56 research outputs found
Photogrammetric video tracks of Antarctic blue whale movements recorded during the 2013 Antarctic Blue Whale Voyage
No full textProgress Code: completedDuring the 2013 Antarctic Blue Whale Voyage of the Southern Ocean Research Partnership a photogrammetric video tracking system was used to collect precise surfacing locations during encounters with some Antarctic blue whales. The photogrammetric video tracking system is described by Leaper and Gordon 2001, and enables determination of the range and bearing to tracked objects relative to the ship. <br/><br/>During the voyage, 32 tracking sessions yielded 553 precise photogrammetric locations comprising a total of 27 tracks of blue whales.<br/><br/>Leaper, R. and Gordon, J. 2001. Application of photogrammetric methods for locating and tracking cetacean movements at sea. Journal of Cetacean Research and Management, 3: 131-141
Photogrammetric video tracks of whale movements recorded during the 2019 ENRICH Voyage (IN2019_V01)
No full textProgress Code: completedStatement: Data are good quality, with no known issues or problems.<b>Purpose</b><br/>Photogrammetric video tracking was conducted in order to obtain data on baseline surface behaviour and fine-scale movements of Antarctic blue whales, and to enable investigation of relationships among vocal activity, behaviour, and movement.During the 2019 ENRICH Voyage of the CSIRO vessel, RV Investigator (IN2019_V01), a digital photogrammetric video tracking system was used to collect precise surfacing locations during encounters with mainly Antarctic blue whales, but also some fin whales. The photogrammetric video tracking system is a modern digital video version based on the same operating principle as the that described by Leaper and Gordon 2001, and enables determination of the range and bearing to tracked objects relative to the ship.<br/><br/>Video tracking was conducted on 24 occasions for a total of 18 hours. Focal follows were aborted when it was no longer possible to follow the focal animal due to ice or when the presence of other animals meant it was no longer possible to be sure which was the focal animal. <br/><br/>Leaper, R. and Gordon, J. 2001. Application of photogrammetric methods for locating and tracking cetacean movements at sea. Journal of Cetacean Research and Management, 3: 131-141
The first principles of photography : an elementary treatise on the scientific principles upon which practical photography depends /
No full textIncludes index.Based on the author's lectures delivered since 1882 at the Dublin Mechanics' Institute and at the City of Dublin Technical Schools.Mode of access: Internet
Consequences of climate-driven biodiversity changes for ecosystem functioning of North European rocky shores
No full textWe review how intertidal biodiversity is responding to globally driven climate change,
focusing on long-term data from rocky shores in the British Isles. Physical evidence of warming
around the British Isles is presented and, whilst there has been considerable fluctuation, sea surface
temperatures are at the highest levels recorded, surpassing previous warm periods (i.e. late 1950s).
Examples are given of species that have been advancing or retreating polewards over the last 50 to
100 yr. On rocky shores, the extent of poleward movement is idiosyncratic and dependent upon life
history characteristics, dispersal capabilities and habitat requirements. More southern, warm water
species have been recorded advancing than northern, cold water species retreating. Models have
been developed to predict likely assemblage composition based on future environmental scenarios.
We present qualitative and quantitative forecasts to explore the functional consequences of changes
in the identity, abundance and species richness of gastropod grazers and foundation species such as
barnacles and canopy-forming algae. We forecast that the balance of primary producers and secondary
consumers is likely to change along wave exposure gradients matching changes occurring
with latitude, thereby shifting the balance between export and import of primary production.
Increases in grazer and sessile invertebrate diversity are likely to be accompanied by decreasing
primary production by large canopy-forming fucoids. The reasons for such changes are discussed in
the context of emerging theory on the relationship between biodiversity and ecosystem functioning.
