Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2753

Table of Content: 18 November 2010; 5(22)

November 2010

Impacts of mining on water resources in South Africa: A review

  Acid mine drainage is recognized as one of the more serious environmental problems in the mining industry. Acid mine drainage is a major problem on coal and gold mines throughout the world and in South Africa, the main focus of this study, is no exception. Various studies that have been undertaken in South Africa have shown that the water decanting from the mine companies is highly acidic and as such cannot...

Author(s): George M. Ochieng, Ephrahim S. Seanego and Onyeka I. Nkwonta

November 2010

Phenological observations on a bean trefoil (Anagyris foetida L.) population in the Kahramanmaras region, Turkey

  Bean trefoil (Anagyris foetida L.), Leguminosae, is a Mediterranean element and summer-deciduous shrub species. In this study, about 5.5-month phenological observations were made on a bean trefoil population in the Kahramanmaras region, southern Turkey, and the time and duration of phenological phases of the species were tried to be determined. In bean trefoil population of the region, the order of...

Author(s): Mahmut D. Avsar and Tolga Ok

November 2010

The geometrical nonlinear analysis of the prismatic plane frames with the stiffness matrice method

  In this study, the geometrical non-linear analysis of the prismatic plane frames was researched with the stiffness matrice method by using the stability functions. First of all, having assumed the axial forces acting on the members as zero, the system was solved linearly under the initially set external loads, and the member axial forces were determined. The Stability Functions were calculated by using the...

Author(s): Rifat Sezer

November 2010

A new measurement method for determination of low back pain

  The patient's low back pain can be determined using the visual analog scale (VAS) as subjective methods. This study aims to design a device used in evaluating low back pain objectively, by measuring skin resistance. To test the developed system, 8 low back pain (experimental group) and 8 healthy (control group) subjects were admitted in Dumlupinar University, Medical Faculty, Physical Therapy and...

Author(s): Eyyup Gulbandilar and Hakan Gulhan

November 2010

Assessing certain root characteristics among provenances of Gnetum spp. in South West Cameroon: Relevance for domestication and conservation

  Gnetum africanum and Gnetum bulchozianum are two slow-growing, dioecious, and morphologically similar understorey lianas that are widely distributed in the humid tropical forests of West and Central Africa. Dwindling wild stocks of the widely consumed leafy vegetable are under persistent threat from deforestation, increasing demand and harvesting pressure. These factors militate in favour of...

Author(s): C. A. Bongjoh, B. K. Ngane and M. Tchatat

November 2010

Application of Fuzzy mathematical programming approach to the aggregate production/distribution planning in a supply chain network problem

  This paper presented an application of Fuzzy mathematical programming model to solve network design problems for supply chains via considering aggregate production planning (APP). APP goals to minimize all costs through optimal levels of production, subcontracting, inventory, backorder and work levels over a time period to meet the demand. Fuzzy logic was applied to solve the uncertain...

Author(s): T. Paksoy, N. Y. Pehlivan and E. Ozceylan

November 2010

Correlation between “wide wheel abrasion (capon)” and “Bohme abrasion” test results for some carbonate rocks

  The experiment standard EN 14157 (Natural stones - Determination of abrasion resistance) is applied both as certification and in the context of quality assessment for natural stones. This standard presents the application details of “wide wheel abrasion” and “Bohme abrasion” tests used for determination of abrasion resistance of natural stones used as slabs in construction sector. The...

Author(s): Ibrahim ÇobanoÄŸlu, Sefer Beran Çelik and Devrim Alkaya

November 2010

Feasibility research of text information filtering based on genetic algorithm

  For the problem of content-based information filtering, this paper introduces genetic algorithm to solve this problem, because it could find optimal solutions within global context. In order to illustrate the effectiveness of this approach, it gives a new approach based on set theory, and it also gives an experiment. From the theoretical proof and the experimental results, we could see that the method is...

Author(s): Zhenfang Zhu and Peiyu Liu

November 2010

3-D architecture and elemental composition of fluconazole treated yeast asci

  In this study, sexual structures (asci) of the yeast Nadsonia fulvescens containing mature and fluconazole-treated malformed ascospores were studied using NanoSAM in combination with transmission electron microscopy (TEM). This is the first application of NanoSAM to biological material. TEM exposed a variety of malformed ascospores in asci treated with fluconazole. Here some ascospores produced...

