Relevant bibliographies by topics / Channel adaptation / Dissertations / Theses
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Dissertations / Theses on the topic 'Channel adaptation'

Author: Grafiati
Published: 25 May 2024
Last updated: 31 July 2025

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1

Choi, Jihwan Patrick 1975. "Channel prediction and adaptation over satellite channels with weather-induced impairments." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9070.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.<br>Includes bibliographical references (leaves 85-87).<br>Title as it appears in MIT commencement exercises program, June 2000: Satellite channels with weather-induced impairments.<br>Bad weather conditions, especially due to rain, cause satellites operating at high frequencies (above 10 GHz) to have significant link attenuation. Usually extra link margins are used to assure link availability. These margins cause inefficient use of precious satellite and terminal power, and unneces
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2

Qela, Blerim. "The 8-channel dynamic channel equalizer and its adaptation as a "smart amplifier solution"." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/27013.

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In this thesis, design of the 8-channel DCE (Dynamic Channel Equalizer) for use in WDM (Wavelength Division Multiplexing) systems in general and in particular its adaptation as a "Smart Amplifier Solution" is presented. The innovative Optimized C-band Gain Flattened EDFA (Erbium Doped Fiber Amplifier) design without GFF (Gain Flattening Filter) and its integration with the DCE and embedded control electronics into a Smart Amplifier is proposed. Further improvement of the Smart Amplifier is suggested. The systems design approach, where all subsystems are taken into account to optimize the WDM n
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Ran, Jianjun. "Signal processing, channel estimation and link adaptation in MIMO-OFDM systems." Göttingen Cuvillier, 2008. http://d-nb.info/989862291/04.

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4

Du, Jinfeng. "Pulse Shape Adaptation and Channel Estimation in Generalised Frequency Division Multiplexing Systems." Licentiate thesis, Stockholm : Informations- och kommunikationsteknik, Kungliga Tekniska högskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9457.

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5

Ogino, Tetsuya. "Environmental adaptation mechanism in marine annelids." Kyoto University, 2019. http://hdl.handle.net/2433/242707.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第21830号<br>農博第2343号<br>新制||農||1068(附属図書館)<br>学位論文||H31||N5202(農学部図書室)<br>京都大学大学院農学研究科応用生物科学専攻<br>(主査)教授 佐藤 健司, 教授 澤山 茂樹, 准教授 豊原 治彦<br>学位規則第4条第1項該当
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El, Yakzan Adnan. "Performance prediction, parameter selection, and channel adaptation in the line-of-sight outdoors optical wireless channels using intelligent systems." Thesis, University of Warwick, 2013. http://wrap.warwick.ac.uk/59682/.

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With the increased usage of optical wireless communication, finding appropriate parameters for reliable transmission and providing efficient channel performance have become of challenging interest in research and industry. This has been a strong motivation to examine and develop methods and techniques to find suitable link parameters to increase the channel availability. This thesis is mainly concerned with designing, implementing and adapting intelligent algorithms to solve for parameter selection, channel prediction, and channel adaptation in dynamic optical wireless channels. The problem co
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7

Huusko, J. (Jarkko). "Communication performance prediction and link adaptation based on a statistical radio channel model." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526211473.

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Abstract This thesis seeks to develop a robust semi-analytical performance prediction method for an advanced iterative receiver that processes spatially multiplexed signals that have propagated through frequency-selective receive correlated multiple-input multiple-output (MIMO) wireless communication channels. In a change of perspective, the proposed performance prediction methods are applied at the transmitter, which seeks to attain a target frame error rate (FER) either by adaptive power control or by adaptive modulation and coding (AMC). The performance prediction scheme utilises the statis
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Huang, Jinliang. "Adaptation in multiple input multiple output systems with channel state information at transmitter." Licentiate thesis, Stockholm : Institutionen för elektronik, dator- och programvarusystem, Kungliga tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4443.

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9

FALCÃO, Marcos Rocha de Moraes. "Channel reservation and spectrum adaptation strategies in a multi-level prioritized cognitive radio network." Universidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/21070.

