635 research outputs found
П.П. Пазолини и Л.Н. Толстой (Теорема и Смерть Ивана Ильича)
В статье исследуются связи между
«Смертью Ивана Ильича» Л.Н. Тол-
стого и «Теоремой» П.П. Пазолини в
контексте их творчества.The article investigates the connection
between The Death of Ivan Ilyich by L.N.
Tolstoy and The Theorem by P. P. Pasolini
in the context of their art
Design challenges in the use of silicon carbide JFETs in matrix converter applications
This paper investigates some of the challenges en¬countered during the implementation of a Silicon Carbide JFET matrix converter which has been designed to meet a specific power density of 20kW/litre with forced air cooling. After a brief introduction to the main features of the hardware implementation of the power converter, an insight into the control strategy and controller platform adopted is given with a particular attention to the issues relating to the high switching frequencies on the controller requirements and the performance implications of the gate drive circuitry. An analysis of the results which show the effects of gate driver and controller induced commutation time limitations on the output waveform quality is presented. Wide bandgap semiconductor devices offer the power electronic engineer new opportunities for high speed, high efficiency designs but these devices cannot be used as a simple like for like replacements and as such the whole converter system needs to be looked at
Found a Cockroach? (Saw a GAZILLION?)
NYS IPM Type: Community IPM BrochureNYS IPM Type: BrochureA brochure describing how to identify types of cockroaches and how to prevent them from entering and living in homes and other buildings
The INGRID project: Development of Solutions for Sustainable and Highly Interconnected Grids
One of the current main challenges in green-power storage and smart grids is the lack of effective solutions for accommodating the unbalance between renewable energy sources - offering intermittent electricity supply - and a variable electricity demand. Integrating intermittent renewable energy sources by safe and cost-effective energy storage systems is today achievable. Coupled with electrolizers, high-capacity solid-state storage of green-hydrogen is practicable to sustain integration, monitoring and control of large quantity of GWh from renewable generation. The 23.9 MLN Euros INGRID European large demonstrative project started in July 2012 combines magnesium-based material solid-state hydrogen storage systems with advanced ICT technologies to intelligently interconnect miscellaneous energy networks (i.e. electricity and gas) and safely delivering green-hydrogen to various existing or forthcoming markets. One solution INGRID project addresses is an off-grid utility to store renewable electricity captured from wind sources to refill full-battery electric cars
Operant conditioning of single units in rat motor cortex allows graded control of a prosthetic device
Low Energy Properties of the (n,n) Carbon Nanotubes
According to band theory, an ideal undoped (n,n) carbon nanotube is metallic.
We show that the electron-electron interaction causes it to become Mott
insulating with a spin gap. More interestingly, upon doping it develops
superconducting fluctuations.Comment: 5pages, 2eps figures, one reference added, final version, accepted to
PR
Glial β-Oxidation regulates drosophila energy metabolism
The brain's impotence to utilize long-chain fatty acids as fuel, one of the dogmas in neuroscience, is surprising, since the nervous system is the tissue most energy consuming and most vulnerable to a lack of energy. Challenging this view, we here show in vivo that loss of the Drosophila carnitine palmitoyltransferase 2 (CPT2), an enzyme required for mitochondrial β-oxidation of long-chain fatty acids as substrates for energy production, results in the accumulation of triacylglyceride-filled lipid droplets in adult Drosophila brain but not in obesity. CPT2 rescue in glial cells alone is sufficient to restore triacylglyceride homeostasis, and we suggest that this is mediated by the release of ketone bodies from the rescued glial cells. These results demonstrate that the adult brain is able to catabolize fatty acids for cellular energy production.This work was partially supported by the Flanders Fund for Scientific Research (FWO G 0.666.10N), NEUROBRAINNET IAP 7/16, Flemish Government Methusalem Grant, Spanish Ministry of Science (SAF2010-14906) and Innovation Ingenio-Consolider (CSD2010-00045) and Spanish Ministry of Economy and Competitiveness (SAF2013-45392).Peer Reviewe
Glial β-Oxidation regulates drosophila energy metabolism
The brain's impotence to utilize long-chain fatty acids as fuel, one of the dogmas in neuroscience, is surprising, since the nervous system is the tissue most energy consuming and most vulnerable to a lack of energy. Challenging this view, we here show in vivo that loss of the Drosophila carnitine palmitoyltransferase 2 (CPT2), an enzyme required for mitochondrial β-oxidation of long-chain fatty acids as substrates for energy production, results in the accumulation of triacylglyceride-filled lipid droplets in adult Drosophila brain but not in obesity. CPT2 rescue in glial cells alone is sufficient to restore triacylglyceride homeostasis, and we suggest that this is mediated by the release of ketone bodies from the rescued glial cells. These results demonstrate that the adult brain is able to catabolize fatty acids for cellular energy production.This work was partially supported by the Flanders Fund for Scientific Research (FWO G 0.666.10N), NEUROBRAINNET IAP 7/16, Flemish Government Methusalem Grant, Spanish Ministry of Science (SAF2010-14906) and Innovation Ingenio-Consolider (CSD2010-00045) and Spanish Ministry of Economy and Competitiveness (SAF2013-45392).Peer Reviewe
Weak Lensing of the CMB by Large-Scale Structure
Several recent papers have studied lensing of the CMB by large-scale
structures, which probes the projected matter distribution from to
. This interest is motivated in part by upcoming high resolution,
high sensitivity CMB experiments, such as APEX/SZ, ACT, SPT or Planck, which
should be sensitive to lensing. In this paper we examine the reconstruction of
the large-scale dark matter distribution from lensed CMB temperature
anisotropies. We go beyond previous work in using numerical simulations to
include higher order, non-Gaussian effects and study how well the quadratic
estimator of \cite{Hu01a} is able to recover the input field. We also study
contamination by kinetic Sunyaev-Zel'dovich signals, which is spectrally
indistinguishable from lensed CMB anisotropies. We finish by estimating the
sensitivity of the previously cited experiments.Comment: 26 pages, 13 figures, replaced to match the minor revisions of the
accepted versio
Unified analysis of terminal-time control in classical and quantum systems
Many phenomena in physics, chemistry, and biology involve seeking an optimal
control to maximize an objective for a classical or quantum system which is
open and interacting with its environment. The complexity of finding an optimal
control for maximizing an objective is strongly affected by the possible
existence of sub-optimal maxima. Within a unified framework under specified
conditions, control objectives for maximizing at a terminal time physical
observables of open classical and quantum systems are shown to be inherently
free of sub-optimal maxima. This attractive feature is of central importance
for enabling the discovery of controls in a seamless fashion in a wide range of
phenomena transcending the quantum and classical regimes.Comment: 10 page
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