• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.217-218
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• 2022

본 논문에서는 코로나19 팬더믹(pandemic)으로 최근 3년가 비대면 강의가 대부분 이루어졌고, 자연스럽게 비대면 교수법 또한 여러 가지 형태로 시도되어졌다. 게더타운(Gather Town)이라는 온라인 화상회의 공간을 2D게임화 시켜서 세계적인 인기에 힘입어 본교 학생 500명 가까이 활용해 보았고, 이후 국내에서 3D기반의 매타버스 플랫폼 디토랜드(DITO LAND)를 개발하여 본교 학생 300여명의 학생들을 대상으로 실시하여 2D, 3D 기반의 장단점을 파악하게 되었다. 이를 바탕으로 추후 어떠한 방향으로 메타버스 콘텐츠를 활용한 교수법이 더 효과가 있을 것인지 예측하고, 메타버스 콘텐츠 개발자들에게 조금이라도 도움을 주고자 한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.10
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• pp.2959-2965
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• 2009

This research is based on the medical information record of a university hospital on analysis of outpatients, inpatients and delivery related information in gynecology area. The result of application having analysis of patients as basic material for hospital management is as follows. The number of new patients in average was 140.9, and as the year passes by, it seemed to decrease noticeably(p=0.000). In the first year (2001) the number was only 212.6, but increased to 140 by the year of 2007, showing increase of 80.9. The actual number of patients in the hospital was 124.6 in average and it showed noticeable decrease after each year (p=0.000), from 144.6 patients on the first year 2001, to 104.8 patients in 2007, showing approximately 40 patients decreased. Multiple regression analysis was performed having independent variables as characteristics of patients and cause of delivery related factors, and dependent variables as the number of patients in the hospital. According to analysis, the cause of affecting the number of patients in the hospital was selected as the number of new patients, the number of delivery per year. The reliability rate was recorded as 62.8%. Therefore, apart from the services on marketing and patient management which must come first, the effect of inviting them cannot be avoided, which directly links to trust resulting from the consideration to patients.

• Proceedings of the Korea Water Resources Association Conference
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• 2012.05a
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• pp.669-673
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• 2012

제방안전성 모니터링은 제방파괴로부터 국민의 생명과 재산을 보호하는데 필요한 정보를 얻을 수 있는 하나의 방법이 될 수 있다. 근래에 미국은 2005년 허리케인 카타리나에 의해 2,000여명의 인명손실을 경험하였고 2011년 3월 일본은 도후쿠지역의 초강력 지진에 의한 쓰나미로 인해 수만명의 인명과 후쿠시마 원자력 발전소의 침수로 지금까지 방사능 누출 차단작업을 벌이고 있다. 국내에서는 4대강 복원사업으로 주요 국가 하천 구간에서 홍수 및 체제 불안정에 의한 제방붕괴사고위험이 현격하게 줄어들었으나 제방의 안전성은 더욱 강조되고 있다. 즉 신설된 보 주변, 배수통문 신설구간 그리고 제방누수 예상지점 등에서는 아직 안전한 상태라고 확신할 수 없으며 지속적인 모니터링이 요구된다. 따라서 본 연구에서는 광섬유를 이용하여 개발한 간극수압 및 온도 센서 등을 위험예상지점에 설치하고 정보시스템을 통하여 어떻게 관리 할 것인가에 대한 사전 검토를 계획하였다. 이를 위하여 제방에 센서를 설치하기 전에 주요 검토사항에 대하여 연구분석하였다. 주요 검토사항에는 설치하고자 하는 지점의 제방거동 메커니즘 예측, 왜 계측시스템을 설치하는지에 대한 목적에 대한 평가, 설치 지점의 제방의 토질공학적 문제점 파악, 모니터링 대상 매개변수 혹은 항목 선정, 조사대상 항목의 변화정도를 예측하여 거동 범위 확정, 적정 계측기기 설치 지점을 선청, 계측기기 선정, 자동화 혹은 실시간 정보시스템에 필요한 사항 결정, 관측에 영향을 미치는 인자들의 기록 계획, 정보의 타당성 확보를 위한 필요사항 정립, 비용의 결정, 장기 예측 계획, 정기 검 보정 및 관리 계획, 자료수집 및 관리계획, 자원의 공조 및 생애주기 비용 등을 포함하였다.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.18 no.6
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• pp.468-476
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• 2006

