Alex Segura^*, Joaquim Meléndez

CMES-Computer Modeling in Engineering & Sciences, Vol.145, No.1, pp. 649-672, 2025, DOI:10.32604/cmes.2025.070954 - 30 October 2025

Abstract The increasing use of renewable energy sources, combined with the increase in electricity demand, has highlighted the importance of energy flexibility management in electrical grids. Energy flexibility is the capacity that generators and consumers have to change production and/or consumption to support grid operation, ensuring the stability and efficiency of the grid. Thus, Local Flexibility Markets (LFMs) are market-oriented mechanisms operated at different time horizons that support flexibility provision and trading at the distribution level, where the Distribution System Operators (DSOs) are the flexibility-demanding actors, and prosumers are the flexibility providers. This paper investigates the… More >

Miao Wang¹, Menglin Zhao¹, Dangyang Ma¹, Xinyu Ji¹, Donghe Li², Zhansheng Xu^1,3,4,*

International Journal of Mental Health Promotion, Vol.27, No.8, pp. 1165-1180, 2025, DOI:10.32604/ijmhp.2025.067133 - 29 August 2025

Abstract Background: With the proliferation of smartphones, adolescent mobile phone dependency has intensified, potentially precipitating academic burnout and other adverse outcomes among students. Contemporary study mostly examines college populations, resulting in a lack of exploration on the internal mechanisms connecting mobile phone dependency to academic burnout. In addition to analysing the chain-mediated effects of sleep quality and cognitive flexibility, this study sought to provide theoretical insights for prevention by applying the Conservation of Resources theory to examine the relationship between academic burnout and mobile phone dependency among middle and high school students. Methods: A cluster convenience… More >

Chris T. G. Jacobs^1,*, Cobus Gerber¹, Xander van Lill^2,3, Rinet van Lill⁴

Journal of Psychology in Africa, Vol.35, No.4, pp. 441-450, 2025, DOI:10.32604/jpa.2025.067167 - 17 August 2025

Abstract This study aimed to confirm the hierarchical factor structure and the criterion validity of the Brief Mental Flexibility Questionnaire (BMFQ) in the South African context. Three hundred and eighty-five employees from a public institution in South Africa participated in the study. Confirmatory factor analysis affirmed the structural validity of the measure, comprising a general factor of mental flexibility and six distinct processes consistent with acceptance and commitment therapy (ACT): cognitive, affective, perceptual, attentional, motivational, and behavioral flexibility. Multiple regression analysis revealed differential predictive weights of these dimensions for general mental health, with cognitive flexibility as More >

Mingjie Huang^1,*, Yaping Pan², Jing Shen¹

Journal of Psychology in Africa, Vol.35, No.3, pp. 369-376, 2025, DOI:10.32604/jpa.2025.068057 - 31 July 2025

Abstract The present study examined the role of emotional balance and the moderating role of rumination in the relationship between psychological inflexibility and sleep quality among college students. Participants were 837 Chinese college students (females = 52%, mean age = 18.89, SD = 0.93 years). They completed the Multidimensional Psychological Inflexibility Scale (MPIS), Affect Balance Scale (ABS), Ruminative Response Scale (RRS), Pittsburgh Sleep Quality Index (PSQI). We utilized moderated-mediation analysis to explore the mechanism of action among variables. Emotional balance mediated the relationship between psychological inflexibility and sleep quality, and rumination moderated the direct effect of… More >

Cuiping Li¹, Jiacheng Sun¹, Qiang Li², Qi Guo², Junhui Li^1,*, Shuo Yu², Jingbo Wang², Wenze Li²

Energy Engineering, Vol.122, No.8, pp. 3055-3077, 2025, DOI:10.32604/ee.2025.064440 - 24 July 2025

Abstract The penetration rate of new wind and photovoltaic energy in the power system has increased significantly, and the dramatic fluctuation of the net load of the grid has led to a severe lack of flexibility in the regional grid. This paper proposes a hierarchical optimal dispatch strategy for a high proportion of new energy power systems that considers the balanced response of grid flexibility. Firstly, various flexibility resource regulation capabilities on the source-load side are analyzed, and then flexibility demand and flexibility response are matched, and flexibility demand response assessment is proposed; then, a hierarchical… More >

