• 한국조경학회지
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• 제36권1호
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• pp.28-37
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• 2008

This study intends analyzes the experience urbanites need regarding rural amenities when visiting rural areas for leisure. For this purpose, 18 rural amenities that can be experienced at 65 traditional rural villages and are designated by the rural development administration(RDA) were selected. Based on rural amenity selection, a questionnaire survey was conducted in 10 cities with 1,052 urban residents. The cities were divided into 5 metropolitan cities(Seoul, Busan, Daegu, Kwangju and Daejeon) and 5 small cities in each province(Chuncheon, Suwon, Jeonju, Chungju and Pohang). The study results suggest that of the 18 rural amenities, urbanites want greater experience with landscape resources near water and forests, health resources related to food and traditional resources such as traditional architecture and culture. Those amenities not chosen were animals, famous people and agricultural landscapes. In addition, women indicated more experience needs than men. Specifically, women want to experience the rural amenities dealing with tradition and health. In addition, people under 40 want to experience active program related festivals(events) and arts and crafts, whereas the group over 40 prefers a non-active program, such as observing the rural landscape and planting. College graduates want to experience the landscape while college students prefer arts and crafts and festivals(events). Those with below average salaries want to experience the most rural amenities. There were no differences in experience needs between those surveyed in metropolitan cities and those in small cities. Finally, the people who visited rural areas within the last year want to experience water, plants, agricultural landscape, health and rural life resources more than other groups, and there is correlation between plans to visit rural villages and experience needs. The results of this study provide insightful information for rural planning strategies such as selection of the type of marketing segments.

• Membrane and Water Treatment
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• 제9권5호
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• pp.335-342
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• 2018

Micelle-Enhanced Ultrafiltration (MEUF) is a membrane separation processes that improving ultrafiltration process with the formation of micelles of the surface active agents. Surface active agents are widely used to improve membrane processes due to the ability to trap organic compounds and metals in the treatment of industrial waste water. In this study, surface active agents are used to improve micelle-enhanced ultrafiltration (MEUF) to reduce chemical oxygen demand (COD), total dissolved solid (TDS), turbidity and clogging the membrane in dairy wastewater treatment. Three important operational factors (anionic surface active agent concentration, pressure and pH) and these interactions were investigated by using response surface methodology (RSM) and Box-Behnken design. Results show that due to the concentration polarization layer and increase the number of Micelles; the anionic surface active agent concentration has a negative effect on the flux and has a positive effect on the elimination of contamination indices. pH, and the pressure have the greatest effect on flux. On the other hand, it could be stated that these percentages of separation are in the percentages range of Nano-filtration (NF). While MEUF process has higher flux than NF process. The results have been achieved at lower pressure while NF process needs high pressure, thus making MEUF is the replacement for the NF process.

• 보건교육건강증진학회지
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• 제33권4호
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• pp.55-65
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• 2016

Objectives: Members of Korean Healthy Cities Partnership(KHCP) has increased rapidly since 2006 and adopted Active Living Environments(ALE) as common theme in 2015. Academic definition and categorization, needs assessment and operational planning for making active living environments were required from KHCP. Methods: Literatures review, survey to members of KHCP, specialist discussion and consultation with members of KHCP have been done from October of 2015 to February of 2016. Results: ALE included humane(social networks), physical and political resources. Three categories and 13 items for ALE were identified. Present actions among member cities were variable and especially immature in physical environments. Indicators for ALE were not secured stably. Requirements for policy and physical environmental approach and adolescent programme were high. Priority areas for education and technical assistance were master planning, guideline and case, program and policy development, partnership development, and networking among cities. Representative projects among member cities were somewhat different from ideal models. Conclusions: Policy and environmental approaches needs to be reinforeced systemically for members of KHCP including securing stable indicators. More education and technical assistance also needed sustainably.

• 한국노년학
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• 제40권3호
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• pp.389-411
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• 2020

본 연구는 한국 시니어 소비자들의 욕구와 그 특성을 파악하는데 목적을 두었다. 이를 위해 매슬로우의 7단계 욕구위계 이론의 각 욕구 요인들을 한국 실정에 맞게 재정립하여 적용하였다. 새롭게 정립한 시니어 소비자의 욕구 요인과 측정 문항의 신뢰성 및 타당성을 입증하여 인구통계학적 특성에 따른 욕구의 차이와 관계성을 밝히고자 하였다. 연구 분석을 위해 한국에 거주하는 액티브 시니어 세대로 불리는 장년층과 시니어 세대에 해당하는 440명(만 50세~75세)의 성인을 대상으로 7단계의 욕구 요인과 인구통계학적 특성에 대한 온라인 설문조사를 하였다. 연구 결과 첫째, 한국 시니어 소비자들의 7단계 욕구가 매슬로우의 단계와는 다른 순서로 도출되었다. 특히, 소속감 및 사랑, 자아존중감 욕구의 순위가 달라졌으며, 인지적 욕구와 심미적 욕구가 자아실현 욕구 단계보다 상위에 위치한다는 것이 확인되었다. 둘째, 시니어 소비자들의 인지적 욕구와 심미적 욕구는 성별, 연령대에 따른 차이를 보였으며 생리적, 자아존중감, 인지적, 심미적, 자아실현 욕구는 시니어 소비자들의 월평균 수입에 따라 차이가 있는 것으로 확인되었다. 또한, 자아실현 욕구는 최종학력에 따른 차이를 보였다. 따라서 본 연구는 급변하는 인구의 고령화와 베이비부머 세대의 본격적인 은퇴 등으로 부각된 한국 시니어 소비자들의 욕구 특성을 밝혔다. 그와 더불어, 한국 시니어 소비자들의 독특한 욕구는 매슬로우의 위계와는 다른 위계 순서를 갖는다는 점을 밝혀냈다는 것에 의의를 둘 수 있다. 그 외의 다양한 이론적 함의와 실무적 함의도 제시되었다.

