Contact Points Research Articles

Problems and corrections of classical mathematical model for piecewise linear system

Due to the existence of gaps or backlash, many mechanical systems can be simplified into piecewise linear models. The dynamic study on mechanical systems should be based on reliable mathematical models. So that it is very important to determine the contact point and separation point between the primary system and the auxiliary spring system (ASS) in a piecewise linear system. In most existing literature, the contact point and separation point of the mathematical model are fixed at the gap. But in this paper, it is found that the contact point and separation point actually change with the system parameters when the ASS contains a damper, which implies the most existing mathematical models are incorrect. It is firstly demonstrated through numerical solution that the primary system will prematurely separate from the ASS before reaching the gap under harmonic excitation, which shows the incorrectness of the classical mathematical models. Then, based on the mechanical model and engineering practice, two corrected mathematical models are proposed. And the motions of the primary system and ASS after premature separation in the corrected models are studied. Finally, through comparisons of the contact points, separation points, amplitude-frequency curves and motion states between the corrected models and the classical mathematical model, it can be concluded that the corrected models are more reasonable. And comparisons with the experimental data imply that the corrected models can better reflect the engineering practice. These results will be helpful to the study and design of the piecewise linear system.

Impact of cocoa variety on physical and chemical properties, reconstitutability, and flowability of cocoa powders

Cocoa of the Criollo, Forastero, and Trinitario varieties grown in the same production area of the Republic of the Congo were simultaneously harvested and similar post-harvesting operations (fermentation in crates followed by sun-drying) were performed. Cocoa powders were then produced according the same process consisting in successive roasting, grinding, fat extraction by pressing, and ultrafine grinding of the defatted mass. In order to investigate the influence of cocoa variety, the main physical and chemical properties (proximate composition, pH, particle size and shape distributions) of powders were characterized and related to cocoa powders abilities to reconstitute and flow. The three varieties showed very close proximal compositions, with lipid contents varying between 21 and 23 % (w/w), which classifies them as defatted cocoa powders. Cocoa powders of all varieties were non-wettable, and not soluble (solubility index around 0.15 g/g), consistently with their high lipid content. The fatty, fibrous, and proteic nature of the product has an impact on the grinding process, resulting in non-wettable powders and particles of varying sizes and shapes. All powders had bimodal particle size distributions, with large particles around 500 μm and small ones around 25 μm. However, slight differences between varieties were observed for some shape and functional properties. Trinitario and Forastero cocoa particles were slightly less spherical. The Criollo cocoa powder was relatively more compressible than the Trinitario variety. No significant difference of flow properties was attributable to cocoa variety. Basic flowability energy of all cocoa powders were relatively high, ranging from 908 to 973 mJ, which could denote a low aptitude to flow that may be related to the probable softness and stickiness of particle surface due to the high lipid content of cocoa powders. Specific energy values required to make studied cocoa powders flow were in the range between 6.61 and 6.99 mJ/g, which corresponds to intermediate values indicating a moderate level of cohesion and thus a fair flowability. The flow parameters obtained from the shear cell test showed no significant difference of cohesion (comprised between 1.54 and 1.70 kPa), flow factor (ranging from 2.53 to 2.76), and internal angle of friction (between 33.4 and 33.9°) linked to cocoa variety. This may be explained by the impact of particle size, as higher particles are generally less cohesive due to their lower surface specific area implying less interparticular contact points. Apart from these slight differences, all varieties showed similar properties and thus could be blended instead of being sorted in the cocoa manufacturing process. This study permitted to highlight that the terroir, the method of harvesting and preparing the beans, and then producing the powder have probably more impact on the physical and chemical and functional properties of cocoa powders than their variety.

Advances in Wafer Probing with Ultra-Short Pitch SoCs

The semiconductor industry is in a constant state of evolution, driven by the relentless pursuit of improved performance, enhanced efficiency, and the ever-decreasing size of electronic devices. A critical aspect of this advancement is the development of ultra-short pitch system-on-chips (SoCs). These SoCs, characterized by their densely packed connections and minimal spacing between contact points, present unique challenges during wafer probing—a crucial step in semiconductor manufacturing. This article delves into the complexities of wafer testing for short pitch SoCs, explores the latest innovations in this domain, and discusses how these advancements are revolutionizing semiconductor manufacturing processes.

