bluuebunny/crossref_metadata_2025_split huggingface dataset:
Coffee consumption and migraine: a population-based study
Authors: Cho Soomi , Kim Kyung Min , Chu Min Kyung 
Published: March 2024

AbstractAlthough coffee is one of the most consumed caffeinated beverages worldwide, the role of coffee consumption in migraine is controversial. This study examined the relationship between coffee consumption and clinical characteristics in participants with migraine compared to those with non-migraine headache. This cross-sectional study used data from a nationwide survey on headache and sleep. Coffee consumption was classified as no-to-low (< 1 cup/day), moderate (1–2 cups/day), or high (≥ 3 cups/day). Of the 3030 survey participants, 170 (5.6%) and 1,768 (58.3%) were identified as having migraine and non-migraine headache, respectively. Coffee consumption tended to increase in the order of non-headache, non-migraine headache, and migraine (linear-by-linear association, p = 0.011). Although psychiatric comorbidities (depression for migraine and anxiety for non-migraine headache) and stress significantly differed according to coffee consumption, most headache characteristics and accompanying symptoms did not differ among the three groups for participants with migraine and non-migraine headache. Response to acute headache treatment—adjusted for age, sex, depression, anxiety, stress, preventive medication use, and current smoking—was not significantly different by coffee consumption in participants with migraine and non-migraine headache. In conclusion, most headache-related characteristics and acute treatment response did not significantly differ by coffee consumption in migraine and non-migraine headache.
A unidimensional short form of the Beck Hopelessness Scale (BHS-7) derived using item response theory
Authors: Pretorius Tyrone B. , Padmanabhanunni Anita 
Published: March 2024

AbstractThe Beck Hopelessness Scale (BHS) is the most widely used measure of hopelessness, a key psychological construct linked with various mental health outcomes. In clinical settings, the BHS has proven a reliable tool for assessing hopelessness; however, there has been debate regarding the tool’s internal consistency among non-clinical populations. Most studies assessing the dimensionality of the BHS have relied on the use of classical test theory (CTT). The length of the BHS has also prompted concerns over its practicality. The BHS-9 was developed to address these critiques and formulated based on psychiatrically hospitalized adult patients. The current study investigates the dimensionality of the BHS-9 among a non-clinical sample using item response theory (Mokken scale analysis and Rasch) and CTT. The results confirm that the BHS-9 is essentially unidimensional. However, a salient finding was that Item 6 violated invariant item ordering. An exploratory factor analysis of the remaining eight items found that the items accounted for 48.05% of the variance. Further exploratory factor analyses, removing one item at a time, showed that the removal of item 18 would increase variance explained > 50%. The revised BHS-7 was found to be unidimensional and maintained strong internal consistency and criterion-related validity. This revised tool effectively captures the essence of hopelessness among a non-clinical population and presents a more refined option for the assessment of this construct.
Two distinct waves of transcriptome and translatome changes drive Drosophila germline stem cell differentiation
Authors: Samuels Tamsin J , Gui Jinghua , Gebert Daniel , Karam Teixeira Felipe 
Published: March 2024

AbstractThe tight control of fate transitions during stem cell differentiation is essential for proper tissue development and maintenance. However, the challenges in studying sparsely distributed adult stem cells in a systematic manner have hindered efforts to identify how the multilayered regulation of gene expression programs orchestrates stem cell differentiation in vivo. Here, we synchronised Drosophila female germline stem cell (GSC) differentiation in vivo to perform in-depth transcriptome and translatome analyses at high temporal resolution. This characterisation revealed widespread and dynamic changes in mRNA level, promoter usage, exon inclusion, and translation efficiency. Transient expression of the master regulator, Bam, drives a first wave of expression changes, primarily modifying the cell cycle program. Surprisingly, as Bam levels recede, differentiating cells return to a remarkably stem cell-like transcription and translation program, with a few crucial changes feeding into a second phase driving terminal differentiation to form the oocyte. Altogether, these findings reveal that rather than a unidirectional accumulation of changes, the in vivo differentiation of stem cells relies on distinctly regulated and developmentally sequential waves.
Spracherwerb und digitale Medien: Eine Bestandsaufnahme
Authors: Elstrodt-Wefing Nadine , Neitzel Isabel , Ritterfeld Ute 
Published: March 2024

