bluuebunny/crossref_metadata_2025_split huggingface dataset:
Compositions of the Hercules–Aquila Cloud and Virgo Overdensity
Authors: Ye Dashuang , Du Cuihua , Deng Mingji , Liao Jiwei , Huang Yang , Shi Jianrong , Ma Jun 
Published: July 2024

ABSTRACT
Based on a sample of K giant from Large sky Area Multi-Object fibre Spectroscopic Telescope Data Release 8 and a sample of RR Lyrae (RRL) from Gaia Data Release 3, we investigate the compositions of the Hercules–Aquila Cloud (HAC) and Virgo Overdensity (VOD) and their collective contribution to the tilt and triaxiality of the stellar halo ($r\, \lt \, 40\, {\rm kpc}$) as well as two breaks at $\approx 15\, {\rm kpc}$ and 30 kpc. We apply the Gaussian mixture model to divide the stellar halo into the isotropic component and the radially biased anisotropic component, namely Gaia–Sausage–Enceladus (GSE), and find that both HAC and VOD are dominated by the GSE debris stars with weights of $0.67^{+0.09}_{-0.07}$ and $0.57^{+0.07}_{-0.06}$, respectively. In addition, using the K giants with orbital parameters, we identify the member stars of known substructures, including GSE, Sagittarius (Sgr), Helmi Streams, Sequoia, Thamnos, Pontus, Wukong, and Metal-weak Thick Disc, to probe the compositions of low-eccentricity stars in the HAC and VOD regions. In density fittings of the RRL sample, we note that the absence of HAC and VOD has a weak effect on the shape of halo. Finally, we find that the radially biased anisotropic halo contributes majorly to the stellar halo that can be modelled with a tilted triaxial ellipsoid and a doubly broken power law with breaking radii at $18.08^{+2.04}_{-3.22}\, {\rm kpc}$ and $33.03^{+1.30}_{-1.21}\, {\rm kpc}$. This has important significance for understanding the status of large diffuse overdensities in the Milky Way.
A detailed chemical study of the extreme velocity stars in the galaxy
Authors: Nelson Tyler , Hawkins Keith , Reggiani Henrique , Garza Diego , Wyse Rosemary F G , Woody Turner 
Published: July 2024

ABSTRACT
Two decades on, the study of hypervelocity stars is still in its infancy. These stars can provide novel constraints on the total mass of the Galaxy and its dark matter distribution. However how these stars are accelerated to such high velocities is unclear. Various proposed production mechanisms for these stars can be distinguished using chemo-dynamic tagging. The advent of Gaia and other large surveys have provided hundreds of candidate hyper velocity objects to target for ground-based high-resolution follow-up observations. We conduct high-resolution spectroscopic follow-up observations of 16 candidate late-type hyper velocity stars using the Apache Point Observatory and the McDonald Observatory. We derive atmospheric parameters and chemical abundances for these stars. We measure up to 22 elements, including the following nucleosynthetic families: $\alpha$ (Mg, Si, Ca, and Ti), light/odd-Z (Na, Al, V, Cu, and Sc), Fe-peak (Fe, Cr, Mn, Co, Ni, and Zn), and neutron capture (Sr, Y, Zr, Ba, La, Nd, and Eu). Our kinematic analysis shows one candidate is unbound, two are marginally bound, and the remainder are bound to the Galaxy. Finally, for the three unbound or marginally bound stars, we perform orbit integration to locate possible globular cluster or dwarf galaxy progenitors. We do not find any likely candidate systems for these stars and conclude that the unbound stars are likely from the the stellar halo, in agreement with the chemical results. The remaining bound stars are all chemically consistent with the stellar halo as well.
Formation of millisecond pulsars with wide orbits
Authors: Wang Bo , Liu Dongdong , Guo Yunlang , Chen Hailiang , Tang Wenshi , Li Luhan , Han Zhanwen 
Published: July 2024

