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A Dual-mode Pseudorandom number generator extension for ASIP design
Won Hur,Suk Han Lee,Yong-surk Lee 대한전자공학회 2008 ICEIC:International Conference on Electronics, Inf Vol.1 No.1
Random numbers are used in many sorts of applications. Some applications, like simple software simulation tests, communication protocol verifications, cryptography verification and so forth, need various levels of randomness with various process speeds. In this paper, we propose a fast pseudorandom generator module ideal for embedded systems. The generator module is implemented in hardware which can run in two modes, one of which can generate random numbers with higher randomness but which requires six cycles, the other providing its result within one cycle but with less randomness. An ASIP (Application Specific Instruction set Processor) was designed to implement the proposed pseudorandom generator instruction sets. We designed a processor based on the MIPS structure, by using LISA, and have run statistical tests passing the sequence of the Diehard test suite. The HDL models of the processor were generated using CoWare’s Processor Designer and synthesized into the Dong-bo 0.18㎛ CMOS cell library using the Synopsys Design compiler. With the proposed pseudorandom generator module, random number generation performance was 3.06 times faster, but the area increased only 2.004%.
Han Sang Yoo,InSooChoi,JongManKim,WonHur,유한상 대한수의학회 2002 Journal of Veterinary Science Vol.3 No.1
Swine respiratory diseases induce severe conomicloses in the swine industry worldwide. Severalmethods have ben developed and applied to controlthese diseases. However, there are stil problems ofdisease control in the swine industry. Recently, egyolk antibodies have ben found to offer several ad-vantages for disease control in animals and humans.In a previous tudy (24), antibodies to severaldeveloped. However, several problems remained,especialy in terms of reduced laying rates. Therefore,experimental vacines were reformulated with variousbacterial antigens of the swine respiratory diseases.After imunizing hens with the antigens, antibodyprofiles and other effects including laying rates wereinvestigated and compared to those of the previousstudy.Profiles of antibody titers were very similar withthose of the previous study. However, side fects,such as depression, weakness, reduction of layinglaying rates were increased in hens injected withcertain experimental vacines. In particular, layingrates of hens injected with vaccines against atrophicrhinitis were increased up to 84% by injecting avaccine composed of only the DNTs of B. bron-chiseptica and P. multocida D:4. Efficacies of thevaccines against swine pneumonic pasteurelosis andpleuropneumonia were very similar with those of theprevious study. These results uggest hat newvacines could be fective in the production of egyolk antibodies against the causative agents of swine*Adress: Department of Infectious Disease, Colege of VeterinaryMedicine and School of Agricultural Biotechnology, Seoul NationalUniversity, Suwon, 441-744 KoreaTel: +82-31-290-2737, Fax: +82-31-290-2737E.mail: yoohs@plaza.snu.ac.krrespiratory diseases.Key words ; IgY, Swine, Respiratory Diseases.