Author(s): Chantel W. Swart, Hendrik C. Swart, Elizabeth Coetsee, Carolina H. Pohl, Pieter W. J. van Wyk and Johan L. F. Kock

November 2010

Effects of geometrical parameters and internal wall velocity on turbulent flow and heat transfer in helical square duct with moving wall

  In this study the effect of geometrical dimensions and the internal wall velocity on turbulent flow and heat transfer in a helical square duct with movable wall are numerically analyzed. RNG k-ε turbulent model and finite volume method are used in the numerical solutions. The validity of the numerical solutions are tested by previous experimental studies with different boundary conditions and it has...

Author(s): Okyar Kaya and Ismail Teke

November 2010

Effect of soil addition on physical properties of perlite based media and strawberry cv. Camarosa plant growth

  This research was carried out to determine the effect of soil addition to perlite medium on strawberry growth in Erzurum, Turkey. Five different levels of soils (10, 20, 30, 40 and 50% by volume) were added to perlite and 100% perlite was used as a control. The amount of moisture retained at different tensions and distribution of pore size of these growing media were determined. Some vegetative plant...

Author(s): Selda Ors and Omer Anapali

November 2010

Effect of cement, sodium silicate, kaolinite and water on the viscosity of the grout

  Cement, sometimes with/without other binders, is widely used for the stabilization of soil by injection and grouting methods. Chemical grouts and sodium silicate are commonly used worldwide for stabilizing soft soils. This article presents the effectiveness of using cement, sodium silicate, water and kaolinite on the viscosity of the grout. Different samples with different ratio of grout components were...

Author(s): Sina Kazemian, Arun Prasad, Bujang B. K. Huat, Thamer A. Mohammedand Farah N. A. Abdul Aziz

November 2010

Transgenic Pinus armandii plants containing BT obtained via electroporation of seed-derived embryos

  A genetic transformation system for Pinus armandii was presented using electroporation for gene delivery and mature embryo as the gene target. Plasmid DNA (pBSbtCryIII(A)), which contained a selectable npt// gene for resistance to the kanamycin and a synthetic chimeric gene SbtCryIII(A) encoding the insecticidal protein btCryIII(A), was delivered into mature...

Author(s): X. Z. Liu, H. L. Li, R. H. Lou, Y. J. Zhang and H. Y. Zhang

November 2010

A new algorithm for setting initial values for Markov Chain Monte Carlo in genetic linkage analysis via Gibbs sampling

  In recent decades the Markov Chain Monte Carlo (MCMC) method has received a considerable attention in the area of genetic linkage analysis. Pedigree Gibbs sampler as a MCMC method like the other Markov Chain-based methods of resampling faces some difficulties in application. One of the difficulties is setting the initial genotypes consistent with observed phenotypes in order to make the chain start moving to...

Author(s): Gholamreza Jandaghi

November 2010

A novel peer-to-peer SMS security solution using a hybrid technique of NTRU and AES-Rijndael

  Short message service (SMS) is a very popular and easy to use communications technology for mobile phone devices. Originally, this service was not designed to transmit secured data, so the security was not an important issue during its design. Yet today, it is sometimes used to exchange sensitive information between communicating parties. This paper proposes an alternative solution that provides a...

Author(s): Sameer Hasan Al-bakri and M. L. Mat Kiah

November 2010

Evaluation on pathologic status of the residual lesions after ultrasound- guided, 8-gauge vacuum-assisted mammotome® system biopsy for nonpalpable malignant breast lesions and its influencing factors

  The vacuum-assisted Mammotome® system is now considered highly accurate for ultrasound-guided diagnostic biopsy and selective excision of suspicious breast lesions. Our goal is to evaluate the residual lesions pathologic status after ultrasound-guided, 8-gauge vacuum-assisted mammotome® system biopsy for nonpalpable malignant breast lesions, and to explore its influencing factors. A total of 281...

