• 한국환경생태학회지
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• 제20권2호
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• pp.188-199
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• 2006

본 연구는 가야산국립공원 홍류동 계곡 소나무림의 생태적 특성 및 기존 소나무림에 대한 15년간 식생구조 변화 실태를 분석하여 소나무림 보전관리방안의 기초자료 제공을 목적으로하였다. 소나무림내에 20개 조사지(단위면적: $500m^2$)를 설정하여 TWINSPAN 분석결과 7개 군집유형으로 구분되었으며 교목층에서는 소나무, 아교목층에서는 서어나무, 굴참나무, 졸참나무, 관목층에서는 조릿대, 진달래, 개옻나무 등이 우점종이었다. 샤논의 종다양도는 $0.6803{\sim}1.2559$이었고 출현종수는 $27{\sim}40$종이었다. 15년간 식생구조 변화 분석결과 상대우점치는 아교목층에서 서어나무, 졸참나무, 굴참나무의 세력이 증대되었다. 샤논의 종다양도는 $0.2608{\sim}1.0124$에서 $0.5547{\sim}1.2567$로 출현종수는 $14{\sim}26$종에서 $26{\sim}34$종으로 증가하였다.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2001년도 춘계학술대회 논문집
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• pp.121-124
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• 2001

Using ordors with the different concentration of essential oils, e studied the effect of a pleasant olfactory stimulation on physiological responses. we examined psychological response, mental task and changes in cardiac, immunity and EEG in responses to 150times solution (feel easily) and 500times solution (feel with difficulty) which of essential oil (called PCK) were diluted in propylene glycol, and neutral (water). The 150times solution that was felt pleasant produced significant differences (p<0.05) in relative power change of beta activity in the left frontal region (Fp1, F3, F7) of the brain, and heart rate (HR) deceleration after mental task. these results are consistent with substantial research that has documented cardiac and EEG responses to pleasant stimuli. What is more, 150times solution increased the concentration of s-IgA know as an index of immunity.

• Toxicological Research
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• 제18권1호
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• pp.87-98
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• 2002

This study was conducted to evaluate the safety of a recombinant human Factor VIII(GC-$\gamma$ AHF) manufactured by Korea Green Cross Company with different technology according to the Regulation of Korean Food and Drug Administration (l 998. 12. 3). In acute toxicity test, both genders of Sprague-Dawley rats and Beagle dogs were administered intravenously with GC-$\gamma$ AHF of three doses (3,125, 625 and 125 IU/kg), and single dose of 3,125 IU/kg, respectively. No dead animal and abnormal autopsy findings were found in Control and GC-$\gamma$ AHF treated group. Therefore, the 50% lethal dose ($LD_{50}$) of GC-$\gamma$ AHF was conidered to be higher than 3,125 IU/kg in rats and dogs. In the four weeks repeated intravenous toxicity study, GC-$\gamma$ AHF was administrated intravenosly to both genders of rats and dogs with 3 doses (500, 150, 50 IU/kg). There were neither dead animals nor significant changes of body weights during the experimental Period. In addition, no significant GC-$\gamma$ AHF related changes were found in clinical sign, urinalysis and other finding. Statistically changes were observed in hematological, biochemical and organ weight parameters of treated groups: however these changes were not dose dependent. No histopathological lesion were observed in both control and treated animals. Above data suggest that no observed adverse effect level of test materials in rats and dogs might be over 500 IU/kg/day in this study. In ocular irritation test, any injury on iris, conjunctiva and cornea in rabbits were not observed. The acute ocular irritation index (A.O.I.), mean ocular irritation index (M.O.I.) and Day-7 individual ocular irritation Index (I.O.I.) of GC-$\gamma$ AHF were 0. In the primary skin Irritation test, the primary irritation index (P.I.I.) oj GC-$\gamma$ AHF were 0. Therefore, the GC-$\gamma$ AHF is considered not to have the primary skin and eye toxicity in rabbits. In active systemic anaphylaxis (ASA) test, GC-$\gamma$ AHF and GC-$\gamma$ AHF emulsified with Freund's complete adjuvant (FCA) did not induce any symptom of anaphylactic shock in guinea pigs. In passive cutaneous anaphylxis (PCA) test, after sensitization with antisera of GC-$\gamma$ AHF sensitized mice, blue spots were observed on the hypodermis of back of rats, but diameter of each spot was smaller than 5 mm in each test groups except the positive control group. Based on the results of this study, GC-$\gamma$ AHF is not conidered to have any antigenic potential. In conclusion, at levels of up to 500 IU/kg, GC-$\gamma$ AHF did not produce treatment-related toxicity under the conditions of these acute-, four week repeated-toxicity, primary skin and eye toxicity, and antigenicity test.

