• Tuberculosis and Respiratory Diseases
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• v.61 no.3
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• pp.265-272
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• 2006

Background: Chest wall deformities such as kyphoscoliosis, thoracoplasty, and fibrothorax cause ventilatory insufficiency that can lead to chronic respiratory failure, with recurrent fatal acute respiratory failure(ARF). This study evaluated the frequency and outcome of ARF, the physiologic status, and the long-term prognosis of these patients. Methods: Twenty-nine patients with chest wall disorders, who experienced the first requirement of ventilatory support from ARF were examined. The mortality and recurrence rate of ARF, the pulmonary functions with arterial blood gas analysis, the efficacy of home oxygen therapy, and the long-term survival rate were investigated. Results: 1) The mortality of the first ARF was 24.1%. ARF recurred more than once in 72.7% of the remaining 22 patients, and overall rate of successful weaning was 73.2%. 2) Twenty-two patients who recovered from the first ARF showed a restrictive ventilatory impairment with a mean FVC and TLC of 37.2% and 62.4 % of predicted value, respectively, and a mean $PaCO_{2}$ of 57mmHg. Among the parameters of pulmonaty functions. the FVC(p=0.01) and VC(p=0.02) showed a significant correlation with the $PaCO_{2}$ level. 3) There were no significant differences between the patients treated with conservative medical treatment only and those with additional home oxygen therapy due to significant hypoxemia in the patients with recurrent ARF and the mortality. 4) The 1, 3, 5-year survival rates were 75%, 66%, and 57%, respectively, in the 20 patients who had recovered from the first ARF, excluding the two patients managed by non-invasive nocturnal ventilatory support. Conclusion: These results suggest that active ventilatory support should be provided to patients with ARF and chest wall disorders. However, considering recurrent ARF and weak effect of home oxygen therapy, non-invasive domiciliary ventilation is recommended in those patients with these conditions to achieve a better long-term prognosis.

• Journal of Korean Society of Transportation
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• v.35 no.6
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• pp.511-524
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• 2017

This study aims to evaluate the availability of ABM (Active-Based Model), FEATHERS, as a policy evaluation tool. To achieve the goal, scenario analysis on flexible working policy was conducted to measure its impact on activity-travel behavior. As a consequence, there seems no significant change in worker's daily life, other than mitigating traffic congestion due to decreasing commuting travel in the rush hour. The result of VKT (vehicle kilometers traveled) shows an opposite pattern according to given household/individual constraints. The scenario analysis on telecommuting indicates a decreasing trend in both travel frequency and distance because of the diminished number of commuting trips. As the activity space of telecommuters is shifted to a residential area, there are more short-distance trips by using non-motorized transport, which leads to decrease in VKT (using a private vehicle). Thus, the sensitivity of VKT by population groups varies due to transport mode shift (between personal and another mode) and growing non-work trips (using a private mode). This study found few things. First, it is necessary to evaluate the details of policy impact by population groups since it can be varied depending on household/individual characteristics. Second, the case study shows a promising performance of ABM as policy measurement that provides reality in policy evaluation. Third, ABM allows us to do more accurate analysis (i.e. time-series analysis by population groups) of policy assessment than those of FSM (Four-Step Model). Lastly, a further effort in data collection, literature review, and expert survey should be made to enhance the accuracy and confidence of future research.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.5
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• pp.411-422
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• 2021

The purpose of this study is to examine the relationships between quality of life and demographic characteristics and health-related behavioral characteristics, and their relevance to variables that represent health conditions among metropolitan-dwelling older adults. The study subjects were 380 senior citizens aged 65 or older living in the D metropolitan area, and data collection was conducted by visiting them for interviews in June 2019. A binomial logistic regression analysis was performed to examine the relationship between independent variables (demographic characteristics, health-related behavioral characteristics, health condition variables) and the dependent variable (quality of life) while controlling for gender and age. As a result, the factors related to quality of life for those surveyed were education level, spousal status, living status, bear for living expenses, average monthly allowance, satisfaction with daily life, evaluation of sleep quality, smoking and eating habits, amount of regular exercise, hobbies, subjective health status, physical disability (if any), hearing ability, visual acuity, mastication ability, urinary incontinence (present or not), and amnesia. The above results suggest that quality of life for the elderly living in urban areas is significantly related to variables that indicate demographic characteristics, health-related behavioral characteristics, and health condition.

• Proceedings of the IEEK Conference
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• 2003.07c
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• pp.2871-2874
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• 2003

The development of a portable system to be used by diabetes patients and renal discase patients is needed to monitor their urea concentration and their glucose concentration in blood. This paper reports a compound sensor composed of a urea sensor, a glucose sensor and a micro-channel. This paper also reports the development of a portable measurement system to measure the concentrations, display the values, and save the values to be used by doctors.

