Böcker utgivna av Cuvillier

This work proposes methods for modeling the acoustic behavior of induction machines as well as optimization approaches for the control of the acoustic behavior. The aim of this work is to simplify and improve the quality of the acoustic modeling of induction machines and to show possible optimization measures in order to make the application and its understanding accessible to a broader group of users. In this work, approaches for the efficient modeling of harmonic phenomena in the electromagnetics of induction machines are shown and analyzed. This work focuses on the development of efficient geometric models for the calculation of electromagnetics of induction machines, which are substantially based on analytical equations and are used in an extended simulation via numerical methods. Subsequently, a method for the acoustic calculation of the vibrations resulting from the electromagnetic force excitation on the surface of the housing of the electrical machine is presented. The approach for the calculation of the surface vibrations is based on the system simulation and the vibration synthesis approach. The presented method offers the possibility to present extensive and realistic models and can therefore contribute to the optimized design of induction machines and many other types of electric drive systems. The procedure consists of a two-stage process, whereby a distinction is made between an offline calculation, as a prediction for model parametrization and for the calculation of the electromagnetic behavior as well as an online calculation, which includes the actual acoustic calculation. Based on this efficient calculation method, control and sensor influences as well as spatial harmonics and inverter switching frequency orders can be analyzed and optimized. In addition, two methods are presented, which refer exclusively to the changes of the software and their parametrization of the electric drive system. On the one hand, this work presents a procedure which improves the acoustic behavior by changing the operating point at constant torque and speed of the electric drive. Another method describes the injection of voltage pulses to generate harmonic current oscillations, which counteract with the excitation of occurring vibrations and thus contribute to the reduction and optimization of the acoustic behavior of the induction machine and thus of the electric drive train. Underlining the results of the presented methods, the results of the simulation models are proposed and compared to measurements.

Die Festschrift ¿Kartvelology, Kartosphere, Kartophony¿ (Language, Culture, Identity) stellt einen Sammelband dar, der die wissenschaftlichen Beiträge aus den thematisch miteinander flankierenden Bereichen wie Linguistik der Kartvelsprachen (Georgisch, Megrelisch, Lazisch, Tchanisch), georgische Literatur, georgische Geschichte und Bizantinistik beinhaltet. Die Artikel haben überwiegend empirische Natur und sind auf die Analyse von Sprachdaten bzw. Archivmaterialien basiert. Methodisch decken die Abhandlungen klassische Desktiptivistik, Komparatistik sowie Korpuslinguistik und Feldforschung ab. Die Festschrift ist der georgischen Kartvelologin Emeritus Prof. Jujuna Peikrishvili gewidmet. Auch aus diesem Grund stehen nach allen Beiträgen die einseitigen georgischsprachigen Resümees sowie die akademische Biografie von Prof. Peikrishvili am Ende des Bandes.

Companies across a wide range of industries are affected by the increasing relevance of digital innovation and their related organizing challenges. Against this background, it is unclear how this influences the role of the established IT function in incumbent firms. Although digital innovations require IT-related knowledge and capabilities, the corporate IT function seems unprepared with regards to their organizational structure and capabilities.Therefore, this cumulative dissertation comprises four individual studies at the intersection of digital innovation and the IT function. These studies mainly address the following research goals: (1) to understand how the increasing prevalence of digital innovation is changing the IT function¿s organizing logics, and (2) to understand how the IT function can contribute to the effective and efficient development of digital innovations.On the one hand, the thesis shows that digital innovation projects can trigger new value commitments of IT functions regarding their organizing logic. On the other hand, the results implicate that IT functions require sufficient organizational support and decision rights, as well as organizational agility and ambidexterity, to successfully contribute to their firms¿ digital innovation activities.

After the occurrence of a disaster (e. g. an earthquake or tsunami) one of the main needs for the rescue teams and volunteer helpers is a functional communication infrastructure even during the first hours. The disaster recovery system (DRS) which is proposed in this work is based on an IEEE 802.11s wireless mesh network which is set up by non-damaged, legacy, mesh capable and battery powered devices still available in the disaster region. Key considerations concerning the performance of a DRS are the required node density, the coverage that can be achieved by a given node density, scalability as well as the lifetime of the system. For lifetime of the system. For lifetime enhancement, which is a key challenge for the proposed DRS on battery powered devices, a distributed algorithm is proposed which enhances the lifetime of such a system by an approach which allows to shut down non-necessary nodes and to keep them for a later usage while still keeping network connectivity.

