• Journal of Korean Society for Atmospheric Environment
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• 제22권E1호
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• pp.9-18
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• 2006

Aerosol hygroscopic properties were measured by a tandem differential mobility analyzer (TDMA) system during the Aerosol Characterization Experiment (ACE)-Asia campaign from 31 March to 1 May 2001. Two high flow differential mobility analyzers (DMAs) were used to maximize the count rate on board the Center for Interdisciplinary Remotely Piloted Aircraft (CIRPAS) Twin Otter aircraft. Hygroscopic growth factor distributions of particles having initial dry nanoparticle diameters of 0.040, 0.059, 0.086, 0.126, 0.186, 0.273, 0.400, and $0.586{\mu}m$ were measured during 19 research flights. Data collected during 12 of those flights were used to investigate aerosol mixing state and the influence of aerosol source region on size-resolved hygroscopicity. The uniformity in size-resolved hygroscopicity was quantified to facilitate comparison between measurements made in different air masses. Hygroscopic growth factors are strongly dependent on source region and sizes. Mean hygroscopic growth factors were observed to be greatest when the air mass origin was from the south. The mean growth factors for continental sources decreased with initial size from 1.47 to 1.27 for $0.040{\mu}m\;and\;0.586{\mu}m$, but increased with initial size from 1.44 to 1.8 for $0.040{\mu}m\;and\;0.400{\mu}m$ dry diameters for marine sources.

• Advances in nano research
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• 제16권1호
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• pp.91-109
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• 2024

Carbon nanotubes are drawing wide attention of research communities and several industries due to their versatile capabilities covering mechanical and other multi-physical properties. However, owing to extreme operating conditions of the synthesis process of these nanostructures, they are often imposed with certain inevitable structural deformities such as single vacancy and nanopore defects. These random irregularities limit the intended functionalities of carbon nanotubes severely. In this article, we investigate the mechanical behaviour of double-wall carbon nanotubes (DWCNT) under the influence of arbitrarily distributed single vacancy and nanopore defects in the outer wall, inner wall, and both the walls. Large-scale molecular simulations reveal that the nanopore defects have more detrimental effects on the mechanical behaviour of DWCNTs, while the defects in the inner wall of DWCNTs make the nanostructures more vulnerable to withstand high longitudinal deformation. From a different perspective, to exploit the mechanics of damage for achieving defect-induced shape modulation and region-wise deformation control, we have further explored the localized longitudinal and transverse spatial effects of DWCNT by designing the defects for their regional distribution. The comprehensive numerical results of the present study would lead to the characterization of the critical mechanical properties of DWCNTs under the presence of inevitable intrinsic defects along with the aspect of defect-induced spatial modulation of shapes for prospective applications in a range of nanoelectromechanical systems and devices.

• 토지주택연구
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• 제8권4호
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• pp.285-294
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• 2017

Recently, as the paradigm of regional development has been transformed into characterization, decentralization and cooperation, small and medium scale development is in the spotlight. In particular, as the transfer of planning authority to local governments accelerates, LH is in the process of seeking to transform itself into a system that is in line with local government demand. The purpose of this study is to elaborate the regional pending projects that meet the demand of the region. The Jeju Special Self-Governing Province is the area where land and housing prices have increased more than three times recently, which is the area of interest in recent years due to the various demand for development projects. Another objective is to establish a local government based on LH's system, it is aimed to derive a collaboration method with local government, province corporation and local researchers. The criteria for deriving the cooperation projects between the local government and LH are basically the ones that can be carried out by LH and future-oriented projects. The process of deriving has undergone the process of statutory planning, unscrupulous plan analysis, and consultation of experts' advisory committees. In order to derive the regional cooperation project, four criteria such as local uniqueness, future possibility, business promotion efficiency, and local cooperation project were set. Major projects of the Jeju Special Self-Governing Province are improvement of the surrounding traffic system, construction of the hinterland due to the construction of the second airport, and establishment of Cruise Port(Jeju Port, Seogwipo Port). The role of each entity in the implementation of regional cooperation projects is as follows. Local government should request subsidies for the projects in case of lack of budget support and secure them through competition with other regions. In addition, it should be responsible for the operation and management of the facility once it has been supported and completed smoothly. The Ministry of Land, Infrastructure and Transport affects each region through approval and subsidy of the development plan. After the development project is completed, it evaluates the development project through monitoring and plays a role of continuously improving the system. As a business operator, the provincial corporation will carry out small-scale projects including non-physical projects such as community participation. In the case of LH regional headquarters, the general manager of the region will establish a comprehensive business plan, secure development availability, and carry out large-scale growth promotion projects.

