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 %).

아동청소년 교우관계문제검사의 요인구조

최선희,김종미,홍상황,Choi, Sun-Hee,Kim, Jong-Mee,Hong, Sang-Hwang 한국초등상담교육학회 2011 초등상담연구 Vol.10 No.2

본 연구는 아동청소년 교우관계문제검사(KIPR)에 잠재되어 있는 요인구조를 밝히고 검증하여 이 검사의 심리적 특성을 밝히고 해석적 유용성을 높이는데 목적이 있다. 이를 위해 경남지역 3개 초등학교 4~6학년 아동 616명을 대상으로 아동청소년 교우관계문제검사를 실시하였고 그 중 578명의 자료를 분석하였다. 연구결과를 요약하면 다음과 같다. 첫째, 3요인과 4요인 모형을 설정하여 탐색적 요인분석을 실시한 결과 3요인 모형이 적합한 것으로 나타났다. 3요인 모형에서 요인 1은 아동청소년 교우관계문제검사의 비주장성(C5), 사회적 억제(C4), 냉담(C3), 과순응성(C6) 원형척도의 문항들로 구성되어 있어서 "자신감 결여와 사회적 위축", 요인 2는 통제지배(C1), 자기중심성(C2) 원형척도의 문항들로 구성되어 있어서 "공격성과 타인조종", 요인 3은 자기희생(C7), 과관여(C8), 과순응성(C6) 원형척도의 문항들로 구성되어 있어서 "과잉배려"로 명명하였다. 둘째, 확인적 요인분석을 실시한 결과 3요인 모형은 4요인 모형보다 수집된 자료를 잘 반영하고 있었고(RMSEA=.054), 적합도는 만족할 수준은 아니지만 수용할 수 있는 수준이었고(CFI=.786), 모형의 간명성 또한 적합한 것으로 나타났다(PCFI=.733). 본 연구에서는 교우관계원형에서 상관계수가 높은 인접한 척도끼리는 동일한 요인으로 묶여지는 것을 확인하였고 이를 통해 8개의 원형척도를 망라하는 상위의 대표적인 요인척도를 구성하는데 필요한 근거를 제공하여, 이 검사의 해석적 유용성을 높였다는 점에서 의의가 있다고 생각된다. The purpose of this study is to reveal and confirm the factor structure inherent in the Korean inventory of peer relationships(KIPR; Sang-Hwang Hong, et al., 2009) in order to strengthen the interpretive usefulness of the test. For this purpose, the inventory was administered to the total of 616 children in the fourth through sixth grades in three elementary schools located in Gyungnam area, and the data from 578 of them were analyzed. The results of the study can be summarized as follows. First, as a result of the exploratory factor analysis of 3-factor and 4-factor models, the 3-factor model was found to be more appropriate. In the 3-factor model, the factor 1 is named "Lack of Self-Confidence and Social Withdrawal" as it consists of such circumplex scale items as Non-Assertiveness (C5), Social Avoidance (C4), the Cold (C3), and Too Submissive (C6). The factor 2 is named "Too Aggressive and Controlling" and consists of items Too Controlling (C1) and Hard to be Supportive (C2). The factor 3 is named "Too Caring" and consists of items Too Responsible (C7), Over Involvement (C8), and Too Submissive (C6). Second, as a result of the confirmatory factor analysis, the 3-factor model, in comparison to the 4-factor model, was found to better reflect the collected data(RMSEA=.054), its goodness of fit was not satisfactory but within the acceptable range(CFI=.786), and its power of simplicity and clarity was also adequate(PCFI=.733). In the current study, through the exploratory and confirmatory factor analyses of scores from the Korean inventory of peer relationships circumplex scales, scales within the peer relationship circumplex model that are near each other and are highly correlated were confirmed to be grouped together as same factors. I believe the main merit of the study lies in the above result having provided the necessary foundation for forming the superordinate and representative scale that encompasses the eight circumplex scales, which enhances the test's interpretive usefulness.

