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결장직장암 환자의 임상적 고찰 : 조선대학교 부속병원의 10년 간의 결과
나은종,문성표,장정환,김권천,민영돈,김성환,조현진,김정용,김경종 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.2
Background and Objectives: The colorectal cancer rates 4th in the total cancer prevalence in Korea. The clinical patient demographics were considered with the incidence rate of the colon and rectal cancer. The clinicopathological factors were analyzed for the 5 year survival rate. Materials Methods: Of the 282 patients who were operated from Jan. 1, 1992 to Dec. 31, 2001 and diagnosed by pathological biopsy as colo-rectal cancer, 234 patients were followed up. The age, sex, location of the cancer, TNM stage, operation method, histopathological classification, metastatic region, complications after operation and the survival rate were investigated. Results: Of the 234 patients, male and female consisted of 120 cases (51.3%) and 114 cases (46.7%), with an average age of 61.6 years. The average follow up period was 52.3 months and the peri operative mortality was 5.6%. The site of the cancer was most frequent at the rectum with 127 cases (54.3%). The patients were classified according to the TNM stages with 38 cases of stage 1 (16.2%), 98 cases of II (41.9%), 72 cases of III (30.8%) and 26 cases of IV (11.1%). The 5 year survival rate in the age group older than 50 was 63.3 % and 73.5% in the group younger than 50. In regard to the operation type, the 5 year survival rate was 65.4% for elective operation and 65.8% for emergency operation. The 5 year survival rate for well differentiated, moderately differentiated, poorly differentiated cancer, and mucinous adenocarcinoma was 73.7%, 60.2%, 58.3%, and 92.6%, respectively. The 5 year survival rate of each of the TNM stage is 81.1%, 74.8%, 57.0%, and 11.5% for Classes I, II, III, and IV, respectively. Conclusion: The clinical factors were analyzed for the 5 year survival rate with no statistical significance for the age, sex, and location of the cancer. The TNM stage and histopathological differentiation were statistically significant. The colon cancer showed better prognosis compared to the rectal cancer.
차윤정,박진영,장정환,김성환,김권천,조현진,민영돈 조선대학교 2001 The Medical Journal of Chosun University Vol.26 No.1
Background and Objectives: Gastric cancer is still the leading cause of cancer death in Korea, and surgery remains the only method of treatment that offers the potential for a cure. Purpose: The aims of this study are to examine the outcome of the patients with gastric adenocarcinoma who underwent curative resection and to identify the prognostic factors leading to improved survival rates in these patients. Materials and Methods: The medical records of 278 patients with gastric adenocarcinoma, treated curatively at the Chosun University Hospital between January 1990 and December 1994, were reviewed retrospectively from January 2000 to March 2000. Follow-up was obtained for 250 patients(89.9%). The survival rates were calculated by the Kaplan-Meier method, and the significance of differences between patient factors(age and sex), tumor factors(location, size, gross type, tumor depth, lymph node metastasis, and stage) and treatment factors(operation method and reconstruction type) were evaluated statistically by the log-rank test. Results: The overall five-year survival probability was 59.6%. There was no survival difference according to age and sex. The 5-year survival rates according to the tumor depth were 97.0% for Tl, 74.5% for T2, 39.6% for T3, and 23.1% for T4(p=0.0000); to the lymph node metastasis were 81,4% for N0, 51.9% for N1, and 21.2% for N2(p=0.0000); to the TNM stage were 96.7% for stage I a, 79.5% for stage I b, 68.8% for stage II, 52.9% for stage III a, 25.9% for stage III b, and 7.5% for stage IV(p=0.0000). Other statistically significant differences were shown in tumor location, size, gross type, operation method, and reconstruction type after subtotal gastrectomy. Conclusion: The most definitive prognostic factors affecting the survival rate of gastric adenocarcinoma were tumor depth, lymph node metastasis, and tumor stage. The keys to successful outcome includes early diagnosis and curative resection with radical lymph node dissection at early stage as possible.
