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The growing demand for responsible resource use presents a significant challenge in today’s time-, cost-, and quality-driven product development. Therefore, this paper explores integrating creativity techniques into early development phases to achieve innovative, lightweight, and sustainable designs. Using a case study on extending the useful life of a bicycle trailer, a generic framework is introduced, aligning lightweighting and sustainability objectives in the idea generation process. Lessons learned highlight the critical role of the moderator, the importance of an iterative process, and the need for guidelines on method selection. The findings provide actionable recommendations for fostering sustainable innovation in lightweight design and form a basis for further research on adapting creativity techniques to sustainability goals.
Carbon fiber-reinforced plastics (CFRP) have a great lightweight potential due to their high strength-to-weight ratio. However, new challenges arise due to complex production processes and the large number of design parameters that are subject to variations. This study advances simulation methodologies to address these challenges by modeling the entire CFRP production process while accounting for fiber angle variations at each step. The approach enables prediction of assembly stresses and deformations by utilizing surrogate models, and supports further approaches, such as tolerance optimization and process refinement. Two case studies demonstrate the effectiveness of the method and illustrate its potential to support the optimization of the production process.
Designer and user have different perspectives on a product. This can lead to differences in their evaluation and classification in usage situations. Not least, products are evaluated from different backgrounds of experience. Communication between user and designer therefore appears to be crucial to support this mutual process of understanding. Prototyping is a widely used and recognised tool in development. The use of these as non-verbal instruments in communication, however, poses specific challenges for the designer, since ambiguities in interpretation are also possible here. The aim of this paper is therefore to develop a model that describes the communication between developer and user via prototypes to identify factors influencing the communication-process. Based on this communication model, initial implications for the design of prototypes will be derived
Packaging waste contributes significantly to resource depletion and pollution. Despite the crucial role of packaging in product preservation, its environmental impact has become a major issue. Addressing the circularity and sustainability (C&S) of packaging by design offers a route to mitigate these impacts and reduce waste. However, integrating C&S into the current packaging design process presents significant challenges, such as conflicts between C&S and functional requirements and inadequate tools to provide packaging-specific practical solutions. To address these challenges, this study proposes a novel packaging design framework developed through literature review, brainstorming sessions, and field visits. By incorporating iterative design strategies and leveraging past design knowledge, the framework empowers designers to create packaging solutions that meet C&S requirements.
This study investigates the accumulation of glycogen, amino acids, and fatty acids in male Mytilus coruscus during different stages of gonadal development and explores their relationships with reproductive processes. Glycogen levels were highest during the resting phase, decreasing progressively during the proliferation and maturation phases. A positive correlation was observed between glycogen and carbon content, indicating a close association between energy storage and metabolic processes. Amino acid content, particularly essential amino acids (EAAs), increased during gonadal development, reflecting the higher demand for protein synthesis and cellular metabolism. Branched-chain amino acids (BCAAs) such as isoleucine, leucine, and lysine were key in activating protein synthesis and supporting gametogenesis. Non-essential amino acids like aspartic acid, glutamic acid, and glycine also accumulate, supporting cellular function and reproductive regulation. Fatty acids, especially unsaturated fatty acids (UFAs) and polyunsaturated fatty acids (PUFAs), progressively accumulated in the testes, highlighting their role in energy supply and membrane integrity during gametogenesis. Phosphorus (P) accumulated in parallel with fatty acids, supporting DNA and RNA synthesis, energy metabolism, and cell membrane function. This study emphasizes the crucial role of these biochemical components in supporting gonadal development in male M. coruscus, providing insights into the metabolic pathways involved in marine bivalve reproduction.
This paper examines the gendered foundations of citizenship status among first-generation immigrants in Western Europe. It posits that foreign-born women are more likely than foreign-born men to become citizens in their new homeland if they originate from countries with greater gender inequality. Moreover, this relationship is amplified among highly educated female immigrants. In contrast, no gender gap in citizenship status exists among newcomers from origin countries with low gender inequality. The empirical analyses based on the individual-level data from the European Social Survey (ESS) 2010–22 confirm these expectations. These findings have important implications for our understanding of immigrant political integration in western democracies and the consequences of gender inequality around the world.
