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The Internet of Things (IoT) relies on sensor devices to measure real-world phenomena in order to provide IoT services. The sensor readings are shared with multiple entities, such as IoT services, other IoT devices or other third parties. The collected data may be sensitive and include personal information. To protect the privacy of the users, the data needs to be protected through an encryption algorithm. For sharing cryptographic cipher-texts with a group of users Attribute-Based Encryption (ABE) is well suited, as it does not require to create group keys. However, the creation of ABE cipher-texts is slow when executed on resource constraint devices, such as IoT sensors. In this paper, we present a modification of an ABE scheme, which not only allows to encrypt data efficiently using ABE, but also reduces the size of the cipher-text, that must be transmitted by the sensor. We also show how our modification can be used to realise an instantaneous key revocation mechanism.
Einleitung: Aktuelle Erkenntnisse der Faszienforschung zeigen, dass Faszien weitaus mehr Einfluss auf den menschlichen Bewegungsapparat haben, als bisher angenommen. Besonders die Fascia Thoracolumbalis (FTL) stellt eine große Faszie dar, deren patholo-gische Veränderungen zu Beschwerden im Bereich des unteren Rückens führen können. Auf der Grundlage dieser Erkenntnisse wurde die Behandlungsmethode mit der Foam Roll entwickelt, um Muskeln und Faszien gezielt zu behandeln und Beschwerden vorzubeugen. Beobachtungen zeigen, dass das Foam Rolling die Dehnfähigkeit der Muskulatur verbes-sert. Jedoch wurde bisher nicht untersucht, wie sich Übungen mit der Foam Roll auf die Beweglichkeit der Faszien auswirken. Ziel dieser Studie ist es daher, aufzuzeigen, ob das Foam Rolling Einfluss auf die Beweglichkeit der FTL hat. Zu diesem Zweck wurden sowohl die kurzfristigen, als auch die langfristigen Auswirkungen untersucht.
Methode: Es nahmen 38 Probanden an der Studie teil. Diese wurden in eine Foam Roll Gruppe, eine Placebo- und eine Kontrollgruppe eingeteilt. Das Bewegungsausmaß einer Rumpfflexion von 30° wurde mit Videos eines Ultraschallgerätes, als Grundlage der Unter-suchungen über die Beweglichkeit der FTL, aufgezeichnet. Anschließend erfolgte die Ana-lyse mit der Cross Correlation Software nach Dr. Andrew Dilley. Hierdurch konnte das Bewegungsausmaß der Faszie ermittelt werden. Neben der Faszienbeweglichkeit wurden Messungen bezüglich der lumbalen, sowie thoracolumbalen Flexion und der Mechanosen-sivität einzelner Muskeln durchgeführt. Zur Ermittlung der Werte gab es eine Messung vorab und zehn Minuten nach der Intervention. Die Messwerte wurden sowohl in einen Vorher-Nachher-Vergleich gestellt, sowie in einem Vergleich zwischen den drei Gruppen. Zusätzlich nahmen zwei Probanden an einer Fallstudie teil, deren Ziel es war die langfristi-gen Wirkungen auf die Beweglichkeit der Faszie zu analysieren.
Ergebnisse: Nach der Behandlung mit der Foam Roll verbesserte sich die Beweglichkeit der FTL durchschnittlich um 1,7915 mm (p<0,001). Dagegen konnte in der Placebogruppe (p=0,397) und in der Kontrollgruppe (p=0,861) keine signifikante Verbesserung der Beweg-lichkeit verzeichnet werden. Messungen mit weiteren Messinstrumenten zeigten keine Verbesserungen. Bei den zwei Probanden der Fallstudie konnte, über einen Zeitraum von vier Wochen, eine Verbesserung der Beweglichkeit der FTL festgestellt werden.
Schlussfolgerung: Durch die Anwendung der Foam Roll konnte die Beweglichkeit der Fascia Thoracolumbalis signifikant verbessert werden.
Schlüsselwörter: Fascia Thoracolumbalis, Ultraschall, Foam Roll, Faszienbeweglichkeit
A successful integration of migrants in the labour market and in the organisations is getting more important based on demographic changes. The central aim of the investigation is to deal with problem fields of the Human Resource Management, which arise by demographic changes regarding migration. Therefore, an explorative qualitative study with human resource managers and diversity representatives of the large DAX companies was conducted. The views of leaders and employees with and without an immigration background regarding diversity potentials in organisation are compared in this study. The results indicate that diversity is important for organisation. Employees have recognised the importance of diversity. Managers have not recognised the seriousness and urgency of cultural diversity and diversity actions. Human resource managers are not able to assess the additional stress of migrants correctly and to consider them in their day-to-day management and diversity actions.
