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Research Data to the paper Navigating Urban Futures, Arlati 2024
No full textThis dataset contains qualitative research materials collected for the cumulative PhD project, which concerns the integration of biodiversity-related thinking into urban planning and how the new concept of nature-based solutions (NbS) is influencing the creation of visions for the future. The methodology used in two of the four articles is discourse network analysis (DNA), which builds networks between actors based on the arguments they utter. The cumulative PhD project 'The (re)imagination of urban biodiversity. How nature-based solutions shape urban planning discourses, practices, and relations in Germany and Italy' is composed of four independent but connected scientific articles published in peer-reviewed journals and books. The dataset in this publication refers to the paper number 2 and contains information related to the analysis of scientific literature retrieved on Scopus.Deutsche Forschungsgesellschaft (DFG
Raum-zeitliche Dimensionen ortsflexiblen Arbeitens. Soziale und ökologische Potenziale und Risiken im Spannungsfeld von Betrieb und Wohnen.
Full text linkWelche siedlungsräumlichen und welche alltagsweltlichen Folgen haben neue ortsflexible Arbeitsverhältnisse? Und welche Konsequenzen ergeben sich für die Arbeitnehmer*innen im Hinblick auf Mobilitätsanforderungen und soziale Interaktion? Das Projekt nimmt das Zusammenspiel von sich wandelnden Arbeitsformen und dem ökologischen Umbau von Siedlungsstrukturen, Verkehr und Mobilität in den Blick.Hans-Böckler-Stiftun
Problemimmobilien in Hamburg
Full text linkDas Thema Problemimmobilien ist in den letzten Jahren zunehmend in den Fokus der Stadt- und Quartiersentwicklung gerückt. Folglich ist es notwendig eine effiziente und erfolgversprechende Strategie für den Umgang mit Problemimmobilien auf der städtischen Seite zu entwickeln. Die Arbeit analysiert Merkmalen, Auswirkungen und Ursachen von Problemimmobilien und untersucht die formellen und informellen Handlungsmöglichkeiten der hamburgischen Verwaltung hinsichtlich ihrer Eignung für den Umgang mit Problemimmobilien. Dadurch wird insbesondere die Wirkungsweise der Instrumente auf die Problemlagen untersucht.
Die Ergebnisse zeigen, dass es auf theoretischer Ebene wirkungsvolle formelle und informelle Instrumente und Maßnahmen gibt, die jedoch oft aufgrund fehlender Ressourcen nicht eingesetzt werden. Die Arbeit zeigt, dass es für den Umgang in der Praxis der Aufbau eines Informationssystems und Arbeitsstrukturen in der Verwaltung notwendig sind, um den Herausforderungen von Problemimmobilien zu begegnen.
Die Arbeit trägt dazu bei, ein besseres Verständnis für die konkreten Schwierigkeiten zu entwickeln, mit denen die FHH im Zusammenhang mit Problemimmobilien konfrontiert wird. Sie gibt auch wertvolle Einblicke in die vielfältigen Handlungsoptionen, die der Verwaltung zur Verfügung stehen.The issue of problem properties has increasingly become the focus of urban and neighborhood development in recent years. Consequently, it is necessary to develop an efficient and promising strategy for dealing with problem properties on the urban side. The thesis analyzes the characteristics, effects and causes of problem properties and examines the formal and informal options for action of the Hamburg administration with regard to their suitability for dealing with problem properties. In particular, the impact of the instruments on the problematic situations is examined.
The results show that there are effective formal and informal instruments and measures at a theoretical level, but that these are often not used due to a lack of resources. The work shows that, in practice, it is necessary to set up an information system and working structures in the administration in order to meet the challenges of problem properties.
The work helps to develop a better understanding of the specific difficulties faced by the FHH in connection with problem properties. It also provides valuable insights into the various options for action available to the administration.
