Harald Sack

This open access book constitutes the refereed proceedings of the 15th International Conference on Semantic Systems, SEMANTiCS 2019, held in Karlsruhe, Germany, in September 2019. The 20 full papers and 8 short papers presented in this volume were carefully reviewed and selected from 88 submissions. They cover topics such as: web semantics and linked (open) data; machine learning and deep learning techniques; semantic information management and knowledge integration; terminology, thesaurus and ontology management; data mining and knowledge discovery; semantics in blockchain and distributed ledger technologies. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.

This open access book constitutes the refereed proceedings of the 15th International Conference on Semantic Systems, SEMANTiCS 2019, held in Karlsruhe, Germany, in September 2019. The 20 full papers and 8 short papers presented in this volume were carefully reviewed and selected from 88 submissions. They cover topics such as: web semantics and linked (open) data; machine learning and deep learning techniques; semantic information management and knowledge integration; terminology, thesaurus and ontology management; data mining and knowledge discovery; semantics in blockchain and distributed ledger technologies. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.

The authors give a detailed summary about the fundamentals and the historical background of digital communication. This includes an overview of the encoding principles and algorithms of textual information, audio information, as well as images, graphics, and video in the Internet. Furthermore the fundamentals of computer networking, digital security and cryptography are covered. Thus, the book provides a well-founded access to communication technology of computer networks, the internet and the WWW. Numerous pictures and images, a subject-index and a detailed list of historical personalities including a glossary for each chapter increase the practical benefit of this book that is well suited as well as for undergraduate students as for working practitioners.

This book is supposed to serve as a comprehensive and instructive guide through the new world of digital communication. On the physical layer optical and electrical cabling technology are described as well as wireless communication technologies. On the data link layer local area networks (LANs) are introduced together with the most popular LAN technologies such as Ethernet, Token Ring, FDDI, and ATM as well as wireless LAN technologies including IEEE 802.x, Bluetooth, or ZigBee. A wide range of WAN technologies are covered including contemporary high speed technologies like PDH and SDH up to high speed wireless WANs (WiMAX) and 4th generation wireless telephone networks LTE. Routing technologies conclude the treatment of the data link layer. Next, there is the Internet layer with the Internet protocol IP that establishes a virtual uniform network out of the net of heterogeneous networks. In detail, both versions, IPv4 as well as the successor IPv6 are covered in detail as well as ICMP, NDP, and Mobile IP. In the subsequent transport layer protocol functions are provided to offer a connection-oriented and reliable transport service on the basis of the simple and unreliable IP. The basic protocols TCP and UDP are introduced as well as NAT, the network address translation. Beside transport layer security protocols like SSL and TLS are presented. On the upmost application layer popular Internet application protocols are described like DNS, SMTP, PGP, (S)FTP, NFS, SSH, DHCP, SNMP, RTP, RTCP, RTSP, and World Wide Web.

The authors give a detailed summary about the fundamentals and the historical background of digital communication. This includes an overview of the encoding principles and algorithms of textual information, audio information, as well as images, graphics, and video in the Internet. Furthermore the fundamentals of computer networking, digital security and cryptography are covered. Thus, the book provides a well-founded access to communication technology of computer networks, the internet and the WWW. Numerous pictures and images, a subject-index and a detailed list of historical personalities including a glossary for each chapter increase the practical benefit of this book that is well suited as well as for undergraduate students as for working practitioners.

Das globale Internet ist ein offenes Netz, das heißt nicht begrenzt und für jedermann zugänglich. Allerdings hat diese Offenheit ihren Preis: Es gibt keine zentrale Kontrolle, die z. B. Unbefugten Einblick in die Kommunikation und damit in die Privatsphäre anderer Internetnutzer verwehren würde. Um dennoch einen ausreichenden Schutz der Vertraulichkeit und Privatsphäre zu gewährleisten, müssen in eigener Verantwortung Techniken und Tools aus der Kryptografie eingesetzt werden, die Nachrichten verschlüsseln oder deren Unversehrtheit sicherstellen helfen. Die Autoren zeigen unterschiedliche Wege auf, wie der Schutz der Privatsphäre im Internet wiederhergestellt werden kann.

