bluuebunny/crossref_metadata_2025 huggingface dataset:
The Bukovynian lipovans: Emergence on the territory of the region and the meaning of the ethnonym in the oral tradition
Authors: Vorotniak Ivan
Published: July 2022

In this article, the author analyzes the content of oral evidence available among the Bukovynian Lipovans about the time and circumstances of the resettlement of their ancestors to the territory of the region, as well as the etymology of the ethno-confession name «Lipovans». As the researchers note, among modern Old Believers there are still oral stories that record the process of settling in the possessions of the Habsburgs. Usually, representatives of the older generation act as carriers of the oral tradition, who, in turn, heard stories from their parents. They pass on information to the next generation. Almost all Lipovans, despite their age, demonstrate their awareness in this matter. Note that their level of awareness depends on their personal interest in their own past and on the amount of accumulated facts. Usually such legends exist in the form of a tribal tradition.In the folk environment, several variants of legends about the appearance of the ethnonym «Lipovans» have developed. They are based on: a) characteristics of the terrain; b) the names of the original settlements; c) the names of the leaders. The most popular opinion is that the first settlers settled in linden forests, that is, the term «lipovan» comes from the name of the linden tree.Bukovynian Lipovans called themselves that, not seeing anything sane in it. As the informants themselves explained, this was done so that the Russians would not find out about them. Researchers consider this explanation logical, given the previous persecution after the reform of Patriarch Nikon.In everyday life, a certain distinction was formed in the use of terms, each of which occupied its own sphere: in everyday use and in publications on everyday topics – «Lipovans»; in publications that cover the life of the community – «Russian-Lipovanі»; in church life – «Old Believers». Such a division of spheres of application also determines the further coexistence of the ethnonym «Lipovans» and the accompanying designations of the Bukovynian Old Believers diaspora.
«Moving by light» (lat. a lumine motus) – a device for determining the sides of horizon and time
Authors: Yatsenyuk Fadey
Published: July 2022

Book review: Mykola Ilkiv. Portable sundial from the Khotyn fortress: Attribution, usage features, space-time context. Chernivtsi: Technodruk, 2019. 208 p.
Ethnic identity and its Ukrainian variety
Authors: Yurii Mykhailo
Published: July 2022

The article argues that ethnic identity means one of the forms of self-consciousness of an individual or group of people, which is based on their sense of belonging to a particular ethnic community. The foundation of ethnic identity is a set of anthropological and cultural-symbolic features rooted in historical memory (common origin, language, religion, place of residence, traditions, customs, etc.). Under certain conditions, identification with an ethnic group stimulates the self-organization of the ethnic community on the basis of ethnic interests and needs, as well as provides self-defence in situations of interethnic tension. It determines the tone of interpretation of historical experience and orientational cultural priorities, mostly turned to the past. Ethnic identity is based on the «voice of blood» and is rooted in the peculiarities of the psychological composition, temperament, ethno-demographic potential of people who are its representatives.The existence of an ethnic form of group identity or territorial patriotism has no special political significance until it unites with the idea of a nation. As for the Ukrainian variety of ethnic identity, it was formed in accordance with the principles set out above throughout the history of the Ukrainian people, from the times of Kyivan Rus to the present. Awareness of the unity of the ethnic group, defined as the Ukrainian people, at different times had different degrees of depth and different territorial and tribal content.The author came to the conclusion that after gaining independence there were contradictions and internal weakness of the Ukrainian state, as the peaceful nature of the national revolution was not accompanied by adequate renewal of power structures. Accordingly, all mechanically adopted Western recipes for building market relations, etc., not supported by a reliable regulatory framework and not based on socio-psychological, moral, professional preparedness of society, gave the exact opposite of the desired results.
Tensor compaction of porous rocks: theory and experimental verification
Authors: Panteleev Ivan , Lyakhovsky Vladimir , Mubassarova Virginiya , Karev Vladimir , Shevtsov Nikolaj , Shalev Eyal
Published: July 2022

Compaction in sedimentary basins has been traditionally regarded as a one-dimensional process that ignores inelastic deformation in directions orthogonal to the active load. This study presents new experiments with sandstone demonstrating the role of three-dimensional inelastic compaction in cyclic true triaxial compression. The experiments were carried out on the basis of a triaxial independent loading test system in the Laboratory of Geomechanics of the Ishlinsky Institute for Problems in Mechanics of the Russian Academy of Science. The elastic moduli of the material were estimated from the stress-strain curves and the elastic deformations of the sample in each of the three directions were determined. Subtracting the elastic component from the total deformation allowed to show that inelastic compaction of the sandstone is observed in the direction of active loading, whereas in the orthogonal directions there is a expansion of the material. To describe the three-dimensional nature of the compaction, a generalization of Athy law to the tensor case is proposed, taking into account the role of the stress deviator. The compaction tensor and the kinetic equation to describe the evolution of inelastic deformation, starting from the moment of the load application are introduced. On the basis of experiments on cyclic multiaxial compression of sandstone, the identification and verification of the constructed model of tensor compaction were carried out. The possibility of not only qualitative, but also quantitative description of changes in inelastic deformation under complex cyclic triaxial compression is shown.
Development of a pump-ejector system for SWAG injection into reservoir using associated petroleum gas from the annulus space of production wells
Authors: Drozdov Alexander , Gorelkina Еvgeniya
Published: July 2022

