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Individual stability of single-channel EEG measures over one year in healthy adults
Abstract The clinical applicability of electroencephalography (EEG) relies on the reliability and temporal stability of its measures. While the reliability of linear EEG measures is well established, the long-term stability of both linear and nonlinear measures at the individual level, as well as interindividual variability, remains underexplored. This study evaluated the one-year stability of EEG absolute band powers (theta, alpha, beta, and gamma) and nonlinear measures (Higuchi’s fractal dimension, Lempel–Ziv complexity, detrended fluctuation analysis, and in-phase Matrix Profile) across 12 monthly EEG recordings in nine healthy males aged 26–49. Intraclass correlation coefficients (ICCs) indicated excellent reliability across all measures, although beta power showed slightly reduced ICCs in temporal regions and gamma power demonstrated lower reliability in peripheral sites. At the individual level, nonlinear measures showed greater temporal stability than EEG band powers. Although a few individuals, particularly in band power measures, exhibited annual fluctuations comparable to or exceeding interindividual variability, most participants demonstrated consistent EEG profiles over time. These findings support the use of nonlinear EEG measures in longitudinal research and indicate their potential for developing personalized EEG-based neural biomarkers. They also highlight the importance of estimating expected individual variability when designing individualized monitoring approaches, as high reliability at the group level does not preclude substantial within-subject variability in some cases.
Angle-tuned Gross-Neveu quantum criticality in twisted bilayer graphene
Photometric light curve analysis of three overcontact binary systems: ATO J255.8159+16.8821, CRTS J034336.4+264312, and NSVS 2669503
Abstract Multi-band photometric observations of three contact binaries (ATO J255.8159+16.8821, CRTS J034336.4+264312, and NSVS 2669503) were carried out using the 1.88 m telescope at the Kottamia Astronomical Observatory (KAO) in Egypt. New times of minima for all three systems have been calculated. In particular, for NSVS 2669503, we performed an $$O-C$$ analysis to investigate period variations. The results indicate a decreasing orbital period, with a rate of $$\textrm{d}P/\textrm{d}t \approx 1.85 \times 10^{-10}$$ days yr $$\phantom{0}^{-1}$$ . Analysis using the Wilson-Devinney (W-D) program revealed that all three systems are A-subtype contact binaries with mass ratios (q) of 0.47, 0.34, and 0.28, respectively. The results showed that ATO J255.8159+16.8821 exhibits the O’Connell effect, while the other two systems (CRTS J034336.4+264312 and NSVS 2669503) have a symmetric light curve. The fill-out factors of the systems were determined to be 0.204, 0.157, and 0.069, respectively, indicating all three systems are shallow contact systems. To understand their evolutionary status, mass-luminosity and mass-radius diagrams were plotted. These diagrams indicate that the primary components of the three systems are main sequence stars, whereas the less massive stars have evolved beyond the main sequence. The dynamical evolution of the systems is also discussed.
Dual-mode narrowband organic photodetectors for self-aligned imaging in NIR-I and NIR-II
Molybdenum carbide nanoparticles produced by pulsed laser ablation for efficient hydrogen evolution reaction in alkaline conditions
Skeletal editing of pyridines to aryldialdehydes
A chain mediation model reveals the association between physical exercise and sense of meaning in life in college students
Iron-catalyzed alkyne alkylzincation affected by counterions
Associations of body roundness index and inflammatory marker with hypertension among children and adolescents: a cross-sectional study
Long-lived multilevel coherences and spin-1 dynamics encoded in the rotational states of ultracold molecules
Abstract Rotational states of ultracold polar molecules possess long lifetimes, microwave-domain coupling, and tunable dipolar interactions. The availability of numerous rotational states has inspired many applications, including simulating quantum magnetism, encoding high-dimensional qudits and generating large synthetic dimensions. However, engineering the coherent superpositions of multiple rotational states needed for these applications is difficult owing to strong differential light shifts. Here, we overcome this challenge using individual molecules confined in near-magic wavelength optical tweezers. Through precision Ramsey spectroscopy, we find the exact magic wavelengths and sensitivities to detuning errors for multiple rotational state superpositions. We find for traps polarised parallel to the quantisation axis, the magic wavelengths are closely clustered enabling long-lived coherence across multiple rotational states simultaneously. Using a generalised Ramsey sequence, we demonstrate second-scale coherent spin-1 dynamics encoded in three rotational states and perform multiparameter estimation. With modest experimental improvements, we predict second-scale coherence across ten rotational states is achievable.
Infants’ neural processing of emotional faces after ostracism
Reaction-driven magmatic crystallisation at the Maoniuping carbonatite
Abstract Igneous rocks form by solidification of magmas through cooling or volatile degassing following decompression. Expelled H2O is thought to trigger alteration around intrusions, leading to formation of metasomatic halos. This mechanism is often invoked to explain many magmatic–hydrothermal rock associations, some of them economically mineralised. Maoniuping in China is one of the four largest operating rare earth element (REE) mines globally, whose origin has been attributed to such hydrothermal exsolution. However, no direct evidence links hydrothermal fluids to the formation of Maoniuping and its associated REE mineralisation. Here we show that the REE deposit at Maoniuping formed magmatically from a carbonatitic brine-melt. Textural and chemical evidence reveals extensive interaction with its quartz syenite host, producing albitised fenites. Coupled metasomatism with these fenites led to silica contamination of the carbonatite melt, triggering crystallisation of refractory alkali–ferromagnesian silicates—an antiskarn. This solidified the melt due to removal of the fluxing elements Na and K. Thus, carbonatite melts can crystallise by element assimilation from their environments, precipitating alkali liquid fluxes into solid minerals. Temperature decrease and volatile degassing merely play a secondary role in this igneous rock-forming process. Solidification driven by coupled antiskarnisation and fenitisation affects both the mineral assemblage and ore fabric, and likely operated in most carbonatite-hosted REE deposits elsewhere.
The genetic secrets revealed from canine fetal fluids obtained in mid-pregnancy
Author Correction: In vivo measurement of an Apelin gradient with a genetically encoded APLNR conformation biosensor
An fNIRS hyperscanning study on the influence of team type and sex on athletes’ interpersonal trust and neural mechanisms
Unequal segregation of mitochondria during asymmetric cell division contributes to cell fate divergence in sister cells in vivo
Abstract The unequal segregation of organelles has been proposed to be an intrinsic mechanism that contributes to cell fate divergence during asymmetric cell division; however, in vivo evidence is sparse. Using super-resolution microscopy, we analysed the segregation of organelles during the division of the neuroblast QL.p in C. elegans larvae. QL.p divides to generate a daughter that survives, QL.pa, and a daughter that dies, QL.pp. We found that mitochondria segregate unequally by density and morphology and that this is dependent on mitochondrial dynamics. Furthermore, we found that mitochondrial density in QL.pp correlates with the time it takes QL.pp to die. We propose that low mitochondrial density in QL.pp promotes the cell death fate and ensures that QL.pp dies in a highly reproducible and timely manner. Our results provide in vivo evidence that the unequal segregation of mitochondria can contribute to cell fate divergence during asymmetric cell division in a developing animal.