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A Dual Security Technique based on Beacon (비콘 기반의 이중 보안 기법)

  • Park, Sang-Min;Kim, Chul-Jin
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.17 no.8
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    • pp.311-317
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    • 2016
  • Many services have been developed that are based on smart devices, and security between devices is emphasized. A beacon on the current IoT(Internet of Things) services has been utilized in the commercial field and is being applied to the services of the home IoT. On the other hand, the beacon is weak to security using Bluetooth-based services. Therefore, it is important to strengthen the security of the beacon. This paper proposes a dual security technique that can enhance the security of beacon-based services. The dual security architecture and security process is proposed based on beacon and authentication service. In addition, mobile application was developed and validated based on the beacon for proving the suitability of the proposed technique. The experimental method for verification are the authentication failure case, such as 1st authentication fail, and authentication success case, such as 1st authentication success and 2nd authentication success. The components of the verification experiments consists of two beacons (matched with Beacon ID, mismatched with Beacon ID), one mobile device and authentication application. This was tested to verify the compatibility of the dual security architecture and 1st/2nd authentication process.

Efficient Braille Keyboard of Smart Phone for the Blind (전맹인을 위한 효율적인 스마트폰 점자키보드 시스템 기술)

  • Koo, Min-Su;Kim, Byung-Gyu;Shin, Hyun-Cheul
    • Convergence Security Journal
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    • v.15 no.2
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    • pp.11-17
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    • 2015
  • According to NIA (National Information Society Agency) report, digital divide is a vicious circle which makes quality interval of human's life between people who have information and relatively not. Especially in a smart phone society, there is a big problem between disabled people and normal people. This paper suggests a braille keyboard system for the blind to solve these problems. It is designed for portable use, convenience and quick text typing based on bluetooth communication technique. In text input test, all texts (Korean, English, number) were accurately expressed and typing speed was about 22 [c/m](characters per a minute). Especially, we design text2voice function to provide more accurate key input system. Popular applications such as call, alarm, message, kakao talk, internet, music, were performed without carring problems using the proposed braille keyboard system. The proposed technique is thought to contribute to eliminating the digital divide through the expansion of smartphone users.

Evaluation of Particle Counting by Smartphone-based Fluorescence Smartscope and Particle Positioning in Spinning Helical Channel (스마트폰 기반 형광 smartscope의 입자계수 및 회전하는 나선형 채널의 입자정렬 성능 평가)

  • Park, Eunjung;Kim, Subin;Cho, Myoung-Ock;Kim, Kyunghoon;Shourav, Mohiuddin Khan;Kim, Sunwook;Lee, Jeonghoon;Kim, Jung Kyung
    • Journal of the Korea Industrial Information Systems Research
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    • v.20 no.3
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    • pp.19-28
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    • 2015
  • With the aim of developing a smartphone-based point-of-care device that is small, inexpensive, and easy to handle by non-expert, we designed a fluorescence smartscope for counting particles and a DC motor-controlled particle positioning system. Our smartscope can count the number of fluorescent particles and fluorescently-stained white blood cells through a phone camera with an adaptor containing a LED, a ball lens and optical filters and an application running on a smartphone. The motor was controlled wirelessly via Bluetooth with an Android smartphone. We found that axial spinning of a helical microfluidic channel allows arrangement of particles having size similar to the white blood cells. The motor-controlled particle positioning system can minimize time-consuming manual processes and automate sample preparation process and thus, if integrated with the smartscope, it can be used for a point-of-care testing device based on a smartphone.

A study on UAV (Unmanned Aerial Vehicle) Real Time Location Tracking Control Using Mobile Communication Network (이동통신망을 이용한 UAV(Unmanned Aerial Vehicle) 실시간 위치 추적 관제 방안에 관한 연구)

  • Choi, Hyun-Taek;Ryu, Gab-Sang
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.10 no.6
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    • pp.535-544
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    • 2017
  • In this paper, to overcome the limitation of information transmission and reception according to the RF system of UAV, it is necessary to check the position of many UAVs in flight on the basis of mobile communication and to make the LTE modem lightweight and low power And UAVs that are in operation are received and controlled. Through this study, we proposed a method to control real-time location tracking by connecting high-resolution images to the network anytime and anywhere. For this purpose, we propose the requirements and requirements of LTE modem using real-time high-speed data communication technology (3G, 4G LTE, Bluetooth) by presenting the communication module system of LTE-based UAV. N:N control system concept and implementation technology(Control system structure, control data flow chart, flight planning and transmission, real-time location tracking).

A Ghost in the Shell? Influences of AI Features on Product Evaluations of Smart Speakers with Customer Reviews (A Ghost in the Shell? 고객 리뷰를 통한 스마트 스피커의 인공지능 속성이 평가에 미치는 영향 연구)

  • Lee, Hong Joo
    • Journal of Information Technology Services
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    • v.17 no.2
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    • pp.191-205
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    • 2018
  • With the advancement of artificial intelligence (AI) techniques, many consumer products have adopted AI features for providing proactive and personalized services to customers. One of the most prominent products featuring AI techniques is a smart speaker. The fundamental of smart speaker is a portable wireless Internet connecting speaker which already have existed in a consumer market. By applying AI techniques, smart speakers can recognize human voices and communicate with them. In addition, they can control other connecting devices and provide offline services. The goal of this study is to identify the impact of AI techniques for customer rating to the products. We compared customer reviews of other portable speakers without AI features and those of a smart speaker. Amazon echo is used for a smart speaker and JBL Flip 4 Bluetooth Speaker and Ultimate Ears BOOM 2 Panther Limited Edition are used for the comparison. These products are in the same price range ($50~100) and selected as featured products in Amazon.com. All reviews for the products were collected and common words for all products and unique words of the smart speaker were identified. Information gain values were calculated to identify the influences of words to be rated as positive or negative. Positive and negative words in all the products or in Amazon echo were identified, too. Topic modeling was applied to the customer reviews on Amazon echo and the importance of each topic were measured by summating information gain values of each topic. This study provides a way of identifying customer responses on the AI feature and measuring the importance of the feature among diverse features of the products.

