Search

Self-efficacy, perceived social support, and resilience in caregivers of first-stroke patients are closely related, while the interaction mechanism remains unclear. This research explores the mediation effect of self-efficacy in the relationship between perceived social support and resilience in caregivers of first-stroke patients in China. Convenience sampling was designed and used to recruit participants from the General Hospital of Northern Theater in Shenyang, Liaoning Province, China, from February to October 2022, in which 207 self-reported participants completed the Connor-Davidson Resilience Scale (CD-RISC), Multidimensional Scale of Perceived Social Support (MSPSS) and General Self Efficacy Scale (GSES). In addition, the mediation effect of self-efficacy between perceived social support and resilience was determined by the PROCESS macro for SPSS. Among the 207 caregivers of patients with first-stroke, the mean CD-RISC, MSPPS and GSES scores were (72.17 ± 11.28), (71.17 ± 8.99), and (29.64 ± 5.03) respectively. Caregivers' self-efficacy was positively correlated with perceived social support (r = 0.439, p < 0.01) and resilience (r = 0.730, p < 0.01). Self-efficacy served a mediation function partially between perceived social support and resilience, whose effect accounted for 52.90% of the total. Both simple and mediation roles of perceived social support and self-efficacy are established in the relationship of resilience among caregivers of first-stroke patients. Positive social support and self-efficacy are two important targets for future interventional studies, and interventions on them may synergistically improve resilience. Hence, the nurses and community workers should correctly evaluate social support and self-efficacy, confirm the health education requirements, and implement counseling intervention to protect and improve the health of first-stroke patients and their families. [ABSTRACT FROM AUTHOR]

Conventional lithium‐ion batteries (LIBs) with liquid electrolytes are challenged by their big safety concerns, particularly used in electric vehicles. All‐solid‐state batteries using solid‐state electrolytes have been proposed to significantly improve safety yet are impeded by poor interfacial solid–solid contact and fast interface degradation. As a compromising strategy, in situ solidification has been proposed in recent years to fabricate quasi‐solid‐state batteries, which have great advantages in constructing intimate interfaces and cost‐effective mass manufacturing. In this work, quasi‐solid‐state pouch cells with high loading electrodes (≥3 mAh cm−2) were fabricated via in situ solidification of poly(ethylene glycol)diacrylate‐based polymer electrolytes (PEGDA‐PEs). Both single‐layer and multilayer quasi‐solid‐state pouch cells (2.0 Ah) have demonstrated stable electrochemical performance over 500 cycles. The superb electrochemical stability is closely related to the formation of robust and compatible interphase, which successfully inhibits interfacial side reactions and prevents interfacial structural degradation. This work demonstrates that in situ solidification is a facile and cost‐effective approach to fabricate quasi‐solid‐state pouch cells with both excellent electrochemical performance and safety. [ABSTRACT FROM AUTHOR]

The m-SiOx/Si composite for lithium ion battery anode was prepared via a partial reduction reaction between ball-milled silicon monoxide and magnesium by high-energy mechanical milling. The m-SiOx/Si is composed of Si-suboxide and embedded Si nano-crystallites. The particles were further covered by a uniform carbon layer on the surface via a chemical vapor deposition process. The m-SiOx/Si/C composite shows a stable reversible capacity of ca. 1250 mA h g−1 and excellent cycling stability with 90.9% capacity retention on the 100th cycle versus the 6th one (compared at the same current rate). In contrast, SiO pre-milled for 25 h presents a reversible capacity of only ca. 900 mA h g−1 under the same carbon coating condition. [ABSTRACT FROM AUTHOR]

Solid electrolytes are considered as strong alternatives for conventional liquid electrolytes to overcome the safety issues of next-generation high-energy-density lithium metal batteries (LMBs). Although Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) has satisfied ionic conductivity at room temperature (∼10 -4 S cm -1 ), high stability in air, and can be easily sintered, it still suffers from instability of the lithium metal. Moreover, the large interfacial resistance between solid electrolytes and solid electrodes and the stress generated by the volumetric change of lithium metal anodes during cycling would deteriorate the performance of LMBs. Here, we report an effective solution to overcome the abovementioned problems by introducing a three-dimensional gel polymer electrolyte at the interface between LAGP pellets and lithium metal anodes, achieving stable cycling of LiFePO 4 //Li cells at room temperature for 300 cycles. Besides, the degeneration mechanisms of the interfaces of LAGP pellets under different conditions are compared, and peculiar properties different from their counterparts were found.

Maximum a Posteriori (MAP) method has been widely applied to the ill-posed problem of image reconstruction. The choice of prior is the crucial point on MAP methods. However, the most conventional priors will lead to a blurring of the whole image or cause ladder-like artifacts. We therefore proposed a Tsallis entropy-based prior for positron emission tomography (PET) iterative reconstruction in MAP framework. The method uses a Tsallis entropy-based prior to eliminate the uncertainty between prior information and the estimated images. We tested this method in the phantom image, compared it with the traditional prior methods. the results showed that the proposed algorithm could suppress noise and obtain better reconstructed image quality.

In the end of last century, there was a leap in the technological quality of radiotherapy, which is incarnated in three new technologies: Stereotactic radiation surgery (SRS), three-dimensional conformal radiation therapy (3D-CRT) and intensity modulated radiation therapy (IMRT). However, the achievement of these technologies has a close relationship with the precise orientation of tumour. Especially, in terms of body stereotactic precise radiation therapy, its body mechanical orientation system is the kernel to guarantee the accuracy of radiotherapy. This paper presents a novel mechanical orientation system for body precise radiotherapy. It is characterized by flexible adjustment, deft removal, easy disassembly and accurate orientation using apart structure to substitute old integer structure and adopting single segment Z shape orientation marker staff. The new mechanical orientation system guarantees the effect of tumour radiotherapy, which is worthy to be recommended for clinical use.