We describe a design for a reputation system that increases the reliability and thus efficiency of remailer services. Our reputation system uses a MIX-net in which MIXes give receipts for intermediate messages. Together with a set of witnesses, these receipts allow senders to verify the correctness of each MIX and prove misbehavior to the witnesses. We suggest a simple model and metric for eval...

As decentralized computing scenarios get ever more popular, unstructured topologies are natural candidates to consider running mix networks upon. We consider mix network topologies where mixes are placed on the nodes of an unstructured network, such as social networks and scale-free random networks. We explore the efficiency and traffic analysis resistance properties of mix networks based on un...

This paper presents an annual multiobjective crop-mix planning as a problem of concurrent maximization of net profit and maximization of crop production to determine an optimal cropping pattern. The optimal crop production in a particular planting season is a crucial decision making task from the perspectives of economic management and sustainable agriculture. A multiobjective optimal crop-mix ...

Introduction Most developed countries use case-mix systems (APRDRG-type) to define the prospective budgets of their hospitals. However, these case-mix systems are based mainly on the main diagnosis and procedures and do not take into account the specificity of geriatric patients. In the present study, we use all geriatric tools (RAI, RUGs, RIM, etc.) to evaluate the needs of acute geriatric hos...

Background Emergency departments (EDs) have a different case-mix than traditional medical and surgical departments. Knowledge of what complaints patients present with at EDs and their incidence is needed. Previous studies on ED case-mix have largely focused on the incidence of different diagnoses. This study aims to create a number of categories that cover the majority of presenting complaints ...