ZusammenfassungFür die sprachförderliche Wirkung von digitalen Medien ist ein Zusammenspiel von Medienformat, Inhalten und Nutzungsverhalten nötig. Zur Bewertung des Sprachförderpotenzials digitaler Medien werden zunächst fünf Kriterien elaboriert, die dann durch Erkenntnisse zum Nutzungsverhalten von Vorschul- und Grundschulkindern ergänzt werden.
Rehospitalization following Discharge from Newborn Nursery during Severe Acute Respiratory Syndrome Coronavirus 2 Pandemic
Authors: Ronca Kristen , Vazquez Laura , Bathory Eleanor , Nafday Suhas 
Published: March 2024

Objective This study aimed to compare rehospitalization rates, diagnoses, and well-baby nursery (WBN) length of stay (LOS) among rehospitalized infants born during the COVID-19 pandemic to those born prior.
Study Design A retrospective comparison of 215 infants rehospitalized from March 1, 2019, to March 1, 2021, was performed in an urban academic center. Rates of readmission were determined for all infants using an unadjusted odds ratio. Among infants rehospitalized at ≤30 and ≤7 days, key cohort characteristics were analyzed using chi-square analysis, Fisher's exact test, independent t-test, and nonparametric testing as applicable. Differences in readmission diagnoses determined by International Classification of Diseases (ICD) code and chart review were evaluated with multivariable logistic regression comparing infants born during the pandemic to the year prior.
Results Pandemic infants had a 51% increased odds of rehospitalization ≤7 days of discharge from WBN compared with prepandemic infants (95% confidence interval [CI]: 1.09–2.09). Rehospitalized infants born during the pandemic had shorter WBN LOS; infants rehospitalized ≤30 days had LOS of 54.3 ± 18.6 versus 59.6 ± 16.2 hours (p = 0.02) and infants rehospitalized ≤7 days had LOS of 53.8 ± 17.8 versus 60.8 ±17.0 hours (p = 0.02). The pandemic group of infants had a 3.5 increased odds of being readmitted for hyperbilirubinemia compared with other diagnoses after adjusting for biological sex, ethnicity, percent weight lost at time of discharge, gestational age, and mode of delivery (CI 1.9, 6.4).
Conclusion Rehospitalization ≤7 days post-WBN discharge was more common in infants born during the pandemic. Infants rehospitalized during the pandemic were more likely to have shorter WBN LOS and to be rehospitalized for hyperbilirubinemia. Retrospective analyses limit conclusions about causation but suggest that being born during the pandemic increased risk of rehospitalization for hyperbilirubinemia among infants in urban, under resourced setting warranting further investigation.
Key Points
Effects of heterogenous wettability on evaporation from a simulated soil pore: Stick-slip evaporative mode and contact line motion
Authors: Pakkebier Jack , Chakraborty Partha P. , Derby Melanie M. 
Published: March 2024

The Ogallala Aquifer, a primary irrigation water source in the High Plains region of the United States, is declining, thereby necessitating new water conservation strategies. This paper investigates the impact of mixed wettability on the evaporation dynamics of a 10-µl sessile water droplet placed within simulated soil pores comprised of hydrophobic Teflon beads (CA ∼ 108°) and hydrophilic glass (CA ∼ 41°) beads with 2.38-mm diameters, where homogeneous and heterogenous (i.e., mixed hydrophobicity and hydrophilicity) wettability configurations were investigated. Experiments were performed in an environmental chamber where the relative humidity and temperature were 60% ± 0.1% RH and 20 ± 0.4 °C, respectively. Wettability influenced evaporation times, with homogeneous hydrophobic pores (i.e., three Teflon beads) and heterogenous one glass, two Teflon pores having the longest average evaporation times of 40 and 39 min, respectively. Homogeneous hydrophilic pores (i.e., three glass beads) and heterogenous two glass, one Teflon pores exhibited evaporation times of 34 min. Evaporation times for heterogenous combinations trended based on the predominant wettability. Contact angles and the projected length of contact were analyzed from videos to capture pinning and depinning during evaporation. For many cases including hydrophobicity, contact angles were less than 90°, and in some configurations, water would be pinned on a Teflon bead, whereas depinning (i.e., moving) on a glass bead. Stick-slip evaporation was observed, where the evaporating droplet switched between constant contact radius and constant contact area evaporative modes to minimize droplet surface energy. The results suggest wettability alterations in agricultural settings may reduce evaporation.
Broadband InBiSe3 alloy photoelectric detector from visible to terahertz
Authors: Chen Hang , Wu Tuntan , Chen Shijie , Zhang Qiyuan , Jiang Lin , Zhou Wei , Gao Yanqing , Yao Niangjuan , Huang Zhiming 
Published: March 2024

