Reconceptualising Personas Across Cultures: Archetypes, Stereotypes & Collective Personas in Pastoral Namibia

The paucity of projects where persona is the research foci and a lack of consensus on this artefact keep many reticent about its purpose and value. Besides crafting personas is expected to differ across cultures, which contrasts the advancements in Western theory with studies and progress in other sites. We postulate User-Created Personas reveal specific characteristics of situated contexts by allowing laypeople to design persona artefacts in their own terms. Hence analysing four persona sessions with an ethnic group in pastoral Namibia –ovaHerero– brought up a set of fundamental questions around the persona artefact regarding stereotypes, archetypes, and collective persona representations: (1) to what extent user depictions are stereotypical or archetypal? If stereotypes prime (2) to what degree are current personas a useful method to represent end-users in technology design? And, (3) how can we ultimately read accounts not conforming to mainstream individual persona descriptions but to collectives

Effect of Gamma Radiation on Selective Laser Sintered Nylon-12

Repository for manuscript detailing effect of gamma irradiation on selective laser sintered and injection molded nylon-1

An Experimental and Rate Theory Model for Understanding the Radiation Effects in Friction Stir Welded MA956 Ion Irradiation

One outstanding challenge in the manufacturing and joining of oxide dispersion strengthened steels is retaining the nanofeatures in the alloy throughout the fabrication and welding process. MA956 was friction stir welded with two different sets of welding parameters, resulting in a medium and high heat input. After welding, 5 MeV Fe++ ion irradiations were performed at doses ranging from 50 to 200 dpa in the temperature range of 400 to 500°C. Post-irradiation characterization was performed primarily with scanning transmission electron microscopy and energy-dispersive x-ray spectroscopy to investigate the Y-Al-O dispersoids, voids, and dislocations. After welding, the dispersoid microstructure coarsened, resulting in fewer and larger dispersoids regardless of heat input. After irradiation, the dispersoid behavior in the welded material was sensitive to temperature, exhibiting growth behavior attributed to Ostwald coarsening at 500°C—but a mixture of nucleation and more muted growth at 400 and 450°C— attributed to competing mechanisms of radiation-enhanced diffusion and Ostwald coarsening. Void swelling correlated to heat input; it was much more prevalent in the welded conditions occurring at lower doses and in higher values relative to the base material. The low values of swelling despite microstructure coarsening caused by welding demonstrate the excellent swelling resistance of MA956, even after welding with the highest swelling values of 0.5% noted in the stir zone high heat input condition at 450°C, 200 dpa. The dislocation behavior was inconsistent: the strongest trend was that network density is higher for welded versus base material, and an increase in loop diameter with temperature was observed

Effect of Gamma Radiation on Selective Laser Sintered Nylon-12

Repository for manuscript detailing effect of gamma irradiation on selective laser sintered and injection molded nylon-12THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV

Powder Plasma Spheroidization and the Characterization of SS 316L Powder and L-PBF Builds

powder plasma spheroidization data repositoryTHIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV

Stainless and Inconel EBSD Data

Raw EBSD files supporting Title: In Situ Tensile Study of PM-HIP and Cast 316L Stainless Steel and Inconel 625 Alloys with High Energy Diffraction MicroscopyCorresponding Author: Donna GuillenCo-Authors: Darren C Pagan, PhD; Elizabeth M Getto, PhD; Janelle M Wharry, PhDTHIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV

Friction Stir Welding and Self-Ion Irradiation Effects on Microstructure and Mechanical Properties Changes with on Oxide Dispersion Strengthened Steel MA956

Joining processes for oxide dispersion strengthened (ODS) alloys remains a key challenge facing the nuclear community. The microstructure and mechanical properties were characterized in friction stir welded MA956 irradiated with 5 MeV Fe++ ions from 400 to 500°C up to 25 dpa. Nanoindentation was performed to assess changes in hardness and yield stress, and the dispersed barrier hardening (DBH) model was applied to described results. A combination of scanning transmission electron microscopy and atom probe tomography were used to assess evolution of the microstructure including dispersoids, dislocations and dislocation loops, nanoclusters, and solid solution concentrations. Overall, softening was observed as a result of increased dose and exacerbated at 500°C. The formation and coarsening of new dispersoids was noted while nanoclusters tended to dissolve in the base material, and were not identified in the stir zone. Solute nanocluster evolution was identified as a primary driver of the changes in mechanical properties.THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV