Engineering Science and Materials Commons^™

Monitoring In-Service Performance Of Fibre-Reinforced Foamed Urethane Sleepers/Bearers In Railway Urban Turnout Systems, Sakdirat Kaewunruen

Sakdirat Kaewunruen

Special track systems used to divert a train to other directions or other tracks are generally called \'railway turnout\'. A traditional turnout system consists of steel rails, switches, crossings, steel plates, fasteners, screw spikes, timber bearers, ballast and formation. The wheel rail contact over the crossing transfer zone has a dip-like shape and can often cause detrimental impact loads on the railway track and its components. The large impact also emits disturbing noises (either impact or ground-borne noise) to railway neighbors. In a brown-field railway track where an existing aged infrastructure requires renewal or maintenance, some physical constraints and construction ...

Waste Heat Reclamation For Commercial Use, Andrew Webber

Liberal Arts and Engineering Studies

The purpose of this project was to capture waste heat to raise the temperature of groundwater for commercial applications.

Citations Of Articles Authored By Wojciech M. Budzianowski, Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.

Understanding The Magnetostructural Transformation In Ferh Thin Films, Melissa Loving

Chemical Engineering Dissertations

Magnetostructural materials demonstrate concurrent magnetic and structural phase transformations which may be driven by changes in temperature, pressure (strain), or magnetic field. The ability to alter the phase transformation via a variety of routes makes these systems the interest of fundamental studies of the physics underlying the transformation, as well as potential technological applications. Equiatomic FeRh, a model magnetostructural material with the chemically-ordered CsCl-type crystal structure, undergoes a first-order phase transition (FOPT) (upon heating) from antiferromagnetic (AF) to ferromagnetic (FM) order with an accompanying 1% (volume) lattice expansion at T~370 K, in bulk. Thin film forms of FeRh provide ...

Self-Biased Circulators For High Power Applications, Alexander S. Sokolov

Electrical and Computer Engineering Master's Theses

Self-biased circulators exploit the properties of high anisotropy magnetic field in hexagonal ferrites, thus allowing operation without biasing magnets and a significant size and weight reduction. Although first self-biased circulators were demonstrated more than 20 years ago, all the prototypes constructed so far are unsuitable for practical applications.

An attempt to design a self-biased circulator from scratch was made. Novel exceptionally low dielectric loss and high heat conductivity ceramic materials were developed and innovative substrate synthesis techniques were employed. Low temperature cofiring of green body ferrite compacts and dielectric ceramic slurries were mastered, resulting in solid composite substrates.

Original device ...

Mechanika Płynów Lab., Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.

Tematyka Prac Doktorskich, Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.

Tematyka Prac Dyplomowych Dla Studentów Wydziału Chemicznego Pwr., Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.

Tematyka Prac Dyplomowych Dla Studentów Wydziału Mechaniczno-Energetycznego Pwr., Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.

H-Index Rankings Of Polish Scientists, Wojciech M. Budzianowski

Wojciech Budzianowski

This contribution provides subject area-specific h-index rankings of Polish scientists. The rankings use Scopus scientific publications database as a publication and citation resource. 23 subject areas from Scopus are covered. The methodology of the rankings is detailed.

Plasmonic Sensors In Multi-Analyte Environment: Rate Constants And Transient Analysis, Zeljko D. Cupic

Zeljko D Cupic

This paper investigates multicomponent gas adsorption at the active surface of plasmonic chemical sensors and shows that there are situations where transients in a single sensor element can be used for simultaneous detection of different gases in multicomponent mixtures. A general master equation set is provided, describing multicomponent adsorption. Analytical expressions for sorption rates are derived and high-accuracy simplified models are proposed. Expressions for adsorption rate constants and rates and for number of binding sites are proposed. The derived analytical model takes into account the adsorbate molecule size, distribution of binding sites as determined by the crystallographic structure of the ...

Morphological Instability Leading To Formation Of Porous Anodic Oxides, Ömer Özgür Çapraz, Kurt R. Hebert Dr., Pranav Shrotriya Dr.

Ömer Özgür Çapraz

No abstract provided.

Evidence Of The Existence Of Cathodic And Anodic Zones During The Leaching Of Minerals And Metals, Fathi Habashi

Fathi Habashi

It is accepted worldwide that the dissolution of minerals in some cases, is an electrochemical process where anodic and cathodic reactions take place. There are many parameters, such as agent concentration, that directly affect the dissolution process. The rate of leaching of minerals may differ depending on the oxygen concentration. In this paper, the existence of anodic and cathodic zones on themineral surface during the dissolution/leaching of minerals andmetals has been presentedwith some differentworks. It isworthmentioning that a good number of published papers have experimentally demonstrated the existence of anodic and cathodic areas on the mineral surface.

