| 1. |
|
|
| 2. |
|
|
| 3. |
- Losacker, Sebastian, et al.
(författare)
-
Rethinking bioeconomy innovation in sustainability transitions
- 2023
-
Ingår i: Technology in Society. - 0160-791X. ; 74
-
Tidskriftsartikel (refereegranskat)abstract
- Over the past two decades, a new research field dealing with “sustainability transitions” has emerged, analyzing the transformation of socio-technical systems towards more sustainable futures. While there is consensus on the crucial role of the bioeconomy in sustainability transitions research, we argue that the true potential of many bioeconomy innovations is not yet sufficiently recognized and assessed. Much of the literature on the bioeconomy focuses on the bio-based substitution of environmentally harmful goods, neglecting the disruptive potential of innovative biotechnologies. In this commentary, we present some examples on advanced biotechnology and we invite sustainability transitions scholars to rethink their notion of bioeconomy innovations.
|
|
| 4. |
|
|
| 5. |
- Ames, Ellery, 1984, et al.
(författare)
-
On axisymmetric and stationary solutions of the self-gravitating Vlasov system
- 2016
-
Ingår i: Classical and Quantum Gravity. - : IOP Publishing. - 0264-9381 .- 1361-6382. ; 33:15
-
Tidskriftsartikel (refereegranskat)abstract
- Axisymmetric and stationary solutions are constructed to the Einstein-Vlasov and Vlasov-Poisson systems. These solutions are constructed numerically, using finite element methods and a fixed-point iteration in which the total mass is fixed at each step. A variety of axisymmetric stationary solutions are exhibited, including solutions with toroidal, disk-like, spindle-like, and composite spatial density configurations, as are solutions with non-vanishing net angular momentum. In the case of toroidal solutions, we show for the first time, solutions of the Einstein-Vlasov system which contain ergoregions.
|
|
| 6. |
- Ames, William, et al.
(författare)
-
Theoretical Evaluation of Structural Models of the S(2) State in the Oxygen Evolving Complex of Photosystem II : Protonation States and Magnetic Interactions
- 2011
-
Ingår i: Journal of the American Chemical Society. - : American Chemical Society (ACS). - 0002-7863 .- 1520-5126. ; 133:49, s. 19743-19757
-
Tidskriftsartikel (refereegranskat)abstract
- Protonation states of water ligands and oxo bridges are intimately involved in tuning the electronic structures and oxidation potentials of the oxygen evolving complex (OEC) in Photosystem II, steering the mechanistic pathway, which involves at least five redox state intermediates S(n) (n = 0-4) resulting in the oxidation of water to molecular oxygen. Although protons are practically invisible in protein crystallography, their effects on the electronic structure and magnetic properties of metal active sites can be probed using spectroscopy. With the twin purpose of aiding the interpretation of the complex electron paramagnetic resonance (EPR) spectroscopic data of the OEC and of improving the view of the cluster at the atomic level, a complete set of protonation configurations for the S(2) state of the OEC were investigated, and their distinctive effects on magnetic properties of the cluster were evaluated. The most recent X-ray structure of Photosystem II at 1.9 Å resolution was used and refined to obtain the optimum structure for the Mn(4)O(5)Ca core within the protein pocket. Employing this model, a set of 26 structures was constructed that tested various protonation scenarios of the water ligands and oxo bridges. Our results suggest that one of the two water molecules that are proposed to coordinate the outer Mn ion (Mn(A)) of the cluster is deprotonated in the S(2) state, as this leads to optimal experimental agreement, reproducing the correct ground state spin multiplicity (S = 1/2), spin expectation values, and EXAFS-derived metal-metal distances. Deprotonation of Ca(2+)-bound water molecules is strongly disfavored in the S(2) state, but dissociation of one of the two water ligands appears to be facile. The computed isotropic hyperfine couplings presented here allow distinctions between models to be made and call into question the assumption that the largest coupling is always attributable to Mn(III). The present results impose limits for the total charge and the proton configuration of the OEC in the S(2) state, with implications for the cascade of events in the Kok cycle and for the water splitting mechanism.
|
|
| 7. |
|
|
| 8. |
- Chen, Danfang, et al.
(författare)
-
A state-of-the-art review and evaluation of tools for factory sustainability assessment
- 2013
-
Ingår i: 2nd CIRP Global Web Conference - Beyond modern manufacturing. - : Elsevier BV. ; , s. 85-90
-
Konferensbidrag (refereegranskat)abstract
- The type of tools for sustainability assessment is manifold and is growing consistently to meet more and more of society's needs. This paper presents a review and evaluation study of existing assessment tools collected from a variety of sources. The aim is to clarify the difference between those sustainability assessments tools and increase factory planner's awareness towards the different tool properties. In this work representative assessment tools are evaluated and described with respect to their specific focus and benefits as well as drawbacks. Based on that a research gap is identified and further research directions can be derived. (C) 2013 The Authors. Published by Elsevier B.V. Selection and peer-review under responsibility of International Scientific Committee of the 2nd CIRP Global Web Conference in the person of the Conference Chair Dr. Sotiris Makris
|
|
| 9. |
|
|
| 10. |
- Enright, Jessica, et al.
(författare)
-
Assigning times to minimise reachability in temporal graphs
- 2021
-
Ingår i: Journal of computer and system sciences (Print). - : Elsevier. - 0022-0000 .- 1090-2724. ; 115, s. 169-186
-
Tidskriftsartikel (refereegranskat)abstract
- Temporal graphs (in which edges are active at specified times) are of particular relevance for spreading processes on graphs, e.g. the spread of disease or dissemination of information. Motivated by real-world applications, modification of static graphs to control this spread has proven a rich topic for previous research. Here, we introduce a new type of modification for temporal graphs: the number of active times for each edge is fixed, but we can change the relative order in which (sets of) edges are active. We investigate the problem of determining an ordering of edges that minimises the maximum number of vertices reachable from any single starting vertex; epidemiologically, this corresponds to the worst-case number of vertices infected in a single disease outbreak. We study two versions of this problem, both of which we show to be NP-hard, and identify cases in which the problem can be solved or approximated efficiently.
|
|
