• 한국식품영양과학회지
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• 제43권2호
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• pp.179-186
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• 2014

대사체학이 질병, 약물, 스트레스, 식이, 생활습관, 유전적 차이, 장내 미생물 등에 의해서 발생하는 비정상적인 대사 메커니즘을 규명하고 관련 바이오 마커 발굴에 중요한 역할이 증명됨에 따라, 식품 영양학과 대사체학이 융합된 영양 대사체학의 역할이 더욱 중요해지고 있다. 특히 잘못된 식생활에 따른 미래의 질병 예측이 가능해지고 있어 향후 적절한 질병 예방이나 치료를 위한 적절한 식생활이나 식이에 대한 정보를 제공함으로써 건강 증진은 물론 개인별 맞춤식이나 맞춤약물 처방을 통한 개인 맞춤형 건강관리(personalized health care) 시대가 멀지 않았다. 또한 복잡한 식생활 패턴, 대사 반응에 대한 개인 간 차이 그리고 방대한 대사체 데이터와의 관계들을 효과적으로 밝혀낼 수 있는 기술에 대한 지속적인 개발과 영양 대사체학(nutritional metabolomics)이 유전체학(genomics or transcriptomics)과 단백체학(proteomics) 기술과 융합적으로 연구가 이루어질 때 질병과 식사 섭취 사이의 관계가 더욱 투명하게 규명될 것이다.

• 한국산업보건학회지
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• 제9권2호
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• pp.158-166
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• 1999

The purpose of this study was to investigate the correlation between airborne total dust and man-made mineral fibers (MMMF), and to estimate total dust concentration to maintain below the American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV$^{(R)}$) for the MMMF. The regression coefficients between airborne total dust concentrations and fiber concentrations determined in the industries producing glass fibers, rock wool. refractory ceramic and continuous filament glass fibers products were 0.41, 0.42, 0.20 and 0.19, respectively. The size characteristics of fibers as well as the amounts of contaminated non-fibrous dusts could affect the correlation intensities. When total dust and fiber exposure data were compared with the occupational exposure limits, there was a large gap between two evaluation results. The regression coefficient between total dust and fiber data was increased ($r^2=0.88$) in the process of insulation installation generating in the higher levels of glass or rock wool fibers. In this case, an estimated total dust concentration of glass wool or rock wool fibers complying with the ACGIH TLV (1 f/cc) was $1.7mg/m^3$. In conclusion, the total dust and fibers concentrations was highly correlated at the higher exposure levels so that total dust-monitoring data could be used to control simply and economically and to estimate worker's exposure to fibers.

• 생태와환경
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• 제44권4호
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• pp.364-372
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• 2011

The pale chub (Zacco platypus) is generally found in Asian countries, such as Korea, Japan, and China. Nevertheless, very little information exists about the genes involved in the metabolism of xenobiotics in this species. This species is useful in monitoring the environmental impact on various pollutants in freshwater as a sentinel fish species. We cloned the full-length cDNA sequence of xenobiotic metabolizing cytochrome P450 1A (CYP1A) gene from Z. platypus and characterized it. Tissue distribution and timedependent induction of CYP1A were studied by real-time RT-PCR. Induction pattern of CYP1A was studied by exposing the fish to an arylhydrocarbon receptor agonist, ${\beta}$-naphthoflavone (BNF). The liver showed the highest level of expression in basal state as well as BNF- treated fish. However, appreciable levels of expression were also recorded in Gill and kidney and the least level of expression was observed in the eye. The results of the time-course study revealed an induction in the liver, brain, and gills after 6 h and 12 h in most of the tissues. This study provides an insight into the xenobiotics metabolizing system of Z. platypus and offers baseline information for further research related to biomarker, stress, and adaptive response of this ecologically important fish species in the freshwater environment.

• Journal of Preventive Medicine and Public Health
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• 제41권3호
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• pp.186-194
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• 2008

Objectives : This study describes trends in the socioeconomic disparities in breast cancer screening among US women aged 40 or over, from 2000 to 2005. We assessed 1) the disparities in each socioeconomic dimension; 2) the changes in screening mammography rates over time according to income, education, and race; and 3) the sizes and trends of the disparities over time. Methods : Using data from the Behavioral Risk Factor Surveillance System (BRFSS) from 2000 to 2005, we calculated the age-adjusted screening rate according to relative household income, education level, health insurance, and race. Odds ratios and the relative inequality index (RII) were also calculated, controlling for age. Results : Women in their 40s and those with lower relative incomes were less likely to undergo screening mammography. The disparity based on relative income was greater than that based on education or race (the RII among low-income women across the survey years was 3.00 to 3.48). The overall participation rate and absolute differences among socioeconomic groups changed little or decreased slightly across the survey years. However, the degree of each socioeconomic disparity and the relative inequality among socioeconomic positions remained quite consistent. Conclusions : These findings suggest that the trend of the disparity in breast cancer screening varied by socioeconomic dimension. Continued differences in breast cancer screening rates related to income level should be considered in future efforts to decrease the disparities in breast cancer among socioeconomic groups. More focused interventions, as well as the monitoring of trends in cancer screening participation by income and education, are needed in different social settings.

