Expert Details

Expert in Electromagnetic Interference, Electronic Noise, Shielding, Electromagnetism and Applied Physics

Expert ID: 715001 Minnesota, USA

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Expert has applied his background in physics and electronics to the areas of electromagnetic interference, noise, and equipment compatibility, with particular specialization in low-frequency situations, both conducted and via fields. He has diagnosed and analyzed problems with cathode ray tube displays, analog communications, magnetic media storage, control systems, and transportation systems. He has calculated and modeled the strengths of electric and magnetic fields due to a variety of sources, including utility lines, electrical devices, and lightning strikes. He is knowledgeable of the broad range of mitigation techniques, including shielding, filtering, and grounding. He has consulted for clients in the manufacturing, electrical utility, railroad, and pipeline industries, as well as for institutions and residences.

Expert is knowledgeable of the mechanisms of electromagnetic shielding and the applications of shielding materials to reduce both the emission of radiated electromagnetic fields and the susceptibility of shielded equipment. He has carried out research into the shielding characteristics of commercial building materials, such as rigid steel conduit, against low-frequency magnetic fields. Expert can provide advice on electromagnetic interference tests, magnetostatics, magnetic field measurements, gaussmeters, and sources of electronic noise. He regularly taught undergraduate courses on electromagnetism, electromagnetic theory, and analog and digital electronics (including laboratories). Being knowledgeable of both theory and practice, he has developed numerous demonstrations of electromagnetic principles using common materials and devices. He welcomes all questions on electronics, electric circuits, electric and magnetic fields, and magnetic flux.

Experienced with characterizing and measuring the properties of magnetic materials, expert has measured magnetic susceptibility, permeability, hysteresis, and magnetization. He has worked with metallic elements, rare-earth alloys, and soft and hard magnetic materials. His doctoral thesis was a study of the preparation and measurement of magnetic susceptibility of alloys of samarium, phosphorous, and sulphur. The applications of magnetic materials that he studied in recent years include visualization, non-destructive testing, magnetic recording media, and magnetic shielding, tools, and transformers. He has served as a consulting research physicist for a major international manufacturer of diverse magnetic materials and products.

Expert is knowledgeable of the physics, engineering, and algorithms employed in gravity retarder yards (GRS, Wabco, US&S) used for freight car classification. He has conducted two studies of car speed control software and hardware at major US classification yards. He has written the definitive tutorial article and encyclopedia chapter on the fundamentals of such installations. He is knowledgeable of railroad operations, railroad technology, and the history of the industry.

Consultant was engaged for five years by major manufacturer of high-performance materials to characterize proprietary magnetic materials and processes, develop new products and explore marketing opportunities. He has two Records of Invention with this company for applications of these materials.Consultant carried out study for Minnesota Public Radio on the potential for electromagnetic interference at MPR headquarters in St. Paul, Minnesota due to planned operation of Central Corridor Light Rail Project.Consultant was engaged by a major U.S. railroad to troubleshoot. document and solve car speed control problems at two computer-controlled gravity classification yards.Consultant was engaged by architectural engineering firm to predict and evaluate the potential for lighting-induced erasure of digital magnetic media by currents flowing in the lighting protection system for a proposed warehouse for major microchip manufacturer.Consultant was engaged as sub-contractor in four major inductive coordination studies among railroads, electric utilities, and pipelines to evaluate and mitigate undesired interference and assure operational safety under normal and fault conditions.

Expert may consult nationally and internationally, and is also local to the following cities: Minneapolis, Minnesota - Saint Paul, Minnesota - Rochester, Minnesota - Burnsville, Minnesota - Saint Cloud, Minnesota - Eden Prairie, Minnesota - Minnetonka, Minnesota

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Year Degree Subject Institution
Year: 1978 Degree: Ph.D. Subject: Experimental Solid State Physics Institution: University of Iowa
Year: 1970 Degree: M.S. Subject: Physics Institution: Purdue University
Year: 1967 Degree: A.B. Subject: Physics Institution: Wabash College

