자색고구마가 사염화탄소 투여에 의한 흰쥐의 간손상 보호에 미치는 영향

조영자,김현아,방미애,오용비,정병춘,문윤호,정우진 한국식생활문화학회 2003 韓國食生活文化學會誌 Vol.18 No.3

The purpose of this study was to investigate the effects of dietary purple sweet potato(lpomoea batatas) powder on serum lipid levels and antioxidative enzymes in normal and pretective effect on hepatotoxicity rats induced by carbon tetrachlolide. Four groups of rats (3-week-old inbred Sprague-Dawley male rats) were normal rats fed control diet(C)_(1) induced hepatotoxicity rats fed control diet(EC)_(1) normal rats fed purple sweet potato diet(P), and induced hepatotoxicity rats fed purple potato sweet diet(EP). Rats were induced by single injection of 50% carbon tetrachloide(0.1 mL/100 g B.W., i.p.). The rats were fed ad libitum each of the experimental diet for 5 weeks. After 5 weeks the rats were sacrificed and activities of antioxidant enzymes and lipid peroxidation products were determined in their liver homogenates. But serum concentrations of lipid was not significant in all groups. Serum alanine aminotransferase(ALT/GPT) and aspartate aminotransferase(ALT/GPT)of the EC and EP groups were heigher than the C and P groups. The hepatic glucose 6-phosphatase(G9Pase) activity of the group fed purple potato diet(P) was lower than the other groups(p<0.05). However, The glutathione peroxidase(GPx) activities was not statistically different between the groups. Renal glutathione S-transferase(GST) activity of the EC and EP groups were lower than the C and P groups(p<0.05). In conclusion, these results suggest that purple sweet potato is believed to be possible protective effect on hepatotoxicity rats induced by carbon tetrachlolide.

차나무 영양계품종의 육성연한 단축방안

정병춘(Byeong-Choon Jeong),송연상(Yeon-Sang Song),문윤호(Youn-Ho Moon),한선경(Seon-Gyeong Han),방진기(Jin-Ki Bang) 한국차학회 2006 한국차학회지 Vol.12 No.3

The big problem of tea tree cultivation in Korea is that almost all tea tree gardens have been making with tea tree seeds gathered from the native land or artificial tea tree gardens. The second problem is that those seedling gardens are located in mountain slopes. These situations cause lower yield and make it difficult to mechanize tea farming, which in turn raises production cost and consumer price. In the case of seedling tea tree fields made with true seeds, over 80% of total tea tree gardens, are different in sprouting time and growth type among individuals and as a result, yield decreases and the quality of products is not uniform. In order to solve this problem, it is necessary to develop and supply clonal cultivars with disaster-resistant, high quality and high yielding features. The tea products made from the leaves of these tea cultivars must fit to koreans 'taste, and must be expanded to tea tree garden in plain areas. Another important thing is to improve safer material by adopting the environment-friendly cultivation practices. In addition, efforts should be exerted to lower production and processing costs for a lower consumer price, and to promote high quality. The other important things for popularization of tea consumption at home and export to overseas markets by organizing and enlarging of farmers or factories for tea products.

역사를 통해서 본 한국 차 산업 발전 저해요인과 극복방안

정병춘(Byeong-Choon Jeong),문윤호(Youn-Ho Moon),송연상(Yeon-Sang Song),한선경(Seon-Kyeong Han),방진기(Jin-Ki Bang) 한국차학회 2007 한국차학회지 Vol.13 No.3

