• 한국응용곤충학회지
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• 제43권4호
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• pp.297-304
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• 2004

진디혹파리(Aphidoletes aphidimyza Rondani 1847)의 발육실험 조건은 $15-35^{\circ}C,\;65{\pm}5\%$ RH, 광조건은 16L:8D이었다. 알에서 번데기 기간까지 종합한 발육기간은 $15^{\circ}C$에서 43.9, 44.5일이였고, $25^{\circ}C$에서 14.3, 15.8일이였으며, 발육영점온도는 10.7, $10.0^{\circ}C$이고, 유효적산온도는 210.8, 245.5일도였다. 두 종의 진딧물을 먹이로 한 온도별 발육율은 변형된 Sharpe와 DeMichele의 비선형모형에 잘 적합되었다. 진디혹파리의 발육 단계별 발육완료 시기 분포 모형을 생리적 연령을 이용하여 Weibull function으로 보았을 때 알${\to}$유충${\to}$번데기 순으로 점차 발육 완료가 짧은 기간에 이루어지는 것을 볼 수 있었고 적합도를 나타내는 $r^2$은 0.86-0.93, 0.85-0.94로 누적 발육율을 비교적 잘 보여주고 있다. 성충 수명은 $15^{\circ}C$에서 8.7, 9.2일이였고 $30^{\circ}C$에서 3.1, 2.7일이였다. 이들 결과를 종합해 보면 알 기간에서 $35^{\circ}C$의 경우 발육기간은 짧았으나 부화율이 $50\%$ 미만으로 낮았고, 유충은 $35^{\circ}C$에서 번데기에 이르지 못하고 모두 사망하였고 $30^{\circ}C$에서는 발육기간이 길어져 $30^{\circ}C$이상에서는 유충과 번데기가 부의 영향을 받아 기존의 보고와 상이하였다. 또한 성충수명에서 $15^{\circ}C$의 경우 성충수명은 길었으나 케이지 내에서 움직임이 전혀 없었고, 산란 또한 하지 않았으며 $30^{\circ}C$에서도 성충기간이 짧아 산란 수가 아주 적거나 없을 것으로 생각된다. 따라서 진디혹파리를 진딧물 방제에 이용할 경우 성충이 자유롭게 움직이며 산란할 수 있는 $20^{\circ}C$이상 $30^{\circ}C$ 미만의 온도가 좋을 것으로 생각한다.

• 대한한방종양학회지
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• 제4권1호
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• pp.211-232
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• 1998

Because there were lots of side effects and tolerances to the existing anticancer therapeutics, the experiment extracting the anticancer effect from medicinal herbs is in progress liviely. Therefore the purpose of this study were to research the tendency and the course of anticancer studies. To research the tendency of anticancer studies, medicinal herbs of fifty three experimental papers were analyzed and to examine the course of studies, anticancer papers in the medical world were used. The obtained results were as follows: Methods of herbal medicinal treatments were elimination the pathogenic factor(祛邪) and supporting healthy energy(扶正) method used. In this study, immediately tumor bearing and immune response were the most important point. The subject of immediately tumor bearing was not in the specific cancer but in the influence on the life span of general cencerous cells. In the experimental study of immune response, the effect on NK cell activity of medicinal herbs most studied. The combined usage of medicinal herbs and anticancer agent mostly intended to know whether it inhibits the tumor cell growth. The serum test and blood cell number test show if medicinal herbs inhibit side effect of anticancer agent. More than 80 percents of used medicinal herbs, there were anticancer activities. However anticancer experimental studies using medicinal herbs two weak points. The one, it was difficult to choose a prescription according to differentiation of symptoms and signs(辨證論) of the Oriental Medicine, because we put to the test not a man but a mouse. The other, as we observed the indirect effect of the whole physiological regulation caused by synergic effects of the complex prescription, we don't understand the detailed mechanism of the herb. Therefore, if the anticancer effect of the herb is proved the experiment, we should research the concrete medical action of medicinal herbs and immunological analysis of herbal medicines to the body.

