전부도재관용 레진시멘트의 생체적합성에 관한 연구

김광준,김성훈,진태호,Kim Kwang-Jun,Kim Sung-Hoon,Jin Tai-Ho 대한치과보철학회 2003 대한치과보철학회지 Vol.41 No.2

Statement of problem : Resin cements were used widely on all ceramic crowns, but the influence of resin cements on biocells was not understood clearly. Purpose : This study was investigated to evaluate the biocompatibility of resin cements for all-ceramic crowns. Material and Method : The resin cements used in this study were Panavia F (Kuraray Co., Ltd. Japan), Variolink II (Vivadent Ets., Schann / Liechtenstein), and Bistite II (Bistite dual cure resin cement-clear Tokuyama Soda Co. Japan). The viability of normal human oral keratocytes, gingival fibroblast, and gingival fibroblast immortalized by Human Papilloma virus 16 was measured in vitro for evaluation of cytotoxicity on resin cements, and the response of pulp tissue was analyzed and evaluated with light microscope after application of cements at cutting edge of incisors. Results : The normal human oral keratocytes was the most sensitive to toxicity of resin cement, and toxicity of cements was higher in Bistite II than in Variolink II. The cell viability of immortalized gingival fibroblast did not affected by type of cement and cultivation period, but there was a tendency that cytotoxicity in Bistite II was higher than in Variolink II. The cell viability of gingival fibroblast was similar to that of immortalized gingival fibroblast regardless of cement type, but Bistite II showed more toxic than others after 5 days cultivation. The responses of pulp tissue according to cement type were similar after 2 days cultivation, but revealed high toxicity in Bistite II after 10 days cultivation. Conclusion : Variolink II was more biocompatible than any other resin cements used in this study.

연성 의치상 이장재의 염색 저항성에 관한 연구

김광준,조혜원,진태호,Kim, Kwang-Jun,Cho, Hye-Won,Jin, Tai-Ho 대한치과보철학회 2000 대한치과보철학회지 Vol.38 No.4

This study was investigated to compare the staining resistance of soft denture liners. Specimens were made of Coe-soft, Coe-comfort, Soft-liner, Visco-gel, and were stored in 1% methyleneblue solution for 24 hours. The amounts of color change before and after treatment with mono-poly and thermocycling were measured by colorimeter(TC-6FX, Tokyo Denshoku Co. Ltd, Japan) for evaluation of staining resistance. The following conclusions were drawn from this study. 1. The staining resistance of Visco-gel was increased, but there was no changes of staining resistance in Coe-soft, Coe-comfort, and Soft-liner after treatment with monopoly. 2. The staining resistance of the Coe-comfort was the least in all soft denture liners. 3. The staining resistance of Visco-gel and Soft-liner were decreased after thermocycling.

VLAN을 이용한 네트워크 분할 환경에서의 네트워크 접근 제어 우회 공격 탐지 및 방어 기법

김광준(Kwang-jun Kim),황규호(Kyu-ho Hwang),김인경(In-kyoung Kim),오형근(Hyung-geun Oh),이만희(Man-hee Lee) 한국정보보호학회 2018 정보보호학회논문지 Vol.28 No.2

불필요한 트래픽의 송수신을 통한 분리된 조직/부서 간의 내부 자료 유출을 방지하기 위해 많은 조직에서 네트워크를 분할하여 망을 관리한다. 물리적으로 별도의 장비를 기반으로 하는 것이 가장 근본적인 네트워크 분할 방식이나 이보다 적은 비용으로 구축이 가능한 가상랜(Virtual LAN, VLAN) 네트워크 접근 제어 기능을 활용하여 논리적으로 네트워크를 분할 · 운영하는 사례가 존재한다. 본 연구에서는 VLAN ID값을 검색하는 스캐닝 기법과 Double Encapsulation VLAN Hopping 공격기법을 활용해 VLAN을 이용하여 분할된 네트워크 간 통신 우회 가능성을 제시한 후, 스캐닝을 통해 획득한 VLAN ID 정보를 이용한 자료 유출 시나리오를 제시한다. 또한 이 공격을 탐지 및 차단하기 위한 기법을 제안하고 구현을 통해 제시된 기법의 효과에 대해 검증한다. 본 연구는 궁극적으로 VLAN으로 분리된 네트워크 취약점을 활용한 자료 유출 또는 외부 사이버 공격을 차단함으로써 VLAN 이용 환경의 보안성 향상에 기여할 것으로 기대한다. Many organizations divide the network to manage the network in order to prevent the leakage of internal data between separate organizations / departments by sending and receiving unnecessary traffic. The most fundamental network separation method is based on physically separate equipment. However, there is a case where a network is divided and operated logically by utilizing a virtual LAN (VLAN) network access control function that can be constructed at a lower cost. In this study, we first examined the possibility of bypassing the logical network separation through VLAN ID scanning and double encapsulation VLAN hopping attack. Then, we showed and implemented a data leak scenario by utilizing the acquired VLAN ID. Furthermore, we proposed a simple and effective technique to detect and prevent the double encapsulation VLAN hopping attack, which is also implemented for validation. We hope that this study improves security of organizations that use the VLAN-based logical network separation by preventing internal data leakage or external cyber attack exploiting double encapsulation VLAN vulnerability.

