Mapping Of Bruise Of Oil Palm Fresh Fruit Bunch During Loading And Transportation From Field To Mill,
2018
Faculty of Agricultural Technology, Institut Pertanian Stiper, Yogyakarta 55281, Indonesia
Mapping Of Bruise Of Oil Palm Fresh Fruit Bunch During Loading And Transportation From Field To Mill, Andreas Wahyu Krisdiarto
Makara Journal of Technology
Fresh fruit bunches (FFBs) are used as raw materials for palm oil, and their transport from a field is a critical step to maintain their quality. Fruit integrity should be maintained so the mill can efficiently obtain palm oil with less than 5% free fatty acid content. Physical treatments for FFBs during loading to truck bins and transport may cause physical injuries. This research aimed to map fruit bruises. The map can be used as a basis in managing transport of FFBs. Physical injuries were assessed by bruise index (BI), which was calculated by measuring the bruise area and weight …
Investigation Of Ship Hull Girder Strength With Grounding Damage,
2018
Department of Ocean Engineering, Engineering Faculty, Universitas Hasanuddin, Gowa 92172, Indonesia
Investigation Of Ship Hull Girder Strength With Grounding Damage, Muhammad Zubair Muis Alie, Ristiyanto Adiputra
Makara Journal of Technology
The objective of the present study is to investigate ship hull girder strength as a result of grounding damage upon longitudinal bending. A bulk carrier and tanker are analyzed and Smith’s Method is adopted and implemented in the analysis program. An efficient solution procedure is performed by assuming the cross-section remains plane and the vertical bending moment is applied to the cross section. As a fundamental case, the damage is simply created by removing the elements from the cross section. Welding residual stress, initial imperfections, and crack extensions are not considered. The grounding damage is made by two conditions, namely …
Benchmarking Product Service System Of Generator Set Distributors,
2018
Industrial Engineering, Swiss German University, The Prominence Tower, Alam Sutera, Tangerang 15143, Indonesia
Benchmarking Product Service System Of Generator Set Distributors, Venny Violetta Tiurindah, Tanika Dewi Sofianti
Makara Journal of Technology
Power generation is an industry that is essential to sustain daily life and competes with generator set distributors. The product service system of distributors must be improved to survive the competition. This research aims to develop tools for benchmarking the product service system of generator set distributors. Benchmarking identifies gaps between a product and other competitors’ products. In this work, a product service system board is used to visualize the current product service system of a generator set distributor. A PPIAF framework and a SERVQUAL framework are adapted to assess product performance and service quality, respectively. AHP is used as …
Nanoengineering Of Next Generation Silicone Rubber Materials For Extreme Applications,
2018
University of Denver
Nanoengineering Of Next Generation Silicone Rubber Materials For Extreme Applications, Monika Bleszynski
Electronic Theses and Dissertations
Silicone rubber materials are frequently used in extreme environments, including aviation, space, high voltage and other applications. In service, however, complex and difficult to predict damage mechanisms in the rubbers can occur which can lead to severe failures of essential infrastructural components. For example, Non-Ceramic Insulators (NCIs), which support some of the most critical high voltage lines in the world, regularly exhibit severe polymer aging due to environmental pollution, ultra-violet (UV) radiation, and dry band and corona arcing. Designing silicone rubbers to resist aging in these demanding environments is difficult and requires an interdisciplinary approach, including correctly assessing the actual …
Fused Particle Fabrication 3-D Printing: Recycled Materials’ Optimization And Mechanical Properties,
2018
Michigan Technological University
Fused Particle Fabrication 3-D Printing: Recycled Materials’ Optimization And Mechanical Properties, Aubrey Woern, Dennis Byard, Robert B. Oakley, Matthew J. Fiedler, Samantha Snabes, Joshua M. Pearce
Department of Materials Science and Engineering Publications
Fused particle fabrication (FPF) (or fused granular fabrication (FGF)) has potential for increasing recycled polymers in 3-D printing. Here, the open source Gigabot X is used to develop a new method to optimize FPF/FGF for recycled materials. Virgin polylactic acid (PLA) pellets and prints were analyzed and were then compared to four recycled polymers including the two most popular printing materials (PLA and acrylonitrile butadiene styrene (ABS)) as well as the two most common waste plastics (polyethylene terephthalate (PET) and polypropylene (PP)). The size characteristics of the various materials were quantified using digital image processing. Then, power and nozzle velocity …
