Wheel Model Research Articles

P-1719. Promoting antibiotic stewardship for commercial poultry production in Bangladesh: using social and behavioral change communication approach

Abstract Background Bangladesh has a high prevalence of antimicrobial resistance due to extensive antibiotic use in humans and animals. This study aimed to develop social and behavioral change communication (SBCC) strategies to promote antibiotic stewardship in commercial poultry production in Bangladesh. Methods In 2022, we used formative research findings to explore contextual factors of antibiotic sale, prescribing, promotion, and use among four groups in Narsingdi, Bangladesh: 1) poultry farmers, 2) pharmacy shop employees, 3) veterinarians, and 4) pharmaceutical representatives. We conducted multiple intervention design workshops to select target behaviors and develop SBCC messaging. We used the behavior change wheel model to analyze the data and summarize the findings. Results Participants identified their behaviors considered to be changed and assisted in developing SBCC for all four stakeholder groups. Poultry farmers had two behaviors to change: not following infection control measures and irrational antibiotic use. SBCC target behaviors included taking appropriate infection control measures, seeking registered veterinarian consultations, and rational antibiotic use. Pharmacy shop employees had one behavior to change: unnecessary antibiotic dispensing practices. SBCC target behaviors included asking farmers for prescriptions and referring them to registered veterinarians. Registered veterinarians had one behavior to change: unnecessary antibiotic prescribing practices. SBCC target behaviors included appropriate antibiotic prescribing practices and increasing farmer awareness for rational antibiotic use. Pharmaceutical sales representatives had one behavior to change: unethical antibiotic promotion. SBCC target behaviors included appropriate antibiotic promotion. Conclusion We identified stakeholders considered behavior change and SBCC intervention delivery to them to promote antibiotic stewardship for commercial poultry production, including improved health-seeking behaviors, and improved health literacy on antibiotic transactions. The study findings may contribute to developing health communication materials to promote antibiotic stewardship among stakeholders in commercial poultry production in Bangladesh. Disclosures All Authors: No reported disclosures

Continuing the Evaluation Journey: Sharing the Lunaape Seven Directions Medicine Wheel (7DMW™) Model

As part of decades of Indigenous evaluation scholarship in the global North and South this article highlights how decolonized, culturally responsive, and Indigenous evaluation frameworks, theories, and methods can be developed and refined over time. Using a Lunaape Medicine Wheel framework, the author builds on the four directions and extends it to a Seven Directions Lunaape Medicine Wheel (7DMW™) model using traditional teachings and language, educational and career pathways development, and real-world applications. The article offers multiple examples of how the 7DMW framework has been used in contemporary ways to evaluate entrepreneurial business values, ethics, philosophy, and operations an has been applied to evaluation projects and initiatives. The article concludes with reflections on capacity building and strategies for bridging Indigenous and non-Indigenous contexts and evaluators. The reader should leave with professional, academic, and personal insights that should be considered for future evaluative thinking, professional development, equitable and sustainable resource allocation, policy, and practice at the program, organizational, systems, and nation-to-nation (First Nation and public government) levels.

Experiences of policy-advisors in capacity, opportunity and motivation for implementing local tobacco control

Abstract Introduction Due to decades of decentralisation of public health policies, local governments have been given increased tobacco control responsibilities across European countries. Previous studies suggest that implementing local tobacco control policies is not without challenges (e.g., lack of resources and enforcement capabilities). This study investigates the policy implementation of both smoke-free environments and smoking cessation support services by local public health professionals in the Netherlands. Method We interviewed 24 officials of regional public health departments about the barriers and facilitators of implementing local tobacco control policies. Interviews were transcribed, analysed and classified using the Behaviour Change Wheel model (COM-B) comprising of the three components capability, opportunity, and motivation. Results Personal motivation was an important condition for public health professionals to work on specific subtopics within tobacco control. Smoke-free environments were generally considered most motivating to work on, but also involve practical obstacles such as a lack of enforcement capabilities. Smoking cessation support services were reported to be less attractive to work on, as there are no clear guidelines on what public health professionals could and should do regarding smoking cessation support. Conclusion Municipalities and local public health departments may contribute to tobacco control by creating smoke-free areas and offering services to help people stop smoking. The national government of the Netherlands could support local governments by providing clearer guidelines on creating smoke-free spaces and on how to improve local smoking cessation support services.

