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  • 1.
    Viebke, Andre
    et al.
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    Memeti, Suejb
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    Pllana, Sabri
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    Abraham, Ajith
    Machine Intelligence Research Labs (MIR Labs), USA.
    CHAOS: A Parallelization Scheme for Training Convolutional Neural Networks on Intel Xeon Phi2019Ingår i: Journal of Supercomputing, ISSN 0920-8542, E-ISSN 1573-0484, Vol. 75, nr 1, s. 197-227Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Deep learning is an important component of big-data analytic tools and intelligent applications, such as, self-driving cars, computer vision, speech recognition, or precision medicine. However, the training process is computationally intensive, and often requires a large amount of time if performed sequentially. Modern parallel computing systems provide the capability to reduce the required training time of deep neural networks.In this paper, we present our parallelization scheme for training convolutional neural networks (CNN) named Controlled Hogwild with Arbitrary Order of Synchronization (CHAOS). Major features of CHAOS include the support for thread and vector parallelism, non-instant updates of weight parameters during back-propagation without a significant delay, and implicit synchronization in arbitrary order. CHAOS is tailored for parallel computing systems that are accelerated with the Intel Xeon Phi. We evaluate our parallelization approach empirically using measurement techniques and performance modeling for various numbers of threads and CNN architectures. Experimental results for the MNIST dataset of handwritten digits using the total number of threads on the Xeon Phi show speedups of up to 103x compared to the execution on one thread of the Xeon Phi, 14x compared to the sequential execution on Intel Xeon E5, and 58x compared to the sequential execution on Intel Core i5.

  • 2.
    Laitinen, Mikko
    et al.
    Linnéuniversitetet, Fakulteten för konst och humaniora (FKH), Institutionen för språk (SPR). DISA.
    Levin, Magnus
    Linnéuniversitetet, Fakulteten för konst och humaniora (FKH), Institutionen för språk (SPR). DISA.
    Lakaw, Alexander
    Linnéuniversitetet, Fakulteten för konst och humaniora (FKH), Institutionen för språk (SPR). DISA.
    Charting new sources of lingua franca data: A multi-genre corpus approach2019Ingår i: From Data to Evidence in English Language Research / [ed] Carla, Suhr, Terttu Nevalainen and Irma Taavitsainen, Leiden: Brill Academic Publishers, 2019, s. 326-350Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    The article discusses research that charts new lingua franca English data and broadensthe scope of written elf corpora. We illustrate that, apart from the academic domain,there exist various written genres in non-native contexts in which English is used as asecond language resource alongside native languages. These uncharted data can provideus with new ways of approaching the ongoing globalization of English. The newapproach incorporates a broader perspective on elf than previously, seeing it as onestage in the long diachronic continuum of Englishes rather than as an entity emergingin interaction. The first part details a corpus project that produces written multi-genrecorpora suitable for real-time studies of how ongoing variability is reflected in linguafranca use. It is followed by three case studies investigating quantitative patterns ofongoing change in elf. The conclusions suggest that a diachronically-informed angleto lingua franca use offers a new vantage point not only to elf but also to ongoinggrammatical variability. It shows that the traditional and canonized way of seeing nonnativespeakers/writers is not sufficient, nor is the simplified view of norm dependency of non-native individuals.

  • 3.
    Bravo, Giangiacomo
    et al.
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Grimaldo, Francisco
    Univ Valencia, Spain.
    Lopez-Inesta, Emilia
    Univ Valencia, Spain.
    Mehmani, Bahar
    Elsevier,Netherlands.
    Squazzoni, Flaminio
    Univ Milan, Italy.
    The effect of publishing peer review reports on referee behavior in five scholarly journals2019Ingår i: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 10, artikel-id 322Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    To increase transparency in science, some scholarly journals are publishing peer review reports. But it is unclear how this practice affects the peer review process. Here, we examine the effect of publishing peer review reports on referee behavior in five scholarly journals involved in a pilot study at Elsevier. By considering 9,220 submissions and 18,525 reviews from 2010 to 2017, we measured changes both before and during the pilot and found that publishing reports did not significantly compromise referees' willingness to review, recommendations, or turn-around times. Younger and non-academic scholars were more willing to accept to review and provided more positive and objective recommendations. Male referees tended to write more constructive reports during the pilot. Only 8.1% of referees agreed to reveal their identity in the published report. These findings suggest that open peer review does not compromise the process, at least when referees are able to protect their anonymity.

  • 4.
    Memeti, Suejb
    et al.
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    Pllana, Sabri
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    A machine learning approach for accelerating DNA sequence analysis2018Ingår i: The international journal of high performance computing applications, ISSN 1094-3420, E-ISSN 1741-2846, Vol. 32, nr 3, s. 363-379Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The DNA sequence analysis is a data and computationally intensive problem and therefore demands suitable parallel computing resources and algorithms. In this paper, we describe an optimized approach for DNA sequence analysis on a heterogeneous platform that is accelerated with the Intel Xeon Phi. Such platforms commonly comprise one or two general purpose host central processing units (CPUs) and one or more Xeon Phi devices. We present a parallel algorithm that shares the work of DNA sequence analysis between the host CPUs and the Xeon Phi device to reduce the overall analysis time. For automatic worksharing we use a supervised machine learning approach, which predicts the performance of DNA sequence analysis on the host and device and accordingly maps fractions of the DNA sequence to the host and device. We evaluate our approach empirically using real-world DNA segments for human and various animals on a heterogeneous platform that comprises two 12-core Intel Xeon E5 CPUs and an Intel Xeon Phi 7120P device with 61 cores.

  • 5.
    Memedi, Mevludin
    et al.
    Örebro University.
    Tshering, Gaki
    Örebro University.
    Fogelberg, Martin
    Örebro University.
    Jusufi, Ilir
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    Kolkowska, Ella
    Örebro University.
    Klein, Gunnar O.
    Örebro University.
    An interface for IoT: feeding back health-related data to Parkinson's disease patients2018Ingår i: Journal of Sensor and Actuator Networks, E-ISSN 2224-2708, Vol. 7, nr 1, s. 1-16, artikel-id 14Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper presents a user-centered design (UCD) process of an interface for Parkinson’s disease (PD) patients for helping them to better manage their symptoms. The interface is designed to visualize symptom and medication information, collected by an Internet of Things (IoT)-based system, which will consist of a smartphone, electronic dosing device, wrist sensor and a bed sensor. In our work, the focus is on measuring data related to some of the main health-related quality of life aspects such as motor function, sleep, medication compliance, meal intake timing in relation to medication intake, and physical exercise. A mock-up demonstrator for the interface was developed using UCD methodology in collaboration with PD patients. The research work was performed as an iterative design and evaluation process based on interviews and observations with 11 PD patients. Additional usability evaluations were conducted with three information visualization experts. Contributions include a list of requirements for the interface, results evaluating the performance of the patients when using the demonstrator during task-based evaluation sessions as well as opinions of the experts. The list of requirements included ability of the patients to track an ideal day, so they could repeat certain activities in the future as well as determine how the scores are related to each other. The patients found the visualizations as clear and easy to understand and could successfully perform the tasks. The evaluation with experts showed that the visualizations are in line with the current standards and guidelines for the intended group of users. In conclusion, the results from this work indicate that the proposed system can be considered as a tool for assisting patients in better management of the disease by giving them insights on their own aggregated symptom and medication information. However, the actual effects of providing such feedback to patients on their health-related quality of life should be investigated in a clinical trial.

