bluuebunny/crossref_metadata_2025_split huggingface dataset:
Practical Aspects of Instantaneous Magnetization Power Functions of Silicon Iron Laminations
Authors: Pfützner Helmut , Shilyashki Georgi , Bengtsson Claes , Huber Emanuel 
Published: October 2022

AbstractMagnetic energy loss P of SiFe steel represents a key factor for the efficiency of soft magnetic machine cores. Traditionally, they are operated with 50 Hz (or 60 Hz), a frequency value that yields rather balanced portions of hysteresis loss and eddy current loss. In equivalent circuits of transformers, P tends to be represented by a magnetic power resistance RM, as a constant. For the most important case of sinusoidal induction B of 50 Hz, this would correspond to an instantaneous magnetization power function p(t) that is sinusoidal as well, however, with 100 Hz (or 120 Hz). On the other hand, from complex, non-linear mechanisms of hysteresis, it is obvious that p(t) should be strongly non-sinusoidal, even for exactly sinusoidal B(t). So far, almost all corresponding instantaneous investigations were restricted to calculated modelling of loss portions and transient modelling. On the other hand, for the first time, the present study was focussed on functions p(t) as measured at IEC-standardized samples of industrially relevant steel. Practical evaluations are discussed with respect to the revealed “history” of magnetization processes, as well as for product characterization. For these tasks, a novel digitized “Low-mass Single Sheet Tester” was developed that was applied for both non-oriented steel (NO) and grain-oriented steel (GO), for 50 Hz. Interpretations proved to be favoured by relating p(t) to total P, according to an instantaneous power ratio. As a result, both steel types revealed strongly non-sinusoidal power functions, with short durations of negative p. Negative p proved to be most pronounced for NO steel, as a measure for the onset of reversible turns of atomic moments. As a consequence, p(t) comprises strong upper harmonics of 200 Hz and even 300 Hz. Based on theoretical considerations, we split p(t) in a dissipative loss power function pL(t) and in a potential energy power function pP(t). Finally, we used p(t) to determine the corresponding power resistance RM(t) that proves to be a distinctly nonlinear function as well. It resembles a rectified co-sinus, also exhibiting short negative spikes that reflect the crystallographic dis-orientation of the polycrystalline material.
Ori-Finder 2022: A Comprehensive Web Server for Prediction and Analysis of Bacterial Replication Origins
Authors: Dong Mei-Jing , Luo Hao , Gao Feng 
Published: October 2022

Abstract
The replication of DNA is a complex biological process that is essential for life. Bacterial DNA replication is initiated at genomic loci referred to as replication origins (oriCs). Integrating the Z-curve method, DnaA box distribution, and comparative genomic analysis, we developed a web server to predict bacterial oriCs in 2008 called Ori-Finder, which is helpful to clarify the characteristics of bacterial oriCs. The oriCs of hundreds of sequenced bacterial genomes have been annotated in the genome reports using Ori-Finder and the predicted results have been deposited in DoriC, a manually curated database of oriCs. This has facilitated large-scale data mining of functional elements in oriCs and strand-biased analysis. Here, we describe Ori-Finder 2022 with updated prediction framework, interactive visualization module, new analysis module, and user-friendly interface. More species-specific indicator genes and functional elements of oriCs are integrated into the updated framework, which has also been redesigned to predict oriCs in draft genomes. The interactive visualization module displays more genomic information related to oriCs and their functional elements. The analysis module includes regulatory protein annotation, repeat sequence discovery, homologous oriC search, and strand-biased analyses. The redesigned interface provides additional customization options for oriC prediction. Ori-Finder 2022 is freely available at http://tubic.tju.edu.cn/Ori-Finder/ and https://tubic.org/Ori-Finder/.
WANG MANG 王莽 (c. 45 b.c.e.–23 c.e.) AND CLASSICAL LEARNING AS PATH TO SUPREME POWER
Authors: L'Haridon Béatrice 
Published: October 2022

