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Differential growth is central to eukaryotic morphogenesis. We showed using cellular imaging, simulations, and perturbations that light-induced differential growth in a curved organ, the Arabidopsis thaliana apical hook, emerges from the longitudinal expansion of subepidermal cells, acting in parallel with a differential in the material properties of epidermal cell walls that resist expansion. The
With the amendment to the German Climate Change Act in 2021, the Federal Government of Germany has set the target to become greenhouse gas neutral by 2045. Reaching this ambitious target requires multisectoral efforts, which in turn calls for interdisciplinary collaboration: the Net-Zero-2050 project of the Helmholtz Climate Initiative serves as an example of successful, interdisciplinary collabor
Feedback loops are among the core notions in systems thinking – and the various fields of theory and practice that draw on it, including systemic design. We use these notions to develop methodological approaches, conceptualise processes, assess the adequacy of solutions, and anticipate how the design object may interact with its immediate surroundings and beyond. In my presentation, I discuss the
At a geological time-scale, seas rise aloft and mountains crumble. We are currently in the middle of a debate on whether—in order to acknowledge the pervasive and geologically significant traces of human action on the planet—our present era should be labelled the “Anthropocene”, and if so, what would be the cut-off date for the commencement of that era. At the same moment, we are already contempla
Ecosystem functioning depends on biodiversity at multiple trophic levels, yet relationships between multitrophic diversity and ecosystem multifunctionality have been poorly explored, with studies often focusing on individual trophic levels and functions and on specific ecosystem types. Here, we show that plant diversity can affect ecosystem functioning both directly and by affecting other trophic
Food systems have enormous impacts on people and the planet, with agriculture and food research becoming strategic for many countries. However, the way this research is conducted and the rise of new agri-food technologies have ethical and socio-economic implications. To address these, many scholars are gaining interest in participatory methods, such as citizen science, but are unfamiliar with the
As global food systems are currently presenting great challenges to our environment and our health, diverse new (sustainable) foods and possibilities to integrate these into consumers’ everyday diets are extensively studied. Due to industrialized, standardized food production, approaches from disciplines such as sensory science and consumer psychology play an important role in new product developm
Microtubules are dynamic intracellular fibers that have been observed experimentally to undergo spontaneous self-alignment. We formulate a three-dimensional (3D) mean-field theory model to analyze the nematic phase transition of microtubules growing and interacting within a 3D space, then make a comparison with computational simulations. We identify a control parameter Geff and predict a unique cr
Grassroots initiatives (GIs) are local, yet globally connected networks of activists that generate novel solutions for sustainability. While GIs are often claimed to play an important role for urban sustainability transitions, little research has examined how such innovations consolidate beyond isolated local initiatives. This article summarizes findings from a case study of the collaborative econ
Uncertainty analysis should be an integral part of conducting a scientific investigation of the damaging human health effects of exposure to chemicals. Sources of uncertainty related to limitations in knowledge are present in all steps of a such risk assessment, i.e. the hazard identification, hazard characterization and exposure assessment. The purpose of uncertainty analysis is to evaluate the c
The articles included in this thesis centre on what can be called the normative basis of risk analysis. Since risk analyses are decision procedures, they should adhere to norms of rational decision-making, and this they do. Most risk analysis schemes are built on a notion of the decision theoretic maxim that the goal of every decision is to maximize expected utility. However, for some thirty years
Denna uppsats belyser problematiken med överprövningar som föranleder upphandlande myndigheter att frångå det obligatoriska annonseringskravet genom att direktupphandla samhällsåtaganden på grund av synnerlig brådska. Att en upphandlande myndighet blivit tvungen att direktupphandla ett samhällsåtagande, i syfte att utföra en obligatorisk skyldighet, för att det uppstått brådska på grund av överpröThis thesis highlights the problem of review procedures that lead contracting authorities to waive the mandatory publication of a contract notice by directly procuring public commitments due to extreme urgency. The fact that a contracting authority has been forced to directly procure a public commitment, in order to perform a mandatory duty, in the event of urgency due to a review procedure will n
Previous studies have shown a correlation between nature connection and pro environmental behavior. Simultaneously, urbanisation amongst other causes has led to decreased human contact with nature. However, local outdoor recreation is considered an option for spending time in nature despite living in urban areas. Drawing from the above, there are reasons to study whether local outdoor recreation c
This study shows that several beneficial aspects of climate adaptation in Swedish municipalities can be linked to the United Nations’ sustainable development goals. In doing so, the study also exhibits that the sustainable development goals could serve as a good tool to aid in maximizing social, environmental and economic benefits when planning and executing climate adaptation measures. A claim th
Local acceptance is key when implementing climate technologies. One necessary technology to mitigate climate change is land-based Carbon Capture and Storage (CCS). In Denmark, earlier experience with the technology ended in shutdown due to local resistance. But now CCS plays a significant role in the Danish climate reduction goals; without CCS the goal won't be met. The academic field is very
Increased average temperatures, rising sea levels and heat waves are some examples of the consequences of climate change. Cities are particularly vulnerable to climate-related events due to their structure and lack of green and blue spaces causing negative impacts on both the environment and public health. Children are one of the most sensitive groups to heat waves and they spend plenty of time in
Pollutant emissions to the environment caused by human activity is a worldwide problem. This can occur due to residential fires which are often connected to loss of human lifes and belongings, as well as environmental damage. Residential fires canlead to emissions of pollutants that can be released to the air, water and soil. In this study, the level of soil contamination caused by residential fi
With climate change resulting from a history of uncontrolled greenhouse gas emissions, all parts of society now need to take action - maybe most importantly the private sector. Since 2015 the Science Based Targets (SBT) initiative has committed over 5000 companies worldwide to heavily reduce their total emissions at a pace that scientists deem necessary for average global temperature rise to stay
Den globala uppvärmningen gör sig ständigt påmind genom extremväder och naturkatastrofer. Vid klimatkonferensen COP21 år 2015 undertecknade i stort sett alla världens länder Parisavtalet med målet att temperaturökningen ska begränsas. För att uppnå Parisavtalets mål ligger en stor del i att länder behöver minska sina utsläpp av växthusgaser. Sverige har minskat sina utsläpp med 35 procent sedan 19Global warming is constantly reminding us of its presence through extreme weather and natural disasters. At the COP21 climate conference in 2015, almost every country in the world signed the Paris Agreement with the aim of limiting temperature increase. The countries need to reduce their greenhouse gas emissions to achieve this. Since 1990, Sweden has reduced its emissions by 35 percent, and in 20
