• 한국통신학회논문지
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• 제31권8C호
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• pp.763-770
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• 2006

본 논문에서는 소실 복호 기능을 갖는 가변형 Reed-Solomon(RS) 복호기가 수정 유클리드 알고리즘(modified Euclid's algorithm; MEA)을 기반으로 설계되었다. 복호기의 가변성은 원시 RS(255, 239, 8) 부호와는 다른 RS(124, 108, 8) 부호를 기반으로 단축과 펑처링을 통해 구현된다. 이렇게 하므로써 복호 시간을 단축시켰다. 복호기는 4단계 파이프라인 구조를 갖으며, 파이프라인의 각 단계는 서로 다른 클럭으로 동작할 수 있도록 설계하였다. 따라서 MEA 블록에 고속 클럭을 사용하므로써 복호기의 복잡도 및 복호 지연을 단축할 수 있으며, 버스트 및 연속 모드의 복호를 모두 지원한다. 설계된 복호기는 VHDL로 구현하고 FPGA에 합성하였으며, 3,717개의 로직 셀과 2,048 비트의 메모리가 사용되었다. 설계된 복호기는 최고 33MByte/sec의 데이터를 복호 할 수 있다.

• 한국토양비료학회지
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• 제21권1호
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• pp.11-14
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• 1988

옥수수 군락상(群落上)에서 측정(測定)한 순복사량(純輻射量)과 일사량(日射量), 온도(氣溫)의 관측치(觀測値)를 이용(利用)하여 일사량(日射量)과 순복사량(純輻射量)의 관계식을 구하고 복사수지식(輻射收支式)의 각항(各項)에 관(關)한 경험식(經驗式)을 이용(利用)하여 주간순복사량(晝間純輻射量)으르 추정(推定)하는 모델을 제안(題案)하였으며 결과(結果)를 요약(要約)하면 다음과 같다. 1. 일사량(日射量)과 주간순복사량(晝間純輻射量)의 관계식(關係式)은 $R_n(+)=0.6659$ $R_s$로 일사량(日射量)과 주간복사량(晝間純輻射量)의 비율(比率)이 66%이상(以上)이었다. 2. 일조율(日照率)이 35%이상(以上)인 흐린날의 일사량(日射量)과 주간순복사량(晝間純輻射量)의 관계식(關係式)은 $R_n(+)=0.7295{\cdot}R_s$로 흐린날에 옥수수 군락(群落)의 일사량(日射量)에 대(對)한 주간순복사량비율(晝間純輻射量比率)이 약간 큰 경향(傾向)이었다. 3. 복사수지식(輻射收支式)을 이용(利用)하여 일사량(日射量)과 기온(氣溫)으로 주간순복사량(晝間純輻射量)의 추정식(推定式) {$(0.9R_s-(352-227{\times}10^{-10}{\times}Ta^4) (1.11R_s/R_{so}-0.05)$}을 얻었다.

• Nuclear Engineering and Technology
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• 제51권4호
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• pp.1032-1036
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• 2019

When the equipment which is related to safety or important to power production is installed in nuclear power plant units (NPPs), verification of equipment Electromagnetic Susceptibility (EMS) must be performed. The low-frequency radiated magnetic field susceptibility (RS101) test is one of the EMS tests specified in U.S NRC (Nuclear Regulatory Commission) Regulatory Guide (RG) 1.180 revision 1. The RS101 test verifies the ability of equipment installed in close proximity to sources of large radiated magnetic fields to withstand them. However, RG 1.180 revision 1 allows for an exemption of the low-frequency radiated magnetic susceptibility (RS101) test if the safety-related equipment will not be installed in areas with strong sources of magnetic fields. There is no specific exemption criterion in RG 1.180 revision 1. EPRI TR-102323 revision 4 specifically provides a guide that the low-frequency radiated magnetic field susceptibility (RS101) test can be conservatively exempted for equipment installed at least 1 m away from the sources of large magnetic fields (>300 A/m). But there is no exemption criterion for equipment installed within 1 m of the sources of smaller magnetic fields (<300 A/m). Since some types of equipment radiating magnetic flux are often installed near safety related equipment in an electrical equipment room (EER) and main control room (MCR), the RS101 test exemption criterion needs to be reasonably defined for the cases of installation within 1 m. There is also insufficient data regarding the strength of magnetic fields that can be used in NPPs. In order to ensure confidence in the RS101 test exemption criterion, we measured the strength of low-frequency radiated magnetic fields by distance. This study is expected to provide an insight into the RS101 test exemption criterion that meets the RG 1.180 revision 1. It also provides a margin analysis that can be used to mitigate the influence of low-frequency radiated magnetic field sources in NPPs.