• Earthquakes and Structures
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• 제24권4호
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• pp.275-288
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• 2023

Based on the crucial role of high-speed railway bridges (HSRBs) in the safety of high-speed railway operations, it is an important approach to mitigate earthquake hazards by proceeding with seismic risk assessments in their whole life. Bridge seismic risk assessment, which usually evaluates the seismic performance of bridges from a probabilistic perspective, provides technical support for bridge risk management. The seismic performance of bridges is greatly affected by the degradation of material properties, therefore, material damage plays a nonnegligible role in the seismic risk assessment of the bridge. The effect of material damage is not considered in most current studies on seismic risk analysis of bridges, nevertheless. To fill the gap in this area, in this paper, a nonlinear dynamic time-history analysis has been carried out by establishing OpenSees finite element model, and a seismic vulnerability analysis is carried out based on the incremental dynamic analysis (IDA) method. On this basis, combined with the site risk analysis, the time-dependent seismic risk analysis of an offshore three-span HSRB in the whole life cycle has been conducted. The results showed that the seismic risk probabilities of both components and system of the bridge increase with the service time, and their seismic risk probabilities increase significantly in the last service period due to the degradation of the material strength, which demonstrates that the impact of durability damage should be considered when evaluating the seismic performance of bridges in the design and service period.

• 지역사회간호학회지
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• 제6권1호
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• pp.55-73
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• 1995

An Effect of Muscle Strength Training Program on Muscle Strength, Muscle Endurance, Instrumental Activities of Daily Living and Quality of Life in the Institutionalized Elderly Recent statistics shows that the aged are the fastest growing segment of our population by increasing life span. The age group of over 60 shows multiple health problems and the most serious handicapping problem of these. are related to the changes in muscular skeletal system. With aging, people lose. their muscle mass and muscle strength resulting from biological changes and physical inactivity. Studies documented a 30-50% loss of muscle mass in an advanced age and thus, ordinary life activities can be seriously affected due to weakened muscle strength. Preservation of muscle strength of lower limb is especially important in the aged. Since it is readily affected from reduced physical activity in old age, sometimes to the detriment of moving or walking. So muscle strength exercise program designed for the elderly to improve leg muscle strength and leg muscle endurance. The research design used was nonequivalent control group pretest - protest design. The purposes of this study were to test the effect of muscle strength exercise program utilizing Leg Press on muscle strength, muscle endurance, instrumental activities of daily living(IADL), cognitive perceptual variables and quality of life. Forty nine subjects participating in this study consisted of twenty four male and twenty five female. Twenty four experimental group subjects were selected from C-institution in Chung Buk province, and twenty five control group subjects were selected from O-institution in Chung Nam province. The mean age of subjects was 72.8 years. Muscle strength training program utilizing Leg Press for the experimental group was carried out three times a week for 9 weeks. The data was collected from August, 1993 to October, 1993. Data were analyzed with $X^2-test$, t-test, ANCOVA test, Kruskal Wallis 1-Way ANOVA test using SPSS PC program. Results were obtained as follows : 1) The experimental group showed significantly higher scores on muscle strength (leg lift strength, back lift strength and grip strength) and muscle endurance than control group after the experiment $\ulcorner$F=52.35(p=.001), F=54.07(p=.001), F=6.97(p=.011), F=18.17(p=.001)$\lrcorner$ 2) Experimental group were significantly higher scores on IADL than control group(F=7.51, p=.009). 3) Experimental group showed significantly higher scores on economical state and self esteem aspects of the quality of life scale than control group $\ulcorner$F=10.59(p=.002), F=6.97(p=.011)$\lrcorner$. But there were no differences in emotional state, physical and functional state and relationship with reatives in the quality of life between groups. 4) Scores on IADL showed a significant difference with the level of muscle strength and muscle endurance $\ulcornerx^2=7.73(p=.025),\;x^2=8.86\;(p=.011)\lrcorner$ 5) Scores on self esteem and physical and functional state aspects of the quality of life scale showed a significant difference with the level of IADL $\ulcornerx^2=11.39(p=.003),\;x^2=9.02(p=.011)\lrcorner$. 6) Scores of experimental group after the experiment in cognitive perceptual variables (perceived benefit on exercise, perceived health status, self efficacy, emotion on exercise) were significantly higher than those of control group $\ulcorner$F=32.09(p=.001), F=5.07(p=.029), F=20.63 (p=.001), F=30.38(p=.001)$\lrcorner$. As a result of this study, the effect of strength training exercise program with Leg. Press had improved muscle strength, muscle endurance, IADL, and the perception of self esteem, physical and funtional state, and economical state. Thus strength training program could be beneficially applied for the prevention of disablity and promotion of health and wellbeing in the aged easily and safely. The subjects in the experimental group have maintained their exercises till six months after the cessation of the experiment. This seem to illustrate that changes in cognitive perceptual variables and the improvement in health status have reinforced motivation for the continuation of voluntary exercises. A further study is necessary to determine the factors affecting maintainance of muscle strength exercise and to assess the effect of weight training program on bone density.

