Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2751

SRE Articles

Seasonal performance evaluation of solar stills connected to passive external condensers

April 2012

  In recent years, investigations and research has focused on exploring methods and finding ways to enhance solar stills efficiency and increase the production rates. In this study, experiments were carried out for 24 h during summer, autumn, and winter in order to investigate the affect of incorporating passive external condensers to a single-slope, single basin type solar still. Therefore, three identical...

Author(s):   Husham M. Ahmed    

Development and Implementation of E-Education Model in a Higher Education Institution

April 2012

  This paper considers the problem of realization of e-learning infrastructure based on cloud computing at a university level. The primary goal is to develop a model of scalable and reliable infrastructure and services for e-learning. The proposed model is based on a private cloud realized within the existing infrastructure of a higher education institution. The model has been implemented at the Faculty of...

Author(s):   Vladimir Vujin, Aleksandar Milić, Marijana Despotović-Zrakić, Branislav Jovanić and Zorica Bogdanović        

Nonlinear system identification using clustering algorithm and particle swarm optimization

April 2012

  The identification of nonlinear systems operating in a stochastic environment is an important problem in various discipline science and engineering. Fuzzy modeling and especially the T-S fuzzy model draw the attention of several researchers in recent decades this is due to their potential to approximate highly nonlinear behavior. An algorithm allowing the identification of the premise and consequent...

Author(s):   TROUDI Ahmed, HOUCINE Lassad and CHAARI Abdelkader        

ARL performance of residual control charts for trend AR(1) process: A case study on peroxide values of stored vegetable oil

April 2012

  For the purpose of process control, quality assurance engineers in a vegetable oil factory wonder the performance of the Shewhart, CUSUM, and EWMA residual control charts for peroxide values that show both serial autocorrelation between adjacent observations (autocorrelation) and upward linear trend. To deal with autocorrelated process data, a primary method is to apply these charts to the uncorrelated...

Author(s):   Aslan Deniz KARAOGLAN and Gunhan Mirac BAYHAN        

Prediction of rotary machinery degradation status based on vibration data using back propagation (BP) neural network

April 2012

  Rotary machinery has to be maintained and repaired exactly once or several times before they totally failed to keep their good working status. In order to determine the maintenance interval of rotary machinery, machine condition should be predicted by some diagnostic methods and predictive methods. This study was conducted to establish the relationship between machine performance and machine vibration and to...

Author(s):   Bin Wang, Nawal Aswan Abdul Jalil and Wong Shaw Voon        

Antigenotoxic effects of Indian mustard Brassica juncea (L.) Czern aqueous seeds extract against mercury (Hg) induced genotoxicity

April 2012

  The present study evaluates the antigenotoxic effects of B. juncea (L.) Czern.(Indian mustard) aqueous seed extract on the Allium cepa L. (common onion) root tip cells. The experiment was carried at three stages: (1) onion bulbs were treated with 0.75 ppm mercury for 3 h, and then treated with different concentrations (0.1, 0.25, 0.50, 0.75, and 1.0%) of aqueous extract for another 3...

Author(s):   Sonia Sharma and Adarsh Pal Vig        

Effect of tea in the treatment of obesity

April 2012

  Obesity is a growing problem causing significant morbidity and mortality in the word. The efficacy of conventional therapies is limited. Numerous alternative therapies are advocated for weight loss, including dietary modifications, hypnotherapy, and acupuncture. Many herbal medications and dietary supplements have being used. Most have been tested in very limited trials. None have been evaluated to the extent...

Author(s):   Mohammad Sharrif Moghaddasi and Hamed Haddad Kashani        

Residential satisfaction and construction

April 2012

  The failures of many housing projects stems from lack of knowledge on the determinants of Residential Satisfaction (RS) concept. This paper has utilized archival methodology for the past 13 years starting from 1997 until 2010. It aimed to compile existing definitions of RS in order to determine the core and principle of those various definitions. It was found out that RS is a subjective dependent...

Author(s):   Mehdi Sam, Muhammad Fauzi Bin Hj Mohd Zain and Omidreza Saadatian        

DTC torque ripple minimization based on PSO-PID controller

April 2012

  In conventional direct torque controlled (DTC) induction motor drive, there is usually undesired torque and flux ripple. The given torque is the speed output regulator; therefore, it necessary continues tuning for adjusting parameters Kp, Ki. In conventional proportional- integral (PI) speed controller, the performance of motor may differ over time that may cause unexpected torque disturbances, causing...