Functional outcomes and participants’ perspectives during short-term application of spinal stimulation in individuals with spinal cord injury

Objective The primary objective of this study was to quantify changes in performance of task-specific motor activities over 12 motor rehabilitation sessions with lumbosacral spinal cord stimulation (SCS) via either transcutaneous stimulation or epidural stimulation. Both stimulation modalities have been used in recent years to restore functions lost to spinal cord injury (SCI). Secondary outcomes examine participants’ perspectives captured via the User Experience Questionnaire (UEQ) upon study completion to further understand their perception of SCS. Methods Six individuals with SCI completed 12 sessions with one modality of SCS during supine and/or side-lying, seated forward reaching, and standing activities. Changes in volitional lower extremity movement, the number of points of contact needed at hips and/or knees to facilitate standing, and changes in seated forward reaching distance were used to quantify performance. The UEQ was administered to gauge participants’ perspectives following use of SCS to enable functions impaired due to SCI. Results For all participants, performance of motor activities improved with SCS compared to without stimulation. Responses for the UEQ showed an overall positive perception of trialing SCS with rehabilitation to enhance motor functions impaired by SCI. Conclusions Regardless of injury severity, location of injury, time since SCI, or SCS modality, all participants experienced gains in motor function in the presence of SCS combined with a condensed rehabilitation program. However, no evidence of sustained motor functions was found in the absence of SCS. UEQ results highlight the positive perception of SCS with rehabilitation as well as the importance of consulting persons with lived experience of SCS during clinical trial design and protocol development. Trial registration: ClinicalTrials.gov identifier: NCT05095454.

DESAM-ForNet Portal: A Novel Infrastructure to Integrate Distributed Information from Practice-Based Research Networks in the German Healthcare System.

Currently the German healthcare system does not have a generic structure to answer research questions in primary care through clinical studies. The DESAM-ForNet initiative was founded as an association of German Practice-Based Research Networks (PBRN), to propose an appropriate and feasible solution. Aim is the integration of distributed, consensual information from practices into a single point of contact. To this end, a consensus-based concept for a digital infrastructure was developed in cooperation with all partners involved. Based on a joint requirements analysis the new concept integrates the federal structure of the German health system and the existing research structures.

Forced vibrations of an elastic triangular plate supported around its perimeter by a unilateral support via the Chebyshev polynomial expansion

The present study introduces static and dynamic analysis of an elastic triangular plate on unilateral edge supports, including forced vibrations due to loading and unloading excitation. The plate is assumed to be subjected to a uniformly distributed load and an eccentrically applied concentrated load. Furthermore, the loads are assumed to display dynamic variations. The governing equation of the problem is derived by considering the static and the dynamic responses of the plate by including inertia forces. The analytical solution is conducted by employing a series of Chebyshev polynomials for the admissible displacement functions and using Lagrange’s equations of motion. Having found the governing equation of the problem, an approximate numerical solution is accomplished using an iterative process due to the non-linear properties of the unilateral edge supports. The static behavior of the plate under a concentrated load is investigated in detail numerically by considering a wide range of parameters of the plate geometry and the stiffness of the support. In deriving the governing equation of the problem and in the numerical solution, special care is taken to use nondimensional parameters. This approach ensures that the analysis and conclusions remain valid across a wide range of parameter values. Dynamic treatment of the problem is carried out in the time domain by assuming a stepwise time variation of the concentrated load and by employing the constant acceleration procedure in the numerical solution of the system of governing differential equations derived from the equation of motion. Time variations of the displacements, the contact points, and the reactions of the plate’s support are presented in figures for various values of the parameters of the plate, as well as those of the supports, particularly focusing on the non-linearity of the problem due to the plate liftoff from the unilateral support. The effects of the parameters and the loading are investigated in detail. The results reveal that the unilateral property of the support stiffness significantly affects the static and dynamic behavior of the triangular plate. The analysis can be extended easily to cover a general type of loading as well. The main issues addressed in this study include: the analysis of a triangular plate with unilateral perimeter support that does not resist tensile forces; the use of Chebyshev polynomials as admissible functions in both directions; the consideration of static and dynamic loads; the determination of lifting areas of the support in both cases and the assessment of the global vertical force balance in the plate, including inertia forces in the dynamic case.

