7,668 research outputs found
Renewable power options enabled by Local Electricity Trading.
The paper is prepared as part of an Australian Renewable Energy Agency (ARENA) funded research project led by the Institute for Sustainable Futures (ISF) at the University of Technology Sydney (UTS), Facilitating Local Network Charges and Virtual Net Metering and a project funded by the Victorian Government Department of Environment, Land, Water and Planning (DELWP), Virtual Renewable Power Stations. A key task in the ISF project is to run five virtual trials of Local Electricity Trading (LET)1 and local network charges, one of which will take place in the Moira Shire and Swan Hill Rural City Council areas in regional Victoria. The Moira and Swan Hill trial will examine either the business model for a one-to-many (Community Power Station) or for a many-to-one (also called a Virtual Power Station, or VPS). Both of these models are likely to be enabled if Local Electricity Trading becomes commonly available. The primary interest of the Councils is to improve the resilience of the local economy by retaining energy spending within the area, to increase the capacity of local renewable energy generation and to enable local residents and businesses to participate in the renewable energy generation. The purpose of this paper is to assist the Councils to choose which model to take forward into a trial
Local Network Charges and Local Electricity Trading: Market Scan
This report provides an overview of current literature and information relating to local network charges, local electricity trading (also called virtual net metering or VNM), and virtual power stations. The focus is information particularly relevant to Australia, as well as global precedents in each area
Twisting type-N vacuum fields with a group
We derive the equations corresponding to twisting type-N vacuum gravitational
fields with one Killing vector and one homothetic Killing vector by using the
same approach as that developed by one of us in order to treat the case with
two non-commuting Killing vectors. We study the case when the homothetic
parameter takes the value -1, which is shown to admit a reduction to a
third-order real ordinary differential equation for this problem, similar to
that previously obtained by one of us when two Killing vectors are present.Comment: LaTeX, 11 pages. To be published in Classical and Quantum Gravit
The Impact of New EUV Diagnostics on CME-Related Kinematics
We present the application of novel diagnostics to the spectroscopic
observation of a Coronal Mass Ejection (CME) on disk by the Extreme Ultraviolet
Imaging Spectrometer (EIS) on the Hinode spacecraft. We apply a recently
developed line profile asymmetry analysis to the spectroscopic observation of
NOAA AR 10930 on 14-15 December 2006 to three raster observations before and
during the eruption of a 1000km/s CME. We see the impact that the observer's
line-of-sight and magnetic field geometry have on the diagnostics used.
Further, and more importantly, we identify the on-disk signature of a
high-speed outflow behind the CME in the dimming region arising as a result of
the eruption. Supported by recent coronal observations of the STEREO
spacecraft, we speculate about the momentum flux resulting from this outflow as
a secondary momentum source to the CME. The results presented highlight the
importance of spectroscopic measurements in relation to CME kinematics, and the
need for full-disk synoptic spectroscopic observations of the coronal and
chromospheric plasmas to capture the signature of such explosive energy release
as a way of providing better constraints of CME propagation times to L1, or any
other point of interest in the heliosphere.Comment: Accepted to appear in Solar Physics Topical Issue titled "Remote
Sensing of the Inner Heliosphere". Manuscript has 14 pages, 5 color figures.
Movies supporting the figures can be found in
http://download.hao.ucar.edu/pub/mscott/papers/Weathe
The effects of heat versus cold disinfection on the Wesley-Jessen Durasoft 4 Litetint soft contact lens
An evaluation of the Wesley-Jessen 74% water Durasoft 4 LiteTint soft contact lens was made using 18 lenses on nine subjects and two pairs of control lenses. Five subjects cold disinfected the lenses and four subjects heat disinfected the lenses using Softmate PS regimens. One pair of control lenses was disinfected with each system . The results of the study show that heat disinfection can damage these lenses. Three of five pairs of lenses that were heat disinfected showed discoloration upon completion of the study. This includes one pair of control lenses which were heated once daily for 6 months, the duration of the study. All cold disinfected lenses remained normal. Other results show problems with Durasoft 4 lenses not attributable to the type of disinfection used. These problems include: difficulty in handling and determining whether inside-out or not, discomfort and severe drying symptoms, a rapid decrease in wearing time, and a tendency to accumulate deposits rapidly. Only one subject remained in the study for the 6 month duration. All others left early due to lens discomfort. Each subject was seen on a follow-up schedule and normal clinical methods were used to evaluate symptomology, fitting characteristics, and refractive changes. The results suggest that dehydration in these high water content lenses is the primary problem leading to discomfort
Multi-site mean-field theory for cold bosonic atoms in optical lattices
We present a detailed derivation of a multi-site mean-field theory (MSMFT)
used to describe the Mott-insulator to superfluid transition of bosonic atoms
in optical lattices. The approach is based on partitioning the lattice into
small clusters which are decoupled by means of a mean field approximation. This
approximation invokes local superfluid order parameters defined for each of the
boundary sites of the cluster. The resulting MSMFT grand potential has a
non-trivial topology as a function of the various order parameters. An
understanding of this topology provides two different criteria for the
determination of the Mott insulator superfluid phase boundaries. We apply this
formalism to -dimensional hypercubic lattices in one, two and three
dimensions, and demonstrate the improvement in the estimation of the phase
boundaries when MSMFT is utilized for increasingly larger clusters, with the
best quantitative agreement found for . The MSMFT is then used to examine
a linear dimer chain in which the on-site energies within the dimer have an
energy separation of . This system has a complicated phase diagram
within the parameter space of the model, with many distinct Mott phases
separated by superfluid regions.Comment: 30 pages, 23 figures, accepted for publication in Phys. Rev.
Building a Level Playing Field for Local Energy: Local Network Charges and Local Electricity Trading Explained
Virtual trial of Local Electricity Trading and Local Network Credits: a community solar farm
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