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황준현,감신,신지연,김종연,이경은,권기홍,전병열,채성철,양동헌,박헌식,황태윤 대한의학회 2013 Journal of Korean medical science Vol.28 No.12
The aim of this study was to describe the incidence of metabolic syndrome and to identify five components as metabolic syndrome predictors. The final study included 1,095 subjects enrolled in a rural part of Daegu Metropolitan City, Korea for a cohort study in 2003. Of these, 762 (69.6%) subjects had participated in the repeat survey. During the five-year follow-up, incidence density was significantly higher for women than for men (men, 30.0/1,000 person-years; women, 46.4/1,000 person-years). In both men and women, incidence of metabolic syndrome showed a significant increase with increasing number of metabolic syndrome components at baseline. Compared with individuals presenting none of components at baseline, relative risks were increased 1.22 (men; 95% CI, 0.43-3.51), 2.21 (women; 95% CI, 0.98-4.97) times more for individuals with one component of metabolic syndrome and 5.30 (men; 95% CI, 2.31-12.13), 5.53 (women; 95% CI, 2.78-11.01) times more for those who had two components. In multivariate analysis, the most powerful risk factor for metabolic syndrome was abdominal obesity in men and low HDL-cholesterol in women (adjusted relative risk, 3.28, 2.53, respectively). Consequently, finding a high risk group for metabolic syndrome according to gender and prevention of metabolic syndrome through lifestyle modification are essential.
리튬계 수소화물 전해질 복합막의 열확산 및 전기화학적 특성평가
황준현,홍태환 한국재료학회 2022 한국재료학회지 Vol.32 No.10
There is ongoing research to develop lithium ion batteries as sustainable energy sources. Because of safety problems, solid state batteries, where electrolytes are replaced with solids, are attracting attention. Sulfide electrolytes, with a high ion conductivity of 103 S/cm or more, have the highest potential performance, but the price of the main materials is high. This study investigated lithium hydride materials, which offer economic advantages and low density. To analyze the change in ion conductivity in polymer electrolyte composites, PVDF, a representative polymer substance was used at a certain mass ratio. XRD, SEM, and BET were performed for metallurgical analyses of the materials, and ion conductivity was calculated through the EIS method. In addition, thermal conductivity was measured to analyze thermal stability, which is a major parameter of lithium ion batteries. As a result, the ion conductivity of LiH was found to be 106 S/cm, and the ion conductivity further decreased as the PVDF ratio increased when the composite was formed.
핀-관 열교환기에서 동적접촉각과 물맺힘량과의 상관관계에 관한 연구
황준현,고영환,신종민 대한설비공학회 2002 설비공학 논문집 Vol.14 No.10
An experimental study on the behavior of the water hold-up by spraying of a fin-and-tube heat exchanger with regard to the surface characteristics, i.e., contact angles, was conducted. The dynamic contact angles (DCA) were measured, and water hold-up by spraying (WHS) was conducted in the experiment. It is found that heat exchanger surface characteristics, spray pressure, spray water temperature and heat exchanger surface temperature play an important role in WHS. In order to evaluate relationship between WHS and surface characteristics, test conditions are determined through a contour analysis. A correlation was proposed to predict WHS as a function of DCA. With its test efficiency and consuming time, the prediction method can be used to evaluate WHS performance.
오랜 기간 완전완화 후 말초신경병증으로 재발한 신경림프종증
황준현,고판우,서안나,채종민,강병욱,이재혁,서정규,송현석 대한임상신경생리학회 2011 Annals of Clinical Neurophysiology Vol.13 No.2
Neurolymphomatosis, an uncommon manifestation of non-Hodgkin’s lymphoma, is lymphomatous infiltration of peripheral nerves. We confirmed the diagnosis of neurolymphomatosis in a 75-year old woman with a history of complete remission of diffuse large B cell type lymphoma on the nasal cavity seven years ago. She complained of painful weakness of left leg and took the electrophysiologic study, extremity ultrasonography, fluorodeoxyglucose PET-CT, and extremity MRI serially. She was diagnosed as neurolymphomatosis by targeted posterior tibial nerve mass biopsy.
