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| 9. |
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2021 : La odisea del 23-F
- 2021
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Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
- Este volumen es una reflexión sobre cómo el 23-F, un evento fundamental en la historia española contemporánea y en la Transición, ha ido transformándose en su narrativa, y cómo dicho cambio se ha gestado en la producción cultural y artística a lo largo de cuatro décadas.Dividido en ocho capítulos, se analizan novelas, películas, series de televisión, documentales, obras de teatro e instalaciones escultóricas bajo la perspectiva de qué obras reaccionan y cuáles accionan, entendiendo como obras reactivas aquellas que continúan con el statu quo sin generar perspectivas distintas, frente a las obras activas que posibilitan nuevos enfoques y aproximaciones alternativas con el paso del tiempo.En definitiva, esta edición es una invitación a que el/la lector/a revisite las narrativas establecidas sobre el 23-F y asimismo se acerque a otros modos de (re)presentarlo, para tener una experiencia más completa del acontecimiento y sus implicaciones.
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30th European Conference on Information Systems - New Horizons in Digitally United Societies, ECIS 2022, Timisoara, Romania, June 18-24, 2022
- 2022
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Proceedings (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
- Digitization is already changing Europe and the whole world. Whether or not we can leverage its opportunities to foster prosperity, human well-being, and sustainability depends on the strategic decisions taken today. Will the countries work together to embrace these opportunities, or will they let this chance pass? Overcoming historical divides and acting solidarity united in a prosperous Europe is the only way. As digital frontrunners, the IS researchers have a key role to play and the responsibility to act as an engine to make the digital transition happen at a sufficiently fast pace for Europe to remain competitive in a rapidly digitizing world. Digitization in united societies is about bringing people together, having a better life and a bright future. Together we can build societies collectively inclusive, innovative, and able to adapt to the massive societal challenges of the 21st century. ECIS 2022 will bring together information systems (IS) researchers in East and West, being only the second time in Eastern Europe after Gdańsk, Poland, in 2002. ECIS in Timișoara will provide a unique opportunity to unite IS researchers in Europe, making it an inclusive conference that allows all academics from AIS Region 2 to participate. We believe that the participants will find the conference fee really likeable and we promise to deliver good value for the money. Timișoara’s aim is to connect and ultimately digitally unite academics and societies.
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50 Years of Law and IT : The Swedish Law and Informatics Research Institute 1968-2018
- 2018
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Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
- In 1968, the first seminar on Electronic Data Processing and Law was held at Stockholm University. Later that year The Working Party for EDP and Law was established. The topic soon became part of the legal curricula and a meeting point for scholars and professionals with background in information science and law.
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A Beginner's Guide to Swedish Academia
- 2022
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Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
- As new to the Swedish research system, one is faced with a series of questions, about what applies to qualifications, what the networks look like, but also practical issues. To make things easier, YAS has developed a guide for international researchers, to help navigate Swedish academia and remove time-consuming obstacles.
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| 19. |
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| 20. |
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A Companion to Birgitta of Sweden and Her Legacy in the Later Middle Ages
- 2019
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Samlingsverk (redaktörskap) (refereegranskat)abstract
- St Birgitta of Sweden (d. 1373) is one of the most celebrated female visionaries and authors of the Middle Ages and a central figure in the history of late-medieval religion. An aristocratic widow, Birgitta left her native country in 1349 and settled in Rome, where she established herself as an outspoken critic of the Avignon Papacy and an advocate of spiritual and ecclesiastical reform. Birgitta founded a new monastic order, and her major work, The Heavenly Book of Revelations, circulated widely in a variety of monastic, reformist, and intellectual milieus following her death. This volume offers an introduction to the saint and the reception of her work written by experts from various disciplines. In addition to acquainting the reader with the state of the scholarship, the study also presents fresh interpretations and new perspectives on Birgitta and the sources for her life and writings.
