bluuebunny/crossref_metadata_2025_split huggingface dataset:
Predictive power control strategy without grid voltage sensors of the Vienna rectifier
Authors: Yang Tao , Chen Lan , Miao Yiru 
Published: May 2024

AbstractThis paper proposes a predictive power control strategy for the three‐phase, six‐switch Vienna rectifier without grid voltage sensors to reduce the hardware cost and complexity of a high‐power PWM rectifier system. Firstly, an algorithm for calculating the AC‐side voltage in the αβ coordinate system is derived according to the operating principle of the Vienna rectifier, and a voltage observer is constructed by combining a second‐order low‐pass filter to estimate the grid voltage. Secondly, a soft start method is designed to solve the problem that the rectifier is prone to inrush current when it is started. Furthermore, the control method of grid voltage sensorless is combined with predictive power control with good dynamic characteristics and simple parameter settings to form the control strategy proposed in this paper. Finally, simulation analysis and experimental verification are carried out on the proposed control strategy. Simulation and experimental results show that the grid voltage estimation has high accuracy, a good surge current suppression effect, unit power factor operation, low input current harmonic content, and good dynamic and steady‐state performance. Therefore, the correctness and effectiveness of the strategy proposed in this paper are verified.
Model‐based adaptive control of modular DAB converter for EV chargers
Authors: Cuoghi Stefania , Pittala Lohith Kumar , Mandrioli Riccardo , Cirimele Vincenzo , Ricco Mattia , Grandi Gabriele 
Published: May 2024

AbstractThis paper presents the discrete‐time modelling and control of modular input‐parallel–output‐parallel (IPOP) dual‐active‐bridge (DAB) converters for electric vehicle (EV) charging. The proposed adaptive control system ensures adequate current‐sharing among parallel modules while minimizing DAB current stress by adopting dual phase‐shift modulation. Driven by the growing need for fast EV charging options, the paper highlights the importance of achieving top‐notch control performance, especially with varying load conditions. Specifically, it introduces a discrete‐time model for adjusting controller parameters adaptively, which simplifies the typically cumbersome manual tuning process associated with these systems. The proposed PI formulae are derived to satisfy specifications on the frequency domain as phase margin and the gain crossover frequency of the open loop gain transfer function, ensuring stability and robustness in operation. Moreover, the implementation of these formulae in discrete microcontrollers facilitates seamless PI autotuning for precise current, voltage, or power control. Notably, the proposed control strategy effectively mitigates current overshot issues commonly encountered during module engagement and shedding operations in modular EV chargers. To validate its efficacy, the proposed controller is evaluated through extensive testing and comparisons within the PLECS environment, particularly focusing on a two‐module IPOP‐DAB converter scenario, and including comparisons with classical offline model‐based pole placement methodology. Furthermore, real‐time hardware‐in‐the‐loop experiments are conducted to confirm the feasibility and performance of the proposed controller under realistic EV charging profiles.
A computational efficient approach for distributionally robust unit commitment with enhanced disjointed layered ambiguity set
Authors: Lian Yicheng , Li Yuanzheng , Zhao Yong , Li Yang , Liu Zhiwei , Wang Jianxiao 
Published: May 2024