• 농촌계획
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• 제20권1호
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• pp.161-173
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• 2014

This study aimed to adaptive reuse plan a take advantage of Suncheon Bay Garden Expo 2013. Detailed objectives included: to identify and foster cultural and ecological resources in Suncheon Bay and Garden Expo Site; and to search and propose characterized program in the site for efficient utilization; and to revitalize a site for the vitalizations of the region where garden culture and garden industries for strengthening local competitiveness. The study was multi-phased. The first stage included basic surveys such as site status and environmental context analysis, and questionnaires and similar case studies, and the second stage was to review the direction of preliminary planning, develop associated industries and strategies for regional revitalization and review and incorporate project details. And the third stage aimed to develop a comprehensive plan from spatial plans and program plans and suggest plans to vitalize the operation of the site. The results of the study are as follows: First, the characterization strategy is 'healing experience tourism', 'healing garden', 'healing herbal care' are suitable for the site and regional revitalization. Second, the dimension of 2013 Suncheon Bay Garden Expo which was distinguished into four areas, in consideration of the characteristics and contents of the garden expo site for efficient operation and maintenance. Four area are as follows: the park oriented area, the experiential tourism oriented area, the existing conservation oriented area, and the area for associated industries. Third, the practice of private and public partnerships is needed in order to efficiently manage and operations. The significance of this study is that it is seeking to take advantage of the Garden Expo site and set the plan by existing resources and in consideration of local characteristics, in conjunction with area to envision and proposed management plan. Some problems are remained which have not been able to deal with details program and organization and financial planning programs for the operation of the site. This is for further study.

• 한국경제지리학회지
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• 제25권3호
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• pp.339-356
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• 2022

본 연구는 창업과 기업 성장 기반이 취약한 비수도권 지역에서 지역대학의 우수한 연구·산학협력 역량을 기반으로 캠퍼스에 지역혁신생태계를 구축한 사례로서 일본의 홋카이도대학 리서치&비즈니스파크에 주목한다. 홋카이도대학 리서치&비즈니스파크는 캠퍼스 유휴부지를 활용하여 지역 주도로 중장기계획을 수립하고, 그에 따라 2003년부터 지금까지 점진적인 개발과정을 거쳐서 조성되고 있으며, 지역대학 특성화와 지역산업 기반을 고려한 바이오산업클러스터 구축이라는 산업적 접근 방식을 통해 산학협력 활성화를 추구하였다. 또한 지역 산학연관 협력적 거버넌스에 의해 다양한 기업지원 서비스를 제공한다. 이러한 홋카이도대학 리서치&비즈니스파크 조성전략은 최근 캠퍼스 혁신파크 등 대학 캠퍼스를 활용하여 지역의 발전을 도모하는 각종 정책 및 사업에 중요한 정책적 시사점을 제공한다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 추계학술대회
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• pp.191-193
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• 2022