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A Cultural History of the Avant-Gardes in the Nordic Countries 1925-50
- 2019
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Samlingsverk (redaktörskap) (refereegranskat)abstract
- A Cultural History of the Avant-Garde in the Nordic Countries 1925-1950 is the first publication to deal with the avant-garde in the Nordic countries in this period. The essays cover a wide range of avant-garde manifestations: literature, visual arts, theatre, architecture and design, film, radio, body culture and magazines. It is the first major historical work to consider the Nordic avant-garde in a transnational perspective that includes all the arts and to discuss the role of the avant-garde not only within the aesthetic field but in a broader cultural and political context: the pre-war and wartime responses to international developments, the new cultural institutions, sexual politics, the impact of refugees and the new start after the war.
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| 24. |
- A. da Cruz, Marcia Gabriely, et al.
(författare)
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Biocoatings and additives as promising candidates for ultralow friction systems
- 2021
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Ingår i: Green Chemistry Letters and Reviews. - : Informa UK Limited. - 1751-8253 .- 1751-7192. ; 14:2, s. 356-379
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Forskningsöversikt (refereegranskat)abstract
- The achievement of frictionless systems, known as superlubricity, has become of great importance concerning energy saving and emission reduction. In parallel, the drive toward sustainability and environmental aspects has led to intense advances in the research and development of biobased materials. From the standpoint of Green Chemistry principles, this review presents a critical overview of the latest findings and future perspectives on the application of biobased materials aiming at superlubricant pursuits. The progress in the use of biomacromolecules, such as chitosan, cellulose, and lignin, as additives to lubricants or coating materials, are addressed, as well as the advances on sustainable coatings based on diamond-like carbon (DLC). Deeper investigations on the development of non-hazardous processes dedicated to the tribological properties of DLC, such as electrochemical synthesis using environment-friendly solvents to generate molecular precursors, widen the perspectives to achieve sustainable materials. Besides, the exploration of the tribochemical interactions between the DLC surface and lubricants containing biobased materials arises as a promising strategy to achieve green superlubricity as a viable and scalable process, through different pathways: by hydrogen bonds between lubricant and additives, via surface passivation of the functional groups present in these biomacromolecules or by biomimicking natural joints.
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| 25. |
- A. da Cruz, Márcia G., et al.
(författare)
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Electrochemical Depolymerization of Lignin in a Biomass-based Solvent
- 2022
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Ingår i: ChemSusChem. - : Wiley. - 1864-5631 .- 1864-564X. ; 15:15
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Tidskriftsartikel (refereegranskat)abstract
- Breaking down lignin into smaller units is the key to generate high value-added products. Nevertheless, dissolving this complex plant polyphenol in an environment-friendly way is often a challenge. Levulinic acid, which is formed during the hydrothermal processing of lignocellulosic biomass, has been shown to efficiently dissolve lignin. Herein, levulinic acid was evaluated as a medium for the reductive electrochemical depolymerization of the lignin macromolecule. Copper was chosen as the electrocatalyst due to the economic feasibility and low activity towards the hydrogen evolution reaction. After depolymerization, high-resolution mass spectrometry and nuclear magnetic resonance spectroscopy revealed lignin-derived monomers and dimers. A predominance of aryl ether and phenolic groups was observed. Depolymerized lignin was further evaluated as an anti-corrosion coating, revealing enhancements on the electrochemical stability of the metal. Via a simple depolymerization process of biomass waste in a biomass-based solvent, a straightforward approach to produce high value-added compounds or tailored biobased materials was demonstrated.
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| 26. |
- A. da Cruz, Marcia Gabriely, et al.
(författare)
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On the product selectivity in the electrochemical reductive cleavage of 2-phenoxyacetophenone, a lignin model compound
- 2022
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Ingår i: Green Chemistry Letters and Reviews. - : Informa UK Limited. - 1751-8253 .- 1751-7192. ; 15:1, s. 151-159
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Tidskriftsartikel (refereegranskat)abstract
- Research towards the production of renewable chemicals for fuel and energy industries has found lignin valorization as key. With a high carbon content and aromaticity, a fine-tuning of the depolymerization process is required to convert lignin into valuable chemicals. In context, model compounds have been used to understand the electrocatalyzed depolymerization for mimicking the typical linkages of lignin. In this investigation, 2-phenoxyacetophenone, a model compound for lignin beta-O-4 linkage, was electro-catalytically hydrogenated (ECH) in distinct three-electrode setups: an open and a membrane cell. A deep eutectic solvent based on ethylene-glycol and choline chloride was used to pursue sustainable routes to dissolve lignin. Copper was used as electrocatalyst due to the economic feasibility and low activity towards hydrogen evolution reaction (HER), a side reaction of ECH. By varying the cell type, we demonstrate a simple ECH route for the generation of different monomers and oligomers from lignin. Gas chromatography of the products revealed a higher content of carbonyl groups in those using the membrane cell, whereas the open cell produced mostly hydroxyl-end chemicals. Aiming at high value-added products, our results disclose the cell type influence on electrochemical reductive depolymerization of lignin. This approach encompasses cheap transition metal electrodes and sustainable solvents.
