• 한국정보통신학회논문지
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• 제6권6호
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• pp.966-973
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• 2002

본 논문에서는 UML에 기반한 객체지향적 모형화에 의하여 인터넷에 기반한 원격 시험 시스템의 체계적인 분석 및 설계를 제시한다. 본 시스템은 기본적으로 교수가 문제를 출제하는 문제 출제부와 학생이 문제 에 응시하는 문제 풀이부로 구성된다. 객체지향에 기반하여 설계하고 설계과정에서 UML을 사용하여 설계 내용을 표현함으로써 객체지향적 설계의 장점인 체계적인 설계와 재사용성, 특정 프로그래밍 언어에의 의존성 등을 확보함으로써 개발과 테스팅, 수정, 보완에 있어서 효율성과 비용 절감을 얻을 수 있다. 또한 본 논문에서의 원격 시험 시스템은 원격 교육 시스템에 적용시킬 수 있으며, 기존의 오프라인 시험의 대치 또는 인터넷에 기반한 설문조사를 시행하는 시스템으로의 전환도 가능하여 다양한 분야에 적용이 가능하다.

• 한국전기전자재료학회논문지
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• 제13권8호
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• pp.711-717
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• 2000

Effect of alloying element additions to Ag on thermal conductivity electrical conductivity and mechanical properties of sheath materials for BSCCO tapes has been characterized. The thermal conductivity at low temperature range(10~300K) of Ag alloys were evaluated by both direct and indirect measurement techniques and compared with each other. It was observed that thermal conductivity decreased with increasing the content of alloying elements such as Au, Pd and Mg. Thermal conductivity of pure Ag at 30 K was measured to be 994.0 W/m.K on the other hand the corresponding values of A $g_{0.9995}$/M $g_{0.0005}$, A $g_{0.974}$/A $u_{0.025}$/M $g_{0.001}$, A $g_{0.973}$/Au.0.025//M $g_{0.002}$, and A $g_{0.92}$/P $d_{0.06}$/M $g_{0.02}$ were 342.6, 62.1, 59.2, 28.9 W/m.K respectively indicating 3 to 30 times lower than that of pure Ag. In addition alloying element additions to Ag improved mechanical strength while reduced elongation probably due to the strengthening mechanisms by the presence of additive atoms.s.

• Bulletin of the Korean Chemical Society
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• 제29권5호
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• pp.969-973
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• 2008

Solvent extraction using a Schiff-base, salen$(NEt_2)_2$, as a chelating agent has been conducted on several water samples to study the determination of trace Cu(II), Mn(II) and Zn(II). Experimental conditions for the formation and extraction of metal complexes were optimized with an aqueous solution similar in composition to the samples. The matrix difference between the sample and standard solutions was approximately matched, and the pH of each sample solution was adjusted to 9.5 with $NaHCO_3/NaOH$ buffer. The concentration of salen$(NEt_2)_2$ was $7.3\;{\times}\;10^{-3}$ mol/L, and the complexes were extracted into MIBK solvent followed by the measurement of AAS absorbance. The potential interference of concomitant ions was investigated, but no interference from alkaline and alkali earth ions was shown in this procedure. The given procedure is precise, as judged from the relative standard deviation of less than 5% for five measured data. The recovery of 93-103% shows that this method is quantitative for such trace metal analysis.

