Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2768

Table of Content: 26 August; 6(17)

August 2011

The mechanism of reproduction and hormonal function in finfish species: A review

The number of aquatic species currently under domestication efforts is rising rapidly, due to the development of commercial aquaculture. For domestication and the establishment of a sustainable aquaculture industry, the control reproduction processes of fish in captivity, and to acquire high quality seed, is necessary. The fish reproductive cycle is separated in gametogenesis (of growth) and oocyte maturation and...

Author(s): Mehdi Yousefian and Seyed Ehsan Mousavi

August 2011

Use of the internet by breast cancer patients

This article reports on the literature associated with Internet use by breast cancer patients. Reviewing the literature indicates that breast cancer patients can use the Internet as a source of information, social support, shared experience, empowerment, positive role models, professional support and patient advocacy. Also, studies reveal that a number of factors such as patients’ personal characteristics,...

Author(s): Mojgan Afshari, Muhammad Faizal A. Ghani and Norfariza Mohd Radzi

August 2011

Nutritional status of forage plants and their use by elephant in Waza national park, Cameroon

We studied the utilization pattern of wild plant species by elephants in relation to their nutritive values in order to provide insight into crop raiding events by the animal in the Waza region. Elephants were selective for food plants in the wilderness. Out of 45 recorded plant species, only 20 plant species were found to be utilized either fully or partially as evident by branch breaking, debarking, and...

Author(s): Désiré Foguekem, Martin Ngankam Tchamba, Legrand Nono Gonwouo, Pierre Ngassam and Mike Loomis

August 2011

Genetic programming approach for testing credit risk box method

In this paper, Genetic Programming (GP) technique is applied to the empirical analysis of a new geometric approach of credit risk, financial ratios and bankruptcy prediction. Utilizing financial ratios for prediction of corporate bankruptcy and identification of firms’ impending failure is indeed desirable for investors, creditors, borrowing firms, and governments. This paper presents new geometric technique for...

Author(s): Alireza Bahiraie, Noor Akma bt Ibrahim and A. K. M. Azhar

August 2011

Effect of pressure on burst and leakage in drinking water network

Water distribution systems and failure to prevent the formation of burst are studied. Bursts occur in distribution systems because of poor workmanship and material defects, traffic load, rupture from earthquake, soil corrosion and high pressure. Planning stage creates negative effects due to pressure. To eliminate pressure on the network, average of 30 to 60 and 20 to 80 mws should be applied critically. However, in...

Author(s): Recep KILIC, Huseyin CINAL, Nurtac OGLENI

August 2011

Suppressing dissolved hydrogen sulfide in a sewer network using chemical methods

Corrosion process and odor emission concerns caused by H2S are a constant focus for many sewage system municipalities, usually from the first day of system operation. This study investigates the effect of several chemicals on prohibition of H2S generation in sewage, where reagents were applied either individually or in combinations. Various concentrations of calcium peroxide, calcium hypochlorite, magnesium hydroxide,...

Author(s): Faridah Othman, Shahram MortezaNia, Shahin Ghafari, and Soenita Hashim

August 2011

Variability of CODG TEC and IRI 2001 total electron content (TEC) during IHY campaign period (21 March to 16 April 2008) at Niamey under different geomagnetic activity conditions

IRI 2001 model prediction is compared to custom orthotic design group total electron content (CODG TEC) maps prediction at Niamey during several geomagnetic (quiet, fluctuating and shock days) conditions for the period of IHY campaign. Independently of geomagnetic conditions, the qualitative comparison between CODG TEC maps and IRI 2001 TEC shows the overestimation of IRI 2001 model. The overestimation of...

Author(s): Frédéric Ouattara and Rolland Fleury

August 2011

Effect of different organic fertilizers on yield and fruit quality of ındeterminate tomato (Lycopersicon esculentum)

The purpose of this study was to evaluate the effects of different organic fertilizers on yield and fruit qualities of indeterminate tomato. Influences of different organic and inorganic fertilizers on yields and fruit qualitiy of tomato were compared during 2006 and 2007 growing periods under field conditions. In 2006 growing period, organic fertilizes used were Ormin K (250 kg/ha before planting;  30 kg/ha after...

Author(s): Dürdane YANAR, Naif GEBOLOÄžLU, Yusuf YANAR, Mine AYDIN and Perihan ÇAKMAK

August 2011

Design of permanent greenhouse structure by pultruded glass reinforced plastic

Research activities have been taking on place in many ports of the world to develop or produce new greenhouse construction materials in order to grow more economic agricultural products. One of the new technological materials is the glass fiber reinforced plastic (GFRP) materials. GFRP materials are basically constituted of resin and continuous or chopped fiber and they are manufactured by using various manufacturing...

Author(s): Ali Saribiyik and Mehmet Saribiyik

August 2011

ITTDG: Integrated T-way test data generation strategy for interaction testing

In the last 20 years, software has grown tremendously in terms of size (that is, line of codes (LOCs), and functionalities). With the increase in LOCs and functionalities, more and more unwanted interactions amongst software systems, hardware components, and operating systems are to be expected, rendering increased possibility of faults. While traditional static and dynamic testing strategies are useful for fault...

Author(s): Rozmie R. Othman and Kamal Z. Zamli

August 2011

An integrated graphical user interface for pavement deterioration modeling

Flexible pavements deteriorate under traffic loads and climate effects. In this study, an integrated graphical user interface was developed to model, analyze and predict future pavement deterioration in highways. State highways in Turkey were chosen as a case study. Alarge database was built and connected to a user interface. This database included climate data obtained from the State Meteorological Service, traffic...

Author(s): Metehan Incegul and Murat Ergun

August 2011

The alteration effects of environmental conditions on ancient Selçuk bricks used in historical buildings of Konya, Central Turkey

In this study the damaging effects of environmental conditions on ancient bricks that have survived from the time of the Seljuk Empire were investigated. A systematic chemical examination of the weathered bricks and their crusts from the Aksinne small mosque in Konya, Turkey, was performed on collected samples, both in situ and in a laboratory. This study shows that ancient bricks in different colors are...

Author(s): Mehmet Emin BaÅŸar

August 2011

Effects of tillage on bulk density and soil moisture content in wheat-fallow rotation under dry conditions

In the arid and semi arid region of Iran, conventional tillage is mainly used(Moldboard plowing followed by two disc harrowing) for wheat production. Such a tillage system requires a high energy input and may also cause water loss and long-term soil physical degradation. This field study was conducted under dry conditions to determine whether or not the reduced tillage systems altered the bulk density and soil moisture...

Author(s): Nosrat Allah Heidarpur, Moslem Abdipur,  and Behroz Vaezi

August 2011

Modelling of physical slot parameters with Artificial Neural Networks for U-slot rectangular microstrip patch antennas

In this study, slot length and slot width physical parameters that calculated theoretically before on U-slot rectangular microstrip antennas are calculated with two different ‘artificial neural network’ models then using experimental slot parameters in the literature. The aim of the first model is presenting an approach for calculation of U-slot physical parameters obtained theoretically, with...

Author(s): S. Sinan Gultekin and Dilek Uzer

August 2011

Factors of land use/cover change: A case study from Turkey

Land use/cover change impacts ecosystem services and functions such as forest health, biodiversity, and water production. Monitoring and assessing land use/cover changes provides an effective and accurate evaluation of human impact on the forest ecosystems. This study aims to determine spatial and temporal changes in land use/cover at a particular time period in a typical forest ecosystem of Turkey using geographical...

Author(s): Fatih SIVRIKAYA, Günay ÇAKIR and   Abdullah Emin AKAY

August 2011

The effects of water stress, manure and chemical fertilizer on grain yield and grain nutrient content in barley

Barley is a cool-weather cereal grain primarily produced on dryland farms in Sistan region. In order to study the effect of different proportions of manure and chemical fertilizer and water stress on grain yield and grain nutrient content in barley an experiment was conducted as split plot randomized complete block design with three replications in research field of Zabol University, 2009. Water stress treatments...

Author(s): Mahdi Babaeian, Yasser Esmaeilian, Abolfazl Tavassoli, Ahmad Asgharzade and Manan Sadeghi

August 2011

A filter based fisher g-test approach for periodicity detection in time series analysis

Periodicity is an interesting property of many time series data sets. A period can be defined as a self repeating pattern. This pattern provides useful information about the inherent structure in cyclic data set. In this paper, a filter based Fisher g-test approach is introduced. The filtering approach is based on the singular spectrum analysis. The power and running time of the proposed filter based approach are...

Author(s): Masoud Yarmohammadi

August 2011

Relationship of HPVL1 and p16 expression with different cervical lesions

p16 is a tumor suppressor protein and also a cyclin-dependent kinase inhibitor and HPV-L1 (L1) is a capsidic protein that is expressed in the early, productive phase of cervical carcinogenesis. To provide evidence for the evaluation of endometrial intraepithelial neoplasia (CIN), the expressions of p16 and HPVL1 in different cervical diseases were determined and their relationship was explored....

Author(s): Haiying Wu, Huirong Shi and Lingfei Kong

August 2011

Localized job scheduling system using cooperative and system-centric scheduling policy for market-oriented grids

In grid scheduling systems, a major challenge is to manage the consumers’ job based on their Quality of Service (QoS) and provider nodes’ satisfaction. Most of the capable job scheduling polices operate on the basis of meta-scheduling systems that may result in a complex management with overcrowding probability in market-oriented grids. Therefore, the need for an efficient job scheduling algorithm based...

Author(s): Asgarali Bouyer, Abdul Hanan Abdullah and Mohammad hoseinMokhtari

August 2011

Place recognition using semantic concepts of visual words

Applying the ‘bag-of-visual-words’ has recently become popular for image understanding. Although, using the histogram of visual words suffers the problem when the patches of an image faced with similar appearance corresponding to differentiate semantic concepts and vice versa. Due to varying views and dynamic objects, this problem is more complicated in the mobile robot applications such as global...