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Submitted by Fabio Sobreira Campos da Costa (fabio.sobreira@ufpe.br) on 2017-08-31T16:03:41Z No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) MRMF_Thesis_Final_CD_Version3.pdf: 3129698 bytes, checksum: 37511a4c0f65db8ca937f0c87d309dcc (MD5)<br>Made available in DSpace on 2017-08-31T16:03:41Z (GMT). No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) MRMF_Thesis_Final_CD_Version3.pdf: 3129698 bytes, checksum: 37511a4c0f65db8ca937f0c87d309dcc (MD5) Previous issue date: 2016-07-29<br>CAPES<br>Wireless t
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10

Pollitte, Wesley Alan. "The effect of vertical networks on channel governance adaptation a transaction cost economics approach /." Diss., Connect to online resource - MSU authorized users, 2008.

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11

Palapelas, Kantola Philip. "Extreme Quantile Estimation of Downlink Radio Channel Quality." Thesis, Linköpings universitet, Artificiell intelligens och integrerade datorsystem, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-177657.

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The application area of Fifth Generation New Radio (5G-NR) called Ultra-Reliable and Low-Latency Communication (URLLC) requires a reliability, the probability of receiving and decoding a data packet correctly, of 1 - 10^5. For this requirement to be fulfilled in a resource-efficient manner, it is necessary to have a good estimation of extremely low quan- tiles of the channel quality distribution, so that appropriate resources can be distributed to users of the network system.  This study proposes and evaluates two methods for estimating extreme quantiles of the downlink channel quality distrib
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ITAKURA, Fumitada, Kazuya TAKEDA, Katsunobu ITOU, and Weifeng LI. "Single-Channel Multiple Regression for In-Car Speech Enhancement." Institute of Electronics, Information and Communication Engineers, 2006. http://hdl.handle.net/2237/15051.

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13

Yücek, Tevfik. "Channel, spectrum, and waveform awareness in OFDM-based cognitive radio systems." Scholar Commons, 2007. http://scholarcommons.usf.edu/etd/2425.

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The radio spectrum is becoming increasingly congested everyday with emerging technologies and with the increasing number of wireless devices. Considering the limited bandwidth availability, accommodating the demand for higher capacity and data rates is a challenging task, requiring innovative technologies that can offer new ways of exploiting the available radio spectrum. Cognitive radio arises to be a tempting solution to the spectral crowding problem by introducing the notion of opportunistic spectrum usage. Because of its attractive features, orthogonal frequency division multiplexing (OFDM
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Cavalcanti, de Castro Marcel. "Enhancing P2P Systems over Wireless Mesh Networks." Doctoral thesis, Karlstads universitet, Avdelningen för datavetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-8691.

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Due to its ability to deliver scalable and fault-tolerant solutions, applications based on the peer-to-peer (P2P) paradigm are used by millions of users on the internet. Recently, wireless mesh networks (WMNs) have attracted a lot of interest from both academia and industry, because of their potential to provide flexible and alternative broadband wireless internet connectivity. However, due to various reasons such as unstable wireless link characteristics and multi-hop forwarding operation, the performance of current P2P systems is rather low in WMNs. This dissertation studies the technologica
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15

Perez, Moreno Kevin. "A study of the system impact from different approaches to link adaptation in WLAN." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200124.

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The IEEE 802.11 standards define several transmission rates that can be used at the physical layer to adapt the transmission rate to channel conditions. This dynamic adaptation attempts to improve the performance in Wireless LAN (WLAN) and hence can have impact on the Quality of Service (QoS) perceived by the users. In this work we present the design and implementation of several new link adaptation (LA) algorithms. The performance of the developed algorithms is tested and compared against some existing algorithms such as Minstrel as well as an ideal LA. The evaluation is carried out in a netw
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Minack, Enrico. "Evaluation of the influence of channel conditions on Car2X Communication." Master's thesis, Universitätsbibliothek Chemnitz, 2005. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200501571.

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The C2X Communication is of high interest to the automotive industry. Ongoing research on this topic mainly bases on the simulation of Vehicular Ad Hoc Networks. In order to estimate the necessary level of simulation details their impact on the results needs to be examined. This thesis focuses on different channel models as the freespace, shadowing, and Ricean model, along with varying parameters. For these simulations the network simulator ns-2 is extended to provide IEEE 802.11p compliance. However, the WAVE mode is not considered since it is still under development and not finally approved.
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17

McClintick, Kyle W. "Training Data Generation Framework For Machine-Learning Based Classifiers." Digital WPI, 2018. https://digitalcommons.wpi.edu/etd-theses/1276.

