bluuebunny/crossref_metadata_2025 huggingface dataset:
A model of expanding HIV/AIDS education in Chinese rural areas
Authors: Wu Q , Liu G-T , Wang L-R , Wu Y-F , Wang X-l
Published: November 2009

The aim of the present study is to explore an effective model of HIV/AIDS health education for a rural Chinese population. Students in two middle schools were given HIV/AIDS health education. The education in Tiechang town was carried out in the form of delivering multimedia lectures, video tapes and brochures, while in Daping town brochures were distributed to students. After receiving health education, each student extended the health education to three peasants who were their relatives or neighbours. After the education was provided, the test scores of AIDS knowledge increased significantly in the students of Tiechang town (0.50 baseline, 0.69 post-test1, 0.68 post-test2). For the expansion subjects, the scores increased significantly (0.56 baseline versus 0.74 post-test) in the Tiechang group, and also increased mildly (0.52 baseline versus 0.59 post-test) in the Daping group. Empowering secondary school students to teach others about AIDS was a highly effective model for spreading AIDS prevention knowledge among the rural Chinese population.
Selenium and health-related quality of life in menopausal women
Authors: Llaneza Placido , González Celestino , Fernandez-Iñarrea José , Alonso Ana , Arnott Ignacio , Ferrer-Barriendos Javier
Published: November 2009

Objectives

The objective of this study was to evaluate whether there is a relation between serum selenium levels and health-related quality of life (HRQoL) in overweight and obese postmenopausal women.

Study design

A cross-sectional study was carried out in 104 overweight and obese postmenopausal women attending a gynaecological clinic for their annual gynaecological examination.

Main outcome measures

Age, anthropometric parameters, educational level, smoking habits, serum glucose, insulin, lipid profile, C-reactive protein, folic acid, vitamin B12, homocysteine and selenium levels were determined, and the Cervantes Scale was used to evaluate HRQoL.

Results

Serum selenium mean value levels were similar in the different groups of HRQoL and there were no differences in the four domains of the Cervantes Scale. When women were classified according to serum selenium tertiles, higher levels of serum cholesterol, low-density lipoprotein cholesterol (LDLc) and triglycerides were found in women in the lowest serum selenium tertile.

Conclusions

In overweight and obese postmenopausal women, serum selenium level is not related to HRQoL but higher levels of cholesterol, LDLc and triglyceride values were detected in women in the lowest serum selenium tertile.
Postmenopausal bleeding
Authors: Gale Alison , Dey P
Published: November 2009

Postmenopausal bleeding (PMB) is a symptom of possible gynaecological malignancy. According to present guidelines, women presenting with this symptom should be referred urgently to a team specializing in the management of gynaecological cancer, and be seen within two weeks of referral. Examination and investigation of these women should be able to exclude malignancy, while being acceptable to the patient and cost-effective. The gold standard modality of investigation to visualize the uterine cavity is hysteroscopy, but transvaginal scanning is recommended as the first-line investigation to select those who need further diagnostic evaluation. Hysteroscopy should be performed in women with a thickened endometrium on scan and women with recurrent episodes of bleeding despite negative scan findings. There have been very few studies that have examined women's knowledge, attitudes or concerns about PMB or its assessment. Further research would inform information and support strategies for women presenting and undergoing assessment for this symptom.
Improved free energy parameters for RNA pseudoknotted secondary structure prediction
Authors: Andronescu Mirela S. , Pop Cristina , Condon Anne E.
Published: November 2009

Accurate prediction of RNA pseudoknotted secondary structures from the base sequence is a challenging computational problem. Since prediction algorithms rely on thermodynamic energy models to identify low-energy structures, prediction accuracy relies in large part on the quality of free energy change parameters. In this work, we use our earlier constraint generation and Boltzmann likelihood parameter estimation methods to obtain new energy parameters for two energy models for secondary structures with pseudoknots, namely, the Dirks–Pierce (DP) and the Cao–Chen (CC) models. To train our parameters, and also to test their accuracy, we create a large data set of both pseudoknotted and pseudoknot-free secondary structures. In addition to structural data our training data set also includes thermodynamic data, for which experimentally determined free energy changes are available for sequences and their reference structures. When incorporated into the HotKnots prediction algorithm, our new parameters result in significantly improved secondary structure prediction on our test data set. Specifically, the prediction accuracy when using our new parameters improves from 68% to 79% for the DP model, and from 70% to 77% for the CC model.
Pumilio 2 controls translation by competing with eIF4E for 7-methyl guanosine cap recognition
Authors: Cao Quiping , Padmanabhan Kiran , Richter Joel D.
Published: November 2009

