Shuhaida Yahud, Assoc. Prof. Dr.This page provides access to scholarly publications by UniMAP Faculty members and researchers.http://dspace.unimap.edu.my:80/xmlui/handle/123456789/329672024-03-28T21:24:17Z2024-03-28T21:24:17ZAssessment of an Arterial Stiffness to Demonstrate AVF Performance: Modelling ApproachChien Mien, T’ngShuhaida, Yahudhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/690152020-12-16T03:54:03Z2019-01-01T00:00:00ZAssessment of an Arterial Stiffness to Demonstrate AVF Performance: Modelling Approach
Chien Mien, T’ng; Shuhaida, Yahud
Arteriovenous fistula (AVF) defined as shunting in the arterial system and the venous conduit is a preferred vascular access used in haemodialysis. The AVF provide a sufficient increase in blood flow rates for effective dialysis. However maintaining AVF
patency become the greatest challenge for dialysis patient. Complications arise from this includes stenosis, aneurism and thrombosis. In previous studies, several methods are used to evaluate the performance of AVF. This study will focus on the assessment of arterial stiffness to demonstrate the performance of a side-to-side AVF. The condition of arterial stiffness which
alter haemodynamic of AVF, in fact, will affect its performance and functionality. To gain insight and understanding for the haemodynamic condition, a healthy AVF (without arterial stiffening) has been modelled in the computational fluid dynamic (CFD) framework. The aim of this project is therefore to develop a modelling approach, suitable for the analyses of blood
flow field to predict the performance and patency of AVF. A 3D CFD method is proposed to analysis flow field or haemodynamic in terms of blood flow velocity, blood pressure and wall shear stress (WSS) along the AVF. A laminar flow was introduced for the simulation of healthy AVF. Correlations in these haemodynamic parameters to assess the vascular failure
supports hypothesis suggesting flow field as predicator for AVF performance. Haemodynamic effects lead to AVF failure were determined. Significant flow disturbances with abnormally high or low WSS obtained from the simulation is used as a primary indicator.
Link to publisher's homepage at https://iopscience.iop.org/
2019-01-01T00:00:00ZElectrical properties investigation of unsaturated polyester resin with carbon black as fillersR., RevatiShuhaida, Yahud, Dr.Mohd Shukry, Abdul Majid, Dr.http://dspace.unimap.edu.my:80/xmlui/handle/123456789/351092014-06-05T04:20:44Z2014-06-01T00:00:00ZElectrical properties investigation of unsaturated polyester resin with carbon black as fillers
R., Revati; Shuhaida, Yahud, Dr.; Mohd Shukry, Abdul Majid, Dr.
In this paper, conducting polymer composites were prepared by adding different percentage of carbon black (2, 4, 6 and 8)% to unsaturated polyester resin. Hence, this project focuses on two types of carbon black which is commercially available that is activated carbon black and carbon black produced internally from water hyacinth. Their effect on the electrical properties of the polyester compositewas analyzed. The A.C. electrical conductivity of the polyester composite was studied using Precision LCR meter. The A.C. electrical conductivity of polyester-carbon black composite has been investigated at a frequency ranging from 50 Hz to 1 MHz. The result showed that the electrical conductivity of the composite was changing with different concentration of carbon black. It has been observed that the electrical conductivity of the composite is frequency dependent and increases with increasing percentage of carbon black fillers in the polyester composite.
Link to publisher's homepage at http://www.ttp.net/
2014-06-01T00:00:00ZDevelopment of mechanical prosthetic hand system for BCI applicationNoor Azuan, Abu Osman, Professor Ir. Dr.Shuhaida, Yahud, Dr.Sing, Yau Gohhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/348752014-05-29T14:33:39Z2008-01-01T00:00:00ZDevelopment of mechanical prosthetic hand system for BCI application
Noor Azuan, Abu Osman, Professor Ir. Dr.; Shuhaida, Yahud, Dr.; Sing, Yau Goh
The study is to develop a prosthetic hand that can be controlled by Brain-Computer Interface (BCI). The proposed prosthetic hand consists of palm and 5 fingers. The hand was designed to perform the 4 predetermined essential tasks in BCI applications; cylindrical grasp, key pinch, pulp to pulp pinch and tripod pinch. The phalanges of the finger was modeled as three link open chain joined at the metacarpal joint (MCP), proximal joint (PIP) and distal joint (DIP). Each segment denote as phalanx was made from two parallel aluminum plates and connected to the other segment using a bolted spacer acting as hinge joint. Length of each segment was made such that it will form an equiangular motion path during trajectory. Each joint is actuated by its individual actuator. Two mechanisms were proposed in this study. The first mechanism is the tendon drive; used terelyne string to pull each segment to flexion. The second mechanism is a spring return; a stored resistive force in torsion spring will kick the segment to its initial position. The hand was equipped with potentiometers and pressure sensors for control purposes. The prototype was tested with BCI system, in order to meet its initial objective and additional tests were carried out to evaluate its performance. An experiment to test the performance of the prosthetic hand was carried out successfully. Strength of each tendon was measured using a proof ring method and motion images were captured using video camera and analyzed using Peak Motus Performance 2000 Motion Analysis software.
Link to publisher's homepage at http://www.europeanjournalofscientificresearch.com/
2008-01-01T00:00:00ZProsthetic hand for the brain-computer interface systemShuhaida, Yahud, Dr.Noor Azuan, Abu Osman, Professor Ir. Dr.http://dspace.unimap.edu.my:80/xmlui/handle/123456789/348582014-05-29T06:02:27Z2007-01-01T00:00:00ZProsthetic hand for the brain-computer interface system
Shuhaida, Yahud, Dr.; Noor Azuan, Abu Osman, Professor Ir. Dr.
The objective of the study is to develop a prosthetic hand for the usage of Brain-computer Interface (BCI) system. In the proposed BCI system the prosthetic hand was introduced as an external device controlled by the system. This hand is required to perform four essential tasks of the human hand: cylindrical grasp, key pinch, pulp to pulp pinch and tripod pinch. The hand was inspired by the perfection and complexity of the human hand. This hand consists of palm and 5 fingers with a total of 16 degrees of freedom (DOF). The phalanges of each finger was modeled as three link open chain joined at the metacarpal joint (MCP), proximal joint (PIP) and distal joint (DIP). Phalanx was made from two identical parallel aluminum plates and connected to the other segment using a bolted spacer acting as hinge joint. The Length of each segment was made such that it will form an equiangular motion path during trajectory. Each joint is actuated by its individual actuator. Two mechanisms were proposed in this study. The first mechanism is the tendon drive; used terelyne string to pull each segment to flexion. The second mechanism is a spring return; a stored resistive force in torsion spring will kick the segment to its initial position. The hand was equipped with potentiometers and force sensors for control purposes. The prototype of the prosthetic hand was tested with BCI system, in order to meet its initial objective and additional tests were carried out to evaluate its performance. An experiment to test the performance of the prosthetic hand was carried out successfully. Strength of each tendon was measured using a proof ring method and motion images were captured using video camera and analyzed using Peak Motus 7 Motion Analysis software.
Proceeding of The 3rd Kuala Lumpur International Conference on Biomedical Engineering 2006 at Kuala Lumpur, Malaysia on 11 December 2006 until 14 December 2006. Link to publisher's homepage at http://ezproxy.unimap.edu.my:2259/
2007-01-01T00:00:00Z