• 제목/요약/키워드: alternative concept

검색결과 796건 처리시간 0.024초

An original device for train bogie energy harvesting: a real application scenario

  • Amoroso, Francesco;Pecora, Rosario;Ciminello, Monica;Concilio, Antonio
    • Smart Structures and Systems
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    • 제16권3호
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    • pp.383-399
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    • 2015
  • Today, as railways increase their capacity and speeds, it is more important than ever to be completely aware of the state of vehicles fleet's condition to ensure the highest quality and safety standards, as well as being able to maintain the costs as low as possible. Operation of a modern, dynamic and efficient railway demands a real time, accurate and reliable evaluation of the infrastructure assets, including signal networks and diagnostic systems able to acquire functional parameters. In the conventional system, measurement data are reliably collected using coaxial wires for communication between sensors and the repository. As sensors grow in size, the cost of the monitoring system can grow. Recently, auto-powered wireless sensor has been considered as an alternative tool for economical and accurate realization of structural health monitoring system, being provided by the following essential features: on-board micro-processor, sensing capability, wireless communication, auto-powered battery, and low cost. In this work, an original harvester device is designed to supply wireless sensor system battery using train bogie energy. Piezoelectric materials have in here considered due to their established ability to directly convert applied strain energy into usable electric energy and their relatively simple modelling into an integrated system. The mechanical and electrical properties of the system are studied according to the project specifications. The numerical formulation is implemented with in-house code using commercial software tool and then experimentally validated through a proof of concept setup using an excitation signal by a real application scenario.

편측 구순구개열 환자에서 ANS 골절단술을 이용한 코 비대칭의 교정 (ANS Repositioning for Correction of Asymmetric Nose in Unilateral Cleft Lip and Palate)

  • 정영수;김기호;이상휘;이충국
    • 대한구순구개열학회지
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    • 제8권2호
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    • pp.87-94
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    • 2005
  • Patients with unilateral cleft lip and palate (UCLP) generally demonstrate the asymmetries in the lip, nose and the naso-maxillary complex. And their skeletal asymmetries are known to be derived from the displacement of nasal septum, anterior nasal spine (ANS) and the pre-maxilla toward the non-affected side during the developmental and growth period. Due to the interruption of the important facial muscles, which are critical for the symmetric growth of premaxilla, functional matrix system fails to develop and results in the displacement of the ANS toward the non-affected side and nasal asymmetry. Therefore the rhinoplasty for CLP patients is required to have inter-skeletal and muscular rearrangement in the naso-maxillary complex in order to let them recover from esthetic and physiologic imbalances. And functional cheilorhinoplasty (FCR) has been a representative treatment of choice for this concept of treatment modality. The outcome and prognosis of primary or repair FCR have been known to be definitely affected by timing of the operation as well as adequate reconstruction of naso-labial muscles. However, sometimes FCR has an ineffective treatment results for patients after the facial growth period, and the limited rhinoplasty around the nose often fails to bring satisfying results. In order to circumvent this limitation, we performed ANS osteotomy for patients with unilateral CLP showing asymmetric nose, as an alternative way for corrective rhinoplasty. We could observe that the nose was rearranged along the facial mid-line by this osteotomy design and asymmetries were evidently improved postoperatively. Here we present this osteotomy method in CLP patients.

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Economics During Global Recession: Sharia-Economics as a Post COVID-19 Agenda

  • ARFAH, Aryati;OLILINGO, Fahruddin Zain;SYAIFUDDIN, S.;DAHLIAH, D.;NURMIATI, N.;PUTRA, Aditya Halim Perdana Kusuma
    • The Journal of Asian Finance, Economics and Business
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    • 제7권11호
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    • pp.1077-1085
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    • 2020
  • This research is a literacy study regarding the implementation and management of the economic role of haria as a new strategy in overcoming the problem of the global financial crisis that has hit the middle of the COVID-19 pandemic. The research method comes from previous studies to compare the capitalist, socialist, and sharia economic systems. In response to various economic uncertainties, both internal and external, the ability to seize opportunities and transform has become the key to economic resilience. Islamic economics can be an alternative in responding to the dynamics of the global and national economy. Several things need to be taken into consideration in fulfilling the sharia economy and the primary strategy chosen must come from the inputs given by the stakeholders, including business actors, associations, regulators as well as experts, and academicians. The primary strategy in implementing the sharia economy also requires the support of various parties in order to develop sustainability. Strengthening regulation and governance is one of the fundamental factors. Optimization of the sharia economy based social sector such as Zakat, Infaq, Sadaqah, and Waqaf can be optimized both for collection and distribution so that the concept of sharing can certainly support the development and the economy both nationally and globally.

