Oxidation-Mediated Fingering in Liquid Metals

We identify and characterize a new class of fingering instabilities in liquid metals; these instabilities are unexpected due to the large interfacial tension of metals. Electrochemical oxidation lowers the effective interfacial tension of a gallium-based liquid metal alloy to values approaching zero, thereby inducing drastic shape changes, including the formation of fractals. The measured fractal dimension ($D = 1.3 \pm 0.05$) places the instability in a different universality class than other fingering instabilities. By characterizing changes in morphology and dynamics as a function of droplet volume and applied electric potential, we identify the three main forces involved in this process: interfacial tension, gravity, and oxidative stress. Importantly, we find that electrochemical oxidation can generate compressive interfacial forces that oppose the tensile forces at a liquid interface. Thus, the surface oxide layer not only induces instabilities, but ultimately provides a physical barrier that halts the instabilities at larger positive potentials. Controlling the competition between surface tension and oxidative (compressive) stresses at the interface is important for the development of reconfigurable electronic, electromagnetic, and optical devices that take advantage of the metallic properties of liquid metals

The multiple ionospheric probe Auroral ionospheric report

Multiple impedance and resonance probe payload for ionospheric property observation in Nike- Apache rocke

Planning Data Management Education Initiatives: Process, Feedback, and Future Directions

Educating researchers in sound data management skills is a hot topic in today’s data intensive research world. Librarians across the country and the world are taking the lead in offering this training to their campus research communities. In Fall, 2013, the Data Curation Librarian at the University of Tennessee, Knoxville, held a one-day “Data Management Basics” Workshop geared towards graduate students in engineering and science disciplines based on the New England Collaborative Data Management Curriculum. Students were asked to complete a pre-workshop survey and a series of seven post-module surveys throughout the day. This article discusses the results of the survey feedback, the planning process, and elaborates on important variables in planning data management training initiatives, such as disciplinary adjustments and time constraints. The article concludes with a discussion of the author’s future plans for providing training initiatives based on the feedback he received

CLOVER ALL OVER: INVESTIGATING WILD TRIFOLIUM MANAGEMENT OF BACTERIAL SYMBIONTS

Legumes (Fabaceae) can develop symbiotic relationships with nitrogen fixing bacteria, rhizobia, to meet their need for nitrogen. Legumes recruit rhizobia from soil, house them in root organs called nodules, provide the bacteria with carbon compounds and receive biologically available nitrogen in return. The rhizobial transition from free living bacteria to host associated, nitrogen-fixing bacteroids is poorly understood. One mechanism by which the host manipulates bacterial development uses members of a large family of small antimicrobial peptides called Nodule-specific Cysteine-Rich (NCR) peptides. These are plant proteins exclusively expressed in the nodule and share a 4 or 6 cysteine residue motif. The genes and their associated peptides differ in number, sequence, and function across the legumes. Here we present a literature review of NCR peptides across leguminous species to aid in the understanding of legume host control of bacteria inside nodule tissue. Next, we present greenhouse experiment investigating the influence of non-rhizobia, nodule associated bacteria (NAB) on the fitness alignment of host and symbiont. We find that nodule associated bacteria do not have significant consequences for plant or bacterial fitness but can alter the alignment between host and symbiont fitness. Finally, we present assembled and annotated genomes of five Trifolium species and a summary of each species NCR gene family as an exploration of species-specific changes to NCR gene family structure. The NCR gene family in Trifolium is smaller than that in the model legume Medicago truncatula and similar across the species investigated

What Could Possibly Go Wrong? The Impact of Poor Data Management

This chapter highlights the importance of good data management practices by providing examples of problems a researcher may encounter when research data is poorly managed. It provides examples of actual situations when bad data management led to serious problems with data loss, research integrity, and worse. It also provides tips on how data management could have been done differently to encourage a more positive outcome

wâhkôtowin: A nehiyaw Ethical Analysis of Anti-Indigenous Racism in Canadian Nursing

Indigenous peoples in the settler state of Canada face racism on a daily basis, including in their interactions with nurses and the healthcare system. Canadian Nursing consistently fails to recognize their role in continuing to perpetrate anti-Indigenous racism. Many nurses are not taught enough about Indigenous history, settler colonialism and anti-racism to be able to recognize anti-Indigenous racism in practice, let alone effectively address it. Often the western based ethical principles nurses are taught in schools are weaponized against Indigenous peoples in practice. I propose using the nehiyaw (Cree) concept of wâhkôtowin as an ethical perspective that can help nurses tackle the problem of anti-Indigenous racism

Data Curation Education in Research Centers Poster

The volume of scientific data is growing exponentially across all scientific disciplines. Competent information professionals are needed to sort, catalog, store, and retrieve this data for future research and education requirements. In response to this need, the goal of the Data Curation Education in Research Centers (DCERC) project is to develop curriculum to educate information science students in the critical field of scientific data curation. Three masters degree students at University of Tennessee (UT) and three doctoral students at the University of Illinois, Urbana-Champaign are completing year one of the program. Each brings to the field of data curation skills obtained from prior work in diverse scientific and engineering professions. In the summers of 2012 and 2013, the masters students will travel to the National Center for Atmospheric Research (NCAR) in Boulder, Colorado, to work alongside scientists and researchers and to experience the demands of data curation at the source of data creation. The NCAR experience will allow students to assimilate the skills learned from the Fundamentals in Data Curation course, which will be completed in Spring 2012. This poster session will display and demonstrate the goals, student achievements, and overall program performance by providing examples of the specific skill sets the students are obtaining, projects they are completing, and expected future milestones