SCIDAR - A Digital Archive of the University of Kragujevac

Existing methods for selecting the number of teeth in complex planetary gear systems are often methodologically demanding. They do not always ensure all conditions required for proper operation and assembly. This paper presents an analytical methodology for determining gear tooth numbers. The method is demonstrated on a Ravigneaux planetary gear set with seven kinematic links and two degrees of freedom. It ensures the simultaneous satisfaction of all meshing and assembly conditions. Starting ...

Cruise ships and superyachts have experienced significant global expansion throughout the 21st century. Although the growth in cruise passenger numbers was temporarily disrupted by the COVID-19 pandemic, occupancy rates have since rebounded and even exceeded pre-pandemic levels. This study highlights the significant environmental impact of cruise ships and luxury yachts, particularly in terms of air emissions and marine pollution. Emission levels associated with different fuel types and marin...

This paper presents the development of a systematic instrumentation methodology for continuous torque measurement in high-capacity shafts, based on the application of strain gauges. Within the proposed methodology, systematically derived solutions to the most important challenges in the development of instrumented shafts for torque measurement are presented, including the determination of optimal strain gauge locations, their arrangement and number, as well as the configuration of their conne...

Biodiesel fuel produced through transesterification is mainly used in blends with conven-tional diesel fuel (D100). The analysis of the combustion process parameters for each spe-cific biodiesel fuel represents the basis for a rational approach to the utilization of availa-ble motor fuel quantities. In this study, the differential and cumulative heat release laws during the combustion of D100 and blends of biodiesel fuel made from waste grape seed oil and D100 were analyzed. In addition, the ...

Traditional fault diagnosis methods often suffer from performance degradation under new working conditions due to distribution shifts between the source and target domains. To bridge this gap in cross-domain fault diagnosis (CDFD), the domain adaptation (DA) technique leverages transfer learning to align feature distributions, which facilitates knowledge transfer from labeled source domains to unlabeled target domains. Although existing studies on DA have demonstrated efficacy, they still fac...

In this paper, we study the spectrum of the Hamming matrix H(G) of a simple graph G. The Hamming matrix, recently introduced in terms of the Hamming distances between binary strings derived from the incidence matrix, offers an alternative and insightful perspective on spectral and chemical graph theory. We derive upper and lower bounds for the largest and smallest eigenvalues of the Hamming matrix of paths, respectively, as well as closed-form expressions for the Hamming spectrum and Hamming ...

In this paper, the problem of determining the metric dimension for special class of graphs, named complete split graphs 𝐾^∗_{𝑘,𝑛−𝑘} is considered. It is stated and proved formula for the metric dimension of this graphs: for 𝑛 − 𝑘 ≥ 2 and 𝑘 ≥ 2, as well as for 𝑘 = 1 and 𝑛 ≥ 3, metric dimension of 𝐾^∗_{𝑘,𝑛−𝑘} is equal to n −2, otherwise metric dimension of 𝐾^∗_{𝑘,𝑛−𝑘} is equal to 𝑛 − 1.

Digital transformation and the development of Large Language Models (LLMs) are significantly impacting the way software projects are planned and managed, with agile methodologies and frameworks (e.g., Scrum, Kanban) still requiring a high level of manual human involvement in the planning, prioritization, risk assessment, and reporting processes. This paper aims to define the concept and framework of AIA-PM (AI Agent-Powered Project Management) and explore the possibilities of applying...