Performativity, progressive avoidance and aspect

Unlike other reports of ongoing actions, English explicit performatives do not normally take progressive form. This suggests that “there is something over and above a mere concurrent report” in utterances like I bet you I’ll win the race that is absent in utterances like I’m betting you I’ll win the race (Levinson 1983: 259). For Krifka (2014), an explicit performative describes not the utterance act being produced, but the adoption of a new commitment, which has already happened at encoding time. If this is so, however, we might expect to find preterit- or present-perfect-form performative clauses and it appears that we do not. Using cross-linguistic data from genetically and geographically unrelated languages, we establish a strong typological tendency: explicit performative utterances use the same verbal construction that is used for reporting states holding at coding time. We attribute this tendency to an epistemic commonality between explicit performatives and state reports. In addition, we offer an explanation for exceptional uses of progressive aspect in apparently performative expressions, noted by, e.g., Searle (1989). Building on Dahl (1985), we have developed a questionnaire that allows us to identify the aspectual distinctions made in individual languages and which of these categories are employed in the various performative contexts (as classified by Searle 1976). Imperfective aspect is used to encode performatives and present-time states in, e.g., Arabic, Turkish and Bosnian/Croatian/Serbian. In Bantu languages like Lingala and Kirundi, performative predications receive perfective encoding, and this same form is used to report states holding at present. Japanese and the Austronesian language Kilivila feature unmarked verb forms in both present state reports and performative expressions. Progressive aspect is systematically excluded in the languages of our sample. Thus, in light of these typological observations, the use of the English simple present in performative contexts is not unexpected. The fact that present-time states and performative events receive the same aspectual construal across languages suggests a semantic commonality that cannot be conceived in terms of boundedness, one of the major parameters used to describe aspectual distinctions. We argue instead that aspectual categories encode epistemic distinctions, and that states and performative events are similar at this epistemic level: the situation type expressed by a performative or state predication is verifiable at the time of speaking. States have the subinterval property, according to which every segment of a state counts as an instance of that state, including that segment that overlaps the speech event. In the case of performatives, the reporting event and the performed event (promising, etc.) are one and the same; therefore, performative events are verifiable as such at speech time. The few scholars who touch on performativity and aspect in English appear to assume that in the rare attestations of progressive perfomatives, the predication does not perform a speech act (like promising) but rather reports on one’s own performance, as in I’m not just saying, I’m promising (Langacker 1987; Verschueren 1995; Krifka 2014). However, this characterization is not evidently applicable to examples like I’m warning you, Mrs. Hinkle: one more obscenity and I’ll charge you with contempt, which does count as a warning. Analysis of COCA data reveals that one type of performative clause, the exercitive type (Austin 1962), involving verbs such as warn and order, accounts for the majority of progressive performative tokens. Following McGowan (2004), we assume that exercitive acts change the boundaries of permissible or appropriate conduct. We postulate that progressive-form exercitive acts do not change these boundaries but rather describe an effort to do so. More generally, progressive performatives are action glosses like I’m trying to repair this; they explain the purpose of ongoing actions, both linguistic and nonlinguistic. This account naturally extends to non-exercitive progressive performatives like I’m withdrawing as a candidate

Classification of All Poisson-Lie Structures on an Infinite-Dimensional Jet Group

A local classification of all Poisson-Lie structures on an infinite-dimensional group $G_{\infty}$ of formal power series is given. All Lie bialgebra structures on the Lie algebra {\Cal G}_{\infty} of $G_{\infty}$ are also classified.Comment: 11 pages, AmSTeX fil

Scale-Free topologies and Activatory-Inhibitory interactions

A simple model of activatory-inhibitory interactions controlling the activity of agents (substrates) through a "saturated response" dynamical rule in a scale-free network is thoroughly studied. After discussing the most remarkable dynamical features of the model, namely fragmentation and multistability, we present a characterization of the temporal (periodic and chaotic) fluctuations of the quasi-stasis asymptotic states of network activity. The double (both structural and dynamical) source of entangled complexity of the system temporal fluctuations, as an important partial aspect of the Correlation Structure-Function problem, is further discussed to the light of the numerical results, with a view on potential applications of these general results.Comment: Revtex style, 12 pages and 12 figures. Enlarged manuscript with major revision and new results incorporated. To appear in Chaos (2006

