Natural & Applied Sciences

Natural & Applied Sciences Research Papers/Topics

Kifilideen’s Rule: A Groundbreaking Approach to Solving Product Index Nonlinear Simultaneous Equations with Two, Three, Four, and 𝒏 Variables

Many real-world and social problems give rise to product index nonlinear simultaneous equations, which traditional solution methods, whether direct or iterative, fail to solve effectively. These equations appear in diverse fields, necessitating a specialized approach to ensure accurate and efficient solutions. Existing methods for solving linear simultaneous equations are insufficient for addressing product index nonlinear simultaneous equations. Given their frequent occurrence in practica...

Enhancing Dermatological Diagnosis through Machine Learning: A Multi-Class Skin Disease Detection System with Convolutional Neural Network.

This research paper proposes a novel approach to detecting skin diseases using machine learning techniques. The proposed system utilizes image processing techniques to extract features from skin lesion images and then applies machine learning algorithms to classify the lesion into different categories. The proposed system can be evaluated using a large dataset of skin lesion images and the machine can learn itself based on the provided data and achieve high accuracy in detecting various skin ...

COMPARATIVE ANALYSIS OF TURN-AROUND TIME AMONG SELECTED SEAPORTS IN WEST AFRICAN SUB-REGION

Turnaround time of a vessel in a seaport exhibits the capability and ability of a port in providing efficient and effective services. Ship turnaround time is one of the most significant Port performance indicator. This is the total time, spent by the vessel in port, during a given call. It is the sum of waiting time, berthing time, service time (i.e., ship’s time at berth) and sailing delay. West African ports play a crucial role in trade and economy, as 95% of merchandise trade is handled ...

A Duo 4-Plex Real Time PCR for Detection of Eight Tick-Borne Zoonoses in Kenya

Abstract/Overview Ticks harbor multiple pathogens, most of which can be transmitted to hu mans. The ensuing zoonoses display non-specific symptoms that make defin itive diagnosis difficult. We report here the development and evaluation of multiplex real time polymerase chain reaction (qPCR) assays for eight tick-borne zoonoses (TBZ). The assays were organized in duo formats of 4-plex each. Format 1 was optimized for Anaplasma phagocytophilum, Coxiella burnetii, Borrelia burgdoferi and Ehr...

Norm Inequalities for positive elementary operators and entanglement of states

Abstract/Overview We present norm inequalities for positive elementary operators via Cauchy-Schwarz inequality and Minkowskis inequality techniques. Norm inequalities are presented in Euclidean algebras linked to Minkowski’s light cones. Lastly, we explore the applications in quantum theory particularly in entanglement of states.

Projective Norms and Convergence of Norm-Attainable Operators

Abstract/Overview Let H be an infinite dimensional complex Hilbert space and B(H) the algebra of all bounded linear operators on H. We establish norm-attainability of operators via projective tensor norm. Moreover, we give results on the convergence of norm-attainable operators.

Modeling the Impact of Traveling Time on the Utilization of Maternity Services Using Routine Health Facility Data in Siaya County, Western Kenya

Abstract/Overview In Kenya, no studies have attempted to use routine health facility data disaggregated by level of care, to find out if there is a significant statistical relationship between physical accessibility and utilization of maternity services at the ward administrative level. A cross-sectional study design used publicly available geospatial data in combination with routine data from the web-based district health information software (DHIS2) platform. Access Mod (version 5.2.6) ...

Microbial infections in the twenty first century: a continuous challenge

Abstract/Overview Ever since the first case report of HIV infection approximately twenty years ago, enormous human and material resources have been put in place to assist in the control and management of the scourge. With an increase in number of cases of immunosuppression came an increase in the number of microbial organisms, which were previously unknown. Some, which have existed albeit at an equilibrium with the human immune system and by extension the body’s defence mechanism have f...

Evaluation of three rapid diagnostic test kits in the diagnosis of plasmodium species infections among primary school children in Baringo County, Kenya

Abstract/Overview Background: Due to the difficulty in implementing microscopy-based definitive diagnosis of malaria especially in resource-poor areas, rapid diagnostic test (RDT) kits as alternatives have been developed by different companies. Kits from different companies may differ in sensitivity and specificity. It is therefore imperative to conduct field evaluation of kits from different manufacturers before they are recommended for widespread use in diagnosis of malaria. The present...

Modeling of liver cancer risk factors and dynamics at community level

Abstract/Overview Hepatocellular carcinoma (HCC) is a malignant cancer of the liver arising from uncontrolled multiplication of the abnormal liver cells. It is an ignored public health condition where patients come late to the hospital at terminal stages. Its development is proceeded by liver inflammation arising from the risk factors of HCC affecting the liver. HCC is one of the few cancers with both infectious and non-infectious causes. The common causes range from infections with viral...

Evolution of the primate trypanolytic factor APOL1

Abstract/Overview ApolipoproteinL1 (APOL1) protects humans and some primates against several African trypanosomes. APOL1 genetic variants strongly associated with kidney disease in African Americans have additional trypanolytic activity against Trypanosoma brucei rhodesiense, the cause of acute African sleeping sickness. We combined genetic, physiological, and biochemical studies to explore coevolution between the APOL1 gene and trypanosomes. We analyzed the APOL1 sequence in modern and a...

Technical efficiency in public hospitals in Kenya: a two –stage data envelopment analysis

Abstract/Overview The paper uses the DEA technique to estimate efficiency scores in Kenyan public hospitals and then applies the Tobit regression to study inter-hospital variation in the scores. The DEA analysis reveals that small hospitals are more efficient than large hospitals, with efficiency levels ranging from 74-91% in small DMUs and from 57-78% in large DMUs. Tobit regression analysis shows efficiency scores are negatively correlated with the hospital’s distance from the manager...

Mathematical modelling of liver cancer in Western Kenya

Abstract/Overview Liver cancer, also known as hepatocellular carcinoma (HCC) is a primary cancer of the liver and the fifth cause of mortality world-wide. It is a global public health problem which is poorly addressed in the developing countries. Data on prevalence and incidence is scanty leading to inability to predict the burden of HCC in the developing world and this leads to poor policy framework for management and control of HCC. More-over, management and control of HCC is poorly add...

Activated Charcoal Modified with Chromium Oxide as Catalyst for Groundnut Oil Transesterification

Abstract  A gradual shift to biofuels development was considered advantageous in reducing the pollution and other challenges associated with fossil fuels. Specifically, biodiesel production is one of those options prioritized in the literature. Herein, we demonstrated how a modified activated charcoal sample and chromium oxide can catalyze the upgrading of groundnut oil into fuel-grade biodiesel at the laboratory scale via trans-esterification with methanol. The charcoal-based catalyst was ...

Mathematical Modelling of the COVID-19 Pandemic with Demographic Effects

Abstract/Overview In this paper, a latent infection susceptible–exposed–infectious–recovered model with demographic efects is used to understand the dynamics of the COVID-19 pandemics. We calculate the basic reproduction number (R0) by solving the diferential equations of the model and also using next-generation matrix method. We also prove the global stability of the model using the Lyapunov method. We showed that when the R0 < 1 or R0 ≤ 1 and R0 > 1 or R0 ≥ 1 the disease-free ...


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