• Proceedings of the Korea Technology Innovation Society Conference
• /
• 2017.05a
• /
• pp.221-240
• /
• 2017

이 연구의 목적은 비 해양분야 바이오기업의 해양 분야 진출을 유도하기 위해 필요한 지원 조건들을 기업수요 관점에서 확인하고, 이를 기초로 향후 해양바이오 산업 육성에 필요한 기업저변 확대를 위한 정책지원 방안을 도출하는 데 있다. 이 연구에서는 전국의 200개 바이오기업을 대상으로 실시한 조사 결과를 활용한 통계분석을 통해 해양 분야와 비 해양 분야 바이오기업의 기업운영 현황을 비교분석하였으며, SNA(Social Network Analysis)를 이용해 비 해양 분야 바이오기업이 해양 분야로 진출하기 위해 필요로 하는 기업니즈를 분석하였다. 이 연구의 분석결과를 요약하면 다음과 같다. 첫째, 바이오 기업의 23.5%는 해양바이오 소재 활용을 병행한 기업 생산 활동을 하고 있다. 둘째, 최근 해양바이오 소재의 유용성이 확인됨에 따라 비 해양바이오 분야 기업의 58.8%는 해양바이오 분야에 대한 진출의향을 갖고 있는 것으로 분석되었다. 셋째, 비 해양분야 바이오 기업들이 해양 분야로 진출하기 위해 가장 필요로 하는 것은 기술지원과 정보공유, 산업소재의 확보 인 것으로 조사되었다. 이 연구에서는 분석 결과를 기초로 하여 향후 바이오 기업의 해양 분야 진출을 지원하기 위해 필요한 전략을 제시하였다.

• Journal of Radiation Protection and Research
• /
• v.32 no.4
• /
• pp.178-183
• /
• 2007

Neutrons are high LET (linear energy transfer) radiation and cause more damage to the target cells than x-rays or gamma rays. The damage from neutrons is generally considered fatal to a cell and neutrons have a greater tendency to cause cell death through direct interaction on DNA. We performed experiments to measure growth delay ratio and oxygen enhancement ratio (OER) in mouse model system. We inoculated EMT-6 cells to the right hind leg of BALB-c mouse and X-rays and neutron beams were given when the average volume of tumors reached $200-300mm^3$. We irradiated 0, 11, 15.4 Gy of X-ray and 0, 5, 7 Gy of fast neutron beam at normoxic and hypoxic condition. The volume of tumors was measured 3 times per week. In x-ray experiment, growth delay ratio was 1.34 with 11 Gy and 1.33 with 15.4 Gy in normoxic condition compared to in hypoxic condition, respectively. In neutron experiment, growth delay ratio was 0.94 with 5 Gy and 0.98 with 7 Gy, respectively. The OER of neutron beam was 0.97. The neutron beam was more effective than X-ray in the control of hypoxic tumors.

• The Korean Journal of Zoology
• /
• v.10 no.1
• /
• pp.27-34
• /
• 1967

SM 계 자성 마우스를 대조군과 실험군으로 나누어,대조군에는 0.9% 생리식염수를 , 실험군에는 methylene blue(110 mg/kg, 식염수에 용해, pH 7.0)를 각각 피하주사하고, 40 분, 6 시간 또는 24시간후에 양군을 다같이 120 r X-선으로 일시 전신조사하였다. 조사후 21 시간에 걸쳐 albumin-globulin 비, 전혈청단백질 , 그리고 체중에 대한 간 및 신장중량비를 측정하여 조사전 처리시핵에 따른 methylene blue 의 방어효과를 조사하였다. 일반적으로 양군에서 조사후 일구간에 따라 2개의 변화가 나타났으며, 첫째는 1 일구에 , 둘째 상은 8 일구에 나타났다. methylene blue 처리는 이 두 개 상 일구에서 albumin -globulin 비의 증가성, 전혈청단백질 및 간장중량의 감소성에 대하여 큰 지체성을 나타냈다. 조사전 40 분 처리군에서 특히 현저한 방어작용이 있었으나 6 시간 및 24 시간전 처리구에서는 별 영향이 없었다.

• Survey Research
• /
• v.4 no.2
• /
• pp.47-62
• /
• 2003

Based upon the Labor Demand Survey and the Survey on Wage Structure being conducted annually by the Ministry of Labor, we suggest a convenient statistical tool which can analyze and appraise the effect of introducing a new survey method. Since both surveys have in common very similar sampling frames and sampling schemes in structure, one can measure the variability of one survey on the basis of the other. The influence appraisal method adopted here is applied to ratio data between two independent estimates belonging to the identical category by year and has a statistical form of comparing ratio data before introducing a new survey with those after introducing a new survey.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.34 no.9
• /
• pp.1459-1463
• /
• 2005

