• Proceedings of the Korea Water Resources Association Conference
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• 2020.06a
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• pp.223-223
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• 2020

하천 조사에 드론의 필요성은 점차 증가하고 있으며, 하천시설 조사 및 하천 물리량 간접 계측 등에 있어서 활용성 또한 증가하고 있다. 드론을 이용한 하천시설 및 하천 조사는 주로 광학 영상에 기초한 간접 계측을 중심으로 활발히 기술 개발이 진행되고 있으며, 최근에는 적용하는 임무장비를 확장하여 초분광카메리나 LiDAR 등을 활용하려는 시도가 활발히 이루어지고 있으며, 관련 기술의 개발도 역시 급격히 진행되고 있다. 이러한 기술 발전을 통해 하천 조사에 있어서 간접 계측의 정확도는 계속하여 증가하고 있으나, 기술의 편리성이나 활용성에 비해 정확도 향상에는 어느 정도 한계가 있으며, 간접 계측에 의한 정확도를 확보하기 위해서는 여전히 직접 계측 결과와 비교를 통한 검보정이 필수적이다. 직접 계측은 첨단 계측기를 사용한다고 하더라도 아직까지 인력에 의한 의존도가 높으며, 측정 효율이 여전히 떨어지고 있어 간접 계측의 편리성을 저하시키는 원인으로 작용하고 있다. 본 연구에서는 드론 기반의 간접 계측이 편리성 및 활용성, 정확도를 올리 수 있는 무인 IoT 수질 측정기를 개발하고자 한다. 무인 IoT 수질 측정기는 드론에서 측정한 자료 검보정 자료 획득을 목표로 하며, 드론으로 측정한 지역에 대한 데이터 검보정 정확도를 향상 시킬 수 있는 측정방안을 고려하고 있으며, 현재 이용 가능한 IoT 통신 모듈의 적용성 및 통신 거리를 고려하여 개발을 진행하고 있다. 특히 데이터 전송을 고려하여 개별 통신 규약 검토를 진행하였으며, 각종 표준을 검토하였다. 통신을 위한 전력 소모를 고려하여 저전력 통신 모듈을 중심으로 검토를 진행하였으며, 하천의 특성을 고려한 수질 측정 지점 결정을 위한 측정 알고리즘을 개발하여 적용하였다.

• Journal of Digital Convergence
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• v.16 no.9
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• pp.179-185
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• 2018

Technology of Internet of Things (IoT) which is receiving the spotlight recently as a new growth engine of Information Communications Technology (ICT) industry in the $4^{th}$ Industrial Revolution needs trustworthiness beyond simple technology of security. IoT devices should consider trustworthiness from planning and design of IoTs so that everyone who develop, evaluate and use the device can measure and trust its security. Increased number of IoTs and long lifetime result in the increased securituy vulnerability due to the difficulty of software patch and update. In this paper, we investigated security and scalability issues of current IoT devices through research of the technical, political and industrial trend of IoT. In order to overcome the limitations, we propose an automatic verification of software integrity utilizing and a political solution to apply cyber killchain based security mechanism using hash which is an element technology of blockchain to solve these problems.

• The Journal of the Korea institute of electronic communication sciences
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• v.12 no.1
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• pp.47-52
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• 2017

This study is BIT(: Bus Information Terminal) features that take advantage of KEPCO eIoT(: energy Internet of Thing) platform, and it's Network configuration is composed of display terminal device, gateway, platform, and the service server. The key features are parts for processing protocol data between the gateway and the device using LoRa(: Long Range) technology, Intelligent applications and SIP(: Session Initiation Protocol) data handling connected to the Taxi reservation system. And the resource tree provided BIT for the service, which commonly used in the application server and the device.

• The Journal of the Korea institute of electronic communication sciences
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• v.11 no.11
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• pp.1107-1112
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• 2016

This study is the Smart Office features that take advantage of KEPCO eIoT(: energy Internet of Thing) platform, and it's Network configuration is composed of sensing device, gateway, platform, and the service server. The key features are parts for processing protocol data between the gateway and the device using LoRa(: Long Range) technology, Intelligent applications and public safety data connected to the PS-LTE(: Public Safety-Long-Term Evolution) system. And the resource tree provided Smart Office for the service, which commonly used in the application server and the device.

