Filtern
Erscheinungsjahr
- 2018 (50) (entfernen)
Dokumenttyp
- Dissertation (32)
- Bachelorarbeit (12)
- Masterarbeit (4)
- Habilitation (1)
- Beitrag in Konferenzband (1)
Schlagworte
- Energiewende (2)
- Entrepreneurship (2)
- Erneuerbare Energien (2)
- Gesundheitswesen (2)
- Healthcare (2)
- Nachhaltigkeit (2)
- Renewable Energies (2)
- Sustainability (2)
- Transformation (2)
- Abwasser (1)
- Abwasserbelastung (1)
- Ackerbau (1)
- Aufsichtsrat (1)
- Bank (1)
- Bank Bailout (1)
- Bankenkrise (1)
- Bankenrettung (1)
- Banking Crisis (1)
- Bees (1)
- Berlin (1)
- Berufliche Kompetenz (1)
- Bevölkerungsentwicklung (1)
- Bienen (1)
- Bildanalyse (1)
- Biocides (1)
- Biozide (1)
- Bürgerbeteiligung (1)
- Citizen Participation (1)
- Civic Engagement (1)
- Climate Simulation (1)
- Coastel environment (1)
- Cultural Management (1)
- Cultural Policy (1)
- Damascus (1)
- Damaskus (1)
- Data Mining (1)
- Day Care Center (1)
- Derivate (1)
- Deutsch als Zweitsprache (1)
- Digital Culture (1)
- Digitale Kultur (1)
- Disease Resistance (1)
- Early Childhood Education (1)
- Effizienz (1)
- Employee Health (1)
- Employee Management (1)
- Energieversorgung (1)
- Energiewirtschaft (1)
- Energy Transition (1)
- Entwicklungsländer (1)
- Epigenese (1)
- Epigenetik (1)
- Error Management (1)
- Erzgebirgisch (1)
- Familienunternehmen (1)
- Family Firm (1)
- Fehlerbehandlung (1)
- Financial Reporting (1)
- Financial Stability (1)
- Finanzstabilität (1)
- Frühkindliche Bildung (1)
- Game Studies (1)
- Geschäftsführung (1)
- Gewässer (1)
- Gründungsboom (1)
- Haftungsbegrenzung (1)
- Harz (1)
- Haushaltschemikalie (1)
- Image Analysis (1)
- Immunity (1)
- Interdisziplinäre Forschung (1)
- Jordan (1)
- Kapitalgesellschaft (1)
- Kapitalmarkt (1)
- Kinderlied (1)
- Kindertageseinrichtung (1)
- Klimamodell (1)
- Klimasimulation (1)
- Kommunikationstraining (1)
- Krankheitsresistenz (1)
- Kreditwesen (1)
- Kulturmanagement (1)
- Kulturpolitik (1)
- Kulturraum (1)
- Küstengebiet (1)
- Landwirtschaft (1)
- Lebensnaher Unterricht (1)
- Lehrer (1)
- Lehrerausbildung (1)
- Lower Saxony (1)
- Mediengeschichte (1)
- Mediennutzung (1)
- Mehrsprachigkeit (1)
- Mill, John Stuart (1)
- Mindset (1)
- Mitarbeiterführung (1)
- Mitarbeitergesundheit (1)
- Multilingualism (1)
- Mundart (1)
- Music (1)
- Musik (1)
- Musikgeschichte (1)
- Nachfolge (1)
- Nachhaltigkeitsforschung (1)
- Naturwissenschaftsunterricht (1)
- Negotiation (1)
- Network Analysis (1)
- Netzwerkanalyse (1)
- Neue Medien (1)
- Niedersachsen (1)
- Niederschlag (1)
- Nordseeküste (1)
- Online-Marketing (1)
- Palaeoclimate (1)
- Paläoklima (1)
- Partizipation (1)
- Persönlichkeit (1)
- Pflanzenkohle (1)
- Pflege (1)
- Philosophie (1)
- Pleistozän (1)
- Politische Strategie (1)
- Potsdam (1)
- Precipitation (1)
- Professional Competence (1)
- Prognose (1)
- Quartär (1)
- Quaternary (1)
- Recht (1)
- Regenerative Agriculture (1)
- Regenerative Landwirtschaft (1)
- Renaturierung <Ökologie> (1)
- Repräsentation <Politik> (1)
- Resin (1)
- Restoration <Ecology> (1)
- Ruhestand (1)
- Satellit (1)
- Schulentwicklung (1)
- Schädlingsbekämpfungsmittel (1)
- Sediment (1)
- Sekundarstufe I (1)
- Software (1)
- Soziale Medien (1)
- Soziales Engagement (1)
- Stadtverwaltung (1)
- Städtebau (1)
- Städtische Bauplanung (1)
- Sustainability Research (1)
- Syrien (1)
- Teacher Education (1)
- Termingeschäfte (1)
- Training (1)
- Umwelt (1)
- Umweltbelastung (1)
- Umweltverträglichkeit (1)
- University Culture (1)
- Universitätskultur (1)