The paper deals with the numerical analysis of contaminants emission from the material affected by temperature variation in floor heating system. Considering mass transfer and heat transfer theories, a computer program for the analysis of VOCs emission was made. To demonstrate the accuracy of the numerical solution, the prediction results and the measured data were compared. Using this program, emission rates of the materials in the bakeout space and the no bake-out space were compared to estimate the variation of emission rate.

• Journal of the Architectural Institute of Korea Structure & Construction
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• v.36 no.3
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• pp.169-176
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• 2020

The authors developed a nodal network model that simulates the flow of moist air and the thermal behavior of a target area. The nodal network model was enhanced using a parameter estimation technique based on the measured temperature, humidity, and schedule data. However, the nodal model is not good enough for predicting humidity of the target space, having 55.6% of CVRMSE. It is because re-evaporation effect could not be modeled due to uncertain factors in the field measurement. Hence, a data-driven model was introduced using an artificial neural network (ANN). It was found that the data-driven model is suitable for predicting the condensation compared to the nodal model satisfying ASHRAE Guideline with 3.36% of CVRMSE for temprature, relative humidity, and surface temperature on average. The model will be embedded in automated devices for real-time predictive control, to minimize the risk of surface condensation at dressroom in an apartment housing.

• Journal of Teachers' Pension
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• v.2
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• pp.181-206
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• 2017

출산율 하락과 기대여명 증가에 따라 인구구조의 고령화가 급격히 진행되고 있다. 이에 따라 소득보장이나 건강보장과 같은 사회보장제도의 장기 재정 불안정과 관련된 사회적 우려가 높다. 여러 세대를 거쳐 사회보장제도를 안정적으로 유지하기 위해서는 제도의 장기적 재정 상태에 대한 정확한 전망이 요청된다. 재정 상태에 대한 정확한 진단은 장기 재정 안정화를 위한 가장 기본적인 전제 조건이며, 정확한 재정 상태에 대한 평가 없이 재정 안정화를 위한 사회적 합의를 도출하는 것은 가능하지 않다. 본 연구는 사학연금의 장기 재정 전망에 필요한 사망률 전망 방법을 검토함으로써 사학연금 장기 재정 전망 작업의 정확성과 신뢰성을 높이고자 하는 목적을 가지고 있다. 보다 구체적으로, 본 연구는 연앙인구 및 사망 건수 자료가 제한적인 동시에 단기 시계열 자료만이 존재하는 사학연금 데이터베이스의 특성을 반영한 사망률 전망 모형을 구축하고 있다. 사학연금 남성 사망률 전망과 관련하여 본 연구에서 제안하는 모형은 목표 집단의 사망력 패턴과 밀접히 연관된 준거 집단을 통합적으로 모형화하는 정합적 사망률 모형(coherent mortality model)이다. 반면 관측된 사망 건수가 매우 제한적인 관계로 사학연금 데이터베이스에 기초하여 사망률을 전망하기 쉽지 않은 여성 사망률의 경우 통계청 장래인구추계에서 전망된 성별 사망확률 격차가 사학연금에도 적용될 수 있다는 가정하에 사학연금 여성 사망률을 전망하는 방법을 제안하고 있다.