Pumilio 2 (Pum2) interacts with the 3′ UTR-containing pumilio binding element (PBE) of RINGO/SPY mRNA to repress translation in Xenopus oocytes. Here, we show that Pum2 also binds directly to the 5′ 7mG cap structure; in so doing, it precludes eIF4E from binding the cap. Using deletion analysis, we have mapped the cap interaction domain of Pum2 to the amino terminus of the protein and identified a conserved tryptophan residue that mediates this specific interaction. Reporter mRNA-based assays demonstrate that Pum2 requires the conserved tryptophan to repress translation in injected Xenopus oocytes. Thus, in addition to its suggested role in regulating poly(A) tail length and mRNA stability, our results suggest that vertebrate Pumilio can repress translation by blocking the assembly of the essential initiation complex on the cap.
Fixing Bankers' Pay
Authors: Bebchuk Lucian
Published: November 2009

Pay structures are the problem as articulated by Lucian Bebchuk.
Vapour Transport Mechanism in Osmotic Distillation Process
Authors: Thanedgunbaworn Ratchaneekorn , Jiraratananon Ratana , Nguyen Minh H
Published: November 2009

Osmotic distillation experiments were carried out using pure water as feed in order to investigate the mass transfer mechanism in the membrane. In the experiment, the hollow fibre modules with packing density of 30.6 and 61.2% were employed. The Dusty gas model was used to estimate the transport of vapour through the membrane. The results revealed that the water vapour transport in the membrane pores in this study followed the Knudsen-molecular diffusion transition model. The value of membrane mass transfer coefficient evaluated by the transition model was found to be 0.863 kg/m2.h.Pa which was in good agreement with the experimental value. The packing density of the module did not affect the membrane mass transfer coefficient. On the other hand, the membrane mass transfer coefficient depended on the temperature.
The Optimal Policy Combination of the Minimum Wage and the Earned Income Tax Credit
Authors: Malul Miki , Luski Israel
Published: November 2009

This paper evaluates the consequences of minimum wage (MW) and earned income tax credit (EITC) in a model with heterogeneous costs of investment in human capital. Our model studies the effects of a MW and an EITC on employment, productivity, and total output for two types of groups: those with a low cost of acquiring human capital and a long horizon of earnings (Type Ys); and those with a high cost of acquiring human capital and a short horizon of earnings (Type Os). We assume that Type Ys consider investing in human capital while Type Os have a certain predetermined level of human capital and do not consider changing it. Our model suggests that a government might consider imposing a MW exclusively for Type Y individuals and an EITC exclusively for Type O individuals. Some of the best effects of each policy would therefore be obtained and some of the worst consequences would be avoided.
The Relation Between the Type and Amount of Instruction and Growth in Children’s Reading Competencies
Authors: Sonnenschein Susan , Stapleton Laura M. , Benson Amy
Published: November 2009

A latent growth model was used to investigate the longer term efficacy of phonics and integrated language arts instruction as well as amount of such instruction on children’s reading development, using the nationally representative Early Childhood Longitudinal Study data set (kindergarten through fifth grade). Type and amount of instruction were derived from teachers’ ratings. Children’s entry-level skills and ethnicity were predictors of children’s reading scores at the end of kindergarten. Ethnicity and parents’ education level predicted rate of growth. Type and amount of reading instruction predicted children’s reading scores. However, effects for type of instruction were time-sensitive, occurring only in kindergarten and first grade. Although children benefit from instruction in decoding and comprehension skills, instruction may not be optimally tailored to children most at risk.
Big-Fish-Little-Pond Effect
Authors: Seaton Marjorie , Marsh Herbert W. , Craven Rhonda G.
Published: November 2009

Research evidence for the big-fish-little-pond effect (BFLPE) has demonstrated that attending high-ability schools has a negative effect on academic self-concept. Utilizing multilevel modeling with the 2003 Program for International Student Assessment database, the present investigation evaluated the generalizability and robustness of the BFLPE across 16 individual student characteristics. The constructs examined covered two broad areas: academic self-regulation based on a theoretical framework proposed by Zimmerman and socioeconomic status. Statistically significant moderating effects emerged in both areas; however, in relation to the large sample (N = 265,180), many were considered small. It was concluded that the BFLPE was an extremely robust effect given that it was reasonably consistent across the specific constructs examined.
Community development following gamma radiation at a pine–oak forest, Brookhaven National Laboratory, Long Island, New York1
Authors: Stalter Richard , Kincaid Dwight
Published: November 2009

We investigated a unique source of forest disturbance: gamma radiation. While the temporal patterns of ecological succession are well understood for the forests of eastern North America, this is not the case for massively irradiated forests. Our objective was to compare vascular plant community change after irradiation at the five vegetation zones described in 1962 by Woodwell at Brookhaven National Laboratory, Long Island, New York. No follow‐up studies have been done since the gamma radiation experiments were terminated in 1978. Ecological successional theory (e.g., Bormann and Likens, 1994, Likens and Bormann, 1995) does not explain long‐term forest recovery after radiation damage. Our null hypothesis was that 47 yr after initial gamma ray exposure, the sites would have recovered such that floristic composition would be the same as the pine–oak forest control. This hypothesis was rejected statistically. In 2007/2008, the five concentric zones of vegetation centered about the gamma source retained their floristic heterogeneity as measured by Jaccard coefficients.
Semi-Classical Wavefront Set and Fourier Integral Operators
Authors: Alexandrova Ivana
Published: November 2009

