Iskanje po repozitoriju

Opis: In this study, we examined the effects of information and communications technology (ICT) and financial development on mitigating gender inequality in Brazil, using autoregressive distributed lag (ARDL) approaches, between 1991 and 2022. The ARDL bounds test was employed to find the presence of co-integration within the series of data. Both in the short run and the long run, financial development has a significant negative impact on gender disparity; this means that policies aimed at enhancing women’s financial and consumption services should be promoted in the short run. In the long run, we can conclude that ICT developments lead to a decreasein gender inequalities, which may imply the need for strategic, long-term planning to increase ICT infrastructure, especially in deprived areas. This includes subsidising affordable internet, skills training for women in the ICT field, and promoting women’s participation in the technology industry. In addition, the impact of optimal financial development varies over time; hence, there is a need for flexibility and sustainability in financial development. Policy makers should therefore continue to strengthen and enhance financial inclusion initiatives, as well as regularly follow up on the impact of these initiatives on gender equality.
Ključne besede: gender inequality, information and communications technology, financial development, human capital index, agriculture
Objavljeno v RUP: 16.01.2026; Ogledov: 214; Prenosov: 0
Celotno besedilo (344,22 KB)

Opis: Background and purposeThe development of athletic performance requires a detailed assessment of the relationship between maximal strength and the ability to express it explosively. Traditional tests one-repetition maximum do not differentiate the rate of force development, which led to the introduction of the Dynamic Strength Index, defined as the ratio between force in the countermovement jump and the isometric mid-thigh pull . The aim of this paper was to present the theoretical background, methodological approaches, and practical applications of Dynamic Strength Index in order to optimize training and prevent injuries.Materials and methodsDynamic Strength Index is calculated by measuring peak force in countermovement jump and isometric mid-thigh pull tests using a force plate. Standardization of protocols (body position, contraction duration, software processing) is essential for validity. Test–retest reliability is high (Intraclass Correlation Coefficient >0.90). Normative values vary by sport and playing position: for example, sprinters and jumpers often record Dynamic Strength Index values >0.80, while weightlifters usually show lower values (<0.60).ResultsFindings indicate that DSI is an effective tool for training individualization. Values below 0.60 suggest the need for plyometric and ballistic training, while values above 0.80 point to a focus on maximal strength development. The optimal range (0.60–0.80) reflects a balanced profile. DSI is also useful for longitudinal monitoring of adaptations, adjusting training loads, and identifying injury risks. However, variability in testing protocols, anthropometric differences, and software processing may limit its applicability and comparability across studies.ConclusionDynamic Strength Index is a valuable biomechanical indicator linking maximal and explosive strength, allowing precise programming of training and performance monitoring. Its use has already been established in elite sports, but full validation requires measurement standardization and the development of sport-specific normative databases. Future directions include phase-specific force analysis within contraction cycles, expanding testing protocols, and integrating digital platforms for automated analysis.
Ključne besede: strength, index, performance
Objavljeno v RUP: 28.12.2025; Ogledov: 290; Prenosov: 3
Celotno besedilo (822,95 KB)
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Opis: O and Shi proved that the Randić index of any graph G with minimum degree at least δ and maximum degree at most Δ is at least sqrt(δΔ)/(δ+Δ) |G|, with equality if and only if the graph is (δ, Δ)-biregular. In this note we give a short proof via a more general statement. As an application of our more general result, we classify for any given degree range which graphs minimise (or maximise) the generalised Randić index for any exponent, and describe the transitions between different types of behaviour precisely.
Ključne besede: Randić index, bounded-degree graph, extremal problem
Objavljeno v RUP: 03.11.2025; Ogledov: 349; Prenosov: 2
Celotno besedilo (403,78 KB)

Opis: Let ▫$W(G)$▫ be the Wiener index of a graph ▫$G$▫. We say that a vertex ▫$v \in V(G)$▫ is a Šoltés vertex in ▫$G$▫ if ▫$W(G - v) = W(G)$▫, i.e. the Wiener index does not change if the vertex ▫$v$▫ is removed. In 1991, Šoltés posed the problem of identifying all connected graphs ▫$G$▫ with the property that all vertices of ▫$G$▫ are Šoltés vertices. The only such graph known to this day is ▫$C_{11}$▫. As the original problem appears to be too challenging, several relaxations were studied: one may look for graphs with at least ▫$k$▫ Šoltés vertices; or one may look for ▫$\alpha$▫-Šoltés graphs, i.e. graphs where the ratio between the number of Šoltés vertices and the order of the graph is at least ▫$\alpha$▫. Note that the original problem is, in fact, to find all ▫$1$▫-Šoltés graphs. We intuitively believe that every ▫$1$▫-Šoltés graph has to be regular and has to possess a high degree of symmetry. Therefore, we are interested in regular graphs that contain one or more Šoltés vertices. In this paper, we present several partial results. For every ▫$r\ge 1$▫ we describe a construction of an infinite family of cubic ▫$2$▫-connected graphs with at least ▫$2^r$▫ Šoltés vertices. Moreover, we report that a computer search on publicly available collections of vertex-transitive graphs did not reveal any ▫$1$▫-Šoltés graph. We are only able to provide examples of large ▫$\frac{1}{3}$▫-Šoltés graphs that are obtained by truncating certain cubic vertex-transitive graphs. This leads us to believe that no ▫$1$▫-Šoltés graph other than ▫$C_{11}$▫ exists.
Ključne besede: Šoltés problem, Wiener index, regular graphs, cubic graphs, Cayley graph, Šoltés vertex
Objavljeno v RUP: 10.09.2025; Ogledov: 459; Prenosov: 3
Celotno besedilo (456,75 KB)

Ključne besede: energy of a graph, Randić index, first Zagreb index, IRB index, extremal graph, spectrum, eigenvalue, metaheuristic
Objavljeno v RUP: 05.10.2023; Ogledov: 1830; Prenosov: 15
Celotno besedilo (1,02 MB)