공공의료와 민간의료 자원을 활용한 선천성 이상 감시체계 모델

김광준(Kwang Jun Kim),임종한(Jong Han Leem),하은희(Eun Hee Ha),임문환(Moon Whan Im),홍윤철(Yun Chul Hong),이보은(Bo Eun Lee),문혜성(Hye Sung Moon),안정자(Jung Ja Ahn),우복희(Bock Hi Woo) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.7

목적 : 한국에서 선천성 이상과 저체중아의 발생 원인을 규명하기 위하여, 역학적인 선천성이상모니터링 체계를 구축하는 것이 필요하다. 본 연구의 목적은 선천성 이상의 발생률과 발생 양상을 평가할 수 있는 선천성이상 감시체계의 새롭고 실제적인 모델을 설계하고, 시범적으로 인천시 연수구에서 이를 구축하는 것이다. 연구 방법 : 보건소와 민간 병의원이 협력하여 선천성이상을 모니터링 할 수 있는 감시체계를 구축하였으며, 인터넷 웹에 기반을 둔 전산화 보고체계와 자료관리체계가 만들어졌다. 훈련된 간호사가 2년동안 출생 신고서, 보건소 및 병의원 보고자료, 분만실 자료, 의무기록 등을 능동적으로 수집하였다 (1차년도 1998.12.1- 1999.11.31; 2차년도 2000.1.1-2000.12.31). 결과 : 1, 2차년도의 모니터링을 통하여, 본 연구에서는 1차년도 총출산 2482건중 25건, 2차년도 총 출산 3490건중 28건의 선천성이상 건수를 확인하였다. 총 출산아 1000명중 선천성이상 출산율은 1, 2차년도에 각각 10.1, 8.0이었다. 1차년도에 선천성이상의 가장 큰 비율은 근골격계 계통으로 전체의 28.0%이였다. 1차년도 소화기, 심혈관, 구개열 및 구개순 선천성이상의 비율은 전체의 20.0%, 12.0%, 12.0%이였다. 2차년도에 선천성이상의 가장 큰 비율은 소화기 계통으로 전체의 21.4%이였다. 2차년도 심혈관, 근골격계 선천성이상의 비율은 전체의 17.9%, 14.3%이였다. 결론 : 결론적으로, 우리는 인천시 연수구에서 인구집단을 대상으로 한 선천성이상 감시체계를 구축할 수 있었다. 한국에서 인구집단을 기반으로 한 선천성이상 감시체계를 구축하기 위한 가장 현실적인 방안은 우선 한 지역에서 보고에 참여하는 공공 및 민간병원 보고자를 조직하고, 보고체계 및 자료관리체계를 구축하며 실제적으로 적용 가능하고 효율적인 모델을 만들고, 이를 근거로 타지역에 이 모델을 확산시키는 것이다. Objective : To discover the etiology of birth defects and low birth weight, it is necessary to establish epidemiological birth defects monitoring system in Korea. Our aim was to develop new practical model in Incheon to establish birth defects monitoring system to evaluate the incidence rate and patterns of birth defects in Korea. Methods : Public health center and private hospitals and clinics participated in this monitoring system. Web based reporting system have been built. Trained nurses actively collected the records obtained from delivery units in the participating hospitals during 2 years (first year: December 1st, 1998-November. 31, 1999; second year: January 1 st, 2000-December 31 th, 2000). Results : Through this monitoring system at 1 st year and 2 nd year, we observed 25 birth defect cases from 2482 births, 28 birth defect cases from 3490 births including live births and stillbirths. The incidence of birth defect per thousand person was 10.1, 8.0 respectively. At 1st year, the highest proportion of birth defects was 28.0% in musculoskeletal system. The proportion of birth defects in gastrointestinal system, cardiovascular system and cleft lip & cleft palate were 20.0%, 12.0%. 12.0%. At 2 nd year, the highest proportion of birth defects was 21.4% in gastrointestinal system The proportion of birth defects in cardiovascular system and musculoskeletal system were 17.9% and 14.3%. Concluion : In conclusion, we could build population-based monitoring system for birth defects successfully in Yonsu gu, Incheon. To establish population-based monitoring system for birth defects in Korea, it is necessary to organize the reporters of public health center and private hospitals and clinics, to build an available reporting system, and to extend participating centers for birth defects monitoring systems.

