Abstract: A system including a plurality of air vents, wherein the plurality of air vents are installed at a section of a room; a plurality of air ducts, in which at least one of the plurality of air ducts is configured to pump air into the room in conjunction with an HVAC system; a plurality of suction pumps, wherein the plurality of suction pumps are configured to suck air; a plurality of exhaust pipes connected to the plurality of suction pumps; a master suction pump, wherein the master suction pump is configured to receive the air sucked in by the plurality of suction pumps; an air filter device, wherein the air filter device is configured to disinfect the air received by the plurality of suction pumps.

Abstract: Sustained release drug formulations contain the pharmaceutical itself and a three component release rate controlling matrix composition. The three components of the matrix composition are (1) water insoluble polymer, such as ethyl cellulose, (2) pH dependent gelling polymer, such as sodium alginate, and (3) a pH independent gelling polymer, such as hydroxypropyl methylcellulose. The drug release rate can be adjusted by changing the amount of one or more of these components of the composition.

Abstract: The invention disclosed includes a method of and apparatus for measuring the subsurface bearing strength of soil and the frictional resistance of the soil to movement of a pile through the soil. A probe is used for this purpose that includes two relatively movable members, an inner plunger with a flat face, and an outer tubular member. By measuring the forces imposed by the soil at different locations on the probe as the relatively movable members of the probe are moved through the soil the bearing capacity and the skin friction of the soil can be calculated.

Abstract: The invention disclosed includes a method of and apparatus for measuring the sub-surface bearing strength of soil and the frictional resistance of the soil to movement of a pile through the soil. A probe is used for this purpose that includes three relatively movable members, an inner plunger with a flat face, an inner tubular member, and an outer tubular member. By measuring the force required to move the members through the soil together and separately the bearing capacity and the skin friction of the soil can be calculated.