Now showing items 598-617 of 891

• 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 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
• Optisk goniometer for optimalisering av retningsbestemt solenergi ﻿

(The University of Bergen, 2017-06-13)
Det er et økende fokus på fornybar energi og bærekraftig matproduksjon, det vil derfor være nyttig med teknologi som kan føre til økt effektivitet i produksjon av dette. Utnyttelse av solenergi er et felt som er mye brukt, ...
Master thesis
• Overview of solar wind - magnetosphere - ionosphere - atmosphere coupling and the generation of magnetospheric currents ﻿

(Springer, 2017-03)
We review the morphology and dynamics of the electrical current systems of the terrestrial magnetosphere and ionosphere. Observations from the Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE) ...
Journal article
• Particle Production in p+p and d+Au Collisions at √sNN = 200 GeV ﻿

(The University of Bergen, 2007-12-14)
Doctoral thesis
• Particle size distribution of methane hydrates and particle growth using a CFD-PBM model ﻿

(The University of Bergen, 2018-08-30)
Gas hydrates are solid crystalline compounds that contain water and gas molecules, and can be considered to be a natural occurring phenomena located in enormous amounts around the world. Particle growth and agglomeration ...
Master thesis
• Particle-yield modification in jet-like azimuthal dihadron correlations in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV ﻿

(American Physical Society, 2012-03)
The yield of charged particles associated with high-pT trigger particles (8 < pT < 15 GeV/c) is measured with the ALICE detector in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV relative to proton-proton collisions at the ...
Journal article
• Particle–wave discrimination in Poisson spot experiments ﻿

(IOP Publishing Ltd, 2011)
Matter–wave interferometry has been used extensively over the last few years to demonstrate the quantum-mechanical wave nature of increasingly larger and more massive particles. We have recently suggested the use of ...
Peer reviewedJournal article
• PEPT: an invaluable tool for 3-D particle tracking and CFD simulation verification in hydrocyclone studies ﻿

(EDP Sciences, 2013)
Particle tracks in a hydrocyclone generated both experimentally by positron emission particle tracking (PEPT) and numerically with Eulerian-Lagranian CFD have been studied and compared. A hydrocyclone with a cylinder-on-cone ...
Journal article
• Performance Evaluation of a Small-Animal PET/CT System ﻿

(The University of Bergen, 2014-06-02)
This master project is the first vendor-independent performance evaluation of the new nanoScan PET/CT system at the University of Bergen. A comprehensive performance evaluation of a novel scanner is very important, ...
Master thesis
• Performance of the ATLAS muon trigger in pp collisions at $\sqrt{s}=$8 TeV ﻿

(Springer, 2015-03-13)
The performance of the ATLAS muon trigger system has been evaluated with proton--proton collision data collected in 2012 at the Large Hadron Collider at a centre-of-mass energy of 8 TeV. The performance was primarily ...
Journal article