Connective Elements Research Articles

The Elements of Freedom of Expression in the Light of the European Convention on Human Rights

Abstract Freedom of expression is composed of certain connective elements that are inseparable from each other. If any one of the fundamental elements that by itself has no value and meaning is missing or if it is materially limited, it may negatively impact the whole of freedom of expression. Furthermore, freedom of expression is the foundation of other freedoms. Freedom of expression consists of three components. These components cannot be thought of separately from each other. The initial steps of the first component require the freedom to examine, research, learn and obtain information for an individual to establish an opinion. The second component of freedom of expression is the freedom of opinion, which is the pure thought step where choices with respect to formed, obtained but not yet stated thoughts, opinions and beliefs are established. The basis of this notion relies on an individual being able to be forming an opinion without an enforcement to state it. The third and the final component is the declaration and dissemination of thought and opinion via all means of expression to the world. If an individual’s ability to declare and defend his/her ideas in infringed, it is not possible to talk about the existence of freedom of expression. Consequently, all three of these steps are crucial to maintain the foundation of freedom of expression.

Three-dimensional coupled hydromechanical analysis of localized joint leakage in segmental tunnel linings

Water leakage has become the main defect that affects the safe operation of shield tunnels in the saturated stratum. Long-term leakage is proven to change the load distribution and stress state of the tunnel lining, which hampers the structural performance of the tunnel. This paper proposes a novel numerical approach to simulate the localized leakage of segmental linings. The mechanical response of the longitudinal/circumferential joints is obtained by using a developed joint connection element, while the seepage response of the joints is simulated by implementing the DFLOW subroutine in Abaqus. The hydraulic boundary conditions are set at both longitudinal joints between segments and circumferential joints between rings. The hydromechanical behavior of the surrounding soil is incorporated based on the stress-pore water pressure interaction. A series of parametric numerical analyses is performed to explore the influences of partial leakage at the circumferential joints on the lining forces, lining deformation, and ground settlement. The simulation results demonstrate that the internal forces and maximum settlement of the tunnel structure and the magnitude of the ground settlement are substantially affected by the seepage rate, while the shear stiffness of the circumferential joints has only a slight effect. The longitudinal settlement of the tunnel and ground surface increase with the increase in the seepage rate of the circumferential joints, and a leakage-location-related distribution pattern is observed. The shear stiffness of circumferential joints mainly affects the pattern of the differential settlement of segmental linings in the longitudinal direction. These analyses indicate the appropriateness of such detailed three-dimensional simulations for capturing the realistic hydraulic and mechanical interactions of joint-leaked segmental linings.

Interpretation of Humanoid Design towards ASD Learning Abilities: Theoretical framework

The humanoid robot has been used in part of the intervention programme for Autism Spectrum Disorder (ASD). Some studies address what kind of form and functionality a human-like robot should have to be socially accepted by them as Autism Spectrum Disorder (ASD) children's motivation faces complex challenges. This research aims to study the specific factor, problems and connection elements between the contexts of issues related to the interpretation of humanoid design toward ASD learning abilities. All the studied variables identified from the literature of recent theory models were summarized and arranged accordingly to form the conceptual framework. Keywords: Humanoid Robot Design; Personalisation; New Product Development; ASD Learning Abilities eISSN: 2398-4287 © 2022. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open access article under the CC BYNC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia. DOI: https://doi.org/10.21834/ebpj.v7iSI7%20(Special%20Issue).3807

Resistance to Assimilation: Expanding Understandings of First Nations Cultural Connection in Child Protection and Out-of-home Care

ABSTRACT Aboriginal and Torres Strait Islander cultures are integrated into child protection and out-of-home care (OOHC) systems via the connection element of the Aboriginal and Torres Strait Islander Child Placement Principle (ATSICPP). This article focuses on cultural connection in Australian child protection and OOHC systems over time, from its inception to its contemporary use to improve health and wellbeing and ameliorate cultural disconnection. An expanded understanding of cultural connection in Australian OOHC systems is articulated where cultural connection is theorised as a process of culturally connecting, while a critical position concerning the risk of cultural disconnection in OOHC is held. Indigenous cultures are fundamental to individual and community health and wellbeing. However, cultural connection in Australian OOHC systems risks becoming a site of bureaucratic policy compliance to ameliorate the effects of cultural disconnection produced by disproportionate First Nations child removals. This article illuminates this critical position while theorising how culturally connecting can be better understood in OOHC. IMPLICATIONS Cultural connection for First Nations children and young people is important for health and wellbeing, but is poorly understood in child protection and out-of-home care contexts. Cultural connection includes a community element, where culture acts as a point of distinctiveness to show that Indigenous peoples are surviving. At this juncture, cultural connection is a tool to resist the assimilatory impacts associated with ongoing child protection removals. Cultural connection can be understood as a complex journey of connecting for First Nations children and young people.

