International Journal of Advanced Media and Communication (5 papers in press)
Is smartphone creating a better life? Exploring the relationships of the smartphone practices, social capital and psychological well-being among college students
by Hua Pang
Abstract: Along with the development of wireless communication and the rapid diffusion of handset, mobile technologies have provided individuals with unprecedented new spaces for social interactions and multiple modes of expression, and as such, they are expected to enhance individual's social capital as well as psychological well-being. This empirical study investigates the relationship between the utilisation of smartphones and social capital's formation and maintenance with an emphasis on youth uses and practices. In addition, it also explores maintained social capital by evaluating how mobile communication influences one's individual capability to keep in touch with members of a formerly inhabited community. The results from a survey of college students (N = 346) demonstrate a strong linkage between smartphone use and three different modes of social capital. The strongest relationship, revealed by Pearson correlation coefficient analysis, is between smartphone use and bridging social capital. Limitations and suggestions for future research are discussed.
Keywords: mobile communication; smartphone; social capital; psychological well-being.
A new fault-tolerant architecture based on DASH for adaptive streaming video
by Haifa Harrouch, Mourad Kaddes, Majed Abdouli, Claude Duvallet, Rafik Bouaziz
Abstract: The standard dynamic adaptive streaming over HTTP (DASH)has been proposed to guarantee a quality of video under varying bandwidth. DASH enables adaptation of the media bit-rate to varying throughput conditions by offering multiple representations of the same content. However, the Moving Picture Experts Group (MPEG) DASH specification only defines the media presentation description (MPD) and the segment formats. In order to take advantages of DASH, we propose a fairness architecture, called dynamic adaptive streaming over HTTP distributed multimedia systems (DASH-DMS). DASH-DMS combines both 2-tiers and 3-tiers architectures in order to guarantee a quality of service (QoS) under changing conditions. Moreover, we propose replication algorithms to enable load balancing video servers and improve the global QoS. Furthermore, in order to improve the availability of our system, we use a fault tolerance policy. To this purpose, we have conduct simulations throughout the paper using the simulator developed by our team.
Keywords: streaming video; load balancing; DASH-DMS; replication; QoS; fault tolerance.
Special Issue on: Advanced Technologies and Theories in Future Convergence Telecommunications
The study on the cell survival for bioartificial liver by using standardisation extracorporeal circulation method
by Seonghwan Kim, Minwoo Cheon
Abstract: This research is on the standardisation of perfusion to help increase the survival rate of hepatic insufficiency patients through the enhanced cell survival of artificial livers. Generally, artificial livers are used in the form of extracorporeal circulation with a mounted bioreactor. As artificial livers need to replace liver functions, to enhance the liver cell survival ratio in the bioreactor, the bioreactor performance needs to be improved. To this end, perfusion standardisation is required in the extracorporeal circulation and each circulation pumps should be interoperable. In this study looked at possible standardisation of perfusion methods capable of increasing liver cell survival rate in order to find out the optimal standardised bioreactor. As a result, perfusion 2 control was found to be essential in raising the cell survival ratio and perfusion 3 implementation enhanced the survival ratio.
Keywords: extracorporeal circulation; standardisation; plasma perfusion; artificial organ; cell survival; artificial; bioreactor.
Special Issue on: ICONI 2014 Internet Computing and its Applications
A survey on success factors and obstacles for further adoption of agile in IT organisations
by Mannir Bello, Imran Ghani
Abstract: These days IT organisations aspire to implement effective and efficient processes and practices for their software development. One such attempt is by trying to implement agile software development methodologies. Indeed, agile methodologies offer some useful advantages to organisations. These benefits include high team collaboration and customer satisfactions. Numerous agile software development methods such as Scrum, extreme programming (XP), Feature driven development, Kanban, dynamic system development method (DSDM) among many are often being used by various IT organisations. Several studies have shown the success and failure of adoption of agile methods or practices. Our research presents a number of additional critical success factors and obstacles by asking from agile practitioners. Moreover, this paper presents a review of some of the existing studies also. The purpose of this survey is use to present a brief guide related to success factors and obstacles of agile adoption in some companies.
Keywords: agile; extreme programming; FDD; feature driven development; scrum; Kanban; DSDM; dynamic system development method; agile adoption.
A new embedded image compression scheme using rate-distortion optimised block coding of wavelet coefficients
by Chang Mo Yang, Kwangsue Chung
Abstract: In this paper, we propose a new embedded image compression scheme which uses rate-distortion optimised block coding (RDBC) of wavelet coefficients. Unlike conventional embedded compression schemes which use the set partition or block partition coding methods according to the magnitude of wavelet coefficients, the proposed scheme achieves rate-distortion optimisation by ordering wavelet coefficients or blocks according to their expected rate-distortion slopes. In addition, the proposed scheme uses a modified block partition method and new context models for the entropy coding. Experimental results demonstrate that the proposed scheme not only produces embedded bit-streams but also outperforms existing embedded compression schemes.
Keywords: block partition coding; embedded image compression; rate-distortion optimisation; RDBC; rate-distortion optimised block coding; wavelet.