The recent construction of integrable quantum field theories on two-dimensional Minkowski space by operator-algebraic methods is extended to models with a richer particle spectrum, including finitely many massive particle species transforming under a global gauge group. Starting from a two-particle S-matrix satisfying the usual requirements (unitarity, Yang-Baxter equation, Poincaré and gauge invariance, crossing symmetry, ...), a pair of relatively wedge-local quantum fields is constructed which determines the field net of the model. Although the verification of the modular nuclearity condition as a criterion for the existence of local fields is not carried out in this paper, arguments are presented that suggest it holds in typical examples such as nonlinear O(N ) σ-models. It is also shown that for all models complying with this condition, the presented construction solves the inverse scattering problem by recovering the S-matrix from the model via Haag-Ruelle scattering theory, and a proof of asymptotic completeness is given.
The energy efficiency gap has been presented as a prevalent paradox in the literature as individuals and firms fail to invest money or effort in seemingly highly profitable efficiency improvements. This article contributes to answering which management tools promote the realization of economic energy savings. This article first provides a comparison of the barriers to energy efficiency in firms from the literature with the prescriptions of ISO standards for energy management. Second, we provide empirical evidence that such ISO-certified large Austrian firms increased implementation of energy efficiency measures by 165% compared to those firms with business-as-usual decision-making methods. These higher conservation efforts observed support the hypothesis that ISO standards are an effective instrument to overcome efficiency barriers in an economic way. The main contributing factors for this achievement are the internalization of the identification process of savings potentials and setting up a stringent decision-making and governance process, thereby increasing implementation rates of measures.
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