Calibration Of Numerical Model For Shoreline Change Prediction Using Satellite Imagery Data,
2015
Department of Civil Engineering, Universitas Riau, Pekanbaru 28293, Indonesia
Calibration Of Numerical Model For Shoreline Change Prediction Using Satellite Imagery Data, Sigit Sutikno, Keisuke Murakami, Dwi Puspo Handoyo, Manyuk Fauzi
Makara Journal of Technology
This paper presents a method for calibration of numerical model for shoreline change prediction using satellite imagery data in muddy beach. Tanjung Motong beach, a muddy beach that is suffered high abrasion in Rangsang Island, Riau province, Indonesia was picked as study area. The primary numerical modeling tool used in this research was GENESIS (GENEralized Model for Simulating Shoreline change), which has been successfully applied in many case studies of shoreline change phenomena on a sandy beach.The model was calibrated using two extracted coastlines satellite imagery data, such as Landsat-5 TM and Landsat-8 OLI/TIRS. The extracted coastline data were analyzed …
Independency Of Elasticity On Residual Stress Of Room Temperature Rolled Stainless Steel 304 Plates For Structure Materials,
2015
Center for Science and Technology of Advance Materials, National Nuclear Energy Agency, Banten 15314, Indonesia
Independency Of Elasticity On Residual Stress Of Room Temperature Rolled Stainless Steel 304 Plates For Structure Materials, Parikin Parikin, David Allen
Makara Journal of Technology
Mechanical strengths of materials are widely expected in general constructions of any building. These properties depend on its formation (cold/hot forming) during fabrication. This research was carried out on cold-rolled stainless steel (SS) 304 plates, which were deformed to 0, 34, 84, and 152% reduction in thickness. The tests were conducted using Vickers method. Ultra micro indentation system (UMIS) 2000 was used to determine the mechanical properties of the material, i.e.: hardness, modulus elasticity, and residual stresses. The microstructures showed lengthening outcropping due to stress corrosion cracking for all specimens. It was found that the tensile residual stress in a …
Oxidation Process Of H 2 O /Uv For Cod Reduction Of Wastewater From Soybean Tofu Production,
2015
Department of Chemical Engineering, Faculty of Engineering, Universitas Syiah Kuala Darussalam, Banda Aceh 23111, Indonesia
Oxidation Process Of H 2 O /Uv For Cod Reduction Of Wastewater From Soybean Tofu Production, Komala Pontas, Abrar Muslim
Makara Journal of Technology
Chemical Oxygen Demand (COD) reduction of wastewater from soybean tofu production was studied by conducting advanced oxidation process (AOP) using hydrogen peroxide with UV radiation catalysts in a closed cylindrical glass reactor. The hydroxyl radical (*OH) concentration from H2O2 decomposition was modeled, and exponential trends were found for the *OH concentration over radiation time and operation temperature. As a result, it was found that the maximal *OH concentration was 0.209 mol L-1 at 240 minutes and 50 °C. The *OH concentration exponentially increased following rise in operation temperature. The H2O2/UV AOP application reduced COD concentration to approximately 42.41% from 10,545 …
Uplift Of Shoreline Regions On Pagai Island Due To The September 12, 2007 Mw 8.4 Earthquake Captured By Sar Image,
2015
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Bengkulu, Bengkulu 38371, Indonesia
Uplift Of Shoreline Regions On Pagai Island Due To The September 12, 2007 Mw 8.4 Earthquake Captured By Sar Image, Ashar Muda Lubis
Makara Journal of Technology
At least 25 people were killed by the September 12, 2007 Mw 8.4 Bengkulu earthquake, and many buildings were destroyed in Bengkulu and West Sumatra provinces. It is very important to estimate the earth surface deformation due to the earthquake to understand the rupture size and its process. The aim of this research is to estimate the shoreline change and vertical displacement on Pagai Island associated with the September 12, 2007 Mw 8.4 Bengkulu earthquake. The intensity of ALOS-PALSAR satellite images is used to access the pattern of displacement. The result shows that Pagai Island demonstrated huge uplift due to …
Effect Of Fly Ash Fortification In The Manufacture Process Of Making Concrete Towards Characteristics Of Concrete In Sulfuric Acid Solution,
2015
Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, Depok 16424, Indonesia
Effect Of Fly Ash Fortification In The Manufacture Process Of Making Concrete Towards Characteristics Of Concrete In Sulfuric Acid Solution, Asep Handaya Saputra, Muhammad Shohibi, Masatoshi Kubouchi
Makara Journal of Technology
Fly ash is a silica or alumino silica material that can be used as a constituent of cement in the concrete manufacturing process. Utilization of fly ash aims to improve durability and minimize the reduction of concrete’s compressive strength exposed to an acidic environment, which can be achieved through the pozzolanic reaction of fly ash with Ca(OH)2 within concrete. The reduced content of Ca(OH)2 through pozzolanic reaction will minimize the tendency of ettringite formation (compounds that cause deterioration and decrease the compressive strength of concrete). In order to determine the relation between fly ash replenishment into concrete with concrete’s characteristics …
Fully Magnetic Printing By Generation Of Magnetic Droplets On Demand With A Coilgun,
2015
Clemson University
Fully Magnetic Printing By Generation Of Magnetic Droplets On Demand With A Coilgun, Vladislav Vekselman, Luke Sande, Konstantin G. Kornev
Publications
In this paper, we exhibit a coilgun-based approach to drop-on-demand printing of liquids laden with magnetic particles. In contrast to other drop-on-demand technologies designed to print droplets only in gaseous environments, this methodology allows one to print magnetic droplets inside any gaseous or liquid media using the same coilgun. Furthermore, we demonstrate the basic principles of magnetic drop-on-demand generation and show the physico-chemical parameters controlling the process.
