Let G = (V,E) be a graph and u, v ∈ V be two distinct vertices. We give a necessary and sufficient condition for the existence of an infinitesimally rigid two-dimensional bar-and-joint framework (G, p), in which the positions of u and v coincide. We also determine the rank function of the corresponding modified generic rigidity matroid on ground-set E. The results lead to efficient algorithms f...

[1] On 15 October 1999, charged particle and plasma wave detectors on the Polar satellite observed an enhancement in precipitating energetic electrons coincident with an ELF/VLF electromagnetic emission. Assuming that the electromagnetic wave was field aligned and scattered trapped electrons by first-order cyclotron resonance near the equatorial plane, the resulting pitch angle distribution of ...

Pure red cell agenesis in adults was first described by Kaznelson (1922). Since then the condition has been seen with and without coincident thymic tumour, and by March, 1958, 14 cases of the tumour-anaemia syndrome had been reported (Davidsohn, 1941; Humphreys and Southworth, 1945; Chediak, Fuste, and Rosales, 1953; Ross, Finch, Street, and Strieder, 1954; Chalmers and Boheimer, 1954; Bakker, ...

This paper presents a robust, accurate sound source localization method using a compact, near-coincident microphone array. We derive features by combining the microphone signals and determine the direction of a single sound source by similarity matching. Therefore, the observed features are compared with a set of previously measured reference features, which are stored in a look-up table. By pr...

In this case, a 41-year-old morbidly obese African American male with arthritis, hidradentitis suprativa, and a history of cystic acne with keloid formation was treated with adalimumab. The patient had developed hidradentitis 15 years before presentation and arthritis 8 years before presentation. He had a history of nodules and ulcers on his legs clinically diagnosed as pyoderma gangrenosum. He...

Current phylogenetic sampling reveals that dioecy and an XY sex chromosome pair evolved once, or possibly twice, in the genus Asparagus Although there appear to be some lineage-specific polyploidization events, the base chromosome number of 2n = 2× = 20 is relatively conserved across the Asparagus genus. Regardless, dioecious species tend to have larger genomes than hermaphroditic species. Here...