As conceptual design sketches are a common tool used to communicate between team members, it is important to understand the relationship between sketch characteristics and engineers’ perceptions. This study evaluates 4 line styles common in many sketch techniques: the Single Line, Feathered Line, Heavily Feathered Line, and Variable Line. 40 mechanical engineers ranked preferences of complex engineering products in these line styles and provided adjectives to describe their choices. Results show that engineers preferred the Single Line, which had the common adjectives of clear and professional. The findings suggest that engineers should generally be learning and using a single, uniform and clean line style.
AI-assisted methodologies captured lived experiences and enhanced innovation practices, supporting practitioners, policymakers, and researchers in designing ageing technology. This study examined AI-assisted methods, leveraging open conversations with 30 seniors to address the complexities of ageing and technology in Singapore. Using prompt engineering, we analysed coded data with role-based, context-providing, and information-seeking prompts, generating Python code for clustering analysis. The focus was on seniors’ perceptions of technology and health concerns, revealing 25 indicators across six health dimensions. Of these, 12 social-emotional determinants influenced perceptions through emotional support and social interaction on technology adoption. Our analysis produced a four-cluster typology, providing a systematic framework to categorise perception patterns and address seniors’ diverse needs.
This retrospective paper explores the profound impact of DesignX at the Stanford Center for Design Research (CDR) on engineering design research and education. Through a historical lens, the authors examine the evolution of the DesignX laboratory and its role in fostering interdisciplinary collaboration, innovative research, and team-based research by highlighting key milestones and influential projects over time. The authors also discuss the pioneering role of Stanford Professor Larry Leifer, whose leadership of CDR for much of its history shaped the practices and methodologies of engineering design from the 1980s up through the 2020s. This paper underscores the significance of Leifer’s contributions to the academic community and the enduring legacy of DesignX in advancing the field of engineering design research and education.
In the undergraduate design education curriculum, there is a growing recognition of the transformative potential of including bio-inspired design thinking concepts. This paper describes a capstone design project for senior engineering students at UGA that involved integrating bio-inspired AI and vision in K-12 lesson modules. Through the capstone design project, one student team developed a product that integrated bio-inspired vision in a lesson module for K6-8 incorporating state Standards of Learning. The results of student work in terms of final design/product and project experiences are presented and discussed. Implications for engaging K-12 teachers/students through bio-inspired AI and vision design concepts, and inspiring them to pursue STEM careers are discussed.
Hormone replacement therapy (HRT) for transgender men involves various formulations of testosterone, each exhibiting unique pharmacokinetic profiles and emotional impacts. A comprehensive understanding of these variations is crucial for optimizing treatment outcomes and managing side effects effectively.
Objectives
This study aims to elucidate the differential emotional effects associated with various testosterone formulations used in HRT for transgender men.
Methods
A comprehensive literature review was conducted using databases such as PubMed, Scopus, and Web of Science. The review focused on four primary testosterone administration methods: intramuscular and subcutaneous injections, transdermal patches and gels, oral testosterone, and implantable pellets. Key metrics evaluated included pharmacokinetics, emotional effects, and nature of side effects.
Results
The review identified distinct pharmacokinetic profiles and emotional responses associated with each testosterone formulation:
Intramuscular and Subcutaneous Injections: These methods showed peak testosterone levels within 24-48 hours, followed by a decline over one to two weeks. Emotional effects included mood elevation and increased energy during the peak phase, with potential irritability or anxiety. The trough phase was marked by mood swings and depressive symptoms, particularly before the next injection. Side effects such as acne and libido changes peaked shortly after injection and decreased before the subsequent dose.
Transdermal Patches and Gels: These methods maintained consistent blood testosterone levels, resulting in stable mood and emotional states with reduced mood swings. Initial therapy adaptation caused mild mood changes, and side effects were primarily localized to skin irritation at application sites.
Oral Testosterone: Testosterone undecanoate offered stable testosterone levels with consistent mood regulation. Gastrointestinal side effects were common, and emotional stability varied based on absorption rates and adherence to dosing schedules.
Implantable Pellets: These provided the most stable testosterone levels over several months, leading to very stable emotional states with minimal mood fluctuations. Side effects included localized reactions such as discomfort or infection at the implantation site, with minimal systemic side effects.
