| 1. |
- Johansson, Maria, et al.
(författare)
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Women forestry professionals meaning making of gender and gender equality
- 2015
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Konferensbidrag (refereegranskat)abstract
- In this paper we explore meaning makings of gender equality in forestry by drawing on a national survey of all women with an academic forestry education in Sweden. We analyse two open-ended questions concerning their experiences of being a woman in forestry and how gender equality in forestry could be improved. The aim is to investigate how these narratives construct norms and notions of "gender equality" in relation to forestry. We identify three dominant logics where gender equality is constructed: 1, in relation to women and concerning numerical representation. 2, as gendered power relations and organisational norms and culture. 3, as something distant from themself by emphasising that their position in the industry is motivated by competence rather than gender. While issues of gender equality has climbed the agenda of the men dominated Swedish forestry, little is known about how these initiatives are being received and understood among men and women working in forestry. On-going research on men forestry professional indicates that "being on of the lads" still constitutes a ticket into the masculine community of forestry, and by here focusing on women forestry professionals meaning making of gender and gender equality interventions at work, this study adds to critical studies of gender equality.
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| 2. |
- Witrant, Emmanuel, et al.
(författare)
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Predictive control over wireless multi-hop networks
- 2007
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Ingår i: Proceedings Of The 2007 Ieee Conference On Control Applications. - : IEEE. - 9781424404438 ; , s. 1037-1042
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Konferensbidrag (refereegranskat)abstract
- Remote control over wireless multi-hop networks is considered. Time-varying delays for the transmission of sensor and control data over the wireless network are caused by a randomized multi-hop routing protocol. The characterstics of the routing protocol together with lower-layer network mechanisms give rise to a delay process with high variance and stepwise changing mean. A new predictive control scheme with a delay estimator is proposed in the paper. The estimator is based on a Kalman filter with a change detection algorithm. It is able to track the delay mean changes but efficiently attenuate the high frequency jitter The control scheme is analyzed and its implementation detailed. Network data from an experimental setup are used to illustrate the efficiency of the approach.
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| 3. |
- Cerdas, Sara, et al.
(författare)
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Development of Organisational and Psychosocial Work Factors Across Industries with Different Gender Composition in Sweden, 2003-2013
- 2018
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Ingår i: Book of proceedings: 13th Conference of the European Academy of Occupational Health Psychology. - Nottingham : European Academy of Occupational Health Psychology. - 9780992878641 ; , s. 34-35
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Konferensbidrag (refereegranskat)abstract
- Background: In Sweden, the development of mental ill-health and sickness absence has been poorer in female-dominated industries compared to others. One possible explanation is the different developments of psychosocial working conditions across industries. Men and women appear to react similarly to the same psychosocial exposures at work, but differences in exposure patterns may prevail. There is to date a lack of studies on the extent to which psychosocial work exposures are associated with the gender segregation on the Swedish labour market at the industry level. This study aims to investigate how organisational and psychosocial work factors have developed over time across industries with different gender composition in Sweden from 2003 to 2013, and to what extent these factors differ between industries.Methods: The present study is based on repeated cross-sectional data from the Swedish Work Environment Survey (SWES). SWES is conducted biennially by Statistics Sweden (SCB) and includes Swedish workers aged 16-64 years. Six waves from 2003 to 2013, comprising a study sample of 45,631 subjects, were analysed, Industries were categorised according to gender composition and divided into seven categories: 1) Goods and energy production; 2) Machine handling; 3) Manual services; 4) Public administration; 5) Knowledge intensive services; 6) Education; 7) Health and social care. Proportions of men and women in each industry who were exposed to adverse or positive organisational and psychosocial work factors were calculated for each of the six waves. Logistic regression analyses, adjusted for age, educational level and year of response to SWES were performed on the full sample (all six waves), in order to estimate the odds of being exposed to organisational and psychosocial work factors in each industry using the knowledge intensive service industry as the reference category.Results: Preliminary results show that in female dominated industries (Education and Health and social care), many organisational and psychosocial work factors developed poorly over the study period. Higher odds of exposure to adverse or positive organisational and psychosocial work factors were found for several industries when using the industry of Knowledge intensive services as the reference category.Conclusion: This study is one of the first of its kind analysing the development of organisational and psychosocial work factors, as well as differences in these factors between industries with different gender compositions in Sweden.
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| 4. |
- Di Marco, Piergiuseppe, et al.
(författare)
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A dynamic energy-efficient protocol for reliable and timely communications for wireless sensor networks in control and automation
- 2009
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Ingår i: 2009 6th IEEE Annual Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks Workshops. - 9781424439386 ; , s. 146-148
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Konferensbidrag (refereegranskat)abstract
- Designing quality of service (QoS) guaranteed communication protocol for wireless sensor networks (WSNs) is essential to exploit the advantages and flexibilities offered by this technology for real-time control and actuation applications. A novel cross-layer protocol that embraces altogether a semirandom routing, MAC, data aggregation, and radio power control for clustered WSNs is presented. The protocol leverages the combination of a randomized and a deterministic approach to ensure robustness over unreliable channels and packet losses. An optimization problem, whose objective function is the network energy consumption, and the constraints are reliability and latency of the packets is modelled and solved to adaptively select the protocol parameters by a simple algorithm. As a relevant contribution, the proposed protocol is completely implemented on a test-bed, and it is compared to existing protocols. Experimental results validate the analysis and show excellent performance in terms of reliability, latency, low node duty cycle, load balancing and dynamic adaptation to the application requirements.
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| 5. |
- Di Marco, Piergiuseppe, et al.