  • 6.
    Golub, Koraljka
    et al.
    Linnéuniversitetet, Fakulteten för konst och humaniora (FKH), Institutionen för kulturvetenskaper (KV).
    Hagelbäck, Johan
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    Ardö, Anders
    Lund University.
    Automatic classification using DDC on the Swedish Union Catalogue2018Ingår i: Proceedings of the 18th European Networked Knowledge Organization Systems (NKOS 2018) Workshop, Porto, Portugal, September 13, 2018 / [ed] Philipp Mayr, Douglas Tudhope, Joseph Busch, Koraljka Golub, Marjorie Hlava & Marcia Zeng, CEUR-WS.org , 2018, s. 4-16Konferensbidrag (Refereegranskat)
    Abstract [en]

    With more and more digital collections of various information re- sources becoming available, also increasing is the challenge of assigning subject index terms and classes from quality knowledge organization systems. While the ultimate purpose is to understand the value of automatically produced Dewey Decimal Classification (DDC) classes for Swedish digital collections, the paper aims to evaluate the performance of two machine learning algorithms for Swe- dish catalogue records from the Swedish union catalogue (LIBRIS). The algo- rithms are tested on the top three hierarchical levels of the DDC. Based on a data set of 143,838 records, evaluation shows that Support Vector Machine with linear kernel outperforms Multinomial Naïve Bayes algorithm. Also, using keywords or combining titles and keywords gives better results than using only titles as input. The class imbalance where many DDC classes only have few records greatly affects classification performance: 81.37% accuracy on the training set is achieved when at least 1,000 records per class are available, and 66.13% when few records on which to train are available. Proposed future research involves an exploration of the intellectual effort put into creating the DDC to further improve the algorithm performance as commonly applied in string matching, and to test the best approach on new digital collections that do not have DDC assigned.

  • 7.
    Farjam, Mike
    et al.
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Kirchkamp, Oliver
    University of Jena, Germany.
    Bubbles in hybrid markets: How expectations about algorithmic trading affect human trading2018Ingår i: Journal of Economic Behavior and Organization, ISSN 0167-2681, E-ISSN 1879-1751, Vol. 146, s. 248-269Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Bubbles are omnipresent in lab experiments with asset markets. Most of these experiments are conducted in environments with only human traders. Since today's markets are substantially determined by algorithmic trading, we use a laboratory experiment to measure how human trading depends on the expected presence of algorithmic traders. We find that bubbles are clearly smaller when human traders expect algorithmic traders to be present.

  • 8.
    Nevalainen, Terttu
    et al.
    University of Helsinki, Finland.
    Laitinen, Mikko
    University of Eastern Finland, Finland.
    Nevala, Minna
    University of Tampere, Finland.
    Numi, Arja
    University of Tampere, Finland.
    Changes in different stages: From nearing completion to completed2018Ingår i: Patterns of Change in 18th-century English: A sociolinguistic approach / [ed] Terttu Nevalainen, Minna Palander-Collin, Tanja Säily, Amsterdam: John Benjamins Publishing Company, 2018, s. 251-256Kapitel i bok, del av antologi (Refereegranskat)
  • 9.
    Bravo, Giangiacomo
    et al.
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Yantseva, Victoria
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Cooperation and conflict in segregated populations2018Ingår i: Social science computer review, ISSN 0894-4393, E-ISSN 1552-8286Artikel i tidskrift (Refereegranskat)
  • 10.
    Farjam, Mike
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Nikolaychuk, Olexandr
    Dataset fo Investing into climate change mitigation initiatives despite the risk of failure: Version 2.02018Dataset
  • 11.
    Farjam, Mike
    et al.
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Nikolaychuk, Olexandr
    Friedrich Schiller Univ, Germany.
    Bravo, Giangiacomo
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Does risk communication really decrease cooperation in climate change mitigation?2018Ingår i: Climatic Change, ISSN 0165-0009, E-ISSN 1573-1480, Vol. 149, nr 2, s. 147-158Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Effective communication of risks involved in the climate change discussion is crucial and despite ambitious protection policies, the possibility of irreversible consequences actually occurring can only be diminished but never ruled out completely. We present a laboratory experiment that studies how residual risk of failure of climate change policies affects willingness to contribute to such policies. Despite prevailing views on people's risk aversion, we found that contributions were higher at least in the final part of treatments including a residual risk. We interpret this as the product of a psychological process where residual risk puts participants into an "alarm mode," keeping their contributions high. We discuss the broad practical implications this might have on the real-world communication of climate change.

  • 12.
    Kucher, Kostiantyn
    et al.
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM), Institutionen för datavetenskap (DV).
    Paradis, Carita
    Lund University.
    Kerren, Andreas
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM), Institutionen för datavetenskap (DV).
    DoSVis: Document Stance Visualization2018Ingår i: Proceedings of the 13th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications (VISIGRAPP '18) / [ed] Alexandru C. Telea, Andreas Kerren, and José Braz, SciTePress, 2018, Vol. 3, s. 168-175Konferensbidrag (Refereegranskat)
    Abstract [en]

    Text visualization techniques often make use of automatic text classification methods. One of such methods is stance analysis, which is concerned with detecting various aspects of the writer’s attitude towards utterances expressed in the text. Existing text visualization approaches for stance classification results are usually adapted to textual data consisting of individual utterances or short messages, and they are often designed for social media or debate monitoring tasks. In this paper, we propose a visualization approach called DoSVis (Document Stance Visualization) that focuses instead on individual text documents of a larger length. DoSVis provides an overview of multiple stance categories detected by our classifier at the utterance level as well as a detailed text view annotated with classification results, thus supporting both distant and close reading tasks. We describe our approach by discussing several application scenarios involving business reports and works of literature. 

  • 13.
    Martins, Rafael Messias
    et al.
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    Kerren, Andreas
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    Efficient Dynamic Time Warping for Big Data Streams2018Ingår i: Proceedings of the IEEE International Conference on Big Data (Big Data '18): Workshop on Real-time & Stream Analytics in Big Data & Stream Data Management, IEEE, 2018, s. 2924-2929Konferensbidrag (Refereegranskat)
    Abstract [en]

    Many common data analysis and machine learning algorithms for time series, such as classification, clustering, or dimensionality reduction, require a distance measurement between pairs of time series in order to determine their similarity. A variety of measures can be found in the literature, each with their own strengths and weaknesses, but the Dynamic Time Warping (DTW) distance measure has occupied an important place since its early applications for the analysis and recognition of spoken word. The main disadvantage of the DTW algorithm is, however, its quadratic time and space complexity, which limits its practical use to relatively small time series. This issue is even more problematic when dealing with streaming time series that are continuously updated, since the analysis must be re-executed regularly and with strict running time constraints. In this paper, we describe enhancements to the DTW algorithm that allow it to be used efficiently in a streaming scenario by supporting an append operation for new time steps with a linear complexity when an exact, error-free DTW is needed, and even better performance when either a Sakoe-Chiba band is used, or when a sliding window is the desired range for the data. Our experiments with one synthetic and four natural data sets have shown that it outperforms other DTW implementations and the potential errors are, in general, much lower than another state-of-the-art approximated DTW technique.