AbstractThis article inquires into the ideological circumstances behind Wang Mang's 王莽 seizure of power, to examine how he built legitimacy at every stage of his career, by establishing a political and symbolic continuum between the role of the minister and that of the sovereign, rather than suddenly wresting power from the Liu clan. His classical learning in general and his references to Zhougong 周公 in particular were fundamental to the success of the process, which took place in three important stages: first, the offering of a white pheasant to the court; second, the bestowal of “Nine Conferrals” 九錫, and third, the composition of “Wang Mang's declaration” 莽誥. However, although the Classics constituted common references for Wang Mang and the scholars supporting him, the Classics were also used by some opponents objecting to the concentration of power in the hands of Wang Mang.
The radio source in Abell 980: A Detached-Double-Double Radio Galaxy?
Authors: Gopal-Krishna  , Paul Surajit , Salunkhe Sameer , Sonkamble Satish 
Published: October 2022

Abstract
It is argued that the new morphological and spectral information gleaned from the recently published LoFAR Two metre Sky Survey data release 2 (LoTSS-2 at 144 MHz) observations of the cluster Abell 980 (A980), in combination with its existing GMRT and VLA observations at higher frequencies, provide the much-needed evidence to strengthen the proposal that the cluster’s radio emission comes mainly from two double radio sources, both produced by the brightest cluster galaxy (BCG) in two major episodes of jet activity. The two radio lobes left from the previous activity have become diffuse and developed an ultra-steep radio spectrum while rising buoyantly through the confining hot intra-cluster medium (ICM) and, concomitantly, the host galaxy has drifted to the cluster centre and entered a new active phase manifested by a coinciding younger double radio source. The new observational results and arguments presented here bolster the case that the old and young double radio sources in A980 conjointly represent a ‘double-double’ radio galaxy whose two lobe pairs have lost colinearity due to the (lateral) drift of their parent galaxy, making this system by far the most plausible case of a ‘Detached-Double-Double Radio Galaxy’ (dDDRG).
Older people's intention to use medical apps during the COVID-19 pandemic in China: an application of the Unified Theory of Acceptance and Use of Technology (UTAUT) model and the Technology of Acceptance Model (TAM)
Authors: Ma Yin , Luo Muyuan 
Published: October 2022

AbstractPrevious studies on older adults' intention to adopt medical apps during irregular circumstances like the COVID-19 outbreak are still in its infancy. In order to fill this knowledge gap, we developed a theoretical framework based on the Unified Theory of Acceptance and Use of Technology (UTAUT) model and the Technology of Acceptance Model (TAM) to explain Chinese older people's willingness to use medical apps during the COVID-19 pandemic. We collected 1,318 online questionnaires during the first wave of the pandemic in China in early 2020. We employed structural equation modelling to analyse the data, and the results show that (a) attitudes towards using apps influence older people's intention to use apps significantly; (b) only two factors, perceived usefulness and facilitating conditions, which were proposed in the UTAUT model, significantly predicted the older adults' intention to use apps, but not others; and (c) perceived usefulness, perceived ease of use, subjective norm and facilitating conditions all significantly impact attitudes towards using apps. Further mediation analysis found that attitudes towards using apps significantly mediated the paths suggested in the original UTAUT model. Due to the online survey method we used, older people who do not use the internet were excluded from our sampling process. However, our timely research contributes to the existing literature by showcasing older people's usage of eHealth technology in public health emergencies. It also builds on the broader discussions on technology use by combining the TAM and the UTAUT model, highlighting the vital role of people's attitude towards using technology in shaping their intention to use it.
Between the living and the dead: use, reuse, and imitation of painted portraits in Late Antiquity
Authors: Stafford Grace 
Published: October 2022

AbstractPainted portraits on wood and cloth were common in the ancient world and prized as authentic and lifelike images. Affordable, portable, and desirable, they were an important form of representation, but rarely survive in the archaeological record outside Egypt. This article approaches the study of painted portraiture in a way that does not necessitate the survival of the images themselves. It analyzes evidence for the use, reuse, and imitation of painted portraits in the catacombs of 4th-c. Rome by examining the remains of settings and attachments for portraits, the shadows left by them on walls, and portraits in other media which imitate panel paintings. The article considers why painted portraits were so effective in funerary contexts and what connection they may have had to domestic portraiture. It also explores the development of panel portrait imitation through the phenomenon of the “square nimbus.”
“A Most Valuable Curiosity”: Music Manuscripts, Authorship, Composition, and Gender at the Ephrata Cloister in Eighteenth-Century Pennsylvania
Authors: Herbert Christopher 
Published: October 2022

