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Escalamiento De Dispersión De Contaminantes En La Ciudad De México, Francisco J. Valdes-Parada, J. Ruben varela-Ham 2010 Universidad Autonoma Metropolitana - Iztapalapa

Escalamiento De Dispersión De Contaminantes En La Ciudad De México, Francisco J. Valdes-Parada, J. Ruben Varela-Ham

Francisco J. Valdes-Parada

En días hábiles, la actividad vehicular más intensa en calles y avenidas de la ciudad de México se inicia a las 6:00 hs y se prolonga por aproximadamente 3 ó 4 horas. En ese periodo, la capa de mezclado permanece relativamente quieta y expuesta a recibir una carga importante de contaminantes producto de emisiones vehiculares. En esas condiciones de ausencia de movimientos atmosféricos verticales y horizontales, y de intensa actividad contaminante, adquieren importancia los procesos de dispersión que ocurren en la horizontal y a nivel del suelo.

En este trabajo se lleva a cabo un proceso de promediado de ...


Role Of Faculty In Promoting Lifelong Learning: Characterizing Classroom Environments, Susan M. Lord, John Chen, Katharyn E. K. Nottis, Candice Stefanou, Michael J. Prince, Jonathon Stolk 2010 University of San Diego

Role Of Faculty In Promoting Lifelong Learning: Characterizing Classroom Environments, Susan M. Lord, John Chen, Katharyn E. K. Nottis, Candice Stefanou, Michael J. Prince, Jonathon Stolk

Mechanical Engineering

Calls for educational reform emphasize the need for student-centered learning approaches that foster lifelong learning. To be a lifelong learner includes characteristics consistent with those of self-directed learners, such as being curious, motivated, reflective, analytical, persistent, flexible, and independent. Educational research has shown that the building of these aptitudes involves a complex interplay among nearly every aspect of human development. Instructor support of students’ self-directed learning (SDL) development relies on understanding and balancing these factors in the classroom. Engineering educators play a critical role in influencing outcomes related to SDL through their design of courses that support students’ transitions from ...


Field Evaluation Of Asphalt Overlays On State Route 30 In Northern Utah, Mark J. Butler 2010 Brigham Young University - Provo

Field Evaluation Of Asphalt Overlays On State Route 30 In Northern Utah, Mark J. Butler

All Theses and Dissertations

The purpose of this research was to compare the rutting, cracking, and development of roughness of two asphalt overlay types commonly used in northern Utah and to evaluate how well the Mechanistic-Empirical Pavement Design Guide (MEPDG) can predict the observed results. AC-10 and PG 64-34 asphalt overlay materials were paved in a checkerboard pattern at a test site on State Route 30 near Logan, Utah, and observed for 3 years at 6-month intervals. Primary data included rutting, cracking, and roughness. At the conclusion of the 3-year evaluation period, rut depths were 0.08 in. deeper, on average, in the AC-10 ...


Design Of A Shape Memory Alloy Thermal Actuator For Temperature Control In Solar Collectors, Nazita Taghavi 2010 Iowa State University

Design Of A Shape Memory Alloy Thermal Actuator For Temperature Control In Solar Collectors, Nazita Taghavi

Nazita Taghavi

Shape memory thermal actuators can be constructed using one-way or two-way shape memory effects. One-way shape memory actuators produce small stroke while two-way shape memory actuators can produce large forces and stroke. However, to build the two-way shape memory actuators suitable for a special application, one needs to conduct complicated experiments. The thermal actuator proposed in this thesis for controlling critical temperature in solar collectors, has resolved the problem of small stroke of one-way shape memory actuators and can be used for applications other than collectors which was subject of this thesis. In this thesis, the proposed actuator is designed ...


Parameters Estimation Of A Fan System Using Artificial Neural Networks (Anns),, D. K. Chaturvedi 2010 Dayalbagh Educational Institute

Parameters Estimation Of A Fan System Using Artificial Neural Networks (Anns),, D. K. Chaturvedi

D. K. Chaturvedi Dr.

Electric Fans are very commonly used in the industries, domestic applications and in tunnels for cooling and ventila-tion purposes. Fan parameters estimation is an important task as far as the reliable operation of a fan system is con-cerned. Basically, a fan is mainly consisting of a single phase induction motor and therefore fan system parameters are essentially the electrical parameters e.g. resistances, reactances and some load parameters (fan blades).These parame-ters often change under varying operating conditions and the knowledge of these parameters is necessary to have opti-mum and efficient operation of the system. Therefore, fan system parameters are ...


