bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of forming forces at SPIF using Taguchi method
Authors: Popp Mihai-Octavian , Racz Sever-Gabriel , Oleksik Mihaela , Gîrjob Claudia , Biriş Cristina 
Published: October 2022

Incremental sheet metal forming process has seen one of the highest increases in diversity in the last years. Single point incremental forming (SPIF) has become more attractive due to multiple benefits it possesses over other conventional cold forming processes such as deep-drawing. However, the process has yet to arise in the large-scale industrial implementation because of its drawbacks such as high production time and low accuracy, which lead to prototype production.
A very important aspect for this manufacturing process is the analysis of the form-ing forces in terms of process energy especially when using industrial robots.
The aim of this paper is to investigate the influence of material and vertical step over the forming forces. Thus, aluminum and steel sheets with a thickness of 0,8mm were incrementally deformed as a truncated cone with an angle of 60°, at a depth of 30mm. Experiments were performed using a KUKA KR 210-2 robot which allows to measure the forces using a piezoresistive sensor.
After performing the analysis of the forming forces using the Taguchi method, it can be observed that the material has the highest influence.
Modern Techniques for Remanufacturing Hydraulic Equipment in the Context of Circular Economy and Energy Efficiency
Authors: Dumitrescu Cătălin , Gavrus Adinel , Rădoi Radu , Şefu Ştefan , Chiriţă Alexandru-Polifron , Popescu Ana-Maria , Preda Dragoş 
Published: October 2022

The article presents several current methods of remanufacturing hydraulic components, a trend that is encouraged, on the one hand, by concerns about reducing material consumption in the context of the circular economy - some of these materials being expensive or in short supply. On the other hand, remanufacturing by modern methods can lead to a decrease in energy consumption in the devices concerned, due to obtaining shapes that are difficult to achieve by classical procedures. Among the remanufacturing processes considered there are additive manufacturing, metal coating, reverse engineering, etc.
An important step in the remanufacturing process is testing of components, which certifies the achievement of performances at least equivalent to those of the original products. To this end, the article presents a test bench solution with the help of which tests can be carried out on hydraulic devices such as hydraulic pumps and (linear or rotary) motors, hydraulic directional control valves or other types of valves.
Acute care diagnostics in children for general radiologists – not alone in the hospital at night
Authors: Beer Meinrad , Mentzel Hans-Joachim , Steinborn Marc , Schaal Matthias Cornelius 
Published: October 2022

Background Radiologic care for children and adolescents during night and weekend shifts is challenging. This is especially true when a dedicated pediatric radiology front or background service is not available.
Methods The purpose of this review is to present the approach, the most relevant diagnoses, and their differential diagnoses based on four common example cases – abdominal pain, respiratory/chest pain, headache, and refusal to walk. Essentials such as clinical classification (e. g., disease dynamics) and practical instructions (e. g., necessity of acute cross-sectional imaging) are presented.
Results and Conclusion For the abdomen, appendicitis ranks first among acute diseases. Other important diseases are intussusception and volvulus. Far more frequently, however, gastroenteritis is the cause of abdominal pain. Usually no imaging is required in this case. In unclear clinical situations, ultrasound may be indicated. In suspected pulmonary infections, chest imaging is limited to inconclusive cases and suspicion of complications such as pleural empyema. Major emergencies include (spontaneous) pneumothorax and aspiration. Headache is a common symptom. Immediate imaging is only necessary in cases of suspected acute inflammatory (meningitis/encephalitis) or vascular disease (e. g., hemorrhage due to vascular malformations). MRI is the primary imaging modality in these cases. Restricted walking/refusal to walk is a classic nonspecific sign, particularly of acute musculoskeletal disease, especially in younger children. Clinical examination is essential to narrow down the field of investigation. Besides the frequent and symptomatic coxitis fugax, the rare but serious (septic) arthritis/osteomyelitis must not be overlooked.
Key Points:
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Chiral-at-Ru Catalyst with Cyclometalated Imidazo[1,5-a]pyridin­ylidene for Enantioselective Intramolecular Cyclopropanations
Authors: Meggers Eric , Han Feng , Xie Yuanhao , Xie Xiulan , Ivlev Sergei I. 
Published: October 2022

