University of Bahrain

About: University of Bahrain is a education organization based out in Madīnat ‘Īsá, Bahrain. It is known for research contribution in the topics: Thin film & Doping. The organization has 1650 authors who have published 3405 publications receiving 48162 citations. The organization is also known as: Bahrain University & UoB.

Numerical modelling of lightweight Steel‐Concrete‐Steel sandwich composite beams subjected to impact

Abstract: This paper presents the numerical and analytical models to predict the response behaviour of Steel–Concrete–Steel (SCS) sandwich composite beams subjected to drop-weight impact loading. The sandwich composite beam has an ultra-lightweight concrete core of density 1440 kg/m 3 sandwiched between two thin steel face plates which are interconnected by J-hook connectors. Explicit nonlinear finite element analysis was carried out and the results obtained are verified against the impact test data to establish its accuracy in predicting the permanent deformation, vertical displacement–time history and impact force–time history of the sandwich beams. The numerical analysis also shows that the J-hook connectors are subjected to tension force during impact in addition to shear force due to flexural action in the beam. This signifies the important role of J-hook connectors in preventing tensile separation of the steel face plates when subjected to impact load. An analytical approach based on energy balance model was also developed to predict the impact response of SCS sandwich beams. A good agreement was observed between the analytical solution and the experimental data indicating that the approach provides a reasonable and conservative estimation of the impact resistance of the sandwich beams.

Accounting systems and recording procedures in the early islamic state

Abstract: Despite advances in historical knowledge the precise origins of accounting systems and recording procedures remain uncertain. Recently discovered writings suggest that accounting has played a very important role in various sections of Muslim society since 624 A.D. This paper argues that the accounting systems and recording procedures practiced in Muslim society commenced before the invention of the Arabic numerals in response to religious requirements, especially zakat, a mandatory religious levy imposed on Muslims in the year 2 H.