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In this thesis, we propose a new framework for the generation of training data for machine learning techniques used for classification in communications applications. Machine learning-based signal classifiers do not generalize well when training data does not describe the underlying probability distribution of real signals. The simplest way to accomplish statistical similarity between training and testing data is to synthesize training data passed through a permutation of plausible forms of noise. To accomplish this, a framework is proposed that implements arbitrary channel conditions and base
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18

Feldman, Chris R. "Evolutionary Genetics of Tetrodotoxin (TTX) Resistance in Snakes: Tracking a Feeding Adaptation from Populations Through Clades." DigitalCommons@USU, 2008. https://digitalcommons.usu.edu/etd/159.

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Understanding the nature of adaptive evolution has been the recent focus of research detailing the genetic basis of adaptation and theoretical work describing the mechanics of adaptive evolution. Nevertheless, key questions regarding the process of adaptive evolution remain. Ultimately, a detailed description of the ecological context, evolutionary history, and genetic basis of adaptations is required to advance our understanding of adaptive evolution. To address some of the contemporary issues surrounding adaptive evolution, I examine phenotypic and genotypic changes in a snake feeding ada
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19

Moreira, Darlan Cavalcante. "EstratÃgias de EstimaÃÃo de Canal para AdaptaÃÃo de Enlace em Sistemas MIMO-OFDM." Universidade Federal do CearÃ, 2006. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=2095.

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FundaÃÃo de Amparo à Pesquisa do Estado do CearÃ<br>Atualmente a internet à uma ferramenta largamente utilizada e o grande desenvolvimentoe popularidade de tecnologias de acesso sem-fio (wireless) nos levam a um futuro no qual uma conexÃo caracterizada por estar disponÃvel âanytime, anywhereâ, ou seja, a qualquer hora e em qualquer lugar, serà essencial. Tal caracterÃstica à considerada obrigatÃria em sistemas4G (quarta geraÃÃo), mas para uma experiÃncia satisfatÃria para o usuÃrio à necessÃrio que uma conexÃo segura e eficiente esteja disponÃvel. A fim de obter tal eficiÃncia, a comunidade de
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20

Güvenç, İsmail. "Towards practical design of impulse radio ultrawideband systems: Parameter estimation and adaptation, interference mitigation, and performance analysis." Scholar Commons, 2006. http://scholarcommons.usf.edu/etd/2541.

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Ultrawideband (UWB) is one of the promising technologies for future short-range high data rate communications (e.g. for wireless personal area networks) and longer range low data rate communications (e.g. wireless sensor networks).Despite its various advantages and potentials (e.g. low-cost circuitry, unlicensed reuse of licensed spectrum, precision ranging capability etc.), UWB also has its own challenges. The goal of this dissertation is to identify and address some of those challenges, and provide a framework for practical UWB transceiver design.In this dissertation, various modulation opti
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21

Nellis, Shelley. "EFFECTS OF ALTERNATIVE PREY AS A BUFFER TO PREDATION OF CHANNEL CATFISH (ICTALURUS PUNCTATUS) BY LARGEMOUTH BASS (MICROPTERUS SALMOIDES)." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/129.

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Channel catfish have pectoral spines that lock to defend against gape-limited predators such as largemouth bass. Previous work indicated that spines increase survival of channel catfish exposed to bass but did not determine whether bass avoid catfish if less dangerous species are available. We presented bass with channel catfish and two alternatives, bluegill and goldfish, and compared order of ingestion, ingestion time, percent of successful strikes, and time spent chasing each prey species. We also presented the three species in a jar study that standardized position in the water column a
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22

Tran, Tuyen X. "Achievable Rate and Capacity of Amplify-and-Forward Multi-Relay Networks with Channel State Information." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1376743091.

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23

Atzori, Pamela. "Crossing the channel(s) : adaptation, national identity and public service broadcasting in the work of Charles Dickens on Spanish, French and Italian television, 1962-1970." Thesis, Aberystwyth University, 2011. http://hdl.handle.net/2160/72e8d458-8aaa-4e3f-8904-087df34ae35c.

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This thesis presents a cross-national comparison of Charles Dickens’s television adaptations produced across Western Europe (specifically by national broadcasters in France, Italy and Spain) with particular reference to the Public Service Broadcasting era. This was an important period for the development of European television and the reaffirmation of values linked to national identity after the events of World War Two. The thesis suggests that television adaptations contributed to the consolidation of forms of national identity in Western Europe, with each country applying its own version of
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24

Rao, Raghunandan M. "Perspectives of Jamming, Mitigation and Pattern Adaptation of OFDM Pilot Signals for the Evolution of Wireless Networks." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/77485.

