Real Force Research Articles

The Mysticism of History and the Transcendent Vision of the Great Patriotic War

This article examines the evolution of “mystical discourse” in the literature on the Great Patriotic War from 1941 to 2008. It analyses the content of ideas about the participation of supernatural principles in people’s relations and in the fate of peoples in different historical conditions. The author reveals the gnoseological potential and socio-cultural mission of irrational knowledge that claims to be the universal truth. The “transcendent vision” formula integrates a variety of manifestations – from intuitions to metaphysical concepts. The analysis is done with reference to poetry by K. Simonov, A. Akhmatova, A. Tvardovsky, N. Glazkov, Yu. Kuznetsov, the poem Leningrad Apocalypse by D. Andreev, Mother’s Dreams by V. Shukshin, God and the Soldier by V. Pietsukh, Live and Remember by V. Rasputin, Psalm by F. Gorenstein, Cursed and Killed by V. Astafyev, and Tankman or ‘White Tiger’ by I. Boyashov. The author’s reflections on the transcendent is realised in three modes: discovery, mystical propensities, and philosophising. The discovery of the presence of the mystical principle as a real and beneficial force is characteristic of wartime lyrics. Vital intuition actualises the archetypal resource of national culture: ancestral memory, the voice of the Earth, nature, the patronage of ancestors, and the sacred power of the Russian word. Awareness of the special protective mission of love is based on the deep ethics of folk tradition and corresponds to the ideas of religious philosophy about the participation of the Wisdom of God in human relations. The effectiveness of both is confirmed by prophetic dreams and actions of the heroines in the works by V. Shukshin and V. Rasputin. Theodicy became the central problem in the post-war feeling of a disastrous social experience. A visionary poem by D. Andreev and ballads by Yu. Kuznetsov are versions of poetic gnosis: they interpret the war as an episode of the eternal conflict of darkness and light, the confrontation of demons with great power, in which an ordinary person is assigned the role of a victim and the poet – the mission of the “messenger”, the painter of these forces. The reasoner-toned concepts of F. Gorenstein and V. Astafyev regard war as a last judgment on peoples, the payment for the fall from God’s grace. I. Boyashov’s novel reveals the Manichaean idea of the dual role of evil: the power of darkness can only be crushed by hatred. Experiencing the ontological power of transcendent knowledge and its suggestions, the artist feels involved in the mystical origin.

АНАЛІЗ НАПРУЖЕНО-ДЕФОРМОВАНОГО СТАНУ ФІТИНГОВОГО СТИКУ ПАНЕЛЕЙ ВІД'ЄМНОЇ ЧАСТИНИ КРИЛА ТА ЦЕНТРОПЛАНА ТРАНСПОРТНОГО ЛІТАКА

Fitting joints are widely used in aircraft structures, and they are responsible for the interconnection of important components. The stress-strain state analysis of the fitting joint must be carried out before the performance analysis of the fitting joint. With the help of 3D modeling software (CATIA) and finite element analysis software (ANSYS), the stress-strain state of each component in the fitting joint of outer wing section was calculated in this paper. In the CATIA, the solid model is simplified and segmented according to the size of the cross section and the height of the center of gravity of the model. In the ANSYS, the beam elements are used to replace the simplified segmented model to obtain the internal force distribution of the solid model and to determine the magnitude and change law of the stress applied to the end of the solid model. When calculating the force transmitted by the fastener, the pre-tightening force of the bolt and the interaction between the surfaces of the component are taken into account, so as to simulate the real force situation well. Therefore, it is a very feasible method to use the CATIA and ANSYS to obtain the stress-strain state of components in the fitting joint of center wing section and outer wing section.The results show that under the working conditions of the fitting joint (130Mpa), the fitting of outer wing section with center section has a maximum stress of 245.79Mpa and a maximum strain of 0.0035, the stringer of outer wing section has a maximum stress of 293.17Mpa and a maximum strain of 0.0047, the lower panel of outer wing section has a maximum stress of 289.53Mpa and a maximum strain of 0.0042. The connecting bolts (M8 and M6) have a maximum stress of 686.81Mpa and a maximum strain of 0.0063, which meets the design requirements. In addition, according to the analysis results of the stress-strain state of the fitting joint of outer wing section, the force distribution of the bolts in the fitting joint of outer wing section with center section was obtained in this paper. It has been confirmed that due to the different positions and force areas of the bolts, the force distribution between rows of bolts is uneven, and the first row of bolts has a more force.

