the aim of this study was to investigate the effect of morphology instruction through semantic mapping on vocabulary learning of iranian intermediate efl learners. to do so, 50 out of 70 students were se-lected from one english language institute by administrating a pet test. then, they were assigned into two groups randomly as experimental and control groups. a pretest (teacher made) was admin...

This paper proposes a ping-pong document clustering method using NMF and the linkage based refinement alternately, in order to improve the clustering result of NMF. The use of NMF in the ping-pong strategy can be expected effective for document clustering. However, NMF in the ping-pong strategy often worsens performance because NMF often fails to improve the clustering result given as the initi...

Yan-Ping Huang , Yong-Ping Zheng , Shu-Zhe Wang , Zhong-Ping Chen , 4 Qing-Hua Huang , and Yong-Hong He 4 5 Department of Health Technology and Informatics, Research Institute of Innovative 6 Products and Technologies, Hong Kong Polytechnic University, Hong Kong, China 7 Beckman Laser Institute, University of California Irvine, Irvine, California, USA, 8 Graduate School at Shenzhen, Tsinghua Un...

Department of Applied Chinese Languages and Literature, National Taiwan Normal University, 162, Sec. 1, Ho-Ping E. Rd., Taipei, Taiwan Department of Educational Psychology and Counseling, National Taiwan Normal University, 162, Sec. 1, Ho-Ping E. Rd., Taipei, Taiwan Graduate Institute of Information and Computer Education, National Taiwan Normal University, 162, Sec. 1, Ho-Ping E. Rd., Taipei, ...

Location-areas is a popular location management scheme in cellular networks. In the location areas scheme, a service area is partitioned into location areas, each consisting of contiguous cells. A mobile terminal updates its location whenever it moves into a cell that belongs to a new location area. However, no matter how the location areas are designed, the ping-pong location update effect exi...

The Diierential Algebraic Methods, a natural tool for the description and determination of the solution of diierential equations, have proven useful for the computation of aberrations of any desired order in any particle optical system. Besides conventional symplectic systems based on strongly or weakly focusing elements including fringe elds, they also readily allow the treatment of spin dynam...

The Security of the RSA implementation of ping-pong protocols is considered. It is shown that the obvious RSA properties, such as "multiplicativity", do not endanger the security of ping-pong protocols. Namely, if a ping-pong protocol is secure in general then its implementation using an "ideal RSA" is also secure.

The effect of noise on self-similar set is studied. The iteratie procedure used to generate the self-similar set is moidified by adding a stochastic variable to the diameter of generating sets at each iteration. The noise may causes the generating set to collapse to a point. Distribution functions are found describing the probability that any generating set collapse. The effect of chaotic distu...

We study different strategies for the truncation of computational domains in the simulation of eddy current probes of elongated axisymmetric tubes. For axial fictitious boundaries, an exact Dirichlet-to-Neumann (DtN) map is proposed and mathematically justified via the analysis of a nonselfadjoint spectral problem. We rely of results from the spectral theory of compact perturbations of selfadjo...