Reflection Phenomena Research Articles

The Role of Pedagogical Reflexology in Fostering Teacher’s Professional Reflection in Neuropedagogy

<p dir="ltr"><span>The article is the first to address how teachers can evaluate their professional reflection within the neuroscience framework. The authors discuss the potential and conditions for teachers’ self-monitoring, driven by internal personal stimuli. The article aims to offer a preliminary overview of neuropedagogical literature, paving the way for further research. Additionally, it seeks to outline the neurophysiological basis of teachers’ professional reflection and conduct a demonstrative sociological quasi-experiment. This experiment supports the main thesis that reflexivity, reflection, and self-reflection in teachers when driven by intrinsic motivation, can function both as a professional tool and as a subject of transformation in neuropedagogy, while also being measurable and interpretable through neuroscientific approaches. The authors used methods of relevant selection and systematic analysis of scientific sources, along with pedagogical modelling, which involved developing an algorithm to stimulate and sustain natural teacher reflection. They also applied quasi-experimental surveys to assess the presence and level of awareness of three distinct stages of professionally significant reflection among teachers.</span></p><p dir="ltr"><span>The study reveals that many existing theories of reflection within academic discourse fail to enhance the effectiveness of professional teacher reflection adequately. This reflection can become natural and ongoing when grounded in one’s internal emotional stimuli, with minimal external influences. The authors established the importance of distinguishing and measuring the phenomena of reflexivity, professional reflection, and self-reflection, which can be incorporated into the broader neuro-structure of a specialist’s self-regulation. These concepts can also be applied to the theory of pedagogical reflexology. The international significance of the article lies in the potential to apply the self-monitoring model of professional reflection for teachers within the neuropedagogical framework of teacher training programmes. This approach combines the authors’ methodical strategies. Its effectiveness suggests that the model can serve as a framework for fostering professional reflection in current educational contexts.</span></p><div><span><br /></span></div>

Reflection phenomena of plane wave at an initially stressed nonlocal triclinic half-space with stress-free interface

Reflection phenomena of plane wave at an initially stressed nonlocal triclinic half-space with stress-free interface

Reflection and transmission phenomenon of ultrasonic waves in a layered structure of functionally graded porous piezoelectric material

Reflection and transmission phenomenon of ultrasonic waves in a layered structure of functionally graded porous piezoelectric material

Reflection phenomena of thermoelastic plane waves on a rigid surface within a size-dependent elastic media

The current investigation aims to comprehend the spread of time-harmonic thermoelastic plane waves in an isotropic and homogeneous nonlocal elastic material without bounds, within the framework of the Lord–Shulman model and Eringen’s nonlocal stress model. Our analysis reveals two sets of coupled longitudinal waves and one independent shear-type wave. The coupled longitudinal waves experience dispersion and damping over time due to the dissipative nature of the L-S model. In contrast, the vertically shear-type waves exhibit dispersion characteristics due to the presence of nonlocality in the medium. Furthermore, we observe that the shear-type wave encounters a critical frequency, while the coupled longitudinal waves may face critical frequency conditions under certain circumstances. We explore the reflection of thermoelastic waves at a rigid, thermally insulated, and isothermal boundary of a thermoelastic half-space, particularly in the case of an incident coupled longitudinal thermoelastic wave. We determine the amplitude ratios of the reflected waves to the incident wave through analytical methods. For a specific model, we generate various graphs to analyze the behavior of phase speeds, attenuation coefficients, and reflection coefficients. To assess the impact of the elastic nonlocal parameter on the variations of phase speeds, attenuation coefficients, and amplitude ratios of the reflected waves, we present graphical representations. Notably, our observations indicate that all waves are influenced by the nonlocality of the medium. Longitudinal waves exhibit sensitivity to thermal parameters, whereas the shear-type wave remains independent of thermal effects. Furthermore, the presence of elastic nonlocality results in a reduction in the classical shear-type wave speed.

Synthesis and Properties of Highly Tilted Antiferroelectric Liquid Crystalline (R) Enantiomers.

