Executive Elements Research Articles

Analysis of the principles of working load formation in power drives of construction machines and equipment

The purpose of the proposed article is the analysis of the principles of the formation of the workload on the executive bodies of construction machines and technological equipment, which is due to the need for their improvement in order to improve the energy and technological indicators of technological processes.The methodology is based on search, research and creative approaches. The methods of development analysis, patent search, synthesis of technical solutions, simulation modelling was used. Scientific novelty. The study of various approaches to ensuring the implementation of the working movements of executive bodies of construction machines and mechanized technological equipment, the analysis of technical solutions allowed to substantiate the directions of development of drives of construction machines to ensure the necessary laws of movement of executive elements. The authors proposed constructive solutions for synthetic drives of construction machines and equipment, proposed energy-saving approaches aimed at reducing energy consumption. Research results. The article deals with important issues of analyzing the formation of loads on executive bodies of construction machines and equipment. Synthesized constructive solutions obtained in the course of patent research, analysis of modern technical solutions, rational technical design and expert evaluation are presented. A technical solution is proposed to ensure the implementation of adaptive feed in a hydraulic power drive, which can be used in the modernization of existing drives of construction machines and moving parts of mechanized technological equipment.

Message Effectiveness of Fear Appeals in Vaccination Communication Campaigns: A Systematic Review.

This systematic review of 54 cross-disciplinary peer-reviewed causal empirical studies helps public health officials, researchers, and healthcare professionals better comprehend the effects of fear appeals in vaccine promotional campaigns on message processing, persuasion, vaccination attitudes, and vaccination intentions. This review documents inconsistent findings across studies, which it attempts to clarify by considering differences in research designs, sample populations, and outcomes measured. In general, we find that fear appeals increase risk perceptions, message involvement, and vaccination attitudes. However, fear appeals have less influence on vaccination intentions, especially among female and general adult populations or populations from the U.S. and other Western cultures. On the other hand, the effect of fear appeals on vaccination intentions is stronger among student populations and those from China (People's Republic of China and Hong Kong) and other non-Western cultures. Also, fear appeals are less persuasive when promoting COVID-19 vaccines and boosters than they are for other vaccines (e.g., HPV, influenza, MMR). Future research should compare fear appeal effectiveness in messages across vaccines or when combined with other executional elements, such as the endorser or type of evidence provided. Finally, future studies should explore other methodological approaches and measure underexplored message outcomes, such as vaccine uptake behavior, in more naturalistic settings.

Efficiency of multi-armature linear pulse electromechanical power and speed converters

Introduction. High-speed linear pulse electromechanical converters (LPEC) provide acceleration of the executive element in a short active section to high speed with significant displacement, while power-purpose LPECs create powerful power impulses of the executive element on the object of influence with minor movements. One of the areas of improvement of LPEC is the creation of multi-armature structures. Methodology. To analyze the electromechanical characteristics and indicators of LPEC, a mathematical model was used, which takes into account the interconnected electrical, magnetic, mechanical and thermal processes that occur when connected to a pulse energy source with a capacitive energy storage. The main results of the calculations were performed in the COMSOL Multiphysics software environment and confirmed by experimental studies in laboratory conditions. Results. The features of the electromechanical processes of multi-armature LPECs are established and their indicators are determined. With the help of efficiency criteria, which take into account electrical, power, speed and magnetic indicators in a relative form with different options for their evaluation strategy, it was established that multi-armature LPECs for power purposes have increased efficiency, and for high-speed LPECs the use of multi-armature configurations is impractical. The conducted experimental studies confirm the reliability of the calculated results. Originality. It has been established that almost all multi-armature LPECs for power purposes have higher efficiency compared to a converter with one armature, and for high-speed LPECs it is advisable to use traditional LPECs with one armature. Practical value. On the basis of multi-armature LPECs, models of an electromagnetic UAV catapult, a magnetic pulse press for ceramic powder materials, an electromechanical device for dumping ice and snow deposits from a power line wire, a device for destroying information on a solid-state digital SSD drive have been developed and tested. References 20, tables 4, figures 8.

