Organizations characterized by a climate and culture of competition and overwork facilitate the emergence of the workaholism phenomenon, as they provide favorable conditions for employees to spend more time in the workplace. Many of these employees are successful in their careers both in financial terms and in job satisfaction. This article aims to study the influence of workaholism on the perception of career success. The sample consists of 234 Portuguese individuals who were working in a professional context. The results reveal that pleasure at work influences career success perception in both objective and subjective dimensions and that work involvement influences only the subjective dimension of the career success perception. The findings of this study will contribute to the increase of knowledge in the workaholism and career success areas in light of the coronavirus disease 2019 pandemic so that companies are able to adopt strategies in order to optimize their resources and increase their productivity.

The adjoint method, recently introduced by Evans, is used to study obstacle problems, weakly coupled systems, cell problems for weakly coupled systems of Hamilton − Jacobi equations, and weakly coupled systems of obstacle type. In particular, new results about the speed of convergence of some approximation procedures are derived.

In this paper we study systems of weakly coupled Hamilton-Jacobi equations with implicit obstacles that arise in optimal switching problems. Inspired by methods from the theory of viscosity solutions and weak $\text{KAM}$ theory, we extend the notion of Aubry set for these systems. This enables us to prove a new result on existence and uniqueness of solutions for the Dirichlet problem, answering a question of F. Camilli, P. Loreti, and N. Yamada.

The main objective of this paper is to prove new necessary conditions to the existence of KAM tori. To do so, we develop a set of explicit a-priori estimates for smooth solutions of Hamilton-Jacobi equations, using a combination of methods from viscosity solutions, KAM and Aubry-Mather theories. These estimates are valid in any space dimension, and can be checked numerically to detect gaps between KAM tori and Aubry-Mather sets. We apply these results to detect non-integrable regions in several examples such as a forced pendulum, two coupled penduli, and the double pendulum.