Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2753

Table of Content: March 2009; 4(3)

March 2009

Behaviour of embedded generation during the voltage sags in distribution networks

  In recent years, using of small generators connected to distribution networks has been increasingly preferred to supply local loads. They are called embedded or distributed generators because of they are connected to distribution networks. Both of them are generally used synonymously and interchangeable. In this study, dynamic performances of embedded genera-tors are observed during and after the faults. The...

Author(s): Ahmet Serdar Yilmaz and Ertan Yanikoglu

March 2009

Plants used for female reproductive health care in Oredo Local Government Area, Nigeria

  The state of maternal health in Nigeria is poor and can be attributed to inadequate access to reproductive health services, poverty and in some areas cultural resistance. Consequently, many rural people in Nigeria turn to ethno-medicinal health care systems due to accessibility, affordability, availability and an inherent trust in this method. These systems are threatened by erosion of plant diversity and...

Author(s): Folu M. Dania Ogbe, Oyomoare L. Eruogun and Marilyn Uwagboe

March 2009

Deformations and stresses in rotating FGM pressurized thick hollow cylinder under thermal load

  Using the infinitesimal theory of elasticity, closed form solutions for one-dimensional steady-state thermal stresses in a rotating functionally graded (FGM) pressurized thick-walled hollow circular cylinder are obtained under generalized plane strain and plane stress assumptions, respectively. The material properties are assumed to vary nonlinearly in the radial direction and the Poisson’s ratio is...

Author(s): M. Zamani Nejad and G. H. Rahimi

March 2009

Genetic expression programming for prediction of heat of hydration of the blended cements

  This study presents a new approach based on Genetic Expression Programming (GEP) for modeling of variation of heat of hydration of Portland and blended cements. For that purpose, two different GEP models were developed to generate two mathematical equations. In the GEP Model 1, six input parameters such as the ground blast furnace slag replacement ratio (GBFS), ground basaltic pumice replacement ratio...

Author(s): Hanifi Binici, Cafer Kayadelen, Ä°smail H. ÇaÄŸatay, Mustafa Tokyay and Hasan Kaplan

March 2009

Determining the recreational demands and tendencies of students at Atatürk University through questionnaires

  If recreational planning is to be made considering the demands and tendencies of users, limited resources will be utilized more profitably and the needs of the users will be met more effectively. From this point of view, the purpose of this study was to determine the recreational tendencies of students at Atatürk University and investigate whether the campus was satisfactory enough to meet the needs. At...

Author(s): Hilal Turgut, Pervin Yesil and Sevgi Yilmaz

March 2009

The effect of AntNet parameters on its performance

  AntNet is a routing algorithm which takes advantage of the way ants help each other to find food sources faster. Ants’ communication in this respect is indirect by leaving pheromone trails as they move. The richness and thickness of the trail is proportional to the number of ants that have passed. This method of indirect courtesy guidance by affecting the environment is called stigmergy. Many network...

Author(s): S. Saffariaman, S. Shamshirband, H. Shirgahi, M. Gholami and B. Kia

March 2009

Generalized optimal controller design for all pole systems using standard forms

  In this work, a generalized controller design method for the systems with all pole transfer function has been given. The method basically uses the standard forms, which have been introduced firstly in 50’s and improved recent years. In the proposed method, a PI controller, which is in the feed forward and a polynomial controller, which is in the feedback path, are used. Degree of the polynomial...

Author(s): Ali Fuat Boz and Yavuz Sari

March 2009

Prevalence of seed-borne fungi in sorghum of different locations of Bangladesh

  Fungi associated with sorghum (Sorghum vulgare) seeds collected from eight different locations viz. Jamalpur, Kushtia, Mymensingh, Pabna, Rajbari, Rajshahi, Savar and Sherpur of Bangladesh were detected by Blotter method. About 36% of the sorghum seeds were infected by different species of fungi obtained from the selected locations and nine different fungi identified in order of prevalence, were-Curvularia...

Author(s): S. M. M. Islam, M. M. I. Masum and M. G. A. Fakir

March 2009

Comparative in vitro assessment of the antiplasmodial activity of quinine – zinc complex and quinine sulphate

  Incessant malaria endemicity in the tropics and subtropical regions and the recent work done on the synthesis of metal drug complexes of antimalarial drugs and the evaluation of their antimalarial activities in vitro, has led to the development of this study. Quinine-Zinc complex (QZ) was synthesized using a modification of Singla and Wadhwa method. Melting point determination, TLC analysis, infra red,...

Author(s): O. O. Ogunlana, O. E. Ogunlana and O. G. Ademowo

March 2009

Studies on the pH and protein content of tomato (Lycopersicon esculentum Mill) fruits deteriorated by Aspergillus niger

  Tomato (Lycopersicon esculentum Mill) fruits obtained from the local market in Sango Ota, Ogun State, Nigeria were inoculated with Aspergillus niger from cultures grown in the laboratory and incubated under appropriate conditions of temperature and moisture to initiate infection for seven days. Extensive lesions and subsequent collapse of the tomato fruits inoculated with A....

Author(s): Ajayi, A. A. and Olasehinde, I. G.

March 2009

Evaluation of the bacteriological characteristics of poultry litter as feedstuff for cattle

  The bacteriological characteristics of poultry litter as feedstuff for cattle was evaluated by subjecting it to heat treatment by deep stacking.  Litter samples were assayed for pathogens before heat treatment commenced. The litter was bagged, stacked and covered with thick, black plastic cellophane in a roofed building for 21 days. The temperature of the stack was monitored with a thermometer and the...

Author(s): E. M. Ngodigha and O. J. Owen