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박대순,조정훈,장준복,이경섭 대한한방부인과학회 2004 大韓韓方婦人科學會誌 Vol.17 No.2
Objective: This study was conducted to investigate the effects of Hominis placenta (紫河車) on the reproductive competence in male mice. Materials and Method: We administered the decoction of Hominis placenta to 8-week-old and 18-week-old male mice once a day for 8 days. And we observed the count, the motility and the morphology of epididymal sperm from the male mice and the result of in vitro fertilization and embryonic development of oocytes. We examined the pregnancy rate and the delivery rate from the mice. Results: It was effective to be treated with Hominis placenta on the increase of the count and the motility of epididymal sperm in 8-week old mice but not effective on the change of the morphology of that. It was effective to be treated with Hominis placenta on the increase of the motility of epididymal sperm in 18-week old mice but not effective on the increase of the count and the change of the morphology of that. There was no signigicant effectiveness in the rate of in vitro fertilization and embryonic development of oocytes of the Hominis placenta treated group and that of control group in 8-week and 18-week old mice. There was no signigicant effectiveness in the rate of pregnancy and delivery of in vitro cultured blastocyst from mice of the Hominis placenta treated group and that of control group in 8-week and 18-week old mice. Conclusion: This study shows that Hominis placenta has no significant effects on the morphology of epididymal sperm from the male mice and in vitro fertilization and embryonic development of oocytes but has significant effects on the count and motility. We can suggest that Hominis placenta has an effect on the improvement of reproductive competence in male mice.
박대순,김정빈,이제원,김갑진,송기원,안재민 사단법인 항법시스템학회 2013 Journal of Positioning, Navigation, and Timing Vol.2 No.1
A signal system for improving the code acquisition complexity of Global Navigation Satellite System (GNSS) receiver is proposed and the receiving correlator scheme is presented accordingly. The proposed signal system is a hierarchical code type with a duplexing configuration which consists of the Zadoff-Chu (ZC) code having a good auto-correlation characteristic and the Pseudo Random Noise (PRN) code for distinguishing satellites. The receiving correlator has the scheme that consists of the primary correlator for the ZC code and the secondary correlator which uses the PRN code for the primary correlation results. The simulation results of code acquisition using the receiving correlator of the proposed signal system show that the proposed signal scheme improves the complexity of GNSS receiver and has the code acquisition performance comparable to the existing GNSS signal system using Coarse/Acquisition (C/A) code.