Design analysis of potential grid connected floating photovoltaic system in UTHM

Every month Universiti Tun Hussein Onn (UTHM) management pays around RM 1 million for electricity bills. The aim of this project is to explore the feasibility of implementing a grid connected Floating Photovoltaic (FPV) system at the campus of UTHM. There are multiple unutilized water bodies (ponds/lakes) within the campus premises covering a total area of more than 50,000 m2. A 4000 m2 located at the lake near faculty of technical and vocational education (FPTV) is considered of the total available area for the feasibility study. A total of 1372.6 kW can be generated by deploying 335W mono crystalline PV modules with 21% efficiency on a floating mechanism (floaters) on the selected area. The FPV system is then simulated using MATLAB Simulink to observe the performance parameters of the FPV system such as total harmonic distortion (THD), current and voltage waveforms. Hybrid Optimization Model for Electric Renewable (HOMER) software has been used to obtain results such as the net present cost (NPC), cost of operation (COE), CO2 emissions impact and the payback period of the grid connected FPV system. The FPV system provides the lowest cost of energy (LCOE) RM0.418 kWh and a total net present cost (NPC) of RM 52.3 million. This system can decrease CO2 emissions by about 1241 t/yr

A Low-Complexity Precoding Scheme for the Downlink of Multi-Cell Multi-User MIMO AF System

Because of its simplicity, amplify-and-forward (AF) is one of the most popular cooperative relaying technique. Relays are used in cooperative communication to improve reliability, coverage or spectral efficiency of cell-edge users. However, relays tend to increase the interferences seen by users of adjacent cells, particularly by the cell-edge users, when used in multi-cell systems. In this paper, we propose a low-complexity precoding scheme to mitigate the effect of other-cell interference (OCI) in cooperative communication. The scheme is designed by taking into account the interference plus noise covariance matrix of each user for mitigating the interference at each receiver by means of precoding at the relay node. Simulation results show the effectiveness of the proposed scheme, both in terms of sum-rate and computational complexity, when compared to other existing OCI-aware precoding algorithms for AF

Ultrafine conducting fibers: metallization of poly(acrylonitrile-co-glycidyl methacrylate) nanofibers

Electrospun poly(glycidylmethacrylate) (PGMA) and poly(acrylonitrile-co-glycidyl methacrylate) (P(AN-GMA)) nanofibers were coated with monodisperse silver nanoparticles by using an electroless plating technique at ambient conditions. Oxirane groups on the surface of nanofibers were replaced with reducing agent, hydrazine. Surface modified nanofibers were allowed to react with ammonia solution of AgNO3. A redox reaction takes place and metallic silver nucleate on fibers surface. Parameters affecting the particle size were determined

A survey and tutorial of electromagnetic radiation and reduction in mobile communication systems

This paper provides a survey and tutorial of electromagnetic (EM) radiation exposure and reduction in mobile communication systems. EM radiation exposure has received a fair share of interest in the literature; however, this work is one of the first to compile the most interesting results and ideas related to EM exposure in mobile communication systems and present possible ways of reducing it. We provide a comprehensive survey of existing literature and also offer a tutorial on the dosimetry, metrics, international projects as well as guidelines and limits on the exposure from EM radiation in mobile communication systems. Based on this survey and given that EM radiation exposure is closely linked with specific absorption rate (SAR) and transmit power usage, we propose possible techniques for reducing EM radiation exposure in mobile communication systems by exploring known concepts related to SAR and transmit power reduction in mobile systems. Thus, this paper serves as an introductory guide to EM radiation exposure in mobile communication systems and provides insights toward the design of future low-EM exposure mobile communication networks

A new approach on helices in Euclidean n-space

In this work, we give some new characterizations for inclined curves and slant helices in n-dimensional Euclidean space E^{n}. Morever, we consider the pre-characterizations about inclined curves and slant helices and reconfigure them