Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2729

Table of Content: 4 July 2010; 5(13)

July 2010

Optimizing N relations join queries by genetic algorithm

An important subject in optimizing queries at N relations join is the huge cost time. In web-based systems, the most important problem is obtaining answer at a minimum time. At the rank aware queries, suppliant does not need all possible answers rather having top K answers is enough. Although obtaining top K answers is time consuming in huge databases, in this paper we introduce a new concept at obtaining suitable K...

Author(s): Najmeh Danesh, Hossein Shirgahi and Homayun Motameni

  • Article Number: B295A4E19357

July 2010

Drilling rate prediction using an innovative soft computing approach

An accurate approach for drilling rate prediction using a new soft computing approach is introduced in this paper. Drilling rate prediction is an important issue due to its crucial role in minimizing drilling cost. However, a large number of unforeseen factors and events influence the drilling rate and make it a complex and stochastic process and consequently difficult to predict. Many different techniques have been...

Author(s): Hamidreza Moradi, Mohammad Hasan Bahari, Mohammad Bagher Naghibi Sistani and Aboozar Bahari

  • Article Number: 632489419381

July 2010

Confidence intervals estimation for survival function in Weibull proportional hazards regression based on censored survival time data

n accurate approach for drilling rate prediction using a new soft computing approach is introduced in this paper. Drilling rate prediction is an important issue due to its crucial role in minimizing drilling cost. However, a large number of unforeseen factors and events influence the drilling rate and make it a complex and stochastic process and consequently difficult to predict. Many different techniques have been...

Author(s): Kamil Alakuş

  • Article Number: FD2A61F19400

July 2010

Seismic microzonation studies in Sisli, Istanbul, Turkey

The main purpose of this study is to provide an application of seismic microzonation at small scales. For the study area, the probabilistic seismic hazard analysis was determined by using Poisson probabilistic approaches. The hazard gives the probability that a given level of acceleration will be exceeded (15%) in a given time period (50 years). By using deterministic seismic hazard analysis, the magnitudes were...

Author(s): Ferhat Ozcep, Savas Karabulut, Burcu Korkmaz and Halil Zarif

  • Article Number: 160613319427

July 2010

Seismic slope stability analysis: A case study of Gurpinar, Istanbul

Slope failures triggered by earthquakes are one of the most important soil problems.  In this study, dynamic (earthquake) slope stability analysis was carried out in Gurpınar area. For this aim, in situ tests (SPT) were carried out and laboratory samples were obtained from 6 boreholes (max. depth 50m) to determine soil classification and strength characteristics. Moreover, geophysical studies (seismic...

Author(s): Ferhat Ozcep, Engin Erol, Fatih Saraçoğlu and Mustafa Haliloğlu

  • Article Number: BF0B34E19455

July 2010

Relationship between insulin resistance and adiponectin expression in a rat model of polycystic ovary syndrome

Our study investigated the relationship between insulin resistance (IR) and adiponectin expression in the adipose tissue of rat polycystic ovarian syndrome (PCOS) model. Female rats were divided into two equal groups according to their age, size and vitality. In Group 1, rats received subcutaneous injections of DHEA (once daily) for 20 consecutive days to induce PCOS, and those in Group 2 were...

Author(s): Yu-xia Wang, Xing-mei Xie, Ming Dai and Wei-jie Zhu

  • Article Number: 81826DD19475

July 2010

A novel rat model of 1/4 partial nephrectomy and its application in ischemia-reperfusion research in residual kidney

This study established a new rat model of 1/4 partial nephrectomy for research on ischemia-reperfusion injury in residual kidney. Thirty healthy Sprague-Dawley rats were intraperitoneally anesthetized by pentobarbital sodium. A lumbar oblique incision was made, and then the right renal pedicle was isolated and clamped by a smooth microclip. The kidney size was measured and the upper pole of  the right...

Author(s): Qianglin Duan, Guangchun Wang and Junhua Zheng

  • Article Number: C2F87C819502

July 2010

Correlation between Schmidt Hammer and destructive compressions testing for concretes in existing buildings

In this study, a relationship is determined and correlated between non-destructive testing (NDT) named as Schmidt rebound hammer test and concrete destructive compression test. The Schmidt rebound hammer is principally a surface hardness tester with an apparent theoretical relationship between the strength of concrete and the rebound number of the hammer. In order to calibrate the Schmidt Hammer with the various-aged...

Author(s): Ferhat Aydin and Mehmet Saribiyik

  • Article Number: 66AAB1819518

July 2010

Genetic population structure of Ovalipes punctatus revealed by AFLP markers

The population genetic structure of sand crab, Ovalipes punctatus in the East China Sea and the Yellow Sea was analyzed using amplified fragment length polymorphism (AFLP). A total of 196 loci were detected by four primer combinations among 95 individuals collected from five locations, 117 of which were polymorphic (59.69%). The proportion of polymorphic loci and Nei’s genetic distances for five...

