• 산업식품공학
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• 제21권1호
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• pp.12-21
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• 2017

Foods are becoming more customized and consumers demand food that provides great taste and appearance and that improves health. Food three-dimensional (3D)-printing technology has a great potential to manufacture food products with customized shape, texture, color, flavor, and even nutrition. Food materials for 3D-printing do not rely on the concentration of the manufacturing processes of a product in a single step, but it is associated with the design of food with textures and potentially enhanced nutritional value. The potential uses of food 3D-printing can be forecasted through the three following levels of industry: consumer-produced foods, small-scale food production, and industrial scale food production. Consumer-produced foods would be made in the kitchen, a traditional setting using a nontraditional tool. Small-scale food production would include shops, restaurants, bakeries, and other institutions which produce food for tens to thousands of individuals. Industrial scale production would be for the mass consumer market of hundreds of thousands of consumers. For this reason, food 3D-printing could make an impact on food for personalized nutrition, on-demand food fabrication, food processing technologies, and process design in food industry in the future. This article review on food materials for 3D-printing, rheology control of food, 3D-printing system for food fabrication, 3D-printing based on molecular cuisine, 3D-printing mobile platform for customized food, and future trends in the food market.

• 한국산학기술학회논문지
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• 제21권10호
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• pp.421-432
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• 2020

본 연구의 목적은 초등학교 고학년 학생의 인터넷 게임 및 스마트폰 이용실태를 파악하고자 하였다. 2018년 10월 6일부터 2019년 9월 30일까지 K 지역 소재 16개 초등학교에 재학 중인 4~6학년 1,618명을 대상으로 자료를 수집하였고, 기술통계와 빈도분석, Chi-square를 이용하여 분석하였다. 연구결과, 인터넷 게임중독 자가진단척도(I-GUESS)는 고위험군이 6.1%로 나타났고, 스마트폰 과의존 척도(S-scale)는 잠재적 위험군 10.1%, 고위험군 0.8%로 나타났다. 인터넷 게임 및 스마트폰 사용과 관련된 신체적 문제는 36.0%가 경험했다고 응답했고, 눈의 피로가 20.4%로 가장 높았다. 정서적 문제는 18.5%에서 경험했다고 응답했으며, 분노가 6.8%로 가장 높았다. 사회적 문제는 21.8%가 경험한 것으로 파악되었고, 부모와의 갈등이 10.3%로 가장 높게 보고되었다. S-scale 점수와 I-GUESS 점수에 따른 주 사용 콘텐츠를 조사한 결과, S-scale 점수와 I-GUESS 점수가 높을수록 중계방송콘텐츠를 가장 많이 사용하는 것으로 나타났다. I-GUESS와 S-Scale 간의 상관관계에서는 I-GUESS와 S-Scale 간의 상관관계에서는 I-GUESS 점수가 고위험군 일수록, S-scale의 고위험군 비율도 높게 나타났으며, S-scale 점수가 고위험군 일수록 I-GUESS 점수의 고위험군 비율도 높은 것으로 나타났다. 향후, 이러한 변수를 고려하여 예방의 관점에서 초등학생을 위한 중재 프로그램 및 부모 교육 컨텐츠 개발이 시급함을 제언코자 한다.

• 한국경제지리학회지
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• 제22권1호
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• pp.18-35
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• 2019

우리나라 경제성장을 견인하던 산업단지가 노후화되면서 노후산업단지의 경쟁력 향상을 위한 대응이 요구되고 있다. 본 논문은 국내 121개 노후산업단지를 대상으로 경쟁력 결정요인을 실증 분석하는 데 목적을 두었다. 본 연구의 주요 결과는 다음과 같다. 산업구조 특성, 신규업체 특성, 근무 및 생산 환경, 배후지역 특성은 노후산업단지의 경쟁력에 영향을 미치지만 산업단지 규모에 따라 영향력은 차이를 보이는 것으로 나타났다. 특히, 대규모 노후산업단지의 경우에는 구조조정을 위한 중앙정부의 역할이 중요한 반면, 소규모의 경우에는 대규모 정비사업보다 지방정부의 입주업체 관리가 더욱 중요한 것으로 나타났다. 본 논문의 결과는 노후산업단지의 효과적인 관리를 위한 시사점을 제공하였다.