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Wireless communication networks have evolved continuously over the last four decades in order to meet the traffic and security requirements due to the ever-increasing amount of traffic. However this increase is projected to be massive for the fifth generation of wireless networks (5G), with a targeted capacity enhancement of 1000× w.r.t. 4G networks. This enhanced capacity is possible by a combination of major approaches (a) overhaul of some parts and (b) elimination of overhead and redundancies of the current 4G. In this work we focus on OFDM reference signal or pilot tones, which are used fo
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25

Rao, Raghunandan M. "Enhancing Performance of Next-Generation Vehicular and Spectrum Sharing Wireless Networks: Practical Algorithms and Fundamental Limits." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/99796.

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Over the last few decades, wireless networks have morphed from traditional cellular/wireless local area networks (WLAN), into a wide range of applications, such as the Internet-of-Things (IoT), vehicular-to-everything (V2X), and smart grid communication networks. This transition has been facilitated by research and development efforts in academia and industry, which has resulted in the standardization of fifth-generation (5G) wireless networks. To meet the performance requirements of these diverse use-cases, 5G networks demand higher performance in terms of data rate, latency, security, and re
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26

Ning, Baozhu. "Performance Analysis of Iterative Soft Interference Cancellation Algorithms and New Link Adaptation Strategies for Coded MIMO Systems." Thesis, Supélec, 2013. http://www.theses.fr/2013SUPL0034/document.

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Les systèmes de communication sans fil actuels évoluent vers un renforcement des réactivités des protocles de la gestion des ressources radio (RRM) et adaptation du lien radipe (FLA) afin d'optimiser conjointement les couches MAC et PHY. En parallèle, la technologie d'antenne multiples et turbo récepteurs avancés ont un grand potentiel pour augmenter l’efficacité spectrale dans les futurs systèmes de communication sans fil. Ces deux tendances, à savoir, l'optimisation inter couche et le traitement de turbo, nécessitent le développement de nouvelles abstractions de la couche PHY (aussi appelée
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Abdeddaim, Mohamed Nazim. "Analyse des performances d'un réseau de capteurs exploitant le standard IEEE 802.15.4." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENM067/document.

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Les réseaux de capteurs suscitent un engouement croissant du fait du grand nombre d'applications mais également des défis inhérents à ce genre de réseaux. Le standard IEEE 802.15.4 a été proposé afin de standardiser les couches physique et MAC. Dans ce travail nous avons dans un premier temps proposé une variante multi-canal pour le standard 802.15.4 permettant de résoudre le problème de collisions de supertrames. Pour cela nous proposons de construire un réseau en arbre avec la particularité que chaque cellule du réseau utilise un canal différent permettant ainsi une réduction conséquente des
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28

Cui, DongBo. "Muscarinic Cholinergic Modulation of Neuronal Excitability and Dynamics via Ether-a-go-go-Related Gene Potassium Channel in Rodent Neocortical Pyramidal Cells." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1559904265174505.

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29

Banerjee, Debashis. "Intelligent real-time environment and process adaptive radio frequency front-ends for ultra low power applications." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53882.

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In the thesis the design of process tolerant, use-aware radio-frequency front-ends were explored. First, the design of fuzzy logic and equation based controllers, which can adapt to multi-dimensional channel conditions, are proposed. Secondly, the thesis proves that adaptive systems can have multiple modes of operation depending upon the throughput requirements of the system. Two such modes were demonstrated: one optimizing the energy-per-bit (energy priority mode) and another achieving the lowest power consumption at the highest throughput (data priority mode). Finally, to achieve process tol
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Mhamdi, Maroua. "Méthodes de transmission d'images optimisées utilisant des techniques de communication numériques avancées pour les systèmes multi-antennes." Thesis, Poitiers, 2017. http://www.theses.fr/2017POIT2281/document.

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Cette thèse est consacrée à l'amélioration des performances de codage/décodage de systèmes de transmission d'images fixes sur des canaux bruités et réalistes. Nous proposons, à cet effet, le développement de méthodes de transmission d'images optimisées en se focalisant sur les deux couches application et physique des réseaux sans fil. Au niveau de la couche application et afin d'assurer une bonne qualité de service, on utilise des algorithmes de compression efficaces permettant au récepteur de reconstruire l'image avec un maximum de fidélité (JPEG2000 et JPWL). Afin d'assurer une transmission
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Spires, Meggan Hazel. "Barriers to and enablers of climate change adaptation in four South African municipalities, and implications for community based adaptation." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1018913.

