Engineering aircraft systems is a complex task. Therefore models and computer simulations are needed to test functions and behaviors of non existing systems, reduce testing time and cost, reduce the risk involved and to detect problems early which reduce the amount of implementation errors. At the section Vehicle Simulation and Thermal Analysis at Saab Aeronautics in Linköping every basic aircr...

New automated laser radar measurement systems at the Saab Inc. West Lafayette, USA, facility will make airframe assembly of aft body for new eT7-A aircraft a quicker, more cost-efficient process. Digital twin concepts realized through simulation and off-line programming show advantageous results when studying future state scenarios or investigating how current large-volume dimensional metrology...

Turbo charged SI engines are a major possibility in the current trend of down-sized engines with preserved drivability performance. Considering control and supervision it is favorable to have a mean value model to be used e.g. in observer design. Such models of turbo engines are similar to those of naturally aspirated engines, but there are some special characteristics, e.g. the interconnected ...

Previous work showed that primary root elongation in maize (Zea mays L.) seedlings at low water potentials (psi(w)) requires the accumulation of abscisic acid (ABA) (R.E. Sharp, Y. Wu, G.S. Voetberg, I.N. Saab, M.E. LeNoble [1994] J Exp Bot 45: 1743-1751). The objective of the present study was to determine whether the inhibition of elongation in ABA-deficient roots is attributable to ethylene....

Establishing interoperability is an essential aspect of the often-pursued shift towards Model-Based Systems Engineering (MBSE) in, for example, aircraft development. If models are to be primary information carriers during development, applied methods enable interaction between engineering domains need modular, reusable, and scalable. Given long life cycles often large heterogeneous development ...

It is well known that state encoding can in uence the logic initializability of an FSM implementation. If the sole objective of an \optimal" state assignment is to minimize the amount of logic, one may end up with implementations that are logically uninitializable. That is, a 3-valued (0,1,X) logic simulator may not be able to initialize the circuit even when its FSM has a synchronizing sequenc...

Support for system speciication in terms of modelling and simulation environments has become a common practice in safety-critical applications. Also, a current trend is the automatic code-generation, and integration with formal methods tools in terms of translators from a high level design { often using common intermediate languages. What is missing from current formal methods tools is a well-f...

Plants experience oxidative stress upon exposure to heavy metals that leads to cellular damage. In addition, plants accumulate metal ions that disturb cellular ionic homeostasis. To minimize the detrimental effects of heavy metal exposure and their accumulation, plants have evolved detoxification mechanisms. Such mechanisms are mainly based on chelation and subcellular compartmentalization. Che...