- Unternehmensgründung (1)
- Unternehmer (1)
- Unternehmergesellschaft (1)
- Unternehmerverhalten (1)
- Unterricht (1)
- Urban Planning (1)
- Verantwortung (1)
- Verhandlung (1)
- Volkslied (1)
- Vorgründungsgesellschaft (1)
- Vorstand (1)
- Waschmittel (1)
- Wasseranalyse (1)
- Wastewater (1)
- Water Analysis (1)
- Weltraum (1)
- Weltraummüll (1)
- Wertpapiermarkt (1)
- Wirtschaftlichkeitsanalyse (1)
- Wirtschaftsbericht (1)
- Wärmespeicher (1)
- Zinsänderung (1)
- school improvement (1)
Institut
- Fakultät Nachhaltigkeit (19)
- Fakultät Wirtschaftswissenschaften (16)
- Fakultät Kulturwissenschaften (6)
- Fakultät Bildung (5)
- Institut für Nachhaltige Chemie und Umweltchemie (INUC) (4)
- Institut für Ökologie (IE) (3)
- Institut für Bank-, Finanz und Gründungsmanagement (IBFG) (2)
- Institut für Bildungswissenschaft (IBIWI) (2)
- Professional School (2)
- Berufs- und Wirtschaftspäd. (1)
In this cumulative thesis, the author presents four manuscripts and two appendixes. In the manuscripts he discusses mindsets and their relation to the effectiveness of negotiation training. His general claim is that mindsets promise to be relevant for training effectiveness. Still, more research needs to be done and chapter 3 presents the Scale for the Integrative Mindset of Negotiators (SIM) that can be used for some of that research. In the appendixes, the author presents two negotiation training exercises. The first addresses an international refugee policy summit and the second a negotiation over the sale of a large solar pv park in Thailand.
This research work aims to create a theoretical base for new urban planning guidelines involving a comprehensive study of housing in Damascus with emphasis on social and cultural factors. The research starts with a historical review of the Muslim City in general and distinguishes between cities that existed before Islam and then were conquered and modified by Muslims and cities established by Muslim Authority. The focus is only on the residential quarters in the city and the local market, mosque and etc (outside the old walled city of Damascus). Other Muslim city urban elements such as Grand mosque, caliph's residency, Citadel and etc. are not in the scope of this study. A brief historical review of Damascus before and during Islam and the development of residential quarters are illustrated. Later, the study analyzes the traditional residential quarter and explores the building guidelines that governed the evolution of the built form of the quarter. Then, the study explores the multi-faceted changes (economic, social and political) that the Middle Eastern region went through, in the last century, in general and the effect of those changes on the city form, case of Damascus. The effect will be traced through examining the decrees that the Authority issued in order to govern land reform and manage public and private domains. Then, the study looks at the ramifications of those decrees on the urban form of Damascus. It also investigates the decrees that were the guide for new planning and organizing developments. The study will inspect the end products of the planning and organizing process by studying several cases of building permits. Then, provides morphology of the new residential sub-quarter and its urban form. Based on lessons learned from the previous decades of housing policy, the study will recommend foundation for governmental norms to produce responsive physical and social urban forms.