Advancing translational research in digital cardiac rehabilitation: The preparation phase of the Multiphase Optimization Strategy.

While digital cardiac rehabilitation (CR) is an effective alternative to center-based CR, its components and mechanisms of change remain poorly understood. The Multiphase Optimization Strategy (MOST) provides a framework that allows the effects of individual components of complex interventions to be studied. There is limited guidance within MOST on how to develop a conceptual model. This article describes the development of a conceptual model of digital CR. The conceptual model was developed based on several strands of evidence: (i) a systematic review of 25 randomized controlled trials to identify the behavior change techniques in digital CR interventions, (ii) a qualitative study of patients' (n = 11) perceptions of the mechanisms of digital CR, and (iii) a review of international guidelines. Tools and frameworks from behavioral science, including the Behaviour Change Wheel, Capability, Opportunity, Motivation and Behavior model, and Theoretical Domains Framework were used to integrate the findings. An initial conceptual model of digital CR was developed and then refined through discussion. The conceptual model outlines the causal process through which digital CR can enhance outcomes for patients with cardiovascular disease. The model illustrates the key intervention components (e.g. goal setting and self-monitoring, education, exercise training), targeted outcomes (e.g. physical activity, healthy eating, medication adherence), and theorized mediating variables (e.g. knowledge, beliefs about capability). The article provides an example of how behavioral science frameworks and tools can inform the preparation phase of MOST. The developed conceptual model of digital CR will inform guide decision-making in a future optimization trial.

KINERJA PROTOTIPE RODA PENGGERAK BERSIRIP GANDA PADA LAHAN SAWAH GAMBUT

Agricultural technology to support the agricultural sector, especially peaty paddy fields, should be developed, because peat land with a thickness of less than one meter has been recommended for rice crops. supported by a potential peatland area of ​​up to 21 million Ha or 10.8% of Indonesia's land area. Currently, peatland farming communities use sickles to harvest rice and hoes to cultivate the land. So far, hand tractor finned wheel drive technology has been widely used for cultivating wet paddy fields, whereas in conditions of peaty paddy fields it has not been able to be used because of the high level of sinkage and wheel slip, for this reason a new model of wheel is needed that is capable of working in peaty paddy fields. The aim of the research is firstly to find the right model of driving wheel for use in peaty paddy fields, secondly a prototype driving wheel for peaty paddy fields, and thirdly to experimentally test the driving wheel. Research results (1) prototype with a driving wheel diameter of 35 cm and the number of fins is 8 for the standard fin type and for the double fin type the driving wheel diameter is 40 cm with 4 vertical arc fins, which are placed on the surface of the driving wheel. (2) Comparison with the same type of loading shows that the double fin type drive wheel has a relatively smaller level of wheel loading (around 20%) when compared to the standard type drive wheel. (3) The sinkage level of the standard type drive wheel has a smaller sinkage (around 10%) compared to the double finned wheel type, in tests with the same type of loading. test loads for wheels are 20 kg, 40 kg and 60 kg. The double fin type drive wheel is good for use in peaty paddy fields.

RANCANG BANGUN MODEL PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO (PLTMH) MENGGUNAKAN PADDLE BREAST WHEEL

The need for electrical energy is increasing along with technological advances. In addition to the large population in an area, the variable economic activity of the population, which continues to increase to meet their daily needs, also has an impact on increasing the need for electrical energy. Demand for electrical energy is in line with increased economic activity. Therefore, developing renewable energy to provide sufficient electricity supply is very important. In this research, the modeling of a Micro Hydro Power Plant (PLTMH) has been designed using a breast wheel with a semicircular blade shape, a wheel diameter of 20cm, and 10 blades. The wheel model has 5 variations of water level (head) calculated from the water level in the reservoir to the water level in the wheel with 3 variations of ball valve openings. It was observed that the highest efficiency is at a head height of 0.8 m with a pipe cross-sectional area (A) of 0.0002 m2 with an efficiency of 70.11 percent. The increase in the flow rate of water flowing towards the breast wheel turns out to cause the wheel rotation to decrease. The decrease in the wheel's rotation is related to the increase in turbulence (collision) due to the large discharge of water against the wheels' walls. It can be concluded that the combination of gravity and water propulsion can move the breast wheel so that it produces electrical energy.