Computational Study On The Cu-Rich Side Of Aluminum-Copper Phase Diagram,
2018
University of Texas at Arlington
Computational Study On The Cu-Rich Side Of Aluminum-Copper Phase Diagram, Khaled Ahmed Hirmas
Material Science and Engineering Dissertations - Archive
Cu-rich side of Al-Cu phase diagram has not been studied extensively as the Al-rich side. It is well established that a one-phase (a phase) exists at 300oC between the 82% Cu and pure Cu, and at the eutectic temperature (1032oC) between 86% Cu and pure Cu, a phase, when quenched from above 600oC and subjected to annealing below about 300oC, or deformation, show ordering effects in resistivity, heat capacity, diffuse X-ray, microstructure, and in mechanical properties. This has been studied to determine whether these effects are due to short-range or long-range ordered domain [1]. The present computational study is to …
Achieving Novel Functionalities In Semiconductor-Crystalline Oxide Heterostructures Through Electrical And Structural Coupling,
2018
University of Texas at Arlington
Achieving Novel Functionalities In Semiconductor-Crystalline Oxide Heterostructures Through Electrical And Structural Coupling, Kamyar Ahmadi-Majlan
Material Science and Engineering Dissertations - Archive
Creating new materials that exhibit enhanced or novel behaviors is essential to meet the technological challenges we face today. Complex oxides are perfect candidates to overcome these challenges due to the range of electronic, optical, and ionic properties they exhibit. The research presented here, mainly focuses on overcoming two important challenges in oxide electronics. First,the ability of epitaxially growing multifunctional oxides on conventional semiconductor substrates and second, the successful integration of multifunctional oxide properties on semiconductors Oxide molecular beam epitaxy was utilized to grow transition metal oxides with unprecedented control, layer-by-layer, at the atomic scale. Such control of growth enables …
An Investigation Of The Plasma Electrolytic Oxidation Mechanism For Coating Of Alumina-Zirconia Nanocomposite,
2018
University of Texas at Arlington
An Investigation Of The Plasma Electrolytic Oxidation Mechanism For Coating Of Alumina-Zirconia Nanocomposite, Nastaran Barati
Material Science and Engineering Dissertations - Archive
Plasma Electrolytic Oxidation (PEO) is an electrochemical surface modification technique which is able to coat ceramic coatings on valve metals from either cationic or anionic species in an aqueous electrolyte. Applying high voltage in the range of 300-600 V is required to achieve crystalline phases. PEO is a clean technology which offers several benefits including high deposition rates, excellent adhesion strength and mechanical properties. One of the interesting capabilities of the PEO process is its ability to form composite coatings. The following work aims to study the growth mechanism of nanocomposite layers coated by PEO. Two experimental routs have been …
Spectral-Domain Phase-Sensitive Interferometry For Real-Time Probing Of Electrodeposition Processes,
2018
University of Texas at Arlington
Spectral-Domain Phase-Sensitive Interferometry For Real-Time Probing Of Electrodeposition Processes, Yujen Chiu
Material Science and Engineering Dissertations - Archive
Electrodeposition is a simple, versatile and scalable method for depositing thin metal films on conductive substrates, and it has long been used in large-scale industrial processes for metal film coating. In the last two decades, electrodeposition has entered into the manufacturing processes of electronic devices. Electrodeposition of Cu has become the standard process for the backend processes for almost all microelectronic devices. Electrodeposition of Cu and magnetic materials are used in the fabrication of write/read head in computer hard disk drive. More recently, a unique electrodeposition process, under potential deposition (UPD), has been utilized for atomic layer deposition to generate …
Investigation Of Surface Contamination In A Cu-Based Al Alloy Occurring During Tem Sample Preparation,
2018
University of Texas at Arlington
Investigation Of Surface Contamination In A Cu-Based Al Alloy Occurring During Tem Sample Preparation, Kelly Claunch
Material Science and Engineering Theses - Archive
This thesis investigates the nature of surface contamination originating from the jet-polishing process on Cu-6 wt% Al TEM disks. During previous TEM imaging and diffraction analysis performed by our group, surface contamination particles, roughly 15-60 nm in diameter, were observed on the surface of the jet-polished TEM disks. Further, TEM diffraction analysis revealed that the contamination particles were growing epitaxially on the Cu matrix. HR-SEM was used to characterize the surface contamination in terms of shape, size, composition, and distribution on the surface of the disks. Through extensive HR-SEM imaging, it was found that surface contamination particles are present on …
