bluuebunny/crossref_metadata_2025 huggingface dataset:
Имена с суффиксом *-ka в парачи и ормури
Authors:   Лаборатория востоковедения и компаративистики, ШАГИ РАНХиГС, Трофимов А. А.
Published: December 2022

Статья посвящена ударению именных основ с суффиксом *-ka в малых иранских языках парачи и ормури в сравнении с ударением в именных основах афганского пушту, сохранившим следы праиранского и праиндоевропейского ударения. В работе рассмотрены этимологические соответствия *-ka-основ в пушту основам в парачи и ормури и был проведен сравнительный анализ полученных данных. Для обоих типов производных *-ka-основ было установлено всего порядка десяти надежных соответствий, что обусловлено недостаточной документацией данных парачи и ормури; тем не менее, наиболее убедительные примеры показывают, что в парачи и ормури акцентуация имен на *-(a)ka также подчиняется правилу «контрастного ударения», наблюдаемому в пушту и ведийском. Наиболее убедительные примеры, хотя и сравнительно малочисленные, находят достоверные этимологические параллели в пушту. The article is devoted to the stress of nominal stems on the suffix *-ka in Parachi and Ormuri, two minor Iranian languages, in comparison with Pashto stems preserving traces of Proto-Iranian and Proto-Indo-European stress. The Parachi and Ormuri etymological correspondences to *-ka-stems in Pashto are examined in this study and comparative analysis of the data is provided. Both types of *-ka stem derivatives consist of approximately ten reliable correspondences due to insufficient documentation of Parachi and Ormuri. The most compelling examples demonstrate that the accentuation of Parachi and Ormuri nouns in *-(a)ka is equally characterized by «stress by contrast», as is the case in the accentuation of Pashto and Vedic nouns. The most convincing examples, though relatively few, have reliable etymological cognates in the Pashto language.
A glimpse at fifty-one years in acoustic emission
Authors:   University of Denver, Hamstad Marvin
Published: December 2022

After 51 years continuously involved in acoustic emission (AE) testing and research, it has been interesting to look back over five decades. The equipment available in the early 1970s was primitive compared to now. At the start of that decade, only one, recently established, commercial company sold AE measurement equipment, and other useful equipment was internally built or adapted from other technologies. Further, the data that came from an AE monitored test was simply the number (counts) of penetrations of a fixed one-volt threshold expressed as an increasing total or a rate and recorded on an x-y plotter. The purpose of this “glimpse” is to present advances both within the author’s research as well as those that were adopted from others research that were viewed as moving AE technology forward. This “glimpse” is not intended to be comprehensive, instead it is limited to aspects the author was involved in. Among the topics to be covered are advances such as understanding hydraulic test machine continuous noise, true rootmean-square (RMS) voltage measurements, inclusion particle fracture or decohesion, tension versus compression testing for unflawed metal samples, the pencil lead break, an acoustic emission signal simulator, broadband sensors, digital waveform recorders, large transversedimensioned plates, absolutely calibrated flat-with-frequency AE sensors, finite element modeling (FEM) in isotropic materials, validation of FEM, computer-based digital AE systems, intensity of frequency versus time of AE signals, superposition of group velocity results and FEM beyond the case of dipoles in an isotropic plate.
Acoustic emission for identification of the dominant stress component in polymer composites at early loads
Authors:   Vrije Universiteit Brussel (VUB), Kalteremidou Kalliopi-Artemi ,   Vrije Universiteit Brussel (VUB), Aggelis Dimitrios G. ,   Vrije Universiteit Brussel (VUB), Van Hemelrijck Danny ,   Vrije Universiteit Brussel (VUB), Pyl Lincy
Published: December 2022

Carbon Fiber Reinforced Polymer (CFRP) composites are broadly used in engineering applications. Their inherent anisotropy due to different fiber orientations can be considered an advantage since the strength of the component can be designated in preferential loading directions. However, this anisotropy leads to multiaxial stress conditions, complicating their damage sequence and mechanical response. Identification of these multiaxial conditions at early loading stages is of paramount importance to predict the upcoming structural response of the material. Acoustic Emission (AE) is applied in this study to CFRP laminates with different stacking sequences, in which different multiaxial conditions are generated. Laminates consisting of 30o plies are characterized by dominant shear stresses, whereas in laminates with 60o layers transverse normal stresses govern the stress state. Through quasi-static and incremental loading, it is shown that certain AE features can be used to identify the dominant stress component rather than just the occurring damage mode even at early loads, before severe fracture influences the mechanical capacity. This is of great importance in cases that detrimental shear stresses are generated, leading to delaminations and mechanical deterioration. AE can be used in this direction to predict the upcoming damage and to take necessary measures to avoid final failure.
Long term coupling of AE sensors in high temperature environment
Authors:   University of Stuttgart, Juengert Anne ,   University of Stuttgart, Friedrich Maximilian ,   University of Stuttgart, Klenk Andreas
Published: December 2022