Jeong, Sung-Eun,Park, Jae-Kweon,Kim, Jeong-Dong,Chang, In-Jeong,Hong, Seong-Joo,Kang, Sung-Ho,Lee, Choul-Gyun The Korean Society for Microbiology and Biotechnol 2008 Journal of microbiology and biotechnology Vol.18 No.12
Statistical experimental designs; involving (i) a fractional factorial design (FFD) and (ii) a central composite design (CCD) were applied to optimize the culture medium constituents for production of a unique antifreeze protein by the Antartic micro algae Chaetoceros neogracile. The results of the FFD suggested that NaCl, KCl, $MgCl_2$, and ${Na}_{2}{SiO}_{3}$ were significant variables that highly influenced the growth rate and biomass production. The optimum culture medium for the production of an antifreeze protein from C. neogracile was found to be Kalle's artificial seawater, pH of $7.0{\pm}0.5$, consisting of 28.566 g/l of NaCl, 3.887 g/l of $MgCl_2$, 1.787 g/l of $MgSO_4$, 1.308 g/l of $CaSO_4$, 0.832 g/l of ${K_2}{SO_4}$, 0.124 g/l of $CaCO_3$, 0.103 g/l of KBr, 0.0288 g/l of $SrSO_4$, and 0.0282 g/l of ${H_3}{BO_3}$. The antifreeze activity significantly increased after cells were treated with cold shock (at $-5^{\circ}C$) for 14 h. To the best of our knowledge, this is the first report demonstrating an antifreeze-like protein of C. neogracile.
MADR Algorithm to Recover Authenticity from Damage of the Important Data
Seong-Ho An,Kihyo Nam,Mun-Kweon Jeong,Yong-Rak Choi 보안공학연구지원센터 2014 International Journal of Multimedia and Ubiquitous Vol.9 No.12
In order to preserve important data including a company’s intellectual properties which require security or deserve to be archives, we generally do it electronically in disk mirroring, also known as RAID, or external storage devices. Digitized data can be corrupted if the storage devices deteriorate or by external access, and such compromised data undermine their authenticity and usability. This thesis presents a new method to recover damaged electronic data to restore their authenticity and usability.
정영일(Young Il Jeong),문성표(Seong Pyo Mun),장정환(Jeong Hwan Chang),김권천(Kweon Cheon Kim),민영돈(Young Don Min),김성환(Seong Hwan Kim),조현진(Hyun Jin Cho),김경종(Kyung Jong Kim),류소연(So Yeon Ryu) 대한외과학회 2008 Annals of Surgical Treatment and Research(ASRT) Vol.75 No.3
Purpose: Surgical site infection (SSI) is the most common nosocomial infection in surgical patients, and this accounts for 38% of all patients with nosocomial infections. Despite the advances in techniques and knowledge to prevent infection, SSI remains a significant source of postoperative morbidity and mortality, and it results in a prolonged hospital stay and increased cost. This study aims to assess the incidence of SSI and to identify the risk factors associated with SSI for patients who undergo abdominal operation. Methods: The data on 347 abdominal operations that were done under general anesthesia from 1 August 2005 to 31 July 2006 was collected and reviewed. Results: The overall incidence of SSI was 4.9%. Comorbidity was the independent risk factor for the development of SSI (P=0.011). The development of SSI was related with the American Society of Anesthesiologists (ASA) preoperative assessment score (P=0.025). The duration of the operation had a statistically significant association with an increased risk of SSI on univariate analysis. The wound classification was not associated with SSI. Staphylococcus aureus was the most frequently isolated organism, and all of the cases were methcillin-resistant Staphylococcus aureus. Conclusion: This study demonstrate that comorbidity is a significant independent risk factor for SSI.
