On the Xiao conjecture for plane curves

Let $f: S\longrightarrow B$ be a non-trivial fibration from a complex projective smooth surface $S$ to a smooth curve $B$ of genus $b$. Let $c_f$ the Clifford index of the generic fibre $F$ of $f$. In [arXiv:1401.7502v4] it is proved that the relative irregularity of $f$, $q_f=h^{1,0}(S)-b$ is less than or equal to $g(F)-c_f$. In particular this proves the (modified) Xiao's conjecture: $q_f\le 1+g(F)/2$ for fibrations of general Clifford index. In this short note we assume that the generic fiber of $f$ is a plane curve of degree $d\ge 5$ and we prove that $q_f\le g(F)-c_f-1$. In particular we obtain the conjecture for families of quintic plane curves. This theorem is implied for the following result on infinitesimal deformations: let $F$ a smooth plane curve of degree $d\ge 5$ and let $\xi$ be an infinitesimal deformation of $F$ preserving the planarity of the curve. Then the rank of the cup-product map $\cdot \xi: H^0(F,\omega_F) \rightarrow H^1(F,O_F)$ is at least $d-3$. We also show that this bound is sharp.Comment: 8 pages. Some typos have been corrected. To appear in "Geometriae Dedicata

Branching fractions and CP asymmetries in B --> h+ h'-

Relative branching fractions of Bd,Bs --> h+ h'- decays (where h,h'= K or pi) and direct CP asymmetry in Bd --> K+ pi- have been measured with 180 pb-1 of data collected by the CDFII detector at the Tevatron collider. This includes the first BR measurement of a charmless Bs-->PP decay (Bs --> K+K-).Comment: To appear in the proceedings of 32nd International Conference on High-Energy Physics (ICHEP 04), Beijing, China, 16-22 Aug 2004. 5 pages, 2 figures, minor typo fi

A note on a theorem of Xiao Gang

In 1985 Xiao Gang proved that the bicanonical system of a complex surface $S$ of general type with $p_2(S)>2$ is not composed of a pencil [Bull. Soc. Math. France, 113 (1985), 23--51]. When in the end of the 80's it was finally proven that $| 2K_S|$ is base point free, whenever $p_g\geq 1$, the part of this theorem concerning surfaces with $p_g\geq 1$ became trivial. In this note a new proof of this theorem for surfaces with $p_g=0$ is presented.Comment: Latex, 4 page

H&M- Nanjing Mallexe: HRM Training 2010-08

This document is part of a digital collection provided by the Martin P. Catherwood Library, ILR School, Cornell University, pertaining to the effects of globalization on the workplace worldwide. Special emphasis is placed on labor rights, working conditions, labor market changes, and union organizing.FLA___Training_Report_for_Nanjing_Mallexe_2010_08.pdf: 190 downloads, before Oct. 1, 2020

Language Learning Strategies in Distance English Learning: A Study of Learners at Shantou Radio and Television University, China

Distance language learners require new kinds of skills, motivation and commitment to work effectively in a learning setting that is largely new and unfamiliar to them, and which is likely to have a direct impact on their development and use of learning strategies (Oxford & Burry Stock, 1995; White, 2004). This paper is based on a study of a group of Chinese students learning English at a distance at Shantou Radio and Television University, China, and investigates their use of language learning strategies. The study found that distance English learners in China are gradually shifting from dependence on teachers to a more autonomous approach to learning. In many cases they are beginning to deploy a variety of strategies to facilitate their learning, and at the same time taking more responsibility for their studies. This appears to challenge the traditional stereotype of the dependent, 'spoon-fed' Chinese language learner as portrayed in previous studies. The paper concludes that learner training should be integrated into the instructional design of the materials in order to enhance strategy awareness and emphasize the facilitative role of learning strategies in language study

H&M Jing Qing Rong Workers’ Participation 2nd Training 2010-11

This document is part of a digital collection provided by the Martin P. Catherwood Library, ILR School, Cornell University, pertaining to the effects of globalization on the workplace worldwide. Special emphasis is placed on labor rights, working conditions, labor market changes, and union organizing.FLA_H_M_JQR_Workers_Participation_2nd_Training_China.pdf: 184 downloads, before Oct. 1, 2020

H&M- Hop Lun Workers’ Participation 2nd Training China 2010-10

This document is part of a digital collection provided by the Martin P. Catherwood Library, ILR School, Cornell University, pertaining to the effects of globalization on the workplace worldwide. Special emphasis is placed on labor rights, working conditions, labor market changes, and union organizing.FLA_H_M___Hop_Lun_Workers_Participation_2nd_Training_China_2010_10.pdf: 118 downloads, before Oct. 1, 2020

Simultaneous strain and temperature measurement using a superstructure fiber Bragg grating

Author name used in this publication: Xiao-Ming Tao2000-2001 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe