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강-소성 유한요소법의 역추적기법을 이용한 정밀정형 쉘 노우징 부품의 성형공정 개발과 실험적 증명
김상현,이진희,임학진,Kim, Sang-Hyeon,Lee, Jin-Hui,Im, Hak-Jin 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.7
A preform is designed by the backward tracing scheme of the rigid-plastic finite element method(FEM) for net-shape shell nosing components without machining after forming. The current process of the shell nosing requires cost-consuming machining to produce final products. Here, the backward tracing scheme of the rigid-plastic FEM, a novel method for preform design of metal forming processes, derives a sound preform for net-shape shell nosing product. The current process is simulated by the rigid-plastic finite element analysis to check the metal flow involved in the forming with a trial preform and its modified preform. The two preforms are found to be inadequate for net-shape shell nosing product. The first application of the back ward tracing scheme derives a preform producing a not-shape shell nosing product. The first application of the backward tracing scheme derives a preform producing a net-shape product numerically, but it is difficult to be formed economically as a preform. Thus an improved preform is designed by the badkward tracing scheme, which is suitable for net-shape manufacturing of the shell nosing components in view of economy of production and forming characteristics of the product. The preform in the current process and a modified preform are confirmed by a series of experiments and the results give the same deformation with the numerical ones. Finally the newly designed preform by the FEM was experimentally proved to be adequate in obtaining net-shape products.
선반 가공조건에 따른 경화처리된 A17075-T6 소재의 가공특성 변화에 관한 연구
이희덕,김정석,정지훈,임학진,Lee, Hee-Deok,Kim, Jeong-Suk,Jeong, Ji-Hoon,Im, Hak-Jin 한국생산제조학회 2012 한국생산제조학회지 Vol.21 No.1
The cutting characteristics of hardened aluminum alloy A17075-T6 were investigated during turning processing. Under variation conditions of cutting speed, depth of cut, and feed rate, the characteristics of cutting force, surface roughness, and machined texture were investigated. Surface roughness became worse in proportion to the increase of the feed rate. The thickness of material alteration layer which is derived from the effect of cutting force was the biggest when feed rate 0.148mm/rev. This research confirmed that the deformed layer is dominantly dependent on the variation of feed rate.
식도이완불능증 환자의 연하장애에 대한 분심기음과 전침의 복합 한의치료 1례 : 증례보고
조임학,이찬,강희경,허기윤,김민화,권정남,박성하,윤영주,이인,최준용,한창우,홍진우,김소연,Cho, Im-hak,Lee, Chan,Kang, Hee-kyung,Heo, Gi-yoon,Kim, Min-hwa,Kwon, Jung-nam,Park, Seong-ha,Yun, Young-ju,Lee, In,Choi, Jun-yong,Han, Chang-woo,Hong 대한한방내과학회 2021 大韓韓方內科學會誌 Vol.42 No.3
This study presents the case of a 73-year-old Korean male with dysphagia caused by achalasia and aimed to assess the effectiveness of Korean medical treatment. The outpatient was treated with acupuncture, electroacupuncture, and herbal medicine (Bunsimgieum-gami, Gyejigayonggolmolyeo-tang, Bangpungtongsung-san) for about 6 months. We evaluated the patient's symptoms whenever he visited the clinic. The patient improved significantly after Korean medical treatment. In particular, dysphagia disappeared after herbal medicine treatment. This case report suggests that Korean medical treatment could be effective in treating achalasia. Further studies are needed.
