Hugh Thompson

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One of the more critical failure modes of concrete crossties in North America is the degradation of the concrete surface at the crosstie rail seat, also known as rail seat deterioration (RSD). Loss of material beneath the rail can lead to wide gage, cant deficiency, reduced clamping force of the fastening system, and an increased risk of rail rollover.(More)
  • R J Littel, G F Versteeg, W P M Van Swaaij, On The Kinetics, B Philipp, H Dautzenberg +23 others
  • 2001
of COS with primary and secondary amines in aqueous solutions.dung und Zersetzung von Monothiocarbonat in wiissrige LBsung. Effect of heterocyclic amine additives on the absorption rates of carbonyl sulfide and carbon dioxide in aqueous methyl-diethanolamine solutions. of reactions of carbonyl sulphide and carbon dioxide with amines and catalysis by(More)
The title compound, (1R,2R,3S,5S,8S)-3-hydr-oxy-8-methyl-8-azoniabicyclo-[3.2.1]octane-2-carboxylic acid chloride, C(9)H(16)NO(3) (+)·Cl(-), is both a metabolite and a precursor of the tropane alkaloid l-cocaine. The carboxyl group is not involved in dimerization, but instead donates a hydrogen bond to the chloride counter-ion, which participates in two(More)
P art 1 of this article started my examination of why cryptography doesn't seem to have done much for digital privacy, although it has been relatively successful at improving security. 1 I separated two visions: ■ " Cypherpunk Crypto " —the dream of wielding crypto as a weapon for social and political change, and ■ " Pragmatic Crypto " —a more down-to-earth(More)
The crystal structure of the title compound, C15H12O3, displays catemeric aggregation involving O-H⋯O hydrogen bonds progressing from the carboxyl group of one mol-ecule to the ketone O atom of another glide-related neighbor. The mol-ecule is twisted, with the toluene 80.61 (3)° out of plane with respect to the phenyl group of the benzoic acid. The acid(More)
In the crystal structure of the title compound, C(9)H(8)O(3), essentially planar mol-ecules [the carboxyl group makes a dihedral angle of 4.53 (7)° with the plane of the ring, while the acid group forms a dihedral angle of 3.45 (8)° to the ring] aggregate by centrosymmetric hydrogen-bond pairing of ordered carboxyl groups. This yields dimers which have two(More)
The asymmetric unit of the title compound, C(8)H(12)O(3), consists of a single conformational enanti-omer, which aggregates in the catemeric acid-to-ketone hydrogen-bonding mode [O⋯O = 2.682 (4) Å and O-H⋯O = 172 (6)°]. Four hydrogen-bonding chains of translationally related mol-ecules pass through the cell orthogonal to the 4(3) screw axis along c,(More)