ABSTRACT
Millisecond pulsars (MSPs) are a kind of radio pulsars with short spin periods, playing a key role in many aspects of stellar astrophysics. In recent years, some more MSPs with wide orbits ($\gt 30\, \rm d$) have been discovered, but their origin is still highly unclear. In this work, according to an adiabatic power-law assumption for the mass-transfer process, we carried out a large number of complete binary evolution computations for the formation of MSPs with wide orbits through the iron core-collapse supernova (CCSN) channel, in which a neutron star originating from a CCSN accretes matter from a red-giant star and spun up to millisecond periods. We found that this channel can form the observed MSPs with wide orbits in the range of $30\!-\!1200\, {\rm d}$, in which the white dwarf (WD) companions have masses in the range of $0.28\!-\!0.55\, \rm M_{\odot }$. We also found that almost all the observed MSPs can be reproduced by this channel in the WD companion mass versus orbital period diagram. We estimate that the Galactic numbers of the resulting MSPs from the CCSN channel are in the range of $\sim 4.8\!-\!8.5\times 10^{5}$. Compared with the accretion-induced collapse channel, the CCSN channel provides a main way to produce MSPs with wide orbits.
Continuum spectrum of atomic lithium in a magnetic field of white dwarfs
Authors: Zhao L B , Wang K D , Liu F L 
Published: July 2024

ABSTRACT
This paper reports on computational results of continuum spectra of atomic lithium in white-dwarf-strength magnetic fields. The adiabatic-basis-expansion method with R-matrix propagation has been used to study photoionization of magnetized alkali metal atoms. The R-matrix propagation technique and the two-dimensional matching scheme were utilized to obtain wavefunctions of the continuum states. Cross-sections of photoionization are calculated for lithium atoms in magnetic fields. Continuum spectra for its various bound-free transitions in magnetic white dwarf stars are presented as a function of field strengths ranging from 11.75 to 117.50 MG. Comparison is made between continuum spectra of diamagnetic hydrogen and lithium atoms. The comparison shows good agreement or remarkable difference for final continuum states with different symmetries in the photoionization processes concerned. A detailed analysis has been performed to understand the obtained results. The good agreement displayed manifests the reliability of the extended adiabatic-basis-expansion method. This method is suited to produce a large number of photoionization cross-section data for alkali metal atoms in a strong magnetic field, and therefore can serve as a tool to simulate continuum spectra observed in the atmospheres of magnetic white dwarfs with alkali metal atoms.
Strong nebular emissions associated with Mg ii absorptions detected in the SDSS spectra of background quasars
Authors: Guha Labanya Kumar , Srianand Raghunathan 
Published: July 2024

ABSTRACT
We present long-slit spectroscopic observations of 40 Galaxy On Top of Quasars (GOTOQs) at ${0.37 \leqslant z \leqslant 1.01}$ using the South African Large Telescope. Using this and available photometric data, we measure the impact parameters of the foreground galaxies to be in the range of 3–16 kpc with a median value of 8.6 kpc. This is the largest sample of galaxies producing Mg ii absorption at such low impact parameters. These quasar–galaxy pairs are ideal for probing the disc–halo interface. At such impact parameters, we do not find any anticorrelation between rest equivalent width (REW) of Ca ii, Mn ii, Fe ii, Mg ii, and Mg i absorption and impact parameter. These sight lines are typically redder than those of strong Mg ii absorbers, with the colour excess, E(B − V) for our sample ranging from −0.191 to 0.422, with a median value of 0.058. In the E(B − V) versus W3935 plane, GOTOQs occupy the same region as Ca ii absorbers. For a given E(B − V), we find larger W3935 than what has been found in the Milky Way, probably due to a smaller dust-to-gas ratio in GOTOQs. Galaxy parameters could be measured for twelve cases, and their properties seem to follow the trends found for strong Mg ii absorbers. Measuring the host galaxy properties for the full sample using HST photometry or AO-assisted ground-based imaging is important to gain insights into the relationship between the stellar mass of galaxies and the metal line REW distributions at low impact parameters.
On the northward shift of the heliospheric current sheet at the end of solar cycle 24
Authors: Li Huichao , Feng Xueshang 
Published: July 2024

