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농촌지역의 생활폐기물 발생 특성 : 경북지역을 중심으로 Detailed Kyeongbuk Area
권기홍,조병락,전영국 영남이공대학 산업기술연구소 2003 産業技術硏究 Vol.15 No.-
This study was carried out to investigate the generation and physico-chemical composition of solid wastes in the Kyeongbuk area. As a result, the generation rate of municipal solid wastes(MSWs) in the Kyeongbuk area have been lower('96 : 43,757ton/day → '01 : 42,384ton/day), but recyclable wastes of them have been higher ('96 : 10,592ton/day →'01 : 12,828ton/day). The annual generation rate of MSWs in the country was 0.96kg in 1996, 0.92kg in 2001, respectively, it has maintained below 1.0kg, but it was 1.03kg in 1996, 0.94kg in 2001 in Kyeangbuk area, respectively. In MSWs, food wastes in the country and the Kyeongbuk area are 8,510kg and 493kg, and separation rate of food waste are 37.8% and 59.4%, respectively. Totally the generation rate of MSWs was decreased, but recyclable products of MSWs was increased. Three components, heating value, elements analysis in 2001 was similer to 1996's results.
황권태(Kwon-Tae Hwang),김재훈(Jae-Hoon Kim),이영신(Young-Shin Lee),박종호(Jong-Ho Park),권순국(Sun-Guk Kwon),송기혁(Kee-Hyuck Song),윤수진(Su-Jin Yoon),이기천(Gi-Chun Lee) 대한기계학회 2009 大韓機械學會論文集A Vol.33 No.11
Fracture characteristics for plate and dome shapes of glass filled ceramics using shock tube were carried out. Glass filled ceramics have been considered as a promising candidate material for the dome port cover of air breathing engine. This part of the air breathing engine has an important role as separated membrane between combustion and external air, and needs the frangible characteristics that the particles of fractured glass filled ceramics should not affect the internal components of combustion. The objectives of this study are to evaluate the fracture pressures for various thicknesses and diameters of shock impact area. Also fracture phenomena of separated membrane using a shock tube compare with analytical method. The experimental apparatus consists of a driver, a driven section and a dump tank. The used material is glass filled ceramic made from Corning company. Specimens have the thickness of 3, 4.5 and 6㎜. It is expected that the results obtained from this study can be used in the basic data for the dome port cover design of an air breathing engine.
초분광 반사 영상과 부분최소제곱회귀 모델을 이용한 우유 분말에 혼합된 미량 멜라민의 함량 예측
임종국 ( Jong Guk Lim ),김문성 ( Moon S Kim ),백인석 ( In Suck Baek ),모창연 ( Chang Yeun Mo ),이호영 ( Ho Young Lee ),강석원 ( Su Kwon Kang ),이강진 ( Kang Jin Lee ),김기영 ( Gi Young Kim ) 한국산업식품공학회 2013 산업 식품공학 Vol.17 No.4
Melamine has been reported to be responsible for kidney stones and renal failure among infants and children. Conventional detection methods, High-Performance Liquid Chromatography (HPLC) and Gas Chromatography (GC), are sensitive enough to detect trace amounts of the contaminant, but they are time consuming, expensive, and laborintensive. Hyperspectral imaging methods, which combine spectroscopy and imaging, can provide rapid and nondestructive means to assess the quality and safety of agricultural products. In this study, near-infrared hyperspectral reflectance imaging combined with partial least square regression analysis was used to predict melamine particle concentration in dry milk powder. Melamine particles, with concentration levels ranging from 0.02% to 1% by weight ratio (g/g), were mixed with dry milk powder and used for the experiment. Hyperspectral reflectance images in the wavelength range from 992.0 nm to 1682.1 nm were acquired for the mixtures. Then PLSR models were developed with several preprocessing methods. Optimal wavelength bands were selected from 1454.5 nm to 1555.6 nm using beta-coefficients from the PLSR model. The best PLSR result for predicting melamine concentration in milk powder was obtained using a 1st order derivative pretreatment with Rv2=0.974, SEP=±0.055%, and F=6.
( Chang Yeun Mo ),( Jong Guk Lim ),( Kang Jin Lee ),( Su Kwon Kang ),( Moon S Kim ),( Gi Young Kim ),( Byoung Kwan Cho ) 한국농업기계학회 2013 바이오시스템공학 Vol.38 No.4
Purpose: We developed a viability evaluation method for cucumber (Cucumis sativus) seed using hyperspectral reflectance imaging. Methods: Reflectance spectra of cucumber seeds in the 400 to 1000 nm range were collected from hyperspectral reflectance images obtained using blue, green, and red LED illumination. A partial least squares?discriminant analysis (PLS-DA) was developed to predict viable and non-viable seeds. Various ranges of spectra induced by four types of LEDs (Blue, Green, Red, and RGB) were investigated to develop the classification models. Results: PLS-DA models for spectra in the 600 to 700 nm range showed 98.5% discrimination accuracy for both viable and non-viable seeds. Using images based on the PLS-DA model, the discrimination accuracy for viable and non-viable seeds was 100% and 99%, respectively Conclusions: Hyperspectral reflectance images made using LED light can be used to select high quality cucumber seeds.