Author(s):   Hassan Farhan Rashag, S. P. Koh, Ahmed N. Abdalla, Nadia M. L. Tan, K. H. Chong and S. K. Tiong        

Acute toxicity and effects of sub-lethal malathion exposure on biochemical and haematological parameters of Oreochromis niloticus

April 2012

  The specimens of Oreochromis niloticus were exposed to Malathion to determine the lethal concentration (LC50) value and effects of sub-lethal concentrations on haematological and biochemical parameters. The LC50 value was registered as 1.06 mg/l. Fishes exposed to sub-lethal concentrations (0.12, 0.23 and 0.46 mg/l) for 6 weeks revealed that the pesticide causes alterations in various blood...

Author(s):   Khalid Abdullah Al-Ghanim    

Effect of arbuscular mycorrhizas on P use efficiency for growth and N2 fixation in common bean (Phaseolus vulgaris L.)

April 2012

  This study assessed the tripartite symbiosis of common bean (Phaseolus vulgaris L.) with rhizobia and arbuscular mycorrhizal fungi (AMF) in hydroaeroponic culture under sufficient versus deficient P supplies (250 versus75 µmol P plant-1 week-1). The effects of three AMF species on the mycorrhizal root colonization, rhizobial nodulation, plant growth and...

Author(s):   Fatma Tajini, and Jean-Jacques Drevon        

Breed, gender and anatomic location-specific expression patterns of the porcine insig-1 and insig-2 genes

April 2012

  The insulin-induced genes (insig-1 and insig-2) played important roles inadipocyte differentiation and lipogenesis. To determine the breed, gender and anatomic location-specific expression patterns of insig-1 and insig-2, we measured their mRNA abundances in different adipose tissues from male and female pigs for leaner and fatty breeds using a qRT-PCR approach. In accordance with the well-characterized role...

Author(s):   Liu Yingkai, Li Mingzhou, Guan Jiuqiang and Li Xuewei      

The antiurolithiasic and hepatocurative activities of aqueous extracts of Petroselinum sativum on ethylene glycol-induced kidney calculi in rats

April 2012

  Forty-eight (48) male Wistar rats were randomly assigned into 6 groups and treated for 30 days. Group A served as normal control and group B ethylene glycol (EG) control received 1% EG in drinking water. Groups C, D, E and F received 1% EG from day 0 and were used as the treatment subjects. Rats in groups C and D received 200 and 600 mg/kg body weight (BW) of aerial parts aqueous extract, respectively and...

Author(s):   Saeidi Jafar, Lotfi Mehri, Bozorgi Hadi and Mehrzad Jamshid        

Eco- and Neurophysiology Session

April 2012

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Global Perspectives Session

April 2012

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Herbal Remedies Session

April 2012

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Reproductive Physiology Session

April 2012

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Wyndham Competition (Student Presentations) Sessions

April 2012

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Poster Presentations

April 2012

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Cardiovascular and Exercise Physiology Session

April 2012

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List of Participants

April 2012

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Tillage-induced compaction: Effects on physical properties of agricultural loamy soils

April 2012

  Soil compaction due to agricultural tillage practices is a global concern and has profound implications on soil conservation and management with consequent effects on soil productivity. To assess the influence of tillage induced compaction on physical properties, we carried out a comparative study in agricultural loamy soils under tillage and no till manipulation by determining physical properties. Soil...

Author(s):   Olebile Sekwakwa and Oagile Dikinya        

Lignocellulolytic enzymes from tropical fungi: Types, substrates and applications

April 2012

  Lignocellulolytic enzymes constitute a large group of mainly extracellular proteins including ligninolytic enzymes (peroxidases and oxidases) and hydrolytic enzymes (cellulases, hemicellulases, pectinases, chitinases, amylases, proteases, esterases, and mannases). These enzymes have attracted a wide range of industrial and environmental applications including pulping, de-inking, decolourization and...

Author(s):   Godliving Y. S. Mtui      

Skeletal ontogeny of Seychelles giant tortoises (Aldabrachelys/Dipsochelys)

March 2012

The skeletal development of captive bred Seychelles-Aldabra giant tortoises (Dipsochelys/Aldabrachelys) was studied from late embryos to adults based on 93 specimens (45 embyronic). The pattern of ossification is described and the developments of the characters used to distinguish different morphotypes are investigated. The timing of ossification of different bones in this genus is similar to the patterns reported for...

Author(s): Justin Gerlach

Optimal homotopy perturbation method for solving partial differential equations with large solution domain

March 2012

In this paper, an efficient modification of homotopy perturbation method, namely optimal homotopy perturbation method, is introduced for solving linear and nonlinear partial differential equations with large solution domain based on a new homotopy perturbation method and Padé approximation method. We compare the performance of the method with those of new homotopy perturbation and optimal variational iteration...

