Global ETD Search

41	Tribal Selves: Subversive Identity in Asian American and Native American Literature Suzuki-Martinez, Sharon S., 1963- January 1996 (has links) No description available.
42	Performance analysis of spectrum sensing techniques for cognitive radio systems Gismalla Yousif, Ebtihal January 2013 (has links) Cognitive radio is a technology that aims to maximize the current usage of the licensed frequency spectrum. Cognitive radio aims to provide services for license-exempt users by making use of dynamic spectrum access (DSA) and opportunistic spectrum sharing strategies (OSS). Cognitive radios are defined as intelligent wireless devices capable of adapting their communication parameters in order to operate within underutilized bands while avoiding causing interference to licensed users. An underused band of frequencies in a specific location or time is known as a spectrum hole. Therefore, in order to locate spectrum holes, reliable spectrum sensing algorithms are crucial to facilitate the evolution of cognitive radio networks. Since a large and growing body of literature has mainly focused into the conventional time domain (TD) energy detector, throughout this thesis the problem of spectrum sensing is investigated within the context of a frequency domain (FD) approach. The purpose of this study is to investigate detection based on methods of nonparametric power spectrum estimation. The considered methods are the periodogram, Bartlett's method, Welch overlapped segments averaging (WOSA) and the Multitaper estimator (MTE). Another major motivation is that the MTE is strongly recommended for the application of cognitive radios. This study aims to derive the detector performance measures for each case. Another aim is to investigate and highlight the main differences between the TD and the FD approaches. The performance is addressed for independent and identically distributed (i.i.d.) Rayleigh channels and the general Rician and Nakagami fading channels. For each of the investigated detectors, the analytical models are obtained by studying the characteristics of the Hermitian quadratic form representation of the decision statistic and the matrix of the Hermitian form is identified. The results of the study have revealed the high accuracy of the derived mathematical models. Moreover, it is found that the TD detector differs from the FD detector in a number of aspects. One principal and generalized conclusion is that all the investigated FD methods provide a reduced probability of false alarm when compared with the TD detector. Also, for the case of periodogram, the probability of sensing errors is independent of the length of observations, whereas in time domain the probability of false alarm is increased when the sample size increases. The probability of false alarm is further reduced when diversity reception is employed. Furthermore, compared to the periodogram, both Bartlett method and Welch method provide better performance in terms of lower probability of false alarm but an increased probability of detection for a given probability of false alarm. Also, the performance of both Bartlett's method and WOSA is sensitive to the number of segments, whereas WOSA is also sensitive to the overlapping factor. Finally, the performance of the MTE is dependent on the number of employed discrete prolate spheroidal (Slepian) sequences, and the MTE outperforms the periodogram, Bartlett's method and WOSA, as it provides the minimal probability of false alarm.
43	Analýza ROC křivek zvukových signálů a jejich srovnání / Analysis and comparison of ROC curves of audio signals Pospíšil, Lukáš January 2017 (has links) This thesis deals with oportunity of ROC curve usage in the description of methods that work with sound signals. Specifically, it focuses on ways of detecting of stress in speech signals. The detection itselfs is done in a range of frequencies of the sound signal. There is also a classifier designed using ROC curves that decides whether the input signal is stressed or not. The output of this thesis are findings gathered from analyses and also some recommendation based on those analyses.
