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1 – 10 of 385Martin Gutbrod, Christian Werner and Stefan Fischer
One of today’s major problems in the field of e‐learning is that the creation of high‐quality content is still rather time consuming and expensive. In the past, many efforts have…
Abstract
One of today’s major problems in the field of e‐learning is that the creation of high‐quality content is still rather time consuming and expensive. In the past, many efforts have been made to produce educational content on the fly, but the results were mainly static blocks of recorded lecture lacking sophisticated navigation facilities. Facing this challenge the authors developed the concept of hyper‐presentations. During the live presentation content‐ and time‐based metadata is captured and stored in a lightweight and player‐independent format. With this metadata powerful navigation facilities like real time navigation and full text search in audio or video data can be generated automatically. This improves flexibility and interoperability of technical solutions, which are both key factors in the emerging rapid e‐learning market.
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Nils Hoeller, Christoph Reinke, Jana Neumann, Sven Groppe, Christian Werner and Volker Linnemann
In the last decade, XML has become the de facto standard for data exchange in the world wide web (WWW). The positive benefits of data exchangeability to support system and…
Abstract
Purpose
In the last decade, XML has become the de facto standard for data exchange in the world wide web (WWW). The positive benefits of data exchangeability to support system and software heterogeneity on application level and easy WWW integration make XML an ideal data format for many other application and network scenarios like wireless sensor networks (WSNs). Moreover, the usage of XML encourages using standardized techniques like SOAP to adapt the service‐oriented paradigm to sensor network engineering. Nevertheless, integrating XML usage in WSN data management is limited by the low hardware resources that require efficient XML data management strategies suitable to bridge the general resource gap. The purpose of this paper is to present two separate strategies on integrating XML data management in WSNs.
Design/methodology/approach
The paper presents two separate strategies on integrating XML data management in WSNs that have been implemented and are running on today's sensor node platforms. The paper shows how XML data can be processed and how XPath queries can be evaluated dynamically. In an extended evaluation, the performance of both strategies concerning the memory and energy efficiency are compared and both solutions are shown to have application domains fully applicable on today's sensor node products.
Findings
This work shows that dynamic XML data management and query evaluation is possible on sensor nodes with strict limitations in terms of memory, processing power and energy supply.
Originality/value
The paper presents an optimized stream‐based XML compression technique and shows how XML queries can be evaluated on compressed XML bit streams using generic pushdown automata. To the best of the authors' knowledge, this is the first complete approach on integrating dynamic XML data management into WSNs.
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Marcus Maiwald, Christian Werner, Volker Zöllmer and Matthias Busse
The purpose of this paper is to highlight INKtelligent printed sensor structures using maskless depositition technologies.
Abstract
Purpose
The purpose of this paper is to highlight INKtelligent printed sensor structures using maskless depositition technologies.
Design/methodology/approach
This paper begins with a general introduction to INKtelligent printing®. Starting with layout and ink development, the fabrication of printed sensors is described in detail.
Findings
Printed strain gauges, thermopiles and gas sensitive films are successfully fabricated with maskless deposition technologies, offering advantages for continuous non‐destructive measurement compared to conventional sensors.
Originality/value
This paper shows a new approach for customized sensor structures. The application of a resource efficient and flexible printing technique for sensor fabrication is demonstrated.
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Hans‐Christian Pfohl and Werner Zöllner
Argues that the organization for logistics often favours an aggregation of all tasks into one department. This decision presupposes an extensive analysis of important contingency…
Abstract
Argues that the organization for logistics often favours an aggregation of all tasks into one department. This decision presupposes an extensive analysis of important contingency factors, like product line, environmental relations, technology and organizational size. However, such contingency factors have a limited influence, and are modified by the strategy of the organization. Defines selected contingency factors, examines the organization’s overall strategy and shows how these two factors can be combined in the light of the specific requirements of the firm’s logistical task.
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Nobody concerned with political economy can neglect the history of economic doctrines. Structural changes in the economy and society influence economic thinking and, conversely…
Abstract
Nobody concerned with political economy can neglect the history of economic doctrines. Structural changes in the economy and society influence economic thinking and, conversely, innovative thought structures and attitudes have almost always forced economic institutions and modes of behaviour to adjust. We learn from the history of economic doctrines how a particular theory emerged and whether, and in which environment, it could take root. We can see how a school evolves out of a common methodological perception and similar techniques of analysis, and how it has to establish itself. The interaction between unresolved problems on the one hand, and the search for better solutions or explanations on the other, leads to a change in paradigma and to the formation of new lines of reasoning. As long as the real world is subject to progress and change scientific search for explanation must out of necessity continue.
