Because urbanists designed each zone having into account population density, transportation infrastructure, and administrative boundaries, the exposure parameter also allowed to control indirectly for these potential covariates.
The events do not necessarily reflect linearity, although they may be related, nor do they conform to the conventional boundaries for exposure and response.
Since different vulnerabilities and sometimes different health effects manifest at different developmental stages, any exposure-only judgment will run into significant difficulties defining spatial and temporal boundaries for exposure determinations.
The precise delimitations of the transmembrane helices of connexins remain uncertain; unlike many membrane proteins, the connexin amino acid sequence does not have a conspicuous clustering of aromatic residues at the boundaries between exposure to lipid headgroups and acyl tail [ 129, 130].
The concept of adiabatic surface temperature (AST) is applied for DTBP pool fires to circumvent the difficulty of defining the fire exposure boundary condition at the solid surface.
When epidemiologists select a study population, they are, by default, defining a system boundary for the exposure assessment process.
In fact, the ablations, lateral compressions and isoxaben treatments that are included in our manuscript are more consistent with the situation at the boundary: a prolonged exposure to mechanical stress.
Instead, the likely limit of dispersion for landfill emissions (2 km) was estimated based on published information and used as an exposure boundary around each site, degree of hazard for exposure was derived from the type of license held by the operator, and the epidemiologic analysis assumed a common relative risk for all landfill sites.
Large amounts of plate-like μ phase weakened the strength of γ matrix by the depletion of solid solution strengthening elements, while the precipitation of discrete M23C6 carbides along grain boundaries were attributed to the strengthening of grain boundaries after thermal exposure at 900 °C in comparison with those at 1000 °C.
This bias arises when there is uncertainty in the outline of the limit of exposure zones, as pollutants do not respect boundaries [ 53].
