• The KIPS Transactions:PartA
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• v.8A no.3
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• pp.217-226
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• 2001

In this paper, for continuous media access operations performed by Clustered Continuous Media Storage Server (CCMSS) system, we present the analytical model based on the open queueing network, which considers simultaneously two critical delay factors, the disk I/O and the internal network, in the CCMSS system. And we derive by using the analytical model the stochastic model for the total service delay time in the system. Next, we propose the integrated stochastic admission control model for the CCMSS system, which estimate the maximum number of admittable service requests at the allowable service failure rate by using the derived stochastic model and apply the derived number of requests in the admission control operation. For the performance evaluation of the proposed model, we evaluated the deadline miss rates by means of the previous stochastic model considering only the disk I/O and the propose stochastic model considering the disk I/O and the internal network, and compared the values with the results obtained from the simulation under the real cluster-based distributed media server environment. The evaluation showed that the proposed admission control policy reflects more precisely the delay factors in the CCMSS system.

• Health Policy and Management
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• v.26 no.1
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• pp.4-11
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• 2016

Background: Hospital admissions for ambulatory care sensitive conditions (ACSCs), which are widely used as an indicator of poor access to primary care, can be used as an efficiency indicator of healthcare use in countries providing good access to health care. Korea, which has a national health insurance (NHI) system and a good supply of health care resources, is one such country. To quantify admission rates of ACSC and identify characteristics influencing variation in Korean health care institutions. Methods: By using NHI claims data, we computed the mean ACSC admission rate for all institutions with ACSC admissions. Results: The average ACSC admission rate for 4,461 institutions was 1.45%. Hospitals and clinics with inpatient beds showed larger variations in the ACSC admission rate (0%-87.9% and 0%-99.6%, respectively) and a higher coefficient of variation (7.96 and 2.29) than general/tertiary care hospitals (0%-19.1%, 0.85). The regression analysis results indicate that the ACSC admission rate was significantly higher for hospitals than for clinics (${\beta}=0.986$, p<0.05), and for private corporate institutions than public institutions (${\beta}=0.271$, p<0.05). Conclusion: Substantial variations in ACSC admission rates could suggest the potential problem of inefficient use of healthcare resources. Since hospitals and private corporate institutions tend to increase ACSC admission rates, future health policy should focus on these types of institutions.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.11
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• pp.4220-4227
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• 2010

Recently there have been many arguments about the admission officers system, but the majority of researches about admission officer has not focused student performance. We compared learning performances of students selected by admission officers and students selected by standardized test. We checked the marks of students at college entrance point and the average grade for their freshman year. Analyzing the data, we got two major findings. At the point of entrance, the students selected by admission officers had less performances. But the analysis of average grade for 1 year, there were no statistical differences between two groups of students.

• Journal of Korean Institute of Industrial Engineers
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• v.34 no.4
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• pp.445-459
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• 2008

This paper addresses a call admission control(CAC) scheme giving handoff calls a priority over new calls for OFDMA wireless communication systems. The characteristics of OFDMA system and a variety of user QoS (Quality of Service) requirements are incorporated into the proposed CAC scheme which consists of several optimization modules for the system resource(subcarriers and power) allocations. The mathematical models and its solution methods for the embedded resource allocation problems are proposed. Some extensive computational experiments are conducted to illustrate the superiority of our CAC.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05c
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• pp.2137-2140
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• 2003

최근 IP 역추적을 위한 다양한 연구가 진행되고 있다. 피 중 주목할 만한 역추적 시스템인 확률적 패킷 마킹 기법은 대량의 패킷을 필요로 하는 분산 서비스 거부 공격의 특징을 이용한 매우 효율적이고 실용적인 접근 방식이다. 그러나 이 방식은 모든 라우터의 수정이 불가피하다는 점과 공격을 당한 피해 시스템에서 완벽한 공격 경로를 재구성하기 위해 엄청난 부담을 짊어지게 되는 문제점을 드러냈다. 이러한 문제점에 대한 해결책으로 본 논문에서는 네트워크에 유입되는 패킷에 출발지 라우터의 주소만을 마킹하는 Admission Packet Marking 기법을 제안하고 기존 연구와의 비친 분석을 통해 기존 인터넷에의 적용 가능성을 판단한다.

