272 research outputs found
(1665) studies of marine and terrestrial invertebrates, and his contemplations on invertebrate “generation” and mutability
No full textFigure 2. The mouth, including the horny jaw, of a helicid snail, very likely Cornu aspersum (Müller). Engraving reproduced by permission of the Rare Book and Manuscript Library of the University of Pennsylvania.Published as part of Jervis, Mark A., 2014, A zoologist's perspective on Robert Hooke's Micrographia (1665) studies of marine and terrestrial invertebrates, and his contemplations on invertebrate "generation" and mutability, pp. 1375-1411 in Journal of Natural History 48 (23-24) on page 1379, DOI: 10.1080/00222933.2013.856492, http://zenodo.org/record/519373
Nutrient enrichment of Jervis Bay, Australia, during the massive 1992 coccolithophorid bloom
No full textA numerical simulation of the East Australian Current (EAC) has been used to investigate the nutrification of shelf waters at Jervis Bay, south-eastern Australia, prior to the massive coccolithophorid bloom that was first observed on 16 December 1992. The simulation suggests that a small cold-core eddy developed between the continental slope at Jervis Bay and the EAC jet further offshore during 7 and 14 December 1992. This unstable cold-core eddy is likely to have uplifted cold, nutrient-rich water onto the Jervis Bay shelf, and this upwelling, in combination with upwelling-favourable winds, probably transported nutrients from the deep ocean to the entrance of the bay
Figure 3 in Robert Hooke's Micrographia: an entomologist's perspective
No full textFigure 3. (A) the head of a horse-fly (Tabanus autumnalis L.); (B) the egg of a silkworm moth, Bombyx mori L.. Engravings reproduced by permission of the Rare Book and Manuscript Library of the University of Pennsylvania.Published as part of Jervis, Mark A., 2013, Robert Hooke's Micrographia: an entomologist's perspective, pp. 2531-2573 in Journal of Natural History 47 (39-40) on page 2544, DOI: 10.1080/00222933.2013.780270, http://zenodo.org/record/519782
Figure 4 in Robert Hooke's Micrographia: an entomologist's perspective
No full textFigure 4. (A) a male chironomid fly, identified as either Microtendipes pedellus De Geer or (less likely) Synendotendipes lepidus Meigen; (B) a female of an unidentified fly species belonging to the family Chironomidae. Engravings reproduced by permission of the Rare Book and Manuscript Library of the University of Pennsylvania.Published as part of Jervis, Mark A., 2013, Robert Hooke's Micrographia: an entomologist's perspective, pp. 2531-2573 in Journal of Natural History 47 (39-40) on page 2550, DOI: 10.1080/00222933.2013.780270, http://zenodo.org/record/519782
Figure 6 in Robert Hooke's Micrographia: an entomologist's perspective
No full textFigure 6. (A) a silverfish identified as Lepisma saccharina L.; (B) a female flea, identified as (most likely) the human flea, Pulex irritans L.. Engravings reproduced by permission of the Rare Book and Manuscript Library of the University of Pennsylvania.Published as part of Jervis, Mark A., 2013, Robert Hooke's Micrographia: an entomologist's perspective, pp. 2531-2573 in Journal of Natural History 47 (39-40) on page 2555, DOI: 10.1080/00222933.2013.780270, http://zenodo.org/record/519782
Figure 6 in Robert Hooke's Micrographia: an entomologist's perspective
No full textFigure 6. (A) a silverfish identified as Lepisma saccharina L.; (B) a female flea, identified as (most likely) the human flea, Pulex irritans L.. Engravings reproduced by permission of the Rare Book and Manuscript Library of the University of Pennsylvania.Published as part of Jervis, Mark A., 2013, Robert Hooke's Micrographia: an entomologist's perspective, pp. 2531-2573 in Journal of Natural History 47 (39-40) on page 2555, DOI: 10.1080/00222933.2013.780270, http://zenodo.org/record/519782
Figure 1 in Robert Hooke's Micrographia: an entomologist's perspective
No full textFigure 1. (A) sting of a honeybee, Apis mellifera L.; (B) feet of a muscoid fly; (C) high magnification view of part of a compound eye of a horse-fly (Tabanus autumnalis L.); (D) part of the forewing of an unidentified fly. Engravings reproduced by permission of the Rare Book and Manuscript Library of the University of Pennsylvania.Published as part of Jervis, Mark A., 2013, Robert Hooke's Micrographia: an entomologist's perspective, pp. 2531-2573 in Journal of Natural History 47 (39-40) on page 2540, DOI: 10.1080/00222933.2013.780270, http://zenodo.org/record/519782
Marine protection dividend
