Tind Technologies (Norway)
Hes-so: ArODES Open Archive (University of Applied Sciences and Arts Western Switzerland / Haute école spécialisée de Suisse occidentale / FH Westschweiz)Not a member yet
15764 research outputs found
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Visual soil structure quality is mostly explained by small‐size structural pores
No full textVisual assessment of soil structure receives growing interest but its physical meaning is still to be explored. This study examined the relationships between soil pore systems volume and size distribution and visual structure quality scores in undisturbed soil samples from Swiss cropland soils covering a wide range of soil organic carbon (SOC) and clay contents. Structure quality scores were determined with CoreVESS. The pore system volumes were quantified by shrinkage analysis, and the water retention curves were used to determine the equivalent pore-size distribution. CoreVESS scores showed non-linear relationships with total and structural pore volumes. They correlated mainly to structural porosity volume, whereas plasma pores did not explain structure quality scores. As a result, the total porosity was less correlated to CoreVESS than structural porosity. The small-size (< 50–100 μm equivalent diameter) structural pore volume showed the higher correlation to structure quality score. The small-size structural pore volume was mostly correlated with the SOC:clay ratio and, to a lesser extent, with SOC, highlighting the link between soil structure quality and clay-SOC complexation in these soils. Soils with SOC:clay ratios above 0.1 showed significantly larger volumes of small structural pores. Our findings underline the functional importance of these small-size structural pores, which are also accounting for air-water equilibrium close to field capacity, and were pointed out for their role as soil biota habitat. Their tight relationship with SOC suggests a good stability upon stresses and slow changes over time. In contrast, large structural pores, which are known to be sensitive to mechanical stress of soil fauna activity, were primarily influenced by carbonate content
menuCH Kids ::swiss national nutrition survey in children and adolescents : report
No full textThe menuCH-Kids national survey was initiated to deliver the first comprehensive overview of the diet, health, and lifestyle of children and adolescents in Switzerland. Commissioned and funded by the Federal Food Safety and Veterinary Office, the survey was conducted by a consortium of Swiss institutions under the coordination of Unisanté. Data collection for this population-based survey was carried out between 2023 and 2024 across six study centres located throughout Switzerland. Participants were randomly selected from population registries to ensure representation across the French-, German-, and Italian-speaking regions. In total, 1 852 children aged 6 to 17 years took part in the main survey (participation rate 11.9%). Information was collected across four domains: 1) Sociodemographic characteristics and lifestyle factors, including physical activity, screen time, sleep patterns, dietary habits, and general health status, were assessed using standardised questionnaires. 2) Dietary intake was evaluated through two 24-hour dietary recalls/records complemented by a brief food propensity questionnaire. 3) Physical assessments were conducted at the study centres and included anthropometric, blood pressure, and body composition measurements. 4) Biological samples, including urine samples and voluntary blood specimens, were collected to assess nutritional status, measure metabolic biomarkers and contaminants, and contribute to the creation of a biobank. First key findings show some positive dietary behaviours (like frequent breakfast, appropriate energy intake, infrequent lunches eaten out). Among the dietary behaviours to be improved are the low fruits and vegetables consumption, the high meat and protein intakes, and the frequent consumption of snacks and sugary drinks. Among 14-17-year-olds, 11.8% are regular or occasional smokers and 32.7% are occasional alcohol consumers, plus 5.5% of regular ones. Physical activity is insufficient (from 50% meeting the ≥60 min of physical activity each day in younger boys to 16% of older girls). The prevalence of overweight or obesity is 12.9%. Risk factors of cardiovascular and metabolic disease were assessed, such as elevated blood pressure (14.7% with systolic blood pressure >90th percentile), elevated glycated haemoglobin (10.4% with Hb1AC > 5.7% and 0% > 6.5%) or elevated cholesterol values (8.7% with total-cholesterol > 5.1mmol/l). In conclusion, menuCH-Kids provides a unique and comprehensive dataset on the nutrition and lifestyle of children in Switzerland. It establishes a solid foundation for public health and nutrition research and will inform the development of evidence-based strategies and policies aimed at promoting healthy dietary behaviours, creating age-appropriate nutrition recommendations tailored to the Swiss youth, and guiding food safety and risk assessment of contaminants
