bluuebunny/crossref_metadata_2025 huggingface dataset:
Physiological demands and motion analysis of elite foil fencing
Authors: Bottoms Lindsay , Tarragó Rafael , Muñiz Daniel , Chaverri Diego , Irurtia Alfredo , Castizo-Olier Jorge , Carrasco Marta , Rodríguez Ferran A. , Iglesias Xavier
Published: February 2023

The aim of this study was to determine the physiological demands and motion analysis of a simulated fencing competition. Eighteen fencers each completed 5 ‘poule’ (5 touches) and ‘direct elimination (DE)’ (15 touches) fights. Expired gases were measured during 1 poule and DE fight. Heart rate (HR), ratings of perceived exertion (RPE) and movement data were recorded throughout all fights. Motion analysis was undertaken using the software LINCE PLUS. Differences between poule and DE fights were determined by either a paired t-test or a one-way repeated measures ANOVA. HR and RPE were significantly greater during DE compared to poule (170 ±10 vs 163 ±13 beats·min-1; P<0.05). A greater distance was covered during a DE fight compared to a poule fight (459.9 ± 117.7 m vs 162.6 ± 74.2 m; P<0.05). The average values of V.O2max were 42.5 ±5.6 ml·kg-1·min-1 in men and 34.4 ±3.2 ml·kg-1·min-1 in women. Work-to-rest ratios reduced during the DE fights along with a lower average speed and increased max speed (11.7 ± 2.8 km∙h-1 vs 9.6 ± 1.6 km∙h-1; P<0.05). In conclusion, there is an increased physiological demand during a DE fight accompanied by a reduction in average speed and decreased work-to-rest ratio.
Intraspecific variability of the saccular and utricular otoliths of the hatchetfish Argyropelecus hemigymnus (Cocco, 1829) from the Strait of Messina (Central Mediterranean Sea)
Authors: D’Iglio Claudio , Famulari Sergio , Albano Marco , Carnevale Alex , Di Fresco Dario , Costanzo Mariachiara , Lanteri Giovanni , Spanò Nunziacarla , Savoca Serena , Capillo Gioele
Published: February 2023

Mesopelagic species are enjoining increasing attention due to the growing impact of fisheries activities on deep marine biocenosis. Improving the knowledge base on mesopelagic species is required to enhance their conservation due to the knowledge gaps regarding many species and families. In this context, otoliths can be fundamental to assessing their life history, ecomorphological adaptation to the deep environment and stock composition. The present paper aims to explore the saccular and utricular otoliths morphology and intra-specific variability of the hatchetfish, Argyropelecus hemigymnus, from the Strait of Messina. Lapilli and sagittae were collected from 70 specimens and separated into four size classes. Morphometric, shape and SEM investigations were performed to describe their morphology, contours, and external structural organization, also studying their intraspecific variability related to sample sizes and differences between otolith pairs. Results showed an otolith morphology different from those reported in the literature with fluctuating asymmetry in sagittae and lapilli belonging to Class IV, and a high otolith variability between all the size classes. Data herein described confirm the otoliths singularity of the population from the Strait of Messina, shaped by a unique marine environment for oceanographic and ecological features.
Whole-genome sequencing of Histophilus somni strains isolated in Russia
Authors: Yatsentyuk Svetlana , Pobolelova Julia , Gordeeva Veronika , Timofeeva Irina
Published: February 2023

Background and Aim: Histophilus somni is a Gram-negative bacterium belonging to the Pasteurellaceae family that can cause bovine histophilosis. Histophilus may act as a commensal or opportunistic bacterial cattle pathogen. Comparing genomes of the pathogenic strain 2336 with the non-pathogenic preputial 129Pt isolate revealed some putative virulence factors. The study of the complete genomes of H. somni strains circulating in Russia has never been conducted before. This study aimed to identify genetic features of the H. somni strains isolated in Russia and evaluate the possibility of using strains for vaccine development.

Materials and Methods: Three strains of H. somni were isolated from different sources. Strain 188-VIEV was isolated from a vaginal swab sample of cattle with endometritis. 532-VIEV and 551-VIEV were cultured from the cryopreserved bull semen samples imported from Canada. Histophilus somni strain ATCC 700025 provided by ATCC (American Type Culture Collection) was also used in the study. DNA extraction was performed using QIAamp DNA Mini Kit (QIAGEN, USA). The whole-genome sequencing of the four strains was performed using Illumina Miseq. The comparison of the resulting sequences with the complete genomes of H. somni 2336 and 129Pt, and detection of the resistance genes and virulence factors, was performed using the ResFinder and Virulence Factor Database web services.

Results: The genome size of the samples varied from 1.9 to 2.3 Mb. The number of coding sequences varied from 1795 to 2256. The average sequence density was 90%. The total guanine-cytosine (GC) content was 36.8%–37.2%, which coincided with data previously obtained for H. somni. Three out of four studied strains encoded putative virulence factors such as filamentous hemagglutinin homologs, lipooligosaccharide biosynthesis proteins, and proteins involved in iron transport and utilization. The Ser83Ile substitution was identified in the DNA topoisomerase II (gyrA) in H. somni strains 532-VIEV and 551-VIEV cultured from bull semen which led to resistance to fluoroquinolones. The gene (AAC-6-Ia + APH-2”) encoding a bifunctional aminoglycoside modification enzyme was detected in strain 551-VIEV.