엘리트 복싱선수들의 체중감량법에 따른 인체환경 요인 비교 분석

김광준(Kwang-Jun Kim),김영수(Young-Soo Kim),송홍선(Hong-Sun Song),박세정(Sae-Jong Park),정진욱(Jin-Wook Chung),이장원(Jang-Won Lee) 한국생활환경학회 2013 한국생활환경학회지 Vol.20 No.4

The purpose of this study was to find out the difference of human environmental factors(physical fitness and stress hormone) between two weight loss methods in national boxing players. 8 male boxers in national team participated in this study. In the 1st weight loss period(WLP), boxers took rapid weight loss during short period by using fast and sauna. In 2nd WLP, boxers took weight loss 1.5 kg per week during 2 weeks and received the systematic physical/nutritional program. The change of physical fitness and stress hormone were measured before and after weight loss of each period. The results were as follows. First, pulmonary function, isometric strength(back strength, left grip strength), isotonic maximal strength(bench press), and isokinetic strength(trunk extension) showed significant decrease after 1st WLP. However in 2nd WLP, all factors of physical fitness showed a tendency to improve or maintain and no factors were significantly decreased. Second, in stress hormone, there was no significant difference before and after WLP. However, cortisol and DHEA at wake-up time and cortisol at 11am showed a tendency to increase in 1st WLP. In conclusion, unscientific weight loss can cause problems in the conditioning of the boxing players. Therefore elite boxing players need a scientific weight loss method and systematic training program during WLP to maintain optimal conditioning.

체급별 국가대표 복싱선수의 폐기능, 무산소성 파워 및 등속성 근력 비교 연구

김광준 ( Kwang Jun Kim ),정진욱 ( Jin Wook Chung ) 한국운동생리학회 2008 운동과학 Vol.17 No.2

10주간 코어 재활 트레이닝이 요통유발 골프선수의 유연성, 등속성 근력, 경기수행력 및 통증에 미치는 영향

김광준 ( Kwang Jun Kim ),정진욱 ( Jin Wook Chung ) 한국운동생리학회(구-한국운동과학회) 2009 운동과학 Vol.18 No.1

한국 국가대표 복싱선수들의 체급별 신체조성 및 전문체력 프로파일

김광준 ( Kwang Jun Kim ),송홍선 ( Hong Sun Song ),민석기 ( Seok Ki Min ) 한국운동생리학회 2016 운동과학 Vol.25 No.1

PURPOSE: The purpose of this study was to analyze the differences of body composition and specific physical fitness by weight category, and examine the reciprocal relationship in the national amateur male boxers. METHODS: The national amateur boxers were classified into light weight category (LWC, n=14), middle weight category (MWC, n=15), and heavy weight category (HWC, n=14). The subjects were measured for body composition and specific physical fitness: body fat, BMI, maximal strength (bench press, squat), anaerobic power (lower/upper body mean and peak power, power drop rate), isokinetic strength (knee and trunk), and cardiovascular endurance (AT, HRmax, VO2max). One-way repeated ANOVA was used to evaluate the differences between three groups and pearson`s correlation analysis was applied to examine the relationship between body composition and specific physical fitness. RESULTS: The results of this study indicated that the HWC showed significantly higher body fat and BMI compared to the LWC and MWC (p<.05). The LWC was significantly lower in the peak power of the upper body compare with the MWC and HWC (p<.05). The HWC was significantly higher in the power drop rate compare with the LWC (p<.05). On the other hand, the was significantly lower in the isokinetic trunk flexion, HRmax, and VO2max compare with the LWC and MWC (p<.05) while the LWC showed the best level in HRmax and VO2max. There were significantly reciprocal relationships between body fat, BMI and specific physical fitness factors (p<.05). In particular, body fat, squat, mean and peak power showed significant relationships with many variables. CONCLUSIONS: The LWC and MWC of the national amateur boxers showed comparatively greater level of VO2max. However, the power endurance of the upper body and the peak power of the body have been estimated to be somewhat low. The HWC needs to maintain an ideal body fat, and pay attention to the strengthening of the core flexor and cardiovascular endurance. Successful preparations may be accomplished for the Rio Olympics through the efficient strategy and specific physical training based on the results of the study

