bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sentiment Analysis of Finnish Twitter Discussions on COVID-19 During the Pandemic
Authors: Claes Maëlick , Farooq Umar , Salman Iflaah , Teern Anna , Isomursu Minna , Halonen Raija 
Published: February 2024

AbstractWith the outbreak of the COVID-19 pandemic, researchers have studied how people reacted on social media during the pandemic. Sentiment analysis has been leveraged to gain insight. However, much of the research conducted on both sentiment analysis and social media analysis of COVID-19 often focuses on widespread languages, such as English and Chinese. This is partly due to the scarcity of resources for natural language processing and sentiment analysis for morphologically complex and less prevalent languages such as Finnish. This paper aims to analyze sentiments on Twitter in the Finnish language during the COVID-19 pandemic. We manually annotate with sentiments a random sample of 1943 tweets about COVID-19 in Finnish. We use it to build binomial and multinomial logistic regression models with Lasso penalty by exploiting ngrams and two existing sentiment lexicons. We also build two similar models using an existing (pre-COVID-19) Twitter dataset for comparison. The best-performing model for the Finnish language is then used to determine the trends of positive, negative, and neutral opinions on a collection of tweets in Finnish extracted between April 21 and June 18, 2020. The best sentiment polarity prediction model for the Finnish language attain 0.785 AUC, 0.710 balanced accuracy, and 0.723 macro-averaged F1 for predicting positive and negative polarity (binomial classification), and 0.667 AUC, 0.607 balanced accuracy, and 0.475 F1 when adding neutral tweets (multinomial classification). On the other hand, the pre-COVID-19 model trained on the same number of tweets exhibits higher accuracy for the multinomial model (0.687 balanced accuracy, and 0.588 F1). We hypothesize that this loss of performance is due to the COVID-19 context that makes sentiment analysis of neutral tweets more difficult for the machine learning algorithm to predict. Running the model on all the extracted Finnish tweets, we observe a decrease in negativity and an increase in positivity over the observed time as the Finnish government lifts restrictions. Our results show that applying an existing general-purpose sentiment analyzer on tweets that are domain-specific, such as COVID-19, provides lower accuracy. More effort in the future needs to be invested in using and developing sentiment analysis tools tailored to their application domain when conducting large-scale social media analysis of specific medical issues, such as a global pandemic.
Functional testing of entirely additively manufactured two-component hydraulic rod seals made of TPU and NBR
Authors: Ebel Thomas , Lankenau Tobias , Sundermann Lion , Ottink Kathrin , Graf Matthias , Klie Benjamin , Giese Ulrich 
Published: February 2024

AbstractThe delivery time of expendable items can be quite high despite today’s sophisticated logistics and production systems. In the case of dynamic rod seals for hydraulic applications, this can last weeks or even months. A possible solution to avoid shutdowns can be the fast production of seals using additive manufacturing (AM), at least to use these parts until conventionally produced spare parts arrive. The research question addressed in this study is whether it is possible to produce functional parts in this way to avoid leakage. The paper starts with an introduction to the topic and introduces the materials and equipment used to conduct the study. The main part of this paper includes the documentation of the results of two series of functional tests conducted with five different thermoplastic materials. These tests showed that the research question can be answered in an affirmative way for tested pressures up to 15 MPa and a sliding distance of 320 m. However, the results show different behaviors of conventionally produced seals and those made using AM.
INTRODUCING THE TSINGHUA UNIVERSITY *WU JI 五紀 MANUSCRIPT WITH A FOCUS ON ITS MATERIALITY AND ITS STATUS AS A SOURCE
Authors: Krijgsman Rens 
Published: February 2024

AbstractThe recently published Tsinghua University bamboo manuscript *Wu ji 五紀 presents a manuscript copy that is riddled with curious irregularities, omissions, and mistakes in its text, punctuation, and the preparation of the slips. Only some of these mistakes were corrected by a proofreader, others reveal errors of misunderstanding by the scribe and/or punctuator. Furthermore, paratext that was included in a previous instantiation of the text was only preserved in paratextual notes in the present copy. An analysis of these aspects of the manuscript helps shed light on its potential status as a source and raises questions about the relationship between unearthed and transmitted texts more generally.
Cultural evolution: A review of theoretical challenges
Authors: Nichols Ryan , Charbonneau Mathieu , Chellappoo Azita , Davis Taylor , Haidle Miriam , Kimbrough Erik O. , Moll Henrike , Moore Richard , Scott-Phillips Thom , Purzycki Benjamin Grant , Segovia-Martin Jose 
Published: February 2024