АНАЛИЗ СОВРЕМЕННОГО СОСТОЯНИЯ МАЛОГО И СРЕДНЕГО ПРЕДПРИНИМАТЕЛЬСТВА В РЕСПУБЛИКЕ КАЗАХСТАН

This article has the aim to explore the policy of supporting of small and medium-sized businesses. Over the years, the independent states have managed the problems of the economy. The contribution of small businesses to the economy, the replenishment of revenue items in budgets of the different levels, and the creation of new jobs have become one of the decisive factors of the development in the states. Small and medium-sized businesses significantly contribute to the formation of the competitive environment and the establishment of market balance. Currently, small and medium-sized businesses represent fairly powerful social stratum of the society, real and serious economic force. At the present stage, the relationship between business and government has acquired the special role, improving the technology of their interaction; the problem of self-organization of the business community is relevant today as it was only few years ago. Small and medium-sized enterprises (SMEs) are the fundamental link that determines the state level of development in order to ensure sustainable economic growth. This sector of the economy has huge potential for solving many problems of the economic growth of the state, such as undeveloped competition, inefficient use of material and non-material resources, dependence of the domestic demand on imports, unemployment, poverty, etc. Issues of SMEs development in the Republic of Kazakhstan are among the most important and highest state level.

Piecewise linear deformation characteristics and a contact model for elastic-plastic indentation considering indenter elasticity

The elastic deformation on indenter is inevitable and has significant influences on indentation measurements. From a systematic finite element analysis for the indentation of elastic-perfectly plastic half-space by elastic spherical indenter, the piecewise linear characteristics of post-yield deformation are observed. Linear contact constitutive equations depending on elastic deformation of the indenter are derived by curve-fitting approach. An explicit theoretical contact model is presented to predict real contact radius, contact force and deformations of both contacting bodies ranging from elastic to finite plastic deformations. The applicability of the model is verified numerically and experimentally by static indentations and low-to-moderate velocity impacts.

Improving the Downwind Sail Design Process by Means of a Novel FSI Approach

The process of designing a sail can be a challenging task because of the difficulties in predicting the real aerodynamic performance. This is especially true in the case of downwind sails, where the evaluation of the real shapes and aerodynamic forces can be very complex because of turbulent and detached flows and the high-deformable behavior of structures. Of course, numerical methods are very useful and reliable tools to investigate sail performances, and their use, also as a result of the exponential growth of computational resources at a very low cost, is spreading more and more, even in not highly competitive fields. This paper presents a new methodology to support sail designers in evaluating and optimizing downwind sail performance and manufacturing. A new weakly coupled fluid–structure interaction (FSI) procedure has been developed to study downwind sails. The proposed method is parametric and automated and allows for investigating multiple kinds of sails under different sailing conditions. The study of a gennaker of a small sailing yacht is presented as a case study. Based on the numerical results obtained, an analytical formulation for calculating the sail corner loads has been also proposed. The novel proposed methodology could represent a promising approach to allow for the widespread and effective use of numerical methods in the design and manufacturing of yacht sails.

How the gene-editing in medicine and public health practice could stand the test of bioethics

In recent years, gene editing is increasingly used as one of the technical means to solve public health problems. The great progress made in the field of life science and gene-editing technology has made it possible for humans to control and alter human physiological characteristics through gene-editing technology and created a broad application prospect for this technology. However, gene-editing technology has faced with many significant ethical risks, and human gene editing experiments have been banned for a long time in the past. Realistic technological breakthroughs and the emergence of real cases force the ethics circle to re-examine this issue. Through the analysis and trade-off of the potential benefits and ethical risks of human gene-editing technology, it can be found that different applications of human gene editing for different purposes are considered to have different acceptability. Among them, human gene editing for medical purposes has no fundamental moral barriers, human gene editing for purposes of enhancement cannot be allowed by ethics and reality in the current social environment, and human gene editing for purposes of transformation fundamentally violates ethical norms. Therefore, gene editing can be allowed if it is only used to solve human medical and public health problems.

A Deep Learning Method for Vision Based Force Prediction of a Soft Fin Ray Gripper Using Simulation Data.