12주간의 복합 파워트레이닝(Complex Power Training)이 여자 프로골퍼의 근력, 파워 및 드라이버 수행력에 미치는 영향

김광준 ( Kwang Jun Kim ),김효중 ( Hyo Jung Kim ),정진욱 ( Jin Wook Chung ) 한국스포츠정책과학원(구 한국스포츠개발원) 2011 체육과학연구 Vol.22 No.1

이 연구의 목적은 12주간의 복합 파워트레이닝(complex power training, CPT)이 여자 프로골퍼의 근력, 파워, 드라이브 수행력에 미치는 영향을 규명하는 것이다. 복합 파워트레이닝 프로그램은 주기화 개념을 적용한 근력 및 파워 운동으로 이루어졌으며, 연구 대상은 엘리트 여자골퍼 16명이었다. 이들을 트레이닝 집단(8명)과 비교집단(8명)으로 구분하여 16주간 처치하였다. 근력변인으로서 요근력과 상지와 하지의 근력을, 파워 변인으로는 윙게이트 테스트의 최고파워, 서전트 점프, 등속성 각신근 파워를, 드라이버 수행력으로 클럽헤드 스피드, 공중 비거리, 볼 스피드, PTI(power transfer index)를 측정하여 트레이닝 효과를 분석하였으며, 다음과 같은 결과를 얻었다. 등속성 요근력 중 굴근(F=5.102, p=.040)과 굴근/신근 비율(F=5.945, p=.029), 등장성 최대근력 중 벤치프레스(F=10.928, p=.005), 근파워 변인 중 각신근에 대한 좌 (F=5.684, p=.0320)·우측(F=5.923, p=.029) 파워와 서전트 점프(F=8.058, p=.013)에서 트레이닝 집단이 트레이닝 이후 비트레이닝 집단에 비해 증가한 결과를 보이면서 측정시기와 집단의 상호작용 효과가 나타났다. 반면에 등속성 요근력 중 신근은 트레이닝 그룹은 증가하고 통제집단은 감소하는 경향(p=.073)을 보였으나 유의한 차이는 나타나지 않았다. 드라이버 수행력 중에서는 공중비거리(F=8.311, p=.012), 볼 스피드(F=14.511, p=.002), 클럽헤드스피드(F=5.777, p=.031) 및 PTI 모두에서 비트레이닝 집단은 동일 또는 소폭 감소한 반면 트레이닝 집단은 증가한 결과를 보여 측정시기와 집단의 상호작용 효과가 나타났다. 결론적으로 주기화 개념을 기본으로 골퍼들의 경기특성에 맞도록 구성한 복합 파워트레이닝(CPT)은 여자프로골퍼들에게 경기력 향상을 위해 요구되는 근력과 파워 및 드라이버 수행력을 향상시킨 것으로 나타났으며, 프로골퍼들의 선진화된 체력훈련프로그램의 구축을 위해서는 이와 관련된 연구가 지속되어야 할 것으로 보인다. The purpose of this study was to investigate the effect of 12 weeks complex power training (CPT) on strength, power, and driver performance of elite female golfers. CPT was consisted of mixture of strength and power components with application of periodization. 16 female golfers participated and divided into CPT group (n=8) and non CPT group (n=8). Trunk isokinetic strength, upper and lower isotonic strength, leg muscle power, peak power by wingate test, sargent jump, and driver shot performance (driving distance, ball speed, club head speed, & power transfer index) were measured before and after 12weeks` CPT. As a results, flexors (F=5.102, p=.040) and ipsilateral ratio (F=5.945, p=.029) in trunk strength, bench press (F=10.928, p=.005) in isotonic strength, leg extensor left (F=5.684, p=.320) and right (F=5.923, p=.029) in leg muscle power, and sargent jump (F=5.684, p=.320) showed significant interaction. In driver shot performance, driving distance (F=8.311, p=.012), ball speed (F=14.511, p=.002), club head speed (F=5.777, p=.031), & power transfer index showed significant interaction. In conclusion, complex power training with periodization concept specified to female golfers turned out to be effective for improving strength, power and driver performance. Therefore, to develop the advanced fitness conditioning program for professional golfers, this type of study should be continued.

