Persistent stores abstract over all aspects of storage including the distinction between primary and secondary storage. One consequence of this abstraction is that the store appears to the user to be free from failure. Since computers are vulnerable to failure, persistent systems typically provide mechanisms to support this appearance of a failure-free store. These allow the system to recover a...

In sample surveys, it is usual to make use of auxiliary information to increase the precision of the estimators. We propose a new chain ratio estimator and regression estimator of a finite population mean using linear combination of two auxiliary variables and obtain the mean squared error (MSE) equations for the proposed estimators. We find theoretical conditions that make proposed estimators ...

The Electronic Product Code Information System (EPCIS) is a state of the art information system for tracking and monitoring the lifecycle of physical objects based on RFID technology. Low-cost passive RFID tags are replacing traditional barcodes for physical object identification and are heavily used within logistics and trade. They are an essential aspect of identifying physical objects, there...

For estimating the population variance S y of study variable y, a class of chain estimators of S y has been proposed in the presence of two auxiliary variables x and z by using known information on population mean and variance of the second auxiliary variable z. In this proposed class, the second auxiliary variable z is directly highly correlated with the first auxiliary variable x, whereas the...

We introduce a variant of the random oracle model where oracledependent auxiliary input is allowed. In this setting, the adversary gets an auxiliary input that can contain information about the random oracle. Using simple examples we show that this model should be preferred over the classical variant where the auxiliary input is independent of the random oracle. In the presence of oracle-depend...