• Journal of Hospice and Palliative Care
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• v.21 no.3
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• pp.75-83
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• 2018

Purpose: To provide effective palliative care, it is important to predict not only patients' life expectancy but their discharge status at a time of inpatient admission to a hospice care facility. This study was aimed to identify meaningful life expectancy indicators that can be used to predict patients' discharge status on admission to the facility. Methods: Among 568 patients who were admitted to the hospice ward of P hospital from April 1, 2016 through December 31, 2017, 377 terminal cancer patients were selected. This retrospective cohort study was performed by using performance status, symptoms and signs, socioeconomic status, laboratory findings on admission. Results: Alive discharge was associated with a good performance status that was measured with the Karnofsky and Eastern Cooperative Oncology Group (ECOG) scales and the Global health and Mental status. Less anorexia, dyspnea, dysphagia and fatigue were also associated with symptoms and signs. Associated laboratory findings were close to normal Complete Blood Cell (CBC) count, Liver Function Test (LFT) and Blood Urea Nitrogen (BUN). Conclusion: Our findings suggest that Karnofsky Performance Status (KPS), ECOG, Global health, Mental status, anorexia, dyspnea, dysphagia, fatigue, CBC, LFT, BUN are meaningful indicators when predicting discharge status for inpatients. Further investigation is warranted.

• Journal of the Korean Society of Marine Environment & Safety
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• v.22 no.6
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• pp.671-678
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• 2016

This study estimates the demands for safety training courses with reference to research on safety training records, seafarer statistics, target groups for safety training, expiry dates of existing safety courses, seafarer employment rates, the retirement age, etc. These results are compared with the seating capacity of the maritime training institute to analyze the anticipated increase in and convergence of demand can be accommodated. The average annual safety training needs for the next five years according to the Seafarers Act include approximately 10,444 people, and the proper annual seating capacity of the maritime training institute is approximately 7,280 people at present. Thus, in order to respond to an increasing demand for safety training, it is necessary to expand the capacity of the safety training facility.

• Journal of Hospice and Palliative Care
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• v.9 no.1
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• pp.35-39
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• 2006

A 77-year-old female presented panperitonitis due to advanced gastric ranter during palliative care. In the case of panperitonitis following obstruction or perforation, surgical treatment is vital to avoid fatal sepsis and dehydration. However, the risk of surgery and the residual life of a patient must be carefully considered because of high mortality and complication rate in those patients with advanced disease due to the poor condition. The therapeutic value of aggressive hydration, nasogastric tube insertion, and the use of antibiotics is also questionable. Palliative surgery was not performed on this case, and she passed away peacefully in the presence of family after 4 days of palliative medical care. Here is the appropriate management for this kind of patients we would like to recommend through review of relevant references and long discussions. Firstly, we need to predict survival time using clinical variables. Secondly, considering patient status and risk of surgery, non surgical palliative care such as pain control, transient nasogastric tube insertion, and parenteral hydration is recommended. Minimal use of fluid is desirable to minimize complications such as edema and dyspnea if massive hydration in the beginning of treatment is not proved to be effective. Even though started earlier in the course of disease, discontinuation of antibiotics could be discussed with patients and their caregiver if patient status is not improved.

• Journal of Hospice and Palliative Care
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• v.11 no.4
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• pp.181-187
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• 2008

Purpose: In order to establish efficient palliative treatment plans. It is important to estimate the survival time of a terminally ill cancer patient as accurate as possible. Proper estimation of life expectancy aids not only in improving the quality of life of the patient, it also promotes productive communication between the medical staff and the patient. The aim of this study is to determine the efficacy of neutrophil-lymphocyte ratio as a predictor of survival time in terminally ill cancer patients. Methods: Between January 2004 and June 2007, 67 terminally ill cancer patients who were admitted or transferred for palliative care, were included. Patients were categorized into three groups by Neutrophil-Lymphocyte Ratio. Demographic characteristics, clinical characteristics and blood samples were analyzed. Results: In univariate analysis, survival time of the highest Neutrophil-Lymphocyte Ratio group (${\geq}12.5$) was significantly shorter than that of the others (hazard ratio (HR)=3.270, P=0.001). After adjustment for low performance status (ECOG score 4) and dyspnea, high Neutrophil-Lymphocyte Ratio (${\geq}12.5$) was significantly and independently associated with short survival time (HR=2.907, P=0.007). Neutrophil-Lymphocyte Ratio was also significantly increased before death (P=0.001). Conclusion: Neutrophil-Lymphocyte Ratio can be useful in predicting life expectancy in terminally ill cancer patients.