Browsing School of Biological, Physical, Mathematics & Actuarial Sciences by Title
Now showing items 177-196 of 246
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On numerical ranges of convexoid operators
(G.I publications, 2017-02)Numerical range is useful in studying operators on Hilbert spaces. In particular, the geometrical properties of numerical range often provide useful information about algebraic and analytic properties of an operator. The ... -
On Tensor Products and Elementary Operators
(Core, 2018)In this paper we describe operator systems and elementary operators via tensor products. We also discuss norms of elementary operators. -
On the Effects of Motocycle Accidents and its Trends (A Case of Kenya)
(JKUAT press, 2016)This study analyzes recent data of accidents’ prevalence in Kenya and investigates whether there might be new trends in areas formerly not prone to accidents. Polynomials of order 6 are found best suited for accidents’ ... -
On the similarities in properties of essential numerical range and Davis-Wielandt shell of Hilbert space operators
(International Journal of Innovative Research and Advanced Studies (IJIRAS), 2017-07)Let be an operator on an infinite dimensional Hilbert space . Denote the essential numerical range of the operator by and the Davis-Wielandt shell of the operator by . We review the properties of the essential numerical ... -
On the structures of quotient groups
(Academic Publications, 5/22/2009)Let J be the Jacobson radical of a commutative completely primary finite ring R such that J k 6= (0) and J k+1 = (0). Then R/J ∼= GF(p r ), the finite field of p r elements, and the characteristic of R is p k where k ≥ 2 ... -
Operators with slowly growing resolvents towards the spectrum
(Academic Publications, 1/13/2009)A closed densely defined operator H, on a Banach space X, whose spectrum is contained in R and satisfies (z −H)−1 ≤ c hziα |=z|β ∀ z 6∈ R (0.1) for some α , β ≥ 0; c > 0, is said to be of (α, β)−type R . If instead of (0.1) ... -
Optimal Allocation in Double Sampling for Stratification in the Presence of Nonresponse and Measurement Errors
(International Journal of Statistics and Applied Mathematics, 2019)The present study addresses the problem of minimum cost and precision in the estimation of the population mean in the presence of nonresponse and measurement errors. It is assumed that both the survey variable and the ... -
Optimal Allocation in Small Area Mean Estimation Using Stratified Sampling in the Presence of Non-Response
(International Journal of Statistical Distributions and Applications, 3/12/2021)Sample survey provides reliable current statistics for large areas or sub-population (domains) with large sample sizes. There is a growing demand for reliable small area statistics, however, the sample sizes are too small ... -
Overcoming the Challenges of Estimating Water Use in Temperate, Mixed Deciduous Forest of S. Korea
(American Geophysical Union, 2009)About 80% of forests in Korea occur in mountainous regions and are composed of a rich diversity of mixed deciduous tree species. Mountains in this region receive more rainfall and act as fountains that supply fresh water ... -
Patterns of CO2 exchange and productivity of the herbaceous vegetation and trees in a humid savanna in western Kenya
(Springer Science+Business Media Dordrecht, 2015)Factors governing the dynamics between woody and herbaceous vegetation in the savanna are of ecological interest since they determine ecosystem productivity and stability. Field measurements were conducted in a humid savanna ... -
Performance Evaluation Criteria of Credit Scoring Models for Commercial Lenders
(International Journal of Mathematics Trends and Technology, 2019-07)Credit scoring has been regarded as a main tool of different companies or banks during the last few decades and has been widely investigated in different areas, such as finance and accounting. Different scoring techniques ... -
Persistence and loss of cultural values of Tiriki Sacred Groves in Hamisi District, Kenya: Implications for management (RH: cultural values of Tiriki Sacred Groves)
(Taylor & Francis Online, 2017-10-24)Negligence and desecration observed among Tiriki sacred groves during causal visits by the authors in January 2007 was associated with their loss of cultural values and protection among local people. Household interviews ... -
Persistent Low Level Viraemia in Antiretroviral Treated Patients: Associated Factors and Virologic Outcome among HIV-1 Infected Patients at Nyakach County Hospital
(Global Scientific Journals, 2022-02)Antiretroviral treatment (ART) assists patients in controlling their HIV infection and ensuring long-term survival. Despite this advantage, a significant number of HIV-positive individuals do not attain full virologic ... -
Preparation, characterization, and optimization of primaquine-loaded solid lipid nanoparticles
(PMC, 2014-08-11)Primaquine (PQ) is one of the most widely used antimalarial drugs and is the only available drug that combats the relapsing form of malaria. PQ use in higher doses is limited by severe tissue toxicity including hematological- ... -
Preparation, characterization, and optimization of primaquine-loaded solid lipid nanoparticles
(International Journal of nanomedicine, 2014-08-11)Primaquine (PQ) is one of the most widely used antimalarial drugs and is the only available drug that combats the relapsing form of malaria. PQ use in higher doses is limited by severe tissue toxicity including hematological- ... -
Probability of Default Estimation for Commercial Lenders in Developing Economies: Creditworthiness of Consumer Borrower
(Global Scientific Journals, 2019-06)The Business of advancing credits is gradually becoming a major target for many banks, as a result there is high competition among the financial institutions leading to default of most credits. In order to raise the quality ... -
Properties of Spectrally Bounded Compact Elementary Operators
(DOI: 10.47443/cm.2021.0012, 2021-03-31)Spectrally bounded compact elementary operators on dense irreducible subalgebras of C ∗ -algebras are characterized. Also, it is shown that left multiplications, right multiplications, generalized derivations and basic ... -
A prospective observational description of frequency and timing of antenatal care attendance and coverage of selected interventions from sites in Argentina, Guatemala, India, Kenya, Pakistan and Zambia
(BMC, 2015)The Global Network for Women’s and Children’s Health Research is one of the largest international networks for testing and generating evidence-based recommendations for improvement of maternal-child health in resource-limited ... -
Qtl Mapping for Salt Tolerance in an Intra-Specific Upland Cotton at Seedling Stage Using Ssr Markers
(ESci Journals, 2017)Cotton is a moderately salt-tolerant crop, but its salt tolerance threshold is not more than 7.7 ds•m−1. The seedling stage of cotton is the highly sensitive to salinity and the effects can be quantified by measuring ... -
QTL mapping of fiber quality and yield-related traits in an intra-specific upland cotton using genotype by sequencing (gbs)
(International Journal Molecular Science, 2018-02)Fiber quality and yield improvement are crucial for cotton domestication and breeding. With the transformation in spinning techniques and multiplicity needs, the development of cotton fiber quality and yield is of great ...