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Static mechanical properties of acrylic bone cements containing an organobismuth compound as a radiopacifier

The inclusion of triphenyl bismuth (TPB) as an alternative radiopacifier in bone cements with good tensile properties was reported. Using Servohydraulic Testing Machine in accordance with ISO 5833 standard using cylindrical specimens where the ratio of the length to the diameter is 2:1, the compression testing was performed. It was observed that the addition of TPB does not degrade the flexural or

Time hopping versus frequency hopping in ultrawideband systems

This paper analyzes frequency-hopping (FH) and time-hopping (TH) as multiple access format for ultrawideband communications. We apply the concept of "fourthegy", recently introduced by Subramanian and Hajek, to both TH and FH. We find that the design rules are different for FCC-compliant systems (where the power spectral density is limited) than for conventional systems (where the energy per bit i

SLM, a Framework for Session Layer Mobility Management

This paper describes a novel framework for managing connections to mobile hosts in the Internet. The framework, SLM, integrates the notions of quality of service management and mobility management and forms a base for overall session management. We compare SLM with the currently most widely adopted mobility management framework, Mobile IP, and show how some of Mobile IP's deficiencies are overcome

Preparation and Characterization of Macroporous Cryostructured Materials

Popular Abstract in Swedish Is är något som de flesta människor i Sverige kommer i kontakt med dagligen,om det är för att kyla en dryck eller ta sig en glass, är det något som de flesta är bekanta med. Om en vattenlösning eller en vattensuspension kyls under fryspunkten för vatten ( 0 °C) så börjar iskristaller att bildas. Speciellt med denna process är att iskristallerna som bildas består endast Macroporous hydrogels are regarded as interesting materials both within biotechnology and biomedicine due to their properties. These materials can be prepared from a wide range of synthetic or naturally occurring compounds using a number of different techniques for their production. For this thesis, cryostructuring was used to prepare macroporous hydrogels, often named cryogels. The work utilized