Browsing Fakülteler by Publisher "Scientific Technical Research Council Turkey-Tubitak"
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Almost contact metric structures induced by G(2) structures
(Scientific Technical Research Council Turkey-Tubitak, 2017)We study almost contact metric structures induced by 2-fold vector cross products on manifolds with G(2) structures. We get some results on possible classes of almost contact metric structures. Finally, we give examples. -
Chaos in product maps
(Scientific Technical Research Council Turkey-Tubitak, 2010)We discuss how chaos conditions on maps carry over to their products First we give a counterexample showing that the product of two chaotic maps (in the sense of Devaney) need not be chaotic We then remark that if two maps ... -
Composition of the essential oils of Pinus nigra Arnold from Turkey
(Scientific Technical Research Council Turkey-Tubitak, 2010)Essential oil composition of the needles of Pinus nigra Arnold collected from different localities in Turkey was investigated by GC and GC/MS. The main components in the oils were alpha-pinene, beta-pinene, beta-caryophyllene, ... -
The construction of maximum independent set of matrices via Clifford algebras
(Scientific Technical Research Council Turkey-Tubitak, 2007)In [1], [2] and [6] the maximum number of some special type n x n matrices with elements in F whose nontrivial linear combinations with real coefficients are nonsingular is studied where F is the real field R, the complex ... -
Dielectric behavior of the catalyst zeolite NaY
(Scientific Technical Research Council Turkey-Tubitak, 2007)Zeolites are crystalline hydrated aluminosilicates of alkaline and alkaline earth metals. The basic zeolite structure is an anionic frame of Si and Al T-atoms, which are tetrahedral and coordinated with oxygen atoms. The ... -
Experimental and computational studies on the absorption properties of novel formazan derivatives
(Scientific Technical Research Council Turkey-Tubitak, 2017)Eight novel 3-(4-(benzyloxy)phenyl)-5-(4-bromophenyl)-1-(4-substituted-phenyl)formazan (4a 4h) were synthesized by coupling of substituted phenylhydrazones with diazonium salts of 4-bromoaniline. The substituted phenylhydrazones, ... -
An explicit formula of the intrinsic metric on the Sierpinski gasket via code representation
(Scientific Technical Research Council Turkey-Tubitak, 2018)The computation of the distance between any two points of the Sierpinski gasket with respect to the intrinsic metric has already been investigated by several authors. However, to the best of our knowledge, in the literature ... -
Finite subquandles of sphere
(Scientific Technical Research Council Turkey-Tubitak, 2010)In this work finite subquandles of sphere are classified by using classification of subgroups of orthogonal group O(3). For any subquandle Q of sphere there is a subgroup G(Q) of O(3) associated with Q. It is shown that ... -
Graph-directed fractal interpolation functions
(Scientific Technical Research Council Turkey-Tubitak, 2017)It is known that there exists a function interpolating a given data set such that the graph of the function is the attractor of an iterated function system, which is called a fractal interpolation function. We generalize ... -
HPLC fluorescence determination of ochratoxin A utilizing a double internal standard and its application to poultry feed
(Scientific Technical Research Council Turkey-Tubitak, 2015)A validated liquid chromatography method employing a fluorescence detector for the determination of ochratoxin A (OTA) was developed with double internal standard and it was applied to ten different poultry feeds. The ... -
Influence of acid and heavy metal cation exchange treatments on methane adsorption properties of mordenite
(Scientific Technical Research Council Turkey-Tubitak, 2015)In this study, the adsorption of methane (CH4) capacities onto natural mordenite obtained from Izmir, Turkey, and its cationic forms (CuM, AgM, FeM, and HM samples) were investigated at the temperatures of 0 and 25 degrees ... -
Kaurane diterpenoids from three Sideritis species
(Scientific Technical Research Council Turkey-Tubitak, 2005)Some kaurane diterpenoids were isolated from 3 species of the genus Sideritis (Lamiaceae) growing in the Eastern Mediterranean region. Sideritis libanotica subsp. libanotica contained siderol 2 and sideridiol 3. Sideritis ... -
Linear connections on light-like manifolds
(Scientific Technical Research Council Turkey-Tubitak, 2008)It is well-known that a torsion-free linear connection on a light-like manifold (M, g) compatible with the degenerate metric g exists if and only if Rad(TM) is a Killing distribution. In case of existence, there is an ... -
Mineralogical and physicochemical properties of talc from Emirdag, Afyonkarahisar, Turkey
(Scientific Technical Research Council Turkey-Tubitak, 2013)Lens-shaped talc deposits related to Mesozoic gabbroic rocks are exposed in an area of 2 km(2), about 80 km northwest of Afyonkarahisar (western Anatolia). Different alteration zones in talc deposits were determined depending ... -
Near optimal step size and momentum in gradient descent for quadratic functions
(Scientific Technical Research Council Turkey-Tubitak, 2017)Many problems in statistical estimation, classification, and regression can be cast as optimization problems. Gradient descent, which is one of the simplest and easy to implement multivariate optimization techniques, lies ... -
(NHC)-Pd(II) complexes with hydrophilic Nitrogen ligands; catalytic properties in neat water
(Scientific Technical Research Council Turkey-Tubitak, 2013)The cleavage reactions of the dimers [(NHC)PdX2](2) with hydrophilic N-donors, L, a ff orded the mixedligand complexes of the type trans-[(NHC)LPdX2] (X = Cl or Br; NHC = 1,3-dialkylbenzimidazol-2-ylidene (BIm) or bis(imino) ... -
Novel Analogues of 2-Pyrazoline: Synthesis, Characterization, and Antimycobacterial Evaluation
(Scientific Technical Research Council Turkey-Tubitak, 2008)Fourteen new 1-[(N, N-disubstitutedthiocarbamoylthio) acetyl]-3-(2-thienyl)-5-aryl-2-pyrazoline derivatives were synthesized by reacting 1-(chloroacetyl)-3-(2-thienyl)-5-aryl-2-pyrazolines and appropriate sodium salts of ... -
On matrix rings with the SIP and the Ads
(Scientific Technical Research Council Turkey-Tubitak, 2018)In this paper, matrix rings with the summand intersection property (SIP) and the absolute direct summand (ads) property (briefly, SA) are studied. A ring R has the right SIP if the intersection of two direct summands of R ... -
On product and golden stuctures and harmonicity
(Scientific Technical Research Council Turkey-Tubitak, 2018)In this work, almost product and almost golden structures are studied. Conditions for those structures being integrable and parallel are investigated. Moreover, the harmonicity of a map between almost product or almost ... -
On the Minkowski measurability of self-similar fractals in R-d
(Scientific Technical Research Council Turkey-Tubitak, 2013)The question of Minkowski measurability of fractals is investigated for different situations by various authors, notably by M. Lapidus. In dimension one it is known that the attractor of an IFS consisting of similitudes ...