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Real-time horizon control of the cutting head is very important in longwall mining for maximizing production, minimizing wear, and reducing postimpurity processing cost. If the horizon control sensor has to be mounted directly onto the cutting drum, then it needs to withstand the impacts from mining debris as well as shock and vibration at an average level of 26 Gs and a peak level of 100-G force...
The domain name system (DNS) is integral to today's Internet. Name resolution for a domain is often dependent on servers well outside the control of the domain's owner. In this paper we propose a formal model for analyzing the name dependencies inherent in DNS, based on protocol specification and actual implementations. We derive metrics to quantify the extent to which domain names affect other domain...
This study investigates the effect of passivation opening design on electromigration reliability issue in flip-chip solder joints by using statistical analysis. Eutectic SnAg solder joints were used in this study with two different filling condition of polyimide (PI), ie with or without contact opening. The bump height is 50 ??m. The four point probe method was used to monitor the bump resistance...
Common sequential pattern mining algorithms handle static databases. Once the data change, the previous mining result will be incorrect, and we need to restart the entire mining process for the new updated sequence database. Previous approaches, within either Apriori-based or projection-based framework, mine patterns in a forward manner. Considering the incremental characteristics of sequence-merging,...
We introduced a new low-profile UWB monopole antenna to achieve overhorizon operation from low VHF frequencies up to 2 GHz. The curvature profile of proposed Inverted-Hat Antenna is logarithmically related to the distance from the feed point, and thus results in a frequency-independent performance. The eleven-ellipse IHA is the most frequency-independent design. Other outer surface growth profiles...
We presented a channel capacity evaluation of body-worn radio systems using a decomposition of the channel environment. Specifically, the human body interactions were treated separately from the propagation channel. Via this decomposition, we proceeded to evaluate body-worn antenna diversity. Full wave simulations of the environment were compared with the decomposition approach for validation. A systematic...
Weighted order statistic filters (WOSF) generate linearly separable Boolean functions. In some cases, 2 different WOSF may generate the same Boolean function. We thus can collect all of the WOSF together, which generate the same Boolean function. In this paper, we construct equivalent classes of WOSF, the BF equivalent class and the global equivalent class. Besides, we generalize three properties...
The simulation results show that larger contact opening may not benefit on relieving current crowding effect in the flip-chip solder joints. For the solder joints with a 10-mum thick Cu UBM, the diameter of the contact opening for the lowest current crowding effect is 60 mum. It means that using larger or smaller diameter will increase the current density in the solder bumps. In addition, the optima...
System-in-package (SiP) design methodology integrates multiple dies which come from different vendors into a package. It is more advantageous than printed circuit board (PCB) and system-on-a-chip (SoC) design methodologies from the aspects of development cost, power consumption, time-to-market, and miniaturization. Since these integrated dies can be manufactured and tested separately, the best-quality...
The financial operations of Taiwanese companies are becoming increasingly complex as a greater number of products are introduced into the market as a result of financial deregulation and reforms in Taiwan's financial markets. As financial statements are not able to fully reflect the actual state of companies' finances, many crises have occurred. Many investors are suffering from these crises, due...
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