• 근관절건강학회지
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• 제26권3호
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• pp.223-231
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• 2019

Purpose: This study aimed to design user interfaces of a mobile application for managing pressure injury patients in a long-term care hospital based on the user's needs. Methods: To reflect users' needs in the mobile application, the user interfaces in this study were designed in five steps: brainstorming and mind mapping, persona and scenario, needs list and priority, a draft version of flow chart and user interfaces and expert review. These steps were conducted with a step nurse at a long-term care hospital, a professor who majored in nursing informatics, a professor who had lots of research experiences about pressure injury and a wound ostomy continence nurse. Results: Two personas, scenarios and needs' lists were derived. Listed Needs included the followings; Accurate staging of pressure injury; Appropriate management by staging; Acquisition of professional knowledge about pressure injury; Acquisition of easy pressure injury information through text, picture and video; and Sharing pressure injury information in unit. The structure, menus and features of the pressure injury mobile application were visualized with user flow based on two personas' scenarios and needs' lists. Conclusion: Our study suggests and visualizes the key features of the 'Pressure Injury Guide', a pressure injury management mobile application for nurses in a long-term care hospital, which can be utilized by nurses, application developers, and related researchers.

• 대한전자공학회논문지TC
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• 제43권9호
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• pp.14-24
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• 2006

초기 지상파DMB(T-DMB)는 단방향 방송 서비스만을 제공하였으나, 최근에는 이동통신의 리턴채널을 이용한 양방향 데이터 서비스까지 제공한다 T-DMB는 텔레매틱스, RFID 등과 같은 이질적인 응용서비스와 통합된 서비스를 제공하는 형태로 진화될 것으로 예측된다. 이러한 관점에서 T-DMB 플랫폼에서 다양한 텔레매틱스 및 RFID 응용들을 지원할 수 있는 프레임 워크가 정의되어야 한다. 본 논문에서는 T-DMB가 양방향 인터렉티브 통신을 제공하는 환경에서, 교통정보 서비스, 콘텐츠 서비스와 같은 REID 응용서비스를 제공할 수 있는 통합 서비스 모델을 제안하였다. 실현을 위해 서비스 시나리오, 네트워크 참조 모델, 각 엔티티의 기능, 데이터 전송 방법, 메시지, 코딩 규칙을 설계하였다. 제안한 모델은 RFID 리더 기능이 없는 T-DMB 단말상에서, FRID 응용서비스를 동일하게 제공받을 수 있다. 또한, TPEG-Location 응용을 이용하므로 사용자의 위치를 기준으로 교통 및 여행자 정보(TTI) 서비스뿐만 아니라 주변에서 제공하는 모든 RFID 응용서비스를 이용할 수 있다. 메시지 구조는 TPEG 표준을 따라 설계하였다.

• 디지털융복합연구
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• 제15권7호
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• pp.367-373
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• 2017

본 연구는 지속해서 증가하는 유방암 환자의 수술 후 신체 및 정신적 고통 완화를 도와주는 모바일 애플리케이션 서비스 제안에 목적이 있다. 먼저 연구 목적 달성을 위해 문헌연구를 통한 유방암의 전반적인 이해와 이와 유사한 서비스를 분석하였다. 이후 서비스 디자인 방법론인 더블 다이아몬드 디자인 프로세스 모델을 단계별로 적용하여 사후관리 중심의 1:1 맞춤형 전문가 코칭(coaching) 서비스를 제공하는 모바일 애플리케이션을 고안하였다. 세부적으로는 첫째, 현재 진행되는 프로그램 분석과 이해관계자들(유방암 환자, 보호자, 간호사 및 병원 내 암센터 용품 판매원)과의 인터뷰를 통해 사용자 니즈(needs)를 도출하였다. 둘째, 이를 기반으로 사용자를 대표하는 페르소나와 고객여정맵을 토대로 한 전체적인 시나리오를 시각화, 콘셉트 설정 및 키워드 도출로 본 연구를 구체화하였다. 셋째, 구체적인 기능 설명과 함께 효과적으로 전달하기 위한 프로토타입을 제작하여 최종 목표인 모바일 애플리케이션 서비스를 제안하였다. 본 서비스를 통하여 그들의 삶의 질을 향상시키는 서비스가 되길 기대한다.

