Phases of QCD, Polyakov Loop and Quasiparticles

QCD thermodynamics is studied using a model which combines Polyakov loop dynamics with spontaneous chiral symmetry breaking and its restoration (the PNJL model). The input is fixed entirely by pure-gauge lattice QCD results and by pion properties in vacuum. Successful comparisons with results from thermal lattice QCD are achieved, including extrapolations to finite quark chemical potential. The phase diagram and selected susceptibilities for two quark flavors are investigated with inclusion of diquark degrees of freedom.Comment: 9 pages, 8 figures. To appear in Proceedings YKIS2006, Prog. Theor. Phys. Suppl. (Kyoto

Contribution à l'étude du comportement mécanique des carcasses textiles de bandes transporteuses : optimisation de la jonction

The conveyor belt is used as a material and object transportation tool in a lot of industries such as underground mines, quarries, food industries, agribusinesses or supermarkets. The studied subject is the underground mine conveyor belt, because of their transportation and use difficult conditions.Indeed, the conveyor belt must be cut to be dispatched using belt reeling and joined afterwards in the underground mine forming an endless belt. However, the junction is the weakest part of the conveyor belt due to the 50% belt weakening. The aim of this study is to propose a new junction solution. After analysing the underground belt mechanical and chemical use conditions, the different junction types have been analysed. A junction advantage and inconvenience comparison has been presented. Then, the junction mechanical behaviour has been studied using an original mechanical setup reproducing the mechanical junction. The different parameter influence has been evaluated using a new adimensional indicator called junction tensile strength efficiency. In the last part, a new junction solution made by a sewn has been explored. The sewn junction tensile efficiency has been tested on a tensile strength machine and its fatigue efficiency has been verified through dynamic tests. New outlines in the conveyor belt joining are open as a result of the sewn junction solution development.La bande transporteuse est utilisée dans l’industrie pour acheminer de la matière ou des objets dans de multiples domaines d’applications tels que les mines souterraines ou aériennes, les carrières, l’industrie alimentaire, l’industrie agricole ou les supermarchés. Ses composants lui permettent de travailler dans des conditions extrêmement difficiles. L’intérêt est porté sur les bandes transporteuses de mines de fond dont les contraintes de fonctionnement et d’acheminement sont particulières. En effet, la bande est acheminée sur rouleaux et jonctionnée sur le site de l’utilisateur pour former une bande sans fin. La jonction est le point faible de la bande transporteuse car sa résistance représente 50% seulement de la force de rupture nominale de la bande. L’objet de cette étude est de proposer une nouvelle solution de jonctionnement.Après avoir analysé les différentes contraintes mécaniques et chimiques auxquelles la bande transporteuse est soumise, une étude comparative sur les différents types de jonctions a été menée.Il y a les jonctions chimiques et les jonctions mécaniques. Chacune a des avantages et des inconvénients en termes de coût ou de longévité, qui ont été présentés. Dans un troisième temps, une étude a été menée sur la compréhension du comportement de rupture de la jonction mécanique. L’étude sur la jonction a été réalisée à l’aide d’un montage expérimental conçu spécifiquement. L’influence des paramètres de la jonction a pu être évaluée grâce à un nouvel indicateur adimensionnel représentant l’efficacité de la jonction par rapport à la bande normale (Junction Tensile Strength Efficiency : JTSE). Dans un quatrième temps, une étude a été faite sur un système de jonction innovant par couture. La jonction réalisée a été testée sur un banc de traction pour en vérifier l’efficacité, puis des essais ont été effectués sur un banc dynamique pour en étudier la fatigue. La jonction cousue est une innovation qui permet de dégager de nouvelles perspectives dans le jonctionnement des bandes transporteuses

Impact of a retarded child on his family and vice versa

Considering what has been said, it can be clearly understood how important the family is to the retarded child\u27s total development. In this paper the writer has attempted to review the research which has been done concerning the impact of a retarded child on his family and vice versa. Many studies have been done on family adjustment problems, reactions of parents, family acceptance, effect on the family unit, and on counseling the parents of the retarded. However, there is a disturbing lack of empirical underpinnings for past and present practices in the management of the family of the retarded. One reason for this is the newness of the field as there was little family management in mental retardation before the mid 1940\u27s. With change in family management of the retarded, the future will probably see changes in the impact which a retarded child will make on his family. In view of these statements concerning the family problem which retardation presents, the writer has endeavored in her findings to determine its implications for the future

A performer\u27s guide to the songs for soprano by the Austro-American composer Eric Zeisl (1905-1959)

This written document presents an introduction to the soprano songs by the Austro-American composer Eric Zeisl. Songs chosen comprise published songs (Der Schäfer, Die Fünf Hühnerchen, Vergiss Mein Nicht, Vor Meinem Fenster) as well as unpublished songs (Der Briefmark, Der Tag Erwacht, Immer Leiser Wird Mein Schlummer, Kommst Du Nicht Herein, Reiterliedchen). The thesis begins with a brief biographical outline of the composer and a discussion of his song style and his musical influences. Subsequent chapters include a discussion of the poets used in the chosen songs, as well as an analysis of these songs. Appendices provide translations, IPA transcriptions, a complete song list of Zeisl’s soprano songs with vocal ranges, and a discography