Author(s): M. Abolhasani, M. M. Hosseini, H. Ghaneai and Syed Tauseef Mohyud-Din

Power quality monitoring system based on embedded system with network monitoring

March 2012

This paper has proposed a power quality monitoring system on the detection of power disturbance in real-time by using an embedded system. It can be controlled and monitored by its function via Ethernet network. This system has been developed to monitor and detect any disturbance signals in power lines. If any phase in the power lines has disturbance, the monitoring system will store the fault data into the chosen memory...

Author(s): Krisda Yingkayun, Suttichai Premrudeepreechacharn, Neville R. Watsonand Kohji Higuchi

Alteration of cotyledonary globulins and albumins mobilization in pea exposed to cadmium

March 2012

Seed germination and post germination events are complex physiological processes which can be seriously affected by heavy metals. Cadmium (Cd) is an environmental pollutant extremely toxic to plants and other living organisms including humans. To assess Cd phytotoxicity, pea seeds (Pisum sativum L. var. douce province) were germinated in distilled water or 200 µM CdCl2. Cadmium treatment induces a deleterious...

Author(s): Khadija Jaouani, Abdelilah Chaoui and Ezzdine El Ferjani

Complementary food blends and malnutrition among infants in Ghana: A review and a proposed solution

March 2012

Widespread malnutrition among Ghanaian infants could be attributed to unfortified plant-based complementary foods commonly used at the household level. This review summarises the publications on the development of complementary food blends and intervention trials aimed at improving the nutritional status of Ghanaian infants. The complementary food blends are cereal-based which are developed from maize (in higher...

Author(s): Francis Kweku Amagloh, Janet L. Weber, Louise Brough, Allan Hardacre, Anthony N. Mutukumira and Jane Coad

Comparative phytochemical and ethnomedicinal survey of selected medicinal plants in Nigeria

March 2012

Phytochemical screening and ethnomedicinal survey of twenty-two medicinal plants distributed in fifteen different families were carried out in order to know the distribution of secondary metabolites and the diseases being treated with these plants. It was discovered that alkaloids, tannins and saponin were present in all.  Flavonoid was absent only in Peperomia pellucida; five out of these plants lack terpene,...

Author(s): Felix Oluwafemi Omotayo and Temitope Israel Borokini

A smart energy management system for monitoring and controlling time of power consumption

March 2012

Energy resources and their management is one of the prime challenges to the world especially low economy developing countries like Malaysia where the majorcontribution to energy generation is based on imports setting a considerableweight on the...

Author(s): Azhar Fakharuddin, Ahmad N. Abdalla, Muhammad Rauf, Nik Mohd Kamil, Salman Ahmad and Ashad Mustafa

The Tucumán solar UV transparency experiment: Preliminary results and prospective

March 2012

Two radiometers were simultaneously operated during the past dry season in Tucumán province, NW Argentina. The main objective was to determine particulate matter content of the atmosphere. Ampimpa, an astronomic observatory up in the mountains, was adopted as the reference, non polluted monitoring site. The INTA meteorological facility at Famaillá, in the plains, was chosen as an air pollution test site,...

Author(s): Otón Matías Grimolizzi, Lidia María Benítez and Ana María Frenzel

An electromagnetism-like mechanism for solving cell formation problems

March 2012

This paper presents an electromagnetism-like mechanism (EM) algorithm in order to solve cell formation problems. Based on the attraction-repulsion principle in electromagnetic theory, each combination of the part and machine groups was regarded as a charged particle. The total force calculation and the move along the total force calculation were then determined out to either maximize the cell group effectiveness or...

Author(s): Nai-Chieh Wei, Hsiao-Kang Lin and Peitsang Wu

Household Asset Index and Total Iron Intake, but not Education, best Predict Iron Status in a Black Population Sample in Gauteng, South Africa

March 2012

This paper reports on independent associations of household asset index and education, as components of socio-economic status, on iron status in a black population sample in Gauteng province. The study was cross-sectional, involving 40 men, 184 women (n = 224), randomly selected, based on informed consent. Socio-economic, dietary intake and biochemical data were collected using household socio-demographic...

Author(s): Hedwig Acham, Abdulkadir A. Egal and Wilna H. Oldewage-Theron

Multi-user detection in ultra-wideband multiple-access communications systems using an efficient heuristic algorithm

March 2012

This paper investigates learning and achievable bit error rate (BER) performance of ultra-wideband (UWB) systems that use intelligent multiuser detector (MUD) when communicating over UWB channels that experience both multiuser interference (MUI) and intersymbol interference (ISI), in addition to multipath fading. Multiple access interference (MAI) degrades performance of conventional single user detector in UWB systems....

