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: 3 December, 2012; 7(47)

December 2012

Ecophysiology of plant growth promoting bacteria

Plant growth-promoting rhizobacteria (PGPR), are beneficial bacteria that colonize plant roots and enhance plant growth through a variety of mechanisms that include improvement of plant nutrition, production and regulation of phytohormones, and suppression of disease causing organisms. Whereas members of the bacterial genera Azospirillum and Rhizobium are well-studied examples for plant growth...

Author(s): Lubanza Ngoma, Olubukola Oluranti Babalola and Faheem Ahmad

December 2012

Extraction of coronary artery trees in angiocardiography images

Dynamic variations of coronary arterial curvilinearity have been very difficult to study in the current angiograms. However, there is both experimental and clinical evidence showing that vessel extraction is very useful for the purposes of surgery treatment and clinical study. We propose in this paper an automated algorithm to locate the outline of the coronary artery tree blood vessels in angiograms. The proposed...

Author(s): Hasan H. Khaleel, Rahmita O. K. Rahmat, D. M. Zamrin, Ramlan Mahmod and Norwati Mustapha

December 2012

Microbiota associated with commercially produced traditional banana beer in Rwanda

Brewing and consumption of traditional beers have socio-economic importance in most African countries, including Rwanda. In this study, the microbiological quality (of selected microbes) of commercially produced traditional banana beer was investigated, using both traditional culture-dependent and culture-independent methods. Two brands of commercially produced traditional banana beer (brands A and B) were obtained from...

Author(s): K. Shale, J. Mukamugema, R. J. Lues, P. Venter and O. De Smidt

December 2012

Grain combine repair and maintenance costs as affected by machine width

Work-job orders for 15 combines with different machine widths were studied in this research paper. Data for 352 work-job orders were recorded as repair or maintenance for nine items. These items included, header unit, threshing unit, separation unit, cleaning shoe unit, engine, pre-harvest jobs, general and fabrication works, electrical and tires. Total annual cost for each item was determined, and the ratio of total...

Author(s): Saleh A. Al-Suhaibani, Mohammed F. Wahby and Ibrahim S. Tabash

December 2012

Enhanced efficient group key transfer scheme for wireless sensor networks

Wireless sensor networks (WSNs) have become a motivating technology as it can be constructed without communication infrastructures. WSN operates in harsh environment; therefore information security in infrastructureless WSN is one of the most important challenges. WSN possess different network architectures. Cluster-based WSN architecture is found to be efficient with reduced transmission power and...

Author(s): Annlin Jeba S. V. and Paramasivan B

October 2013

Pediculosis among primary school children in Calabar, Nigeria and implications for control

This study was undertaken to determine the prevalence of head lice among primary school children in a semi-urban area of Calabar, Cross River State, Nigeria. A total of 204 children aged 6 to 12 years from both genders had their hair and scalp examined by visual inspection for head lice. A questionnaire was used to assess children’s knowledge about the ectoparasite – Pediculus humanus capitis. The...

Author(s): Etim S. E., Ohioma M. E., Okon O. E. and Akpan P. A.

December 2012

Analysis of a tandem queue with heterogeneous servers subject to catastrophes

This study analyzed a tandem queueing system with blocking and no waiting line. The arrival process is assumed to be Poisson with rate. There are two non-identical servers in the system. The service times are exponentially distributed with parameters and  at servers 1 and 2, respectively. Besides, the catastrophes occur in a Poisson manner with rate  in the system. When server 1 is busy or...

Author(s): H. Okan Isguder and Cansin Kaya

December 2012

Evaluation of mechanical and permeability related properties of self compacting concrete containing metakaolin

In this paper, mechanical and permeability related properties of Self Compacting Concrete (SCC) containing metakaolin (MK) were evaluated and their interrelationships discussed. For this purpose, different types of mixture were prepared with different amounts of MK and ordinary Portland cement (OPC) was replaced by 5, 10, 15 ... 30% of MK. When increasing the percentage of MK, the mechanical and permeability related...

Author(s): V. Kannan and K. Ganesan

October 2013

Effects of baffles geometry on sloshing dynamics of a viscous liquid tank

Baffles are used effectively to reduce the sloshing response of liquid in the liquid storage containers. In this paper, a brief equivalent method is proposed to model the influence of different baffle geometrical effects on liquid sloshing. It has been showed that the natural frequencies and the dynamic response of the liquid in the container are drastically changed if the free liquid surface in a cylindrical container...

Author(s): Morteza Shahravi and Milad Azimi

December 2012

Interactive web-based campus information system

Data can be stored accurately, up-to-date and in a complete sense while it is possible to correlate to certain data and present them for sharing thanks to the facilities brought in by the technology of geographical/urban information system. Being at a significant position in terms of transitioning into the age of information, universities are among the top institutions where information is utilized most efficiently....

Author(s): Abdurrahman Geymen