A5047597205- Geophysical Methods and Applications
- Geophysical and Geoelectrical Methods
- Seismic Waves and Analysis
- Engineering Education and Curriculum Development
- Karst Systems and Hydrogeology
- Grouting, Rheology, and Soil Mechanics
- Engineering Education and Pedagogy
- Problem and Project Based Learning
- Biomedical and Engineering Education
- Microbial Applications in Construction Materials
- Geotechnical Engineering and Analysis
- Seismic Imaging and Inversion Techniques
- Geotechnical Engineering and Soil Mechanics
- COVID-19 epidemiological studies
- COVID-19 and Mental Health
- Interdisciplinary Research and Collaboration
- Geotechnical Engineering and Underground Structures
- Educational Assessment and Pedagogy
- Clinical Laboratory Practices and Quality Control
- Geoscience and Mining Technology
- 3D Surveying and Cultural Heritage
- Pesticide and Herbicide Environmental Studies
- Radioactivity and Radon Measurements
- Environmental Justice and Health Disparities
- Bacterial biofilms and quorum sensing
Lafayette College
2006-2022
UNSW Sydney
2021-2022
Cornell University
2020
Engineering (Italy)
2020
Liberal Arts University
2020
Easton Hospital
2016
Temple University
2007
Mississippi State University
2007
University Hospital of Geneva
1978
COVID-19 has had a profound influence on the conduct of teaching and learning in higher education. Almost everywhere sudden shift occurred as educators transitioned courses from mainly face-to-face to emergency remote instruction, mostly conducted online. While details varied for individual faculty members, institutions, countries, all confronted new challenges. We examine immediate effects Our results are based sample 309 courses, academic staff who taught them, at eight colleges...
How did the onset of COVID-19 pandemic impact student learning in higher education? Everywhere, Sars-CoV-2 struck hardest most disadvantaged communities. This paper asks whether virus's disproportionate effect on more vulnerable groups is replicated among college and university students. Data come from approximately 3800 students studying at nine education institutions located six different countries around globe. Conventional imagery ‘Ivory Tower’ treats colleges universities as cloistered...
Abstract A major challenge in groundwater and petroleum modeling is how to represent the diagenesis effect sensu lato its associated features (e.g., karst cavities, porosity permeability characteristics). Both geometrical descriptions genesis are necessary for diagenetic features, because they allow restitution of phenomenon subsurface settings where cannot be fully observed. This study focuses on flank-margin caves developed carbonate islands (as case Bahamian islands). Over last twenty...
We report the results of a field comparison 2D resistivity data collected using both traditional dipole-dipole array and new computer-optimized recently described in literature. The study was conducted at karst site eastern Pennsylvania. Computer simulations suggested that for given line length, optimal would be equally effective imaging shallow targets but provide better resolution depth. Our test showed two arrays imaged bedrock topography well. When full grid lines were combined analyzed...
For convenience in the field, multielectrode arrays used to collect 3D resistivity data are typically laid out a Cartesian grid with potential measurements made using electrode pairs oriented X and Y axis directions. The current flow away from given injection electrode, however, has radial symmetry case of homogeneous, isotropic half‐space, near‐radial otherwise, unless ground is extremely heterogeneous or anisotropic. Consequently, many voltage standard combinations tangential...
Based on previously developed evaluation criteria, a serviceability limit state is established for reliability analysis of building damage caused by excavation. The term defined herein as the violation requirements such exceeding threshold principal strain in building. In this paper model uncertainty or bias, characterised applying Bayesian mapping and techniques, its relationship to prior knowledge potential (probability) are analysed. concept apparent bias factor introduced, an iterative...
To test whether the addition of Flavobacterium johnsoniae could increase strength saturated Ottawa 30 sand.A box model was built that simulates groundwater-like flow through a main sand compartment. Strength tests were performed at seven locations and two depths, 10.8 20.3 cm below top tank, using vane shear device before after bacteria. After Fl. johnsoniae, samples obtained from multiple sampling ports on vertical sides model. The presence bacterial biofilm confirmed by staining these with...