AbstractA chiral ruthenium catalyst is introduced which contains a cyclometalated N-(3-nitrophenyl)-imidazo[1,5-a]pyridinylidene ligand in addition to a bidentate 4-mesityl-2-(pyridin-2-yl)thiazole and two acetonitriles to complement the octahedral coordination sphere of the monocationic complex. Tetrafluoroborate serves as the counterion. Since all coordinated ligands are achiral, the overall chirality is formally due to a stereogenic metal center generating either a left-handed (Λ) or right-handed (Δ) helical topology of this chiral-at-metal complex. Nonracemic Λ and Δ complexes were synthesized using (R)- and (S)-N-benzoyl-tert-butanesulfinamide as chiral auxiliary ligands, respectively. The position of the nitro group in the metalated phenyl moiety is of crucial importance for the generation of enantiomerically pure complexes. The catalytic activity of the cycloruthenated chiral-at-metal catalyst was demonstrated for the enantioselective intramolecular cyclopropanation of trans-cinnamyl diazoacetate and an alkenyl diazoketone to generate bicyclic cyclopropanes in high yields (96–97%) and with satisfactory enantioselectivity (93% ee).
Zn/ZnBr2 Catalysed Reaction of Aldehydes with Allylbromide: Synthesis of 2,6-Disubstituted 4-Bromotetrahydropyrans
Authors: Narsaiah A. Venkat , Biradar D. O. , Mane Y. D. , Sarnikar Y. P. , Kulkarni S. G. , Reddy B. V. Subba 
Published: October 2022

AbstractAn efficient approach for the one-pot synthesis of 4-bromotetrahydropyrans in a highly diastereoselective manner via the alkynylation followed by Prins cyclisation is described. The method employs aldehydes and allyl bromide as reactants, with a Zn/ZnBr2 catalytic system in CH2Cl2. A variety of 2,6-disubstituted 4-bromotetrahydropyran derivatives were obtained in good yields.
Analysis of von Willebrand Disease in the “Heart of Europe”
Authors: Vangenechten Inge , Smejkal Petr , Zavrelova Jiri , Zapletal Ondrej , Wild Alexander , Michiels Jan Jacques , Berneman Zwi , Blatny Jan , Batorova Angelika , Prigancova Tatiana , Penka Miroslav , Gadisseur Alain 
Published: October 2022

Abstract
Background von Willebrand disease (VWD) is a genetic bleeding disorder caused by defects of von Willebrand factor (VWF), quantitative (type 1 and 3) or qualitative (type 2). The laboratory phenotyping is heterogenic making diagnosis difficult.
Objectives Complete laboratory analysis of VWD as an expansion of the previously reported cross-sectional family-based VWD study in the Czech Republic (BRNO-VWD) and Slovakia (BRA-VWD) under the name “Heart of Europe,” in order to improve the understanding of laboratory phenotype/genotype correlation.
Patients and Methods In total, 227 suspected VWD patients were identified from historical records. Complete laboratory analysis was established using all available assays, including VWF multimers and genetic analysis.
Results A total of 191 patients (from 119 families) were confirmed as having VWD. The majority was characterized as a type 1 VWD, followed by type 2. Multimeric patterns concordant with laboratory phenotypes were found in approximately 83% of all cases. A phenotype/genotype correlation was present in 84% (77% type 1, 99% type 2, and 61% type 3) of all patients. Another 45 candidate mutations (23 novel variations), not found in the initial study, could be identified (missense 75% and truncating 24%). An exon 1–3 gene deletion was identified in 14 patients where no mutation was found by direct DNA sequencing, increasing the linkage up to 92%, overall.
Conclusion This study provides a cross-sectional overview of the VWD population in a part of Central Europe. It is an addition to the previously published BRNO-VWD study, and provides important data to the International Society of Thrombosis and Haemostasis/European Association for Haemophilia and Allied Disorders VWD mutation database with identification of novel causal mutations.
When Love Takes Over: Boosting Love Towards Airbnb Brand
Authors: Foroudi Pantea , Palazzo Maria , Sabina Karanikosova 
Published: October 2022

