131,049 research outputs found
The Fundamental Concepts of Classical Equilibrium Statistical Mechanics
A critical examination of some basic conceptual issues in classical
statistical mechanics is attempted, with a view to understanding the origins,
structure and statuts of that discipline. Due attention is given to the
interplay between physical and mathematical aspects, particularly regarding the
role of probability theory. The focus is on the equilibrium case, which is
currently better understood, serving also as a prelude for a further discussion
of non-equilibrium statistical mechanics.Comment: 33 pages, overview, conceptual discussio
Generalised Decision Level Ensemble Method for Classifying Multi-media Data
In recent decades, multimedia data have been commonly generated and used in various domains, such as in healthcare and social media due to their ability of capturing rich information. But as they are unstructured and separated, how to fuse and integrate multimedia datasets and then learn from them eectively have been a main challenge to machine learning. We present a novel generalised decision level ensemble method (GDLEM) that combines the multimedia datasets at decision level. After extracting features from each of multimedia datasets separately, the method trains models independently on each media dataset and then employs a generalised selection function to choose the appropriate models to construct a heterogeneous ensemble. The selection function is dened as a weighted combination of two criteria: the accuracy of individual models and the diversity among the models. The framework is tested on multimedia data and compared with other heterogeneous ensembles. The results show that the GDLEM is more exible and eective
Thermodynamic Limit in Statistical Physics
The thermodynamic limit in statistical thermodynamics of many-particle
systems is an important but often overlooked issue in the various applied
studies of condensed matter physics. To settle this issue, we review tersely
the past and present disposition of thermodynamic limiting procedure in the
structure of the contemporary statistical mechanics and our current
understanding of this problem. We pick out the ingenious approach by N. N.
Bogoliubov, who developed a general formalism for establishing of the limiting
distribution functions in the form of formal series in powers of the density.
In that study he outlined the method of justification of the thermodynamic
limit when he derived the generalized Boltzmann equations. To enrich and to
weave our discussion, we take this opportunity to give a brief survey of the
closely related problems, such as the equipartition of energy and the
equivalence and nonequivalence of statistical ensembles. The validity of the
equipartition of energy permits one to decide what are the boundaries of
applicability of statistical mechanics. The major aim of this work is to
provide a better qualitative understanding of the physical significance of the
thermodynamic limit in modern statistical physics of the infinite and "small"
many-particle systems.Comment: 28 pages, Refs.180. arXiv admin note: text overlap with
arXiv:1011.2981, arXiv:0812.0943 by other author
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The Psy-Security-Curriculum ensemble: British Values curriculum policy in English schools
Framed as being in response to terrorist attacks and concerns about religious bias in some English schools, ‘British Values’ (BV) curriculum policy forms part of the British Government’s Counter-Terrorism and Security Act, 2015. This includes a Duty on teachers in England to actively promote British Values to deter students from radicalisation. This paper, first, traces the history of Britishness in the curriculum to reveal a prevalence of nationalistic, colonial values. Next, an ensemble of recent policies and speeches focusing on British Values is analysed, using a psycho-political approach informed by anti-colonial scholarship. Finally, we interrogate two key critiques of the British Values curriculum discourse: the universality of British Values globally, and concerns over the securitisation of education. Findings indicate that the constitution of white British supremacist subjectivities operate through curriculum as a defence mechanism against perceived threats to white privilege, by normalising a racialised state-controlled social order. The focus is on ‘British’ values, but the analytic framework and findings have wider global significance
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