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Recent submissions

COLLEGE OF AGRICULTURAL & NATURAL SCIENCES: Recent submissions

Now showing items 61-80 of 1334

Scanning digital holography at 10.6μm for large scene reconstruction

Mensah, Philip; Locatelli, Massimiliano; Pugliese, Eugenio; Poggi, Pasquale; Bassuah, Paul K Buah; Meucci, Riccardo (University of Cape Coast, 2018-05-18)

We demonstrate amplitude reconstruction of a very large scene hologram recorded by means of digital holography at 10.6 microns. Infrared digital holography is characterized by a low vibration sensitivity and a large field ...
Removal of Pb 2+ and Fe2+from water samples in Ghana by synthetic zeolites as measured by atomic absorption spectroscopy and light transmission experiments

Sefa-Ntiri, B.; Kwakye-Awuah, B.; Mensah-Amoah, P.; Williams, C. (University of Cape Coast, 2015)

The removal efficiencies of laboratory-synthesized zeolite types LTA and LTX on lead and iron in water samples collected from rivers, streams, and wells from Central and Volta regions of Ghana were investigated. The ...
Rectification due to harmonic mixing of two coherent electromagnetic waves with commensurate frequencies in carbon nanotubes

Abukari, Sulemana S.; Adu, Kofi W.; Mensah, Samuel Y.; Mensah, Natalia G.; Rabiu, Musah; Twum, Anthony; Amekpewu, Mathew; Dompreh, Kwadwo A. (University of Cape Coast, 2013)

We report on a theoretical investigation of carbon nanotubes subjected to a pure alternating electric field consisting of two phase-shifted harmonic fields of frequencies ω1 = Ω and ω2 = 2Ω (harmonic mixing) without any ...
Recent trends in the daily rainfall regime in Southern West Africa

Nkrumah, Francis; Vischel, Théo; Panthou, Geremy; Klutse, Nana Ama Browne; Adukpo, David C.; Diedhiou, Arona (University of Cape Coast, 2019)

Extreme climate events, either being linked to dry spells or extreme precipitation, are of major concern in Africa, a region in which the economy and population are highly vulnerable to climate hazards. However, recent ...
Rapid laser direct writing of plasmonic components

Amoako, G.; Zhang, W.; Zhou, M.; Sackey, S. S.; Mensah-Amoah, P. (University of Cape Coast, 2017)

A new device named technology-plasmonics has recently emerged and can be used to manipulate light at the nanoscale level. Here, we report the method of two-photon photopolymerization for rapid laser direct writing of ...
Rainfall variability over Ghana: model versus rain gauge observation

Nkrumah, Francis; Klutse, Nana Ama Browne; Adukpo, David Cudjoe; Owusu, Kwadwo; Quagraine, Kwesi Akumenyi (University of Cape Coast, 2014)

This paper used the International Centre for Theoretical Physics (ICTP) Regional Climate Model, Version 3 (RegCM3) and rain gauge data selected from the Ghana Meteorological Agency (GMet) from 1990 to 2008 to investigate ...
Quantitative assessment of image quality in mammography: results from phantom studies in Ghana

Sosu, Edem; Boadu, Mary; Mensah, Samuel Yeboah (University of Cape Coast, 2017)

Quantitative image quality assessment have been undertaken on eight (A – H) mammography systems in Ghana to review the overall condition of mammography equipment with respect to image quality in order to suggest improvements ...
Quantitative pore characterization of polyurethane foam with cost-effective imaging tools and image analysis: a proof-of-principle study

Yunus, Shemmira; Sefa-Ntiri, Baah; Anderson, Benjamin; Kumi, Francis; Mensah-Amoah, Patrick; Sackey, Samuel Sonko (University of Cape Coast, 2019-11-14)

This study investigated the pore characterization of polyurethane (PU) foam as a necessary tep in water filtration membrane fabrication. Porous material characterization is essential for predicting membrane performance, ...
Quantitative epithermal neutron activation analysis of seven micro elements in breast milk of lactating mothers from the Central region of Ghana

Aboh, Irene Korkoi; Vowotor, Michael K.; Druye, Andrews Adjei (University of Cape Coast, 2020)

Background Epithermal instrumental neutron activation analysis (EINAA) technique is used for the determination and estimation of the concentration levels of micronutrients such as Sodium (Na), Magnesium (Mg), Potassium ...
Propagation of ultrasonic waves in bulk gallium nitride (gan) semiconductor in the presence of high-frequency electric field

Mensah, S.Y.; Mensah, N.G.; Elloh, V.W.; Banini, G.K.; Sam, Frederick; Allotey, F.K.A. (University of Cape Coast, 2005)

