Quantum theory of damped harmonic oscillator

The exact solutions of the Schrödinger equation for damped harmonic oscillator with pulsating mass and modified Caldirola-Kanai Hamiltonian are evaluated. We also investigated the case of under-damped for the twomodels constructed and the results obtained in both cases do not violate Heisenberg uncertainty principle

Investigation of Raphia hookeri trunk as a potential ceiling material for passively cooled building design

No Abstract Available Ghana J. Sci, Vol.43 2003: 3-

Excitation of low-frequency electrostatic instability on the auroral field lines due to precipitation electron beam

Low-Frequency Electrostatic Instability That Is Observed By Both Ground Facilities And Satellites Have Been Studied In The Auroral Acceleration Region Consisting Of Hot Precipitating Electron Beam From The Magnetosphere, Cold Background Electron And Ion Beam Moving Upward Away From The Earth Along The Auroral Field Lines. The Model Distribution For Both The Electron And Ion Are Taken, As Drifting Maxwellians While The Cool Background Electron Is Maxwellian. The Excited Mode And Growth Rate For The Resonant Instability Driven By The Precipitating Electron Beams Are Derived. We Also Discuss The Growth Rate And The Real Frequency Of The Resonant Instability. It Is Also Shown That, The Precipitating Electrons Can Generate Low-Frequency Electric Field Fluctuations (Lefs) Within The Frequency Range 55.4Hz To About 174.7Hz. Journal of the Nigerian Association of Mathematical Physics Vol. 10 2006: pp. 607-61

Collisional kinetic energy dissipation in the suparauroral ionosphere for drifting Maxwellians

No Abstract. Global Journal of Pure and Applied Sciences Vol. 12(3) 2006: 429-43

Investigation Of Thermal Properties Of Naturally Seasoned Dry Macaranga Barteri Timber Board

Steady-state thermal conductivity measurements of naturally seasoned African thorn tree (Macaranga barteri) timer boards were carried out. Other thermal and physical properties such as specific heat capacity, thermal resistivity, density, thermal absorptivity and diffusivity as well as percentage of dead air space (v/v) were also determined for the wood samples. The results showed that Macaranga barteri timber board, naturally seasoned to dryness has thermal conductivity of 0.0692±0.0061 Wm-1K-1 mean specific heat capacity value of 1898.389±19.831JKg- 1K-1, thermal absorptivity and diffusivity values of 18.4226±1.3332m-1 and (1.0731±0.1560) x 10-7m2s-1 respectively. It has a bulk density of 339.82±15.49Kgm-3 and particle density of 413.53±28.18 with 17.82±1.81% as mean percentage volume of dead air space. These results are comparable with those of the conventional insulators, hence the wood material is a potential thermal insulator for building design

Langmuir Wave Instability And Photoelectron Emission In Irradiated Dusty Plasmas

We have investigated dust charged fluctuation due to the combined effect of Langmuir Wave and Photoelectron Emission in Irradiated Dusty Plasma. The dispersion relation and growth of the Langmuir wave instability is also presented. The applicability of the developed dispersion relation and growth rate of the Langmuir wave instability is analysed graphically.Keyword: Langmuir Wave, Photoelectron Emission, Irradiated Dusty Plasm

Global solar radiation distribution and utilization seasons at Ilorin, Nigeria

No Abstract.Nigerian Journal of Physics Vol. 20 (1) 2008: pp.92-10

Percentage absorbance and transmittance of various types of glasses

Studies have been made on the Percentage Absorbance and Transmittance of various types of glasses in the Ultra-Violet (UV) and Visible (Vis.) Spectrum (between the wavelength range of 200nm and 800nm). The 6mm thick plain louvre glass absorbed more than other plain louvre glasses with smaller thickness. The same results were obtained for coloured glasses. The coloured glasses absorb less in their respective colour range and hence transmit more in such range. Hence, it is recommended that thick coloured and 6mm plain louvre glasses should be used to reduce the load on the air-conditioners inside buildings, while plain louvre glass of smaller thickness be used as glazing material in flat plate solar collectors and possibly in long term storage elements. KEY WORDS: Absorbance, Transmittance, Glass. Global Jnl Pure & Applied Sciences Vol.10(2) 2004: 327-33

Investigation of Musanga cecropioides heartwood as a thermal insulator for refrigerators, coolers and food flask

No Abstract Available Ghana J. Sci, Vol.42 2002: 71-7

Comparison Of Diffuse Solar Radiation Models Using Data For Onne, Nigeria

Measurements of global solar radiation and sunshine duration data during the period from 1984 to 1999 were supplied by IITA (International Institute of Tropical Agriculture) at Onne. The data were used to establish empirical relationships that would connect the daily monthly average diffuse irradiation with both relative sunshine duration and clearness index separately and in combination. The estimated results were then compared with measured values of a nearby location since measured data on diffuse radiation for this location is not available. The correlation connecting diffuse radiation with percentage possible sunshine is found to be applicable over Onne. Keywords: Diffuse, solar radiation, Onne.Global Journal or Pure and Applied Sciences Vol. 14 (4) 2008: pp. 473-47