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Changing our unsustainable linear water management pattern is necessary to face growing global water challenges. This article proposes an integrated framework to analyse and understand the role of different contextual conditions in the possible transition towards water circularity. Our framework combines a systematic multi-level perspective to explore the water system and the institutional work theory for technology legitimation. The framework consists of the following stages: (1) describing and understanding the water context, (2) assessment of the selected technologies’ circularity level, (3) assessment of the alternative circular technologies’ legitimacy, and (4) identification of the legitimation actions to support the upscale of alternative circular technologies. The practical applicability of the integrated assessment framework and its four assessment stages was demonstrated in the exploration of circular water technologies for the horticulture sector in Westland, the Netherlands. The results revealed the conditions that hinder or enable the legitimation of the circular water technologies, such as political environmentalism, trust in water governing authorities, and technical, financial, and knowledge capabilities.
Surrogate-based optimization, nature-inspired metaheuristics, and hybrid combinations have become state of the art in algorithm design for solving real-world optimization problems. Still, it is difficult for practitioners to get an overview that explains their advantages in comparison to a large number of available methods in the scope of optimization. Available taxonomies lack the embedding of current approaches in the larger context of this broad field. This article presents a taxonomy of the field, which explores and matches algorithm strategies by extracting similarities and differences in their search strategies. A particular focus lies on algorithms using surrogates, nature-inspired designs, and those created by automatic algorithm generation. The extracted features of algorithms, their main concepts, and search operators, allow us to create a set of classification indicators to distinguish between a small number of classes. The features allow a deeper understanding of components of the search strategies and further indicate the close connections between the different algorithm designs. We present intuitive analogies to explain the basic principles of the search algorithms, particularly useful for novices in this research field. Furthermore, this taxonomy allows recommendations for the applicability of the corresponding algorithms.
Reducing the carbon emissions from hotels on non-interconnected islands (NII) is essential in the context of a low carbon future for the Mediterranean region. Maritime tourism is the major source of income for Greece and many other countries in the region, as well as hot-temperate and tropical regions worldwide. Like many NIIs, Rhodes attracts a high influx of tourists every summer, doubling the island’s energy demand and, given the high proportion of fossil fuels in the Rhodian energy supply, increasing carbon emissions. Using the theoretical framework ‘FINE’, this paper presents the optimisation of a medium-sized hotel’s energy system with the aim of reducing both cost and carbon emissions. By introducing a Photovoltaic (PV) net metering system, it was found that the carbon emissions associated with an NII hotel’s energy system could be reduced by 31% at an optimised cost. It is suggested that large-scale deployment of PV or alternative renewable energy sources (RES) in NII hotels could significantly reduce carbon emissions associated with the accommodation sector in Greece and help mitigate climate change.
3d printing is capable of providing dose individualization for pediatric medicines and translating the precision medicine approach into practical application. In pediatrics, dose individualization and preparation of small dosage forms is a requirement for successful therapy, which is frequently not possible due to the lack of suitable dosage forms. For precision medicine, individual characteristics of patients are considered for the selection of the best possible API in the most suitable dose with the most effective release profile to improve therapeutic outcome. 3d printing is inherently suitable for manufacturing of individualized medicines with varying dosages, sizes, release profiles and drug combinations in small batch sizes, which cannot be manufactured with traditional technologies. However, understanding of critical quality attributes and process parameters still needs to be significantly improved for this new technology. To ensure health and safety of patients, cleaning and process validation needs to be established. Additionally, adequate analytical methods for the in-process control of intermediates, regarding their printability as well as control of the final 3d printed tablets considering any risk of this new technology will be required. The PolyPrint consortium is actively working on developing novel polymers for fused deposition modeling (FDM) 3d printing, filament formulation and manufacturing development as well as optimization of the printing process, and the design of a GMP-capable FDM 3d printer. In this manuscript, the consortium shares its views on quality aspects and measures for 3d printing from drug-loaded filaments, including formulation development, the printing process, and the printed dosage forms. Additionally, engineering approaches for quality assurance during the printing process and for the final dosage form will be presented together with considerations for a GMP-capable printer design.
