Now showing items 334-344 of 344

    • Valence electron correlation energy embracing the diamond-lattice materials C through Sn 

      March, Norman H.; Rubio, Angel (Universiti Malaysia Perlis, 2008)
      By combining a recent result of March and Matthai for the energy gap G with a model of Rey and Savin, the correlation energy ec of the valence electrons embracing C, Si, Ge and Sn can be estimated. While Sn is thereby ...
    • Vegetable oil as bio-lubricant and natural additive in lubrication: A review 

      Nor Azmmi, Masripan; Mohd Azli, Salim; Ghazali, Omar; Muhd Ridzuan, Mansor; Adzni, Md Saad; Nurfaizey, Abdul Hamid; Mohamad Imran, Syakir; Feng, Dai (Universiti Malaysia Perlis (UniMAP), 2020-05)
      Due to the decreasing petroleum reserves and environmental issues, the approach of using vegetable oil as lubricant has drawn the researchers’ attention. In comparison to mineral-based lubricant, the vegetable based-oil ...
    • Vertical‐Cavity Surface‐Emitting Lasers for Ultra‐High Speed Photonics 

      Moustafa, Ahmed; Hameeda R. Ibrahim; Fumio Koyama (Universiti Malaysia Perlis (UniMAP), 2018-04)
      We propose a vertical‐cavity surface‐emitting laser (VCSEL) with a transverse‐coupledcavity (TCC) for a larger enhancement of the modulation bandwidth used in ultra‐highspeed photonics. The dynamics of the TCC‐VCSEL were ...
    • Vision-based assets tracking and maintenance management on the production floor of integrated semiconductor devices 

      M. T. Chew; F. Alam; G. Sen Gupta; D. Le (Universiti Malaysia Perlis (UniMAP), 2020-05)
      The paper presents a cost-effective system for hardware assets (transportation carts and integrated circuit (IC) carriers) tracking and maintenance management on the production floor of a large-scale IC manufacturing plant. ...
    • Wake potential and induced forces for protons in solids 

      Al-Ani, Riayhd K. A. (Universiti Malaysia Perlis, 2011)
      The wake potential associated with the passage of swift protons through a solid material using cylindrical coordinates is studied. Full results of the wake potential as a function of space when a proton moves parallel with ...
    • Wake potential of swift ions in copper target 

      Nabil Janan, Al-Bahnam; Khalid A., Ahmad; Abdulla, Ahmad Rasheed (Universiti Malaysia Perlis, 2016)
      We investigate the interaction of proton with a solid target, describing the wake effects by taking fitted parameters with experimental values of energy loss function ELF for copper using the dielectric function of random ...
    • Wet transfer process for MEMS freestanding PMMA/Graphene membrane development 

      Norliana, Yusof; Badariah, Bais; Norhayati, Soin; Burhanuddin, Yeop Majlis (Universiti Malaysia Perlis (UniMAP), 2020-12)
      Process of transferring poly (methyl methacrylate) (PMMA)/Graphene layer to form a freestanding membrane requires a proper method to ensure that the membrane is well suspended with high graphene coverage. This paper ...
    • X-ray and dielectric studies of ferroelectric phase in the Ba1-x(Yb0.5 Na0.5)x TiO3 system for low doping level 

      Khemakhem, L.; Kriaa, I.; Derbel, M.; Abdelmoula, N. (Universiti Malaysia Perlis, 2009)
      Ceramics of solid solution Ba1-x(Yb0.5Na0.5)xTiO3 were sintered in the temperature range 1220-1400°C. Dielectric properties of ceramics belonging to the whole composition domain were investigated in a broad range of ...
    • X-ray diffraction and mossbauer spectrometry investigations of invar nanoparticles produced by mechanical alloying 

      Boudinar, N.; Djekoun, A.; Chebli, A.; Otmani, A.; Bouzabata, B.; Greneche, J. M. (Universiti Malaysia Perlis, 2010)
      Fe-Ni ultra-fine particles were prepared by mechanical alloying and phase transformation during mecahnical alloying was studied. Results show that phase transformation tendency is different during mechanical alloying of ...
    • Xenon flash lamp annealing of large area silicon photodetector 

      Raid, A. Ismail; Omar, A. Sultan; Razak, A. Al-Salam (Universiti Malaysia Perlis, 2012)
      Xenon flash lamp with 100 μm pulse duration was used to enhance the performance of large area (1cm2) diffused silicon photodiodes. Leakage current, rectification, and photoresponse of silicon photodiodes after lamp annealing ...
    • Z-Scan measurement of optical nonlinearities for (3GO) dye 

      Ali H., Al-Hamdani (Universiti Malaysia Perlis, 2013)
      In this paper a sensitive single-beam technique for measuring both the nonlinear refractive index and nonlinear absorption coefficient for 3GO dye were reported. Descriptions for the experimental details and theoretical ...