• 보건의료산업학회지
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• 제3권2호
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• pp.1-15
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• 2009

The purpose of this study is to analyze the internal factors that influence the performance of local government hospitals in Korea. There are 34 hospitals in korea as of 2008. Among these hospitals 5 are profit-making and the other loss-making in terms of profitability. Data was collected by Institute of local government hospital union. The major findings of this study was as follows : Firstly, 7 hospitals are high level, over than 100% of fixed ratio. But that result was better than the other study 5 years ago. Secondly, 29 hospitals are bellow 85% of bed occupancy rate. There are a number of hospitals didn't use the facilities and the personnel cost in total costs are high. And lastly, as a result of multiple regression analysis, the factors had on significant effect on normal profit to total assets are personnel cost(-), liability to total assets(-), average length of stay(-), outpatient visits to inpatient days(-). In conclusion, to improve the profitability of hospitals, the efforts to reduce personnel cost and to increase bed occupancy rate.

• 건축역사연구
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• 제8권1호
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• pp.29-40
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• 1999

This paper discusses the change of land ownership in the urban historical core of Kyungju city in the Period of Japanese occupancy(1910-45) based on the analysis of land register records. Kyungju city was not designated for the cities controlled by urban planning law which was set up in 1912 and 1934. The major purpose of this paper is to clarify the urbanization process of a Korean local city where the formal urban planning projects were not carried out. The focus of the study is the increase of the Japanese landowners and Japanization of the landscape. In the very beginning of occupation, Japanese already owned about 8% of the total land of the city centre where the old Kyungju castle had been located. The ratio of the land owned by Japanese went up to more or less 70% at the end of World war II. The process which the urban core had been replaced for the Japanese is very clearly traced from the analysis of a land register records.

• 대한토목학회논문집
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• 제32권6D호
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• pp.557-563
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• 2012

본 연구에서는 광역경제권, 특히 대구광역권 내의 산업공간구조를 분석하기 위하여 국가교통DB센터에서 제공하는 화물O/D 자료를 이용하는 방법을 제시하고자 한다. 이를 위해 화물점유율(FOR), 화물의존도(FDR), 규모를 반영한 Scale parameter의 세 가지 지표를 이용하여 대구광역권의 공간구조 분석을 실시하였다. 그 결과, 화물의 이동패턴을 고려한 각 지표들로부터 지역간 산업구조 특성 및 산업공간구조를 알아보는 데 유의미한 결과가 도출되었다. 특히, 대구시의 경우 경산시, 구미시의 화물점유율(FOR)과 화물의존도(FDR) 비율이 매우 높은 지역 연관성을 가지는 것으로 나타났고 규모를 반영한 SP지표 결과에 따르면 대구시의 주요산업은 화학 및 금속공업이 주를 이루는 것으로 나타났다.

• 보건행정학회지
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• 제13권3호
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• pp.129-147
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• 2003

This study is to grasp a trend of profitability classified by characteristics of hospitals and to analyze related factors. Subjects are 145 hospitals which have gotten the standardization audit by Korean Hospital Association during 1998-200l. Profitability was measured in the aspect of operation profit rate with operating margin to gross revenue as proxy variables. Independent variables were classified by general factors (ownership, number of beds, period of establishment, competition), financial factors (liabilities to total assets, current ratio, fixed ratio, total asset turnover, inventories turnover), and factors related to patient treatment (average length of stay, bed occupancy rate, new outpatient ratio, admission ratio of outpatients, number of patients per specialist, personnel costs per adjusted inpatient, administrative costs per adjusted inpatient). Hierarchical multiple regression analysis model was used in this study. As a result of hierarchical multiple regression analyzation of operating margin to gross revenue, adjustive $R^2$ of general factors was relatively more powerful. The factors had significant effect on operating margin to gross revenue were ownership(+), number of beds(+), competition(+), current ratio(+), fixed ratio(+), total asset turnover(+), personnel costs per adjusted inpatient(-).

• 대한토목학회논문집
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• 제29권3D호
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• pp.335-345
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• 2009

일반적으로 도로시설의 기본구간에 대한 서비스수준(LOS)의 효과척도로 밀도가 사용되지만, 도로시설의 현장에서 관측된 관측밀도와 교통특성자료로부터 산정된 산정밀도사이에는 오차가 발생할 수 있기 때문에 도로시설의 서비스수준을 제대로 나타낼 수가 없다. 따라서 본 연구의 목적은 연구대상 도시고속도로의 본선구간 상에 관측기기를 설치하여 실시간의 교통특성 자료(교통량, 속도, 점유율, 차두시간, 차두거리 등)를 수집 조사하고, 수집 조사된 교통특성자료의 상호관계로부터 연구대상 기본구간 상의 최대 교통류율을 비교 분석하며, 비교 분석된 최대 교통류율을 중심으로 각 서비스수준별 점유율과 v/c비율사이의 관계에 기초하여 도시고속도로의 기본구간에서 서비스수준의 평가기준을 산정 평가하고자 하는데 있다.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2009년도 추계학술발표대회 논문집
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• pp.115-120
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• 2009

