Nano Bioactive Glass based on the CaO–P2O5–SiO2 System; synthesized by sol–gel method

Nano Bioactive Glass based on the CaO–P2O5–SiO2 System; synthesized by sol–gel method

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Part of #Nano Bioactive Glass based on the CaO–P2O5–SiO2 System; synthesized by sol–gel method# :

Publishing year : 2009

Conference : Sixth International Congress of Chemical Engineering

Number of pages : 4

Abstract: The synthesis of SiO2-CaO-P2O5 bioactive glass was carried out by the sol-gel method at significantly lower temperatures than required for conventional melting methods. The sol-gel-derived bioglass material was crushed into powder and its biocompatibility assessment was assessed by immersion studies in simulated body fluid (SBF) for different time intervals to examine the formation of a hydroxyapatite layer in SBF. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis were performed before and after contact of the material with SBF to characterize the chemical and physical properties of sol-gel derived bioactive powders.

MULTI-OBJECTIVE OPTIMIZATION OF SLIDING ISOLATION SYSTEMS EQUIPPED WITH VISCOUS DAMPERS IN CONTROLLING SEISMIC VIBRATION OF STRUCTURES

MULTI-OBJECTIVE OPTIMIZATION OF SLIDING ISOLATION SYSTEMS EQUIPPED WITH VISCOUS DAMPERS IN CONTROLLING SEISMIC VIBRATION OF STRUCTURES

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Part of #MULTI-OBJECTIVE OPTIMIZATION OF SLIDING ISOLATION SYSTEMS EQUIPPED WITH VISCOUS DAMPERS IN CONTROLLING SEISMIC VIBRATION OF STRUCTURES# :

Publishing year : 2011

Conference : 6th International Conference on Seismology and Earthquake Engineering

Number of pages : 8

Abstract: In this paper, we study the dynamic behavior of high-rise buildings supported by sliding insulation systems equipped with viscous dampers. The inclusion of the viscous damper in the sliding system is intended to enhance the efficiency of the isolator system and also to reduce the event displacements and after event residual displacement, the isolated building is modeled as a shear type structure with one lateral degree of freedom at each Story level.

Driving Vacuum Circuit Breaker Using Output Current of Current Transformer

Driving Vacuum Circuit Breaker Using Output Current of Current Transformer

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Part of #Driving Vacuum Circuit Breaker Using Output Current of Current Transformer# :

Publishing year : 2006

Conference : Twenty-first International Power Conference

Number of pages : 5

Abstract: When the electrical fault, such as a short-circuit or overload current, occurs in the middle voltage network, the current transformer detects it and the vacuum circuit breakers (VCBs) to quickly open and interrupt the fault current (tripping). Recently, electromagnetic actuators are widely used as the operating mechanism for the VCB. In this paper, the numerical study of the possibility of direct tripping of the electromagnetic actuator by the current output of the current transformer. In simulation, the secondary current waveform was calculated by response surface approach. It can take into account the saturation effect of the magnetic core due to high primary current and heavy loads of the secondary circuit. The mechanical behavior of the VCB in time was also simulated by the actuator motion and operating electrical circuit. Finally tripping test by the current transformer output with high primary current was performed.

Adsorption of phenol with silica aerogel-carbon active nanocomposites

Adsorption of phenol with silica aerogel-carbon active nanocomposites

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Part of #Adsorption of phenol with silica aerogel-carbon active nanocomposites# :

Publishing year : 2011

Conference : 7th National Congress of Chemical Engineering

Number of pages : 7

Abstract: Silica aerogel and silica aerogel-carbon active nanocomposites were synthesized using a waterglass precursor and ambient drying method. A continuous operation with reflux was performed for adsorption of aqueous solution of phenol. The adsorption capacity was measured for hydrophobic silica aerogel and various nanocomposites. The adsorption process was performed in both visible light and in the absence of light. The results showed that visible light has a great effect on phenol photolysis. 0.5 and 2% wt nanocomposites were prepared. The results showed that adding a little amount of AC has a significant effect on adsorption capacity.

