• Journal of the Korean Society for Precision Engineering
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• v.33 no.6
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• pp.499-508
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• 2016

This paper describes a study of performance prediction of an electric propulsion system for multirotor UAVs. The electric propulsion system consists of motors, propellers, batteries and speed controllers, and significantly affects performance characteristics of the platform. The performance of the electric propulsion system for multirotor UAVs was predicted using an analytical model derived from the characteristics of each component, operation experiments and statistical analyses. Ground performance tests and endurance flights were performed to verify the reliability of the proposed performance prediction method. A quadrotor platform was designed to demonstrate the parcel delivery service used in the endurance flight. From the result of verification tests, it was confirmed that the proposed method has a good agreement.

• Cartoon and Animation Studies
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• s.10
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• pp.159-178
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• 2006

Digital Media have been advanced and disseminated at the same time around the world. Digital contents have been evolved while Product Technology and Process Technology of 3D Digital Animation and On-line game have completed the innovative developments. First of all, several problems can be occurred when product technology can not lead the evolvement of digital contents. To accomplish the evolvement of both product technology and process technology of digital contents, the whole production system and process system must be modulized. Modulization of system can be completed by the consistent and stable integration of platform. Modulization of production system can bring out the modulization of product technology and then the modulization of technology can speed up the commercialization and market test.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.14 no.5
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• pp.2022-2042
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• 2020

This research aims to contribute to the discipline of knowledge management (KM) in Higher Education (HE), and is conducted using the case of the study programme (SP) for Integrated Academic Studies (IAS) of Technics and Informatics (TI). A deduction-induction methodology is applied, using a Plan-Do-Check-Act (PDCA) approach to design a suitable KM concept for making improvements to the SP IAS TI on the standardisation platform. Based on the application of the International Classification of Standards (ICS), the research analyses the correlations and competences acquired during the courses within the accredited TI study programme of two-course studies. On the basis of the results of a comparative analysis of the developmental learning process and educational goals, it is shown that knowledge management in correlation with standardisation leads to the improvement of study programmes in the upcoming accreditation cycle on the standardisation platform. Frequent innovations within standardised thematic fields (daily, weekly, monthly, etc.) indicate the need for appropriate changes to the SP. The contribution to KM is through an original analysis of annual samples of more than 90,000 standardised sources in correlation with the TI study programme. Expert System (ES) modelling and the original results enable an analogous contribution to the future KM of other SPs.

• Journal of the Korean Society for Precision Engineering
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• v.33 no.9
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• pp.707-714
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• 2016

This paper describes analysis results of vibration characteristics and modal test for a small-scale quad-rotor drone. The rotor arm has a slender body with a propeller and motor at its tip. Rotor system generates excitation for an unbalanced mass. Therefore, the drone platform is involved in the possibility of resonance. For advance identification of the possibility of resonance, confirmation of eigen-mode being closest to the propeller operation range is necessary. Material properties of CFRP tubes used for the rotor arm were acquired by finding the natural frequency based on Rayleigh method. A simplified quad-rotor FE model consisting of rotor arm assembly with tip mass was built to perform numerical analysis, and a free-free boundary condition was applied to provide flight status. Modal tests for the actual platform with impact hammer instrument were performed to verify analysis results. Separation margin from hazardous eigen-mode was checked on the propeller operation range.

• Journal of the Ergonomics Society of Korea
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• v.31 no.1
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• pp.85-92
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• 2012

Objective: This paper aims to discuss the case study of Design Dive: Service Design Workshop that was held to improve public services by applying service design methods(February 2011~May 2011). In so doing, it suggests the ways in which public services can be innovated from a design-oriented perspective. Background: As citizens' social and cultural awareness of services is enhanced, there have been emerging needs for innovation of public services. Accordingly, the methods of service design which is to design holistically users' experiences have been considered as an important means to innovate public services. Method: In this regard, the present paper introduces and explores the example of the Design Dive Workshop as a platform whereby service design is achieved. In particular, it analyzes the results of the workshop. Results: The paper presents the results of the workshop and the 10 possible scenarios of public services that were explored in the workshop and suggests models for empowering the workshop participants. Conclusion: Service design is a very effective methodology for providing a new perspective on user-oriented design of public services. The workshop had educational effects on enhancing the participants' awareness of the role of public service design. Application: The Design Dive workshop contributed to improving public services and achieved positive educational results. The methods developed in the workshop can effectively be applied to various occasions on which public services should be improved.

• International Commerce and Information Review
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• v.12 no.1
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• pp.55-73
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• 2010

The thesis examines new innovation of various aspect to overcome lots of problems which come by when we execute simplification of trade procedure and administration fairly. Practical implications regarding the innovation of electronic trade infrastructure are as follows. First, it will propel the standardization of electronic trade section in the technical side and the construction atmosphere of international authentication system must be created. The work process should be redesigned in order to implement export-import procedures that meet the relevant standards. Second, the improvement of system for electronic process is necessary in the law and institutional aspect. In order to eliminate any obstacles to the trade procedure, clearer legal grounds regarding legitimate controls and minimum necessity must be established. Also, laws should be revised to admit mutual recognition among certification organizations, in lieu of international agreement-based mutual recognition between government. Third, the detailed improvement for the integration of the electronic trade infrastructure will be demanded. Additionally, user-centered quality management protocols should be established via connections with the systems already existing in governmental bodies. Fourth, various trade institution should harmonized and interconnected with other partners through mutual cooperation for standardization of operational system. A system which can monitor and remotely diagnose and resolve system errors should be established to provide tailor-made service and improve operational efficiency. At the same time, it is necessary to build a cooperative system to share information and promote comprehensive management for efficient operation.

