Hashimah Hashim

ORCID: 0000-0003-3257-8432
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About
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Research Areas
  • ZnO doping and properties
  • Gas Sensing Nanomaterials and Sensors
  • Copper-based nanomaterials and applications
  • Semiconductor materials and devices
  • Analytical Chemistry and Sensors
  • Transition Metal Oxide Nanomaterials
  • Experimental Learning in Engineering
  • Water Quality Monitoring Technologies
  • Spectroscopy and Chemometric Analyses
  • TiO2 Photocatalysis and Solar Cells
  • Innovative Teaching Methods
  • Engineering Education and Curriculum Development
  • Conducting polymers and applications
  • Photovoltaic System Optimization Techniques
  • Psoriasis: Treatment and Pathogenesis
  • Advanced DC-DC Converters
  • Cutaneous Melanoma Detection and Management
  • Advancements in Semiconductor Devices and Circuit Design
  • Thin-Film Transistor Technologies
  • Electronic and Structural Properties of Oxides
  • Advanced Sensor Technologies Research
  • Advanced Measurement and Detection Methods
  • Solar Thermal and Photovoltaic Systems
  • solar cell performance optimization
  • Organic Electronics and Photovoltaics

Universiti Teknologi MARA
2015-2024

Universiti Teknologi MARA System
2013-2024

National University of Malaysia
2023

Universiti Teknologi Petronas
2019-2020

Institute of Electrical and Electronics Engineers
2018

Institute of Mechanical Engineering and Industrial Mangement
2016

Universidade do Porto
2016

La Trobe University
2010-2011

Faculty (United Kingdom)
2008

Universiti Tenaga Nasional
2007

Nanostructured CuO thin films were deposited onto quartz substrates by sol-gel dip coating technique. The precursor solution was prepared dissolving copper acetate powder into isopropanol with molarity of 0.25M. Preheating and annealing temperature fixed at 250°C 600°C respectively. This study focused on various film thicknesses varying the frequent number layers. effect thickness electrical, surface morphology optical properties studied. examined using field emission scanning electron...

10.1088/1757-899x/99/1/012007 article EN IOP Conference Series Materials Science and Engineering 2015-11-19

Investment and operating costs are the biggest obstacles in modernizing fish ponds an otherwise very lucrative industry i.e. food production, this region. Small-scale farmers running on small could not afford to hire workers man daily operations which usually consists of monitoring water levels, temperature feeding fish. Bigger scale enterprises have some kinds automation for replacement. These entities consider employing pH dissolved oxygen (DO) sensors ensure health growth fish, sooner or...

10.1088/1757-899x/340/1/012014 article EN IOP Conference Series Materials Science and Engineering 2018-03-01

In this paper, the classification of five types rubber leaf disease by using spectrometer and SPSS are presented. There that have been used as samples which Oidium secondary fall, Fusicoccum Leaf Blight, Bird eye's spot Anthracnose. The reflectance infected leaves sample is measured MCS600 Carl Zeiss spectrometer. Besides, Aspect Plus, a universal spectroscopy program from manages to measure spectral regions sample. Further analysis justification completed approximate statistical tools SPSS....

10.1109/ams.2010.67 article EN 2010-05-01

In this era, the Internet of Things (IoT) has mainly been used in advancement technology since become part our daily life and one smart inventions to implement with IoT is a health monitoring system. Therefore, healthcare system based on multiple sensors security introduced paper. The was designed pulse sensor for heartbeat, an infrared thermometer body temperature, DHT11 humidity room temperature. relied Arduino monitor patient's condition collected data were displayed LCD implementation...

10.1109/icpea53519.2022.9744712 article EN 2022-03-07

End-of-life (ELV) initiatives are at its infancy stage which required multi-level involvement of the public, non-government organisations (NGO), industries, local governments and government agencies. Its implementations revolve around disposing old cars disassembly operations, involve extracting valuable materials systematically remaining waste. During these it is expected that pollution, especially air pollution released into environment. Without proper understanding controls, will harm...

10.1109/icitacee55701.2022.9924080 article EN 2022-08-25

Copper oxide were prepared by sol-gel technique and deposited onto quartz substrates as thin films using spin coating method. The aim of this research was to study the effects different speeds copper on electrical optical properties films. Five samples with 1000, 1500, 2000, 2500 3000 rpm annealed at 600°C for 30 minutes. UV-Vis spectrophotometer two-point probe used characterize Based results obtained, it revealed that conductivity reduce increase. calculated band gap resistivity also...

10.1088/1757-899x/99/1/012032 article EN IOP Conference Series Materials Science and Engineering 2015-11-19

Abstract The effects of plant diseases on agricultural production worldwide contribute to significant economic and post-harvest losses. To maintain the sustainability farming sector, early detection pathogens is essential. Non - destructive methods for tracking health conditions plants in real-time applications are among most realistic feasible this regard. Owing non contact measuring devices, thermal imaging advancement has become an essential technique all fields. Thermal operates by...

10.1088/1755-1315/540/1/012052 article EN IOP Conference Series Earth and Environmental Science 2020-07-01

This project focuses on the effect of annealing temperature to electrical properties deposited Zinc Oxide (ZnO) thin film. ZnO solutions made from acetate dehydrate (ZnAC), 2-Methoxyethanol and monoethanolmine (MEA) are onto glass substrates using spin coating technique. Deposited films annealed at various temperatures 350degC 500degC in furnace (Preterm Furnace) for 1 hour. The is investigated. characterized Current-Voltage (I-V) measurement unit (Advantest R6243). I-V characterization...