  • 14.
    Loxbo, Karl
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för statsvetenskap (ST).
    Ethnic diversity, out-group contacts and social trust in a high-trust society2018Ingår i: Acta Sociologica, ISSN 0001-6993, E-ISSN 1502-3869, Vol. 61, nr 2, s. 182-201Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Although ethnic diversity is widely believed to undermine social trust, several scholars have argued that this outcome ultimately depends on the extent of high-quality contacts between diverse groups as well as the extent of equality in society. This article scrutinises these different hypotheses by exploring the association between ethnic diversity and social trust among Swedish schoolchildren. Building on data from Sweden, where legacies of equality would be expected to provide unique opportunities for building trust among diverse groups, the contribution of the article to the literature is twofold. First, it was found that contextual diversity is only weakly related to adolescents’ trust. Furthermore, while interactions revealed that a higher socio-economic level in a classroom reinforces, rather than cushions, the adverse effect, it is concluded that contextual measures obscure the micro-level dynamic underlying the association between diversity and trust in classrooms. Second, when accounting for compositional effects, and the distinction between in-group and out-group contact, the findings strongly supported the conflict hypothesis, while rejecting the contact hypothesis. The principal finding is that ethnic diversity in a classroom undermines social trust among native-born adolescents, whereas the effect is the exact opposite for minorities. In addition, social trust is only promoted if adolescents interact with members of their ethnic in-group. Because these disconcerting results were found in the high-trust context of Sweden, it is suggested that similar findings are likely in less favourable settings. The article concludes by arguing that the high levels of social trust in traditionally homogenous, but increasingly segregated, countries such as Sweden may conceal the fact that individuals primarily include others who are similar to themselves in their ‘imagined communities’.

  • 15.
    Stevenson-Ågren, Jean
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO). University of Sheffield, UK.
    Israelsson, Johan
    Linnéuniversitetet, Fakulteten för teknik (FTK), Sjöfartshögskolan (SJÖ). Kalmar County Hospital ; Linköping University.
    Petersson, Göran
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO).
    Bath, Peter
    University of Sheffield, UK.
    Factors influencing the quality of vital signs data in electronic health records: a qualitative study2018Ingår i: Journal of Clinical Nursing, ISSN 0962-1067, E-ISSN 1365-2702, Vol. 27, nr 5-6, s. 1276-1286Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Aims and objectives

    To investigate reasons for inadequate documentation of vital signs in an electronic health record.

    Background

    Monitoring vital signs is crucial to detecting and responding to patient deterioration. The ways in which vital signs are documented in electronic health records have received limited attention in the research literature. A previous study revealed that vital signs in an electronic health record were incomplete and inconsistent.

    Design

    Qualitative study.

    Methods

    Qualitative study. Data were collected by observing (68 hr) and interviewing nurses (n = 11) and doctors (n = 3), and analysed by thematic analysis to examine processes for measuring, documenting and retrieving vital signs in four clinical settings in a 353-bed hospital.

    Results

    We identified two central reasons for inadequate vital sign documentation. First, there was an absence of firm guidelines for observing patients’ vital signs, resulting in inconsistencies in the ways vital signs were recorded. Second, there was a lack of adequate facilities in the electronic health record for recording vital signs. This led to poor presentation of vital signs in the electronic health record and to staff creating paper “workarounds.”

    Conclusions

    This study demonstrated inadequate routines and poor facilities for vital sign documentation in an electronic health record, and makes an important contribution to knowledge by identifying problems and barriers that may occur. Further, it has demonstrated the need for improved facilities for electronic documentation of vital signs.

    Relevance to clinical practice

    Patient safety may have been compromised because of poor presentation of vital signs. Thus, our results emphasised the need for standardised routines for monitoring patients. In addition, designers should consult the clinical end-users to optimise facilities for electronic documentation of vital signs. This could have a positive impact on clinical practice and thus improve patient safety.

  • 16.
    Palander-Collin, Minna
    et al.
    University of Helsinki, Finland.
    Laitinen, Mikko
    University of Eastern Finland, Finland.
    Sairio, Anni
    University of Helsinki, Finland.
    Säily, Tanja
    University of Helsinki, Finland.
    From incipient to mid-range and beyond2018Ingår i: Patterns of Change in 18th-century English: A sociolinguistic approach / [ed] Terttu Nevalainen, Minna Palander-Collin, Tanja Säily, Amsterdam: John Benjamins Publishing Company, 2018, s. 246-252Kapitel i bok, del av antologi (Refereegranskat)
  • 17.
    Laitinen, Mikko
    et al.
    University of Eastern Finland, Finland.
    Säily, Tanja
    University of Helsinki, Finland.
    Google Books: A shortcut to studying language variability?2018Ingår i: Patterns of Change in 18th-century English: A sociolinguistic approach / [ed] Terttu Nevalainen, Minna Palander-Collin, Tanja Säily, Amsterdam: John Benjamins Publishing Company, 2018, s. 225-235Kapitel i bok, del av antologi (Refereegranskat)
  • 18.
    Bravo, Giangiacomo
    et al.
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Farjam, Mike
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Moreno, Francisco Grimaldo
    University of Valencia, Spain.
    Birukou, Aliaksandr
    Springer Nature, Germany.
    Squazzoni, Flaminio
    University of Brescia, Italy.
    Hidden connections: Network effects on editorial decisions in four computer science journals2018Ingår i: Journal of Informetrics, ISSN 1751-1577, E-ISSN 1875-5879, Vol. 12, nr 1, s. 101-112Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper aims to examine the influence of authors’ reputation on editorial bias in scholarly journals. By looking at eight years of editorial decisions in four computer science journals, including 7179 observations on 2913 submissions, we reconstructed author/referee-submission networks. For each submission, we looked at reviewer scores and estimated the reputation of submission authors by means of their network degree. By training a Bayesian network, we estimated the potential effect of scientist reputation on editorial decisions. Results showed that more reputed authors were less likely to be rejected by editors when they submitted papers receiving negative reviews. Although these four journals were comparable for scope and areas, we found certain journal specificities in their editorial process. Our findings suggest ways to examine the editorial process in relatively similar journals without recurring to in-depth individual data, which are rarely available from scholarly journals.

  • 19.
    Laitinen, Mikko
    University of Helsinki, Finland.
    Indefinite pronouns with singular human reference: Recessive and ongoing2018Ingår i: Patterns of Change in 18th-century English: A sociolinguistic approach / [ed] Terttu Nevalainen, Minna Palander-Collin, Tanja Säily, Amsterdam: John Benjamins Publishing Company, 2018, s. 137-158Kapitel i bok, del av antologi (Refereegranskat)
  • 20.
    Gimenez, Alfredo
    et al.
    University of California, USA.
    Gamblin, Todd
    Lawrence Livermore National Laboratory, USA.
    Jusufi, Ilir
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    Bhatele, Abhinav
    Lawrence Livermore National Laboratory, USA.
    Schulz, Martin
    Lawrence Livermore National Laboratory, USA.
    Bremer, Peer-Timo
    Lawrence Livermore National Laboratory, USA.
    Hamann, Bernd
    University of California, USA.
    MemAxes: Visualization and Analytics for Characterizing Complex Memory Performance Behaviors2018Ingår i: IEEE Transactions on Visualization and Computer Graphics, ISSN 1077-2626, E-ISSN 1941-0506, Vol. 24, nr 7, s. 2180-2193Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Memory performance is often a major bottleneck for high-performance computing (HPC) applications. Deepening memory hierarchies, complex memory management, and non-uniform access times have made memory performance behavior difficult to characterize, and users require novel, sophisticated tools to analyze and optimize this aspect of their codes. Existing tools target only specific factors of memory performance, such as hardware layout, allocations, or access instructions. However, today's tools do not suffice to characterize the complex relationships between these factors. Further, they require advanced expertise to be used effectively. We present MemAxes, a tool based on a novel approach for analytic-driven visualization of memory performance data. MemAxes uniquely allows users to analyze the different aspects related to memory performance by providing multiple visual contexts for a centralized dataset. We define mappings of sampled memory access data to new and existing visual metaphors, each of which enabling a user to perform different analysis tasks. We present methods to guide user interaction by scoring subsets of the data based on known performance problems. This scoring is used to provide visual cues and automatically extract clusters of interest. We designed MemAxes in collaboration with experts in HPC and demonstrate its effectiveness in case studies.

