건강한 성인과 성인편마비의 표면열 적용시 사지에서의 동통역치 변화에 관한 연구

김중휘,홍도선,이정원 한국전문물리치료학회 1996 한국전문물리치료학회지 Vol.3 No.2

수입 외국산 모발세정용 화장품의 중금속 농도에 관한 연구

문정아,문덕환,박명희,안진홍,김종은,손병철,김대환,이창희,김휘동,이채언 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.5

Objective : For the purpose of preparing the fundamental data and preventing the health impairment due yo heavy metals in hair cleaner. Methods and Material : The author determined the concentration of heavy metals(Fb, fn, Cr, Ni and Cu) in hair cleaner with flameless atomic absorption spectrophotometer. Results : The results were as follows : 1. The mean concentration of heavy metals in total hair cleaner were 0.046㎍/g for Pt, 0.O67㎍/g for Mn, 0.069㎍/g for Cr, 0.046㎍/g for Ni, and 0.022㎍/g for Cu, respectively. 2. There was not statistically significant difference to mean concentrations of each heavy metal in hair cleaner by producing nation. 3. The highest mean concentration of each heavy metal in hair cleaner by type of use were 0.140㎍/g for Mn in sensitive hair cleaner(p<0.05), 0.053㎍/g for Cu in others products(p<0.01). 4. The mean concentration of heavy metals in hair cleaner by type of hair cleaner were high at 0.O54㎍/g for Pb in shampoo products(p<0.O5), 0.120㎍/g for Cr and 0.06㎍/g for Cu in combination products(p<0.01). 5. The mean concentration of heavy metals in hair cleaner by acidity were high at 0.056㎍/g for Pb, 0.124㎍/g for Cr, and 0.032㎍/g for Cu in alkali products (p<0.05). 6. Correlation coefficient of heavy metal concentration in hair cleaner were 0.175 for Pb and Cr, 0.165 for Pb and Mn, 0.824 for Cr, and Mn, 0.189 for Cr, and Ni, 0.406 for Cr, and Cu, 0.197 for Mn and Ni, and 0.375 for Mn and Cu(p<0.05). 7. Exposure amount of heavy metals per when we used lOg of hair cleaner (onetime using amount) were 0.46㎍ for Pb, 0.67㎍ for Mn, 0.69㎍ for Cr, 0.46㎍ for Ni, and 0.22㎍ for Cu, respectively. Conclusion : As above results, there was very low level concentration of heavy metal in hair cleaner but we are using the hair cleaner everyday, therefore we can exposed to heavy metals as cronic exposure so the author suggest to prepare the program of preventing the health impairment due to heavy metals.

