bluuebunny/crossref_metadata_2025_split huggingface dataset:
Correlation between copper particle morphology and number of graphene layers on a palladium substrate
Authors: Takahashi Junro , Nakamura Kengo , Kioka Yusei , Kato Hiroki , Yamamoto Takahiro , Homma Yoshikazu 
Published: November 2022

Abstract
Metal–metal interactions through graphene can result in interesting phenomena, although the effective range has not yet been studied in detail. This work investigated these interactions by evaluating the contact angles of Cu particles on graphene grown on a Pd substrate. Thermally-induced variations in the morphology of the particles were assessed using in situ scanning electron microscopy, and such changes were also evaluated by conducting molecular dynamics calculations. The contact angle exhibited a marked decrease in going from graphene multi-layers to a mono-layer. The simulations showed the particles on a graphene mono-layer will interact both with the graphene and the substrate.
Significant reduction of crack propagation in the strained SiGe/Ge(111) induced by the local growth on the depth-controlled area patterning
Authors: Wagatsuma Youya , Kanesawa Rena , Alam Md. Mahfuz , Okada Kazuya , Inoue Takahiro , Yamada Michihiro , Hamaya Kohei , Sawano Kentarou 
Published: November 2022

Abstract
We propose a method for obtaining crack-free fully-strained SiGe layers on Ge(111). To achieve the crack-free strained SiGe layers, we introduce a patterned area with a sufficient depth (step height) of more than 1 μm on Ge(111) substrates. Because of the complete suppression of the crack propagation from the SiGe layer grown on the outside of the patterned area on Ge(111), we achieve crack-free fully strained SiGe layers on the inside of the patterned area. This approach will drastically expand the applicability of the strained SiGe to the fields of Si photonics and spintronics.
Orthogonal Multi-frequency Fusion Based Image Reconstruction and Diagnosis in Diffuse Optical Tomography
Authors: Ben Yedder Hanene , Hamarneh Ghassan , Cardoen Ben 
Published: November 2022

<p>Identifying breast cancer lesions with a portable diffuse optical tomography (DOT) device improves early detection, while avoiding otherwise unnecessarily invasive, ionizing, and expensive modalities such as CT, as well as enabling first line of care treatment efficacy. Critical to this capability is not just identification of lesions, but rather the complex problem of discriminating between malignant and benign lesions. To accurately capture the highly heterogeneous tissue of a cancer lesion embedded in healthy breast tissue with non-invasive DOT, multiple frequencies can be combined to optimize signal penetration and reduce sensitivity to noise. However, these frequency responses can overlap, capture common information, and correlate, potentially confounding reconstruction and downstream end tasks. We show that an orthogonal fusion loss of multi-frequency DOT can improve reconstruction. More importantly, the orthogonal fusion leads to more accurate end-to-end identification of malignant versus benign lesions, illustrating its regularization properties on the multi-frequency input space. With the line-of-care deployment of portable DOT probes requiring a severely constrained computational budget, we show that our raw-to-task model, for direct prediction of end task from signal, significantly reduces computational complexity without sacrificing accuracy, enabling lower latency and higher, real-time throughput in medical settings. </p>
On modules over the mod 2 Steenrod algebra and hit problems
Authors: Võ Phúc Đặng 
Published: November 2022

