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Found (569) publications

One-minute rain rate distribution in Nigeria derived from TRMM

T.V. Omotosho, C.O. Oluwafemi (2009)
Data from the Tropical Rainfall Measuring Mission (TRMM) satellite sensors, the Microwave Imager (TMI, 3A12 V6) and other satellite sources (3B43 V6) have been used to derive the thunderstorm ratio b, total rain accumulation M, and 1-min rainfall rates, R1min, for 37 stations in Nigeria, for 0.001–1% of an average year, for the period 1998–2006. Results of the rain accumulations from the TRM...
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Impairment of radio wave signal by rainfall on fixed satellite service on earth–space path at 37 stations in Nigeria

T.V. Omotosho, C.O. Oluwafemi(2009)
This study investigates the effect of rainfall on horizontally polarized radio waves for fixed satellite service at Ku, Ka and V bands for links to the recently launched Nigeria Communication Satellite one (NigComSat-1), for annual time availabilities of 99–99.99% in an average year for 37 stations in Nigeria. The results obtained at Ku-band downlink shows that 99.99% availability is possibl...
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Solar Activity and Total Ozone variation in Lagos

A.B Rabiu and T.V Omotosho (2003)
Impacts of solar activity on the total column ozone variation within an interval of four years (1993-1997) have been investigated at an equatorial station of Lagos (06°33' N, 03°21' E) Nigeria. The linear regression analysis shows a significant negative correlation between mean total column ozone and solar activity both at monthly level (r = -0.0652, r2 = 0.0043) and annual level (r = -0.2671,...
http://ajol.info/index.php/njpap/article/view/21433
 
 

Study of Cloud Impact on Fixed Satellite Communication Link at Ku, Ka and V Bands in Nigeria

T.V. Omotosho, E.B. Babatunde (2010)
The study investigates the effect of clouds on fixed satellite communication link on earthspace path in Nigeria for 0.01 to 10% unavailability of an average year. The input data (from August 2002 to July 2009) used for the study are base on recent meteorological data measured from space by the Atmospheric Infrared Sounder satellites (AIRS). The International Telecommunication Union Radio Pr...
http://www.insipub.com/ajbas_August_2010.html Download 580.38 kB
 
 

Rain-induced cross-polarization effects o satellite telecommunication in some tropical locations

T.V Omotosho and M.O Ajewole (2005)
Rain- induced cross polarization is an important factor in the design of dual-polarization microwave radio communication systems. In this work we present the scattering effect of oblate spheroidal raindrops on Earth-space wave communication in the frequency band 1–52 GHz in three tropical locations: Ile-Ife, Nigeria (4.340E, 7.330N), Douala, Cameroon (9.700E, 4.050N), and Nairobi, Kenya (36.750...
http://ajol.info/index.php/njphy/article/view/38047
 
 

SIGNATURE OF ATMOSPHERIC DYNAMICS ON SURFACE OZONE VARIABILITY IN NIGERIA

Akinyemi M L and T V Omotosho (2010)
An examination of analysis revealed that surface ozone concentration over Nigeria varied with direction of the local trade winds, namely the Harmatan, and the Gulf of Guinea maritime trade winds. In DJF and MAM the period of the dry dusty Harmatan seasons, surface ozone concentration in the southern Nigeria exceeded that of the north by 21DU and 24DU respectively. Whereas in the JJA and SON,...
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BOOK PUBLICATION (2010): Studies of Propagation Impairments on Earth Space Path For Fixed Satellite links at Microwave Frequencies in Nigeria. ISBN:978-3-8433-7131-5 LAP LAMBERT Academic publishing GmbH & Co.KG and licensors

TEMIDAYO VICTOR OMOTOSHO
Radio wave propagating between and earth-space links are adversely affected by atmospheric gases, rain, clouds,and tropospheric scintillation. The problems become more acute for countries located in the tropical regions. The effects of the troposphere on microwave signals due to high rain intensities lead to severe signal attenuation and outage.The objective of this work is to estimate p...
http://www.lap-publishing.com
 
 

Cases on Successful E-Learning Practices in the Developed and Developing World: Methods for the Global Information Economy Bolanle Olaniran Texas Tech

A. A. Azeta, C. K. Ayo, A. A. Atayero, N. A. Ikhu-Omoregbe
This chapter examines the learning environment of visually impaired students in the school for the blind. The level of Information and Communication Technology (ICT) utilization and adoption is reported with specific interest in VoiceXML and its application areas. As a case study, a prototype voice-based e-Learning application for course registration and examination was developed and reporte...
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Formal modelling and design of mobile prescription applications

Nicholas Ikhu-Omoregbe
Adverse drug effects are a major cause of death in the world with tens of thousand deaths occurring each year because of medication or prescription errors. Many errors involve the prescription or administration of the wrong drug or dosage by care givers to patients due to illegible handwriting, dosage mistakes, confusing drug names. With the use of mobile devices such as personal digital assist...
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A Voice-based Mobile Prescription Application for Healthcare Services (VBMOPA)

Ikhu-Omoregbe N. A., Azeta A. A.
Adverse drug effects are a major cause of death in the world with tens of thousand deaths occurring across the world each year because of medication or prescription errors. Many of such errors involve the administration of the wrong drug or dosage by care givers to patients due to indecipherable handwritings, drug interactions, confusing drug names etc. The adoption of voice-based mobil...
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