• Journal of Korean Society of Transportation
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• v.27 no.6
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• pp.109-118
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• 2009

The conventional lane changing model has been developed without acceleration or deceleration of vehicles at target lane. Thus, existing lane changing models have limitation to apply in real world. In this paper, lane changing model considered acceleration or deceleration, and calculated the safety distance between subject vehicle and adjacent vehicles for lane changing as well. Simulation was conducted to verify the validity and the efficiency of the developed lane changing model in this paper. Several scenarios were carefully examined by safety distance between subject vehicle and adjacent vehicles. In the result, it was verified that if gap between subject vehicle and adjacent vehicles is larger than safety distance, lane changing behavior between subject vehicle and adjacent vehicles avoids collision. The suggested lane changing model may be applied at the future driver assistance system and advanced safety vehicle.

• Archives of design research
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• v.15 no.3
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• pp.201-212
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• 2002

This thesis is to study about The Issue of Treating Information, according to the circumstance of Digital Media in Contemporary Design. The Digital Design is being able to be organized by developed Science and Technology. Ultra fashionable mode of digital design is leading human life more comfortable and serviceable: and proceeded by technology aheaded by science Developed Computer will help the Space science and virtual reality. and They will lead more developed industrial culture. The design is influencing international society and economic circumstance, and it's making the changedness of product and commercial route. virtual reality and simulation made by developed science is resulting in new design revolution in our society. Especially, it is able to make more bigger result in image breaking and reassimilation. The technology of developed information treating infra is able to transmit & receive a message, which are beyond our sensual boundary and is the meaning of the human-being's progressive development of science culture. Developed information treating methodology made by technology and science of restoration will be Neo-reality for artists and are the cause of great changedness in 21st century's art & design.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.54 no.4
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• pp.418-425
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• 2021

The effects of an aquaponic system based on biofloc technology (BFT-AP) were analyzed for eel Anguilla japonica as aquaculture species and caipira Lactuca sativa as the cultivated crops. The rate of weight gain rate by the eels was 178% (BFT-AP 200 head) > 136% (BFT-AP 100 head) > 100% (BFT). The eel body weight in the BFT-AP (200 head) significantly increased when compared to the BFT only eel group (P<0.05). The weight of the upper layer of caipira was 91±8.5 g (200 head) > 90±8.9 g (100 head) > 48±8.3 g (Hydroponic crop, HP). The crop growth in all BFT-AP groups was higher than the control, the hydroponic group. The total ammonia nitrogen (TAN) and NO₂^--N concentrations decreased in the BFT-AP group when compared to the BFT group. It was possible to remove nitric acid from the aquaponics system and reuse it as eel rearing water. Although some nutrient concentrations were low in BFT when compared to HP, the nutrient concentration was sufficient for plant growth. The results show that BFT has the potentially to provide a sustainable aquaponic system.

• JOURNAL OF ELECTRICAL WORLD
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• s.438
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• pp.24-29
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• 2013

• Journal of the KSME
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• v.41 no.1
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• pp.53-56
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• 2001

• Information and Communications Magazine
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• v.33 no.4
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• pp.27-33
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• 2016

자율 주행(스마트) 자동차는 첨단 IT기술을 이용하여 사람의 개입을 줄여서 운행하는 자동차를 말한다. 자율 주행(스마트) 자동차는 자율적으로 차량 주변 환경 및 상황을 판단하여 정해진 목적지까지 안전하게 이동하는 차량을 의미한다. 자율 주행(스마트) 자동차는 주행 안전성과 운전자의 편의성을 향상시키기 위한 연구 형태로 주로 이루어지고 있다. 자율 주행(스마트) 자동차 기술은 자율 주행의 정도를 적용하여 단계별로 개발이 진행될 것으로 보인다. 자율 주행 자동차 기술은 인간 세상에 또 다른 변혁을 몰고 오고 있다. 자율 주행 자동차와 관련한 기술은 첨단 IT기술을 기계 자동차에 접목하는 것인데, 적용하는 IT 기술은 HW, SW기술로 나눌 수 있다. IT HW 기술로는 환경 인식에 필요한 HW, 위치 인식 HW, 판단/제어를 위한 여러가지 센서 HW 등이 있다. IT SW 기술로는 IT HW를 구동하기 위한 실시간 OS, IT HW 전장장치를 구동할 수 있는 여러가지 SW 관련 기술, 자율 주행을 위한 경로 알고리즘 등이 있다. 본 고에서는 자율 주행 자동차에 적용되는 IT SW 기술 중심으로 살펴본다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.10a
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• pp.737-739
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• 2015

