Brian F. G. Johnson
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View article: Multivariate statistical analysis of hydrogeochemical data to identify and delineate primary influences on groundwater chemistry
Multivariate statistical analysis of hydrogeochemical data to identify and delineate primary influences on groundwater chemistry Open
This study uses multivariate statistical analyses to identify and delineate mine-influenced groundwater from other types of groundwater near a former copper mine in Yerington, NV, USA. This statistical approach was used because some analyt…
View article: The MSUM Native American student needs survey: Highlighting Indigenous student voices in academia
The MSUM Native American student needs survey: Highlighting Indigenous student voices in academia Open
After examination of the Equity Score card for Minnesota State University Moorhead (MSUM) in the Fall of 2023, it was determined that the largest equity gap is among Native American students (which was also representative of the data for t…
View article: Poster 275: Predictors of Surgical Outcome in Patients Undergoing Meniscectomy
Poster 275: Predictors of Surgical Outcome in Patients Undergoing Meniscectomy Open
Objectives: The benefits and outcomes of meniscectomy surgery is a controversial topic among orthopedic surgeons. Though previous studies have sought to address the controversy, there are few that have identified predictors of postoperativ…
View article: Abstract 1886 Breaking Barriers: Assessing Learning Gains of Female and Hispanic Participants in a Sustainability-Centered Internship Program
Abstract 1886 Breaking Barriers: Assessing Learning Gains of Female and Hispanic Participants in a Sustainability-Centered Internship Program Open
Previous research has shown that female and Hispanic students who are underrepresented in STEM face more educational barriers than their non-Hispanic, male peers. However, little research has been conducted on the effects of intersectional…
View article: Defining the Extent of Mine-Influenced Groundwater in a Mineralized and Agricultural Area Using Multiple Lines of Evidence
Defining the Extent of Mine-Influenced Groundwater in a Mineralized and Agricultural Area Using Multiple Lines of Evidence Open
Mine-influenced groundwater (MIW) at a former copper mine site has affected an alluvial aquifer that also contains groundwater with solutes characteristic of natural mineralization and agricultural activities. Many of the solutes are commo…
View article: Evaporative chilling systems and methods using a selective transfer membrane
Evaporative chilling systems and methods using a selective transfer membrane Open
Compact membrane evaporative chillers, methods for cooling a process fluid (e.g., air) using a compact membrane evaporative chiller, and air conditioning systems and methods that include a compact membrane evaporative chiller are disclosed…
View article: A Lyapunov-Based Generalized Dc-Side Controller Design for PV-Connected Systems: Preprint
A Lyapunov-Based Generalized Dc-Side Controller Design for PV-Connected Systems: Preprint Open
The objective of this paper is to realize a universal dc-side controller for photovoltaic (PV) systems where the control is agnostic to the downstream converter configuration. To achieve this, the downstream power converter and its control…
View article: New Approaches to Shifting the Migraine Treatment Paradigm
New Approaches to Shifting the Migraine Treatment Paradigm Open
The standard of care paradigm for migraine treatment has been based almost exclusively on approaches that grew out of the happenstance use of market pharmaceuticals. Only methysergide, which has long since been removed from use for safety …
View article: Motor memory reactivation: Brief practice makes perfect
Motor memory reactivation: Brief practice makes perfect Open
Motor skills are practiced to retain and transfer to task variations and different environments. Here we report that, contrary to the adage that more practice is better, long-term reactivation of a motor memory with as little as one trial …
View article: Grid-Connected Self-Synchronous Cascaded H-Bridge Inverters with Autonomous Power Sharing: Preprint
Grid-Connected Self-Synchronous Cascaded H-Bridge Inverters with Autonomous Power Sharing: Preprint Open
Cascaded inverters are widely applied in applications where elevated ac voltages are required while using semiconductor devices with lower voltage ratings. Here, we focus on structures that require localized power transfer between low-volt…
View article: Impact of Increased Inverter Penetration on Power System Small-Signal Stability: Preprint
Impact of Increased Inverter Penetration on Power System Small-Signal Stability: Preprint Open
The transformation of the power system to include more distributed energy resources (DER) implies an increase in the number of inverter-based resources deployed on the grid. Envisioning future scenarios, this paper presents a small-signal …
View article: Model Reduction for Inverters with Current Limiting and Dispatchable\n Virtual Oscillator Control
Model Reduction for Inverters with Current Limiting and Dispatchable\n Virtual Oscillator Control Open
This paper outlines reduced-order models for grid-forming\nvirtual-oscillator-controlled inverters with nested current- and\nvoltage-control loops, and current-limiting action for over-current protection.\nWhile a variety of model-reductio…
View article: A2B: A Toolkit for Computing Circulation Metrics in Buildings
A2B: A Toolkit for Computing Circulation Metrics in Buildings Open
One challenging consideration in architectural design is the movement, or circulation, of building occupants. Poor circulation design can lead to daily frustration—and hazardous conditions in emergencies, while good circulation design can …
View article: Perioperative, Postoperative, and Long-Term Outcomes Following Open Surgical Repair of Ruptured Abdominal Aortic Aneurysm
Perioperative, Postoperative, and Long-Term Outcomes Following Open Surgical Repair of Ruptured Abdominal Aortic Aneurysm Open
We investigated factors that affected perioperative, postoperative, and long-term outcomes of patients who underwent open emergency surgical repair of ruptured abdominal aortic aneurysms (RAAA). All patients who underwent open emergency su…
View article: Norman Neill Greenwood. 19 January 1925—14 November 2012
Norman Neill Greenwood. 19 January 1925—14 November 2012 Open
Norman Neill Greenwood was a member of the group of distinguished post-Second World War inorganic chemists who created modern inorganic chemistry. He was particularly recognized for his contributions to the chemistry of the main group elem…
View article: A Fuzzy-Logic Subsumption Controller for Home Energy Management Systems
A Fuzzy-Logic Subsumption Controller for Home Energy Management Systems Open
Presentation for NAPS 2015 associated with conference publication CP-64392. Home Energy Management Systems (HEMS) are controllers that manage and coordinate the generation, storage, and loads in a home. These controllers are increasingly n…
View article: Temperature Threshold and Water Role in CVD Growth of Single-Walled Carbon Nanotubes
Temperature Threshold and Water Role in CVD Growth of Single-Walled Carbon Nanotubes Open
An in-depth understanding of the growth process of single walled carbon nanotubes is of vital importance to the control of the yield of the material and its carbon structure. Using a nickel/silica (Ni/SiOx) catalyst we have conducted a ser…
View article: 23. Eugenics in the Canadian Context: The 1928 Sterilization Act
23. Eugenics in the Canadian Context: The 1928 Sterilization Act Open
The following posters are a result of research done by the students in Dr. Cynthia Levine-Rasky’s Sociology 233: ‘Race’ and Racialization course.