Abstract
The rapid growth of cultural evolutionary science, its expansion into numerous fields, its use of diverse methods, and several conceptual problems have outpaced corollary developments in theory and philosophy of science. This has led to concern, exemplified in results from a recent survey conducted with members of the Cultural Evolution Society, that the field lacks ‘knowledge synthesis’, is poorly supported by ‘theory’, has an ambiguous relation to biological evolution and uses key terms (e.g. ‘culture’, ‘social learning’, ‘cumulative culture’) in ways that hamper operationalization in models, experiments and field studies. Although numerous review papers in the field represent and categorize its empirical findings, the field's theoretical challenges receive less critical attention even though challenges of a theoretical or conceptual nature underlie most of the problems identified by Cultural Evolution Society members. Guided by the heterogeneous ‘grand challenges’ emergent in this survey, this paper restates those challenges and adopts an organizational style requisite to discussion of them. The paper's goal is to contribute to increasing conceptual clarity and theoretical discernment around the most pressing challenges facing the field of cultural evolutionary science. It will be of most interest to cultural evolutionary scientists, theoreticians, philosophers of science and interdisciplinary researchers.
Startups’ contribution to SDGs: A tailored framework for assessing social impact
Authors: Gionfriddo Gianluca , Piccaluga Andrea 
Published: February 2024

AbstractStartups play a crucial role in advancing the Sustainable Development Goals (SDGs) through their innovative solutions that increasingly focus on sustainability. However, they face significant challenges in effectively assessing their contribution to the SDGs. In our study, by adopting an action-research methodology, we develop and introduce Prosper, i.e., a tailored social impact assessment (SIA) framework for startups. First, we conducted a comprehensive review of existing methods and standards for assessing social impact to establish an initial foundation of Prosper. Second, we refined Prosper based on an empirical validation on five startups. By embracing action research, we aim to empower startups with a robust and user-friendly tool, which facilitates SIA and representation. We also contribute to the literature aimed at overcoming the existing sustainability barriers for startups and to respond to the call for assisting them in reporting about SDGs. We also discuss practical implications and future research avenues.
Normal Mode Copulas for Nonmonotonic Dependence
Authors: Fukumoto Kentaro 
Published: February 2024

AbstractCopulas are helpful in studying joint distributions of two variables, in particular, when confounders are unobserved. However, most conventional copulas cannot model joint distributions where one variable does not increase or decrease in the other in a monotonic manner. For instance, suppose that two variables are linearly positively correlated for one type of unit and negatively for another type of unit. If the type is unobserved, we can observe only a mixture of both types. Seemingly, one variable tends to take either a high or low value (or a middle value) when the other variable is small (large), or vice versa. To address this issue, I consider an overlooked copula with trigonometric functions (Chesneau [2021, Applied Mathematics, 1(1), pp. 3–17]) that I name the “normal mode copula.” I apply the copula to a dataset about government formation and duration to demonstrate that the normal mode copula has better performance than other conventional copulas.
What’s next for the field of multigenerational mental health? The need for deep behavioral phenotyping via a prenatal mental health registry
Authors: Conradt Elisabeth , Carter Sierra , Crowell Sheila E. 
Published: February 2024