Here we define and prove some properties of the semi-classical wavefront set. We also define and study semi-classical Fourier integral operators and prove a generalization of Egorov’s theorem to manifolds of different dimensions.
Invariants and Coinvariants of the Symmetric Group in Noncommuting Variables
Authors: Bergeron Nantel , Reutenauer Christophe , Rosas Mercedes , Zabrocki Mike
Published: November 2009

We introduce a natural Hopf algebra structure on the space of noncommutative symmetric functions. The bases for this algebra are indexed by set partitions. We show that there exists a natural inclusion of the Hopf algebra of noncommutative symmetric functions in this larger space. We also consider this algebra as a subspace of noncommutative polynomials and use it to understand the structure of the spaces of harmonics and coinvariants with respect to this collection of noncommutative polynomials and conclude two analogues of Chevalley’s theorem in the noncommutative setting.
Transitive Factorizations in the Hyperoctahedral Group
Authors: Bini G. , Goulden I. P. , Jackson D. M.
Published: November 2009

The classical Hurwitz enumeration problem has a presentation in terms of transitive factorizations in the symmetric group. This presentation suggests a generalization from type A to other finite reflection groups and, in particular, to type B. We study this generalization both from a combinatorial and a geometric point of view, with the prospect of providing a means of understanding more of the structure of the moduli spaces of maps with an S2-symmetry. The type A case has been well studied and connects Hurwitz numbers to the moduli space of curves. We conjecture an analogous setting for the type B case that is studied here.
Asymptotic Properties for Increments of l∞-Valued Gaussian Random Fields
Authors: Choi Yong-Kab , Csörgő Miklós
Published: November 2009

This paper establishes general theorems which contain both moduli of continuity and large incremental results for l∞-valued Gaussian random fields indexed by a multidimensional parameter under explicit conditions.
The Geometry of the Weak Lefschetz Property and Level Sets of Points
Authors: Migliore Juan C.
Published: November 2009

In a recent paper, F. Zanello showed that level Artinian algebras in 3 variables can fail to have the Weak Lefschetz Property (WLP), and can even fail to have unimodal Hilbert function. We show that the same is true for the Artinian reduction of reduced, level sets of points in projective 3-space. Our main goal is to begin an understanding of how the geometry of a set of points can prevent its Artinian reduction from having WLP, which in itself is a very algebraic notion. More precisely, we produce level sets of points whose Artinian reductions have socle types 3 and 4 and arbitrary socle degree ≥ 12 (in the worst case), but fail to have WLP. We also produce a level set of points whose Artinian reduction fails to have unimodal Hilbert function; our example is based on Zanello's example. Finally, we show that a level set of points can have Artinian reduction that has WLP but fails to have the Strong Lefschetz Property. While our constructions are all based on basic double G-linkage, the implementations use very different methods.
On a Class of Projectively Flat Metrics with Constant Flag Curvature
Authors: Shen Z. , Civi Yildirim G.
Published: November 2009

In this paper, we find equations that characterize locally projectively flat Finsler metrics in the form , where is a Riemannian metric and is a 1-form. Then we completely determine the local structure of those with constant flag curvature.
Harmonic Coordinates on Fractals with Finitely Ramified Cell Structure
Authors: Teplyaev Alexander
Published: November 2009

We define sets with finitely ramified cell structure, which are generalizations of post-critically finite self-similar sets introduced by Kigami and of fractafolds introduced by Strichartz. In general, we do not assume even local self-similarity, and allow countably many cells connected at each junction point. In particular, we consider post-critically infinite fractals. We prove that if Kigami’s resistance form satisfies certain assumptions, then there exists a weak Riemannian metric such that the energy can be expressed as the integral of the norm squared of a weak gradient with respect to an energy measure. Furthermore, we prove that if such a set can be homeomorphically represented in harmonic coordinates, then for smooth functions the weak gradient can be replaced by the usual gradient. We also prove a simple formula for the energy measure Laplacian in harmonic coordinates.
Matrices Whose Norms Are Determined by Their Actions on Decreasing Sequences
Authors: Chen Chang-Pao , Huang Hao-Wei , Shen Chun-Yen
Published: November 2009

LetA = (aj,k)j,k≥1be a non-negative matrix. In this paper, we characterize thoseAfor which ∥A∥E,Fare determined by their actions on decreasing sequences, whereEandFare suitable normed Riesz spaces of sequences. In particular, our results can apply to the following spaces:ℓp,d(w, p), andℓp(w). The results established here generalize ones given by Bennett; Chen, Luor, and Ou; Jameson; and Jameson and Lashkaripour.
Polarization of Separating Invariants
Authors: Draisma Jan , Kemper Gregor , Wehlau David
Published: November 2009

