• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.14 no.4
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• pp.52-61
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• 2015

PCE(Passenger Car Equivalents) is used to analysis of road capacity and LOS(Level of Service). In this study calculates PCE by number of lane and 12 vehicle type by MOLIT(Minister of Land, Infra Structure and Transport) using individual vehicle data. The results of the calculation, PCEs are increased when high vehicle classification level, many number of lanes and weekend. Heavy vehicle factors are smaller than KHCM on 4, 6 lane. Also, In this study estimates of PCE variation model by heavy vehicle percentage. Impact of Heavy vehicles on PCEs is the most sensitive on 2 lane. The results of the study, heavy vehicles low impact on PCE on multi-lane and business trips are a little in weekend.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.14 no.4
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• pp.18-26
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• 2015

This study is a fundamental research to suggest a forecasting model for short-term railway passenger demand focusing on major lines (Gyeungbu, Honam, Jeonla, Janghang, Jungang) of Saemaeul rail and Mugunghwa rail. Also the author tried to verify the potential application of the proposed models. For this study, SARIMA model considering characteristics of seasonal trip is basically used, and daily mean forecasting models are independently constructed depending on weekday/weekend in order to consider characteristics of weekday/weekend trip and a legal holiday trip. Furthermore, intervention events having an impact on using the train such as introduction of new lines or EXPO are reflected in the model to increase reliability of the model. Finally, proposed models are confirmed to have high accuracy and reliability by verifying predictability of models. The proposed models of this research will be expected to utilize for establishing a plan for short-term operation of lines.

• KIEAE Journal
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• v.13 no.2
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• pp.67-76
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• 2013

The purpose of this study is to analyze the accessibility to the place for outdoor exercise. For that, the departure (resident) location of the users of outdoor exercise equipment within 12 parks in Seoul have been investigated. A total of 1,733 people have been surveyed during the two-week period between Aug.2 and Aug. 15 and 815 cases were analyzed. We also investigated demographic characteristics, access method and related factors such as location, climate and visiting time. The results were coded through ArcGis program and the accessibility to each exercise location, difference in regional accessibility and accessibility characteristics in terms of climate and time have been analyzed. The results are as follows: First, visitors to the Han River start from the places further than the visitors to the streamlines. Second, the average moving distance is longer for the users aged under-60 than for the users aged 60 and over to reach the exercise place. And the average moving distance for visitors to the Han River destination is the longest with 748 meters, followed by 203 meters for general parks and 92 meters for streamline parks, respectively. Third, in each non-waterfront parks, the moving distance by users under-60 was longer by about 230 meters than that by users 60 and over. Fourth, exercisers in the weekend travel more by 244 meters than those during the midweek users to reach the exercise place. Fifth, the number of visitors to the Han River increased in the weekend while visitors to the streamlines decreased in the same period. Sixth, the traveling length for bicycle users is three times as much as that for pedestrian visitors. And the departure locations of bicycle users were more widely distributed.

• The Journal of the Korea Contents Association
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• v.15 no.11
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• pp.582-590
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• 2015

Road type classification and K-factors are important role when design of number of lane. In this study not only classifies road type and estimating of K-factor but also economic evaluation tries for feasibility verification. Road type analysis results, time of day traffic volume variation, weekend-factor and vacation-factor are large in recreation roads. Weekday traffic volume and weekend traffic volume are similar patterns in provincial roads. AADT is high and time of day traffic volume variation is small in urban roads. In this study compares with economic analysis that designing of number of lane between KHCM's K-factor and this study K-factor. Economic analysis results, designed roads by this study's K-factor reduce cost about 4,708 hundred million won. So this study's K-factor is economical on provincial 4 lane roads.

• 한국태양에너지학회:학술대회논문집
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• 2011.04a
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• pp.127-132
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• 2011

Worldwide, the building energy simulation becomes inevitable step for predicting the energy consumption in building. In simulation process, the expertise is required for the accurate analysis results. In Korea, however, most of user use the inconsistent data with Korea circumstance. In this step, we need to construct the standard input data matched building in Korea. In this study, electricity consumption of apartments in Daejeon is analyzed. The yearly data of a apartment complexes of 2009 are analyzed as monthly, daily(week and weekend), timely, and completion year. With this result, we are able to predict the demand pattern of electricity in a house and make the schedule by demand pattern. The results of this study are followed. The averaged amount of electricity consumption in winter is higher than summer because of the high capacity of heating equipment. All of the house has electric base load from 0.26kWh to 0.5kWh. The average of the electricity consumption of month is shown as 326.7kWh. A week is seperated as 4 part such as week, weekend, Saturday and Sunday. During week, the average of timely electricity consumption is shown as 0.442kWh. The Saturday consumption is 0.453kWh. The Sunday is 0.461kWh.