  • 21.
    Auer, Anita
    et al.
    University of Lausanne.
    Laitinen, Mikko
    Linnéuniversitetet, Fakulteten för konst och humaniora (FKH), Institutionen för språk (SPR). DISA.
    Mobility, variability and changing literacies in Modern times2018Ingår i: Neuphilologische Mitteilungen, ISSN 0028-3754, Vol. 119, nr 1, s. 13-20Artikel i tidskrift (Övrigt vetenskapligt)
  • 22.
    Auer, Anita
    et al.
    University of Lausanne.
    Laitinen, MikkoLinnéuniversitetet, Fakulteten för konst och humaniora (FKH), Institutionen för språk (SPR). DISA.
    Mobility, Variability and Changing Literacies in Modern Times2018Samlingsverk (redaktörskap) (Refereegranskat)
  • 23.
    Johansson Östbring, Malin
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO). Kalmar County Council.
    Eriksson, Tommy
    Malmö University;Norwegian University of Sciences and Technology, Norway.
    Petersson, Göran
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO).
    Hellström, Lina
    Kalmar County Council.
    Motivational Interviewing and Medication Review in Coronary Heart Disease (MIMeRiC): Intervention Development and Protocol for the Process Evaluation.2018Ingår i: JMIR Research Protocols, ISSN 1929-0748, E-ISSN 1929-0748, Vol. 7, nr 1, s. 1-12, artikel-id e21Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND: Trials of complex interventions are often criticized for being difficult to interpret because the effects of apparently similar interventions vary across studies dependent on context, targeted groups, and the delivery of the intervention. The Motivational Interviewing and Medication Review in Coronary heart disease (MIMeRiC) trial is a randomized controlled trial (RCT) of an intervention aimed at improving pharmacological secondary prevention. Guidelines for the development and evaluation of complex interventions have recently highlighted the need for better reporting of the development of interventions, including descriptions of how the intervention is assumed to work, how this theory informed the process evaluation, and how the process evaluation relates to the outcome evaluation.

    OBJECTIVE: This paper aims to describe how the intervention was designed and developed. The aim of the process evaluation is to better understand how and why the intervention in the MIMeRiC trial was effective or not effective.

    METHODS: The research questions for evaluating the process are based on the conceptual model of change processes assumed in the intervention and will be analyzed by qualitative and quantitative methods. Quantitative data are used to evaluate the medication review in terms of drug-related problems, to describe how patients' beliefs about medicines are affected by the intervention, and to evaluate the quality of motivational interviewing. Qualitative data will be used to analyze whether patients experienced the intervention as intended, how cardiologists experienced the collaboration and intervention, and how the intervention affected patients' overall experience of care after coronary heart disease.

    RESULTS: The development and piloting of the intervention are described in relation to the theoretical framework. Data for the process evaluation will be collected until March 2018. Some process evaluation questions will be analyzed before, and others will be analyzed after the outcomes of the MIMeRiC RCT are known.

    CONCLUSIONS: This paper describes the framework for the design of the intervention tested in the MIMeRiC trial, development of the intervention from the pilot stage to the complete trial intervention, and the framework and methods for the process evaluation. Providing the protocol of the process evaluation allows prespecification of the processes that will be evaluated, because we hypothesize that they will determine the outcomes of the MIMeRiC trial. This protocol also constitutes a contribution to the new field of process evaluations as made explicit in health services research and clinical trials of complex interventions.

  • 24.
    Johansson Östbring, Malin
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO). Kalmar County Council.
    Eriksson, Tommy
    Malmö University;Norweigan University of Sciences and Technology, Norway.
    Petersson, Göran
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO).
    Hellström, Lina
    Kalmar County Council.
    Motivational Interviewing and Medication Review in Coronary Heart Disease (MIMeRiC): Protocol for a Randomized Controlled Trial Investigating Effects on Clinical Outcomes, Adherence, and Quality of Life.2018Ingår i: JMIR Research Protocols, ISSN 1929-0748, E-ISSN 1929-0748, Vol. 7, nr 2, s. 1-15, artikel-id e57Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND: Preventive treatment goals for blood pressure and cholesterol levels continue to be unmet for many coronary patients. The effect of drug treatment depends on both its appropriateness and the patients' adherence to the treatment regimen. There is a need for adherence interventions that have a measurable effect on clinical outcomes.

    OBJECTIVE: This study aims to evaluate the effects on treatment goals of an intervention designed to improve patient adherence and treatment quality in secondary prevention of coronary heart disease. A protocol for the prespecified process evaluation of the trial is published separately.

    METHODS: The Motivational Interviewing and Medication Review in Coronary heart disease (MIMeRiC) trial is a prospective, randomized, outcomes-blinded trial designed to compare individualized follow-up by a clinical pharmacist using motivational interviewing (MI) and medication review with standard follow-up. Patients were randomized to 2 groups after stratification according to their beliefs about medicines. After standard follow-up at the cardiology clinic, patients in the intervention group are seen individually by a clinical pharmacist 2 to 5 times as required over 7 months, at the clinic. The pharmacist reviews each patient's medication and uses MI to manage any problems with prescribing and adherence. The primary study outcome is the proportion of patients who have reached the treatment goal for low-density lipoprotein cholesterol by 12 months after discharge. Secondary outcomes are the effects on patient adherence, systolic blood pressure, disease-specific quality of life, and health care use.

    RESULTS: The protocol for this study was approved by the Regional Ethics Committee, Linköping, in 2013. Enrollment started in October 2013 and ended in December 2016 when 417 patients had been included. Follow-up data collection will conclude in March 2018. Publication of the primary and secondary outcome results from the MIMeRiC trial is anticipated in 2019.

    CONCLUSIONS: The MIMeRiC trial will assess the effectiveness of an intervention involving medication reviews and individualized support. The results will inform the continued development of support for this large group of patients who use preventive medicines for lifelong treatment. The design of this adherence intervention is based on a theoretical framework and is the first trial of an intervention that uses beliefs about medicines to individualize the intervention protocol.

    TRIAL REGISTRATION: ClinicalTrials.gov NCT02102503; https://clinicaltrials.gov/ct2/show/NCT02102503 (Archived by WebCite at http://www.webcitation.org/6x7iUDohy).

  • 25. Drvenica, Ivana
    et al.
    Bravo, Giangiacomo
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Vejmelka, Lucija
    Dekanski, Aleksandar
    Nedić, Olgica
    Peer review of reviewers: the author’s perspective2018Ingår i: Publications, E-ISSN 2304-6775, Vol. 7, nr 1, s. 1-10, artikel-id 1Artikel i tidskrift (Refereegranskat)
  • 26.
    Laitinen, Mikko
    University of Eastern Finland, Finland.
    Placing ELF among the varieties of English: Observations from typological profiling2018Ingår i: Modelling World Englishes in the 21st century: Assessing the interplay of emancipation and globalization of ESL varieties / [ed] Sandra C. Deshors, Amsterdam: John Benjamins Publishing Company, 2018, s. 109-131Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    This study investigates how (dis)similar ELF is structurally from the core nativevarieties of English, indigenized L2 varieties, and learner English. ELF is understoodas second language use of English in settings where the interactants do notnecessarily share a first language. The empirical part makes use of the method oftypological profiling based on aggregate structural features. This method measuresthree indices (i.e. grammaticity, analyticity, and syntheticity), and it hasbeen used previously to analyze a range of variety types but has not been appliedto the assessment of ELF. The results provide quantitative evidence that placesELF on the map and shows that, on purely structural grounds, ELF is a distinctvariety type among English varieties. Moreover, the observations show that ELFis structurally different from second language acquisition, and there is a quantitativebasis for drawing a distinction between ELF and traditional learner data.

