Open Access Original Research Article

Sensitivity Analysis of Mathematical Model for Malaria Transmission with Saturated Incidence Rate

Mojeeb AL-Rahman EL-Nor Osman, Appiagyei Ebenezer, Nada Abdelsamad Hassan, Cuihong Yang

Journal of Scientific Research and Reports, Page 1-10
DOI: 10.9734/JSRR/2019/46131

Malaria is a life threatening vector borne disease caused by parasites that are transmitted to people through the bites of infected female Anopheles mosquitoes. In this paper, we study and analyze mathematical model of ordinary differential equations for human and mosquito with saturated incidence function. The stability of the system was analyzed for the Malaria-Free Equilibrium (MFE) through the reproduction number R0 which was obtained using the next generation matrix method. The MFE is locally asymptotical stable if R0 < 1 and unstable otherwise. Moreover, our sensitivity analysis shows that the most effective parameter is, a, mosquito biting rate and the less effective one is h, human progression rate. Our numerical simulations show that, reducing the biting rate of mosquitoes will reduce the number of exposed humans as well as infected individuals and increase the number of treated individuals. This can be achieved by increasing the proportion of antibodies.

Open Access Original Research Article

Rheological Properties of the Erythrocytes in Weakened Static Magnetic Field of the Earth In vitro Study

L. N. Katiukhin

Journal of Scientific Research and Reports, Page 1-12
DOI: 10.9734/jsrr/2019/v22i330088

Background: The magnetobiological effect of the weakened magnetic field of the Earth is of interest due to the consequences of the long stay of astronauts in space.
Objective: The rheological properties of erythrocytes in a weakened magnetic field of the Earth are investigated.
Methods: Osmotic gradient ektacytometry, aggregometry.

Results: A study of the rheological properties of erythrocytes of blood rats in vitro, exposed at a temperature of 0°C in a natural and weakened magnetic field of the Earth, was carried out. It is established that a weakened magnetic field leads to a decrease in the rate of hemolysis, the average body volume, transformation, and decrease in the specific surface of the erythrocyte, potentiates the weakening of the deformation and aggregation properties.

Conclusions: The results of the work should be taken into account not only to predict the rheological behavior of the blood system when the natural magnetic field is weakened but also to optimize the conditions for the long-term storage of donor blood.

Open Access Original Research Article

An Analysis of Managerial Challenges of Affiliated Credit Unions to Cameroon Cooperative Credit Union League (CamCCUL)

Neba Noela Buwah, Chofor Joyvice

Journal of Scientific Research and Reports, Page 1-8
DOI: 10.9734/jsrr/2019/v22i330089

Aim: This study seeks to analyse the managerial challenges that affiliated Credit Unions to Cameroon Cooperative Credit Union League (CamCCUL) are exposed to. The prevalence of Credit Unions with limited managerial capacities in most Cameroonian communities both in rural and urban areas invites corporate parenting from bigger support and supervisory organizations like CamCCUL. This parenting relationship between CamCCUL and her affiliates presumes superior managerial capabilities to affiliates which in most cases is a misplaced expectation. This is prompted by the fact that these institutions affect a multitude of lives both directly and indirectly. The Agency and Stakeholder theories served as foundation.

Study Design: The study adopted a survey and causal exploratory design with both qualitative and quantitative parameters. The focus of the researcher was to explore managerial challenges from the managers themselves and members of credit unions who are better placed to gauge the effectiveness of managerial actions in terms of the service they receive.

Place and Duration: This study was conducted between April 2016 and November 2018, involving 138 of the 210 Credit Unions operating mostly in the Northwest and Southwest regions of Cameroon.

Methodology: The major instrument for data collection was questionnaire and a pilot study of 50 copies was carried out across various Chapters of CamCCUL. With a population of 210, a stratified sample of 138 was obtained using the Taro Yamane Formula.The primary data was tested to be reliable with a 0.701 consistency coefficient using Cronbach alpha. The study employed Chi-Square as a tool of analysis to measure Credit Unions’ affiliation to CamCCUL and specific Managerial Challenges.

