모바일 기반의 기기(스마트폰, 스마트 패드, 태블릿PC 등)들을 이용한 학습 앱 사용이 늘어나면서 많은 학습 앱 콘텐츠가 모바일 환경(앱 스토어나 구글 플레이)에서 구현되고 있다. 그러나 스마트폰 시장의 성장이 다양한 모바일 앱을 사용할 수 있는 밑거름이 되었지만 한편으로는 무분별한 유포가 앱의 품질 저하로 이어져 앱 사용자경험의 만족 및 품질에 대한 관심과 평가가 주목받게 되었다. 본 연구는 모바일 기반의 학습 앱의 사용자경험과 품질이 사용자만족과의 구조 및 영향관계를 파악하고자 먼저, 기존 문헌과 선행연구를 통해 이론적 고찰을 하고 모바일 기반의 학습 앱 경험이 있는 남녀 직장인 및 대학생 100명을 대상으로 사용자경험, 품질, 만족에 관한 설문지를 진행하였다. 그리고 각각 측정 변수들의 요인 분석 및 신뢰도 분석, 다중회귀분석, 매개분석을 통해 사용자경험과 품질이 만족에 미치는 영향을 검증하였다. 그 결과, 모바일 기반의 학습 앱 사용자경험이 만족에 정(+)의 영향을 미치는 것으로 나타났으며, 사용자경험이 만족에 정(+)의 영향을 미치는데 있어 시스템 품질이 매개역할을 하는 것으로 나타났다.

The purpose of the safety inspection is to identify the cause of the damage, which is the cause of the safety and performance degradation of the structures, to identify the cause of the damage, and to suggest appropriate repair and strengthening methods. In the traditional safety inspection procedure, the inspection items are selected and the survey contents are recorded in the field book at the time of the field survey. It is not easy to accumulate data and analyze these data as a single project. In this paper, we analyze the problems of the existing facility inspection procedures and conducted studies to build two-way facility safety management system for shortening the processing time and convenience of increasing the efficiency of field work and reporting.

The objective of this study is to develop a bridge maintenance system utilizing NFC(near field communication) technology and mobile devices to enhance maintenance efficiency. The system consist of web program and mobile application. Web program was developed using java programming language that is object-oriented, and mobile application was developed using hybrid app that runs inside of a native container and leverages the device’s web browser to display locally hosted HTML pages. In additionally, this system had been designed to improve system usability and on-site applicability for convenient GUI (graphic user interface) environment.

2015 China's mobile payment record over $258 billion, and first mark 2310 billion dollars of U.S. mobile payment. In particular, since 2000 China's Internet, e-commerce and mobile market is growing explosively. Internet related sectors was a rapid economic growth and more than 30 percent, got the active state support measures, through the “Plus the Internet” of the Chinese government key industrial development. China has have 800 million and the number of Chinese Internet Users and one billion persons of smartphone holder. However, Chinese Internet market is foreign half closed, and exclusive to the market. Nation's leading Internet companies in Korea, Naver coperation and KaKao co. as well as a global company Google, Facebook also be limited to advance in China. China's, a leading internet companies has grown explosively, self-reliance and to increasing thier size in the Chinese government's aggressive Internet service business of protection policy. China, which not only change rapidly, go to the variety of online services market, fast growth and a third party payment service market. Among them, not deterred by the place, and growing mobile payments market is getting attention with high convenience. China grew into 14 trillion won and mobile payment market in 2014,China Mobile payments the world No.1 mobile payment market by 2015 surpassed U.S.A. Third party payment services online purchase of goods and large discount stores as well as payment services O2O, restaurant food expenses payment and money transfers, electricity, as well as the gas bill, even street vendors roasted sweet potato, third-party mobile payments service when purchasing in China to the point where I could make a deal through the mobile payment services, are becoming popular. “cash - debit card - credit cards – mobile payments” general financial patterns that lead to beyond directly to mobile payments in cash, debit card, ChinaEnough to outshine even when they preferred The credit card market trends and status of the development of mobile payments do not have on the market. Followed by China sns and representatives of the game maker, Tencent wichaet tenpei you go to pay 490 million in second place, China Federation of Banks that 500 million Union number of customers, renobo, Laka, Pay, Baidu's Wallet Baidu, Suning's ipuba, Oga, Wonjuk on the market share. But by 2017 industry in China smartphones to 1.5 billion units expected to increase its reserves to sustained competition and innovation is expected to come out because it is a promising market.

