Abstract Pervasive or Ubiquitous computing is a paradigm characterized by millions of self communicating intelligent devices, taking active role in every activity of human life. Ubiquitous computing presents some challenges across computer science: in system design engineering, in system modeling and in human computer interaction modeling. Traditional human computer interaction models like command line, menu driven, GUI based, will be inappropriate to... Pervasive or Ubiquitous computing is a paradigm characterized by millions of self communicating intelligent devices, taking active role in every activity of human life. Ubiquitous computing presents some challenges across computer science: in system design engineering, in system modeling and in human computer interaction modeling. Traditional human computer interaction models like command line, menu driven, GUI based, will be inappropriate to ubiquitous computing situation. The “natural interaction paradigm” appropriate for fully robust pervasive computing has yet to be emerged. This research document tries to model human computer interaction pattern in pervasive computing. Read More Read Less

Abstract Opportunistic network is a self-organizing network of resource-constraint mobile devices such as smartphones, tablets and laptop. It operates in a more challenging environment than infrastructured network or even ad-hoc networks, and thus requires different kind of routing rotocol which adopts the store-carry-forward radigm. Many routing protocols have been roposed for it, however... Opportunistic network is a self-organizing network of resource-constraint mobile devices such as smartphones, tablets and laptop. It operates in a more challenging environment than infrastructured network or even ad-hoc networks, and thus requires different kind of routing rotocol which adopts the store-carry-forward radigm. Many routing protocols have been roposed for it, however few of them has taken into consideration status of resources in making forwarding decision. Smartphone and other mobile devices nowadays are offering wider range of functionalities enabling users not only to make phone calls and sending short messages but also more resource consumed activities such as surfing the internet, sensing, collecting and ransmitting data. In this paper, we enhance a probabilistic routing protocol called PRoPHET to check the remaining energy and buffer space of nodes coming into contact before forwarding messages to them. A mobile device which has met more frequently to the destination node may not be selected to forward a message if its battery energy is insufficient or buffer space is full. The performance evaluations have shown that the resource awareness ability reduce the number of transmitted and dropped messages and increase delivery ratio. Read More Read Less

Abstract As science and technology developed, people in modern society have never stopped stepping forward. Showing rapid increase in social growth and Research and Development (R&D) funding, South Korea have proved that they are also in the middle of this trend. There are countless projects that investors need to know how and where their funds are used. Developers... As science and technology developed, people in modern society have never stopped stepping forward. Showing rapid increase in social growth and Research and Development (R&D) funding, South Korea have proved that they are also in the middle of this trend. There are countless projects that investors need to know how and where their funds are used. Developers from diverse fields have developed different types of management systems to helpmonitor and manage their projects. However, the systems are separated from the banking systems, which are in charge of transacting funds. As a result, there have been misuses related to the R&D funding. Realizing the seriousness of those problems, integrated project management systems appeared. The purpose of this paper is to analyze the real issues of managing R&D funding in the existing project management systems and introduce the architecture of the integrated systems. Read More Read Less

Abstract In this paper, we propose a triangulation method for a set of points in the plane. The method is based on the idea of constructing convex layers by Graham’s scan. It allows to develop an algorithm with the optimal complexity of O(NlogN) and an easy implementation. First, convex hulls are constructed for the set S of N points, forming k... In this paper, we propose a triangulation method for a set of points in the plane. The method is based on the idea of constructing convex layers by Graham’s scan. It allows to develop an algorithm with the optimal complexity of O(NlogN) and an easy implementation. First, convex hulls are constructed for the set S of N points, forming k layers. Then, each layer is triangulated in one scan of the adjacent convex hulls. Algorithm is easily parallelized: each layer can be triangulated independently. The main feature of the proposed algorithm is that it has a very simple implementation and the elements (triangles) of the resulting triangulation are presented in the form of simple and at the same time fast data structures: concatenable triangle queue or triangle tree. This makes the algorithm convenient for solving a wide range of applied problems of computational geometry and computer graphics, including simulation in science and engineering, rendering and morphing. Read More Read Less