• 대한산업공학회지
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• 제33권4호
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• pp.393-401
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• 2007

Affective aspects of design attributes such as color, Pattern, and texture are important to the overall impression and the success of interior products. Among all the interior materials, wallpapers and flooring materials take up largest construction area and they are main components in creating affective impression for customers. This study aims to investigate the relationship between luxuriousness and related affective variables and design elements of wallpapers and flooring materials. The approach consists of 3 steps: (1) selecting related affective features and product design attributes through a literature survey, opinion of expert panel, and focus group interview, (2) conducting evaluation experiments, and (3) developing Kansei models using multivariate statistical analysis and analyzing critical attributes. Evaluation experiment was conducted using a questionnaire made up of 7-point scale and 100-point scale and 30 housewives and 20 interior designers participated in the evaluation experiment. The result of evaluation was analyzed through principal component regression and quantification I analysis. As a result of analyzing the survey data, the relationship between luxuriousness and related affective features and product design attributes was identified, moreover a optimal combination of the design component was identified. Consequently, it is expected that the results of the study would be a basis of the concept of emotion-based design by giving insights about how customers perceive the luxuriousness and suggesting the optimal combination, and providing specific quantitative design guidelines.

• 대한산업공학회지
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• 제40권3호
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• pp.333-341
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• 2014

The purpose of this study is to forecast the penetration rate of renewable energy and a reasonable scale for the R&D investment plan in Korea based on the relationship between the diffusion and R&D investments drawn by analogy from empirical cases of advanced countries. Among numerous candidate developed countries, the German market was chosen based on the similarity of the diffusion patterns to those of the Korean plan. We then figured out how the investment triggers the growth of technology from the selected benchmark, and applied the technology S-curve relation formula to derive the desirable investment plan for Korea. The present paper is a pioneering attempt to forecast the diffusion process of renewable energy technology in Korea using the comparative analogy from cases of advanced countries.

• The Journal of Asian Finance, Economics and Business
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• 제8권2호
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• pp.183-194
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• 2021

This study aimed to examine the effect of corporate characteristics, including the industrial sector and scale of operation, financial leverage, profitability, operating period, and social reputation, on socio-ecological responsibility based on Global Reporting Initiative (GRI) standards. The study was conducted in the Indonesian context. A total of 90 public companies listed on the Indonesia Stock Exchange were selected as samples, with an observation period of 10 years. A univariate regression analysis was applied to test the hypotheses. The results showed that the industrial sector, scale of operation, financial leverage, profitability, operating period, and social reputation of the corporate had a positive effect on socio-ecological responsibility. This study also obtained evidence that there were differences in the level of socio-ecological responsibility among the industrial sectors. The higher the relationship between the industrial sector and the possibility of the emergence of social and environmental issues, the higher the level of corporate socio-ecological responsibility. From a policy perspective, the implication of the results of this study was that it could be used as a consideration by the authorities or regulators in Indonesia, particularly the Financial Services Authority (OJK), in determining specific indicators of socio-ecological responsibility that must be carried out by corporates.

• 설비공학논문집
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• 제29권10호
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• pp.530-537
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• 2017

Scales generated inside pipes cause negative effects on heat transfer performance, pressure loss and flow rate due to increased thermal resistance and reduced flow cross-sectional area. If these scales are not prevented or eliminated, thermal-fluid performance of the facilities can be deteriorated, or in extreme cases, accidents such as explosion due to overheating can occur. There are two ways to remove the scales, physically and chemically. Removing the scales physically needs specific machines which are expensive, and removing them chemically may provoke corrosion or shorten the age of the facilities. In this study, an eco-friendly pipe scale cleaner using natural organic acid is developed by applying the concept of a limestone cave generation. The manufactured scale cleaner is applied to remove the scales in industrial, water heating and urinal pipes. The results show that this cleaner removes scales more effectively and safely compared to existing scale treatments. Scale removal efficiencies of this work is 1.2~10.7 times for industrial pipes and 1.8~15.5 times for boiler water heating pipes higher than those of conventional cleaners.