This paper introduces ideas to reduce talent scarcity by binding female talent in India. As a theoretical lens Neo-Institutionalism in the Indian context is combined with the family-relatedness of work decision model. The qualitative research design and first results as well as propositions for companies are included.
Talent scarcity in many parts of the world leads to the necessity to enlarge talent pools in order to provide enough future holders of key positions. Taking the scholarly discussion at the overlap of talent management and current careers literature as a starting point our qualitative empirical research provides insights in talent’s career decisions in an eastern emerging market, India, and a western developed country, Germany. 49 interviews with internationally experienced knowledge-workers were held to find out how to they come to career decisions throughout their career. Special focus was the balancing act of professional and private life sphere. An inductive-deductive approach was used to develop categories in MaxQda. Results show the impact of institutional frame, cultural context, and gender differences. Consequently, a stronger focus on talent’s different life phases with context specific deviations when configuring Talent Management in Multinational Enterprises can be advised.
Der Einsatz des ISOBUS zeigt, dass Bedarf an Datenkommunikation auch auf landtechnischen Gespannen besteht. Jedoch wird auch deutlich, dass der ISOBUS mit seiner relativ geringen Datenrate keine Ressourcenreserven für neue Anwendungen aufweist. Aus diesem Grund ist der Wechsel der Übertragungstechnologie für die Weiterentwicklung des ISOBUS zu einem High-Speed ISOBUS notwendig. Eine geeignete und im weiteren Verlauf näher betrachtete Technologie für den Wechsel ist Ethernet. Es wird gezeigt welche Potenziale für den ISOBUS durch Ethernet entstehen und welche Herausforderungen dabei bewältigt werden müssen.
Protection and privacy of data in cooperative agricultural processes : the challenges of the future
(2016)
In agriculture, the growing usage of sensors, smart mobile machinery and information systems results in high volumes of data. The data differs in accuracy, frequency, volume, type and, most importantly, owner of the information. However, cooperative processes and big data analyses require access to comprehensive amounts of data for successful agricultural operation and reasoning. In some processes instructed contractors even gather data belonging to other owners and use it for machinery operation optimisation and accounting (e.g. yield in maize harvest). Today’s approach of data handling has a high potential to conflict with European and national regulations for data protection and privacy. This article presents a concept for continuous data protection and privacy in cooperative agricultural processes. The concept aims at ensuring data sovereignty for the owner while making as much data usable for process operation and big data research at the same time. Briefly explained, owners pick a collection of data and create usage licenses for other players. The licenses specify time-limited and / or position-bound access to the data collection. Privacy environments in soft- and / or hardware protect access rights on end user devices, data share hubs and machinery devices such as agricultural terminals. In addition to access right configurations, digital signatures prevent data manipulation when cooperative players capture data during processes. Socalled signature boxes represent certificated soft- or hardware components, which are located close at data sources (e.g. as hardware attached to sensors on mobile machinery) and bind the data captured with digital signatures.
For Delay-Tolerant Networks (DTNs) many routing algorithms have been suggested. However, their performance depends heavily on the applied scenario. Especially heterogeneous scenarios featuring known and unknown node movements as well as different kinds of data lead to either poor delivery ratios or exhausted network resources.
To overcome these problems this paper introduces Data-Driven Routing for DTNs. Data is categorized according to its requirements into priority queues. Each queue applies an appropriate DTN routing algorithm that fits the data requirements best. Simulation results show that Data-Driven Routing allows high delivery ratios for time-critical data while saving network resources during the transfer of less time-critical data at the same time.
Management of agricultural processes is often troubled by disconnections and data transfer failures. Limited cellular network coverage may prevent information exchange between mobile process participants.
The research projects KOMOBAR and ISOCom designed, implemented und field-tested a delay tolerant platform for robust communication in rural areas and challenging environments. An adaptable combination of infrastructure-based cellular networks and infrastructure-free multihop ad hoc communication (WLAN) leads to a variety of new communication opportunities. Temporal storage and forwarding of data on mobile farm machinery as well as dynamic platform configurations during process runtime strongly enhance reliability and robustness of data transfers.
Teachers in health informatics have a broad variety of international and national educational recommendations to rely on when designing programmes, curricula, courses and educational material. However, in addition they often need very specific information for their setting, blue-prints, hands-on experience and encouragement to try something new. This workshop presents three case studies from European universities who have implemented inter-professional, technology enabled health informatics courses in undergraduate, postgraduate and open university settings. These approaches will be put into the context of the TIGER recommendation framework that includes priority ratings of health informatics competencies and case studies to illustrate them. The workshop attendees will have ample opportunity to exchange ideas with the presenters and start a mutual learning process for health informatics teachers.