<p>We will look at the binary field $\mathbb F_2$. The classical "hit problem" in algebraic topology, which is widely considered to be an important and fascinating open problem that has yet to be resolved, asks for a minimal set of generators for the polynomial algebra, $\mathcal P_m:=\mathbb F_2[x_1, x_2, \ldots, x_m]$, on $m$ variables $x_1, \ldots, x_m$, each of which has degree one, regarded as a connected unstable module over the 2-primary Steenrod algebra $\mathscr A.$ The algebra $\mathcal P_m$ is the cohomology with $\mathbb F_2$-coefficients of the product of $m$ copies of the Eilenberg-MacLan complex $K(\mathbb F_2, 1)$. Despite extensive study over the past three decades, the hit problem remains unresolved for $m\geq 5$. </p>
<p>In this article, we develop our previous work [Commun. Korean Math. Soc. \textbf{35} (2020), 371-399] on the hit problem for the $\mathscr A$-module $\mathcal P_5$ in the generic degree $n_s = 5(2^{s}-1) + 18.2^{s}$ with $s$ an arbitrary non-negative integer. As a consequence, a localized variation of the Kameko conjecture, which concerns the dimension of the cohit space $\mathbb F_2\otimes_{\mathscr A}\mathcal P_m$ in relation to parameter vectors, has been claimed to be veracious in the instance where $m = 5$ and the degree is $n_s.$ Also, we demonstrate that this conjecture remains valid for all $m\geq 1$ and degrees $\leq 12.$ This study has two important applications: (1) it establishes the dimension result for the cohit space $\mathbb F_2\otimes_{\mathscr A}\mathcal P_m$ for $m = 6$ in the generic degree $5(2^{s+4}-1) + n_1.2^{s+4}$ with $s > 0;$ and (2) it describes the representations of the general linear group of rank $5$ over $\mathbb F_2.$ As a result, we prove that the algebraic transfer, defined by William Singer [Math. Z. \textbf{202} (1989), 493-523], is an isomorphism in bidegrees $(5, 5+n_s)$ with $s\geq 0.$ Besides, we obtain new results on the behavior of this algebraic transfer for all homological degrees $m$. Specifically, we show that Singer's transfer is a trivial isomorphism in bidegree $(m, m+12)$ for any $m > 0$. At the end of this work, we discuss the hit problem for the symmetric polynomial algebra $\mathcal P_m^{\Sigma_m}.$ This topic has been previously studied by Ali Janfada and Reginald Wood for $m\leq 3.$</p>
Interplay between Physical Layer Security and Blockchain Technology for 5G and Beyond: A Comprehensive Survey
Authors: Ghourab Esraa M. , Jaafar Wael , Bariah Lina , Muhaidat Sami , Yanikomeroglu Halim 
Published: November 2022

<p>Fifth-generation and beyond (5G and xG) wireless networks are envisioned to meet the requirements of various vertical applications that require higher traffic throughput, ultra-massive connectivity, extremely low latency, and high quality of service. Disruptive technologies, such as massive multiple-input multiple-output, millimeter wave, and multiple access are being deployed to meet these requirements. However, the deployment of these technologies poses several challenges, including the lack of network transparency, management decentralization, and reliability. In addition, the heterogeneity of these networks raises security concerns, particularly, confidentiality, privacy, and trustworthiness. Typically, networks rely on encryption techniques at higher layers to ensure security and privacy. However, due to the emergence of novel computing paradigms, such as quantum computing, traditional security approaches are no longer sufficient to protect over-the-air communications. Therefore, 5G/xG networks must consider smarter and more efficient security techniques to operate seamlessly and efficiently. Within this context, physical layer security (PLS) and blockchain represent promising solutions to complement existing methods. By exploiting the characteristics of wireless links, PLS can enhance the security of wireless communications, while blockchain can guarantee the decentralization, integrity, and trustworthiness of networks. Motivated by these technological advancements, this paper provides an in-depth review of the existing literature on PLS and blockchain. Then, for the first time, we present a framework for the integration of PLS with blockchain in 5G/xG systems. We begin by providing a thorough discussion about the potential of PLS and blockchain for 5G/xG systems. Next, we present our vision of a cross-layer architecture that leverages both PLS and blockchain in 5G/xG networks. Finally, we identify related challenges and open issues and shed light on future research directions.</p>
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MODEL QFD DAN IPA 2 DIMENSI PADA PELAYANAN PASIEN COVID-19 DI RSDC WISMA ATLET DKI JAKARTA GUNA MENINGKATKAN KUALITAS LAYANAN KESEHATAN
Authors: Wilujeng Fuji Rahayu , Rembulan Glisina Dwinoor 
Published: November 2022

