This paper describes an improved procedure and simple and green method for the efficient and facile synthesis of 3,4-dihydropyrimidinones with excellent yields using inexpensive heteropolyacid catalyst in the presence of green solvent.

The inhibition effect of a new synthesized Schiff base, namely 4-nitro-2-methoxy phenyl- N-salicylidine on the corrosion of mild steel in 0.5 M HCl acid have been investigated at room temperature using electrochemical impedance spectroscopy(EIS), Tafel polarization and weight loss measurements.…

The forensic examination and dating of documents is important in our society, because documents are used throughout our lives to record everything we do. The analysis of questioned documents therefore involves different types of analysis including comparison of the handwriting,…

In this note, we  investigate extensions of Baer and principally projective modules. Let  R be an arbitrary ring with identity and M a right R-module. For an abelian module M, we show that M is Baer (resp. principally projective) if…

The existence of missing observation in the data collected particularly in different fields of study cause researchers to make incorrect decisions at analysis stage and in generalizations of the results. Problems and solutions which are possible to be encountered at…

This paper presents a novel topology for cascaded multilevel inverters that only two flying capacitors apply single DC source voltage to all sub-multilevel inverters. The output voltages of each sub-multilevel inverters unit, which each unit can produce five voltage levels,…

Solid state transformers (SST) are used to perform typical functions and improve power quality in series operation of three-phase power systems. Generally, current harmonics and unbalances and neutral wire current are generated due to nonlinear, unbalance load and supply voltage…

Arsenic in the ground water is a worldwide problem as about 150 million people are at risk and more than 70 countries are suffering from this havoc. Arsenic is a carcinogen and responsible of various types of cancers. India is…

Petri nets are frequently used for modeling and analysis of discrete event systems. Similar to other modeling formalisms for discrete systems,  it suffers from state explosion. Fluidification can be used to overcome this difficulty yielding  fluid approximation of original Petri…

Occupational accidents lead to serious problems in Turkey and in many other countries. The most important results of occupational accidents are deaths, injuries or disabilities. In addition, many other important work-related accidents cause serious financial losses. As it is all…