Conclusion: Strains with virulence genes identified could be candidates for designing vaccines and potentially represent antigen sources. The results show that antibiotic-resistant H. somni can be spread with semen used for artificial insemination.
Kötődés, iskolai és pedagógiai kötődés
Authors: Zsolnai Anikó
Published: February 2023

A személyiség szociális viselkedését alapvetően meghatározzák a
gyermekkorban létrejövő kötődési kapcsolatok. A családban kialakuló erős
kötelékek, főként az anya-gyerek közti kötődés alapozza meg, hogy milyen
lesz a gyermek szociális viselkedése a későbbiekben. A kötődések
vizsgálatával foglalkozó kutatók között nincs teljes egyetértés abban, hogy
az elsődleges kötődési kapcsolat mennyire meghatározó a későbbi kötődések
alakulására. Számos kutatás azt mutatja, hogy a korai kötődési mintázat a
környezet hatására megváltozhat, ezért meg is változtatható. Így egy
biztonságot nyújtó iskolai környezetben és pedagógus által elősegíthető,
támogatható a pozitív irányuló módosulás. A pedagógiának kiemelt feladatává
kellene válnia, hogy megismerje az iskolás korú gyerekek kötődéseit és a
kötődések alakulását befolyásoló tényezőket. A hazai pedagógiai kutatások
azonban néhány kivételtől eltekintve eddig nem fordítottak kellő figyelmet
a gyermekkori kötődések vizsgálatára, így a pedagógusok nagyon kevés
tudással rendelkeznek erről a kérdéskörről.
Nagy Józsefre emlékezünk
Authors: Józsa Krisztián , Zsolnai Anikó
Published: February 2023

Ezzel a tematikus számmal Nagy József (1930. november 22. – 2021.
június 20.) professzor úrra emlékezünk halálának első évfordulója
alkalmából. E folyóiratszám tanulmányai Nagy József munkásságának egy-egy
szeletéhez kötődnek, a szerzők tudományos szempontból dolgozzák fel a
választott témájukat, de az írások egyben személyes hangvételű
megemlékezések is.
EEG authentication based on deep learning of triplet loss
Authors: Cui Jun , Su Lei , Wei Ran , Li Guangxu , Hu Hongwei , Dang Xin
Published: February 2023

As a novel biometric characteristic, the electroencephalogram (EEG) is used for biometric authentication. To solve the challenge of efficiently growing the number of classifications in traditional classification networks and to increase the practicality of engineering, this paper proposes an authentication approach for EEG data based on an attention mechanism and a triplet loss function. The method begins by feeding EEG signals into a deep convolutional network, maps them to 512-dimensional Euclidean space using a long short-term memory network combined with an attention mechanism, and obtains feature vectors for EEG signals with identity information; it then adjusts the network parameters using a triplet loss function, such that the Euclidean distance between feature vectors of similar signals decreases while the distance between signals of a different type increases. Finally, the recognition method is evaluated using publicly available EEG data sets. The experimental results suggest that the method maintains the recognition rate while effectively expanding the classifications of the model, hence thus boosting the practicability of EEG authentication.
Kepler métaphysicien
Authors: Mehl Édouard
Published: February 2023

Cet article entreprend de déterminer la situation métaphysique de la science keplérienne, et distingue trois phases de son évolution: a) une phase initiale, programmatique, où l’astronomie copernicienne veut faire office de théologie naturelle, et où, réciproquement, la théologie doit servir de sanction aux nouvelles hypothèses; b) une phase intermédiaire, où l’astronomie copernicienne ne cherche plus à se fonder dans un arrière-monde métaphysique, mais dans les causes naturelles des mouvements célestes; c) une phase terminale, postérieure à la découverte de la loi des temps périodiques, où Kepler renonce au projet initial de faire jouer à l’astronomie ou «physique céleste» une fonction ancillaire. Cette physique céleste n’est pas une théologie naturelle, mais une théologie naturalisée.
***
This article tries to determine the metaphysical situation of Keplerian science, and distinguishes three phases of its evolution: a. an initial, programmatic phase, where Copernican astronomy wants to serve as a natural theology, and where, reciprocally, theology must serve as a sanction to the new hypotheses; b. an intermediate phase, where Copernican astronomy no longer seeks to be founded in a metaphysical back-world, but in the natural causes of celestial movements; c. a terminal phase, after the discovery of the law of periodic time, where Kepler renounces the initial project of making astronomy or “celestial physics” play an ancillary function. This celestial physics is not a natural theology, but a naturalized theology.
Towards an extended notion of Common Ground in aphasiology
Authors: Graci Roberto
Published: February 2023

This article aims to analyze the evolution of the Common Ground notion in theoretical and sociocognitive fields. Some recent studies from psychology, cognitive sciences, and socio-linguistics have enriched the traditional formulations on CG by analyzing various factors related to the nature of mental processes. It emerged that CG is a dynamic entity where sources of different nature interact in a complex way during the communication process. On the other hand, contemporary clinical investigations on CG and aphasia seem to overlook the multiple and dynamic factors involved in the communication between patients and ordinary speakers. Although most experimental studies prove that any form of knowledge can, in principle, support communication with aphasic patients, it seems that they focus their attention only on an isolated aspect of the situational or past context. A general theory that explains how personal, cultural, or perceptual knowledge jointly mediates the understanding of texts produced by aphasic patients is missing. This work does not intend to offer such a theory. Instead, it has the less ambitious purpose of highlighting the current limitations related to the practice of breaking down and analyzing isolated features of the CG. Highlighting these limitations is essential in pushing aphasiology research towards introducing more complex models of CG adhering to the reality of the facts.
A Dialogized Monologue: A Study of Gu Hongming’s Letters to Richard Wilhelm
Authors: Wu Siyuan
Published: February 2023

