• The Journal of Asian Finance, Economics and Business
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• v.9 no.4
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• pp.315-324
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• 2022

The goal of this study is to understand better the relationship between hospital bed occupancy rate and cost rigidity as a proxy for the degree of hospital bed congestion, as well as the relationship between the risk of changes in hospital bed occupancy rate and congestion cost, targeting public hospitals. As public hospitals for analysis, we selected hospital projects from the Public Enterprises Survey Reports published by the Department of Public Enterprises, Ministry of Finance, and obtained unbalanced panel data consisting of 1,505 hospitals and 15 years, totaling 12,595 hospitals and years. The analysis revealed that the risk of changes in the bed occupancy rate increases the degree of cost rigidity and leads to a decrease in the variable cost ratio; furthermore, an increase in the bed occupancy rate decreases the degree of cost rigidity and leads to an increase in the variable cost ratio. These findings suggest that although public hospitals are taking managerial actions to avoid congestion costs, congestion costs resulting from higher bed occupancy rates have not been eliminated. The regression analysis results show that even if congestion costs arise as the occupancy rate increases, they are covered by the increase in revenue associated with the increase in the occupancy rate.

• The Transactions of the Korean Institute of Electrical Engineers D
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• v.51 no.12
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• pp.577-582
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• 2002

The objective of this paper is to produce a weighted graph map for path-planning of an autonomous mobile robot(AMR) based on the measurements from a single ultrasonic sensor, which are acquired when the autonomous mobile robot explores unknown indoor circumstance. The AMR navigates in th unknown space by following the wall and gathers the range data using the ultrasonic sensor, from which the occupancy grid map is constructed by associating the range data with occupancy certainties. Then, the occupancy grid map is converted to a weighted graph map suing morphological image processing and thinning algorithms. the path- planning for autonomous navigation of a mobile robot can be carried out based on the occupancy grid map. These procedures are implemented and tested using an AMR, and primary results are presented in this paper.

• Journal of the Korean Institute of Landscape Architecture International Edition
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• no.1
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• pp.183-191
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• 2001

The purpose of this study is to provide guidelines for planning, designing and managing neighborhood parks. Results form POE(Post-Occupancy-Evaluation) and RPOE(Re-Post-Occupancy-Evaluation) are analyzed for this study. Bundang Central Park in Bundang Newtown was selected for this study. This study compared the previous POE completed in 1996 with a RPOE conducted in 2001 to find out how the user, proximate environmental context, and the park administration changed in time and apply feedback for purposes of immediate problem solving. The results of this study showed that RPOE has to be initiated and utilized periodically as a device and the guideline for neighborhood park design, conservation, administration and operation.

• The Research Journal of the Costume Culture
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• v.10 no.1
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• pp.76-88
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• 2002

The aim of this study was to describe how the type of appeal and linguistic expression of men's wear advertisement in magazines by analyzing domestic men's and ladies' magazines published from 1990 to 1999. The periodical change in advertisement trend was also discussed. 1. Type of Linguistic expression The type of linguistic expression used in advertisements far men's wear could be classified into the following five categories : emotional expression, sensual expression, egoistic expression, informative expression, and brand name expression. The periodical trend in the use of each type of linguistic expression was as follows: the occupancy rate for the type of emotional expression was roughly 50 percent in the early 90's (1990-1993) and this percentage gradually decreased during the mid 90's (1994-1196) until the late 90's (1997-1990). Despite the decrease in occupancy rate, this type was the most commonly used. While the occupancy rate fur the type of informative expression gradually increased during the decade, occupancy growth fur the type of brand name expression was slight until its rapid expansion in the late 90's. The occupancy rate for the type of egoistic expression steadily increased during the early and mid 90's but decreased to its original percentage in the late 90's. As for the sensual expression, its occupancy was insignificant up to the mid 90's and then rapidly decreased in the late 90's. 2. Type of appeal The type of appeal used in men's wear advertisements could be classified into the four categories, sensitive appeal, sex appeal, image appeal, and quality appeal. The periodical trend in the use of each type of appeal was as follows: sensitive appeal was most commonly used during the decade ; it had an occupancy rate over 50 percent in the early 90's but the rate gradually decreased during the mid and late 90's. Sexual appeal were the least commonly used; though the occupancy rate increased during the early and mid 90's it dropped dramatically in the late 97's. The occupancy rate for image appeal gradually decreased until its growth in the late 90's. The occupancy rate fur quality appeal was insignificant in the early 90's. This percentage rapidly increased in the mid 90's but relapsed in the late 90's.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.30 no.6D
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• pp.569-575
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• 2010