This work reports the synthesis method and various properties of four rod-like antiferroelectric (R) laterally substituted enantiomers, with or without fluorine atoms used as substituents in the benzene ring. The influence of fluorine substitution on the mesophase temperature range was determined. The synthesized compounds are three-ring rod-like smectics with a chiral center based on (R)-(-)-2-octanol. Their chemical and optical purity was checked using high-performance liquid chromatography (HPLC). Two newly synthesized enantiomers and three previously reported (R) enantiomers were used to formulate two antiferroelectric mixtures. The mesomorphic behavior was characterized by polarizing optical microscopy, differential scanning calorimetry, and X-ray diffraction (XRD). The helical pitch and tilt angle measurements were done using the selective light reflection phenomenon and the electro-optical method, respectively. All the enantiomers exhibit a wide temperature range of the antiferroelectric phase, with a high tilt angle. Furthermore, the enantiomer with lateral fluorine substitution in the ortho position has a very long helical pitch (more than 2.0 µm), relatively low enthalpy of melting point, and a tilt angle close to 45 degrees. The designed (R) enantiomers can be useful for formulating eutectic mixtures for further use in various devices, including photonics and optoelectronics.

Analytical study of the reflection and refraction phenomena of plane seismic waves at the interface of orthotropic material sandwiched between two highly anisotropic triclinic media under the initial stresses

Analytical study of the reflection and refraction phenomena of plane seismic waves at the interface of orthotropic material sandwiched between two highly anisotropic triclinic media under the initial stresses

Феномен рефлексии профессионального опыта курсантов образовательных организаций Министерства внутренних дел Российской Федерации на этапах практик

Introduction. The reflexive aspect (associated with the self-awareness of the personality as a developing «I-concept») is a system-forming factor that ensures optimal interaction of all acmeological aspects of human professionalisation: educational, professional and creative2. In this regard, the study of the phenomenon of reflection on the professional experience of students of educational organisations of the Ministry of Internal Affairs of Russia is of particular relevance. This article reveals the essence and significance of reflection at the stages of students’ practice, suggests the introduction of a reflective map of their readiness for practice, and provides recommendations for the development of reflection. Research methods: theoretical (analysis and generalisation of philosophical, theoretical-methodological and psychological-pedagogical research, content analys is of curricula and programs, methodological complexes of practice), empirical (observation, survey, questionnaire, self-assessment method) and statistical methods (qualitative and quantitative analysis of results). The methods of A.V. Karpov and V. V. Ponomareva and the Student’s T-test were used as the main methods. Based on the analysis of the obtained data on the level of reflexivity among students of the 3rd-5th courses of V.Ya. Kikot’ Moscow University of the Ministry of Internal Affairs of Russia and Lukyanov Oryol Law Institute of the Ministry of the Interior of Russia, a low level of reflexivity was revealed in 25.1% of 3rd-year respondents, an average level of reflexivity was revealed in 60.5%, a high level of reflexivity was in 14.4% of respondents. Comparing the dynamics of reflexivity in the example of the 4th and 5th -year students, we can see a natural positive dynamic. In an additional study, the respondents of which were the same 4th -year students, a reflective map of readiness for practical training was proposed. After completing the internship, the students prepared reflective reports, the results were discussed at the subject-methodical section of the department, and appropriate recommendations were given to each of them. In this sample of respondents, the low level of reflexivity has been leveled, in addition, the average and high levels have increased significantly. Results. The introduction of a reflective readiness map for a trainee student and a more thorough reflexive analysis at all stages of practice significantly increase reflexivity indicators and can be proposed for implementation in the practical training of future law enforcement officers.

Fundamentals of Determination of the Biological Tissue Refractive Index by Ellipsoidal Reflector Method

This paper presents the theoretical fundamentals, prerequisites for creation, and peculiarities of modeling a new method for determining the refractive index of biological tissues. The method uses a mirror ellipsoid of revolution as an optical element to ensure total internal reflection phenomena. This paper thoroughly analyzes the differences in the refractive index of healthy and pathological tissues on a biometric diagnostic basis. The analysis is used to model the measurement setup’s parameters. This paper also considers various methods of determining the refractive index of biological tissues based on different principles of physical optics, such as interferometry, refractometry, ellipsometry, and goniophotometry. It systematizes typical optical elements of total internal reflection that can be used in goniophotometry. It justifies the selection of the element base for the goniometric installation based on the ellipsoidal reflector method. A simulation of the installation operation was carried out for various parameters of the ellipsoidal reflector, ensuring the measurement of the biological tissue refractive index from 1.33 to 1.7. This paper also proposes a constructive solution for manufacturing an ellipsoidal reflector of the required configuration.