With the demand for communication, imaging, spectroscopy, and other applications, broadband detection has always been a particularly popular direction. However, the current photodetectors have the problems of relatively narrow response bands, a low sensitivity, a slow response speed, and complex manufacturing processes. In this article, the alloy material InBiSe3 is proposed to manufacture a wideband photodetector from visible to terahertz at room temperature. The noise equivalent power (NEP) of the detector is 1.37 × 10−10 W Hz−1/2 at 635 nm, 1.2 × 10−10 W Hz−1/2 at 808 nm, and 1.56 × 10−10 W Hz−1/2 at 980 nm. The device also exhibits a good response in the terahertz and millimeter-wave bands, with a NEP of 8.33 × 10−15 W Hz−1/2 at 0.023 THz, 7.03 × 10−14 W Hz−1/2 at 0.14 THz, 6.14 × 10−15 W Hz−1/2 at 0.171 THz, 1.91 × 10−14 W Hz−1/2 at 0.35 THz, and 4.04 × 10−14 W Hz−1/2 at 0.5 THz based on the electromagnetic induced potential wells effect. The response time is as fast as 10 µs. Our results demonstrate the promise of the InBiSe3 alloy for photoelectric applications and provide a method for the high performance of broadband photodetectors.
Final report, ongoing key comparison BIPM.QM-K1, ozone at ambient level, comparison with FMI, March 2023
Authors: Viallon Joële , Idrees Faraz , Moussay Philippe , Wielgosz Robert , Saarnio Karri 
Published: March 2024

Main text
As part of the ongoing key comparison BIPM.QM-K1, a comparison has been performed between the ozone national standard of Finland, maintained by the Finnish Meteorological Institute (FMI) and the common reference standard of the key comparison, maintained by the Bureau International des Poids et Mesures (BIPM). The instruments have been compared over a nominal ozone amount fraction range of 0 nmol mol-1 to 500 nmol mol-1.
To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/.
The final report has been peer-reviewed and approved for publication by the CCQM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
Switchable metasurface absorber used for enabling reconfigurable power angular spectrum in reverberation chamber
Authors: Zhang Qingqing , Zhao Zhenzhen , Liu Binhui , Xue Wei , Chen Xiaoming , Zheng Junhao , Shi Hongyu , Yi Jianjia , Huang Yi 
Published: March 2024

Abstract
The reverberation chamber (RC) provides a fast and repeatable method for over-the-air (OTA) testing of wireless devices. Moreover, the RC-based method can reduce the OTA testing cost to a great extent. But the defect of the RC is also obvious. Compared to a multi-probe anechoic chamber, the channel spatial characteristics in RC are uncontrollable. The device under test in an RC usually sees a statistically isotropic channel and there is a strong impediment to control the channel in RC, which constrains the RC’s OTA applications. In this paper, we propose a method to realize reconfigurable RC enabling arbitrary channel power angular spectrum (PAS) by using a switchable metasurface absorber. Specifically, the unit cell of the metasurface can be switched between the reflection and absorption states by providing different bias voltages. By mounting the switchable metasurface absorber on the RC’s inside walls, the boundary conditions of the RC in the covered area could be switched electronically. Consequently, the channel’s PAS can be controlled by changing the local states of the switchable metasurface absorber. As a proof of concept, a prototype of the switchable metasurface absorber is made and comprehensive experiments are conducted to verify the effectiveness of the switchable metasurface applied to enable reconfigurable PAS in RC.
First-principles calculation of self-interstitial atom-impurity atom interactions in ferritic steel
Authors: Li Chunhui , Duan Wenhao , Qiang Wenjiang 
Published: March 2024