Author(s): Ho-Lung Hung and Hsing-Chung Chen

An overview of water pollution and constructed wetlands for sustainable wastewater treatment in Kathmandu Valley: A review

March 2012

Due to lack of strong legislation and guidelines to control untreated wastewaters and industrial effluents, surface and groundwater sources have been deteriorated seriously in Kathmandu Valley. Although, there are five centralized wastewater treatment plants in the valley, most of them are out of order. In recent years, constructed wetlands (CWs) have gained attention in the country for treating domestic...

Author(s): Anup Gurung and Sang-Eun Oh

Improving the quality of pigskin leather texture images using enhanced image processing

March 2012

In this paper, we propose a method to improve the quality of pigskin leather texture images using digital image processing approach. The proposed method intends to minimize the imbalance illumination problem that occurs in the images captured from consumer leather products. This method is compared with the other methods in the literature such as contrast adaptive binarization method, and the results showed that the...

Author(s): Mohd Hafrizal Azmi, Fakhrul Zaman Rokhani, Raja Syamsul Azmir Raja Abdullah and M. Iqbal Saripan

Assessing the performance of improved harmony search algorithm (IHSA) for the optimization of unconstrained functions using Taguchi experimental design

March 2012

This paper describes the meta-heuristic improved harmony search algorithm (IHSA) and analyzes the performance of IHSA in solving unconstrained function minimization problems. The most important challenge to this algorithm is setting the parameters for various optimization problems. Performance of IHSA is quite sensitive to initial settings. Using Taguchi’s experimental design to arrange IHSA parameters, the...

Author(s): Danijel Marković, Miloš Madić and Goran Petrović

Physico-chemistry, mineralogy, geochemistry and nutrient bioaccessibility of geophagic soils from Eastern Cape, South Africa

March 2012

The consumption of soils is widely practiced in several rural communities in the world including the Eastern Cape Province of South Africa which is considered to be poor with a large rural population where culture and indigenous practices remain endemic and well entrenched. This pioneering study of geophagic soils from the province had its primary objective of understanding their physico-chemistry, mineralogy, and...

Author(s): V. M. Ngole and G. E. Ekosse

Intelligent computer vision system for Sprague-Dawley rat sperm classification using gray-level microscopic images

March 2012

This paper presents a development of intelligent computer vision system for Sprague-Dawley rat sperm classification. The system is developed to help pathologists and improve the current conventional detection methods and classification of Sprague-Dawley rat sperm. The conventional method tends to result in errors and is also time consuming. Thus, the new computer vision system is developed to overcome these problems...

Author(s): Samy A. Salamah, Nor Ashidi Mat Isa, Khairunnisa Hasikin, and Umi Kalthum Ngah

Quality of water from dug wells and the lagoon in Lagos Nigeria and associated health risks

March 2012

The aim of this research work was to assess the quality of the water from dug wells and lagoon in Lagos, Nigeria, ascertain the contamination problems that may confront the consumers, determine the health risks and suggest appropriate remedies. Twenty (20) dug wells were randomly selected in Oworonshoki area of Lagos and water samples were collected during July to August 2010. The samples were checked for odour, colour...

Author(s): B. A. Adelekan and O. A. Ogunde

ILOMPEL: Information and metadata modeling for personalized e-learning

March 2012

This paper presents the pedagogically and psychologically engaged Personalized e-Learning Course Model (PeLCoM) and the Information Learning Object Model for Personalized e-Learning (ILOMPeL), based on variations of students’ intellectual profiles. Developed information learning object model makes clear the set of learning resources and organizes them in the way that it is possible to pack them, sequence, and to...

Author(s): Dragica Jovanovic, Malisa Zizovic and Danijela Milosevic

An improvement of electrical characteristics of P-N diode by X-ray irradiation method

March 2012

This paper presents a new technique of semiconductor fabrication technology, where a soft X-ray annealing method is proposed as a new technique and used in this work. The effect of Pt and Soft X-ray annealing on P-N diodes was investigated. The tested P-N diodes were fabricated at TMEC laboratory using CMOS technology. Results obtained have shown that the platinum doping is affected both reverse and forward current...

