Jodi Reeves - Academia.edu (original) (raw)

Papers by Jodi Reeves

As universities continue to offer more distance education through online courses, they face the c... more As universities continue to offer more distance education through online courses, they face the challenge of translating onsite best practices into online courses in order to enhance student engagement, improve student persistence, and optimize student retention in STEAM (Science, Technology, Engineering, Arts, and Math) programs. This paper describes how we adapted face-to-face classroom engagement techniques related to group discussions (both synchronous and asynchronous) and labs into online courses in applied engineering and digital media design at National University.

Applied Physics Letters, 2000

Coupled magneto-optical imaging and local misorientation angle mapping have been used to demonstr... more Coupled magneto-optical imaging and local misorientation angle mapping have been used to demonstrate the percolative nature of supercurrent flow in YBa2Cu3O7−x(YBCO) coated conductors grown on deformation-textured Ni substrates. Barriers to current flow occur at many YBCO grain boundaries (GBs) which have propagated through the buffer layers from the underlying Ni substrate, and all Ni GBs with misorientation angles >4° initiate percolative current flow. This type of current barrier is characteristic of the conductor form and has been found to exist in samples with Jc(0 T,77 K) values >2 MA/cm2. Sharpening of the local substrate texture or improving in low-angle GB properties should lead to higher Jc values.

2001 Annual Conference Proceedings

2013 ASEE Annual Conference & Exposition Proceedings

2013 ASEE Annual Conference & Exposition Proceedings

Microscopy and Microanalysis

Superconducting thin films of YBa 2 Cu 3 O 7-x (YBCO) grown on various single crystal substrates ... more Superconducting thin films of YBa 2 Cu 3 O 7-x (YBCO) grown on various single crystal substrates including SrTiO 3 (STO), LaAlO 3 , Al 2 O 3 and MgO are of great interest because of their potential application to the generation and transmission of electrical power [1,2]. Understanding how to achieve the maximum critical current density in YBCO requires establishing the relationship between film growth parameters and a variety of other parameters including film composition, morphology, thickness, grain size, resistivity, grain orientation, and phase distribution. Therefore it is not surprising that many different characterization techniques must be used to obtain this information including x-ray diffraction, scanning electron microscopy/energy dispersive x-ray analysis (SEM/EDS), focused ion beam microscopy, analytical transmission electron microscopy and current-voltage measurements at 77 K in self-field to determine critical current density.

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

Measurement of the total sputtering yields of Ag/Cu two-phase alloy targets for normally incident... more Measurement of the total sputtering yields of Ag/Cu two-phase alloy targets for normally incident 200 and 100 eV Ar + ions have been performed. The dose was approximately 10 19 ions and the target temperature was held at about 20°C. A graph of total sputtering yield versus Ag/Cu (at.%) composition is "V-shaped" with the yield of all compositions being lower than either pure Cu or pure Ag. The total sputtering yield is defined as the number of sputtered atoms of any type divided by the number of incident ions. The total yield was calculated assuming stoichiometric component ejection during the entire bombardment time. The validity of this assumption and its effect on the results is discussed. The surfaces of the sputtered targets were covered with a variety of pronounced cones, ridges, and pebble-like features. It is hypothesized that a redeposition "shadow effect" is responsible for the lowered yield. When the developing surface features or projections become tall enough, material ejected from one projection will be redeposited onto neighboring projections resulting in a reduced sputtering yield. Interestingly, the "V-shaped" yield versus composition curve is very similar in structure to the Ag/Cu solidification curve in the Ag/Cu phase diagram. A plausible explanation for this correlation follows from the fact that the average crystallite sizes of the alloy compositions scale with the solidification curve. Compositions with the lowest melting temperature have the smallest average crystallite sizes. The smaller the crystallites the faster they will be covered by the yield lowering surface projections. Selective sputtering and surface diffusion fed "seed" cones appear to be the two most important mechanisms contributing to the formation of the roughened surrace topography.