Author(s): Cun Gen Yu, Zhi Qiang Han, Ji Zheng, Li Jian Xue and Tian Xiang Gao,

  • Article Number: 4BFF3F919536

July 2010

Effect of pH and moisture content on endophytic colonization of maize roots

The effect of pH and moisture contents on microbial colonization of maize roots was studied. Roots of SWAN and TZSRY cultivars were subjected to different pH levels (3, 6.9, and 11) and moisture contents (MC) of (30, 70, and 100%) for 5 weeks. Highest bacterial population (2.36 - 3.70 x 109 cfu/g root) was observed at pH 11 with SWAN cultivar and least at pH 6.9 with TZSRY cultivar (1.24 - 1.62 x 109 cfu/g...

Author(s): T. O. Adejumo and O. O. Orole

  • Article Number: 157DAA319556

July 2010

An instrumented reinforced earth wall

Reinforced earth wall system has become very popular because of its aesthetic value and ease of construction. In order to optimize the design, it is important to understand its behavior during and after construction. This can be achieved either through field instrumentation or numerical simulation. In this paper, field instrumentation work carried out on a reinforced earth wall is described with the objective of...

Author(s): Faisal Ali and Lee Chee Hai    

  • Article Number: 7A099E619583

July 2010

Methylation of p14ARF and abnormal expression of p53 and mdm2 in colorectal cancer: Role and correlation

Methylation of p14ARF in 42 samples of colorectal cancer and matched adjacent normal tissues was evaluated by methylation-specific PCR (MSP) method. Expressions of p53 and mdm2 were detected by using the semi-quantitative RT-PCR. Protein expressions of p14ARF, p53 and mdm2 in the two groups were assessed with immunohistochemical staining. Research data were analyzed with Student’s t-test, chi-square test and...

Author(s):   Chaoliang Xiong, Jun Li, Lingxian Yan, Yuan Huang  

  • Article Number: 16DE2E919609

July 2010

Incidental finding of Mycoplasmas in developmental dysplasia of the hip and hip dislocation

A non-controlled prospective trial was carried out to investigate ultrastructure of acetabular roof and joint capsule by electron microscopy in dislocated developmental dysplasia of the hip (DDC). Nineteen randomly selected babies aged 18 months to 8 years and ten months, were operated on by a medial approach for open hip reduction between January and July 2006, obtaining biopsies at surgery. No healthy hips were opened...

Author(s): Antonio Redon-Tavera, Hilda Villegas-Castrejón, D. Oscar Isunza-Alonso, Antonio Rivera-Tapia and Saúl R. León Hernández

  • Article Number: 2490DF619631

July 2010

High maneuvering target-tracking based on strong tracking modified input estimation

When tracking a high maneuvering target, the sudden changes of target states may cause a serious decline or even divergence in the performance of the conventional modified input estimation (MIE) technique. Taking this into account, in this paper, strong tracking filter multiple fading factors are introduced in order to enhance the tracking performance of MIE for high maneuvering targets. As the...

Author(s): Jin-Long Yang and Hong-Bing Ji

  • Article Number: 9F70F9619650

July 2010

Expression of MUC2 and MUC5B in ethmoid sinus mucosa of patients with chronic rhinosinusitis

This study investigated the expression of MUC2 and MUC5B in the ethmoid sinus mucosa of patients with chronic rhinosinusitis (CRS). Immunohistochemistry and fluorescence quantitative reverse transcription polymerase chain reaction (RT-PCR) were performed to detect the expression of MUC2 and MUC5B in the ethmoid sinus mucosa of 32 patients with CRS and 7 control individuals. Immunohistochemistry confirmed the expression...

Author(s):   Huang Xue-Kun, Li Yuan, Ye Jin, Li Peng and Liu Hong    

  • Article Number: 69B16EC19672

July 2010

A case study of factors influencing employment satisfaction in a Thai life sciences research institute

The objective of this study was to find the level of employment satisfaction in a life sciences research institute staffed by a mix of academic and non-academic staff.  Both academic and non-academic staff members were included in the survey. The study population comprised 121 employees at the Institute of Science and Technology for Research and Development, Mahidol University. The instrument for gathering data was...

Author(s): Anchalee Nirachanon and Duncan R. Smith    

  • Article Number: B020E7019704

July 2010

Effect of upstream crest length on flow characteristics and discharge capacity of triangular labyrinth side weirs

A series of laboratory experiments were performed within this study in order to investigate the hydraulic characteristics and the discharge capacity of sharp-crested triangular labyrinth side weirs with various upstream crest lengths. To conduct the experiment series, twenty seven different labyrinth side weir models having triangular plan view that are manufactured from steel were tested in the laboratory flume. A...

Author(s): Nihat Kaya

  • Article Number: 8903D1419720

July 2010

GFRP bar element to strengthen timber connection systems

Timber is an excellent construction material with a strength-to-weight ratio comparable with steel and concrete. It is necessary to strengthen the timber, particularly in the weak joint places, in order to obtain both durability and originality. The aims of strengthening in the connecting places are to decrease the stress concentration, keep on the fibre continuity, and reduce disadvantages of connection element...

