Local region definition

Although MEPAS applications are often data intensive, the MEPAS documentation provides both application guidance (5) and definitions and sources of information for all input parameters (6). When available, site-specific data are used. Alternative procedures are provided for estimating emission, transport, and exposure parameter values for sites using local, regional, state, and federal information sources. 

While the original definition of a protein domain is based on the structure, it is also possible to detect re-usable modules in protein sequences. Local regions of... 

Virtual screening techniques require the definition of a chemistry space in order that the similarity (and distance) between compounds within the space can be quantified. Once a space has been defined, a diverse subset is one that covers the chemistry space well, whereas a focused subset is one that is restricted to a localized region within the space. A chemistry space is defined through the use of numerical descriptors, which can be calculated for molecules, as shown schematically in Fig. 1. The similarity (and... 

The formulation of a RTA product should be based on currently available information on active substance stability and compatibility (see Sect. 22.6). Definition of specific characteristics is relevant for the design and description of a RTA product. In several European countries this information is included a locally, regionally or nationally standardised document Parenteral Manual... 

The local Hamiltonian approaches obtain the local properties, like the electron density and the energy density, from the one-electron Hamiltonian locally, bypassing the solution to the eigenequations. " In other words, we do not need to have the whole system Hamiltonian, or the set of its delocalized eigenfunctions to calculate the electronic properties of a local region. The definition of the local properties and the choice of the local Hamiltonian are the two main ingredients of the local Hamiltonian approaches. The divide-and-conquer approach was the first of linear scaling methods and it is particularly well suited for calculations based on atomic orbitals. The method, which we describe in detail here, illustrates the idea of the local Hamiltonian approaches. 

One of the commonly used ventilation parameters is ventilation effectiveness, and it shows how certain regions in the room are influenced by contaminant sources introduced into the room. Three definitions of ventilation effectiveness are often used, namely, the ventilation effectiveness in the occupied zone the local ventilation index and the mean ventilation effectiveness They are defined as... 

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