The aim of the study was to examine identity statuses in various life domains and the relationship between identity and well-being. We adopted the three-dimensional model of identity (Crocetti et al., 2008), including: in-depth exploration, commitment, and reconsideration of commitment. Moreover, in accordance with domain-specific approach (Goossens, 2001), we sought to empirically derive identity statuses in various life domains. The participants included 835 emerging adults (Mage = 21.81, SD = 2.33). We examined eight domains previously identified in qualitative research: personality characteristics, past experiences, family, friends and acquaintances, worldview, hobbies and interests, aims and plans for the future, and occupation. To measure three identity processes, we used a modified version of the Utrecht-Management of Identity Commitments Scale (Crocetti et al., 2008) and to measure well-being we used the Mental Health Continuum-Short Form (Keyes, 2013). Results indicate that, although the statuses identified in previous research were, to a large extent, replicated (except moratorium), people were classified in different statuses in different domains; thus, we conclude that talking about statuses should be limited to a given domain. Well-being was the highest in achievement statuses and the lowest in diffusion, but only in two examined domains: personality characteristics and past experience.

The paper presents the problem of sensorless control of a permanent magnets synchronous motor (PMSM) without a damping cage for fan applications. Frequency control was used according to the principle of v/f = const. In order to reduce the power consumption of the drive system, the optimal voltage to the motor frequency characteristics was tested in the laboratory. The experimental studies was performed on a laboratory set of a drive consisting of two coupled PMSM machines, where one machine was supplied by a transistor inverter and the other was a passive load. A new criterion based on minimizing the module of stator current vector was proposed and an optimization algorithm in steady states was tested. The results of laboratory tests confirmed the validity of the applied solution for the fan drive.