, Sean M.; Mendoza, Roberto; Mourao, Carlos F.; Neal, J. Wesley; Onikura, Norio; Perdikaris, Costas; Piria, Marina; Poulet, Nicolas; Puntila, Riikka; Range, Ines L.; Simonovic, Predrag; Ribeiro, Filipe; Tarkan, Ali Serhan; Troca, Debora F. A.; Vardakas, Leonidas; Verreycken, Hugo; Vintsek, Lizaveta; Weyl, Olaf L. F.; Yeo, Darren C. J.; Zeng, Yiwen (2019)
      The freshwater Fish Invasiveness Screening Kit (FISK) has been applied in 35 risk assessment areas in 45 countries across the six inhabited continents (11 applications using FISK v1; 25 using FISK v2). The present study ...

    • A Link Between Cytotoxicity in Cell Culture and Gastrointestinal Side Effects of Oral Anticoagulants: Bench-To-Bedside 

      Kubat, E.; Gurpinar, O. A.; Karasoy, D.; Onur, M. A. (Comenius Univ, 2018)
      OBJECTIVE: Warfarin and nonvitamin-K oral anticoagulants including dabigatran, rivaroxaban, and apixaban are commonly used in the prophylaxis and treatment of systemic embolism and deep vein thrombosis. In this study, we ...

    • A Machine-Learning-Driven Sky Model 

      Satilmis, Pinar; Bashford-Rogers, Thomas; Chalmers, Alan; Debattista, Kurt (Ieee, 2017)

    • A New Approach for the Determination of Trace Heavy Metals in Hair Dyeing Cosmetics 

      Yahya, Maha Abdulatteef (Fen Bilimleri Enstitüsü, 2021)
      Although hair does not have a vital function in humans, it is an essential body component that affects appearance and self-confidence for both men and women. Cosmetic application using chemicals to change hair color is ...

    • A New Class of Unbiased Linear Estimators in Systematic Sampling 

      Kocyigit, Eda Gizem; Cingi, Hulya (Hacettepe Univ, Fac Sci, 2017)
      Use of auxiliary variables is very common in estimating various population parameters. In this study, we suggest a class of unbiased linear estimators for estimating the population mean of the study variate y using information ...

    • A New Generalized Weighted Weibull Distribution 

      Abbas, Salman; Ozal, Gamze; Shahbaz, Saman Hanif; Shahbaz, Muhammad Qaiser (2019)
      In this article, we present a new generalization of weighted Weibull distribution using Topp Leone family of distributions. We have studied some statistical properties of the proposed distribution including quantile function, ...

    • A New Improved Estimator of Population Mean in Partial Additive Randomized Response Models 

      Özgül, Nilgün; Cingi, Hulya (Hacettepe Univ, Fac Sci, 2017)
      In this study, we have developed a new improved estimator for the population mean estimation of the sensitive study variable in Partial Additive Randomized Response Models (RRMs) using two non-sensitive auxiliary variables. ...