In the crystal structure of the title complex, [Al(CH(3))(2)(C(17)H(30)N(3))], the Al(III) cation is coordinated by two methyl ligands and two N atoms from the guanidinato ligand in a distorted tetra-hedral geometry. The dihedral angle between the CN(2) and AlC(2) planes is 85.37 (2)°. The two N atoms of the guanidinato ligand exhibit an almost uniform affinity to the metal atom.

‘Suppose a region [= volume] v of constant shape to be occupied by the molecule which for the present purposes is defined as the region into which salt does not penetrate when a salt solution is substituted for water. It is assumed that the density of the liquid outside v is uniform. The effect on the value of F [= structure factor] of increasing density everywhere outside v is equivalent to th...

A new method to calculate the electric field inside a spherical shell with surface charge in terms of solid angle is presented. The integral can be readily carried out without invoking special functions typically used for this classical problem. For flat uniform density, normal shown proportional subtended by only.

The GlueX experiment will employ a linearly polarized 9 GeV tagged photon beam incident on a liquid hydrogen target to search for exotic states in the light meson spectrum. Optimized for this purpose, the detector has a highly uniform acceptance over nearly 4π solid angle, with high efficiency for both neutral and charged final state particles. An overview of the physics motivation and detector...

Q1: What is the diagnosis? The diagnosis is pycnodysostosis, which is a rare form of skeletal dysplasia characterised by moderate and generalised osteosclerosis. The diagnosis is based on clinical features and radiological findings. The cardinal features are short stature, large open fontanelles (the fontanelles may remain open even in adulthood), an obtuse mandibular angle, dysplastic clavicle...

Formulas are derived for the probability density function and the probability distribution function of the largest canonical angle between two p-dimensional subspaces of Rn chosen from the uniform distribution on the Grassmann manifold (which is the unique distribution invariant by orthogonal transformations of Rn). The formulas involve the gamma function and the hypergeometric function of a ma...

We demonstrate controllable light deflection in thick metal gratings with periodic subwavelength slits filled with an active material. Under specific illumination conditions, the grating becomes nearly transparent and acts as a uniform optical phased-array antenna where the phase of the radiating elements is controlled by modifying the index of refraction of the material that fills each slit. T...