Indiana University – Purdue University Fort Wayne
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Technoference and Implications for Mothers’ and Fathers’ Couple and Coparenting Relationship Quality
No full textPedagogy of Peace and Conflict: Building and Sharing Communication Curriculum to Transform
No full textCommunication\u27s Civic Callings is this year\u27s theme. What an ideal opportunity for peacebuilders and educators. According to the description, \u22The notion of \u22civic callings\u22 encompasses overlapping layers of communication in action, including our many roles as members of educational communities; our interactions with local and national governments; our commitments to NGOs and other organizations; our collaborations with colleagues from across the globe; and, increasingly, our involvements with issues that transcend nation-states…. the notion of \u22civic callings\u22 invites scholars to imagine our teaching, departmental structures, research, and public lives as political, as important aspects of the collective fabric of our communities.\u22 As teachers, researchers, and scholars primarily involved in the teaching of communication, how do we bring this content of peace and conflict to our students? Where does it fit within our curriculum? What dominant theories underlie this work, and how do we use this content to help transform approaches to peace and conflict? What pedagogical approaches work best? How to we build learning environments or provide internships to develop our students capacity for working on Peace and Conflict studies. Besides the facilitators, this panel features 19 panelists all from different colleges and universities, and all working on teaching peace in various ways
Sequential Analysis of Exploratory Behavior in Rats and Mice
No full textRats and mice are commonly used to investigate environmental cue based spatial navigation. As of yet, no studies have compared their self-movement cue processing. Sequential analysis of exploratory behavior revealed that both rodent species use self-movement cues; however, rats appear to be more accurate in distance estimatio
Timing of the Precambrian rise in atmospheric oxygen through molecular evolutionary reconstruction of the cyanobacterial sunscreen scytonemin
No full textMost paleo-environmental models argue that Earth’s atmosphere underwent a change from mildly reducing and anoxic, to its present oxygen-rich character sometime after the evolutionary advent of oxygenic photosynthesis in cyanobacteria in the Great Oxidation Event (GOE), the timing of which remains a matter of contention. Presently favored estimates from the geochemical rock record place the GOE between 2.45-2.22 billion years ago (Ga), while fossil or molecular evidence for oxygenation is of a much later and uncertain date (2.1-1.65 Ga). We estimated that the minimal evolutionary age of scytonemin, an indole-alkaloid used by cyanobacteria as an ultraviolet-A (UVA) sunscreen, is approximately 2.3 ± 0.8 Ga through phylogenetic reconstruction of several genes that encode for proteins involved in the biosynthesis of scytonemin, as calibrated against the cyanobacterial fossil record. Since the biologically useful form of scytonemin requires an oxidizing environment, and UVA radiation is only damaging in the presence of free oxygen, the minimal age of the scytonemin biosynthetic operon places a direct constraint on the minimal age of the GOE. Our findings significantly push back in time the biological evidence, providing genomics-derived support for geochemical constraints of the timing of the GOE