Covid-19 (Corova Virus Disease 2019) is a type of infectious disease that is currently becoming a lot of conversation and causing concern for the public. Since the emergence of the first Covid-19 case, it has caused a stir that has occurred in various parts of the world, including Indonesia. Because Covid-19 can infect anyone without any age limit. Covid-19 also has an impact on a country's economic growth and losses in terms of public health.Another bad impact in terms of public health can be seen in the number of referral hospitals and emergency hospitals appearing based on government decisions. One of the emergency hospitals for Covid patients is the Wisma Atlet Covid-19 Emergency Handling Hospital (RSDC). Wisma Athlete's Wisma Atlet Emergency Hospital (RSDC), Kemayoran since its first operation on March 23, 2020 until now. The Covid-19 pandemic has resulted in a drastic increase in the various types of health services available. Therefore, the surrounding community certainly has hope for the quality of service in the available hospitals, especially the Wisma Atlet RSDC in order to meet user satisfaction. Based on the explanation above, this research was conducted which aims and is useful to find out what attributes are experiencing problems in the quality of service at the Wisma Atlet Hospital and find out the steps to improve the attributes that are experiencing problems. The method used in this research is Importance Performance Analysis 2 Dimension (IPA) which is used to measure service performance on the quality of service received by consumers based on the size of the assessment on reality and expectations, then followed by the Quality Function Deployment method used to provide technical responses sourced from Voice of Customer (VOC) so that it is hoped that in the future the RSDC Wisma Atlet can improve the quality of its services to improve public health.
Implementación de la telemedicina en la asistencia sanitaria pediátrica durante la pandemia COVID-19
Authors: Sánchez-Trujillo Lara , García Herrero María Ángeles , Vieira dos Santos Joao Pedro , Blázquez Gómez Cristina Julia 
Published: November 2022

Introducción: La pandemia COVID-19 ha supuesto un reto social, económico, pero sobre todo sanitario. La consulta telefónica que se inició durante el confinamiento, inicialmente en atención primaria y después, con la relajación de las medidas, en la atención hospitalaria, se ha implementado como opción asistencial. Se ha elaborado un estudio para intentar conocer la satisfacción de las familias y de los profesionales, así como aspectos de seguridad de esta opción asistencial. Material y métodos: Se llevó a cabo una encuesta anónima a familiares de pacientes pediátricos y a profesionales sanitarios que recibieron y prestaron asistencia de manera telefónica entre mayo y diciembre de 2020 en un hospital de segundo nivel asistencial. Las variables se recogieron y analizaron mediante Excel y SPSS. Resultados: Las familias valoraron positivamente la atención en el 89,6 % y al 73,5 % le gustaría seguir teniendo un modelo de atención mixta e integrarían otros elementos de telemedicina. El 91,9 % entendió correctamente las explicaciones. Respecto a los profesionales sanitarios, el 85,7% estuvo de acuerdo con el sistema de atención mixto. Al 76,1% la consulta le resulta más eficiente, pero solo el 33% incrementaría la proporción de este tipo de consultas. El 52% creen que esta atención no repercute en la seguridad del paciente, aunque el 61,9% cree que sí lo hace negativamente en la formación de los médicos internos residentes. Conclusiones: Existe un elevado grado de satisfacción de pacientes y profesionales, estando ambos predispuestos a continuar con este modelo asistencial. Parece que la pandemia por SARS-CoV2 ha impulsado la instauración definitiva de la telemedicina en las consultas pediátricas hospitalarias.
Humans trade off search costs and accuracy in a combined visual search and perceptual task
Authors: Wagner Ilja , Henare Dion , Tünnermann Jan , Schubö Anna , Schütz Alexander C. 
Published: November 2022

