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김광중(Gwang-jung Kim),최인철(Inchul Choi),최병철(Byungchul Choi) 한국자동차공학회 2014 한국자동차공학회 지부 학술대회 논문집 Vol.2014 No.5
Euro-6, Tier 4 Final 등의 국제 자동차배기가스 규제 중 NOx규제치인 0.4/kWh이하를 만족하기 위해서는 LNT와 SCR과 같은 후처리 장치가 필요하다. 하지만 보다 지속적으로 강화되는 규제를 만족시키기 위해서는 연소제어장치인 EGR의 적용이 필수불가결하다. EGR은 배기가스재순환을 의미하며, 배기가스 재순환량에 의해서 EGR율로 나타낼 수 있다. EGR율이 최적제어 되지 않으면, 배기가스 중 HC와 CO양이 오히려 증가하기 때문에 적정량의 배기가스를 재순환시켜야한다. 이때 EGR율은 흡/배기 시스템의CO₂농도로 계산 할 수 있다. 본 연구에서는 EGR율을 최적제어하기 위해서 실시간으로, 흡/배기시스템에서 CO₂의 농도를 계측하는 비 접촉식 센서를 설계하였고, 모사가스를 만들어 CO₂센서의 신뢰성과 반응속도, 정밀도를 검증하였다. CO₂의 농도에 따른 선형성은 원 데이터는 포화곡선은 보여서 함수를 적용하였다. 함수를 적용할 때 CO₂의 농도에 따라 신호변화는 선형적으로 변화하였으며, 5회 반복실험과 실시간 CO₂의 농도 변화에 따른 CO₂의 농도 출력으로 보아 신뢰성이 있다.
김수찬 ( Kim Su Chan ),안규중 ( An Gyu Jung ),한승경 ( Han Seung Gyeong ),김진우 ( Kim Jin U ),성경제 ( Seong Gyeong Je ),계영철 ( Gye Yeong Cheol ),김낙인 ( Kim Nag In ),조광현 ( Jo Gwang Hyeon ),김광중 ( Kim Gwang Jung ),윤재일 대한피부과학회 2003 대한피부과학회지 Vol.41 No.9
전국의 31개 병의원에서 10개월간 피부과 내원환자 중 피부외용제에 의한 부작용을 나타낸 1257예의 사례를 수집하여 분석하였으며 다음과 같은 결과를 얻었다. 1) 외용제에 의한 부작용은 오용 및 치료지연(40%), 진균감영(29%), 세균감영(14%), 접촉피부염(9%), 여드름, 피부위축, 혈관확장 등의 순으로 그 빈도가 높았으며 스테로이드 도포에 의한 부작용은 모두 620건(49%)에 달하였다. 2) 오용의 경우 백선증을 습진으로 오진한 경우가 7 Background : The abuse, misuse, and adverse effects to topical drugs have been widespread in Korea due to lack of awareness of seriousness of drug abuse and misuse, and improper designation of prescription and non-prescription drugs. Objective : This stud
아토피 피부염 환자에서 집먼지 진드기 항원에 대한 Pharmacia CAP system FEIA의 효용성
김성식 ( Kim Seong Sig ),방형돈 ( Bang Hyeong Don ),김광호 ( Kim Gwang Ho ),김광중 ( Kim Gwang Jung ) 대한피부과학회 2003 大韓皮膚科學會誌 Vol.41 No.11
N/A Barkground : Specific serum IgE determination is widely used in the diagnosis of IgE-mediated allergic diseases. House dust mite allergens are known to show good sensitivity on in vitro tests. We report the results of specific IgE against house dust allergen by Pharmacia CAP system FEIA and compared them with those of in vivo test. Objective : The aim of this study is to find out the clinical application of Pharmacia CAP system FEIA in atopic dermatitis. Methods : In 46 atopic dermatitis patients, skin prick test and Pharmacia CAP system FEIA were performed for Dermatophagoides pteronyssinus and Dermatophagoides farinae allergens. For all patients, atopy and family histories were taken. Results : 1) The positive results were more frequent in adult patients(over 16 years old, 73.3%) than in child patients(below 15 years old, 38.7%) in skin prick test for both Dermatophagoides pteronyssinus and Dermatophagoides farinae allergens. 2) When skin prick tests were used as a reference standard, the sensitivity of Pharmacia CAP system FEIA was 89.5% for Dermatophagoides pteronyssinus and 90.0% for Dermatophagoides farinae, and the specificity of Pharmacia CAP system FEIA was 77.8% for Dermatophagoides pteronyssinus and 80.8% for Dermatophagoides farinae. 3) Correlations were found between Pharmacia CAP system FEIA results and serum total IgE(r=0.574 for Dermatophagoides pteronyssinus and r=0.534 for Dermatophagoides farinae) Conclusion : Our results suggest that Pharmacia CAP system FEIA offers high sensitivity and can be an effective method of screening for allergies to Dermatophagoides pteronyssinus and Dermatophagoides farinae in atopic dermatitis. (Korean J Dermatol 2003;41(11) : 1455∼1462)
김원호 ( Kim Won Ho ),류정호 ( Lyu Jeong Ho ),김광호 ( Kim Gwang Ho ),김광중 ( Kim Gwang Jung ) 대한피부과학회 2004 대한피부과학회지 Vol.42 No.4
Infantile myofibromatosis is the most common of the juvenile fibromatoses and an unusual mesenchymal disorder characterized by the proliferation of tumors in the skin, muscle, bone and viscera. There are two forms of the disease: solitary and multicentric. A benign course with spontaneous regression is seen in most patients, but poor prognosis can be associated with the multicentric form, in which visceral organs may be involved. It usually presents in early childhood. We report a case of infantile myofibromatosis arising in the left sole of a female new born. Physical examination showed a firm, red colored 2×4㎝ sized trmor. Histological examination revealed a spindle cell tumor in the dermis with fascicles of plump spindle cells with a whorled arrangement. (Korean J Dermatol 2004;42(4):469~471)