Simulation of luminescent of excited-state intramolecular proton-transfer dyes based on functionalized bipyridine derivatives

Simulation of luminescent of excited-state intramolecular proton-transfer dyes based on functionalized bipyridine derivatives

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Part of #Simulation of luminescent of excited-state intramolecular proton-transfer dyes based on functionalized bipyridine derivatives# :

Publishing year : 2015

Conference : International Conference on New Research Findings in Science, Engineering and Technology with a Focus on Need-driven Dissertations

Number of pages : 6

Abstract: Four new [2,2-bipyridyl] -3,3-diol (BP (OH) 2) derivative by -CN substituents is recommended as useful modifications of the parent structure. The excited state of the intramolecular proton transfer process (ESIPT) has been described for BP (OH) 2s with the use of computational methods. It has been determined that the two tautomeric forms of BP (OH) 2 exist: in the ground and singlet in the excited state of dienol (DE) and in the lowest triggered triplet state diket (DK). Their photophysical properties of the new compound were studied. The S1-S0 and T1-S0 transition energies of BP (OH) 2s from its DE and DK forms computed. In addition, the occurrence of ESIPT of BP (OH) 2s is supported by the calculated energies of T1-S0 transitions. The -CN substituent effect in BP (OH) 2 on the ESIPT has been investigating and demonstrating a phosphorescence with a large Stokes shift.

Cultural Environment and Sustainable Development: Reference to the Selected Novels of E.M.Forster

Cultural Environment and Sustainable Development: Reference to the Selected Novels of E.M.Forster

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Part of #Cultural Environment and Sustainable Development: Reference to the Selected Novels of E.M.Forster# :

Publishing year : 2014

Conference : International Conference on Sustainable Development, Solutions and Challenges Focusing on Agriculture, Natural Resources, Environment and Tourism

Number of pages : 14

Abstract: Literature is based on human cultures and societies. It can make the process of development happen more quickly and expediting its sustainability. Literature reflects the weak and strong points of cultures that can slow down or accelerate the process of sustainable development. This study aims to investigate the effects of those cultural differences that hinder sustainable relations among the characters of Forsters' novels. The researcher makes use of the comparative methodology to scrutinize the reciprocal relationship between the cultural environment and sustainable development. To conclude, Forsters romances reveal the cultural gaps among the nations that must be filled by mutual understanding and tolerance. His literary works make the readers aware of their faults and help them to promote their personalities and speed up global harmony

On the Possible Flotation of Sarcheshmeh Copper Ore Using Rhamnolipid Biosurfactants: A Statistical Approach

On the Possible Flotation of Sarcheshmeh Copper Ore Using Rhamnolipid Biosurfactants: A Statistical Approach

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Part of #On the Possible Flotation of Sarcheshmeh Copper Ore Using Rhamnolipid Biosurfactants: A Statistical Approach# :

Publishing year : 2012

Conference : Second National Conference on Health, Safety and Environment (HSE)

Number of pages : 5

Abstract: In this study, the flotation performance of a sample of copper ore obtained from Sarcheshmeh Copper Complex was investigated using rhamnolipidbiosurfactant produced by Pseudomonas aeruginosa strain. Rhamnolipid biosurfactant was applied as a frothing reagent in the presence and absence of conventional operating frothers, including methyl isobutyl carbinol (MIBC) and a polypropylene glycol ether with a molecular weight of 264 g / mol (DF-250). Metallurgical and mineralogical results for copper, molybdenum and iron were selected as system responses and evaluated through a time-blocking one-way experimental design. Results showed that the flotation performance of copper and molybdenum minerals decreases as rhamnolipid concentration increased. In contrast, the addition of rhamnolipids improved the performance of iron minerals due to the high foaming power of the rhamnolipid product and the possible positive interaction between rhamnolipid molecules and iron minerals surfaces.