We prove a characteristic free version of Weyl’s theorem on polarization. Our result is an exact analogue ofWeyl’s theorem, the difference being that our statement is about separating invariants rather than generating invariants. For the special case of finite group actions we introduce the concept of cheap polarization, and show that it is enough to take cheap polarizations of invariants of just one copy of a representation to obtain separating vector invariants for any number of copies. This leads to upper bounds on the number and degrees of separating vector invariants of finite groups.
Inverse Pressure Estimates and the Independence of Stable Dimension for Non-Invertible Maps
Authors: Mihailescu Eugen , Urbański Mariusz
Published: November 2009

We study the case of an Axiom A holomorphic non-degenerate (hence non-invertible) mapf: ℙ2ℂ → ℙ2ℂ, where ℙ2ℂ stands for the complex projective space of dimension 2. Letδs(x)denote a basic set for f of unstable index 1, and x an arbitrary point of Λ; we denote byδs(x)the Hausdorff dimension of∩ Λ, whereris some fixed positive number andis the local stable manifold atxof sizer;δs(x)is calledthe stable dimension at x. Mihailescu and Urba ńnski introduced a notion of inverse topological pressure, denoted by P−, which takes into consideration preimages of points. Manning and McCluskey studied the case of hyperbolic diffeomorphisms on real surfaces and give formulas for Hausdorff dimension. Our non-invertible situation is different here since the local unstable manifolds are not uniquely determined by their base point, instead they depend in general on whole prehistories of the base points. Hence our methods are different and are based on using a sequence of inverse pressures for the iterates off, in order to give upper and lower estimates of the stable dimension. We obtain an estimate of the oscillation of the stable dimension on Λ. When each pointxfrom Λ has the same numberd′of preimages in Λ, then we show thatδs(x)is independent of x; in factδs(x)is shown to be equal in this case with the unique zero of the mapt → P(tϕs−log d′). We also prove the Lipschitz continuity of the stable vector spaces over Λ; this proof is again different than the one for diffeomorphisms (however, the unstable distribution is not always Lipschitz for conformal non-invertible maps). In the end we include the corresponding results for a real conformal setting.
Closed and Exact Functions in the Context of Ginzburg–Landau Models
Authors: Savu Anamaria
Published: November 2009

For a general vector field we exhibit two Hilbert spaces, namely the space of so called closed functions and the space of exact functions and we calculate the codimension of the space of exact functions inside the larger space of closed functions. In particular we provide a new approach for the known cases: the Glauber field and the second-order Ginzburg–Landau field and for the case of the fourth-order Ginzburg–Landau field.
-Stable ASH Algebras
Authors: Toms Andrew S. , Winter Wilhelm
Published: November 2009

The Jiang–Su algebra has come to prominence in the classification program for nuclear C*-algebras of late, due primarily to the fact that Elliott’s classification conjecture in its strongest form predicts that all simple, separable, and nuclear C*-algebras with unperforated K-theory will absorb tensorially, i.e., will be -stable. There exist counterexamples which suggest that the conjecture will only hold for simple, nuclear, separable and -stable C*-algebras. We prove that virtually all classes of nuclear C*-algebras for which the Elliott conjecture has been confirmed so far consist of -stable C*-algebras. This follows in large part from the following result, also proved herein: separable and approximately divisible C*-algebras are -stable.
On the Hyperinvariant Subspace Problem. IV
Authors: Bercovici H. , Foias C. , Pearcy C.
Published: November 2009

This paper is a continuation of three recent articles concerning the structure of hyperinvariant subspace lattices of operators on a (separable, infinite dimensional) Hilbert space . We show herein, in particular, that there exists a “universal” fixed block-diagonal operator B on such that if ε > 0 is given and T is an arbitrary nonalgebraic operator on , then there exists a compact operator K of norm less than ε such that (i) Hlat(T) is isomorphic as a complete lattice to Hlat(B + K) and (ii) B + K is a quasidiagonal, C00, (BCP)-operator with spectrum and left essential spectrum the unit disc. In the last four sections of the paper, we investigate the possible structures of the hyperlattice of an arbitrary algebraic operator. Contrary to existing conjectures, Hlat(T) need not be generated by the ranges and kernels of the powers of T in the nilpotent case. In fact, this lattice can be infinite.
Types, paquets et changement de base : l’exemple de U(2, 1)(F0). I. Types simples maximaux et paquets singletons
Authors: Blasco Laure
Published: November 2009

Soit F0 un corps local non archimédien de caractéristique nulle et de caractéristique résiduelle impaire. J. Rogawski a montré l’existence du changement de base entre le groupe unitaire en trois variables U(2, 1)(F0), défini relativement à une extension quadratique F de F0, et le groupe linéaire GL(3, F). Par ailleurs, nous avons décrit les représentations supercuspidales irréductibles de U(2, 1)(F0) comme induites à partir d’un sous-groupe compact ouvert de U(2, 1)(F0), description analogue à celle des représentations admissibles irréductibles de GL(3, F) obtenue par C. Bushnell et P. Kutzko. A partir de ces descriptions, nous construisons explicitement le changement de base des représentations très cuspidales de U(2, 1)(F0).
A Characterization of the Quantum Cohomology Ring of G/B and Applications
Authors: Mare Augustin-Liviu
Published: November 2009

