1,231 research outputs found
In Memoriam: Heidi Gauder
No full textHeidi Gauder, professor, coordinator of research and instruction, and humanities librarian in the University Libraries, died Nov. 18
Collaborating for Better Student Research Papers
No full textProfessor Heidi Gauder (Libraries) and Professor Michelle Pautz (Political Science) collaborated to foster a better learning opportunity for students in POL371: Environmental Policy, resulting in a published article about their approach
Life on Brown Street, 1920
No full textBridget Retzloff and Heidi Gauder take readers on an interactive trip back in time to the Brown Street business district of the 1920s
Making Connections: Exploring African American history and the UD Community
No full textHeidi Gauder and Kristina Schulz help students use primary sources to reveal more of the African American story at UD and in Dayton during the first half of the 20th century
Co-curricular Innovation: Teaching about Patents as Primary Sources
No full textWith the rich history of airplane and automotive invention in Dayton, Ohio, and the value of patents as primary sources in mind, librarians Bridget Garnai and Heidi Gauder designed and led two interactive, co-curricular workshops at University of Dayton’s (UD) Roesch Library in Fall 2019 and Spring 2020. Their goals were to introduce students to patents as primary sources that influence daily life and expand students’ ideas of what kinds of research can be supported by patents as primary sources. To that end, Garnai and Gauder created two workshops centered around patents as primary sources, “Patent Pending: Innovation in Society” and “Dayton Patented.” In each of these workshops, participants learned about patents through a mini lecture and a collaborative digital humanities project
Larval responses to turbulence and temperature in a tidal inlet: Habitat selection by dispersing gastropods?
No full textAuthor Posting. © Sears Foundation for Marine Research, 2010. This article is posted here by permission of Sears Foundation for Marine Research for personal use, not for redistribution. The definitive version was published in Journal of Marine Research 68 (2010): 153-188, doi:10.1357/002224010793079013.Marine larval dispersal is affected by hydrodynamic transport and larval behavior, but little is known about how behavior affects large-scale patterns of dispersal and recruitment. Intertidal habitats are characterized by strong and variable turbulence relative to shelf and pelagic waters, so larval responses to turbulence may affect both dispersal and habitat selection. This study combined observations and theoretical approaches to model gastropod larval responses to multiple physical variables in a well-mixed tidal inlet. Physical measurements and larvae were collected in July 2004 in Barnstable Harbor, Massachusetts (USA). Physical measurements were incorporated in an advection-diffusion model where larval vertical velocity is a function of turbulence dissipation rate, temperature, and the temperature gradient. Modeled larval distributions were fitted to observed concentration profiles by maximum likelihood to estimate larval behavioral velocity (swimming or sinking) as a function of environmental conditions. These quantitative behavior estimates were used to test hypotheses about behavioral differences among groups and to assess the relative impact of different cues on overall larval behavior. Larvae of five common gastropod species from different coastal habitats reacted most strongly to turbulence but had genus-specific responses to environmental cues. Larvae of a species from tidal inlets (the mud snail Nassarius obsoletus) had near-zero velocities under calmer conditions and sank in strong turbulence. In contrast, larvae from exposed beach habitats (Crepidula spp. and Anachis spp.) sank in weak turbulence and swam up in strong turbulence, with additional responses to temperature and temperature gradient. Larval responses also differed between small and large size classes and between flood and ebb tides. Behavior of mud snail larvae would contribute to retention inside the inlet and near adult habitats, whereas behavior of beach snail larvae would contribute to rapid export from muddy inlets lacking suitable adult habitats.This work was funded by the Woods Hole Oceanographic Institution (WHOI) Coastal Ocean
Institute, the WHOI Rinehart Coastal Research Center, the National Science Foundation (NSF OCE-
0326734), NSF and US Office of Naval Research grants to S. Elgar and B. Raubenheimer, and the
WHOI Sea Grant (National Oceanic and Atmospheric Administration, Grant No. NA16RG2273,
project no. R/O-38-PD). Analyses were completed while HLF was a postdoctoral scholar at Scripps
Institution of Oceanography (SIO), supported by the California Current Ecosystem Long-Term Ecological
Research program (NSF OCE-0417616) and by SIO funding to P. Franks
Mussel larval responses to turbulence are unaltered by larvalage or light condition
No full textLarval responses to hydromechanical cues potentially have important effects on larval dispersal and settlement. This study examined the behavior of mussel larvae (Mytilus edulis) in laboratory-generated turbulence representative of nearshore currents. We video recorded the behavior of early- and late-stage veligers in a grid-stirred tank at five turbulence levels under light and dark conditions. Water velocities and kinetic energy dissipation rates were measured using particle image velocimetry and acoustic Doppler velocimetry. We characterized the vertical velocity distributions for sinking, hovering, and swimming modes in still water and calculated the average larval behavioral velocity in turbulence. In still water, young larvae had more positive (upward) velocities than old larvae, and both stages had more positive velocities in light than in dark. In turbulence, the mean larval vertical velocity varied from positive at low dissipation rates to negative at dissipation rates above a threshold of 8.3 £ 1022 cm2 s23. At this threshold, the Kolmogorov length scale (h ¼ 590mm) was two to three times the mean larval shell lengths (171–256mm), implying that turbulence is detectable even by larvae that are smaller than the smallest eddies. Responses to turbulence were unaffected by larval age or light conditions and contributed substantial behavioral variation. By sinking in strong turbulence, mussel larvae could increase their flux to the bed in energetic coastal flows, particularly over rough substrates like mussel beds. The response to turbulence by early-stage larvae will also affect their dispersal and may help larvae remain near coastal populations.Peer reviewedOriginally published in Limnology and Oceanography: Fluids & Environments (2011) and available via this link: http://lofe.dukejournals.org/content/1/120.full.pdfCopyright 2011 by the Association for the Sciences of Limnology and Oceanography, Inc
Sourcing Southerne: origins of the tragic plot in Thomas Southerne's Oroonoko
No full textAlthough certainly indebted to Aphra Behn’s novella of the same name, Thomas Southerne’s Oroonoko draws inspiration for its Restoration hero, as well as additional characters and themes, from Marc Antony as depicted in John Dryden’s All for Love and Nathaniel Bacon as in Behn’s The Widdow Ranter.M.A.Includes bibliographical referencesby Heidi Duga
Recommended from our members
Heidi
No full textEarly edition of Heidi by Johanna Spyri. The cover is made of a plain red cloth and on the spine is the title of the book, the face of a goat, and the names of the author and illustrator
- …
