Amplifying ribbon extensometer

Device provides accurate measurement of strain on flexible membranes and fabrics. It is compact and lightweight, has strain-amplification capability up to five, and has an accuracy better than one percent

Nozzle extraction process and handlemeter for measuring handle

Method and apparatus for quantitatively measuring the handle of fabrics and other flexible materials is presented. Handle is that term used to refer to the qualities of drapability, flexibility, compressibility, foldability, stretchability, pliability, etc., possessed by fabrics and other flexible materials. In the present invention the handle of a material sample is quantified by measuring the force required to draw the sample through an orifice and expressing the resultant extractive force as a function of test apparatus geometry and the amount of sample drawn through the orifice to arrive at quantitative measure of handle, to be defined as handle modulus, for the sample in question

Amplifying ribbon extensometer

A self-contained, nonelectrical strain gage capable of amplifying strain inputs and preserving the maximum strain measurement for later observance is presented

Kinetics and mechanisms of the reactions of aliphatic free radicals with organocobaloximes and fluoropentaamminecobalt(III) ion, and of iron(III) with methylrhodoxime

Benzyl, methyl, ethyl, and isopropyl(aquo)cobaloximes, RCo(dmgH)(,2)OH(,2), have been shown to undergo highly specific reactions in which a new carbon-carbon bond is formed in their reactions with aliphatic free radicals. Thus, benzylcobaloxime reacts with the (.)C(CH(,3))(,2)OH radical to yield PhCH(,2)C(CH(,3))(,2)OH and Co(\u27II)(dmgH)(,2)OH(,2). With the exception of benzyl and meta-chlorophenyl radicals, this reaction appears quite general for aliphatic radicals. The kinetics of the reaction between the organocobaloximes and the (.)C(CH(,3))(,2)OH and (.)CH(CH(,3))OC(,2)H(,5) radicals have been determined by novel kinetic competition methods. The organocobaloximes undergo an acid-base equilibrium in which one of the O-H(.)(.)(.)O groups of the (dmgH)(,2) pseudo-macrocycle is protonated. Both the protonated and unprotonated forms of the cobaloxime react, with k(,obs) at a fixed acid concentration related to the rate constants for the reaction of the protonated (k(,a)) and unprotonated (k(,b)) forms of the organocobaloxime by;(DIAGRAM, TABLE OR GRAPHIC OMITTED...PLEASE SEE DAI);The values obtained for the (.)C(CH(,3))(,2) radical are: (alkyl, 10(\u27-6) k(,a)/M(\u27-1) s(\u27-1), 10(\u27-6) k(,b)/M(\u27-1) s(\u27-1)) benzyl, 12.8 (+OR-) 0.60, 5.2 (+OR-) 0.2; methyl, 1.2, 0.71; ethyl, 0.79, 0.64; isopropyl, 0.49, 0.41. Corresponding values for the (.)CH(CH(,3))OC(,2)H(,5) radical are: benzyl, 19 (+OR-) 1, 5.9 (+OR-) 0.7; methyl, 1.7, 1.3; ethyl, 1.1, 0.66; isopropyl, 0.60, 0.60. The data are interpreted in terms of an addition-elimination mechanism involving one of the dimethylglyoxime ligands of the organocobaloxime;The reduction of Co(NH(,3))(,5)F(\u272+) by the (.)C(CH(,3))(,2)OH and(.)CH(CH(,3))OC(,2)H(,5) radicals has been studied by novel competitionmethods involving analysis of the fluoride ion produced in thereduction. The rate constants obtained at 25.0(DEGREES)C and 1.0M ionic;strength are (2.2 (+OR-) 0.3) x 10(\u276) M(\u27-1) s(\u27-1) and (1.1 (+OR-) 0.2) x 10(\u276) M(\u27-1) s(\u27-1), (.)C(CH(,3))(,2)OH and (.)CH(CH(,3))OC(,2)H(,5) radicals, respectively;(\u271)DOE Report IS-T-1034. This work was performed under ContractW-7405-Eng-82 with the Department of Energy

Canister closing device Patent

Design and characteristics of device for closing canisters under high vacuum condition

Traveling sealer for contoured table Patent

Sealing apparatus for joining two pieces of frangible material

Performance Feedback in Teacher Preparation: Improving Preservice Teachers’ Use of High Leverage Practices Through Mixed-Reality Simulation

Challenging classroom behaviors are a leading cause of beginning teachers’ stress and attrition. It has been a longstanding criticism that teacher preparation programs are not adequately providing preservice teachers with the proper strategies to help them deal with behavior problems effectively. This study examines the effects of performance feedback and deliberate practice using a mixed-reality simulation on preservice teachers’ use of high leverage practices. Simulators are well suited for training preservice teachers in high leverage practices because it allows for repeated practice and opportunities for performance feedback. Findings are presented from research on the use of performance feedback and deliberate practice within a controlled environment in a teacher preparation course for undergraduate general education preservice teachers. There were significant shifts in preservice teachers use and efficacy of three targeted high leverage practices. Findings hold implications for the preparation of special and general education teachers

Electronic equipment vulnerability to fire released carbon fibers

The vulnerability of electronic equipment to damage by carbon fibers released from burning aircraft type structural composite materials was investigated. Tests were conducted on commercially available stereo power amplifiers which showed that the equipment was damaged by fire released carbon fibers but not by the composite resin residue, soot and products of combustion of the fuel associated with burning the carbon fiber composites. Results indicate that the failure rates of the equipment exposed to the fire released fiber were consistent with predictions based on tests using virgin fibers