New Methods For Understanding And Controlling The Self-Assembly Of Reacting Systems Using Coarse-Grained Molecular Dynamics,
2018
Boise State University
New Methods For Understanding And Controlling The Self-Assembly Of Reacting Systems Using Coarse-Grained Molecular Dynamics, Stephen Thomas
Boise State University Theses and Dissertations
This research aims at developing new computational methods to understand the molecular self-assembly of reacting systems whose complex structures depend on the thermodynamics of mixing, reaction kinetics, and diffusion kinetics. The specific reacting system examined in this study is epoxy, cured with linear chain thermoplastic tougheners whose complex microstructure is known from experiments to affect mechanical properties and to be sensitive to processing conditions. Mesoscale simulation techniques have helped to bridge the length and time scales needed to predict the microstructures of cured epoxies, but the prohibitive computational cost of simulating experimentally relevant system sizes has limited their impact. In …
Incorporation Of Silica Nanoparticles Into The Underlayer Of Pda/Ptfe Thin Coatings,
2018
University of Arkansas, Fayetteville
Incorporation Of Silica Nanoparticles Into The Underlayer Of Pda/Ptfe Thin Coatings, Adedoyin Abe
Mechanical Engineering Undergraduate Honors Theses
Polytetrafluoroethylene (PTFE) is one of the most low friction and corrosion resistant solid lubricants. Prior studies have shown that a polydopamine (PDA) underlayer enhances the durability of PTFE thin coating. In this study, 100, 200, and 300 µL of aqueous silica nanoparticle (NP) solutions were added to the PDA deposition solution. The durability and coefficient of friction of PDA/PTFE thin coatings on stainless steel substrates are investigated with and without incorporating the silica NPs. The coatings were tested in dry contact conditions using a Universal Mechanical Tester (UMT) with a ball-on-flat configuration in a reciprocating motion. It was found that …
The Effects Of Atmospheric Heat Treatments On Tio2 Nanotube Anodes For Lithium-Ion Batteries,
2018
Boise State University
The Effects Of Atmospheric Heat Treatments On Tio2 Nanotube Anodes For Lithium-Ion Batteries, Andreas Savva
Boise State University Theses and Dissertations
The effects of various heat treatments on the physical and electrochemical properties of anatase TiO2 nanotubes were studied in this work. Well-ordered TiO2 nanotubes were grown via electrochemical anodization and annealed at 450°C to induce a phase transformation to anatase. The heat treatments were conducted under atmospheres of O2, Ar, N2, and water vapor (WV) to create different point defects. The oxygen-deficient atmospheres were used to generate oxygen vacancies in the TiO2 nanotubes, while the water vapor treatment was used to create Ti vacancies by stabilizing them via the protonation of O sites. …
Irradiation Effects On Titanium Dioxide Electrodes For Lithium Ion Batteries,
2018
Boise State University
Irradiation Effects On Titanium Dioxide Electrodes For Lithium Ion Batteries, Kassiopeia Ann Smith
Boise State University Theses and Dissertations
This dissertation presents the mechanisms of irradiation induced defects and the resulting electrochemical response of TiO2 anode for lithium-ion-batteries. The objective is to realize pathways by which irradiation could be used to enhance the energy density of rechargeable lithium ion batteries in order to provide power to applications under extreme environments. Recent studies suggest that the presence of structural defects (e.g. vacancies and interstitials) in metal oxides may enhance the electrochemical charge storage capacity in electrode materials. One approach to induce defect formation in electrode materials is to use ion irradiation, which has been proven to produce point …
Improving And Augmenting The Anm Model For Three-Dimensional Virtual Concrete,
2018
Boise State University
Improving And Augmenting The Anm Model For Three-Dimensional Virtual Concrete, Stephen Thomas
Boise State University Theses and Dissertations
The Anm model used for creating virtual concrete consisting of irregular shapes has been improved by integrating two existing algorithms: the extent overlap box (EOB) method for detecting contact between two irregular shapes and the uniform thickness shell algorithm. The EOB method has been compared with the previously used Newton-Raphson method and shown to be able to detect inter-particle contact with better accuracy and with less computational cost. Two parameters that define the balance between accuracy and performance of the EOB method have been identified and studied. The uniform thickness shell has been used to specify the minimum inter-particle distance …
