• Journal of the Korean Institute of Gas
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• v.25 no.3
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• pp.53-58
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• 2021

The number of patients with cardiovascular diseases who experience an out-of-hospital cardiac arrest (OHCA) are increasing among young adults as well as the aged population. An automated external defibrillator (AED) is vital in improving survival rates of OHCA victims. Survival rates of OHCA were shown to decline exponentially in time to defibrillation, yet studies in Korea are uncommon that captures the properties of their survival rates in examining optimal locations of AEDs. In this study, we worked on the maximal gradual coverage location problem (MGCLP) with exponential decay coverage function to decide on their optimal locations. The exponential decay coverage function mitigates the drawback of over-estimating survival rates of OHCA patients. It is expected that a more sophisticated facility location problem will be developed to identify the "emergent" characteristics of pedestrians who responds to the OHCA occurrence by incorporating random pedestrian locations and movement through simulation.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.22 no.4
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• pp.165-170
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• 2022

By reducing time spent outside, a shopping system was developed for middle-aged and elderly people who mainly use neighborhood marts and neighborhood mart managers. The main functions of this app are direct shopping and online shopping, and it was developed using QR code using Zxing library on Android and Kakao Map using Kakao API. In addition, it provides information such as payment statistics and bulletin board posts that members need through recycler view and graphs in an easy-to-read manner. Through this system, members can efficiently manage by reducing fatigue when using the mart through direct purchase using QR code and delivery through map, and reducing manpower wastage as a mart manager. Also, as a mart manager, more consumers will be able to sell more items.

• The Journal of the Convergence on Culture Technology
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• v.8 no.6
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• pp.155-159
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• 2022

After artificial intelligence was trained with the data on the concentration of essential mineral elements in hair, the age was predicted by the concentration of mineral elements in the hair of the subject, and the result was compared with the actual age of the subject, and the correlation was investigated. The total number of hair data was 296, of which 2/3 were used for AI learning and 1/3 was used as the subject data. There was a correlation of 0. 678 between the actual age of the young subjects under the age of 25 and the age predicted by the AI. There was almost no correlation in the middle-aged subjects group, and there was a weak correlation of 0.522 in the elderly subject group. In order to secure the usefulness of artificial intelligence using hair mineral element concentration data, it is necessary to provide a larger number of data to the artificial intelligence.

• Land and Housing Review
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• v.13 no.1
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• pp.1-9
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• 2022

In 1991, the United Nations World Tourism Organization (UNWTO) declared "tourism accessible for all" recommending the practice of the right to enjoy tourism. According to the Ministry of Health and Welfare of Korea (2019), the disabled, who are the most vulnerable in tourism, accounted for 5.1% of the total population, and the number of the elderly over 65 is expected to increase to 20.3% by 2025. In particular, the need for customized policies has been raised as the proportion of disabled people among the elderly aged 65 and over continues to increase. Thus, this study identified the spatial characteristics of Universal Design (UD) tourist destinations considering the tourism vulnerable groups. Administrative units (425 dongs) in Seoul were used as spatial units for analysis. As a research method, first, a spatial model was specified through LM verification, and then spatial regression analysis was performed. As a result of the analysis, the spatial characteristics of UD tourist destinations were found to have positive (+) effects on the number of universally certified businesses, the number of restaurants, and the number of bus stops that were available to the vulnerable. It was confirmed that there are a large number of universal certified businesses, restaurants, and bus stops in dongs with UD tourist destinations. The findings will provide policy implications when promoting the right to enjoy tourism in the future and improving Korean universal design quality.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.10 no.2
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• pp.119-126
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• 2016

This study aimed to analyze the effects of psychological-social factors, economic factors and Health-related factors of industrially injured workers on life satisfaction. For this study, the data of the 2014 1st Korea Panel Study of work's compensation Insurance. From all the subjects study, 2000 industrially injured workers who were fit for the study purpose were chosen and analysis were implemented. Self efficacy, self esteem, old age preparations of psychological-social factors influenced on life satisfaction. Economic activity, socioeconomic status of economic factors influenced on life satisfaction. Subjective health status, with the help of others of Health-related factors influenced on life satisfaction. The model explained 34% of the valuables.

• Journal of the Ergonomics Society of Korea
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• v.28 no.2
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• pp.27-34
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• 2009

The purpose of this study was to evaluate aging (young and old), gender (male and female), and handle shape effects on grip force, finger force, and subjective comfort. Four handle shapes of A, D, I, and V were implemented by a multi-finger force measurement (MFFM) system which was developed to measure every finger force with different grip spans. Forty young (20 males and 20 females) and forty old (20 males and 20 females) subjects participated in twelve gripping tasks and rated their comfort for all handles using a 5-point scale. Grip forces were calculating by summation of all four forces of the index, middle, ring and little fingers. Results showed that young males (283.2N) had larger gripping force than old males (235.6N), while young females (151.4N) had lower force than old females (153.6N). Young subjects exerted the largest gripping force with D-shape due to large contribution of the index and middle fingers and the smallest with A-shape; however, old subjects exerted the largest with I-shape and the smallest with V-shape due to small contribution of the ring and little fingers. As expected, the middle finger had the largest finger force and the little finger had the smallest. The fraction of contribution of index and ring fingers to grip force differed among age groups. Interestingly, young subjects provided larger index finger force than ring finger force, whereas old subjects showed that larger ring finger forces than index finger force in the griping tasks. In the relationship between performance and subjective comfort, I-shape exerting the largest grip force had less comfort than D-shape producing the second largest grip force. The findings of this study can provide guidelines on designing hand tool handle to obtain better performance as well as users' comfort.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.508-508
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• 2016

