bluuebunny/crossref_metadata_2025_split huggingface dataset:
Transversals to Colorful Intersecting Convex Sets
Authors: Gomez-Navarro Cuauhtemoc , Roldán-Pensado Edgardo 
Published: June 2024

AbstractLet K be a compact convex set in $$\mathbb {R}^{2}$$

R

2

and let $$\mathcal {F}_{1}, \mathcal {F}_{2}, \mathcal {F}_{3}$$

F
1

,

F
2

,

F
3

be finite families of translates of K such that $$A \cap B \ne \emptyset $$

A
∩
B
≠
∅

for every $$A \in \mathcal {F}_{i}$$

A
∈

F
i

and $$B \in \mathcal {F}_{j}$$

B
∈

F
j

with $$i \ne j$$

i
≠
j

. A conjecture by Dol’nikov is that, under these conditions, there is always some $$j \in \{ 1,2,3 \}$$

j
∈
{
1
,
2
,
3
}

such that $$\mathcal {F}_{j}$$

F
j

can be pierced by 3 points. In this paper we prove a stronger version of this conjecture when K is a body of constant width or when it is close in Banach-Mazur distance to a disk. We also show that the conjecture is true with 8 piercing points instead of 3. Along the way we prove more general statements both in the plane and in higher dimensions. A related result was given by Martínez-Sandoval, Roldán-Pensado and Rubin. They showed that if $$\mathcal {F}_{1}, \dots , \mathcal {F}_{d}$$

F
1

,
⋯
,

F
d

are finite families of convex sets in $$\mathbb {R}^{d}$$

R

d

such that for every choice of sets $$C_{1} \in \mathcal {F}_{1}, \dots , C_{d} \in \mathcal {F}_{d}$$

C
1

∈

F
1

,
⋯
,

C
d

∈

F
d

the intersection $$\bigcap _{i=1}^{d} {C_{i}}$$

⋂

i
=
1

d

C
i

is non-empty, then either there exists $$j \in \{ 1,2, \dots , n \}$$

j
∈
{
1
,
2
,
⋯
,
n
}

such that $$\mathcal {F}_j$$

F
j

can be pierced by few points or $$\bigcup _{i=1}^{n} \mathcal {F}_{i}$$

⋃

i
=
1

n

F
i

can be crossed by few lines. We give optimal values for the number of piercing points and crossing lines needed when $$d=2$$

d
=
2

and also consider the problem restricted to special families of convex sets.
Validity of a fast automated 3d spine reconstruction measurements for biplanar radiographs: SOSORT 2024 award winner
Authors: Chen Weiying , Khodaei Mahdieh , Reformat Marek , Lou Edmond 
Published: June 2024

Abstract
Purpose
To validate a fast 3D biplanar spinal radiograph reconstruction method with automatic extract curvature parameters using artificial intelligence (AI).

Methods
Three-hundred eighty paired, posteroanterior and lateral, radiographs from the EOS X-ray system of children with adolescent idiopathic scoliosis were randomly selected from the database. For the AI model development, 304 paired images were used for training; 76 pairs were employed for testing. The validation was evaluated by comparing curvature parameters, including Cobb angles (CA), apical axial vertebral rotation (AVR), kyphotic angle (T1–T12 KA), and lordotic angle (L1–L5 LA), to manual measurements from a rater with 8 years of scoliosis experience. The mean absolute differences ± standard deviation (MAD ± SD), the percentage of measurements within the clinically acceptable errors, the standard error of measurement (SEM), and the inter-method intraclass correlation coefficient ICC[2,1] were calculated. The average reconstruction speed of the 76 test images was recorded.

Results
Among the 76 test images, 134 and 128 CA were exported automatically and measured manually, respectively. The MAD ± SD for CA, AVR at apex, KA, and LA were 3.3° ± 3.5°, 1.5° ± 1.5°, 3.3° ± 2.6° and 3.5° ± 2.5°, respectively, and 98% of these measurements were within the clinical acceptance errors. The SEMs and the ICC[2,1] for the compared parameters were all less than 0.7° and > 0.94, respectively. The average time to display the 3D spine and report the measurements was 5.2 ± 1.3 s.

