시각장애인을 위한 딥러닝 기반 음료수 캔 인식 시스템

이찬비,심수현,김선희 (사)디지털산업정보학회 2023 디지털산업정보학회논문지 Vol.19 No.1

Recently, deep learning has been used in the development of various institutional devices and services to help the visually impaired people in their daily lives. This is because not only are there few products and facility guides written in braille, but less than 10% of the visually impaired can use braille. In this paper, we propose a system that recognizes beverage cans in real time and outputs the beverage can name with sound for the convenience of the visually impaired. Five commercially available beverage cans were selected, and a CNN model and a YOLO model were designed to recognize the beverage cans. After augmenting the image data, model training was performed. The accuracy of the proposed CNN model and YOLO model is 91.2% and 90.8%, respectively. For practical verification, a system was built by attaching a camera and speaker to a Raspberry Pi. In the system, the YOLO model was applied. It was confirmed that beverage cans were recognized and output as sound in real time in various environments.

日本の缶コーヒーパッケージに対するデザイン現状分析 ―消費者行動分析およびデザイン現状分析を中心に

蘇文宰 한국브랜드디자인학회 2008 브랜드디자인학연구 Vol.6 No.1

This study is the pilot survey in order to grasp perceptivity process of consumers with the products package design. First of all, that made the consumers’needs to package design clear from analyzing customers’ behavior process of canned coffee beverages.Moreover, we considered the design strategy in a corporation for consumers’ needs by clarifyingthe present state of the package design.

제주에서 유통되는 어린이와 청소년 캔 음료에 대한 비스페놀 A 조사

이도승,오현정,김미경,고찬옥 한국식품영양과학회 2023 한국식품영양과학회지 Vol.52 No.8

Bisphenol A (BPA) is a major monomer used in various industries, primarily in production of polycarbonate plastics for food contact materials and epoxy resins for interior food can coatings. However, BPA is known to be an endocrine-disrupting chemical that can have harmful effects on human health. Therefore, this study investigated the residual levels of BPA in canned beverages targeted towards children and adolescents, based on data obtained from distribution markets in Jeju. The BPA analysis was performed using high-performance liquid chromatography with a fluorescence detector after purification using solid phase extraction. The value of the correlation coefficient (R2) was 0.9999. The limit of detection and quantification were 4.20 μg/L and 13.37 μg/L, respectively. The recovery rates for carbonated drinks, mixed drinks, fruit and vegetable drinks, coffee, and energy drink products were 93.33∼110.27%, 87.33∼93.60%, 99.33∼111.20%, 95.00∼96.00%, and 88.00∼89.27%, respectively. The results of analyzing the residual amount of BPA in 100 canned beverages revealed that it was absent in all samples. Thus, these results indicate that the canned beverage products distributed in Jeju are safe. 비스페놀 A는 주로 폴리카보네이트 플라스틱 생산과 식품용 캔의 내부 코팅제 등에 사용되는 에폭시 수지를 생산하는 원료이다. BPA는 인체에 유해한 영향을 줄 수 있는 내분비계장애물질로, 본 연구는 제주도 내 유통마켓으로부터 어린이 및 청소년들의 다소비 캔 음료를 대상으로 BPA 잔류량 조사를 수행하였다. BPA 분석은 SPE 정제 과정을 통해 HPLC-FLD로 분석하였다. 표준품 BPA 검량선의 상관계수값(R2)은 0.9999로 확인되었으며, BPA 검출한계(LOD)는 4.20 μg/L, 정량한계(LOQ)는 13.37 μg/L 수준이었다. 탄산음료, 혼합음료, 과채음료, 커피, 에너지드링크 제품에서 회수율은 각각 93.33~110.27%, 87.33~93.60%, 99.33~ 111.20%, 95.00~96.00%, 88.00~89.27%로 나타났다. 캔 음료(n=100)의 BPA 잔류량 분석 결과, 모든 시료에서 불검출을 보여 본 연구에 사용된 캔 음료 제품들에 대해서 BPA는 안전한 수준이라고 생각된다.