Acoustic emission monitoring took place in a long-term test in a coal fired power plant in Germany for 4 years. The test object was a steel pipe with a ceramic matrix composite (CMC) jacket, which was installed in a bypass of a live steam line. The peak operating temperature was approx. 530 °C. The aim of the AE monitoring was to investigate damage evolution in the CMC jacket. The test pipe was removed from the power plant in 2021. Due to several reasons, the jacket did not experience high loads during operation and therefore information about damage mechanisms in the AE data is rare. However, a lot could be learned from this project concerning long term stability of the equipment in rough environment, data storage and filtering and about sensor long term coupling of AE sensors at high temperatures. The high temperature AE sensors were applied directly onto the surface of the steel pipe and the CMC jacket using a ceramic glue. Additionally, the sensors were held by stainless steel bands which were acoustically decoupled by mineral wool. The application of the sensors took place at a temperature of about 30 °C. It was not possible to check on the quality of the coupling during operation as the whole pipe was covered by insulation, including all sensors. Also, the sensors did not allow pulsing as test for the coupling quality. Effects like thermal expansion of sensors, CMC jacket and ceramic glue had to be considered. Additionally, the power plant adepts its electrical output to the demands by flexible operation. This leads to cyclic changes in temperature and a high amount of heating and cooling cycles, which affects the coupling condition of the AE sensors. During dismantling of the test pipe from the power plant, a visual inspection of the sensor coupling was possible. The condition of the sensor coupling was documented before and after the sensors were removed. Pencil lead breaks were performed to quantify the quality of coupling as well. It could be shown that long term coupling of AE sensors is possible even in high temperature environment combined with cyclic temperature changes.
Effective approaches to remote asset monitoring with acoustic emission
Authors:   MISTRAS Products & Systems, Nunez Arturo ,   Mistras Group Hellas, Kattis Spilios
Published: December 2022

This paper presents the effectiveness of remote asset monitoring using acoustic emission. We will discuss different aspects of implementing an effective remote asset monitoring operation, such as considerations for the deployment of instrumentation in the field, instrumentation, communications, benefits of automatic data transfer from the monitoring system to a secure server, continuous automatic verification of hardware integrity, and automatic notification of potential damage or conditions affecting the asset integrity occurring. We will provide an in-depth view of the cloud monitoring implementation processes, and the use of machine learning and other data analytics techniques to identify abnormal acoustic emission data patterns. The application of these tools to specific case studies in electric power transformers, power steam generators and civil infrastructure assets will be presented. Finally, we will illustrate how these capabilities help to provide timely, actionable information to the asset owner.
Acoustic emission applied to mode I fatigue damage monitoring of adhesively bonded joints
Authors:   Politecnico di Milano, Lima Rosemere de Araujo Alves ,   Politecnico di Milano, Bernasconi Andrea ,   Politecnico di Milano, Carboni Michele
Published: December 2022

The use of adhesively bonded joints has increased considerably due to their lightweight, relevant strength-weight ratio and possibility to join multi-materials. Nevertheless, there are still some challenges in the application of this kind of joints in primary structures, such as guaranteeing their reliability during the components’ useful life. Structural health monitoring methods are suggested to ensure in-service safety and reliability of adhesive joints. The acoustic emission appears promising because it can detect the elastic waves produced within the material when it is under damage or straining. This research focuses on mode I fatigue damage monitoring metallic double cantilever beam adhesively bonded joints using the acoustic emission method. Digital image correlation and visual evaluation were applied during fatigue interruptions to track the crack-tip position within the adhesive and correlate them with the acoustic emission outcomes. The acoustic emission method is susceptible and different kinds of waves (background, friction and damage) can be easily assessed during the tests, producing an immense amount of data. So, unsupervised artificial neural networks for patterning recognition were proposed. Self-organising maps and k-means algorithms were used for data clustering and then classified regarding their sources. Finally, the acoustic emission results, digital image correlation and visual evaluations were compared.
Acoustic emission activation protocols for alkali-silica reaction damage assessment in concrete
Authors:   Catholic University of Leuven (KU Leuven), Van Steen Charlotte ,   Catholic University of Leuven (KU Leuven), Verstrynge Els
Published: December 2022

As existing concrete structures age, several degradation phenomena can endanger their structural safety. A severe threat to the integrity of concrete is posed by the alkali-silica reaction, which starts internally by the formation and swelling of a hydrophilic gel and eventually leads to concrete cracking. The acoustic emission technique can be applied to monitor ongoing damage caused by degradation processes. However, due to the working principle of the technique, only active damage can be detected. This paper investigates damage activation protocols to assess already existing damage in a limited timeframe. Small concrete samples that were deteriorated up to a target damage level in an accelerated way are investigated. Several activation protocols such as changing the moisture content, applying temperature fluctuations, and heating the samples with a heat lamp are applied and analyzed. It is found that changing the moisture content is most promising in terms of AE activation, its ability to distinguish damaged and undamaged samples, and allow damage localization.
Online monitoring of manufacturing processes by acoustic emission
Authors:   French Industrial and Mechanical Technical Centre (CETIM), Saidoun Abdelkrim ,   French Industrial and Mechanical Technical Centre (CETIM), Vu Quang Ahn ,   French Industrial and Mechanical Technical Centre (CETIM), Zhang Fan
Published: December 2022