2016 ASEE Annual Conference & Exposition Proceedings, 2000

He is the Lead Faculty for MS Sustainability Management Program. He develops and teaches Engineer... more He is the Lead Faculty for MS Sustainability Management Program. He develops and teaches Engineering and Sustainability Management graduate level courses. Ben has taught Sustainability workshops in Los Angeles (Army) and San Diego (SDGE). His special interests and research include promoting Leadership in Sustainability Practices, energy management of Data Centers and to establish Sustainable strategies for enterprises. He is an Affiliate Researcher at Lawrence Berkeley National Laboratory, Berkeley, CA, focusing on the energy efficiency of IT Equipment in a Data Centers. As a means of promoting student-centric learning, Prof. Radhakrishnan has successfully introduced games in to his sustainability classes where students demonstrate the 3s of sustainability, namely, Environment, Economics and Equity, through games. Students learn about conservation (energy, water, waste, equity, etc.) through games and quantifying the results. He has published papers on this subject and presented them in conferences. Before his teaching career, he had a very successful corporate management career working in R&D at Lucent Technologies and as the Director of Global Technology Management at Qualcomm. He had initiated and managed software development for both the companies in India. Prof. Radhakrishnan holds Masters Degrees (M.Tech, M.S., M.B.A) and Sustainable Business Practices certification from

2015 ASEE Annual Conference and Exposition Proceedings, 2000

National University in San Diego, CA. She teaches courses in design engineering, engineering mana... more National University in San Diego, CA. She teaches courses in design engineering, engineering management, and data analytics. Prior to academia, she worked for almost ten years as a quality control manager, engineering project manager, and senior scientist responsible for failure analysis of thin film materials. She invented new quality control tools and supervised interns from local universities and community colleges as part of a $5.0 million technical workforce development initiative funded by New York State. She has published diverse articles on topics ranging from engineering education to high temperature superconductors and has spoken at many national and international conferences. Her doctorate in materials science and engineering is from the University of Wisconsin, Madison, and she holds five patents.

Microstructural barriers to supercurrent occur on many length scales in all high temperature oxid... more Microstructural barriers to supercurrent occur on many length scales in all high temperature oxide superconductors. Eliminating microstructural barriers is key to making these potentially valuable materials more favorable for commercial applications. In silver-sheathed Bi2Sr2CaCu 2Ox (Bi-2212) tapes and multifilaments, the principal barriers on the scale of 10--100's of micrometers are bubbling, porosity, second phase particles, and poorly aligned grains. In state-of-the-art YBa2 Cu3Ox (YBCO) coated conductors, supercurrent barriers on the 0.1--100mum scale are grain boundaries. This thesis work clarifies the role of grain boundaries in the nickel substrate of RABiTS (Rolling Assisted Biaxially Textured Substrate) coated conductors. Plan-view SEM imaging, focused ion beam cutting, magneto-optical imaging and grain orientation mapping were used to determine barriers to supercurrent. Experiments showed enhanced magnetic flux penetration, and hence reduced Jc, in the YBCO above nearly all nickel grain boundaries with misorientation angles (theta) greater than 5°, independent of the rotation axis. Monochromatic backscattered electron Kikuchi pattern percolation maps imply there is a fully connected current path through the YBCO microstructure within the chosen tolerance angle criterion of the map. However, it is the grain boundary map that displays the constrictions of the current path. Therefore, grain boundary maps are better tools for illustrating supercurrent barriers than percolation maps. Grain boundary maps and grain orientation maps were used to investigate how the texture of the substrate was transferred to the buffer layers and to the superconductor. Most grasp boundaries in the nickel were replicated in the buffer and superconductor layers with the same misorientation angle. Anisotropic growth and/or surface energy minimization may be responsible for the improvement in c-axis alignment in the YBCO over the buffer layer. However, the YBCO mosaic spread did not eliminate high angle grain boundaries, since >5° boundaries were still seen in YBCO grain boundary maps. The results of this study on microstructural current barriers show that Jc improvements in RABiTS-type coated conductors require eliminating theta > 5° boundaries in the nickel substrate.

In July 1998, more than 40 graduate students, recent Ph.D.s, and new faculty from around the nati... more In July 1998, more than 40 graduate students, recent Ph.D.s, and new faculty from around the nation converged at the University of Wisconsin-Madison College of Engineering to participate in the Engineering Education Scholars Program (EESP). EESP consisted of presentations by nationally and locally recognized speakers, workshops to help attendees bridge the gap between pedagogical theory and teaching practice, and activities to develop course objectives, outcomes, activities, and assessments. This paper highlights how some Scholars have already started to implement new teaching strategies gained from EESP in the areas of group problem-solving and adjusting teaching styles to fit a diverse student audience. Additionally, the paper will relate evaluation results and document how 1998 participants are already finding themselves being "change agents" in engineering education. What is EESP? This section will enumerate the goals of the Engineering Education Scholars Program (EESP...