Fatigue Crack Propagation Analysis of Rail Surface Under Mixed Initial Crack Patterns

Prolonged rolling contact fatigue between wheels and rails results in the formation of surface cracks on the rail and accurately analyzing the crack expansion behavior is essential to ensuring the safe operation of the train. Drawing upon the principles of fracture mechanics and finite element theory, this study establishes a finite element model of wheel–rail rolling contact that incorporates the presence of cracks. The method utilizes an interaction integral to calculate the stress intensity factors at the leading edge of the crack; then, the Paris formula is used to solve the crack spreading rate. It systematically examines the effects of the initial crack angle, the coefficient of friction of wheels to rails, and crack size on the behavior of fatigue crack propagation. The results indicate that the cracks primarily extend in the depth direction of the rail, transforming the semi-circular surface cracks into elliptical cracks with the major axis oriented along the rail’s width. Crack propagation is primarily driven by model II and III composite crack propagation, with their expansion rates influenced by operating conditions. In contrast, mode-I expansion is less sensitive to these conditions. Under single-variable loading conditions, a smaller initial crack angle results in a faster crack growth rate. Increasing crack length accelerates crack growth, while a higher friction coefficient inhibits it.

Comprehensive Modeling and LQR Control of the Double Wheel on Wheel System

Comprehensive Modeling and LQR Control of the Double Wheel on Wheel System

The impact of sports event platforms on user experience an empirical analysis of tencent sports events

This study focuses on two issues: first, what are the factors that bring different user experiences to viewers on sports event platforms, and second, how should operators of sports event platforms better optimize the user experience of sports event platforms according to the influencing factors of viewers’ experiences. This paper takes the Tencent sports event platform as an example, and takes the technology acceptance model as the basis, introduces the user experience wheel model, and the relevant variables of the information construction theory to construct the user experience model of the sports event platform. conducted an online survey on the viewers of Tencent’s sports platform, and the complete replies of 312 individuals were included in the analysis. The regression model shows that improving service functions effective elements from the user’s perspective and enhancing brand design implementation elements from the perspective of sports event platforms can both have a significant positive impact on user experience, and the impact of service functions effective elements is stronger than that of brand design implementation elements. This study expands the applicability of relevant models and theories, enriching the empirical research system of user experience on sports event platforms. In practice, factors influencing user experience of sports event platforms have been discovered and verified, providing some reference opinions for optimizing platform information architecture, graphic interface design, increasing the commercial value of sports event platform brands, and promoting the sustainable development of the platforms.

Computational and experimental studies of vibration-protective properties of a pneumatic wheel of the MTZ-82 BELARUS tractor with external spring-hydraulic mini-suspension

BACKGROUND: Currently used in various sectors of the national economy, numerous wheeled suspensionless vehicles on pneumatic tires have a low level of vibration protection of the frame and limited cross-country ability. Therefore, the development and study of the design characteristics of a pneumatic wheel with increased elastic-damping properties and cross-country ability is a relevant technical problem. AIM: Development of the design and study the vibration-protective properties of a pneumatic wheel with an external spring-hydraulic mini-suspension to improve the ride smoothness and cross-country ability of large-sized suspensionless vehicles. METHODS: A description of the design of a wheel with mini-suspension and a support roller is presented. The wheel modeling was carried out in the PascalABC software, which takes into account the nonlinearity of the total force of the pneumatic tire and the spring-hydraulic mini-suspension, which is installed parallel to the tire at an angle to the vertical axis of the wheel. The test method consisted of comparison of free and forced vibrations of the rear pneumatic wheel of the MTZ-82 BELARUS tractor with a 400-965/15.5-38 tire, which operated without and with mini-suspension at a vertical load of 0.6 tons and various excessive pressure in the tire. RESULTS: The results of computational and experimental studies show that if the tire is radially compressed by 75 mm, the excess pressure inside the pneumatic wheel almost does not change, and if the pressure in the tire decreases from 1.6 to 0.4 bar, the resonant vibration frequency of the standard wheel axle decreases by 25%, while the dynamic coefficient remains unacceptably high (more than 5), leading to the tire breakaway from the supporting surface. Installing a mini-suspension parallel to the wheel in the form of a spring-hydraulic shock-absorbing strut leads to an increase in the resonant frequency by 1 Hz, however, the resonant peaks are reduced by almost 3 times to a dynamic coefficient of 2.5...2, which significantly increases the ride smoothness of suspensionless vehicles and reduces the likelihood of wheel breakaway from the supporting surface. CONCLUSION: It was found with the studies that the proposed wheel with a mini-suspension as a spring-hydraulic strut and a support roller has a relatively simple design, ensures high vibration-protective properties with small amplitudes of kinematic disturbance and can be used to improve the ride smoothness and cross-country ability of wheeled suspensionless vehicles.

