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Suppressing solvent adducts via coordination competition enables scalable perovskite photovoltaics
Three-dimensional printed neonatal cannulation phantom for ultrasound-guided vascular access training
Breaking the oxo-wall for Co(IV)-oxo species and their nanoconfined catalytic performance within Ce-Co lamellar membrane
Compact integrated self-multiplexing antenna for sub-6 GHz and millimeter wave 5G frequency spectrum
Abstract This paper presents a compact integrated self-multiplexing antenna capable of operating across both the sub-6 GHz and millimeter-wave bands of the 5G frequency spectrum. The sub-6 GHz unit elements are alternately arranged with different structural dimensions to achieve eight distinct operating frequencies within the sub-6 GHz spectrum. Between each pair of sub-6 GHz unit elements, millimeter-wave unit elements of varying dimensions are incorporated to generate radiations at eight distinct frequencies in the millimeter-wave band. The first eight ports (P 1 –P 8 ) operate at eight distinct frequencies of sub-6 GHz spectrum, whereas the remaining eight ports (P 9 –P 16 ) are designed to radiate at eight distinct millimeter-wave frequencies. Electromagnetic waves in the sub-6 GHz spectrum are obtained by means of exciting TE 110 mode in the modified eighth-mode substrate integrated waveguide (EMSIW) cavity resonators, while millimeter-wave radiation is achieved through the hybrid TE 730 and TE 750 modes of the EMSIW cavity resonators. The inter-port isolations better than 40 dB and 20 dB are obtained across the sub-6 GHz and millimeter-wave spectrum, respectively. This integrated placement of millimeter-wave elements efficiently utilizes the available substrate area while maintaining high inter-port isolation across the entire frequency spectrum. The design antenna system has an overall footprint of 0.425 $$\:{\varvec{\lambda\:}}_{\varvec{g}}^{2}$$ , where $$\:{\varvec{\lambda\:}}_{\varvec{g}}$$ corresponds to the guided wavelength at the lowest operating frequency. Owing to its compact dimensions, simple integrated design and excellent performance, the proposed self-multiplexing antenna emerges as a promising candidate for multiband communication systems operating in sub-6 GHz and millimeter-wave 5G spectrum.
Taming of Low‐Valent Arsenic Compounds and Transfer of Nascent As <sub>2</sub> Facilitated by a Frustrated Lewis Pair
Abstract The first examples of frustrated Lewis pair (FLP)‐stabilized compounds with formal oxidation states of arsenic ranging from −1 to +1 have been synthesized. These chelates include the metalated arsinidenyl As(─I) anion in FLP{As─K} ( 1 ), which provides access to the parent FLP‐stabilized arsinidene, As(+I)─H, in FLP{As─H} ( 3 ), and a diatomic arsenic(0) allotrope within FLP{As─As}FLP ( 5 ). Irradiation of the As 2 complex 5 represents an unprecedented method for the generation of nascent diarsenic, As 2 nasc , which shows triple‐bond like reactivity with a diene and selective As 2 unit insertion into metal‐metal bonds under mild conditions.
Quantum boomerang effect of light
AI anxiety and adoption intention in higher education based on an extended TAM-UTAUT and PLS-SEM analysis
Environmental enrichment and physical exercise prevent stress-induced social avoidance and blood-brain barrier alterations via Fgf2
Abstract Chronic stress promotes blood-brain barrier (BBB) integrity loss leading to passage of inflammatory mediators in mood-regulating brain areas and establishment of depressive behaviors. Conversely, neurovascular adaptations favoring stress resilience and preventive strategies to promote them are undetermined. We report that environmental enrichment dampens stress-induced loss of endothelial tight junction Claudin-5 (Cldn5) along with anxiety- and depression-like behaviors in male mice via an increase in fibroblast growth factor 2 (Fgf2). Coping with voluntary physical exercise also protects the BBB from stress deleterious effects by increasing Fgf2. Fgf2 is mostly expressed by glial cells, and viral-mediated astrocyte-specific Fgf2 upregulation prevents stress-induced social avoidance while downregulation increases stress susceptibility and blunts physical exercise benefits. Treatment of mouse and human endothelial cells with Fgf2 prior an immune challenge reduces BBB dysfunction, Cldn5 loss, and altered signaling supporting its protective role. Circulating FGF2 level is linked with depression severity and symptomatology in men and women reinforcing involvement of this growth factor in mood disorders.
