유두상 갑상선암종 환자의 수술요법 후 혈청 타이로글로불린

최인석,예병국,한군택,심문섭,In Seok Choi,M,D,Byung Kook Yea,M,D,Koon Taek Han,M,D,and Mun Sup Sim,M,D 대한갑상선-내분비외과학회 2001 The Koreran journal of Endocrine Surgery Vol.1 No.2

Purpose: Postoperative serial serum thyroglobulin (Tg) measurements on levothyroxine (L-T<SUB>4</SUB>) therapy in patients with differentiated thyroid carcinoma (DTC) is known to be useful in monitoring tumor progression or regression. The objective of this study was to evaluate the significance of serum Tg levels on L-T<SUB>4</SUB> therapy after surgery. Methods: To determine the basal serum Tg levels on L-T<SUB>4</SUB> therapy after surgery in patients with DTC, Tg levels during the initial 2 year-period after surgery were analyzed retrospectively in 37 patients who had undergone a total thyroidectomy for papillary thyroid carcinoma with (Group 2) or without (Group 1) palpable cervical lymph node metastasis. The Tg levels had been measured 1 to 4 times for each patient with total of 53 and 35 times in Group 1 and Group 2 respectively. Results: The basal Tg levels in Group 1 were all less than 4 ng/mL with 79.3% less than 2 ng/mL, and those in Group 2 were all less than 9 ng/mL with 71.4% less than 2 ng/mL. Conclusion: The data suggests that the postoperative serum Tg level of 10 ng/mL can be a useful reference value in long-term follow-up after total thyroidectomy for patients with DTC. (Korean J Endocrine Surg 2001;1:255-258)

IPv6 전환 기술의 보안 위협 분석 및 보안 설계에 대한 연구

최인석,김영한,정수환,Choi, In-Seok,Kim, Young-Han,Jung, Sou-Hwan 한국통신학회 2005 韓國通信學會論文誌 Vol.30 No.11B

IPv4로부터 IPv4/IPv6로의 전환 및 상호공존을 위한 처리 과정에서의 보안적인 고려는 상당히 중요한 문제이다. IPv4 네트워크와 IPv6 네트워크 사이의 이질적인 문제로 인해 기존의 IPv4 네트워크에서는 일어나지 않았던 다양한 위협이 존재한다. 본 논문에서는 지금까지 제안된 IPv4/IPv6 전환 기술에 대해 살펴보고, 전환 기술에서 나타날 수 있는 다양한 보안적인 위협에 대해서 분석을 하고, 그에 대한 대응방안에 대해 제시하였다. 6to4 전환기술에서는 DoS 및 DRDoS 공격 위협을 분석하고, 주소 무결성 검사방법을 해결책으로 제시하였다. 또, DSTM과 NAT-PT 전환 기술에서는 IPv4 주소를 할당하는 IPv4 주소 pool을 가진 서버에 대한 IPv4 주소 고갈 위협을 분석하였고, IPv4 주소 고갈 위협 문제를 해결하기 위해서 DSTM 전환 기술에서는 challenge-response 메커니즘 방안을 제시하였다. The IETF has created the v6ops Working Group to assist IPv6 transition and propose technical solutions to achieve it. But it's quite problem which security consideration for a stage of IPv4/IPv6 transition and co-existence. There are new security problem threat that it caused by the characteristics of heterogeneity. In this paper, we describe IPv6 transition mechanisms and analyze security problem for IPv6 transition mechanism. also we propose security consideration and new security mechanism. We analyzed DoS and DRDoS in 6to4 environment and presented a address sanity check as a solution. We also showed an attack of address exhaustion in address allocation server. To solve this problem, we proposed challenge-response mechanism in DSTM.

