1,436 research outputs found
Estimating the historical distribution, abundance and ecological contribution of Modiolus modiolus in Strangford Lough, Northern Ireland
Strangford Lough is a large sheltered marine inlet in Northern Ireland. It is also a designated Special Area of Conservation based partially on the presence of an extensive area of Modiolus modiolus (Linnaeus, 1758) biogenic reef. However, this feature is believed to have declined substantially over the last 40 years. The objective of the study was to estimate the size of this decline both in terms of extent and abundance. This study combined (i) new survey data (a dedicated multibeam echo-sounder survey of the Lough), (ii) a habitat suitability model for M. modiolus with (iii) historical diver surveys to estimate the extent and abundance before 1985 (before the suspected period of greatest decline), 2003 (during the introduction of a ban on mobile fishing gear in the Lough) and 2007 (the most recent diver survey available). Estimations indicate that the extent reduced from approximately 12.6km2 in 1986 to just 5.7km2 by 2007 and the abundance declined by 87% in the same period. The decline has implications both for the remaining population of M. modiolus and ecosystem functionality within the Lough, which are both discussed in detail
Crowdfunding an Independent Film Project
Crowdfunding describes the collective cooperation, attention and trust by individuals who network and pool their money via a preferred Internet platform to support efforts initiated by other people or organizations. The “crowd” in crowdfunding is comprised of online donors from a web platform. Though crowdfunding crosses the lines of commercial, political and non-profit campaigns, it’s been most notable as a haven for philanthropic opportunity, namely the broad area we call “the arts.”
This post was originally published on the Cardozo Arts & Entertainment Law Journal website on January 14, 2015. The original post can be accessed via the Archived Link button above
Plasma Damage to NMOS Capacitors
High frequency C-V curves were taken of NMOS capacitors to determine the effect that a RF oxygen plasma has on the underlying thin gate oxide. This plasma was used to remove a positive photoresist. The C-V curves show a threshold voltage shift of 3.75 volts with respect to the undamaged capacitors. The C-V curves also show that the thinner were more affected than the thicker oxides
Creating a Differentiated Mathematics Classroom
Recognizing different mathematical learning styles and adapting differentiated teaching strategies can facilitate student learning
Straightening Identities in the Onsager Algebra
The purpose of this work is to formulate and prove some straightening identities in the Onsager algebra. Our identities allow one to rewrite specific products of basis elements as linear combinations of products which are in a different order. Such identities could be helpful in understanding the representation theory of the Onsager algebra
A randomized controlled trial of prospective memory rehabilitation in adults with traumatic brain injury
Objective: To examine the efficacy of compensatory prospective memory training, preceded by self-awareness training for adults with traumatic brain injury
Testing the Dark Matter Annihilation Model for the WMAP Haze
Analyses have found a "haze" of anomalous microwave emission surrounding the
Galactic Center in the WMAP sky maps. A recent study using Fermi data detected
a similar haze in the gamma-ray. Several studies have modeled these hazes as
radiation from the leptonic byproducts of dark matter annihilations, and
arguably no convincing astrophysical alternative has been suggested. We discuss
the characteristics of astrophysical cosmic ray sources that could potentially
explain this microwave and gamma-ray emission. The most promising astrophysical
scenarios involve cosmic ray sources that are clustered such that many fall
within ~1 kpc of the Galactic Center. For example, we show that several hundred
Galactic Center supernovae in the last million years plus a diffusion-hardened
electron spectrum may be consistent with present constraints on this emission.
Alternatively, it could be due to a burst of activity probably associated with
Sagittarius A* occurring ~1 Myr ago and producing >10^51 erg in cosmic ray
electrons. Different models predict different trends for the spectral index of
the microwave and gamma-ray spectrum as a function of angle from the Galactic
Center that should be robust to cosmic ray propagation uncertainties. In
particular, if the haze is from dark matter annihilations, it should have a
very hard microwave and gamma-ray spectrum for which the spectral shape does
not change significantly with angle, which we argue would be difficult to
achieve with any astrophysical mechanism. Observations with the Planck and
Fermi satellites can distinguish between viable haze models using these
signatures.Comment: 15 pages, 7 figures, accepted to MNRA
Human-Multirobot Collaborative Mobile Manipulation: the Omnid Mocobots
The Omnid human-collaborative mobile manipulators are an experimental
platform for testing control architectures for autonomous and
human-collaborative multirobot mobile manipulation. An Omnid consists of a
mecanum-wheel omnidirectional mobile base and a series-elastic Delta-type
parallel manipulator, and it is a specific implementation of a broader class of
mobile collaborative robots ("mocobots") suitable for safe human
co-manipulation of delicate, flexible, and articulated payloads. Key features
of mocobots include passive compliance, for the safety of the human and the
payload, and high-fidelity end-effector force control independent of the
potentially imprecise motions of the mobile base. We describe general
considerations for the design of teams of mocobots; the design of the Omnids in
light of these considerations; manipulator and mobile base controllers to
achieve useful multirobot collaborative behaviors; and initial experiments in
human-multirobot collaborative mobile manipulation of large, unwieldy payloads.
For these experiments, the only communication among the humans and Omnids is
mechanical, through the payload.Comment: 8 pages, 10 figures. Videos available at
https://www.youtube.com/watch?v=SEuFfONryL0. Submitted to IEEE Robotics and
Automation Letters (RA-L
The Don Edwards San Francisco Bay National Wildlife Refuge: A Natural Laboratory for Federal Agencies and Partners
The Don Edwards San Francisco Bay National Wildlife Refuge encompasses a rich mosaic of habitats and is a fecund and convenient field site for Earth science research, comprised of tidal salt marsh, open ponds, shallow water, mudflat habitat and encompassing a variety of tide, salinity, elevation, slope, and other conditions. Proximity to the NASA Ames Research Center and overlap with the center's UAS (unmanned aircraft systems) test area presents the opportunity to create a unique natural laboratory that can incubate and support a variety of research and benefit the Refuge in monitoring wildlife changes and habitat evolution over time
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