  • 27.
    Takács, Károly
    et al.
    Hungarian Acad Sci, Hungary.
    Bravo, Giangiacomo
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Squazzoni, Flaminio
    Univ Brescia, Italy.
    Referrals and information flow in networks increase discrimination: A laboratory experiment2018Ingår i: Social Networks, ISSN 0378-8733, E-ISSN 1879-2111, Vol. 54, s. 254-265Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Referrals and information flow distort market mechanisms of hiring in the labor market, but they might assist employers under asymmetric information infinding better alternatives. This paper investigates whether an impartial information flow between employers in a cyclic network structure could generate more discrimination than when no information is exchanged between employers. We set up an artificial labor market in which there was no average quality difference between two categories of workers. We asked participants to play the role of employers and examined the partiality of their hiring choices. Results showed that discrimination was prevalent in all conditions. Higher standards by the employers for the quality of workers increased discrimination as did the presence of referrals from workers. Unexpectedly, impartial information flow in a cyclic network of employers did not help to decrease discrimination. We also showed that these mechanisms interact with and subdue each other in complex ways.

  • 28.
    Österlund, Erik
    et al.
    Oracle.
    Löwe, Welf
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM), Institutionen för datavetenskap (DV).
    Self-adaptive concurrent components2018Ingår i: Automated Software Engineering: An International Journal, ISSN 0928-8910, E-ISSN 1573-7535, Vol. 25, nr 1, s. 47-99Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Selecting the optimum component implementation variant is sometimes difficult since it depends on the component's usage context at runtime, e.g., on the concurrency level of the application using the component, call sequences to the component, actual parameters, the hardware available etc. A conservative selection of implementation variants leads to suboptimal performance, e.g., if a component is conservatively implemented as thread-safe while during the actual execution it is only accessed from a single thread. In general, an optimal component implementation variant cannot be determined before runtime and a single optimal variant might not even exist since the usage contexts can change significantly over the runtime. We introduce self-adaptive concurrent components that automatically and dynamically change not only their internal representation and operation implementation variants but also their synchronization mechanism based on a possibly changing usage context. The most suitable variant is selected at runtime rather than at compile time. The decision is revised if the usage context changes, e.g., if a single-threaded context changes to a highly contended concurrent context. As a consequence, programmers can focus on the semantics of their systems and, e.g., conservatively use thread-safe components to ensure consistency of their data, while deferring implementation and optimization decisions to context-aware runtime optimizations. We demonstrate the effect on performance with self-adaptive concurrent queues, sets, and ordered sets. In all three cases, experimental evaluation shows close to optimal performance regardless of actual contention.

  • 29.
    Jusufi, Ilir
    et al.
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    Memedi, Mevludin
    Örebro University.
    Nyholm, Dag
    Uppsala University.
    TapVis: A Data Visualization Approach for Assessment of Alternating Tapping Performance in Patients with Parkinson's Disease2018Ingår i: EuroVis 2018 - Short Papers / [ed] / J. Johansson, F. Sadlo, and T. Schreck, Eurographics - European Association for Computer Graphics, 2018, s. 55-59Konferensbidrag (Refereegranskat)
    Abstract [en]

    Advancements in telemedicine have been helpful for frequent monitoring of patients with Parkinson's disease (PD) from remote locations and assessment of their individual symptoms and treatment-related complications. These data can be useful for helping clinicians to interpret symptom states and individually tailor the treatments by visualizing the physiological information collected by sensor-based systems. In this paper we present a visualization metaphor that represents symptom information of PD patients during tapping tests performed with a smartphone. The metaphor has been developed and evaluated with a clinician. It enabled the clinician to observe fine motor impairments and identify motor fluctuations regarding several movement aspects of patients that perform the tests from their homes.

  • 30.
    Bravo, Giangiacomo
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    The Human Sustainable Development Index2018Ingår i: Routledge Handbook ofSustainability Indicators / [ed] Simon Bell, Stephen Morse, Routledge, 2018, s. 284-293Kapitel i bok, del av antologi (Refereegranskat)
  • 31. Laitinen, Mikko
    et al.
    Lundberg, Jonas
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    Levin, Magnus
    Linnéuniversitetet, Fakulteten för konst och humaniora (FKH), Institutionen för språk (SPR).
    Martins, Rafael Messias
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    The Nordic Tweet Stream: A Dynamic Real-Time Monitor Corpus of Big and Rich Language Data2018Ingår i: DHN 2018 Digital Humanities in the Nordic Countries 3rd Conference: Proceedings of the Digital Humanities in the Nordic Countries 3rd Conference Helsinki, Finland, March 7-9, 2018 / [ed] Eetu Mäkelä, Mikko Tolonen, Jouni Tuominen, CEUR-WS.org , 2018, s. 349-362Konferensbidrag (Refereegranskat)
    Abstract [en]

    This article presents the Nordic Tweet Stream (NTS), a cross-disciplinarycorpus project of computer scientists and a group of sociolinguists interestedin language variability and in the global spread of English. Our research integratestwo types of empirical data: We not only rely on traditional structured corpusdata but also use unstructured data sources that are often big and rich inmetadata, such as Twitter streams. The NTS downloads tweets and associatedmetadata from Denmark, Finland, Iceland, Norway and Sweden. We first introducesome technical aspects in creating a dynamic real-time monitor corpus, andthe following case study illustrates how the corpus could be used as empiricalevidence in sociolinguistic studies focusing on the global spread of English tomultilingual settings. The results show that English is the most frequently usedlanguage, accounting for almost a third. These results can be used to assess howwidespread English use is in the Nordic region and offer a big data perspectivethat complement previous small-scale studies. The future objectives include annotatingthe material, making it available for the scholarly community, and expandingthe geographic scope of the data stream outside Nordic region.

  • 32.
    Bianchi, Federico
    et al.
    Univ Brescia, Italy.
    Francisco, Grimaldo
    Univ Valencia, Spain.
    Bravo, Giangiacomo
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Flaminio, Squazzoni
    Univ Brescia, Italy.
    The peer review game: an agent-based model of scientists facing resource constraints and institutional pressures2018Ingår i: Scientometrics, ISSN 0138-9130, E-ISSN 1588-2861, Vol. 116, nr 3, s. 1401-1420Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper looks at peer review as a cooperation dilemma through a game-theory framework. We built an agent-based model to estimate how much the quality of peer review is influenced by different resource allocation strategies followed by scientists dealing with multiple tasks, i.e., publishing and reviewing. We assumed that scientists were sensitive to acceptance or rejection of their manuscripts and the fairness of peer review to which they were exposed before reviewing. We also assumed that they could be realistic or excessively over-confident about the quality of their manuscripts when reviewing. Furthermore, we assumed they could be sensitive to competitive pressures provided by the institutional context in which they were embedded. Results showed that the bias and quality of publications greatly depend on reviewer motivations but also that context pressures can have a negative effect. However, while excessive competition can be detrimental to minimising publication bias, a certain level of competition is instrumental to ensure the high quality of publication especially when scientists accept reviewing for reciprocity motives.