Application Of Nano-Plasmonics For Sers Bio-Detection And Photocatalysis In The Same Platform,
2018
Missouri State University
Application Of Nano-Plasmonics For Sers Bio-Detection And Photocatalysis In The Same Platform, Muhammad R. Shattique
Graduate Theses/Dissertations
Nano-biological systems interfacing nano-structured solid surfaces with biological compounds such as oligonucleotides or proteins are highly regarded as enabling materials for biosensing and biocatalysis applications. In particular, nanostructures of noble metals such as gold or silver, when exposed to light, exhibit a phenomenon known as surface plasmon resonance. When a proper metal nanostructure (plasmonic substrate) is exposed to light, very efficient absorption of incoming photons is possible, resulting in a buildup of localized high-energy regions, or “hot-spots”, where energetic carriers or “hot carriers” can be created. These hot-carriers can be used to catalyze desired chemical transformations in materials located nearby. …
Investigations On Hydrothermally Synthesized Co3o4/Mnxco3-Xo4 Core-Shell Nanoparticles,
2018
Missouri State University
Investigations On Hydrothermally Synthesized Co3o4/Mnxco3-Xo4 Core-Shell Nanoparticles, Ning Bian
Graduate Theses/Dissertations
Two different morphologies (pseudo-spherical shaped or PS type and hexagonal nanoplate shaped or NP type) and two different concentrations (0.07 M and 0.1 M) of manganese incorporated Co3O4@MnxCo3-xO4 core-shell nanoparticles (CSNs) were investigated, respectively. The motivation of this work is to investigate the magnetic properties of, and specifically the exchange bias, between different shaped CSNs and between different Mn-doped CSNs. A two-step synthesis method was utilized to obtain the CSNs: a soft chemical approach was used to obtain Co3O4 nanoparticles and a hydrothermal nano-phase epitaxy was used to …
High Dynamic Range Optical Devices And Applications.,
2018
University of Louisville
High Dynamic Range Optical Devices And Applications., Elijah Robert Jensen
Electronic Theses and Dissertations
Much of what we know about fundamental physical law and the universe derives from observations and measurements using optical methods. The passive use of the electromagnetic spectrum can be the best way of studying physical phenomenon in general with minimal disturbance of the system in the process. While for many applications ambient visible light is sufficient, light outside of the visible range may convey more information. The signals of interest are also often a small fraction of the background, and their changes occur on time scales so quickly that they are visually imperceptible. This thesis reports techniques and technologies developed …
Design Survey Of Laminated Composite I-Beam,
2018
Utah State University
Design Survey Of Laminated Composite I-Beam, Mrinmoy Saha
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
Composite I-beams are popular for high-strength low-weight applications. Learning the macro-mechanics and designing the composite I-beam properly are necessary. In this report, a design overview of the composite I-beam is discussed which is based on classical lamination theory where it includes the homogenization approach, the plane stress assumption and the Kirchhoff hypothesis. Using these assumptions, a method was developed to come up with the effective material properties of a beam. Formulas to calculate maximum deflection and maximum bending stress and shear stress and the stress concentration at the connection of web-flange are discussed which describe ways for designing and manufacturing …
Microstructure And Mechanical Properties Of Selective Laser Melted Superalloy Inconel 625.,
2018
University of Louisville
Microstructure And Mechanical Properties Of Selective Laser Melted Superalloy Inconel 625., Md Ashabul Anam
Electronic Theses and Dissertations
Selective Laser Melting (SLM), a powder based Additive Manufacturing (AM) process, has gained considerable attention in the aerospace, biomedical and automotive industries due to its many potential benefits, such as, capability of fabricating complex three-dimensional components, shortened design to product time, reduction in process steps, component mass reduction and material flexibility. This process uses metallic powder and is capable of fabricating complex structures with excellent microstructure which make SLM not only an improvement over other manufacturing processes but also innovative material processing technology. Inconel 625, a nickel-based super alloy is widely popular in aerospace, chemical and nuclear industries. This alloy …
