Malicious software or popularly known as malware is a threat to the computer users, regardless which platform that they are using; desktops, laptops or mobile phones. Malware is a type of software which purposely written for malicious purpose. It manipulates software vulnerability to get illegal access to the host machine. Malware evolves from a pr

A novel, simple, and short cavity design of single longitudinal mode (SLM) tunable erbium-doped fiber ring laser using a graphene-based saturable absorber is proposed and demonstrated as a tunable signal source. The SLM output is then mixed with another output signal from a tunable laser source (TLS) to generate tunable radio frequency (RF) signals

We propose and demonstrate the generation of a supercontinuum (SC) spectrum from a 10 m long silica fiber co-doped with zirconia-yttria-alumino and erbium (Zr-EDF) as a non-linear medium. The proposed system utilizes a 2 m long Zr-EDF in a ring laser configuration to generate mode-locked pulses at 1560 nm based on the non-polarization rotation (NPR

A passively Q-switch Brillouin-Erbium Doped Fiber Laser (BEDFL) with 11 stable lasing wavelengths at peak power of -15 dBm between 1550.1 nm to 1551.0 nm, 1.67 µs pulse width and repetition rate of 152.40 kHz is demonstrated. The proposed BEDLF uses a 7.7 km Dispersion Compensating Fiber (DCF), assisted by an Erbium Doped Fiber Amplifier (EDFA) to

A hybrid DepressedCladding Erbium Doped Fiber (DCEDF) together with a broadband Semi conductor Optical Amplifier (SOA) to enhance the generation of Stokes and antiStokes in a 7.7 km long Dis persion Compensating Fiber (DCF) is proposed and demonstrated. The performance of the proposed system is compared against that of a conventional system with on

We propose and demonstrate a tunable S-band multiwavelength Brillouin/Raman fiber laser (MBRFL) with a tuning range of between 1490 to 1530 nm. The proposed MBRFL is designed around a 7.7 km long dispersion compensating fiber in a simple ring configuration, acting as a nonlinear medium for the generation of multiple wavelengths from stimulated Bril

This paper highlights the results of light levels and light-fastness study conducted in four daylit historical museum galleries in Malaysia. These museums architectural features allow sun radiation into the building, causing light exposure damage to artifacts. This study aims to evaluate the luminous exposures and light-fastness as an initial preve

In this paper, the steady mixed convection boundary layer in laminar film flow of a micropolar fluid is considered. The resulting nonlinear coupled ordinary differential equations are solved numerically using an efficient implicit finite-difference scheme. The numerical results obtained for the skin friction coefficient and the local Nusselt number

In this paper, the unsteady three-dimensional boundary layer flow due to a stretching surface in a viscous and incompressible micropolar fluid is considered. The partial differential equations governing the unsteady laminar boundary layer flow are solved numerically using an implicit finite-difference scheme. The numerical solutions are obtained wh

This research embarks on investigations for modelling and control of a two-wheeled wheelchair system as means of mobility for the disabled and the elderly people. The two-wheeled wheelchair is considered as a double-link inverted pendulum, and mathematical model of the system is obtained.