조선 개국부터 1945년까지의 한국 차 문화는 침체상태로 경과되었다. 억불숭유정책으로 인한 불교탄압이 차밭면적과 차 생산량 그리고 차 공급량 감소를 초래하여 서민들은 부모 제사상에 올릴 차도 구하기 어렵게 되었다. 이러한 상황에서 과도한 차세징수 등은 결국 서민들의 차 생산과 차 소비생활을 못하게 억압한 결과를 초래하였다. 구한말의 조정이나 왕실에서는 많은 차를 필요로 하면서도 차 국내생산에 보다 더 적극적 대처를 하지 못하였으며 외국인들의 많은 차 산업화 권유에도 소극적이었다. 찬란했던 신라와 고려시대의 차 문화가 불교와 같이 억압받으면서 시들어지고 말았다. 왕실이나 조정에 차 문화나 산업의 중요성을 주장할만한 지도자가 없었다는 것도 이유가 될 수 있을 것이며 아사자가 속출하는 춘궁기, 보릿고개 등 가난으로 차 마실 여유가 없었던 것도 중요한 원인이 되었을 것이다. 특히 1906년에 권업모범장이 만들어지면서 많은 작물에 대한 과학적인 연구가 시작되었는데도 차에 관한 연구가 빠진 이유는 무엇이었을까? 일본인들이 자국에서 차를 수입하기 위해서라고 생각할 수도 있으나 식량부족시대로 먹거리 작물이 기호작물보다 중요하였던 까닭이 더 유력한 원인이었던 것으로 사료된다. 해방 후의 여러 가지 차 관련 기록들을 통해 우리가 반성하고 받아드려야 할 점은 첫째, 저질홍차 사건과 같은 일이 다시 발생되게 해서는 아니 되며 둘째, 커피와 술의 소비증가추세를 차 소비확대로 억제시켜야한다는 점이다. 전통차가 있는 나라에서 차류 판매액의 66%가 커피이며 전통 차는 13여%에 불과하다(2000, 식품산업연구원). 또 술 판매량도 계속 늘고 있어서 세계인들로부터 적색신호를 받고 있다. 한국 차의 정신을 생활화하기위해 노력하고 있는 많은 차인들은 엘리트 선진국민이 될 수 있는 자격조건에 차와 술, 차와 커피의 소비비율을 각각 1대1로 지킬 것을 포함시켜야 한다고 주장하고 있다. 셋째, 차 문화 부활과 차 산업발전을 위한 정부나 지자체의 지원은 철저한 분석검토를 통해 우선순위에 따라 지원되어야 하며 넷째, 정부에서는 차 관련 연구의 중요성을 인식하고 차 연구기관의 연구역량강화를 위해 적극적 지원을 해야 할 것이다. 해방 후와 1962년 후 차 산업화 촉진 또는 커피수입 억제를 위해 여러 가지 차 관련 정부의 정책이 집행되어 효과를 보기도 하였으나 농업의 특성과 일의 원칙을 정확히 이해하지 못한 업적위주의 일 추진에서 불량 홍차 사건이 발생되었다는 것을 깊이 반성해야 하며 커피수입 완화라는 후속조치는 우리 국민을 커피 애호가로 만들고 당초 목적과 달리 오히려 전통차를 멀리하게 한 매우 부끄러운 조치로 다시는 유사한 사례가 없도록 명심하여야 할 것이다. 다섯째, 차인 1세대들의 업적에 대한 자료를 수집 종합 정리하여 후세들이 맥을 이어갈 수 있도록 보존해야 할 것 등이다. 최근 들어 야기되고 있는 문제점을 배경으로 한국 차 산업 발전을 위해 추진해야할 가장 중요한 일은 녹차재고 증가요인을 명확히 분석하여 시급히 해결하는 일과 안전성 확보방안을 모색하여 단계적으로 철저하게 실천하여 소비자들에게 시급히 신뢰를 회복하는 일이다. 또 고생산비 원인을 개선하고 차 소비자 가격을 낮추어야하며 국내외 소비자들의 기호성에 맞는 품질의 차를 개발하여 국내 대중화와 수출의 길을 모색 추진하여야 한다. 국내 Flourished during the Silla and Goryeo dynasty, the tradition of Korea’s tea culture has been maintained although through difficult times. There were unfortunate historical events that significantly hindered or undermined the development of Korean tea such as the Joseon Dynasty’s policy of oppressing Buddhism, excessive tea tax collection, ignorance of the Royal Court with regards to the tea industry, indifference about tea research by the Korean government after gaining independence from the Japanese colonization, the introduction of inferior black tea, easing of coffee import regulations, delay in the scientific study of tea (starting in 1896 in Japan, Korea in 1992), various meteorological disasters, pressure to import tea, and increase of the green tea stockpile due to the increase of fermented tea. Korea’s tea culture is lagging behind because of such turbulent history and is currently threatened by Japanese and Chinese culture. Korean tea lovers are making every effort in order to lay the foundation for Korea’s own tea culture. In particular, with media reports that agrichemicals were found in green tea, the public’s distrust has grown and green tea consumption has been greatly decreased. Tea stores are returning goods on display and tea farmers are increasingly giving up production. It is impossible to advance the tea industry without the public’s trust in the safety of tea. And without development of the tea industry, the tea culture of Korea cannot really grow either. We cannot talk about the spirit of Korean tea with Chinese or Japanese tea prepared on the table in front of us. Now, every tea man should try to complete his own duties in his field in order to keep such case from occurring. I, hereby, tries to present a plan for the development of Korean tea industry by pointing out the historical problems and solutions with the tea industry.

