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- Ajit Behera (31)
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Articles 1 - 30 of 227
Full-Text Articles in Engineering
Fabrication Of Micro-Meltblown Filtration Media Using Parallel Plate Die Design, Mohammad A. Hassan
Fabrication Of Micro-Meltblown Filtration Media Using Parallel Plate Die Design, Mohammad A. Hassan
Mohammad Abouelreesh Hassan
Meltblown fibers are typically produced using a die technology based on the slot concept, an extension of the sheet die technology with a series of holes substituting the center rectangular slot of the sheet die. While this prevalent technology has met with considerable success, an economical, facile design would be desirable. In this study a new parallel plate die concept to fabricate micro-meltblown fibers that offers simplicity, ease of use, and low cost was examined. The new die concept had parallel plates forming channels for polymer melt to flow through with a set of air holes surrounding them. This die …
Evaluation Of Biofield Energy Treatment On Physical And Thermal Characteristics Of Selenium Powder, Mahendra Kumar Trivedi, Rama Mohan Tallapragada, Dahryn Trivedi, Alice Branton, Gopal Nayak, Omprakash Latiyal, Snehasis Jana
Evaluation Of Biofield Energy Treatment On Physical And Thermal Characteristics Of Selenium Powder, Mahendra Kumar Trivedi, Rama Mohan Tallapragada, Dahryn Trivedi, Alice Branton, Gopal Nayak, Omprakash Latiyal, Snehasis Jana
Mahendra Kumar Trivedi
Selenium (Se) is an essential trace element, and its deficiency in the humans leads to increase the risk of various diseases, such as cancer and heart diseases. The objective of this study was to investigate the influence of biofield energy treatment on the physical and thermal properties of the selenium powder. The selenium powder was divided into two parts denoted as control and treated. The Control part was remained as untreated and treated part received Mr. Trivedi’s biofield energy treatment. Both control and treated selenium samples were characterized using x-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetric analysis - differential …
A Study Of The Electrochemical Dissolution And Passivation Phenomenon Of Roasted Gold Ore In Cyanide Solutions, Ahmet Deniz Bas, Wei Zhang, Edward Ghali, Yeonuk Choi
A Study Of The Electrochemical Dissolution And Passivation Phenomenon Of Roasted Gold Ore In Cyanide Solutions, Ahmet Deniz Bas, Wei Zhang, Edward Ghali, Yeonuk Choi
Ahmet Deniz Bas
No abstract provided.
A Study Of Electrochemical Interactions Between Gold And Its Associated Oxide Minerals, Ahmet Deniz Bas, Edward Ghali, Yeonuk Choi
A Study Of Electrochemical Interactions Between Gold And Its Associated Oxide Minerals, Ahmet Deniz Bas, Edward Ghali, Yeonuk Choi
Ahmet Deniz Bas
There is a lack of electrochemical studies of oxidized gold ores since the majority of previous studies were conducted with sulphidic gold ores. In this study, the influence of agitation and iron oxide minerals, i.e. magnetite, hematite, and maghemite on gold leaching was investigated by means of galvanic and passivation phenomena. Cyclic voltammetry studies of Roasted Gold Ore (RGO) in de-aerated electrolyte have shown one oxidation and one reduction reaction while three oxidation and one reduction peaks were observed with gold electrode. Galvanic coupling results by Zero Resistance Ammeter (ZRA) mode indicated that magnetite showed a negative effect on gold …
Experimental Evaluation Of Tensile Strength And Young’S Modulus Of Woven Jute Fiber And Polyurethane Composite, Shrikant Shinde, A. V. Salve
Experimental Evaluation Of Tensile Strength And Young’S Modulus Of Woven Jute Fiber And Polyurethane Composite, Shrikant Shinde, A. V. Salve
Innovative Research Publications IRP India
Natural fiber reinforced composites (NFRCs) are increasingly used in a variety of commercial applications, but there has been little theoretical, micromechanical modeling of structure/property relationships in these materials. These can’t be met by conventional metal alloys. The scope of possible uses of natural fibers is enormous.Plenty of research work is done on natural fiber composites. But, woven jute fiber and bio based polyurethane resin matrix is not used extensively for research studies. Mostly mathematical model is used to investigate and predict the properties and fiber loads effect on mechanical properties. The combination of jute fiber with PU produced the material …
Metallurgical Chemistry, Fathi Habashi
Metallurgical Chemistry, Fathi Habashi
Fathi Habashi
Metallurgical chemistry is the most ancient science of chemistry. It is related to the recovery of metals from ores and their refining. In its modern form, it involves separation of finely ground minerals by flotation, melting of ores, aqueous processing of ores, and the application of electric current to separate and purify metals from aqueous solution or from a fused salt. Metallurgical chemistry is closely related to the chemical industry.