An origami-wheeled robot with variable width and enhanced sand walking versatility

Robots inspired by origami that offer several benefits, including being lightweight, requiring less assembly, and possessing remarkable deformability, have drawn a lot of interest. However, the existing origami-inspired robots are usually of limited functionalities and developing feature-rich robots is very challenging. Here, we report an origami-wheeled robot (OriWheelBot) with exceptional mobility for sand walking and a changing width. Origami wheels created using Miura origami permit the OriWheelBot to alter wheel width over obstacles. We derive the variable-width and diameter analytical models of the origami wheel, assuming rigid-folding, which has been confirmed by testing. An enhanced variant, dubbed iOriWheelBot, is additionally being developed to autonomously determine the obstacle's breadth. Based on the width of the channel between the barriers, three actions will be executed: direct pass, variable width pass, and direct return. Sand-pushing is more suitable for walking on the sand than sand-digging, which is the other of the two motion mechanisms that we have identified. Many aspects of sand walking, including carrying loads, walking on a slope, climbing a slope, and negotiating sand pits, small rocks, and sand traps, have been methodically investigated. The OriWheelBot can climb a 17-degree sand incline, vary its width by 40 %, and have a loading-carrying ratio of 66.7 % on flat sand. Rescue operations in disaster areas and planetary subsurface exploration can benefit from the OriWheelBot.

Numerical Investigation of the Critical Areas of the Freight Train Wheel Web

Abstract This paper aims to investigate the impact of braking with brake blocks on the fatigue lifetime of the train wheel web. Braking generates heat, causing uneven thermal stress and residual stresses as it cools. This can lead to the initiation of fatigue cracks in the wheel web. Therefore, the main issue is the numerical modelling of the railway wheel loaded by mechanical and thermal loads. A complex fatigue investigation is proposed to validate the numerical models and determine critical areas of the wheel web where fatigue cracks can initiate.

Kinematic modeling and control of orthogonal omnidirectional wheeled two-dimensional conveyor platform

This paper proposes an orthogonal omnidirectional wheeled two-dimensional conveyor platform and the inverse kinematic equations based on the cell model and the omnidirectional wheel model are derived, respectively. The two models use the way of the circumcircle of the cargo box and the dot product method to obtain the cell or omnidirectional wheel directly contacted under the cargo box, respectively. This paper uses YOLOV8_OBB and Strong SORT target tracking algorithms to assign tracking IDs to the cargo box and output the box position information. A feedback mechanism for faulty omnidirectional wheels or faulty cells is proposed, where the faulty area is classified as impassable during path planning and the A* path planning algorithm is used for path planning to avoid the faulty area. A visual feedback-based path tracking is adopted to enable timely correction when the cargo box deviates from the established path. The experimental results show that the omnidirectional wheel-based model improves the path-tracking accuracy by 44.52% and reduces the average power consumption by 2.6 times compared to the cell-based model.

Locomotion Control of a Bipedal Wheeled Robot Using Virtual Model Control and Linear Quadratic Regulator Techniques

This paper aims to develop a balance control technique and investigates its impact on the stability and disturbance rejection capability of a bipedal wheeled robot. The bipedal wheeled robot is equivalent to a wheeled inverted pendulum nonlinear model with a legs-airframe centroid variable rod. The nonlinear model is linearized and decoupled into two subsystems: straight-line control using linear-quadratic regulator (LQR) for balance and speed, and steering control employing proportional integral derivative (PID). Height control adjusts the virtual force with PID-Feedforward, while hip torque is determined by virtual model control (VMC). MATLAB simulation confirms effective control of height, linear motion, and steering, with decoupling enhancing steering performance.

