With the growing share of distributed energy sources and energy storage, the problem of high-voltage line overloads is becoming one of the key challenges of modern power systems. This paper proposes a method to eliminate transmission line overloads by coordinating power changes among selected generation units, loads, and energy storage units, with network reconfiguration as needed. A key element of the proposed approach is identifying the controllable elements most strongly associated with overload patterns in post-contingency scenarios. These elements were identified using statistical correlation coefficients describing the relationship between line loading levels and the power generated, consumed, or stored at individual buses. Correlation analysis was used to determine a subset of candidate elements most relevant to the observed overload patterns, thereby reducing the dimension of the control problem. The proposed approach enables effective overload reduction while simultaneously reducing the problem's dimensionality. The results indicate that it can be a useful tool supporting network management under conditions of high generation and load variability.
This study examines the influence of facilitation preference on the desirability of four volunteering benefits: feeling useful, positive social interactions, helping others, and having an enjoyable experience. The moderating effects of brand strength on the proposed relationships are also examined. Data were collected (N = 490) from an online survey panel and analyzed using PLS-SEM. The results indicate that facilitation preference has a positive influence on all four desired benefits of volunteering, confirming its relevance for volunteer recruitment. The results also confirm the negative moderating role of brand strength, weakening the proposed relationships between facilitation preference and the relative desirability of two benefits, feeling useful and positive social interactions. We propose that by increasing the organization's brand strength, individuals' reliance on social reassurance associated with facilitation preference is attenuated. Practical implications, limitations and recommendations for future research are discussed.
Although cyber risk is widely recognized as a critical organizational threat, how firms configure internal roles and practices to address it remains poorly understood. This study offers insights into that question. In practice, two professional roles share the job of cyber risk assessment and assurance: cybersecurity specialists, who focus on the technical side of assurance, and internal auditors, who focus on governance, processes, and compliance. Drawing on 36 interviews across a range of organizations, we explain how these professional roles collaborate, when collaboration breaks down, and why working together is often difficult. We identify five common patterns of working across professional boundaries, ranging from rival parallel assessments to genuinely integrated work. As exposure to cyber threats rises because of regulation, critical operations, or greater digital dependence, accountability pressures increase, and managers and professionals spanning across the two professional roles act as connectors and engage in coordination across domains. We also show how standard risk-management templates and reporting tools can shift from being symbolic checklists to becoming practical coordination mechanisms. Overall, the study offers a framework for building more integrated cyber risk assessment and assurance, with relevance for other emerging risks that demand cross-functional expertise. Bien que le cyberrisque soit largement reconnu comme une menace s & eacute;rieuse pour les organisations, les modalit & eacute;s selon lesquelles les entreprises d & eacute;finissent les r & ocirc;les et les pratiques en interne pour y faire face restent floues. Cette & eacute;tude apporte un & eacute;clairage plus complet sur cette question. Dans la pratique, le travail entourant l'& eacute;valuation et l'assurance des cyberrisques est partag & eacute; par deux r & ocirc;les professionnels : les sp & eacute;cialistes en cybers & eacute;curit & eacute;, qui se concentrent sur les aspects techniques de l'assurance, et les auditeurs internes, qui se concentrent sur la gouvernance, les processus et la conformit & eacute;. En s'appuyant sur 36 entretiens men & eacute;s au sein de diverses organisations, les auteurs & eacute;tudient les modes de collaboration entre ces r & ocirc;les professionnels, les points de rupture des liens de collaboration, et les causes des difficult & eacute;s r & eacute;currentes li & eacute;es au travail commun. Ils identifient cinq tendances communes inh & eacute;rentes au travail interprofessionnel, allant de la r & eacute;alisation simultan & eacute;e d'& eacute;valuations concurrentes & agrave; un travail v & eacute;ritablement int & eacute;gr & eacute;. & Agrave; mesure que le niveau d'exposition aux cybermenaces augmente en raison de la r & eacute;glementation, des op & eacute;rations essentielles ou d'une plus grande d & eacute;pendance num & eacute;rique, les pressions en mati & egrave;re de responsabilit & eacute; s'intensifient. D & egrave;s lors, les gestionnaires et les professionnels occupant ces deux r & ocirc;les professionnels agissent comme des connecteurs et assurent la coordination entre les domaines. Les auteurs d & eacute;crivent & eacute;galement comment les mod & egrave;les standard de gestion de risques et les outils de communication de rapports peuvent & eacute;voluer d'un usage symbolique (listes de v & eacute;rification) & agrave; un usage pratique (m & eacute;canismes de coordination). Dans l'ensemble, l'& eacute;tude propose un cadre pour d & eacute;velopper une approche plus int & eacute;gr & eacute;e de l'& eacute;valuation et de l'assurance des cyberrisques, applicable & agrave; d'autres risques & eacute;mergents n & eacute;cessitant une expertise interfonctionnelle.
This study compares the effects of pulsed and continuous ultrasound at two frequencies (28 and 40 kHz) on hybrid electrocoagulation (EC) systems for the treatment of compost wastewater, combining zeolite addition with different electrode pairs (Al/Al, Fe/Fe, Zn/Zn, and Al/Fe). The experimental investigation addressed four complementary aspects: (i) effluent quality and treatment efficiency evaluation through solution parameters monitoring, (ii) electrode degradation assessment through mass loss measurements and surface analysis, (iii) sedimentation analysis, and (iv) operational costs evaluation in terms of electrode and energy consumption. Process optimization was conducted using a mixed Taguchi L8 design to quantify the combined influence of electrode pairs, ultrasound mode and frequency, zeolite addition, and treatment time on pollutant removal and electrode wear. Operational cost calculation demonstrated that electrode material, ultrasound mode, and frequency, along with applied current and voltage, collectively govern electrode wear and Faraday efficiency, with pulsed ultrasound at 40 kHz and Al electrodes minimizing anodic mass loss and energy consumption. The Taguchi analysis revealed that zeolite addition is the most influential factor negatively affecting COD and turbidity. Meanwhile, the optimal operational parameters for overall performance were identified as an Al/Al electrode pair, a 40 kHz ultrasound frequency, pulsed mode, a 10 min treatment time, and the absence of zeolite. These findings provide practical guidance for designing hybrid pulsed ultrasound EC processes that are both effective and economically sustainable for complex wastewater treatment.
This article presents the results of hydrological research on the Ruda River, which is the largest tributary of the Cetina River, located in the Dinaric karst of Croatia. The hydrology of this river has been altered after the construction of the Orlovac Hydropower Plant (HP) and the Bu & scaron;ko Blato reservoir in 1973. The main aim of this study was to generate new knowledge about the hydrological functioning of the river, with a focus on the discharge and water temperature regimes that experienced the most severe alterations. The methodology is based on classical hydrological, statistical, and time-series analysis methods, adapted to the particularities of the study area and available data. Daily and hourly time series of air temperature, precipitation, water temperature, and discharge are analyzed to find trends, change points, inter-annual, seasonal, and sub-daily variations, durations, time shifts, and linear dependencies. The results obtained provide information on the effects of climate change, the duration of diffuse, conduit, and mixed flow, the importance of groundwater exchange, retention times, heat transfer times, and reference water temperatures. It determined the role of the operational mode of the Orlovac HP in discharge from the spring, in inter-annual and sub-annual water redistribution, and in hydropeaking and thermopeaking. The obtained information defines the present state of the Ruda River hydrology and illustrates alterations.
