67,358 research outputs found
Recommended from our members
The Top Triangle Moose
We introduce a deconstructed model that incorporates both Higgsless and
top-color mechanisms. The model alleviates the typical tension in Higgsless
models between obtaining the correct top quark mass and keeping delta-rho
small. It does so by singling out the top quark mass generation as arising from
a Yukawa coupling to an effective top-Higgs which develops a small vacuum
expectation value, while electroweak symmetry breaking results largely from a
Higgsless mechanism. As a result, the heavy partners of the SM fermions can be
light enough to be seen at the LHC
Recommended from our members
Understanding structure of concurrent actions
Whereas most work in reinforcement learning (RL) ignores the structure or relationships between actions, in this paper we show that exploiting structure in the action space can improve sample efficiency during exploration. To show this we focus on concurrent action spaces where the RL agent selects multiple actions per timestep. Concurrent action spaces are challenging to learn in especially if the number of actions is large as this can lead to a combinatorial explosion of the action space.
This paper proposes two methods: a first approach uses implicit structure to perform high-level action elimination using task-invariant actions; a second approach looks for more explicit structure in the form of action clusters. Both methods are context-free, focusing only on an analysis of the action space and show a significant improvement in policy convergence times
Recommended from our members
Topcolor in the LHC Era
Ongoing LHC searches for the standard model Higgs Boson in WW or ZZ decay
modes strongly constrain the top-Higgs state predicted in many models with new
dynamics that preferentially affects top quarks. Such a state couples strongly
to top-quarks, and is therefore produced through gluon fusion at a rate that
can be greatly enhanced relative to the rate for the standard model Higgs
boson. As we discuss in this talk, a top-Higgs state with mass less than 300
GeV is excluded at 95% CL if the associated top-pion has a mass of 150 GeV, and
the constraint is even stronger if the mass of the top-pion state exceeds the
top-quark mass or if the top-pion decay constant is a substantial fraction of
the weak scale. These results have significant implications for theories with
strong top dynamics, such as topcolor-assisted technicolor, top-seesaw models,
and certain Higgsless models
True Neutrality as a New Type of Flavour
A classification of leptonic currents with respect to C-operation requires
the separation of elementary particles into the two classes of vector C-even
and axial-vector C-odd character. Their nature has been created so that to each
type of lepton corresponds a kind of neutrino. Such pairs are united in
families of a different C-parity. Unlike the neutrino of a vector type, any
C-noninvariant Dirac neutrino must have his Majorana neutrino. They constitute
the purely neutrino families. We discuss the nature of a corresponding
mechanism responsible for the availability in all types of axial-vector
particles of a kind of flavour which distinguishes each of them from others by
a true charge characterized by a quantum number conserved at the interactions
between the C-odd fermion and the field of emission of the corresponding types
of gauge bosons. This regularity expresses the unidenticality of truly neutral
neutrino and antineutrino, confirming that an internal symmetry of a
C-noninvariant particle is described by an axial-vector space. Thereby, a true
flavour together with the earlier known lepton flavour predicts the existence
of leptonic strings and their birth in single and double beta decays as a unity
of flavour and gauge symmetry laws. Such a unified principle explains the
availability of a flavour symmetrical mode of neutrino oscillations.Comment: 19 pages, LaTex, Published version in IJT
Determination of the Gyrotropic Characteristics of Hexaferrite Ceramics From 75 to 600 GHz
(c) 2010 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works
Extended conjugated microporous polymers for photocatalytic hydrogen evolution from water
Conjugated microporous polymers (CMPs) have been used as photocatalysts for hydrogen production from water in the presence of a sacrificial electron donor. The relative importance of the linker geometry, the co-monomer linker length, and the degree of planarisation were studied with respect to the photocatalytic hydrogen evolution rate
Proposal for a Performance Dashboard for the Monitoringof Water and Sewage Service Companies (WaSCs)
The water and sewage industry provides an essential service to the community, but it is characterized by natural monopoly tendencies of service suppliers. In this framework, it is very important to assist regulators with a small set of critical indicators (performance dashboard) for the evaluation and monitoring of the service provided by Water and Sewage Companies (WaSCs). The paper originates from the analysis of situation of Piemonte (Italy), where each regional and local body adopts a proprietary Performance Measurement System (PMS). In order to improve the coordination of information flow and to support the definition of common service standards, a methodology to merge existing PMSs and define a unique shared reference system is proposed. The Kaplan and Norton's Balanced Scorecard (BSC) is adopted as the reference model of this approach. BSC is widely recognized to be an exhaustive and balanced framework in describing the performances of an organization and ensures that all the operational aspects of WaSCs are adequately monitored. The output of the proposed procedure is a general performance dashboard for the monitoring of WaSCs. The dashboard is shown and some remarks about indicators properties are developed. In particular, this analysis highlights some common pitfalls originated by a ârushed' aggregation of several performance indicators. Description is supported by several example
Questions on uncertainties in parton distributions
A discussion is presented of the manner in which uncertainties in parton distributions
and related quantities are determined. One of the central problems
is the criteria used to judge what variation of the parameters describing a set
of partons is acceptable within the context of a global fit. Various ways of
addressing this question are outlined
Optimisation du dimensionnement des systĂšmes photovoltaĂŻques, amĂ©lioration de leur rendement Ă©nergĂ©tique Ă travers des nouvelles techniques dâinstallation
Le sujet que nous traitons dans cet article est une comparaison de lâĂ©nergie reçue par des photovoltaĂŻques (PV) sur deux installations diffĂ©rentes. Nous rĂ©alisons deux installations de supports de panneau solaire ; lâun est mobile et capable de se tourner dans deux directions diffĂ©rentes ; et lâautre est fixĂ© et orientĂ© selon une seule direction. A Antsiranana, le soleil passe au Nord environ huit (08) mois sur douze (12). Câest la raison pour laquelle lâinstallation du support fixe de panneau solaire est orientĂ©e vers le Nord. Toutefois, cette technique prĂ©sente un faible rendement lorsque le soleil passe au Sud. Ainsi, lâidĂ©e de rendre mobile le support est envisagĂ© pour palier Ă cet inconvĂ©nient. Le nouveau support peut sâorienter suivant lâEst-ouest et Nord-sud ou vis-versa. Ces orientations sont gĂ©rĂ©es par un module Ă©lectronique programmable. En relevant les rĂ©sultats des mesures obtenus sur les deux installations, nous remarquons une nette amĂ©lioration du rendement pour le support mobile. Ce dernier prĂ©sent de rendement minimum de plus de 5% au mauvais temps et de 18% au temps ensoleillĂ© par rapport Ă celle du support fixe.Mots-clĂ©s: capteur de lumiĂšre, support Mobile, microcontrĂŽleur Atmega8, Ă©nergie solaire. Optimization of the design of photovoltaic systems, improve their energy efficiency through new installationThis paper is treated a comparison of the energy received by solar panels using two different installations. We realize two stands for solar panel; the first one is able to turn following different directions; and the other is fixed and which is oriented at a single angle. In Antsiranana, the sun spends in the north about 08 months. That is the reason why the supports of photovoltaic panels are oriented to the north. However, this technique presents a low yield when the sun goes south. So the idea to make mobile the support have been realized to overcome this inconvenient. The new support can move along the East-West and North-South or vice-versa. These guidelines are managed by a programmable electronic module. Noting the results of measurements on the two facilities, we notice a significant improvement in performance for mobile support. Compared to the fixed support, the mobile panel provides minimum yield for about 5% high in bad weather and 18% more for the sunny.Keywords: light sensor, mobile support, microcontroller Atmega8, solar energy
- âŠ