Towards a socio-ecological system understanding of urban flood risk and barriers to climate change adaptation using causal loop diagrams
Full text linkWhile cities are facing increasing challenges of flood risk due to combined effects of climate change and socioeconomic development, understanding of the complexity of urban flood risk is still limited, hampering decision-making and urban adaptation planning. This study presents a qualitative system dynamics modelling framework to investigate urban flood risk and adaptation under climate change in a coupled socio-ecological system, the city of Hamburg. The developed integrated conceptual model provides a holistic understanding of key physical and socio-economic processes and the role of feedback loops underlying the urban system, and contributes to the understanding of vicious cycles of barriers that perpetuate and hinder adaptation processes within cities. The qualitative approach can help to break down silo-thinking in urban flood risk assessments. Decision-makers could use the framework to understand the complexity of interactions among multiple drivers of flood risk to overcome barriers and lock-in effects to adaptation in cities
(Auto)mobilities in Transition: Future-making and the (Re)production of Movement
Full text linkThis thesis investigates how automobility is challenged and/or reproduced through active and explicit engagements with the future (future-making) and considers the implications for transformative change in socio-technical systems. It connects with an emerging strand within transitions research, which seeks to shift the focus of research into socio-technical change away from the emergence of novelty and innovation towards existing systems and the processes and dynamics through which they destabilise, decline, and are reproduced. Building on this perspective, the research connects to discussions that foreground the future—not as a distant endpoint, but as a site where ideas about the later-than-now are actively shaped in the present. It is argued that such moments during which actors engage in future-making can offer a unique opportunity to those actors to either question (often assumed) stabilities inherited from the past or perpetuate them into the future. Next to the well-established role of the shaping of visions and expectations in processes underpinning the emergence of novelty, I argue future-making is also an important dimension of regime reproduction. To explore this dimension of socio-technical reproduction and change, the thesis focused on four different arenas of mobility future-making, where diverse ideas about what can, will, and should happen in the future are articulated, negotiated, and contested, often in under-appreciated ways. Each contribution delivers its own set of empirical, conceptual, and methodological insights, with the framework paper drawing out a number of cross-cutting themes and avenues for future research.In dieser Arbeit wird untersucht, wie Automobilität durch die aktive und explizite Gestaltung von Zukunft (sog. Future - making) sowohl in Frage gestellt als auch reproduziert wird – und welche Implikationen sich daraus für transformativen Wandel in sozio-technischen Systemen ergeben. Die Arbeit knüpft an aufkommende Diskussionen innerhalb der Transitionsforschung an, die den Fokus weg von der Entstehung von Neuheit und Innovation hin zu bestehenden Systemen und zu den Prozessen verlagern, durch welche diese destabilisiert und abgebaut – oder auch aufrechterhalten werden. Aufbauend auf dieser Perspektive greift die Forschung Diskussionen auf, welche die Zukunft nicht als fernen Endpunkt begreifen, sondern als ein Feld, in dem Vorstellungen über das Später-als-Jetzt in der Gegenwart aktiv gestaltet werden. Es wird argumentiert, dass solche Momente der Zukunftsgestaltung Akteur:innen besondere Gelegenheiten bieten, vermeintliche Stabilitäten – die oft unhinterfragt aus der Vergangenheit übernommen wurden – entweder kritisch zu hinterfragen oder in zukünftige Entwicklungspfade