요통(腰痛) 환자에 대한 침치료(針治療)와 직접구(直接灸) 병행치료(竝行治療)에 대한 비교(比較) 연구(硏究)

위종성,원승환,황정수,선승호,안영민,손승현,박기철,박희수,We, Jong-sung,Won, Seung-hwan,Hwang, Jung-soo,Sun, Seung-ho,Ahn, Young-min,Sohn, Seung-hyun,Park, Ki-chul,Park, Hee-soo 대한침구의학회 2004 대한침구의학회지 Vol.21 No.6

Objective : The purpose of this report is to examine the effects of direct moxibustion in the Low back pain patient. Methods : Clinical studies were done 30 patients who were treated with low back pain to Dept. of Acupuncture & Moxibustion, of Oriental Medical Sang-Ji University from September 1, 2003 to August 31, 2004. We treated them by Oriental medical therapy(including direct moxibustion)for 10 days. The evaluation was performed five times(admission day, before and after each twice). Results : 1. VAS was decreased after direct moxibustion for 10 days significantly(p<0.01). 2. After direct moxibustion, S.L.R. T angle of patients were increased. ConclUsions : We brought to the conclusion that direct moxibustion has possibility to the efficient to cure the Low back pain. So we suggest the possibility to use this treatment for Low back pain.

반응표면 분석법을 이용한 천연마섬유보강 순환굵은골재 콘크리트의 성능 평가

전지홍,김황희,김춘수,유성열,박찬기,Jeon, Ji Hong,Kim, Hwang Hee,Kim, Chun Soo,Yoo, Sung Yeol,Park, Chan Gi 한국농공학회 2014 한국농공학회논문집 Vol.56 No.4

In this study, evaluated ware the strength and durability of the vegetated water purification channel concrete to which recycled aggregates, hawang-toh and jute were applied. Box-Behnken method of response surface analysis in statistics was applied to the experimental design. Experimental variables are as follows, recycled coarse aggregates, hawang-toh, blast-furnace slag and jute fiber. In the experiment, conducted were the tests of compressive strength, chloride ion penetration, abrasion resistance and impact resistance the replacement rate effects of the recycled aggregates, blast-furnace slag and hwang-toh on the performance of vegetated water purification channel concrete were analyzed by using the response surface analysis method on the basis of the experimental results. In addition, an optimum mixing ratio of vegetated water purification channel concrete was determined by using the experimental results. The optimum mixing ratio was determined to be in 10.0% recycled coarse aggregates, 60.0% blast-furnace slag, 10.1% hwang-toh and 0.16% jute fiber. The compressive strength, chloride ion penetration, abrasion rate, and impact number of fracture test results of the optimum mixing ratio were 24.1 MPa, 999 coulombs, 10.30 g/mm3, and 20 number, respectively.

The effect of injection rate on etomidate-induced myoclonus

Sang Hwan Do,Sung Hee Han,Sang Hyun Park,Jin Hee Kim,Jin Young Hwang,Il Soon Son,Min Seok Kim 대한마취과학회 2008 Korean Journal of Anesthesiology Vol.55 No.3

Single error correcting code using PBCA

Sung-Jin Cho,김한두,표용수,Yong-Bum Park,Yoon-Hee Hwang,Un-Sook Choi,Seong-Hun Heo 한국전산응용수학회 2004 Journal of applied mathematics & informatics Vol.14 No.-

In recent years, large volumes of data are transferred between a computer system and various subsystems through digital logic circuits and interconnected wires. And there always exist potential errors when data are transferred due to electrical noise, device malfunction, or even timing errors. In general, parity checking circuits are usually employed for detection of single-bit errors. However, it is not sufficient to enhance system reliability and availability for efficient error detection. It is necessary to detect and further correct errors up to a certain level within the affordable cost. In this paper, we report a generation of 3-distance code using the characteristic matrix of a PBCA. In recent years, large volumes of data are transferred between a computer system and various subsystems through digital logic circuits and interconnected wires. And there always exist potential errors when data are transferred due to electrical noise, device malfunction, or even timing errors. In general, parity checking circuits are usually employed for detection of single-bit errors. However, it is not sufficient to enhance system reliability and availability for efficient error detection. It is necessary to detect and further correct errors up to a certain level within the affordable cost. In this paper, we report a generation of 3-distance code using the characteristic matrix of a PBCA.