How do leading Japanese cosmetic brands use consumer culture positioning strategies in China? Investigating six Japanese brands’ advertisements on Weibo

China is the world’s second-largest cosmetic market and is dominated by foreign brands. However, little is known about Japanese cosmetic brands marketing communication in China. Consumer culture positioning is deemed a promising framework for understanding international advertising. This study examines six Japanese cosmetic brands’ consumer culture positioning (CCP) strategies in their global advertisements to see how they implement CCP strategies in China. 756 video-format ads were collected from their official accounts on Weibo. Content analysis was conducted to analyse how ad executional elements communicate CCP strategies. Results show that these Japanese brands generally implement mixed CCP strategies, but that certain ad executions focus on a specific singular CCP strategy. The results document CCP strategies in international advertising practices, offering essential insights into what advertising executional elements can be employed to communicate different CCPs for cosmetics in China. Important theoretical and practical implications for marketers are also discussed.

Enhancing urban economic efficiency through smart city development: A focus on sustainable transportation

An urban energy execution for smart transportation, evaluation, and impacting element model has been additionally built-in smart cities by the improved stochastic sustainable investigation technique (ISSIT), and board information from commonplace capitals has been considered for instance to do an exact examination. The urban energy execution appraisal and impacting variable model could diminish the issues brought about by two-organized execution, evaluation, and factor examination, measure the impacts of appraisal pointers and affecting elements of urban energy execution, and mirror the real execution of various urban communities in smart city transportation. Exact results show that urban energy execution of common capital in China has been expanding. The potential for energy-saving in Chinese common capital is also very high. When evaluating urban energy execution, it was critical to include the energy contribution as an appraisal pointer. Although there was a negative relationship between population thickness and urban energy execution, the temperature record, urbanization rate, and family vehicle possession were all extremely associated with urban energy execution. Chinese common capitals gradually lost their ability to execute urban energy from east to west. As a result of these findings, a few approach recommendations for improving urban energy execution are proposed for smart transportation.

Exploring the influence of green supply chain practices on performance nexus

This exploration examines the potential effects of certain control variables, like firm age, possession, and size of an environmental management organization certification, on any collaborative execution when adapting green supply chain system habits. The study will examine how these variables may influence different features of collective performance. This study employs a multi-step methodology, including a thorough review of existing literature, an empirical survey of 223 participant organizations, and an arithmetical examination to test the proposed conceptual structure to inform the two prospective and matter-of-fact outlooks. The studies have three phases. First, complete written work is reviewed to gain a deeper understanding of the topic. Next, a survey is conducted with responses from 223 participant organizations, and the data is collected. Finally, multiple retrogression analysis is used to evaluate the effects of firm age, possession, and firm size of an environmental management system certification on four elements of associated execution. The study's findings indicate a constructive correlation between fit size and these elements of corporate execution: social, environmental, and economic presentation. So, no connection was found between firm size and functional efficiency. Additionally, the study found that controlling an ecological management organization certification within Pakistani firms had a good effect on all staging elements when firm age did not correlate significantly with any of the four execution results. This study gives practical guides to supply chain executives in Pakistan and other nearby markets to understand better the correlation between these control variables and the execution on collective outcomes.

Different pedagogical approaches to motor imagery both demonstrate individualized movement patterns to achieve improved performance outcomes when learning a complex motor skill.

