bluuebunny/crossref_metadata_2025_split huggingface dataset:
Image restoration through regularization based on error energy minimization
Authors: Pan Min‐Cheng 
Published: November 2010

AbstractImage restoration has been an important field of image processing for decades. Various methods of restoration have been studied. Meanwhile, regularization presents a very general methodology for image restoration. However, more regularization will remove more noise but will also lose more image detail, and vice versa. In this article, a novel image restoration algorithm is presented, which is derived from regularization by minimizing error energy of noise and ring artifact. Thus, this proposed algorithm is not only immune to noise but also ringing artifact, where a designed high‐pass filter is used in the algorithm proposed here such as the difference of a delta function and a blurring function or an edge operator like a Laplacian operator. This proposed algorithm can achieve high‐resolution images by being implemented with a 1D noiseless signal to reveal its ability of generating high frequencies beyond the diffraction limit and with a 2D computer‐generated noisy image to show the ability of being immune to noise as well as with a 94‐GHz millimeter‐wave image to validate its reliability. © 2010 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 20, 308–315, 2010
Long‐term feeding effects of stevioside sweetener on some toxicological parameters of growing male rats
Authors: Awney Hala A. , Massoud Mona I. , El‐Maghrabi Samia 
Published: November 2010

ABSTRACTSeveral attempts to decrease sugar demand by introducing stevioside as a sugar substitute in children's food products have been made, but safety issues were concerned. This exploratory study investigated the effects of stevioside low dose (SL), high dose (SH) and low dose with inulin (SL + I) for 12 weeks on the body weight, organ relative weight, hematological and biochemical parameters and enzyme activities of young male rats. The SL dose used in this study was 15 mg kg−1 per day and the SH dose was 100‐fold the low dose. Enormous similarities in most parameters were observed with no significant differences between SL, SL + I and control except in the lipid profile. Total lipid reduction in SL and SL + I and significant high‐density lipoprotein increase in SL + I were observed, which may be considered as clinically beneficial. Significant decreases in serum tartrate‐resistant acid phosphatase activity were also observed in all treatments. Treatment with SH caused significant changes in all investigated toxicological parameters. The results indicated that, although the SL dose was higher than the stevioside temporary accepted daily intake (5.0 mg kg−1 body weight), no toxicological effects were observed in SL or SL + I on body weight, organ relative weight, hematological and biochemical parameters or enzyme activities investigated in this study, whereas stevioside high dose (1500 mg kg−1 per day) may be considered as a toxic dose for the same biological parameters in young male rats. However, the effects of SL, SH and SL + I on serum tartrate‐resistant acid phosphatase activity need more investigation. Copyright © 2010 John Wiley & Sons, Ltd.
In vivo genotoxicity assessment of nerolidol
Authors: Pículo Fernanda , Guiraldeli Macedo Ceci , de Andrade Sérgio Faloni , Luis Maistro Edson 
Published: November 2010

ABSTRACTNerolidol is a sesquiterpenoid component of essential oil used as a flavor and aroma enhancer. It has also been studied as a topical skin penetration enhancer, and has inhibitory activities against S. aureus and E. coli, among other activities. The objective of this study was to evaluate the ability of a single nerolidol treatment to induce DNA damage in peripheral blood and liver cells of mice and micronuclei in polychromatic erythrocytes of bone marrow cells of the same animals. In the dose range‐finding assays, the maximum tolerated dose was higher than 2000 mg kg−1. The doses used in the experiments were 250, 500 and 2000 mg kg−1, administered by gavage in a single dose. Peripheral blood cells were collected 4 and 24 h after the treatments and liver cells 24 h after. At least 100 nucleoids per cell type/animal were analyzed to determine the DNA damage scores and 2000 PCEs per animal for micronuclei in PCEs. The positive control was N‐nitroso‐N‐ethylurea 50 mg kg−1. Cytotoxicity was assessed by scoring 200 consecutive total polychromatic (PCE) and normochromatic (NCE) erythrocytes (PCE:NCE ratio). The results showed that nerolidol induced weak levels of dose‐related DNA damage in both types of cells analyzed, and enhanced the average number of micronucleated cells in the two high doses tested. The PCE:NCE ratio showed no cytotoxicity for the three doses of the compound. The data obtained support the view that nerolidol induces clastogenicity and very weak genotoxicity in the mouse cells tested. Copyright © 2010 John Wiley & Sons, Ltd.
Alterations in biomarkers of endothelial function following on‐pump coronary artery revascularization
Authors: Panagiotopoulos Ioannis , Palatianos George , Michalopoulos Argyris , Chatzigeorgiou Antonios , Prapas Sotirios , Kamper Elli F. 
Published: November 2010

