MySpace or OurSpace: a Cross-Cultural Empirical Analysis of MySpace Comments

The goal of the current study was to compare users from two distinct cultures to examine the extent to which they communicate differently through MySpace comments and to see how such differences might relate to their cultural background and biological sex. For this purpose, Hofstede\u27s theories of individualism/collectivism and masculinity/femininity and Ting-Toomey\u27s face negotiation theory were used as frameworks. Content analysis was performed on 150 Hungarian and 150 American randomly selected MySpace comments. One-way ANOVAs and crosstabulations showed some significant differences and similarities between Hungarian and American MySpace comments. Real-life cultural differences and sex-linked differences were found to be reflected in the comments. Thus, this study found mixed evidence for the existence of a global MySpace culture that includes both global linguistic features and reflects upon elements from users\u27 own traditional cultur

Development of new inhibitors for the enzymes dimethylarginine dimethylaminohydrolase and arginase

Diese Arbeit umfasst unterschiedliche Synthesen und Testungen neuer Inhibitoren der Enzyme Dimethylarginin Dimethylaminohydrolase (DDAH) und ArginaseThis work covers diverse syntheses and tests of new inhibitors of the enzymes dimethylarginine dimethylaminohydrolase (DDAH) and arginas

Experiments on the longitudinal ion momentum balance in a magnetized plasma

In the magnetized plasma of a hollow cathode arc the longitudinal and rotational drift velocities of ions have been measured, together with the electron and neutral densities and the temperatures of ions, electrons, and neutrals. The radial and longitudinal gradients of these quantities have been established. The ions drift against the electric field towards the anode with velocities between about 500 and 2500 m/s, driven by the plasma pressure gradient which is balanced by viscous deceleration and by friction against the surrounding neutral gas. The classical theory of the momentum balance with a turbulent contribution to the viscosity provides a good description of the longitudinal ion transport and explains direction and magnitude of the occurring drift velocity

The rotation of ions and neutrals in a cylindrical magnetized hollow cathode argon arc

In a magnetized hollow cathode arc rotational velocities of ions and neutrals and their temperatures were measured in axial and radial dependence. In comparison with theory experimental results give a detailed analysis of radial transport phenomen

Electroanatomical voltage mapping with contact force sensing for diagnosis of arrhythmogenic right ventricular cardiomyopathy

Background Three-dimensional electroanatomical mapping (EAM) can be helpful to diagnose arrhythmogenic right ventricular cardiomyopathy (ARVC). Yet, previous studies utilizing EAM have not systematically used contact-force sensing catheters (CFSC) to characterize the substrate in ARVC, which is the current gold standard to assure adequate tissue contact. Objective To investigate reference values for endocardial right ventricular (RV) EAM as well as substrate characterization in patients with ARVC by using CFSC. Methods Endocardial RV EAM during sinus rhythm was performed with CFSC in 12 patients with definite ARVC and 5 matched controls without structural heart disease. A subanalysis for the RV outflow tract (RVOT), septum, free-wall, subtricuspid region, and apex was performed. Endocardial bipolar and unipolar voltage amplitudes (BVA, UVA), signal characteristics and duration as well as the impact of catheter orientation on endocardial signals were also investigated. Results ARVC patients showed lower BVA vs. controls (p = 0.018), particularly in the subtricuspid region (1.4, IQR:0.5–3.1 vs. 3.8, IQR:2.5-5 mV, p = 0.037) and RV apex (2.5, IQR:1.5–4 vs. 4.3,IQR:2.9–6.1 mV, p = 0.019). BVA in all RV regions yielded a high sensitivity and specificity for ARVC diagnosis (AUC 59–78%, p < 0.05 for all), with the highest performance for the subtricuspid region (AUC 78%, 95% CI:0.75–0.81, p < 0.001, negative predictive value 100%). A positive correlation between BVA and an orthogonal catheter orientation (46°-90°:r = 0.106, p < 0.001), and a negative correlation between BVA and EGM duration (r = −0.370, p < 0.001) was found. Conclusions EAM using CFSC validates previous bipolar cut-off values for normal endocardial RV voltage amplitudes. RV voltages are generally lower in ARVC as compared to controls, with the subtricuspid area being commonly affected and having the highest discriminatory power to differentiate between ARVC and healthy controls. Therefore, EAM using CFSC constitutes a promising tool for diagnosis of ARVC