Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2747

Table of Content: 9 November 2011; 6(26)

November 2011

Redundant manipulators kinematics inversion

  A robotic system is kinematically redundant when it possesses more degrees of freedom than those required to execute a given task. This paper reviews the well-known methods used to find the inverse kinematics of redundant manipulators. Because redundant manipulators have infinite solutions for their inverse kinematics, therefore the conventional method that was used to calculate the inverse kinematics of...

Author(s):   Samer Yahya, M. Moghavvemi and Haider A. F. Mohamed    

November 2011

Effects of nicotine and Gelam honey on testis parameters and sperm qualities of juvenile rats

  The present study aimed to elucidate the effects of nicotine and Gelam honey on testis parameters and sperm qualities of rats. Sprague Dawley rats (4 to 5 weeks old) were divided into 4 groups with 7 rats for each group. Rats of the honey (H) and honey-control (HC) groups were force-fed daily with 1.0 ml/100 g body weight of Gelam honey and normal saline (0.9%), respectively. Rats in the nicotine (N)...

Author(s):   Asiyah, H. A., Syazana, N. S., Hashida, N. H., Durriyyah Sharifah, H. A.and Kamaruddin, M. Y.    

November 2011

Effects of geometric parameters on failure behavior in joined-rivet and single lap laminated composite plate under bending moment

  In this study, failure behavior of single lap composite plate fixed by means of both rivets and adhesive bonding was investigated using three-point bending test. Rivet connections were made on specimens at different geometrical intervals. Force-displacement graph were drawn. The composites used were made of glass epoxy materials with four plies and 0° layer angle. An FM73 film layered binder was used for...

Author(s):   Sefa  ERGUN, Åžükrü KARAKAYA, A. Rıza TARAKÇILAR, Emin ERGUN    

November 2011

Clinical presentation and the efficacy of antiepileptic therapy in the patients with partial and generalized epilepsy

  Epilepsy is an abnormal recurrent disease, resulting from various disorders of central nervous system. In this study, we aimed to compare the patients in terms of therapeutic efficiency. We enrolled a total of 106 patients in the study and of them, 45 were male and 61 were female, aged between 2 to 52 years. Of these patients, 69 (65%) had partial and 37 (35%) had generalized seizures. Seventy three patients...

Author(s):   Refah Sayin, Temel Tombul, Omer Anlar and  Hüseyin Caksen    

November 2011

Collisions and linkages between forestry and environmental policies in South East Europe (SEE) region

  The paper presents results from regional surveys and case studies conducted in five countries of South East Europe (SEE). The main aim of the study was to identify the most pronounced forest-related conflicts in the region (Albania, Bosnia and Herzegovina, Croatia, Macedonia and Serbia) at the policy and management levels and in terms of their type, dimensions as well as actors and their attitudes. A...

Author(s):       Radovan Nevenic, Ljubinko Rakonjac, Zoran Poduska and Renata Gagic    

November 2011

Influence of environmental parameters on shrimp post-larvae in the Sungai Pulai seagrass beds of Johor Strait, Peninsular Malaysia

  Monthly sampling for shrimp post-larvae was conducted between April 2007 and March 2008 from the seagrass beds of Sungai Pulai Estuary, Johor, Peninsular Malaysia. Samples were collected from sub-surface using a bongo net equipped with a flow meter. In situ environmental parameters such as water temperature, dissolved oxygen, pH, salinity, total dissolved solid and conductivity were recorded during...

Author(s):   A. Arshad, R. Ara, S. M. N. Amin, M. Effendi, Zaidi C. C. and Mazlan A. G.    

November 2011

To determine the possible roles of two essential trace elements and ascorbic acid concerning amyloidal beta-sheet formation in diabetes mellitus

  Amylin is a peptide hormone that is made and co-secreted along with insulin. Human amylin is the main component of amyloid beta-sheet found in the pancreas of majority of diabetic patients. Amyloidogenesis causes destruction of pancreatic β-cells. The subsequent lack of insulin leads to increased blood and urine glucose.In this article, the fluorimetric assay was used to examine the role of...

Author(s):   Seyyed Mehdi Mirhashemi and Mohammad-Hosein Aarabi      

November 2011

The effects of linear and non-linear loads on three-phase transformers supplied from different sources

  In this study a new approach for the calculation of harmonic transformer parameters by making use of equivalent circuit model of one phase transformers is put forth. With this aim in mind, a three-phase core type transformer from 4 kVA, 400/230 V, 50 Hz, Yy0 connection group was used. To supply transformers voltage sources with sinusoidal and non-sinusoidal wave shapes were used. The transformers supplied on...

Author(s): Mustafa YAÄžCI and Abdullah ÜRKMEZ

November 2011

An efficient implementation of switching median filter with boundary discriminative noise detection for image corrupted by impulse noise

  Switching Median Filter with Boundary Discriminative Noise Detection (BDND) is one of the useful methods that are capable to restore digital images which have been extremely corrupted by universal impulse noise. Following the fundamental framework of the switching median filter, the construction of BDND can be divided into two stages. The first stage classifies the pixels into either “noise” or...

Author(s):   Haidi Ibrahim, Theam Foo Ng and Sin Hong Teoh    

November 2011

Preventive maintenance model with FMEA and Monte Carlo simulation for the key equipment in semiconductor foundries

  Semiconductor foundries have entered an era of 12-inch wafers and over five hundred production processes involved in manufacturing and measurement. In order to stabilize equipment and reduce variations in processes, an effective equipment maintenance model is required. This study thus aimed to establish a model to maintain the key equipment in a semiconductor factory, based on its history of preventative...

Author(s):   Tsu-Ming Yeh and Jia-Jeng Sun    

November 2011

Role of fluorescence in situ hybridization in the diagnosis of urothelial cancer in asymptomatic hematuria patients

  The present study aimed to investigate the feasibility and validity of fluorescence in situ hybridization (FISH) in the diagnosis of urothelial cancer (UC) in asymptomatic hematuria patients. Probes to the pericentromeric regions of chromosomes 3, 7 and 17, and to the 9p21 band were used in FISH at detecting UC in 53 hematuria patients negative on imaging, cystoscopy and cytology but highly...

Author(s):   Peng Wang, Feng-shuo Jin, jin Ye, Ke-qin Zhang, Gang Wu, Yao Zhang and Yan-feng Li    

November 2011

Patient satisfaction of in-patients treated in a university hospital in Turkey

  Structural equation modelling (SEM) is a statistical method that emerged as a result of assembling and synthezing the confirmative factor analysis, path analysis and regression analysis in a model. In this respect, factor, canonic correlation, multivariate variance and covariance, multi regression and path analysis are also considered the special conditions of SEM. Additionally, the most important difference...

Author(s):   H.Hatice Ozkoc and M. Vedat Pazarlioglu    

November 2011

Learning morphosyntactic patterns for multiword term extraction

  The identification of valid terms in any domain is fundamental to its computerization. For this reason, in this paper we present a method for obtaining automated morphosyntactic patterns, which will help researchers obtain valid terms from the proposed patterns, in order to build quality ontologies for the translation from one language to another, or to find relevant terms in short sentences, which can be...

Author(s):   José Luis Ochoa, Ángela Almela, Maria Luisa Hernández-Alcaraz and Rafael Valencia-García    

November 2011

Low-frequency low-intensity ultrasound with contrast agent for the treatment of subcutaneous tumors in mic

  To determine the effects of ultrasound exposure in the presence of microbubble contrast agent (SonoVue) on the subcutaneous tumor of nude mice. Nude mice bearing subcutaneous tumor were prepared and treated with ultrasound. These animals were divided into three groups: control group (without treatment), low-frequency ultrasound group (US) and low-frequency ultrasound  contrast agent group...

Author(s):   Zhi-Yong Shen and Bing Hu    

November 2011

The optimization model for long-term operation of hydrothermal power plants

  Coordinating the generation plan of hydrothermal power plants in a long-term period is extremely important in generation scheduling system of hydrothermal power plants. Regarding the importance of the issue, a method for optimizing the long-term operation of a combined system of hydroelectric and thermal power plants is presented in this research, in which the main system parameters, including water inlet to...

Author(s):   Alireza Pilpayeh and Alireza Nikbakht Shahbazi    

November 2011

The effects of hydromethanolic extract of saffron (Crocus sativus) on some biochemical parameters of serum blood in constant darkness and light conditions in healthy male rats

  The purpose of the present investigation was to determine the effects of hydromethanolic extract of saffron on changes of serum cholesterol, glucose and insulin levels in constant darkness and light conditions in healthy male rats. In this study, healthy male rats (n = 30) were divided into 3 groups of tens and kept at various light/dark conditions: Control + saffron 12:12 light/dark (LDS); constant...

Author(s):   Ali Arasteh, Ali Aliyev, Saeed Khamnei, Abbas Delazar, Mehran Mesgari, Yousef Mehmannavaz and Maliheh Hamzehzadeh Azar    

November 2011

Vibration analysis of 19 degrees of freedom rail vehicle

  The present paper examines the vibrations of a rail vehicle system by forming full vehicle model with nineteen-degree-of-freedom (19-DOF). Considering the spring and suspension forces the related mathematical equations are derived while taking irregularities as completely sinusoidal. Translations and rotations of rail vehicle car body, front and rear bogies are showed regarding the critical speeds including...

Author(s):   Ferhat Dikmen, Meral Bayraktar and Rahmi Guclu    

November 2011

Artificial neural network for structural behavior prediction of RC one-way slab strengthened by CFRP

  In this project, 6 Reinforced Concrete (RC) slabs with various length and thickness of carbon fiber reinforced polymer (CFRP) in comparison with the plain RC slab have been used to generate Artificial Neural Networks (ANNs) for structural behavior prediction. The slab dimension was 1800 × 400 × 120 mm and the length of the CFRP was 700, 1100 and 1500 mm in two different cross section area of 60...

Author(s):   S. V. Razavi, M. H. Ayazi and P. Mohammadi    

November 2011

A review on wireless sensor networks routing protocol: Challenge in energy perspective

  Wireless sensor networks (WSNs) technology consists of a number of sensor nodes that are dispersed in a geographically distributed area usually for monitoring purposes. The widespread applications of WSN have fueled the emergence and acceptance of this technology as a frontrunner. However, the success of the wireless sensor network applications highly depends on the reliable communication among the sensor...

Author(s):   Ismail Ahmedy, Md. Asri Ngadi, Syaril Nizam Omar and Junaid Chaudhry