Engineering Commons^™

The Direct Patterning Of Nanoporous Interlayer Dielectric Insulator Films By Nanoimprint Lithography, Alamgir Karim

Alamgir Karim

No abstract provided.

Does Faculty Research Improve Undergraduate Teaching: An Analysis Of Existing And Potential Synergies, Michael Prince, R. Felder, R. Brent

Michael J. Prince

No abstract provided.

Studies Of A Lattice Model Of Water Confined In A Slit Pore, Peter A. Monson, J. -C. Liu, Frank Van Swol

Peter A. Monson

We describe an extension of the Bell−Salt lattice model of water to the study of water confined in a slit pore. Wall−fluid interactions are chosen to be qualitatively representative of water interacting with a graphite surface. We have calculated the bulk vapor−liquid phase coexistence for the model through direct Monte Carlo simulations of the vapor−liquid interface. Adsorption and desorption isotherms in the slit pore were calculated using grand canonical ensemble Monte Carlo simulations. In addition, the thermodynamic conditions of vapor−liquid equilibrium for the confined fluid were determined. Our results are consistent with recent calculations for off-lattice models of confined water …

Estudio De La Eficiencia De Reactores Fotocatalíticos Heterogéneos, Jesus Moreira Del Rio

Jesus Moreira del Rio

No abstract provided.

Functional Principal Component Regression And Functional Partial Least Squares, Philip T. Reiss, R. Todd Ogden

Philip T. Reiss

Regression of a scalar response on signal predictors, such as near-infrared (NIR) spectra of chemical samples, presents a major challenge when, as is typically the case, the dimension of the signals far exceeds their number. Most solutions to this problem reduce the dimension of the predictors either by regressing on components--e.g. principal component regression (PCR) and partial least squares (PLS)--or by smoothing methods which restrict the coefficient function to the span of a spline basis. This paper introduces functional versions of PCR and PLS, which combine both of the above dimension reduction approaches. Two versions of functional PCR are developed, …

Simulations Of Bubble Column Reactors Using A Volume Of Fluid Approach: Effect Of Air Distributor, Abid Akhtar

Abid Akhtar Mr

Two- and three-dimensional numerical simulations have been performed on a laboratory scale bubble column reactor using a volume-of-fluid approach. The effect of hole-size and superficial gas velocity on the bubble size distribution and their trajectories has been investigated on a 20 cm diameter and 1 m high cylindrical reactor. All simulations were performed in a transient manner using a FLUENT solver. Surface tension between two phases has been modelled as a body force with a constant value. Turbulence was modelled using the k-(epsilon) turbulence approach. A comparison between simulation predictions and the reported experimental studies has shown a good agreement.

The Influence Of Amino Acid Sequence And Functionality On The Binding Process Of Peptides Onto Gold Surfaces, Gustavo Carri

Gustavo A. Carri

We present a molecular dynamics study of the binding process of peptide A3 (AYSSGAPPMPPF) and other similar peptides onto gold surfaces, and identify the functions of many amino acids. Our results provide a clear picture of the separate regimes present in the binding process: diffusion, anchoring, crawling and binding. Moreover, we explored the roles of individual residues. We found that tyrosine, methionine, and phenylalanine are strong binding residues; serine serves as an effective anchoring residue; proline acts as a dynamic anchoring point, while glycine and alanine give flexibility to the peptide backbone. We then show that our findings apply to …

The Many Faces Of Inductive Teaching And Learning, Michael Prince, R. Felder

Michael J. Prince

No abstract provided.

Cfd Simulations For Continuous Flow Of Bubbles Through Gas-Liquid Columns: Application Of Vof Method., Abid Akhtar

Abid Akhtar Mr

Hydrodynamics study of a continuous bubble chain rising through liquid column has been performed for laboratory scale bubble column using the volume-of-fluid (VOF) approach. The effect of operating and design parameters on the bubble size distribution and rise trajectory has been investigated for air-water system. For the same distributor, simulation results have indicated the formation of small bubbles at low superficial gas velocity and relatively large bubbles at higher velocities. The increase in the hole-size of distributor has shown similar behaviour. Analysis of bubble trajectories for different superficial gas velocities and distributors has demonstrated an oscillatory behaviour exhibited by small …

The Case For Inductive Teaching, Michael Prince, R. Felder, R. Brent

Michael J. Prince

No abstract provided.

Thermodynamic Calculations Using A Simulated Annealing Optimization Algorithm, Adrian Bonilla-Petriciolet, Juan Gabriel Segovia-Hernández, Florianne Castillo-Borja, Ulises I. Bravo-Sánchez

Adrian Bonilla-Petriciolet

Condiciones De Frontera Para El Transporte Entre Medios Multifásicos, Francisco J. Valdes-Parada

Francisco J. Valdes-Parada

Las condiciones de frontera adecuadas, ya sea de transferencia de cantidad de movimiento, calor o masa, entre dos regiones es un elemento indispensable en el desarrollo de modelos que describan el transporte en sistemas heterogéneos. Por tal razón, es común encontrar en la literatura condiciones de frontera que, si bien pueden ser adecuadas para describir un fenómeno particular, se obtuvieron empíricamente y frecuentemente incluyen coeficientes desconocidos.

Lo anterior ha despertado el interés de varios autores que, en las tres últimas décadas, han presentado metodologías que permiten obtener condiciones de frontera fundamentadas en la física del fenómeno estudiado. Entre las distintas …

Structure Analysis Of Nanocrystalline Mgo Aerogel Prepared By Sol-Gel Method, G. Dercz, L. Pajak, K. Prusik, R Pielaszek, Janusz J. Malinowski, Wojciech Pudło

Janusz J. Malinowski

Thermodynamic Calculations For Chemical Engineering Using A Simulated Annealing Optimization Method, Adrian Bonilla-Petriciolet, Juan Gabriel Segovia-Hernández, Florianne Castillo-Borja, Ulises I. Bravo-Sánchez

Adrian Bonilla-Petriciolet

In this paper, a memory-based Simulated Annealing is proposed to solve several thermodynamic calculations that are related to the modeling of phase equilibrium and thermodynamic properties. Specifically, we have tested the numerical performance of this optimization method in Gibbs energy minimization for flash calculations, calculation of homogeneous azeotropes and data fitting in thermodynamic models. Our results indicate that, in general, proposed method is reliable to solve these problems and shows a reasonable computational effort.