• Journal of Korea Water Resources Association
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• v.54 no.spc1
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• pp.1071-1081
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• 2021

In addition to the current quality control procedures for the weather observation performed by the Korea Meteorological Administration (KMA), this study proposes quality inspection standards for Internet of Things (IoT) urban weather observed data based on machine learning that can be used in smart cities of the future. To this end, in order to confirm whether the standards currently set based on ASOS (Automated Synoptic Observing System) and AWS (Automatic Weather System) are suitable for urban weather, usability was verified based on SKT AWS data installed in Seoul, and a machine learning-based quality control algorithm was finally proposed in consideration of the IoT's own data's features. As for the quality control algorithm, missing value test, value pattern test, sufficient data test, statistical range abnormality test, time value abnormality test, spatial value abnormality test were performed first. After that, physical limit test, stage test, climate range test, and internal consistency test, which are QC for suggested by the KMA, were performed. To verify the proposed algorithm, it was applied to the actual IoT urban weather observed data to the weather station located in Songdo, Incheon. Through this, it is possible to identify defects that IoT devices can have that could not be identified by the existing KMA's QC and a quality control algorithm for IoT weather observation devices to be installed in smart cities of future is proposed.

• Journal of Internet of Things and Convergence
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• v.2 no.3
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• pp.31-35
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• 2016

IoT technologies have been rapidly developed in recent years, and applied to many industries. In the field of fisheries, the water quality management system have been developed, helping in improving productivity and working environment. In this paper, we have designed the smart feeding system, interoperable with the water quality system, using LPWA network. LPWA network is an IoT network, which is appropriate to fish farms because of its wide area coverages and low power consumption. We expect this work to contribute to developing the aquaculture technology through the big data analysis with the accumulated data.

• Proceedings of the Korean Society of Computer Information Conference
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• 2015.01a
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• pp.93-94
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• 2015

최근 산업 현장에서 재해는 설비의 다양화, 인적 구성의 복잡성, 작업환경의 변화 등으로 다양하게 발생되고 있다. 특히 경제적 자립도가 취약한 중소기업에서는 관리능력이 미흡하여 안전에 대한 조직 및 관리, 교육 등이 큰 문제점으로 대두되고 있다. 우리나라의 안전관리의 현실은 대기업 중심으로 이루어지고 있는 실정이나 재해율은 일본 등 주변국보다 2~4배 높은 수준으로 선진국에 비해 아직도 매우 심각한 문제이다. 한편, 환경과 재난방지, 헬스케어 등과 같은 분야에 널리 활용되고 있는 고도화된 IoT 기술은 최근 빌딩, 도시 관제 시스템뿐만 아니라 산업 현장의 설비와 인력관리 등 IoT 기술의 활용이 활발해지는 추세다. 본 논문에서는 IoT를 활용한 기술 개발을 통해 다양한 분야의 산업현장에 산재하고 있는 각종 위험인자를 포함하여 작업자의 근로 환경 정보를 영상 및 센싱 데이터를 이용하여 인지하고 작업자에게 현장 위해요인을 파악함으로써 합리적인 대책의 마련을 통해 작업자의 안전을 보장하고, 이와 더불어 업무지원 정보를 실시간으로 제공하여 인명피해의 감소, 작업능률과 생산성 향상을 야기할 수 있는 스마트 안전제어 및 원격 업무 지원을 위한 지능형 산업안전 관리 시스템을 개발하였다.

• Journal of Information Technology Services
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• v.21 no.6
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• pp.21-37
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• 2022

Due to the development of technology and medical care following the 4th industrial revolution, the medical paradigm is shifting towards patient-centered medical services. Based on the development of smart home technology, the residential environment is changing into a residential space that cares for and heals the lifestyles and the healthcare of families. As lifestyle changes, the concept of supporting smart home care based on the residential environment is making it possible to build a smart home IoT service design with enhanced accessibility and convenience for medical appointments and well-being lifestyle care. This paper is a study on user-centered health care smart home IoT service design suitable for family members based on the health care, beauty care, exercise care, and customized diet care beyond the conventional concept of health care monitoring. Based on the analysis, this paper proposes a personal care coordinate smart home service design in a human-centered wellness clinic care smart home service design environment. Human-centered wellness clinic smart home IoT service design is meaningful in presenting a vision for research on smart home service design that links hospital-linked and care-linked service industries, which should be considered from the smart home construction planning stage.

• KIPS Transactions on Software and Data Engineering
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• v.11 no.6
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• pp.229-236
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• 2022

Based on the Internet of Things, a web system that can check the condition around the fire extinguisher, whether a fire has occurred, and an application that can receive fire notifications in real time is implemented. Minimize errors that occur during development by using software engineering to clarify the goals of the system and define the structure in detail. In addition, for IoT-based fire extinguishers, a method of reducing defects by finding product defects in the demand analysis, design, and implementation stages and analyzing the cause thereof is proposed. Through the proposed research, it is possible to secure the reliability of defect management for IoT-based smart fire extinguisher.