Susanne Schlepphorst, Elizabeth C. Koetter, Arndt Werner, Christian Soost and Petra Moog
Drawing on human capital (HC) and social capital (SC) as well as the Jack-of-all-trades theory, this paper aims to clarify the relationship between international assignments (IAs…
Abstract
Purpose
Drawing on human capital (HC) and social capital (SC) as well as the Jack-of-all-trades theory, this paper aims to clarify the relationship between international assignments (IAs) of employees and their entrepreneurial intentions. The study proposes that such IAs provide specific environmental features which may enable employees to build up diverse skills and network relations conducive to entrepreneuship.
Design/methodology/approach
The authors collected data using an online survey, targeting professionals and managers in Germany and Switzerland. They used 223 complete responses. Before data collection, they ensured the suitability of their questionnaire by employing well-tested scales and consulted independent experts in survey design and methodology. They tested their hypotheses by applying multiple mediation modeling.
Findings
As hypothesized, the authors find empirical evidence that diverse skills and network relationships as well as poor career prospects, positively mediate the relationship between IAs and entrepreneurial intentions of employees.
Research limitations/implications
We applied simple random and the snowball sampling method. Our approach involved the use of headhunters, international employers and relocation companies as multipliers.
Practical implications
Our results have practical implications for employees and employers. Employees on international assignments can proactively pursue opportunities in order to utilize the acquired experiences and resources for taking up entrepreneurial activities. Employers can try to retain these employees to facilitate (international) corporate entrepreneurship.
Originality/value
To the best of our knowledge, this is the first empirical study to highlight the entrepreneurial ambitions of international assignees. It thus provides initial insights into this topic.
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Werner Renhart, Oszkár Bíró, Christian Magele, Kurt Preis and Alexander Rabel
The purpose of this paper is the modelling and estimation of inrush currents while energising power devices under no load conditions. An analytical representation of the nonlinear…
Abstract
Purpose
The purpose of this paper is the modelling and estimation of inrush currents while energising power devices under no load conditions. An analytical representation of the nonlinear B-H curve serves for considering the hysteresis behaviour in the numerical model.
Design/methodology/approach
The model is implemented into a standard finite element formulation to compute transient problems.
Findings
Inrush currents behave like faults in power distribution facilities. Its prior estimation helps to distinguish between operating conditions and faults.
Research limitations/implications
The magnetic cores may become extremely magnetised. At such high material saturations, the material characteristics are not measurable accurately. Hence, the results depend on the extrapolation of the B-H curves.
Originality/value
The use of first-order reversal curves within the major hysteresis loops helps in a convenient way to estimate peak and shape of the inrush currents.
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Birgit Hofreiter, Christian Huemer and Werner Winiwarter
Prior to conducting business via the Web, business partners agree on the business processes they are able to support. In ebXML, the choreography of these business processes is…
Abstract
Prior to conducting business via the Web, business partners agree on the business processes they are able to support. In ebXML, the choreography of these business processes is described as an instance of the so‐called business process specification schema (BPSS). For execution purposes the BPSS must be defined in the exact business context of the partnership. Reference models for B2B processes developed by standard organizations usually span over multiple business contexts to avoid a multitude of similar processes. In this paper we present how business collaboration models following the UN/CEFACT Modeling Methodology (UMM) are expressed in ebXML BPSS. To allow a mapping from multi‐context business collaboration models to a context‐specific choreography in ebXML BPSS we extend UMM to capture constraints for different business contexts
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Daniel J. Davis, David J. Scheaf and Eleanor B. Williams
Oppositional organizational identities are fraught with conflict and often evoke powerful social and cultural identities. Such identities may be a divisive force among consumers…
Abstract
Purpose
Oppositional organizational identities are fraught with conflict and often evoke powerful social and cultural identities. Such identities may be a divisive force among consumers. The purpose of this paper is to understand how consumers construct frames that facilitate identification with oppositional organizational identities.
Design/methodology/approach
The authors use online reviews from TripAdvisor.com and Yelp.com of the Creation Museum in Kentucky, USA. The Creation Museum is an ideal research context due to its location within American public discourse regarding religion and science. Through a grounded theory approach of the reviews, the authors propose three identity frames.
Findings
The data suggest that consumers primarily construct three frames to identify with the Creation Museum: transformational experiences, interpretive bricolage and oppositional scripts. Together, these frames engender resonance and facilitate consumer identification.
Originality/value
This paper is one of the first to examine how oppositional organizational identities garner consumer support. Given that consumers are increasingly attentive to organizational processes and the ubiquity of information technology, which reduces the costs of information and interaction, the study provides a much more holistic perspective on oppositional organizational identity and offers a multitude of future avenues for further research.
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