This is the fifth time that TH Köln has conducted this study to examine the local XR industry´on behalf of Mediencluster NRW GmbH, a subsidiary of Film- und Medienstiftung NRW. Aside from the two surveys on the North Rhine-Westphalian sector, there have now been three studies on the nationwide XR (extended or cross reality) sector in Germany. By this we mean all companies that create products and services in the field of virtual, mixed or augmented reality (but not firms that employ XR as users).
Decisions on irrigation water management are usually made at different levels, including farms, water user associations (WUAs), and regional water planning agencies. The latter generally have good access to information and decision tools regarding water resources management. However, these remain out of reach to the final water users, namely the farmers. The study, conducted in the irrigated district of Cherfech, north Tunisia, had the main objective of investigating farmer’s perceptions of, and acceptance for, the use of an irrigation advisory service (IAS) to be implemented by their WUA. The suggested IAS provides the following information: (1) reference evapotranspiration (ETo) and rainfall; (2) crop water requirement (CWR) of the most cultivated crops; (3) irrigation water requirement (IWR) of the farmer’s crop; and (4) crop monitoring and real-time estimation of IWR of crops settled, using soil moisture sensors. Such services and information would be available at the WUA level and provided in a timely manner to farmers for more effective decision making at the plot level. Prior to the acceptance study, we launched a technical study to determine the required tools and equipment required for the implementation of the IAS, followed by a farmer survey to assess their respective perceptions and acceptance towards this IAS. Results showed that only 54% of the farmers are satisfied by WUAs work, but that 77% of them accepted using the suggested IAS. Farmers are also willing to pay for most of the IAS packages suggested. The financial profitability of investing in the IAS at the WUA level shows the venture is financially viable, with a benefit cost ratio (BCR) of 1.018. The project will be even more profitable if we add the social benefits, which may result in water savings at the WUA level.
The importance of lithium as a raw material is steadily increasing, especially in the growing markets of grid energy and e-mobility. Today, brines are the most important lithium sources. The rising lithium demand raises concerns over the expandability and the environmental impact of common mining techniques, which are mainly based on the evaporation of brine solutions (Salars) in arid and semiarid areas. In this case, much of the water contained in the brine is lost. Purification processes lead to further water losses of the ecosystems. This calls for new and improved processes for lithium production; one of them is electrodialysis (ED). Electrodialysis offers great potential in accessing lithium from brines in a more environmentally friendly way; furthermore, for the recovery of lithium from spent lithium-ion batteries (LIB), electrodialysis may become a vital technology. The following study focused on investigating the effect of varying brine compositions, different ED operation modes, and limiting factors on the use of ED for concentrating lithium-containing brine solutions. Synthetic lithium salt solutions (LiCl, LiOH) were concentrated using conventional ED in batch-wise operation. While the diluate solution was exchanged once a defined minimum concentration was reached, the concentrate solution was concentrated to the respective maximum. The experiments were conducted using a lab-scale ED-plant (BED1-3 from PCCell GmbH, Germany). The ion-exchange membranes used were PCSK and PCSA. The treated solutions varied in concentration and composition. Parameters such as current density, current efficiency, and energy requirements were evaluated. ED proved highly effective in the concentration of lithium salt solutions. Lithium chloride solutions were concentrated up to approximately 18-fold of the initial concentration. Current efficiencies and current densities depended on voltage, concentration, and the composition of the brine. Overall, the current efficiencies reached maximum values of around 70%. Furthermore, the experiments revealed a water transport of about 0.05 to 0.075% per gram of LiCl transferred from the diluate solution to the concentrate solution.