• 대한수학회논문집
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• 제33권2호
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• pp.571-580
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• 2018

The object of the present paper is to prove the non-existence of pseudo projective Ricci symmetric spacetimes $(PW\;RS)_4$ with different types of energy momentum tensor. We also discuss whether a fluid $(PW\;RS)_4$ spacetime with the basic vector field as the velocity vector field of the fluid can admit heat flux. Next we consider perfect fluid and dust fluid $(PW\;RS)_4$ spacetimes respectively. Finally we construct an example of a $(PW\;RS)_4$ spacetime.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 추계학술대회
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• pp.981-984
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• 2009

본 논문에서는 수정된 유클리드 알고리즘을 이용하여 RS(255,239) 복호기를 설계하였다. 설계된 복호기는 수정된 유클리드 알고리즘에서 차수를 계산하는 대신, 다항식의 차수를 state machine으로 표현한다. 수정된 유클리드 알고리즘을 이용하여 복잡도를 감소시킬 수 있고, 고속의 리드-솔로몬 복호기를 구현할 수 있다. Xilinx FPGA인 XC4VLX60을 타겟으로 ISE9.1i에서 합성한 결과 동작주파수가 77.4MHz이며, gate count가 39,759로 나타났다.

• 한국환경보건학회지
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• 제29권1호
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• pp.43-50
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• 2003

This study was performed to compare the effects of rice straw and towage sludge cake as bulking materials on temperature, pH, weight and volume reduction, porosity, C/N ratio, salinity, and conductivity in aerobic composting of food wastes. Volume ratios of food wastes to rice straw in reactor control, RS-1, RS-2, RS-3 and RS-4 were 4:0, 4:1, 4:2, 4:3 and 4:4, respectively. Weight ratios of food wastes to sewage sludge rake in reactor control, SL-1, SL-2, SL-3 and SL-4 were 4:0, 4:1, 4:2, 4:3 and 4:4, respectively. Reactors were operated for 24 days with 1 hour stirring by 1 rpm and 2 hours aeration per day. The values of pH of food waters, rice straw and sewage sludge cake were 4.39, 7.40 and 5.79, respectively. The lowering of the volume ratio of food wastes to rice straw resulted in the high reaction temperature and the fast weight and volume reduction rates. The lowering of the weight ratio of food wastes to sewage sludge cake resulted in the slow weight and volume reduction rates. C/N ratio in control was larger than that in rice straw containing reactors, and that in rice straw containing reactors was larger than that in sewage sludge cake containing reactors. Salinity and conductivity in reactors were condensed and increased by reaction days.

• Asian Pacific Journal of Cancer Prevention
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• 제15권1호
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• pp.85-91
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• 2014

Background: Genome-wide association studies (GWAS) have identified various genetic susceptibility loci for breast cancer based mainly on European-ancestry populations. Differing linkage disequilibrium patterns exist between European and Asian populations. Methods: Ten SNPs (rs2075555 in COL1A1, rs12652447 in FBXL17, rs10941679 in 5p12/MRPS30, rs11878583 in ZNF577, rs7166081 in SMAD3, rs16917302 in ZNF365, rs311499 in 20q13.3, rs1045485 in CASP8, rs12964873 in CDH1 and rs8170 in 19p13.1) were here genotyped in 1009 Chinese females (487 patients with breast cancer and 522 control subjects) using the Sequenom MassARRAY iPLEX platform. Association analysis based on unconditional logistic regression was carried out to determine the odds ratio (OR) and 95% confidence interval (95% CI) for each SNP. Stratification analyses were carried out based on the estrogen receptor (ER) and progesterone receptor (PR) status. Results: Among the 10 SNPs, rs10941679 showed significant association with breast cancer when differences between the case and control groups in this Han Chinese population were compared (30.09% GG, 45.4% GA and 23.7% AA; P = 0.012). Four SNPs (rs311499, rs1045485, rs12964873 and rs8170) showed no polymorphisms in our study. The remaining five SNPs showed no association with breast cancer in the present population. Immunohistochemical tests showed that rs2075555 was associated with ER status; the AA genotype showed greater association with ER negative than ER positive (OR = 0.54, 95% CI, 0.29-0.99; P = 0.046). AA of rs7166081 was also associated with ER status, but showed a greater association with ER positive than negative (OR = 1.59, 95% CI = 1.04-2.44; P = 0.031). However, no significant associations were found among the SNPs and PR status. Conclusion: In this study using a Han Chinese population, rs10941679 was the only SNP associated with breast cancer risk, indicating a difference between European and Chinese populations in susceptibility loci. Therefore, confirmation studies are necessary before utilization of these loci in Chinese.