Implementation of SWAG technology by means of water-gas mixtures is a promising method of enhanced oil recovery. The use of associated petroleum gas as a gas component in the water-gas mixture allows to significantly reduce the amount of irrationally consumed gas and carbon footprint. Relevant task is to choose a simple, reliable and convenient equipment that can operate under rapidly changing operating conditions. Such equipment are pump-ejector systems. In order to create water-gas mixture it is proposed to use associated gas from the annulus space. This solution will reduce the pressure in the annulus space of the production well, prevent supply disruption and failure of well equipment. The paper presents a principal technological scheme of the pump-ejector system, taking into account the withdrawal of gas from the annulus space of several production wells. The layout of the proposed system enables more efficient implementation of the proposed technology, which expands the area of its application. Experimental investigations of pressure and energy characteristics of the ejector have been carried out. Analysis of the obtained data showed that it was possible to increase the value of maximum efficiency. The possibility of adapting the system in a wide range of changes in operating parameters has been established. Recommendations on selection of a booster pump depending on the values of working pressure and gas content are given.
KEMAMPUAN MENENTUKAN HARGA POKOK PRODUKSI DAN HARGA JUAL YANG TEPAT PADA UMKM KOTA TEGAL DI TENGAH MASA PANDEMI COVID 19
Authors: Harjanti Ririh Sri , Hetika Hetika , SU Erni Unggul , K Anita , Maulidah Hikmatul , Iqmarina Iqmarina
Published: July 2022

Salah satu kesulitan yang dialami oleh UMKM di Kota Tegal adalah bagaimana menentukan harga jual yang tepat di situasi pandemi seperti sekarang ini. Situasi yang dihadapi UMKM adalah jika menjual produk dengan harga yang tinggi maka produk tidak akan laku di pasaran karena daya beli masyarakat sedang rendah. Apabila menjual produk dengan harga yang rendah maka UMKM akan mengalami kerugian usaha. Daya beli masyarakat yang rendah membuat UMKM harus memutar otak dalam menghasilkan pendapatan walau seminimal mungkin namun harus tetap memperoleh laba. Karena inti dari tujuan usaha adalah memperoleh penghasilan atau pendapatan. Tujuan dari kegiatan pengabdian masyarakat ini adalah untuk memberikan pelatihan ketrampilan dalam menghitung Harga Pokok Produksi dan menentukan Harga Jual yang tepat untuk para pelaku UMKM di Kota Tegal. Metode yang digunakan dalam kegiatan pengabdian adalah berupa pelatihan Menghitung Harga Pokok Produksi dan Harga Jual yang tepat dengan menggunakan program MS. Excel dan praktik input data dari MS. Excel ke Aplikasi Akuntansi UKM.Hasil kegiatan pengabdian adalah para pelaku UMKM di Kota Tegal dapat menerapkan kemampuan menghitung Harga Pokok Produksi dalam Program MS. Excel dan mampu menginpu data dari Program MS. Excel ke dalam aplikasi Akuntansi UKM.Kata kunci : Harga Pokok Produksi, Harga Jual
Geschlechterstereotype decodieren? Technologien für geschlechtergerechte Stellenanzeigen
Authors: Dill Katja , Mihaljević Helena , Müller Ivana , Yollu-Tok Aysel
Published: July 2022

Mit der Digitalisierung der Arbeitswelt werden zunehmend Technologien eingeführt, die eine geschlechtergerechte Personalgewinnung fördern sollen, darunter Tools zur Optimierung von Stellenausschreibungen. Wir untersuchen drei dieser Tools anhand ihrer theoretischen Grundlagen und ihrer Funktionsweise aus einer Geschlechterperspektive, um die Möglichkeiten und Grenzen technologischer Übersetzung von wissenschaftlichen Erkenntnissen sowie deren (Aus)Wirkungen zu diskutieren. Hierfür wurde ein Korpus von mehr als 160.000 Stellenanzeigen auf drei Jobplattformen verglichen. Trotz gemeinsamer theoretischer Bezugspunkte zeigt sich, dass sich die Tools in ihrer Funktionsweise und den Ergebnissen grundlegend unterscheiden.
Berufliche Inklusion durch digitale Medien. Eine medienpädagogische Perspektive
Authors: Sonnenschein Nele
Published: July 2022

