Phosphorescent organic light-emitting diodes (PhOLED) have attracted a lot of attention in these years.Blue PhOLED is especially important because of short lifetime and low optoelectronic performance as comparing to red and green PhOLEDs.Researches have shown that performance of OLED devices is highly rely on the deposition rate of organic materials ,which attest the morphology of organic layers. To study how the deposition rate of host material on the performance of blue PhOLED,mCP is chosen a host material for a blue dopant - FIrpic and deposition rate of mCP on the performance of blue PhOLED performance is studied. It was found that UV-Vis spectrum of mCP varied with different deposition rate.Additionally,an PL emission peak (400nm~500nm) appeared on the thermal evaporated mCP,which was possibly originated from the aggregation of mCP.Surface roughness of the evaporated mCP film became smaller as the deposition rate increased.A high performance (8.52 lm/W@1.2mA/cm2) is fabricated at a deposition rate at 3 A/s.

No description available.

Abstract This article uses the plant-level data of Taiwan manufacturing industry to study the determinants in explaining the timing of information and communication technologies (ICTs) adoption. This paper then investigates whether there exists any difference in determining the utilization of ICTs among high-tech industries and traditional industries. We find size variable has the most significant effect while there appears a different impact in different industries.

Abstract The Purchasing power parity ¡]PPP¡^ theory was originally developed by a Swidish economist, Gustav Cassel, in 1916. It is a method using the long-run equilibrium exchange rate of two currencies to measure the currencies' purchasing power. It is based on the law of one price, the idea that, in an efficient market, identical goods must have only one price internationally. This parity is a central building block of many theoretical and empirical models of exchange rate determination, since most are relied on PPP as the basis for long-run real exchange rates. While the literature on the PPP hypothesis is voluminous today and still growing, the doctrine has not found well. The validity of PPP can be examined by testing the stationary of real exchange rates. Most of the empirical evidences relied mainly on using linear structure to explore PPP in the past. By using traditional unit root test, the PPP is hard to hold in the long run. There is a growing consensus that previous empirical research reflects the poor power of the tests rather necessarily against PPP. Therefore, the use of more powerful tests is needed. Recently, an alternative point of view based on the presence of market frictions that impede commodity trade has arisen. The adjustment of real exchange rates is perhaps described more appropriately as a nonlinear process once market frictions are taken into account. There are several reasons that theoretically explain why the adjustment process of deviations from PPP is nonlinear, such as transactions and transportation costs and tariffs and non-tariff barriers to international trade. Therefore, the analysis of real exchange rate should be conducted under the nonlinear structure. This study uses the STAR methodology proposed by Granger & Teräsvirta (1993) and Teräsvirta (1994) to examine whether the deviation of PPP is a nonlinear dynamic adjustment among the following countries: Australia, Denmark, Italy, Japan, Luxembourg, Norway, Spain, Sweden and the United Kingdom. If the linear hypothesis was rejected, then to distinguish if the model of STAR is LSTAR or ESTAR. This study finds that the deviations from equilibrium exchange rates show strong evidence of nonlinear properties. The deviations of exchange rates for all countries can be explained by the LSTAR model. In conclusion, this study finds the real exchange rates exhibit the property of nonlinear mean reversion for most countries.

non

none

none

ii Abstract Tapeng Bay has distinct dry (October to May) and wet (June to September) seasons. The salinity was 33‰ in the dry season, but may as low as 21‰ during the wet season. The yearly average temperature, salinity and chlorophyll a of Tapeng Bay are 26.9 ¢J, 29.7 ‰ and 2.24 £gg/L respectively. Thirty-six species of copepods belonging 18 families and three orders plus 16 unidenitified species were found in the materials of this study. The average abundance of copepods was 5.8 ¡Ó8.4 x10 5 ind./100m 3 . The nine most dominant species were Acartia tsuensis , Paracalanidae (copepodites), Acartiidae (copepodites), Parvocalanus crassi rostris , Oithonidae (copepodites), Oithona dissimilis , n auplius, Acrocalanus indicus and Zausodes spp., contibuting to 81% of the total copepods. Majority of the dominant species exhibited clear seasonal changes in abundance, varying positively with temperature. Acartia tsuensis and Acartiidae were dominant species in station N in the wet season, but other dominant species had higher abundance in the dry season. Aurelia aurita (Cnidaria, Scyphozoa) which was dominant in the dry season, may play the role of a keystone species at stations S and C. Species composition was different among stations. Fish-pond species was dominant at station S, copepodite and nauplii, and neritic species at station N. The abundance of copepods may be influenced by tidal action. When inlet species abundance is higher than neritic species, total copepod abundance at high tide is lower than at low tide, but the trend is reverse for neritic species. The grazing impact of copepods on phytoplankton was 0.04 to 40.36 % per day.

In ATM (asynchronous transfer mode) networks, rate-based regulation-scheduling (R&S) mechanisms guarantee certain quality of service (QoS) with controlling the rate of a tagged connection serviced by the switches. The R&S mechanisms, which consider only the issues of one tagged connection itself but the situation of the scheduling queue, can behave hand-over well. However, there may be many connections hand over in identical condition and compete for the position in the scheduler queue. It makes the transmission to be distorted greatly from the hand-over. There is already a scheme, dynamic R&S, to smooth rate jitter with counting the hand-over of other connections. Dynamic R&S doesn't count the idle slots, which also make the interval between two consecutive tagged cells, and results in unnecessary misses. The new scheme proposed considers the system time and scheduler queue's length. It has less difference between transmission intervals and the premised one of a tagged connection, so that is better in rate-jitter control. This mechanism has O(1) time-complexity, so conforms to the demand of high-speed ATM networks.

The sonobuoy originated from military submarine detection¡Ait was also used to measure ocean acoustic signal by scientists¡Abut the continuous recording and transmitting design by early sonobuoy is not suitable for long-term or scheduled observations. In this research¡A¡§off the self¡¨ components were integrated to develop an autonomous sonobuoy¡Awhich can be used to measure shipping noise and marine life acoustic signal in coastal water. The electronic design is based on a PC motherboard¡Ait is currently configured with a maximum sampling rate of 44.1 kHz¡Aand a maximum storage capacity of 40 GB. The sound was collected by a plug and play hydrophone system¡Awhich is controlled by a program written by LabVIEW. In addition to the programmable data acquisition and low cost advantages¡Athe flexible design allows quick system expansion and adjustment¡Ait can also be configured to record from multiple transducers.