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- Sandström, Kristian, et al.
(författare)
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Data Distribution Service for Industrial Automation
- 2012
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Ingår i: 17th IEEE International Conference on Emerging Technologies & Factory Automation (ETFA'12). - Krakow, Poland.
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Konferensbidrag (refereegranskat)abstract
- The IEC 61499 is an open standard for the next generation of distributed control and automation. Data Distribution Service for Real-Time Systems (DDS) is a specification of a publish/subscribe middleware for distributed systems, created by the Object Management Group (OMG) to standardize a data-centric publish-subscribe programming model for distributed systems. This paper evaluates the DDS communication performance based on a model built within the IEC 61499 standard and compares it with the traditional socket based solution for communication. According to the test results, the DDS communication has the potential to reduce the complexity and is suggested as a suitable solution for some classes of industrial control systems.
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- Sandström, Kristian, et al.
(författare)
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On Jitter in Time Partitioned Real-Time Systems
- 2012
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Ingår i: IEEE Symposium on Emerging Technologies and Factory Automation, ETFA 2012. - 978-146734737-2
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Konferensbidrag (refereegranskat)abstract
- Recent trends towards adopting hypervisors, hierarchical scheduling, and other virtualization technologies that achieve partitioned access to the CPU and other resources impose significant impact with respect to jitter performance in embedded real-time systems. In this paper we make a first step towards characterization, modeling and calculation of this jitter.
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- Sandström, Kristian, et al.
(författare)
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On Jitter in Time Partitioned Real-Time Systems
- 2012
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Ingår i: 17th IEEE International Conference on Emerging Technologies & Factory Automation (ETFA'12), Work-in-Progress (WiP) session. - Krakow, Poland.
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Konferensbidrag (refereegranskat)
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- Sandström, Malin, 1980-, et al.
(författare)
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A Bulb Model Implementing Fuzzy Coding of Odor Concentration
- 2009
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Ingår i: Olfaction and Electronic Nose : Proceedings of the 13th International Symposium on Olfaction and Electronic Nose. - 978-0-7354-0674-2 ; s. 159-162
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Konferensbidrag (refereegranskat)abstract
- It is commonly accepted that the olfactory bulb (OB) codes for odor quality by specific patterns of activated glomeruli. However, no such consensus has been reached for how the OB codes for odor concentration. We have constructed a model of the olfactory bulb which is able to generate a "fuzzy code" for odor concentration, while still coding for odor identity and showing synchronization of active mitral cells. The fuzzy code arises from competitive inhibition in the glomerular layer of the model. Fuzzy concentration coding could explain how the OB might encode odor concentration while still encoding odor quality according to the consensus view above.
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- Sandström, Niklas, et al.
(författare)
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Electrohydrodynamic enhanced transport and trapping of airborne particles to a microfluidic air-liquid interface
- 2008
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Ingår i: 21st IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2008 : Tucson, AZ; 13 January 2008 through 17 January 2008. - 978-1-4244-1792-6 ; s. 595-598
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Konferensbidrag (refereegranskat)abstract
- We introduce a novel approach for greatly improved transport and trapping of airborne sample to a microfluidic analysis system by integrating an electrohydrodynamic (EHD) air pump with a microfluidic air-liquid interface. In our system, a negative corona discharge partially ionizes the air around a sharp electrode tip while the electrostatic field accelerates airborne particles towards an electrically grounded liquid surface, where they absorb. The air-liquid interface is fixated at the microscale pores of a perforated silicon diaphragm, each pore functioning as a static Laplace valve. Our system was experimentally tested using airborne smoke particles of ammonium chloride and aqueous salt solution as the liquid. We measured that EHD enhanced transport of the particles from the air into the liquid is enhanced over 130 times compared to passive trapping.
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