• Transactions of the Korean Society of Automotive Engineers
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• v.20 no.3
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• pp.13-19
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• 2012

The fatalities rate for passenger vehicles, vans, and commercial vehicles is 1.23, 1.90 and 2.46 deaths per 10,000 registered vehicles, respectively. This shows that vans and commercial vehicles are vulnerable compare to passenger vehicles. To evaluate the crashworthiness of van and Light Truck Vehicle(LTV), we carried out frontal offset crash test at 64km/h, 40% overlap as per IIHS(Insurance Institute for Highway Safety). The test result show that LTV is very poor to protect occupant at frontal crash cause there is no safety system such as airbag and pretensioner and front end length(distance from front bumper to steering wheel) is short. One of the van rated as the lowest rating even it is equipped with airbag, cause its safety cage was collapsed during the test. This result shows that the structural integrity is very important in terms of occupant protection.

• 한국벤처창업학회:학술대회논문집
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• 2016.04a
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• pp.88-92
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• 2016

2008년 글로벌 금융위기 이후 세계 주요 국가들은 이러한 상황의 생존전략으로 창업 및 기업가정신의 부활을 강조하고 있다. 우리나라도 경기침체 및 청년실업률 증가와 같은 장기불황을 극복하기 위해 '국민행복, 희망의 새 시대'라는 국정비전하에 '일자리 중심의 창조경제' 실현을 제1의 국정목표로 설정하였다. 2016년 4년차에 접어드는 창조경제는 수많은 예산과 인력을 투입하여 창업지원사업을 하고 있지만, 그 효과성에 대해서는 의문이 든다. 이에 본 연구는 실제 창업을 하거나 준비 중인 창업가, (예비)창업가, 학생을 중심으로 현 창업생태계의 문제점을 분석하였고, 이 분석결과를 토대로 정부, 지방자치단체 및 민간의 창업지원사업에 바람직한 지원방향을 제시하여 건강한 창업생태계 구축을 위한 방안을 제시하고자 한다. 분석결과, 정부의 창업지원 정책의 문제점은 보겨 주기식 창업지원사업 및 행사라고 응답한 비율이 41.5%로 가장 높은 응답률을 보였고, 국내 창업생태계 조성을 위해 제 역할을 충분히 하지 않은 당사자는 34.1%가 중앙정부, 28.3% 국내 대기업이라고 응답하였다. 창업경험 유무에 따른 창업과정의 애로사항은 자금조달이 46.1%로 가장 높았고, 창업 초기자금 조달방법은 응답자의 절반인 50.4%가 개인자금으로 창업 초기자금을 조달한다고 응답하였다. 창업이 주저되는 주요 이유로는 창업자금 마련 및 기회비용이 40.4%로 가장 높은 응답률을 보였고, 창업 시 가장 필요하고 중요하다고 생각되는 지원정책으로는 자금 및 투자 지원이 26.6%, 사무실공간지원 13.5%, 마케팅 및 판로 지원이 13.5%의 응답률을 보였다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.20 no.2
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• pp.141-147
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• 2020

We studied for GPU based signal processor for naval multi-function radar. We implemented processing software both DSP and GPU, and compared computation performances and power consumption. As a result, computation performance was enhanced from 1.2 to 4.1 times compared with a DSP result. From the results, GPU can alternating DSP based signal processor for common radar processor even though Naval Multi Function Radar.

• Transactions of the Korean Society of Automotive Engineers
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• v.18 no.2
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• pp.31-38
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• 2010

Bus manufacturers have tested and studied the dynamic collapse behavior of a bus body structure in rollover since UN ECE established ECE Regulation 66 to provide the requirement for the strength of bus structure. In spite of the costly cycles of practical tests, however, it is still a hard task to meet the rollover regulation by means of local reinforcements in the bus structure. Therefore it is necessary to develop a well designed strategy for the rollover strength implemented in the early stage of vehicle development. In this study, the suitable development method for each design stage from a component to complete body structure was considered to make a well-established development process of a bus body structure for rollover safety. For the efficient approach of the concept design stage, a numerical model based on the plastic hinge theory was used instead of detailed shell models. After setting up the concept design for the component size and geometry, the shell model was used to confirm and optimize the whole structure composition. The process developed in this study was practically used as an effective method to predict the rollover behavior of a new bus body structure.