Methods applied to investigage the major UVCE that occured in the TOTAL refiner's Fluid Catalytic Cracking Unit at La Mède, France

International audienceOn monday November 9, 1992 at 5:20 a.m. a major U. V.C.E, occured in the Gas Plant of the TOTAL refinery's Fluid Catalytic Cracking unit at La Mede, France. The origin was a 25 cm2 break in the 8" by-pass of the absorber stripper column cooler; an amount of about 15 tons of LPG and light naphtha was released within 10 minutes, covering an area of 14000m2 including Gas Plant, cryogenic, propene and Merox units before being ignited on the FCC main furnace

Geometric Universality of Currents

We discuss a non-equilibrium statistical system on a graph or network. Identical particles are injected, interact with each other, traverse, and leave the graph in a stochastic manner described in terms of Poisson rates, possibly dependent on time and instantaneous occupation numbers at the nodes of the graph. We show that under the assumption of constancy of the relative rates, the system demonstrates a profound statistical symmetry, resulting in geometric universality of the statistics of the particle currents. This phenomenon applies broadly to many man-made and natural open stochastic systems, such as queuing of packages over the internet, transport of electrons and quasi-particles in mesoscopic systems, and chains of reactions in bio-chemical networks. We illustrate the utility of our general approach using two enabling examples from the two latter disciplines.Comment: 15 pages, 5 figure

Stub model for dephasing in a quantum dot

As an alternative to Buttiker's dephasing lead model, we examine a dephasing stub. Both models are phenomenological ways to introduce decoherence in chaotic scattering by a quantum dot. The difference is that the dephasing lead opens up the quantum dot by connecting it to an electron reservoir, while the dephasing stub is closed at one end. Voltage fluctuations in the stub take over the dephasing role from the reservoir. Because the quantum dot with dephasing lead is an open system, only expectation values of the current can be forced to vanish at low frequencies, while the outcome of an individual measurement is not so constrained. The quantum dot with dephasing stub, in contrast, remains a closed system with a vanishing low-frequency current at each and every measurement. This difference is a crucial one in the context of quantum algorithms, which are based on the outcome of individual measurements rather than on expectation values. We demonstrate that the dephasing stub model has a parameter range in which the voltage fluctuations are sufficiently strong to suppress quantum interference effects, while still being sufficiently weak that classical current fluctuations can be neglected relative to the nonequilibrium shot noise.Comment: 8 pages with 1 figure; contribution for the special issue of J.Phys.A on "Trends in Quantum Chaotic Scattering

Toward an ecological aesthetics: music as emergence

In this article we intend to suggest some ecological based principles to support the possibility of develop an ecological aesthetics. We consider that an ecological aesthetics is founded in concepts as “direct perception”, “acquisition of affordances and invariants”, “embodied embedded perception” and so on. Here we will purpose that can be possible explain especially soundscape music perception in terms of direct perception, working with perception of first hand (in a Gibsonian sense). We will present notions as embedded sound, detection of sonic affordances and invariants, and at the end we purpose an experience with perception/action paradigm to make soundscape music as emergence of a self-organized system

Boundary effects on localized structures in spatially extended systems

We present a general method of analyzing the influence of finite size and boundary effects on the dynamics of localized solutions of non-linear spatially extended systems. The dynamics of localized structures in infinite systems involve solvability conditions that require projection onto a Goldstone mode. Our method works by extending the solvability conditions to finite sized systems, by incorporating the finite sized modifications of the Goldstone mode and associated nonzero eigenvalue. We apply this method to the special case of non-equilibrium domain walls under the influence of Dirichlet boundary conditions in a parametrically forced complex Ginzburg Landau equation, where we examine exotic nonuniform domain wall motion due to the influence of boundary conditions.Comment: 9 pages, 5 figures, submitted to Physical Review

Computation of saddle type slow manifolds using iterative methods

This paper presents an alternative approach for the computation of trajectory segments on slow manifolds of saddle type. This approach is based on iterative methods rather than collocation-type methods. Compared to collocation methods, that require mesh refinements to ensure uniform convergence with respect to $\epsilon$, appropriate estimates are directly attainable using the method of this paper. The method is applied to several examples including: A model for a pair of neurons coupled by reciprocal inhibition with two slow and two fast variables and to the computation of homoclinic connections in the FitzHugh-Nagumo system.Comment: To appear in SIAM Journal of Applied Dynamical System