AbstractTo achieve the sustainable development of the society, renewable energy dominated power systems are gradually formed. However, the uncertainty of renewable power poses challenges for power system operations, such as balancing the load and generation in day‐ahead unit commitment problems. To address this issue, an enhanced disjointed layered ambiguity set is proposed in this paper to effectively capture the uncertainty of renewable generation forecast errors. On this basis, a two‐stage distributionally robust unit commitment optimization problem is formulated, which is computational challenge. To this end, a novel reformation approach and a worst‐case support set identification method are proposed to derive the optimal solution in a computationally efficient way. Simulation results demonstrate that the proposed ambiguity set brings lower operation costs of unit commitment while maintaining similar reliability compared to existing methods. In detail, the proposed ambiguity set achieves a reduction in operating costs of approximately 10.01%. The proposed novel reformation approach and solution method are also shown to have higher computation efficiency than the existing Benders decomposition method, resulting in a reduction in computation time to less than 3.78% of the original duration.
White light computer-aided optical diagnosis of diminutive colorectal polyps in routine clinical practice
Authors: Rondonotti Emanuele , Bergna Irene Maria Bambina , Paggi Silvia , Amato Arnaldo , Andrealli Alida , Scardino Giulia , Tamanini Giacomo , Lenoci Nicoletta , Mandelli Giovanna , Terreni Natalia , Rocchetto SImone , Piagnani Alessandra , Di Paolo Dhanai , Bina Niccolò , Filippi Emanuela , Ambrosiani Luciana , Hassan Cesare , Correale Loredana , Radaelli Franco 
Published: May 2024

Abstract
Background and study aims Artificial Intelligence (AI) systems could make the optical diagnosis (OD) of diminutive colorectal polyps (DCPs) more reliable and objective. This study was aimed at prospectively evaluating feasibility and diagnostic performance of AI-standalone and AI-assisted OD of DCPs in a real-life setting by using a white light-based system (GI Genius, Medtronic Co, Minneapolis, Minnesota, United States).
Patients and methods Consecutive colonoscopy outpatients with at least one DCP were evaluated by 11 endoscopists (5 experts and 6 non-experts in OD). DCPs were classified in real time by AI (AI-standalone OD) and by the endoscopist with the assistance of AI (AI-assisted OD), with histopathology as the reference standard.
Results Of the 480 DCPs, AI provided the outcome “adenoma” or “non-adenoma” in 81.4% (95% confidence interval [CI]: 77.5–84.6). Sensitivity, specificity, positive and negative predictive value, and accuracy of AI-standalone OD were 97.0% (95% CI 94.0–98.6), 38.1% (95% CI 28.9–48.1), 80.1% (95% CI 75.2–84.2), 83.3% (95% CI 69.2–92.0), and 80.5% (95% CI 68.7–82.8%), respectively. Compared with AI-standalone, the specificity of AI-assisted OD was significantly higher (58.9%, 95% CI 49.7–67.5) and a trend toward an increase was observed for other diagnostic performance measures. Overall accuracy and negative predictive value of AI-assisted OD for experts and non-experts were 85.8% (95% CI 80.0–90.4) vs. 80.1% (95% CI 73.6–85.6) and 89.1% (95% CI 75.6–95.9) vs. 80.0% (95% CI 63.9–90.4), respectively.
Conclusions Standalone AI is able to provide an OD of adenoma/non-adenoma in more than 80% of DCPs, with a high sensitivity but low specificity. The human-machine interaction improved diagnostic performance, especially when experts were involved.
Copper-Promoted Dimerization of Benzyl Thiocyanates to Access Functionalized Bibenzyls
Authors: Ranjan De Saroj , Singh Sandeep 
Published: May 2024

AbstractThe synthesis of bibenzyl derivatives holds significance in organic chemistry due to their diverse pharmacological and synthetic applications. Herein, we report a novel copper-promoted dimerization reaction for the efficient synthesis of functionalized bibenzyls from benzyl thiocyanates. The coupling reaction proceeds under aerobic and mild conditions through a cascade C–S bond cleavage in one pot. Diverse substituents, including electron-withdrawing groups on the aryl ring, are well tolerated to afford the desired products in moderate to good yields. The developed protocol could be utilized to obtain the cross-coupling product from two different electron-deficient benzyl thiocyanates.
Fear of Missing Out Syndrome and its Impact on Sleep Quality in Medical Students: A Cross-sectional Study
Authors: Oliveira Jullyane Laysa de Carvalho , Carvalho Neta Otília Jurema de , Athayde Rodolfo Augusto Bacelar de 
Published: May 2024

