bluuebunny/crossref_metadata_2025_split huggingface dataset:
Interpretable linear dimensionality reduction based on bias-variance analysis
Authors: Bonetti Paolo , Metelli Alberto Maria , Restelli Marcello 
Published: March 2024

AbstractOne of the central issues of several machine learning applications on real data is the choice of the input features. Ideally, the designer should select a small number of the relevant, nonredundant features to preserve the complete information contained in the original dataset, with little collinearity among features. This procedure helps mitigate problems like overfitting and the curse of dimensionality, which arise when dealing with high-dimensional problems. On the other hand, it is not desirable to simply discard some features, since they may still contain information that can be exploited to improve results. Instead, dimensionality reduction techniques are designed to limit the number of features in a dataset by projecting them into a lower dimensional space, possibly considering all the original features. However, the projected features resulting from the application of dimensionality reduction techniques are usually difficult to interpret. In this paper, we seek to design a principled dimensionality reduction approach that maintains the interpretability of the resulting features. Specifically, we propose a bias-variance analysis for linear models and we leverage these theoretical results to design an algorithm, Linear Correlated Features Aggregation (LinCFA), which aggregates groups of continuous features with their average if their correlation is “sufficiently large”. In this way, all features are considered, the dimensionality is reduced and the interpretability is preserved. Finally, we provide numerical validations of the proposed algorithm both on synthetic datasets to confirm the theoretical results and on real datasets to show some promising applications.
Postbellum electoral politics in California and the genesis of the Chinese exclusion act of 1882
Authors: Geloso Vincent , Peng Linan 
Published: March 2024

AbstractWhy did the United States move from having nearly open borders from the 1840s to the 1870s to passing the Chinese Exclusion Act in 1882, the first law in American history to ban people from entering the United States solely based on race? We argue that the standard story of nativist backlash based on wage pressure explains the demand for immigration restrictions, but not their timing or their racial focus. The demand for immigration restrictions was largely inchoate until the political restructuring that followed the Civil War. Finding themselves uncompetitive in much of the country, the Democrats seized on immigration restrictions, most notably in growing California, as a wedge issue. Chinese residents were unable to vote, thus making restrictions on Chinese entry an especially effective strategy in political economy.
Carceral Time at Port Arthur and the Tasman Peninsula: An Archaeological View of the Mechanisms of Convict Time Management in a Nineteenth Century Penal Landscape
Authors: Gibbs Martin , Tuffin Richard 
Published: March 2024

AbstractBetween 1833 and 1877 the Tasman Peninsula (Van Diemens Land/Tasmania) operated as a restricted penal zone for British convicts transported to Australia. The main penal settlement was situated at Port Arthur, with a series of substations spread across an area of 660 km2 (250 mi2). At its mid-1840s peak over 3,000 male convicts, military, and free resided on the peninsula. The vast majority of the men were engaged in diverse industrial activities, ranging from manufacturing to resource extraction, as well as the associated tasks of transport and communications. Archaeological and historical evidence demonstrates that this multiscalar penological industrial landscape was coordinated by an interlinked system of audio and visual signaling. Activity within settlements and the immediate economic hinterland was synchronized by bells, while more distant or topographically difficult sites incorporated visual signaling with time balls and semaphores. A GIS analysis of soundscapes and viewsheds shows that the latter afforded coordination of labor across the hinterland, as well as rapid complex messaging between different stations and beyond, while also spreading a net of time compliance and surveillance across the penal peninsula.
Porous Mg–Zn–Ca scaffolds for bone repair: a study on microstructure, mechanical properties and in vitro degradation behavior
Authors: Huo Lei , Li Qiang , Jiang Linlin , Jiang Huiqin , Zhao Jianping , Yang Kangjian , Dong Qiangsheng , Shao Yi , Chu Chenglin , Xue Feng , Bai Jing 
Published: March 2024