AbstractTo interact with one’s environment, relevant objects have to be selected as targets for saccadic eye movements. Previous studies have demonstrated that factors such as visual saliency and reward influence saccade target selection, and that humans can dynamically trade off these factors to maximize expected value during visual search. However, expected value in everyday situations not only depends on saliency and reward, but also on the required time to find objects, and the likelihood of a successful object-interaction after search. Here we studied whether search costs and the accuracy to discriminate an object feature can be traded off to maximize expected value. We designed a combined visual search and perceptual discrimination task, where participants chose whether to search for an easy- or difficult-to-discriminate target in search displays populated by distractors that shared features with either the easy or the difficult target. Participants received a monetary reward for correct discriminations and were given limited time to complete as many trials as they could. We found that participants considered their discrimination performance and the search costs when choosing targets and, by this, maximized expected value. However, the accumulated reward was constrained by noise in both the choice of which target to search for, and which elements to fixate during search. We conclude that humans take into account the prospective search time and the likelihood of successful a object-interaction, when deciding what to search for. However, search performance is constrained by noise in decisions about what to search for and how to search for it.
Implicit Large-eddy Simulations of Global Solar Convection: Effects of Numerical Resolution in Nonrotating and Rotating Cases
Authors: Guerrero G. , Stejko A. M. , Kosovichev A. G. , Smolarkiewicz P. K. , Strugarek A. 
Published: November 2022

Abstract
Simulating deep solar convection and its coupled mean-field motions is a formidable challenge where few observational results constrain models that suffer from the nonphysical influence of the grid resolution. We present hydrodynamic global implicit large-eddy simulations of deep solar convection performed with the EULAG-MHD code, and we explore the effects of grid resolution on the properties of rotating and nonrotating convection. The results, based on low-order moments and turbulent spectra, reveal that convergence in nonrotating simulations may be achieved at resolutions not much higher than these considered here. The flow is highly anisotropic, with the energy contained in horizontal divergent motions exceeding their radial counterpart by more than three orders of magnitude. By contrast, in rotating simulations, the largest energy is in the toroidal part of the horizontal motions. As the grid resolution increases, the turbulent correlations change in such a way that a solar-like differential rotation, obtained in the simulation with the coarser grid, transitions to an antisolar differential rotation. The reason for this change is the contribution of the effective viscosity to the balance of the forces driving large-scale flows. As the effective viscosity decreases, the angular momentum balance improves, yet the force balance in the meridional direction lessens, favoring a strong meridional flow that advects angular momentum toward the poles. The results suggest that obtaining the correct distribution of angular momentum may not be a mere issue of numerical resolution. Accounting for additional physics, such as magnetism or the near-surface shear layer, may be necessary in simulating the solar interior.
MeV–GeV Gamma-Ray Emission from SNR G327.1–1.1 Discovered by the Fermi-LAT
Authors: Eagle Jordan , Castro Daniel , Temim Tea , Ballet Jean , Slane Patrick , Gelfand Joseph , Kerr Matthew , Ajello Marco 
Published: November 2022

Abstract
We report the discovery of MeV–GeV γ-ray emission by the Fermi-LAT positionally coincident with the TeV pulsar wind nebula (PWN) HESS J1554–550 within the host supernova remnant (SNR) G327.1–1.1. The γ-ray emission is point-like and faint but significant (>4σ) in the 300 MeV–2 TeV energy range. We report here the Fermi-LAT analysis of the observed γ-ray emission followed by a detailed multiwavelength investigation to understand the nature of the emission. The central pulsar powering the PWN within G327.1–1.1 has not been detected in any wave band; however, it is likely embedded within the X-ray nebula, which is displaced from the center of the radio nebula. The γ-ray emission is faint and therefore a pulsation search to determine if the pulsar may be contributing is not feasible. Prior detailed multiwavelength reports revealed an SNR system that is old, τ ∼ 18,000 yr, where the interaction of the reverse shock with the PWN is underway or has recently occurred. We find that the γ-ray emission agrees remarkably well with a detailed broadband model constructed in a prior report based on independent hydrodynamical and semianalytic simulations of an evolved PWN. We further investigate the physical implications of the model for the PWN evolutionary stage incorporating the new Fermi-LAT data and attempt to model the distinct particle components based on a spatial separation analysis of the displaced PWN counterparts.
Testing the Galaxy-collision-induced Formation Scenario for the Trail of Dark-matter-deficient Galaxies with the Susceptibility of Globular Clusters to the Tidal Force
Authors: Ogiya Go , van den Bosch Frank C. , Burkert Andreas , Kang Xi 
Published: November 2022

