Floristic characteristics of vascular plants and first distributional report of Pseudostellaria baekdusanensis M. Kim in Yongneup wetland protected area

Young-Chul Kim,Hyun-Hee Chae,Sang-Heock Oh,Seung-Ho Choi2,Moon-Pyo Hong3,Gi-Heum Nam,Jae-Yoon Choi,Hyun-Sook Choi,Kyu-Song Lee 한국환경생태학회 2015 한국환경생태학회지 Vol.29 No.2

Yongneup wetland protected area, the only high moor in Korea, is a core area to conserve biodiversity. Even though the Yongneup wetland protected area is relatively small, various plant species are distributed in the Yongneup wetland protected area because it includes various habitats showing different environmental gradients. Vascular plants distributed in the Yongneup wetland protected area were identified as a total of 376 taxa that is composed of 73 families, 217 genera, 322 species, 3 subspecies, 44 varieties and 7 forms. For endangered plants designated by the Ministry of Environment, 5 species including Trientalis europaea var. arctica, Lilium dauricum, Halenia corniculata, Lychnis wilfordii and Menyanthes trifoliata were found and 34 taxa were confirmed to be distributed only in the mountainous wetland habitats. Regarding naturalized plants, a total of 11 taxa were distributed, but most of them were distributed in the areas where artificial interference has occurred. And in areas inside the wetlands that are relatively well preserved, 2 species of Bidens frondosa and Erigeron annuus were observed. In this study, the occurrence and distribution of Pseudostellaria baekdusanensis M. Kim, which was recently found in Mt. Baekdu and reported as a new species, were identified in the Yongneup wetland protected area. A wetland is a very vulnerable area to drastic environmental changes and damages to its ecosystem could cause the extinction of rare plant species which are distributed only in the wetlands. Therefore, it is mandatory that current status of the Yongneup wetland protected area is evaluated and actions to prevent rapid environmental changes are taken. Fourteen separate investigations were conducted in 2013 and another four in 2014, to evaluate current status of the Yongneup wetland protected area. These investigations have provided us the basic information for future actions of conservation and restoration.

농촌지역 노인들의 우울증상에 관련된 요인들의 특성

송미숙,전기홍,송현종,김정은,박승구,신상건,이동훈,정성현,최연주,최완철,최민규,황재철,홍지만 아주대학교 1997 아주의학 Vol.2 No.2

This study was performed to identify risk factors for depression among the elderly in a rural area. A survey was done for the elderly living in Gosam-myenn, Ansung-kun during the period of July 28, 1997 and July 30, 1997. Demographic and sodoeconornic characteristics, and functional and health Status were assessed using a structured questionnaire, and the level of depression was measured by GDS score. The data obtained were analyzed by frequencies, percentage, t-test, ANOVA, and multiple regression, and the results were as follows: 1. The total sample consisted of 133 elderly. Of them, 47 elderly (35.4%) showed significant depressive Symptoms. 2. The GDS score was the highest for the group over 85 years of age (p < 0.05). Those living alone or widowed showed lower GDS score than those living with someone or married (p < 0.05). 3. The GDS score was the highest in the absolutely dependent group, followed by the partially dependent group, and the independent group (p < 0.01). The elderly who perceived their health Status as excellent showed the lowest GDS score. In contrast, those who had more than five chronic diseases showed the highest GDS score. 4. The elderly receiving financial and emotional support from their family or friends showed lower GDS score compared to those without any support. 5. The economically dependent group showed higher GDS score than that of independent group. 6. The elderly who involved in leisure activities showed lower GDS score than those without any involvement. 7. In terms of risk factors for depression, we found that perceived health Status, subjective economic Status, leisure activities, living arrangement and financial support were inversely associated with GDS score, whereas labor support was positively associated with GDS score. Based upon the above findings, this study suggests that these risk factors for depression in the elderly should be taken into consideration for a comprehensive mental health program for the elderly living in the rural area.

방사선조사가 백서 법량질형성 과정에 미치는 영향에 관한 연구

최순철,유동수,최현배,박태원 大韓口腔顎顔面 放射線學會 1997 Imaging Science in Dentistry Vol.27 No.1

The purpose of this study was to investigate the radiation effect on the stages of amelogenesis. Twenty 11-day-old rats which were irradiated by 4Gy of gamma radiation on the 19th prenatal day were used for the experimental group and twenty 11-day-old rats which were not irradiated were used for the control group. The length of each zone of amelogenesis were measured on the sagittal section using a light microscopic enlargement at 400 x the normal view while the morphologic changes of ameloblasts of each zone were observed electron-microscopically. The obtained results were as followed: 1. The length of the region of facing pulp and facing dentin of the zone of presecretion were increased by 11.5%(p<0.05) and 17.7%(p<0.01), respectively. 2. The length of the zone of secretion was increased by 17.3%(p<0.01), but the zone of maturation was decreased by 15.3%(p<0.01). 3. The total length of the zone of amelogenesis was not changed significantly(p>0.05). 4. Electron-microscopically, enlargement of the cell membrane, rER, mitochondria, and nuclear membrane were observed. These changes were mostly severe in the zone of maturation.

