Past matters: Supporting LTL+past in the BLACK satisfiability Checker

LTL+Past is the extension of Linear Temporal Logic (LTL) supporting past temporal operators. The addition of the past does not add expressive power, but does increase the usability of the language both in formal verification and in artificial intelligence, e.g., in the context of multi-agent systems. In this paper, we add the support of past operators to BLACK, a satisfiability checker for LTL based on a SAT encoding of a tree-shaped tableau system. We implement two ways of supporting the past in the tool. The first one is an equisatisfiable translation that removes the past operators, obtaining a future-only formula that can be solved with the original LTL engine. The second one extends the SAT encoding of the underlying tableau to directly support the tableau rules that deal with past operators. We describe both approaches and experimentally compare the two between themselves and with the nuXmv model checker, obtaining promising results

Il fascicolo elettronico

Il volume raccoglie i contributi dei relatori che hanno partecipato al seminario di studi sul \u201cfascicolo elettronico\u201d, svoltosi a Roma il 9 luglio 2010 presso l\u2019Accademia dei Lincei, i quali hanno trattato i temi dell\u2019organizzazione dei contenuti digitali e della formazione della memoria digitale sotto tutti gli aspetti: sotto il profilo archivistico, precisando la natura, le caratteristiche e la funzione del fascicolo ai fini di una corretta gestione documentale; in rapporto ai vincoli imposti dalla normativa vigente; con riferimento alle raccomandazioni internazionali sulla gestione informatica dei documenti; sotto il profilo dell\u2019innovazione connessa alla particolare natura del fascicolo elettronico; sotto l\u2019aspetto applicativo, illustrando le funzioni di un ERMS (Electronic Record Management System)

A pilot evaluation of the Strengthening a Palliative Approach in Long-Term Care (SPA-LTC) program.

BACKGROUND:Despite increased annual mortality in long-term care (LTC) homes, research has shown that care of dying residents and their families is currently suboptimal in these settings. The purpose of this study was to evaluate resident and family outcomes associated with the Strengthening a Palliative Approach in LTC (SPA-LTC) program, developed to help encourage meaningful end of life discussions and planning. METHODS:The study employs a mixed method design in four LTC homes across Southern Ontario. Data were collected from residents and families of the LTC homes through chart reviews, interviews, and focus groups. Interviews with family who attended a Palliative Care Conference included both closed-ended and open-ended questions. RESULTS:In total, 39 residents/families agreed to participate in the study. Positive intervention outcomes included a reduction in the proportion of emergency department use at end of life and hospital deaths for those participating in SPA-LTC, improved support for families, and increased family involvement in the care of residents. For families who attended a Palliative Care Conference, both quantitative and qualitative findings revealed that families benefited from attending them. Residents stated that they appreciated learning about a palliative approach to care and being informed about their current status. CONCLUSIONS:The benefits of SPA-LTC for residents and families justify its continued use within LTC. Study results also suggest that certain enhancements of the program could further promote future integration of best practices within a palliative approach to care within the LTC context. However, the generalizability of these results across LTC homes in different regions and countries is limited given the small sample size

Active Rab11 and functional recycling endosome are required for E-cadherin trafficking and lumen formation during epithelial morphogenesis

Epithelial biogenesis requires the organized assembly of cell-cell contacts and establishment of apical-basal polarity. In polarized cells, the apical and basolateral membranes are segregated, each having different lipid and membrane protein compositions (14, 26, 44)