• The Journal of the Korea institute of electronic communication sciences
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• v.14 no.4
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• pp.723-728
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• 2019

Citizens' distrust of water pollution is very high in tap water that we routinely drink. In addition, water pollution accidents of tap water are difficult to predict and the risk is high, so real-time monitoring and management are needed. Therefore, it is necessary to introduce real-time water quality monitoring using the Internet of things(IoT). Residual chlorine is more persistent and economical than other disinfectants and it is easy to check residual effect, so it is mainly used as a disinfection index in waterworks. It can be monitored in real time by using IoT technology in order to secure the safety of tap water. In this study, we developed smart device for real-time water quality monitoring using amperometry sensor and analyzed its performance.

• Smart Media Journal
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• v.3 no.3
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• pp.20-25
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• 2014

This research proposes a concept of multi-aspect Social IoT platform that enables human, machine and service to communicate smoothly among them, as well as a means of an automatic process for transforming exiting domain knowledge representation to generic ontology representation used in the platform. Current research focuses on building a machine-based service interoperability using sensor ontology and device ontology. However, to the best of our knowledge, the research on building a semantic model reflecting multi-aspects among human, machine, and service seems to be very insufficient. Therefor, in the research we first build a multi-aspect ontology schema to transform the representation used in each domain as a part of IoT into ontology-based representation, and then develop an automatic process of generating multi-aspect IoT ontology from the domain knowledge based on the schema.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.10 no.1
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• pp.46-56
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• 2017

Recently, the spread of IoT technology has been spreading, and it has been applied to all industrial fields such as home / home appliance / medical care. Due to the low specification, low power consumption characteristic and communication data characteristic of IoT, implementation of existing algorithm is difficult thing. From this reason, we have proposed for the first time that encryption and decryption can be proceeded by introducing a kind of variable length bit XOR operation method which changes a variable the bit length value by using carry up and carry down method. We confirmed the practicality of encrypting short message data frequently processed by IoT device / QR code / RFID / NFC without changing the size of data before and after encryption.

• Journal of the HCI Society of Korea
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• v.12 no.4
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• pp.57-64
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• 2017

The user-centered design paradigm shift and the emergence of user-experience design have also increased the importance of user experience with products and services in specific spaces. In addition, with the advent of IoT services, new changes in the future work environment are expected. This study aims to propose a new user experience design considering the context of future work space. First of all, we examined the concept and nature of IoT, and defined various factors that affect the future work environment and grasped the relation of each element. Next, user research in the current work environment was conducted to identify the context that affects the behavior of users in various types of work environments, and to insight the possibility of a new user experience in the future work environment. Based on the above analysis and insights, various context models for a new future work environment were constructed, and UX models and UX scenarios and alternatives were presented. This study will contribute to the diversity of UX design research by expanding the viewpoint of UX design from device to space and context, and it will contribute to the collaborative research with space design and service design, also interdisciplinary research with IoT service related field.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.10
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• pp.1943-1949
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• 2017

In recent years, the maker culture has realized the concept of 'making' itself through the latest technology of high technology. It is rapidly spreading as a maker's movement by sharing the production methods and information of individuals through the Internet. Countries that are leading the makers' movement expect the maker's movement to be the driving force for new value creation and economic growth from the point of view of things and the Internet. We are developing various types of open IoT platforms that can register various Internet devices and services manufactured and developed through DIY and realize interoperable services. Typical open IoT platforms require specialized API analysis capabilities and difficult access to general users due to difficult platform registration conditions and procedures. In this paper, we try to construct an open IoT platform that can be operated as a real service by creating a simple Internet application device and service application from a general manufacturer's point of view.

• Journal of Digital Convergence
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• v.17 no.12
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• pp.235-241
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• 2019

The structure of the IoT can be divided into devices, gateways, and servers. First, the gateway collects data from the device, and the gateway sends data to the server through HTTP protocol, Websocket protocol, and MQTT protocol. The processing server then processes, analyzes, and transforms the data, and the database makes it easy to store and use this data. These IoT services are basically centralized structures with servers, so attacks on the entire platform are concentrated only on the central server, which makes hacking more successful than distributed structures. One way to solve this problem is to develop IoT that combines blockchain. Therefore, the proposed research suggests that the blockchain is a distributed structure, in which blocks containing small data are connected in a chain form, so that each node agrees and verifies the data with each other, thereby increasing reliability and lowering the probability of data forgery.