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Manganese Abundances in Cluster and Field Stars

We have derived Mn abundances for more than 200 stars in 19 globular clusters. In addition, Mn abundance determinations have been made for a comparable number of halo field and disk stars possessing an overlapping range of metallicities and stellar parameters. Our primary data set was comprised of high-resolution spectra previously acquired at the McDonald, Lick, and Keck Observatories. To enlarge

Equity and Distribution of Water Resources in Kgatleng District, Botswana

The focus in this article is on investigating the distribution of water resources in Botswana’s Kgatleng District and specifically to analyse the principles guiding existing African customary property rights institutions from an equity perspective. In Botswana accessing water resources and controlling the use of water sources is imperative for agricultural production. Development of water sources

Synchronization of a TDMA-OFDM frequency hopping system

We present a time division multiple access-orthogonal frequency division multiplexing (TDMA-OFDM)-based radio interface proposal for the Universal Mobile Telecommunication System (UMTS). We focus on synchronization and present an implementable algorithm for the tracking of the mobiles' time and frequency offsets at the base station in the uplink. This algorithm is based on estimation methods that