This book is supposed to serve as a comprehensive and instructive guide through the new world of digital communication. On the physical layer optical and electrical cabling technology are described as well as wireless communication technologies. On the data link layer local area networks (LANs) are introduced together with the most popular LAN technologies such as Ethernet, Token Ring, FDDI, and ATM as well as wireless LAN technologies including IEEE 802.x, Bluetooth, or ZigBee. A wide range of WAN technologies are covered including contemporary high speed technologies like PDH and SDH up to high speed wireless WANs (WiMAX) and 4th generation wireless telephone networks LTE. Routing technologies conclude the treatment of the data link layer. Next, there is the Internet layer with the Internet protocol IP that establishes a virtual uniform network out of the net of heterogeneous networks. In detail, both versions, IPv4 as well as the successor IPv6 are covered in detail as well as ICMP, NDP, and Mobile IP. In the subsequent transport layer protocol functions are provided to offer a connection-oriented and reliable transport service on the basis of the simple and unreliable IP. The basic protocols TCP and UDP are introduced as well as NAT, the network address translation. Beside transport layer security protocols like SSL and TLS are presented. On the upmost application layer popular Internet application protocols are described like DNS, SMTP, PGP, (S)FTP, NFS, SSH, DHCP, SNMP, RTP, RTCP, RTSP, and World Wide Web.

Dieses Handbuch bietet für alle Nutzer und Entwickler des World Wide Web einen fundierten Einblick in dessen Aufbau und Funktionsweise. Die Autoren stellen die Internet-Technologie ausführlich dar und geben einen umfassenden Überblick über die relevanten Teilbereiche des WWW. Neben den allgemeinen theoretischen und praktischen Grundlagen der Netzwerktechnik und einer Darstellung der TCP/IP-Protokolle werden auch die vielfältigen Medientypen und deren Kodierung im WWW erläutert. Darauf aufbauend wird auf spezielle Web-Technologien im WWW wie HTTP, HTML, CSS, XML/XSL aber auch Skriptsprachen und CGI-Programmierung eingegangen. Dabei werden die allgemeinverständlich angelegten Kapitel punktuell durch relevante Schwerpunktthemen technischer Natur ergänzt und vertieft. Zahlreiche Abbildungen sowie Index und Glossar zu jedem Kapitel erhöhen den praktischen Nutzen des Handbuchs.

Das Internet ist zu einem festen Bestandteil unseres täglichen Lebens geworden. Auf welchen technologischen Grundlagen das weltumspannende Internet arbeitet, verdeutlicht das Buch "Internetworking". In sieben Kapiteln werden dem Leser ausgehend von den physikalischen Grundlagen der Datenübertragung die Funktionsprinzipien und Technologien der lokalen Netzwerke (LANs) und der Weitverkehrsnetzwerke (WANs) veranschaulicht. Allgemein verständlich wird in den weiteren Kapiteln das dem Internet zugrunde liegende TCP/IP-Referenzmodell, sowie dessen Protokolle und zahlreichen Anwendungen vermittelt. Zusammengenommen stellt das Buch ein umfassendes Kompendium der Internet-Technologien dar, dessen praktischer Nutzen als Handbuch erhöht wird durch zahlreiche Abbildungen sowie Sachindex, Personenindex und Glossar zu jedem Kapitel.

Internet und WWW basieren auf dem Vermögen dank modernster Netzwerktechnologien Informationen und Medien jedweder Art in digitalisierter Form über digitale Nachrichtenkanäle zu transportieren und zu verbreiten. Die Autoren erläutern Grundlagen und geschichtliche Hintergründe der digitalen Kommunikation und geben einen Überblick über Methoden und Verfahren der Kodierung von Text-, Audio-, Grafik- und Videoinformation, die im Internet zur Anwendung kommen. In verständlich angelegten Kapiteln werden weiterhin die Grundlagen der Rechnervernetzung und der Sicherheit in Rechnernetzen vermittelt. Damit bietet das Buch einen fundierten Einstieg in die Kommunikationstechniken der Computernetzwerke, des Internets und des WWW. Zahlreiche Abbildungen sowie Sachindex, Personenindex und Glossar zu jedem Kapitel erhöhen den praktischen Nutzen dieses Handbuchs.