Earticle

This paper presents modifications and improvements to the interface of a secure real media contents management model with the intention of increasing security and usability. This paper examines a security technology that needs to be considered in the EHR (Electronic Health Record) service model. This EHR(Electronic Health Record) service model is suitable for example a secure real media contents management & processing. It constructs a model based on a MVC (Model-View-Controller) pattern based on access rights and distributed management. In particular, it constructs a test bed utilizing the Open EHR Tool which is a major topic in this area. Through this, it suggests the EHR service security control model in the context of the patient and medical team. Our work aims for a new way of structuring, storing and managing patient data so that they can be shared and exchanged between different healthcare providers and other stakeholders in a safe and secure manner.

Mobile application for campus is an integral part of the construction of wisdom campus. CampusService - a campus information service system is designed, and is comprised of three parts, Android client, Web client and server, which are all designed according to MVC pattern. C/S architecture is adopted between the Android client and the server, B/S architecture is adopted between the Web client and the server, and JSON is used as a unified data interface for accomplishing the interactions. The architectures of three parts are described, and key technologies are represented, including database access optimization, Android display, transaction management and authentication, among which database access optimization technology has two respects: using C3P0 to maintain connection pool and prefetching data based on their popularity. According to testing, the system implements functions of user management, intramural announcements, interaction with friends, activity participation, and campus maps, and it has good performance. The system provides an efficient platform for real-time communication among teachers, students and school authority.

Traditional MVC model is a monopoly-like patterns in response to the request, although there are a lot of advantages, but the performance of the layer is weak, and AJAX just make up for shortcomings in this regard.Ajax is the popular Web client technology, providing a asynchronous programming model by the adoption of Java Script and DHTML, so as to enhance the interactive web pages and the ability to respond so that the Web application offer the human-computer users a better experience. In this paper, it illustrates the development of Web applications by combination of both, and puts forward the reconstruction of the MVC pattern.

본 논문에서는 이동 로봇의 동적환경에서 장애물과의 충돌없이 목표점에 도달하기 위한 새로운 방법을 제시하였다. 논문의 기본 아이디어는 목표점을 향해 이동한 거리와 장애물 들과의 충돌시간과의 관계를 특정평면에 표시하는 기존의 충돌회피지도(collision free map) 개념을 사용하였다. 그러나 기존의 충돌지도를 사용한 기법은 이동할 경로가 정해졌다는 전제하에 선속도와 각속도가 decoupling되어 nonholonomic 시스템에서 사용하기 어려운 단점을 가진다. 본 연구에서는 이러한 기존 충돌지도의 문제점을 해결하기 위해 장애물의 동적운동에 의한 충돌위치 및 예상충돌시간의 변화를 고려하여 동적충돌지도를 생성하는 방법을 제시하였다. 이 방법은 선속도 뿐만이 아니라 각속도의 가용성(feasibility)을 고려하기 위해 기존의 충돌지도에서 사용한 이동길이-서보시간 평면을 제시된 새로운 평면으로 투영하여 궤적계획을 하는 것으로 모든 해들이 닫힌 형태를 취하도옥 실시간 경로 및 궤적 계획기를 설계하였다.

In this paper we addressed a novel method of collision free motion planning of mobile robots under dynamic environments. The main idea of our paper follows the existing concept of collision free map which represents the relation, between collision time and the moving distance of the robot to the goal, on the characteristic plane. However, this existing method has the disadvantage because it assumes the fixed path which makes linear velocity and angular one decoupled, so it is difficult to use in nonholonomic system. To solve the problem of the existing collision map, we present DCM(dynamic collision map) concept which consider the estimated collision time as well as the collision position. The proposed method projects the plane of the travel length versus servo time, which is conventional in the existing method, into the new plane. Conclusively, our method takes the closed form of all solutions, which makes the real time path and the trajectory planner possible.

무선 단말기와 같은 제한된 환경에서의 애플리케이션 개발은 대부분 사용자 인터페이스 부분이 차지하고 있다. 사용자 인터페이스의 효과적인 관리를 위한 기법이 연구되어 왔으며 기존의 MVC 모델이 사용되고 있다. MVC 모델은 애플리케이션 개발 시 사용자 인터페이스의 효과적인 관리를 위한 방법을 제공한다. 그러나 제한된 무선 단말기 상에서의 MVC 모델의 적용은 사용자 인터페이스 뷰의 독립성을 위한 과도한 객체 생성으로 작업 프로세스와 메모리 공간의 효율성을 떨어뜨리는 문제점을 가지고 있다. 본 논문은 기존 MVC 모델에 Object Pool 패턴을 활용하여 UI 컴포넌트의 재사용이 가능한 개선된 UP-MVC모델을 제안한다. UP-MVC 모델은 무선 단말에서 메모리 리소스 사용의 문제점을 개선하여 모바일 애플리케이션 성능을 높일 수 있다.