Changing Art from the outside in
No full textFrom the 1989 Magiciens de la Terre exhibition to the two latest editions of documenta and the Venice Biennale, the art world has become receptive to historically excluded creative practitioners, which has in turn generated some heated debate. While cultural circles over the past ten years have come to agree on the need to open up to a globalized, hyper-connected world, they are far from any consensus on how to go about it. Who deserves to be included? On what basis? Who does the selecting? Who remains left out? This manifesto outlines the decentralizing approach needed to open up the art world and its institutions to greater diversity. Drawing on her experience as a mediator for the Nouveaux Commanditaires (New Patrons), the author argues that to be more inclusive, we need to make greater allowance for other ways of relating to artifacts than that of aesthetic contemplation, the dominant mode in Western art institutions. The very concept of art itself needs to be revised, even if that means rocking its foundations
Modélisation d'images générées par IA grâce à la réalité mixte et au retour vibrotactile
No full textWe propose a mixed-reality experience to generate images by artificial intelligence using haptic interactions. In this experiment, users interact with tangible spheres using haptic feedback. The result of this textured modeling is then interpreted as a prompt to generate an image. The aim is to experiment with a paradigm shift in interaction with image generation models, moving from a textual prompt to a haptic and visual prompt.Nous proposons une expérience en réalité mixte pour générer des images par intelligence artificielle en utilisant des interactions haptiques. Au cours de cette expérience, les utilisateurs.rices interagissent avec des sphères tangibles grâce par retours
GIM3D ::a pilot study of intuititve 3D motion control HMI
No full textIn many fields such as sports training, rehabilitation, and virtual prototyping, the ability to communicate movement information rapidly, intuitively, and unambiguously is essential. In sports, a key challenge for coaches is conveying precise motion adjustments to athletes. This short paper introduces GIM3D, a user interface designed to enable fast and intuitive manipulation of 3D running movements generated. A pilot study with five participants shows a strong willingness to use the tool (F-SUS score = 85.5). The UEQ S resulted an overall average of 2, with higher pragmatic quality (2.35) than hedonic (1.65). Users found the tool supportive, clear, and efficient. Initial results demonstrate the efficiency and plausibility of the generated movements, highlighting the potential of GIM3D as a tool for both practitioners and researchers in human motion science.Dans de nombreux domaines tels que l’entraînement sportif, la rééducation et le prototypage virtuel, il est essentiel de pouvoir communiquer des informations sur les mouvements rapidement, intuitivement et sans ambiguïté. Dans le domaine du sport, l’un des principaux défis pour les entraîneurs consiste à transmettre aux athlètes des ajustements précis de leurs mouvements. Cet article présente GIM3D, une interface utilisateur conçue pour permettre la manipulation rapide et intuitive de mouvements générés de course en 3D. Une étude pilote menée auprès de cinq participant·es montre une forte volonté d’utiliser l’outil (score F-SUS = 85,5). L’UEQ-S a donné une moyenne globale de 2, avec une qualité pragmatique (2,35) supérieure à la qualité hédonique (1,65). Les utilisateurs·trices ont trouvé l’outil utile, clair et efficace. Les premiers résultats dé montrent l’efficacité et la plausibilité des mouvements générés, soulignant le potentiel de GIM3D en tant qu’outil pour les prati cien·es et les chercheurs·euses en science du mouvement humain
Haptree ::a haptic experience design space
No full textAs a field, haptics encompasses a wide and diverse array of technologies, modalities, and applications, which makes it challenging to understand, classify, and compare comprehensively. In this paper, we introduce Haptree: a design space framework developed based on a review of existing literature and building on top of existing taxonomies. Unlike other haptic frameworks that focus on specific aspect of haptics, Haptree is intended to show the big picture of haptic experiences, connecting together aspects of haptic experience that used to be isolated in other frameworks. Haptree maps haptic experiences in five different stages, from hardware characteristics to end-user applications. It provides practical guidelines for designing new haptic experiences by referencing existing approaches and use cases, or pointing to a current gap in the literature. Furthermore, Haptree is intended to be a community-driven tool, designed for iterative refinement and contribution by the haptic research community. Finally, we outline future steps, including validating and enhancing Haptree through community engagement and empirical studies
