• Title/Summary/Keyword: Technology Revolution

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Development of Path Tracking Algorithm and Variable Look Ahead Distance Algorithm to Improve the Path-Following Performance of Autonomous Tracked Platform for Agriculture (농업용 무한궤도형 자율주행 플랫폼의 경로 추종 및 추종 성능 향상을 위한 가변형 전방 주시거리 알고리즘 개발)

  • Lee, Kyuho;Kim, Bongsang;Choi, Hyohyuk;Moon, Heechang
    • The Journal of Korea Robotics Society
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    • v.17 no.2
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    • pp.142-151
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    • 2022
  • With the advent of the 4th industrial revolution, autonomous driving technology is being commercialized in various industries. However, research on autonomous driving so far has focused on platforms with wheel-type platform. Research on a tracked platform is at a relatively inadequate step. Since the tracked platform has a different driving and steering method from the wheel-type platform, the existing research cannot be applied as it is. Therefore, a path-tracking algorithm suitable for a tracked platform is required. In this paper, we studied a path-tracking algorithm for a tracked platform based on a GPS sensor. The existing Pure Pursuit algorithm was applied in consideration of the characteristics of the tracked platform. And to compensate for "Cutting Corner", which is a disadvantage of the existing Pure Pursuit algorithm, an algorithm that changes the LAD according to the curvature of the path was developed. In the existing pure pursuit algorithm that used a tracked platform to drive a path including a right-angle turn, the RMS path error in the straight section was 0.1034 m and the RMS error in the turning section was measured to be 0.2787 m. On the other hand, in the variable LAD algorithm, the RMS path error in the straight section was 0.0987 m, and the RMS path error in the turning section was measured to be 0.1396 m. In the turning section, the RMS path error was reduced by 48.8971%. The validity of the algorithm was verified by measuring the path error by tracking the path using a tracked robot platform.

Introduction and Analysis of Open Source Software Development Methodology (오픈소스 SW 개발 방법론 소개 및 분석)

  • Son, Kyung A;Yun, Young-Sun
    • Journal of Software Assessment and Valuation
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    • v.16 no.2
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    • pp.163-172
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    • 2020
  • Recently, concepts of the Fourth Industrial Revolution technologies such as artificial intelligence, big data, and cloud computing have been introduced and the limits of individual or team development policies are being reviewed. Also, a lot of latest technology source codes have been opened to the public, and related studies are being conducted based on them. Meanwhile, the company is applying the strengths of the open source software development methodology to proprietary software development, and publicly announcing support for open source development methodology. In this paper, we introduced several software development methodology such as open source model, inner source model, and the similar DevOps model, which have been actively discussed recently, and compared their characteristics and components. Rather than claiming the excellence of a specific model, we argue that if the software development policy of an individual or affiliated organization is established according to each benefit, they will be able to achieve software quality improvement while satisfying customer requirements.

Smoke Modeling and Rendering Techniques using Procedural Functions (절차적 함수를 이용한 연기 모델링 및 렌더링 기법)

  • Park, Sang-Hyun
    • The Journal of the Korea institute of electronic communication sciences
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    • v.17 no.5
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    • pp.905-912
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    • 2022
  • Virtual reality, one of the core technologies of the 4th industrial revolution, is entering a new phase with the spread of low-cost wearable devices represented by Oculus. In the case of disaster evacuation drills, where practical training is almost impossible due to the risk of accidents, virtual reality is becoming a new alternative that enables effective training. In this paper, we propose a smoke modeling method that can be applied to fire evacuation drills implemented with virtual reality technology. In the event of a fire, smoke spreads along the aisle, and the density of the smoke changes over time. The proposed method models the smoke by applying a procedural function that can reflect the density of smoke calculated through simulation to the model in real-time. Implementation results in the background of the factory show that the proposed method produces models that can express the smoke according to the user's movement.

