공업용 순 티타늄의 피로거동에서 정류균열에 관한 연구

김동열,김진학,김민건,Kim, Dong-Yeol,Kim, Jin-Hak,Kim, Min-Geon 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.4

To verify the existing theory, non-propagating crack(NPC) does not exist in Ti which fulfills the good conditions for being of NPC, NPC detection in Ti was tried out. Also, the conception of fatigue limit in Ti and a main cause for NPC being were inquired. NPC was detected in both sharp notch root ( $\rho$=0.02mm) and micro pit (diameter = 0.25mm) which held fast to the end under stressing of fatigue limit. Therefore, the existing theory was identified as mistake. But, NPC can not be detected in smooth specimen. This fact would be due to the presumption that NPC is very small or crack does not initiate in smooth specimen. Anyway, the fatigue limit of Ti does not correspond to critical stress of crack initiation but correspond to critical stress of NPC growth. Measurement on the COD of NPC in Ti showed that the crack tip was closed even under the peak stress level at fatigue limit. But, after stress relieving annealing crack tip was opened. Consequently, compressive residual stress which is induced around the crack tip is considered to be the factor causing the NPC being.

한방비만치료임상례중 ${\beta}3$ Adrenergic Receptor 변이율에 대한 고찰 (비만유전자보유유무에 따른 치료효과 비교)

김동열,김길수,김선민,Kim, Dong-Yeol,Kim, Kil-Soo,Kim, Sun-Min 한방비만학회 2002 한방비만학회지 Vol.2 No.1

Purpose & Methods: In order to study obese gene mutation rate in obese Korean patients and to investigate the effect at Chegamuiyiin-tang and electro-lipolysis-acupuncture on obesity treatment. the difference of the reaction to herbal dieting between patients with ${\beta}3$ adrenergic receptor mutation and the patients with wild type ${\beta}3$ adrenergic receptor is observed. Results: Chegamuiyiin-tang and electro-lipolysis-acupuncture treatment are effective on the treatment of obesity in weight reduction. body fat reduction and the circumferences of arm, abdomen, hip and thigh. In the comparison of ${\beta}3$ adrenergic receptor wild type and ${\beta}3$ adrenergic receptor mutation groups, body fat was more reduced with statistical significance, and as for BMI change and body weight change were higher in ${\beta}3$ adrenergic receptor mutation groups with no statistical significance. In the comparison of ${\beta}3$ adrenergic receptor wild type and ${\beta}3$ adrenergic receptor mutation groups among BMI under 25 patients change rate of body weight. BMI, body fact percentage, WHR and body circumference were higher in ${\beta}3$ adrenergic receptor mutation group than in ${\beta}3$ adrenergic receptor wild type group. Conclusion: These results imply that herbal dieting program combined with electro-lipolysis-acupuncture is more effective on reducing body weight and body fat in ${\beta}3$ adrenergic receptor mutation group than wild type group, and that the earlier the treatment is applied, the more effective it is.

황룡사지 출토 금동난간편 검토

김동열,Kim, Dong-Yeol 한국건축역사학회 2014 건축역사연구 Vol.23 No.6

Hwangrong Temple was the center of the Buddhist culture of Silla dynasty. It was built in the 14th year of King Jinheung in Silla dynasty, and completely burnt out when the Mongol Army invaded the Korean peninsula during the reign of King Gojong of Koryeo dynasty. 8-year excavation of the site from 1976 as part of the Gyeongju Tourism Comprehensive Plan revealed many things about the Hwangrongsaji. Recently, a book introduced 'Geumdongnanganpyeon' among relics found in the site, but omitted in the Excavation Report published at that time. Though 'Palgak Geumdongnanganpyeon' has numerical signs 六, 七(six, seven), there was no clear explanation of the signs. Thus, this paper examines it. We can guess, through the remaining iron fragment, that the side of Geumdongnanganpyeon is octagonal, and the width of the side S13 fragment belongs to is about 400mm. The overall form of the face is similar to the Geumdong Palgaktop stored in the Museum of Dongguk University, but, in detail, it is similar to the Zhuanlunzang Pavilion of Longxing Temple and the Sakyamuni Pagoda of Fogong Temple in China. And, numerical signs can be understand to designate the numbers of story and face. The reason why the number might indicate the number of story is that fragments which are presumed to be used for the same purpose contain different measurement values, and the basis of the concept of face can be found in efficiency of manufacturing and manufacturing techniques of artifacts of the time. The two aspects mentioned above cannot be confirmed because of not sufficient relics and related researches. But, the overall form may have been multi-story tower of at least two stories. If more studies in various fields are done in the future, it is expected that the original form will be recovered more accurately.