• 대한토목학회논문집
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• 제40권2호
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• pp.233-238
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• 2020

구조물 건전도 모니터링 시스템을 기반하는 교량 딥러닝 손상 추정 기법들은 대부분 지도학습을 기반으로 하고 있다. 지도학습의 특성상 손상 위치 추정 딥러닝 모델의 학습을 위해 교량의 손상 위치를 나타내는 라벨(Label) 데이터와 이에 따른 교량의 거동 데이터가 필요하다. 하지만 실제 현장에서 손상 위치 라벨 데이터를 정확히 얻어내는 것은 매우 어려운 일이므로, 지도학습 기반 딥러닝은 현장 적용성이 떨어진다는 한계가 있다. 반면에, 비지도학습 기반 딥러닝은 이러한 라벨 데이터 없이도 학습이 가능하다는 장점이 있다. 이러한 점에 착안하여 본 연구에서는 비지도 학습의 대표적인 딥러닝 기법인 Variational Autoencoder를 활용한 교량 손상 위치 추정의 방법을 제안하고 검증하였으며, 그 결과, 교량 손상 위치 추정을 위한 VAE의 적용 가능성을 보였다.

• 한국학교보건학회지
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• 제10권2호
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• pp.193-211
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• 1997

The study was designed to gain necessary basic data in order to grasp the health knowledge, attitude, and practice level of students and teachers of elementary, middle and high schools. This study was conducted through interviews of 3,400 students and 1,022 teachers attending 14 different schools large, middle and small cities and rural towns during a period of nine months (from Oct. 2 1995 to Jun. 30 1996). By the results of this study, the recommendations can be summarized as follows: 1. A school health development committee should be established of 10 members: school health related teachers (physical trainers, nurses, and teachers in charge of health), parents, persons related to health administration, local medical doctors, and student reprensentatives in order to support and immplement school health development plans. 2. Like advanced countries, a health class of 2~4 hours should beplaced in middle and high schools. A nurse majoring in health from a university should be the teacher. 3. A curriculum of health should contain the following: education on health, sex, alcohol, tabacco, the misuse of the drugs, the structure and function of human body, the growth of the body, mental health, safety and emergency care, the prevention of disease, proper eating habits and nutrition, daily health life, family health education, society health, community health, environmental pollution and individual responsibility. 4. Create a school health promotion center, with a nurse's office, and a sports center which has health machines (bars, aerobics, training, twist machine, belt massage, running machine, bench press, chest waist, hack hip extension machine) as well as a physical strength measuring machine (muscular strength, alertness, flexibility, endurance, lung functions and so on), so that the teaching staff and students can use them and train their bodies. 5. Through a refresher education program, urge teachers to understand school health promotion services. 6. Regulate a standard and establish a system of monitoring the physical enviroment of the school (the height of desks and chairs, illumination facilities, ventilation facilities, safe drinking water). 7. Create a check list of health to evaluate improvement.

• 해양환경안전학회지
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• 제18권1호
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• pp.15-24
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• 2012

동해연안의 수질특성 및 상태를 파악하기 위하여 2004년부터 2010년까지의 국가해양환경측정망 조사결과를 이용하여 수질인자의 거동을 분석하였다. 본 연구에서는 통계적 방법을 이용한 수질인자간의 상관관계 및 주성분 분석을 통하여 해역별 수질환경 특성을 파악하였으며, OECD의 부영양화 기준과 부영양도, 그리고 유기오염도 지수의 산정으로 해역별 오염상태를 평가하였다. 수질인자간의 주성분 분석에서 동해연안은 클로로필 a와 염분이 주요인자로 설명되는 2개의 요인으로 구분되었다. 해역별로는 죽변을 경계로 남부와 중부로 분류되었으며, 동해 중부 해역에서는 죽변, 그리고 남부해역에서는 감포연안이 별도로 분류되었다. 동해연안의 영양상태는 Oligotrophic~Mesotrophic 수준으로 구분되었으며, 부영양화도는 1 이하로 평가되었다. 유기오염지수는 동해연안 전 해역에서 양호한 수질상태로서 평가되었다.