Hydrometallurgy Of Phosphate Rock And The Recovery Of Uranium, Fathi Habashi
Hydrometallurgy Of Phosphate Rock And The Recovery Of Uranium, Fathi Habashi
Fathi Habashi
Phosphate rock of sedimentary origin contains on the average 0.01 % uranium. Since large tonnage of this rock is used annually to produce fertilizers, this represented an important potential source of uranium. Before the discovery of rich uranium deposits this source was developed on industrial scale. The production of phosphoric acid by sulfuric acid process is at present facing the problem of disposal of gypsum; about 1.5 tons of gypsum is produced per ton of rock processed. This material contains all the radium originally present in the rock which results from the radioactive decay of uranium. As a result, phospho-gypsum …
Under Sleeper Pads: Field Investigation Of Their Role In Detrimental Impact Mitigation, Sakdirat Kaewunruen, Alex M. Remennikov
Under Sleeper Pads: Field Investigation Of Their Role In Detrimental Impact Mitigation, Sakdirat Kaewunruen, Alex M. Remennikov
Sakdirat Kaewunruen
Under sleeper pads (USPs) are the component installed under the concrete sleepers generally to improve railway track resilience. Initial development in Europe, particularly in Austria, has encouraged the adoption of the component around the world. In practice, the component has commonly been used in certain applications, mainly to moderate track stiffness in special locations such as turnouts, crossings, and level crossing. In heavy haul operation, the heavier wagons result in sturdier bogie structures, higher unsprung mass, and then higher level of wheel-rail interaction forces. Accordingly, the application of USPs to mitigate detrimental impact load consequence on track structure is presented …
Production Of Greenhouse Gas Free Hydrogen By Thermocatalytic Decomposition Of Methane – A Review, Upm Ashik, Wma Wan Daud, Hf Abbas
Production Of Greenhouse Gas Free Hydrogen By Thermocatalytic Decomposition Of Methane – A Review, Upm Ashik, Wma Wan Daud, Hf Abbas
upm ashik
Thermocatalytic decomposition of methane (TCD) is a fully green single step technology for producing hydrogen and nano-carbon. This review studying all development in laboratory-scale research on TCD, especially the recent advances like co-feeding effect and catalyst regeneration for augmenting the productivity of the whole process. Although a great success on the laboratory-scale has been fulfilled, TCD for greenhouse gas (GHG) free hydrogen production is still in its infancy. The need for commercialization of TCD is greater than ever in the present situation of huge GHG emission. TCD usually examined over various kind of catalysts, such as monometallic, bimetallic, trimetallic, combination …
Driving Force For Binary Alloy Solidification Under Far From Local Equilibrium Conditions, Sergey Sobolev
Driving Force For Binary Alloy Solidification Under Far From Local Equilibrium Conditions, Sergey Sobolev
Sergey Sobolev
No abstract provided.
Söyleşi- Rauf H Eric, Güney Afrika'da Madencilik Ve Metal Kazanımı (Interview With Rauf H Eric, Mining And Metal Extraction In South Africa), Ahmet Deniz Bas
Söyleşi- Rauf H Eric, Güney Afrika'da Madencilik Ve Metal Kazanımı (Interview With Rauf H Eric, Mining And Metal Extraction In South Africa), Ahmet Deniz Bas
Ahmet Deniz Bas
No abstract provided.
On The Importance Of Surface Chemistry And Composition Of Bone Char For The Sorption Of Heavy Metals From Aqueous Solution, Didilia I. Mendoza-Castillo, Adrian Bonilla-Petriciolet, Juan Jáuregui-Rincón
On The Importance Of Surface Chemistry And Composition Of Bone Char For The Sorption Of Heavy Metals From Aqueous Solution, Didilia I. Mendoza-Castillo, Adrian Bonilla-Petriciolet, Juan Jáuregui-Rincón
Adrian Bonilla-Petriciolet
This paper reports new insights on the role of the inorganic composition of bone char on its sorption properties for the removal of heavy metals Cd2+, Ni2+ and Zn2+ ions from aqueous solution. In particular, we showed the importance of both composition and surface chemistry of bone char on its sorption properties for the removal of these metal ions in aqueous solution. Results of physicochemical characterization and sorption studies suggest that the inorganic phase of bone char may contribute from 60 to 92% of the sorption process of heavy metals in aqueous solution. In particular, the ion exchange process of …
Improvement Of Silver Extraction By Ultra–Fine Grinding Prior To Cyanide Leaching Of The Plant Tailings Of A Refractory Silver Ore, Oktay Celep, Ahmet Deniz Bas, Ersin Y. Yazici, Ibrahim Alp, Haci Deveci
Improvement Of Silver Extraction By Ultra–Fine Grinding Prior To Cyanide Leaching Of The Plant Tailings Of A Refractory Silver Ore, Oktay Celep, Ahmet Deniz Bas, Ersin Y. Yazici, Ibrahim Alp, Haci Deveci
Ahmet Deniz Bas
No abstract provided.