The emission of anthropogenic trace substances into the aquatic environment continuously poses challenges to water suppliers. The contamination of raw waters with organic trace substances requires complex water treatment processes to secure drinking water quality. The routine monitoring of these raw waters as well as the behavior and fate of organic trace substances during different treatment processes is of great interest to recognize and counter potential dangers at an early stage. Non-target screening using liquid chromatography coupled to high-resolution mass spectrometry (LC-HRMS) allows the detection of thousands of compounds within a single run and covers known as well as unknown substances. Compared to the established analytical techniques, this is a decisive advantage for the monitoring of raw and process waters during water treatment. While the analytical technique LC-HRMS has undergone significant developments in recent years, the algorithms for data processing reveal clear weaknesses. This dissertation therefore deals with reliable processing strategies for LC-HRMS data. The first part of this work seeks to highlight the problematics of false positive and false negative findings. Based on repeated measurements, various strategies of data processing were assessed with regard to the repeatability of the results. To ensure that real peaks were barely or not removed by the filtering procedure, samples were spiked with isotope-labeled standards. The results emphasize that the processing of sample triplicates results in sufficient repeatability and that the signal fluctuation across the triplicates emerged as a powerful filtering criteria. The number of false positives and false negatives could be significantly reduced by the developed strategies which consequently improve the validity of the data. The second part of this thesis addresses the development of processing strategies particularly aimed at assessing water treatment processes. The detected signals were tracked across the treatment process and classified based on their fold changes. A more reliable signal classification was achieved by implementing a recursive integration approach. Special integration algorithms allow a reliable signal classification even though the signal to be compared was below the intensity threshold. Different combinations of replicates of process influents and effluents were processed for evaluating the repeatability. The good repeatability was indicated by the results of both the plausibility checks and the ozonation process (ozonation of pretreated river water) and thus points to high reliability. The applicability of the developed strategies to real world applications is demonstrated in the last part of this work. Besides the prioritization of the generated results, the main focus was the identification of recognized compounds. The developed strategies clearly improve the validity of the underlying data. The combination of LC-HRMS analysis with reliable processing strategies opens up multiple possibilities for a more comprehensive monitoring of water resources and for the assessment of water treatment processes. The processing strategies and validation concepts may be easily transferred to other research fields.
Online marketing, especially Paid Search Advertising, has become one of the most important paid media channels for companies to sell their products and services online. Despite being under intensive examination by a number of researchers for several years, this topic still offers interesting opportunities to contribute to the community, particularly because of its large economic impact and practical relevance as well as the detailed and widely unfiltered view of consumer behavior that such marketing offers. To provide answers to some of the important questions from advertisers in this context, the author present four papers in his thesis, in which he extends previous works on optimization topics such as click and conversion prediction. He applies and extends methods from other fields of research to specific problems in Paid Search. After a short introduction, the dissertation starts with a paper in which the authors illustrates a new method that helps advertisers to predict conversion probabilities in Paid Search using sparse keyword-level data. They address one of the central problems in Paid search advertising, which is optimizing own investments in this channel by placing bids in keyword auctions. In many cases, evaluations and decisions are made with extremely sparse data, although anecdotal evidence suggests that online marketing is a typical "Big Data" topic. In the developed algorithm presented in this paper, the authors use information such as the average time that users spend on the advertiser's website and bounce rates for every given keyword. This previously unused data set is shared between all keywords and used as prior knowledge in the proposed model. A modified version of this algorithm is now the core prediction engine in a productive Paid Search Bid Optimization System that calculates and places millions of bids every day for some of the most recognized retailers and service providers in the German market. Next, the author illustrates the development of a non-reactive experimental method for A/B testing of Paid Search Advertising activities. In that paper, the authors provide an answer to the question of whether and under what circumstances it makes economic sense for brand owners to pay for Paid Search ads for their own brand keywords in Google AdWords auctions. Finally, the author presents two consecutive papers with the same theoretical foundation in which he applies Bayesian methods to evaluate the impact of specific text features in Paid Search Advertisements.