원형 탈모증 환자에서 DNCB 도포부위에 발생한 백반증
김성식 ( Kim Seong Sig ),서영주 ( Seo Yeong Ju ),김광호 ( Kim Gwang Ho ),김광중 ( Kim Gwang Jung ) 대한피부과학회 2004 대한피부과학회지 Vol.42 No.4
We report a case of vitiligo developed on the sites of DNCB application for the treatment of alopecia areata in a 53-year-old woman. Histopathologic studies of the depigmented patches showed absence of melanin pigmentation at the basal layer of the epidermis and a negative reaction for the Fontana-Masson stain. The current theories explaining vitiligo development after topical sensitizer application are that topical sensitizers induce the vitiligo by a direct cytotoxic effect on the melanocytes, or by unmasking latent vitiligo as a result of the Koebner phenomenon due to contact dermatitis, but the exact mechanism is still unclear. (Korean J Dermatol 2004;42(4):452~455)
전신성 미만성 대형 B-세포 림프종을 동반한 호산구성 지방층염
김재왕 ( Kim Jae Wang ),김광중 ( Kim Gwang Jung ),이종주 ( Lee Jong Ju ) 대한피부과학회 2004 대한피부과학회지 Vol.42 No.3
Eosinophilic panniculitis(EP) is characterized by a prominent infiltration of subcutaneous fat with eosinophils. However, EP is a histopathologic pattern or reactive process rather than a distinct disease entity. It has been identified in patients who have a variety of associated clinical conditions. We report a case of a 37-year-old woman with EP on her abdominal region. Due to the pertinent clinical and laboratory investigation to rule out an accompanied systemic process, we found nodal diffuse large B-cell lymphoma. Although there have been several reports about the cases of EP in Korea, until now no case of EP accompanied with nodal lymphoma had yet been reported. (Korean J Dermatol 2004;42(3):332~336)
한의원 침술 및 정맥 배액에 의한 전염이 추정되는 윤상 농포성 건선양 2기 매독
김재왕 ( Kim Jae Wang ),김광중 ( Kim Gwang Jung ),이종주 ( Lee Jong Ju ) 대한피부과학회 2003 대한피부과학회지 Vol.41 No.11
Secondary syphilis has a myriad of clinical presentations as the great imitator. However, syphilid mimicking annular pustular psoriasis has been rarely reported in the Korean literature. Although the incidence of syphilis has been declining in recent years, serologic testing for syphilis might be mandatory in all types of the unestablished psoriasiform dermatoses, in that failure to diagnose early syphilis correctly can have potentially serious legal ramifications. Though the risk of non-sexual transmission of syphilis has been extremely low, the probability of transmission following needle-stick injury or acupuncture can not be excluded. We herein report a rare case of secondary syphilis with clinical features of annular pustular psoriasis following the repeated acupuncture and venous drainage by a herb doctor. (Korean J Dermatol 2003;41(11) : 1525-1529)
김재왕 ( Kim Jae Wang ),김광중 ( Kim Gwang Jung ),이종주 ( Lee Jong Ju ) 대한피부과학회 2003 대한피부과학회지 Vol.41 No.12
Non-nasal T/NK-cell lymphomas(TNKCL) are further subdivided into primary cutaneous and 4 subtypes of secondary cutaneous lymjphomas such as nasal type, aggressive, blastic(blastoid), and other specific NK-like T-cell lympoma. Aggressive T/NK-cell lymphoma/leukemia(ATNKCL) is a rare leukemic variant of nasal type TNKCL. Although ATNKCL invariably exhibits the identical histomorphological, genotypical and immunophenotyical findings with TNKCL, it is distinguishable from the nasal type of TNKCL in that the former reveals atypical cells having large azurophilic cytoplasmic granules in the peripheral blood and bone marrow. We herein report a rare case of ATNKCL with secondary cutaneous lesions. (Korean J Dermatol 2003;41(12):1638~1643)