Abstract This paper addresses the efficiency measurement of firms composed by multiple components, and assessed at different decision levels. In particular it develops models for three levels decision/production: subunit (production division/process), DMU (firm) industry (system). For each level, inefficiency is measured using a directional distance function developed measures are contrasted wi...

Goal decomposition structures lie at the heart of goal modeling languages such as i*. High-level goals of stakeholders are recursively decomposed into lower level ones and eventually into leaf level tasks to be performed by agents. The decomposition structure can also develop through a bottom up approach whereby higher-level goals are introduced as justifications for existing low-level ones. Th...

Domain decomposition is a well known technique in parallel computing. It requires the decomposition of a problem domain into sub-domains. This involves also a decomposition of the data structures for the problem into substructures, one for each sub-domain. If the data structures are complex, then the decomposition of the data structures may be a complicated task. This paper will show how the pr...

A novel unitary directional wavelet methodology producing six complex-valued subbands per level of decomposition has been previously introduced [1,2] as a method of spatio-frequency decomposition for image fusion applications. Properties of the decomposition include unitarity, sparse computation, energy-packing efficiency, symmetry, and sub-pixel registration of all subbands at the same scale. ...