Abstract
Objective Fear of missing out (FOMO) is a type of social anxiety defined as “intense concern that others may be experiencing rewarding experiences without one's presence,” which can lead to illness. Excessive smartphone use is often associated with FOMO. This study aimed to investigate FOMO among medical university students, as well as factors associated with sleep quality, anxiety, depression, and excessive smartphone use.
Materials and Methods A cross-sectional observational study was conducted using electronic questionnaires and the following scales: FOMO scale/score, Pittsburgh Sleep Quality Index (PSQI), Beck Anxiety Inventory (BAI), Beck Depression Inventory (BDI), and Smartphone Addiction Scale Short Version (SAS SV).
Results Participants included 142 individuals (mean age 23.73 ± 4.98 years, 97 [68.3% female]). All participants were smartphone users. Fear of missing out was present (FOMO score 22.08 ± 6.71) along with poorer sleep quality (PSQI 7.26 ± 3.08) and excessive smartphone use (SAS SV 30.21 ± 10.20). Moderate/severe anxiety (BAI) was reported by 35.2% of participants, while 16.9% had moderate/severe depression (BDI). Positive correlations were found between PSQI and FOMO (p < 0.05), as well as between SAS SV and FOMO (p < 0.001), PSQI (p < 0.001), BAI (p < 0.001), and BDI (p < 0.001).
Discussion High levels of FOMO, poorer sleep quality, symptoms of depression, anxiety, and excessive smartphone use were found among medical students. Furthermore, a positive correlation was demonstrated between these factors, which can directly impact the physical and mental health, as well as the academic performance of these young individuals.
Effects of Paradoxical Sleep Deprivation on MCH and Hypocretin Systems
Authors: Agamme Ana Luiza Dias Abdo , Tufik Sergio , Torterolo Pablo , D'Almeida Vânia 
Published: May 2024

AbstractMelanin-concentrating hormone (MCH) and hypocretins (Hcrt) 1 and 2 are neuropeptides synthesized in the lateral hypothalamic area by neurons that are critical in the regulation of sleep and wakefulness. Their receptors are located in the same cerebral regions, including the frontal cortex and hippocampus. The present study aimed to assess whether 96 hours of paradoxical sleep deprivation alters the functioning of the MCH and hypocretin systems. To do this, in control rats with normal sleep (CTL) and in rats that were deprived of paradoxical sleep (SD), we quantified the following parameters: 1) levels of MCH and hypocretin-1 in the cerebrospinal fluid (CSF); 2) expression of the prepro-MCH (Pmch) and prepro-hypocretin (Hcrt) genes in the hypothalamus; 3) expression of the Mchr1 and Hcrtr1 genes in the frontal cortex and hippocampus; and 4) expression of the Hcrtr2 gene in the hippocampus. These measures were performed at 6 Zeitgeber time (ZT) points of the day (ZTs: 0, 4, 8, 12, 16, and 20). In the SD group, we found higher levels of MCH in the CSF at the beginning of the dark phase. In the frontal cortex, sleep deprivation decreased the expression of Hcrtr1 at ZT0. Moreover, we identified significant differences between the light and dark phases in the expression of Mchr1 and Hcrtr1, but only in the CTL animals. We conclude that there is a day/night modulation in the expression of components of the MCH and hypocretin systems, and this profile is affected by paradoxical sleep deprivation.
Forging the medieval amidst loss: The Public Record Office of Ireland and Ireland’s medieval history
Authors: Biggs Elizabeth 
Published: May 2024

AbstractIn the aftermath of the destruction of the Public Record Office of Ireland (PROI) in June 1922 during the opening battle of the Irish Civil War, and with it seven centuries of records, historians and archivists have had to be creative in their search for sources for medieval Irish history. In response to this loss, they have forged a distinctive historiographical tradition using records now in English collections, as well as antiquarian transcripts and publications. Beginning with the work of Edmund Curtis in the 1920s, this tradition has sought to list, identify, and edit for publication replacement sources for records lost with the PROI for an Irish and international audience. More recently, scholars have made these collections digitally and publicly accessible worldwide with the CIRCLE and Beyond 2022 Projects at Trinity College Dublin. This article looks at how the lost records and a century of recovery efforts have shaped understandings of Ireland’s medieval past and its colonial relationship with England.
Effect of the contextual (community) level social trust on women’s empowerment: an instrumental variable analysis of 26 nations
Authors: Auchynnikava Alena , Habibov Nazim , Lyu Yunhong , Fan Lida 
Published: May 2024

