bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analytic Extension of Non Quasi ‐ Analytic Whitney Jets of Beurling Type
Authors: Schmets Jean , Valdivia Manuel 
Published: November 2010

AbstractLet (Mr)r∈ℕ0 be a logarithmically convex sequence of positive numbers which verifies M0 = 1 as well as Mr ≥ 1 for every r ∈ ℕ and defines a non quasi ‐ analytic class. Let moreover F be a closed proper subset of ℝn. Then for every function f on ℝn belonging to the non quasi ‐ analytic (Mr)‐class of Beurling type, there is an element g of the same class which is analytic on ℝ,n F and such that Dαf(x) = Dαg(x) for every α ∈ ℕn0 and x ∈ F.
The k ‐ Very Ampleness and k ‐ Spannedness on Polarized Abelian Surfaces
Authors: Terakawa Hiroyuki 
Published: November 2010

AbstractWe give a numerical criterion for an ample line bundle on an abelian surface to be it‐very ample for a nonnegative integer k. This result implies the equivalence of k‐very ampleness and k‐spannedness. We also give a complete classification of polarized abelian surfaces with k ‐ very ample polarizations. Our results extend those of Bauer and Szemberg [BaSzl] and Ramanan [Ra].
Picard Operators
Authors: Weikard Rudi 
Published: November 2010

AbstractA linear differential expression Ly = y(n) + qn‐2yn‐2 +…+ q0y is called a Picard expression if its coefficients are elliptic functions (with common fundamental periods) and if the general solution of Ly = Ey is an everywhere meromorphic function (with respect to the independent variable) for all E ∈ ℂ.If L is a Picard expression we show that the differential equation Ly = Ey has n linearly independent Floquet solutions except when E is any of a finite number of exceptional values. Also the conditional stability set of a Picard expression (and hence the spectrum of the associated operator in L2(ℝ)) consists of finitely many regular analytic arcs.
Reconstruction from Line Integrals in Spaces of Constant Curvature
Authors: Palamodov Victor P. 
Published: November 2010

AbstractNew reconstruction formula for the line integral transformation in Euclidean spaces is found. The general k‐plane integral transform in Euclidean space is related to a totally geodesic integral transform for an arbitrary Riemannian space of constant curvature by means of a factorization property. Duality theorems for the totally geodesic transforms are stated.
On Subspaces of the Spaces L and of Their Strong Duals
Authors: Albanese Angela A. 
Published: November 2010

AbstractFor Ω an open subset of IRN and 1 < p < ∞, we prove that any complemented subspace E of Lploc (Ω) contains either a complemented copy of (l2)IN or a complemented copy of (lp)IN, provided ≈︁ F ≈︁ and ω and ≈︁ ω⊕ F with F Banach space. We also prove that any complemented subspace E of (Lploc(Ω))1β contains either a complemented copy of (l2)(IN) or a complemented copy of (lp)(IN), provided E ≈︁ F, ≈︁ π and ≈︁ π ⊕ F with F Banach space.
Operator Ideals, Orthonormal Systems and Lacunary Sets
Authors: Baur Franziska 
Published: November 2010

AbstractGiven an orthonormal system B in some L2(u) we consider the operator ideals IIB and TB of B‐summing and B‐type operators and some related ideals. We characterize by certain weak compactness properties when IIB is equal to the operator ideal II2 of 2‐summing operators. In lose that B consists of characters of a compact abelian group we characterize when IIB coincides with the operator ideal IIγ of Gauss‐summing operators and when TB coincides with the operator ideal IIp of type‐2 operators. Moreover, we give a necessary and sufficient condition for Fig to contain the operator ideal IIp of p‐summing operators (2 < p < ∞) and for TB to contain the operator ideal Γp of p ‐ factorable operators.
Stability of Bifurcating Periodic Solutions of Differential Inequalities in IR3
Authors: Kučera Milan 
Published: November 2010

AbstractA bifurcation problem for the inequality

, is considered, where K is a closed convex cone in IR3, Aλ a real 3×3 matrix depending continuously on a real parameter λ, G a small perturbation. Small periodic solutions bifurcating at λ0 from the branch of trivial solutions are studied. It is proved that these solutions are stable or they are contained in a certain attracting set Aλ if they correspond to parameters λ for which the trivial solution is unstable. Further, unstable solutions exist among them if they correspond to parameters for which the trivial solution is stable.
Entropy, Approximation Quantities and the Asymptotics of the Modulus of Continuity
Authors: Richter Christian 
Published: November 2010

