Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2738

Table of Content: 18 January, 2013; 8(3)

January 2013

Gillnet selectivity, seasonal, tidal and photoperiod variation in catch in the lower Nun River, Niger Delta, Nigeria

The fish species of the lower Nun River was sampled to determine gillnet selectivity and the effect of season, tide and photoperiod variation on the catch. A total of 11,156 specimens were caught belonging to 14 families consisting of 25 species. Gillnet selectivity was observed with a declining trend from the largest mesh size net of 15 mm (58%) in number and 59% by weight, 12 mm (33%) in number and 33% by weight with...

Author(s): Martin E. Allison and Daniel Okadi

January 2013

Nanometer complexes from explosives

Lithium manganese oxides are of great interest as cathode materials for lithium-ion batteries. We describe here a new combustion method to synthesize lithium manganese oxides directly from lithium nitrate, manganese nitrate, ammonium nitrate and glycol. The resultant LiMn2O4 synthesized under the optimum synthesis conditions shows perfect spinel structure and uniform particle size distribution. The combustion...

Author(s): Huisheng Zhou and Xinghua Xie

January 2013

Seepage evaluation of an earth dam using Group Method of Data Handling (GMDH) type neural network: A case study

The seepage critical impact and significant destructive nature during and after construction of earth dams have been increasingly important topics during the past decades. In this paper, a new approach is presented for determination of seepage induced flow under and through an earth dam based on Group Method of Data Handling (GMDH) algorithm. After careful (detailed) studying of an earth dam called Fileh Khase dam...

Author(s): Saeed Poorkarimi Kokaneh, Shahram Maghsoodian, Hossein MolaAbasi and Afshin Kordnaeij

January 2013

Finite element simulation of non- linear deformation behaviour in large diameter angular contact thrust bearing

The objective of the present study is to obtain relevant contact stiffness for a single ball-raceway contact which can be used in load distribution analysis of full bearing. Towards this, an elastic constitutive model is used in the 3D finite element analysis of load deformation characteristic of large diameter bearing ball - raceway contact and the finite element results are validated by conducting experiment on the...

Author(s): M. S. Starvin, S. Babu, Sriramachandra Aithal, K. Manisekar and P. Chellapandi

January 2013

Edge detection via statistical features and automatic thresholding technique

In this paper, the problem of edge detection is addressed using the first order statistics and automatic thresholding technique. The general idea of edge detection using the simple edge detectors such as gradient operators or second derivative operators is extended to the statistic domain. The statistical features are used to describe the relationship between the current pixel and its neighboring, then, the thresholding...

Author(s): Salim Ben Chaabane, Mounir Sayadi and Farhat Fnaiech

January 2013

The influence of Didecyldimethylammonium Chloride on the morphology and elemental composition of Staphylococcus aureus as determined by NanoSAM

Didecyldimethylammonium chloride (DDAC) is a Quaternary Ammonium Compound (QAC) disinfectant often used in the poultry industry to disinfect hard surfaces. DDAC is a membrane active agent and causes the leakage of important intracellular material. Understanding the mode of action and possible resistance is important; in particular, the pending post antibiotic era that the poultry industry is facing. Staphylococcus...

Author(s): Arina C. Jansen, Charlotte E. Boucher, Elizabeth Coetsee, Johan L. F. Kock, Pieter W. J. van Wyk, Hendrik C. Swart and Robert R. Bragg