Miracle-dz/UniFAR-FTUs huggingface dataset:
Impact of Cu Electrode on Switching Behavior in a Cu/HfO2/Pt Structure and Resultant Cu Ion Diffusion

In a newly proposed switching device using polycrystalline HfO2 thin film with ion diffusion path, we have found that a Cu electrode could contribute to improved switching performance. Current–voltage measurements at room temperature revealed clear resistive switching, not accompanied by a forming process, in our Cu/HfO2/Pt structure. The current step difference from one state to the other one was in the order of 103–104, giving a sufficient on/off ratio. Voltage sweep polarity suggested that filamentary Cu paths were formed due to Cu ion diffusion and annihilated at the HfO2/Pt interface at reversed bias. This filament path formation and annihilation was the origin of the switching device performance.
Contexto y actividad física por género del profesorado de educación física

The study evaluated the context and physical activity in 82 physical education classes in primary school using the system for observing physical activity instruction time (SOFIT), comparing the conduct of classes by teachers according to gender , the statistical analysis carried out with the Student t test for independent samples showed that in the teaching context the teachers lean in their strategies towards the game as a didactic resource and the teachers tend towards physical conditioning, with more moderate physical activity practiced in directed classes by female teachers and more vigorous intensity by teachers.
Are Central Government Rules Okay? Assessing the Hidden Costs of Centralised Discipline for Municipal Borrowing

In the EU, the specialty municipal banks have been the traditional funding source besides tax sharing and governmental transfers for Local Governments (LGs). With the decentralization process, LGs experienced different market-based options so that banks were no longer the only source of funding. However, with the onset of the Eurozone crisis, public sector debt is no more risk-free, and the cost of borrowing became unstable over time. To minimise such risks, Central Governments forced LGs to adopt general principles of control of local borrowing. Previous studies evidenced that centralised controls affect unitary countries more than federations. This paper investigates the Centralised Discipline and Control Model to understand whether it generates hidden costs. For such a purpose, the paper compares municipal bonds against borrowing from banks in Italy, a European unitary country. This paper highlights the existence of hidden costs for Italian LGs because the Central Government set up an expensive system for controlling the entire public sector debt. Policy makers should pay particular attention to which model of control to adopt by considering their country’s specific characteristics and the potential impacts of the different models on them, according to the present economic circumstances.
Overcoming negative predictions of microRNA expressions to gemcitabine response with FOLFIRINOX in advanced pancreatic cancer patients

FOLFIRINOX is superior to gemcitabine in patients with pancreatic cancer, but this regimen is associated with toxicity and biomarkers for response are warranted. MicroRNAs can mediate drug resistance and could provide predictive information. Altered expressions of several microRNAs including miR-21-5p, miR-10b-5p and miR-34a-5p have been previously linked to a worse response to gemcitabine. We investigated the influence of expression levels in tumor tissue of those three microRNAs on outcome to FOLFIRINOX. Twenty-nine patients with sufficient formalin-fixed paraffin-embedded tumor tissue were identified. There was no significant association between high and low expression groups for these three microRNA. We conclude that polychemotherapy combination can overcome intrinsic negative prognostic factors.
Blockchain and extreme learning machine based spectrum management in cognitive radio networks

In recent times, spectrum sensing and spectrum management become a crucial design issue in cognitive radio networks (CRN). To improve the spectrum utilization in CRN, the secondary users (SUs) will try to utilize the spectrum resource when it is unoccupied by the authorized primary users (PUs). At the same time, blockchain principle has been introduced to efficiently identify the legitimate SUs and allocate the spectrum resource as per the demand specified by the SUs. In this view, this article presents a new machine learning (ML) with blockchain‐based spectrum management technique in CRN. The proposed model undergoes three processes, namely spectrum sensing, blockchain‐based spectrum access, and malicious user (MU) identification. Initially, ML‐based extreme learning machine (ELM) technique is applied for spectrum sensing. Then, the presented blockchain approach provides secured spectrum allocation for SUs. Finally, the MUs are identified and to be blocked from accessing the available spectrum resource. An extensive simulation analysis is carried out to ensure the goodness of the proposed model. The obtained results indicated that the proposed model has offered better performance compared with other methods. The experimental outcome stated that under the presence of −20 dB SNR, the proposed method has attained a maximum detection rate of 0.68, whereas the KNN and OR rule methods have demonstrated a minimum detection rate of 0.58 and 0.5, respectively.
Anaphylaxis in Children: Experience of an Egyptian Center