C.V., Wojciech M. Budzianowski

Wojciech Budzianowski

No abstract provided.

Mode I Fracture Toughness Of Eight-Harness-Satin Carbon Cloth Weaves For Co-Cured And Post-Bonded Laminates, Josh E. Smith

Master's Theses and Project Reports

Mode I interlaminar fracture of 3k 8-Harness-Satin Carbon cloth, with identical fill and weft yarns, pre-impregnated with Newport 307 resin was investigated through the DCB test (ASTM D5528). Crack propagations along both the fill and weft yarns were considered for both post-bonded (co-bonded) and co-cured laminates. A patent-pending delamination insertion method was compared to the standard Teflon film option to assess its applicability to mode I fracture testing. The Modified Beam Theory, Compliance Calibration method, and Modified Compliance Calibration method were used for comparative purposes for these investigations and to evaluate the validity of the proposed Equivalent Stiffness (EQS) method ...

Structure And Energetics Of Nanoparticles And Ionomer Films In Fuel Cell Catalyst Layers, Qianping He

Doctoral Dissertations

Improving the durability and utilization efficiency of the platinum-on-carbon (Pt/C) catalyst is of vital importance to the commercialization of the polymer electrolyte membrane fuel cell (PEMFC). This body of work provides molecular level insights to aid the fulfillment of this goal. Chapter 1 describes the use of molecular dynamics (MD) simulation in an effort to understand the Pt/C degradation issue from the nano-adhesion point of view. The roles of catalyst nanoparticle size, shape, Pt/C surface oxidation and the extent of ionomer film hydration are investigated to study their effects on nano-particle adhesion. It is found that the ...

An Automated Finite Element Analysis Framework For The Probabilistic Evaluation Of Composite Lamina Properties, Jonathan Phillips Weigand

Masters Theses

This thesis outlines the development of computational modeling tools used to predict the elastic properties of composite lamina from representative volume elements (RVE) using numerical methods. The homogenization approach involves the use of Gauss’s Theorem to simply the average volumetric strain integral into a surface integral containing which is defined by surface displacements and their direction. Simulations of RVEs under specific loading conditions (longitudinal tension or shear and transverse tension or shear) are then performed in the software package ABAQUS to obtain the surface displacements. It was found that obtaining quality meshes and applying periodic boundary conditions for each ...

Feasibility Of The Use Of Ultrasound Measurements For Grade Verification Of The Performance Grade Asphalt Binders, Mehdi Khalili

UNLV Theses/Dissertations/Professional Papers/Capstones

This research investigates the feasibility of application of high frequency immersion ultrasonic measurement (UM) to discriminate different performance grade (PG) asphalt binders. PG asphalt binder is one of the main components of hot mix asphalt used for roadway construction. UT may provide an inexpensive alternative to sophisticated tests currently used for quality control of PG asphalt binders. Nine different PG asphalt binders used were selected for this investigation. Velocity (V) and integrated response (IR) of the ultrasonic wave were measured. The IR is a measure of the ratio of ultrasonic energy transmitted into the material to the ultrasonic energy reflected ...

Assessment Of The Effectiveness Of An Aid For The Development Of The Kinetic Skills Required For T.I.G. Welding, Maurice Collins, Robert Morris

Conference papers

This action research project was carried out in the Dublin Institute of Technology, Ireland. The authors are both Lecturers of Engineering in this college and have a keen interest in providing the best possible aids to their students learning. Three groups of engineering apprentices and one group of part time students took part in this project. At the time these students were taking a third level Tungsten Inert Gas welding (T.I.G.) training module. Qualified T.I.G. welders are in very high demand worldwide and as such can demand a very high rate of pay for their services ...

Designing Meaningful Molecular Dynamics (Md) Simulations: The Lithiation Of Silicon, María Camila Rincon, Alejandro Strachan, Hojin Kim, David Guzman, Mathew Cherukara

The Summer Undergraduate Research Fellowship (SURF) Symposium

Molecular dynamics (MD) is used to understand the properties of materials by following the time evolution of the system and exploring the interactions between its constituent atoms. MD simulation allows making reliable predictions of various properties of materials; however, designing useful computer experiments is a complex task that requires the appropriate selection of interatomic interactions (force fields) and other conditions. In this work we discuss some aspects of molecular dynamics that would help the inexperienced users design reliable simulations. The simulation of the lithiation process of silicon is taken as an example for better understanding.