• 한국통신학회논문지
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• 제23권9A호
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• pp.2184-2196
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• 1998

Admission control is one of the most important congestion control mechanism to be executed at the call set up phase by regulating traffic into a network in a preventive way. An efficient QOS evaluation or bandwidth estimation method is required for call admission to be decided in real time. In this paper, we spropose a computtionally simple approximation method of estimating cell loss probability and mean cell delay for admission control of both delay sensitive and loss sensitive calls. Mixed input queueing system, where a new call combines with the existing traffic, is used as a queueing model for QOS estimation. Also traffic parameters are suggested to characterize both a new call and existing traffic. Aggregate traffic is approximated by a renewal process with these traffic parameters and then mean delay and cell loss probability are detemined using appropriate approximation formulas. The accuracy of this approximation approach is examined by comparing their results with exact analysis or simulation results of vrious mixed unput queueing systems. Based on this QOS estimation method, call admission control scheme which is traffic independent and computable in yeal time are proposed.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2004년도 제22회 춘계학술대회논문집
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• pp.861-866
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• 2004

A numerical flow analysis has been performed on the partial admission turbine of KARI turbopump to support the aerodynamic and structural dynamic assessments. The flow-field in a partial admission turbine is essentially three dimensional and unsteady because of a tip clearance and a finite number of nozzles. Therefore the mixing plane method is generally not appropriate. To avoid heavy computational load due to an unsteady three dimensional calculation, a frozen rotor method was implemented in steady calculation. It adopted a rotating frame in the grid block of a rotor blade by adding some source terms in governing equations. Its results were compared with a mixing plane method. The frozen rotor method can detect the variation of flow-field dependent upon the blade's circumferential position relative to the nozzle. It gives a idea of wake loss mechanism starting from the lip of a nozzle. This wake loss was assumed to be one of the most difficult issues in turbine designers. Thus, the frozen rotor approach has proven to be an efficient and robust tool in design of a partial admission turbine.

• 정보처리학회논문지C
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• 제9C권6호
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• pp.927-934
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• 2002

유선망에서 이루어지는 다양한 멀티미디어 서비스를 무선망에서 지원하기 위해서는 단말이 최초 서비스를 받기 시작할 때와 단말의 이동에 의해 핸드오프가 일어날 때에 주위 셀의 상태와 다양한 클래스의 트래픽 특성을 고려한 무선 호 수락 제어 문제가 해결되어야 할 것이다. 본 논문에서는 2차원 셀룰라 구조 환경에서 가상 클러스터 개념을 이용한 신뢰성 있는 분산 호 수락 제어 기법을 제안하고 한다. 임의의 호의 진행시간동안 신뢰성 있는 호의 진행을 위해서 모든 호들의 호 수락 제어 단계에서 서비스를 받으려 하는 호가 직접 속해 있는 셀의 1ㆍ2차 인접 셀까지의 상태를 고려한 좀 더 신중하고 신뢰성 있는 호 수락 제어의 모델이다. 수학적 분석 및 시뮬레이션을 통하여 제안된 모델의 성능을 평가한다.

• 대한한방내과학회지
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• 제42권4호
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• pp.622-627
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• 2021

Objective: This study was designed to analyze the utility of routine chest X-ray on Korean medicine hospital admission. Methods: The chest X-ray reports and medical records of 618 patients who were admitted to Daejeon Korean Medicine Hospital from May 1, 2021 to June 30, 2021 were retrospectively reviewed. Results: Of the 618 patients newly hospitalized from May 1, 2021 to June 30, 2021, 560 patients (excluding readmission) were analyzed. The mean age of 560 patients was 53.26±17.20 years. There were 52 patients with abnormal findings, and their mean age was 69.62±15.59 years. Many of these patients had chest symptoms and a history of chest disease. There was no case that showed a significant diagnostic result by chest X-ray examination. Conclusion: The diagnostic usefulness of routine chest X-rays in Korean medicine hospital admission is low. But this does not mean that there is no need to perform routine chest X-rays upon admission.

