1,721,010 research outputs found
Pahlavi Texts from Codex MK. Critical Edition, Translation and Commentary
No full textThis article describes the main features of Carlo Marchetti's PhD thesis ‘Testi pahlavī dal codice MK. Edizione critica, traduzione e commento’ completed in 2021 under the supervision of Professors Carlo G. Cereti and Gianfilippo Terribili from Sapienza University of Rom
Diritti dei soci, interesse sociale e funzionamento dell’assemblea: spunti dalle norme di emergenza
No full textL'articolo esamina gli aspetti più rilevanti della normativa di emergenza Covid-19 con riferimento al funzionamento degli organi collegiali delle società di capitali, sia per quanto riguarda i profili di interpretazione delle norme vigenti sia nella prospettiva della futura evoluzione della disciplina del diritto societario modern
Note sulle assemblee tramite rappresentante designato
No full textIl lavoro esamina la procedura innovativa attraverso la quale le assemblee degli azionisti possono tenersi secondo la legge italiana, ovvero senza tenere un’assemblea vera e propria in presenza di tutti gli azionisti, ma in cui una fase di domande e/o proposte precede la data del voto, e gli azionisti possono votare attraverso una delega ad hoc organizzata dalla società stessa. Questo sistema - in italiano "rappresentante designato” - era stato introdotto durante la pandemia Covid per necessità, ma si è dimostrato efficiente ed efficace e il Legislatore ne ha recentemente esteso la disponibilità. Sono discussi prima dei pro e dei contro del sistema esprimendo una valutazione positiva; in secondo luogo, si esaminano alcune questioni interpretative e pratiche; in terzo luogo, vengono offerte alcune proposte per promuovere il nuovo strumento
Active software replication through a three-tier approach
No full textA replication logic is the set of protocols and mechanisms implementing a software replication technique. A three-tier approach to replication consists in separating the replication logic from both clients and replicated servers by embedding such logic in a middle-tier. In this paper we first introduce the fundamental concepts underlying three-tier replication. This approach has two main practical advantages: (i) it allows to maintain consistency among the state of server replicas deployed within an asynchronous distributed system and (ii) it supports very thin clients. Then we present the Interoperable Replication Logic (IRL) architecture, which is a Fault Tolerant CORBA compliant infrastructure exploiting a three-tier approach to replicate stateful deterministic CORBA objects. In this context, we illustrate the three-tier replication protocol currently implemented in our IRL prototype and a performance analysis that shows the feasibility of the three-tier approach to software replication
A Three-tier Active Replication Protocol for Large Scale Distributed Systems
No full textThe deployment of server replicas of a service across an asynchronous distributed system (e.g., Internet) is a real practical challenge. This target cannot be indeed achieved by classical software replication techniques (e.g., passive and active replication) as these techniques usually rely on group communication toolkits that require server replicas to run over a partially synchronous distributed system to solve the underlying agreement problem. This paper proposes a three-tier architecture for software replication that encapsulates the need of partial synchrony in a specific software component of a mid-tier to free replicas and clients from the need of underlying partial synchrony assumptions. Then we propose how to specialize the mid-tier in order to manage active replication of server replicas
A classification of total order specifications and its application to fixed sequencer-based implementations
No full textDuring the last two decades the design and development of total order (TO) communications has been one of the main research topics in dependable distributed computing. The huge amount of research work has produced several TO specifications and a wide variety of TO implementations with different guarantees whose differences are often left hidden or unclear. This paper presents a systematic classification of six distinct TO specifications based on a well-defined formal framework. The classification allows us (i) to define in a formal way the differences among the behaviors of faulty and correct processes admitted by each specification, and (ii) to easily match TO implementations with respect to their enforced specification. The classification is applied to study the properties of eight variations of TO implementations based on a fixed sequencer given in a well-known context, namely primary component group communication systems. (c) 2005 Elsevier Inc. All rights reserved
Antiquities from Hatra in the Slemani Museum (Sulaymaniyah, Kurdistan, Iraq)
No full textDuring fieldwork in 2019, the Italian Archaeological Mission in Iraqi Kurdistan (MAIKI) uncovered a previously unpublished stone block inscribed with a Hatran Aramaic inscription among the artefacts from Paykuli in the Slemani Museum. In this article, we present the results of the survey of the collections that followed this discovery, including a catalogue of the antiquities from Hatra in the museum and the edition of the new text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Content-based publish-subscribe over structured overlay networks
No full textThis paper introduces a novel architecture for implementing content-based pub/sub communications on top of structured overlay networks. This architecture overcomes some well-known limitations of existing infrastructures, i.e. lack of self-configuration and of adaptiveness to dynamic changes. This is achieved by devising a mediator stratum between the rich event subscription semantics of content-based pub/sub systems and the standard logical addressing scheme of overlays. The paper describes details of the design and provides considerations in selecting the subscription-to-node and event-to-node mappings suitable for the solution. We identify the lack of native support for one-to-many communication by overlay networks as the main impediment for efficient system operation. The paper introduces a novel primitive for one-to-many message delivery, showing through simulation how this can improve performance of the architecture. The simulation study also shows performance comparison between the different mappings proposed as well as evaluation of other optimizations discussed in the paper. © 2005 IEEE
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