Study on FOCUS Teaching & Learning Model for Improving Digital Competency of Freshmen of Early Childhood Education Department

  • Ha, Yan
    • Journal of the Korea Society of Computer and Information
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    • v.27 no.8
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    • pp.263-269
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    • 2022
  • This study is to propose a FOCUS Teaching & Learning model to educate pre-service early childhood teachers and in the era of convergence and integration and the Fourth Industrial Revolution. In an era where the use of digital technology is maximized due to COVID-19, boundaries of each fields are blurred and convergence is emphasized, a teaching and learning model is needed to strengthen capabilities of freshmen at colleges that train specialists. This study proposes ways to vitalize ICT education in early childhood education and proposes an integrated teaching and learning model. Through this model, pre-service early childhood teachers will be able to enhance their digital capabilities and contribute to the field of early childhood education by producing video content, activities and teaching aids to be provided to early childhood education institutions. In addition, the model can be applied to areas other than early childhood education to improve digital capabilities through video production and utilization.

AWGN Removal using Laplace Distribution and Weighted Mask (라플라스 분포와 가중치 마스크를 이용한 AWGN 제거)

  • Park, Hwa-Jung;Kim, Nam-Ho
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.25 no.12
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    • pp.1846-1852
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    • 2021
  • In modern society, various digital devices are being distributed in a wide range of fields due to the fourth industrial revolution and the development of IoT technology. However, noise is generated in the process of acquiring or transmitting an image, and not only damages the information, but also affects the system, causing errors and incorrect operation. AWGN is a representative noise among image noise. As a method for removing noise, prior research has been conducted, and among them, AF, A-TMF, and MF are the representative methods. Existing filters have a disadvantage that smoothing occurs in areas with high frequency components because it is difficult to consider the characteristics of images. Therefore, the proposed algorithm calculates the standard deviation distribution to effectively eliminate noise even in the high frequency domain, and then calculates the final output by applying the probability density function weight of the Laplace distribution using the curve fitting method.

Role and Task of Nurses in the Visiting Health Services at the Public Health Center: Focusing on the Elderly (노인대상 보건소 방문건강관리사업 간호사의 역할과 직무)

  • Han, Young Ran;Park, Eun A;Bang, Mi Ran;An, Na Won
    • Journal of Korean Public Health Nursing
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    • v.35 no.3
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    • pp.430-447
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    • 2021
  • Purpose: The purpose of this study was to analyze the role and tasks of nurses who were working for the elderly in the visiting health services at the public health centers. Methods: Literature reviews, two rounds of meetings with 5 experts and a two-round Delphi technique with 15 experts were performed in this study. Results: The nurses' role and job analysis revealed 5 roles, 16 duties and, 71 tasks. The nurses' roles, including discovery and registration of households/groups in visiting health service in the community, case manager, administrative management, program planning, operation and evaluation, and development of job competency. Sixteen duties included client registration and management, need assessment and plan establishment, education, consultation and support, seasonal health care, prevention and monitoring of infectious diseases, basic nursing care, chronic disease management, linkage and utilization of resources, team cooperation and coordination, home environment management, monitoring and support for intervention outcomes, evaluation, administrative management, program planning, operation and evaluation, development of professional competency and, adoption of fourth industrial revolution technology. Conclusions: Based on the results, the government should provide sufficient nursing personnel to provide universal preventive health services for the elderly and a job training program to perform these roles well.

Evaluation of Modeling Design and Dyeability of DLP 3D Printed Textiles (DLP 3D Printed Textile의 유연성 향상을 위한 모델링 디자인 및 염색성 평가)

  • Shim, Yeon Je;Kim, Hyunjin;Kim, Hye Rim
    • Journal of the Korean Society of Clothing and Textiles
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    • v.46 no.3
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    • pp.375-389
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    • 2022
  • 3D printing has been considered a key technology, leading the fourth industrial revolution. However, 3D printed textile still has a lot of limitations to overcome before it can be adopted as a clothing material in terms of design, flexibility and dyeability. This study aims to provide modeling design for imparting the flexibility and post-dyeing process for 3D printed textiles. The modeling types were designed to test the flexibility of 3D printed textiles. The post-dyeing process was evaluated through dye absorption depending on the resin and modeling types, respectively. The results were as follows: two types of modeling (Modeling A and B) were designed with a ring structure to test the flexibility of the 3D printed textiles. The 3D printed textiles with ring-based structure Modeling A had flexibility regardless of the hardness of resin types. In the dyeability test, softening resin (S-Resin) and hardening resin (H-Resin) were found to have good dyeability with acid dye and direct dye, respectively. The condition of S-Resin with acid dye and H-Resin with direct dye was controlled by dye absorption rate.

