롤포밍 공정에서의 성형방법에 따른 직진성 예측

정상화,이상희,김재상,박진완,임성빈 朝鮮大學校 機械技術硏究所 2007 機械技術硏究 Vol.10 No.2

Roll forming process is one of the most widely used processes in the world for forming metals. It can manufacture goods of the uniform cross section throughout the continuous processing. However, analysis of process is very difficult because of the inherent complexity of the process. For this reason, the computer analysis methods such as the FEM(Finite Element Method) and the FDM(Finite Difference Method) are frequently used in roll forming design. In this paper, the under rail composed of upper member, center member and lower member is modeled. Also the flower pattern of the upper member is designed and the roll forming process is simulated. The upper member is designed using constant arc length forming method and constant radius forming method for excellent design. The cold rolled carbon steel sheet(SCP-l) is used in this simulation, and a flow stress equation is set up through the tensile test. Each types are simulated and compared with the longitudinal strain using SHAPE-RF software. In addition. the numerical magnitude of camber and bow is predicted from the results of the simulation.

Clinical study of alopecia areata in children (2007-2011)

( Jae Wan Go ),( Shin Han Kim ),( Sang Yoon Lee ),( Byung In Ro ),( Han Kyoung Cho ) 대한피부과학회 2011 초록집 Vol.49 No.20

Case Report : A Case of Basaloid Follicular Hamartoma

( Jae Wan Go ),( Hwa Eun Oh ),( Han Kyoung Cho ),( Won Hyoung Kang ),( Byung In Ro ) 대한피부과학회 2010 Annals of Dermatology Vol.22 No.2

Basaloid follicular hamartoma (BFH), uncommon rare benign neoplasm connected to the adnexal structures, presents with multiple clinical manifestations that can develop into basal cell carcinoma. BFH may be congenital or acquired, and the congenital form can be further divided into the generalized and unilateral type, and the acquired form may present as localized and solitary lesions. Congenital, generalized BFH is associated with systemic diseases such as alopecia, cystic fibrosis, hypohidrosis, and myasthenia gravis. In contrast, sporadic cases are observed as unilateral or localized lesions. BFH shows thick cords and thin strands of anastomosing basaloid proliferations that arise from hair follicles and are enclosed by loose fibrous stroma. Here, we report a 70-year-old man with an acquired, solitary form of BFH. (Ann Dermatol 22(2) 229~231, 2010)

Basal Cell Nevus Syndrome Showing Several Histologic Types of Basal Cell Carcinoma

Jae Wan Go,Shin Han Kim,Sang Yeop Yi,Han Kyoung Cho 대한피부과학회 2011 Annals of Dermatology Vol.23 No.-

Basal cell nevus syndrome (BCNS), or Gorlin Syndrome, is an autosomal dominant disorder, characterized by multiple developmental abnormalities and associated with germline mutations in the PTCH gene. Patients show multiple and early onset basal cell carcinomas (BCCs) in skin, odontogenic cysts in the jaw, pits on palms and soles, medulloblastoma,hypertelorism, and calcification of the falx cerebri. Clinical features of BCCs in these patients are indistinguishable from ordinary BCCs. However, some patients show variable histologic findings in subtypes of BCCs, and only one case associated with several histologic types of BCCs in the syndrome has been reported in Korea. We present a case of BCNS characterized by multiple BCCs, odontogenic keratocysts, multiple palmar pits, and calcified falx cerebri. Histopathologic findings of BCCs showed several patterns,which were nodular, superficial, and pigmented types. (Ann Dermatol 23(S1) S36∼S40, 2011)

A case of sparganosis in a young woman

( Jae Wan Go ),( Shin Han Kim ),( Sang Yoon Lee ),( Hyun Ok Son ),( Byung In Ro ),( Han Kyoung Cho ) 대한피부과학회 2012 대한피부과학회 학술발표대회집 Vol.64 No.1

Case Reports : Basal Cell Nevus Syndrome Showing Several Histologic Types of Basal Cell Carcinoma

( Jae Wan Go ),( Shin Han Kim ),( Sang Yeop Yi ),( Han Kyoung Cho ) 대한피부과학회 2011 Annals of Dermatology Vol.23 No.1S

Basal cell nevus syndrome (BCNS), or Gorlin Syndrome, is an autosomal dominant disorder, characterized by multiple developmental abnormalities and associated with germline mutations in the PTCH gene. Patients show multiple and early onset basal cell carcinomas (BCCs) in skin, odontogenic cysts in the jaw, pits on palms and soles, medulloblastoma, hypertelorism, and calcification of the falx cerebri. Clinical features of BCCs in these patients are indistinguishable from ordinary BCCs. However, some patients show variable histologic findings in subtypes of BCCs, and only one case associated with several histologic types of BCCs in the syndrome has been reported in Korea. We present a case of BCNS characterized by multiple BCCs, odontogenic keratocysts, multiple palmar pits, and calcified falx cerebri. Histopathologic findings of BCCs showed several patterns, which were nodular, superficial, and pigmented types. (Ann Dermatol 23(S1) S36~S40, 2011)

한국인 가와사키병 환자의 피부병변의 특징에 관한 연구(2006~2010)

고재완 ( Jae Wan Go ),은영민 ( Young Min Eun ),김신한 ( Shin Han Kim ),이상윤 ( Sang Yoon Lee ),정진영 ( Jin Young Jung ),조한경 ( Han Kyoung Cho ) 대한피부과학회 2011 대한피부과학회지 Vol.49 No.9