Treatment Of A Copper-Rich Gold Ore By Cyanide Leaching, Ammonia Pretreatment And Ammoniacal Cyanide Leaching, Ahmet Deniz Bas, Elif Koc, Ersin Y. Yazici, Haci Deveci
Treatment Of A Copper-Rich Gold Ore By Cyanide Leaching, Ammonia Pretreatment And Ammoniacal Cyanide Leaching, Ahmet Deniz Bas, Elif Koc, Ersin Y. Yazici, Haci Deveci
Ahmet Deniz Bas
No abstract provided.
Electrochemical Dissolution Of Roasted Gold Ore In Cyanide Solutions, Ahmet Deniz Bas, Liliana Gavril, Wei Zhang, Edward Ghali, Yeonuk Choi
Electrochemical Dissolution Of Roasted Gold Ore In Cyanide Solutions, Ahmet Deniz Bas, Liliana Gavril, Wei Zhang, Edward Ghali, Yeonuk Choi
Ahmet Deniz Bas
No abstract provided.
Active And Passive Behaviours Of Gold In Cyanide Solutions, Ahmet Deniz Bas
Active And Passive Behaviours Of Gold In Cyanide Solutions, Ahmet Deniz Bas
Ahmet Deniz Bas
No abstract provided.
Nanotechnology Companies In The United States: A Web-Based Content Analysis Of Companies And Products For Poverty Alleviation, Thomas Woodson
Nanotechnology Companies In The United States: A Web-Based Content Analysis Of Companies And Products For Poverty Alleviation, Thomas Woodson
Thomas Woodson
This study analyzes the goals, nanotechnology experience, corporate social responsibility and products of 50 USA-based companies working with nanotechnology to see if they are developing products that help low-income populations. Out of the top 50 R&D companies that publish and patent nanotechnology research in agri-food, energy and water sectors, 18 of them do not mention nanotechnology on their websites. The other 32 companies discuss nanotechnology in varying degrees. However, only two of the companies relate their nanotechnology R&D to poverty alleviation. Even though few companies refer to poverty alleviation, 30 firms of the sample have some type of corporate social …
Effect Of Variant Strain Accommodation On The Three-Dimensional Microstructure Formation During Martensitic Transformation: Application To Zirconia, Mahmood Mamivand, Mohsen Asle Zaeem, Haitham El Kadiri
Effect Of Variant Strain Accommodation On The Three-Dimensional Microstructure Formation During Martensitic Transformation: Application To Zirconia, Mahmood Mamivand, Mohsen Asle Zaeem, Haitham El Kadiri
Mohsen Asle Zaeem
No abstract provided.
Quantitative Modeling Of The Equilibration Of Two-Phase Solid-Liquid Fe By Atomistic Simulations On Diffusive Time Scales, Ebrahim Asadi, Mohsen Asle Zaeem, Sasan Nouranian, Michael Baskes
Quantitative Modeling Of The Equilibration Of Two-Phase Solid-Liquid Fe By Atomistic Simulations On Diffusive Time Scales, Ebrahim Asadi, Mohsen Asle Zaeem, Sasan Nouranian, Michael Baskes
Mohsen Asle Zaeem
No abstract provided.
Surface Hardness Of Friction Stir Welded Aa6063 Pipe, Azman Ismail, Mokhtar Awang
Surface Hardness Of Friction Stir Welded Aa6063 Pipe, Azman Ismail, Mokhtar Awang
AZMAN ISMAIL
The external surface hardness of friction stir welded aluminum alloy 6063 pipe joint was investigated in this paper. The 89mm of outside diameter pipe with 5mm of wall thickness was used as test pipe piece for this experiment on closed butt joint configuration by utilising Bridgeport 2216 CNC milling machine and orbital clamping unit specially designed to cater for this task and function. Several welded samples were produced on varying process parameters which were successfully joined by using a non-consumable tool with a flat shoulder and a cylindrical pin.
