Parameters of Integral Circulant Graphs and Periodic Quantum Dynamics

The intention of the paper is to move a step towards a classification of network topologies that exhibit periodic quantum dynamics. We show that the evolution of a quantum system, whose hamiltonian is identical to the adjacency matrix of a circulant graph, is periodic if and only if all eigenvalues of the graph are integers (that is, the graph is integral). Motivated by this observation, we focus on relevant properties of integral circulant graphs. Specifically, we bound the number of vertices of integral circulant graphs in terms of their degree, characterize bipartiteness and give exact bounds for their diameter. Additionally, we prove that circulant graphs with odd order do not allow perfect state transfer.Comment: 12 page

Renegotiating Responsibilities in Human-Computer Ensembles

This paper proposes discussions for the (re)negotiation of responsibilities in performances that involve a collaboration between human and computer agents. Most of current research is human-hierarchical, leaving the machine the role of a mere tool at performer’s service. In this paper a more balanced distribution of responsibilities between the two agent is proposed. Chimney, a software developed by one of the authors, is proposed as a design probe to reflect on this topic. Chimney allows the composer to control only the musical material of a piece, leaving its evolution to an algorithmic agent whose decisions are unpredictable. This redistribution of responsibilities results in a compositional shift that causes the roles of the composer / performer to overlap. The implications for the experience of the performer operating Chimney are also discussed

I cento anni di Piero Fiorelli

Piero Fiorelli, insigne storico del diritto e della lingua, professore di storia del diritto italiano all’Università di Firenze e accademico della Crusca, è stato il primo direttore dell’Istituto per la documentazione giuridica (Idg) di Firenze, costituito nel maggio 1968 e confluito, dopo aver assunto dal 2002 il nome di Istituto di teoria e tecniche dell’informazione giuridica (Ittig), nell’attuale Istituto di informatica giuridica e sistemi giudiziari. A lui si deve l’intensa attività di preparazione, di organizzazione e di direzione che ha portato l’Istituto a muovere i primi passi e ha accompagnato l’iniziale sviluppo di linee di ricerca che sarebbero state consolidate nei successivi anni, ormai più di cinquanta, di vita dell’Idg/Ittig/Igsg. Questo compleanno, particolarmente significativo per l’Istituto, coincide con altri due anniversari: i cento anni dalla nascita del Consiglio nazionale delle ricerche, costituito con regio decreto del 18 novembre 1923, e i sessanta anni dalla legge n. 283 del 1963 con cui le discipline umanistiche sono entrate nel raggio d’azione del CNR. Questo intreccio di celebrazioni ha indotto la Rivista dell'Istituto a scegliere, per rendere omaggio al professor Fiorelli, di pubblicare due suoi testi che testimoniano l’attenzione da lui dedicata all’Istituto e il ruolo che egli ha rivestito nel CNR, in anni cruciali della sua storia. Il primo testo è la prima relazione presentata dal professor Fiorelli quale direttore dell’Idg, a due anni e mezzo dalla fondazione dell’Istituto, già pubblicata nella rivista del CNR “La ricerca scientifica”, nel numero di gennaio-febbraio 1972, che testimonia l’impegno profuso nei primi anni di vita dell’Idg e il rigore metodologico con cui è stato organizzato il lavoro per la redazione del Vocabolario giuridico. Il secondo è la trascrizione del discorso tenuto il 18 maggio 2018, in occasione dei festeggiamenti per i cinquant’anni dell’Idg/Ittig

Investigation Into the Humaneness of Slaughter Methods for Guinea Pigs (Cavia porcelus) in the Andean Region

Guinea pigs (Cavia porcelus) are an important source of nonhuman animal protein in the Andean region of South America. Specific guidelines regarding the welfare of guinea pigs before and during slaughter have yet to be developed. This study critically assessed the humaneness of 4 different stunning/slaughter methods for guinea pigs: cervical neck dislocation (n = 60), electrical head-only stunning (n = 83), carbon dioxide (CO(2)) stunning (n = 21), and penetrating captive bolt (n = 10). Following cervical neck dislocation, 97% of guinea pigs had at least 1 behavioral or cranial/spinal response. Six percent of guinea pigs were classified as mis-stunned after electrical stunning, and 1% were classified as mis-stunned after captive bolt. Increased respiratory effort was observed during CO(2) stunning. Apart from this finding, there were no other obvious behavioral responses that could be associated with suffering. Of the methods assessed, captive bolt was deemed the most humane, effective, and practical method of stunning guinea pigs. Cervical neck dislocation should not be recommended as a slaughter method for guinea pigs

Rendiconti dell'Istituto di Matematica dell'Università di Trieste. An International Journal of Mathematics. Vol. 46 (2014)

Rendiconti dell’Istituto di Matematica dell’Università di Trieste was founded in 1969 by Arno Predonzan, with the aim of publishing original research articles in all fields of mathematics and has been the first Italian mathematical journal to be published also on-line. The access to the electronic version of the journal is free. All published articles are available on-line. The journal can be obtained by subscription, or by reciprocity with other similar journals. Currently more than 100 exchange agreements with mathematics departments and institutes around the world have been entered in

Rendiconti dell'Istituto di Matematica dell'Università di Trieste. An International Journal of Mathematics. Vol. 44 (2012)

Rendiconti dell’Istituto di Matematica dell’Università di Trieste was founded in 1969 by Arno Predonzan, with the aim of publishing original research articles in all fields of mathematics and has been the first Italian mathematical journal to be published also on-line. The access to the electronic version of the journal is free. All published articles are available on-line. The journal can be obtained by subscription, or by reciprocity with other similar journals. Currently more than 100 exchange agreements with mathematics departments and institutes around the world have been entered in

Infrastructure-less prioritised communication platform for first responders

Infrastructure-less environments present unique challenges in emergency environments, where resources are scarce, and information needs to be shared in an efficient manner. With the use of Internet of Things technology in emergency response situations, the amount of information generated can be overwhelming for both the first responders (FRs) and the infrastructure-less network that might connect them. Therefore, architectures need to be implemented that can prioritize and regulate this information before displaying it to the FRs or sending it over in an efficient manner. This article introduces such an architecture and the core tools that comprise it. This work is part of the RESCUER project, an EU-funded project aiming at developing an FR-centered technology toolkit that will empower the next generation of FRs by enhancing their operational capacity and safety, specifically in adverse conditions, both environmental and infrastructure-wise