Conclusion
The developed AI algorithm could reconstruct a 3D scoliotic spine within 6 s, and the automatic curvature parameters were accurately and reliably extracted from the reconstructed images.
Secant Modulus Method: A Simplified Technique for Measuring in Situ Stresses in Rocks
Authors: Ali Zulfiqar , Karakus Murat , Nguyen Giang D. , Amrouch Khalid 
Published: June 2024

AbstractThe core of sustainable mining is the preservation of the ground stability, and in situ stress measurement is crucial as most of the stability issues are directly associated with the in situ and induced stresses. Deformation rate analysis and acoustic emission are reliable and low-cost methods of stress measurement leveraging stress memory in rocks. However, owing to rock heterogeneity and complex geological stress history, the accurate determination of in situ stresses is often challenging. This study proposes a simple, accurate, and improved method for determining the in situ stresses in rocks called the Secant Modulus Method (SMM). The effectiveness of SMM is determined through uniaxial cyclic loading and unloading experiments on different types of soft and hard crystalline rocks. The influence of the loading modes, strain rates, and time delay is also investigated. Additionally, its utility for in situ stress measurement is explored. The SMM method proved effective in determining both applied and in-situ stresses, with no effect from variations in loading conditions, loading rates, and time delays. Moreover, the in situ stresses measured using the SMM were in good agreement with the overcoring method.
Comprehensive analysis of clinical outcomes, infectious complications and microbiological data in newly diagnosed multiple myeloma patients: a retrospective observational study of 92 subjects
Authors: Desantis Vanessa , Borrelli Paola , Panebianco Teresa , Fusillo Antonio , Bochicchio Donatello , Solito Angelo , Pappagallo Fabrizio , Mascolo Antonella , Ancona Anna , Cicco Sebastiano , Cerchione Claudio , Romano Alessandra , Montagnani Monica , Ria Roberto , Vacca Angelo , Solimando Antonio Giovanni 
Published: June 2024

AbstractPatients with multiple myeloma (MM) have an increased risk of sepsis due to underlying disease- and treatment-related immunosuppression. However, data on sepsis incidence, causative pathogens, and impact on outcomes in newly diagnosed MM (NDMM) are limited. We conducted a retrospective observational study of 92 NDMM patients who developed sepsis between 2022 and 2023 at a tertiary care center in Italy. Patient characteristics, sepsis criteria [Quick Sequential Organ Failure Assessment, Systemic Inflammatory Response Syndrome (SIRS)], microbiology results, and associations with progression-free survival (PFS) were analyzed. In this cohort of 92 critically-ill patients, pathogenic organisms were identified via microbiological culture in 74 cases. However, among the remaining 18 culture-negative patients, 9 exhibited a SIRS score of 2 and another 9 had a SIRS score of 4, suggestive of a clinical presentation consistent with sepsis despite negative cultures. Common comorbidities included renal failure (60%), anemia (71%), and bone disease (83%). Gram-negative (28%) and Gram-positive (23%) bacteria were frequent causative organisms, along with fungi (20%). Cox Univariate analyses for PFS showed statically significant HR in patients with albumin ≥ 3.5 vs < 3.5 (HR = 5.04, p < 0.001), Karnofsky performance status ≥ 80 vs < 80 (HR = 2.01, p = 0.002), and early-stage vs late-stage disease by International Staging System (HR = 4.76 and HR = 12.52, both p < 0.001) and Revised International Staging System (R-ISS III vs R-ISS I, HR = 7.38, p < 0.001). Sepsis is common in NDMM and associated with poor outcomes. Risk stratification incorporating sepsis severity, comorbidities, and disease stage may help guide preventive strategies and optimize MM management.
Extension of the Directed Search Domain algorithm for multi-objective optimization to higher dimensions
Authors: Yu Boxi , Utyuzhnikov Sergey 
Published: June 2024

AbstractThis paper addresses the problem of generating an evenly distributed set of Pareto solutions. It appears in real-life applications related to multi-objective optimization when it is important to represent the entire Pareto front with a minimal cost. There exist only a few algorithms which are able to tackle this problem in a general formulation. The Directed Search Domain (DSD) algorithm has proved to be efficient and quite universal. It has successfully been applied to different challengeable test cases. In this paper for the first time the DSD approach is systematically extended and applied to problems with higher dimensions. The modified algorithm does not have any formal limitation on the number of objective functions that is important for practical applications. The efficacy of the algorithm is demonstrated on a number of test cases.
‘Emancipation’ in Digital Nomadism vs in the Nation-State: A Comparative Analysis of Idealtypes
Authors: Wang Blair , Schlagwein Daniel , Cecez-Kecmanovic Dubravka , Cahalane Michael C. 
Published: June 2024