유방암으로 항암 치료받는 환자에서 발생하는 과도한 골수 억제의 예측인자

이정석(Jung Suk Lee),이혜윤(Hye Yoon Lee),성낙송(Nak Song Sung),전기원(Ki Won Cheon),문주익(Ju Ik Moon),이상억(Sang Eok Lee),최인석(In Seok Choi),최원준(Won Jun Choi),윤대성(Dae Sung Yoon) 대한종양외과학회 2016 Korean Journal of Clinical Oncology Vol.12 No.1

Purpose: Myelosuppression, particularly neutropenia, is one of the most frequent and serious toxicity seen in patients with breast cancer undergoing systemic chemotherapy. However, the predictive factors for development of severe neutropenia in chemotherapy remain unknown. We therefore evaluated predictive factors for excessive myelosuppression. Methods: We retrospectively analyzed 341 patients with breast cancer treated with chemotherapy from 2000 to 2012. Clinicopathological characteristics, number of using of granulocyte colony-stimulating factor (G-CSF), and pretreatment hematologic values were extracted from the electronic medical record system. Patients were sorted 2 groups by number of using G-CSF in each chemotherapeutic regimens; group 1 is more G-CSF (within high 20 percentile) and 2 less G-CSF using group (within lower 20 percentile). Results: Number of using G-CSF was ranged 0–83 (mean 10.76). One hundred one patients were in group 1 and 65 patients were in group 2. Mean of number of G-CSF using was 0.21 in group 1 and 28.02 in group 2. Pretreatment white blood cell, hemoglobin and platelet count were lower in group 2 than in group 1 (6.88×103/μL vs. 5.97×103/μL, 12.63 g/dL vs. 11.90 g/dL, and 275.95×104 μL vs. 227.37×104 μL). There were no statistically differences in other clinicopathologic characteristics such as age, body mass index or comorbidities, hormonal receptor, stage, and other pretreatment hematologic values. Conclusion: Pretreatment white blood cell count, hemoglobin and platelet count can be used to identify patients at increased risk of significant myelosuppression undergoing chemotherapy with breast cancer. This information can be used to target high-risk patients for prophylactic treatment.

GC/MS를 이용한 폴리스타이렌 소재의 PCBs 정량분석 방법 개발

이재인(Jae in LEE),최기인(Gi In CHOI),최철호(Zel Ho CHOI),조훈식(Hun Sik CHO),최인석(In seok CHOI),이태규(Tai Kyu LEE) 한국생태공학회 2012 한국생태공학회지 Vol.3 No.1

A study on the determination method of PCBs(polychlorinated Biphenyls) content in polystyrene(PS) materials by GC/MS was performed. The toluene was selected for the extraction of PCBs in plastics and the best extraction time was 4 hours. The artifact materials produced from polystyrene with 2,2’,3,4,4’,5,5’-heptachlorobiphenyl standard solution were examined by homogeniety test. PCBs in average concentration of 118 mg/kg were quantitatively determined for the artifact materials by applying our procedure in interlaboratory comparison test.

부산 , 경남지역 주강 공장의 CO2 주형 고사의 발생실태와 재생에 관한 연구

최준오(Jun Oh Choi),김민섭(Min Seop Kim),최인석(In Seok Choi),천병욱(Byung Wook Cheon),최창옥(Chang Ock Choi) 한국주조공학회 2002 한국주조공학회지 Vol.22 No.3

N/A According to the investigation of waste CO_2 molding sand in the 15 steel foundries in Busan and Gyeong area, about 1 ton of waste CO_2 molding sand per ton of steel castings production was produced In order to reduce amount of Na_2O, Loss of Boiling (L.O.B), Loss of Ignition (L.O.I), Conductivity and PH which are present in the waste CO_2 molding sand below the reclamation effect, more than 50% of elimination for reclamation was required. It was found that the waste CO_2 molding sand does not contain a harmful component designated by industrial waste materials. Reclamation of the waste CO_2 molding sand was practically achieved by an abrasive-dry reclamation process. According to bench time of the sodium silicate-bonded CO_2 molding sand, reduction of compressive strength and surface stability index(S.S.I) become slowdown. Therefore, the reclaimed sand could be allowed the reuse of molding sand in CO_2 molding process including core sand.