Analysis of the failure of a tramcar pantograph component through combined experimental approaches

Tramcar vehicles collect the required electrical power from the overhead contact line by means of a pantograph that carries a pan head with collector strips in sliding contact with the contact wire. Therefore, any failure of pantograph or of its components has a direct effect on the correct tramcar operation. The paper deals with a case of unexpected failures occurred on a connection element of the articulated frame of the pantograph of tramcars, causing the interruption of the service. No evidence of impact with the overhead line was detected, only it was clear that the immediate cause was the fatigue failure of a pin of the articulated connection between the upper and the lower arms of the frame of the pantograph. To clarify the original cause of the fatigue failure, an approach combining field measurements, laboratory tests and data processing to obtain the stresses acting on the pantograph failed components under service condition was adopted. It was found that the pantograph was subjected to high level of vibrations coming from the vehicle carbody, mainly due to the track irregularity. A comparative failure analysis was carried out and a solution to upgrade the component subjected to failure was proposed and implemented.

КОНЦЕПЦІЯ МОДУЛЬНИХ ТРЕНАЖЕРНИХ СИСТЕМ ІЗ МОЖЛИВІСТЮ ШВИДКОЇ ЗМІНИ ФУНКЦІОНАЛЬНОГО ПРИЗНАЧЕННЯ

In the study, the author considers the concept of building simulator systems of vehicles based on theoretical justification, creation and construction of technical systems according to modular principles. The modern view of the process of creating training systems is based on the principles of strict compliance of each object of imitation to its purposefully created training system. The use of modular principles of creating training systems allows you to solve problems related to increasing their efficiency and reliability. This approach corresponds to the concept of creating universal, adaptive training systems: a limited number of training systems - the maximum number of simulation objects. The concept of modular training systems is a novelty, which is distinguished by the fact that in the presence of modules there is a possibility of quickly changing the functional purpose of the system, while the number of modifications of training systems is significantly reduced. The modern development of scientific and technical progress, modern equipment and technologies in the vast majority is carried out according to the principle of modular creation of various technical devices, which differ significantly from each other in the principle of operation, physical parameters and intended use. The "Trainer" module can be represented by any design solution and consists of a fixed support, a frame, a turning mechanism, a lifting mechanism, a balancing mechanism, a turning mechanism of the cab, which is an element of connection with the "Cabin" module through a universal base. The application of the principle of modular construction in exercise equipment will allow to create a single system of construction of exercise equipment and exercise equipment, which in turn provides an opportunity to establish uniform requirements for exercise complexes and methods of their evaluation and comparison. This modular approach to the construction of simulators will determine the maximum economic and technical result of the implementation of simulator equipment. Keywords: modular principle; operator's cabin; dynamic platform; simulator; simulator training; information subsystem.

Recensión de 100 años Edgar Morin. Humanista Planetario

The book ‘100 years Edgar Morin: Planetary Humanist’ [‘100 años Edgar Morin. Humanista Planetario’] was published in the centenary of the author as aknowledgement of his contributions to a planetary thinking. The aim of this review is to comment the relevant aspects of the twenty chapters that it is made of, having all the connection elements among them as a foothold and that bring a common sense to the work. As a result, it was observed that Morin’s planetary perspective and the relevance that he has attributed to the context are the connection elements of the twenty chapters, highlighting that the whole is a textual hologram that gives the reader multiple possibilities of reflections about the current reality and the uncertainties in relation to the future of humanity, bonding the challenges in education to emergent and necessary metamorphoses.

