Braided textile materials are widely used in many industries and agriculture. tapes for domestic purposes, the food industry, construction, medicine, aircraft manufacturing, electrical engineering, etc. Every braided product must correspond to a unique group of parameters properties, depending on initial manufacturing parameters. The production is still insufficiently explored. In process desig...

We present a generalization of standard Turing machines based on allowing unusual tapes. We present a set of reasonable constraints on tape geometry and classify all tapes conforming to these constraints. Surprisingly, this generalization does not lead to yet another equivalent formulation of the notion of computable function. Rather, it gives an alternative definition of the recursively enumer...

In the title compound, C10H5BrO3, a brominated 3-formyl-chromone derivative, all atoms are essentially coplanar (r.m.s. = 0.0631 Å for the non-H atoms), with the largest deviation from the least-squares plane [0.215 (3) Å] being for the formyl O atom. In the crystal, mol-ecules are linked into tapes through C-H⋯O hydrogen bonds and these tapes are assembled by stacking inter-actions [centroid-c...

In the title compound, C(9)H(7)N(3), the N-bound methyl group and vinyl H atom are syn. The 12 non-H atoms comprising the mol-ecule are essentially coplanar (r.m.s. deviation = 0.071 Å). Supra-molecular tapes feature in the crystal packing, orientated perpendicular to [10-1], and are formed by C-H⋯N inter-actions involving each cyano N atom. The tapes are connected into layers via π-π inter-act...

The title compound, C(12)H(18)N(6)O(6), was synthesized via nucleophilic substitution by reacting 2,4,6-trichloro-1,3,5-triazine with glycine methyl ester hydro-chloride in reflux (dried toluene) under anhydrous atmosphere. Individual mol-ecules self-assemble via strong N-H⋯O hydrogen bonds into supra-molecular double tapes running parallel to the [010] crystallographic direction. The close pac...

The weak electrostatic and dispersive forces between C(δ+)-F(δ-) and H(δ+)-C(δ-) are at the borderline of the hydrogen-bond phenomenon and are poorly directional and further deformed in the presence of other dominant inter-actions, e.g. C-H⋯π. The title compound, C(6)H(4)F(2), Z' = 2, forms one-dimensional tapes along two homodromic C-H⋯F hydrogen bonds. The one-dimensional tapes are connected ...