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51 results for “cubic”
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Research ArticleOpen accessIn the abstractAn Applied Study on the Debris Recycling in TunnellingPierpaolo Oreste, Marta CastellanoProblem statement: A simple calculation has shown what the impact of muck created during the construction of a hypothetical 50 km long and 100 m2 cross section tunnel could be on the environment: around 8 million cubic meters would have to be discharged as waste material. One solution to such a problem could be to recycle (almost a part) the … …American Journal of Environmental Sciences, Vol. 8, Issue 2 · 27 Mar 2012 · 7,521 accessesView PDFCite
Research ArticleOpen accessIn the abstractHalf-bounded Numerical Solution of Singular Integral Equations with Cauchy KernelM. Abdulkawi, Z. K. Eshkuvatov, N.M.A. Nik LongProblem statement: In this study, a numerical solution for singular integral equations of the first kind with Cauchy kernel over the finite segment [-1,1] is presented. The numerical solution is bounded at x =1 and unbounded at x = -1. Approach: The numerical solution is derived by approximating the unknown density function using the weighted Chebyshev polynomials of the fourth … …Journal of Mathematics and Statistics, Vol. 7, Issue 1 · 25 Mar 2011 · 7,277 accessesView PDFCite
Research ArticleOpen accessIn the abstractQuantum Mechanical Calculation of the Optical Absorption of Silver and Gold Nanoparticles by Density Functional TheoryElham Gharibshahi, Elias SaionProblem statement: Metal nanoparticles confine the motion of conduction electrons and exhibit a strong optical absorption of electromagnetic radiation in the UV-vis-NIR region. The absorption is classically derived from the collective oscillations of free electrons in a metallic nanostructure as a consequence of incident electromagnetic radiation polarizing the particle optically embedded in a dielectric matrix. These oscillations, known as the … …Physics International, Vol. 1, Issue 1 · 31 Mar 2010 · 16,193 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Determination of Optimal Crop Pattern with Aim of Reduction in Hazards of EnvironmentalMahmoud Daneshvar Kakhki, Nasser Sahnoushi, F. Salehi Reza AbadiProblem statement: The purpose of the study was to find the optimal cropping pattern, in Taybad, which maximizes the net return per water cubic meter and per fertilizer kilogram. Approach: A linear programming model and a fuzzy multi-objective fractional programming model were applied and then these models were compared. Results: Result of study showed ratio of net return into consumption … …American Journal of Agricultural and Biological Sciences, Vol. 4, Issue 4 · 31 Dec 2009 · 8,285 accessesView PDFCite
Research ArticleOpen accessIn the abstractEstimating Snow Budget of Karaj Dam ReservoirManijeh Ghahroudi Tali, Bohloul Alijani, Reza SarvatiProblem statement: Most of the cold period precipitation of Karaj Basin falls in the form of snow. This snow and its run off are important to the dam and the local needs such as agriculture and the drinking water of Tehran. But due to the scarcity and in some elevations the lack of weather stations, measuring this snow cover and … …American Journal of Applied Sciences, Vol. 6, Issue 5 · 31 May 2009 · 7,522 accessesView PDFCite
Research ArticleOpen accessIn the abstractSynthesis and Charaterization of Magnesium Zinc Ferrites as Electromagnetic SourceNoorhana Yahya, Ami Salwani Mohamad Nor Aripin, Azizuddin A. Aziz et al.Fabrication of Mg1-XZnXFe2O4 (where x = 0.2, 0.3, 0.4 and 0.5) samples using a conventional technique is reported. Oxides of magnesium, zinc and iron with purity of about 99.99% were mixed with distilled water in a milling machine for 12 hours. They were then filtered and presintered at 1250°C and sintered at 1350°C for 10 h in air. The phase … …American Journal of Engineering and Applied Sciences, Vol. 1, Issue 1 · 31 Mar 2008 · 9,003 accessesView PDFCite
Research ArticleOpen accessIn the abstractAn Assessment of Compressive Size Effect of Plane Concrete Using Combination of Micro-Plane Damage Based Model and 3D Finite Elements ApproachM. Labibzadeh, S. A. Sadrnejad, M. NaisipourIn recent years, the material behavior dependence of laboratory concrete specimens built with the same concrete mixture under the same load conditions to their geometrical sizes is well established. This phenomenon which is observed not only in concrete but also in most quasi-brittle materials such as rock, ceramic or composite materials is now called as size effect. Many of the … …American Journal of Applied Sciences, Vol. 5, Issue 2 · 28 Feb 2008 · 7,007 accessesView PDFCite
Research ArticleOpen accessIn the abstractEnergy Management System Audit and Implementation in Educational BuildingsJ. Nouri, A. R. Karbasi, R. Borgheipour, A. TaheriConcerning the high energy consumption of educational buildings in available study; it is conducted to estimate the energy consumption at the Faculty of Humanities (Building No. 2), Science and Research Campus (SRC) of the Islamic Azad University (IAU), Tehran, Iran. Auditing and implementing the energy management system in the implied building, efforts are finally made to propose managerial solutions towards … …American Journal of Applied Sciences, Vol. 3, Issue 3 · 31 Mar 2006 · 7,392 accessesView PDFCite
Research ArticleOpen accessIn the abstractReplacement Heifer Selection in A Beef Cattle HerdAkin Pala, Roger McCrawThe relationship between a heifer's weaning weight and her fertility and weaning weight of her calves was studied. Also investigated was the effect of dam amount of fat (DAF=dam weaning weight/weaning height) on heifers' ability to breed and rebreed. This is similar to Body Mass Index (BMI) calculated for humans. The relationship of dam's average daily gain from birth to … …American Journal of Applied Sciences, Vol. 2, Issue 2 · 28 Feb 2005 · 6,817 accessesView PDFCite
Research ArticleOpen accessIn the abstractSimulation of Thermal Stratification in Urban Man-made LakesJ. Nouri, H. Rahimipour, R. NezakatiChitgar artificial lake, located in the urban District-22 Municipality of Tehran northwest of Tehran, Iran is by volume l0 Million Cubic Meter (MCM), by depth average 10 meters (m.) and by area 225 hectares (ha) as the Iran’s largest man-made lake. The most important water resources of the district, which can support the lake water, are Kan River, municipal runoff, … …American Journal of Applied Sciences, Vol. 1, Issue 4 · 31 Dec 2004 · 7,191 accessesView PDFCite