Immersive Experience in Virtual Reality Horror Game

In this study, we proposed an analysis framework that examines participants' immersive experience processes from three dimensions: (1) the state of enjoyment, (2) transformation of the awareness of time, and (3) a sense of spatial integration. We found that the balance of skills and challenges is threshold factor affecting participants’ overall enjoyment state and experience of transforming the time awareness during a VR gaming process. When considering the influence of social interaction on the three dimension of enjoyment, time and space, a new emerged element of emotion connection suggests that an autotelic experience – the feel of intrinsically rewarding during the process of interacting with other partners is a threshold factor affecting participants’ overall enjoyment. Further, that the mechanism by which fear is transformed into enjoyment corresponds to the element of a sense of control in the state of flow.

A discrete fiber network finite element model of arterial elastin network considering inter-fiber crosslinking property and density

Inter-fiber crosslinks within the extracellular matrix (ECM) play important roles in determining the mechanical properties of the fibrous network. Discrete fiber network (DFN) models have been used to study fibrous biological material, however the contribution of inter-fiber crosslinks to the mechanics of the ECM network is not well understood. In this study, a DFN model of arterial elastin network was developed based on measured structural features to study the contribution of inter-fiber crosslinking properties and density to the mechanics and fiber kinematics of the network. The DFN was generated by randomly placing line segments into a given domain following a fiber orientation distribution function obtained from multiphoton microscopy until a desired fiber areal fraction was reached. Intersections between the line segments were treated as crosslinks. The generated DFN model was then incorporated into an ABAQUS finite element model to simulate the network under equi- and nonequi-biaxial deformation. The inter-fiber crosslinks were modeled using connector elements with either zero (pin joint) or infinite (weld joint) rotational stiffness. Furthermore, inter-fiber crosslinking density was systematically reduced and its effect on both network- and fiber-level mechanics was studied. The DFN model showed good fitting and predicting capabilities of the stress-strain behavior of the elastin network. While the pin and weld joints do not seem to have noticeable effect on the network stress-strain behavior, the crosslinking properties can affect the local fiber mechanics and kinematics. Overall, our study suggests that inter-fiber crosslinking properties are important to the multiscale mechanics and fiber kinematics of the ECM network.

Musik als Krisenprävention im Corona-Lockdown

From April 20, 2020 to April 20, 2021 a preventive music therapy offer was made available free of charge on the website lieblingslied.at with the aim of making a contribution to psychosocial prevention in times of COVID-19-related social distancing in Austria. After individual users had registered, they were each connected to a music therapist or music therapy student who, at an agreed time, played a favourite song of the users’ choices and then talked with them about it. The music-sociological research accompanying this project provided valuable information about this new format of music therapy and how people deal with music in times of social crisis. The participants showed a high level of awareness of the potentially mood-regulating effects of music, and they emphasized the connecting and strengthening element of listening to music together with someone. The potential of a low-threshold preventive-therapeutic music offer, which can also be used without physical co-presence, was confirmed in the consistently positive feedback from the participants. Although the service was widely publicized in newspapers and on the radio, the participation of therapy seekers remained below expectations. The project primarily addressed a particularly music-interested, highly educated audience.

Perforated board shear connector for timber-concrete composites

ABSTRACT Timber-concrete composites systems offer major structural advantages, as well as additional benefits in terms of sustainability in comparison with only-timber or only-concrete solutions in building work. This paper describes the behaviour of shear connections for a new and simple construction system. It is based on the transmission of shear forces between the two layers of the system through perforations in the wooden boards, without the necessary collaboration for additional connecting elements (fasteners, adhesive or notches). Tests were performed to analyse how the behaviour of the shear connectors was affected by the arrangement of the boards (single or separated), the type and distribution of the perforations and the use of slab reinforcement. The experimental results indicate that this solution has high strength values, with very high service stiffness and ductile failure when at ultimate state, which enables a high level of composite action for connection design. The stiffness coefficient varies from 283.5–887.7 kN/mm per metre. The test pieces with separated boards and reinforcement bars showed the best results, regardless of the size and arrangement of the holes in the boards.