국내 의료 방사선 안전문화 활동 현황

윤용수(Yong-Su Yoon),김정민(Jung-Min Kim),김현지(Hyun-Ji Kim),최인석(In-Seok Choi),성동욱(Dong-Wook Sung),도경현(Kyung-Hyun Do),정승은(Seung-Eun Jung),김형수(Hyung-Soo Kim) 대한방사선과학회(구 대한방사선기술학회) 2013 방사선기술과학 Vol.36 No.3

2011년 3월 일본 동북해안의 지진과 해일, 그리고 연이은 후쿠시마 원전사고에 따른 국내의 방사선 피폭에 대하여 심각하게 우려되고 있다. 후쿠시마 원전에서 누출된 방사성 물질이 미량이나마 국내에도 검출되고 있어 방사성 물질에 대한 시민들의 불안감이 고조됨과 동시에, 국내 언론에서는 과학적인 접근 보다는 실시간으로 시민의 불안감에 편승하여 대중들을 방사선에 대한 공포로 몰아가는 상황이 자주 연출되고 있다. 이에 현상을 올바르게 직시하고 대안을 제시하기 위해 세계 각국의 보건, 의료기관 및 학술 단체에서는 의료방사선 안전문화 확산을 위해 다양한 정보를 제공하고, 의료방사선이 안전하다는 인식을 일반인에게 확산시키기 위한 캠페인을 실시하고 있다. 이에 국내에서도 지난 2011년 6월 초 식품의약품안전처의 제안으로 ‘의료용 방사선 관련 유관학회의 공동 심포지엄’의 개최를 위하여 마련된 유관학회 전문가 회의에서 공동 심포지엄의 개최 결정과 더불어, 의료용 방사선 안전을 위한 연합회 구성을 공식화하여 ‘의료방사선안전문화연합회(KARSM, the Korean Alliance for Radiation Safety and Culture in Medicine)’를 창립하게 되었다. 따라서 본 보고에서는 국외 의료방사선 안전문화 활동들에 대한 소개와 더불어 국내 의료방사선 안전문화 확산을 위한 의료방사선안전문화 연합회의 사업을 중점적으로 소개하고자 한다. 의료방사선 안전문화 확산과 관련한 여러 활동들을 통하여 일반 대중들에게 의료방사선의 막연한 공포감을 해소하고 바람직한 인식 형성에 기여하고자 한다. There are many concerns about radiation exposure in Korea after Fukushima Nuclear Plant Accident on 2011 in Japan. As some isotope materials are detected in Korea, people get worried about the radioactive material. In addition, the mass media create an air of anxiety that jump on the people’s fear instead of scientific approach. Therefore, for curbing this flow, health, medical institute from the world provide a variety of information about medical radiation safety and hold the campaign which can give people the image that medical radiation is safe. At this, the Korean Food and Drug Administration(KFDA) suggested that make the alliance of medical radiation safety and culture on August, 2011. Seven societies and institutions related medical radiation started to research and advertise the culture of medical radiation safety in Korea. In this report, mainly introduce the activities of the Korean Alliance for Radiation Safety and Culture in Medicine(KARSM) for spreading culture of medical radiation safety from 2011 to 2012.

영상의학검사 일반촬영 분야의 촬영기법에 대한 분석

김정수(Jung-Su Kim),김정민(Jung-Min Kim),이영한(Young-Han Lee),서덕남(Deok-Nam Seo),최인석(In-Seok Choi),남소라(So-Ra Nam),윤용수(Yong-su Yoon),김현지(Hyun-Ji Kim),민혜림(Hye-Lim Min),허재(Jea Her),한성규(Seong-Gyu Han) 대한방사선과학회(구 대한방사선기술학회) 2014 방사선기술과학 Vol.37 No.3

