• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2002년도 봄 학술발표회 논문집
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• pp.335-340
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• 2002

By the recently, Environmental pollution is serious by the highly economic growth and expansion of lively country basic industry. Especially, in case of industrial waste and life waste leaped into a pollution source. Also, research for processing of waste and recycling countermeasure is a pressing question on national dimension because it is prohibited an ocean disposal and reclamation. In this study, it looked for fracture characteristic value of recycling a coal ash to decrease environmental pollution by picky and exhaustion of natural resources and to reduce self-weight to prepare for a tall building and earthquake. So a coal ash examined to be possible to do as construction material. It achieved compressive strength test and three points bending test with initial notch depth rate and age for variables to show a basic research data. From the basis of the three points bending test, the fracture parameters - notch sensitivity, fracture energy, initial compliance were experimentally proposed. From the results of the compressive strength test, the elastic modulus was experimentally proposed. Also on the basis of the three points bending test, the fracture parameters - notch sensitivity, fracture energy, initial compliance were experimentally proposed. The results that the strength and fracture energy value are lower than concrete or mortar is described in this paper. Also, it shows that the deflection at fracture decreases as the age increases and the notch sensitivity decrease. However, it is judged to be available to construction material if research is continuously gone forward.

• 보건교육건강증진학회지
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• 제28권5호
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• pp.83-95
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• 2011

Objectives: This study was conducted to examine the immunization, knowledge, and preventive health behaviors for hepatitis A in college students. Methods: Structured questionnaire survey data were collected from a convenient sample of 266 students at two universities in urban areas. Data were analyzed with Pearson correlation coefficient, t-test, ANOVA, and multiple logistic regression analysis. Results: Only 10.5 percent of the students reported having had hepatitis A vaccination. The levels of knowledge and compliance of preventive health behavior were moderate with the mean scores of 15.56(${\pm}2.12$), and 26.78(${\pm}3.41$), respectively. A significant correlation was found between knowledge and preventive health behaviors. The compliance to preventive health behaviors differed by education on hepatitis A in the past. Conclusions: Vaccination rate of hepatitis A found to be low and the knowledge and health behaviors for hepatitis A prevention among university students are limited. Provision of vaccination, education and strategies to enhance preventive health behaviors are warranted to prevent hepatitis A.

• 디지털융복합연구
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• 제11권3호
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• pp.279-284
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• 2013

IT 기술에 의료기술이 접목되면서 유헬스케어 서비스에 적용한 체내삽입장치는 환자의 민감한 생체정보를 제3자에게 쉽게 유출되어 환자의 프라이버시 침해되지 않도록 무선 액세스 네트워크 구간에 높은 데이터율과 이동성을 지원하는 강한 보안이 필요하다. 본 논문에서는 이동성을 가지는 환자가 체내삽입장치내 환자의 생체정보를 무선 액세스 네트워크 구간에서 제3자에게 불법적으로 노출되지 않도록 무선 액세스 네트워크에 WiMAX 네트워크을 구축하여 이동 환자의 생체정보가 안전하게 송 수신될 수 있도록 테스트 베드를 구축하여 WiMAX 네트워크의 보안 성능 측정 및 평가를 수행한다. 특히, 본 논문에서는 WiMAX 보안 compliance, WiMAX MAC 상의 IPSec, MAC 계층에서 ECDH 수행 등에서 데이터 보안, MAC 제어 메시지 보안, 핸드오버 연결 지연, 프레임 손실 및 대역폭 등을 비교평가한다.

