• Journal of agricultural medicine and community health
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• v.29 no.2
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• pp.223-235
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• 2004

Objectives: This study was to evaluate the actual condition of falls among community-dwelling elderly people and its related factors to prepare for the establishment of comprehensive prevention programs of senior population. Methods: The study subjects included 460 home residents over 65 years in a district of Chungnam Province and interviews were given to all of them, asking about experiences of falls and their related factors. The analysis of study results came to the following conclusions. Results: The rate of falls among total subjects was 35.5%. With the percentage by age and sex, over 70's and female were significantly higher than male(p=0.000) and under 69 (p=0.008). The groups with poor visual acuity and hearing ability had higher rate of falls than the normal groups based on their health status. In terms of place they experienced falls, out-door occurrence accounted for 53.4% of total falls, which was higher 46.6% of in-door. By season when falls are experienced, "winter" showed the greatest rate, and by time of the day, evening had the highest rate. By causes of falls, "Slippery ground"accounted for 30.5% and "Tumbled over" 23.5% of total falls, respectively, showing the major role of environmental causes for falls. For individual factors, "Irritability" and "Carelessness" occupied 11.3%, 10.8% of total falls, respectively. The Odds Ratios for falls in women was 2.19 times higher than in men, and those in 70's are 2.01 times higher than in 60's, and those with abnormal BMI was 3.68 times higher than in normal groups, and those with perceived symptoms was 1.94 times higher than those without. Conclusions: It is suggested that more consideration should be directed toward taking comprehensive and systematic prevention measures ranging from setting-up the injury-protective environments to allowing senior citizens to have competence in ADL activity as well as proper general health conditions, considering the higher rate of falls for elderly persons in a rural part of this country than that of western countries and the greater proportion of falls which can be ascribed to environmental factors.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.20 no.2
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• pp.149-155
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• 2020

The Korea Highway Traffic Authority provides statistics that analyze the causes of traffic accidents that occurred since 2015 using the Traffic Accident Analysis System (TAAS). it was reported Through TAAS that the driver's forward carelessness was the main cause of traffic accidents in 2018. As statistics on the cause of traffic accidents, 51.2 percent used mobile phones and watched DMB while driving, 14 percent did not secure safe distance, and 3.6 percent violated their duty to protect pedestrians, representing a total of 68.8 percent. In this paper, we propose a system that has improved the advanced driver assistance system ADAS (Advanced Driver Assistance Systems) by utilizing CNN (Convolutional Neural Network) among the algorithms of Deep Learning. The proposed system learns a model that classifies the movement of the driver's face and eyes using Conv2D techniques which are mainly used for Image processing, while recognizing and detecting objects around the vehicle with cameras attached to the front of the vehicle to recognize the driving environment. Then, using the learned visual steering model and driving environment data, the hazard is classified and detected in three stages, depending on the driver's view and driving environment to assist the driver with the forward and blind spots.

• Journal of the Korean Institute of Gas
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• v.18 no.3
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• pp.31-37
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• 2014

The aim of this work is to provide new experimental data on the pyrolysis characteristics and the minimum ignition energy (MIE) by using the same high-density polyethylene (HDPE) powder in domestic HDPE dust explosion accident. To evaluate the explosion sensitivity of HDPE, thermo-gravimetric analysis (TGA), differential scanning calorimeter (DSC) and MIE apparatus (MIKE-3, K$\ddot{u}$hner) was conducted. The measurements showed the volume median diameter of $61.6{\mu}m$ but the particle number density of 98 % in the range $0.4{\sim}4{\mu}m$. The ignition temperature from the results of TGA and DSC in HDPE dust layers was observed in the range of $380{\sim}490^{\circ}C$. MIE was measured under 1 mJ in the HDPE dust concentration of $1200{\sim}1800g/m^3$, it was found that the ratio of particle number density in the range $0.4{\sim}4{\mu}m$ was very high (98%).

