Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"coexistence mechanisms"”.
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Performance Analysis of Coexistence Schemes for LTE in Unlicensed Bands
… in high-traffic or low-signal locations, a fair coexistence mechanism with other networks, like Wi-Fi is essential. In this thesis, we propose two coexistence mechanisms that could be employed to ensure a fair channel access. First, we consider coexistence mechanism fundamentals, and then …
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Mechanisms facilitating coexistence between leopards (Panthera pardus) and their competitors in the Okavango Delta, Botswana
… on Earth, but relatively little is known of the mechanisms facilitating coexistence between some of its members. As such, I investigate coexistence mechanisms between leopards (Panthera pardus) and their competitors and present four pieces of original research on leopard ecology and monitoring, …
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Aspects of Islam and social coexistence: the case of Britain
This study deals with coexistence between Muslims and non-Muslims in the British society in the social context from an Islamic perspective. It identifies factors working for achieving coexistence between Muslims and non-Muslims in Britain. It also deals with factors that could undermine that …
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Spatiotemporally explicit incidence analysis of plant functional groups in metacommunities
Diese Arbeit untersucht die Rolle von Metagemeinschaftsmechanismen für die Diversität von Pflanzengemeinschaften in einer dynamischen, urbanen Landschaft. Dazu wird auf der Basis funktioneller Merkmale die relative Bedeutung von Ausbreitungslimitierung, abiotischem Stress und Konkurrenz bestimmt, …
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Quantitative ecology reveals scale-dependent structural processes of the Antarctic benthos through time
… and fossil collections. I first investigated coexistence mechanisms and competition for two solitary scleractinian cup coral populations at the centimetre scale on the rocky slopes of Powell Basin (~2000 m depth). Using Spatial Point Process Analyses I found that these corals likely produced …
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Coexistence of Wireless Networks for Shared Spectrum Access
… primary users; (ii) secondary-secondary network coexistence, i.e., mitigation of mutual interference among secondary users. The first problem has been addressed by spectrum sensing techniques in cognitive radio (CR) networks and geolocation database services in database-driven spectrum sharing. …
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The role of life history traits for coexistence and forest recovery after disturbance – a modelling perspective. Towards a better understanding of species-rich forests
… of this thesis concerns the question of species coexistence. We develop a theoretical model to analyze how different trade-offs between life history traits (tree growth, seed dispersal, tree mortality) affect tree species coexistence. We find that the considered trade-offs alone are not …
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Paving the Path of LTE Toward 5G: Physical Layer Assurance and Operation in the Unlicensed Spectrum
… in the industry for the LTE-Unlicensed and Wi-Fi coexistence, and we develop a new spectrum sharing technique for the coexistence between LTE-Unlicensed and radar systems. In order to analyze LTE-Unlicensed and Wi-Fi coexistence, we first explain the technical details of each of the three variants …
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Investigating mechanisms maintaining plant species diversity in fire prone Mediterranean-type vegetation using spatially-explicit simulation models
… to get a profound understanding of the crucial mechanisms of coexistence. In the current literature several mechanisms are discussed. The objective of my thesis is to systematically explore the importance of potential mechanisms for maintaining multi-species, fire prone vegetation by modelling. …
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Savanna dynamics under extreme conditions
… Initially attributed to resource competition, coexistence was considered the stable outcome of a root niche differentiation between trees and grasses. The importance of environmental factors became evident later, when data from moister environments demonstrated that tree cover was often lower …
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Coexistence of Vehicular Communication Technologies and Wi-Fi in the 5 and 6 GHz bands
… devices has also been increasing. Thus, coexistence across wireless technologies in the 5 GHz and 6 GHz bands has emerged as an extremely challenging and interesting research problem. In this dissertation, we first take a comprehensive look at the various coexistence scenarios that emerge …