Browsing Faculty of Mathematics and Natural Sciences by Title
Now showing items 6276-6295 of 9935
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Observation of the boson peak in a two-dimensional material
(Journal article; Peer reviewed, 2023)The boson peak is an excess in the phonon vibrational density of states relative to the Debye model. It has been observed in a wide range of amorphous materials, from inorganic glasses to polymers. Two-dimensional random ... -
Observation of the decay D0→K−π+e+e−
(Peer reviewed; Journal article, 2019) -
Observation of the Gamma-Ray Binary HESS J0632+057 with the H.E.S.S., MAGIC, and VERITAS Telescopes
(Journal article; Peer reviewed, 2021)The results of gamma-ray observations of the binary system HESS J0632 + 057 collected during 450 hr over 15 yr, between 2004 and 2019, are presented. Data taken with the atmospheric Cherenkov telescopes H.E.S.S., MAGIC, ... -
Observation of WWW production in pp collisions at √s=13 TeV with the ATLAS detector
(Journal article; Peer reviewed, 2022)This Letter reports the observation of WWW production and a measurement of its cross section using 139 fb−1 of proton-proton collision data recorded at a center-of-mass energy of 13 TeV by the ATLAS detector at the Large ... -
Observation on the survival of Francisella noatunensis in water and in blue mussel (Mytilus edulis)
(Master thesis, 2009-06-09)Francisellosis was discovered in farmed Atlantic cod (Gadus morhua) in the western parts of Norway in 2004. The bacterium Francisella noatunensis was identified as the causative agent. Today, francisellosis is known as one ... -
Observational and Model Impact of Tonga Volcano Eruption on Schumann Resonance
(Journal article; Peer reviewed, 2023)Tonga volcano eruption on 15 January 2022 was accompanied by an unprecedentedly high lightning activity in the volcano plume which significantly exceeded the lightning activity level of the whole globe. We compare model ... -
Observational evidence for on-shelf heat transport driven by dense water export in the Weddell Sea
(Journal article; Peer reviewed, 2023)The transport of oceanic heat towards the Antarctic continental margin is central to the mass balance of the Antarctic Ice Sheet. Recent modeling efforts challenge our view on where and how the on-shelf heat flux occurs, ... -
Observational evidence for throat aurora being associated with magnetopause reconnection
(Peer reviewed; Journal article, 2019)Throat auroras have been suggested to be related to indentations on the subsolar magnetopause. However, the indentation generation process and the resulting ionospheric responses have remained unknown. An EISCAT Svalbard ... -
Observational Evidence of Magnetic Reconnection in the Terrestrial Bow Shock Transition Region
(Journal article; Peer reviewed, 2019)We report evidence of magnetic reconnection in the transition region of the Earth's bow shock when the angle between the shock normal and the immediate upstream magnetic field is 65°. An ion‐skin‐depth‐scale current sheet ... -
Observational validation of the diffusive convection flux laws in the Amundsen Basin, Arctic Ocean
(Peer reviewed; Journal article, 2015-12)The low levels of mechanically driven mixing in many regions of the Arctic Ocean make double diffusive convection virtually the only mechanism for moving heat up from the core of Atlantic Water towards the surface. In an ... -
Observations of Asymmetric Lobe Convection for Weak and Strong Tail Activity
(Journal article; Peer reviewed, 2019)In this study we use high‐quality convection data from the Electron Drift Instrument on board Cluster to investigate how near‐Earth tail activity affects the average convection pattern in the magnetotail lobes when the ... -
Observations of asymmetries in ionospheric return flow during different levels of geomagnetic activity
(Peer reviewed; Journal article, 2018-06)It is known that the magnetic field of the Earth's closed magnetosphere can be highly displaced from the quiet‐day configuration when interacting with the interplanetary magnetic field (IMF), an asymmetry largely controlled ... -
Observations of barotropic oscillations and their influence on mixing in the Faroe bank channel overflow region
(Peer reviewed; Journal article, 2013)Observations of hydrography, currents, and microstructure are presented together with sea surface height (SSH) patterns from concurrent satellite tracks to describe the subinertial oscillations in the region downstream of ... -
Observations of Blue Corona Discharges in Thunderclouds
(Journal article; Peer reviewed, 2022)Blue electric streamer discharges in the upper reaches of thunderclouds are observed as flashes of 337.0 nm (blue) with faint or no emissions of 777.4 nm (red). Analyzing 3 years of measurements by the Atmosphere-Space ... -
Observations of bridge stay cable vibrations in dry and wet conditions: A case study
(Journal article; Peer reviewed, 2021-04-01)The characteristics of wind- and rain-wind-induced vibrations of bridge stay cables are studied by using ambient vibrations records acquired on a cable-stayed bridge. Mean wind speed and wind-cable angle, as well as the ... -
Observations of brine plumes below Arctic sea ice
(Journal article, 2017)In sea ice, interconnected pockets and channels of brine are surrounded by fresh ice. Over time, brine is lost by gravity drainage and flushing. The timing of salt release and its interaction with the underlying water can ... -
Observations of Electron Precipitation During Pulsating Aurora and Its Chemical Impact
(Journal article; Peer reviewed, 2020)Pulsating auroras (PsAs) are low‐intensity diffuse aurora, which switch on and off with a quasiperiodic oscillation period from a few seconds to ∼10 s. They are predominantly observed after magnetic midnight, during the ... -
Observations of energetic turbulence on the Weddell Sea continental slope
(Peer reviewed; Journal article, 2016-01-23)Turbulence profile measurements made on the upper continental slope and shelf of the southeastern Weddell Sea reveal striking contrasts in dissipation and mixing rates between the two sites. The mean profiles of dissipation ... -
Observations of highly regular oscillations in the overflow plume downstream of the Faroe Bank Channel
(Peer reviewed; Journal article, 2006-12-23)The Faroe Bank Channel (FBC) is the deepest connection between the Atlantic Ocean and the Nordic Seas. This work describes the dynamic properties of the plume of dense overflow water descending from the Faroe Bank Channel ...