Cognitive training techniques such as motor imagery (MI)-cognitive simulation of movement, has been found to successfully facilitate skill acquisition. The MI literature emphasizes the need to accurately imitate key elements of motor execution to facilitate improved performance outcomes. However, there is a scarcity of MI research investigating how contemporary approaches to motor learning, such as nonlinear pedagogy (NLP), can be integrated into MI practice. Grounded in an ecological dynamics approach to human movement, NLP proposes that skilled action is an emergent process that results from continuous interactions between perceptual information of the environment and movement. This emergent process can be facilitated by the manipulation of key task constraints that aim to encourage learners to explore movement solutions that satisfy individual constraints (e.g., height and weight) and achieve successful performance outcomes. The aim of the present study was to explore the application of a NLP approach to MI approach for skill acquisition. Fourteen weightlifting beginners (two female and 12 male) participated in a 4-week intervention involving either NLP (i.e. analogy-based instructions and manipulation of task constraints) or a linear pedagogy (LP; prescriptive instructions of optimal technique, repetition of same movement form) to learn a complex weightlifting derivative. Performance accuracy, movement criterion (barbell trajectory type), kinematic data, and quantity of exploration/exploitation were measured pre-mid-post intervention. No significant differences (p = .438) were observed in the amount of exploration between LP (EER = 0.41) and NLP (EER = 0.26) conditions. Equivalent changes in rearward displacement (R×D) were observed with no significant differences between conditions for technique assessments 1, 2, or 3 (p = .13 - .67). Both NLP and LP conditions were found to primarily demonstrate 'sub-optimal' type 3 barbell trajectories (NLP = 72%; LP = 54%). These results suggest that MI instructions prescribing a specific movement form (i.e., LP condition) are ineffective in restricting available movements to a prescribed technique but rather the inherent task constraints appear to 'force' learners to explore alternative movement solutions to achieve successful performance outcomes. Although MI instructions prescribing specific techniques have previously supported improved skill development, the current findings indicate that learners may self-organise their movements regardless of MI instructions to satisfy individual and task constraints while achieving improved performance. Therefore, it may be beneficial to consider scripts that are more outcome focused and incorporate task constraints to facilitate learners' inherent exploration of individual task solutions.

Efficiency evaluating method for coordinated control type on main street

For the majority of cities with an established transport system, certain intensity fluctuations are characteristic, which are cyclical and repeated during a day, day and night and week. Taking into account the available equipment, executive elements of the first layer of intelligent transportation systems (ITS), it is possible to promptly assess the transportation situation and change the mode of control in the on-line format, but this kind of technology is mainly presented in large cities. In spite of the fact that in cities with a small population, belonging to the category of small and medium-sized cities there are identical problems in the field of coordinated management of main streets, on such sections there is no possibility of operational change of management, due to the lack of special equipment and implementation of constant monitoring and control of the traffic situation. In order to improve the efficiency of management in such sections located in small and medium-sized cities, it is necessary to develop a way to evaluate the effectiveness of coordinated management, which is the main purpose of the study.Methods and materials. As a result of the performed research, methods of field observations, calculation methods and modelling methods were used.Results. As part of the completed study, a method to evaluate the effectiveness of the coordinated type of control based on a comparison of the average intensity of the adjacent and mainline section and their corresponding average delay values was developed.Conclusion. The use of the obtained results on the research object made possible to establish time periods of application of coordination and rigid non-coordinated control.

Power Conversion Systems with Synchronous Control and Regulation on the Base of Powerful Diode-Clamped Inverters via Pulse Width Modulation

This article provides a brief overview of the development and dissemination of the method of synchronous multi-zone pulse-width modulation (PWM) in relation to the regulation of diode-clamped inverters which are the main executive elements of the medium-power and high-power adjustable speed electric drives. It is shown that the modified schemes and algorithms of synchronous multi-zone PWM, applied for control of diode-clamped inverters, assure providing minimization of the common-mode voltage in systems, as well as continuous synchronization and symmetry of the base phase and linear voltages in drive systems on the base of diode-clamped inverters over the entire control range. There are no even harmonics and subharmonics in the spectra of the phase and line-to-line voltages of three-phase and six-phase drive systems, which helps to reduce losses in systems and increase the efficiency of their operation. As a result of a comparative analysis of the integral spectral characteristics of the main voltage waveforms of adjustable speed drives based on diode-clamped inverters, recommendations are formulated for the rational choice of schemes and algorithms of synchronous multi-zone PWM for the relevant systems and installations, depending on their operating modes.

Design and FEM Analysis of Plastic Parts of a Tie-Rod Composite Hydraulic Cylinder

Due to a number of advantages, such as a high ratio of power transmitted to the weight of the system, the possibility of easy control and the freedom to arrange system elements on the machine, hydrostatic drive is one of the most popular methods of machine drive. The executive elements in such a system are hydraulic cylinders that convert the energy of the pressure of the liquid into the mechanical energy of the reciprocating motion. One of the disadvantages of conventional actuators is their weight, so research is being done to make them as light as possible. The directions of this research include the use of modern engineering materials such as composites and plastics. The paper presents the process of designing, FEM analysis and experimental validation of the base and gland of a composite hydraulic cylinder. The considered elements are made of PET plastic. During the analysis, material non-linearity was taken into account, and the analysis itself was carried out in two steps. The first was the preloading of the tie-rods, and the second was the loading of the cylinder with internal pressure. The numerical calculations were experimentally validated by prototype tests with the use of strain gauges.