High Responsibility, limited authority, and endless expectations: a policy critique of the Community Health Officer’s role in the government healthcare delivery systems in India

BackgroundThe shortage of qualified healthcare providers in rural areas of India has led to a emergence informal and unqualified practitioners and poses significant risks to population health. Community Health Officers (CHOs) were introduced as mid-level health providers (MLHP) at Sub-health Centres (SHC) to bridge the healthcare resource gap and serve as the primary point of contact for rural communities.MethodsThis qualitative cross-sectional study aimed to explore the CHOs experiences and performance at sub-health centre Health and Wellness Centres (SHC-HWCs) in India. CHOs and Medical Officers (MOs) from randomly selected SHC-HWCs and Primary Health Centre-Health and Wellness Centres (PHC-HWCs) across different geographic zones were interviewed. Semi-structured interviews were conducted with CHOs, MOs, and State Nodal Officers (SNOs) to gather information on drug provisioning, prescription practices, and perspectives on the roles and capacities of CHOs. The study is based on 40 in-depth interviews of health providers sampled at different levels of healthcare system in India.ResultsThe study revealed barriers and challenges faced by CHOs in meeting the expectations outlined in the Comprehensive Primary Health Care (CPHC) guidelines. These included a lack of agency, difficulties in team dynamics with existing healthcare professionals, and inadequate availability of medicines at sub-health centres. Due to the existing contradictions and prescription restrictions, CHOs found themselves failing to meet community expectations and foster trust.ConclusionCHOs encounter significant challenges in fulfilling their roles as mid-level health providers. Addressing these challenges is crucial for optimizing their effectiveness and strengthening the delivery of primary healthcare in rural areas. Clear protocols, supportive policies, and capacity-building initiatives are necessary to enhance the role and impact of CHOs in the healthcare system.

Continuous optimization method of micro geometry for unparallel beveloid gears

To enhance the bearing capacity and minimize the loaded transmission error for unparallel beveloid gears, a continuous optimization method of micro geometry is proposed. Considering that the conjugate characteristic of tooth surfaces is destroyed by misalignments and modification, an unload contact analysis model is first developed. This includes a contact tooth sequence determination model and an unloaded transmission error calculation model for multi-tooth contact. To determine contact due to deformation, a potential contact point matching model of non-contact tooth surfaces is introduced. Further, a numerical loaded contact analysis model based on the influence coefficient method for unparallel beveloid gear is developed. For multi-tooth contact of modified tooth surfaces, the transmission error compatibility condition is introduced. Based on the loaded contact model, a continuous optimization model for the comprehensive performance of contact pressures and loaded transmission error within a meshing cycle is established. To improve optimization efficiency, a calculation strategy for continuous optimization is developed. The feasibility of the proposed method is validated using a numerical example.

Design of a Trailer Adapted for Accommodation and Transport of Beehives

There is relevant interest concerning beehives, taking into account climate change and its influence on bees’ behavior. A part of the industrial engineering sector is focusing on beekeeping applications. More specifically, the present study aims to develop a trailer for the transport of beehives adapted to be placed or fixed to a tractor or a vehicle trailer, with the objective of transporting the beehives safely and stably during transhumance. The proposed novel design relates to a trailer that incorporates a device for housing a rectangular section of the beehives, which can be adapted for fixing or housing in a vehicle or in a vehicle trailer. The device comprises a lower support structure, adapted to support a plurality of rectangular sections of beehives stacked horizontally on the lower structure, an upper frame adapted to house the beehives inside, and two or more connecting elements between the lower structure and the upper frame. The connection of the trailer with the device facilitates the loading and unloading of the beehives by mechanical means. The different parts have been designed as individual pieces and then assembly is carried out to achieve the complete design. This method of implementation is because the simulation of individual components is simpler and easier, since if it is carried out through assembly, the type of joint, such as welding, and the length of the weld would have to be indicated at each point of contact between components, along with its thickness and all the necessary parameters. Therefore, in those welding points, fixed fastenings are indicated and so will simplify it. In accordance with the individual creation of each part, its own load simulation has been carried out. Static analyses are performed taking into account structural elements of this proposed design, with restrictions and loads being established. The analysis, including upper bars and supports, has been completed with several situations. Based on stress values, deformations have been determined and calculations evaluated. The trays have been manufactured using flat steel bars and angled bars for the legs and support of the hives.

Australian SLPs’ knowledge and actions regarding the early signs of autism: When does caution become gatekeeping?

