This book brings together contributions to the Fourth Artificial Life Workshop, held at the Massachusetts Institute of Technology in the summer of 1994.

Volume 2.

Harmless artificial life forms are on the loose on the Internet. Computer viruses and even robots are now able to evolve like their biological counterparts. Telecommunications companies are sending small packets of software to go forth and multiply to cope with ever-increasing telephone traffic. Protein-based computers are on the agenda, and a team in Japan is building an organic brain as clever as a kitten. Welcome to the startling world of Artificial Life. Artificial Life scientists are taking inanimate materials such as computer software and robots and making them behave just like living organisms. In the process they are discovering much about what drives evolution and just what it means to say that something is alive. Virtual Organisms traces the origins of this field from the days when it was practiced by a few maverick scientists to the present and the current boom in Alife research. Leading technology correspondent Mark Ward presents a fascinating survey of current ideas about the origins of life and the engines of evolution. Through interviews with leading developers of Artificial Life, and through his own compelling research, Ward shows how the convergence of technology with biology has enormous implications. In an accessible, entertaining manner, Virtual Organisms reveals an unexplored avenue in predicting the future of Artificial Life, and whether new forms of Alife may be evolving beyond their designer's control.

This book brings together a series of overview articles that appeared in the first three issues of the groundbreaking journal Artificial Life.

For students, researchers and professional scientist eager to gain insight into the emerging frontiers of Artifical Life, Chris Adami's work provides the basic underpinnings for properly understanding this interdisciplinary research area. The CD-ROM accompanying the book invites readers to actively experience artificial evolution in "real time" by using a proprietary simulation software program, AVIDA, which is contained on the CD.

Digital Contagions is the first book to offer a comprehensive and critical analysis of the culture and history of the computer virus phenomenon. The book maps the anomalies of network culture from the angles of security concerns, the biopolitics of digital systems, and the aspirations for artificial life in software. The genealogy of network culture is approached from the standpoint of accidents that are endemic to the digital media ecology. Viruses, worms, and other software objects are not, then, seen merely from the perspective of anti-virus research or practical security concerns, but as cultural and historical expressions that traverse a non-linear field from fiction to technical media, from net art to politics of software. Jussi Parikka mobilizes an extensive array of source materials and intertwines them with an inventive new materialist cultural analysis. Digital Contagions draws from the cultural theories of Gilles Deleuze and Félix Guattari, Friedrich Kittler, and Paul Virilio, among others, and offers novel insights into historical media analysis.

Looks at the emerging field of artificial life - the product of imagination - a mix of biology, mythology and technology.

An account of the creation of new forms of life and intelligence in cybernetics, artificial life, and artificial intelligence that analyzes both the similarities and the differences among these sciences in actualizing life.The Allure of Machinic Life

Virus as Composition, Complexity, Quasispecies, Dynamics, and Biological Implications, Second Edition, explains the fundamental concepts surrounding viruses as complex populations during replication in infected hosts. Fundamental phenomena in virus behavior, such as adaptation to changing environments, capacity to produce disease, and the probability to be transmitted or respond to treatment all depend on virus population numbers. Concepts such as quasispecies dynamics, mutations rates, viral fitness, the effect of bottleneck events, population numbers in virus transmission and disease emergence, and new antiviral strategies are included. The book's main concepts are framed by recent observations on general virus diversity derived from metagenomic studies and current views on the origin and role of viruses in the evolution of the biosphere. - Features current views on key steps in the origin of life and origins of viruses - Includes examples relating ancestral features of viruses with their current adaptive capacity - Explains complex phenomena in an organized and coherent fashion that is easy to comprehend and enjoyable to read - Considers quasispecies as a framework to understand virus adaptability and disease processes