Neighborhood Effects Of Physical Interventions To Abandoned Housing

Many communities are facing new challenges due to the foreclosure crisis in terms of code enforcement and community stabilization. Older, industrial cities have been dealing with the effects of housing abandonment for many years. Previous studies have collected the best practices and prevailing trends for interventions to vacant and abandoned properties. Theoretical and quantitative evidence suggests that abandoned properties pose serious threats to the health and safety of surrounding neighborhoods. This study attempts to evaluate whether the physical interventions performed to abandoned homes can abate these adverse consequences. A survey of code enforcement officers in large, American cities along with Exploratory Spatial Data Analysis were performed to see this goal. The results suggest that maintenance interventions are able to abate neighborhood rates of fire and crime incidence to a much greater degree than demolition. This study is exploratory in nature and further research will be needed to quantify and better understand these results

Structure and ionic conductivity of B_i2O₃ substituted with lanthanide oxides

A neutron diffraction study was performed on (Bi2O3)O.80(Er2O3)0.20 in the temperature region of 300–1100 K. There is no long-range ordering of vacancies. It is concluded from diffuse scattering that at low temperatures short-range ordering appears, leading to the occurrence of relatively short Ln-O distances. At temperatures above 870 K the oxygen lattice disorders.\ud \ud In the low temperature region of Bi2O3-Ln2O3 solid solutions with the δ-Bi2O3 structure the activation energy of the conductivity is determined by the strength of the Ln-O band. In the high temperature region the energy necessary for oxygen ions to migrate through the tetrahedron planes plays a role

2,3,4-Tribromo­thio­phene

In the title compound, C4HBr3S, there are two essentially planar mol­ecules in the asymmetric unit. In the crystal structure, bifurcated C—H⋯Br hydrogen bonds link the mol­ecules into chains. Weak Br⋯Br inter­actions [Br⋯Br = 3.634 (4)–3.691 (4) Å] then lead to undulating sheets in the bc plane