1,721,636 research outputs found
J. R. Hamilton, Alexander the Great
No full textHannick Jean-Marie. J. R. Hamilton, Alexander the Great. In: L'antiquité classique, Tome 43, fasc. 1, 1974. pp. 545-546
J. R. Hamilton, Alexander the Great
No full textHannick Jean-Marie. J. R. Hamilton, Alexander the Great. In: L'antiquité classique, Tome 43, fasc. 1, 1974. pp. 545-546
Resilient communications for underwater systems
No full textIn the rapidly evolving landscape of digital communications that defines our contemporary world, the imperative for resilient, secure, and distributed wireless systems has never been more crucial. Within the specific context of defence and security operations, the critical role of resilient, secure, and distributed wireless communications in fostering optimal situational awareness and facilitating information exchange cannot be overstated. This thesis introduces innovative novel approaches and solutions to address the intricate technical challenges inherent in tactical communications. These challenges are particularly pronounced in scenarios such as urban deployments or underwater acoustic communications. The diverse techniques presented in this work include a pioneering Joint Source Channel Coding scheme, a novel Log Likelihood Ratio (LLR)-based signal processing demodulation technique for M-ary Orthogonal Signalling, novel turbo-equalization techniques tailored to a NATO standard, integrated security within a high-performance physical layer for underwater communications, and pioneering approaches to the integration of communications and autonomy. These advancements ensure optimal resource utilisation while minimising environmental and operational impact. The robustness of several of the proposed solutions is evaluated through analysis and implementations in relevant scenario simulations. Real-world applicability and performance metrics are considered to validate the efficacy of the methodologies developed and their ultimate integration within existing defence and security frameworks
List of the indigenous plants of the Mudgee district / by Alexander G. Hamilton.
No full textCaption title.; In an unnamed journal (Proc. Linn. Soc. of N.S.W., 1887?).; Electronic reproduction. Canberra, A.C.T. : National Library of Australia, 2009
Covert communications with a full-duplex receiver in non-coherent Rayleigh fading
No full textIn a majority of research on covert communications, knowledge about channel state information (CSI) of main channel and/or warden channel is assumed to be known or partially known. However, a covert user may not afford to perform channel estimation in practice, and acquiring the warden's CSI is even impossible. In this paper, we investigate covert communications over non-coherent Rayleigh fading channels, in both i.i.d. fast fading and slow fading cases. We observe that the purpose of covert communication in many scenarios is to hide the existence of the sender, not the receiver. Therefore, we allow the receiver to work in full-duplex mode such that it can emit artificial noise (AN) while receiving signals simultaneously. We analyse the achievable covert rates with fixed and varying AN power and show that in both fast and slow fading cases, it is possible to achieve a positive covert rate. For the slow fading case, we further extend the proposed strategy to a multi-user scenario, in which multiple other users share the same spectral resource and cause interference at the warden. Extensive simulations are performed to verify the correctness of our analysis, which provide new insights on the AN design problem in non-coherent channels
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Hamilton (Alexander), Madison (James) and Jay (John). The Federalist or the New Constitution. Edited with an introduction and notes by Beloff (Max)
No full textDe Visscher P. Hamilton (Alexander), Madison (James) and Jay (John). The Federalist or the New Constitution. Edited with an introduction and notes by Beloff (Max). In: Revue belge de philologie et d'histoire, tome 28, fasc. 3-4, 1950. pp. 1274-1277
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