AbstractThe COVID-19 epidemic affected all industries, but the hospitality sector was hardest hit as governments used social distancing to prevent outbreaks. Based on the insights of relationship theory, before social distancing became an essential behaviour spread globally, this study attempts to understand what factors influence love for Airbnb brand, how they are linked together, and how love for Airbnb brand could be beneficial to local business/market. This research focussed on 9 in-depth interviews with Airbnb hosts and 3 focus groups with 13 experts from short-term rentals companies in Prague (22 participants). The outcome of this study provides insights on love towards Airbnb brand, and based on this, it set a start point for deeper, beneficial connectivity between Airbnb users and local community. This research contributes to the expansion of literature about love towards Airbnb brand, its dimensions, and its main outcome. This study suggests that brand identity, communication and branding activities, service attractiveness, guest experience, perceived cultural value, satisfaction and reputation are dimensions of love towards Airbnb brand and have as main outcome love towards local community.
Nonlinear chirped interferometry for frequency-shift measurement and χ(3) spectroscopy
Authors: Neradovskaia E. , Maingot B. , Chériaux G. , Claudet C. , Forget N. , Jullien A. 
Published: October 2022

Four-wave mixing processes are ubiquitous in ultrafast optics and the determination of the coefficients of the χ(3) tensor is thus essential. We introduce a novel time-resolved ultrafast spectroscopic method to characterize the third-order nonlinearity on the femtosecond time-scale. This approach, coined as “nonlinear chirped interferometry,” makes use of the variation of the optical group delay of a transmitted probe under the effect of an intense pump pulse in the nonlinear medium of interest. The observable is the spectral interference between the probe and a reference pulse sampled upstream and the metric is the transient swing of the probe group delay. We show that the detected signal is enhanced when the pulses are weakly chirped, and that, although interferometric, the method is intrinsically less sensitive to environmental phase fluctuations and drifts. By chirping adequately the reference pulse, the transient frequency shift of the probe pulses is also detected in the time domain and the detected nonlinear signal is enhanced. Nonlinear phase shifts as low as 10 mrad, corresponding to a frequency shift of 30 GHz, i.e., 0.01% of the carrier frequency, are detected without heterodyne detection or active phase-stabilization. The diagonal and/or non-diagonal terms of reference glasses (SiO2) and crystals (Al2O3, BaF2, CaF2) are characterized. The method is finally applied to measure the soft vibration mode of KTiOAsO4 (KTA).
Men of refugee and migrant backgrounds in Australia: a scoping review of sexual and reproductive health research
Authors: Mengesha Zelalem , Hawkey Alexandra J. , Baroudi Mazen , Ussher Jane M. , Perz Janette 
Published: October 2022

Australia’s National Men’s Health Strategy 2020–2030 identifies refugee and migrant men from culturally and lingustically diverse backgrounds as priority groups for sexual and reproductive health (SRH) interventions. The paucity of SRH research focusing on refugee and migrant men is a significant gap to advance men’s health and policy. Hence, this review aimed to synthesise the available evidence on refugee and migrant men’s SRH needs, understandings and experiences of accessing services after resettlement in Australia. A systematic search of peer reviewed literature in PubMed, Scopus, and PsyInfo was made. A World Health Organization framework for operationalising sexual health and its relationship with reproductive health was used to map the identified studies. The socio-ecological framework was applied to thematically synthesise data extracted from individual studies and identify factors that influence the SRH of refugee and migrant men. We included 38 papers in the review. The majority of sexual health studies (16) were about sexually transmitted infections (STIs), mainly HIV (12), followed by sexual health education and information (5) and sexual functioning (3). Reproductive health studies focused on contraceptive counselling and provision (3), antenatal, intrapartum and postnatal care (1) and safe abortion care (1). Several factors influenced refugee and migrant men’s SRH, including a lack of access to SRH information, language barriers and stigma. We found that SRH literature on refugee and migrant men focuses on STIs, meaning other areas of SRH are poorly understood. We identified key gaps in research on experiences of, and access to, comprehensive SRH care.
DNA polymerase epsilon binds histone H3.1-H4 and recruits MORC1 to mediate meiotic heterochromatin condensation
Authors: Wang Cong , Huang Jiyue , Li Yingping , Zhang Jun , He Chengpeng , Li Tianyang , Jiang Danhua , Dong Aiwu , Ma Hong , Copenhaver Gregory P. , Wang Yingxiang 
Published: October 2022

