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International Review of Applied Sciences and Engineering
Authors:
Éva Bácsné Bába
,
György Norbert Szabados
,
Szabolcs Gergely Orbán
,
Zoltán Bács
,
Renátó Balogh
, and
Sándor Kovács

Abstract

Many sports organisations operate as non-profits, but the emphasis and role of for-profits in this sector cannot be avoided. Today, sports activities are connected to the business sector and generate profit, hence, sports sector is a decisive part of the economy. Sport profile companies differ in their organisational strategy formulation approach. The main focus was to learn more about their strategy approach and market behaviour. 350 sports business organisations were involved in a survey of 3,248 companies, and the Chi-square test, variance analysis, and principal component analysis were applied to the sample. Results showed that 75.7% of the responding sports companies had no written strategic plan. The availability of written strategies seemed to depend on the organisation's scale. The market-following behaviour was confirmed in the case of smaller sports enterprises. Fitness service providers appeared to follow a market-leading behaviour. Growth, investment, and development naturally emerged as essential factors for companies with higher sales revenue and operating sports facilities, and they were relatively less important in sports goods production and trade. Most of the results showed that in the sports business sector, large-scale organisations focus on strategic-related issues more than other players in the industry.

Open access

Abstract

The control of the Mediterranean and its surroundings by the conquering Roman Republic after the victory over Carthage, and later over the Hellenistic kingdoms throughout the 2nd and 1st centuries BC, notably increased connectivity and the movement of people. This paper focuses on the wide range of ritual instruments, above all the propitiation of the gods through sacrifices, in the face of journeys in general, and on the diverse religious resources documented in the epigraphy of the Latin West.

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Abstract

One critical issue in the tracking systems based on photovoltaic (PV) is how to harvest highest power of the photovoltaic array; particularly when the system is operating in partially shaded conditions (PSCs) or varying irradiances. This study proposes particle swarm optimization (PSO) hybridization and cuckoo search algorithm (CSA) methods for maximum power point tracking (MPPT). The effectiveness of the proposed algorithm is validated and examined under various irradiance patterns. A comparison study in performance has been conducted between the proposed hybrid CSA-PSO method with the conventional P&O and PSO techniques. Several tests have been performed based on numerical simulations utilizing the programming software MATLAB/Simulink. The results demonstrated that the suggested hybrid technique yields smaller tracking time, higher power and greater efficiency than those of other traditional algorithms.

Open access

Abstract

Infectious diseases pose a formidable global challenge, compounded by the emergence of antimicrobial resistance. Consequently, researchers are actively exploring novel antimicrobial compounds as potential solutions. This endeavor underscores the pivotal role of methods employed for screening and evaluating antimicrobial activity—a critical step in discovery and characterization of antimicrobial agents. While traditional techniques such as well-diffusion, disk-diffusion, and broth-dilution are commonly utilized in antimicrobial assays, they may encounter limitations concerning reproducibility and speed. Additionally, a diverse array of antimicrobial assays including cross-streaking, poisoned-food, co-culture, time-kill kinetics, resazurin assay, bioautography, etc., are routinely employed in antimicrobial evaluations. Advanced techniques such as flow-cytometry, impedance analysis, and bioluminescent technique may offer rapid and sensitive results, providing deeper insights into the impact of antimicrobials on cellular integrity. However, their higher cost and limited accessibility in certain laboratory settings may present challenges. This article provides a comprehensive overview of assays designed to characterize antimicrobial activity, elucidating their underlying principles, protocols, advantages, and limitations. The primary objective is to enhance understanding of the methodologies designed for evaluating antimicrobial agents in our relentless battle against infectious diseases. By selecting the appropriate antimicrobial testing method, researchers can discern suitable conditions and streamline the identification of effective antimicrobial agents.

Open access

Abstract

Composite materials are vulnerable to impacts that may occur during their use. Such transverse loads represent a significant threat to these materials because they can cause damage that is difficult to detect. Thus, understanding the mechanical behavior of composite materials during impacts is crucial for improving their damage resistance. Therefore, this study investigates the response of two commonly used composite panels in maritime transportation—a PVC core sandwich composite and a laminated GFRP composite—under quasi-static indentation (QSI). Using numerical simulations with Abaqus/Explicit, this investigation aims to anticipate mechanical characteristics and damage patterns during low-velocity impact. Results show a strong correlation between numerical and experimental data. The force-displacement curves aid in understanding damage sequences, with predicted maximum loads at 1.43% and 6.45% accuracy for laminated and sandwich composites. Both exhibit significant damage, including permanent indentation, matrix cracks, fiber fractures, and prevalent delamination around the impact point.

Open access

“Returning Home in the Greek and Roman World”

Symposium Classicum Peregrinum, June 10–12 and 16, 2022 Messina and Taormina

Acta Antiqua Academiae Scientiarum Hungaricae
Author:
Patricia A. Johnston
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Abstract

This study evaluates metallic yield dampers, specifically slit steel dampers, for protecting steel beam-to-column connections during seismic events. Finite element model simulations were conducted for the damper and its connection. Analysis of circular parameters, like the radius slot, showed that appropriately sized slit dampers exhibit advantageous seismic behavior. Moment-rotation, hysteresis curves, and plastic stresses comparisons indicate efficient energy absorption. The maximum moment was 25% lower than conventional samples. The slit steel damper model with a ductility factor of 3.5 allows significant plastic deformation before potential failure. Results emphasize the slit damper's potential for optimal performance in steel frames, suggesting its use for efficient energy absorption.

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Very recently, the authors in [5] proposed the exponential-type operator connected with x 4 3 and studied its convergence estimates. In the present research, we extend the study and obtain the general form of its 𝑝-th order moment; 𝑝 ∈ ℕ ∪ {0}. Further, we establish the simultaneous approximation for the operator under consideration.

Open access

Abstract

This article focuses on two stories contained in Deipnosophists 15 by Athenaeus of Naucratis. Both stories are comprised in the section in which Athenaeus discusses the use of crowns in festive rituals. Athenaeus attributes the first story (672a–e) to Menodotus of Samos. Here we read that some Tyrrhenians went to Samos to steal the simulacrum of Hera. But, having boarded the ship with the statue, they were unable to set sail. Thus, they unloaded the simulacrum on the shore and left. Then the heroine Admete retrieved it and took it back to the temple. For this reason, every year since then, the inhabitants of Samos celebrated the feasts called Tonaia in honor of Hera. The second story, that Athenaeus draws from Polycarmus of Naucratis (675f–676b), tells of a certain Herostratus who, on his return journey from Cyprus to Naucratis, was saved from a storm thanks to the sailors' prayers to the statue of Aphrodite on board. Thereafter, Herostratus prepared a banquet at the temple of the goddess to honor her. These stories introduce the recurring motif, also found in other sources, of travelling divine statues, which display supernatural powers.

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Adalékok a mesmerizmus korai történetéhez Magyarországon – Gecse Dániel (1768–1824), az erdélyi magnetizőr halálának 200. évfordulója apropóján

Contributions to the early history of mesmerism in Hungary – on the occasion of the 200th anniversary of the death of Daniel Gecse (1768–1824), a Transylvanian magnetiseur

Orvosi Hetilap
Author:
László Kiss
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