Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2755

Table of Content: 11 August; 6(15)

August 2011

Estimating waist circumference from BMI in South African children

Waist circumference (WC) is proposed as a better marker in the diagnosis of metabolic syndrome in children than body mass index (BMI). As important as this anthropometric index may appear, it is not as commonly measured in schools as BMI. Thus unlike BMI, data on WC are scarce. Therefore, we investigated whether there is an alternative way to estimate WC even in those children whose WC measurement has not been taken. We...

Author(s): D. T. Goon, A. L. Toriola, B. S. Shaw and O. Akinyemi

August 2011

Application of particle swarm optimization algorithm-based fuzzy BP neural network for target damage assessment

It has proposed a kind of hybrid method based on intuitionistic fuzzy set theory and particle swarm optimization (PSO) algorithm-based neural network (NN). We apply it to the integrative damage effect assessment of battlefield target. Firstly, we improve PSO algorithm, propose the adaptive inertia factor and excellence selection mechanism, introduce inter-partition particle swarm initialization and simulated annealing...

Author(s): Hui Yuan, Jun Zhi, and Jianyong Liu

August 2011

Electrical cell lysis using a microfabricated device

Interest in electrical lysis of biological cells on a microfluidic chip device has increased as it allows for the rapid recovery of intracellular contents without introducing lytic agents. In this research, a new microfabricated device for cell lysis has been developed. The device utilized a microfabricated interdigital electrode array to generate a pulsed electric field with a low voltage, a requirement for effective...

Author(s): Jianjun Chen, Jun Yu, Yijun Gao, Runiu Ding and Mei Yu

August 2011

The effects of different sowing time practices on Vitamin C and mineral material content for rocket (Eruca vesicaria subsp. sativa (Mill))

Salad rocket largely differs in composition and content for antioxidants such as Vitamin C together with a significant variability of bioactive compounds. Rocket encloses the highest Vitamin C content among the Brassicaceae vegetables used for salad. The content of Vitamin C and minerals in plants is affected by seasonal factors such as sowing time and the date of harvesting. The existence of Vitamin C and mineral...

Author(s): Funda Eryilmaz Acikgoz

August 2011

Differences in brain activation during motor imagery and action observation of golf putting

The purpose of this research is to investigate the differences in brain activation between motor imagery and action observation by analyzing suppression of mu rhythm during motor imagery and action observation of golf performance. Eighteen male university students participated in the study and were randomly assigned to one of three groups: action observation, motor imagery with eyes open or motor imagery with eyes...

Author(s): Tae-Ho Kim and Angelita Cruz

August 2011

Proposing a model for preparation of the soil-water erosion type maps

Some methodologies were compared in providing maps of surface, rill and gully erosion features, in research which took place in the Jajrood basin, north-east Tehran, Iran. A photomorphic unit map was produced from processed satellite images, and four other maps were prepared by the integration of different data layers, including slope, plant cover, geology, land use, rocks erodibility and land units. Comparison of...

Author(s): Ali Mohammadi Torkashvand

August 2011

Association of the p53 codon 72 polymorphism with colorectal cancer in South West of Iran

The p53 tumor suppressor gene plays two important roles in genomic stability: blocking cell proliferation after DNA damage until it has been repaired, and starting apoptosis if the damage is too critical. Codon 72 exon4 polymorphism (Arg72Pro) of the P53 gene has been implicated in cancer risk. Various studies have been done to investigate the status of p53 at codon 72 for arginine (Arg)...

Author(s): Abbas Doosti, Meghdad Zamani, Payam Ghasemi Dehkordi, Shahla Taheri, Mehdi Banitalebi and Mehdi Mahmoudzadeh

August 2011

Determination of welding parameters for shielded metal arc welding

Arc welding is a type of welding that uses a welding power supply to create an electric arc between an electrode and the base material to melt the metals at the welding point. They can use either direct (DC) or alternating (AC) current, and consumable or non-consumable electrodes. The process of arc welding is widely used because of its low capital and running costs. In this paper, arc welding parameters are...

Author(s): Ugur Soy, Osman Iyibilgin, Fehim Findik, Cemil Oz and Yasar Kiyan

August 2011

Site selection for small gas stations using GIS

These days one of the main concerns of transportation managers is inter-city communications. In this regard, supplying the required fuel for vehicles and consequently, suitable site location for fuel stations is considered a main issue. The location of fuel stations could influence human life tremendously, and even minor biases in selecting the location could lead to remediable losses. In today’s world, the...

Author(s): Mohammad Aslani and Ali A. Alesheikh

August 2011

Some application of principal component analysis on Malaysian wind data

Understanding the meteorological characteristics helps in predicting the weather conditions; for example, the open burning by local farmers in the South East Asia caused adverse weather conditions in which hazardous haze affect the health conditions of the population. By looking at the multivariate weather variables such as wind speed, relative humidity, pressure, temperature at dew, temperature at dry, geo-potential...

