• 한국자동차공학회논문집
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• 제18권5호
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• pp.9-19
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• 2010

Every car manufacturer desires to reduce the new car development time spent in improving the safety, NVH, lightweight, reliability and environment friendly features of the car. Other considerations such as planning, exterior and interior styling, packaging, color, and material selection increase the complexity of the car design process. This paper proposes a personal DDP (Digital Design Process) to utilize the engineering analysis and design/styling software for car design. DDP can be efficiently used by a team of car research center or a studio with small number of engineers, helping ordinary engineers becoming ambidextrous in design as well as engineering applications. The concept model starts from idea sketch, rendering, and 3D surface model with CAS (Computer Aided Styling) to the final safety estimation by using proposed DDP based on engineering technology (CAD, CAE). The concept model proposed a hydrogen fuel cell sports coupe which could be available within next 10 years. The proposed DDP can not only reduce the new car development time but also be adapted into designing of varied products such as aircraft, yacht, electrical equipment and sports gear.

• KIEAE Journal
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• 제5권1호
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• pp.19-25
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• 2005

Rapid urbanization and social development have brought about changes in family structure. In urbanized areas, recently the number of dogs that are a majority of companion animals has increased significantly in Korea. Consequently, a lot of friction between the general public who are not fond of dogs and dog owners in public places such as parks has been happening. A lot of countries that are taking a lead role in animal welfare have built dog parks that the general public and dogs can enjoy together. This research starts with the realization that the concept of 'dog park' needs to be introduced in Korea as more and more Koreans own dogs and other pets. This research aims to provide guidance for dog park planning by drawing planning items and analyzing the needs of each item. Total 56 planning items including dog zone, dog playground, and dog training facility, are drawn in this research. There are differences in the needs according to sex, age and the amount of time they spent with their dogs, however overall there is the highest needs in separated area for dogs in parks.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2022년도 추계학술발표대회
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• pp.815-817
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• 2022

This paper is about the development of an automatic stair climbing trolley for carrying loads without manpower. The design of tri-wheeled structure and center of mass enable the trolley to move on flat ground and also to ascend stairs by self-balancing. The overall design enables the trolley to avoid collision to walls when the trolley rotates on domestic landings. When the camera recognizes the stair, the sensor measures distance from the trolley to the stair. Then the trolley can move to align itself in the middle of the stair and it starts climbing. It can ascend to a specific floor based on the floor number entered by the user. As a result, the automatic stair climbing trolley is expected to help humans by protecting from accidents of dropping loads and saving their power. It is also expected to use for various purposes such as delivering packages, moving and carrying heavy loads in buildings without elevator.

• 원예과학기술지
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• 제30권5호
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• pp.613-616
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• 2012

The new Cymbidium variety 'Pink Glory' (Palace Court 'Jacky' ${\times}$ Lucky Rainbow 'Saint Rapine') was developed at the National Institute of Horticultural & Herbal Science, Rural Development Administration in 2006. A cross was made in 1995 between C. Palace Court 'Jacky' with a medium sized bright pink colored flowers, and C. Lucky Rainbow 'Saint Rapine' with pink colored flowers. In 1999, one line was selected based on the flower color, leaf shape, flower stalk, and vigorous growth. Evaluation and selection trials were conducted from 2000 to 2004. 'Pink Glory' has a light pink sepal (RHS, RPN66D), red lip (R52B) and a leaf length of 87.5 cm. The average number of flowers on each peduncle was 20.5 and the flower diameter was 8.6 cm. The general impression of petals and sepals showed some incurved and some spreading. 'Pink Glory' has a vigorous growth character and a rounded flower shape. It has an adequate peduncle height (66.5 cm) compared to leaf length (87.5 cm) and starts to bloom in late January under optimal cultural conditions.

• 정보처리학회논문지D
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• 제15D권2호
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• pp.257-262
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• 2008

본 논문에서는 음성통화를 위해 CDMA 네트워크와 데이터 통신을 위해 와이브로 네트워크를 동시에 사용하는 임베디드 리눅스 기반의 듀얼모드 응용 서비스인 개인 오디오 레코더의 구현에 대해서 기술한다. 개인 오디오 레코더는 듀얼모드 지원 단말에 탑재된 클라이언트에서 음성 녹음을 시작하면, 송신자와 수신자의 CDMA 음성 데이터가 와이브로 네트워크를 통해 인터넷 상의 저장 서버로 전달된다. 개인 오디오 레코더 서버는 통화 번호 및 통화 시간을 기준으로 음성 데이터를 서버에 저장하게 된다. 구현된 개인 오디오 레코더는 단말의 저장공간이 부족한 환경에서도 음성 통화 내용을 저장할 수 있도록 한다. 그리고, 개인 오디오 레코더는 서버에 저장된 통화 목록을 검색하여, 특정 통화 내용을 재생할 수 있다.

• 자원ㆍ환경경제연구
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• 제21권3호
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• pp.627-681
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• 2012

본 논문은 독점적 경쟁과 내생적 성장의 모형으로 시작하여 생산과정에 투입되는 생산요소로서 오염을 추가했다. 그리고 환경의 질이 생산에 사용되는 재생가능한 자원인 것으로 채택했다. 본 논문은 생산요소로서 청정 활동의 분화에 기인하는 수확체증이 환경의 질을 해치지 않고 지속가능한 성장을 이끄는 데 도움을 줄 수 있다는 것을 보였다. 또한 오염과 독점적 경쟁으로부터 발생되는 두 가지 왜곡들을 교정할 수 있는 서로 다른 여러 가지 정책조합(조세 +보조금)을 비교하고 평가했다. 끝으로 본 논문은 최종재 생산에 있어 환경의 생산성이 충분치 않을 경우에 청정재의 수는 더 많은 환경적 우려와 함께 증가하는 경향이 있다는 것을 찾아냈다.

