Browsing Electronic and Electrical Engineering - Scholarly Publications by Issue Date

Now showing items 1-20 of 48

  • Analysis of a synchronous reluctance machine with an auxiliary single-phase winding 

    Ojo, O; Dong, G; Omoigui, M (International journal of Electronic and Electrical Engineering, 10/1/2003)
    A three-phase synchronous reluctance machine having an axially laminated rotor structure and an auxiliary DC-source-fed single-phase control winding has utility as either a high-speed generator or a high-torque low-speed ...
  • Reliability investigation of the Nigerian Electric Power Authority transmission network in a deregulated environment 

    Momoh, A.; Komolafe, O; Omoigui, M (International journal of Electronic and Electrical Engineering, 11/12/2003)
    The paper presents the findings of reliability investigation carried out on the 330 kV high voltage transmission network of the Nigerian Electric Power Authority (NEPA). The system made up of three hydro generating stations ...
  • Transport properties of PbSnI4 

    kuku, titilayo A.; adeosun, O.S; akande, A.R; adiguel, osman (Solid State IonicsA, 1988-10)
    PbSnI4 has been prepared from equimolar amounts of PbI2 and SnI2. X-ray and DSC measurements show the material to be uniphase in the temperature range 30 to 400°C; it has a tetragonal structure and melts at 379°C. The ...
  • Implementable soft decision decoding schemes 

    Olaniyan, O.O (International Journal of Electronics, 1989-03)
    An implementable soft decision decoding algorithm is described. The scheme, which can be used to improve the performance of any hard decision decoder, is based on an iterative search method that tests relatively few possible ...
  • Oxidation-induced changes in the electro-optical properties of thin copper films 

    Adegboyega, G.A (Il Nuovo Cimento D, 1989-07)
    The room temperature oxidation of vapour deposited copper films has been investigated as a function of film thickness and time by the sheet resistance and optical transmittance measurements. An increase of both sheet ...
  • Structural and ionic transport properties of some A2BX4 (A=Cu, B=Pb, Sn, X=Br, I) compounds. 

    Kuku, T.A; Erharhine, P.O; Chiodelli, G.; Akande, A.R. (1990)
    The compounds Cu2PbBr4, Cu2SnI4, and Cu2PbI4 have been synthesized as stable phases in the CuBr-PbBr2, CuI-SnI2, or CuI-PbI2 binary systems. Cu2PbBr4 is cubic (a0=9.170 A ̊), whereas Cu2SnI4 and Cu2PbI4 are hexagonal with ...
  • Compositional studies of various metal oxide coatings on glass 

    Ajayi, E.O.B; Akanni, M.S; Lambi, J; Jeynes, C; Watts, J (Thin Solid Films, 1990-02)
    Oxide films were deposited on soda-lime glass substrates by pyrolysis of indium, copper, chromium and aluminium acetylacetonates. Ion beam analysis and X-ray photoelectron spectroscopy were performed showing that the ...
  • Some aspects of tropical rainfall and their effect on microwave propagation 

    Ajayi, G.O (International Journal of Satellite Communications, 1990-05)
    Some characteristics of tropical rain rate and raindrop size distribution are briefly reported, making use of the data obtained at locations in Nigeria. Models and empirical relations have been obtained for the computation ...
  • Intrinsic gettering of Cr impurities in p-type Cz silicon 

    Adegboyega, G.A; Poggi, A ( physica status solidi (a, 1990-09)
    The gettering of chromium impurities by means of high temperature oxygen precipitates is studied by means of resistivity, lifetime, and infrared absorption spectroscopy measurements. The results show that the density of ...
  • Precision Measurement of Rotor Angle of a Microsynchronous Alternator 

    Omoigui, Michael (IEEE Xplore, 1991)
    A precision instrument used for the measurement of rotor angles of a laboratory microalternator is described. The measurement is performed by integrating digital signals derived from a phase-locked loop (PLL) reference ...
  • The Functions of Language in Herbalist-Client Interaction in Yoruba Traditional Medicine 

