ODC 232.315 015.28 The ultrastructure of three parts (endos.vernz, rootlets and cotyledorrs) of aged seeds o f Pinus sylvestris L. has been studied. In dry seeds no clear differences resulting from ageing are seen as compared with resting living cells, but during imbibition clear differences are evident. Inhibition of development of the D N A containing structures, mitochondria and plastids, wa...

The biological control agent Tetrastichus planipennisi Yang (Hymenoptera: Eulophidae) is a gregarious larval endoparasitoid of the emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae), an invasive cambium-feeding species responsible for recent, widespread mortality of ash (Fraxinus spp.) in North America. T. planipennisi is known to prefer late-instar emerald ash borer, bu...

The automotive industry has successfully collaborated to release the ISO 26262 standard for developing safe software for cars. The standard describes in detail how to conduct hazard analysis and risk assessments to determine the necessary safety measures for each feature. However, the standard does not concern threat analysis for malicious attackers or how to select appropriate security counter...

In any hosteparasitoid interaction, the detection of the host in its microhabitat is a crucial step in the interaction that has a major influence on the parasitoid’s fitness. We used bioassays to investigate whether the parasitoid Sympiesis sericeicornis (Hymenoptera: Eulophidae) uses the vibrations of its host Phyllonorycter sp. gr. blancardella (Lepidoptera: Gracillariidae) to detect it in th...

Interpretation Abstract interpretation is a theory of effective abstraction and/or approximation of discrete mathematical structures as found in the semantics of programming languages, modelling program executions, hence program properties, at various levels of abstraction [3,7,8,10,12].interpretation is a theory of effective abstraction and/or approximation of discrete mathematical structures ...

Scientific endeavour has one goal: to unravel mechanisms underlying the real world with utmost objectivity. Rigorous logic and experimentation are as essential for this purpose as is the consideration of extant knowledge. Bias is the demon of science at any level, and our incessant effort is to escape its temptation. It is always worth to scrutinize our success (Gluud 2006; Lortie et al. 2007)....

A new crane design, labeled ”SpiderCrane”, is proposed to handle fast load displacements. Its main particularity is the absence of heavy mobile components. The system beeing underactuated, its control is challenging. Hence, as a step towards easier and more efficient control, this paper proposes a dynamic model and investigates the two control-relevant properties of flatness and observability. ...

One of the most important aspects of engineering asset management (EAM) is maximising an asset’s operational time. Sun et al. (2006) and Yao et al. (2005) claim that operating and maintaining today’s physical assets is more complicated due to their having more functions than ever before. Moreover, current working circumstances are more complex and therefore need to be managed by multiple and in...

The cost and difficulty of maintaining large scale heterogeneous systems has caused a paradigm shift towards self-managing systems. Large-scale systems typically require intensive data management services and hence many database management systems now incorporate features such as self-configuration, selfoptimization, self-protection, and self-healing. This paper proposes criteria for evaluating...