Introduction: Anaphylaxis is a potentially life threatening allergic reaction that is rapid in onset and multisystemic in nature. Distribution of anaphylaxis tends to fluctuate based on age, gender, race, geographical residence and socioeconomic status of the involved subjects. Diagnosis of anaphylaxis in children is generally underestimated particularly in developing countries, and when diagnosed, proper management is occasionally lacking. Aim of the study: to evaluate the frequency and pattern of anaphylaxis and mistakes in diagnosis and treatment among a group of Egyptian children and adolescents. Subjects and methods: This observational study was conducted over 6 months duration, from 1st of September 2019 to the end of February 2020, in Children’s hospital, Ain Shams University, Cairo, Egypt, on children presenting to emergency department (ED). Anaphylaxis frequency, presentation, triggers, diagnosis, management and long term follow up were assessed. Results: frequency rate of anaphylaxis among children and adolescents was 0.43% (80/18816) over a year. Sixty percent of patients were infants. Biphasic reactions were reported in 11.3% of patients. The commonest trigger was food (22.5%) followed by medications (8.8%). Epinephrine was given to all patients, in proper dosage and method in most occasions (78.7%). Long term management and follow up appointment were deficient. In conclusion: Anaphylaxis in children was relatively high, with food being the most common trigger. Diagnosis and early management of anaphylaxis was satisfactory, however, long term management and follow up were defective.
Number-resolved preparation of mesoscopic atomic ensembles

The analysis of entangled atomic ensembles and their application for interferometry beyond the standard quantum limit requires an accurate determination of the number of atoms. We present an accurate fluorescence detection technique for atoms that is fully integrated into an experimental apparatus for the production of many-particle entangled quantum states. Number-resolved fluorescence measurements with single-atom accuracy for 1 up to 30 atoms are presented. According to our noise analysis, we extrapolate that the single-atom accuracy extends to a limiting atom number of 390(20) atoms. We utilize the accurate atom number detection for a number stabilization of the laser-cooled atomic ensemble. For a target ensemble size of 7 atoms prepared on demand, we achieve a 92(2)% preparation fidelity and reach number fluctuations 18(1) dB below the shot noise level using real-time feedback on the magneto-optical trap.
Phase identification and control of thin films deposited by co-evaporation of elemental Cu, Zn, Sn, and Se

Kesterite thin films [(i.e., Cu2ZnSn(S,Se)4 and related alloys] have been the subject of recent interest for use as an absorber layer for thin film photovoltaics due to their high absorption coefficient (>104 cm−1), their similarity to successful chalcopyrites (like CuInxGa1−xSe2) in structure, and their earth-abundance. The process window for growing a single-phase kesterite film is narrow. In this work, we have documented, for our 9.15%-efficient kesterite co-evaporation process, (1) how appearance of certain undesirable phases are controlled via choice of processing conditions, (2) several techniques for identification of phases in these films with resolution adequate to discern changes that are important to device performance, and (3) reference measurements for those performing such phase identification. Data from x-ray diffraction, x-ray fluorescence, Raman scattering, scanning electron microscopy, energy dispersive spectroscopy, and current-voltage characterization are presented.
Silk fibroin and silk fibroin-gold nanoparticles nanocomposite films: sustainable adsorbents for methylene blue dye

