서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1996)

김재홍,황동규,전재홍,김윤석,김중환,김용준,이창균,임동진,김현수,조창근,김경문,박상훈,전우형,김희성,이호정,차명수,김갑형,김형석,김석우,황지환,박병순,권오상,이민수,송기훈,성소영,이인섭,부태성 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.2

Background : In recent years, gonorrhea has been panedemic and remains one of the most commom STDs in the world, especially in developing countries. Objective & Methods: For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results: In 1996, 139 strains of N. gonorrhoeae were isolated, among which 53(39.0%) were PPNG. Conclusion: Our results suggests that after a peak of 74.3% in 1993, the prevalence of PPNG in Seoul is gradually declining.

敗醬草가 癌細胞柱에 미치는 影響

申大澈,權貞南,金瑩均,韓宗鉉,김재석,김재섭 동의대학교 한의학연구소 1997 동의한의연구 Vol.1 No.-

The purpose of this study was to investigate effect of water extract of Patriniae Herba on the poliferation of human cancer cell-lines. The effects of Patriniae Herba on the poliferation of A43l, HeLa, MOLT-4, K562 cells, Balb/c 3T3 cells, mouse thymocytes, splenocytes and human lymphocytes were estimated by MTT colorimetric assay, The results were as follows; 1. Patriniae Herbs did not effect A43l, HeLa, MOLT-4, K562 cells. 2. The cytotoxicity of mitomycin C on MOLT-4 cells was increased by the combination of Patriniae Herba. 3. Patriniae Herba inhibited the proliferation of Balb/c 3T3 cells. 4. Patriniae Herba stimulated the proliferation of thymocytes. 5. Patriniae Herba stimulated the proliferation of splenocytes. 6. Patriniae Herba stimulated the proliferation of human lymphocytes.

벼에 대한 돈분뇨 혐기성 소화액비의 시용기준 연구

임동규,박우균,권순익,남재작,박백균,김승환 한국환경농학회 2002 한국환경농학회지 Vol.21 No.4

가축분뇨물 혐기소화하여 메탄가스를 생산하고 난 다음 혐기성 소화액비를 비료자원으로 활용하기 위하여 농가포장에서 액비의 시용기준을 구명하였다. 벼 생육상황은 분얼기 및 출수기에 액비 70%+화학비료 30% 및 액비 100%구의 경수만 타 처리구보다 약간 많았다. 시기별 식물체 중 절진소함량은 표준시비구가 생육초기에 기비 및 분얼비의 영향으로 타 처리구보다 높았다. 벼 수량은 액비 70%+화학비료 30% 및 액비 100%구가 표주시비구보다 약간 증수되었으나, 액비 50%+화학비료 50%구는 표준시비구보다 약간 낮았다. 수확기 질소흡수량, 시비질소 효율 및 시비질소 이용율은 수량이 많았던 액비 70%+화학비료 30% 및 액비 100%구에서 높았다. 시기별 토양 중 NH_4-N함량 및 NO_3-N함량 변화는 표준시비구 및 액비 50%+화학비료 50%구가 생육초기에만 타 처리구보다 약간 높았다. 시기별 관개수 중 NH_4-N함량 변화는 분얼비의 영향으로 급격히 증가하였다가 급격히 감소하였는데 증가한 시기에는 표준시비구 > 액비 50%+화학비료 50%구가 타처리구보다 높았으나, NO_3-N함량은 처리 간 차이가 없었다. 시기별 침투수 중 NH_4-N함량 및 NO_3-N함량 변화는 무비구가 생육초기에 타 처리구보다 약간 높았는데, 이것은 벼 생육불량에 의한 양분흡수가 적어지면서 상대적으로 지중으로 침투가 많았기 때문인 것으로 생각다. 따라서 혐기성 소화액비의 적정 시용기준은 표준시비량의 질소성분 70%을 액비로서 전량기비로 사용하고, 나머지 30% 질소성분을 화학비료로 분얼비 10% · 수비 20% 시용하는 것이 효과적이었다. This study was conducted to evaluate the effect of the proper application level of anaerobic digestion waste water on rice. The waste water was from methane fermentation of pig manure to use as a liquid manure. The mixture treatment of 70% liquid manure and 30% chemical fertilizer (LM 70%+CF 30%) and 100% liquid manure (LM 100%) treatment were higher number of tiller than other treatments at the both tittering and heading stages of rice. The yields of LM 70%+CF 30% and LM 100% treatments were a little higher than that of NPK treatment, but the mixture treatment of 50% liquid manure and 50% chemical fertilizer (LM 50%+CF 50%) was a little lower yield than NPK treatment. The periodic changes of the NH_4-N and NO_3-N contents of the NPK and the LM 50%+CF 50% treatments in paddy soil were a little higher than those of other treatments at the early stage of rice. The NHL_4-N contents of NPK and the LM 50%+CF 50% treatments in irrigation water quality were higher than those of other treatments, however there was no difference in NO_3-N content among the treatments. The NH_4-N and NO_3-N contents of non fertilizer treatment in infiltration water quality were leached a little higher than those of other treatments. It may be due to poor growth of rice following to reduce the nutrient uptake by rice and to increase relatively the nutrient leaching to the ground water. The proper application level of anaerobic digestion waste water as a liquid manure could be suggested to apply LM 70%+CF 30%. All treatments were the same amount of nitrogen content for the standard application amount on rice.

