| 1. |
- Kehoe, Laura, et al.
(författare)
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Make EU trade with Brazil sustainable
- 2019
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Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 364:6438, s. 341-
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 2. |
- Fornara, Andrea, et al.
(författare)
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Tailored Magnetic Nanoparticles for Direct and Sensitive Detection of Biomolecules in Biological Samples
- 2008
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Ingår i: Nano letters (Print). - : American Chemical Society (ACS). - 1530-6984 .- 1530-6992. ; 8:10, s. 3423-3428
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Tidskriftsartikel (refereegranskat)abstract
- We developed nanoparticles with tailored magnetic properties for sensitive detection of biomolecules directly in biological samples in a single step. Thermally blocked nanoparticles obtained by thermal hydrolysis are mixed with sample solutions and the variation of the magnetic relaxation due to surface binding is used to detect the presence of biomolecules. The binding events significantly increase the hydrodynamic volume of nanoparticles, thus changing their Brownian relaxation frequency which is measured by a specifically developed AC-susceptometer.The system was tested for the presence of Brucella antibodies in serum samples from infected cows and the surface of the nanoparticles was functionalized with lipopolysaccarides (LPS) from Brucella abortus. The hydrodynamic volume of functionalized particles increased by 25-35% as a result of the binding of the antibodies, as measured by changes in the susceptibility in an alternating magnetic field. The method has shown high sensitivity, with detection limit of 7 nmol·L-1 in serum without any pre-treatment of the biological samples.The detection method is very sensitive, cost-efficient and versatile, giving a direct indication if the animal is infected or not, making it suitable for point-of care applications. The functionalization of tailored magnetic nanoparticles can be modified to suit numerous homogenous assays for a wide range of applications.
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| 3. |
- Gustavsson, Johan, 1974, et al.
(författare)
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High-speed 850-nm VCSELs for 40 Gb/s transmission
- 2010
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- We have explored the possibility to extend the data transmission rate for standard 850-nm GaAs-based VCSELs beyond the 10 Gbit/s limit of today's commercially available directly-modulated devices. By sophisticated tailoring of the design for high-speed performance we demonstrate that 10 Gb/s is far from the upper limit. For example, the thermal conductivity of the bottom mirror is improved by the use of binary compounds, and the electrical parasitics are kept at a minimum by incorporating a large diameter double layered oxide aperture in the design. We also show that the intrinsic high speed performance is significantly improved by replacing the traditional GaAs QWs with strained InGaAs QWs in the active region. The best overall performance is achieved for a device with a 9 μm diameter oxide aperture, having in a threshold current of 0.6 mA, a maximum output power of 9 mW, a thermal resistance of 1.9 °C/mW, and a differential resistance of 80 Ω. The measured 3dB bandwidth exceeds 20 GHz, and we experimentally demonstrate that the device is capable of error-free transmission (BER
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| 4. |
- Johansson, Lars-Olof, 1957, et al.
(författare)
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Weighing third-party fairness, efficiency, and self-interest in resource allocation decisions
- 2007
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Ingår i: Journal of Economic Psychology. ; , s. 53-68
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Tidskriftsartikel (refereegranskat)abstract
- In two experiments participants allocated a resource between themselves, one privileged, and one unprivileged group. Conflicts were induced between “third party fairness” (difference in payoff to the two groups) and efficient resource use. Experiment 1 employed 42 undergraduates making multi-stage allocation decisions. Fairness was varied at three levels and self-interest, operationalized as the political motive of win votes, at two levels. Adverse effects of fairness on preserving the resource were found. In Experiment 2 another 48 undergraduates performed a similar task. Self-interest was now operationalized as a financial motive. The results showed that participants reduced their resource use when neither fairness nor self-interest was salient. A regression analysis demonstrated consistent adverse effects of fairness on resource use controlling for efficient resource use and total group payoff. It was concluded that fairness causes decision makers to overuse resources, although they are unwilling to totally deplete a resource and will make compromises.
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| 5. |
- Olsson, Lars E., 1971, et al.
(författare)
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Examining the Use of Subsidies for the Abatement of Greenhouse Gas Emissions through Experimental Simulations
- 2006
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Ingår i: European Environment. ; , s. 184-197
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Tidskriftsartikel (refereegranskat)abstract
- A market experiment was designed to empirically investigate the potential effectiveness of a governmental subsidy system to reduce sales and therefore production of environmentally harmful products. The important issue of whether the subsidy system preserves competitiveness was also examined. In the experiment two levels of a subsidy for unsold units were compared with no subsidy. To simulate the way in which subsidy levels may vary across time in real markets, the effects of high and low uncertainty regarding the subsidy level were also investigated. The results showed that subsidies, whether known and fixed or uncertain and varying, did not erode competition but nevertheless led to higher prices, which resulted in fewer sales. In the control condition a price war resulting in decreasing prices and increasing sales were observed. Several ways in which the proposed subsidy system may be implemented in the transport sector and other sectors are discussed. It is suggested that subsidies may make the adjustment process toward sustainable production less costly for the regulated parties.