Work History

Years Employer Title Department Responsibilities
Years: 1979 to 2009 Employer: Gustavus Adolphus College Title: Professor Emeritus Department: Physics Responsibilities: Expert was responsible for teaching and developing the full range of undergraduate physics courses and laboratories. He carried out research with students in electromagnetic interference and magnetic measurements. He was the department chair for 14 years and pre-engineering advisor for 20 years. He gave numerous presentations at professional meetings and wrote and reviewed articles for professional journals and publishers. He has over 35 years of consulting experience in high-tech industries, railways, and assisting clients in research, development, troubleshooting and manufacturing.
Years: 1985 to 1989 Employer: SRI International Title: Senior Research Physicist Department: Transportation and Systems Control Program Responsibilities: He served as research physicist in 1985-86 during his first sabbatical leave and continued as adjunct staff through 1989 working on various simulation and modeling programs for electric rail transit systems such as BART and PATH. Group Manager was Dr. Bjorn Conrad.
Years: 1976 to 1979 Employer: University of Iowa Title: Graduate Teaching and Research Assistant and Instructor Department: Physics and Astronomy Responsibilities: He was a laboratory instructor in electronics courses and research assistant as well as a Space Physics Engineer II on ground support equipment to be used with the Gemini Project.
Years: 1970 to 1976 Employer: Island Community College Title: Instructor of Physics and Mathematics Department: Natural Science Division Responsibilities: He taught physics, mathematics, and computer programming courses and laboratories and also maintained the Division's electrical and electronic equipment.
Years: 1967 to 1968 Employer: 3M Company Title: Summer Technical Program Department: Corporate Research Responsibilities: He performed computer modeling of thermal analysis in thermoelectric generators (1967); and computer modeling of solid state lasers (1968).
Years: 1966 to 1966 Employer: Northern Pacific Railway Title: Junior Circuit Designer Department: Signal Department Responsibilities: This was a summer position on special electronic projects in railway signaling, primarily CTC systems. Reported to Signal Engineer A.J. Hendry.
Years: 1964 to 1964 Employer: Hoosier Crown Corporation Title: Electronics Technician and Instructor Department: Responsibilities: He was hired to diagnose and repair electronic counters used in manufacturing during the daytime and to teach an evening electronics course to plant technicians and engineers during the summer of 1964 (at age 18).
Years: 1961 to 1964 Employer: Self Employed Title: Electronics Technician Department: All Responsibilities: He repaired and installed scientific and audio-visual electronic equipment for nearly all the academic and support departments.

Career Accomplishments

Associations / Societies
Expert is a Senior Member of the IEEE, EMC Society of IEEE, American Association of Physics Teachers, Sigma Xi, Sigma Pi Sigma, the Lexington Group in Transportation History, Pavek Museum of Broadcasting and numerous railroad historical and technical societies..
Licenses / Certifications
Technician Class Amateur Radio License N0YVX
Professional Appointments
He was the Associate Editor of American Journal of Physics; President, Minnesota AAPT; and served on numerous National Science Foundation review panels.
Awards / Recognition
Expert has been awarded several research and department grants.

Publications and Patents Summary
He has over two dozen articles and books in physics research and teaching, railroad history and technology, and a similar number of presentations at national meetings.

Additional Experience

Expert Witness Experience
Expert has performed background studies related to civil litigation and has written expert reports submitted to the court on behalf of clients. He has carried out numerous patent and intellectual property studies on behalf of clients in his areas of primary and secondary expertise. He has not been deposed or appeared in court and will not consider serving in this capacity.
Training / Seminars
Expert was a college professor for 36 years and developed numerous courses, modules, laboratories and seminars. Expert has conducted seminars and sessions at national engineering and scientific conferences and trade shows in areas multiple areas.
Vendor Selection
Expert has experience locating vendors of laboratory and test equipment, EMC test and measurement equipment, physics teaching equipment and model railroad products. Expert maintains his own electronics shop and purchases parts and components.

Marketing Experience
Expert developed and marketed a unique line of model railroad kits beginning in 1978 that quickly became a small business that continues to this day, Over 175 products have been developed, of which over 125 are still in production and cataloged. This includes historical railroad video tapes and DVDs. Total retail value of products sold since inception exceeds $700,000. Products are distributed through the leading US model railroad distributor and are sold in hobby shops and online. Special orders and commissions now dominate the creation of new products.
Other Relevant Experience
Expert is quickly able to see connections across the physical sciences, engineering and mathematics and is a natural explainer and troubleshooter. Expert writes well and can assist others as editor and advisor in their writing.

Language Skills

Language Proficiency
German He has S-2 proficiency in speaking, understanding and writing German and S-3 professional proficiency in reading German.
Latin He has retained an elementary reading knowledge of Latin.

Fields of Expertise

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