In this study, Levee Visual Inspection and Water Level Detection System was developed to handle visual inspection information on the levee effectively by using mobile/intelligent CCTV system. This system will be used to manage levee reasonably, in order to prevent disaster in the riparian areas preemptively on the base of management task.

본 연구는 하천 제방의 취약성을 평가하고, 이를 GIS(Geography Information System) 기반의 시스템으로 구축하여 재해 예방 및 피해 저감 활동에 필요한 의사결정 정보를 제공하는 것을 목표로 한다. 하천 제방에 대한 취약성을 평가하기 위하여 제방에 대한 6가지 지표(수위파형, 파이핑/활동, 제체 및 기초지반의 재료특성, 제체 세굴, 육안점검, 액상화)를 정의하며, 각각의 지표에 대한 평가 등급(1~3등급)을 도출하여 이를 기반으로 하천 제방의 취약도 종합지표를 도출한다. 육안점검을 제외한 5개 지표는 각 항목 별 실험 및 DAM(Dike strength Analysis Module) 프로그램을 이용한 평가 관계식에 근거하여 등급이 도출되며 육안점검 지표의 경우 DGPS/증강현실 기반의 모바일 현장점검 시스템을 활용하여 사용자가 현장에서 제방의 육안점검 항목을 입력하면 자동적으로 해당 제방의 육안점검 등급을 도출할 수 있도록 구현한다. 아울러 지능형 CCTV 및 증강 현실 기법을 적용한 수위계측시스템을 개발하여 제방 수위의 자동 상시감시 체계를 구축하여 선제적인 하천 재해 예방 및 재해 관련 업무 담당자의 의사결정을 지원하며, 제방취약성 평가를 위한 자료로 활용한다. 마지막으로 본 연구의 목표인 모바일 기반의 양방향 제방취약성 평가 시스템 분석 결과의 정확도/신뢰도 향상을 위하여 향후 TB(Test-Bed) 지역을 대상으로 하는 시스템의 적용 및 관계식 개선 등의 추가적인 연구가 필요하다.

Recently the use of smart phones and mobile devices is increasing rapidly, data search and retrieval in the mobile environments are generalized. There are only few mobile applications available in the area of agriculture while huge amount of new applications are developed and uploaded. The purpose of this study was to develop the android based mobile application for providing agricultural infrastructure and disaster information. The mobile application was designed through the database establishment and management system, server management system, and mobile application development. The database is composed of weather data, agricultural infrastructure data, and agricultural disaster data. By developing the mobile application which provides agricultural infrastructure information, it is expected to improve the accessibility to agricultural information and mitigate the agricultural disaster damages.