Evaluation of the Overall Quality of the Health Technology Assessment Educational Program from the Perspectives of University Professors and Learners in Iran

Background: Failure to evaluate, examine, and assess the requirements and determine the quality level of the educational program of educational fields will result in low-quality and obsolete curricula. It will prevent the academic areas from achieving their goals.
 Objectives: This study aimed to evaluate the overall quality level of the health technology assessment (HTA) educational program from the perspectives of university professors and students.
 Methods: The study was conducted with 127 university professors, students, and HTA graduates at Tehran, Iran, Kerman, and Yazd Universities of Medical Sciences. A researcher-made questionnaire did the data collection. Cronbach’s alpha coefficient for the entire questionnaire was 91%, and the intra-domain correlation coefficient was 87%, indicating that the instrument was appropriate. The data were analyzed with descriptive and analytical tests based on their normality or non-normality using Kruskal-Wallis and Friedman test and ANOVA or two-way ANOVA.
 Results: This research was completed by 114 out of 127 participants. According to a review of diverse perspectives, the quality of the educational program in terms of design elements in special courses and executive elements in compensatory courses was within the range of average (1.66< mean <2.32) and renege of favorable (mean>2.32). In addition, the majority of executive elements from special courses and design elements from compensatory classes were in an unfavorable position, with a (1.66> mean) the average position (1.66< mean <2.32)
 Conclusions: Problems and inadequacies were observed in a few educational program implementation elements. Therefore, modifications should be made to remedy the inappropriate details and remove implementation obstacles to enhance the interested groups’ capability and practical skills.

No Slogan versus with Slogan: The Different Message Strategies for New Product Digital Video Ads

ABSTRACT Purpose Interestingly, some new product digital video ads use slogans, while some do not. This study aims to identify the similarities and differences between the message strategy elements used in two types of new product video advertisements (no slogan vs. slogan). In addition, it attempts to examine how product innovation newness may moderate the influence of video advertising (no slogan vs. slogan) on the presentation frequency of various elements of the message strategy. Methodology/Approach This study employed content analysis method to confirm the special features of the message strategy for the digital video ads. 1070 digital video advertisements of six technology-driven companies’ new products published on the YouTube website’s corporate accounts in the two-year period from 2018–2019 were collected. Findings This study clarified the ambiguous relationship between message strategy and creative strategy and confirmed the theoretical framework of an advertising message strategy. The results of a content analysis revealed that the presentation frequency of elements of the message strategies for the two types of new product digital video ads (no slogan vs. slogan) were significantly different and confirmed the moderation effect of the product innovation newness. Research Implications Extant literature has mostly confirmed the theoretical value and practical significance of advertising slogans. However, there are few studies on advertising message strategies with or without slogans. Our research attempts to provide a theoretical basis for new product video advertising message strategies with or without advertising slogans. Practical Implications When designing video ad copy, advertisers should have the awareness of integrating the four elements of message strategy for systematically planning. When the advertisers choose to use video ads with slogans, they should adopt more rational appeals, creative elements, information cues, and execution elements. The video advertisements of the two groups of new products (INP vs. RNP) differ significantly in the elements presented by the message strategy in the context of whether there are advertising slogans. Originality/Value/Contribution This is the first study that examines the similarities and differences between the presentation frequency of various message strategic elements of the two types of digital video advertisements (no slogan vs. slogan). In addition, it examined the influence mechanism of advertising slogans on the four elements of message strategy.

Подход к снижению виброактивности малых космических аппаратов

Flawless spacecraft operation and successful implementtation of their research in orbit mainly depend on technical and operational characteristics of the spacecraft orientation and stabilization control systems in space relative to the base frame of reference axes achieved through stabilizing properties of certain external and internal perturbations. The research was aimed at determining static and dynamic imbalances and analyzed the levels of influence of forces and moments created by non-contact electric motor-flywheel operating at the various rotor speeds. In order to reduce the static and dynamic imbalance of the non-contact electric motor-flywheel obtained as a result of ongoing experimental studies, it was proposed to introduce a vibration isolator with natural frequency significantly lower than that in the conventional systems in order to statically hold the non-contact electric motor-flywheel during ground and flight operation. The vibration isolator should have small mass and rigidity, as well as a wide range of operating temperatures, etc. Depending on the orbit altitude, the moments of external disturbing forces acting on the Iskra-5 spacecraft were determined. Electric DC motor-flywheels of various types were analyzed. It was shown that introduction of the non-contact electric motor-flywheel as the executive element of the orientation and stabilization control systems on small spacecraft improved the orientation accuracy. Ways to reduce the effect of vibration disturbances on the spacecraft structure from the non-contact electric motor-flywheel were considered