The Effect of MWCNT on the Mechanical and Electrical Properties of HDPE/MWCNT Nanocomposite

The Effect of MWCNT on the Mechanical and Electrical Properties of HDPE/MWCNT Nanocomposite

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Part of #The Effect of MWCNT on the Mechanical and Electrical Properties of HDPE/MWCNT Nanocomposite# :

Publishing year : 2011

Conference : 7th National Congress of Chemical Engineering

Number of pages : 8

Abstract: In this study, the development of a method for the preparation of multiwalled carbon nanotube (MWCNT) reinforced high density polyethylene (HDPE) nanocomposites based on high energy ball milling (HEBM) with consequent improvement of the electrical and mechanical properties of samples Was aimed In this regard, HEBM was used as an innovative process to incorporate MWCNTs into a HDPE matrix at room temperature without any solvent, ultrasonication, chemical modification or physical treatment of nanotubes. HDPE / MWCNT nanocomposites with 1, 2, 3, 5, and 10 wt% of MWCNTs were prepared. After that, the effect of MWCNT loading on the mechanical and electrical properties of nanocomposites was investigated. The MWCNT / HDPE nanocomposites showed a significant increase in electrical conductivity with increasing MWCNT loading and percolation threshold of about 3 wt%. The volume resistance of HDPE was reduced by 8 orders of magnitude, from 1017 to 109 .cm. The tensile test also showed a 48% increase in Young's modulus (from 722.19 MPa to 1066.4 MPa), an increase in yield stress from 8.65 to 9.13 MPa, and a ultimate tensile strength of 19.67 to 22.1 MPa due to 5-10 wt% addition of MWCNT into HDPE

ISO 9004:2000 – Roadmap to Business Excellence and Quality Awards

ISO 9004:2000 – Roadmap to Business Excellence and Quality Awards

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Part of #ISO 9004:2000 – Roadmap to Business Excellence and Quality Awards# :

Publishing year : 2004

Conference : Fifth International Conference of Quality Managers

Number of pages : 9

Abstract: K K Pasrija is an Electronics and Communication Engineer with management qualification. He has worked in a standardization organization and is currently working as General Manager (Training) at ICL Certification Limited, New Delhi (India). He is a Lead Auditor and Tutor for Quality and Environment. He has gained expertise in the integration of quality and environmental management systems.
The goal of overall business performance and management systems is business excellence. Business excellence means a balanced business performance, including business processes, customer focus and financial, innovative and learning perspectives. The overall business performance is based on business activities and their results. When considering business performance, both activity and its results are taken into account.
The business world has become competitive due to the changing environment related to economic development, communications, consumer preferences and concern for sustainability. An organization has to identify and meet the needs and expectations of its customers and other interested parties in order to achieve competitive advantage and improve overall organizational performance and capabilities. The organization has to set its own standards of performance in order to become a world class establishment.
Different quality awards models have been developed in many countries. The American Malcolm Baldrige Model and European Quality Award (EFQM) models are generally considered to be matured and effective. Many other national models like the Iranian National Quality Award are based on these.

Analysis of bending moments in surface effect ship structure

Analysis of bending moments in surface effect ship structure

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Part of #Analysis of bending moments in surface effect ship structure# :

Publishing year : 2005

Conference : Second conference of thin-walled structures

Number of pages : 9

Abstract: Surface Effect Ship (SES) is an airborne marine vehicle that is strongly supported by a contiuously generated air in the air at a higher ambient atmosphere. The pressure is forced from the lift into the recessed base, where it forms an air bag. raises the craft. In this article, the reduction of the longitudinal bending moment of the SES model has been analyzed. These results are used to investigate the external forces on the air cushion vehicle and the evaluation of the bending moment and the curing forces applied to the air – marine hulf during motion.