ABSTRACT
Since solar cycle 16, the heliospheric current sheet (HCS) has been found to be shifted southward during the late declining to minimum phase. However, this trend is broken at the end of solar cycle 24. In this paper, we analyse the shift of the HCS by using information obtained from coronal model and in situ data provided by the near-Earth OMNI data base and the Parker Solar Probe (PSP). Coronal potential field source surface modelling results show that the northward shift is established at the beginning of 2018 and remains stable for about 2 yr. Interplanetary magnetic field data obtained from and within 1 au also support the northward shift, as the southern polarity T appears more frequently than the northern polarity A between 2018 and 2020. Both model results and in situ observation obtained by PSP imply that the HCS shift is established in the corona, and then propagates into the heliosphere. The quadrupole term still has a significant influence on the formation of the HCS shift.
1‐Deoxynojirimycin attenuates pathological markers of Alzheimer's disease in the in vitro model of neuronal insulin resistance
Authors: Parida Isabella Supardi , Takasu Soo , Ito Junya , Eitsuka Takahiro , Nakagawa Kiyotaka 
Published: July 2024

AbstractInsulin resistance, the hallmark of type 2 diabetes mellitus (T2DM), has emerged as a pathological feature in Alzheimer's disease (AD). Given the shared role of insulin resistance in T2DM and AD, repurposing peripheral insulin sensitizers is a promising strategy to preserve neuronal insulin sensitivity and prevent AD. 1‐Deoxynojirimycin (DNJ), a bioactive iminosugar, exhibited insulin‐sensitizing effects in metabolic tissues and was detected in brain tissue post‐oral intake. However, its impact on brain and neuronal insulin signaling has not been described. Here, we investigated the effect of DNJ treatment on insulin signaling and AD markers in insulin‐resistant human SK‐N‐SH neuroblastoma, a cellular model of neuronal insulin resistance. Our findings show that DNJ increased the expression of insulin signaling genes and the phosphorylation status of key molecules implicated in insulin resistance (Y1146‐pIRβ, S473‐pAKT, S9‐GSK3B) while also elevating the expression of glucose transporters Glut3 and Glut4, resulting in higher glucose uptake upon insulin stimuli. DNJ appeared to mitigate the insulin resistance‐driven increase in phosphorylated tau and Aβ1‐42 levels by promoting insulin‐induced phosphorylation of GSK3B (a major tau kinase) and enhancing mRNA expression of the insulin‐degrading enzyme (IDE) pivotal for insulin and Aβ clearance. Overall, our study unveils probable mechanisms underlying the potential benefits of DNJ for AD, wherein DNJ attenuates tau and amyloid pathologies by reversing neuronal insulin resistance. This provides a scientific basis for expanding the use of DNJ‐containing products for neuroprotective purposes and prompts further research into compounds with similar mechanisms of action.
Evaluation and management of febrile neutropenia in patients with cancer
Authors: Cossey Jason , Cote Mary Claire B. 
Published: July 2024

ABSTRACT
Febrile neutropenia is a common oncologic emergency that increases the risk for serious infection. This article reviews a joint American Society of Clinical Oncology and Infectious Diseases Society of America guideline for the evaluation and management of patients with cancer who present with fever and neutropenia. Knowledge and use of available risk assessment tools may reduce unnecessary hospitalizations, decrease inappropriate antibiotic use, and improve patient outcomes.
Mycoplasma genitalium's Antibiotic Resistance in Sexually Transmitted Infections Clinics in Israel
Authors: Azrad Maya , Saleh Nora , Zur Inbar Yorish , Becker Daniella , Shiloah Noga , Habib Sonia , Peretz Avi 
Published: July 2024

Objectives
To determine the prevalence of antibiotic resistance rate in Mycoplasma genitalium, and distribution of mutations associated with this resistance, among patients that attended sexually transmitted infections (STI) investigation clinics.

Materials and Methods
This cross-sectional study included M. genitalium-positive samples (urine, vaginal, rectal, and pharyngeal swabs) collected from 170 patients attending two STI investigation clinics, which were subjected to macrolide and quinolone resistance mutations analyses. Data regarding patient age, sex, and material/anatomical site of testing were collected.