• 한국재난정보학회 논문집
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• 제17권1호
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• pp.165-175
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• 2021

연구목적: 본 연구는 수도권 폐기물 차량을 대상으로 네트워크 차원에서의 자율주행기술 적용에 따른 이산화탄소(CO₂) 배출량 변화를 정량적으로 제시하는데 목적이 있다. 연구방법: 2030년을 목표연도로 분석 방법은 미시행시 사용자균형배정을 통해 도로 링크별 이산화탄소(CO₂) 배출량을 추정하였다. 시행시는 폐기물 차량의 자율주행기술 적용에 따라 군집주행한다는 전제하는 노선배정을 수행하였으며, 그 외 수단은 노선배정 결과를 반영한 사용자균형배정으로 이산화탄소(CO₂) 배출량을 추정하였다. 연구결과: 분석 결과, 이산화탄소(CO₂) 배출량은 전국단위의 네트워크에서 약 56.9톤/일이 감축되는 것으로 나타났으며, 수도권은 약 54.7톤/일이 감축되는 것으로 분석되었다. 결론: 본 연구는 자율주행기술이 가져올 다양한 사회적 효과 중 환경적 측면에서의 영향을 정량적으로 제시하였으며, 향후 다양한 분석 방법론 개발과 관련 연구가 지속적으로 수행되어야 할 것이다.

• Ocean Systems Engineering
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• 제9권4호
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• pp.391-407
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• 2019

Tracking the location (position) of a surface or underwater marine vehicle is important as part of guidance and navigation. While the Global Positioning System (GPS) works well in an open sea environment but its use is limited whenever testing scaled-down models of such vehicles in the laboratory environment. This paper presents the design, development and implementation of a low energy ultrasonic augmented single beacon-based localization technique suitable for such requirements. The strategy consists of applying Extended Kalman Filter (EKF) to achieve location tracking from basic dynamic distance measurements of the moving model from a fixed beacon, while on-board motion sensor measures heading angle and velocity. Iterative application of the Extended Kalman Filter yields x and y co-ordinate positions of the moving model. Tests performed on a free-running ship model in a wave basin facility of dimension 30 m by 30 m by 3 m water depth validate the proposed model. The test results show quick convergence with an error of few centimeters in the estimated position of the ship model. The proposed technique has application in the real field scenario by replacing the ultrasonic sensor with industrial grade long range acoustic modem. As compared with the existing systems such as LBL, SBL, USBL and others localization techniques, the proposed technique can save deployment cost and also cut the cost on number of acoustic modems involved.

• ETRI Journal
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• 제40권3호
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• pp.318-329
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• 2018

Femtocell (FC) technology envisaged as a cost-effective approach to attain better indoor coverage of mobile voice and data service. Deployment of FCs over macrocell forms a heterogeneous network. In urban areas, the key factor limits the successful deployment of FCs is inter-cell interference (ICI), which severely affects the performance of victim users. Autonomous FC transmission power setting is one straightforward way for coordinating ICI in the downlink. Application of intelligent control using soft computing techniques has not yet explored well for wireless networks. In this work, autonomous FC transmission power setting strategy using Adaptive Neuro Fuzzy Inference System is proposed. The main advantage of the proposed method is zero signaling overhead, reduced computational complexity and bare minimum delay in performing power setting of FC base station because only the periodic channel measurement reports fed back by the user equipment are needed. System level simulation results validate the effectiveness of the proposed method by providing much better throughput, even under high interference activation scenario and cell edge users can be prevented from going outage.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2009년도 추계학술발표논문집
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• pp.190-193
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• 2009