For many years, Cetim has been working on on-line control methodologies for manufacturing processes in order to reduce or even eliminate controls on finished parts. After the first works by conducted by the Acoustic Emission technique (AE) on the monitoring of sheet metal stamping process [1], the monitoring of new manufacturing processes such as metal cutting, wire drawing, spot welding, forging and especially are under study. In the present paper, the results of acoustic emission monitoring carried out on additive manufacturing production and also wire drawing are presented. For both processes on-line control during manufacturing is particularly important. Due to the geometric complexity of the parts produced by additive manufacturing, suitable nondestructive testing (NDT) means are limited. In addition, these are generally small series or even single parts with a long manufacturing time. For their part, wire drawing manufacturers currently have only visual inspection, unable to detect fine scratches on the wire at the output of production.
Use of acoustic emission to monitor adipic acid crystallization
Authors:   University of Lyon, De Souza Lima Roger ,   University of Lyon, Cameirao Ana ,   University of Lyon, Serris Eric
Published: December 2022

Crystallization is regarded as an important unit operation for separation and purification. However, it is still difficult to control or to optimize the crystallization process due to the complexity of the coupled phenomena taking place simultaneously in the liquid and solid phases. In order to overcome such drawbacks, different analytical technologies have been implemented in the literature for monitoring the key crystallization parameters. In our work, a multi-probe monitoring system composed of acoustic emission, spectroscopic and imaging probes was applied to the crystallization of a model system (an aqueous solution of adipic acid). The crystallization was carried out under vacuum or atmospheric pressures. The goal was to demonstrate the usefulness of the multi-probe system for monitoring the crystallization process, with special attention to the information given by the acoustic emission, in terms of absolute energy, and the spectroscopic probes. Firstly, the influence of the crystal load on the absolute energy is demonstrated. Then, it is shown how the absolute energy can capture the modifications in the crystallization dynamics due to the different experimental conditions. Such dynamics can also be observed from other acoustic emission descriptors.
Investigation of delta-t mapping source location technique based on the arrival of A0 modes
Authors:   Brunel University London, Yang Han ,   Brunel University London, Wang Bin ,   Brunel University London, Liu Dandan ,   TWI Ltd (The Welding Institute), Grigg Stephen
Published: December 2022

The main assumptions made for traditional Time of Arrival (TOA) source location techniques are constant wave speed and straight wave path between the acoustic emission (AE) source and the sensors. However, because of material inhomogeneity and structural complexity, wave velocities may vary in different directions and a direct wave path may be very difficult to be achieved. Therefore, to solve these problems, researchers developed delta-T mapping source location technique, which has been shown to have good accuracy for source location in aerospace structure because complex geometric features are considered when training the mapping data and accurate wave speed data are not required. However, this technique relies on identifying the arrival time of S0 (extensional) Lamb mode, which may not be distinguished from background noise due to lowamplitude AE sources such as corrosion or large source-to-sensor distance. As shown in Figure 1, source location accuracy in a corrosion test on a simple plate was greatly improved after the velocity of A0 (flexural) Lamb mode was used in the source location algorithm. Therefore, identifying the arrival time of A0 modes and hence building delta-T maps are more feasible to solve the problem. Experiments have been carried out with an artificial AE source on a thin complex steel plate. A threshold crossing method based on wavelet coefficient was used to estimate the arrival time of A0 modes. The average error (3.9 mm) of the source locations predicted by delta-T mapping based on A0 arrival was larger than that (1.8 mm) of S0 arrival, which can be explained by the difficulties in accurately identifying the arrival of A0 modes.
A new iso standard for AE sensor sensitivity determination uses the face-to-face stimulation method
Authors:   Vallen-Systeme GmbH, Vallen Hartmut
Published: December 2022

This paper summarizes a Final Draft International Standard (FDIS) developed by ISO TC 135 SC 9 WG 9. Since the draft comprises 60 pages, only an overview can be presented in this compressed format.
Crack mode analysis of cement mortars with signal - based acoustic emission techniques
Authors:   Catholic University of Leuven (KU Leuven), Deresse Nuhamin E. ,   Catholic University of Leuven (KU Leuven), Van Steen Charlotte ,   Catholic University of Leuven (KU Leuven), Sarem Mina ,   Catholic University of Leuven (KU Leuven), François Stijn ,   Catholic University of Leuven (KU Leuven), Verstrynge Els
Published: December 2022