Short-Term Load Forecasting Using Soft Computing Techniques, D. K. Chaturvedi 2010 Dayalbagh Educational Institute

Short-Term Load Forecasting Using Soft Computing Techniques, D. K. Chaturvedi

D. K. Chaturvedi Dr.

Electric load forecasting is essential for developing a power supply strategy to improve the reliability of the ac power line data network and provide optimal load scheduling for developing countries where the demand is increased with high growth rate. In this paper, a short-term load forecasting realized by a generalized neu-ron–wavelet method is proposed. The proposed method consists of wavelet transform and soft computing technique. The wavelet transform splits up load time series into coarse and detail components to be the fea-tures for soft computing techniques using Generalized Neurons Network (GNN). The soft computing tech-niques forecast each component separately ...


Process Development For Advanced Complex Nuclear Oxide Fuels, Richard Reavis, Daniel Osterberg 2010 Department of Materials Science & Engineering, Boise State University

Process Development For Advanced Complex Nuclear Oxide Fuels, Richard Reavis, Daniel Osterberg

College of Engineering Poster Presentations

Oxide nuclear fuel processing has the ability to convert long-lived actinide waste into short-lived fission products through fast reactors. Research is needed to improve the overall efficiency of this process to ensure it is a viable and sustainable option. Boise State University (BSU) worked in collaboration with others to synthesize, consolidate, and characterize complex surrogate oxide systems for use as advanced nuclear fuels. The objective of this work was to demonstrate the atmosphere affects on the final composition and density of the final fuel. The scope of this work included the identification of surrogate fuel compositions (target fuels, mixed oxide ...


Rooftop Ventilator Senior Design Project, Gavin Moody, Nick Thompson, Jon Flack 2010 Department of Mechanical & Biomedical Engineering, Boise State University

Rooftop Ventilator Senior Design Project, Gavin Moody, Nick Thompson, Jon Flack

College of Engineering Poster Presentations

The purpose of this research was to explore the energy savings between passive and active ventilation techniques and explore the feasability of a hybrid solar ventilator. The methodology that was employed for this research involved fluid flow analysis, thermal and heat transfer analysis and system modeling and controls. Additionally, machine design skills such as stress, failure and fatigue analysis were employed to ensure the longevity of the final design. Results can be placed into two categories. First, annual savings in terms of energy consumption for active versus passive ventilation will be displayed for various geographical areas. Second, a hybrid solar ...


Shielded Cold Cathode Magnetron (Sccm), Tyler Rowe, Geoff Groff, Sonya Shawver, Brandon Wells 2010 Department of Electrical & Computer Engineering, Boise State University

Shielded Cold Cathode Magnetron (Sccm), Tyler Rowe, Geoff Groff, Sonya Shawver, Brandon Wells

College of Engineering Poster Presentations

A magnetron is a vacuum device that uses the interaction of electrons and an electric field to generate microwaves. Magnetrons are often used for radar systems. Current magnetrons create electrons by heating a tungsten wire to the point that it emits electrons. These systems waste large amounts of energy and are difficult to control. A shielded cold cathode magnetron is a new magnetron design that has the potential to greatly improve the magnetron’s efficiency. These new magnetrons utilize arrays of gated field emitters to inject the electrons into the electric field. These field emitters must be protected from electron ...


War Eagle Shopping Center, Megan Kautz, Jonathan Rocha, Peter McKenzie, Clemente Salinas, David McLenna 2010 Department of Civil Engineering, Boise State University

War Eagle Shopping Center, Megan Kautz, Jonathan Rocha, Peter Mckenzie, Clemente Salinas, David Mclenna

College of Engineering Poster Presentations

This senior design project is for the development of the War Eagle Shopping Center in Elmore county, Idaho. The shopping center is a part of the Elmore County comprehensive growth and development plan. The shopping center will be placed on 1,120 acres of land that is located fifteen miles northwest of Mountain Home, west of Interstate 84 and east of Simco Road. Our team will determine the required environmental and building permits, design the access and egress roadways, perform a nutrient pathogen study, design a wastewater treatment system, water supply systems, and a structure that includes two anchor stores ...


