• 가정간호학회지
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• 제14권1호
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• pp.18-22
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• 2007

Purpose: The rapid change to an aging society generates an increase in the incidence of chronic diseases. Many chronic patients have been facing their illnesses without enough preparation. In order to solve these problems, we designed and tested a public healthcare service based on ubiquitous technology. Method: Telemedicine has emerged as new medical care system of chronic disease. However, public potential of its technology is difficult to know under current traditional health care system. In this work, we developed a Personal Digital Access (PDA) phone based healthcare system by trained visiting nurses for elderly patients. A field test was performed by SeongBuk Public Health Center in Seoul, Republic of Korea (ROK). Result: Surveys were generated to assess the effects of this system compared to conventional public health system. Findings of trials demonstrate that healthcare coordination enhanced by PDA phone technology is satisfactory to the patients and nurses compared to previous one because prompt responses arouse their recognition of health. Conclusion: Ubiquitous healthcare system applied to public health service proved to be efficient and time-saving to monitor and control the chronic illnesses of large population.

• 한국압력기기공학회 논문집
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• 제17권1호
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• pp.36-48
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• 2021

As the material aging of nuclear power plants has been progressing in domestic and overseas, crack growth becomes one of the most important issues. In this respect, the crack growth assessment has been considered an essential part of structural integrity. The crack growth assessment for nuclear power plants has been generally performed based on ASME B&PV Code, Sec. XI but the idealization of crack shape and the conservative solutions of stress intensity factor (SIF) are used. Although finite element analysis (FEA) based on iterative crack growth analysis is considered as an alternative method to simulate crack growth, there are yet no guidelines to model the crack-tip spider-web mesh for such analysis. In this study, effects of various meshing factors on FE SIF calculation are systematically examined. Based on FEA results, proper criteria for spider-web mesh in crack-tip are suggested. The validation of SIF calculation method through mapping initial stress field is investigated to consider initial residual stress on crack growth. The iterative crack-tip modeling program to simulate crack growth is developed using the proposed criteria for spider-web mesh design. The SIF results from the developed program are validated by comparing with those from technical reports of other institutes.

• 한국전자통신학회논문지
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• 제18권2호
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• pp.355-360
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• 2023

화재는 인명피해와 재산피해로 많은 이들에게 되돌릴 수 없는 상처를 남기는 재난이다. 이를 신속히 감지하고, 대처하고자 다양한 화재탐지 장비가 우리의 주변에 설치되어 있다. 그러나 인위적, 환경적, 노후화 등 다양한 문제로 인해 실제 화재가 아님에도 화재탐지 장비가 작동되어 정작 필요한 화재 현장에의 지원이 늦어지는 등 많은 문제가 발생하고 있다. 본 논문에서는 화재탐지 장비의 비화재보에 대해 분석하고 화재 여부를 확인하여 오보로 인한 출동을 방지하려는 방법으로 현장직원이 영상을 통해 현장 상황을 확인 후 출동할 수 있는 시스템에 대하여 제안한다. 이러한 확인절차를 거쳐 실제 화재로 판명될 시 기존 비상 재난 안내 문자와 같은 광범위한 안내가 아닌, 화재 발생 인근 지역의 범위에 대피 안내 알림을 보내 신속한 대피를 유도하고, 소방관의 신속한 출동으로 빠르고 정확한 처리가 가능하도록 지원하는 맞춤형 자동안내 시스템을 제안함으로써 재난에 대해 안정적으로 대처할 수 있게 함을 목적으로 한다.

• 대한토목학회논문집
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• 제28권1D호
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• pp.29-34
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• 2008

최근 급속한 고령화로 인하여 꾸준히 증가하는 고령인구의 사회활동과 경제활동을 보장해주기 위한 교통산업의 필요성이 점차 증대되어지고 있다. 그 중에서도 고령인구의 이동권을 보장해주기 위한 많은 정책들이 시행되어 지고 있으며, 최근 2003년부터 서울시를 중심으로 교통약자를 위해 승 하차시 계단을 없앤 저상버스의 도입이 본격화되고 있다. 본 연구에서는 이러한 저상버스의 도입으로 인하여 발생되어지는 효과를 버스운행시간에 많은 영향을 주는 승차시간에 대하여 조사를 실시하였다. 그 결과 전체 연령의 승차시간은 1인당 평균 0.8초의 단축 효과가 있었으며, 특히 노인층의 경우 1.1초인 약 36%의 시간이 단축되어 지는 것으로 조사되었다. 이러한 시간 감축은 버스운행시간 단축으로 이어져 운영비용의 절감을 기대할 수 있다.

