Design Process Research Articles

Addressing metallosis in knee arthroplasty: From diagnostic challenges to innovative treatments

In this editorial, we comment on the article by Toro et al published in the recent issue of World Journal of Orthopedics . This editorial review provides a comprehensive exploration of the landscape surrounding knee arthroplasty metallosis, focusing on key aspects ranging from the mechanisms influencing susceptibility to clinical implications and advanced treatment strategies. We elucidate the complex interplay of implant design, patient-specific variables, and wear-related processes contributing to metallosis. Furthermore, we seek to shed light on diagnostic challenges, the necessity of a multidisciplinary approach, and the imperative for vigilant implant surveillance. Uni-on-uni revision, as a targeted treatment modality, is discussed, highlighting its potential to address metallosis in unicompartmental knee arthroplasty (UKA). There is a need for heightened awareness among clinicians regarding the subtle presentations of metallosis, coupled with the limitations of traditional imaging techniques. Addressing metallosis requires a collaborative, multidisciplinary approach to effectively navigate the complexities associated with this complication. Furthermore, the review emphasizes the evolving paradigm of personalized care, with uni-on-uni revision emerging as a promising surgical solution. In conclusion, the editorial outlines the dynamic nature of knee arthroplasty metallosis and its multifaceted impact on clinical practice. It calls for ongoing collaboration, education, and integration of innovative solutions to enhance diagnostic accuracy, proactive management, and overall patient outcomes in the realm of UKA.

Co-designing Entrustable Professional Activities in General Practitioner's training: a participatory research study.

In medical education, Entrustable Professional Activities (EPAs) have been gaining momentum for the last decade. Such novel educational interventions necessitate accommodating competing needs, those of curriculum designers, and those of users in practice, in order to be successfully implemented. We employed a participatory research design, engaging diverse stakeholders in designing an EPA framework. This iterative approach allowed for continuous refinement, shaping a comprehensive blueprintcomprising 60 EPAs. Our approach involved two iterative cycles. In the first cycle, we utilized a modified-Delphi methodology with clinical competence committee (CCC) members, asking them whether each EPA should be included. In the second cycle, we used semi-structured interviews with General Practitioner (GP) trainers and trainees to explore their perceptions about the framework and refine it accordingly. During the first cycle, 14 CCC members agreed that all the 60 EPAs should be included in the framework. Regarding the formulation of each EPAs, 20 comments were given and 16 adaptations were made to enhance clarity. In the second cycle, the semi-structured interviews with trainers and trainees echoed the same findings, emphasizing the need of the EPA framework for improving workplace-based assessment, and its relevance to real-world clinical scenarios. However, trainees and trainers expressed concerns regarding implementation challenges, such as the large number of EPAs to be assessed, and perception of EPAs as potentially high-stakes. Accommodating competing stakeholders' needs during the design process can significantly enhance the EPA implementation. Recognizing users as experts in their own experiences empowers them, enabling a priori identification of implementation barriers and potential pitfalls. By embracing a collaborative approach, wherein diverse stakeholders contribute their unique viewpoints, we can only create effective educational interventions to complex assessment challenges.

“Are You Sure About That?”: Handling Uncertainty in an Early-Stage Ship Design Process

“Are You Sure About That?”: Handling Uncertainty in an Early-Stage Ship Design Process

Exploring primary school teachers’ idea generation during the STEM instructional design process

ABSTRACT Background Instructional design is essential for the implementation and quality of STEM education. However, it remains challenging to help teachers acquire pedagogical content knowledge and come up with novel instructional design ideas in STEM. education. Purpose Guided by the full-perspective learning theory, this study proposed a conceptual model that was constructed by teaching needs assessment (TNA), internal meditation (IM), external interaction (EI), and idea generation in instructional design (IGID). Sample A total of 1,727 primary school technology teachers (51.8% female, 48.2% male) who had conducted STEM learning activities participated in this study. Design and methods Structural equation modeling was used to verify the relationships between variables. Results The results indicated that (1) TNA, IM, and EI were positively related to IGID; and (2) both IM and EI were positively related to IGID. In addition, through the multiple group analysis, it was observed that there were significant gender differences in the idea generation process. Conclusion The findings implied that male teachers performed better than female teachers in TNA, and were more motivated to seek ideas through IM and EI after TNA. Female teachers were more likely to obtain novel ideas through IM. The research provides some ways to facilitate the acquisition of ideas on STEM instructional design, which can be used to guide course design for instructors and course designers in STEM fields.

