Search (19 results, page 1 of 1)

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Date

22. 3.2008 16:18:27

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Series

Handbuch Internet-Suchmaschinen; 2

Signature

63 TVK 241-2+2

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Issue

2., aktualisierte und stark erw. Aufl.

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Issue

2. Aufl.

Series

Einführungen: Kommunikationswissenschaft ; 2

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Isbn

3-540-38223-2

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Content

Das Buchprojekt entstand im Rahmen des Forschungsprojektes Theseus (Teilprojekt Alexandria). - Als Online Publikation vgl.: http://www.bui.haw-hamburg.de/fileadmin/user_upload/lewandowski/Web20-Buch/lewandowski-maass.pdf. Rez. in: ZfBB 56(2009) H.2, S.134-135 (K. Lepsky)

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Date

2. 3.2015 10:12:21

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Issue

2., aktualisierte Aufl.

Signature

TZA 6160(2)

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Abstract

This text introduces the standardized knowledge representation languages for modeling ontologies operating at the core of the semantic web. It covers RDF schema, Web Ontology Language (OWL), rules, query languages, the OWL 2 revision, and the forthcoming Rule Interchange Format (RIF). A 2010 CHOICE Outstanding Academic Title ! The nine chapters of the book guide the reader through the major foundational languages for the semantic Web and highlight the formal semantics. ! the book has very interesting supporting material and exercises, is oriented to W3C standards, and provides the necessary foundations for the semantic Web. It will be easy to follow by the computer scientist who already has a basic background on semantic Web issues; it will also be helpful for both self-study and teaching purposes. I recommend this book primarily as a complementary textbook for a graduate or undergraduate course in a computer science or a Web science academic program. --Computing Reviews, February 2010 This book is unique in several respects. It contains an in-depth treatment of all the major foundational languages for the Semantic Web and provides a full treatment of the underlying formal semantics, which is central to the Semantic Web effort. It is also the very first textbook that addresses the forthcoming W3C recommended standards OWL 2 and RIF. Furthermore, the covered topics and underlying concepts are easily accessible for the reader due to a clear separation of syntax and semantics ! I am confident this book will be well received and play an important role in training a larger number of students who will seek to become proficient in this growing discipline.

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Classification

005.7/2 / dc21

DDC

005.7/2 / dc21

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Footnote

Rez. in: Mitt VÖB 60(2007) H.3, S.85-86 (M. Buzinkay): "Ein aktuelles Thema der Informationsbranche ist Web 2.0. Für die einen Hype, für andere Web-Realität, ist das Web 2.0 seit wenigen Jahren das "neue Web". Der Autor, Tom Alby, versucht daher im ersten Kapitel auch einen Unterschied zum Vorgänger-Web aufzubauen: Was ist so anders im Web 2.0? In weiterer Folge handelt Alby alle Themen ab, die mit Web 2.0 in Verbindung gebracht werden: Blogging, Podcasting, Social Software, Folksonomies, das Web als Plattform und diverse Web 2.0 typische Technologien. Ein Ausblick auf das Web 3.0 darf auch nicht fehlen. Das Buch liefert hier die notwendigen Einführungen und "Brücken", um auch als Laie zumindest ansatzweise Verständnis für diese neuen Entwicklungen aufzubringen. Daher ist es nur konsequent und sehr passend, dass Alby neben seinem technischen Fachjargon auch leicht verständliche Einführungsbeispiele bereithält. Denn es geht Alby weniger um Technologie und Tools (diese werden aber auch behandelt, eben beispielhaft), sondern vor allem um Konzepte: Was will das Web 2.0 überhaupt und was macht seinen Erfolg aus? Das Buch ist einfach zu lesen, mit zahlreichen Illustrationen bebildert und listet eine Unmenge an online Quellen für eine weitere Vertiefung auf. Doch mit Büchern über das Web ist es genauso wie dem Web selbst: die Halbwertszeit ist sehr kurz. Das gilt insbesondere für die Technik und für mögliche Dienste. Alby hat diesen technischen Zweig der Web 2.0-Geschichte so umfangreich wie für das Verständnis nötig, aus Gründen der Aktualität aber so gering wie möglich ausfallen lassen. Und das ist gut so: dieses Buch können Sie getrost auch in drei Jahren in die Hand nehmen. Es wird zwar andere Dienste geben als im Buch angegeben, und manche Links werden vielleicht nicht mehr funktionieren, die Prinzipien des Web 2.0 bleiben aber dieselben. Sollten Sie sich geändert haben, dann haben wir schon Web 2.x oder gar Web 3.0. Aber das ist eine andere Geschichte, die uns vielleicht Tom Alby zur angemessenen Zeit weitergeben möchte. Ein Bonus, wie ich finde, sind die zahlreichen Interviews, die Tom Alby mit bekannten deutschen Web 2.0 Aushängeschildern geführt hat. Sie geben einen guten Einblick, welchen Stellenwert Web 2.0 in der Zwischenzeit gewonnen hat. Nicht nur in einer Nische von Web-Freaks, sondern in der Welt der Kommunikation. Und das sind wir."