  • 33.
    Tyrkkö, Jukka
    Linnéuniversitetet, Fakulteten för konst och humaniora (FKH), Institutionen för språk (SPR).
    Rautalin, Marjaana (Medarbetare/bidragsgivare)
    The Rise of the Idea of Model in Policymaking: The case of the British parliament, 1803-20052018Ingår i: European Journal of Sociology, ISSN 00039756, Vol. 59, nr 3, s. 341-363Artikel i tidskrift (Refereegranskat)
  • 34.
    Holgersson, Thomas
    et al.
    Linnéuniversitetet, Ekonomihögskolan (FEH), Institutionen för nationalekonomi och statistik (NS). Jönköping University.
    Kekezi, Orsa
    Jönköping University.
    Towards a multivariate innovation index2018Ingår i: Economics of Innovation and New Technology, ISSN 1043-8599, E-ISSN 1476-8364, nr 3, s. 254-272Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper argues that traditional measures of innovation as a univariate phenomenon may not be dynamic enough to adequately describe the complex nature of innovation. Consequently, the purpose is to develop a multidimensional index of innovation that is able to reflect innovation enablers and outputs. The index may then be used (i) to assess and quantify temporal changes of innovation, (ii) to describe regional differences and similarities of innovation, and (iii) serve as exogenous variables to analyze the importance of innovation for other economic phenomena. Our index is defined in a four-dimensional space of orthogonal axes. An empirical case study is used for demonstration of the index, where 44 variables are collected for all municipalities in Sweden. The index spanning the four-dimensional innovation comprises size, accessibility, firm performance, and agglomeration. The proposed index offers a new way of defining and analyzing innovation and should have a wide range of important applications in a world where innovation is receiving a great deal of recognition.

  • 35.
    Chatzimparmpas, Angelos
    et al.
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    Martins, Rafael Messias
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    Kerren, Andreas
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM).
    t-viSNE: A Visual Inspector for the Exploration of t-SNE2018Ingår i: Presented at IEEE Information Visualization  (VIS '18), Berlin, Germany, 21-26 October, 2018, 2018Konferensbidrag (Refereegranskat)
    Abstract [en]

    The use of t-Distributed Stochastic Neighborhood Embedding (t-SNE) for the visualization of multidimensional data has proven to be a popular approach, with applications published in a wide range of domains. Despite their usefulness, t-SNE plots can sometimes be hard to interpret or even misleading, which hurts the trustworthiness of the results. By opening the black box of the algorithm and showing insights into its behavior through visualization, we may learn how to use it in a more effective way. In this work, we present t-viSNE, a visual inspection tool that enables users to explore anomalies and assess the quality of t-SNE results by bringing forward aspects of the algorithm that would normally be lost after the dimensionality reduction process is finished.

  • 36.
    Stevenson-Ågren, Jean
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO). University of Sheffield, UK.
    Israelsson, Johan
    Kalmar County Hospital.
    Nilsson, Gunilla
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för hälso- och vårdvetenskap (HV).
    Petersson, Göran
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO).
    Bath, Peter A.
    University of Sheffield, UK.
    Vital sign documentation in electronic records: the development of workarounds2018Ingår i: Health Informatics Journal, ISSN 1460-4582, E-ISSN 1741-2811, Vol. 24, nr 2, s. 206-215Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Workarounds are commonplace in health care settings. An increase in the use of electronic health records (EHR) has led to an escalation of workarounds as health care professionals cope with systems which are inadequate for their needs. Closely related to this, the documentation of vital signs in EHR has been problematic. The accuracy and completeness of vital sign documentation has a direct impact on the recognition of deterioration in a patient’s condition. We examined work flow processes to identify workarounds related to vital signs in a 372-bed hospital in Sweden. In three clinical areas a qualitative study was performed with data collected during observations and interviews and analysed through thematic content analysis. We identified paper workarounds in the form of hand-written notes and a total of eight pre-printed paper observation charts. Our results suggested that nurses created workarounds to allow a smooth workflow and to ensure patients safety.

  • 37.
    Ericson, Lisa
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO).
    Hovstadius, Bo
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO).
    Carlsson, Martin
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO). Kalmar County Hospital.
    Petersson, Göran
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO).
    Wanby, Pär
    Kalmar County Hospital.
    A cost analysis of systematic vitamin D supplementation in the elderly versus supplementation based on assessed requirements2017Ingår i: Journal of Aging Research and Healthcare, ISSN 2474-7785, Vol. 2, nr 2, s. 13-22Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Hypovitaminosis D is common among older people and treatment with vitamin D is associated with reduced risk of falls and fractures. This paper provides a cost analysis of assessing the vitamin D status of and providing the pharmaceuticals for elderly citizens in Kalmar County, Sweden (population approximately 230,000). Four hypothetical interventions were analyzed: (a) systematic vitamin D/calcium supplementation to all elderly (≥75 years), (b) assessment of vitamin D status in elderly and supplementation to those with insufficient levels, (c) systematic vitamin D/calcium supplementation to all nursing-home residents, and (d) assessment of vitamin D status in nursing-home residents and supplementation to those with insufficient levels. The calculations were based on an estimated reduction in overall costs due to the assessed number of hip fractures after vitamin D/calcium supplementation. The annual net economic benefit of vitamin D/calcium supplementation was estimated at (a) €304,000, (b) €860,000, (c) €755,000, and (d) €740,000. The provision of systematic vitamin D supplementation to nursing-home residents would provide a substantial net economic benefit to society and assessment of the vitamin D status before starting supplementation does not seem to be necessary. Although assessment of all elderly citizens would be more comprehensive, the true proportion with insufficient vitamin D levels in the general population is uncertain and to reaching consensus on the most advantageous daily vitamin D intake, vitamin D blood levels are necessary. Also, systematic supplementation to all elderly would result in other outcomes that could be worth the cost, but that remains to be evaluated.

  • 38.
    Bravo, Giangiacomo
    et al.
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Laitinen, Mikko
    Linnéuniversitetet, Fakulteten för konst och humaniora (FKH), Institutionen för språk (SPR).
    Levin, Magnus
    Linnéuniversitetet, Fakulteten för konst och humaniora (FKH), Institutionen för språk (SPR).
    Löwe, Welf
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM), Institutionen för datavetenskap (DV).
    Petersson, Göran
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO).
    Big Data in Cross-Disciplinary Research: J.UCS Focused Topic2017Ingår i: Journal of universal computer science (Online), ISSN 0948-695X, E-ISSN 0948-6968, Vol. 23, nr 11, s. 1035-1037Artikel i tidskrift (Övrigt vetenskapligt)
  • 39.
    Memeti, Suejb
    et al.
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap (DV).
    Pllana, Sabri
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap (DV).
    Combinatorial optimization of DNA sequence analysis on heterogeneous systems2017Ingår i: Concurrency and Computation, ISSN 1532-0626, E-ISSN 1532-0634, Vol. 29, nr 7, artikel-id e4037Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Analysis of DNA sequences is a data and computational intensive problem, and therefore, it requires suitable parallel computing resources and algorithms. In this paper, we describe our parallel algorithm for DNA sequence analysis that determines how many times a pattern appears in the DNA sequence. The algorithm is engineered for heterogeneous platforms that comprise a host with multi-core processors and one or more many-core devices. For combinatorial optimization, we use the simulated annealing algorithm. The optimization goal is to determine the number of threads, thread affinities, and DNA sequence fractions for host and device, such that the overall execution time of DNA sequence analysis is minimized. We evaluate our approach experimentally using real-world DNA sequences of various organisms on a heterogeneous platform that comprises two Intel Xeon E5 processors and an Intel Xeon Phi 7120P co-processing device. By running only about 5% of possible experiments, our optimization method finds a near-optimal system configuration for DNA sequence analysis that yields with average speedup of 1.6 ×  and 2 ×  compared with the host-only and device-only execution.

