4,065 research outputs found
Financing Capture Ready Coal-Fired Power Plants in China by Issuing Capture Options
âCapture Readyâ is a design concept enabling fossil fuel plants to be retrofitted more economically with carbon dioxide capture and storage (CCS) technologies, however financing the cost of capture ready can be problematic, especially in the developing world. We propose that fossil fuel plants issue tradable Capture Options to acquire financing. The Capture Option concept could move CCS forward politically in countries such as China, speed up CCS technology development, help Capture Ready investors diversify risk, and offer global warming investors an alternative investment opportunity. As a detailed case study, we assess the value of a Capture Option and Capture Ready plant for a 600 MW supercritical pulverized coal power plant in China, using a cash flow model with Monte-Carlo simulations. The gross value of Capture Ready varies from CNY3m (84.4m) at an 8% discount rate and the Capture Option is valued at CNY113m (167.3m) for two of the four scenarios analyzed
Aspects of M-5 brane world volume dynamics
This paper studies various aspects of the world volume dynamics of the
M-theory five-brane, including: non-BPS solutions and solution generating
symmetries; the scattering properties of world volume solutions; and the
equivalence with probe brane dynamics.Comment: 14 pages, latex. v2: Some additional comments and references adde
Ecological studies on flies associated with dung, with particular reference to scopeuma species (diptera)
Not availabl
Stabilization of the Cardiac Nervous System During Cardiac Stress Induces Cardioprotection
The cardiac nervous system consists of nested reflex feedback loops that interact to regulate regional heart function. Cardiac disease affects multiple components of the cardiac nervous system and the myocytes themselves. This study aims to determine: 1) how select components of the cardiac nervous system respond to acute cardiac stress, including myocardial ischemia (MI) and induced neural imbalance leading to cardiac electrical instability, and 2) how neuromodulation can affect neural-myocyte interactions to induce cardioprotection. Thoracic spinal cord stimulation (SCS) is recognized for its anti-anginal effects and ability to reduce apoptosis in response to acute MI, primarily via modulation of adrenergic efferent systems. The data presented here suggest that cervical SCS exerts similar cardioprotective effects in response to MI, but in contradistinction to thoracic SCS, uses both adrenergic and cholinergic efferent mechanisms to stabilize cardiomyocytes and the arrhythmogenic potential. SCS potentially can use efferent and/or anti-dromically activated cardiac afferents to mediate its cardioprotection. Thoracic SCS mitigates the MI-induced activation of both nodose and dorsal root ganglia cardiac-related afferents, doing so without antidromic activation of the primary cardiac afferents. Instead, thoracic SCS acts through altering the cardiac milieu thereby secondarily affecting the primary afferent sensory transduction. In response to cardiac stressors, reflex activation of efferent activity modifies mechanical and electrical functions of the heart. Excessive activation of neuronal input to the cardiac nervous system can induce arrhythmias. Stimulation of intrathoracic mediastinal nerves directly activates subpopulations of intrinsic cardiac neurons, thereby inducing atrial arrhythmias. Neuromodulation, either thoracic SCS or hexamethonium, suppressed mediastinal nerve stimulation (MSNS)-induced activation of intrinsic cardiac neurons and correspondingly reduced the arrhythmogenic potential. SCS exerted its stabilizing effects on neural processing and subsequent effects on atrial electrical function by selectively targeting local circuit neurons within the intrinsic cardiac nervous system. Together these data indicate that neuromodulation therapy, using SCS, can mitigate the imbalances in cardiac reflex control arising from acute cardiac stress and thereby has the potential to slow the progression of chronic heart disease
Cosmic Acceleration from M Theory on Twisted Spaces
In a recent paper [I.P. Neupane and D.L. Wiltshire, Phys. Lett. B 619, 201
(2005).] we have found a new class of accelerating cosmologies arising from a
time--dependent compactification of classical supergravity on product spaces
that include one or more geometric twists along with non-trivial curved
internal spaces. With such effects, a scalar potential can have a local minimum
with positive vacuum energy. The existence of such a minimum generically
predicts a period of accelerated expansion in the four-dimensional
Einstein-conformal frame. Here we extend our knowledge of these cosmological
solutions by presenting new examples and discuss the properties of the
solutions in a more general setting. We also relate the known (asymptotic)
solutions for multi-scalar fields with exponential potentials to the
accelerating solutions arising from simple (or twisted) product spaces for
internal manifolds.Comment: 23 pages, 3 figures; added a summary Table, PRD versio
Overlapping Branes in M-Theory
We construct new supersymmetric solutions of =11 supergravity describing
orthogonally ``overlapping" membranes and fivebranes for =2,\dots,8.
Overlapping branes arise after separating intersecting branes in a direction
transverse to all of the branes. The solutions, which generalize known
intersecting brane solutions, preserve at least of the supersymmetry.
Each pairwise overlap involves a membrane overlapping a membrane in a 0-brane,
a fivebrane overlapping a fivebrane in a 3-brane or a membrane overlapping a
fivebrane in a string. After reducing overlapping membranes to obtain
overlapping -2-branes in =10, -duality generates new overlapping
-brane solutions in type IIA and type IIB string theory. Uplifting certain
type IIA solutions leads to the =11 solutions. Some of the new solutions
reduce to dilaton black holes in =4. Additionally, we present a =10
solution that describes two -5-branes overlapping in a string. -duality
then generates further =10 solutions and uplifting one of the type IIA
solutions gives a new =11 solution describing two fivebranes overlapping in
a string.Comment: 21 pages (Harvmac b). A new discussion on solutions with four or more
overlaps is presented. References adde
Status of the KTeV Experiment at Fermilab
The KTeV experiment is a fixed target experiment at Fermilab. Its primary
goal is the search for direct CP violation in the decay of neutral kaons. Its
current status and some preliminary results will be discussed.Comment: 5 pages Latex, 4 figures; to be published in the proceedings of the
XVI International Workshop on Weak Interactions and Neutrinos, WIN '97,
Capri, Italy, June 22-28, 199
Maximising the impact of skills in the oil and gas industry: report on evaluation of pilots.
This report is the final document detailing the evaluation of two pilot programmes carried out during 2011/12. These pilots were the culmination of a 30 month project run by Robert Gordon University and Aberdeen College. Funding for the pilots (and the project more broadly) was provided by the Scottish Funding Council in support of the Scottish Government's 'Maximising the Impact of Skills' agenda
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