Conclusions
The choice of testosterone formulation significantly impacts the emotional well-being of transgender men undergoing HRT. Intramuscular and subcutaneous injections were associated with emotional fluctuations tied to hormone peaks and troughs, while transdermal, oral, and implantable methods provided more stable hormone levels and emotional states. Regular monitoring and individualized modifications are crucial to optimizing physiological and emotional outcomes and enhancing the quality of life for transgender men.
Lifestyle factors are being increasingly studied in bipolar disorder (BD) due to their possible effects on both course of disease and physical health.
Objectives
The aim of this study was to jointly describe and explore the interrelations between diet patterns, exercise, pharmacological treatment with course of disease and metabolic profile in BD.
Methods
The sample consisted of 66 euthymic or mild depressive individuals with BD. Clinical and metabolic outcomes were assessed, as well as pharmacological treatment or lifestyle habits (diet and exercise). Correlations were explored for different interrelations and a factor analysis of dietary patterns was performed.
Results
Adherence to the Mediterranean diet was low, seen in 37.9% of the patients and was positively associated with perceived quality of life. The amount of exercise was negatively associated with cholesterol levels, with 32.8% of participants rated as low active by International Physical Activity Questionnaire. There was a high prevalence of obesity (40.6%) and metabolic syndrome (29.7%). Users of lithium showed the best metabolic profile. Interestingly, three dietary patterns were identified: “vegetarian,” “omnivore” and “Western.” The key finding was the overall positive impact of the “vegetarian” pattern in BD, which was associated with reduced depression scores, better psychosocial functioning, and perceived quality of life, decreased body mass index, cholesterol, LDL and diastolic blood pressure. Nuts consumption was associated with a better metabolic profile.
Conclusions
A vegetarian diet pattern was associated with both, better clinical and metabolic parameters, in patients with BD. Future studies should prioritize prospective and randomized designs to determine causal relationships, and potentially inform clinical recommendations.
Infertility can have a profound impact on couples, causing emotional distress and negatively affecting sexual well-being. In Tunisia, it contributes to over 20% of divorce cases due to relationship strain. Despite its significance, research on the influence of infertility on sexual experiences, particularly gender differences, remains limited.
Objectives
This study aims to evaluate the effects of infertility on sexual health of Tunisian infertile couples and to compare these effects between men and women.
Methods
We conducted a cross-sectional study involving sexually active infertile couples who had been under follow-up for at least one year at a specialized Assisted Reproductive Technology center in Tunis. Each participant completed closed-ended questions regarding their sexual experiences following the infertility diagnosis, including the frequency of sexual intercourse, preferred types of sexual activities, sexual positions believed to enhance conception, and overall sexual rhythm. The Arizona Sexual Experiences Scale (ASEX) was used in Arabic to assess sexual function.
Results
A total of 60 infertile couples participated in the study. The average age of women was 35.07 ± 4 years while the average age of men 41.1 ± 6 years. Regarding sexual intercourse frequency, 35% of women (n=21) and 27% of men (n=16) reported a decrease, with no significant gender difference (p=0.426).
Infertility did not significantly alter preferences for sexual practices, as 78% of women (n=47) and 85% of men (n=51) reported no changes. Vaginal penetration was the predominant activity for both sexes (100%), while mutual masturbation was engaged in by 68% of women and 72% of men. Oral sex was reported by 57% of women and 53% of men, with no significant gender differences (p>0.05).
In terms of sexual positions, 48% of women and 50% of men favored specific positions to enhance conception, with no significant differences (p=0.995). However, 48% of women and 64% of men adhered to a calendar-based rhythm, with women perceiving this regimen as more detrimental to spontaneity (p=0.038 and p=0.041).
Sexual dysfunctions were significantly more common in women, with a prevalence of 28% compared to only 5% in men. Desire disorders were the most commonly reported sexual dysfunction for both genders. Women exhibited significantly higher rates of physical and psychological arousal problems, as well as orgasmic disorders (p<0.05).
Conclusions
Screening for sexual dysfunction in infertile couples is essential not only for improving sexual health but also for providing tailored psychological support that considers gender differences. By identifying and addressing these issues, healthcare providers can enhance the overall well-being of couples dealing with infertility challenges.
Sleep disturbances are common among individuals with bipolar disorder (BD) and may be present even during euthymic phases and significantly impact illness course and quality of life. This preliminary analysis is part of BEGIN (The Bipolar Exposome-Gene Interaction Naturalistic study.
