• Journal of Korean Society of Transportation
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• v.28 no.5
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• pp.155-162
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• 2010

Elderly pedestrians account for more than 30% of all deaths in traffic accident and the number of elderly-related traffic accidents are increasing every year. Considering Korea's quickly aging society, drastic measures must henceforth be taken. Taking notice of the elderly living in and moving around the provinces, this research focused on analyzing the characteristics of elderly pedistrians' traffic accidents on provincial roads and developing an Equivalent Property Damage Only (EPDO) model. The authors collected 720 traffic accident data points from the police agency and developed the EPDO model, weighted differently by light injury, severe injury, and death using Multiple Regression Analysis. As a result, the speed of vehicles is the most influential variable in EPDO, and the shape of the road is significant as well. Therefore, various policies should be established like improving the environmental factors of provincial roads, like expanding speed-reduction treatments and signage, and setting up detours around areas of high elderly concentration.

• Journal of the Korea Convergence Society
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• v.11 no.12
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• pp.419-427
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• 2020

This study is designed to explore the effects of symptoms severity and stress on depression in patients with overactive bladder syndrome in the middle age. The subjects of the study were 167 middle-aged patients aged 40 to 60 who were diagnosed with overactive bladder syndrome in outpatient clinics and hospitals located in G Metropolitan City. The data analysis was using the SPSS 23.0 program and frequency analysis, Pearson's correction, t-test, and multiple regulation. The study found that the factors that affect depression in patients with the disease in middle age are symptom severity, age, living with a spouse. Therefore, in order to reduce the subject's depression, it is necessary to develop a program that can educate active treatment induction, lifestyle habit correction, and behavior therapy, and perform customized nursing interventions according to age group and spouse presence.

• Clinical and Experimental Pediatrics
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• v.45 no.8
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• pp.967-972
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• 2002

Purpose : A retrospective study was undertaken to evaluate the usefulness of low risk criteria for identifying febrile infants younger than three months unlikely to have serious bacterial infection. Methods : We conducted a retrospective study of 527 infants younger than three month with a axillary temperature ${\geq}37.4^{\circ}C$. If they met the following all four criteria, appear well, WBC $5,000-20,000/mm^3$, urine stick WBC(-) and nitrite(-), CSF WBC < $10/mm^3$, they were considered at low risk for serious bacterial infection(SBI). SBI was defined as a positive culture of urine, blood, or cerebrospinal fluid. The sensitivity, specificity, negative predictive value and positive predictive value of the low risk criteria were calculated. Results : Of 527 febrile infants, 110(21.0%) had serious bacterial infections. The 2.7% who met the low risk criteria had SBI and negative predictive value was 97.3%. SBI was diagnosed in 103 infants(38.6%) who didn't meet the low risk criteria including urinary tract infection(78.6%), most commonly, bacteremia(16.5%), bacterial meningitis(8.7%), Salmonella gastroenteritis(1%), osteomyelitis( 1%), septic arthritis of hip joint(1%). There were no differences in the sensitivity and negative predictive value according to the monthly-age-group. Conclusion : This low risk criteria to identify infants unlikely to have SBI early is available, however low risk infants must be carefully observed.

• Korean Journal of Psychosomatic Medicine
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• v.29 no.1
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• pp.17-25
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• 2021

Objectives : This study aimed to investigate quality of life, severity of depression, suicidality, subjective health and subjective stress of depression with subjective cognitive decline in Korean adults. Methods : We used the 7th KNHANES data to enroll 415 participants with a score of 10 or higher on Patient Health Questionnaire-9 (PHQ-9), aged 20-64. Depression was divided into two groups based on the presence/absence of subjective cognitive decline. Demographic and psychological characteristics were compared between two groups. Correlation analysis of subjective cognitive decline, quality of life, depression, suicidal idea was carried out. To detect which variables influenced quality of life, a multiple regression analysis was carried out. Results : Among the 415 participants, 98 had depression with subjective cognitive decline. We identified significant differences in age, marital status, education, employment between the two groups. After adjusting for these variables, depression with subjective cognitive decline had lower EuroQol-5D index scores, more severe depressive symptoms without cognition and worse subjective health than depression without cognitive decline. There was a significant correlation between subjective cognitive decline and quality of life (r=-0.236, p<0.001), suicidal idea (r=0.182, p<0.001), depression score without cognition (r=0.108, p=0.028). Through multiple regression analysis, subjective cognitive decline was predictor of reduced quality of life (β=-0.178, p<0.001). Conclusions : Depression with subjective cognitive decline has poor quality of life and severe depression. Cognitive decline should be considered to improve treatment result in depression.

• Sleep Medicine and Psychophysiology
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• v.27 no.2
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• pp.56-66
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• 2020

Objectives: In this study, the clinical characteristics of OSA patients and the quality of life before and after CPAP use were compared to determine the degree of improvement in quality of life according to CPAP use. Methods: Age, sex, height, weight, body mass index, Epworth Sleepiness Scale, Modified Mallampatti Score, Montreal Cognitive Assessment-Korean, and Pittsburgh Sleep Quality Index were compared between men and women through medical records. To understand the degree of improvement in quality of life resulting from use of CPAP, a personal telephone call was made to compare the VAS scores for quality of life before and after CPAP use. Results: In height (HT) (Z = -4.525, p < 0.001), weight (BW) (Z = -2.844, p < 0.05), sleep quality (PSQI) (Z = -2.671, p < 0.05), and arousal index (AI) (Z = -2.105, p < 0.05), there was a difference between men and women (p < 0.05). There was no difference in the remaining variables. Cross-analysis (Chi-square test) confirmed a difference between severity and sex of OSA. It has been found that there is no statistically significant order in size according to level-specific severity of OSA for PreCPAP QOL, PostCPAP QOL, CPAPUse Months, and CPAP4Hr/d (%) (p > 0.05). The difference between AHI before and after CPAP was 36.48 ± 21.54 (t = 11.609, p < 0.001) and the difference between QOL before and after CPAP was -25.43 ± 22.06 (t = -7.901, p < 0.001), both of which were significant (p < 0.001). Conclusion: Among OSA patients, there were differences in height (HT), weight (BW), sleep quality (PSQI), arousal index (AI), and severity of OSA between men and women, but the quality of life before and after CPAP was different. However, there was no difference between men and women in quality of life before and after CPAP. In addition, quality of life in OSA patients improved after using CPAP.