  • 40.
    Dai, Deliang
    et al.
    Linnéuniversitetet, Ekonomihögskolan (FEH), Institutionen för nationalekonomi och statistik (NS).
    Holgersson, Thomas
    Linnéuniversitetet, Ekonomihögskolan (FEH), Institutionen för nationalekonomi och statistik (NS).
    Karlsson, Peter S.
    Linnéuniversitetet, Ekonomihögskolan (FEH), Institutionen för nationalekonomi och statistik (NS).
    Expected and unexpected values of Individual Mahalanobis Distances2017Ingår i: Communications in Statistics - Theory and Methods, ISSN 0361-0926, E-ISSN 1532-415X, Vol. 46, nr 18, s. 8999-9006Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper derives first-order sampling moments of individual Mahalanobis distances (MD) in cases when the dimension p of the variable is proportional to the sample size n. Asymptotic expected values when n, p → ∞ are derived under the assumption p/n → c, 0 ⩽ c < 1. It is shown that some types of standard estimators remain unbiased in this case, while others are asymptotically biased, a property that appears to be unnoticed in the literature. Second order moments are also supplied to give some additional insight to the matter.

  • 41.
    Rosenlund, Joacim
    et al.
    Linnéuniversitetet, Ekonomihögskolan (FEH), Institutionen för organisation och entreprenörskap (OE).
    Notini, Peter
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Bravo, Giangiacomo
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Exploring attitudes to societal relevance: the effects of reflection on research practices among Swedish environmental scientists2017Ingår i: Journal of Responsible Innovation, ISSN 2329-9460, E-ISSN 2329-9037, Vol. 4, nr 3, s. 337-353Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Funding agencies and policy-makers have put increasing pressure on scientists to better clarify the usefulness of their research. It has been suggested that this may have led to an increased reflection on the societal relevance of research among the scientists themselves. However, this often is more an assumption than a carefully verified fact. This paper investigates whether reflection on societal relevance actually occurs and has a measurable effect on the choice of research and on dissemination activities performed by scientists. A survey was conducted among researchers in environmental science and technology at Swedish universities. Results show that researchers do frequently reflect upon the societal and environmental relevance of their work. We used path modelling techniques to assess how this influences their professional activities. Results show that reflection was important to explain both the choice of research and dissemination activities. Variables such as individual attitudes, experience and collaboration with external actors also affected these outcomes.

  • 42.
    Natalini, Davide
    et al.
    Anglia Ruskin University, UK.
    Bravo, Giangiacomo
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Jones, Aled Wynne
    Anglia Ruskin University, UK.
    Global food security and food riots: an agent-based modelling approach2017Ingår i: Food Security, ISSN 1876-4517, E-ISSN 1876-4525Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Due to negative consequences of climate change for agriculture and food production shocks affecting different areas of the world, the past two decades saw the conditions of global food security increasingly worsen. This has resulted in negative consequences for the world economy, partly causing international food price spikes and social upheavals. In this paper we present statistical findings along with a preliminary version of an original agent-based model called the Dawe Global Security Model that simulates the global food market and the political fragility of countries. The model simulates the effects of food insecurity on international food prices and how these, coupled with national political fragility and international food trade can, in turn, increase the probability of food riots in countries. The agents in the model are the 213 countries of the world whose characteristics reflect empirical data and the international trade of food is also simulated based on real trade partnerships and data. The model has been informed, calibrated and validated using real data and the results of these procedures are presented in the paper. To further test the model we also present the model’s forecasts for the near future in terms of food prices and incidence of food riots. The Dawe Global Security Model can be used to test scenarios on the evolution of shocks to global food production and analyse consequences for food riots. Further developments of the model can include national responses to food crises to investigate how countries can influence the spread of global food crises.

  • 43.
    Gargano, Francesco
    et al.
    University of Palermo, Italy.
    Tamburino, Lucia
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för matematik (MA).
    Bagarello, Fabio
    University of Palermo, Italy ; INFN National Institute for Nuclear Physics, Italy.
    Bravo, Giangiacomo
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Large-scale effects of migration and conflict in pre-agricultural groups: Insights from a dynamic model2017Ingår i: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 12, nr 3, artikel-id e0172262Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The debate on the causes of conflict in human societies has deep roots. In particular, the extent of conflict in hunter-gatherer groups remains unclear. Some authors suggest that large-scale violence only arose with the spreading of agriculture and the building of complex societies. To shed light on this issue, we developed a model based on operatorial techniques simulating population-resource dynamics within a two-dimensional lattice, with humans and natural resources interacting in each cell of the lattice. The model outcomes under different conditions were compared with recently available demographic data for prehistoric South America. Only under conditions that include migration among cells and conflict was the model able to consistently reproduce the empirical data at a continental scale. We argue that the interplay between resource competition, migration, and conflict drove the population dynamics of South America after the colonization phase and before the introduction of agriculture. The relation between population and resources indeed emerged as a key factor leading to migration and conflict once the carrying capacity of the environment has been reached.

  • 44.
    Bravo, Giangiacomo
    et al.
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Farjam, Mike
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Prospects and Challenges for the Computational Social Sciences2017Ingår i: Journal of universal computer science (Online), ISSN 0948-695X, E-ISSN 0948-6968, Vol. 23, nr 11, s. 1057-1069Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Computational social sciences (CSS) refer to computer-enabled investigations of human behaviour and social interaction. They include three main components - (i) computational modelling and social simulation, (ii) the analysis of digital traces of online interactions, (iii) virtual labs and online experiments - and allow researchers to perform studies that were even hard to imagine a few decades ago. Moreover, CSS favour a more systematic test of theories and increase the possibility of study replication, two factors holding the potential to help social sciences reach a higher scientific status. Despite the huge potential of CSS, we follow previous works in identifying several impediments to a larger adoption of computational methods in social sciences. Most of them are linked with the humanistic attitude and a lack of technical skills of many social scientist. Significant changes in the basic training of social scientist and in the relation patterns with other disciplines and departments are needed before the potential of CSS can be fully exploited.

  • 45.
    Laitinen, Mikko
    et al.
    University of Eastern Finland, Finland.
    Lundberg, Jonas
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap (DV).
    Levin, Magnus
    Linnéuniversitetet, Fakulteten för konst och humaniora (FKH), Institutionen för språk (SPR).
    Lakaw, Alexander
    University of Eastern Finland, Finland.
    Revisiting weak ties: Using present-day social media data in variationist studies2017Ingår i: Exploring Future Paths for Historical Sociolinguistics / [ed] Tanja Säily, Minna Palander-Collin, Arja Nurmi, Anita Auer, Amsterdam: John Benjamins Publishing Company, 2017, s. 303-325Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    This article makes use of big and rich present-day data to revisit the social network model in sociolinguistics. This model predicts that mobile individuals with ties outside a home community and subsequent loose-knit networks tend to promote the diffusion of linguistic innovations. The model has been applied to a range of small ethnographic networks. We use a database of nearly 200,000 informants who send micro-blog messages in Twitter. We operationalize networks using two ratio variables; one of them is a truly weak tie and the other one a slightly stronger one. The results show that there is a straightforward increase of innovative behavior in the truly weak tie network, but the data indicate that innovations also spread under conditions of stronger networks, given that the network size is large enough. On the methodological level, our approach opens up new horizons in using big and often freely available data in sociolinguistics, both past and present.