Bei der Umsetzung von Inklusion in der Arbeitswelt können digitale Medien eine Schlüsselfunktion einnehmen. In diesem Beitrag werden Chancen und Herausforderungen im Kontext von Arbeit, Inklusion und Digitalisierung aus einer medienpädagogischen Perspektive beleuchtet. Ansätze der Inklusiven Medienbildung werden schrittweise mit berufs- und wirtschaftspädagogischen Überlegungen in Verbindung gesetzt. Entlang der Dimensionen einer Teilhabe in, an und durch Medien werden Potenziale zur Förderung der beruflichen Inklusion von Menschen mit Behinderungen aufgezeigt.
EXACT SOLUTION FOR THE STRESS RELAXATION PROBLEM IN A THICKWALLED TUBE OF A NONLINEAR VISCOELASTIC MATERIAL OBEYING THE RABOTNOV CONSTITUTIVE EQUATION
Authors: Khokhlov A.V.
Published: July 2022

We constructed and studied analytically the exact solution of the quasi-static boundary value problem for a hollow cylinder (a tube) made of physically nonlinear homogeneous isotropic viscoelastic material obeying the Rabotnov constitutive equation with two arbitrary material functions (a creep compliance and a function which governs physical nonlinearity). A time-dependent displacement and zero shear stresses are given on the inside cylinder surface, a pressure (normal stress) is given on outside surface and zero axial displacements and zero shear stresses are preset on the end cross sections of the tube (thus, cylinder stress and plain strain are realized in a tube). We supposed that a material is incompressible and that given boundary displacement and pressure vary slowly enough with time to neglect inertia terms in the equilibrium equations. We obtained explicit expressions for strains and stresses at any point via the ratio of a tube radii, given external pressure and integral operators involving composition of two material functions of the constitutive relation and displacement preset on the internal cylindrical surface.

In particular, assuming given boundary displacement and pressure are constant we considered the stress relaxation problem. For arbitrary material functions, we calculated all the hereditary integrals involved in the general representation for the stress field and reduced it to simple algebraic formulas convenient for analysis and use. We studied analytically general properties of the stress relaxation curves at any point of a tube and features of stress distributions along radius. We proved that the first material function (relaxation modulus) of the constitutive equation governs completely stresses dependence on time and the second one (non-linearity function) governs only stresses dependence on radial coordinate and found out that hoop stress and axial stress can change sign and can increase, decrease and be non-monotone with respect to radial coordinate. In case of zero external pressure, we proved that all stress relaxation curves at any point of a tube are proportional to each other (ratio of stresses at different points doesn't depend on time), decrease with time and have no flexure points. We also calculated integral mean values of axial and hoop stresses and discovered that their ratio depends on thickness/radius ratio only and doesn't depend on time and material functions although mean stresses do.
STRESS-DEFORMED STATE OF THE SHALLOW TUNNELS REINFORCED BY LAYERED SHELLS UNDER THE ACTION OF TRANSPORT LOADS
Authors: Alexeyeva L.A. , Ukrainets V.N. , Girnis S.R.
Published: July 2022

Based on the solution of the problem of the action of a transport loads moving at a constant speed on a three-layer or two-layer shells in an elastic half-space, a comparative analysis was performed for the rock mass in the vicinity of a shallows circular tunnel with various designs of their lining (three-layer and two-layer), along the inner surface of which an axisymmetric normal load moves at a constant speed. The inner layer of the three-layer lining is a thick-walled concrete shell, and the outer layers are thin-walled steel shells of equal thickness. The two-layer lining is structurally different from the considered three-layer lining by the absence of the inner layer of the lining.

Dynamic equations of elasticity theory in Lame potentials are used to describe the motion of the half-space and the inner layer of the shell. The vibrations of the outer layers of the shell are described by the classical equations of the theory of thin shells. The equations are represented in a movable coordinate system. The contact between the shell and the array is assumed to be either rigid or sliding. The contact between the layers of the shell is supposed to be rigid.

To solve the problem, the method of incomplete separation of variables is used. The solution for potentials is presented in the form of a superposition of Fourier-Bessel series and contour integrals of the Fourier type. Next, the method of decomposition of potentials into plane waves and re-decomposition of plane waves into series according to cylindrical functions is used. The solution is obtained for the case when the velocity of the load is less than its critical velocities.

The calculation results are presented in the form of graphs and are analyzed in detail. From the analysis of the calculation results, it follows that the use of a three-layer lining as a building envelope is more efficient than a two-layer lining, since in this case the dynamic effect of the moving loads on the rock mass is significantly less.
MATHEMATICAL MODELING OF THE VIBRATIONS PROPAGATION IN THIN-WALL FRAMEWORK STRUCTURES. 1. BASIC RELATIONS AND ANALYTICAL SOLUTIONS OF TYPICAL PROBLEMS
Authors: Paimushin V.N. , Firsov V.A. , Shishkin V.M.
Published: July 2022