Studying An All-Vanadium Photoelectrochemical Cell For Highly Efficient Solar Energy Conversion And Storage Via Photocatalytic Redox Reaction,
2015
University of Texas at Arlington
Studying An All-Vanadium Photoelectrochemical Cell For Highly Efficient Solar Energy Conversion And Storage Via Photocatalytic Redox Reaction, Dong Liu
Material Science and Engineering Dissertations - Archive
This study aims at developing a promising alternative approach to utilize solar energy continuously with high efficiency by employing photocatalytic vanadium redox reactions to overcome major drawbacks associated with conventional photoelectrochemical water splitting. The preliminary study was implemented on TiO2 and WO3/TiO2 by linear sweep voltammetry (LSV), cyclic voltammetry (CV) and zero-resistance ammetry (ZRA) in a photoelectrochemical cell (PEC). The results show much enhanced photoelectrochemical response with the assistance of vanadium(IV, VO2+) redox species. Such photoresponse improvement is attributed to the hole scavenging effect by fast vanadium redox reaction to depress charge recombination at semiconductor/liquid interface in both TiO2 and …
Magnetic-Plasmonic Multilayered Nanorods,
2015
University of Texas at Arlington
Magnetic-Plasmonic Multilayered Nanorods, Orathai Thumthan
Material Science and Engineering Dissertations - Archive
Multilayered nanorods which consist of alternating magnetic layers separated by Au layers combine two distinctive properties, magnetic properties and surface plasmonic resonance (SPR) properties into one nano-entity. Their magnetic properties are tunable by changing the layer thickness, varying from single domain to superparamagnetic state. Superparamagnetic is a key requirement for magnetic nanoparticles for bioapplications. Superparamagnetic nanoparticles exhibit high magnetic moments at low applied magnetic field while retain no magnetic moments when magnetic field is removed preventing them from aggregation due to magnetic attraction. Au layers in the nanorods provide anchorage sites for functional group attachment. Also, Au nanodisks exhibit SPR …
Comprehensive Study Of Composition Gradient Strontium Doped Lanthanum Manganite Thin Films Deposited By Magnetron Co-Sputtering,
2015
University of Texas at Arlington
Comprehensive Study Of Composition Gradient Strontium Doped Lanthanum Manganite Thin Films Deposited By Magnetron Co-Sputtering, Yishu Wang
Material Science and Engineering Dissertations - Archive
In this body of work, the examination of three different types of Strontium doped lanthanum manganite thin films synthesized by magnetron sputtering in the Surface and Nano Engineering Laboratory (SaNEL) allowed for the development of a detailed understanding between the processing conditions, the nano-scale structure and strain relaxation of the as-deposited thin films. Pure Lanthanum manganite and strontium doped lanthanum manganite thin films which were epitaxially grown on (001) single crystalline lanthanum alumina (LAO) and magnesium oxide (MgO) were fabricated by using single target deposition. The optimum deposition conditions were explored as preparation for synthesis epitaxial composition gradient strontium doped …
Guanidinium Based Anion Exchange Membranes For Solid Polymer Alkaline Fuel Cell Applications,
2015
University of Texas at Arlington
Guanidinium Based Anion Exchange Membranes For Solid Polymer Alkaline Fuel Cell Applications, Syed Dawar Sajjad
Material Science and Engineering Dissertations - Archive
Low temperature traditional PEM Fuel Cells and also other fuel cells in general suffer from the acute yet long standing issues of cost and performance. This has severely hindered the commercialization of fuel cells but Alkaline Anion Exchange Membrane Fuel Cells (AAEMFCs) pose as a breakthrough technology by offering improved conversion efficiency (a virtue of fast kinetics in the alkaline media) and the lower costs (from the prospect of using non-noble metal catalysts). However, before systematic testing of non-noble metal catalysis is tested on this system, it is imperative to develop a reliable anion exchange membrane which lies at the …
Interface Reaction Induced Stress Development In An Aluminum Thin Film Copper Bulk Plate Diffusion Couple,
2015
University of Texas at Arlington
Interface Reaction Induced Stress Development In An Aluminum Thin Film Copper Bulk Plate Diffusion Couple, Michael Codie Mishler
Material Science and Engineering Theses - Archive
