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Potts Model with Competing Interaction Up to the Third nearest-Neighbour Generation on a Cayley Tree
Research Output | Dar Al-hikmah Library | IIUM Only

It is in our interest to investigate the effect of the third nearest-neighbour binary interaction to the phase diagrams of the Potts model on a Cayley tree. Therefore, we generate and analyse the phase diagrams of the Potts model, considering prolonged competing binary interaction J2 and J3 on the same branch of the Cayley tree up to the third near

Experimental Investigation of Gas–oil–water Phase Flow in Vertical Pipes: Influence of Gas Injection on the Total Pressure Gradient
Research Output | Dar Al-hikmah Library | IIUM Only

Experimental work has been conducted to study the infuence of gas injection on the phase inversion between oil and water fowing in a vertical pipe. A vertical transparent pipe test section line of 40 mm ID and 50 cm length was used. The test fuids used were synthetic oil and fltered tap water. Measurements were taken for mixture velocity, superfcia

Experimental Investigation of High‑viscosity Oil–water Flow in Vertical Pipes: Flow Patterns and Pressure Gradient
Research Output | Dar Al-hikmah Library | IIUM Only

Flow experiments have been conducted for two-phase flow in a vertical pipe. The experiments were made for highly viscous oil–water in a stainless pipe at 250 psig pressure through the laboratory-scale flow test equipment. The test section used is a vertical transparent tube of 50 cm length and 40 mm ID. The test fluid utilized in this experiments

Paramagnetic Phases of four-State Potts Model on a Cayley Tree in the Presence of Competing Interactions
Research Output | Dar Al-hikmah Library | IIUM Only

We consider a Potts model on a Cayley tree with competing nearest neighbor J1 and next-nearest-neighbor interactions Jp restricted to spins belonging to the same branch of the tree with four spins and investigate the problem of phase transition for paramagnetic phases of this modeFull Terms & Conditions of access and use can be found at https:/

Gas–liquid two-Phase Upward Flow Through a Vertical Pipe
Research Output | Dar Al-hikmah Library | IIUM Only

The accurate estimation of pressure drop during multiphase fluid flow in vertical pipes has been widely recognized as a critical problem in oil wells completion design. The flow of fluids through the vertical tubing strings causes great losses of energy through friction, where the value of this loss depends on fluid flow viscosity and the size of t

The Effect of Eurycoma Longifolia Jack (Tongkat Ali) Extract on Salivary Streptococcus Mutans, Lactobacillus and Candida Albicans Isolated from High Risk Caries Adult Patients
Research Output | Dar Al-hikmah Library | IIUM Only

Introduction: The roots of E. longifolia or Tongkat Ali have been used to in traditional medicine as well as supplements and food additives. Many chemical compounds have been detected in extracts of its roots which is believed to be responsible for its medicinal properties. In this study, our objectives were to study the effect of the E. Longifolia

Retinal Image Quality Assessment: Portable Eye Examination Kit Retina (Peek Retina)™ Versus 3d-Printed Ophthalmoscope (3dpo)
Research Output | Dar Al-hikmah Library | IIUM Only

Portable Eye Examination Kit retina (Peek Retina™, Peek Vision Ltd, UK) and 3D Printed Ophthalmoscope (3DPO) were identified to have acceptable image for retinal evaluation, however the retinal images quality in term of blood vessels visibility between both devices was uncertain. This study was conducted to compare the quality of image based on b

Reliability of Manual Vascular Segmentation for Retinal Fractal Dimension Using Peek Retinatm
Research Output | Dar Al-hikmah Library | IIUM Only

Fractal dimension (Df) has been identified as indirect measure in quantifying the complexity of retinal vessel network which is useful for early detection of vascular changes. Reliability studies of Df measurement on retinal vasculature, has been conducted on retinal images processed by using semi-automated software which only permits image with 45

Slippage Detection for Grasping Force Control of Robotic Hand Using Force Sensing Resistors
Research Output | Dar Al-hikmah Library | IIUM Only

This paper presents the formulation of a nonlinear adaptive backstepping force control in grasping weight-varying objects using robotic hand driven by Pneumatic Artificial Muscle (PAM). The modelling and control problems arise from the high nonlinear PAM dynamics and the inherent hysteresis leading to a lack of robustness in the hand’s performanc

Testing the Imperforate Anus Psychosocial Questionnaire (Iapsq) on a Sample of Egyptian Children
Research Output | Dar Al-hikmah Library | IIUM Only

Imperforate anus is a malformation of the anus, children with such type of congenital malformation usually undergo reconstructive surgery and be looked after by pediatric surgery nurses due to the problems with constipation and fecal incontinence after the colostomy is closed. Lack of control over bowels may affect a child’s psychosocial adjustme

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