• 대한한의학회지
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• 제31권3호
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• pp.34-46
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• 2010

Objective: This experimental study was performed to examine if Hang-Am-Dan non-boiled water extracts (HAD-N) induce apoptosis in human lung carcinoma NCI-H460 cells in vitro and inhibits the growth of NCI-H460 cell-transplanted solid tumor in vivo. Materials and Methods: We cultured NCI-H460 cell lines and xenografted them to nude mice. The mice were divided into 3 groups, NCI-H460 cell alone, NCI-H460 + 90 mg/kg HAD-N treated group, and NCI-H460 + 180 mg/kg HAD-N treated group, with seven mice per group. HAD-N was orally administrated every day for four weeks. We checked their body weight and tumor weight and volumes two times a week and their absolute organ weight and biochemical blood analysis at the final day by sacrificing them. We also calculated their tumor inhibition rate (IR), mean survival time and percent increase in life span (% ILS). Results: In this study, we observed that all of the HAD-N treated mice got smaller tumors. The more doses of HAD-N used, the less IR showed at the 8th day after starting this experiment. Tumor weight and volume of HAD-N treatment groups also decreased. Mean survival time and percent increase in life span (% ILS) in the high-dose HAD-N treatment groups were higher than those of other groups. The test substances in the blood level UN results showed reduction in the significance in both HAD-N 90 mg/kg and HAD-N 180 mg/kg (p<0.01). The blood level phosphatase results in HAD-N 90 mg/kg group compared to NCI-H460 cell alone group showed a reduction in significance (p<0.05). AST levels HAD-N 180 mg/kg group compared to NCI-H460 cell alone group significance as well (p<0.05). Conclusion: We suggest that the results of the in vivo study showed that HAD-N may have potential as a growth inhibitor of tumor-induced NCI-H460 of nude mice in spite of the shortcomings of this study. More studies to overcome those shortcomings and to find out significant antitumor mechanism will be needed.

• 한국응용곤충학회지
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• 제40권4호
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• pp.297-300
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• 2001

감꼭지나방의 온도별(15, 20, 25, 3$0^{\circ}C$)발육과 생식에 미치는 영향을 조사하였다. 알에서 성충까지의 발육기간은 2$0^{\circ}C$에서 96.1일, $25^{\circ}C$에서 43.2일, 3$0^{\circ}C$에서 34.6일이 걸렸다. 15$^{\circ}C$에서는 유충기간중 모두 사망하였다. 발육영점온도는 알, 유충, 번데기, 알~성충이 각각 12.2, 13.5, 13.8, 13.4$^{\circ}C$였다. 유효적산온도는 알, 유충, 번데기, 알~성충이 각각 74.0, 331.3, 160.5, 569.9일도 이었다. 부화율, 용화율 및 우화율은 $25^{\circ}C$에서 가장 높았다. 산란전 기간과 성충수명은 2$0^{\circ}C$에서 12.6일과 29.3일이며, $25^{\circ}C$에서는 3.8일과 8.6일, 3$0^{\circ}C$에서 2.5일과 7.0일이었다. 1세대에 요하는 평균기간(T)은 온도가 높아질수록 짧았으며, 순증식률(R$_{o}$ )은 2$0^{\circ}C$와 3$0^{\circ}C$에서 낮았다. 내적자연증가율(r$_{m}$ )은 $25^{\circ}C$에서 0.066로 가장 크게 나타내었다.

• 한국가정과교육학회지
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• 제17권1호
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• pp.113-129
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• 2005

본 연구는 '건강한 가족 만들기'에 초점을 맞춘 가족생활교육 프로그램과 교육 자료를 개발해 첫째, 학습자에게는 현재 및 미래에 건강한 가족을 만들기 위한 자신의 역할과 책임을 인식하고 실천력을 기르는데 도움을 주고자 하는데 있다. 둘째, 학교에서의 가족생활교육자에게는 교수-학습과정안, 학습활동지, 교사참고자료 학생배부자료, 수행평가자료, 학생들이 창안한 학습 결과물 등 다양한 학습 자료를 제공함으로써 교수활동에 도움을 주고자 하는 데 있다. 이를 위해 고2-3학년의 심화$\cdot$선택 교과인 '가정과학' '가족생활' 영역의 교과내용 분석. 학습자가 가족$\cdot$가정생활에서 길러야 하는 능력, 미국 유타주 '성인의 역할과 책임'에 초점을 둔 가족생활교육 프로그램, NCFR의 ·생애주기별 가족생활교육 개념 틀'을 기초로 '가족생환'영역의 단원을 '자기관리 능력 기르기'. '의사소통 능력 기르기', '건강한 가족 만들기', '위기관리 능력 기르기', '현명한 부모 되기' 등으로 재구성했다. 또한 이를 효과적으로 학습하기 위해 다양한 학습자료를 개발했다. 이 연구를 바탕으로 '행복한 결혼생활하기', '현명한 가정관리자 및 소비자 되기' 등의 내용이 보완된 후속 프로그램 개발이 필요하다.