A Study on Important Factors of Smart Disaster Prevention usable in Disaster Situations: Focusing on the Difference in Perception between Specialists and Consumers (재난상황시 활용할 수 있는 스마트 방재의 중요요인에 관한 연구: 전문가와 수요자 간 인식차이를 중심으로)

  • Nam, Sung-Kyu;Shin, Seung-Jung
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.22 no.4
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    • pp.177-184
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    • 2022
  • This study attempted to propose a plan to develop smart disaster prevention by applying the technologies of the 4th Industrial Revolution at each stage of disaster management to cope with the catastrophic situation of fire accidents. To this end, 150 disaster prevention experts and disaster prevention consumers were set as research subjects, and research data were collected and statistical analysis was conducted by distributing questionnaires. The main result was that disaster prevention experts and consumers commonly regarded the systematic factors of smart disaster prevention as the most important, and the difference in perception of the importance of each smart disaster prevention component was not statistically significant. Based on these results, this researcher suggested that in order for Korea's smart disaster prevention technology to develop, it is important for many researchers to research individual smart disaster prevention technologies, but above all, systematic R&D on how to manage, integrate them, and apply them in actual situations should be most preemptively.

A Study on the Evaluation Differences of Korean and Chinese Users in Smart Home App Services through Text Mining based on the Two-Factor Theory: Focus on Trustness (이요인 이론 기반 텍스트 마이닝을 통한 한·중 스마트홈 앱 서비스 사용자 평가 차이에 대한 연구: 신뢰성 중심)

  • Yuning Zhao;Gyoo Gun Lim
    • Journal of Information Technology Services
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    • v.22 no.3
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    • pp.141-165
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    • 2023
  • With the advent of the fourth industrial revolution, technologies such as the Internet of Things, artificial intelligence and cloud computing are developing rapidly, and smart homes enabled by these technologies are rapidly gaining popularity. To gain a competitive advantage in the global market, companies must understand the differences in consumer needs in different countries and cultures and develop corresponding business strategies. Therefore, this study conducts a comparative analysis of consumer reviews of smart homes in South Korea and China. This study collected online reviews of SmartThings, ThinQ, Msmarthom, and MiHome, the four most commonly used smart home apps in Korea and China. The collected review data is divided into satisfied reviews and dissatisfied reviews according to the ratings, and topics are extracted for each review dataset using LDA topic modeling. Next, the extracted topics are classified according to five evaluation factors of Perceived Usefulness, Reachability, Interoperability,Trustness, and Product Brand proposed by previous studies. Then, by comparing the importance of each evaluation factor in the two datasets of satisfaction and dissatisfaction, we find out the factors that affect consumer satisfaction and dissatisfaction, and compare the differences between users in Korea and China. We found Trustness and Reachability are very important factors. Finally, through language network analysis, the relationship between dissatisfied factors is analyzed from a more microscopic level, and improvement plans are proposed to the companies according to the analysis results.

Study of Necessity of Advanced Integrated Digital Engineering and Management Tools (선진통합형 디지털 엔지니어링 및 경영 도구의 필요성 연구)

  • Luke (Yang Ouk) Kim;Kyung Ho Lee
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.36 no.1
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    • pp.27-38
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    • 2023
  • How the port, shipping, shipbuilding, and vender industries in Korea can have a seamless value chain through their digitally smooth cooperation by applying the latest information and communications technology through the "4th industrial revolution" was examined. Also considered was the proposition that the value chain should be a smart, seamless value chain among industries with successful hyperconnection. Their cooperative relationships were defined, and the crucial elements for the sustainable development of these industries were considered. As a result, the direction for achieving environmental, social, and governance management by realizing decarbonization through today's digitalization could be studied. In particular, the importance of digitization as a way to respond to the future market from the perspective of small and medium-sized enterprises and the role of digitization realized by small and medium-sized equipment companies in the overall industry were examined. The results simultaneously show the state of linkage between industries and the reason why the value chain must maintain a smooth relationship. In addition, using the lessons learned from recent failure cases from the Korean shipbuilding industry as a cornerstone, the direction for creating a strategic pathway for intelligent connection was investigated.