Wave solutions in nonlocal integral beams

Wave propagation in slender beams is addressed in the framework of nonlocal continuum mechanics. The elastodynamic problem is formulated exploiting consistent methodologies of pure integral, mixture and nonlocal strain gradient elasticity. Relevant wave solutions are analytically provided, with peculiar attention to reflection and near field phenomena occurring in presence of boundaries. Notably, the solution field is got as superimposition of incident, reflected, primary near field and secondary near field waves. The latter contribution represents a further effect due to the size dependent mechanical behaviour. Limit responses for vanishing nonlocal parameter are analytically evaluated, consistently showing a zero amplitude of the secondary near field wave. Parametric analyses are carried out to show how length scale parameter, amplitude of incident wave and geometric and elastic properties of the beam affect the amplitudes of reflected, primary near field and secondary near field waves. The results obtained exploiting different nonlocal integral elasticity approaches are compared and discussed.

Reflection and transmission phenomenon of plane waves at the interface of diffusive viscoelastic porous rotating isotropic medium under hall current and nonlocal thermoelastic porous solid

The response of elastic waves upon encountering the boundary between two elastic media is investigated in the present work. Whereas the top medium is thermoelastic isotropic porous, the below medium is thermoelastic rotating porous diffusive. There is an uncoupled transmitted SV-wave propagating through the medium, and the lower medium is rotating with some fixed angular frequency. When the incident wave hits the boundary, it produces four transmitted waves and five coupled quasi-reflected waves. The system is divided into longitudinal and transverse components using the Helmholtz decomposition theorem. Analytical computations of speed and reflection coefficients for transmitted and reflected waves are performed using LS theory. The outcomes are graphically represented for a particular material subject to nonlocal and fractional-order influences. Wave characteristics, such as speed and reflection coefficients for transmitted and reflected waves, are plotted versus angular frequency and angle of incidence using MATLAB programing. The conservation of energy has also been verified. In the absence of rotation, hall current, voids, viscoelasticity, and diffusion in the medium, the previous results in the literature are obtained.

Rediscovering human capital in the conditions of reflexive modernity

Relevance. The relevance is due to the need to revise approaches to the theoretical understanding of the concepts of «human capital» and «reflexivity» as social phenomena, the need to identify the relationship between these phenomena.The purpose is to show the possibilities of expanding the understanding of the phenomenon of human capital based on the analysis of existing theoretical approaches of various sciences to the concept of «reflexivity».Objectives: to study the peculiarities of understanding the phenomenon of reflection in philosophy, psychology, sociology and to highlight the meaningful characteristics of reflexivity as a component of human capital in modern society.Methodology. The author relies in the study on the possibilities of an interdisciplinary approach to the study of the phenomenon of reflection. The sociological analysis is based on the ideas and principles of systemic, synergetic, sociocultural approaches. The starting point for the analysis of the phenomenon of human capital was the concept of V. S. Golubev.Results. The article substantiates the idea that the transition to a new type of social organization, accompanied by the appearance of new characteristics in the social system, led to the development and strengthening of the importance of reflexivity of society. At the same time, the requirements for the individual are changing and the content of human capital is being revised. This process is conditioned by the need to increase awareness, objectivity of ideas about the system of social relations in conditions of expanding individual freedom, its role in social processes, increasing the volume of information produced by society and the subjects involved in this process.Conclusions. Reflexivity as a characteristic of a social system has appeared relatively recently. The basis of its formation was the evolution of human psychological processes and a qualitative change in the living conditions of society. There is an expansion of the potential of the individual and society, and, on the other hand, the risks that she has to face. The ability to reflect is considered as part of the intellectual and spiritual capital of the individual. It presupposes the activity of the individual in the perception of social processes and events, which was previously the lot of the elite, the development of sophisticated intellectual mechanisms for working with information, analyzing their own and others' experiences.

