Browsing Ayu Wazira Azhari, Ts. Dr by Author "ayuwazira@unimap.edu.my"

Now showing items 1-17 of 17

    • Cloud based models in determination of solar radiation: A review 

      Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Abdul Haqi, Ibrahim (World Scientific and Engineering Academy and Society, 2009-07-01)
      Meteorological data has been used in determining of global and diffuse solar radiation for years. Various methods have been developed and proved to be accurately comparable to the measured value. Among all, the most common ...

    • Estimation of solar energy potential in East Malaysia by using Satellite Images 

      Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Abdul Haqi, Ibrahim (Universiti Malaysia Sarawak, 2007-12-27)
      Solar energy has been identified as one of the most potential alternative energy resources as Malaysia receives abundant sunshine all year long. Even though there are many solar instruments that can be used in measuring ...

    • Germination of ficus seeds for rehabilitation purposes 

      Ayu Wazira, Azhari; Abdul Haqi, Ibrahim; Ain Nihla, Kamarudzaman (Universiti Sains Malaysia (USM)School of Materials & Mineral Resources Engineering (SMMRE), 2009-06-01)
      Quarrying industries have played an important role in our country for a long time. As the need of quarrying products arises, most companies have been neglecting one of the most important aspects in quarrying, which is the ...

    • Heteroepitaxial growth of vacuum-evaporated Si-Ge films on nanostructured silicon substrates 

      Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi (Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 2015)
      In this study, a low-cost vacuum-evaporated technique is used in the heteroepitaxial growth of Si-Ge films. Three different surface variations are employed: i.e. polished Si, Si micropyramids and Si nanopillars profiles. ...

    • An investigation of crystalline thin-film Six/Ge 1-x/Si solar cells 

      Adnan K Shafeeque, Ali; Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi (Institute of Electrical and Electronics Engineers Inc., 2013-06)
      Thin film solar cells have attracted a lot of attention due to their potential for increased efficiency and reduction in cost of material. Thin-film crystalline silicon solar cells are fundamentally limited in efficiency ...

    • Investigation of XeF2 dry etching for contact isolation of screen printed IBC solar cell 

      Mohd Khairunaz; Suhaila, Sapeai; Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi (Institute of Electrical and Electronics Engineers Inc., 2013-06)
      We demonstrated the use of Xenon Difluoride (XeF2) plasma less vapor etching for isolation of n and p regions in screen-printed interdigitated back contact (IBC) solar cell. The fabrication process is free from lithography ...

    • Land suitability mapping for implementation of precision farming 

      Norasmanizan, Abdullah; Mohd Sabri, Hussin; Ayu Wazira, Azhari; Mahmad Nor, Jaafar (Institute of Electrical and Electronics Engineers Inc., 2011-09)
      This paper studies the potential of satellite imagery in mapping of soil compaction and land suitability using Remote Sensing and GIS method. GIS and remote sensing, play an important role in environmental study, monitoring ...

    • A new approach for predicting solar radiation in tropical environment using satellite images - Case study of Malaysia 

      Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Azami, Zaharim; Mohamad Ahmed, Alghoul (World Scientific and Engineering Academy and Society, 2008-04)
      Satellite images have been indentified as an alternative and accurate method for predicting average annual daily solar radiation of a specific location. These images can be use to predict the performance and sizing of ...

    • Numerical analysis of bifacial solar cell using PC1D software 

      Suhaila, Sapeai; Mohamad Yusof, Sulaiman; Mohd Khairunaz; Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi (Institute of Electrical and Electronics Engineers Inc., 2013-06)
      Computer-based simulations play a critical role in the design, development, and functionality of solar cells. Device modeling techniques substantially reduce the time and costs through optimization of process steps, choice ...

    • Optical characterization of SixGe1-x films grown on nanostructured Si substrates 

      Ayu Wazira, Azhari; Adnan K Shafeeque, Ali; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi; Uda, Hashim (Institute of Electrical and Electronics Engineers Inc., 2014-10-15)
      High quality Ge and SixGe1-x films grown on Si substrates are attractive for a wide range of applications in optics, optoelectronics, and high efficiency solar cells. In this study, heteroepitaxial growth of Ge on ...

    • Optimization of silver-assisted nano-pillar etching process in silicon 

      Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Mohd Khairunaz, Mat Desa; Saleem Hussain, Zaidi (Elsevier, 2015-12-01)
      In this study, a respond surface methodology (RSM) model is developed using three-level Box-Behnken experimental design (BBD) technique. This model is developed to investigate the influence of metal-assisted chemical etching ...

    • Organic pollutants removal from diluted palm oil mill effluent (POME) through Sono–Fenton–nZVI process 

      Mohd Raihan, Taha, Prof. Dr.; Abdul Haqi, Ibrahim; Ayu Wazira, Azhari; Mahyun, Ab Wahab (Universiti Malaysia Perlis (UniMAP), 2012-06-18)
      In this study, an advance Fenton process called sono-Fenton-nZVI process was used to remove organics content from palm oil mill effluent (POME). Factors such as pH, sonication intensity and sonication time were studied in ...

    • PC1D analysis of thin-film crystalline SixGe1-x/Si solar cells 

      Adnan K Shafeeque, Ali; Ayu Wazira, Azhari; Samir, Ahmad; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi (Institute of Electrical and Electronics Engineers Inc., 2014-10-15)
      Inability to achieve complete optical absorption in thin-film crystalline Si (TF c-Si) solar cells fundamentally limits efficiency. Therefore, materials with high absorption across the entire solar spectrum are highly ...

    • The potential of satellite images in soil compaction study for implementation of precision agriculture 

      Norasmanizan, Abdullah; Ayu Wazira, Azhari; Mahmad Nor, Jaafar, Assoc. Prof. Dr.; Mohd Sabri, Hussin; Salwa, Mohd Zaini Makhtar (Universiti Malaysia Perlis (UniMAP), 2012-06-18)
      This paper observed the potential of satellite imagery in soil compaction study based on the spectral analysis. The aim of this study is to produce the potential of soil compaction map through the measuring compactness ...

    • Recycling potential of waste materials as fire resistance material 

      Ayu Wazira, Azhari; Abdul Haqi, Ibrahim; Mahyun, Ab Wahab; Salwa, Mohd Zaini Makhtar; Azmil, Mohd Aris (Universiti Teknologi Malaysia (UTM), 2009-06-02)
      In this paper, the possibility of using waste materials as a major component for the manufacturer of thermal insulating elements is was studied. It is believed that the use of fly ash combined together with red gypsum which ...

    • Role of micro and nanostructures in enhancing near IR optical absorption in Silicon 

      Cheow Siu, Leong; Ayu Wazira, Azhari; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi (Institute of Electrical and Electronics Engineers Inc., 2014-10-15)
      Role of micro and nanostructures in enhancing IR transmission in Si wafers has been investigated. Based on feature dimensions, incident light interaction can be described in terms of: (a) geometrical optics for wavelengths ...

    • Synthesis and characterization of self-assembled, high aspect ratio nm-scale columnar silicon structures 

      Ayu Wazira, Azhari; Boon Tong, Goh; Suhaila, Sapeai; Mohd Khairunaz; Kamaruzzaman, Sopian; Saleem Hussain, Zaidi (Institute of Electrical and Electronics Engineers Inc., 2013-06)
      The aim of this work is to synthesize nm-scale columnar structures in Si principally for solar cell applications. These structures are also desirable as templates for heteroepitaxial growth of SixGe1-x. A nanostructured ...