The propagation of ultrasound is studied in bulk GaN semiconductor in the presence of a strong, ac field oscillating at a frequency much higher than that of the ultrasound. Analytical expressions have been obtained for the ...
PROMSAR: A backward Monte Carlo spherical RTM for the analysis of DOAS remote sensing measurements

Palazzi, E.; Petritoli, A.; Giovanelli, G.; Kostadinov, I.; Bortoli, D.; Ravegnani, F.; Sackey, S.S. (University of Cape Coast, 2004)

A correct interpretation of diffuse solar radiation measurements made by Differential Optical Absorption Spectroscopy (DOAS) remote sensors require the use of radiative transfer models of the atmosphere. The simplest models ...
Prediction of organ and effective dose with known mas and kvp for dose optimisation protocol and recommendations in CT

Issahaku, Shirazu; Mensah, Y. B.; Schandorf, Cyril; Mensah, S. Y.; Sackey, Theophilus; Dery, Theresa Bebaaku; Pokoo-Aikins, Mark; Eduful, Ernest Kojo (University of Cape Coast, 2017)

In medical exposure dose to patients are determine by input parameters including mAs, kVp, pitch factor among other factors. The aim of this study is to provide procedure and protocol of how to assess patients’ dose (organ ...
Polarization instability shift in birefringent single mode optical fibers

Ishiekwene, G.C.; Mensah, S.Y.; Brown, C.S. (University of Cape Coast, 2000)

An intensity-dependent change in ellipticity of an input light beam leads to a characteristic shift in polarization instability. The presence of dichroism gives rise to self-induced ellipticity effect in the polarization ...
Photothermal Lens Spectrometry Measurements in Highly Turbid Media

Marcano, Aristides; Basaldua, Isaac; Villette, Aaron; Edziah, Raymond; Liu, Jinjie; Ziane, Omar; Melikechia, Noureddine (University of Cape Coast, 2013)

We measured the photothermal lens signal in samples exhibiting high turbidity using a pump-probe scheme. We show that the photothermal lens signal properties remain nearly unchanged up to values of turbidity of 6 cm1 despite ...
Photon-assisted process and high-harmonic dynamic localization in graphene nanoribbons

Musah, Rabiu (University of Cape Coast, 2012)

We used a complete tight-binding band structure of grapheme nanoribbon to obtain, for the first time, analytical techniques for observing photon assisted transport, and dynamic localization of electrons in the graphene ...
Photo-degradation of microbes in hand-dug well-water using different radiation sources

Sackey, S. S.; Mensah-Amoah, P.; Amoako, G.; Vowotor, M. K.; Sefa-Ntiri, B.; Birikorang, E. (University of Cape Coast, 2019)

Microbial bacteria in well-water have been treated using three different radiations and efficiency of treatment determined. The radiations were SUV (Sun with UV); SNoUV (Sun with NoUV, sun with UV portion filtered out) and ...
Performance evaluation of a deployed 4g Lte network

Tchao, E.T.; Gadze, J.D. (University of Cape Coast, 2018)

In Ghana and many countries within Sub-Sahara Africa, Long Term Evolution (LTE) is being considered for use within the sectors of Governance, Energy distribution and transmission, Transport, Education and Health. Subscribers ...
Opto-electronic system for displacement and vibration measurements

Francini, F.; Macchiarulo, M.; Tiribilli, B.; Buah-Bassuah, P. K. (University of Cape Coast, 1987)

A device capable of measuring small displacements ~nd vibrati~ns o~ a n:oving body is .presented. A small mirror, firmly attached to the object unde~ mv.eStlgatlOn, defiect~ a paIr ~~laser beams onto two distinct photodetectors. ...
Optical imaging method for determining symptoms severity of cassava mosaic disease

Anderson, Benjamin; Eghan, Moses Jojo; Asare-Bediako, Elvis; Buah-Bassuah, Paul Kingsley (University of Cape Coast, 2015-10-10)

Cassava mosaic disease (CMD) is a major constraint to cassava production in cassava growing regions. Severity of CMD symptoms on cassava leaves is usually assessed visually using an arbitrary scale, which is semi-qualitative, ...
Optical identification of plasmodium alciparum malarial byproduct for parasite density estimation

Opoku-Ansah, Jerry; Eghan, Moses Jojo; Anderson, Benjamin; Boampong, Johnson Nyarko; Edziah, Raymond; Adueming, Peter Osei-Wusu; Amuah, Charles Lloyd Yeboah (University of Cape Coast, 2019-11-11)

Plasmodium alciparum (P. alciparum) malarial degree of infection, termed as parasite density (PD), estimation is ital for point of-care diagnosis and treatment of the disease. In this work, we present application of optical ...

Now showing items 61-80 of 1334

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