Now showing items 1366-1385 of 2128

    • Operation and performance of the ATLAS Tile Calorimeter in Run 1 

      Aaboud, Morad; Aad, Georges; Abbott, Brad; Abdallah, Jalal; Abdinov, Ovsat Bahram oglu; Abeloos, Baptiste; Abhayasinghe, Deshan Kavishka; Abidi, Syed Haider; AbouZeid, Hass; Abraham, Nadine L.; Buanes, Trygve; Eigen, Gerald; Fomin, Nikolai; Lipniacka, Anna; Martin dit Latour, Bertrand; Mæland, Steffen; Stugu, Bjarne; Yang, Zongchang; Zalieckas, Justas; Bugge, Magnar Kopangen; Cameron, David Gordon; Catmore, James Richard; Feigl, Simon; Franconi, Laura; Garonne, Vincent; Gramstad, Eirik; Hellesund, Simen; Morisbak, Vanja; Oppen, Henrik; Ould-Saada, Farid; Pedersen, Maiken; Read, Alexander Lincoln; Røhne, Ole Myren; Sandaker, Heidi; Serfon, Cédric; Stapnes, Steinar; Vadla, Knut Oddvar Høie; Abramowicz, Halina; Abreu, Henso; Abulaiti, Yiming; Acharya, Bobby S.; Adachi, Shunsuke; Adamczyk, Leszek; Adelman, Jareed; Adersberger, Michael; Adigüzel, Aytül; Adye, Tim; Affolder, Anthony Allen; Afik, Yoav; Agheorghiesei, Catalin; Zwalinski, L; ATLAS, Collaboration (Peer reviewed; Journal article, 2018-11-30)
      The Tile Calorimeter is the hadron calorimeter covering the central region of the ATLAS experiment at the Large Hadron Collider. Approximately 10,000 photomultipliers collect light from scintillating tiles acting as the ...
    • Optical emissions associated with narrow bipolar events from thunderstorm clouds penetrating into the stratosphere 

      Liu, Feifan; Lu, Gaopeng; Neubert, Torsten; Lei, Jiuhou; Chanrion, Olivier; Østgaard, Nikolai; Li, Dongshuai; Luque, Alejandro; Gordillo-Vázquez, Francisco J.; Reglero, Victor; Lyu, Weitao; Zhu, Baoyou (Journal article; Peer reviewed, 2021)
      Narrow bipolar events (NBEs) are signatures in radio signals from thunderstorms observed by ground-based receivers. NBEs may occur at the onset of lightning, but the discharge process is not well understood. Here, we present ...
    • Optical Insight Into Riverine Influences on Dissolved and Particulate Organic Carbon in a Coastal Arctic Lagoon System 

      Catipovic, L.; Longnecker, K.; Okkonen, S.R.; Koestner, Daniel Warren; Laney, S.R. (Journal article; Peer reviewed, 2023)
      Arctic coastal margins receive organic material input from rivers, melted sea ice, and coastal erosion, phenomena that are all undergoing changes related to global climate. The optical properties of coastal Arctic waters ...
    • Optical spectroscopy for tissue diagnostics and treatment control 

      Yavari, Nazila (Doctoral thesis, 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 ...
    • Optical velocity meter based on Ramsey oscillations in a double-grating setup 

      Preclíková, Jana; Kozák, Martin; Fregenal, Daniel; Hansen, Jan Petter (Peer reviewed; Journal article, 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 ...
    • Optimisation of large-radius jet reconstruction for the ATLAS detector in 13 TeV proton–proton collisions 

