The high ambient ozone concentrations cause impairing effects on vegetation leading to plant injuries. potential uptake through open stomata can be quantified using stomatal conductance measurements under the local environmental conditions. This study compares obtained with a modified Jarvis formula adopted from Vegetation Manual of United Nations Economic Commission for Europe, and experimenta...

Researchers now regularly estimate spatial models in applied political science, both to enhance the validity of their “direct” (i.e., non-spatial) covariate effect estimates and to test explicitly spatial theories. While this is a welcome advance over past practices, we worry that much of this first generation of applied spatial research overlooks certain aspects of spatial models. In particula...

Collaborative corporate requirements engineering and system specification demands modelling approaches that all stakeholders can understand and apply. Using traditional methods, an IT organization often experiences frustrating communication and competency issues. Current processes lack adequate tool support for networked and complex projects. We present a tool-chain for model-based requirements...

We propose a quartic function to represent a family of continuous quality loss functions. Depending on the choice of its parameters the shape of this function within the specification limits can be either symmetric or asymmetric, and it can be either similar to the ubiquitous quadratic loss function or somewhat closer to the conventional step function. We examine this family of loss functions i...

Model interpreters play an essential role in modelintegrated systems: they transform domain-specific models into executable models. The state-ot-the-art of model interpreter writing needs to be advanced to enhance the reusability and maintainability of this software. This paper presents an approach which makes this possible through the use of structured specifications. These specifications let ...

Medical researchers may be interested in disease processes‎  ‎that are not‎ ‎directly observable‎. ‎Imperfect diagnostic‎ ‎tests may be used repeatedly to monitor the‎ ‎condition of a patient in the absence of a gold standard.‎ ‎We consider parameter identifiability and estimability‎ ‎in a Markov model for alternating binary longitudinal ‎responses that may be misclassified.‎ ‎Exactly ...