AbstractBiodegradable porous Mg scaffolds are a promising approach to bone repair. In this work, 3D-spherical porous Mg–1.5Zn–0.2Ca (wt.%) scaffolds were prepared by vacuum infiltration casting technology, and MgF2 and fluorapatite coatings were designed to control the degradation behavior of Mg-based scaffolds. The results showed that the pores in Mg-based scaffolds were composed of the main spherical pores (450–600 μm) and interconnected pores (150–200 μm), and the porosity was up to 74.97%. Mg-based porous scaffolds exhibited sufficient mechanical properties with a compressive yield strength of about 4.04 MPa and elastic modulus of appropriately 0.23 GPa. Besides, both MgF2 coating and fluorapatite coating could effectively improve the corrosion resistance of porous Mg-based scaffolds. In conclusion, this research would provide data support and theoretical guidance for the application of biodegradable porous Mg-based scaffolds in bone tissue engineering.
Graphical Abstract
Attitudes to End-of-Life Care and Voluntary Assisted Dying Amongst Members of the Australian Jewish community
Authors: Janover Eli W. , La Brooy Camille , Philip Jennifer , Lewis Sophie , Kerridge Ian , Komesaroff Paul A. 
Published: March 2024

Abstract
The implementation of voluntary assisted dying (VAD) in the Australian State of Victoria in 2019 has stimulated discussions about end-of-life care and dying in many communities. Various attempts have been made to represent the attitudes of the Jewish community, a distinct culturally and linguistically diverse (CALD) group, in terms that suggest a unified set of opinions that opposes VAD policies. This research aimed to explore attitudes to VAD in the context of end-of-life care held by members of the Victorian Jewish community. A descriptive qualitative methodological design was employed. Ten Victorians who identify as Jewish were recruited and participated in in-depth, semi-structured interviews. Reflexive thematic analysis was carried out on the transcripts to identify key themes, attitudes and preferences in relation to end-of-life care, death and dying, and VAD. Three themes were identified: “complexity and variation”, “similarities”, and “factors influencing attitudes to VAD and end-of-life care”. A significant degree of diversity was apparent, ranging from highly supportive of VAD to advocacy for a total repeal of the policy. The results indicate that images of how Victorian Jewish individuals feel towards VAD based on essentialised notions about the community and belief systems are not supported by the evidence. In reality, considerable diversity of attitudes exists towards VAD and end-of-life care. We conclude that it is important that policymakers and members of the broader society avoid stereotypes that falsely characterise this specific community and, by implication, other CALD groups, particularly in terms that ignore internal diversity regarding belief systems, social attitudes and ethical perspectives.
Integrability of $$ \Phi ^4$$ matrix model as N-body harmonic oscillator system
Authors: Grosse Harald , Sako Akifumi 
Published: March 2024

AbstractWe study a Hermitian matrix model with a kinetic term given by $$ Tr (H \Phi ^2 )$$

T
r
(
H

Φ
2

)

, where H is a positive definite Hermitian matrix, similar as in the Kontsevich Matrix model, but with its potential $$\Phi ^3$$

Φ
3

replaced by $$\Phi ^4$$

Φ
4

. We show that its partition function solves an integrable Schrödinger-type equation for a non-interacting N-body Harmonic oscillator system.
Identifying patients in need of psychological treatment with language representation models
Authors: Aygün İrfan , Kaya Buket , Kaya Mehmet 
Published: March 2024

Abstract
Early diagnosis of psychological disorders is very important for patients to regain their health. Research shows that many patients do not realize that they have a psychological disorder or apply to different departments for treatment. The detection of hidden psychological disorders in patients will both increase the quality of life of patients and reduce the traffic of patients who apply to the wrong department. This study aimed to determine whether patients who consult a physician for any reason need psychological treatment. For this purpose, the relationships, and similarities between the sentences of previous psychiatric patients and the sentences of newly arrived patients were analyzed. Domain-based trained ELECTRA language model was used to detect sentence similarities semantically. In the study, the dialogues of patients with physicians in 92 different specialties were analyzed using the MedDialog dataset, which consists of online physician applications, and the DAIC-WOZ dataset. As a result of the experiments, 90.49% success was achieved for the MedDialog dataset and 89.36% for the DAIC-WOZ dataset. With the proposed model, patients in need of psychological treatment were identified and the medical departments where psychological problems were revealed the most were determined. These divisions are Neurology, Sexology, Cardiology, and Plastic Surgery, respectively. With the findings obtained, complications caused by psychological problems and types of diseases that are precursors to psychological disorders were determined. To the best of our knowledge, this article is the first study that aims to analyze all psychological illness instead of focusing on any of the psychological problems (depression, OCD, schizophrenia, etc.) and validated by electronic health records.
Heterogeneity in PhD entrepreneurship: strategic alignment of institutional, organisational, and individual factors
Authors: Muscio Alessandro , Kitagawa Fumi 
Published: March 2024

