This study evaluated how individuals living on the Gulf Coast perceived hurricane risk after Hurricanes Katrina and Rita. It was hypothesized that hurricane outlook and optimistic bias for hurricane risk would be associated positively with distance from the Katrina-Rita landfall (more optimism at greater distance), controlling for historically based hurricane risk and county population density,...

Studies in [7, 8, 91 concluded that for a variety of reasons, optimistic concurrency control appears well-suited to real-time database systems. Especially, they showed that in a real-time database system that discards tardy transactions, optimistic concurrency control outperforms locking. In this paper, we show that the optimistic algorithms used in those studies incur restarts unnecessary to e...

The present studies examined cognitive processes underlying the tendency to underestimate project completion times. Two experiments tested the hypothesis that people generate overly optimistic predictions, in part, because they focus narrowly on their future plans for the target task and thus neglect other useful sources of information. Consistent with the hypothesis, instructing participants t...

Optimistic replication of data is becoming increasingly popular in mobile environments, but its pelformance and scaling characteristics are not well understood. This paper presents a simulation evaluation of optimistic replicated filing in a mobile environment. We first compare full and selective optimistic replication systems to capture the properties required for scaling. We then show that th...

Optimistic concurrency control highly takes advantage of parallelism because there is no delay by lock. Unfortunately, I/O operations by transactions and cache operations are delayed in the optimistic concurrency control. In order to reduce such delay, we combine cache coherency control and optimistic concurrency control rather than they operate in separate. In this paper, we propose optimistic...

in this paper, a new revenue efficiency data envelopment analysis (re-dea) approach is considered for finding the most revenue efficient unit with price uncertainty in both optimistic and pessimistic perspectives. the optimistic and pessimistic perspectives use efficient frontier and inefficient frontier, respectively. an integrated model is introduced to find decision making units (dmus) that ...