AbstractBackground: Cardiopulmonary bypass (CPB) has been associated with activation and injury of endothelial cells, probably responsible for the systemic inflammatory response syndrome (SIRS) taking place in these patients. Methods: We measured plasma concentrations of soluble P‐selectin (sP‐s), E‐selectin (sE‐s), tetranectin (TN), vonWillebrand factor (vWF) levels, and angiotensin‐converting enzyme (ACE) activity in 31 adult patients undergoing elective coronary artery bypass grafting, just before and up to three days after surgery, and in 25 healthy volunteers. Results: Patients showed higher plasma sP‐s and sE‐s and ACE concentrations, just before surgery, but significantly lower TN levels, compared with controls. During the first three postoperative days (PD), the concentration of each of the molecules followed a different and independent pattern, although in the third PD, the levels of sP‐s, sE‐s and ACE were higher and those of vWF and TN lower, compared with the preoperative ones. However, patients had higher sP‐s (P=0.06), sE‐s (P=0.07), and vWF (P=0.005), but lower TN concentrations (P=0.02) on the third PD compared with controls. Conclusions: CPB is characterised by pronounced changes in plasma sP‐s, sE‐s, TN, vWF levels, and ACE activity, which are associated with significant alteration in the intra‐ and early postoperative endothelial function observed in open heart surgery. J. Clin. Lab. Anal. 24:389–398, 2010. © 2010 Wiley‐Liss, Inc.
Gene diagnosis of Oculopharyngeal muscular dystrophy in a Chinese family by a genescan method
Authors: You Pan , Ma Qilin , Tao Tao 
Published: November 2010

AbstractThis study aims to perform gene diagnosis for Chinese family patients with Oculopharyngeal muscular dystrophy (OPMD). Genomic DNAs were extracted from the pedigrees' members. Gene diagnosis was performed for these pedigrees' members by approaches, such as DNA sequencing and GeneScan. Sequence analysis and PABPN1 genotyping showed that the mutated allele in affected members of this familyhas nine trinucleotide repeats of GCG (GCG)9, whereas the normal allele contains six trinucleotide repeats of GCG (GCG)6. The above results suggest that mutated GCG repeats in PABPN1 gene may cause OPMD in this family, and PABPN1 genotyping could be used as a convenient, highly effective, and reliable gene diagnostic test for OPMD patients. J. Clin. Lab. Anal. 24:422–425, 2010. © 2010 Wiley‐Liss, Inc.
Impact of culture on tourist decision‐making styles
Authors: Correia Antónia , Kozak Metin , Ferradeira João 
Published: November 2010

ABSTRACTThis paper developed and tested an integrative model to examine the relationship between tourism decisions and their cultural background. The model was tested using surveyed data from 400 tourists travelling to Lisbon, a cultural city and the capital of Portugal. The results of a structural equation analysis revealed that culture affect tourist decisions. The decision to visit Lisbon relies on its quality, brand and price. This decision is shaped by the likelihood of visitors to accept social differentiation (power distance), moderated by their sense of individualism as well as their long‐term orientation. Implications and suggestions for future research are discussed. Copyright © 2010 John Wiley & Sons, Ltd.
Are posttraumatic stress disorder mental health terms found in SNOMED‐CT medical terminology
Authors: Trusko Brett , Rosenbloom S. Trent , Montella Diane , Jackson James C. , Fitzhenry Fern , Brown Steven H. , Elkin Peter L. , Fielstein Elliot , Kotter Kristen , Tuttle Mark , Iannelli Richard J. , Speroff Theodore 
Published: November 2010

AbstractThe authors sought to evaluate how well the Systematized Nomenclature of Medicine–Clinical Terms (SNOMED–CT) controlled vocabulary represents terms commonly used clinically when documenting posttraumatic stress disorder (PTSD). A list was constructed based on the PTSD criteria in the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM‐IV; American Psychiatric Association, 1994), symptom assessment instruments, and publications. Although two teams mapping the terms to SNOMED–CT differed in their approach, the consensus mapping accounted for 91% of the 153 PTSD terms. They found that the words used by clinicians in describing PTSD symptoms are represented in SNOMED–CT. These results can be used to codify mental health text reports for health information technology applications such as automated chart abstraction, algorithms for identifying documentation of symptoms representing PTSD in clinical notes, and clinical decision support.
Convenient Vector Spaces of Smooth Functions
Authors: Kriegl A. , Nel L. D. 
Published: November 2010

