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Now showing items 822-841 of 2034
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GA/MoM optimization of PIFA antennas with meandering slits
(IET Digital Library, 2007-11-16)The optimization of a mobile antenna by genetic algorithm (GA) can be done in many ways, e.g. by random removal of rectangles on the patch radiator, movement of shorting patches, etc. In this paper we will demonstrate the ... -
Gain improvement of the Yagi-Uda Antenna Using Genetic Algorithm for Application in DVB-T2 Television Signal Reception in Tanzania
(Journal of Interdisciplinary Sciences, 2017-11-02)A Yagi-Uda Antenna, commonly known simply as a Yagi antenna or Yagi, is a directional antenna system consisting of an array of dipole and additional closely coupled parasitic elements (usually a reflector and one or more ... -
Gaseous complex hydrides NaMH and NaMH (M = B, Al) as hydrogen storage materials: a quantum chemical study.
(Springer Nature Switzerland AG., 2020-12-17)Metal hydrides are feasible for energy storage applications as they are able to decompose with hydrogen gas release. In this work, gaseous complex sodium hydrides, NaMH and NaMH (M = B or Al), have been investigated using ... -
Gender and mechanization: Exploring the sustainability of mechanized forage chopping in Tanzania
(Elsevier Ltd., 2018-11)Mechanization is currently experiencing a revival in agricultural research and development, with a new emphasis on equity and sustainability. This study evaluates the introduction of forage chopper machines in seven villages ... -
Genetic Algorithm Optimization for Broadband Patch Antenna Design
(IEEE, 2007-10-15)A genetic algorithm (GA) optimization design of patch antenna has been performed using surface integral equation (SIE), method-of-moments (MoM) solution. The electromagnetic engine procedure is based on the Matlab code by ... -
Genetic algorithm optimization for multiband patch antenna design
(IEEE, 2008-08-01)A combined method of moment (MoM)/genetic algorithm (GA) numerical procedure for achieving mulitband-frequency characteristics in patch antenna design is demonstrated in this paper. Method of moment (MoM) solution used in ... -
Genetic characterization of jute mallow (corchorus spp.): a traditional African vegetable
(NM-AIST, 2017-12)Jute mallow (Corchorus spp.) is a very nutritious traditional leafy vegetable. Its leaves contain an average of 15% dry matter,4.8 g of protein, 259 mg of calcium, 4.5 mg of iron, 4.7 mg of vitamin A, 92 μg of folate, 1.5 ... -
Genetic diversity of grapevine (Vitis vinifera L.) from Tanzania as revealed by ISSR markers
(Journal of Advances in Agriculture, 2015-10-19)Grapevine (Vitis viniferaL.) is a perennial horticultural crop which is used worldwide for production of wine, table grapes, dried fruits and grape juice. In spite of its importance as a cash crop, the purity of each variety ... -
The genetic diversity of leaf vegetable jute mallow (Corchorus spp.): A review
(Indian Journal of Agricultural Research, 2017-09-27)Corchorus spp. is among traditional vegetable which is very nutritious and has been in use in many households in Africa. It contains high level of carotenoids (150μg/100g), vitamin C, Iron (190μg/g), 1.3% Calcium and 25.0% ... -
The genetic diversity of local african chickens: A potential for selection of chickens resistant to viral infections
(Poultry Science Association Inc., 2018)Viral infections impose a great threat to backyard chicken production among poor rural households in developing countries. These infections limit the contribution of chicken production in improving the livelihoods of ... -
Genetic variants of CYP3A5, CYP2D6, SULT1A1, UGT2B15 and tamoxifen response in postmenopausal patients with breast cancer
(Springer Nature, 2007-01-23)Introduction Tamoxifen therapy reduces the risk of recurrence and prolongs the survival of oestrogen-receptor-positive patients with breast cancer. Even if most patients benefit from tamoxifen, many breast tumours either ... -
Genome scan for signatures of adaptive evolution in wild African goat (capra nubiana)
(NM-AIST, 2021-08)Nubian ibex (Capra nubiana) is a wild goat species inhabiting the Sahara and Arabia deserts. C. nubiana thrives well in its habitat which is characterized by intense solar radiation, high temperatures, little feed, and ... -
Genome Scan for Variable Genes Involved in Environmental Adaptations of Nubian Ibex
(Springer Nature Switzerland AG., 2021-06-17)The Nubian ibex (Capra nubiana) is a wild goat species that inhabits the Sahara and Arabian deserts and is adapted to extreme ambient temperatures, intense solar radiation, and scarcity of food and water resources. To ... -
Genomics of Adaptations in Ungulates
(MDPI, 2021-05-29)Ungulates are a group of hoofed animals that have long interacted with humans as essential sources of food, labor, clothing, and transportation. These consist of domesticated, feral, and wild species raised in a wide range ... -
Genotype-Dependent Tumor Regression in Marek’s Disease Mediated at the Level of Tumor Immunity
(Springer, 2008-03-18)Marek’s disease (MD) of chickens is a unique natural model of Hodgkin’s and Non Hodgkin’s lymphomas in which the neoplastically-transformed cells over-express CD30 (CD30hi) antigen. All chicken genotypes can be infected ... -
Geochemical Distribution of Trace Elements in Groundwater from the North Mara Large-Scale Gold Mining Area of Tanzania
(Ground Water Monitoring and Remediation, 2016-05)The infl uence of large-scale mining operations on groundwater quality was investigated in this study. Trace element concentrations in groundwater samples from the North Mara mining area of northern Tanzania were analyzed. ... -
Geographical and behavioral risks associated with Schistosoma haematobium infection in an area of complex transmission
(Parasites & Vectors, 2018)Background: Schistosoma haematobium infection in endemic areas varies depending on the nature and complexity of the transmission networks present. Studies of micro-geographical transmission of S. haematobium infection ... -
Geological and hydro-geochemical assessment of fluorine around mount Meru, northern Tanzania
(NM-AIST, 2020-03)Areas around Mt. Meru are among the areas in Tanzania where climate change, population growth and high fluoride levels in much of the water sources lower availability of water for domestic ... -
Geometrical Structure, Vibrational Spectra and Thermodynamic Properties of Chitosan Constituents by DFT Method
(Science Publishing Group, 2014-08-10)The interaction between glucosamine molecules has been studied theoretically. The geometrical structures of monomer (A), dimer (AA) and trimer (AAA) molecules of glucosamine were optimized and vibrational spectra were ... -
Germination of Invasive Plant Seeds after Digestion by Horses in California
(Natural Areas Journal, 2008-10)Using a unique sterile design intended to eliminate outside seed contamination of horse feces, we investigated whether weed seeds germinate after digestion by horses. Feces were collected from selected National Parks and ...