부산지역 조선업 협력업체 근로자들의 산업재해 관련요인

신성환,김대환,안진홍,김휘동,김정호,강현만,이종태 大韓産業醫學會 2008 대한직업환경의학회지 Vol.20 No.1

목적: 조선업 협력업체의 재해율 및 재해자 특성을 파악하고,이들의 생활습관요인 및 사회 인구학적 요인을 포함하는 개인적 특성과,작업과 관련된 직업적 특성을 조사하여 산업재해 관련요인을 규명하고자 하였다. 방법: 2007년 5윌부터 7월까지,산업재해예방 안전교육을 실시한 부산지역 64개 조선업 협력 사업장의 생산직 근로자 1, 651명을 대상으로 개인적 특성,직업적 특성,산업재해 특성에 관해 자기기입식으로 설문조사를 실시하였다. 산업재해는 최근 5년 이내에 1회 이상 발생한 경우로 한정하였고,재해로 인한 요양일수에 따라 Group I(요양일수 4일 미만). Group II(요양일수 4일 이상). Group III (Group I+Group II)로 구분하여 재해 경험이 없는 군과 비교하였다. 통계적 유의성이 있는 요인들을 파악한 후 다중 로지스틱 회귀분석을 시행하여 보정된 교차비를 산출하였다. 결과: 본 연구에서의 재해율은 2006년을 기준으로 전체 재해자가 125명, 7.57%, 4일 이상의 요양기간을 필요로 하는 재해자가 75명, 4.30%였다. 산업재해 발생건수는 취부 작업에서 가장 많이 발생하는 것으로 나타났고,산업재해보상보험 처리비율은 4일 이상 요양을 한 재해자 중 30%였다. 산업재해와의 관련성에 있어서 Group I에서는 대졸이상의 교육수준(OR 2.78), 높은 피로도(OR 2.18), Group II에서는 5시간미만의 수면시간(OR 3.47), 높은 피로도(OR 2.79), 주 56시간 이상의 작업시간(OR 1.53), Group III에서는 대졸이상의 교육수준(OR 1.78), 5시간미만의 수면시간(OR 2.98), 내쁜 수면의 질(OR 1. 65), 높은 피로도(OR 2.58)가 통계적 유의성이 있었다. 결론: 조선업 협력업체 근로자들을 대상으로 실시한 본 연구를 통하여 5시간 미만의 수면시간,나쁜 수면의 질,높은 피로도,주 56시간 이상의 작업시간,대졸이상의 교육수준이 산업재해 관련요인으로 밝혀졌다. 따라서 이들 사업장의 산업재해발생과 관련해서 개인적 생활습관, 작업 환경 및 작업 조건을 개선하는 등의 산업 재해 관련요인 관리가 중요할 것으로 판단된다. Objective: This study was conducted to evaluate both personal and work-related factors associated with occupational injuries of ship-building supply workers in Busan, Korea. Methods: A self-administered, questionnaire survey, asking both personal and work-related factors associated with occupational injuries, was administered to 1,651 workers from 64 different ship-building supply companies in Busan, Korea. All occupational injuries had occurred within the previous 5 years. The workers were divided into three sub-groups: Group I, under 4 day-sick leave, Group II, 4 day-sick leave and over, and Group III, which consisted of both Groups I and II. The statistical significance of the factors associated with occupational injuries underwent cross tabulation analysis for each group. Afterwards, the relationships between the factors which had statistical significance and the occurrence of occupational injuries were analyzed through multiple logistic regression by using the SPSS 12.0 K program. Results: The prevalence of occupational injuries was 4.30% in Group II and 7.57% in Group III. The work activities which had the most frequent occupational injuries were 'Fit-up' and 'Welding', and 30.0% of injured workers were covered by workers' compensation in Group II. According to the multiple logistic regression analysis results, the factors which had statistical significance in occupational injury occurrence were education level above college (OR 2.78) and high level of fatigue (OR 2.18) in Group I, sleeping less than 5 hours per day (OR 3.47), high level of fatigue (OR 2.79) and working over 56 hours per week (OR 1.53) in Group II, and education level above college (OR 1.78), sleeping less than 5 hours per day (OR 2.98), poor sleep quality (OR 1.65) and high level of fatigue (OR 2.58) in Group III. Conclusion: This study demonstrated that several factors of ship-building supply workers such as sleep hours, sleep quality, fatigue, working hours, and educational level exerted a statistical effect on the occurrence of occupational injuries, In association with occupational injuries occurrence, these factors need to be controlled by proper methods such as effective safety education, work condition modification, and life style management.

연구원 활동 : 발표논문요약 < 금속공학분야 >

(Jong Hwi Hong),(Young Hwan Hong),(Se Hyun Ko) 고려대학교 공학기술연구소 1994 공학기술연구소보 Vol.1 No.-

현장시험을 통한 콘알파 공법의 지반개량 평가

홍종욱(Jong-Ouk Hong),Jin Yongguo,박은형(Eun-Hyung Park),이종휘(Jong-Hwi Lee),김연승(Yeon-Seung Kim),천병식(Byung-Sik Chun) 한국지반환경공학회 2012 한국지반환경공학회 학술발표회논문집 Vol.2012 No.9

Is the Present Power of Capsule Endoscopy Strong Enough?: Its Ability to Detect Normally Positioned Duodenal Papilla

Hwi Kong,Yong Sik Kim,Jong Jin Hyun,Young Jig Cho,Bo Ra Keum,Yoon Tae Jeen,Hong Sik Lee,Hoon Jai Chun,Soon Ho Um,Sang Woo Lee,Jai Hyun Choi,Chang Duck Kim,Ho Sang Ryu,Jin Hai 대한내과학회 2005 대한내과학회 추계학술대회 Vol.2005 No.1