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| 27. |
- A. da Cruz, Márcia G., et al.
(författare)
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Solvent-free synthesis of photoluminescent carbon nanoparticles from lignin-derived monomers as feedstock
- 2023
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Ingår i: Green Chemistry Letters and Reviews. - 1751-8253 .- 1751-7192. ; 16:1
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Tidskriftsartikel (refereegranskat)abstract
- Photoluminescent carbon nanoparticles (CNPs), such as carbon dots (CDs), have attracted much attention owing to a unique set of properties, like high and tunable fluorescence. In this way, the use of carbon-rich lignin has been demonstrated to be a sustainable approach to producing a broad range of photoluminescent CNPs. However, the valorization of this complex polyphenol is limited when it comes to green and efficient ways of conversion. In addition, the existing solvothermal approaches using lignin often result in CDs with low photoluminescence, while flammable and/or toxic solvents are employed. Here, we depolymerized technical lignins, i.e. kraft and soda, through electroreductive cleavage in two different sustainable media: deep eutectic solvent and levulinic acid. After depolymerization, lignin-derived monomers were generated, with a predominance of aryl ether and phenolic groups, which were further combined with 1,2-Phenylenediamine to produce N-doped CNPs in a solvent-free approach. Photoluminescent CNPs with varied sizes were generated (5–50 nm), which presented a wide photoluminescence emission, from blue to red, depending on solvent polarity. These results demonstrate a feasible and sustainable route for the solvent-free synthesis of photoluminescent CNPs using lignin-derived monomers as carbon source, which may find applications in a wide range of fields.
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| 28. |
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| 29. |
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A Lexicon of Medieval Nordic Law
- 2019
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Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
- A Lexicon of Medieval Nordic Law (LMNL) is a multilingual reference work designed to make terminology from several medieval legal texts more accessible to English-speaking audiences. It contains over 6000 Nordic headwords, more than 9000 English equivalents and approximately 13,200 cross-references. It is intended to function as a general lexicon of medieval Nordic legal terminology in use before the national laws. Where possible the editors have combined related terms in multiple languages under the same headword in order to highlight similarities throughout the Nordic region during the Middle Ages. The LMNL differs from other reference works, and in particular other lexica, by its presentation of related terms from multiple languages within a single entry in a manner similar to the Kulturhistoriskt lexikon för nordisk medeltid (KLNM). Around a quarter of the entries feature a brief text articulating how the term fits into the legal landscape. Creation of the LMNL has been made possible in large part due to a generous project grant from the Swedish Research Council (2014-2017) and the gracious cooperation of members of the ongoing Medieval Nordic Laws (MNL) project begun at the University of Aberdeen in 2009. Draft English translations supplied by them, along with a small number of published translations (see table below), form the basis of this lexicon. Additional support was provided by the Royal Swedish Academy of Letters, which supplied funding for translations and revisions of some MNL laws and for the LMNL colloquium held in Stockholm in November 2015.
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| 30. |
- A. Madsen, Kevin, et al.
(författare)
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Josephson effect in a Weyl SNS junction
- 2017
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Ingår i: Physical Review B. - 2469-9950 .- 2469-9969. ; 95:6
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Tidskriftsartikel (refereegranskat)abstract
- We calculate the Josephson current density j (phi) for a Weyl superconductor-normal-metal-superconductor junction for which the outer terminals are superconducting Weylmetals and the normal layer is a Weyl (semi) metal. We describe the Weyl (semi) metal using a simple model with two Weyl points. The model has broken time-reversal symmetry, but inversion symmetry is present. We calculate the Josephson current for both zero and finite temperature for the two pairing mechanisms inside the superconductors that have been proposed in the literature, zero-momentum BCS-like pairing and finite-momentum FFLO-like pairing, and assuming the short-junction limit. For both pairing types we find that the current is proportional to the normal-state junction conductivity, with a proportionality coefficient that shows quantitative differences between the two pairing mechanisms. The current for the BCS-like pairing is found to be independent of the chemical potential, whereas the current for the FFLO-like pairing is not.