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The focus of this study is on understanding the multiple and interacting factors that hinder or enable municipal planned climate change adaptation, here called barriers and enablers respectively, and their implications for community based adaptation. To do this I developed a conceptual framework of barriers to and enablers of planned climate change adaptation, which informed a systematic literature review of barriers to planned community based adaptation in developing countries. In this framework barriers were grouped into resource, social and physical barriers. I then conducted empirical case
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32

Lamire, Mohammed. "Adaptation de groupements tetraedriques xo4 aux edifices octaedriques : etude structurale des deformations de la charpente et des possibilites d'insertion cationique." Caen, 1987. http://www.theses.fr/1987CAEN2035.

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Plusieurs types structuraux ont servi de base aux investigations. Dans chaque cas, un compose nouveau a ete synthetise et sa structure etablie par diffraction rx : pwo::(5), bronze monophosphate a tunnels pentagonaux; na::(x)p::(4)w::(14)o::(50), bronze monophosphate a tunnels hexagonaux; ba::(2)p::(8)w::(32)o::(112), bronze diphosphate a tunnels hexagonaux; rb::(x)p::(8)w::(8)o::(40), bronze diphosphate a tunnels octagonaux et deux formes de mo::(4)p::(6)si::(2)o::(25), silicophosphate. La description des coordinences, les calculs de potentiels de sites et l'ecoulement de ces proprietes au se
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Rey, Micolau Francesc. "Feedback-Channel and adaptative mimo coded-modulations." Doctoral thesis, Universitat Politècnica de Catalunya, 2006. http://hdl.handle.net/10803/6899.

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En els sistemes de comunicacions on el transmissor disposa de certa informació sobre l'estat del canal (CSI), es possible dissenyar esquemes lineals de precodificació que assignin la potència de manera òptima induint guanys considerables, sigui en termes de capacitat, sigui en termes de la fiabilitat de l'enllaç de comunicacions. A la pràctica, aquest coneixement del canal mai és perfecte i, per tant, el senyal transmès es veurà degradat degut al desajust entre la informació que el transmissor disposi del canal i el seu estat real.<br/><br/>En aquest context, aquesta tesi estudia dos probleme
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Collins, Sinead. "Microalgal adaptation to changes in carbon dioxide." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=100340.

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It is generally accepted that global levels of CO2 will roughly double over the next century. Because of their large population sizes and fast generation times, microalgae may adapt to global change through novel mutations fixed by natural selection, such that future populations may be genetically different from contemporary ones. The prediction that microalgae may respond evolutionarily to rising CO2 was tested using populations of Chlamydomonas reinhardtii grown for 1000 generations at increasing CO2. Laboratory populations grown at high CO2 did not show a direct response to selection at ele
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Siketina, Natalya Hennadievna. "Adaptation industrial enterprises to changed competitive environment." Thesis, Science initiative "Universum", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/39997.

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Competitive environment results in positive changes in market agents' relations. At the same time, it is characterized by constant, often unpredictable, changes in the conditions of their existence, which, for one, positively affects production activity, while others have a negative impact on efficiency, often leading them to bankruptcy. These features of the competitive environment require the identification of the mechanism of adaptation of enterprises to its changes, namely, the reengineering of the internal environment of the enterprise, in accordance with the variability of external econo
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BONAVENTURA, Rosario Emanuele. "NEUROPLASTIC AND BEHAVIORAL CHANGES FOLLOWING PRISM ADAPTATION." Doctoral thesis, Università degli Studi di Palermo, 2022. https://hdl.handle.net/10447/548778.

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Prismatic or Prism adaptation (PA) is a particular visuomotor procedure that through the deviation of visual field and a motor task influences brain activity (Redding & Wallace, 2006). Initially developed 1998, when Rossetti et al. study showed an improvement of neglected hemispace exploring emineglected stroke patients, the number of studies focused on PA was greatly increased. The PA effects were investigated in healthy subjects as well as in patients in different tasks targeting different cognitive functions. A large number of applications of PA procedure was developed in the different st
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Duroselle, Raphaël. "Robustesse au canal des systèmes de reconnaissance de la langue." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0250.

