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아토피 피부염 환자에서의 혈중 호산구 및 혈청 IgE 검사에 관한 연구
강동근(Dong Geun Kang),박천욱(Chun Wook Park),이철헌(Cheol Heon Lee) 대한피부과학회 1992 大韓皮膚科學會誌 Vol.30 No.1
The peripheral blood eosinophil and serum IgE level in 53 patients with atopic dermatitis (AD) were measured. The patients were divided into 2 groups by severity(mild and severe grous) and into 3 groups by the associated respiratory atopic deseases and/or their family history : respiratory group(patient, with both AD and respiratory atopy), family history group (patient with both AD and family history of respiratory atopy), and atopic group(patient with neither respiratory atopy nor family history of respiratorv atopy). We designed to study which factors are important in the elevation of serum IgE and peripheral blood eosinophil level in AD, and to know possible relationships between the serum eosinophil and IgE level and the several groups of AD. The results are as follows : 1. Peripheral eosinophil counts were higher in severe group(224.8/mm) than in mild group (180.0/mm)(p<0.05). 2. Peripheral eosinophil counts were 220.0/mm in atopic group, l65.0/mm in family history group, and 332.4/mm in respiratory group, but there was no stitistically significant difference among 3 groups. This suggests that concomitant respiatitiry atopy or a family history of respiratory atopy is not an important factor in the elvation of peripheral blood eosinophil counts in AD. 3. Serum IgE was higher in severe group(443.2IU/ml) than in mild group(231.5IU/ml)(p<0.05). 4. Serum IgE level in respiratory group(754.6IU/ml) were signifiiantlly higher than in atopic (286.6IU/ml) or family history group(342.0IU/ml)(p<0,01). But there was no significant. difference between family and atopic group. This result suggests that concomittent respiratory atopy is a potential factor in elevation of serurn Igi in AD. 5. Slightly high correlation between peripheral blood and IgE level appeared in all 53 patients (r=0.434) and severe group(r=0.480). But, respiratory group(r=0.060), family history group(r=0.111) and atopic group(r=0.202) showed poor relationships. (Kor J Dermatol 1992; 30(1): 51-56)
강동근(Dong Geun Kang),김광수(Kwang Soo Kim),조희진(Hee Jin Cho),안규중(Kyu Joong Ahn),이철헌(Cheol Heon Lee) 대한피부과학회 1990 대한피부과학회지 Vol.28 No.2
A case of contact dermatitis due to herb onintment is described in a 24 year-old female patient. After topical application of herb ointment, she developed erythematous papules and plaques on the face and neck. Patch test revealed positive reactions to ammoniated mercury, thimerosal, and the herb ointment. Energy-dispersive X-ray microanalysis of the herb ointment showed a striking peak for mercury. (Kor J Dermatol 28(2): 212 215, 1990)
인간공학 관점에서의 심박측정 웨어러블 피트니스 트래커 형태인자(form factor) 연구
강동근(Kang, Dong Geun),정도성(Jung, Do Sung) 한국디지털디자인협의회 2014 디지털디자인학연구 Vol.14 No.4
현재 웨어러블 디바이스는 디지털 기기의 시장에서 가장 큰 화두로 떠오르고 있으며, 일상생활에 많은 변화를 가져다 줄 것으로 내다보고 있다. 이중 웨어러블 디바이스는 웨어러블 피트니스 트래커 분야가 가장 커져 있고, 가속계 센서를 사용하여 활동량만을 보여 주는 기능에서 더 나아가 다양한 센서를 이용하여 생체정보 수집으로 발전되고 있다. 운동의 성격에 따라 이 데이터들을 이용하여 사용자가 원하는 정보들을 제공하여 주는 것에 이르렀으며, 그로 인해 웨어러블 피트니스 트래커의 형태인자가 손목에 차는 형태를 중심으로 다양한 형태로 개발되어지고 있다. 그리하여 현재 운동 중 신체 어느 부위에 착용을 해야 인체공학적으로 사용편의성이 높은가에 대한 연구가 요구된다. 본 연구는 시장에 나온 제품을 조사하여 손목착용형, 가슴착용형, 이어폰형으로 형태인자를 분류하였고 현재 피트니스 트래커를 이용하는 사용자의 운동행태를 파악하여 걷기, 달리기, 자전거타기로 분류하였다. 웨어러블 관련 선행연구를 분석하고 전문가 집단토론을 통해 심미성, 착용성, 기능성으로 인간공학 평가척도 원칙을 체계화 하였으며, 각 형태인자의 사용할 때 행위나 제품의 구성요소를 파악하여 위 평가원칙으로 토대로 심층 인터뷰를 진행하여 현재 출시된 형태인자들 중 어떤 유형이 가장 편리한가에 대한 비교평가를 하였다. 이는 향후 피트니스 트래커를 개발 시 사용자가 요구하는 운동방법에 적합한 인체공학적 형태인자를 개발에 있어 지침이 될 수 있을 꺼라 생각한다. Currently, wearable devices are emerged as a hot topic in the digital device market and it is expected to bring a lot of changes in daily life. Fitness tracker is the largest field of wearable devices and it has been developed from the feature that shows only the activity by using the accelerometer sensor to the feature that collects biometric data using a variety of sensors. Depending on the character of the exercise, users can be provided with information what they want so that form factor of the fitness tracker has been developed in various forms, mainly in the form of worn wrist. Thus, research is required for the higher ergonomic ease of use according to where fitness tracker should be worn in any area of the body during exercise. This study categorizes the form factor into worn wrist type, worn chest type and ear phone type by researching the market appeared products. By analyzing the movement patterns of users currently using fitness tracker, this study categorizes them into walking, running and riding bicycle. This study analyzes the advanced research and through focus group interview, it systematizes the rating scale of human engineering : aesthetics, wearability and functionality. To grasp activity and product component when using each form factor, it did in-depth interview based on upper test principle. It conducts comparison evaluation that which type of forms is more usable and comfortable among currently appeared products. This study will become a milestone about developing human engineering form factor that is suitable for way of user-need exercise when developing fitness tracker.