• 한국산학기술학회논문지
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• 제20권4호
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• pp.371-381
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• 2019

본 연구는 은퇴를 주로 부정적인 생애사건으로 분류하였던 기존 인식에서 벗어나 보다 긍정적인 관점에서 다루고자 하였다. 취업자를 참조집단으로 하여, 은퇴자의 은퇴 만족 여부(만족 은퇴, 불만족 은퇴)가 삶의 만족도에 어떠한 영향을 미치는지를 살펴보고, 성별에 따른 차이를 검증하였다. 연구대상은 1~2차년도 고령화연구패널조사(KLoSA) 참여자 중 45세 이상의 취업자 1,886명, 은퇴자 723명으로 총 2,609명이며, 은퇴자는 1~2차년도 지속적 불만족 은퇴자와 만족 은퇴자로 구분하였다. 연구방법은 SPSS 21.0을 사용한 중다회귀분석을 실시하였으며, 남녀 집단 간 차이를 보다 명확히 하기위해 성별에 따른 회귀계수의 차이를 Mplus 7.3을 사용하여 다집단 분석(Multi-Group Analysis)을 통해 검증한 뒤, Wald-Test를 실시하였다. 본 연구결과에 따르면, 불만족 은퇴자와 만족 은퇴자의 삶의 만족도는 상반되는 것으로 나타났다. 즉, 은퇴에 불만족할 경우 취업자보다 삶의 만족도는 낮은 반면, 은퇴에 만족할 경우 오히려 취업자보다도 삶의 만족도가 높다는 결과가 도출되었다. 또한, 남녀 모두 불만족 은퇴자는 취업자보다 삶의 만족도가 낮았고, 이 효과는 여성에게서 더 큰 것으로 나타났다. 그러나 여성의 경우 만족 은퇴자의 삶의 만족도는 취업자보다 높은 반면, 남성의 경우 이러한 영향력이 유의미하다는 증거가 발견되지 않았다. 본 연구결과를 바탕으로 은퇴자 집단의 이질성 및 생애과정에서의 성차에 대한 논의가 이루어졌다.

• 전자공학회논문지 IE
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• 제47권2호
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• pp.32-37
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• 2010

본 연구에서는 초소형화의 욕구와 우수한 신뢰성을 가진 일체형 SMD 인덕터 코어를 개발하기 위하여 전력값에 따른 온도 특성을 분석하였다. 전자부품의 온도가 상승하면 소자의 정상적인 동작을 보장하기 힘든 기능적 장애를 가져오고, 부품의 고장율을 높여 수명을 단축하게 된다. 또한, 열응력이나 열팽창에 의하여 부품에 충격을 주고 오동작을 일으키게 되어 신뢰성에 많은 영향을 미치게 된다. 일체형 SMD Inductor Core를 주위온도와 소자온도 차에 의한 온도상승을 측정하였으며, 각 전력값에 따른 온도 특성을 통해서 안정된 전력값을 얻을 수 있었고, 측정된 직류 전류와 저항 $R_dc$를 이용하여 시뮬레이션한 결과 40[$^{\circ}C$]의 온도 상승분에서 양호한 정격 전류값을 찾을 수 있었다.

• 한국환경과학회지
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• 제13권5호
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• pp.449-467
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• 2004

Interannual and decadal scale changes in body size of Pacific saury, catch and catch per unit effort were examined to investigate the environmental effects on the stock structure and abundance in the Tsushima Warm Current region. Interannual changes in thermal conditions are responsible for the different occurrence (catch) rates of sized group of the fish. Changes in body size due to environmental variables lead the stock to be homogeneous during the period of high abundance, while one of the reminder cohorts supports the stock during the period of low level of abundance. Migration circuits of two cohorts of saury stock are hypothesized on the basis of short life span and spatio-temporal changes of the stock structure in normal environmental conditions. Changes in upper ocean structure and production cycles by the decadal scale climate changes lead changes in stock structure and recruitment, resulting in the fluctuation of saury abundance. Hypothesized mechanism of the effects of climate changes on stock structure and abundance is illustrated on the basis of changes in thermal regime and production cycle.