• 한국식품과학회지
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• 제30권5호
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• pp.1051-1057
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• 1998

영지, 참깨, 칡과 같은 특용작물의 수입산 또는 국내산인지의 여부를 확인하기 위하여 전자코를 사용하였다. 특용작물이 배출하는 가스성분을 아무런 전처리 과정 없이 12개의 conducting polymer sensor로 감지하고 여기서 얻어진 자료를 판별분석을 통하여 특용작물의 원산지가 수입산 또는 국내산인지를 판별할 수 있었다. 원산지를 모르는 시료(영지, 참깨)를 분석한 결과 이들 농산물이 수입산인지 국내산인지를 뚜렷하게 구별할 수 있었다.

• 센서학회지
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• 제22권4호
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• pp.286-291
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• 2013

This paper presents to analyze patterns from single and complex malodors using gas sensor array based on metal oxide semiconductors. The aim of research is to identify and discriminate single malodors such as $NH_3$, $CH_3SH$ and $H_2S$ and their mixtures according to concentration levels. Measurement system for analyzing patterns from malodors is constructed by an array of metal oxide semiconductor sensors which are available commercially together with associate electronics. The patterns from sensory system are analyzed by Principal Component Analysis (PCA) which is simple statistical pattern recognition technique. Throughout the experimental trails, we confirmed the experimental procedure for measurement system such as sensors calibration time and gas flow rate, and discriminated malodors using pattern analysis technique.

• 한국기계가공학회지
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• 제21권1호
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• pp.41-48
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• 2022

Vehicle vibration was introduced in the time and frequency domains using fast Fourier transform (FFT) analysis. In particular, a vibration mode analysis and characteristics of the frequency response function (FRF) in a sport utility vehicle (SUV) passing over a bump barrier at different speeds was performed systematically. The response behavior of the theoretical acceleration was obtained using a numerical method applied to the forced vibration model. The amplitude and frequency of the external force on the vehicle cause various power spectra with individual intrinsic system frequencies. In this regard, several modes of power spectra were acquired from the spectra and are discussed in this paper. The proposed technique can be used for monitoring the acceleration in a vehicle passing over a bump barrier. To acquire acceleration signals, various experimental runs were performed using the SUV. These acceleration signals were then used to acquire the FRF and to conduct mode analysis. The vehicle characteristics according to the vehicle condition were analyzed using FRF. In addition, the vehicle structural system and bump passing frequencies were discriminated based on their power spectra and other FRF spectra.

• International Journal of Industrial Entomology and Biomaterials
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• 제45권2호
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• pp.49-55
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• 2022

A total of 20 mulberry varieties preserved in Korea were typed for eight polymorphic microsatellite loci. We obtained 6 to 15 alleles per locus with an average value of 10.6, per-locus observed heterozygosity ranging from 0.35 to 1.00, and per-locus polymorphic information content (PIC) ranging from 0.61 to 0.87, indicating that most loci are highly variable. Phylogenetic analysis using the eight microsatellite loci was sufficiently suitable for classifying 20 mulberry varieties preserved in Korea. A total of 160 variety-specific apomorphic alleles were obtained from eight loci discriminated 20 mulberry varieties. These variety-specific alleles from this analysis are expected to be useful for the discrimination of other mulberry varieties. Furthermore, a substantial number of homozygote loci, represented by 60 among 180 alleles in eight loci were found. These results collectively suggest that these microsatellite locus primers are potentially crucial molecular markers for the eventual classification of mulberry varieties that are preserved as hundreds in Korea.

• 한국식생활문화학회지
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• 제22권4호
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• pp.462-467
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• 2007

어육장과 시중 판매되는 소스의 휘발성 향기 성분들을 GC-SAW 전자코를 이용하여 분석하였다. 어육장은 담그고 1년 동안 발효${\cdot}$숙성 하면서 2개월 간격으로 액체부분만 취해서 분석하였고 숙성 1년이 지난 후에는 가열을 하였다. 소스는 주 원료가 다른 6종을 구입하여 시료로 이용하였다. 발효${\cdot}$숙성이 진행됨에 따라 어육장의 휘발성 향기 성분은 감소하였으며 숙성 후 가열 처리 한 결과 초기 머무름 시간에서 새로운 peak가 여러 개 생성 또는 증가함을 보였다. 쇠고기 추출물, 가쓰오부시, 멸치액젓이 주원료인 소스는 전자코 분석 결과 주 원료에 따라 peak의 분포와 면적의 크기가 서로 다른 패턴을 보였으며, 이는 어육장의 최종 시료와도 달랐다. 어육장과 소스의 향기 성분을 머무름 시간에 따라 주성분 분석을 하여 원료에 따른 향기 패턴에 차이가 있음을 나타내었으며 어육장은 제조 시 사용된 재료로 인하여 쇠고기와 멸치액젓이 주 원료인 소스 사이에 제 1주성분값이 나타났다. 이는 식품의 복잡하고 미묘한 향만을 객관적으로 관찰 한 것으로 향후 맛의 차이에 대한 연구도 병행되어야 할 듯 하다.

