Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 40 for “"Metallic surfaces"”.
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Fingermark Enhancement on Metallic Surfaces
The recovery of latent fingermarks from surfaces is critical in the investigation of a crime scene. It could provide the identity of a victim of the crime or a person of interest to the investigation. The surfaces being examined may comprise of a single or mixture of materials, each requiring a …
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Optical studies of the nature of metallic surfaces
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1936
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Sessile droplets of salt solutions on inert and metallic surfaces
… of aqueous saline solutions on planar inert and metallic surfaces and characterise the corrosion phenomenon for iron surfaces. First we study the evaporation behaviour of sessile salty droplets on inert surfaces for a wide range of salt concentrations, relative humidities, droplet sizes and …
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I. The Adsorption and Reaction Mechanism of Bis Beta Chloroethyl Vinyl Phosphonate on Metallic Surfaces. Ii. A Critical Study of the Composition, Colloidal Properties and Stability of Complex Protein - Carbohydrate - Tannin - Melanoidin Hazes
Made available in DSpace on 2014-12-05T19:36:37Z (GMT). No. of bitstreams: 1 0023310.pdf: 5253409 bytes, checksum: 94fa03713630cae189f915cdfdf79fc1 (MD5) Previous issue date: 1957
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Exoelectrogenic biofilm growth in shearing flows
… distribution. Microorganisms interacting with surfaces under these open channel flows contend with high shear rates and active transport to the surface. The metallic surfaces they interact with carry charge at various potentials that are little addressed in literature. We demonstrate for the …
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Reduced-Cost CEM Problems Through Model Simplification and a-Priori Information
… radiation and scattering by dielectric-coated, metallic surfaces. For these problems, solution efficiency is improved by using boundary conditions to reduce a volumetric formulation to a surface formulation. Finally, we provide alternative methods to locate the position of a buried receiver …
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RFID technology
… it is difficult for UHF RFIDtags to be placed on metallic surfaces. Since metallic surfaces affect the tag antenna parameters such as the impedance matching, the radiation efficiency and the radiation pattern. This led researches to carry out some studies to find out solution for this problem.This …
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Designing plasmonic structures
… study of light near micro- or nano-fabricated metallic surfaces, play a major role in all structures in this thesis. An effective work-flow in designing "plasmonic" structures is detailed. Various applications are then discussed: (1) Enhanced transmission through subwavelength apertures in …
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Environmental Performance of Coal Slag and Garnet as Abrasives
… many other industries in surface preparation of metallic surfaces. Environmental performance evaluated in this study included, (1) productivity (ft2/hr), (2) consumption and or used-abrasive generation rate (ton/2000 ft2; lb/ ft2), (3) particulate emission factors (mg/ft2; mg/lb; lb/lb; lb/kg; …
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The erosion of metals
The study of the erosion of metallic surfaces by solid particles has been an area of dispute recently (1980) especially concerning the importance of target melting as a mechanism for the removal of material. In addition, erosion by particles at a normal angle of impingement has remained unexplained …
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Pressure Tuning Spectroscopy of Metal Cluster Compounds and Organometallics
… upon various metal cluster compounds and organometallics was studied through the use of electronic absorption and infrared spectroscopies. The systems studied were chosen for their use as potential models for chemisorbed metallic surfaces, and to gain a better fundamental understanding of …
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Latent Fingerprint Enhancement on a Brass Metal Surface using Paint Electrodeposition
… methods of enhancing fingerprints from metallic surfaces. Despite the success of cyanoacrylate fuming, fingerprint recovery on fired cartridge casings is rarely successful. Therefore, a new fingerprint development method is needed to enhance fingerprint evidence that may still be present …
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Role of fluctuations and defects in select condensed matter problems
… when single molecules are placed near non-planar metallic surfaces. We compute the exact first order self-fields of vertical dipoles located above locally curved perfectly conducting surfaces by invoking a small slope phase perturbation technique. The results suggest that smooth perturbations lead …
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Self-Assembled Monolayers of N-Heterocyclic Carbenes on Gold and Silver: Applications in Biosensing
Modification of metallic surfaces using thiol-based self-assembled monolayers (SAMs) has been explored in the literature in the past three decades; silver surfaces less explored than gold. This technology has promise in many surface-based applications, specifically in micro electronics, sensors …
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Nanopartículas magnéticas adsorvidas em superfícies metálicas
… properties of magnetic systems adsorbed in metallic surfaces is quite important for technological and scientific reasons. Here, this kind of system is studied theoretically by first principles calculations, based on the density functional theory (DFT), as well as by tight binding models. We …
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Advanced Faraday cage measurements of charge, short-circuit current and open-circuit voltage
… performed to show that for water to condense on metallic surfaces, it is not necessary to reach the dew point. The calculated dew point temperature is lower than the temperature at which the water condenses upon the electrode surfaces. In the liquid and solid dielectric experiments, we use a …
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Light and Single-molecule Coupling in Plasmonic Nanogaps
… confined in nanometre gaps formed between two metallic surfaces which creates an optical resonance. This optical resonance of the system is controlled by the geometry and the material of the nanogap. The focus of this work is to understand and utilize these confined optical modes to probe and …
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Processes for Forming Plasmonic Waveguides from Self-Assembled Gold Nanoparticle Thin Films
… lithography to create these perturbations on metallic surfaces called plasmonic waveguides. While these waveguides are fairly efficient, in the amounts required to make real circuits this method would be impractically slow and prohibitively expensive. However, such waveguides could be made …
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Modelling Thermal Conductivity of Porous Thermal Barrier Coatings for High-Temperature Aero Engines
… engines, helping to prevent the melting of metallic surfaces. TBC is a sophisticated layered system that can be divided into top coat, bond coat, and the super-alloy substrate. The highly heterogeneous microstructure of the TBC consists of defects such as pores, voids, and cracks of …
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