벼에 대한 돈분뇨 혐기성 소화액비의 사용적량 구명

임동규,박우균,권순익,남재작,이상범 한국환경농학회 2002 한국환경농학회지 Vol.21 No.4

가축분뇨를 혐기성소화하여 메탄가스를 생산하고 난 다음 혐기성 소화액비를 비료자원으로 활용하기 위하여 농가포장에서 액비의 시용적량을 구명하였다. 벼 생육상황은 액비 100%+화학비료구가 전 시기를 통해 가장 양호하였으며, 그 다음으로 표준시비구가 분얼기에만 양호하였으나 그 이후에는 표준시비구·액비 100%구 및 액비 150%구 간에는 서로 차이가 없었다. 시기별 식물체중 전질소함량은 분얼기 및 출수기에는 추비의 영향으로 표준시비구가, 유수형성기에는 액비 100%+화학비료구가 높았다. 벼 수량은 액비 100% 및 150%구들이 표준시비구와 비슷하거나 약간 증수되었으며, 액비 100%+화학비료구는 고중의 증가 및 도복으로 인하여 표준 시비구보다 수량이 오히려 약간 낮았다. 수확기 질소흡수량은 표준시비구가 가장 높았고 ,시비질소 효율은 액비 100%구에서, 시비질소 이용율은 액비 100%+화학비료구에서 높았다. 시기별 토양중 NH₄-N 및 NO₃-N함량 변화는 액비 100%+화학 비료구가 타 처리구보다 높았다. 시기별 관개수 중 NH₄-N 및 NO₃-N함량 변화는 분얼비의 영향으로 급격히 증가하였다가 급격히 감소하였는데, 증가한 시기에는 표준시비구 및 액비 100%+화학비료구가 가장 높았다. 시기별 침투수 중 NH₄-N함량 변화는 액비 150%구들에서 많이 용탈되었구 NO₃-N 함량은 액비에 화학비료를 추비한 구들에서 많이 용탈되었다. 혐기성 소화액비는 액비 중의 질소성분을 분석하여서 표준시비량의 질소성분에 맞추어 시용하여야 한다. This study was carried out to evaluate the proper application amount of anaerobic digestion waste water and the environmental influence on rice. The waste water collected after methane fermentation process of pig manure was used as a liquid manure. Liquid manure 100%+chemical fertilizer 30%(LM 100%+CF 30%) treatment was the most favorable at all growth stages of rice. The LM 100%+CF 30% treatment was applied to 100% amount of liquid manure which was correspond to the same amount of nitrogen for the standard application amount on rice, with adding 30% amount of chemical fertilizer(urea) at tillering stage. The yields of rice in the treatments of 100%(LM 100%) and 150% amount(LM 150%) of liquid manure were similar or a little higher than NPK treatment, but LM 100%+CF 30% treatment was less than the NPK treatment due to the increase of straw weight and plant lodging. In periodic changes of the NH_4-N and NO_3-N contents, the LM 70%+CF 30% treatment in paddy soil was the highest in all treatments. The NPK and the LM 100% treatments in irrigation water quality were higher than other treatments. In infiltration water quality, M44-N content was leached out much in the LM 150% treatment and NO_3-N content was in the LM 100%+CF 30% treatment. The proper application amount of anaerobic digestion waste water as a liquid manure must be to analyse the nitrogen content of the waste water and to apply the same amount of nitrogen for the standard application amount on rice.

