N.K. Madzhi

N.K. Madzhi
Universiti Teknologi MARA | UiTM

About

51
Publications
39,580
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189
Citations
Citations since 2017
18 Research Items
129 Citations
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201720182019202020212022202305101520
201720182019202020212022202305101520

Publications

Publications (51)
Article
Full-text available
The evolution of various rubber tree clone has been introduced by Malaysian Rubber Board since 1928 and it is known as Rubber Research Institute Malaysia (RRIM) clone series. To support this, it is suggested research to investigate the behavior of the clone series with the development from a sensing device with several opted NIR wavelength ranges t...
Conference Paper
This paper presents the regulation of light intensity control of a greenhouse system by using human machine interface. This objective of this paper is to support in the growth of plant even in sunless environment by using light emitting diode (LED). To design the prototype of a greenhouse system, it was built and instrumented with appropriate senso...
Article
Full-text available
This paper presents comparative investigation on the classification of rubber latex clone series using Artificial Neural Network (ANN) based on optical sensing technique. Rubber Research Institute of Malaysia (RRIM) introduced the rubber breeding program known as RRIM clone series in order to increase the yield of latex production and the rubber wo...
Conference Paper
This work aims to conduct a perception survey on the level of retainment and occupational safety and health (OSH) readiness in terms of knowledge and skills among semester 7 students (final year students) in the Bachelors Degree in Engineering (Electronics) at the Faculty of Electrical Engineering (FEE), Universiti Teknologi MARA (UiTM) after compl...
Article
Full-text available
The purpose of this project is to detect the ripeness and quality of the watermelon particularly for red watermelon. The ripeness of the watermelon will be evaluated by using near-infrared spectroscopy sensor (NRIS). The color wavelength will classify the ripeness of the watermelon. An infrared light will be used to get the appropriate wavelength f...
Article
Full-text available
Dry rubber content (DRC) is one of main material existing inside latex. It is usually in ranged of 25% - 45% of rubber latex. Statistical analysis are done to determine the discrimination of dry rubber content of latex between healthy and white root infected rubber tree. Based on 150 rubber trees and 10 clones tested, parametric test which include...
Conference Paper
This paper presents the development of an online-based continuous-assessment repository system designed to cater the needs for both lecturers and students. Conventional methods of notifying continuous assessment marks, e.g. test or assignment marks to students include displaying the students' marks on the bulletin boards or merely by returning the...
Conference Paper
RRIM clone is a rubber breeding series produced by RRIM (Rubber Research Institute of Malaysia) through “rubber breeding program” to improve latex yield and producing clones attractive to farmers. The objective of this work is to analyse measurement of optical sensing device on latex of selected clone series. The device using transmitting NIR prope...
Article
A study of color spectrum properties for pure and non-pure latex in discriminating rubber clone series has been presented in this paper. There were five types of clones from the same series being used as samples in this study named RRIM2002, RRIM2007, RRIM2008, RRIM2014, and RRIM 3001. The main objective is to identify the significant color spectru...
Article
The phenomenon of rubber consumption in Malaysia has been increased parallel with the world demand. Hence, it is necessary for the cultivators to gain some knowledge for differentiating various rubber tree clone breed which may give them high latex yield after 5 years or more of planting. This paper discusses the identification of several rubber tr...
Conference Paper
Full-text available
Three different high temperature superconductors namely Hg 0.75 Pb 0.25 Sr 2-y Ba y Ca 2 Cu 3 O 8+δ have been successfully prepared by solid state reaction. The substitution for all the three compounds were taken as y=0.1, 0.2 and 0.25. The optimum calcinations were 800 C 0 and for sintering were within 855-860 C 0. Electrical resistivity, using fo...
Conference Paper
Full-text available
Previously, many researches had been done on non-invasive using near-infrared sensing. Sia had investigated near-infrared sensing using signal penetrating finger method. However, by using finger penetration, there are no results obtained. He only obtained signal using glucose concentration. Therefore the objectives of this research are to investiga...
Conference Paper
The impact when a motorcyclist involves in a high speed accident without wearing a helmet is very dangerous and can cause fatality. Wearing a helmet can reduce shock from the impact and may save a life. There are many countries enforcing a regulation that requires the motorcycle's rider to wear a helmet when riding on their motorcycle, Malaysia is...
Conference Paper
This project uses a non-invasive method for measuring the blood glucose concentration levels. By implementing two infrared light with different wavelength; 940nm and 950nm based on the use of light emitting diodes and measure transmittance through solution of distilled water and d-glucose of concentration from 0mg/dL to 200mg/dL by using a 1000nm p...
Conference Paper
This paper presents the development of microcontroller based potentiometric indicator system for integration with piezoresistive MEMS sensor. The purpose system involved the integration between hardware and software subsystem. For hardware subsystem, the design of potentiometric circuit was tested using P-spice software and breadboard circuit. Then...
Conference Paper
This paper presents a comparative study on low noise precision difet operational amplifier, OPA111 and low noise operational amplifier, OP27 for potentiometric transduction circuit. Methods for integration of piezoresistive MEMS sensor with the potentiometric transduction circuit have reported successes. There was a need for a low noise operational...
