Colloidal metal oxide nanocrystals offer a unique combination of excellent low-temperature solution processability, rich and tuneable optoelectronic properties and intrinsic stability, which makes them an ideal class of materials as charge transporting layers in solution-processed light-emitting diodes and solar cells. Developing new material chemistry and custom-tailoring processing and proper...

Railroads in North America have recently come under pressure to avoid transporting certain high hazard materials through metropolitan areas. There are two principal reasonsfear of terrorist attack and concern about the risk of an accident-caused release. Consequently, a number of municipalities are considering legislation to block hazardous materials transportation through their communities, th...

In this article various pipes used for transporting of gas are introduced and pros and cons of each one are elucidated. The pipes are categorized in three different subgroups including metallic, polymeric and metallic-wire reinforced polymeric pipes. Metallic-wire reinforced polymeric pipes are nominated as the best option for usage in high pressure pipelines transporting natural gas. As a resu...

To the Editor: The severe acute respiratory syndrome (SARS) outbreak in Taiwan can be traced back to a Taiwanese businessman who returned from mainland China to Taiwan in March 2003 (1). In May 2003, several outer islands belonging to Taiwan reported SARS, and on June 2, 2003, Penghu Army Hospital reported a 40-year-old man with suspected SARS. The patient complained of shortness of breath and ...

Transporting video over the Internet is an important component of many multimedia applications. Video communication systems should provide the user with services that offers video at an acceptable quality. The current networking structure is loosely defined and heterogeneous, i.e. consisting of a range of interconnected networks with different technologies and capabilities. In order to effectiv...

In this paper we discuss how to select appropriate source and channel rate for transporting variable bit-rate (VBR) compressed video over QoS (quality of service)-assured channels. We first formulate it as an optimal control problem of discrete linear time-delay system. Then the discrete maximum principle is used to get the optimal control. Compared to traditional solutions, the proposed algori...

The demand for S A R plants is on the rise. this. First and foremost, the requirements for dealing with spent acids in an environmentally safe manner and the shift toward a refinery alkylation process to avoid the possible hazards from hydrogen fluoride. "tolling" or transporting spent acid long distances to independent regeneration plants for recycling is hazardous and may be cost prohibitive....