C~(q+)和O~(q+)与原子碰撞的电子俘获过程的理论研究

在ECPSSR理论的基础上,利用OBKN近似描述电子俘获过程,得到了包括电子俘获过程贡献的ECPSSR理论,编写了相应的计算程序。采用该程序计算了不同电荷态离子与多种靶原子碰撞的电子俘获截面和相应的X射线产生截面,将计算得到的包含电子俘获过程贡献的X射线产生截面与实验结果进行了比较。对于具有满K壳层的入射离子碰撞,X射线产生截面与入射离子电荷态基本无关;对于以直接电离为主导的碰撞过程,计算得到的X射线产生截面与实验数据符合得很好;对于全裸和单K空穴入射离子的碰撞,计算高估了X射线产生截面。

Les difficultés de l'arrangement statutaire de la L.c.Q. et l'utilisation croissante de celui de la L.c.s.a.

Le présent mémoire analyse les dispositions sur l'arrangement ou compromis avec actionnaires prévues aux articles 192 de la Loi canadienne sur les sociétés par actions et 49 de la Loi sur les compagnies du Québec. Dans un premier temps, l'étude de la genèse des dispositions sur l'arrangement dans les lois canadiennes fait ressortir que ces dispositions ont une origine commune et qu'elles partagent une même philosophie, caractérisée par une dualité entre la permissivité des transactions et la protection des épargnants. L'étude des fondements juridiques des mécanismes prévus dans la loi fédérale et provinciale permet ensuite de réaliser que, alors qu'à l'origine, la disposition québécoise était en quelque sorte le calque de la disposition fédérale, cette dernière a été modifiée postérieurement à la réforme de la loi fédérale, de sorte que plusieurs différences distinguent aujourd'hui ces deux lois au chapitre de l'arrangement. Dans un contexte où des démarches ont été entamées afin de réformer la loi provinciale, la question à laquelle ce mémoire tente de répondre peut se poser en ces termes: La « nouvelle disposition» d'arrangement adoptée par le législateur fédéral rencontre-t-elle mieux les objectifs de permissivité des transactions et de protection des épargnants que la disposition québécoise qui, pour sa part, est demeurée pratiquement inchangée depuis son adoption? L'étude parallèle de ces dispositions permet de constater que la «nouvelle disposition» d'arrangement de la L.c.s.a. semble davantage rencontrer ces objectifs.

"C Q";

Mode of access: Internet.

À la recherche d'une définition de la destination de l'immeuble en copropriété divise au Québec

Le droit de propriété, théoriquement absolu, est restreint dans le cadre de la copropriété divise étant donné le contexte individuel et collectif dans lequel il s’exerce. En fait, l’intérêt collectif peut lui imposer des restrictions, mais à certaines conditions. L’une d’entre elles, essentielle, est le respect de la destination de l’immeuble. Or, la notion de destination de l'immeuble ne fait l'objet d'aucune disposition législative permettant de la définir. Afin de préciser cette notion, deux conceptions ont été développées. La première est à l’effet qu’on doit tenir compte, dans la recherche de la destination de l'immeuble, de ses caractères et de sa situation. La deuxième prévoit plutôt qu'il faut distinguer ces trois éléments. Même si la première thèse est majoritairement admise en jurisprudence, nous croyons que les tribunaux interprètent trop largement cette notion, qui devrait être mieux circonscrite. Après une revue de la littérature et une analyse jurisprudentielle, nous développerons notre propre conception de la notion de destination, qui sera une voie mitoyenne entre les deux conceptions établies, et proposerons des améliorations quant à la rédaction de cette clause dans la déclaration de copropriété.

Q. Curtius Rufus ad codices parisinos recensitus cum varietate lectionum, supplementis Jo. Freinshemii et selectis Schmiederi variorumque commentariis quibus notas, excursus mappasque et indices addidit N. E. Lemaire.

Vol. 3 has title: Q. Curtius Rufus ad codices parisinos recensitus cum itinerario Alexandri, et Julio Valerio. Æsopi græci translatore quibus apud nos primum editis novos excursus, mappas, imagines, catalogos et indices ... addidit N. E. Lemaire ... "Index editionum [et versionum] Q. Curtii Rufi": v. 3, p. [375]-400.

[Q. Curtii Rufi, Historia Alexandri Magni /

J. Freinshemii Supplementorum in Q. Curtium liber primus [-secundus], p. 1-93.

Q. Curtii Rufi De rebus gestis Alexandri Magni historia

NC 0847652

Q. Curtius Rufus De rebus Alexandri Magni : una cum supplementis ... /

Mode of access: Internet.

Q. Horatii Flacci Opera omnia /

Mode of access: Internet.

Q. Curtii Rufi De rebus gestis Alexandri Magni regis Macedonum : libri superstites ad optimorum exemplarium fidem recensiti atque prooemio et indice rerum instructi a Frid. Schmieder.

Includes index.

Relationship between malnutrition and selected risk factors in two hospitals in Vietnam

Aim: The purpose of this study was to determine the percentage of patients assessed as malnourished using the Subjective Global Assessment in two hospitals in Ho Chi Minh City and Can Tho across multiple wards; and to investigate the association with factors including gender, age, days since admission, medical diagnosis and number of medications used. Methods: This cross-sectional study involved 205 inpatients from a hospital in Ho Chi Minh City and 78 inpatients and 89 outpatients from a hospital in Can Tho. Malnutrition status was assessed using Subjective Global Assessment. Ward, gender, age, medical diagnosis, time since admission and medication number were extracted from medical records. Results: 35.6% of inpatients and 9.0% of outpatients were malnourished. Multivariate analysis revealed factors predicting malnutrition status within inpatients (OR (95%CI)) were: age (OR = 1.03 (1.01-1.06)); cancer diagnosis (OR = 34.25 (3.16-370.89)); respiratory ward (11.49 (1.05-125.92)); or general medicine ward (20.34 (2.10-196.88)). Conclusions: Results indicate that malnutrition is a common problem in hospitals in Vietnam. Further research is needed to confirm this finding across a wider range of hospitals and to investigate the feasibility and efficacy of implementation of nutrition interventions in hospital settings.