44	Radio Religion: War, Faith and the BBC, 1939-1948 Elias, Hannah January 2016 (has links) This thesis offers an important reconsideration of the place of the Second World War within larger narratives of religious change in the twentieth century. While many scholars have subsumed these crucial war years within accounts of inter-war change, or dismissed them as a period of mellow or austere religion, the Second World War provides a significant opportunity for an analysis of religious change that relies on a confluence of vectors. International geopolitics, political consensus, myths of national cohesion, physical constraints, technological developments and currents in ecclesiastical thought each played a role in shaping the religious culture of wartime, one that the author describes as a “spiritual consensus” that prized unity and commonality over difference. This thesis also opens up an important new front for the history of modern Christianity in Britain. The relationship between mass media, religion and national culture has been under-examined by scholars, as has the particular ways that media shapes mental environments. The relationship between the Churches and the Ministry of Information seems to have sat in a penumbra between disciplines, leaving the rich trove of documents at the National Archives about the activities of the Religions Division of the MOI relatively unexamined. This thesis discusses in detail the global and domestic role afforded to an ecumenical Christianity in MOI propaganda. It also adds to existing scholarship that has emphasised the significant place afforded to Christianity in identity construction during the war, and its importance in the articulation of the narratives through which the urgency and necessity of the conflict was understood. / This is a study of the British Broadcasting Corporation’s religious broadcasting practices during the Second World War and its aftermath. Using documentary sources from the BBC Written Archives Centre and the National Archives, this thesis argues that the wartime context allowed the articulation and development of a particular kind of “BBC Religion,” one that celebrated commonality over difference, emphasized the importance of accessibility, and focused on individual rather than communal worship. BBC Religion was an important site of national propaganda and national identity construction, and was central to the celebration of key civil religious festivals, including the National Days of Prayer. BBC Religion provided listeners with daily prayers, devotionals, talks and entertainments to offer psychological and spiritual support during a time of crisis. Religion can be an effective tool of persuasion, particularly when propaganda builds on pre-existing beliefs and loyalties. The Ministry of Information and BBC used a generic, practical Christianity as an “ecumenical weapon” to foster unity in Britain and between Allies. This thesis argues that the medium of radio and the technological and physical constraints of war shaped the particular articulation of BBC Religion. While the BBC helped foster a “spiritual consensus” during the war, this consensus quickly degraded in the in the aftermath of the conflict. Instead, the BBC articulated principles of tolerance and liberty in a more straightforward way, celebrating the return of regional and religious diversity in radio programming. In 1948, the BBC broke with its former “ban on controversy” to allow Bertrand Russell to openly question the existence of God on the air for the first time. This study offers a revision to “caesura” and “gradual-declinist” narratives of religious change by suggesting that religious change in the mid-twentieth century may be more episodic in nature, and that current historiography would benefit from an approach that considers the formation, development and adaptation of multiple discursive Christianities. / Thesis / Doctor of Philosophy (PhD) / This is a study of the place of religion in British public life during the Second World War. The British Broadcasting Corporation (BBC) was tasked with creating popular, upbeat entertainment that could boost the morale of the nation while reminding listeners of the reasons to stay committed to the fight. They created a “BBC Religion” during the war, one that emphasised unity by stressing commonalities between all kinds of Christians, and offered psychological and spiritual comfort to listeners in a time of crisis. The Religious Broadcasting Department created engaging content that prized accessibility and simplicity above all, commissioning beloved programmes, including C.S. Lewis’s Mere Christianity, Dorothy L. Sayers’ The Man Born to be King, and Lift Up Your Hearts, a precursor to Radio 4’s Thought for the Day. When the urgency of the conflict passed and victory became assured, this BBC Religion ceased to serve a propagandistic function. Instead, the post-war BBC celebrated diversity and respected differences in religious belief and interpretation instead of forcing conformity. BBC (British Broadcasting Corporation) Radio World War II Religious Broadcasting Home Front British National Identity Propaganda Persuasion Faith Christianity Ecumenism Ministry of Information Spiritual Impact of War Wartime Media Wartime Experience Wartime Religion Global Broadcasting Religious Propaganda C.S. Lewis Dorothy L. Sayers William Temple James Welch William Haley British History Media History Religious History 1939-1948 Religious Cooperation
