Nur Hidayah Ahmad Zaidi, Dr.
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/34247
This page provides access to scholarly publications by UniMAP Faculty members and researchers2024-03-29T12:11:54ZFabrication and characterization of porous F-75 for potential application in tissue engineering
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/33715
Fabrication and characterization of porous F-75 for potential application in tissue engineering
Shamsul Baharin, Jamaludin, Prof. Dr.; Tan, Wei Leng; Nur Hidayah, Ahmad Zaidi; Zuraidawani, Che Daud; Mazlee, Mohd Noor, Dr.
Porous F-75 (Co-Cr-Mo) was produced by powder metallurgy technique. F-75 powder was mixed with space holder and compacted using different pressures (300 MPa, 350 MPa, 400 MPa, 450 MPa). The green samples were sintered at 1150°C in a tube furnace under argon atmosphere. Sintered samples were examined in terms of bulk density, porosity, hardness and pore size. Microstructural analysis was carried out using a scanning electron microscope (SEM). Microstructure analysis showed that pore sizes and pore shape were influenced by different compaction pressure. The hardness of the samples increased as compacting pressure increased. Density and porosity remained constant at certain level.
Link to publisher's homepage at http://www.ttp.net/
2013-01-01T00:00:00ZDesign and development of sensing system for mines detector robot
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/33604
Design and development of sensing system for mines detector robot
Ahmad Firdaus, Ahamad Zaidi; Cherng, Yeoh Wei; Handy, Ali Munir; Nur Hidayah, Ahmad Zaidi
This paper presents the design and development of sensing system for mines detector robot. The objective of this project is to identify the optimum metal detection system and design and develop the sensing system of mines detection circuit for the landmine mobile robot. This sensing circuit of landmines detection system consists of pulse generation circuit, detector circuit, amplifier circuit, comparator circuit, microcontroller PIC18F4580 and the display result circuit through LCD screen. Size, type and shape of ferrous and non-ferrous object (landmines) will impinge on the output voltage signal from the search coil. The metal (iron) that was targeted in this project will be chosen based on an artificial detonator. Experimental results showed that this circuit able to sense ferrous and non-ferrous object (landmines) with satisfy sensitivity and consistent result.
Link to publisher's homepage at http://www.ttp.net/
2014-01-01T00:00:00ZDesign and development of remote communication system for mines detector robot
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/33375
Design and development of remote communication system for mines detector robot
Ahmad Zaidi, Ahmad Firdaus; Nur Hidayah, Ahmad Zaidi; Faydi, Kang
This paper describes the design and development of remote communication system for
mines detector robot. This project uses a PIC18F4580 microcontroller to control the robot movements and functions. A metal detector will be attached to the robot. The robot will have two operating modes; automatic and manual mode. In automatic mode, the robot will move according to a predefined track. When the robot is moving, the system produces feedbacks given by the sensors on the robot to the remote computer about the surroundings and when potential land mines are detected. In manual mode, the robot will be fully controlled by the remote computer for decision making process. All the controls and monitoring of data are displayed in a graphical user interface (GUI). The
wireless module proposed is the XBee RF modules. The XBee modules were found to perform with optimum data transfer reliability at the range equals to 25% of its maximum communication range.
Link to publisher's homepage at http://www.scientific.net/
2014-01-01T00:00:00ZKinetic and thermodynamic studies on adsorption of copper ions onto pomelo peel (citrus grandis)
http://dspace.unimap.edu.my:80/xmlui/handle/123456789/32883
Kinetic and thermodynamic studies on adsorption of copper ions onto pomelo peel (citrus grandis)
Mst. Noorzahan, Begum, Dr.; Aimi Noorliyana, Hashim; Md Fazlul, Bari, Dr.; Norzilah, Abdul Halif, Dr.; Nur Hidayah, Ahmad Zaidi; Khairel Rafezi, Ahmad, Dr.
The ability of pomelo peel (PP) as natural adsorbent to remove Cu (II) ions from aqueous solution was investigated. The influence of solution pH, contact time and temperature were evaluated. Cu (II) removal increased as the pH of the solution increased and the maximum value reached at pH 6. The adsorption was relatively fast (30 min). Adsorption kinetics followed the pseudo-second-order model. At low temperature the adsorption was not affected but at high temperature it was reduced. PP is considered as low cost material that shows potential to be applied in wastewater technology for remediation of heavy metal contamination
Link to publisher's homepage at http://www.ttp.net/
2013-01-01T00:00:00Z