A 6-year-old child was referred for a suspected viral exanthem associated with URTI. On examination the trunk showed a maculopapular rash while the sole showed multiple black “spots” which were present for 7 days. A diagnosis of Talon noir was confirmed by paring the lesion with a No 15 blade which removed the superficial layer of the stratum corneum, and revealed puncta of black pigment of ext...

Studying the geographic variation of phenotypic traits can provide key information about the potential adaptive function of alternative phenotypes. Gloger’s rule posits that animals should be darkvs. light-colored in warm and humid vs. cold and dry habitats, respectively. The rule is based on the assumption that melanin pigments and/or dark coloration confer selective advantages in warm and hum...

This paper discusses the overall design and implementation of a video sensor for the detection of risky behaviors of car drivers near previously identified and georeferenced black spots. The main goal is to provide the driver with a visual audio alert that informs of the proximity of an area of high incidence of highway accidents only if their driving behavior could result in a risky situation....

A simplified mass screening method for methylmercury exposure was developed using methylmercury-volatilizing bacteria from Minamata Bay. Some bacteria can transform methylmercury into mercury vapor. Most mercury in the hair is methylmercury, which is readily extracted with HCl solution. Black spots are formed on X-ray film due to the reduction of Ag(+) emulsion with mercury vapor produced by me...

The flaring events observed in the Sagittarius A* supermassive black hole system can be attributed to non-homogeneous nature of near-horizon accretion flow. Bright regions this flow may associated with density or temperature anisotropies, so-called "bright spot" "hot spots". Such orbiting features explain observations at infrared wavelengths as well recent findings millimeter wavelengths. In wo...

The changes in apparent brightness or color, induced into a test spot by a surround, can be greatly enhanced either by flickering the test spot between two luminances, or by binocularly fusing a pair of test spots of different luminances. Simultaneous contrast, in which a white surround makes a grey spot look darker, is greatly enhanced if the spot (not the surround) flickers between black and ...

OBJECTIVE To describe and illustrate the geographic distribution of pedestrian crash sites in an urban setting (Montreal, Canada) with an alternative data source. METHODS Data on pedestrian victims were extracted for a 5-year period (1999-2003) from ambulance services information systems. The locations of crash sites and pedestrian victim density were mapped using a geographic information sys...

In some countries where the economies are weak, it becomes crucial for those concerned with developmental policies to adopt approaches which will ensure that every single cent available is used to develop the country. In those fields to facilitate a conductive environment for economic development. Road traffic accidents have been recognized as one of those adverse elements which contribute to t...