SM 45C강과 SS 41강의 미세조직과 파괴인성

최기순,김현철,임병수 成均館大學校 科學技術硏究所 1997 論文集 Vol.48 No.1

The effect of microstructure on fracture toughness of SM 45C steel and SS 41 steel has been investigated. Values of fracture toughness were measured in, each specimen of different microstructure and the investigation was carried out to find out the relationship between fracture toughness and microstructure. Fracture toughness increases with increasing grain size and spacing of the second phase(Fe_3C) particles in SM 45C. Strength ratio and toughness increased with increasing grain size and spacing of the second phase(Fe_3C) particles in SS 41 steel.

정상군과 비만군의 건강생활 행위와 고지혈증, 혈압, 혈당 관련 연구

최영철,남철현,이송권 경산대학교 보건복지연구소 2000 保健福祉硏究 Vol.5 No.-

This study was conducted to examine lipid, blood pressure, glucose, and health behavior of normal people and obese people. The normal people and obese people received health examination in K and D hospitals. The normal group was composed of 243 men and 191 women, while the obese group was composed of 194 men and 190 women. Data were collected from May, 1999 to Decomber, 1999. The results of this study are summarized as follows. 1. Male was 56.0% and female was 44.0% in the normal group, while male was 50.5% and female was 49.5% in the obese group. In the case of age, in the normal group 24.9% was in twenties, 15.4% was in thirties, 16.4% was in forties, 18.9% was in fifties, and 24.4% was in sixties and over. In the obese group 14.1% was in twenties, 16.4% was in thirties, 21.4% was in forties, 23.7% was in fifties, and 24.4% was in sixties and over. 2. According to the distribution of lipid, blood pressure, and glucose by sex, the normal group displayed significant difference in BMI, triglyceride, high density lipoprotein (HDL) cholesterol, SBP, and DBP, while the obese group showed significant difference in BMI, triglyceride, SBP, and DBP. 3. In the case of the distribution of lipid. Blood pressure, and glucose by age, the normal group revealed significant difference in BMI, total cholesterol, triglyceride, low density lipoprotein (LDL) cholesterol, SBP, and DBP, shile the obese group displayed significant difference in BMI, total cholesterol, SBP, and DBP. 4. According to health behavior of the normal group and the obese group by sex, male showed significant difference in favorite food (p<0.05), while female displayed significant difference in eating habit (p<0.05). 5. The factors which significantly influenced BMI were SBP (p<0.05), total cholesterol (p<0.001), triglyceride (p<0.001), times of eating meat (p<0.05), and exercise (p<0.05). As seen in the above results, the obese group showed higher lipid, blood pressure, and glucose than the normal group. It seemed that especially, the lack of exercise, the unbalanced diet, and eating of meat affected obesity. Drinking and smoking had harmful influence on lipid, blood pressure, and glucose, It appeared that adequated exercise helped them prevent geriatric disease. It can be said that the diseases related to obesity will increase due to change in socio-economy and diet. It is important to prevent obesity through clinical test related to obesity and heal education.

척수 동정맥 기형 : 증례보고 Case Report

최원철,강재규,도종웅,정현태,문성수 최신의학사 1991 最新醫學 Vol.34 No.12

광도 변화가 광중합형 컴포머와 컴포짓트 레진의 중합도 및 불소 유출에 주는 영향

최재윤,이해형,임범순,이용근,신현철 大韓齒科器材學會 2004 대한치과재료학회지 Vol.31 No.4

The purpose of this study was to investigate the fluoride releasing behavior of one self-curing glass-ionomer (Fuji II), one light-curing glass-ionomer (Fuji II LC), three compomers (PrismaFlow, UniFil F, and Dyract AP) and SIX composite resins (Flowline, Fissurit FX, Flow-It, Wave, Heliomolar Flow, and Glacier) as a function of light intensity. Disk type specimens were stored in deionized water at 37℃ for 1, 2, 4, 8 hrs and 1, 2, 7, 14, 21, 28 days. The deionized water was changed after measurements. The amount of fluoride ion, which was released from specimens, was measured by pH/ISE Meter (Istek Model 730P, Korea) with fluoride electrode. The results were statistically compared by Tukey multiple comparisons test (p=0.05). There were significant differences in degree of polymerization between specimens with 1 hr after irradiation and those with 24 hrs after irradiation (p<0.05). The cumulative amount of fluoride released was decreased with increasing light intensity (or degree of polymerization). The fluoride-releasing patterns of specimens were significantly different (p<0.05).