Investigating laser beam shadowing and powder particle dynamics in directed energy deposition through high-fidelity modelling and high-speed imaging

Laser beam shadowing in directed energy deposition process occurs when in-flight powder particles partially block the laser beam, preventing it from fully reaching the melt pool. This blockage alters the beam's profile, introducing spatio-temporal randomness in heat transfer to the melt pool and affecting its stability. This study utilizes a novel high-fidelity multiphysics model to quantitatively analyze gas-powder stream dynamics and laser-particle interactions. It specifically focuses on dynamic variations in laser beam shadowing, attenuation, and reflection of the laser beam radiant energy, along with powder particles temperature prediction from in-flight heating, accounting for multiple reflection phenomena. Gas-particle dynamics is modeled using a fully coupled CFD-DEM approach, while laser-particle in-flight interactions are predicted using a ray-tracing-based photon discretization method. Modeling predicted that interactions between the laser beam and the in-flight powder stream could result in energy losses up to approximately 70 % due to shadowing and attenuation. The study comprehensively explored the spatio-temporal variations in the attenuated laser beam profile, revealing significant deviations from its initial Gaussian profile and substantial stochasticity and randomness over time. To confirm the modeling results and correlate computational predictions with experimental data, high-speed visible imaging of the powder stream, both with and without the melt pool, along with laser beam attenuation measurements using a photodiode system, were conducted. The model's predictions of particle velocity and laser beam attenuation characteristics aligned with the results from these experiments. Modeling and high-speed imaging demonstrated that in-flight heating caused some particles to melt and few others to reach the vaporization threshold. High-speed imaging further validated these numerical findings by examining the interaction of heated particles with the melt pool across different phases (solid, liquid, and partially vaporized). A significant observation was the increased velocities of partially vaporized particles due to recoil pressure from selective vaporization, which led to the formation of deep craters in the melt pool resulting from high-speed impact.

Изменения в содержании и структуре жизненных проектов учащихся в обучающем рефлексивном диалоге

<p>This article discusses the problem of developing new teaching methods that are based on the use of reflexive technologies. One of the key components of these technologies is systemic reflection as a condition for the realization of personal potential. The paper contains a brief overview of theoretical, methodological and applied developments in the field of studying the phenomenon of reflection in Russian psychological science, which serve as a theoretical basis for the development of reflexology. The main conditions of the organization of reflexive dialogue, the principles of its construction, the necessary structural components and a summary of the author's development - the reflexive training "Life project of the individual" are described. The author's development - refletrening "Life project of personality" contains a description of the basic conditions of its organization, the principles of construction and the necessary structural components. The results of an empirical study of the influence of educational reflexive dialogue on the formation of students' life projects are presented. The use of reflexive practices (reflexive training) in reflexive dialogue for building life projects in adolescents is also justified. It has been empirically established that changes in the structure and content of life projects are noted equally in all subjects, regardless of their personal characteristics, but more likely in students with high scores on such personal characteristics as orientation in time (understanding the existential value of life), creative attitude to life (creativity), autosympathy, contact, systemic reflection", volitional regulation of behavior (control-naturalness), the level of general reflexivity, the appropriation of socially significant roles, the availability of experiences, openness to new experiences and self-assessment of metacognitive activity.</p>