This thesis investigates the mechanism of the interface reaction induced intermetallic phase formation (IMC) and its impact on the interface reliability in Al-Cu diffusion couple pairing. This study is motivated by the accelerated failure experiments in lead frame to integrated circuit (IC) package wire-bonds using copper (Cu) wire and aluminum (Al) bond-pad that have shown failure most often occurs at the interface of the intermetallic compound (IMC) γ2-phase (Cu9Al4). In order for simulative investigation, we created a diffusion couple consisting of Cu bulk plate coated pure Al thin films with thickness of ~2µm. This configuration is adapted to resemble the …
Influence Of The Volume-Contact Area Ration On The Growth Behavior Of The Cu-Sn Intermetallic Phase,
2015
University of Texas at Arlington
Influence Of The Volume-Contact Area Ration On The Growth Behavior Of The Cu-Sn Intermetallic Phase, Venkatakamakshi Supraja Giddaluri
Material Science and Engineering Theses - Archive
Solder Joints play a very important role in electronic packaging industry by serving as mechanical support and provides integrity to the device. The increasing demand for high performance, environmental and economic feasibility and miniaturization led to the development of high density interconnects. With the reduction in the size/stand off height of the solder is the reliability issues in the surface mount assemblies and packaging structures under various rigorous environments. One of the most important impact factors that affect the solder joint reliability is the growth rate IMC formed between the solder and substrate. IMC formation is required to ensure good …
Solution Processed Optical Coatings For Solar Cell Applications,
2015
University of Texas at Arlington
Solution Processed Optical Coatings For Solar Cell Applications, Rajesh Tummala
Material Science and Engineering Theses - Archive
In the recent past the demand for higher energy conversion efficiency of solar cells is on the rise. Extensive research is carrying out and many new methods have been proposed by changing either fabrication process or implementation of anti-reflection coatings. In this thesis, the solution processed omni directional anti-reflection coatings have been demonstrated on commercial amorphous silicon solar cells and on fabricated organic solar cells. A simple convective coating technique is utilized to deposit spherical silica micro-particles on the commercial amorphous silicon solar cells and on fabricated organic solar cells. In order to investigate the behavior of solar cells at …
An Open-Source, Automated Chemical Vapor Deposition System For The Production Of 2d Materials,
2015
Boise State University
An Open-Source, Automated Chemical Vapor Deposition System For The Production Of 2d Materials, Dale Brown
Boise State University Theses and Dissertations
While interest in two-dimensional materials has exploded in recent years, the high cost of chemical vapor deposition (CVD) systems can act as a barrier to entry for some researchers interested in studying these materials. This thesis presents an open-source design for an automated CVD that can be built for a fraction of the cost of similarly capable commercial systems and that can easily be customized and expanded.With a CVD built as described,growth of high quality graphene and graphene foam is demonstrated.These results highlight the flexibility of the open-source design in producing a variety of nanomaterials, which are at the forefront …
Electrolyte Optimization Study For Tio2 Nanotube Electrode In Sodium Ion Batteries,
2015
Boise State University
Electrolyte Optimization Study For Tio2 Nanotube Electrode In Sodium Ion Batteries, Richard Wendel Cutler
Boise State University Theses and Dissertations
Batteries are ubiquitous in daily life. Sodium-ion batteries have the potential to become inexpensive alternatives to the current market products such as Lithium-ion batteries. TiO2 nanotubes have proven potential as an anode for Na-ion batteries. Electrolytes made by NaClO4 salt and carbonate-based solvents make up commonly used electrolytes in sodium ion battery research. We used electrochemical and physical characterization tests to evaluate the optimum electrolyte for this anode material in the Na system. We determined that the ClO4- ion decomposes at the TiO2 surface and promotes the formation of an unstable solid electrolyte interphase. A …
Plastic Deformation And Effective Strain Hardening Coefficient Of Irradiated Fe-9wt%Cr Ods Alloy By Nano-Indentation And Tem,
2015
Boise State University
Plastic Deformation And Effective Strain Hardening Coefficient Of Irradiated Fe-9wt%Cr Ods Alloy By Nano-Indentation And Tem, Corey Kenneth Dolph
Boise State University Theses and Dissertations
