• 품질경영학회지
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• 제46권3호
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• pp.707-716
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• 2018

Purpose: This study aims to analyze the management performance and production efficiency of strawberry farmers who introduced smart farming, one of the primary symbols of the fourth industrial revolution in the agricultural sector. Methods: We conducted an empirical survey of strawberry farms using smart farming and analyzed production efficiency using DEA method. Results: First, difficulties for strawberry farmers introducing smart farming included time and money spent on parts replacement and additional costs due to compatibility problems with existing facilities after the adoption. Second, strawberry farmers using smart farming increased their total income by producing higher yield and improving quality thanks to the competent growth management. Third, the analysis of production efficiencies before and after smart farming found improvement in technical efficiency, pure technical efficiency, and scale efficiency. But, the gaps in technical and scale efficiencies among the farms widened. Conclusion: Based on the results above, following policy suggestions are offered. First, an environment control technology suitable for strawberry farming needs to be developed. Second, the smart farming technology needs to be standardized by the government. Third, new smart farm models need to be developed to accommodate to the facilities and environment in Korea through collecting big data including high-quality data on the environment, growth, and yield. Fourth, continuing education needs to be provided to narrow the gap in smart farming technology among strawberry farmers.

• 대한산업공학회지
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• 제39권2호
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• pp.129-134
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• 2013

The airport processes are restricted by some limits of performance objects as size of airport, ability of human resources, capacity of facilities and operational rules. These limitations make passenger handling difficult when passenger numbers increase. In order to solve this problem, we modeled the airport process and analyzed departure passenger arrival, scheduled security manpower under specific customer service level maintenance with mixed integer programming and validate the efficiency with simulation with adapting smart airport framework. We concluded that the airport management with information techniques can reduce waiting time within security and immigration process.

• 한국기계가공학회지
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• 제20권6호
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• pp.92-99
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• 2021

The rotavator is attached to the three-point hitch at the rear of a tractor and uses the power take-off strength of the tractor to perform soil harrowing. During operation, the power transmitted to the gearbox of the rotavator varies with the soil characteristics and depth. These properties influence the reliability of the gearbox. In this study, actual load measurements and analyses were performed using a rotavator. In addition, the safety factor and fatigue life of the gearbox components were determined using the analysis results. Through analysis and tests, the contact pattern of the gear tooth surface was identified. The input power values of the gearbox were minimum and maximum at 54.5% and 84.5% of the tractor power, respectively. Based on the actual load analysis results, the strength and fatigue life of the gearbox components were satisfied. In addition, through the analysis and testing of the gear contact pattern, it was confirmed that a similar contact occurred. Through the analysis, the magnitude of the load acting on the tooth surface of the gear was confirmed.

• 디지털융복합연구
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• 제17권1호
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• pp.169-177
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• 2019

현재의 도시는 교통혼잡, 환경오염, 도시범죄와 같은 다양한 문제를 겪고 있으며 성장 한계에 직면 해 있다. 도시의 지속가능한 성장은 경제, 사회 및 환경과 밀접한 관련이 있으며 인구통계학적 추세에 대한 이해를 바탕으로 잘 관리 된 도시는 부정적인 요인을 최소화하고 이익을 극대화 할 수 있다. 최근에는 이러한 도시 문제를 해결하기 위해 스마트 시티를 구축하려는 다양한 시도가 확산되고 있다. 그러나 스마트 시티에 대한 다양한 정의가 혼재되어 있고, 스마트 시티 구현 방법과 전략은 기술의 발전과 축전된 경험으로 인해 진화하고 있다. 본 연구에서는 문헌연구를 통해 그동안 제시된 스마트 시티의 정의들을 정리하여 통합적인 정의를 제시하였다. 스마트 시티는 제4차 산업혁명과 함께 미래 사회의 핵심 플랫폼으로 주목받고 있다. 그동안의 스마트 시티가 기존의 도시 문제해결에 치중하였다면 제4차 산업혁명시대에서의 스마트 시티는 혁신을 통한 지속가능한 성장을 할 수 있어야 함을 더욱 강조하고 있다. 본 연구에서는 제4차 산업혁명의 플랫폼으로서 스마트 시티를 구축할 때 추진되어야 할 전략들을 제시하였다.

• 한국산학기술학회논문지
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• 제19권6호
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• pp.507-518
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• 2018

본 연구는 과도기적 시기를 보내고 있는 국내 스마트시티 사업이 향후 더욱 발전하고 세계시장에서의 경쟁력을 확보하기 위한 방안을 마련하는 것을 목적으로 한다. 이를 위해 먼저 국내 스마트시티(U-City) 정책의 발단과 성장과정을 살펴보았다. 두 번째, 스마트시티 구축과정 상에 나타난 기능적, 정책적 문제점을 파악하였다. 세 번째, 국내와는 다른 방식으로 스마트시티 사업을 추진하고 있는 해외 선진사례를 검토하였다. 네 번째, 확대된 스마트시티의 개념과 이에 대응하고 있는 우리나라의 정책변화 양상을 살펴보았다. 다섯 번째, 앞의 검토를 종합하여 향후 우리나라의 스마트시티 발전을 위해 나아가야 할 추진방향 및 과제에 대해 제시하였다. 본 연구는 과거 국내의 스마트시티 개발 초창기부터 현재에 이르기까지 국내 스마트시티 정책의 흐름을 종합적으로 살펴보고 최근 급변하고 있는 환경변화 및 기술발전을 감안한 향후 과제를 제시한다는 점에서 그 의의가 있으며 향후 국내 스마트시티의 발전 및 고도화를 위한 정책 수립의 기초적 토대로 작용할 수 있을 것으로 기대된다.