Soft robotic grippers are increasingly desired in applications that involve grasping of complex and deformable objects. However, their flexible nature and non-linear dynamics makes the modelling and control difficult. Numerical techniques such as Finite Element Analysis (FEA) present an accurate way of modelling complex deformations. However, FEA approaches are computationally expensive and consequently challenging to employ for real-time control tasks. Existing analytical techniques simplify the modelling by approximating the deformed gripper geometry. Although this approach is less computationally demanding, it is limited in design scope and can lead to larger estimation errors. In this paper, we present a learning based framework that is able to predict contact forces as well as stress distribution from soft Fin Ray Effect (FRE) finger images in real-time. These images are used to learn internal representations for deformations using a deep neural encoder, which are further decoded to contact forces and stress maps using separate branches. The entire network is jointly learned in an end-to-end fashion. In order to address the challenge of having sufficient labelled data for training, we employ FEA to generate simulated images to supervise our framework. This leads to an accurate prediction, faster inference and availability of large and diverse data for better generalisability. Furthermore, our approach is able to predict a detailed stress distribution that can guide grasp planning, which would be particularly useful for delicate objects. Our proposed approach is validated by comparing the predicted contact forces to the computed ground-truth forces from FEA as well as real force sensor. We rigorously evaluate the performance of our approach under variations in contact point, object material, object shape, viewing angle, and level of occlusion.

Численное моделирование распространения акустического сигнала в подводном звуковом канале

Object and purpose of research. The progress in numerical simulation methods significantly widens the capabilities of theoretical analysis in the tasks requiring extensive calculations and input data sets, like sound propagation at sea. This paper discusses the feasibility of a numerical model describing the physics of acoustic signal propagation in a deep-water channel. Materials and methods. Acoustic signal calculation is performed as per the ray-path theory with a numerical model taking into account depth-wise variations of sound velocity and seabed parameters. Main results. It was shown that depending on the vertical distribution of sound speed, the source depth and distance, the acoustic wave propagation direction can change over significant range of angles the in vertical plane. In this regard it is advisable to calculate the real target force of an object of complex geometry not only from heading angle in horizontal plane but also in terms of the possible range of angles in the vertical plane. Conclusion. Model-analyzed angles range of long-range wave propagation may be used for change estimation of object target force characteristics. Practical significance of the study lies in improving the methods of calculation of the real target force of complex shape objects in terms of state-of the art capabilities of simulating the propagation of acoustic signals conditions in the ocean.

REAL LIFE DESCRIPTION IN CH REAL LIFE DESCRIPTION IN CHARACTERISING STUDEN TERISING STUDENTS’ PERSONAGE AND STUDENTS’ PERIOD IN THE WORLD LITERATURE

Introduction. The students have repeatedly acted as a real political force, participated in solving important social problems. It is obvious that university youth, who sometimes leave a significant mark in history, should become the object of comprehension in the works of literature. Real life is a phrase used originally in literature to distinguish between the real world and fictional or idealized worlds, and in acting to distinguish between performers and the characters they portray. The comparative study of the works of world figures analyzed in the article will have a positive impact on the development of our international literature and will promote the reading literary books and reading culture. Research methods. The role, genesis, national nature, poetic-typological features and the portrait of students, their character’s features, similarities and differences and students’ personages as an object of real life descriptions in the works of world literary writers are analyzed. Results and discussions.

Haptic Manipulation of 3D Scans for Geometric Feature Enhancement.

Localisation of geometric features like holes, edges, slots, etc. is vital to robotic planning in industrial automation settings. Low-cost 3D scanners are crucial in terms of improving accessibility, but pose a practical challenge to feature localisation because of poorer resolution and consequently affect robotic planning. In this work, we address the possibility of enhancing the quality of a 3D scan by a manual ’touch-up’ of task-relevant features, to ensure their automatic detection prior to automation. We propose a framework whereby the operator (i) has access to both the actual work-piece and its 3D scan; (ii) evaluates the missing salient features from the scan; (iii) uses a haptic stylus to physically interact with the actual work-piece, around such specific features; (iv) interactively updates the scan using the position and force information from the haptic stylus. The contribution of this work is the use of haptic mismatch for geometric update. Specifically, the geometry from the 3D scan is used to predict haptic feedback at a point on the work-piece surface. The haptic mismatch is derived as a measure of error between this prediction and the real interaction forces from physical contact at that point on the work-piece. The geometric update is driven until the haptic mismatch is minimised. Convergence of the proposed algorithm is first numerically verified on an analytical surface with simulated physical interaction. Error analysis of the surface position and orientations were also plotted. Experiments were conducted using a motion capture system providing sub-mm accuracy in position and a 6 axis F/T sensor. Missing features are successfully detected after the update of the scan using the proposed method in an experiment.