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La tâche de reconnaissance de la langue consiste à prédire la langue utilisée dans un énoncé audio contenant de la parole. Depuis 2017, les systèmes atteignant les meilleures performances reposent sur un réseau de neurones profond, entraîné à identifier la langue pour l’ensemble du segment. Ces systèmes subissent une perte de performance lorsqu’ils sont exposés à une variation des canaux de transmission entre les données d’entraînement et d’évaluation. L’objet de cette thèse est l’exploration d’approches permettant de limiter cette perte de performance dans le cadre de ces nouveaux systèmes. N
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Gilster, Elisabeth 1955. "Communication strategies and behavioral adaptations in intercultural channels." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/290671.

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Although international business-to-business marketing is pervasive, little systematic empirical work has been conducted on face-to-face interactions between channel members from different cultures. Greater knowledge regarding cross-cultural communication strategies (e.g. verbal and non-verbal language choices) and behavioral adaptations (e.g. rapport building, increased flexibility with timing, and contractual format) will enhance the strength, efficiency and longevity of relationships between channel partners from distinct cultures. More importantly, a lack of this knowledge seriously jeopard
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Nosakhare, Ehimwenma. "QT-interval adaptation to changes in autonomic balance." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/84865.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 93-98).<br>ECG variability, as it relates to the influence of the autonomic nervous system on the heart, is primarily studied via frequency-domain and time-domain analysis of heart rate variability (HRV). HRV studies the variability of the RR intervals in the ECG; these intervals are modulated by the autonomic influence on the periodicity of the the heart's pacemaker, the sino-atrial node. The au
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MACRI', CARMELO NICODEMO. "Adaptations of plant species to environmental changes." Doctoral thesis, Università degli studi di Genova, 2020. http://hdl.handle.net/11567/1003150.

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The future climate change represents the biggest challenge for plant and animal species. The scenarios forecasted by the IPCC predict a global increase in temperatures and regional changes in rainfall during this century. Therefore, studying the relationship between climate and several traits of species is crucial in our understanding of the effects that future changes may have on plants. Species growing along a wide environmental gradient are a suitable study model to verify the relationship between intraspecific variability and both current and future climate. The aim of my PhD project is to
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Childs, Margaret Mary. "Teacher adaptation of a curriculum during implementation." Thesis, Nelson Mandela Metropolitan University, 2005. http://hdl.handle.net/10948/377.

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The purpose of this study is to investigate to what extent foundation phase teachers adapt Curriculum 2005. The study was guided by two research questions: (1) What are the critical components of Curriculum 2005 (foundation phase)? (2) What are the adaptations that teachers have made in teaching this curriculum? The specific focus of this study is foundation phase teachers’ initial implementation of the revised version of Curriculum 2005, the Revised National Curriculum Statement (RNCS). An Innovation Configuration Checklist was developed identifying the critical components of the RNCS and the
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Dimou, Konstantinos. "Améliorations de l'accès paquet en sens montant du WCDMA." Phd thesis, Télécom ParisTech, 2003. http://pastel.archives-ouvertes.fr/pastel-00000671.

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Les systèmes de 3G offrent de nouveaux services support (bearer services) à plus hauts débits pour les modes de transmission "paquet". Ces services vont coexister avec la voix (ou d'autres services temps réels), des scénarios de trafic mixte, voix et données, doivent être envisagés. La norme UMTS permet effectivement aux utilisateurs d'avoir plus d'un service activé simultanément. Les différentes classes de trafic augmentent la complexité de la gestion des ressources radios. Dans ce contexte, deux types de fonctions sont étudiés: l'allocation de TFCI et l'ordonnancement de paquets. Leur impact
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Ajayi, Idowu Iseoluwa. "Enhanced Physical Layer Security through Frequency and Spatial Diversity." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS227.

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La sécurité de la couche physique (PLS) est un paradigme émergent qui se concentre sur l'utilisation des propriétés de la communication sans fil, telles que le bruit, l'évanouissement, la dispersion, l'interférence, la diversité, etc. pour assurer la sécurité entre les utilisateurs légitimes en présence d'un espion. Comme le PLS utilise des techniques de traitement du signal et de codage, il intervient au niveau de la couche physique et peut donc garantir le secret quelle que soit la puissance de calcul de l'espion. Cela en fait une approche intéressante pour compléter la cryptographie traditi
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Hubeika, Valiantsina. "Intersession Variability Compensation in Language and Speaker Identification." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2008. http://www.nusl.cz/ntk/nusl-235432.