• KIISE Transactions on Computing Practices
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• v.21 no.1
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• pp.58-63
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• 2015

In this work, we present a novel fountain code-based hybrid P2P storage system that combines cloud storage with P2P storage. The proposed hybrid storage system minimizes data transmission time while guaranteeing high data retrieval and data privacy. In order to guarantee data privacy and storage efficiency, the user transmits encoded data after performing fountain code-based encoding. Also, the proposed algorithm guarantees the user's data retrieval by storing the data while considering each peer's survival probability. The simulation results show that the proposed algorithm enables fast completion of the upload transmission while satisfying the required data retrieval and supporting the privacy of user data under the system parameters.

• Transactions of the Korean Society of Automotive Engineers
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• v.15 no.1
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• pp.56-63
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• 2007

In case of bus rollover, the body structure of the bus should be designed to ensure the survival space for passengers. So, this study focuses on evaluating rollover strength through a computer simulation using the commercial code, LS-DYNA3D at the initial stage of vehicle development. For this study, section structure was modeled using a simple beam element, and impact boundary conditions required by ECE(Economic Commission for Europe) regulation No.66 were applied. In order to confirm the validity of the beam element bus model, the results compared with the test results and shell element bus model. The analysis errors from beam element bus model are due to the difference in strain energy of joint area between beam and shell model. In this study, a method for the joint modeling was suggested by using nonlinear springs to which the collapse mechanisms were applied.

• Proceedings of the Korea Water Resources Association Conference
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• 2015.05a
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• pp.374-374
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• 2015

최근 이상기후로 인한 홍수, 산사태 등 자연재난 및 각종 사건사고 등 사회적 재난에 따른 인명 피해가 매년 증가하고 있는 추세이다. 특히, 재난에 대한 노출도가 높고 재난이 빈번하게 발생하는 일본, 미국과 달리 높지 않은 우리나라의 경우 실제 재난상황에 직면할 경우 상대적으로 낮은 생존율을 보이고 있으며 이러한 대표적인 사례가 바로 올해 발생한 세월호 침몰사고에 따른 인명 피해를 들 수 있다. 이에 사후약방문식으로 많은 전문가들이 체계적인 대응 매뉴얼 부재, 정부의 일사분란한 대응의 부족을 언급하고 있는 실정이나 정작 재난에 직면한 일반 국민들이 평상시에도 이해하기도 힘든 매뉴얼의 대응수칙을 재난상황에 따를 수 있을 것이라고 생각하는 것은 "재난에서 재난을 배울 수 없는" 우리나라의 현주소 그 자체를 보여주는 것이라 할 수 있다. 이와 같은 문제점을 해결하기 위해서는 재난 발생시 신속한 대응이 가능한 수준의 직관적 재난대처 요령을 국민들에게 알려주는 것이 무엇보다 요구된다 할 수 있다.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.518-518
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• 2022

