Results 91 to 100 of about 130,543 (268)

Association between depression, sleep disturbance, and irregular menstrual cycles: insights from the NHANES 2005–2018

BMC Women's Health
Introduction This paper examines the connection among sleep disturbances, depressive symptoms, and menstrual cycle irregularities. Given the high prevalence of sleep disturbances and depression among women of reproductive age, understanding their impact ...
Keke Qin, Dong Liu, Yong Yu, Zhiyu Dong, Yitong Sun   +4 more
doaj   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam, Anthony Siming Chen, Guido Herrmann   +2 more
wiley   +1 more source

Observer‐Based Adaptive Event‐Triggered Tracking Control for Fuzzy TS Systems With Premise Mismatch

International Journal of Adaptive Control and Signal Processing, EarlyView.
This paper presents an adaptive logistic event‐triggered observer‐based tracking controller for Takagi‐Sugeno fuzzy systems under constrained inputs and network delays. Leveraging a hybrid LMI and Secretary Bird Optimization approach, this strategy significantly minimizes communication overhead and computational burden while ensuring optimal reference ...
Oussama Djadane, Salama Makni, Mourad Kchaou, Ahmed El Hajjaji   +3 more
wiley   +1 more source

Open Source Intelligence (OSINT) and the fog of war at the strategic level: Defence industrial production in Russia

European Journal of International Security
The war in Ukraine has increased attention to Open Source Intelligence (OSINT), though most research focuses on tactical use or effects on public opinion.
Oldřich Krpec, Martin Chovančík, Adriana Ilavská   +2 more
doaj   +1 more source

The pre-political and the political in Aristotle’s politics

, 2013
Straipsnyje teigiama, kad ikipolitiškumo ir politiškumo skirtis, išreikšta valstybės ir namų ūkio sąvokomis, yra esminga suvokiant Aristotelio bendruomeninius projektus. Mąstymas šia skirtimi atskleidžia tokių bendruomeninių projektų struktūrą ir principus bei pašalina įtampas, glūdinčias skirtinguose ir dažnai nesuderinamuose Aristotelio teiginiuose ...
openaire   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Does the growth of religious minorities transform electoral politics? Evidence from the evangelical boom in Brazil

Political Science Research and Methods
Christian evangelicals now represent a significant share of the global population. Notably, they are expected to soon outnumber Roman Catholics in several low- and middle-income countries.
Victor Araújo
doaj   +1 more source

A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions

Advanced Engineering Materials, EarlyView.
This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice, Krzysztof S. Stopka, Michael D. Sangid   +2 more
wiley   +1 more source

Renewable energy as a connecting spot between China and Central and Eastern European countries: status, directions and perspectives

Energy, Sustainability and Society
Background Considering energy- and climate-related policies adopted, the European Union and the People’s Republic of China are expected to be on the same trajectory of reducing pollution, aiming for carbon neutrality in 2050 and 2060, respectively ...
Nevena Šekarić Stojanović, Katarina Zakić   +1 more
doaj   +1 more source

Variable Stiffness Flexure Structures Enabled by Phase‐Change Gallium and Adhesive Interfacial Locking for Soft Robotic Applications

Advanced Engineering Materials, EarlyView.
A flexure‐based variable stiffness structure is developed by integrating phase‐change modulation and adhesive interfacial locking of gallium. The design enables a wide stiffness variability, transitioning from soft, flexible behavior to rigid, load‐supporting performance.
Sungjin Kim, Sohee John Yoon, Yong‐Lae Park   +2 more
wiley   +1 more source