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김휘준,배정찬,김도향,Kim, Hwi-Jun,Bae, Jung-Chan,Kim, Do-Hyang 한국분말야금학회 2006 한국분말재료학회지 (KPMI) Vol.13 No.6
본고에서는 고유한 원자구조에 기인한 우수한 특성으로 인해 구조재료 및 기능재료로서 그 활용이 기대되고 있는 벌크 아몰퍼스 소재에 있어 온간압출, 온간압연, 방전 플라즈마 소결(Spark Plasma Sintering)등 과냉각액체온도구간에서의 점성유동을 이용한 고화성형 공정의 최근 기술동향에 대해 간략히 소개했다.
김휘준(Kim Hwi-Jun),박수홍(Park Soo-Hong),오창진(Oh Chang-Jin),정경렬(Chung Kyung-Ryul),배정찬(Bae Jung-Chan) 한국철도학회 1999 한국철도학회 학술발표대회논문집 Vol.- No.-
According to the current trend of single arm type pantograph for high speed train, korean pantograph designed to single arm type will be installed on each power car roof of prototype train of korean very high speed rail configured to 7 cars and have the characteristics of maximum 1% contact loss at 350 ㎞/h speed. This study is devoted to design basically element components of pantograph for korean very high speed train on the basis of kinematic analysis, static analysis and dynamic analysis, followed by making the basic drawings of korean pantograph. This drawings will be complemented through certification tests of prototype pantograph and verification of analysis software.
김휘준(Hwi Jun Kim),심우영(Woo Young Sim),이무형(Mu Hyoung Lee),허충림(Choong Rim Haw),김낙인(Nack In Kim) 대한피부과학회 2002 대한피부과학회지 Vol.40 No.8
Spits nevus is a benign tumor of melanocytic origin. The lesion is a usually asymptomatic, solitary, reddish or pinkish, hairless, dome-shaped, smooth-surfaced, and firm papule or nodule, measuring less than 1.0㎝ in the greatest diameter. In most instances, it is encountered most commonly on the face and extremities in the first two decades of life. The histologic picture of the lesion reveals numerous uniform nests of spindle cells and epithelioid cells with sparse pigmentation in the dermis. We report herein four cases of Spitz nevus with a review of literatures.
조갑감입에 대한 조갑부목법 ( nail splinting ) 의 치료 효과
김휘준(Hwi Jun Kim),하동주(Dong Ju Ha),심우영(Woo Young Sim),이무형(Mu Hyoung Lee),허충림(Choong Rim Haw),김낙인(Nack In Kim) 대한피부과학회 2001 大韓皮膚科學會誌 Vol.39 No.8
N/A Background: Ingrown toenail is one of the most common nail complaints. It occurs chiefly on the great toes, where there is an excessive lateral nail growth into the nail fold, leading to painful irritation, inflammation, infection, and growth of excessive granulation tissue. Many treatments have been described, but these classic treatment modalities may lead to severe damage of the nail fold or to frequent relapses. Objective: We attempted to evaluate the therapeutic effect of nail splinting which is a noninvasive therapy for ingrown toenails. Methods: total of 64 patients(78 lesions) with ingrown toenails were enrolled in the study. The lateral edge of the nail plate including the spicule is splinted with a lengthwise-incised flexible plastic tube. The efficacy of nail splinting for ingrown toenail was assessed by analyzing the degrees of post-treatment pain and a recurrence rate. Results 1. The average age of the patients was 37 years old. There were 38 male patients(47 lesions) and 26 female patients(31 lesions). The right big toe was affected in 27 patients and the left big toe in 23 patients. Fourteen patients had both feet affected at the same time. 2. The pain all cleared in an average 2.3 days of treatment. Other problems such as redness, swelling and granulation tissue gradually decreased as time went by. 3. There was a 7.8% recurrence rate at six months after the procedure. Conclusion: We recommend nail splint as an alternative to traditional treatment for ingrown toenail because it is simple and easy to perform, noninvasive, effective, well tolerated, and does not require any special equipment. (Korean J Dermatol 2001;39(8): 855-860)
남성혈 탈모증 환자의 질병 행동 특성과 삶의 질에 관한 연구
김휘준(Hwi Jun Kim),심우영(Woo Young Sim),송지영(Ji Young Song) 대한피부과학회 2001 대한피부과학회지 Vol.39 No.10
