• 한국전자파학회논문지
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• 제14권6호
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• pp.616-624
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• 2003

상수도 누수로 인한 우리나라 수자원의 고갈 때문에 효율적으로 누수를 탐지할 수 있는 방법이 시급하다. 본 논문에서는 지하탐사 레이더(GPR) 기법을 이용하여 누수지점을 탐사하였다. 메탄올이 채워진 아크릴 상자로 누수가 일어난 영역을 구현한 후, 본 실험실에 구축된 GPR 시스템을 사용하여 scale-down 실험을 수행하였다. 본 GPR실험의 타당성은 측정결과가 동일한 상황에서의 FDTD 계산 결과와 거의 일치함을 보임으로써 확인하였다. 누수 분포에 따른 B-scan 영상들을 제시함으로써 GPR 시스템의 누수탐지 가능성을 살펴보았다.

• 한국보건간호학회지
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• 제28권1호
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• pp.127-137
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• 2014

Purpose: The purpose of this study was to investigate differences in suicidal ideation according to general characteristics, and to identify the associated factors of suicidal ideation in rural elderly. Method: We surveyed 168 elderly people using structured questionnaires from March through April, 2013. Data analy was performed using descriptive statistics, ${\chi}^2$ test, Fisher's Exact test, and multiple regression using the SPSS program. Results: Significantly differences in suicidal ideation score were observed according to drinking state(p=.036), sleep state(p=.013), health state(p=.020), and stress state(p=.049). The associated factors identified in this study significantly explained 13.2% of suicidal ideation. Smoking and sleep state were the most significant factors of suicidal ideation. Conclusion: Based on these results, development of programs for promotion of psychological health in order to reduce suicide rates of the elderly is urgent. In particular when focusing on relations between sleep disturbance and suicide, it is considered that nursing intervention will be required to promote quality of sleep in clinical practices and communities.

• 한국항해항만학회지
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• 제34권7호
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• pp.533-538
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• 2010

English is the accepted common working language of the maritime world and being competent in its use is essential to the safety of ships, their crews and the marine environment. This paper is a response to the urgent need to find a suitable solution to the problem of providing maritime students with quality instruction in Maritime English. This paper will show what type of English instructor is best suited to help cadets have at least a basic grasp of Maritime English communication, with a view to possessing the level required by STCW 95 within the shortest time. It presents ways that maritime institutes can develop their own qualified or 'marinated' English Instructors and what qualifications should be required. It is concluded that by further essential research, interviews and questionnaires etc., the language needs of the university and shipping industry in Korea as a whole can be clearly verified. By examining such data, the present language education systems can be evaluated as to efficacy and relevance, allowing the establishment and implementation of 'best practice' within the training institute. This will result in making excellent informed decisions and choices about how best to improve the language competencies of graduating cadets, thereby creating the catalyst for the success of future seafarers whilst raising the image of the institute and Korean shipping worldwide.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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• pp.632-635
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• 2009

Nowadays renewable energy has undergone major development, however most renewable energy resources still have demerit which is under the influence of environmental factors that can not be set up the power plants or can not be generated the rated power. To wander from the point of environmental instability, the present paper looks at the tidal current energy which can supply regular electric power. It has an important merit which is more predictable than others, however the place which can be set up is limited and the turbine system must be optimized. The development of the optimized rotor blades design is urgent to obtain regular electric power using the tidal current energy. Therefore, the paper expands on this idea and presents a conceptual design of 100kW horizontal axis rotor blade for the tidal current turbine using blade element momentum (BEM) analysis. The compatibility of horizontal axis tidal turbine (HATT) is verified using a commercial computational fluid dynamics (CFD) code, ANSYS-CFX. This paper presents results of the numerical analysis, such as pressure, streak line and the performance curves with torque data for the inflow of the horizontal axis tidal current turbine (HATT).

• 유통과학연구
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• 제17권6호
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• pp.43-56
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• 2019

Purpose - With the increasing number of small business owners who reports the cessation of their businesses, the rate of closing the business within the year is increasing as well. The efforts have been made continuously to revitalize the business through the inflow of government or private capital. Maintaining the fast-changing commercial districts with the existing support is difficult, so it is urgent state that needs for commercial district reorganization. The differentiate aspect is that this new measures for small-block-unit commercial modeling can be introduced to promote these aging/deposit private-owned shops politically. Research design, data, and methodology - This study is to develop a sustainable theme shopping rehabilitation method which considers the characteristics of local cities based on the case studies of developed countries' commercial areas to revitalize the central urban areas of local cities. Results - The purpose of this study as stated above is to manage the local commercial area through the program that purchases the empty stores, and the measure to secure the autonomy among stores. Conclusions - The government should concentrate on projects such as vacant store purchase programs, which are omitted from past achievements, and maximize the effect of the project through inter-departmental project packages.