• 한국지역사회생활과학회지
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• 제22권3호
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• pp.445-454
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• 2011

This study was performed on 5 prehypertensive male participants to investigate the effects of the clothing program for improving the vascular compliance on heat tolerance. The clothing program means the alternate stimulation of the temperature using clothes. The participants wore two different garments with $1.5^{\circ}C$ difference in the temperature inside clothing in a climatic chamber ($18.8{\pm}0.2^{\circ}C$, $38{\pm}3%RH$) alternately for 4 weeks. Heat tolerance tests were conducted in the climatic chamber of $35.2{\pm}0.5^{\circ}C$, $54{\pm}3%RH$ before and after the clothing program. The results were as follows. The $\overline{T}$sk, Tr and heart rate were lower in the post test than in the pre test (p<.01). The whole body and local sweat rates as well as systolic and diastolic blood pressures had reduced the tendencies in the post test. Participants felt less wet and more comfortable in the post test than in the pre test(p<.01). These results showed that the clothing program through the alternate stimulation of the temperature positively affected the improvement of heat tolerance.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 B
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• pp.793-796
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• 1996

This study proposes a new algorithm which performs a production simulation under various constraints and maintains computational efficiency. In order to consider the environmental and operational constraints, the proposed algorithm is based on optimization techniques formulated in LP form In the algorithm, "system characteristic constraints" reflect the system characteristics such as LDC shape, unit loading order and forced outage rate. By using the concept of Energy Invariance Property and two operational rules i.e. Compliance Rule for Emission Constraint, Compliance Rule for Limited Energy of Individual Unit, the number of system characteristic constraints is appreciably reduced. As a solution method of the optimization problem, the author uses Karmarkar's method which performs effectively in solving large scale LP problem. The efficiency of production simulation is meaningful when it is effectively used in power system planning. With the proposed production simulation algorithm, an optimal expansion planning model which can cope with operational constraints, environmental restriction, and various uncertainties is developed. This expansion planning model is applied to the long range planning schemes by WASP, and determines an optimal expansion scheme which considers the effect of supply interruption, load forecasting errors, multistates of unit operation, plural limited energy plants etc.

• 한국IT서비스학회지
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• 제11권1호
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• pp.1-14
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• 2012

The Web accessibility compliance rate of public organizations and private enterprises is still low due to the lack of awareness of Web accessibility by website developers and managers in spite of the fact that web accessibility compliance became mandatory in 2008. Web developers and managers think the website visual quality might be compromised or the website requires more development time and budget in order to comply with the web accessibility guidelines. Therefore, this paper has analyzed whether developers with various training in web accessibility or experience on website development have different perception on time, cost and design issues for developing accessible websites. For this purpose, 72 Web developers with hand-on experience working for website development companies in Korea were sent to the questionaries. The results have indicated that the group of developers with many hours of training in web accessibility and rich experience on website development perceives that they can develop accessible website without additional cost and time or compromising design quality. The contributions of this paper are following： (1) proving the widely recognized perception on budget, time, and design for developing accessible website is incorrect and (2) motivating further research on this subject in the future.

• Journal of Korean Neurosurgical Society
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• 제64권4호
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• pp.486-494
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• 2021

The growth of pulsed electromagnetic field (PEMF) therapy and its progress over the years for use in post-operative bone growth has been revolutionary in its effect on bone tissue proliferation and vascular flow. However, further progress in PEMF therapy has been difficult due to lack of more evidence-based understanding of its mechanism of action. Our objective was to review the current understanding of bone growth physiology, the mechanism of PEMF therapy action along with its application in spinal surgery and associated outcomes. The authors of this review examined multiple controlled, comparative, and cohort studies to compare fusion rates of patients undergoing PEMF stimulation. Examining spinal fusion rates, a rounded comparison of post-fusion outcomes with and without bone stimulator was performed. Results showed that postoperative spinal surgery PEMF stimulation had higher rates of fusion than control groups. Though PEMF therapy was proven more effective, multiple factors contributed to difficulty in patient compliance for use. Extended timeframe of treatment and cost of treatment were the main obstacles to full compliance. This review showed that PEMF therapy presented an increased rate of recovery in patients, supporting the use of these devices as an effective post-surgical aid. Given the recent advances in the development of PEMF devices, affordability and access will be much easier suited to the patient population, allowing for more readily available treatment options.

