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- Yen-Ju Chen, Yu-Ting Lin, +8 authors Yi-Ming Arthur Chen
- BMC infectious diseases
- 2011

BACKGROUND
Men having sex with men (MSM) accounts for 33.6% of all reported cases of HIV-1 infection in Taiwan. The aim of this study was to investigate the epidemiology of HIV-1 infection among MSM in gay saunas in Taiwan.
METHODS
Patrons of 5 gay saunas were recruited for a weekly volunteer counseling and testing program from 2001 to 2005.… (More)

- S. K. Lai, Wen Pan Peng, Guo Feng Wang
- Physical review. E, Statistical, nonlinear, and…
- 2001

A realistic statistical-mechanics model is applied to describe the repulsive interaction between charged colloids. The latter, in combination with the long-range van der Waals attraction simulated under excess salt environment, gives rise to a total intercolloidal particle potential showing a clear second potential minimum. Differing from the usual… (More)

- S. K. Lai, Kun Lieh Wu
- Physical review. E, Statistical, nonlinear, and…
- 2002

We model the intercolloidal interaction by a hard-sphere Yukawa repulsion to which is added the long-range van der Waals attraction. In comparison with the Derjaguin-Landau-Verwey-Overbeek repulsion, the Yukawa repulsion explicitly incorporates the spatial correlations between colloids and small ions. As a result, the repulsive part can be expressed… (More)

- Lixin Zhan, Bart Piwowar, Wing-Ki Liu, Po Jen Hsu, S. K. Lai, Jeff Z. Y. Chen
- The Journal of chemical physics
- 2004

We introduce a new optimization algorithm that combines the basin-hopping method, which can be used to efficiently map out an energy landscape associated with minima, with the multicanonical Monte Carlo method, which encourages the system to move out of energy traps during the computation. As an example of implementing the algorithm for the global… (More)

- Boris A. Malomed, Edwin Ding, Kwok Wing Chow, S. K. Lai
- Physical review. E, Statistical, nonlinear, and…
- 2012

We introduce a discrete linear lossy system with an embedded "hot spot" (HS), i.e., a site carrying linear gain and complex cubic nonlinearity. The system can be used to model an array of optical or plasmonic waveguides, where selective excitation of particular cores is possible. Localized modes pinned to the HS are constructed in an implicit analytical… (More)

- Po Jen Hsu, S. K. Lai
- The Journal of chemical physics
- 2006

We report an optimization algorithm for studying bimetallic nanoclusters. The algorithm combines two state-of-the-art methods, the genetic algorithm and the basin hopping approach, widely employed in the literature for predicting structures of pure metallic and nonmetallic clusters. To critically test the present algorithm and its use in determining the… (More)

- Lixin Zhan, Jeff Z. Y. Chen, Wing-Ki Liu, S. K. Lai
- The Journal of chemical physics
- 2005

The multicanonical basin hopping (MUBH) method, which uses a multicanonical weight in the basin hopping (BH) Monte Carlo method, was found to be very efficient for global optimization of large-scale systems such as Lennard-Jones clusters containing more than 150 atoms. We have implemented an asynchronous parallel version of the MUBH method using the message… (More)

- Po Jen Hsu, J. S. Luo, S. K. Lai, J-F Wax, J-L Bretonnet
- The Journal of chemical physics
- 2008

The isothermal Brownian-type molecular dynamics simulation has been applied to study the melting behavior of bimetallic clusters. It was found that the specific heat and Lindermann-like parameter customarily used in bulk system to describe solid-liquid transition show incongruity in the predicted melting temperature T(melt). The underlying mechanisms that… (More)

- W-H Li, Sing-yung Wu, +4 authors Hung-Yu David Yang
- Physical review letters
- 2002

A fine Au powder, with a mean particle diameter of 4 nm, has been successfully fabricated. The crystalline structure of the 4 nm Au nanoparticles remains in fcc symmetry. No structural changes were found between 15 and 450 K. A crossover from a positive thermal expansion at low temperatures to a negative thermal expansion at high temperatures was observed… (More)

- Tiem Leong Yoon, Tanya L. Lim, Taek Ki Min, Seung Ho Hung, Noël Jakse, S. K. Lai
- The Journal of chemical physics
- 2013

We grew graphene epitaxially on 6H-SiC(0001) substrate by the simulated annealing method. The mechanisms that govern the growth process were investigated by testing two empirical potentials, namely, the widely used Tersoff potential [J. Tersoff, Phys. Rev. B 39, 5566 (1989)] and its more refined version published years later by Erhart and Albe [Phys. Rev. B… (More)