• Electronics and Telecommunications Trends
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• v.28 no.2
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• pp.145-154
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• 2013

세계적으로 산업화의 진전에 따른 석유 등 화석연료 사용의 급증과 산림남벌 등으로 대규모 홍수와 가뭄, 폭염, 한파 등의 자연재해가 속출하고 있다. 자연재해, 환경오염 등 재난 재해의 대형화, 집중화, 세계화로 인한 위험을 조기에 발견하고, 피해를 최소화하기 위해 IT 기술을 활용한 재난관리의 필요성이 증대되고 있다. 재난 재해 대응형 IT 기술로는 재난대응 로봇, 재난안전무선통신망, CCTV를 이용한 모니터링 서비스, 모바일을 이용한 예 경보 서비스, 컴퓨팅을 이용한 재난 재해 예측, 사이버 오피스 구축을 통한 재택근무 등이 있으며 국내외에서 활발히 개발 적용되고 있다.

• 전기의세계
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• v.53 no.9
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• pp.43-52
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• 2004

최근 한국사회는 국민소득향상, 생활수준의 개선, 의학기술의 발달 등으로 평균수명이 크게 연장 되어 고령화 사회로 발전되어 가고 있다. 평균수명이 짧았던 시대에는 고령화 문제가 크게 중요시되지 않았으나 수명이 연장됨에 따라 노후에 대한 경제적, 사회적 보호문제 등이 대두되고 있다. 노인들의 기본욕구는 주로 소득 보건 주택 여가 등에 관한 것으로 노후에도 자신의 능력과 적성에 맞는 일자리를 찾아 경제적 안정을 누리며 소득을 유지하고 의료보장으로 건강한 노후를 보낼 수 있으며, 가족관계가 안정이 되고 자기발전을 기하며, 사회참여와 역할을 지속하며, 휴식과 오락을 즐기고 문화를 창출하며 삶의 보람을 찾을 수 있는가 하는 것이 문제이다.(중략)

• 전기의세계
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• v.23 no.4
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• pp.53-59
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• 1974

This paper investigates the theoretical properties of a logic element called the multithreshold threshold element, which is a generalization of the single-threshold threshold element. The primary partition os a systematic method of obtaining the multi-threshold realization of a switching function by the index numbers. The concept of comparable vertices of the same index numbers introduced in this paper is very promising for testing the multi-threshold partition by the initial condition to be defined by the minterms of the same index numbers.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 1998.10a
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• pp.137-148
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• 1998

최근 교육부의 가상대학 설비의지가 표명되면서 각 대학과 소프트웨어개발업자들은 가상대학의 구현에 노력을 기울이고 있다. 외국에서는 명문대학이건 2년제 대학이건 또는 통신대학이건 오래 전부터 원격교육의 형태가 활성화되어 있었으며 최근에는 각종 정보 기술 및 매체를 활용하여 보다 효율적이고 본격적인 가상교육 서비스를 제공하고 있다. 이러한 가상대학의 도래는 오늘날의 정보화사회에서 홈뱅킹, 전자상거래, 재택근무등의 사회현상과 동일한 맥락에서 필연적인 당위성을 내포하고 있다. 따라서 본 연구에서는 가상대학의 구성형태별 특징 및 현황을 조사하고 또한 가상대학 구현을 위한 솔루션 현황을 조사하여 향후 가상대학의 발전 방향에 대한 연구와 가상대학 시스템의 설계를 위한 기본 자료로서 제공하고자 한다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2000.04a
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• pp.679-682
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• 2000

현재 기업은 정보통신과 컴퓨터 기술의 비약적인 발전으로 본사와 지사 사이의 정보의 교환이 중요한 문제로 대두되고 있다. 특히 재택근무에 대한 관심이 높아지고 있으며 이에 대한 방편으로 RAS(Remote Access Server) 및 VPN(Virtual Private Network)에 대한 연구가 활발히 이루어지고 있다. 본 연구에서는 VPN 및 RAS서버의 효율적인 구축 방법을 제시하고자 한다.

• Proceedings of the KGS Conference
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• 2003.05a
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• pp.122-124
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• 2003

오늘날 컴퓨터 통신에 의한 인터넷의 보급은 우리의 생활 전반에 걸쳐 과거에 불가능하였던 많은 일들이 실생활에서 일어나게 하였다. 이를테면 회사에 출근하지 않고도 가정에서 각종 업무를 처리할 수 있는 재택근무, 도서관에 가지 않고도 전자도서관에서 필요한 자료를 얻을 수 있을 뿐만 아니라, 공연 티켓도 가정에서 컴퓨터를 통해서 예매할 수 있고, 물건을 사기 위해서 직접 상점에 가지 않고도 가정과 일터에서 케이블 텔레비전(CATV)을 통한 홈쇼핑1)이나 컴퓨터 통신을 이용한 인터넷 쇼핑이 가능해졌다. 이와 같은 현상은 정보통신기술의 발달로 가능하게 된 것이다. (중략)