AbstractThe paper deals with the approximation of bounded real functions f on a compact metric space (X, d) by so‐called controllable step functions in continuation of [Ri/Ste]. These step functions are connected with controllable coverings, that are finite coverings of compact metric spaces by subsets whose sizes fulfil a uniformity condition depending on the entropy numbers εn(X) of the space X. We show that a strong form of local finiteness holds for these coverings on compact metric subspaces of IRm and Sm. This leads to a Bernstein type theorem if the space is of finite convex information. In this case the corresponding approximation numbers εn(f) have the same asymptotics its ω(f, εn(X)) for f ε C(X). Finally, the results concerning functions f ε M(X) and f ε C(X) are transferred to operators with values in M(X) and C(X), respectively.
On Possible Singular Solutions to the Navier — Stokes Equations
Authors: Málek Josef , Nečas Jindřich , Pokorný Milan , Schonbek Maria E. 
Published: November 2010

AbstractIn this paper, we exclude the possibility of existence of a singular solution of the selfsimilar type proposed by Jean Leray More precisely, using a slightly stronger hypothesis we give a simpler proof to the analogous result established by J. Nečas, M. Rúžička and V. Šverák. We also discuss the possible existence of a singular solution of pseudo‐selfsimilar type.
Local Solutions of Weakly Parabolic Semilinear Differential Equations
Authors: Dreher Michael , Pluschke Volker 
Published: November 2010

AbstractSemilinear parabolic boundary value problems with degenerated elliptic part where the right‐hand side depends on the solution are studied. We approximate the parabolic semilinear problem by a system of linear degenerate elliptic problems by the aid of semidiscretization in time. Using weighted Sobolev spaces one derives a‐priori‐estimates for the approximate solutions. These approximate solutions converge to a uniquely determined weak solution, if the time interval is sufficiently small. We point out that the nonlinear right‐hand side is defined only in a neighbourhood of the initial data, therefore one has to prove L∞‐estimates for the solutions of the approximate problems.
Integral Operators in Sobolev Spaces on Domains with Boundary
Authors: Witte Jörg 
Published: November 2010

AbstractProperties of integral operators with weak singularities arc investigated. It is assumed that G ⊂ ℝn is a bounded domain. The boundary δG should be smooth concerning the Sobolev trace theorem. It will be proved that the integral operators \documentclass{article}\pagestyle{empty}\begin{document}$\int {_G \frac{{f\left(\Theta \right)}}{{x - y|^{n - 1} }}u\left(\nu \right)d\partial G_\nu }$\end{document} and \documentclass{article}\pagestyle{empty}\begin{document}$ \int {_{\partial G} \frac{{f\left(\Theta \right)}}{{|x - y|^{n - 1} }}u\left(y \right)d\partial G_y }$\end{document} maps Wpk(G) into Wpk+1(G) and Wpk−1(G) into Wpk/p(G), respectively, and are bounded. Here θ ∈ S ⊂ ℝn, where S is the unit sphere. Furthermore, f possesses bounded first order derivatives and is bounded on S. Then applications to first order systems are discussed.
On Contact Submanifolds in Complex Projective Spaces
Authors: Djorić Mirjana , Okumura Masafumi 
Published: November 2010

AbstractWe treat n‐dimensional real submanifolds of complex projective spaces in the case when the maximal holomorphic tangent subspace is (n ‐ 1)‐dimensional. In particular, we study the case when the induced almost contact structure on a submanifold is contact, we establish a few characteristics of the shape operator with respect to the distinguished vector field and we give one characterization of a contact submanifold in this case
On Auslander‐Reiten Quivers of Enveloping Algebras of Restricted Lie Algebras
Authors: Farnsteiner Rolf 
Published: November 2010

AbstractLet (L, [p]) be a finite dimensional restricted Lie algebra over an algebraically closed field F of characteristic p ≥ 3, X ∈ L* a linear form. In this article we study the Auslander‐Reiten quivers of certain blocks of the reduced enveloping algebra u(L,x). In particular, it is shown that the enveloping algebras of supersolvable Lie algebras do not possess AR‐components of Euclidean type.
On the Generalized Ray‐Singer Conjecture for Covering Spaces
Authors: Gong Donggeng 
Published: November 2010

AbstractWe find a relation between L2 ‐combinatorial torsion and analytic torsion associated with a small spectrum of the Witten‐type Laplacian on a covering space. The result is used as one crucial step in a proof of the generalized Ray‐Singer conjecture for covering spaces.
Algebraic Independence of Sums of Reciprocals of the Fibonacci Numbers
Authors: Nishioka Kumlko , Tanaka Taka‐Aki , Toshimitsu Takeshi 
Published: November 2010