Am Beispiel von Naturkatastrophen (NatKat) Rückversicherung lässt sich erkennen, dass wesentliche Elemente klassischer Rückversiche¬rungs-transaktionen darauf abzielen, Informationsprobleme zwischen Erst- und Rückversicherer zu reduzieren. Aktuell gibt es in der Rückversicherungs¬literatur keinerlei Hinweise auf ein Verständnis darüber, wie sich der klassische Transaktionsprozess auf Ergebnisse auswirkt, noch darauf wie sich Auktionen in ihrer Wirkung unterscheiden / wie sich diese auf Ergebnisse auswirken. Ein wichtiges Ziel ist somit die Grundlagenschaffung für die zukünftige Entwicklung einer Marktdesign Diskussion im Rückversicherungskontext.
Anhand bestehender Erkenntnisse in der Auktionstheorie ist nicht eindeutig, ob und in welchen Fällen Einheitspreise oder individuelle Preise zu besseren Ergebnissen für die Verkäufer (Versicherer) führen würden. Weiterhin ist nicht klar, ob öffentliche Auktionen oder verdeckte Auktionen bessere Ergebnisse liefern würden.
Ein Auktionsdesign, das der klassischen Brokerplatzierung nahekommt, ist die Ausubel Auktion (Ausubel, 2004). Dennoch lassen sich keine generellen Aussagen darüber treffen, ob die klassische Platzierung oder Auktionen bessere Allokations¬mechanismen darstellen (vgl. Bulow and Klemperer 1996).
Unter Berücksichtigung von klimatischen und sozioökonomischen Trends ist ein besseres Verständnis der beschriebenen Zusammenhänge für die Stärkung des Rückversicherungsmarktes zunehmend dringend.
Folgende Aspekte lassen sich im Rahmen dieser Forschung festhalten:
• Im ORSA Bericht 2022 dient eine Anlehnung an die Klimawandelszenarien des „Network for Greening the Financial System (NGFS)“ (ein Zusammenschluss der Aufsichtsbehörden und Zentralbanken) als erste Orientierung.
• In Anlehnung an das NGFS sind zwei langfristige (mind. 30 Jahre) Temperaturanstiegsszenarien (< 2°C und ≥ 2°C) zur weiteren Analyse auszuwählen.
• Hierfür bietet sich ein Szenario mit hohem Transitionsrisiko (z.B. „Delayed Transition“) und ein Szenario mit hohem physischen Risiko (z.B. „Current Policies“) an.
• Im ORSA 2022 dienen einfach gehaltene, quantitative Analysen als Basis, um daraus qualitative Aussagen abzuleiten, z.B.:
o Neubewertung per heute (Sensitivitätsanalyse)
o Stresstest mit instantanen Schocks („Zeitreise“)
o Projektion (statisch oder mit Managementregeln)
• Schließlich sind bei der Ableitung von Ergebnissen die Besonderheiten der verschiedenen Bereiche/Sparten zu berücksichtigen:
o die Kapitalanlagen könnten beispielsweise langfristig durch Transitionsrisiken geprägt sein (z.B. steigende Energiepreise)
o die Schaden/Unfallversicherung ist geprägt durch das reformierte Baurecht (klimabewusstes Bauen)
o die Personenversicherung ist geprägt durch lange Vertragslaufzeiten.
Das Thema Environmental Social Governance (ESG) gewinnt auch im Rückversicherungssektor aufgrund gestiegener aufsichtsrechtlicher Anforderungen an Relevanz. Dabei wurde in der Vergangenheit der Schwerpunkt auf Investments gelegt. Nun existieren immer mehr ESG-Kriterien, die das Underwriting betreffen. Welche Effekte dies auf die Branche hat, lässt sich heute noch nicht abschätzen. Klar ist, dass wir uns am Anfang einer langen Transformation befinden. ESG-Kriterien werden zukünftig vermutlich als ein weiterer Aspekt neben der versicherungstechnischen Risikobewertung berücksichtigt