Genetic Polymorphisms of p53 Tumor Suppressor Gene in Korean Population

Hwang, Hye Suk,Hwang, Jung Hee,Shin, Sang Hee,Kim, Hyun Sup,Kim, Nam Keun,Kim, Se Jae,Chung, Ki Wha 공주대학교 자원재활용 신소재 연구센터 2002 센터사업 성과집 Vol.- No.1

Mutations in the p53 tumor suppressor gene are frequently found in many different forms of human cancers, the majority of which are missense mutations which alter the DNA-binding property and transcriptional activity of the product. In the present study, three p53 restriction fragment length polymorphisms(BstUI RFLP in exon 4, MspI RFLP in intron 6 and TaqI RFLP in exon 6) were examined in 154 controlled studies and 57 patients with cerical cancer from the Korean population. The A1 allele frequencies of BstUI and MspI RELPs in controlled studies were 0.395 and 0.029, respectively. The TaqI RELP sites (codon 213 polymorphism) were, however, monomorphic in the Korean population. The genotype distributions of BstUI and MspI polymorphic sites between control and patient groups well agreed upon with the Hardy-Weinberg equilibrium(BstUI RFLP: x^2 = 1.468, p=0.480; MspI RFLP: x^2 = 0.209, p= 0.647), which suggested that three RFLPs have no relevance to the susceptibility of cervical cancer development. This study showed that the allele frequencies of BstUI and MspI RFLPs in Korean populations are significantly different from other ethnic populations. Thus, it seems that the p53 polymorphisms are useful for the studies of human population genetics and anthropology.

OB-06 : Placental ratio between normal and complicated pregnancies including intrauterine growth restriction and preeclampsia

( Hee Sun Kim ),( Seung Woo Yang ),( Soo Hyun Cho ),( In Sook Sohn ),( Han Sung Kwon ),( Han Sung Hwang ) 대한산부인과학회 2012 대한산부인과학회 학술대회 Vol.99 No.-

The aim of this study was to evaluate the relation between birthweight and placental ratios in normal and complicated pregnancies including intrauterine growth restriction (IUGR) and preeclampsia (PE). 226 pregnant women were enrolled from August, 2005 to July, 2013. PE was classified as PE without IUGR and PE with IUGR. All participants were divided into 4 groups; normal (n=87), IUGR (n=37), PE without IUGR (n=65), and PE with IUGR (n=37) group. Placental ratio used in this study included birthweight-placental weight (BPW) ratio, birthweight-placental volume (BPV) ratio, and birthweight-placental density (BPD) ratio. Women with a history of diabetes, hypertension, renal disease, fetal anomaly, and other medical diseases were excluded. ANOVA and t-test were used to compare birthweight, placental weight, placental volume, BPW ratio, BPV ratio, BPD ratio among each group. Birthweight, placental weight, placental volume, and BPD ratio were decreased in IUGR compared with normal group (p<0.001). Between normal and PE group, birthweight, placental weight, placental volume, BPW ratio, BPV ratio, and BPD ratio were significantly decreased in PE group (p<0.001). In PE group, placental weight, birthweight, and BPD ratio were decreased in PE with IUGR compared to PE without IUGR group (p<0.001). Placental ratios reflected the specific characteristics of complicated pregnancies including IUGR and PE. Among placental ratios, BPD ratio was specifically correlated with IUGR. Therefore, BPD ratio can be used as a predictive factor of IUGR. Key word: Preeclampsia, Intrauterine growth restriction, Birthweight-placental density ratio