Determining the crack mode in structures made of brittle materials, such as concrete and masonry, is important for structural analysis and failure prediction. Fractures monitored with the acoustic emission technique (AE) are commonly classified into different modes using Rise angle (RA) – Average Frequency (AF) analysis, the simplified Green's functions for moment tensor analysis (SiGMA), and frequency spectrum analysis. However, the classification limits are dependent on the material, the test setup, and the monitoring condition. Hence, this study defines these limits by comparing the three AE-based fracture mode analysis methods on AE data collected from three test types on mortar specimens. In a direct tensile test, the peak frequencies of most of the AE events were higher ( >60 kHz). While almost all of the AE events in a friction test had significantly lower peak frequency (
On the effect of coatings and pre-corrosion during fatigue tests of 7075-T6 aluminum alloy monitored with acoustic emission (AE)
Authors:   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Vié Théophile ,   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Godin Nathalie ,   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Deschanel Stéphanie ,   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Normand B
Published: December 2022

Strength hardened aluminum alloys as 7075-T6 al are widely used in aeronautical industry due to their low density and high mechanical properties. Their specific microstructural composition makes them sensitive to corrosion damage at intermetallic particles. Aeronautical parts are often submitted to corrosive environments and fatigue loadings. For safety and economic matters, it is important to be able to monitor the development of damages during application. In this context, Acoustic Emission (AE) is a useful tool to monitor the state of material damage and predict its remaining useful lifetime. This work, which is part of a larger European project (Early detection and progress monitoring and prediction of corrosion in aeronautic Al alloys through calibrated Ultrasonic-CorROSion Sensor application), has for main objective to understand, identify and quantify, via AE, how corrosion defects impact the fatigue behaviour of aluminum alloy 7075-T6 specimens and covered with different types of coatings (top coat, primer and a conversion coating obtained by anodizing process). Therefore, tensile-tensile fatigue tests (R? = 0.1) monitored with AE are performed at room temperature on non-corroded samples and on corroded samples. Precorrosion defects are generated by the complete immersion of the samples in an NaCl bath (3.5% wt). Pre-corrosion defects tend to decrease the fatigue lifetime of the material tested and create damage in the substrate and coatings generating new AE sources. For all types of coated specimens, damage indicators based on the AE activity are studied in order to find characteristic damage times giving information on the remaining useful lifetime of the material during fatigue tests. Characteristic times linked to damage initiation in the substrate and propagation the main fatigue crack in the material are defined.
Development of novel acoustic emission source location method utilizing wavelet transform and akaike information criterion
Authors:   Meiji University, Suzuki Yoshito ,   Meiji University, Takuma Matsuo
Published: December 2022

The acoustic emission (AE) method enables real-time monitoring of damage initiation and progression. Recently, AE analysis using machine learning has become widely popular; however, the AE source location is often located manually to ensure reliability and accuracy. It is desirable to ensure the AE source location is fully automated with high accuracy when used for machine learning and other applications, or in a situation that generates huge amounts of AE signals. This study proposes a novel AE source location method that can accurately and automatically locate AE sources. First, a wavelet transform was applied to an AE signal to extract the wavelet coefficient of a specific frequency. Then, the Akaike information criterion is applied to the time transient of wavelet coefficient to identify the initial wave arrival time. The localized AE source accuracy of the method is compared with a conventional method. The result of the verification, comparing source location error is nearly same with manual initial detection and the developed method. In addition, about 30 times faster than the conventional visual method. Thus, the developed method is an excellent AE source location method in terms of both accuracy and speed of analysis.
Acoustic emission classification by cross-correlation
Authors:   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Selle Théotime de la ,   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Deschanel Stéphanie ,   University of Grenoble (UJF)-Alpes, Weiss Jérome
Published: December 2022

Acoustic emission signals specific to the incremental advance of fatigue cracks can be detected, cycle after cycle, during crack propagation tests. They were termed acoustic multiplets in reference to repeating earthquakes. Detecting such multiplets would give information about the fracturing process and provide early warnings when monitoring industrial parts in service. We developed a clustering method to extract multiplets signals from all signals and noise of fatigue tests. This method is based on the computation of the cross-correlation function between waveforms. On the distribution of the cross-correlation matrix, signals belonging to multiplets are clearly identified and permit to automatically clustered. This paper develops the steps of the method, presents results obtained on a dataset of a fatigue test and shows its noise robustness.
Experimental characterization, modelling and simulation of ae signal due to crack propagation in PMMA
Authors:   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Chen Xi ,   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Godin Nathalie ,   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Doitrand Aurelien ,   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Fusco Claudio
Published: December 2022

