| 1. |
- Amani, Mozdeh, et al.
(author)
-
Buckling and postbuckling behavior of unstiffened slender curved plates under uniform shear
- 2011
-
In: Thin-Walled Structures. - : Elsevier BV. - 0263-8231. ; 49:8, s. 1017-1031
-
Journal article (peer-reviewed)abstract
- Buckling and postbuckling behavior of curved plates under in-plane shear are investigated. Afterrevisiting classic elastic buckling results, the elastoplastic postbuckling behavior and the effects ofcurvature parameter and aspect ratio are simulated via geometrical and material nonlinear analyses.Imperfection sensitivity is studied for various imperfection shapes and magnitudes. An increase incurvature parameter raises the elastic buckling load, produces unstable buckling and reducespostbuckling reserves. The buckling load and shear capacity are higher in shorter plates. Small initialimperfections are found to have severe effects on the initial buckling load of plates with large curvatureparameter, but little effect on ultimate postbuckling capacity.
|
|
| 2. |
- Amani, Pegah, 1983, et al.
(author)
-
Food product clustering for customized food logistics
- 2013
-
In: 7th International European Forum (Igls-Forum) - (136th EAAE Seminar) on System Dynamics and Innovation in Food Networks , Innsbruck-Igls, Austria.
-
Conference paper (other academic/artistic)
|
|
| 3. |
- Kjellsdotter, Linea, 1980, et al.
(author)
-
The fit between food product characteristics and logistics solution
- 2013
-
In: NOFOMA, Göteborg, Sweden.
-
Conference paper (peer-reviewed)abstract
- Purpose – This paper develops a conceptual framework for how to identify a fit between food product characteristics and logistics solutions within transportation, warehousing and material handling. Focus is on tactical decisions within an existing supply chain structure. Design/methodology/approach - The research is based on literature studies, workshops with experts from Swedish Institute for Food Science and examples from companies active in the food supply chain. Findings – It is identified that product value, demand and supply uncertainty, shelf life and product sensitiveness places requirements on transportation, warehousing and material handling in terms of costs, flexibility, time and quality. A two step framework is developed which identifies what the risks are of conflicting requirements of the product characteristics on the logistics solution.Research limitations/implications - Limitations of the paper are connected to the conceptual nature of the framework and the use of only four practical examples. Further research is to apply the framework in practice and the use of other perspective as the point of departure, e.g. strategic decisions and supply chain processes such as sourcing, purchasing, and manufacturing. Practical implications – Food supply chain actors involved in transportation, warehousing and material handling can use the framework in discussions of appropriate logistics solutions within an existing supply chain structure depending on a product’s characteristics. Originality/value - This paper, in comparison to previous studies within food supply chain management, contributes by taking a wide focus on food products and including all actors in the supply chain. It adds the perspective of transportation, warehousing and material handling to existing frameworks and recognises the importance of the surrounding environment affecting the product quality as the product move through the supply chain.
|
|
| 4. |
- Park, Byung-wook, et al.
(author)
-
Neutral, Polaron, and Bipolaron States in PEDOT Prepared by Photoelectrochernical Polymerization and the Effect on Charge Generation Mechanism in the Solid-State Dye-Sensitized Solar Cell
- 2013
-
In: The Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 117:44, s. 22484-22491
-
Journal article (peer-reviewed)abstract
- We investigate dye-sensitized solar cells (DSSCs) based on PEDOT as hole conductor and prepared by photoelectrochemical polymer deposition at different light intensities. We specifically investigate the effect of light intensity on the PEDOT polymer and in turn the efficiency of the solar cells. We find that the PEDOT prepared by this method is largely oxidized and contains significant amounts of polarons and bipolarons and only a small fraction of neutral PEDOT. Photoelectrochemical polymer deposition under low light intensity leads to a particularly low fraction of neutral PEDOT and a high fraction of bipolarons as measured in the UV-vis spectra. The solar cells based on PEDOT as a hole conductor prepared under these conditions are the most efficient with a higher power conversion efficiency, which can be explained by a longer electron lifetime, faster charge transport, and higher transparency of the PEDOT. Interestingly, we conclude that in this type of solid-state DSSCs the mechanism of dye regeneration occurs from PEDOT polarons that then form bipolarons, which is different from the mechanism of dye regeneration proposed in standard solid-state DSSCs.
|
|
| 5. |
|
|
| 6. |
- Yang, Lei, et al.
(author)
-
New Approach for Preparation of Efficient Solid-State Dye-Sensitized Solar Cells by Photoelectrochemical Polymerization in Aqueous Micellar Solution
- 2013
-
In: Journal of Physical Chemistry Letters. - : American Chemical Society (ACS). - 1948-7185 .- 1948-7185. ; 4:23, s. 4026-4031
-
Journal article (peer-reviewed)abstract
- Hereby, we present a new, cost-effective, and environmentally friendly method of preparing an efficient solid-state dye-sensitized solar cell (sDSC) using a PEDOT conducting polymer as the hole conductor and a recently developed organic sensitizer. PEDOT is generated and deposited on the dye-sensitized TiO2 electrode by in situ photoelectropolymerization of bis-EDOT in aqueous micellar solution. The advantages of this approach are the use of water as the solvent and the obtainment of a sDSC simply by adding a silver layer on the as-obtained polymer film deposited on dye/TiO2 without the need for electrolytic solution. The sDSC containing the film prepared as above is compared to those where the organic dye is used to generate the same polymer film but in organic solvent. The energy conversion efficiency values of the two cells appear comparable, 4.8% for sDSC prepared in the aqueous-phase polymerized PEDOT and 6% for the sDSC prepared with in organic-phase polymerized PEDOT.
|
|