AbstractThe 1746 Ephrata Codex, a 972-page music manuscript in the Library of Congress, is the central document of this study, which locates and identifies several eighteenth-century composers who were solitary sisters and brothers of the Ephrata Cloister in Lancaster County, Pennsylvania. Ephrata was an insular, mainly celibate, Pietist, Sabbatarian, ascetic community, which, at its height in the 1740s and 1750s, was home to approximately 300 individuals. Like many German diaspora societies in colonial Pennsylvania, it produced devotional prints and manuscripts. Ephrata is unique because most of its spiritual texts and music were written by and for its inhabitants. More than 130 extant Ephrata music manuscripts in libraries, archives, and collections in the United States and United Kingdom comprise a corpus of over 1,500 hymns, composed according to rules mandated in an original music theory treatise. The concept of authorship at Ephrata was complicated: Communal creative activity frequently existed alongside calls for individual recognition, evidenced by name attributions found in printed hymnals and music manuscripts. The solitary sisters’ agency and creative activity at Ephrata brings an added nuance to the discussion of authorship and credit, drawing attention to the contributions of women as creators, a notable exception to the male-dominated sieve of music history. The 2020 release ofVoices in the Wilderness, an album of new Ephrata hymn transcriptions, is connected to this article. Recorded in the Ephrata Meetinghouse, or “Saal,” the room for which the music was composed, it provides a new perspective on Ephrata's composers, compositional methods, and performance practice.
Observation of Source Plasma and Field Variations of a Substorm Brightening Aurora at L ∼ 6 by a Ground‐Based Camera and the Arase Satellite on 12 October 2017
Authors: Chen L. , Shiokawa K. , Miyoshi Y. , Oyama S. , Jun C.‐W. , Ogawa Y. , Hosokawa K. , Inaba Y. , Kazama Y. , Wang S. Y. , Tam S. W. Y. , Chang T. F. , Wang B. J. , Asamura K. , Kasahara S. , Yokota S. , Hori T. , Keika K. , Kasaba Y. , Kumamoto A. , Tsuchiya F. , Shoji M. , Kasahara Y. , Matsuoka A. , Shinohara I. , Imajo S. , Nakamura S. , Kitahara M. 
Published: October 2022

AbstractAuroral brightening is one of the most common phenomena that occur during substorm onset and is usually recognized as a projection of the substorm‐associated magnetospheric plasma dynamics to the ionosphere. However, electromagnetic fields and plasma features associated with the substorm brightening arc have not been well understood. In this study, we present a comprehensive observation of the source plasma and field variations of a substorm brightening aurora in the inner magnetosphere. We performed a unique conjugate observation of a substorm brightening auroral arc observed by a ground‐based camera and by the Arase satellite in the magnetospheric source region at L ∼ 6. The event was observed at Tromsø (69.6°N, 19.2°E), Norway, on 12 October 2017. The brightening arc indicates east‐west structures with longitudinal scales of ∼0.5°–2.0°. Field‐aligned bi‐directional electrons with an energy range between 66 and 1,800 eV were detected by the satellite, simultaneously with the appearance of the brightening arc in the camera. These electrons were probably supplied from the auroral brightening region in the ionosphere, indicating that the satellite was on the same field line of the brightening aurora. The magnetic and electric field data show characteristic fluctuations and earthward Poynting flux around the time that the satellite crossed the aurora. Anti‐phase oscillations between the thermal pressure and the magnetic pressure are also reported. Based on these observations, we suggest the possibility that a ballooning instability occurred in the source region of the substorm brightening arc in the inner magnetosphere at L ∼ 6.
Newly Formed Dawnside, Duskside, and Nightside Subauroral Flows Developed During Magnetically Active Times
Authors: Horvath Ildiko , Lovell Brian C. 
Published: October 2022

