Removal of spilled petroleum oil from water bodies using hydrophobic porous absorbent has garnered considerable attention due to the simplicity, large-scale adaptability and robustness process. However, use nonbiodegradable synthetic during cleanup raised a secondary concern such as generating plastic pollutants that can accumulate in marine other ecosystems. To encounter this potential hazard,...

Shaft position sensing is an essential part of switched reluctance (SR) motor drive In order to synchronize the pulses of phase current with the period of rising inductance of the proper motor phase. Direct sensors such as, Hall effect and optical encoder are commonly used in SR motors. The purpose of this paper is to present an indirect shaft positioning sensing known as "sensorless " control ...

cyanide is one of the major environmental pollutants in industrial wastewater. entrance of it to existence environmental contains very health hazardous. the cyanide can be removed from aqueous solutions in many ways, but most of these methods are expensive. in the present study, novel magnetic nanoparticle modified with a polydentate ligand is used to remove cyanide. the procedure is efficient ...

Sound absorbing boundaries can attenuate noise propagation in a long space, but they may lead the sound field hard to be accurately predicted. This paper presents a coherent image source model for sound field in long spaces with a sound absorbing ceiling. In this model, the reflections on the absorbent boundary are separated from those on reflective ones during applying refection coefficients. ...

Abstract. The use of low-cost sensors for air quality measurements has become very popular in the last few decades. Due to detrimental effects particulate matter (PM) on human health, PM like photometers and optical particle counters (OPCs) are widespread have been widely investigated. negative high relative humidity (RH) fog events mass concentration readings these types well documented. In li...

abstract in this study the effects and costs of application of two kinds of super absorbent polymer on the establishment and surviving of seedlings was investigated. experiments were done in the field and on two kind of soil with different salinity (ec: 4.5 and 8 dsm-1). the results showed: the establishment rate of seedling in control was about 40 percent. the percentage of seedling establishm...