Engineering Commons^™

Power Quality Emission Assessment Of Photovoltaic Inverters Based On Iec Technical Report 61000-3-15:2011, Devinda Perera, Philip Ciufo, Lasantha G. Meegahapola, Sarath Perera

Dr Philip Ciufo

The International Electrotechnical Committee Technical Report IEC 61000-3-15:2011 provides electromagnetic compatibility requirements and test conditions for distributed generators up to 75 A per phase. In the current research, two commercially available photovoltaic (PV) inverters up to the capacity of 3600 W were tested following the guidelines proposed in IEC 61000-3-15 in relation to low order harmonic emission and flicker emission. In addition, the harmonic and flicker emission behaviour of the PV inverters were investigated under varying irradiation conditions. Both PV inverters were observed to comply with the emission requirements prescribed by the technical report under most conditions except for even …

Dependence Of Magnetoelectric Properties On Sintering Temperature For Nano-Sic-Doped Mgb2/Fe Wires Made By Combined In Situ/Ex Situ Process, Wenxian Li, Rong Zeng, Jiazhao Wang, Y Li, S. X. Dou

Shi Xue Dou

Very fine nano-SiC particles (nm) were doped into a MgB2 superconductor. The influence of self-field supercurrent on the high-field performance of the nano-SiC-doped MgB2/Fe wires is discussed based on comparison of the critical current densities of the in situ processed nano-SiCdoped MgB2 wires and those of the nano-SiC-doped MgB2/Fe wires processed by the combination of in situ/ex situ methods.

Tornadoes In Canada: Improving Our Understanding, David Sills

Goderich August 21 2011 F3 Tornado Associated Files

Environment Canada presentation at ICLR

• What is a tornado?

• How do tornadoes form?

• How are tornadoes rated?

• Where / when do tornadoes occur?

• How does EC provide tornado alerts?

• Are tornadoes in Canada increasing in frequency and/or intensity?

Power Quality Emission Assessment Of Photovoltaic Inverters Based On Iec Technical Report 61000-3-15:2011, Devinda Perera, Philip Ciufo, Lasantha G. Meegahapola, Sarath Perera

Faculty of Engineering and Information Sciences - Papers: Part A

The International Electrotechnical Committee Technical Report IEC 61000-3-15:2011 provides electromagnetic compatibility requirements and test conditions for distributed generators up to 75 A per phase. In the current research, two commercially available photovoltaic (PV) inverters up to the capacity of 3600 W were tested following the guidelines proposed in IEC 61000-3-15 in relation to low order harmonic emission and flicker emission. In addition, the harmonic and flicker emission behaviour of the PV inverters were investigated under varying irradiation conditions. Both PV inverters were observed to comply with the emission requirements prescribed by the technical report under most conditions except for even …

Slides: Hydrofracking: Air Issues And Community Exposure, Debra A. Kaden

Air Quality Impacts from Oil and Gas Development (January 27)

Presenter: Debra Kaden, Ph.D., Toxicologist, ENVIRON International Corporation, discusses air concentrations of chemicals of potential health concern surrounding oil and gas development activities, as well as temporal and spatial patterns of these chemicals in the ambient environment. Such information is necessary to evaluate possible health impacts of the drilling process on air in surrounding communities.

19 slides

Slides: Jisea Natural Gas Study: Potential U.S. Electric Power Futures, Jeffrey Logan

Drawing the Blueprint for a Sustainable Natural Gas Future (January 18)

Presenter: Jeffrey Logan, Denver Museum of Nature and Science

4 slides

Slides: Current And Proposed Research Activities Addressing Health, Environmental, Economic, And Political Issues Related To Natural Gas Development, University Of Colorado. School Of Public Health. Department Of Environmental And Occupational Health

Drawing the Blueprint for a Sustainable Natural Gas Future (January 18)

Presenter: Department of Environmental and Occupational Health, University of Colorado School of Public Health

20 slides

Dependence Of Magnetoelectric Properties On Sintering Temperature For Nano-Sic-Doped Mgb2/Fe Wires Made By Combined In Situ/Ex Situ Process, Wenxian Li, Rong Zeng, Jiazhao Wang, Y Li, S. X. Dou

Faculty of Engineering - Papers (Archive)

Very fine nano-SiC particles (nm) were doped into a MgB2 superconductor. The influence of self-field supercurrent on the high-field performance of the nano-SiC-doped MgB2/Fe wires is discussed based on comparison of the critical current densities of the in situ processed nano-SiCdoped MgB2 wires and those of the nano-SiC-doped MgB2/Fe wires processed by the combination of in situ/ex situ methods.