This paper examines the twenty-one letters from a Chinese scholar Gu Hongming to a German Sinologist Richard Wilhelm. It is essential to empower the right of speech on the side of Wilhelm by restoring a dialogic discourse from the epistolary space and revealing the innate nature of polemic in Gu’s internally dialogized publications. Their interconnected cultural and social activities represented in these letters may all be regarded as concrete rejoinders that signify their meanings and are signified by their previous context. The interaction between Gu and Wilhelm has cast a far-reaching impact on their developments in either academic thoughts or cultural identities, so much so that only by perceiving their reciprocally infiltrated ideas and related activities in coexistence are we able to understand their richer and fuller personalities developing along a mutual reference line and in a context of an unfinalized dialogue.
Relay fusion frames in Banach spaces
Authors: Hong Guoqing , Li Pengtong
Published: February 2023

The relay fusion frames have been recently introduced in Hilbert spaces to model sensor relay networks and distributed sensor relay systems, which are deeply connected with compressed sensing. In this article, we introduce the notions of relay fusion frames and Banach relay fusion frames in Banach spaces and study certain attractive properties of relay fusion frames in this more general setting. In a particular sense, Schauder frames can be shown to be a special case of relay fusion frames. Moreover, the stability issue of relay fusion frames and Banach relay fusion frames will be addressed.
On the uniqueness of limit cycles for generalized Liénard systems
Authors: Zhou Hui , Yuan Yueding
Published: February 2023

In this article, the general Liénard system

d
x

d
t

=
ϕ

(

y

)

−
F

(

x

)

,

d
y

d
t

=
−
g

(

x

)

\left\{\begin{array}{l}\frac{{\rm{d}}x}{{\rm{d}}t}=\phi (y)-F\left(x),\\ \frac{{\rm{d}}y}{{\rm{d}}t}=-g\left(x)\end{array}\right.

is studied. By using the Filippov transformation, combined with the careful estimation of divergence along the closed orbit, we prove the sufficient conditions for the uniqueness of limit cycles in this system. Our results extend almost all the related existing studies on the Liénard system.
The crystal structure of 1-((1-methyl-1H-1,2,4-triazol-3-yl) methyl)-3-(2,4,5-trifluorobenzyl)-1,3,5-triazinane-2,4,6-trione, C14H11F3N6O3
Authors: Du Yi-Jing , Sun Hong-Shun , Wang Jian-Qiang , Xu Jia-Ying
Published: February 2023

C14H11F3N6O3, orthorhombic, Pbca (no. 61), a = 8.08620(10) Å, b = 15.4730(2) Å, c = 23.5892(2) Å, V = 2951.43(6) Å3, Z = 8, R

gt
(F) = 0.0463, wR

ref
(F
2) = 0.1395, T = 293 K.
Die Geteiltheit virtueller Situationen
Authors: Roth Philip , Laut Christina
Published: February 2023

Kommunikation ist das Rückgrat vieler organisationaler Prozesse. Gegenwärtig findet eine zunehmende Virtualisierung dieser Kommunikationsprozesse statt. In der bisherigen Forschung dazu wurde primär auf virtuelle Kommunikationskanäle fokussiert. Soziologische Kommunikationstheorien unterstreichen jedoch, dass Kommunikation durch geteilte Situationsdefinitionen gerahmt wird. Da diese Theorien aber von leibhaftiger Kopräsenz ausgehen, ist unklar, inwiefern soziale Situationen auch virtuell geteilt werden. In unserem Beitrag zeigen wir im systematischen Vergleich von face-to-face Kommunikation und softwaregestützter Videotelefonie, welche Aspekte von Situationen unter den jeweiligen Kommunikationsbedingungen geteilt werden und wie sich die jeweilige Situiertheit auf Kommunikation auswirkt. Diese Analyse macht deutlich, wie eine zunehmende Virtualisierung besonders relevante Formen organisationaler Kommunikation verändert. Der Beitrag trägt somit dazu bei, das soziologische Konzept der sozialen Situation für virtuelle Situationen zu öffnen.
SURFACE PLASMON RESONANCE IN As2Se3 PLANAR WAVEGUIDES FOR THE IR SPECTRAL REGION
Authors:   National R&D Institute for Optoelectronics, INOE 2000, 409 Atomistilor str., PO BOX MG. 5, 77125 Magurele, Ilfov, Romania, POPESCU A. A. , SAVASTRU D. ,   National R&D Institute for Optoelectronics, INOE 2000, 409 Atomistilor str., PO BOX MG. 5, 77125 Magurele, Ilfov, Romania, BASCHIR L. ,   National R&D Institute for Optoelectronics, INOE 2000, 409 Atomistilor str., PO BOX MG. 5, 77125 Magurele, Ilfov, Romania, VERLAN V. V. ,   Institute of Applied Physics, Academy of Sciences of Moldova, 5 Academiei str. Chisinau, MD-2028, R. of Moldova, BORDIAN O. ,   Institute of Applied Physics, Academy of Sciences of Moldova, 5 Academiei str. Chisinau, MD-2028, R. of Moldova, STAFE M. ,   Department of Physics, University Politehnica of Bucharest, Splaiul Independentei 313, 060042 Bucharest, Romania, PUSCAS N. ,   Department of Physics, University Politehnica of Bucharest, Splaiul Independentei 313, 060042 Bucharest, Romania
Published: February 2023

The surface plasmon resonance (SPR) four layers configuration that contains prism of BK7-gold metal film-As2Se3 waveguide-air was realized. As2Se3 thin films with low roughness were obtained by thermal evaporation using cvasi-closed evaporator. The surface roughness’s was less than 2.5 nm. The SPR curves shape calculated by MATLAB solver were identical to these one calculated by matrix method. The As2Se3 films were characterized by ellipsometric spectroscopy and the obtained optical constants were used for calculations. Experimentally obtained SPR curves at the 1064 nm wavelength shown sharp resonance and are in accordance with calculus.
THEORETICAL INVESTIGATION OF MOLECULAR STRUCTURE, HOMOLUMO, HYPERPOLARIZABILITY, NBO ANALYSIS AND DENSITY OF STATES CALCULATION OF BUTENAFINE
Authors:   Department of Physics, Sri Eshwar College of Engineering, Coimbatore, India, SANGEETHA R.K. , AYYAPPAN S. ,   Department of Physics, Government College of Technology, Coimbatore, India
Published: February 2023