The occupancy based O/D is essential for measuring efficiency of various transportation policies like HOV/HOT lane, ramp metering, and public parking station. There has been many studies on occupancy survey methodology and O/D estimation using TCS (Toll Collection System) data separately. The occupancy O/D estimation methodology using TCS data has not been attempted thus far. An overall process from data collection stage to the occupancy O/D estimation stage has been suggested. Field survey was performed at the northbound Seoul toll station of Gyeongbu Expressway by each 2 hours of AM peak, PM non-peak, PM peak, midnight periods on a day. The process of matching the TCS data and field survey data classified by tollbooth ID, car type/mode, and arrival time was also performed. One typical output of the results showed that the ratio of single occupancy vehicles bounding for Seoul during the AM peak amounted to 60%. With the key output of this study and the specific O/D estimation methodology suggested, the whole centroid-to-centroid occupancy O/D of the country could be available, and then various applications in which the occupancy information is required could be possible.

• Journal of Advanced Navigation Technology
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• v.20 no.3
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• pp.167-174
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• 2016

Runway and taxiway is base facilities for aircraft take off and landing and runway capacity is one of major factor for airport capacity. Runway occupancy time is affect on the runway capacity. The identification of aircraft using taxiway by analysis of airport ground surveillance data and the measurement of pass time on the points is general method for the confirmation of the runway occupancy time. This study is runway occupancy time analysis of landing airplane using ADS-B message, in this study we surveyed landing aircraft runway occupancy time and analysis of serviced record using taxiway include rapid exit taxiway. The result of analysis is to confirm the different of landing direction and aircraft category on the same runway caused by structure of airport. Also the result of runway occupancy time analyzed data, it is base input data for the air transportation simulation.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.1
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• pp.553-561
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• 2021

The purposes of this study are to propose evacuation recommendations through evacuation model considering occupancy load model in child care center with disabilities. To achieve these purposes, the survey on the occupancy load and egress model and evacuation experiments have carried out, and evacuation occupancy load model for child care center with disabilities are suggested. The results of this study are as follows : (1) The evacuation plan for children with disabilities are necessary special considerations according the type and levels of disability, and various egress means and method for children in child care center with disabilities conditions. (2) The evacuation occupancy loads are different with non-impaired children and evacuation occupancy loads and evacuation corridors width are necessary considering impaired children's evacuation behaviors. (3) The temporal evacuation area(refuge area) is essential for children with disability who are impossible vertical evacuation such as impaired children using wheelchair and cerebral palsy.

• Journal of the Korean housing association
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• v.26 no.4
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• pp.23-32
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• 2015

The purpose of this research is to analyze characteristics and related factors of IAQ (Indoor Air Quality) in newly built wooden houses by measuring pre and post occupancy. The subjects were five wooden houses which were built with similar materials and completed from July to December 2013. Measuring factors were TVOC, HCHO, PM10, $CO_2$, CO, indoor temperature, and relative humidity. As the result of pre occupancy measuring, the houses that revealed the lowest TVOC concentration or HCHO concentration were satisfied with "the standard for newly built apartment houses". Therefore, IAQ by the wooden structures is considered to be in good condition. However, in cases of partial value exceeded the standard, the reason is analyzed to be the materials of molding, wrapping doors, built-in closet, or kitchen furniture, etc. rather than structure materials. Most PM10 concentration level showed slightly below "the standard for occupied multi-use facilities". Remaining of construction dust was considered to be the reason. As the result of post occupancy measuring, every value except of one subject's TVOC concentration was lower than pre occupancy, explaining the importance of natural ventilation.

• Journal of the Korean Solar Energy Society
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• v.37 no.2
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• pp.23-33
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• 2017

Accurate prediction of stochastic behavior of occupants is a well known problem for improving prediction performance of building energy use. Many researchers have been tried various sensors that have information on the status of occupant such as $CO_2$ sensor, infrared motion detector, RFID etc. to predict occupants, while others have been developed some algorithm to find occupancy probability with those sensors or some indirect monitoring data such as energy consumption in spaces. In this research, various sensor data and energy consumption data are utilized for decision tree algorithms (C4.5 & CART) for estimation of sub-hourly occupancy status. Although the experiment is limited by space (private room) and period (cooling season), the prediction result shows good agreement of above 95% accuracy when energy consumption data are used instead of measured $CO_2$ value. This result indicates potential of IoT data for awareness of indoor environmental status.

• Journal of the Korean Solar Energy Society
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• v.31 no.2
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• pp.128-134
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• 2011

The objective of this study is to analyze the major factors of indoor environment that affect the satisfaction of the occupancy in multi-family residential buildings. The results of this study can contribute to improving the comfort of the residents effectively as they are applied preferentially at the design and construction stages. The indoor environment factors investigated for the analysis included thermal, light, air and the acoustic environment. The individual factors were derived from the 'indoor environment' assessment indices of the green building certificate systems of various countries. Based on these, a questionnaire was prepared to conduct the Post Occupancy Evaluation. The survey results were statistically analyzed.