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Joint assignment of frequency and polarization to minimize the chromatic number
구본홍,H. Birkan Yilmaz,채찬병,박성호,박휘성,함재현 한국통신학회 2017 ICT Express Vol.3 No.1
In this letter, we propose graph theory-based heuristics for jointly assigning frequency and antenna polarization in a cluster-based tactical communication environment (e.g., military communications). In addition to considering the frequency assignment problem (which is an NP-hard problem), we also consider the polarization assignment issue. A practical antenna and a 3D ray tracing-based simulator are exploited to measure the interference. We show that the suggested heuristics are nearly optimal in terms of chromatics and their low complexity makes them suitable for practical usage.
한약(韓藥) 복합제제(複合製劑)의 투여(投與)가 돼지의 성장(成長) 및 성장(成長)호르몬 분비(分泌)에 미치는 영향(影響)
구본홍,이태업,이병우,Koo Bon-Hong,Lee Tae-Eob,Lee Byung-Woo 대한한방소아과학회 1998 대한한방소아과학회지 Vol.12 No.1
The present study is designed that the herb medicines which are returned to kidney, pancreas and are known by efficacy in growth are supplied to pigs, thereafter the effects to growth and secretion of growth hormone in serum is investigated. For this purpose the 24 days old pigs, which are crossbreeding, castrated are used. The conclusions are that after 4 weeks' supply of herb medicinal compounds, pigs' weight gain has increased in low nutritional group with statistical meaning(p〈0.05). And one day's weight gain has increased with statistical meaning(p〈0.05) in all groups. Regarding food take, the second nutritional group has more significant increase than control group. Utilization rate of nutrition doesn't have any statistical meaning in all groups, but it has the tendency that as herb medicinal compounds are added, utilization rate of nutrition is increased. Increase of vertebra lengths and level of growth hormone in serum according to supply of herb medicinal compound don't have any statistical meaning because of small sample size, but 10 - 20 % increase of vertebra lengths and 10 - 30 % increase of level of growth hormone are observed.