Molecular geometry vibrational wave number of butenafine was investigated using HartreeFock and DFT method with HF and B3LYP/6-31+G(d,p) basis set. The potential energy distribution of the vibrational wave number is found to be in good agreement with experimental values. A detailed NBO analysis of butenafine was done with B3LYP method. U-V visible absorption spectra of the titled molecule is calculated by PCM model using water as solvent. The U-V visible spectra of the titled molecule dissolved in water were recorded in the range of 200-900 nm. The calculated values of U-V spectra are the most reproduced experimental data. The density of states, Homo-lumo and electrostatic potentials were calculated and analyzed. The dipole moment and hyperpolarizability result shows the butenafine has non linear optical properties. The natural bonding analysis was calculated by HF and B3LYP method.
DESIGN AND OPTIMIZATION OF PLATINIUM HEATERS FOR GAS SENSOR APPLICATIONS
Authors:   MoDERNa laboratory, Department of Sciences and Technology, University of Frères Mentouri, Constantine 1, Constantine, Algeria, ABDESLAM A. A. , FOUAD K. ,   MoDERNa laboratory, Department of Sciences and Technology, University of Frères Mentouri, Constantine 1, Constantine, Algeria, KHALIFA A. ,   IM2NP Laboratory, Aix Marseille Univ, Université de Toulon, Marseille, France
Published: February 2023

A new bridge-type micro-hotplates (MHP) for semi-conducting metal oxide (SMO) gas sensor is investigated and its numerical study is simulated using Finite Element Method. the boundary conditions of the thermal properties have been calculated. The proposed MHP has been designed for low power consumption and uniform temperature distribution throughout the active area of 240 µm × 240 µm. To validate our simulation, we compared the results with the experimental data, reported by Iwata et al. The power consumption of the heater is approximately corresponded to 13.5 mW for heating to 300°C (heat transfer coefficients calculated), we noticed a reduction of power consumption by more than 8 mW compared to our first simulation (standard heat transfer coefficient parameters) which proves the impact of heat transfer coefficients on power consumption. Also, overheating problem in the heater center is analyzed, several modifications on the MHP center design have been established to keep the best temperature homogeneity, results show that temperature gap between extremities and the center of the active area is reduced by less than 15 °C.
ELECTRICAL PROPERTIES OF CdxSe1-x FILMS AT DIFFERENT THICKNESS AND ANNEALING TEMPERATURES
Authors:   Department of Physics, College of Science, University of Baghdad, Baghdad, Iraq, AL-LAMY H. KH. , NASIR E. M. ,   Department of Physics, College of Science, University of Baghdad, Baghdad, Iraq, ABDUL-AMEER H. J. ,   Department of Physics, College of Science, University of Baghdad, Baghdad, Iraq
Published: February 2023

CdxSe1-xalloy has been prepared successfully. The prepared alloy were used to produce CdxSe1-x films. CdxSe1-x films with different thickness (0.5, 1, 1.5, 2)μm have been prepared by thermal evaporation on glass substrates. The deposited films have been annealed at different temperatures (373, 423 and 473)K. From studying the electrical properties of CdxSe1-xfilms deposited on glass with different thickness and annealing temperature, we found that D.C conductivity increases from 1.511 × 10-5 to 67.6 × 10-5 (Ω.cm)-1 at R.T with thickness increasing (0.5–2)μm and decreases from 1.511 × 10-5 to 1.4×10-7 (Ω.cm)-1 with increasing of annealing temperatures (R.T–473)K for 0.5μm thick. There are two activation energies for D.C conductivity Ea1 and Ea2 decrease from 0.151 to 0.107 eV and from 0.446 to 0.188 eV at R.T, respectively, with increasing of thickness form 0.5 to 2μm. Ea1 and Ea2 increase from 0.151 to 0.231 eV and from 0.446 to 0.570 eV at 0.5 μm thick, respectively, with increasing of annealing temperatures (R.T–473)K. Hall measurements confirmed that all the intrinsic films are n-type, carriers concentration decreases from 11.16 × 1014 cm-3 to 8.333 × 1014 cm-3 at R.T with increasing of thickness (0.5–2)μm, and decrease form 1.116 × 1015 cm-3 to 0.096 × 1014 cm-3 for 0.5μm thick with increasing of annealing temperatures (R.T– 473)K. The mobility is found to increase with increasing of thickness and annealing temperatures. The drift velocity (Vd), carrier lifetime () and mean free path (ℓ) increase with increasing of annealing temperatures and thickness.A.C conductivity measurements for CdxSe1-xfilms with different thickness and annealing temperatures consistent with correlated barrier hopping model (CBH).
Fe (PB)-P-Se NANOCUBES AS HER ELECTROCATALYSTS FOR OVERALL EFFICIENT WATER-SPLITTING
Authors:   Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, PR People’s Republic of China, AHMED M. , LAKHAN M. N. ,   Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, PR People’s Republic of China, TIAN Y. ,   Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, PR People’s Republic of China, SHAR A. H. ,   Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, PR People’s Republic of China, YU J. ,   Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, PR People’s Republic of China, ALI I. ,   College of Chemical Engineering, Beijing University of Chemical Technology, PR People’s Republic of China, LIU J. ,   Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, PR People’s Republic of China, WANG J. ,   Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, Harbin Engineering University, PR People’s Republic of China
Published: February 2023