      Aad, Georges; Abbott, Brad; Abbott, Dale C.; Abed Abud, Adam; Abeling, Kira; Abhayasinghe, Deshan Kavishka; Abidi, Syed Haider; AbouZeid, Ossama Sherif Alexander; Abraham, Nadine L.; Abramowicz, Halina; Bjørke, Kristian; Bugge, Magnar Kopangen; Cameron, David Gordon; Catmore, James Richard; Garonne, Vincent; Gramstad, Eirik; Heggelund, Andreas; Hellesund, Simen; Håland, Even Simonsen; Morisbak, Vanja; Oppen, Henrik; Ould-Saada, Farid; Pedersen, Maiken; Read, Alexander Lincoln; Rye, Eli Bæverfjord; Røhne, Ole Myren; Sandaker, Heidi; Vadla, Knut Oddvar Høie; Buanes, Trygve; Djuvsland, Julia Isabell; Eigen, Gerald; Fomin, Nikolai; Latour, Bertrand Pascal Christian; Lee, Graham Richard; Lipniacka, Anna; Stugu, Bjarne Sandvik; Træet, Are Sivertsen; Abreu, Henso; Abulaiti, Yiming; Acharya, Bobby S.; Achkar, Baida; Adam, Lennart; Adam-Bourdarios, Claire; Adamczyk, Leszek; Adamek, Lukas; Adelman, Jareed; Adigüzel, Aytül; Adorni, Sofia; Adye, Tim; Affolder, Anthony Allen; ATLAS, Collaboration (Journal article; Peer reviewed, 2021)
      Jet substructure has provided new opportunities for searches and measurements at the LHC, and has seen continuous development since the optimization of the large-radius jet definition used by ATLAS was performed during Run ...
    • Optimization of proton therapy plans with respect to biological and physical dose distributions 

      Henjum, Helge (Master thesis, 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 differ ...
    • Optimization, evaluation and application of EEP measurements in the presence of contaminating protons 

      Haderlein, Astrid (Master thesis, 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 ...
    • Optimized mesoscale growth of microalgae: A modelling approach 

      Haddal, Nicolai Skailand (Master thesis, 2017-11-20)
      Photosynthesis is a process that uses water, carbon dioxide and light to create sugar and oxygen. Sugar and oxygen is then used by the cell for maintenance and growth purposes through cellular respiration. We would then ...
    • Optimizing hydroxyl airglow retrievals from long-slit astronomical spectroscopic observations 

      Franzen, Christoph; Hibbins, Robert; Espy, Patrick Joseph; Djupvik, Anlaug Amanda (Peer reviewed; Journal article, 2017-08-25)
      Astronomical spectroscopic observations from ground-based telescopes contain background emission lines from the terrestrial atmosphere's airglow. In the near infrared, this background is composed mainly of emission from ...
    • Optisk goniometer for optimalisering av retningsbestemt solenergi 

      Frette, Kristian (Master thesis, 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, ...
    • An organ deformation model using Bayesian inference to combine population and patient-specific data 

      Rørtveit, Øyvind Lunde; Hysing, Liv Bolstad; Stordal, Andreas Størksen; Pilskog, Sara Margareta Cecilia (Journal article; Peer reviewed, 2023)
      Objective. Organ deformation models have the potential to improve delivery and reduce toxicity of radiotherapy, but existing data-driven motion models are based on either patient-specific or population data. We propose to ...
    • The Organ Sparing Potential of Different Biological Optimization Strategies in Proton Therapy 

      Henjum, Helge; Dahle, Tordis Johnsen; Fjæra, Lars Fredrik; Rørvik, Eivind; Pilskog, Sara Margareta Cecilia; Stokkevåg, Camilla H.; Mairani, Andrea; Ytre-Hauge, Kristian Smeland (Journal article; Peer reviewed, 2021)
      Purpose: Variable relative biological effectiveness (RBE) models allow for differences in linear energy transfer (LET), physical dose, and tissue type to be accounted for when quantifying and optimizing the biological ...
    • Origin and development of the Godbert-Greenwald furnace for measuring minimum ignition temperatures of dust clouds 

      Eckhoff, Rolf Kristian (Journal article; Peer reviewed, 2019)
      Hot surfaces that can ignite explosible dust clouds can occur in various process situations in industry, e.g. inside furnaces, burners and dryers of various kinds. Hot surfaces can also be generated accidentally e.g. by ...
    • Outlook of solar energy in Europe based on economic growth characteristics 

      Madsen, Dorte Nørgaard; Hansen, Jan Petter (Peer reviewed; Journal article, 2019)
      Solar power production in Europe has raised from about 130 MW to 110 GW of installed capacity (corresponding to 90 GWh to 120 TWh in annual electricity generation) during the present century. Together with wind power, it ...
    • Overview of solar wind - magnetosphere - ionosphere - atmosphere coupling and the generation of magnetospheric currents 

