CKM Parameters and Rare B Decays

Measurements of the angles and sides of the unitarity triangle and of the rates of rare B meson decays are crucial for the precise determination of Standard Model parameters and are sensitive to the presence of new physics particles in the loop diagrams. In this paper the recent measurements performed in this area by Babar and Belle will be presented. The direct measurement of the angle alpha is for the first time as precise as the indirect determination. The precision of the V_ub determination has improved significantly with respect to previous measurement. New limits on B->tau nu decays are presented, as well as updated measurements on b->s radiative transitions and a new observation of b->d gamma transition made by Belle.Comment: Talk presented at the Lepton-Photon 2005 Symposium, June 30-July 5, Uppsala, Sweden. 14 pages, 13 figure

Trends in Detector R&D

Detectors are they eyes with which we observe the physics and explore new phenomena. The development of more performing detectors is essential for future physics discoveries and requires appropriate attention, funding, and recognition. In this paper the current trends in High Energy Physics detector research and development are reviewed. Since the topic is broader than the available space, figures are not included in the paper, but can be found in the references, whose main sources are the recent instrumentation conferences [1 – 6]

Speleogenesi e speleotemi di opale della Cueva Guacamaya, Auyan Tepui, Gran Sabana, Venezuela

La Cueva Guacamaya, esplorata nel marzo 2009 dall’elicotterista Raul Arias, è la più vasta cavità a sviluppo orizzontale conosciuta nel massiccio quarzitico dell’Auyan Tepui, nella Gran Sabana Venezuelana. A differenza delle altre cavità esplorate nell’area in precedenti esplorazioni dell’Associazione La Venta, questa grotta presenta morfologie peculiari, sviluppandosi lungo un sottile interstrato di ossidi e argille che interrompe la serie quarzitica della Formazione Mataui. La presenza di speleotemi di opale, di svariate forme e dimensioni notevoli, unite alla presenza di infiorescenze di gesso, per la prima volta segnalate in ambiente quarzitico in tale abbondanza, fanno di questa cavità un’interessante oggetto di studio sia per gli aspetti mineralogici, sia per un futuro progetto di datazione e geochimica degli speleotemi di opale.In March 2009 the Guacamaya cave was discovered on the Auyan Tepui by the helicopter pilot Raul Arias. It represents one of the longest caves explored on this table mountain, the only one known today with a complete horizontal development, comparable with those of the Brewer Cave System, in the Chimantha Tepui (the world largest sandstone cave). This cave presents typical morphologies, developed along an evident interbed of oxides, amorphous silica and clay interposed between hard quartzitic massive banks. In the walls around this layer, a variety of opal speleothems, of unusual dimensions and shapes, together with gypsum flowers and crusts have been documented. This preliminary study focuses on the general morphology of the cave conduits and on the mineralogical compositions and features of the opal-gypsum speleothems

Revealing the atomic structure of the buffer layer between SiC(0001) and epitaxial graphene

On the SiC(0001) surface (the silicon face of SiC), epitaxial graphene is obtained by sublimation of Si from the substrate. The graphene film is separated from the bulk by a carbon-rich interface layer (hereafter called the buffer layer) which in part covalently binds to the substrate. Its structural and electronic properties are currently under debate. In the present work we report scanning tunneling microscopy (STM) studies of the buffer layer and of quasi-free-standing monolayer graphene (QFMLG) that is obtained by decoupling the buffer layer from the SiC(0001) substrate by means of hydrogen intercalation. Atomic resolution STM images of the buffer layer reveal that, within the periodic structural corrugation of this interfacial layer, the arrangement of atoms is topologically identical to that of graphene. After hydrogen intercalation, we show that the resulting QFMLG is relieved from the periodic corrugation and presents no detectable defect sites

An unusual case of impacted biliary stone

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Research on Chinese Feminine Professional Career Development

职业生涯发展是人的人力资本获取与运用的最根本的途径，它的状况是人一生成功、幸福、快乐的重要标志之一。女性的职业生涯发展与男性或现有管理学中职业生涯发展研究的一般概述相比，有许多独特之处。职业女性如何发展，不仅关系到劳动力资源的数量，而且关系到劳动力资源的质量问题；不仅关系到社会的今天，更关系到社会的明天。要让中国从一个人口大国迈向人力资源强国，人力资源开发举足轻重，而女性人力资源开发是人力资源开发极为重要的、富有意义的内容。 本论文梳理职业生涯发展理论，探寻女性职业生涯发展特点，尝试运用多学科的理论和分析方法去认识中国女性职业发展中存在的问题，剖析影响因素，提出对策，为中国女性人力资本最大限...Human capital can be formatted and utilized through the most basic way of professional career development. The situation of the human capital is one of the important measures for a person of being successful, happy and joyful life. Comparing the feminine professional career development with that of masculine’s, or with the general professional career development research in the existing management...学位：管理学博士院系专业：管理学院企业管理系_企业管理(含财务管理、市场营销、人力资源管理)学号：B20001400