Open Access Short Research Article

The Study of Rate of Scour at Cylindrical, Square and Round Nosed Piers

Livingstone Swilla, Shija Kazumba

Journal of Scientific Research and Reports, Page 1-7
DOI: 10.9734/JSRR/2017/33019

Rate of scour adjacent to piled foundations may result in rapidly loss of skin friction and load bearing capacity of the piles. The piles may be subjected to unplanned bending stresses, from lateral loads and hydrodynamic forces. The knowledge related to the time taken by different piers to achieve a certain scour depth is limited. In this study experiments were conducted using wooden pier models in the re-circulating glass sided tilting flume of 12,5 m length, 300 mm width and 450 mm deep. In all three tests water depth, discharge, and mean approach flow velocity in the channel were kept constant. The flume was filled with cohessionless bed material (artificial sand) average grain diameter of 0.203 mm to a uniform thickness. The scour depths observed from experiments were 30 mm, 16 mm and 14 mm in square, cylindrical and round nosed piers respectively. It was observed that, it takes more time for the cylindrical and round nosed piers to achieve scour depth of 22.2 mm and 20 mm respectively as estimated by Breusers and Raudkivi 1991. The results also showed that: it takes shorter time for a square nosed pier to achieve its empirical scour depth value of 26.7 mm. This indicates that the rate of scour depth development in square nosed pier is higher than that of the cylindrical and round nosed piers at a given time.

Open Access Original Research Article

Estimation of Indoor Radon and Its Progeny in Dwellings of Akoko Region, Ondo State, Southwestern Nigeria

Adeola Margaret Asere, Isaac Rotimi Ajayi

Journal of Scientific Research and Reports, Page 1-7
DOI: 10.9734/JSRR/2017/32246

Radon gas is by far the most important source of ionizing radiation among those that are of natural origin. In this study, radon was measured in some homes built of different types of building materials in Akoko region of Ondo state, Nigeria. The test was conducted using Accustar alpha track long term passive test devices containing CR-39 solid state nuclear track detector foil. The detectors were exposed for a period of six months. After removal the detectors were subsequently etched electrochemically and counted with computer aided image analysis system. The results show that radon concentration varies between 15.00 Bqm-3 to 141.00 Bqm-3 with a mean of 35.54 Bqm-3 and geometric mean of 29.95 Bqm-3. Annual exposure varied between 0.10 WLM to 0.17 WLM with a mean of 0.13 WLM, annual effective dose varied between 0.38 mSvy-1 to 0.69 mSvy-1 with a mean of 0.50 mSvy-1 and lifetime fatality risk varied between 0.50x10-4 to 0.85x10-4 with a mean of 0.64x10-4 in bedroom, living room, store and lobby. This study shows that the local soil origin greatly contributes to radon concentrations recorded in these areas.

Open Access Original Research Article

Semi-Analytical Method for the Computation of Nonlinear Second Order Differential Equations

J. Sunday, M. P. Agah, J. A. Kwanamu

Journal of Scientific Research and Reports, Page 1-9
DOI: 10.9734/JSRR/2017/32932

This research paper considers a semi-analytical method called the Adomian Decomposition Method (ADM) for the computation of nonlinear second order differential equations. The analysis of the method will also be carried out to show the convergence of its solution. The method has the advantage of providing the solution to problems in a rapidly convergent series with components that are easily computable. The method also has an advantage of being continuous with no resort to discretization as is the case with most conventional methods. Numerical and graphical results shall also be presented to buttress out points.

Open Access Original Research Article

Stability Analysis of Different Chilli Hybrids (Capsicum annuum L.) for Their Yield and Yield Attributing Traits

Hadora Raghavendra, T. B. Puttaraju, Damodar Varsha, Jodage Krishnaji

Journal of Scientific Research and Reports, Page 1-9
DOI: 10.9734/JSRR/2017/33187

Chilli, an important vegetable crop in India. It is sensitive to environmental variations and climate change. An investigation was carried out to assess the stability of 25 test hybrids along with three commercial check varieties across different locations. Pooled analysis of variance showed the presence of significant genetic variability among the hybrids for all the characters studied. Variance due to hybrid × environment interaction was non-significant for red fruit yield plantˉ1, number of fruits plant-1, average fruit length (cm), fruit weight and fruit width except green fruit yield plant-1. Considering all the stability parameters, CMS10A x Byadgikaddi for fruit weight and fruit width, CMS10A × Gouribidanur for green fruit yield plant-1, CMS10A x LCA 206 for red fruit yield plant-1 and CMS8A × Byadgidabbi for number of fruits were exhibited below average stability and these were specifically adopted to unfavorable locations. The test Hybrids, CMS6A × Tiwari for average fruit weight, CMS9A × LCA 206 for the character fruit width were well adopted to all environments. CMS10A × Gouribidanur proved to be the best yielding hybrid, having higher yield level than the check and were also stable for most of the characters as evident from their non-significant s2di values.

Open Access Review Article

Teaching Linear Programing in Mathematics Education to Improve Human Health

Beatrice Nakhanu Shikuku

Journal of Scientific Research and Reports, Page 1-8
DOI: 10.9734/JSRR/2017/33181

The 1984 World Health Organization (WHO) defines health as "the extent to which an individual or group is able to realize aspirations and satisfy needs, and to change or cope with the environment.” Health is a resource for everyday life. It is a positive concept emphasizing social and personal resources, as well as physical capacities. To maintain human health is a complex matter, thus the need to apply mathematics education, and in particular, linear programming knowledge and skills, in order to bring up a healthy community. Linear Programming is about making maximum benefit or minimum loss out of limited resources in daily life. Applications of linear programming date back to 1930 and were first attempted by the Soviet mathematician Leonid Kantorovich and by the American economist, Wasilly Leontief. Linear programming is applied in many health programs. These include; application of linear programming in health care, in the most affordable heath diet, in surgery, menu planning, food production and in feeding. Linear programming is used by farmers to determine how much space to be used for each crop especially when practicing mixed farming and for optimal health care resource allocation. Linear programming is also used in home health care and medical services. It is used in radiation therapy treatment, for menu planning in restaurants and in nurses scheduling. It is therefore recommended that the topic linear programming be taught to all Kenyan students irrespective of what career they hope to pursue. This will go a long way in enabling the Kenyan society to maintain good health at minimum cost.