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The paper investigates a model for authentication in which not only an outsider, but also the transmitter or the receiver, may cheat. Lower bounds on the probability of success for different types of deception as well as on the parameters of secure authentication codes are derived. The latter bounds are shown to be tight by demonstrating codes in projective space that meet the bounds with equality

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Popular Abstract in Swedish Sedan årtionden tillbaks finns en stor mängd klorerade organiska miljögifter spridda i vår miljö (t ex DDT, PCBer och dioxiner). Djur får i sig miljögifterna främst med födan och eftersom dessa ämnen som regel är svårnedbrytbara och inte kan omsättas i kroppen i någon större omfattning leder detta till att de istället lagras upp i djuren, framför allt i fettvävnaden. EtChlorinated fatty acids (ClFAs) are the major contributors of extractable, organically bound chlorine in fish lipids. A known anthropogenic source of ClFAs is chlorine bleached pulp production. Additional anthropogenic sources may exist, e.g., chlorine-containing discharge from industrial and house-hold waste and they may also occur naturally. ClFAs have a wide geographic distribution. They have,

In this paper, we consider the problem of robust optimization for a system with uncertainty of rank one. The main result is the canonical parameterization of all destabilizing uncertainties in the dual problem. The corresponding result in the rational case has been previously stated in terms of unstable zero-pole cancellations.In this paper the result is extended to the class of non-rational syste

En översiktlig genomgång av vilka texttyper som förekommo på de nordiska språken under 1500-, 1600- och 1700-talet: vilka som funnos kvar respektive försvunno av de medeltida och vilka som tillkommo såsom nya - uppdelat på olika samhällssfärer: kyrka, myndighetsutövning, undervisning och upplysning, privat offentlighet, privatliv.

Presented to 42 schizophrenic patients and 19 normals, by means of a percept-genetic technique, two motifs of mother and infant in close interaction (feeding and nursing) . The motifs were tagged, by subliminal presentation, with aggressive resp. "healing" sentences, in a balanced design. No effects of this tagging were discernible. A cluster-analysis (Ward s method) of the material yielded 4 fair

The aim of this study was to determine if arbuscular mycorrhizal (AM) colonisation influences rhizosphere bacteria differently depending on plant species. Thus, the effect of AM colonisation (Glomus intraradices) on rhizosphere bacteria of subterranean clover, cucumber, leek and maize was studied. The bacterial activity was measured as thymidine or leucine incorporation and bacterial numbers as co

Cytokines have been shown to have important roles in lymphopoiesis. However, many questions remain unresolved. Among other, while the action of interleukin (IL)-7 in alpha beta T cell development in mouse seems to be largely mediated through permissive survival signaling, the possible permissive role of IL-7 in early B cell development is disputed. Furthermore, FMS-like tyrosine kinase-3 ligand (F

1 We investigated the antagonistic effect of 1-piperidinecarboxamide, N-[2-[[5amino-1-[[4-(4-pyridinyl)-1-piperazinyl]carbonyl]pentyl]amino]-1 -[(3,5-dibromo-4-hydroxyphenyl)methyl]-2-oxoethyl]4-(1,4- dihydro-2-oxo-3(2H)-quinazolinyl) (BIBN4096BS) on the calcitonin gene-related peptide (CGRP)-induced responses by using isometric myograph and FURA-2 technique in human subcutaneous arteries removed

Metabolic stress is a phenomenon often discussed in conjunction with recombinant protein production in Escherichia coli. This investigation shows how heterologous protein production, and the presence of host cell proteases is related to: i) IPTG induction, ii) cell mass concentration at the time of induction and iii) the presence of metabolites (glutamic acid or those from TSB) during the post ind