무선 센서 네트워크에서 가장 중요하고 기본적인 요소는 환경 정보를 수집하고 이를 사용자 응용시스템에 전송하는 무선 센서 노드이다. 무선 센서 노드는 센서로 환경 정보를 수집하고 이를 저장, 가공하여 처리된 데이터를 사용자에게 전송하는 무선 송수신 장치로 기술의 발전에 따라 소형화, 지능화되고 있다. 특히 마이크로컨트롤러, RF 모듈, 메모리 등을 하나의 칩 내부에 모두 통합하는 SoC(System-on-Chip)기술은 센서 노드의 소형화와 제조 단가를 낮추는데 중요한 역할을 한다. 본고에서는 상용 SoC를 사용하여 무선 센서 네트워크를 위한 소형 무선 센서 노드를 설계하였으며 이를 이용한 여러 활용 방안 및 추가적인 고려사항에 대하여 논하였다.

• 로봇학회논문지
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• 제2권1호
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• pp.80-92
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• 2007

For the pervasive computing in ubiquitous environment, it is very important to manage the context model to provide pertinent context knowledge to context-aware applications. The context model should be able to support efficiently the context knowledge reusing and sharing as well as reasoning. Previous works focus mainly on the context knowledge representation scheme for reasoning. This paper proposes a context knowledge modeling scheme especially for reusing and sharing. This scheme provides well-established principles and guides for 1) context knowledge modularization and hierarchization, and for 2) context knowledge identification and organization. Once the context models are built according to the scheme, the structure of the context model and the meanings of the context knowledge elements become clear and consistent, so that context-aware applications can share and reuse the context knowledge in easy and error-reduced manner. This paper also discusses the implementation of a context model and an application for Presentation Helper scenario running on a software middleware system (CAMUS) for ubiquitous service robots which is being developed by ETRI Korea.

• Journal of Multimedia Information System
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• 제4권4호
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• pp.171-178
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• 2017

Data mashup is a web technology that combines information from multiple sources into a single web application. Mashup applications create a new horizon for new services, like environmental monitoring. Environmental monitoring is a serious tool for the state and private organizations, which are located in regions with environmental hazards and seek to gain insights to detect hazards and locate them clearly. These organizations utilize a data mashup to merge datasets from different Internet of multimedia things (IoMT) context-based services in order to leverage its data analytics performance and the accuracy of the predictions. However, mashup different datasets from multiple sources is a privacy hazard as it might reveal citizens specific behaviors in different regions. The ability to preserve privacy in mashuped datasets and at the same time provide accurate insights becomes a key success for the spread of mashup services. In this paper, we present our efforts to build a fog-based middleware for private data mashup (FMPM) to serve a centralized environmental monitoring service. The proposed middleware is equipped with concealment mechanisms to preserve the privacy of the merged datasets from multiple IoMT networks involved in the mashup application. Also, these mechanisms preserve the aggregates in the dataset to maximize the usability of information to attain accurate analytical results. We also provide a scenario for IoMT-enabled data mashup service and experimentation results.

• International Journal of Railway
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• 제9권2호
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• pp.36-40
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• 2016

TETRA communication system is very versatile system which can transmit voice + data and packet data optimized. Direct mode operation permits to connect between mobiles when mobile stain is out of coverage of networks. It can be more secure communication channel for railway signaling systems. Railway signaling systems use many of wayside signal equipment, which require many maintenance efforts and budget. Many railway authorities want to reduce and replace the wayside equipment. Radio based signaling systems are one of candidate for replacing the conventional signaling systems. The radio based signaling systems can replace track circuit and wayside signal. The radio systems permit to connect between control centers and trains. The radio systems have to ensure high quality of the connectivity more or equal to the existed track circuits. We studied the application of TETRA systems for railway radio systems for bridging between train control centers and trains. We provide an operation scenario for radio based train control system to ensure the safety require to the existed trains control system and satisfied the existed operational availability. We showed the data transmission speed, maximum bit error rate, and data coding for the radio-based signal system using TETRA systems.