역사건축물의 진정성 있는 보존방향 연구

김동열,천득염,양병범,Kim, Dong-Yeol,Cheon, Deuk-Youm,Yang, Byeong-Beom 한국건축역사학회 2012 건축역사연구 Vol.21 No.4

Historic buildings are history of human kind and a crystal of culture. Therefore, we have a responsibility and obligation to succeed to descendants. Once such heritage is damaged, it is hard to restore its original form. Thus, various attempts to preserve its value and authenticity have been made internationally. Among these, the international preservation tendency of historic building in terms of materials has been given to the preservation of materials as well as the preservation of appearance. In accordance with such trend, Korea also presented an equivalent general principle, and has managed historic buildings with the separate related instruction. The most general method to preserve historic buildings in Korea is a repair work. Since the foundation of Korea, the repair work tendency has been carried out in the principle of phenomenon change and original form maintenance. But, such tendency focuses on the appearance such as style, structure and trimming method, and there is insufficient consideration on the authentic preservation of materials. Accordingly, this study attempts to examine preservation principle and methods in the repair works, and also to investigate the afforestation condition for the restoration work. And, by suggesting preservation method of authentic materials, it aims to prepare the reference for the future repair work.

황룡사 목탑지 방형대석 검토

김동열,천득염,Kim, Dong-Yeol,Cheon, Deuk-Youm 한국건축역사학회 2015 건축역사연구 Vol.24 No.5

The present study is aimed to reconsider the time of installation and the purpose of the square footstone located at the center of the wooden pagoda in Hwangnyongsa Temple, based on related precedent studies. Precedent studies are divided into two streams of assertions: one is that the square footstone was to support the major pillars at the time of building and the other is that it was installed to store Buddhist reliquaries inside the central foundation stone after the wood pagoda burnt down in the Invasion of Mongol. Summarizing the grounds with which the precedent studies support their assertions, they are the relation with Gaseopbul Yeonjwaseok, the emerging time of the square footstone, repairing work at the level of reconstruction, additional enshrinement of general Buddhist reliquaries and so on. The present study reviewed the key grounds suggested in the previous studies regarding the square footstone. First, it was determined that the square footstone has nothing to do with Gaseopbul Yeonjwaseok, after looking into the timings of appearance, condition and shape in literatures. Rather, it was assumed that Gaseopbul Yeonjwaseok resembles a stone column. Next, the square footstone is assumed to be installed after the 4th year of King Kwangjong's rule because the wood pagoda was lost in fire in the 4th year of Kwangjong's rule and it had been left alone for 68 years until the repair work finished in the 13th year of King Hyunjong. It is assumed that repair works at the level of reconstruction had been twice in total, say, once during King Kyungmun and Hyunjong, respectively. Next, looking into the establishment of the general Buddhist reliquaries and the repair work during King Kyungmun, it was not common then to enshrine additional Buddhist reliquaries when repair work progressed and so there was not an additional enshrinement of Buddhist reliquaries after King Kyungmun. However, it is hard to decide that there was no repair work at the level of reconstruction at that time. Last, we can find a similar case to the square footstone of the wood pagoda in Hwangnyongsa Temple in the copper pagoda in Japanese Yaksasa Temple. In conclusion, it is assumed that the wooden pagoda in Hwangnyongsa Temple was lost to the fire in the 4th year of King Kwangjong's rule and thus the square footstone had been used as Jinho stone to protect Buddhist reliquaries and used as a propping stone for the major pillars after King Hyungjong.

산업보건 교육 후기4 - 앞으로의 30년을 탄탄하게 해 줄 밑거름, 신규직원 교육

김동열,Kim, Dong-Yeol 대한산업보건협회 2017 산업보건 Vol.346 No.-

고혈압, 고지혈증, 퇴행성 관절염을 동반한 비만 환자의 증례보고

김동열,김길수,Kim, Dong-Yeol,Kim, Gil-Su 한방비만학회 2001 한방비만학회지 Vol.1 No.1

비만이란 음식물로 섭취한 칼로리가 신체활동으로 소모된 칼로리보다 많은 경우 잉여 칼로리가 체지방으로 축적된 경우로서 심장병, 고혈압, 동백경화증, 고지혈증, 뇌졸중, 당뇨병, 지방간 등의 유병율을 높여 현대인의 건강을 위협하는 중요한 원인이 된다고 알려지고 있다. 최근 저자는 비만과 고지혈증, 슬관절의 퇴행성 관절염으로 체중증가, 슬관절통, 하지방산통을 주소로 하는 환자 1례를 초저열량식이요법, 한약요법, 운동요법과 한방물리요법을 시행한 결과 체중감소와 체성분의 변화, 혈액학적 변화, 자각증상의 개선의 효과를 보았기에 치료내용과 경과를 보고하는 바이다. Obesity is an excess of body fat frequently resulting from an imbalance between energy intake and expenditure, raises the risk of morbidity from chronic diseases such as hypertension, dyslipidemia, type 2 diabetes, coronary heart disease, stroke, fatty liver and osteoarthritis. Recently we experienced a 51 years old obese woman who was accompanied with hypertension, dyslipidemia and osteoarthritis. Through weight reduction program(very low calorie diet, Chegameuiintang, exercise) during 3 months, total weight loss was 17.0kg, her condition was improved.

