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  • 201.
    Thangavel, Jayakumar
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Digital Signature: Comparative study of its usage in developed and developing countries2014Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The online trading is growing widely day by day, which makes safety the biggest concern while carrying out trading by electronic means. As many other operations can be done with digital environment and internet, operation that provides identity validation should also be added to the digital environment.

    When data are transferred, the user should make sure that there are no changes in the original data while transferring them from sender to receiver. And it has also become necessary to authenticate the users often to ensure security and to avoid fraud. There are lot of different ways of online identification, in which digital signature is considered to be one of the powerful way of authentication. So, the online user use digital signature to authenticate the sender and to maintain the integrity of the document sent.

    In this paper, a study is carried out to identify the usage of digital signature and the perspective of people towards it in developed and developing countries and a survey is taken to support the theory.

  • 202.
    Thorén, Claes
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Edenius, Mats
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Eriksson Lundström, Jenny
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Kitzmann, Andreas
    The Hipster's Dilemma: What is Analogue or Digital in the Post-Digital Society?2019In: Convergence. The International Journal of Research into New Media Technologies, ISSN 1354-8565, E-ISSN 1748-7382, Vol. 25, no 2, p. 324-339Article in journal (Refereed)
    Abstract [en]

    This article sets out to explore the phenomenon of willing digital disconnect by reconsidering and reworking some of the central ideas that currently fall under the umbrella of technological non-use. The presupposition of binary divisions between the dichotomies 'users'-'non-users' and 'analogue'-'digital' is put into question as the article explores the taking up of predigital technologies and the explicit and implicit disengagement from contemporary digital technologies. In short, this article asks: What does the contemporary revival of analogue technologies reveal about the social and material processes that constitute 'use', and what are the implications for the conceptual division of the terms analogue and digital? To answer these questions, the article draws on assemblage theory to describe the material and expressive performativity of social structure - that is, how individuals interact with technology. Empirical evidence comes from three illustrative cases where predigital technologies have replaced an existing digital alternative. Results emphasize the importance of understanding the material and expressive reconfigurations that underline technological use in a post-digital society in order to move beyond binary concepts such as analogue/digital or use/non-use as well as concepts such as the digital divide.

  • 203.
    Torres Padilla, Juan Pablo
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Inductive Program Synthesis with a Type System2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
  • 204.
    Tärnlund, Sten-Åke
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    P is not equal to NP2016Article, review/survey (Other academic)
  • 205.
    Tärnlund, Sten-Åke
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    P is not equal to NP2013Report (Other academic)
    Abstract [en]

    The problem of computing whether any formula of propositional logic is satisfiable is not in P. Therefore, P is not equal to NP. The proofs are informal about formal proofs in a first-order theory B axiomatizing Turing’s theory of computing. However, the informal proofs can be converted into formal proofs in Hilbert’s proof theory, and proved using a theorem prover.

  • 206.
    Tärnlund, Sten-Åke
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    P is not equal to NP: (seventh edition)2016Report (Other academic)
  • 207.
    Tärnlund, Sten-Åke
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Verifying that P is not equal to NP using a theorem prover2013Report (Other academic)
    Abstract [en]

    The  problem  of computing whether any formula  in propositional logic is satisfiable is not  in P .  Therefore, P  is not  equal  to  NP .  In the first- order theory B, axiomatizing Turing’s theory of computing, three versions of the proofs  are  presented.  First, an  informal  (conceptual)  proof  about formal  proofs.    Second,  a  more  formal  proof  in  Hilbert’s  proof  theory. Third, a formal  proof in Hilbert’s proof theory, using  a theorem prover.

  • 208.
    Veng, Mengkeang
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Dependency Injection and Mock on Software and Testing2014Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Software testing has been integrated within software development life cycle due to its importance in assuring software quality, software safety, and customers' satisfaction. However, problems in software testing are prominent among software developers as system grows in size and complexity. Dependency injection becomes an appealing solution for developers with its practicality to improve software design, improve testability, and enable mock testing technique. The study aims to discover the extent to which the dependency injection facilitates software design and software testing. In addition, the effect of mock practice on testing is also assessed.

    Metrics for investigation are defined and measured on various aspects of two systems. The two systems are selected and developed based on the same user requirements, development technologies, and methodologies. By comparing the two systems against the investigated metrics, we aim to reveal whether the dependency injection improve the code design. Then four test suites from both systems are evaluated in relation to testability.

    The results demonstrate that the dependency injection does not seem to improve the code design if comparing on the selected metrics. Even though it does not score better, its effect is evident in other software aspects. The testability of the two systems is similar and suffers from the same problem. Meanwhile, mock helps assist software testing and improve testability. The effect of mock technique can be witnessed, especially when it is applied with other test techniques. Explanations and discussions on these findings are addressed in the paper.