Image-Based Force Estimation in Medical Applications: A Review

Minimally invasive robotic interventions have highlighted the need to develop efficient techniques to measure forces applied to the soft tissues. Since the last decade, many scholars have focused on micro-scale and macro-scale robotic manipulations. Early articles used the model of soft tissue mathematically and tracked the displacement of the contour of the object in the vision system to provide the corresponding force to the user. Lack of knowledge of different materials and the computational complexity led to a transition from model-based to learning-based approaches to interpret the relation between object deformations, extracted from the vision system, and the real forces applied to the object. The dramatic growth of machine learning techniques and its integration with computer vision has brought novel learning-based visual data processing methods to the area. The application of the image-based force estimation methods in a controlled medical intervention has also received significant attention in the last five years. A decent number of surveys have been published on micromanipulation in recent years, especially for cell microinjection. However, the state of the art in meso- and macro-scale medical robotic interventions has not been reviewed. The aim and contribution of this paper are to fill the stated gap by reviewing the recent advances in image-based force estimation in robotic interventions. The survey shows that learning-based force estimation methods are growing significantly by using deep learning-based methods. The survey will encourage researchers and surgeons to apply learning-based algorithms to real-time medical and health-related operations.

Mechanism design and simulation analysis of robot system for vascular interventional surgery

At present, the mortality of cardiovascular and cerebrovascular diseases is getting higher and higher, interventional surgery has obvious advantages over traditional surgery, and robot technology has also entered this field. Combined with the existing research results, a set of surgical robot system is designed. The operating device uses magnetic powder brake to provide real force feedback of braking torque, the propulsion device adopts a clamping rod structure to accurately clamp the catheter or guide wire, and the force signal is collected by using the lever principle. Finally, the study of the dynamic characteristics of the propulsion device shows that the smaller the quality and the higher the tension force are, the more favorable the performance of the propulsion device is, and the calculation verifies the rationality of the transmission part of the propulsion device.

Dynamic and Analysis of A Geo-Polymer Concrete Structure

The standard portland cement (OPC) was traditionally used as the binding agent in concrete. However it is also important to find alternative emissions-free concrete binding agents to reduce environmental damage caused by cement manufacturing. Geopolymers, also known as inorganic polymers, use byproducts like fly ash rather than cement. Recent studies have shown that geopolymer concrete based on fly ash has enough properties for use. As the geopolymer strength mechanism is different from the OPC binder, an appropriate constituent model for geopolymer concrete must be obtained in order to predict the load-deflection behavior and strength of geopolymer concrete structural components. A number of problems faced with today's cement industry are addressed by geopolymer binders. These binders have similar or better engineering qualities in comparison with cement and can use many types of waste materials.
 This project describes the seismic analysis of buildings with high-rise structures, the model of residential G+10 buildings with traditional concrete and geopolymer concrete properties is modelled and analysis is carried out using the response spectra method considering the position of the building in zone III, this analysis would generate the effect of higher vibration modes and real force distribution in elastic range. Test results include maximum story shifts, maximum story drifts, story shears and story stiffness, and an efficient lateral load resistance system, helping to establish whether geo-polymer concrete can be used in high-rise building construction as dynamic loads are included in the high-rise structures

Dynamic Simulation of Vibration Characteristics and Ride Quality of Superconducting EDS Train Considering Body with Flexibility

A numerical model has been developed to investigate the dynamic characteristics of the Superconducting electrodynamic suspension (EDS) system. Modeling of the guideway with the surface irregularity and the Maglev vehicle are described. Numerical simulations were performed in Simulink to solve the coupled problem. A 3-D model of the electromagnetic system of the superconducting EDS train is established, and the computed real electromagnetic forces are coupled with the maglev train. The EDS train was simulated by using the SIMPACK multi-body dynamic program. The simulation was carried out by using two body models of rigid and flexible bodies. In order to use the modal information to construct the flexible car body, the finite element method and the ABAQUS software were used to construct it together with equivalent elements. The final framework is constructed in MATLAB/Simulink to simulate dynamics and electromagnetic forces together with the constructed simulation framework. In order to consider the interference caused by irregularities, randomness and power spectral density (PSD) are used to analyze vibration interactions. We compared random signal inputs with PSD, greatly enhancing accuracy, and analyzed the vibrational interaction between car body and ride quality.

Longitudinal radiation force of laser pulses and nonlinear optics of moving neutral particles

For a long time, transverse and longitudinal optical forces have been used for non-contact manipulation of small individual particles. The following question arises: What is the impact of these forces on an ensemble of a thousand particles in continuous media? The aim of this work is to find analytical expressions of the radiation force and potential densities arising from a laser pulse propagating in dielectric media. This allows us to find an effective averaged longitudinal real force at the level of the laser pulse spot. The force obtained is proportional to the initial pulse energy and inversely proportional to its time duration. In the femtosecond region, the force becomes strong enough to confine neutral particles into the pulse envelope and translate them with the group velocity in gases. In solids, as silica for example, the longitudinal force of a femtosecond pulse is significantly greater than the molecular forces. Thus, the fine ablation in silica with short pulses may be due to this longitudinal force, which breaks down the molecular bonds. Additionally, after confinement into the pulse envelope, the moving particles produce new linear and nonlinear effects.