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| 31. |
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| 32. |
- A. Manneh, Ilana, et al.
(författare)
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Progression in action for developing chemical knowledge
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- In this paper, we discuss the well-known teaching challenge of how to provide undergraduate students with basic chemistry knowledge without making them experience these basics as meaningless and unintelligible. First, we situate the challenge in a classic dilemma: should we teach the necessary basic facts before the chemical explanations or should the explanations be taught before or in parallel to these facts? Here we draw on examples from interviews with graduate students reflecting on their experiences regarding their studies at the undergraduate level. Second, we suggest a way out of the dilemma, through a shift in perspective from the typical progression of facts and explanations towards a purpose and activity-based progression. We conclude with a discussion of implications of such a shift for university chemistry education together with suggestions for future research.
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| 33. |
- A. Manneh, Ilana, 1970-
(författare)
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Supporting Learning and Teaching of Chemistry in the Undergraduate Classroom
- 2019
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- There is agreement in research about the need to find better ways of teaching chemistry to enhance students’ understanding. This thesis aims to contribute to the understanding of how we better support teaching and learning of undergraduate chemistry to make it meaningful and intelligible for students from the outset. The thesis is concerned with examining the interactions between student, specific content and teacher in the undergraduate chemistry classroom; that is, the processes making up the three relations of the didactic triangle. The data consists of observations of students and tutors during problem-solving activities in an introductory chemistry course and interviews with graduate students.Systematic analyses of the different interactions between the student, the chemistry content, and the tutor are made using the analytical tool of practical epistemology analysis. The main findings of the thesis include detailed insights into how undergraduate chemistry students deal with newly encountered content together with didactic models and concrete suggestions for improved teaching and for supporting continuity and progression in the undergraduate chemistry classroom. Specifically, I show how students deal with the chemistry content through a complex interaction of knowledge, experiences, and purposes on different levels invoked by both students and tutors as they interact with each other. Whether these interactions have a positive or negative effect on students’ learning depends on the nature of knowledge, experiences and purposes that were invoked. Moreover, the tutor sometimes invoked other purposes than the ones related to the task at hand for connecting the activity to the subject matter in general. These purposes were not always made continuous with the activity which resulting in confusion among students. The results from these analyses were used for producing hypotheses and models that could support continuity and progression during the activity. The suggested models aim to make the content more manageable and meaningful to students, enabling connections to other experiences and purposes, and helping teachers and tutors to analyze and reflect on their teaching. Moreover, a purpose- and activity-based progression is suggested that gives attention to purposes in chemistry education other than providing explanations of chemical phenomena. The aim of this ‘progression in action’ is to engage students in activities were they can see the meaning of chemical concepts and ideas through their use to accomplish different chemical tasks. A general conclusion is that detailed knowledge about the processes of teaching and learning is important for providing adequate support to both undergraduate students and university teachers in the chemistry classroom.
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| 34. |
- A. Manneh, Ilana, et al.
(författare)
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The role of anthropomorphisms in students’ reasoning about chemical structure and bonding
- 2018
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Ingår i: Asia-Pacific Forum on Science Learning and Teaching. - 1609-4913. ; 19:2
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Tidskriftsartikel (refereegranskat)abstract
- Anthropomorphisms are widespread at all levels of the educational system even among science experts. This has led to a shift in how anthropomorphisms are viewed in science education, from a discussion of whether they should be allowed or avoided towards an interest in their role in supporting students’ understanding of science. In this study we examine the role of anthropomorphisms in supporting students’ understanding of chemistry. We analyze examples from undergraduate students’ discussions during problem-solving classes through the use of practical epistemology analysis (PEA). Findings suggest that students invoked anthropomorphisms alongside technical relations which together produced more or less chemically appropriate explanations. Also, anthropomorphisms constitute potentially productive points of departure for rendering students’ explanations more chemically appropriate. The implications of this study refer to the need to deal with anthropomorphisms explicitly and repeatedly as well as to encourage explicit connections between different parts of the explanation - teleological as well as causal.
