• 응용통계연구
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• 제33권5호
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• pp.627-637
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• 2020

본 논문에서는 건강보험심사평가원에서 제공한 약 120만명의 2014년 고령환자의료자료(HIRA-APS-2014-0053)과 기상자료를 일반화추정방정식(generalized estimating equation; GEE) 모형과 long short term memory (LSTM) 기반 순환신경망(recurrent neural network; RNN) 모형으로 분석하여 기상 조건에 따른 주요 주상병의 발생 빈도를 예측한다. 이를 위해 환자가 의료 서비스를 받은 기관의 지역을 이용하여 환자의 거주지를 추정하고 해당 지역의 주별 기상 관측소 자료와 의료자료를 병합하였다. 질병 발생 상태를 세 개의 범주(질병에 걸리지 않음, 관심 주상병 발생, 다른 질병 방생)로 나누었으며 각 범주에 속할 확률을 GEE 모형과 RNN 모형으로 추정하였다. 각 범주별 발생 건수는 해당 범주의 속할 추정확률의 합으로 계산하였으며 비교분석결과 RNN을 이용한 예측이 GEE를 이용한 예측보다 정확도가 높은 것으로 나타났다.

• 한국식품영양학회지
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• 제30권6호
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• pp.1299-1309
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• 2017

The aim of this study was to investigate status of safety accidents of school foodservice cooks in Daegu and to analyze the factors affecting the occurrence of the accidents in order to seek effective ways for preventing safety accidents in school foodservice. The survey showed that the most frequent safety accidents were 'bruises', followed by 'burns', 'contact with harmful substances such as disinfectants', 'fall-off ' and 'sprains'. The mental fatigue perception of the respondents was generally lower than the physical fatigue perception. The means of the perception levels of work intensity, cooking environment of the foodservice place, and safety-related behaviors, and consciousness were 3.15, 2.99, and 4.06 out of 5 points, respectively. In addition, the annual average of the number of participating in the accident prevention training per person was 17.34 times, that is, the respondents received the training at least once a month on average. A multiple regression analysis was conducted to investigate the variables affecting the occurrence of safety accidents that happened to foodservice cooks. It revealed that the work intensity perception and the cooking environment perception influenced the frequency of safety accidents.

• Asian Pacific Journal of Cancer Prevention
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• 제15권8호
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• pp.3763-3766
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• 2014

Human mammary epithelial cells have different proliferative statuses and demonstrate a close relationship with age and cell proliferation. Research on this topic could help understand the occurrence, progression and prognosis of breast cancer. In this article, using significance analysis of a microarray algorithm, we analyzed gene expression profiles of human mammary epithelial cells of different proliferative statuses and different age groups. The results showed there were significant differences in gene expression in the same proliferation status between elderly and young groups. Three common differentially expressed genes were found to dynamically change with the proliferation status and to be closely related to tumorigenesis. We also found elderly group had less status-related differential genes from actively proliferating status to intermediate status and more statusrelated differential genes from intermediate status than the young group. Finally, functional enrichment analyses allowed evaluation of the detailed roles of these differentially-expressed genes in tumor progression.

• 대한안전경영과학회지
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• 제23권2호
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• pp.19-24
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• 2021

The petroleum refinery industry handles a variety of complex chemical substances and employs a large number of people around the world. According to previous research, diseases caused by exposure to chemicals were quite common among workers in refineries until the 1980s. More recently, it is unusual for oil refinery workers to suffer from these serious diseases. The objective of this study was to identify the occurrence level of general diseases and any differences in lifestyle habits of workers in refineries in Korea compared with the general population. In this study, we used the results of health examinations from 2014 for workers at a large oil refinery in South Korea. In addition, based on the results of KNHANES from 2014 as representative of the population, hypertension, diabetes, anemia, hyperlipidemia, liver function abnormality, and kidney function abnormality were calculated using the standardized incidence rate. Hypertension showed a low result with an SIR of less than 1, but a high result in the case of abnormal liver function. The workers' occurrence rates of hypertension, hyperlipidemia, kidney dysfunction, and anemia were lower than those of ordinary salaried employees. however, their occurrence rate for abnormal liver function was markedly higher. In lifestyle habits, the smoking rate of workers was low while the alcohol consumption rate was quite high. This study has improved the understanding of the health status of workers in a large oil refinery in Korea, and has shown the impact of lifestyle habits related to the work environment on chronic diseases.

• 대한가정학회지
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• 제33권5호
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• pp.221-239
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• 1995

Using a nonclinical sample of 566 female students, this study examines the frequency and the severity of child sexual abuse in Taegu area. It also analyzes the factors that determine the probability of experiencing both contact and noncontact forms of the abuse. The results show that children from low socio-economic status tend to experience severe types of contact abuse while children from higher socio-economic status ten to experience severe types of contact abuse while children from higher socio-economic status are likely to be exposed to noncontact abuse. The growing place in the childhood also affects the victimization to noncontact and contact abuse differently. The absence of the biological parents significantly contributes to the occurrence of contact abuse, but have no impact on the noncontact abuse. However, the closeness of the family members and frequent communication reduce the rates of both contact and noncontact abuse substantially.