2015 ASEE Annual Conference and Exposition Proceedings, 2015

am also the Program Lead for MS in Information Technology Management and have also served recentl... more am also the Program Lead for MS in Information Technology Management and have also served recently as the lead for BSc in Information Systems, the co-Lead for MSc Computer Science and Program Lead for MSc in Database Administration programs. My association with ABET (Accreditation Board of Engineering and Technology) US dates back to 2001, as a certified program evaluator for BSc in Computer Science and BSc in Information Systems. At present, I am also serving as the Commissioner for the Computer Accreditation Commission (CAC). Previously, I have taught at 6 different countries for over 25 years. I have been privileged to be part of the DESY Group (Deutches Elecktronen Synchrotron), Hamburg Germany, as a research fellow, and worked with an MIT group, led by a Nobel laureate. On the research side, I have been fortunate enough to secure a number of grants and have served on numerous international Ph.D. Thesis committees, been a member of the editorial boards for 7 international journals, and served as the Chair and Co-Chair for 12 international conferences. For recognition of my research activities, I have been invited to a number of international conferences as Invited Speaker, chaired panel discussions and numerous international conference sessions. I have served on more than 150 international conference program committees. Furthermore, I have published number of articles in peerreviewed international journals and conferences. I am also an active member of ACM, ASEE, ASEE/PSW and CSAB.

FIE '98. 28th Annual Frontiers in Education Conference. Moving from 'Teacher-Centered' to 'Learner-Centered' Education. Conference Proceedings (Cat. No.98CH36214), 1998

Abstract Many creative and effective teaching strategies are forgotten or misplaced between semes... more Abstract Many creative and effective teaching strategies are forgotten or misplaced between semesters, only to be learned anew in subsequent semesters or lost forever. Beginning in September 1997, the University of Wisconsin-Madison College of Engineering linked its ...

As universities continue to offer more distance education through online courses, they face the c... more As universities continue to offer more distance education through online courses, they face the challenge of translating onsite best practices into online courses in order to enhance student engagement, improve student persistence, and optimize student retention in STEAM (Science, Technology, Engineering, Arts, and Math) programs. This paper describes how we adapted face-to-face classroom engagement techniques related to group discussions (both synchronous and asynchronous) and labs into online courses in applied engineering and digital media design at National University.

Applied Physics Letters, 2000

Coupled magneto-optical imaging and local misorientation angle mapping have been used to demonstr... more Coupled magneto-optical imaging and local misorientation angle mapping have been used to demonstrate the percolative nature of supercurrent flow in YBa2Cu3O7−x(YBCO) coated conductors grown on deformation-textured Ni substrates. Barriers to current flow occur at many YBCO grain boundaries (GBs) which have propagated through the buffer layers from the underlying Ni substrate, and all Ni GBs with misorientation angles >4° initiate percolative current flow. This type of current barrier is characteristic of the conductor form and has been found to exist in samples with Jc(0 T,77 K) values >2 MA/cm2. Sharpening of the local substrate texture or improving in low-angle GB properties should lead to higher Jc values.

2001 Annual Conference Proceedings

2013 ASEE Annual Conference & Exposition Proceedings

2013 ASEE Annual Conference & Exposition Proceedings

Microscopy and Microanalysis

Superconducting thin films of YBa 2 Cu 3 O 7-x (YBCO) grown on various single crystal substrates ... more Superconducting thin films of YBa 2 Cu 3 O 7-x (YBCO) grown on various single crystal substrates including SrTiO 3 (STO), LaAlO 3 , Al 2 O 3 and MgO are of great interest because of their potential application to the generation and transmission of electrical power [1,2]. Understanding how to achieve the maximum critical current density in YBCO requires establishing the relationship between film growth parameters and a variety of other parameters including film composition, morphology, thickness, grain size, resistivity, grain orientation, and phase distribution. Therefore it is not surprising that many different characterization techniques must be used to obtain this information including x-ray diffraction, scanning electron microscopy/energy dispersive x-ray analysis (SEM/EDS), focused ion beam microscopy, analytical transmission electron microscopy and current-voltage measurements at 77 K in self-field to determine critical current density.

