Now showing items 25-44 of 592

• #### Calibration of the ALICE Photon Spectromter (PHOS) using the neutral pion to gamma gamma decay ﻿

(The University of Bergen, 2009-09-01)
The Large Hadron Collider (LHC) is under construction beneath the border between Switzerland and France. If it is successful, it will accelerate and collide protons at 7 T eV per proton in center of mass. Furthermore, it ...
Master thesis
• #### Catalysts for Enhanced CO2-CH4 Exchange in Natural Gas Hydrates. An experimental feasibility study of exchange enhancement by use of chemical additives ﻿

(The University of Bergen, 2013-06-01)
Gas hydrate is a solid state of gas and water at high pressure and low temperature conditions. Vast energy potential is associated with gas hydrates and extensive on-going research aims at addressing the technical viability ...
Master thesis
• #### Challenges related to storage and transfer of solar energy with a case study on long distance power transfer ﻿

(The University of Bergen, 2010-06-21)
The challenges that will be discussed in this thesis are two-fold; the problems related to trans- mission of power over long distances, and the need for energy storage, especially at night. Both of the issues are accentuated ...
Master thesis
• #### Characteristics of the flank magnetopause: Cluster observations ﻿

(WileyAmerican Geophysical Union, 2014-11)
The magnetopause is a current sheet forming the boundary between the geomagnetic field on one side and the shocked solar wind on the other side. This paper discusses properties of the low-latitude dawn and dusk flanks ...
Journal article
• #### Characterization of a neutral helium beam for helium microscopy ﻿

(The University of Bergen, 2015-06-29)
Neutral helium beam microscopy is a new development in scientific instrumentation where neutral helium atoms are utilized to image a sample. The main advantage of using neutral helium is the significantly smaller energy ...
Master thesis
• #### Characterization of Associating Polymer (AP) Solutions. Influences on flow behavior by the degree of hydrophobicity and salinity ﻿

(The University of Bergen, 2013-06-02)
The most applied polymer today for chemical improved oil recovery (IOR) processes, such as polymer flood and/or polymer well treatments, is the synthetic partially hydrolyzed polyacrylamide (HPAM) and its derivatives. ...
Master thesis

(The University of Bergen, 2013-09-11)
It is surprisingly problematic to to accurately measure light in the laboratory. Even more so when measuring in the field. There are lots of areas where measuring light spectrum and irradiance outside a laboratory is ...
Master thesis
• #### Characterization studies of a GEM detector prototype for the ALICE TPC upgrade for LHC Run 3 and beyond ﻿

(The University of Bergen, 2016-11-21)
The multiwire proportional chamber signal readout of the ALICE Time Projection Chamber (TPC) will be replaced by Gas Electron Multiplier (GEM) detectors to meet the new requirements due to higher collision rate and energies ...
Master thesis
• #### Charged Higgs boson searches and SemiConductor Tracker commissioning for the ATLAS experiment ﻿

(The University of Bergen, 2007-06-21)
The ATLAS (A Toroidal Lhc ApparatuS) experiment is one of four major experiments presently being installed at the upcoming Large Hadron Collider (LHC) at the European Centre for Nuclear Research (CERN) outside Geneva. In ...
Doctoral thesis
• #### Charged-Higgs production in the Two-Higgs-doublet model — the τ ν channel ﻿

(Springer, 2015-06-15)
We update the allowed parameter space of the CP-violating 2HDM with Type II Yukawa couplings, that survives the current experimental and theoretical constraints on the model. For a representative set of allowed parameter ...
Journal article
• #### Charged-particle multiplicities in $pp$ interactions at $\sqrt{s}$ = 900 GeV measured with the ATLAS detector at the LHC ﻿

(Elsevier, 2010-04)
The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy ...
Journal article
• #### Charged-particle multiplicity measurement in proton–proton collisions at √s = 0.9 and 2.36 TeV with ALICE at LHC ﻿

(Springer, 2010-07-12)
Charged-particle production was studied in proton–proton collisions collected at the LHC with the ALICE detector at centre-of-mass energies 0.9 TeV and 2.36 TeV in the pseudorapidity range |η|<1.4. In the central region ...
Peer reviewedJournal article
• #### Charged-particle multiplicity measurement in proton–proton collisions at √s = 7 TeV with ALICE at LHC ﻿

(Springer, 2010-08-03)
The pseudorapidity density and multiplicity distribution of charged particles produced in proton–proton collisions at the LHC, at a centre-of-mass energy Ös=7s=7 TeV, were measured in the central pseudorapidity region ...
Peer reviewedJournal article
• #### Chlorophyll a fluorescence lifetime reveals reversible UV-induced photosynthetic activity in the green algae Tetraselmis ﻿

(Springer, 2015)
The fluorescence lifetime is a very useful parameter for investigating biological materials on the molecular level as it is mostly independent of the fluorophore concentration. The green alga Tetraselmis blooms in summer, ...
Journal article
• #### Climatology of aerosol optical properties in Northern Norway and Svalbard ﻿

(European Geosciences Union, 2012-12-07)
We present comparisons between estimates of the aerosol optical thickness and the °Angstr¨om exponent in Northern Norway and Svalbard based on data from AERONET stations at Andenes (69 ◦N, 16 ◦E, 379 m altitude) and ...
Peer reviewedJournal article
• #### Cluster observations of a field aligned current at the dawn flank of a bursty bulk flow ﻿

(European Geosciences Union, 2007-06-29)
This article describes observations of a bursty bulk flow (BBF) in the outer central plasma sheet. The observations are made with the Cluster satellites, located approximately 19RE downtail, close to the midnight sector ...
Journal articlePeer reviewed
• #### CO2 Foam Stabilization with Nanoparticles and EOR in Fractured Carbonate Systems ﻿

(The University of Bergen, 2015-06-18)
This thesis is a part of an ongoing study of CO2 foam mobility control in the Reservoir Physics group at the Department of Physics and Technology (IFT) at the University of Bergen. The goal of this thesis was to evaluate ...
Master thesis
• #### CO2 Injection in Hydrate Bearing Sandstone with Excess Water ﻿

(The University of Bergen, 2013-05-31)
It has previously been shown that methane can be produced from gas hydrates by exposing it to carbon dioxide. Since CO2 is the preferred hydrate former below 10 °C it will spontaneously replace CH4 as the guest molecule ...
Master thesis
• #### CO2 injeksjon for økt oljeutvinning i kalk ﻿

(The University of Bergen, 2013-05-31)
Denne masteroppgaven studerer CO2 injeksjon for økt oljeutvinning i kalkstein, og hvordan parametere som sprekker, initielt vann og mobilitetskontroll påvirker oljeproduksjon. Det ble gjennomført 15 eksperimenter med ...
Master thesis
• #### CO2-injeksjon i Utsiraformasjonen - et studie av CO2/vann-kontakten og temperaturavhengige parametere ﻿

(The University of Bergen, 2012-06-01)
Since the start-up in 1996 over 15 Mt CO2 have been injected in to the geological formation Utsira at the commercial CO2 storage project Sleipner. The propagation of CO2 in the reservoir has been monitored by time-lapse ...
Master thesis