Author(s): Jirawat Prabket, Itsara Srithanachai, Surada Ueamanapong, Amporn Poyai, Wisut Titiroongruang, Surasak Niemcharoen and Preecha P. Yupapin

Determination of some trace element nutritional status of cherry laurel (Prunus laurocerasus L.) with leaf analysis which grown natural conditions in Eastern Black Sea region of Turkey

March 2012

This investigation was carried out to determine the trace element nutritional status of cherry laurel (Prunus laurocerasus L.) in Eastern Black Sea region of Turkey. For this purpose, leaf samples were collected from different 20 cherry laurel (P. laurocerasus L.) gardens in June. Iron (Fe), copper (Cu), zinc (Zn), manganese (Mn), boron (B) and molybdenum (Mo) contents were determined in leaf samples....

Author(s): Sevinç AdiloÄŸlu

Influences of the window size of moderate resolution imaging spectroradiometer (MODIS) aerosol optical thickness (AOT) values on particulate matter (PM10) motoring in Klang Valley, Malaysia

March 2012

Remote sensing has been shown to be a useful tool in retrieval aerosol optical thickness (AOT) in particulate matter (PM) pollution monitoring. In this study, daily AOT data retrieved from moderate resolution IMAGING spectroradiometer(MODIS) and the amount of PM10 measured at eight air quality monitoring ground stations in Klang Valley from 2004 to 2006 were used. The AOT values consisted of...

Author(s): Jamil Amanollahi, Ahmad Makmom Abdullah, Mohammad Firuz Ramliand Saeid Pirasteh

Quantum message exchanging network using entanglement swapping and decoy photons

March 2012

We propose a scheme for secure quantum message exchanging network following the idea in entanglement swapping. In this scheme, the servers of the network provide the service for preparing the Greenberger-Horne-Zeilinger (GHZ) entangled states as quantum channels. For preventing the eavesdropping, a security checking method is suggested. After the security check, anyone of the authorized users can exchange his/her...

Author(s): Negin Fatahi and Mosayeb Naseri

Natural radioactivity in drinking and mineral water in Johor Bahru (Malaysia)

March 2012

The radiological quality of 238U, 232Th and 40K in some samples of drinking and mineral water collected in Johor Bahru, Malaysia has been measured by direct  ray spectroscopy using high purity germanium detector in this paper. Mean activity concentration of 238U, 232Th and 40K in drinking and mineral water were found 1.48 ± 0.12, 9.59 ± 0.83, 39.67 ± 1.69 ppm and...

Author(s): N. M. Yussuf, I. Hossain and H. Wagiran

Evaluation of microbiological hazards in barbershops in a university setting

March 2012

There is a growing concern that barbershops could serve as a potential source of bacterial, fungal or even viral infections and little is known about microbiological hazards of barbershops in the university environment in Nigeria. This study evaluated microbiological hazards of barbershops in a university setting in Nigeria. To determine the types of microorganisms prevalent in barbershops, combs, brush, clippers and...

Author(s): S. C. Enemuor, A. R. Atabo and O. O. Oguntibeju

Performance improvement of hybrid SCM SAC-OCDMA networks using multi-diagonal csode

March 2012

Hybrid Subcarrier Multiplexing (SCM) incorporating spectral amplitude coding optical code division multiple access (SAC-OCDMA) technology was investigated both mathematically and by simulation. The hybrid SCM/SAC-OCDMA system combined two schemes in such as a way that the resulting hybrid system is robust against the Multi- Access Interference (MAI) and much enhanced the channel data rate. In this paper, we describe the...

Author(s): Thanaa Hussein Abd, S. A. Aljunid, Hilal A. Fadhil, Ibrahim Fadhil Radhi,Ahmad R. B. and M. A. Rashid

Generic method for statistical testing of parallel programs based on task trees

March 2012

This paper deals with a particular class of parallel programs, which are based on task trees. The main objective of this paper was to adapt the generic method for statistical testing of sequential programs (GMST-SP) for this class of parallel programs, such that adapted method (GMST) can treat a family of task trees rather than just a single task tree, and that it can respect various evolutions of individual task trees....

Author(s): Miroslav Popovic, Ilija Kupresanin and Ilija Basicevic

Comparison of the tissue biocompatibility of Resilon and gutta-percha cones

March 2012

The aim of this study was to evaluate the tissue biocompatibility of Resilon compared to gutta-percha cones. Three subcutaneous pockets were made in the back of 36 rats weighing between 200 to 250g. Subcutaneous pockets were left unfilled (control, 1 pocket) or filled with Resilon (1 pocket) or gutta-percha (1 pocket). At 3, 10, 30 and 90 days after implantation, 9 rats were killed and the materials were removed...

Author(s): Maryam Foroozia, , Mamak Adel, , Marjan Nassiri-Asl, , Poopak Masumi, 

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