Generative Process Planning systems provide a powerful means of generating manufacturing process plans from a product model. However, the vast majority of current commercial and experimental systems are limited in several ways: they tend to be specialized for metal-machining processes, they tend to focus on one state of the product at a time, and in general they lack an intelligent product mode...

The iron(IV) nitrido complex PhB(MesIm)3Fe≡N reacts with 1,3-cyclohexadiene to yield the iron(II) pyrrolide complex PhB(MesIm)3Fe(η(5)-C4H4N) in high yield. The mechanism of product formation is proposed to involve sequential [4 + 1] cycloaddition and retro Diels-Alder reactions. Surprisingly, reaction with 1,4-cyclohexadiene yields the same iron-containing product, albeit in substantially lowe...

The oxidation of caffeine with persulfate and hydroxyl radicals in aqueous solution has been studied by EPR spectroscopy and HPLC analysis. In both cases the formation of 1,3,7-trimethyluric acid is observed as the main final product. A C8]OH radical adduct is postulated as the intermediate after reaction with OH~, and leads to the final product after further oxidation. This radical is too shor...

M any firms face environments with long manufacturing leadtimes, great product variety, and uncertain, nonstationary demand. A challenge is how to plan production and inventories to provide the best customer service at the least cost. In this paper, we first describe an application at Teradyne in which we implemented an inventory hedge to protect against cyclic demand variability. Based on this...

When extending a product line, how will the addition of the new product influence the purchase pattern of the existing products in the line? The behavioral literature offers two hypotheses— similarity and extremeness aversion—that make conflicting predictions about how the addition of a new extreme option should affect the choice shares of the original options in the set. In this paper, we arti...

An intermediate identifiable as the emitter in bacterial bioluminescence has been demonstrated. The reaction was carried out at 1 degrees C by mixing purified luciferase-bound FMN 4a-hydroperoxide with long-chain aldehyde (decanal). Simultaneous kinetic measurements of bioluminescence and absorbance showed that the decay of light emission occurred more rapidly than the appearance of the stable ...

Kinetic studies of the reactions catalyzed by adenylosuccinate synthetase with phosphorothioate derivatives of substrates for the forward and reverse reactions provide evidence for an intermediate on the reaction pathway. Guanosine-5’-0-(3-thiotriphosphate) (GTPyS) replaces GTP with a 12.5-fold reduction in the maximal velocity (at 22”C), although the K, for GTPyS is 3.5-fold lower than the K,,...

An extensive literature exists describing various techniques for the evaluation of Hankel determinants. The prevailing methods such as Dodgson condensation, continued fraction expansion, LU decomposition, all produce product formulas when they are applicable. We mention the classic case of the Hankel determinants with binomial entries 3k+2 k and those with entries 3k k ; both of these classes o...

A time-of-flight mass spectrometer equipped with two reflectrons was constructed for multiplexed photodissociation tandem mass spectrometry of peptide ions generated by matrix-assisted laser desorption ionization. A linear reflectron was used for high-resolution selection of a precursor ion while a quadratic reflectron was used for product ion analysis. With the photoexcitation of a precursor i...

A detailed experimental and theoretical investigation of the first-reported barrierless reaction between two closed-shell molecules [J. Chem. Phys. 127, 101101 (2007)] is presented. The translational energy and angular distributions of two product channels, HF+CH(2)SFCH(3) and F+CH(3)SFCH(3), determined at several collision energies, have been analyzed to reveal the dynamics of the studied reac...