Building trust, building futures: Knowledge co-production as relationship, design, and process in transdisciplinary science

Understanding and modeling the trajectories of change in broad level interactions in food-energy-water systems is incomplete when it is undertaken by researchers in isolation from those who live and work in the systems. For models and outcomes to have validity they need to be subjected to sustained development and iteration with stakeholders. This requires a paradigm shift in our thinking of stakeholder engagement from viewing such engagement as an isolated activity or part of the data collection methods to thinking of engagement as a process of knowledge generation. That process hinges on building relationships and building trust, and also sustaining these as long-term relationships through multiple elements of research design and execution. Using the case-study of a mid-size river basin we demonstrate a co-production of knowledge process for food-energy-water systems. The findings highlight the multiple and different ways in which knowledge co-production can be transacted in food-energy-water systems while also generating solutions to the use and re-use of water, energy, and nutrients at the landscape level.

Gramsci on Pirandello’s Theater: Pragmatism and National Tradition

Abstract: Antonio Gramsci’s contributions have engaged scholars for nearly a century, sporadically favoring topics such as literary criticism and theater. This article examines his critique of Luigi Pirandello’s theater and the direct impact of artistic and cultural elements on the success of a play. Gramsci’s reviews for Avanti! along with Quaderni del carcere will demonstrate the evolution of his conception of success, which is denoted by pragmatic elements of dramatic execution, set forth for playwrights, directors, actors, and audiences alike. His opinion on Pirandello’s productions will reveal a mix of mild criticism and resigned approval, despite the playwright’s international fame.

Dynamic correction in manipulator control systems based on intelligent linear motion mechatronic module

Robotic complexes and robotic manipulators are widely used in the management of various objects and processes of control systems; their performance is directly related to the execution element. Electromagnetic actuators of multi-function control systems are structurally created separately for each adjustment body and lead to system complexity. To solve these problems, improve the executive system's weight-gauge indicators, and simplify the structural schemes, implementing intelligent mechatronic modules that perform linear and rotational movements in space coordinates is one of the urgent tasks. In this article, dynamic correction in manipulator control systems built based on an intelligent linear motion mechatronic module is considered. In manipulator control systems, the use of intelligent mechatronic modules in dynamic correction for manual and semi-automatic control manipulation systems that do not have a feedback channel for forces and moments and the relevance of the handle movement and manipulation objects with such a selection of the forces and moments vector m developed by them was seen. The article presents mathematical models for calculating vector components based on the current values of the generalized coordinates of the manipulator, their speed and acceleration, and the selection of the vector of forces and moments m developed by the intelligent mechatronic modules of the manipulator.

Единая система отсчета геометрических характеристик размерных элементов деталей. Часть I. Теория двух размеров максимума и минимума

A unified reference system for geometric characteristics is based on the classification of joints of applied mechanics, in which the class number is determined by the number of degrees of freedom limited by mating elements of parts and has received the short term «informativeness». Different information content of the bases of elements that materialize coordinate systems determines different information content of the coordinate axes – four, two, zero and different information content of design planes – three, two, one. The paper shows that the information content of elements in the functions of auxiliary bases and executive elements determines the number and type of coordinates (linear and angular), with the help of which it is necessary to set their position in the generalized coordinate system of the part. It is shown that the accuracy of coordinating dimensions should be specified by symmetrical tolerances for linear and angular dimensions.

