Multidisk vertical allocation (MDVA) problems intend to find an allocation of relations to disks such that the expected query cost is minimized. Recently, Chang [European Journal of Operational Research 143 (2002) 210] modified Rotem et al.’s [IEEE Transactions on Knowledge and Data Engineering 5 (1993) 882] method for solving an MDVA problem using a smaller number of binary variables. Chang’s ...

"Chang'an Prevailing Features" is the inner spirit that integrates temperament of times, national spirit, ideology and aesthetic concept reflected in ancient Chang'an. This article takes as exposition content, uses "unit concept" history ideas, popular pattern cases Chang'an area research object, studies its existence operation methods...

This research deals with axial and oblique impact crash tests on simple and hybrid composite tubes. Axial and oblique impact tests have been generated on simple and hybrid composite tubes with one, two and three layers. A drop test rig was used to conduct the experiments. Furthermore, in order to gain more detailed knowledge about the crash process, finite element simulations of the experim...

Abstract For a period of several years the philosopher science Hasok Chang has promoted various inter-related views including pluralism, pragmatism, and an associated view natural kinds. He also argued for what he calls persistence everyday terms in scientific view. claims that like phlogiston were never truly abandoned but became transformed into different concepts remain useful. On other hand...

Simon Chang*, Kamhon Kan† and Xiaobo Zhang‡⇑ * Chang is a senior lecturer at the University of Western Australia, research fellow Institute Labor Economics (IZA) Global Organization (GLO). † Kan Economics, Academia Sinica. ‡ Zhang chair professor Peking International Food Policy Research (IFPRI). x.zhang{at}gsm.pku.edu.cn

This report highlights a series of joint theoretical and experimental collaborations which started over ten years ago in Taiwan. The recent topic program Synchrotron Radiation and Multiply-excited Atoms, sponsored by the National Center for Theoretical Sciences (NCTS) at Tsinghua University in Hsinchu and organized by K. T. Chung and C. S. Hsu, o®ers an excellent opportunity for many of us to w...