Author(s): V. Rostami, Abd Rahman Ramli, Khairulmizam Samsudin and M. Iqbal Saripan

August 2011

Effect of zinc toxicity on liver histology of Nile tilapia, Oreochromis niloticus

In the present study the toxic effects of zinc (Zn) on the liver structure of Nile tilapia,Oreochromis niloticus were investigated. Additionally, we estimated whether Zn concentration and exposure period influence the degree and nature of histological changes in the liver of exposed fish. Two hundred and forty fish (the average weight was 24.30± 2.85 g) were distributed randomly in twenty four glass aquaria...

Author(s): Abdel-Warith, A. A., Younis, E. M., Al-Asgah, N. A., and Wahbi, O. M.

August 2011

Dynamic observation of penile hemodynamic change in patients with vasculogenic erectile dysfunction after prostaglandin E1 treatment

To dynamically observe the hemodynamic features in different subtypes of vasculogenic ED after intracavernous injection of prostaglandin E1 (PGE1). 358 of ED patients were involved in this study, including 119 psychogenic ED, 75 arteriogenic ED, 78 venogenic ED, 54 mingle vasculogenic ED and 32 other causes ED. For all of these ED patients, intracavernous injection of 10 μg PGE1 was used to induce penile...

Author(s): Yuxin Tang, Xiaoliang Guo, Xianzhen Jiang, Leye He and Jiaming Wen

August 2011

Effects of partial rootzone drying and conventional deficit irrigation on yield and quality parameters of “Williams Pride” apple cultivar drafted on M9 rootstock

Fruit yield and quality of 4 year old “Williams Pride” apple trees on M9 rootstock under partial rootzone drying (PRD) were studied over 2 years. Irrigation treatments were control irrigation (CI), conventional deficit irrigation (DI), and two different partial rootzone drying (PRDI and PRDII). In PRD, irrigation water was applied alternately on one side of the tree’s rows and the other side was not...

Author(s): Ulas Senyigit and Fatmagul Ozge Ozdemir

August 2011

Conceptual framework and research method for personality traits and sales force automation usage

This study began with an extensive literature review combined with a quantitative study and personality trait testing and involves the medical sales representatives of several multinational pharmaceutical companies which are members of the Taiwan Pharmaceutical Marketing and Management Association (TPMMA). Their sales forces range from 50 to 200 and all used automation systems in their daily sales operation. These...

Author(s): Cheng-Wu Chen, Chun-Pin Tseng, King-Ling Lee and Han-Chung Yang

August 2011

An investigation on hybrid studio format applied in introductory calculus-based physics

The purpose of this study is to ascertain the performances and perceptions of the students in Hybrid Studio Format (HSF). This format retains the large lecture component but combines recitation and laboratory instruction into Studio Physics. In this research, ‘problem solving strategy’ and ‘attitudes toward problem solving surveys’ were administered by pre/post-test to evaluate students’...

Author(s): Tolga Gok

August 2011

Phenolic compounds and physiochemical analysis of Physalis ixocarpa genotypes

The genotypic variations on physico-chemical characteristics of purple tomatillo genotypes were evaluated. The result showed that the total phenolic contents were 9.65 ± 0.12, 7.75 ± 0.14 and 8.24 ± 0.14 mg GAE/g fresh weight in 8 to 10 ICTS-UDG, 11 to 40 ICTS-UDG and 14 to 130 ICTS-UDG genotypes, respectively. The anthocyanins content was highest in the genotypes 14 to 130 ICTS-UDG and 17 to 197...

Author(s): Daniel González-Mendoza, Davinia Ascencio-Martinez, Angel  Hau Poox, Vianey Mendez-Trujillo, Onecimo Grimaldo-Juarez, José F. Santiaguillo Hernández, Lourdes Cervantes Diaz and Silvia Monica Aviles Marin

August 2011

The preschool education web-sites and nutrition education activities: An assessment by prospective teachers

The aim of this study is to determine how prospective preschool teachers evaluate preschool education websites and nutrition activities on them. The qualitative research methods were used in this study. The data was obtained by the evaluation of 20 websites using “website evaluation form” via document analysis technique by fourth-year prospective teachers (n=20) at Vocational Education Faculty. As a...

Author(s): Nazan AktaÅŸ, D. Esra Angın and Özlem KarakuÅŸ

August 2011

The effect of welding parameters on the mechanical and microstructural properties of friction stir welded dissimilar AA 3003-H24 and 2124/SiC/25p-T4 alloy joints

Assemblies consisting of aluminum and particle reinforced aluminum composite alloys have wide spread applications in construction and automotive industries. For a successful use of such dissimilar joints, the welds must have sufficient strength and formability. In the present study, 3003-H24 aluminum alloy and 2124/SiC/25p-T4 composite plates were successfully friction stir butt joined by offsetting the high strength...

Author(s): Yahya BOZKURT and Serdal DUMAN