  • 209.
    Ventocilla, Elio
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Swarm-based Area Exploration and Coverage based on Pheromones and Bird Flocks2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Swarm Intelligence (SI) is a young field of study from which solutions to complex problems have been proposed based on how some natural organisms (e.g. ants, bees and others) achieve many of their daily tasks through simple sets of interactions. This thesis proposes two models for area exploration and coverage based on SI principles. These two models present a novel approach based on the combination of: ants’ pheromones, in order to keep track of visited places; and bird flocks or fish schooling, so as to move and collaborate. An implementation of both models was done in order to simulate and evaluate both the emergent behavior of the agents as well as their area exploration and coverage performance. Based on the outcome of the simulations it is concluded that both models are able to perform the exploration and coverage task and that one model is better than the other. 

  • 210.
    Vikholm, Oskar
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Flodström, Martin
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    SQL-Injections: A wake-up call for developer: A study about a major threat and issue for companies and organizations worldwide2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Injection attack is the most critical website security risk, and SQL-injection attack is the most reported injection attack on websites. This thesis strives to find an answer of why SQL-injections still remain as one of the most common website vulnerabilities. A questionnaire was conducted where companies and organizations answered several questions about their awareness, experience and knowledge of SQL-injections. After statistical analysis, results was found that indicate that there are many reasons behind SQL-injection vulnerabilities, for example many companies and organizations begins to sanitize input data after the attack, and others don’t know what SQL-injection is. This thesis will also contribute to the general awareness of SQL-injections; a wake-up call for developers, professors, researchers and students that are designing and programming databases and websites.

  • 211.
    Wahlgren Johansson, Alexander
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Löfquist, Emilie
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Enterprise Resource Planning och Best of Breed: En beskrivande studie om vad valet av IT-system kan innebära2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    IT-systems can be divided into two distinct groups, Enterprise Resource Planning (ERP) systems and Best of Breed (BoB) systems. An ERP-system is defined as a system where a number of functions are brought together and use a common database, in order to link different IT-systems. It makes it easier to access data within the organization from the users own workstation without looking through several different systems, compared to systems that work in parallel and do not collect data in a common database. BoB-systems are geared towards a specific service and are developed to be able to perform their tasks as good as possible. They are focused on their specific tasks and are not joined together through a common database, since there are different developers or vendors for the different systems. When a company is going to invest in a system there are many aspects to consider, for example whether the expected value will exceed the associated development and operating costs, and/or which system will increase the efficiency of the tasks the most. This thesis presents a case study done at Swedbank Robur AB, Sweden’s largest fund management company. The case study was carried out with the aim to find central aspects and problems with different IT-environments and the choice of systems in relation to these. Three persons with different positions and work tasks were interviewed at Robur, to give their individual opinions and a good overall picture of their system environment. A more general interview was also carried out with Microsoft’s development manager to achieve comparability with other systems and users. This thesis shows that it is not possible for large companies to only use ERP-systems, when certain functionality is specific to the company. We have also seen that the concept of ERP is very vague and can be interpreted in different ways. It is also concluded that the definition of ERP is very vauge and can thus be interpreted in several ways.

  • 212.
    Werner, Emil
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Karhu, Markus
    Testning och parprogrammering: Går det att effektivisera testning med hjälp av parprogrammering?2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this study was to investigate the possibility of streamlining the test process by utilizing pair programming. During the process, pair programming has been practiced as is defined by the Extreme programming (XP) software development methodology, with the other aspects of XP discarded. The focus of the testing itself has been toward unit testing. The methods applied has been with an experimental approach where 93 cases were attempted to be solved by either single programmers or pair programmers. What has been investigated in these experiments was the time needed to complete a case, how many test attempts were needed to solve the case, and how high a percentage of the cases were solved. These 93 cases have been investigated by the use of suitable statistical methods in order to reach a generalizable conclusion. The final conclusion of the performed study is that if two individuals successfully manages to perform pair programming, there is a possibility that their test process will be streamlined.

  • 213.
    Wietreck, Niklas
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Towards a new generation of movie recommender systems: A mood based approach2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The emergence of the content overloaded internet creates a lot of new challengesfor users and service providers a like. To minimize the displayed amount of contentlike movies, music, or other products service providers like Netflix or Amazonare using recommender systems which aim to guide the user trough the availableinformation. These systems collect knowledge about the user and try to deliver personalized experiences. Most of the state-of-the-art recommender systems are using acontent focused approach but often fail to grasp the nature of users’ desires. Therefore,a mood-as-input model is developed which combines the existing research onhuman mood identification and the emotion classification of content in the domainof movies. In order to match these two components different machine learning modelsare evaluated and a Random Forest is selected as the main matching algorithm.The results of this study indicate that the mood of a user can be used to create personalizedcontent recommendations and that it can perform better than an Arbitrarysystem.