• Korean Journal of Psychosomatic Medicine
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• v.31 no.2
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• pp.89-99
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• 2023

Objectives : In this study, elderly hospitalized patients aged 65 years or older who were admitted to a university hospital and referred to the department of psychiatry were classified into youngest-old, middle-old, and oldest-old. It was conducted to find out what factors contribute to the agitation pattern by age group, whether there is a difference in the factors, and whether there is a difference in the severity of the agitation pattern. Methods : From July 1, 2021 to December 31, 2021, the medical records of patients aged 65 years or older who were referred to the department of psychiatry were retrospectively reviewed. Age, gender, route of hospitalization, department of referral, reason for referral, treatment method, presence of internal and surgical diseases, and hematological test data were investigated. Results : There was a significant correlation with the RASS score in cases of surgery referral and high CRP levels for youngest-old aged 65 to 74 years, in cases of surgery referral, dementia and hyponatremia for middle-old aged 75 to 84 years, in case of dementia for oldest-old aged 85 years old or older. In addition, there were differences in the severity of agitation patterns between age groups. Conclusions : As the age group increases, the agitation of delirium patients becomes more severe, and various factors contributing to the agitation pattern also differ by age group. Therefore, when treating elderly patients with delirium, attention should be paid to factors that may affect agitation depending on age.

• The Korean Journal of Applied Statistics
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• v.14 no.2
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• pp.475-486
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• 2001

데이터마이닝 패키지에 구현된 분류나무 알고리즘 가운데 CART, CHAID, QUEST, C4.5에서 변수 선택법을 비교하였다. CART의 전체탐색법이 편의를 갖는다는 사실은 잘알려졌으며, 여기서는 상품화된 패키지들에서 이들 알고리즘의 편의와 선택력을 모의실험 연구를 통하여 비교하였다. 상용 패키지로는 CART, Enterprise Miner, AnswerTree, Clementine을 사용하였다. 본 논문의 제한된 모의실험 연구 결과에 의하면 C4.5와 CART는 모두 변수선택에서 심각한 편의를 갖고 있으며, CHAID와 QUEST는 비교적 안정된 결과를 보여주고 있었다.

• Proceedings of the Korea Multimedia Society Conference
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• 2000.04a
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• pp.319-323
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• 2000

인터넷이 활성화되면서 청소년에게 유해한 영상을 제공하는 사이트들이 급속히 범람하고 있으며, 이로 인해 청소년들의 정신 건강이 심각하게 훼손되고 있다. 본 논문에서는 청소년들이 접근하기 쉬운 유해 URL 의 웹문서에 대해 그 문서 내에 포함되어 있는 영상들의 유해성을 판별하여 유해 영상을 선택적으로 차단할 수 있는 시스템을 구현하여 제시한다. 유해 URL들에 대해 실험한 결과, 제안한 시스템의 효율은 full nudity의 경우에는 89.6% , 반라의 경우는 70.1% 의 차단 효율을 나타내었으며, 얼굴영상의 경우는 2%의 오판별이 있었다.

• The Korean Journal of Financial Management
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• v.17 no.1
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• pp.1-12
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• 2000

본 논문은 5대 재벌 계열사들을 대상으로 재벌의 상호지급보증이 재벌의 지배구조 및 자본구조와 어떤 관련이 있는가를 실증적으로 분석하였다. 지급보증을 분석하면 지배주주의 지분율이 작은 회사일수록 그리고 상장기업일수록 타계열사에 대한 지급보증이 커진다는 것이 확인되었다. 한편 피지급보증을 보면 지배주주 지분율이 별로 영향을 주지 않는 것으로 분석되었다. 이러한 결과는 지배주주와 소액주주사이의 대리인문제가 계열사로부터의 피지급보증보다는 주로 계열사에 대한 지급보증에서 나타나고 있는 것을 시사하고 있다. 부채의존도가 높은 기업일수록 계열사에 대한 지급보증이 크다는 분석결과는 우리나라 금융기관과 재벌사이의 부채의 대리인문제가 심각하다는 것을 시사하고 있다.

• Vending industry
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• v.10 no.2 s.31
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• pp.20-22
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• 2011

서울시 영업신고된 커피자판기가 불과 9,463대로 채 1만대도 안되는 것으로 나타났다. 이 수치는 최근 서울시청 식품안전과에서 제공한 자료이다. 9,463대의 수량은 서울시 커피자판기가 급격히 줄고 있다는 사실을 시사한다. 지난 2009년에 발표 자료는 14,387대였으니 무려 34.3%가 줄어들었다. 커피자판기의 심각한 위기를 나타내는 결과를 산업계는 어떻게 받아들여야 할까? 충격적이지만 열악한 시장현실을 제대로 인식하여 커피자판기 경쟁력 강화의 계기로 삼아야 할 것이다.