We observe that the small quantum product of the generalized flag manifold G/B is a product operation ★ on H*(G/B) ⊗ ℝ[q1, . . . , ql] uniquely determined by the facts that it is a deformation of the cup product on H*(G/B); it is commutative, associative, and graded with respect to deg(qi ) = 4; it satisfies a certain relation (of degree two); and the corresponding Dubrovin connection is flat. Previously, we proved that these properties alone imply the presentation of the ring (H*(G/B)⊗ℝ[q1, . . . , ql], ★) in terms of generators and relations. In this paper we use the above observations to give conceptually new proofs of other fundamental results of the quantum Schubert calculus for G/B: the quantumChevalley formula of D. Peterson (see also Fulton andWoodward) and the “quantization by standard monomials” formula of Fomin, Gelfand, and Postnikov for G = SL(n, ℂ). The main idea of the proofs is the same as in Amarzaya–Guest: from the quantum -module of G/B one can decode all information about the quantum cohomology of this space.
The Second Cohomology of Current Algebras of General Lie Algebras
Authors: Neeb Karl-Hermann , Wagemann Friedrich
Published: November 2009

Let A be a unital commutative associative algebra over a field of characteristic zero, a Lie algebra, and a vector space, considered as a trivial module of the Lie algebra . In this paper, we give a description of the cohomology space in terms of easily accessible data associated with A and . We also discuss the topological situation, where A and are locally convex algebras.
About the Defectivity of Certain Segre–Veronese Varieties
Authors: Abrescia Silvia
Published: November 2009

We study the regularity of the higher secant varieties of ℙ1 × ℙn, embedded with divisors of type (d, 2) and (d, 3). We produce, for the highest defective cases, a “determinantal” equation of the secant variety. As a corollary, we prove that the Veronese triple embedding of ℙn is not Grassmann defective.
An AF Algebra Associated with the Farey Tessellation
Authors: Boca Florin P.
Published: November 2009

We associate with the Farey tessellation of the upper half-plane an AF algebraencoding the “cutting sequences” that define vertical geodesics. The Effros–Shen AF algebras arise as quotients of. Using the path algebra model for AF algebras we construct, for eachτ∈ ( 0, ¼], projections (En) insuch thatEnEn±1En≤τ En.
Lifting n-Dimensional Galois Representations
Authors: Hamblen Spencer
Published: November 2009

We investigate the problem of deforming n-dimensional mod p Galois representations to characteristic zero. The existence of 2-dimensional deformations has been proven under certain conditions by allowing ramification at additional primes in order to annihilate a dual Selmer group. We use the same general methods to prove the existence of n-dimensional deformations.

We then examine under which conditions we may place restrictions on the shape of our deformations at p, with the goal of showing that under the correct conditions, the deformations may have locally geometric shape. We also use the existence of these deformations to prove the existence as Galois groups over ℚ of certain infinite subgroups of p-adic general linear groups.
Conjugate Reciprocal Polynomials with All Roots on the Unit Circle
Authors: Petersen Kathleen L. , Sinclair Christopher D.
Published: November 2009

We study the geometry, topology and Lebesgue measure of the set of monic conjugate reciprocal polynomials of fixed degree with all roots on the unit circle. The set of such polynomials of degree N is naturally associated to a subset of ℝN−1. We calculate the volume of this set, prove the set is homeomorphic to the N − 1 ball and that its isometry group is isomorphic to the dihedral group of order 2N.
Categorification of the Colored Jones Polynomial and Rasmussen Invariant of Links
Authors: Beliakova Anna , Wehrli Stephan
Published: November 2009

We define a family of formal Khovanov brackets of a colored link depending on two parameters. The isomorphismclasses of these brackets are invariants of framed colored links. The Bar-Natan functors applied to these brackets produce Khovanov and Lee homology theories categorifying the colored Jones polynomial. Further, we study conditions under which framed colored link cobordisms induce chain transformations between our formal brackets. We conjecture that for special choice of parameters, Khovanov and Lee homology theories of colored links are functorial (up to sign). Finally, we extend the Rasmussen invariant to links and give examples where this invariant is a stronger obstruction to sliceness than the multivariable Levine–Tristram signature.
Nonadjacent Radix-τ Expansions of Integers in Euclidean Imaginary Quadratic Number Fields
Authors: Blake Ian F. , Kumar Murty V. , Xu Guangwu
Published: November 2009