일제강점기 구마모토(熊本)농장 화호지장에 관한 연구

김동열,이경훈,신기라,Kim, Dong-Yeol,Lee, Kyoung-Hoon,Shin, Ki-Ra 한국농촌건축학회 2020 농촌건축 : 한국농촌건축학회논문집 Vol.22 No.4

This study focused on the Hwaho farm among Japanese farms that were at the center of rural exploitation during the Japanese colonial period. The contents of the study examined who Kumamoto, the owner of the farm, was, how he entered Chosun and Hwaho-ri, and how much land he owned. And what kind of buildings were in the Hwaho farm during the Japanese colonial period, how they were arranged, and how the space was organized according to the arrangement of buildings. Hwaho farm, the subject of the study, was the farm that managed the most land among Kumamoto's farms. Currently, farmer's housing, Japanese employee housing, warehouses, and medical examination centers remain. In addition to Kumamoto, other Japanese and related buildings remain throughout the town. However, in recent years, a number of houses of enemy property such as Daue House, Sowha Ryokan, and shops are being destroyed without any records or investigations, so this study aims to record academic records of houses of enemy property remaining in Hwaho-ri Village.

사고와 아차사고 경험에 따른 원청과 협력업체 근로자 간 안전문화 인식 비교

김동열,박재희,Kim, Dong Yeol,Park, Jae Hee 한국안전학회 2022 한국안전학회지 Vol.37 No.2

This study analyzes the impact that accidents and near misses have on clients' and contractors' awareness of safety culture. Due to the unique characteristic of employment structure in Korea, the occurrence of accidents differs by company size, which has relevant implications for the establishment of safety culture. Attention has been drawn to the importance of the management of accidents and near misses, with safety awareness acting as a core factor. A positive effect on the prevention of accidents could be achieved by noting the difference in safety awareness between clients and contractors and suggesting an associated suitable safety management system. In support of this study, a survey was distributed to workers in the automobile manufacturing industry (May-August 2020), and data from a total of 574 workers was collected and analyzed, including 399 clients' worksers and 175 contractors' workers. The questionnaire addressed participants' experiences of accidents and near misses as well as 50 items from the Nordic Occupational Safety Climate Questionnaire. Analysis of the responses was conducted using the methods of frequency analysis, Fisher's exact test, t-test, correlation analysis, and regression analysis. The results demonstrated that clients had more experiences with accidents and near misses compared to contractors. Additional differences between clients and contractors were noted in terms of the safety culture factors of learning, communication, and trust. A correlation was observed between the experience of accidents and safety justice management: for clients and contractors who experienced accidents, safety justice management was 9.4 times higher. Furthermore, clients' and contractors' awareness of employees' commitment to safety was determined to be 28.5 times higher in those who had experienced near misses This study concludes that, in order to improve accident prevention through the management of accidents and near misses, clients must focus on overseeing safety justice management and aspects of safety culture factors, while contractors must focus efforts on managing employees' commitment to safety. In further applications, this study could provide baseline data for health and safety activities in terms of the safety culture of clients and contractors. Further study on the establishment of safety culture as related to employment structure is proposed for future research.

초저열량 식이요법과 체감의이인탕의 병행치료가 비만 환자의 신체조성에 미치는 영향

김동열 ( Dong Yeol Kim ),김길수 ( Gil Su Kim ) 한방비만학회 2001 한방비만학회지 Vol.1 No.1

The aim of this study was to the effect of very low calorie diet with Chegameuiintang to treat obese patients. Methods: We have evaluated 54 obese patients during very low calorie diet with Chegameuiintang weight-reducing regime by determining the body composition before and 1 month, 2 months after treatment by Bioelectrical impedence analysis. Results: In the change of body composition by the treatment, mean weight reduction was 11.59kg(15.57% of initial weight), mean weight reduction after 1month was 7.68kg( 10.31% of initial weight), mean weight reduction after 2 months was 3.91kg(5.86% of weight after 1 month). Mean reduction in total fat mass was 8.03kg(29.14% of the initial fat mass) which constitutes 69.28%. Mean reduction in lean body mass was 3.56kg(7.59%). Conclusions: This study has demonstrated that the compound therapy of very low calorie diet and Chegameuiintang(Tiganyiyiren-tang) is the good way of weight reduction, which reduces total fat mass and preserves lean body mass.