• Journal of Digital Convergence
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• v.14 no.11
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• pp.501-505
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• 2016

Recently, the frequency of dealing important information regarding financial services like paying through smart device or internet banking on smart device has been increasing. Also, with the development of smart device execution environment towards open software environment, it became easier for users to download and use random application software, and its security aspect appears to be weakening. This study inspects features of hardware-based smart device security technology. Furthermore, this study proposes a realization method in MTM hardware-based secure smart device execution environment for an application software that runs in smart devices. While existing MTM provides the root of trust function only for the mobile device, the MTM-based mobile security environment technology proposed in this paper can provide numerous security functions that application program needs in mobile device. The further researches on IoT devices that are compatible with security hardware, gateway security technology and methods that secure reliability and security applicable to varied IoT devices by advancing security hardware are the next plan to proceed.

• Convergence Security Journal
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• v.22 no.1
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• pp.71-79
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• 2022

The smart grid system has emerged to maximize energy efficiency through real-time information exchange between power providers and consumers by combining information technology and power supply systems. The authentication schemes using blockchain in a smart grid system have been proposed, which utilize an edge server's architecture to collect and store electric power-related information and process data between a central cloud server and smart grid-IoT devices. Although authentication schemes are being proposed to enhance security in the smart grid environment, many vulnerabilities are still reported. This paper presents a new mutual authentication scheme to guarantee users' privacy and anonymity in a smart grid based on edge computing using blockchain. In the proposed scheme, we use the smart contract for the key management's efficiency, such as updating and discarding key materials. Finally, we prove that the proposed scheme not only securely establishes a session key between the smart grid-IoT device of the user and the edge server but also guarantees anonymity.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.41 no.12
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• pp.1942-1949
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• 2016

This paper proposed automatic path-tracing methods for Flying Disc Golf by adopting IoT comcepts at smart-marker. We tried to implement service system by making database. Smart-marker's configurations & roles are proposed. By making test-boards and adoption to various Flying Disc Golf games, the efficiency is proved. The positions and distances captured by the smart-marker are transferred to the smart-pole per each hole. The smart-pole captured them and transfers to web-server which is databased them. The result can be searched by web or smartphone in real time.

• Proceedings of the Korea Information Processing Society Conference
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• 2020.11a
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• pp.243-246
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• 2020

스마트 홈 시스템은 앞으로도 계속 기술의 발전과 수요가 증가하는 블루오션 시장이다. IT 시장의 주목을 받는 아이템을 다룬 만큼 이 작품이 높은 발전 가치와 시장성을 보유하고 있다고 볼 수 있다. 스마트 홈 시스템 구축을 통해 개인에게 최적화 된 라이프 스타일을 구축하고, 더 나아가 개인에게 맞는 환경을 설정하여 맞춤 라이프 연계 서비스를 제공한다. 더 나아가 주목받는 이슈인 인공지능 기술을 사용하여 스마트 기기들에 대한 지능형 제어 및 효율적인 관리가 가능하도록 한다. 게이트웨이 서버에 에어컨, 공기청정기 등 우리 실생활과 밀접한 기기들에 연결함으로써 기존의 기기들에 비해 중요한 기기들을 더 높은 빈도로 관리할 수 있다. 이 프로젝트는 스마트 홈의 기본이 되는 통합 제어시스템과 이를 위한 IoT 허브 시스템의 하드웨어를 모두 개발한 프로젝트로써 게이트웨이 서버로 대표 되는 하드웨어를 통해 스마트 기기의 상태를 모니터링 하다가, 특정 센서값을 받으면 액션을 취해줌으로써 스마트기기를 제어할 수 있다. 그리고 이들과 관련하여 IoT 기반의 다양한 기기들을 표준화 제어하기 위한 제어 시스템을 구축하고 이를 위한 소프트웨어도 함께 개발했다.

• Journal of Internet of Things and Convergence
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• v.6 no.4
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• pp.81-87
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• 2020

This paper creates a standard node for acquiring sensor data from various industrial sensors (IoT/non-IoT) for the establishment of Smart Factory Digital Twin, and provides inter-compatible data by linking zones by group/process to secure data stability and to ensure the digital twin (Digital Twin) of Smart Factory. The process of the Zone Master platform contains interface specifications to define sensor objects and how sensor interactions between independent systems are performed and carries out individual policies for unique data exchange rules. The interface for execution control of the Zone Master Platform processor provides system management, declaration management for public-subscribe, object management for registering and communicating status information of sensor objects, ownership management for property ownership sharing, time management for data synchronization, and data distribution management for Route information on data exchange.