OBJECTIVE Identify a source of contamination to explain the increase in the number of cases of S. Paratyphi B var. Java infection. METHOD A descriptive study was conducted to gather more information about cases and potential risk factors for infection. Between January 2000 and June 2003, we identified and interviewed by questionnaire 53 people with S. Paratyphi B infection. Due to the suspect...

The swimming behaviour of ten species of diving beetles was studied with a video image analysing system, with the aim of testing the interpretation of their size and shape as functional characters reflecting adaptations to different swimming strategies. Velocity, sinuosity of the trajectory, and the relation between the two were studied in an unobstructed aquarium and, for the four largest spec...

F my house in Fairbanks, Alaska, I see Mt. McKinley 250 km to the southwest. One hundred fifty kilometers to the south is Mt. Hayes, and 200 km to the southeast is Mt. Hadjukovich. But in the winter it is often hard to know what these Alaska Range mountains really look like. They appear as mirages, distorted into towering images, squashed images, inverted images, or floating images (see Figs. 1...

argulus foliaceus (crustacea: branchiura), or the fish louse, is an ectoparasite of the skin or gill of the fresh water fish species. clinical signs in infected fish include scratching on aquarium walls, erratic swimming, and poor growth. it causes pathological changes due to direct tissue dam­age and secondary infections. in the present study, lionhead goldfish (carassius auratus ), taken from...

tion of the object wavefunction in amplitude and phase from the measured data. However, before we can make a measurement of a quantum state we have to prepare that state. In the case of the caesium atom this job was done by the first object pulse. Can we prepare any desired state, that is, a target state? This is an issue that arises in many disciplines — ranging from physical chemistry, throug...