In recent times, selecting an effective electrocatalyst has attracted a lot of attention for improving the efficiency of water splitting to obtain clean fuels as an energy carrier. In this study, a self-pattern strategy is reported to synthesize Selenide (Se)-Phosphate (P) mixed Prussian blue (PB) cubic nanocubes for the electrocatalytic hydrogen evolution reaction (HER). The as-prepared nanocubes were characterized by different techniques. SEM and TEM confirm that the nanocube structure has been successfully formed. XRD pattern obtained peaks meets with the standard JCPDS no. 01-0239.The resulting P-Se mixed nanocubes worked as a superior HER electrocatalyst, which affords a current density of 10 mA cm−2 at a small overpotential of 210mV; at the overpotential of 211mV; a Tafel slope as 147 mV/dec in 1M KOH; and excellent stability in alkaline medium. From results, we affirmed that Prussian based nanocubes can work with great potential in water splitting.
MODELING OF THE CHEMICAL X-PARAMETER IN PSEUDOBINARY ALLOYS FROM THE SHIFT OF THE X-RAY BRAGG ANGLE: APPLICATION TO CUBIC BaxSr1-xTiO3 FILMS
Authors:   Computer Research Center, National Polytechnic Institute (CIC-IPN), Juan de Dios Bátiz Avenue, Esq. Miguel Othón de Mendizábal, Col. Nuevo Vallejo Industrial, Gustavo A. Madero, Z.P. 07738 México City, Mexico, AGUILAR CRUZ K. A. , MEDEL JUÁREZ J. J. ,   Computer Research Center, National Polytechnic Institute (CIC-IPN), Juan de Dios Bátiz Avenue, Esq. Miguel Othón de Mendizábal, Col. Nuevo Vallejo Industrial, Gustavo A. Madero, Z.P. 07738 México City, Mexico, ZAGACETA ÁLVAREZ M. T. ,   Higher School of Mechanical and Electrical Engineering (ESIME-IPN-AZ), Azcapotzalco Unit, National Polytechnic Institute, Av. Granjas, Mexico City, Z.P. 02250, Mexico, PALMA OROZCO R. ,   School of Computing, National Polytechnic Institute (ESCOM-IPN), Av. Juan de Dios Bátiz Avenue, Corner Miguel Othón de Mendizábal, Col. Lindavista, Gustavo A. Madero, Z.P. 07738 Mexico City, Mexico, CABALLERO-BRIONES F. ,   National Polytechnic Institute, Materials and Technologies for Energy, Health and Environment (GESMAT), CICATA-IPN Altamira Unit; Km 14.5 Carretera Tampico-Puerto Industrial Altamira, Z.P. 89600 Altamira, Tamaulipas Mexico, FERNÁNDEZ-MUÑOZ J. L. ,   National Polytechnic Institute, Materials and Technologies for Energy, Health and Environment (GESMAT), CICATA-IPN Legaria Unit, Legaria 694 Avenue, Col Irrigación, Z.P. 11500 Mexico City, Mexico
Published: February 2023

Pseudobinary alloys of the type AxB1-xC are expected to obey the Vegard’s law that states a linear relationship between the chemical parameter x and the lattice parameter. However, in many cases, deviations from the Vegard’s are found, and the calculation of x requires compositional characterization, often complicated in the presence of secondary phases of the same material. In the present work, 𝐵𝑎𝑥𝑆𝑟(1−𝑥)𝑇𝑖𝑂3 (BSTO) films were deposited by RF co-sputtering from 𝐵𝑎𝑇𝑖𝑂3 and 𝑆𝑟𝑇𝑖𝑂3 targets to obtain differently 𝐵𝑎⁄𝑆𝑟 ratios considering the different RF-power applied to each target. We describe a mathematical model based on the Boltzmann equation to calculate the 𝑥 parameter of the cubic phase of the BSTO films in the 0 ≤ 𝑥 ≤ 1 range. That was made by following the 2𝜃 diffraction angular shift of the plane (111) upon the increase of substitutional Ba2+ in the pseudobinary alloy, as a function of the RF applied power and fitting the interplanar distances and lattice parameter in the alloys were calculated onto the fitted sigmoid trajectory. The model showed the region where the lattice parameter a vs x obeys the Vegard’s law and correctly fitted “a” in the entire 0<x<1 range. The model can be applicable to other pseudobinary systems with deviations from the Vegard’s law, from a simple X-ray diffraction analysis, providing fast chemical information, complementary with further compositional characterization.
DETECTION OF HAZARDOUS SO2 BY MWCNTS-BASED GAS SENSORS A NEW APPLICATION FOR MONITORING IN MUSEUMS
Authors:   Faculty of Archaeology and Tourism, the University of Jordan, Amman, 11942, Jordan, ALTAL Y. S. , SEKHANEH W. ,   Faculty of Archeology and Anthropology, Department of Conservation and Management of Cultural Resources, Yarmouk University, Irbid 2111-63, Jordan
Published: February 2023

This study aims to investigate advance material and develops a technique that detects the smallest traces of hazard gases for the instantaneous rate of atmospheric corrosion of archaeological materials indoor and outdoor. This article describes the advance and use of multiple-walled carbon nanotubes (MWCNT) with carbon nanoparticles and spheres as a network to investigate it as resistive gas nanosensors for SO2 detection. The responses of the sensors based on the MWCNs in various concentration to SO2 responses, in SO2 ambient air, performed by resistance measurements from room temperatures of 25 °C to 250 °C, more than 400 °C the structure will. SO2 gas concentration from 0.5 to 20 ppm to find new application, particularly application in Museums to conserve cultural heritage materials from deterioration caused by hazard gases.
The morphological study of FePO4/plasma treated bamboo charcoal composite act as cathode material in energy storage devices
Authors:   Research Department of Physics, Sri Vasavi College Erode, Tamilnadu, India, Saveetha S. , Vijayalakshmi K. A. ,   Research Department of Physics, Sri Vasavi College Erode, Tamilnadu, India
Published: February 2023