• 동아시아식생활학회지
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• 제16권6호
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• pp.717-723
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• 2006

Chemical characteristics of soybean oil after deep-frying with potato sticks (200 g, 10% w/w of soybean oil) were studied according to the 34 deep-frying times. After consecutive 34 deep-frying, total polyunsaturated FA contents was gradually decreased while the total saturated FA and trans FA were increased. Acid value and peroxide value were increased while iodine value decreased, respectively. The Hunter $L^{\ast}$ value decreased while each $a^{\ast}\;and \;b^{\ast}b$ value were gradually increased. Electronic nose equipped with 12 metal oxide sensors was used for the discrimination of odor pattern of frying oils against the times of deep-trying. The proportions of 1st and 2nd principal component analysis showed 75.97% and 21.23%, respectively. While 6 among total 12 sensors well responded to discrimination of odor in the repented frying oils, suggesting that the odor pattern of each oil after deep-frying would be discriminated against fresh soybean oil, especially after 14 times. From the results, electronic nose could differentiate the degree of quality deterioration of the repeated deep-frying oils.

• 패션비즈니스
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• 제10권5호
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• pp.105-121
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• 2006

Body measurement was first made with the subjects of 193 males in their 20s residing in the Ningbo area, Zhejiang Province in China. In this first report, lower body shapes were classified and discriminated by using anthropometric measurement indices and lower body analysis. The following sums up the research: 1. Compared with the average values of Korean males in their 20s, the Chinese subjects were characterized with thinner waist, more flat hip, and smaller midthigh. 2. The subjects of Chinese males in their 20s showed three types of lower bodies: H-Round Type (25.91%)-thick waist-abdomen, round cross-section waist-abdomen, and small waist-hip difference. A-Trapezoid Type (34.72%)-small width of omphalion waist-abdomen, average cross-section waist-abdomen, and large waist-hip difference. A-Balance Type (39.38%)-average width of omphalion waist-abdomen, flat cross-section waist-abdomen, and large waist-hip difference. 3. Seven useful variables for the categorization of the subjects' lower body types were chosen through stepwise discriminant analysis, and the hit ratio of discrimination was 96.89%.

• 산업경영시스템학회지
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• 제33권4호
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• pp.69-78
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• 2010

Multi-criteria ABC inventory classification is one of the most widely employed techniques for efficient inventory control, and it considers more than one criterion for categorizing inventory items into groups of different importance. Recently, Ramanathan (2006) proposed a weighted linear optimization (WLO) model for the problem of multi-criteria ABC inventory classification. The WLO model generates a set of criteria weights for each item and assigns a normalized score to each item for ABC analysis. Although the WLO model is considered to have many advantages, it has a limitation that many items can share the same optimal efficiency score. This limitation can hinder a precise classification of inventory items. To overcome this deficiency, we propose a context-dependent DEA based method for multi-criteria ABC inventory classification problems. In the proposed model, items are first stratified into several efficiency levels, and then the relative attractiveness of each item is measured with respect to less efficient ones. Based on this attractiveness measure, items can be further discriminated in terms of their importance. By a comparative study between the proposed model and the WLO model, we argue that the proposed model can provide a more reasonable and accurate classification of inventory items.

• 한국의류학회지
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• 제21권2호
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• pp.442-454
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• 1997

The purpose of this study was 1) to identify the effects of lifestyle activities and decision -making related variables (shopping orientations, use of information sources and importance of store attributes) on the outshopping behavior of female consumers in Seoul and satellite cities, and 2) to investigate the differences in the effects of those variables on the outshopping behavior among 4 clothing categories (formal wear, separates, casual wear, underwear). The data were collected via a questionnaires from 508 adult females of ages over 20's living in Seoul and satellite cities around Seoul and were analyzed by factor analysis and discriminant analysis. The results of this study were as follows: 1) Some of the factors of 4 decision-making related variables significantly discriminated the outshoppers and inshoppers. The most influential factors were attitude toward imported products, time-oriented and price-oriented attitude of shopping orientations. 2) There were significant differences in the effects of 4 variables on outshopping behaviors among 4 clothing categories. More factors were effective in discriminating the outshopping behavior for formal wear or separates purchase.

• Asian Journal for Public Opinion Research
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• 제8권3호
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• pp.377-392
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• 2020

COVID-19 is considered the worst pandemic of the beginning of the 21^st century. Among the ASEAN countries, Indonesia has the second highest number of active cases and is ranked 23^th in the world in active cases as of August 14, 2020. The number of people becoming infected in Indonesia continues to grow along with fear and panic conditions that have negative impacts on Indonesian society. Therefore, efforts to deal with the conditions should be made. This study aims to explore the experience of patients with COVID-19 experiences during the treatment process. This study used literature and video clip analysis of 14 cases. Data were analyzed using content analysis. The results were presented in the following five themes (i) experience of receiving a diagnosis (I am shocked, how could I get infected?, suggestive thinking between dead or alive, and uncertainty of the test result), (ii) boredom during isolation, (iii) being stigmatized and discriminated against, (iv) self-reflection with God, and (v) social support from family members and healthcare workers. This study serves as an input to increase the chances of the recovery of the patients with COVID-19.