Objectives
Here, we analyze the relationship between subjective sleep disturbances and various lifestyle and environmental factors in BD patients.
Methods
Eighty-seven patients diagnosed with BD (Mean age = 50.7 years, SD = 13.6; 44.7% female; Mean BMI = 26.9, SD = 4.61) all in a three-month euthymic phase, were recruited. At baseline, participants completed lifestyle questionnaires covering diet, light exposure, and time spent indoors, alongside assessments of clinical history and circadian rhythms using the BRIAN scale. Sleep quality was assessed through the Pittsburgh Sleep Quality Index (PSQI, with a cutoff >5 for sleep problems) and the Epworth Sleepiness Scale (ESS, with a cutoff >10 indicating excessive daytime sleepiness). Sociodemographic, clinical, and environmental factors were compared between BD patients with and without sleep disturbances.
Results
Based on ESS scores, patients with excessive daytime sleepiness had significantly higher overall circadian rhythm disruptions, as indicated by the BRIAN total score (p = 0.049). A negative correlation emerged between excessive daytime sleepiness and age at first hospitalization (r = -0.36, p = 0.003). Disrupted eating patterns, reflected in the BRIAN eating subscale, also correlated with excessive daytime sleepiness (r = 0.27, p = 0.027). Based on PSQI scores tobacco smoking was positively associated with poor sleep quality (r = 0.42, p = 0.013), while more time spent with artificial light from electronic devices (r = -0.29, p = 0.019), and less time spent indoors (r = 0.39, p = 0.001) correlated with worse sleep quality. Patients experiencing poor sleep also showed less consistency in social routines (BRIAN social score, p = 0.028).
Conclusions
These preliminary findings suggest that sleep disturbances in BD patients may be intricately linked to lifestyle and environmental factors, such as circadian rhythm disruptions, smoking, and exposure to artificial light. These results highlight the importance of considering environmental and lifestyle modifications to support sleep quality in BD. Future longitudinal analyses will be essential to clarify causal pathways and develop targeted interventions that address circadian and lifestyle factors in managing BD.
People with unbearable psychiatric suffering and a chronic death wish are a subgroup of patients with Severe and Persistent Mental Illness (SPMI; Moureau et al., FiP 2023; 14:1094038). They suffer from at least one, but usually multiple psychiatric disorders, in a chronic course, resulting in severe limitations in psychosocial functioning (Woods et al., CJP 2008; 53 725-736.). Their chronic death wish is rooted in their struggle with life and death and diminished perspective on the alleviation of their suffering. They are at risk for suicide and/or are eligible to request euthanasia as legislated in Belgium. Reakiro is a Belgian pilot project and a drop-in, care and expertise centre developing tailored mental healthcare for this target population in addition to continued care as usual.
Objectives
To describe psychological and existential characteristics, care needs, experienced changes and the correlations between these variables in 107 consecutive Reakiro patients who agreed to participate in this study.
Methods
The Beck Scale for Suicide Ideation (BSSI), Dutch Empowerment Scale (DES), Herth Hope Index (HHI), Meaning In Life Measure (MILM), Existential Concerns Questionnaire (ECQ), Outcome Questionnaire-45 (OQ-45) and the Change Questionnaire (CQ) were administered combined with an assessment of their life and death wish and of how they experience the care in Reakiro.
Results
The BSSI (M = 21.78, SD = 8.48), DES (M = 113.39, SD = 20.42), HHI (M = 24.15, SD = 5.40), MILM (M = 5.39, SD = 1.50), ECQ (M = 62.13, SD = 12.10) and OQ-45 (M = 98.93, SD = 20.50) show heightened levels of suicidality, existential anxiety and symptomatology and lowered levels of hope, meaning in life and empowerment, compared to other psychiatric and non-clinical samples. Longer trajectories in Reakiro were correlated with heightened hope and lowered symptomatology, but not with suicidality. The preliminary CQ-analysis revealed 31 participants reporting positive changes in their relation to life and death, to self and others and to hope and future; 8 participants reported negative changes in their relation to life and death.
Conclusions
The results depict a concrete profile of the severity of the suffering and suicidality in these patients. The mixed-methods design reveals a major group that does not report any change and suffers greatly, but also a minor group that reports positive changes and even lowered suicidality. Clinical implications for psychiatric healthcare professionals will be discussed.