einzuschreiben. Neben der bekannten Rolle, die Visionen und Erwartungen in Innovationsprozessen spielen, wird hier betont, dass Zukunftsgestaltung auch eine zentrale Dimension der Reproduktion bestehender Regime darstellt. Um diese Dimension soziotechnischer Reproduktion und Veränderung zu analysieren, konzentriert sich die Arbeit auf vier unterschiedliche Arenen der Mobilitätszukunftsgestaltung. In diesen Arenen werden unterschiedliche Vorstellungen darüber, was in der Zukunft geschehen kann, wird und sollte, artikuliert, verhandelt und angefochten – oftmals auf bislang wenig beachtete Weise. Jeder Beitrag liefert dabei eigene empirische, konzeptionelle und methodische Erkenntnisse. Das Rahmenpapier bündelt diese und hebt Querschnittsthemen sowie Perspektiven für zukünftige
Forschung hervor.Deutsche Forschungsgesellschaft (DFG
Investigating the Impact of Spatiotemporal Variations in Water Surface Optical Properties on Satellite-Derived Bathymetry Estimates in the Eastern Mediterranean
Full text linkBathymetric data are crucial for benthic monitoring in coastal areas but are traditionally obtained through costly and geographically limited acoustic methods. This study uses satellite-derived bathymetry (SDB) in the Eastern Mediterranean, focusing on the Cretan Sea in Greece. It explores how variations in water surface optical properties affect SDB models over four years (2019–2022), using Sentinel-2 satellite data. The research covers two areas with contrasting features: the Chania Gulf and the open waters around Chrissi Island. Three methodologies were tested: the band-ratio method, the linear-logarithmic method, and an inherent optical properties linear model. Significant spatiotemporal variations in the SDB models were found, due to seasonal changes in water surface properties, such as temperature and suspended organic materials. Linear optical properties-based methods performed best, achieving a mean RMSE close to 1 m, slightly outperforming the ratio-based method. The logarithmic method was less effective, with RMSE values ranging from 1.3 to 1.5 m. A preliminary Kalman filter (KF) analysis increased RMSE to the decimeter level. This study demonstrates the impact of water surface optical properties on SDB models. It highlights the value of SDB for cost-effective, high-resolution coastal mapping in complex coastlines like those in Greece
Untersuchung der Verbundscherfestigkeit von Kunststoffmantelrohren nach erfolgter Knickbelastung
Full text linkIn Betrieb genommene Fernwärmeleitungen unterliegen aufgrund des durchgeleiteten Heizwassers einer Temperaturlast ∆ > 0. Diese führt entweder zu einer Längenänderung der Leitungen oder, bei behinderter Dehnung, zu axialen Spannungen im Rohr. Um die Ausdehnungen zu kompensieren und auftretende Axialkräfte innerhalb der Rohrleitung zu minimieren, werden Fernwärmesysteme im Erdreich entsprechend ausgelegt. Wird jedoch die kritische Längskraft überschritten, kann es bei Freilegung oder unzureichendem Querwiderstand zum Biegeknicken der Rohrleitung kommen.
Das am meisten eingesetzte Rohrsystem in der Fernwärme ist das Kunststoffmantelrohr (KMR), das aus einem konzentrisch in einer Polyethylen-Ummantelung (PE) eingebetteten Stahl-Mediumrohr besteht. Der Hohlraum ist mit Polyurethan-Schaum (PUR) gefüllt.
Die temperaturbedingte Längendehnung von eingebauten KMR wird teilweise durch Reibungskräfte zwischen Bodenmaterial und PE-Außenmantel, in Kombination mit dem kraftschlüssigen Verbund des PUR-Schaums zwischen Stahl-Mediumrohr und PE-Ummantelung, reduziert. Die Einhaltung der Mindestscherfestigkeit des Verbunds ist gemäß DIN EN 253 erforderlich, um die Kraftübertragung sicherzustellen.
Im Rahmen dieser Arbeit werden Proben aus Kunststoffmantelrohren entnommen, die zuvor Biegeknickbelastungen ausgesetzt wurden. Diese Querschnitte werden hinsichtlich visueller Schäden am PUR-Schaum sowie geometrischer Veränderungen untersucht. Darüber hinaus wird die Verbundscherfestigkeit spezifisch ausgewählter Proben normgerecht überprüft.
