scholarly journals From Turing machines to computer viruses

Author(s):  
Jean-Yves Marion

Self-replication is one of the fundamental aspects of computing where a program or a system may duplicate, evolve and mutate. Our point of view is that Kleene's (second) recursion theorem is essential to understand self-replication mechanisms. An interesting example of self-replication codes is given by computer viruses. This was initially explained in the seminal works of Cohen and of Adleman in the 1980s. In fact, the different variants of recursion theorems provide and explain constructions of self-replicating codes and, as a result, of various classes of malware. None of the results are new from the point of view of computability theory. We now propose a self-modifying register machine as a model of computation in which we can effectively deal with the self-reproduction and in which new offsprings can be activated as independent organisms.

2020 ◽  
Vol 29 (4) ◽  
pp. 741-757
Author(s):  
Kateryna Hazdiuk ◽  
◽  
Volodymyr Zhikharevich ◽  
Serhiy Ostapov ◽  
◽  
...  

This paper deals with the issue of model construction of the self-regeneration and self-replication processes using movable cellular automata (MCAs). The rules of cellular automaton (CA) interactions are found according to the concept of equilibrium neighborhood. The method is implemented by establishing these rules between different types of cellular automata (CAs). Several models for two- and three-dimensional cases are described, which depict both stable and unstable structures. As a result, computer models imitating such natural phenomena as self-replication and self-regeneration are obtained and graphically presented.


Author(s):  
Filomena Antunes Sobral ◽  
Daniela Morgado Oliveira

In the development of the relationship between the artist and his artistic creation, the deconstruction of concepts and ideas within the scope of artistic praxis leads to the reflection of the crucial role that the artist has in the conception and meaning of the work. His creative production, in turn, appropriates not only the expressive force of the author to assert itself as an artistic creation, but can also assume to be the reflection of the self, its identity and materializes in the form of self-portrait. The self-portrait expands the artist’s interiority, externalizing concerns and questions, and conveys a subjective point of view about himself and his view of art. But how does self-portrait contribute to self-awareness? And how does the artist reveal himself and communicate beyond his appearance?Based on these questions, the objective of this paper is to provide a reflection on self-portrait presenting the results of an artistic installation project that involved photographic language in the form of self-portrait and experimental video to represent feelings of disquiet. Influences such as Cindy Sherman, Lais Pontes or Francesca Woodman, whose creations approach the self-portrait in a not only original, but critical style, stand out.It is a project of academic and artistic nature supported by theoretical foundations. The results allow us to conclude that the artistic installation, which began by presenting a self-portraying self-seeking identity, frees itself from its creator to enhance multiple variable interpretations depending on the observer’s attention.


2019 ◽  
Author(s):  
Ken Ohsaka

Difficulties to synthesize RNA nucleotides from their subunits in modern labs under simulated environments leads us to propose a possible process for the synthesis by cross complimentary self-replication with help of clay minerals, which might be operated on prebiotic Earth. Clay minerals are known to be good catalysts and certainly existed on prebiotic Earth. The self-replication of RNA nucleotides (monomers) may be considered as the origin of potential self-replication of some extant RNA polymers, and also the reason for homochirality of RNA molecules.


2019 ◽  
Vol 19 (1) ◽  
pp. 165-185
Author(s):  
Julie Rodgers

Sophie Daull's Camille, mon envolée (2015) is an autobiographical depiction of the sudden and traumatic loss of an only daughter (Camille) due to an undetected fatal bacterial infection. It is recounted uniquely from the maternal point of view and directly addresses the daughter throughout. It concerns an incredibly recent bereavement as the writing of the text, the author tells us, commences just one week after the daughter's death. Camille, mon envolée is a markedly intimate and brutally honest account of a mother who is an active witness to and, one could argue, participant in her daughter's agonizing death scene. The text captures the sense of powerlessness that is experienced by the mother, the incomprehensibility of the loss, the self-blame, and, finally, the coming to terms with it and the learning to live on, not without guilt, however. It also offers insight into maternal motivation for writing such a text, ranging from a quest for understanding and an outlet for grief, to a desire to preserve the daughter's memory. Furthermore, through close examination of the physical, psychological and social impact of the death of a child on mother figure subjectivity, Camille mon envolée successfully traces out for the reader the very specific characteristics of maternal bereavement and its overwhelmingly embodied nature. Finally, the text represents an engagement on the part of the grieving mother with what has been termed 'scriptotherapy' in a bid to negotiate this trauma and find a means, not only of remembering the daughter, but also of surviving the tragedy. In this respect, Camille, mon envolée is a text of resistance, where the unthinkable is confronted and the untellable bravely told.


2019 ◽  
Vol 10 (1) ◽  
pp. 13
Author(s):  
Manuel Rivas Zancarrón

Together with an oral manifestation put into practice by tradition since birth, necessity drove ordinary people to develop the ability to speak with an absence of the self, the you and the communicative situation. Initially, it was the emigration to America, promoted by the miseries of a decadent homeland, which contributed to the development of a textual genre of urgency, without literary retensions, which in later years became a sign of good education on the part of those using it. With this work, we review the methodological pitfalls that are hidden when accessing this type of object. We analyse the difficulties that might be found by researchers when facing these documents from a philological point of view and from the sociolinguistic view of the attitudes of the speakers—both implicit and explicit. The concept of “discursive tradition” will act as a methodological moderator and will allow the construction of a bridge between diachronic Sociolinguistics and Language History in the recovery of oral remains from the speech of the 18th and 19th centuries in Spain and America.


Author(s):  
Stacey Abbott

This chapter examines the adoption and development of the first person narrative format within vampire, and more recently zombie, film and television. It considers how this trope has contributed to the rise of the sympathetic/romantic vampire figure from the Byronic hero within Polidori’s The Vampyre to Interview with the Vampire and Byzantium and the subsequent rise of the sympathetic zombie. This chapter questions if this first person point of view empties the vampire and zombie of symbolic agency, or manipulates the genre to explore new meanings. It considers how the genres of the vampire and the zombie are increasingly interconnected, moving away from themes of apocalypse and cultural anxiety to explore questions of identity and the self within a changing world, effectively queering the vampire and zombie for new audiences.Case studies include Let the Right One In, Byzantium, Only Lovers Left Alive, Warm Bodies, Colin, and In the Flesh.


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