Abstract NOTE: The first page of text has been automatically extracted and included below in lieu an abstract Undergraduate Research: Lafayette Experience Kristen L. Sanford Bernhardt, Mary J.S. Roth College Introduction is undergraduate institution with approximately 2200 students. On average, 80 those students are civil engineering majors; the Department Civil Environmental Engineering graduates anywhere from 12-25 per class. opportunity for to conduct one-on-one research a faculty member...
In this paper, the authors compare microgravity, multi-electrode resistivity, and boring data in<br>karst at a site in eastern Pennsylvania. The hypothesis being tested is that comparison of<br>resistivity results gravity (both non-intrusive tests) can be used to provide information<br>concerning location of voids where depth bedrock highly variable. The<br>authors conclude while either resistivity or predict depths,<br>fluctuations observed areas without are...
Abstract Using Concept Maps to Assess Student Learning in a Multi-Section Introduction Engineering Course This Evidence-based Practice paper will describe the use of simple concept map assignment create foundation for productive faculty conversations across multiple engineering disciplines regarding student learning and pedagogical approaches required introduction course. The authors are part team professors who teach sections an course that is all first-year students at their institution....
Abstract The authors, professors in civil engineering, teach multiple sections of an introduction to engineering course. course has general student learning outcomes that apply areas (e.g., mechanical chemical etc.) were developed by consensus the departments at institution. In addition these outcomes, discipline-specific are incorporated into individual These faculty member teaching section and related his/her disciplinary expertise. serve as foundation for work presented this paper have...
Void detection is challenging due to the complexity of near-surface materials and limited resolution geophysical methods. Although multichannel, high-frequency, surfacewave<br>techniques can provide reliable S-wave velocities in different geological settings, they are not suitable for detecting voids directly based on anomalies velocity because of<br>limitations profiles inverted from surface-wave phase velocities. Therefore, we studied feasibility with...
An ongoing research program at Metzgar Fields, an athletic facility Lafayette College in<br>Easton, Pennsylvania, has the primary objective of improving site investigation methods for karst<br>features using geophysical methods. Multi-electrode resistivity testing completed in 1999 located a<br>significant anomaly test and subsequent borehole drilling confirmed that a two-meter high<br>void existed below approximately seven meters bedrock. During summer 2003, we...
Abstract NOTE: The first page of text has been automatically extracted and included below in lieu an abstract Main Menu Engineering Ethics: Teaching Moral Theories to Engineers Kristen L. Sanford Bernhardt, Mary J.S. Roth, David Brandes, Arthur D. Kney Department Civil & Environmental Engineering, Lafayette College Introduction Accreditation Board for Technology (ABET) long required that engineering programs address professional issues, including ethics, their curricula. While have...
Abstract While there are many references available to faculty that provide ideas and research related teaching introductory geotechnical engineering courses, the author has found no reference addresses a project-based introduction is suitable for first-year course. As part of required course at Lafayette College, developed taught multiple offerings seven-week provides low-cost framework students achieve student learning outcomes directly associated with in addition general all sections The...
Sinkhole formation in many areas of the northeast United States occurs clay soils over<br>relatively shallow (<lOm), fractured, carbonate bedrock. In these areas, traditional intrusive<br>methods site investigation have a low probability encountering subsurface karst features<br>that are associated with future sinkhole formation. Non-intrusive methods such as ground<br>penetrating radar and electromagnetic only limited applicability, there are<br>difficulties...
We are involved in a multi‐year study to evaluate electrical resistivity as tool characterize shallow karst. As part of this study, we have conducted 56‐line multielectrode survey ( grid tests) and 12‐line azimuthal on site with known cave other karst features. (The is located at the approximate center tests.) In inversion results for these lines, air‐filled appears be high feature when tests run perpendicular geologic strike low parallel strike. used data from borings taken an understanding...
Growing biofilm in saturated sand has been shown to reduce the permeability of soil by one or more orders magnitude and may be a viable approach reducing seepage field; however, obtaining laboratory results samples where is being developed difficult. Adding nutrients formation but also piping other areas testing apparatus. In addition, some bacteria produce gas as product metabolism this can collect apparatus interfere with fluid flow. This paper presents an that effectively minimized growth...