AbstractBy a convenient vector space is meant a locally convex IR‐vector space which is separated, bornological and Mackey‐complete. The theory of such spaces, initiated in [Kr 82], [Fr 82], and [FGK 83], has evolved into a book [FK 88]. In the preliminaries below we outline the principal features of this theory relevant to this paper. We are concerned mainly with questions about the reflexiveness of spaces C∞(X, ℝ) for various X and matters closely related to this.
On Ill‐Determined Equations in Right Invertible Operator of Order one in Non‐Commutative Case
Authors: Mau Nguyen Van 
Published: November 2010

AbstractIn this paper we study a general equation in right invertible operator of order one in the case when either resolving operator I‐AR or I‐RA has a generalized almost inverse only. Moreover, we give the positive answer to the following question: Does the left invertibility (right invertibility, invertibility) of I‐AR imply the left invertibility (right invertibility, invertibility) of the operator I‐RA? (cf. [1], Open Question on p. 140).
On the Description of the Content‐Equality by a Relation
Authors: Jaritz Renate 
Published: November 2010

AbstractIn the geometry of polyhedra we understand by an elementary content‐functional a real valued, non‐negative, finite additive measure on the set of polyhedra which is invariant under isometries. There are close relations between the content‐measurement and the relation of equidecomposability. Two polyhedra are called equidecomposable if they are decomposed into pairwise congruent pieces. For an example we consider the set of all polygons in the euclidean plane. It is well known that planar polygons have the same area if and only if they are equidecomposable. In the three‐dimensional euclidean space one also can describe the content‐equality of polyhedra by a relation. Two polyhedra have the same volume if they are equidecomposable with respect to equiaffine mappings (see [3]). In [4] the concept of an invariant content of polyhedra in a topological Klein space is introduced. Each regular closed quasicompact set ot the space is called polyhedron. Under this supposition two polyhedra have equal contents if they are equivalent by decomposition. The relation “equivalent by decomposition” is closely related to the relation “equidecomposable”.
Periodic Solutions of Linear Integro‐Differential Equations
Authors: Burton T. A. , Eloe P. W. , Islam M. N. 
Published: November 2010

AbstractUsing a degree‐theoretic result of Granas, a homotopy is constructed enabling us to show that if there is an a priori bound on all possible T‐periodic solutions of a Volterra equation, then there is a T‐periodic solution. The a priori bound is established by means of a Liapunov functional. The latter result is unusual in that no bounds on the Liapunov functional are required. Thus, in addition to the periodic solution, the equation may have both bounded and unbounded Solutions.
Quadratic Control for Stochastic Systems Defined by Evolution Operators and Square Integrable Martingales
Authors: Tudor C. 
Published: November 2010

AbstractThe infinite dimensional version of the linear quadratic cost control problem is studied by Curtain and Pritchard [2], Gibson [5] by using Riccati integral equations, instead of differential equations. In the present paper the corresponding stochastic case over a finite horizon is considered. The stochastic perturbations are given by Hilbert valued square integrable martingales and it is shown that the deterministic optimal feedback control is also optimal in the stochastic case. Sufficient conditions are given for the convergence of approximate solutions of optimal control problems.
Generalized Cauchy Spaces
Authors: Eklund Patrik , Gähler Werner 
Published: November 2010

AbstractIn this paper a unified theory of Cauchy spaces is presented including the classical cases of filter and sequence Cauchy spaces. To by‐pass a lattice‐theoretical barrier the notion of Urysohn modification of a functor is introduced. Employing this notion for many types of generalized Cauchy spaces a completion method is given.
Decompositions in Edge and Corner Singularities for the Solution of the Dirichlet Problem of the Laplacian in a Polyhedron
Authors: Petersdorff T. V. , Stephan E. P. 
Published: November 2010

AbstractThe solution of the three‐dimensional Dirichlet problem for the Laplacian in a polyhedral domain has Special singular forms at corners and edges. The main result of this paper is a “tensor‐product” decomposition of those singular forms along the edges. Such a decomposition with both edge singularities, additional corner singularities and a smoother remainder refines known regularity results for the solution where either the edge singularities are of non‐tensor product form or the remainder term belongs to an anisotropic Sobolev space for data given in an isotropic Sobolev space.
Extensions of Positive Definite Fredholm Operators with Partially Zero Inverse
Authors: Bakonyi Mihaly , Woerdeman Hugo J. 
Published: November 2010