ELABORATION AND RESEARCH OF VIBROSHAKERS WITH ELECTROMAGNETIC DRIVE FOR CLASSIFICATION OF DRY MATERIALS

There are schemes of various vibroshakers for classification of dry materials for construction, agriculture, food and processing industry, in mining and transport, examined in this article. As a result, of the analysis the authors came to conclusion about low efficiency and reliability of known vibroshakers. In course of their functioning significant part of consumed energy is spent for bringing in movement of massive driving elements. Actually, each of these vibroshakers realizes only one scheme of loading with relatively narrow range of change of its main parameters (amplitude, frequency, transmitting energy). Besides, intensive dynamic loadings make a negative influence on supporting elements of these machines and that leads to their rapid wear. With examination of these disadvantages of known vibroshakers, authors elaborated schemes of improved vibroshakers with electromagnetic drive for classification of dry materials. The proposed vibroshakers provide complex schemes of loading of processed material and that promotes to increase of efficiency of the working process. In one of these schemes foreseen possibilities of change of location of electromagnetic vibro-exciters relatively of foundation. Later allows to change a scheme of loading of the processed material depending from its physical-mechanical characteristics. An electromagnetic drive of the improved vibroschakers gives possibility of a separate and accurate adjustment of the main parameters of the loading of material in wide range. In the constructions of the vibroschakers are absent elements of friction and massive inertia masses therefore they have an increased reliability and efficiency. There are differential equations of the movements of the executive elements of the vibroschakers are proposed in the article that allow to determine their main working parameters in course of different stages of a working cycle. These equations can be used for creation of methods of design calculation of the proposed vibroschakers.

Implementation of the optimal dynamic mode movements of the roller forming installation

In order to increase the reliability and durability of the roller forming installation, the optimal dynamic mode of the reciprocating movement of the forming carriage was calculated.
 When calculating the optimal dynamic mode of motion, the criterion action is used as a criterion for the motion mode, which is an integral over time with an integral function expressing the "energy" of accelerations. The functions of changing the kinematic characteristics of the forming trolley during its movement from one extreme position to another, which correspond to the optimal dynamic mode of reciprocating movement, were calculated. With this mode of movement, the movement and speed of the forming carriage change smoothly, without creating significant dynamic loads in the installation, which in turn has a positive effect on its durability.
 Taking into account the functions of changing the speed of the forming carriage, the law of changing the angular speed of rotation of its rolling rollers was calculated. The design of a roller forming unit with a drive from a high-torque stepper motor, which is mounted in the rolling rollers of a forming carriage and provides an optimal dynamic mode of reciprocating movement of the forming carriage, is proposed.
 When using the specified drive in the installation, the quality of the surface of the processed concrete mixture increases, dynamic loads in the elements of the drive mechanism are reduced, unnecessary destructive loads on the frame structure disappear and, accordingly, the reliability and durability of the installation as a whole increases.
 The results of the work may be useful in the future for clarifying and improving the existing engineering methods for calculating the drive mechanisms of roll forming machines both at the design/construction stages and in real operation modes. Also, the results of the work can be useful in the design or improvement of mechanisms with reciprocating movement of executive elements.

Drawn to the gloss: Examining the effect of product reflection on product aesthetics

AbstractWhile advertising products with reflections is a common industry practice, this research is the first to investigate their impact on product aesthetics. Reflections are endowed with an inherent shine since they are naturally formed by the interaction of light with an object and a reflecting surface. We draw upon this property along with Evolutionary Psychology (EP) research documenting an intrinsic human attraction towards gloss to predict their positive effect on product aesthetics. Further in line with the EP principles, we propose that this effect is mediated by enhanced pristineness perceptions about the product in the presence of its reflection in the ad. Finally, we draw upon the Elaboration Likelihood Model (ELM) to identify product design complexity as a boundary condition for the positive effect of reflection on product attractiveness perceptions. For a product with relatively high (vs. low) design complexity, with design being the focal aspect that is elaborated via a central route, we predict the effect of a peripheral stylistic cue like product reflection to attenuate. Three experimentally designed studies employing different product types offer empirical support to these predictions. Our work extends prior marketing research studying the effects of executional elements in advertising on consumers' product reactions, particularly the aesthetic impact of product reflections as creative stylistic cues. The managerial implications of this work span both traditional and digital marketing channels. Incorporating a product reflection in advertising can work as an easy‐to‐implement option that can help practitioners elevate product pristineness and aesthetics. On the other hand, avoiding their use when advertising products with relatively complex designs can save both ad space and money.