‘Zero Caffeine Swordbean Coffee’ Kim Ji Yong’s Founding Story

Ji Yong Kim(김지용) 한국식품영양과학회 2020 한국식품영양과학회 학술대회발표집 Vol.2020 No.10

골격성 3급 부정교합자의 악교정 수술 후 설골 위치와 상기도 크기의 변화

김지용,안제영,임재형,허종기,박광호,Kim, Ji-Yong,Ahn, Je-Young,Lim, Jae-Hyung,Huh, Jong-Ki,Park, Kwang-Ho 대한악안면성형재건외과학회 2006 Maxillofacial Plastic Reconstructive Surgery Vol.28 No.1

After orthognathic surgery in skeletal class III patients, the hyoid bone position and the upper airway dimension could be changed due to mandibular setback. There has been many studies about airway dimension of the patients with skeletal class II malocclusion or obstructive sleep apnea. but not with skeletal class III. The purpose of this study was to examine the change of position of the hyoid bone and the consequent change of airway space as the result of retrusion of mandible after orthognathic surgery in skeletal Cl III malocclusion patients. It is also to apply this results in predicting, diagnosing and treating the subsequent obstructive sleep apnea. Forty patients who were diagnosed as skeletal Cl III maloccusion, received orthoganthic surgery of both jaws including mandibular setback, and were followed up post-operatively for more than 6 months were selected. There were 10 male patients 30 female patients. The preoperative and postoperative lateral cephalograms were traced and the distances and angles were measured. The nasopharyngeal space increased postoperatively while the oropharyngeal space decreased. Except for the change of oroparyngeal space, the changes in male patients were greater than female patients. The hyoid bone moved in the posterior-inferior direction, and the change was greater in males than in females. If the postoperative mandibular setback is great, then a significant decrease of airway space and posterior and inferior movement of the hyoid bone were observed. This can result in symptoms related to obstructive sleep apnea. This result should be considered in the diagnosis and treatment planning of orthognathic surgery patients.

골격성 3급 부정교합자의 악교정 수술 후 설골 위치와 상기도 크기의 변화

김지용,안제영,임재형,허종기,박광호,Kim, Ji-Yong,Ahn, Je-Young,Lim, Jae-Hyung,Huh, Jong-Ki,Park, Kwang-Ho 대한악안면성형재건외과학회 2006 Maxillofacial Plastic Reconstructive Surgery Vol.28 No.2

After orthognathic surgery in skeletal class III patients, the hyoid bone position and the upper airway dimension could be changed due to mandibular setback. There has been many studies about airway dimension of the patients with skeletal class II malocclusion or obstructive sleep apnea. but not with skeletal class III. The purpose of this study was to examine the change of position of the hyoid bone and the consequent change of airway space as the result of retrusion of mandible after orthognathic surgery in skeletal Cl III malocclusion patients. It is also to apply this results in predicting, diagnosing and treating the subsequent obstructive sleep apnea. Forty patients who were diagnosed as skeletal Cl III maloccusion, received orthoganthic surgery of both jaws including mandibular setback, and were followed up post-operatively for more than 6 months were selected. There were 10 male patients 30 female patients. The preoperative and postoperative lateral cephalograms were traced and the distances and angles were measured. The nasopharyngeal space increased postoperatively while the oropharyngeal space decreased. Except for the change of oroparyngeal space, the changes in male patients were greater than female patients. The hyoid bone moved in the posterior-inferior direction, and the change was greater in males than in females. If the postoperative mandibular setback is great, then a significant decrease of airway space and posterior and inferior movement of the hyoid bone were observed. This can result in symptoms related to obstructive sleep apnea. This result should be considered in the diagnosis and treatment planning of orthognathic surgery patients.

철강공장 근로자를 대상으로 살펴본 소음성 난청 진단기준에 관한 조사

김지용,임현술,정해관,문옥륜,Kim, Ji-Yong,Lim, Hyun-Sul,Cheong, Hae-Kwan,Moon, Ok-Ryun 대한예방의학회 1993 예방의학회지 Vol.26 No.3

This study was carried out to evaluate diagnostic criteria of noise-induced hearing loss (NIHL) among-workers in an iron foundry. Of 1,093 workers under the observation of noise-specific health examination, 184 workers were selected by way of first and second screening audiometric examination. A questionnaire survey, otological examinations, Rinne test and audiometric test were performed and the results were as follows ; The degree of hearing impairment in the left ear was more severe than in the right ear (p<0.05). The difference between hearing threshold of the first and the second hearing test at 1,000 Hz was about 5 dB with a narrow range of deviations while the difference at 4,000 Hz was about -7 dB with a wide range. Of the total study workers, 84.8% were tested within 15 hours away from noise exposure, and the rest after 16 hours. This study has identified that mean hearing loss at 4,000 Hz showed a significant statistical difference among the two study groups while mean hearing loss by 4-divided classification did not. The same phenomena were observed between the group with and without tinnitus and between the group with and without difficulty in hearing (p<0.05). Among 184 workers, 10 workers (5.4%) diagnosed as NIHL by old diagnostic criteria in contrast to 150 workers diagnosed as NIHL by the new diagnostic criteria. There was a significant difference between the two groups in the average hearing loss at 4,000 Hz and 4-divided classification (p<0.01), but there were no significant differences in age, the duration of employment, blood pressure and the duration wearing the personal hearing protector (p>0.05). If we apply Early Loss Index (ELI) method, some workers in younger age group diagnosed as NIHL by the new diagnostic criteria were fallen into within the normal range. In the mean time older age group show reverse results in contrast to the above finding. It is too early to confirm the value of the usage of the new diagnostic criteria in hearing examination. Further study is called for to verify the value of this criteria.