Implementation of Maritime Telemedicine System Using Android (안드로이드를 이용한 해양원격진료시스템 구현)

  • Lee, Ho-Tae;Kim, Byoung-Chul
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.18 no.6
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    • pp.221-228
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    • 2018
  • The purpose of this study is to design and implement a maritime telemedicine system to provide the best medical service for patients who rescue and happens in sailing ship. For this purpose, INMARSAT and MVAST, which are necessary communication channels for maritime telemedicine, were examined and diversity in maritime communication path was suggested. It was implemented to enable maritime telemedicine by linking smart devices and medical devices for physical examination. The marine telemedicine system adopts the HTTP communication protocol to configure the web server and process the client request. The patient's chart information was entered using an application for AndroidPad and the patient was diagnosed using Bluetooth electronic stethoscope for diagnosis. This system enables appropriate medical treatment to emergency patients at maritime, which ultimately can improve medical services. It is expected to be a more effective medical support system through linkage with various medical equipment.

Design and Implementation of Gas Leakage Alarm IoT System for Safety Helmet (안전모 장착용 가스 누출 경보 IoT 시스템 설계 및 구현)

  • Ju, Yong-Min;Lee, Hyo-Seung;Oh, Jae-Chul
    • The Journal of the Korea institute of electronic communication sciences
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    • v.13 no.6
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    • pp.1411-1416
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    • 2018
  • Currently, most of the industrial areas like chemistry, manufacturing, shipbuilding, and steel, perform the work related to gas, and the staffs who are in charge of this work have a risk of suffocation without cognizing incidents like gas leak. For example, when the nitrogen gas leaked in 2015 at Paju, two people were killed and four people were injured. In 2018 at Pohang, four workers were suffocated to death from nitrogen gas. In order to solve this problem, this study realized the system in which workers could immediately cognize the gas leak and also deliver the situation to the staff in charge of safety at the same time, by installing the IoT device composed of gas sensor and communication module on the safety helmet that should be worn by field workers. This study is expected to be able to reduce the casualties caused by gas leak in industrial sites.

Development of Unmanned Video Recording System using Mobile (모바일을 이용한 무인 영상 녹화 시스템 개발)

  • Ahn, Byeongtae
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.20 no.6
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    • pp.254-260
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    • 2019
  • Recently, a self-camera that generates and distributes a large amount of moving images has been rapidly increasing due to the appearance of SNS such as Facebook, Instagram, and Tweet using mobile. In particular, the amount of SNS connections using mobile phones is significantly increasing in terms of usage, number of connections, and usage time. However, the use of a self-recording system using a smartphone by itself is extremely limited not only in terms of usage but also in frequency of use. In addition, the conventional unattended recording system is a very expensive system that automatically records and tracks an object to be photographed using an infrared signal. Therefore, this paper developed a low cost unmanned recording system using mobile phone. The system consists of a commercial mobile camera, a servomotor for moving the camera from side to side, a microcontroller for controlling the motor, and a commercial wireless Bluetooth earset for video audio input. And it is an unmanned automation system using mobile, and anyone can record image by self image tracking.

Data Error Compensation Estimation Technology for Providing High Quality Contents in IoT Environment (IoT 환경에서 고품질 콘텐츠 제공을 위한 데이터 오류 보상 추정 기술)

  • Kim, Jeong Su
    • The Journal of the Convergence on Culture Technology
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    • v.5 no.3
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    • pp.333-338
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    • 2019
  • Cultural contents are the most important factor in high speed and high quality data communication. High-quality content includes VR and AR technology, and a variety of high-quality content can be streamed over wireless mobile phones via smartphones. In addition, network and wired/wireless communication are inevitably required in an Internet of Things (IoT) environment in which things are connected to a wireless Internet. IoT is used in various network technologies such as 4G, 5G mobile communication, WIFI wireless LAN, Bluetooth and so on. It is a technology that can use the connection between things anytime, anywhere, and can be achieved in a wireless mobile communication environment. Therefore, in this paper, we study data error compensation estimation method which can reduce data error based on mobile communication channel environment analysis so that high quality contents can be serviced even in high speed mobile environment.

A Case Study on the Implementation of Tele-Operation Robot Hand by Learning Factory based Technology Convergence Education (러닝팩토리기반 기술융합교육을 통한 텔리 오퍼레이션 로봇핸드 구현 사례 연구)

  • Hong, Chang-Ho;Lee, Jung-Hoon;Kim, Hyung-O
    • Journal of Practical Engineering Education
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    • v.10 no.2
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    • pp.113-118
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    • 2018
  • The most important thing in vocational education and training is to enhance students' interest and understanding of the whole process of the production site. In this paper, we present a case on the implementation of tele-operation robot hand by learning factory based technology convergence education. It also suggests some points to be taken when applying the learning factory in the future curriculum. In order to implement the tele-operation robot hand, it is necessary to support the compulsory subjects of university level courses in domestic curriculum such as mechanic design, motor control, local communication implementation, sensing and feedback control. The educational research presented in this paper guides the students with the skills they need and understands the skills through self-study and practice, and implements the final products. This study will be useful as a base data when introducing the training process of training factory in the future.