The increasing perils of connectivity technologies in the context of large satellite constellations come alongside with legal aspects concerning the protection of the space environment. The interplay of connectivity and sustainability must be regulated. To analyse the legal measures and tools regulating the risks, both sides of the problem are taken into consideration. The technological side of large satellite constellations is summarized under the term cybersecurity. Cyber is a code-based system, i.e. at first sight it requires a specialized field of law. This holds true on space sustainability as well. Large satellite constellations raise the discussion on space debris and junk. The consensus on the LTS guidelines by COPUOS at UNISPACE+50 in 2018 constitutes a milestone in Space Law. Space sustainability requires a particular adoption of legal norms: the idea is very similar to the subject of cybersecurity. Since both areas of issue are internationally driven and have multilateral impact, self-regulation proves ineffective. The genesis of reliable and uniform legal rules requires a different approach considering the multilevel systems of obligations with different binding authority. This thesis evaluates the balance between the future of connectivity and space sustainability in the context of large satellite constellations by considering the impact of legal rules with different binding authority.
In Niedersachsen existiert eine florierende, ausdifferenzierte kulturelle Szene. Vor allem im Musikbereich sind zahlreiche, teilweise international agierende Initiativen und einige kleinere und mittlere Unternehmen wie auch Solokünstler aktiv, die in einem regen Austausch miteinander stehen. Diese Akteure treten in der Regel mit der Erwartung einer positiven Auswirkung und Nutzensteigerung einem Netzwerk bei. Selten wird jedoch hinterfragt oder im Anschluss evaluiert, inwiefern das jeweilige Netzwerk zur positiven Verstärkung der Einzelakteure, im ökonomischen wie auch im sozialen oder kulturellen Sinne geführt hat, beziehungsweise inwieweit Netzwerkbildungen auch zu negativen Effekten für ihre Akteure führen können. In dieser Dissertation wird mit qualitativen Methoden und auf theoretischer Basis der Relationalen Soziologie die Situation in Bezug auf Netzwerkbildungen im Musiksektor von Niedersachsen analysiert. Dies geschieht vor den Fragen, wer die Akteure in Niedersachsen sind, und welchen Funktionsweisen und Mechanismen ihre Vernetzungsbestrebungen unterliegen. Ferner werden die Interaktionen zwischen sozialen Akteuren und institutioneller Kulturarbeit im Musiksektor dargestellt und aufgezeigt, welche Prozesse in diesem Musiknetzwerk unter dem Einfluss institutioneller Strukturen ablaufen.
Social insects like honeybees (Apis mellifera) and stingless bees (Apidae: Meliponini) face a relatively high risk to be attacked by pests and pathogens. To decrease the risk of infection, in addition to an innate immune system, these species have evolved various cooperative defense mechanisms which contribute to the overall health of the colonies and are therefore also referred to as social immunity. The collection and use of plant resin is another important strategy of social immunity. Resin is a sticky, often aromatic substance with antimicrobial and deterrent properties secreted by plants for protection of the vegetative tissue. Honeybees and stingless bees take advantage of these properties by using resins for nest construction (often mixtures of resin and wax called "propolis" or "cerumen") and as defense against pests and pathogens. Plant resins, thus, play a crucial role for the ecology of these species and are an important resource for them. Nevertheless, how bees exploit available resin sources and if resin collection can protect colonies from diseases received comparatively little attention in the past. Therefore the aim of this thesis is to provide new insights into the plant origin and significance as well as the influence of resin resource diversity on bee colony health. For honeybees (A. mellifera) in temperate regions, precise information about which resin sources they use is largely lacking. By chemical comparing bee-collected resins and tree resins, the researcher traced back the resin sources used by individual bees. Results show that honeybees collect distinct resin types that are related to