      Milan, Stephen Eric; Clausen, Lasse Boy Novock; Coxon, John Charles; Carter, Jenny A.; Walach, Maria Theresia; Laundal, Karl Magnus; Østgaard, Nikolai; Tenfjord, Paul Arne Riksheim; Reistad, Jone Peter; Snekvik, Kristian; Korth, Haje; Anderson, Brian J. (Peer reviewed; Journal article, 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) ...
    • Overview of the Rocket Experiment for NeutralUpwelling Sounding Rocket 2 (RENU2) 

      Lessard, Marc R.; Fritz, Bruce; Sadler, Brent; Cohen, Ian J.; Kenward, David; Godbole, Niharika; Clemmons, James H.; Hecht, James H.; Lynch, Kristina A.; Harrington, Meghan; Roberts, Thomas M.; Hysell, David; Crowley, Geoff; Sigernes, Fred; Syrjäsuo, Mikko; Ellingsen, Pål Gunnar; Partamies, Noora; Moen, Jøran Idar; Clausen, Lasse Boy Novock; Oksavik, Kjellmar; Yeoman, Timothy (Journal article; Peer reviewed, 2020)
      The Rocket Experiment for Neutral Upwelling 2 (RENU2) rocket was launched on 13 December 2015 at 07:34 UT. The payload transited the cusp region during a neutral upwelling event, supported by a comprehensive set of onboard ...
    • Parameter Scans and Machine Learning for beyond Standard Model Physics 

      Strümke, Inga (Doctoral thesis, 2019-05-02)
      This thesis focuses on different beyond Standard Model theories, and the use of statistical methods to investigate them. Supersymmetry is considered in different contexts. First, the supersymmetry breaking scheme of gaugino ...
    • Particle Energization in Space Plasmas: Towards a Multi-Point, Multi-Scale Plasma Observatory 

      Retinò, Alessandro; Khotyaintsev, Y; Le Contel, O; Marcucci, Maria Federica; Plaschke, Ferdinand; Vaivads, Andris; Angelopoulos, Vassilis; Blasi, Pasquale; Burch, Jim; De Keyser, Johan; Dunlop, Malcolm; Dai, Lei; Eastwood, Jonathan; Fu, Huishan; Håland, Stein Egil; Hoshino, Masahiro; Johlander, Andreas; Kepko, Larry; Kucharek, Harald; Lapenta, Gianni; Lavraud, Benoit; Malandraki, Olga; Matthaeus, William; McWilliams, Kathryn; Petrukovich, Anatoli; Pinçon, Jean-Louis; Saito, Yoshifumi; Sorriso-Valvo, Luca; Vainio, Rami; Wimmer-Schweingruber, Robert (Journal article; Peer reviewed, 2021)
      This White Paper outlines the importance of addressing the fundamental science theme “How are charged particles energized in space plasmas” through a future ESA mission. The White Paper presents five compelling science ...
    • Particle identification in ALICE: a Bayesian approach 

      Adam, Jaroslav; Adamová, Dagmar; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Ahmad, Shafiq F.; Ahn, Sang Un; Aiola, Salvatore; Alme, Johan; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Altinpinar, Sedat; Djuvsland, Øystein; Haaland, Øystein Senneset; Lønne, Per-Ivar; Nystrand, Joakim; Rehman, Attiq ur; Røhrich, Dieter; Tambave, Ganesh Jagannath; Ullaland, Kjetil; Velure, Arild; Wagner, Boris; Zhang, Hui; Zhou, Zhuo; Zhu, Hongsheng; Arsene, Ionut Christian; Bätzing, Paul Christoph; Dordic, Olja; Lindal, Svein; Mahmood, Sohail Musa; Milosevic, Jovan; Qvigstad, Henrik; Richter, Matthias; Røed, Ketil; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Zhao, Chengxin; Langøy, Rune; Lien, Jørgen André; Akindinov, Alexander; Alam, Sk Noor; De Albuquerque, Danilo Silva; Aleksandrov, Dimitry; Alessandro, Bruno; Alexandre, Didier; Alfaro Molina, José Rubén; ALICE, Collaboration (Peer reviewed; Journal article, 2016-05-25)
      We present a Bayesian approach to particle identification (PID) within the ALICE experiment. The aim is to more effectively combine the particle identification capabilities of its various detectors. After a brief explanation ...