We consider a two-stage decision problem, in which an online retailer first makes optimal decisions on his profit margin and free-shipping threshold, and then determines his inventory level. We start by developing the retailer’s expected profit function. Then, we use publiclyavailable statistics to find the best-fitting distribution for consumers’purchase amounts and the best-fitting function f...

High-performance analog-to-digital converters, digital-to-analog converters, and fractionalfrequency synthesizers based on delta–sigma ( ) modulation—collectively referred to as data converters—have contributed significantly to the high level of integration seen in recent commercial wireless handset transceivers. This paper presents a tutorial on data converters and their uses and implications ...

Although all conventional voice conversion approaches require equivalent training utterances of source and target speaker, several recently proposed applications call for breaking this demand. In this paper, we present an algorithm which finds corresponding time frames within unaligned training data. The performance of this algorithm is tested by means of a voice conversion framework based on l...

Migration concerns saving the current computation state, transferring it to remote machines, and resuming execution at the statement following the migration point. Checkpointing concerns saving the computation state to file systems and resuming execution by restoring the computation state from saved files. Although the statetransfer medium differs, migration and checkpointing share the same str...

We report on ongoing work in Europeana on the conversion of EADXML based archival data to an RDF-based representation using the newly developed “Europeana Data Model” (EDM) ontology.

Streamlined and efficient data maintenance processes are crucial to maintaining a GIS. Re-engineering of existing business processes in advance of data conversion is at the heart of ensuring that data is effectively maintained during and after conversion. Charlotte-Mecklenburg Utilities, (Utilities) has initiated a GIS Foundation project to convert its water and sewer system data into a GIS. Th...

Data acquisition and conversion systems interface between the real world of physical parameters, which are analog, and the artificial world of digital computation and control. With current emphasis on digital systems, the interfacing function has become an important one; digital systems are used widely because complex circuits are low cost, accurate, and relatively simple to implement. In addit...

Data acquisition and conversion systems interface between the real world of physical parameters, which are analog, and the artificial world of digital computation and control. With current emphasis on digital systems, the interfacing function has become an important one; digital systems are used widely because complex circuits are low cost, accurate, and relatively simple to implement. In addit...