AbstractAcademic and public debate is continuing about whether digital nomadism, a new Internet-enabled phenomenon in which digital workers adopt a neo-nomadic global lifestyle, represents ‘real’ emancipation for knowledge workers—or if it is, instead, the opposite. Based on a field study of digital nomadism, and accepting a pluralist approach to emancipation, we analyse the ‘emancipatory project(s)’ that digital nomads engage in. This analysis, following Weberian idealtypes, employs a tripartite structure: unsatisfactory conditions (what people want to overcome); emancipatory means (actions taken); and emancipatory ends (desired outcomes). We critically compare digital nomadism to the traditional descriptions of emancipatory projects in nation-state contexts, as found in prior literature, using the same analytical framework. Juxtaposing these idealtypes, we discuss similarities and differences and analyse their inherent assumptions, logics and ethical stances. We conclude that digital nomadism generates an emancipation that is very much ‘real’ for digital nomads, whose experience cannot be disregarded, but with a ‘postmodern’ ethos that is at odds with modernity and its ethos originating from the Enlightenment.
Commercially Sexually Exploited Adolescent Girls: The Association Between Externalizing Disorders and Parental Incarceration with Suicide Attempts
Authors: Schiff Sara J. , Meza Jocelyn , Bath Eraka , Lee Steve S. 
Published: June 2024

AbstractCommercial sexual exploitation (CSE) is a significant public health concern disproportionately affecting ethnoracially minoritized girls. Despite strong associations of CSE with suicide attempts, little is known about correlates of suicide among girls with CSE histories. Elevated rates of externalizing disorders (i.e., attention-deficit/hyperactivity disorder [ADHD], disruptive behavior disorders [DBD], conduct disorder [CD]) were observed among CSE youth, particularly in ethnoracially minoritized samples. Youth with CSE histories are frequently affected by parental incarceration, which is correlated with risk for suicide attempts. We tested cross-sectional simultaneous associations of externalizing disorders and parental incarceration with number of suicide attempts among 360 ethnoracially diverse girls affected by CSE (Mean age = 18.86). ADHD, DBD, and maternal incarceration were positively associated with number of suicide attempts. Findings implicate clinical/familial correlates of suicide attempts in this marginalized group, suggesting early suicide prevention efforts may improve traction on this problem by focusing on individual and family level factors.
Transitioning to proof via writing scripts on the rules of a new discourse﻿
Authors: Kontorovich Igor’ , Liu Nicole Qiusong , Kang Sun-woong 
Published: June 2024

AbstractComing from the commognitive standpoint, we consider proof-based mathematics as a distinct discourse, the transition to which requires special rules for endorsement and rejection of mathematical statements. In this study, we investigate newcomers’ learning of these rules when being taught them explicitly. Our data come from academically motivated high-school students who took a special course in undergraduate mathematics. The course teacher dedicated three academic hours to introducing and explaining selected rules of proof to support students’ shift to the new discourse. The homework assignment consisted of typical proof-requiring problems and a scriptwriting task, asking students to compose a dialogue between fictional characters about a proof-related mistake of their choice. We analyzed the differences and similarities between the rules discussed in the classroom and those that students addressed and implemented in their proofs. The analysis showed that while students’ solutions to proof-requiring problems required rule implementation, fictitious dialogues opened the space for rule formulation and substantiation. In many cases, the students discussed the rules presented in the classroom, extending, elaborating, and specifying the teacher’s formulations. Furthermore, while the students’ proofs were mainly consistent with the teacher’s expectations, some of their rule formulations were more radical and overgeneralized than expected. These findings suggest that newcomers’ communication about the rules of proof may lag behind their capability to implement those rules to prove mathematical statements.
Cohomology-developed matrices: constructing families of weighing matrices and automorphism actions
Authors: Goldberger Assaf , Dula Giora 
Published: June 2024