Computationally Efficient Modeling of Lightweight Expeditionary Airfield Surfacing Systems at Large Length Scales

Expeditionary airfield matting systems are lightweight, portable surfaces that enable the rapid deployment of infrastructure to support aircraft operations. Individual matting components are assembled via interlocking joints to construct arrays that serve as temporary aircraft operating surfaces. The paper outlines the homogenization of the AM2 portable airfield matting system and its interlocking mechanisms to permit computationally efficient analyses toward understanding mechanisms that influence the global behavior of these arrays and underlying subgrade during aircraft maneuvers. An equivalent orthotropic two-dimensional continuum was developed from finite element analysis of a detailed three-dimensional model and its flexural behavior was validated against experimental data and solid finite element models. Interlocking joints were characterized using node-to-node connector elements based on subscale finite element studies. Both components were implemented into a full-scale model representative of a typical test section, and responses to static high tire pressure aircraft loads were analyzed over a soil foundation representing a California bearing ratio of 6%, yielding promising agreement with experimental data. Results of this study reveal an inherent coupling between load transfer, mat deflection, and near-surface subgrade stress with dependence on tire location, mat core shear flexibility, and joint stiffness.

Numerical Study on Connections of Replaceable Shear Link with Inserted Pins

The link end plate of replaceable shear link in eccentrically braced frames has been modified with the ‘inserted-pins’ to ensure the high seismic performance and to reduce the number of bolts in its slip-critical connections. The maximum shear force in the connection is resisted by the pins, while the bolts resist the bending moment at the link-ends. Numerical work has been conducted using a non-linear ABAQUS program to study the deformation as well as the stress distribution of the shear-link and its connection elements: end plates, bolts, pins, and beam-outside the link. The results showed an adequate performance of the proposed modified shear link connections, where the end plate of the beam outside the link remained elastic as the shear-link reached 0.08 rad plastic rotation due cyclic loading.

Advanced and emerging materials for testing a curtain wall connection element for improved seismic performance

The research for emerging and disruptive new materials and advanced technologies is a driver of technological innovation in both industry and academia. In this work, the authors present some parts of the results of their research and investigation. The experimental research of advanced materials is a constantly evolving field, concerning the need to respond to increasingly advanced technical performance, even in the construction sector and specifically for Building Envelopes. In this context, the contribution concerns ongoing experimental research, which investigates the dynamic behavior of non-structural elements of the Facade subjected to the action of the earthquake. The results of the investigations conducted so far aim to increase innovation in the field of advanced materials for extreme applications, for the constraints on the implementation of the technologies (increasing element sizes, higher mechanical strengths, better performance), exploiting the superelastic effect (SE) and the shape memory effect (SME). Thus, it seems clear that the potential of the two unique properties for Facade Design applications is a valuable tool for investigating dynamic behaviors that exist in nature as well.

THE PHENOMENON OF SOCIAL SOLIDARITY THROUGH SOCIAL MEDIA DURING THE COVID-19 PANDEMIC (Case Study on Music Concert #dirumahaja by Narasi TV)

This research is motivated by various social solidarity actions both offline and online that happen a lot in the community during the Covid-19 pandemic. This qualitative research method aims to get an overview of the phenomenon of social solidarity through social media conducted by Narasi TV through the Music Concert #dirumahaja Fighting Corona Solidarity. The theory used is the theory of social capital which consists of trust, reciprocity, social interaction and elements of social media 4C those are context, communication, collaboration and connection. Primary data sources were gained through observations on Instagram @narasi.tv and interviews with 5 followers of @narasi.tv who took part in the #dirumahaja Corona Fighting Solidarity Music Concert and made donations. Meanwhile, secondary data sources were gained through questionnaires to 50 followers of @narasi.tv. The results show that trust, reciprocity and social interaction as well as elements of social media 4C context, communication, collaboration and connection play an important role in increasing social solidarity through social media. The use of verified social media accounts and trusted online donation platforms as well as the involvement of well-known figures and the right communication strategies have made the #dirumahaja Corona Fighting Solidarity Music Concert became the pioneer in social solidarity actions through live streaming music concerts on social media.