DEM modelling of surface indentations caused by granular materials: application to wheel–rail sanding

The presented surface indentation model is one step towards building a DEM model for wheel–rail sanding. In railways, so-called low-adhesion conditions can cause problems in traction and braking, and sanding is used to overcome this problem. Sand grains are blasted towards wheel–rail contact, fracture repeatedly as they enter the nip and are drawn into the contact and then increase adhesion. Research on this topic has mostly been experimental, but focussed on adhesion enhancement measurement. Thus, physical mechanisms increasing the adhesion are not well understood. Previous works involved experiments and DEM modelling of single sand grain crushing tests under realistic wheel–rail contact pressures of 900 MPa, focusing on sand fragment spread and formation of clusters of solidified fragments. In the experiments, indents in the compressing steel plates were also observed, which are also observed on wheel and rail surfaces in railway operation. These are now modelled by adapting an existing surface indentation model from literature to the case of surface indentations caused by granular materials. Two test cases are studied, and experimental spherical indentation tests for model parametrisation are presented. In a proof of concept, the mentioned single sand grain crushing tests under 900 MPa pressure are simulated including the surface indentation model. This work contributes to DEM modelling of wheel–rail sanding, which is believed to be a good approach to deepen the understanding of adhesion increasing mechanisms under sanded conditions.

Unravelling interacting barriers and facilitators to adherence and delivery of exercise-based care in the treatment of Subacromial Pain Syndrome – an exploratory qualitative study

Purpose Subacromial Pain Syndrome (SAPS) is a common persistent pain condition. Exercise-based care is first-line recommendation, but an insufficient exercise dose hampers effectiveness. This study explores individual and contextual barriers and facilitators for delivery of and adherence to exercise-based care in people with SAPS. Materials and Methods Participants in this exploratory qualitative study were involved in the management of SAPS in Denmark. Triangular interviews and analyses were conducted within 3 themes (delivery of recommended services, adherence to recommendations, and frames of the clinical pathways) using the Theoretical Domains Framework (TDF) and the Behavioural Change Wheel model (BCW) to map barriers and facilitators into the Capability, Opportunity, Motivation and Behaviour (COM-B) model. Results From interviews with 10 persons with SAPS and 37 healthcare practitioners and double-deductive analyses, 30 subjects of target behaviour within 13 TDF domains emerged across perspectives and COM-B components. Central barriers to delivery and adherence were inconsistencies in diagnostic terminology, cross-professional disagreements, beliefs, and expectations towards pathway services. Conclusion We identified interrelated individual and contextual barriers to delivery and adherence across all aspects of the BCW, underpinning the complexity of the subject. Findings support that effectiveness of exercise-based care is linked to contextual barriers to delivery and adherence.

Numerical analysis of the mechanics of foreign particle entry on automotive turbocharger compressor blades

Automotive turbochargers, essential for enhancing intake air pressure and boosting torque in internal combustion engines, operate at exceptionally high rotational speeds of approximately 100,000 to 300,000 rpm. Despite the implementation of dual or triple air filtration systems to filter contaminants, neglected maintenance can lead to clogged filters, resulting in the ingestion of metallic filter mesh, and other small-sized objects from filter indicators, washers, and plastic components into the turbocharger assembly. The current study explores the impact of foreign particles on the mechanics of turbocompressor impeller blades in automotive turbochargers through a computational approach. A finite element model of the turbocompressor wheel was developed with suitable boundary conditions for the turbocompressor and the foreign particle. A Design of Experiments (DoE) approach was employed using a Taguchi L12 orthogonal array to optimize the multiple parameters during the foreign particle impact. The study considered two geometric shapes of the foreign particle (conical with unit aspect ratio and hemispherical), two sizes, and two rotational speeds ranging from 150,000 to 250,000 rpm. ANSYS Explicit Dynamics® software was utilized for the numerical simulations to simulate the mechanics of foreign particle entry and the resulting damage on compressor blades.