AbstractFrom its inception, development and psychopathology theorists have sought to uncover the earliest forms of risk for mental health challenges in children, to prevent the development of more severe, intractable manifestations of psychopathology. Large familial risk registries have advanced our understanding of early, potentially modifiable factors that could prevent or mitigate the expression of challenging symptoms of neurodevelopmental conditions, and similar registries have been proposed to advance understanding of ADHD and related phenotypes. Data from single-site studies, largely focused on perinatal exposure to maternal mood disorders, reveal that a robust predictor of child psychopathology is parental psychopathology. However, early developmental trajectories of psychopathology risk may be better captured using transdiagnostic approaches in pregnancy, capturing the full range of mental health symptoms. We describe here the need for a parental mental health registry that begins prenatally that includes deep behavioral phenotyping across a range of transdiagnostic indicators of mental health risk to prevent psychopathology in children. This registry has the potential to uncover pathways to psychopathology risk in childhood and support the discovery of novel mechanisms to be targeted for prevention and intervention.
Massive-Star Feedback at Low Metallicity
Authors: Oey M. S. , Jecmen M. C. , Sawant A. N. , Jaskot A. E. , Danehkar A. , Smith L. J. , Melinder J. 
Published: February 2024

AbstractEarly cosmic epochs are characterized by low metallicity and high specific star-formation rates. These conditions are dominated by massive-star feedback that may be dramatically different than the traditional model dominated by hot, thermal superwinds driven by supernova explosions. Instead, metal-poor feedback from massive stars may be radiation-dominated, with weak mechanical feedback, possibly aiding the escape of Lyα and Lyman continuum radiation. I will describe our understanding that is emerging from observations of starburst galaxies in the local universe.
Role of ISM/IGM Energy Balance in Structure Formation and Evolution of Galaxies
Authors: Tabatabaei F. , Ghasemi-Nodehi M. , Sargent M. , Murphy E. J. , Schinnerer E. , Bonaldi A. ,   the SKA ISM/IGM Focus Group
Published: February 2024

AbstractInvestigating the thermal and non-thermal processes in galaxies is vital to understand their evolution over cosmic time. This can best be studied by combining the radio and optical/near-infrared observations of galaxies. The JWST can resolve the evolution of the thermal processes by mapping ionized gas and dust in distant galaxies. This information combined with the upcoming surveys with the Square Kilometer Array (SKA) will make a major breakthrough in mapping the non-thermal processes and understanding their role in the evolution of galaxies. Our simulations show that SKA surveys will be able to trace the evolution history of spiral galaxies such as M 51 and NGC 6946 back to a redshift of 3 already in its first phase of construction. This study indicates the important role of the non-thermal pressure inserted by cosmic rays and magnetic fields in deriving winds and outflows at cosmic noon as deduced by a flat synchrotron spectrum in star forming galaxies.
Adapting Hydropower to European Union Water Law: Flexible Governance versus Legal Effectiveness in Sweden and Finland
Authors: Puharinen Suvi-Tuuli , Belinskij Antti , Soininen Niko 
Published: February 2024

AbstractIn both Sweden and Finland, water law has traditionally provided strong protection for hydropower operations by issuing permanent environmental licences. This national protection has started to erode as a result of the requirement of the European Union (EU) Water Framework Directive (WFD) for permit reviews to improve the ecological status of rivers. In the light of this dynamic between European and national frameworks, this article compares the Swedish and Finnish implementation of the WFD regarding existing hydropower operations. Whereas Sweden has adopted comprehensive legislative and policy reforms that embrace a systemic perspective on reconciling hydropower with the current societal and ecological circumstances, Finland has relied on bottom-up collaborative processes at the grassroots level. The article shows that both approaches are problematic in so far as they push the boundaries of proper implementation of the WFD and, by extension, the achievement of the ecological objectives of the WFD in waters affected by hydropower. Our comparison highlights tensions between EU law requirements for formal legal effectiveness in national implementation, and the WFD's aspirations for adaptive river basin-based governance.
Controlling Factors of the Seasonal Variation of the Latitudinal Location of the Equatorial Ionization Anomaly Crest
Authors: Liu Jing , Zhang Donghe , Li Quanhan , Tian Yaoyu , Coster Anthea , Hao Yongqiang , Xiao Zuo 
Published: February 2024

