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Full-Text Articles in Physical Sciences and Mathematics
Single-Grain Osl Chronologies For Middle Palaeolithic Deposits At El Mnasra And El Harhoura 2, Morocco: Implications For Late Pleistocene Human-Environment Interactions Along The Atlantic Coast Of Northwest Africa, Zenobia Jacobs, Richard Roberts, Roland Nespoulet, M El Hajraoui, Andre Debenath
Single-Grain Osl Chronologies For Middle Palaeolithic Deposits At El Mnasra And El Harhoura 2, Morocco: Implications For Late Pleistocene Human-Environment Interactions Along The Atlantic Coast Of Northwest Africa, Zenobia Jacobs, Richard Roberts, Roland Nespoulet, M El Hajraoui, Andre Debenath
Richard G Roberts
Optically stimulated luminescence (OSL) measurements were made on individual, sand-sized grains of quartz from Middle Palaeolithic deposits at two cave sites (El Harhoura 2 and El Mnasra) on the Atlantic coast of Morocco. We were able to calculate OSL ages for 32 of the 33 samples collected from the Middle Palaeolithic deposits, including the earliest and latest Aterian levels at both sites. These ages reveal periods of occupation between about 110 and 95 ka (thousands of years ago), and at ~75 ka. A late Middle Palaeolithic occupation of El Harhoura 2 is also recorded at ~55 ka. Our single-grain OSL …
A Coloured Petri Net Based Approach For Flexible Agent Interactions, Quan Bai, Minjie Zhang, Fenghui Ren
A Coloured Petri Net Based Approach For Flexible Agent Interactions, Quan Bai, Minjie Zhang, Fenghui Ren
Dr Fenghui Ren
As one of the most important artificial intelligence techniques, multi-agent systems are widely applied in many fields. In a multi-agent system, agent interactions are established through exchanging messages by following some interaction protocols. However, as the application domains of MASs are getting more and more complex, some limitations of current multi-agent interaction mechanisms are rising up. To cover some limitations of current agent interaction mechanisms, in this paper, we propose a Coloured Petri Net based approach to enable flexible agent interactions in open environments. This approach adopts Coloured Petri Net techniques to model agent interaction protocols, and separates interaction protocols …
Protective Interactions Of Dairy Peptides With Fibril Structures And Relevance To Alzheimer's Disease, Louise Bennett, Williams Roderick, Heath Ecroyd, Yanqin Liu, Sunanda Sudharmarajan, John Carver
Protective Interactions Of Dairy Peptides With Fibril Structures And Relevance To Alzheimer's Disease, Louise Bennett, Williams Roderick, Heath Ecroyd, Yanqin Liu, Sunanda Sudharmarajan, John Carver
Heath Ecroyd
Selected dairy caseins have been shown to have capacity for chaperone-like regulation of folding pathways of other caseins, specifically in preventing development of fibrillar aggregates of beta sheet structure. An assay based on fibril formation by reduced and carboxymethylated-kappa casein (RCM-kCn) was thus used to screen for anti-fibril activity among a selection of dairy protein hydrolysates, in order to discover peptides with possible anti-fibril, chaperone activity. From the selection of eight dairy hydrolysates based on different dairy protein fractions, two of the hydrolysates of whey protein exhibited superior anti-fibril bioactivity against RCM-kCn and amyloid beta (Aβ), the peptide associated with …