• 여성건강간호학회지
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• 제17권3호
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• pp.294-303
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• 2011

Purpose: This study aimed to describe bladder dysfunction in elderly women such as frequency, nocturia, and residual urine. Methods: One hundred elderly women aged 60 and over. The Bristol Female Lower Urinary Symptoms (BFLUT) was used to evaluate the bladder function and to measure the residual urine amount by using a bladder scanner. Data was analyzed with the differences between voiding dysfunction by age group and life habits by t-test, ANOVA and correlation by Pearson correlation coefficient. Results: the mean daytime frequency was 6.8 times and night-time frequency 2.7 times. Sixty three percent of subjects had urgency and 41% had urgent incontinence. Over half of subjects had problem in voiding function. There were significant differences in frequency by age groups and constipation, but not in daytime frequency and residual urine. Lastly, there were significant positive relations between daytime frequency and night-time frequency. Also results indicate that more frequency in daytime equaled to a less residual urine amount. Conclusion: We know many elderly women have lower urinary tract symptoms. Specially women over 75 years have more daytime frequency and night-time frequency. This suggests further research needed in order to understand the relation of voiding patterns and life habits and its influence on quality of life.

• 한국안광학회지
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• 제15권4호
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• pp.307-312
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• 2010

목적: 본 논문에서는 군의 안경 보급체계 문제점을 조사하여 개선방안을 제시하는데 있다. 방법: 한국군과 미군의 안경보급체계를 중심으로 시력검사, 안경테 보급절차 등의 현황을 조사하여 비교하였다. 결과: 한국군의 시력 DB의 내용, 구축방법, 활용방안들을 다루었다. 그리고 안경을 빠르게 배송하고 장병의 만족도를 높이는 여러 가지 방안을 제안하였다. 결론: 한국군은 장병들에게 질높은 시력서비스를 제공하기 위해서는 시력DB를 구축해야 한다. 시력관리와 서비스를 전담하는 부서를 만드는 것이 시급하다. 그리고 안경의 조달방법도 개선해야만 한다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume II
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• pp.868-871
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• 2006

Mortality of domestic people from cardiovascular disease ranked second, which followed that of from cancer last year. Therefore, it is very important and urgent to enhance the reliability of medical examination and treatment for cardiovascular disease. Heart Rate Variability (HRV) is the most commonly used noninvasive methods to evaluate autonomic regulation of heart rate and conditions of a human heart. In this paper, our aim is to extract a quantitative measure for HRV to enhance the reliability of medical examination for cardiovascular disease, and then develop a prediction method for extracting multi-parametric features by analyzing HRV from ECG. In this study, we propose a hybrid Bayesian classifier called FP-based Bayesian. The proposed classifier use frequent patterns for building Bayesian model. Since the volume of patterns produced can be large, we offer a rule cohesion measure that allows a strong push of pruning patterns in the pattern-generating process. We conduct an experiment for the FP-based Bayesian classifier, which utilizes multiple rules and pruning, and biased confidence (or cohesion measure) and dataset consisting of 670 participants distributed into two groups, namely normal and patients with coronary artery disease.

• 한국응급구조학회지
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• 제15권1호
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• pp.25-35
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• 2011

Purpose & Method : This purpose of this paper was to show the importance of paramedics. The trauma patients receiving a temporary treatment from emergency medical technician filled out a self-administered questionnaire. The questionnaire consisted of the satisfaction for EMS. The data collection was from October 23 to November 12, 2006. The patients were in the Kyeonggi province hospital having more than 500 beds. At the time of discharge, the questionnaire forms were distributed. Results : Males showed higher satisfaction than females when they had a paramedics, and this indicated statistically significant difference(p<.05). The groups showing higher satisfaction for EMT 1 practice included patients over 40 years old, educated under high school, and income over 2 million won. Before the trauma patients were treated, they were satisfied with short waiting time less than 10 minutes. They showed higher satisfaction within 2 hours duration. Conclusion : Summing up the above result, it was found that the group treated by an emergency medical technician showed higher satisfaction than the group not treated by an emergency medical technician. Therefore, it is necessary to arrange paramedics in emergency medical centers to improve satisfaction with emergency medical services. And since it is a crucial factor that affects patient's satisfaction significantly, it is urgent to increase the roles of emergency medical technicians and lay the foundation for legal institutions.

• 대한전자공학회논문지SP
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• 제41권6호
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• pp.1-7
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• 2004

디지털 미디어와 통신 네트워크의 급속한 발전으로 적절한 지적소유권(IPR) 보호 기술인 데이터 인증방법에 대한 필요성이 절실히 요구되고 있다. 본 논문에서는 정보량이 많은 워터마크를 삽입하여도 워터마크가 삽입된 영상의 화질을 열화시키지 않고, 특히 영상의 일부가 제거되는 공격에서 강인성을 갖기 위해, 제안한 선형비트확장(LBX) 인터리빙을 이용하여 마킹 공간인 이산 웨이브렛 변환(DWT)영역의 자주파수 계수에 그레이스케일 워터마크 로고를 삽입하는 새로운 영상 워터마킹 기술을 제안하였다. 실험결과 영상절단과 영상회전 등과 같은 영상의 일부가 제거되는 공격에 대해서 특히 높은 강인성을 가짐을 검증하였다.