Findings: The findings revealed that affiliate Credit Unions to face numerous managerial challenges ranging from structural to resources deficiencies. The most alarming of these problems were the lack of autonomy to take managerial decisions and threats from CamCCUL supervisors.

Conclusion: The study concluded that CamCCUL as a league is not operating solely to achieve its mission and has rather kept its affiliated Credit Unions in a tight corner. The researchers recommended that the regulating authorities should render Credit Unions more autonomous where possible. Additionally, there should be well-structured and comprehensive governance policies for the management of all affiliated Credit Unions to comply with.

Open Access Original Research Article

Genetic Variability, Correlation and Path Coefficient Analysis in Advanced Generation of Brassica napus L.

Md. Nur-E-Nabi, Md. Ehsanul Haq, Montasir Ahmed, Md. Monir Hossain, Md. Shefat-al-Maruf, Firoz Mahmud, Shahanaz Parveen, Md. Harun-Ur-Rashid

Journal of Scientific Research and Reports, Page 1-12
DOI: 10.9734/jsrr/2019/v22i330090

The present study was conducted involving 62 F3 genotypes of Brassica napus L. at the experimental farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh to ponder the genetic variability, phenotypic, genotypic and environmental coefficient of variation, heritability and genetic advance, correlation, path coefficient and genetic diversity analysis in a randomized complete block design (RCBD) with sixty-two genotypes (treatments) with three replications during November 2014 to February 2015. The investigations aimed to select the best segregating genotypes for the yield improvement of Brussica napus (rapeseed). Analysis of variance indicated that the genotypes were found significantly different for all the characters considered. The relative phenotypic coefficient of variation (PCV) was higher than the genotypic coefficient of variation (GCV) for all the traits investigated. The high GCV value was observed for the number of siliqua per plant (NSP), plant height (PH), silique length (SL), number of seed per silique (NSS) and seed yield per plant (SYP) indicated high broad sense heritability. The significant positive correlation with seed yield per plant (SYP) was found in plant height (PH) (0.368**), the number of primary branches per plant (NPB) (0.332**), number of secondary branches per plant (NSB) (0.382**), number of silique per plant (NSP) (0.549**), and siliqua length (SL) (0.037**). The results of path coefficient analysis uncovered that plant height (PH) (0.582), days to 50% flowering (50F) (0.390), days to maturity (DM) (0.575), number of primary branches per plant (NPB) (0.678), number of secondary branches per plant (NSB) (0.182),and thousand seed weight (TSW) (0.289) had a positive direct impact on seed yield per plant (SYP) and thus it was concluded that these traits could be exploited for the enhancement of yield potential of rapeseed. This study showed that based on the agronomic performance execution, genotypes G8, G14, G19, G21, G47, and G55 might be proposed for future hybridization program in Bangladesh and this could help rapeseed breeders to upgrade their breeding activities.

Open Access Original Research Article

Shallow Water Empirical Remote Sensing Bathymetry Using the Blue/Green and Red Spectrum Regions

Gar Al-Nabi Ibrahim Mohamed

Journal of Scientific Research and Reports, Page 1-8
DOI: 10.9734/jsrr/2019/v22i330091

An atmospherically corrected Sentinel-2 image and a 1/25000 scale nautical chart were used to investigate the performance of the electromagnetic spectrum blue/green and red regions in bathymetric data retrieval. The imaging optical empirical remote sensing bathymetry, using Stumpf (2003) reflectance model was adopted in this investigation. In clean water depth (3.1-7.3) meters both spectrum regions can be used to retrieve bathymetric data with an accuracy of ± (0.82-1.10) m. The optimum electromagnetic spectrum regions in this depth range were the blue/green spectrum range (0.457-0.523 μm) and the red range (0.773-0.793 μm). For depth range (2.1-15.5) m, the blue/green spectrum region (0.457-0.523 μm) produced better results than those of the red region. The clean water derived bathymetric data quality decreases with the increase of water depth in general and with the red spectrum region in particular. The blue/green spectrum region (0.457-0.523 μm) and the red spectrum region (0.773-0.793 μm) correlation coefficient values can be adopted as a measure of the water turbidity, using the characteristic of the water depth strong correlation in turbid water.