Abstract In this paper, the preparation of silk fibroin (SF) and silk fibroin-gold nanoparticles (SF-AuNPs) nanocomposites (NC) and their adsorbability of methylene blue (MB) dye is reported. SF is used in this work as a template to reduce gold salt (HAuCl4.H2O) into AuNPs. The optical absorption displays the AuNPs in SF by showing a band at λ = 540 nm. The X-ray diffraction (XRD) and the transmission electron microscopy (TEM) study reveal the crystalline nature of the AuNPs. The TEM image indicates that the AuNPs are mostly spherical in shape with an average diameter of around 6.22 ± 1.28 nm. The scanning electron microscopy (SEM) and micrograph shows the AuNPs as uniformly dispersed in the SF. The samples are evaluated as novel adsorbents, and influencing factors like solution pH, contact time, and kinetic models are investigated. The adsorption kinetics validates the practicality of the pseudo-second-order kinetics by best linear fit (R 2=0.987 for SF film) and (R 2=0.989 for SF-AuNPs NC film). The Langmuir and Freundlich isothermal models used in the study, maximum adsorption capacity for the dye is estimated to be 263.15 mg g−1 (SF) and 313.47 mg g−1 (SF-AuNPs). The decolorization percentage is about 95.62% (SF) and 98.66% (SF-AuNPs). The recycle tests demonstrate that the samples can be reused four times with removal efficiency of more than 80%. The results suggest that the SF and SF-AuNPs films can be used as efficient sorbents for MB dye removal from a solution. Graphical Abstract
Modelling the influence of culture on Entrepreneurial competencies and business success of the women micro entrepreneurs in the informal sector of the economy

The study examines the effect of culture on the relationship between the dimensions of Entrepreneurial competencies and business success of informal women micro-entrepreneurs in the northwest geopolitical zone of Nigeria. The study involves both descriptive and inferential statistics. With a random sample of 361 respondents, collected from a population of women micro-entrepreneurs, through the use of questionnaire, the obtained data were analyzed with a variance-based structural equation modelling, PLS-SEM. Findings revealed that opportunity, relationship, strategic, and organising competencies all have a positive and significant impact on business success of informal women micro-entrepreneurs in northwest Nigeria. Also, culture was found to moderate the relationship between relationship competencies and business success of women micro-entrepreneurs. These findings shows that any developmental programmes geared towards enhancing the performance of informal women micro-entrepreneurs in northwest Nigeria should focus on improving their entrepreneurial competencies, and the study practically illustrates the importance of interpersonal relations, such as, social interactions, and networking activities in the business success of informal women micro-entrepreneurs.
Development of a Rigorously Designed Procedural Checklist for Assessment of Emergency Medicine Resident Performance of Temporary Transvenous Cardiac Pacing

Temporary transvenous cardiac pacing (TVP) is a potentially lifesaving intervention included in the list of essential core procedures for emergency medicine (EM) training; however, opportunities to perform TVP during residency cannot be guaranteed. EM graduates report feeling subjectively underprepared for this procedure, but objective performance data are lacking. Checklist‐based simulated assessment is an increasing focus of competency‐based medical education, particularly for invasive procedures like TVP. The objectives of this paper were as follows: first, to enlist a multidisciplinary team of experts to create an assessment tool for TVP using best practices in checklist development; second, to determine the reliability of checklist scoring; and third, to assess EM residents’ baseline ability to perform TVP using a dedicated task trainer.
Electromagnetic Characteristic Analysis of Permanent Magnet Synchronous Machine Considering Current Waveform According to Static Rotor Eccentricity

In this study, we performed an electromagnetic characteristic analysis of a permanent magnet synchronous machine considering the current waveform based on static rotor eccentricity. First, the characteristics of the back electromotive force were analyzed through the no-load analysis of the analysis model according to static rotor eccentricity. Next, a dynamic analysis was performed through mathematical modeling of a permanent magnet synchronous motor and PWM method. The input current during operation was derived through the dynamic analysis, and the core loss analysis was performed using derived input current. The core loss analysis was performed using the case where the fundamental wave current was applied and the input current derived through the dynamic analysis, and the results were compared.
Presentation of the Results of the Survey on the Importance of Leadership Competences in the Logistics Industry