Occurrence patterns of major moth by region in soybeans (2022)

Hwi Jong Yi,Rameswor Maharjan,Seo yeon Hong,YoungNam Yoon,YunWoo Jang 한국응용곤충학회 2022 한국응용곤충학회 학술대회논문집 Vol.2022 No.10

Nb 첨가 고장력 저합금강의 냉연 후 열처리에 따른 기계적 성질

홍종휘,오인석 고려대학교 공학기술연구소 1984 고려대학교 생산기술연구소 생기연논문집 Vol.19 No.1

Mechanical properties of cold rolled 0.12C-1.36Mn-0.08Nb HSLA steel have been studied after annealing followed by water quenching. The degrees of cold work were 25% and 50%, and the annealing temperatures were in the range of 500-780℃. By increasing the heat treating temperature, strength of the specimens has increased at first stage and then decreased. After annealing treatment at the temperature range of 600-720℃, 50% cold worked specimens have shown lower strength than the 25% cold worked specimens. This strength reversion is caused by more accelerated growth of the precipitates in the ferrite matrix in the specimens subjected to the heavier cold work. When compared the specimens which heat treated at different temperatures in the intercritical temperature (α+γ) range, the specimens heat treated at lower temperature (720℃) have shown higher strength than the specimens heat treated at higher temperature (780℃). Martensite volume fraction of the former specimens is lower but it contains more fine precipitates than the latter specimens. Therefore it is concluded that the strength of intercritically annealed specimens is strongly influenced by the distribution of the fine precipitates than the martensite volume fraction. The fine precipitates are analyzed to be the NbC by the electron diffraction pattern.

아르니코형 주조자석에서 결정조직에 미치는 알미늄과 티탄의 영향

홍종휘 대한금속재료학회(대한금속학회) 1963 대한금속·재료학회지 Vol.1 No.3

Magnetic property in Alnico V type permanent magnet is improved by adding special elemets, heat treatment in magnetic field and producing columnar structres. This experiment is a part of an investigation into methods of producing columnar structure in Fe-Ni-Al alloy of high Co content, with consequent improvement in their magnetic properties. Alnico V type alloys are coarse grained and columnar growth is readily induced by casting into suitably chilled molds. As increasing amounts of Ti are added to this type of alloy, the grain size becomes progressively smaller, and the production of columnar castings more difficult. Consequently, high coercivity alloys with the composition 14.5% Ni, 28∼35% Co, 4.5% Cu, 7% Al and 5% Ti are extremly fine grained and, when chill cast, form only very small columnar crystals near the chilled face. The occurrence of fine equi-axed crystals in Fe-Ni-Co-Cu-Al-Ti alloys is a function of Al and Ti contents and not Ti contents alone.

Ni-Ti 형상기억합금의 상변능에 미치는 외부응력의 영향

홍종휘,성윤막,지광구,갑명철 대한금속재료학회(대한금속학회) 1988 대한금속·재료학회지 Vol.26 No.8

The effect of external stress on the phase transformation behavior of annealed and aged Ni-Ti alloys has been studied by the tensile test and the measurement of electrical resistance. Martensitic (M_s) and austenitic transformation starting temperatures (A_s) increased gradually with increasing stess up to 129 MPa and increased rapidly at a rate of 0.2℃/MPa above this stress level. However, incommensurate (T'_R) and commensurate phase transformation starting temperatures (T_R) increased very slowly at a rate of 0.06℃/MPa with the increasing stress. Martensitic transformation temperature range, ΔT(M_s∼M_f), and the stress at which ΔT was kept constant were larger for the aged specimen than for the annealed specimen. The stress at which the strain accompanied by incommensurate and commensurate phase transformation began to decrease (ε-1c) was higher for the annealed specimen than for the aged specimen. these facts imply that the incommensurate and commensurate phases are more stable in the annealed specimen than in the aged specimen. While the residual stress (ε_p) in the annealed specimen remained low regardless of the stress level, ε_p in the aged specimen began to increase rapidly at 240 MPa. This means that slip deformation is more difficult for the annealed specimen than for the aged specimen.