Heterochromatin is essential for genomic integrity and stability in eukaryotes. The mechanisms that regulate meiotic heterochromatin formation remain largely undefined. Here, we show that the catalytic subunit (POL2A) ofArabidopsisDNA polymerase epsilon (POL ε) is required for proper formation of meiotic heterochromatin. The POL2A N terminus interacts with the GHKL adenosine triphosphatase (ATPase) MORC1 (Microrchidia 1), and POL2A is required for MORC1’s localization on meiotic heterochromatin. Mutations affecting the POL2A N terminus cause aberrant morphology of meiotic heterochromatin, which is also observed inmorc1. Moreover, the POL2A C-terminal zinc finger domain (ZF1) specifically binds to histone H3.1-H4 dimer or tetramer and is important for meiotic heterochromatin condensation. Interestingly, we also found similar H3.1-binding specificity for the mouse counterpart. Together, our results show that two distinct domains of POL2A, ZF1 and N terminus bind H3.1-H4 and recruit MORC1, respectively, to induce a continuous process of meiotic heterochromatin organization. These activities expand the functional repertoire of POL ε beyond its classic role in DNA replication and appear to be conserved in animals and plants.
Heisenberg-invariant self-dual Einstein manifolds
Authors: Cortés V , Murcia Á 
Published: October 2022

Abstract
We classify all self-dual Einstein four-manifolds invariant under a principal action of the three-dimensional Heisenberg group with non-degenerate orbits. This is of interest in the study of quantum-corrected gravitational physics, since they naturally arise as scalar manifolds of particular Lorentzian and Euclidean supergravities with one-loop corrections. The metrics are explicit and we find, in particular, that the Einstein constant can take any value. Then we examine when the corresponding (Riemannian or neutral-signature) metrics are (geodesically) complete. Finally, we exhibit the solutions of non-zero Ricci-curvature as different branches of one-loop deformed universal hypermultiplets in Riemannian and neutral signature.
A Fokker–Planck-based Monte Carlo method for electronic transport and avalanche simulation in single-photon avalanche diodes
Authors: Helleboid Rémi , Rideau Denis , Nicholson Isobel , Grebot Jeremy , Mamdy Bastien , Mugny Gabriel , Basset Marie , Agnew Megan , Golanski Dominique , Pellegrini Sara , Saint-Martin Jérôme , Pala Marco , Dollfus Philippe 
Published: October 2022

Abstract
We present an efficient simulation method for electronic transport and avalanche in single-photon avalanche diodes (SPAD). Carrier transport is simulated in the real space using a particle Monte Carlo approach based on the Fokker–Planck point of view on an advection-diffusion equation, that enables us to reproduce mobility models, including electric fields and doping dependencies. The avalanche process is computed thanks to impact ionization rates implemented using a modified Random Path Length algorithm. Both transport and impact ionization mechanisms are computed concurrently from a statistical point of view, which allows us to achieve a full multi-particle simulation. This method provides accurate simulation of transport and avalanche process suitable for realistic three-dimensional SPADs, including all relevant stochastic aspects of these devices, together with a huge reduction of the computational time required, compared to standard Monte Carlo methods for charge carrier transport. The efficiency of our method empowers the possibility to precisely evaluate SPADs figures of merit and to explore new features that were untrackable by conventional methods. An extensive series of comparisons with experimental data on state-of-the art SPADs shows a very good accuracy of the proposed approach.
Superconductivity in CeBeH8 and CeBH8 at moderate pressures
Authors: Hou Yu , Li Bin , Bai Yan , Hao Xiaofeng , Yang Yeqian , Chi Fengfeng , Liu Shengli , Cheng Jie , Shi Zhixiang 
Published: October 2022

Abstract
High-pressure structural searches of superhydrides CeBeH8 and CeBH8 were performed under ambient pressure up to 300 GPa. We identify

F
m

3
‾

m

-CeBeH8 with a superconducting transition temperature T

c
of 56 K at 10 GPa. Two more phases with spacegroup

R

3
‾

m

and

C
2

/

m

, were investigated within the increasing pressures. CeBH8 shows a similar phase transition process as CeBeH8 but with higher transition pressures and higher T

c
.

F
m

3
‾

m

-CeBH8 is predicted to be superconducting above 120 GPa with a maximum T

c
of 118 K at 150 GPa.