The aim of the article is to present the most important, according to logistics practitioners, leadership competences in logistics. The competences examined come from the Dynamic Leadership Model of SGH Warsaw School of Economics, developed by the Institute of Human Capital under the guidance of Professor Tomasz Rostkowski. The research was conducted from September to November 2018 using an online survey addressed to managers and executives in the logistics industry. The paper presents the most important competences in logistics according to the respondents: business orientation, building relations and cooperation, sharing experience, creating changes and decision making.
Exploration of an Integrated Active Learning Strategy to Balance Student Workload in a Mixed Level Research Methods Course

This article was migrated. The article was marked as recommended. Team Base Learning (TBL) and Process Oriented Guided Inquiry Learning (POGIL) are two very distinct active learning and teaching pedagogies, both of which focus on team interactions to facilitate learning. TBL and POGIL literature have both been remiss in addressing their applicability in solving workload imbalance within the team paradigms respective of their individual pedagogy. In this study, we merged integral components of both TBL and POGIL teaching strategies to address perceived imbalance in student workload that were revealed through analysis of initial course evaluations from a mixed level (masters and doctoral level students) Research Methods course. As a result of findings from analyses of initial course evaluations, teams were established based on the integration of TBL and POGIL components in the subsequent course offering.
The BRI and China’s Soft Power in Europe: Why Chinese Narratives (Initially) Won

The article aims to contribute to our understanding of China’s soft power in Europe and the impact of the Belt and Road Initiative (BRI) in this regard. We conduct analyses of two leading newspapers in the United Kingdom, in Spain, and in Poland to discover how the BRI was framed there in the period from mid-2013 to mid-2017. The empirical results show that the media reported about the initiative quite positively – especially compared to the general media picture of China in Europe – and to a considerable extent followed Chinese narratives of economic opportunities while overlooking geopolitical and security worries. Theories of “journalistic routines” and linguistic “affective sticking points” will be suggested as possible explanations of these dynamics, highlighting both the fact that Chinese narratives outnumbered European ones in the initial period quantitatively, and were able to offer something that resonated with the audience qualitatively.
Novel superabsorbent cellulose‐based hydrogels crosslinked with citric acid

This work is focused on the preparation of new environmentally friendly hydrogels derived from cellulose and hence originating from renewable resources and characterized by biodegradable properties. Two cellulose derivatives, sodium carboxymethylcellulose (CMCNa) and hydroxyethylcellulose (HEC), were used for superabsorbent hydrogel preparation. Citric acid (CA), a crosslinking agent able to overcome toxicity and costs associated with other crosslinking reagents, was selected in a heat activated reaction. Differential scanning calorimeter (DSC), fourier transform infrared spectroscopy (FTIR), and swelling measurements were performed during the reaction progress to investigate the CA reactivity with each of the polymers. Also, CMCNa/HEC polymer mixtures (3/1 w/w) crosslinked with CA were investigated and compared with previous results. Finally, a possible reaction mechanism was proposed. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Behavior of Peruvian carrot (Arracacia xanthorrhiza) and cassava (Manihot esculenta) starches subjected to heat‐moisture treatment

Peruvian carrot and cassava starches were isolated, adjusted to 30 and 35% moisture, and heated at 90°C for 8 h. Structural and physicochemical characteristics of the treated starches were evaluated and compared. High performance anion exchange chromatography with pulsed amperometric detector (HPAEC-PAD), gel permeation chromatography (GPC), and amylose content, revealed that the HMT did not change the chemical structures of the starches. A large agglomeration of granules was observed from SEM, particularly in the Peruvian carrot starch. Crystalline patterns in Peruvian carrot and cassava starches changed from B to C and CA to A, respectively. Relative crystallinity decreased from 30 to 25% in Peruvian Carrot starch, and increased from 35 to 37% in cassava starch adjusted to 30% moisture. SF and peak viscosity decreased, breakdown was almost completely eliminated (particularly in the Peruvian carrot starch), and final viscosity increased. WAI and WSI increased as moisture levels of both starches increased. Gelatinization temperatures increased and enthalpy decreased. Degrees of gelatinization increased as the moisture level increased, reaching 33 and 72% in the cassava and Peruvian carrot starches, respectively. HMT strengthened the intra- and intermolecular interactions of starches and increased their stability during heating and shearing, but also caused a partial gelatinization in the starches, particularly in Peruvian carrot starch.
Sistemas de recuperación de información implementados a partir de CORD-19: herramientas clave en la gestión de la información sobre COVID-19

