abstract in aggregate, active forms of reactive silica with mineral names are sometimes associated with sand and gravel in concrete mixture. alkali hydroxides originated from alkalis in the cement or other resources form an alkaline silica gel with this reactive silica which becomes swallowed and expanded during time causing damage to concrete. there have been growing researches on alkaline r...

abstract nowadaysphotovoltaic solar cells (pvs) areacknowledged the fastest growing energy technology in the word, however, they only account for only fraction of current global renewable energy capacity. it isrecognized that this incomplete market penetration has been largely a result of the technology’sexcessive cost. so researchers are trying to find innovative, economic way with theaim of ...

Sukuk is the most important Islamic financial securities designed based on Islamic laws, and the relationship between risk and return is the most basic concept in Islamic finance. The results of examining and comparing the similarities between bonds and sukuk show that the most important difference between these two financing tools is the type of asset backed by sukuk and the type of asset cont...

the effect of the presence of perforations on he stresses of a plate is a problem which is of great interest in structural design and in the mathemattical theory of elasticity. among the many hole patterns that are likely to require consideration is the ring of equally spaced circular holes. the present worke investigates stress & strain analysis of a thin isotropic circular plate containing a ...

The present study aimed to investigate fraud risk factors affecting fraud occurrence in the branches of Resalat Bank in Isfahan, Iran, in 2017. The study is an applied research as far as the purpose is concerned, and a descriptive survey study as far as the procedures for data collection are concerned. The population of the study comprised experts in accounting computer information system, expe...

abstract amino acids are building blocks of proteins, and play a vital role in living beings existence and their functionality. the interaction of these compounds with metal ions is of great importance to biochemists, and chemists, because their functions can be utilized as a model in understanding enzymes mechanism for transport of metal ions to tissues. among twenty essential amino acids w...