Universiti Teknologi Petronas

About: Universiti Teknologi Petronas is a education organization based out in Ipoh, Malaysia. It is known for research contribution in the topics: Adsorption & Ionic liquid. The organization has 6127 authors who have published 11284 publications receiving 119400 citations.

Improved energy harvesting from low frequency vibrations by resonance amplification at multiple frequencies

Abstract: This paper reports on an electromagnetic vibration energy harvester that utilizes a novel method of energy pumping based frequency up-conversion to effectively harvest energy from a broad range of low frequency (

Classification of SD-OCT images using a Deep learning approach

Abstract: Diabetic Macular Edema (DME) is one of the many eye diseases that is commonly found in diabetic patients. If it is left untreated it may cause vision loss. This paper focuses on classification of abnormal and normal OCT (Optical Coherence Tomography) image volumes using a pre-trained CNN (Convolutional Neural Network). Using VGG16 (Visual Geometry Group), features are extracted at different layers of the network, e.g. before fully connected layer and after each fully connected layer. On the basis of these features classification was performed using different classifiers and results are higher than recently published work on the same dataset with an accuracy of 87.5%, with sensitivity and specificity being 93.5% and 81% respectively.

Biodiesel production from date seed oil (Phoenix dactylifera L.) via egg shell derived heterogeneous catalyst

Abstract: This work explains the preparation of an efficient catalyst from waste chicken egg shells for exploring environment-friendly and cost-effective biodiesel production process for socio-economic growth. XRD, BET, TGA, and TPD-CO2 analysis were employed to evaluate the physicochemical properties of the prepared catalysts. The catalytic performance of the synthesized catalysts was tested in biodiesel production via transesterification from date seed oil under different reaction conditions. It was found that catalyst prepared at 900 °C exhibited excellent transesterification activity and provided maximum yield of fatty acid methyl esters up to 93.5% under optimal reaction conditions, i.e. reaction time of 1.5 h, methanol–oil molar ratio of 12:1, and catalyst amount of 5 wt.%. In addition, the catalyst exhibited substantial stability and reusability during biodiesel conversion.