인트라넷을 이용한 초등학교 정보 시스템의 설계에 관한 연구

정인기,박흥선,임병춘 춘천교육대학교 과학교육연구소 1997 과학교육연구 Vol.20 No.-

원장 미부낭증 1예 -증례 보고-

안병율,정춘식,이동희,유창식,김진천,이호정,이문규 대한대장항문학회 1998 Annals of Coloproctolgy Vol.14 No.3

Behavior Model of IT Governance Concerns

Byeong Soo Jung,Choon Soo Na,Byeong Ho Jeong The Research and Information Service 2010 남부대학교 논문집 Vol.10 No.-

IT governance implies a system in which all stakeholders, including the board, internal customers and related areas such as finance, have the necessary input into the decision making process. But, the concepts of IT governance are broad and ambiguous which in turn implicate difficult and inaccurate assessments. In particular, the traditional handling of IT management by board-level executives is that due to limited technical experience and IT complexity, key decisions are deferred to IT professionals. IT governance is eventually a matter of multi-criteria decision making. This article presents a hierarchical structure to understand the relationship between control structure and the complexity of collective behavior with respect to IT governance, and a corresponding fuzzy model for assessing IT governance complexity based on an extensive literature study. These can be used for a good understanding how the concerns of IT governance behave, how they interact and form the behavior of the whole system. IT governance is the preparation for, making of and implementation of IT-related decisions regarding goals, processes, people and technology on a tactical or strategic level. The model ofr assessing IT governance is employed to compare how IT governance is defined in practitioners and Cobit.

차세대 기업 정보화수준 평가 시스템에 관한 연구

임춘성(Choon Seong Leem),유은정(Eun Jung Yu),김병완(Byeong Wan Kim),신선도(Seon Do Shin),이병율(Byeong Ryul Lee),차정훈(Jeong Hoon Cha) 한국전자거래학회 2008 한국전자거래학회지 Vol.13 No.4

