Sciences de l'ingénieur et technologies

Article scientifique

Analysis of mechanical structures using plate finite element method under different boundary conditions

The mechanical discrete or continuum structures are actually of great importance in the application field of contemporary modern industry. However, …

2018 Open Access

Article scientifique

A new error estimate on uniform norm of Schwarz algorithm for elliptic quasi-variational inequalities with nonlinear source terms

The Schwarz algorithm for a class of elliptic quasi-variational inequalities with nonlinear source terms is studied in this work. The …

2018 Open Access

Article scientifique

Analytical modelling for Newtonian fluid flow through an elastic tube

The objective of the present work is to develop analytical modelling of an unsteady fluid flow through an elastic tube. …

2018 Open Access

Article scientifique

Kantorovich variational method for the flexural analysis of CSCS Kirchhoff-Love plates

The Kantorovich variational method was used in this study to solve the flexural problem of Kirchhoff-Love plates with two opposite …

2018 Open Access

Article scientifique

Wind power variability and power system reserves in South Africa

Variable renewable generation, primarily from wind and solar, introduces new uncertainties in the operation of power systems. This paper describes …

2018 Open Access

Article scientifique

Performance Evaluation of Design AD System Biogas Purification Filter

Biogas purification which is the removal of impurities so as to improve the efficiency of gas produced, ensure the safety …

2018 Open Access

Article scientifique

Mechanical lower back pain and sacroiliac joint dysfunction in golfers at two golf clubs in Durban, South Africa

Background: Mechanical lower back pain (MLBP) and sacroiliac joint dysfunction (SIJD) are common problems among golfers. There are currently few …

2018 Open Access

Article scientifique

The impact of a fuel levy on economic growth in South Africa

Government expenditure is one of the factors that could influence economic growth and it depends on borrowing or on the …

2018 Open Access

Article scientifique

Analysis of multi-layered commingled and compartmentalized gas reservoirs

The evaluation and performance prediction of multi-layered compartmentalized gas systems can be difficult. This is mostly due to the uncertainties …

2018 Open Access

Article scientifique

Trace element geochemistry of kerogens from the central Niger Delta

Trace elements in kerogens isolated from shale samples obtained from oil wells in the central Niger Delta were determined using …

2018 Open Access

Article scientifique

Decolorization of turbid sugar juice from sugar factory using waste powdered carbon

Carbon decolorization still extensively applied in the field of food production such as sugar refining to remove color precursors from …

2018 Open Access

Article scientifique

Density forecasting for long-term electricity demand in South Africa using quantile regression

Background: This study involves forecasting electricity demand for long-term planning purposes. Long-term forecasts for hourly electricity demands from 2006 to …

2018 Open Access

Article scientifique

High performance estimations of natural frequency of basalt FRP laminated plates with intermediate elastic support using response surfaces method

Studying the changes of the natural frequencies due to intermediate elastic support of laminated composites is usually need a lot …

2018 Open Access

Article scientifique

A proposed solution to the determination of water saturation: using a modelled equation

Reservoir characterization is an important phase in oil and gas field development, which takes place during the appraisal phase of …

2018 Open Access

Article scientifique

Conditions for economic competitiveness of pumped storage hydroelectric power plants in Egypt

Pumped storage hydroelectric power plants are one of the most applicable energy storage technologies on large-scale capacity generation due to …

2018 Open Access

Article scientifique

Techno-economic analysis of the industrial production of a low-cost enzyme using E. coli: the case of recombinant β-glucosidase

The enzymatic conversion of lignocellulosic biomass into fermentable sugars is a promising approach for producing renewable fuels and chemicals. However, …

2018 Open Access

Article scientifique

رفع مناقشه روی منحنی تعامل حاصل از مدل پایداری چندمنظورۀ محیط طبیعی و زراعت تحت ورشکستگی آبی

هدف این پژوهش توسعه یک مدل غیرخطی تخصیص آب با لحاظ تابع تولید محصول به‌ازای آب مصرفی، معادله پیوستگی مخزن …

2018 Open Access

Article scientifique

گزارش یک مورد نادر کاتاتونی ناشی از سایکوز بعد از زایمان

مقدمه: کاتاتونی، یک اختلال عصبی- روان‌پزشکی است که مشخصه آن، وجود ترکیبی از علائم موتوری، رفتاری، هیجانی و نباتی می­باشد …

2018 Open Access

Article scientifique

بررسی ارتباط شدت استریای بارداری با پارگی زودرس پرده های جنینی در زنان نخست زا

مقدمه: پارگی زودرس پرده‌های جنینی یک عارضه شایع در مامایی و از جدی‌ترین پیامدها در دوران بارداری است؛ به‌طوری‌که می­تواند …

2018 Open Access

Article scientifique

ارزیابی کارایی الگوریتمهای رقابت استعماری و ژنتیک در تخمین پارامترهای کیفی آب زیرزمینی (مطالعه موردی: دشت بستانآباد)

الگوریتم رقابت استعماری یک الگوریتم بهینه سازی جدید می‌باشد و در مقایسه با سایر الگوریتم‌های مختلف بهینه‌سازی توانایی بهینه‌سازی هم‌تراز …

2018 Open Access