Model Design on Emergency Power Supply of Electric Vehicle

According to the mobile storage characteristic of electric vehicles, an emergency power supply model about the electric vehicles is presented through analyzing its storage characteristic. The model can ensure important consumer loss minimization during power failure or emergency and can make electric vehicles cost minimization about running, scheduling, and vindicating. In view of the random dispersion feature in one area, an emergency power supply scheme using the electric vehicles is designed based on the K-means algorithm. The purpose is to improve the electric vehicles initiative gathering ability and reduce the electric vehicles gathering time. The study can reduce the number of other emergency power supply equipment and improve the urban electricity reliability

Studies of commutation failures in Hybrid LCC/MMC HVDC systems

A hybrid of line commutated converters(LCCs) and modular multi-level converters(MMCs) can provide the advantages of both the technologies. However, the commutation failure still exists if the LCC operates as an inverter in a hybrid LCC/MMC system. In this paper, the system behavior during a commutation failure is investigated. Both halfbridge and full-bridge MMCs are considered. Control strategies are examined through simulations conducted in PSCAD/EMTDC

Effects of Combining Physical and Cognitive Training on Older Adults’ Physical Performance and Functional Abilities: A Systematic Review

Background: The combination of physical and cognitive training effectively enhances the physical function of the elderly by preventing and reducing the incidence of falls as well as increasing independence in daily activities. However, the optimal combination of strategies to achieve the best physical performance and functional capacity in healthy elderly is still being explored. Objective: This study aimed to explore effective combinations to improve physical function. Methods: A comprehensive database search was done through Web of Science, Medline, Embase and PubMed, and was supplemented with Google scholar since September 2022. Titles and abstracts were used to search for keywords, and data were extracted using the Participants; Interventions; Comparisons, and Outcomes (PICO). Results: The 23 included studies recruited subjects aged 65 and older, comprising 872 females and 497 males, while some research did not identify the gender of 216 participants. Among the included studies, 16 were of high quality while 7 were of low quality. Ten studies showed a significant improvement in gait among older adults who underwent combined physical-cognitive training, while two studies found no positive effect on dual-task gait performance. All five studies showed a significant improvement in strength. Out of the four studies conducted, only one showed no improvement in endurance. All five studies showed improved mobility, while only one study found no effect on agility. However, eight out of the eleven papers showed a significant improvement in balance for older adults who underwent combined cognitive and physical training. The three papers that effectively reduced the fear of falling were also significant. Two studies showed that those who received combined training exhibited a significantly better quality of life compared to those who did not. Conclusion: Combined motor-cognitive training is an advanced, feasible and effective method that can promote the improvement of gait, balance and overall health in the elderly. This type of training has a more significant impact on the elderly’s fall response compared to general physical or cognitive training. Additionally, it contributes to promoting functional independence

Green synthesis of biogenetic Te(0) nanoparticles by high tellurite tolerance fungus Mortierella sp. AB1 with antibacterial activity

Tellurite [Te(IV)] is a high-toxicity metalloid. In this study, a fungus with high Te(IV) resistance was isolated. Strain AB1 could efficiently reduce highly toxic Te(IV) to less toxic Te(0). The reduced products formed rod-shaped biogenetic Te(0) nanoparticles (Bio-TeNPs) intracellularly. Further TEM-element mapping, FTIR, and XPS analysis showed that the extracted Bio-TeNPs ranged from 100 to 500 nm and consisted of Te(0), proteins, lipids, aromatic compounds, and carbohydrates. Moreover, Bio-TeNPs exhibited excellent antibacterial ability against Shigella dysenteriae, Escherichia coli, Enterobacter sakazakii, and Salmonella typhimurium according to inhibition zone tests. Further growth and live/dead staining experiments showed that E. coli and S. typhimurium were significantly inhibited by Bio-TeNPs, and cells were broken or shriveled after treatment with Bio-TeNPs based on SEM observation. Additionally, the antioxidant and cytotoxicity tests showed that the Bio-TeNPs exhibited excellent antioxidant capacity with no cytotoxicity. All these results suggested that strain AB1 showed great potential in bioremediation and Bio-TeNPs were excellent antibacterial nanomaterials with no cytotoxicity.Peer reviewe