Author(s): F. Hussain, Y. Z. Zubairi and A. G. Hussin

August 2011

Service oriented architecture and advancement of maintenance management information systems: A review

Global competitive environment among enterprises requires efficient business interactions with external and internal entities in companies. Maintenance management systems are one of the critical business units in companies that play a key role in reducing the downtime of machinery and equipment. Therefore, the maintenance management interactions need to be optimized. The new era of information technology lead to apply...

Author(s): M. Shareghi and A. A. Faieza

August 2011

An experimental investigation on effects of methanol blended diesel fuels to engine performance and emissions of a diesel engine

Considering strict restrictions on exhaust emissions of newly produced diesel engines, in this study, the effects of methanol and diesel fuel blends on compression ignition engine performance and exhaust emissions of a four cylinder, four stroke, direct injection, turbocharged diesel engine were experimentally investigated. Methanol-blended diesel fuels were ranged from 0 to 15% volumetric methanol content with an...

Author(s): Murat CINIVIZ, Hüseyin KÖSE, Eyüb CANLI and Özgür SOLMAZ

August 2011

Fatigue properties of ALTiN and TiN-coated high speed steels (HSS) steels

Wear of equipments limits usage life of machine parts. For this reason, coating technologies obtained from vapour phase occupy an important place in industrial applications. Coating obtained in this way has a wide usage area because it is not related directly to property of main materials to be covered. In physical vapour deposition (PVD) method, coating material is transmitted to surface in atomic, molecular or ionic...

Author(s): Cenk MISIRLI, Mumin SAHIN and Murat DINÇ

August 2011

Statistical analysis and projection of wood veneer industry in Turkey: 2007 - 2021

While development and change of the social life in recent years has noticeably increased demand for forest products, the production, export and import of the forest products accordingly changed in terms of quantity and quality as well. This change have, of course, transformed the forest products economic sector to a more dynamic structure, ensuring it find itself a place in the leading ranks among other sectors. In this...

Author(s): Yildiz Cabuk, Selman Karayilmazlar, Alper Aytekin and Rifat Kurt

August 2011

Assessment of a trial electromechanical delay in patients with mitral valve prolapse

Atrial arrhythmias are seen frequently in symptomatic patients with mitral valve prolapse (MVP). The purpose of our study was to evaluate whether the atrial electromechanical delay (AEMD) measured by tissue Doppler imaging (TDI) is prolonged in patients with MVP. A total of 40 patients with MVP (16 males/24 females, 33.4 ± 6.1 years), and 40 controls (18 males/22 females, 34.2 ± 4.2 years) were...

Author(s): Nusret Acikgoz, Julide Yagmur, Necip Ermis, Mehmet Cansel, Halil Atas, Hakan Tasolar, Hasan Pekdemir and  Ramazan Ozdemir

August 2011

Finding the stability boundary values in electrical power systems by using the particle swarm optimization algorithm

The critical values of a power system are the limit values of its highest active power, voltage amplitude, and the angles of the busses for its voltage stability. In this research, the particle swarm optimization (PSO) algorithm was examined to determine the critical values in electrical power systems. We first determined the critical values using the Jacabian matrix obtained with the load flowing analysis,...

Author(s): O. Kandara, A. Ozturk, S. Tosun and M. A. Yalcin

August 2011

Anti-ulcerogenic activity of Typhonium flagelliforme aqueous leaf extract against ethanol-induced gastric mucosal injury in rats

Typhonium flagelliforme (Araceae) is an indigenous medicinal plant of Malaysiawhich is endowed with curative properties against a variety of illness including injuries, oedema, coughs, pulmonary ailments, bleeding and cancer. In this study,T. flagelliforme aqueous leaf extract was used to investigate its gastroprotective effect in adult Sprague Dawley rats which were divided into four...

Author(s): D. A. A. Bardi, M. A. Sarah Khan, S. Z. Sabri, F. A. Kadir, A. A. Mahmood, A. A. Zahra, S. M. Suzy, N. Al-Hanhana and A. Al-Magrami

August 2011

An integral system for automated cutting tool selection

The importance of cutting tools in production systems demands modern approach to their selection. Automation of tool selection can significantly enhance the efficiency of process planning. Presented in this paper is a development of a geometry-based and feature-based system for automated selection of cutting tools. The developed system represents an integral solution, since, besides cutting tool selection, it allows...