In his seminal papers, Koblitz proposed curves for cryptographic use. For fast operations on these curves, these papers also initiated a study of the radix-τ expansion of integers in the number fields and . The (window) nonadjacent form of τ -expansion of integers in was first investigated by Solinas. For integers in , the nonadjacent form and the window nonadjacent form of the τ -expansion were studied. These are used for efficient point multiplications on Koblitz curves. In this paper, we complete the picture by producing the (window) nonadjacent radix-τ expansions for integers in all Euclidean imaginary quadratic number fields.
Moving Frames for Lie Pseudo–Groups
Authors: Olver Peter J. , Pohjanpelto Juha
Published: November 2009

We propose a new, constructive theory of moving frames for Lie pseudo-group actions on submanifolds. Themoving frame provides an effectivemeans for determining complete systems of differential invariants and invariant differential forms, classifying their syzygies and recurrence relations, and solving equivalence and symmetry problems arising in a broad range of applications.
Onn-Dimensional Steinberg Symbols
Authors: Romo Fernando Pablos
Published: November 2009

The aimof this work is to provide a new approach for constructing n-dimensional Steinberg symbols on discrete valuation fields from (n+ 1)-cocycles and to study reciprocity laws on curves related to these symbols.
Hauteur asymptotique des points de Heegner
Authors: Ricotta Guillaume , Vidick Thomas
Published: November 2009

Geometric intuition suggests that the Néron–Tate height of Heegner points on a rational elliptic curveEshould be asymptotically governed by the degree of its modular parametrisation. In this paper, we show that this geometric intuition asymptotically holds on average over a subset of discriminants. We also study the asymptotic behaviour of traces of Heegner points on average over a subset of discriminants and find a difference according to the rank of the elliptic curve. By the Gross–Zagier formulae, such heights are related to the special value at the critical point for either the derivative of the Rankin–Selberg convolution ofEwith a certain weight one theta series attached to the principal ideal class of an imaginary quadratic field or the twistedL-function ofEby a quadratic Dirichlet character. Asymptotic formulae for the first moments associated with theseL-series andL-functions are proved, and experimental results are discussed. The appendix contains some conjectural applications of our results to the problem of the discretisation of odd quadratic twists of elliptic curves.
Microtexture and Grain Boundaries in Freestanding CVD Diamond Films: Growth and Twinning Mechanisms
Authors: Liu Tao , Raabe Dierk , Mao Weimin , Zaefferer Stefan
Published: November 2009

Three groups of free‐standing chemical vapor deposition (CVD) diamond films formed with variations in substrate temperature, methane concentration, and film thickness are analyzed using high‐resolution electron back‐scattering diffraction. Primarily {001}, {110}, and {111} fiber textures are observed. In addition, corresponding primary and higher order twinning components are found. As interfaces, high angle, low angle, primary twin, and secondary twin boundaries are observed. A growth and a twinning model are proposed based on the sp3 hybridization of the bond in the CH4 molecule that is used as the deposition medium.
Vertically Aligned Nanocomposite Thin Films as a Cathode/Electrolyte Interface Layer for Thin‐Film Solid Oxide Fuel Cells
Authors: Yoon Jongsik , Cho Sungmee , Kim Jung‐Hyun , Lee JoonHwan , Bi Zhenxing , Serquis Adriana , Zhang Xinghang , Manthiram Arumugam , Wang Haiyan
Published: November 2009

A thin layer of a vertically aligned nanocomposite (VAN) structure is deposited between the electrolyte, Ce0.9Gd0.1O1.95 (CGO), and the thin‐film cathode layer, La0.5Sr0.5CoO3 (LSCO), of a thin‐film solid‐oxide fuel cell (TFSOFC). The self‐assembled VAN nanostructure contains highly ordered alternating vertical columns of CGO and LSCO formed through a one‐step thin‐film deposition process that uses pulsed laser deposition. The VAN structure significantly improves the overall performance of the TFSOFC by increasing the interfacial area between the electrolyte and cathode. Low cathode polarization resistances of 9 × 10−4 and 2.39 Ω were measured for the cells with the VAN interlayer at 600 and 400 °C, respectively. Furthermore, anode‐supported single cells with LSCO/CGO VAN interlayer demonstrate maximum power densities of 329, 546, 718, and 812 mW cm−2 at 550, 600, 650, and 700 °C, respectively, with an open‐circuit voltage (OCV) of 1.13 V at 550 °C. The cells with the interlayer triple the overall power output at 650 °C compared to that achieved with the cells without an interlayer. The binary VAN interlayer could also act as a transition layer that improves adhesion and relieves both thermal stress and lattice strain between the cathode and the electrolyte.
Clinical impact of blood storage lesions
Authors: Zubair Abba C.
Published: November 2009