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| 35. |
- A. Manneh, Ilana, 1970-, et al.
(författare)
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Tutor-student interaction in undergraduate chemistry : a case of learning to make relevant distinctions of molecular structures for determining oxidation states of atoms
- 2018
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Ingår i: International Journal of Science Education. - : Informa UK Limited. - 0950-0693 .- 1464-5289. ; 40:16, s. 2023-2043
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Tidskriftsartikel (refereegranskat)abstract
- In this study, we explore the issues and challenges involved in supporting students’ learning to discern relevant and critical aspects of determining oxidation states of atoms in complex molecules. We present a detailed case of an interaction between three students and a tutor during a problem-solving class, using the analytical tool of practical epistemology analysis (PEA). The results show that the ability to make relevant distinctions between the different parts of a molecule for solving the problem, even with the guidance of the tutor, seemed to be challenging for students. These shifts were connected to both purposes that were specific for solving the problem at hand, and additional purposes for general learning of the subject matter, in this case how to assign oxidation states in molecules. The students sometimes could not follow the additional purposes introduced by the tutor, which made the related distinctions more confusing. Our results indicate that in order to provide adequate support and guidance for students the tutor needs to consider how to sequence, move between, and productively connect the different purposes introduced in a tutor-student interaction. One way of doing that is by first pursuing the purposes for solving the problem and then successively introduce additional, more general purposes for developing students’ learning of the subject matter studied. Further recommendations drawn from this study are discussed as well.
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| 36. |
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A Proactive Approach : Law Libraries
- 2006
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Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
- Reliance on routines to avoid mistakes is a self-evident feature of many fields of human activity. The commercial pilot preparing for take-off, the engineer designing a bridge and the insurance company introducing a new product all depend on proven methods to ensure that nothing important is forgotten and to assess the consequences of planned measures. Legal work is somewhat atypical in the foregoing respect. Compared with many other activities, there are few descriptions of how the various segments of a legal task are to be devised in order to achieve the greatest possible certainty of result. Lawyers tend to work reactively, i.e., the focus is on solving problems that have already arisen. Efforts aimed at avoiding problems before they begin to brew - i.e., proactively - are less common. The proactive approach is not unknown in the legal sphere but as compared to many other fields of the law the perspective is not very well elaborated. Against this background this volume of Scandinavian Studies in Law presents 25 articles on various aspects of proactive approaches in law, the majority of them focusing on contracting issues. The collection is simultaneously a documentation of a conference on proactive law held in Stockholm 2005. In addition to the articles on proactive law this volume contains a presentation of major law libraries in the Scandinavian countries. Table of Contents: Barton, Thomas D., Thinking Preventively and Proactively, p. 71-92 Bing, Jon and Mahler, Tobias, Contractual Risk Management in an ICT Context - Searching for a Possible Interface between Legal Methods and Risk Analysis, p. 339-358 Cummins, Tim, Best Practices In Commercial Contracting, p. 131-148 Daicoff, Susan, The Comprehensive Law Movement: An Emerging Approach to Legal Problems, p. 109-128 Dauer, Eduard A., The Role of Culture in Legal Risk Management, p. 93-108 Haapio, Helena, Introduction to Proactive Law from a Business Lawyer's Point of View, p. 21-34 Haapio, Helena, Business Success and Problem Prevention through Proactive Contracting, p. 149-194 Haarala-Nystén, Soili, Contract Law and Everyday Contracting, p. 263-284 Haavisto, Vaula, Contracting in Networks, p. 237-254 Jakobsen Sandfeld, Søren, Entering New and Converging Media Markets: How to Take a Proactive Approach to Legal Issues in the Electronic Communications Sector, p. 393-406 Kavaleff, Anette, Successful Outsourcing through Proactive Contracting - Strategy, Risk Assessment and Implementation, p. 215-226 Lando, Henrik, Determinants of the Optimal Degree of Pro-activeness in Contracting, p. 255-262 