Abstract
In this study, the interactions between self-interstitial atoms (SIA) and impurity atoms (Cu and P) in the body-centered cubic (bcc)-Fe matrix have been investigated using the first principles approach. The results show that Cu and P atoms are more prone to segregation on perpendicular and parallel surfaces containing dumbbell atoms, respectively. Next, by combining the charge density difference and considering the electronic structure and lattice distortion, the origin of the binding energy of complexes formed between SIA and impurity atoms was discussed. The results show that as the number of impurity atoms increases, the atomic bonds formed by the interactions between the impurity atoms decrease the binding energy between single impurity atoms and the matrix and reduce the strain field around them, resulting in an increase in the stability of the complexes. Comparison with previous experimental results revealed the reasons for the changes in atomic occupancy during the segregation of Cu and P atoms. The results provide insights into the behavior of impurity atoms in irradiated materials and provide a deeper understanding of the electron level of impurity atomization.
Tunable electronic and optical properties of BAs/WTe2 heterostructure for theoretical photoelectric device design
Authors: Luo Wentao , Wei Xing , Wang Jiaxin , Zhang Yan , Chen Huaxin , Yang Yun , Liu Jian , Tian Ye , Duan Li 
Published: March 2024

Abstract
The geometric structure of the BAs/WTe2 heterojunction was scrutinized by employing ab initio calculations grounded on density functional theory. Multiple configurations are constructed to determine the equilibrium state of the heterojunction with optimal stability. The results show that the H1-type heterojunction with interlayer distance of 3.92 Å exhibits exceptional stability and showcases a conventional Type-II band alignment, accompanied by a direct band gap measuring 0.33 eV. By applying external electric field and introducing strain, one can efficaciously modulate both the band gap and the quantity of charge transfer in the heterojunction, accompanied by the transition of band alignment from Type-II to Type-I, which makes it expected to achieve broader applications in light-emitting diodes, laser detectors and other fields. Ultimately, the heterojunction undergoes a transformation from a semiconducting to a metallic state. Furthermore, the outstanding optical characteristics inherent to each of the two monolayers are preserved, the BAs/WTe2 heterojunction also serves to enhance the absorption coefficient and spectral range of the material, particularly within the ultraviolet spectrum. It merits emphasis that the optical properties of the BAs/WTe2 heterojunction are capable of modification through the imposition of external electric fields and mechanical strains, which will expand its applicability and potential for future progression within the domains of nanodevices and optoelectronic apparatus.
Damped least squares method for nonlinear mixed additive and multiplicative errors model
Authors: Wang Leyang , Zhao Weifeng 
Published: March 2024

Abstract
Measurement data in the field of modern geodesy contains not only additive errors but also multiplicative errors related to signal strength. The existing models for dealing with mixed additive and multiplicative errors are mainly based on the linear form of unknown parameters and observations, and there are few studies on the nonlinear form of the two. In the parameter estimation method of the nonlinear mixed additive and multiplicative errors model, the initial value of the Gauss–Newton parameter estimation method is selected by previous experience. The initial value determined by this method deviates far from the true value due to a lack of experience, which will lead to inaccurate parameter estimation results. In order to solve this problem, based on the least squares principle and the introduction of the damping factor, this paper deduces the damping least squares parameter solution formula for the parameter estimation of the nonlinear mixed additive and multiplicative errors model. The superiority of the damping least squares algorithm is reflected in the adjustment of the damping factor, taking into account the advantages of the Gauss–Newton method and the steepest descent method, and some weighted selection is obtained in the two algorithms. The calculation and comparative analysis of the simulated cases show that the damped least squares method is more suitable for handling geodetic data with this nonlinear mixed additive and multiplicative errors model when the initial value deviates far from the true value.
High-performance, large-area flexible SERS substrates prepared by reactive ion etching for molecular detection
Authors: Yang Xing , Zeng Pei , Zhou Yuting , Wang Qingyu , Zuo Jiankun , Duan Huigao , Hu Yueqiang 
Published: March 2024

