333 Boden- und Energiewirtschaft
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- Litho-Jet method (2)
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Das Peren-Theorem
(2018)
Der Artikel beschäftigt sich mit der Analyse des Wassersektors in Sub-Sahara Afrika. Der Schwerpunkt der Arbeit bildet eine länderübergreifende und -vergleichende Analyse der Tarifstruktur, der Subventionspraxis und der Kostendeckungsbeiträge der Wasserversorgungsbetriebe in dieser Region. Die Kosten wie auch die Tarife sind im globalen Vergleich außerordentlich hoch und genügen nur unzureichend ökonomischen und sozialen Leistungsindikatoren. Der afrikanische Kontinent weist einerseits extreme Schwankungen der Wasserverfügbarkeit verbunden mit unzureichenden Wasserspeicher-Kapazitäten, Infrastrukturnetzen und Wasseranschlüssen sowie eine sehr dünne Besiedlungsdichte auf, so dass die durchschnittlichen Kosten der Wasserversorgung sehr hoch sind. Andererseits sind hohe technische und ökonomische Ineffizienzen, einhergehend mit einer nicht zielgenauen Subventionspraxis der Wasserversorgungsbetriebe zu verzeichnen. Zusätzliche Infrastrukturinvestitionen sowie ein effizientes integriertes Wasser-Ressourcen-Management sind notwendig, um hier Abhilfe zu schaffen und eine nachhaltige Wasserversorgung zu gewährleisten.
Die Dritte Welt in der fossilen Ressourcenfalle – Ressourcenabhängigkeit trotz Ressourcenreichtum
(2010)
Die Städte der Dritten Welt orientierten sich in der nachkolonialen Ära wie selbstverständlich am Vorbild der industriegesellschaftlichen Entwicklung und damit an deren energieintensivem Wachstumsmodell. Dadurch wurden und werden sie unvermittelt und ohne Zeit zur Anpassung einer Wachstumsflut ausgesetzt. Ein beispielloser Zuzug überschwemmt die Städte der Dritten Welt und überfordert in kürzester Zeit ihre Infrastruktur.
Smart home systems change the way we experience the home. While there are established research fields within HCI for visualizing specific use cases of a smart home, studies targeting user demands on visualizations spanning across multiple use cases are rare. Especially, individual data-related demands pose a challenge for usable visualizations. To investigate potentials of an end-user development (EUD) approach for flexibly supporting such demands, we developed a smart home system featuring both pre-defined visualizations and a visualization creation tool. To evaluate our concept, we installed our prototype in 12 households as part of a Living Lab study. Results are based on three interview studies, a design workshop and system log data. We identified eight overarching interests in home data and show how participants used pre-defined visualizations to get an overview and the creation tool to not only address specific use cases but also to answer questions by creating temporary visualizations.
Residential and commercial buildings are responsible for about 40% of the EU’s total energy consumption. However, conscious, sustainable use of this limited resource is hampered by a lack of visibility and materiality of consumption. One of the major challenges is enabling consumers to make informed decisions about energy consumption, thereby supporting the shift to sustainable actions. With the use of Energy-Management-Systems it is possible to save up to 15%. In recent years, design approaches have greatly diversified, but with the emergence of ubiquitous- and context-aware computing, energy feedback solutions can be enriched with additional context information. In this study, we present the concept “room as a context” for eco-feedback systems. We investigate opportunities of making current state-of-the-art energy visualizations more meaningful and demonstrate which new forms of visualizations can be created with this additional information. Furthermore, we developed a prototype for android-based tablets, which includes some of the presented features to study our design concepts in the wild.
When developing new ICT systems and applications for domestic environments, rich qualitative approaches improve the understanding of the user's integral usage of technology in their daily routines and thereby inform design. This knowledge will often be reached through in-home studies, strong relationships with the users and their involvement in the design and evaluation process. However, whilst this kind of research offers valuable context insights and brings out unexpected findings, it also presents methodological, technical and organizational challenges for the study design and its underlying cooperation processes. In particular, due to heterogeneous users in households in terms of technology affinity, individual needs, age distribution, gender, social constellations, personal role assignment, project expectations, etc. it produces particular demands to collaborate with users in the design process and thereby exposes a range of practical challenges. The full-day workshop wishes to identify these practical challenges, discuss best practice and develop a roadmap for sustainable relationships for design with users.