Characterization Of Emissions Of Wax-Based Products During Combustion, Ben Albiston, Crystal Grasmick 2010 Department of Materials Science & Engineering, Boise State University

Characterization Of Emissions Of Wax-Based Products During Combustion, Ben Albiston, Crystal Grasmick

College of Engineering Poster Presentations

Currently, over 40% of the global burden of disease is attributed to environmental factors; of this, 2.6% of disease is attributed to indoor pollutants. When considering that people currently spend about 85 percent of their time indoors, this is a concerning statistic. Environmental and health concerns have pushed scientists to develop new cleaner and greener burning wax-based products. E3 Fuels has developed an additive that is claimed to reduce the emissions, both particulate and gaseous, associated with the combustion of hydrocarbons in solid wax-based products. In this study, the aforementioned emissions were qualified and quantified in paraffin candles using ...


Multiphase Interleaving Buck Converter With Input-Output Bypass Capacitor, Taufik, Randyco Prasetyo, Arief Hernadi, Dodi Garinto 2010 California Polytechnic State University - San Luis Obispo

Multiphase Interleaving Buck Converter With Input-Output Bypass Capacitor, Taufik, Randyco Prasetyo, Arief Hernadi, Dodi Garinto

Electrical Engineering

As the number of transistors in microprocessors increases per Moore's Law their power requirement increases accordingly. This poses design challenges for their power supply module especially when microprocessors operate at sub voltage range. This paper presents a new multiphase topology that addresses these challenges. Laboratory tests on a hardware prototype of the topology shows improved performance compared to a commercially available power supply module.


Energy Modeling Using Feed-Forward Artificial Neural Networks, Dustyn Deakins 2010 Department of Campus Sustainability, Boise State University

Energy Modeling Using Feed-Forward Artificial Neural Networks, Dustyn Deakins

College of Engineering Poster Presentations

Buildings are responsible for over half the energy use in this country. Building energy use can be reduced by a few actions and one is energy conservation. This can be accomplished by knowing what the building energy use is currently and even better is what the energy use is going to be tomorrow, or next month, or even next year. By use of building energy models this will help monitor performance to ensure buildings are operating at peak performance and yield non-HVAC energy use. There has been many studies in this area and one of the many that have been ...


Personal Fall Protection: A Look At The Differences Among Industries, Nathan Miller 2010 Department of Construction Management, Boise State University

Personal Fall Protection: A Look At The Differences Among Industries, Nathan Miller

College of Engineering Poster Presentations

Fall prevention and protection is a mandatory part of nearly every type of construction. This project took a closer look at the fall protection equipment used in the construction industry relative to the equipment used in other industries. These industries include high rise window washing, rock climbing, utility lineman, and tree trimming. All of these industries rely on some form of fall protection and the equipment used varies per each unique application. In the construction industry, falls are the highest ranked cause of injury and account for roughly one third of all construction fatalities annually. A closer look at the ...


Compact Spiral Loaded Printed Monopole Antenna, Xiulong Bao, Max Ammann 2010 Dublin Institute of Technology

Compact Spiral Loaded Printed Monopole Antenna, Xiulong Bao, Max Ammann

Conference Papers

A novel miniaturized printed monopole structure is proposed. The antenna comprises a printed monopole strip which is loaded by a spiral located on the rearside connected by a via. The inductive loading provided by the spiral enables considerable miniaturization of antenna. A parametric study of key dimensional parameters and groundplane are discussed.