Spin-Weighted Spherical Harmonics for Polarized Light Transport

The objective of polarization rendering is to simulate the interaction of light with materials exhibiting polarization-dependent behavior. However, integrating polarization into rendering is challenging and increases computational costs significantly. The primary difficulty lies in efficiently modeling and computing the complex reflection phenomena associated with polarized light. Specifically, frequency-domain analysis, essential for efficient environment lighting and storage of complex light interactions, is lacking. To efficiently simulate and reproduce polarized light interactions using frequency-domain techniques, we address the challenge of maintaining continuity in polarized light transport represented by Stokes vectors within angular domains. The conventional spherical harmonics method cannot effectively handle continuity and rotation invariance for Stokes vectors. To overcome this, we develop a new method called polarized spherical harmonics (PSH) based on the spin-weighted spherical harmonics theory. Our method provides a rotation-invariant representation of Stokes vector fields. Furthermore, we introduce frequency domain formulations of polarized rendering equations and spherical convolution based on PSH. We first define spherical convolution on Stokes vector fields in the angular domain, and it also provides efficient computation of polarized light transport, nearly on an entry-wise product in the frequency domain. Our frequency domain formulation, including spherical convolution, led to the development of the first real-time polarization rendering technique under polarized environmental illumination, named precomputed polarized radiance transfer, using our polarized spherical harmonics. Results demonstrate that our method can effectively and accurately simulate and reproduce polarized light interactions in complex reflection phenomena, including polarized environmental illumination and soft shadows.

First model of industrial noise propagation in the vicinity of the Yasuní National Park

Abstract This work addresses aspects of industrial noise produced by the facilities of oil extraction near Yasuní National Park, located in the Ecuadorian Amazon region. The acoustic sources within this kind of facilities could influence in the wildlife behavior, which could impact negatively on the species. The acoustic wave radial propagation model in an open field is proposed through a geometric divergence attenuation, atmospheric absorption effect, dispersion effects due to obstacles, and soil effects. The initial model without obstacles makes predictions based on an algorithm considering that the data are associated to a GPS position, the first propagation model without obstacles determines the level of sound pressure for each quasi-horizontal measurement (x, y). Then, dispersion factors are incorporated through the NORD2000 model to consider the local flora that introduces reflection and dispersion phenomena which are in the environment considering geometric measurements estimated in situ. The pressure level of the model without obstacles decreases as the frequency increases, but with less intensity compared to the pressure level of the model with obstacles. As the frequency increases, there are important fluctuations since the attenuating factors influence more than the correction factors.

Application of Riemannian Seismic Ray Path Tracing in Salt Dome Prospecting

Within the geophysical exploration utilising seismic methods, it is well known that if the explored distances are much greater than the wavelength of the seismic waves with which the exploration is carried out, the ray approach of the wave theory can be used. In this way, when the rays travel through an inhomogeneous medium, they follow curved trajectories, which is imperative to determine the geological features that produce reflection and refraction phenomena. In this paper, a simple algorithm for the calculation of the trajectory of a seismic beam through an inhomogeneous stratum is presented. For this, the construction of a pseudo-Riemannian metric is required from the function of P-wave velocities of the geological stratum. Thus, the problem is inverted because instead of finding the curved trajectory of the seismic beam in a background with a Euclidean metric, it is proposed that the beam follows a geodesic of a curved space-time specific to each stratum, becoming a simple and automatic process using the differential geometry apparatus. For the reader to gain insight into this tool, different geological setups from idealised ones up to a salt dome are presented.

Reflection and transmission of ultrasonic waves in a layered structure with a functionally graded porous piezoelectric base

The phenomenon of reflection and transmission of waves offers valuable insights into the internal composition and structural characteristics of materials. This study investigates the reflection and transmission of waves in functionally graded porous piezoelectric materials. These materials, distinguished by their customised electromechanical attributes and gradual property variations, present a promising avenue for optimizing performance across diverse applications, including ultrasonics. The reflection and transmission of ultrasonic waves in a novel structure, consisting of a fluid half-space (FHS) positioned above n porous piezoelectric layers, situated on top of a functionally graded porous piezoelectric half-space (FGPPHS) is studied in this paper. The material properties of FGPPHS are considered to vary along the vertical direction and and resulting equations are solved analytically and numerically. The transfer matrix method is employed to analytically determine the energy ratios and amplitude ratios for reflected and transmitted waves. Numerical computations are performed to study the impacts of frequency, gradation, angle of incidence, and porosity on the energy ratios. Furthermore, the influence of stacking of the number of porous piezoelectric layers above FGPPHS, and the choice of materials (Barium Titanate (BaTiO 3), PZT − 5H, PZT − 7H) in layers and half-space, on the energy ratios are studied. The absolute value of acoustic impedance is plotted for various angles of incidence and porosities. From the graph, it is found that the acoustic impedance can be controlled by adjusting porosity in the structure. This will be helpful in minimizing the energy loss at ceramic-medium interface and improving the mismatch of acoustic impedances at the interfaces of medical ultrasonic imaging devices or underwater sonar detectors, and NDE applications. Further, because of lower acoustic impedance, lower density and stiffness of porous piezoelectric materials, the outcomes of this study will be helpful in designing SAW devices.

