Blar i Department of Physics and Technology på tittel
Viser treff 1945-1964 av 2132
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Study of meso-scale reversed flow events in the polar ionosphere by SuperDARN radars
(Master thesis, 2017-06-29)In this study we have investigated Reversed Flow Events (RFEs) in the northern hemisphere polar cap. A RFE is an ∼50-250 km wide flow channel that opposes the large scale background flow. A total of 57 new RFEs were ... -
A study of selected problems related to accidental process fires
(Doctoral thesis, 2011-04-15)An experimental full scale characterization of a turbulent propane jet flame has been made in terms of temperatures and radiation. Sonic propane gas releases were achieved at steady pressure and near steady flow. Commercial ... -
A study of temperature profiles in ceiling jets under horizontal unconfined ceilings with the CFD tools FLACS and FDS
(Master thesis, 2017-06-22)The key to controlling accidental fires, is early detection by the correct placement of devices such as smoke detectors and sprinkler systems. Smoke is accompanied by a temperature rise, brought about by the ceiling jet ... -
A study of the b-quark fragmentation function with the DELPHI detector at LEP I and an averaged distribution obtained at the Z Pole
(Peer reviewed; Journal article, 2011-02-23)The nature of b-quark jet hadronisation has been investigated using data taken at the Z peak by the DELPHI detector at LEP. Two complementarymethods are used to reconstruct the energy of weakly decaying b-hadrons, Eweak B ... -
A study of the Coriolis flowmeter as a reference instrument in multiphase flow
(Master thesis, 2015-09-11)The objective of this thesis was to investigate how a two-liquid mixture, and injected gas, affects the measurements of a Coriolis flowmeter. Furthermore it was of interest to investigate whether entrained gas could be ... -
Study of the dependence of direct soft photon production on the jet characteristics in hadronic Z0 decays
(Peer reviewed; Journal article, 2010-06-09)An analysis of the direct soft photon production rate as a function of the parent jet characteristics is presented, based on hadronic events collected by the DELPHI experiment at LEP1. The dependences of the photon rates ... -
Study of the flow in a hydrocyclone using positron emission particle tracking and computational fluid dynamics simulation
(Doctoral thesis, 2016-06-22)This thesis presents my work of studying the flow in a hydrocyclone using positron emission particle tracking (PEPT) and computational fluid dynamics (CFD) simulation. Hydrocyclone separators are a type of cyclone separators ... -
Study of the hard double-parton scattering contribution to inclusive four-lepton production in pp collisions at √s=8 TeV with the ATLAS detector
(Peer reviewed; Journal article, 2019-03-10)The inclusive production of four isolated charged leptons in pp collisions is analysed for the presence of hard double-parton scattering, using 20.2 fb−1 of data recorded in the ATLAS detector at the LHC at centre-of-mass ... -
Study of the process e+e- →π+π-π0 using initial state radiation with BABAR
(Journal article; Peer reviewed, 2021)The process e+e−→π+π−π0γ is studied at a center-of-mass energy near the Υ(4S) resonance using a data sample of 469 fb−1 collected with the BABAR detector at the PEP-II collider. We have performed a precise measurement of ... -
Study of the rare decays of B_s^0 and B^0 mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector
(Peer reviewed; Journal article, 2019-04-15)A study of the decays B 0s → μ+μ− and B0 → μ+μ− has been performed using 26.3 fb−1 of 13 TeV LHC proton-proton collision data collected with the ATLAS detector in 2015 and 2016. Since the detector resolution in μ+μ− invariant ... -
Study of the reactions e + e − → 2ðπ + π − Þπ0π0π0 and 2ðπ + π − Þπ0π0η at center-of-mass energies from threshold to 4.5 GeV using initial-state radiation
(Journal article; Peer reviewed, 2021)We study the processes e+e−→2(π+π−)π0π0π0γ and 2(π+π−)π0π0ηγ in which an energetic photon is radiated from the initial state. The data were collected with the BABAR detector at SLAC. About 14 000 and 4700 events, respectively, ... -
Study of the reactions e + e − → π + π − π0π0π0π0 and π + π − π0π0π0η at center-of-mass energies from threshold to 4.5 GeV using initial-state radiation
(Journal article; Peer reviewed, 2021)We study the processes e+e−→π+π−π0π0π0π0γ and π+π−π0π0π0ηγ in which an energetic photon is radiated from the initial state. The data were collected with the BABAR detector at the SLAC National Accelerator Laboratory. About ... -
Study of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHC
(Peer reviewed; Journal article, 2019-10-10)This work presents new constraints on the existence and the binding energy of a possible Λ–Λ bound state, the H-dibaryon, derived from Λ–Λ femtoscopic measurements by the ALICE collaboration. The results are obtained from ... -
A study of transfer rates of phenols from caustic to crude oil
(Peer reviewed; Journal article, 2019-04)Phenol and phenolic compounds are a common problem in various industries, due to their ability to dissolve in aqueous solutions, such as caustic. Caustic is used in several industrial operations for pH adjustments and for ... -
Study of very forward energy and its correlation with particle production at midrapidity in pp and p-Pb collisions at the LHC
(Journal article; Peer reviewed, 2022)The energy deposited at very forward rapidities (very forward energy) is a powerful tool for characterising proton fragmentation in pp and p-Pb collisions. The correlation of very forward energy with particle production ... -
A study of Λ and ¯Λ polarization splitting by meson field in PICR hydrodynamic model
(Journal article; Peer reviewed, 2021)With the PICR hydrodynamic model, we study the polarization splitting between Λ and Λ¯ at RHIC BES energy range, based on the meson field mechanism. Our results fit to the experimental data fairly well. Besides, two ... -
Study on viability of Gain Stabilization of SiPMs and determination of b-quark fragmentation fraction ratio f_c/f_u in pp collisions at √s = 13 TeV with the ATLAS detector
(Master thesis, 2017-09-05)Gain Stabilization of SiPMs through the usage of an external board to regulate bias voltage based on temperature yields a variation in gain of less than 0.5 % using a system of four SiPMs with temperature readout in close ... -
Sub-resolution contrast in neutral helium microscopy through facet scattering for quantitative imaging of nanoscale topographies on macroscopic surfaces
(Journal article; Peer reviewed, 2023)Nanoscale thin film coatings and surface treatments are ubiquitous across industry, science, and engineering; imbuing specific functional or mechanical properties (such as corrosion resistance, lubricity, catalytic activity ... -
Substantial Sparing of Organs at Risk with Modern Proton Therapy in Lung Cancer, but Altered Breathing Patterns Can Jeopardize Target Coverage
(Journal article; Peer reviewed, 2022-03-08)Enhancing treatment of locally advanced non-small cell lung cancer (LA-NSCLC) by using pencil beam scanning proton therapy (PBS-PT) is attractive, but little knowledge exists on the effects of uncertainties occurring between ... -
Substorm Current Wedge: Energy Conversion and Current Diversion
(Journal article; Peer reviewed, 2020)Using a magnetohydrodynamic simulation of magnetotail reconnection, flow bursts, and dipolarization, we further investigate the current diversion and energy flow and conversion associated with the substorm current wedge ...