• The Journal of the Korea Contents Association
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• v.17 no.12
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• pp.289-298
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• 2017

This study analyzed the accomplishment of the outsourcing production policy which forces broadcasting companies to schedule and broadcast more than a certain proportion of outsourcing production programs. According to the results from the examination of whether or not the policy increased the diversity of broadcasting programs, it is positive that a rise in the number of production companies resulting from the implementation of the outsourcing production policy increased the diversity of broadcasting program makers, but programs supplied were limited to certain genres, failing to be diverse. According to the results from the examination of whether or not the competitiveness of broadcasting and video contents increased, production conditions had not improved due to the controversy over the ownership of the right of production between terrestrial broadcasting companies and outsourcing production companies. In addition, though there was the positive effect of increasing export of broadcasting programs, the exports were limited to certain genres.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.18 no.3
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• pp.46-57
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• 2019

Generally speeding appeared to be the most contributing factor of fatalities occurred in work zones, and highway agencies in South Korea have concerned of the safety of workers and drivers in the poor circumstances. In this study, a portable variable message signs (PVMS) system as an alternative of control speeding in work zones was implemented. This study evaluated the safety effectiveness of the PVMS based on speeds and the compliance with the speed limit. Linear regression and logistic regression models were adopted to quantify the safety effect of the PVMS between the 'before' and 'after'. The results showed that most of points had statistically significant speeds reduction experience after PVMS installation. Also, the percentage of vehicle exceeding the speed limit by 10 km/h or more was decreased significantly between 50 and 80% in the 'after' periods compared to the 'before' periods. Therefore, the PVMS would be contributed to benefit safety in work zones which there is a difference in design speed of the adjacent normal section.

• Journal of the Korean Society of Marine Environment & Safety
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• v.23 no.1
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• pp.26-32
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• 2017

Enlargement and speed-up of a ship and diversification of ship's type have served to greatly increase the importance of marine transport means. It's reported that accident occurrence frequency of collision is high next to engine damage among the ship accident types, and that the accident ratio according to human factors is also high. In addition, ship accidents come to occur caused by complex cause factors rather than a sole cause factor, it is necessary to investigate the cause factors through the written verdict. This study proposed the cause factors of collision ship accident on the basis of human factors in collision ship accident among the written verdicts provided by the Korean Maritime Safety Tribunal, and inquired into the cause factor and effect through the correlation analysis of accident occurrence factors. Also, this study predicted the collision accident through analyzed the major cause factor of the occurrence at the zero minute when collision on the basis of the time taken from the time point of detecting collision of ships to the time point of collision occurrence. This study used commercial software-Statistical Package for Social Sciences (SPSS Ver21.0) to do correlation analysis. For time analysis, this study analyzed the cause factor and time by analyzing the time taken from the time point of detected ships to the time point of collision occurrence on the basis of the written verdicts. The study analysis showed that there were many cases of collision ship accidents occurrence caused by more than two sorts of cause factors, and that the case (zero minute) where there is no time to spare for collision avoidance accounted for 36.1 %, and negligence in guard or surveillance of the other ship, and sailing while drowsy, or drinking was a contributor to an accident. Poor watch keeping is very strong relationship with pool ready for sail.

• The Korean Journal of Financial Studies
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• v.9 no.1
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• pp.119-144
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• 2003