AbstractAlgebraic independence of the numbers
equation image
where {Rn}n≥0 is a sequence of integers satisfying a binary linear recurrence relation and {bh}h≥0 is a periodic sequence of algebraic numbers not identically zero, are studied.
A New Class of Soliton Solutions for the (Modified) Kadomtsev‐Petviashvili Equation
Authors: Renger Walter 
Published: November 2010

AbstractWe construct solutions of the Kadomtsev‐Petviashvili equation and its counterpart, the modified Kadomtsev‐Petviashvili equation, with an infinite number of solitons by a careful examination of the limits of N‐ soliton solutions as N → ∞. We give sufficient conditions to ensure that these limits exist and satisfy the (modified) Kadomtsev‐Petviashvili equation.
Screen Problem for Vector Helmholtz Equation
Authors: Sigua L. 
Published: November 2010

AbstractThe paper deals with the screen boundary value problem for vector Helmholtz equation in the three‐dimensional space. Using the method of boundary integral equations and the theory of elliptic pseudodifferential operators on manifolds with boundary we prove uniqueness and existence theorems in Bessel‐potential and Besov spaces and establish Cα‐smoothness (with α < 1/2) of solutions up to the boundary.
Cartilage ultrastructure in proteoglycan‐deficient zebrafish mutants brings to light new candidate genes for human skeletal disorders
Authors: Wiweger Malgorzata I , Avramut Cristina M , de Andrea Carlos E , Prins Frans A , Koster Abraham J , Ravelli Raimond BG , Hogendoorn Pancras CW 
Published: November 2010

AbstractProteoglycans are molecules consisting of protein cores onto which sugar chains, i.e., glycosaminoglycans (GAGs) such as heparan or chondroitin sulphates, are attached. Proteoglycans are produced by nearly all cells, and once secreted they become a major component of the extracellular matrix. Cartilage is particularly rich in proteoglycans, and changes in the structure and composition of GAGs have been found in osteochondromas and osteoarthritis. The zebrafish (Danio rerio) exhibits fast development, a growth plate‐like organization of its craniofacial skeleton and an availability of various mutants, making it a powerful model for the study of human skeletal disorders with unknown aetiology. We analysed skeletons from five zebrafish lines with known mutations in genes involved in proteoglycan synthesis: dackel (dak/ext2), lacking heparan sulphate; hi307 (β3gat3), deficient for most GAGs; pinscher (pic/slc35b2), presenting defective sulphation of GAGs and other molecules; hi954 (uxs1), lacking Notch and most GAGs due to impaired protein xylosylation; and knypek (kny/gpc4), missing the protein core of the Glypican‐4 proteoglycan. Here we show that each mutant displays different phenotypes related to: (a) cartilage morphology; (b) composition of the extracellular matrix; (c) ultrastructure of the extracellular matrix; and (d) the intracellular ultrastructure of chondrocytes, proving that sulphated GAGs orchestrate the cartilage intra‐ and extracellular ultrastructures. The mild phenotype of the hi307 mutant suggests that proteoglycans consisting of a protein core and a short sugar linker might suffice for proper chondrocyte stacking. Finally, knypek supports the involvement of Glypican‐4 in the craniofacial phenotype of Simpson–Golabi–Behmel syndrome and suggests GPC4 as a modulator of the overgrowth phenotype that is associated with this syndrome and is primarily caused by a mutation in GPC3. Moreover, we speculate on the potential involvement of SLC35B2, β3GAT3 and UXS1 in skeletal dysplasias. This work promotes the use of zebrafish as a model of human skeletal development and associated pathologies. Copyright © 2011 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Performance comparison of AlGaAs, GaAs and InGaP tunnel junctions for concentrated multijunction solar cells
Authors: Wheeldon Jeffrey F. , Valdivia Christopher E. , Walker Alexandre W. , Kolhatkar Gitanjali , Jaouad Abdelatif , Turala Artur , Riel Bruno , Masson Denis , Puetz Norbert , Fafard Simon , Arès Richard , Aimez Vincent , Hall Trevor J. , Hinzer Karin 
Published: November 2010

