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PubblicazioneTheory of high energy scattering and multiple production( 1962)
;Amati, Daniele ;Fubini S.Stanghellini A.In questo lavoro si propone una teoria per lo studio delle interazioni forti di alta. energia. L‘idea di base è che i processi di alta energia sono riconducibili, attraverso un meccanismo periferico, a processi di bassa energia. Le proprietà asintotiche di questo modello vengono studiate per mezzo di un‘equazione integrale agli autovalori, il cui nuoleo è funzione delle ampiezze dei processi di bassa energia. Si mostra come molte predizioni generali possono essere derivate dalla struttura dell‘equazione integrale senza conoscere la soluzione esplicita di questa. I risultati riguardano tanto l‘urto elastico come la produzione multipla di alta energia. Per i processi inelastici noi otteniamo semplici predizioni generali per quel che riguarda la natura, la molteplicità, l‘inelasticità e lo spettro dei secondari. Per l‘urto elastico, noi troviamo il caratteristico comportamento del polo di Regge per le ampiezze. Questo ci permette di capire la relazione tra stati legati e diffrazione in un modello relativistico che contiene entrambi. Si discutono infine alcune correzioni al modello imposto dall‘unitarietà ; queste correzioni suggeriscono l‘esistenza di una continuità di poli di Regge, cioè di tagli nel piano del momento angolare complesso.Scopus© Citazioni 492 2 -
PubblicazioneTheories and experiments on discrimination times( 1964)
;Shallice, TimothyVICKERS D.Three models to account for discrimination times are examined : one being derived from information-theory, another being Grossman's Confusion Function and the third a form of Sequential Sampling model. Four experiments, using card-sorting tasks in which lines of different lengths had to be discriminated, wore conducted and the results compared with those of previous experiments. It was concluded that : 1.Experiments in this field may be divided hi to two types. Ono type (A) involves a series of judgments the difficulty of which differs randomly from one to another. The either type (B) involves a series of judgments all of the same degree of difficulty. Type B results in the present experiments were fitted moderately well by Crossman's Confusion Function, and somewhat less well by the Sequential Sampling model. They were not well fitted by the information-theory model. Type A results had previously been shown to be well fitted by an information-theory model when each individual discrimination was separated in time from others. It was found that when discriminations were made as a continuous series, the relationship between difficulty and discrimination time broke down2 -
PubblicazioneThe detection of change and the perceptual moment hypothesis( 1964)Shallice, Timothy
Scopus© Citazioni 47 5 -
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PubblicazioneA necessary and sufficient condition for convergence of real-valued functions( 1966)Vidossich, Giovanni
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PubblicazioneTemporal summation and absolute brightness thresholds( 1967)Shallice, TimothyThree normative models based on the Change Detector analogies of Shallice (1964) are investigated to see how well they account for the integration of input over time that occurs in absolute brightness threshold experiments. Of the three, the geometric moving average receives no support. The perceptual moment and moving average models give about equally satisfactory but not perfect fits for short flash results, but the perceptual moment model is much more satisfactory for long flash results. The analysis takes into account variations in information transmission times, noise in the visual system and the quantal nature of the light input. The locus of temporal integration is discussed and a central locus preferred, following Treisman (1966).
Scopus© Citazioni 8 3 -
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PubblicazioneOn topological spaces whose functions space is of second category( 1969)Vidossich, Giovanni
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PubblicazioneA theorem on uniformly continuous extensions of mappings defined in finite-dimensional spaces( 1969)Vidossich, GiovanniWe prove a theorem on uniformly continuous extensions of mappings defined in spaces whose uniformities have a base of finite-dimensional uniform coverings. This theorem includes a theorem of M. Katětov.
Scopus© Citazioni 4 2 -
PubblicazioneA note on cardinal reflections in the category of uniform spaces( 1969)Vidossich, Giovanni
Scopus© Citazioni 5 5 -
PubblicazioneThe selective impairment of auditory verbal short-term memory( 1969)
;WARRINGTON EKShallice, TimothyScopus© Citazioni 413 8 -
PubblicazioneOn the representation of uniform structures by extended reticles( 1969)Vidossich, G.An extended reticle R on a topological space X is a nonempty family of ordered pairs (A,B) such that (i) A is closed and B is open, (ii) A⊂B, (iii) if (A,B)∈R then (X−B,X−A)∈R, (iv) (A,B)∈R implies the existence of an open set B∗ and a closed set A∗ such that (A,B∗)∈R, B∗⊂A∗ and (A∗,B)∈R, (v) {(Ai,Bi):i∈I} is in R and {Bi:i∈I} is locally finite implies (⋃i∈IAi,⋃i∈IBi)∈R. If in (v) |I|≤k. then it is called a k-extended reticle. Main results: (1) Every proximity class of uniformities contains at most one k-uniformity associated with a k-extended reticle; if it contains one then it is the finest member. (2) X is pseudocompact if and only if the finest precompact uniformity on X having topology coarser than that of X is the א0-uniformity associated with an א0-extended reticle on X. (3) There is a proximity class of uniformities on the real line (with the usual topology) such that none of its members is the k-uniformity associated with a k-extended reticle, k an arbitrary infinite cardinal. This last result answers negatively a question posed by G. Aquaro [Ann. Mat. Pura Appl. (4) 47 (1959), 319–389
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PubblicazioneCharacterizing separability of function spaces( 1970)Vidossich, Giovanni
Scopus© Citazioni 9 4 -
PubblicazioneIndependent functioning of verbal memory stores: a neuropsychological study( 1970)
;Shallice, TimothyWARRINGTON EKScopus© Citazioni 452 17 -
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