Surface Trap for Cs atoms based on Evanescent-Wave Cooling
We demonstrate a gravito-optical surface trap for Cs atoms which exploits cooling in an evanescent light wave. About 10{sup 5} atoms were cooled down to 3{mu}K and formed a sample with a mean height of {approximately}20 {mu}m above the surface of a dielectric prism. The trap does not use a magnetic field and leads to very small atomic level perturbations. The excited-state population of the stored atoms is {approximately}1.5{times}10{sup {minus}6} and collisional losses are strongly suppressed. {copyright} {ital 1997} {ital The American Physical Society}
Cellular manufacturing system facilitates lean manufacturing in terms of production flexibility and control simplification. The paper presents a case study on a newly constructed cellular manufacturing system adopted by an electronic assembly factory as the back end process. The original rabbit chase is infeasible in this case because products handled are multi-types and multi-paths. Further, the cycle times are largely imbalance. The application of two proposed rabbit chase models was investigated through computer simulations enhanced with ANOVA and surface response methodology. The allocation of operators and the impact of changing lot size to the performances of the cell are investigated. For the findings, there are clear indications of the effects of the number of operators and the lot size for the performances of the system, regardless which rabbit chase model used.