Image-based object reconstruction using run-length representation

Hwang, Sung Soo,Kim, Hee-Dong,Jang, Tae Young,Yoo, Jisung,Kim, Sujung,Paeng, Kyunghyun,Kim, Seong Dae Elsevier 2017 SIGNAL PROCESSING-IMAGE COMMUNICATION - Vol.51 No.-

<P><B>Abstract</B></P> <P>This paper presents an image-based object reconstruction with a low memory footprint using run-length representation. While conventional volume-based approaches, which utilize voxels as primitives, are intuitive and easy to manipulate 3D data, they require a large amount of memory and computation during the reconstruction process. To overcome these burdens, this paper uses 3D runs to represent a 3D object and reconstructs each 3D run from multi-view silhouettes with a small amount of memory. The proposed geometry reconstruction is also computationally inexpensive, as it processes multiple voxels simultaneously. And for the compatibility with the conventional data formats, generation of polygonal 3D meshes from the reconstructed 3D runs is proposed as well. Lastly, texture mapping is proposed to additionally reduce the amount of memory for object reconstruction. The proposed reconstruction scheme has been simulated using various types of multi-view datasets. The results show that the proposed method performs object reconstruction with a smaller amount of memory and computation than voxel-based approaches.</P> <P><B>Highlights</B></P> <P> <UL> <LI> An image-based object reconstruction using run-length representation is proposed. </LI> <LI> A fast geometry reconstruction by rectifying images is proposed. </LI> <LI> A 3D mesh generation algorithm from the reconstructed 3D runs is proposed. </LI> <LI> View dependent texture mapping algorithm using a color palette is proposed. </LI> </UL> </P>

Treadmill Exercise Improves Memory Function Depending on Circadian Rhythm Changes in Mice

Hwang, Dong Sup,Kwak, Hyo Bum,Ko, Il Gyu,Kim, Sung Eun,Jin, Jun Jang,Ji, Eun Sang,Choi, Hyun Hee,Kwon, Oh Young Korean Continence Society 2016 International Neurourology Journal Vol.20 No.2

<P><B>Purpose</B></P><P>Exercise enhances memory function by increasing neurogenesis in the hippocampus, and circadian rhythms modulate synaptic plasticity in the hippocampus. The circadian rhythm-dependent effects of treadmill exercise on memory function in relation with neurogenesis were investigated using mice.</P><P><B>Methods</B></P><P>The step-down avoidance test was used to evaluate short-term memory, the 8-arm maze test was used to test spatial learning ability, and 5-bromo-2’-deoxyuridine immunofluorescence was used to assess neurogenesis. Western blotting was also performed to assess levels of synaptic plasticity-associated proteins, such as brain-derived neurotrophic factor, tyrosine kinase receptor B, phosphorylated cAMP response element-binding protein, early growth response protein 1, postsynaptic density protein 95, and growth-associated protein 43. The mice in the treadmill exercise at zeitgeber 1 group started exercising 1 hour after sunrise, the mice in the treadmill exercise at zeitgeber 6 group started exercising 6 hours after sunrise, and the mice in the treadmill exercise at zeitgeber 13 group started exercising 1 hour after sunset. The mice in the exercise groups were forced to run on a motorized treadmill for 30 minutes once a day for 7 weeks.</P><P><B>Results</B></P><P>Treadmill exercise improved short-term memory and spatial learning ability, and increased hippocampal neurogenesis and the expression of synaptic plasticity-associated proteins. These effects of treadmill exercise were stronger in mice that exercised during the day or in the evening than in mice that exercised at dawn.</P><P><B>Conclusions</B></P><P>Treadmill exercise improved memory function by increasing neurogenesis and the expression of synaptic plasticity-associated proteins. These results suggest that the memory-enhancing effect of treadmill exercise may depend on circadian rhythm changes.</P>