Shanshan Xu¹, Liang Hu^1,2,*

International Journal of Mental Health Promotion, Vol.27, No.6, pp. 771-785, 2025, DOI:10.32604/ijmhp.2025.064984 - 30 June 2025

Abstract Background: The Canadian 24-h movement guidelines (24-HMG) emphasize the holistic consideration of physical activity (PA), sedentary behavior, and sleep in shaping health outcomes. This study aimed to examine the associations between meeting 24-HMG and emotion regulation-related indicators among children and adolescents. Methods: A total of 534 Chinese children and adolescents aged 12.94 ± 1.10 years (49.81% males) participated in this study and completed self-report measures assessing 24-h movement behaviors, emotion regulation strategies, emotion regulation flexibility, and regulatory emotional self-efficacy. Results: Only 7.12% of the participants adhered to two or all three guidelines. The number of guidelines More >

Haiyan Hu, Shuanghu Fang^*, Qilin Zheng, Dongyan Ding

International Journal of Mental Health Promotion, Vol.27, No.1, pp. 65-76, 2025, DOI:10.32604/ijmhp.2024.059324 - 31 January 2025

Abstract Objectives: This study aimed to assess the reliability and validity of the abbreviated Committed Action Questionnaire (CAQ-8) in a cohort of 1635 Chinese university students. Methods: Participants completed the Chinese version of the CAQ-8 along with other standardized measures, including the Acceptance and Action Questionnaire-II (AAQ-II), the Valuing Questionnaire (VQ), the Satisfaction with Life Scale (SWLS), the Depression Anxiety Stress Scales (DASS-21), and the World Health Organization Five-item Well-Being Index (WHO-5). A retest was conducted one month later with 300 valid responses. Results: Exploratory factor analysis (n = 818) identified a 2-factor structure, confirmed through validated… More >

Santiago Bañales^1,2,*, Raquel Dormido¹, Natividad Duro¹

CMES-Computer Modeling in Engineering & Sciences, Vol.142, No.1, pp. 869-907, 2025, DOI:10.32604/cmes.2024.054946 - 17 December 2024

Abstract Customer segmentation according to load-shape profiles using smart meter data is an increasingly important application to vital the planning and operation of energy systems and to enable citizens’ participation in the energy transition. This study proposes an innovative multi-step clustering procedure to segment customers based on load-shape patterns at the daily and intra-daily time horizons. Smart meter data is split between daily and hourly normalized time series to assess monthly, weekly, daily, and hourly seasonality patterns separately. The dimensionality reduction implicit in the splitting allows a direct approach to clustering raw daily energy time series… More > Graphic Abstract

Weigang Jin¹, Lei Chen^2,*, Shencong Zheng², Yuqi Jiang², Yifei Li², Hongkun Chen²

Energy Engineering, Vol.121, No.11, pp. 3161-3179, 2024, DOI:10.32604/ee.2024.054068 - 21 October 2024

Abstract Investigating flexibility and stability boosting transmission expansion planning (TEP) methods can increase the renewable energy (RE) consumption of the power systems. In this study, we propose a bi-level TEP method for voltage-source-converter-based direct current (VSC-DC), focusing on flexibility and stability enhancement. First, we established the TEP framework of VSC-DC, by introducing the evaluation indices to quantify the power system flexibility and stability. Subsequently, we propose a bi-level VSC-DC TEP model: the upper-level model acquires the optimal VSC-DC planning scheme by using the improved moth flame optimization (IMFO) algorithm, and the lower-level model evaluates the flexibility More >

Aljuaid Turkea Ayedh M^1,2,*, Ainuddin Wahid Abdul Wahab^1,*, Mohd Yamani Idna Idris^1,3

CMC-Computers, Materials & Continua, Vol.80, No.3, pp. 4663-4686, 2024, DOI:10.32604/cmc.2024.055287 - 12 September 2024

Abstract Organizations are adopting the Bring Your Own Device (BYOD) concept to enhance productivity and reduce expenses. However, this trend introduces security challenges, such as unauthorized access. Traditional access control systems, such as Attribute-Based Access Control (ABAC) and Role-Based Access Control (RBAC), are limited in their ability to enforce access decisions due to the variability and dynamism of attributes related to users and resources. This paper proposes a method for enforcing access decisions that is adaptable and dynamic, based on multilayer hybrid deep learning techniques, particularly the Tabular Deep Neural Network TabularDNN method. This technique transforms… More >