• 패션비즈니스
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• 제21권6호
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• pp.87-105
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• 2017

In the fashion industry, 2D apparel CAD technology has already matured and various 3D apparel CADs have been introduced and are available for users. In the fourth industrial revolution era, the 3D apparel technology will be highlighted, and the research of 3D apparel CAD will be much more emphasized upon. Currently, various 3D apparel CAD have been developed and commercialized due to the rapid development of technology. However, in reality, the analysis and discussions about its problems and the improvements for clothing from a user's perspective have not been carried out yet. The purpose of this study was to provide the reference information about 3D apparel CAD for users by studying and comparing the characteristics of 3D apparel CAD. The 3D apparel CAD, DC Suite and CLO3D were selected for technical comparative study. The 3D apparel CAD mainly includes 3D body system, garment pattern system and garment simulation system and so on. It was compared and analyzed; the problem was presented, and the directions of improvement were put forth.

• 한국산업정보학회논문지
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• 제25권2호
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• pp.1-9
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• 2020

스마트공장은 4차 산업혁명으로 잉태되는 핵심산업 중 하나이다. 스마트공장을 실현하기 위한 기술 중 무인운반차 기술은 초기 단계로 이를 구현하기 위해선 높은 비용이 필요하다. 저비용 AGV를 개발하기 위해선 많은 데이터가 요구되지만, 저장공간이 부족하고 AGV가 이동하므로 데이터 수집 방법이 제한된다. 따라서 본 논문에서는 블루투스를 이용한 무선통신 기반 개발환경을 구축하고 이를 통해 수집한 데이터를 이용하여 차선 검출기를 개발하고자 한다. 이렇게 개발된 차선 검출기는 조명 환경의 변화나 그림자 유무와 관계없이 높은 차선 인식률을 보인다.

• 한국추진공학회지
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• 제11권3호
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• pp.7-12
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• 2007

마찰용접은 소재를 서로 마찰시켜 마찰열에 의해 용접하는 방법이다. 본 연구는 내부에 유동부를 갖는 부분을 마찰용접을 이용하여 용접했을 때 유체의 유동에 영향이 없는 유동부를 설계하는데 목적을 두고 있다. 용접부의 설계 변수를 결정하고 이에 대하여 마찰용접 해석을 DEFORM-2D를 이용하여 해석을 수행하였다. 마찰용접 해석을 수행하기 위해 온도변화에 따른 마찰계수와 업셋 압력, 소재의 분당회전수, 그리고 유동응력을 입력해 주었다. 해석결과에 따라서 유동에 영향이 없는 용접부의 최적형상을 결정하였다.

• 한국멀티미디어학회논문지
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• 제22권2호
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• pp.194-202
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• 2019

In the information society represented by the Fourth Industrial Revolution, various types of data and information that are difficult to see are produced, processed, and processed and circulated to enhance the value of existing goods. The IoT(Internet of Things) paradigm will change the appearance of individual life, industry, disaster, safety and public service fields. In order to implement the IoT paradigm, several elements of technology are required. It is necessary that these various elements are efficiently connected to constitute one system as a whole. It is also necessary to collect, provide, transmit, store and analyze IoT data for implementation of IoT platform. We designed and implemented a big data processing IoT platform for IoT service implementation. Proposed platform system is consist of IoT sensing/control device, IoT message protocol, unstructured data server and big data analysis components. For platform testing, fixed IoT devices were implemented as solar power generation modules and mobile IoT devices as modules for table tennis stroke data measurement. The transmission part uses the HTTP and the CoAP, which are based on the Internet. The data server is composed of Hadoop and the big data is analyzed using R. Through the emprical test using fixed and mobile IoT devices we confirmed that proposed IoT platform system normally process and operate big data.

• 한국기계가공학회지
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• 제18권7호
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• pp.1-7
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• 2019

A chatter lobe analysis is frequently used to look at the chatter state. Even if there is a lot of research on chatter, chatter lobe characteristics are not well defined. In this study, the chatter lobe behavior according to several variables of vibration mode is verified for further clarity. The dynamic variables of the chatter model are defined and their behaviors on chatter lobe boundary are analyzed in detail. In this sense, the chatter model with 2-DOF (2-DOF) was used to analyze chatter stability characteristics. The discussed results are satisfying and these can be used for the prediction of chatter existence in machining processes of 2-DOF systems in several revolution range. These analyses indicate a better agreement for predicting an appropriate stability lobe over a wide detailed range of critical depths of cut in machining operation. The results allow an excellent prediction of chatter according to various static and dynamic variables in machining states. The behavior of chatter dynamic variables in machining were also discussed in detail. All these results can also be applied to other machining processes by establishing a chatter model in a 2-DOF system.

