Circular platforms

Figure 6-11. Dimensions, force, and local area for circular platforms.

Procedure 6-1 Design of Davits, 291 Procedure 6-2 Design of Circular Platforms, 296... 

The Morris (1984) water maze is a large circular glass tank (1.5m diameter) filled with opaque (e.g. dye-treated) water to a depth of some 50 cm. A small platform, large enough to take the rat, is placed in the water with its top about 1.5 cm below the surface, so it cannot be seen. When placed in the water the rat finds and escapes to the platform, the position of which is apparently learnt by reference to peripheral visual markers. Memory is demonstrated by the rat s ability to swim to the platform when put back into the water at various points and measured by the time or the length of path taken to do so (Fig. 18.3). 

Pfaff K (2012) Re-use of recycled materials in food contact applications in the perspective of consumer protection. Platform presentation (overheads) at the RiskCycle Conference risk-based management of chemicals and products in a circular economy at a global scale. 8-9 May 2012, Dresden, Germany (www.wadef.com/projects/riskcycle/)... 

The CEM Discover platform, introduced in 2001, offers a single-mode instrument based on the self-tuning circular waveguide technique (see Fig. 3.3). This concept allows for derivatization of the reactor to accommodate additional application-specific modules to address other common laboratory objectives. While the Discover ... 

The playground had a circular play area full of sand. There was a log-platform structure, with chains hanging from it, in the circular area and a slide on one side. The agent team climbed on the structure, stood on the platform, slid down the slide, and took off their shoes in the sand. There were also swings next to the play area and a jungle gym next to the sidewalk. 

It can be shown that the Sagnac effect with platform at rest is the rotation of the plane of linearly polarized light as a result of radiation propagating around a circle in free space. Such an effect cannot exist in the received view where the phase factor in such a round trip is always the same and given by Eq. (554). However, it can be shown as follows that there develops a rotation in the plane of polarization when the phase is defined by Eq. (553). It is now known that the phase must always be defined by Eq. (553). Therefore, proceeding on this inference, we construct plane polarized light as the sum of left and right circularly polarized components ... 

Locomotor coordination is most commonly assessed using a rotarod (Dunham and Miya 1957). The rotarod consists of a circular rod turning at a constant or increasing speed. Animals placed on the rod will naturally try to remain on the rod rather than fall onto a platform some 30 cm below. This test therefore provides an estimate of the animal s level of neuromuscular coordination. Drugs which are known to perturb neuromuscular coordination (e.g. benzodiazepines) clearly reduce the time the animals stay on the rod. 

The rat Morris maze we use consists of a circular water tank (150cm in diameter) tilled with water and maintained at 27 °C with an escape platform (15 cm in diameter) 18 cm from the perimeter always in the same position 2 cm beneath the surface of the water. The water is made opaque by addition of milk powder rendering the platform invisible. 

Flask Support A heat-resistant board, 5 to 7 mm in thickness and having a 10-cm circular hole, is placed on a suitable ring or platform support and fitted loosely inside the shield to ensure that hot gases from the source of heat do not come in contact with the sides or neck of the flask. A second 5- to 7-mm thick heat-resistant board, 14- to 16-cm square and... 

The water maze consists of a black circular pool (180 cm diameter x 80 cm high) filled to a depth of 25 cm with water of room temperature (Raveh et al, 2002). The pool is imaginarily divided into four same compartments numbered 1—4 clockwise. The black antireflective circular escape platform (15 cm diameter) is placed into compartment no. 1... 

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