• 동아시아식생활학회지
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• 제27권5호
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• pp.500-511
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• 2017

This study was conducted to investigate the anthropometric data, bone density, serum profiles, nutrient intakes and diet quality of premenopausal and postmenopausal women. For the study, we obtained data for analysis from the combined 2008~2011 Korean National Health and Nutrition Examination Survey (KNHANES). The height and weight were 157.8 cm and 58.7 kg in premenopausal women and 155.5 cm and 58.3 kg in postmenopausal women, respectively. The obesity rate was 27.49% in premenopausal women and 34.98% in postmenopausal women (p<0.001). Total cholesterol, LDL-cholesterol, triglyceride, GOT, GPT and alkaline phosphatase in postmenopausal women were significantly higher than those in premenopausal women (p<0.001). The prevalence of osteoporosis was 0.0~0.89% in premenopausal women and 0.48~13.22% in postmenopausal women (p<0.001). In postmenopausal women, rates of hypertension, stroke, myocardial infarction, depression, and diabetes were significantly higher than those in premenopausal women. Water, fat. ash, sodium, retinol, thiamin, riboflavin and niacin intakes in premenopausal women were significantly higher than those in postmenopausal women. Water, fiber, Ca, and, K intakes were below KDRIs (Dietary Reference Intakes for Koreans) in both groups. The mean adequacy ratio (MAR) of premenopausal women was higher than that of postmenopausal women (p<0.001). The index of nutritional quality (INQ) in premenopausal women was also higher than that of postmenopausal women except iron and vitamin C. Therefore dietary guidelines and an education program should be developed for desirable improvement of health, bone density, nutrient status and dietary quality of postmenopausal women.

• 한국자원식물학회지
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• 제37권2호
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• pp.137-148
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• 2024

본 연구는 참나물[Pimpinella brachycarpa (Kom.) Nakai] 자생지에 대한 기상 및 토양 특성과 입지환경을 조사하여 자생지 보존에 필요한 정보를 얻고자 수행되었다. 참나물은 경기도, 강원도, 전라북도, 경상북도 등 국내 전역에 분포하며, 주로 해발고도 500 ~ 1,200 m의 그늘지고 습한 지역에서 생육하는 것으로 확인하였다. 자생지 기상특성 중 연평균 기온은 두타산이 13.1℃, 연평균 강수량은 중원산이 1,509 mm로 다른 지역에 비해 높았다. 토양 특성 중 pH는 4.42 ~ 4.97의 약산성, 질소전량(Total N)은 0.18 ~ 0.68%, 유효인산(available P)은 13.43 ~ 531.56 mg/kg까지 지역별 차이가 크게 나타났다. 자생지 내 종다양성지수(H')는 일월산에서 1.713으로 가장 높은 것으로 확인되었으며, 균등도(J')는 0.983 ~ 0.993, 우점도(D')는 0.007 ~ 0.017로 분석되었다. 유사도 지수는 평균 24.86%로 매우 낮았으며, 크게느릅나무 군락과 당단풍나무 군락으로 구분되었다. 상기 연구의 결과는 최근 이상기후에 의한 여름철 이상고온, 폭우 및 가뭄 등과 같은 환경적 재해에 의한 자생지 파괴 및 생육 감소와 같은 문제 해결에 기초자료를 제공하는 연구라고 판단된다. 또한 지속적인 식물자원의 보전 및 활용 방안에 관한 연구가 지속되기를 기대한다.

• Asia pacific journal of information systems
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• 제7권1호
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• pp.67-83
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• 1997

The utility of learning techniques in investment analysis has been demonstrated in many areas, ranging from forecasting individual stocks to entire market indexes. To date, however, the application of artificial intelligence to financial forecasting has focused largely on short predictive horizons. Usually the forecast window is a single period ahead; if the input data involve daily observations, the forecast is for one day ahead; if monthly observations, then a month ahead; and so on. Thus far little work has been conducted on the efficacy of long-term prediction involving multiperiod forecasting. This paper examines the impact of alternative procedures for extended prediction using knowledge discovery techniques. One dimension in the study involves temporal granularity: a single jump from the present period to the end of the forecast window versus a web of short-term forecasts involving a sequence of single-period predictions. Another parameter relates to the numerosity of input variables: a technical approach involving only lagged observations of the target variable versus a fundamental approach involving multiple variables. The dual possibilities along each of the granularity and numerosity dimensions entail a total of 4 models. These models are first evaluated using neural networks, then compared against a multi-input jump model using case based reasoning. The computational models are examined in the context of forecasting the S&P 500 index.

• 산업기술연구
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• 제20권B호
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• pp.219-226
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• 2000

In this paper, we propose a new novel method for similarity search that supports time warping. Our primary goal is to innovate on search performance in large databases without false dismissal. To attain this goal, we devise a new distance function $D_{tw-lb}$ that consistently underestimates the time warping distance and also satisfies the triangular inequality. $D_{tw-lb}$ uses a 4-tuple feature vector extracted from each sequence and is invariant to time warping. For efficient processing, we employ a multidimensional index that uses the 4-tuple feature vector as indexing attributes and $D_{tw-lb}$ as a distance function. We prove that our method does not incur false dismissal. To verify the superiority of our method, we perform extensive experiments. The results reveal that our method achieves significant speedup up to 43 times with real-world S&P 500 stock data.