AbstractWe study the newly formed (with an upper limit of ∼101 min) subauroral flows in the topside ionosphere. These include the dawnside subauroral flows observed at ∼5–6 magnetic local time (MLT), the duskside sub‐auroral polarization streams (SAPS) at ∼15 MLT, and the nightside sub‐auroral ion drifts (SAID) at ∼19–20 MLT. We employ the same types of observations for investigating the various underlying magnetospheric processes related to the development of the newly formed subauroral flows. These processes include (a) the stretching of magnetic field lines (leading to plasma density dropouts) due to the unfolding magnetotail reconnection, (b) the dawnside and nightside diversions of the magnetotail‐reconnection—related earthward plasma flows, (c) the ongoing particle injections, and (d) the trapping of ring current protons at subauroral and auroral latitudes. Based on these processes (a–d), we found strong similarities in the development of the newly formed dawnside and duskside/nightside subauroral flows investigated. At the dawnside plasmapause in the inner magnetosphere equatorial plane, the outward and duskward electric (E) field components provide observational evidence that the newly formed dawnside rapid narrow subauroral flows were SAID developing in the dawn sector. Evidence shows that the newly formed dawnside broad subauroral flow channel was associated with upward Region 2 (R2) field‐aligned currents (FACs) and equatorward subauroral polarization E field, and thus, was the dawnside equivalent of the duskside SAPS associated with downward R2 FACs and poleward subauroral polarization E field. Further evidence includes the inner magnetosphere observations of the hot zone both on the dusk/nightside and on the dawnside.
Optimizing Earthquake Nowcasting With Machine Learning: The Role of Strain Hardening in the Earthquake Cycle
Authors: Rundle John B. , Yazbeck Joe , Donnellan Andrea , Fox Geoffrey , Ludwig Lisa Grant , Heflin Michael , Crutchfield James 
Published: October 2022

AbstractNowcasting is a term originating from economics, finance, and meteorology. It refers to the process of determining the uncertain state of the economy, markets or the weather at the current time by indirect means. In this paper, we describe a simple two‐parameter data analysis that reveals hidden order in otherwise seemingly chaotic earthquake seismicity. One of these parameters relates to a mechanism of seismic quiescence arising from the physics of strain‐hardening of the crust prior to major events. We observe an earthquake cycle associated with major earthquakes in California, similar to what has long been postulated. An estimate of the earthquake hazard revealed by this state variable time series can be optimized by the use of machine learning in the form of the Receiver Operating Characteristic skill score. The ROC skill is used here as a loss function in a supervised learning mode. Our analysis is conducted in the region of 5° × 5° in latitude‐longitude centered on Los Angeles, a region which we used in previous papers to build similar time series using more involved methods (Rundle & Donnellan, 2020, https://doi.org/10.1029/2020EA001097; Rundle, Donnellan et al., 2021, https://doi.org/10.1029/2021EA001757; Rundle, Stein et al., 2021, https://doi.org/10.1088/1361-6633/abf893). Here we show that not only does the state variable time series have forecast skill, the associated spatial probability densities have skill as well. In addition, use of the standard ROC and Precision (PPV) metrics allow probabilities of current earthquake hazard to be defined in a simple, straightforward, and rigorous way.
A Method for Assimilating Pseudo Dewpoint Temperature as a Function of GLM Flash Extent Density in GSI‐Based EnKF Data Assimilation System—A Proof of Concept Study
Authors: Pan Sijie , Gao Jidong 
Published: October 2022