인접행렬의 고유벡터 성분비를 이용한 공간 분석 : Spatial Configuration Analysis Using the Eigenvector Ratio of Adjacency Matrix

최재필,조형규,최현철,황용하 대한건축학회 2003 대한건축학회논문집 Vol.19 No.11

The purpose of the ERAM model proposed in this paper is to analyze the spatial importance immanent in the intrinsic structure of spaces. Use of the adjacency matrix representing the connection of spaces makes it possible to analyze the spatial structure itself. On the assumption that a large number of people move continually at random in the system, the ratio of elements in any row of the n-th power of the adjacency matrix means the ratio of people of all nodes in equilibrium. Mathematically, it is the ratio of eigenvector corresponding to the dominant (maximum) eigenvalue, Therefore it is the attribute immanent in the structure of spaces itself. Moreover, it is possible to consider the relative level of attraction of spaces and the relative flow from spaces to spaces only by putting the gravity on the adjacency matrix. The ERAM model brings forth the flexible result reflecting the relativity of spaces and flows.

회야강(울산)의 식물플랑크톤 군집구조

최철만,배진현 한국환경과학회 2002 한국환경과학회지 Vol.11 No.3

This study was conducted to find the structure of phytoplankton community in the Hoeya river(Ulsan) from March 2000 to February 2001. The taxa of phytoplankton identified included 135 species, 5 divisions, 33 families and 82 genera. Among them, chrysophyta(diatoms) were 63 species(46.7%), chlorophyta(green algae) 47 species(34.8%), pyrrophyta(dinoflagellates) 13 species(9.6%), cyanophyta (cyanobacteria) 8 species(5.9%) and euglenophyta(euglenoids) 4 species(3.0%) respectively. Ecological important species is called frequently appearing species, red tide causative species, seawater species and pollution indicator. 22 species including Aulacoseira granulata were recorded frequently appearing species. 19 species including Ceratium furca were recorded as red tide causing species. And the pollution indicators were 33 species including Actinastrum hantzschil var. fluviatile. The highest standing crops were 3,103,441 cell/ℓ in August at the RW-1 and the lowest 1,245 cell/ℓ in January at the RW-5. In the community analysis, the dominanance indices ranged from 0.34(October, RW-2) to 0.94(January, RW-1) and the diversity indices from 0.50(May, RW-2) to 2.57(September, RW-2). The saprobic indices were 2.43 in RW-1, 2.41in RW-2, 2.375 in RW-3, 2.40 in RW-4, 2.43, in RW-5. Therefore, these areas were investigated "β-mesosaprobic". According to the similarity index among the stations, these areas were defined as residential district areas(RW-2 and RW-3), lower part of the dam (RW-1) and seawater areas(RW-4 and RW-5).

편의점(CVS)의 포장디자인 전략에 관한 연구

최영규,김용우,김현철 서울保健大學 1997 論文集 Vol.17 No.1

Recently according to the individualization and differentiation in consumers` lifestyles, there are many changes in the distribution types of products. Especially owing to the increase of women in the work force, the single population and the night active population, in the past few years the rapidly growing convenience stores are becoming fixture in our society as a popularized retailer. Accordingly, going beyond the primary role of preserving contents and protecting quality, package design at a convenience store, on the premise of it being self-service, serve as a means of sales promotion strategy, to induce the purchase by communicating information and favorable image to the consumer. Developing package design with consideration to these special features of a convenience store must be improved by satisfying the following points: · to produce positive corporate image by developing private brands for a differentiation strategy. · to induce impulse buying owing to direct advertising by developing package designs which considers P.D.P. functions. · to stimulate the consumers` desire to purchase and to revitalize the store atmosphere by package design which maximizes effects of the displays. · to produce brand logotypes that has outstanding communicative properties and that can be long remembered. · to develop a color strategy which suggests a product's features, can touch the consumer's sensibility, and can minimize stress to the eyes. · to produce a systematic layout which leads to visual order of detail design elements.