No full textAs the NSW government considers marine management reforms, this report finds that marine parks already provide significant economic benefits, but it is too early to judge their environmental effectiveness.This short paper presents compelling evidence that: NSW marine parks are already delivering clear and demonstrable economic benefits for local communities and businesses.The protected areas must be allowed to exist for a minimum of 15 years before they can be judged as to their effectiveness.Community support for marine parks and the sanctuary zones within them, is very high around the more established reserves. NSW marine parks are all relatively young. The oldest NSW marine parks are barely 11 years old and the youngest only six. In ecological terms, these parks are still in their infancy. Yet marine parks are already providing economic dividends to local communities, by attracting significant tourism. The establishment of the Solitary Island Marine Park, for example, saw a 20% increase in local business’s turnover in the first five years. Jervis Bay Marine Park has brought an estimated $2.4 million into the region through marine tourism. “Marine parks have become essential infrastructure for regional economies. As long as investment in the parks is maintained, benefits will continue to increase over years and even decades,” said report author Caroline Hoisington. Recreational and commercial fishing also benefit from marine parks, particularly sanctuary zones, where fishing is restricted. European studies have shown that for each year a sanctuary zone is in place, the number and/or size of commercially valuable fish increased by 8 per cent compared to surrounding fished areas. Benefits flow when these fish spill over into surrounding areas. “Local community support for sanctuary zones is 80 per cent or higher, in the three marine parks where opinions have been surveyed”, Caroline said. “The numbers are no different for recreational fishers.” Recreational fishing may also see bigger and better catches immediately, as competition from commercial fishing is reduced. However, sustainable fish stock management must also take account of recreational fishing, which makes up as much as 90 per cent of the catch for some NSW species. The report recommends the NSW Government set 15 years after zoning as the earliest point for making judgments about the impacts and environmental effectiveness of marine parks. Improvements in biodiversity, biomass and resilience of fish species will continue to take place after this time. The first fifteen years is not the end of benefits from marine parks, but is just enough time to show big changes. By contrast, decisions based on short-term assessments risk being driven by emotional reactions, rather than taking a balanced view based on evidence of the dividends that will continue to flow from marine parks
FPGA Realization of a Neural Network based Motor Controller
No full textFPGAs are a hardware solution for applications that require low power usage and real time execution. This work focuses on motor control. We show the design and FPGA implementation of a motor controller based on a small Neural Network (NN) as alternative to a traditional Proportional Integral (PI) controller that was used as reference. Performance metrics are defined from a simulation of the target motor. We investigate different NNs, training, code generation methods and numerical precisions. The best-performing controller is a multilayer NN trained with Reinforced Learning. The controller is implemented and runs on an Intel MAX 10 FPGA. The methodology described in this work is easily applicable to more complex designs when FPGAs become the best implementation platform
Jervis Bay Infauna Images
No full textMaintenance and Update Frequency: unknownStatement: UnknownGeoscience Australia carried out marine surveys in Jervis Bay (NSW) in 2007, 2008 and 2009 (GA303, GA305, GA309, GA312) to map seabed bathymetry and characterise benthic environments through co-located sampling of surface sediments (for textural and biogeochemical analysis) and infauna, observation of benthic habitats using underwater towed video and stills photography, and measurement of ocean tides and wave-generated currents. Data and samples were acquired using the Defence Science and Technology Organisation (DSTO) Research Vessel Kimbla. Bathymetric mapping, sampling and tide/wave measurement were concentrated in a 3x5 km survey grid (named Darling Road Grid, DRG) within the southern part of the Jervis Bay, incorporating the bay entrance. Additional sampling and stills photography plus bathymetric mapping along transits was undertaken at representative habitat types outside the DRG. <br/><br/>This folder contains the images derived from benthic samples taken on the surveys GA0312, GA0315 and GA0309 aboard HMS Kimbla. These images formed the first point of reference in identifying subsequent specimens to save wear and tear on the specimens put aside as reference material. Four phylum folders exist within the main folder: Annelida, Crustacea, Echinodermata and Mollusca. The crustacea folder contains further folders, breaking the images into finer groupings. Images of taxa that do not fit in the four phylum folders are loose in the main folder
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