    Adegbite, Wale (1991)
    A piece of language in use or 'text' can be studied from three vantage points. While sociological, socio-linguistic or socio-psychological approach will be interested in studying the social uses of (parts of) the text or ...
  • Some Features of Language Use in Yoruba Traditional Medicine 

    Adegbite, Wale (1993)
    Yoruba traditional medicine (YTM) is a system which basically incorporates a four-square intersection of two pairs of terms in relation to medicine, viz. positive/negative and personal/communal. In the intersection of ...
  • Photoconductivity of MOCVD CdS thin films 

    Adedeji, A.U; Eleruja, M.A; Azi, S; Okulaja, O (Journal of Materials Science Letters, 1995-01)
    ... [2,3,4] Many techniques have been reported in deposition of CdS thin films. These include evaporation, sputtering, spray pyrolysis, molecular beam epitaxy (MBE) technique, photochemical deposition, successive ionic ...
  • Variations in raindrop size distribution and specific attenuation due to rain in Nigeria 

    Adimula, I.A; Ajayi, G.O (annals of telecommunications - annales des télécommunications, 1996-01)
    Les distributions des tailles des gouttes de pluie ont été mesurées en trois lieux du Nigéria (Calabar, Ile-Ife et Zaria). Les données collectées pendant trois ans ont servi à obtenir des modèles de ces distributions pour ...
  • The effects of oxygen precipitates on the electrical properties of silver impurities in p-type silicon 

    Adegboyega, G.A; Passari, L; Butturri, M.A; Susi, E (1996-07)
    Some characteristics of the silver impurity in silicon with and without oxygen precipitates are studied by means of the four-point probe, minority carrier lifetime, and infra-red absorption spectroscopy measurements. The ...
  • Electrical Properties of Silver Impurities and their Annealing Behaviour in p-Type Fz Silicon 

    Adegboyega, G.A; Passari, L; Butturi, M.A; Poggi, A; Suzi, E. (Journal de Physique III, 1996-12)
    The electrical activity of silver as well as its annealing properties in 10 Omega cm p-type Fz silicon substrate are studied by means of the four-point probe and minority carrier lifetime measurements. Silver atom concentration ...
  • Deep level transient spectroscopy study of the damage induced in n-type silicon by a gate oxide etching in a CHF3/Ar plasma 

    Adegboyega, G.; Perez, I.V; Poggi, Antonella; Susi, E (Journal of vacuum science & technology B, 1997-06)
    Deep level transient spectroscopy was used to detect the presence of deep levels correlated to the defects induced in the Si substrate by a CHF <sub> 3 </sub> /Ar dry etch of a 550 Å gate oxide as a function of the rf ...
  • Optical properties of evaporated PbSnS3 thin films 

    Kuku, T.A; Azi, Samuel (Kluwer Academic Publishers, 1998-06)
    PbSnS3 is a ternary sulfide semiconductor material which has been relatively little studied in the literature. Thin films of this material were deposited on glass substrates by a thermal evaporation process and their optical ...
  • Optical characterization of pyrolytically deposited ZnxCd1−xS thin films 

    Adedeji, A.U; Ojo, I.A.O; Djebah, A ( Optical Materials, 1998-09)
    The precursor bis-(morpholinodithioato-s,s′)–Cd–Zn was prepared and the thin films of ZnxCd1−xS deposited on sodalime glass substrate. A direct optical energy gap of 2.63 eV was obtained from the analysis of the absorption ...
  • Ion transport studies on vacuum deposited PbSnI 4 thin films 

    Kuku, T.A (Thin Solid Films, 1999)
    Thin films of the material PbSnI4 have been deposited by vacuum evaporation. The electrical conductivity, its activation energy and dielectric breakdown strength have been found to be film thickness dependent for films ...