Magnusson, Jarl S., Proactive Law - and the Importance of Data and Information Resources, p. 407-424 Magnusson Sjöberg, Cecilia, Presentation of the Nordic School of Proactive Law, p. 13-20 Paris, Carolyn E.C., Contract Management: Design Parameters and Challenges to Implementation, p. 195-214 Pohjonen, Soile, Proactive Law in Academia, p. 53-70 Sadighi Firozabadi, Babak and Sergot, Marek , The Role of Agreements in Virtual Organisations, p. 297-304 Schartum, Dag Wiese, Introduction to a Government-based Perspective on Proactive Law, p. 35-52 Seipel, Peter, Nordic School of Proactive Law Conference 2005: Closing Comments, p. 359-364 Syse, Aslak, Equality and Accessibility: A Proactive Approach to Strengthen the Legal Status and Protection Against Discrimination of Persons with Disabilities, p. 367-384 Taskinen, Tommi K.J., Some Thoughts on Proactive Counselling and Legal Mentality, p. 227-236 Trzaskowski, Jan, Legal Risk Management in a Global, Electronic Marketplace, p. 319-338 Weitzenböck, Emily M., Prevention is Better than Cure: Fostering the Growth of Dynamic Networked Organisations through the use of Proactive Legal Measures, p. 305-318 Vikström, Mats, The Impact of IT on the Foundation for Businesses Daily Operation, p. 285-296 Zimmer, Frederik, Tax Legislation between Politics and Legal (and Economic) Thinking, p. 385-392 Law Libraries in Denmark, p. 427-433 Law Libraries in Finland, p. 434-441 Norwegian Law Libraries, p. 442-447 Law Libraries in Sweden, p. 448-462
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| 37. |
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A school for all : Special issue
- 2020
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Samlingsverk (redaktörskap) (refereegranskat)abstract
- A special Issue of Nordic Journal of Studies on Education Policy, with contributions of among others, Mel Ainskow, Peder Haug, Michel Knigge, Lise Roll-Petersson, Kajsa Falkner, Christian Ydesen, Daniel Östlund, Thomas Barow.
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| 38. |
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| 39. |
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| 40. |
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| 41. |
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| 42. |
- Aaberge, Rolf, et al.
(författare)
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Tony Atkinson and his Legacy
- 2017
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Ingår i: The Review of Income and Wealth. - : Wiley. - 0034-6586 .- 1475-4991. ; 63:3, s. 411-444
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Tidskriftsartikel (refereegranskat)abstract
- Tony Atkinson is universally celebrated for his outstanding contributions to the measurement and analysis of inequality, but he never saw the study of inequality as a separate branch of economics. He was an economist in the classical sense, rejecting any sub-field labelling of his interests and expertise, and he made contributions right across economics. His death on 1 January 2017 deprived the world of both an intellectual giant and a deeply committed public servant in the broadest sense of the term. This collective tribute highlights the range, depth and importance of Tony's enormous legacy, the product of almost fifty years’ work.
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| 43. |
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| 44. |
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| 45. |
- Aad, G., et al.
(författare)
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A search for heavy Higgs bosons decaying into vector bosons in same-sign two-lepton final states in pp collisions at √s=13 TeV with the ATLAS detector
- 2023
-
Ingår i: Journal of High Energy Physics (JHEP). - : Springer Nature. - 1126-6708 .- 1029-8479. ; 2023:7
-
Tidskriftsartikel (refereegranskat)abstract
- A search for heavy Higgs bosons produced in association with a vector boson and decaying into a pair of vector bosons is performed in final states with two leptons (electrons or muons) of the same electric charge, missing transverse momentum and jets. A data sample of proton–proton collisions at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider between 2015 and 2018 is used. The data correspond to a total integrated luminosity of 139 fb−1. The observed data are in agreement with Standard Model background expectations. The results are interpreted using higher-dimensional operators in an effective field theory. Upper limits on the production cross-section are calculated at 95% confidence level as a function of the heavy Higgs boson’s mass and coupling strengths to vector bosons. Limits are set in the Higgs boson mass range from 300 to 1500 GeV, and depend on the assumed couplings. The highest excluded mass for a heavy Higgs boson with the coupling combinations explored is 900 GeV. Limits on coupling strengths are also provided.