Issue

2., aktualisierte Aufl.

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Footnote

Vgl.: Krempl, S.: Vom Mythos Internet unter: http://www.heise.de/tp/r4/artikel/2/2067/1.html.

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Isbn

3-540-41719-2

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Footnote

Rez. in Mitt. VÖB 63(2010) H.1/2, S.147-148 (M. Buzinkay): "Webseiten-Gestaltung und Webseiten-Analyse gehen Hand in Hand. Leider wird das Letztere selten wenn überhaupt berücksichtigt. Zu Unrecht, denn die Analyse der eigenen Maßnahmen ist zur Korrektur und Optimierung entscheidend. Auch wenn die Einsicht greift, dass die Analyse von Webseiten wichtig wäre, ist es oft ein weiter Weg zur Realisierung. Warum? Analyse heißt kontinuierlicher Aufwand, und viele sind nicht bereit beziehungsweise haben nicht die zeitlichen Ressourcen dazu. Ist man einmal zu der Überzeugung gelangt, dass man seine Web-Aktivitäten dennoch optimieren, wenn nicht schon mal gelegentlich hinterfragen sollte, dann lohnt es sich, Marco Hasslers "Web Analytics" in die Hand zu nehmen. Es ist definitiv kein Buch für einen einzigen Lese-Abend, sondern ein Band, mit welchem gearbeitet werden muss. D.h. auch hier: Web-Analyse bedeutet Arbeit und intensive Auseinandersetzung (ein Umstand, den viele nicht verstehen und akzeptieren wollen). Das Buch ist sehr dicht und bleibt trotzdem übersichtlich. Die Gliederung der Themen - von den Grundlagen der Datensammlung, über die Definition von Metriken, hin zur Optimierung von Seiten und schließlich bis zur Arbeit mit Web Analyse Werkzeugen - liefert einen roten Faden, der schön von einem Thema auf das nächste aufbaut. Dadurch fällt es auch leicht, ein eigenes Projekt begleitend zur Buchlektüre Schritt für Schritt aufzubauen. Zahlreiche Screenshots und Illustrationen erleichtern zudem das Verstehen der Zusammenhänge und Erklärungen im Text. Das Buch überzeugt aber auch durch seine Tiefe (bis auf das Kapitel, wo es um die Zusammenstellung von Personas geht) und den angenehm zu lesenden Schreibstil. Von mir kommt eine dringende Empfehlung an alle, die sich mit Online Marketing im Allgemeinen, mit Erfolgskontrolle von Websites und Web-Aktivitäten im Speziellen auseindersetzen."

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Content

Inhalt: 1. Einleitung (A. Dengel, A. Bernardi) 2. Wissensrepräsentation (A. Dengel, A. Bernardi, L. van Elst) 3. Semantische Netze, Thesauri und Topic Maps (O. Rostanin, G. Weber) 4. Das Ressource Description Framework (T. Roth-Berghofer) 5. Ontologien und Ontologie-Abgleich in verteilten Informationssystemen (L. van Elst) 6. Anfragesprachen und Reasoning (M. Sintek) 7. Linked Open Data, Semantic Web Datensätze (G.A. Grimnes, O. Hartig, M. Kiesel, M. Liwicki) 8. Semantik in der Informationsextraktion (B. Adrian, B. Endres-Niggemeyer) 9. Semantische Suche (K. Schumacher, B. Forcher, T. Tran) 10. Erklärungsfähigkeit semantischer Systeme (B. Forcher, T. Roth-Berghofer, S. Agne) 11. Semantische Webservices zur Steuerung von Prooduktionsprozessen (M. Loskyll, J. Schlick, S. Hodeck, L. Ollinger, C. Maxeiner) 12. Wissensarbeit am Desktop (S. Schwarz, H. Maus, M. Kiesel, L. Sauermann) 13. Semantische Suche für medizinische Bilder (MEDICO) (M. Möller, M. Sintek) 14. Semantische Musikempfehlungen (S. Baumann, A. Passant) 15. Optimierung von Instandhaltungsprozessen durch Semantische Technologien (P. Stephan, M. Loskyll, C. Stahl, J. Schlick)