The European Conference on African Studies, held in 2017 in Basel, Switzerland, provided a platform for scholars working on African youth languages from bases in Africa, Europe and North America to jointly examine issues relating to the rural -urban divide in African youth languages. This is documented in the current volume. Contributors ponder the virtual absence of indigenous, non-colonial languages of Africa in studied African youth language corpora. They demonstrate that, notwithstanding the surface linguistic appearance of the African youth languages and practices that have engaged the attention of scholars, the languages ultimately bear the mark and intensity of the rural and indigenous as a major and sometimes dominant component. This points to the need for paradigms or models that incorporate rural-indigenous factors in African youth language scholarship.

Biological plant protection products can be an important tool in integrated pest management. The production and formulation of micro-organisms to an applicable product are still a challenge. The final product is a compromise between biomass production, storage and efficacy capabilities. Often the performance depends from the testing system in fact antagonism showed in laboratory or controlled chambers can fail in the field. Therefore it is important to test biological plant protection products at the intended application environment. Also storage and efficacy tests should be made with the final product since the living organisms there contained can be influenced by the fermentation and the formulation processes. Cooperation between industry, science and farmers is needed to develop a product with stable results in time and different environments.Die Entwicklung adäquater Produktions-, Formulierungs- und Applikationsmethoden ist ein fundamentaler Schritt bei der Vorbereitung von Bioprodukten für deren Vermarktung. Die meisten Wirksamkeitsstudien wurden in kontrollierten Umgebungen und ohne Formulierung durchgeführt, was zu Biopestiziden führte, welche eine inkonsistente Leistung im kommerziellen Bereiche zeigten und so das Vertrauen der Anwender in diese Produkte minderte. Kultivierungsmethoden beeinflussten das formulierte Endprodukt sowie die Formulierung, die Lagerfähigkeit und die Wirksamkeit.Ein Ziel dieser Arbeit war es, den Beitrag des Gefriertrocknungsprozesses auf das Verhalten von Pseudomonas zu testen und festzustellen, ob die Fermentierungsbedingungen Einfluss auf das Überleben sowie die Wirksamkeit gefriergetrockneter Zellen eines ausgewählten P. fluorescens-Stammes haben. Weiterhin soll die Arbeit Aufschluss über die Anwendbarkeit von formulierten mikrobiellen Produkten im integrierten Pflanzenschutz und unter konkrete Bedingungen liefern.

For people suffering from social anxiety disorder (SAD), social interactions imply severe distress. Nonetheless, little is known about the social-interactional effects of stress and the stress-related psychobiology in SAD.The thesis presents the findings of a research project on the social-interactional consequences of acute stress in SAD patients. In contrast to healthy controls, SAD patients did not exhibit increased affiliation behavior under stress, but rather showed reduced prosocial behavior. Furthermore, the findings suggest that cognitive empathy modulates SAD patients¿ way of dealing with social stress. The results extend previous data in the domain of stress reactivity and social behavior in social anxiety and provide leverage points for future studies.

The catastrophe of 9/11 engendered a hitherto unknown immensity of photographic production. The medial processing of this production in the direct aftermath of the events deeply impacted the collective consciousness. This work focuses through the example of this ¿catastrophic pictorial production¿ the contractions held within the perceptual realization of the pictorial sign in the context of the pictorial turn, which is diagnosed as taking place in the Western culture. In the analyses it is shown here how the application of the pictures of two pictorial groups (in The New York Times and the pictorial archive ¿here is new york¿) is realized as a trauma.

Tropentag is the largest interdisciplinary conference in Europe on research in sub-/tropical agriculture, food security, natural resource management and rural development. Taking place annually, Tropentag 2019 is jointly organised by the Centre for International Rural Development at the University of Kassel and the Centre of Biodiversity and Sustainable Land Use at the University of Göttingen, and takes place at the University of Kassel's main campus from 18 to 20 September 2019.

The objective of this PhD thesis is the enhancement of understanding and prediction of capillary wetting of heterogeneous, soluble food powders. Therefore, the capillary penetration is studied experimentally by increasing stepwise the complexity. Firstly, the heterogeneity in terms of contact angle and the effect of solubility during capillary wetting as the two main influencing factors are investigated separately and in a second step both factors are combined. Furthermore, a new model based on the coupling of the Washburn and the mass transfer equation is presented dealing simultaneously with capillary penetration and dissolution. It is observed that the viscosity increase is dominant during liquid penetration for the powder systems containing the most soluble component (sucrose) at a high concentration. For powder mixtures containing a less soluble component with less viscosity development (sodium chloride), the hydrophobic contact angle drives the liquid penetration.

