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윤예리,한기영,김정환,오세연,노봉수 서울여자대학교 자연과학연구소 2005 자연과학연구논문집 Vol.17 No.-
대두유를 160, 190, 220℃에서 가열하면서 3시간 또는 4시간 간격으로 시료를 취하여 6개의 metal oxide sensor로 구성된 전자코와 2세대 전자코인 GC-SAW를 바탕으로 한 전자코를 사용하여 분석하였다. 주성분 분석결과 가열처리시간과 온도가 증가할수록 제1 주성분 값이 감소하는 것을 볼 수 있었다. 즉, 초기의 열처리를 하지 않은 신선한 대두유와 가열처리된 대두유를 구분할 수 있었다. 특히 190℃와 220℃의 높은 온도에서는 3시간 내지 4시간이면 대두유의 산패가 많이 진행됨을 알 수 있었다. 또한 GC-SAW를 바탕으로 한 전자코를 이용한 결과도 가열온도와 시간이 증가할수록 peak의 수와 면적이 증가함으로써 열처리시간에 따른 패턴 변화를 확인할 수 있었다. 이것으로 대두유의 가열처리에 따른 산패취의 변화를 측정하기 위한 간단한 방법으로 사람의 코처럼 미묘하고 복잡한 향기와 냄새성분을 감지할 수 있는 전자코로 평가할 수 있음을 확인하였다. The discrimination of the heated soybean oil was investigated by using electronic nose. Volatile components from these products were discriminated by six metal oxide sensors. Principal component analysis showed the differences between non-heated soybean oil and heated soybean oil. The first principal component score in soybean oil was reduced from +0.369 score to -0.242 score as the heating time increased. As heating temperature increased, the ratio of resistance decreased, indicating that rancidity of soybean oil increased at high heating temperature. As an alternative, electronic nose based on GC with SAW(surface acoustic wave) sensor was used for discrimination of heated soybean oil. High resolution olfactory imaging, called VaporPrint^(TM), was shown to be particularly useful for evaluating oil quality in its entirety. The result of electronic nose showed significant changes in volatile profiles from soybean oil. Also, peak numbers and areas increased as high heating time and temperature. Analysis using electronic nose with pattern recognition was rapid and simple. And this technique could be an efficient method to predict shelf-life and evaluate quality in food.
“UAV Sensor Selection Based on Aerial Mapping Mission Specific Requirements”
Aye Aye Maw,Nguyen Le Viet Thang,Maxim Tyan,Jae-Woo Lee 한국항공우주학회 2016 한국항공우주학회 학술발표회 논문집 Vol.2016 No.4
System flexibility and efficient flight automation algorithms make UAV a popular platform for various aerial mapping applications. Small sized UAVs are the prior option for the most part of mapping applications due to low price and ease of operation. The use of UAVs for professional geographic information system or precision agriculture sets very strict requirements to image quality. The selection of appropriate image recording equipment becomes essential for providing the sharp images with high resolution. This paper describes the methodology for calculating the required flight conditions and mission efficiency of an existing electric UAV to satisfy the mission requirements. Scoring method is applied to select the required setup of a visual sensor.
Design of robotic gripping and cutting system for sweet pepper harvesting
( Aye Aye Thet ),( Yong-tae Kim ) 한국농공학회 2018 한국농공학회 학술대회초록집 Vol.2018 No.-
Automation is one of the most important operations for every fields .Today, agricultural field is gradually tend to automation .This study represents a suitable design and modeling basic gripper and cutter for harvesting horticulture fruits. This research is aimed for labor reduction, cost saving, less damages etc.; of farm products. Harvesting horticulture fruits like sweet pepper is a time-consuming, laborious task. Imagine if a robot could be designed that would not only know which sweet pepper is ready for picking and which isn’t, but would also have the ability to gently grasp the fruit and remove it from the stem without damaging the fruit.Firstly, the proposed modeling was selected appropriate design and the design have pin type gripper are driven with the aid of dynamixel servo motor .For cutting tool system which was composed of scissor, another dynamixel servo motor with the same power was applied to work .The parts of the system was drawn by Solidworks and consider and checked for various actions and printing the sketched modeling by using 3D printer. Designing an autonomous gripper and cutter was accompanied by physical dimensions and parameters. Based on the design concept,the actual prototype of the gripping and cutting tool system must be tested in field condition. This study can support in agricultural field to substitute the reduction of labor, cost saving, less damages of horticulture fruits.
Aye Aye Maw,Jung II-Shu(서정일),Jin Wook-Kim(김진욱),Thawdar Lwin,Jae-Woo Lee(이재우),Sangho Kim(김상호) 한국항공우주학회 2015 한국항공우주학회 학술발표회 논문집 Vol.2015 No.11
This paper describes a framework development using system engineering concept for various space launch vehicles to assist engineers during system synthesis and simulation design process. This design framework consists of many different functions and capabilities: data analysis of each module, sequential optimization of each module, entire optimization of all modules and configuration 3D modeling of final target space launch vehicle. Additionally, the tool was designed to accept and save input values from users, and run the optimization after being prepared. Alternatively, the user can load and run system-default values to know how exactly the framework works. Furthermore, this paper describes the implement and deployment of aerospace design frameworks of a unique platform. The various analysis codes, optimization codes, MATLAB, FORTRAN, 3D modeling using CATIA v5, and a database management system are integrated into the frameworks. With this space launch framework, the system synthesis and simulation design for the rocket system targeted on the 700 x 700 km circular orbit has been successfully performed to demonstrate the efficiency of the framework.