AbstractThe purpose of this paper is to examine the effect of contextual (community) level social trust on women’s empowerment. The specific knowledge gap explored in this study is that the previous studies theorized that community trust has a positive impact on women’s empowerment. Thus, an increase in trust in the community will empower women. However, such an assumption has been never empirically tested and confirmed. Against this backdrop, the present paper develops a theoretical argument on why the increase in community trust should lead to a higher level of women empowerment. Then, a cross-country survey was used as a data source to test the effect of community trust on women’s empowerment. A traditional single-stage OLS and instrumental variable regressions are estimated to test the effect of community trust on women’s empowerment and quantify the magnitude of such impact. The key finding of this paper is that community trust indeed significantly strengthens the empowerment of women by increasing women’s ownership of assets and improving the decision-making authority of women in the family. Importantly, our findings are robust for the separate rural and urban samples, as well as the samples of younger and older women. Equally, our findings are robust for an alternative set of instruments. The main implication of these findings is that policymakers, social administrators, and government authorities who are working on promoting gender equality should give priority to promoting community-based interventions that nurture and maintain women’s trust.
Investigating the impact of spatial dependence and heterogeneity on airport relationships: Empirical evidence from China
Authors: Wu Zhen , Lai Po-Lin , Shang Kuo-Chung , Fang Mingjie 
Published: May 2024

AbstractThis research focused on the relationships among 34 major airports in China, analyzing how these relationships are influenced by spatial dependence and heterogeneity. Using a spatial econometric model, it found that passenger traffic in China’s airports displays a mutually driven aggregation effect. Furthermore, the study revealed that the airport relationship changes from complementarity to competition as the geographic distance between them decreases. The study also classified the main airports in China into three hierarchical levels and found significant complementarity and competition among those within the hub-and-spoke network structure. Specifically, this study identified a complementary relationship among regional trunk and local branch airports, as-well-as significant competition among hub airports. Crucially, the study suggests that the absence of a hub airport weakens the collaborative interactions between different types of airports, emphasizing the critical importance of hub airports for the connectivity and operational efficiency of China’s airport network.
Innovation rate and population structure moderate the effect of population size on cumulative technological culture
Authors: Bluet Alexandre , Osiurak François , Reynaud Emanuelle 
Published: May 2024

AbstractCumulative technological culture is defined as the increase in efficiency and complexity of tools and techniques over generations that allowed humans to conquer the whole Earth. While one part of the puzzling ability of humans to develop such a form of culture lies in their cognitive capacities giving rise to reliable transmission of information, another lies in the impact of demographic factors. Indeed, many studies have examined the impact of population size, innovation rate and population structure on cumulative technological culture. Here, we present a computational model based on a previous model of micro-society that we extended to study the impact of population size and the influence of innovations on cumulative technological culture. Our results showed that population size exhibits an influence on cumulative technological culture, principally in small-scale populations. Additionally, the model suggests that the innovation rate constrains cumulative technological culture and the importance of population size. Indeed, when innovations are frequent, the impact of population size is diminished. Furthermore, our results demonstrate that individuals rely more on themselves than on others to innovate in earlier generations as well as in small populations. However, when populations grow as well as in later stages of evolution, reliance on innovation from others increases. Overall, these results indicate that population size has a limited impact on cumulative technological culture and that other demographic factors such as innovation rate could offer a viable alternative explanation for archeological records.
Power, solidarity, and sajiao in dementia care
Authors: Lin Shumin 
Published: May 2024

