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- Andersson, Per, et al.
(författare)
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Cooperation and Competition during Evolution of Technology Based Service Innovation : The Case of Development of NFC Enabled Mobile Services in Nice
- 2013
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Ingår i: 12th International Conference on Mobile Business, ICMB 2013. - : Association for Information Systems.
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Konferensbidrag (refereegranskat)abstract
- Concurrent cooperation and competition is an important characteristic of innovation processes. We illustrate this with reference to a case on new mobile, NFC (Near Field Communications) based services: a systemic service innovation project in Nice, named Cityzi. Cityzi is a local sub-process in the globally dispersed efforts to develop and implement mobile services enabled by the NFC technique that can be used for mobile communication. The project requires cooperation, also between competing actors, to determine technical interfaces as well as development and implementation of business models for production and use of the services in practice. Due to the heterogeneity of resources that need to be combined, actors from different industrial as well as public policy sectors participate in the project. We apply a network perspective for our analysis of cooperation and competition during service innovation processes, specifically focusing on network overlapping processes. A dynamic conceptual model is suggested to capture the complexities of implementing largescale ICT infrastructure projects, when going from trial to commercialization.
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| 3. |
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Crafting Cultural Heritage
- 2016
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Samlingsverk (redaktörskap) (refereegranskat)abstract
- The making of artefacts is a core activity in society, the result of which contributes to the building up of our physical surroundings and material culture. Throughout history, craft skills have been highly appreciated and have often been seen as crucial component of a capable human. Despite this, the knowledge base that constitutes the actual making is often overlooked in research. What can we learn about things by learning about their making? How do different craft skills offer an understanding of its historical use? How can theoretical and methodological approaches be developed concerning the actual making? How can we study and understand craft as cultural heritage? This book contains a selecion of papers from the session Crafting Cultural Heritage at the Assosiation of Critical Heritage studies inaugural conference Re/theorising Heritage 2012 in Gothenburg. The contributors are Anneli Palmsköld; Thomas Laurien; Eleonora Lupo and Elena Giunta; Gunnar Almevik and Nicola Donovan. Their common interest are theories and methods of crafting that could benefit heritage studies approach to making.
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Crafting Cultural Heritage
- 2014
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Proceedings (redaktörskap) (refereegranskat)abstract
- The making of artefacts is a core activity in society, the result of which contributes to the building up of our physical surroundings and material culture. Throughout history, craft skills have been highly appreciated and have often been seen as crucial component of a capable human. Despite this, the knowledge base that constitutes the actual making is often overlooked in research within humanities. In this publication we discuss theories and methods of crafting that might benefit cultural heritage studies approach to making, from the artistic, historical, or aesthetical point of view. We deal with discussions on questions such as: What can we learn about things by learning about their making? How do different craft skills offer an understanding of its historical use? How can theoretical and methodological approaches be developed concerning the actual making?
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| 5. |
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Crafting Cultural Heritage
- 2012
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Proceedings (redaktörskap) (refereegranskat)abstract
- The making of artefacts is a core activity in society, the result of which contributes to the building up of our physical surroundings and material culture. Throughout history, craft skills have been highly appreciated and have often been seen as crucial component of a capable human. Despite this, the knowledge base that constitutes the actual making is often overlooked in research. In this session we want to discuss theories and methods of crafting that might benefit heritage studies approach to making. We welcome discussions on questions such as : What can we learn about things by learning about their making? How do different craft skills offer an understanding of its historical use? How can theoretical and methodological approaches be developed concerning the actual making? How can we study and understand craft as cultural heritage?
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| 6. |
- Elezovic, Suad, 1965-
(författare)
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Modeling financial volatility : A functional approach with applications to Swedish limit order book data
- 2009
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis is designed to offer an approach to modeling volatility in the Swedish limit order market. Realized quadratic variation is used as an estimator of the integrated variance, which is a measure of the variability of a stochastic process in continuous time. Moreover, a functional time series model for the realized quadratic variation is introduced. A two-step estimation procedure for such a model is then proposed. Some properties of the proposed two-step estimator are discussed and illustrated through an application to high-frequency financial data and simulated experiments. In Paper I, the concept of realized quadratic variation, obtained from the bid and ask curves, is presented. In particular, an application to the Swedish limit order book data is performed using signature plots to determine an optimal sampling frequency for the computations. The paper is the first study that introduces realized quadratic variation in a functional context. Paper II introduces functional time series models and apply them to the modeling of volatility in the Swedish limit order book. More precisely, a functional approach to the estimation of volatility dynamics of the spreads (differences between the bid and ask prices) is presented through a case study. For that purpose, a two-step procedure for the estimation of functional linear models is adapted to the estimation of a functional dynamic time series model. Paper III studies a two-step estimation procedure for the functional models introduced in Paper II. For that purpose, data is simulated using the Heston stochastic volatility model, thereby obtaining time series of realized quadratic variations as functions of relative quantities of shares. In the first step, a dynamic time series model is fitted to each time series. This results in a set of inefficient raw estimates of the coefficient functions. In the second step, the raw estimates are smoothed. The second step improves on the first step since it yields both smooth and more efficient estimates. In this simulation, the smooth estimates are shown to perform better in terms of mean squared error. Paper IV introduces an alternative to the two-step estimation procedure mentioned above. This is achieved by taking into account the correlation structure of the error terms obtained in the first step. The proposed estimator is based on seemingly unrelated regression representation. Then, a multivariate generalized least squares estimator is used in a first step and its smooth version in a second step. Some of the asymptotic properties of the resulting two-step procedure are discussed. The new procedure is illustrated with functional high-frequency financial data.
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