오늘날 우리사회는 환경변화와 기후 위기 가속화로 인하여 삶의 질 악화는 물론 인류 생존까지도 걱정해야 시기에 이르렀는데, 이러한 변화의 주범인 온실가스의 75%가 도시에서 발생되고 있다(Global Sustainable Development Repor, 2019), 이에 국제 사회는 도시 중심의 녹색 전환 정책 추진 중인데, 우리나라는 2017년부터 '도시재생뉴딜사업'을 추진하고 있다. 이에 본 연구는 지자체가 주도적으로 환경성과 창출 방안을 마련, 도시의 지속가능성 높이는데 일조하고자 탄소중립 선도 도시 사례와 도시재생의 문제점을 살펴봄으로써 도심 내 과밀화 문제와 탄소배출 해결 방안을 제시하였다. 당초 '도시재생뉴딜' 사업은 도시의 다양한 니즈를 충족시키기 위하여 시작되었으나, 최근에는 도시 노후화와 탄소배출 문제에 대응하기 위하여 '그린도시', '친환경 도시'를 지향하고 있다. 그러나 이를 뒷받침할 법·제도의 제·개정 및 이를 바라보는 이해관계자의 시각 전환이 이루어지지 않아 크고 작은 많은 문제점이 발생하고 있다. 도시재생의 첫 번째 문제점은 정책지원의 30% 이상이 일반근린형에 집중됨에 따라 주거형 도시재생 양상을 띄고 있다는 점이다. 이는 임기가 제한된 지자체장이 가시적인 성과를 위하여 도시 내 인프라 확충에 집중한 결과로 지속가능한 도시재생을 저하시키는 요인이 되고 있다. 두 번째, 도시재생 뉴딜사업이 계획수립과정에서 지속가능성에 대한 검토와 환경성 평가에 대한 고려 부족으로 기후 위기 대응에 미흡한 실정이다. 노후 도시의 주거 과밀화 문제를 해결하고 효과적인 도시 탄소 감축을 위하여 건물 - 마을 - 도시 등 여러 공간 단위의 온실가스 배출량 감축 전략 수립이 필요하다. 세 번째, 치·이수 위주의 도시재생 뉴딜사업으로 탄소 중립 대책이 미흡하다. 대응 방안으로는 자원의 관점에서 물 소비 감소 촉진 및 재생에너지 증가 전략이 필요하다.

• Korean journal of applied entomology
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• v.61 no.4
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• pp.605-614
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• 2022

Two major problems currently threaten human survival on Earth: climate change and the rapid aging of the population in developed countries. Climate change is a result of the increase in greenhouse gas (GHG) concentrations in the atmosphere due to the increase in the use of fossil fuels owing to economic and transportation development. The rapid increase in the age of the population is a result of the rise in life expectancy due to the development of biomedical science and technology and the improvement of personal hygiene in developed countries. To avoid irreversible global climate change, it is necessary to quickly transition from the current fossil fuel-based economy to a zero-carbon renewable energy-based economy that does not emit GHGs. To achieve this goal, the dairy and livestock industry, which generates the most GHGs in the agricultural sector, must transition to using low-carbon emission production methods while simultaneously increasing consumers' preference for low-carbon diets. Although 77% of currently available arable land globally is used to produce livestock feed, only 37% and 18% of the proteins and calories that humans consume come from dairy and livestock farming and industry. Therefore, using edible insects as a protein source represents a good alternative, as it generates less GHG and reduces water consumption and breeding space while ensuring a higher feed conversion rate than that of livestock. Additionally, utilizing the functionality of medicinal insects, such as silkworms, which have been proven to have certain health enhancement effects, it is possible to develop functional foods that can prevent or delay the onset of currently incurable degenerative diseases that occur more frequently in the elderly. Insects are among the first animals to have appeared on Earth, and regardless of whether humans survive, they will continue to adapt, evolve, and thrive. Therefore, the use of various edible and medicinal insects, including silkworms, in industry will provide an important foundation for human survival and prosperity on Earth in the near future by resolving the current two major problems.

• Archives of design research
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• v.18 no.4 s.62
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• pp.185-194
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• 2005

In the perspective of hybrid, design contains confused forms and styles. Thus, the question is what 'decisively affects' on life, happiness and peace of human beings: In the past scientific ecology that tries to solve the problem in the aspect of functional design was important. Now the question is beyond the scientific ecology because human has a different way of environmental adaptation from animals. From this point of view, design is defined as something beyond materialistic standard. Terry Eagleton said, 'Creative ability deviating oneself and transcending is the very standard to measure human beings' A tendency to hybridize one's own section off genre or pursuing dismantlement is found on such creative perspective. In other words, it focuses on making a space of human's cultural behavior by unifying creatively natural environment and architecture space in the organic aspect. Such phenomenon provides a new chance and possibility in environmental design through a new molding experiment according to the development of digital technology. As experiments of environment design using digital technology are actively implemented, ecological and cultural views hybridize to create a new cultural space of various functions and features. Such experiment in environment design highlights the connections of ecological view, recognition of value, and relation-centered ideas, and enables a tool pursuing a new cultural development. This study focuses on the paradigm of such digital hybrid design and purposes to set the system by analyzing the application styles and principles of environment design through theoretical and case studies. In addition, it promotes a new possibility to develop environment design in the history of civilization.