Now showing items 638-657 of 976

• #### Observation of an excited B[± over c] meson state with the ATLAS detector ﻿

(American Physical Society, 2014-11-21)
A search for excited states of the B[± over c] meson is performed using 4.9  fb[superscript −1] of 7 TeV and 19.2  fb[superscript −1] of 8 TeV pp collision data collected by the ATLAS experiment at the LHC. A new state is ...
Journal article
• #### Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector ﻿

(Elsevier, 2018-09-10)
The observation of Higgs boson production in association with a top quark pair (), based on the analysis of proton–proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large ...
Journal article
• #### Observation of intrinsically bright terrestrial gamma ray flashes from the Mediterranean basin ﻿

(AGU Publications, 2015-12-14)
We present three terrestrial gamma ray flashes (TGFs) observed over the Mediterranean basin by the Reuven Ramaty High Energy Solar Spectroscope Imager (RHESSI) satellite. Since the occurrence of these events in the ...
Journal article
• #### Observations of field aligned currents in the plasma sheet. Two kinds of field aligned currents generated during magnetotail convection ﻿

(The University of Bergen, 2009-05-08)
Doctoral thesis
• #### Observations of planetary waves in the mesosphere-lower thermosphere during stratospheric warming events ﻿

(Copernicus PublicationsEuropean Geosciences Union, 2015-05-04)
This study investigates the effect of stratospheric sudden warmings (SSWs) on planetary wave (PW) activity in the mesosphere–lower thermosphere (MLT). PW activity near 95 km is derived from meteor wind data using a chain ...
Journal article
• #### Oh no, it’s raining! A study of how information in online weather reports is interpreted, integrated, and used in everyday decision-making by laypeople ﻿

(The University of Bergen, 2016-11-18)
Different people in different occupations depend on weather forecasts to plan their work and recreational schedules. People with no expertise in meteorology frequently interpret weather forecasts and uncertainty information. ...
Doctoral thesis
• #### On automatic data processing and well-test analysis in real-time reservoir management applications ﻿

(The University of Bergen, 2011-06-30)
Doctoral thesis
• #### On the composite response of the MLT to major sudden stratospheric warming events with elevated stratopause ﻿

(Wiley, 2016-05)
Based on a climate-chemistry model (constrained by reanalyses below ~50 km), the zonal-mean composite response of the mesosphere and lower thermosphere (MLT) to major sudden stratospheric warming events with elevated ...
Journal article
• #### On the contribution of thermal excitation to the total 630.0 nm emissions in the northern cusp ionosphere ﻿

(American Geophysical Union, 2017-01)
Direct impact excitation by precipitating electrons is believed to be the main source of 630.0 nm emissions in the cusp ionosphere. However, this paper investigates a different source, 630.0 emissions caused by thermally ...
Journal article
• #### On the Persistent Shape and Coherence of Pulsating Auroral Patches ﻿

(American Geophysical Union, 2018-05)
The pulsating aurora covers a broad range of fluctuating shapes that are poorly characterized. The purpose of this paper is therefore to provide objective and quantitative measures of the extent to which pulsating auroral ...
Journal article
• #### On the timing between terrestrial gamma ray flashes, radio atmospherics, and optical lightning emission ﻿

(American Geophysical Union, 2017)
On 25 October 2012 the Reuven Ramaty High Energy Solar Spectroscope Imager (RHESSI) and the Tropical Rainfall Measuring Mission (TRMM) satellites passed over a thunderstorm on the coast of Sri Lanka. RHESSI observed a ...
Journal article
• #### On-line X-ray fluorescence analysis applied to industrial processes and environmental monitoring ﻿

(The University of Bergen, 2000)
Abstract X-ray stimulated fluorescence analysis is a powerful and widely used tool for determining the concentration of chemical species in materials. Presently, this is done by taking and preparing samples for off-line ...
Master thesis
• #### One-dimensional pion, kaon, and proton femtoscopy in Pb-Pb collisions at $\sqrt{s_{\rm {NN}}}$ =2.76 TeV ﻿

(American Physical Society, 2015-11)
The size of the particle emission region in high-energy collisions can be deduced using the femtoscopic correlations of particle pairs at low relative momentum. Such correlations arise due to quantum statistics and Coulomb ...
Journal article
• #### Online data compression in the ALICE O$^2$ facility ﻿

(IOP, 2017)
The ALICE Collaboration and the ALICE O2 project have carried out detailed studies for a new online computing facility planned to be deployed for Run 3 of the Large Hadron Collider (LHC) at CERN. Some of the main aspects ...
Journal article
• #### Onset of smoldering and transition to flaming fire ﻿

(The University of Bergen, 2013-06-28)
Aim: The aim of this work has been to investigate the effects of density, heat flux and boundary conditions on smoldering. Two focus areas were chosen: the onset of smoldering and the transition from smoldering to flaming ...
Doctoral thesis
• #### Onset of Spontaneous Imbibition ﻿

(The University of Bergen, 2017-06-22)
The spontaneous imbibition process in porous media is an important recovery mechanism and is governed by capillary forces that arise when two immiscible fluids are present in the pore space. This thesis presents new ...
Master thesis
• #### Optical spectroscopy for tissue diagnostics and treatment control ﻿

(The University of Bergen, 2006-06-28)
Biomedical Optics as an interdisciplinary field of science has been developed during many years and is experiencing tremendous growth, to cover a wide range of optical techniques and methods, utilized for medical therapeutic ...
Doctoral thesis
• #### Optical velocity meter based on Ramsey oscillations in a double-grating setup ﻿

(American Physical Society, 2014-04)
We propose a method for measuring velocities of atoms or molecules in a gas phase based on time-resolved laser experiments. Two intensity gratings of electromagnetic field with variable time delay τ are created by interfering ...
Journal article
• #### Optimization of proton therapy plans with respect to biological and physical dose distributions ﻿

(The University of Bergen, 2018-06-16)
Introduction: Proton therapy is a radiation treatment method growing around the world. This is mainly due to the protons ability to deposit dose more conformal compared to conventional photon therapy. Protons also ...
Master thesis
• #### Optimization, evaluation and application of EEP measurements in the presence of contaminating protons ﻿

(The University of Bergen, 2017)
It is well known that energetic particles can penetrate deep into the atmosphere and initiate a chain of chemical reactions, ultimately leading to enhanced production rates of HOx and NOx molecules and the depletion of ...
Master thesis