  • 46.
    Severson, Pernilla
    Linnéuniversitetet, Fakulteten för konst och humaniora (FKH), Institutionen för medier och journalistik (MJ).
    Searching for voice as democratic values in contemporary Swedish web archive initiatives2017Ingår i: Digital Democracy: Book of Abstracts / [ed] ECREA Sections: Communication and Democracy; and Media Industries and Cultural Production, Flemmingsberg, 2017Konferensbidrag (Refereegranskat)
    Abstract [en]

    This paper presents initial results from a study of various contemporary web archive initiatives in Sweden. Archives are subjective rather than objective, as well as methods for archiving and tracking and searching and documenting for digital material research (MacNeil & Eastwood,2017). The purpose of the study is to analyse and distinguish what voices are made present in the web archive initiatives, how digitization matter in this voice-making and how this can be understood in relation to democratic values.

    The method is a qualitative content analysis of the web archive initiatives online presence (the archive web site), including both self-decriptions and the site’s affordances. Empirically the material for the analysis consist of the following Swedish national archive initiatives:

    1. Kungliga Biblioteket, Sweden’s national library, a national initiative to preserve the cultural heritage of the aftermath;

    2. Rättviseförmedlingen, NGO, uses inquiries and dissemination of lists using social media to broaden the selection of competencies;

    3. The Center for Business History, a non-profit association with companies as primary members, works to preserve and tell business history;

    4. Platsr, Riksantikvarieämbetets site for stories and memories where anyone can contribute;

    5. Kringla, collects heritage archives.

    These archive initiatives have different aims, different initiators with different interaction and contributing actors, and use different (and more or less visible) archiving methods.

    The analysis focuses on voice in the archive, based on Carpentier’s analysis model (2011) forparticipant-oriented processes. Analysis show variations of values linked to voice where technologydirects attention and power to certain “voices” (themes, categories etc). These variations, this diversity,is discussed in relation to resistance and the perspective of how the archive is part of larger public (public voice). The paper concludes with a discussion of these various public voice’s implicationsin relation to democratic values as universal service, participation and agency.

  • 47.
    Ghorbani, Amineh
    et al.
    Delft University of Technology, The Netherlands.
    Bravo, Giangiacomo
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    Frey, Ulrich
    German Aerospace Center (DLR), Germany.
    Theesfeld, Insa
    Martin Luther University Halle-Wittenberg, Germany.
    Self-organization in the commons: An empirically-tested model2017Ingår i: Environmental Modelling & Software, ISSN 1364-8152, E-ISSN 1873-6726, Vol. 96, s. 30-45Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A appropriate bottom-up rule system can support the sustainability of common-pool resources such as forests and fisheries. The process that leads to the developments of such institutional settings requires the considerations of multiple social, physical, and institutional factors over long time horizons. In this paper, we present the SONICOM model as a general exploratory model of CPR systems. The model can be configured to represent different CPR systems in order to explore what kind of institutional settings result in stable systems, i.e. situations where the resource and the appropriators are in a state of well-being. We use a large-N-dataset of CPR management institutions to validate the model. The results show numerous correlations between various parameters of the system such as rule compliance, social influence and resource growth rate which help explaining the process of institutional emergence as well as unveiling the conditions under which systems are stable.

  • 48.
    Ericson, Lisa
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO).
    Hammar, Tora
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO).
    Schönström, Nils
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO).
    Petersson, Göran
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för medicin och optometri (MEO).
    Stakeholder consensus on the purpose of clinical evaluation of electronic health records is required2017Ingår i: Health Policy and Technology, ISSN 2211-8837, E-ISSN 2211-8845, Vol. 6, nr 2, s. 152-160Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Objective

    To explore the purpose and performance of clinical evaluation of electronic health records (EHRs) among stakeholders in order to identify any need for regulatory actions or guidelines.

    Methods

    This was a qualitative study of information collected in semi-structured interviews (n=28) of representatives of the five largest EHR vendors in Sweden, healthcare provider IT managers, users, and representatives of national authorities.

    Results

    We found a difference between the stated purpose of clinical evaluation of EHRs by the authorities and the perception of the purpose by the vendors, IT managers, and the users. The respondents gave divergent answers about the medical purpose of the application: e.g. availability of data, overview and documentation, patient safety, process efficiency, decision support, a working tool, and an aid to communication and follow-up. Several vendors found it difficult to put the term clinical evaluation in its specific context, instead referring to literature reviews, risk analyses, risk-management processes, acceptance tests, test facilities, pilot tests, and proven experience.

    Conclusions

    Stakeholders need to agree on a mutually acceptable, consistent method to guide regulatory decisions. The lack of consensus regarding the purpose and performance of clinical evaluation of EHRs could impact negatively on a safe and efficient documentation in healthcare. Thus, there is a need for more consistent use of terms and concepts in, and a more systematic approach to, clinical evaluation of EHRs. To ensure that the implementation of IT in healthcare meets expectations, delivers the desired outcome, and does not create new problems, it should be evaluated.

  • 49.
    Martins, Rafael Messias
    et al.
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM), Institutionen för datavetenskap (DV).
    Simaki, Vasiliki
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM), Institutionen för datavetenskap (DV). Lund University.
    Kucher, Kostiantyn
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM), Institutionen för datavetenskap (DV).
    Paradis, Carita
    Lund University.
    Kerren, Andreas
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för datavetenskap och medieteknik (DM), Institutionen för datavetenskap (DV).
    StanceXplore: Visualization for the Interactive Exploration of Stance in Social Media2017Konferensbidrag (Refereegranskat)
    Abstract [en]

    The use of interactive visualization techniques in Digital Humanities research can be a useful addition when traditional automated machine learning techniques face difficulties, as is often the case with the exploration of large volumes of dynamic—and in many cases, noisy and conflicting—textual data from social media. Recently, the field of stance analysis has been moving from a predominantly binary approach—either pro or con—to a multifaceted one, where each unit of text may be classified as one (or more) of multiple possible stance categories. This change adds more layers of complexity to an already hard problem, but also opens up new opportunities for obtaining richer and more relevant results from the analysis of stancetaking in social media. In this paper we propose StanceXplore, a new visualization for the interactive exploration of stance in social media. Our goal is to offer DH researchers the chance to explore stance-classified text corpora from different perspectives at the same time, using coordinated multiple views including user-defined topics, content similarity and dissimilarity, and geographical and temporal distribution. As a case study, we explore the activity of Twitter users in Sweden, analyzing their behavior in terms of topics discussed and the stances taken. Each textual unit (tweet) is labeled with one of eleven stance categories from a cognitive-functional stance framework based on recent work. We illustrate how StanceXplore can be used effectively to investigate multidimensional patterns and trends in stance-taking related to cultural events, their geographical distribution, and the confidence of the stance classifier. 

  • 50.
    Laitinen, Mikko
    Linnéuniversitetet, Fakulteten för konst och humaniora (FKH), Institutionen för språk (SPR).
    What happens to ongoing change in multilingual settings?: A corpus compiler’s perspective on new data and new research prospects2017Ingår i: Challenging the Myth of Monolingual Corpora / [ed] Arja Nurmi, Päivi Pahta, Tanja Rütten, Leiden: Brill Academic Publishers, 2017, s. 58-79Kapitel i bok, del av antologi (Refereegranskat)
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