최근 도심지 건축공사에서는 주변건물이나 시설물의 안전을 확인하기 위해 실시하는 기존 계측관리의 문제점을 극복하고, 안전성을 파악하여 위험요소로부터 신속히 대처하기 위한 실시간 계측 시스템의 도입이 필수적이다. 특히 건설현장에 인접한 지하철 시설은 가장 주요한 계측관리 대상으로 조사되었으며, 진동과 균열, 기울기의 실시간 계측을 통한 현장 안전 관리가 필요한 것으로 나타났다. 하지만 인접 시설물의 안전성을 계측관리하기 위한 실시간 계측시스템 구축에 대한 연구는 미흡한 실정이며, 특히 최근 보편화 된 스마트폰과 연동할 수 있는 시스템의 구축에 대한 연구는 전무한 실정이다. 따라서 본 연구에서는 인접 지하철 시설물의 계측관리에 모바일 기술 적용한 실시간 자동계측시스템을 구축하여 주변시설물의 안전성을 실시간으로 확인 하는 것을 목적으로 한다. 본 시스템에 이용되는 계측장비는 진동 측정기, EL-BEAM, 균열계, 자동계측기로 구성하였으며, 계측 결과값의 장거리 송수신을 위한 CDMA모뎀, 서버 PC, 모니터링 PC, 스마트폰으로 구성하였다. 실시간 자동계측 시스템과 기존 수동적 계측관리 시스템 대비 효과를 분석할 뿐만 아니라 현장 관리자의 신속한 의사결정 수단이 될 것으로 사료된다. 본 연구를 토대로 최근 산업 전반에 걸쳐 활성화되고 있는 모바일 기술을 현장계측에 적용함으로서 건설기술과 모바일 기술의 융합발전에 기여할 수 있을 것이다.

This paper propose a localization system of indoor mobile robots. The localization system includes camera and artificial landmarks for global positioning, and encoders and gyro sensors for local positioning. The Kalman filter is applied to take into account the stochastic errors of all sensors. Also we develop a dead reckoning system to estimate the global position when the robot moves the blind spots where it cannot see artificial landmarks, The learning engine using modular networks is designed to improve the performance of the dead reckoning system. Experimental results are then presented to verify the usefulness of the proposed localization system.

In many industries, the accurate and quick checking of goods in storage is of great importance. Most today's inventory checking is based on bar code scanning, but the relative position between a bar code and an optical scanner should be maintained in close distance and proper angle for the successful scanning. This requirement makes it difficult to fully automate the inventory information/control systems. The use of RFID technology can be a solution for overcoming this problem. The mobile robot presented in this paper is equipped with an RFID tag scanning system, that automates the otherwise manual or semi-automatic inventory checking process. We designed the robot system in a quite practical approach, and the developed system is close to the commercialization stage. In our experiments, the robot could collect information of goods stacked on shelves autonomously without any failure and maintain corresponding database while it navigated predefined paths between the shelves using vision.

This paper proposes a robust image stabilization system for a mobile robot using an Extended Kalman Filter (EKF). Though image information is one of the most efficient data used for robot navigation, it is subjected to noise which is the result of internal vibration as well as external factors such as uneven terrain, stairs, or marshy surfaces. The camera vibration deteriorates the image resolution by destroying the image sharpness, which seriously prevents mobile robots from recognizing their environment for navigation. In this paper, an inclinometer was used to measure the vibration angle of the camera system mounted on the robot to obtain a reliable image by compensating for the angle of the camera vibration. In addition the angle prediction obtained by using the EKF enhances the image response analysis for real time performance. The experimental results show the effectiveness of the proposed system used to compensate for the blurring of the images.

하역장치가 장착된 모바일하버 선박은 새로운 해상운송시스템 개념으로, 특정 정박지에서 대형 컨테이너 선박에 계류하여 해상상태 3 이하 조건에서 신속하면서 효율적인 컨테이너 하역작업을 수행하는 것이다. 모바일하버와 관련한 주요 연구로는 고속하역시스템, 부유체 구조 설계, 안벽하역시스템 해석 및 작업크레인 설계 등의 원천기술 개발을 중심으로 수행되었다. 본 연구는 모바일하버 선박의 하역작업 중 동적안정성 확보를 위한 계류안정화시스템을 개발하고자 하는 것으로, 국내외 계류장치에 대한 현황 분석을 기초로 현재 선박에 탑재되어 있는 의장장치인 윈치시스템에 계류안정화 기능을 추가시킨 포지셔닝윈치를 개발하여 모선과의 상대운동을 최소화하는 방안에 대한 개념설계를 제안한다.