• 인간식물환경학회지
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• 제22권6호
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• pp.699-709
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• 2019

Various health and social issues related to the elderly are emerging in line with the rapid aging of the population. In particular, dementia currently has a prevalence of about 10 percent of the elderly population in South Korea, which increases financial and social burdens to not only individual patients but also their caring family. To assess the effects of participating in the forest therapy programs for dementia prevention, this study recruited participants aged 50 and above and tested their depression (Korean form of Geriatric Depression Scale; KGDS) and stress response (Modified form of Stress Response Inventory; SRI-MF), which are emotional aspects of dementia. As a result, KGDS showed a significant decrease of 3.2 points from 8.4 to 5.2 points, and SRI-MF showed a significant decrease of 7.2 points from 40 to 32.8 points, indicating a statistically significant improvement in both. In addition, participants with minor depression and high level of stress in the pretest showed statistically significant improvements in the SRI-MF for men, and the KGDS and SRI-MF for women. Furthermore, there were statistically significant improvements in KGDS for participants in their 60s and in SRI-MF for those in their 70s in terms of age, and in both KGDS and SRI-MF for participants with chronic diseases and in KGDS for participants without chronic diseases. This study confirmed the effects of forest therapy on the prevention of the emotional aspects of dementia and laid the groundwork for increasing the applicability of forest therapy by obtaining a place for dementia prevention as a field of forest therapy.

• The Korean Journal of Pain
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• 제37권1호
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• pp.51-58
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• 2024

Background: The rise in national health care costs has emerged as a global problem given the ever-aging population and rapid development of medical technology. The utilization of interventional pain management has, similarly, shown a continued rise worldwide. This study evaluates the differences in the medical costs in the field of interventional pain treatment (IPT) between two countries: Korea and Japan. Methods: Korean medical insurance costs for 2019 related to pain management focused on IPT were compared to those of Japan. Purchasing power parity (PPP) was used to adjust the exchange rate differences and to compare prices in consideration of the respective societies' economic power. Results: The cost of trigger point injections in Japan was 1.06 times higher than that of Korea, whereas the perineural and intraarticular injection prices were lower in Japan. The cost of epidural blocks was higher in Japan compared to Korea in both cervical/thoracic and lumbar regions. As for blocks of peripheral branches of spinal nerves, the cost of scapular nerve blocks in Japan was lower than that in Korea, given a PPP ratio 0.09. For nerve blocks in which fluoroscopy guidance is mandatory, the costs of epidurography in Japan were greater than those in Korea, given a PPP ratio 1.04. Conclusions: This is the first comparative study focusing on the medical costs related to IPT between Korea and Japan, which reveals that the costs differed along various categories. Further comparisons reflecting more diverse countries and socio-economic aspects will be required.

• 문화기술의 융합
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• 제10권2호
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• pp.531-536
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• 2024

최근 농업분야의 스마트 농기계로 분류되고 있는 방제드론은 농촌지역의 고령화 시대를 맞이하여 작업 시간 단축과 방제효과를 높이기 위해 하드웨어 및 소프트웨어를 결합하여 스마트 방제 및 자동방제 시스템 구축을 위해 노력하고 있다. 본 논문에서는 관리관제 및 자동방제 시스템 구축을 위한 기초연구로 방제드론 전용노즐의 특성을 분석하였다. 다양한 드론 모델의 종류, 방제사, 바람, 비행속도, 비행고도, 날씨 조건, UAV 농약 종류 등 다양한 변수를 고려하기 위해서는 노즐의 특성파악과 범용성을 고려하여 약제살포 기준 제시가 가능한 관련 연구가 필요하다. 따라서 다양한 변수 고려가 가능하도록 자체 설계노즐을 기반으로 유동해석(CFD) 시뮬레이션을 실시하고 감수지 실험을 통하여 액적분포의 이론값과 실험값을 비교 분석하였다. 추후 드론운용에 따른 다양한 변수를 고려하여 정확한 비산을 산출하고 관리관제 및 자동방제 시스템에 활용하고자 한다.