Acoustic Emission (AE) is a non-destructive instrumentation that allows the detection of cracking,

which dissipates elastic waves resulting from local crack-induced displacement jumps within the

material. However, based on the AE experiments, a link between the crack fracture mechanics and

the AE features is difficult to establish quantitatively, especially under quasi-static and dynamic

loading conditions. Numerical simulations have proved to be very promising for this purpose. In

this study, Pencil-Lead Break (PLB) tests are carried out on PMMA plate specimens with different

thicknesses in order to determine the damping characteristics of PMMA and experimentally

validate the AE numerical simulations. The influence of the specimen thickness, the distance

between the sensor/source and the type of sensors on the measured acoustic emission are also

studied.
Acoustic emission generated by alternating magnetic field
Authors:   University of Dunaujvaros (DUF), Por Gabor ,   University of Dunaujvaros (DUF), Szabó Szebasztián ,   University of Dunaujvaros (DUF), Morvai Tibor ,   University of Dunaujvaros (DUF), Koroknai Laszló ,   University of Dunaujvaros (DUF), Szabados Ottó
Published: December 2022

Stresses born in the solid state may trigger acoustic emission (AE). Stresses are traditionally caused by mechanical forces and/or pressures implemented to the surface of the material. However, inner stresses in solid state may be born due to changing of magnetic field or due to temperature changes especially when cooling down the material, for example in structure changing. It is also well known that elongation of material structures due to rolling may lead to different AE bursts, which may be used for characterization of the structure of material due to cold forming. In the presentation we show in experiments that alternating magnetic field leads to AE burst, which have larger magnitude where the gradient of the changes of magnetic field is larger in absolute value. We also demonstrate correlation of the RMS of AE signals with the direction of the elongation of steel structure. This opens the way to investigate anisotropy in steel sheets. We also investigated the dependence of the measure of acoustic emission on frequency and on different sinus, triangle and rectangle forms in alternating magnetic field. EWGAE 35, Ljubljana, Slovenia, 13th – 16th Sep. www.ewg
A computational study of AE signal due to fiber break and fiber matrix debonding in model composite
Authors:   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Hamam Zeina ,   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Godin Nathalie ,   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Doitrand Aurelien ,   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Fusco Claudio ,   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Monnier Thomas
Published: December 2022

Acoustic emission monitoring is a useful method to deal with detection and identification of damage in composite materials during mechanical tests. From an experimental point of view, it is not straightforward to establish a quantitative link between the damage sources and AE signals. Modeling and numerical simulations appear as a promising way to reach this objective. In this study, Finite Elements Modeling (FEM) was used to simulate AE signals due to fiber break and fiber/matrix debonding in a model carbon fiber composite. A specimen made of a single carbon fiber and epoxy matrix was used to experimentally validate the simulated fiber break AE signals. The objective was to compare the AE signals from a validated fiber break simulation (Fig. 1a) to the AE signals obtained from fiber/matrix debonding (with several models) and fiber break obtained in several media and to discuss the capability to detect and identify each source (Fig. 1b). The influence of the type of sensor, specimen geometry and AE source location were also studied. The proposed model was extended to identify the main parameters that influence the acoustic emission signatures. These validated results open the way to combine the experimental and the simulated data to generate a library in order to identify real-time damage mechanisms. Fig. 1: (a) Amplitude and roll-off frequency vs. source/sensor distance for experimental signals and numerical signals. (b)Evolution of Partial Power PP1 [0–125 kHz] as a function of amplitude obtained with a nano 30 sensor for several sources. Fiber break and debonding (L = 20 μm or 100 μm). EWGAE 35, Ljubljana, Slovenia, 13th – 16th Sep. www.ewg
Study of dislocation dynamics of copper single crystals under cycling loading through acoustic emission and microstructural characterizations
Authors:   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, L’hôte Gabriel ,   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Cazottes Sophie ,   University of Grenoble (UJF)-Alpes, Montagnat Maurine ,   National Institute of Applied Science ( INSA-Lyon)- University of Lyon, Deschanel Stéphanie
Published: December 2022

During plastic deformation of crystalline materials, a soft plasticity, made of numerous uncorrelated dislocation movements coexists with a wilder plasticity, in the form of collaborative movements: dislocation avalanches. The coexistence of the two plasticities depends on the establishment of a dislocation structure, which is supposed to hinder the propagation of avalanches. We propose to study the correlation between the microstructural evolution of the dislocation arrangements and the nature of the dislocation dynamics, during cyclic loading of pure copper single crystals. Different fatigue tests with imposed stress amplitude are performed to study the influence of (i) the loading path, (ii) the loading ratio and (iii) the crystallographic orientation on the plasticity phenomena. The acoustic emission (AE) technique is used to study both types of plasticity : the continuous AE is associated with soft plasticity and the discrete AE with wild plasticity. The dislocation microstructures are studied using EBSD (crystal disorientation) and ECCI (Electron Channeling Contrast Imaging) techniques at the end of each fatigue stage. The AE-ECCI coupling gives valuable information about the dislocation dynamics of dislocations. This study shows a certain universality, with (i) the existence of dislocation avalanches, produced during a more or less deep reorganization of the structures, (ii) a progressive evolution, during the cycles, of the dislocation mean free path, associated with the emergence of a dislocation structure and (iii) an inhibition of avalanches during the emergence of a dislocation arrangement. EWGAE 35, Ljubljana, Slovenia, 13th – 16th Sep. www.ewg
Molecular Docking and Analysis of In Silico Generated Ligands against SARS-CoV-2 Spike and Replicase Proteins
Authors: Okeke Ifeanyichukwu
Published: December 2022