Results
Macrolide-resistance mutations were identified in 48.8% of samples and were more common among males (p < .0001) and in rectal samples (p < .05). A2059C was the most prevalent macrolide-resistance mutation (18.2%). Quinolone resistance was detected in 23% of the samples, with S83I being the most common (17.1%) mutation. Rate of co-resistance to macrolides and quinolones was 21.2%.

Conclusions
The high rate of antibiotic resistance found in the current study, especially to macrolides, underscores the importance of antibiotic resistance monitoring in M. genitalium isolates in cases of persistent or recurrent urethritis/cervicitis, in cases of treatment failure and among specific populations. Such surveillance will improve treatment regimens and cure rates.
Susceptibility to social influence the mediating role of perceived risk and attitudes when considering a counterfeit purchase choice
Authors: Garas Sally Raouf Ragheb 
Published: July 2024

PurposeThe study aims to better understand the impact of susceptibility to social influence (normative and informational) on perceived risk and the consequent impacts on attitudes towards counterfeiting and intention to purchase counterfeit brands.Design/methodology/approachA single cross-sectional descriptive research was employed, and questionnaires were used to collect data from 361 counterfeit buyers. Structural equation modelling (SEM) based on partial least squares (PLS-SEM) was applied to analyse data and test the research hypotheses.FindingsResults showed that normative susceptibility to social influence significantly increased attitudes towards counterfeiting but not purchase intention; its impact on intention was mediated by perceived risk and attitudes. Although information susceptibility to social influence increased purchase intention, it had no significant impact on attitudes and perceived risk.Originality/valueThe current study empirically explores the relationship between susceptibility to social influence and perceived risk in the context of non-deceptive counterfeit consumption, by integrating the foundations of the theory of planned behaviour (TPB) and social cognitive theory (SCT).
Piercing the corporate veil in Mauritius: a comparative study with the United Kingdom
Authors: Mahadew Bhavna 
Published: July 2024

Purpose
The purpose of this paper is to bring clarity to the concept of piercing the veil of incorporation in Mauritius. This will allow students, researchers, academics and practitioners to engage further in research on the topic of incorporation of companies.

Design/methodology/approach
To conduct the study, the doctrinal legal research approach will be used. The inquiry will examine the numerous laws and case laws that permit the lifting of the corporate veil, so exposing the agents of the corporation to accountability on both a criminal and civil level. A comparison of Mauritius and the UK legal systems will be conducted to assess the efficacy of the former.

Findings
There are significant loopholes in the legislative framework of Mauritius regarding various corporate offences that are highly encouraged because of the limited circumstances under which courts may lift the corporate veil. There is a need for specific legislation to be enacted by Parliament to address these specific offences. Inspiration should be drawn from the UK’s robust legislative framework on the matter.

Originality/value
Literature on the subject in Mauritius deals mostly with factual information on the doctrine of separate legal personality and the various exceptions under which the veil of incorporation may be lifted. However, there is a scarcity of research on the various fraudulent activities and their implications on the company that go unnoticed and unpunished because of loopholes in the legal framework. This paper attempts to fill this important gap.
Employee readiness for change: examining the combined effects of individual and organizational demands in public school reform
Authors: Kalbermatten Cyrill Julian 
Published: July 2024