• Journal of Acupuncture Research
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• v.19 no.2
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• pp.201-210
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• 2002

Objective : The aim of this study was to assess the effects of admission care on Bell's palsy by case control study. Method : 27 patients who diagnosed as Bell's palsy were shared 13 inpatients group treated by early admission care, and 14 outpatients group. They were equally treated with acupuncture, herb medicine and western medicine. The groups were evaluated by Yanagihara,s unweighted grading system at pre-treatment, after 5 days, after 10 days and after 15 days. Results : The Yanagihara,s scores of 2 groups showed stastically significant improvement in comparison with pre-treatment. In improvement index after treatment, the Yanagihara,s scores of 2 groups increased but were not stastically significant the difference. Conclusion : These results provided that the admission care may not be a valuable treatment for Bell's palsy. Further study is needed to evaluate the effect of early admission care on Bell's palsy.

• The Korean Journal of Health Service Management
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• v.8 no.3
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• pp.13-25
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• 2014

This research was performed to investigate the characteristics and determination factors on tertiary hospital inpatients. The used data was the four waves of Korea Health Panel(2008, 2009, 2010, 2011), and the number of subjects was 4,430 cases of tertiary and general hospital admission. The statistical methodology used in the study is the logistic regression model. The significant affecting factors in utilizing tertiary hospital admission were gender, marital status, education, household income, residence region and ICD-10 classification. Man, graduating college/university, married, high-income were socio-economic affecting factors in tertiary hospital admission. Medical need factor of ICD-10 classification and residence region of inpatients was also significant affecting factors in tertiary hospital admission. The 81.4% of inpatients at tertiary hospital had chronic disease and the 12.9% of inpatients readmitted, the 68.2% had a selecting doctor and the only 26.7% of inpatients reinforced by private medical insurance. This study recommended the Korean government to provide proper rule for tertiary hospital admission in order to improve the equity and efficiency of health care system.

• Management Science and Financial Engineering
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• v.14 no.1
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• pp.35-63
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• 2008

We discuss the problem of selecting profitable customer orders arriving at a company providing two classes of services. For an arriving customer order for the first class, the company 1) makes a decision whether to accept or reject it (admission control), or 2) decides a price of the order to offer to an arriving customer (pricing control). The customer order undergoing processing in the system may be cancelled owing to unavoidable circumstances with the customer. The second class of service is provided as a sideline, which prevents the server from being idle when all the customer orders for the first class are completed and delivered. This yields the sideline profit. We discuss both admission control and pricing control problems in an identical framework as well as examine the structure of the optimal policies maximizing the total expected present discounted net profit gained over an infinite planning horizon.

• Journal of The Korean Association of Information Education
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• v.21 no.1
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• pp.33-40
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• 2017

The purpose of this study is to compare the differences in academic achievement, department satisfaction, and department preference according to the entrance admission for the computer education of G National University of Education. As a result of collecting and analyzing, for three years, the academic achievement data of the students who have excelled in the specific area and regular entering students, it is found that the achievement of the students who excelled in the specific area is relatively higher. The results of the questionnaire survey showed that students who excel in specific areas were more satisfied with their departments than those who entered regularly. The reason for the high academic achievement and academic satisfaction of the students in the specific area seems to be the high loyalty to the department by the students who are interested in the computer. Therefore, it can be seen that it is necessary to consider how to select students for each enriched course at the entrance examination of education universities. In addition, as the era of the fourth industrial revolution comes, the number of students wishing to pursue computer education is expected to increase.

• Health Policy and Management
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• v.3 no.1
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• pp.1-24
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• 1993

This study is designed to find clues to make a plan for efficient hospital bed utilization. Author has tried to estimate the level of appropriateness and to find out factors affecting intra-hospital variation of inappropriate bed utilization using modified Appropriateness Evaluation Protocol of which criteria are based on service intensity and patients' conditions. Systematic random sampling was done from the population of inpatients during one month in on university hospital. Data were collected by concurrent and retrospective medical record review and analysed by multiple logistic regression. In medical services, 83.5% of admission reveals appropriate and the level of inappropriate admission shows significant differences by patients' residence, type of department admitted to, admission 개\ulcorner, and length of stay. In surgical services, 97.3% and 34.7% are appropriate in location and timing of surgery respectively. Inappropriate timing of surgery differs significantly depending on patients' age, type of department admitted to, admission route, and length of stay. Sixty two percent of hospital days shows appropriate and the level of inappropriateness show marked differences by patients'age, type of services, admission routes, part of the month, part of the stay, and length of stay. Inappropriate hospital days are due to inappropriate level of care, premature admission, improper scheduling of diagnostic or therapeutic procedures, and problems in scheduling surgery in sequence. In conclusion, substantially high proportion of inappropriate hospital bed utilization was confirmed. To reduce it, it is necessary to develop alternative services with which can replace inpatient services, and to introduce utilization management system which may include internal peer review.