Full-phase optimization of PDC bit cutter layout to reduce lateral force based on zoning method

Balancing lateral force is essential to reduce bit vibrations and prolong bit service life. During the process of cutting, the instantaneous cutting situation is governed by the previous blades cutting. This paper introduces a notion called "zoning method" based on the cutting geometry of bit-rock interface, which is dedicated to distinguishing different phases of cutting. Furthermore, a full-phase optimization model is developed to optimize cutter layout for minimizing the lateral force in each cutting phase, the NSGA-II is used to solve for the Pareto-optimal solutions, and the fuzzy comprehensive evaluation method is used to select the optimal solution. Finally, a case study of full-phase optimization of PDC bit cutter layout is conducted to highlight the advantage of the zoning method. The case study results show that the lateral force is reduced significantly in each cutting phase by using zoning method, which can help to achieve the real lateral force balance of PDC bit.

Funding of science: A comparison of approaches and outcomes in Russia and Germany

Russia and Germany use fundamentally different models of science funding. Russian government has inherited planning and distribution system’s principles in this sphere, when the development of the military-industrial complex was an absolute priority. The modern Russian model of R&D financing is also characterized by the predominance of the state research funding and insignificant business participation in R&D investment. The German model of science financing with the predominance of the business sector in the structure of investment in science shows more significant results and contributes more to the transformation of science into a real productive force. These fundamental differences directly affect the export performance of high-tech products (in Germany it is 20 times higher). The comparison of approaches to R&D financing and the results of their application lead to the conclusion that it is necessary to reform the Russian model of financing usage.

Least squares support vector machine method for load identification of nonlinear system

In order to eliminate the dependence of load identification problem on the prior knowledge of current mechanical system, least squares support vector machine was applied to identify the inverse model of nonlinear system, and then based on this inverse model operational responses were adopted to determine real time excitation force. A nonlinear system was applied to conduct the simulation and calculate the steady and unsteady input force in this paper to verify the validity of the proposed method. Simulation results reveal that least squares support vector machine is able to identify reliable inverse model of nonlinear system and then reconstruct accurate real time excitation force. According to the present approach, a small quantity of training samples is needed rather than complete knowledge of the mathematical model and parameters of nonlinear system, so this approach can be extended to engineering application.

Modeling of 3D Surface Morphologies for Predicting the Mechanical Contact Behaviors and Associated Electrical Contact Resistance

The accurate estimation of real contact area plays an important role in predicting the mechanical contact situation and associated electrical contact resistance for engineering rough surfaces. In this work, an improved peak identification method is proposed to reconstruct the rough surface morphologies numerically. A universal calculation process of real contact area and load force under the progressive indentation depth for rough surfaces is developed. Furthermore, a three-dimensional finite element model for analyzing the mechanical contact problem is built and the electromechanical coupling simulation results are compared with that obtained by our novel calculation method. The proposed solution is beneficial for accurate calculation of contact area, which is featured by high aspect ratio in the case of micro-contact. The relationship between electrical contact resistance and load force is also captured in the initial contact process.

Inverse method based on 3D nonlinear physically constrained minimisation in the framework of traction force microscopy.

Traction force microscopy is a methodology that enables to estimate cellular forces from the measurement of the displacement field of an extracellular matrix (ECM)-mimicking hydrogel that a cell is mechanically interacting with. In this paper, a new inverse and physically-consistent methodology is developed and implemented in the context of 3D nonlinear elasticity. The proposed method searches for a displacement field that approximates the measured one, through the imposition of fulfillment of equilibrium with real and known forces acting in the hydrogel. The overall mathematical formulation leads to a constrained optimisation problem that is treated through a Lagrange operator and that is solved numerically by means of a nonlinear finite element framework. In order to illustrate the potential and enhanced accuracy of the proposed inverse method, it is applied to a total of 5 different real cases of cells cultured in a 3D hydrogel that is considered to behave as a nonlinear elastic material. Different error indicators are defined in order to compare ground truth simulated displacements and tractions to the ones recovered by the new inverse as well as by the forward method. Results indicate that the evaluation of displacement gradients leads to errors, in terms of recovered tractions, that are more than three times lower (on average) for the inverse method compared to the forward method. They highlight the enhanced accuracy of the developed methodology and the importance of appropriate inverse methods that impose physical constraints to traction and stress recovery in the context of traction force microscopy.