Numerical Prediction of Ride Comfort of Tracked Vehicle Equipped with Novel Flexible Road Wheels

Enhancing ride comfort has always constituted a crucial focus in the design and research of modern tracked vehicles, heavily reliant on the driving system’s performance. While the road wheel is a key component of the driving system, traditional road wheels predominantly adopt a solid structure, exhibiting subpar adhesion performance and damping effects, thereby falling short of meeting the demands for high-speed, stable, and long-distance driving in tracked vehicles. Addressing this issue, this paper proposes a novel type of flexible road wheel (FRW) characterized by a catenary construction. The study investigates the ride comfort of tracked vehicles equipped with flexible road wheels by integrating finite element and vehicle dynamic. First, three-dimensional (3D) finite element (FE) models of both flexible and rigid road wheels are established, considering material and contact nonlinearities. These models are validated through a wheel radial loading test. Based on the validated FE model, the paper uncovers the relationship between load and radial deformation of the road wheel, forming the basis for a nonlinear mathematical model. Subsequently, a half-car model of a tracked vehicle with seven degrees of freedom is established using Newton’s second law. A random road model, considering the track effect and employing white noise, is constructed. The study concludes by examining the ride comfort of tracked vehicles equipped with flexible and rigid road wheels under various speeds and road grades. The results demonstrate that, in comparison to the rigid road wheel (RRW), the flexible road wheel enhances the ride comfort of tracked vehicles on randomly uneven roads. This research provides a theoretical foundation for the implementation of flexible road wheels in tracked vehicles.

Research on Sintering Machine Axle Fault Detection Based on Wheel Swing Characteristics

During the sintering process in iron production, wheel swing is a sign of sintering machine trolley axle faults, which may lead to the wheel falling off and affect the production operation of the sintering machine system in serious cases. To solve this problem, this paper proposes a fault detection and localization method based on the You Only Look Once version 9 (YOLOv9) object detection algorithm and frame difference method for detecting sintering machine trolley wheel swing. The wheel images transmitted from the camera were sent to a trolley wheel and side panel number detection model that was trained on YOLOv9 for recognition. The wheel recognition boxes of the previous and subsequent frames were fused into the wheel region of interest. In the wheel region of interest, the difference operation was carried out. The result of the difference operation was compared with the preset threshold to determine whether the trolley wheel swings. When a wheel swing fault occurs, the image of the side plate at the time of the fault is collected, and the number on the side plate is identified so as to accurately locate the faulty trolley and to assist the field personnel in troubleshooting the fault. The experimental results show that this method can detect wheel swing faults in the industrial field, and the detection accuracy of wheel swing faults was 93.33%. The trolley side plate numbers’ average precision was 99.2% in fault localization. Utilizing the aforementioned method to construct a system for detecting wheel swing can provide technical support for fault detection of the trolley axle on the sintering machine.

Force model of ultrasonic empowered minimum quantity lubrication grinding CFRP

As a weight-reducing material in aerospace applications, carbon fiber reinforced polymer (CFRP) requires precision grinding to ensure the accuracy and assembly of mating positioning surfaces. However, achieving low-damage machining of CFRPs remains challenging. Flood cooling reduces the mechanical properties, while dry grinding deteriorates the surface integrity, making minimum quantity lubrication (MQL) a viable alternative. However, nanolubricants struggle to penetrate the grinding area due to gas barrier obstruction. Consequently, a new CFRP grinding approach using multiangle 2D ultrasonic vibration-empowered nanolubricant MQL was proposed. An analytical force model is crucial for optimizing machining strategies and adjusting parameters. The aim is to reveal grinding mechanics and develop a force model under different ultrasonic and lubrication-cooling conditions. First, a uniform random fiber distribution model and a grinding wheel model were established, and the mechanical properties of the interface were predicted. Then, the intermittent grinding behavior and dynamic stiffnesses of the multiangle 2D ultrasonic vibration-assisted grinding (UVAG) system were investigated based on the geometric kinematics of the grains' trajectory. Furthermore, based on the deformation deflection curve, bending fracture force models for 45°, 90°, and 135° fibers were established with different contact and boundary conditions. The material removal mechanisms of shear and tension-compression buckling in 0° CFRP grinding were revealed, and an elliptical contact normal force model was established. The interlayer shear in 45° CFRPs was analyzed. The longitudinal compressive matrix cracking and fiber shear fracture in the 90° CFRPs were elucidated. Fiber microbuckling and fiber bundle removal of 135° CFRPs were investigated. Finally, grinding force models with different fiber orientation angles (FOAs) were interconnected and experimentally assessed. Experimental assessments demonstrated that the grinding force model has acceptable estimation error and effectively captures the mechanics of CFRPs with different FOAs.