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

Measurement of the total sputtering yields of Ag/Cu two-phase alloy targets for normally incident... more Measurement of the total sputtering yields of Ag/Cu two-phase alloy targets for normally incident 200 and 100 eV Ar + ions have been performed. The dose was approximately 10 19 ions and the target temperature was held at about 20°C. A graph of total sputtering yield versus Ag/Cu (at.%) composition is "V-shaped" with the yield of all compositions being lower than either pure Cu or pure Ag. The total sputtering yield is defined as the number of sputtered atoms of any type divided by the number of incident ions. The total yield was calculated assuming stoichiometric component ejection during the entire bombardment time. The validity of this assumption and its effect on the results is discussed. The surfaces of the sputtered targets were covered with a variety of pronounced cones, ridges, and pebble-like features. It is hypothesized that a redeposition "shadow effect" is responsible for the lowered yield. When the developing surface features or projections become tall enough, material ejected from one projection will be redeposited onto neighboring projections resulting in a reduced sputtering yield. Interestingly, the "V-shaped" yield versus composition curve is very similar in structure to the Ag/Cu solidification curve in the Ag/Cu phase diagram. A plausible explanation for this correlation follows from the fact that the average crystallite sizes of the alloy compositions scale with the solidification curve. Compositions with the lowest melting temperature have the smallest average crystallite sizes. The smaller the crystallites the faster they will be covered by the yield lowering surface projections. Selective sputtering and surface diffusion fed "seed" cones appear to be the two most important mechanisms contributing to the formation of the roughened surrace topography.

2016 ASEE Annual Conference & Exposition Proceedings, 2000

He is the Lead Faculty for MS Sustainability Management Program. He develops and teaches Engineer... more He is the Lead Faculty for MS Sustainability Management Program. He develops and teaches Engineering and Sustainability Management graduate level courses. Ben has taught Sustainability workshops in Los Angeles (Army) and San Diego (SDGE). His special interests and research include promoting Leadership in Sustainability Practices, energy management of Data Centers and to establish Sustainable strategies for enterprises. He is an Affiliate Researcher at Lawrence Berkeley National Laboratory, Berkeley, CA, focusing on the energy efficiency of IT Equipment in a Data Centers. As a means of promoting student-centric learning, Prof. Radhakrishnan has successfully introduced games in to his sustainability classes where students demonstrate the 3s of sustainability, namely, Environment, Economics and Equity, through games. Students learn about conservation (energy, water, waste, equity, etc.) through games and quantifying the results. He has published papers on this subject and presented them in conferences. Before his teaching career, he had a very successful corporate management career working in R&D at Lucent Technologies and as the Director of Global Technology Management at Qualcomm. He had initiated and managed software development for both the companies in India. Prof. Radhakrishnan holds Masters Degrees (M.Tech, M.S., M.B.A) and Sustainable Business Practices certification from

2015 ASEE Annual Conference and Exposition Proceedings, 2000

National University in San Diego, CA. She teaches courses in design engineering, engineering mana... more National University in San Diego, CA. She teaches courses in design engineering, engineering management, and data analytics. Prior to academia, she worked for almost ten years as a quality control manager, engineering project manager, and senior scientist responsible for failure analysis of thin film materials. She invented new quality control tools and supervised interns from local universities and community colleges as part of a $5.0 million technical workforce development initiative funded by New York State. She has published diverse articles on topics ranging from engineering education to high temperature superconductors and has spoken at many national and international conferences. Her doctorate in materials science and engineering is from the University of Wisconsin, Madison, and she holds five patents.