Creating Tomorrow, Fall 2011, College Of Engineering

College of Engineering Magazines

Annual magazine for the College of Engineering at Utah State University.

In The Path Of An F3 Tornado, Bob David

Goderich August 21 2011 F3 Tornado Associated Files

the Port of Goderich Approximate path of the tornado, August 21, 2011 4:00 p.m. Direction of travel NW to SE for a distance of about 20 km.

Winds reached up to 300 km per hour. The width of the path averaged about 500 metres.

Storm Damage Survey Report Goderich 2011 August, Randy Mawson, David Sills, Arnold Ashton, Ian Hay

Goderich August 21 2011 F3 Tornado Associated Files

Sifto salt mine at lakeshore had signficant damage, with various machinery, booms, and buildings damaged or destroyed. One Sifto employee was killed. The tornado struck right through the exact centre of the downtown, causing F3 damage there. At the central square with the courthouse, the north side had trees down from the north, and the south side had trees down from the south. Many heritage brick buildings heavily damaged. Vehicles tossed and rolled. Some of the buildings hardest-hit by the tornado, like the landmark Victoria Street United Church and the former opera house, have been torn down. In residential areas, …

2011 Safety Belt Usage Survey In Kentucky, Eric R. Green, Kenneth R. Agent

Kentucky Transportation Center Research Report

EXECUTIVE SUMMARY

The objective of this study was to establish 2011 safety belt and child safety seat usage rates in Kentucky . The 2011 survey continues to document the results after enactment of the original “secondary enforcement” statewide mandatory safety belt law in 1994 and the subsequent change to “primary enforcement” which was enacted in 2 006. Data were collected at 160 randomly selected sites in 18 counties across Kentucky. Data from the individual sites were combined into a statewide percentage considering roadway functional classification, county, and vehicle miles traveled.

The data show that the usage rate in 2011 (82.2 …

Materials For Presentation: Water Banks: Voluntary And Flexible Water Supplies For The Colorado River's Uncertain Future [Outline], Robert Wigington

Navigating the Future of the Colorado River (Martz Summer Conference, June 8-10)

4 pages.

"Robert Wigington, The Nature Conservancy"

Person-Thing Orientation As A Predictor Of Engineering Persistence And Success, Ida Ngambeki, Demetra Evangelou Dr, William Graziano, Diana N Bairaktarova, Sara E Branch, Anna Woodcock

School of Engineering Education Graduate Student Series

Interest, especially in the United States, is an important motivation for students in choosing a major and the strength of their commitment to remaining in that major. In the examination of engineering students’ reasons for persistence and success, interest has not received an in-depth treatment. Interest as a motivational factor can be characterized and operationalized in several ways. Engineering is often typified as a discipline that primarily deals with the creation and manipulation of man-made artefacts as opposed to a discipline centered on interpersonal interaction. For this study interest has been characterized along the Person-Thing dimension.This has been operationalized as …

Returning Students In Engineering Education: Making A Case For “Experience Capital”, Michele L. Strutz, James E. Cawthorne Jr, Daniel M. Ferguson, Mark T. Carnes, Matthew Ohland

School of Engineering Education Graduate Student Series

Students returning to college are not generally studied, where most of the research on non-traditional students is focused on individuals returning to earn their undergraduate degree. There are, however, many students returning to receive graduate degrees as they pursue new directions in life by interest or economic necessity. Undergraduate students with experience have clear educational related goals, practical approaches to problem-solving, and high learning motivation.Returning graduate students are expected to model similar behaviors. These individuals bring a lifetime of personal and professional expertise, which we identify as “experience capital.”A review of the literature reveals that capital has been pondered since …