The capacity of energy storage devices to be based on the cathode material with best morphology. The FePO4 nanoparticles were synthesized by hydrothermal method and Bamboo charcoal (BCC) was synthesized and activated by pyrolysis method. The cold Plasma was used to magnify the surface behaviour of activated Bamboo Charcoal. The hybrid composite of FePO4/Plasma exposed BCC and pure FePO4 nano materials morphological and structural properties were analysed through XRD, FTIR and SEM characterization studies. This research reveals that the Plasma exposed BCC nanoparticles were well incorporate with FePO4 nanoparticles and delivered embedded FePO4 nanoparticles. The result shows that the FePO4/plasma exposed BCC particle size was decreased when compare to pure FePO4, which in turn increase the energy storage capacity of the material.
Shape- and area-controlled growth of Cu particles during electrodeposition
Authors:   Institute of Technological Sciences, Wuhan University, Wuhan 430072, China, Yang B. S , Ai Y. ,   School of Mechanical Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, China, Zhan X. Z. ,   School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China, Liu X. W. ,   Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
Published: February 2023

Shape-controlled growth (leaf-like, dendritic, flower-like, multi-corner and multi-edge) and area-controlled growth (Island- and linear-) of Cu particles during a simple electrodeposition were reported. Defects and types of substrates play a major role in the preparation process, furthermore temperature and ultrasonic vibration of electrolyte. The series of well-shaped Cu particles were fabricated through changing substrates (iron, graphite or copper sheets) and electrolyte temperature (50℃, 70℃ and 80℃), or introducing ultrasonic vibration, endowing Cu materials with intriguing properties such as an increased surface area and active site for SERS. By introducing two kinds of linear-defects (20~40 μm and 5 μm width) on the substrate, the selective electrodeposition phenomena appeared: island-controlled growth and linear-controlled growth.
Analysis of flat glass deposited thin film made from aluminium doped zinc oxide (AZO)
Authors:   Department of Mathematics and Physics, Faculty of Applied Sciences, Cape Peninsula University of Technology, Cape Town, South Africa, Osayemwenre G. , Inambao F. ,   Department of Mechanical Engineering, Faculty of Engineering, University of KwaZulu-Natal, Durban, South Africa, Osibote O. A. ,   Department of Mathematics and Physics, Faculty of Applied Sciences, Cape Peninsula University of Technology, Cape Town, South Africa
Published: February 2023

Doped aluminium zinc oxide (Al doped ZnO/AZO) thin films that were synthesised on glass and nanostructured with cadmium substrates were allowed to degrade over a period of two years in a controlled environment. The films were placed in airtight containers for eighteen months and later placed in plastic containers for four months at room temperature. This environment was able to allow slight damping at times to accelerate the physical degradation process. The evolution of transparent conductive oxide (TCO) like aluminium doped zinc oxide (AZO) has been a welcome development in solar cell production. But it quickly deteriorates which is a drawback in its application. In this study, each film was doped with the same Al concentration but in different mediums such as cadmium, nitrogen, silver and argon (Cd, N2, Ag, Ar). To investigate the optical performance, the transmittance of each film was studied. An average transmittance of above 65 % was observed. The optical properties in these films were varied by the different mediums which are cadmium, nitrogen, silver and argon (Cd, N2, Ag, Ar). It was observed that the transmission over the visible range varied as the wavelength increased. This change happens because of free carriers coupling to the electric field leading to high reflection. Therefore, the simplest way to quantify the degree of degradation was to investigate the optical properties such as the transmission between layers. The micro-structure of these thin films were evaluated using scanning probe microscopy (SPM) to demonstrate degradation. Finally, the morphological and elemental compositions were analysed with scanning electron microscopy (SEM) and energydispersive X-ray spectroscopy (EDX).
Pulse generation of mode-locking fiber laser at 1.053 µM using graphene oxide film as saturable absorber
Authors:   Faculty of Engineering, Universiti Malaysia Sabah (UMS), Jalan UMS, 88400 Kota_Kinabalu, Haris H. , Muhammad A. R. ,   Institute_=of_=Microengineering+=and.=Nanoelectronics+(IMEN),Universiti Kebangsaan=Malaysia=(UKM),=Bangi,=43600,=Selangor,=Malaysia, Tan S. J. ,   UOW Malaysia KDU University College, Utropolis Glenmarie, 40150 Shah Alam, Selangor, Malaysia, Harun S. W. ,   Department of Electrical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia, Saad I. ,   Faculty of Engineering, Universiti Malaysia Sabah (UMS), Jalan UMS, 88400 Kota_Kinabalu
Published: February 2023

This article depicts a reliable mode-locking Ytterbium-doped fibre laser (YDFL) utilizing a saturable absorber (SA) film which was created by combining graphene oxide (GO) and polyethylene oxide (PEO) solutions. A thin film was eventually formed from the polymer composite after it was dried at room temperature. The thin film is then integrated into the YDFL cavity to initiate mode-locking process. Pulse with repetition rate of 6 MHz is observed from oscilloscope. The estimated cavity length of YDFL is calculated at approximately 25 m a total net dispersion of -20.397 ps2 /km. This proves that our selffabricated SA is successful and is proven as an effective SA.
Green synthesis, characterization and biological activity of silver nanoparticles from Dicranum majus Turner
Authors:   Department of Medical Biology, Faculty of Medicine, Canakkale Onsekiz Mart University, Canakkale, 17100, Turkey, Tonguc Yayintas O. , Demir N. ,   Department of Biology, Faculty of Science and Arts, Canakkale Onsekiz Mart University, Canakkale, 17100, Turkey, Yilmaz S. ,   Department of Chemistry, Faculty of Science and Arts, Canakkale Onsekiz Mart University, Canakkale, 17100, Turkey, Cicekliyurt M. M. ,   Department of Medical Biology, Faculty of Medicine, Canakkale Onsekiz Mart University, Canakkale, 17100, Turkey
Published: February 2023