개인용 소셜 서비스 로봇의 모듈화 방안 (Modularization for Personal Social Service Robots)

  • 신동영;박재완
    • 문화기술의 융합
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    • 제6권2호
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    • pp.349-355
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    • 2020
  • 현대 사회의 사회적 문제를 위한 대안으로 소셜로봇이 주목받고 있으며 소셜로봇의 효율적 관리를 위해 모듈화의 필요성이 제기되었다. 본 연구는 '개인용 소셜 서비스 로봇'의 개념을 재정립하고 이에 적용하기 위한 새로운 모듈화 방식을 제안하는 것을 목적으로 한다. 이를 위해 소셜 로봇과 서비스 로봇의 정의와 로봇의 모듈화에 대한 문헌연구를 수행하였다. 기존 서비스 로봇의 모듈화 사례를 분석하여 소셜 서비스 로봇의 모듈화에 적용하기 위한 고려사항을 도출하고 이를 바탕으로 새로운 모듈화 방안을 제안하였다. 본 연구는 모듈의 전기/전자적 부품 여부에 따라 액티브 모듈과 패시브 모듈로 구분하고, 액티브 모듈은 다시 로봇의 기본형과 교체형에 따라 기본 모듈, 추가 모듈로 분류했다. 이러한 방안이 적용된 실제 로봇의 프로토타입을 제작하는 것으로 모듈화를 검증하였다.

발생학습 전략의 적용이 계절변화 관련 지구과학개념 변화에 미친 효과 (The Effects on Earth Science Concepts about Seasonal Changes by Generative Learning Strategy)

  • 정진우;윤상화;이항로
    • 한국지구과학회지
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    • 제24권3호
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    • pp.160-171
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    • 2003
  • 본 연구에서는 계절 변화에 관련된 개념 유형을 분석하고, 관련 개념들에 관한 토의에 의해 인지갈등을 해소하는 방법을 강조한 발생학습 전략의 적용 효과를 알아보고자 하였다. 계절변화 관련 지구과학 개념 유형은 100가지 였으며, 그 중에서 66가지는 오개념을 포함한 비과학적 개념 유형이었다. 계절변화에 관련된 개념 평가도구는 R&D과정과 2번의 현장검증을 거쳐 개발되었다. 실험집단에는 지구과학개념 유형과 인지갈등을 반영한 4단계의 발생학습 전략을 적용하였다. 한편 통제집단에는 전통적인 교수 학습 전략을 적용하였다. 유의수준 .05에서 공변량분석을 실시한 결과 두 집단 간에는 유의미한 차이가 있는 것으로 나타났다. 이러한 연구 결과는 계절변화와 관련된 오개념을 지구과학적 개념으로 변화시키는 데 발생학습전략이 하나의 가능한 대안이 될 수 있음을 의미하는 것으로 볼 수 있다.

A. Carlson 의 객관주의적 자연 감상론에 대한 비판적 검토 (Is there an Objectivist Aesthetic Appreciation of Nature\ulcorner : A Critical Examination of A. Carlson's Theory)

  • 배정한;조정송
    • 한국조경학회지
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    • 제24권2호
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    • pp.25-42
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    • 1996
  • During the last two and a half decades, philosophical interest in the aesthetics of nature and environment has been gained momentum. One of the most coherent theories in this arena of debate has been developed over a series of articles by Allen Carlson. The purpose of this paper is to examine Carlson's theory critically and suggest an alternative aspect that remains untouched by his model. Briefly stated, Carlson's view of the appreciation of nature is that it is a matter of under standing nature under suitable scientific categories. His argument, based on the objectivist epistemology, is basically a disjunctive syllogism : a) The concept of appreciation, derived from traditional disinterestedness and Stolnitz's aesthetic attitude, provides an insight into the explanation of aesthetic appreciation of nature, and is objectivistic in the light of its object-oriented character. b) Nature must be appreciated as nature itself, and the natural environmental model is the appropriate loci of our nature appreciation. c) The paradigmatic form of our nature appreciation is order appreciation. d) There can be a correct and objective aesthetic judgment of nature, and the sources of guiding categories pertinent to it is natural science and natural history. In regarding nature as an environment and as natural, his natural environmental model is meaningful. Nevertheless, his stance results in some serious problems : a) The natural environmental model excludes certain very common appreciative responses to nature-responses of a less intellective, more visceral sort. Therefore, the arousal model with appropriate emotions might be one of our characteristic forms of nature appreciation. b) Even if we consider the scientific knowledge as an objective source of our nature appreciation, this gives rise to the question of whether the natural science can be objective or not. Is there an objectivist aesthetic appreciation of nature\ Does aesthetic appreciation of nature need to be science-based\

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모바일하버(Mobile Harbor)의 가치와 활용방안에 대한 연구 - 연안운송 중심으로 - (A study on Value and Application of Mobile Harbor in Terms of Coastal Transportation)

  • 신창훈;정수현;박수남
    • 한국항해항만학회지
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    • 제34권3호
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    • pp.221-228
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    • 2010
  • 컨테이너 물동량 증가와 함께 선박의 대형화는 항만과 터미널 운영에 많은 영향을 주었고, 선사들의 운송네트워크들은 점차 hub-and-spoke방식으로 변하고 있다. 이는 항만간 치열한 경쟁을 초래하였고 그로 인해 새로운 항만을 개발하거나 기존 항만을 확장해야 하는 압력들을 받아왔다. 그러나 항만 개발에 따른 환경적 물리적 재무적 한계를 극복하기에는 너무나 많은 비용과 시간의 투자를 요구하고 있다. 그래서 본 연구에서는 하나의 대안으로서 새로운 해상 운송시스템인 모바일하버를 다루었다. 그리고 컨테이너 연안운송시장을 중심으로 모바일하버 도입에 대한 경제적 분석과 함께 관련 요인들의 변화들에 대한 민감도 분석도 같이 수행하였다. 본 연구는 모바일하버의 가치와 활용방안에 대한 기초 연구로서 추후 관련 연구들에 대해 기여하고자 하였다.

