This book introduces the reader to the principles used in the construction of a large range of modern data communication protocols. The approach we take is rather a formal one, primarily based on descriptions of protocols in the notation of CSP. This not only enables us to describe protocols in a concise manner, but also to reason about many of their interesting properties and formally to prove certain aspects of their correctness with respect to appropriate speci?cations. Only after considering the main principles do we go on to consider actual protocols where these principles are exploited. This is a completely new edition of a book which was ?rst published in 1994, where the main focus of many international efforts to develop data communication systems was on OSI - Open Systems Interconnection - the standardised archit- ture for communication systems developed within the International Organisation for Standardization, ISO. In the intervening 13 years, many of the speci?c protocols - veloped as part of the OSI initiative have fallen into disuse. However, the terms and concepts introduced in the OSI Reference Model are still essential for a systematic and consistent analysis of data communication systems, and OSI terms are therefore used throughout. There are three signi?cant changes in this second edition of the book which p- ticularly re?ect recent developments in computer networks and distributed systems.

Mosaic Fictions is the first book-length critical analysis of Canadian Spanish Civil War literature. Exploring published and archival writings, the book focuses on the extensive contributions of Jewish Canadian authors as they articulate the stakes of the Spanish Civil War (1936-9) in the language of a nascent North American multiculturalism. Placing Jewish Canadian writers within overlapping North American networks of Jewish, Black, immigrant, female, and queer writers challenges the national distinctions that dominate current critical approaches to Anglophone Spanish Civil War literature. Reframing the narrative of Spain's noble but tragic struggle against fascism in the Spanish Civil War, the book demonstrates how marginalized North American supporters of the Spanish Republic crafted narratives of inclusive citizenship amidst a national crisis not entirely their own. Mosaic Fictions examines texts composed between the war's outbreak and the present to illuminate the integral connections between Canada's developing national identity and global leftist action.

Meet Me on the Barricades is Harrison's most experimental work. The novel includes a series of fantasy sequences that culminate in a scene heavily indebted to the Nighttown episode in James Joyce's Ulysses (the novel was published a year before James Thurber's better-known short story, "The Secret Life of Walter Mitty"). The novel is also Harrison's only foray into satire-an especially unexpected turn given that the Spanish Civil War literary canon, and particularly works of literature written in the midst of the war, tend towards earnestness rather than irony. Harrison's novel is thus a unique book, significant for its self-consciousness as a modernist novel and as a political document. Out of print since its single publication run in 1938, this critical edition recovers Harrison's important commentary on the heated "culture wars" of the 1930s and the Spanish Civil War. With an original critical introduction and extensive textual and editorial notes, this edition draws on original archival research to situate the novel within the modernist and leftist North American canons. Meet Me on the Barricades is a densely allusive text that layers global politics, revolutionary theory, classical music, literary theory, world history, and anti-Stalinism, as well as emergent biological discourses about sex. It recounts a few days in the life of P. Herbert Simpson, a middle-aged, weak-hearted oboist with the New York Symphony Orchestra and leftist fellow traveller. Simpson is subject to wild hallucinations that are sometimes daydreams, sometimes drunken delirium, and on occasion intricate dreams while asleep. He imagines escaping his unrewarding marriage with a prudish, domineering wife through a passionate fantasy of a Russian girlfriend, and escaping his day job in the symphony to fight on the front lines of the Spanish Civil War.

This book introduces the reader to the principles used in the construction of a large range of modern data communication protocols. The approach we take is rather a formal one, primarily based on descriptions of protocols in the notation of CSP. This not only enables us to describe protocols in a concise manner, but also to reason about many of their interesting properties and formally to prove certain aspects of their correctness with respect to appropriate speci?cations. Only after considering the main principles do we go on to consider actual protocols where these principles are exploited. This is a completely new edition of a book which was ?rst published in 1994, where the main focus of many international efforts to develop data communication systems was on OSI - Open Systems Interconnection - the standardised archit- ture for communication systems developed within the International Organisation for Standardization, ISO. In the intervening 13 years, many of the speci?c protocols - veloped as part of the OSI initiative have fallen into disuse. However, the terms and concepts introduced in the OSI Reference Model are still essential for a systematic and consistent analysis of data communication systems, and OSI terms are therefore used throughout. There are three signi?cant changes in this second edition of the book which p- ticularly re?ect recent developments in computer networks and distributed systems.