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| 46. |
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| 47. |
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| 48. |
- Aad, G, et al.
(författare)
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Alignment of the ATLAS Inner Detector in Run 2
- 2020
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Ingår i: European Physical Journal C. - : Springer Science and Business Media LLC. - 1434-6044 .- 1434-6052. ; 80:12
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Tidskriftsartikel (refereegranskat)abstract
- The performance of the ATLAS Inner Detector alignment has been studied using pp collision data at s=13TeV collected by the ATLAS experiment during Run 2 (2015–2018) of the Large Hadron Collider (LHC). The goal of the detector alignment is to determine the detector geometry as accurately as possible and correct for time-dependent movements. The Inner Detector alignment is based on the minimization of track-hit residuals in a sequence of hierarchical levels, from global mechanical assembly structures to local sensors. Subsequent levels have increasing numbers of degrees of freedom; in total there are almost 750,000. The alignment determines detector geometry on both short and long timescales, where short timescales describe movements within an LHC fill. The performance and possible track parameter biases originating from systematic detector deformations are evaluated. Momentum biases are studied using resonances decaying to muons or to electrons. The residual sagitta bias and momentum scale bias after alignment are reduced to less than ∼0.1TeV-1 and 0.9 × 10 - 3, respectively. Impact parameter biases are also evaluated using tracks within jets. © 2020, The Author(s).
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| 49. |
- Aad, G., et al.
(författare)
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Anomaly detection search for new resonances decaying into a Higgs boson and a generic new particle X in hadronic final states using √s=13 TeV pp collisions with the ATLAS detector
- 2023
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Ingår i: Physical Review D. - : AMER PHYSICAL SOC. - 2470-0010 .- 2470-0029. ; 108:5
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Tidskriftsartikel (refereegranskat)abstract
- A search is presented for a heavy resonance Y decaying into a Standard Model Higgs boson H and a new particle X in a fully hadronic final state. The full Large Hadron Collider run 2 dataset of proton-proton collisions at √s=13 TeV collected by the ATLAS detector from 2015 to 2018 is used and corresponds to an integrated luminosity of 139 fb−1. The search targets the high Y-mass region, where the H and X have a significant Lorentz boost in the laboratory frame. A novel application of anomaly detection is used to define a general signal region, where events are selected solely because of their incompatibility with a learned background-only model. It is constructed using a jet-level tagger for signal-model-independent selection of the boosted X particle, representing the first application of fully unsupervised machine learning to an ATLAS analysis. Two additional signal regions are implemented to target a benchmark X decay into two quarks, covering topologies where the X is reconstructed as either a single large-radius jet or two small-radius jets. The analysis selects Higgs boson decays into , and a dedicated neural-network-based tagger provides sensitivity to the boosted heavy-flavor topology. No significant excess of data over the expected background is observed, and the results are presented as upper limits on the production cross section for signals with mY between 1.5 and 6 TeV and mX between 65 and 3000 GeV.
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| 50. |
- Aad, G, et al.
(författare)
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ATLAS data quality operations and performance for 2015-2018 data-taking
- 2020
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Ingår i: Journal of Instrumentation. - : Institute of Physics Publishing (IOPP). - 1748-0221. ; 15:4
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Tidskriftsartikel (refereegranskat)abstract
- The ATLAS detector at the Large Hadron Collider reads out particle collision data from over 100 million electronic channels at a rate of approximately 100 kHz, with a recording rate for physics events of approximately 1 kHz. Before being certified for physics analysis at computer centres worldwide, the data must be scrutinised to ensure they are clean from any hardware or software related issues that may compromise their integrity. Prompt identification of these issues permits fast action to investigate, correct and potentially prevent future such problems that could render the data unusable. This is achieved through the monitoring of detector-level quantities and reconstructed collision event characteristics at key stages of the data processing chain. This paper presents the monitoring and assessment procedures in place at ATLAS during 2015-2018 data-taking. Through the continuous improvement of operational procedures, ATLAS achieved a high data quality efficiency, with 95.6% of the recorded proton-proton collision data collected at s=13 TeV certified for physics analysis.
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