Foaming and Interfacial Properties of Oligomeric Surfactant Solutions
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Non-linear analysis of shells of revolution using mathematical optimisation
In the paper presented, reinforced concrete shells of revolution are analyzed in both meridional and circumferential directions. Taking into account the physical non-linearity of the material, the internal forces and the deflections of the shell as well as the strain distribution at the cross-sections are calculated.…
The Optimization of Novel Leucite Glass-ceramics
Objectives: The aims of the study were to optimize the crystallization and heat extrusion of novel leucite glass-ceramics. Methods: Glass was designed, synthesized and attritor milled into powders. The glass powder A was characterised using Differential Scanning Calorimetry and High Temperature X-ray Diffraction (HTXR…
PHYSICAL AND CHEMICAL CHARACTERIZATION OF SOIL AS THEY RELATE TO GEOPHYSICAL LOGGING OF EASTERN LONG ISLAND AQUIFERS
As part of the Peconic Estuary Program (PEP), the aim of this project was to develop a comprehensive study of the hydrogeologic situation of eastern Long Island. A preliminary investigation involved geophysical logging, or lowering various nuclear and electric apparatuses into a strategic, near-shore monitoring well (…
Variation in Morphology, Hygroscopicity, and Optical Properties of Soot Particles Coated by Dicarboxylic Acids
Soot aerosols are well known to be atmospheric constituents, but the hydrophobic nature of fresh soot likely prohibits them from encouraging cloud development. Soot aged through contact with oxygenated organic compounds may become hydrophilic enough to promote water uptake. In this study, the tandem differential mobil…
Atomare und elektronische Struktur von Akzeptorkomplexen und Oberflächen des Zinkoxids
ZnO zeigt eine starke inhärente n-Typ-Leitung. Die Herstellung von p-dotierten ZnO-Kristallen oder Schichten ist daher schwierig. Trotz einiger experimenteller Erfolge [Look et al., physica status solidi (a) 201, (2004) 2203] bleibt die Reproduzierbarkeit und Langzeitstabilität eine große Herausforderung. Ein vielvers…
[-101]方向极化的0.23Pb(In1/2Nb1/2O3)-0.45Pb(Mg1/3Nb2/3)O3–0.32PbTiO3晶体全套弹性、介电、压电参数
In order to better utilize the superior transverse and shear piezoelectric properties of 0.23Pb(In1/2Nb1/2O3)–0.45Pb(Mg1/3Nb2/3)O3–0.32PbTiO3 single crystals near the morphotropic phase boundary, a complete set of elastic, dielectric, and piezoelectric coefficients of [1 0 1] poled single crystal were determined by re…
Development of an atomistic/continous simulation tool for nanoelectronic devices
La simulazione dei moderni dispositivi elettronici è una grande sfida per la comunità ingegneristica. L'enorme progresso nei processi di fabbricazione ha permesso una riduzione della dimensione dei dispositivi talmente spinta che fenomeni tipici della scala di lunghezza nanometrica giocano un ruolo cruciale. Inoltre…
Nonlinear Analysis of Beams Using Least-Squares Finite Element Models Based on the Euler-Bernoulli and Timoshenko Beam Theories
The conventional finite element models (FEM) of problems in structural\nmechanics are based on the principles of virtual work and the total potential\nenergy. In these models, the secondary variables, such as the bending moment\nand shear force, are post-computed and do not yield good accuracy. In addition,\nin the ca…
Rigidity Analysis for Modeling Protein Motion
Protein structure and motion plays an essential role in nearly all forms of\nlife. Understanding both protein folding and protein conformational change can\nbring deeper insight to many biochemical processes and even into some devastating\ndiseases thought to be the result of protein misfolding. Experimental methods a…
Antimicrobial Activity of Cationic Antiseptics in Layer-by-Layer Thin Film Assemblies
Layer-by-layer (LbL) assembly has proven to be a powerful technique for\nassembling thin films with a variety of properties including electrochromic, molecular\nsensing, oxygen barrier, and antimicrobial. LbL involves the deposition of alternating\ncationic and anionic ingredients from solution, utilizing the electros…
Surface Characterization of Heterogeneous Catalysts Using Low Energy Ion Scattering Spectroscopy Combined with Electrochemistry
Fundamental studies of heterogeneous catalysis were performed and presented in this dissertation to gain a better understanding of heterogeneous catalytic reactions at a molecular level. Surface science techniques were employed in achieving the goal. Low energy ion scattering spectroscopy (LEISS) is the main surface s…
DEVELOPMENT AND MECHANISTIC STUDIES OF THE CHROMIUM TETRAMETHYLTETRAAZAANNULENE CATALYST SYSTEM FOR THE COPOLYMERIZATION OF CARBON DIOXIDE AND EPOXIDES
A prominent goal of scientists is to develop products and processes to meet the\never-growing needs of society. Today's needs include products that are economical,\nspecialized, and made through processes with minimal impact on the environment. One\nsuch product that serves an important and widespread need is poly(bis…
Assessment of Oxidation in Carbon Foam
Carbon foams exhibit numerous unique properties which are attractive for light\nweight applications such as aircraft and spacecraft as a tailorable material. Carbon foams,\nwhen exposed to air, oxidize at temperatures as low as 500-600 degrees Celsius. The research\nobjectives of this study are to assess the degree of…
Computational and Experimental Evaluation of Actuating Shape Memory Polymer Foams in the Context of Aneurysm Treatment
Shape memory polymer foams may be used to treat vascular aneurysms through thermal actuation of the foam from a compacted to an expanded configuration within the aneurysm structure, thereby alleviating blood pressure on the weakened aneurysm walls and reducing potential for rupture. After delivery to the aneurysm site…
Transformation of Acetone and Isopropanol to Hydrocarbons using HZSM-5 Catalyst
This research describes the production of hydrocarbons from acetone and isopropanol produced by the MixAlco process. The MixAlco process has two types of products: acetone and isopropanol. The effect of the temperature, weight hourly space velocity (WHSV), type of catalyst, feed composition, and pressure are studied.…
A Theoretical Approach for the Determination and Mechanistic Interpretation of Radiation D10-value
In the design of the food irradiation process, the knowledge of the radiation resistance of\nthe target organism in a specific food commodity is required. The D10-value, the radiation dose\nneeded to inactivate 90% of the microbial load in the food medium, is used to relate the amount\nof absorbed energy to the surviv…
SENSING AND SEPARATING BIOMOLECULES AT BIOINTERFACES
Ligand-receptor interactions are ubiquitous on cell membranes. Indeed, many\nimportant physiological functions primarily involve such interactions. These include cell\nsignaling, pathogen binding, trafficking of lymphocytes, and the immune response.1-4\nTherefore, studying ligand-receptor interactions at appropriate m…
Amperometric Glucose Biosensor by Means of Electrostatic Layer-by-layer Adsorption onto Electrospun Polyaniline Fibers
An amperometric glucose biosensor was fabricated using electospun polyaniline\nfibers. Polyaniline was reacted with camphorsulfonic acid to produce a salt, which was\nthen dissolved in chloroform containing polystyrene. Using this solution, fibers were\nformed and collected by electrospinning. Glucose oxidase was immo…
Capacitive Stress Transducers in Model Dipole Magnets
Capacitive stress transducers are used to measure mechanical stresses in the windings of superconducting dipole magnets. These transducers consist of a bonded laminate composed of alternating foils of stainless steel and a high-strength polymer known as polyimide. The thin, flat design of the transducers is ideal for…