• 동의생리병리학회지
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• 제20권4호
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• pp.973-979
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• 2006

Cordyceps sinensis has been clinically used for the treatment of recovering fatigue, promoting the production of body fluid and qi, resolving sputum and arresting cough. Recent studies showed that Cordyceps sinensis produced immune-modulatory, anticarcinogenic and antioxidative effects. But, there are lack of studies regarding the effects of Cordyceps sinensis on the asthma. So, this study was performed to investigate the oral administrated effects of this herb against the disease. Asthma was induced to Balb/c mouse by i.p. injection and aerosol immunization with ovalbumin, and the change of the eosinophil number in the bronchoalveolar avage fluid(BALF) was observed. Concentrations of Interleukine-4(IL-4), Interleukine-5(IL-5) in BALF and splenocyte were assessed by ELISA, ImmunoglobinG(IgG) and ImmunoglobinE(IgE) from serum were calculated by same method. We found that the effects of Cordyceps sinensis in asthma mouse was implicated in reductions of IL-4, IL-S released from type2 T helper (Th2) cell, and decreases of IgE from plasma cell. These findings suggest that Cordyceps sinensis can produce anti-asthmatic effect, which may play a role in allergen-induced asthma therapy.

• Journal of Nutrition and Health
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• 제32권8호
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• pp.967-973
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• 1999

The purpose of this study was to analyze sensory evaluation, to assess visual serving size and plate waste estimates of daily menu, and the identify customer expectation, perception and satisfaction. Questionnaires of sensory evaluation, serving size and were waste were developed and hand-delivered to 2,520 people. A total of 2,255 questionnaires were usable: a 89.5% response rate. Customer satisfaction questionnaires were handed out to 700 customers: (100 each at seven operations). A total of 551 were returned completed (78.7%). The data was analyzed using the SAS package program for Descriptive Analysis, t-test and ANOVA. The result of sensory evaluation showed that 'taste' was 3.20, 'freshness' 3.17, 'temperature' 3.25, 'texture' 3.15, 'appearance' 3.12, 'overall evaluation' 3.21, so these were little higher than 「normal」, that is 3.0. There was positive correlation among 'taste', 'freshness', 'temperature', 'texture', 'appearance' and 'overall evaluation'(p<.001). Serving size score was 2.97 and plate waste was 4.87, thus plate waste percentage was about 22-33%. As the result of customer expectation, perception and satisfaction of menu quality, characteristics. Customer satisfaction was defined as the difference expectation and perception and customer perceptions in theis survey were lower than expectation, thus this result implied customers dissatisfied in all menu quality characteristics. IPA analysis showed that 'diversity of menu selection' and 'menu price' was included in A area 'Focus here'.

• 한국식품영양과학회지
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• 제27권5호
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• pp.973-979
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• 1998

This study was conducted to investigate the effectiveness of pumpkin powder in the diet of experimental animals on chemically induced stomach and mammary canceers. Three weeks old male SpragueDawley rats were randomly allocated to either 1) basal diet+MNNG, 2) basal diet+MNNG+PMC, 3) 2.5% pumpkin powder supplemented diet+MNNG+PMC, or 4) 5.0% pumpkin powder supplemented diet+MNNG+PMC for stomach cancer experiment. And female Sprague-Dawley(5 weeks old) rats were randomly assigned to either 1) basal diet only, 2) basal diet+DMBA, 3) 2.5% pumpkin powder supplemented diet+DMBA, or 4) 5.0% pumpkin powder supplementd diet+DMBA. In both experiments, supplements of pumpkin powder in basal diet decreased body weight of both male and female experimental animals. Pumpkin powder in rat diet decreased significantly(p<.05) chemically induced stomach cancer. With its suppressing effects on stomach cancer, pumpkin powder in diet of experimental rats had decreasing effects on the initiation and development of DMBA-induced mammary cancer. In conclusiion, current study may provide in vivo data to develop health foods using pumpkin. Further studies, however, are essential to clarify the exact role of pumpkin powder in chemically induced stomach and mammary cancers.