Abstract
It has been suggested that a trail of diffuse galaxies, including two dark-matter-deficient galaxies (DMDGs), in the vicinity of NGC 1052 formed because of a high-speed collision between two gas-rich dwarf galaxies, one bound to NGC 1052 and the other one on an unbound orbit. The collision compresses the gas reservoirs of the colliding galaxies, which in turn triggers a burst of star formation. In contrast, the dark matter and preexisting stars in the progenitor galaxies pass through it. Since the high pressures in the compressed gas are conducive to the formation of massive globular clusters (GCs), this scenario can explain the formation of DMDGs with large populations of massive GCs, consistent with the observations of NGC 1052-DF2 (DF2) and NGC 1052-DF4. A potential difficulty with this “mini bullet cluster” scenario is that the observed spatial distributions of GCs in DMDGs are extended. GCs experience dynamical friction causing their orbits to decay with time. Consequently, their distribution at formation should have been even more extended than that observed at present. Using a semianalytic model, we show that the observed positions and velocities of the GCs in DF2 imply that they must have formed at a radial distance of 5–10 kpc from the center of DF2. However, as we demonstrate, the scenario is difficult to reconcile with the fact that the strong tidal forces from NGC 1052 strip the extendedly distributed GCs from DF2, requiring 33–59 massive GCs to form at the collision to explain observations.
Les technologies numériques : des outils au potentiel inexploité pour faciliter les apprentissages des agriculteurs. Une étude de onze services numériques de conseil agricole au Burkina Faso
Authors: Alexandre Chloé 
Published: November 2022

En Afrique sub-saharienne, les agriculteurs font face à des problèmes complexes qui nécessitent qu’ils développent de nouvelles connaissances et compétences. Nous analysons comment les fournisseurs de conseil mobilisent les outils numériques pour répondre à ce besoin. Sur la base d’une étude de cas au Burkina Faso, nous montrons que seuls deux des onze services numériques étudiés ont été développés dans l’objectif de faciliter les apprentissages des agriculteurs. Si les fonctionnalités des services sont en ligne avec les visions des fournisseurs, aucun des services étudiés ne permet d’apporter aux agriculteurs des connaissances personnalisées à grande échelle. Nous discutons ces résultats sur la base de la littérature existante pour identifier des facteurs contribuant à expliquer cette situation. Nous proposons des pistes de recherche pour mieux comprendre les contraintes que rencontrent les fournisseurs de conseil numérique et explorer comment ces difficultés pourraient être levées pour faciliter à grande échelle les apprentissages des agriculteurs. Codes JEL : O33, O36, Q16
COVID−19−induced anxiety, depression and stress among healthcare professionals in Sri Lanka
Authors: Udayanga Lahiru , Perera Ayesha , Dissanayaka Lakchani 
Published: November 2022

Objective:
To assess the degree of anxiety, depression and stress due to the COVID-19 epidemic among healthcare professionals in Sri Lanka.

Methods:
Healthcare professionals from 6 selected government and private hospitals located in Gampaha District were recruited for the study. The socio-demographic factors, knowledge and attitudes of healthcare professionals on COVID-19 was collected through a self-administered questionnaire, while Depression, Anxiety and Stress Scale score was used to assess the psychological wellbeing. Descriptive statistics and binary logistic regression techniques were used for data analysis.

Results:
Totally 324 healthcare professionals were included and the respondents had a high overall level of knowledge towards COVID-19. Twenty-five percent of the respondents had different levels of anxiety, while 10.8% had mild depression, and 4.6% had moderate depression. Interestingly, 40.4% of the respondents had mild stress, and 11.1% had moderate stress. Young people (20-35 years), medical laboratory technologist and nursing officer, being quarantined, having a SARS-CoV-2-infected family member, involvement in COVID-19 patient care, and limited availability of personal protection equipment, were recognized as significant risk factors associated with anxiety, depression and stress.

Conclusions:
The healthcare professionals are high-risk groups to experience psychological impacts from COVID-19. Continuous monitoring and implementing appropriate intervention activities and provision of counseling support are highly recommended.