KEY WORDS: Climate change · Intertidal · Range shifts · Biodiversity · Ecosystem functioning ·
Northeast Atlanti
Sharp technique for wound debridement
No full textWhen necrotic or foreign material is present in a wound, sharp or surgical debridement can reduce the risk of infection and sepsis and aid wound healing. In this article the author considers the various methods of debridement and concludes that sharp debridement should be considered as the \u27gold standard\u27. copyright \ua9 1992-Feb 2001 by SMTL
Gender, Dispositions, Peer Relations, and Identity
No full textThis chapter considers possible ways that peer relations, group identity, and dispositional preferences are interrelated and contribute to children’s gender development. The author advances an integrative theoretical model of gender development that bridges complementary theories by linking sex-related dispositions and physical characteristics to the process of assimilation within same-gender peer groups. Research suggests some (but not all) children have strong behavioral dispositions (temperaments and intense interests) and physical characteristics that are either highly compatible or highly contradictory with culturally valued in-group prototypes (e.g., boys strongly inclined toward physical activities vs. dress-up play, respectively). These children may either become same-gender role models or disidentify with the gender in-group, respectively. In contrast, children without strong dispositions may be most amenable to developing a broad repertoire of interests when provided opportunities and encouragement. Implications of this model for the development and well-being of children as well as future directions for research are discussed.</p
A Meta-Analytic Review of Gender Variations in Adults' Language Use: Talkativeness, Affiliative Speech, and Assertive Speech
No full textThree separate sets of meta-analyses were conducted of studies testing for gender differences in adults' talkativeness, affiliative speech, and assertive speech. Across independent samples, statistically significant but negligible average effects sizes were obtained with all three language constructs: Contrary to the prediction, men were more talkative (d = -.14) than were women. As expected, men used more assertive speech (d = .09), whereas women used more affiliative speech (d = .12). In addition, 17 moderator variables were tested that included aspects of the interactive context (e.g., familiarity, gender composition, activity), measurement qualities (e.g., operational definition, observation length), and publication characteristics (e.g., author gender, publication source). Depending on particular moderators, more meaningful effect sizes (d > .2) occurred for each language construct. In addition, the direction of some gender differences was significantly reversed under particular conditions. The results are interpreted in relation to social-constructionist, socialization, and biological interpretations of gender-related variations in social behavior
The use of carbon nanomaterials in membrane distillation membranes: A review
No full textMembrane distillation (MD) is a thermal-based separation technique with the potential to treat a wide range of water types for various applications and industries. Certain challenges remain however, which prevent it from becoming commercially widespread including moderate permeate flux, decline in separation performance over time due to pore wetting and high thermal energy requirements. Nevertheless, its attractive characteristics such as highrejection (~100%) of non-volatile species, its ability to treat highly saline solutions under low operating pressures (typically atmospheric) as well as its ability to operate at low temperatures, enabling waste-heat integration, continue to drive research interests globally. Of particular interest is the class of carbon-based nanomaterials which includes graphene and carbon nanotubes, whose wide range of properties have been exploited in an attempt to overcome the technical challenges that membrane distillation faces. These low dimensionalmaterials exhibit properties such as high specific surface area, high strength, tuneable hydrophobicity, enhanced vapour transport, high thermal and electrical conductivity and others. Their use in MD has resulted in improved membrane performance characteristics like increased permeability and reduced fouling propensity. They have also enabled novel membrane capabilities such as in-situ fouling detection and localised heat generation. In this review we provide a brief introduction to membrane distillation and describe key membranecharacteristics and fabrication methods. We then give an account of the various uses of carbon nanomaterials for MD applications, focussing on polymeric membrane systems. Future research directions based on the findings are also suggested
PIM-1 Membranes Containing POSS - Graphene Oxide for CO2 Separation
No full textPIM-1 mixed matrix membranes (MMMs) were fabricated with polyhedral oligomeric silsesquioxane (POSS) and graphene oxide (GO) functionalized with POSS (GO-POSS), and tested for CO2/N2 (single gas) and CO2/CH4 (1:1, v:v gas mixture). The CO2 permeability of the best performing fresh MMM (containing 0.05 wt% GO-POSS) was ∼ 12000 Barrer, which is 69% higher than that of the neat PIM-1 membrane, with about the same selectivity (CO2/CH4 selectivity ∼ 12 and CO2/N2 selectivity ∼ 20). In both cases, the gas separation data surpass the 2008 Robeson upper bound. In addition to the initial CO2 permeability enhancement, the use of GO-POSS is an efficient strategy to slow down physical aging. The MMM at a filler loading of 0.75 wt% showed less than half of the reduction in CO2 permeability than the neat PIM-1 membrane 160 days after preparation (26% for the MMM vs 58% for the purely polymeric one)
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