Study on the hydraulic effect of Tesla valve structure on the end roadway of abandoned coal mine pumped storage

The use of abandoned mine for pumped storage has garnered significant attention as a novel energy storage technology. The hydraulics of utilizing underground reservoirs constructed in mine roadways represent a key issue for the application of abandoned mines in pumped storage. This study focuses on the practical situation of the Longdong Coal Mine in Jiangsu Province, China. By employing numerical simulation methods, the research investigates the phenomenon of water wave reflection at the end of the roadway in an abandoned mine pumped storage station, as well as the improvement effect of the Tesla valve structure on the reflected water waves. It was found that under the condition of the hydraulic turbine, the reflected wave height at the end of the roadway could reach 1–1.5 times that before reflection. The Tesla valve structure was found to be an effective means of reducing the water level height at the end of the roadway. The average water level was reduced by 0.55 m and 0.35 m under the two flow rates of 1 m/s and 1.4 m/s, respectively. Under the pump condition, the Tesla valve structure has little obstruction to the reverse flow of water. This study has to a certain extent addressed the issue of excessive wave height from water wave reflections at the end of the roadway, thereby enhancing the operational stability of the abandoned mine pumped storage station.

The Significance of Meta-Emotions for Reflecting on Ourselves and Others

Meta-emotions are emotions about emotions, such as, for example, shame about anger. An important subset of meta-emotions constitutes a special case of co-experienced emotions, in which one emotion is directed at another emotion experienced by a subject at the same time. By making us reflectively aware of our own first-order emotions and suggesting an evaluation of them, meta-emotions enable reflection on our own emotional sensibility. In this paper, I explore the roles of meta-emotions in the context of affective empathy. I show that, whereas meta-emotions on the side of the target person increase the complexity of empathy’s success conditions, meta-emotions on the side of the empathiser expand the role of meta-emotions for self-reflection and give rise to parallel phenomena of other-directed reflection. Exploring the roles of meta-emotions in the context of affective empathy allows us to better understand the significance of meta-emotions, as well as the functions of affective empathy.

Numerical modeling of bamboo fences with various infill porosities deployed for mangrove restoration

As part of mangrove restoration initiatives eco-friendly fence has been implemented in eroded coastal areas in recent years. These fences provide the capacity to mitigate incoming wave energy and facilitate sediment deposition, thereby promoting the establishment and maintenance of mangrove habitats. Nevertheless, it is crucial to investigate the influence of the infill porosity on the wave dissipation performance of these fences, as the infill porosity can vary considerably across different restoration projects. The aim of this research is to explore the relationship between the infill porosity and wave dissipation effectiveness to identify more efficient designs for these eco-friendly restoration measures. The experiments involving wave interactions with fence models were conducted in a wave flume measuring 0.8 m in width and 25 m in length. Four wooden fences with distinct infill porosities ranging from 0.60 to 0.90 were strategically positioned to assess wave transmission, reflection, and dissipation phenomena under 18 distinct wave conditions. Additionally, the simulating waves till shore (SWASH)model was employed to calibrate critical bulk drag coefficient parameters and simulate the flow velocity distribution surrounding the fences under the experimental wave conditions. The findings indicated that a fence with a reduced infill porosity exhibits a higher wave transmission coefficient. However, this is accompanied by a higher reflection coefficient and lower wave energy dissipation within the fence. Both the infill porosity and incident wave conditions influence the flow velocity distribution characteristics in the vicinity of the fences. The area where the interaction between waves and fences is the most prominent is concentrated in the upper water layer immediately adjacent to the frontal section of the fences. Understanding the velocity distribution and hydrodynamic characteristics of the fence area aids in better determining the suitable porosity of fill materials for engineering applications.