Purpose: The novel coronavirus also known as coronavirus disease 2019 (COVID-19), or Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), which broke out in the latter part of the year 2019, took the entire human race unawares. This sis due to its devastating health, social and economic consequences. In this study, the ability of some small molecules to interact with some SARS-CoV-2 proteins was investigated in silico for the purpose discovering molecules which can be employed in the areas COVID-19 diagnosis and treatment.
Methodology: By way of molecular docking, a library of in silico generated ligands was docked to SARS-CoV-2 spike and replicase proteins to identify leads with propensity to bind them with high affinity. The identified leads proved to bind these proteins with stronger affinity than the native ligand aiding in their in vivo metabolic processes.
Findings: It was observed that spike protein binds to its cellular receptor with binding affinity of -4.8Kcal/mol; it binds to a non cellular analogue with -5.4, while 4twy 3BL and 5n19 D03 bind spike protein with binding affinities of -7.3Kcal/mol each. They also bind replicase protein with -8.2 and -7.2 Kcal/mol respectively. 5c8s G3A and 2d2d ENB were identified as the most suitable leads for SARS-CoV-2 spike protein detection, while 3d62 959 and 1r4l XX5 were identified as leads with most suitable druglikeness against SARS-CoV-2. These findings indicate that the identified ligands can preferentially displace or inhibit binding of the viral proteins to their native endogenous ligands and that both cellular attachment through spike and ACE2 interaction, and viral replication process can both be inhibited by using just one of the substances identified. This study is part of efforts in finding non recombinant nucleic acid solutions to SARS-CoV-2 diagnosis and treatment. If these findings are implemented, they can enhance efficient detection of the virus antigens from biological samples.
Conclusion: Identifying molecules that can interact with SARS-CoV-2 proteins could optimize diagnostic and therapeutic care for patients infected with the virus.
Recommendation: Based on the study, 5c8s G3A and 2d2d ENB were identified as the most suitable leads that are favorably disposed for SARS-CoV-2 spike protein detection from biological samples. Also, 3d62 959 and 1r4l XX5 were identified as leads with most suitable drug likeness against SARS-CoV-2 based on the filters from SwissADME and Molinspiration cheminformatics and therefore deserve further in vitro and in vivo evaluations.
Perencanaan dan Implementasi Penggunaan Keran Wastafel Otomatis Berbasis Mikrokontroler Arduino Uno dalam Penanggulangan Pencegahan Covid-19 pada Pasar Tradisional Desa Suka Maju
Authors: Chandra Yudi , Radwitya Erick , Alkadrie Sy. Ishak
Published: December 2022

Community service is one of the pillars of the Tri Dharma of Higher Education, in addition to the Dharma of Education and Teaching and the Dharma of Research. This time, the Ketapang Polytechnic Community Service Program aims to apply knowledge that can be used by the public in the prevention of the spread of Covid-19 which can be contagious in crowded places.
Covid-19 is a virus that is easily transmitted through human touch and from human beings to human beings, and it can be said that the Covid-19 virus is easily transmitted in crowded places in the community. One of the most crowded places in the community is the traditional market, which is still active, namely the traditional BUM Desa Karya Maju market which is located on the Poros Sukadana-Ketapang road, Muara Pawan District, Suka Maju Village.
Through the Community Service Program the initiative to make a tool that can overcome the prevention of the spread of covid-19. One method of preventing Covid-19 is to always wash your hands after touching so as to make an automatic sink faucet based on the Arduino UNO microcontroller. The tools that are made can be moved according to the expectations of the partners. The components of the tool are the seat frame, barrel, sink, wheels and control components. The control components consist of an adapter, charger module, battery, switch, Arduino UNO module, relay module, ultrasonic sensor and PMPA DC.
Simulation of flow through an equispaced in-line cylinder in open channels
Authors: Talab Al-Osmy , Al-Hashimi Shaymaa , Mulahasan Saad , Fartosy Sabah
Published: December 2022

In this work, a numerical simulation using Computation Fluid Dynamics technique was used to investigate the flow properties and turbulence characteristics through flow of one-line cylinder in an open channel with uniform flow conditions. A two-dimensional turbulence model was applied using ANSYS. Flow properties were investigated against varying cylinder diameters that forms a one-line cylinder physical model and varying flow rates. Three cylinders diameters D were used (5.0 cm, 2.5 cm and 1.25 cm) and located at 12.5 cm apart along the flume centreline. Spatial distributions of mean-stream-wise velocity, pressure, turbulent kinetic energy, and eddy viscosity were estimated. Results showed symmetrical distribution of flow velocity, turbulence eddy, and turbulent kinetic energy along the one-line cylinder for the largest cylinder diameter. Vortex shedding patterns were well predicted by the numerical simulation behind the cylinders. Different configurations of vortices distribution behind the cylinders were recorded for the diameters of 1.25 cm and 2.5 cm. The flow pattern difference between the largest diameter (5 cm) and the small diameters (2.5 cm and 1.25 cm) was leaded to the strong overlap for the vortices in the wake for the lined cylinders with the large diameter in comparison to the other diameters. Consequently, this study is investigated the different diameter sizes of a one-line cylinder with the same spacing between them on the flow pattern along the channel.
Insider and Outsider, Community and Conflict: Elizabeth Cecil Wilson’s transnational experiences as a Progressive American woman educator
Authors: Rousmaniere Kate
Published: December 2022