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Abstract

Semantische Techniken zur strukturierten Erschließung von Web 2.0-Content und kollaborative Anreicherung von Web Content mit maschinenlesbaren Metadaten wachsen zum Social Semantic Web zusammen, das durch eine breite Konvergenz zwischen Social Software und Semantic Web-Technologien charakterisiert ist. Dieses Buch stellt die technischen, organisatorischen und kulturellen Veränderungen dar, die das Social Semantic Web begleiten, und hilft Entscheidungsträgern und Entwicklern, die Tragweite dieser Web-Technologie für ihr jeweiliges Unternehmen zu erkennen. Social Semantic Web: Web 2.0 - Was nun? ist quasi die 2. Auflage von Semantic Web: Wege zur vernetzten Wissensgesellschaft von 2006, in der jedoch eher die technischen Aspekte im Vordergrund standen - einiges ist seitdem im weltweiten Netz passiert, vor allem mit dem, als Web 2.0 gestempelten Ajax-User-Community-Mix in Verbindung mit dem Semantic Web wurden und werden die Karten an einigen Enden der Datenautobahn neu gemischt - dem tragen Andreas Blumauer und Tassilo Pellegrini mit einem Update ihrer Fachautorensammlung für interessierte Laien und themenfremde Experten in der passenden 2.0-Neuauflage Rechnung.

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Footnote

Rez. in: JASIST 58(2007) no.4, S.608-609 (K.D. Desouza): "Richard Rogers explores the distinctiveness of the World Wide Web as a politically contested space where information searchers may encounter multiple explanations of reality. Sources of information on the Web are in constant competition with each other for attention. The attention a source receives will determine its prominence, the ability to be a provider of leading information, and its inclusion in authoritative spaces. Rogers explores the politics behind evaluating sources that are collected and housed on authoritative spaces. Information politics on the Web can be looked at in terms of frontend or back-end politics. Front-end politics is concerned with whether sources on the Web pay attention to principles of inclusivity, fairness, and scope of representation in how information is presented, while back-end politics examines the logic behind how search engines or portals select and index information. Concerning front-end politics, Rogers questions the various versions of reality one can derive from examining information on the Web, especially when issues of information inclusivity and scope of representation are toiled with. In addition, Rogers is concerned with how back-end politics are being controlled by dominant forces of the market (i.e., the more an organization is willing to pay, the greater will be the site's visibility and prominence in authoritative spaces), regardless of whether the information presented on the site justifies such a placement. In the book, Rogers illustrates the issues involved in back-end and front-end politics (though heavily slanted on front-end politics) using vivid cases, all of which are derived from his own research. The main thrust is the exploration of how various "information instruments," defined as "a digital and analytical means of recording (capturing) and subsequently reading indications of states of defined information streams (p. 19)," help capture the politics of the Web. Rogers employs four specific instruments (Lay Decision Support System, Issue Barometer, Web Issue Index of Civil Society, and Election Issue Tracker), which are covered in detail in core chapters of the book (Chapter 2-Chapter 5). The book is comprised of six chapters, with Chapter 1 being the traditional introduction and Chapter 6 being a summary of the major concepts discussed.
Chapter 2 examines the politics of information retrieval in the context of collaborative filtering techniques. Rogers begins by discussing the underpinnings of modern search engine design by examining medieval practices of knowledge seeking, following up with a critique of the collaborative filtering techniques. Rogers's major contention is that collaborative filtering rids us of user idiosyncrasies as search query strings, preferences, and recommendations are shared among users and without much care for the differences among them, both in terms of their innate characteristics and also their search goals. To illustrate Rogers' critiques of collaborative filtering, he describes an information searching experiment that he conducted with students at University of Vienna and University of Amsterdam. Students were asked to search for information on Viagra. As one can imagine, depending on a number of issues, not the least of which is what sources did one extract information from, a student would find different accounts of reality about Viagra, everything from a medical drug to a black-market drug ideal for underground trade. Rogers described how information on the Web differed from official accounts for certain events. The information on the Web served as an alternative reality. Chapter 3 describes the Web as a dynamic debate-mapping tool, a political instrument. Rogers introduces the "Issue Barometer," an information instrument that measures the social pressure on a topic being debated by analyzing data available from the Web. Measures used by the Issue Barometer include temperature of the issue (cold to hot), activity level of the debate (mild to intense), and territorialization (one country to many countries). The Issues Barometer is applied to an illustrative case of the public debate surrounding food safety in the Netherlands in 2001. Chapter 4 introduces "The Web Issue Index," which provides an indication of leading societal issues discussed on the Web. The empirical research on the Web Issues Index was conducted on the Genoa G8 Summit in 1999 and the anti-globalization movement. Rogers focus here was to examine the changing nature of prominent issues over time, i.e., how issues gained and lost attention and traction over time.

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Issue

2., aktualisierte Aufl.

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Isbn

978-3-280-04065-2