Conference Paper
This work has focused on the design simulation analysis of a Polysilicon-based CMOS micromachined Piezoresistive Microcantilever beam for glucose sensing application. In principle, adsorption of glucose on a functionalized surface of the microfabricated cantilever will cause a surface stress and consequently the cantilever bending. In this paper, t...
Conference Paper
This paper concerns miniaturization using Surface Mount Technology (SMT) of potentiometric indicator system for measuring human stress. The piezoresistive MEMS sensor is integrated with potentiometric indicator system that converts a biochemical signal into a measurable signal. The overall project involved transduction stage, filtering, voltage fol...
Conference Paper
This research have been done in order to know the effect of mechanic characteristics to the microactuator such as microcantilever beam deflection. From there, we also observed the effect of voltage and initial condition to the microcantilever displacement and the transient response characteristics. In this research, we used the analytical method an...
Article
Full-text available
The measurement of glucose is of great importance in clinical diagnosis. This is especially essential for the continuous monitoring for example in a patient suffering from diabetes mellitus which is caused by the high levels of glucose in human physiological fluid. Even though many research have been done for glucose measurement, there are still ma...
Conference Paper
This paper concerns the development of a potentiometric instrumentation circuit for integration with a PZR microcantilever biosensor to detect human stress. It embodies the design of transduction, filtering, stabilization and linearization of micro-signals from a biosensor. The sensing principle is based on immobilization of the bio-receptor to pro...
Article
In principle, adsorption of biological molecules on a functionalized surface of a microfabricated cantilever will cause a surface stress and consequently the cantilever bending. In this work, four different type of polysilicon-based piezoresistive microcantilever sensors were designed to increase the sensitivity of the microcantilever s sensor beca...
Article
This paper describes design and development of transduction, filtering, stabilisation and linearization stages of a potentiometric circuit to convert micro-signals from a PZR microcantilever biosensor into readable signals for human stress. The biosensing principle is based on immobilization of the bioreceptor to produce a biochemical reaction. The...
Article
This paper presents a study on electrode for the amperometric detection of human stress based on salivary alpha amylase, emulated with different concentration of glucose, with the flow injection analysis biosensing system. Amperometric detection is an electrochemical voltammetric measurement approach, where the current intensity in a detection cell...
Article
This paper deals with the development of Piezoresistive Microcantilever biosensor and the signal transduction to detect human stress by using salivary alpha amylase activity. A Piezoresistive Microcantilever biosensor can be used to detect saliva-amylase activity by deflecting upon interaction with a specific receptor. By measuring the amount of be...
Article
This paper deals with the development of Piezeoresistive Microcantilever biosensor and the signal transduction to detect human stress by using salivary alpha amylase activity. A Piezoresistive Microcantilever biosensor can be used to detect saliva-amylase activity by deflecting upon interaction with a specific receptor. By measuring the amount of b...
Article
This paper deals with the development of a low cost self-sensing Piezeoresistive Microcantilever Biosensor to detect human stress using salivary alpha amylase activity. The salivary alpha amylase enzyme will immobilize on to the Piezeoresistive Microcantilever biosensor to detect activity during the enzyme responses. When the Microcantilever beam d...
Conference Paper
This paper concerns the development and design of filtering and linearization stage of potentiometric transducer to measure human stress level based on salivary amylase activity. The design of this new way approached is implemented using Cadence OrCAD Capture CIS 15.7 software and hardware construction and troubleshooting. From the previous researc...
Conference Paper
Full-text available
This paper concerns the development of a potentiometric transduction circuit for a piezoresistive MEMS sensor to detect human stress. The biosensor is comprised of a bioreceptor and a transducer. The sensing principle is based on immobilization of the bioreceptor to produce a biochemical reaction. The novel piezoresistive microcantilever sensor int...
Article
Previous works on the effects of salivary alpha amylase in respond to various stressors report encouraging findings on it being a good indicator of stress. Ellestad protocol is a clinical procedure to screen for coronary artery disease by introducing exercise induced physical stress. If a salivary based biomarker profile in accordance to a stress t...
Article
This paper describes the fabrication process of a piezoresistive microcantilever sensor that is used as a platform for biological sensing such as salivary amylase‐activity. The 0.5 μm‐thick piezoresistive sensors are made on polysilicon‐based cantilever beam. This surface micromachined microcantilever is based on silicon wafers and fabricated usin...
Article
This paper presents a design for a low cost 2-electrodes conductivity control system for small scale wastewater treatment system, such as that from etching process of printed circuit board. It involves the design of a conductivity sensing probe, its associated control circuitry and an actuation mechanism. The conductivity sensor applies a direct cu...
Article
Full-text available
This work focuses on the design and finite element analysis of a polysilicon-based piezoresistive microcantilever beam for application in human stress measurement. In principle, adsorption of saliva amylase on a functionalized surface of the microfabricated cantilever induces surface stress and consequently the bending of the cantilever beam. In th...

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