Microstructural barriers to supercurrent occur on many length scales in all high temperature oxid... more Microstructural barriers to supercurrent occur on many length scales in all high temperature oxide superconductors. Eliminating microstructural barriers is key to making these potentially valuable materials more favorable for commercial applications. In silver-sheathed Bi2Sr2CaCu 2Ox (Bi-2212) tapes and multifilaments, the principal barriers on the scale of 10--100's of micrometers are bubbling, porosity, second phase particles, and poorly aligned grains. In state-of-the-art YBa2 Cu3Ox (YBCO) coated conductors, supercurrent barriers on the 0.1--100mum scale are grain boundaries. This thesis work clarifies the role of grain boundaries in the nickel substrate of RABiTS (Rolling Assisted Biaxially Textured Substrate) coated conductors. Plan-view SEM imaging, focused ion beam cutting, magneto-optical imaging and grain orientation mapping were used to determine barriers to supercurrent. Experiments showed enhanced magnetic flux penetration, and hence reduced Jc, in the YBCO above nearly all nickel grain boundaries with misorientation angles (theta) greater than 5°, independent of the rotation axis. Monochromatic backscattered electron Kikuchi pattern percolation maps imply there is a fully connected current path through the YBCO microstructure within the chosen tolerance angle criterion of the map. However, it is the grain boundary map that displays the constrictions of the current path. Therefore, grain boundary maps are better tools for illustrating supercurrent barriers than percolation maps. Grain boundary maps and grain orientation maps were used to investigate how the texture of the substrate was transferred to the buffer layers and to the superconductor. Most grasp boundaries in the nickel were replicated in the buffer and superconductor layers with the same misorientation angle. Anisotropic growth and/or surface energy minimization may be responsible for the improvement in c-axis alignment in the YBCO over the buffer layer. However, the YBCO mosaic spread did not eliminate high angle grain boundaries, since >5° boundaries were still seen in YBCO grain boundary maps. The results of this study on microstructural current barriers show that Jc improvements in RABiTS-type coated conductors require eliminating theta > 5° boundaries in the nickel substrate.

In July 1998, more than 40 graduate students, recent Ph.D.s, and new faculty from around the nati... more In July 1998, more than 40 graduate students, recent Ph.D.s, and new faculty from around the nation converged at the University of Wisconsin-Madison College of Engineering to participate in the Engineering Education Scholars Program (EESP). EESP consisted of presentations by nationally and locally recognized speakers, workshops to help attendees bridge the gap between pedagogical theory and teaching practice, and activities to develop course objectives, outcomes, activities, and assessments. This paper highlights how some Scholars have already started to implement new teaching strategies gained from EESP in the areas of group problem-solving and adjusting teaching styles to fit a diverse student audience. Additionally, the paper will relate evaluation results and document how 1998 participants are already finding themselves being "change agents" in engineering education. What is EESP? This section will enumerate the goals of the Engineering Education Scholars Program (EESP...

2015 ASEE Annual Conference and Exposition Proceedings, 2015

am also the Program Lead for MS in Information Technology Management and have also served recentl... more am also the Program Lead for MS in Information Technology Management and have also served recently as the lead for BSc in Information Systems, the co-Lead for MSc Computer Science and Program Lead for MSc in Database Administration programs. My association with ABET (Accreditation Board of Engineering and Technology) US dates back to 2001, as a certified program evaluator for BSc in Computer Science and BSc in Information Systems. At present, I am also serving as the Commissioner for the Computer Accreditation Commission (CAC). Previously, I have taught at 6 different countries for over 25 years. I have been privileged to be part of the DESY Group (Deutches Elecktronen Synchrotron), Hamburg Germany, as a research fellow, and worked with an MIT group, led by a Nobel laureate. On the research side, I have been fortunate enough to secure a number of grants and have served on numerous international Ph.D. Thesis committees, been a member of the editorial boards for 7 international journals, and served as the Chair and Co-Chair for 12 international conferences. For recognition of my research activities, I have been invited to a number of international conferences as Invited Speaker, chaired panel discussions and numerous international conference sessions. I have served on more than 150 international conference program committees. Furthermore, I have published number of articles in peerreviewed international journals and conferences. I am also an active member of ACM, ASEE, ASEE/PSW and CSAB.

FIE '98. 28th Annual Frontiers in Education Conference. Moving from 'Teacher-Centered' to 'Learner-Centered' Education. Conference Proceedings (Cat. No.98CH36214), 1998

Abstract Many creative and effective teaching strategies are forgotten or misplaced between semes... more Abstract Many creative and effective teaching strategies are forgotten or misplaced between semesters, only to be learned anew in subsequent semesters or lost forever. Beginning in September 1997, the University of Wisconsin-Madison College of Engineering linked its ...