In Software development, the always beta principle is used to successfully develop innovation based on early and continuous user feedback. In this paper we discuss how this principle could be adapted to the special needs of designing for the Smart Home, where we do not just take care of the software, but also release hardware components. In particular, because of the 'materiality' of the Smart Home one could not just make a beta version available on the web, but an essential part of the development process is also to visit the 'beta' users in their home, to build trust, to face the real world issues and provide assistance to make the Smart Home work for them. After presenting our case study, we will then discuss the challenges we faced and how we dealt with them.
The smart home of the future is typically researched in lab settings or apartments that have been built from scratch. However, comparing the lifecycle of buildings and information technology, it is evident that modernization strategies and technologies are needed to empower residents to modify and extend their homes to make it smarter. In this paper, we describe a case study about the deployment, adaption to and adoption of tailorable home energy management systems in 7 private households. Based on this experience, we want to discuss how hardware and software technologies should be designed so that people could build their own smart home with a high usability and user experience.
Currently, there is a global problem of an increasing need of energy. There will be less fossil fuel, which will be more expensive in the future. The regenerative energies are becoming more and more important. The subject deals the problem of economical feasibility of geothermal energy systems. Its goal is to analyze necesary conditions and aspects of realizing geothermal energy systems in comparison to and competition with traditional energy sources. The geothermal energy recovery is economically advantageous if the investment costs, esp. the drilling costs, could be reduced significantly. It only seems possible to open up a big opportunity for realizing geothermal energy systems by using a rock melt drilling technology, to reduce the investment costs significantly.
Der Weltklimavertrag versucht, sowohl auf das Umsteuern bei klimaschädlichem Wirtschaften in den Industrieländern (und einigen Schwellenländern) als auch auf das Vermeiden von klimaschädlicher Ausgestaltung des Wirtschaftens in den Schwellen- und Entwicklungsländern eine Antwort zu geben. Doch noch ist diese Antwort zu abstrakt.
Nachhaltigkeit aus institutionenökonomischer Perspektive am Beispiel der Schiefergasförderung
(2014)
Introduction: Some Basic Remarks on Sustainable Forest Management, Environment and Global Ethics
(2010)
The small and remote households in Northern regions demand thermal energy rather than electricity. Wind turbine in such places can be used to convert wind energy into thermal energy directly using a heat generator based on the principle of the Joule machine. The heat generator driven by a wind turbine can reduce the cost of energy for heating system. However the optimal performance of the system depends on the torque-speed characteristics of the wind turbine and the heat generator. To achieve maximum efficiency of operation both characteristics should be matched. In the article the condition of optimal performance is developed and an example of the system operating at maximum efficiency is simulated.
Windkraft Offshore
(2010)
Nach jetzigen Projektionen wird Afrika als einziger Kontinent das UN-Milleniumsziel einer ausreichenden Wasserversorgung nicht erreichen. Notwendig ist eine umfangreiche Analyse des Wasser-Sektors der afrikanischen Staaten, um Ursachen zu ermitteln und entsprechende Handlungsempfehlungen abzuleiten. Im Mittelpunkt der vorliegenden Untersuchung steht eine länderübergreifende und -vergleichende Analyse der Kosten, Tarifstrukturen und der Subventionspraxis der Wasserversorgungsbetriebe in Sub-Sahara Afrika. Dazu wird ein entsprechendes Bewertungs- und Benchmarkingsystem aufgestellt, das anhand ökonomischer Leistungsprinzipien und -indikatoren eine unternehmensund sektorspezifische Analyse ermöglicht und darüber hinaus die Voraussetzungen für einen internationalen Vergleich schafft.
Das Litho-Jet-Bohrverfahren
(2009)
Mit zunehmender Knappheit fossiler Brennstoffe und sich zeitigender Akzeptanzprobleme nuklearer Energie gewinnen regenerative Energieträger an wachsender Bedeutung. Unter diesen nimmt die Erdwärme eine besondere Stellung ein, da sie – im Gegensatz zu anderen regenerativen Energien – global, kontinuierlich und auch längerfristig mit großen Potenzialen verfügbar ist.
Currently, there is a global problem of an increasing need of energy. There will be less fossil fuel, which will be more expensive in the future. The regenerative energies are getting more and more important. The subject deals with the problem of economical feasibility of geothermal energy systems. Its goal is to analyze nessesary conditions and aspects for realizing geothermal energy systems in comparison to and competition with traditional energy sources. The geothermal energy recovery is economically advantageous if the investment costs, esp. the drilling costs, could be reduced significantly. It only seems possible to open up a big opportunity for realizing geothermal energy systems by using a rock melt drilling technology, to reduce the investment costs significantly.