History of Horizons. December 4th, 2003. The seminar room in the Gottingen Center for Molecular Biosciences was bustling with activity. Organizers darted in and out of the room, making sure everything was in order and as it should be. Speakers attempted to look through their talking points, whilst entertaining the many curiosities of the next generation gathered around them. The graduate students themselves, whispered to each other and waited apprehensively, with thinly veiled excitement, for the program to begin. There were just under a hundred eager minds crowded into that one room. Students and researchers; all brought together by a shared passion: a passion for science. This was the inaugural Horizons in Molecular Biology Conference: An International PhD Student Symposium! The conference has come a long way since then. Over the years, the number of participants grew steadily and increased in variety. Horizons now regularly attracts around three hundred participants from over thirty countries. The symposium has featured numerous renowned researchers, representing a wide range of fields in the life sciences. This exhaustive list also included several Nobel Laureates, namely: Professors Martin Chalfie, Sir John Walker, Ada Yonath, Thomas Südhof, Kurt Wüthrich, Carol Greider, Venki Ramakrishnan, Sir John Gurdon, Tim Hunt, and this year Michael Rosbash.

Turbulent Taylor-Couette flow, where the fluid is confined by two coaxial and independently rotating cylinders, is experimentally investigated within this thesis for medium and wide gaps. To reveal the influence of flow patterns on the angular momentum transport, direct torque measurements, flow visualizations and particle image velocimetry are performed in two different facilities. For the largely unexplored radius ratio regime of ¿ = 0.357, the directly measured torque features a transition as a function of shear, which is connected to the capacity of the outer cylinder to emit small-scale plumes. When the cylinders rotate slightly in counter-direction, a maximum in torque occurs at ¿max = -0.123, which is induced by the formation of large-scale Taylor vortices. The contribution of these vortices to the overall momentum transport clearly exceeds the contribution of the turbulent fluctuations for ¿ = 0.5. Furthermore, the large-scale Taylor rolls are driven by small-scale plumes and feature azimuthally traveling waves for ¿ = 0.714. Accordingly, the angular momentum transport in medium and wide-gap turbulent Taylor-Couette flow is determined by the interaction of turbulence and flow patterns of different scales.

¿Experimentelle Untersuchung des turbulenten Transports in der Taylor-Couette Strömung¿ Ein berühmtes Beispiel für Stromungsinstabilitaten kommt zwischen zwei konzentrischen, unabhängig rotierenden Zylindern vor. Drehimpuls wird im Falle einer differentiellen Rotation zwischen den Zylindern transportiert. Die so genannte Taylor-Couette (TC) Strömung ist von grundlegender Bedeutung für Transportprozesse in rotierenden Systemen, wie der Erdatmosphäre und Akkretionsscheiben oder industriellen Anwendungen, wie Gleitlagerung, Seperation oder Mischungen. Ein besseres Verständnis der Transportprozesse und turbulenten Strukturen sowie eine einheitliche Beschreibung der komplexen Aspekte sind Aufgaben groser Tragweite vieler Forschungsgebiete. Die Absicht dieser Arbeit ist die experimentelle Untersuchung der turbulenten Taylor-Couette Strömung des Radienverhältnissees ¿ = 0.5 bei hohen Scher-Reynoldszahlen und der Rotation des Innen- sowie Ausenzylinders.