A Pattern Reconfigurable Slot Antenna With Hybrid Feed, Matthias John, Max Ammann 2010 Dublin Institute of Technology

A Pattern Reconfigurable Slot Antenna With Hybrid Feed, Matthias John, Max Ammann

Conference Papers

In this paper we investigate the design and operating principle of a pattern reconfigurable multi-mode slot antenna with a hybrid feed. The slot antenna is excited by an orthogonal arrangement of a co-planar waveguide (CPW) fed circular disc and a microstrip fed square patch. The design objective is to be able to change the direction of the main lobe by feeding the two orthogonal elements with different phases.


Development Of Distributed Generation Infrastructure For Microgrid Connectivity To Operational Power Systems, Nayeem Mohammad Abdullah 2010 Florida International University

Development Of Distributed Generation Infrastructure For Microgrid Connectivity To Operational Power Systems, Nayeem Mohammad Abdullah

FIU Electronic Theses and Dissertations

Distributed Generation (DG) from alternate sources and smart grid technologies represent good solutions for the increase in energy demands. Employment of these DG assets requires solutions for the new technical challenges that are accompanied by the integration and interconnection into operational power systems.

A DG infrastructure comprised of alternate energy sources in addition to conventional sources, is developed as a test bed. The test bed is operated by synchronizing, wind, photovoltaic, fuel cell, micro generator and energy storage assets, in addition to standard AC generators. Connectivity of these DG assets is tested for viability and for their operational characteristics. The ...


Modeling The Dynamics Of Network Technology Adoption And The Role Of Converters, Soumya Sen, Youngmi Jin, Roch A. Guérin, Kartik Hosanagar 2010 University of Pennsylvania

Modeling The Dynamics Of Network Technology Adoption And The Role Of Converters, Soumya Sen, Youngmi Jin, Roch A. Guérin, Kartik Hosanagar

Departmental Papers (ESE)

New network technologies constantly seek to displace incumbents. Their success depends on technological superiority, the size of the incumbent’s installed base, users’ adoption behaviors, and various other factors. The goal of this paper is to develop an understanding of competition between network technologies, and identify the extent to which different factors, in particular converters (a.k.a. gateways), affect the outcome. Converters can help entrants overcome the influence of the incumbent’s installed base by enabling cross-technology interoperability. However, they have development, deployment, and operations costs, and can introduce performance degradations and functionality limitations, so that if, when, why ...


High Frequency Acceleration Feedback Significantly Increases The Realism Of Haptically Rendered Textured Surfaces, William McMahan, Joseph M. Romano, Amal M. Abdul Rahuman, Katherine J. Kuchenbecker 2010 University of Pennsylvania

High Frequency Acceleration Feedback Significantly Increases The Realism Of Haptically Rendered Textured Surfaces, William Mcmahan, Joseph M. Romano, Amal M. Abdul Rahuman, Katherine J. Kuchenbecker

Departmental Papers (MEAM)

Almost every physical interaction generates high frequency vibrations, especially if one of the objects is a rigid tool. Previous haptics research has hinted that the inclusion or exclusion of these signals plays a key role in the realism of haptically rendered surface textures, but this connection has not been formally investigated until now. This paper presents a human subject study that compares the performance of a variety of surface rendering algorithms for a master-slave teleoperation system; each controller provides the user with a different combination of position and acceleration feedback, and subjects compared the renderings with direct tool-mediated exploration of ...


Spatially Distributed Tactile Feedback For Kinesthetic Motion Guidance, Pulkit Kapur, Mallory Jensen, Laurel J. Buxbaum, Steven A. Jax, Katherine J. Kuchenbecker 2010 University of Pennsylvania

Spatially Distributed Tactile Feedback For Kinesthetic Motion Guidance, Pulkit Kapur, Mallory Jensen, Laurel J. Buxbaum, Steven A. Jax, Katherine J. Kuchenbecker

Departmental Papers (MEAM)

Apraxic stroke patients need to perform repetitive arm movements to regain motor functionality, but they struggle to process the visual feedback provided by typical virtual rehabilitation systems. Instead, we imagine a low cost sleeve that can measure the movement of the upper limb and provide tactile feedback at key locations. The feedback provided by the tactors should guide the patient through a series of desired movements by allowing him or her to feel limb configuration errors at each instant in time. After discussing the relevant motion capture and actuator options, this paper describes the design and programming of our current ...


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