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Determining Watermark Embedding Strength Using Complex Valued Neural Network
Research Output | Dar Al-hikmah Library | IIUM Only

The requirement needed for an effective and proficient watermarking system is application dependent. However, robustness and image quality (imperceptibility) are fundamental requirements for applications that deal with image watermarking. The major factor that affects the robustness and imperceptibility is the watermark embedding strength. In this

Relative Motion Guidance, Navigation and Control for Autonomous Spacecraft Rendezvous
Research Output | Dar Al-hikmah Library | IIUM Only

In this paper, the development of guidance, navigation, and control algorithms of an autonomous space rendezvous and docking system are presented. These algorithms are based on using the analytical closed-form solution of the Tschauner-Hempel equations that is completely explicit in time. The navigation system uses an extended Kalman filter based o

Guidance, Navigation and Control for Satellite Proximity Operations Using tschauner-Hempel Equations
Research Output | Dar Al-hikmah Library | IIUM Only

In this paper, the development of relative navigation, guidance, and control algorithms of an autonomous space rendezvous and docking system are presented. These algorithms are based on using the analytical closed-form solution of the Tschauner-Hempel equations that is completely explicit in time. The navigation system uses an extended Kalman filte

Relative Motion Modeling and Control in a Perturbed Orbit
Research Output | Dar Al-hikmah Library | IIUM Only

In this paper, the dynamics of the relative motion problem in a perturbed orbital environment are exploited based on Gauss’ and Cowell’s variational equations. The inertial coordinate frame and relative coordinate frame (Hill frame) are studied to describe the relative motion. A linear high fidelity model is developed to describe the relative m

Transobsturator Tape (Tot) Procedure: the Ipoh Experience
Research Output | Dar Al-hikmah Library | IIUM Only

The use of transobturator tape (TOT) for the treatment of stress urinary incontinence (SUI) has gained popularity since it was introduced in 2001. Only few studies have reported that TOT is superior in safety and efficacy when compared to tension free vaginal tape (TVT). This case-series study was conducted to investigate the safety and efficacy of

Prevalence of Lower Urinary Tract Symptoms (Luts)among Young Age Medical Population
Research Output | Dar Al-hikmah Library | IIUM Only

Introduction: Frequency of lower urinary tract symptoms (LUTS) in young age women is not well studied. It is said to be common among female elderly and multiparous opulation. The aim of this study is to obtain the prevalence of LUTS among nulliparous students in relation to their personal hygiene. Materials and methods: This is a prospective cross-

Feasibility Analysis of Free Space Earth to Satellite Optical Link in Tropical Region
Research Output | Dar Al-hikmah Library | IIUM Only

Free Space Optics (FSO) becomes a great attention because of the chances in transmitting data up to 2.5Gbps. There are a lot of advantages offered by FSO such as easily deployment with saving time and cost and no electromagnetic interference. In spite of the advantages, FSO has an uncontrolled drawback which is highly sensitive to atmospheric pheno

Handwritten Arabic Word/character Recognition : Common Approaches
Research Output | Dar Al-hikmah Library | IIUM Only

Offline handwriting word recognition is the automatic transcription by computer, where only the image of the handwriting is available. The recognition operation includes many steps, the segmentation step and the recognition step of offline handwritten Arabic words are suggested to be implemented using different techniques, since off-line Arabic cha

An Evaluation of Transform Domain Watermarking and its Application to Intellectual Properties Images
Research Output | Dar Al-hikmah Library | IIUM Only

Transform domain as emerged as a powerful tool for transforming digital signals from one domain to another. Over 80% of all Digital Signal Processing (DSP) applications require some form of domain transformation representation or processing (Edwards, 2006,; Proakis & Manolakis, 2004). Transform is simply mapping from one set of coordinates to a

distortion-Free Embedding in the Optic Disk of Retina Fundus Images Using complex-Valued Neural Network
Research Output | Dar Al-hikmah Library | IIUM Only

One of the downside of the current watermarking system is the inevitable distortion caused by data embedding. Some algorithms have been modified to produce a minimal distortion in the host image. however such small alterations may not be acceptable for medical images which are use for diagnosing and treatment of diseases. This paper presents a dist

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