Recent reports suggest that transfusion of old red blood cell (RBC) units (>2 weeks) was associated with increased risks of postoperative complications and higher mortality rate caught public attention (Yap et al., Ann Thorac Surg 2008; 86:554–559 and Koch et al., 2008; 358:1229–1239). This rekindled the decades old discussion regarding the impact of RBC aging and storage lesions in patient care. The objectives of this review are to provide readers with an overview of the process of banking RBC that may have an impact on its quality, the reported clinical impact of storage lesions, the consequences of transfusing new RBC units only to the nation's blood supply and potential solutions that may improve the feasibility of blood banks to issue new blood units only. Am. J. Hematol., 2010. © 2009 Wiley‐Liss, Inc.
Psychiatric syndromes in individuals with chromosome 18 abnormalities
Authors: Zavala Juan , Ramirez Mercedes , Medina Rolando , Heard Patricia , Carter Erika , Crandall AnaLisa , Hale Daniel , Cody Jannine , Escamilla Michael
Published: November 2009

Chromosome 18 abnormalities are associated with a range of physical abnormalities such as short stature and hearing impairments. Psychiatric manifestations have also been observed. This study focuses on the presentations of psychiatric syndromes as they relate to specific chromosomal abnormalities of chromosome 18. Twenty‐five subjects (13 with an 18q deletion, 9 with 18p tetrasomy, and 3 with an 18p deletion), were interviewed by psychiatrists (blind to specific chromosomal abnormality) using the DIGS (subjects 18 and older) or KSADS‐PL (subjects under 18). A consensus best estimation diagnostic process was employed to determine psychiatric syndromes. Oligonucleotide Array Comparative Genomic Hybridization (Agilent Technologies) was utilized to define specific regions of chromosome 18 that were deleted or duplicated. These data were further analyzed to determine critical regions of the chromosome as they relate to phenotypic manifestations in these subjects. 58.3% of the chromosome 18q‐ deletion subjects had depressive symptoms, 58.3% had anxiety symptoms, 25% had manic symptoms, and 25% had psychotic symptoms. 66.6% of the chromosome 18p‐ deletion subjects had anxiety symptoms, and none had depressive, manic, or psychotic symptoms. Fifty percent of the chromosome 18p tetrasomy subjects had anxiety symptoms, 12.5% had psychotic symptoms, and 12.5% had a mood disorder. All three chromosomal disorders were associated with high anxiety rates. Psychotic, manic and depressive disorders were seen mostly in 18q‐ subjects and this may be helpful in narrowing regions for candidate genes for these psychiatric conditions. © 2009 Wiley‐Liss, Inc.
Enthesopathy formation in the humerus: Data from known age‐at‐death and known occupation skeletal collections
Authors: Cardoso F. Alves , Henderson C.Y.
Published: November 2009

Enthesopathies, in the guise of musculoskeletal skeletal stress markers (MSM), have been widely used to reconstruct activity levels in human skeletal populations. In general, studies have focused on their presence in the upper limb, which is used in the majority of daily activities. The aim of this study was to use some of the attachment sites on the humerus to explore the relationship between enthesopathy formation, activity, and the ageing process. The skeletal sample used in this study comprised male adult skeletons with known age‐at‐death and known occupations from the late‐19th and early‐20th century cemeteries in Portugal. The enthesopathies were recorded as either present or absent. Statistical analysis using Fishers exact tests and logistic regression was undertaken to determine whether associations could be found between specific activities or socioeconomic status (manual or nonmanual workers), and age and enthesopathy presence. Left and right sides were analyzed separately. Fisher's exact tests were used to determine the relationship between activity and enthesopathy, and they demonstrated no association between activity and enthesopathies (P > 0.01). The results of the logistic regression established that age was the single most significant factor in enthesopathy formation (P > 0.05). This study found that, in these samples, age‐at‐death, and therefore age‐related degeneration rather than degeneration caused by activities, was the primary cause of enthesopathy formation. Considering the difficulties of reliably ageing adult human skeletal remains, this is a major issue for studies of activity using enthesopathies. Am J Phys Anthropol, 2010. © 2009 Wiley‐Liss, Inc.
Synthesis and Antiproliferative Activitiy of Novel Diaryl Ureas Possessing a 4H‐Pyrido[1,2‐a]pyrimidin‐4‐one Group
Authors: Yao Peng , Zhai Xin , Liu Dong , Qi Bao Hui , Tan Hai Liang , Jin Yong Cai , Gong Ping
Published: November 2009