E-government and its connection with administrative reforms are commonly regarded as important milestones for e-democracy and e-participation - although they have been poorly investigated so far. The book attempts to tap the potential of e-government in a pilot study for Germany and Vietnam. At first glance, such an approach seems daring, as the two countries differ considerably in their political systems. All the more surprising are the results reached by the German-Vietnamese working group. The findings on e-government and its service quality are disappointing for both countries. Even the question has arisen as to what advantages citizens can have through it. From the German perspective, critical voices on the potential of e-government for political participation and deliberation predominate. The Vietnamese side considers the possibilities for e-democracy, e-participation and in the fight against environmental pollution and corruption to be much more positive. It can be assumed that this is related to the greater leap in development made by countries such as Vietnam compared with Germany through information and communications technology.E-Government und sein Zusammenhang mit Verwaltungsreformen werden allgemein als wichtige Meilensteine für E-Demokratie und E-Partizipation angesehen - obwohl sie bisher nur unzureichend untersucht wurden. In einer Pilotstudie für Deutschland und Vietnam versucht das Buch, das Potenzial von E-Government zu erschließen. Auf den ersten Blick erscheint ein solcher Ansatz gewagt, da sich die beiden Länder in ihren politischen Systemen stark unterscheiden. Umso überraschender sind die Resultate der deutsch-vietnamesischen Arbeitsgruppe. Die Ergebnisse zum Thema E-Government und dessen Servicequalität sind für beide Länder enttäuschend. Es stellt sich sogar die Frage, welche Vorteile die Bürger durch es haben können. Aus deutscher Sicht dominieren kritische Stimmen über das Potenzial von E-Government für politische Partizipation und Deliberation. Die vietnamesische Seite schätzt die Möglichkeiten für E-Demokratie, E-Beteiligung und im Kampf gegen Umweltverschmutzung und Korruption für wesentlich positiver ein. Es ist davon auszugehen, dass dies mit dem größeren Entwicklungssprung von Ländern wie Vietnam im Vergleich zu Deutschland durch Informations- und Kommunikationstechnologien zusammenhängt.

An efficient post-combustion capture technology is the carbonate looping (CaL) process reducing the amount of CO2 released by fossil fuelled power and industrial plants (CCS/U). Limestone based sorbents are circulated between two interconnected circulating fluidized bed (CFB) reactors. In a first reactor, the carbonator, the main part of CO2 contained in the flue gas of an upstream emission source is absorbed by CaO. The CO2 is released and the sorbent regenerated under oxy-firing conditions in a second reactor, the calciner. The present work discusses the results obtained from experimental investigation of the Carbonate Looping process in semi-industrial 1 MWth scale. Long-term pilot tests were conducted to improve the process and gain reliable experimental data to scale up the CaL process to industrial size. The type of fuel, sorbent, flue gas composition, reactor design, and operating conditions were varied to assess the operability and the long-term effects on the process performance. During periods of up to 60 h, parameters were not changed to achieve steady-state conditions. The stability of the CaL process in semi-industrial size was proven by steady-state CO2 absorption for more than 1,500 h with interconnected circulating fluidized bed reactors with absorption rates in the carbonator higher than 90% and overall capture rates higher than 95 %. The experimental data obtained in this work provide the basis to take the CaL process to the next stage of development, a demonstration pilot with a thermal size of 20 MWth. A conceptual plant setup for this demonstration unit was derived from the operational experience in the 1 MWth pilot plant. Based on evaluation of pilot testing and with the help of a validated process model, the design parameters were defined and verified. The heat and mass balancing for various operating cases was carried out to define the boundary conditions for the engineering of the demonstration pilot. Furthermore, the assessment of the demonstration pilot showed the expected performance.

Im Rahmen der Dissertation wurde eine Methode zur Quantifizierung der Metabolite des zentralen Kohlenstoffwechsels von Mikroorganismen entwickelt. Die Methode wurde genutzt, um das Metabolom verschiedenster Produktionsstämme im nanomolaren Bereich zu analysieren. Bei der Analyse der Daten wurden Ergebnisse aus Metabolom- und Fluxomforschung kombiniert, um einen ganzheitlichen Ansatz zu schaffen. Auf diese Weise konnte unter anderem der Einfluss verschiedener Kultivierungsverfahren auf das Energielevel von E. coli untersucht werden. Weitere Messungen untersuchten den Einfluss von genetischen Veränderungen, Stress und unterschiedlichen C-Quellen auf den zentralen Kohlenstoffwechsel von weiteren Mikroorganismen.

Systemin is a small peptide with important functions in plant wound response signaling. To elucidate systemin perception and signal transduction mechanisms, a phosphoproteomic profiling study was performed to reconstruct a systemin-specific kinase/phosphatase signaling network. Time course analyses revealed early events at the plasma membrane, such as dephosphorylation of H+-ATPase, and the phosphorylation of NADPH-oxidase and Ca2+-ATPase in response to systemin. Later responses included transient phosphorylation of small GTPases and vesicle trafficking proteins, as well as transcription factors. Based on a correlation analysis of systemin-induced phosphorylation profiles, substrate candidates for 44 systemin-responsive kinases and 9 phosphatases were predicted, some of which are involved in a regulatory circuit for the regulation of the plasma membrane H+-ATPase. In this regulatory model, H+-ATPase LHA1 is rapidly de-phosphorylated at its C-terminal regulatory residue T955 by phosphatase PLL5, resulting in the alkalization of the growth medium within two minutes of systemin treatment. LHA1 is re-activated by MAP-Kinase MPK2 later in the systemin response. A valuable resource of proteomic events involved in the systemin signaling cascade is provided with a focus on the prediction of substrates to early systemin-responsive kinases and phosphatases.