AbstractIn this study, a new lightning data assimilation (LDA) scheme using Geostationary Lightning Mapper (GLM) flash extent density (FED) is developed and implemented in the National Severe Storms Laboratory Warn‐on‐Forecast System (WoFS). The new LDA scheme first assigns a pseudo relative humidity between the cloud base and a specific layer based on the FED value. Then at each model layer, the pseudo relative humidity is converted to pseudo dewpoint temperature according to the corresponding air temperature. Some sensitivity experiments are performed to investigate how to assign and use GLM/FED in an optimum way. The impact of assimilating this pseudo dewpoint temperature on a short‐term severe weather forecast is preliminarily assessed in this proof‐of‐concept study. A high‐impact weather event in Kansas on 24 May 2021 is used to evaluate the performance of the new scheme on analyses and subsequent short‐term forecasts. The results show that the assimilation of additional FED‐based dewpoint temperature observations along with radar, satellite radiance, and cloud water can improve short‐term (3‐hr) forecast skill in terms of quantitative and qualitative verifications against the observations. The improvement is primarily due to the direct and indirect adjustment of dynamic and thermodynamic conditions through the LDA process. More specifically, the assimilation of FED‐based dewpoint temperature, in addition to the other observations currently used in WoFS, tends to enhance the ingredients required for thunderstorm formation, namely moisture, instability, and lifting mechanism.
Using an Iterative Algorithm to Predict Topography From Vertical Gravity Gradients and Ship Soundings
Authors: Xu Huan , Yu Jinhai 
Published: October 2022

AbstractWith the help of the analytical expression of the vertical gravity gradient (VGG) generated by a rectangular prism, an analytical algorithm for predicting seafloor topography using the VGG data has been studied. Nevertheless, ship sounding data are an essential constraint in solving the seafloor topography. This paper combines ship sounding data with VGG anomaly to predict the seafloor topography. The main research contents include the following: Using the ship soundings and VGG data in the study area, the observation equations about sea depth are established, and the stability of the equations are studied; furthermore, considering the influence of seafloor topography outside the study area on the observation equations, these effects are divided into boundary effects and far‐field effects, and different processing methods are proposed. Finally, the method is tested on the East Pacific Rise, only using VGG anomaly and adding the mean value to fix the boundary region, the RMS error of the results is 108.8 m; SIO's model is added to the boundary region and the seven maximum absolute errors are replaced by ship sounding data, the RMS error of the results can reach 94.2 m and the accuracy improvement is 13.42%.
Temperature Dependence of Clumped Isotopes (∆47) in Aragonite
Authors: de Winter Niels J. , Witbaard Rob , Kocken Ilja J. , Müller Inigo A. , Guo Jingjing , Goudsmit Barbara , Ziegler Martin 
Published: October 2022

AbstractClumped isotope thermometry can independently constrain the formation temperatures of carbonates, but a lack of precisely temperature‐controlled calibration samples limits its application on aragonites. To address this issue, we present clumped isotope compositions of aragonitic bivalve shells grown under highly controlled temperatures (1–18°C), which we combine with clumped isotope data from natural and synthetic aragonites from a wide range of temperatures (1–850°C). We observe no discernible offset in clumped isotope values between aragonitic foraminifera, mollusks, and abiogenic aragonites or between aragonites and calcites, eliminating the need for a mineral‐specific calibration or acid fractionation factor. However, due to non‐linear behavior of the clumped isotope thermometer, including high‐temperature (>100°C) datapoints in linear clumped isotope calibrations causes them to underestimate temperatures of cold (1–18°C) carbonates by 2.7 ± 2.0°C (95% confidence level). Therefore, clumped isotope‐based paleoclimate reconstructions should be calibrated using samples with well constrained formation temperatures close to those of the samples.
On the Ridging of the South Atlantic Anticyclone Over South Africa: The Impact of Rossby Wave Breaking and of Climate Change
Authors: Ivanciu Ioana , Ndarana Thando , Matthes Katja , Wahl Sebastian 
Published: October 2022

AbstractRidging South Atlantic Anticyclones contribute an important amount of precipitation over South Africa. Here, we use a global coupled climate model and the ERA5 reanalysis to separate for the first time ridging highs (RHs) based on whether they occur together with Rossby wave breaking (RWB) or not. We show that the former type of RHs are associated with more precipitation than the latter type. The mean sea level pressure anomalies caused by the two types of RHs are characterized by distinct patterns, leading to differences in the flow of moisture‐laden air onto land. We additionally find that RWB mediates the effect of climate change on RHs during the twenty‐first century. Consequently, RHs occurring without RWB exhibit little change, while those occurring with RWB contribute more precipitation over the southern and less precipitation over the northeastern South Africa in the future.