arXiv subjects

Dominik Nowak

Publications and source records attributed to Dominik Nowak.

3 recordsLinked to original sources

arXiv2026

Hidden or Formal Architects: Understanding Who Makes Architectural Decisions in Practice

Empirical research on software architecture sometimes focuses on individuals holding the formal title of software architect. However, not all companies have individuals hired in such roles. Despite no formal architects, all systems have architectures, and there must be practitioners making the architectural decisions. This study aims to identify who, in practice, makes architectural decisions and in what environments the existence of a formal architect is perceived as necessary. This research employed a method consisting of a questionnaire with 54 participants from different companies and seven follow-up interviews. The findings indicate that architectural decisions are often made by individuals without a formal architect title. A formal architect is perceived as essential mainly in large companies and large teams. The results of this study show that many practitioners taking part in ADM may have been omitted by previous research, particularly if it focused on formal architects.

cs.SE↗

arXiv2024

Diffusion Limit of the Low-Density Magnetic Lorentz Gas

We consider the magnetic Lorentz gas proposed by Bobylev et al. [4], which describes a point particle moving in a random distribution of hard-disk obstacles in $\mathbb{R}^2$ under the influence of a constant magnetic field perpendicular to the plane. We show that, in the coupled low-density and diffusion limit, when the intensity of the magnetic field is smaller than $\frac{8\pi}{3}$, the non-Markovian effects induced by the magnetic field become sufficiently weak. Consequently, the particle's probability distribution converges to the solution of the heat equation with a diffusion coefficient dependent on the magnetic field and given by the Green-Kubo formula. This formula is derived from the generator of the generalized Boltzmann process associated with the generalized Boltzmann equation, as predicted in [4].

math-ph↗

arXiv2024

The Lorentz Gas in a Mean-Field Potential: Weak Coupling and Diffusive Regime

We investigate the diffusive scaling of the Lorentz gas in the presence of an external force of mean-field type. In the weak coupling regime and for diffusive time scales, the test particle's law converges to the probability density satisfying the heat equation. The diffusion coefficient of the heat equation is given by the Green-Kubo relation.

math-ph↗