The phosphinoamide chemistry has attracted a considerable attention owing to the structural diversity of the associated complexes. To further understand the properties of the P-N bond, Ashby synthesized the compound [(Ph2P-NPh)Li(Et2O)] through the deprotonation reaction of the corresponding aminophosphine with nBuLi. X-ray diffraction analyses indicated the presence of Li-P bonds (2.684 and 3.004 Å). In addition, the P-N bond length (1.672(2) Å) was relatively smaller than that of a single bond (mean value of 1.70).

Today there is an increased focus on a considerable reduction of the total energy consumption in the world. As the heating of buildings constitutes a large part of this consumption, the development of highly efficient thermal insulation materials is highly demanded. The most promising class are polymeric nanofoams, which might be producible by using the "Principle Of Supercritical Microemulsion Expansion" (POSME). Within this approach, microemulsions with a high number density of CO2 nano-pools in a polymerizable material (e.g. polyol) are used as templates. Adjusting supercritical conditions, the nucleation of gaseous CO2 during the expansion is avoided, so that each CO2-swollen micelle should ideally grow to a nanopore. However, due to aging phenomena, so far only polyurethane (PU) foams with microcellular pores could be produced applying this approach. In order to improve the properties of the foamable microemulsion template, microemulsions of the type water - CO2 - non-ionic fluorinated surfactant (Capstone® FS-3100) were studied in the first part of this thesis as a model system. Small angle neutron scattering (SANS) measurements for the first time revealed the phase inversion from CO2-swollen micelles in water via bicontinuous structures to water-swollen micelles in CO2. Using a scaling description developed for microemulsions of the type water -alkane - CiEj, the temperature dependence of the length scales found in classical and CO2-microemulsions fall on top of each other. Moreover, the partial replacement of CO2 by cyclohexane was found to increase the efficiency of the fluorinated surfactant to form a bicontinuous microemulsion. This efficiency boosting could be correlated with the increase of the bending rigidities ¿0,SANS and ¿NSE determined by SANS and neutron spin echo (NSE). In the second part of this thesis the gained knowledge was successfully used to formulate CO2-in-polyol microemulsions appropriate for the production of nanocellular PU foams. Using SANS and partly deuterated polyol, not only the formation of micelles in the binary mixture of polyol and non-ionic siloxane surfactant, but also their swelling with CO2 could be proven. The change of the microstructure upon fast expansion and compression was studied combining time-resolved SANS-measurements and periodic pressure jumps. Interestingly, the pressure induced structural changes follow the pressure profile instantaneously, i.e. faster than the time resolution of 50 ms

The continuous and rapidly growing demand for mobile communication access led to a major increase in the number of base stations worldwide to provide sufficient coverage and quality of service. As a consequence, mobile communication networks have become a significant contributor to global energy consumption. Several advanced topologies for efficiency improvement of RF power amplifiers have been developed. Modulating the amplifier's supply voltage according to the variation of the envelope signal is one of the most promising concepts. This topology is investigated here, with an architecture that switches the supply voltage of the power amplifier in discrete levels with a class-G supply modulator.The thesis addresses comprehensively all aspects of class-G supply modulation. Several prototype designs were realized to validate the theory and to gain experience on the influence of the corresponding parameters. These include the discrete supply voltage levels, the switching thresholds, and the interface between the RF PA and the class-G supply modulator. Efforts both on improving the RF power amplifiers and developing several class-G supply modulators were also involved. This work covers the progress up to a PA module that provides an instantaneous modulation bandwidth of 120 MHz and achieves better performance than state-of-the art continuous supply modulation systems.Class-G supply modulated RF power amplifiers based on gallium nitride technology exhibit a strong nonlinear behavior, therefore linearization is required. For this purpose, the linearization with digital predistortion based on behavioral models is optimized for the class-G topology and a novel predistorter model is developed and analyzed.

