Abstract: A method for damping aeroelastic modes, including limit cycle oscillations (LCO), is implemented by determining a mass for a tuned mass damper (TMD) based on an modal frequency for a mode having a potentially positive growth rate and attaching a TMD to at least one attachment point with significant motion such that a damping axis of the tuned mass damper is substantially oriented in a direction aligned with the local modal deflection.

Abstract: A method for damping aeroelastic modes, including limit cycle oscillations (LCO), is implemented by determining a mass for a tuned mass damper (TMD) based on an modal frequency for a mode having a potentially positive growth rate and attaching a TMD to at least one attachment point with significant motion such that a damping axis of the tuned mass damper is substantially oriented in a direction aligned with the local modal deflection.

Abstract: A composition of matter including a polymer sensitized to the heating effects of microwave energy which comprises said polymer and a microwave sensitizing amount of a particulate, layered compound comprising a tetravalent atom and a pentavalent atom, selected from the group consisting of elements of Group V of the Periodic Table of the Elements, and having an atomic weight of greater than 30, dispersed throughout said polymer.

Abstract: There are provided dry-set cement mortars comprising hydraulic cement and water soluble, high molecular weight polymers and gelatinous metal hydroxides and metal salts capable of forming gelatinous or hydrated hydroxides in the presence of aqueous base. These metal hydroxides and metal salts may be the hydroxides or salts of aluminum, the transition element metals, and the mixed salts of alkali metals or ammonium with certain trivalent metallic cations together with the appropriate anions. The novel sag resistant compositions allow for the replacement of asbestos fibers which are used to impart sag resistance in state-of-the-art dry-set Portland cement mortars.

Abstract: The water retentive properties of dry-set mortars containing water retentive agents such as cellulose ethers can be improved by the addition of small amounts of a promoter material such as ethylene glycol, diethylene glycol, propylene glycol, 1,3-propane diol, glycerol monoacetate and diacetate, ethyl glycolate and mono- and di-ethanol amines.

Abstract: There is provided a new sag resistance imparting agent selected from among gelatinous metal hydroxides and metal salts capable of forming a gelatinous or hydrated hydroxide in the presence of a water soluble alkaline material, the agent being useful for providing sag resistance in various adhesive compositions including (a) hydraulic non-dry-set compositions comprising an hydraulic cement or plaster of paris, and (b) non-hydraulic compositions comprising a room temperature hardening polymer in the form of a resinous liquid or an emulsion, suspension, dispersion, partial solution or total solution. Methods of imparting sag resistance to adhesive compositions such as the aforementioned and methods of use for the sag resistant compositions in the installation of wall and floor covering surfaces are also provided.

Abstract: There are provided dry-set cement mortars comprising hydraulic cement and water soluble, high molecular weight polymers and metal salts capable of forming gelatinous or hydrated hydroxides in the presence of aqueous base. These metal salts may be the salts of aluminum, the transition element metals, and the mixed salts of alkali metals or ammonium with certain trivalent metallic cations together with the appropriate anions. The novel sag resistant compositions allow for the replacement of asbestos fibers which are used to impart sag resistance in state-of-the-art dry-set Portland cement mortars.