Background: Kawasaki disease (KD) is an acute inflammation of middle-sized arteries such as the coronary artery. KD is an important disease due to its high mortality rate, which approaches 1~2% without appropriate treatment. Since the various mucocutaneous lesions of KD are related to the dermatologic field, dermatologists should take an interest in this disorder and understand the lesions. Objective: To evaluate the characteristics of cutaneous lesions in Korean patients with KD. Methods: A total of 919 patients with KD were assessed at the department of pediatric cardiology and dermatology, Myongji hospital between January 2006 and December 2010. Results: Of the 919 patients, 566 (61.6%) were diagnosed with typical KD and 353 (38.4%) with atypical KD. KD was most frequent in the 4 year-old group (22.7%), and the ratio of male to female was 1.5:1. Among the mucocutaneous manifestations, erythema of the oropharyngeal mucosa (75.7%) occurred most frequently, followed by polymorphous trunk rash (41.7%), and changes of palms and soles (25.6%). A total of 606 patients (65.9%) with KD had associated diseases as follows: pneumonia (211 patients; 34.8%), pharyngotonsilitis (168 patients; 27.7%), gastroenteritis (132 patients; 21.8%), asthma (15 patients, 2.5%), atopic dermatitis (11 patients, 1.8%). Conclusion: Our study shows that change in the lips or oral cavity is the most common mucocutaneous manifestation in both classic and atypical KD. Also, morbiliform rash is the most common pattern of polymorphous rashes. Interestingly, erythema multiforme-like lesions occupied accounted for a considerable portion of KD cases compared to previous studies. (Korean J Dermatol 2011;49(9):795~800)

얼굴에 피부전이를 보인 심장의 혈관육종

고재완 ( Jae Wan Go ),김신한 ( Shin Han Kim ),이상윤 ( Sang Yoon Lee ),노병인 ( Byung In Ro ),조한경 ( Han Kyoung Cho ) 대한피부과학회 2012 대한피부과학회지 Vol.50 No.2

Angiosarcoma is a rare, aggressive vascular neoplasm of the endothelial cell origin. It is usually seen in male, elderly patients and generally has a poor prognosis due to its high potential for metastasis. They arise at various sites such as skin, soft tissue, heart and great vessels. However, the tumors have a predilection for skin and superficial soft tissue. Most angiosarcomas of the skin arise in the three clinical variant; primary angiosarcoma of the face and scalp in the elderly patients; following lymphedema, and post radiation or trauma. Although, this tumor tend to recur locally and metastasize to the viscera, especially in the lung, but cutaneous metastasis of angiosarcomas from the internal organ are uncommon. Herein, we report a patient with cutaneous metastasis from primary cardiac angiosarcoma in the right atrium. (Korean J Dermatol 2012;50(2):130~133)

손샅에 거울상으로 발생한 보통사마귀

고재완 ( Jae Wan Go ),김신한 ( Shin Han Kim ),조한경 ( Han Kyoung Cho ) 대한피부과학회 2010 大韓皮膚科學會誌 Vol.48 No.9

Common warts are small, benign tumors, and they are usually self limiting hyperkeratotic skin lesions that are infected by human papillomavirus (HPV). Although warts can occur at any age, they are most often seen in children and young adults. It is most commonly found on the acral skin of the hands and fingers, but the lesions may occur anywhere on the skin surface. There are some cases with uncommon forms for the shape and distribution, but there have been no reported cases of common warts occurring on the finger web in a mirror image form in Korea. Herein, we report on an interesting case of common warts that occurred on the right 4th finger web in a mirror image form in a 3-year-old Korean boy. (Korean J Dermatol 2010;48(9):807~809)

고양시 소재 명지병원 피부과 환자의 통계적 고찰(2004~2008)

고재완 ( Jae Wan Go ),조한경 ( Han Kyoung Cho ),강원형 ( Won Hyoung Kang ),노병인 ( Byung In Ro ) 대한피부과학회 2009 대한피부과학회지 Vol.47 No.8

Background: There have been many reports that have focused on the incidence of skin diseases in big cities or provinces. However, there have been no reports concerning the data of a new town such as Goyang City. Objective and Methods: To study the prevalence of common dermatoses in the new town and to compare this with the previous reports, we reviewed the records of 15,064 outpatients who visited the Department of Dermatology at Myongji Hospital from 2004 to 2008, and we statistically analyzed the findings. Results: The study results are summarized as follows: Of the 15,064 outpatients, the total number of male patients was 6,779 (45.0%), and the number of female patients was 8,285 (55.0%). The most frequent age group was the fourth decade followed by the first decade, third decade and fifth decade, and these 4 age groups comprised 63.7% of the total outpatients. The 15 most common dermatoses were found to be viral warts, dermatophytosis, atopic dermatitis, seborrheic dermatitis, pruritus, urticaria, irritant contact dermatitis, herpes zoster, alopecia, allergic contact dermatitis, acne, other eczema, melanocytic nevus, molluscum contagiosum and postinflammatory hyperpigmentation. For the occurrence of dermatoses as disease groups, 1) viral diseases, 2) diseases resulting from fungi and yeasts, 3) atopic dermatitis, eczema and noninfectious immunodeficiency disorders, 4) contact dermatitis and drug eruptions, 5) pruritus and neurocutaneous dermatosis, 6) seborrheic dermatitis, psoriasis, recalcitrant palmoplantar eruptions, pustular dermatitisand erythroderma, 7) erythema and urticaria, 8) Melanocytic nevi and neoplasm, 9) disturbances of pigmentation, and 10) diseases of skin appendages constituted 82.2% of the total. Conclusion: The distinct characteristic of skin diseases of the new town Goyang City showed a high incidence of viral warts and viral skin diseases, as compared to the previous reports. (Korean J Dermatol 2009;47(8):896~903)