AbstractThe aim of this work is to construct families of weighing matrices via their automorphism group action. The matrices can be reconstructed from the 0, 1, 2-cohomology groups of the underlying automorphism group. We use this mechanism to (re)construct the matrices out of abstract group datum. As a consequence, some old and new families of weighing matrices are constructed. These include the Paley conference, the projective space, the Grassmannian, and the flag variety weighing matrices. We develop a general theory relying on low-dimensional group cohomology for constructing automorphism group actions and in turn obtain structured matrices that we call cohomology-developed matrices. This ‘cohomology development’ generalizes the cocyclic and group developments. The algebraic structure of modules of cohomology-developed matrices is discussed, and an orthogonality result is deduced. We also use this algebraic structure to define the notion of quasiproducts, which is a generalization of the Kronecker product.
The Timelessness of the Scar in the Borderline Personality Disorder BPD: A Systemic Intervention in a Case of Child Sexual Abuse
Authors: Dominguez Danilo , Pérez-Testor Carles , Casarramona Aina , Aznar-Martínez Berta 
Published: June 2024

Abstract
Chronic sexual abuse in childhood can be directly associated with the formation of personality disorders such as BPD, with the majority of this abuse occurring in the family context. The objective of this article is to reference the importance of clinical and psychotherapeutic intervention from a systemic approach, prioritizing the analysis of interpersonal relationships, behavioral patterns repeated during the patient’s history and the adaptation of family roles learned during childhood to adulthood, obtaining extremely positive results in terms of remission of symptoms and general recovery of the patient.
Cycling performance of SiOx-Si-C composite anode with different blend ratios of PAA-CMC as binder for lithium sulfur batteries
Authors: Sathya Swamickan , Soosaimanickam Charlin , Bella Federico , Yoo Dong Jin , Stephan A. Manuel 
Published: June 2024

AbstractSilicon (Si) -based materials have been identified as a potential alternative anode owing to their superior theoretical capacity compared to conventional graphitic carbon. Nevertheless, the huge volume change (approximately 300%) that occurs while cycling still hampers this system from 100% practical applications. Silicon-monoxide (SiOx)-based anode materials, on the other hand, are being explored extensively due to their unique properties such as high theoretical capacity, formation of Li2O and LiSiO4 during initial lithiation process that act as a natural volume buffer matrix to accommodate volume changes and formation of a stable solid electrolyte interphase layer, which improves the cyclability and capacity retention. Although poly (vinylidene fluoride) (PVdF) is widely used as a binder, the weak van der Waals forces between PVdF and silicon-based particles fail to bind particles effectively, when substantial volume change occurs. Herein, we prepare a series of SiOx-Si-C electrodes with different binders poly (acrylic acid) (PAA), carboxyl methyl cellulose (CMC) and their blends as binder. The prepared polymeric blends are subjected to thermal, morphological, mechanical and physico-chemical analyses. The Li/ SiOx-Si-C cell assembled with 100% PAA as binder delivered a discharge capacity of 1908 mAh g−1 on its first cycle and 724 mAh g−1 on its 100th cycle with a fade in capacity of 11.8 mAh g−1 per cycle. Upon the incorporation of CMC in the PAA blend the cycling performance was found to be poor. Among the various investigated compositions, the electrode with sole poly (acrylic acid) as a binder offers the highest discharge capacity and this is attributed to the high concentration of the functional (carboxylic) group which forms strong hydrogen bonds with - OH groups on the SiOx or carbon surface. The interfacial properties of the polymeric binders are thoroughly investigated by spectroscopies and electrochemical tests.
Graphical abstract
Utilization of macroporous beads impregnated with Cyanex 572 for effective separation of Sr(II), Y(III), and Zr(IV) from chloride medium: batch and fixed-bed column study
Authors: Emam Sh. Sh. , Gamal R. , El-Hefny N. E. 
Published: June 2024

AbstractThis work focuses on using a new, inexpensive adsorbent, Amberlite XAD–4 resin impregnated with Cyanex 572 to extract and separate Zr(IV) from its parents Y(III) and Sr(II). The extraction performance was investigated using both batch and continuous flow techniques. The highest separation factor of Zr from Y and Sr was obtained at 0.05 mol L−1 HCl. Zr(IV), Y(III), and Sr(II) were found to have maximal monolayer capacities of 29.1, 9.3, and 6.1 mg g−1, respectively. Chromatography was utilized to effectively separate the relevant metals from their mixed solution in a single step, yielding high recovery values of approximately 99.0%.
Dynamic reduction technique for nonlinear analysis of spur gear pairs
Authors: Bruzzone Fabio , Rosso Carlo , Theodossiades Stephanos 
Published: June 2024