Purpose Speech-language pathologists (SLPs) are often the first point of contact for families of children with autism. Despite this, little is known about SLPs’ understanding of autism and its early indicators. This study sought to investigate what Australian SLPs know about autism, the early indicators, and the actions they take when they identify these characteristics. Method A 34 question cross-sectional online survey was distributed through professional networks, social media channels, and industry contacts to Australian SLPs. Quantitative and qualitative data were analysed. Result The 70 participants worked in various contexts around the country. The majority of participants demonstrated sound knowledge of the main characteristics of autism, and some early indicators. Quantitative analysis identified a significant correlation between participant age and confidence talking to parents about possible autism. Overarching themes were identified: (a) caution may delay or prevent SLPs from taking action, (b) some factors may influence SLPs’ action, and (c) SLPs take action. Conclusion Australian SLPs working with children have the knowledge and understanding of the main characteristics of autism and some early indicators. However, they demonstrate a cautious approach around the subject of autism, and this caution may cause delays for children requiring diagnostic services.

Starfish-inspired ultrasensitive piezoresistive pressure sensor with an ultra-wide detection range for healthcare and intelligent production

Flexible pressure sensors have attracted significant attention due to their wide range of applications in various fields (e.g., robotis, healthcare, and human–machine interfaces). However, achieving both high sensitivity and a wide detection range remains a challenge. Here, we propose a novel starfish-inspired ultrasensitive piezoresistive pressure sensor capable of detecting an extensive range of pressures. The sensor’s design incorporates high and low spine structures inspired by the surface of a starfish, efficiently preventing rapid saturation of detection range and expanding the response range. Unlike single-material nanofiber structures, the ultrathin and ultrasensitive layer, fabricated using PEDOT: PSS/TPU nanofibers, possesses a large surface area ratio and numerous contact points. This allows for a quick increase in conductive channels when pressure is applied. The intertwining of PEDOT: PSS fibers with TPU fibers enhances both the mechanical strength of the fiber membrane and the initial resistance of the sensor, thereby increasing its sensitivity. Additionally, PVA fibers are fabricated over the interdigital electrode to serve as insulation layer for controlling resistance change between the sensitive layer and the electrode. Importantly, the interaction between the PVA fibers and the PEDOT: PSS/TPU fibers alters the deformation behavior of the sensitive layer fibers, further enhancing the performance of the sensor. The fabricated sensor demonstrates exceptional sensitivity (302.9 kPa−1), an extensive detection range of 0–426.7 kPa, and remarkable endurance of over 7,000 cycles at 110 kPa, rendering it a device with great potential for precise pressure sensing applications in health monitoring and intelligent production.

Assessment of physicians’ knowledge, thoughts, and attitudes regarding the phytovigilance system

ABSTRACT Background In this study, physicians’ awareness of phytovigilance and their knowledge of safety processes for herbal products were evaluated for the first time in Türkiye. Research design and methods A descriptive quantitative study was conducted using face-to-face interview techniques with physicians working in a training and research hospital in Türkiye. A total of 268 (35.2%) questionnaires with appropriate data quality were analyzed with IBM SPSS Statistics 23.0. The factors that had the strongest effect on phytovigilance awareness were determined by binary logistic regression analysis. Values of p < 0.05 were accepted as statistically significant. Results The survey results revealed that 45.5% of physicians were aware of the concept of phytovigilance. Physicians who knew that adverse effects were reported due to the use of herbal products, physicians who asked about the use of herbal products while taking their patients’ medical history, and specialist physicians had higher awareness of the concept of phytovigilance. Only 30.2% of participants were aware that feedback on adverse reactions from herbal products was being collected and only 27.2% were aware that there was a phytovigilance contact point in the hospital. Conclusion The awareness of physicians regarding phytovigilance should be increased. Physicians should ask about the use of herbal products while taking medical history, identify possible adverse effects associated with herbal products, and provide feedback.

Reproductive character displacement: insights from genital morphometrics in damselfly hybrid zones.