Implementation of an LQR-based swing-up and stabilization controller for the furuta pendulum using an STM32 microcontroller
No full textThe Furuta pendulum is an interesting subject for some researchers, especially control engineers. Its nonlinear and underactuated characteristic make it challenging to stabilize it. It is used as a benchmark model for validating linear and nonlinear control strategies. Here, in this paper, we present an implementation of a real-time controller for the Furuta Pendulum using an STM32 microcontroller. The controller combines an energy-based swing-up strategy and a Linear Quadratic Regulator (LQR) for stabilization at the upright position. A full-state feedback control law is derived from a linearized state-space model of the system. The algorithm is deployed on an STM32F411RE microcontroller using encoder feedback and PWM-based motor control. Simulation and experimental results demonstrate the effectiveness and robustness of the proposed system under varying initial conditions, with the controller achieving faster stabilization (0.6–1.9 s), reduced oscillation frequency, and smaller steady-state deviation from the reference value
Considering the presence of users while assessing indoor radon levels in public schools on short-term periods of investigation
No full textIn Switzerland, official radon measurements in schools require either a yearlong passive measurement or a minimum three-month passive measurement during the heating season. For cases where these durations are impractical, such as before renovations, short-term methodologies have been developed to estimate radon levels. Since 2018, the Federal Office of Public Health (FOPH) has proposed a short-term real-time measurement procedure to estimate the probability of exceeding 300 Bq/m3 under pressurized winter-like conditions, using a 168-hour protocol. An alternative methodology, adapted from Norway’s 2015 protocol, considers occupancy periods and uses a 120-hour investigation window. This study aims at implementing and comparing these two approaches in schools in the Canton of Fribourg, where previous dosimetric radon measurements were available. Results reveal that both methodologies yielded comparable outcomes, identifying radon concentrations exceeding reference levels when appropriate. However, the protocol considering occupancy offers a more targeted approach, particularly when high radon levels occur outside of occupation hours. This finding emphasizes the importance of accounting for occupancy when assessing radon risks, as it optimizes remediation efforts and ensures measures are proportional to the actual health risk. Both methodologies have practical applications, but incorporating occupancy schedules can better balance safety, cost, and comfort for building occupants
A new telemonitoring feature for detection of long-term CPAP adherence
No full textRationale : Suboptimal adherence limits the efficacy of Continuous Positive Airway Pressure (CPAP) in Obstructive Sleep Apnea (OSA).
Objective : To determine whether the Monthly Adherence Standard Deviation (MASD), that quantifies the variability in CPAP use during the baseline month (January 2021, at least the fourth month of treatment) provides predictive information about adherence, 6 and 12 months after baseline that would not be captured by the Monthly Adherence Mean (MAM) value alone.
Methods : This retrospective analysis includes CPAP telemonitoring data from a population of 1612 patients. The overall population was randomly assigned to a construction (80 %) and test cohort (20 %) for internal validation. A threshold on baseline MASD was defined using a Receiver Operating Characteristic (ROC) curve. Results : A MASD threshold of 1.76 h was identified. Based on this threshold and the standard 4 h/day criterion applied to the MAM, patients were classified into four groups: high MAM/low MASD, high MAM/high MASD, low MAM/low MASD, and low MAM/high MASD. Significant differences were observed among the groups 6 and 12 months after baseline data. Six months after baseline, average MAM for each patient group in the test population were 6.84 ± 1.58, 5.66 ± 1.97, 1.27 ± 2.09, and 3.04 ± 1.90 h/day, respectively (p < 0.001); percentages of adherent patients were 91.4 %, 69.9 %, 6.25 %, and 13.9 % (p < 0.001). Similar patterns were found 12 months after baseline.
Conclusions : MASD in CPAP adherence can distinguish between patients with different adherence behaviors 6 and 12 months after, capturing patterns not evident from MAM alone