1,386 research outputs found
Larval responses to turbulence and temperature in a tidal inlet: Habitat selection by dispersing gastropods?
Full text linkAuthor 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
Constraints in Film Making Processes Offer an Exercise to the Imagination
No full textWhat does the use of constraints offer filmmakers? A screenwriter from The National Film School of Denmark suggests: “I love constraints [..]. I think that’s a great relief, because it offers an exercise to your imagination” (Philipsen 2005: 211). This article hopes to illuminate methods for fostering creativity based on two case studies from The National Film School of Denmark and The Video Clip Cup 2007. In scrutinising these studies I intend to describe what seems to best facilitate flow experiences in film making, and I reflect upon what "individual, team, and institutional scaffolding" can offer a creative film making process as educational techniques. I will outline elements essential to getting into the flow of the film process through the help of constraints and collaboration. Moreover, I focus on the consequences of authorial action. And finally my findings are applied to the work of two professional Danish film makers, Lars von Trier and Jørgen Leth
The Specificities of the North-European Seriality
No full textNorth-European television drama1 has recently gained success in both national and international markets, especially due to Nordic Noir series, such as Wallander, Forbrydelsen, Lilyhammer, Bron/Broen, and to a certain degree also SKAM (Bondebjerg and Redvall 2015; Jensen et al. 2016). With high audience gures, sales to international markets, and awards, these and other series anticipate success for North-European television. A success in no small measure due to the strength of the ‘Nordic Noir’ label. Traditional public service broadcasters (PSB) - like Norwegian NRK and Danish DR - play an important role in most of these successes, both as producers and as distributors (Hochscherf and Philipsen 2017). They have collaborated with international companies and tried new business-and cross-media-models in order both to reach larger markets and to share the production costs, but also to initiate creative processes together (Sundet in Bakøy et al. 2017).</p
Produktiv læring med film:i dansk og de praktisk-musiske fag - hvordan udvikles praksis?
No full textBest practice katalog til folkeskolelærere om produktiv filmlæring - baseret på forskningen vi har publiceret (Drotner & Philipsen 2016
Produktiv læring med film:i dansk og de praktisk-musiske fag - hvordan udvikles praksis?
No full textBest practice katalog til folkeskolelærere om produktiv filmlæring - baseret på forskningen vi har publiceret (Drotner & Philipsen 2016
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
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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
Recommended from our members
Heidi
No full textEarly edition of Heidi by Johanna Spyri. The cover of the book is red with white and black printed illustrations on it. The title and author's name are in gold. The illustration is over Heidi sitting across from a boy with her arm wrapped around a goat. In the background is a mountain with some trees and the sun peeking over the edge. On the inner cover is a illustrated print in bright green. In the illustration is Heidi standing in a forest with her arms held out above her head. On the cover page is a box which has some decorative motifs and contains the title and the names of the author, translator, author of the introduction, and the illustrator. Below that is a seal for the publishing company and then the locations and name of the publishing company. On the opposite page is an illustration of Heidi having a picnic with an older boy. They are sitting in a field holding bread and cheese. Behind them are several goats grazing on the mountainside. In the background is a forest of evergreens and more mountains
Constraints in Film Making Processes Offer an Exercise to the Imagination
Full text linkWhat does the use of constraints offer filmmakers? A screenwriter from The National Film School of Denmark suggests: “I love constraints [..]. I think that’s a great relief, because it offers an exercise to your imagination” (Philipsen 2005: 211). This article hopes to illuminate methods for fostering creativity based on two case studies from The National Film School of Denmark and The Video Clip Cup 2007. In scrutinising these studies I intend to describe what seems to best facilitate flow experiences in film making, and I reflect upon what "individual, team, and institutional scaffolding" can offer a creative film making process as educational techniques. I will outline elements essential to getting into the flow of the film process through the help of constraints and collaboration. Moreover, I focus on the consequences of authorial action. And finally my findings are applied to the work of two professional Danish film makers, Lars von Trier and Jørgen Leth
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