This essay takes a feminist educational biographical approach to the transnational life and work of the American educator Elizabeth Cecil Wilson (1913-1994). Central to this interpretation is the way in which Wilson’s life exemplifies the concept of “internal exile” as a result of her transnational movements in China, Korea, and the United States. Wilson’s early experiences with internationalism, all-women’s education and American progressive education shaped her interpretation of her later work in educational administration, leading her to develop a unique perspective about being both an “insider” and an “outsider” in her world. Raised in a variety of close and strongly identified communities, in her later professional life she experienced a sense of isolation and displacement in the structured hierarchical environments of international organizations and American state school systems. Late in life, she articulated this challenge in feminism when she argued for women’s inclusion in formal educational leadership.
El exilio interior de Leonor Serrano, Josefa Herrera y Ángela Sempere, tres inspectoras sancionadas en la dictadura primorriverista
Authors: Agulló Diaz Maria del Carmen
Published: December 2022

Dentro del clima de represión y control ejercido por la Dictadura de Primo de Rivera sobre la inspección de primera enseñanza, cabe enmarcar la promulgación de la R.O. de 19 de abril de 1928 que implicó el traslado forzoso de sus destinos de diecisiete de sus miembros, entre los que se encuentran las inspectoras Leonor Serrano Pablo, Josefa Herrera Serra y Ángela Sempere Sanjuán, desplazadas con una intencionalidad punitiva.En busca de las causas que provocaron estas sanciones, desconocidas por no haberse instruido expedientes, se analizan sus trayectorias vitales y profesionales y se sugiere que estuvieron marcadas por la variable género, al estar motivadas por actitudes de desobediencia a órdenes de las autoridades, y por la manifestación de ideas calificadas de peligrosas, relacionadas con los derechos de las mujeres. Dichos comportamientos son incompatibles con los presupuestos autoritarios del régimen, y con su definición tradicional de la identidad femenina.Apartadas de sus destinos y desplazadas de sus ciudades de residencia, obligadas a reiniciar sus prácticas profesionales en un entorno adverso, sobrevivieron al exilio interior compaginando una actitud de protesta ante su injusta situación, con una intensa actividad profesional, vinculada con la renovación pedagógica.
Profesoras de Instituto y de Escuela Normal sancionadas en Andalucía durante la guerra civil española: apuntes biográficos
Authors: Grana Gil Isabel , Martín Zúñiga Francisco , Trigueros Gordillo Guadalupe
Published: December 2022

El objetivo del artículo es «sacar del olvido» y, por tanto, «visibilizar» a las profesoras de los institutos y escuelas normales de Andalucía que fueron sancionadas durante la guerra civil. El silencio lleva al olvido por parte de los propios protagonistas y, sobre todo, a la ignorancia de aquellos que no han vivido los hechos. Pretendemos rescatar de ese olvido a aquellas profesoras y con ello recuperar su nombre y su memoria.La metodología aplicada ha sido la histórico educativa a través de la revisión de la bibliografía existente sobre el desarrollo de los distintos procesos de depuración y, fundamentalmente, de la utilización de fuentes primarias —expedientes personales de depuración, actas de las escuelas normales, etc.—. Ello nos ha permitido realizar una semblanza, aunque sea breve, de las distintas profesoras y, con ello, pretendemos contribuir a mitigar la escasa historiografía que existe sobre esta temática.
El trabajo se ha estructurado en tres partes: una primera dedicada a reflexionar sobre las peculiaridades de exilio interior al que se vieron sometidas las profesoras; en una segunda destacamos las peculiaridades generales de la depuración, tanto a nivel de institutos como de escuelas normales, en lo que se refiere al número de sancionadas, cargos imputados, tipo de sanciones, etc. y, por último, nos centramos ya en las biografíasde las profesoras.
Scripting silence: the expanded screenplay as present-traumatic language
Authors:   , Bolland Emma Zoë Claire
Published: December 2022