• 치위생과학회지
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• 제13권4호
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• pp.493-500
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• 2013

본 연구는 최근에 크게 증가하고 있는 정신질환자의 구강건강 문제에 주목하여 그 실태를 파악하고자 시행하였다. 강원도 소재의 정신보건센터 한 곳의 주간 프로그램 참여대상자(23명)와 정신병원 한 곳의 입원 대상자(69명) 전체 92명을 편의집락추출하여 구강건강상태와 치주건강상태, 구강위생상태를 사정하였으며 수집된 자료를 비교 분석한 결과 다음과 같은 결론을 얻었다. 1. 상실치아(MT)는 병원 대상자(6.42)가 센터 대상자(1.83)보다 더 높았으나, 충전치아(FT)는 센터 대상자(4.78)가 병원 대상자(2.52)보다 높았다(p<0.05). DMFT index는 정신질환자(12.80)가 전국표본(6.22)에 비해 더 높았고, 연령이 높을수록, 학력이 낮을수록, 의료급여 대상자의 구강건강 상태가 더 나빴다(p<0.05). 2. 구강위생상태는 PHP index 3.41로 자가구강건강관리가 잘 이루어지지 않는 편이였다(p<0.05). 3. 치주건강 상태는 병원 대상자(81.7%)가 센터 대상자(47.6%)에 비해 치주요양필요자율이 더 높았으며, 특히 40대와 60대, 학력이 낮을수록, 가족이 없을수록 더 나빴다(p<0.05). 치주요양불필요자율(CPITN0)은 병원 대상자(18.3%)가 전국표본(27.4%)에 비해 낮았으며, 치주조기병치료필요자율(CPITN3)은 병원 대상자(13.3%)가 전국표본(5.7%)보다 더 높았다. 4. 정신질환자의 구강건강상태를 개선하기 위하여 치과위생사는 정신질환자의 구강건강 상태 증진을 위한 노력을 해야 하며, 이에 앞서 해당 집단 안에서 연령과 학력, 결혼유무, 가족 형태, 경제적인 상태 등을 선행조사할 필요가 있다. 또한 정신질환 종류와 심도별 인지능력을 고려하여 교육매체와 교육 프로그램을 구분하여 고안해야 한다. 한편 치과계에서는 정신질환자의 구강건강상태를 개선하기 위한 정책적인 방안을 마련하는 데에 점진적인 노력을 기울여야 하며, 주기적인 구강건강관리실태를 파악할 필요가 있다. 5. 본 연구는 접근이 어려운 정신질환자를 대상자로 선정하여 전반적인 구강건강상태를 측정하였다는 점에 그 의의가 있으나, 표본을 단일모집단으로 선정하였다는 점에 한계가 있다.

• The Journal of Asian Finance, Economics and Business
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• 제8권2호
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• pp.759-770
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• 2021

Using a DCC - GARCH model analysis, this paper examines the existence of financial contagion from the U.S. stock market to the Vietnamese and the Philippine stock markets during the global financial crisis and the COVID-19 pandemic crisis. We use daily data from the S&P 500 (U.S.), VN-Index (Vietnam), and the PSEi (the Philippines). As a result, there is no evidence of contagion from the U.S stock market to the Philippine stock market that can be found during global financial crisis, while the Vietnamese market is influenced by this effect. Besides, both these developing stock markets (the Vietnamese and Philippine stock markets) are influenced by the contagion effect in COVID-19 pandemic crisis. Another finding is that the contagion effect during the coronavirus pandemic crisis in Vietnam is smaller than that during the global financial crisis, however, the opposite is the case for the Philippines. It is noticed that the Philippines seems to be more affected by the contagion effect from the COVID-19 pandemic than Vietnam at the time of this study. Because financial contagion is important for monetary policy, asset pricing, risk measurement, and portfolio allocation, the findings in this paper may give some useful information for policymakers and investors.

• Journal of Biosystems Engineering
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• 제35권5호
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• pp.357-365
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• 2010

Workers in the agricultural industry have been exposed to many work-related musculoskeletal disorders. So, our objectives in this study were to measure and analyze worker's physiological bio-information to reduce musculoskeletal disorders in relation to agricultural works. We investigated worker's bio-information of physiological signals during the repeated lifting work such as body temperature, heart rate, blood pressure, physical activity, and heart rate variability. Moreover, we analyzed the workloads of lumbar spine during the repeated lifting work using the 3-axis acceleration and angular velocity sensors. The changes of body temperature was not significant, but the mean heart rate increased from 90/min to 116/min significantly during 30 min of repeated lifting work (p<0.05). The average worker's physical activity(energy consumption rate) was 206 kcal/70kg/h during the repeated lifting work. The workers' acute stress index was more than 80, which indicated a stressful work. Also, the maximum shear force on the disk (L5/S1) of a worker's lumbar spine in static state was 500N, and the maximum inertia moment was 139 $N{\cdot}m$ in dynamic state.