Three Deadly Venoms: Phenomenology, Existentialism, And Philosophical Constructs To Expand Engineering Education Research Methodologies And Philosophy, George Dante Ricco

School of Engineering Education Graduate Student Series

The Engineer through a Multidisciplinary Lens Our work invokes multiple theoretical approaches to the question of the engineer’s perception of his/her place in the field of engineering through lenses within social psychology and modern philosophy. We aim to help augment current conversations on and further dialogue as to what engineering is from ethnomethodological (or existential phenomenological) and symbolic interactionism points of view. The foundation of our work is the current state of engineering and how to address the engineer’s negotiation of his/her state of affairs. We believe this work has strong implications amidst recent publications invoking epistemologies based upon modern …

Engineering Children's Literature: Development Of An Engineering Storybook For Young Children, Brianna L. Dorie, Monica Cardella

School of Engineering Education Graduate Student Series

While the notions of doctor, teacher and firefighter are ubiquitous in young literature,there is a lack of engagement about engineering (Holbrook et al., 2008). Picture books are a compelling medium for introducing concepts to children at a young age. Story books have the ability to present new information, increase stimulation of the imagination, and deliver messages both moral and social. In a school setting, story books have been shown to impact kindergartener’s mathematical achievement when produced in tandem with a mathematics unit (Keat & Wilburne, 2009). However, there have been little to no studies regarding the impact of engineering literature …

Integrating Children’S Literature Into Occupational Learning About Engineers, Brianna L. Dorie, Monica Cardella

School of Engineering Education Graduate Student Series

At a very young age, a child has the ability to formulate ideas regarding the occupation of a lawyer, a nurse or even a doctor. However, studies have shown that most children have limited information regarding engineers, and the lack of knowledge can often perpetuate into adulthood(Cunningham et al., 2005; NAE, 2002). Augur et al. (2005) found that “occupational aspirations and expectations of children undergo dramatic development changes during the elementary years, as well as resisting change in other respects.” This means prior to school education,children have already formed their perception of occupations and that stereotypical attributes have already been …

Doctoral Students As Course Instructors: Three Engineering Teaching Assistants' Socialization Experiences, Irene Mena, Heidi Diefes-Dux, Brenda Capobianco

School of Engineering Education Graduate Student Series

The purpose of this study was to explore and understand the types of socialization experiences that result from engineering graduate teaching assistants‟ (TAs) roles as course instructors. Socialization refers to an individual‟s process of becoming a part of a group. In the context of doctoral education, socialization can be a complex area to study, largely because there are many roles and groups for which graduate students can be socialized.

Using situated learning, more specifically the communities of practice literature, as the theoretical framework, this study looked at how three doctoral engineering TAs, with experience as course instructors, become members of …

Motivations And Benefits For College Students Serving As Mentors In A High School Robotics Competition, Noah Salzman, Johannes Strobel

School of Engineering Education Graduate Student Series

Many universities provide space for student organizations in which undergraduate students are learning leadership skills, mentor other students and bring their engineering skills to practice.Purdue FIRST Programs (PFP) is a service-learning program where university students mentor predominantly high school student teams participating in the FIRST Robotics Competition (FRC). Whereas most FRC teams are mentored by professional engineers, PFP is unique in both the extent which it relies on student mentors and the overall scope of the organization. Existing models of mentorship do not adequately describe the specific relationship between the college and high schools students: (1) Due to the proximity …

Exploring The Motivations For Migration Among Engineering Students, Ida Ngambeki, Demetra Evangelou Dr, Matthew Ohland, George Dante Ricco

School of Engineering Education Graduate Student Series

Students often graduate from a major other than that in which they first enrolled. A large proportion of this migration happens within engineering with students moving from one discipline of engineering to another. This movement between disciplines sometimes happens several times. While there has been extensive examination of why students leave engineering,very little research has looked into why students leave one engineering discipline for another.Longitudinal data collected from several engineering colleges has shown that there are definite trends within the movement of engineering students.This study examines the reasons for some of these trends using a unique approach which combines both …

Exploring Curriculum Flexibility And Compliance Through The Use Of A Metric For Curricular Progression, George Dante Ricco, Matthew Ohland

School of Engineering Education Graduate Student Series

No abstract provided.