• 한국콘텐츠학회논문지
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• 제18권10호
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• pp.584-595
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• 2018

본 연구의 목적은 초등학생의 체육수업 기본심리욕구 충족정도가 학교행복감과 신체적 라이프스타일에 미치는 영향을 살펴보는 것이다. 이를 위해 I 도시, 5개 초등학교 300명의 초등학생에게 설문지가 배부되었다. 불성실하게 응답한 설문지 22부를 제외한 총 278부의 설문지가 자료분석에 사용되었다. 자료분석을 위해 기술분석, 탐색적 요인분석, 상관관계분석, 다중회귀분석이 사용되었다. 상관관계분석 결과, 체육수업 기본심리욕구의 유능감과 관계성은 중 고강도 신체활동 및 학교행복감의 모든 하위변인들과 정적인 상관관계를 나타냈다. 다중회귀분석결과, 기본심리욕구의 유능감은 자기존중감과 교사관계 학교행복감에 정적인 영향을 미쳤으며, 중 고강도 신체활동에 정적인 영향을 미쳤다. 기본심리욕구의 관계성은 학교행복감의 모든 하위요인에 정적인 영향을 미쳤다. 본 연구의 결과에 따르면, 체육수업 기본심리욕구의 충족은 학교행복감의 중요한 요소이며, 신체적으로 적극적인 학생으로 이끄는 중요한 심리기전으로 밝혀졌다. 본 연구를 통해 초등학교 체육수업의 가치가 더욱 부각되기를 바란다.

• Journal of Electrochemical Science and Technology
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• 제15권2호
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• pp.207-219
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• 2024

Metal-N-C (MNC) catalysts have been anticipated as promising candidates for oxygen reduction reaction (ORR) to achieve low-cost polymer electrolyte membrane fuel cells. The structure of the M-N_x moiety enabled a high catalytic activity that was not observed in previously reported transition metal nanoparticle-based catalysts. Despite progress in non-precious metal catalysts, the low density of active sites of MNCs, which resulted in lower single-cell performance than Pt/C, needs to be resolved for practical application. This review focused on the recent studies and methodologies aimed to overcome these limitations and develop an inexpensive catalyst with excellent activity and durability in an alkaline environment. It included the possibility of non-precious metals as active materials for ORR catalysts, starting from Co phthalocyanine as ORR catalyst and the development of methodologies (e.g., metal-coordinated N-containing polymers, metal-organic frameworks) to form active sites, M-N_x moieties. Thereafter, the motivation, procedures, and progress of the latest research on the design of catalyst morphology for improved mass transport ability and active site engineering that allowed the promoted ORR kinetics were discussed.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.169-173
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• 2007

To improve the riding comfort and to increase the speed of high-speed railway, it needs active suspension system for railway more and more. In Korea, Korean Train Express (KTX) was opened to commercial traffic 3years ago. Korea High-speed Railway (HSR 350x) was developed and succeeded 350km/h test run by Korean government and several related institute. With the increase of the speed, the vibration control of the high-speed railway becomes important to improve high ride quality. To meet this request, the authors suggest the installation of lateral semi-active damper to the power car of HSR 350x. The result shows better performance.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2012년도 추계학술대회 논문집
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• pp.137-138
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• 2012

In this paper, three-port flyback inverter with Active Power Decoupling(APD) circuit is analyzed. Conventional flyback inverter with passive power decoupling circuit needs the electrolytic capacitor with large capacitance for decoupling between constant DC power and instantaneous AC power. However the electrolytic capacitor has low lifespan about 50000 to 100000 hours. So the active power decoupling techniques are applied to reduce input capacitance of flyback inverter. Thus the overall system can achieve smaller size and longer lifespan. Proposed three-port flyback inverter is verified by design optimization, simulation and experimental result.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 추계학술대회 논문집(II)
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• pp.436-441
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• 2003

The railroad geotechnical management system using ActiveX component is developed In this study. Component software is realized as a way that can offer good productivity and stability in software production through maximizing the reusability of software. Developed component software is very useful in saving to much time required for the development, increasing the re-usage rates, utilizing the component per function and substantially reducing the expenses for the tests and the error corrections. In addition, since it is easy to replace with other types of components that satisfy the needs of users, we can easily customize the applications.

• Journal of Dairy Science and Biotechnology
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• 제31권2호
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• pp.195-200
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• 2013

The ripening of cheese allows for the development of characteristic taste and flavour, nutritional substances, bio-active components and texture, helping to improve quality. Many different microbiological, biochemical and nutritional changes occur during the process depending on the quality of raw milk, added cultures and enzymes, as well as specific processing and ripening conditions. During the ripening lactose is hydrolyzed to lactic, propionic and acetic acid, helping to reduce potential effects of the problem of lactose intolerance. Fat is hydrolyzed to butyric, propionic and conjugated linoleic acid, which function as bio-active substances. Protein is hydrolyzed to different peptides and amino acids which all show various bio-activities. However, errors of cheese ripening can happen and affect the quality of the product. To guarantee good quality cheese the process needs to be managed carefully with the right microbes used and ensuring cleanliness of processing facilities, staff, ventilation and hazard analysis and critical control points (HACCP). Research into and controlling of ripening technology is crucial for producing high quality cheeses.