• 한국안전학회지
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• 제33권4호
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• pp.111-118
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• 2018

Korea is facing a surge in the aging population, showing that population aged 65 and above will be accounted for 42.5% of the total population in 2065 with the emphasis on the over-80 population consisting of 19.2%. In response to this abrupt change in population structure, the number of traffic fatality accident referring to older driver as aged 65+ years had been increasing from 605 fatalities in 2011 to 815 fatalities in 2015 resulting in increases in 34.7% in oppose to happening to decreases in 17.2% about non-older driver. With Logit analysis based on Newton-Raphson algorithm utilizing older driver's traffic fatality data for the 2011-2015 years, it was found that the likelihood of an accident resulting in a fatality for super older driver aged 80 years and above considerably increased compared to other older driver with aging classification: 2.24 times for violation of traffic lane, 2.04 times for violation of U-turn, 1.48 times for violation of safety distance, 1.35 times for violation of obstacle of passing; also average annual increase of traffic accident cost related to super older driver was fairly increased rather than other older driver groups. Hence, this study proposes that improving and amending transport safety system and Road Traffic Act for super older driver needs to be urgently in action about license management, safe driving education, etc. when considering the increase of over-80 population in the near future. Also, implementing a social agreement with all ages and social groups to apply with advanced driver assistance system for older driver groups will be able to become a critical factor to enhance safe driving over the face of the country.

• 한국산학기술학회논문지
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• 제14권1호
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• pp.464-469
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• 2013

부산광역시는 2000년 고령화사회에 진입한 이후, 2011년 기준 고령화율이 7대 도시중 가장 높은 11.8%에 이르고 있다. 또한 전체인구 및 평균세대원수가 감소하는 가운데 65세 이상 고령인구는 급격히 증가하고 있어 2020년 이후 고령화율이 20%를 상회하는 초고령사회로의 진입이 예상된다. 이에 본 연구는 그 동안의 고령층의 주거 관련분석이 동단위로 이루어져 보다 미시적인 분석의 필요성 증가에 따라 2000년부터 2010년 사이에 조사된 센서스 집계 구단위의 공간분석을 실시하였다. 이를 활용하여 고령인구의 밀집지역, 급증지역, 고밀지역등과 같은 관심지역을 1차 추출하여 미시적인 위치와 공간상의 분포 패턴을 분석하였다. 분석결과 고령인구는 도심과 그 인접지역인 고지대에 밀집해 있었으며, 특정 집계구의 경우 10년간 증가속도가 30배 이상으로 나타났다. 이러한 지역의 국지적 수준의 분포 특성을 살펴보면, 부산시 원도심에 고령인구의 편중이 심화되고 있고, 2000년부터 2010년까지 부산의 전반적 분포 패턴에서는 고령인구가 점점 분산되고 있는 것을 확인했다. 이는 이전의 관련연구 결과와 대치되는 결과로 향후 초고령사회 진입에 따른 사회적 비용의 경감과 고령층의 삶의 질 개선을 위한 공간적 차원의 대응을 위한 기초자료로의 활용이 기대된다.

• 한국해양공학회지
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• 제27권2호
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• pp.75-79
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• 2013

This study was carried out to investigate the precipitation behavior of the ${\chi}$ phase and the impact toughness of 25%Cr-7%Ni-2%Mo-4%W super duplex stainless steel. The ${\chi}$ phase was precipitated in the early stage of aging, and with the increasing aging time. However, after reaching a maximum value, the number decreased as a result of the gradual transformation of the ${\chi}$ phase into the ${\sigma}$-phase. It was proved that the ${\chi}$ phase was an intermetallic compound, which represented a lower nickel concentration, higher chromium and molybdenum concentrations, and very higher tungsten concentration compared to the matrix phases. It also showed higher molybdenum and tungsten concentrations than the ${\sigma}$ phase. The decomposition of the ferrite phase into the ${\gamma}_2$ and ${\sigma}$ phases was retarded by W substitution for Mo. Thus, the number of ${\chi}$ phases increased. The impact value was decreased by the substitution of W for Mo. The impact toughness rapidly decreased with time when the ${\chi}$ phase began to precipitate in the initial stage of aging. The impact toughness was, therefore, greatly influenced for the precipitation of the ${\chi}$ phase.

• 디자인학연구
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• 제19권3호
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• pp.117-130
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• 2006

This paper analyzed the current status of universal design in the Republic of Korea (Korea) and Japan. In the case of Japan, the aged society or the super aged society has been preparing from 1985 when the aging rate was 10%. Japan's activity to prepare it became promoted during 1990's when per capita Gross National Income (GNI) was $$20,000{\sim}40,000$. In Korea, the preparation for the aging society such as physical environment, barrier free buildings or traffic systems, economic support and investigation or survey is not yet sufficient. Korea must start preparation for an aged society, possibly and quickly. And it needs to prepare until 2026, when the aging rate will be 20%. To prepare a barrier free and an aged society must consider both aging and economic status.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
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• pp.28-30
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• 2009

PDP panels with MgO protective layer are manufactured by using the "all-in-vacuum" process we have established [1]. This is the process aiming to keep the MgO surface as clean as possible after the evaporation. The panels are evaluated in term of discharge voltage, aging time, luminance, luminous efficacy, discharge time-lag. It is confirmed that the "all-in-vacuum" process particularly improves the aging time, discharge voltage and the discharge time-lag.