• 동서간호학연구지
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• 제28권2호
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• pp.132-141
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• 2022

Purpose: This study aimed to investigate intensive care unit (ICU) nurses' actual and perceived glove uses for preventing healthcare associated infection. Methods: We observed nurses' donning glove by occasions and adherence to guideline for glove uses in four ICU in a single hospital. Total of 378 cases were observed from August 16 through October 6, 2020. Sixty one nurses of 66 nurses observed responded to a self-reported questionnaire about perceived glove use and knowledge of glove use. Data analysis was performed using descriptive statistics. Results: The number of observed episodes for glove use was 277. Although the highest numbers of occasions of wearing gloves was contact precaution, the compliance rate was 72.1%. The rates of donning gloves were low in the insertion and removal of peripheral venous catheters, blood glucose testing and blood sampling, which were at risk for exposure to blood. We observed misuse of wearing gloves even when they were not required. Results showed that the majority of non-compliance with glove use were a failure of performing hand hygiene before and after glove use and a failure of changing gloves between procedures on the same patient. The participant's knowledge of glove use was high. Conclusion: Based on the results, it is necessary to provide ICU nurses with education and reinforcement of proper glove uses for infection control.

• 한국융합학회논문지
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• 제11권6호
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• pp.37-42
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• 2020

공공정보화분야 유지관리 사업에서 개인정보의 고의 또는 관리 부재로 인한 유출 및 파괴, 변조 등 외부 불법사용자의 공격이 증가되고 있다. 이러한 보안 사고를 사전에 예방하고자 SLA 지표를 개발하여 정량적으로 관리하는 것이 필요하다. 본 연구는 개인정보보호 SLA 지표를 개발하여 개인정보보호 SLA 지표 정보수집 방법, 시기 등의 구체적인 안을 제시하였다. 특히, 전문가 그룹을 중심으로 온라인 설문조사를 실시한 결과 개인정보 파기 준수율, 개인정보보호 시스템 접근통제 준수율의 경우 그 중요성과 타당성 측면에서 실제 공공정보화 사업에 SLA 신규 및 개정 시 적용하여 관리하는 것이 효과가 클 것이라는 의견을 받았다. 향후, 이러한 개인정보보호를 위한 SLA 지표를 공공정보화 유지관리에 기준으로 활용함으로서 SW품질을 높이고 안전성 확보에 기여할 것이다.

• Asian Pacific Journal of Cancer Prevention
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• 제13권5호
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• pp.1761-1766
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• 2012

Background: The appropriate interval between negative colonoscopy screenings is uncertain, but the numbers of advanced neoplasms 10 years after a negative result are generally low. We aimed to evaluate the cost-effectiveness of colorectal neoplasm screening and management based on repeat screening colonoscopy every 10 years or single colonoscopy, compared with no screening in the general population. Methods and materials: A state-transition Markov model simulated 100,000 individuals aged 50-80 years accepting repeat screening colonoscopy every 10 years or single colonoscopy, offered to every subject. Colorectal adenomas found during colonoscopy were removed by polypectomy, and the subjects were followed with surveillance every three years. For subjects with a normal result, colonoscopy was resumed within ten years in the repeat screening strategy. In single screening strategy, screening process was terminated. Direct costs such as screening tests, cancer treatment and costs of complications were included. Indirect costs were excluded from the model. The incremental cost-effectiveness ratio was used to evaluate the cost-effectiveness of the different screening strategies. Results: Assuming a first-time compliance rate of 90%, repeat screening colonoscopy and single colonoscopy can reduce the incidence of colorectal cancer by 65.8% and 67.2% respectively. The incremental cost-effectiveness ratio for single colonoscopy (49 Renminbi Yuan [RMB]) was much lower than that for repeat screening colonoscopy (474 RMB). Single colonoscopy was a more cost-effective strategy, which was not sensitive to the compliance rate of colonoscopy and the cost of advanced colorectal cancer. Conclusion: Single colonoscopy is suggested to be the more cost-effective strategy for screening and management of colorectal neoplasms and may be recommended in China clinical practice.