• 한국가정과학회지
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• 제6권2호
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• pp.49-56
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• 2003

The effects of cooking methods on the total dietary fiber(TDF) and enzyme-resistant starch(RS) contents of nonwaxy and waxy milled and brown rices were investigated. The TDF contents of raw rices were 3.77% for nonwaxy brown, 3.41% for waxy brown, 1.37% for nonwaxy milled and 1.14% for waxy milled rices. The TDF contents were higher in brown rices than milled ones and slightly higher in nonwaxy than waxy ones. However, there were no significant differences among raw and cooked rices with. automatic electric cooker and automatic pressure cooker. The TDF contents of cooked rices did not show any increase, but that of waxy milled ones rather slightly decreased by cooking. The RS contents analysed were not significantly different between automatic electric cooking and automatic pressure cooking. The RS contents of cooked rices were 0.05∼0.06% for nonwaxy milled, 0.09∼0.12% for nonwaxy brown, 0.07∼0.08% for waxy milled, 0.11∼0.13% for waxy brown, which showed higher RS content in brown than milled ones, and in waxy than nonwaxy ones. The ratios of RS/TDF were 4.1∼4.2% for nonwaxy milled, 2.8% for nonwaxy brown, 7.5∼8.9% for waxy milled, 3.6∼3.7% for waxy brown, which showed that the higher the TDF contents, the less the contribution of RS to the TDF.

• Asian Pacific Journal of Cancer Prevention
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• 제17권8호
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• pp.4063-4070
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• 2016

Background: Cytochrome P450 2E1 (CYP2E1) and catechol-O-methyltransferase (COMT) genes may contribute to susceptibility to lung cancer because of their critical involvement in mechanisms of carcinogenesis. Materials and Methods: We evaluated the role of CYP2E1 rs2031920 and COMT rs4680 in a case-control study involving 462 lung cancer cases and 379 controls in Japanese. Logistic regression was used to assess adjusted odds ratios (OR) and 95% confidence intervals (CI). Multiplicative and additive interactions with cigarette smoking or alcohol use were also examined. Results: Neither CYP2E1 rs2031920 nor COMT rs4680 was associated with lung cancer risk overall. However, smokers with the CC genotype of CYP2E1 rs2031920 (OR = 3.57, 95% CI = 2.26 - 5.63) presented a higher risk of lung cancer than those with at least one T allele (OR = 2.91, 95% CI = 1.70 - 4.98) as compared to never-smokers with at least one T allele (reference). Subjects with excessive drinking and the CC genotype of CYP2E1 rs2031920 had a significantly higher risk (OR = 2.22, 95% CI =1.39 - 3.56) than appropriate drinkers with at least one T allele. A similar tendency was observed between COMT rs4680 and either smoking or drinking habits. There were no multiplicative or additive interactions between the polymorphisms and either smoking or alcohol use. Conclusions: Our findings indicate that CYP2E1 rs2031920 and COMT rs4680 are not major contributors to lung cancer risk in our Japanese population. Future studies on the genetics of lung cancer in Japanese and their environment interactions are required.

• 한국토양비료학회지
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• 제36권1호
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• pp.32-40
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• 2003

물관리와 유기물 시용이 상이한 벼논에서 메탄 배출을 측정하였다. 벼 식물체를 통한 메탄수송을 밝히려고 벼 생육기간중 분얼기, 감수분열기, 출수기, 수확기중 각 1일씩 주야로 2시간 간격으로 벼를 심은 chamber와 벼를 심지 않은 chamber에서 메탄가스 배출을 측정하였다. 상이한 생육기에서 벼 식물체를 통한 메탄 배출은 엽면적 지수, 건물중이 최대로 될 때까지는 증가하였지만 그 후로는 감소하였다. 6월 18-19일 (분얼기)에 벼 식물체가 매개한 메탄 배출은 NPK구, RSC구 (볏짚퇴비를 5월에 시응한 구). RS2구 (볏짚을 2월에 시용한 구)에서 각기 38.4%, 36.5%, 64.3%였었다. 7월 30일-31일 (감수분열기)에 벼 식물체가 매개한 메탄 배출은 NPK구, RSC구, RS2구에서 각기 70.4%, 74.3%, 74.4%였었다. 8월 20일-21일 (출수기)에 벼 식물체가 매개한 메탄 배출은 NPK구, RSC구, RS2구에서 각기 80.1%, 84.5%, 74.8%였었다. 9월 28일-29일 (수확기)에 벼 식물체가 매개한 메탄 배출은 NPK구, RSC구, RS2구에서 각기 69.9%, 65.9%, 64.4%였었다.