Abstract: A device for computer aided surgery, including: a body; an optical element coupled to the body; a fiducial coupled to the body; and a calibration element. The calibration element be a pointer tip or a divot, either individually or in combination.

Abstract: A cooler comprising a container body having an exterior surface and at least a partially hollow interior. The container body has one or more receptacles formed within its exterior surface and extending into the hollow interior. The receptacles have enclosed bottom and side surfaces and open tops. The hollow interior of the container body is sealed and provides a fluid-tight reservoir to hold a fluid or a frozen or partially frozen fluid or gel. The container further contains a dispenser to permit the controlled release of fluid stored in the interior of the container.

Abstract: A cooler comprising a container body having an exterior surface and at least a partially hollow interior. The container body has one or more receptacles formed within its exterior surface and extending into the hollow interior. The receptacles have enclosed bottom and side surfaces and open tops. The hollow interior of the container body is sealed and provides a fluid-tight reservoir to hold a fluid or a frozen or partially frozen fluid or gel. The container further contains a dispenser to permit the controlled release of fluid stored in the interior of the container.

Abstract: The invention relates to a process aid for use in rigid thermoplastic compositions, and especially in rigid polyvinylchloride (PVC) compositions. The process aid is an acrylic terpolymer of methylmethacrylate, butyl acrylate and styrene at an optimal ratio to produce a significant reduction in melt process viscosity. The resulting reduction in extrusion melt torques enables manufacturers of rigid PVC products to have higher throughput production rates.

Abstract: A cooler comprising a container body having an exterior surface and at least a partially hollow interior. The container body has one or more receptacles formed within its exterior surface and extending into the hollow interior. The receptacles have enclosed bottom and side surfaces and open tops. The hollow interior of the container body is sealed and provides a fluid-tight reservoir to hold a fluid or a frozen or partially frozen fluid or gel. The container further contains a dispenser to permit the controlled release of fluid stored in the interior of the container.

Abstract: The invention relates to a process aid for use in rigid thermoplastic compositions, and especially in rigid polyvinylchloride (PVC) compositions. The process aid is an acrylic terpolymer of methylmethacrylate, butyl acrylate and styrene at an optimal ratio to produce a significant reduction in melt process viscosity. The resulting reduction in extrusion melt torques enables manufacturers of rigid PVC products to have higher throughput production rates.

Abstract: Testing process and apparatus for determining absorption properties of a porous specimen. The porous specimen is brought in a predetermined state of contact with the body of water held by a reservoir, for inducing water absorption in the porous specimen. A weight of the porous specimen is monitored for a predetermined time period once the contact is established to produce weight data over time. The predetermined state of contact is maintained substantially constant during the time period by permanent circulation of water in the reservoir. The absorption properties of the porous specimen are determined as a function of the weight data over time.

Abstract: Testing process and apparatus for determining absorption properties of a porous specimen. The porous specimen is brought in a predetermined state of contact with the body of water held by a reservoir, for inducing water absorption in the porous specimen. A weight of the porous specimen is monitored for a predetermined time period once the contact is established to produce weight data over time. The predetermined state of contact is maintained substantially constant during the time period by permanent circulation of water in the reservoir. The absorption properties of the porous specimen are determined as a function of the weight data over time.