Author(s): Gordana Ostojic, Branko Tadic, Ognjan Luzanin, Stevan Stankovski, Djordje Vukelic, Igor Budak and Ljubomir Miladinovic

August 2011

A fuzzy-based performance-enhancing input selection technique for network-on-chip

The performance of network-on-chip (NOC) largely depends on the underlying routing techniques. A routing technique has two constituencies: output selection and input selection. This paper focuses on the improvement of input selection part. Two traditional input selections have been used in NOC, first-come-first-served (FCFS) input selection and Round-Robin input selection. Also, recently a contention-aware input...

Author(s): Ebrahim Behrouzian Nejad, Ahmad Khademzadeh, Kambiz Badie and Amir Masoud Rahmani

August 2011

Review of interference avoidance schemes in femtocell networks

Femtocell is a solution to increase the system capacity and coverage to meet the high demand of the next generation of services on broadband wireless access.However, the deployment of a new femtocell layer may have an undesired impact on the performance of the macrocell layer. The allocation of spectrum resources and the avoidance of electromagnetic interference are some of the more urgent challenges that operators face...

Author(s): Sabarina Ismail, Chee Kyun Ng, Nor Kamariah Noordin, Aduwati Sali and Borhanuddin Mohd Ali

August 2011

Determination of velocity dispersion profiles in open canals using different interpolation methods

The purpose of this study was to estimate co-speed curves (velocity dispersion profiles) in the cross-section of an open canal using point flow velocities by 10 different interpolation methods and to determine the best of these by comparing them with each other. Firstly, velocity dispersion profiles were obtained for two trapezoid section concrete-lined irrigation canals according to measured point velocity...

Author(s): Halil Baki ÜNAL and Emrah ÖZCAKAL

August 2011

Nonlinear finite element analysis of reinforced concrete plates modeled by layered composites

In this study, finite elements method (FEM) was used for the nonlinear analysis of reinforced concrete (R/C) plates under incremental loading up to failure load. Layered composite material model (LCMM) was used for the modeling of reinforced concrete plates. This approach differs from the other approaches since it considers the effect of tensile stiffness of concrete between cracks and uses a criterion based on the...

Author(s): Rifat SEZER and Muhammed D. TEKIN

August 2011

Tα146-162-iMDC in intervention of experimental autoimmune myasthenia graves in terms of B cell activation

To explore the mechanism of Tα146-162-iMDC in intervention of experimental autoimmune myasthenia gravis (EAMG) in terms of B cell activation through use of dendritic cells pulsed with Talpha146-162 in EAMG. Thirty-four healthy male C57BL/6J mice aged 6 to 8 weeks were randomized into model group (Group A), intervention group (Group B) and control group (Group C). Dendritic cells were cultured and loaded with...

Author(s): Rong Wang, Huan Yang, Bo Xiao, Xiaoxiao Duan and Kongliang Shu

August 2011

An experimental investigation of an improved incline solar water desalination system in Famagusta

This study investigated the performance of an improved incline solar water desalination (ISWD) system under the influence of two different weather conditions (winter and summer seasons) in Famagusta, Northern Cyprus. The experimental investigation studied the effects of solar radiation intensity, wick on the plate absorber and the bare plate absorber on the daily production and efficiency of the ISWD system. The results...

Author(s): O. Phillips Agboola and F. Egelioglu

August 2011

UTCP: Unordered transmission control protocol (TCP) for high throughput bulk data transfer

Transmission Control Protocol (TCP), which offers a reliable, in-order packet delivery service, is at the heart of many Internet protocols including File Transfer Protocol (FTP), Hypertext Transfer Protocol (HTTP). It is a known phenomenon that in-order nature of TCP causes what is known as a head-of-line blocking problem. That is, when the first packet within a TCP sender window is lost, the window will not move...

Author(s): Ihsan Gunes and Cuneyt Akinlar

August 2011

Probabilistic estimation of structural loads and responses with finite element procedure

In this study, structural loads and responses of multistory frames are evaluated in terms of their variations by using stochastic process. For this purpose some algorithms are developed to simulate probabilistic loads and to obtain responses. Live and wind loads containing large variability are simulated as external loads. Structural analyses are realized by considering deterministic methods by finite element technique...

Author(s): Fevzi SarıtaÅŸ, Holger Schmidt and Carl A. Graubner

August 2011

Utilization of fly ash linear materials as an adsorbent of hazardous chemical compounds

In Japan, due to the public resistance of the nuclear power plants, the general trend is to generate power by using the coal. This means that huge amount of fly ash will be accumulated in the power plants due to the lack of safe reclamation sites. Accordingly, this paper presents an experimental study that evaluates the adsorption characteristics of fly ash when used as a filter medium in places where the groundwater is...

Author(s): Monther A. Abdelhadi, Tanabashi Yoshihiko, Nafeth A. Abdelhadi and Mohammed Matouq