Surface Hardness Of Friction Stir Welded Aa6063 Pipe, Azman Ismail, Mokhtar Awang
Surface Hardness Of Friction Stir Welded Aa6063 Pipe, Azman Ismail, Mokhtar Awang
Azman Ismail
The external surface hardness of friction stir welded aluminum alloy 6063 pipe joint was investigated in this paper. The 89mm of outside diameter pipe with 5mm of wall thickness was used as test pipe piece for this experiment on closed butt joint configuration by utilising Bridgeport 2216 CNC milling machine and orbital clamping unit specially designed to cater for this task and function. Several welded samples were produced on varying process parameters which were successfully joined by using a non-consumable tool with a flat shoulder and a cylindrical pin.
Think Outside The Box: New Materials, Design Application, And Performance Of Railway Turnout Bearers, Sakdirat Kaewunruen
Think Outside The Box: New Materials, Design Application, And Performance Of Railway Turnout Bearers, Sakdirat Kaewunruen
Sakdirat Kaewunruen
Railway turnout systems are a main feature in railway tracks. There are two types of turnout support structures, which can be designed to be either a slab or a cluster of discrete bearers. The choice of turnout support system depends on asset management strategy of the rail operators or maintainers. This paper will focus on the discrete turnout bearer system where turnout alignments, settlement and deformation are comparatively more flexible and retrievable by routine ballast tamping. It embraces the consideration of new materials for use as a turnout bearer. Traditional bearer materials are timber, steel, and concrete. Recent developments have …
History Of Innovation In Extractive Metallurgy, Fathi Habashi
History Of Innovation In Extractive Metallurgy, Fathi Habashi
Fathi Habashi
People learned melting of ores to get metals since ancient times but the use of aqueous solutions for this purpose was introduced relatively recently in the Middle Ages. The most recent technology, however, came when electric current became available on commercial scale towards the middle of the nineteenth century. The present article records in general terms the development in pyro- , hydro-, and electrometallurgy
Criterion For An Oscillatory Charged Jet During The Bubble Spinning Process, Ji-Huan He, H.Y. Kong
Criterion For An Oscillatory Charged Jet During The Bubble Spinning Process, Ji-Huan He, H.Y. Kong
Ji-Huan He
The oscillatory diameter of the charged jet during the bubble electrospinning results in beads on the obtained nanofibers. We demonstrate that the applied voltage and the initial flow rate of the jet are the crucial parameters that are necessary to control morphology of the nanofibers. We also find that there is a criterion for production of smooth nanofibers without beads. The theory developed in this paper can be extended to the classical electrospinning and the blown bubble-spinning.
Evidence Of The Existence Of Cathodic And Anodic Zones During The Leaching Of Minerals And Metals, Fathi Habashi, Ahmet Deniz Bas
Evidence Of The Existence Of Cathodic And Anodic Zones During The Leaching Of Minerals And Metals, Fathi Habashi, Ahmet Deniz Bas
Ahmet Deniz Bas
No abstract provided.
Treatment Of Manufacturing Scrap Tv Boards By Nitric Acid Leaching, Ahmet Deniz Bas, Haci Deveci, Ersin Y. Yazici
Treatment Of Manufacturing Scrap Tv Boards By Nitric Acid Leaching, Ahmet Deniz Bas, Haci Deveci, Ersin Y. Yazici
Ahmet Deniz Bas
No abstract provided.
Removal Of Iron As Goethite From Leach Solutions Of Waste Of Printed Circuit Boards (Wpcb), Ersin Y. Yazici, Ahmet Deniz Bas, Haci Deveci
Removal Of Iron As Goethite From Leach Solutions Of Waste Of Printed Circuit Boards (Wpcb), Ersin Y. Yazici, Ahmet Deniz Bas, Haci Deveci
Ahmet Deniz Bas
No abstract provided.
Hydrometallurgy Over The Years (Geçmişten Günümüze Hidrometalurji), Ahmet Deniz Bas, Ersin Y. Yazici, Oktay Celep
Hydrometallurgy Over The Years (Geçmişten Günümüze Hidrometalurji), Ahmet Deniz Bas, Ersin Y. Yazici, Oktay Celep
Ahmet Deniz Bas
No abstract provided.
A Life Dedicated To Metallurgy : Fathi Habashi (In Turkish), Ahmet Deniz Bas
A Life Dedicated To Metallurgy : Fathi Habashi (In Turkish), Ahmet Deniz Bas
Ahmet Deniz Bas
No abstract provided.
Thermal Characterisation Of Poly(Methyl Methacrylate) Filled With Barium Titanate As Denture Base Material, Nidal Elshereksi
Thermal Characterisation Of Poly(Methyl Methacrylate) Filled With Barium Titanate As Denture Base Material, Nidal Elshereksi
Nidal Elshereksi
No abstract provided.