2013년 국민건강보험심사평가원의 의료기관 데이터베이스에 따르면 1118개의 병.의원에 영상의학과가 개설되어있다. 이들 병원에는 CT, 투시촬영장치, 일반촬영장치와 같은 의료용 방사선 발생장치가 운영되고 있다. 이 중에서도 일반촬영장치는 가장 많은 병원에서 운영되고 있는 장비이다. 일반촬영장치의 경우 film-screen 장치에서 digital radiography 로 급격하게 변하고 있다. 하지만 그 촬영기법은 films-screen 기법 을 그대로 사용하고 있어 디지털 장치의 맞는 촬영기법의 개발을 위한 전반적인 실태 조사가 필요하다. 이에 본 연구에서는 국내 의료기관의 일반촬영기법에 관한 조사를 시행하여 실제 병원에서 사용하고 있는 일반촬 영기법의 기술적 항목에 대한 현황을 파악하여 보았다. 본 연구에서는 의료기관에서 일반적으로 사용되는 일 반촬영기법 26개에 대한 촬영기법의 전국 단위 조사에서 흉부, 두부, 척추, 골반에 해당하는 검사에 대한 분석을 시행하였다. According to database of medical institutions of health insurance review & assessment service in 2013, 1118 hospitals and clinics have department of radiology in Korea. And there are CT, fluoroscopic and general radiographic equipment in those hospitals. Above all, general radiographic equipment is the most commonly used in the radiology department. And most of the general radiographic equipment are chang-ing the digital radiography system from the film-screen types of the radiography system nowadays. However, most of the digital radiography department are used the film-screen types of the radiography system. Therefore, in this study, we confirmed present conditions of technical items for general radiog-raphy used in hospital and research on general radiographic techniques in domestic medical institutions. We analyzed 26 radiography projection method including chest, skull, spine and pelvis which are gen-erally used in the radiography department.

올림픽 상업주의에 따른 솔리더리티(Solidarity) 고찰

최인석(In Seok Choi),이현호(Hyun Ho Lee),이화정(Hwa Jeong Lee) 한국여성체육학회 2007 한국여성체육학회지 Vol.21 No.6

개선된 적응형 콘트라스트 알고리즘 설계

최인석 ( In-seok Choi ),윤진석 ( Jin-suk Youn ),조화현 ( Hwa-hyun Cho ),최명렬 ( Myung-ryul Choi ) 한국정보처리학회 2004 한국정보처리학회 학술대회논문집 Vol.11 No.1

본 논문은 입력영상의 화질 향상을 위하여 기존의 스트레칭 알고리즘을 이용하여 개선된 콘트라스트 알고리즘을 제안하였다. 입력영상의 픽셀(pixel)을 DR(Difference Range)의 범위에 따라 정해진 가중치를 적용하여 새로운 픽셀을 출력한다. 특별한 사용자 정의(User Define)없이 실시간적으로 화질을 개선할 수 있는 장점이 있다. 또한, 하드웨어 적인 측면에서 곱셈 과 나눗셈 연산을 배럴쉬프트(Barrel Shift)를 이용하여 하드웨어 복잡도를 감소 시켰다. 제안한 방식의 알고리즘의 검증을 위하여 C를 이용한 시각적 검증과 하드웨어 측면에서의 검증을 VHDL을 이용한 컴퓨터 시뮬레이션을 통해 확인하였다.

여가테크를 위한 골프참가자의 여가제약과 지속의도 관계

최인석(In Seok Choi) 한국여가레크리에이션학회 2010 한국여가레크리에이션학회지 Vol.34 No.1

The purpose of this study is to examine the relationship between the constraints imposed on taking leisurely activities and the intention to continue among the golf players for Leisure-tech, in order to present basic facts to promote the popularization of golf and the continuation of the sport. For this study research was carried out among the golf course users in Kyeonggi and Seoul areas. Researched material was analyzed using SPSS 15.0 Statistic Package to draw independent-sample T-test, one-way ANOVA and multiple regression. The analyzed facts are as following. First, the gap between the constraint imposed on taking leisurely activities and the player`s intention to continue the sport depending on gender is internal constraint, depending on age is interpersonal and structural constraints, depending on monthly income, golf career, practice time is interpersonal constraint, and depending on golf level is internal constraint. The analyzed result showed that the difference in the intensity of the intention to continue is influenced by golf level, practice time and utilization frequency. Second, the research showed that the structural sides of leisure constraints-informational constraint, time constraint, economic constraint, accessibility constraint-influence the intention to continue.