Pupil's role in educational design: Exploring what it means to have a say in primary school

AbstractThis case study aims to explore the role of pupils in educational design and what it means to have a say in primary school. Although many educational offers use the slogan ‘pupil‐centred’ approach, examples are scarce in which children are seen as partners, let alone co‐designers. It is therefore important to investigate to what extent pupils are involved in the design process and decision‐making in a primary school context. Concepts such as co‐determination, participation, room for choice and competence were discussed. This small‐scale study shows that the school policy regarding participation and co‐design mainly concerns parents but not pupils as much. Teachers have different perspectives about the importance of children's participation. In general, they would like to involve the pupils more in the design process. The lack of time and educational inspection's demand for standardised outcomes are limiting factors. The pupils believe that they sometimes influence how lessons are conducted at school and are allowed to choose how they work on the subject. In general, they feel positive about their competence.

Analyzing the Role of Problem Finding in the Creative Design with Regard to the Effect of Prior Knowledge in the Design Process

Statement of the problem. Despite many researches in the field of design process, there is still mostly the main reliance of the design process on ‘solving the problem’, and designers are evaluated based on their ability to provide the solution. In fact, creativity is defined in ‘quality of the solution’. Results. However, what is less discussed is the ‘problem-finding’. considering that the design problem – unlike problems in other fields – is vague and ill-defined, and is not predetermined; Also, as prior knowledge of the designer is so effective in all stages of the design process and can hinder creativity, due to the desiner’s reference to his own previous experience, so problem finding should be considered as one of the important abilities of a designer. In this regard, students should also be taught to be creative in the problem-finding phase, and teachers should not provide the design problem in a completely defined and fixed way. Conclusions. This research believes that creativity does not occur only in the ideation phase, and the problem finding should be considered as an integral and essential part of the creative design process, whether in professional contexts or education. If the designer can find a novel problem, or see the existing problems from a new angle, it can be expected that there will be no fixation, and creativity will happen in the design.

Development of Macrotexture Test Method for Dense-Graded Asphalt Mixtures

The design and construction of pavements necessitate careful consideration of longevity, cost-effectiveness, sustainability, and safety, with a focus on enhancing the durability and lifespan of dense-graded asphalt (DGA) surface mixtures. This paper discusses a research project the Federal Highway Administration (FHWA) initiated to assess the macrotexture characteristics of DGA mixture pavement—particularly concerning safety at higher speeds. The project aims to develop an efficient testing procedure for measuring macrotexture during mixture design and field-testing processes, striking a balance between longevity, cost-effectiveness, sustainability, and safety in pavement design and construction. The study began with a comprehensive review of existing practices, leading to the selection and testing of a unique laser texture scanner capable of noncontact macrotexture measurement. The subsequent phase involved validating the suggested macrotexture measurement system through data collected from State-sponsored projects under the FHWA Mobile Asphalt Technology Center program. Macrotexture measurements were collected from field cores and laboratory-compacted specimens from various State departments of transportation projects and analyzed. Preliminary analysis of the limited dataset to date revealed a positive correlation between average macrotexture measurements from gyratory specimens’ top surface and field core macrotexture measurements. The FHWA developed a draft test method for measuring macrotexture on laboratory specimens and field cores, thereby aiming to reduce procedural variability. Interlaboratory macrotexture test results demonstrated good reproducibility, with an average coefficient of variation of approximately 20%. Overall, this research project seeks to advance the understanding and measurement of macrotexture in DGA mixture pavements and thereby contribute to the development of safe pavements.

