The Dynamics of Supercooled Silica: Acoustic modes and Boson peak

Using molecular dynamics computer simulations we investigate the dynamics of supercooled silica in the frequency range 0.5-20~THz and the wave-vector range 0.13-1.1\AA^{-1}. We find that for small wave-vectors the dispersion relations are in very good agreement with the ones found in experiments and that the frequency at which the boson-peak is observed shows a maximum at around 0.39\AA^{-1}.Comment: 4 pages of RevTex, 3 figure

Overanticoagulation on coumarin anticoagulants

Most of the extensive research on oral anticoagulant therapy has focussed on its pharmacological- and biochemical action, prothrombin time calibration, optimal therapeutic intensity and hemorrhagic complications. However, whlle the risks of overanticoagulation are clear, its treatment and determinants have received little attention. Therefore, the aim of this thesis was to study aspects of overanticoagulation on coumarin anticoagulants among outpatients of an anticoagulation clinic. Overanticoagulation was defined as an INR:>6.0, since at this INR-value the risk of hemorrhage sharply increases (28, 41). Chapter 2 relates to the treatment of overanticoagulation and describes the course of the INR in response to oral vitamin K1 in overanticoagulated patients. Chapter 3 concerns the incidence of and risk factors for overanticoagulation and includes five studies. Chapter 3.1 focusses on characteristics of antic

Women are better at selecting gifts than men

There is a widespread belief that women are better at selecting gifts than men; however, this claim has not been assessed on the basis of objective criteria. The current studies do exactly that and show that women do indeed make better gift selections for others, regardless of the gender of the receiver and the type of relationship between the giver and receiver. We investigate the mediating role of different aspects of interpersonal sensitivity and reveal that differences in interpersonal interest (measured with an autism questionnaire), but not differences in interpersonal reactivity, explain gender differences in gift selection quality. The current studies thus present the first objective evidence for the claim that women are better in selecting gifts for others and also give an indication of why this is the case