Abstract
Much of the existing research on PhD entrepreneurship is focused on Academic Spin-Offs (ASOs) within the parent institution’s formal intellectual property (IP) structure. Cross-level analysis of a survey administered to 23,500 PhD students in Italy shows the heterogeneity of PhD students’ entrepreneurial activities, which, in addition to ASOs, include start-ups, corporate spin-offs and other types of businesses. We examine the types of drivers that matter most for different forms of PhD entrepreneurial ventures. Our findings reveal two forces at play: a technology-push model where PhD students rely on IP and support from the parent university, and a demand-led model that involves support from industry and sources of external finance. This study highlights the strategic alignment among the determinants of PhD entrepreneurship at the micro, meso and macro levels. These determinants include the individual PhD student’s choices, the interactions with different stakeholders and reconciliation of the tensions represented by the organizational and institutional resources and infrastructures.
Experiencing Intimate Relationships and Sexuality: A Qualitative Study with Autistic Adolescents and Adults
Authors: Beato Ana , Sarmento Mariana Reis , Correia Mariana 
Published: March 2024

AbstractRomance, intimacy, and sexuality are crucial elements of human well-being. However, they have gone unnoticed and insufficiently explored among individuals with neurodevelopmental difficulties, namely among autistic people. Autism Spectrum Disorder (ASD) is a neurodevelopmental disability characterized by repetitive and stereotypical behavior, interests, or activities and by difficulties in interpersonal relationships and verbal and non-verbal communication. Preliminary studies reveal that, although most wish to relate intimately with other people, several autistic individuals tend to isolate themselves and engage in individual sexual behaviors. Despite the importance of this topic, few studies have looked at it in depth nor included the unique perceptions of autistic people about topics such as romantic and intimate relationships or sexuality. To fill that gap, we have designed a qualitative, cross-sectional and exploratory study that sought to explore the perceptions and experiences of autistic people about romance, intimacy and sexuality. Twenty-two autistic teenagers and adults (63.6% female) aged between 15 and 45 years, consented to participate in individual in-depth, semi-structured interviews. The transcripts were examined with thematic analysis. The results highlight three main themes: Intimate relationships, sexuality, and sex education. The negative impact of autistic characteristics in sexuality and sexuality was highlighted by the participants. Understanding the difficulties and the needs of autistic people will increase awareness regarding this topic and improve assessment and interventions related to romantic relationships and sexuality. Furthermore, our study sheds light on the importance of developing tailored and adequate sex education programs and tools for the difficulties presented by autistic youth.
Enhanced benzene vapor adsorption through microwave-assisted fabrication of activated carbon from peanut shells using ZnCl2 as an activating agent
Authors: Kutluay Sinan , Şahin Ömer , Baytar Orhan 
Published: March 2024

