We link the weighted maximum entropy and the optimization of the expected Fβmeasure, by viewing them in the framework of a general common multi-criteria optimization problem. As a result, each solution of the expected Fβ-measure maximization can be realized as a weighted maximum likelihood solution a well understood and behaved problem. The specific structure of maximum entropy models allows us...

We investigate the trade-off between energy consumption and delay for critical data collection in low duty cycle wireless sensor networks, where a causality constraint exists for routing and link scheduling. We characterize the energy-delay region (E-D region) and formulate a combinatorial optimization problem to determine the link scheduling with the causality constraint. A new multiple-degree...

In this paper we report on the system design and a realtime implementation of a MIMO-OFDM radio transmission system close to physical layer parameters as discussed in standardization for 3GPP-Long-Term-Evolution. We describe the implementation concept and first results on over-the-air transmission with a single user set-up occupying 20 MHz bandwidth and achieving more than 150 Mbit/s gross data...

We link the weighted maximum entropy and the optimization of the expected Fβmeasure, by viewing them in the framework of a general common multi-criteria optimization problem. As a result, each solution of the expected Fβ-measure maximization can be realized as a weighted maximum likelihood solution a well understood and behaved problem. The specific structure of maximum entropy models allows us...

It has become increasingly common to produce goods in a number of geographically dispersed stages linked by international trade. This tendency, known by names such as “production fragmentation”, “processing trade”, and “vertical specialization”, has important implications for the analysis of nontariff measures (NTMs) and trade facilitation. First, different types of NTMs or trade facilitation i...

With the ever increasing volume of information over wireless medium, security has assumed an important dimension. The security of transmitted data over a wireless channel aims at protecting the data from unauthorized intrusion. Wireless network security is achieved using cryptographic primitives. Some properties that give encryption mechanism their cryptographic strength also make them very sen...

Whereas theoretical analyses of trade and environment indicate that relatively strict environmental policies can have a strong impact on foreign trade, empirical studies present mixed results. This study presents new empirical results that tie together two previous empirical studies employing a multicountry econometric framework, notably Tobey (1990, 1993) and van Beers and van den Bergh (1997)...

The measurement of impediments to trade in services within the APEC region is addressed in this paper. This work builds upon major methodological and practical issues encountered in measuring such impediments in the 1995 PECC Survey of Impediments to Trade and Investment in the APEC Region. Conceptual and measurement issues in deriving partial equilibrium estimates of the effects of service tra...

This paper examines the effects of trade openness on the optimal incentives firms provide to their managers (and hence firm-level productivity) in the new heterogeneous-firm trade framework. Export market selection and firm heterogeneity are shown to be the key determinants of firm owners’ optimal choices of the incentive contracts, which affect the cost-reduction efforts of their managers. I s...