The design features of the of thin-walled aerospace, shipbuilding, etc. structures in the form of a load-bearing frame sheathed with thin-walled panels, walls, bulkheads, etc. are discussed. Variants of constructive coupling of the specified thin-walled panels with supporting elements of the load-bearing frame and methods for their mathematical description in the classical mechanics of a deformable solid body are considered. It is proposed, without distorting the physical picture of the dynamic behavior of thin-walled panels, to present them in the form of multisupport thin bars resting on rigid elements of the load-bearing frame along part of their front surface. By the example of a plane dynamic problem of the mechanics of a bar with a fixed section of finite length on one of the front surfaces, it is shown that in the study of deformation processes, taking into account the compliance of the fixed section, it is necessary to introduce the concept of transformation of the stress-strain state parameters and the mathematical models used to describe them. Such a transformation takes place when crossing the border from an unfixed section to a fixed one (from a fixed to an unfixed one). Within the framework of the classical Kirchhoff–Love model, it is impossible to take into account the compliance of the fixed section of the bar, and when using the simplest refined shear model of S.P. Timoshenko, such accounting is possible when fixing the length only on one of the front surfaces. In particular, previously discovered and not described in the scientific literature phenomenon of the vibrations transmission through the support joints, regardless of their design, is carried out due to the transformation of the stress-strain state of the dynamically loaded section of the bar into longitudinal-shear vibration modes of the bar in the clamped area, followed by their retransformation into bending vibrations of the adjacent span. Within the framework of S.P. Timoshenko model, the main resolving equations are constructed, and the kinematic and force conditions for conjugation of fixed and non-fixed sections of the bar are formulated. On the basis of the developed mathematical model, exact analytical solutions of typical problems are constructed, confirming the transmission of vibration through the clamped sections of the bar due to the deformability of the marked sections. A significant increase of transverse shear stresses level in the clamped section of the bar in the vicinity of the junction of the unfixed section with the fixed one is revealed.
MODELING OF THE DISTRIBUTION OF RESIDUAL POROSITY OF A METAL PRODUCT IN ADDITIVE MANUFACTURING WITH LAYER-BY-LAYER FORGING
Authors: Keller I.E. , Kazantsev A.V. , Dudin D.S. , Permyakov G.L. , Trushnikov D.N.
Published: July 2022

Porosity, which occurs in products made of aluminum-magnesium alloys synthesized by wire-arc surfacing, significantly worsens the characteristics of fatigue strength. The developed technology of hybrid additive manufacturing with layer-by-layer forging of each deposited layer of material is able to minimize the porosity of the product. To select the rational parameters of the technological process, the evolution of the porosity distribution over the cross-section of a linear element after its single forging with a pneumatic hammer is investigated. A numerical model of the process is constructed in the LS-DYNA® package, where the Gurson–Tvergaard–Needleman relations are taken as constitutive equations of plastic deformation of the material and porosity evolution. To determine the parameters of the Johnson–Cook hardening law, tests of the AMg6 alloy were performed in a wide range of strain rates. The impact of the pneumatic hammer in the numerical model was calibrated using an accelerometric and strain-gauged steel target, as well as by distortions of the cross-section of a forged bar made of AMg6 alloy. Calculations according to the model are compared with experimental data, for which two linear segments were made by additive manufacturing with and without layer-by-layer forging, from the cross-sections of which the slots processed for pore visualization were prepared. With this method of pressure treatment, the decrease in porosity in the boundary layer of the workpiece mainly depends on the accumulated plastic deformations and does weakly sensitive the appearance of a stressed state. The model allows you to predict the size of the area under the hammer head depending on the processing mode, within which the porosity is eliminated by forging. The use of such modes will ensure the manufacturing of products without residual porosity in the processes of additive manufacturing by surfacing with layer-by-layer forging.
EFFECT OF STRAIN ON THE ELASTIC ANISOTROPY AND ULTRASONIC WAVE VELOCITIES IN LOW-CARBON STEEL
Authors: Gonchar A.V. , Kurashkin K.V. , Sergeeva O.A. , Solovyov A.A.
Published: July 2022

The results of experimental studies of the effect of plastic deformation on the velocities of transverse, longitudinal and head waves in hot-rolled sheet steel 20 are presented. Sheet-type specimens cut from the sheet along and across the rolling direction were tested in stages for uniaxial tension with a residual strain step of 4%.The tensile diagrams obtained for the specimens have the yield plateau, which is typical for low-carbon steel. After each stage, the specimens were unloaded and structurally sensitive ultrasonic measurements were carried out using shear, longitudinal and head wave transducers.It is found that the velocities of shear and longitudinal waves vary slightly until the moment of loss in local stability and the velocity of head waves decreases monotonically and in fact linearly with plastic deformation. The change in the anisotropy of the material elastic properties during plastic deformation is also investigated: monotonic dependences of the acoustic anisotropy parameter (birefringence of shear waves) and the relative difference in the velocities of longitudinal and head waves on the residual plastic strain are obtained. The presented ultrasonic investigations provide information about changes in the material structure due to plastic deformation: texture evolution and microdamage accumulation. Correlations between the material damage parameter and the elastic anisotropy parameters are obtained, which can be used for ultrasonic monitoring the state of plastically deformed steel.