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Variabilita kanálu a hovoru je velmi důležitým problémem v úloze rozpoznávání mluvčího. V současné době je ve velkém množství vědeckých článků uvedeno několik technik pro kompenzaci vlivu kanálu. Kompenzace vlivu kanálu může být implementována jak v doméně modelu, tak i v doménách příznaků i skóre. Relativně nová výkoná technika je takzvaná eigenchannel adaptace pro GMM (Gaussian Mixture Models). Mevýhodou této metody je nemožnost její aplikace na jiné klasifikátory, jako napřílad takzvané SVM (Support Vector Machines), GMM s různým počtem Gausových komponent nebo v rozpoznávání řeči s použití
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Guobaitis, Vincent Michael. "An analysis of state efforts on adaptation to climate change in the transportation sector with applications to Georgia." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42905.

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With climate change arising as an important issue in the 21th century, many states have been working diligently to develop climate action plans with the hopes of reducing greenhouse gas emissions and stop climate change from occurring. According to scientists' theories, however, many places across the globe are already feeling the effects of a changing climate and must therefore switch their focus from mitigation to adaptation. In the United States, there has been a focus on how climate change will impact one of the most vulnerable parts of the country, the transportation infrastructure. Many
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Breslin, Catherine J. "Explorations of neurobiology with analogue integrated circuits : ion channels and intraneuronal adaptation." Thesis, University of Edinburgh, 1998. http://hdl.handle.net/1842/12758.

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One method for exploring neurobiology is to build analogue integrated, circuits which are then used as models for developing and testing theories of the brain. The original motivation for the use of analogue integrated circuits was the concept of a physical equivalence between field-effect transistors operating in the weak-inversion region and ion channels permitting ion conductance through the neuronal membrane. The concept of physical equivalence is examined, with respect to both the physical processes occurring in ion channels and transistors and the equivalences that can be found between n
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Rodriguez, Osuna Andrea. "Adaptation Funding to Climate Changeunder the Global Environment Facility : An Analysis of Bolivia’s Adaptation Project." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-150785.

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Adaptation finance has recently become an essential component to address internationalclimate change impacts. The Global Environment Facility (GEF) is the main mechanismproviding financial adaptation assistance from developed to developing countries. Underthis mechanism, Bolivia figures as the country with more projects than any other eligiblecountry, giving the impression that Bolivia receives favourable treatment when resourcesare allocated. This study analyzes the process by which Bolivia receives funding foradaptation projects using the principle of good governance and elements of accounta
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Nanduri, Chandra Sekhara Srinivas. "Platform business models : incumbent adaptation perspectives subsequent to discontinuous changes." Diss., University of Pretoria, 2020. http://hdl.handle.net/2263/80492.

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This thesis explored the impact of platforms on South African Banking, Telecom and Media industries, studying how the industry competes or collaborates with the phenomenon. Thus far, research focuses on non-existential threats, which allowed for long-term adaptation and scant evidence about incumbent adaptation under discontinuous changes. This research looked at two key questions: (a) how discontinuous changes impact incumbents; and (b) how incumbents adapt their exploration and exploitation balance subsequent to discontinuous changes. A qualitative methodology was applied to answer these res
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Gruionu, Gabriel. "Structural adaptation of arcade arteries to changes in blood flow." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/280607.

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Arcades are blood vessels that form direct connections between two arteries or arterioles. Because they are supplied with blood from two sources, arcades can function as alternative flow pathways following obstruction of arteries or arterioles, as in coronary and peripheral vascular disease and stroke. In response to changes in blood flow or metabolic conditions, vascular networks undergo structural adaptation or remodeling, which includes structural changes of the existing vessels and growth of new vessels. Following obstruction of a blood supply, arcade vessels may adjust their internal diam
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Simpson, James Hightower. "Leadership Adaptation to Changes in Public Funding of Community Colleges." ScholarWorks, 2017. https://scholarworks.waldenu.edu/dissertations/3369.

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Although growth in U.S. community colleges has been exponential, a major challenge accompanying that growth has been the source of funding, which has consisted of shifting proportions of tuition, local taxes, and state aid. The shift away from state aid toward fundraising, profit-oriented research, sophisticated financing, and higher tuition presents challenges and unintended consequences. This shift could threaten the community college access mission and contribute to a perception of higher education as a private good rather than a public good. With a framework of academic capitalism and reso
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