최근 기업 경영의 관심은 환경 변화에 신속히 대응하고, 지속적으로 성장하기 위한 경쟁력 확보에 있다. IT(Information Technology)가 이러한 기업의 경쟁력을 강화하는 핵심 동인으로서 주요한 역할을 담당하면서, 경영과 IT의 연계, IT를 통한 제품 및 서비스의 혁신등이 최근 주요한 화두로 자리 잡았다. 그러나 기존의 국내외 정보화 평가지수 및 관련 연구들은 IT 자체의 양적인 구축과 활용수준, 그 경제성 효과에 초점이 맞추어져 있어서, IT가 경영 혁신을 지원하고 주도하는 수준에 대한 평가가 미흡한 것이 사실이다. 그러므로 본 연구에서는 차세대 정보화수준 평가 시스템이 갖추어야 하는 요건을 정의하고, 이를 기반으로 한 평가영역과 평가항목을 개발한다. 또한, 기업 정보화의 다양한 특성유형을 설명할 수 있는 다차원의 해석 방식을 제시한다. 본 연구를 통해 개발된 평가시스템 EIII 2.0은 국내 금융업종의 2개 기업을 대상으로 한 파일럿 테스트로 실용성을 검증하였다. Recently, the main concerns of enterprise management activities is how to strengthen the competitiveness to quickly respond to changes and sustain the growth in business environment. As IT(Information Technology) has become to be viewed as a key driver for the business competitiveness, new paradigms, such as business and IT alignment, IT-driven product/service innovation and so on, are regarded as the hot topic in many industries. However, previous studies related to IT evaluation, which is more critical than any other IT activities, have focused on quantitative IT deployment, utilization and its economical effects. Therefore, this study presents the newly-developed evaluation domains and items based on four pairs of relative concepts in industrial informatization, and their multi-dimensional analysis methodology which explains various types of IT characteristics of enterprises. And finally, pilot tests at 2 companies in financial service sector will be performed in order to verify the practicality of the evaluation system.

간 섬유화 진단을 위한 Liver Shear Wave Elastography의 유용성

이병춘(Byeong Choon Lee),김현진(Hyeon Jin Kim),정양화(Yang Hwa Chung),최준호(Jun Ho Choi),이원홍(Won Hong Lee),차현정(Hyeon Jeong Cha) 대한초음파의료영상학회 2012 대한초음파의료영상학회지 Vol.3 No.1

목적 : 간 섬유화(Liver fibrosis) 진단에 있어 Liver Shear wave elastography와 간 조직생검의 결과를 비교하여 Liver Shear wave elastography의 임상적 유용성을 알아보고자 한다. 대상 및 방법 : 2011년 9월부터 2012년 2월까지 본원에 내원한 B형 또는 C형 간염 보균자 54명을 대상으로 Liver Shear wave elastogrphy와 간 조직생검을 같이 시행하였다. 간 조직생검의 섬유화 정도는 METAVIR 기준의 간 섬유화 단계에 따라 분류하였다. Liver Shear wave elastography 수치는 3회씩 측정하여 평균치를 구한 후, Ultrasound in Medicine & Biology 2011에 나와있는 Liver stiffness optimal cutoff value 값과 비교 분석하였다. 결과 : 전체 대상 54명 중 간 조직생검으로 나온 간 섬유화 정도는 F0~F1은 20명(37%), F2, F3는 각각 22명 (41%), 7명(13%)이었고, F4는 5명(9%)이었다. 간 섬유화 단계에 따라 간 탄성도 수치를 Optimal cutoff value값과 비교분석한 결과, F0~F1:95%(19명), F2:90%(20명), F3:85%(6명), F4:65%(3명)가 optimal cutoff value값에 일치함을 확인하였다. 결론 : Liver Shear wave elastogrphy가 간 섬유화를 진단하는데 있어, F0~F1, F2의 간 섬유화 단계에서 90% 이상 일치율을 보였으며, 이는 간 섬유화 조기 진단에 유용성이 있을 것으로 사료된다. Purpose : The purpose is to determine clinical usefulness of liver Share wave elastography in diagnosing liver fibrosis by comparing test results of liver Share wave elastography and liver biopsy. Subjects and Methods : tests of liver Share wave elastography and liver biopsy have been done on 54 inpatients who carry hepatitis Type B and Type C between the period of September of 2011 and February of 2012. The degrees of liver biopsy was classified according to the levels of liver fibrosis based on METAVIR. The rates of Liver Shear wave elastography were measured three times and their average was compared and analyzed with liver stiffness optimal cutoff value published on the Ultrasound in Medicine & Biology 2011. Results : Of all the 54 subjects, 20, 37% of them, were in the range of F0-F1 in liver fibrosis through liver biopsy. Those in the range of F2 and F3 were 22, 41% and 7, 13% respectively. The results of comparing rates of liver stiffness with Optimal cutoff value according to the liver fibrosis showed that 19 subjects, 95%, were in the range of F0-F1, 20 subjects, 90% in F2, 6 subjects, 85% in F3 and 3 subjects, 65% in F4 turned out to fit the optimal cutoff value. Conclusion : Liver Shear wave elastography tests, diagnosing the liver fibrosis, matched more than 90% in the levels of F0~F1 and F2 liver fibrosis. This is considered to be useufl in early diagnosis of liver fibrosis.