The objective of this study is to characterize changes in the yielding, and effective strain hardening coefficient of an oxide dispersion strengthened (ODS) alloy upon exposure to irradiation. It is well known that irradiation produces a supersaturation of defects, which alters the mechanical properties of a material. In order to engineer materials for use in advanced nuclear reactors, the long-term effects of neutron irradiation on mechanical performance must be understood. However, high-dose neutron exposure is often simulated using ion bombardment. Unfortunately, ion irradiation results in a shallow damage layer that prevents traditional bulk mechanical characterization methods from being utilized. A …
Nanoparticle-Bridge Assay For Amplification-Free Electrical Detection Of Oligonucleotides,
2015
University of Texas at Arlington
Nanoparticle-Bridge Assay For Amplification-Free Electrical Detection Of Oligonucleotides, Manouchehr Teimouri
Material Science and Engineering Dissertations - Archive
The aim of this research is to investigate a highly sensitive, fast, inexpensive, and field-applicable amplification-free nanoparticle-based oligonucleotide detection method which does not rely on any enzymatic or signal amplification process. In this approach, target oligonucleotide strands are detected through the formation of nanoparticle satellites which make an electrical path between two electrodes. This method enables an extremely sensitive oligonucleotide detection because even a few oligonucleotide strands can form a single nanoparticle satellite which can solely generates an electrical output signal. Results showed that this oligonucleotide detection method can detect oligonucleotide single strands at concentrations as low as 50 femtomolar …
Material Changes Of Bone Following Ishcemia Of The Immature Femoral Head,
2015
University of Texas at Arlington
Material Changes Of Bone Following Ishcemia Of The Immature Femoral Head, Olumide O. Aruwajoye
Material Science and Engineering Dissertations - Archive
Legg-Calvé-Perthes disease (LCPD) is a childhood hip disorder resulting from the loss of blood flow to the femoral head. In severe cases of the disease, the femoral head can develop a flattening deformity; additionally, if the disease is diagnosed at a later stage, it leaves most patients to develop early osteoarthritis of the hip. Due to a lack of pathological specimen from patients, an experimental piglet model of femoral head ischemia was developed. The model closely follows the radiographic changes seen in LCPD patients, where there is subchondral fracture, resorption, and a flattening deformity of the femoral head. After ischemia, …
Process Development For Compression Molding Of Hybrid Continuous And Chopped Carbon Fiber Prepreg For Production Of Functionally Graded Composite Structures,
2015
California Polytechnic State University, San Luis Obispo
Process Development For Compression Molding Of Hybrid Continuous And Chopped Carbon Fiber Prepreg For Production Of Functionally Graded Composite Structures, Corinne Marie Warnock
Master's Theses
Composite materials offer a high strength-to-weight ratio and directional load bearing capabilities. Compression molding of composite materials yields a superior surface finish and good dimensional stability between component lots with faster processing compared to traditional manufacturing methods. This experimental compression molding capability was developed for the ME composites lab using unidirectional carbon fiber prepreg composites. A direct comparison was drawn between autoclave and compression molding methods to validate compression molding as an alternative manufacturing method in that lab. A method of manufacturing chopped fiber from existing unidirectional prepreg materials was developed and evaluated using destructive testing methods. The results from …
Effect On Mechanical Properties Of Aluminium Alloy Composites On Adding Ash As Reinforcement Material,
2015
Chulalongkorn University
Effect On Mechanical Properties Of Aluminium Alloy Composites On Adding Ash As Reinforcement Material, Mohd Zafaruddin Khan, Mohd Anas, Ather Hussain, Md Irshadul Haque, Kamran Rasheed
Journal of Metals, Materials and Minerals
To produce Al-matrix cast particle composites, wettability of the ceramic particles by liquid Al is essential. To improve wettability of the solution, few elements such as Mg and Si are added into Al melt to incorporate the ceramic particles. The present investigation has been focussed on the utilization of abundant available industrial waste such as fly ash and bagasse ash in useful manner by dispersing it into Eutectic Al-Si alloy LM6 Containing 10.58% Si to produce composites by liquid casting route. The mechanical properties such as Brinell Hardness and Ultimate tensile strength has been investigated. The test results of the …