Research on scheduling optimization of ship plate processing workshop based on improved NSGA-II algorithm
Correction to “Facile Energy Release from Substituted Dewar Isomers of 1,2‐Dihydro‐1,2‐Azaborinines Catalyzed by Coinage Metal Lewis Acids”
Spatiotemporally ordered topological transformation in layered double hydroxides enables synergistic mineralization of AsIII/Cd2+
A modified Dung Beetle optimizer for combined heat and power economic dispatch considering power losses, valve-point effects, and operating constraints
Abstract The Combined Heat and Power Economic Dispatch (CHPED) problem represents a significant optimization challenge in modern power systems due to its inherent complexity arising from multiple operational constraints. This complexity is further exacerbated when considering the effect of power losses (PLs), valve-point loading effect (VPLE), and prohibited operating zones (POZs). Consequently, an efficient and robust optimization algorithm is essential for obtaining a globally optimal solution while satisfying all constraints. To address these challenges, this work evaluates the effectiveness of the Modified Dung Beetle Optimizer (MDBO) for solving the CHPED problem, considering PLs, VPLE, and POZs. The MDBO enhances the search process and mitigates the limitations of the conventional Dung Beetle Optimizer, particularly stagnation and premature convergence to local optima. The novelty in this paper is proposing a modified version of the traditional DBO (MDBO) by integrating three improvement strategies, including the fitness distance balance (FDB), Chaotic mutation (CM), and adaptive local search approach (ALSA), to solve the CHPED problem. The proposed MDBO has the ability to overcome the shortcomings of traditional DBO, such as its premature convergence and tendency to local optima. The effectiveness of the proposed MDBO has been evaluated on CHPED problems involving 4-unit, 7-unit, 24-unit, and 48-unit systems under various operating conditions. Moreover, MDBO performance has been rigorously assessed using standard benchmark test suites, including CEC-2019. The results demonstrate a significant reduction in operating costs, confirming the superior performance of the MDBO in comparison to existing optimization techniques like Sand Cat Swarm Optimizer (SCSO), African vultures optimization algorithm (AVOA), Sine Cosine Algorithm (SCA), Harris Hawks Optimization (HHO), Grey Wolf Optimizer (GWO), Liver cancer algorithm (LCA), Zebra Optimizer Algorithm (ZOA), and Whale Optimization Algorithm (WOA). Furthermore, the proposed algorithm consistently outperforms alternative methods reported in the literature, offering a more efficient and reliable solution for CHPED optimization.
The cotranslational cycle of the ribosome-bound Hsp70 homolog Ssb
Abstract Coupling of ribosomal translation with cotranslational protein folding is essential for cellular homeostasis. In eukaryotes, Hsp70 and its J-domain cochaperone, the heterodimeric ribosome-associated complex (RAC), are central to this process; however, mechanistic insights into the coordination of Hsp70 function with translation remain limited. Here, we present two cryo-EM structures of the ribosome-bound yeast Hsp70 Ssb, identifying Rpl25/uL23 as the ribosomal binding site and revealing its interaction with a model nascent chain. Together with detailed biochemical and mutational analyses, these structures enable us to delineate the intricate RAC-dependent cycle, which positions the substrate binding domain of Ssb-ATP close to the tunnel exit to receive nascent chains. This arrangement allows Ssb to undergo substantial conformational changes upon ATP hydrolysis without steric clashes with the ribosome, while the substrate binding domain of Ssb, now anchored by the tightly bound nascent chain, remains close to the tunnel exit.
AI and AR based digital reconstruction of Liangshan Yi lacquerware
Mechanism of trans-envelope bacterial polysaccharide secretion in Class-3 outer-membrane polysaccharide export (OPX) protein systems
Physicochemical characterization, antioxidant capacity, and antimicrobial activity of Citrullus colocynthis seed oil
Optimal murine CD4+ T cell priming by mRNA-lipid nanoparticle vaccines requires endogenous antigen processing
Need for cognitive closure predicts preference for similar others and reduced diversity in social networks
Abstract People vary in their tolerance for uncertainty, and this motivation—known as Need for Cognitive Closure (NFC)—can shape social behavior. Individuals high in NFC are driven to avoid ambiguity and quickly resolve uncertainty. Because interacting with similar others (homophily) tends to reduce uncertainty, while engaging with dissimilar others (heterophily) can increase it, we examined whether NFC predicts preferences for homophilous over heterophilous interactions. Across four correlational studies and a preregistered experiment, we found that higher NFC was consistently associated with lower heterophily. Meta-analytic results confirmed the robustness of this association across samples. High-NFC individuals also reported fewer acquaintances and fewer people to discuss important matters with. To investigate whether uncertainty reduction motivates these patterns, we experimentally induced uncertainty and assessed participants’ social preferences. As predicted, uncertainty reduced interest in interacting with dissimilar others, especially among individuals high in NFC. These findings suggest that a fundamental motivation to reduce uncertainty influences the diversity and composition of people’s social networks. This has broader implications for social support, the construction of shared realities, and the persistence of group-based stereotypes.