For visualization of multivariable data, multivariate cube meets with the limitation of screen and human vision. Retinal variables are integrated into multivariate cube to enhance its visual characteristics. The selective feature of variables and associative feature of the values of the same variable are improved with the integration of retinal variable into the set of visual variables. The sel...

This paper describes a system for supporting the construction of software requirement models, which are initial computable models representing users’ requirements in software design. The system principally consists of two components, a system for aiding the formation of requirement concepts by visualizing a user’s thought space, and a knowledge-based system which automatically assembles the asc...

The GM-MDS conjecture of Dau et al. (ISIT 2014) speculates that the MDS condition, which guarantees the existence of MDS matrices with a prescribed set of zeros over large fields, is in fact sufficient for existence of such matrices over small fields. We prove this conjecture.

In this paper, an objective function based on the profit of actual use for spectrum allocation is modeled, and a requirement-based short-time handoff algorithm between CR users in order to make full use of the CR users’ surplus spectrum resource is proposed. Simulation results show that the algorithm makes effective use of surplus assignment, improves the profit of actual use, and has the super...

Participatory Design (PD) methodology has been used to develop user acceptable systems by accommodating various needs of users at the early stage of system development. However, PD is considered difficult to use because of the lack of tools and techniques. This research developed a theoretical framework for automatic generation of requirement scenarios, each of which describes a possible user r...

in this paper, downlink resource allocation for a sparse code multiple access (scma) based heterogeneous  cellular networks (hcn) is investigated. the main aim of this paper is to obtain joint power allocation and codebook assignment to achieve the least total system transmit power. in this regard, the proposed objective function is formulated as total transmit power subject to users minimum ra...