Research Papers/Topics in Physics

Stratified Saturated Control of Bacteria Migration in Porous Media: An Experimental Investigation

ABSTRACT The importance of sand bed filters has gained more ground in on- site water treatment facilities. The performance of which depends on the design of the sand bed. A laboratory column experiment was designed to quantitatively determine the best kind of sand layered arrangement for maximal bacteria attenuation. Porosity was taken as media parameter to further examine the relationship between the layers that will yield a better performance. Porosity was determined using volumet...

THE EFFECT OF LINE CONFIGURATION ON LIGHTNING-INDUCED VOLTAGES ON OVERHEAD CONDUCTING LINES

ABSTRACT Lightning-Induced Voltages (LIV) affect all electrical conductors and could damage electronic circuits and gadgets even without applied voltage. Several factors, including electrical power line configuration, can affect the magnitude of the lightning-induced voltages. Previous research paid less attention to the effect of line configuration on lightning-induced voltages on overhead power lines and other lines in the tropical environment. The effect of line configuration of elec...

A Computation Of Laminar Now in Open Channels and its Application to Sheet Erosion

ABSTRACT The results of an investigation of open channel flow in the laminar and transition range are presented. This type of flow found its application in runoff from rainfall. Values of Reynolds number were determined for different slopes in the range 10≤ 0≤ 450. It was found that the velocity of the fluid increases ar the slope of the bottom surface increases. There was a point where the laminar flow range change drastically to transitional flow range and later turbulent.

Determination Of Predator Ultrasound Parameters And Acoustic Startle Response In The African Female Anopheles Gambiae S.S.

ABSTRACT The female Anopheles gambiae, a malaria vector, detects ultrasound by its antenna, which can initiate an attractive or repulsive response. Modern electronic mosquito repellent devices exploit this concept in attempt to control malaria. However, they have shown only 20 % effectiveness in repellency. This work determines the transmission parameters of Amolops tormotus, Coleura afra sounds and their combination and hence their startling effects on female Anopheles gambiae. The sou...

Geophysical Investigation Of Faults And Fractures In Kiamunyi Area South West Of Menengai Volcano In The Kenya Rift

ABSTRACT The rapidly growing Nakuru town needs expansion to accommodate the increasing population. This vast expansion can only be done at the outskirts of the town. However, no single research has been done with the aim of checking the geological stability of the regions around Nakuru town; either by mapping new fault zones or by confirming using geophysical methods the presence of faults shown on geological maps. Kiamunyi estate being in the outskirts of the town was therefore chosen ...

Geophysical Investigation of Foundation Condition of A Site in Ikere- Ekiti, Ekiti State, South-Western Nigeria

Abstract: A geophysical investigation has been performed using Vertical Electrical Sounding (VES) at a site behind Sammy Guest House in Ikere-Ekiti, Ekiti-State to examine the geophysical parameters that can be used to evaluate the structural competence of the shallow section of the subsurface for construction purposes and building development. The schlumberger configuration was used for the data acquisition. The half- currents electrode (AB/2) was used and the quantitative interpre...

Tensile And Viscoelastic Characterization Of Kenyan Indigenous Boran Cow Hide Dermis

ABSTRACTThe wide range of applications, the industrial processing techniques and storage of collagenous materials expose them to a variety of environmental conditions such as temperature, humidity and solar ultraviolet (UV) radiations. In this study, a freshly flayed hide from a mature Boran bovine was prepared to pickling stage using conventional tanning processes. The hide was then cut into two halves along the backbone. One half was left at pickled stage while the other half was tanned usi...

Estimation of Indoor Radon from Concrete Blocks Used In Construction of Wall in Typical Nigerian Dwellings

ABSTRACT Radon gas is the most important source of natural radiation. Indoor radon concentration is the main path of human exposure to high radon concentration. Radon contribution from concrete block walls of typical Nigerian dwellings has been estimated from gamma ray spectroscopy measurements of radium concentration using generic equation. The radon concentrations varied from 11.27 Bq m-3 for a dwelling of dimensions 4.8 m × 4.8 m and 18.52 Bq m-3 for a dwelling of 3.6 m × 3.6 m...

Interpretation Of Aeromagnetic Data Around Nsukka Area, Southeastern Nigeria.

ABSTRACTThe Nsukka area is a sedimentary basin within the Anambra basin which is part of the lowerBenue trough. The Nsukka sheet (covering the aeromagnetic data of Nsukka) lies betweenlatitudes 6030΄ and 7000ʹNorth and longitudes 7000ʹ and 7030ʹEast. The IGRF correctedaeromagnetic data ofNsukka sheet, southeastern Nigeria has been interpreted using thestandard Euler deconvolution, source parameter imaging,forward and inverse modellingmethods with the objectives of determining the d...

Early And Rapid Detection Of Human Immunodeficiency Virus In Blood Using Raman Spectroscopy

ABSTRACTDeaths due to Human Immunodeficiency Virus (HIV) related diseases are still very high, especially in Africa. This is mainly attributed to poor diagnosis and late detection of the virus at times when the virus has greatly multiplied within the human body. In an attempt to come up with early detection mechanisms of the virus, several investigations have been carried out. The current detection mechanisms are less rapid with some being. Here we report on the potential of Raman spectroscop...

The Effects Of Temperature Variation, Pressure, And Bends On The Quality Of The Output Signal Generated By Continuous Wave (Cw) Laser In Single Mode Optical Fiber

ABSTRACTInformation signals need to be transmitted fast, efficiently and accurately. Optical fiber cablesare the transmission medium used in optical fiber communications. Optical fiber communicationhas exhibited many advantages over other means of communication. However, natural andphysical environment within the vicinity where the cable is installed poses a great challenge tosignal transmission. The effect of bends on the quality of the output signal generated by acontinuous wave (CW) l...

Analysis Of Glitch Activity In Rotating Neutron Stars

ABSTRACTA total of 660 discrete jumps in the rotation frequency (ı) and the spin-down rate (ıı) ofabout 140 pulsars were studied. Out of the 660 discrete jumps, 394 were classical glitches(the so-called macroglitches) and 266 were microglitches. The objects are grouped intonormal radio pulsars, anomalous x-ray pulsars and recycled millisecond pulsars. A bimodaldistribution was observed in many of the pulsar glitch parameters, namely the discreteabsolute fractional jumps in the rotat...

Investigation Of Humidity And Temperature Effects On The Accelerated Photodegradation Of Polyethylene Flimsies Using Dma

ABSTRACT Polyethylene (PE) is a polymer of ethylene (ethene) used in the manufacture of packaging bags. The considerable growth in use is due to the beneficial properties it has over other alternatives. These include, extreme versatility, it is light, extreme durability, resistance to chemicals, water and impact, good hygiene properties for food packaging, excellent thermal and electrical insulation properties and relatively inexpensive. However PE disposal is a challenge, resulting in ...

Gravity Modeling Of The Paka Geothermal Prospect In Baringo County, Northern Kenya Rift

ABSTRACTPaka volcano is situated in active northern Kenya rift. It is considered one of the geothermal prospects. It has been covered by most studies that focused on the regional tectonic evolution of the East Africa Rift, lithospheric and crustal structural analysis. However, regional analysis overlooked local analysis, where key geothermal structural features like thin massive intrusive and shallow faults that are significant have remained relatively poorly constrained. Hence, the key conce...


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