La investigación sobre el coronavirus ha generado una producción de documentos científicos extraordinaria Su tratamiento y asimilación por parte de la comunidad científica ha necesitado de la ayuda de sistemas de recuperación de información diseñados específicamente Algunas de las principales instituciones mundiales dedicadas a la lucha contra la pandemia han desarrollado el conjunto de datos CORD-19 que destaca sobre otros proyectos de similar naturaleza Los documentos recopilados en esta fuente han sido procesados por distintas herramientas de recuperación de información, a veces prototipos o sistemas que ya estaban implementados Se ha analizado la tipología y características principales de estos sistemas concluyendo que hay tres grandes categorías no excluyentes entre ellas: búsqueda terminológica, visualización de información y procesamiento de lenguaje natural Destaca enormemente que la gran mayoría de ellos emplean preferentemente tecnologías de búsqueda semántica con el objeto de facilitar la adquisición de conocimiento s los investigadores y ayudarlas en su ingente tarea La crisis provocada por la pandemia ha sido aprovechada por los buscadores semánticos para encontrar su sitio Alternate abstract:Research on the coronavirus has generated an extraordinary production of scientific documents Their treatment and assimilation by the scientific community has required the help of specifically designed information retrieval systems Some of the world's leading institutions involved in the fight against the pandemic have developed the CORD-19 dataset that stands out from other projects of a similar nature The documents collected in this source have been processed by various information retrieval tools, sometimes prototypes or previously implemented systems The typology and main characteristics of these systems have been analysed, concluding that there are three main non-exclusive categories among them: terminological search, information visualisation and natural language processing It should be noted that most of them use semantic search technologies in order to facilitate the acquisition of knowledge by researchers and to help them in their enormous task The crisis caused by the pandemic has been taken advantage of by semantic search engines to find their site
Intégration monétaire dans la Communauté de Développement d’Afrique Australe (SADC) : contraintes et perspectives

Dans la presente etude, il a ete question d’evaluer d’un point de vue purement economique l’opportunite d’une monnaie unique au sein de la Communaute de Developpement d’Afrique Australe (SADC en sigle) dans le contexte actuel ; dans le but de rendre compte du degre des (a)symetries des cycles economiques encore dans la region. Apres investigation d’apres l’approche de la theorie des Zones Monetaires Optimales (ZMO) grâce a la methode structuraliste et aux techniques documentaire, statistique et econometrique ; nos resultats ne plaident pas en faveur d’une union monetaire dans la configuration actuelle de la SADC. De ce fait, l’auteur propose un elargissement progressif et selectif de la Zone Monetaire Commune (CMA), consideree jusque-la comme le centre de l’union monetaire a venir, a quelques pays comme l’Angola, la R.D. Congo et la Tanzanie dont les cycles economiques sont symetriques a celui de l’Afrique du Sud.
The Combination of Simultaneous Plasma Treatment with Mg Nanoparticles Deposition Technique for Better Mung Bean Seeds Germination

A novel method based on the combination of simultaneous cold plasma treatment with Mg nanoparticles deposition, applied to Mung bean seeds by improving their quality, is presented. The SRIM simulation reveals that only the very top layer of the seeds surface can be altered by the plasma. The experimental analysis indicates surface composition changes with a polar groups formation. These groups initiate the shift of surface characteristics from hydrophobic to hydrophilic. The chemical bond analysis shows the formation of MgO and Mg(OH)2 compounds, which acts as a positive factor for seeds germination and growth. The germination experiments showed a 70% outcome with an average of 73.9 mm sprouts length after 30 min of plasma treatment compared to the initial seeds (40% outcome and 71.3 mm sprouts length).