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Abstract

The effect of the power amplifier on speech intelligibility in public address systems is often marginalised – i.e. it is assumed that it does not introduce significant signal distortion. This approach is justified when the linear range of the amplifier is used. The large crest factor of the speech signal and economic considerations mean that the amplifier also works in the non-linear range. In this paper, the effect of power amplifier distortion on the speech transmission index for public address systems (STIPA) is presented. In the first step, this influence was evaluated by measurements for Class AB and D amplifiers. Then, a computer model of the public address system based on the direct STIPA method, taking into account the non-linear properties of the amplifier, was proposed. Using the computer model, the optimum amplifier driving values were determined taking into account the reverberation time and interfering noise.
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Authors and Affiliations

Paweł Dziechciński
1

  1. Department of Acoustics, Multimedia and Signal Processing, Wrocław University of Science and Technology, Wrocław, Poland
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Abstract

The article analyzes the implementation of dialogicality in the artistic discourse referring to dialogue as a form of explication of dialogicity in text communication, as a special type of speech interaction which serves as the most relevant means of verbalizing the speaker’s communicative intentions and is represented by a question/answer complex of stimulus/reaction exchange. Based on the voluminous factual material, the explication of dialogic intentions is traced in two typological registers of communication: tolerant and a-tolerant; it is indicated that, on the one hand, the addressant/addressee continuum of speech interaction conveys a be-nevolent atmosphere and expresses the modality of interlocutors’ mutual understanding and tolerant attitude about themselves being realized through various modal-intentional utterances, primarily interrogative, and stimulating and optative constructions, the use of which contributes to the progress of the communicative process; on the other hand, there is a-tolerant register – a natural phenomenon that reflects the imbalance in relations between communicating parties, the principled incompatibility of views, a conflict in general, represented by counter-questions, echo-questions, evil wishes incentive imperatives, invectives, etc.

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Authors and Affiliations

Світлана Шабат-Савка
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Abstract

Steganography is a technique that allows hidden transfer of data using some media such as Image, Audio, Video, Network Protocol or a Document, without its existence getting noticed. Over the past few years, a lot of research has been done in the field of Image, Video and Audio Steganography but very little work has been done in Network Steganography. A Network Steganography technique hides data in a Network Data Unit, i.e., a Network Protocol Packet. In this paper we present an algorithm ARPNetSteg that implements Network Steganography using the Address resolution protocol. Our technique is a robust technique that can transfer 44 bits of covert data per ARP reply packet.

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Authors and Affiliations

Punam Bedi
Arti Dua
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Abstract

This paper discusses the first Gdańsk address books published by Ferdinand Troschel in the period between the Second Partition of Poland and the establishment of the Napoleonic Free City of Gdańsk. During this period, the books were issued in 1796, 1797, and 1800. Their publication was based on the privilege the Prussian King Frederick William II issued on 16 May 1795. The address books covered the area of the city of Gdańsk, the United City of Chełm and their nearest environs.
Not only information from address books, but also notifications of their sale and press advertisements concerning their publisher were used in this article. Apart from typical personal and topographic information, the address books provide a lot of interesting details on the public life of the time and the functioning of offices, which have not survived in any other sources available today.
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Bibliography

Źródła

Adreßbuch der Königl. West‑Preußischen See- und Handelstadt Danzig und der combinirten Städte Stolzenberg fürs Jahr 1797, Danzig 1797, Polska Akademia Nauk Biblioteka Gdańska, sygn.. Uph o. 4837 i Od 693 8° [druk zaginiony], Staatsbibliothek zu Berlin, sygn. Sz 6774 [strata wojenna].
Adreßbuch der Königl. West‑Preußischen See und Handelstadt Danzig und der combinirten Städte Stolzenberg, Danzig 1796, Polska Akademia Nauk Biblioteka Gdańska, sygn. Uph o. 4836 i Od 693 8° [druk zaginiony], Dänische Königliche Bibliothek, sygn. 161, 280c-1796.
Adreßbuch der Königl. West‑Preußischen See und Handelstadt Danzig und der combinirten Städte Stolzenberg fürs Jahr 1800, Danzig 1800, Polska Akademia Nauk Biblioteka Gdańska, sygn. Uph o. 4838 i Od 693, 8° [druk zaginiony], Staatsbibliothek zu Berlin, sygn. Sz 6774 [strata wojenna].

Dantziger Kühr: wie die Bürgermeistere, Burggraffen, Rahtsherren, Richtere undt Schöppen der Königlichen Stadt Dantzig... gekohren, auch wie und wannein Jeder gestorben sey... Von Anno 1342 biss Anno 1684, Archiwum Państwowe w Gdańsku, sygn. 300, R/G,20.
Fasti Vrbis Gedanensis Praeconsulorum et Consulorum nec non Scabinorum ab A. Christiano 1342, Archiwum Państwowe w Gdańsku, sygn. 300, R/G,21.

„Danziger Intelligenz-Blatt“, No. 104, 1813.
„Danziger Nachrichten und Anzeigen“, St. 1, 6, 7, 8, 1796; St. 75, 76, 77, 1797; St. 28, 29, 1800.
„Königlich Preußische Danziger Nachrichten und Anzeigen zum Nutzen und Besten des Publikums“, St. 39, 51, 1795.

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Gliński M., Adolph Heinrich Ferdinand Troschel, https://www.gedanopedia.pl/gdansk/?title=TROSCHEL_ ADOLPH_HEINRICH_FERDINAND
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Authors and Affiliations

Piotr Paluchowski
1
ORCID: ORCID

  1. Zakład Historii i Filozofii Nauk Medycznych, Gdański Uniwersytet Medyczny, ul. Tuwima 15, 80-210 Gdańsk

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