896 research outputs found
Control of potato late blight by caraway oil in organic farming
Caraway (Carum carvi) seeds contain biologically active essential oils, which have shown potential in controlling Phytophthora infestans (P.i.). An attempt is being made to develop a P.i. control strategy for organic farming based on caraway oil
Education Provision for Indigenous and Minority Heritage Languages Revitalisation: A Study Focusing on Saami and Scottish Gaelic
This chapter provides a comparative study of education provision for the Indigenous language of Saami and the minority heritage of Scottish Gaelic. Due to historical factors, both languages are considered endangered according to UNESCO listings. Whilst North Saami and Scottish Gaelic receive government support, which would appear to be providing a reasonably stable position at least within their geographically core areas, assimilation continues resulting in the overall numbers of speakers remaining small. As education is viewed as key to the promotion of both languages, following an introduction to the background historical and societal context of both language contexts, the chapter presents educational practices and challenges in education for comparison over the past forty years. The comparative study highlights that similarities between these two languages exist in language revitalisation efforts to reverse language shift but the forms vary. The chapter concludes with some emerging recommendations for the successful maintenance and revitalisation of minority heritage and Indigenous languages in the twenty-first century despite the continued dominance of surrounding majority languages
The Expedition to the Peel River in 2019: Fluvial Transport Across a Permafrost Landscape
The Expedition to the Peel River in 2019: Fluvial Transport Across a Permafrost Landscape EU Horizon2020 project, Nunataryuk. Consisting of 7 legs from 16 June 2019 - 11 August 2019
Planck early results XIX : All-sky temperature and dust optical depth from Planck and IRAS. Constraints on the “dark gas” in our Galaxy
Peer reviewe
Planck early results XIII : Statistical properties of extragalactic radio sources in the Planck Early Release Compact Source Catalogue
Peer reviewe
Non-Gaussianity from isocurvature perturbations
We develop a formalism to study non-Gaussianity in both curvature and
isocurvature perturbations. It is shown that non-Gaussianity in the
isocurvature perturbation between dark matter and photons leaves distinct
signatures in the CMB temperature fluctuations, which may be confirmed in
future experiments, or possibly, even in the currently available observational
data. As an explicit example, we consider the QCD axion and show that it can
actually induce sizable non-Gaussianity for the inflationary scale, H_{inf} =
O(10^9 - 10^{11})GeV.Comment: 24 pages, 6 figures; references added; version to appear in JCA
Development and characterization of the readout system for POLARBEAR-2
POLARBEAR-2 is a next-generation receiver for precision measurements of the
polarization of the cosmic microwave background (Cosmic Microwave Background
(CMB)). Scheduled to deploy in early 2015, it will observe alongside the
existing POLARBEAR-1 receiver, on a new telescope in the Simons Array on Cerro
Toco in the Atacama desert of Chile. For increased sensitivity, it will feature
a larger area focal plane, with a total of 7,588 polarization sensitive
antenna-coupled Transition Edge Sensor (TES) bolometers, with a design
sensitivity of 4.1 uKrt(s). The focal plane will be cooled to 250 milliKelvin,
and the bolometers will be read-out with 40x frequency domain multiplexing,
with 36 optical bolometers on a single SQUID amplifier, along with 2 dark
bolometers and 2 calibration resistors. To increase the multiplexing factor
from 8x for POLARBEAR-1 to 40x for POLARBEAR-2 requires additional bandwidth
for SQUID readout and well-defined frequency channel spacing. Extending to
these higher frequencies requires new components and design for the LC filters
which define channel spacing. The LC filters are cold resonant circuits with an
inductor and capacitor in series with each bolometer, and stray inductance in
the wiring and equivalent series resistance from the capacitors can affect
bolometer operation. We present results from characterizing these new readout
components. Integration of the readout system is being done first on a small
scale, to ensure that the readout system does not affect bolometer sensitivity
or stability, and to validate the overall system before expansion into the full
receiver. We present the status of readout integration, and the initial results
and status of components for the full array.Comment: Presented at SPIE Astronomical Telescopes and Instrumentation 2014:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for
Astronomy VII. Published in Proceedings of SPIE Volume 915
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