캔음료중 epichlorohydrin 의분석법에 관한 연구

이광호,곽인신,최재천,전대훈,김형일,강경모,최병희,김귀정,이철원 식품의약품안전청 2001 식품의약품안전청 연보 Vol.5 No.-

캔식품중에 잔류하는 epichlorohydrin을 분석하기 위한 pu링e & trap-Cc/uf통D 분석법을 확립하여 캔의 lacauer 코팅제에서 식품으로 이행되어 잔류하는 epichtorohydfn을 측정하고, 식품유사용매에 의한 용출시험을 통해 일일추정섭취량을 산출하였다. epichlorohydrin의 검량선은 y=0.0006x+0.OO6?(R큰0.9983)의 직선성·라 0.05#ga의 검출한계를 나타내었다. 각종 음료 및 식품유사용매에 일정량의 epichlorohydrin을 첨가한 후 분석하였을 때 회수을은 72~91%였으며, 실제 시판되는 f5건의 캔음료 중 잔류하는 epichlorohydrin을 측정한 결과 모든 캔음료에서 검출한계(0.1#94) 이하였다. 제관업체에서 구입한 modifed epoxy, epoxy phenolic, vinyl organosol, epoxy phenol ester 등의 BADGE(bisphenol A diglycidyt ether)형 에폭시수지로 lacquer 코팅된 식품용 캔에 식품윤사용매인 10% 또는 95% 에탄올을 층L진한 후 90~121'c의 드라이오븐에서 30분~2시간동안 용출시켰을 패 캔의 lacquer 코팅재에서 식품유사용매로 이행되는 epichBorollydirn은 코팅재질, 그리고 가열온도 및 시간에 문관하게 모든 캔에서 검출한계(0.4#ga)이하 였다. 위의 용출결과를 FD.f_의 "Recommendation for Chemistry Data for Indirect Food Additive Petition" 윽 일일추정섭취량 산출법에 적용하여 얻은 epichtorohydrin의 일딜추정 섭 취 량은 0.2r조persorday이하였다. A sensitive ana1?~7tical method based on gas cl)romatogFapy~mass spectrometry with a selected ion monitoring (GE/hfS-Slhf) and the purge-and-trap concentrator ))·asdeveloped for determining ot'epicillorohydrin in canr;ed be)#erages coated with eporl· resin. Thecalibration rurve in the ranre of 0.j ~50nr had'correlation coefficient of 0.9983 and detection limit of 0.Osrga. Recoveries of epichlorohydrin spiked to beverages were in the range of 72 ~91% with detection limits of 0.1 #ga. fn survey of epichlorohydff in twenty commercialcanned beverage samples, epichlorohydrin was not found in all the samples with the detectionlimit of 0.1 r9a. In migration test of various cans coated with BADGE-based coating cans;modifed epoxy, epoxy phenolic, vinyl organosol, epox?· phenol ester were exposed to the foodsimulants of 10% ethanol and 95% ethanol. flfo delectable epichlorohydrin migrated to foodsiHulants was found in aTl the cars with detection Jimit of 0.4 #9/L. Using the miEration data,along uTith the applicstion of food and beverage cans complied with FDA's "Recommendationfor Chemlstry Data f,3r Indirect Food Additive Petition" , the potential dietary exposure toepichlorohydrin was estlmated to be under 0.2rf/person/day.

민감도 분석을 통한 정비부서의 운영 전략 연구

유성환(Sung Hwan Yoo),김성문(Seong Moon Kim) 한국경영학회 2009 經營學硏究 Vol.38 No.2

We provide a mathematical programming model which calculates the number of workers to hire and assigns tasks to those workers for efficient operations of the maintenance department. The objective function of the mathematical model is to minimize the total labor costs. We examine the applicability of the proposed mathematical programming model through numerical evaluation. The main focus of this paper is the sensitivity analysis on the total labor cost and the optimal maintenance level by changing diverse parameters in the mathematical model. First, the increase on the failure rate of the major parts will sharply raise the total labor cost and the optimal maintenance level relative to the one of the minor parts. That is, if the major parts get older and break down more often than the average due to the long usage time, it will be better to perform maintenance more frequently in order to prevent any potential failure. Second, increasing the efficiency of intern workers will decrease the total labor cost and the optimal maintenance level. Usually the training cost of the educational program is required in order to increase the efficiency of intern workers. Then, the investment on the educational program should be compared with the decreasing amount of the total cost by the increased efficiency of intern workers for justification of the investment. We also demonstrate that the decrease on the optimal maintenance level by the increased efficiency of intern workers is more sensitive for the minor parts than for the major parts. Third, if the maintenance level goes beyond the optimal level, the total labor cost will go up rapidly for the major parts relative to the minor parts. The case study on the current operations in the maintenance department shows that the level of maintenance is well above the optimal level in both the major and the minor parts. In order to minimize the total labor cost, it is crucial to perform maintenance corresponding to the optimal levels for the major and the minor parts, respectively. Lastly, the ratio of the repair time relative to the maintenance time has been investigated. Generally speaking, when the ratio gets bigger, the optimal maintenance levels for the major and minor parts proportionally increase, which means that if it takes longer for repairing the broken machine compared for performing the maintenance, it is advisable to raise the maintenance level in order to prevent any potential failure of the machine. We find the increasing rate of the optimal maintenance level is higher for minor parts than for the major parts.

알루미늄 캔 스크랩의 고품위 재활용을 위한 발포금속의 제조

하원 ( Won Ha ),김세광 ( Shae Kwang Kim ),김영직 ( Young Jig Kim ) 한국주조공학회 2005 한국주조공학회지 Vol.25 No.5

스마트 오더 서비스가 만족도와 지속사용의도에 미치는 영향: 성격유형의 조절효과

연예지,박철 한국경영정보학회 2022 Information systems review Vol.24 No.2

스마트오더, 모바일앱, 기술수용모델(TAM), 성격유형, 식음료서비스 IT 및 모바일앱의 발전과 코로나19로 인한 비대면 서비스의 확대로 최근 ‘스마트 오더’가 식음료서비스분야에서 활성화되고 있다. 매출이 감소한 최근에도 스마트 오더에 의한 주문건수는 꾸준히 증가하고 있으며, 이러한 주문방식은 고객의 데이터를 축적할 수 있어, 향후 효과적인 고객맞춤 서비스를 가능하게 한다. 따라서 스마트 오더에 대한 만족과 지속이용의 메카니즘을 밝히는 연구는 필요하다. 본 연구에서는 기술수용모형(TAM)을 근간으로 스마트 오더의 만족과 지속이용의도를 연구하되, 고객의 성격유형(외향-내향)의 조절효과를 검토해 보았다. 이를 위해 스마트 오더 이용자 317명을 대상으로 설문조사를 실시하였고, 구조방정식모형 분석에 의해 가설을 검증하였다. 인지된 유용성, 용이성, 유희성이 모두 만족도에 유의한 영향을 미쳤고, 만족도는 지속이용의도에 유의한 영향을 미쳤다. 이러한 영향은 내향적 고객의 경우가 더 컸으며, 이는 언택트(untact) 서비스의 경우에 만족과 지속이용의도에 성격유형에 따른 차이가 있음을 보여주었다. 이러한 결과는 향후 서비스의 고객맞춤화 전략에서는 고객의 성격유형이 고려되어야함을 시사하고 있다.