The recruit and the selection is the foundation of all the Human Resource Management. Quality Human Resource can increase the total benefits of the enterprise. However, the risk exists in all the selections of the employees. The enterprise must bear some losses if they hire an unsuitable new employee. Therefore, rehire become one of the recruit channels. This channel is worthwhile for many enterprises to adopt. It is not only save recruit cost, but also the during time of new employee adapt company culture and training cost. The other hand, the enterprise can avoid the resignation of new employee because of adapt not very well. It avoid the risk and cost of recruit again. This research collected the relevant information about the ex-employees to be employed again in different industries. The total samples are 231 pieces from 27 enterprises. The research probes: (1) Compared with the 1st employment have rehire employees get higher salaries and position, and work for their company longer ? (2) Will the working experience in the period of leaving of the rehire have higher salaries and positions ? (3) Will the different reason of reemployee of the rehire have different salary and position ? The result shows that the rehire¡¦s salary and position are higher than their 1st employment, and work their company longer than their 1st employment. If the rehire working during their leaving period, their salary are better than their 1st employment. The longer the leaving period is, the higher the salary and position are on their rehire. If the company reemployee the rehire initatively, their salary and position will higher than 1st employment. Finally, this research makes a concise and brief explanation to the research limitation, the future research direction and the suggestion to enterprises. Key words: rehire of ex-employee, recruit channel, performance and salary.

Match problem is a very practical problem. For example, distribution system of united examination today is a kind of match problem. However, it is very inconvenient to hand over preference card now. Person must leave for designate place to hand over preference card. Besides, Internet is in widespread use now. A lot of work has accomplished and achieved conveniently by the use of Internet, such as Internet filing tax, electronic document and so on. After the work electronic-based, the work efficiency and personal convenience will be increased. Therefore, this study is constructing a system, which combines handing over preference card with Internet and considering that the security of Internet. This can simplify the procedure of handing over preference card.

This thesis is intended to provide several new bounding techniques for channel codes over quasi-static fading channels (QSFC). This type of channel has drawn more and more attention recently with the demanding need for higher capacity and more reliable wireless communication systems. Although there have been some published results on analyzing the performance of channel codes over QSFCs, most of them produced quite loose performance upper bounds. In this thesis, the general Gallager bounding approach which provides convergent upper bounds of coded systems over QSFCs is addressed first. It is shown that previous Gallager bounds employing trivial low SNR bounds tended to be quite loose. Then improved low instantaneous SNR bounds are derived for two classes of convolutional codes including turbo codes. Consequently, they are combined with the classical Union-Chernoff bound to produce new performance upper bounds for simple convolutional and turbo codes over single-input single-output (SISO) QSFCs. The new bound provides a much improved alternative to characterizing the performance of channel codes over QSFCs over the existing ones. Next the new bounding approach is extended to cases of serially concatenated space-time block codes, which show equivalence with SISO QSFCs. Tighter performance bounds are derived for this coding scheme for two specific cases: first a convolutional code, and later a turbo code. Finally, the more challenging cases of multiple-input multiple-output (MIMO) QSFCs are investigated. Several performance upper bounds are derived for the bit error probability of different cases of space-time trellis codes (STTC) over QSFCs using a new and tight low SNR bound. Also included in this work is an algorithm for computing the unusual information eigenvalue spectrum of STTCs.

This dissertation focuses on the recent supply chain initiatives, such as Vendor Managed Inventory (VMI) and Third-Party Logistics (3PL), enabling the coordination of supply chain entities; e.g., suppliers, buyers, and transporters. With these initiatives, substantial savings are realizable by carefully coordinating inventory, transportation, and pricing decisions. The impact is particularly tangible when the transporter's role and the transportation costs are explicitly incorporated into decision mechanisms that aim to coordinate the supply channel. Furthermore, expanding the perspective of channel coordination by introducing the transporter as an individual party in the channel provides tangible benefits for each member of the channel. Recognizing the need for further analytical research in the field of multi-echelon inventory and channel coordination, we developed and solved a class of integrated inventory and transportation models with explicit shipment consolidation considerations. Moreover, we examined transporter-buyer and supplier-transporter-buyer channels and solved centralized and decentralized models for these channels with the aim of investigating the impact of transporters on channel performance. In this dissertation, we also developed efficient coordination mechanisms between the transporter and the other parties in the channel.

¡@¡@In recent year, orthogonal frequency division multiplexing ¡]OFDM¡^ technology has been widely used in high-speed communication systems. One primary reason for the popularity of OFDM is its ability to provide good performance in multi-path channels than the other systems through the use of Guard interval(GI). By using the Guard interval, it can convert these inter-symbol interference (ISI) channels into ISI-free channels. But Guard interval without any information will caused inter-channel interference. In order to solve this problem, a guard interval using cyclic prefix (CP) is inserted to avoid inter-symbol interference from the adjacent symbols and inter-channel interference from other sub-channels. However, using long cyclic prefix will decrease the transmission rate, reduce the spectral efficiency, and increase the signal-to-noise power ratio¡]SNR¡^loss. If we choose a shorter one, the channel length may be longer than the cyclic prefix. The interference caused by insufficient cyclic prefix can seriously degrade the performance of OFDM systems. In order to solve this problem, a time domain equalizer¡]TEQ¡^is usually used in the receiver to shorten the channel length of OFDM transmission system, and therefore minimize the ISI and ICI. However, because of its high complexity, the optimum design of TEQ is hard to realize. ¡@¡@So we use an iterative channel estimation technique between time domain and frequency domain to mitigate the ISI and ICI which is caused by insufficient cyclic prefix. The iterative technique can remove ISI and hold the circular convolution property. By utilizing the iterative technique we can improve the channel estimation performance as the OFDM symbol used sufficient cyclic prefix. ¡@¡@In the computer simulations, we consider the worst case that the OFDM symbol is transmitted without guard interval. The results show that our proposed method can effectively suppress residual ISI. The comparison between our proposed method including both proposed channel estimation¡]PCE¡^and proposed data demodulation¡]PDD¡^, decision feedback channel estimation¡]DFCE¡^, avoid ISI preamble channel estimation¡]AISIP¡^, and residual ISI cancellation¡]RISIC¡^algorithm are made in this thesis. Finally, the performance improvement of the proposed algorithm under several channel conditions is considered and compared with other algorithms.