different tree species (several poplar species: Populus balsamifera, P. xcanadensis; Betula alba; Aesculus hippocastanum; several poplar species). With this study, the author provided the first evidence, that A. mellifera in temperate regions use a variety of different tree species as resin sources and, moreover, show preferences for specific resin sources. Furthermore, the researcher conducted an experimental field study in which she investigated whether propolis, as it is naturally deposited in the nests, can protect honeybee colonies against some of the most important pathogens (Varroa destructor mite, Deformed Wing Virus). The results of this study showed that propolis in (semi-) natural conditions can increase the disease resistance of honeybee colonies, underscoring the importance of resins for honeybee health. Resin collection by stingless bees is comparatively well studied and it is known that these species commonly forage on a variety of different plant species. To increase knowledge on whether and how bees may profit from a diversity of resin resources, the researcheer tested how the protective function of a resin varied among different sources (and their mixtures) and various potential aggressors (predators, parasites and pathogens). The results of this study revealed that resins from different trees vary in their effectivity against different target organisms. Moreover, resin blends were more effective than some of the individual resins, suggesting that bees can benefit from a variety of resin resources. In summary, honeybees in temperate regions, similar to tropical stingless bees, use a variety of different tree species as resin sources. Because resins from different tree species varied in their protective function, this indicates that bees can profit from a variety of different resins/resin sources by improving the defense against diverse pests and pathogens. Conversely, the lack of resin had a negative impact on the disease resistance of colonies. Consequently, availability as well as the variety of suitable resin sources is of great importance for the health of bees.
Die heutige industrielle Landwirtschaft birgt vielfältige Probleme wie die Degradierung der Böden, den Verlust von Biodiversität, Nitrate im Grundwasser sowie die hohe Abhängigkeit von fossilen Energieträgern. Einen möglichen Lösungsansatz bietet das Konzept der regenerativen Landwirtschaft, welches weltweit zunehmend Beachtung findet. Deren Ziel ist es, Agrarökosysteme und insbesondere die Böden kontinuierlich zu verbessern, indem durch bestimmte landwirtschaftliche Methoden und ganzheitliches Management unter anderem gestörte Nährstoff-, Wasser- und Kohlenstoff- Kreisläufe wieder geschlossen werden. Die Verwendung von Pflanzenkohle als Bodenhilfsstoff könnte ein mögliches Werkzeug der regenerativen Landwirtschaft sein, da Forschungen gezeigt haben, dass Pflanzenkohle durch ihre spezifischen Eigenschaften in der Lage ist, die physikalischen und chemischen Eigenschaften des Bodens langfristig zu beeinflussen und dadurch zum Bodenaufbau beizutragen. Es handelt sich jedoch um eine vergleichsweise neue Methode, die in Deutschland bislang wenig praktiziert wird, und es gibt einige Kritik an der Produktion und Verwendung von Pflanzenkohle. Das Ziel der Arbeit ist es daher herauszufinden, ob und auf welche Weise die Verwendung von Pflanzenkohle im Ackerbau ein Bestandteil einer regenerativen Landwirtschaft in Deutschland sein kann. Hierfür wurden auf Grundlage der vorhandenen Literatur einige Thesen aufgestellt. Für die empirische Erhebung von Praxiswissen wurden leitfadengestützte Experteninterviews mit je einem Vertreter der Anbauweisen biologisch-dynamisch, organisch-biologisch und der Permakultur geführt. Die Ergebnisse wurden ergänzt durch ein Interview mit einer Expertin aus dem Bereich der Pflanzenkohleproduktion, um technische Details zu konkretisieren. Im Ergebnis wird unter anderem deutlich, dass der Pflanzenkohleeinsatz für jede Fläche gründlich überlegt werden muss. Allgemein sollte Pflanzenkohle nur in kleinen, dezentralen landwirtschaftlichen Systemen eingesetzt werden und Teil einer Abfall-Management-Strategie sein. Es müssen sowohl das Ziel der Anwendung, als auch die Eigenschaften der eingesetzten Kohle bekannt sein und ein Einsatz sollte nur in einem System erfolgen, welches bereits regenerativ bewirtschaftet wird.