고로슬래그시멘트를 사용한 다공성 황토콘크리트의 성능 평가

김황희,강수만,박종식,박상우,전지홍,이진형,차상선,박찬기,Kim, Hwang-Hee,Kang, Su-Man,Park, Jong-Sik,Park, Sang-Woo,Jeon, Ji-Hong,Lee, Jin-Hyung,Cha, Sang-Sun,Park, Chan-Gi 한국농공학회 2010 한국농공학회논문집 Vol.52 No.3

This study aims to evaluate a porous concrete using hwang-toh, blast furnace slag and blast furnace slag (BFS) cement instead of type I cement. The tests that were carried out to analysis the properties of porous hwang-toh BFS cement concrete included compressive strength, continuous void ratio, absorption rate, and pH value, repeated freezing and thawing test were conducted. Test results indicated that the performance in porous hwang-toh concrete are effective on the kaoline based binder materials. The pH value were shown in about 9.5 ~ 8.5. The compressive strength was increased and void ratio was decreased with increasing the kaoline based binder materials, respectively. The void ratio and compressive strength were in the range of about 21 ~ 30 %, 8 ~ 13 MPa, respectively. The increased in void ratio of more than 25 % is showed to reduce the resistance of repeated freezing and thawing. Also, the resistance of repeated freezing of thawing and the compressive strength of porous hwang-toh BFS cement concrete are independent with hwang-toh content and BFS cement amount. But, the void ratio was decreased with increasing the high volume hwang-toh contents (more than 15 %).

서브 미크론 반도체소자의 2차원 해석

황성범,박상정,홍창희 東亞大學校 附設 情報通信硏究所 1995 情報通信硏究所論文誌 Vol.3 No.1

A two dimension Monte Carlo program coupled with a program for solving Poisson's equation is used to perform a self-consistent simulation a quarter-micrometer-channel GaAs MESFET having a uniformly doped channel. for ?? and ??, the simulation yields ??, ??, ??, the current, transconductance, and cutoff frequency obtained from the Monte Carlo simulation are considerably larger than those obtained from the conventional 2D analysis. the reason for the high performance are discussed in terms of the electron dynamics.

동종 골수이식 후 만성 이식편대숙주질환과 동반된 그레이브스병

황호인,이제중,조상희,김여경,이병환,정익주,김형준 대한조혈모세포이식학회 2002 대한조혈모세포이식학회지 Vol.7 No.1

저자들은 중증 재생불량성빈혈로 동종 골수이식 및 추가적인 동종 말초혈액 조혈모세포이식을 시행 받은 후 만성 이식편대숙주질환이 발생하여 면역억제제로 조절되었으나 자가면역성 갑상선기능항진증이 병발한 1예를 경험하였기에 이를 보고하는 바이다. Chronic graft-versus-host disease (GVHD), which is a frequent complication following bone marrow transplantation (BMT), is characterized by fibrosis of the skin, liver, lungs, and gastrointestinal tract, immunodeficiency, and the production of autoantibodies. Endocrine dysfunction, in particular thyroid disease, has been described following BMT, but this has previously meant hypothyroidism secondary to total body irradiation or transfer of autoimmune hyperthyroidism from a donor with Graves’ disease rather than in association with chronic GVHD. We report a case of a 26-year-old man who developed Graves’ disease eight years after BMT and who had remission of chronic GVHD. He received an allogeneic BMT for severe aplastic anemia. Eighteen months after BMT, diarrhea and chronic GVHD developed and were treated with cyclosporine and steroid. Four years after ceasing the cyclosporine, the patient developed weight loss, palpitations, fever, and anterior neck swelling, and was diagnosed with Graves’ disease based on typical thyroid function tests. The signs and symptoms in the patient improved with propylthiouracil and propranolol.

선천성 피부 형성부전증 1례 보고

황성진,박혜림,김희석,김동철,김정헌 大韓成形外科學會 1994 Archives of Plastic Surgery Vol.21 No.2

Aplasia cutis congenita is a disorder of heterogeneous group characterized by isolate or multiple, localized or widespread areas of skin defect at birth. Since the first report by Cordon in 1767, it has been relatively rarely reported disorder abroad as well as domestically . It has several clinical subtypes classified by the location and pattern of skin absence, the presence of associated malformations and the mode of inheritance with unknown cause. We had a newborn male infant with this disorder clinically diagnosed, who showed wide full thickness skin defects on right knee and medial surface of ankle from birth, that covered with thin yellowish membrane and showed focal ulcerative area. On his familial history, there were four aplasia cutis congenita patients in the patient's mother in his maternal family side through four generations. Patient mother showed wide spread atrophic scarred looking appearance on her right lower leg. Chromosomal analysis revealed as normal male karyotype. The biopsy of lesions showed ulcerated surface and underlying chronic inflammation with total absence of epidermis. He had no associated congenital anomaly. The lesions healed rapidly for four weeks by conservative treatment as moist wound dressing and systemic antibiotic administrations. As a relatively uncommon skin anomaly, one case of aplasia cutis congenita is reported with review of references.