A new concept of ocean transport system, called mobile harbor, was introduced as a feasibility study in Korea in 2009. Target of the mobile harbor is a short distance transport of containers with or without cargo handling cranes. Although the mobile harbor project has a lot of topics to deal with, this paper is to focus on only ship-to-ship stabilized mooring, which plays a key role in cargo handling. The ship-to-ship stabilized mooring system was developed and installed on board a barge of LOA 32m and breadth 12m. The dockside tests as sea test were carried out so as to ascertain whether the systems can work well to control the barge’s motion. The results of dockside test showed that the heave motion of the barge's motion can be reduced by more than 45%.

This paper presents a remote monitoring and simulation system for a building cleaning mobile robot. It provides a tool of convenient 3D graphical map construction including network camera image viewer and status information of the robot. The 3D map is reconstructed from existing 2D building CAD data with DXF format using OpenGL graphic API. Through this system, it is possible to monitor and control the cleaning mobile robot from remote place. A practical experiment is performed to show the reliability and convenience of the monitoring system. The proposed system is expected to give efficient the way of control and monitoring to building cleaning mobile robot.

Recently, robotic automation in clinical laboratory becomes of keen interest as a fusion of bio and robotic technology. In this paper, we present a new robotic platform for clinical tests suitable for small or medium sized laboratories using mobile robots. The mobile robot called Mobile Agent is designed as transfer system of blood samples, reagents, microplates, and any instruments. Also, the developed mobile agent can perform diverse tests simultaneously based on its cooperative and distributed ability. The driving circuits for the mobile agent are embedded in the robot, and each mobile agent communicates with other agents by using Bluetooth communication. The RFID system is used to recognize patient information. Also, the magnetic hall sensor is embedded to remove and compensate the cumulated error of locomotion at the bottom of mobile agent. The proposed mobile agent can be easily used for various applications because it is designed to be compatible with general software development tools. The Mobile agents are manufactured, and feasibility of the robot and localization of the agents using magnetic hall sensor are validated by preliminary experiments.

The paper proposes a human-following behavior of mobile robot and an intelligent space (ISpace) is used in order to achieve these goals. An ISpace is a 3-D environment in which many sensors and intelligent devices are distributed. Mobile robots exist in this space as physical agents providing humans with services. A mobile robot is controlled to follow a walking human using distributed intelligent sensors as stably and precisely as possible. The moving objects is assumed to be a point-object and projected onto an image plane to form a geometrical constraint equation that provides position data of the object based on the kinematics of the intelligent space. Uncertainties in the position estimation caused by the point-object assumption are compensated using the Kalman filter. To generate the shortest time trajectory to follow the walking human, the linear and angular velocities are estimated and utilized. The computer simulation and experimental results of estimating and following of the walking human with the mobile robot are presented.

Recently, with the development of service robots and with the new concept of ubiquitous world, the position estimation of mobile objects has been raised to an important problem. As pre-liminary research results, some of the localization schemes are introduced, which provide the absolute location of the moving objects subjected to large errors. To implement a precise and convenient localization system, a new absolute position estimation method for a mobile robot in indoor environment is proposed in this paper. Design and implementation of the localization system comes from the usage of active beacon systems (based upon RFID technology). The active beacon system is composed of an RFID receiver and an ultra-sonic transmitter: 1. The RFID receiver gets the synchronization signal from the mobile robot and 2. The ultra-sonic transmitter sends out the traveling signal to be used for measuring the distance. Position of a mobile robot in a three dimensional space can be calculated basically from the distance information from three beacons and the absolute position information of the beacons themselves. Since it is not easy to install the beacons at a specific position precisely, there exists a large localization error and the installation time takes long. To overcome these problems, and provide a precise and convenient localization system, a new auto calibration algorithm is developed in this paper. Also the extended Kalman filter has been adopted for improving the localization accuracy during the mobile robot navigation. The localization accuracy improvement through the proposed auto calibration algorithm and the extended Kalman filter has been demonstrated by the real experiments.