본 연구에서는 1997년부터 2001년 기간 동안 증권거래소와 KOSDAQ 시장에서 액면분할을 실시한 기업을 대상으로 액면분할의 이사회 공시일을 사건일로 하여 사건일 전후 30일간의 주가, 유동성 지표, 기업수익성 지표 등을 이용하여 액면분할 공시에 따른 시장의 반응을 분석하고, 아울러 액면분할의 신호효과와 유동성 효과를 검증하였다. 본 연구에 이용된 자료는 검증기간 동안 다른 정보의 유입이 없는 순수자료를 이용하여 거래소 상장기업 72개와 KOSDAQ 100개 기업이 최종적으로 표본에 선정되었다. 본 연구에서 액면분할을 실시한 기업들은 두 시장 모두에서 대체로 양의 초과수익률을 나타내었고, 분할비율이 높을수록 양의 초과수익률이 상대적으로 더 강하게 지속되었다. 이런 결과는 미래 기업수익이 호전된다는 신호를 보내기 위하여 액면분할을 실시한다는 신호효과로 인한 것이 아니며, 동시에 고주가의 주식이 액면분할로 투자자금에 제약이 있는 투자자가 투자 가능한 저주가로 전환됨으로써 유동성의 증대를 가져온 결과라고 보기에도 무리가 있다. 액면분할이라는 그 자체가 논리적 근거도 없이 투자자에게 호재로 받아들여져 거래량의 증가를 가져왔다고 판단된다. 이런 현상은 KOSDAQ 시장에서 더욱 확연하게 나타났는데, 1997년부터 2001년까지의 분석기간 중에 KOSDAQ 시장의 무분별한 투기적 열풍이 이런 현상의 원인을 제공한 것이라고 추론된다. 액면분할이 한국시장의 투자자에게 호재로 받아들여진 것에는 액면분할 이후 대체로 주가가 양의 초과수익률을 나타내는 경우가 있었다는 과거의 경험적 사례가 작용한 것으로 아니가 예상된다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.24 no.5
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• pp.504-510
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• 2018

Marine casualties are caused mainly by collisions and grounding, due to human error. The SMART Navigation Service is preparing a measure to reduce marine casualties caused by human error and establish an LTE Accident Vulnerability Monitoring System (SV10) to evaluate the danger of collision or grounding for a vessel based on location information collected on land. This service will also share real-time vessel locations and danger information with related agencies to enable them to respond more quickly to accidents on land. In this study, statistical reports on marine casualties and investigation reports provided by the Korea Maritime Safety Tribunal are analyzed, so the percentage of marine casualties that could be reduced using the SV10 service could be identified.

• The Korean Journal of Food And Nutrition
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• v.16 no.4
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• pp.340-346
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• 2003

The diet food used in this test was composed of the total 16 kinds, such as refined water, herb extract, pomegranate extract, polydextrose and isomalto-oligosaccharide etc. Edible fiber as a major component in dietary food was contained to 2.60%(w/w) level. But the calorie was 104.57kca1/100g, contrast of control domestic saengshick product was 368.06kca1. As a result, calorie of dietary food sample was very low level. Vitamin and mineral as a minor component were determined 5, 6 kinds, respectively. On the other hand, dietary effect of body weight loss was determined about 14%(w/w) at animal test result used for rats during 4 weeks. The reason of dietary effect could confirmed from change of plasma neutral lipids, total cholesterol and HDL-cholesterol concentration. Increasing ratio of these in the general diet and dietary diet feeding groups during 4 weeks were 10.55, 6.90, 9.82% and 6.11, 3.85, 6.11%, respectively. from these results, decrease reason of body weight could confirmed the relative relationship with plasma lipids and cholesterol concentration. But plasma plasma glucose and insulin concentration have not positive relativity.

• Information Systems Review
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• v.21 no.2
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• pp.139-155
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• 2019

Recently, the domestic e-commerce market has achieved remarkable growth through the spread of e-commerce throughout the industry. Nevertheless, the ratio of e-commerce use by our small and medium-sized enterprises has turned out to be very low. The reason for this low participation rate of SMEs in B2B e-commerce market is due to various reasons, but also the lack of empirical performance measurement and evaluation considering the characteristics of B2B e-commerce market in which SMEs participate. Therefore, this study was intended to analyze the effectiveness of B2B e-commerce use of B2B e-commerce to companies that are provided in conjunction with e-Marketplace by public credit guarantee agencies with experience in use. To this end, 14 items related to finance derived through prior research were used to conduct management performance analysis and hypothesis verification from a financial perspective. The implications of this study are expected to be that an empirical performance analysis from the financial perspective of a B2B e-commerce guarantee Utilized company can be used as a basis for policymaking for the activation of the B2B e-commerce guarantee in the future, thus contributing to the establishment of a stable business environment by supporting the expansion of e-commerce by small and medium-sized businesses.