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| 6. |
- Olsson, Lars E., 1971, et al.
(författare)
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Experimental simulations of a subsidy system for sustainable production
- 2005
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- A multi-trial duopoly price-setting experiment was conducted to investigate the potential effectiveness of a governmental subsidy system aimed to reduce sales and therefore production of environmentally harmful products. Two levels of a subsidy for unsold units were compared with a control condition without a sub-sidy. The results showed that the subsidies did not erode competition but never-theless led to the setting of higher prices that resulted in fewer sales. In the con-trol condition a price-war led to decreasing prices and increasing sales. The ways in which the proposed subsidy system may be implemented in the transport sec-tor and other sectors are discussed. Specifically, it is proposed that the subsidy system may complement the newly introduced European Emission Trading Scheme.
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| 7. |
- Olsson, Lars E., 1971, et al.
(författare)
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Experimental tests of system of governmental subsidies for sustainable production.
- 2005
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Ingår i: Paper presented at the 7th Nordic Environmental Social Science (NESS) research conference, Göteborg University, Sweden.
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Konferensbidrag (refereegranskat)abstract
- A multi-trial duopoly price-setting game was used to investigate the potential ef-fectiveness of a governmental subsidy system to reduce sales and therefore pro-duction of environmentally harmful products. Two levels of a subsidy for unsold units were compared with a control condition without a subsidy. The results showed that the subsidies did not prevent competition but nevertheless led to the setting of higher prices that resulted in fewer sales. In the control condition a price war led to decreasing prices and increasing sales. The ways in which the proposed subsidy system may be implemented in the transport sector and other sectors are discussed. Specifically, it is proposed that the subsidy system may complement the newly introduced European Emission Trading Scheme
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| 8. |
- Olsson, Lars E., 1971, et al.
(författare)
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Subsidies for sustainable production: Effects of changing subsidy level
- 2005
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- A multi-trial duopoly price-setting game was used to investigate the potential ef-fectiveness of a subsidy system aimed at reducing sales and thereby production of environmentally harmful products. In real life it is however likely that a subsidy level will never remain fixed, either nominally or in real value. Producers may also have unreliable perceptions of the subsidy level even if it does not change. Therefore, a subsidy, either fixed and known, varying randomly, or varying sys-tematically across trials, was investigated. The results showed that both fixed and known, as well as varying subsidy levels led to higher prices and thus re-duced sales compared to without a subsidy. Knowledge of a fixed subsidy level or expectations about a subsidy level based on previous trials, appeared to make participants refrain from setting lower prices than the subsidy level. Further-more, the results indicated that participants attempted to maximize their profit by selling to the lowest price, thus they stayed competitive and did not exploit the subsidy.
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| 9. |
- Olsson, Lars E., 1971, et al.
(författare)
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The dyadic subsidy game: Effects of uncertain and changing subsidies on price setting
- 2004
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Ingår i: Poster presented at the 28th international congress of psychology, Beijing, China..
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- In order to reduce sales (production) of environmentally harmful products we investigate the effects of subsidies that compensate producers for what they do not sell. A repeated duopoly price-setting game with imperfect price competition was devised. The results show that higher subsidies led to reduced sales and, as a consequence, higher price, and that uncertainty regarding the size of the subsidy did not change this. Furthermore, competition was not eroded by introducing the subsidy. The results also indicate that the theoretical framework of dyadic price negotiation is applicable to the dyadic subsidy game. We conclude that such a subsidy system may be used as a regulating mechanism in order to reduce sales (and thereby production) of environmentally harmful products or as a tool to restrain the overharvesting of finite resources
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| 10. |
- Strannegård, Claes, 1962, et al.
(författare)
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Ecosystem Models Based on Artificial Intelligence
- 2022
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Ingår i: 34th Workshop of the Swedish Artificial Intelligence Society, SAIS 2022. - : IEEE.
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Konferensbidrag (refereegranskat)abstract
- Ecosystem models can be used for understanding general phenomena of evolution, ecology, and ethology. They can also be used for analyzing and predicting the ecological consequences of human activities on specific ecosystems, e.g., the effects of agriculture, forestry, construction, hunting, and fishing. We argue that powerful ecosystem models need to include reasonable models of the physical environment and of animal behavior. We also argue that several well-known ecosystem models are unsatisfactory in this regard. Then we present the open-source ecosystem simulator Ecotwin, which is built on top of the game engine Unity. To model a specific ecosystem in Ecotwin, we first generate a 3D Unity model of the physical environment, based on topographic or bathymetric data. Then we insert digital 3D models of the organisms of interest into the environment model. Each organism is equipped with a genome and capable of sexual or asexual reproduction. An organism dies if it runs out of some vital resource or reaches its maximum age. The animal models are equipped with behavioral models that include sensors, actions, reward signals, and mechanisms of learning and decision-making. Finally, we illustrate how Ecotwin works by building and running one terrestrial and one marine ecosystem model.
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