Both the deformation characters and the failure mode of the large cross-sectional longwall installation roadway under compound roof are becoming an emergent issue than ever before due to the rapid development of modern mining equipment. Various engineering applications have revealed that the insufficient design and inappropriate support technology are the main reasons for the fatal accidents as...

The roof plate is an organizing center in the dorsal CNS that controls specification and differentiation of adjacent neurons through secretion of the BMP and WNT signaling molecules. Lmx1a, a member of the LIM-homeodomain (LIM-HD) transcription factor family, is expressed in the roof plate and its progenitors at all axial levels of the CNS and is necessary and sufficient for roof plate formatio...

This paper presents an overview of observed distresses on low slope roofing systems collected for the Building Envelope Life Cycle Asset Management (BELCAM) project. The data include over 14,000 visible distresses from 600 roofs from seven different climatic regions across Canada. The distresses encountered for built up roofs, modified bituminous roofs and a limited number of single-ply roofing...

The title compound, C(38)H(30)OP(2)S·CH(2)Cl(2), belongs to the xanthene family of ligands containing S- and O-donor atoms in the central heterocylic ring. Positions 2 and 8 on the xanthene backbone are functionalized with methyl groups to allow for the selective functionalization of the backbone at positions 4 and 6 with diphenyl-phosphanyl units. The title compound shows a significant 'roof-l...

Youth gangs are on the rise. Today they threaten virtually every major city, many small communities, and even rural areas. The Office of Juvenile Justice and Delinquency Prevention (OJJDP) is committed to helping communities overcome this problem, and an essential first step is understanding the factors that contribute to the growth of youth gangs and the relationship of gang membership to deli...

the membrane a microscopic section showed that the membrane had been replaced by a layer of adipose tissue permeated by blood-vessels. The subject of this note was a young married lady, who, some ?eleven years ago, sustained a compound fracture of the skull, caused by the accidental falling of a roof-tile. She was very seriously ill after the accident, being unconscious for a period, with the f...

In the title compound, [Zn(2)(C(8)H(7)N(3)OS)(2)(C(5)H(5)N)(2)], the Zn(2)O(2) ring has a flattened roof shape, with the roof angle equal to 10.10 (6)°. The thio-semicarbazones act as tridentate ligands to one Zn(II) atom, with the O atoms additionally in bridging positions to the second Zn(II) atom. Both Zn(II) atoms are five-coordinated; the coordination polyhedra are close to square pyramids...

In the title compound, C20H17NO3 (alternative name: N-hy-droxy-9,10-dimethyl-9,10-ethano-anthracene-11,12-dicarboximide), the rigid ethano-anthracene-dicarboximide moiety has a roof-shaped geometry, the inter-planar angle between the two terminal phenyl rings being 124.9 (6)°. In the crystal, mol-ecules are linked via O-H⋯O hydrogen bonds, forming chains along [010]. C-H⋯O and C-H⋯π inter-actio...