• 한국산학기술학회논문지
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• 제19권5호
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• pp.9-16
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• 2018

광원 자체의 밝기가 낮거나 그림자 등의 이유로 어두운 영역을 포함하는 이미지는 Retinex 기반의 영상화질 개선기법을 통해 주관적 화질을 높일 수 있다. Retinex 이론은 인간의 시각 시스템이 장면을 인식할 때 특정 위치에서의 장면의 밝기를 인식하는 것이 아니라 주변과의 상대적인 밝기를 인식하는 특징을 적용한 방법으로 크게 SSR, MSR, MSRCR의 방법으로 나눌 수 있다. 제안하는 방법은 컬러복원단계를 포함하고 있는 MSRCR에 기반한 방법으로 크게 3단계로 구성되어 있다. 첫 번째 단계에서는 기존의 MSRCR 방법을 적용하고 두 번째 단계에서 MSRCR 출력의 동적 영역을 이미지의 히스토그램분포에 따라 조정한다. 마지막 단계에서는 인간의 시각특성을 고려한 로그변환함수를 이용하여 Retinex 출력 값을 디스플레이 동적영역으로 변환한다. 실험결과 제안하는 알고리즘은 전체적으로 어두운 이미지뿐만 아니라 밝은 영역과 어두운 영역을 모두 포함하는 이미지에서도 주관적 화질을 효과적으로 증가시키는 것을 볼 수 있다. 특히 낮은 밝기를 갖는 이미지의 경우 제안한 알고리즘은 기존의 방법들 보다 높은 성능향상을 보였다.

• 한국식품과학회지
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• 제33권6호
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• pp.808-811
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• 2001

자색고구마로부터 anthocyanin색소를 대규모로 추출 및 농축하여 색소의 추출효과 및 색소액의 품질을 조사하였다. 자색고구마 원료 50 kg에 1% citric acid를 함유한 20% ethanol용액 500 L를 가하여 추출하였으며, bag filter와 pore size $1{\mu}m$인 microfilter를 이용하여 2단계로 여과한 후 $40^{\circ}C$, 진공도 600 mmHg에서 감압농축하였다. 전반적으로 대규모 추출시의 색소의 추출양상은 실험실규모의 소규모 추출의 경우와 유사하였다. 추출된 색소액의 TOD는 6.53이었으며, 농축액의 TOD는 120.45으로 18.45배 농축되었다. 색소추출액의 BI와 DI는 각각 5.86, 1.55이었으며 농축액의 BI와 DI는 각각 5.89, 1.56으로 농축과정 중에 색소의 변색이나 변질이 없었다. 색소추출액의 pH는 2.9이었으며 농축액의 pH는 2.5로 감소하였다.

• 산업경영시스템학회지
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• 제45권3호
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• pp.49-56
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• 2022

ROK Navy intends to secure the Korean-type aircraft carrier in order to effectively prepare for various future security threats. In general, the Korean national competency is considered to be at the level of having an aircraft carrier, but it is unclear what scale aircraft carrier would be appropriate. In this study, the efficiency was evaluated through the relative comparison between national competency(national power, economic power) and the scale of aircraft carriers, and the optimal scale of the Korean-type aircraft carrier that could be acquired was presented. A DEA(Data Envelopment Analysis) model was applied to aircraft carriers(19 aircraft carriers in 11 countries) currently in operation and scheduled to be possessed in the world. As input variables, CINC(Composite Index of National Capability) and GDP(Gross Domestic Product), which are the most widely used as indicators of national and economic power, and as output variables, the full-load displacement, length, and width of aircraft carriers were selected. ARIMA(short-term within 5 years) and simple regression(long-term over 5 years) were used to estimate the future national competency of each country at the time of aircraft carriers acquisition. The relative efficiency score of the Korean-type aircraft carrier currently being evaluated is 1.062, and it was evaluated as small-scale aircraft carrier compared to the national competency. Based on Korean national competency, the optimal scale of the Korean-type aircraft carrier calculated by aggregating benchmark groups, is 58,308.1 tons of full-load displacement, 279.4m in length, and 68.3m in width.