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Accurate characterization of the astrometric errors in the forthcoming Gaia catalogue is essential for making optimal use of the data. Using small-scale numerical simulations of the astrometric solution, we investigate the expected spatial correlation between the astrometric errors of stars as function of their angular separation. Extrapolating to the full-scale solution for the final Gala catalog
In two experiments, repeated runs of a continuous recognition task were employed to assess healthy participants' ability to handle interference from irrelevant emotional and neutral memories. Presumably, such interference can be due to salience from either emotional or mnemonic processing. In both experiments, participants made more false alarms to emotional faces that were familiar from preceding
Molecular simulations of strongly coupled dipolar systems of varying size have been carried out, using particles confined inside a dielectric cavity and an image charge approach to treat the dielectric response from the surroundings. A simple method using penalty functions was employed to create an isotropic and homogeneous distribution of particles inside the cavity. The dielectric response of th
Hemoglobin (Hb) is one of the most studied proteins. However, oxidative toxicity associated with free Hb in circulation and its contribution to inflammation and complications of transfusion have only recently become active areas of research. New insights into the protective mechanisms of haptoglobin (Hp), a plasma protein, and a timely resolution of the crystal structure of the Hb-Hp complex made
The article outlines the origin and later transformation of Medieval Archaeology to Historical Archaeology, both as an antiquarian practice and as an academic subject, focusing on the development in Sweden since the 18th C. Where the concept of the Middle Ages defined the former subject, both its opportunities and its limitations, now Modernity has turned up as a new challenging concept. Archaeolo
We perform a slight generalization of the Bjerksund and Stensland (2011) spread option valuation formula to cover three-asset spread options. We investigate the pricing performance of the model against the corresponding version of the Kirk formula and the true price calculated with Monte Carlo methods. The numerical setting of the evaluation is designed to mimic a real market situation in the Germ
Delays and cost overruns are frequent problems in the construction industries of both developed and developing countries. Studies aimed at identifying the causes are often undertaken with just a broad appreciation of the construction process and frequently do not deal with multicultural issues when considering the reasons for overruns. The paper critically reviews existing attempts to uncover the
Many scholars have claimed that the stone battle axes of the Battle Axe Culture were status objects with a social rather than a pratical function. One way of investigating this is to study the context in which the battle axes were manufactured, and by whom. If any object is to serve as a mark of status, it must be possible for someone who wishes to assert his/her superiority over other community m
Force feedback (FF) is a technology which is very interesting in the context of human machine interfaces. This as it is usable as a haptic interface, which makes it possible to model and simulate objects and textures. One problem with haptic FF devices today is that most of them are of professional or research standard, which makes them expensive. The technology of FF have also been introduced in
The FIR function of the proposed filter is realized by integrating weighted signal currents in a given time window on a capacitor The input signal voltage is weighted into multiple voltages according to the FIR requirement through a resistor ladder. A switching network sequentially connects the weighted voltages to a linear transconductor which converts the voltage to current and charges the capac
Wave cycle distributions are notoriously difficult to calculate. Available analytic approximations, like those suggested by Longuet-Higgins (1983) and Cavanie, Arhan and Ezraty (1976) make use only of a few spectral moments, and are unreliable for moderate waves. To find distributions under general spectrum shape and parameters one has to use efficient numerical algorithms based on high-dimensiona
The History of African Development aims to draw experts in the field of African History and African Development Studies together around an open access textbook for African teachers and undergraduate students. The textbook is reaching out to all African and non-African scholars willing to contribute a concise chapter (ca. 5000 words). The chapters describe and explain various aspects of historical