Detector size selection for long-range targeting performance in the extended shortwave infrared band

Interest in the eSWIR band is growing due to focal plane array technology advancements with mercury cadmium telluride and type-II superlattice materials. As design and fabrication processes improve, eSWIR detector size, weight, and power can now be optimized. For some applications, it is desirable to have a smaller detector size. Reduced solar illumination in the 2 to 2.5 μm spectral range creates a fundamental limit to passive imaging performance in the eSWIR band where the resolution benefit of small detectors cannot out-compete the reduced SNR in photon-starved environments. This research explores the underlying theory using signal-to-noise ratio radiometry and modeled target discrimination performance to assess the optimal detector size for eSWIR dependent upon illumination conditions. Finally, we model continuous-wave laser illumination in the eSWIR band to compare the effect of detector size on active and passive imaging for long-range object discrimination.

Automata concepts over game design process

Discrete states linked together by events can describe a series of classical video game scenarios. Therefore, the formal concept of automata seems appropriate for describing such games. However, as simple finite automata need to keep track of past events, they are less appropriate for complex designs. By contrast, push-down automata featuring a stack present better capabilities in this context. This paper discusses an enhanced version of the classic PAC-MAN game with push-down automata. The modular design of this game allows the extraction of discrete states, and its minimalist concept enables various approaches and new versions without sacrificing its original essence. Using push-down automata expanded the game with new features, allowing an enhanced game experience. The automaton controls all aspects of the game, ensuring a consistent gameplay. The presented project demonstrates the capabilities of push-down automata in the gaming industry and their potential in future game development projects.

Update on Chitin and Chitosan from Insects: Sources, Production, Characterization, and Biomedical Applications

Insects, renowned for their abundant and renewable biomass, stand at the forefront of biomimicry-inspired research and offer promising alternatives for chitin and chitosan production considering mounting environmental concerns and the inherent limitations of conventional sources. This comprehensive review provides a meticulous exploration of the current state of insect-derived chitin and chitosan, focusing on their sources, production methods, characterization, physical and chemical properties, and emerging biomedical applications. Abundant insect sources of chitin and chitosan, from the Lepidoptera, Coleoptera, Orthoptera, Hymenoptera, Diptera, Hemiptera, Dictyoptera, Odonata, and Ephemeroptera orders, were comprehensively summarized. A variety of characterization techniques, including spectroscopy, chromatography, and microscopy, were used to reveal their physical and chemical properties like molecular weight, degree of deacetylation, and crystallinity, laying a solid foundation for their wide application, especially for the biomimetic design process. The examination of insect-derived chitin and chitosan extends into a wide realm of biomedical applications, highlighting their unique advantages in wound healing, tissue engineering, drug delivery, and antimicrobial therapies. Their intrinsic biocompatibility and antimicrobial properties position them as promising candidates for innovative solutions in diverse medical interventions.

Transformative pedagogy and visual Literacy: reframing art and design student perspectives on sustainability with illustrated infographics

This study explores the integration of key Transformative Learning Theory (TLT) principles into design education to foster Visual Literacy (VL) and promote awareness of environmental issues among undergraduate students. Through thematic analysis of 22 illustrated infographics, ideation sketches and supporting textual data created by art and design students, the study examines patterns and insights related to perspective transformation, critical reflection, and visual writing skills. Findings reveal pedagogical efficacy when prompting students to explore counter-narratives to the prevailing negative zeitgeist, resulting in perspective transformation and critical reflection of the design process. In turn, this perspective shift and critical reflection fostered the development of students’ abilities to convey complex ideas visually, thus broadening their visual vocabulary to advocate for positive change. Three main categories were considered: Critical Reflection, Perspective Transformation, and Visual Writing Skills, and six sub-categories were identified: Implicit Reflection, Paradigm Shift, Alternative Narratives, Rhetorical Concepts, Intentional Visual-Verbal Communication, and Emotional Visual Language. Implications for scholars include insights into curriculum development and the promotion of ethical and sustainable design practices, while pragmatic applications for faculty offer actionable recommendations for enhancing teaching practices. The study underscores the importance of ethical considerations, diverse perspectives, and real-world applications in nurturing students’ growth as innovative, ethical and sustainable designers.