• 동굴
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• 제90호
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• pp.35-56
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• 2009

본 연구의 목적은 동굴환경의 황폐화에 대한 지속가능한 동굴의 연구, 관광 및 보존을 위하여 첨단정보화 기술인 유비쿼터스 정보기술을 활용한 새로운 차원의 동굴시스템을 제시하는데 있다. 이러한 환경문제를 극복할 수 있는 방안으로 첫째, 동굴에 대한 법제도나 조례 등으로 강력한 관리방안이 제시되거나 휴식년제 도입 등으로 행정적인 방안이 있으며, 둘째, 최첨단 정보기술을 적용하여 효율적이고 지속가능한 동굴의 관리로 지하동굴 자원의 청정환경을 도모하는 방법이 있다. 유비쿼터스 동굴의 구축에는 첨단 자동정보시스템 인 감지시스템(USN), 모니터링시스템(RFID/UFID), 무선통신시스템(WiBro/WiFi), 공간정보시스템(GIS), 항공레이저시스템(LiDAR), 저열 조명시스템(ELD) 및 통합관리시스템 등이 적용되었다. 이러한 유비쿼터스 동굴 구현에 필요한 첨단화 정보기술분야의 산업적인 융합에 의한 차세대 동굴살리기 명품솔류션 구현을 통하여 공간정보기반의 유비쿼터스 동굴관리시스템의 모델을 제시하였다. 따라서 u-cave모델은 정책의 적용에 따라 동굴의 자연관리, 생태관리, 시설관리, 관광관리, 문화관리 및 소득창출 등의 시너지 효과를 달성할 수 있는 것으로서 동굴의 자연환경보존 기반의 수단으로서 기여 될 수 있다.

• 한국전자통신학회논문지
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• 제10권12호
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• pp.1329-1336
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• 2015

저전력 CMOS 카메라 기술의 발전으로 농업용 모니터링, 자연환경 감시 등의 다양한 비디오 센서네트워크 응용들에 대한 연구가 활발히 진행되고 있다. 이러한 응용들에서 핵심 기술은 영상을 어떻게 압축하고 전송할 것인가에 대한 것이다. 일반 센서 데이터에 비해 영상 데이터는 양이 크기 때문에 특히 트래픽에 대한 정확한 예측이 이루어져야만 광범위한 네트워크 자원을 효과적으로 관리할 수 있다. 본 논문에서는 비디오 센서 네트워크 환경에서 비디오 트래픽을 정확하게 예측하는 방법을 제안한다. 제안하는 방법은 영상의 복잡도를 측정하고 이 값을 적응적으로 트래픽 예측에 적용함으로써 기존의 방법들 보다 정확하게 압축 영상의 트래픽 양을 예측할 수 있다. 실험결과는 적응적 복잡도 예측을 이용한 제안하는 방법이 기존 방법에 비해 12% 이상 정확하게 결과 비트량을 예측하는 것을 보여준다.

• Journal of Forest and Environmental Science
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• 제33권4호
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• pp.348-354
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• 2017

Agroforestry has been practiced in arid and semi-arid regions for the purposes of preventing desertification and to increase income for locals. However, the intended effects of such practices have been limited due to strong winds and aridity. This study undertook multi-year monitoring of the productivity of income crops associated with windbreak planting in a semi-arid region of Mongolia, and explored strategies of windbreak planning to enhance the multi-purpose effects of agroforestry practices. The tree crown density of windbreak planting was on average 40% in one year after planting and 65% 2-3 years after, and thereby windspeeds were reduced by about 30% and 54%, respectively. Average windspeed reductions at leeward distances from the windbreak planting were approximately 60% within 3H (H=tree height), 50% at 5H, and 42% at 7-9H, presenting a pattern in which the farther the distance the less the reduction in windspeeds. The windbreak planting increased crop productivity by up to 6.8 times, compared to the productivity absent of windbreaks. Increases in the crown density as stated above resulted in increases of crop productivity by up to 3.6 times. Based on such results, this study proposed a model of windbreak planning as a typical land-use system of border windbreak planting or alternate windbreak planting of combining trees and income crops. The model also included tree planting with a crown density of 60% and allocation of income crops within a leeward distance of 5 times the height of the trees to reduce windspeeds by about 50%. The results from this study are applicable to practicing agroforestry not only at the study site but also in other regions worldwide where strong winds and aridity are problematic.