마쇄고추를 첨가한 김치의 이화학적 성분 변화 및 관능적 특성

황성연,박소희,강근옥,이현자,복진흥 한국식생활문화학회 2005 韓國食生活文化學會誌 Vol.20 No.2

We investigated the physico-chemical and sensory characteristics of Kimchi made with red pepper that was washed and mashed. The pH of juice from Kimchi made with red pepper powder was the highest on the day of Kimchi preparation. In the case of Kimchi made with mashed red pepper, the pH of juice and liquid was lower than that of other samples. A similar decrease in pH of juice and liquid was observed up to the second week of fermentation, but the significant difference between both samples wasn't found. The total acidity of Kimchi with mashed red pepper was significantly increased during early fermentation, but was similar during the second week, compared with that of Kimchi with red pepper powder. From the third week of storage, both juice and liquid from Kimchi made with red pepper powder was relatively increased. L and a value of liquid was highest in the case of Kimchi made with mashed red pepper, but b value was lowest during fermentation. In the case of organic acids. acetic acid and lactic acid contents were increased in Kimchi made with mashed red pepper while fermentation progressed. In addition, citric acid content was constant up to the second week in Kimchi made with mashed red pepper but from the third week wasn't detected in both Kimchi made with mashed red pepper and Kimchi made with red pepper powder. In the case of QDA(Quantitative Descriptive Analysis) profiles, the values of Kimchi made with mashed red pepper were significantly higher than those of Kimchi made with red pepper powder in respect to redness, pungency and fresh flavor immediately after the preparation of Kimchi and during the second week of fermentation, but during the fifth week the values were higher in respect to redness and fresh flavor of Kimchi. Appearance and overall acceptability was remarkably increased in Kimchi made with mashed red pepper, compared with that of Kimchi made with red pepper powder immediately after pickling, during the second and the fifth week of fermentation. Therefore, these results indicate that mashed red pepper increased more citric acid content, L and a value of Kimchi in comparison with red pepper powder, resulting in the good effects on overall acceptability due to the significant increase of redness and fresh flover.

크립토코쿠스에 의한 만성 수뇌막염 치험 1례

황성희,허경 최신의학사 1993 最新醫學 Vol.36 No.12

이방향성 형상기억합금을 이용한 공동 주택용 방화 댐퍼 설계 연구

황성태,이찬희,장진수,변창수,히식수렝,이상욱 순천향대학교 산업기술연구소 2022 순천향 산업기술연구소논문집 Vol.28 No.2

The purpose of this paper is to redesign, compare, and study using bi-directional shape memory alloy spring to compensate for the shortcomings of the existing fire damper performance. Through the spring constant measurement experiment, using the difference in force between the coil spring and the shape memory alloy spring, the damper closes when the set temperature is reached, and opens again when the temperature is lowered. In addition, the internal structure was redesigned through smoke leakage experiments. As a result, semi-permanent usable dampers were modeled.

편마비환자의 상지 근전도 소견의 시기별 변화

차상민,김희상,안경회,황치문 大韓再活醫學會 1999 Annals of Rehabilitation Medicine Vol.23 No.3

원발성 두개강내종양 2,616례의 통계학적 연구(1976-1995)

황승균,정희원,오창완,양희진,남도현,이상형,정영섭,김동규,왕규창,한대희,최길수,조병규 대한신경외과학회 1997 Journal of Korean neurosurgical society Vol.26 No.7

저주파수 및 저입력전압용 박막형 다중접합 열전변환기

황찬순,이형주,김진섭,이정희,박세일,권성원 한국센서학회 2002 센서학회지 Vol.11 No.3

저주파수의 저전압용 크로멜-알루멜 다중접합 열전변환기를 개발하고자 NiCr 히터의 두께를400 nm, 600 nm 및 800 nm로 변화시켰다. 40 Hz∼10 kHz의 직류 역방향 주파수 범위로 0.5 V의 교류 실효전압을 열전변환기에 인가시켰을 때 히터의 두께가 400 nm인 열전변환기가 ±0.51∼±1.69 ppm 범위의 열전효과에 의한 교류-직류 전압 변환오차를 나타내었고, 열전효과 및 주파수에 의한 교류-직류 변환오차는 40 Hz∼l MHz의 주파수 범위에서 ±40∼±115 ppm 범위를 나타내어, 저주파수의 저전압용으로 사용할 수 있었다. NiCr-heaters with three different thicknesses ranging from 400 nm to 800 nm were fabricated and their characteristics were compared for the purpose of developing a chromel-alumel multijunction thermal converter for low input voltage with low frequency. The thermoelectric effect-induced AC-DC voltage transfer difference of the thermal converter with a built-in NiCr-heater of 400 nm-thickness was ±0.51∼±1.69 ppm in the DC reversing frequency of 40 Hz∼10 kHz with appling 0.5 V_rms and the difference was increased to ±40∼±115 ppm in the frequency of 40 Hz~l MHz, when both thermoelectric effects and frequency effects were considered, showing the thermal converter would be suitable for the low input voltage application with low frequency.