공간지각에 있어 잉여정보의 의미와 분석 - NOX의 공간을 중심으로- (The Concept and Analysis of Redundant Information in Space Perception - Focused on the Works of NOX -)

  • 김주미
    • 한국실내디자인학회논문집
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    • 제15권6호
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    • pp.77-88
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    • 2006
  • According to critics and architects, non-linear structure is not only an organic form of space, but also a form of space detached from modem style. Accordingly, non-linear structure can be accepted as an alternative to what has remained unsolved by deconstructionist. However, they are criticized for not clarifying the interdependent relationship between non-linearity of space and cognitive structure of human being. They ended up remaining the hypothesis just an intuitive and abstract one. This research began on the basis that their hypothesis is hard to be objectified, and it needs further inquiry. The purpose of this thesis is to explore how the redundant factors constitute non-linear structures of digital media centered space design. Geometric compositions of space structure were analyzed to define what types of redundant factors are contrived in the process of visual information. This study about the visual form, researching the Information Theory, and then offer a quantitative analysis that makes those more objective. Space structure and geometric composition were analyzed to define what types of redundancy are contrived in the process of visual information. In particular, I put higher theoretical emphasis on what characteristics are ensued in the process of structuring spaces than any other subjects. Followings are the conclusion of analysis. First, as a result of examining, we can assume that NOX' space structure is not a chaotic form, but has an operating the form of its own. Second, in case of curvilinear, the structure was found redundancy on mid deviation ratio and discontinuous circular fabric. Although most of their structures appeared complex with a higher coherent constant, they were found to be stable factors because of the low deviation ratio between systems. The amount of surplus information was stable structure as well.

A Study on the Characteristics and Social Values of Vegan Fashion in H&M and Zara

  • Seo, Kyoungah;Suh, Seunghee
    • 패션비즈니스
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    • 제23권6호
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    • pp.86-100
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    • 2019
  • This study analyzed the characteristics of vegan fashion produced by H&M and ZARA with respect to materials, design, development, production, and marketing to create social value. The results of this study are significant because they can be used as a reference to develop a vegan fashion market. Regarding the research method, this study assessed the concept and status of veganism through a literature review and examined vegan fashion case studies by analyzing official websites and media content. The study's scope covers the period from 2005, when H&M was the first SPA brand to create a vegan product line, until 2019. The characteristics of Global SPA's vegan fashion were as follows. Regarding materials, alternative materials were developed and an expanded use of organic materials was implemented. Regarding design, development was achieved through design collaboration and upcycling. In terms of production, an animal welfare policy was adopted and a sustainable supply chain was established. Marketing employed a campaign aimed at encouraging increased consumer participation. The findings regarding the social value of H&M and Zara's vegan fashion were as follows. First, a cyclical economy was realized through circular recycling in the entire process of resource selection, production, and waste disposal. Second, because product consumption indicated the importance of ethical consumption and sustainable consumer participation, corporate financial activities were created based on shared values to accomplish the social outcome. Third, collaborations with luxury brands or vegan fashion designers built a collaborative ecosystem in which vegan fashions were released and consumer participation campaigns were implemented.

고성능 고체산화물 연료전지를 위한 이중층 전해질 전략 (A brief review of the bilayer electrolyte strategy to achieve high performance solid oxide fuel cells)

  • 박정화;김도엽;김경준;배경택;이강택
    • 세라미스트
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    • 제23권2호
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    • pp.184-199
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    • 2020
  • The solid oxide fuel cells (SOFCs) are the one of the most promising energy conversion devices which can directly convert chemical energy into electric power with high efficiency and low emission. The lowering operating temperature below 800 ℃ has been considered as the mostly considerable research and development for commercialization. The major issue is to maintain reasonably high performance of SOFCs at reduced temperatures due to increment of polarization resistance of electrodes and electrolyte. Thus, the alternative materials with high catalytic activities and fast oxygen ion conductivity are required. For recent advances in electrolyte materials and technology, newly designed, highly conductive electrolyte materials and structural engineering of them provide a new path for further reduction in ohmic polarization resistance from electrolytes. Here, a powerful strategy of the bilayer concept with various oxide electrolytes of SOFCs are briefly reviewed. These recent developments also highlight the need for electrolytes with greater conductivity to achieve a high performance, thus providing a useful guidance for the rational design of cell structures for SOFCs. Moreover, cell design, materials compatibility, processing methods, are discussed, along with their role in determining cell performance. Results from state-of-the-art SOFCs are presented, and future prospects are discussed.