Central European Journal of Engineering
2081-9927
1896-1541
Cơ quản chủ quản: N/A
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Các bài báo tiêu biểu
A reliable iterative method for solving the time-dependent singular Emden-Fowler equations
Tập 3 - Trang 99-105 - 2012
Many problems of physical sciences and engineering are modelled by singular boundary value problems. In this paper, the variational iteration method (VIM) is used to study the time-dependent singular Emden-Fowler equations. This method overcomes the difficulties of singularity behavior. The VIM reveals quite a number of features over numerical methods that make it helpful for singular and nonsingu......
The influence of triggers geometry upon the stiffness of cylindrical thin walled tubes
Tập 4 - Trang 101-109 - 2014
Today’s automobile manufacturers are increasingly using lightweight materials to reduce weight; these include plastics, composites, aluminium, magnesium alloys, and also new types of high strength steels. Many of these materials have limited strength or ductility, therefore in many cases the rupture being serious consequences during crashes, underscore Picketta et al. in their studies. Automotive ......
An exploration of FMCDM approach for evaluating the outcome/success of GSD projects
Tập 3 - Trang 419-435 - 2014
This study presents a fuzzy multi-criteria decision making (FMCDM) approach for analyzing the influential factors affecting the outcome/success of global software development (GSD) projects. The main aim of this study is to demonstrate the potential of proposed methodology based on FMCDM which is used to measure the offshore/onsite teams’ partnership quality dimensions and underlying the influenti......
A power efficient bandwidth regulation technique for a low-noise high-gain RF wideband amplifier
Tập 2 - Trang 383-391 - 2012
In this paper, a single-stage deep sub-micron wideband amplifier (LNA) using a reactive resonance tank and passive port-matching techniques is demonstrated operating in the microwave frequency range (K band). A novel power-efficient bandwidth (BW) regulation technique is proposed by incorporating a small impedance in the resonance tank of the amplifier configuration. It manifests a forward gain in......
Characteristics and potential applications of coarse clay fractions from Puolanka, Finland
Tập 2 - Trang 239-247 - 2012
Characterization of coarse fractions of kaolin clay from two locations in Puolanka (Pihlajavaara and Poskimäki) was performed in order to find potential applications for these materials in water and wastewater treatment as low-cost adsorbents or as a raw material for other uses. The effects of wet and dry fractionation methods and the annealing of the sample on the properties of the coarse fractio......
Effects of baffle length on turbulent flows generated in stirred vessels
Tập 1 - Trang 401-412 - 2011
The aim of this paper is to study the effect of baffles length on the turbulent flows in stirred tanks. The hydrodynamic behaviour induced by a Rushton turbine (RT6) is numerically predicted by solving the Navier-Stokes equations in conjunction with the Renormalization Group (RNG) of the k-ɛ turbulence model. These equations are solved by a control volume discretization method. The numerical resul......
Studies on optical characteristics of CuInSe2 thin films
Tập 3 - Trang 170-173 - 2013
CuInSe2 is considered as a striking semiconductor for second generation solar cells. An investigation of optical properties of CuInSe2 thin films is essential to evaluate its perfectibility as high efficiency solar cells. The films were fabricated by thermal co-evaporation technique. For this experiment, a shimadzu spectrophotometer of model number 1201 is used. The optical properties of these fil......
A facile fabrication of Cu2O nanowire arrays on Cu substrates
Tập 2 - Trang 364-368 - 2012
Nanomaterials play an important role in modern science and engineering. The ability to fabricate nanomaterials with high quality and low cost is a primary stage for further discovering their applications. This research article presents a facile fabrication of Cu2O nanowires on Cu substrate. It was found that simply heating Cu in air leads to the growth of Cu2O nanowires. The Cu2O nanowires are ali......
Pneumatic pulsator design as an example of numerical simulations in engineering applications
Tập 2 - Trang 76-82 - 2011
The paper presents the part of the investigation that has been carried out in order to develop the pneumatic pulsator which is to be employed as an unblocking device at lose material silo outlets. The part of numerical simulation is reported. The fluid dynamics issues have been outlined which are present during supersonic airflow thought the head of the pulsator. These issues describe the pneumati......
Recent developments and perspectives on the treatment of industrial wastes by mineral carbonation — a review
Tập 3 - Trang 566-584 - 2013
Besides producing a substantial portion of anthropogenic CO2 emissions, the industrial sector also generates significant quantities of solid residues. Mineral carbonation of alkaline wastes enables the combination of these two by-products, increasing the sustainability of industrial activities. On top of sequestering CO2 in geochemically stable form, mineral carbonation of waste materials also bri......