Additional optical studies of microstructure evolution on the surface have shown that during plastic deformation, grain rotations and localization of plastic deformation (Luders–Chernov bands) occur, as evidenced by the defocusing of individual microzones of the image, and persistent slip bands are formed in individual grains.
EVALUATION OF RESOURCE CHARACTERISTICS OF POLYCRYSTALLINE STRUCTURAL ALLOYS DURING DEGRADATION BY JOINT MECHANISMS OF FATIGUE AND CREEP OF THE MATERIAL
Authors: Volkov I.A. , Igumnov L.A. , Shishulin D.N. , Yakovlev S.G.
Published: July 2022

The problem of assessing the resource characteristics of responsible engineering facilities, taking into account the peculiarities of operational loading conditions, is discussed. The processes of degradation of the initial strength properties of structural materials (metals and their alloys) under combined fatigue and long-term strength mechanisms are considered.

A mathematical model describing the processes of cyclic viscoplastic deformation and accumulation of fatigue damage in structural alloys under multiaxial disproportionate modes of combined thermomechanical loading has been developed from the modern positions of mechanics of the damaged medium and fracture mechanics. The model consists of three interrelated components: relations determining the cyclic viscoplastic behavior of the material, taking into account the dependence on the destruction process; evolutionary equations describing the kinetics of the damage accumulation process; criteria for the strength of the damaged material.

The variant of the cyclic determining relations is based on the idea of the existence of plasticity and creep surfaces in the stress space and the principle of gradiency of the velocity vectors of plastic deformations and creep deformations to the corresponding surface at the loading point. These equations of state reflect the main effects of the process of cyclic viscoplastic deformation of the material for arbitrary complex loading trajectories.

The variant of kinetic equations of damage accumulation is based on introduction of a scalar damage parameter and on energy principles. Ittakes into account the main effects of formation, growth and fusion of microdefects under arbitrary complex modes of combined thermomechanical loading. A joint form of the evolutionary equation of damage accumulation in the areas of low-cycle fatigue and long term strength is proposed.

As a criterion of the strength of the damaged material, the condition of reaching the critical value of the damage value is used.

The results of numerical modeling of deformation processes and damage accumulation in structural alloys with degradation mechanisms combining fatigue and long-term strength of the material are presented. The results of the comparison of calculated and experimental data showed that the proposed model of the mechanics of the damaged medium qualitatively and with the accuracy necessary for practical calculations quantitatively describes the processes of destruction of hazardous areas of structural elements under the combined actions of degradation mechanisms of fatigue and long-term strength.
Improved YOLOv3 detection method for PCB plug-in solder joint defects based on ordered probability density weighting and attention mechanism
Authors: Wang Zheng , Chen Wenbin , Li Taifu , Zhang Shaolin , Xiong Rui
Published: July 2022

Printed Circuit Board (PCB) is the heart component of electronic products, and its defect detection is the basic requirement of PCB quality control in the production process. Traditional visual detection methods need artificial design features, so their detection accuracy is poor, and the rate of missed and false detection is high. To solve the above problems, this paper proposes an improved YOLOv3 (You Only Look Once) detection method for PCB plug-in solder spot defects based on the combination of the ordered probability density weighting and the attention mechanism. First, in order to obtain a higher priority priori box, the ordered probability density weighting (OWA) method is used to optimize the multiple sets of a priori boxes generated by K-means. Then, to get more effective feature information, the Squeeze-and-Excitation mechanism (SE) is added to the backbone network. In the feature detection network, the Convolutional Block Attention Module (CBAM) attention mechanism is joined, at the same time in the inspection network output layer three layer feature are fusions. Finally, in order to accelerate the convergence speed of model and improve the accuracy of the model, the network loss function was improved by using the generalized joint generalized intersection over union (GIoU), and the COCO data model was applied to PCB solder spot defect training by transfer learning method. After testing, the average detection accuracy of improved network is improved from 84.35% to 96.69%, and the improved network has better convergence than the original network. The study shows that the improved method based on YOLOv3 is more suitable for industrial application of PCB plug-in solder spot defect detection.
Periodic unfolding for anisotropically bounded sequences
Authors: Falconi Riccardo , Griso Georges , Orlik Julia
Published: July 2022

This paper is focused on the asymptotic behavior of sequences of functions, whose partial derivatives estimates in one or more directions are highly contrasted with respect to the periodic parameter ε. In particular, a direct application for the homogenization of a homogeneous Dirichlet problem defined on an anisotropic structure is presented. In general, the obtained results can be applied to thin structures where the behavior is different according to the observed direction.
The impact of ICT characteristics on students’ learning outcomes during COVID-19 lockdown period: The crucial role of techno eustress perception
Authors: Shirish Anuragini , Verstraete Nina , Tantan Olfa Chourabi
Published: July 2022

BACKGROUND: The COVID-19 crisis led to an unprecedented acceleration of digital learning. It pushed many institutions to abruptly switch to fully online learning modes from face-to-face learning. Prior studies show that higher IT demands can cause challenge or hindrance stressors, depending on how the digital technology characteristics are perceived by the end-user. However, there is a gap in our knowledge regarding how ICT characteristics can lead to positive stress appraisals in a remote learning environment. OBJECTIVE: This paper leverages the person-environment fit and technostress literature to examine how usefulness and reliability as demand-ability stressors of ICT tools can positively impact learning outcomes among remote learning students. Techno eustress perceptions are evaluated as a crucial mechanism for theorizing the positive impact. METHODS: We used the survey method, sampling students (N = 82) during the lockdown period to test this model. RESULTS: Our findings highlight the ICT characteristic of usefulness as salient in contributing to student learning outcomes as it promotes techno eustress. CONCLUSIONS: This is the first study to demonstrate a positive impact of ICT characteristics on student learning outcomes via techno eustress perceptions.
OTKI-F: An efficient memory-secure multi-keyword fuzzy search protocol
Authors: Han Ziyang , Ye Qingqing , Hu Haibo
Published: July 2022