Pseudodementia presents with symptoms resembling dementia but with cognitive dysfunction improving after depression treatment. Dementia is a progressive, irreversible disorder causing impairment in multiple cognitive domains and daily activities. In the elderly, depressive disorders can manifest as pseudo-forgetfulness due to deterioration of attention functions, while cognitive decline and behavioral changes in dementia may mimic depression. Distinguishing between elderly depression and dementia is challenging because depression often co-occurs with cognitive impairments, and dementia frequently presents with depressive symptoms.
Objectives
This case report aims to highlight the importance of differential diagnosis in cognitive impairments among the elderly by presenting a case where frontotemporal dementia insidiously developed on a background of pseudodementia.
Methods
A 62-year-old woman with a recent history of treatment for depressive symptoms exhibited a gradual decline in planning abilities and behavioral changes over time. Following a non-suicidal jump attempt, she was admitted to the psychiatric ward for diagnostic clarification and treatment. A thorough evaluation of her socio-demographic data, family history, and medical and psychiatric history was conducted.
Results
The patient’s initial complaints began after a psychosocial stressor, including headaches, depressed mood, loss of interest, sleep disturbances, attention difficulties, and increasing forgetfulness. Struggling with daily tasks led her to consult neurology, where age-appropriate atrophy was observed. She was prescribed migraine medication and metformin. Referred to psychiatry, she received sertraline with a preliminary diagnosis of depressive disorder but missed follow-up due to limited social support. Over the next five months, she developed reduced planning abilities, behavioral changes, aimless wandering, inappropriate mood shifts, weakness, and significant functional decline. After a non-suicidal jump attempt, she was admitted to psychiatry. Observations revealed persecutory thoughts and agitation. MRI showed pronounced frontal lobe atrophy inconsistent with her age. Diagnosed with frontotemporal dementia, she was discharged on olanzapine 5 mg and donepezil 10 mg.
Conclusions
This case demonstrates how confounding factors in dementia can adversely affect clinical progression, emphasizing the importance of social support and regular follow-up for accurate diagnosis and treatment. In patients with irregular follow-ups and low social support, conditions like dementia can have dramatic and irreversible courses. Therefore, performing differential diagnosis for dementia in elderly patients with depressive symptoms and reassessing dementia etiologies during follow-ups are vital.
Depression is one of the most important medical and social problems in old age due to its high prevalence (10-25%) and a significant increase in the burden on social services and medical institutions. A diverse combination of biological factors of aging contributes to the polymorphism of clinical manifestations of late-life depression.
Objectives
Study of the clinical features of depressed patients of late age of three identified neurobiochemical models of energy, antioxidant and glutamate metabolism.
Methods
The study material consisted of 52 hospitalized patients (40 women and 12 men) aged 60-86 years with a depressive episode of recurrent depressive disorder, bipolar affective disorder and a single depressive episode (ICD-10). The patients were examined by clinical, psychometric, biochemical and statistical methods. Before starting therapy, psychometric assessments were performed using the Hamilton Anxiety and Depression Rating Scales and the Mini-Mental Status Examination. On the same day, the activity of enzymes of energy (cytochrome c oxidase - CO), antioxidant (glutathione reductase - GR and glutathione S-transferase - GST) and glutamate (glutamate dehydrogenase - GDH) metabolism enzymes in blood platelets was determined in patients.
Results
In patients with a decrease in energy and antioxidant metabolism (↓GR, GST, HD and ↑GDH), there was a predominance of shallow apathetic depression of a “seasonal” nature with the presence of mild cognitive impairment, a later age of manifestation, and a high incidence of cerebrovascular pathology. Patients with “disharmonious” metabolism (↓ GR, GST, GD and ↑ CO) were characterized by an early onset of the disease, its longer duration, more severe and complex depression with a pronounced anxiety component. Patients with a conditionally “normal” metabolism were more likely to experience typical melancholy depression and the lowest incidence of severe cerebrovascular pathology.
Conclusions
The relationship has been established between the clinical features of late-life depressions and changes in the activity of enzymes of energy, antioxidant and glutamate metabolism. It was revealed that the type of metabolism with “reduced” and “disharmonious” activity of these enzymes corresponds to the parameters of late and early manifesting depression. Thus, the clinical heterogeneity of late-life depression is closely related to different neurobiochemical types of metabolism.