Not enough data on nutritional change of foods by gamma irradiation are accumulated. It is known that amounts and digestibility of macronutrients such as carbohydrates, proteins and lipids are not significantly altered by irradiation treatment. However, among micronutrients, vitamins are known to be susceptible to irradiation. This study was conducted to investigate the change of contents of riboflavin in egg powder and niacin in chicken breast. By irradiation of 5 and 10 kGy, riboflavin contents of egg powder were respectively reduced to $80.18\%\;and\;84.80\%$ of non-irradiated sample, and niacin contents in chicken breast were reduced to $85.30\%\;and\;92.60\%$, respectively. These results suggest that the reduction rate by gamma irradiation seems to be lower in niacin content than in riboflavin, and the losses of riboflavin and niacin occur within the range of $20\%$ by irradiation of up to 10 kGy.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.14 no.3
• /
• pp.1359-1366
• /
• 2013

The purpose of this study was to examine the blood pressure, serum lipid levels and obesity indices according to smoking status, and the effects of smoking cessation on blood pressure, serum lipid and obesity indices. The 2,230 male workers aged 30-59 years were observed the age, smoking status, SBP, DBP, TC, TG, HDL-C, LDL-C, AI, BMI, body fat rate and waist circumference, from April to July, 2011. As a results, the mean score of SBP, DBP, TC, TG and BMI were significantly higher in smoking group than non-smoking group, but HDL-C were significantly lower in smoking group than non-smoking group, the distribution of hypertension was significantly higher in smoking group than non-smoking group. The abnormal levels of TC, TG and HDL-C were significantly higher in smoking group than non-smoking group, and the distribution of obesity was significantly higher in smoking group than non-smoking group. Age adjusted odds ratio(ORs) was significantly increase in smoking group than non-smoking group: hypertension(3.59 times), hypercholesteremia (1.49 times), hyperlipidemia(1.81 times), low HDL-cholesteremia(1.58 times), high level of atherogenic index(1.27 times). Above results suggested that the smoking related with blood pressure and serum lipid levels.

• Proceedings of the Korea Society of Costume Conference
• /
• 2004.05a
• /
• pp.42-42
• /
• 2004

본 연구는 의복의 시각적 이미지 평가의 차원을 조사하고, 지각자의 내향성-외향성 성격특성과 의복비, 의복스타일에 따른 이미지평가의 차이를 조사하며, 성격특성과 의복비에 따른 의복스타일 선호도의 차이를 조사하는데 그 목적이 있었다. (중략)

• Survey Research
• /
• v.9 no.1
• /
• pp.1-22
• /
• 2008

Telephone directories ille still being used as the sampling frame in almost all fixed-line telephone surveys in Korea, causing potentially serious coverage error. RDD (random digit dialing) sampling is an obvious alternative to solve the problem. The aim of this paper is twofold: 1) proposal of RDD methodology suitable to the telephone system of Korea and 2) the identification of socio-demographic and socio-psychological differences between listed-number and unlisted-number respondents. Major findings of RDD telephone survey conducted experimental]y are as follows. 1) Population coverage by telephone directories is 60% or less. 2) Unlisted-number households have statistically larger income compared to listed-number households. 3) Unlisted-number households have smaller family size compared to listed-number households. 4) Unlisted-number respondents are more sensitive about confidentiality, leaks, 5) Unlisted-number respondents are more liberal compared to unlisted-number respondents. These facts suggest that directory-based telephone surveys tend to be biased in socio-economic aspects.

• Korean journal of food and cookery science
• /
• v.18 no.1
• /
• pp.30-33
• /
• 2002

The quality of an angel food cake prepared with albumen of irradiated eggs was investigated. Fresh shell eggs were irradiated at various doses up to 3 kGy. Egg white from irradiated eggs decreased the specific gravity and increased the pH of cake batter. The specific volume and expansion ratio of the cake increased by the use of albumen from irradiated eggs. Egg white from irradiated eggs made the crust color of cake darker, more reddish and yellowish. The textural characteristics of the cake were also affected by irradiation. Irradiation caused a decrease in hardness, gumminess and brittleness and an increase in cohesiveness and springiness. Overall, egg white from irradiated eggs apeared to make an angel food cake softer than that of non-irradiated egg white.

• The Journal of The Korea Institute of Intelligent Transport Systems
• /
• v.16 no.4
• /
• pp.107-121
• /
• 2017

This study conducted a 3-stage survey and simulation experiment to identify the impact of vehicle platoons on car-following behavior of manually-driven vehicles. Vehicle maneuvering data obtained from driving simulations was statistically analyzed based on three measures including average speed, acceleration noise, and offset to represent the deviation of lateral movements. Results indicate that MV drivers tended to have psychological burden while driving in automated vehicle platooning environments, which resulted in different vehicle maneuvers. It is expected that the outcome of this study would be useful fundamentals in developing various traffic operations strategies for managing mixed traffic stream consisting of MVs and autonomous vehicles.