AbstractThe latitudinal location of the Equatorial Ionization Anomaly (EIA) crest has seasonal variation, and there are disagreements on the interpretation of such seasonal characteristic in previous studies. Some studies suggested that this seasonal characteristic is determined by the seasonal characteristic of the equatorial electric field. Others suggested that this seasonal characteristic is determined by the seasonal changes of the thermospheric wind. The current paper uses Total Electron Content (TEC) data and the Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM) to analyze the seasonal variation of the northern EIA crest in the eastern Asian sector under low solar activity. Our results show that the monthly averaged latitudinal location of the northern EIA crest has a good linear relationship (r = 0.74) with the monthly averaged Equatorial Electrojet (EEJ) intensity, which is a commonly used proxy of the eastward electric field. However, TIEGCM simulations with and without F‐region wind indicate that such a relationship might be attributed to wind effects. Additionally, the linear relationship between the EEJ intensity and the northern‐southern EIA crest distance is not significant (r = 0.47) in the eastern Asian sector. Our results suggest that a good correspondence between the eastward electric field and the latitudinal location of the EIA crest is not assured annually, as the seasonally varying F‐region wind significantly influences EIA evolution.
Relativistic Electron Precipitation Driven by Mesoscale Transients, Inferred From Ground and Multi‐Spacecraft Platforms
Authors: Artemyev A. V. , Zhang X.‐J. , Demekhov A. G. , Meng X. , Angelopoulos V. , Fedorenko Yu. V. 
Published: February 2024

AbstractPrecipitation of relativistic electrons into the Earth's atmosphere regulates the outer radiation belt fluxes and contributes to magnetosphere‐atmosphere coupling. One of the main drivers of such precipitation is electron scattering by whistler‐mode waves. Such waves typically originate at the equator, where they can resonate with and scatter sub‐relativistic (tens to a few hundred keV) electrons. However, they can occasionally propagate far away from the equator along field lines, reaching middle latitudes, where they can resonate with and scatter relativistic (>500 keV) electrons. Such a propagation is typical for the dayside, but statistically has not been found on the nightside where the waves are quickly damped along their propagation due to Landau damping. Here we explore two events of relativistic electron precipitation from low‐altitude observations on the nightside. Combining measurements of whistler‐mode waves from ground observatories, relativistic electron precipitation from low‐altitude satellites, total electron content maps from GPS receivers, and magnetic field and electron flux from equatorial satellites, we show wave ducting by plasma density gradients is the possible channel that allows the waves to reach middle latitudes and scatter relativistic electrons. We suggest that both whistler‐mode wave generation and ducting can be driven by equatorial mesoscale (with spatial scales of about one Earth radius) transient structures during nightside injections. We also compare these nightside events with observations of ducted waves and relativistic electron precipitation at the dayside, where wave generation and ducting are driven by ultra‐low‐frequency waves. This study demonstrates the potential importance of mesoscale transients in relativistic electron precipitation, but does not however unequivocally establish that ducted whistler‐mode waves are the primary cause of the observed electron precipitation.
Pharmacogenomic overlap between antidepressant treatment response in major depression & antidepressant associated treatment emergent mania in bipolar disorder
Authors: Nuñez Nicolas A. , Coombes Brandon J. , Beaupre Lindsay Melhuish , Ozerdem Aysegul , Resendez Manuel Gardea , Romo-Nava Francisco , Bond David J. , Veldic Marin , Singh Balwinder , Moore Katherine M. , Betcher Hannah K. , Kung Simon , Prieto Miguel L. , Fuentes Manuel , Ercis Mete , Miola Alessandro , Sanchez Ruiz Jorge A. , Jenkins Gregory , Batzler Anthony , Leung Jonathan G. , Cuellar-Barboza Alfredo , Tye Susannah J. , McElroy Susan L. , Biernacka Joanna M. , Frye Mark A. 
Published: February 2024

