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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
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
A model describing the oxygen dynamics in an E. coli fed-batch cultivation is presented. In a linearised version the parameters are estimated and validated with good results. The model is used to discuss the guidelines for feed controller tuning derived in Åkesson 2001.
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
Popular Abstract in Swedish Det blir allt vanligare att använda sig av medicin som liknar kroppens eget immunförsvar. Eftersom det ställs höga krav på att medicinen måste vara ren när den används så behöver man avskilja farliga substanser. I den här studien tittar vi på sådana reningsprocesser. Antikroppar är en del av det naturliga immunförsvaret hos oss alla. De hjälper till att upptäcka och neuAntibodies are part of the immune system where their purpose is to recognize and neutralize foreign species such as viruses and bacteria, thus preventing and curing infections. The trend of using antibodies in the treatment of, for example, cancer is increasing. These antibodies are produced in bioreactors, but the production stream from the bioreactors also includes impurities such as viruses and
Against the background of the ongoing shift in the perception of the legality and legitimacy of extraterritorial lethal force in counterterrorism, this thesis analyses the emergence of so-called “targeted killing” in the history of Israel and the US, as well as in international law. It finds that the relationship between targeted killing and law, particularly international law, is not a straightfo
Societal and technological transformation in the face of climate change will be won or lost in our cities and urban communities. This is not just because of the global urban demographic shift with more than 50 percent of the population now living in urban conditions, or because cities contribute around 70 to 80 percent of greenhouse gas emissions, but it is as much to do with the growing economic
Objectives: To analyse and present the outcome of longitudinal change and possible subgroups with respect to Activities of daily living (ADL) function measured by different scales (PSMS, FAST and IADL) in patients treated with donepezil for three years (n=435). Methods: The Swedish Alzheimer Treatment Study (SATS) is an open, 3-year, multicentre study in a routine clinical setting. The patients we
This paper discusses class-related issues in the popular television programme Th L-Word.
