• Journal of Nutrition and Health
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• v.55 no.5
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• pp.523-532
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• 2022

Vitamin C is an important physiological antioxidant which neutralizes reactive oxygen species (ROS) and reduces the oxidative stress in the body. Although it has been associated with various diseases, few studies have reported the dose-response relationship between vitamin C intake, storage and functions in the body, including its antioxidant function. The criteria to establish the Dietary Reference Intakes for Koreans (KDRIs) for vitamin C were based on the changes in plasma concentrations and saturation of leukocytes according to intake levels and the effects on antioxidant capacity and risk of metabolic diseases. When establishing the 2020 vitamin C KDRI, while there was no change in the criteria from those of 2015, the reference values were recalculated and revised to reflect changes such as the new standard weight by age. As the number of people consuming dietary supplements has increased over the last decade, only about 10% of adults consume less than the average total vitamin C, but the proportion of adolescents and elderly who consume less than the average is high. On the other hand, as the intake of vitamin C supplements increases, the proportion of people consuming excessive vitamin C is also increasing. There is a body of opinion that it is necessary to establish a vitamin C KDRI for smokers or people with chronic diseases such as the metabolic syndrome, but these standards have not been established due to the lack of supporting scientific evidence. As a result, studies to establish vitamin C KDRI for Korean smokers and patients with the metabolic syndrome, as well as studies on the excessive intake of vitamin C due to supplementation and interactions with other nutrients, are needed.

• Land and Housing Review
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• v.6 no.4
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• pp.239-239
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• 2015

최근 국내 주택시장에서의 관심은 수요와 공급의 불일치 해소이다. 이를 위해서는 정확한 수요권역 설정에 의한 사업지구별 수요예측이 필수적이다. 본 연구에서는 주택시장권역 설정 시 선행연구에서 사용하는 가구이동자료 기준의 수요권역과 청약자 주소지에 의한 실제 수요권역의 차이를 비교분석 하였다. 수도권 3개 택지개발지구를 대상으로 한 실증분석 결과, 청약자료에 의한 실제 수요권역은 가구이동자료 기준의 수요권역에 비해 확대되는 것으로 나타나 기존의 가구이동자료 기준에 의한 수요권역 설정의 보완이 필요한 것으로 판단된다. 특히 사업지구와 서울 도심과의 거리, 핵심 수요권과 배후수요권의 수요구성비와 같은 입지경쟁력, 개발규모(신도시급 여부) 등의 변수가 정확한 수요권역의 설정을 위해 우선적으로 보완되어야 할 변수로 나타났다. 또한 동일 사업지구에 있어서도 임대/분양과 같은 주택유형, 주택의 규모에 따라 수요권역의 차이를 보였다. 아울러 부동산경기 역시 수요권역의 범위형성에 영향을 미치고 있으며 정확한 수요권역 분석을 위해서는 주택가격, 사업지구 입지경쟁력 등이 함께 복합적으로 고려되어야 할 필요성이 확인되었다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.01a
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• pp.123-126
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• 2023

본 논문에서는 철도 인근 주거지역, 철도 건널목, 철도 터널, 철도 교량을 위험 상황으로 설정하고, 각 상황이 철도가 아닌 다른 상황에서 발생할 때와 철도에서 발생할 때와의 위험도 차이를 분석하며 철도 위험 상황에 영향을 미치는 요인들을 분석한다. 또한, 요인별 위험도의 기준을 설정하고 설정한 위험 상황과 유사한 상황에 대한 데이터 발생 시 해당 데이터를 웹 어플리케이션에 송출하여 소비자들에게 서비스를 제공한다.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.28 no.3
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• pp.301-308
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• 1995

To establish the quality criteria of low-salt fermented seafoods in terms of consumer acceptability, sensory assessment and physicochemical analysis were undertaken using commercial products. In case of low-salt fermented Alaska pollack (Theragra chalcogramma) roe, Brix over $47.6\%$ for unseasoned products and $41.2\%$ for seasoned ones were considered as acceptable products. In spite of some variations between manufacturers, increase in whiteness was observed as consumer acceptability was decreased. In contrast, whiteness was not suitable criteria for low-salt fermented squid (Sepiella maindroni). Brix can be used as good criteria as long as its relationship was established to acceptability of different products; pH also showed the same tendency as Brix. In case of low-salt fermented Alaska pollack tripe, Brix was likely to be the best criteria; whiteness, in addition, could be used as quality criteria.

• Land and Housing Review
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• v.2 no.3
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• pp.269-276
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• 2011

Recently, the chance of dew condensation in apartment buildings is increasing because of several reasons. For example, ventilation rate has been decreased because of high-insulations and airtightness for saving energy. Besides, the humidity has been made by drying washes, cooking and bathing inside of apartment buildings. However, there is lack of resonable design criteria for preventing condensation in real life and real surroundings. Therefore, this study is aimed at making a resonable design criteria of preventing condensation by measuring the indoor temperature and humidity in real life. In addition to this, it is aimed at making a resonable outdoor condition and classifying regions by using weather data. The following are the results. The interior criterion for condensation was set up $25^{\circ}C$ and a relative humidity of 55%. The outdoor criterion for condensation was set up $20^{\circ}C$, $-15^{\circ}C$, and $10^{\circ}C$ respectively for the hard frost, middle, and southern areas.