(författare)
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TREnD : A timely, reliable, energy-efficient and dynamic wsn protocol for control applications
- 2010
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Ingår i: IEEE International Conference on Communications. - 9781424464043
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Konferensbidrag (refereegranskat)abstract
- Control applications over wireless sensor networks (WSNs) require timely, reliable, and energy efficient communications. Cross-layer interaction is an essential design paradigm to exploit the complex interaction among the layers of the protocol stack and reach a maximum efficiency. Such a design approach is challenging because reliability and latency of delivered packets and energy are at odds, and resource constrained nodes support only simple algorithms. In this paper, the TREnD protocol is introduced for control applications over WSNs in industrial environments. It is a cross-layer protocol that embraces efficiently routing algorithm, MAC, data aggregation, duty cycling, and radio power control. 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. TREnD uses a simple algorithm that allows the network to meet the reliability and latency required by the control application while minimizing for energy consumption. TREnD is implemented on a test-bed and compared to some existing protocols. Experimental results show good performance in terms of reliability, latency, low duty cycle, and load balancing for both static and time-varying scenarios.
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| 6. |
- Dymitrow, Mirek, et al.
(författare)
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Transcending the rural-urban meme: Hammarkullen – a landscape caught in-between
- 2014
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Ingår i: Unraveling the logics of landscape. Eds.: Stenseke, M., Dymitrow, M., Saltzman, K. et al.; 26th session of the Permanent European Conference for the Study of the Rural Landscape, 8–12 September, University of Gothenburg, Gothenburg & Mariestad, Sweden. - : University of Gothenburg, Sweden. ; , s. 103-103
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- People’s different relations towards their environment are always the result of how they perceive it and how different spatialities are ascribed symbolic meaning. Taking into account these relations when formulating policies aimed at solving various problems could offer valuable knowledge for more sustainable planning and management. In certain areas, however, achieving this goal might prove extra problematic due to the preconceived vision of how problems associated with certain spatialities ought to be handled. Hammarkullen, a suburb of Gothenburg, is an extreme example of this. For decades facing socio-economic and structural problems, the struggles of Hammarkullen could be described as a “wicked problem”. Many programs have been undertaken to address it, the latest of which is one of Sweden’s largest EU-projects within urban development. In light of the considerable criticism it has received, we evaluated its inadequacy to solve the identified problems through three case studies. We conclude that a major contributing factor is the urban bias impregnating the design of urban development projects. It happens because the concept of “urbanity” is not one-dimensional (there are at least 40 attributes defining it); moreover it is juxtaposed “rurality” as its conceptual counterpart. Since any of the constitutive attributes is neither fully “rural” nor “urban”, different spatialities assume manifold overlapping combinations. Although Hammarkullen has an urban morphology, many of its attributes fall within the conceptual range of “rurality”, and should be addressed accordingly. However, since urbanity is most often viewed as morphology, the “urban shell” of Hammarkullen inadvertently prompts “urban” development projects. In that light, we resort to a landscape approach as an alternative conceptual tool to circumvent the rural-urban impasse in problem-solving. As a relational, non-essentialist technique, a landscape approach has the potential to capture the individual needs of each spatiality, including those that are not necessarily aligned with a conceptual rural-urban axis.
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| 7. |
- Fischione, Carlo, et al.
(författare)
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Medium Access Control Analytical Modeling and Optimization in Unslotted IEEE 802.15.4 Wireless Sensor Networks
- 2009
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Ingår i: 2009 6TH ANNUAL IEEE COMMUNICATIONS SOCIETY CONFERENCE ON SENSOR, MESH AND AD HOC COMMUNICATIONS AND NETWORKS (SECON 2009). - NEW YORK : IEEE. - 9781424429073 ; , s. 440-448
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Konferensbidrag (refereegranskat)abstract
- Accurate analytical expressions of delay and packet reception probabilities, and energy consumption of duty-cycled wireless sensor networks with random medium access control (MAC) are instrumental for the efficient design and optimization of these resource-constrained networks. Given a clustered network topology with unslotted IEEE 802.15.4 and preamble sampling MAC, a novel approach to the modeling of the delay, reliability, and energy consumption is proposed. The challenging part in such a modeling is the random MAC and sleep policy of the receivers, which prevents to establish the exact time of data packet transmission. The analysis gives expressions as function of sleep time, listening time, traffic rate and MAC parameters. The analytical results are then used to optimize the duty cycle of the nodes and MAC protocol parameters. The approach provides a significant reduction of the energy consumption compared to existing solutions in the literature. Monte Carlo simulations by ns2 assess the validity of the analysis.
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| 8. |
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| 9. |
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| 10. |
- Park, Pan Gun, et al.
(författare)
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A generalized Markov chain model for effective analysis of slotted IEEE 802.15.4
- 2009
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Ingår i: 2009 IEEE 6th International Conference on Mobile Adhoc and Sensor Systems. - 9781424451135 ; , s. 130-139
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Konferensbidrag (refereegranskat)abstract
- A generalized analysis of the IEEE 802.15.4 medium access control (MAC) protocol in terms of reliability, delay and energy consumption is presented. The IEEE 802.15.4 exponential backoff process is modeled through a Markov chain taking into account retry limits, acknowledgements, and unsaturated traffic. Simple and effective approximations of the reliability, delay and energy consumption under low traffic regime are proposed. It is demonstrated that the delay distribution of IEEE 802.15.4 depends mainly on MAC parameters and collision probability. In addition, the impact of MAC parameters on the performance metrics is analyzed. The analysis is more general and gives more accurate results than existing methods in the literature. Monte Carlo simulations confirm that the proposed approximations offer a satisfactory accuracy.
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