State retrieval beyond Bayes' retrodiction

Spin-measurement retrodiction revisited

The retrodiction of spin measurements along a set of different axes is revisited in detail. The problem is presented in two different pictures, a geometric and a general algebraic one. Explicit measurement operators that allow the retrodiction are given for the case of three and four axes. For the Vaidman-Aharanov-Albert case of three orthogonal axes the quantum network is constructed for two d...

Beyond Document Retrieval toward Information Retrieval

Resolution of a " Retrodiction Paradox "

It is shown that the " retrodiction paradox " recently introduced by Peres arises not because of the fallacy of the time-symmetric approach as he claimed, but due to an inappropriate usage of retrodiction.

Session State: Beyond Soft State

The cost and complexity of administration of large systems has come to dominate their total cost of ownership. Stateless and soft-state components, e.g. Web servers or network routers, are easy to manage: capacity can be scaled incrementally by adding more nodes, rebalancing of load after failover is easy, and reactive or proactive (“rolling”) reboots can be used to handle transient failures. W...

Information Extraction: Beyond Document Retrieval

In this paper we give a synoptic view of the growth text processing technology of information extraction (IE) whose function is to extract information about a pre-specified set of entities, relations or events from natural language textsand to record this information in structured representations called templates. Here we describe the nature of the IE task, review the history of the area from i...