Abstract
In the realm of molecular detection, the surface-enhanced Raman scattering (SERS) technique has garnered increasing attention due to its rapid detection, high sensitivity, and non-destructive characteristics. However, conventional rigid SERS substrates are either costly to fabricate and challenging to prepare over a large area, or they exhibit poor uniformity and repeatability, making them unsuitable for inspecting curved object surfaces. In this work, we present a flexible SERS substrate with high sensitivity as well as good uniformity and repeatability. First, the flexible polydimethylsiloxane (PDMS) substrate is manually formulated and cured. SiO2/Ag layer on the substrate can be obtained in a single process by using ion beam sputtering. Then, reactive ion etching is used to etch the upper SiO2 layer of the film, which directly leads to the desired densely packed nanostructure. Finally, a layer of precious metal is deposited on the densely packed nanostructure by thermal evaporation. In our proposed system, the densely packed nanostructure obtained by etching the SiO2 layer directly determines the SERS ability of the substrate. The bottom layer of silver mirror can reflect the penetrative incident light, the spacer layer of SiO2 and the top layer of silver thin film can further localize the light in the system, which can realize the excellent absorption of Raman laser light, thus enhancing SERS ability. In the tests, the prepared substrates show excellent SERS performance in detecting crystalline violet with a detection limit of 10−11 M. The development of this SERS substrate is anticipated to offer a highly effective and convenient method for molecular substance detection.
Thermocapillary thin films: periodic steady states and film rupture
Authors: Bruell Gabriele , Hilder Bastian , Jansen Jonas 
Published: March 2024

Abstract
We study stationary, periodic solutions to the thermocapillary thin-film model

∂
t

h
+

∂
x

h
3

∂
x
3

h
−
g

∂
x

h

+
M

h
2

1
+
h

2

∂
x

h

=
0
,
t
>
0
,

x
∈

R

,

which can be derived from the Bénard–Marangoni problem via a lubrication approximation. When the Marangoni number M increases beyond a critical value

M
∗

, the constant solution becomes spectrally unstable via a (conserved) long-wave instability and periodic stationary solutions bifurcate. For a fixed period, we find that these solutions lie on a global bifurcation curve of stationary, periodic solutions with a fixed wave number and mass. Furthermore, we show that the stationary periodic solutions on the global bifurcation branch converge to a weak stationary periodic solution which exhibits film rupture. The proofs rely on a Hamiltonian formulation of the stationary problem and the use of analytic global bifurcation theory. Finally, we show the instability of the bifurcating solutions close to the bifurcation point and give a formal derivation of the amplitude equation governing the dynamics close to the onset of instability.
Performance analysis of electrical signal output of multi-state flexoelectric structures with parameter uncertainties through quasi-Monte Carlo method
Authors: Liu Xiao-Xiao , Xu Yang-Bing , Han Chen , Zhang Feng 
Published: March 2024

Abstract
Flexoelectric effect is a more universal electromechanical coupling effect than piezoelectric effect. Flexoelectric beams as the main structural component of flexoelectric power signal output have broad application prospects in the next generation of micro–nano electromechanical systems. However, the electrical signal output of flexoelectric structures in macro-scale is far less than the output of the piezoelectric signal. Therefore, it is urgent to explore the influence of the parameter uncertainties on the electrical signal output of the flexoelectric structures, in order to improve the electrical signal output of flexoelectric materials with excellent design performance. Based on the quasi-static theory, the output voltage model and the output charge model of flexoelectric structures as well as the effective piezoelectric coefficient model are constructed. Then the influences of the flexoelectric parameters on the output voltage and the output charge are researched as well as the influence of the effective piezoelectric coefficient. Finally, the influences of uncertain parameters under different electrical states (e.g. the electrical open circuit and short circuit states) on the output performance of flexoelectric signal are studied by the quasi-Monte Carlo method, in order to further provide a reference for the reliability analysis and optimization design of the flexoelectric structures.