• Journal of Nutrition and Health
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• 제41권4호
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• pp.327-340
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• 2008

This study was designed to investigate the correlation between nutrition status and cardiovascular disease in type 2 diabetes patients with metabolic syndrome. The subjects were 66 patients and divided into Non MS (a group without metabolic syndrome, n = 37) and MS (a group with metabolic syndrome, n = 29). The percentage of patients accompanying metabolic syndrome was 43.9% and family history such as DM, skipping meal and eating speed were higher in MS (P < 0.05) The average values of BMI, body fat (%), waist circumference were significantly higher in patients of MS than that of Non MS. For hamatological values, MS showed higher FRS, HOMA-IR, LDL-Cholesterol, CRP. Percentage of FRS was 21.63% in MS that is relatively higher in comparison with 16.81% in Non MS. Moreover, the incidence of cardiovascular disease appeared 13.8% in MS that is higher than 2.7% in Non MS. The intake of sodium and vitamin E were higher, but the intake of fat, vitamin A and zinc were lower in MS than in Non MS. Close correlations were elucidated among FRS, occurrence of cardiovascular disease, weight, waist circumference, Total-Cholesterol, LDLCholesterol, sodium in both groups. In conclusion, cardiovascular disease risk factors would be higher in type 2 diabetes patients with metabolic syndrome and there were distinctive patterns that were associated with hamatological values, nutrition intake risk factors. This result should be considered when designing nutrition study and intervetion programs.

• 한국지하수토양환경학회지:지하수토양환경
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• 제25권4호
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• pp.1-6
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• 2020

Recently, ex-situ remediation technologies has been emerging to clean up contaminated soils mainly because the in-situ techniques have limited applicability and technical difficulties in relatively small contaminated sites. Accordingly, implementation of off-site treatment and disposal have been continuously increased in soil remediation and restoration projects in Korea. However, in many cases, reclaimed soil is still not properly recycled or reused. Therefore, there is an urgent need to document the current status of soil management practices in soil remediation projects in the nation. This study presents a survey of soil contamination status and remedial approaches in Korea based on soil cleanup projects completed in 2015 - 2019, and proposes the possible options of the recycling or reusing the reclaimed soils under compliance with related regulations. The results of the soil survey showed soil contamination was most severe in gas stations, industrial facilities, and military areas. The major types of pollution were related to the petroleum-contaminated site (TPH and BTEX) with 77.0% occurrence in all the contaminated sites. The reclaimed soils were mostly reused as a ground filling-up soils in industrial facilities (60.0%) and warehouses (37.0%).

• 응용통계연구
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• 제21권4호
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• pp.649-658
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• 2008

외식산업의 발달과 함께 학교와 기업 등의 단체 급식이 증가하고 있는 오늘날, 관련분야에서는 식중독 예방에 대해 많은 관심을 갖고 연구하고 있다. 우리나라에서는 온도에 따른 세균의 증식속도를 이용하여 식중독지수를 개발하여 식중독 위험에 대한 정보를 제공하고 있는데 그 정보가 식중독 발생상황과는 차이가 있음이 지적되고 있다. 본 연구에서는 최근 3년간($2004{\sim}2006$년)의 일별 식중독 발생과 기상자료를 이용하여 일 최고기온, 습도, 월효과를 설명변수로 하고, 식중독 발생건수를 반응변수로 하는 로그선형모형(Log Linear Model)을 이용하여 식중독 발생의 위험을 예보할 수 있는 사고발생지수를 개발하였다. 개발된 지수와 기존지수를 비교한 결과 개발된 지수가 식중독 발생 상황을 반영함에 있어서 더 나은 설명력이 있음이 나타났다.

• Nuclear Engineering and Technology
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• 제47권1호
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• pp.74-84
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• 2015

If a transient occurs in a nuclear power plant (NPP), operators will try to protect the NPP by estimating the kind of abnormality and mitigating it based on recommended procedures. Similarly, operators take actions based on severe accident management guidelines when there is the possibility of a severe accident occurrence in an NPP. In any such situation, information about the occurrence time of severe accident-related events can be very important to operators to set up severe accident management strategies. Therefore, support systems that can quickly provide this kind of information will be very useful when operators try to manage severe accidents. In this research, the occurrence times of several events that could happen during a severe accident were predicted using support vector machines with short time variations of plant status variables inputs. For the preliminary step, the break location and size of a loss of coolant accident (LOCA) were identified. Training and testing data sets were obtained using the MAAP5 code. The results show that the proposed algorithm can correctly classify the break location of the LOCA and can estimate the break size of the LOCA very accurately. In addition, the occurrence times of severe accident major events were predicted under various severe accident paths, with reasonable error. With these results, it is expected that it will be possible to apply the proposed algorithm to real NPPs because the algorithm uses only the early phase data after the reactor SCRAM, which can be obtained accurately for accident simulations.

• 한국보건간호학회지
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• 제33권2호
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• pp.214-227
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• 2019

Purpose: This study examined the socio-demographic factors, the disaster related factors, the physical health related factors and the psychological factors of older adults exposed to natural disaster and these factors may possibly cause the occurrence of PTSD. Methods: A cross-sectional study was designed using the secondary data from the 3rd Disaster Victims Panel Survey (2012-2017). The data from 1,397 disaster victims were analyzed using descriptive statistics and logistic regression analysis. Results: Compared with the younger adult disaster victims, the elderly were more likely to have symptoms of PTSD (15.0% vs. 12.1%). Factors such as the number of years since being exposed to the disaster, anxiety, depression and social adjustment were significantly associated with occurrence of PTSD for both older and younger adults. Female gender was the additional risk factors for the older adults, while marital status, income, having witnessed another person's injury or death, and having lost a home were associated with the occurrence of PTSD. Conclusion: The elderly were more likely to develop PTSD as compared with younger adults. More targeted post-disaster mental health services to the elderly with the symptoms of depressive, anxiety and impaired social adjustments, should be provided to improve their mental health.