Options in the treatment of superficial and deep venous disease in patients with Klippel-Trenaunay syndrome

ObjectiveKlippel-Trenaunay syndrome (KTS) is a congenital mixed mesenchymal malformation syndrome that includes varicose veins, capillary and venous malformations, lymphatic abnormalities, and hypertrophy of various connective tissue elements. The purpose of the present study was to describe the clinical characteristics and outcomes in a subset of patients with KTS in whom venous interventions, including iliofemoral venous stenting, were performed after failure of conservative therapy. MethodsA single-center retrospective data review of 34 patients with KTS who had undergone interventions for venous disease between January 2000 and December 2020 was performed. ResultsTheir mean age was 38.4 ± 17.5 years (range, 12-80 years). No gender predilection was found. Of the 34 patients, 61% had had all three features of the classic triad for KTS. Varicose veins were present in all 34 patients (100%), and 30% had had a history of bleeding varicosities. Most patients (79%) had CEAP (Clinical, Etiology, Anatomy, and Pathophysiology) class ≥C4. Of the 34 patients, 30% had a history of deep vein thrombosis and/or pulmonary embolism. Factor VIII elevation was the most common thrombophilia condition (12%). The venous filling index was elevated at baseline (5.9 ± 5.1 mL/s) and did not normalize despite intervention (3.5 ± 2.3 mL/s; P = .04). The superficial venous interventions (n = 35) included endovenous laser therapy; stripping of the great saphenous vein, small saphenous vein, anterior thigh vein, or marginal vein; ultrasound-guided sclerotherapy; and stab avulsion of varicose veins. One coil embolization of a perforator vein was performed. Deep interventions (n = 19) included endovenous stenting (n = 15), popliteal vein release (n = 3), and valvuloplasty (n = 1). The venous clinical severity score had improved from 9.4 ± 4.5 to 6.2 ± 5.6 (P = .04). The visual analog scale for pain score had improved from 5.5 ± 2.7 to 2.5 ± 3.3 (P = .008). Healing of ulceration was noted in 75% of the patients. Significant improvements in the total pain (P = .04) and total psychological (P = .03) domains were noted in the 20-item chronic venous disease quality of life questionnaire. ConclusionsSuperficial and deep venous interventions are safe and effective in patients with KTS when conservative therapy has failed. Iliofemoral venous stenting is a newer option that should be considered in the treatment of chronic deep venous obstructive disease in patients with KTS in the appropriate clinical context. An aggressive perioperative deep vein thrombosis prophylaxis protocol should be in place to reduce thromboembolic complications in these patients.

DEVELOPMENT OF A MATHEMATICAL MODEL OF THE "SHROEDER-TRANSPORTER" SYSTEM IN THE TECHNOLOGY OF PROCESSING CABLE WASTE

The article deals with the development of a mathematical model of the "Schroeder - Transporter" system, which is the main part of the technological process of processing waste cable and wire products. The task of increasing the efficiency of the cable waste recycling process is solved by optimizing the operation of all electromechanical systems: crushers, shredders, granulators and their connecting elements - conveyors. The very process of moving crushed cable production waste has an unstable nature of the load of the moving web, and the reduction of dynamic loads during the start-up of the electromechanical system of the conveyor, the transfer of cargo from one crushing equipment to another is very important. The solution is to control the operating modes of the conveyor by the speed parameters of the tape movement and the change in dynamic loads in case of uneven loading and movement of the flow of the crushed cable mass. The mathematical model of the electromechanical system "Conveyor - shredder" is based on the study of the movement of the tape, which will take into account the uneven traffic, as well as the presence of large and unstable dynamic effects. The choice of modeling parameters is also determined by the flow of processes in the conveyor belt with variable loads and will ensure that the elastic-viscous properties of the entire system are taken into account when the load is transferred along the conveyor in compliance with the speed parameters that are optimal for the operation of the entire waste processing line.

NADPH Oxidases Connecting Fatty Liver Disease, Insulin Resistance and Type 2 Diabetes: Current Knowledge and Therapeutic Outlook.

Nonalcoholic fatty liver disease (NAFLD), characterized by ectopic fat accumulation in hepatocytes, is closely linked to insulin resistance and is the most frequent complication of type 2 diabetes mellitus (T2DM). One of the features connecting NAFLD, insulin resistance and T2DM is cellular oxidative stress. Oxidative stress refers to a redox imbalance due to an inequity between the capacity of production and the elimination of reactive oxygen species (ROS). One of the major cellular ROS sources is NADPH oxidase enzymes (NOX-es). In physiological conditions, NOX-es produce ROS purposefully in a timely and spatially regulated manner and are crucial regulators of various cellular events linked to metabolism, receptor signal transmission, proliferation and apoptosis. In contrast, dysregulated NOX-derived ROS production is related to the onset of diverse pathologies. This review provides a synopsis of current knowledge concerning NOX enzymes as connective elements between NAFLD, insulin resistance and T2DM and weighs their potential relevance as pharmacological targets to alleviate fatty liver disease.

