Iris Publishers Journal Of Engineering Sciences

  https://irispublishers.com/gjes/fulltext/thermal-protection-systems-for-buildings-in-egypt.ID.000689.php Authored by Ashraf A Gaafar The thermal comfort in buildings is one of the most characteristic and important aim that architecture must provide, as the typical way to achieve the thermal comfort in buildings is the intensive use of energy consumed, but this is of course not an ideal approach because it leads to waste of energy. High consumption rates of electric energy and non-renewable energies are among the most serious problems facing Egypt and the whole world at the present time, as the deficit is increasing continuously. After analyzing and updating the international, local examples, studies and measurements that were developed by specialists in this field, we found that under the great development in methods of urban planning and design and access to finishing materials and thermal insulation of buildings has become a significant impact in the reduction of 40-50% of the...

  Influence of Green Terraces in Evaluating the Action of Wind on Buildings Authored by Isopescu Dorina Nicolina The development of the construction sector, as a result of the special emphasis of recent years in the implementation of the principles of sustainability, has included various directions: from structural certification of environmentally friendly materials in terms of their durability and carbon dioxide emissions, and the innovation of building systems respecting the energy efficiency principles requirements, until to the innovation of the shape and volume concepts of buildings. All over the world there are recognized examples of nature-friendly architecture. The complexity of sustainable development in construction is increasingly becoming cross-cutting research, which covers the integrated techniques of materials science, building physics, with the circular economy, and with plant science. This challenge offers new opportunities for buildings to become less polluting a...

Numerical Computation of Separation Events Authored by Kevin Murphy Impacting systems possess stiffness discontinuities (nonlinearities) and integrating the system through these abrupt transitions in stiffness is numerically challenging. Henon’s method [1] for identifying numerically the instant of impact - and the associated values of the state variables - is well established. However, in cases where distinct components move together, there is not a well-developed technique for identifying when they separate because this separation event is not expressed in terms of the generalized coordinates. This work presents a numerical technique for doing just that. If one couples this method with Henon’s method, the time response of a system undergoing repeated impacts and separations may be obtained with a high degree of precision. Several specific examples are presented to demonstrate the utility of the method. Impact oscillators give rise to nonlinear behavior through the abrupt, impulsiv...