Author(s): Jin-Song He, Xian-Ming Wang, Shin-Cheh Chen, Wei-Cai Chen, Shu-Fang Huang, Yue-Hua Liu, Jia-Ting Zhang, Zheng-Yi Li, Wei-Zhong Liu and Hong Guan

November 2010

The seamless vertical handover between (universal mobile telecommunications system) UMTS and (wireless local area network) WLAN by using hybrid scheme of Bi-mSCTP in Mobile IP

  Nowadays many different types of networks communicate among themselves to form heterogeneous wireless networks (HWN). Seamless vertical handover (VHO) between a Universal Mobile Telecommunications System (UMTS) and a Wireless Local Area Network (WLAN) is necessary to provide continuous internet access for mobile node (MN) as roaming across these networks is to be without interruption. To support the seamless...

Author(s): Bashar J. Hamza, Chee Kyun Ng, N. K. Noordin, M. F. A. Rasid, and A. Ismail

November 2010

Adaptive real time wireless data transmission using superposition coding with feedback of channel state information

  High quality data transmission services are an important issue for broadband wireless access (BWA) systems. This paper deals with the design issues of a real-time wireless data transmission which provides unequal error protection (UEP) over an additive white Gaussian noise (AWGN) channel. Traditionally, transmission is made from a one bit stream at one level of power (for example, pulse amplitude modulation...

Author(s): Yaseen Hasan Tahir, Chee Kyun Ng, Nor Kamariah Noordin, Borhanuddin Mohd Ali and Sabira Khatun

November 2010

In vitro cloning and cell type-specific regulation of tyrosine hydroxylase promoter in C57BL/6J mice

  In order to investigate the ability of mouse tyrosine hydroxylase (TH) promoter regulating target genes in vitro, high-fidelity PCR was employed to amplify 450 bp, 1500 bp, 2000 bp, 2400 bp and full-length fragments of mouse TH promoter, which were then independently inserted into pcDNA3.0 plasmid as a promoter to regulate EGFP in two different cell lines [MN-9D (TH+) and ECV (TH-) cells]. The results...

Author(s): Xiaorong Zhu, Honghua Yuan, Fenggang Yuan and Dianshuai Gao

November 2010

Differentiating between nighttime and daytime brain images in cases with restless legs syndrome and studying responsible areas

  In this study, a software has been developed to detect the regions that could be responsible for areas in the nervous system of the disorders of cases with Restless Legs Syndrome (RLS). This software produces three distinct results, processing the brain perfusion SPECT image during a time when the patient has no disorders and the brain perfusion image at the time of patient’s disorder, with...

Author(s): A. Çakır, T. AydoÄŸan and H. R. KoyuncuoÄŸlu

November 2010

A review of the Turkish Orthopelmatinae (Insecta: Hymenoptera: ichneumonidae)

  Two Orthopelmatinae species from Turkey are reported, redescribed and figured. One species is a new record for Turkish fauna. A key for Turkish Orthopelmaspecies is given.   Key words: Ichneumonidae, orthopelmatinae, Turkey, fauna, key, redescription.

Author(s): Saliha Coruh and Janko Kolarov

November 2010

User preferences and problems encountered in the selection of housing windows in Turkey

  In this study, the most preferred window type relating to housing in Turkey according to the quality of the material used during production, the reasons of preference, the problems encountered during the use of the preferred windows, production defects and the assessments of the users relating to windows production industry have been studied. The study is planned within the scope of Duzce city, a region with...

Author(s): Derya Sevim Korkut, Tuncer Dilik, E. Seda Erdinler, K. Hüseyin Koc and Ahmet Kurtoglu

November 2010

Population pre-selection operators used for generating a non-random initial population to solve vehicle routing problem with time windows

Ocotlán Díaz-Parra, Jorge A. Ruiz-Vanoye* and José C. Zavala-Díaz

Author(s): Ocotlán Díaz-Parra, Jorge A. Ruiz-Vanoye and José C. Zavala-Díaz

November 2010

Basic design dilemmas in architectural education

  The conflicts of modern times demand high levels of creativity from the architect. Creativity, with all its social and physical connotations and implications, should therefore be the guiding concept in the revision of architectural education. The basic design course, which is deemed to foster creativity, plays an important role in the education of architects. Approaches of the mentors of this course vary....

Author(s): Ali Asasoglu, Sengul Oymen Gur and Sengul Yalcınkaya Erol