Steven Ungar. Critical Mass: Social Documentary in France from the Silent Era to the New Wave. Minneapolis: University of Minnesota Press, 2018. 384 pp.

2020 ◽  
Vol 46 (4) ◽  
pp. 931-932
Author(s):  
Sam Di Iorio
2006 ◽  
Vol 290 (1) ◽  
pp. H255-H263 ◽  
Author(s):  
Zhilin Qu

The tendency of atrial or ventricular fibrillation to terminate spontaneously in finite-sized tissue is known as the critical mass hypothesis. Previous studies have shown that dynamical instabilities play an important role in creating new wave breaks that maintain cardiac fibrillation, but its role in self-termination, in relation to tissue size and geometry, is not well understood. This study used computer simulations of two- and three-dimensional tissue models to investigate qualitatively how, in relation to tissue size and geometry, dynamical instability affects the spontaneous termination of cardiac fibrillation. The major findings are as follows: 1) Dynamical instability promotes wave breaks, maintaining fibrillation, but it also causes the waves to extinguish, facilitating spontaneous termination of fibrillation. The latter effect predominates as dynamical instability increases, so that fibrillation is more likely to self-terminate in a finite-sized tissue. 2) In two-dimensional tissue, the average duration of fibrillation increases exponentially as tissue area increases. In three-dimensional tissue, the average duration of fibrillation decreases initially as tissue thickness increases as a result of thickness-induced instability but then increases after a critical thickness is reached. Therefore, in addition to tissue mass and geometry, dynamical instability is an important factor influencing the maintenance of cardiac fibrillation.


Author(s):  
Ramona Fotiade

The title of this chapter takes its cue from one of Jean-Luc Godard’s well-known articles, published in Cahiers du cinéma in 1956, which engaged with Bazin’s conception of cinematic realism in an attempt to effect a generational break with the past by proposing a revised understanding of montage, not simply as an integral part of mise-en-scène, but as a form of deliberate authorial statement and, in that sense, as a practical extension of the New Wave ideology or politique des auteurs. In highlighting Bazin’s formative influence on the New Wave directors (in particular, his relationship to Truffaut and Godard), this chapter also focuses on the revived interest in early avant-garde experimentation (as evidenced, for instance, by Godard’s use of silent era shot transitions, image/sound disjunction and quotations from Surrealist poets in A bout de souffle), as well as the emergence of postmodern strategies and notions of rhythm, movement and time in French cinema (again present in the early work of Jean-Luc Godard), which prefigured Deleuze’s re-appraisal of montage as part of his theory of the movement-image and the time-image.


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