Improved Orthogonal Code Hopping Multiplexing Using Both Division and Hopping

Kwon, Jae-Kyun,Park, Su-Won,Sung, Dan-Keun The Korea Institute of Information and Commucation 2008 韓國通信學會論文誌 Vol.33 No.3A

We previously proposed an Orthogonal Code Hopping Multiplexing (OCHM) scheme for statistical multiplexing on a synchronous downlink. OCHM enables a large number of users to share a limited number of code channels through statistical multiplexing. We here improve the performance of OCHM by prioritizing encoded symbols according to their importance using both the conventional code division and the previously proposed code hopping multiplexing schemes. Prioritization is useful for channel coding schemes with different levels of importance for encoded symbols such as turbo-codes. Scheme performance is evaluated by simulation in terms of the required Eb/N0 for a 1% block error rate.

Improved Orthogonal Code Hopping Multiplexing Using Both Division and Hopping

Jae Kyun Kwon,Suwon Park,Dan Keun Sung 한국통신학회 2008 韓國通信學會論文誌 Vol.33 No.3A

We previously proposed an Orthogonal Code Hopping Multiplexing (OCHM) scheme for statistical multiplexing on a synchronous downlink. OCHM enables a large number of users to share a limited number of code channels through statistical multiplexing. We here improve the performance of OCHM by prioritizing encoded symbols according to their importance using both the conventional code division and the previously proposed code hopping multiplexing schemes. Prioritization is useful for channel coding schemes with different levels of importance for encoded symbols such as turbo-codes. Scheme performance is evaluated by simulation in terms of the required Eb/N0 for a 1% block error rate.

Factors Associated with Clinical Outcomes of Palliative Stenting for Malignant Colonic Obstruction

( Sang-jae Kwon ),( Jiyoung Yoon ),( Eun Hye Oh ),( Jeongseok Kim ),( Nam Seok Ham ),( Sung Wook Hwang ),( Sang Hyoung Park ),( Byong Duk Ye ),( Jeong-sik Byeon ),( Seung-jae Myung ),( Suk-kyun Yang ) 대한소화기기능성질환·운동학회(구 대한소화관운동학회) 2021 Gut and Liver Vol.15 No.4

Background/Aims: Self-expandable metal stents (SEMSs) can be applied to relieve colorectal obstruction secondary to incurable primary colorectal cancer or extracolonic malignancy. We aimed to identify factors associated with clinical success and the reintervention-free survival (RFS) after palliative stenting. Methods: Cases of palliative SEMS placement between 2005 and 2019 were retrieved from the institutional database and reviewed retrospectively. Logistic regression and log-rank testing followed by Cox proportional hazard analyses were performed to investigate the predictors of the clinical success of palliative stenting and factors associated with RFS, respectively. Results: A total of 593 patients underwent palliative stenting for malignant colonic obstruction (MCO). The technical and clinical success rates were 92.9% and 83.5%, respectively. Peritoneal carcinomatosis was a predictor of clinical failure (odds ratio, 0.33; 95% confidence interval [CI], 0.17 to 0.65) in the multivariate analysis. Peritoneal carcinomatosis (hazard ratio [HR], 2.48; 95% CI, 1.69 to 3.64) and stent expansion >90% on day 1 (HR, 1.62; 95% CI, 1.05 to 2.50) were associated with a shorter RFS. Neither clinical success nor RFS was associated with extracolonic malignancy. Re-obstruction, stent migration, and perforation were responsible for most reinterventions after clinically successful palliative stenting. Conclusions: In patients requiring palliative stenting for MCO, peritoneal carcinomatosis was associated with both clinical failure and short RFS. Stent expansion >90% on postprocedural day 1 was another predictor of a short RFS after clinically successful stenting. A large prospective study is warranted to establish factors associated with RFS after successful palliative stenting for MCO. (Gut Liver 2021;15:579-587)

OCHM 시스템에서 전확산에 의한 충돌 분산 기법

권재균(Jae Kyun Kwon),정방철(Bang Chul Jung),윤경수(Kyungsu Yun),성단근(Dan Keun Sung) 한국통신학회 2009 韓國通信學會論文誌 Vol.34 No.9