Author(s):   Mehmet Saribiyik and Tahir Akgül

  • Article Number: BC4496719741

July 2010

Does legislation cause externalities in timber selling? A case from Turkish timber market

This study aims to explain how legislation causes market failure by creating problems of externality in forest management in Turkey. In general, legislation is protective and regulatory, but in some cases it could be used in contradictory ways. This study investigates only timber sales to forest villagers and related subsidies concerning market failures and externalities. Subsidized timber sales to forest villagers...

Author(s): Yusuf Güneş and Kenan Ok

  • Article Number: 5917EAB19772

July 2010

High school students’ attitudes towards geography and the questions that they wonder about it

Four hundred and five (405) students were involved in this survey in order to determine general attitudes of High School students towards Geography. The only aim of this study is not to determine the place of Geography lesson among other courses. We also tried to find out the reasons why students have positive or negative attitudes towards it. The results of the research suggest that Geography is the fourth lesson among...

Author(s): Necati Tomal    

  • Article Number: AED508619787

July 2010

Responses of some wheat genotypes and their F2 progenies to salinity and heat stress

Both heat and salinity cause yield decrease in wheat. Grain yield in wheat has increased as a result of breeding efforts for different stress conditions. However, there are still substantial opportunities to improve grain yield by using conventional breeding under stress conditions, like heat and salt stress. The objective of this study was to investigate heat and salt effects on yield and some agronomic traits of four...

Author(s): Mehmet Yildirim and Bilge Bahar  

  • Article Number: B3A7C2619812

July 2010

Heat and drought resistances criteria in spring bread wheat: Drought resistance parameters

Some spring bread wheat genotypes were evaluated for drought resistance using drought tolerance efficiency (DTE) and drought susceptibility index (DSI) under rainfed conditions in this study. Field trials were conducted in the Research Area of Field Crops Department, Agricultural Faculty, Cukurova University during 2002 - 2003 with high rainfall and 2003 - 2004 with low rainfall growth seasons. High variations were...

Author(s): MBilge Bahar and Mehmet Yildirim

  • Article Number: 6B9AD2A19827

July 2010

Heat and drought resistances criteria in spring bread wheat: Drought resistance parameters

Some spring bread wheat genotypes were evaluated for drought resistance using drought tolerance efficiency (DTE) and drought susceptibility index (DSI) under rainfed conditions in this study. Field trials were conducted in the Research Area of Field Crops Department, Agricultural Faculty, Cukurova University during 2002 - 2003 with high rainfall and 2003 - 2004 with low rainfall growth seasons. High variations were...

Author(s): Bilge Bahar and Mehmet Yildirim  

  • Article Number: 03291D719842

July 2010

Views of student teachers on information technology integration in geography teaching

The aim of this study is to examine the views of Primary School Social Studies teacher candidates regarding integration of Information Technologies in teaching and learning processes. The sample of the study was composed of 122 student teachers in their third year pursuing their studies in the “Department of Primary Education Social Studies Teaching”, Faculty of Education, Mehmet Akif Ersoy University. The...

Author(s): Hakkı Yazici and Hilmi Demirkaya  

  • Article Number: BF6502919856

July 2010

Remote electronic experiments using LabVIEW over controller area network

Remote laboratories are essential for many distance learning institutions in the area of engineering. There are useful experimental sets proposed by researchers in different scientific areas. The structure of remote laboratories is still under development. This paper presents an electronic laboratory controlled by a server operated with LabVIEW software. Controller area network (CAN) behind the server computer provides...

Author(s): Akif Kutlu and Kubilay Taşdelen

  • Article Number: C7CEBDF19919

July 2010

Development of a soft network model to improve supply chain management performance of SMEs

Nowadays, Supply Chain Management (SCM) plays a crucial role in gaining competitive advantage in business for all productions and service industries. The recognition of the parties into SCM and their positions are considered highly strategic from management viewpoint. The present paper introduces a soft network model for SCM of Small and Medium sized enterprises (SMEs) to enhance the performance of the whole chain. The...

Author(s): Hadi Ghaderi, Soroush Avakh Darestani, Zulkiflle Leman and Md Yusof Ismail

  • Article Number: 723913919945

July 2010

Estimation of Pinus brutia Ten. wood density from Fourier Transform Infrared (FTIR) spectroscopic bands by Artificial Neural Network (ANN)

In this study, the rapid Fourier transform infrared (FTIR) spectroscopic method was used to indirectly measure the wood density of Pinus brutia Ten. samples. A model was constructed to relate FTIR data to wood density determined by laboratory analysis, through the application of artificial neural network (ANN) modelling approach to a set of calibration observations. The proposed model with two hidden neurons...

Author(s): Bilgin Guller and Samim Yasar  

  • Article Number: EDAA5BE19970