AbstractFour tunnel junction (TJ) designs for multijunction (MJ) solar cells under high concentration are studied to determine the peak tunnelling current and resistance change as a function of the doping concentration. These four TJ designs are: AlGaAs/AlGaAs, GaAs/GaAs, AlGaAs/InGaP and AlGaAs/GaAs. Time‐dependent and time‐average methods are used to experimentally characterize the entire current–voltage profile of TJ mesa structures. Experimentally calibrated numerical models are used to determine the minimum doping concentration required for each TJ design to operate within a MJ solar cell up to 2000‐suns concentration. The AlGaAs/GaAs TJ design is found to require the least doping concentration to reach a resistance of <10−4 Ω cm2 followed by the GaAs/GaAs TJ and finally the AlGaAs/AlGaAs TJ. The AlGaAs/InGaP TJ is only able to obtain resistances of ≥5 × 10−4 Ω cm2 within the range of doping concentrations studied. Copyright © 2010 John Wiley & Sons, Ltd.
Building interacting partner predictors using co‐varying residue pairs between histidine kinase and response regulator pairs of 48 bacterial two‐component systems
Authors: Choi Kwangmin , Kim Sun 
Published: November 2010

AbstractThe two‐component system (TCS) is a signal transduction system that involves a histidine kinase (HK) and a response regulator (RR). Although up to hundreds of TCSs may operate in parallel in a bacterial cell, the high‐fidelity of a TCS signaling is well maintained, minimizing irrelevant crosstalk between TCSs. When a HK gene and a RR gene in a given TCS system exist in neighboring positions, it is almost certain that their protein products (i.e., HK and RR) are interacting partners. However, large bacterial genomes often have multiple HK genes and/or cognate RR genes that are not neighboring positions. In many partially assembled genomes, some HK genes and RR genes belong to different contigs. In these cases, it is not clear which HK(s) and RR(s) interact. By combining information‐theoretic and graph‐theoretic approaches, we developed a computational method identifying co‐evolving residue pairs between HKs and cognate RRs and predicting the interacting HK:RR pairs for each TCS. In addition, we built a TCSppWWW webserver (http://compath.org/platcom/tcs) that takes query sequences of pairing candidates and predicts their HK:RR pairing using precomputed models. The current release of TCSppWWW provides predictors for 48 TCSs using over 20,000 protein sequences from about 900 bacterial genomes. Three different types of predictors using Random Forest, RBF Network, and Naïve Bayes are provided. Once a set of HK and RR candidate sequences are submitted, TCSppWWW aligns query sequences to the precomputed multiple sequence alignment of HK:RR pairs, extracts co‐evolving column positions, then returns prediction results with prediction margin and additional information. Proteins 2011. © 2010 Wiley‐Liss, Inc.
Optical property and thermal stability of Mo/Mo–SiO2/SiO2 solar‐selective coating prepared by magnetron sputtering
Authors: Wang Jian , Wei Baocheng , Wei Qirui , Li Dejie 
Published: November 2010

AbstractMo/Mo–SiO2/SiO2 solar‐selective coating for high‐temperature solar thermal application is prepared on quartz glass by direct‐current (DC) and radio‐frequency (RF) co‐sputtering. The normal solar absorptance αn = 0.95 and thermal emittance εn = 0.097 (353 K) are obtained through process optimization. The normal reflectance Rn(λ) before and after 1073 K vacuum annealing, are measured by ultraviolet–visible–infrared (UV–VIS–IR) and Fourier transform infrared (FT‐IR) spectroscopy. There is only a slight increase in Rn(λ) in IR region after annealing, which results in a lower εn = 0.075 (353 K). The crystallized grain of Mo in the coating, obtained from XRD pattern, increased from 23 to 60 nm after vacuum annealing. These phenomena are mainly caused by the change of crystal state and reflectance of Mo IR layer according to the comparison of Rn(λ) and XRD patterns of Mo/SiO2 and Mo–SiO2/SiO2 tandem films.magnified image
The near‐normal reflectance of Mo/Mo–SiO2/SiO2 solar‐selective coating before and after 1073 K vacuum annealing.
Annealing effect on local nucleation fields in bistable microwires
Authors: Ipatov M. , Zhukova V. , Gonzalez J. , Zhukov A. 
Published: November 2010

AbstractWe have investigated the influence of annealing on the local nucleation fields distribution in amorphous magnetically bistable microwires. The measurements have quite surprisingly shown a considerable increase of the local nucleation fields after annealing of the wire, although it is generally expected that thermal annealing without a magnetic field relieves the internal stresses, which results in a reduction of the nucleation fields. The increase of the local nucleation fields is explained by the disappearance of local inhomogeneities after annealing.
A mechanism for moistening the lower stratosphere involving the Asian summer monsoon
Authors: Dethof A. , O'Neill A. , Slingo J. M. , Smit H. G. J. 
Published: November 2010

AbstractThis study employs European Centre for Medium‐Range Weather Forecasts (ECMWF) re‐analysis data and the contour advection technique to investigate the water vapour distribution in the upper troposphere and lower stratosphere. Water vapour is the primary greenhouse gas and understanding the processes which determine its distribution and transport is crucial. Of special interest is the exchange of water vapour across the tropopause. This study considers how the Asian summer monsoon affects the moisture budget of the upper troposphere and lower stratosphere. The region of the Asian summer monsoon is identified as a significant moisture source for the upper troposphere outside the deep tropics. Monsoon convection moistens the region of the upper‐level monsoon anticyclone which is located close to the dynamical tropopause, where isentropes cross from the troposphere into the stratosphere. An isentropic analysis reveals that transport from the troposphere into the stratosphere in this region is normally prevented by the strong potential‐vorticity gradients around the tropopause. However, midlatitude synoptic disturbances occasionally interact with the monsoon anticyclone and pull filaments of tropospheric air from its northern flank. These filaments, characterized by high values of humidity and low values of potential vorticity, can extend far north and transport moisture irreversibly into the northern hemisphere lower stratosphere. MOZAIC (Measurement of OZone by Airbus In‐service airCraft) data are used as an independent data source to validate the results obtained from the ECMWF analyses.
A mechanism relating tropical Atlantic spring sea surface temperature and west African rainfall
Authors: Zheng Xinyu , Eltahir Elfatih A. B. , Emanuel Kerry A. 
Published: November 2010

AbstractIn this paper, we describe a mechanistic study on the role of tropical Atlantic sea surface temperature (SST) variability in the dynamics of the west African monsoon. A hypothesis that a warm spring (April‐June) SST results in a wet monsoon is explored using a moist, zonally symmetric model. A positive spring rainfall anomaly has been simulated over the ocean, in response to the warm SST, which then propagates onto the land and persists two to three months, even after the SST anomaly vanishes. While the ocean‐atmosphere interaction is crucial for the initial development of the rainfall anomaly over land, the interactions between the ocean, land, and atmosphere are found to be important for relating tropical Atlantic spring SST to west African rainfall. Furthermore, the positive feedback between rainfall and soil moisture is responsible for some of the persistence in the rainfall anomaly. We present a case‐study for the wettest (1994) and driest (1992) years of the 1990s so far. The observations show that a warm spring SST anomaly in 1994 was associated with abundant summer rainfall over west Africa. These empirical observations are consistent with the proposed physical mechanism.
Kinematic characteristics of air flowing into and out of precipitating convection over the west Pacific warm pool: An airborne Doppler radar survey
Authors: Kingsmill David E. , Houze Robert A. 
Published: November 2010

AbstractAir flowing into and out of 25 cloud systems over the west Pacific warm pool was sampled by Doppler radars on board two NOAA WP‐3D aircraft and the NCAR Electra aircraft during the Tropical Ocean/Global Atmosphere Coupled Ocean‐Atmosphere Response Experiment (TOGA‐COARE). In convective cells, updraught inflows and downdraught outflows tended to be positioned adjacent to each other at sharp updraught‐downdraught interfaces sloping at various angles and directions. The updraught inflows were sometimes shallow and sometimes deep, often extending well above the boundary layer. Downdraught outflow magnitudes were usually stronger than updraught inflows, and the horizontal directions of the inflow and outflow were frequently offset from each other at angles of ˜|90°|.In stratiform precipitation regions, the dominant airflow features were descending mid‐level inflows, located at the bases of anvils and often extending into the interior of the precipitation system. These stratiform inflows originated at levels between 5 and 10 km and descended to about 3 km. A few extended down to the surface. Stratiform inflows were typically strong and sandwiched between weaker stratiform outflows at upper and lower altitudes. The stratiform‐region inflow and outflow directions were frequently offset by ˜|90°| in the horizontal. The mid‐level inflow currents entered the stratiform regions horizontally from a direction similar to that of the large‐scale ambient wind.The mid‐level stratiform inflow tended to occur in the same vertical plane as the convective downdraught outflow, although the mid‐level stratiform inflow appeared to be slowed by horizontal pressure gradients before connecting with the convective downdraught outflow. In other respects, the mesoscale systems differed from a simplified two‐dimensional model of airflow. The systems moved primarily by discrete propagation, and updraughts and downdraughts tended to have orthogonal horizontal relative airflow.