• Journal of Food Hygiene and Safety
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• v.25 no.1
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• pp.16-23
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• 2010

Although concerns about Arsenic (As) contamination in agricultural foods have currently increased, there in on adequate international risk management standards for As particularly on agricultural commodities and processed agricultural products. This scenario holds true also in Korea. Australia, and New Zealand has determined the As maximum level (ML) but only on cereals grains which is based on total As contents. ln addition, Japan has regulated the ML based on trivalent As contents in agricultural commodities, which do not have legal restrictions. On the other hand, China has developed a systemic risk management to restrict the As contamination above MLs in agricultural commodities and processed agricultural products based on inorganic and total As contents. The establishment of an adequate analytical method for As specification in agricultural foods is essential to determine the acceptable level of As in agricultural food. Probabilistic approach may remove some uncertainties in calculating human risk assessment from As. It should be reviewed in terms of maximum levels to set the best scenario based on a realiability and availability to achieve effective As management on agricultural foods in Korea.

• Fire Science and Engineering
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• v.32 no.5
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• pp.22-33
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• 2018

The amount of halogen clean fire extinguishing agents has been increased by the excellent features of extinguishing, adaptability and no residue. On the other hand in situations without a hazard assessment and safety standard of agents, chemical accidents by the agents occurs frequently. This study was performed to propose the halogen clean agents' regulatory exposure limit and safety standard including the quantitative ventilation system with gas leak monitoring, hazard recognition and optimal personal protection selection through a literature review and experimental research.

• Journal of KSNVE
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• v.2 no.1
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• pp.15-20
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• 1992

(1) 화약발파작업을 시작하기 전에는 필히 시험발파, 안전진단을 통해 공해 및 안전사고 발생요소들을 면밀히 분석하고 파악하여 발파공법, 천공공법, 사용폭약 의 종류, 사용약량 등을 결정하고 이에 따른 적합한 안전거리의 설정, 안전덮게, 안전망의 사용, 필요시 휀스철망 설치등의 안전조치를 완벽히 취해야겠다. 또한 현행 소음진동규제법에 의하면 폭약 사용시 7일전 신고의무 규정을 우리나라의 공사 현실을 감안해 볼 재검토 할 필요가 있다. (2) 선진국의 발파진동 기준을 우리나라 의 경우와 비교 분석해 볼때 우리나라의 경우 발파진동 안전기준은 도심지에는 대체 로 0.5cm/sec가 적당하고 고주택, 아파트 등이 밀집된 지역이나 건물지반이 특히 약한 곳은 0.2cm/sec을 적용함이 타당하다고 판단된다. 또한 도심지에서의 안전발파 를 위한 터널공법으로는 주변 생활환경 소음진동방지를 위한 심발법으로 브이 컷법 을, 여굴방지와 미려시공 등 공사시 안전사고, 소음진동을 방지하기 위한 공법으로는 슬러리, 파이 넥스 폭약을 이용한 정밀면 발파법을 권장한다. (3) 연화발사시 안전 거리를 3.deg. 기준 최소반경 129m, 12" 기준 최고 반경 200m로 설정하여야 겠다. 또한 연화발사시 발생하는 폭발 소음은 80 - 100dB 정도로써 대량으로 장시간 발사 시는 청력장해 등의 피해가 발생할 수 있으나 우리나라의 경우는 발사 총 시간이 대체로 30분을 초과하지 않으므로 관람자나 일반인들이 소음피해를 호소할 수준은 아니라고 결론지을 수 있다.수 있다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.26 no.6
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• pp.581-588
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• 2015

In this paper, we researched that setting standard for RSC(Radar Cross Section) of naval surface ship could be determined and considered in various ways on ship's survivability, technical building feasibility, operation and so on. This study presented fundamental capacity on anti-ship missile, radar, flight and so no and the procedure to set of target/standards for RSC. The RCS standards is good at setting low as low as to improve survivability aspect, but because we should consider effect, technical limit, cost etc, this paper analyzed necessary elements to set standard than to suggest specific number and suggested procedure to set standars according to suggest the boundary of RCS.

• Korean Journal of Ecology and Environment
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• v.39 no.3 s.117
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• pp.285-295
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• 2006

Korean water quality standards for the protection of agricultural water uses were originally derived based on management of public water resource. They were not prepared to protect crop plants from contaminants, and therefore required water parameters in agricultural uses were excluded in current water quality standards. Korean water standards in river and lake have five levels, and level IV is correspondent to agricultural water uses. Currently, there is no Korean guidelines to protect crop plants from contaminants contained in agricultural water. In Canada, agricultural water guidelines are provided to protect crops from contaminants. In this study, agricultural water quality standards in Korea were compared with them in developed countries to evaluate the adequacy of Korean water quality standards for the protection of agricultural water uses. Additional water quality parameters in agricultural uses were also proposed. Suggested parameters include electric conductivity, sodium, chloride, boron, copper, iron, zinc, and microbiological quality, They are the required parameters to protect crop plants as well as human health. Current water quality standards in agricultural uses was not considered to be appropriate in terms of crop protection. Additional water parameters should be included in agricultural water quality standards.