From Invisible to Visible: Impacts of Metadata in Communicative Data Visualization.

Leaving the context of visualizations invisible can have negative impacts on understanding and transparency. While common wisdom suggests that recontextualizing visualizations with metadata (e.g., disclosing the data source or instructions for decoding the visualizations' encoding) may counter these effects, the impact remains largely unknown. To fill this gap, we conducted two experiments. In Experiment 1, we explored how chart type, topic, and user goal impacted which categories of metadata participants deemed most relevant. We presented 64 participants with four real-world visualizations. For each visualization, participants were given four goals and selected the type of metadata they most wanted from a set of 18 types. Our results indicated that participants were most interested in metadata which explained the visualization's encoding for goals related to understanding and metadata about the source of the data for assessing trustworthiness. In Experiment 2, we explored how these two types of metadata impact transparency, trustworthiness and persuasiveness, information relevance, and understanding. We asked 144 participants to explain the main message of two pairs of visualizations (one with metadata and one without); rate them on scales of transparency and relevance; and then predict the likelihood that they were selected for a presentation to policymakers. Our results suggested that visualizations with metadata were perceived as more thorough than those without metadata, but similarly relevant, accurate, clear, and complete. Additionally, we found that metadata did not impact the accuracy of the information extracted from visualizations, but may have influenced which information participants remembered as important or interesting.

Reformulating Graham v. Connor's Excessive Force Test to ADApt for Individuals with Disabilities.

Individuals with disabilities are sixteen times more likely to be killed by officers during a law enforcement encounter than other individuals. As the ever-growing list of victims demonstrates, law enforcement violence against individuals with disabilities is a national crisis. Yet, the current test, developed under Graham v. Connor, for whether officers' use of force is excessive during an arrest considers only three factors: severity of the crime, immediacy of the threat, and resistance to arrest or attempts to flee. On its face, Graham's three-factor test does not contemplate whether an arrestee's individual characteristics are relevant to an officer's use of force. Recognizing that the Graham factors are "non-exhaustive" and "flexible," some lower federal courts have relaxed the excessive force test to account for particular circumstances. However, there is no consensus among the circuit courts and the Supreme Court has not revisited the Graham test.Over three decades later, courts still do not have sufficient guidance on how to address individual disability under Graham. This Note advocates that in adherence to Graham's expressed flexibility, its three-factor test should be reformulated to add in a fourth factor inspired by Title II of the Americans with Disabilities Act to account for whether "reasonable modifications" of an individual's disability were made in situations when law enforcement employs force during the course of an arrest. Applying this standard in cases where an officer "reasonably should know" the arrestee has a disability promotes a baseline assumption that law enforcement officers have an active role in accommodating all disabilities.

Removal and retention of viral aerosols by a novel alumina nanofiber filter.

Nanomaterial, due to its unique physical, chemical and biological properties compared to its bulk counterparts, has the potential to provide a product superior to its bulk predecessor. In this study, a novel alumina nanofiber filter was assessed for its removal and retention capability for MS2 aerosol. Its physical removal efficiency in the 10-400 nm range was 94.35%, while its viable removal efficiency was 98.87%, which was slightly lower than three conventional HEPA filters tested. However, its pressure drop was much lower than HEPA filters, yielding a higher filter quality than HEPA filters. The average extracted fraction from the nanofiber filter was 8.64×10-2±7.00×10-2, which is three orders lower than other HEPA filters, demonstrating that the viruses were effectively retained in the nanofiber filter. Furthermore, the performance of the nanofiber filter showed no dependence on relative humidity. In conclusion, this novel alumina nanofiber filter presents advantageous potential for removal and retention of viral aerosol agents.