We herein disclose a series of novel diaryl urea derivatives possessing a 4H‐pyrido[1,2‐a]pyrimidin‐4‐one group as novel potent anticancer compounds. The structures were confirmed by IR, 1H‐NMR, and MS. All the compounds were screened for their antiprofilerative activity agaist the human breast cancer cell line (MDA‐MB‐231). The pharmacological results indicated that most of the compounds showed moderate activity. The best of this series is compound 4c (IC50 = 0.7 μmol/L), with a potency 3.6‐fold higher than Sorafenib (IC50 = 2.5 μmol/L), which was approved in 2005.
ChemInform Abstract: Structural and Vibrational Study of [Mo7O24]6‐ and [W7O24]6‐.
Authors: Courcot Blandine , Bridgeman Adam J.
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Energetic and Electronic Properties of X‐ (Si, Ge, Sn, Pb) Doped TiO2 from First‐Principles.
Authors: Long Run , Dai Ying , Meng Guo , Huang Baibiao
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Non‐thermal Reduction of Indium Oxide and Indium Tin Oxide by Mechanochemical Method.
Authors: Kano Junya , Kobayashi Eiko , Tongamp William , Miyagi Shoko , Saito Fumio
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Multinary Rare‐Earth Sulfides PrGdS3, NdGdS3, and SmEuGdS4, and Investigation of Their Thermoelectric Properties.
Authors: Ohta Michihiro , Kuzuya Toshihiro , Sasaki Hideto , Kawasaki Taku , Hirai Shinji
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Magnetic Properties of Ba2Mn2Si2O9: The First Example of S = 2 Spin Dimer with Spin‐Singlet Ground State.
Authors: He Zhangzhen , Wangbo Myung‐Hwan , Ueda Yutaka , Narumi Yasuo , Kindo Koichi , Taniyama Tomoyasu , Itoh Mitsuru , Cheng Wendan
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Novel Chemical Synthesis of Interlocked Cubes of Hausmannite Mn3O4 Thin Films for Supercapacitor Application.
Authors: Dubal D. P. , Dhawale D. S. , Salunkhe R. R. , Pawar S. M. , Fulari V. J. , Lokhande C. D.
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Hydrothermal Preparation and Characterization of Octadecahedron Fe3O4 Film.
Authors: Chen Jie , Huang Kelong , Liu Suqin
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Vicinal Dinitridoruthenium‐Substituted Polyoxometalates γ‐[XW10O38{RuN}2]6‐ (X: Si or Ge).
Authors: Proust Anna , et al. et al.
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Electroorganic Synthesis in Oil‐in‐Water (O/W) Nanoemulsion: TEMPO‐Mediated Electrooxidation of Amphiphilic Alcohols in Water.
Authors: Kuroboshi Manabu , Yoshida Tomonori , Oshitani Jun , Goto Kuniaki , Tanaka Hideo
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Carboranylphosphites as New Ligands for Rh‐Catalyzed Asymmetric Hydrogenation.
Authors: Lyubimov S. E. , Safronov A. S. , Tyutyunov A. A. , Kalinin V. N. , Said‐Galiev E. E. , Khokhlov A. R. , Petrovskii P. V. , Valetskii P. M. , Davankov V. A.
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: One‐Step Formation of Fused Tetracyclic Skeletons from Cyclohexene‐Diynes and Carbon Monoxide Through Rh(I)‐Catalyzed [2 + 2 + 2 + 1] Cycloaddition Reaction.
Authors: Kaloko Joseph J. , Teng Yu‐Han Gary , Ojima Iwao
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Heterocycles from Arylation Products of Unsaturated Compounds. Part 18. 5‐Arylfuran‐2‐carboxylic Acids and Their Application in the Synthesis of 1,2,4‐Thiadiazole, 1,3,4‐Oxadiazole, and [1,2,4]Triazolo[3,4‐b][1,3,4]thiadiazole Derivatives.
Authors: Gorak Yu. I. , Obushak N. D. , Matiichuk V. S. , Lytvyn R. Z.
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Construction of a Bicyclic β‐Benzyloxy and β‐Hydroxy Amide Library Through a Multicomponent Cyclization Reaction.
Authors: Zhang Li , Xiao Qing , Ma Chao , Xie Xiang‐Qun , Floreancig Paul E.
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Tandem Reactions of cis‐2‐Acyl‐1‐alkynyl‐1‐aryl Cyclopropanes Tuned by Gold(I) and Silver(I) Catalysts: Efficient Synthesis of Pyran‐Fused Indene Cores and 2,4,6‐Trisubstituted Phenols.
Authors: Zhang Xiao‐Ming , Tu Yong‐Qiang , Jiang Yi‐Jun , Zhang Yong‐Qiang , Fan Chun‐An , Zhang Fu‐Min
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Highly Enantioselective Synthesis of Heteroaromatic Alcohols Catalyzed by Chiral Diaminodiphosphine—Ruthenium(II) Complexes.
Authors: Shen Wei‐Yi , Li Yan‐Yun , Dong Zhen‐Rong , Gao Jing‐Xing
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Facile Method for Thiocyanation of Activated Arenes Using Iodic Acid in Combination with Ammonium Thiocyanate.
Authors: Mahajan Ulhas S. , Akamanchi Krishnacharya G.
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Binaphthyl‐Modified Quaternary Phosphonium Salts as Chiral Phase Transfer Catalysts: Application to Asymmetric Amination of β‐Keto Esters.
Authors: He Rongjun , Maruoka Keiji
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Transition‐Metal‐Free Oxidative Homocoupling of Aryl, Alkenyl, and Alkynyl Grignard Reagents with TEMPO.
Authors: Maji Modhu Sudan , Studer Armido
Published: November 2009

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.