• Advances in Computational Design
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• 제4권1호
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• pp.43-52
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• 2019

Variation Analysis (VA) is used to simulate final product variation, taking into consideration part manufacturing and assembly variations. In VA, all the manufacturing and assembly processes are defined at the product design stage. Process Capability Data Bases (PCDB) provide information about measured variation from previous products and processes and allow the designer to apply this to the new product. A new challenge to this traditional approach is posed by the Industry 4.0 (I4.0) revolution, where Smart Manufacturing (SM) is applied. The manufacturing intelligence and adaptability characteristics of SM make present PCDBs obsolete. Current tolerance analysis methods, which are made for discrete assembly products, are also challenged. This paper discusses the differences expected in future factories relevant to VA, and the approaches required to meet this challenge. Current processes are mapped using I4.0 philosophy and gaps are analysed for potential approaches for tolerance analysis tools. Matching points of simulation capability and I4.0 intents are identified as opportunities. Applying conditional variations, incorporating levels of adjustability, and the un-suitability of present Monte Carlo simulation due to changed mass production characteristics, are considered as major challenges. Opportunities including predicting residual stresses in the final product and linking them to product deterioration, calculating non-dimensional performances and extending simulations for process manufactured products, such as drugs, food products etc. are additional winning aspects for next generation VA tools.

• 한국정보기술학회논문지
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• 제17권1호
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• pp.149-156
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• 2019

혼합현실 기술(MR)은 4차산업혁명 요소기술 중의 하나로 크게 부각되고 있다. MR 기술은 단순한 디지털 콘텐츠 산업으로서 만이 아니라 건축분야, 관광분야, 의료분야, 각종 교육분야에서 널리 적용되고 있으며 그 활용성을 넓혀가고 있다. 본 논문에서는 MR 단말기와 PC, 모바일 단말기 등 이기종 기기를 연동하는 건축분야 활용을 위한 협업 서비스 플랫폼을 제안하고 시작품 개발과 이의 검증을 수행하였다. 결과, 건축에서 주로 사용되는 skp확장자를 이용하는 3D 모델을 서비스 시작품을 이용하여 MR 단말기인 홀로렌즈를 대상으로 한 MR 콘텐츠 생성을 수행하여 변환시간 및 정상 동작을 확인하였다.

• 한국의류산업학회지
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• 제24권1호
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• pp.15-28
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• 2022

In the Fourth Industrial Revolution era, with its accelerating radical changes and innovation, fashion is rapidly advancing to sustain social changes introduced by technological convergence. In light of this, the study investigates the social and cultural characteristics of technologizing fashion products: creative modifications emerge from technological convergence with fashion products and result in a realm separate from technology. By focusing on the nature of fashion, this study analyzes the technologization of fashion products for added value creation in the fashion system. Based on the findings, it interprets different attitudes toward technologizing that changes fashion products. Accordingly, this study reviews previous literature and qualitatively examines empirical cases based on inductive reasoning. In particular, it analyzes commercialized cases of fashion-technology convergence in fashion products found on online fashion media outlets between January 2007 and May 2021, a central period in intellectual and technological innovation. The characteristics of technologized fashion products are identified as follows: expansion of physical functions and categories, interaction with emotional sensibilities, artistry through combination with technologies, and computer-generated imagery(CGI) fashion as digital goods. Therefore, this study analyzes the characteristics of technologization, focusing on the social and cultural properties of fashion products. The findings provide opportunities to understand the paradigm shift of these products that was catalyzed by technologizing.

• 디지털산업정보학회논문지
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• 제18권2호
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• pp.77-91
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• 2022

Social innovation refers to activities that solve social problems by developing new ideas in cooperation with actors close to the field for the purpose of preserving the sustainability of society. In the field of social innovation, voices calling for a bottom-up method that starts with citizen participation are growing, and the need to improve public officials' awareness of social innovation and strengthen professionalism is being raised. In the era of Covid 19 and the 4th industrial revolution, digital literacy is being emphasized to us. In the field of social innovation, the need to strengthen social activities using digital media is growing. In this paper, an example of online social innovation project education based on the design thinking methodology was presented for public officials in Busan to improve their awareness of social innovation and secure expertise, and the effect of job competency reinforcement was statistically verified. As a result of statistical analysis, the average difference between the 'online communication' factor and the 'online empathy' factor was the largest, and it can be interpreted that digital literacy for social innovation has been strengthened.

• KEPCO Journal on Electric Power and Energy
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• 제8권2호
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• pp.127-135
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• 2022

With the advent of high technologies such as the 4th Industrial Revolution and artificial intelligence and big data, efforts are being made to solve urban problems and improve the quality of life by applying new technologies in the smart city field. In addition, as carbon neutrality has emerged as an important issue due to global warming, smart city energy platform technologies such as urban energy management, efficiency improvement, and carbon reduction are in the spotlight. In order to effectively manage urban energy, energy resource information such as electricity, water, gas, hot water, heating, etc. must be collected from the management system of various energy utilities and managed on the central platform. The centrally integrated data is delivered to external city management systems that require city energy information through an energy platform. This study developed a CIM profile for smart city energy monitoring required to provide energy data to external systems. Electric data model were designed using the CIM class of IEC 61970, and water, gas, and heat data model were designed in compliance with the UML-based design ideas of IEC 61970.