하천은 지형학적으로 청?장년기에 상 중 하류부가 구별되고 유량과 하상경사의 곱으로 표현되는 유수력(stream power)에 따른 반응으로서 구간별 수리 및 하도특성이 형성된다. 산지가 국토면적의 약 70%를 차지하고 노년기 지형인 유역을 기반으로 하며, 장마 및 태풍 내습시 집중호우에 따른 홍수발생으로 말미암아 대부분 국내의 하천은 상류는 산지, 중류는 곡저평야, 하류는 충적평야를 유하함으로서 구간별로 수리 및 하도 특성이 뚜렷이 구별된다. 홍수 예방을 위한 제방 축조와 용수공급을 위한 보 등 하천 구조물이 설치되어 있으며, 하천 주변에는 배산임수의 취락형성에 따라 주거지 및 대규모 도시가 발달하면서 많은 하천교란이 유발되고 있다. 우리나라 하도 및 수리적 특성인 여울과 소 등의 미지형과 하상매몰도 등 서식환경의 특성 및 하안에 적용되고 있는 다양한 형태의 하천횡단 형상과 하도개수 등 교란 특성을 중점적으로 고려하여 하천의 물리적 특성을 정량적으로 평가할 수 있는 평가체계를 개발하였다. 하도의 물리적 특성은 유량과 하상경사를 매개변수로 하는 유수력에 의하여 변화하므로 하천 유형을 하상경사에 따라 세그먼트 분류법을 적용하여 세그먼트 M, 세그먼트 1 및 세그먼트 2,3으로 구분하고 세그먼트별 하도 및 수리 특성, 하안 및 하천교란 영역에 대한 총 10개의 정량적 평가지표를 개발하였다. 각 지표는 5등급으로 설정되어 있으며, 평가지표의 근거는 미국(EPA) 및 독일(LAWA)의 평가지표를 바탕으로 우리나라 실정에 맞게 수정하였다. 본 연구에서는 하천분류체계에 의한 하천유형의 차이를 고려할 수 있도록 개발된 하천 물리적 평가체계를 남강, 내성천, 갑천, 유등천에 적용하여 검증하고, 적용성을 평가하였다. 우리나라 하천환경의 고유한 특성을 고려한 물리적 하천환경 평가체계는 하천사업을 위한 현재의 하천환경의 진단 및 하천사업의 효과 및 분석 등에 활용할 수 있으며, 하천관리를 위한 지구지정의 정량적 기준 및 관리목표 설정 등 하천계획 설계의 실무과정에서 매우 유용하게 적용될 수 있을 것으로 판단된다.

• Journal of Convergence for Information Technology
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• v.11 no.6
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• pp.181-187
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• 2021

As the aging society progresses and the functional cosmetics market is revitalized we have learned that the functional cosmetics that the silver generation is most interested in are wrinkle-improving products and we are making great efforts to develop functional cosmetics that improve wrinkles. The ingredients are actually making. From the early 2000s when the development of functional cosmetics began to the present the research trends of functional cosmetics for wrinkle improvement were analyzed by analyzing papers on functional cosmetics for wrinkle improvement. Research methods focused on literature search and SIRS paper search keywords. And the cosmetic material that needs to be researched focuses on the anti-aging function among functional cosmetics which is the anti-wrinkle function. The research results show the rapid growth of the Anti-aging market. As the population ages the generation of silver with high purchasing power will expand and a market for expensive anti-aging products and services for a healthy old age will be formed.

• Journal of the Korean Society of Clothing and Textiles
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• v.13 no.2 s.30
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• pp.155-165
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• 1989

The purpose of this study was to investigate on the sleeve form variation according to arm movements for elderly women. This study was experimented using the Plaster gypsum. The subjects who were elderly women were divided into three groups according to Rorher Index. Arm movements were five type ($0^{\circ},\;45^{\circ},\;90^{\circ},\;135^{\circ},\;180^{\circ}$) to each the vertical motion in front and in side. The statistical analyses used in this study were Mean, Standard Deviation, Spearman's correlation coefficients, paired T-test, Kruskal-wallis one-way ANOVA and Duncan's multiple range test. The results were as follows: 1) Increasing the movements, the width of the sleeve increased and the height of the sleeve cap decreased but girth of the sleeve cap was not consistant. 2) When varied the rates of the three aspects of the sleeve, the height of the sleeve cap showed the largest variation rate. 3) There was a negative correlation between the height and the width of the sleeve. On the other hand, there was a positive correlation between the sleeve width and the sleeve girth. 4) There were the vertical motion differences between in front and in side on the three aspects of sleeve. 5) The sleeve width and the sleeve girth were different according to somatotypes but the height of the sleeve cap was not different. 6) According to the variation rates of the body surfaces in length of standard lines, the form of sleeve was changed more in the front than in the back. Maximum variation rate showed in the areas of $D_1-D_3,\;E_1-E_3$ in the horizontal lines and $A-E_2$ in vertical lines. 7) According to the comparative drawing of the heights of sleeve cap and sleeve girth, the sleeve basic pattern $S_1(A.H/4)$ was more suitable for the direction $0^{\circ}\;and\;45^{\circ}$. And the basic pattern S_6(A.H/5)$ was more suitable for the direction $90^{\circ}$, the pattern $S_7(A.H/6)$ suitable for the direction $135^{\circ}$, and the pattern $S_8(A.H/8)$ was more suitable for the direction $180^{\circ}$.