• 한국전문물리치료학회지
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• 제31권1호
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• pp.48-54
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• 2024

Background: Promoting patients' safe return home at discharge and reducing length of stay in hospital is key for Restorative Rehabilitation Institution (RMI). Objects: This study was designed to identify the factors influencing the return to home and length of stay among various factors. Methods: A total of 120 stroke patients (76 males and 44 females) who were hospitalized in an adult inpatient unit of a RMI for more than 2 months were retrospectively analyzed for this study (multivariate logistic regression analyses, p < 0.001). As predictor variables for assessing the return to home and length of stay, demographic data (sex, age, duration between onset and admission, length of stay, caregiver after discharge, occupation after discharge, reason for discharge, and household type after discharge) were collected. Additionally, following measurements were selectively collected from patient's medical records: scores of Mini-Mental State Examination Korean version (K-MMSE), modified Barthel Index Korean version (K-MBI), Berg Balance Scale and Functional Ambulation Category were obtained at admission and discharge. Results: The K-MMSE at admission and K-MBI at discharge were found to be the predictors of return to home. Additionally, K-MBI at admission influenced the length of stay. Conclusion: This study suggests cognitive functioning at admission and the level of activities of daily living at discharge predicted the return to home and length of stay.

• 대한산업공학회지
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• 제35권2호
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• pp.171-177
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• 2009

This study presents the switching strategy between admission control and pricing control policies and clarifies the properties of the switching strategy in an M/M/1/K queueing system. In addition, this study demonstrates that employing the switching strategy can significantly improve the maximum total expected profit.

• 의학교육논단
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• 제12권2호
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• pp.13-18
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• 2010

This study is aimed to reflect non-cognitive traits that should be assessed in admissions interviews for medical school applicants, with the goal being to increase the reliability of the admissions interview. The admissions interview is valued for its ability to assess noncognitive and nonteachable attributes of good doctors, especially which cannot be evaluated with other admission assessment tools. Various characteristics of applicants including age, gender, exam scores, and nonverbal communication were found to have influenced the interview results. Bias from interviewers was a significant factor in the results of the interview. A Structured interview in multiple stations such as the Multiple Mini-Interview showed the highest reliability and validity. To make the interview fair, no information about the applicants was provided to the interviewers and interviewers were recruited from different backgrounds. There have been few research papers on admission interviews in Korea. Active research on the qualities of good doctors and effective and reliable admission interview methods should be encouraged. A strategy should be developed to overcome the philosophical obstacles that medical school professors want to admit academically excellent applicants.

• 보건행정학회지
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• 제5권2호
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• pp.18-34
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• 1995

To clarify the relationship between the medical supply(medical persons and goods) and the use of bed, the author has made comparison among OECD 24 countries. Per Capita Bed-days can be divided into Average Length of Stay and Admission Rate, and these three variables were regressed upon both In-patient Care Beds of all medical institutions including acute somatic, psychiatric, special, nursing homes and other long-term care and Share of Total Health Employment in Total Employment. The result of regression analysis shows a statistically significant positive relationship between In-patient Care Beds and Average Length of Stay, and negative relationship between Share of Total Health Employment and Admission Rate. In addition to Ordinary Least Square(OLS) estimation, amended Bounded Influence Estimation(BIE) was also made to adjust the influence of outliers. Japan shows a very large number of In-patient Care Beds and a very low Share of Total Health Employment, and this medical situation is judged to have close relation to her long Average Length of Stay and low Admission Rate.

• 한국의료질향상학회지
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• 제12권1호
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• pp.62-76
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• 2006

Background : There were so many patients who are waiting for admission in Emergency room in spite of more than one hundred empty beds everyday. This study was conducted to evaluate admission-discharge module system by OCS which reduce empty beds. Methods : The data of bed utilization in general beds from 2004 were reviewed. For evaluation of performance at admission-discharge module system by OCS, the change of Occupancy of bed were calculated. Results : The percentage of Average Bed Emptiness was changed from 13.8% to 9.2%. The residents in surgery(100%) and in internal medicine(75.5%) approved this system. Conclusion : The personnel in hospital recognized that it was very important to manage bed. The management of beds by OCS was helpful to reduce empty beds and was important.

• 만화애니메이션 연구
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• 통권9호
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• pp.283-293
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• 2005

연구는 수도권을 중심으로 한 4년제 대학의 교육목표와 그에 따른 입학실기시험의 유형을 분석하여 학교별 특성화의 방향을 살펴본 결과 다음과 같은 효과를 기대할 수 있으리라 생각된다. 첫째 수요자인 고교에서대학의 정확한 정보를 통한 입시준비를 할 수 있게 한다. 둘째 애니메이션에 적합한 표준 실기시험유형을 도출할 수 있다. 셋째 대학입시에 대한 객관성과 투명성 그리고 신뢰성을 줄 수 있다. 넷째 대학 스스로는 특성화를 강화하는 단초로 활용하며 예비자원인 수험생들에게는 차별화된 대학의 특성화 정보를 제공한다.