OFDM 이동 셀룰러 시스템에서 셀간간섭 회피 및 제거의 결합 성능 분석

권재균(Jae Kyun Kwon),이희수(Heesoo Lee),안재영(Jae Young Ahn) 한국통신학회 2008 韓國通信學會論文誌 Vol.33 No.4A

본 논문에서는 OFDM 기반 이동 셀룰러 시스템에서 셀간간섭 관리를 위해 간섭 회피 및 제거를 동시에 이용하는 방법을 설명하고, 그 성능을 모의실험을 통해 분석한다. 셀 안쪽 단말과 두 셀 경계 단말에 대해서는 간섭회피를 이용하고, 세 셀 경계 단말에 대해서는 간섭 제거를 이용하게 된다. 모의실험은 간략화된 시스템 시뮬레이션으로 수행되며, 이를 위해 링크 시뮬레이션 결과가 이용된다. 비교 대상은 간섭 관리를 하지 않은 방식, 간섭회피만을 적용한 방식, 간섭 회피와 제거를 적용한 방식의 세 가지이며, 주된 비교 수단은 하위 5% 사용자 데이터율과 평균 데이터율이고, 보조적으로 하위 5% 사용자 신호대간섭잡음비를 이용한다. 비교 결과, 간섭 관리 기법을 적용하면 셀 경계 성능이 대폭 개선되며, 대신 평균 데이터율은 소폭 저하된다. 그리고 간섭 회피와 제거를 동시에 이용하면 간섭 회피만 이용한 경우보다 셀 경계 및 평균 데이터율 측면에서 모두 우수해진다. In this paper, we explain the unified inter-cell interference avoidance and cancellation in OFDM mobile cellular systems. Interference avoidance is used for cell-interior or two-cell-edge users, and interference cancellation is applied to three-cell-edge users. The performance of the unified scheme is evaluated by simplified system simulation. Link simulation results are used in the interpretation of system simulation output. We compare three schemes which are “no interference management,” “only interference avoidance,” “both avoidance and cancellation.” Primary performance measures are the data rate of the 5th percentile user and the mean data rate. Simulation results show that interference management schemes greatly improve the cell edge performance, but slightly reduce the mean data rate. Use of both avoidance and cancelaltion is better than that of only avoidance in terms of the cell edge throughput and the mean data rate.

S-47 Predictive risk factors associated with synchronous multiple early gastric cancer

( Young Jae Kwon ),( Seok Hoo Jeong ),( Kwang An Kwon ),( Jungsuk An ),( Woon Kee Lee ),( Kyoung Oh Kim ),( Jun-won Chung ),( Yoon Jae Kim ),( Dong Kyun Park ),( Jung Ho Kim ) 대한내과학회 2016 대한내과학회 추계학술대회 Vol.2016 No.1

Background and Aim:?Previous studies evaluated risk factors of synchronous multiple early gastric cancer, but only in patients who received the same treatment modality, which may limit the applicability of the results to the general population. We aimed to elucidate the predictive risk factors of synchronous multiple early gastric cancer regardless of the treatment modality. Methods:?Patients who underwent early gastric cancer treatment between July 2005 and June 2015 were retrospectively reviewed. In total, 1529 patients who were treated for early gastric cancer were included. Further analysis was performed to verify the difference between endoscopic and surgical treatment groups. Results:?Among the 1529 patients, synchronous multiple early gastric cancer was diagnosed in 68 (4.4%) patients. The mean age of all the patients was 61.3±11.5 years. In total, 1073 (70.2%) patients were men and 456 (29.8%) patients were women. Significant differences in sex (p=0.004), gross appearance (p=0.038), depth of invasion (p=0.007), and lymphovascular invasion (p=0.039) were found between patients with solitary early gastric cancer and synchronous multiple early gastric cancer by univariate analysis. In multivariate analysis, male sex (odds ratio, 2.475; p=0.011) and submucosal invasion (odds ratio, 1.850; p=0.033) were independent predictive risk factors of synchronous multiple early gastric cancer. Significant differences in age, tumor size, longitudinal location, depth of invasion, and histology were found between patients groups depending on the mode of treatment in multivariate analysis.?Conclusions:?Male sex and submucosal invasion were predictive risk factors of synchronous multiple early gastric cancer. Patients with these factors should undergo more meticulous endoscopic surveillance.?Keywords:?Risk factors, Endoscopy, Neoplasms, Multiple primary, Synchronous