• 문화기술의 융합
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• 제10권3호
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• pp.845-849
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• 2024

현재 도시철도 레일의 노후화로 인한 레일표면결함이 증가하고 있으나 국가에서 제정된 궤도성능평가에 관한 세부지침에서 레일표면손상을 기술자의 육안, 간단한 측정 도구로 점검을 수행하는 실정이다. 주기적인 선로순회작업 및 육안점검을 통해 레일표면의 결함을 발견하는 것은 매우 중요하다. 그러나 점검자의 주관적 판단에 의해 레일표면의 결함의 경중을 평가하는 것은 레일 내부의 손상을 예측하기에 상당한 제약이 따른다. 본 연구에서는 레일표면손상에 따른 레일내부 균열특성에 관한 연구로서 현장측정에서는 레일표면 손상개소를 선정하여 가속구간 및 제동구간의 노후레일 시료를 채취하여 레일표면손상 상태를 평가하고자 전자주사현미경(SEM)을 이용하여 균열특성을 분석하였다. 분석결과, 주행 중인 열차로 인해 발생하는 균열 메커니즘과 레일표면방향으로 올라오는 각도로 균열이 발생하는 가속구간의 균열특성을 실험적으로 입증하였다.

• 드라이브 ㆍ 컨트롤
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• 제21권2호
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• pp.53-64
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• 2024

Global population growth has resulted in an increased demand for food production. Simultaneously, aging rural communities have led to a decrease in the workforce, thereby increasing the demand for automation in agriculture. Drones are particularly useful for unmanned pest control fields. However, the current method of uniform spraying leads to environmental damage due to overuse of pesticides and drift by wind. To address this issue, it is necessary to enhance spraying performance through precise performance evaluation. Therefore, as a foundational study aimed at optimizing drone-based pest control technologies, this research evaluated water-sensitive paper (WSP) via density map estimation using convolutional neural networks (CNN) with a encoder-decoder structure. To achieve more accurate estimation, this study implemented multi-task learning, incorporating an additional classifier for image segmentation alongside the density map estimation classifier. The proposed model in this study resulted in a R-squared (R²) of 0.976 for coverage area in the evaluation data set, demonstrating satisfactory performance in evaluating WSP at various density levels. Further research is needed to improve the accuracy of spray result estimations and develop a real-time assessment technology in the field.

• 한국BIM학회 논문집
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• 제13권4호
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• pp.96-105
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• 2023

This study focuses on developing a building object recognition technology for efficient use in the remodeling of buildings constructed without drawings. In the era of the 4th industrial revolution, smart technologies are being developed. This research contributes to the architectural field by introducing a deep learning-based method for automatic object classification and recognition, utilizing point cloud data. We use a TD3D network with voxels, optimizing its performance through adjustments in voxel size and number of blocks. This technology enables the classification of building objects such as walls, floors, and roofs from 3D scanning data, labeling them in polygonal forms to minimize boundary ambiguities. However, challenges in object boundary classifications were observed. The model facilitates the automatic classification of non-building objects, thereby reducing manual effort in data matching processes. It also distinguishes between elements to be demolished or retained during remodeling. The study minimized data set loss space by labeling using the extremities of the x, y, and z coordinates. The research aims to enhance the efficiency of building object classification and improve the quality of architectural plans by reducing manpower and time during remodeling. The study aligns with its goal of developing an efficient classification technology. Future work can extend to creating classified objects using parametric tools with polygon-labeled datasets, offering meaningful numerical analysis for remodeling processes. Continued research in this direction is anticipated to significantly advance the efficiency of building remodeling techniques.