3,158 research outputs found
The Steiner-Lehmus theorem and "triangles with congruent medians are isosceles" hold in weak geometries
We prove that (i) a generalization of the Steiner-Lehmus theorem due to A.
Henderson holds in Bachmann's standard ordered metric planes, (ii) that a
variant of Steiner-Lehmus holds in all metric planes, and (iii) that the fact
that a triangle with two congruent medians is isosceles holds in Hjelmslev
planes without double incidences of characteristic
Profit Limitation Controls Prior to the Present War
In March 2014, four organisations, the Global School (Den Globala Skolan), the Swedish International Centre of Education for Sustainable Development (SWEDESD) at Uppsala University, the Swedish National Commission for UNESCO (Svenska Unescorådet) and WWF-Sweden commissioned Anders Jidesjö, senior lecturer and researcher at Linköping University, to undertake a study of the Swedish experience in the domain of Education for Sustainable Development (ESD) over the last 10 years by analysing relevant background documentation and reports as well as information gathered through interviews with key informants. This report presents the result of this study. An earlier version served as background document for the "ESD – Call for Action" event on 3 June 2014 (see also below). The current version has benefited from incorporating factual information and insights presented during that event. The report was commissioned in view of the UNESCO World Conference on Education for Sustainable Development, scheduled for 11-12 November in Aichi-Nagoya, Japan. This conference will mark the end of the UN Decade on Education for Sustainable Development, 2005-2014. The four organisations considered that the official Swedish position at the Nagoya Conference would be strengthened if informed by the experiences and insights of Swedish pre-schools, schools, universities, municipalities and public, private and non-governmental organizations that over the last ten years and longer have engaged in education and learning for sustainable development. The official Swedish position would also be bolstered by having politicians, policy makers and experts reflect on these experiences and formulate recommendations for reinforced policy and accelerated and effective practice and research in the ESD domain. To this effect, the four organizations organized the event "ESD – Call for Action", on 3 June at Blåsenhus, Uppsala University. It brought together 120 representatives of Swedish ESD-related practitioners, researchers and policy makers who together formulated an extensive set of recommendations that are meant to support the Swedish delegation attending the Nagoya Conference. The report and the 3 June recommendations will be made available to the participants of a second event "Making ESD Action Possible", scheduled for 27 August, 2014 at Rosenbad Conference Centre, Stockholm. This event is expected to assemble 140 Swedish ESD-related politicians, policy makers, researchers and practitioners. The combined recommendations formulated by the participants during the two events will be submitted to the official Swedish delegation to the Nagoya Conference. August 2014 Den Globala Skolan (the Global School), Svenska Unescorådet (Swedish National Commission for UNESCO), Swedish International Centre of Education for Sustainable Development (SWEDESD) at Uppsala University, WWF-Swede
Classical radio source propagating into outer HI disc in NGC 3801
We present observations of a large-scale disc of neutral hydrogen (HI) in the
nearby Fanaroff & Riley type-I radio galaxy NGC 3801 with the Westerbork
Synthesis Radio Telescope. The HI disc (34 kpc in diameter and with M_HI = 1.3
x 10^9 M_sun) is aligned with the radio jet axis. This makes NGC 3801 an ideal
system for investigating the evolution of a small radio source through its host
galaxy's cold ISM. The large-scale HI disc is perpendicular to a known inner CO
disc and dust-lane. We argue that the formation history of the large-scale HI
disc is in agreement with earlier speculation that NGC 3801 was involved in a
past gas-rich galaxy-galaxy merger (although other formation histories are
discussed). The fact that NGC 3801 is located in an environment of several
HI-rich companions, and shows indications of ongoing interaction with the
nearby companion NGC 3802, strengthens this possibility. The large amounts of
ambient cold ISM, combined with X-ray results by Croston et al (2007) on the
presence of over-pressured radio jets and evidence for an obscuring torus, are
properties that are generally not, or no longer, associated with more evolved
FR-I radio sources. We do show, however, that the HI properties of NGC 3801 are
comparable to those of a significant fraction of nearby low-power compact radio
sources, suggesting that studies of NGC 3801 may reveal important insight into
a more general phase in the evolution of at least a significant fraction of
nearby radio galaxies.Comment: Accepted for publication in MNRAS (6 figure, 2 tables
Circumnuclear HI disks in radio galaxies: The case of Cen A and B2 0258+35
New HI observations of the nearby radio-loud galaxies Centaurus A and B2
0258+35 show broad absorption (Delta_v=400km/s) against the unresolved nuclei.
Both sources belong to the cases where blue- and redshifted absorption is
observed at the same time. In previous Cen A observations only a relative
narrow range of redshifted absorption was detected. We show that the data
suggest in both cases the existence of a circumnuclear disk. For Cen A the
nuclear absorption might be the atomic counterpart of the molecular
circumnuclear disk that is seen in CO and H_2. Higher resolution observations
are now needed to locate the absorption and to further investigate the
structure and kinematics of the central region of the AGN and the way the AGN
are fueled.Comment: Talk given at "The Central Kiloparsec: Active Galactic Nuclei and
Their Hosts", Ierapetra, Crete, 4-6 June, 2008. To appear in Volume 79 of the
Memorie della Societa Astronomica Italiana. 4 pages, 2 figure
The logic of the CAP: Politics or Economics?
Distorted incentives, agricultural and trade policy reforms, national agricultural development, Agricultural and Food Policy, International Relations/Trade, F13, F14, Q17, Q18,
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