Since the middle of 1990, "High Rise Residential Complex" has been started to construct to fulfill the use of high density land use. In addition, it bacame a major solution for a rehabilitation project to achieve a high volume ratio, which in turn brings a good business. In this study, POE is applied to secure residential satisfaction level between Apartment and High Rise Residential complex. Also life style differences are investigated between the two type of complexes. It was resulted that recent High Rise Residential Complex is quite acceptable in most respects, however interior vetillation and direct wind flow from living space through dining - kitchen to ease the cooking scent is not a satisfactory level. These two factors are most highly demanded for future design of High Rise Complex in considering specialties in our cultural life style.

• 한국안전학회지
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• 제27권4호
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• pp.83-89
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• 2012

In order for start-up establishment to enter the business market, it has to get over the first mover advantage of the existing establishment. As a result, its working condition deteriorates and a great deal of occupational accidents take place. Based on 2009 standard, the occupational accident rate of start-up establishment is 1.28%, which is two times higher than existing establishment and the gap between manufacturing and service industry has been getting wide. For the characteristic of injured person in start-up establishment, it is showed that the occupancy rate of women and people with less than 30 age starting out in a career is high and the occupancy rate of occupational accident for holiday and night work is high. Therefore, the act for occupational accident prevention is needed in the early period of business and underprivileged group for occupational accident.

• 로봇학회논문지
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• 제13권2호
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• pp.79-85
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• 2018

This study focuses on autonomous exploration based on map expansion for an underwater robot equipped with acoustic sonars. Map expansion is applicable to large-area mapping, but it may affect localization accuracy. Thus, as the key contribution of this paper, we propose a method for underwater autonomous exploration wherein the robot determines the trade-off between map expansion ratio and position accuracy, selects which of the two has higher priority, and then moves to a mission step. An occupancy grid map is synthesized by utilizing the measurements of an acoustic range sonar that determines the probability of occupancy. This information is then used to determine a path to the frontier, which becomes the new search point. During area searching and map building, the robot revisits artificial landmarks to improve its position accuracy as based on imaging sonar-based recognition and EKF-SLAM if the position accuracy is above the predetermined threshold. Additionally, real-time experiments were conducted by using an underwater robot, yShark, to validate the proposed method, and the analysis of the results is discussed herein.

• ETRI Journal
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• 제28권3호
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• pp.301-310
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• 2006

In mobile communications, a class of variable-complexity algorithms for convolutional decoding known as sequential decoding algorithms is of interest since they have a computational time that could vary with changing channel conditions. The Fano algorithm is one well-known version of a sequential decoding algorithm. Since the decoding time of a Fano decoder follows the Pareto distribution, which is a heavy-tailed distribution parameterized by the channel signal-to-noise ratio (SNR), buffers are required to absorb the variable decoding delays of Fano decoders. Furthermore, since the decoding time drawn by a certain Pareto distribution can become unbounded, a maximum limit is often employed by a practical decoder to limit the worst-case decoding time. In this paper, we investigate the relations between buffer occupancy, decoding time, and channel conditions in a system where the Fano decoder is not allowed to run with unbounded decoding time. A timeout limit is thus imposed so that the decoding will be terminated if the decoding time reaches the limit. We use discrete-time semi-Markov models to describe such a Fano decoding system with timeout limits. Our queuing analysis provides expressions characterizing the average buffer occupancy as a function of channel conditions and timeout limits. Both numerical and simulation results are provided to validate the analytical results.

• Nuclear Engineering and Technology
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• 제54권3호
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• pp.1136-1144
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• 2022

The effects of nearby residents and the public by the residual contamination from the decommissioning of nuclear facilities should comply with the dose criteria, and whether additional remediation action is necessary from the ALARA perspective must be determined. Therefore, we analyzed the requirements of ALARA action levels and performed preliminary ALARA evaluation. The ratio of residual contamination concentration to DCGL was calculated for the basement fill and the building occupancy mode. The results showed that the additional remediation actions below DCGL are not justified. In addition, we analyzed the effect of remediation area. It was noted that the increase of the remediation area showed a positive correlation with the Conc/DCGL value in the basement fill mode. On the other hand, in the building occupancy mode, since the floor area of the building is the target of remediation and has the effect of increasing the same as the evaluation area of the building occupants, but due to the difference in the amount of increase, the Conc/DCGL showed a negative correlation. We expect the approach and method of ALARA evaluation can be utilized for concrete cost-benefit calculation during the decommissioning or at the time of remediation.