Die Untersuchungen zeigen, dass keine eindeutigen Schäden wie Risse oder Brüche im PUR-Schaum festgestellt werden konnten. Auch eine unzulässige Degradation der Verbundfestigkeit konnte durch die experimentellen Prüfverfahren nicht nachgewiesen werden. Maßliche Abweichungen belegen jedoch werksseitige Unregelmäßigkeiten und lokale Verformungen einzelner Proben infolge des Biegeknickens
Assessing participatory process-system linkages in polycentric water governance: Insights from WFD implementation in Germany
Full text linkAn important, although insufficiently answered, environmental governance research question concerns how exactly participation improves policy implementation at different scales. Numerous studies have highlighted important variables influencing the effectiveness of participatory processes. However, studies of participation tend to be strongly process-oriented rather than system-oriented and often overlook the reality that participatory processes are part of increasingly complex and broader decision-making systems. By analyzing particular process-system linkages, this paper contributes new knowledge regarding how participatory processes can influence decision-making in polycentric governance systems. This study focuses on the implementation of the EU Water Framework Directive, which aims for good ecological and chemical status in all European waters, in six German states with varied polycentric decision-making structures. No direct decision-making power was found to be associated with any of the participatory processes themselves. Rather, the power remained embedded within the other established institutional structures. Nevertheless, the participatory processes did still intend to influence decision-making within those established structures through the aggregation and multiplication of information. The findings show that only a few representatives or a small proportion of the total number of decision-makers are involved in participatory processes. Therefore, those processes may either affect decisions directly due to the binding nature of the decisions taken within participatory processes or alternatively have effects through more complex and nuanced multiplication routes following the conclusion of each participatory process. Moreover, all of the participatory processes examined in this study were reliant to some extent on such multiplication mechanisms to amplify the effects on decisions throughout the overall polycentric governance system
Research Data to the paper Mapping Conflicts Prioritization, Arlati 2024
No full textThis dataset contains qualitative research materials collected for the cumulative PhD project, which concerns the integration of biodiversity-related thinking into urban planning and how the new concept of nature-based solutions (NbS) is influencing the creation of visions for the future. The methodology used in two of the four articles is discourse network analysis (DNA), which builds networks between actors based on the arguments they utter. The cumulative PhD project 'The (re)imagination of urban biodiversity. How nature-based solutions shape urban planning discourses, practices, and relations in Germany and Italy' is composed of four independent but connected scientific articles published in peer-reviewed journals and books. The dataset in this publication refers to the paper number 3 and contains information related to the analysis of in DNA of the parliamentary protocols (codebook, dna files, and network data), the raw data of the parliamentary protocols analysed, and a chronological overview.Deutsche Forschungsgesellschaft (DFG
The state role in the housing sector in Hamburg and Havana challenges and successes of the state's claim to control in different political and planning systems
Full text linkHousing supply is a controversial topic across the globe. In Europe, for example, housing provision is fundamentally characterised by capitalist market economy. However, the intensity of state intervention differs significantly in the respective European countries. Germany is certainly one of the countries in which the state traditionally intervenes considerably in the housing market and attempts to control it through various measures. In addition, the stakeholders in the housing market are very different, and the housing market is highly segmented. In Cuba, as a rather atypical example for Latin America, where the housing market is largely liberalised, the housing market is very strongly regulated by the socialist Cuban state. In this article, we address the topics of housing supply by analysing the institutional framework conditions and the different levels of intervention in the very different systems of Germany and Cuba. In doing so, we find that the objectives at the planning and political levels in these two case studies are quite similar despite the major political and social differences. It has become clear, that there is a gap between the aspiration of the political-administrative planning system and the planning expectations of the citizens in both systems. However, it is also emphasised that the state's claim to intervene in the housing market and the regulations, production and financing conditions are very different. Using Vaus’s ‘most-different-case approach’, we emphasise for the two cities of Hamburg and Havana that although considerable successes have been achieved in both systems in terms of adequate housing provision, but major challenges still exist in both cities. The analysis has also made clear how important it is to combine housing policy demands with the realities of housing industry, real estate markets and urban planning perspectives