In a multiprocessor system-on-chip (MPSOC), parallel processors are utilized to enhance overall performance. However, the communication between processors and memory modules can affect overall performance significantly. We proposed a software design of communication performance estimation for system synthesis. We designed a hardware simulator of mesh communication architecture of MPSOC. We implemented the simulator of router nodes in SystemC language. An analytical communication performance estimation model can be trained with data measured from communication simulation. It can then be utilized for estimating inter-processor communication performance in an MPSOC.

This article studies the signal effects between different distribution channels. In this article, we assume the quality of goods only depends on production cost. The production cost is private information only belongs to manufacturers in direct channel. On the other hand, in indirect channel, production cost is information shared by manufactures and retailers, but the consumers will not know the production cost. Referring to consumer side, the demand of high quality goods is higher than the demand of low quality goods. All information is public to all players except the production cost. Therefore, the manufactures who provide high quality goods must signal their quality to consumers to get high sales volume. This research will verify the signaling effect in direct channel then explore the effect in indirect channel. After proving how the signaling effects work in both channels, we compare the effects among different channels. The comparison could help venders who face the adverse selection problems to make their channel strategies. The research results are as following: 1. No matter direct or indirect channels, the signaling effect get weak with the increase of consumer¡¦s price sensitivity, demand for high end goods and production cost of the goods. 2. The signaling effect in indirect channel is more effective than the effect in direct channel when consumers are with low price sensitivities. 3. The signaling effect in direct channel is more effective than the effect in indirect channel when the cost of goods in the same category is low. Keywords: signaling game; channel strategies; price strategies.

In 2000, the e-Commerce environment in Taiwan was still under development, and many Internet businesses were trapped in the crisis of dot.com bubble. One of the key factors is that the delivery of internet service and the fee charging methods had not been operated efficiently, due to causes of limited bandwidth, consumers¡¦ unfamiliarity with the internet services, and unsophisticated payment tools. However, the online game industry in Taiwan was not affected by the crisis, instead, related businesses emerged quickly. When facing the same e-commerce and network environment, how did the online game industry establish its channels and offer effective internet service and payment methods to help the consumers completing the product acquisition and transaction is a topic worth studying. Therefore, this research reviewed the market survey statistics and literatures concerning the internet development in Taiwan from 2000, and generalized the causes of the prosperity of online games in distribution channels, when e-commerce failed to develop. The research method was qualitative interview with the senior manager of G company, a representative company of the online game industry, and the senior supervisors of the channel strategy plans, in order to develop the channel distribution strategies of this case company. The key information obtained from interviews included: 1) understanding the channel distribution strategies of G company at that time; 2) establish the interconnected strategy activity system based on the channel strategy; 3) record the achievements of the channel strategies implemented by G company. Besides using qualitative interview to learn about the channel establishment strategies of G company, this research also probed into how the strategies could solve the problems of e-commerce at that time. Lastly, it proposed several suggestions to the innovative thinking and improvement of G company and online game industry, based on the development of the online game industry and future of e-commerce, in order to contribute to the channel establishment of the company and the industry. Keywords: online game, e-commerce, channel establishment strategies

In this paper, we propose a high-yield self-aligned process to form a silicon-on-insulator MOSFET with block oxide for 1T DRAM use. The new process can overcome the problem of the previous one [1], which cannot be used for a thin BOX devices. Based on the TCAD 10.0 simulation, we compared the conventional 1T-DRAM (PDSOI) with the partially depleted SOI with block oxide ¡]bPDSOI¡^ which used the new process presented in this thesis, We find that the device with block oxide embedded on body is not only obtain good short-channel effects immunity but also reduce leakage of the P-N junction between source/drain and the body and increase the gate controlability on the channel region. Moreover, it can decrease power consumption and raise the operation speed of the 1T-DRAM. Compare to the PDSOI DRAM to carry out 10 £gA programming window, the power consumption of the new 1T-DRAM is diminished 39% of write ¡§1¡¨ and 25% of write ¡§0¡¨. Furthermore, the energy consumption during memory operation is only 23% compared to that of the conventional PDSOI DRAM and it can short the operation time but achieve a long retention time.

A numerical simulation study for an interdigitated micro-channel PEM fuel cell is presented. Hydrogen gas is supplied to the anode and air is supplied to the cathode. The fuel cell outer surfaces are maintained at a constant temperature. The SIMPLEC algorithm is employed in a control volume numerical scheme. The outflow boundary conditions are specified to all transport equations except that an outlet pressure is specified to the momentum equation. Results are compared and show good agreement with the experimental data. The effects of the mass flow rate, the outlet pressure and the cell surface temperature on the cell performance are studied. The results can provide reference for fuel cell design.