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Abstract

Messina in the stories of Polish travelers over the course of centuries: the double face of the city – The article presents Messina’s ‘verbal postcards’ left by Polish participants in the Grand Tour and travelers who visited Sicily in later times. Travelers whose accounts are widely known, such as Anonymous (1595), Michał Borch, Julian Ursyn Niemcewicz, Chrystian Kamsetzer (XVIII c.), Zygmunt Krasiński (nineteenth century), but also less well-known ones such as writer Zofia Sokołowska, arriving in Sicily in the tragic year of the earthquake (1908), left descriptions from their stays in Messina about the emotional charge they felt, one closely related to the historical moment in which they arrived on the island. This will therefore be a thorough analysis of a fragment of the Sicilian journey concerning Messina left by some Polish travelers, taking into account their professions, areas of interest and the period in which they were in Sicily.
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Abstract

Recently, the topic of ontologies has growing attention from the IT community. Various processes of ontology creation, integration, and deployment have been proposed. As a consequence there appeared an urgent need for evaluating the resulting ontologies in a quantitative way. A number of metrics has been defined along with different approaches to measuring the properties of ontologies. In the first part of this paper we review the state of the art in this domain. Special attention is devoted to discussing differences between syntactic measures (referring to various properties of graphs that represent ontologies) and semantic measures (reflecting the properties of the space of ontology models). In the second part we propose an alternative approach to quantification of semantics of an ontology. The original proposal presented here exploits specific methods of representing the space of semantic models used for optimization of reasoning. We argue that this approach enables us to capture different kinds of relations among ontology terms and offers possibilities of devising new useful measures.
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Abstract

Recently, the topic of ontologies has growing attention from the IT community. Various processes of ontology creation, integration, and deployment have been proposed. As a consequence there appeared an urgent need for evaluating the resulting ontologies in a quantitative way. A number of metrics has been defined along with different approaches to measuring the properties of ontologies. In the first part of this paper we review the state of the art in this domain. Special attention is devoted to discussing differences between syntactic measures (referring to various properties of graphs that represent ontologies) and semantic measures (reflecting the properties of the space of ontology models). In the second part we propose an alternative approach to quantification of semantics of an ontology. The original proposal presented here exploits specific methods of representing the space of semantic models used for optimization of reasoning. We argue that this approach enables us to capture different kinds of relations among ontology terms and offers possibilities of devising new useful measures.
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Abstract

The paper is devoted to the strength analysis of a simply supported three layer beam. The sandwich beam consists of: two metal facings, the metal foam core and two binding layers between the faces and the core. In consequence, the beam is a five layer beam. The main goal of the study is to elaborate a mathematical model of this beam, analytical description and a solution of the three-point bending problem. The beam is subjected to a transverse load. The nonlinear hypothesis of the deformation of the cross section of the beam is formulated. Based on the principle of the stationary potential energy the system of four equations of equilibrium is derived. Then deflections and stresses are determined. The influence of the binding layers is considered. The results of the solutions of the bending problem analysis are shown in the tables and figures. The analytical model is verified numerically using the finite element analysis, as well as experimentally.
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Abstract

The Traffic Flow Description (TFD) option of the IP protocol is an experimental option, designed by the Authors and described by the IETF’s Internet Draft. This option was intended for signalling for QoS purposes. Knowledge about forthcoming traffic (such as the amount of data that will be transferred in a given period of time) is conveyed in the fields of the option between end-systems. TFD-capable routers on a path (or a multicast tree) between the sender and receiver(s) are able to read this information, process it and use it for bandwidth allocation. If the time horizons are short enough, bandwidth allocation will be performed dynamically. In the paper a performance evaluation of an HD video transmission QoS assured with the use of the TFD option is presented. The analysis was made for a variable number of video streams and a variable number of TCP flows that compete with the videos for the bandwidth of the shared link. Results show that the dynamic bandwidth allocation using the TFD option better assures the QoS of HD video than the classic solution, based on the RSVP protocol.
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Abstract

Power electronic circuits (PECs) are prone to various failures, whose classification is of paramount importance. This paper presents a data-driven based fault diagnosis technique, which employs a support vector data description (SVDD) method to perform fault classification of PECs. In the presented method, fault signals (e.g. currents, voltages, etc.) are collected from accessible nodes of circuits, and then signal processing techniques (e.g. Fourier analysis, wavelet transform, etc.) are adopted to extract feature samples, which are subsequently used to perform offline machine learning. Finally, the SVDD classifier is used to implement fault classification task. However, in some cases, the conventional SVDD cannot achieve good classification performance, because this classifier may generate some so-called refusal areas (RAs), and in our design these RAs are resolved with the one-against-one support vector machine (SVM) classifier. The obtained experiment results from simulated and actual circuits demonstrate that the improved SVDD has a classification performance close to the conventional one-against-one SVM, and can be applied to fault classification of PECs in practice.
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Abstract

The jubilee volume “Slavica Wratislaviensia”, CLIX: Wyraz i zdanie w językach słowiańskich (8), is a collection of contributions by pupils, collegues, and friends, dedicated to Professor Jan Sokołowski slavist of Wroclaw University, on the occasion of his 70th birthday. The publication topics covered subjects connected with researches on word and sentence in Slavic languages, their description, comparative and contrastive studies, and translation. They take up important current topics, reliably and comprehensively analyze problems that have not been noticed before or have not been solved yet. Due to the selection of topics and high scientific level (most authors are renowned linguists) the volume should be considered as representative for contemporary Slavic linguistics.
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Abstract

In general the iconographic details recorded in the hagiographic literature are pretty meagre. Authors focus on the miraculous properties of icons. The Coptic lives of the saints may be selected as representative for the Early Christian and Byzantine hagiography. The Martyrdom and Miracles of Saint Mercurius the General and other lives contain stories about the Saint’s icons. We have some information about church decoration in the East, but, it does not look as impressive as John of Gaza’s extensive ecphraseis of St. Sergius’ and St. Stephen’s complex decorative programmes. However, we actually find a number of interesting minor descriptions in the church histories, in the theological polemic on icons, and in the hagiographies. A Syriac manuscript from the British Museum preserves a chronicle of the monastery of Qartamin, Mor Gabriel. I focus on a chapter which describes the church’s construction and its interior decoration. The essential part of the art terminology, which we know from the Coptic texts, consists of the Greek borrowings. The Syriac texts show an entirely different pattern. The Syriac description compiled by an anonymous monk from Qartamin resembles the hymn on the Edessa Cathedral. The Syriac art description in general evolved along entirely different lines from the Greek ecphrasis. Greek borrowings in the discussed Syriac texts are rare, and if they do appear, they are limited to only certain words.
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