Many breakthroughs on security and privacy-preserving techniques have emerged to mitigate the trust loss of cloud hosting environment caused by various types of attacks. To enhance memory-level security of multi-keyword fuzzy search, a widely occurred query request, we take the initiative to apply Trusted Execution Environment (a.k.a TEE) technology to our protocol design which provides hardware-based tamper-proof enclaves. Then we propose the Edit Distance-based Obfuscation Mechanism to further protect the query process executed outside TEE against access pattern leakage. With concerns of practicality and performance, we also propose the two-layer fuzzy index structure and Trend-aware Cache. The former addresses the space limitation of TEE memory for searching large datasets, while the latter optimizes the cache utility of TEE with trend-aware coordinator to effectively reduce the communication overhead.
An improved intelligent technique for maximum power point tracking under partial shading conditions of photo voltaic system
Authors: Ponmalar S. Joshibha , Prasad Valsalal , Kannadasan Raju
Published: July 2022

A novel technique is presented for Maximum Power Point Tracking (MPPT) based photovoltaic (PV) system in partial shadow conditions for harvesting maximum power. In this paper, a hybrid technique is developed, which combines Black Widow Optimization (BWO) with Recurrent Neural Network (RNN). To train the data set and provide a control signal for the converter, an RNN is used. After fitting the training data sets, the suggested method achieved maximum power by utilizing BWO based on the control parameters. This proposed method minimizes the difference between actual and average power. Using an optimization technique, the main goal of this proposed strategy is to obtain peak power harvest under various conditions, including partial shading, while minimizing error function, With the help of MATLAB/Simulink software, the conclusions are revealed under various partial shading conditions. For each category, the observed results are evaluated at various time intervals. The proposed method is also compared to other techniques such as the Ant Colony Optimization (ACO)-RNN system, Particle Swarm Optimization (PSO)-RNN system, and Gravitational Search Algorithm (GSA)-RNN system. The proposed system is 36.11% faster than GSA with RNN, 39.47% faster than PSO, and 42.5% faster than ACO with RNN in terms of tracking speed. Significantly, the proposed work is 0.87% more efficient than the other models in terms of obtaining maximum power. In terms of obtaining maximum power, the proposed work BWOA-RNN is more effective than other methods.
Modeling the pile settlement using the Integrated Radial Basis Function (RBF) neural network by Novel Optimization algorithms: HRBF-AOA and HRBF-BBO
Authors: Zhang Ming , Du Qian , Yang Jianxun , Liu Song
Published: July 2022

The Pile movement is one of the most crucial matters in designing piles and foundations that need to be estimated for any project failure. Over the variables used in forecasting Pile Settlement, many methods have been introduced to appraise it. However, existing a wide range of theoretical strategies to investigate the pile subsidence, the soil-pile interactions are still ambiguous for academic researchers. Most studies have tried to work out the subsidence rate in piles after loading passing time by artificial intelligence methods. Generally, the Artificial Neural Network (ANN) has drawn attention to show the actual views of pile settlement over the loading phase vertically. This research aims to present the Hybrid Radial Basis Function neural network integrated with the Novel Arithmetic Optimization Algorithm and Biogeography-Based Optimization to calculate the optimal number of neurons embedded in hidden layers. The transportation network of Klang Valley, Mass Rapid Transit in Kuala Lumpur, Malaysia, was chosen to analyze the piles’ settlement and earth features using HRBF-AOA and HRBF-BBO scenarios. Over the prediction process, the R-values of HRBF-AOA and HRBF-BBO were obtained at 0.9825 and 0.9724, respectively. The MAE also shows a similar trend as 0.2837 and 0.323, respectively.
RETRACTED: A computational model for medical image retrieval using orthogonal moment
Authors: Nallasivan G. , Akshaya V.S. , Padmavathy C.
Published: July 2022

This article has been retracted. A retraction notice can be found at https://doi.org/10.3233/JIFS-219433.
Impact of a 12-week Strength Training Program on Fatigue, Daytime Sleepiness, and Apathy in Men with Myotonic Dystrophy Type 1
Authors: Gallais Benjamin , Roussel Marie-Pier , Laberge Luc , Hébert Luc J. , Duchesne Elise
Published: July 2022

Background:

Myotonic dystrophy type 1 (DM1) is a multisystemic neuromuscular disorder causing a plea of impairments, of which fatigue and apathy are some of the most frequent non-muscular symptoms. No curative treatment exists to date, and patients only have access to limited effective care, which are intended to decrease the burden of specific symptoms in daily life.

