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Articles 1 - 8 of 8
Full-Text Articles in Engineering
Teaching Security Defense Through Web-Based Hacking At The Undergraduate Level, Brent Wilson
Teaching Security Defense Through Web-Based Hacking At The Undergraduate Level, Brent Wilson
Faculty Publications - Department of Electrical Engineering and Computer Science
The attack surface for hackers and attackers is growing every day. Future cybersecurity professionals must have the knowledge and the skills to defend against these cyber attacks. Learning defensive techniques and tools can help defend against today’s attacks but what about tomorrow's? As the types of attacks change so must the cybersecurity professional. The only way for the cybersecurity professional to achieve this nimbleness is to understand the structural anatomy of the various attack types. Understanding the threat environment is the key to future success. Security defense through offensive techniques should and can be taught at the undergraduate level. Using …
Revealing Casual Pathways To Sustainable Water Service Delivering Using Fsqca, Kate E. Gasparro, Jeffrey P. Walters
Revealing Casual Pathways To Sustainable Water Service Delivering Using Fsqca, Kate E. Gasparro, Jeffrey P. Walters
Faculty Publications - Biomedical, Mechanical, and Civil Engineering
This study aimed to build on theory and practice regarding the combinations of conditions that influence water service sustainability when external partners are involved. The study investigates 26 well projects that have been implemented in developing countries with the assistance of Engineers Without Borders-USA (EWB-USA). Using past literature on sustainable water service delivery in developing communities, emergent coding techniques with project documents, and surveys with EWB-USA team members, this study identifies a set of project conditions to conduct fuzzy-set Qualitative Comparative Analysis (fsQCA). Findings show that the presence of a water committee cannot alone account for project sustainability. Additional conditions, …
Estimation Of Localized Ideal Oximetry Sensor Lag Via Oxygen Desaturation-Disordered Breathing Event Cross-Correlation, Brian Snider, A Kain
Estimation Of Localized Ideal Oximetry Sensor Lag Via Oxygen Desaturation-Disordered Breathing Event Cross-Correlation, Brian Snider, A Kain
Faculty Publications - Department of Electrical Engineering and Computer Science
In previous work, we attempted to identify events using sensor data from full-night polysomnography studies using a global 20-second oximetry sensor lag across all studies. However, we observed that oxygen desaturation onset trailed the corresponding human expert-labeled events by varying amounts of time, even within the same study. In this work, we estimate the localized ideal oximetry (SpO2) sensor lag using the cross-correlation between the labeled disordered breathing event and the observed desaturation.
Human Liver Sinusoid On A Chip For Hepatitis B Virus Replication Study, Young Bok (Abraham) Kang, Siddhartha Rawat, Nicholas Duchemin, Michael Bouchard, Moses Noh
Human Liver Sinusoid On A Chip For Hepatitis B Virus Replication Study, Young Bok (Abraham) Kang, Siddhartha Rawat, Nicholas Duchemin, Michael Bouchard, Moses Noh
Faculty Publications - Biomedical, Mechanical, and Civil Engineering
We have developed a miniature human liver (liver-sinusoid-on-a-chip) model using a dual microchannel separated by a porous membrane. Primary human hepatocytes and immortalized bovine aortic endothelial cells were co-cultured on opposite sides of a microporous membrane in a dual microchannel with continuous perfusion. Primary human hepatocytes in this system retained their polygonal morphology for up to 26 days, while hepatocytes cultured in the absence of bovine aortic endothelial cells lost their morphology within a week. In order to demonstrate the utility of our human-liver-sinusoid-on-a-chip, human hepatocytes in this system were directly infected by Hepatitis B Virus (HBV). Expression of the …
Embedding Systems Thinking Into Ewb Project Planning And Development: Assessing The Utility Of A Group Model Building Approach, Kimberly Pugel, Jeffrey P. Walters
Embedding Systems Thinking Into Ewb Project Planning And Development: Assessing The Utility Of A Group Model Building Approach, Kimberly Pugel, Jeffrey P. Walters
Faculty Publications - Biomedical, Mechanical, and Civil Engineering
Amongst growing sociotechnical efforts, engineering students and professionals both in the international development sector and industry are challenged to approach projects more holistically to achieve project goals. Engineering service learning organisations must similarly adapt their technological projects to consider varying cultural and economic structures, ensuring more resilient social progress within development efforts. In practice, systems thinking approaches can be utilised to model the social, economic, political, and technological implications that influence the sustainability of an engineering project. This research assesses the utility of integrating systems thinking into Engineers Without Borders (EWB) project planning and development, thereby improving project impact and …
Utilizing Ground-Based Lidar Measurements To Aid Autonomous Airdrop Systems, Martin Cacan, Edward Scheuermann, Michael Ward, Mark Costello, Nathan Slegers
Utilizing Ground-Based Lidar Measurements To Aid Autonomous Airdrop Systems, Martin Cacan, Edward Scheuermann, Michael Ward, Mark Costello, Nathan Slegers
Faculty Publications - Biomedical, Mechanical, and Civil Engineering
Uncertainty in atmospheric winds represents one of the primary sources of landing error in airdrop systems. In this work, a ground-based LIDAR system samples the wind field at discrete points above the target and transmits real-time data to approaching autonomous airdrop systems. In simulation and experimentation, the inclusion of a light detection and ranging (LIDAR) system showed a maximum of 40% improvement over unaided autonomous airdrop systems. Wind information nearest ground level has the largest impact on improving accuracy.
Working With Complexity: A Participatory Systems-Based Process For Planning And Evaluating Rural Water, Sanitation And Hygiene Services, Jeffrey P. Walters, Kate Neely, Karla Pozo
Working With Complexity: A Participatory Systems-Based Process For Planning And Evaluating Rural Water, Sanitation And Hygiene Services, Jeffrey P. Walters, Kate Neely, Karla Pozo
Faculty Publications - Biomedical, Mechanical, and Civil Engineering
Individuals working within the water, sanitation and hygiene for development (WASH) sector grapple daily with complex technical, social, economic, and environmental issues that often produce unexpected outcomes that are difficult to plan for and resolve. Here we propose a method we are calling the ‘Participatory Systems-based Planning and Evaluation Process’ (PS-PEP) that combines structural factor analysis and collaborative modeling to guide teams of practitioners, researchers, and other stakeholders through a process of modeling and interpreting how factors systemically and dynamically influence sustained access to WASH services. The use and utility of the PS-PEP is demonstrated with a regional team of …
Beneficial Aerodynamic Effect Of Wing Scales On The Climbing Flight Of Butterflies, Nathan Slegers, Michael Heilman, Jacob Cranford, Amy Lang, John Yoder, Maria Laura Habegger
Beneficial Aerodynamic Effect Of Wing Scales On The Climbing Flight Of Butterflies, Nathan Slegers, Michael Heilman, Jacob Cranford, Amy Lang, John Yoder, Maria Laura Habegger
Faculty Publications - Biomedical, Mechanical, and Civil Engineering
It is hypothesized that butterfly wing scale geometry and surface patterning may function to improve aerodynamic efficiency. In order to investigate this hypothesis, a method to measure butterfly flapping kinematics optically over long uninhibited flapping sequences was developed. Statistical results for the climbing flight flapping kinematics of 11 butterflies, based on a total of 236 individual flights, both with and without their wing scales, are presented. Results show, that for each of the 11 butterflies, the mean climbing efficiency decreased after scales were removed. Data was reduced to a single set of differences of climbing efficiency using are paired t …