Now showing 1 - 10 of 250
  • Publication
    Assistenztechnologien für die Fertigung
    Optimierte Arbeitsprozesse können die Effizienz einer Werft deutlich steigern und damit zu einem Wettbewerbsvorteil verhelfen. Das Erforschen von verbesserungspotenzialen sowie die Entwicklung von Systemen, welche zur Effizienzsteigerung beitragen, stehen im Fokus der Aufgaben des Rostocker Fraunhofer-lnstituts für Graphische Datenverarbeitung IGD.
  • Publication
    Supporting the learning dimension of knowledge work
    ( 2009)
    Lindstaedt, Stefanie
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    Hoog, Robert de
    We argue that in order to increase knowledge work productivity we have to put more emphasis on supporting this learning dimension of knowledge work. The key distinctions compared to other TEL approaches are (1) taking the tight integration of working and learning seriously, (2) enabling seamless transitions on the continuum of learning practices, and (3) tapping into the resources (material as well as human) of the organization. Within this contribution we develop the concept of work-integrated learning (WIL) and show how it can be implemented. The APOSDLE environment serves as a reference architecture which proves how a variety of tightly integrated support services implement the three key distinctions discussed above.
  • Publication
    Measuring average rheological quantities of cell monolayers in the linear viscoelastic regime
    ( 2016)
    Amtmann, Anette
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    Buchholz, Rainer
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    Dakhil, Haider
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    Gilbert, Daniel F.
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    Hübner, Holger
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    Limmer, Anja
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    Malhotra, Deepika
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    Wierschem, Andreas
    During the last decades, the rheology of cells has been studied almost entirely in single cells. While cell-to-cell variation is typically very large and most studies were carried out in the nonlinear viscoelastic regime, we quantify average linear viscoelastic cell properties like storage and loss moduli and normal stress in monolayers of different cell types showing that murine 3T6 fibroblasts, human fibroblasts, and HeLa cells differ considerably in their storage modulus. To this end, we modified a commercial rheometer to set up a parallel-disk configuration at gap widths of a few micrometers and optically detected the cell concentration in the gap. This enables studying the linear viscoelastic behavior of the cells and permits quantifying the impact of drugs affecting the cytoskeleton or the extracellular matrix connection. Thus, due to its high-content approach, without the need of treating the samples in the rheometer, this envisions the use of this method as a fast diagnostic tool. The method also allows for quantitatively studying of the impact of pre-stress on the storage and loss moduli of the cells.
  • Publication
    Perspectives on social robots. From the historic background to an experts' view on future developments
    ( 2018)
    Korn, Oliver
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    Fron, Christian
    Social robots are robots interacting with humans not only in collaborative settings, but also in personal settings like domestic services and healthcare. Some social robots simulate feelings (companions) while others just help lifting (assistants). However, they often incite both fascination and fear: what abilities should social robots have and what should remain exclusive to humans? We provide a historical background on the development of robots and related machines (1), discuss examples of social robots (2) and present an expert study on their desired future abilities and applications (3) conducted within the Forum of the European Active and Assisted Living Programme (AAL). The findings indicate that most technologies required for the social robots' emotion sensing are considered ready. For care robots, the experts approve health-related tasks like drawing blood while they prefer humans to do nursing tasks like washing. On a larger societal scale, the acceptance of social robots increases highly significantly with familiarity, making health robots and even military drones more acceptable than sex robots or child companion robots for childless couples. Accordingly, the acceptance of social robots seems to decrease with the level of face-to-face emotions involved.
  • Publication
    Generic personal assistance architecture for mobile environments
    The usage of mobile computers such as PDAs and mobile phones provides new services for the user. In the early days, user input or external environment information was used for defining context information for personal assistance. Some applications e.g. Location Based Services (LBS) are very handy and powerful and they enable the next generation of assistance by using user related parameters, behavior and preferences. By using new interfaces and sensors, an additional and comprehensive understanding of the user's situation can be determined. This paper shows an improving approach of the generic architecture for mobile personal situation aware assistance and gives an outlook on upcoming challenges of research in activity and assistance models.
  • Publication
    MEMO - situated learning services for e-Mobility
    ( 2012) ;
    Freitag, Katharina
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    Häfner, Tobias
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    Heinitz, Antje
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    Schäfer, Markus
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    Schlemminger, Andreas
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    Schmidt, Mareike
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    Schwertel, Uta
    The expected large-scale introduction of electric vehicles creates a need for up-to-date and just-in-time available learning materials and tools. In this paper we demonstrate how a set of web-based and mobile learning and collaboration services support situated learning for e-Mobility and similar domains. The approach is currently developed within the MEMO project.
