Results 91 to 100 of about 2,868 (215)

Systematic analysis on the energy loss in pump-turbines

Advances in Mechanical Engineering
The pump-turbine is a key component in pumped-storage power stations, operating under complex conditions. RANS (Reynolds-Averaged Navier-Stokes) is commonly used for numerical simulations, but the differences among various RANS models under different ...
Miao Guo, Zhiheng Wang, Yan Shen, Ruixiang Song, Xuelin Tang, Xiaoqin Li   +5 more
doaj   +1 more source

Psychological responses to interval and continuous exercise in people living with HIV: A single‐blind, counterbalanced, crossover study

HIV Medicine, EarlyView.
Abstract Aim This study compared acute psychological responses to a single session of low‐volume high‐intensity interval exercise (HIIE‐LV), high‐volume high‐intensity interval exercise (HIIE‐HV), and moderate‐intensity continuous exercise (MICE) in people living with HIV, and healthy controls using a randomized, counterbalanced crossover design ...
Phelipe Wilde, Victor S. de Queiros, Jason R. Jaggers, Angelo Sabag, Júlio M. Alves, Elaine Fernandes, Roberto F. C. Rocha, Paulo F. de Almeida‐Neto, Ronaldo Vagner Thomatieli‐Santos, Paulo Moreira Silva Dantas   +9 more
wiley   +1 more source

Simulation model for Francis and Reversible Pump Turbines

International Journal of Fluid Machinery and Systems, 2015
When simulating the dynamic behaviour of a hydro power plant, it is essential to have a good representation of the turbine behaviour. The pressure transients in the system occurs because the flow changes, which the turbine defines. The flow through the turbine is a function of the pressure, the speed of rotation and the wicket gate opening and is, most
openaire   +2 more sources

Dynamic Capabilities as Drivers of Circular Business Models: Exploring Direct and Indirect Relationships

Journal of Product Innovation Management, EarlyView.
ABSTRACT Academic Summary Despite the urgent need for a circular economy, firms' transition from linear to circular business models (CBMs) remains slow. While previous research suggests that dynamic capabilities are the key drivers of this transition, it assumes a direct link, overlooking that these capabilities can facilitate change but do not ...
Jörn Block, Thomas Clauss, Matheus Franco, Timo Lemcke, Hubert Speth   +4 more
wiley   +1 more source

Influence of Chronotype on Cycling Performance in Simulated 20‐km Time Trials—A Pilot Study

Journal of Sleep Research, EarlyView.
Evening‐type athletes show improved cycling performance later in the day, whilst morning types peak earlier. These differences appear linked to variations in mental readiness and sleepiness, highlighting the importance of considering chronotype in performance planning.
Sabrina Forster, Sascha Schwindling, Chris Abbiss, Fabienne Döringer, Andreas Klütsch, Anne Hecksteden, Tim Meyer   +6 more
wiley   +1 more source

Export controls and the energy transition: Aligning security and sustainability

Review of European, Comparative &International Environmental Law, EarlyView.
Abstract This article examines how the accelerating use of export controls, once motivated by narrow security interests, can now affect the pace and success of the global energy transition. As strategic rivalry intensifies among the US, the EU and China, export controls increasingly target access to critical and emerging technologies such as advanced ...
Olga Hrynkiv
wiley   +1 more source

Review of Water Supply, Treatment and Distribution: Overcoming Challenges for Sustainable Management

Water and Environment Journal, EarlyView.
ABSTRACT Water management faces increasing challenges driven by population growth, accelerated urbanization and climate change, demanding integrated and sustainable approaches to ensure the preservation of water resources. Water scarcity and rising demand intensify the vulnerability of various regions, threatening both water supply and environmental ...
André Linneo Tocchetto, Heloisa Serafim Kuakoski, Fernando Henrique Lermen, Sandro Deretti, Murillo Vetroni Barros, Gustavo de Souza Matias   +5 more
wiley   +1 more source

End Suction Centrifugal Pump Operating in Turbine Mode for Microhydro Applications

Advances in Mechanical Engineering, 2014
This paper reviews the current research works on the end suction centrifugal pump coupled with induction generator running in turbine mode for microhydro application. The information can be used by practicing engineers, researchers, and plant managers to
Mohd Azlan Ismail, Al Khalid Othman, Shahidul Islam, Hushairi Zen   +3 more
doaj   +1 more source

How do physiological networks respond to normobaric hypoxia and isometric exercise?

Experimental Physiology, EarlyView.
Abstract The dynamics of physiological systems are impacted by both exercise and hypoxia. Network models can be used to map the interactions between various physiological components in environmental physiology and exercise using the concepts of information theory.
Danilo Bondi, Cecilia Morandotti, Salvatore Annarumma, Carmen Santangelo, Tiziana Pietrangelo, Stefania Fulle, Vittore Verratti   +6 more
wiley   +1 more source

Effect of hypoxia on muscle activation at equivalent absolute and relative intensity during incremental and constant load exercise to task failure

Experimental Physiology, EarlyView.
Abstract We examined the impact of moderate hypoxia (HYPO) on muscle activation during incremental exercise matched for both absolute and equivalent relative intensity. Fifteen active subjects (10 males, 5 females) completed two ramp incremental test and two step tests in normoxia (NORM; FiO2${F_{{\mathrm{i}}{{\mathrm{O}}_2}}}$ = 0.209) and HYPO (FiO2${
Dania Ibrahim, Youmna Elsayed Hassanein, Nathan E. Townsend   +2 more
wiley   +1 more source