1,722,950 research outputs found
Dataset regarding "Multi-scale investigations of cold-water coral habitat using novel technology and advanced image analysis."
No full textThis dataset supports the thesis: Multi-scale investigations of cold-water coral habitat using novel technology and advanced image analysis, University of Southampton, 2021.
It comprises three parts:
SDM CWC Explorer Canyon Data (related to findings presented in chapter two)
Linear SfM transect CWC rugosity (related to findings presented in chapter three)
Annotations of Piddington Mound taxa (related to findings presented in chapter four) </span
Observations of thermospheric heating signatures associated with sub-kilometer scale auroral electrodynamics
No full textThis thesis presents analysis of thermospheric neutral temperature-altitude profiles derived from ground-based observations during intervals of auroral emission. Neutral temperature-altitude profiles are obtained in the magnetic zenith at unprecedented spatial (<10 km) and temporal resolution (<5 s). Electrodynamic processes associated with the formation mechanisms of auroral arcs are inferred via enhancements in the neutral temperature. The observations agree with leading arc-formation theories and provide further evidence supporting the existing literature. New evidence for the existence of filamentary field-aligned current (FAC) sheets, embedded in auroral arcs and directly linked to the formation of auroral curls, is presented. This thesis also provides a detailed outline of the development of a novel observational technique for determining neutral temperature-altitude profiles during intervals of auroral emission. This technique combines spectral observations from the High Throughput Imaging Echelle Spectrograph (HiTIES) and images from Auroral Structure and Kinetics (ASK) with radar observations from the EISCAT Svalbard Radar and the Southampton Ionospheric Model. A spectral inversion technique is utilised. Trial temperature profiles are converted into a synthetic emission spectrum via an integration in altitude across modelledN2 volume emission rate profiles. A least squares residual fitting process is used to evaluate the goodness-of-fit of the synthetic spectra that correspond to each random trial altitude-temperature profile, by determining its ability to recreate the HiTIES observed spectrum. Analysis of the outcome of multiple random trial profiles is used to estimate a final true thermospheric temperature profile. Neutral temperature variations are associated with specific auroral dynamics by comparing the temperature profiles with concurrent imaging observations from the ASK instrument
Pareci, Cabixi, Nambiquara. A case study in the western classification of native peoples
No full textPrice David. Pareci, Cabixi, Nambiquara. A case study in the western classification of native peoples. In: Journal de la Société des Américanistes. Tome 69, 1983. pp. 129-148
Multi-scale investigations of cold-water coral habitat using novel technology and advanced image analysis
No full textCold-water corals, like their shallow-water counterparts are capable of forming reef habitats that are important for their local environment. Cold-water corals are under increasing anthropogenic pressure and thus, the need to map their occurrence and understand their fundamental ecological role is essential in order to plan effective conservation measures. Cold-water coral reefs promote biodiversity with the introduction of structural complexity and substrate heterogeneity. Whilst the role of structural complexity is important and is a key criterion of Vulnerable Marine Ecosystem designation, we typically lack high-resolution data that can quantify such metrics. Ship-borne multibeam echosounder (MBES) data is typically low resolution, missing vital geomorphological features and the detailed video coverage is minimal in comparison. This results in Ill-matched datasets for mapping coral extent through predictive mapping and insufficient resolution to quantify cold-water coral reef structural complexity. We deployed an Autonomous Underwater Vehicle (AUV) to collect high-resolution MBES data and Remotely Operated Vehicles to collect images for Structure from Motion (SfM) to bridge the gaps in data resolution and undertake novel fine-scale investigations. We aimed to utilise high resolution data to accurately predict cold-water coral distribution and to use 3D photogrammetry to quantify the influence of cold-water coral reef structure on associated taxa diversity and distribution.The results in this thesis show that by resolving fine-scale geomorphological features with high-resolution bathymetry, additional locations suitable for cold-water coral growth can be identified. The results further highlighted the importance of vertical walls in Explorer Canyon, NE Atlantic, as a habitat for cold-water coral. This thesis also demonstrates how SfM can be used to quantify cold-water coral structural complexity. Cold-water coral reef in Explorer Canyon introduces significant structural complexity on a centimetric scale, promoting local biodiversity and providing a distinct cold-water coral habitat when coral coverage was greater than 30%. Further investigations reveal that cold-water coral associated taxa are not randomly distributed within cold-water coral reefs, instead local geomorphic properties such as rugosity and inferred biotic interactions are conducive to localised clustering of reef associated species. The combination of scales of analysis quantitively depict how important cold-water coral are to their local environment and more accurately indicate their true spatial extent providing useful information for marine spatial planning
Dataset in support of the thesis 'Observations of thermospheric heating signatures associated with sub-kilometer scale auroral electrodynamics'
No full textThis dataset contains:
VIDEO (ASK1.avi):
The video shows ASK1 data taken during the time interval during which the aurora is visible in the field of view (06:06:05 - 06:08:30 UT).
The temporal resolution of the raw data is 31.25ms (32 Hz) and the video is played at real time (32 Hz). The ASK1 filter has a central
wavelength of 673nm and a full-width-half-maximum of 15nm.
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SPECTRA (spectra_top.dat, spectra_mid.dat, spectra_bot.dat):
Data files containing half-second resolution emission spectra, taken by each section of the HiTIES slit during the event, are provided under the
names 'spectra_[slit section].dat'. The time interval covered in this data is between 06:06:05 and 06:08:30 UT.
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N2 VOLUME EMISSION RATE PROFILES (n2_volume_emission_top.dat, n2_volume_emission_mid.dat, n2_volume_emission_bot.dat):
Data files containing modelled half-second resolution N2 volume emission rate profiles are provided under the names 'n2_volume_emission_[slit section].dat'.
The time interval covered by this data is indentical to the spectral data, between 06:06:05 and 06:08:30 UT.
Date of data collection:
All data was collected on the 2nd of February 2017.
Information about geographic location of data collection:
Data was collected by the ASK and HiTIES instruments located on the island of Spitzbergen in the Svalbard archipelago in northern Norway (78.15 N, 16.03 E). </span
Gamma Globulin Distribution Activities -- January 1-October 1, 1953 -- United States Public Health Service -- letter, 1953-10-31
No full textLetter from Price, David E. to Sabin, Albert B. dated 1953-10-31.Sabin Collection Fair Use Policy</a
General Correspondence -- 1946-66 -- United States Public Health Service -- letter, 1949-09-22
No full textLetter from Price, David E. to Sabin, Albert B. dated 1949-09-22.Sabin Collection Fair Use Policy</a
Matrix isolation studies of some high temperature molecules
No full textSIGLEAvailable from British Library Document Supply Centre- DSC:D33605/81 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
Dual use anthropology and the politics of history
No full textResponse to HAU Book Symposium on Price, David. 2016. Cold War anthropology: The CIA, the Pentagon, and the growth of dual use anthropology. Durham, NC: Duke University Press
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