A Historical Building Information Modeling-Based Framework to Improve Collaboration and Data Security in Architectural Heritage Restoration Projects

With the increasing awareness of architectural heritage conservation and the development of digital technology, there is an urgent need in the field of architectural heritage restoration for a novel solution that can enhance data security, collaboration efficiency, and file management capabilities. This study proposes an Architectural Heritage Restoration Distributed Common Data Environment (AHR-DCDE) framework based on blockchain and IPFS technologies to address the above challenges. The AHR-DCDE framework significantly improves data security and collaborative efficiency in architectural heritage restoration projects by creating a decentralized collaborative design process that achieves data immutability, traceability, and efficient large-scale file processing capabilities. The AHR-DCDE framework significantly improves data security and collaborative efficiency in architectural heritage restoration projects by creating a decentralized collaborative design process that achieves data immutability, traceability, and efficient large-scale file processing capabilities. In this study, the practicality and effectiveness of the AHR-DCDE framework is verified by taking the heritage restoration design project of Pinghe Packing Factory in Wuhan, Hubei Province, as an example. Evaluation of the framework’s network latency, throughput, and storage costs indicates that AHR-DCDE can meet the requirements of architectural heritage restoration projects, possessing efficient capabilities for handling and sharing project data. Furthermore, the implementation of the AHR-DCDE framework also facilitates efficient collaboration among interdisciplinary teams, providing robust technical support for the protection and restoration of architectural heritage.

Microneedles’ Device: Design, Fabrication, and Applications

The delivery of therapeutical molecules through the skin, particularly to its deeper layers, is impaired due to the stratum corneum layer, which acts as a barrier to foreign substances. Thus, for the past years, scientists have focused on the development of more efficient methods to deliver molecules to skin distinct layers. Microneedles, as a new class of biomedical devices, consist of an array of microscale needles. This particular biomedical device has been drawing attention due to its ability to breach the stratum corneum, forming micro-conduits to facilitate the passage of therapeutical molecules. The microneedle device has several advantages over conventional methods, such as better medication adherence, easiness, and painless self-administration. Moreover, it is possible to deliver the molecules swiftly or over time. Microneedles can vary in shape, size, and composition. The design process of a microneedle device must take into account several factors, like the location delivery, the material, and the manufacturing process. Microneedles have been used in a large number of fields from drug and vaccine application to cosmetics, therapy, diagnoses, tissue engineering, sample extraction, cancer research, and wound healing, among others.

Participatory design of a virtual reality life review therapy system for palliative care

We present a novel Virtual Reality (VR) life review therapy system. Life review therapy is an intervention used by clinical psychologists, counselors, and social workers for patients under palliative care to systematically examine various life experiences to resolve conflicts and complete life tasks. The goal of the therapy is to narrativize the patient’s life before death in order to come to terms with their mortality. Our VR life review therapy system allows therapists to perform their interventions in customized virtual spaces designed to encourage the patient to reflect and reminisce about their life experiences. Our system is also developed in response to mobility restrictions and COVID-19 pandemic-related quarantine measures that have separated patients under palliative care from family and friends, resulting in emotional and psychological distress. As VR systems related to health are increasingly being used by therapists in their interventions, it is of utmost importance that the health professionals who will be the end users of these systems are involved in the design process to create ethical healthcare technologies. In response, we initiated the participatory design and evaluation of our VR life review therapy system prototype with six clinical psychologists who have practical experience delivering life review therapy to patients in palliative care in the Hong Kong hospital system. In the study, each participant experienced the VR life review therapy system and evaluated its strengths and weaknesses through semi-structured interviews. The qualitative data gathered from these interviews was coded according to nine different categories; avatars, content design, evaluation, haptic sensations, interaction, gesturing and gaze direction, movement and navigation, non-verbal communication, soundtrack. These conceptual categories were chosen based on our analysis of common themes reported by the clinical psychologists’ experience of the system. Feedback from clinical psychologists on each of these categories was incorporated into the redesign and update of the final system. Overall, participants generally evaluated the system as feasible and effective for use with patients under palliative care, while movement and interaction were the features requiring the most improvement.