단기간 체중감량이 아마추어 복싱 선수들의체성분 및 무산소성 운동능력에 미치는 영향

김광준 ( Kwang Jun Kim ),허기주 ( Ki Joo Hur ) 한국스포츠정책과학원(구 한국스포츠개발원) 2014 체육과학연구 Vol.25 No.2

이 연구의 목적은 아마추어 복싱 선수들을 대상으로 단기간 체중감량이 선수들의 체성분 및 무산소성 운동능력에 미치는 영향을 알아보는 것으로써 10명의 대학 복싱선수들을 두 가지 형태의(5-7일 5kg 이상 감량 vs 2주간 3kg 이내 감량) 체중감량 방법에 참여시킨 후 체중감량 전후에 각각 체성분 및 무산소성 운동능력을 평가하였다. 무산소성 운동능력은 1회 최대로 들어 올릴 수 있는 벤치프레스와 스쿼트 무게를 측정하였으며, 자전거에르고미터를 이용한 윙게이트 테스트 통해 근파워와 파워지구력을 평가하였다. 체성분 분석을 위해서는 기상 후 공복 시 중간소변과 타액을 채취하여 비교분석하였으며, 다음과 같은 결과를 얻었다. 첫째, 무산소성 운동능력은 1차 체중감량기에서는 스쿼트에 대한 최대근력(p=.003)과 윙게이트 테스트에 의한 최고파워(p=.023), 평균파워(p=.015) 모두 유의하게 감소한 결과를 보였으며, 2차 체중감량기에서는 전과 후 측정에서 유의한 차이는 나타나지 않았다. 둘째, 체성분 분석 요인 중에서는 1차 체중감량기에는 단백질 이용도(p=.015) 에너지 생성력(p=.017), 전기전도율(p=.003), 비타민 이용도(p=.005)에서 유의한 차이를 보이며 감소한 결과를 보였으며, 2차 체중감량기에서는 전기전도율(p=.038)과 산화스트레스(p=.028)만 유의하게 증가한 결과를 나타냈다. 결론적으로 단기간 무리한 체중감량은 아마추어 복싱선수들의 체성분과 무산소성 운동능력에 부정적인 영향을 미치게 되며, 최적의 컨디셔닝을 발휘하기 위해서는 적정량의 체계적인 체중감량이 필요하다고 사료된다. The purpose of this study was to examine the effect on Electro-chemical screen and anaerobic exercise capacity caused by short-term weight loss in amateur boxing players. Subjects of this study were 10 male university boxing player who conducted to weight loss methods. In 1st weight loss, boxing players took rapid weight loss during 5-7days, In 2nd weight loss, boxing players took weight loss 3kg during 2 weeks. The change of ECS and anaerobic exercise capacity were measured before and after weight loss period. Anaerobic exercise capacity was measured by 1RM of bench press and squat. In addition, using the wing-gate test muscle power and power endurance was evaluated. To find out the changes in ECS, urine and saliva was collected after waking up were analyzed. The results were as follow. First, 1RM of squat(p=.003), peak power(p=.023) and mean power(p=.015) showed significant decrease after 1st weight loss method. However in 2nd weight loss method, no factor of ECS and anaerobic exercise capacity were significantly decreased. Second, total urea(p=.015), urine rH2(p=.017), urine conductivity(p=.003), and utilization of vitamin(p=.005) showed significant decrease after 1st weight loss method. However in 2nd weight loss method, urine conductivity(p=.038) and saliva rH2(p=.028) showed significant increase after weight loss. In conclusion, amateur boxing players need a systematic weight loss to maintain optimal conditioning.