• The Journal of the Convergence on Culture Technology
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• v.6 no.3
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• pp.105-109
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• 2020

The Future Army in 2050 should prepare for various future threats and effectively utilize its superintelligence and hyper-connected weapons systems to develop ways of fighting new concepts to dominate multi-regional battlefields and achieve victory. First, the establishment of active and offensive military strategies based on ability. Second, the battle of central strike for enemy combat will paralysis. Third, the battle of simultaneous integrated mosaic using multidisciplinary areas. Fourth, cyber warfare based on artificial intelligence that transcends time and space. Fifth, Combined Platform War. After all, future wars will be won or lost by invisible wars on cyber space.

• Journal of Microbiology and Biotechnology
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• v.23 no.6
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• pp.779-784
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• 2013

Leptospirosis is a worldwide zoonosis of global concern caused by Leptospira interrogans. The availability of ligand libraries has facilitated the search for novel drug targets using chemogenomics approaches, compared with the traditional method of drug discovery, which is time consuming and yields few leads with little intracellular information for guiding target selection. Recent subtractive genomics studies have revealed the putative drug targets in peptidoglycan biosynthesis pathways in Leptospira interrogans. Aligand library for the murD ligase enzyme in the peptidoglycan pathway has also been identified. Our approach in this research involves screening of the pre-existing ligand library of murD with related protein family members in the putative drug target assembly in the peptidoglycan biosynthesis pathway. A chemogenomics approach has been implemented here, which involves screening of known ligands of a protein family having analogous domain architecture for identification of leads for existing druggable protein family members. By means of this approach, one murC and one murF inhibitor were identified, providing a platform for developing an anti-leptospirosis drug targeting the peptidoglycan biosynthesis pathway. Given that the peptidoglycan biosynthesis pathway is exclusive to bacteria, the in silico identified mur ligase inhibitors are expected to be broad-spectrum Gram-negative inhibitors if synthesized and tested in in vitro and in vivo assays.

• Journal of Information Technology Applications and Management
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• v.26 no.3
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• pp.135-157
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• 2019

Information technology has economic, social and cultural impacts is closely linked to our lives. This information technology is becoming a key to the change of human civilization through connecting people and objects on the earth. In addition, future information technology is becoming more intelligent and personalized with the development of computing technology, and due to the rapid development of alcohol, environment without time and space constraint is realized, Is spreading. Since existing portable storage media are made of physical form, there is a limit to usage due to the risk of loss and limitation of capacity. Cloud services can overcome these limitations. Due to the problems of existing storage media, it is possible to overcome the limitations of storing, managing and reusing information through cloud services. Despite the large number of cloud service users, the existing research has focused mainly on the concept of cloud service and the effect of introduction on the companies. This study aims to conduct a study on individual characteristics that affect the degree of cloud use. We will conduct research on the causes of IT knowledge, personal perception of security, convenience, innovation, economical trust, and platform dependency affecting the intention to use the cloud. These results show that the variables affecting individual 's use of cloud service are influenced by individuals, and this study can be used as a basic data for individuals to use cloud service.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2017.11a
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• pp.1305-1319
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• 2017

정보통신(ICT)혁명에 이어 사람이 기존에 수행하던 일을 사람의 도움 없이 자동화시킬 수 있는 기술들이 4차 산업혁명의 핵심 기술로 등장하고 있다. 4차 산업혁명이 현재 산업의 지형도와 경제 사회 패러다임의 변화를 촉진하고 있는 것은 주지의 사실이며, 이에 따라 4차 산업혁명에 주요 추동력(driving force)을 제공하고 있는 핵심 플랫폼 기술 5개(인공지능, 빅데이터, 사물인터넷, 클라우드 컴퓨팅, 3D 프린팅)를 선별하여 글로벌 연구동향과 한국의 연구 수준을 파악하였다. 5개 기술에 대해 Elsevier사의 SCOPUS DB를 기반으로 최근 5년 간의 학술연구논문의 출판 현황을 분석하는 한편, 한국연구재단에서 지원된 과제 현황을 조사하였다. 이를 바탕으로 5개 기술별로 국제적 연구 수준과 주요 리딩 연구기관을 파악하였으며, 4차 산업혁명에 대응하는 연구개발의 정책적 시사점을 도출하고자 하였다. 5개 기술에 대해 미국과 중국이 선도하고 있으며, 영국, 독일, 프랑스, 이탈리아 등의 유럽 국가와 일본, 인도, 한국 등이 추격 그룹을 형성하고 있었다. 한국은 HW 대비 SW분야의 연구 경쟁력이 상대적으로 취약하였으며, 전반적으로 연구 수준의 질적 향상이 필요함을 확인하였다.