BeschreibungWater Security is emerging as a primary sustainability challenge across the globe in the 21st century. It is a determinant for security in various societal and environ-mental aspects including food, energy, economy, environment and public health, and thus has a complex political momentum that goes far beyond the traditional water sector. In order to understand, to project, to address and to plan for water security challenges, one must collectively understand exposure to climate and environment driven hazards, as well as socio-economic determinants, and the cultural and political context, within which mankind live, work and play. Technologies (ranging from model-based scenarios and predictions to green and grey infrastructure and treatment systems, and from remote sensing to social media) and innovative financing and governance systems are proposed to address water security. This proceedings book of an International Workshop in São Paulo, Brazil will provide the reader the opportunity to acquire knowledge on Water Security considering water governance and management, technological innovation and emerging solutions for water conservation, reuse and recycle in order to achieve the Sustainable Development Goals proposed by the United Nations. More specifically, it intends to deliver essential state-of-the-art knowledge concerning- Water Security and its role in addressing the Sustainable Development Goals,- Challenges and opportunities to reach Water Security considering quality and availability, and- Water Security lessons learned and long term implications in developing countries

BeschreibungThe work at hand participates with the energy transition toward decarbonized electricity production by providing a method to analyze the incentives for the dispatchable fleet to provide flexibility. It analyzes the signals set by the energy markets to investors and power plant operators regarding flexible power plant operation and the future requirement of thermal plant flexibilisation, with improvement suggestions. A method for the quantitative, long-term, high-resolution techno-economic assessment of an individual power plant's operational flexibility is proposed. It includes the single unit self-scheduling problem of a merchant power plant solved from a price-taker perspective in the day-ahead, intraday and frequency control markets, as well as a parametric power plant model suited for operational flexibility assessments. The retroactive observation of the merchant power plants' operation strategies in these markets is used to identify best practices in terms of market design for flexibility incentives. The value of operational flexibility improvements is quantified using various metrics, for different technologies and market environments. Despite their sensitivity to market design, technologies and cost structures, these results indicate that if investors further expect a three to five-year return on investment, the existing European conventional fleet is unlikely to experience a significant flexibilization.

Soziale Medien wie Facebook eröffneten neue Kommunkationsmöglichkeiten für das Militär um sich im Arbeitsmarkt als attraktiver Arbeitgeber zu positionieren. Nach der Abschaffung der Wehrpflicht musste sich das Militär neu und attraktiv definieren, um Rekruten im Konkurrenzmarkt gegen den privaten Sektor anzuziehen. Diese Arbeit geht der Frage nach, wie das Militär in Deutschland, USA und Frankreich Attraktivität produziert, mit dem Ziel, die Personalgewinnung digital zu stärken. Dabei geht es um einen cyberanthropologischen Ansatz, der mit verschiedenen quantitativen und qualitativen Methoden die Perspektive von Rekruten und der Institution erfasst. Diese interdisziplinäre Annäherung auf die digitale Ebene der Kommunikation des Militärs versucht das Spektrum der Militäranthropologie und -soziologie auszuweiten, in dem Ansätze des Marketings und des Personalmanagements auch aufgefasst werden.So werden Employer-Branding Perspektiven des Militärs in einem internationalen Vergleich im jeweiligen politischen Kontext und unter mehrdisziplinären theoretischen Betrachtungen vorgestellt und analysiert. Die empirischen Ergebnisse weisen darauf hin, dass jedes Militär heterogen bleibt und jedoch kulturell und historisch geprägt wird, während es eine Attraktivitätspolitik schafft. Während die deutsche Bundeswehr sich eher mit Technik und kaum mit Geschichte befasst, setzt das französische Militär auf das zeremonielle, das design-intensive und das amerikanische Militär eher auf Werte, Patriotismus und nationalen Ikonen, die eine Identität dynamisch mitaufbauen.

Water is a key driver of economic and social development, while it also has a basic function in maintaining the integrity of the natural environment. The traditional fragmented approach of dealing with water issues is no longer viable and a hybrid system, which incorporates modern methods, is essential. This is a rational approach that has now been accepted internationally as the way forward for efficient, equitable and sustainable development of the world's limited but most precious resources.Finding solutions to these challenging hydric problems requires close collaboration between traditional knowledge and current science practices, expert practitioners, and stakeholders from private and public organizations. Therefore, this book encourages to contribute and to be part of the search for efficient solutions to water crisis in Sub Saharan Africa by widening scientific and technological know-how - and more importantly - engaging in knowledge brokerage. This book focuses on a multi-disciplinary diagnosis of water challenges in developing countries in general but specifically in Sub Saharan Africa, and proposes viable solutions with respect to modern and the traditional methods of water resource management. Specific areas of interest include water quality and quantity parameters, water supply in urban and rural areas, wastewater treatment and recycling.