축산물 및 가공 : 제주 개량 흑돼지와 국내에 도입된 주요 돼지 품종의 육질 특성 및근섬유 특성 비교
고경보 ( Kyong Bo Ko ),김갑돈 ( Gap Don Kim ),강동근 ( Dong Geun Kang ),김영화 ( Yeong Hwa Kim ),양익동 ( Ik Dong Yang ),류연철 ( Youn Chul Ryu ) 한국동물자원과학회(구 한국축산학회) 2013 한국축산학회지 Vol.55 No.5
This study compared the pork quality and muscle fiber characteristics between the Jeju black pig(JBP) and domesticated pig breeds, including three-way crossbred(Landrace×Yorkshire×Duroc, LYD), Berkshire(B), Duroc(D), Landrace(L), Meishan(M), and Yorkshire(Y) pigs. JBP had the lowest carcass weight among the pig breeds(p<0.05) and its NPPC marbling score was lower than the other domesticated pig breeds(p<0.05), except for M. M had the highest value for backfat thickness among the pig breeds (p<0.05), whereas its NPPC marbling score was the lowest(p<0.05). The pH values were higher in JBP and B at 45 min and 24 h postmortem, respectively, but LYD and M had the lowest pH values at 45 min and 24 h postmortem, respectively (p<0.05). M had a higher lightness and lower redness than the other breeds(p<0.05). Moreover, M had the highest drip loss among the pig breeds(p<0.05), whereas D had the lowest drip loss and the highest redness(p<0.05). In terms of muscle fiber characteristics, JBP and LYD had the largest type IIB fibers(p<0.05). The fiber number and area composition of type I fibers were higher in JBP than the others(p<0.05) however type IIA fibers were lowest in JBP among the pig breeds(p<0.05). Overall, our results indicate that JBP provided better pork quality compared with M, but the carcass trait and pork quality of JBP were not better than LYD and D, respectively.
조윤제 ( Yoon Je Cho ),곽상준 ( Sang Joon Kwak ),전영수 ( Young Soo Chun ),유기형 ( Kee Hyung Rhyu ),강동근 ( Dong Geun Kang ),유명철 ( Myung Chul Yoo ) 대한고관절학회 2011 Hip and Pelvis Vol.23 No.4
목적: 골성 고정된 Harris-Galante (HG) 비구컵을 제거하지 않고 폴리에틸렌 삽입물 만을 교체한 재치환술의 중기 추시 결과를 분석하고자 하였다. 대상 및 방법: 재치환술 시 골성 고정된 무시멘트 비구컵을 제거하지 않고, 폴리에틸렌 삽입물을 교체한 후, 5년 이상(평균 92개월) 추시 가능했던 33예를 대상하였다. Harris 고관절 점수, 골용해 크기 변화 및 폴리에틸렌 삽입물의 선형 마모율을 비교하였고, 이식골의 결합 정도와 새로운 골용해 병변 발생 여부를 관찰하였다. 결과: Harris 고관절 점수는 평균 89.3점으로 호전되었다. 골 이식을 시행한 군에서 골용해 크기가 감소하였고, 골 이식을 시행하지 않은 군에서 새로운 골용해의 발생은 없었다. 합병증으로 폴리에틸렌 삽입물의 해리와 치환물 주변 골절이 각 1예 있었다. 동일 관찰 시점의 비구 관절면 선형 마모율은 재치환술 전에 비하여 유의하게 감소하였다. 결론: 폴리에틸렌 삽입물 만을 교체하는 재치환술은 안전하고 효과적인 재치환술 방법으로 사료된다. 다만 잠김 기전이 약한 HG 비구컵의 특성상 조기에 잠금 장치의 손상이 발생할 위험이 높은 경우에는 비구컵 재치환술 또는 폴리에틸렌 삽입물 시멘트 고정 방법을 고려하는 것이 바람직 할 것으로 사료된다. Purpose: To analyze the results of isolated exchange of polyethylene (PE) liners for treatment of wear and osteolysis around a well-fixed Harris-Galante (HG) cementless acetabular cup. Materials and Methods: Thirty-three PE liner changes were performed without the removal of stably ingrown implants (33 hips of 32 patients). They were able to be followed for a mean period of 92 months. Clinically, the Harris hip score (HHS), pain evaluation, and complications were evaluated. Radiologically, the annual wear rate and the size of the osteolytic lesions were measured before the operation and the latest follow-up. The bone graft incorporation scale and the development of new osleolytic lesions were checked during the final follow-up. Results: HHS improved to 89.3 at last follow-up. The size of the osteolysis was significantly reduced postoperatively. Bone graft incorporation scales were Grade I in 9 and Grade II in 14 cases. New osteolytic lesions have not developed at latest follow-up. As a complication, one case of dissociation of a liner and a periprosthetic fracture were noted. Annual wear rates during the same period were significantly reduced. There was no sign of alteration in stability of the PE liner. Conclusion: Exchange of a PE liner without removal of stable implants can be a good option for the treatment of wear and osteolysis around a stable cementless THA implant, even if the system has a weak locking mechanism, such as the HG cup. In these cases, under certain states with a higher risk of early failure in the locking mechanism, it would be better to select other revision procedures such as cup revision or cemented polyethylene liner fixation.