The purpose of this study is to investigate the effect of brand image and purchase attitude on IT new and high tech product(and service). These results of the research model provide that the relationship between brand image and purchase attitude on IT new product. This study provide that the brand image is a tool for the firm's competitive power. The firms strengthen the brand image for a successful market entry.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.35 no.5
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• pp.516-521
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• 2022

We investigated the microstructure, crystal structure, dielectric, and elecromechanical strain properties of lead-free BaTiO₃ (BT)-modified (Bi_1/2Na_1/2)TiO₃-SrTiO₃ (BNT-ST) piezoelectric ceramics. Samples were prepared by a conventional ceramic processing route. Temperature dependent dielectric properties confirmed that a phase transition from a nonergodic relaxor to an ergodic relaxor was induced when the BT concentration reached 1.5 mol%, interestingly, where the average grain size reached a maximum value of 4.5 ㎛. At the same time, enhanced electromechanical strain (S_max/E_max = 600 pm/V) was obtained. It is suggested that the induced ferroelectric-relaxor phase transition by the BT modification is responsible for the enhancement of electromechanical strain in 1.5 mol% BT-modified BNT-ST ceramics.

• Journal of Sensor Science and Technology
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• v.31 no.3
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• pp.168-174
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• 2022

Hydrogen sulfide(H₂S) gas is a high-risk gas that can cause suffocation or death in severe cases, depending on the concentration of exposure. Various studies to detect this gas are still in progress. In this study, we demonstrate a colorimetric sensor that can detect H₂S gas using its direct color change. The proposed nanofiber sensor containing a dye material named Lead(II) acetate, which changes its color according to H₂S gas reaction, is fabricated by electrospinning. The performance of this sensor is evaluated by measuring RGB changes, ΔE value, and gas selectivity. It has a ΔE value of 5.75 × 10^-3 ΔE/s·ppm, showing improved sensitivity up to 1.4 times that of the existing H₂S color change detection sensor, which is a result of the large surface area of the nanofibers. The selectivity for H₂S gas is confirmed to be an excellent value of almost 70 %.

• Journal of the Korea Institute of Military Science and Technology
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• v.27 no.2
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• pp.304-310
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• 2024

Ricin is a highly toxic protein which is produced in the seeds of the castor oil plant. Ricin toxin A chain has ribosomal RNA N-glycosylase activity that irreversibly hydrolyses the N-glycosidic bond of the adenine residue at position 4324 within the 28S rRNA. In this study, we developed non-toxic recombinant ricin vaccine(R51) in E. coli expression system, and evaluated efficacy of the R51 according to adjuvants. When the R51 was administered using aluminum hydroxide as an adjuvant, the vaccine efficacy was higher than that of TLR agonists or aluminum phosphate. Because it is time-consuming to administer the vaccine three times at three-week intervals, we investigated the survival rate and antibody titer of mice according to the change of time interval of vaccination. Interestingly, there was no difference in survival rate and antibody titer when R51 was administered at 0, 1, and 3 weeks or 0, 2, and 4 weeks compared to when administered at 0, 3, and 6 weeks. Therefore, the developed R51 vaccine is promising to protect soldiers from Ricin attack.