This research orbits the ‘auto’, a personal and critiqued experience of psychiatric and psychoanalytical treatments: on the one hand a pathologised fixing of speech, on the other the possibilities of new and fluid approaches of speaking and listening to trauma. My practice artefact, Instructions from Light, employs a constellation of methods that turn on an expanded translation and critical examination of the French filmmaker Louis Delluc’s screenplay for his impressionist film LE SILENCE (1920). Instructions from Light manifests as a collage of hybrid writing and found / reworked image and also embeds my translation of LE SILENCE, the first into English. Through uncoupling the idea of ‘screenplay’ from a fixed and finished endpoint of film, working with this form that maps and narrates in the present tense, I reject ideas of the post-traumatic and formulate a new concept, the presenttraumatic. I refigure screenwriting as resistant, metaphorical, and mobile. Although currently on the page, Instructions from Light emerges from processes of speaking and listening—rehearsal, performance, discussion, and symposia—an actual and metaphorical polyphony. I follow Audre Lorde in asking ‘What are the words you do not yet have? What do you need to say?’1 Employing metaphor as ‘meta-methodology’ I offer a new approach for working critically across disciplines—screenwriting, translation, psychology, language practices, and a politicised autotheory. Translation as method is used as an embodiment of struggle—I deliberately chose LE SILENCE as my ‘practice-centre’ because it is written in a language I could not, at the outset of the research, understand. This research is not interdisciplinary, but transdisciplinary, demanding a new approach in producing a neologism—presenttraumatic— that is more than the sum of the disciplines I inhabit. Present-traumatic is a critical concept through which silence can speak and interrogate hierarchies of communication.
Validation of «Tell Me How You Read» Reading Strategies Questionnaire for Upper-Secondary School Students
Authors: Castellana Giusi , Mitrovic Snezana
Published: December 2022

The study presents the factorial validity of the version of the questionnaire on reading strategies, «Tell me how to read», aimed at the students of upper-secondary schools. The dimensions investigated correspond to the 7 strategies already validated in the previous versions (lower secondary and primary school, pilot study; Castellana, 2018, 2020a; Castellana & Lucisano, 2021): Identifying reading purposes; Activating previous knowledge; Making predictions; Identifying the most important information; Using graphic organizers; Controlling, Monitoring and a scale on the perception of difficulty. The questionnaire consisting of 57 items, was administered to a convenience sample of 1527 students, attending upper-secondary school. Results of the factor analysis confirm the seven-dimensional structure while Cronbach’s alpha ranges from .836 to .925, with the total reliability coefficient of .933. Furthermore, data analyses reveal strengths and weaknesses of the readers in terms of the strategies they employ and suggest areas and paths for improvement of their reading skills, stressing once again the importance of tools aimed at measuring the use of metacognitive strategies.
Explicit and Implicit Biases in Students’ Skin Colours Aesthetic Preferences
Authors: Perillo Giovanni , Mastandrea Stefano
Published: December 2022

Several tools have been employed to detect the emergence and development of racial stereotypes and prejudices among little children and adolescents. In our study, we confront some of these tools, and present the results of the Skin Colours Test. In its specificity, the Skin Colours Test proposes a change in the object of investigation (appreciation of the homogeneity or heterogeneity of colours) and aims to detect explicit and implicit stereotypes and prejudices of boys and girls regarding aesthetic choices (even neutral choices) concerning skin colours. Sample: one group of 129 (64 F) students (M = 12.31), almost all of Italian descent, and another group of 129 (62 F) students (M = 12.36), less than 30% of different descents. Method: three pictures, each made up of 16 skin colours, were shown and students were asked to vote on their aesthetic preference between homogeneity or heterogeneity of skin colours and to give reasons for these choices. Main results: the motivations for some choices that preferred skin colour heterogeneity (neutral choice) over homogeneity, brought out stereotypes and biases. In addition, we consider the contextual specificities that the Skin Colours Test detects as crucial in order to detect specific educational needs and structure targeted educational interventions.
Development of Habits of Mind Instruments in the Context of Basic Physics Practicum: EFA and Rasch Model
Authors: Ubaidillah Mujib , Marwoto Putut , Wiyanto Wiyanto , Rusilowati Ani , Subali Bambang , Mindyarto Budi , Isnarni Wiwi
Published: December 2022

Assessing the habits of mind among prospective teachers is an essential part of learning. Therefore, this research aims to develop the habits of mind instrument in the context of basic physics practicum. It was conducted using the research and development method which has three stages namely (1) planning the test, (2) implementing the test, and (3) determining the validity and reliability. The sample consisted of 105 biology teacher candidates taking basic physics courses. The habits of mind instrument developed was in the form of a questionnaire consisting of 52 items and is related to basic physics practicum. Furthermore, exploratory factor analysis and the Rasch model approach were used in developing the instrument. Based on expert judgment using Fleiss Kappa, the content validity was 0.700 and was classified in the good category. The developed instrument was considered reliable based on Cronbach’s alpha value of 0.970. The exploratory factor analysis reduced the dimensions of the instrument to 11 factors. The analysis of the Rasch model met the element of unidimensionality. There is no bias on the instrument based on gender and place of residence. However, efforts are needed to overcome the lack of creative thinking habits among prospective biology teachers.