Tuple reduction is the basic mechanism used in SPKI to make authorisation decisions. A basic problem with the SPKI authorisation syntax is that straightforward implementations of tuple reduction are quadratic in both time and space. In the paper we introduce a restricted version of the SPKI authorisation syntax, which appears to conform well with practice, and for which authorisation decisions ...

Table of contents 1. Presentations Maggie Swan : Creative Women on the WWW: Visual Analysis of Representation, Symbolism and Ideology Elijah Wright -Credibility in Weblog War Coverage Anis Pervez -Film, Cognition and Information Yueyu Fu -Protein Association Discovery in Biomedical Literature Ketan Mane -Content Coverage of PNAS in 1982-2001 Aaron Loehrlein -Systems for the Representation of Bi...

AIMS To explore the utility of first-person viewpoint cameras at home, for recording mother and infant behaviour, and for reducing problems associated with participant reactivity, which represent a fundamental bias in observational research. METHODS We compared footage recording the same play interactions from a traditional third-person point of view (3rd PC) and using cameras worn on headban...

Purported genetic associations found in population studies require validation for confirmation. We previously reported rubella vaccine-induced immune responses and HLA associations in 346 adolescents, age 12-18 years (1st cohort), following two doses of a rubella-containing vaccine. We sought to replicate the associations discovered in that work by verifying these associations in a new cohort o...

Background: There is a growing interest in the role of the choroid in various chorioretinal diseases. The aim of this study is to investigate the changes in different area of choroidal thickness (CT) following scleral buckling surgery using Enhanced-depth imaging optical coherence tomography (EDI-OCT). Methods: This prospective clinical study compared 24 patients with Retinal detachment (RD) an...

STIMULI. The 1st-order stimuli are moving sine gratings. The 2nd-order stimuli are fields of static visual texture, whose contrasts are modulated by moving sine gratings. Neither the spatial slant (orientation) nor the direction of motion of these 2nd-order (microbalanced) stimuli can be detected by a Fourier analysis; they are invisible to Reichardt and motion-energy detectors. METHOD. For the...

OBJECTIVE To evaluate occurrence of synchronous and metachronous malignant tumours, to find tumour types, age group, and relationship to treatment received. METHODS Previously diagnosed 1st primary tumour cases experiencing a synchronous or metachronous tumour, seen at AOI from February 2003 to August 2009 (78 months) were included. The cases were analyzed for morphology/histology of 1st prim...

Um planejamento fatorial completo foi empregado na investigação dos efeitos das variáveis de polpação kraft de eucalipto nas retenções de carbohidratos e lignina. As influências da retenção desses componentes nas propriedades físico-químicas e mecânicas da polpa foram avaliadas usando o método de Análise de Componentes Principais. O álcali ativo (AA) foi a variável que mais afetou a degradação ...

The Clostridium genus is a large, diverse group consisting of Gram-positive, spore-forming, obligate anaerobic firmicutes. Among this group are historically notorious pathogens as well as several industrially relevant species with the ability to produce chemical commodities, particularly biofuels, from renewable biomass. Additionally, other species are studied for their potential use as therape...

an experiment conducted to study the effects of transplanting dates on rapeseed (brassica napus l.) yield and its components as second crop after rice in agriculture faculty of ghlilan university. this research was conducted in a randomized complete block design (rcbd) with 3 replications on the pf (sarigol) cultivar. treatments consisted various dates of transplanting in cluding 1st november, ...