• 생명과학회지
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• 제16권7호
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• pp.1195-1198
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• 2006

The importance of wild plant resources along with the development of high biotecyhnology is highlighted for exploitation of new materials which can make the added value. The goal of this study is providing fundamental data bases for developing new materials through the analyses of morphological characteristics, antibiotics and molecular cytogenetics in Baegseon (Dictamnus dasycarpus Turcz.). Baegseon has several characteristics; there are two types of flower color, pink and white, the seed germination starts about February 20th, the maximum flowering season is around May 17th in southern Korea, the growth period is about 60 days. The number of chromosomes are 2n=2x=36, the size of chromosomes in metaphase is $4.2{\sim}8.1{\mu}m$. The amount of 2C nuclear DNA is 1.93pg, and there is no variation of genome size amoung varieties. The extraction juice of baegseon young roots has the excellent antibiotic activity against the mold (Botrytis cinerea).

• 한국도로학회논문집
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• 제19권4호
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• pp.69-78
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• 2017

PURPOSES : In this study, we analyzed the road crossing behavior of older pedestrians on a mid-block signalized crosswalk, and compared it to that of younger pedestrians. In addition, we analyzed the correlation between accidents involving older pedestrians while crossing roads and their behavioral characteristics. Finally, we confirmed the reasons for an increase in accidents involving older pedestrians. METHODS : First, 30 areas with the highest incidence of accidents involving older pedestrians while crossing roads were selected as target areas for analysis. Next, we measured the start-up delay (the time elapsed from the moment the signal turns green to the moment the pedestrian starts walking) and head movement (the number of head turns during crossing a road) of 900 (450 older and 450 younger) pedestrians. The next step was to conduct a survey and confirm the differences in judgment between older and younger pedestrians about approaching vehicles. Finally, we analyzed the correlation between the survey results and traffic accidents. RESULTS : The average start-up delay and head movement of the older pedestrians was 1.58 seconds and 3.15 times, respectively. A definite correlation was obtained between head movement and the frequency of pedestrian traffic accidents. The results of our survey indicate that 17.3% of the older pedestrians and 7.8% of the younger pedestrians have a high crash risk. CONCLUSIONS : Behavioral characteristics of older pedestrians were closely correlated with accidents involving older pedestrians while crossing roads in mid-block signalized crosswalks. Our study indicates that in order to reduce the number of accidents involving older pedestrians, it is necessary to develop an improvement plan including measures such as installation of safety facilities taking the behavioral characteristics of older pedestrians into consideration and their safety education.

• 대한교통학회지
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• 제26권5호
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• pp.91-100
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• 2008

본 연구는 횡단보도 보행자 신호등의 녹색점멸신호 시작시점에 대하여 선호도 및 안전성을 조사 분석하고, 현행 보행자신호등의 운영 기준과 적용 방법 그리고 대안으로 제시되고 있는 국내 외 방안들에 대해 검토하여 최적의 개선방안을 도출하기 위해 시행되었다. 현재 많은 보행자들이 녹색점멸신호에 대한 이해가 부족한 가운데 도로의 횡단을 무리하게 시도하며 교통사고에 노출되고 있고, 점멸신호시 횡단하는 동안 불안감을 느끼고 있는 것으로 조사되어 보행신호등의 새로운 체계가 마련되어야 함을 시사하고 있다. 설문조사 결과, 보행자들은 현재 점멸신호가 너무 빨리 시작되고 있다고 응답하였고, 1/2 시점에서 점멸신호가 시작하는 방식을 선호하였다. 점멸신호 시작시점에 따른 보행자 위치별, 보행자의 정지위치별, 보행섬 설치 고려시 각각의 안전성 검토결과에서도 1/2시점 방식이 가장 안전한 것으로 나타났다. 현장실험 결과, 현행방식과 비교해 1/2 또는 2/3 시점 방식에서 점멸신호시 횡단을 시작하는 보행자 비율이 유의하게 줄어드는 것으로 나타났다. 그러나 녹색점멸신호를 2/3 시점에서 제시한 경우 적색신호에 횡단보도에 남아있는 보행자의 비율이 급격히 증가하는 것으로 나타나, 1/2 시점 방식이 가장 안전한 방법인 것으로 나타났다.

• 산업경영시스템학회지
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• 제42권4호
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• pp.194-202
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• 2019

Reliability analysis of the components frequently starts with the data that manufacturer provides. If enough failure data are collected from the field operations, the reliability should be recomputed and updated on the basis of the field failure data. However, when the failure time record for a component contains only a few observations, all statistical methodologies are limited. In this case, where the failure records for multiple number of identical components are available, a valid alternative is combining all the data from each component into one data set with enough sample size and utilizing the useful information in the censored data. The ROK Navy has been operating multiple Patrol Killer Guided missiles (PKGs) for several years. The Korea Multi-Function Control Console (KMFCC) is one of key components in PKG combat system. The maintenance record for the KMFCC contains less than ten failure observations and a censored datum. This paper proposes a Bayesian approach with a Dirichlet mixture model to estimate failure time density for KMFCC. Trends test for each component record indicated that null hypothesis, that failure occurrence is renewal process, is not rejected. Since the KMFCCs have been functioning under different operating environment, the failure time distribution may be a composition of a number of unknown distributions, i.e. a mixture distribution, rather than a single distribution. The Dirichlet mixture model was coded as probabilistic programming in Python using PyMC3. Then Markov Chain Monte Carlo (MCMC) sampling technique employed in PyMC3 probabilistically estimated the parameters' posterior distribution through the Dirichlet mixture model. The simulation results revealed that the mixture models provide superior fits to the combined data set over single models.