• 한국산학기술학회논문지
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• 제17권9호
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• pp.472-482
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• 2016

본 연구는 노인 손상의 발생이 특정 지역 내 공간의 안전성과 통계적으로 유의한 관계에 있는지를 실증하는 데 목적이 있다. 이러한 연구 목적 수행을 위해 퇴원손상심층조사와 지역안전지수 자료를 결합해 6,572명의 노인 손상환자를 대상으로 손상의도성, 손상발생장소, 손상 시 활동, 손상기전에 따라 지역안전등급의 평균 차이가 있는지를 독립표본 t-검정과 일원배치 분산분석을 통해 검증하였다. 통계 검증 결과 손상의도성의 하위집단별 지역안전등급의 평균 차이는 유의하지 않았으나, 손상발생장소는 화재(t=-2.513, p<.05), 교통(t=-2.387, p<.05), 안전사고(t=-3.627, p<.001), 자살(t=-3.364, p<.01)의 4개 분야에서 집단 간 평균 차이가 있었다. 손상 시 활동은 화재(F=5.972, p<.01), 자연재해(F=6.454, p<.01), 안전사고(F=11.726, p<.001)의 3개 분야에서 집단 간 평균 차이가 있었다. 손상기전은 화재(F=9.267, p<.001), 교통(F=7.759, p<.001), 안전사고(F=3.285, p<.05), 자살(F=8.973, p<.001), 감염병(F=3.109, p<.05)의 5개 분야에서 집단 간 평균 차이가 있었다. 이러한 분석 결과를 토대로 지역안전지수의 개별 분야를 연구 소재로 삼은 선행연구의 보고 내용과 비교해 논의한 후 공간의 안전성 차원에서 노인 손상의 발생을 사전에 예방하고 발생률을 억제하기 위한 3가지의 정책적 실천적 함의를 도출해 제시하였다.

• 한국식품영양과학회지
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• 제45권7호
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• pp.973-979
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• 2016

본 연구에서는 렌틸을 이용한 새로운 기능성 소재의 개발에 우선하여 세계적으로 소비량이 비교적 많은 벨루가, 레드, 그린, 프렌치 렌틸을 연구 소재로 선정하고, 0.2% HCl을 함유한 메탄올을 이용하여 추출물을 제조한 후 이들의 항산화 활성을 조사하였다. 총폴리페놀과 플라보노이드 함량은 각각 27.3~30.3 mg TAE/g과 13.14~16.29 mg QUE/g으로 다양하게 나타났으며, 그중 벨루가와 레드 렌틸이 상대적으로 높은 총폴리페놀 함량을 보였다. DPPH와 ABTS 라디칼 소거 활성 및 $H_2O_2$ 소거 활성은 총폴리페놀 함량이 상대적으로 높았던 벨루가와 레드 렌틸이 다른 품종에 비해 유의적으로 높은 활성을 보였으며, 항산화 활성 및 폴리페놀함량과의 비례적 상관관계가 있음을 확인할 수 있었다. ROS 소거 활성이 가장 높았던 벨루가 렌틸을 이용하여 linoleic acid에 대한 과산화 억제 효과를 FTC법으로 조사한 결과, $62.5{\sim}500{\mu}g/mL$에서 농도 의존적으로 유의적인 산화억제효과를 보였으며 $RC_{50}$은 $222.76{\mu}g/mL$로 확인되었다. 또한, 벨루가 및 레드 렌틸 추출물은 산화적 스트레스 발생을 통해 간세포 손상을 유발하는 것으로 알려진 알코올의 세포독성으로부터 우수한 간세포 보호 효과를 나타내었다. 따라서 향후 추가적인 세포실험과 동물실험을 통한 렌틸의 항산화 활성 검정 및 항산화 기전에 관한 연구가 필요할 것으로 생각되며, 이를 비롯한 다양한 생리활성에 대한 연구들이 이루어진다면 기능성 소재로서 렌틸의 산업적 응용이 활발해질 것으로 기대된다.