인공지능, 빅데이터 등 디지털 기술의 촉발로 인한 4차 산업혁명의 도래는 사회, 문화, 산업 등에 많은 변화를 일으켰다. 하지만, 각 지역의 전통시장은 새로운 유통환경과 소비자 변화에 신속하게 대응하지 못하고 있다. 특히, 제주지역 전통시장의 경우 제주 방문 관광객 대상의 마케팅 전략 등 지역적 특성을 살리지 못하고 있다. 이에 본 연구에서는 제주 지역적 특성을 고려한 빅데이터 및 인공지능 기반의 스마트 전통시장 구축에 대해 제언하고자 한다. 연구 내용으로는 방문자 빅데이터 분석을 통한 고객 프로파일링, 트래픽 분석을 통한 관광객 동선 결과제공, 실시간 인기 제품 차트 제공, 영상기반 화재 및 범죄 예방 기능 개발 등이 있다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2002년도 총회 및 춘계학술발표회
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• pp.110-113
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• 2002

Statistical- based, principal component analysis (PCA) was applied to chemical data from two underground storage systems containing LPG to assess the usefulness of such technique at the initial stage (Pyeongtaek) or middle stage (Ulsan) of hydrochemical studies. For the first case, both natural and anthropogenic contamination characterize regional groundwater. Saline water buffered by Namyang lake affects as a natural factor, whereas cement grouting influence as an artificial factor. For the second study area, contaminations due to operation of LPG caverns, such as disinfection activity and cement grouting effect, deteriorate groundwater quality. This study indicates that principal component analysis would be particularly useful for summarizing large data set for the purpose of subsurface characterization, assessing their vulnerability to contamination and protecting recharge zones.

• 대한수학회지
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• 제51권5호
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• pp.971-985
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• 2014

All modules considered in this note are over associative commutative rings with an identity element. We show that a ${\omega}$-local module M is Rad-supplemented if and only if M/P(M) is a local module, where P(M) is the sum of all radical submodules of M. We prove that ${\omega}$-local nonsmall submodules of a cyclic Rad-supplemented module are again Rad-supplemented. It is shown that commutative Noetherian rings over which every w-local Rad-supplemented module is supplemented are Artinian. We also prove that if a finitely generated Rad-supplemented module is cyclic or multiplication, then it is amply Rad-supplemented. We conclude the paper with a characterization of finitely generated amply Rad-supplemented left modules over any ring (not necessarily commutative).

• 대한공간정보학회지
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• 제18권1호
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• pp.83-88
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• 2010

본 논문은 수도권 내 지역을 도시적 특성에 따라 군집 분석하여 수도권의 지역유형을 구분하고 그 특성을 파악하고자 하였다. 수도권 도시의 유형화를 위해 2005년을 시점으로 도시의 구성요소인 인구, 활동, 토지 및 시설을 나타내는 지표 10가지를 선정하였으며, 주성분분석을 통해 변수들의 공통된 특성이나 유사한 성질에 따라 공통인자를 추출하였다. 추출된 인자에 대한 인자득점을 이용하여 군집분석을 행하였고, 군집분석의 방법은 계층적 군집방법인 최단연결법, 최장연결법, 평균연결법, 와드법을 이용하였다. 그 결과 수도권을 5개의 군집으로 유형화 할 수 있었다.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2001년도 추계학술대회 논문집
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• pp.435-436
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• 2001

대기 중 에어로졸 입자의 크기 분포를 측정하는 기기 중 광학적 입자 계수기(Optical Particle Counter)는 0.3$\mu\textrm{m}$에서 25$\mu\textrm{m}$ 사이의 입자의 크기를 개개의 입자에 대한 산란광의 강도를 측정하여 그 강도와 미리 정해진 강도와의 관계에 의해 입자의 크기를 추정한다(Chun et al., 2001). 본 연구에서는 2001년 4월 제주 고산에서 실시된 ACE-Asia(Asian Pacific Regional Aerosol Characterization Experiment) 집중 관측 기간 중 광학적 입자 계수기(Optical Particle Counter; HIAC/ROYCO 5230)를 이용하여 측정한 이 기간 중 에어로졸 입자의 크기 분포의 특성을 황사시와 비황사시, 그리고 강수시와 비강수시로 나누고 그 특징을 비교하여 보았다. (중략)