Abstract
While scholars in the sociolinguistics of aging have shown that communication in eldercare is characterized by the predominance of infantilizing speech or elderspeak, sajiao, a self-infantilizing speech, has not been examined in this context. Further, current research on sajiao has focused primarily on young women. How sajiao is used in intergenerational communication involving adults and older adults is rarely examined. Drawing on two years of ethnography in two adult day centers in Taiwan, this paper examines the negotiation of power and solidarity through sajiao in dementia care. Sajiao is used for both task-oriented/transactional goals and interpersonal/relational goals and often serves multifunctional purposes to influence and to connect simultaneously. The intent and effect of sajiao as strategies of persuasion and influence (that is, power) and/or strategies of engagement and connection (that is, solidarity) is jointly constructed and negotiated. The multiple data sources of this longitudinal study—including ethnographic observations, interviews, and video-recordings—allow for richly contextualized interpretations of interactional episodes and reflective accounts, revealing a complex picture of power and solidarity negotiated through sajiao. This study contributes to research on eldercare communication by demonstrating the ambiguity and polysemy of discursive strategies in eldercare communication with regard to power and solidarity.
Polysemies and the one representation hypothesis
Authors: Vicente Agustín 
Published: May 2024

AbstractPolysemy has attracted much interdisciplinary interest in recent times. Recent discussions in psycholinguistics focus on the different processing profiles of polysemous and homonymous words, and on how to explain such different profiles. Much current research assumes that while homonymous meanings are stored in different lexical entries in the mental lexicon, polysemous senses relate to just one lexical representation, be this a list of senses or a core meaning formed by features common to all the different senses. However, there is growing skepticism towards such a one-representation hypothesis. After differentiating regular and irregular polysemies along several dimensions (not only in terms of sense representation, but also in terms of sources, acquisition and word class distribution), this paper argues that the variants of the one representation model can meet some of the challenges that have been raised. However, there are further challenges that have not yet been considered. On the one hand, nested polysemies (senses generated on the basis of iterations of metonymies or metaphors) put some pressure on the idea that senses of irregular polysemies share some set of features. On the other hand, sharing some features that could constitute a core meaning may not be sufficient for entering in co-activation patterns. In sum, while the paper defends the one-representation hypothesis in the light of recent skepticism, it also calls for further research and an eventual reformulation of the hypothesis.
“It’s like I got a new pair of glasses”
Authors: Müller Mareike 
Published: May 2024

Abstract
This study focuses on a specific group of sojourners that has thus far remained rather unexplored in the context of study-abroad research, namely, students with extensive prior experiences of living in, traveling to, and/or familial ties with target-language mediated communities. To this end, this study examines data obtained through episodic interviews with three American students, who grew up in close contact with German-speaking communities and studied abroad in Austria for four weeks. By means of thematic analysis, the pre-study abroad sojourn motives and reflections on sense of self, home, and belonging are contrasted with these students’ immediate and delayed post-study abroad accounts. The results shed light on both the challenges young adults grapple with due to their international biographies and the transformative effects students attribute to their short-term sojourns with regard to redefining who they are and what meaning different places of home and heritage have within their individual trajectories.
L2 interactional competence in a short-term service-learning and study abroad program
Authors: Koike Dale A. , Tocaimaza-Hatch Cecilia 
Published: May 2024

Abstract
This case study explores one Spanish L2 learner’s interactional competence (IC) during a short-term study abroad
program that featured service-learning (SL). The goal of the study is to describe the learner’s IC in interactions in the SL
context. Data for analysis derive primarily from dialogues between the focal participant and interlocutors from her SL network and
are analyzed qualitatively using Young’s (2019) categories of identity, linguistic, and
interactional resources. Key findings include: (a) the participant co-constructed identities as an American and a teacher with her
interlocutors; (b) use of linguistic resources suggests accommodation to Peninsular Spanish, possibly heightened by increased
contact with native speakers in SL; and (c) SL afforded a space where the learner felt confident trying out linguistic and
interactional features. Findings describe the participant’s IC and suggest the value of the SL context for meaningful interaction
in short-term study abroad programs.