Propositional Dynamic Logic for Message-Passing Systems

We examine a bidirectional propositional dynamic logic (PDL) for finite and infinite message sequence charts (MSCs) extending LTL and TLC-. By this kind of multi-modal logic we can express properties both in the entire future and in the past of an event. Path expressions strengthen the classical until operator of temporal logic. For every formula defining an MSC language, we construct a communicating finite-state machine (CFM) accepting the same language. The CFM obtained has size exponential in the size of the formula. This synthesis problem is solved in full generality, i.e., also for MSCs with unbounded channels. The model checking problem for CFMs and HMSCs turns out to be in PSPACE for existentially bounded MSCs. Finally, we show that, for PDL with intersection, the semantics of a formula cannot be captured by a CFM anymore

The Children\u27s Community Center

We are the Children’s Community Center, a NGO thats wants to provide an emergency response to the new surge of Rohingya refugee children. We want to relieve the daily mental traumas of the refugee camps through the collaborative interaction of the different children within the camps. This center will also give parents the space to focus on their own healing without the preoccupation of childcare. Nexus Maximus IV The Challenge: Innovation for Refugees and Displaced Populations One of the great challenges of our time is how to help refugees and displaced populations, and how to prevent the causes in the first place. Every minute, 24 people around the world are forced to flee their homes. That’s 34,000 people a day who leave everything behind in the hope of finding safety and a better tomorrow. The impact of war, political, racial and religious conflict, and environmental crises of famine and climate change, have caused great suffering and there is a great opportunity to do better. The issues these populations and the countries who receive them face are diverse and complex. They include public health, housing/built environment, cultural integration, public safety, employment/economic and more. How can innovation address these challenges? How do we create the social systems and products to support a healthy, safe and integrated program for refugees? How do we address the physical, emotional, and social needs of refugees to restore hope and opportunity? The solutions may be as far ranging as the challenges, exploring the acute needs during a crisis, as well as the chronic needs of the permanently displaced; looking at immigration and adjustments to new cultures. We encourage participants to draw upon all disciplines, from health professions to architecture, engineering to design, ethics, communication and every way of thinking we have, to find better ways to innovate on physical solutions, processes, policies, systems, and more. Recap of poster presentationshttps://jdc.jefferson.edu/nexusmaximus/1011/thumbnail.jp

Preliminary Ecological Assessment of Waller Creek

This report assesses the ecological character of Waller Creek. This includes a general description, its physical setting, vegetation and habitat descriptions, ecological value indexes, and other ecological metrics.Waller Creek Working Grou

Capstone 2019 Art and Art History Senior Projects

This booklet profiles Art Senior Projects by Angelique J. Acevedo, Arin Brault, Bailey Harper, Sue Holz, Yirui Jia, Jianrui Li, Annora B. Mack, Emma C. Mugford, Inayah D. Sherry, Jacob H. Smalley, Laura Grace Waters and Laurel J. Wilson. This booklet profiles Art History Senior Projects by Gabriella Bucci, Melissa Casale, Bailey Harper, Erin O\u27Brien and Laura Grace Waters

Some implications for Alaska of petroleum development on the Norwegian Continental Shelf

In January 1978, Senator Mike Gravel travelled in Norway to obtain information on Norwegian reactions to petroleum development on the continental shelf of the North and Norwegian Seas. This report presents some implications of Norwegian experiences which may be relevant to Alaska as developed by two University of Alaska professors who accompanied Senator Gravel and his assistant C. Deming Cowles.Introduction -- Background -- Current status -- North Norwegian oil development -- Petro-chemical industries (Bamble) -- Comments on the impact of petroleum development on Stavanger -- Continental shelf surveillance, the Bravo Blow-Out and pollution control -- Some concluding comments -- References -- Bibliography