AbstractHerein, microwave-assisted activated carbon (MW-AC) was fabricated from peanut shells using a ZnCl2 activator and utilized for the first time to eliminate benzene vapor as a volatile organic compound (VOC). During the MW-AC production process, which involved two steps—microwave treatment and muffle furnace heating—we investigated the effects of various factors and achieved the highest iodine number of 1250 mg/g. This was achieved under optimal operating conditions, which included a 100% impregnation ratio, CO2 as the gas in the microwave environment, a microwave power set at 500 W, a microwave duration of 10 min, an activation temperature of 500 °C and an activation time of 45 min. The structural and morphological properties of the optimized MW-AC were assessed through SEM, FTIR, and BET analysis. The dynamic adsorption process of benzene on the optimized MW-AC adsorbent, which has a significant BET surface area of 1204.90 m2/g, was designed using the Box-Behnken approach within the response surface methodology. Under optimal experimental conditions, including a contact duration of 80 min, an inlet concentration of 18 ppm, and a temperature of 26 °C, the maximum adsorption capacity reached was 568.34 mg/g. The experimental data are better described by the pseudo-second-order kinetic model, while it is concluded that the equilibrium data are better described by the Langmuir isotherm model. MW-AC exhibited a reuse efficiency of 86.54% for benzene vapor after five consecutive recycling processes. The motivation of the study highlights the high adsorption capacity and superior reuse efficiency of MW-AC adsorbent with high BET surface area against benzene pollutant. According to our results, the developed MW-AC presents itself as a promising adsorbent candidate for the treatment of VOCs in various industrial applications.
Equilibrium population dynamics of site-dependent species
Authors: Law Peter R. 
Published: March 2024

AbstractAdults of site-dependent species require a discrete structure, e.g., a cavity, for breeding, which they are unable to construct and must locate and occupy. The environment provides only a limited number of such sites, which may vary in overall quality due to their environmental context. Heterogeneity of site quality can result in population equilibrium, often construed as source-sink dynamics. Rodenhouse et al. (Ecology 78:2025-2042, 1997) proposed a mechanism of site-dependent equilibrium that they claimed was more general than source-sink dynamics. After defining notions of source and sink, I use explicit dynamical models for a site-dependent population, based on the life history of golden eagles (Aquila chrysaetos), with two levels of site quality, to investigate the existence of population equilibria under several scenarios: source-source, source-sink, and source-floater. The life history traits I employ are not overly restrictive and serve the purpose only of providing models explicit enough to be treated analytically. I use a generalized notion of “golden eagle” since site dependency is often discussed in the literature on raptors, and I have exploited details from Hunt et al. (PLoS ONE 12:e0172232, 2017) for numerical simulations. The crucial features of the modeling, however, are those of site dependency. The modeling emphasizes that equilibrium results from the limited supply of source sites and that vital rates averaged across site qualities do not provide a compelling explanation of equilibria, contra Rodenhouse et al. Counterintuitively, equilibria are theoretically possible, even when both site qualities are intrinsically source sites.
Challenges and Risk Factors of Early Leaving from IVET: Perceptions of Students and Schools´ Staff
Authors: Bentsalo Inna , Loogma Krista , Ümarik Meril , Väljataga Terje 
Published: March 2024

AbstractA concern across many vocational education systems is the high dropout rate from their programs. This problem is likely to be exacerbated at time of low unemployment rates when employers are less demanding about the certification of skills at the time of employment. This qualitative study examines the factors associated with students leaving early from Initial Vocational Education and Training (IVET) institutions in Estonia. The study analyses the challenges and potential risk factors of IVET early leaving from both the students and staff members points of view. The research participants were 20 Estonian IVET students and 12 staff members from various vocational schools. The study highlights the complex interplay of students’ challenges and emphasises the importance of addressing them to promote retention and success in vocational education and training programmes. The study employs the Self-Determination Theory, more specifically, the conceptual frame of basic psychological needs to interpret the data. The results of the research indicate that students at risk are mainly shaped by their primary school experience prior to vocational school, with teachers and peers as the main influencers.
The Covariance Metric in the Blaschke Locus
Authors: Dai Xian , Eptaminitakis Nikolas 
Published: March 2024

AbstractWe prove that the Blaschke locus has the structure of a finite dimensional smooth manifold away from the Teichmüller space and study its Riemannian manifold structure with respect to the covariance metric introduced by Guillarmou, Knieper and Lefeuvre in Guillarmou et al. in (Ergod Theory Dyn Syst 43:974–1022, 2021). We also identify some families of geodesics in the Blaschke locus arising from Hitchin representations for orbifolds and show that they have infinite length with respect to the covariance metric.
Killing Fields on Compact Pseudo-Kähler Manifolds
Authors: Derdzinski Andrzej , Terek Ivo 
Published: March 2024