Objective:

This study aimed to assess whether a 12-week strength training program has an impact on fatigue/daytime sleepiness, apathy, and disease bruden in men with DM1.

Methods:

Eleven participants completed the Fatigue and Daytime Sleepiness Scale (FDSS) and the Myotonic Dystrophy Health Index (MDHI) at baseline, at 6 and 12 weeks, and at 6 and 9 months. Also, the Apathy Evaluation Scale (AES) was filled out at baseline, at 12 weeks, and at 6 and 9 months.

Results:

Results show significant effects of the training program both on apathy and fatigue/daytime sleepiness, effects that are respectively greater at three and six months after the end of the program than at its very end. However, no difference was observed regarding the overall disease burden.

Conclusion:

These findings are promising for patients with DM1 considering that few non-pharmacological treatments are available.
A Critical Analysis of Intestinal Enteric Neuron Loss and Constipation in Parkinson’s Disease
Authors: O’Day Chelsea , Finkelstein David Isaac , Diwakarla Shanti , McQuade Rachel Mai
Published: July 2022

Constipation afflicts many patients with Parkinson’s disease (PD) and significantly impacts on patient quality of life. PD-related constipation is caused by intestinal dysfunction, but the etiology of this dysfunction in patients is unknown. One possible cause is neuron loss within the enteric nervous system (ENS) of the intestine. This review aims to 1) Critically evaluate the evidence for and against intestinal enteric neuron loss in PD patients, 2) Justify why PD-related constipation must be objectively measured, 3) Explore the potential link between loss of enteric neurons in the intestine and constipation in PD, 4) Provide potential explanations for disparities in the literature, and 5) Outline data and study design considerations to improve future research. Before the connection between intestinal enteric neuron loss and PD-related constipation can be confidently described, future research must use sufficiently large samples representative of the patient population (majority diagnosed with idiopathic PD for at least 5 years), implement a consistent neuronal quantification method and study design, including standardized patient recruitment criteria, objectively quantify intestinal dysfunctions, publish with a high degree of data transparency and account for potential PD heterogeneity. Further investigation into other potential influencers of PD-related constipation is also required, including changes in the function, connectivity, mitochondria and/or α-synuclein proteins of enteric neurons and their extrinsic innervation. The connection between enteric neuron loss and other PD-related gastrointestinal (GI) issues, including gastroparesis and dysphagia, as well as changes in nutrient absorption and the microbiome, should be explored in future research.
Functional network characteristics based on EEG of patients in acute ischemic stroke: A pilot study
Authors: Xin Xiyan , Duan Fang , Kranz Georg S. , Shu Dong , Fan Ruiwen , Gao Ying , Yan Zheng , Chang Jingling
Published: July 2022

BACKGROUND: Ischemic stroke is a common type of stroke associated with reorganization of functional network of the brain. OBJECTIVE: This pilot study aimed to investigate the characteristics of functional brain networks based on EEG in patients with acute ischemic stroke. METHODS: Seven patients with ischemic stroke within 72 hours of onset and seven healthy controls were enrolled in the study. Dynamic EEG monitoring and clinical information were repeatedly collected within 72 hours (T1), on the 5th day (T2), and on the 7th day (T3) of stroke onset. A directed transfer function was employed to construct functional brain connection patterns. Graph theoretical analysis was performed to evaluate the characteristics of functional brain networks. RESULTS: First, we found that the brain networks of ischemic stroke patients were quite different from the healthy controls. The clustering coefficient (0.001 < Threshold < 0.2) in Delta, Theta, and Alpha bands for the patients were significantly lower (P < 0.01) and the shortest path length in all bands (0.001 < Threshold < 0.2) for the patients were significantly longer (P < 0.01). Moreover, the peaks of the shortest path length for the patients seemed to be higher in all bands with larger thresholds. Secondly, the brain networks for the patients showed a characterized time-variation pattern. The clustering coefficient (0.001 < Threshold < 0.2) of T1 was higher than that of T2 in alpha band (P < 0.01). The shortest path length (0.001 < Threshold < 0.2) of T3 was shorter than that of T2 (P < 0.01) in all bands, and the peak of T3 was numerically higher than that of T2 in all bands with narrower thresholds. CONCLUSION: Functional brain networks in patients with acute ischemic stroke showed impaired global functional integration and decreased efficiency of information transmission compared with healthy subjects. The shortening of the shortest path length during the recovery indicates neural plasticity and reorganization.
Quantum Entanglement Nature of Relativity of Angular Momentum and Inertia of Rotating Bodies
Authors: Lagutin Boris
Published: July 2022