AbstractIn this study the dynamic response of a spur gear pair is analyzed using a novel nonlinear approach. The actual rolling motion and engagement of the system is simulated using a set of reduced order models obtained in a pre-processing phase using the minimal amount of master degrees of freedom without loss of accuracy or generality. The flexibility of the gear bodies is included by a refined finite element model, and no geometry simplification is introduced while also retaining all nonlinearity sources. To reduce the computational cost the time-varying mesh stiffness is also pre-computed and used depending on the instantaneous loading conditions. Contact loss is also taken into account, and reconnection events are treated as vibro impacts. The results are compared against high quality and demanding experimental results with a computational cost several orders of magnitude lower than models with similar accuracy. Different loading conditions are investigated during the sweep-up and down maneuvers. Mainly, the dynamic transmission error is analyzed, showing remarkable agreement with the test campaign’s results. Different nonlinear phenomena such as hysteretic jumps and sub- and super-harmonic resonances are correctly predicted by the proposed model in terms of both frequency and amplitude. This method allows quick and accurate nonlinear analyses overcoming current limitations and is open to further complications to include other components and effects.
Sizes of Flat Maximal Antichains of Subsets
Authors: Griggs Jerrold R. , Kalinowski Thomas , Leck Uwe , Roberts Ian T. , Schmitz Michael 
Published: June 2024

AbstractThis is the second of two papers investigating for which positive integers m there exists a maximal antichain of size m in the Boolean lattice $$B_n$$

B
n

(the power set of $$[n]:=\{1,2,\dots ,n\}$$

[
n
]
:
=
{
1
,
2
,
⋯
,
n
}

, ordered by inclusion). In the first part, the sizes of maximal antichains have been characterized. Here we provide an alternative construction with the benefit of showing that almost all sizes of maximal antichains can be obtained using antichains containing only l-sets and $$(l+1)$$

(
l
+
1
)

-sets for some l.
European banking M&As: The role of financial advisors
Authors: Anagnostopoulos Yiannis , Alexandrou George , Thomas Hardy M. 
Published: June 2024

AbstractWe investigate the puzzle of banks contracting the services of external advisors for deals they can self-manage and the role of financial advisors in mergers and acquisitions among European banking firms. We also study the determinants of the choice by bank acquirers and bank targets to either appoint external advisors or manage in-house, as well as between appointing either top or lower tier advisors. Top tier advisors are more likely to be employed in debt financed and cross-border deals. We also find that most European bank mergers are managed in-house, contrary to prior findings reporting mostly externally managed deals attributed to the certification effect. Targets fail to benefit from deals where they do not match acquirer’s decision to appoint external advisors. However, there is an overall propensity to match the counter party’s tier of advisor.
Hydrogen Production Came from Catalytic Reforming of Volatiles Generated by Waste-Plastic Pyrolysis Over Sepiolite-Based Catalysts
Authors: Martín-Lara M. Ángeles , Moreno R. , Blázquez G. , Calero M. 
Published: June 2024

Abstract
Several sepiolite-based catalysts have been prepared and investigated for pyrolytic H2 production from a post-consumer mixture of residual plastics. The experimental installation involved a two-stage reaction system: first, the plastic mixture was thermally pyrolyzed at 500 ºC; then, the generated volatiles were reformed by increasing the temperature to 700 ºC and 800 ºC in the presence of the sepiolite-based catalysts. The real mixture came from non-separate waste collection streams and contained post-consumer polypropylene (rigid and film), expanded polystyrene, high-impact polystyrene, and polyethylene. The results demonstrated that the two-stage pyrolysis technique using sepiolite-based catalysts successfully generated hydrogen. The effects of the type of polymer, temperature, and catalyst were analyzed. The higher production of hydrogen (27.2 mmol H2/g) was obtained when the mixture of plastic waste was pyrolyzed and then the volatiles were reformed at 800 °C with the SN5-800 12 nickel-modified sepiolite. Additionally, the generation of hydrogen also increased after acidifying natural sepiolite (from 18.2 mmol H2/g plastic for natural sepiolite to 26.4 mmol H2/g for acidified sepiolite at 800 ºC with a plastic/catalyst ratio of 1:2). Finally, the carbon deposited in the catalysts was examined. Approximately, only 20% of the carbon that was deposited in the sepiolite-based catalysts was filamentous carbon; the majority was amorphous carbon.
The results have therefore shown that it is possible to obtain a hydrogen-rich gas from the reforming of the pyrolysis vapors of a mixture of plastic waste using a low-cost catalyst based on nickel-modified sepiolite.