The exploitation of various plant compounds for the biosynthesis of nanoparticles is considered a green technology because it does not involve any harmful chemicals. In the current study, we synthesized and characterized silver nanoparticles from Dicranum majus (Dm) Turner, a moss plant (Bryophyte). The occurrence of the visible color change from red to brown confirmed Dm silver nanoparticles (DmAgNPs). The DmAgNPs were characterized based on Ultraviolet-Visible (UV-Vis) Spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR). The morphology, size, and elemental analysis of the prepared silver nanoparticles were examined using Transmission Electron Microscope (TEM) and zeta potential (ZP). The distribution pattern of DmAgNPs particle size and stability were determined with the zeta potential analysis by zeta sizer. The maximum absorption of DmAgNPs was obtained at 422 nm by UV-Vis spectrometer. The presence of carbonyl compounds was demonstrated by FTIR, TEM. Zeta sizer analysis revealed the average size of the nanoparticles as 278.7 nm with -16.7 mV zeta potential demonstrates moderate stability. Considering its antibacterial activities, DmAgNP is more effective on Enterococcus faecalis (ATCC 29212), Listeria monocytogenes (ATCC 7644), and Proteus vulgaris (NRRL B-123) bacteria; it has no mutagenic activity; cleaved DNA as a result of gel electrophoresis; Antioxidant activity was determined by the 2,2-Diphenyl-1- picrylhydrazyl (DPPH) method.
A dual-band miniature uniplanar antenna on epoxy reinforced woven glass material for WiMAX, WLAN, UWB, and X-band applications
Authors:   Department of Electrical and Computer Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia, Alam Md. M. , Azim R. ,   Department of Physics, University of Chittagong, Chattogram 4331, Bangladesh, Sobahi N. M. ,   Department of Electrical and Computer Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia, Khan A. I. ,   Computer Science Department, King Abdulaziz University, Jeddah 21589, Saudi Arabia
Published: February 2023

In this paper, a dual-band miniature uniplanar antenna is presented. The antenna size is 24.5 mm × 20 mm × 1.6 mm which consists of a modified bow-tie-shaped radiator, an inverted L-shaped ground plane, and an extended inverted U-shaped ground plane, and designed on the single side of a low-cost epoxy matrix reinforced woven glass material with permittivity 4.6. The numerical results confirm that the radiator is effectively coupled with the coplanar ground planes and the investigated antenna can cover dual frequency bands ranging from 3.32 to 10.9 GHz, and 11.88 to 17.77 GHz. The measured results of the prototype in frequency-domain and time-domain are obtained and compared with the simulated results. The results indicate that the proposed antenna demonstrates good performance over the dual impedance bands, which makes it a very potential candidate for WiMAX, WLAN, UWB, X-band, and Ku-band wireless communication applications.
Preparation and determination of the physical and chemical properties of the nano-gel film of bacterial cellulose
Authors:   Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan, Rakhimova B. U. , Kudaibergenov K. K. ,   Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan, Tulepov M. I. ,   Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan, Sassykova L. R. ,   Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan, Spanova G. A. ,   Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan, Mansurov Z. A. ,   Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan, Savitskaya I.  S. ,   Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan
Published: February 2023

Currently, updated compounds of natural origin are becoming more and more popular as an alternative to synthetic materials. In this work, the physicochemical properties of the nanogel film of bacterial cellulose obtained by culturing the symbiosis of acetic acid bacteria Gluconacetobacter xylinus C-3 and the Hestrin-Schramm culture medium were investigated. The sorption properties in relation to goose fat were determined. It was found that the process of desorption of goose fat from the obtained nanogel film of bacterial cellulose into the buffer solution is completed after 24 hours, which indicates the optimal desorption rate for applications with prolonged action, namely, anti-burn action. The pH value of human skin changes from slightly acidic to neutral, and this confirms the possibility of manufacturing transdermal therapeutic systems based on nanogel film of bacterial cellulose impregnated with oil solutions of drugs. Thus, the prospects of using nanogel films of bacterial cellulose for creating transdermal therapeutic systems are evaluated.
Synthesis and characterization of ultra-fine titania powders for wastewater treatment
Authors:   Mineral Processing Research Centre, Pakistan Council of Scientific and Industrial Research, Ferozepur Road, Lahore, Pakistan, Zahra S. , Deeba F. ,   Centre for Enviromental Protection, Pakistan Council of Scientific and Industrial Research, Ferozepur Road, Lahore, Pakistan, Irshad M. ,   Department of Chemistry, DSNT, University of Education, College Road, Township, Lahore, Pakistan, Sheikh A. ,   Mineral Processing Research Centre, Pakistan Council of Scientific and Industrial Research, Ferozepur Road, Lahore, Pakistan, Zahra S. ,   Department of Physics, DSNT, University of Education, College Road, Township, Lahore, Pakistan, Khan A. M. ,   Department of Chemistry, DSNT, University of Education, College Road, Township, Lahore, Pakistan
Published: February 2023

Ultra-fine titania powders were synthesized through sol-gel method. A surfactant-free nonaqueous approach was followed as a quite suitable alternative to surfactants using titanium tetrachloride and 2-ethyl hexanol as precursors. The prepared samples were calcined at different temperatures ranging from 500 ºC to 800 ºC. The crystal structure and thermal stability of metal oxide particles were studied using X-ray diffraction technique (XRD) and differential scanning calorimetry (DSC-TGA) respectively. The purity of powders was checked by infrared spectroscopy (IR) whereas the surface morphology was studied by field emission scanning electron microscopy (FESEM). The prepared titania samples were employed for the reduction of cyanide, BOD, COD, TDS, color and pH of industrial wastewater.
Nursing and health
Authors: Leitão Cardoso Maria Vera Lúcia Moreira
Published: February 2023