  • 214.
    Wikström, Filip
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Frithiof, Kim
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Plattformsbaserad webbanalys: -En analys av besökarstatistik hos Flygresor.se2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Uppsatsen syftar till att undersöka besökarstatistik från Flygresor.se. Med hjälp av webbanalys har data från Google Analytics undersökts med målet att jämföra hur olika enheter och operativsystem presterar ur ett e-handelsperspektiv. Med utgångspunkt ur resultaten undersöker och analyserar vi prestandan hos de olika plattformarna. Prestandan baseras på avvisningsfrekvens och konverteringsfrekvens för e-handel. Resultaten visar bland annat på att Flygresor.se lyckats bra i sin anpassning för mobiltelefoner men sämre för surfplattor.

  • 215.
    Xiao, Chuye
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Information Quality under the lens of Practice Theory: A Case of Syskonstödjare (Sibling Supporters) in Sweden2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The awareness of having a good information quality (IQ) in organizations has been increasing in the past decades. Despite that the well-accepted definition of information quality emphasizes the fitness of information to its consumers, IQ itself is known as context sensitive (Wang and Strong, 1996). It may be perceived differently depending on different contexts. This thesis presents a study of investigating IQ under the lens of practice theory. Practice theory intends to reveal the very idea of how the nexuses of human activities are organized (Schatzki, 2001). In this thesis, IQ was interpreted under the lens of Swidler’s perspective on practice theory specifically (2001), who stresses culture as the core that lies behind every aspect of social causation. The purpose of this study is to gain an in-depth knowledge on information quality.

    The empirical setting in this study is the sibling support system in Sweden, which has a rather unique organizational context as they do not have a classic top-down organizational structure and standard working procedure. The inquiry of this study focuses on three aspects; how IQ is perceived under this particular organizational context and the reasons behind it, also whether IQ is context sensitive in this type of organization. A mixed methods research was performed as the research methodology. A questionnaire was firstly sent out to the participants, and then interviews were followed up in order to obtain more detailed information.

    The contribution includes an account on a new perception on IQ under this specific organizational setting, and why it is perceived in such a way. Also the answer to whether IQ is context sensitive in this kind of organization is argued. Further secondary findings on the issues raised from the applied questionnaire are presented, as they are unexpectedly uncovered but worth attention for future IQ studies. This study presents a new angle of perceiving IQ, which offers certain reference value to future relevant studies. 

  • 216.
    Zitoun, Isabel
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Informationssystem.
    Josefsson, Ann
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Informationssystem.
    ETL-processen: teori kontra praktik2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Abstract

    Nowadays, companies and organizations manage large amounts of data to be used as support in decision making. A good solution for data management is in the form of data warehouses. A data warehouse is used to gather information from multiple sources within a company and arrange the information in a way that makes it easy to retrieve and analyze.

     

    Designing a data warehouse is not a simple task. The study herein will focus on what a data warehouse is and how the ETL process is used for data storage in the data warehouse. ETL stands for Extract, Transform and Load and is the process that retrieves data, transforms it and finally loads it into the data warehouse. In addition to gathering information from literature we have also conducted an interview with data architect Rasmus Lindén with Know IT AB. During this interview Lindén described how Know IT AB had constructed a data warehouse for Upplands Lokaltrafik, with primary focus on how they used the ETL process to treat data to be stored in UL’s data warehouse.

     

    The purpose of this paper is to examine the theory behind the ETL process and subsequently investigate how it may be applied by comparing the theory and how the company Know IT AB has applied it when designing data warehouses. One of the observations we made is that the theory we have studied fails to mention or illustrate some factors we during our interview found were considered important in designing data warehouses.

  • 217.
    Ågerfalk, Pär
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Stimulating academic discourse: a call for response2019In: European Journal of Information Systems, ISSN 0960-085X, E-ISSN 1476-9344, Vol. 28, no 1, p. 1-5Article in journal (Other academic)
  • 218.
    Ågerfalk, Pär
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media.
    Eriksson, Owen
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    The Stolen Identifier: An Inquiry into the Nature of Identification and the Ontological Status of Information Systems2011In: Proceedings of the 2011 International Conference on Information Systems (ICIS 2011), Shanghai, China, December 4–7, 2011., Association for Information Systems, 2011Conference paper (Refereed)
    Abstract [en]

    Based on real-world examples of identity theft, and particularly a recent incident in Sweden, this paper explores the nature of identification from a social ontology point of view. This is contrasted with the traditional representational view, which is shown unable to handle critical aspects related to institutional control of identifiers and identity. Specifically, the paper shows that identification and the definition and allocation of identifiers is an institutional and political rather than scientific process, and that since “identity” in itself is a social construct, the process of identification depends on the institutional context in which the objects to identify exist as valid institutional facts. These institutional objects are often originally generated by the use of information systems, which means that genuine real-world institutional objects and their identifiers can be found within these information systems. This implies that the representational view of information systems with a sharp distinction between the real world outside the information system and the system itself (only seen as a model or perceived state of that real world) cannot be maintained.