동종 골수이식 후 만성 이식편대숙주질환과 동반되어 신증후군으로 발현된 IgA 신병증 1예
정철권,김현수,박준성,정성현,조도연,최진혁,남동기,임호영,김명성,신규태,임현이,김효철 대한조혈모세포이식학회 1999 대한조혈모세포이식학회지 Vol.4 No.2
동종 골수이식 후 발생하는 신기능부전은 원인이 다양하여 감별에 어려움이 있다. 만성 GVHD는 흉선의 기능저하에 따른 면역관용의 실패로 발생되는 자가면역현상에 의해 발생되는 것으로 알려져 있으며 드물게 신장을 침범하여 신증후군을 일으키기도 한다. CaA의 용량을 줄이거나 투약중지 후 발생한 만성 GVHD에 동반된 신증후군의 경우 조기에 신조직검사를 시행하여 감별진단하고 CsA의 용량을 증량하거나 재투약하여 좋은 치료 결과를 보일 것으로 기대된다. 저자들은 문헌고찰을 통해 동종 골수이식 후 발생된 신증후군이 유사한 임상양상을 보이며 발생기전에 만성 GVHD와 자가면역현상이 연관되어 있음을 확인하였으며 동종 골수이식 후 신증후군의 임상양상을 보이는 환자에서 병리조직학적으로 lgA 신병증을 진단하고 이러한 lgA 신병증이 발생기전에 만성 GVHD와 자가 면역현상이 연관되어 있을 가능성을 최초로 확인하였으며 CsA를 이용하여 성공적으로 치료한 경험을 하였기에 보고하는 바이다. Renal insufficiency is occasionally encountered in allogeneic bone marrow transplantation and its cause is difficult to ascertain. Chronic graft-versus-host disease (GVHD) related to thymic dysfunction is immune-mediated and involves autoreactivity of T-lymphocytes derived from donor marrow to recipient's major histocompatibility complex(MHC) minor antigens. The clinical mainifestations of chronic GVHD are similar to those of autoimmune disease but kidney involvement is rare. Few cases of nephrotic syndrome with membranous nephropathy or minimal change nephrotic syndrome have been reported to be associated with chronic GVHD in allogeneic bone marrow transplant recipient especially after cyclosporine A(CsA) withdrawal, and these cases have responded well to CsA. Therefore, it is prudent to differentiate the cause of post-transplant renal insufficiency using renal biopsy and to start CsA in a case of nephrotic syndrome associated with chronic GVHD as early as possible. We report a case who had a massive proteinuria during the post-allogeneic marrow transplantation period. The cause of nephrotic syndrome was diagnosed as IgA nephropathy by renal biopsy. The patient was successfully treated with reintroduction of CsA.
User Action-based Financial Fraud Detection Method by SVDD
Seong-Ho An,Kihyo Nam,Mun-Kweon Jeong,Yong-Rak Choi 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.2
This thesis proposes a method to detect sophisticated electronic financial frauds using SVDD. The financial industry detects electronic financial frauds using FDS, but its false positive rate is high enough to require additional authentications. It causes customers inconveniences and does not detect those sophisticated financial frauds. In order to resolve the aforementioned issues, this study proposes a method to detect such potential frauds by profiling and vectorizing user activities and device information by SVDD.
권성헌,강원석,김인실,박판욱,윤영삼,정용옥 한국환경과학회 1998 한국환경과학회지 Vol.7 No.4
Aqueous phase adsorption of phenols by granular activated carbon was studied in a batch adsorption vessel. Adsorption isotherms of phenol(Ph), p-chlorophenol(PCP) and p-nitrophenol (PNP) from aqueous solution on granular activated carbon have been obtained. The experimental data were analyzed by the surface and pore diffusion models. Both models could be applied to predict the adsorption phenomena. However, the pore diffusion model was slightly better than the surface diffusion model in representing the experimental data for the initial concentration changes. Therefore, the pore diffusion model was used to predict the change of operating variables such as the agitation speed and particle size of adsorbent which have influence on the film resistance and intraparticle diffusion.