Captaina : Integrated pronunciation practice and data collection portal

Peer reviewe

Saints and Sainthood around the Baltic Sea: Identity, Literacy, and Communication in the Middle Ages

This volume addresses the history of saints and sainthood in the Middle Ages in the Baltic Region with a special focus on the cult of saints in Russia, Prussia, Finland, Sweden, Denmark, Estonia, and Latvia (more commonly referred to in the Middle Ages as Livonia). The articles cover a wide range of topics, for example the introduction of foreign (and old ) saints into new regions, the creation of new local cults of saints in newly Christianized regions, the role of the cult of saints in the creation of political and lay identities, the adaption of the cult of saints in folk poetry, and the potential role of saints in times of war. The articles also address questions of methodology in research on the medieval cult of saints. Chronologically, the articles cover most of the Middle Ages from the Scandinavian Varangians in Rus in the tenth century to the late medieval Northern societies of the late fifteenth century.https://scholarworks.wmich.edu/mip_smemc/1000/thumbnail.jp

Byzantino-Nordica 2004 : papers presented at the international symposium of Byzantine studies held on 7-11 May 2004 in Tartu, Estonia

http://www.ester.ee/record=b2117510*es

A student's guide to Middle English

http://www.ester.ee/record=b1217973*es

Turunduspakkumiste edukus tulenevalt kliendi varasemast meelestatusest klienditeeninduses Euroopa telekomiettevõtte näitel

https://www.ester.ee/record=b5262242*es

Multifunction Radios and Interference Suppression for Enhanced Reliability and Security of Wireless Systems

Wireless connectivity, with its relative ease of over-the-air information sharing, is a key technological enabler that facilitates many of the essential applications, such as satellite navigation, cellular communication, and media broadcasting, that are nowadays taken for granted. However, that relative ease of over-the-air communications has significant drawbacks too. On one hand, the broadcast nature of wireless communications means that one receiver can receive the superposition of multiple transmitted signals. But on the other hand, it means that multiple receivers can receive the same transmitted signal. The former leads to congestion and concerns about reliability because of the limited nature of the electromagnetic spectrum and the vulnerability to interference. The latter means that wirelessly transmitted information is inherently insecure. This thesis aims to provide insights and means for improving physical layer reliability and security of wireless communications by, in a sense, combining the two aspects above through simultaneous and same frequency transmit and receive operation. This is so as to ultimately increase the safety of environments where wireless devices function or where malicious wirelessly operated devices (e.g., remote-controlled drones) potentially raise safety concerns. Specifically, two closely related research directions are pursued. Firstly, taking advantage of in-band full-duplex (IBFD) radio technology to benefit the reliability and security of wireless communications in the form of multifunction IBFD radios. Secondly, extending the self-interference cancellation (SIC) capabilities of IBFD radios to multiradio platforms to take advantage of these same concepts on a wider scale. Within the first research direction, a theoretical analysis framework is developed and then used to comprehensively study the benefits and drawbacks of simultaneously combining signals detection and jamming on the same frequency within a single platform. Also, a practical prototype capable of such operation is implemented and its performance analyzed based on actual measurements. The theoretical and experimental analysis altogether give a concrete understanding of the quantitative benefits of simultaneous same-frequency operations over carrying out the operations in an alternating manner. Simultaneously detecting and jamming signals specifically is shown to somewhat increase the effective range of a smart jammer compared to intermittent detection and jamming, increasing its reliability. Within the second research direction, two interference mitigation methods are proposed that extend the SIC capabilities from single platform IBFD radios to those not physically connected. Such separation brings additional challenges in modeling the interference compared to the SIC problem, which the proposed methods address. These methods then allow multiple radios to intentionally generate and use interference for controlling access to the electromagnetic spectrum. Practical measurement results demonstrate that this effectively allows the use of cooperative jamming to prevent unauthorized nodes from processing any signals of interest, while authorized nodes can use interference mitigation to still access the same signals. This in turn provides security at the physical layer of wireless communications