10.1109/citisia.2008.4607347 article EN 2008-07-01

The implementation of outcome based education (OBE) on non-examinable courses such as case study or mini project, has eliminated the conventional ways assessment at Faculty Electrical Engineering, Universiti Teknologi MARA. In order to facilitate process, an evaluation system been developed assist lecturer. This dynamic consists several criteria for studentspsila raw marks. outputs are in terms indicator plots representing course and programme outcomes achievement scores. Hence, a continual...

10.1109/fie.2008.4720675 article EN 2008-10-01

In this study, a composite plasticized polymer electrolytes (CPEs) compassed of 30% methyl grafted natural rubber (MG30) doped with lithium triflate (LiTf) and silicon dioxide (SiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> ) was prepared by solution cast technique. The polymer-salt complexation has been confirmed ATR-FTIR spectral studies. CPEs were then investigated as an ionic conducting polymer. conductivity the measured AC...

10.1109/cssr.2010.5773825 article EN 2010-12-01

Solar power generation systems typically consist of a solar array and DC-DC converter. The converter is device that converts the direct current (DC) output from (PV) panel into different DC voltage level, such as boost This research aims to develop with inverter increase supply electrical grid. was simulated using Simulink MATLAB. analysis voltage, current, performed. Then, steady PV depending on irradiation input at analyzed. result shows when increased, then would also increase. study...

10.1109/icpea60617.2024.10498619 article EN 2024-03-04

The resistivity of soil or ground is one the important factors to be considered when choosing for a suitable grounding spot area. Problems may occur if area around facility not hence need move an far away from and caused increase in overall cost installation. It known that some parties involves work uses salt treatment as solution this matter. This project aims investigate whether act adding proper high soil. Experiments were conducted where different concentrations water which also Sodium...

10.1109/peoco.2013.6564528 article EN 2013-06-01

The genesis of this research work was constituted for the issue classifying characteristics harmonics caused by partial discharge (PD). This undertaken based on hypothesis that harmonic orders different types Partial Discharge (PD) can be classified. Experimental initially performed and data obtained from it validated. then followed an analysis in order to extract distinguish information distortion. findings show PD produce distinctive distinguishable Total Harmonic Distortion (THD) levels....

10.5755/j01.eee.19.9.2545 article EN cc-by Elektronika ir Elektrotechnika 2013-11-11

We have systematically investigated the current-voltage (I-V), absorbance and optical band gap of TiO2 thin film prepared through varying molarity precursor by sol-gel spin coating technique. In addition to electrical characteristics, surface morphology was examined using Atomic Force Microscope (AFM). From image AFM, we were able observe uniformity film. experimental results, found that is optimized at 0.2M sample. It also that, as increased, there tendency resistivity decrease. Not only...

10.1088/1757-899x/99/1/012006 article EN IOP Conference Series Materials Science and Engineering 2015-11-19

The COVID-19 pandemic has had dramatic effects on the socio-economic and well beings of Malaysians. objective study is to find university students both technical side, such as sufficiency infrastructure internet support online teaching learning (T&amp;L), social stress level focus study. nationwide effect Malaysian varsities was conducted at end 2020. There are many important issues uncovered in this ranging from internet-ready programs, psychological perspectives. It shall provide...

10.47836/pjssh.29.4.34 article EN cc-by-nc-nd Pertanika journal of social science & humanities 2021-12-14

Photovoltaic systems, also known as solar cells, are gaining popularity renewable and sustainable energy sources. However, during the design phase, it is critical to have a reliable flexible PV model that allows for an accurate estimation of generated electricity under various operating conditions. Not only that, but initial cost system quite high; thus, good performance generators used required before installing system. The goal this paper investigate I-V P-V cell characteristics single...

10.1109/icpea53519.2022.9744703 article EN 2022-03-07

This paper presents a border segmentation for dermatological of psoriasis skin lesions. Several major lesions' images were digitally captured under controlled environment. The combination use several filtering techniques, morphological processing techniques and thresholding lesion boundary giving sufficiently detailed borders are sensitive to spurious small scale structure. results in series position estimates increasingly finer while eliminating edges resulting from noise other image detail.

10.1109/tencon.2004.1414842 article EN 2004-01-01

A new single-phase dual converter topology using matrix is presented. The subjected to operating various passive loads during investigations. Basic DC motor models are also simulated study the behavior and operation of converter. Boost rectifier technique for power factor improvements presented achieving low total harmonic distortion (THD) level. Selected simulation experimental results verify operation.

10.1109/iciea.2008.4582699 article EN 2008-06-01

Titanium dioxide, (TiO2) is transparent to visible light and excellent in optical transmittance. In this experiment, TiO2 thin films have been fabricated on glass substrates by sol-gel dip coating method. Sol-gel technique can provide corrosion protection performance produce thick coating. Due the coating, possibility get a crack film high. Therefore, paper investigate crack-free for sensor application where it needed most. The were subjected different molar concentration solution with...

10.1088/1757-899x/340/1/012009 article EN IOP Conference Series Materials Science and Engineering 2018-03-01

Kahoot is a new application suitable for approach of teaching in classrooms. It simple that can be used by lecturers at universities. The lecturers' laptops connected to video projector, with access wireless network and the students' smartphones, tablets or could utilized enhance students-lecturer interactions, as well boost motivations, engagements learning. aims this paper show results from response on one assessment tools. was during quizzes session classroom particular topic. Students...

10.1109/iceed.2018.8626899 article EN 2018-11-01

This paper discusses the roles of professional engineers (PEs) who are attached to Institutions Higher Learning (IHLs) and how their contributions as important counterparts in industry. highlights for PEs at IHLs based on a survey conducted selected Malaysia. Academician-professional have crucial responsibilities develop graduates later promote safer cutting-edge engineering solutions. These new technologies will make Malaysia an environmentally healthier place further prepare towards...

10.5539/ies.v6n6p137 article EN cc-by International Education Studies 2013-05-24
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