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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Fluglärmbelastung und Immobilien

Thießen, Friedrich 23 September 2013 (has links) (PDF)
Der Ausbau mehrerer Flughäfen in Deutschland sowie die Installation neuer Flugrouten belasten die Bevölkerung mit Lärm. Die Wertänderung von Immobilien gilt als allgemeiner Indikator für die Folgen der Lärmbelastung. Die letzten Jahre brachten eine Zäsur in der Erforschung der Fluglärmwirkungen. Es sind mit den Internetportalen wie Immobilienscout 24 neue umfangreiche Datenquellen verfügbar. Diese wurde 2012 und 2013 in vier neuen Studien ausgewertet. Die Ergebnisse der neuen Studien werden vorgestellt. Wichtige Ergebnisse lauten: Die ältere Literatur wird hinsichtlich des NSDI (Noise Sensitivity Depreciation Index) bestätigt. Werte von 0,7 bis 1,2 können verifiziert werden. Auch Flugrouten verursachen Wertminderungen. Die Wertminderungen betragen etwa 100 Euro/m2 Wohnfläche pro Kilometer mehr Nähe zum Flugroutenzentrum (etwa 3% des Immobilienwertes). Wertminderungen hängen ab von der Intensität der öffentlichen Diskussion. Über- und unterschießende Effekte sind zu beobachten. Wertminderungen durch neue Flugrouten sind größer als Werterhöhungen durch entfallende Flugrouten. / The development of several airports in Germany as well as the introduction of new flight routes is a strain on most citizens. The change in value of real estate property is widely acknowledged as the general quantitative indicator of the consequences of noise pollution and congestion. In recent years new research on the effects of noise pollution has signified a turning point. Internet portals such as the German Immobilienscout 24 made available new data sources for possible investigation. Evaluation of this data was carried out in four new studies. This paper presents the results of these data analyses. The most important findings are: Older literature findings can be confirmed regarding the NSDI (Noise Sensitivity Depreciation Index). Values of 0.7 to 1.2 can be verified. Flight routes provoke a depreciation in value of real estate. The impairment loss is roughly 100 Euro/m² of living area per kilometer distance to the nearest flight route center (3% of the real estate value). Such depreciation in value reacts to the intensity of the public discourse. Over- and undershooting effects have been found. The depreciation due to newly introduced flight routes is larger than the appreciation due to terminated old flight routes.
2

Fluglärmbelastung und Immobilien: Ergebnisse neuer Studien für Deutschland

Thießen, Friedrich 23 September 2013 (has links)
Der Ausbau mehrerer Flughäfen in Deutschland sowie die Installation neuer Flugrouten belasten die Bevölkerung mit Lärm. Die Wertänderung von Immobilien gilt als allgemeiner Indikator für die Folgen der Lärmbelastung. Die letzten Jahre brachten eine Zäsur in der Erforschung der Fluglärmwirkungen. Es sind mit den Internetportalen wie Immobilienscout 24 neue umfangreiche Datenquellen verfügbar. Diese wurde 2012 und 2013 in vier neuen Studien ausgewertet. Die Ergebnisse der neuen Studien werden vorgestellt. Wichtige Ergebnisse lauten: Die ältere Literatur wird hinsichtlich des NSDI (Noise Sensitivity Depreciation Index) bestätigt. Werte von 0,7 bis 1,2 können verifiziert werden. Auch Flugrouten verursachen Wertminderungen. Die Wertminderungen betragen etwa 100 Euro/m2 Wohnfläche pro Kilometer mehr Nähe zum Flugroutenzentrum (etwa 3% des Immobilienwertes). Wertminderungen hängen ab von der Intensität der öffentlichen Diskussion. Über- und unterschießende Effekte sind zu beobachten. Wertminderungen durch neue Flugrouten sind größer als Werterhöhungen durch entfallende Flugrouten. / The development of several airports in Germany as well as the introduction of new flight routes is a strain on most citizens. The change in value of real estate property is widely acknowledged as the general quantitative indicator of the consequences of noise pollution and congestion. In recent years new research on the effects of noise pollution has signified a turning point. Internet portals such as the German Immobilienscout 24 made available new data sources for possible investigation. Evaluation of this data was carried out in four new studies. This paper presents the results of these data analyses. The most important findings are: Older literature findings can be confirmed regarding the NSDI (Noise Sensitivity Depreciation Index). Values of 0.7 to 1.2 can be verified. Flight routes provoke a depreciation in value of real estate. The impairment loss is roughly 100 Euro/m² of living area per kilometer distance to the nearest flight route center (3% of the real estate value). Such depreciation in value reacts to the intensity of the public discourse. Over- and undershooting effects have been found. The depreciation due to newly introduced flight routes is larger than the appreciation due to terminated old flight routes.
3

Evaluation of the Hybrid-Electric Aircraft Project Airbus E-Fan X

Benegas Jayme, Diego January 2019 (has links) (PDF)
Purpose - This master thesis evaluates the hybrid-electric aircraft project E-Fan X with respect to its economical and environmental performance in comparison to its reference aircraft, the BAe 146-100. The E-Fan X is replacing one of the four jet engines of the reference aircraft by an electric motor and a fan. A turboshaft engine in the cargo compartment drives a generator to power the electric motor. --- Methodology - The evaluation of this project is based on standard aircraft design equations. Economics are based on Direct Operating Costs (DOC), which are calculated with the method of the Association of European Airlines (AEA) from 1989, inflated to 2019 values. Environmental impact is assessed based on local air quality (NOx, Ozone and Particulate Matter), climate impact (CO2, NOx, Aircraft-Induced Cloudiness known as AIC) and noise pollution estimated with fundamental acoustic equations. --- Findings - The battery on board the E-Fan X it is not necessary. In order to improve the proposed design, the battery was eliminated. Nevertheless, due to additional parts required in the new configuration, the aircraft is 902 kg heavier. The turboshaft engine saves only 59 kg of fuel. The additional mass has to be compensated by a payload reduced by 9 passengers. The DOC per seat-mile are up by more than 10% and equivalent CO2 per seat-mile are more than 16% up in the new aircraft. --- Research limitations - Results are limited in accuracy by the underlying standard aircraft design calculations. The results are also limited in accuracy by the lack of knowledge of some data of the project. --- Practical implications - The report contributes arguments to the discussion about electric flight. --- Social implications - Results show that unconditional praise given to the environmental characteristics of this industry project are not justified.

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