Density-wave theory of dislocations in crystals

The density-wave theory of Ramakrishnan and Yussouff is extended to provide a scheme for describing dislocations and other topological defects in crystals. Quantitative calculations are presented for the order-parameter profiles, the atomic configuration, and the free energy of a screw dislocation with Burgers vector b=(a/2, a/2, a/2) in a bcc solid. These calculations are done using a simple parametrization of the direct correlation function and a gradient expansion. It is conventional to express the free energy of the dislocation in a crystal of size R as (λb2/4π)ln(αR/‖b‖), where λ is the shear elastic constant, and α is a measure of the core energy. Our results yield for Na the value α≃1.94a/(‖c1’’‖)1/2 (≃1.85) at the freezing temperature (371 K) and α≃2.48a/(‖c1’’‖)1/2 at 271 K, where c1’’ is the curvature of the first peak of the direct correlation function c(q). Detailed results for the density distribution in the dislocation, particularly the core region, are also presented. These show that the dislocation core has a columnar character. To our knowledge, this study represents the first calculation of dislocation structure, including the core, within the framework of an order-parameter theory and incorporating thermal effects.

Performance Evaluation of Distance-Hop Proportionality on Geometric Graph Models of Dense Sensor Networks

Wireless sensor networks can often be viewed in terms of a uniform deployment of a large number of nodes on a region in Euclidean space, e.g., the unit square. After deployment, the nodes self-organise into a mesh topology. In a dense, homogeneous deployment, a frequently used approximation is to take the hop distance between nodes to be proportional to the Euclidean distance between them. In this paper, we analyse the performance of this approximation. We show that nodes with a certain hop distance from a fixed anchor node lie within a certain annulus with probability approach- ing unity as the number of nodes n → ∞. We take a uniform, i.i.d. deployment of n nodes on a unit square, and consider the geometric graph on these nodes with radius r(n) = c q ln n n . We show that, for a given hop distance h of a node from a fixed anchor on the unit square,the Euclidean distance lies within [(1−ǫ)(h−1)r(n), hr(n)],for ǫ > 0, with probability approaching unity as n → ∞.This result shows that it is more likely to expect a node, with hop distance h from the anchor, to lie within this an- nulus centred at the anchor location, and of width roughly r(n), rather than close to a circle whose radius is exactly proportional to h. We show that if the radius r of the ge- ometric graph is fixed, the convergence of the probability is exponentially fast. Similar results hold for a randomised lattice deployment. We provide simulation results that il- lustrate the theory, and serve to show how large n needs to be for the asymptotics to be useful.

Quantum capacitance in bilayer graphene nanoribbon

We address a physically based analytical model of quantum capacitance (C-Q) in a bilayer graphene nanoribbon (BGN) under the application of an external longitudinal static bias. We demonstrate that as the gap (Delta) about the Dirac point increases, a phenomenological population inversion of the carriers in the two sets of subbands occurs. This results in a periodic and composite oscillatory behavior in the C-Q with the channel potential, which also decreases with increase in Delta. We also study the quantum size effects on the C-Q, which signatures heavy spatial oscillations due to the occurrence of van Hove singularities in the total density-of-states function of both the sets of subbands. All the mathematical results as derived in this paper converge to the corresponding well-known solution of graphene under certain limiting conditions and this compatibility is an indirect test of our theoretical formalism. (C) 2012 Elsevier By. All rights reserved.

3-MANIFOLD GROUPS, KÄHLER GROUPS AND COMPLEX SURFACES

Let G be a Kahler group admitting a short exact sequence 1 -> N -> G -> Q -> 1 where N is finitely generated. (i) Then Q cannot be non-nilpotent solvable. (ii) Suppose in addition that Q satisfies one of the following: (a) Q admits a discrete faithful non-elementary action on H-n for some n >= 2. (b) Q admits a discrete faithful non-elementary minimal action on a simplicial tree with more than two ends. (c) Q admits a (strong-stable) cut R such that the intersection of all conjugates of R is trivial. Then G is virtually a surface group. It follows that if Q is infinite, not virtually cyclic, and is the fundamental group of some closed 3-manifold, then Q contains as a finite index subgroup either a finite index subgroup of the three-dimensional Heisenberg group or the fundamental group of the Cartesian product of a closed oriented surface of positive genus and the circle. As a corollary, we obtain a new proof of a theorem of Dimca and Suciu in Which 3-manifold groups are Kahler groups? J. Eur. Math. Soc. 11 (2009) 521-528] by taking N to be the trivial group. If instead, G is the fundamental group of a compact complex surface, and N is finitely presented, then we show that Q must contain the fundamental group of a Seifert-fibered 3-manifold as a finite index subgroup, and G contains as a finite index subgroup the fundamental group of an elliptic fibration. We also give an example showing that the relation of quasi-isometry does not preserve Kahler groups. This gives a negative answer to a question of Gromov which asks whether Kahler groups can be characterized by their asymptotic geometry.