005 Computerprogrammierung, Programme, Daten
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Application developers constitute an important part of a digital platform’s ecosystem. Knowledge about psychological processes that drive developer behavior in platform ecosystems is scarce. We build on the lead userness construct which comprises two dimensions, trend leadership and high expected benefits from a solution, to explain how developers’ innovative work behavior (IWB) is stimulated. We employ an efficiencyoriented and a social-political perspective to investigate the relationship between lead userness and IWB. The efficiency-oriented view resonates well with the expected benefit dimension of lead userness, while the social-political view might be interpreted as a reflection of trend leadership. Using structural equation modeling, we test our model with a sample of over 400 developers from three platform ecosystems. We find that lead userness is indirectly associated with IWB and the performance-enhancing view to be the stronger predictor of IWB. Finally, we unravel differences between paid and unpaid app developers in platform ecosystems.
PosturePairsDB19
(2019)
Database of posture pairs recording the change before and after posture training.
Lower back pain is one of the most prevalent diseases in Western societies. A large percentage of European and American populations suffer from back pain at some point in their lives. One successful approach to address lower back pain is postural training, which can be supported by wearable devices, providing real-time feedback about the user’s posture. In this work, we analyze the changes in posture induced by postural training. To this end, we compare snapshots before and after training, as measured by the Gokhale SpineTracker™. Considering pairs of before and after snapshots in different positions (standing, sitting, and bending), we introduce a feature space, that allows for unsupervised clustering. We show that resulting clusters represent certain groups of postural changes, which are meaningful to professional posture trainers.
Vernetzte und miteinander kommunizierende IT-Systeme bieten grundsätzlich Angriffsmöglichkeiten auf ihre vorgesehenen Funktionen. Das ist bei miteinander kooperierenden IT-Systemen zum vernetzten Straßenverkehr nicht anders. In diesem Beitrag wird dargelegt, auf welcher technologischen Grundlage sich ein vernetzter Straßenverkehr etablieren könnte und welche Herausforderungen für die IT-Sicherheit dadurch entstehen.
Vernetzte und miteinander kommunizierende Fahrzeuge bieten grundsätzlich Angriffsmöglichkeiten auf ihre vorgesehenen Funktionen. In diesem Beitrag werden zunächst basierend auf dem „Reference Architectural Model Automotive“ Schutzobjekte aus IT-Sicherheitssicht in Fahrzeugen aufgezeigt. Anschließend wird dargelegt, welche Strukturierungsmöglichkeiten in der IT-Sicherheit bekannt sind, um Sicherheitsanforderungen für diese Schutzobjekte zu definieren und deren Einhaltung und Umsetzung nachzuweisen. Zum Ende zeigt dieser Beitrags auf, wie die bestehende Typprüfung bzw. Hauptuntersuchung erweitert werden könnten, um in diesem Rahmen spezifische IT-Sicherheitsnachweise zu führen.
Herein we report an update to ACPYPE, a Python3 tool that now properly converts AMBER to GROMACS topologies for force fields that utilize nondefault and nonuniform 1–4 electrostatic and nonbonded scaling factors or negative dihedral force constants. Prior to this work, ACPYPE only converted AMBER topologies that used uniform, default 1–4 scaling factors and positive dihedral force constants. We demonstrate that the updated ACPYPE accurately transfers the GLYCAM06 force field from AMBER to GROMACS topology files, which employs non-uniform 1–4 scaling factors as well as negative dihedral force constants. Validation was performed using β-d-GlcNAc through gas-phase analysis of dihedral energy curves and probability density functions. The updated ACPYPE retains all of its original functionality, but now allows the simulation of complex glycomolecular systems in GROMACS using AMBER-originated force fields. ACPYPE is available for download at https://github.com/alanwilter/acpype.
Designing consumption feedback to support sustainable behavior is an active research topic. In recent years, relevant work has suggested a variety of possible design strategies. Addressing the more recent developments in this field, this paper presents a structured literature review, providing an overview of current information design approaches and highlighting open research questions. We suggest a literature-based taxonomy of used strategies, data source and output media with a special focus on design. In particular, we analyze which visual forms are used in current research to reach the identified strategy goals. Our survey reveals that the trend is towards more complex and contextualized feedback and almost every design within sustainable HCI adopts common visualization forms. Furthermore, adopting more advanced visual forms and techniques from information visualization research is helpful when dealing with ever-increasing data sources at home. Yet so far, this combination has often been neglected in feedback design.
Datenmodellierung
(2019)
Andreas Gadatsch schließt mit dem vorliegenden essential eine Lücke in einführenden Werken zur Datenmodellierung. Diese Modelle gehören zum Basiswissen in Einführungsveranstaltungen zur Wirtschaftsinformatik für Betriebswirte. Die Literatur dazu ist für diese Zielgruppe häufig zu speziell, da sie sich eher an Informatiker richtet. Der Autor bietet hier nun einen kompakten Einstieg in die klassische CHEN-Notation anhand eines durchgängigen Fallbeispiels, auf der viele neue Modellierungsansätze aufbauen. Die zweite Auflage enthält einige formale Korrekturen und Ergänzungen (z. B. Rekursive Relationen).
The documentation requirements of data published in long term archives have significantly grown over the last decade. At WDCC the data publishing process is assisted by “Atarrabi”, a web-based workflow system for reviewing and editing metadata information by the data authors and the publication agent. The system ensures high metadata quality for long-term use of the data with persistent identifiers (DOI/URN). By these well-defined references (DOI) credit can properly be given to the data producers in any publication.
Publikation von Umweltdaten
(2010)
In this paper, we present a solution how to test cultural influences on E-Learning in a global context. Based on a metadata approach, we show how specifically cultural influence factors can be determined to transfer and adapt learning environments. We present a method how those influence factors can be validated for both, to improve the dynamical meta-data specification and to be used in the development of (international) E-Learning scenarios.
This paper addresses the urgent need for international standardization of Context Metadata for e-Learning environments. In particular, E-Learning when distributed over the Internet, can synchronously and asynchronously reach a huge number of learners but also has to deal with a variety of different cultures and societies and the related complications. A lot of the differences strongly demand adaptation processes in which especially the contents are being modified to fit the needs in the targeted contexts. In our approach solving this task, we determined a list of around 160 significant possible differences and defined those as context metadata. In this paper, we show the results of our research regarding to the determination of context related influence factors as well as approaches to deal with them and present a first specification of the representing context-metadata.
Mobile devices as the iPhone and Android-based smartphones can be turned into useful tools for researchers in the field. The concept of a scholarly or scientific workbench can be extended by a mobile usage scenario, where the researcher takes photographs, records sounds, and performs basic metadata editing. We present the prototype and the architecture of a mobile workbench that uploads geo-tagged photographs taken by the camera of the smartphone into a digital repository. We discuss the idea of a research workbench as an integrated but loosely-coupled set of services; we show where in our solution the functionalities of a research workbench are contained or where other services can be added. Finally, we focus on the software running on the mobile phone, which is in itself a set of loosely-coupled applications.
