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The impact of interference from Bluetooth networks on the throughput of IEEE 802.11 FHSS networks is investigated. This is done by deriving an analytical approximation of the throughput of slow frequency-hopping systems. The derivation in itself provides valuable insights into the mechanisms of interference between systems employing the frequency-hopping technique. In deriving the approximation, i
Popular Abstract in Swedish By building a strong brand that is favourably perceived by target customers, a firm can establish a competitive advantage that enables greater revenues and profitability. This is at least what the branding literature always has assumed, and something few marketing and brand managers seem to disagree with. When asked how exactly a brand can be charged with such great valBy building a strong brand that is favourably perceived by target customers, a firm can establish a competitive advantage that enables greater revenues and profitability. This is at least what the branding literature always has assumed, and something few marketing and brand managers seem to disagree with. When asked how exactly a brand can be charged with such great value, however, neither academi
In this paper we consider the least time--frequency product necessary to transmit a small finite symbol packet such that the symbols can be independently detected. The system model assumed is offset QAM-OFDM, based on a finite duration pulse shape. The outcome is that the optimal pulse shape is of very short duration and that the optimal symbol allocation strategy is often to use as many subcarrie
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The paper presents how Grafchart, a toolbox based on Grafcet, object-oriented programming ideas and high-level Petri nets, can be used to implement a batch control recipe execution and recipe representation system,. A brief overview of Grafchart is given and it is shown how its concepts fit the models defined in the recent ISA batch control standard S88.01. A simulated batch process cell scenario
Self-tuning control of the dissolved oxygen concentration has been tested in full scale at the Käppala Sewage Works at Lidingö, Sweden. The controller has been shown to be robust during varying operating conditions. It also gives the potential for the estimation of interesting variables, such as the oxygen uptake rate. A number of water quality variables have been examined. Interesting couplings b
A short Encyclopedia article on Richar Walther Darré. minister of agriculture in the Third Reich, close to Himmler
Funerary poems on animals form a subgenre of the standard epitaph written to commemorate a deceased person. The poet who created the conditions necessary for the establishment of this kind of poetry in Sweden was the queen dowager Hedvig Eleonora’s court poet Erik Lindschöld (1634–1690); his poems mourning the death of the queen’s bitches were presumably composed in the 1670s. These poems constitu
Correct estimation of symbol timing, Carrier Frequency Offset (CFO), and Signal-to-Noise Ratio (SNR) is crucial in Orthogonal Frequency Division Multiplexing (OFDM) communication. Typically, high estimation accuracy is desired, but often comes with increased complexity. Which has a direct repercussion in energy consumption. In this article, an architecture based on Sign-Bit estimation with low com
This articles discusses the professionalization of human rights NGOs in the Balkans and the consequences for the relation between civil society as social movements, versus Civil Society as a budget category. This latter tendency leads to the rise of the projectization of development, wehereby NGOs simply become project organizations. The result is restrictions on the development of NGOs as the voi