AbstractThere is increasing interest in individualizing treatment selection for more than 25 regulatory approved treatments for major depressive disorder (MDD). Despite an inconclusive efficacy evidence base, antidepressants (ADs) are prescribed for the depressive phase of bipolar disorder (BD) with oftentimes, an inadequate treatment response and or clinical concern for mood destabilization. This study explored the relationship between antidepressant response in MDD and antidepressant-associated treatment emergent mania (TEM) in BD. We conducted a genome-wide association study (GWAS) and polygenic score analysis of TEM and tested its association in a subset of BD-type I patients treated with SSRIs or SNRIs. Our results did not identify any genome-wide significant variants although, we found that a higher polygenic score (PGS) for antidepressant response in MDD was associated with higher odds of TEM in BD. Future studies with larger transdiagnostic depressed cohorts treated with antidepressants are encouraged to identify a neurobiological mechanism associated with a spectrum of depression improvement from response to emergent mania.
Phosphorylation-dependent deubiquitinase OTUD3 regulates YY1 stability and promotes colorectal cancer progression
Authors: Wu Liang , Zhou Zili , Yu Yang , Cheng Can , Zhou Shuai , Yan Yuan , Yu Bofan , Zhang Yuwei , Liu Zhengyi 
Published: February 2024

AbstractYin Yang 1 (YY1) is a key transcription factor that has been implicated in the development of several malignancies. The stability of YY1 is regulated by the ubiquitin-proteasome system. The role of deubiquitinases (DUBs) and their impact on YY1 remain to be fully elucidated. In this study, we screened for ubiquitin-specific proteases that interact with YY1, and identified OTUD3 as a DUB for YY1. Over-expressed OTUD3 inhibited YY1 degradation, thereby increasing YY1 protein levels, whereas OTUD3 knockdown or knockout promoted YY1 degradation, thereby decreasing the proliferation of colorectal cancer (CRC). Furthermore, PLK1 mediates OTUD3 S326 phosphorylation, which further enhances OTUD3 binding and deubiquitination of YY1. In CRC tissues, elevated the expression level of OTUD3 and YY1 were significantly associated with poor prognostic outcomes. These findings suggest that the OTUD3-YY1 pathway has therapeutic potential in CRC, and OTUD3 plays a critical role in regulating YY1.
Dual-color emissive OLED with orthogonal polarization modes
Authors: Chen Ruixiang , Liang Ningning , Zhai Tianrui 
Published: February 2024

AbstractLinearly polarized organic light-emitting diodes have become appealing functional expansions of polarization optics and optoelectronic applications. However, the current linearly polarized diodes exhibit low polarization performance, cost-prohibitive process, and monochromatic modulation limit. Herein, we develop a switchable dual-color orthogonal linear polarization mode in organic light-emitting diode, based on a dielectric/metal nanograting-waveguide hybrid-microcavity using cost-efficient laser interference lithography and vacuum thermal evaporation. This acquired diode presents a transverse-electric/transverse-magnetic polarization extinction ratio of 15.8 dB with a divergence angle of ±30°, an external quantum efficiency of 2.25%, and orthogonal polarized colors from green to sky-blue. This rasterization of dielectric/metal-cathode further satisfies momentum matching between waveguide and air mode, diffracting both the targeted sky-blue transverse-electric mode and the off-confined green transverse-magnetic mode. Therefore, a polarization-encrypted colorful optical image is proposed, representing a significant step toward the low-cost high-performance linearly polarized light-emitting diodes and electrically-inspired polarization encryption for color images.
Tough double network hydrogels with rapid self-reinforcement and low hysteresis based on highly entangled networks
Authors: Zhu Ruixin , Zhu Dandan , Zheng Zhen , Wang Xinling 
Published: February 2024

AbstractMost tough hydrogels are reinforced by introducing energy dissipation mechanisms, but simultaneously realizing a high toughness and low hysteresis is challenging because the energy dissipation structure cannot recover rapidly. In this work, high mechanical performance highly entangled double network hydrogels without energy dissipation structure are fabricated, in which physical entanglements act as the primary effective crosslinking in the first network. This sliding entanglement structure allows the hydrogel network to form a highly uniform oriented structure during stretching, resulting in a high tensile strength of ~3 MPa, a fracture energy of 8340 J m−2 and a strain-stiffening capability of 47.5 in 90% water content. Moreover, almost 100% reversibility is obtained in this hydrogel via energy storage based on entropy loss. The highly entangled double network structure not only overcomes the typical trade-off between the high toughness and low hysteresis of hydrogels, but more importantly, it provides an insight into the application of entanglement structures in high-performance hydrogels.