AbstractConsidered is the problem of adjusting a positive definite operator in order to obtain a partially zero inverse. Using generalized determinants the problem is settled for operator matrices with Hilbert Schmidt off diagonal entries. For Fredholm integral operators an approximation result is obtained.
On the Poles of the Local Resolvent
Authors: Bermúdez Teresa , González Manuel , Martinón Antonio 
Published: November 2010

AbstractWe give two characterizations of the isolated singularities of the local resolvent function of an operator T ε L(X) at a point ε of a complex Banach space X: in terms of a suitable decomposition of ε, and in terms of the existence of a sequence in X related with the Laurent series of the local resolvent function. Moreover, we introduce the locally chain‐finite operators at a point ε and show that T is chain‐finite if and only if T is locally chain‐finite at every χ ε X.
Starshapedness of Level Sets for Solutions of Nonlinear Elliptic Equations
Authors: Francini Elisa 
Published: November 2010

AbstractWe introduce a measure for the starshapedness of the level sets of solutions of certain nonlinear elliptic equations in a starshaped ring Ω of IRn. We prove that a function which characterizes the starshapedness does not attain its minimum in Ω.
Integrability Properties of the Maximal Operator on Partial Sums of Fourier Series in Orlicz Spaces
Authors: Kitax Hiro‐O 
Published: November 2010

AbstractLet S* (f be the majorant function of the partial sums of the trigonometric Fourier series of f. In this paper we consider the Orlicz space Lπ and give a generalization of Soria's result [S1]. Let π (t) be a concave function with some nice properties and

. If there exists a positive constant a0 < 1 such that

then we have

.
Bounded and Almost Periodic Solutions of Linear High‐Order Hyperbolic Equations
Authors: Shirikyan Armen , Volevich Leonid 
Published: November 2010

AbstractThe present paper is devoted to investigating high‐order strictly hyperbolic operators with nearly constant coefficients. The invertibility of these operators in spaces of functions uniformly bounded or almost periodic in time is established, provided the symbol of the operator in question has no roots in an open strip containing the real line. Under the additional condition that the strip coincides with a half‐plane, exponentially decaying solutions of the nonhomogeneous equation with right‐hand side of exponential decay are constructed. In the case of equations with constant coefficients the necessity of the derived conditions is proved. The results of this paper were announced without proofs in [SV].
Zur Klassifikation Vierdimensionaler Reeller Divisionsalgebren
Authors: Dieterich Ernst 
Published: November 2010

AbstractZu jeder Konfiguration des IR3, welche aus einem Ellipsoid in Hauptachsenform und einem Punktepaar besteht, wird eine vierdimensionale reelle Divisionsalgebra konstruiert. Diese Konstruktion induziert eine Bijektion zwischen den Äquivalenzklassen von Konfigurationen und den Isomorphieklassen vierdimensionaler potenzassoziativer reeller Divisionsalgebren. Hierbei sind zwei Konfigurationen genau dann äquivalent, wenn ihre Ellipsoide übereinstimmen und ihre Punktepaare in derselben Bahn unter der Operation der eigentlichen Symmetriegruppe des Ellipsoids liegen. Ein Querschnitt für die Äquivalenzklassen von Konfigurationen wird angegeben.
Nonexistence of Solutions and an Anti‐Maximum Principle for Cooperative Systems with the p‐Laplacian
Authors: Fleckinger‐Pelle Jacqueline , Gossez Jean‐Pierre , Takáĉ Peter , de Thélin François 
Published: November 2010

AbstractWe obtain a nonexistence result and an anti‐maximum principle for weak solutions u = (u1,…, un) to the following strictly cooperative elliptic system,
equation image
Here, Ω C IRN is a bounded domain with a C2,α ‐ boundary δΩ, for some α ∈ (0,1), Δp denotes the p‐Laplacian defined by Δpu = div (|∇u|p‐2∇u) for p 6 (1,∞), and the coefficients aij (1 ≤ i,j ≤ n) are assumed to be constants satisfying aij > 0 for i ≠ j (a strictly cooperative system). We assume 0 ≤ fi, ∈ L∞(Ω) (1 ≤ i ≤ n). For ∇+ = ∇‐ ∇‐ = ∈ IR and f = (f1,…,fn) 0 in Ω, let μ1 denote the first eigenvalue of the (p ‐ 1)‐homogeneous system (S). Assuming f ≠ 0 in Ω, we show: (i) if ∧+ = ∧‐ = μ1, then (S) has no solution; and (ii) if ∧+, ∧‐ ∧ (μ1,μ1 + δ), for some δ > 0 small enough, then ui < 0 in Ω and δui/δv > 0 on δΩ (1 ≤ i ≤ n). Our methods for the system (S) are completely different from the case n = 1 (a single equation). For n ≥ 2 and p ≥ 2, mild additional hypotheses are imposed on the domain Ω and the matrix
equation image
.
Canonical Systems with Rational Spectral Densities: Explicit Formulas and Applications
Authors: Gohberg I. , Kaashoek M. A. , Sakhnovich A. L. 
Published: November 2010