• The Journal of the Korea Contents Association
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• v.15 no.5
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• pp.142-150
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• 2015

This study examines the effect of changes in the content distribution strategy on VOD usage by comparing the VOD usage pattern following the changes in the IPTV and Digital Cable SVOD holdback policy. The result of this study shows that after changing the SVOD holdback from one week to three weeks, the VOD usage decreased up to 50 percent while paid VOD revenue increased as a result of the rise in PPM. The time series analysis shows statistical decrease in the number of SVOD usage, SVOD usage per user, and PPV revenue per user while VOD revenue per user increased significantly. Moreover, SVOD usage within the drama genres such as mini-series, weekend series, weekend special series, and sitcom decreased significantly. This research provides a case study on the effect of the broadcaster's content distribution policy on the VOD user behavior thus proposing broadcasters and platform operators the ways of establishing distribution strategy as well as invigorating the VOD usage.

• Journal of Digital Convergence
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• v.18 no.4
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• pp.263-272
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• 2020

The purpose of this study was to identify the relationships between sleep time and depression and suicidal ideation in middle aged women. The subjects of this study were 1,617 women aged 40-64 years who participated in the Seventh Korea National Health and Nutrition Examination Survey (KNHANES VII-2), 2017. Data were downloaded from the KNHANES website and were analysed through complex sampling design data analysis using IBM SPSS 21.0 program. Suicidal ideation is 3.65 times higher in women who sleeps for five hours or less in weekend than in women who sleeps more than seven hours and less than nine hours in weekend. These result indicate that suicide prevention program for middle aged women should include strategies for maintaining proper sleep times and women who sleeps for five hours or less should be considered as a priority intervention case. In additions, further studies on the relationship between sleep times and depression of middle aged women should be conducted.

• Korean Journal of Veterinary Service
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• v.23 no.2
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• pp.105-112
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• 2000

This survey was conducted to evaluate the microbiological quality of raw beef and pork products from January to December in 1999. A total of 107 beef and 157 hog carcasses were collected from two abattoirs located in Seoul. The result showed that beef carcasses had an average bacterial loading around 139,000 bacteria/$\textrm{cm}^2$ of carcass surface, indicating a little bit higher count than the results reported in USA and Australian meat. However, overall hygienic status was found to be acceptable for all examined carcasses because 84.4% of product rated excellent, good or acceptable comparable to USA of 91.6% and Australia of 88%. The analysis of data on overnight-chilled to weekend-chilled carcasses indicated that the microbiological growth occurred in the chiller during the weekend chill with increases in total viable count from 130,000cfu/$\textrm{cm}^2$ to 400,000cfu/$\textrm{cm}^2$. Qualitative testing for escherichia coli, EC + MUG was used as a most probable number (MPN) method along with the petrifilm method. The average of MPN/$\textrm{cm}^2$ of E coli biotype 1 was 29MPN/$\textrm{cm}^2$ for beef carcasses and 1,100 MPN/$\textrm{cm}^2$ for hog carcasses, respectively. However, 41% of beef and 16.3% of hog carcasses were shown to be less than < 3 MPN/$\textrm{cm}^2$ in E coli biotype 1 examination. Although salmonella enteritis, S typhimurium and E coli O157:H7 were all negative, listeria monocytogenes was recovered from only one hog surface samples of the 89 carcasses tested.

• Journal of Digital Convergence
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• v.16 no.12
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• pp.383-393
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• 2018

The purpose of this study was to examine impact of multi-cultural family on subjective health status, mental health and internet addiction tendency compared to general family in Korean adolescent. The data were derived from the 13th Korea youth risk behavior web-based survey 2017 in Korea and analyzed considering complex samples analysis. The subjects were general families 61,320(98.5%) and multi-cultural families 956(1.5%). Multi-cultural youth had higher rates of unhealthy and unhappy and the percentage of depression, suicidal ideation, weekday and weekend smartphone overdependence, experience problems with using smartphone in friend than general youth. In addition, suicidal ideation 1.270 times, weekday and weekend smartphone overdependence 1.359 times and 1.297 times respectively and experience problems with using smartphone in friend 1.603 times was increased in multi-cultural youth compared to general youth. Therefore, it is very meaningful that this study provided basic data of intervention program to improve mental health and internet addiction tendency of multi-cultural youth.

• Journal of the Korea Safety Management & Science
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• v.24 no.2
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• pp.41-50
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• 2022

The food delivery platform labor market has been continuing to grow rapidly in Korea, which resulted in traffic accident increases of delivery riders. To prevent traffic accidents while delivery, this study conducted a survey for 462 delivery riders and analyzed the statistical relationships of delivery characteristics and risk perception with delivery accidents. The results of this study revealed that riders with young age (20s: 46.6%) and/or low delivery experience (less than 1 year: 50.6%) had significantly higher proportion of accident experience than other age groups (over 40s: 36.2%) and high delivery experience (more than 2 years: 36.4%). In addition, side job riders (61.5%) showed significantly higher proportion of accident experience than main job riders (39.1%). The riders with accident experience had more number of deliveries per hour (weekday: 3.56, weekend: 3.91) than the riders without accident experience (weekday: 3.29, weekend: 3.68). Lastly, the riders with accident experience rated significantly higher perceived level of risk on weather, violation of traffic laws, uninspected motorcycle, receiving calls while driving, missing safety training, missing personal protective equipment than the riders without accident experience. This study suggested four aspects based on the study results to prevent traffic accidents for delivery riders.