Research on the application of improvisation in creative design process

This work explores the evolution of improvisation and its consequences in the design domain, focuses on its applicative value within the design process, dives into the significance of improvisation in design, and presents a team-based creative design framework anchored in improvisation. Utilizing an approach integrating theoretical synthesis and methodological practice, this study comprehensively analyzes team design processes and activities, along with an examination of the challenges encountered by design teams. To investigate how to incorporate improvisation into the design process, this study employs the method of theoretical integration and comprehensive analysis of method practice, summarizes the team design process and design activities, and analyzes the problems and challenges faced by the team design. In the face of problems such as poor communication, lack of motivation, exhaustion of inspiration, and fixed thinking faced by design teams during the creative conception stage, improvisation encourages designers to explore any possible ideas and creates a relaxed and humorous design environment, which can effectively break the fixed thinking of design, expand creative thinking space, promote team cooperation and communication, and improve team collaboration efficiency.

A novel finite-time leader-follower consensus control for a disturbed mechanical nonlinear system in presence of actuator saturation

This paper presents a novel leader-follower consensus control for a particular class of nonlinear multi-agent mechanical systems in the presence of control input constraints and external disturbances which includes robot system dynamics with a wide range of potential applications in industry. In this case, one of the agents is selected as the leader to direct the other agents in such a way that the whole system can reach consensus within certain prescribed performance transient bounds. Due to the presence of disturbances in most practical systems, the effect of limited disturbance in the consensus control method has been investigated, and actuator saturation is included in the design process. A terminal sliding mode control method has been adapted to ensure the stability of the overall system and fast finite-time leader-follower consensus control. The simulation results of the multi-agent nonlinear robot system in MATLAB environment, in different scenarios with simultaneous consideration of actuator saturation and external disturbance, will show the efficiency of the proposed control method.

Will the design of the human–product relationship follow user experience?

Abstract Today, user experience (UX) is an essential aspect of the design of digital, interactive products. Thirty years ago, however, things looked different. The focus was not on the experience but on the metaphor of the tool or medium. But how will the design of digital, interactive products develop over the next 30 years? How will the design of products and services change, and how will this influence the UX profession? One possibility is highlighted in particular: focussing on the relationship between the user and the product with elements such as emotional connections. Through relationships, the roles of artificial intelligence, humanity and ethics in the design process and the importance of sustainability and adaptation to changing working and learning environments become particularly relevant. In the future, designers must assume even greater responsibility for users, society and the environment.

Robust Adaptive Controller Design for Uncertain Second-Order Jerk Chaotic Systems

In this paper, the stabilization problem for a class of uncertain second-order jerk chaotic control systems is investigated. Combining differential and integral inequalities with nonlinear theory, we intend to construct a robust adaptive controller to promote a class of uncertain second-order jerk chaotic control systems to achieve the goal of adaptive stability. Finally, an example will be provided to illustrate the design process of the adaptive controller, and some numerical simulation results will be offered to demonstrate the correctness and effectiveness of the main result

Influence of Soil Structure Interaction on Seismic Performance of Steel Structure Interaction with Different Types of Foundations and Soil

Influence of Soil Structure Interaction on Seismic Performance of Steel Structure Interaction with Different Types of Foundations and Soil

Short-term extreme value prediction for the structural responses of the IEA 15 MW offshore wind turbine under extreme environmental conditions

As offshore wind turbines enter deep seas, large-scale models ranging from 15 MW to 20 MW are becoming the mainstream choice for the future market. The dynamic responses of 15 MW wind turbines under extreme environmental conditions should be considered in the design process. With increasing structure sizes, the mooring systems and tower base structures play essential roles in maintaining position and supporting wind turbines under harsh environmental conditions. Accurate estimation of the extreme mooring loads and dynamic responses at the tower base is crucial, particularly for the ultimate limit state (ULS) analysis. The dynamic responses of the offshore wind turbine are calculated by Open Fast and validated with other numerical tools. For the safety of deep-sea structures, it is necessary to consider the extreme environmental conditions with a 100-year return period, which is beyond the current standards. An environmental contour-based approach is proposed to select the short-term extreme conditions, enabling approximate prediction of the extreme values of the dynamic responses during the preliminary design stage. The Gumbel method and the ACER method are used to predict the short-term extreme dynamic responses. Comparative evaluations against the relevant standards for floating wind turbines are conducted to assess structural safety.