It is shown that the infall of collisionless dark matter onto isolated galaxies produces a series of caustic rings in the halo dark matter distribution. The properties of these caustics are investigated. It is found in particular that the density profile of the caustic behaves as the inverse distance to the ring. Bumps in the rotation curve of NGC 3198 are interpreted as due to caustic rings of...

The development of a technic for noniurgical steri l ization having acceptable clinical effectiveness and a minimum of undesirable side effects is one of the principal &jectiVeS of physicians who are concerned shout the demographic problems of the world. As noted by Corfman,l who recently reviewed the relevant historic aspects, transvaginal sterilization technics have been studied for more than...

Caustic substances cause tissue destruction through liquefaction or coagulation reactions and the intensity of destruction depends on the type, concentration, time of contact and amount of the substance ingested. We report an unusual presentation and complication of caustic ingestion in a patient, who accidentally ingested sodium hydroxide. Our patient presented respiratory failure soon after a...

PURPOSE To evaluate the topical effects of mitomycin C (MMC) in rats, with or without esophageal dilation, in different moments after esophageal caustic injury with NaOH10%. METHODS Forty eight Wistar rats were divided into six groups: "GS" infusion of 0.9% saline solution in the esophagus; "CG" infusion of 0.9% saline solution in the esophagus, with temporary ligation of the organ; "NTG" ind...

We revisit the possibility of detecting an extrasolar planet around a background star as it crosses the fold caustic of a foreground binary lens. During such an event, the planet’s flux can be magnified by a factor of ∼ 100 or more. We find that the detectability of the planet depends strongly on the orientation of its orbit relative to the caustic. If the source star is inside the inter–causti...

We investigate the possibility of lens mass determination for a caustic crossing microlensing event based on a space telescope observation. We demonstrate that the parallax due to the orbital motion of a space telescope causes a periodic fluctuation of the light curve, from which the lens distance can be derived. Since the proper motion of the lens relative to the source is also measurable for ...

A caustic vector vortex optical field is experimentally generated and demonstrated by a caustic-based approach. The desired caustic with arbitrary acceleration trajectories, as well as the structured states of polarization (SoP) and vortex orders located in different positions in the field cross-section, is generated by imposing the corresponding spatial phase function in a vector vortex optica...

We present a real-time GPU caustics rendering technique for dynamic scenes under environment illumination taking into account light occlusion. The dynamic scenes consist of caustic objects (reflective and/or refractive objects which produce caustics) and receiver objects (non-reflective and nonrefractive), that can be translated and rotated. As the light source, we consider environment illumina...