In proxy re-encryption (PRE), a semi-trusted proxy can transform a ciphertext under the delegator’s public key into another ciphertext that the delegatee can decrypt by his/her own private key. However, the proxy cannot access the plaintext. Due to its transformation property, proxy re-encryption can be used in many applications, such as encrypted email forwarding. Some of these applications re...

In the proxy approach to Service Oriented Computing, a service advertises a proxy, which is searched for, retrieved and used by interested clients as a local handle to the service process that runs on a remote host. Due to software evolution, it becomes necessary at times to upgrade the service. Some of these upgrades may require an upgrade of the proxy software, in addition to the server itsel...

In well control optimization for an oil reservoir described by a set of geological models, the expectation of net present value (NPV) is optimized. This approach called robust optimization, entails running the reservoir simulator for all the reservoir models at each iteration of the optimization algorithm. Hence, robust optimization can be computationally demanding. One way to reduce the comput...

in this paper i develop a proxy means tests (pmt) model and examine several targeting lines based on 2008 household survey data to identify beneficiaries for a targeting subsidy scheme in iran. based on the findings of this study, setting a cut-off percentile of 40% is expected to provide compensation for almost 70 percent of the poorest households. this will result in the highest accuracy main...

5 In groundwater modeling, Monte Carlo Markov Chain (MCMC) simulations are often used to calibrate aquifer parameters and propagate the uncertainty to the quantity of interest (e.g., pollutant concentration). However, this approach requires a large number of flow simulations and incurs high computational cost, which prevents a systematic evaluation of the uncertainty in presence of complex phys...

Proxy-network based overlays have been proposed to protect Internet applications against Denial-of-Service (DoS) attacks by hiding an application’s location. We develop a formal framework which models attacks, defensive mechanisms, and proxy networks. We use the framework to analyze the general effectiveness of proxy network schemes to protect applications. Using our formal model, we analytical...

The most important predictor in a regression model may be a suppressor variable which does not predict the outcome variable directly but improves the overall prediction by enhancing the effects of other predictors in the model. The most important gene in a 9gene model for early detection of prostate cancer is the gene SP1, whose mean is not significantly different between cancer and medically d...

....................................................................ii List of Tables.............................................................. v List of Figures............................................................ vi Acknowledgements..........................................................vii 1. CHAPTER ONE: INTRODUCTION............................................... 1 2. CHAPTER T...