속응성을 고려한 자기부상열차용 DC-DC 전원장치

정춘병(Choon-Byeong Chung),전기영(Kee-Young Jeon),조정민(jeong-Min Jho),김대균(Dae-Gyun Kim),이승환(Seung-Hwan Lee),오봉환(Bong-Hwan Oh),이훈구(HoonGoo Lee),김용주(Yong-Joo Kim),한경희(Kyung-Hee Han) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-

The author present a modified multi-loop algorithm including feedforward for controlling a 55kW step down chopper in the power supply of Maglev. The gains of the control algorithm were selected based on pole locations formulated from a prototype Bessel transfer function model. The design incorporate tradeoffs in DC-to-DC converter hard-ware para -meters and pole locations. This perturvation is derived by subtracting the desired output voltage from the actual output voltage. The proportional and integral action stabilizes the system and minimizes output voltage error. In order to verify the validity of the proposed multi-loop controller, simulation study was tried using Matlab simulink.

Granulomatous Prostatitis After Intravesical Bacillus Calmette-Guérin Instillation Therapy: A Potential Cause of Incidental F-18 FDG Uptake in the Prostate Gland on F-18 FDG PET/CT in Patients with Bladder Cancer

Kim, Choon-Young,Lee, Sang-Woo,Choi, Seock Hwan,Son, Seung Hyun,Jung, Ji-hoon,Lee, Chang-Hee,Jeong, Shin Young,Ahn, Byeong-Cheol,Lee, Jaetae The Korea Society of Nuclear Medicine 2016 핵의학 분자영상 Vol.50 No.1

Purpose This study aimed to evaluate the possibility that Bacillus $Calmette-Gu{\acute{e}}rin$ (BCG)-induced granulomatous prostatitis can be a potential cause of benign F-18 FDG uptake. Methods A total of 395 bladder cancer patients who underwent F-18 FDG PET/CT (PET/CT) were retrospectively evaluated. Patients were divided into two groups according to BCG therapy status. Elapsed time after BCG therapy, serum PSA level, results of prostate biopsy, and the SUVmax and uptake pattern in the prostate gland were reviewed. For patients who underwent follow-up PET/CT, the changes in SUVmax were calculated. Results While 35 % of patients showed prostate uptake in the BCG therapy group, only 1 % showed prostate uptake in the non-BCG therapy group (p<0.001). Among 49 patients with FDG-avid prostate lesions, none had suspected malignancy during the follow-up period (median: 16 months). Five patients revealed granulomatous prostatitis on biopsy. The incidence of FDG-avid prostate lesions was significantly higher if the elapsed time after BCG therapy was less than 1 year compared to more than 1 year (p<0.001). Serum PSA was normal in 88 % of patients. All patients with incidental F-18 FDG uptake in the prostate gland showed focal or multifocal prostate uptake, and median SUVmax was 4.7. In 16 patients who underwent follow-up PET/CT, SUVmax was decreased in 14 patients (88 %) without treatment, and no patients demonstrated further increased prostate uptake (p<0.001). Conclusions BCG-induced granulomatous prostatitis can be a potential cause of benign F-18 FDG uptake, especially in those with a history of bladder cancer treated with BCG. In BCG-induced granulomatous prostatitis, focal or multifocal prostate uptake is frequently seen within 1 year after BCG therapy, and the intensity of prostate uptake is decreased on the follow-up PET/CT without any treatment.