황준현,류동희,박순우 대한의학회 2015 Journal of Korean medical science Vol.30 No.8
We investigated the interaction effect between body weight perception and chronic disease comorbidities on body weight control behavior in overweight/obese Korean adults. We analyzed data from 9,138 overweight/obese adults ≥ 20 yr of age from a nationally representative cross-sectional survey. Multiple logistic regression using an interaction model was performed to estimate the effect of chronic disease comorbidities on weight control behavior regarding weight perception. Adjusted odds ratios for weight control behavior tended to increase significantly with an increasing number of comorbidities in men regardless of weight perception (P < 0.05 for trend), suggesting no interaction. Unlike women who perceived their weight accurately, women who under-perceived their weight did not show significant improvements in weight control behavior even with an increasing number of comorbidities. Thus, a significant interaction between weight perception and comorbidities was found only in women (P = 0.031 for interaction). The effect of the relationship between accurate weight perception and chronic disease comorbidities on weight control behavior varied by sex. Improving awareness of body image is particularly necessary for overweight and obese women to prevent complications.
피라미드 영상과 퍼지이론을 이용한 폐부 혈관의 검출에 관한 연구
황준현,박광석,민병구,Hwang, Jun-Hyun,Park, Kwang-Suk,Min, Byoung-Gu 대한의용생체공학회 1991 의공학회지 Vol.12 No.2
For the automatic detection of pulmonary blood vessels, a new algorithm is proposed using the fact that human recognizes a pattern orderly according to their size. This method simulates the human recognition process by the pyramid images. For the detection of vessels using multilevel image, large and wtde ones are detected from the most compressed level, followed by the detection of small and narrow ones from the less compressed images with FCM(fuzzy c means) clustering algorithm which classifies similar data into a group. As the proposed algorithm detects blood vessels orderly according to their size, there is no need to consider the variation of parameters and the branch points which should be considered in other detection algirithms. In the detection of patterns whose size changes successively like pulmonary blood vessels, this proposed algorithm can be properly applied
농촌지역 고혈압 전단계 성인의 혈청 Gamma-Glutamyltransferase와 고혈압 발생률간의 관련성
황준현,신지연,천병렬,이덕희,김건엽,박의현,채성철,Hwang, Jun-Hyun,Shin, Ji-Yeon,Chun, Byung-Yeol,Lee, Duk-Hee,Kim, Keon-Yeop,Park, Wee-Hyun,Chae, Shung-Chull 대한예방의학회 2010 예방의학회지 Vol.43 No.1
Objectives: Prehypertension is associated with a higher risk of developing hypertension compared with normotension. Yet, factors predicting the development of hypertension among prehypertensive people are ill-understood. This prospective cohort study was performed to examine if serum gamma-glutamyltrasferase (GGT) within a normal range can predict the future risk of hypertension among prehypertensive adults. Methods: Study subjects were 293 prehypertensive persons >30-years-of-age who participated in a community-based health survey in 2003 and who were followed up in 2008. Sex-specific quartiles of baseline serum GGT were used to examine association with 5-year hypertension incidence. Results: Baseline serum GGT within normal range predicted the risk of developing hypertension for 5 years only in prehypertensive women. Adjusted relative risks were 1.0, 3.7, 3.6, and 6.0 according to quartiles of baseline serum GGT (P for trend <0.01). This pattern was similarly observed in non-drinkers. However, serum GGT was not associated with incident hypertension in men. Different from serum GGT, baseline serum alanine aminotransferase, another well-known liver enzyme, did not predict the risk of incident hypertension in both genders. Conclusions: Even though baseline serum GGT within normal range strongly predicted the future risk of hypertension, it was observed only in women, Although underlying mechanisms of this association are currently unclear, serum GGT can be used to select a high risk group of hypertension in prehypertensive women.