A cornerstone of quantum mechanics is the characterization symmetries provided by Wigner's theorem. theorem establishes that every symmetry state space must be either a unitary transformation or an antiunitary transformation. Here we extend from states to evolutions, including both deterministic evolution associated with dynamics closed systems and stochastic evolutions outcomes measurements. W...

This paper estimates a 7 variable TVP-VAR on US data using kernel methods. We identify monetary policy shocks using sign restrictions for each period in our sample. We then fit the SmetsWouters (2007) model to these impulse responses, tracing out evolutions in the structural DSGE parameters over time. Parameters defining nominal rigidities move a lot. Some real side ones move a lot (investment ...

Most online evolution of application depends on its runtime environment. This paper addresses how to support online evolution by application server, which is considered as third kind of system software, besides OS and DBMD. From view of requirements, evolutions of software can be divided into four categories: evolutions that do not alter requirements, evolutions that alter functional requiremen...

This paper outlines evolutions in the underlying logic of corporatist policymaking in Western Europe. Starting from the discrepancy between the observable decline in the power of organised labour on the one hand, and the persistence of corporatist concertation as a mode of policymaking on the other, the paper outlines the remaining incentives for governments to involve trade unions and employer...

The PEGASE project aims at grid management tools to achieve an integrated security analysis and control of the European Transmission Network (ETN). Today the paradigm of this system has changed: interconnections are reinforced for market reasons and not any more just for reserve sharing. Moreover, new interconnections are planned (Turkey) or contemplated (for instance the Mediterranean ring or ...

Phase changes ............................................................................................................................................... 1 Phase rule .................................................................................................................................................. 2 Clapeyron equation .............................................................

Database systems offering a multidimensional schema on a logical level (e.g. OLAP systems) are often used in data warehouse environments. The user requirements in these dynamic application areas are subject to frequent changes. This implies frequent structural changes of the database schema. In this paper, we present a formal framework to describe evolutions of multidimensional schemas and thei...

We study how hard is to determine some fundamental properties of dynamics of certain types of network automata. We address the computational complexity of determining how many different possible dynamic evolutions can arise from some structurally very simple, deterministic and sparsely connected network automata. In this as well as our prior, related work, we try to push the limits on the under...