Abstract-The performance and power efficiency of multi-core processors are attractive features for safety-critical applications, as in avionics. But increased integration and average-case performance optimizations pose challenges when deploying them for such domains. In this paper we propose a novel approach to compute a interference-sensitive Worst-Case Execution Time (isWCET) considering variable accesses delays due to the concurrent use of shared resources in multi-core processors. Thereby we tackle the problem of temporal partitioning as it is required by safety-critical applications. In particular, we introduce additional phases to state-of-the-art timing analysis techniques to analyse an applications resource usage and compute an interference delay. We further complement the offline analysis with a runtime monitoring concept to enforce resource usage guarantees. The concepts are evaluated on Freescale's P4080 multi-core processor in combination with SYSGO's commercial real-time operating system PikeOS and AbsInt's timing analysis framework aiT. We abstract real applications' behavior using a representative task set of the EEMBC Autobench benchmark suite. Our results show a reduction of up to 75% of the multi-core Worst-Case Execution Time (WCET), while implementing full transparency to the temporal and functional behavior of applications, enabling the seamless integration of legacy applications.

Fish have been shown to act as sentinel organisms in genetic toxicology studies and the micronucleus (MN) test using fish erythrocytes has been successfully used to evaluate the genotoxic impact of environmental pollutants on aquatic environments. This study used the MN test of peripheral blood of specimens of a native fish species (Hyphessobrycon luetkenii) to evaluate the genotoxicity of the water of two unconnected reservoirs of the Canela National Forest in southern Brazil. Fish were caught in the reservoirs and MN frequencies in blood smears were determined. Baseline MN frequency of H. luetkenii was determined in the uncontaminated reservoir (reference site) and compared with the results obtained at two different sampling periods (winter and spring) in the reservoir which receives discharges of industrial and municipal wastes. In the spring season, MN frequency in the contaminated reservoir was about five times higher than in the reference site (0.51% and 0.10%, respectively). The results of this study indicate that some fish populations are at risk of exposure to genotoxic pollutants in the Canela National Forest.

Dendropsophus nahdereri is included in the Dendropsophus marmoratus group. Its distribution is known from the Brazilian states of Paraná and Santa Catarina. Here we report new records of this species and briefly describe the habitat of calling males. We found new localities of occurrence of D. nahdereri in Brazilian states of Santa Catarina and Rio Grande do Sul. We collected calling males in temporary lentic water bodies surrounded by arboreal vegetation, inside and on the border of native forest, and inside Pinus plantations near native forest.

Although predatory events are uncommon to be recorded in nature, these data are important tools for understanding prey-predator interaction of the involved species. Snakes of genus Thamnodynastes are known for having an anuran diet, including some species of hylid frogs in their diet. Despite this, this pattern does not include T. chaquensis since there are no records on predation or trophic interaction with hylid frogs.Here, we report the first predatory interaction between T. chaquensis and two hylid frogs in Brazilian Cerrado. The first predation event with treefrog Boana caiapo occurred with success but, the second with B. albopunctatadid not. Connecting trophic links within an ecosystem requires in-depth knowledge of its species and their intraspecific interactions. In this context, records of the predation and predation attempts such as these may help to connect unknown trophic links, which helps to understand aspects of the natural history of the species involved.

Abstract. We present new records for Hydrodynastes melanogigas Franco, Fernandes & Bentim, 2007, from eastern Mato Grosso state, Central Brazil. The four specimens found in the municipalities of Novo Santo Antônio and Ribeirão Cascalheira represent the first records in the state of Mato Grosso, and expand the species' known distribution some 380 km southwest.