Abstract For a two-dimensional Artin group $A$ whose associated Coxeter is hyperbolic, we prove that the action of on hyperbolic space obtained by coning off certain subcomplexes its modified Deligne complex acylindrical. Moreover, if for each $s\in S$ there $t\in with $m_{st}< \infty $, then this universal. As consequence, $|S|\geq 3$, irreducible, it acylindrically hyperbolic. We also ...

Intersection homology is obtained from ordinary homology by imposing conditions on how the embedded simplices meet the strata of a space X . In this way, for the middle perversity, properties such as strong Lefschetz are preserved. This paper defines local-global intersection homology groups, that record global information about the singularities of X . They differ from intersection homology in...

110/60 mmHg and pulse rate 130/min and regular. Results of laboratory investigations were normal. S. flexneri type 2a was later isolated from the stool. Treatment was started with ampicillin 250 mg every 8 hours orally. Six hours after admission she had a grand mal seizure and shortly thereafter became apnoeic and unresponsive to noxious stimulation. The pupils were widely dilated (6 mm) and fi...

Extracting instantaneous frequency (IF) of Micro-Doppler (M-D) is the key to estimating micro-motion parameters. In this paper, firstly, the micro-motion model of coning was set up. Meanwhile, the theoretical analysis and derivation of micro-Doppler were performed. Then we introduced occlusion effect and Time Frequency transform to better accord with the complexity and reality of feature extrac...

The dynamic stability and equilibrium conditions of a parachute are studied using a six degree of freedom dynamic model that includes apparent inertia effects. Existing parachute dynamic models are discussed and the selection of a relevant model is shown. The chosen dynamic model that incorporates apparent inertia is summarized and used for analysis. The moments on the parachute system caused b...

This paper provides an overview of the primary strapdown inertial system computational elements and their interrelationship. Using an aircraft type strapdown inertial navigation system as a representative example, the paper provides differential equations for attitude, velocity, position determination, associated integral solution functions, and representative algorithms for system computer imp...