Reproductive Character Displacement (RCD) refers to the phenomenon of greater differences in reproductive characters between two species when they occur in sympatry compared to when they occur in allopatry to prevent maladaptive hybridization. We explored whether reinforcement of a mechanical barrier involved in the first contact point between male and female genital traits during copulation in the cross between Ischnura graellsii males and Ischnura elegans females has led to RCD, and whether it supports the lock-and-key hypothesis of genital evolution. We employed geometric morphometrics to analyze the shape and size of male and female genital traits, controlling for environmental and geographic factors. Consistent with an increase in mechanical isolation via reinforcement, we detected larger divergence in genital traits between the species in sympatry than in allopatry, and also stronger signal in females than in males. In the Northwest (NW) hybrid zone, we detected RCD in I. graellsii males and I. elegans females, while in the Northcentral (NC) hybrid zone we detected RCD only in I. elegans females and I. elegans males. The detection of RCD in both sexes of I. elegans was consistent with the lock-and-key hypothesis of genital evolution via female choice for conspecific males in this species. Our study highlights the importance of using geometric morphometrics to deal with the complexity of female reproductive structures while controlling for environmental and geographic factors to investigate RCD. This study contributes valuable insights into the dynamics of reproductive isolation mechanisms and genital coevolution.

Discrete mechanical model for nonlinear dynamical analysis of planar guyed towers considering the unilateral contact of cables

Towers are widely used for power line transmission, wind power plants, TV and radio broadcasting, and telecommunications. To enhance their stability, cables are often employed to anchor these towers to the ground. In this study, we investigate the nonlinear static and dynamic responses of a planar guyed tower in which the unilateral constraints on the cables are considered. A representative discrete mechanical model with two degrees of freedom is developed to simulate the central mast of the tower, and the cables are modeled as unilateral springs with linear stiffness. The nonlinear equilibrium equations are derived using an energy approach that incorporates the dissipative forces, total potential, and kinetic energies into the Euler-Lagrange equations. Unilateral cable contact is directly included in the nonlinear equilibrium equation for the guyed tower, allowing for numerical analysis without the need to evaluate the contact point at each time or load step. Several numerical strategies are employed to obtain nonlinear static equilibrium paths, bifurcation diagrams, phase portraits, and Poincaré sections. Our analyses provide novel results for the influence of unilateral cable contact in nonlinear static and dynamic analysis, evaluating the effects of unilateral contact and prestressing on the results. A parametric analysis reveals that cable contact affects nonlinear oscillations, bifurcation, and stability. Our numerical results indicate that unilateral cable contact introduces less structural stiffness compared to bilateral contact, thereby significantly affecting the static and dynamic stability of a planar guyed tower. This is evidenced by a decrease in the static limit load and alterations in the bifurcation diagrams, where unilateral contact destroys the trivial solutions, leading to periodic and quasi-periodic solutions at low levels of vertical load.

Digital Guardians: The Role of Technology in Preventing Adverse Drug Events in Community Pharmacies

These adverse drug events, also known as ADEs, are a major cause for concern in the healthcare industry since they are a contributor to morbidity, mortality, and increased healthcare expenditures. Community pharmacies, which serve as the primary point of contact for a large number of patients, play an essential part in the process of identifying and preventing adverse drug reactions (ADEs). The implementation of technology in these contexts presents a number of interesting options that have the potential to improve patient safety and drug management capabilities. Within the context of community pharmacy, this research investigates the impact that various technological improvements have had on the prevention and monitoring of adverse drug reactions (ADEs). Telepharmacy, clinical decision support systems (CDSS), automated dispensing systems, and electronic health records (EHRs) are some of the key technologies that are mentioned. Through this analysis, the benefits, challenges, and future directions of technology-driven pharmacovigilance in community pharmacies are highlighted. Additionally, the review emphasises the necessity of continuous innovation and adaptation in order to enhance patient outcomes and the efficiency of healthcare.

Contacts with health services for COVID-19-related reasons during the first wave of the pandemic in Portugal: a longitudinal study

IntroductionAccess to COVID-19-related care during the pandemic deserve attention and study to inform future strategies to deal with similar health emergencies in the future. We aimed to describe access to...

Unusual Quasiparticles and Tunneling Conductance in Quantum Point Contacts in ν=2/3 Fractional Quantum Hall Systems.

