| 1. |
- Abrahamsson, Gun, 1977-, et al.
(författare)
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Ekonomiska ansvarsenheter
- 2013. - 1
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Ingår i: Perspektiv på ekonomistyrning. - Stockholm : Liber. - 9789147096947 ; , s. 14-35
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 2. |
- Fischione, Carlo, et al.
(författare)
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Design principles of wireless sensor networks protocols for control applications
- 2011
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Ingår i: Wireless Networking Based Control. - New York, NY : Springer-Verlag New York. - 9781441973924 ; , s. 203-238
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Bokkapitel (refereegranskat)abstract
- Control applications over wireless sensor networks (WSNs) require timely, reliable, and energy efficient communications. This is challenging because reliability and latency of delivered packets and energy are at odds, and resource constrained nodes support only simple algorithms. In this chapter, a new system-level design approach for protocols supporting control applications over WSNs is proposed. The approach suggests a joint optimization, or co-design, of the control specifications, networking layer, the medium access control layer, and physical layer. The protocol parameters are adapted by an optimization problem whose objective function is the network energy consumption, and the constraints are the reliability and latency of the packets as requested by the control application. The design method aims at the definition of simple algorithms that are easily implemented on resource constrained sensor nodes. These algorithms allow the network to meet the reliability and latency required by the control application while minimizing for energy consumption. The design method is illustrated by two protocols: Breath and TREnD, which are implemented on a test-bed and compared to some existing solutions. Experimental results show good performance of the protocols based on this design methodology in terms of reliability, latency, low duty cycle, and load balancing for both static and time-varying scenarios. It is concluded that a system-level design is the essential paradigm to exploit the complex interaction among the layers of the protocol stack and reach a maximum WSN efficiency.
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| 3. |
- Liestav, Gun, et al.
(författare)
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Gender perspectives on forest services in the rise of a bioeconomy discourse
- 2019
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Ingår i: Services in family forestry. - Cham : Springer Nature. - 9783030289980 - 9783030289997 ; , s. 307-325
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Bokkapitel (refereegranskat)abstract
- Building on the claim that gender matters, this chapter problematizes the possibilities and constraints that the rising bioeconomy discourse offers regarding the gendered practices of forestry. While (pre)industrial forestry centred around a goods-dominant logic ("the pile of timber"), contemporary forestry is in some ways incorporating a more service-dominant logic ("the pile of timber plus something else"). The gendered practice of forestry, however, still draws on notions of masculinity rooted in the physically demanding manual harvesting work, in tandem with technical know-how and the overall industry is struggling with gender equality issues. The emergence of the bioeconomy as a new meta-discourse in forestry, where the industry is aiming to articulate itself as sustainable, modern and competitive, may challange the almost all male structures of forestry so that the future of forestry is more diverse. We conclude that the bioeconomy is unlikely to solely challenge the gendered practices of forestry because of its inherent neoliberal gender blindness, but with awareness of gender and power, this new discourse may at least offer an opening for problematizing taken-for-granted practices and values which in turn have the potential to shape the forestry of tomorrow in a more inclusive and diverse way.
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| 4. |
- Nyberg, Anna, et al.
(författare)
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Psychosocial Working Conditions for Women and Men in Industries with Different Types of Production and Gender Composition : Sweden, 1991–2017
- 2021
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Ingår i: Gendered Norms at Work. - Cham : Springer Nature. - 2213-0497 .- 2213-0470. - 9783030777333 - 9783030777340 ; , s. 35-61
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Bokkapitel (refereegranskat)abstract
- The chapter aims to contribute to the understanding of increased gender differences in sickness absence and health by applying a structural approach, and by analysing and describing the development of and differences in psychosocial working conditions in differently gendered industries. Some psychosocial work factors are expected to vary by differently gendered industries, and others are expected to vary by differently gendered industries and gender combined. Descriptive and comparative data of psychosocial working conditions for women and men in Sweden from the 1990s and onwards are presented. The results show that job demands and decision authority have developed more negatively in female-gendered industries for both genders since the early 1990s, although more negatively for women. Job demands are furthermore higher and decision authority lower in these industries among both men and women. Gender-based and sexual harassment, on the other hand, show a pattern between gendered industries and gender combined, such that more harassment occurs for men in female-gendered industries and for women in male-gendered industries. The results are discussed in relation to contextual and gender perspectives.
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| 5. |
- Park, Pan Gun, et al.
(författare)
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Adaptive IEEE 802.15.4 medium access control protocol for control and monitoring applications
- 2011
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Ingår i: Wireless Networking Based Control. - New York, NY : Springer Science+Business Media B.V.. - 1441973923 ; , s. 271-300
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Bokkapitel (refereegranskat)abstract
- The IEEE 802.15.4 standard for wireless sensor networks (WSNs) can support energy efficient, reliable, and timely packet transmission by tuning the medium access control (MAC) parameters macMinBE; macMaxCSMABackoffs, and macMaxFrameRetries. Such a tuning is difficult, because simple and accurate models of the influence of these parameters on the probability of successful packet transmission, packet delay, and energy consumption are not available. Moreover, it is not clear how to adapt the parameters to the changes of the network and traffic regimes by algorithms that can run on resource-constrained nodes. In this chapter, a generalizedMarkov chain is proposed to model these relations by simple expressions without giving up the accuracy. In contrast to previous work, the presence of limited number of retransmissions, acknowledgments, unsaturated traffic, and packet size is accounted for. The model is then used to derive an adaptive algorithm forminimizing the power consumptionwhile guaranteeing reliability and delay constraints in the packet transmission. The algorithm does not require any modification of the IEEE 802.15.4 standard and can be easily implemented on network nodes. Numerical results show that the analysis is accurate and that the proposed algorithm satisfies reliability and delay constraints, and ensures a longer lifetime of the network under both stationary and transient network conditions.
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