PurposeThe paper aims to clarify how work-specific characteristics at both the individual and organizational level influence professional civil servants’ readiness for change during the implementation of reforms in public administration. We examine the influence of work characteristics at the individual and organizational levels, such as reform-related strains, organizational climate, and organizational professionalism, on the employees’ response to change. In addition, we also consider the interaction between these specific work characteristics.Design/methodology/approachThis article employs a quantitative multi-level analysis to examine the influence of individual and collective predictors of employees' readiness for change. For our analysis, we used data from the evaluation of a school reform in Switzerland aimed at aligning teachers' working conditions with those of other administrative employees. The survey conducted for the evaluation includes responses from 2,162 teachers.FindingsOur study expands the understanding in public management research of work characteristics that either promote or reduce employees’ readiness for change in the public sector. Our findings suggest that the organizational level, in our case the school level, influences the individual’s response to change. Furthermore, the role of organizational professionalism in terms of a reform-related transformation of the identities, structures, and practices of the actors concerned is highlighted as a potential stressor and catalyst that reinforces the negative correlation between reform-related stress and willingness to change.Practical implicationsThis paper offers insights into how public managers can effectively overcome challenges in the implementation process of public school reforms. This also includes the awareness among change agents that positively associated changes at the organizational level may have negative consequences at the individual level, due to the fact that they affect professional understanding, for example, which may cause the affected actors to respond with resistance.Originality/valueThis paper contributes to the small number of multi-level research studies on the responses to change in public administration and answers the call for research to investigate the hurdles that may arise when implementing change. Further, the paper contributes to the literature on the impact of new public management (NPM) on the identity of professional civil servants.
Converting and evolving a subject heading list into a thesaurus
Authors: Guaglianone Maria Teresa , Aracri Giovanna , Taverniti Maria 
Published: July 2024

PurposeThe objective of this paper is to describe the evolution of the available subject heading list, i.e. the CC Soggettario (Carabinieri Corps Soggettario), towards a thesaurus, that is CCThes (Carabinieri Corps Thesaurus), to support subject indexing and retrieval of the documentary heritage held by the Historical Office of the General Command of the Carabinieri Corps. This work follows the need to implement a controlled vocabulary compliant with the state-of-the-art standards.Design/methodology/approachThe methodology implements the practice of reengineering available vocabularies, following standardised guidelines for thesaurus development. The conversion process includes the balance maintenance of what has been achieved in the CC Soggettario and the enrichment of the semantic structure in the thesaurus by using both deductive and inductive methods.FindingsThe main result of this study is a thesaurus compliant with ISO 29964-1:2011 recommendations, which improves information retrieval performances and interoperability with other vocabularies and applications. It generally has a mono-hierarchical structure with the possibility of admitting, as an exception, the poly-hierarchy for a few concepts. An introductive user guide has been created as a complementary tool to the CCThes.Originality/valueThis is an applied study which deals with Knowledge Organisation System (KOS) reengineering and outlines this process using a pragmatic approach. The paper strength lies in providing the description of performed activities and conveying a set of resources to approach KOS reengineering practice. The study is also relevant for the preservation and diffusion of a part of the social memory and identity of Italy.
Investigating surfaces, geometry and degree of fusion of tracks printed using fused deposition modelling to optimise process parameters for polymeric materials at meso-scale
Authors: Mwania Fredrick , Maringa Maina , Nsengimana Joseph , van der Walt Jacobus Gert 
Published: July 2024

Purpose
The current analysis was conducted to investigate the quality of surfaces and geometry of tracks printed using PolyMideTM CoPA, PolymaxTM PC and PolyMideTM PA6-CF materials through fused deposition modelling (FDM). This study also examined the degree of fusion of adjacent filaments (tracks) to approximate the optimal process parameters of the three materials.

Design/methodology/approach
Images of fused adjacent filaments were acquired using scanning electron microscopy (SEM), after which, they were analysed using Image J Software and Minitab Software to determine the optimal process parameters.

Findings
The optimal process parameters for PolyMideTM CoPA are 0.25 mm, 40 mm/s, −0.10 mm, 255°C and 0.50 mm for layer thickness, printing speed, hatch spacing, extrusion temperature and extrusion width, respectively. It was also concluded that the optimal process parameters for PolymaxTM PC are 0.30 mm, 40 mm/s, 0.00 mm, 260°C and 0.6 mm for layer thickness, printing speed, hatch spacing, extrusion temperature and extrusion width, respectively.

Research limitations/implications
It was difficult to separate tracks printed using PolyMideTM PA6-CF from the support structure, making it impossible to examine and determine their degree of fusion using SEM.

Social implications
The study provides more knowledge on FDM, which is one of the leading additive manufacturing technology for polymers. The information provided in this study helps in continued uptake of the technique, which can help create job opportunities, especially among the youth and young engineers.

Originality/value
This study proposes a new and a more accurate method for optimising process parameters of FDM at meso-scale level.