“DNISTER” REGIONAL LANDSCAPE PARK - IN THE TERRITORIAL RECREATIONAL NETWORK OF PODILIA

The publication considers the peculiarities of the nature of the regional landscape park "Dnister", the landscapes of which have been influenced by economic activity. According to the tested method, its recreational potential and transport accessibility were assessed. The role of the park in the possible provision of recreational services for 90 thousand people and almost 560 thousand people in total has been established. The important socio-economic role in the regional recreational system of Vinnitsa region, as well as the key role in environmental and ecological networks is recognized. It is noted that RLP is a connecting contact element with the ecological network of the Republic of Moldova.
 The intensification of the creation of regional parks is dictated both by objective preconditions (available recreational resources, growing needs of the local population in providing recreational services) and the interest of local authorities in increasing the area of protected areas. In addition, the newly created territories and objects of the NPF correspond to the conceptual principles of forming a regional network of protected areas and the formation of the integrity of the basic elements of the regional ecological network. Therefore, the landscapes of RLP "Dnister" are involved in the formation of a key area of regional importance of the eco-network of Vinnitsa and Podillya in general.
 Calculations of the recreational capacity of the territory showed that within the RLP "Dnister" the minimum recreational capacity is 1219400 people, the average - 1524250, the maximum - 18291000 people. This type of assessment takes into account the average load per square kilometer. If calculations are made within the functional zones of the park (Table 2), the recreational capacity will be redistributed mainly between the zones of regulated and stationary recreation, the economic zone with partial use of the protected area.
 Since the recreational and economic zones of the park occupy about 70% of the territory, for a more accurate assessment of the recreational capacity of the functional zones need to use a reduction factor of 0.7.
 A more detailed spatial assessment of recreational capacity requires consideration of the decreasing slope steepness coefficient. At steepness of slopes of 10-20% - the lowering factor of number of vacationers makes 0,8; at 20-30% - 0.6; 30-50% - 0.4; over 50% - 0.2. As an average for RLP, we took a reduction factor of 0.6, which was used for the entire park.
 RLP "Dnister" is endowed with a high potential of natural and historical and cultural recreational resources available for short-term recreation of about 90 thousand locals, with a potential recreational capacity of 560 thousand people.
 The Dnister Regional Landscape Park is an important element not only of the regional recreational system, but also of the Podillya regional eco-network and is dedicated to the national-wide eco-corridor, which connects a number of key areas of the Middle Trans Dnister National Park.
 Key words: Regional Landscape Park, Dnister, territorial recreational network, Podillya.

THE MANUFACTURING PRODUCTS AND PARTS BY 3D-PRINTING METHOD FROM COMPOSITE FILAMENTS WITH HIGH METAL CONTENT

It is established that one of the most promising areas of development of modern engineering is the development of new technologies for rapid production (rapid manufacturing), the essence of which is the layered design of powder products based on CAD model, ie model whose three-dimensional geometry is described digitally by using solid modeling programs (AutoCAD, SolidWorks, Compas-3D, CATIA, ProE, etc.). The main advantages of using additive technologies, including 3D printing with filaments containing metals. The types of 3D printers that print metal are considered. The use of metal powders in 3D printing technologies is described. The main characteristics and properties of such metals, TI titanium, stainless steel SS, aluminum Al, copper Cu, FE iron and alloys based on them can be used as materials or additives in additive technologies. The advantages of their use over traditional technologies (casting, rolling, etc.) are described. The scheme of technological process of manufacturing products of industry mechanical engineering by a 3D printing with a high metal content is given. Each of the stages of the technological process is considered and described. Stainless steel metal powder was selected for the manufacture of filament and its chemical composition is investigated. Experimental studies have been conducted to determine the mechanical, thermophysical and rheological characteristics of polymeric materials used for the manufacture of 3D prints. On the basis of the studies, it is proposed to use Plastic powder as a connecting element in the filament. The design of the auger for supplying the material of the extrusion machine is designed and manufactured. The form of the extrusion head is developed and selected, which sets the diameter of the filament being made. A 3D printer for printing products and parts with a high metal content was selected and improved. Experimental studies of the wear of the 3D printer’s extruder nozzle on contact with the abrasive thread.