| 1. |
- Hakanen, Jussi, et al.
(författare)
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An Application of Multiobjective Optimization to Process Simulation
- 2004
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Ingår i: CD-Proceedings of 4th European Congress on Computational Methods in Applied Sciences and Engineering.
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Konferensbidrag (refereegranskat)abstract
- We study multiobjective optimization problems arising from chemical process simulation. Interactive multiobjective optimization method NIMBUS, developed at the University of Jyväskylä, is combined with the BALAS process simulator, developed at theTechnical Research Center of Finland, in order to provide a new interactive tool for designing chemical processes. Continuous interaction between the method and the designer provides an efficient approach to explore the Pareto optimal solutions and helps the designer to learn about the behaviour of the process. This new approach has been applied to a water allocation problem for an integrated plant containing a thermomechanical pulping plant and a paper mill.
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| 2. |
- Hämäläinen, Jari, et al.
(författare)
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Multiobjective Decision Making for Papermaking
- 2004
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Ingår i: CD-Proceedings of MCDM2004, the 17th International Conference on Multiple Criteria Decision Making.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 3. |
- Mäkelä, M. M., et al.
(författare)
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Rosette nebula globules : Seahorse giving birth to a star
- 2017
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Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 605
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Tidskriftsartikel (refereegranskat)abstract
- Context. The Rosette nebula is an H II region ionized mainly by the stellar cluster NGC 2244. Elephant trunks, globules, and globulettes are seen at the interface where the H II region and the surrounding molecular shell meet.Aims. We have observed a field in the northwestern part of the Rosette nebula where we study the small globules protruding from the shell. Our aim is to measure their properties and study their star-formation history in continuation of our earlier study of the features of the region.Methods. We imaged the region in broadband near-infrared (NIR) JsHKs filters and narrowband H-2 1-0 S(1), P beta, and continuum filters using the SOFI camera at the ESO/NTT. The imaging was used to study the stellar population and surface brightness, create visual extinction maps, and locate star formation. Mid-infrared (MIR) Spitzer IRAC and WISE and optical NOT images were used to further study the star formation and the structure of the globules. The NIR and MIR observations indicate an outflow, which is confirmed with CO observations made with APEX.Results. The globules have mean number densities of similar to 4.6x10(4) cm(-3). P beta is seen in absorption in the cores of the globules where we measure visual extinctions of 11-16 mag. The shell and the globules have bright rims in the observed bands. In the Ks band 20 to 40% of the emission is due to fluorescent emission in the 2.12 mu m H-2 line similar to the tiny dense globulettes we studied earlier in a nearby region. We identify several stellar NIR excess candidates and four of them are also detected in the Spitzer IRAC 8.0 mu m image and studied further. We find an outflow with a cavity wall bright in the 2.124 mu m H-2 line and at 8.0 mu m in one of the globules. The outflow originates from a Class I young stellar object (YSO) embedded deep inside the globule. An H alpha image suggests the YSO drives a possible parsec-scale outflow. Despite the morphology of the globule, the outflow does not seem to run inside the dusty fingers extending from the main globule body.
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| 4. |
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| 5. |
- Ojalehto, V., et al.
(författare)
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Interactive Software for Multiobjective Optimization: IND-NIMBUS
- 2007
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Ingår i: WSEAS Transactions on Computers. - 1109-2750. ; 6:1, s. 87-94
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Tidskriftsartikel (refereegranskat)abstract
- IND-NIMBUS is a implementation of the interactive NIMBUS method for multiobjective optimization. The system is suitable for solving multiobjective optimization problems modeled in different types of softwares.
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| 6. |
- Saariluoma, P., et al.
(författare)
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Mental Contents in Interacting with a Multiobjective Optimization Program
- 2008
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Ingår i: International Journal of Technology and Human Interaction. - 1548-3908 .- 1548-3916. ; 4:3, s. 43-67
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Tidskriftsartikel (refereegranskat)abstract
- User psychology aims at understanding human-machine interaction from a psychological point of view. Its ultimate goal is to provide knowledge about human psychological properties for interaction designers. In this article, we are particularly interested in applying the theoretical concepts of mental contents (i.e., the information contents of users mental representations), in studying interaction with professional software. The immediate motivation for adopting such an approach arises from problems met in designing interaction processes in multiobjective optimization software. These types of software are meant to support complex thought and decision-making processes and this is why interaction design has to meet a number of theoretical problems, which do seldom arise in simpler interaction types. In four experiments, we investigated the types of knowledge required when developing ones capability of working with such a thought tool. We observed that in interaction design it is essential to take into account domain, professional and software specific mental content structures.
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