N/A Background: Androgenetic alopecia is a common, genetically predisposed condition among men and women, which commences at any age after puberty. It may significantly affect a variety of psychological and social experiences and the individuals quality of life(QOL). Objective: The purpose of this study was to investigate the impact of androgenetic alopecia on patients illness behavior and quality of life. Methods: A total of 192 male patients with androgenetic alopecia were enrolled and interviewed with structured questionnaire which contained 26 items including personal information, social, psychological questions and the patients knowledge of androgenetic alopecia. Results: 1. The mean age of the patients was 27 years old. The proportion of patients under 30 years old was 79.7%. 2. The mean age of onset in the patients was 24 years old. 3. Using the Norwood's classification, the proportion of type IIIa, type III, type IIIvertex and female pattern was 76.1%. And that of type I and II was 16.1%. 4. The 177 patients (92.2%) showed dissatisfaction about their hair states and 116 patients (60.5%) made efforts to conceal and compensate for their alopecia. The peer teasing about their condition was reported by 134 patients (69.8%). 5. Most unmarried patients (S9.3%) thought that hair loss would erode their chances for romance. 6. Only 33 patients (17.2%) had experiences of professional treatments. Conclusion: This study confirms that androgenetic alopecia has significant impact on the overall QOL of patients. (Korean J Dermatol 2001;39(10): 1094-1099)
김정준,김선겸,김영균,장태석,김휘준,김용진,최현주,Kim, Jungjoon,Kim, Sungyeom,Kim, Youngkyun,Jang, Taesuk,Kim, Hwi-jun,Kim, Youngjin,Choi, Hyunjoo 한국분말재료학회 (*구 분말야금학회) 2021 한국분말재료학회지 (KPMI) Vol.28 No.3
Iron-based amorphous powder attracts increasing attention because of its excellent soft magnetic properties and low iron loss at high frequencies. The development of an insulating layer on the surface of the amorphous soft magnetic powder is important for minimizing the eddy current loss and enhancing the energy efficiency of high-frequency devices by further increasing the electrical resistivity of the cores. In this study, a hybrid insulating coating layer is investigated to compensate for the limitations of monolithic organic or inorganic coating layers. Fe<sub>2</sub>O<sub>3</sub> nanoparticles are added to the flexible silicon-based epoxy layer to prevent magnetic dilution; in addition TiO<sub>2</sub> nanoparticles are added to enhance the mechanical durability of the coating layer. In the hybrid coating layer with optimal composition, the decrease in magnetic permeability and saturation magnetization is suppressed.
뽕잎추출물이 Zucker Rat의 체지방 축적에 미치는 효과
김순경(Soon-Kyung Kim),김선여(Sun-Yeou Kim),김휘준(Hwi-Jun Kim),김애정(Ae-Jung Kim) 한국식품영양과학회 2001 한국식품영양과학회지 Vol.30 No.3
뽕잎의 체지방 축적 억제 효과를 알아보기 위하여 유전적으로 비만이 유도된 obese fa/fa male Zucker rat에 뽕잎 추출물을 경구투여하였다. 그 후 체중의 변화, 사료섭취량, 혈장 중 leptin, insulin, 중성지질과 콜레스테롤 함량과 간, brown adipose tissue 등의 중량을 측정하였다. 3주 동안 뽕잎추출물을 250 mg/kg of body weight의 농도로 처리한 뽕잎투여군의 경우 141%의 체중증가를 보였고, 대조군은 148%의 체중증가를 보여 뽕잎투여군의 체중증가가 7%정도 낮았으나 유의적인 차이는 없었다. 1일당 체중증가량은 대조군 5.18 g, 뽕잎투여군은 4.15 g으로 뽕잎투여군이 대조군에 비해 낮게 나타났다. 1일 사료섭취량은 각각 25.69 g, 25.61 g으로 두군간의 사료섭취량에 차이는 없었다. 사료이용효율은 대조군과 뽕잎투여군간에 유의적인 차이는 없었으나 대조군 0.205, 뽕잎투여군 0.185로 시료를 투여함에 따라 사료이용효율이 저하되는 경향이었다. Leptin과 insulin 함량은 대조군과 뽕잎투여군에서 유의적인 차이가 없었으나, leptin과 insulin 함량은 뽕잎투여군에서 각각 18%, 0.5% 높게 나타났다. 총 콜레스테롤과 중성지질함량은 뽕잎투여군이 대조군에 비하여 유의적으로(p<0.01) 낮게 나타났다. 총 콜레스테롤 중 HDL-콜레스테롤이 차지하는 비율은 뽕잎투여군(대조군의 158%)이 유의적으로(p<0.05) 더 높게 나타났다. 대조군과 뽕잎투여군간의 전체 체중당 간, brown adipose tissue 중량의 비율은 유의적인 차이는 나타나지 않았다. 이상의 결과에서 뽕잎 추출물을 obese fa/fa male Zucker rat에 체중당 250 mg의 용량으로 3주간 경구투여함으로써 대조군에 비하여 10% 정도의 체중감소를 보였고 사료섭취효율의 저하 효과도 관찰되었다. 또한 leptin의 함량은 증가되었고, 중성지질과 총 콜레스테롤은 유의적으로 감소되었고, 총 콜레스테롤 중 HDL-콜레스테롤이 차지하는 비가 높아짐을 확인할 수 있었다. This study was conducted to investigate whether the obesity of obese fa/fa male Zucker rats can be ameliorated by mulberry leaves. There was no significant difference between mulberry treatment group and control group in body weight gain and food efficiency ratio. It also showed decreases of plasma triglyceride and totalcholesterol concentration compared to the control group. But there was no change in plasma leptin concentration between the control and mulberry treatment groups. These results suggest that mulberry leaves reduce serum lipid levels, but do not effect the plasma leptin concentration.