Human population suffers from the omissions in the field of assistance, at various levels of health care, despite the current political, social and technological advances, whether global or national. Therefore, we believe that the speech of those who occupy places that allow raising the representative voice of the professionals who form the health team, need greater strength so that transformations happen in practice.
Absenteismo dos trabalhadores de enfermagem em um hospital universitário do Estado de Pernambuco
Authors: Ferreira Edeilson Vicente , Mesquita de Amorim Maria José Dantas , Lemos Renata Maria Cavalcanti , Ferreira Nadja da Silva , Silva Flávio de Oliveira , Laureano Filho José Rodrigues
Published: February 2023

O absenteísmo na enfermagem é um problema muito preocupante, pois interfere no cuidado ao cliente, sobrecarrega os demais integrantes da equipe podendo levar ao adoecimento. Objetivou-se identificar e analisar as causas de absenteísmo dos trabalhadores de enfermagem do serviço de internação através de auditoria em fichas de afastamentos não programados. Estudo descritivo, exploratório com abordagem quantitativa realizado no Serviço de Enfermagem em dezembro de 2010. A amostra foi composta pelas fichas cadastrais dos meses de janeiro a dezembro de 2009. Foram analisados dados referentes ao sexo e causas mais comuns de absenteísmo. Constatou-se a predominância do absenteísmo no sexo feminino (72,86%), sendo os motivos mais freqüentes das licenças médicas, os relacionados ao sistema osteomuscular (20,63%). Concluiu-se ser necessária a adoção de programas e ações preventivas que visem melhorias nas condições de trabalho, favorecendo uma melhor qualidade de vida aos profissionais de saúde e uma assistência de enfermagem digna aos usuários.
A integralidade da assistência no contexto da atenção pré-natal
Authors: Melo Raimunda Maria de , Brito Rosineide Santana de , de Carvalho Francisca Patrícia Barreto , Júnior João Mário Pessoa , Lopes Barros Sâmara Dalliana de Oliveira
Published: February 2023

O estudo objetivou identificar o entendimento de enfermeiras acerca da integralidade das ações em saúde no pré-natal. Trata-se de uma pesquisa descritiva e exploratória de natureza qualitativa, realizada em uma unidade de saúde de um município do Rio Grande do Norte, Brasil. A coleta de dados ocorreu mediante entrevista semiestruturada, junto a três enfermeiras. O projeto foi aprovado pelo Comitê de Ética e Pesquisa da Faculdade de Enfermagem e Medicina Nova Esperança, protocolo nº 02/2009. Os depoimentos foram tratados conforme o método de análise de conteúdo segundo Bardin e discutidos mediante achados literários sobre a integralidade da assistência. Para as entrevistadas a integralidade encerra ações voltadas à resolução de problemas da gestante a partir da sua realidade e reconheceram haver obstáculos para operacionalizar esse princípio no pré-natal. Entretanto, na atenção obstétrica, no entendimento das pesquisadas, a integralidade configura-se no fortalecimento dos vínculos entre aqueles que prestam e recebem o cuidado.
Caracteristicas clínicas de crianças em uso de derivações ventriculares para tratamento da hidrocefalia
Authors: de Alcântara Maria Cláudia Moreira , Araújo da Silva Francisca Alexandra , Castro Maria Euridéa de , Moreira Thereza Maria Magalhães
Published: February 2023

Estudo descritivo, quantitativo que teve como objetivo identificar as características clínicas de crianças em uso de derivações ventriculares para tratamento da hidrocefalia. Deu-se em uma unidade de internação em neurocirurgia pediátrica de um hospital público. Amostra constituída por 60 pacientes internados de junho a dezembro de 2006. Os resultados evidenciaram idade variando de 1 dia a 13 anos, sem diferença entre os sexos, 58,3% dos pacientes internados estavam na faixa etária menor que um ano de idade, com diagnóstico principal de hidrocefalia. A principal causa de internações subsequentes está relacionada à disfunção da derivação ventricular peritoneal. As crianças evoluíram para alta hospitalar com tempo de internação de 3 a 240 dias. As derivações ventriculares são métodos importantes para aumentar a sobrevida das crianças com hidrocefalia. Porém os cuidados dispensados quanto ao manuseio dos dispositivos devem ser bem orientados pela equipe multiprofissional às famílias, objetivando reduzir os longos períodos de reinternações.
A vivência do ser enfermeiro e preceptor em um hospital escola: olhar fenomenológico
Authors: Nogueira Tavares Pâmela Elaine , Maximiano dos Santos Sidney Augusto , Comassetto Isabel , Santos Regina Maria dos , da Silva Santana Viviane Vanessa Rodrigues
Published: February 2023

Este estudo teve como objetivo compreender a experiência do fenômeno vivenciado pelos enfermeiros preceptores de graduandos do último ano em Enfermagem. O referencial metodológico utilizado foi a fenomenologia e os sujeitos, quinze enfermeiros preceptores do Hospital Universitário Professor Alberto Antunes, em Maceió, Alagoas. As entrevistas foram realizadas nos meses de agosto e setembro de 2010, com a seguinte questão norteadora: Como é para você vivenciar o papel de enfermeiro preceptor de graduandos em Enfermagem no Hospital Universitário Professor Alberto Antunes? Foram reveladas cinco categorias: Satisfação em receber graduandos; Estímulo à atualização; Sobrecarga de Trabalho; Apoio da academia aos enfermeiros e Características do graduando x Sucesso do estágio. Com o desvelar do fenômeno, foi possível obter subsídios para colaborar com as academias formadoras com um suporte teórico para possível reestruturação do planejamento do estágio curricular obrigatório na área hospitalar.