Pusat Pengajian Pendidikan Jarak Jauh

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    Titanium-Based Metal-Organic Framework And Its Modifications By Thermal Decomposition For Visible Light Photocatalytic Activity
    (2024-03)
    Abdul Mubarak, Nur Shazwani
    This study is divided into three sections. Firstly, MIL-125-NH2 was prepared using a solvothermal method with a constant inert gas flow to create an inert condition. Then, MIL-125-NH2 was calcined at various temperatures under an inert atmosphere (argon gas) to produce nitrogen-doped carbon porous titanium dioxide (N-C/TiO2). Following the same procedure, two different modifications of Ni-doped and ZnO composites were prepared by varying the weight percentage (wt%). Ni-doped (NC/NiT), and ZnO composites (NC/ZnOT) were produced by subjecting the optimal wt% of both modifications through different calcination temperatures under argon gas.
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    Gerakan Environmentalisme Dan Hubungannya Dengan Proses Pendemokrasian Di Malaysia: Kajian Kes Di Perak (2008-2018)
    (2024-02)
    Abd Matalib, Mohamad Faizal
    Tesis ini mengkaji gerakan environmentalisme di negeri Perak dan impaknya ke atas proses pendemokrasian di negara ini. Bagi menjawab persoalan dan objektif kajian ini, kerangka teoritikal dan konseptual iaitu masyarakat sivil, gerakan environmentalisme dan pendemokrasian telah digunakan.
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    Research On Photovoltaic Mppt Control Method Based On Improved Bas Algorithm And Variable Step-Size Inc Method
    (2024-03)
    Li, Wenli
    Solar energy has received widespread attention and has been developed due to its distinct advantages, such as abundant reserves and not restricted by geography. However, the PV module is easily affected by external environments in practical applications, leading to a decrease in PV power. MPPT technology for the PV power system is an effective method to improve the efficacy of PV electricity conversion. Commonly used control methods include CVT method, perturbation and observation method, and incremental conductance method. These methods differ greatly in terms of required parameters, algorithm complexity, tracking speed, tracking accuracy, hardware requirements, etc. In this study, a MPPT control method based on IBAS and VSINC was proposed to obtain a better performance in MPPT.
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    Using Social Media To Support Descriptive Essay Writing And Online Interaction At Undergraduate Level: A Mixed Method Study
    (2024-01)
    Rashid, Muhammad
    This mixed method study aims at investigating the effectiveness of social media as mediating tools to support (a) descriptive essay writing and (b) online interaction at undergraduate level. To substantialize the aim of the study, the researcher selected three intact classes of BS (Bachelor of Science) 4th semester enrolled in a public sector Graduate College in Southern Punjab, Pakistan. To validate the study, a pilot study was conducted prior to the main study.
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    Trichoderma Species Biosorption Of Nickel And Cadmium From Aqueous Solutions
    (2017-01)
    Low, Pui Man
    The effect of ph on growth of trichoderma sp. In shake flask culture was studied. The highest biomass was obtained at ph 5 which is 1.45g in 100 ml of liquid media. In this research, the biosorbent was characterized by fourier transform infrared spectroscopy (ftir) and scanning electron microscope (sem), energy dispersive x-ray spectroscopy (edx) and ph point of zero charge (phpzc). The optimum biosorption conditions were determined as a function of ph, biosorbent dosage, and contact time. The equilibrium data were better fit by the langmuir isotherm model than by the freundlich isotherm. The maximum adsorption capacity of nickel and cadmium were found to be 5.456 mg/g and 2.380 mg/g respectively. The central composite design (ccd) in response surface methodology was used for designing the experiments as well as for full response surface estimation. The optimum condition for maximum removal of nickel and cadmium from an aqueous solution of 50 mg/l were as follows: ph 4.92, biosorbent dosage (0.70 g), contact time (8.28 hours) for nickel and ph 9.99, biosorbent dosage (0.60 g), contact time (11.93 hours) for cadmium. The high correlation coefficient (/?2 = 0.877 for nickel, r2 = 0.959 for cadmium) between the models and experiment data showed that the models were able to predict the removal of nickel and cadmium from aqueous solution by using trichoderma sp. Efficiently.