In this experimental paper (preprint), the author analyzes how relativity of angular momentum and of inertia of rotating bodies may work physically (not mathematically). For example, all bodies, including astronauts, inside the International Space Station, have colossal moments of Inertia and colossal angular momentums which are physical properties of rotating bodies. These physical properties both depend on radii of rotation. All orbital trajectories have very large radii of rotation. However, the astronauts can easily move any bodies inside the International Space Station despite their colossal angular momentums and colossal moments of Inertia. The astronauts' capability to overcome the colossal inertial resistance of the bodies in the International Space Station is explained by relativity of angular momentum and of moment of Inertia. The relativity of the momentum and of the inertia of the bodies inside the International Space Station is just a statement. However, it is unclear how such relativity may work physically. Namely, it is not explained what exactly physically happens with the astronauts' bodies and other bodies so that the astronauts can easily move themselves and other bodies inside the International Space Station. An experiment described in this paper is aimed to understand what happens with not only astronauts' bodies but also other bodies which rotate relatively to each other. Notice that making mathematical manipulations like canceling out variables, for example a variable symbolizing a rotational radius, in physical equations does not remove such physical properties as angular momentum and moment of Inertia.
Sobre afecTAR: del campo a la escritura como laboratorio
Authors: Tsallis Alexandra , Oliveira Moraes Marcia , Balbino Beatriz , Aires Jackeline , Juliana Bravo Juliana , Vianna Keyth , Ribeiro Larisse , Lorena Loíse , Brito Monique , Teodoro Rebecca , Azevedo Sonalle , Bredariol Tereza
Published: July 2022

En este ensayo presentamos la propuesta de trabajo desarrollada en el laboratorio afecTAR -grupo de investigación vinculado a la Universidad Estatal de Río de Janeiro (UERJ) - que se desarrolla en diferentes escenarios sociales. Utilizamos la Teoría Actor-Network Theory (ANT) de Bruno Latour, la discusión propuesta por Jorge Bondía sobre la experiencia y la noción de afectación, desarrollada por Jeanne Favret Saada para apoyar nuestra metodología de investigación. Argumentamos que la producción de conocimiento científico basado en la experiencia de afectación forja la posibilidad de una investigación encarnada y situada, que se mueve a partir de lo vivido. Esta vez, nos comprometemos a trabajar con una política de redacción capaz de hacer que el campo se desborde, afectando a quienes lo leen, así como también las personas que estuvieron con él en la reunión de investigación, siguiendo sus pistas y guiándose por las preguntas producidas por la propia investigación.
Integration of basic and additional information technology education based on the training of students in digital education centers for kids
Authors: Grigoriev S. G. , Vostroknutov I. E. , Rodionov M. A. , Akimova I. V. , Vorobev M. M.
Published: July 2022

Today, the problem of integrating basic and additional information technology education is relevant. Integration is of particular importance for school informatics, which is significantly influenced by digitalization of modern society. Some areas of digitalization can be highlighted in particular: the expansion of the network of additional education institutions equipped with modern digital equipment for teaching children how to work with it; providing conditions for mastering new digital professions; developing basic digital competencies, etc. Modern school informatics has a number of shortcomings, which determines the need to reform content of the discipline and forms of content presentation. Such a reform involves a targeted integration of basic and additional information technology education, which allows to significantly enrich its educational and developmental potential. At the same time, the following conditions must be taken into account: providing access to modern equipment and technologies; continuity and consistency in the construction of programs and methods of basic and additional education; implementation of convergent solutions within the content and methodological support of school disciplines; symbiosis of technologies and programs of these disciplines.

One of the ways for integrating basic and additional school education is the development of methodological support for programs of basic and additional education for “IT cube” kid’s digital education centers, “Point of Growth” education centers, “Quantorium” kid’s technoparks on the basis of educational organizations. In accordance with the project ideology, the educational areas (“Python programming”, “Mobile development”, “VR/AR development”, “Robot programming”, “System administration”, “Cyber hygiene and Big Data”, “Fundamentals of programming in Java”, “Fundamentals of algorithmics and logic”, etc.) were focused on supporting the most relevant and wanted competencies of kids in IT sphere, providing the possibility of integrated solutions both within the framework of the actual information technology education, and outside this framework.
REU program as a student-centered, project-based environment for teaching math in California State University
Authors: Fomin S. A.
Published: July 2022

Starting from 2004, within the last years California State University at Chico (CSUC) hosted the National Science Foundation (NSF) funded Research Experiences for Undergraduates and Teachers (REUT) program in Mathematics. The program targets secondary teachers with a strong interest in mathematics or math education (RET) and students who have completed their junior year with coursework appropriate to the research project (REU). The program is designed to engage participants in research problems with a high potential for publication and to create a research experience that broadens participants’ perspective both of mathematics as a discipline and of research (whether mathematical or not) as an exciting exploratory process. During this period the large group of undergraduate students from different US universities and high school math teachers were involved in numerous research projects in pure and applied math, in math education and statistics. Working on the research projects the participants acquire the fundamental mathematical concepts and also studied how to apply modern IT technologies and computational systems for solving various math problems. We provide a research experience that enhances the skills necessary for careers in any of the sciences, while adding both depth and breadth to the participant’s mathematical knowledge, skill, and understanding. The depth comes primarily from participation in a research team working on a potentially publishable research problem, while breadth is added by activities that integrate all research teams, by in-service teacher/undergraduate interactions, and by synergistic activities such as weekly research talks. Mathematical activities are supplemented with social activities conducive to creating a productive and comfortable research environment.