31,071 research outputs found
Exercises to develop skill in map reading in grade four
Thesis (Ed.M.)--Boston Universit
Moving English forward : action to raise standards in English
"This report sets out to answer the question: how can attainment in English be raised in order to move English forward in schools? It is recommended to all who teach the subject, those who lead the subject, and headteachers of primary and secondary schools. The findings are based principally on evidence from inspections of English between April 2008 and March 2011 in 268 maintained schools in England. Part A highlights the main strengths and weaknesses in English and presents the evidence from the survey inspection visits. Part B draws on this inspection evidence to analyse 10 areas of weakness and recommend appropriate action to improve practice in each area" - front cover
Motions about a fixed point by hypergeometric functions: new non-complex analytical solutions and integration of the herpolhode
We study four problems in the dynamics of a body moving about a fixed point,
providing a non-complex, analytical solution for all of them. For the first
two, we will work on the motion first integrals. For the symmetrical heavy
body, that is the Lagrange-Poisson case, we compute the second and third Euler
angles in explicit and real forms by means of multiple hypergeometric functions
(Lauricella, functions). Releasing the weight load but adding the complication
of the asymmetry, by means of elliptic integrals of third kind, we provide the
precession angle completing some previous treatments of the Euler-Poinsot case.
Integrating then the relevant differential equation, we reach the finite polar
equation of a special trajectory named the {\it herpolhode}. In the last
problem we keep the symmetry of the first problem, but without the weight, and
take into account a viscous dissipation. The approach of first integrals is no
longer practicable in this situation and the Euler equations are faced directly
leading to dumped goniometric functions obtained as particular occurrences of
Bessel functions of order .Comment: This is a pre-print of an article published in Celestial Mechanics
and Dynamical Astronomy. The final authenticated version is available online
at: DOI: 10.1007/s10569-018-9837-
Indeterminateness and `The' Universe of Sets: Multiversism, Potentialism, and Pluralism
In this article, I survey some philosophical attitudes to talk concerning `the' universe of sets. I separate out four different strands of the debate, namely: (i) Universism, (ii) Multiversism, (iii) Potentialism, and (iv) Pluralism. I discuss standard arguments and counterarguments concerning the positions and some of the natural mathematical programmes that are suggested by the various views
Utilitarianism and Economic Behavior. Looking for Benthamite Traces
In spite of the use of a utilitarian language in Rational Choice Theory, economists do not acknowledge any link to this current of moral philosophy, and have made great efforts to rid economics from its legacy. In this document we aim at assessing these efforts retracing their history from Pareto to Samuelson in order to determine how close they came to their ideal of formulating a positive science rid of what they called any metaphysical traces.Utilitarianism, Rational Choice Theory, Axiom of Revealed Preferences
The transfer of resonance line polarization with partial frequency redistribution and J-state interference
The linear polarization signals produced by scattering processes in strong
resonance lines are rich in information on the magnetic and thermal structure
of the chromosphere and transition region of the Sun and of other stars. A
correct modeling of these signals requires accounting for partial frequency
redistribution effects, as well as for the impact of quantum interference
between different fine structure levels (J-state interference). In this paper,
we present a theoretical approach suitable for modeling the transfer of
resonance line polarization when taking these effects into account, along with
an accurate numerical method of solution of the problem's equations. We
consider a two-term atom with unpolarized lower term and infinitely sharp lower
levels, in the absence of magnetic fields. We show that by making simple formal
substitutions on the quantum numbers, the theoretical approach derived here for
a two-term atom can also be applied to describe a two-level atom with hyperfine
structure. An illustrative application to the MgII doublet around 2800A is
presented.Comment: Accepted for publication in Astronomy & Astrophysic
Gender Difference in Situation Awareness when Receiving Wayfinding Direction by Landmarks and Headings
In aviation, situation awareness (SA) is a fundamental requirement for effective flying and air traffic control. This skill has greatly been associated with pilot and air traffic controller performance. Previous studies in aviation and other fields have shown that gender differences exist in SA performance. Four hypotheses were tested in this study: women navigate better from landmark cues; men navigate better from headings cues; women have better SA performance than men when receiving landmark directions; and men have better SA when receiving cardinal directions. Thirty-eight participants drove a driving simulator twice. While driving, participants were asked SA questions to assess their SA performances. The results showed participants navigate better from landmark cues regardless of gender. Men showed poorer SA in landmark conditions than in headings conditions, but there was no significant difference in women. However, overall, women performed worse in response time to answering SA questions. This study can be beneficial for pilotsâ selection tests and providing special training for male and female pilots
Valuing Biodiversity in Life Cycle Impact Assessment
Erratum published on 13 March 2020, see Sustainability 2020, 12(6), 2270. https://doi.org/10.3390/su11205628In this article, the authors propose an impact assessment method for life cycle assessment (LCA) that adheres to established LCA principles for land use-related impact assessment, bridges current research gaps and addresses the requirements of different stakeholders for a methodological framework. The conservation of biodiversity is a priority for humanity, as expressed in the framework of the Sustainable Development Goals (SDGs). Addressing biodiversity across value chains is a key challenge for enabling sustainable production pathways. Life cycle assessment is a standardised approach to assess and compare environmental impacts of products along their value chains. The impact assessment method presented in this article allows the quantification of the impact of land-using production processes on biodiversity for several broad land use classes. It provides a calculation framework with degrees of customisation (e.g., to take into account regional conservation priorities), but also offers a default valuation of biodiversity based on naturalness. The applicability of the method is demonstrated through an example of a consumer product. The main strength of the approach is that it yields highly aggregated information on the biodiversity impacts of products, enabling biodiversity-conscious decisions about raw materials, production routes and end user products
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