• 한국산업정보학회논문지
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• 제27권4호
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• pp.65-79
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• 2022

본 연구는 스마트제조 관련 국내·외 특허 데이터와 토픽모델링 방법을 활용하여 스마트 제조 관련 기술의 세부 영역을 식별하고 해당 영역에서 미국, 일본, 독일, 중국, 한국 등 주요국의 기술 개발 동향을 비교하였다. 이를 위해 1991년부터 2020년 사이에 미국과 유럽에서 출원된 특허를 수집하고 특허 초록을 가공한 후, LDA 모형을 적용해 토픽을 식별하였다. 연구 결과, 스마트제조 관련 기술의 세부 영역은 크게 7개로 구분되며 글로벌 차원에서는 최근 '데이터 처리 시스템 관련 기술'과 '열·유체 관리 기술'의 기술 개발 비중이 상당히 높아지고 있는 것으로 나타났다. 주요국과 한국의 기술 개발 동향을 비교한 결과, '열·유체 관리 기술' 분야에서 상대적인 강점이 있다는 점을 고려하면 국내 주력산업인 중화학 제조업과 연계한 스마트제조 관련 연구개발 및 관련 산업의 육성 추진 전략이 효과적일 것으로 보인다. 본 연구는 기존 정성적 기술 수준 평가의 한계를 극복하고, 텍스트마이닝 기법을 적용한 기술 역량 평가 방법론을 제안하였다는 측면에서 의의가 있다.

• 품질경영학회지
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• 제48권1호
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• pp.87-105
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• 2020

Purpose: This paper aims to propose a practical strategy for smart factories and a step-by-step quality strategy according to the maturity of smart factory construction. Methods: The characteristics, compositional requirements, and diagnosis system are examined for smart factories through theoretical considerations. Several cases of implementing smart factory are studied considering the company maturity level from the aspect of the smartness concept. And specific quality techniques and innovation activities are carefully reviewed. Results: The maturity level of smart factory was classified into five phases: 1) ICT non-application, 2) basic, 3) intermediate 1, 4) intermediate 2, 5) advanced level. A five-step quality strategy was established on the basis of case studies; identify, measure, analyze, optimize, and customize. Some quality techniques are introduced for step-by-step implementation of quality strategies. Conclusion: To build a successful smart factory, it is necessary to establish a quality strategy that suits the culture and size of the company. The quality management strategy proposed in this paper is expected to contribute to the establishment of appropriate strategies for the size and purpose of the company.

• International journal of advanced smart convergence
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• 제7권4호
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• pp.75-83
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• 2018

Predictive IoT Sensor Algorithm is a technique of data science that helps computers learn from existing data to predict future behaviors, outcomes, and trends. This algorithm is a cloud predictive analytics service that makes it possible to quickly create and deploy predictive models as analytics solutions. Sensors and computers collect and analyze data. Using the time series prediction algorithm helps to predict future temperature. The application of this IoT in industrial environments like power plants and factories will allow organizations to process much larger data sets much faster and precisely. This rich source of sensor data can be networked, gathered and analyzed by super smart software which will help to detect problems, work more productively. Using predictive IoT technology - sensors and real-time monitoring - can help organizations exactly where and when equipment needs to be adjusted, replaced or how to act in a given situation.

• 한국염색가공학회지
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• 제29권3호
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• pp.155-161
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• 2017

In CPB(Cold-Pad-Batch) dyeing, the rubber of the padder roll is influenced by the heat, chemical and mechanical influences and thus aging of the padder roll rubber occurs. This study presents an accelerated thermal aging test of the CPB padder roll rubber with strong alkali conditions. Using Arrhenius formula of the various property values for the various aging temperatures($80^{\circ}C$, $90^{\circ}C$, $100^{\circ}C$) of the padder roll, the accelerated life predictions could be calculated. The threshold value of the property was set at different values. The hardness was set at the point where 5% degradation occurs based on the actual use conditions, and the tensile strength was set at the point where 50% degradation occurs based on the general life prediction standards. From the results of the different physical properties at differing temperatures, the Arrhenius plot could be obtained. Through the usage of the Arrhenius Equation, significant duration expectation could be predicted, and the chemical aging behavior of the CPB padder roll could be found at the arbitrary and actual temperatures.

• 한국염색가공학회지
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• 제17권6호
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• pp.51-59
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• 2005

To manufacture hightech easycare wool, there are several methods which use strong oxidising agent or the resin treatment, however, neither are environmentally friendly methods. Moreover it may deteriorate the handle. The aim of this study is to manufacture the hightech easycare wool using the modified Fenton method which can be formed by hydrogen peroxide and ferric sulfate and enzyme treatment. The method was pretreated by ferric sulfate on the wool surface and then the surface of wool scale was selectively removed by ferric ion catalyst. Subsequently the Enchiron which is one of the proteolytic enzymes was treated on the wool surface. The treated wool had the result of having optimum weight loss and excellent whiteness and good handle. Therefore implications of these results suggest that this method using the modified Fenton method and enzyme treatment may be one way of manufacturing the hightech easycare wool.