Browsing 1. Fen Fakültesi / Faculty of Science by Title
Now showing items 16341653 of 1659

Vacuum energy as the origin of the gravitational constant
(Springer, 200911)We develop a geometrodynamical approach to the cosmological constant problem (CCP) by invoking a geometry induced by the energymomentum tensor of vacuum, matter and radiation. The construction, which utilizes the dual ... 
Vapor phase solvatochromic responses of polydiacetylene embedded matrix polymers
(Royal Society of Chemistry, 2017)The solvatochromic response of polydiacetylene (PDA) in the vapor phase is enabled upon incorporation with matrix polymers such as polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), polyacrylic acid (PAA), and ... 
Variations on a theme of qoscillator
(IOP Publishing, 20150701)We present several ideas in the direction of physical interpretation of q and foscillators as nonlinear oscillators. First we show that an arbitrary onedimensional integrable system in actionangle variables can be ... 
Vector shock soliton and the Hirota bilinear method
(Elsevier, 200510)The Hirota bilinear method is applied to find an exact shock soliton solution of the system reactiondiffusion equations for ncomponent vector order parameter, with the reaction part in form of the third order polynomial, ... 
Vertexdecomposable graphs, codismantlability, cohenmacaulayness, and castelnuovomumford regularity
(Electronic Journal of Combinatorics, 201401)We call a vertex x of a graph G = (V, E) a codominated vertex if NG[y] ⊆ NG[x] for some vertex y ∈ V \{x}, and a graph G is called codismantlable if either it is an edgeless graph or it contains a codominated vertex x such ... 
Violation of the holographic principle in the loop quantum gravity
(Institute of Physics Publishing, 201602)In this paper, we analyze the holographic principle using loop quantum gravity (LQG). This will be done by using polymeric quantization for analysing Yurtsever's holographic bound on the entropy, which is obtained from ... 
Visual detection of Al3+ ions using conjugated copolymerATP supramolecular complex
(Elsevier, 201603)A colorimetric Al3+ sensor based on fluorescence recovery of a conjugated copolymerATP complex is proposed. An optimized ratio of two polythiophene (PT) monomers is utilized to synthesize copolymer (CP) that yielded ... 
VOC sensors based on a metal oxide nanofibrous membrane/QCM system prepared by electrospinning
(Royal Society of Chemistry, 201408)We report a simple synthetic route to fabricate crystalline ZnO and CeO2/ZnO nanofibrous mats and their sensing characteristics against volatile organic compounds (VOCs) such as benzene, propanol, ethanol, and dichloromethane. ... 
Vortex images and qelementary functions
(IOP Publishing, 200804)In the present paper, the problem of vortex images in the annular domain between two coaxial cylinders is solved by the qelementary functions. We show that all images are determined completely as poles of the qlogarithmic ... 
Vortex images, qcalculus and entangled coherent states
(IOP Publishing, 2012)The two circles theorem for hydrodynamic flow in annular domain bounded by two concentric circles is derived. Complex potential and velocity of the flow are represented as qperiodic functions and rewritten in terms of the ... 
Watersoluble antioxidant potential of melon lines grown in Turkey
(Taylor & Francis, 201201)The antioxidant potential of 42 melon (Cucumis melo) lines including six cultivars grown in Turkey was assessed by measuring total watersoluble antioxidant capacity, phenolic and vitamin C contents. The lines showed ... 
Watersoluble antioxidant potential of Turkish pepper cultivars
(American Society for Horticultural Science, 200806)In this work, 29 pepper cultivars that represent the diversity of types and varieties grown in Turkey were analyzed for watersoluble antioxidant capacity and phenolic and vitamin C contents. In addition, 14 nonTurkish ... 
A way to get rid of cosmological constant and zeropoint energy problems of quantum fields through metric reversal symmetry
(IOP Publishing, 200806)In this paper, a framework is introduced to remove the huge discrepancy between the empirical value of the cosmological constant and the contribution to the cosmological constant predicted from the vacuum energy of quantum ... 
Weakly distributive modules. Applications to supplement submodules
(Indian Academy of Sciences, 201011)In this paper, we define and study weakly distributive modules as a proper generalization of distributive modules. We prove that, weakly distributive supplemented modules are amply supplemented. In a weakly distributive ... 
Weighted bloch, lipschitz, zygmund, bers, and growth spaces of the ball: Bergman projections and characterizations
(Elsevier, 201102)We determine precise conditions for the boundedness of Bergman projections from Lebesgue classes onto the spaces in the title, which are members of the same oneparameter family of spaces. The projections provide integral ... 
Well posedness conditions for Bimodal Piecewise Affine Systems
(Elsevier, 20150701)This paper considers wellposedness (the existence and uniqueness of the solutions) of Bimodal Piecewise Affine Systems in ℝn. It is assumed that both modes are observable, but only one of the modes is in observable canonical ... 
Wellposedness for nonlinear Schrödinger equations with boundary forces in low dimensions by Strichartz estimates
(Elsevier, 201504)In this paper, we study the wellposedness of solutions for nonlinear Schrödinger equations on one and two dimensional domains with boundary where the boundary is disturbed by an external inhomogeneous type of Dirichlet ... 
When δsemiperfect rings are semiperfect
(TÜBİTAK, 201009)Zhou defined δ semiperfect rings as a proper generalization of semiperfect rings. The purpose of this paper is to discuss relative notions of supplemented modules and to show that the semiperfect rings are precisely the ... 
White LED light production using dibromoperylene derivatives in down conversion of energy
(Canadian Science Publishing, 2018)Perylene derivatives of N,N′bis(2,6diisopropylphenyl)1,6(7)dibromoperylene3,4,9,10tetracarboxylic diimide (DBrPDI) and 1,7dibromo perylene3,4,9,10tetracarboxylic acid butyl ester (DBrPTE) were synthesized, and ... 
Wigner crystallization at graphene edges
(American Physical Society, 20160112)Using manybody configuration interaction techniques, we show that Wigner crystallization occurs at the zigzag edges of graphene at surprisingly high electronic densities up to 0.8nm1. In contrast with onedimensional ...