Solutions to the Problem Chow, Richard; Shi, Elaine; Jakobsson, Markus ...
The Death of the Internet,
2012, 2012-07-06
Book Chapter
This chapter contains sections titled: When and How to Authenticate Fastwords: Adapting Passwords to Constrained Keyboards Deriving PINs from Passwords Visual Preference Authentication The Deadly ...Sins of Security User Interfaces SpoofKiller��-��Let's Kiss Spoofing Goodbye! Device Identification and Intelligence How can we Determine if a Device is Infected or not?
49 patients with 51 left-sided accessory pathways underwent radiofrequency catheter ablation for symptomatic supraventricular tachycardia via the transeptal route using specialised long vascular ...sheaths with compound curves. The procedure was successful in 45 patients (92%). The mean fluroscopic time was 22.5±15.2 mins and the mean procedure time was 1.7±0.5 hours. Pericardial tamponade occurred in 2 patients (4%) and 2 patients (4%) required switching to the retrograde transaortic route for successful ablation of the pathways. During the period of follow-up of 16.8±6.9 months, clinical recurrence occurred in 2 patients (4%). In conclusion, , the transeptal route of radiofrequency catheter ablation is a useful alternative strategy to the transaortic approach with good long term results. The use of specialised sheaths may help in stabilisation of the catheter during the procedure which can generate more adequate lesions and consequently a lower recurrence rate.
We described a patient who presented with symptoms of heart failure and was found to have diastolic heart failure. Several investigations pointed to the diagnosis of constrictive pericarditis which ...was later confirmed by cardiac catheterisation. The etiology turns out to be primary cardiac lymphoma which is extremely rare in immunocompetent patients. This is followed by a brief review on the clinical presentation, diagnostic approach and management of primary cardiac lymphoma.
An examination of how part-time professional women in M-dominated occupations who are deemed objectively marginal in fact experience marginality subjectively. Extensive, semistructured personal ...interviews conductd in 1985/86 with a strategic sample of 30 Fs, all married with minor children, residing in the Washington, DC, area sought information about the Rs' work & family experiences. Most Rs perceived themselves to experience marginality as part-time professionals; fewer perceived themselves to be socially marginal as part-time homemakers, but vestiges of full-time homemaker role accomplishment ideals were still apparent in expectations many held for themselves. Most perceiving themselves to be marginal described only negative consequences of this experience. Initial evidence, based primarily on cross-tabulations of extent of perceived marginality with other major variables (family & career salience, life satisfaction levels, interrole strains, & coping behaviors) & secondarily on personality trait self-reports & measures, indicates that the marginality concept may have potential as a discriminating variable but that its conceptualization & measurement need refinement. Suggestions are offered toward this end.
We derive regional-scale (approximately 10⁴ km2) CO2 flux estimates for summer 2004 in the northeast United States and southern Quebec by assimilating extensive data into a receptor-oriented ...model-data fusion framework. Surface fluxes are specified using the Vegetation Photosynthesis and Respiration Model (VPRM), a simple, readily optimized biosphere model driven by satellite data, AmeriFlux eddy covariance measurements and meteorological fields. The surface flux model is coupled to a Lagrangian atmospheric adjoint model, the Stochastic Time-Inverted Lagrangian Transport Model (STILT) that links point observations to upwind sources with high spatiotemporal resolution. Analysis of CO2 concentration data from the NOAA-ESRL tall tower at Argyle, ME and from extensive aircraft surveys, shows that the STILT– VPRM framework successfully links model flux fields to regionally representative atmospheric CO2 data, providing a bridge between ‘bottom-up’ and ‘top-down’ methods for estimating regional CO2 budgets on timescales from hourly to monthly. The surface flux model, with initial calibration to eddy covariance data, produces an excellent a priori condition for inversion studies constrained by atmospheric concentration data. Exploratory optimization studies show that data from several sites in a region are needed to constrain model parameters for all major vegetation types, because the atmosphere commingles the influence of regional vegetation types, and even high-resolution meteorological analysis cannot disentangle the associated contributions. Airborne data are critical to help define uncertainty within the optimization framework, showing for example, that in summertime CO2 concentration at Argyle (107 m) is ∼0.6 ppm lower than the mean in the planetary boundary layer.
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