• 대한교통학회지
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• 제26권6호
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• pp.49-60
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• 2008

본 연구의 목표는 음주운전 증거확보용 음주측정에서 혈액과 호흡의 알코올비율의 분산성을 평가하며 호흡 중 알코올 양의 확인 절차를 합리화하는 데 목적을 두고 있다. 이를 위해 각각 남자 24명, 여자 24명 등 48명의 건강한 피험자를 대상으로 성(2), 주류(2;소주, 위스키), 음식물 유형(2;김치지게, 삼겹살), 알코올 섭취량(2; 몸무게 기준 0.35g/kg, 0.70g/kg) 등의 요인에 대해 직교표에 의한 24 요인 설계를 적용한 실험을 실시하였다. 술은 3회에 걸쳐 나누어 마시게 했으며 0.70g/kg 집단은 45분, 0.35g/kg 집단은 30분에 걸쳐 마시게 했다. 호흡측정과 혈액측정은 음주 종료 후 각기 8회와 5회 실시하였다. 그 결과 혈중알코올과 호흡알코올 측정치 간에는 r = 0.973의 높은 상관이 나타났다. 4원 변량분석 결과, 음식물 유형에 있어서 최대 BrAC의 차이(F (1, 43) =5.1, p<.029)가 드러났지만 술의 종류와 성별에 있어서는 차이가 없었다. 전체적인 혈액호흡비(BBR)는 2295${\pm}$403이었고, 95% 신뢰구간은 1489와 3101이었다. 이런 변산에도 불구하고, 호흡측정기에 2100;1의 분배비율을 적용하는 것은 합리적인 것으로 보인다. 그것은 본 연구에서 나타난 바와 같이 적어도 음주 후 30분이 지나면 대부분의 피험자가 2100:1 이상의 비율을 보이기 때문이다.

• 한국응급구조학회지
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• 제13권2호
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• pp.73-86
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• 2009

Purpose : This study is a descriptive correlation study to offer the basic materials for developing the preventive program of continuously increasing AIDS in the young people by examining the knowledge and attitude of AIDS in college students. Methods : The period of data collection was from May 1 to 15, 2009, 300 freshman, sophomore and junior students who understood the purpose of the research and agreed to participate in the questionnaire were randomly sampled, structured questionnaire was distributed to them and their responses were collected. Instruments used for this study included those used by Kim and Lee and revised and complemented by this researcher to measure the knowledge of AIDS and those by Yun and Lee revised and complemented by the researcher to measure the attitude of AIDS. For data analysis, it measured technical statistics, t-test, ANOVA, and Pearson's correlation coefficient using SPSS/PC 12.0. Results : The results of this study are summarized as follows. 1. The whole knowledge of AIDS the subjects had scored 58.9 and their average attitude scored $3.78(1{\pm}25)$. 2. In the degree of knowledge of AIDS depending on general characteristics and health-related characteristics of the subjects, it was found that the students at the department of emergency medical showed higher knowledge(t=3.638, p=.001) and positive attitude of AIDS(t=3.330, p=.001) compared to students at other majors. 3. In the degree of knowledge of AIDS depending on AIDS-related education, subjects who had experienced AIDS education(t=1.973, p=.050), those with the experience of theory education(F=4.057, p=.008), those who felt the necessity of AIDS education(t=4.588, p=.000), and those who were willing to take part in AIDS education(t=2.898, p=.004) showed higher know1edge of AIDS. In the attitude of AIDS, subjects with theory-oriented AIDS education(F=3.012, p=.032), those who felt the necessity of AIDS education(t=2.445, p=.015), and those who were willing to take part in AIDS education(t=2.379, p=.018) showed positive attitude of AIDS education. 4. As the knowledge of AIDS the subjects was higher(r=.329, p=.000), they showed more positive attitude of AIDS and it meant that there was positive correlations. Conclusion : Consequently, systematic, concrete and continuous education of AIDS suitable to the requirements of college students is needed to induce changes of their knowledge and attitude of AIDS and for this, AIDS education program which can be used properly by the developmental stages of college students who belong to late adolescence should be developed in the field of school and if possible, curriculum of sex education including AIDS education should be established in all departments of college.