• 대한지리학회지
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• 제48권3호
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• pp.402-416
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• 2013

본 논문은 1985년부터 2010년까지 수도권 고령인구의 공간적 분포 패턴의 변화를 고령화수준에 따라 파악하고, 이와 관련하여 2010년 시점에서 고령자 가구의 주거 특성을 해석하고자 한 것이다. 고령화수준은 고령화지역, 고령지역, 초고령지역으로 구분하여 고찰하였으며, 고령자 가구의 주거 특성은 주택유형, 주택점유형태, 주택연한 등의 변수를 이용하여 해석하였다. 수도권의 고령화는 서울과 인접하지 않은 수도권 외곽지역부터 진행되었다. 서울과 인천은 고령화가 도심부에서부터 외곽으로 진행되는 경향을 보인다. 고령자 가구는 자가 소유의 단독주택에서, 그리고 건축 연한이 20년 이상인 주택에 거주하는 비율이 높았으며, 수도권의 외곽지역으로 갈수록 이런 주거 특성이 강하다.

• Journal of Advanced Marine Engineering and Technology
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• 제23권6호
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• pp.761-769
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• 1999

In this paper the effect of aging heat treatment to the Corrosion behavior for the Nimonic 80A superalloy was studied by AC Impedance methods. Tested solution was 3.5% with tempera-ture $25^{\circ}C$ Electro-chemical corrosion test were carried out for the Nimonic 80A super-alloy which solution heat treated at $1080^{\circ}C$ for 8 hours followed by aging heat treated at $650^{\circ}C,\;700^{\circ}C,\;750^{\circ}C\;800^{\circ}C$ and $850^{\circ}C$ with 16hours under vacuum environment. The obtained results were as follows; 1. Base metal and solution-treated materials were exhibited similar corrosion tendency as Ran-dle equivalent cell. The value of passive film resistance was 579 ohms for the base metal and 124,770 ohms for the solutionized metal such a difference was arose by the ${{\gamma}_^'}$ precipitate on the metal surface during heat treatment. 2. The measure value of $R_p$ for heat-treated at $650^{\circ}C,\;700^{\circ}C,\;800^{\circ}C$and $850^{\circ}C$ were 97,943, 93, 111, 26,961, 15,798 and 11,780ohm respectively. Which indicated that the passive film resistance Rp was reduced as aging temperature increased due to the growth of grain size and sensitization at the grain boundary. 3. The similar tendency was exhibited for corrosion behavior of the electro-chemical corrosion polarization method and AC impedance method and confirmed that AC impedance method was useful tool for corrosion research.

• 한국산업융합학회 논문집
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• 제23권4_2호
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• pp.683-691
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• 2020

In the era of super-aged societies, research and development (R&D) projects related to aging are very important agenda for establishing the direction of future R&D planning and technological competitiveness in the country. In order to respond promptly to this agenda, it is essential to establish a national-level convergence R&D policy. In this study, we utilized the global R&D funding project data from major nations (US, Europe, Japan), and then standardized them with the same fields. To analyze the current status of global R&D related to aging, we performed cluster analysis based on the co-occurrence matrix to explore convergence R&D areas in the US, Europe, and Japan related to aging. In addition, comparative analysis by country suggested that different points on the interdisciplinary area and the convergence of aging-related R&D by each country. These results provide fundamental understandings for the status of convergence in aging-related global R&D, the current technology trends, and establish the direction and strategy of R&D policy.

• 한국해양공학회지
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• 제23권3호
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• pp.40-45
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• 2009

With the increase in the annealing temperature, the volume fraction of austenite phase increased and the volume fraction of ferrite phase decreased. In compliance with the addition of N, not only the volume fraction of austenite phase was increased but also the austenite structure was made larger. Volume fraction of ${\sigma}$ phase was increased by decreasing of the volume fraction of ferrite phase, with the increase in the aging time and in compliance with the addition of N. As increasing in volume fraction of ${\sigma}$ phase, tensile strength and hardness increased, while elongation and impact value decreased. Elongation slowly decreased and impact value rapidly decreased at the early stage of aging. By the added N, tensile strength, elongation, hardness and impact value was increased.

• 건설안전기술
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• 통권55호
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• pp.10-17
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• 2012

Aging society may approached to our society during snatch very, and enter in super aging society for more span. Investment that we which live 21th century are many in people's quality of life elevation meantime did not consist, but stand in visual point that must improve many portions forward. For front, repletions for many equipments that consider aged on our society must consist, and much researches may have to be gone for this. According to traffic accident result, percentage of older pedestrian deaths was 46.5% as much in Korea. In particular, the crossing accidents by 59% or more of the older pedestrian traffic safety measures that target is an urgent situation. Therefore, in this study was to identify the domestic status and problem on no-sidewalk region for older pedestrians. In addition, side walk the installation and maintenance plan presented to prepare for aging society.