AbstractThis paper solves explicitly the direct spectral problem of canonical differential systems for a special class of potentials. For a potential from this class the corresponding spectral function may have jumps and its absolutely continuous part has a rational derivative possibly with zeros on the real line. A direct and self‐contained proof of the diagonalization of the associated differential operator is given, including explicit formulas for the diagonalizing operator and the spectral function. This proof also yields an explicit formula for the solution of the inverse problem. As an application new representations are derived for a large class of solutions of nonlinear integrable partial differential equations. The method employed is based on state space techniques and uses the idea of realization from mathematical system theory.
Determinants of Regular Singular Sturm ‐ Liouville Operators
Authors: Lesch Matthias 
Published: November 2010

AbstractWe consider a regular singular Sturm‐Liouville operator
equation image
on the line segment (0,1]. We impose certain boundary conditions such that we obtain a semi‐bounded self‐adjoint operator. It is known (cf. Theorem 1.1 below) that the ζ‐function of this operator
equation image
has a meromorphic continuation to the whole complex plane with 0 being a regular point. Then, according to [RS] the ζ ‐ regularized determinant of L is defined by
equation image
In this paper we are going to express this determinant in terms of the solutions of the homogeneous differential equation Ly = 0 generalizing earlier work of S. Levit and U. Smilansky [LS], T. Dreyfus and H. Dym [DD], and D. Burghelea, L. Friedlander and T. Kappeler [BFK1, BFK2). More precisely we prove the formula
equation image
Here ϕ ψ is a certain fundamental system of solutions for the homogeneous equation Ly = 0, W(ϕ ψ), denotes their Wronski determinant, and v0, v1 are numbers related to the characteristic roots of the regular singular points 0, 1.
Oscillation and Nonoscillation Criteria for Second Order Linear Differential Equations
Authors: Li Horng‐Jaan , Yeh Cheh‐Chih 
Published: November 2010

AbstractOscillation and nonoscillation criteria are established for the second order linear differential equation
equation image
under the hypothesis that p(t) > 0 and
equation image
where a(t) ∈ C2([t0,∞);(0,∞)) is a given function. These results improve some well‐known oscillation and nonoscillation criteria.
The Point Spectrum of Unitary Dilations in Kreĭ Spaces
Authors: Temme Dirk 
Published: November 2010

AbstractFor a bicontractive operator T on a Kreĭ space the connections between its eigenvalues and eigenstructure and the eigenvalues and eigenstructure of its minimal unitary dilation U are studied. For eigenvalues on the unit circle of T in general only part of the eigenspace of T will return its an eigenspace of U and the corresponding eigenvalue will be a singular critical point of U.
Invariant Operators and the Berezin Transform on Cartan Domains
Authors: Engliš Miroslav 
Published: November 2010

AbstractLet Ω be an irreducible Cartan domain of rank r and genus p and Bv (c > p ‐ 1) be the Berezin transform on Ω. It is known that as v tends to infinity, the Berezin transform admits the asymptotic expansion Bν∼∑k=0∞ Qkν−k where the Qk's are certain invariant differential operators — for instance, Q0 is the identity and Q1 is the Laplace ‐ Beltrami operator. [See A. Unterberger and H. Upmeier, Comm. Math. Phys. 164 (1994), 563–598.] In the present paper we show that the operators Qk generate the whole ring of invariant differential operators on Ω; in fact, Q1, Q3,…, Q2r‐1 and Q0 form a set of free generators. A bounded version of this result is also given: for any v > p ‐ 1, the r+1 operators Bv, Bv+1,…, Bv+r are a set of generators for the von Neumann algebra 3 of all G ‐ invariant bounded linear operators on L2(Ω); this algebra can be identified with the algebra of all L2 ‐ bounded Fourier multipliers, or of all bounded operators which are functions, in the L2 ‐ spectral‐theoretic sense, of certain normal extensions of the invariant differential operators.