  • Publication
    Enhancing Vibroarthrography by using Sensor Fusion
    ( 2020)
    Kraft, Dimitri
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    Bader, Rainer
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    Natural and artificial joints of a human body are emitting vibration and sound during the movement. The sound and vibration pattern of a joint is characteristic and changes due to damage, uneven tread wear, injuries, or other influences. Hence, the vibration and sound analysis enables an estimation of the joint condition. This kind of analysis, vibroarthrography (VAG), allows the analysis of diseases like arthritis or osteoporosis and might determine trauma, inflammation, or misalignment. The classification of the vibration and sound data is very challenging and needs a comprehensive annotated data base. Current existing data bases are very limited and insufficient for deep learning or artificial intelligent approaches. In this paper, we describe a new concept of the design of a vibroarthrography system using a sensor network. We discuss the possible improvements and we give an outlook for the future work and application fields of VAG.
  • Publication
    Situation aware interaction with multi-modal business applications in smart environments
    ( 2013) ;
    Bader, Sebastian
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    Ruscher, Gernot
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    Krüger, Frank
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    Kirste, Thomas
    A consistent user experience in combination with proactive assistance may improve the user performance while interacting with heterogeneous data sources as e.g., occurring in business decision making. We describe our approach which is based on inferring the user intentions from sensory inputs, providing a situation aware information assistance, and controlling the environment proactively by anticipating future goals. Our system has been realized within a smart meeting room and has in parts been evaluated. In this paper, we describe the core ideas underlying our approach and report on first findings from the evaluation.
  • Publication
    Barcode-based Navigation Concept for Autonomous Wheelchairs and Walking Frames
    ( 2021) ;
    Antony, Niklas
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    Hölle, Bernd
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    Blenke, Dennis
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    Herrmann, Peter
    After a knee or hip surgery, a fast mobilization of the patient is highly recommended. The best therapy would be individual physiotherapy or guided walks with personal assistance, but unfortunately, this is very quite expensive and clinics are suffering from a lack of well-educated personnel. With RoRo, an autonomous walking frame (rollator), the patient receives walking support, reminders for exercises, and a measurement of the gait and walking parameters. For the navigation purposes of the autonomous rollator within the building of a clinic, a precise indoor navigation concept is needed that even works without a continuous internet connection. This paper describes the location and navigation concept with optical barcodes that are stuck at the top of each floor. The information of the barcodes is coded in the way, that they contain orientation features and are spanning a hierarchical structure.
  • Publication
    An innovative telemedical support system to measure physical activity in children and adolescents with type 1 diabetes mellitus
    ( 2011)
    Schiel, Ralf
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    Thomas, Andreas
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    Kaps, Alexander
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    To assess physical activity in patients with type 1 diabetes an innovative telemedical support system has been developed. The aim of the feasibility trial was to prove its use in a clinical setting. Patients/methods: 16 children/adolescents with type 1 diabetes mellitus aged 14.5±2.2 years (diabetes duration 6.5±3.6 years, HbA1c 8.8±1.0%) were included in the study. During a period of 1-3 days all the patients received a telemedical assessment system. It consists of a sensor for physical activity integrated into a mobile phone (DiaTrace). Additionally it is combined with a system for continuous blood glucose monitoring (CGM). Results: The technical system was highly accepted by all the 16 children and adolescents. Physical activity measured was 13.3±5.5 AU/d, mean duration of total physical activity was 204.9±66.5 min/d (walking 102.5±62.5, running 7.4±5.8, cycling 39.2±32.7, driving 36.0±18.6, non-specific physical activity 57.0±29.7 min/d). Periods without activity lasted for 386.5±187.2 min/d. Daily energy expenditure was 1 964.1±185.5 kcal/d. Correlations between physical activity (measured with DiaTrace) and blood glucose profiles (measured with CGM) were calculated. Pearson's correlation coefficients ranged between 0.59 and 0.99 (median 0.91). Hence, these good correlation coefficients show the high and direct association between blood glucose values and activity units. The wide ranges in correlation coefficients demonstrate a huge variability of individualized reactions. Conclusions: Use of innovative electronic health technology is highly accepted by patients. It reveals an accurate, real-time assessment of an individual's physical activity. These Information can use for insulin dose-adjustment.