TDEAT와 $\textrm{NH}_3$ 예비혼합 처리가 MOCVD TiN형성에 미치는 영향

김지용,이재갑,박상준,신현국,Kim, Ji-Yong,Lee, Jae-Gap,Park, Sang-Jun,Sin, Hyeon-Guk 한국재료학회 1997 한국재료학회지 Vol.7 No.7

TDEAT(TI[N(C$_{2}$H$_{5}$)$_{2}$]$_{4}$)와 NH$_{3}$반응기체를 이용하여 MOCVD(Metal Organic Chemical Vapor Deposition)TiN 박막을 형성하였다. 반응기체들은 chamber내에 주입하기 전에 적절한 기상반응을 유도시켜 주었으며, TiN박막 형성에 미치는 예비혼합 효과를 관찰하였다. 두 반응기체의 예비혼합을 이용하여 낮은 탄소의 함유와 함께 -800$\mu$Ωㆍcm의 비교적 낮은 비저항을 나타내었다. 또한 NH$_{3}$의 유량 증가에 따라 도포성이 상당히 증가되고 있는데 이같은 도포성 향상 효과는 기상반응에 의하여 형성되는 중간상의 낮은 흡\ulcorner계수에 기인하는 것으로 여겨진다. QMS(Quadruple Mass Spectrometer)분석을 이용하여 두가지 경쟁적 반응을 포함한 전체 반응식을 제시하였다. TDEAT/NH$_{3}$혼합증착원의 경우 particle이 관찰\ulcorner지 않았으며 이것은 기상반응의 정도를 효과적으로 조절한데 기인하는 것으로 여겨진다. 결과적으로 반응기체의 예비혼합은 막질 및 도포성 개선과 함께 particle생성억제에 매우 효율적인 방법임을 알 수 있었다.다.

한국 대학의 공동체 문화

김지용,Kim, Ji-Yong 한국대학교육협의회 1991 大學敎育 Vol.54 No.-

내부구조재를 가진 중공형 접합판재의 전단가공특성에서 틈새효과에 관한 연구

김지용,정완진,김종호,Kim, Ji-yong,Jung, Wan-jin,Kima, Jong-ho 한국금형공학회 2008 한국금형공학회지 Vol.2 No.1

While recent industrial structure is various, it is small quantity batch production structure, and products requiring of various functions are increasing. In order to improve the quality of the sheared surface in cutting of inner structure bonded sheet metal the cut-off operation is mainly investigated, which is the typical shearing process in sheet metal forming technology. The sandwich sheet metals considered have inner structure which is constructed in the form of crimped expanded metal and woven metal. The inner structure is bonded between solid sheet by resistance welding or adhesive bonding. The shearing process is visualized by the computer vision system installed in front of the cut-off die and the sheared surface is measured and quantitatively compared with the help of the optical microscope after cut-off operation. From test results we found that the influence of sheared position can be observed and explained clearly and this result can be utilized to get the better sheared surface.

Tank Model 매개변수의 민감도 분석

김지용,정상옥,Kim Ji-Yong,Chung Sang-Ok 한국관개배수위원회 2001 한국관개배수논문집 Vol.8 No.2

This study was performed to analyse the sensitivity of the Tank model parameters . First of all, the proper values of the parameters which have the least simulation error to the observed data, were estimated. These were used as the standard values which a

작업조건이 출산결과에 미치는 영향: 전향적 코호트연구

김지용,정진주,고경심,조정진,Kim, Ji-Yong,Chung, Jin-Joo,Ko, Kyung-Sim,Cho, Jung-Jin 대한예방의학회 2002 예방의학회지 Vol.35 No.3

Objectives : To evaluate the association between working conditions and adverse pregnancy outcomes in Korea. Methods : We obtained data on health history, lifestyle, housework and Working conditions, such as shift work, hours standing, working time, job demand, lifting at work and at home, between August and September 2000, from self-reported questionnaires. A group of 344, occupationally active, pregnant women from 51 industries were studied. Of the women studied, 328 women were further interviewed by telephone between November 2000 and September 2001. Result : Compared with daytime work, shift work increased the risk for preform birth (an adjusted risk ratio of 2.74, 95% CI=1.02-2.62) and low birth weight (an adjusted risk ratio of 2.74,95% CI=1.02-2.02). A significantly increased risk was found for prolonged standing, with an adjusted risk ratio of preform births of 6.80 (95% CI=2.01-23.0). There were no significant differences in the incidence of spontaneous abortion between the occupational working conditions, with the enception of a previous history of spontaneous abortion. Conclusion : These findings suggest that maternal working conditions, such as shift work and prolonged standing, contribute significantly to preterm birth and low birth weight.

모 철강업체의 열연아연도금강판 공정의 작업환경 개선에 따른 납의 환경폭로에 대한 평가

김지용,정회경,임현술,Kim, Ji-Yong,Jeong, Hoe-Gyeong,Im, Hyeon-Sul 대한산업보건협회 1995 산업보건 Vol.88 No.-