Meet Charles Wasson

Wasson, Charles S.

doi:10.1002/inst.201215126

Cited by 6 publications

(8 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…,Choi et al (1995),Wasson et al (1998),Benedix et al (2000),Birch et al (2001),Wasson and Richardson (2001),Wasson and Kallemeyen (2002), Petaev and Jacobsen (2004), Russell et al (2004), van Niekerk et al (2007), Wasson et al (2007), Walker et al (2008), D'Orazio et al (2011), Buchner et al (2012), Fazio et al (2013).…”

mentioning

confidence: 99%

Chemical Analysis of Iron Meteorites Using a Hand‐Held X‐Ray Fluorescence Spectrometer

Gemelli

D’Orazio

Folco

2014

Geostandard Geoanalytic Res

View full text Add to dashboard Cite

We evaluate the performance of a hand‐held XRF (HHXRF) spectrometer for the bulk analysis of iron meteorites. Analytical precision and accuracy were tested on metal alloy certified reference materials and iron meteorites of known chemical composition. With minimal sample preparation (i.e., flat or roughly polished surfaces) HHXRF allowed the precise and accurate determination of most elements heavier than Mg, with concentrations > 0.01% m/m in metal alloy CRMs, and of major elements Fe and Ni and minor elements Co, P and S (generally ranging from 0.1 to 1% m/m) in iron meteorites. In addition, multiple HHXRF spot analyses could be used to determine the bulk chemical composition of iron meteorites, which are often characterised by sulfide and phosphide accessory minerals. In particular, it was possible to estimate the P and S bulk contents, which are of critical importance for the petrogenesis and evolution of Fe‐Ni‐rich liquids and iron meteorites. This study thus validates HHXRF as a valuable tool for use in meteoritics, allowing the rapid, non‐destructive (a) identification of the extraterrestrial origin of metallic objects (i.e., archaeological artefacts); (b) preliminary chemical classification of iron meteorites; (c) identification of mislabelled/unlabelled specimens in museums and private collections and (d) bulk analysis of iron meteorites.

show abstract

mentioning

confidence: 99%

Chemical Analysis of Iron Meteorites Using a Hand‐Held X‐Ray Fluorescence Spectrometer

Gemelli

D’Orazio

Folco

2014

Geostandard Geoanalytic Res

View full text Add to dashboard Cite

show abstract

“…Figure 4 shows the relative deviation of selected elements in the glasses that were fused at different times (1, 2, 4, 8, 12 and 25 h). Elements are arranged according to their volatility based on the condensation temperatures at a pressure of 10 -4 bar ( Wasson 1985). The data illustrate that volatile elements Sn and Pb were depleted with increased fusion time by up to 70% after 25 h of melting.…”

Section: Influence Of Wet Milling Timementioning

confidence: 99%

Comparison of Ultrafine Powder Pellet and Flux‐free Fusion Glass for Bulk Analysis of Granitoids by Laser Ablation‐Inductively Coupled Plasma‐Mass Spectrometry

Karius²,

Schmidt³

et al. 2018

Geostandard Geoanalytic Res

View full text Add to dashboard Cite

Two sample preparation techniques (ultrafine powder pellet and flux‐free fusion glass) for LA‐ICP‐MS bulk analysis of granitoids were compared. Ultrafine powder particles produced by wet milling were characterised as d50: ~ 1.0 μm, d90: ~ 5.0 μm. Agate abrasion (balls and vial) during wet milling affects only SiO2 measurements and is negligible for other elements. For the flux‐free fusion glass, a second grinding of the initial fused glass and re‐melting were necessary to produce compositionally homogeneous glasses. Nickel and Cu can be contaminated during the fusion procedure, and Sn and Pb were depleted after the melting process. The homogeneity of fusion glasses was comparable to that of MPI‐DING glasses, while the powder pellets were less homogeneous. This heterogeneity is ascribed to large (up to 10 μm) crystal fragments (e.g., biotite) persisting in powders even after 45 min of milling. For most elements of interest, both preparation techniques give reliable LA‐ICP‐MS results of granitoid reference materials within 10% of the reference values. Thus, we can recommend both techniques to avoid common problems associated with acid dissolution ICP‐MS. For high‐precision measurements (especially Zr, Hf, Th and U), the flux‐free fusion glass technique is a better choice than ultrafine powder pellets.

show abstract

“…Our paper contributes to the existing literature on university-industry collaboration in that there are few studies of culture change in either the industry or academic partners as a result of such engagements. Furthermore, there seem to be few prior studies of student projects for industry, even though these are quite common; most studies focus on faculty interactions with industry (Freitas et al 2013;Perkmann et al 2013;Wasson and Metcalf 2013).…”

Section: Conclusion: a Model For Successful Industry-university Collamentioning

confidence: 99%

“…The department explicitly subscribes to the view that theory and practice are closely intertwined and this interdependence shapes the design of the master's program. In the design anthropology course, Wasson combines aspects of a traditional class with features of a consulting project (Wasson and Metcalf 2013). It is like a conventional class in that students read and discuss relevant literature; they receive grades from the professor; and the timeframe parallels the official semester.…”

Section: Introducing the Class: University Of North Texas As An Exampmentioning

confidence: 99%

Autonomous Vehicle Study Builds Bridges between Industry and Academia

Jordan

Wasson

2015

Ethnographic Praxis

View full text Add to dashboard Cite

Researchers have long explored the desirability and benefits of industry‐university collaborations and acknowledge they can be fraught with difficulties. We examine one such alliance, focused on driverless cars, a current hot topic in the public imagination and in technology design. Our collaboration began as an alliance between two anthropologists, one a professor at the University of North Texas, the other a consultant with the Nissan Research Center in Sunnyvale, California. We designed a research project for a design anthropology course that Christina Wasson taught in Fall 2014. Brigitte Jordan, at the time, was conducting an informal ethnography class for engineers and computer scientists at NRC. Our alliance had two objectives: to determine what a successful industry‐university collaboration could look like when it involves ethnographic research in the high‐tech sector, and to provide insights into usable ethnographic methods and data that would support social and cultural questions in autonomous vehicle (AV) research at the Nissan center. We found these two geographically separated classes eventually allowed building bridges across academia and industry, anthropology and engineering, leading in the long run to some softening of the boundaries between the two disciplines. Here we discuss significant variance in the research cultures of class participants at UNT and NRC (ethnographers and automotive engineers), and the various manners in which these differences were bridged over the course of the project (or not, as the case may be). We explore factors which inhibit or encourage exchange between university and industry micro‐cultures, consider reasons for the success or failure of such projects, and offer suggestions for improving future collaborations. We end with ideas about what a model for productive industry‐academia collaboration could look like.

show abstract

Meet Charles Wasson

Cited by 6 publications

References 0 publications

Chemical Analysis of Iron Meteorites Using a Hand‐Held X‐Ray Fluorescence Spectrometer

Chemical Analysis of Iron Meteorites Using a Hand‐Held X‐Ray Fluorescence Spectrometer

Comparison of Ultrafine Powder Pellet and Flux‐free Fusion Glass for Bulk Analysis of Granitoids by Laser Ablation‐Inductively Coupled Plasma‐Mass Spectrometry

Autonomous Vehicle Study Builds Bridges between Industry and Academia

Contact Info

Product

Resources

About