Understanding topological matter in the fractional quantum Hall (FQH) effect requires identifying the nature of edge state quasiparticles. FQH edge state at the filling factor ν=2/3 in the spin-polarized and unpolarized phases is represented by the two modes of composite fermions (CF) with the parallel or opposite spins described by the chiral Luttinger liquids. Tunneling through a quantum point contact (QPC) between different or similar spin phases is solved exactly. With the increase of the applied voltage, the QPC conductance grows from zero and saturates at e^{2}/2h while a weak electron tunneling between the edge modes with the same spin transforms into a backscattering carried by the charge q=e/2 quasiparticles. These unusual quasiparticles and conductance plateau emerge when one or two CF spin-polarized modes in the QPC tunnel into a single mode. We propose experiments on the applied voltage and temperature dependence of the QPC conductance and noise that can shed light on the nature of edge states and FQH transport.

Construction of superhydrophobic composite coating on AZ31B Mg alloy for improved corrosion resistance and anti-wear property

In this study, the EP (epoxy)/L(P) (layered double hydroxides powder)-DTMS (dodecyl-trimethoxy-silane) superhydrophobic composite coating was prepared on AZ31B Magnesium (Mg) alloy surface by spin-coating and self-assembly methods. Mg-Al layered double hydroxides (LDH) powder with ion exchange ability, prepared by hydrothermal coprecipitation, was mixed with EP to construct rough surface and provide good adhesion between the coating and Mg alloy substrate. The introduction of DTMS could reduce the surface energy of coating and improve the compactness of rough surface. Due to the shielding effect of superhydrophobic surface and the ion exchange ability of LDH, it was difficult for corrosive ions (Cl-) to reach the substrate surface in 3.5 wt% NaCl solution. And the corrosion current density was decreased by 4 orders of magnitude. Because of the lubrication of DTMS and the layered structure of L(P), the composite coating had a good wear-reducing effect under the reciprocating point contact mode against with an AISI5200 steel ball. It provided a feasible idea for the construction of multifunctional superhydrophobic coatings on metal surface with self-cleaning, corrosion resistance and wear resistance, which will expand the industrial application fields of superhydrophobic coatings.

The Interplay between Airway Cilia and Coronavirus Infection, Implications for Prevention and Control of Airway Viral Infections.

Coronaviruses (CoVs) are a class of respiratory viruses with the potential to cause severe respiratory diseases by infecting cells of the upper respiratory tract, bronchial epithelium, and lung. The airway cilia are distributed on the surface of respiratory epithelial cells, forming the first point of contact between the host and the inhaled coronaviruses. The function of the airway cilia is to oscillate and sense, thereby defending against and removing pathogens to maintain the cleanliness and patency of the respiratory tract. Following infection of the respiratory tract, coronaviruses exploit the cilia to invade and replicate in epithelial cells while also damaging the cilia to facilitate the spread and exacerbation of respiratory diseases. It is therefore imperative to investigate the interactions between coronaviruses and respiratory cilia, as well as to elucidate the functional mechanism of respiratory cilia following coronavirus invasion, in order to develop effective strategies for the prevention and treatment of respiratory viral infections. This review commences with an overview of the fundamental characteristics of airway cilia, and then, based on the interplay between airway cilia and coronavirus infection, we propose that ciliary protection and restoration may represent potential therapeutic approaches in emerging and re-emerging coronavirus pandemics.

How GPs can help young people avoid future self-harm: a qualitative study.

Self-harm is a growing problem in young people. GPs are usually the first point of healthcare contact for young people aged 16-25 years, after self-harm. GPs can experience barriers to supporting young people and behaviour change theory can help to understand these, and the influences on, GP behaviour. To explore the capabilities, opportunities, and motivations (COM-B model of behaviour) of GPs, and their perceived training needs, to help young people aged 16-25 years avoid future self-harm. This was a qualitative study of GPs in England. Semi-structured interviews were conducted with NHS GPs who were purposively sampled. Interviews occurred in 2021. Data were analysed using reflexive thematic analysis and mapped onto the COM-B model domains. The study's patient and public involvement group supported data analysis. Fifteen interviews were completed. Four themes were generated. GPs described mixed capabilities, with many feeling they had the physical and psychological skills to support young people to avoid future self-harm, but some felt doing so was emotionally tiring. GPs identified opportunities to better support young people, such as use of electronic consultation tools, but cited lack of time as a concern. GPs reported motivation to help young people, but this can be influenced by their workload. Unmet training needs around communication, knowledge, and optimising safety were identified. GPs are supported by their practice teams to support young people after self-harm, but a lack of time hinders opportunities to do so. Future effective GP-led interventions may improve GP motivation to support young people after self-harm.