R

3
‾

m

-CeBH8 and

C
2

/

m

-CeBH8 are dynamically stable above 120 GPa and 100 GPa, respectively. The maximum T

c
is 123 K at 195 GPa for

R

3
‾

m

-CeBH8, and 115 K at 350 GPa for

C
2

/

m

-CeBH8. Our work enriches the family of ternary hydrides and may provide a useful guideline for further search for superconducting hydrides at low and moderate pressures.
Precession-induced nonclassicality of the free induction decay of NV centers by a dynamical polarized nuclear spin bath
Authors: Lin Mu-Che , Lo Ping-Yuan , Nori Franco , Chen Hong-Bin 
Published: October 2022

Abstract
The ongoing exploration of the ambiguous boundary between the quantum and the classical worlds has spurred substantial developments in quantum science and technology. Recently, the nonclassicality of dynamical processes has been proposed from a quantum-information-theoretic perspective, in terms of witnessing nonclassical correlations with Hamiltonian ensemble simulations. To acquire insights into the quantum-dynamical mechanism of the process nonclassicality, here we propose to investigate the nonclassicality of the electron spin free-induction-decay process associated with an NV− center. By controlling the nuclear spin precession dynamics via an external magnetic field and nuclear spin polarization, it is possible to manipulate the dynamical behavior of the electron spin, showing a transition between classicality and nonclassicality. We propose an explanation of the classicality–nonclassicality transition in terms of the nuclear spin precession axis orientation and dynamics. We have also performed a series of numerical simulations supporting our findings. Consequently, we can attribute the nonclassical trait of the electron spin dynamics to the behavior of nuclear spin precession dynamics.
Pressure-induced structural phase transitions of zirconium: an ab initio study based on statistical ensemble theory
Authors: Ning Bo-Yuan 
Published: October 2022

Abstract
Recently, we put forward a direct integral approach to solve the partition function with ultrahigh efficiency and precision, which enables the rigorous ensemble theory to investigate phase behaviors of realistic condensed matters and has been successfully applied to the phase transition of vanadium metal (Ning et al 2022 J. Phys.: Condens. Matter
34 425404). In this work, the approach is applied to the structural phase transitions of zirconium metal under compressions up to 160 GPa and ultrahigh calculation precision is achieved. For the obtained equation of state with pressure over 40 GPa, the deviations from latest experiments are within

0.7
%

and the computed transition pressure of

α
→
ω

is 6.93 GPa, which is about five times larger than previous theoretical predictions and in excellent agreement with the measured range of 5–15 GPa. Our results support the argument that there is no existence of the isostructural phase transition of Zr metal that was asserted by recent experimental observations.
Origin of variable propensity for anomalous slip in body-centered cubic metals
Authors: Gröger Roman 
Published: October 2022

Abstract
Many transition metals crystalizing in the body-centered cubic (bcc) structure exhibit anomalous slip on low-stressed

{
110
}

planes at low homologous temperatures, which cannot be reconciled with the Schmid law. Specifically, for uniaxial loading in the center of the

[
001
]
−
[
011
]
−
[

1
ˉ

11
]

stereographic triangle, this is manifested by

1

/

2
[
111
]

and

1

/

2
[
1

1
ˉ

1
ˉ

]

screw dislocations moving on low-stressed

(
0

1
ˉ

1
)

planes. While the anomalous slip is often attributed to non-planar cores of

1

/

2
⟨
111
⟩

screw dislocations or to the tendency for their networks to glide easily, it remains unclear why it dominates the plastic deformation in some bcc metals, whereas it is weak or even absent in others. Using molecular statics simulations at 0 K, we demonstrate that the anomalous slip in bcc metals is intimately linked with the stability of

⟨
100
⟩

screw junctions between two intersecting

1

/

2
⟨
111
⟩

screw dislocations under stress (for example,

1

/

2
[
111
]

and

1

/

2
[
1

1
ˉ

1
ˉ

]

screws giving rise to the [100] junction). Our atomic-level studies show that in nearly all bcc metals of the 5th and 6th groups these junctions cannot be broken by the applied stress and the three dislocations can only move on the common

{
110
}

plane (in the above example on the

(
0

1
ˉ

1
)

plane). On the other hand, these junctions are found to be unstable in alkali metals, tantalum, and iron, where the application of stress results in unzipping of the two dislocations and their further glide on the planes predicted for isolated dislocations. These results also suggest that the experimentally observed increased propensity for the anomalous slip in further stages of plastic deformation may be explained by reduced curvatures of

1

/

2
⟨
111
⟩

screw dislocations in dense networks.