임상연구에서 사용되고 있는 NRS에 대한 분석 : 무작위대조군연구를 중심으로
이찬,조임학,허기윤,강희경,김민화,한창우,김소연,최준용,박성하,윤영주,홍진우,권정남,이인,Lee, Chan,Cho, Im-hak,Heo, Gi-yoon,Kang, Hee-kyung,Kim, Min-hwa,Han, Chang-woo,Kim, So-yeon,Choi, Jun-yong,Park, Seong-ha,Yun, Young-ju,Hong, Jin-woo 대한한방내과학회 2021 大韓韓方內科學會誌 Vol.42 No.4
Objectives: The purpose of this study was to review the status of numeric rating scale (NRS) usage and suggest the potential for use in multicenter retrospective studies of various diseases. Methods: Articles published from 2011 to 2021 that used the keywords "NRS", "Multi-center", and "RCT" were identified in foreign databases, including EMBASE, PubMed, CENTRAL. The articles were analyzed according to their use of "NRS" by symptoms and by disease group using the major classifications of the Korean Standard Classification of Diseases (KCD-7). Results: Classification by symptom in a total of 288 articles illustrates that the NRS was not only commonly used in pain evaluation but also for non-pain symptoms. In usage with non-pain symptoms, chief complaint of patients was the most common at 79%, and other factors included treatment satisfaction, evaluation of daily life, and sleep quality. In disease classification according to the KCD-7, the NRS was commonly used in connection with musculoskeletal and connective tissue diseases but was also utilized in various other disease groups. Conclusions: This study confirms usage of the NRS in multi-center RCTs, as the NRS was widely used in all types of diseases and symptoms. Considering the result and the advantages of the NRS, it is recommended for use as a daily evaluation tool for the collection of common data in multicenter retrospective studies.
로바젯정으로 유발된 간수치 상승 환자의 한방 치료 증례 보고
강희경,조임학,이찬,허기윤,김민화,권정남,김소연,박성하,윤영주,이인,최준용,홍진우,한창우,Kang, Hee-kyung,Cho, Im-hak,Lee, Chan,Heo, Gi-yoon,Kim, Min-hwa,Kwon, Jung-nam,Kim, So-yeon,Park, Seong-ha,Yun, Young-ju,Lee, In,Choi, Jun-yong,Hong, 대한한방내과학회 2021 大韓韓方內科學會誌 Vol.42 No.5
Objective: This study evaluated a clinical case of a patient with Rovazet-induced abnormal liver function treated with intradermal acupuncture. Method: A 59-year-old woman with abnormal liver function induced by Rovazet ceased taking the drug and instead received intradermal acupuncture treatment. After 15 days, clinical symptoms and laboratory test results were evaluated. Results: Aspartate aminotransferase and alanine aminotransferase levels decreased, and clinical symptoms such as nausea and fatigue improved after treatment with intradermal acupuncture and cessation of the Rovazet. Conclusion: This study meaningfully examined a clinical case of a patient with abnormal liver function induced by a lipid-lowering agent, which is uncommon in Korea. Unfortunately, the lack of clear evidence and the use of only one case are limitations of the study.
뇌혈관질환 환자에 대한 청심연자탕(淸心連子湯), 도담탕(導痰湯), 혈부축어탕(血府逐瘀湯), 보신익뇌탕(補腎益腦湯)의 간기능과 신기능 안전성 평가 : 후향적 연구
김민화,조임학,남이랑,김마리아,구기범,이세연,권정남,이인,홍진우,윤영주,김소연,한창우,박소정,최준용,신현규,Min-hwa Kim,Im-hak Cho,I-rang Nam,Maria Kim,Ki-beom Ku,Se-yeon Lee,Jung-nam Kwon,In Lee,Jin-woo Hong,Young-ju Yun,So-yeon Kim,Chang-woo Han 대한한방내과학회 2023 大韓韓方內科學會誌 Vol.44 No.3
Objectives: As Korea transitions into an aging society, the incidence of cerebrovascular disease is expected to increase. Herbal medicine is commonly used in Oriental medicine to treat cerebrovascular disease. However, there is insufficient clinical evidence to actively support the safety of herbal medicine in clinical practice. Therefore, the aim of this study was to determine the toxicity and safety of four herbal medicines (Cheongsimyeonja-tang, Dodam-tang, Hyeolbuchukso-tang, and Boshiniknai-tang) in patients with cerebrovascular disease. Methods: This study used electronic medical records to analyze patients admitted to an oriental medicine hospital from April 1, 2017, to December 31, 2020. Liver and renal function values at the time of admission and discharge were compared. Results: A total of 25 patients were included in this study. We found no significant differences in various variables, such as complete blood count, liver-renal function test, and urine, before and after the administration of the four herbal medicines. Additionally, no significant adverse events related to herbal medicine were observed. Conclusions: This study confirmed the safety of the four herbal medicines in patients with cerebrovascular disease who were hospitalized in a single Oriental medicine hospital.