AbstractWe show that a Killing field on a compact pseudo-Kähler ddbar manifold is necessarily (real) holomorphic. Our argument works without the ddbar assumption in real dimension four. The claim about holomorphicity of Killing fields on compact pseudo-Kähler manifolds appears in a 2012 paper by Yamada, and in an appendix we provide a detailed explanation of why we believe that Yamada’s argument is incomplete.
Gamma-delta T-cell acute lymphoblastic lymphoma/leukemia: a report of a rare entity
Authors: George Giby V. , Kajstura Maggie , Evans Andrew G. , Syposs Chauncey R. 
Published: March 2024

AbstractGamma delta (γδ) T-cell acute lymphoblastic leukemia/lymphoma (T-ALL) is a rare, aggressive subtype of T-lymphoid leukemia that accounts for only 9–12% of all T-ALL cases. Herein, we report the case of an 8-year-old boy who presented with facial swelling, shortness of breath, and progressive cervical and axillary lymphadenopathy. Pathological examination, flow cytometry (Navios, Beckman Coulter ClearLLab 10C 10-color T-cell panel [containing FITC-labeled TCR γδ antibody]), chromosomal analysis, interphase FISH, and targeted DNA-based NGS (34-gene Illumina TruSeq Myeloid Panel) were performed. Flow cytometry evaluation of a lymph node biopsy specimen revealed an immature T-cell population positive for CD4, CD3, CD2 (subset positive), CD5, CD7, CD38, CD1a, cytoplasmic terminal deoxynucleotidyl transferase (cyto-TdT), CD30 (subset positive), and T-cell receptor (TCR) gamma delta (γδ). Microscopic examination of an enlarged lymph node and bone marrow showed involvement by a dense, diffuse, neoplastic infiltrate. Interphase FISH revealed a copy number loss of PDGFRB (5q32) in 90.5% of interphase nuclei. Targeted DNA-based NGS detected a tier II oncogenic variant in NOTCH1 (c.7375C > T, p.Gln2459Ter) at a VAF of 21%. This case of γδ T-ALL highlights a rare entity and adds to the literature, albeit scant, which may aid in better recognition and classification.
Calcium polystyrene sulfonate-induced rectal ulcer causing E. coli native-valve infective endocarditis
Authors: Fukushima Shinnosuke , Hagiya Hideharu , Honda Hiroyuki , Ishida Tomoharu , Shoji Ryohei , Hasegawa Kou , Otsuka Fumio 
Published: March 2024

AbstractEscherichia coli-associated native-valve infective endocarditis is a rare disease that affects elderly patients with underlying risk factors such as diabetes mellitus, malignancy, and renal failure. Long-term use of calcium polystyrene sulfonate is a potential risk factor for gastrointestinal mucosal damage or even colorectal ulcers. Herein, we describe a fatal case of a 66-year-old Japanese man with diabetes mellitus and renal failure who was prescribed calcium polystyrene sulfonate (CPS) for 11 years and developed a CPS-induced rectal ulcer, leading to E. coli native-valve infective endocarditis. The patient was admitted to our hospital due to acute-onset impaired consciousness. As a result of the systemic investigation, he was diagnosed with E. coli bacteremia accompanied by multiple cerebral infarctions and an acute hemorrhagic rectal ulcer. Transesophageal echocardiography revealed a 20-mm vegetative structure on the mitral valve, resulting in a final diagnosis of E. coli-associated infective endocarditis. After rectal resection, mitral valve replacement surgery was performed; however, the patient died shortly after surgery. Pathological findings of the resected rectum showed deposition of a basophilic crystalline material suggesting the presence of CPS. Our case highlights the potential risk of colorectal ulcers in a long-term CPS user, which can trigger bacterial translocation and endocarditis as fatal complications.