893 research outputs found
Reaching Fathers in Parent Education: Perceptions of Newsletter Value Among Fathers and Father Figures
Does parent education pay attention to fathers and their perceptions of educational resources? Not often enough. The NDSU Extension Service developed a parenting newsletter for fathers of young children--Father Times. Findings focused on how fathers of children in kindergarten perceive and value the newsletter as a resource. Results showed that fathers: (1) appreciated the layout, readability, and usefulness of the newsletter; (2) valued the newsletter more highly than other formal sources of information; and (3) indicated the features and topics most valuable to them. A newsletter for fathers can be a unique resource for reaching fathers in parent education
The liquid helix
From everyday experience, we all know that a solid edge can deflect a liquid
flowing over it significantly, up to the point where the liquid completely
sticks to the solid. Although important in pouring, printing and extrusion
processes, there is no predictive model of this so-called "teapot effect". By
grazing vertical cylinders with inclined capillary liquid jets, we here use the
teapot effect to attach the jet to the solid and form a new structure: the
liquid helix. Using mass and momentum conservation along the liquid stream, we
first quantitatively predict the shape of the helix and then provide a
parameter-free inertial-capillary adhesion model for the jet deflection and
critical velocity for helix formation.Comment: Accepted in Physical Review Letters, author versio
The Antares Neutrino Telescope and Multi-Messenger Astronomy
Antares is currently the largest neutrino telescope operating in the Northern
Hemisphere, aiming at the detection of high-energy neutrinos from astrophysical
sources. Such observations would provide important clues about the processes at
work in those sources, and possibly help solve the puzzle of ultra-high energy
cosmic rays. In this context, Antares is developing several programs to improve
its capabilities of revealing possible spatial and/or temporal correlations of
neutrinos with other cosmic messengers: photons, cosmic rays and gravitational
waves. The neutrino telescope and its most recent results are presented,
together with these multi-messenger programs.Comment: 10 pages, 7 figures. Proceedings of the 14th Gravitational Wave Data
Analysis Workshop (GWDAW-14) in Roma - January 26th-29th, 201
The Highest Energy Neutrinos
Measurements of the arrival directions of cosmic rays have not revealed their
sources. High energy neutrino telescopes attempt to resolve the problem by
detecting neutrinos whose directions are not scrambled by magnetic fields. The
key issue is whether the neutrino flux produced in cosmic ray accelerators is
detectable. It is believed that the answer is affirmative, both for the
galactic and extragalactic sources, provided the detector has kilometer-scale
dimensions. We revisit the case for kilometer-scale neutrino detectors in a
model-independent way by focussing on the energetics of the sources. The real
breakthrough though has not been on the theory but on the technology front: the
considerable technical hurdles to build such detectors have been overcome.
Where extragalactic cosmic rays are concerned an alternative method to probe
the accelerators consists in studying the arrival directions of neutrinos
produced in interactions with the microwave background near the source, i.e.
within a GZK radius. Their flux is calculable within large ambiguities but, in
any case, low. It is therefore likely that detectors that are larger yet by
several orders of magnitudes are required. These exploit novel techniques, such
as detecting the secondary radiation at radio wavelengths emitted by neutrino
induced showers.Comment: 16 pages, pdflatex, 7 jpg figures, ICRC style files included.
Highlight talk presented at the 30th International Cosmic Ray Conference,
Merida, Mexico, 200
Search for neutrinos from the tidal disruption events AT2019dsg and AT2019fdr with the ANTARES telescope
The authors acknowledge the financial support of the funding agencies: Centre National de la Recherche Scientifique (CNRS), Commissariat a l'energie atomique et aux energies alternatives (CEA), Commission Europeenne (FEDER fund and Marie Curie Program), Institut Universitaire de France (IUF), LabEx UnivEarthS (ANR-10-LABX-0023 and ANR-18-IDEX-0001), Region Ile-de-France (DIM-ACAV), Region Alsace (contrat CPER), Region Provence-Alpes-Cote d'Azur, Departement du Var and Ville de La Seyne-sur-Mer, France; Bundesministerium fur Bildung und Forschung (BMBF), Germany; Istituto Nazionale di Fisica Nucleare (INFN), Italy; Nederlandse organisatie voor Wetenschappelijk Onderzoek (NWO), the Netherlands; Council of the President of the Russian Federation for young scientists and leading scientific schools supporting grants, Russia; Executive Unit for Financing Higher Education, Research, Development and Innovation (UEFISCDI), Romania; Ministerio de Ciencia e Innovacion (MCI) and Agencia Estatal de Investigacion: Programa Estatal de Generacion de Conocimiento (refs. PGC2018-096663-B-C41, -A-C42, -B-C43, -B-C44) (MCI/FEDER), Severo Ochoa Centre of Excellence and MultiDark Consolider, Junta de Andalucia (ref. SOMM17/6104/UGR and A-FQM-053-UGR18), Generalitat Valenciana: Grisolia (ref. GRISOLIA/2018/119) and GenT (ref. CIDEGENT/2018/034) programs, Spain; Ministry of Higher Education, Scientific Research and Professional Training, Morocco. We also acknowledge the technical support of Ifremer, AIM and Foselev Marine for the sea operation and the CC-IN2P3 for the computing facilities.On October 1, 2019, the IceCube Collaboration detected a muon track neutrino with
high probability of being of astrophysical origin, IC191001A. After a few hours, the tidal
disruption event (TDE) AT2019dsg, observed by the Zwicky Transient Facility (ZTF), was
indicated as the most likely counterpart of the IceCube track. More recently, the followup
campaign of the IceCube alerts by ZTF suggested a second TDE, AT2019fdr, as a
promising counterpart of another IceCube muon track candidate, IC200530A, detected on
May 30, 2020. These are the second and third associations between astrophysical sources
and high-energy neutrinos after the compelling identification of the blazar TXS 0506+056.
Here, the search for ANTARES neutrinos from the directions of AT2019dsg and AT2019fdr
using a time-integrated approach is presented. As no significant evidence for space clustering
is found in the ANTARES data, upper limits on the one-flavour neutrino flux and fluence
are set.Centre National de la Recherche Scientifique (CNRS)French Atomic Energy CommissionCommission Europeenne (FEDER fund and Marie Curie Program)Institut Universitaire de France (IUF)LabEx UnivEarthS ANR-10-LABX-0023
ANR-18-IDEX-0001Region Ile-de-FranceRegion Grand-EstRegion Provence-Alpes-Cote d'AzurFederal Ministry of Education & Research (BMBF)Istituto Nazionale di Fisica Nucleare (INFN)Netherlands Organization for Scientific Research (NWO)Netherlands GovernmentCouncil of the President of the Russian Federation for young scientists and leading scientific schools supporting grants, RussiaConsiliul National al Cercetarii Stiintifice (CNCS)Unitatea Executiva pentru Finantarea Invatamantului Superior, a Cercetarii, Dezvoltarii si Inovarii (UEFISCDI)Spanish GovernmentAgencia Estatal de Investigacion (MCI/FEDER) PGC2018-096663-B-C41
PGC2018-096663-A-C42
PGC2018-096663-B-C43
PGC2018-096663-B-C44Severo Ochoa Centre of Excellence and MultiDark Consolider, Junta de Andalucia SOMM17/6104/UGR
A-FQM-053-UGR18Generalitat Valenciana GRISOLIA/2018/119
CIDEGENT/2018/034Ministry of Higher Education, Scientific Research and Professional Training, Morocc
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