45	Enhanching the Human-Team Awareness of a Robot Wåhlin, Peter January 2012 (has links) The use of autonomous robots in our society is increasing every day and a robot is no longer seen as a tool but as a team member. The robots are now working side by side with us and provide assistance during dangerous operations where humans otherwise are at risk. This development has in turn increased the need of robots with more human-awareness. Therefore, this master thesis aims at contributing to the enhancement of human-aware robotics. Specifically, we are investigating the possibilities of equipping autonomous robots with the capability of assessing and detecting activities in human teams. This capability could, for instance, be used in the robot's reasoning and planning components to create better plans that ultimately would result in improved human-robot teamwork performance. we propose to improve existing teamwork activity recognizers by adding intangible features, such as stress, motivation and focus, originating from human behavior models. Hidden markov models have earlier been proven very efficient for activity recognition and have therefore been utilized in this work as a method for classification of behaviors. In order for a robot to provide effective assistance to a human team it must not only consider spatio-temporal parameters for team members but also the psychological.To assess psychological parameters this master thesis suggests to use the body signals of team members. Body signals such as heart rate and skin conductance. Combined with the body signals we investigate the possibility of using System Dynamics models to interpret the current psychological states of the human team members, thus enhancing the human-awareness of a robot. / Användningen av autonoma robotar i vårt samhälle ökar varje dag och en robot ses inte längre som ett verktyg utan som en gruppmedlem. Robotarna arbetar nu sida vid sida med oss och ger oss stöd under farliga arbeten där människor annars är utsatta för risker. Denna utveckling har i sin tur ökat behovet av robotar med mer människo-medvetenhet. Därför är målet med detta examensarbete att bidra till en stärkt människo-medvetenhet hos robotar. Specifikt undersöker vi möjligheterna att utrusta autonoma robotar med förmågan att bedöma och upptäcka olika beteenden hos mänskliga lag. Denna förmåga skulle till exempel kunna användas i robotens resonemang och planering för att ta beslut och i sin tur förbättra samarbetet mellan människa och robot. Vi föreslår att förbättra befintliga aktivitetsidentifierare genom att tillföra förmågan att tolka immateriella beteenden hos människan, såsom stress, motivation och fokus. Att kunna urskilja lagaktiviteter inom ett mänskligt lag är grundläggande för en robot som ska vara till stöd för laget. Dolda markovmodeller har tidigare visat sig vara mycket effektiva för just aktivitetsidentifiering och har därför använts i detta arbete. För att en robot ska kunna ha möjlighet att ge ett effektivt stöd till ett mänskligtlag måste den inte bara ta hänsyn till rumsliga parametrar hos lagmedlemmarna utan även de psykologiska. För att tyda psykologiska parametrar hos människor förespråkar denna masteravhandling utnyttjandet av mänskliga kroppssignaler. Signaler så som hjärtfrekvens och hudkonduktans. Kombinerat med kroppenssignalerar påvisar vi möjligheten att använda systemdynamiksmodeller för att tolka immateriella beteenden, vilket i sin tur kan stärka människo-medvetenheten hos en robot. / <p>The thesis work was conducted in Stockholm, Kista at the department of Informatics and Aero System at Swedish Defence Research Agency.</p> robotics Artificial Intelligence AI System Dynamics Wireless Body Area Network WBAN sensors Psychology physiology human behavior Human-Robot-Interaction HRI robot Human-Team awareness human-robot RapidMiner Vensim JaHMM hidden markov models HMM eclipse rcp ARFF recognizer classification cross-validation human behavior stress detection Galvanic Skin Response Heart Rate Skin Temperature Finger Temperature Electrocardiogram ECG GSR ST Pupil Diameter PD Patient monitoring GPS Data acquisition dataset data set MODERE Yerkes-Dodson SD model SD Confusion matrix spatial MOUT Java Agent robotic agent Machine Learning activity recognition team oriented robot Evaluation Decoding Learning Forward Algorithm Backward Algorithm Baum-Welch feedback loop Situation Awareness SA Shared Mental Models SMM
46	Changing fictions of masculinity : adaptations of Jane Eyre and Wuthering Heights, 1939-2009 Fanning, Sarah Elizabeth January 2012 (has links) The discursive and critical positions of the ‘classic’ nineteenth-century novel, particularly the woman’s novel, in the field of adaptation studies have been dominated by long-standing concerns about textual fidelity and the generic processes of the text-screen transfer. The sociocultural patterns of adaptation criticism have also been largely ensconced in representations of literary women on screen. Taking a decisive twist from tradition, this thesis traces the evolution of representations of masculinity in the malleable characters of Rochester and Heathcliff in film and television adaptations of Charlotte Brontë’s Jane Eyre and Emily Brontë’s Wuthering Heights between 1939 and 2009. Concepts of masculinity have been a neglected area of enquiry in studies of the ‘classic’ novel on screen. Adaptations of the Brontës’ novels, as well as the adapted novels of other ‘classic’ women authors such as Jane Austen, George Eliot and Elizabeth Gaskell, increasingly foreground male character in traditionally female-oriented narratives or narratives whose primary protagonist is female. This thesis brings together industrial histories, textual frames and sociocultural influences that form the wider contexts of the adaptations to demonstrate how male characterisation and different representations of masculinity are reformulated and foregrounded through three different adaptive histories of the narratives of Jane Eyre and Wuthering Heights. Through the contours of the film and television industries, the application of text and context analysis, and wider sociocultural considerations of each period an understanding of how Rochester and Heathcliff have been transmuted and centralised within the adaptive history of the Brontë novel. 823

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