  • 219.
    Ågerfalk, Pär
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Wiberg, Mikael
    Umeå universitet.
    Pragmatizing the normative artifact: Design science research in Scandinavia and beyond2018In: Communications of the Association for Information Systems, ISSN 1529-3181, E-ISSN 1529-3181, Vol. 43, p. 68-77Article in journal (Refereed)
    Abstract [en]

    In this panel report, we analyze the discussion that unfolded during the “Design Science Research: A Scandinavian Approach?” panel held at the third Scandinavian Conference on Information Systems in Sigtuna, Sweden, in August, 2012. The second author of this paper chaired the panel, which also included Tone Bratteteig, Shirley Gregor, Ola Henfridsson, Alan Hevner, Jan Pries-Heje, and Tuure Tuunanen as panelists. Three themes that highlight how the design of artifacts contributes to knowledge production emerged during the panel. The first theme addresses our responsibility, as a research community, to come up not only with descriptions of the world but also to try to change things into preferable states. The second theme emphasizes that knowledge production also happens through the design of artifacts. The third theme identifies an apparent pragmatic turn in our discipline.

  • 220.
    Ågerfalk, Pär
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Wiberg, Mikael
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media. Umeå universitet.
    Pragmatizing the normative artifact: Design science research in Scandinavia and beyond2018In: Communications of the Association for Information Systems, ISSN 1529-3181, E-ISSN 1529-3181, p. 68-77Article in journal (Refereed)
    Abstract [en]

    In this panel report, we analyze the discussion that unfolded during the “Design Science Research: A Scandinavian Approach?” panel held at the third Scandinavian Conference on Information Systems in Sigtuna, Sweden, in August, 2012. The second author of this paper chaired the panel, which also included Tone Bratteteig, Shirley Gregor, Ola Henfridsson, Alan Hevner, Jan Pries-Heje, and Tuure Tuunanen as panelists. Three themes that highlight how the design of artifacts contributes to knowledge production emerged during the panel. The first theme addresses our responsibility, as a research community, to come up not only with descriptions of the world but also to try to change things into preferable states. The second theme emphasizes that knowledge production also happens through the design of artifacts. The third theme identifies an apparent pragmatic turn in our discipline.

  • 221.
    Åhlin, Daniel
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Att förebygga förändringsmotstånd i en organisation i samband med IT-implementation2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    En stor utmaning för många organisationer och företag i samband med implementation av informationssystem är förändringsmotstånd. Förändringsmotstånd kan bli problematiskt ur en organisatorisk synvinkel om det oppositionella beteendet leder till minskad effektivitet och produktivitet. Denna studie inbegriper en kvalitativ undersökning av en organisation som genomgick en omfattande digitaliseringsprocess varav förändringsmotstånd som faktor visade sig vålla stor problematik. Studien visar att en organisation redan innan en IT-implementation inleds bör inventera sin egen förändrings- och IT-mognad. Det är även viktigt att som organisation utforma en tydlig kravbild gentemot IT-leverantören gällande den nya systemlösningen. Slutligen bör en organisation utarbeta en intern kommunikationsplan för att på ett tydligare sätt kunna lyfta fördelar med de nya informationssystemen inom den egna organisationen.

  • 222.
    Östergren, Jonathan
    et al.
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Litsesiö, Daniel
    Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Informatics and Media, Information Systems.
    Adoptionen av mobila betalningssätt i Sverige2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Cash payments is steadily decreasing today in sweden while at the same time  contactless and mobile payment methods are steadily increasing. 2017 was the first year the use of mobile payment methods surpassed the use of cash and the same year the majority stopped carrying cash on hand. The release of NFC/RFID based mobile payment methods like Samsung and Apple Pay may be the next step towards a cashless society. With the already developed and popular payment methods in Sweden like Swish and contactless credit cards the trends observed in the rest of europe may differ from Sweden’s. There is a lack of research in how swedish users perceive mobile payment methods and what factors influence their decisions of a potential adoption. This study aims to evaluate what factors influence swedish users and how these factors affect the potential adoption of mobile payment methods.  The study has conducted a qualitative approach gathering data from four interviews with swedish nonusers of the technology. The analysis is based on Rogers’s innovation diffusion theory (IDT). 9 factors that influence swedish users were found. These are, ignorance, benefit, simplicity, supporting infrastructure, security and risks, integrity, trust, social influences, and alternative payment methods. The factors influence the potential adoption in a positive or a negative way. Compatibility, complexity and communication channels was identified to affect the adoption in a mostly positive way  while benefit, testability and observability were mostly negative. 

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