Electrospun PVDF-TrFE/MXene Nanofiber Mat-Based Triboelectric Nanogenerator for Smart Home Appliances.

Understanding of the triboelectric charge accumulation from the view of microcapacitor formation plays a critical role in boosting the output performance of the triboelectric nanogenerator (TENG). Here, an electrospun nanofiber-based TENG (EN-TENG) using a poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE)/MXene nanocomposite material with superior dielectric constant and high surface charge density is reported. The influence of dielectric properties on the output performance of the EN-TENG is investigated theoretically and experimentally. The fabricated EN-TENG exhibited a maximum power density of 4.02 W/m2 at a matching external load resistance of 4 MΩ. The PVDF-TrFE/MXene nanocomposite improved the output performance of the EN-TENG fourfold. The EN-TENG successfully powered an electronic stopwatch and thermo-hygrometer by harvesting energy from human finger tapping. Moreover, it was utilized in smart home applications as a self-powered switch for controlling electrical home appliances, including fire alarms, fans, and smart doors. This work presents an effective and innovative approach toward self-powered systems, human-machine interfaces, and smart home applications.

Measurement of the Spectral Shape of the ß-Decay of

We report on a comparison between the theoretically predicted and experimentally measured spectra of the first-forbidden nonunique ß-decay transition ^{137}Xe(7/2^{-})→^{137}Cs(7/2^{+}). The experimental data were acquired by the EXO-200 experiment during a deployment of an AmBe neutron source. The ultralow background environment of EXO-200, together with dedicated source deployment and analysis procedures, allowed for collection of a pure sample of the decays, with an estimated signal to background ratio of more than 99 to 1 in the energy range from 1075 to 4175 keV. In addition to providing a rare and accurate measurement of the first-forbidden nonunique ß-decay shape, this work constitutes a novel test of the calculated electron spectral shapes in the context of the reactor antineutrino anomaly and spectral bump.

Search for Neutrinoless Double-ß Decay with the Complete EXO-200 Dataset.

A search for neutrinoless double-ß decay (0νßß) in ^{136}Xe is performed with the full EXO-200 dataset using a deep neural network to discriminate between 0νßß and background events. Relative to previous analyses, the signal detection efficiency has been raised from 80.8% to 96.4±3.0%, and the energy resolution of the detector at the Q value of ^{136}Xe 0νßß has been improved from σ/E=1.23% to 1.15±0.02% with the upgraded detector. Accounting for the new data, the median 90% confidence level 0νßß half-life sensitivity for this analysis is 5.0×10^{25} yr with a total ^{136}Xe exposure of 234.1 kg yr. No statistically significant evidence for 0νßß is observed, leading to a lower limit on the 0νßß half-life of 3.5×10^{25} yr at the 90% confidence level.

Acculturation, acculturative stress and resilience among older immigrants in United States.

BACKGROUND: Previous studies have demonstrated a strong and consistent association between higher acculturative stress and poorer mental and physical health outcomes while acculturating to a new country. Acculturative stress is multifactorial and nurses work in variety of settings that encounter older immigrants with different levels of acculturative stress. Research on resilience among older immigrants has linked resilience to successful acculturation. PURPOSE: The aim of this study was to explore the interplay between acculturation, acculturative stress and resilience, and their collective impact on physical and mental health self-evaluation among older Filipino Americans. METHOD: This study employed a cross-sectional, quantitative, descriptive design using older Filipino immigrants, 55 years and older (N = 123) who were living in the western part of the United States. FINDINGS: Our study found that the levels of acculturation did not have a significant influence on self-evaluation of physical and mental health; however, acculturative stress and resilience had an indirect effect on physical and mental health. CONCLUSIONS: This study reemphasized the importance of assessing the acculturative stress and determining resiliency among older immigrants who might be undergoing acculturation-based conflicts with their families and community. Promoting a low level of acculturative stress and high resilience is key to shaping interventions to obtain better health outcomes among this population. IMPLICATIONS FOR NURSING POLICY: Nurses can support and augment the efforts of professional nursing organizations to advocate and encourage legislation and policy to improve the physical and mental well-being of older immigrants. Policymakers should focus on additional resources for older adults from other countries to reduce their stress or enhance their resilience.